WO2002004874A1 - Systeme de climatisation - Google Patents

Systeme de climatisation Download PDF

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Publication number
WO2002004874A1
WO2002004874A1 PCT/JP2001/006065 JP0106065W WO0204874A1 WO 2002004874 A1 WO2002004874 A1 WO 2002004874A1 JP 0106065 W JP0106065 W JP 0106065W WO 0204874 A1 WO0204874 A1 WO 0204874A1
Authority
WO
WIPO (PCT)
Prior art keywords
blower
mode
control means
air conditioner
headwind
Prior art date
Application number
PCT/JP2001/006065
Other languages
English (en)
Japanese (ja)
Inventor
Norihiro Takenaka
Original Assignee
Daikin Industries, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daikin Industries, Ltd. filed Critical Daikin Industries, Ltd.
Priority to AU2001269514A priority Critical patent/AU2001269514A1/en
Publication of WO2002004874A1 publication Critical patent/WO2002004874A1/fr

Links

Classifications

    • 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
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air

Definitions

  • the present invention relates to an air conditioner that sends air to a heat exchanger by a blower.
  • an air conditioner installed outdoors has a blower that rotates in a certain direction to send air to an air passage including a heat exchanger.
  • this type of blower there is an air-conditioner type that controls a target rotation speed in accordance with the temperature of outside air.
  • air conditioners are sometimes installed on the rooftop of buildings or in places where strong winds tend to blow.
  • the blower may be exposed to headwind.
  • radiation fins for cooling the components of the control circuit are arranged in the air path of the air conditioner. In the case of strong headwind, the airflow to the radiating fins is reduced, so the protection circuit may be activated and the compressor may stop.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide an air conditioner capable of suppressing a decrease in heat exchange capacity at the time of a headwind and improving reliability. is there. Disclosure of the invention
  • Means taken by the present invention to achieve the above object are as follows.
  • the first invention includes a blower for sending wind to an air passage including a heat exchanger, a backwind detection unit, and a blower control unit having a backwind mode for controlling the blower according to a signal from the backwind detection unit.
  • the backward wind is the wind flowing in the direction opposite to the normal blow direction (forward direction) of the blower.
  • the blower control unit having a backwind mode for controlling the blower according to a signal from the backwind detection unit.
  • a second invention is based on the first invention, and further comprises a rotation speed detecting means for detecting a rotation speed of a motor driving the blower. Then, the blower control means has a normal mode for bringing the mode closer to the target rotation speed.
  • the headwind detecting means includes a means for detecting a headwind based on a deviation between the detected rotation speed and the target rotation speed.
  • a headwind can be detected using a sensor originally provided to control the rotation speed of the motor. As a result, there is no need to newly provide a headwind detecting means, and the structure can be simplified.
  • the backwind detection means includes a means for detecting a backwind with a current value of a motor that drives the blower.
  • the motor load increases to maintain the motor speed at the target speed, and the current flowing through the motor increases. Therefore, the strong wind is detected by focusing on this current value. Since the motor current is originally used for motor control, headwind can be easily detected without complicating the structure.
  • the blower control means is configured to stop the blower in a reverse wind mode.
  • the headwind passes through the heat exchanger while rotating the blower in the reverse direction. Therefore, the heat exchange capacity of the heat exchanger can be maintained without applying unnecessary load to the blower.
  • the blower control means restarts the motor based on the reverse rotation speed of the blower detected during the backward wind mode and returns to the normal mode.
  • the mode when the headwind stops during the blowing mode, the mode is returned to the normal mode. As a result, the headwind mode does not continue until unnecessary.
  • a plurality of blowers are provided in parallel.
  • a motor, rotation speed detecting means and blower control means are provided for each blower.
  • a seventh invention is configured such that, in accordance with the sixth invention, when any of the blower control means shifts to the reverse wind mode, the remaining blower control means also shifts to the reverse wind mode.
  • blower control means when a state in which any of the blower control means shifts to the reverse wind mode continues for a predetermined time, the remaining blower control means also shifts to the reverse wind mode.
  • the ninth invention is directed to the sixth invention in which a backwind detecting means is provided for each blower in accordance with the sixth invention.- Depending on the situation of surrounding obstacles, etc., a considerable amount of headwind is received by each blower. According to the present invention, even if any blower receives a strong headwind, this can be detected.
  • each of the blower control means shifts to the reverse wind mode independently of each other according to a signal from the corresponding reverse wind detection means.
  • each blower control means shifts to the reverse wind mode in a state where another blower control means is stopped in the normal mode or the reverse wind mode.
  • FIG. 1 is a schematic cross-sectional view showing an internal configuration of an air conditioner according to an embodiment of the present invention, in which a blower blows forward air into a housing.
  • FIG. 2 is a block diagram showing an electric configuration of the blower control.
  • FIG. 3 is a flowchart showing the flow of the blower control.
  • FIG. 4 is a schematic cross-sectional view of the air conditioner showing a state in which the operation of each blower is stopped during a strong headwind.
  • FIG. 5 is a schematic cross-sectional view of an air conditioner in the case where the drive of only some of the blowers is stopped during a strong headwind.
  • FIG. 1 shows an air conditioner according to an embodiment of the present invention, which is arranged outdoors.
  • the air conditioner 1 includes a housing 2 as a main body.
  • An air passage 3 is defined in the housing 2.
  • the air passage 3 is opened to the outside by providing an inlet 4 and an outlet 5 on the opposing first surface 3a and second surface 3b of the housing 2, respectively.
  • a fin coil type heat exchanger 6 is disposed in the suction port 4 of the first surface 3a.
  • a plurality of blowers 6 and 7 are vertically arranged in parallel.
  • the blowers 6 and 7 normally generate a forward airflow F1 so that the outdoor air is sucked into the housing 2 through the heat exchanger 6 and the suction port 4 and discharged from the outlet 5.
  • F1 forward airflow
  • the exchanger 6 exchanges heat between the refrigerant flowing inside and the outdoor air.
  • a radiation fin 9 is arranged in the air passage 3 in the housing 2.
  • the radiating fins 9 are for cooling a circuit for controlling inversion (corresponding to the blower control units 14 and 15 described later).
  • An outside air temperature sensor 10 is arranged at a predetermined portion of the housing 2.
  • the blowers 6 and 7 are driven by motors 11 and 12 composed of DC motors and motors.
  • the rotation speed of each motor 11 and 12 is detected by the speed sensor 13.
  • the speed sensor 13 constitutes a rotation speed detecting means, and constitutes a part of a headwind detecting means.
  • a DC tacho generator, a pulse generator, a low speed encoder, or the like is used as the speed sensor 13, for example.
  • blower control In the blower control according to the present embodiment, a method will be described in which a voltage converted to direct current is subjected to pulse width modulation (PWM) to control the voltage to each of the motors 11 and 12 composed of a DC mode.
  • PWM pulse width modulation
  • the present invention is not limited to this, and may control the AC mode by pulse width control or vector control.
  • the outside air temperature sensor 10, the speed sensor 13, and the current sensor 16 are connected to the blower control units 14, 15 corresponding to the motors 11, 12, respectively.
  • the blower control units 14, 15 constitute a part of the blower control means, and receive signals from the sensors 10, 13, 16 respectively.
  • each of the blower control units 14 and 15 is connected to a modulation unit 18 including, for example, a transistor via a dryino 17.
  • the current value of the electric power supplied to the motors 11 and 12 under the voltage control is detected by the current sensors 16.
  • the detected current values of the current sensors 16 are fed back to the blower control units 14 and 15 corresponding to the motors 11 and 12, respectively.
  • Each of the blower control units 14 and 15 controls the modulation unit 18 by receiving signals from the outside air temperature sensor 10, the speed sensor 13 and the current sensor 16, respectively.
  • the voltage converted to DC by the rectifier 19 is pulse width modulated by the modulator 18, the applied voltages of the motors 11 and 12 are controlled, and the speeds of the motors 11 and 12 are controlled.
  • each of the blower control units 14 and 15 is provided with a transmission / reception unit 20 for mutually transmitting and receiving a switching signal to a backwind mode described later.
  • An operation signal of the protection circuit is input to each transmitting / receiving unit 20.
  • Each of the blower controllers 14 and 15 has a normal mode in which the corresponding motors 11 and 12 approach the target rotation speed.
  • the target rotation speed is set based on the outside air temperature detected by the outside air temperature sensor 10.
  • Each of the blower controllers 14 and 15 controls the voltage applied to each of the motors 11 and 12 according to the deviation between the rotation speed detected by the corresponding speed sensor 13 and the target rotation speed.
  • the normal mode includes a case where only some of the fans 7 and 8 are driven and the remaining fans 7 and 8 are stopped to save energy.
  • Each of the blower control units 14, 15 constitutes a part of the backwind detecting means, and detects the strength of the backwind based on a deviation between the rotation speed detected by the corresponding speed sensor 13 and the target rotation speed. I do. Then, for example, each of the blower controllers 14 and 15 shifts to a headwind mode in which the blowers 7 and 8 are stopped in response to detection of a strong headwind. However, in the reverse wind mode, each of the blowers 7, 8 may be driven in the reverse rotation direction.
  • the value of the current flowing through each motor 11 and 12 may be used to detect the headwind without using the above-described deviation of the rotation speed.
  • the loads on motors 11 and 12 increase to maintain motors 11 and 12 at the target speed. Therefore, the value of the current flowing through motors 11 and 12 increases, and this current value is detected to detect a headwind. Since the current values of the motors 11 and 12 are originally used for the control of 11 and 12, the headwind can be easily detected without complicating the structure. Next, the flow of the blower control will be described with reference to the flowchart of FIG.
  • step S1 the strength of the headwind received by each of the blowers 7, 8 is monitored individually (step S1). If a headwind exceeding the specified intensity is detected, the mode is switched to the headwind mode, provided that the protection circuit is activated (step S2). After the cessation of all blowers 7, 8 to confirm whether it is set (step S 3), it stops the driving of all of the blower 7, 8 (step S4).
  • the normal flow to heat exchanger 6 is The airflow R1 can flow in the direction opposite to the direction of the airflow.
  • a situation in which the compressor is stopped can be avoided.
  • step S5 the strength of the headwind is monitored by the blowers 7, 8 based on the rotation speed in the reverse direction.
  • the mode shifts to the normal mode and all the blowers 7, 8 are restarted (step S6).
  • step S7 the drive of only some of the blowers 7 (or 8) is stopped (step S7).
  • a predetermined time for example, T seconds
  • T seconds elapses based on the number of reverse winds received by the blower 7 (or 8) that has stopped driving, based on the number of rotations of the blower 7 (or 8) in the reverse direction.
  • Monitoring Steps S8, S9). If the strong headwind stops during monitoring, the mode switches to the normal mode, restarts the blower 7 (or 8) whose driving has been stopped, and returns to the last sword (steps S8, S10, S1). ).
  • the backwind can be detected using the speed sensor 13 originally provided for controlling the rotation speed of the motors 11 and 12, the structure can be simplified without the necessity of providing a new backwind detecting means. The same applies to the case where a method of detecting headwinds using the current values of motors 11 and 12 is adopted.
  • the heat exchange capacity of the heat exchanger 6 can be maintained without applying unnecessary load to the blowers 7 and 8.
  • the mode If the strong wind stops during the ventilation mode, the mode returns to the normal mode, and the headwind mode does not continue until it is unnecessary. Further, when one of the blowers 7 or 8 stops in the reverse wind mode, the remaining blowers 8 also stop, so that the short circuit does not cause a shortage of air flow.
  • Steps S8 and S9 all the blowers 7, 8 are stopped for a predetermined time after observing the headwind, so that the blowers are not inadvertently stopped. I have to.
  • each blower 7,8 since the back wind detecting means is provided for each of the blowers 7, 8, even if any of the blowers 7, 8 receives a strong back wind, this can be detected. Further, the blower 7 (or 8) that has received a strong headwind can shift in the headwind mode independently of the other blowers 8 (or 7).
  • the motors 11 and 12 can be reliably cooled.
  • the present invention is not limited to the above embodiment.
  • some blowers may be stopped for energy saving. Even in such a case, it is possible to allow the operating blower to shift to the reverse wind mode.
  • various changes can be made within the scope of the present invention.
  • the air conditioner according to the present invention is useful when placed outdoors, and is particularly suitable when the blower is exposed to strong headwinds.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Un vent de face (R) est détecté sur la base de l'écart entre les vitesses de rotation détectées de moteurs (11, 12) d'entraînement de souffleries (7, 8) et une vitesse de rotation cible. En cas de fort vent de face, le fonctionnement est commuté en mode de vent de face, afin de stopper l'entraînement des souffleries (7, 8) et de leur permettre d'être mises naturellement en rotation par le vent de face (R). Des courants d'air (R1) induits par le vent de face (R) circulent à travers une conduite (3), afin d'assurer le passage d'un certain volume d'air à travers un échangeur thermique (6) et des ailettes de rayonnement (9).
PCT/JP2001/006065 2000-07-12 2001-07-12 Systeme de climatisation WO2002004874A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001269514A AU2001269514A1 (en) 2000-07-12 2001-07-12 Air conditioning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-211464 2000-07-12
JP2000211464A JP4650649B2 (ja) 2000-07-12 2000-07-12 空気調和装置

Publications (1)

Publication Number Publication Date
WO2002004874A1 true WO2002004874A1 (fr) 2002-01-17

Family

ID=18707564

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/006065 WO2002004874A1 (fr) 2000-07-12 2001-07-12 Systeme de climatisation

Country Status (3)

Country Link
JP (1) JP4650649B2 (fr)
AU (1) AU2001269514A1 (fr)
WO (1) WO2002004874A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190017711A1 (en) * 2016-01-07 2019-01-17 Samsung Electronics Co., Ltd. Air conditioner

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100992880B1 (ko) 2008-05-28 2010-11-08 강남필터 주식회사 환기시스템의 역풍에 따른 구동모터 보호장치 및 그 방법
JP2011033337A (ja) * 2010-11-15 2011-02-17 Daikin Industries Ltd ファン駆動装置及び空調機
KR102208111B1 (ko) * 2013-11-01 2021-01-27 엘지전자 주식회사 실외기의 제어방법
KR101611310B1 (ko) * 2014-10-02 2016-04-12 엘지전자 주식회사 공기조화기 및 그 제어방법
KR102506516B1 (ko) * 2018-10-22 2023-03-03 엘지전자 주식회사 공기조화기 및 그의 제어방법
JP7475881B2 (ja) 2020-02-06 2024-04-30 日立ジョンソンコントロールズ空調株式会社 制御システムおよび空気調和装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694170A (en) * 1979-12-28 1981-07-30 Fuji Electric Co Ltd Airrcooled condenser unit
JPS61213544A (ja) * 1985-03-20 1986-09-22 Matsushita Electric Ind Co Ltd 空気調和機の送風制御装置
JPH02282646A (ja) * 1989-04-24 1990-11-20 Fujitsu General Ltd 空気調和機の室外機
JPH04332333A (ja) * 1991-05-01 1992-11-19 Daikin Ind Ltd 空気調和装置の送風制御装置
JPH08145441A (ja) * 1994-11-17 1996-06-07 Toyotomi Co Ltd 室外機のファン制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694170A (en) * 1979-12-28 1981-07-30 Fuji Electric Co Ltd Airrcooled condenser unit
JPS61213544A (ja) * 1985-03-20 1986-09-22 Matsushita Electric Ind Co Ltd 空気調和機の送風制御装置
JPH02282646A (ja) * 1989-04-24 1990-11-20 Fujitsu General Ltd 空気調和機の室外機
JPH04332333A (ja) * 1991-05-01 1992-11-19 Daikin Ind Ltd 空気調和装置の送風制御装置
JPH08145441A (ja) * 1994-11-17 1996-06-07 Toyotomi Co Ltd 室外機のファン制御装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190017711A1 (en) * 2016-01-07 2019-01-17 Samsung Electronics Co., Ltd. Air conditioner
US10866000B2 (en) * 2016-01-07 2020-12-15 Samsung Electronics Co., Ltd. Air conditioner

Also Published As

Publication number Publication date
AU2001269514A1 (en) 2002-01-21
JP2002022243A (ja) 2002-01-23
JP4650649B2 (ja) 2011-03-16

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