Abstract: Disclosed is a refrigerant circuit which comprises a compressor (15), a water heat exchanger (16), a receiver (18), an expansion valve (19), and an evaporator (20). In the refrigerant circuit, a refrigerating cycle is carried out by compressing refrigerant to above a critical pressure in the compressor (15). A cooling section (17) for cooling refrigerant flowing out of the water heat exchanger (16) is provided on the upstream side of the receiver (18). A part of the evaporator (20) functions as an air heat exchanger which operates as the cooling section (17). The cooling section (17) exchanges heat with refrigerant on the outlet side of the evaporator (20).

Abstract: Disclosed is a refrigerant circuit which comprises a compressor (15), a water heat exchanger (16), a receiver (18), an expansion valve (19), and an evaporator (20). In the refrigerant circuit, a refrigerating cycle is carried out by compressing refrigerant to above a critical pressure in the compressor (15). A cooling section (17) for cooling refrigerant flowing out of the water heat exchanger (16) is provided on the upstream side of the receiver (18). A part of the evaporator (20) functions as an air heat exchanger which operates as the cooling section (17). The cooling section (17) exchanges heat with refrigerant on the outlet side of the evaporator (20).

Abstract: Disclosed is a signal processor for an ultrasonic fish detector, in which the signal processing circuit is arranged separately from the display unit, whereas conventionally both are configured integrally, within a case with the provision of a composite converting circuit and RGB converting circuit with associated video output terminal and RGB output terminal, thereby allowing the user to configure a fish detection system by merely purchasing the fish detection signal processor made up of the signal processing circuit and a transducer and utilizing a home television set or an RGB graphics monitor oriented to personal computers.