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WO2021255816A1 - Climatiseur - Google Patents

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Publication number
WO2021255816A1
WO2021255816A1 PCT/JP2020/023544 JP2020023544W WO2021255816A1 WO 2021255816 A1 WO2021255816 A1 WO 2021255816A1 JP 2020023544 W JP2020023544 W JP 2020023544W WO 2021255816 A1 WO2021255816 A1 WO 2021255816A1
Authority
WO
WIPO (PCT)
Prior art keywords
outdoor
heat exchanger
defrosting
air
outdoor heat
Prior art date
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.)
Ceased
Application number
PCT/JP2020/023544
Other languages
English (en)
Japanese (ja)
Inventor
浩之 豊田
広 米田
浩伸 川村
禎夫 関谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Johnson Controls Air Conditioning Inc
Original Assignee
Hitachi Johnson Controls Air Conditioning Inc
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 Hitachi Johnson Controls Air Conditioning Inc filed Critical Hitachi Johnson Controls Air Conditioning Inc
Priority to JP2022531133A priority Critical patent/JP7341341B2/ja
Priority to PCT/JP2020/023544 priority patent/WO2021255816A1/fr
Publication of WO2021255816A1 publication Critical patent/WO2021255816A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles

Definitions

  • Patent Document 1 An example of defrosting using outdoor air for defrosting in this defrosting operation mode is described in International Publication No. 2017/145762 (Patent Document 1).
  • the air conditioner described in Patent Document 1 defrosts by using outdoor air as a heat source for melting frost, and the operation at this time is called "outside air defrosting operation”.
  • Patent Document 1 when the temperature of the outdoor air is higher than the freezing point, one of the two outdoor heat exchangers is used as a defrosting heat exchanger to allow the outdoor air to flow to defrost, while the other is not defrosted.
  • An air conditioner that evaporates the refrigerant with a heat exchanger and continues the heating operation is described.
  • the feature of the present invention is that the outdoor heat exchanger of the outdoor unit is divided into a plurality of parts, and each of the plurality of divided outdoor heat exchangers has a gas header, a liquid side distributor, and an outdoor expansion valve, and a plurality of them.
  • the outdoor heat exchangers divided into two are arranged side by side in the horizontal direction in the outdoor unit, and in the defrosting operation mode in the heating operation, the outdoor air is blown to both of the divided outdoor heat exchangers by the outdoor blower fan. If the temperature of the outdoor air is lower than the freezing point, close the outdoor expansion valve connected to the outdoor heat exchanger to be defrosted among the divided outdoor heat exchangers, and open the outdoor expansion valve. Only the fully closed outdoor heat exchanger is defrosted by the sublimation action of the outdoor air.
  • Air is flowing through the indoor heat exchanger 104 by an indoor fan 105, and the air takes heat of the refrigerant and is supplied to the room, thereby warming the room.
  • the refrigerant is cooled and liquefied.
  • the liquefied liquid refrigerant passes through the indoor expansion valve 106, passes through the liquid side connecting pipe 102, and flows to the liquid side blocking valve 14.
  • the first outdoor heat exchanger 20 corresponds to the first outdoor air blower fan 22, and the second outdoor heat exchanger 21 corresponds to the second outdoor air blower fan 23.
  • the outdoor heat exchangers 22 and 23 correspond to the outdoor heat exchanger. Outdoor air is flowed to 20 and 21. Further, an outside air temperature sensor 19 is arranged around the outside of the second outdoor heat exchanger 21 to detect the temperature of the outdoor air sucked by the outdoor blower fan 23.
  • Outdoor air is flowed through the first outdoor heat exchanger 20 and the second outdoor heat exchanger 21 by the first outdoor air blower fan 22 and the second outdoor air blower fan 23, and the refrigerant is the first outdoor heat exchanger 20.
  • the heat is reduced so that the temperature is lower than the temperature of the outdoor air flowing through the second outdoor heat exchanger 21. Therefore, in the first outdoor heat exchanger 20 and the second outdoor heat exchanger 21, the refrigerant absorbs the heat of the outdoor air and evaporates.
  • the outside air defrosting operation it is possible to judge that defrosting is completed when the amount of electric power during defrosting recovers before frost formation while the outdoor blower fan is maintained at the same rotation speed.
  • the electric energy of the outdoor blower fan after frost formation and before frost formation is obtained in advance. It can be used for the above-mentioned judgment based on these electric energy amounts.

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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

L'invention concerne un climatiseur capable d'une opération de dégivrage à l'air extérieur avec de l'air extérieur et de maintenance de capacité de chauffage même si la température de l'air extérieur est inférieure au point de congélation.　Dans le mode d'opération de dégivrage dans l'opération de chauffage, des ventilateurs de soufflante extérieurs (22, 23) soufflent de l'air vers les deux échangeurs de chaleur divisés (20, 21). En outre, si la température de l'air extérieur est inférieure au point de congélation, une soupape de détente (15, 16) raccordée à l'un des échangeurs de chaleur divisés (20, 21) est complètement fermée, et uniquement dans l'échangeur de chaleur avec la soupape de détente complètement fermée, un dégivrage est réalisé par une action de sublimation par l'air extérieur. Ceci permet le dégivrage au moyen d'air extérieur tout en poursuivant l'opération de chauffage même si la température de l'air extérieur est inférieure au point de congélation.
PCT/JP2020/023544 2020-06-16 2020-06-16 Climatiseur Ceased WO2021255816A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2022531133A JP7341341B2 (ja) 2020-06-16 2020-06-16 空気調和装置
PCT/JP2020/023544 WO2021255816A1 (fr) 2020-06-16 2020-06-16 Climatiseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/023544 WO2021255816A1 (fr) 2020-06-16 2020-06-16 Climatiseur

Publications (1)

Publication Number Publication Date
WO2021255816A1 true WO2021255816A1 (fr) 2021-12-23

Family

ID=79268634

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/023544 Ceased WO2021255816A1 (fr) 2020-06-16 2020-06-16 Climatiseur

Country Status (2)

Country Link
JP (1) JP7341341B2 (fr)
WO (1) WO2021255816A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04110576A (ja) * 1990-08-31 1992-04-13 Toshiba Corp ヒートポンプ式空気調和装置
JPH10281566A (ja) * 1997-04-01 1998-10-23 Mitsubishi Heavy Ind Ltd ヒートポンプ式空気調和機の室外ユニット
CN203550265U (zh) * 2013-07-15 2014-04-16 潘延龄 可不间断制冷的双蒸发器制冷装置
WO2015145714A1 (fr) * 2014-03-28 2015-10-01 日立アプライアンス株式会社 Climatiseur
JP2017003176A (ja) * 2015-06-09 2017-01-05 パナソニックＩｐマネジメント株式会社 冷凍装置及びそれを備えた冷蔵庫
WO2017006596A1 (fr) * 2015-07-06 2017-01-12 三菱電機株式会社 Dispositif à cycle de réfrigération
WO2017145762A1 (fr) * 2016-02-23 2017-08-31 三菱電機株式会社 Dispositif de pompe à chaleur et climatiseur associé

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04110576A (ja) * 1990-08-31 1992-04-13 Toshiba Corp ヒートポンプ式空気調和装置
JPH10281566A (ja) * 1997-04-01 1998-10-23 Mitsubishi Heavy Ind Ltd ヒートポンプ式空気調和機の室外ユニット
CN203550265U (zh) * 2013-07-15 2014-04-16 潘延龄 可不间断制冷的双蒸发器制冷装置
WO2015145714A1 (fr) * 2014-03-28 2015-10-01 日立アプライアンス株式会社 Climatiseur
JP2017003176A (ja) * 2015-06-09 2017-01-05 パナソニックＩｐマネジメント株式会社 冷凍装置及びそれを備えた冷蔵庫
WO2017006596A1 (fr) * 2015-07-06 2017-01-12 三菱電機株式会社 Dispositif à cycle de réfrigération
WO2017145762A1 (fr) * 2016-02-23 2017-08-31 三菱電機株式会社 Dispositif de pompe à chaleur et climatiseur associé

Also Published As

Publication number Publication date
JPWO2021255816A1 (fr) 2021-12-23
JP7341341B2 (ja) 2023-09-08

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