Thermodynamic expansion valve

Abstract

A kind of heating-power bulgy valve, including: the body of the valve, on the body of the valve, there are the high voltage passageway, the low voltage passageway and the valve port for the high voltage passageway; the spool, it is close to and pressed to the valve port by a spring; temperature package, it has a airtight room what is composed by membrane; The valve handle, one of its ends poling the spool away from the valve port, another end is droved by membrane; the character is that the temperature package locates on the low voltage passageway. Because of that, it compares to the existing technical, can make the heating-power bulgy valve smaller, so it can insure the special freedom in the refrigerant cycle.

Description

technical field

[0001] The present invention relates to an expansion valve for controlling the flow rate of refrigerant sent to an evaporator in refrigerating cycles such as air conditioners and refrigerating devices. Background technique

[0002] Existing expansion valves are generally formed on the valve body with a high-pressure passage for passing high-pressure refrigerant to the evaporator and a low-pressure passage for sending low-pressure refrigerant from the evaporator, and a valve port on the high-pressure passage. The valve core is spring-pressed toward the valve port, and the valve body is fixed with a temperature-sensing package that senses the temperature and pressure changes of the low-pressure refrigerant. The valve stem is supported between the diaphragm and the valve core. When the low-pressure refrigerant When the temperature and pressure change, the diaphragm action of the temperature sensing package drives the valve stem to change ...

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