WO2021038735A1 - Appareil de climatisation - Google Patents

Appareil de climatisation Download PDF

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Publication number
WO2021038735A1
WO2021038735A1 PCT/JP2019/033604 JP2019033604W WO2021038735A1 WO 2021038735 A1 WO2021038735 A1 WO 2021038735A1 JP 2019033604 W JP2019033604 W JP 2019033604W WO 2021038735 A1 WO2021038735 A1 WO 2021038735A1
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WO
WIPO (PCT)
Prior art keywords
compressor
temperature
thermal protector
stop
air conditioner
Prior art date
Application number
PCT/JP2019/033604
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English (en)
Japanese (ja)
Inventor
翼 丹田
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 JP2021541854A priority Critical patent/JP7150185B2/ja
Priority to PCT/JP2019/033604 priority patent/WO2021038735A1/fr
Publication of WO2021038735A1 publication Critical patent/WO2021038735A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • 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 has been made to solve the above problems, and an object of the present invention is to provide an air conditioner having improved air conditioning comfort.
  • the air conditioner when the temperature of the outer shell of the compressed air temperature becomes lower than the operating temperature of the thermal protector, the current supply to the compressor is stopped. Therefore, if the compressor is experiencing an unusual temperature rise, the compressor drive is stopped before the thermal protector operates. That is, the compressor is stopped without interrupting the current supply circuit due to the operation of the thermal protector. Therefore, when the temperature of the outer shell of the compressor drops to be lower than the stop temperature and the compressor is restarted, the compressor is restarted quickly. As a result, the comfort of air conditioning control by the air conditioner 1 is improved.
  • FIG. 5 is a flowchart showing a processing procedure after the compressor is stopped in the air conditioner according to the fourth embodiment.
  • FIG. 1 is a refrigerant circuit diagram of the air conditioner according to the first embodiment.
  • the air conditioner 1 has an outdoor unit 2, an indoor unit 3, and a control unit 4.
  • the outdoor unit 2 includes a compressor 21, a flow path switching unit 22, an outdoor heat exchanger 23, a first expansion valve 24, and a refrigerant container 25.
  • the indoor unit 3 has an indoor heat exchanger 31 and a second expansion valve 32.
  • the refrigerant circuit 5 is formed by the compressor 21, the flow path switching unit 22, the outdoor heat exchanger 23, the first expansion valve 24, the second expansion valve 32, the refrigerant container 25, the indoor heat exchanger 31, and the refrigerant piping. There is.
  • the compressor 21 sucks in the refrigerant and compresses the sucked refrigerant into a high temperature and high pressure state. For example, by arbitrarily changing the operating frequency with an inverter circuit or the like, the capacity of the compressor 21, that is, the amount of the refrigerant delivered per unit time is changed.
  • a thermal protector 60 and a thermistor 70 are provided on the outer shell of the compressor 21.
  • the bimetal when the outer temperature of the compressor 21 rises and falls below a predetermined temperature, the bimetal returns to its original shape, the disconnected current supply circuit is reconnected and becomes a closed circuit, and the current to the compressor 21 is reached. Supply will be resumed.
  • the deformation of the bimetal and the opening of the current supply circuit by the thermal protector 60 is referred to as the operation of the thermal protector 60, and the value of the temperature at which the thermal protector 60 operates is referred to as the operating temperature.
  • the operating temperature is set higher than the stop temperature of the compressor 21, which will be described later.
  • the bimetal returns to the original shape and the thermal protector 60 closes the current supply circuit, it is called a return of the thermal protector 60, and a value of the temperature at which the thermal protector 60 returns is called a return temperature.
  • the control unit 4 is composed of dedicated hardware or a CPU (Central Processing Unit) that executes a program stored in a memory.
  • the CPU is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a processor.
  • each function executed by the control unit 4 is realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are written as programs and stored in memory.
  • the CPU realizes each function of the control unit 4 by reading and executing the program stored in the memory.
  • the memory is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM.
  • a part of the function of the control unit 4 may be realized by dedicated hardware, and a part may be realized by software or firmware.
  • FIG. 2 is a flowchart showing the operation of the compressor in the air conditioner according to the first embodiment.
  • the compressor 21 is started by the control of the control unit 4.
  • the control unit 4 checks the detection result of the thermistor 70, and confirms whether or not the outer temperature of the compressor 21 is equal to or higher than the stop temperature.
  • the stop temperature is a preset value within the allowable range of the outer temperature of the compressor 21, and is set lower than the above-mentioned operating temperature of the thermal protector 60.
  • step S4 if the control unit 4 confirms that the outer temperature of the compressor 21 has not dropped to a temperature lower than the stop temperature, the process of step S4 is repeated.
  • step S2 If it is confirmed in step S2 that the outer temperature of the compressor 21 detected by the thermistor 70 has not reached the stop temperature, the process does not proceed to step S3, and the driving state of the compressor 21 is maintained. After that, when the outer temperature of the compressor 21 rises and becomes equal to or higher than the operating temperature of the thermal protector 60 (YES in step S5), the above-mentioned bimetal of the thermal protector 60 is thermally deformed and a current is supplied to the compressor 21. Is stopped. As a result, the drive of the compressor 21 is stopped (step S7).
  • step S2 when it is determined that the outer temperature of the compressor 21 is lower than the stop temperature, the outer temperature of the compressor 21 becomes equal to or higher than the operating temperature of the thermal protector 60, for example, the thermistor 70. It is assumed that it will drop out for some reason. Further, when the control unit 4 is a CPU and each function executed by the control unit 4 is realized by software, firmware, or a combination of software and firmware, abnormal termination of software is assumed.
  • step S2 it is confirmed that the outer temperature of the compressor 21 has not reached the stop temperature, the driving state of the compressor 21 is maintained, and the outer temperature of the compressor 21 is lower than the operating temperature of the thermal protector 60. If it is maintained, the process of step S6 is executed.
  • the control unit 4 checks the detection result of the thermistor 70 and confirms whether or not the outer temperature of the compressor 21 is lower than the stop temperature. When it is confirmed in step S6 that the outer temperature of the compressor 21 is equal to or higher than the stop temperature, the process returns to step S2, and the above-mentioned processes after step S2 are repeated. If it is confirmed in step S6 that the outer temperature of the compressor 21 is lower than the stop temperature, the process of step S6 is repeated.
  • the stop temperature is set lower than the operating temperature. Therefore, even if the outer temperature of the compressor 21 rises after the compressor 21 is started, the thermal protector 60 does not operate before the process of step S2 is executed.
  • Embodiment 2 The air conditioner according to the second embodiment has a refrigerant circuit similar to the refrigerant circuit shown in FIG.
  • the return temperature of the thermal protector 60 described above is set higher than the upper limit of the air temperature at which the air conditioner 1 operates.
  • the compressor 21 cannot be restarted after the thermal protector 60 operates once.
  • the return temperature of the thermal protector 60 is set to 10 ° C.
  • the thermal protector 60 operates in an environment where the air temperature is maintained at around 30 ° C., until the air temperature drops to 10 ° C. or less. , The thermal protector 60 does not recover. Therefore, in order to control the air conditioning of the air conditioner 1, it is necessary to replace the thermal protector 60.
  • the thermal protector 60 operates under the environment of the air temperature at which the air conditioner 1 operates. After that, the compressor 21 can be restarted.
  • the thermal protector 60 is configured so that the return temperature is higher than 52 ° C.
  • the thermal protector 60 first recovers in the process of dropping to the operating air temperature of the air conditioner 1. Therefore, the phenomenon that the compressor 21 is not restarted even though the air conditioner 1 is operating is avoided. Therefore, according to the second embodiment, when the air temperature drops after the thermal protector 60 operates, the stagnation of the air conditioning control by the air conditioning device 1 is suppressed.
  • FIG. 3 is a flowchart showing the operation of the compressor in the air conditioner according to the third embodiment.
  • the air conditioner according to the third embodiment has a refrigerant circuit similar to the refrigerant circuit shown in FIG.
  • the restart of the compressor 21 is controlled based on the return permission temperature set lower than the return temperature described above.
  • the thermal protector 60 operates and the compressor 21 stops (step S11).
  • the process of step S13 is executed. If the outer temperature of the compressor 21 continues to be higher than the return temperature after the compressor 21 is stopped (NO in step S12), the process of step S13 is not executed.
  • step S14 the control unit 4 checks the detection result of the thermistor 70, and confirms whether or not the outer temperature of the compressor 21 is equal to or lower than the return permitted temperature.
  • the return permitted temperature is set to a value lower than the return temperature of the thermal protector 60.
  • step S15 the control unit 4 executes a process of restarting the compressor 21. If it is confirmed in step S14 that the outer temperature of the compressor 21 is still higher than the return permitted temperature, the process returns to step S12.
  • the thermal protector 60 When the operating temperature of the thermal protector 60 and the return temperature are close to each other, even if the thermal protector 60 operates and the drive of the compressor 21 is stopped, the thermal protector 60 recovers before the outer temperature of the compressor 21 drops sufficiently. The heated state of the compressor 21 may be maintained.
  • the thermal protector 60 when the outer temperature of the compressor 21 rises, the thermal protector 60 operates, and the compressor 21 stops, the outer temperature of the compressor 21 is set lower than the return temperature. The compressor 21 is kept stopped until the return allowed temperature is lowered. Therefore, it is suppressed that the compressor 21 is restarted while the heated state of the compressor 21 is maintained.
  • FIG. 5 is a refrigerant circuit diagram of the air conditioner according to the fourth embodiment.
  • the air conditioner according to the fourth embodiment has a refrigerant circuit similar to the refrigerant circuit shown in FIG.
  • the air conditioner 100 according to the fourth embodiment includes a display device 42 and a pressure switch 61 of the compressor 21.
  • the display device 42 may be provided on the remote controller of the indoor unit 3, or may be provided on a device (not shown) that monitors the operation of the air conditioner 100.
  • the pressure switch 61 is a protective device for protecting the compressor 21, and is connected in series with the thermal protector 60 in a current supply circuit that supplies a current to the compressor 21.
  • the pressure switch 61 turns off when the pressure on the discharge side of the compressor 21 rises to a predetermined value, shuts off the current supply circuit, and turns on when the pressure on the discharge side of the compressor 21 is lower than the predetermined value.
  • the current supply circuit is configured to be a closed circuit.
  • the pressure switch 61 has a protection function for driving and stopping the compressor 21 based on the height of the pressure on the discharge side of the compressor 21.
  • the set time is set to 3 minutes.
  • the control unit 4 transmits a control signal for restarting to the compressor 21.
  • step S24 the control unit 4 checks whether the compressor 21 can be restarted. When it is confirmed that the compressor 21 can be restarted, the process proceeds to step S25, and in step S25, the compressor 21 is restarted.
  • Air conditioner 1 Air conditioner, 2 Outdoor unit, 3 Indoor unit, 4 Control unit, 5 Refrigerant circuit, 13 Outdoor heat exchanger, 14 1st expansion valve, 15 2nd expansion valve, 20 Temperature detection means, 21 Compressor, 22 Flow Road switching part, 23 outdoor heat exchanger, 24 first expansion valve, 25 refrigerant container, 31 indoor heat exchanger, 32 second expansion valve, 42 display device, 60 thermal protector, 61 pressure switch, 70 thermista, 100 air conditioning apparatus.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un appareil de climatisation, lequel appareil comprend : un compresseur ; des moyens de détection de température pour détecter la température de l'enveloppe externe du compresseur ; un dispositif de protection thermique qui est configuré de façon à délivrer du courant au compresseur et à arrêter la délivrance de courant en réponse à des fluctuations de la température de l'enveloppe externe du compresseur ; et une unité de commande qui commande la délivrance de courant au compresseur. L'unité de commande est configurée de façon à interrompre la délivrance de courant au compresseur quand la température de l'enveloppe externe détectée par les moyens de détection de température devient supérieure ou égale à une température d'arrêt prédéterminée. Le dispositif de protection thermique est configuré de façon à interrompre la délivrance de courant au compresseur quand la température de l'enveloppe externe devient supérieure ou égale à une température de fonctionnement supérieure à la température d'arrêt.
PCT/JP2019/033604 2019-08-28 2019-08-28 Appareil de climatisation WO2021038735A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021541854A JP7150185B2 (ja) 2019-08-28 2019-08-28 空気調和装置
PCT/JP2019/033604 WO2021038735A1 (fr) 2019-08-28 2019-08-28 Appareil de climatisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/033604 WO2021038735A1 (fr) 2019-08-28 2019-08-28 Appareil de climatisation

Publications (1)

Publication Number Publication Date
WO2021038735A1 true WO2021038735A1 (fr) 2021-03-04

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JP (1) JP7150185B2 (fr)
WO (1) WO2021038735A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04187939A (ja) * 1990-11-21 1992-07-06 Matsushita Electric Ind Co Ltd 暖冷房機
JPH06117708A (ja) * 1992-06-23 1994-04-28 Orion Mach Co Ltd 冷凍サイクルにおける圧縮機の過負荷防止システム
JPH0914805A (ja) * 1995-06-29 1997-01-17 Sanyo Electric Co Ltd 空気調和機の保護装置
JPH109686A (ja) * 1996-04-24 1998-01-16 Daikin Ind Ltd 空気調和機
JP2001091022A (ja) * 1999-09-24 2001-04-06 Mitsubishi Electric Corp 空気調和機
JP2015035904A (ja) * 2013-08-09 2015-02-19 日立アプライアンス株式会社 サーモスイッチ付過負荷保護装置及び冷媒圧縮機
WO2019123545A1 (fr) * 2017-12-19 2019-06-27 三菱電機株式会社 Climatiseur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4187939B2 (ja) 2001-03-06 2008-11-26 パイオニア株式会社 スピーカの磁気回路

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04187939A (ja) * 1990-11-21 1992-07-06 Matsushita Electric Ind Co Ltd 暖冷房機
JPH06117708A (ja) * 1992-06-23 1994-04-28 Orion Mach Co Ltd 冷凍サイクルにおける圧縮機の過負荷防止システム
JPH0914805A (ja) * 1995-06-29 1997-01-17 Sanyo Electric Co Ltd 空気調和機の保護装置
JPH109686A (ja) * 1996-04-24 1998-01-16 Daikin Ind Ltd 空気調和機
JP2001091022A (ja) * 1999-09-24 2001-04-06 Mitsubishi Electric Corp 空気調和機
JP2015035904A (ja) * 2013-08-09 2015-02-19 日立アプライアンス株式会社 サーモスイッチ付過負荷保護装置及び冷媒圧縮機
WO2019123545A1 (fr) * 2017-12-19 2019-06-27 三菱電機株式会社 Climatiseur

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JP7150185B2 (ja) 2022-10-07
JPWO2021038735A1 (ja) 2021-12-23

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