Patent ID: 7536872

Claim:
A high pressure control valve, arranged in a refrigerant passage extending from an internal heat exchanger to an evaporator in a refrigerating cycle, in which refrigerant, a pressure of which is a supercritical pressure, is used, having the internal heat exchanger in which heat exchange is conducted between the refrigerant at an outlet of a radiator and the refrigerant sucked into a compressor, the high pressure control valve controlling refrigerant pressure on an internal heat exchanger outlet side by adjusting a degree of opening of a valve port according to a temperature of the refrigerant at the outlet of the radiator, the high pressure control valve comprising: a temperature sensing section, an inner pressure of which is changed according to a refrigerant temperature between the outlet of the radiator and an inlet of the internal heat exchanger; a valve body for adjusting the degree of opening of the valve port being mechanically linked with a change in the inner pressure of the temperature sensing section; and a body for accommodating the valve body, wherein a charging density of charging the refrigerant into the temperature sensing section is equal to or greater than 200 kg/m 3 and less than 450 kg/m 3 under a condition that the valve body is closed.