Thermal valve for compressor

摘要

A temperature control system and a thermal valve for said system composed of a housing having a gas inlet port connected to the refrigerant return line and a gas outlet port disposed in a compressor interior. A helical thermostat metal coil is fixed within and at one end of the housing, the other end of the coil being free to rotate with change in temperature. The thermostat metal for the coil is preferably chosen so that no movement thereof takes place until some predetermined temperature is reached, at which temperature rotation of the free coil end commences. The free coil end, either along or in conjunction with a baffle or the like, normally blocks the gas inlet port and prevents refrigerant gas from entering the housing and passing therethrough onto the compressor motor. When the motor within the compressor heats up to the predetermined temperature, the thermostat metal helical coil proceeds to rotate and moves the end thereof or baffle attached to the end thereof away from the gas inlet port and permits refrigerant gas to enter the housing and pass therethrough to cool the motor therein. When the motor within the compressor is cooled below the predetermined temperature, the thermostat metal coil will have rotated in the opposite direction to again close off the fluid inlet port. In this way, the refrigerant gas is applied to the compressor motor only under conditions of overheating.