US 12,085,320 B2
Heat source unit and refrigeration apparatus
Masaaki Takegami, Osaka (JP); Akitoshi Ueno, Osaka (JP); and Naoto Kimura, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Sep. 29, 2023, as Appl. No. 18/375,151.
Application 18/375,151 is a continuation of application No. PCT/JP2022/010817, filed on Mar. 11, 2022.
Claims priority of application No. 2021-057802 (JP), filed on Mar. 30, 2021; and application No. 2021-190691 (JP), filed on Nov. 25, 2021.
Prior Publication US 2024/0027116 A1, Jan. 25, 2024
Int. Cl. F25B 49/02 (2006.01); F25B 1/04 (2006.01); F25B 40/02 (2006.01); F25B 40/06 (2006.01)
CPC F25B 49/02 (2013.01) [F25B 1/04 (2013.01); F25B 40/02 (2013.01); F25B 40/06 (2013.01); F25B 2600/2513 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A heat source unit connected to a utilization unit and configured to perform a refrigeration cycle by circulating a primary refrigerant between the heat source unit and the utilization unit, a maximum pressure of the primary refrigerant in the refrigeration cycle being higher than or equal to a critical pressure of the primary refrigerant,
the heat source unit comprising:
a compressor configured to suck and compress the primary refrigerant;
a first heat exchanger configured to exchange heat between the primary refrigerant and outdoor air;
a first expansion valve configured to decompress the primary refrigerant that has flowed out of the first heat exchanger functioning as a radiator;
a receiver configured to receive the primary refrigerant that has flowed out of the first heat exchanger functioning as a radiator and passed through the first expansion valve;
a first cooler configured to cool the primary refrigerant flowing from the receiver toward the utilization unit;
a second cooler configured to cool the primary refrigerant flowing from the first heat exchanger functioning as a radiator toward the first expansion valve, using a coolant other than the outdoor air; and
a controller configured to control cooling capability of the second cooler so that a gas refrigerant contained in the primary refrigerant flowing into the receiver after passing through the first expansion valve decreases compared to a case in which the second cooler does not cool the primary refrigerant.