Title:
空調システム
Document Type and Number:
Japanese Patent JP6552939
Kind Code:
B2
Abstract:
An air conditioning system (1) includes a backup operation control unit (61A, 61B) configured to perform backup operation on an operational outdoor unit of a plurality of outdoor units (2A, 2B) when a compressor (10) of any of the plurality of outdoor units (2A, 2B) becomes non-operational; and the backup operation control unit (61A, 61B) is provided with a four-way selector valve synchronization control unit (62A, 62B) configured to operate a four-way selector valve (13) in backup operation to switch from a cooling cycle position to a heating cycle position, such that the four-way selector valve synchronization control unit (62A, 62B) operates the four-way selector valve (13) of the operational outdoor unit temporarily in a cooling cycle position so as to reduce a low pressure of the non-operational outdoor unit and to secure an operating pressure difference of the four-way selector valve (13) of the non-operational outdoor unit, and then operates the four-way selector valve (13) of the non-operational outdoor unit to switch to a heating cycle position, and subsequently operates the four-way selector valve (13) of the operational outdoor unit to switch to a heating cycle position, and synchronizes the four-way selector valves (13).
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Inventors:
Takahiro Kato
Application Number:
JP2015207928A
Publication Date:
July 31, 2019
Filing Date:
October 22, 2015
Export Citation:
Assignee:
Mitsubishi Heavy Industries Thermal Systems Co., Ltd.
International Classes:
F25B1/00; F24F11/30; F25B13/00
Domestic Patent References:
| JP2009144967A | ||||
| JP658654A | ||||
| JP1163738A | ||||
| JP2007263444A |
Foreign References:
| US20110162746 | ||||
| KR1020090067727A | ||||
| CN1987099A |
Attorney, Agent or Firm:
Noriharu Fujita
Miori Takao
Kawakami Miki
Daisuke Nagata
Miori Takao
Kawakami Miki
Daisuke Nagata