JP2006003056A5 - - Google Patents

Claims (17)

A valve body, a valve chamber with a bottom formed in said valve body, an opening which opens at the upper end of the valve body with is formed upward from the valve chamber, is formed in the valve body the A first passage for introducing a high-pressure refrigerant into the valve chamber; a second passage formed in the valve body through which the refrigerant sent to the evaporator passes; and a passage formed in the valve body and fed from the evaporator side. A third passage through which the refrigerant passes, an orifice portion that is mounted in the opening and has a throttle portion that throttles the refrigerant flowing from the valve chamber toward the second passage, and the orifice portion so as to face the throttle portion A valve body disposed in the valve chamber; an operating rod that is inserted into the opening to move the valve body; a drive device that is mounted on an upper end of the valve body and drives the operating rod; and is mounted in the opening. and a guide member for guiding the operating rod slidably, Kibentai, the orifice portion, the guide member, the expansion valve, characterized in that the actuating rod and from above of the valve body so as to insert-fitted into the valve body. The expansion valve according to claim 1, wherein the orifice portion is formed integrally with the guide member . The expansion valve according to claim 1, wherein the guide member is caulked and fixed to the valve body . The expansion valve according to claim 1 , wherein the guide member includes a positioning portion for positioning the guide member at a predetermined position of the valve body in cooperation with the valve body . The expansion valve according to claim 4 , wherein the positioning portion includes a step portion formed integrally with the guide member . The expansion valve according to claim 1 , wherein the orifice portion is press-fitted into the valve body . The expansion valve according to claim 5 , wherein the stepped portion is in contact with the valve main body while maintaining a sealing property . The expansion valve according to claim 7 , wherein a contact portion of the step portion with the valve body is in surface contact with the valve body . The expansion valve according to claim 2 , wherein a positioning portion for positioning the guide member with respect to the valve main body is configured by the orifice portion and the valve main body . The expansion valve according to claim 9 , wherein the positioning portion includes a step portion formed integrally with the valve body . The expansion valve according to claim 9 or 10 , wherein the guide member is fixed by caulking to the valve body . The guide member, the expansion valve according to any one of claims 1 to 11, characterized in that it comprises a vibration-proof member for preventing vibration of the actuating rod. 13. The vibration isolating member is embedded in the guide member, and at least a part of a portion of the guide member that includes the anti-vibration member is disposed in the third passage. Expansion valve. The expansion valve according to any one of claims 1 to 13 , wherein a seal groove is formed on an outer periphery of the orifice portion, and a ring seal is attached to the seal groove . The opening communicates with the third passage and has an upper end as a driving device mounting hole for mounting the driving device, and an annular groove and a female screw portion are formed on the inner periphery of the driving device mounting hole. The drive device has a can body fixed to the drive device mounting hole, and the can body is integrally formed with a cylindrical mounting seat that fits into the drive device mounting hole. the female screw portion externally threaded portion to be screwed is formed in, claim 1 to claim in said annular groove, characterized in that the sealing member in close contact with the outer peripheral surface of the mounting seat is positioned 14 The expansion valve according to any one of the above. The expansion valve according to claim 15 , wherein the seal member is an O-ring . The can body is equipped with a diaphragm that senses and displaces the temperature of the refrigerant delivered from the evaporator, and a stopper member that transmits the displacement of the diaphragm to the operating rod, and one end of the operating rod is The expansion valve according to claim 15, wherein the expansion valve is connected to the stopper member and a tip of the other end of the operating rod is in contact with the valve body.