US 12,130,062 B2
Refrigeration device, temperature sensor mounting pipe, and temperature sensor mounting structure
Takashi Toyooka, Saitama (JP); and Minoru Suto, Gunma (JP)
Assigned to PHC HOLDINGS CORPORATION, Tokyo (JP)
Filed by PHC Holdings Corporation, Tokyo (JP)
Filed on Jan. 14, 2022, as Appl. No. 17/575,972.
Application 17/575,972 is a continuation of application No. PCT/JP2020/024671, filed on Jun. 23, 2020.
Claims priority of application No. 2019-132820 (JP), filed on Jul. 18, 2019; and application No. 2019-132828 (JP), filed on Jul. 18, 2019.
Prior Publication US 2022/0136752 A1, May 5, 2022
Int. Cl. F25B 7/00 (2006.01); F25B 49/02 (2006.01)
CPC F25B 49/022 (2013.01) [F25B 7/00 (2013.01); F25B 2313/031 (2013.01); F25B 2700/2103 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A refrigeration apparatus comprising:
a high-temperature side refrigerant circuit including a high-temperature side compressor, the high-temperature side refrigerant circuit being a circuit in which high-temperature side refrigerant circulates;
a low-temperature side refrigerant circuit including a low-temperature side compressor, the low-temperature side refrigerant circuit being a circuit in which low-temperature side refrigerant circulates;
a cascade heat exchanger configured to cool the low-temperature side refrigerant by using the high-temperature side refrigerant; and
a controller, wherein:
in the low-temperature side refrigerant circuit, a low-temperature side decompressor is disposed on a downstream of the cascade heat exchanger, and a temperature sensor is installed at a pipe part between the cascade heat exchanger and the low-temperature side decompressor,
the temperature sensor is installed in a temperature sensor attaching pipe,
the temperature sensor attaching pipe extends in a first direction and includes:
a sealed first end part;
a sealed second end part;
a first pipe part extending from the sealed first end part;
a second pipe part extending from the sealed second end part; and
a constricted part disposed between and connected to the first pipe part and the second pipe part along the first direction and having an internal distance measured in a second direction perpendicular to the first direction smaller than an internal distance of the first pipe part measured in the second direction,
an end portion of the temperature sensor, which is closest to the second pipe part, is in contact with a part of the constricted part, which is closer to the first pipe than a center of the constricted part,
the constricted part comprises two convex portions facing each other, and
wherein the controller controls at least one of the high-temperature side compressor and the low-temperature side compressor on a basis of a detection value of the temperature sensor.