US 11,656,016 B2
Cooling system that comprises multiple cooling apparatus and reduces power consumption
Akihiro Ito, Aichi (JP); Norio Kokubo, Aichi (JP); Masayuki Kouketsu, Aichi (JP); Isahiro Hasegawa, Aichi (JP); Toshiharu Nakazawa, Tokyo (JP); Keisuke Takanashi, Tokyo (JP); and Yukihiro Fukusumi, Tokyo (JP)
Assigned to EBARA REFRIGERATION EQUIPMENT & SYSTEMS CO., LTD., Tokyo (JP)
Filed by CKD CORPORATION, Aichi (JP); EBARA CORPORATION, Tokyo (JP); and EBARA REFRIGERATION EQUIPMENT & SYSTEMS CO., LTD., Tokyo (JP)
Filed on Nov. 20, 2020, as Appl. No. 17/100,191.
Claims priority of application No. JP2019-209956 (JP), filed on Nov. 20, 2019.
Prior Publication US 2021/0148621 A1, May 20, 2021
Int. Cl. F25B 49/02 (2006.01); F25B 31/02 (2006.01); F25B 41/20 (2021.01); F25B 7/00 (2006.01)
CPC F25B 49/022 (2013.01) [F25B 31/02 (2013.01); F25B 41/20 (2021.01); F25B 7/00 (2013.01); F25B 2400/0401 (2013.01); F25B 2600/0251 (2013.01); F25B 2600/2519 (2013.01); F25B 2700/151 (2013.01); F25B 2700/21 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cooling system comprising:
a first cooling apparatus that is electrically driven and supplies a first heat transfer medium cooled to a first set temperature or lower;
a plurality of second cooling apparatuses, each of which:
comprises a heat exchanger that exchanges heat between the first heat transfer medium supplied from the first cooling apparatus and a second heat transfer medium, and
is electrically driven and supplies a third heat transfer medium cooled to a second set temperature or lower, wherein the second set temperature changes over time; and
a processor that obtains current second set temperatures of the second cooling apparatuses and variably sets the first set temperature based on the obtained current second set temperatures,
wherein each of the second cooling apparatuses further comprises:
a compressor that is electrically driven and compresses the second heat transfer medium in a gas state;
a bypass flow passage through which the second heat transfer medium flows while bypassing the compressor; and
an on-off valve that opens and closes the bypass flow passage,
wherein the processor sets the first set temperature to a stop temperature that allows a target second cooling apparatus, having a highest second set temperature among the obtained current second set temperatures, to supply the third heat transfer medium cooled to the highest second set temperature or lower in a state where the compressor is stopped and the on-off valve is opened, and
wherein the processor stops the compressor and opens the on-off valve in the target second cooling apparatus.