Title:
空気調和機
Document Type and Number:
Japanese Patent JP7005172
Kind Code:
B2
Abstract:
An air conditioner is provided, which is capable of accurately determining appropriateness of a refrigerant amount in a refrigerating cycle. A control apparatus is configured to: stop a cooling operation; set an expansion valve to a fully-closed state and, at the same time, switch the selector valve to change the direction, in which a refrigerant flows, to an opposite direction; operate a compressor to perform a refrigerant recovery operation, in which a refrigerant contained in an outdoor heat exchanger is recovered by an indoor heat exchanger; and determine the appropriateness of a refrigerant amount in a refrigerating cycle, based on at least one of a time required for recovering the refrigerant, a pressure change in a refrigerant suctioned by the compressor, and temperature of the refrigerant discharged from the compressor during the refrigerant recovery operation.
Inventors:
薛 ▲シュン▼
Koji Naito
Hiroaki Kaneko
Yasuda Gen
Koji Naito
Hiroaki Kaneko
Yasuda Gen
Application Number:
JP2017104460A
Publication Date:
January 21, 2022
Filing Date:
May 26, 2017
Export Citation:
Assignee:
Hitachi Johnson Controls Air Conditioning Co., Ltd.
International Classes:
F25B1/00; F25B49/02; F25B40/02
Domestic Patent References:
| JP9318141A | ||||
| JP2002106998A | ||||
| JP2015087071A | ||||
| JP2013108646A | ||||
| JP7101122B2 | ||||
| JP7159006A | ||||
| JP2012017881A | ||||
| JP2012117756A | ||||
| JP2017067428A | ||||
| JP5164437A |
Attorney, Agent or Firm:
Wilfort International Patent Office