US 11,938,783 B2
Refrigeration cycle device
Kengo Sugimura, Kariya (JP); Satoshi Ito, Kariya (JP); Satoshi Suzuki, Kariya (JP); and Kosuke Shiratori, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Jul. 20, 2021, as Appl. No. 17/380,774.
Application 17/380,774 is a continuation of application No. PCT/JP2020/001336, filed on Jan. 16, 2020.
Claims priority of application No. 2019-022196 (JP), filed on Feb. 11, 2019.
Prior Publication US 2021/0347224 A1, Nov. 11, 2021
Int. Cl. F25B 41/20 (2021.01); B60H 1/00 (2006.01); B60H 1/32 (2006.01); B60L 58/26 (2019.01); F25B 25/00 (2006.01); F25B 49/02 (2006.01)
CPC B60H 1/00278 (2013.01) [B60H 1/00878 (2013.01); B60H 1/323 (2013.01); B60L 58/26 (2019.02); F25B 25/005 (2013.01); F25B 41/20 (2021.01); F25B 49/02 (2013.01); B60H 2001/00307 (2013.01); B60H 2001/00928 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A refrigeration cycle device comprising:
a compressor configured to draw and discharge a refrigerant;
a radiator configured to dissipate heat from the refrigerant discharged from the compressor;
a first pressure reducing valve configured to reduce a pressure of the refrigerant flowing from the radiator;
a first evaporator configured to exchange heat between the refrigerant decompressed in the first pressure reducing valve and air, and to evaporate the refrigerant;
a second pressure reducing valve disposed in parallel with the first pressure reducing valve in a flow of the refrigerant and configured to reduce the pressure of the refrigerant flowing from the radiator;
a second evaporator configured to evaporate the refrigerant pressure-reduced in the second pressure reducing valve, by absorbing heat from a battery;
a third pressure reducing valve configured to reduce the pressure of the refrigerant evaporated in the second evaporator; and
a controller configured to control opening degrees of the second pressure reducing valve and the third pressure reducing valve, wherein
the controller is configured to perform a limit control in which an opening degree of the second pressure reducing valve or the third pressure reducing valve is set at a smaller one of a battery cooling opening degree and an air cooling opening degree, the battery cooling opening degree being an opening degree for setting a battery cooling capacity of the second evaporator to a target battery cooling capacity, and the air cooling opening degree being an opening degree for setting an air cooling capacity of the first evaporator to a target air cooling capacity, and
in the limit control, the controller controls the opening degree of the second pressure reducing valve to the smaller one of the air cooling opening degree and the battery cooling opening degree, and controls the opening degree of the third pressure reducing valve such that a degree of superheat of the refrigerant on an outlet side of the second evaporator approaches a target degree of superheat.