Valve element, four-way valve, heat pump system and vehicle

Abstract

A valve core, a four-way valve, a heat pump system and a vehicle, the valve core (100) comprises a cylindrical valve core body (1), the valve core body (1) is internally provided with a flow channel, the flow channel extends along the axial direction of the valve core body (1), and an inlet and an outlet are formed in the peripheral side of the valve core body; in the axial direction of the valve element body (1), the ratio of the height of the flow channel to the height of the valve element body ranges from 0.5 to 0.95; therefore, the runner is provided with a larger circulation channel, and the applicability of the valve element is improved.

Description

Valve core, four-way valve, heat pump system and vehicle

[0001] This application claims priority to the Chinese patent application filed on December 26, 2023, with application number 202323586191.8, entitled "Valve Core, Four-Way Valve, Heat Pump System and Vehicle", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of flow control devices. Specifically, the present application relates to a valve core, a four-way valve, a heat pump system and a vehicle. Background Art

[0003] Control valves are essential components for flow control. For example, a four-way valve is a control valve with four valve ports. When the valve is in operation, the rotating rotor, driven by a transmission mechanism, drives the valve core within the valve body, thereby switching the connections between the four valve ports.

[0004] However, the cross-sectional area of ​​the flow channel on the existing valve core is small, which limits the upper limit of the flow rate controlled by the four-way valve and reduces the applicability of the four-way valve.

[0005] Summary of the Invention

[0006] An object of the present application is to provide a new technical solution for a valve core, a four-way valve, a heat pump system and a vehicle.

[0007] According to a first aspect of the present application, a valve core is provided, comprising:

[0008] A valve core body, the valve core body is cylindrical, and a flow channel is provided in the valve core body. The flow channel extends along the axial direction of the valve core body and forms an inlet and an outlet on the outer peripheral side of the valve core body;

[0009] In the axial direction of the valve core body, the ratio of the height of the flow channel to the height of the valve core body is in a range of 0.5-0.95.

[0010] Optionally, the flow channel includes a first flow channel and a second flow channel, the first flow channel extending along the axial direction of the valve core body and forming a first inlet and a first outlet on the outer peripheral side of the valve core body, and the second flow channel extending along the axial direction of the valve core body and forming a second inlet and a second outlet on the outer peripheral side of the valve core body;

[0011] In the axial direction of the valve core body, the ratio of the height of the first flow channel to the height of the valve core body is in the range of 0.5-0.95, and / or,

[0012] In the axial direction of the valve core body, the ratio of the height of the second flow channel to the height of the valve core body is in a range of 0.5-0.95.

[0013] Optionally, in the flow direction of the first flow channel, the cross section of the first flow channel is square, and / or,

[0014] In the flow direction of the second flow channel, the cross section of the second flow channel is square.

[0015] Optionally, in the axial direction of the valve core body, the first flow channel has a first section of flow channel and a second section of flow channel, and the second flow channel has a third section of flow channel and a fourth section of flow channel, the first section of flow channel and the second section of flow channel are sequentially connected between the first inlet and the first outlet and form a first included angle, and the third section of flow channel and the fourth section of flow channel are sequentially connected between the second inlet and the second outlet and form a second included angle;

[0016] The first angle is in a range of 100-150°, and the second angle is in a range of 100-150°.

[0017] Optionally, the first flow channel and the second flow channel are symmetrically arranged in the valve core body.

[0018] Optionally, the volume ratio of the flow channel to the volume of the valve core body ranges from 35% to 60%.

[0019] Optionally, one end of the valve core body has a coaxially arranged first conical surface, and the first conical surface is configured to withstand axial and radial clamping forces.

[0020] Optionally, the angle between the first conical surface and the axial direction of the valve core body ranges from 30° to 60°.

[0021] Optionally, the other end of the valve core body has a coaxially arranged second conical surface, and the second conical surface is configured to withstand axial and radial clamping forces;

[0022] The included angle between the second conical surface and the axial direction of the valve core body is in the range of 30°-60°.

[0023] Optionally, end portions of the first flow channel close to the first inlet and the first outlet are both provided with port platforms, and both sides of the port platforms have arc-shaped chamfers.

[0024] Optionally, a transmission groove is provided at one end of the valve core body, and the transmission groove is used to receive a driving force for driving the valve core to rotate.

[0025] According to a second aspect of the present application, a four-way valve is provided, comprising a valve body, a valve seat and the valve core described in the first aspect;

[0026] A cavity is formed inside the valve body, a cylindrical cavity is formed in the valve seat, the valve seat is installed in the cavity, and the valve core is arranged in the cylindrical cavity.

[0027] Optionally, a sealing member is further included, wherein the valve seat includes a plurality of sub-valve seats, and the plurality of sub-valve seats surround the circumference of the valve core;

[0028] A groove is provided on a side of the sub-valve seat close to the valve body, and the sealing member is embedded in the groove and abuts against the valve body, so that the sub-valve seat fits the valve core.

[0029] Optionally, the valve seat includes four sub-valve seats, each sub-valve seat is provided with a communication port, and the four communication ports are respectively connected to the first inlet, the first outlet, the second inlet and the second outlet.

[0030] Optionally, a first gasket is further included. The valve body is provided with a first opening communicating with the cavity. The first gasket abuts between the first conical surface and the edge of the first opening.

[0031] Optionally, a bottom cover is further included, and a second opening communicating with the cavity is provided on the valve body. The bottom cover is connected to the second opening and abuts against the second conical surface through a second gasket.

[0032] Optionally, a limiting shaft is further included, and the side of the sub-valve seat close to the adjacent sub-valve seat has an assembly inclined surface and a limiting surface, an assembly gap is formed between adjacent assembly inclined surfaces, and the limiting shaft abuts between adjacent limiting surfaces.

[0033] According to a third aspect of the present application, a heat pump system is provided, comprising the four-way valve described in the second aspect.

[0034] According to a fourth aspect of the present application, a vehicle is provided, comprising the heat pump system according to the third aspect.

[0035] The present application provides a valve core, which includes a valve core body, which is cylindrical, and a first flow channel and a second flow channel are arranged in the valve core body. The first flow channel extends along the axial direction of the valve core body and forms a first inlet and a first outlet on the outer peripheral side of the valve core body, and the second flow channel extends along the axial direction of the valve core body and forms a second inlet and a second outlet on the outer peripheral side of the valve core body; in the axial direction of the valve core body, the ratio of the height of the first flow channel to the height of the valve core body is in the range of 0.5-0.95, so that the flow channel has a larger flow channel, thereby improving the applicability of the valve core.

[0036] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0038] FIG1 is a schematic diagram of an assembly of a valve core provided in an embodiment of the present application;

[0039] FIG2 is a front view of a valve core provided in an embodiment of the present application;

[0040] FIG3 is a cross-sectional view (radial direction) of a valve core provided in an embodiment of the present application;

[0041] FIG4 is a cross-sectional view (axial direction) of a valve core provided in an embodiment of the present application;

[0042] FIG5 is a partial cross-sectional view (axial direction) of a valve core provided in an embodiment of the present application;

[0043] Figure 6 is an enlarged view of point A in Figure 3;

[0044] FIG7 is an enlarged view of point B in FIG3 ;

[0045] FIG8 is a schematic diagram of an assembly of a valve core and a valve seat provided in an embodiment of the present application;

[0046] FIG9 is a schematic diagram of a valve body provided in an embodiment of the present application;

[0047] FIG10 is a first cross-sectional view of a valve body provided in an embodiment of the present application;

[0048] FIG11 is a second cross-sectional view of a valve body provided in an embodiment of the present application;

[0049] FIG12 is a cross-sectional view (radial direction) of a four-way valve provided by an embodiment of the present application when the valve core is in a first state;

[0050] FIG13 is a cross-sectional view (axial direction) of a four-way valve provided by an embodiment of the present application when the valve core is in a first state;

[0051] FIG14 is a cross-sectional view (radial direction) of a four-way valve provided by an embodiment of the present application when the valve core is in a second state;

[0052] FIG15 is a cross-sectional view (axial direction) of a four-way valve provided by an embodiment of the present application when the valve core is in a second state;

[0053] FIG16 is a first schematic diagram of a valve seat provided in an embodiment of the present application;

[0054] FIG17 is a second schematic diagram of a valve seat provided in an embodiment of the present application;

[0055] FIG18 is a cross-sectional view of a valve seat provided in an embodiment of the present application;

[0056] FIG19 is a schematic diagram of a bottom cover provided in an embodiment of the present application;

[0057] FIG20 is a cross-sectional view (radial direction) of a four-way valve provided in an embodiment of the present application;

[0058] FIG21 is an enlarged view of point C in FIG20 ;

[0059] FIG22 is an enlarged view of point D in FIG20 .

[0060] Explanation of the reference numerals: 100: valve core 1: valve core body 11: first flow channel 12: second flow channel 13: first conical surface 14: second conical surface 15: port platform 16: arc chamfer 2: transmission groove 200: valve body 201: cavity 2011: first cavity 2012: second cavity 202: first limiting hole 203: first channel opening 204: second channel opening 205: third channel opening 206: fourth channel opening 207: positioning hole 300: valve seat 301: sub-valve seat 3011: assembly inclined surface 3012: limiting surface 302: groove 303: connecting port 400: sealing element 500: first gasket 600: first sealing ring 700: bottom cover 701: positioning groove 702: annular groove 703: positioning pin 704: second limiting hole 800: second gasket 900: second sealing ring 1000: limiting axis DETAILED DESCRIPTION

[0061] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0062] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0063] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0064] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0066] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0067] 1 to 4 , an embodiment of the present application provides a valve core, comprising:

[0068] A valve core body 1 is cylindrical and has a flow channel disposed therein. The flow channel extends along the axial direction of the valve core body 1 and forms an inlet and an outlet on the outer peripheral side of the valve core body 1;

[0069] In the axial direction of the valve core body 1 , the ratio of the height of the flow channel to the height of the valve core body 1 is in a range of 0.5-0.95.

[0070] Specifically, a first flow channel 11 and a second flow channel 12 are provided in the valve core body 1. The first flow channel 11 extends along the axial direction of the valve core body 1 and forms a first inlet and a first outlet on the outer peripheral side of the valve core body 1. The second flow channel 12 extends along the axial direction of the valve core body 1 and forms a second inlet and a second outlet on the outer peripheral side of the valve core body 1.

[0071] In the axial direction of the valve core body 1 , the ratio of the height of the first flow channel 11 to the height of the valve core body 1 is in the range of 0.5-0.95, and / or,

[0072] In the axial direction of the valve core body 1 , the ratio of the height of the second flow channel 12 to the height of the valve core body 1 is in a range of 0.5-0.95.

[0073] Specifically, the valve core body 1 is configured to be cylindrical, and the axial direction of the valve core body 1 may be the Z direction in FIG. 2 .

[0074] In one embodiment, the first inlet, the first outlet, the second inlet and the second outlet can be distributed at equal intervals on the outer peripheral side of the valve core body 1, that is, the first inlet, the first outlet, the second inlet and the second outlet are arranged in sequence at intervals of 90 degrees, thereby improving the balance of the medium flow in the valve core.

[0075] When the first flow channel 11 extends axially along the valve core body 1 , the flow area of ​​the first flow channel 11 can fully utilize the axial space of the valve core body 1 to increase the flow area of ​​the first flow channel 11 and the flow rate of the first flow channel 11 .

[0076] When the second flow channel 12 extends along the axial direction of the valve core body 1 , the flow area of ​​the second flow channel 12 can fully utilize the axial space of the valve core body 1 to increase the flow area of ​​the second flow channel 12 and increase the flow rate of the second flow channel 12 .

[0077] Specifically, referring to Figure 3, the height of the first flow channel 11 is h, the height of the valve core body 1 is H, and the ratio of the height h of the first flow channel 11 to the height H of the valve core body 1 is in the range of 0.5-0.95. For example, the ratio of h / H can be 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85 or 0.90, that is, the height of the first flow channel 11 occupies more than half of the height of the valve core body 1, and the flow rate of the first flow channel 11 is increased by increasing the flow area of ​​the first flow channel 11.

[0078] In one embodiment, in the axial direction of the valve core body 1, the height of the second flow channel 12 is equal to the height of the first flow channel 11, and the ratio of the height h of the second flow channel 12 to the height H of the valve core body 1 can also be in the range of 0.5-0.95, that is, the height of the second flow channel 12 occupies more than half of the height of the valve core body 1, and the flow rate of the second flow channel 12 is increased by increasing the flow area of ​​the second flow channel 12.

[0079] Compared with the spherical valve core, the cylindrical valve core provided in the embodiment of the present application can increase the diameter of the valve core while keeping the height of the valve core unchanged, that is, the flow channel has a larger flow channel, thereby improving the applicability of the valve core.

[0080] The valve core provided in the embodiment of the present application includes a valve core body 1, which is cylindrical. A first flow channel 11 and a second flow channel 12 are provided in the valve core body 1. The first flow channel 11 extends along the axial direction of the valve core body 1 and forms a first inlet and a first outlet on the outer peripheral side of the valve core body 1. The second flow channel 12 extends along the axial direction of the valve core body 1 and forms a second inlet and a second outlet on the outer peripheral side of the valve core body 1. In the axial direction of the valve core body 1, the ratio of the height of the first flow channel 11 to the height of the valve core body 1 is in the range of 0.5-0.95, so that the flow channel has a larger circulation channel, thereby improving the applicability of the valve core.

[0081] Optionally, referring to FIG2 , in the flow direction of the first flow channel 11 , the cross section of the first flow channel 11 is square, and / or,

[0082] In the flow direction of the second flow channel 12 , the cross section of the second flow channel 12 is square.

[0083] Specifically, the flow through the first flow channel 11 and the second flow channel 12 can flow radially along the valve core body 1. Because the valve core body 1 is cylindrical, the square cross-sections of the first flow channel 11 and the second flow channel 12 can extend along the axis of the valve core body 1, fully utilizing the volume of the valve core body 1. While the volume of the entire valve core remains unchanged, the flow areas of the first flow channel 11 and the second flow channel 12 are increased.

[0084] Optionally, referring to FIG4 , in the axial direction of the valve core body 1 , the first flow channel 11 has a first flow channel section and a second flow channel section, and the second flow channel 12 has a third flow channel section and a fourth flow channel section, the first flow channel section and the second flow channel section are sequentially connected between the first inlet and the first outlet and form a first included angle, and the third flow channel section and the fourth flow channel section are sequentially connected between the second inlet and the second outlet and form a second included angle;

[0085] The first angle is in a range of 100-150°, and the second angle is in a range of 100-150°.

[0086] Specifically, the first angle can be 110°, 120°, 130°, or 140°, and the second angle can be 110°, 120°, 130°, or 140°. The first and second sections of the flow channel can form a V-shaped first flow channel 11 with an obtuse angle, and the third and fourth sections of the flow channel can form a V-shaped second flow channel 12 with an obtuse angle. The V-shaped flow channel can extend the flow path of the first and second flow channels 11, 12 within the valve core body 1 and provide a buffer for the flow of the medium in the first and second flow channels 11, 12.

[0087] Furthermore, when the angle range of the first angle is 100-150° and the angle range of the second angle is 100-150°, the flow resistance of the medium at the connection between the first section of the flow channel and the second section of the flow channel can be reduced, and the flow resistance of the medium at the connection between the third section of the flow channel and the fourth section of the flow channel can be reduced, thereby ensuring the smooth flow of the medium in the first flow channel 11 and the second flow channel 12.

[0088] Optionally, the first flow channel 11 and the second flow channel 12 are symmetrically arranged in the valve core body 1.

[0089] Specifically, referring to Figure 4, the first flow channel 11 and the second flow channel 12 are symmetrically distributed in the valve core body 1. The inlet and outlet corresponding to the first flow channel 11 and the second flow channel 12 can be switched by rotating the valve core body 1 to achieve the purpose of flexibly adjusting the medium flow direction.

[0090] Optionally, the volume ratio of the flow channel to the valve core body 1 ranges from 35% to 60%, and specifically, the volume ratio of the flow channel to the valve core body 1 can be set to 40%, 45%, 50% or 55%.

[0091] Specifically, since the valve core body 1 is set to be cylindrical, the first flow channel 11 and the second flow channel 12 can extend along the axial direction of the valve core body 1 to increase the height of the first flow channel 11 and the second flow channel 12. At the same time, the first flow channel 11 and the second flow channel 12 can extend along the circumference of the valve core body 1 to increase the width of the first flow channel 11 and the second flow channel 12, thereby making full use of the volume of the valve core body 1 to set the first flow channel 11 and the second flow channel 12, thereby increasing the flow area of ​​the first flow channel 11 and the second flow channel 12.

[0092] Optionally, referring to FIG. 3 and FIG. 6 , one end of the valve core body 1 has a coaxially arranged first conical surface 13 , and the first conical surface 13 is configured to withstand axial and radial clamping forces.

[0093] Specifically, when the valve core body 1 is positioned, a force can be applied to the first conical surface 13, and the force is perpendicular to the first conical surface 13, thereby generating axial and radial component forces along the valve core body 1, so that on the basis of axial positioning of the valve core body 1, the valve core body 1 can also be positioned radially.

[0094] It should be noted that the first conical surface 13 may be the outer surface of a complete cone or the outer surface of a truncated cone.

[0095] Optionally, referring to FIG. 3 and FIG. 6 , the angle between the first conical surface 13 and the axial direction of the valve core body 1 is in the range of 30°-60°.

[0096] Specifically, when the angle between the first conical surface 13 and the axial direction of the valve core body 1 is in the range of 30°-60°, the force applied to the first conical surface 13 can generate balanced force components in the axial and radial directions of the valve core body 1 .

[0097] In one embodiment, the first conical surface 13 is designed as a 45° conical surface, that is, the axial angle between the first conical surface 13 and the valve core body 1 is 45°. When the first conical surface 13 is subjected to force, the pressure N1 exerted on the fitting surface formed by the first conical surface 13 will be decomposed into an axial component F1z and a diameter component F1r, which provides the valve core body 1 with an axial positioning pressure while also providing the valve core body 1 with a diameter positioning force.

[0098] Optionally, referring to FIG3 and FIG7 , the other end of the valve core body 1 has a coaxially arranged second conical surface 14 , and the second conical surface 14 is configured to withstand axial and radial clamping forces;

[0099] The included angle between the second conical surface 14 and the axial direction of the valve core body 1 is in the range of 30°-60°.

[0100] Specifically, when the angle between the second conical surface 14 and the axial direction of the valve core body 1 is in the range of 30°-60°, the force applied to the second conical surface 14 can generate balanced force components in the axial and radial directions of the valve core body 1 .

[0101] In one embodiment, the second conical surface 14 is designed as a 45° conical surface, that is, the axial angle between the second conical surface 14 and the valve core body 1 is 45°. The pressure N2 exerted on the second conical surface 14 will be decomposed into an axial component F2z and a diameter component F2r, which provides the valve core body 1 with an axial positioning pressure while also providing the valve core body 1 with a diameter positioning force.

[0102] Furthermore, under the action of pressures N1 and N2, the axial direction component force F1z and the axial direction component force F2z of the valve core body 1 are balanced with each other, which can ensure the stability of the axial position of the valve core body 1; and the first conical surface 13 can fit tightly with the first gasket 500, and the second conical surface 14 can fit tightly with the second gasket 800, so as to have a sealing effect on the valve core.

[0103] Optionally, referring to FIG. 5 , end portions of the first flow channel 11 close to the first inlet and the first outlet are both provided with port platforms 15 , and both sides of the port platforms 15 have arc-shaped chamfers 16 .

[0104] Specifically, the valve core body 1 can rotate in the valve seat to facilitate adjustment of the flow direction of the medium in the valve core body 1; and the ends of the first flow channel 11 close to the first inlet and the first outlet have arc chamfers 16 on both sides of the circumference, which can reduce the wear of the valve core body 1 on the valve seat 300 when the valve core body 1 rotates, thereby improving the quietness of the rotation of the valve core body 1 and the service life of the valve seat 300.

[0105] Optionally, referring to FIG. 3 and FIG. 5 , a transmission groove 2 is provided at one end of the valve core body 1 , and the transmission groove 2 is used to receive a driving force for driving the valve core to rotate.

[0106] Specifically, the transmission groove 2 can cooperate with the drive shaft of the valve core external driver (not shown in the figure), and the power of the driver is transmitted to the valve core body 1 through the drive shaft to drive the valve core body 1 to rotate clockwise and counterclockwise in the valve seat.

[0107] In one embodiment, the valve core body 1 can rotate 90° clockwise and 90° counterclockwise in the valve seat.

[0108] 8 and 9 , an embodiment of the present application provides a four-way valve, which includes a valve body 200 , a valve seat 300 , and the valve core 100 ;

[0109] A cavity 201 is formed inside the valve body 200 , a cylindrical cavity is formed in the valve seat 300 , the valve seat 300 is installed in the cavity 201 , and the valve core 100 is disposed in the cylindrical cavity.

[0110] Specifically, the valve core 100 is capable of rotating within the valve seat 300. The valve core 100 includes a valve core body 1, which is cylindrical and has a first flow channel 11 and a second flow channel 12 disposed therein. The first flow channel 11 extends axially along the valve core body 1 and forms a first inlet and a first outlet on the outer circumference of the valve core body 1. The second flow channel 12 extends axially along the valve core body 1 and forms a second inlet and a second outlet on the outer circumference of the valve core body 1. In the axial direction of the valve core body 1, the ratio of the height of the first flow channel 11 to the height of the valve core body 1 is in a range of 0.5-0.95, thereby providing a larger flow channel and improving the applicability of the four-way valve.

[0111] Optionally, referring to FIG8 and FIG9 , the four-way valve further includes a sealing member 400 , and the valve seat 300 includes a plurality of sub-valve seats 301 , and the plurality of sub-valve seats 301 surround the circumference of the valve core 100 ;

[0112] A groove 302 is provided on a side of the sub-valve seat 301 close to the valve body 200 . The sealing member 400 is embedded in the groove 302 and abuts against the valve body 200 , so that the sub-valve seat 301 fits the valve core 100 .

[0113] Specifically, the seal 400 can be a sealing strip with a circular cross-section. Part of the seal 400 is embedded in the groove 302, while part of the seal 400 extends out of the groove 302 and abuts against the inner wall of the cavity 201 in the valve body 200. The seal 400 is compressed between the groove 302 and the inner wall of the cavity 201, and the compression ratio of the seal 400 can range from 15% to 25%.

[0114] The reaction force generated by the compression of the sealing member 400 can make the inner cylindrical surface of the valve seat 300 fit tightly with the outer cylindrical surface of the valve core body 1, preventing the working medium in the flow channel from leaking outward and ensuring the sealing of the flow channel.

[0115] Optionally, referring to FIG. 16 and FIG. 17 , the valve seat 300 includes four sub-valve seats 301 , each of which is provided with a communication port 303 , which is respectively connected to the first inlet, the first outlet, the second inlet, and the second outlet.

[0116] In one embodiment, the groove 302 may be an annular groove and is disposed around the communication port 303 , and the annular sealing member 400 is correspondingly embedded in the annular groove.

[0117] The communication ports 303 are respectively connected to the first inlet, the first outlet, the second inlet and the second outlet, which facilitates the communication between the flow channel in the valve core and the outside, thereby ensuring smooth flow of the flow channel.

[0118] Optionally, referring to FIG. 20 and FIG. 21 , the four-way valve further includes a first gasket 500 , and the valve body 200 is provided with a first opening communicating with the cavity 201 , the transmission groove 2 is exposed from the first opening and is used to receive a driving force for driving the valve core 100 to rotate;

[0119] The first gasket 500 abuts between the first conical surface 13 and the edge of the first opening.

[0120] Specifically, the first gasket 500 can abut against the first conical surface 13 on the valve core body 1 which is designed to be inclined at 45°. The pressure of the first gasket 500 on the first conical surface 13 of the valve core body 1 will generate a centripetal component force. This centripetal component force plays a role in positioning the valve core body 1 so that the valve core body 1 does not deviate during operation.

[0121] In one embodiment, the four-way valve further includes a first sealing ring 600 , and the cavity 201 includes a first cavity 2011 and a second cavity 2012 ;

[0122] The upper positioning assembly, consisting of a first sealing ring 600 and a first gasket 500, is installed within the first cavity 2011 of the valve body 200. The first sealing ring 600 is compressed by a ratio ranging from 15% to 25%. The reaction force generated by the compression of the first gasket 500 causes the first gasket 500 to fit tightly against the valve core body 1, preventing the working medium in the second cavity 2012 from leaking into the first cavity 2011.

[0123] The valve seat assembly, which is composed of four sub-valve seats 301 and corresponding sealing members 400 , is installed in the second cavity 2012 of the valve body 200 .

[0124] Optionally, referring to Figures 19 and 22, the four-way valve further includes a bottom cover 700, the valve body 200 is provided with a second opening communicating with the cavity 201, the bottom cover 700 is connected to the second opening and abuts against the second conical surface 14 through a second gasket 800.

[0125] Specifically, the second gasket 800 can cooperate with the second conical surface 14 of the valve core body 1. The second conical surface 14 is designed to be a conical surface inclined at 45°. The second gasket 800 will generate a centripetal component force on the pressure of the valve core body 1 on the second conical surface 14. This centripetal component force plays a role in positioning the valve core body 1, so that the valve core body 1 does not deviate during operation.

[0126] In one embodiment, a second sealing ring 900 is further included. Referring to FIG. 22 , a bottom cover assembly consisting of the second sealing ring 900 and the second gasket 800 is installed at the bottom of the second cavity 2012 of the valve body 200 .

[0127] In one embodiment, the bottom cover 700 is provided with a positioning groove 701 for accommodating the second gasket 800 and an annular groove 702 for accommodating the second sealing ring 900. The second sealing ring 900 is compressed between the valve body 200 and the bottom cover 700, and the compression ratio of the second sealing ring 900 ranges from 15% to 25%. When compressed, the second sealing ring 900 seals the internal cavity of the valve body 200, preventing the working medium from leaking out of the valve body 200.

[0128] In one embodiment, the bottom cover 700 is connected to the valve body 200 by fastening members such as bolts or pins, and the positioning pin 703 is plugged into the positioning hole 207 on the valve body 200 to ensure the accuracy of assembly between the valve body 200 and the bottom cover 700.

[0129] Optionally, referring to Figures 1 and 12, the four-way valve also includes a limiting shaft 1000, and the side of the sub-valve seat 301 close to the adjacent sub-valve seat 301 has an assembly bevel 3011 and a limiting surface 3012, and an assembly gap is formed between adjacent assembly bevels 3011, and the limiting shaft 1000 abuts between adjacent limiting surfaces 3012.

[0130] Specifically, a first limiting hole 202 through which the limiting shaft 1000 is passed is provided on the valve body 200, and a second limiting hole 704 through which the limiting shaft 1000 is passed is provided on the bottom cover 700. When the valve core body 1 rotates, the setting of the limiting shaft 1000 can prevent the valve seat 300 from being displaced under the friction force generated by the valve core body 1, thereby avoiding rotational displacement of the valve seat 300.

[0131] In one embodiment, referring to FIG. 9 to FIG. 11 , the valve body 200 is provided with a first channel opening 203 , a second channel opening 204 , a third channel opening 205 , and a fourth channel opening 206 .

[0132] When the valve core is in the first state shown in FIG13 , the first channel opening 203 is connected to the fourth channel opening 206 through the first flow channel 11 , while the second channel opening 204 is connected to the third channel opening 205 through the second flow channel 12 to form two independent flow channels.

[0133] When the valve core is in the second state shown in Figure 15, the valve core rotates 90° relative to the valve core in Figure 13, and the first channel port 203 is connected to the second channel port 204 through the first channel 11, while the third channel port 205 is connected to the fourth channel port 206 through the second channel 12. That is, the path of blocking the flow in the four-way valve can be switched by rotating the valve core, thereby improving the flexibility of the medium flow in the four-way valve.

[0134] An embodiment of the present application provides a heat pump system, which includes at least one of the four-way valves described above.

[0135] Specifically, the four-way valve is used in the heat pump system of a vehicle. When the heat pump system is working, the working medium inside the heat pump flows through the flow channel in the above-mentioned four-way valve. The flow direction of the working medium in the heat pump system can be changed by rotating the valve core, thereby improving the flexibility of the medium circulation in the heat pump system.

[0136] Specifically, the working medium may be a refrigerant.

[0137] An embodiment of the present application also provides a vehicle, which includes the heat pump system.

[0138] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A valve core, characterized in that, Comprising: A valve core body (1), the valve core body (1) being cylindrical, a flow channel being provided inside the valve core body (1), the flow channel extending along the axial direction of the valve core body (1) and forming an inlet and an outlet on the outer peripheral side of the valve core body (1); In the axial direction of the valve core body (1), the ratio of the height of the flow channel to the height of the valve core body (1) ranges from 0.5 to 0.

95.

2. The spool according to claim 1, characterized in that, The flow channel includes: A first flow channel (11), the first flow channel (11) extending along the axial direction of the valve core body (1) and forming a first inlet and a first outlet on the outer peripheral side of the valve core body (1); A second flow channel (12), the second flow channel (12) extending along the axial direction of the valve core body (1) and forming a second inlet and a second outlet on the outer peripheral side of the valve core body (1); In the axial direction of the valve core body (1), the ratio of the height of the first flow channel (11) to the height of the valve core body (1) ranges from 0.5 to 0.95, and / or, In the axial direction of the valve core body (1), the ratio of the height of the second flow channel (12) to the height of the valve core body (1) ranges from 0.5 to 0.

95.

3. The spool according to claim 2, characterized in that, In the flow direction of the first flow channel (11), the cross-section of the first flow channel (11) is square, and / or, In the flow direction of the second flow channel (12), the cross-section of the second flow channel (12) is square.

4. The valve core according to claim 2, characterized in that, In the axial direction of the valve core body (1), the first flow channel (11) includes: A first-stage flow channel; A second-stage flow channel; The first-stage flow channel and the second-stage flow channel are sequentially connected between the first inlet and the first outlet and form a first included angle, and the included angle range of the first included angle is 100° - 150°; The second flow channel (12) includes: A third-stage flow channel; A fourth-stage flow channel; The third-stage flow channel and the fourth-stage flow channel are sequentially connected between the second inlet and the second outlet and form a second included angle, and the included angle range of the second included angle is 100° - 150°.

5. The spool according to claim 4, characterized in that, The first flow channel (11) and the second flow channel (12) are symmetrically arranged inside the valve core body (1).

6. The spool valve according to any one of claims 1-5, characterized in that, The volume ratio of the flow channel to the volume of the valve core body (1) ranges from 35% to 60%.

7. The valve core according to any one of claims 1-6, characterized in that, One end of the valve core body (1) has a first conical surface (13) arranged coaxially, and the first conical surface (13) is configured to bear axial and radial clamping forces.

8. The spool according to claim 7, characterized in that, The included angle between the first conical surface (13) and the axial direction of the valve core body (1) ranges from 30° to 60°.

9. The spool according to claim 7, characterized in that, The other end of the valve core body (1) has a second conical surface (14) arranged coaxially, and the second conical surface (14) is configured to bear axial and radial clamping forces; The included angle between the second conical surface (14) and the axial direction of the valve core body (1) ranges from 30° to 60°.

10. The spool valve according to any one of claims 2-5, characterized in that, Both ends of the first flow channel (11) close to the first inlet and the first outlet are provided with port platforms (15), and both sides of the port platforms (15) have arc chamfers (16).

11. The valve core according to any one of claims 1-10, characterized in that, One end of the valve core body (1) is provided with a transmission groove (2), and the transmission groove (2) is used to receive the driving force for driving the valve core to rotate.

12. A four-way valve, characterized in that, Comprising: A valve body (200); A valve seat (300); The valve core (100) according to any one of claims 1-11; A cavity (201) is formed inside the valve body (200), a cylindrical cavity is formed in the valve seat (300), the valve seat (300) is installed in the cavity (201), and the valve core (100) is arranged in the cylindrical cavity.

13. The four-way valve according to claim 12, characterized in that, Further comprising: A seal (400); The valve seat (300) comprises a plurality of sub-valve seats (301), and the plurality of sub-valve seats (301) Surround the circumference of the valve core (100); A groove (302) is provided on one side of the sub-valve seat (301) close to the valve body (200), and the seal (400) is embedded in the groove (302) and abuts against the valve body (200) so that the sub-valve seat (301) fits against the valve core (100).

14. The four-way valve according to claim 13, characterized in that, The valve seat (300) comprises: Four of the sub-valve seats (301), and communication ports (303) are provided on the sub-valve seats (301), and the four communication ports (303) are respectively in corresponding communication with a first inlet, a first outlet, a second inlet and a second outlet.

15. The four-way valve according to any one of claims 13-14, characterized in that, Further comprising: A first gasket (500), a first opening communicating with the cavity (201) is provided on the valve body (200), and the first gasket (500) abuts between the first conical surface (13) and the edge of the first opening.

16. The four-way valve according to any one of claims 13-15, characterized in that, Further comprising: A bottom cover (700), a second opening communicating with the cavity (201) is provided on the valve body (200), and the bottom cover (700) is connected to the second opening and abuts against the second conical surface (14) through a second gasket (800).

17. The four-way valve according to claim 14, characterized in that, Further comprising: A limiting shaft (1000), the side surface of the sub-valve seat (301) close to the adjacent sub-valve seat (301) has an assembly inclined surface (3011) and a limiting surface (3012), an assembly gap is formed between the adjacent assembly inclined surfaces (3011), and the limiting shaft (1000) abuts between the adjacent limiting surfaces (3012).

18. A heat pump system, characterized in that, A four-way valve according to any one of claims 12-17.

19. A vehicle, characterized in that, A heat pump system according to claim 18.

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