Patent ID: 6209793
Filing Date: 2001-04-03
Classification: F25B

Abstract:
A thermostatic expansion valve included in a refrigeration cycle for expansion of a refrigerant which is contained in said refrigeration cycle, said thermostatic valve comprising:a refrigerant passage for guiding said refrigerant in a predetermined direction;a valve seat dividing said refrigerant passage into a high-pressure chamber and a low-pressure chamber;a valve body movably disposed in said high-pressure chamber for adjusting a flow of said refrigerant in cooperation with said valve seat;control means for controlling movement of said valve body in response to temperature of said refrigerant;a seat member placed between said high-pressure and said low-pressure chambers to be movable in said predetermined direction, said seat member being provided with said valve seat, wherein said scat member is kept in contact with said valve body when a pressure difference between said high-pressure chamber and said low pressure chamber is below a predetermined value; andurging means connected to said seat member for urging said seat member towards said high-pressure chamber.