Patent ID: 6532753
Filing Date: 2003-03-18
Classification: F25B

Abstract:
The process of preventing noise caused as refrigerant passage a noise inside an expansion valve, characterized in that said expansion valve comprises a valve body, a valve chamber formed inside said valve body to which a refrigerant enters from a passage where a high-pressure refrigerant being transmitted to an evaporator travels, said passage having a smallest diameter portion and in direct contact with a corner portion of said valve chamber, a valve means positioned inside said valve chamber for adjusting said refrigerant, said valve means being driven according to the temperature of a low-pressure refrigerant transmitted from said evaporator to a compressor, wherein said valve chamber has a throttle portion formed by the interference of said valve chamber and said passage, said high-pressure refrigerant flowing into said valve chamber through said throttle portion, and a wall portion is formed adjacent to said throttle portion at the smallest portion of said passage.