Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2023/166708
Kind Code:
A1
Abstract:
This air conditioner performs both a space heating operation and a defrosting operation, and comprises a heat exchanger and a flow passage switching device. The heat exchanger causes heat to be exchanged between outdoor air and a refrigerant. The heat exchanger has a plurality of units arranged in a vertical direction. Each unit includes one or more heat transfer pipes that form a forked refrigerant flow passage in which a single passage comprising one refrigerant flow passage and a multiple passage comprising a plurality of refrigerant flow passages are connected together. During the defrosting operation, the flow passage switching device causes the refrigerant to flow from the multiple passage to the single passage, and during the space heating operation, the flow passage switching device causes the refrigerant to flow from the single passage to the multiple passage. The multiple passage of the lowermost unit disposed lowest among the plurality of units includes a first flow passage, being the refrigerant flow passage, in the forked refrigerant flow passage, of which an inlet for the refrigerant during the defrosting operation is positioned on the most upstream side in a flow direction of air. The inlet of the first flow passage is in a position that is lowest in the forked refrigerant flow passage.
Inventors:
KAMADA TOSHIMITSU (JP)
TAKAGI JUMPEI (JP)
TAKAGI JUMPEI (JP)
Application Number:
PCT/JP2022/009409
Publication Date:
September 07, 2023
Filing Date:
March 04, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F28F9/02; F28F9/26
Foreign References:
| JP2016114263A | 2016-06-23 | |||
| JP2016084970A | 2016-05-19 | |||
| JP2009257741A | 2009-11-05 | |||
| JP2021017991A | 2021-02-15 | |||
| JP2015140990A | 2015-08-03 | |||
| JP2014115005A | 2014-06-26 | |||
| JPH07113555A | 1995-05-02 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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