US 12,442,549 B2
Air conditioner
Atsushi Yoshimi, Osaka (JP); Takuro Yamada, Osaka (JP); Eiji Kumakura, Osaka (JP); Ikuhiro Iwata, Osaka (JP); and Takeru Miyazaki, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Mar. 29, 2022, as Appl. No. 17/707,466.
Application 17/707,466 is a continuation of application No. PCT/JP2020/029351, filed on Jul. 30, 2020.
Claims priority of application No. 2019-180598 (JP), filed on Sep. 30, 2019; and application No. 2019-180599 (JP), filed on Sep. 30, 2019.
Prior Publication US 2022/0221168 A1, Jul. 14, 2022
Int. Cl. F24F 5/00 (2006.01); F25B 1/10 (2006.01); F25B 5/04 (2006.01); F25B 6/04 (2006.01); F25B 13/00 (2006.01); F25B 43/00 (2006.01)
CPC F24F 5/001 (2013.01) [F24F 5/0035 (2013.01); F25B 1/10 (2013.01); F25B 5/04 (2013.01); F25B 6/04 (2013.01); F25B 13/00 (2013.01); F25B 43/006 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An air conditioner comprising a compressor, a first heat-source-side heat exchanger, a second heat-source-side heat exchanger, a use-side heat exchanger, an ejector that raises a pressure of refrigerant by using energy for refrigerant decompression and expansion, an expansion valve, and a switching valve, wherein
the switching valve switches between a refrigerant flow in a first operation and a refrigerant flow in a second operation,
in the first operation, the refrigerant compressed by the compressor radiates heat in the use-side heat exchanger and is decompressed and expanded by the ejector while the refrigerant evaporated in the first heat-source-side heat exchanger is raised in pressure by the ejector, and
in the second operation, the refrigerant compressed by the compressor radiates heat in the first heat-source-side heat exchanger and is decompressed and expanded by the expansion valve before being evaporated in the use-side heat exchanger while the refrigerant does not flow through the ejector,
the switching valve is configured such that in the first operation, the refrigerant compressed by the compressor radiates heat in the use-side heat exchanger and is decompressed and expanded by the ejector while the refrigerant decompressed and expanded by the expansion valve and then evaporated in the first heat-source-side heat exchanger is raised in pressure by the ejector and the refrigerant raised in pressure by the ejector is further evaporated in the second heat-source-side heat exchanger, wherein the refrigerant decompressed and expanded by the expansion valve flows sequentially through the first heat-source-side heat exchanger, the ejector and the second heat-source-side heat exchanger, and
the switching valve is configured such that in the second operation, the refrigerant compressed by the compressor radiates heat in the first heat-source-side heat exchanger and the second heat-source-side heat exchanger and is decompressed and expanded by the expansion valve before being evaporated in the use-side heat exchanger while the refrigerant does not flow through the ejector.