A bulbless expansion valve including a valve body, a valve member, a power element, and a thermal sensor including an enclosure operatively mounted to the valve body. The power element includes a diaphragm having a first side operatively coupled to the valve member, and a second side that together with the sensor enclosure forms at least part of a sensing chamber containing sensing fluid such that the sensing fluid is in communication with the second side of the diaphragm. The first side of the diaphragm may be fluidly coupled to an operating line, such as a suction line, to communicate temperature and pressure to the first side of the diaphragm, thereby providing heat transfer with the sensing fluid on the opposite side. Temperature changes of the sensing fluid results in pressure changes applied to the diaphragm causing movement of the valve member to control flow of the operating fluid.

An ejector includes a shaft coupled to a passage formation member defining a refrigerant passage inside a body, and the shaft is slidably supported by a support member fixed to the body. A drive mechanism moves the shaft in an axial direction to change a passage sectional area of the refrigerant passage. The passage formation member is provided with a vibration suppressive member including a first mobile end that applies a load to enlarge the refrigerant passage and a second mobile end that applies a load to narrow the refrigerant passage. Both the first mobile end and the second mobile end are disposed on a same side of a slide region of the support member in the axial direction.

A thermostatic expansion valve includes an operating rod, a recessed receiver portion, and a first metering pin positioned at least partially within the receiver portion to selectively contact the operating rod. The first metering pin includes a base diameter, an overall length, and a taper portion. The taper portion is tapered at a specified degree relative to a longitudinal axis of the first metering pin. The thermostatic expansion valve is adapted to operate at a first specified refrigeration tonnage when the first metering pin is positioned at least partially within the receiver portion, and to operate at a second specified refrigeration tonnage when the first metering pin is replaced with a second metering pin including a different taper portion than the first metering pin.

It is an object of the present invention to provide an expansion valve with an improved ring spring. Accordingly, in the present invention, the expansion valve includes a valve body including a valve chamber, a valve element disposed in the valve chamber, a biasing member configured to bias the valve element toward a valve seat, an actuation rod that presses the valve element in a valve opening direction against a biasing force of the biasing member, and a ring spring disposed between an outer circumferential surface of the actuation rod and an inner circumferential surface of the valve body. The ring spring includes a ring portion, at least three elastic protrusion portions that protrude inward from the ring portion and contact the outer circumferential surface of the actuation rod, and at least one outward protrusion portion that protrudes outward from the ring portion and contacting the inner circumferential surface of the valve body.

An expansion assembly for use with a heat exchanger includes a block thermal expansion valve; and a distributor directly connected to the block thermal expansion valve; wherein the distributor comprises a tube having a plurality of openings formed therein.

An air conditioner (10) includes a refrigerant circuit (13) and refrigerant. The refrigerant circuit (13) has a compressor (1), a condenser (2), a pressure-regulating valve (3), and an evaporator (4). The refrigerant is R32. The pressure-regulating valve (3) includes a flow path (33) causing the refrigerant flowing from the condenser (2) to flow to the evaporator (4), a pressure reference chamber (S2) partitioned from the flow path (33) and filled with inert gas, and a valve portion (34) disposed in the flow path (33). The pressure-regulating valve (3) is configured to adjust a degree of opening of the valve portion (34) to adjust a flow rate of the refrigerant flowing through the flow path (33). The valve portion (34) is configured to increase the degree of opening when a pressure in the flow path (33) is higher than a pressure in the pressure reference chamber (S2), and reduce the degree of opening when the pressure in the flow path (33) is lower than the pressure in the pressure reference chamber (S2).

An air conditioner (10) includes a refrigerant circuit (13) and refrigerant. The refrigerant circuit (13) has a compressor (1), a condenser (2), a pressure-regulating valve (3), and an evaporator (4). The refrigerant is R32. The pressure-regulating valve (3) includes a flow path (33) causing the refrigerant flowing from the condenser (2) to flow to the evaporator (4), a pressure reference chamber (S2) partitioned from the flow path (33) and filled with inert gas, and a valve portion (34) disposed in the flow path (33). The pressure-regulating valve (3) is configured to adjust a degree of opening of the valve portion (34) to adjust a flow rate of the refrigerant flowing through the flow path (33). The valve portion (34) is configured to increase the degree of opening when a pressure in the flow path (33) is higher than a pressure in the pressure reference chamber (S2), and reduce the degree of opening when the pressure in the flow path (33) is lower than the pressure in the pressure reference chamber (S2).

A thermostatic expansion valve includes an operating rod, a recessed receiver portion, and a first metering pin positioned at least partially within the receiver portion to selectively contact the operating rod. The first metering pin includes a base diameter, an overall length, and a taper portion. The taper portion is tapered at a specified degree relative to a longitudinal axis of the first metering pin. The thermostatic expansion valve is adapted to operate at a first specified refrigeration tonnage when the first metering pin is positioned at least partially within the receiver portion, and to operate at a second specified refrigeration tonnage when the first metering pin is replaced with a second metering pin including a different taper portion than the first metering pin.

An expansion valve is provided with a valve body including an inlet hole through which a refrigerant flows into a valve chamber, and a valve hole through which the refrigerant flows out of the valve chamber; a valve element configured to adjust an amount of the refrigerant flowing through the valve hole; a power element that is mounted to the valve body and configured to drive the valve element via a valve rod; a first vibration isolation spring provided in the valve chamber and configured to prevent vibration of the valve element; and a second vibration isolation spring that is in contact with the valve rod and configured to prevent vibration of the valve element.

The present disclosure provides an expansion valve device which is capable of being mounted easily. The expansion valve device includes: an expansion valve body that depressurizes refrigerant; and a casing in which the expansion valve body is housed. The casing includes a tube portion having an opening through which the expansion valve body is able to pass. The tube portion is formed integrally to surround over an entire perimeter of the expansion valve body. The tube portion has: an elastic holding portion formed of an elastic material and holding the expansion valve body by a reaction force due to elastic deformation by surrounding the entire perimeter of the expansion valve body; and a support portion formed of a material having a higher rigidity than the elastic holding portion and supporting the elastic holding portion. At least a part of the support portion is exposed to outside of the casing.