COOLING DEVICE AND METHOD FOR CONROLLING COOLING DEVICE

WIPO Patent Application WO/2023/021660

A1

The purpose of the present invention is to prevent the occurrence of cavitation in a refrigerant pump due to the reduction in a net positive suction head in a cooling device.　A cooling device according to the present invention uses a refrigeration cycle of circulating a refrigerant among a heat receiver (1), a compressor (2), a radiator (3), and an expander (4). The cooling device is characterized by comprising: a tank (5) in which a refrigerant supplied from the expander (4) is separated into a gas phase and a liquid phase; a pump (6) that feeds the liquid phase refrigerant separated in the tank (5) to the heat receiver (1); and a control unit (7) that controls the amount of pressure rise of the compressor 2 in the refrigeration cycle. Further, the cooling device is characterized in that the control unit (7) raises pressure in the compressor (2) by limiting a net positive suction head value of the pump (6) not to be equal to or lower than a prescribed value.

WO/2007/039951	REFRIGERATING/AIR-CONDITIONING DEVICE
WO/2015/056477	AIR CONDITIONING DEVICE
JP6266089	Air-conditioner

OHTSUKA TAKASHI (JP)
TODOROKI KOICHI (JP)
MIYAMOTO YOSHINORI (JP)
CHIBA MASAKI (JP)
HACHIYA MAHIRO (JP)
YOSHIKAWA MINORU (JP)

PCT/JP2021/030413

February 23, 2023

August 19, 2021

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NEC CORP (JP)

F25B43/00; F25B1/00; F25B41/40

WO2005050104A1	2005-06-02
WO2018056201A1	2018-03-29

JP2017020687A	2017-01-26
JP2011196607A	2011-10-06
JP2021076364A	2021-05-20
JP2019174001A	2019-10-10
JP2021076364A	2021-05-20

TANAI Sumio et al. (JP)

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