Title:
REFRIGERATION CYCLE CONTROL METHOD IN LIQUID COOLING DEVICE, AND LIQUID COOLING DEVICE
Document Type and Number:
Japanese Patent JP2733195
Kind Code:
B2
Abstract:
PURPOSE: To prevent a liquid back phenomenon of refrigerants and damage of a compressor by driving a compressor while closing both a cooling solenoid valve and a heating solenoid valve respectively until the pressure on a lower pressure side drops during the starting of a refrigeration cycle and then transferring the operation to temperature control based on a detected water temperature.
CONSTITUTION: In case when a lower pressure side-pressure is lower, a lower pressure switch 30 is turned off and a water temperature detection means 14 is turned on. Therefore, a control device 16 drives a compressor 18 with a cooling solenoid valve 23 in an opened state and, with a heating solenoid valve 25 in a closed state. A tank 1 is cooled with an evaporator 24 in a cooler 2. When the water temperature drops and the water temperature detection means 14 is turned off, the control means 16 opens the heating solenoid valve 25 and closes the cooling solenoid valve 23, thereby heating the tank 1 with the evaporator 24. When the lower pressure side-pressure is increased, the control means 16 drives the compressor 18 with each of the solenoid valves 23 and 25 in a closed state irrespective of the output of the water temperature means 14. This construction makes it possible to move the refrigerants on the lower pressure side to the high pressure side, thereby preventing the generation of a liquid back phenomenon.
Inventors:
FUJISAWA HIROKAZU
HOYA YOSHIHIKO
HOYA YOSHIHIKO
Application Number:
JP31892493A
Publication Date:
March 30, 1998
Filing Date:
November 25, 1993
Export Citation:
Assignee:
ORION KIKAI KK
International Classes:
F25D13/00; F25B1/00; F28D1/06; (IPC1-7): F25B1/00
Attorney, Agent or Firm:
Tsuneyuki Inaki (1 person outside)