CN104566817A - System and method for monitoring temperature stress of air conditioner - Google Patents
System and method for monitoring temperature stress of air conditioner Download PDFInfo
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- CN104566817A CN104566817A CN201410835723.3A CN201410835723A CN104566817A CN 104566817 A CN104566817 A CN 104566817A CN 201410835723 A CN201410835723 A CN 201410835723A CN 104566817 A CN104566817 A CN 104566817A
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- temperature
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- conditioner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention discloses a system and a method for monitoring a temperature stress of an air conditioner. The method includes the steps: acquiring operating parameters of an IPM (intelligent power module) of an outdoor unit and/or the environment temperature and the temperature of the outdoor unit at a preset time interval; calculating difference between the environment temperature and the temperature of the outdoor unit, and calculating junction temperature of the IPM according to the operating parameters; accumulating operating time of the outdoor unit when the outdoor unit operates at the junction temperature and/or when the temperature difference exceeds a temperature threshold, judging whether the accumulated operating time is longer than preset temperature stress release time or not, and if yes, sending a temperature stress release operating order to the outdoor unit. The system and the method for monitoring the temperature stress of the air conditioner have the advantages that by monitoring of stress of one or two temperature parameters of the junction temperature of the IPM module and the difference between the environment temperature and the temperature of the outdoor unit, temperature stress release is carried out when the operating time with the temperature stress exceeded reaches the upper limit, and consequently the air conditioner is enabled to operate under a load lower than a rated load, and reliability of equipment is improved while service life of the equipment is prolonged.
Description
Technical field
The present invention relates to airconditioning control field, particularly relate to a kind of method for supervising and system of air-conditioner temperature stress.
Background technology
Along with the extensive use of the development of Power Electronic Technique, particularly converter technique, the air-conditioner of current main flow is at cooling or heating effect, and humid control, there has been huge progress purification of air and energy-conservation aspect.By wireless communication technique and Internet technology are applied in air-conditioning, current air-conditioner is in hommization, and the aspects such as household, intellectuality and energy-saving obtain investigation and application widely of knowing clearly.Existing patent (application number: 200610036356.6) propose a kind of air-conditioning system possessing long-distance positioning function, this air-conditioner can pre-set the distance that air-conditioning can run automatically, when detecting that the geographical location information residing for people reaches predeterminable range, air-conditioner can run by Auto Power On.(application number: 201320074685.5) propose a kind of air-conditioning system based on weather information service, air-conditioner can generate best running temperature according to the Weather information on Cloud Server to existing patent automatically, thus ensures the comfortableness of air-conditioning.
In the detachable air conditioner of current family expenses, off-premises station is all work under the environment of rather harsh.Typical off-premises station is mounted on outdoor wall, and the difference of dress region, Yian, the environment temperature of off-premises station work may the change from-20 DEG C to 50 DEG C.
In convertible frequency air-conditioner, outdoor electric-controlled plate is primarily of control circuit, and the electronic devices and components such as SPM (Intelligent PowerModule, IPM) form.The compressor of converting operation, by IPM module drive, can improve efficiency and the comfort level of air-conditioning.Because off-premises station is operated in rugged environment, this reliability automatically controlled to outdoor proposes strict requirement.IPM module owing to producing very large power in very little space, and its junction temperature will much larger than environment temperature, and therefore IPM module bears very high temperature stress.The reliability of IPM module is one of key factor of outdoor automatically controlled reliability.
Summary of the invention
Based on this, be necessary the method for supervising that a kind of air-conditioner temperature stress is provided, SPM temperature stress is monitored, guarantee that air-conditioner can more intelligent and reliable operation.
The invention provides a kind of method for supervising of air-conditioner temperature stress, comprise the following steps:
S110, obtains the operational factor of IPM module of off-premises station every Preset Time, and/or off-premises station temperature and environment temperature;
S120, calculates the temperature difference of described off-premises station temperature and environment temperature, calculates the junction temperature of described IPM module according to described operational factor;
S130, judges whether have at least one to be greater than corresponding temperature threshold in described junction temperature and the described temperature difference, if so, then performs step S140, otherwise performs step S110;
S140, accumulative described off-premises station operates in the running time that described junction temperature and/or the described temperature difference exceed temperature threshold;
S150, judge running time of add up whether be greater than the preset temperature Stress Release time, if then perform step S160, otherwise execution step S110;
S160, sends instruction to described off-premises station, makes described off-premises station perform temperature stress releasing operation.
In addition, additionally provide a kind of monitoring system of air-conditioner temperature stress, comprise data obtaining module, data analysis module and control module, wherein:
Described data obtaining module is used for the operational factor of IPM module obtaining off-premises station every Preset Time, and/or off-premises station temperature and environment temperature;
Described data analysis module for calculating the temperature difference of described off-premises station temperature and environment temperature, and calculates the junction temperature of described IPM module according to described operational factor;
Described control module judges whether have at least one to be greater than corresponding temperature threshold in described junction temperature and the described temperature difference, if, then accumulative described off-premises station operates in the running time that described junction temperature and/or the described temperature difference exceed temperature threshold, otherwise described data obtaining module reruns;
Described control module, also for judging whether added up running time is greater than the preset temperature Stress Release time, if so, then sending instruction to described off-premises station, make described off-premises station perform temperature stress releasing operation, otherwise described data obtaining module reruning.
The method for supervising of above-mentioned air-conditioner temperature stress and system can pass through the stress of the junction temperature of monitoring IPM module and wherein one or two temperature parameter of the temperature difference of off-premises station temperature and environment temperature, as one of them samples unsuccessfully, failed parameter of then sampling is not done to judge, system can also do the judgement continuous service of temperature stress with another sampling parameter.So, under the state that air-conditioner can be made to be operated in lower than rated load, improve reliability and the service life of equipment.
Accompanying drawing explanation
Fig. 1 is the module map of the monitoring system of air-conditioning actuator temperature stress in present pre-ferred embodiments;
Fig. 2 is the electrical block diagram of IPM module in three-phase dc-ac converter circuit;
Fig. 3 is the flow chart of the method for supervising of air-conditioning actuator temperature stress in present pre-ferred embodiments;
Fig. 4 is the flow chart of the method for supervising of air-conditioning actuator temperature stress in another embodiment of the present invention.
Detailed description of the invention
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Referring to Fig. 1, the monitoring system of air-conditioning actuator temperature stress in present pre-ferred embodiments, in the present embodiment, can run with air-conditioner 10 for core carrier, also can be for core carrier runs with client 20 (intelligent terminal).Below with client 20 for core carrier run, describe preferred embodiment of the present invention in detail.
The monitoring system of air-conditioner temperature stress comprises air-conditioner 10, client 20 and Cloud Server 30, this client 20 and described air-conditioner 10 and Cloud Server 30 network communication.
Air-conditioner 10 comprises data acquisition module 11, controller 12 and communication module; Data acquisition module 11 mainly carries out real-time sampling to the operational factor of off-premises station IPM module (scheming not shown), and the running status of controller 12 pairs of air-conditioners 10 controls.
Client 20 comprises data obtaining module 21, data analysis module 22, control module 23, data disaply moudle 24 and communication module.Data obtaining module 21 mainly completes initialized work, obtains the type information of air-conditioner 10 and the geographical position of air-conditioner 10 installation, and sends to Cloud Server 30.Cloud Server 30 retrieves air-conditioning information database, and the air-conditioning data (mainly the parameter information of IPM module) sending respective model are to data analysis module 22, being transmitted in when data analysis module 22 runs for the first time of these data is carried out, and follow-uply carries out synchronous renewal when air-conditioning information database upgrades.Parameter information and the operational factor of the main IPM module to obtaining from air-conditioner 10 and Cloud Server 30 of data analysis module 22 carry out analytical calculation, provide the temperature stress data of IPM module.Control module 23 mainly exports data to data analysis module 22 and monitors in real time, and outputs a control signal to the control module 23 of air-conditioner 10.The data that data disaply moudle 24 pairs of data analysis modules 22 and control module 23 export carry out showing in real time, intuitively.
Cloud Server 30 comprises air-conditioning information database 31 and communication module.
In the present embodiment, the environment temperature of air-conditioner 10 can be obtained by weather server 40, also can obtain environment temperature by the temperature sensor on machine disposed in the outdoor.So, weather server 40 comprises weather real-time data base 41 and communication module.Cloud Server 30 and weather server 40 communication, obtain the environment temperature in the geographical position at air-conditioner 10 place, and send to the data analysis module 22 of client 20 from weather server 40 according to geographical position acquisition.If the weather real-time data base 41 of weather server 40 cannot connect, the data analysis module 22 of intelligent terminal will ignore this temperature information.
Each above-mentioned communication module is connected by network communication.Especially, be that the communication module of air-conditioner 10 is connected with the communication module of client 20, the communication module of client 20 is connected with the communication module of Cloud Server 30, and the communication module of Cloud Server 30 is connected with the communication module of weather server 40.
In more detailed embodiment, system first arranges the preset temperature Stress Release time, when the summation that IPM module operates in the running time exceeding temperature threshold arrive or exceed temperature threshold running time time, then control air-conditioner 10 and perform and operate with release temperature stress accordingly.Particularly:
Described data obtaining module 21 is for obtaining the operational factor of IPM module of off-premises station every Preset Time, and/or off-premises station temperature and environment temperature.This Preset Time can be arranged according to the size of preset temperature Stress Release time, with 0.1%, 1% or 3% time be a sampling period.
Described data analysis module 22 for calculating the temperature difference of described off-premises station temperature and environment temperature, also for calculating the junction temperature of described IPM module according to described operational factor.Typical operational factor comprises: the temperature of outdoor unit casing and the operating current of IPM module and operating voltage.
Described control module 23 judges whether have at least one to be greater than corresponding temperature threshold in described junction temperature and the described temperature difference (temperature stress parameter).If so, then accumulative described off-premises station operates in the running time that described junction temperature and/or the described temperature difference exceed temperature threshold; Otherwise described data obtaining module 21 reruns, enter the operational factor of the IPM module in next sampling period and the resampling of off-premises station temperature and environment temperature.Exceed the running time of temperature threshold: with run on temperature stress parameter exceed temperature stress standard (temperature threshold) sampling period (i.e. above-mentioned Preset Time) add up, run on temperature stress parameter and do not add up lower than the sampling period exceeding temperature stress standard.
Described control module 23 is also for judging whether added up running time is greater than the preset temperature Stress Release time.If so, then send instruction to described off-premises station, make described off-premises station perform temperature stress releasing operation; Otherwise described data obtaining module 21 reruns, enter the operational factor of the IPM module in next sampling period and the resampling of off-premises station temperature and environment temperature.It should be noted that, this preset temperature Stress Release time is a preset value, when the cumulative time whether system cloud gray model has at least one to be greater than corresponding temperature threshold in above-mentioned junction temperature and the temperature difference exceeds this preset value, system will perform temperature stress releasing operation.
Off-premises station performs temperature stress releasing operation and is specially: reduce knot to the thermal resistance of environment and/or the dissipated power reducing described IPM module.Reduce the thermal resistance R of knot to environment
jacan by increasing the rotating speed of outer blower fan and then increasing the coefficient of heat transfer of air; The dissipated power reducing IPM module can be realized by the output current of instantaneous reduction IPM module.
In embodiments of the invention, the stress of the junction temperature of monitoring IPM module and wherein one or two temperature parameter of the temperature difference of off-premises station temperature and environment temperature can be passed through, as one of them samples unsuccessfully, failed parameter of then sampling is not done to judge, system can also do the judgement continuous service of temperature stress with another sampling parameter.So, under the state that air-conditioner 10 can be made to be operated in lower than rated load, improve reliability and the service life of equipment.
Further, the calculating of the junction temperature of IPM module need rely on the parameter information calculating of IPM module.This parameter information can be pre-stored in monitoring system, also can Real-time Obtaining.Data obtaining module 21 can be utilized during Real-time Obtaining first to obtain the model of described air-conditioner 10 and be uploaded to described Cloud Server 30; Then, the parameter information that Cloud Server 30 searches described IPM module according to described model is sent to described client 20; Finally, data analysis module 22 calculates described junction temperature according to the operational factor of described IPM module and described parameter information.
The monitoring of SPM (IPM module) temperature stress and intelligent control method, to guarantee that air-conditioner 10 can more intelligent and reliable operation.Described air-conditioner 10 is made up of at least one off-premises station and at least one indoor set.The present invention not only can apply and domestic air conditioning, is also applicable to Large Central Air Conditioning System system.
The calculating of IPM module temperature stress completes in the data analysis module 22 of intelligent terminal.The temperature difference d of off-premises station temperature and environment temperature
texpression formula as follows:
d
T＝T
1-T
0
Wherein, T
0for the environment temperature of air-conditioner 10 region, T
1for the temperature of outdoor unit casing, owing to there is heat convection, T to outdoor environment in cabinet
1be more than or equal to T
0.The junction temperature T of IPM module
jexpression formula as follows:
T
j＝T
1+P*R
ja
Wherein, P is the power of IPM module, R
jafor IPM module ties the thermal resistance of environment.
Fig. 2 gives the electrical block diagram being applied in IPM module in three-phase dc-ac converter circuit.IPM modular circuit is made up of 6 igbt (IGBT) Q1 ~ Q6 and 6 antiparallel fast recovery diode (FRD) D1 ~ D6, and resistance R is sampling resistor.The dissipated power P of IPM module is the power sum of 6 IGBT and FRD.
For IGBT, its power consumption can be expressed as follows:
P
igbt＝D*I
c*V
ce+(E
on+E
off)*f
sw
For FRD, its power consumption can be expressed as follows:
P
frd＝(1-D)*I
d*V
d+E
rr*f
sw
Dissipated power P is the power sum of IGBT and FRD:
P＝6*(P
igbt+P
frd)
Wherein, D is the dutycycle of pulse signal, I
cand I
dbe respectively the electric current flowing through IGBT and FRD, V
ceand V
dbe respectively the forward conduction voltage drop of IGBT and FRD, E
on, E
offbe respectively the turn-on and turn-off loss of IGBT, E
rrfor the reverse recovery loss of diode, f
swfor the switching frequency of IGBT.Wherein, D, I
c, I
dand f
swdirect acquisition or indirect calculation can provide from the operational factor of the IPM module of sampling.Due to I
c, I
dchange in time with D, the method for its mean value or employing numerical integration in therefore calculating, should be adopted.V
cefor I
cfunction, V
dfor I
dfunction, other data obtain from the air-conditioning database Cloud Server 30, or store in systems in which.Therefore corresponding and each sampling instant, can calculate the T determined
j.
Refer to Fig. 3, the method for supervising of air-conditioner temperature stress comprises the following steps:
Step S110, obtains the operational factor of IPM module of off-premises station every Preset Time, and/or off-premises station temperature and environment temperature.
Step S120, calculates described off-premises station temperature T
1with environment temperature T
0temperature difference d
t, the junction temperature T of described IPM module is calculated according to described operational factor
j.
Step S130, judges described junction temperature T
jwith described temperature difference d
tin whether have at least one to be greater than corresponding temperature threshold, if so, then perform step S140, otherwise perform step S110.
Step S140, accumulative described off-premises station operates in the running time that described junction temperature and/or the described temperature difference exceed temperature threshold.
Step S150, judge running time of add up whether be greater than the preset temperature Stress Release time, if then perform step S160, otherwise execution step S110.
Step S160, sends instruction to described off-premises station, makes described off-premises station perform temperature stress releasing operation.
Composition graphs 1 and Fig. 3, control module 23 is first to junction temperature T
jwith temperature difference d
tjudge.For IPM module, product manual can provide maximum permission junction temperature T during its trouble free service
jmax, be generally 150 DEG C, adopt up-to-date technique can reach 175 DEG C.Because the power device in IPM module exists the ripple of electric current and voltage in the process of switch, cause the ripple of its junction temperature thus.We calculate the T provided
jbe actually the mean value of junction temperature in multiple switch periods.In typical case, the impact of design of Reducing Rating and ripple is considered, junction temperature T
jmaximum be generally set as T
jmax60%-80%.I.e. junction temperature T
jcorresponding temperature threshold can be arranged on 90 DEG C to 140 DEG C, temperature difference d
tmain by the impact of cabinet to external environment condition heat convection.Temperature difference d
tmaximum different with the change of condition of work, the main structure by outdoor unit casing, the impact of regional environment temperature.In typical situation, described temperature difference d
tcorresponding temperature threshold can be arranged in the scope of 5 DEG C to 15 DEG C, is preferably set in 10 DEG C.
If junction temperature T
jwith temperature difference d
tboth numerical value have a standard not meeting low stress at least, then this sampling time counted in stress running time of IPM module.If the time (i.e. preset temperature Stress Release time) that temperature stress is run reaches higher limit, then control module 23 sending controling instruction of intelligent terminal is to the controller 12 of air-conditioner 10, and controller 12 performs corresponding temperature stress releasing operation.
In a still further embodiment, the method for supervising of air-conditioner temperature stress is further comprising the steps of:
User sets operational factor, and air-conditioner 10 brings into operation; Intelligent terminal 20 obtains air-conditioner model and positional information, and is uploaded to manufacturer's Cloud Server 30 by communication module; Cloud Server 30 searches the model of air-conditioner 10 from database, obtains the parameter information calculating IPM module temperature stress; Cloud Server 30 sends air-conditioner positional information to weather server 40, obtains the environment temperature T of its region
0; Cloud Server 30 sends the parameter information of IPM module temperature stress and air-conditioner region environment temperature to intelligent terminal 20; Air-conditioning is every the temperature T of fixed time-interval sampling outdoor unit casing
1, the operating current I of IPM module
cwith voltage V
c; Sampled data is sent to the data analysis module 22 of intelligent terminal by air-conditioner 10 by communication module; Data analysis module 22 calculates the junction temperature T of IPM module
jwith temperature gap d
t=T
1-T
0; Data analysis module 22 sends result of calculation to control module 23 and data disaply moudle 24.
In more detail, the present embodiment, is monitored and Based Intelligent Control by the temperature stress of the data analysis module 22 and control module 23 pairs of off-premises station IPM modules that are arranged on intelligent terminal for relying in real time with client 20 and internet remote service.Refer to Fig. 1 and Fig. 4, more detailed flow process comprises the steps:
Step S10, the parameter that air-conditioning sets according to user brings into operation;
Step S11, intelligent terminal (i.e. client 20) first obtains type information and the installation site information of air-conditioner 10, is then sent in manufacturer's Cloud Server 30 by communication module.
Step S12, Cloud Server 30 searches the key parameter calculating IPM module temperature stress and need in air-conditioning information database 31, then sends to intelligent terminal by communication module.
Step S13, Cloud Server 30 passes through and weather server 40 communication, obtains the environment temperature T of air-conditioner 10 region
0, and send it back intelligent terminal.The information of environment temperature can real-time update.
Step S14, air-conditioner 10 is sampled every the operational factor of fixed time interval to off-premises station IPM module key, and typical operational factor comprises: the temperature of outdoor unit casing and the operating current of IPM module and operating voltage.Air-conditioner 10 is sent to sampled data by communication module the data analysis module 22 of intelligent terminal.
Step S15, the data that data analysis module 22 utilizes air-conditioner 10 and Cloud Server 30 to send, calculate the temperature stress parameter of IPM module, mainly comprise: the junction temperature T of (1) IPM module
j; (2) outdoor unit casing temperature rise d
t, be off-premises station (cabinet) temperature T
1with environment temperature T
0temperature difference d
t.If regional environment temperature cannot pass through cloud service Real-time Obtaining, then ignore the calculating of outdoor unit casing temperature rise herein, off-premises station (cabinet) temperature T
1temperature sensor can be utilized to detect.
Step S16, data analysis module 22 sends to data disaply moudle 24 and control module 23 result of calculation.
Step S17, the temperature stress in control module 23 pairs of off-premises station IPM module runnings is monitored in real time.First the junction temperature of IPM module calculated and outdoor unit casing temperature rise are analyzed, judge whether it meets the standard of low stress.If all meet low temperature stress criterion (namely the junction temperature of IPM module and outdoor unit casing temperature rise are all lower than corresponding preset temperature threshold value), then wait for the result in next sampling period and it is rejudged; If have at least one not meet low temperature stress criterion in the two, then operate in accumulative the running time not meeting low temperature stress criterion.If operate in the operation total time not meeting low temperature stress criterion to be less than higher limit, then wait for the result in next sampling period and it is rejudged.If operate in the operation total time not meeting low temperature stress criterion to exceed higher limit, then control module 23 is by the controller 12 of communication module sending controling instruction to air-conditioner 10.
Step S18, air-conditioner 10, under the effect of controller 12, performs the releasing operation of temperature stress.Junction temperature equals the dissipated power of IPM and the product of knot to the thermal resistance of environment relative to the temperature rise of environment.Therefore any operation, as long as can reduce the dissipated power of IPM or tie the thermal resistance of environment, all should be considered to the releasing operation of temperature stress.
By the present invention, the junction temperature of monitoring off-premises station IPM module that can be real-time also carries out Based Intelligent Control, thus guarantees the long-term reliability that off-premises station runs.
In another embodiment, with reference to figure 1, if the method for supervising of above-mentioned air-conditioner temperature stress and system are arranged in air-conditioner 10, then client can be omitted, in above-described embodiment, the modules of client 20 can be arranged on (except communication module) on air-conditioner, air-conditioner 10 and the communication of Cloud Server 30 straight-forward network, the operation method of its system is same as the previously described embodiments, repeats no more here.
The above embodiment only have expressed several embodiment of the present invention, and not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a method for supervising for air-conditioner temperature stress, is characterized in that, comprises the following steps:
S110, obtains the operational factor of IPM module of off-premises station every Preset Time, and/or off-premises station temperature and environment temperature;
S120, calculates the temperature difference of described off-premises station temperature and environment temperature, calculates the junction temperature of described IPM module according to described operational factor;
S130, judges whether have at least one to be greater than corresponding temperature threshold in described junction temperature and the described temperature difference, if so, then performs step S140, otherwise performs step S110;
S140, accumulative described off-premises station operates in the running time that described junction temperature and/or the described temperature difference exceed temperature threshold;
S150, judge running time of add up whether be greater than the preset temperature Stress Release time, if then perform step S160, otherwise execution step S110;
S160, sends instruction to described off-premises station, makes described off-premises station perform temperature stress releasing operation.
2. method for supervising according to claim 1, is characterized in that, the operational factor of described IPM module comprises operating current and the operating voltage of described IPM module.
3. method for supervising according to claim 1, is characterized in that, described off-premises station performs temperature stress releasing operation and is specially: reduce knot to the thermal resistance of environment and/or the dissipated power reducing described IPM module.
4. method for supervising according to claim 1, is characterized in that, the corresponding temperature threshold of described junction temperature is 90 DEG C to 140 DEG C, and the corresponding temperature threshold of the described temperature difference is 5 DEG C to 15 DEG C.
5. a monitoring system for air-conditioner temperature stress, is characterized in that, comprises data obtaining module, data analysis module and control module, wherein:
Described data obtaining module is used for the operational factor of IPM module obtaining off-premises station every Preset Time, and/or off-premises station temperature and environment temperature;
Described data analysis module for calculating the temperature difference of described off-premises station temperature and environment temperature, and calculates the junction temperature of described IPM module according to described operational factor;
Described control module judges whether have at least one to be greater than corresponding temperature threshold in described junction temperature and the described temperature difference, if, then accumulative described off-premises station operates in the running time that described junction temperature and/or the described temperature difference exceed temperature threshold, otherwise described data obtaining module reruns;
Described control module, also for judging whether added up running time is greater than the preset temperature Stress Release time, if so, then sending instruction to described off-premises station, make described off-premises station perform temperature stress releasing operation, otherwise described data obtaining module reruning.
6. monitoring system according to claim 5, is characterized in that, the operational factor of described IPM module comprises operating current and the operating voltage of described IPM module.
7. monitoring system according to claim 5, is characterized in that, the corresponding temperature threshold of described junction temperature is 90 DEG C to 140 DEG C, and the corresponding temperature threshold of the described temperature difference is 5 DEG C to 15 DEG C.
8. monitoring system according to claim 5, it is characterized in that, described monitoring system also comprises Cloud Server and client, this client and described air-conditioner and Cloud Server network communication, described data obtaining module, data analysis module and control module are arranged at this client or air-conditioner.
9. monitoring system according to claim 8, is characterized in that, described data obtaining module is also for obtaining the model of described air-conditioner and being uploaded to described Cloud Server;
The parameter information that described Cloud Server searches described IPM module according to described model is sent to described client;
Described data analysis module calculates described junction temperature T according to the operational factor of described IPM module and described parameter information
j.
10. monitoring system according to claim 9, is characterized in that, described data obtaining module, also for obtaining the geographical position of described air-conditioner, and is uploaded to described Cloud Server;
Described Cloud Server, with weather server communication, obtains the on-site described environment temperature of described air-conditioner according to described geographical position and is sent to described client.
11. monitoring systems according to any one of claim 5 to 10, is characterized in that, described off-premises station performs temperature stress releasing operation and is specially: reduce knot to the thermal resistance of environment and/or the dissipated power reducing described IPM module.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196784A (en) * | 2016-06-28 | 2016-12-07 | 海信科龙电器股份有限公司 | Convertible frequency air-conditioner Active Control Method and device |
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| CN110873441B (en) * | 2018-09-04 | 2021-09-21 | 重庆海尔空调器有限公司 | Control method and control device of air conditioner, storage medium and air conditioner |
| CN112104215A (en) * | 2020-09-14 | 2020-12-18 | 合肥阳光电动力科技有限公司 | Derating protection method and controller of inverter |
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| CN113110655A (en) * | 2021-04-19 | 2021-07-13 | 宁波弘讯软件开发有限公司 | Intelligent monitoring method and system for agricultural products |
| CN117554773A (en) * | 2024-01-11 | 2024-02-13 | 青岛中微创芯电子有限公司 | IPM module life prediction system |
| CN117554773B (en) * | 2024-01-11 | 2024-03-29 | 青岛中微创芯电子有限公司 | IPM module life prediction system |
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