Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2021/255816
Kind Code:
A1
Abstract:
Provided is an air conditioner capable of outside air defrosting operation with outside air and maintenance of heating capacity even if the temperature of the outside air is lower than the freezing point. In the defrosting operation mode in the heating operation, outdoor blower fans (22, 23) blow air to both of divided heat exchangers (20, 21). Furthermore, if the temperature of outdoor air is lower than the freezing point, an expansion valve (15, 16) connected to one of the divided heat exchangers (20, 21) is fully closed, and only in the heat exchanger with the expansion valve fully closed, defrosting is performed by sublimation action by outdoor air. This enables defrosting using outdoor air while continuing the heating operation even if the temperature of the outdoor air is lower than the freezing point.
Inventors:
TOYODA HIROYUKI (JP)
MAITA HIROSHI (JP)
KAWAMURA HIRONOBU (JP)
SEKIYA SACHIO (JP)
MAITA HIROSHI (JP)
KAWAMURA HIRONOBU (JP)
SEKIYA SACHIO (JP)
Application Number:
PCT/JP2020/023544
Publication Date:
December 23, 2021
Filing Date:
June 16, 2020
Export Citation:
Assignee:
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC (JP)
International Classes:
F25B47/02
Domestic Patent References:
| WO2017006596A1 | 2017-01-12 | |||
| WO2015145714A1 | 2015-10-01 | |||
| WO2017145762A1 | 2017-08-31 |
Foreign References:
| JPH04110576A | 1992-04-13 | |||
| JP2017003176A | 2017-01-05 | |||
| JPH10281566A | 1998-10-23 | |||
| CN203550265U | 2014-04-16 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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