Abstract: An electronic expansion valve includes an electromagnetic coil, a valve body provided with a valve port, and a valve needle. The valve needle includes a main body section and a first conical surface portion arranged adjacent to the main body section. The valve port includes a straight section portion having equal diameters. When the electromagnetic coil applies a zero pulse, the straight section portion is not in contact with the valve needle, and an intersecting surface of a plane, where a top end of the straight section portion is located, and the valve needle is on the first conical surface portion. With the electronic expansion valve, flow can be precisely adjusted at a low-pulse stage, and during assembly, a position of the 0 pulse can be directly obtained by adjusting relative positions of the valve needle and the valve port and by using a flow meter.

Abstract: A direct-action-type electrically-operated valve comprises a valve base (30) provided with a valve cavity, a motor (10) disposed on the upper end the valve base, and a screw rod (312). The screw rod (312) is fitted and connected to a nut (41) by means of threads. The nut is connected to a spool (42). Axial positions of a rotor (12) of the motor and the valve base are relatively fixed. The upper end of the screw rod is fixedly connected to the rotor. Driven by the nut, the spool moves along the axial direction of the valve cavity to open or close a valve opening (30a) disposed on the valve base. The spool is a tubular structure provided with a balancing channel, and a seal piece for dividing the valve cavity into two independent cavities is disposed on the periphery of the spool.

Abstract: A thermal expansion valve with one-way control function includes a valve body having an inlet passage and an out passage, a temperature sensor installed on one end of the valve body, and a first valve core component installed in an inside chamber of the valve body. The first valve core component includes a first valve core and a valve rod against the temperature sensor. The valve body also includes an accommodation component extending from said the inlet passage into the valve body and coaxially installed with the inlet passage. The accommodation component has a second valve port connected with the inside chamber. The accommodation component has a second valve core component having a supporting piece and a second valve core matching the second valve port. The processing of the structure is convenient and the assembly of the second valve core component is simple and reliable.

Abstract: A thermal expansion valve comprises a valve body and a valve core member. The valve body is provided with a first connecting chamber, a lower cavity with a transmission member built in, and a first sealing member for separating the first connecting chamber and the lower cavity. A fifth pressure-bearing surface and a sixth pressure-bearing surface, pressed by a cold medium in the first connecting chamber in opposite directions, are disposed on a side wall of the valve core member. The first sealing member comprises a first flexible sealing element, disposed between the transmission member and an upper end portion of the valve core member and having a first edge portion connected to the valve body in a sealing manner.

Abstract: An electronic expansion valve is provided, a stop component thereof includes a spindle which is fixed with respect to the valve seat, a spring guide rail sleeved on the spindle, and a sliding ring configured to cooperate with the spring guide rail; one end of the sliding ring extends to form a stop rod, and a top of the magnet is provided with a stop hole, the stop rod passes through the stop hole, and when the sliding ring is at an upper limit position and a lower limit position, the stop rod remains in the stop hole. The structural design of the electronic expansion valve may reduce a number of components, simplify the assembly process of a stop rod, and improve the operational reliability of the stop rod, and reduce a radial dimension of a magnet, thereby saving the material cost and realizing the minimization of the product.

Abstract: An electronic expansion valve comprising a screw rod and a motor provided with an output shaft. The output shaft is transmissively connected to the screw rod via a gear system. The gear system is supported on a gear base. The screw rod passes through the gear base. The electronic expansion valve also comprises a valve base provided with valve cavity and a motor housing arranged on the exterior of the motor. The gear base is further arranged within the valve cavity. The upper end part of the valve base is further connected to the lower end part of the motor housing. The structural design of the electronic expansion valve reduces the number of sealed parts for same, thus effectively lowering the probability of leakage and simplifying the assembly structure thereof.

Abstract: A flow regulating valve includes a valve seat and a shell connected to the valve seat, a motor is provided in the shell, and the motor is connected to a screw rod. The screw rod is connected with a nut in a thread cooperation manner, the nut is connected with a valve rod, and the valve rod is movable in an axial direction to regulate an opening degree of a valve port on the valve seat. The whole of the nut or a lower portion of the nut is in clearance fit with the mounting groove in the valve rod in a radial direction. An internal wall of the mounting groove is provided with an annular position limiting groove, in which a position limiting component is provided. The design of the flow regulating valve is able to eliminate the coaxiality error between the screw rod and the screw nut.

Abstract: A bidirectional filter and a heat pump system. The bidirectional filter comprises a housing and at least two control value components. The two control value components divide the inner chamber of the housing into a filter chamber and two transitional chambers. The control value component comprises a frame body fixed on an inner wall of the housing, and an outlet blocking piece fitting an outlet of the frame body. The outlet blocking piece is on an outer side of the frame body. The bidirectional filter further comprises a protective member located in the filter chamber and fixed relative to the housing. The protective member is provided with a protective surface opposite to an outer side surface of the outlet blocking piece. When the pressure of a refrigerant in the pipeline is too high, the protective surface of the protective member can limit movement of the outlet blocking piece.

Abstract: A direct-action-type electrically-operated valve comprises a valve base provided with a valve cavity, a motor disposed on the upper end the valve base, and a screw rod. The screw rod is fitted and connected to a nut by means of threads. The nut is connected to a spool. Axial positions of a rotor of the motor and the valve base are relatively fixed. The upper end of the screw rod is fixedly connected to the rotor. Driven by the nut, the spool moves along the axial direction of the valve cavity to open or close a valve opening disposed on the valve base. The spool is a tubular structure provided with a balancing channel, and a seal piece for dividing the valve cavity into two independent cavities is disposed on the periphery of the spool.

Abstract: Disclosed in the present invention is an electronic expansion valve, which comprises a valve seat assembly (7) and a valve housing assembly (5) connected to the valve seat assembly (7). A valve stem assembly (6) and a valve port (121) are disposed in the chamber of the valve seat assembly (7), and an electrical motor (51) is situated in the chamber of the valve housing assembly (5). The electrical motor (51) drives the valve stem assembly (6) to move along an axial direction through a gear system (52) so as to adjust the flow rate of the fluid flowing through the valve port (121). The valve seat assembly (7) has a split structure, which comprises a valve seat (1) and a cover (9) connected to the valve seat (1) and to the valve housing assembly (5). A mounting surface (13) is formed on the outer side of the valve seat (1) and a sight glass (8) is connected thereon. The structure of the expansion valve enables the sight glass (8) to be easily attached to the valve seat assembly (7).

Abstract: An electronic expansion valve is provided, a sleeve is fixed in a main valve cavity of the electronic expansion valve, and a valve core seat is axially movably provided in the sleeve; a circumferential side wall of the sleeve is provided with a sleeve flow passage, and a circumferential side wall of the valve core seat is provided with a valve core seat side hole; and when the refrigerant flows forward, the valve core seat closes the main valve port to disconnect a communication between the sleeve flow passage and the valve core seat side hole, and the refrigerant flows to the valve core valve port through the sleeve flow passage; and when the refrigerant flows reversely, the valve core seat moves upward to open the main valve port to communicate the valve core seat side hole with the sleeve flow passage.

Abstract: An electronic expansion valve is provided, which includes a main valve cavity. A sleeve is fixed in the main valve cavity. A lower end part of the sleeve is supported by a valve seat, and the lower end part of the sleeve surrounds a main valve port. A valve core seat is axially movably arranged in the sleeve. A lower part of the valve needle component extends into the sleeve to open and close the valve core valve port. A circumferential side wall of the sleeve is provided with a first communicating hole close to the main valve port and a second communicating hole away from the main valve port. The structural design of the electronic expansion valve may prevent an excessive impact on a valve core seat caused by the refrigerant with high pressure when the refrigerant flows forward, thereby preventing the eccentricity of the valve core seat.

Abstract: An electronic expansion valve includes a drive component including a screw rod which reciprocates axially and a nut which cooperates with the screw rod by screw threads, and a lower end of the screw rod forms the valve needle component. A sleeve is fixed in the main valve cavity, an upper portion of the sleeve cooperates with the nut, and a lower end of the sleeve is supported by the valve seat and surrounds the main valve port. The valve core seat is axially movably arranged in the sleeve, and the lower end of the screw rod extends into the sleeve to open and close the valve core valve port. The structural design of the electronic expansion valve prevents an excessive impact on a valve core seat caused by the refrigerant with high pressure when the refrigerant flows forward, thereby preventing the eccentricity of the valve core seat.

Abstract: A flow control valve comprises a valve seat (1) having a valve port (121) in its valve chamber and a valve rod (2) opening or closing the valve port (121). A sleeve protrusion part (122) projects upward from the valve port (121) in an axial direction thereof. The valve rod (2) is tubular and is cylindrical at the lower end. An open slot (3) matching with a flow curve is provided in the circumferential side wall of one of the sleeve protrusion part (122) and the lower end of the valve rod (2). One of the sleeve protrusion part (122) and the lower end of valve rod (2) is inserted into or extracted from the other to disconnect or connect the open slot (3) with the valve port (121). The structural design of the flow control valve can balance the refrigerant pressure on the valve rod (2) in the axial direction while ensuring that the required flow curve can be obtained.

Abstract: An electronic expansion valve and a connector assembly thereof are provided. The connector assembly includes a connector seat hermetically connected to a housing of the electronic expansion valve, and contact pins configured to connect an external control component. The housing has a valve cavity in which an electrical motor is arranged, the connector seat has a sealing cavity in communication with the valve cavity, an insulation sleeve is provided inside the sealing cavity and provided with mounting positions corresponding to terminals of the electrical motor, and the mounting positions are electrically insulated from each other and spaced from each other, the insulation sleeve is further provided with connecting holes, and each contact pin has one end passing through the respective connecting hole to be connected to the respective terminal, and another end extending out of the sealing cavity to form a connecting end to connect the external control component.

Abstract: An electronic expansion valve is provided, a valve rod of which is provided with an axial through-hole in communication with a valve port, and a lateral wall of the axial through-hole of the valve seat is sealed with respect to the valve rod. An end surface of the valve rod includes a sealing surface in sealing contact with an end surface at the valve port, the sealing surface includes a first sealing surface to bear an action force of refrigerant at one connecting port and a second sealing surface to bear an action force of refrigerant at another connecting port, and the effective pressure-bearing area of the first sealing surface is equal to that of the second sealing surface. Further provided is an electronic expansion valve in line contact seal with the valve seat.

Abstract: An expansion valve is disclosed herein and includes a valve body having a chamber; a valve seat and a valve core are provided in the chamber; a first opening and a second opening in communication with the chamber, wherein the valve core moves relative to the valve seat to control a size of a flow channel between the first opening and the second opening, wherein the valve core includes a valve core head portion facing the valve seat, the valve head portion is provided with an axial through hole, a piston is provided in the axial through hole, the piston is connected with the valve body. The piston which is connected with the valve body is provided in the axial through hole of the valve core head portion of the expansion valve.

Abstract: An electronic expansion valve is provided, a stop component thereof includes a spindle which is fixed with respect to the valve seat, a spring guide rail sleeved on the spindle, and a sliding ring configured to cooperate with the spring guide rail; one end of the sliding ring extends to form a stop rod, and a top of the magnet is provided with a stop hole, the stop rod passes through the stop hole, and when the sliding ring is at an upper limit position and a lower limit position, the stop rod remains in the stop hole. The structural design of the electronic expansion valve may reduce a number of components, simplify the assembly process of a stop rod, and improve the operational reliability of the stop rod, and reduce a radial dimension of a magnet, thereby saving the material cost and realizing the minimization of the product.

Abstract: An electronic expansion valve includes a drive component including a screw rod which reciprocates axially and a nut which cooperates with the screw rod by screw threads, and a lower end of the screw rod forms the valve needle component. A sleeve is fixed in the main valve cavity, an upper portion of the sleeve cooperates with the nut, and a lower end of the sleeve is supported by the valve seat and surrounds the main valve port. The valve core seat is axially movably arranged in the sleeve, and the lower end of the screw rod extends into the sleeve to open and close the valve core valve port. The structural design of the electronic expansion valve prevents an excessive impact on a valve core seat caused by the refrigerant with high pressure when the refrigerant flows forward, thereby preventing the eccentricity of the valve core seat.

Abstract: An electronic expansion valve is provided, a sleeve is fixed in a main valve cavity of the electronic expansion valve, and a valve core seat is axially movably provided in the sleeve; a circumferential side wall of the sleeve is provided with a sleeve flow passage, and a circumferential side wall of the valve core seat is provided with a valve core seat side hole; and when the refrigerant flows forward, the valve core seat closes the main valve port to disconnect a communication between the sleeve flow passage and the valve core seat side hole, and the refrigerant flows to the valve core valve port through the sleeve flow passage; and when the refrigerant flows reversely, the valve core seat moves upward to open the main valve port to communicate the valve core seat side hole with the sleeve flow passage