CN100476310C - Method of classified rule-based fault detection and diagnosis in air-conditioning system - Google Patents

Abstract

The invention relates to a method of classified rule-based fault detection and diagnosis in air-conditioning system, which maintains the interchangeability of the HVAV system of huge buildings by reducing the signal of cheap sensor and temperature sensor, chooses the running models for different seasons and examines whether the running factors are broken, and overcomes the disadvantage of the APRA algorithm by the single failure detecting fashion aiming the special factor. The present invention maintains simply the interchangeability of the HVAV system of huge buildings by using the signals of the cheap sensor and temperature sensor, which is adapted to the air-conditioning system of the huge buildings and is capable of overcoming the disadvantage of the APRA algorithm by the single failure detecting fashion aiming the special factor.

Description

Air-conditioning system method for diagnosing faults based on the sort-type rule

Technical field

The present invention relates to a kind of fault detect of single position and diagnostic method based on the sort-type rule, fault detect of single position and diagnostic method based on the sort-type rule of the present invention can be found out this element exactly when the arbitrary key element that constitutes air-conditioning system breaks down, can stop the performance decline because of this key element to cause that the situation that total system wastes energy takes place in the shortest time.

Background technology

Recently, along with the high stratification and the intellectuality of building, device systems is also various day by day and complicated.Comprise building HVAC (Heating, Ventilation and Air Conditioning: the warm braw ventilating system) system increases day by day in interior energy device scale, along with automation and complicated process, economic loss when breaking down and danger are also serious day by day.Find according to some results of study, uses inappropriate or performance degradation air conditioning system for building the time, the energy consumption in every year can increase by 30～50%, can learn the checking of energy device and the importance of performance diagnostic system.

Therefore, in order on the building of various forms, to guarantee failure-free operation and trouble diagnosibility, need a kind ofly can detect the also automatic checking of distributing and the diagnostic system of tracing trouble flexibly and effectively.

In order under the situation of energy savings, to use building most effectively, not only need building equipment is carried out optimization control, also to suitably estimate or detect to cause fault that equipment performance descends or the aging phenomenon that causes the gradual decline of systematic function, handle rapidly when taking some countermeasures in advance then or breaking down.But also need the prevention performance to descend, and guarantee the stability of a system, prevent that poor efficiency from using the energy and avoiding the deterioration of indoor environment.For make building as much as possible energy savings, guarantee comfortable indoor environment and reduce maintenance cost etc., should develop and a kind ofly connect building automation system and can estimate automatically in real time and the system of tracing trouble.

In view of this, the NIST of the U.S. has proposed a kind of rule-based air conditioner fault detection and diagnostic method.Existing household air-conditioner Rules of Assessment (APAR:AHU Performance AssessmentRule; Hereinafter to be referred as " APAR ") be a kind of failure diagnosis tool that detects the Expert Rules of being derived out based on air conditioner fault with the factors such as Temperature Distribution at control signal, energy equation, each position.Control signal decision operational mode by each position uses Expert Rules under each operational mode to judge whether fault of machinery or controller.

Rule-based existing air conditioner fault to America NI ST suggestion detects and diagnostic method (APAR: the household air-conditioner Rules of Assessment) further specify below.

" operational mode " at first, is described.Expert Rules during fault detection and diagnosis be applicable to installed greenhouse coil pipe (Heating coil), cold-room coil pipe (Cooling coil), energy-saving appliance (Economizer) with equipment and controller single for pipe variable air rate (Variable Air Volume) or decide air quantity (Constant Air Volume) air-conditioner.These Expert Rules mainly are at the temperature control of air-conditioner and the Temperature Distribution relation at each position.

The intake air temperature that the temperature controller of air-conditioner is supplied air inlet pressure fan rear end pipe arrangement is adjusted on the setting value.After extraneous air enters air-conditioner, mix, then by cooling-heating room coil pipe control temperature with circulating air in the building.In order when moving, to keep intake air temperature and to take a breath, according to season the operational mode of air-conditioner being divided into 4 types.Fig. 1 is 4 kinds of greenhouse coil pipe valve, cold-room coil pipe valve and mixing air damper graphs of a relation under the operational mode.Determine 4 kinds of operational modes by comprising inside and outside thermic load in interior various heat energy relations.Under the greenhouse pattern of pattern 1, by greenhouse coil pipe valve intake air temperature is adjusted to setting value in order to keep the greenhouse temperature, cold-room coil pipe valve then is in closure state.The aperture of mixing air damper is in the minimum aperture that can keep minimum ventilation state.

When the cold-room load increases, the operational mode of AHU will convert cold-room pattern-pattern 2 of utilizing outdoor air to from the greenhouse pattern.In pattern 2, cooling-heating room coil pipe valve is in closure state, regulates the mixing air damper for intake air temperature is maintained the cooling setpoint value.After the cold-room load increases, the mixing air damper will be opened fully and be static, switch to the mode 3 that belongs to mechanical type cold-room pattern then.When air-conditioner was in mechanical type cold-room pattern, by the cooling setpoint point is kept in the adjusting of cold-room coil pipe valve, greenhouse coil pipe valve was then closed.The outdoor air damper is then kept maximum or minimum state.

Mode 3 is the mechanical type cold-room district that the outdoor air damper is in 100% opening, and pattern 4 is mechanical type cold-room districts that the outdoor air damper is in minimum state.Fig. 2 is the operational mode graph of a relation that changes according to control signal and temperature.

Below " Expert Rules " further specified.Fault detection method is that Expert Rules with the assessment household air-conditioner is as the basis.

Rule has been used the qualitative model that concerns between indicated temperature measuring-signal and the control signal.AHU uses 4 kinds of operational modes, therefore need the rule that be applicable to each pattern be classified and set.Can be by the digital controlled signal decision operational mode of cooling-heating room coil pipe valve and air mixing damper.

In case set operational mode, just can mass-energy do not go out law and Temperature Distribution are the basis, use AHU control to generate needed rule with measuring-signal.

The first, under the greenhouse pattern, in order to make intake air temperature be adjusted to set point and to be kept, need to regulate the control valve of greenhouse coil pipe, cold-room coil pipe closure, the outdoor air damper is kept minimum position.Be based on the rule of measuring temperature below.

Rule 1:Tsa＜Tma+ Δ Tsf-Et

Rule 2:For|Tra-Toa| 〉=Δ Tmin:|Qoa/Qsa-(Qoa/Qsa) min|＞Ef

In the following formula, Tsa is an intake air temperature, Tma is the mixing air temperature, Δ Tsf is the temperature rise by the air inlet pressure fan, Tra is a circulating air temperature, Toa is an outside air temperature, Δ tmin is the minimum temperature difference feasible value that reclaims between air themperature and the outside air temperature, Qoa/Qsa is the outside air temperature ratio and can be expressed as temperature than (Tma-Tra)/(Toa-Tra), (Qoa/Qsa) min is the minimum acceptable value of outside air temperature ratio, Et is the thermometric error feasible value, and Ef is flow admissible error (function of thermometric error).

The incongruity of rule 1 expression intake air temperature and mixing air temperature, in the greenhouse pattern, intake air temperature should be higher than the mixing air temperature, because temperature rise can take place during by pressure fan, so intake air temperature should be higher than pressure fan temperature rise and mixing air temperature sum.Rule 2 is considered as fault to the too high or too low situations of outside air temperature that enter air-conditioner, in view of thermometric error, has only when the temperature difference (Tra-Toa) just to be suitable for this rule when exceeding admissible error.Et, Ef, Δ Tsf and Δ Tmin are the values that the operator sets in advance.Be rule below about control signal.

Rule 3:|uhc-1|≤Ehc and Tsa, s-Tsa 〉=Et

Rule 4:|uhc-1|≤Ehc

In the following formula, the greenhouse coil pipe valve control signal [0,1] that uhc is normalization, uhc=0 represents the valve closure state, uhc=1 represents 100% opening.Tsa, s are the intake air temperature setting values, and Ehc is the feasible value of greenhouse coil pipe control signal.

It is that 4～20mA or output voltage are that the analog signal output valve of 1～5Volt is regulated that the control signal of valve will be used output current according to controller type.At this moment, the complete closure state of greenhouse coil pipe valve or cold-room coil pipe valve is represented in the output of 4mA or 1Volt, and [0] in this specification promptly belongs to aforesaid state, and its meaning is identical with 0% output valve.The output valve of 20mA or 5Volt is then represented the complete opening state of greenhouse coil pipe valve or cold-room coil pipe valve, and [1] in this specification promptly belongs to aforesaid state, and its meaning is identical with 100% output valve.Therefore sign 0 can identify with [0,1] for convenience of understanding because the aforementioned way of output of each controller is different with 1 o'clock in air-conditioning system.

Although rule 3 has represented that greenhouse coil pipe valve is in a kind of runaway condition that maximum opening but can't be kept the air inlet design temperature.The state that rule 4 expressions should be noted that because other condition makes controlling value be in maximum.Ehc and Et are the values that the operator sets according to device characteristics.Should check the control signal of greenhouse coil pipe valve and mixing air damper at any time, cold-room coil pipe valve answers matching model 1 to keep closure state, and the mixing air damper also should be set the value that makes the outdoor air damper be in minimum state for.

The second, under the outdoor air refrigerating mode, make intake air temperature be adjusted to setting value by the mixing air damper, cold-room coil pipe and greenhouse coil pipe are in closure state.Pattern 2 regular as follows.

Rule 5:Toa＞Tsa, s-Δ Tsf+Et

Rule 6:Tsa＞Tra-Δ Trf+Et

Rule 7:|Tsa-Δ Tsf-Tma|＞Et

In the following formula, Δ Trf is the temperature rising value by the circulation pressure fan.Outside air temperature under rule 5 these patterns of expression is too high.Incongruity between rule 6 expression intake air temperature and the circulating air temperature.Intake air temperature should be lower than circulating air temperature and circulation pressure fan temperature rise sum.Incongruity between rule 7 expression intake air temperature and the mixing air temperature.Owing to do not use cold-room coil pipe and greenhouse coil pipe, intake air temperature should be higher than or be similar to mixing air temperature and air inlet pressure fan temperature rise sum.Et, Δ Tsf and Δ Trf are the values that the operator sets.

Three, under the state that outdoor air damper 100% is opened, carry out under the cold-room pattern of mechanical type cold-room, setting value by cold-room coil pipe valve regulation intake air temperature, the outdoor air damper of mixing air damper is in the maximum opening state, and greenhouse coil pipe valve is then closed.Mode 3 regular as follows.

Rule 8:Toa＜Tsa, s-Δ Tsf-Et

Rule 9:Toa＞Tco+Et

Rule 10:|Toa-Tma|＞Et

Rule 11:Tsa＞Tma+ Δ Tsf+Et

Rule 12.:Tsa＞Tra-Δ Trf+Et

In the following formula, Tco switches (change over) air themperature to pattern 4 from mode 3.Rule 8 expression outside air temperatures are too low and can't be suitable for mode 3, and 9 expressions of rule outside air temperatures are too high and can't be suitable for mode 3.Temperature incongruity between rule 10～rule 12 expression outside air temperatures and mixing air temperature, intake air temperature and mixing air temperature and intake air temperature and the circulating air temperature.Et, Δ Trf and Δ Tsf are the values that the operator sets.The rule 3 and 4 cold-room patterns that are adapted to equally based on the cold-room coil pipe, its rule is as follows.

Rule 13:|ucc-1|≤Ecc and Tsa, s-Tsa 〉=Et

Rule 14:|ucc-1|≤Ecc

In the following formula, the cold-room coil pipe valve control signal [0,1] that ucc is normalization, ucc=0 is a cold-room coil pipe valve closure state, and ucc=1 is cold-room coil pipe valve 100% opening, and Ecc is the feasible value of cold-room coil pipe control signal.

Although rule 13 expression cold-room coil pipe valves are in maximum opening and but can't keep the air inlet design temperature and higher a kind of runaway condition, though rule 14 expression intake air temperature are in permissible range, because the state that should be noted that near critical condition.Ecc and Et are that the operator sets value.

Four, be in minimum aperture and 100% utilize under the control model of mechanical type cold-room at the outdoor air damper, the outdoor air damper is in minimum position, uses cold-room coil pipe valve control intake air temperature.Pattern 4 regular as follows.

Rule 15:Toa＜Tco-Et

Rule 16:Tsa＞Tma+ Δ Tsf+Et

Rule 17:Tsa＞Tra-Δ Trf+Et

Rule 18:For|Tra-Toa| 〉=Δ Tmin:|Qoa/Qsa-(Qoa/Qsa) min|＞Ef

Rule 15 expression outside air temperatures are crossed low and are not met pattern 4.Incongruity between rule 16 and 17 expression intake air temperature and mixing air temperature and intake air temperature and the circulating air temperature.The extraneous air ratio that rule 18 expressions enter in the air-conditioner is too low.Et, Ef, Δ tmin, Δ Trf and Δ Tsf are the values that the operator sets.

Rule 13 and 14 is equally applicable to pattern 4, and its rule is as follows.

Rule 19:|ucc-1|≤Ecc and Tsa-Tsa, s 〉=Et

Rule 20:|ucc-1|≤Ecc

Explanation for rule 19 and 20 is equal to rule 13 and 14.

Five, be Expert Rules for the rule of the unknown inhabitation pattern based on the control signal of cold-room coil pipe valve, greenhouse coil pipe valve and mixing air damper.As long as meet following arbitrary rule, just be considered as malfunction.

Rule 21:ucc＞Ecc, uhc＞Ehc and Ed＜ud＜1-Ed

Rule 22:uhc＞Ehc and ucc＞Ecc

Rule 23:uhc＞Ehc and ud＞Ed

Rule 24:Ed＜ud＜1-Ed and ucc＞Ecc

In the following formula, the mixing air Damper Control signal [0,1] that ud is normalization, ud are to represent that the outdoor air damper was in closure state at 0 o'clock, and ud=1 represents to be in 100% opening.Ed is the feasible value of mixing air Damper Control signal.

The state that rule 21 expression mixing air dampers, cold-room coil pipe valve and greenhouse coil pipe valve are controlled simultaneously.The state that rule 22,23,24 valves of expression more than 2 or damper move simultaneously.Ecc, Ehc and Ed are that the operator sets value.

Six, be applicable to the rule of all inhabitation patterns, just be considered as fault as long as meet following condition.

Rule 25:|Tsa-Tsa, s|＞Et

Rule 26:Tma＜min (Tra, Toa)-Et

Rule 27:Tma＞max (Tra, Toa)+Et

Rule 25 expression intake air temperature can't be kept setting value, and the temperature of rule 26 and 27 expression mixing airs should be between the maximum and minimum of a value of outdoor air and circulating air temperature.Et is the value that the operator sets.As long as meet rule 3,13 or 19, just can meet regularly 25 simultaneously, this rule mainly is in order to check out the fault when not meeting aforementioned rule.

Seven, frequent pattern conversion may be due to the unstability that monitors control or field controller, checks that the pattern conversion in preset time can detect.

Rule 28: the mode conversion number＞MTmax of time per unit

In the following formula, Mtmax is that number of times is allowed in the pattern conversion of each preset time.

Fig. 3 is the rule list of each operational mode.Fig. 4 is the relevant operational mode and the employed signal relation figure of each rule.When analyzing different mutually operational modes, can find between a lot of rules interrelated.Sometimes the same rule of marquis goes for other pattern, as long as the marquis has changed pattern and will change relation sometimes.Fig. 4 is divided into relevant rule group to aforementioned rule.Employed sensor and control signal served as that the basis is distinguished when as shown in Figure 4, each rule group was with create-rule.Aforementioned rule group's (Group) typical case rule is as follows: with the cold-room pattern is example, and intake air temperature should be lower than the mixing air temperature, should be subjected to the influence of heat loss and rises in the temperature of pressure fan outlet.

Put the aforementioned rule that can be applicable to each operational mode respectively below in order.The rule that all these put in order out is as long as fault has taken place in eligible just being judged as.Fig. 5 can meet each regular dependent failure inventory.The rule that Fig. 5 put in order is not represented all failure situations, has just put the fault that can come out by rule detection in order, and has examined the influence that may bring when meeting each rule.Influence when up to specification comprises quality, energy, maintenance and the equipment life of comfortableness, inner air, more than one serious consequence may occur under some special situation.

Especially, the most important thing is the temperature value of key element in the key element of formation HVAC system.It is a very important ring that the temperature of indoor temperature and intake air temperature and so on is maintained particular value respectively.Therefore, what need most consideration in the fault diagnosis algorithm a bit is temperature sensor, and the fault diagnosis mode in the aforementioned APAR mode also is to be principal focal point with this part.

But, only depend on aforesaid existing APAR mode can't diagnose out all failure causes and the position of air-conditioning system exactly, it just checks out legal phenomenon of the failure, if find the reason of problem, also need be by other method.

That is to say that along with the air-conditioning equipment in modern times gets over complexity, equipment breaks down all the better easily, maintenance difficulties also improves day by day.Therefore, be applicable to that the fault detect of air-conditioner and diagnostic tool should take robust design adapting to various systems, but aforementioned APAR has only and just can be applied on the actual building after having examined parameters such as its diagnostic area and performance by simulation or laboratory installation.

Aforementioned rule-based existing air conditioner fault detects and diagnostic method (APAR) belongs to a plurality of Fault Estimation modes, that is to say after detecting fault according to the rule of appointment under each pattern of HVAC system operation, the fault more than 2 must be diagnosed out, therefore single failure can't be detected.

That is to say that employed all variablees all were considered as fault may take place when APAR method handle met fault judgement formula." A " key element (or variable) in the supposing the system breaks down and comes failure judgement by the APAR method now, because comprise that all relational expressions of " A " key element (or variable) all meet fault and judge formula, therefore when a key element in the system breaks down, can't find out this key element exactly, but many other key elements that comprise " A " key element all are considered as fault.

The result, when having a plurality of key elements to break down at the same time, the APAR inference mode that illustrates previously can carry out fault diagnosis, but have only " one " when key element breaks down, but being difficult to find out fault key element or trouble location fast and like clockwork and point out is which key element breaks down.For example, in the fault judgement formula that the rule 6,7 of pattern 2 is given, when in fact being Tsa fault (expression is measured the temperature sensor of Tsa and indicated fault), owing to met the fault judgement formula that aforementioned rule 6,7 is given, therefore will judge into Tsa, Tra and the whole faults of Tma variable or one of them or two faults, therefore for the fault of privileged site judge thicken inaccurate.

Summary of the invention

In order to solve aforesaid existing issue, the purpose of this invention is to provide a kind of signal that uses at a low price sensor and existing temperature sensor simply with the HVAC system held interchangeability of existing medium-and-large-sized building, thereby can apply to air-conditioning system method for diagnosing faults on the air-conditioning system of existing structure based on the sort-type rule.

Another object of the present invention provides a kind of checking and whether the diagnosis air-conditioning system can select pattern in each from the summer to the winter during fault in season, and then checks the operation factor air-conditioning system method for diagnosing faults based on the sort-type rule of fault whether under this pattern.

Another object of the present invention provides and has a kind ofly overcome the air-conditioning system method for diagnosing faults based on the sort-type rule that the APAR algorithm must be estimated the shortcoming of a plurality of faults by the single failure detection mode at specific factor.

In order to realize aforementioned purpose, the invention provides a kind of method for diagnosing faults based on the sort-type rule, be applicable to the air-conditioning system of forming by VAV damper, outdoor air damper, exhaust damper, outside air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor and central control unit, comprise the following steps:

The critical value that aforementioned central control unit needs during tracing trouble is appointed as the 1000th step of a constant;

The 2000th step of the measured value of aforementioned central control unit monitoring and acquisition aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor; And

Aforementioned central control unit is selected each pattern in season (pattern 1～4) according to the outside air temperature of measuring, be suitable for the parameter value that has configured at each pattern then, check whether fault of the element that turns round under this pattern, then the trouble shooting result is shown to operator's the 3000th step.

Description of drawings

Fig. 1 is greenhouse coil pipe valve, cold-room coil pipe valve and the mixing air damper graph of a relation of the existing following 4 kinds of operational modes of APAR mode.

Fig. 2 is the operational mode graph of a relation that changes according to control signal and temperature under the existing APAR mode.

Fig. 3 is the rule list of each operational mode under the existing APAR mode.

Fig. 4 is the relevant operational mode and the employed signal relation figure of each rule under the existing APAR mode.

Fig. 5 meets each regular bug list under the existing APAR mode.

Fig. 6 is an example structure figure of the air-conditioning system trouble-shooter based on the sort-type rule of the present invention.

Fig. 7 is an embodiment flow chart of the air-conditioning system trouble-shooter based on the sort-type rule of the present invention.

Fig. 8 is based on pattern 1 Troubleshooting Flowchart of the air-conditioning system method for diagnosing faults of sort-type rule among Fig. 7.

Fig. 9 is based on pattern 2 Troubleshooting Flowcharts of the air-conditioning system method for diagnosing faults of sort-type rule among Fig. 7.

Figure 10 a, 10b are based on the mode 3 Troubleshooting Flowchart of the air-conditioning system method for diagnosing faults of sort-type rule among Fig. 7.

Figure 11 is based on pattern 4 Troubleshooting Flowcharts of the air-conditioning system method for diagnosing faults of sort-type rule among Fig. 7.

The specific embodiment

Below in conjunction with drawings and Examples the air-conditioning system method for diagnosing faults based on the sort-type rule is further specified.

Fig. 6 is that one of the air-conditioning system trouble-shooter based on the sort-type rule of the present invention is implemented illustration.In the aforementioned embodiment, the air-conditioning system trouble-shooter based on the sort-type rule of the present invention comprises outside air temperature sensor 310, intake air temperature sensor 320, mixing air temperature sensor 330, circulating air temperature sensor 340, outdoor air reference temperature sensor 350 and central control unit 400.

After aforementioned compartment outer air temperature sensor 310 is measured outside air temperature measured value is outputed to aforementioned central control unit 400, aforementioned intake air temperature sensor 320 is measured intake air temperature measured value is outputed to aforementioned central control unit 400, after aforementioned mixing air temperature sensor 330 is measured the mixing air temperature measured value is outputed to aforementioned central control unit 400, after aforementioned circulating air temperature sensor 340 is measured circulating air temperature measured value is outputed to aforementioned central control unit 400, aforementioned compartment outer air reference temperature sensor 350 is in order to check that aforementioned compartment outer air temperature sensor 310 is whether unusual and the witness mark value outputs to aforementioned central control unit 400 to measured value then.

After aforementioned central control unit 400 obtains the measured value of aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor 310 to 350, especially after selecting pattern 1～4 in each according to the outside air temperature value of measuring in season, be suitable for the parameter value that has configured at each pattern, check whether single position fault has taken place, then the trouble shooting result is shown to the operator in the element that turns round under this pattern.

At this moment, aforementioned central control unit 400 uses moving average (Moving average) method to obtain aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor 310～350 measured values, has reduced the fault diagnosis mistake that is caused by measurement error value as far as possible.

Below in conjunction with Fig. 7 and embodiment the air-conditioning system method for diagnosing faults based on the sort-type rule of the present invention with aforementioned structure is further specified.

The critical value that needs when at first, aforementioned central control unit 400 is tracing trouble is appointed as a constant (S1000).Then, the measured value (S2000) of aforementioned central control unit 400 monitoring and acquisition aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor 310～350.At this moment, aforementioned central control unit 400 uses moving average method to obtain the measured value of aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor 310～350 in order to reduce error.

Then, aforementioned central control unit is selected each pattern in season (pattern 1～4) according to the outside air temperature value of measuring, be suitable for the parameter value that has configured at each pattern then, check whether single position fault has taken place in the element that turns round under this pattern, then the trouble shooting result is shown to operator (S3000).

That is to say that operation mode establishing method of the present invention is to set according to " outside air temperature value " fully.After at first selecting operation mode, be suitable for parameters such as damper maximum opening value, the minimum opening value of damper and cooling-heating room coil pipe valve error amount at each operation mode (pattern 1 is to pattern 4) again according to outside air temperature.

Concrete processing procedure to aforementioned the 3000th step (S3000) further specifies below.

At first, aforementioned central control unit 400 is with inspection chamber outer air temperature T _OAWhether meet following mathematical expression 2,, then present mode is made as pattern 1 (S3100) if meet (YES).Then, whether the element of aforementioned central control unit 400 checking modes 1 time running fault, then the trouble shooting result is shown to operator (S3200).

[mathematical expression 2]

T OA＜T OA，HT，set

In the following formula, T _OABe outside air temperature, T _{OA, HT, set}It is outdoor air greenhouse coil pipe design temperature.

Below in conjunction with Fig. 8 pattern 1 method for diagnosing faults of aforementioned S3200 step (S3200) is further specified.

At first, aforementioned central control unit 400 is with the aperture of inspection chamber outer air damper 60 100% closure (S3201) whether.In aforementioned the 3201st step (S3201), if the aperture of outdoor air damper 60 is not 100% closure (NO), aforementioned central control unit 400 will re-execute aforementioned the 3100th step (S3100); If closed (YES), then inspection chamber outer air temperature T _OAFault whether is if fault then is shown to operator (S3202) to its result.In aforementioned the 3202nd step (S3202), aforementioned central control unit 400 inspection chamber outer air temperature T _OAFault whether method is: be judged as when meeting following mathematical expression 1 normally, be judged as fault when not meeting.

[mathematical expression 1]

|T OA-T OA，ref|＜ε OA

In the following formula, T _OABe outside air temperature, T _{OA, ref}Be the outdoor air reference temperature, ε _OAIt is the feasible value of outside air temperature.

In aforementioned the 3202nd step (S3202), if outside air temperature T _OABe not fault, aforementioned central control unit 400 will be checked whether fault of greenhouse coil pipe 30, if fault then is shown to operator (S3203) to its result.In aforementioned the 3203rd step (S3203), aforementioned central control unit 400 check the greenhouse coil pipes whether the method for fault be: be judged as normally when meeting following mathematical expression 3, be judged as fault when not meeting.

[mathematical expression 3]

V HT，set＞0

In the following formula, V _{HT, set}It is greenhouse coil pipe output signal.

In aforementioned the 3203rd step (S3203), if greenhouse coil pipe 30 is not a fault, aforementioned central control unit 400 is just checked whether fault of mixing air temperature T ma, if fault then is shown to operator (S3204) to its result.In aforementioned the 3204th step (S3204), aforementioned central control unit 400 will check that mixing air temperature T ma fault whether method is: be judged as fault when meeting following mathematical expression 4, be judged as normal when not meeting.

In pattern 1, the present invention is the temperature factor T that contains mutual tool correlation more than two _OA, T _RAAnd T _MaRelational expression in common ground be judged as the fault factor.The reason that allows so to judge is: explanation as described above, the invention belongs to the algorithm that could accurately find out fault when having only single key element fault, and can't be suitable for the present invention as its prerequisite during with a plurality of key element simultaneous faults.Aforementioned content is equally applicable to pattern described later and judges.

But initial T therefore, _OADo not take place when unusual, aforementioned central control unit 400 will be in next diagnosis algorithm mixing air temperature T as the common factor of the 1st formula (left side) that meets following mathematical expression 4 simultaneously and the 2nd formula (right side) _MaBe judged as failure factor.

[mathematical expression 4]

$T_{\mathrm{SA}}<T_{\mathrm{ma}}-{\mathrm{\&epsiv;}}_t\mathrm{and}\left|\frac{T_{\mathrm{ma}}-T_{\mathrm{RA}}}{T_{\mathrm{OA}}-T_{\mathrm{RA}}}\right|>{\mathrm{\&epsiv;}}_f$

In the following formula, T _SABe intake air temperature, Tma is the mixing air temperature, and ε t is the thermometric error feasible value, T _OABe outside air temperature, TRA is a circulating air temperature.

At this moment, if the mixing air temperature T ma of aforementioned the 3204th step (S3204) is not a fault, aforementioned central control unit 400 will be checked intake air temperature T _SAFault whether.If fault then is shown to operator (S3205) to its result.In aforementioned the 3205th step (S3205), aforementioned central control unit 400 is checked intake air temperature T _SAFault whether method is: be judged as fault when meeting following mathematical expression 5, be judged as normal when not meeting.

[mathematical expression 5]

|u hc-1|＜ε hc?and|T SA，set-T SA|＞ε SA

In the following formula, T _SABe intake air temperature, T _{SA, set}Be the air inlet design temperature, ε _SABe the intake air temperature feasible value, ε _HcBe the tolerance factor of greenhouse coil pipe control signal, u _HcThe greenhouse coil pipe valve control signal [0,1] that is normalization.

In aforementioned the 3205th step (S3205), if intake air temperature T _SABe not fault, aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether is if fault then is shown to operator (S3206) to its result.In aforementioned the 3206th step (S3206), aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether method is: be judged as fault when meeting following mathematical expression 6, be judged as normal when not meeting.

From aforementioned process, can judge T _OA, T _Ma, and T _SAAbnormal factors.Therefore, aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether method is: be judged as fault when meeting following [mathematical expression 6], be judged as normal when not meeting.

[mathematical expression 6]

$\left|\frac{T_{\mathrm{ma}}-T_{\mathrm{RA}}}{T_{\mathrm{OA}}-T_{\mathrm{RA}}}\right|>{\mathrm{\&epsiv;}}_f$

In the following formula, T _MaBe the mixing air temperature, ε _fBe the error tolerances relevant with flow, T _OABe outside air temperature, T _RAIt is circulating air temperature.

In aforementioned the 3206th step (S3206), if circulating air temperature T _RABe not fault, aforementioned central control unit 400 after the information of 1 time normal operation of pattern, re-executes aforementioned the 2000th step (S2000) to operator's display system, and this is the S3207 step.That is to say, at T _OA, T _MaAnd T _SAWhen not having to meet the relational expression of aforementioned mathematical expression 6 under the unusual situation, expression circulating air temperature T _RAThe factor has occurred unusually.At last, if when the condition of aforementioned energy equation is not judged failure factor, the HVAC system can be considered as running well, and aforementioned central control unit 400 will re-execute initial data-gathering process.

In aforementioned the 3100th step (S3100), if not the operational mode that is equivalent to pattern 1 (N0), 400 inspection chamber outer air of aforementioned central control unit temperature T _OAWhether meet following mathematical expression 7,, then present mode is decided to be pattern 2 (S3300) if meet (YES).Then, whether the element of aforementioned central control unit 400 checking modes 2 times running fault, then the trouble shooting result is shown to operator (S3400).

[mathematical expression 7]

T OA，HT，set＜T OA＜T OA，cool，set

In the following formula, T _OABe outside air temperature, T _{OA, HT, set}Be outdoor air greenhouse coil pipe design temperature, T _{OA, cool, set}It is outdoor air cold-room coil pipe design temperature.

Below in conjunction with Fig. 9 pattern 2 method for diagnosing faults of aforementioned S3400 step (S3400) are further specified.

At first, aforementioned central control unit 400 is with inspection chamber outer air temperature T _OAFault whether is if fault then is shown to operator (S3401) to its result.In aforementioned the 3401st step (S3401), aforementioned central control unit 400 inspection chamber outer air temperature T _OAFault whether method is: be judged as normally during aforementioned mathematical expression 1, be judged as fault when not meeting.

In aforementioned the 3401st step (S3401), if outside air temperature T _OABe not fault, aforementioned central control unit 400 will be checked air inlet design temperature T _{SA, set}Fault whether, if fault, (Reset) air inlet design temperature T then resets earlier _{SA, set}, then its result is shown to operator (S3402).In aforementioned the 3402nd step (S3402), aforementioned central control unit 400 is checked air inlet design temperature T _{SA, set}Fault whether method is: be judged as fault when meeting following mathematical expression 8, be judged as normal when not meeting.

[mathematical expression 8]

?T OA＞T SA，set+ε t

In the following formula, T _OABe outside air temperature, T _{SA, set}Be the air inlet design temperature, ε _tIt is the thermometric error feasible value.

In aforementioned the 3402nd step (S3402), if air inlet design temperature T _{SA, set}Be not fault, aforementioned central control unit 400 will be checked intake air temperature T _SAFault whether is if fault then is shown to operator (S3403) to its result.In aforementioned the 3403rd step (S3403), aforementioned central control unit 400 is checked intake air temperature T _SAFault whether method is: be judged as fault when meeting following mathematical expression 9, be judged as normal when not meeting.That is to say, can use the 1st formula of mathematical expression 9 and the 2nd formula to detect the intake air temperature T that meets aforementioned two relational expressions simultaneously _SAFailure factor, because just can be judged as fault when having only the 1st formula that meets mathematical expression 9 simultaneously and the 2nd formula, therefore can be the 1st formula and the common intake air temperature T of the 2nd formula _SAThe factor is judged as unusually.

[mathematical expression 9]

T SA＞T RA+ε t?and |T SA-T ms|＞ε t

In the following formula, T _SABe intake air temperature, T _RABe circulating air temperature, ε t is the thermometric error feasible value, T _MaIt is the mixing air temperature.

In aforementioned the 3403rd step (S3403), if intake air temperature T _SABe not fault, aforementioned central control unit 400 will be checked circulating air temperature T _RAFault whether is if fault then is shown to operator (S3404) to its result.In aforementioned the 3404th step (S3404), aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether method is: be judged as fault when meeting following mathematical expression 10, be judged as normal when not meeting.

[mathematical expression 10]

T SA＞T RA+ε t

In the following formula, T _SABe intake air temperature, T _RABe circulating air temperature, ε _tIt is the thermometric error feasible value.

In aforementioned the 3404th step (S3404), if circulating air temperature T _RABe not fault, aforementioned central control unit 400 is just checked whether fault of mixing air temperature T ma, if fault then is shown to operator (S3405) to its result.In aforementioned the 3405th step (S3405), aforementioned central control unit 400 checks that mixing air temperature T ma fault whether method is: be judged as fault when meeting following mathematical expression 11, be judged as normal when not meeting.

[mathematical expression 11]

|T SA-T ma|＞ε t

In the following formula, T _SABe intake air temperature, T _MaBe the mixing air temperature, ε _tIt is the thermometric error feasible value.

In aforementioned the 3405th step (S3405), if mixing air temperature T ma is not a fault, aforementioned central control unit 400 after the information of 2 times normal operations of pattern, re-executes aforementioned the 2000th step (S2000) to operator's display system, and this is the S3406 step.

In aforementioned the 3300th step (S3300), if not the operational mode that is equivalent to pattern 2 (NO), 400 inspection chamber outer air of aforementioned central control unit temperature T _OAWhether meet following mathematical expression 12,, then present mode is made as mode 3 (S3500) if meet (YES).Then, whether the element of aforementioned central control unit (400) checking mode 3 times running fault, then the trouble shooting result is shown to operator (S3600).

[mathematical expression 12]

T OA，cool，set＜T OA＜T OA，cool，min，set

In the following formula, T _OABe outside air temperature, T _{OA, cool, set}Be outdoor air cold-room coil pipe design temperature, T _{OA, cool, min, set}It is the lowest set temperature of outdoor air cold-room coil pipe.

Below in conjunction with Figure 10 a and Figure 10 b the mode 3 method for diagnosing faults of aforementioned S3600 step (S3600) is further specified.

At first, aforementioned central control unit 400 is with the aperture of inspection chamber outer air damper 60 100% closure (S3601) whether.If the aperture of outdoor air damper 60 is not 100% closure (NO), then re-execute aforementioned the 3100th step (S3100).If closed (YES), then inspection chamber outer air temperature T _OAFault whether is if fault then is shown to operator (S3602) to its result.In aforementioned the 3602nd step (S3602), aforementioned central control unit 400 inspection chamber outer air temperature T _OAFault whether method is: be judged as normally during aforementioned mathematical expression 1, be judged as fault when not meeting.

In aforementioned the 3602nd step (S3602), if outside air temperature T _OABe not fault, aforementioned central control unit 400 will be checked whether fault of greenhouse coil pipe 30, if fault is then carried out aforementioned the 3200th step (S3200), this is the S3603 step.In aforementioned the 3603rd step mule (S3603), aforementioned central control unit 400 checks that greenhouse coil pipe fault whether methods are: be judged as normally during aforementioned mathematical expression 3, be judged as fault when not meeting.

In aforementioned the 3603rd step (S3603), if greenhouse coil pipe 30 is not a fault, aforementioned central control unit 400 reexamines outside air temperature T _OAFault whether is if fault then is shown to operator (S3604) to its result.In aforementioned the 3604th step (S3604), the outside air temperature T that aforementioned central control unit 400 is checked when the greenhouse coil pipe does not have output signal _OAFault whether method is: be judged as fault when meeting following mathematical expression 13, be judged as normal when not meeting.

[mathematical expression 13]

T OA＜T SA，set-ΔT SF-ε t?and T OA＞T CO+ε t?and |T OA-T ma|＞ε t

In the following formula, T _OABe outside air temperature, T _{SA, set}Be the air inlet design temperature, Δ T _SFBe temperature rise by the air inlet pressure fan, ε _tBe the thermometric error feasible value, T _COBe the temperature that switches to pattern 4 from mode 3, T _MaIt is the mixing air temperature.

In aforementioned the 3604th step (S3604), if outside air temperature T _OABe not fault, aforementioned central control unit 400 is checked the temperature T that switches to pattern 4 from mode 3 _COFault whether is if fault then is shown to operator (S3605) to its result.In aforementioned the 3605th step (S3605), aforementioned central control unit 400 is at outside air temperature T _OAJust often look into the temperature T that switches to pattern 4 from mode 3 _COThe method of fault is: be judged as fault when meeting following mathematical expression 14, be judged as normal when not meeting.At this moment, switching temperature T _COTemperature value be not measured value but designated value, therefore need judge by the operator or the expert of air-conditioning system.

[mathematical expression 14]

T OA＞T CO+ε t

In the following formula, T _OABe outside air temperature, ε _tBe the thermometric error feasible value, T _COIt is the temperature that switches to pattern 4 from mode 3.

In aforementioned the 3605th step (S3605), if switch to the temperature T of pattern 4 from mode 3 _COBe not fault, aforementioned central control unit 400 is just checked whether fault of mixing air temperature T ma, if fault then is shown to operator (S3606) to its result.In aforementioned the 3606th step (S3606), aforementioned central control unit 400 checks that mixing air temperature T ma fault whether method is: be judged as fault when meeting following mathematical expression 15, be judged as normal when not meeting.

[mathematical expression 15]

|T OA-T ma|＞ε t

In the following formula, T _OABe outside air temperature, ε _tBe the thermometric error feasible value, T _MaIt is the mixing air temperature.

In aforementioned the 3606th step (S3606), if mixing air temperature T ma is not a fault, aforementioned central control unit 400 will be checked intake air temperature T _SAFault whether is if fault then is shown to operator (S3607) to its result.In aforementioned the 3607th step (S3607), aforementioned central control unit 400 is checked intake air temperature T _SAFault whether method is: be judged as fault when meeting following mathematical expression 16, be judged as normal when not meeting.That is to say, when meeting all relational expressions of 16 li of following mathematical expressions simultaneously, can be intake air temperature T _SABe judged as fault.

[mathematical expression 16]

T SA＞T ma+ΔT SF+ε t?and T SA＞T RA-ΔT SF+ε t?and |u CC-1|≤ε CC?and?T? SA-T SA，set≥ε t

In the following formula, T _SABe intake air temperature, T _MaBe the mixing air temperature, Δ T _SFBe temperature rise by the air inlet pressure fan, ε _tBe the thermometric error feasible value, T _RABe circulating air temperature, u _CCThe cold-room coil pipe valve control signal [0,1] that is normalization, ε _CCBe the tolerance factor of cold-room coil pipe control signal, T _{SA, set}It is the air inlet design temperature.

In aforementioned the 3607th step (S3607), if intake air temperature T _SABe not fault, aforementioned central control unit 400 will reexamine the temperature T that switches to pattern 4 from mode 3 _COFault whether is if fault then is shown to operator (S3608) to its result.In aforementioned the 3608th step (S3608), aforementioned central control unit 400 is at outside air temperature T _OA, the mixing air temperature T _MaAnd intake air temperature T _SAJust often check the temperature T that switches to pattern 4 from mode 3 _COFault whether method is: be judged as fault when meeting following mathematical expression 17, be judged as normal when not meeting.

[mathematical expression 17]

T SA＞T ma+ΔT SF+ε t

In the following formula, T _SABe intake air temperature, T _MaBe the mixing air temperature, Δ T _SFBe temperature rise by the air inlet pressure fan, ε _tIt is the thermometric error feasible value.

In aforementioned the 3608th step (S3608), if switch to the temperature T of pattern 4 from mode 3 _COBe not fault, aforementioned central control unit 400 will be checked circulating air temperature T _RAFault whether is if fault then is shown to operator (S3609) to its result.In aforementioned the 3609th step (S3609), aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether method is: be judged as fault when meeting following mathematical expression 18, be judged as normal when not meeting.That is to say, at intake air temperature T _SAWhen not having to meet mathematical expression 18 under the situation of fault, expression circulating air temperature T _RAFault has taken place.

[mathematical expression 18]

T SA＞T RA-ΔT SF+ε t

In the following formula, T _SABe intake air temperature, T _RABe circulating air temperature, Δ T _SFBe temperature rise by the air inlet pressure fan, ε _tIt is the thermometric error feasible value.

In aforementioned the 3609th step (S3609), if circulating air temperature T _RABe not fault, aforementioned central control unit 400 will check normalization cold-room coil pipe valve control signal [0,1] (u _CC) fault whether, if fault then is shown to operator (S3610) to its result.In aforementioned the 3610th step (S3610), aforementioned central control unit 400 check normalization cold-room coil pipe valve control signal [0,1] (u _CC) be fault whether method: be judged as fault when meeting following mathematical expression 19, be judged as normal when not meeting.

[mathematical expression 19]

|u CC-1|≤ε CC?and T SA-T SA，set≥ε t

In the following formula, u _CCThe cold-room coil pipe valve control signal [0,1] that is normalization, ε _CCBe the tolerance factor of cold-room coil pipe control signal, T _SABe intake air temperature, T _{SA, set}Be the air inlet design temperature, ε _tIt is the thermometric error feasible value.

In aforementioned the 3610th step (S3610), if normalization cold-room coil pipe valve control signal [0,1] (u _CC) not fault, aforementioned central control unit 400 after the information of normal operation under the mode 3, re-executes aforementioned the 2000th step (S2000) to operator's display system, and this is the S3611 step.

In aforementioned the 3500th step (S3500), if not the operational mode that is equivalent to mode 3 (NO), 400 inspection chamber outer air of aforementioned central control unit temperature T _OAWhether meet following mathematical expression 20,, then present mode is made as pattern 4 (S3700) if meet (YES).Then, whether the element of aforementioned central control unit 400 checking modes 4 times running fault, and the trouble shooting result is shown to operator (S3800).

[mathematical expression 20]

T OA，cool，min，set＜T OA

In the following formula, T _OABe outside air temperature, T _{OA, cool, min, set}It is the lowest set temperature of outdoor air cold-room coil pipe.

Below in conjunction with Figure 11 pattern 4 method for diagnosing faults of aforementioned S3800 step (S3800) are further specified.

At first, the aperture of aforementioned central control unit 400 inspection chamber outer air dampers 60 100% closure (S3801) whether.

In aforementioned the 3801st step (S3801), if the aperture of outdoor air damper 60 is not 100% closure (NO), aforementioned central control unit 400 will re-execute aforementioned the 3100th step (S3100).If closure state (YES), then inspection chamber outer air temperature T _OAFault whether is if fault then is shown to operator (S3802) to its result.In aforementioned the 3802nd step (S3802), aforementioned central control unit 400 inspection chamber outer air temperature T _OAFault whether method is: be judged as normally during aforementioned mathematical expression 1, be judged as fault when not meeting.

In aforementioned the 3802nd step (S3802), if outside air temperature (T _OA) not fault, aforementioned central control unit 400 will be checked the temperature T that switches to pattern 4 from mode 3 _COFault whether is if fault then is shown to operator (S3803) to its result.In aforementioned the 3803rd step (S3803), aforementioned central control unit 400 is at outside air temperature T _OAJust often check the temperature T that switches to pattern 4 from mode 3 _COFault whether method is: be judged as fault when meeting following [mathematical expression 21], be judged as normal when not meeting.

[mathematical expression 21]

T OA＜T CO-ε t

In the following formula, T _OABe outside air temperature, T _COBe the temperature that switches to pattern 4 from mode 3, ε _tIt is the thermometric error feasible value.

In aforementioned the 3803rd step (S3803), if switch to the temperature T of pattern 4 from mode 3 _COBe not fault, aforementioned central control unit 400 will be checked intake air temperature T _SAFault whether is if fault then is shown to operator (S3804) to its result.In aforementioned the 3804th step (S3804), aforementioned central control unit 400 is checked intake air temperature T _SAFault whether method is: be judged as fault when meeting following mathematical expression 22, be judged as normal when not meeting.Mathematical expression 22 comprises the 1st formula, the 2nd formula and the 3rd formula, has only met aforementioned three relational expressions and just can be judged as fault, therefore three intake air temperature T that relational expression is common _SABe judged as unusual.

[mathematical expression 22]

T SA＞T ma+ΔT SF+ε t?and T SA＞T RA-ΔT SF+ε t?and |u CC-1|≤ε CC?and?T SA-T SA，set≥ε t

In the following formula, T _SABe intake air temperature, T _MaBe the mixing air temperature, Δ T _SFBe temperature rise by the air inlet pressure fan, ε _tBe the thermometric error feasible value, T _RABe circulating air temperature, u _CCBe to meet the cold-room coil pipe valve control signal of having changed [0,1], ε _CCBe the tolerance factor of cold-room coil pipe control signal, T _{SA, set}It is the air inlet design temperature.

In aforementioned the 3804th step (S3804), if intake air temperature T _SANot fault, 400 diagnosis of aforementioned central control unit mixing air temperature T _MaFault whether is if fault then is shown to operator (S3805) to its result.In aforementioned the 3805th step (S3805), aforementioned central control unit 400 checks that mixing air temperature T ma fault whether method is: be judged as fault when meeting following mathematical expression 23, be judged as normal when not meeting.

[mathematical expression 23]

T SA＞T ma+ΔT SF+ε t

In the following formula, T _SABe intake air temperature, T _MaBe the mixing air temperature, Δ T _SFBe temperature rise by the air inlet pressure fan, ε _tIt is the thermometric error feasible value.

In aforementioned the 3805th step (S3805), if mixing air temperature T ma is not a fault, aforementioned central control unit 400 will be checked circulating air temperature T _RAFault whether is if fault then is shown to operator (S3806) to its result.In aforementioned the 3806th step (S3806), aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether method is: be judged as fault when meeting following mathematical expression 24, be judged as normal when not meeting.

[mathematical expression 24]

T SA＞T RA-ΔT SF

In the following formula, T _SABe intake air temperature, T _RABe circulating air temperature, Δ T _SFIt is temperature rise by the air inlet pressure fan.

In aforementioned the 3806th step (S3806), if circulating air temperature T _RABe not fault, aforementioned central control unit 400 reexamines circulating air temperature T _RAFault whether is if fault then is shown to operator (S3807) to its result.In aforementioned the 3807th step (S3807), aforementioned central control unit 400 is checked circulating air temperature T _RAFault whether method is: be judged as fault when meeting following mathematical expression 25, be judged as normal when not meeting.

[mathematical expression 25]

$\mathrm{for}|T_{\mathrm{RA}}-T_{\mathrm{OA}}|\&GreaterEqual;{\mathrm{\&Delta;T}}_{\min },\left|\frac{T_{\mathrm{ma}}-T_{\mathrm{RA}}}{T_{\mathrm{OA}}-T_{\mathrm{RA}}}\right|>{\mathrm{\&epsiv;}}_f$

In the following formula, T _RABe circulating air temperature, T _OABe outside air temperature, Δ tmin is the minimum temperature difference feasible value of circulating air and outside air temperature, T _MaBe the mixing air temperature, ε _fBe the error tolerances relevant with flow.

In aforementioned the 3807th step (S3807), if circulating air temperature T _RABe not fault, aforementioned central control unit 400 after the information of 4 times normal operations of pattern, re-executes aforementioned the 2000th step (S2000) to operator's display system, and this is the S3808 step.

The present invention can be applicable to the industry scene apace, helps the conception that provides brand-new of establishing for the parsing of building design of automatic control system, operation, stability and design for the basic understanding in these fields.If these core technologies are applied to the automatic control or the domestic network system of building, can be by project development risk investment causes such as software development or measurement mechanism exploitations.

Though the present invention only has been described in detail at top several embodiment, but in technological thought category of the present invention, various distortion and modification can appear, therefore this is very tangible same industry personage, and to belong to claim scope of the present invention be natural for this distortion and modification.

The invention effect

Such as above stated specification, the air-conditioning system fault detection and diagnosis side based on the sort-type rule of the present invention The device of method and suitable the method has overcome existing APAR algorithm because need to estimate a plurality of faults Problem that can't clear and definite specified fault position, can carry out single for specific factor at short notice so Barrier detects operation, and then maintains immediately, has significantly reduced the operating cost of building, can Take Corresponding Countermeasures with the old equipment for each key element effectively, can also the mitigation system operator Tired.

Air-conditioning system fault detection and diagnosis method and suitable being somebody's turn to do based on the sort-type rule of the present invention The device of method carries out temperature survey and installs at a low price passing for the privileged site that consists of the HVAC system The device such as sensor is also collected the operation information of building required element when carrying out cooling-heating room, overcomes Can only be applicable to the shortcoming based on model fault detection and diagnosis method of specific buildings or system, Can be common to the fault detection and diagnosis purposes of medium-and-large-sized building.

Claims (10)

1. the single position of the air-conditioning system based on sort-type rule method for diagnosing faults, be applicable to the air-conditioning system of forming by VAV damper (50), outdoor air damper (60), exhaust damper (70), outside air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor (310～350) and central control unit (400), comprise the following steps:

The critical value that aforementioned central control unit (400) needs during tracing trouble is appointed as the 1000th step (S1000) of certain constant;

The 2000th step (S2000) of aforementioned central control unit (400) monitoring and acquisition aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor (310～350) measured value; And

It is that pattern 1 is to pattern 4 that aforementioned central control unit is selected each pattern according to the outside air temperature value of measuring in season, be suitable for the parameter value that has configured at each pattern then, check whether the element that turns round under this pattern fault has taken place, then the trouble shooting result is shown to operator's the 3000th step (S3000).

2. the single position of the air-conditioning system based on the sort-type rule according to claim 1 method for diagnosing faults is characterized in that:

In aforementioned the 2000th step (S2000), aforementioned central control unit (400) uses moving average method to obtain the measured value of aforementioned compartment outer air temperature sensor, outdoor air reference temperature sensor, intake air temperature sensor, mixing air temperature sensor and circulating air temperature sensor (310～350).

3. the single position of the air-conditioning system based on the sort-type rule according to claim 1 method for diagnosing faults is characterized in that:

Aforementioned the 3000th step (S3000) comprises the following steps:

Aforementioned central control unit (400) is checked outside air temperature (T _OA) whether meet following mathematical expression 2, if meet, then present mode is made as the 3100th step (S3100) of pattern 1; And

Whether the element of aforementioned central control unit (400) checking mode 1 time running fault, then the trouble shooting result is shown to operator's the 3200th step (S3200);

[mathematical expression 2]

T _OA＜T _{OA，HT，set}

In the following formula, T _OABe outside air temperature, T _{OA, HT, set}It is outdoor air greenhouse coil pipe design temperature.

4. the single position of the air-conditioning system based on the sort-type rule according to claim 3 method for diagnosing faults is characterized in that:

Aforementioned the 3200th step (S3200) comprises the following steps:

Whether the aperture of aforementioned central control unit (400) inspection chamber outer air damper (60) is the 3201st step (S3201) of 100% closure;

If the aperture of outdoor air damper (60) is not 100% closure in aforementioned the 3201st step (S3201), aforementioned central control unit (400) will re-execute aforementioned the 3100th step; If closed, then check outside air temperature (T _OA) fault whether, if fault, then its result is shown to operator's the 3202nd step (S3202);

If outside air temperature (T in aforementioned the 3202nd step _OA) not fault, aforementioned central control unit (400) is checked whether fault of greenhouse coil pipe (30), if fault, then its result is shown to operator's the 3203rd step (S3203);

If greenhouse coil pipe (30) is not a fault in aforementioned the 3203rd step (S3203), aforementioned central control unit (400) is checked mixing air temperature (T _Ma) fault whether, if fault, then its result is shown to operator's the 3204th step (S3204);

If mixing air temperature (Tma) is not a fault in aforementioned the 3204th step (S3204), aforementioned central control unit (400) is checked intake air temperature (T _SA) fault whether, if fault, then its result is shown to operator's the 3205th step (S3205);

If intake air temperature (T in aforementioned the 3205th step (S3205) _SA) not fault, aforementioned central control unit (400) is checked circulating air temperature (T _RA) fault whether, if fault, then its result is shown to operator's the 3206th step (S3206); And

If circulating air temperature (T in aforementioned the 3206th step (S3206) _RA) not fault, aforementioned central control unit (400) after the information of 1 time normal operation of pattern, re-executes the 3207th step (S3207) of aforementioned the 2000th step (S2000) to operator's display system.

5. the single position of the air-conditioning system based on the sort-type rule according to claim 3 method for diagnosing faults is characterized in that:

Also comprise the following steps:

If be not the operational mode that is equivalent to pattern 1 in aforementioned the 3100th step (S3100), aforementioned central control unit (400) is checked outside air temperature (T _OA) whether meet following mathematical expression 7, if meet, then present mode is decided to be the 3300th step (S3300) of pattern 2; And

Aforementioned central control unit (400) is checked in the element of 2 times runnings of pattern fault whether, then the trouble shooting result is shown to operator's the 3400th step (S3400);

[mathematical expression 7]

T _{OA，HT，set}＜T _OA＜T _{OA，cool，set}

In the following formula, T _OABe outside air temperature, T _{OA, HT, set}Be outdoor air greenhouse coil pipe design temperature, T _{OA, cool, set}It is outdoor air cold-room coil pipe design temperature.

6. the single position of the air-conditioning system based on the sort-type rule according to claim 5 method for diagnosing faults is characterized in that:

Aforementioned the 3400th step (S3400) comprises the following steps:

Aforementioned central control unit (400) is checked outside air temperature (T _OA) fault whether, if fault, then its result is shown to operator's the 3401st step (S3401);

If outside air temperature (T in aforementioned the 3401st step (S3401) _OA) not fault, aforementioned central control unit (400) is checked air inlet design temperature (T _{SA, set}) fault whether, if fault, then first replacement air inlet design temperature (T _{SA, set}), then its result is shown to operator's the 3402nd step (S3402);

If air inlet design temperature (T in aforementioned the 3402nd step (S3402) _{SA, set}) not fault, aforementioned central control unit (400) is checked intake air temperature (T _SA) fault whether, if fault, then its result is shown to operator's the 3403rd step (S3403);

In aforementioned the 3403rd step (S3403), if intake air temperature (T _SA) not fault, aforementioned central control unit (400) is checked circulating air temperature (T _RA) fault whether, if fault, then its result is shown to operator's the 3404th step (S3404);

If circulating air temperature (T in aforementioned the 3404th step (S3404) _RA) not fault, aforementioned central control unit (400) is checked mixing air temperature (T _Ma) fault whether, if fault, then its result is shown to operator's the 3405th step (S3405); And

If mixing air temperature (Tma) is not a fault in aforementioned the 3405th step (S3405), aforementioned central control unit (400) after the information of 2 times normal operations of pattern, re-executes the 3406th step (S3406) of aforementioned the 2000th step (S2000) to operator's display system.

7. the single position of the air-conditioning system based on the sort-type rule according to claim 5 method for diagnosing faults is characterized in that:

Also comprise the following steps:

If be not the operational mode that is equivalent to pattern 2 in aforementioned the 3300th step (S3300), aforementioned central control unit (400) is checked outside air temperature (T _OA) whether meet following mathematical expression 12, if meet, then present mode is made as the 3500th step (S3500) of mode 3; And

Aforementioned central control unit (400) is checked whether fault of the element turn round under mode 3, then the trouble shooting result is shown to operator's the 3600th step (S3600);

[mathematical expression 12]

T _{OA，cool，set}＜T _OA＜T _{OA，cool，min，set}

In the following formula, T _OABe outside air temperature, T _{OA, cool, set}Be outdoor air cold-room coil pipe design temperature, T _{OA, cool, min, set}It is the lowest set temperature of outdoor air cold-room coil pipe.

8. the single position of the air-conditioning system based on the sort-type rule according to claim 7 method for diagnosing faults is characterized in that:

Aforementioned the 3600th step (S3600) comprises the following steps:

Whether the aperture of aforementioned central control unit (400) inspection chamber outer air damper (60) is the 3601st step (S3601) of 100% closure;

If the aperture of outdoor air damper (60) is not 100% closure (NO) in aforementioned the 3601st step (S3601), aforementioned central control unit (400) re-executes aforementioned the 3100th step (S3100); If closed (YES) then checks outside air temperature (T _OA) fault whether, if fault, then its result is shown to operator's the 3602nd step (S3602);

If outside air temperature (T in aforementioned the 3602nd step (S3602) _OA) not fault, aforementioned central control unit (400) is checked whether fault of greenhouse coil pipe (30), if fault, then carries out (S3603) step of aforementioned the 3200th step (S3200);

If greenhouse coil pipe (30) is not a fault in aforementioned the 3603rd step (S3603), aforementioned central control unit (400) reexamines outside air temperature (T _OA) fault whether, if fault, then its result is shown to operator's the 3604th step (S3604);

If outside air temperature (T in aforementioned the 3604th step (S3604) _OA) not fault, aforementioned central control unit (400) is checked the temperature (T that switches to pattern 4 from mode 3 _CO) fault whether, if fault, then its result is shown to operator's the 3605th step (S3605);

If in aforementioned the 3605th step (S3605), switch to the temperature (T of pattern 4 from mode 3 _CO) not fault, aforementioned central control unit (400) is checked mixing air temperature (T _Ma) fault whether, if fault, then its result is shown to operator's the 3606th step (S3606);

If mixing air temperature (T in aforementioned the 3606th step (S3606) _Ma) not fault, aforementioned central control unit (400) is checked intake air temperature (T _SA) fault whether, if fault, then its result is shown to operator's the 3607th step (S3607);

If intake air temperature (T in aforementioned the 3607th step (S3607) _SA) not fault, aforementioned central control unit (400) reexamines the temperature (T that switches to pattern 4 from mode 3 _CO) fault whether, if fault, then its result is shown to operator's the 3608th step (S3608);

If in aforementioned the 3608th step (S3608), switch to the temperature (T of pattern 4 from mode 3 _CO) not fault, aforementioned central control unit (400) is checked circulating air temperature (T _RA) fault whether, if fault, then its result is shown to operator's the 3609th step (S3609);

If circulating air temperature (T in aforementioned the 3609th step (S3609) _RA) not fault, aforementioned central control unit (400) is checked by cold-room coil pipe valve control signal [0, the 1] (u of normalization _CC) fault whether, if fault, then its result is shown to operator's the 3610th step (S3610); And

If in aforementioned the 3610th step (S3610) by cold-room coil pipe valve control signal [0, the 1] (u of normalization _CC) not fault, aforementioned central control unit (400) after the information of normal operation under the mode 3, re-executes the 3611st step (S3611) of aforementioned the 2000th step (S2000) to operator's display system.

9. the single position of the air-conditioning system based on the sort-type rule according to claim 7 method for diagnosing faults is characterized in that:

Also comprise the following steps:

If be not the operational mode that is equivalent to mode 3 in aforementioned the 3500th step (S3500), aforementioned central control unit (400) is checked outside air temperature (T _OA) whether meet following mathematical expression 20, if meet, then present mode is made as the 3700th step (S3700) of pattern 4; And

Aforementioned central control unit (400) is checked in the element of 4 times runnings of pattern fault whether, then the trouble shooting result is shown to operator's the 3800th step (S3800);

[mathematical expression 20]

T _{OA，cool，min，set}＜T _OA

In the following formula, T _OABe outside air temperature, T _{OA, cool, min, set}It is the lowest set temperature of outdoor air cold-room coil pipe.

10. the single position of the air-conditioning system based on the sort-type rule according to claim 9 method for diagnosing faults is characterized in that:

Aforementioned the 3800th step (S3800) comprises the following steps:

Whether the aperture of aforementioned central control unit (400) inspection chamber outer air damper (60) is the 3801st step (S3801) of 100% closure;

If the aperture of outdoor air damper (60) is not 100% closure (NO) in aforementioned the 3801st step (S3801), aforementioned central control unit (400) re-executes aforementioned the 3100th step (S3100); If closed (YES) then checks outside air temperature (T _OA) fault whether, if fault, then its result is shown to operator's the 3802nd step (S3802);

If outside air temperature (T in aforementioned the 3802nd step (S3802) _OA) not fault, aforementioned central control unit (400) is checked the temperature (T that switches to pattern 4 from mode 3 _CO) fault whether, if fault, then its result is shown to operator's the 3803rd step (S3803);

If in aforementioned the 3803rd step (S3803), switch to the temperature (T of pattern 4 from mode 3 _CO) not fault, aforementioned central control unit (400) is checked intake air temperature (T _SA) fault whether, if fault, then its result is shown to operator's the 3804th step (S3804);

If intake air temperature (T in aforementioned the 3804th step (S3804) _SA) not fault, aforementioned central control unit (400) is checked mixing air temperature (T _Ma) fault whether, if fault, then its result is shown to operator's the 3805th step (S3805);

If mixing air temperature (T in aforementioned the 3805th step (S3805) _Ma) not fault, aforementioned central control unit (400) is checked circulating air temperature (T _RA) fault whether, if fault, then its result is shown to operator's the 3806th step (S3806);

If circulating air temperature (T in aforementioned the 3806th step (S3806) _RA) not fault, aforementioned central control unit (400) reexamines circulating air temperature (T _RA) fault whether, if fault, then its result is shown to operator's the 3807th step (S3807); And

If circulating air temperature (T in aforementioned the 3807th step (S3807) _RA) not fault, aforementioned central control unit (400) after the information of 4 times normal operations of pattern, re-executes the 3808th step (S3808) of aforementioned the 2000th step (S2000) to operator's display system.

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