To avoid the pressure loss of a refrigerant by equipping an auxiliary heat absorber with a bypass circuit and at the same time performing control so that the refrigerant passes through a bypass circuit when the pressure of the refrigerant flowing into the auxiliary heat absorber becomes higher than a setting value.
An auxiliary heat absorber 8 is provided with a bypass circuit 80, and control is made so that a refrigerant passes through the bypass circuit when at least pressure that is equal to or more than a setting value is detected. Also, when the pressure of the refrigerant flowing into the auxiliary heat absorber 8 reaches a setting value or less, a liquid refrigerant is supplied from a supercooler 6 to the auxiliary heat absorber 8. On the other hand, when the temperature of the discharge refrigerant of a compressor 2 reaches a setting value or higher, the liquid refrigerant is supplied from the supercooler 6 to the auxiliary heat absorber 8.
IMURA TAKEO
OTA YOSHIKAZU
SUGIMORI KEIJI
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