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Title:
OUTDOOR UNIT FOR REFRIGERATION DEVICE AND REFRIGERATION DEVICE EQUIPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/162730
Kind Code:
A1
Abstract:
A refrigeration device (100) comprises: a first refrigerant circuit (103) in which a first refrigerant circulates; a second refrigerant circuit (104) in which a second refrigerant circulates; and a four-way valve (7) that switches the circulation direction of the first refrigerant between a freezing mode and a defrosting mode. A fourth heat exchanger (214) in the second refrigerant circuit (104) exchanges heat between the second refrigerant, and the first refrigerant flowing between a second heat exchanger (2) and a first expansion valve (3). A liquid receiver (8) is installed between the fourth heat exchanger (214) and the first expansion valve (3) in the first refrigerant circuit (103). A bypass flow path (37) bypasses the liquid receiver (8) in the defrosting mode and allows the first refrigerant to flow from the first expansion valve (3) toward the second heat exchanger (2). In the defrosting mode, a control device (50) controls the second refrigerant circuit (104) to lower the evaporation temperature of the second refrigerant in the fourth heat exchanger (214) in response to the pressure of the first refrigerant circulating in the first refrigerant circuit (103) exceeding a threshold value.

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Inventors:
EGAMI, Makoto (JP)
ISHIHARA, Nobuya (JP)
YASHIRO, Takanori (JP)
Application Number:
PCT/JP2021/002620
Publication Date:
August 04, 2022
Filing Date:
January 26, 2021
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (JP)
International Classes:
F25B47/02
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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