US20060099084A1 - Electric blower - Google Patents
Electric blower Download PDFInfo
- Publication number
- US20060099084A1 US20060099084A1 US11/247,168 US24716805A US2006099084A1 US 20060099084 A1 US20060099084 A1 US 20060099084A1 US 24716805 A US24716805 A US 24716805A US 2006099084 A1 US2006099084 A1 US 2006099084A1
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- United States
- Prior art keywords
- blower
- load
- rotation
- amount
- rotation speed
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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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
- F24F11/0001—Control or safety arrangements for ventilation
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to an electric blower for use in an air conditioner or the like coupled to a duct to supply an airflow necessary to a refrigerating cycle or the like in response to the duct condition.
- FIG. 3 shows a process flowchart of a conventional electric blower described in patent-document 1 .
- the control process of the conventional electric blower comprises; step 135 to recognize the amount of target airflow; step 140 to calculate the amount of airflow by using the PWM signal sent to the electric motor at present and the fan rotational speed; steps 145 and 150 to compare the calculated amount of airflow with the amount of target airflow; steps 155 and 165 to correct the PWM signal according to the comparison results; and step 160 to send the corrected PWM signal to the motor controller, repeating from step 135 to step 160 constantly.
- the present invention aims at providing an electric blower to solve the above-mentioned drawbacks, which can operate stably keeping an amount of target airflow in response to conditions of duct.
- the electric blower of the present invention includes an electric motor, a blower with a fan driven to rotate by the electric motor, and a controller to control the electric motor.
- the controller comprises: a load-detector to detect output data on the magnitude of the load; a rotation-speed-calculator to calculate output data on the fan rotation speed required for the blower to discharge the amount of target airflow according to the magnitude of the load of the fan output from the load-detector and the given amount of target airflow; a rotation-speed-selector to switch over the rotation speed from the load-detection-rotation-speed determined previously to the rotation speed required for the blower to discharge the amount of target airflow according to the data output from the rotation speed calculator; and a timing-device to determine the operation timing for the load-detector, rotation-speed-calculator and rotation-speed-selector respectively.
- the configuration can perform a stable operation for the controlled airflow without amplifying the pulsation in the rotation speed, because the timing device is allowed to work according to need such as before the operation starts or when a load condition varies to detect the duct condition beforehand and can operate the blower at a rotation speed capable of discharging the amount of target airflow in response to the duct condition detected.
- FIG. 1 illustrates a block diagram of the electric blower used in exemplary embodiment 1 of the present invention.
- FIG. 2 illustrates a characteristic showing a relation between the amount of airflow and rotation speed of the electric blower used in exemplary embodiment 1 of the present invention.
- FIG. 3 illustrates a flowchart of a conventional electric blower.
- an amount of airflow is proportional to a rotation speed of a fan included in a duct when the duct condition is determined and the duct condition affects relative gradients or the like. If, therefore, the duct condition is detected somehow the relation between the amount of airflow and rotation speed can be determined.
- the duct condition is detectable as a load of the blower and the load of the blower is detectable as an output force of an electric motor as well.
- the output force of the electric motor is proportional to the product of the rotation speed and torque of the fan, the duct condition can be detected from the torque of the electric motor when the rotation speed is kept constant. In case of a DC motor, whose torque is proportional to the input current, the torque can be detected by measuring the motor input current. Therefore, the duct conditions can be detected by measuring the motor input current.
- the present invention is to detect the duct condition according to a value showing the magnitude of the load of the blower (hereafter referred to as a blower-load-variable) obtained from the input current of the electric motor operating at a predetermined rotation speed.
- a blower-load-variable a value showing the magnitude of the load of the blower (hereafter referred to as a blower-load-variable) obtained from the input current of the electric motor operating at a predetermined rotation speed.
- the blower must operate at a predetermined rotation speed.
- the duct condition is detected as a blower-load-variable.
- a fan rotation speed to discharge the amount of target airflow in response to the duct condition is calculated according to an empirical formula having been obtained from the characteristics of the blower. Subsequently, controlling the motor to rotate the fan at the given rotation speed can realize an operation for a stable airflow without doing any constant feedback control.
- FIG. 1 is a block diagram of the electric blower used in exemplary embodiment 1 of the present invention.
- electric blower 1 of the present invention includes electric motor 25 , blower 20 and controller 10 .
- Electric motor 25 supplies a driving force necessary to rotate blower 20 .
- a DC brush-less motor is employed in the exemplary embodiment.
- the driving shaft of electric motor 25 is coupled to blower 20 directly.
- Blower 20 flows air through duct system 15 forming an air-path.
- a sirocco fan is used in the blower of the exemplary embodiment.
- Controller 10 includes variable-motor-controller 30 , airflow-controller 35 and system-controller 40 .
- Variable-motor-controller 30 controls the rotation speed of the electric motor, in response to control-signal Fo produced in airflow-controller 35 . Additionally, variable-motor-controller 30 detects the motor rotation speed, and sends it to airflow-controller 35 as motor-rotation-speed-signal Rm.
- Airflow-controller 35 includes timing-device 100 , load-detector 105 , rotation-speed-calculator 110 , rotation-speed-selector 120 and control signal feeder 90 .
- Timing-device 100 allows to start load-detector 105 at a prescribed timing.
- Load-detector 105 receiving signals from timing-device 100 , outputs load-detection-rotation-signal Fra to drive electric motor 25 at a load detection rotation speed.
- Load-detector 105 additionally, outputs blower-load-variable Tra according to the electric motor input current Im measured at this time.
- System-controller 40 varying the operation capacity of a variable compressor (not shown) in response to an air-conditioning capacity required, sends rotation-speed-calculator 110 information on an amount of airflow, as target airflow Q, corresponding to the varied compressor capacity.
- Rotation-speed-calculator 110 calculates the fan rotation speed for the fan to discharge the amount of target airflow Q by substituting blower-load-variable Tra output from load-detector 105 and the amount of target airflow Q sent from system controller 40 into formula (a) described later. The fan-rotation-speed is then output as fan-rotation-speed-signal Fr.
- Rotation-speed-selector 120 switches over rotation-speed-signal Fs input into control signal feeder 90 from load-detection-rotation-signal Fra to fan-rotation-speed-signal Fr according to fan-rotation-speed-signal Fr output from rotation-speed-calculator 110 .
- Control-signal-feeder 90 sends rotation-speed-control-signal Fo to variable-motor-controller 30 so that rotation-speed-signal Fs from rotation-speed-selector 120 matches with motor-rotation-speed-signal Rm from variable-motor-controller 30 .
- Formula (a) is determined according to the following procedure.
- the blower load condition is detected to determine the blower-load-variable by measuring the input current of the electric motor driving the blower at a predetermined rotation speed.
- An input current value of the electric motor can be directly used as the blower-load-variable, or other value determined unambiguously from the input current value of the electric motor such as the ratio of the electric motor input current to the rated current may also be used as the variable.
- Duct system 15 is a conduit tube used to deliver airflow for certain regions to be conditioned.
- Duct system 15 is for instance installed in a building to supply conditioned airflow to rooms requiring the air.
- the static air pressure in duct system 15 is affected by form and length of the duct, damper 45 , filter 50 and heat exchanger 55 .
- a command from timing device 100 starts electric motor 25 at a predetermined rotation speed, which rotates blower 20 .
- rotation-speed-calculator 110 measures blower-load-variable Tra output from load-detector 105 .
- Blower-load-variable Tra thus measured is what reflects the duct conditions determined by the static air pressure in duct system 15 , the form and length of the duct, filter 50 and heat exchanger 55 .
- FIG. 2 illustrates characteristic curves showing relations between the amount of airflow and rotation speed of the blower from the aforementioned formula (a).
- the amount of airflow of the blower is proportional to the fan rotation speed, and the values of blower-load-variable Tra (Tra 1 to Tra 4 ) affect the gradient of lines as shown in FIG. 2 .
- rotation speed Fr for the amount of target airflow Q can be calculated by substituting the amount of target airflow signal Q sent from system controller 40 into the above formula (a).
- the amount of target airflow is supplied to the duct when control signal Fo corresponding to the rotation speed is sent to variable motor controller 30 .
- the aforementioned configuration can adjust the airflow to an amount of target airflow in response to the coupled duct conditions stably, because blower 20 operates at a rotation speed corresponding to the amount of target airflow required for a duct condition detected previously.
- Load-detector 105 , rotation-speed-calculator 110 and rotation-speed-selector 120 could start sequentially, and any case such as sequential starting following output from the precedent elements or sequential starting by control means such as timing device or the like could perform the aim of the present invention.
- Timing-device 100 may be a type that starts together with electric blower 1 .
- the type of timing device 100 can detect duct conditions automatically at the start of electric blower 1 instead of having to detect the duct conditions separately. For example, when an operation switch is turned on to operate a compressor (not shown), the load detection operation starts automatically to detect the duct condition by measuring blower-load-variable Tra previously.
- timing device 100 may be a type that detects the duct condition regularly. For example, by starting a load detection operation at 12 o'clock every day to measure blower-load-variable Tra and to store the data until 12 o'clock next day, the blower can respond to a change of duct conditions in the case of increase in resistance to the airflow owing to a pile of dust on filter 50 in duct system 15 .
- timing device 100 may be a type that operates at the change of airflow condition in duct system 15 , and then starts operation of load detector 105 .
- the configuration can detect open/shut condition of dampers installed in branches coupled to the duct.
- the electric blower of the present invention can discharge an amount of target airflow in response to the duct condition and is useful for duct type air conditioners or the like accordingly.
Abstract
Description
- The present invention relates to an electric blower for use in an air conditioner or the like coupled to a duct to supply an airflow necessary to a refrigerating cycle or the like in response to the duct condition.
- There has been the kind of conventional electric blower that, observing always a fan rotation speed and the PWM (Pulse Width Modulation) signal for an electric motor to calculate the amount of airflow to compare the calculated amount of airflow with an amount of target airflow, corrects the control signal sent to the electric motor if there is a difference between the two, which is so-called a feedback control method. The technology is disclosed for instance in Japanese Patent Unexamined Publication No. H07-301450 (hereafter referred to as patent document 1).
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FIG. 3 shows a process flowchart of a conventional electric blower described in patent-document 1. As shown inFIG. 3 , the control process of the conventional electric blower comprises;step 135 to recognize the amount of target airflow;step 140 to calculate the amount of airflow by using the PWM signal sent to the electric motor at present and the fan rotational speed;steps steps step 160 to send the corrected PWM signal to the motor controller, repeating fromstep 135 tostep 160 constantly. - However, owing to pulsations occurring inevitably in the airflow of electric blowers, conventional electric blowers cannot continue to operate stably matching the amount of target airflow with the calculated amount of airflow, but is operated always fluctuated in the rotation speed. Moreover, elements having big inertia such as the electric motor and fan included in the feedback control system could cause overshooting or depending on conditions the pulsation could be amplified to cause an unstable rotation speed fluctuating largely
- The present invention aims at providing an electric blower to solve the above-mentioned drawbacks, which can operate stably keeping an amount of target airflow in response to conditions of duct.
- To solve the above-mentioned drawbacks the electric blower of the present invention includes an electric motor, a blower with a fan driven to rotate by the electric motor, and a controller to control the electric motor. The controller comprises: a load-detector to detect output data on the magnitude of the load; a rotation-speed-calculator to calculate output data on the fan rotation speed required for the blower to discharge the amount of target airflow according to the magnitude of the load of the fan output from the load-detector and the given amount of target airflow; a rotation-speed-selector to switch over the rotation speed from the load-detection-rotation-speed determined previously to the rotation speed required for the blower to discharge the amount of target airflow according to the data output from the rotation speed calculator; and a timing-device to determine the operation timing for the load-detector, rotation-speed-calculator and rotation-speed-selector respectively.
- The configuration can perform a stable operation for the controlled airflow without amplifying the pulsation in the rotation speed, because the timing device is allowed to work according to need such as before the operation starts or when a load condition varies to detect the duct condition beforehand and can operate the blower at a rotation speed capable of discharging the amount of target airflow in response to the duct condition detected.
-
FIG. 1 illustrates a block diagram of the electric blower used inexemplary embodiment 1 of the present invention. -
FIG. 2 illustrates a characteristic showing a relation between the amount of airflow and rotation speed of the electric blower used inexemplary embodiment 1 of the present invention. -
FIG. 3 illustrates a flowchart of a conventional electric blower. - Generally, an amount of airflow is proportional to a rotation speed of a fan included in a duct when the duct condition is determined and the duct condition affects relative gradients or the like. If, therefore, the duct condition is detected somehow the relation between the amount of airflow and rotation speed can be determined. The duct condition is detectable as a load of the blower and the load of the blower is detectable as an output force of an electric motor as well. Moreover, because the output force of the electric motor is proportional to the product of the rotation speed and torque of the fan, the duct condition can be detected from the torque of the electric motor when the rotation speed is kept constant. In case of a DC motor, whose torque is proportional to the input current, the torque can be detected by measuring the motor input current. Therefore, the duct conditions can be detected by measuring the motor input current.
- The present invention is to detect the duct condition according to a value showing the magnitude of the load of the blower (hereafter referred to as a blower-load-variable) obtained from the input current of the electric motor operating at a predetermined rotation speed. To measure the blower-load-variable, the blower must operate at a predetermined rotation speed.
- Namely, through the operation to detect the load by measuring the input current of the electric motor operating at a predetermined rotation speed, the duct condition is detected as a blower-load-variable. A fan rotation speed to discharge the amount of target airflow in response to the duct condition is calculated according to an empirical formula having been obtained from the characteristics of the blower. Subsequently, controlling the motor to rotate the fan at the given rotation speed can realize an operation for a stable airflow without doing any constant feedback control.
- Now, exemplary embodiment of the present invention is described with reference to the drawings. The present invention is not limited to the exemplary embodiment only.
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FIG. 1 is a block diagram of the electric blower used inexemplary embodiment 1 of the present invention. InFIG. 1 ,electric blower 1 of the present invention includeselectric motor 25,blower 20 andcontroller 10. -
Electric motor 25 supplies a driving force necessary to rotateblower 20. A DC brush-less motor is employed in the exemplary embodiment. The driving shaft ofelectric motor 25 is coupled to blower 20 directly. -
Blower 20 flows air throughduct system 15 forming an air-path. A sirocco fan is used in the blower of the exemplary embodiment. -
Controller 10 includes variable-motor-controller 30, airflow-controller 35 and system-controller 40. - Variable-motor-
controller 30 controls the rotation speed of the electric motor, in response to control-signal Fo produced in airflow-controller 35. Additionally, variable-motor-controller 30 detects the motor rotation speed, and sends it to airflow-controller 35 as motor-rotation-speed-signal Rm. - Airflow-
controller 35 includes timing-device 100, load-detector 105, rotation-speed-calculator 110, rotation-speed-selector 120 andcontrol signal feeder 90. - Timing-
device 100 allows to start load-detector 105 at a prescribed timing. - Load-
detector 105, receiving signals from timing-device 100, outputs load-detection-rotation-signal Fra to driveelectric motor 25 at a load detection rotation speed. Load-detector 105, additionally, outputs blower-load-variable Tra according to the electric motor input current Im measured at this time. - System-
controller 40, varying the operation capacity of a variable compressor (not shown) in response to an air-conditioning capacity required, sends rotation-speed-calculator 110 information on an amount of airflow, as target airflow Q, corresponding to the varied compressor capacity. - Rotation-speed-
calculator 110 calculates the fan rotation speed for the fan to discharge the amount of target airflow Q by substituting blower-load-variable Tra output from load-detector 105 and the amount of target airflow Q sent fromsystem controller 40 into formula (a) described later. The fan-rotation-speed is then output as fan-rotation-speed-signal Fr. - Rotation-speed-
selector 120 switches over rotation-speed-signal Fs input intocontrol signal feeder 90 from load-detection-rotation-signal Fra to fan-rotation-speed-signal Fr according to fan-rotation-speed-signal Fr output from rotation-speed-calculator 110. - Control-signal-
feeder 90 sends rotation-speed-control-signal Fo to variable-motor-controller 30 so that rotation-speed-signal Fs from rotation-speed-selector 120 matches with motor-rotation-speed-signal Rm from variable-motor-controller 30. - Formula (a) is determined according to the following procedure.
- (1) The blower load condition is detected to determine the blower-load-variable by measuring the input current of the electric motor driving the blower at a predetermined rotation speed.
- (2) The fan rotation speed is varied leaving the blower-load-variable kept constant, and then the amount of airflow of the blower is measured in each varied fan rotation speed.
- (3) The empirical formula is determined as formula (a) from the relationship between the amount of airflow of the blower and the fan rotation speed in the above experiment by using the least-square method.
- An input current value of the electric motor can be directly used as the blower-load-variable, or other value determined unambiguously from the input current value of the electric motor such as the ratio of the electric motor input current to the rated current may also be used as the variable.
-
Duct system 15 is a conduit tube used to deliver airflow for certain regions to be conditioned.Duct system 15 is for instance installed in a building to supply conditioned airflow to rooms requiring the air. The static air pressure induct system 15 is affected by form and length of the duct,damper 45,filter 50 andheat exchanger 55. - Now, the work and function of
electric blower 1 with aforementioned configuration is described. - A command from
timing device 100 startselectric motor 25 at a predetermined rotation speed, which rotatesblower 20. Whenblower 20 reaches a stable rotation speed, rotation-speed-calculator 110 measures blower-load-variable Tra output from load-detector 105. Blower-load-variable Tra thus measured is what reflects the duct conditions determined by the static air pressure induct system 15, the form and length of the duct,filter 50 andheat exchanger 55. -
FIG. 2 illustrates characteristic curves showing relations between the amount of airflow and rotation speed of the blower from the aforementioned formula (a). The amount of airflow of the blower is proportional to the fan rotation speed, and the values of blower-load-variable Tra (Tra1 to Tra4) affect the gradient of lines as shown inFIG. 2 . - For example, the rotation speed Fr is given by the following formula (a), using blower-load-variable Tra and amount of target airflow Q at a load detection rotation speed of 600 r/min.
Fr=−642.75+6.0837 Tra+19598.1/Tra+(−121.96+1.819 Tra+4134.1/Tra)Q
Where -
- Fr: rotation speed in r/min
- Tra: blower-load-variable
- Q: amount of airflow
- With stored data of measured blower-load-variable Tra, rotation speed Fr for the amount of target airflow Q can be calculated by substituting the amount of target airflow signal Q sent from
system controller 40 into the above formula (a). The amount of target airflow is supplied to the duct when control signal Fo corresponding to the rotation speed is sent tovariable motor controller 30. - The aforementioned configuration can adjust the airflow to an amount of target airflow in response to the coupled duct conditions stably, because
blower 20 operates at a rotation speed corresponding to the amount of target airflow required for a duct condition detected previously. - Load-
detector 105, rotation-speed-calculator 110 and rotation-speed-selector 120 could start sequentially, and any case such as sequential starting following output from the precedent elements or sequential starting by control means such as timing device or the like could perform the aim of the present invention. - Timing-
device 100 may be a type that starts together withelectric blower 1. In a newly installed air-conditioner, the type oftiming device 100 can detect duct conditions automatically at the start ofelectric blower 1 instead of having to detect the duct conditions separately. For example, when an operation switch is turned on to operate a compressor (not shown), the load detection operation starts automatically to detect the duct condition by measuring blower-load-variable Tra previously. - Moreover,
timing device 100 may be a type that detects the duct condition regularly. For example, by starting a load detection operation at 12 o'clock every day to measure blower-load-variable Tra and to store the data until 12 o'clock next day, the blower can respond to a change of duct conditions in the case of increase in resistance to the airflow owing to a pile of dust onfilter 50 induct system 15. - Additionally,
timing device 100 may be a type that operates at the change of airflow condition induct system 15, and then starts operation ofload detector 105. The configuration can detect open/shut condition of dampers installed in branches coupled to the duct. - As described above, the electric blower of the present invention can discharge an amount of target airflow in response to the duct condition and is useful for duct type air conditioners or the like accordingly.
Claims (8)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2004-323376 | 2004-11-08 | ||
JP2004323376 | 2004-11-08 | ||
JP2005-243864 | 2005-08-25 | ||
JP2005243864A JP2006153426A (en) | 2004-11-08 | 2005-08-25 | Electric blower |
Publications (1)
Publication Number | Publication Date |
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US20060099084A1 true US20060099084A1 (en) | 2006-05-11 |
Family
ID=36316508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/247,168 Abandoned US20060099084A1 (en) | 2004-11-08 | 2005-10-12 | Electric blower |
Country Status (2)
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US (1) | US20060099084A1 (en) |
JP (1) | JP2006153426A (en) |
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US20080119126A1 (en) * | 2006-11-10 | 2008-05-22 | Oyl Research And Development Centre Sdn. Bhd. | Apparatus for Controlling an Air Distribution System |
US20090097988A1 (en) * | 2007-05-07 | 2009-04-16 | Oyl Research And Development Centre Sdn. Bhd. | Airflow control for variable speed blowers |
US20090104034A1 (en) * | 2005-10-04 | 2009-04-23 | Matsushita Electric Industrial Co., Ltd | Blower and electric device with such blower mounted thereon |
US20090136360A1 (en) * | 2007-11-28 | 2009-05-28 | Young-Chun Jeung | Method of constant airflow control for a ventilation system |
US20120058717A1 (en) * | 2009-10-20 | 2012-03-08 | SMAY Sp. z o.o | Overpressure-based System to protect vertical evacuation routes against smoke infiltration |
EP2660527A1 (en) * | 2012-05-03 | 2013-11-06 | ABB Oy | Method for tuning a ventilation system |
CN109026803A (en) * | 2018-07-08 | 2018-12-18 | 苏州妙文信息科技有限公司 | A kind of automatic adjustment refrigeration system |
WO2020101217A1 (en) * | 2018-11-16 | 2020-05-22 | Lg Electronics Inc. | Air conditioner of fan motor and operating method thereof |
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JP6272101B2 (en) * | 2014-03-27 | 2018-01-31 | 株式会社Nttファシリティーズ | Air volume control method in air conditioning system |
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4978896A (en) * | 1989-07-26 | 1990-12-18 | General Electric Company | Method and apparatus for controlling a blower motor in an air handling system |
US5197666A (en) * | 1991-03-18 | 1993-03-30 | Wedekind Gilbert L | Method and apparatus for estimation of thermal parameter for climate control |
US5447414A (en) * | 1994-05-27 | 1995-09-05 | Emerson Electric Co. | Constant air flow control apparatus and method |
US5509788A (en) * | 1993-09-27 | 1996-04-23 | Diversey Corporation | Flow-metered pumping with load compensation system and method |
US5736823A (en) * | 1994-05-27 | 1998-04-07 | Emerson Electric Co. | Constant air flow control apparatus and method |
US6353299B1 (en) * | 1999-10-19 | 2002-03-05 | Fasco Industries, Inc. | Control algorithm for brushless DC motor/blower system |
US6353303B1 (en) * | 1999-10-19 | 2002-03-05 | Fasco Industries, Inc. | Control algorithm for induction motor/blower system |
US6462494B1 (en) * | 1999-03-23 | 2002-10-08 | Ebm Werke Gmbh & Co. | Fan with preset characteristic curve |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62162791A (en) * | 1986-01-13 | 1987-07-18 | Kawasaki Steel Corp | Airflow controlling method for blowing and exhausting device |
JPH074730A (en) * | 1992-12-22 | 1995-01-10 | Fujitsu Syst Constr Kk | Air volume setting-control method |
JP2985754B2 (en) * | 1995-12-29 | 1999-12-06 | ダイキン工業株式会社 | Air conditioner |
JP2001124382A (en) * | 1999-10-26 | 2001-05-11 | Daikin Ind Ltd | Air supply unit |
JP3823902B2 (en) * | 2002-08-29 | 2006-09-20 | 三菱電機株式会社 | Air purifier control device |
-
2005
- 2005-08-25 JP JP2005243864A patent/JP2006153426A/en active Pending
- 2005-10-12 US US11/247,168 patent/US20060099084A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4978896A (en) * | 1989-07-26 | 1990-12-18 | General Electric Company | Method and apparatus for controlling a blower motor in an air handling system |
US5197666A (en) * | 1991-03-18 | 1993-03-30 | Wedekind Gilbert L | Method and apparatus for estimation of thermal parameter for climate control |
US5509788A (en) * | 1993-09-27 | 1996-04-23 | Diversey Corporation | Flow-metered pumping with load compensation system and method |
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