WO2020129246A1 - Dispositif de climatisation et son procédé de commande - Google Patents

Dispositif de climatisation et son procédé de commande Download PDF

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Publication number
WO2020129246A1
WO2020129246A1 PCT/JP2018/047305 JP2018047305W WO2020129246A1 WO 2020129246 A1 WO2020129246 A1 WO 2020129246A1 JP 2018047305 W JP2018047305 W JP 2018047305W WO 2020129246 A1 WO2020129246 A1 WO 2020129246A1
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WO
WIPO (PCT)
Prior art keywords
compressor
current value
temperature
shell
air conditioner
Prior art date
Application number
PCT/JP2018/047305
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English (en)
Japanese (ja)
Inventor
勇希 鳥井
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2020561124A priority Critical patent/JP6956903B2/ja
Priority to PCT/JP2018/047305 priority patent/WO2020129246A1/fr
Publication of WO2020129246A1 publication Critical patent/WO2020129246A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

  • the present invention relates to an air conditioner including an outdoor unit and a control method thereof.
  • the input current value of the compressor at startup exceeds the preset upper limit value
  • the input current value is kept low to avoid the operation of the compressor protection device, etc., and the compressor stabilizes after a certain period of time. It is known to recover operation and prevent a decrease in cooling or heating capacity. With such an air conditioner, indoor comfort can be maintained.
  • the operating value of the overcurrent detector is set as the preset upper limit value of the input current value at the time of starting the compressor, and the overcurrent detection at the time of starting is detected. Avoid stopping the compressor due to the operation of the compressor.
  • the present invention is for solving the above-mentioned problems, and by operating the thermal protector to stop the outdoor unit before the winding of the compressor reaches the dielectric breakdown temperature, the dielectric breakdown of the winding is prevented.
  • An object of the present invention is to provide an air conditioner that can be prevented and a control method thereof.
  • An air conditioner is an air conditioner including an outdoor unit having a compressor, the overheat protection device being provided in a shell of the compressor and detecting a surface temperature of the shell, and the compressor.
  • a lock detection unit for detecting the lock state of, and a control unit for controlling the input current value to the compressor, the control unit, when the lock state of the compressor is detected by the lock detection unit, The current value input to the compressor is reduced to a preset current value at which the overheat protection device can operate.
  • an air conditioner control method is an air conditioner control method including an outdoor unit having a compressor, the lock detecting step of detecting a lock state of the compressor, and the compressor. And a control step of controlling an input current value for the compressor, wherein in the control step, when the lock state of the compressor is detected in the lock detecting step, a current value input to the compressor is set in advance.
  • the overheat protection device for detecting the set surface temperature in the shell of the compressor is lowered to a current value at which it can operate.
  • an increase in winding temperature of the compressor is suppressed, and the overheat protection device is activated to stop the outdoor unit before the winding reaches the dielectric breakdown temperature. It is possible to prevent the insulation breakdown of the winding wire.
  • FIG. 1 It is a schematic diagram which shows the refrigerant circuit of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a front view which shows the structure of the outdoor unit in the air conditioning apparatus of FIG. It is a perspective view which shows the structure of the outdoor unit in the air conditioning apparatus of FIG. It is a flowchart which shows the input current processing procedure in the air conditioning apparatus of FIG. It is explanatory drawing which shows the operating characteristic of the control part in the air conditioning apparatus of FIG.
  • FIG. 1 is a schematic diagram showing a refrigerant circuit 5 of an air conditioner 1 according to Embodiment 1 of the present invention.
  • the air-conditioning apparatus 1 cools or heats the room by conditioning heat by transferring heat between the outside air and the room air via a refrigerant. It has an indoor unit 2 and an outdoor unit 3.
  • the indoor unit 2 and the outdoor unit 3 are pipe-connected via the refrigerant pipes 4, 4a, 4b to form a refrigerant circuit 5 in which the refrigerant circulates.
  • the refrigerant circuit 5 is provided with a compressor 10, a flow path switching device 11, an outdoor heat exchanger 12, an expansion valve 13 and an indoor heat exchanger 14, which are connected via refrigerant pipes 4, 4a, 4b. There is.
  • the outdoor unit 3 has a compressor 10, a flow path switching device 11, an outdoor heat exchanger 12, and an expansion valve 13.
  • the compressor 10 compresses the drawn refrigerant and discharges it.
  • the compressor 10 may include an inverter device.
  • the operating frequency can be changed by the control unit 6 to change the capacity of the compressor 10.
  • the capacity of the compressor 10 is the amount of refrigerant sent out per unit time.
  • the compressor 10 has a thermal protector 7 (see also FIG. 3) as an overheat protection device attached to a shell 101 described later.
  • the outdoor unit 3 includes a lock detection unit 8 that detects a locked state of the compressor 10 by detecting a step-out of a motor included in the compressor 10.
  • the control unit 6 controls the input current value of the compressor 10 to the compressor 10. Then, when the locked state of the compressor 10 is detected by the lock detection unit 8, the control unit 6 sets the current value input to the compressor 10 to a preset current value at which the thermal protector 7 can operate. It is supposed to be lowered. At this time, the current value at which the thermal protector 7 can operate is set in advance by conducting an experiment to obtain a current value that allows the surface temperature of the shell 101 to follow the rise in the winding temperature of the compressor 10. ..
  • the flow path switching device 11 is, for example, a four-way valve, and is a device that switches the direction of the refrigerant flow path.
  • the air conditioner 1 can realize the heating operation or the cooling operation by switching the flow of the refrigerant using the flow path switching device 11 based on the instruction from the control unit 6.
  • the outdoor heat exchanger 12 exchanges heat between the refrigerant and the outdoor air. Further, the outdoor heat exchanger 12 is provided with an outdoor blower 15 in order to enhance the efficiency of heat exchange between the refrigerant and the outdoor air.
  • An inverter device may be attached to the outdoor blower 15. In this case, the inverter device changes the operating frequency of the fan motor 16 that is the drive source of the outdoor blower 15 to change the rotation speed of the fan.
  • the outdoor blower 15 is not limited to this as long as the same effect can be obtained.
  • the type of fan may be a sirocco fan or a plug fan.
  • the outdoor blower 15 may be of a push type or a pull type.
  • the outdoor heat exchanger 12 functions as an evaporator during the heating operation, and heat-exchanges between the low-pressure refrigerant flowing from the refrigerant pipe 4b side and the outdoor air to evaporate and evaporate the refrigerant. Then, it is made to flow out to the refrigerant pipe 4a side. Further, the outdoor heat exchanger 12 functions as a condenser during the cooling operation, and the refrigerant that has been compressed by the compressor 10 that has flowed in from the refrigerant pipe 4a side via the flow path switching device 11 and the outdoor air. Heat is exchanged between them to condense and liquefy the refrigerant and let it flow out to the refrigerant pipe 4b side.
  • the outdoor air is used as the external fluid
  • the external fluid is not limited to the gas containing the outdoor air and may be a liquid containing water.
  • the expansion valve 13 is a throttle device that controls the flow rate of the refrigerant, and the pressure of the refrigerant is adjusted by adjusting the flow rate of the refrigerant flowing through the refrigerant pipe 4 by changing the opening degree of the expansion valve 13.
  • the expansion valve 13 expands and depressurizes the high-pressure liquid-state refrigerant into the low-pressure gas-liquid two-phase refrigerant during the cooling operation.
  • the expansion valve 13 is not limited to this, and may be an electronic expansion valve or a capillary tube as long as the same effect can be obtained.
  • the expansion valve 13 is an electronic expansion valve, the opening degree is adjusted based on an instruction from the control unit 6.
  • the indoor unit 2 includes an indoor heat exchanger 14 that exchanges heat between the refrigerant and the indoor air, and an indoor blower 17 that adjusts the flow of air for the indoor heat exchanger 14 to exchange heat.
  • the indoor heat exchanger 14 functions as a condenser during heating operation, performs heat exchange between the refrigerant flowing from the refrigerant pipe 4a side and the indoor air, condenses and liquefies the refrigerant, and the refrigerant pipe It is discharged to the 4b side.
  • the indoor heat exchanger 14 functions as an evaporator during the cooling operation, and performs heat exchange between the refrigerant that is brought into a low pressure state by the expansion valve 13 that has flowed in from the refrigerant pipe 4b side and the indoor air, The heat of the air is taken by the refrigerant to be evaporated and vaporized, and the refrigerant is made to flow to the refrigerant pipe 4a side.
  • the indoor air is used as the external fluid
  • the external fluid is not limited to the gas including the indoor air, and may be a liquid including water.
  • the operating speed of the indoor blower 17 is determined by user settings. It is preferable to attach an inverter device to the indoor blower 17 and change the operating frequency of the fan motor 18 to change the rotation speed of the fan.
  • the indoor blower 17 is not limited to this as long as the same effect can be obtained.
  • the type of fan may be a sirocco fan or a plug fan.
  • the indoor blower 17 may be of a push type or a pull type.
  • the high-temperature high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the outdoor heat exchanger 12 via the flow path switching device 11.
  • the gas refrigerant flowing into the outdoor heat exchanger 12 is condensed by heat exchange with the outside air blown by the outdoor blower 15, becomes a low-temperature refrigerant, and flows out from the outdoor heat exchanger 12.
  • the refrigerant flowing out of the outdoor heat exchanger 12 is expanded and decompressed by the expansion valve 13 to become a low-temperature low-pressure gas-liquid two-phase refrigerant.
  • This gas-liquid two-phase refrigerant flows into the indoor heat exchanger 14 of the indoor unit 2, evaporates by heat exchange with the indoor air blown by the indoor blower 17, and becomes a low-temperature low-pressure gas refrigerant, which becomes the indoor heat exchanger. Outflow from 14. At this time, the indoor air cooled by the heat absorbed by the refrigerant becomes conditioned air (blowing air) and is blown from the indoor unit 2 into the room that is the air conditioning target space. The gas refrigerant flowing out of the indoor heat exchanger 14 is sucked into the compressor 10 via the flow path switching device 11 and compressed again. The above operation is repeated in the cooling operation of the air conditioner 1 (indicated by a solid arrow in FIG. 1 ).
  • the heating operation will be described as an operation example of the air conditioning apparatus 1.
  • the high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the indoor heat exchanger 14 of the indoor unit 2 via the flow path switching device 11.
  • the gas refrigerant flowing into the indoor heat exchanger 14 is condensed by heat exchange with the indoor air blown by the indoor blower 17, becomes a low-temperature refrigerant, and flows out from the indoor heat exchanger 14.
  • the indoor air warmed by receiving heat from the gas refrigerant becomes conditioned air (blowing air) and is blown out from the indoor unit 2 into the room.
  • the refrigerant flowing out from the indoor heat exchanger 14 is expanded and decompressed by the expansion valve 13 to become a low-temperature low-pressure gas-liquid two-phase refrigerant.
  • the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 12 of the outdoor unit 3, evaporates by heat exchange with the outside air blown by the outdoor blower 15, and becomes a low-temperature and low-pressure gas refrigerant, which is the outdoor heat exchanger 12 Drained from.
  • the gas refrigerant flowing out of the outdoor heat exchanger 12 is sucked into the compressor 10 via the flow path switching device 11 and compressed again. The above operation is repeated in the heating operation of the air conditioner 1 (indicated by a dashed arrow in FIG. 1 ).
  • FIG. 2 is a front view showing the configuration of the outdoor unit 3 in the air conditioning apparatus 1 of FIG.
  • FIG. 3 is a perspective view showing the configuration of the outdoor unit 3 in the air conditioning apparatus 1 of FIG.
  • a housing panel 30 that covers the outer shell is formed in a rectangular parallelepiped shape.
  • the interior of the housing panel 30 is partitioned by a partition plate 31 into an air passage chamber 32 and a machine chamber 33.
  • the outdoor blower 15 is installed on the front side of the housing panel 30 in the air duct chamber 32. Further, on the rear side of the outdoor blower 15 in the air duct chamber 32, the outdoor heat exchanger 12 mounted in an L shape from the back side to the side face of the air duct chamber 32 of the housing panel 30 is installed.
  • the housing panel 30 includes a front upper outer panel 30a, a lower front outer panel 30b, and a rear upper outer panel (not shown), and surrounds the four side surfaces of the machine room 33 together with the partition plate 31.
  • the configuration of the housing panel 30 of the machine room 33 described above is an example, and the number of parts of the housing panel 30 or the position of the joint is not limited.
  • the outdoor unit 3 may be a front outer panel that integrates the front upper outer panel 30a and the lower front outer panel 30b.
  • the outdoor blower 15 is provided with a plurality of blades 15b on the outer circumference of a boss 15a which is the center of rotation, and is rotationally driven by a fan motor 16.
  • the front upper outer panel 30a of the housing panel 30 located on the front side of the outdoor blower 15 has a slit-shaped blow for discharging the air inside the housing panel 30 to the outside of the housing panel 30.
  • An outlet 30c is provided.
  • the outdoor heat exchanger 12 has a structure including a heat transfer tube through which a refrigerant flows, although not shown in detail, and fins for increasing a heat transfer area between the refrigerant flowing through the heat transfer tube and the outside air. ing.
  • the machine room 33 is provided with a compressor 10 that is connected to the outdoor heat exchanger 12 via the refrigerant pipe 4 and supplies the refrigerant to the outdoor heat exchanger 12.
  • the thermal protector 7 is attached to the shell 101 of the compressor 10.
  • the thermal protector 7 functions as an overheat protection device that detects the surface temperature of the shell 101.
  • electric components such as a power module and an inverter board are installed, including a current sensor that detects whether the outdoor unit 3 is operating.
  • FIG. 4 is a flowchart showing an input current processing procedure in the air conditioner 1 of FIG.
  • FIG. 5 is explanatory drawing which shows the operation characteristic of the control part 6 in the air conditioning apparatus 1 of FIG.
  • the vertical axis of the upper graph shows temperature T
  • the vertical axis of the lower graph shows current I
  • the horizontal axis shows time t in both upper and lower stages.
  • the control unit 6 first deactivates the motor provided in the compressor 10 by the lock detection unit 8 in step S1.
  • the lock state of the compressor 10 is detected by detecting the key.
  • the control unit 6 proceeds to step S2 and becomes the normal operation, and ends the input current processing procedure.
  • the controller 6 proceeds to step S3 and suppresses the input current to a preset control value I0 (set value). The operation of the outdoor unit 3 is continued.
  • step S3 the control unit 6 reduces the current value input to the compressor 10 to a preset control value I0.
  • the control value I0 is set in advance by conducting an experiment to obtain a current value that allows the surface temperature L2 of the shell 101 to follow the rise in the winding temperature L1 of the motor provided in the compressor 10. deep. In this way, the control value I0 is set at a current value that allows the surface temperature L2 of the shell 101 to follow the rise in the winding temperature L1 of the compressor 10, so the winding of the motor provided in the compressor 10
  • the thermal protector 7 can be actuated before the dielectric breakdown occurs.
  • control unit 6 proceeds to step S4 and ends the input current processing procedure when the thermal protector 7 is activated.
  • the thermal protector 7 When the surface temperature L2 of the shell 101 of the compressor 10 exceeds the operating temperature T0 and reaches the operating temperature T1 of the thermal protector 7 (time point t2), the thermal protector 7 operates and the operation of the outdoor unit 3 starts. Stop.
  • the control value I0 is set in advance as described above, it is possible to control the winding temperature L1 of the compressor 10 to follow the surface temperature L2 of the shell 101 so as not to exceed the dielectric breakdown temperature T2.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Un dispositif de climatisation comprend : une unité extérieure ayant un compresseur; un dispositif de protection contre la surchauffe qui est disposé sur une coque du compresseur et détecte la température de surface de la coque; une unité de détection de verrouillage qui détecte un état verrouillé pour le compresseur; et une unité de commande qui commande la valeur de courant d'entrée pour le compresseur. L'unité de commande réduit la valeur de courant fournie au compresseur à une valeur de courant prédéfinie à laquelle le dispositif de protection contre la surchauffe peut fonctionner, si un état verrouillé de compresseur est détecté par l'unité de détection de verrouillage. Par conséquent, l'augmentation de la température d'enroulement du compresseur peut être supprimée, un protecteur thermique peut être actionné avant que l'enroulement atteigne une température de claquage diélectrique et que l'unité extérieure soit arrêtée en toute sécurité, et une claquage diélectrique des enroulements peut être empêchée.
PCT/JP2018/047305 2018-12-21 2018-12-21 Dispositif de climatisation et son procédé de commande WO2020129246A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020561124A JP6956903B2 (ja) 2018-12-21 2018-12-21 空気調和装置およびその制御方法
PCT/JP2018/047305 WO2020129246A1 (fr) 2018-12-21 2018-12-21 Dispositif de climatisation et son procédé de commande

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PCT/JP2018/047305 WO2020129246A1 (fr) 2018-12-21 2018-12-21 Dispositif de climatisation et son procédé de commande

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432259A (zh) * 2021-06-23 2021-09-24 Tcl空调器(中山)有限公司 空调器及其除霜方法、装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63212785A (ja) * 1987-02-27 1988-09-05 Daikin Ind Ltd インバ−タ駆動式空気調和機の圧縮機ロツク検出方式
JPH04350442A (ja) * 1991-05-27 1992-12-04 Fujitsu General Ltd 空気調和機の制御方法
JPH0763447A (ja) * 1993-08-25 1995-03-10 Mitsubishi Electric Corp 冷凍サイクル装置
JP2003269341A (ja) * 2002-03-15 2003-09-25 Sanyo Electric Co Ltd 圧縮機の保護装置
JP3120688U (ja) * 2006-01-06 2006-04-20 山田電機製造株式会社 過負荷保護器およびこれを用いた機器
KR20080013402A (ko) * 2006-08-08 2008-02-13 엘지전자 주식회사 인버터 압축기의 제어방법 및 그에 따른 공기조화기
JP2009108754A (ja) * 2007-10-30 2009-05-21 Toshiba Corp 圧縮機の制御装置
US20100293397A1 (en) * 2009-05-18 2010-11-18 Pham Hung M Diagnostic system
CN102678508A (zh) * 2011-03-18 2012-09-19 森萨塔科技（常州）有限公司 具有电机保护器的空调压缩机以及空调器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY190716A (en) * 2014-05-12 2022-05-12 Panasonic Ip Man Co Ltd Refrigeration cycle device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63212785A (ja) * 1987-02-27 1988-09-05 Daikin Ind Ltd インバ−タ駆動式空気調和機の圧縮機ロツク検出方式
JPH04350442A (ja) * 1991-05-27 1992-12-04 Fujitsu General Ltd 空気調和機の制御方法
JPH0763447A (ja) * 1993-08-25 1995-03-10 Mitsubishi Electric Corp 冷凍サイクル装置
JP2003269341A (ja) * 2002-03-15 2003-09-25 Sanyo Electric Co Ltd 圧縮機の保護装置
JP3120688U (ja) * 2006-01-06 2006-04-20 山田電機製造株式会社 過負荷保護器およびこれを用いた機器
KR20080013402A (ko) * 2006-08-08 2008-02-13 엘지전자 주식회사 인버터 압축기의 제어방법 및 그에 따른 공기조화기
JP2009108754A (ja) * 2007-10-30 2009-05-21 Toshiba Corp 圧縮機の制御装置
US20100293397A1 (en) * 2009-05-18 2010-11-18 Pham Hung M Diagnostic system
CN102678508A (zh) * 2011-03-18 2012-09-19 森萨塔科技（常州）有限公司 具有电机保护器的空调压缩机以及空调器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432259A (zh) * 2021-06-23 2021-09-24 Tcl空调器(中山)有限公司 空调器及其除霜方法、装置
CN113432259B (zh) * 2021-06-23 2022-09-02 Tcl空调器(中山)有限公司 空调器及其除霜方法、装置

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JPWO2020129246A1 (ja) 2021-09-09

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