Valve and combined four-way valve

Abstract

The utility model provides a valve and a combined four-way valve. The valve comprises a valve seat assembly and a valve element assembly. The valve seat assembly is provided with a first valve port, a first valve hole and a pressure valve port. A cavity is formed in the valve seat assembly; the valve element assembly comprises a first piston. The first piston is movably arranged in the cavity and is in sealing fit with the inner wall of the cavity through a first sealing ring, and the first sealing ring divides the cavity into a first cavity body and a second cavity body which are located on the two sides of the first sealing ring respectively. The pressure valve port is always communicated with the first cavity, and the first valve hole is always communicated with the second cavity; the acting force, acting on the first piston, of fluid in the first cavity is F1, the acting force, acting on the first piston, of fluid in the second cavity is F2, one of F1 and F2 drives the valve element assembly to close the first valve port, and the other one of F1 and F2 drives the valve element assembly to open the first valve port. When the valve element assembly opens the first valve port, the first valve port is communicated with the first valve hole.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of valves, in particular to a valve and a combined four-way valve. BACKGROUND

[0002] A check valve is a widely used valve type, which controls the structure of the valve core and the valve cavity or valve port, so that the valve core can only open the valve port when the fluid flows in the forward direction, and keep the valve port closed when the fluid flows in the reverse direction. However, the existing check valve can only realize one-way flow function. For complex fluid flow scenarios, such as switching between one-way flow and two-way flow, the check valve cannot meet the demand for two-way flow, and cannot actively switch the flow mode, which seriously restricts the application range of the check valve. CONTENT OF THE UTILITY MODEL

[0003] One of the main purposes of the present disclosure is to overcome at least one of the defects of the prior art, and to provide a valve.

[0004] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, a valve is provided, which comprises a valve seat assembly and a valve core assembly; the valve seat assembly is provided with a first valve port, a first valve hole and a pressure valve port; the valve seat assembly is internally provided with a cavity; the valve core assembly comprises a first piston; the first piston is movably arranged in the cavity and is in sealing cooperation with the inner wall of the cavity through a first sealing ring, and the first sealing ring separates the cavity into a first cavity and a second cavity located on the two sides thereof respectively; the pressure valve port is always in communication with the first cavity, and the first valve hole is always in communication with the second cavity; wherein the fluid in the first cavity acts on the first piston with a force F1, and the fluid in the second cavity acts on the first piston with a force F2, one of F1 and F2 drives the valve core assembly to close the first valve port, and the other one of F1 and F2 drives the valve core assembly to open the first valve port; in the state that the valve core assembly opens the first valve port, the first valve port is in communication with the first valve hole.

[0006] According to one of the embodiments of the present disclosure, the valve core assembly further comprises a valve stem and a second piston; the first piston and the second piston are respectively arranged at the two ends of the valve stem, and the second piston closes or opens the first valve port.

[0007] According to one of the embodiments of the present disclosure, the inner wall of the second cavity is provided with a protruding section facing the valve rod, and the valve rod penetrates through the protruding section; the second cavity comprises a valve cavity and a piston cavity which are located on both sides of the protruding section and are connected; the first piston is located between the first cavity and the piston cavity, the second piston is located in the valve cavity, the first valve port is arranged in the piston cavity, and the first valve hole is connected to the valve cavity.

[0008] According to one of the embodiments of the present disclosure, the protruding section is further provided with a communication channel which connects the valve cavity and the piston cavity.

[0009] According to one of the embodiments of the present disclosure, the valve seat assembly comprises a first seat body and a second seat body connected above the first seat body; the second cavity is arranged in the first seat body, and the second cavity forms the first valve port at the bottom of the first seat body; the pressure valve port is arranged in the first seat body and / or the second seat body; and a part of the gap between the first seat body and the second seat body is arranged to form the first cavity.

[0010] According to one of the embodiments of the present disclosure, the second seat body has a limiting surface, and the first piston abuts against the limiting surface when moving to the farthest distance relative to the first valve port.

[0011] According to one of the embodiments of the present disclosure, the valve core assembly further comprises a valve rod, a second piston and an elastic member; the first piston and the second piston are arranged at two ends of the valve rod respectively, and the second piston closes or opens the first valve port; one end of the elastic member is connected to the inner wall of the second cavity, and the other end is connected to the valve rod or the first piston, and the elastic member is used to apply a force to the first piston in the direction of closing the first valve port.

[0012] According to one of the embodiments of the present disclosure, the bottom surface of the first piston is provided with a first groove, and the groove wall of the first groove is spaced around the valve rod, so that the first groove and the valve rod jointly form a ring-shaped accommodating groove; the elastic member is a spring, and the spring is arranged around the valve rod, and a part of the spring is located in the ring-shaped accommodating groove.

[0013] According to one of the embodiments of the present disclosure, the valve rod has an assembly part and a limiting part which are connected in the axial direction or are integrally arranged; the assembly part is a part of the valve rod which sleeves the first piston, and the limiting part is connected to the top of the assembly part and is located in the first cavity; the first piston is provided with a piston hole for the assembly part to pass through; and the width of the limiting part is greater than the hole diameter of the piston hole.

[0014] According to one of the embodiments of the present disclosure, the valve core assembly is located in the cavity of the valve seat assembly, and the first valve port is located in the second cavity; the second valve port is also arranged in the second cavity, and the first valve port is located between the first valve port and the second valve port; the valve core assembly further comprises a second piston connected with the first piston; the second piston closes or opens the first valve port.

[0015] According to one of the embodiments of the present disclosure, the valve seat assembly is provided with a second groove, at least part of the second piston extends into the second groove and moves axially along the circumferential wall of the second groove, and one end of the second piston opposite to the bottom wall of the second groove is limitedly matched with the bottom wall of the second groove.

[0016] According to one of the embodiments of the present disclosure, an elastic member is arranged between the one end of the second piston opposite to the first piston and the inner wall of the valve seat assembly, and the elastic force of the elastic member is directed to the first valve port.

[0017] Another main purpose of the present disclosure is to overcome at least one of the defects of the prior art, and to provide a combined four-way valve using the above valve.

[0018] To achieve the above purpose, the present disclosure adopts the following technical solutions:

[0019] According to another aspect of the present disclosure, a combined four-way valve is provided, which comprises the valve, the electric valve and the valve body provided in the present disclosure and described in the above embodiments; the electric valve comprises a valve seat and a valve core, the valve seat is provided with a second valve port and a third valve port; the valve core is sealingly matched with the second valve port or the third valve port; the valve body is internally provided with a first assembly cavity for mounting the electric valve and a second assembly cavity for mounting the valve; the valve body is provided with a first opening, a second opening, a third opening and a fourth opening which are communicated with the outside, the first opening and the second opening are respectively communicated with the first assembly cavity, and the third opening and the fourth opening are respectively communicated with the second assembly cavity; the valve body is internally provided with a first communication channel and a second communication channel; the second opening is always communicated with the first cavity through the second communication channel, and the third opening is always communicated with the first communication channel; when the valve core closes the second valve port, the fluid in the first opening drives the first valve port to close, and the first opening is communicated with the third opening through the third valve port and the first communication channel; when the valve core closes the third valve port, the fluid in the first opening drives the first valve port to open, the first opening is communicated with the second opening, and the fourth opening is communicated with the third opening through the first valve port.

[0020] According to one of the embodiments of the present disclosure, the first assembly cavity and the second assembly cavity are arranged along a first direction; wherein a surface of the valve body is provided with a first heat insulation groove, and the first heat insulation groove is at least partially located between the first assembly cavity and the second assembly cavity.

[0021] According to one of the embodiments of the present disclosure, the first heat insulation groove is recessed on a surface of the valve body which is perpendicular to a second direction, and penetrates the valve body along a third direction, wherein the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction.

[0022] According to one of the embodiments of the present disclosure, the part of the valve body provided with the first heat insulation groove is a connecting portion, and the connecting portion is provided with a second heat insulation groove and / or a heat insulation hole, wherein the second heat insulation groove or the heat insulation hole penetrates the connecting portion along the second direction.

[0023] According to one of the embodiments of the present disclosure, two side surfaces of the valve body which are perpendicular to the second direction are respectively provided with the first heat insulation groove, and the positions of the two first heat insulation grooves are oppositely arranged.

[0024] According to the above technical solution, the valve and the combined four-way valve provided by the present disclosure have the following advantages and positive effects:

[0025] The valve provided by the present disclosure comprises a valve seat assembly and a valve core assembly; the valve seat assembly is provided with a first valve port, a first valve hole and a pressure valve port; the valve seat assembly is internally provided with a cavity; the valve core assembly comprises a first piston; the first piston is movably arranged in the cavity and is in sealing cooperation with the inner wall of the cavity through a first sealing ring, and the first sealing ring separates the cavity into a first cavity and a second cavity which are located on the two sides of the first cavity respectively; the pressure valve port is always in communication with the first cavity, and the first valve hole is always in communication with the second cavity; wherein the force of the fluid in the first cavity acting on the first piston is F1, the force of the fluid in the second cavity acting on the first piston is F2, one of F1 and F2 drives the valve core assembly to close the first valve port, and the other one of F1 and F2 drives the valve core assembly to open the first valve port; in the state that the valve core assembly opens the first valve port, the first valve port is in communication with the first valve hole. Through the above design, when the pressure medium is input through the pressure valve port, the valve core assembly is controlled to be opened, so as to realize the controllable communication between the valve port and the first valve hole, that is, the valve at this time is a pressure control valve. Furthermore, when the pressure medium is not input through the pressure valve port, the second piston can be opened when the medium flows from the first valve hole to the valve port, and can be closed when the medium flows reversely, so as to realize the automatic one-way flow between the valve port and the first valve hole, that is, the valve at this time is a one-way valve. BRIEF DESCRIPTION OF DRAWINGS

[0026] The various objects, features and advantages of the present disclosure will become more apparent to those skilled in the art from the following detailed description, taken in conjunction with the accompanying drawings. The drawings are merely schematic and are not drawn to scale. In the drawings, like reference numerals refer to like parts throughout the various views. Wherever possible, the same reference numbers are used in the drawings and the following detailed description.

[0027] Figure 1 is a structural schematic view of a valve from one perspective according to an exemplary embodiment;

[0028] Figure 2 is Figure 1 a structural schematic view of the valve from another perspective;

[0029] Figure 3 is Figure 1 an axial sectional view of the valve in one working state;

[0030] Figure 4 is Figure 1 an axial sectional view of the valve in another working state;

[0031] Figure 5 is Figure 3 an enlarged schematic view of portion A in

[0032] Figure 6 is an axial sectional view of a valve according to another exemplary embodiment;

[0033] Figure 7 is a structural schematic view of a combined four-way valve from one perspective according to an exemplary embodiment;

[0034] Figure 8 is Figure 7 a structural schematic view of the combined four-way valve from another perspective;

[0035] Figure 9 is Figure 7 a top view of the combined four-way valve;

[0036] Figure 10 is a sectional view taken along straight line B-B in Figure 9

[0037] Figure 11 is Figure 10 an enlarged schematic view of the sectional structure in one working state;

[0038] Figure 12 is Figure 10 an enlarged schematic view of the sectional structure in another working state;

[0039] Figure 13 is Figure 7 ​Structure schematic diagram of the combined four-way valve in another perspective view.

[0040] The reference signs are explained as follows:

[0041] 100. Valve; 124. Elastic member;

[0042] 1001. First valve port; 125. Second sealing ring;

[0043] 1002. First valve hole; 126. First sealing ring;

[0044] 1003. Pressure valve port; 127. Spring cavity;

[0045] 1004. Second valve hole; 1271. Side hole;

[0046] 110. Valve seat assembly; 200. Valve body;

[0047] 1101. First cavity; 2001. First opening;

[0048] 1102. Second cavity; 2002. Second opening;

[0049] 11021. Protruding section; 2003. Third opening;

[0050] 1103. Piston cavity; 2004. Fourth opening;

[0051] 1104. Valve cavity; 2005. First communication channel;

[0052] 1105. Communication channel; 2006. Second communication channel;

[0053] 1106. Second groove; 210. First heat insulation groove;

[0054] 111. First seat body; 220. Connecting part;

[0055] 112. Second seat body; 221. Heat insulation hole;

[0056] 1121. Limiting surface; 300. Electric valve;

[0057] 121. Valve rod; 3001. Second valve port;

[0058] 1211. Assembly part; 3002. Third valve port;

[0059] 1212. Limiting part; 3003. Third valve hole;

[0060] 122. Second piston; 3004. Fourth valve hole;

[0061] 123. first piston; 310. valve seat;

[0062] 1231. first groove; 320. valve core;

[0063] 1232. piston hole; 330. driving mechanism. DETAILED DESCRIPTION

[0064] Embodiments embodying the features and advantages of the present disclosure will be described in detail hereinafter. It should be understood that the present disclosure can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the disclosure to those skilled in the art.

[0065] In the following description of various example embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the present disclosure can be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps can be utilized and that structural and functional modifications can be made without departing from the scope of the present disclosure. Also, while the terms "over," "between," "inside," "on," "under," and the like, can be used in this specification to describe relative location, such terms are used herein as examples of directional or positional relationships. Any language of relative position, such as "on," "above," "between," "inside," "under," and the like, is used herein for convenience and internal reference only and does not limit the position of the claimed subject matter.

[0066] Referring to Figure 1 , a structural schematic view of the valve 100 according to the present disclosure is shown in one perspective view. In this example embodiment, the valve 100 according to the present disclosure is described by way of example as a valve device applied to an air conditioning system. It is readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes can be made to the following detailed description of the embodiments in order to apply the relevant design of the present disclosure to valve devices in other application scenarios, and such changes are still within the scope of the principle of the valve 100 according to the present disclosure.

[0067] As shown in Figure 1 , in one embodiment of the present disclosure, the valve 100 according to the present disclosure includes a valve seat assembly 110 and a valve core assembly. For reference, see Figures 2 to 5 , Figure 2 , a structural schematic view of the valve 100 is shown in another perspective view; Figure 3 and Figure 4 , axial side sectional views of the valve 100 are shown in two different working states; Figure 5 , a structural schematic view of the valve 100 is shown in another perspective view; Figure 3An enlarged schematic diagram of part A in the figure. The structure, connection method, and functional relationship of the main components of the valve 100 proposed in this disclosure will be described in detail below with reference to the above-mentioned figures.

[0068] like Figures 1 to 4 As shown, in one embodiment of this disclosure, the valve seat assembly 110 is provided with a first valve port 1001, a first valve hole 1002, and a pressure valve port 1003, and a cavity is provided inside the valve seat assembly 110. The valve core assembly includes a first piston 123. The first piston 123 is movably disposed in the cavity of the valve seat assembly 110, and the first piston 123 is sealed to the inner wall of the cavity by a first sealing ring 126. The first sealing ring 126 is disposed around the periphery of the first piston 123, and the first sealing ring 126 isolates the cavity into a first cavity 1101 and a second cavity 1102 located on both sides thereon. In other words, the first piston 123 is located between the first cavity 1101 and the second cavity 1102. The pressure valve port 1003 is always in communication with the first cavity 1101, and the first valve hole 1002 is always in communication with the second cavity 1102. Based on this, the fluid in the first cavity 1101 exerts a force F1 on the first piston 123, and the fluid in the second cavity 1102 exerts a force F2 on the first piston 123. One of F1 and F2 drives the valve core assembly to close the first valve port 1001, and the other of F1 and F2 drives the valve core assembly to open the first valve port 1001. With the valve core assembly opening the first valve port 1001, the first valve port 1001 is connected to the first valve orifice 1002. Through the above design, this disclosure controls the valve core assembly to open when a pressure medium is input via the pressure valve port 1003, thereby achieving controllable communication between the first valve port 1001 and the first valve orifice 1002. That is, the valve 100 at this time is a pressure-controlled valve. Furthermore, when no pressure medium is input into the pressure valve port 1003, this disclosure enables the second piston 122 to open when the medium flows from the first valve hole 1002 to the first valve port 1001 and to close when the medium flows in the reverse direction, so as to realize automatic one-way flow between the first valve port 1001 and the first valve hole 1002, that is, the valve 100 at this time is a one-way valve.

[0069] Specifically, the first piston 123 of the valve 100 does not have a conduction function, i.e. the pressure valve port 1003 and the first valve hole 1002 (or the first valve port 1001) are always in a closed state. In other words, the pressure valve port 1003 and the first valve hole 1002 are always not connected, and the valve 100 can only realize the connection between the first valve hole 1002 and the first valve port 1001, so the overall structure of the valve 100 is equivalent to a combination structure of a one-way valve and a piston (the first piston 123). Wherein, when the pressure valve port 1003 has no pressure, the overall structure of the valve 100 is equivalent to a one-way valve. When the first valve hole 1002 has a large pressure and the first valve port 1001 is opened, the medium can flow from the first valve hole 1002 to the first valve port 1001. When the first valve port 1001 has a large pressure and the first valve port 1001 is closed, the first valve hole 1002 and the first valve port 1001 are disconnected. When the pressure valve port 1003 has the maximum pressure, the first valve port 1001 is always opened. When the pressure valve port 1003 has no pressure, the medium flows from the first valve hole 1002 into the valve cavity and flows out from the first valve port 1001. When the pressure valve port 1003 has pressure, the medium can flow from the first valve hole 1002 into the valve cavity and flow out from the first valve port 1001, or flow from the first valve port 1001 into the valve cavity and flow out from the first valve hole 1002. Therefore, the first valve port 1002 of the valve 100 can be used as an inlet or an outlet, and the pressure valve port 1003 is only used as a pressure port. Wherein, the second piston 122 is subjected to the opposite fluid force of the medium from the first valve port 1001 and the first valve port 1002, and the first piston 123 is subjected to the opposite fluid force of the medium from the pressure valve port 1003 and the first valve port 1002.

[0070] For example, when high pressure is connected to the first valve port 1001 and low pressure is connected to the pressure valve port 1003, the second piston 122 will close the first valve port 1001 under the pressure of the high-pressure side, thus disconnecting the passage between the first valve port 1001 and the first valve port 1002. Furthermore, when low pressure is connected to the first valve port 1001 and high pressure is connected to the pressure valve port 1003, the first piston 123 will drive the valve stem 121 downwards under the pressure of the high-pressure side, causing the second piston 122 to open the first valve port 1001, thus opening the passage between the first valve port 1001 and the first valve port 1002. Once the passage between the first valve port 1001 and the first valve port 1002 is open, the opening of the first valve port 1002 can be maintained by controlling the magnitude of the control pressure input from the pressure valve port 1003, thereby maintaining the conduction state between the first valve ports 1002 and the first valve port 1002. The specific calculation of the control pressure can satisfy the following relationship for example: (Pc-Pa)×S>ΔP, where Pc is the control pressure on the side of the pressure valve port 1003, Pa is the pressure on the side of the first valve port 1002, S is the cross-sectional area of ​​the first piston 123, and ΔP is the pressure drop of the medium flowing from the first valve port 1001 through the valve cavity to the first valve port 1002. Accordingly, by keeping (Pc-Pa)×S greater than the pressure drop from the first valve port 1001 to the first valve port 1002, the second piston 122 can be kept open to keep the first valve port 1001 open.

[0071] like Figure 3 and Figure 4 As shown, in one embodiment of this disclosure, the valve core assembly may further include a valve stem 121 and a second piston 122. The first piston 123 and the second piston 122 are respectively disposed at both ends of the valve stem 121, and the second piston 122 closes or opens the first valve port 1001.

[0072] like Figure 3 As shown, based on the design of the valve core assembly including a valve stem 121 and a second piston 122, in one embodiment of this disclosure, the inner wall of the second cavity 1102 is provided with a protruding section 11021 facing the valve stem 121, and the valve stem 121 passes through the protruding section 11021. The second cavity 1102 includes a valve cavity 1104 and a piston cavity 1103 located on both sides of the protruding section 11021 and connected to each other. The first piston 123 is located between the first cavity 1101 and the piston cavity 1103, the second piston 122 is located in the valve cavity 1104, the first valve port 1001 is disposed in the piston cavity 1103, and the first valve port 1002 communicates with the valve cavity 1104.

[0073] like Figure 3 and Figure 4As shown, in an embodiment of the present disclosure, the protruding section 11021 can also be provided with a communication passage 1105, which communicates the valve cavity 1104 and the piston cavity 1103. Through the above design, as the first piston 123 keeps the piston cavity 1103 from the communication passage 1105, when the first piston 123 moves downward with the valve stem 121 (i.e. moves towards the valve cavity 1104), the space of the piston cavity 1103 is compressed, and the medium can flow from the piston cavity 1103 to the valve cavity 1104 through the communication passage 1105, similarly, when the first piston 123 moves upward with the valve stem 121 (i.e. moves away from the valve cavity 1104), the space of the piston cavity 1103 is expanded, and the medium can flow from the valve cavity 1104 to the piston cavity 1103 through the communication passage 1105, thereby ensuring the normal movement of the first piston 123 with the valve stem 121.

[0074] As Figures 1 to 4 As shown, in an embodiment of the present disclosure, the valve seat assembly 110 can include a first seat body and a second seat body 112 connected above the first seat body 111. On this basis, the second cavity 1102 is arranged in the first seat body 111, and the first valve port 1001 is formed at the bottom of the first seat body 111. The first cavity 1101 is formed by arranging a gap between the first seat body 111 and the second seat body 112. Through the above design, the valve core assembly can be conveniently assembled, for example, the size of the structure (such as the limiting portion 1212 described below) on the upper end of the valve stem 121 is larger than the space of the through hole for the valve stem 121 to pass between the piston cavity 1103 and the valve cavity 1104, the valve core assembly can be first assembled from the top opening side of the piston cavity 1103, and then the first seat body 111 and the second seat body 112 are assembled. In some other embodiments of the present disclosure, the pressure valve port 1003 can also be arranged in the first seat body 111, and the pressure valve port 1003 can also be formed by the first seat body 111 and the second seat body 112, which is not limited to the present embodiment.

[0075] As Figure 3 and Figure 4 As shown, based on the design that the valve seat assembly 110 includes the first seat body 111 and the second seat body 112, in an embodiment of the present disclosure, the second seat body 112 can have a limiting surface 1121, and the first piston 123 abuts against the limiting surface 1121 when moving to the farthest distance from the first valve port 1001. Among them, in the state that the upper end of the valve stem 121 abuts against the limiting surface 1121, the second piston 122 closes the first valve port 1001, at this time, the first valve port 1001 and the second valve port 1002 are disconnected, and the first piston 123 is located in the piston cavity 1103, at this time, the first piston 123 still keeps the barrier between the piston cavity 1103 and the pressure flow passage.

[0076] AsFigure 3 and Figure 4 As shown, in one embodiment of this disclosure, the valve core assembly may further include an elastic element 124. One end of the elastic element 124 is connected to the inner wall of the second cavity 1102, and the other end of the elastic element 124 is connected to the valve stem 121 or the first piston 123. The elastic element 124 can apply a force to the first piston 123 in the direction of closing the first valve port 1001. With the above design, when the pressure medium flows to the area above the first piston 123, under the pressure of the pressure medium, the first piston 123 drives the valve stem 121 to move downward together. The elastic element 124 is compressed in this process. When the pressure medium is stopped or reduced, the valve stem 121 will drive the first piston 123 to move upward together to reset under the action of the elastic element 124, and keep the second piston 122 in the state of closing the first valve port 1001. In other embodiments of this disclosure, the elastic element 124 may also be connected to the inner wall of the first piston 123 and the piston cavity 1103, and is not limited to this embodiment.

[0077] like Figure 5 As shown, based on the design of the valve core assembly including the elastic element 124, in one embodiment of this disclosure, the bottom surface of the first piston 123 may be provided with a first groove 1231. The groove walls of the first groove 1231 surround the valve stem 121 at intervals, so that the first groove 1231 and the valve stem 121 together form an annular receiving groove. Furthermore, the elastic element 124 may be a spring, which is arranged around the valve stem 121, and the spring portion is located within the annular receiving groove. Through the above design, this disclosure utilizes the annular receiving groove to avoid and accommodate part of the spring, thereby extending the axial arrangement length of the spring without increasing the overall axial dimension of the product, enabling the spring to provide more reliable elastic preload and elastic reset functions.

[0078] like Figure 5As shown, in an embodiment of the present disclosure, the valve stem 121 can have a fitting portion 1211 and a limiting portion 1212 connected or integrally arranged along the axial direction, the fitting portion 1211 being the portion of the valve stem 121 sleeved with the first piston 123, and the limiting portion 1212 being connected to the top of the fitting portion 1211 and located in the first cavity 1101. The first piston 123 is provided with a piston hole 1232 through which the fitting portion 1211 passes. The width of the limiting portion 1212 can be greater than the hole diameter of the piston hole 1232. Through the above design, the present disclosure can limit the first piston 123 by the limiting portion 1212 and the first piston 123, avoiding the first piston 123 from being pulled out of the top end of the valve stem 121. In some other embodiments of the present disclosure, the elastic member 124 can abut against the bottom of the first piston 123, for example, the bottom of the first recess 1231 of the first piston 123. Accordingly, the first piston 123 is limited in the up-down direction by the limiting portion 1212 and the elastic member 124 respectively, and accordingly, the assembly stability and reliability of the valve stem 121 and the first piston 123 can be further improved, and the sealing effect of the first piston 123 can be improved.

[0079] As shown in Figure 3 and Figure 4 As shown, in an embodiment of the present disclosure, the periphery of the second piston 122 can be sleeved with a second sealing ring 125. Through the above design, the present disclosure can improve the sealing effect of the second piston 122 when closing the first valve port 1001.

[0080] As shown in Figure 6 , Figure 6 As shown in

[0081] As shown in Figure 6As shown, in one embodiment of this disclosure, the pressure valve port 1003 may be located at the bottom of the valve seat assembly 110, and the first cavity 1101 communicating with the pressure valve port 1003 is located below the first piston 123, that is, the second cavity 1102 is located above the first piston 123, that is, the first cavity 1101 is located below the second cavity 1102. Furthermore, the first piston 123 is disposed at the lower end of the valve stem 121, and the second piston 122 is disposed at the upper end of the valve stem 121. Based on this, the first valve port 1001 is disposed on the inner wall of the second cavity 1102, and the side of the second cavity 1102 above the first valve port 1001 has an opening communicating with it. Accordingly, when the second piston 122 opens the first valve port 1001, connecting the first valve port 1001 to high pressure and the pressure valve port 1003 to low pressure, the pressure pushes the second piston 123 (valve core assembly) downward, causing the second piston 122 to close the first valve port 1001, thus disconnecting the first valve port 1001 from the first valve port 1002. When the first valve port 1001 is connected to low pressure and the pressure valve port 1003 is connected to high pressure, the pressure pushes the second piston 123 (valve core assembly) upward, opening the first valve port 1001, thus connecting the first valve port 1001 to the first valve port 1002. After the first valve port 1001 and the first valve port 1002 are connected, (Pc-Pa)×S is maintained to be greater than the pressure drop from the first valve port 1001 to the first valve port 1002, so that the second piston 122 remains open and the first valve port 1001 remains open. Furthermore, compared to... Figures 1 to 5 The illustrated embodiment employs a design where the valve core assembly is partially located within the cavity of the valve seat assembly 110 (e.g., the second piston 122 is at least partially located outside the cavity when the first valve port 1001 is opened). Figure 6 The illustrated embodiment employs a design where the entire valve core assembly is located within the cavity of the valve seat assembly 110.

[0082] like Figure 6 As shown, in one embodiment of this disclosure, the valve core assembly is located within the cavity of the valve seat assembly 110, and the first valve port 1001 is located within the second cavity 1102. A second valve hole 1004 is also provided within the second cavity 1102, and the first valve port 1001 is located between the first valve hole 1002 and the second valve hole 1004. The valve core assembly also includes a second piston 122 connected to the first piston 123. The second piston 122 closes or opens the first valve port 1001.

[0083] like Figure 6 As shown, in one embodiment of this disclosure, the valve seat assembly 110 may be provided with a second groove 1106, at least a portion of the second piston 122 extends into the second groove 1106, the second piston 122 is axially movable along the peripheral wall of the second groove 1106, and one end of the second piston 122 facing the bottom wall of the second groove 1106 is limited and engaged with the bottom wall of the second groove 1106.

[0084] As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122. Figure 6 As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122.

[0085] As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122. Figure 6 As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122. Figure 6 As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122. Figures 1 to 5 As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122.

[0086] As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122. Figure 6 As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122.

[0087] It should be noted that the valves shown in the drawings and described in the specification are only a few examples of the many valves that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the valves shown in the drawings or described in the specification.

[0088] Based on the above detailed description of the several exemplary embodiments of the valve proposed by the present disclosure, the following will describe several exemplary embodiments of the combined four-way valve proposed by the present disclosure.

[0089] Referring to Figure 7 , which representatively shows the structural schematic diagram of the combined four-way valve proposed by the present disclosure from one perspective. In this exemplary embodiment, the combined four-way valve proposed by the present disclosure is described by taking the valve device applied to the air conditioning system as an example. It is easy for those skilled in the art to understand that various modifications, additions, substitutions, deletions or other changes can be made to the following specific embodiments in order to apply the relevant designs of the present disclosure to valve devices in other application scenarios, and these changes are still within the scope of the principles of the pressure combined four-way valve proposed by the present disclosure.

[0090] As shown in the embodiment of the present disclosure, a spring 124 is arranged between the end of the second piston 122 facing away from the first piston 123 and the inner wall of the valve seat assembly 100, and the spring 124 points to the first valve port 1001 with the elastic force of the second piston 122. Figure 7As shown, in one embodiment of this disclosure, the combined four-way valve proposed in this disclosure includes a valve body 200, an electric valve 300, and a valve 100 proposed in this disclosure and described in detail in the above embodiments. See also... Figures 8 to 13 , Figure 8 The diagram above represents a structural schematic of a combined four-way valve from another perspective. Figure 9 The image shows a top view of a combined four-way valve. Figure 10 The middle section represents the direction along Figure 9 A sectional view made by line BB in the middle; Figure 11 China representatively shows Figure 10 An enlarged schematic diagram of the cross-sectional structure in a working state is shown; Figure 12 China representatively shows Figure 10 An enlarged schematic diagram of the cross-sectional structure in another working state is shown; Figure 13 The diagram above represents a structural schematic of the combined four-way valve from another perspective. The following will, in conjunction with the aforementioned figures, provide a detailed description of the structure, connection method, and functional relationship of the main components of the combined four-way valve proposed in this disclosure.

[0091] like Figures 7 to 12As shown, in an embodiment of the present disclosure, the electric valve 300 comprises a valve seat 310 provided with a second valve port 3001 and a third valve port 3002, and a valve core 320 sealingly matched with the second valve port 3001 or the third valve port 3002. The valve body 200 is internally provided with a first assembly cavity for mounting the electric valve 300 and a second assembly cavity for mounting the valve 100. The valve body 200 is provided with a first opening 2001, a second opening 2002, a third opening 2003 and a fourth opening 2004 in communication with the outside, the first opening 2001 and the second opening 2002 are respectively in communication with the first assembly cavity, the third opening 2003 and the fourth opening 2004 are respectively in communication with the second assembly cavity, and the valve body 200 is internally provided with a first communication channel 2005 and a second communication channel 2006. The second opening 2002 is always in communication with the first cavity 1101 through the second communication channel 2006, and the third opening 2003 is always in communication with the first communication channel 2005. On this basis, when the valve core 320 closes the second valve port 3001, the fluid in the first opening 2001 drives the first valve port 1001 to close, and the first opening 2001 is in communication with the third opening 2003 through the third valve port 3002 and the first communication channel 2005. When the valve core 320 closes the third valve port 3002, the fluid in the first opening 2001 drives the first valve port 1001 to open, and the first opening 2001 is in communication with the second opening 2002, and the fourth opening 2004 is in communication with the third opening 2003 through the first valve port 1001. It should be noted that in this embodiment, the valve seat 310, the valve seat assembly 110 and the valve body 200 are taken as relatively independent components for illustration. In some other embodiments of the present disclosure, the valve seat 310 can also be a part of the valve body 200, and the second valve port 3001 and the third valve port 3002 can be directly provided on the valve body 200. Furthermore, the valve seat assembly 110 of the valve 100 can also be a part of the valve body 200, and the first valve port 1001 can be directly provided on the valve body 200.

[0092] Specifically, when the second valve port 3001 of the electric valve 300 is closed, the first opening 2001 and the third opening 2003 of the valve body 200 are connected through the first connecting channel 2005. Under the action of the medium pressure (or under the combined action of the medium pressure and the elastic preload of the elastic element 124), the valve 100 closes the first valve port 1001, thereby realizing the mode of "the first opening 2001 and the third opening 2003 of the valve body 200 are connected, and the second opening 2002 and the fourth opening 2004 are closed". When the third valve port 3002 of the electric valve 300 is closed, the first opening 2001 of the valve body 200 is connected to the second opening 2002. The pressure of the second opening 2002 is transmitted to the top surface of the first piston 123 of the valve 100 through the second connecting channel 2006. At this time, the high-pressure medium pushes the first piston 123 to move downward and drives the valve stem 121 to move downward, thereby driving the second piston 122 to open the first valve port 1001, so that the third opening 2003 of the valve body 200 is connected to the fourth opening 2004, thus realizing the mode of "the first opening 2001 of the valve body 200 is connected to the second opening 2002, and the third opening 2003 is connected to the fourth opening 2004".

[0093] It should be noted that the combined four-way valve proposed in this disclosure can be implemented using valve devices of various structures to achieve the aforementioned electric valve 300. For example, such as Figures 10 to 12 As shown, the valve seat 310 of the electric valve 300 may be provided with a second valve port 3001, a third valve port 3002, a third valve hole 3003 and a fourth valve hole 3004. The third valve port 3002, the fourth valve hole 3004, the second valve port 3001 and the third valve hole 3003 are arranged in sequence from bottom to top on the valve seat 310. The valve core 320 is located in the valve cavity 1104 between the second valve port 3001 and the third valve port 3002. Under the drive of a drive mechanism 330 such as a motor, the valve stem can drive the valve core 320 to move up and down. When the valve core 320 moves upward to close the second valve port 3001, the second valve port 3001 is closed and the third valve port 3002 is open. At this time, the third valve port 3003 and the fourth valve port 3004 are disconnected. Therefore, the second opening 2002 connected to the third valve port 3003 is disconnected from the first opening 2001 connected to the fourth valve port 3004. The fourth valve port 3004 is connected to the third opening 2003 via the third valve port 3002 and the first connecting channel. When the valve core 320 moves downward to close the third valve port 3002, the third valve port 3002 is closed and the second valve port 3001 is open. At this time, the third valve port 3003 and the fourth valve port 3004 are connected via the second valve port 3001. Therefore, the second opening 2002 connected to the third valve port 3003 is connected to the first opening 2001 connected to the fourth valve port 3004.

[0094] like Figures 7 to 9 , Figure 13As shown, in an embodiment of the present disclosure, the first assembly cavity and the second assembly cavity are arranged along a first direction, which can be, for example, the direction D1 shown in the drawings. On this basis, the surface of the valve body 200 can be provided with a first heat insulation groove 210, which is at least partially located between the first assembly cavity and the second assembly cavity. Through the above design, the present disclosure can improve the heat insulation performance between the first assembly cavity and the second assembly cavity by using the first heat insulation groove 210, thereby reducing the heat exchange between the medium flowing in the electric valve 300 and the medium flowing in the valve 100. Specifically, taking an air conditioning system as an example, i.e., taking the medium as refrigerant as an example, in the mode of "the first opening 2001 and the second opening 2002 of the valve body 200 are communicated, and the third opening 2003 and the fourth opening 2004 are communicated", the present disclosure can reduce the heat transfer of high-temperature and low-temperature refrigerants in the valve body 200 by using the first heat insulation groove 210, thereby improving the system efficiency.

[0095] As shown in Figures 7 to 9 , Figure 13 , based on the design that the valve body 200 is provided with the first heat insulation groove 210, in an embodiment of the present disclosure, the first heat insulation groove 210 can be recessed in the surface of the valve body 200 perpendicular to a second direction, which can be, for example, the direction D2 shown in the drawings, and at least one of the first heat insulation grooves 210 can pass through the valve body 200 along a third direction, which can be, for example, the direction D3 shown in the drawings, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction. Through the above design, the present disclosure can further improve the heat insulation performance.

[0096] As shown in Figure 13 , based on the design that the valve body 200 is provided with the first heat insulation groove 210, in an embodiment of the present disclosure, the part of the valve body 200 provided with the first heat insulation groove 210 is a connecting portion 220, which can be further provided with a heat insulation hole 221 penetrating the connecting portion 220 along the second direction. Through the above design, the present disclosure can further improve the heat insulation performance. In some other embodiments of the present disclosure, the connecting portion 220 can also be provided with a second heat insulation groove, which can also penetrate the connecting portion 220 along the second direction, i.e., the slot opening of the second heat insulation groove is on the end surface of the connecting portion 220 perpendicular to the third direction. In addition, one or at least two of the above heat insulation structures can be provided on the connecting portion 220, which can all be the heat insulation hole 221, can all be the second heat insulation groove, or can be a combination of the heat insulation hole 221 and the second heat insulation groove, all without being limited to the present embodiment.

[0097] As shown in Figure 7 and Figure 8As shown, based on the design that the valve body 200 is provided with the first heat insulation groove 210, in an embodiment of the present disclosure, the two side surfaces of the valve body 200 perpendicular to the second direction can be respectively provided with the first heat insulation groove 210, and the positions of the two first heat insulation grooves 210 are oppositely arranged. Among them, the two first heat insulation grooves 210 can be different structures shown in the drawings, for example, one of the first heat insulation grooves 210 penetrates through the valve body 200 along the third direction, and the other first heat insulation groove 210 does not penetrate through the valve body 200 along the third direction, of course, the two first heat insulation grooves 210 can also be the same structure, and are not limited to the embodiment.

[0098] It should be noted that the combined four-way valve shown in the drawings and described in the specification is only a few examples of many combined four-way valves that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any detail or any component of the combined four-way valve shown in the drawings or described in the specification.

[0099] In summary, the valve 100 provided by the present disclosure includes a valve seat assembly 110 and a valve core assembly; the valve seat assembly 110 is provided with a first valve port 1001, a second valve port 1002 and a pressure valve port 1003; the valve seat assembly is internally provided with a cavity; the valve core assembly includes a first piston 123; the first piston 123 is movably arranged in the cavity and is in sealing cooperation with the inner wall of the cavity through a first sealing ring 126, and the first sealing ring 126 separates the cavity into a first cavity 1101 and a second cavity 1102 located on the two sides thereof respectively; the pressure valve port 1003 is always in communication with the first cavity 1101, and the first valve port 1002 is always in communication with the second cavity 1102; the force of the fluid in the first cavity 1101 acting on the first piston 123 is F1, and the force of the fluid in the second cavity 1102 acting on the first piston 123 is F2, one of F1 and F2 drives the valve core assembly to close the first valve port 1001, and the other one of F1 and F2 drives the valve core assembly to open the first valve port 1001; in the state that the valve core assembly opens the first valve port 1001, the first valve port 1001 is in communication with the first valve port 1002. Through the above design, the valve core assembly is controlled to be opened when the pressure medium is input through the pressure valve port 1003, so as to realize the controllable communication between the first valve port 1001 and the first valve port 1002, that is, the valve 100 at this time is a pressure control valve. Furthermore, when the pressure medium is not input through the pressure valve port 1003, the second piston 122 can be opened when the medium flows from the first valve port 1002 to the first valve port 1001 and closed when the medium flows reversely, so as to realize the automatic one-way flow of the first valve port 1001 and the first valve port 1002, that is, the valve 100 at this time is a one-way valve.

[0100] The exemplary embodiments of the valve and combination four-way valve presented by the present disclosure are described and / or illustrated above. However, the embodiments of the present disclosure are not limited to the specific embodiments described above, but include any and all implementations of the present disclosure. Each of the elements and / or components of an embodiment can be used independently and separately, i.e., the element and / or component can be combined with some of the elements and / or components and can be discarded and / or replaced with alternative elements and / or components. The use herein of "one", "another", or "an" element or component, including the use of "one", "another", or "an" element or component of the present disclosure, is intended to cover the implementation of at least one or more such element or component. The use herein of "a number of" an element or component, such as "a plurality of elements" or "a plurality of components", is intended to cover implementation of at least one or more such element or component. The terms "first", "second", and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "comprises", "comprising", "includes", "including", and the like, are inclusive and open-ended and specify the presence of stated elements or components but do not preclude the presence or addition of one or more other elements or components.

[0101] While the valve and combination four-way valve presented by the present disclosure have been described in terms of various specific embodiments, those skilled in the art will recognize that the embodiments of the present disclosure can be practiced with modifications of the present disclosure, within the spirit and scope of the claims, which are appended hereto.

Claims

1. A valve (100) characterized by, The utility model relates to a valve seat assembly (110) which is provided with a first valve port (1001), a first valve hole (1002) and a pressure valve port (1003); the valve seat assembly (110) is internally provided with a cavity; and A valve core assembly which comprises a first piston (123); the first piston (123) is movably arranged in the cavity and is sealed with the inner wall of the cavity through a first sealing ring (126), the first sealing ring (126) separates the cavity into a first cavity (1101) and a second cavity (1102) which are respectively located on the two sides of the cavity; the pressure valve port (1003) is always in communication with the first cavity (1101), and the first valve hole (1002) is always in communication with the second cavity (1102); Wherein, the acting force of the fluid in the first cavity (1101) on the first piston (123) is F1, the acting force of the fluid in the second cavity (1102) on the first piston (123) is F2, one of F1 and F2 drives the valve core assembly to close the first valve port (1001), and the other one drives the valve core assembly to open the first valve port (1001); in the state that the valve core assembly opens the first valve port (1001), the first valve port (1001) is in communication with the first valve hole (1002). The valve core assembly further comprises a valve rod (121) and a second piston (122); the first piston (123) and the second piston (122) are respectively arranged at the two ends of the valve rod (121), and the second piston (122) closes or opens the first valve port (1001).

2. Valve (100) according to claim 1, characterized in that The inner wall of the second cavity (1102) is provided with a protruding section (11021) which faces the valve rod (121), and the valve rod (121) penetrates through the protruding section (11021); the second cavity (1102) comprises a valve cavity (1104) and a piston cavity (1103) which are located on the two sides of the protruding section (11021) and are in communication, the first piston (123) is located between the first cavity (1101) and the piston cavity (1103), the second piston (122) is located in the valve cavity (1104), the first valve port (1001) is arranged in the piston cavity (1103), and the first valve hole (1002) is in communication with the valve cavity (1104).

3. Valve (100) according to claim 2, characterized in that The protruding section (11021) is further provided with a communication channel (1105) which communicates the valve cavity (1104) and the piston cavity (1103).

4. Valve (100) according to claim 3, characterized in that ​ 5. The valve (100) according to claim 1, characterized in that The valve seat assembly (110) comprises a first seat body (111) and a second seat body (112) connected above the first seat body (111); the second cavity (1102) is arranged in the first seat body (111), and the second cavity (1102) forms the first valve port (1001) at the bottom of the first seat body (111); the pressure valve port (1003) is arranged in the first seat body (111) and / or the second seat body (112); and a part gap is arranged between the first seat body (111) and the second seat body (112) to form the first cavity (1101).

6. Valve (100) according to claim 5, characterized in that The second seat body (112) is provided with a limiting surface (1121), and the first piston (123) abuts against the limiting surface (1121) when moving to the farthest distance relative to the first valve port (1001).

7. The valve (100) according to claim 1, characterized in that The valve core assembly further comprises: a valve rod (121) and a second piston (122); the first piston (123) and the second piston (122) are arranged at two ends of the valve rod (121) respectively, and the second piston (122) closes or opens the first valve port (1001); a resilient member (124) connected to the inner wall of the second cavity (1102) at one end and connected to the valve rod (121) or the first piston (123) at the other end, and used for applying a force to the first piston (123) in the direction of closing the first valve port (1001).

8. Valve (100) according to claim 7, characterized in that The bottom surface of the first piston (123) is provided with a first groove (1231), and the groove walls of the first groove (1231) are spaced apart to surround the valve rod (121), so that the first groove (1231) and the valve rod (121) jointly form a ring-shaped accommodating groove; the resilient member (124) is a spring, and the spring is arranged around the valve rod (121), and part of the spring is located in the ring-shaped accommodating groove.

9. The valve (100) according to claim 7, characterized in that The valve rod (121) has an assembly part (1211) and a limiting part (1212) connected or integrally arranged in the axial direction, the assembly part (1211) is a part of the valve rod (121) sleeved with the first piston (123), the limiting part (1212) is connected to the top of the assembly part (1211) and located in the first cavity (1101), the first piston (123) is provided with a piston hole (1232) for the assembly part (1211) to pass through, and the width of the limiting part (1212) is greater than the hole diameter of the piston hole (1232).

10. The valve (100) according to claim 1, characterized in that The valve core assembly is located in the cavity of the valve seat assembly (110), the first valve port (1001) is located in the second cavity (1102), the second cavity (1102) is further provided with a second valve hole (1004), the first valve port (1001) is located between the first valve hole (1002) and the second valve hole (1004), the valve core assembly further comprises a second piston (122) connected with the first piston (123), and the second piston (122) closes or opens the first valve port (1001).

11. Valve (100) according to claim 10, characterized in that The valve seat assembly (110) is provided with a second groove (1106), at least part of the second piston (122) extends into the second groove (1106) and moves axially along the wall of the second groove (1106), and the end of the second piston (122) opposite to the bottom wall of the second groove (1106) is limited by the bottom wall of the second groove (1106).

12. The valve (100) according to claim 10, characterized in that The end of the second piston (122) away from the first piston (123) is provided with an elastic element (124) between the inner wall of the valve seat assembly (110), and the elastic force of the elastic element (124) is directed to the first valve port (1001).

13. A combination four-way valve characterized by Comprise: The valve (100) of any one of claims 1-12; The electric valve (300) comprises a valve seat (310) and a valve core (320), the valve seat (310) is provided with a second valve port (3001) and a third valve port (3002); the valve core (320) is in sealing cooperation with the second valve port (3001) or the third valve port (3002); The valve body (200) is internally provided with a first assembly cavity for mounting the electric valve (300) and a second assembly cavity for mounting the valve (100); the valve body (200) is provided with a first opening (2001), a second opening (2002), a third opening (2003) and a fourth opening (2004) which are in communication with the outside, the first opening (2001) and the second opening (2002) are respectively in communication with the first assembly cavity, and the third opening (2003) and the fourth opening (2004) are respectively in communication with the second assembly cavity; the valve body (200) is internally provided with a first communication channel (2005) and a second communication channel (2006); the second opening (2002) is always in communication with the first cavity (1101) through the second communication channel (2006), and the third opening (2003) is always in communication with the first communication channel (2005); Wherein, when the valve core (320) closes the second valve port (3001), the fluid in the first opening (2001) drives the first valve port (1001) to close, and the first opening (2001) is in communication with the third opening (2003) through the third valve port (3002) and the first communication channel (2005); when the valve core (320) closes the third valve port (3002), the fluid in the first opening (2001) drives the first valve port (1001) to open, and the first opening (2001) is in communication with the second opening (2002), and the fourth opening (2004) is in communication with the third opening (2003) through the first valve port (1001).

14. The combination four-way valve of claim 13, wherein, The first assembly cavity and the second assembly cavity are arranged in a first direction; wherein the surface of the valve body (200) is provided with a first heat insulation groove (210), and the first heat insulation groove (210) is at least partially located between the first assembly cavity and the second assembly cavity.

15. The combination four-way valve of claim 14, wherein, The first heat insulation groove (210) is recessed in a surface of the valve body (200) perpendicular to a second direction, and penetrates the valve body (200) along a third direction, the second direction being perpendicular to the first direction, and the third direction being perpendicular to the first direction and perpendicular to the second direction.

16. The combination four-way valve of claim 15, wherein, The valve body (200) is provided with a connecting portion (220) of the first heat insulation groove (210), and the connecting portion (220) is provided with a second heat insulation groove and / or a heat insulation hole (221), the second heat insulation groove or the heat insulation hole (221) penetrating the connecting portion (220) along the second direction.

17. The combination four-way valve of claim 15, wherein, The valve body (200) is provided with the first heat insulation groove (210) on two side surfaces perpendicular to the second direction, respectively, and the positions of the two first heat insulation grooves (210) are oppositely arranged.

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