Patent ID: 6776351
Filing Date: 2004-08-17
Classification: F25B

Abstract:
An expansion valve to be equipped in an air conditioner to control the flow of a refrigerant, comprising:a housing with a refrigerant path to which is connected a pipe communicated with various devices of the air conditioner; and a cassette unit inserted to the housing; the cassette unit comprising a flange member; a tube member formed integrally with the flange member; a guide member, an orifice member and an adjustment plate member fixed to an interior of the tube member; a valve member disposed within a valve chamber defined by the orifice member; a spring disposed between the adjustment plate member defining the valve chamber and the valve member, biasing the valve member toward the orifice member; a shaft member for driving the valve member; a lid member welded onto the flange member; a diaphragm sandwiched between the lid member and the flange member and defining a gas charge chamber; and a stopper for transmitting a displacement of the diaphragm to the shaft member; the housing further comprising an internal thread formed to a bottom of an inner bore portion for mounting the cassette unit; and the cassette unit further comprising an external thread formed to an outer circumference of the adjustment plate member.