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

Abstract

The embodiment of the utility model provides a valve element, a four-way valve, a heat pump system and a vehicle, the valve element comprises a valve element body, the valve element body is cylindrical, a flow channel is formed in the valve element body, the flow channel extends in the axial direction of the valve element body, and an inlet and an outlet are formed in the peripheral side of the valve element body; in the axial direction of the valve element body, the ratio range of the height of the flow channel to the height of the valve element body is 0.5-0.95, so that the flow channel is provided with a larger circulation channel, and the applicability of the valve element is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow control devices, and specifically relates to a valve core, a four-way valve, a heat pump system and a vehicle. Background Art

[0002] The control valve is an indispensable structure in the field of flow control. For example, a four-way valve is a control valve with four valve ports. When the four-way valve is working, the rotating rotor can drive the valve core to rotate in the valve body under the transmission of the transmission mechanism, so as to switch the connection between the four valve ports on the valve body.

[0003] However, the flow passage cross-sectional area 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. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a valve core, a four-way valve, a heat pump system and a vehicle.

[0005] According to a first aspect of the utility model, a valve core is provided, comprising:

[0006] A valve core body, the valve core body is cylindrical, a flow channel is arranged 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;

[0007] 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 the range of 0.5-0.95.

[0008] Optionally, the flow channel includes a first flow channel and a second flow channel, 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;

[0009] 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,

[0010] 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 the range of 0.5-0.95.

[0011] Optionally, in the flow direction of the first flow channel, the cross section of the first flow channel is square, and / or,

[0012] In the flow direction of the second flow channel, the cross section of the second flow channel is square.

[0013] 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, 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;

[0014] The first angle has an angle range of 100-150°, and the second angle has an angle range of 100-150°.

[0015] Optionally, the first flow channel and the second flow channel are symmetrically arranged in the valve core body.

[0016] Optionally, the volume ratio of the flow channel to the volume of the valve core body ranges from 35% to 60%.

[0017] 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.

[0018] Optionally, the angle between the first conical surface and the axial direction of the valve core body ranges from 30° to 60°.

[0019] 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;

[0020] The included angle between the second conical surface and the axial direction of the valve core body ranges from 30° to 60°.

[0021] 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 chamfers.

[0022] 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.

[0023] According to a second aspect of the utility model, a four-way valve is provided, comprising a valve body, a valve seat and the valve core described in the first aspect;

[0024] 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.

[0025] Optionally, a sealing member is further included, the valve seat includes a plurality of sub-valve seats, and the plurality of sub-valve seats surround the circumference of the valve core;

[0026] A groove is provided on one 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.

[0027] 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.

[0028] Optionally, a first gasket is further included, and a first opening communicating with the cavity is provided on the valve body, and the first gasket abuts between the first conical surface and the edge of the first opening.

[0029] Optionally, a bottom cover is further included, the valve body is provided with a second opening communicating with the cavity, the bottom cover is connected to the second opening and abuts against the second conical surface through a second gasket.

[0030] 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 slope and a limiting surface, an assembly gap is formed between adjacent assembly slopes, and the limiting shaft abuts between adjacent limiting surfaces.

[0031] According to a third aspect of the utility model, a heat pump system is provided, wherein the heat pump system comprises the four-way valve described in the second aspect.

[0032] According to a fourth aspect of the utility model, a vehicle is provided, wherein the vehicle comprises the heat pump system according to the third aspect.

[0033] A technical effect of the utility model is:

[0034] An embodiment of 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 first 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.

[0035] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0037] Figure 1 A schematic diagram of the assembly of a valve core provided in an embodiment of the utility model;

[0038] Figure 2 A front view of a valve core provided in an embodiment of the utility model;

[0039] Figure 3 A cross-sectional view (radial direction) of a valve core provided in an embodiment of the utility model;

[0040] Figure 4 A cross-sectional view (axial direction) of a valve core provided in an embodiment of the utility model;

[0041] Figure 5 A partial cross-sectional view (axial direction) of a valve core provided in an embodiment of the utility model;

[0042] Figure 6 for Figure 3 The enlarged view of point A in the middle;

[0043] Figure 7 for Figure 3 The enlarged view of point B in the middle;

[0044] Figure 8 A schematic diagram of the assembly of a valve core and a valve seat provided in an embodiment of the utility model;

[0045] Fig. 9 A schematic diagram of a valve body provided in an embodiment of the utility model;

[0046] Fig.10 A cross-sectional view of a valve body provided in an embodiment of the utility model Figure 1 ;

[0047] Fig.11 A cross-sectional view of a valve body provided in an embodiment of the utility model Figure 2 ;

[0048] Fig.12 A cross-sectional view (radial direction) of a four-way valve when a valve core is in a first state provided by an embodiment of the utility model;

[0049] Fig.13 A cross-sectional view (axial direction) of a four-way valve when a valve core is in a first state provided by an embodiment of the utility model;

[0050] Fig.14 A cross-sectional view (radial direction) of a four-way valve when a valve core is in a second state provided by an embodiment of the utility model;

[0051] Fig.15 A cross-sectional view (axial direction) of a four-way valve when a valve core is in a second state provided by an embodiment of the utility model;

[0052] Fig.16 A schematic diagram of a valve seat provided in an embodiment of the utility model Figure 1 ;

[0053] Fig.17 A schematic diagram of a valve seat provided in an embodiment of the utility model Figure 2 ;

[0054] Fig.18 A cross-sectional view of a valve seat provided in an embodiment of the utility model;

[0055] Fig.19 A schematic diagram of a bottom cover provided by an embodiment of the utility model;

[0056] Fig. 20 A cross-sectional view (radial direction) of a four-way valve provided in an embodiment of the utility model;

[0057] Fig.21 for Fig. 20 Enlarged view of point C in the middle;

[0058] Fig. 22 for Fig. 20 Enlarged view of point D in the middle.

[0059] in:

[0060] 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;

[0061] 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 slope; 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 shaft. DETAILED DESCRIPTION

[0062] Various exemplary embodiments of the present invention 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 invention.

[0063] 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 the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0064] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0065] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0068] Reference Figures 1 to 4, an embodiment of the present application provides a valve core, the valve core comprising:

[0069] A valve core body 1, wherein the valve core body 1 is cylindrical and has a flow channel disposed therein, 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;

[0070] 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 the range of 0.5-0.95.

[0071] Specifically, the valve core body 1 is provided with a first flow channel 11 and a second flow channel 12, 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, and 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;

[0072] 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,

[0073] 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 the range of 0.5-0.95.

[0074] Specifically, the valve core body 1 is configured to be cylindrical, and the axial direction of the valve core body 1 can be Figure 2 Middle Z direction.

[0075] 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° to improve the balance of the medium flow in the valve core.

[0076] When the first flow channel 11 extends along the axial direction of 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 .

[0077] 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 the flow rate of the second flow channel 12 .

[0078] Specifically, see 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.

[0079] 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.

[0080] Compared with a 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, make the flow channel have a larger flow channel, thereby improving the applicability of the valve core.

[0081] The valve core provided in the embodiment of the present application includes a valve core body 1, which is cylindrical, and a first flow channel 11 and a second flow channel 12 are arranged 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, and 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 flow channel, thereby improving the applicability of the valve core.

[0082] Alternatively, see Figure 2 , in the flow direction of the first flow channel 11, the cross section of the first flow channel 11 is square, and / or,

[0083] In the flow direction of the second flow channel 12 , the cross section of the second flow channel 12 is square.

[0084] Specifically, the flow of the first flow channel 11 and the flow of the second flow channel 12 can be radially along the valve core body 1; since the valve core body 1 is set to be cylindrical, the square cross-sections of the first flow channel 11 and the second flow channel 12 can extend along the axial direction of the valve core body 1, making full use of the volume of the valve core body 1. When 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.

[0085] Alternatively, see Figure 4 In the axial direction of the valve core body 1, the first flow channel 11 has a first section of flow channel and a second section of flow channel, the second flow channel 12 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 angle, 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 angle;

[0086] The first angle has an angle range of 100-150°, and the second angle has an angle range of 100-150°.

[0087] Specifically, the first angle may be 110°, 120°, 130° or 140°, and the second angle may be 110°, 120°, 130° or 140°. The first section of the flow channel and the second section of the flow channel can form a V-shaped first flow channel 11 with an obtuse angle, and the third section of the flow channel and the fourth section 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 flow channel 11 and the second flow channel 12 in the valve core body 1, and provide a buffer for the flow of the medium in the first flow channel 11 and the second flow channel 12.

[0088] 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.

[0089] Optionally, the first flow channel 11 and the second flow channel 12 are symmetrically arranged in the valve core body 1 .

[0090] Specifically, see 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, so as to achieve the purpose of flexibly adjusting the flow direction of the medium.

[0091] 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%.

[0092] Specifically, since the valve core body 1 is configured 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 circumferential direction of the valve core body 1 to increase the width of the first flow channel 11 and the second flow channel 12. The volume of the valve core body 1 is fully utilized 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.

[0093] Alternatively, see Figure 3 and Figure 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.

[0094] 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 the valve core body 1 can be positioned radially on the basis of the axial positioning of the valve core body 1.

[0095] It is worth noting that the first conical surface 13 may be the outer surface of a complete cone or the outer surface of a truncated cone.

[0096] Alternatively, see Figure 3 and Figure 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°.

[0097] 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 .

[0098] 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.

[0099] Alternatively, see Figure 3 and Figure 7 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 bear axial and radial clamping forces;

[0100] 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°.

[0101] 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 .

[0102] 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.

[0103] Furthermore, under the action of pressures N1 and N2, the axial force F1z and the axial 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 achieve a sealing effect on the valve core.

[0104] Alternatively, see Figure 5 The first flow channel 11 is provided with a port platform 15 at its ends close to the first inlet and the first outlet, and both sides of the port platform 15 have arc chamfers 16 .

[0105] 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.

[0106] Alternatively, see Figure 3 and Figure 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.

[0107] Specifically, the transmission groove 2 can cooperate with the driving shaft of the external driver of the valve core (not shown in the figure), and the power of the driver is transmitted to the valve core body 1 through the driving shaft to drive the valve core body 1 to rotate clockwise and counterclockwise in the valve seat.

[0108] In one embodiment, the valve core body 1 can rotate 90° clockwise and 90° counterclockwise in the valve seat.

[0109] See also Figure 8 and Fig. 9 , the embodiment of the present application provides a four-way valve, the four-way valve comprises a valve body 200, a valve seat 300 and the valve core 100;

[0110] The valve body 200 forms a cavity 201 inside, the valve seat 300 forms a cylindrical cavity, the valve seat 300 is installed in the cavity 201, and the valve core 100 is disposed in the cylindrical cavity.

[0111] Specifically, the valve core 100 can rotate in the valve seat 300. The valve core 100 includes a valve core body 1, which is cylindrical, and a first flow channel 11 and a second flow channel 12 are arranged 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 flow channel, which improves the applicability of the four-way valve.

[0112] Alternatively, see Figure 8 and Fig. 9 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 ;

[0113] A groove 302 is disposed on one 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 .

[0114] 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%.

[0115] 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, thereby preventing the working medium in the flow channel from leaking outward and ensuring the sealing of the flow channel.

[0116] Alternatively, see Fig.16 and Fig.17 The valve seat 300 includes four sub-valve seats 301 , and a communication port 303 is provided on the sub-valve seat 301 . The four communication ports 303 are respectively connected to the first inlet, the first outlet, the second inlet and the second outlet.

[0117] 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.

[0118] The communication port 303 is respectively connected with the first inlet, the first outlet, the second inlet and the second outlet, so that the flow channel in the valve core can be connected with the outside, thereby ensuring the smoothness of the flow channel.

[0119] Alternatively, see Fig. 20 and Fig.21 , the four-way valve further includes a first gasket 500, 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;

[0120] The first gasket 500 abuts between the first conical surface 13 and the edge of the first opening.

[0121] 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 force, which plays a role in positioning the valve core body 1 so that the valve core body 1 will not deviate during operation.

[0122] 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;

[0123] The upper positioning assembly composed of the first sealing ring 600 and the first gasket 500 is installed in the first cavity 2011 of the valve body 200; the first sealing ring 600 is compressed, and its compression ratio range is 15%-25%. The reaction force generated by the compression of the first gasket 500 makes the first gasket 500 and the valve core body 1 fit tightly, preventing the working medium in the second cavity 2012 from leaking into the first cavity 2011.

[0124] The valve seat assembly composed of four sub-valve seats 301 and corresponding sealing members 400 is installed in the second cavity 2012 of the valve body 200 .

[0125] Alternatively, see Fig.19 and Fig. 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 .

[0126] 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 force on the pressure of the valve core body 1 on the second conical surface 14. This centripetal force plays a role in positioning the valve core body 1 so that the valve core body 1 does not deviate during operation.

[0127] In one embodiment, a second sealing ring 900 is also included. Fig. 22 The 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.

[0128] 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 providing 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 is in the range of 15%-25%. After being compressed, the second sealing ring 900 can seal the internal cavity of the valve body 200 to prevent the working medium from leaking out of the valve body 200.

[0129] In one embodiment, the bottom cover 700 is connected to the valve body 200 by means of locking members such as bolts or pins, and the positioning pin 703 is plugged into and matched with 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.

[0130] Alternatively, see Figure 1 and Fig.12 The four-way valve also includes a limit shaft 1000, and the side of the sub-valve seat 301 close to the adjacent sub-valve seat 301 has an assembly slope 3011 and a limit surface 3012, an assembly gap is formed between adjacent assembly slopes 3011, and the limit shaft 1000 abuts between adjacent limit surfaces 3012.

[0131] 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.

[0132] In one embodiment, see Figures 9 to 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 .

[0133] When the valve core is Fig.13 In the first state shown, the first channel opening 203 is connected to the fourth channel opening 206 through the first flow channel 11, and 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.

[0134] When the valve core is Fig.15 In the second state shown, the valve core has changed relative to Fig.13 When the middle valve core rotates 90°, the first channel port 203 is connected with the second channel port 204 through the first flow channel 11, and the third channel port 205 is connected with the fourth channel port 206 through the second flow channel 12. That is, the path of blocking flow in the four-way valve can be switched by rotating the valve core, thereby improving the flexibility of medium flow in the four-way valve.

[0135] An embodiment of the present application provides a heat pump system, which includes at least one of the four-way valves described above.

[0136] Specifically, the four-way valve is used in a 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 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 flow in the heat pump system.

[0137] Specifically, the working medium may be a refrigerant.

[0138] An embodiment of the present application also provides a vehicle, which includes the heat pump system.

[0139] Although some specific embodiments of the present invention 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 invention. 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 invention. The scope of the present invention is defined by the appended claims.

Claims

1. A valve core, characterized in that: include: A valve core body (1), the valve core body (1) is cylindrical, a flow channel is arranged in the valve core body (1), 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); 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 the range of 0.5-0.

95.

2. The valve core according to claim 1, characterized in that: The flow channel comprises a first flow channel (11) and a second flow channel (12), wherein 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), and 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, 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) is in the range of 0.5-0.

95.

3. The valve core 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) has a first section of the flow channel and a second section of the flow channel, and the second flow channel (12) has a third section of the flow channel and a fourth section of the flow channel, the first section of the flow channel and the second section of the flow channel are sequentially connected between the first inlet and the first outlet and form a first included angle, and the third section of the flow channel and the fourth section of the flow channel are sequentially connected between the second inlet and the second outlet and form a second included angle; The first angle has an angle range of 100-150°, and the second angle has an angle range of 100-150°.

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

6. The valve core according to claim 1, characterized in that: The volume ratio of the flow channel to the valve core body (1) is in the range of 35%-60%.

7. The valve core according to claim 1, characterized in that: 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 bear axial and radial clamping forces.

8. The valve core according to claim 7, characterized in that: The axial angle between the first conical surface (13) and the valve core body (1) is in the range of 30°-60°.

9. The valve core according to claim 7, characterized in that: 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 bear axial and radial clamping forces; The axial angle between the second conical surface (14) and the valve core body (1) is in the range of 30°-60°.

10. The valve core according to claim 2, characterized in that: The ends 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 platform (15) have arc chamfers (16).

11. The valve core according to claim 1, characterized in that: 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.

12. A four-way valve, characterized in that: It comprises a valve body (200), a valve seat (300) and a valve core (100) according to any one of claims 1 to 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: It also includes a sealing member (400), wherein 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); A groove (302) is provided on one side of the sub-valve seat (301) close to the valve body (200), and 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).

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

15. The four-way valve according to claim 13, characterized in that: It also includes a first gasket (500), the valve body (200) is provided with a first opening communicating with the cavity (201), and the first gasket (500) is abutted between the first conical surface (13) and the edge of the first opening.

16. The four-way valve according to claim 13, characterized in that: It also 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) via a second gasket (800).

17. The four-way valve according to claim 14, characterized in that: It 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 inclined surface (3011) and a limiting surface (3012), an assembly gap is formed between adjacent assembly inclined surfaces (3011), and the limiting shaft (1000) abuts between adjacent limiting surfaces (3012).

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

19. A vehicle, characterized in that: A heat pump system comprising the heat pump system of claim 18.

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