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Patent Searching and Data


Title:
OUTDOOR UNIT AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/048901
Kind Code:
A1
Abstract:
An outdoor unit (2) is provided with: a first flow channel (F1); a second flow channel (F2); a second expansion device (71), a liquid receiver (73), and a flow-regulating valve (72) positioned in the second flow channel (F2) in order from a branch point; a heat exchanger (30); and a control device (100). The heat exchanger (30) performs heat exchange between a refrigerant flowing through a first passage (H1) and a refrigerant flowing through a second passage (H2). If a pump-down operation for recovering refrigerant to the liquid receiver (73) is started, the control device (100): controls, at a first time point, a control state of a compressor (10) and the flow-regulating valve (72) to a first state in which the flow-regulating valve (72) is closed while the compressor (10) is operated; and transitions, at a second time point in the pump-down operation subsequent to the first time point, the control state from the first state to a second state in which the flow-regulating valve (72) is opened while the compressor (10) is operated.

Inventors:
ISHIKAWA TOMOTAKA (JP)
ARII YUSUKE (JP)
HAYASAKA MOTOSHI (JP)
Application Number:
PCT/JP2019/035373
Publication Date:
March 18, 2021
Filing Date:
September 09, 2019
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00
Domestic Patent References:
WO2017175299A12017-10-12
Foreign References:
JP2009156531A2009-07-16
JP2014102008A2014-06-05
JP2019074222A2019-05-16
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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