Switching valve, thermal management system and vehicle

Abstract

Disclosed is a switching valve, comprising a valve body (10), a valve core (2) and a plurality of valve seat assemblies (3). An accommodating cavity (11) is provided inside the valve body (10), the valve core (2) being rotatably accommodated in the accommodating cavity (11). The plurality of valve seat assemblies (3) are all mounted on the valve body (10) and are attached to the outer surface of the valve core (2), the plurality of valve seat assemblies (3) comprising a first valve seat assembly (42) and a second valve seat assembly (43). The valve body (10) is provided with a first mounting hole (14) and a second mounting hole (15) both leading to the accommodating cavity (11), the first valve seat assembly (42) being in threaded connection with the first mounting hole (14), and the second valve seat assembly (43) being in threaded connection with the second mounting hole (15). The requirement for the machining precision of at least one of the valve seat assemblies, the valve body and the valve core can be lowered, so as to reduce the machining cost of the switching valve. The distance positions of the first valve seat assembly and the second valve seat assembly with respect to the valve core are adjusted, so as to attach the valve seat assemblies to the outer surface of the valve core, eliminating gaps at contact positions of the valve seat assemblies and the valve core. Further disclosed are a thermal management system using the switching valve, and a vehicle.

Description

Switching valve, thermal management system and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on December 13, 2023, with application number 202311719295.3 and titled “Switching Valve, Thermal Management System and Vehicle,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the technical field of switching valves, and in particular, to a switching valve, a thermal management system, and a vehicle. Background Art

[0004] A switching valve is a control valve used to control the flow pattern and direction of a fluid, enabling fluid flow, shutoff, and reversal. A switching valve typically includes a valve body with a housing chamber and a valve core rotatably disposed within the chamber. Rotation of the valve core selectively connects the valve core flow channel within the valve core to a fluid pipeline connected to the switching valve. A valve seat assembly is typically also provided within the housing chamber of the valve body, sealingly contacting the valve core. To prevent fluid leakage from the contact point between the valve seat assembly and the valve core, the valve seat assembly must fit tightly against the outer surface of the valve core.

[0005] In related technologies, in order to ensure that the valve seat assembly fits tightly against the outer surface of the valve core, higher processing accuracy requirements are imposed on at least one of the valve seat assembly, the valve core, and the valve body, resulting in greater difficulty and higher processing costs for the switching valve.

[0006] Summary of the Invention

[0007] The purpose of the present disclosure is to provide a switching valve, a thermal management system, and a vehicle to solve the problems existing in the related art.

[0008] In order to achieve the above objectives, according to a first aspect of the present disclosure, a switching valve is provided, comprising:

[0009] A valve body having an accommodating cavity provided therein;

[0010] a valve core rotatably accommodated in the accommodating cavity;

[0011] A plurality of valve seat assemblies, each mounted on the valve body and fitted with the outer surface of the valve core;

[0012] Among them, the multiple valve seat assemblies include a first valve seat assembly and a second valve seat assembly, and the valve body is provided with a first mounting hole and a second mounting hole both connected to the accommodating cavity, the first valve seat assembly is threadedly connected to the first mounting hole, and the second valve seat assembly is threadedly connected to the second mounting hole.

[0013] Optionally, the axis of the first mounting hole and the axis of the second mounting hole are arranged to intersect.

[0014] Optionally, the first valve seat assembly includes a first mounting seat and a first valve core seal mounted on the first mounting seat, a first external thread is formed on at least a portion of an outer surface of the first mounting seat, and a first internal thread that cooperates with the first external thread is formed on at least a portion of a hole wall of the first mounting hole;

[0015] The second valve seat assembly includes a second mounting seat and a second valve core seal mounted on the second mounting seat, a second external thread is formed on at least part of the outer surface of the second mounting seat, and a second internal thread that cooperates with the second external thread is formed on at least part of the hole wall of the second mounting hole.

[0016] Optionally, the multiple valve seat assemblies also include a third valve seat assembly and a fourth valve seat assembly, and the valve body is also provided with a third mounting hole and a fourth mounting hole, both of which are connected to the accommodating cavity. The third valve seat assembly is fixed to the third mounting hole, and the fourth valve seat assembly is fixed to the fourth mounting hole.

[0017] Optionally, the axis of the third mounting hole is arranged to intersect with the axis of the fourth mounting hole.

[0018] Optionally, the axis of the first mounting hole is perpendicular to the axis of the second mounting hole, the axis of the third mounting hole is perpendicular to the axis of the fourth mounting hole, the first valve seat assembly is opposite to the third valve seat assembly, and the second valve seat assembly is opposite to the fourth valve seat assembly.

[0019] Optionally, the third valve seat assembly includes a third mounting seat and a third valve core seal mounted on the third mounting seat, and the third mounting seat is fixed to the third mounting hole;

[0020] The fourth valve seat assembly includes a fourth mounting seat and a fourth valve core seal mounted on the fourth mounting seat, and the fourth mounting seat is fixed to the fourth mounting hole.

[0021] Optionally, at least one valve core flow channel penetrating the valve core is formed in the valve core, a third flow channel is formed on the third valve core seal, and a fourth flow channel is formed on the fourth valve core seal, and both the third flow channel and the fourth flow channel can be communicated with the valve core flow channel;

[0022] A first valve body flow channel and a second valve body flow channel are also formed on the valve body, the first flow channel opening of the first valve body flow channel is connected to the third flow channel, the first flow channel opening of the second valve body flow channel is connected to the fourth flow channel, and the second flow channel opening of the first valve body flow channel and the second flow channel opening of the second valve body flow channel are located on the same side of the valve body.

[0023] Optionally, the first valve body flow channel includes a first section and a second section, the central axis of the first section is parallel to the central axis of the third through-flow channel, the first end of the first section is connected to the third through-flow channel, and the second end of the first section intersects and connects with the first end of the second section;

[0024] The central axis of the second segment is arranged at an angle to the central axis of the first segment, and the central axis of the first segment and the central axis of the second segment are both straight lines.

[0025] Optionally, the second end of the first segment protrudes from the second segment toward the outside of the second segment.

[0026] Optionally, at least one valve core flow channel penetrating the valve core is formed in the valve core, each of the valve seat assemblies includes a valve core seal, and a flow channel is provided on the valve core seal, and the flow channel can be communicated with the valve core flow channel.

[0027] Optionally, part of the valve core is located in the through-flow channel, and a channel wall of the through-flow channel is configured to be able to form linear contact with an outer surface of the valve core.

[0028] Optionally, the flow channel includes a conical channel section, part of the valve core is located in the conical channel section, and the area of ​​the radial cross-section of the conical channel section gradually increases along the direction from the end of the conical channel section away from the valve core to the end of the conical channel section close to the valve core, so that the channel wall of the conical channel section can form a linear contact with the outer surface of the valve core.

[0029] Optionally, the valve core flow channel includes a first flow channel section and a second flow channel section, the first flow channel section and the second flow channel section intersect and are connected to each other, the central axis of the first flow channel section is a straight line, the central axis of the second flow channel section is a straight line, and the angle between the central axis of the first flow channel section and the central axis of the second flow channel section is an obtuse angle.

[0030] Optionally, an angle between a central axis of the first flow channel segment and a central axis of the second flow channel segment is 108° to 120°.

[0031] Optionally, the ratio of the volume of the valve core flow channel to the volume of the valve core is 0.21 to 0.28.

[0032] Optionally, there are multiple valve core flow channels, and the multiple valve core flow channels include a first valve core flow channel and a second valve core flow channel, and the first valve core flow channel and the second valve core flow channel are respectively located on both sides of the longitudinal center plane of the valve core.

[0033] Optionally, a positioning protrusion is provided on one of the valve core and the valve body, and a positioning groove is provided on the other of the valve core and the valve body, the positioning protrusion can extend into the positioning groove, and the cross-sectional area of ​​the positioning protrusion is smaller than the cross-sectional area of ​​the positioning groove;

[0034] The switching valve also includes a valve core base, which is located in the accommodating cavity and connected to the valve body. The valve core base is supported on the bottom of the valve core and allows a gap to exist between the outer surface of the positioning protrusion and the groove wall of the positioning groove.

[0035] Optionally, the valve core base has a supporting portion in contact with the valve core, and the supporting portion is configured to be able to form linear contact with the outer surface of the valve core.

[0036] Optionally, the support portion has a tapered surface, and an area of ​​a radial cross section of the tapered surface gradually increases along a direction from an end of the support portion away from the valve core to an end of the support portion close to the valve core.

[0037] Optionally, the positioning groove includes a main body section and a gradually expanding section, the cross-sectional area of ​​the positioning protrusion is smaller than the cross-sectional area of ​​the main body section, and the cross-sectional area of ​​the gradually expanding section gradually increases along the direction from one end of the gradually expanding section close to the main body section to the end of the gradually expanding section away from the main body section.

[0038] Optionally, a mounting groove communicating with the accommodating cavity is provided on the valve body, an insertion portion is provided on the valve core base, the insertion portion is inserted into the mounting groove, and the positioning protrusion passes through the valve core base and extends into the positioning groove.

[0039] Optionally, the switching valve further comprises a valve cover assembly, the valve cover assembly comprising a valve cover body, a valve cover mounting hole communicating with the accommodating cavity being formed on the valve body, the valve cover mounting hole being configured to allow the valve core to pass through, and the valve cover body being mounted in the valve cover mounting hole;

[0040] The switching valve further includes a driving rod, a first through hole is formed on the valve cover body, and the driving rod passes through the first through hole and is connected to the valve core;

[0041] Part of the valve core is located in the first through hole.

[0042] Optionally, the valve cover assembly further includes a pressure cover, which is mounted on a side of the valve cover body away from the accommodating cavity, and a second through hole is formed on the pressure cover for the drive rod to pass through, and the radial cross-sectional area of ​​the second through hole is smaller than the radial cross-sectional area of ​​the first through hole.

[0043] According to a second aspect of the present disclosure, a thermal management system is provided, comprising the above-mentioned switching valve.

[0044] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned thermal management system.

[0045] Because the first mounting hole is connected to the accommodating cavity and the first valve seat assembly is threadedly connected to the first mounting hole, when installing the first valve seat assembly, the first valve seat assembly can be rotated to move the first valve seat assembly axially along the first mounting hole, thereby moving the first valve seat assembly closer to or farther away from the valve core. This not only adjusts the position of the valve core within the valve body, but also facilitates adjusting the first valve seat assembly to a state where it can fit the outer surface of the valve core. Similarly, because the second mounting hole is connected to the accommodating cavity and the second valve seat assembly is threadedly connected to the second mounting hole, when installing the second valve seat assembly, the second valve seat assembly can be rotated to move the second valve seat assembly axially along the second mounting hole, thereby moving the second valve seat assembly closer to or farther away from the valve core. This not only adjusts the position of the valve core within the valve body, but also facilitates adjusting the second valve seat assembly to a state where it can fit the outer surface of the valve core.

[0046] That is to say, by adjusting the installation position of the first valve seat assembly and the second valve seat assembly on the valve body, the position of the valve core in the valve body and the distance between the first valve seat assembly and the second valve seat assembly and the valve core can be adjusted, thereby ensuring that the first valve seat assembly and the second valve seat assembly can fit with the outer surface of the valve core during the assembly process, thereby reducing the processing accuracy requirements for at least one of the valve seat assembly, valve body, and valve core, and reducing the processing cost of the switching valve.

[0047] In addition, with the use of the switching valve, the contact positions of the first valve seat assembly and the second valve seat assembly with the valve core may be worn, resulting in a poor seal at the contact positions of the valve seat assembly and the valve core. In this case, the distance between the first valve seat assembly and the second valve seat assembly and the valve core can be adjusted to fit the outer surface of the valve core, thereby eliminating the gap between the contact positions of the valve seat assembly and the valve core.

[0048] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0050] FIG1 is a schematic diagram of the three-dimensional structure of a switching valve provided in one embodiment of the present disclosure.

[0051] FIG2 is a side schematic diagram of a switching valve provided in one embodiment of the present disclosure.

[0052] FIG3 is a schematic cross-sectional view along line AA in FIG2 .

[0053] FIG4 is a partial enlarged schematic diagram of point C in FIG3 .

[0054] FIG5 is a bottom view schematic diagram of a switching valve provided in one embodiment of the present disclosure.

[0055] FIG6 is a schematic cross-sectional view along line BB in FIG5 .

[0056] FIG. 7 is a partial enlarged schematic diagram of point D in FIG. 6 .

[0057] FIG8 is a partial enlarged schematic diagram of point E in FIG6 .

[0058] FIG9 is a schematic diagram of the three-dimensional structure of the valve core base of the switching valve provided in one embodiment of the present disclosure.

[0059] FIG10 is a schematic diagram of the three-dimensional structure of a valve core provided in one embodiment of the present disclosure.

[0060] FIG11 is a schematic cross-sectional view of a valve core provided in one embodiment of the present disclosure.

[0061] FIG12 is a partial enlarged schematic diagram of point F in FIG11 .

[0062] FIG13 is a partial enlarged schematic diagram of point G in FIG11 .

[0063] FIG14 is a schematic diagram of the three-dimensional structure of a valve core provided in another embodiment of the present disclosure.

[0064] FIG15 is a schematic cross-sectional view of a valve core provided in another embodiment of the present disclosure.

[0065] FIG16 is a partial enlarged schematic diagram of point H in FIG15 .

[0066] FIG17 is a partially enlarged schematic diagram of point I in FIG11 .

[0067] FIG18 is a schematic diagram of the three-dimensional structure of a valve seat assembly provided in one embodiment of the present disclosure.

[0068] FIG19 is a schematic cross-sectional view of a valve seat assembly provided in accordance with an embodiment of the present disclosure.

[0069] FIG20 is a schematic diagram of the three-dimensional structure of a valve seat assembly provided in another embodiment of the present disclosure.

[0070] FIG21 is a schematic cross-sectional view of a valve seat assembly provided in another embodiment of the present disclosure.

[0071] FIG22 is a partially enlarged schematic diagram of point J in FIG21 .

[0072] FIG23 is a schematic structural block diagram of a thermal management system provided in one embodiment of the present disclosure.

[0073] FIG24 is a schematic structural block diagram of a vehicle provided in accordance with an embodiment of the present disclosure. DETAILED DESCRIPTION

[0074] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0075] In the present disclosure, unless otherwise specified, directional words such as "upper (top), lower (bottom)" are generally defined with respect to the drawing direction of the corresponding accompanying drawings, as shown in Figure 6, while "inside" and "outside" refer to the inside and outside of the corresponding component contour. In addition, the terms "first", "second", etc. are used to distinguish one element from another and do not have sequentiality or importance.

[0076] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections, and may be directly connected or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0077] As shown in Figures 1 to 24, the present disclosure provides a switching valve 1, including a valve body 10, a valve core 2 and a valve seat assembly 3. The valve body 10 is provided with an accommodating chamber 11 inside, and the valve core 2 is rotatably accommodated in the accommodating chamber 11. The valve seat assembly 3 is mounted on the valve body 10 and fits with the outer surface of the valve core 2. By rotating the valve core 2, the valve core flow channel 22 in the valve core 2 and the fluid pipeline connected to the switching valve 1 can be connected or cut off. The switching valve 1 provided in the present disclosure can be a reversing valve such as a three-way valve, a four-way valve, or a five-way valve. The present disclosure does not limit the specific type of the switching valve 1.

[0078] To facilitate understanding of the switching valve 1 provided by the present disclosure, the overall structure of the switching valve 1 will be first introduced below, and then the valve core 2, valve core seal 40, and valve seat assembly 3 in the switching valve 1 will be described in detail.

[0079] Switching valve 1

[0080] As shown in Figures 3, 4, 6 and 18 to 22, the switching valve 1 provided in the present disclosure includes a plurality of valve seat assemblies 3, and the plurality of valve seat assemblies 3 are all installed on the valve body 10 and fit with the outer surface of the valve core 2, wherein the plurality of valve seat assemblies 3 include at least one first valve seat assembly 42 (as shown in Figure 3), and a first mounting hole 14 communicating with the accommodating cavity 11 is provided on the valve body 10, and a valve seat assembly 42 is threadedly connected to the first mounting hole 14.

[0081] Since the first mounting hole 14 is connected to the accommodating cavity 11, and the first valve seat assembly 42 is threadedly connected to the first mounting hole 14, when installing the first valve seat assembly 42, the first valve seat assembly 42 can be rotated to move the first valve seat assembly 42 along the axial direction of the first mounting hole 14, so that the first valve seat assembly 42 is close to or away from the valve core 2. On the one hand, the position of the valve core 2 in the valve body 10 can be adjusted, and on the other hand, it is convenient to adjust the first valve seat assembly 42 to a state where it can fit with the outer surface of the valve core 2.

[0082] The multiple valve seat assemblies 3 may further include at least one second valve seat assembly 43 (as shown in FIG3 ). The valve body 10 is provided with a second mounting hole 15 communicating with the accommodating cavity 11 , and the second valve seat assembly 43 is threadedly connected to the second mounting hole 15 .

[0083] Similarly, since the second mounting hole 15 is connected to the accommodating cavity 11 and the second valve seat assembly 43 is threadedly connected to the second mounting hole 15, when installing the second valve seat assembly 43, the second valve seat assembly 43 can be rotated to move the second valve seat assembly 43 along the axial direction of the second mounting hole 15, so that the second valve seat assembly 43 is close to or away from the valve core 2. On the one hand, the position of the valve core 2 in the valve body 10 is adjusted, and on the other hand, the second valve seat assembly 43 is adjusted to a state where it can fit the outer surface of the valve core 2.

[0084] That is to say, by adjusting the installation position of the first valve seat assembly 42 and / or the second valve seat assembly 43 on the valve body 10, the position of the valve core 2 in the valve body 10 and the distance between the first valve seat assembly 42 and / or the second valve seat assembly 43 and the valve core 2 can be adjusted, thereby ensuring that the first valve seat assembly 42 and / or the second valve seat assembly 43 can fit with the outer surface of the valve core 2 during the assembly process, thereby reducing the requirements for the processing accuracy of at least one of the valve seat assembly 3, the valve body 10, and the valve core 2, and reducing the processing cost of the switching valve 1.

[0085] In addition, as the switching valve 1 is used, the contact position between the first valve seat assembly 42 and / or the second valve seat assembly 43 and the valve core 2 may be worn, resulting in a poor seal between the contact position between the valve seat assembly 3 and the valve core 2. In this case, the distance between the first valve seat assembly 42 and / or the second valve seat assembly 43 and the valve core 2 can be adjusted, and the valve seat assembly 3 can be adjusted to fit the outer surface of the valve core 2 to eliminate the gap between the contact position between the valve seat assembly 3 and the valve core 2.

[0086] It is understood that the threaded connection between the first valve seat assembly 42 and the first mounting hole 14 has a self-locking capability, that is, the first valve seat assembly 42 will not move axially along the first mounting hole 14 when pressed by the valve core 2, and the threaded connection between the second valve seat assembly 43 and the second mounting hole 15 has a self-locking capability, that is, the second valve seat assembly 43 will not move axially along the second mounting hole 15 when pressed by the valve core 2. In addition, the number of the first valve seat assembly 42, the second valve seat assembly 43, the first mounting hole 14, and the second mounting hole 15 can be designed according to actual needs and can be one or more, and this disclosure is not limited to this.

[0087] For an embodiment in which the valve seat assembly 3 includes a first valve seat assembly 42 and a second valve seat assembly 43, as an implementation method, as shown in FIG3 , the axis of the first mounting hole 14 can be arranged to intersect with the axis of the second mounting hole 15, that is, the axis of the first mounting hole 14 can be non-parallel to the axis of the second mounting hole 15. In this way, the first valve seat assembly 42 and the second valve seat assembly 43 can abut against the valve core 2 from the intersecting directions, and the position of the valve core 2 in the accommodating cavity 11 can be adjusted in the intersecting directions. For example, adjusting the valve core 2 to the center of the accommodating cavity 11 can reduce the eccentric wear of the valve core 2 on the valve seat assembly 3, which is conducive to the sealing contact between the valve core 2 and the valve seat assembly 3.

[0088] In other embodiments, the axis of the first mounting hole 14 and the axis of the second mounting hole 15 may also be arranged parallel to each other.

[0089] To achieve threaded connection between the first valve seat assembly 42 and the first mounting hole 14 and sealed contact with the valve body 10, and threaded connection between the second valve seat assembly 43 and the second mounting hole 15 and sealed contact with the valve body 10, as one embodiment, as shown in FIG3 , the first valve seat assembly 42 includes a first mounting seat 421 and a first valve core seal 412 mounted on the first mounting seat 421. A first external thread 4211 is formed on at least a portion of the outer surface of the first mounting seat 421, and a first internal thread 141 that mates with the first external thread 4211 is formed on at least a portion of the wall of the first mounting hole 14. The second valve seat assembly 43 includes a second mounting seat 431 and a second valve core seal 413 mounted on the second mounting seat 431. A second external thread 4311 is formed on at least a portion of the outer surface of the second mounting seat 431, and a second internal thread 151 that mates with the second external thread 4311 is formed on at least a portion of the wall of the second mounting hole 15.

[0090] By threading the first mounting seat 421 into the first mounting hole 14, the first valve core seal 412 mounted on the first mounting seat 421 can be movably mounted on the valve body 10 along the axial direction of the first mounting hole 14. Similarly, by threading the second mounting seat 431 into the second mounting hole 15, the second valve core seal 413 mounted on the second mounting seat 431 can be movably mounted on the valve body 10 along the axial direction of the first mounting hole 14.

[0091] The first valve seat assembly 42 is in sealing contact with the valve core 2 via the first valve core seal 412, which helps improve the sealing effect on the valve core 2. The first valve core seal 412 is also easily replaced after it is worn. Similarly, the second valve seat assembly 43 is in sealing contact with the valve core 2 via the first valve core seal 412, which helps improve the sealing effect on the valve core 2. The second valve core seal 413 is also easily replaced after it is worn.

[0092] As shown in Figure 3, the multiple valve seat assemblies 3 can also include a third valve seat assembly 44 and a fourth valve seat assembly 45. The valve body 10 is also provided with a third mounting hole 16 and a fourth mounting hole 17, both of which are connected to the accommodating cavity 11. The third valve seat assembly 44 is fixed to the third mounting hole 16, and the fourth valve seat assembly 45 is fixed to the fourth mounting hole 17.

[0093] In other words, a part of the multiple valve seat assemblies 3 (i.e., the first valve seat assembly 42 and the second valve seat assembly 43) can be threadedly connected to the valve body 10, while another part of the valve seat assemblies (i.e., the third valve seat assembly 44 and the fourth valve seat assembly 45) can be fixed to the valve body 10. The position of the valve core 2 can be adjusted by using the part of the valve seat assembly 3 threadedly connected to the valve body 10 so that it can be in sealing contact with multiple valve seat assemblies 3. This arrangement further reduces the manufacturing cost of the switching valve 1.

[0094] Here, the number of the third valve seat assembly 44, the third mounting hole 16, the fourth valve seat assembly 45 and the fourth mounting hole 17 can be designed according to actual needs, and can be one or more, which is not limited in this disclosure.

[0095] The present disclosure does not limit the specific positions of the third mounting hole 16 and the fourth mounting hole 17. As an embodiment, as shown in FIG3 , the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 may intersect, that is, the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 may not be parallel. As another embodiment, the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 may also be parallel to each other.

[0096] Alternatively, as shown in FIG3 , the axis of the first mounting hole 14 and the axis of the second mounting hole 15 may be perpendicular to each other, and the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 may be perpendicular to each other. The first valve seat assembly 42 is opposite to the third valve seat assembly 44, and the second valve seat assembly 43 is opposite to the fourth valve seat assembly 45. Since the first valve seat assembly 42 and the third valve seat assembly 44 are opposite to each other, the valve core 2 can be pressed against the third valve seat assembly 44 fixed to the valve body 10 by adjusting the first valve seat assembly 42, thereby ensuring that the first valve seat assembly 42 and the third valve seat assembly 44 are both in sealing contact with the valve core 2. Since the second valve seat assembly 43 and the fourth valve seat assembly 45 are opposite to each other, the valve core 2 can be pressed against the fourth valve seat assembly 45 fixed to the valve body 10 by adjusting the second valve seat assembly 43. Thus, by adjusting the positions of the first valve seat assembly 42 and the second valve seat assembly 43, the valve core 2 is in sealing contact with the first valve seat assembly 42, the second valve seat assembly 43, the third valve seat assembly 44, and the fourth valve seat assembly 45.

[0097] In addition, the axis of the first mounting hole 14 is perpendicular to the axis of the second mounting hole 15, and the axis of the third mounting hole 16 is perpendicular to the axis of the fourth mounting hole 17. The valve core 2 can also be adjusted to the center of the accommodating cavity 11 by adjusting the first valve seat assembly 42 and the second valve seat assembly 43.

[0098] In order to achieve the fixation of the third valve seat assembly 44 and the third mounting hole 16 and the sealing contact with the valve body 10, and to achieve the fixation of the fourth valve seat assembly 45 and the third mounting hole 16 and the sealing contact with the valve body 10, as an embodiment, as shown in Figure 3, the third valve seat assembly 44 includes a third mounting seat 441 and a third valve core seal 414 installed on the third mounting seat 441, and the third mounting seat 441 is fixed to the third mounting hole 16, and the fourth valve seat assembly 45 includes a fourth mounting seat 451 and a fourth valve core seal 415 installed on the fourth mounting seat 451, and the fourth mounting seat 451 is fixed to the fourth mounting hole 17.

[0099] The third valve core seal 414 can be mounted on the valve body 10 via a third mounting seat 441. The third valve seat assembly 44 seals against the valve core 2 via the third valve core seal 414, thereby improving the sealing effect on the valve core 2 and facilitating replacement of the third valve core seal 414 after wear. Similarly, the fourth valve core seal 415 can be mounted on the valve body 10 via a fourth mounting seat 451. The fourth valve seat assembly 45 seals against the valve core 2 via the fourth valve core seal 415, thereby improving the sealing effect on the valve core 2 and facilitating replacement of the fourth valve core seal 415 after wear.

[0100] Optionally, as shown in Figures 3, 4 and 6, at least one valve core flow channel 22 is formed in the valve core 2, passing through the valve core 2, and each valve seat assembly 3 includes a valve core seal 40. A flow channel 411 is provided on the valve core seal 40, and the flow channel 411 can be communicated with the valve core flow channel 22, so that the fluid pipeline connected to the switching valve 1 can communicate with the valve core flow channel 22 through the flow channel 411.

[0101] As an exemplary embodiment provided by the present disclosure, as shown in Figure 3, a first flow channel 4113 is formed on the first valve core seal 412, and a second flow channel 4114 is formed on the second valve core seal 413. Both the first flow channel 4113 and the second flow channel 4114 can be communicated with the valve core flow channel 22. A first fluid channel 481 is also formed on the first mounting seat 421, and a first end of the first fluid channel 481 is communicated with the first flow channel 4113. A second fluid channel 482 is also formed on the second mounting seat 431, and a first end of the second fluid channel 482 is communicated with the second flow channel 4114. The second end of the first fluid channel 481 and the second end of the second fluid channel 482 are used to communicate with different fluid pipelines outside the switching valve 1.

[0102] A third flow channel 4115 is formed on the third valve core seal 414, and a fourth flow channel 4116 is formed on the fourth valve core seal 415. Both the third flow channel 4115 and the fourth flow channel 4116 can be communicated with the valve core flow channel 22. A first valve body flow channel 18 and a second valve body flow channel 19 are also formed on the valve body 10. The first flow channel opening 183 of the first valve body flow channel is communicated with the third flow channel 4115, and the first flow channel opening 191 of the second valve body flow channel is communicated with the fourth flow channel 4116. The first valve body flow channel 18 and the second valve body flow channel 19 are used to communicate with different fluid pipelines outside the switching valve 1.

[0103] As shown in Figure 3, through the rotation of the valve core 2, the two ends of the valve core flow channel 22 can be connected to the first flow channel 4113 and the second flow channel 4114 respectively, or the two ends of the valve core flow channel 22 can be connected to the third flow channel 4115 and the fourth flow channel 4116 respectively, or the two ends of the valve core flow channel 22 can be connected to the first flow channel 4113 and the fourth flow channel 4116 respectively, or the two ends of the valve core flow channel 22 can be connected to the third flow channel 4115 and the second flow channel 4114 respectively.

[0104] Optionally, as shown in FIG3 , the second flow channel opening 184 of the first valve body flow channel and the second flow channel opening 192 of the second valve body flow channel are located on the same side of the valve body 10. This allows a worker to connect the second flow channel opening 184 of the first valve body flow channel and the second flow channel opening 192 of the second valve body flow channel to different external pipelines without rotating the valve body 10, thereby facilitating the connection of external pipelines to the switching valve 1. Furthermore, for applications in which the switching valve 1 is applied to a thermal management system 91 of a vehicle 90, the location of the second flow channel opening 184 of the first valve body flow channel and the second flow channel opening 192 of the second valve body flow channel on the same side of the valve body 10 also facilitates installation of the switching valve 1 within the limited installation space of the vehicle 90.

[0105] In order to achieve that the second flow channel opening 184 of the first valve body flow channel and the second flow channel opening 192 of the second valve body flow channel are located on the same side of the valve body 10, as an embodiment, as shown in Figure 3, the first valve body flow channel 18 includes a first section 181 and a second section 182, the central axis of the first section 181 is parallel to the central axis of the third flow channel 4115, and the first end of the first section 181 is connected to the third flow channel 4115, the second end of the first section 181 intersects and is connected to the first end of the second section 182, the central axis of the second section 182 is set at an angle to the central axis of the first section 181 (that is, the central axis of the second section 182 is not parallel to the central axis of the first section 181), and the central axis of the first section 181 and the central axis of the second section 182 are both straight lines.

[0106] In this way, the second end of the second section 182 and the second flow channel opening 192 of the second valve body flow channel can be located on the same side of the valve body 10, that is, the second flow channel opening 184 of the first valve body flow channel and the second flow channel opening 192 of the second valve body flow channel can be located on the same side of the valve body 10.

[0107] Since the first section 181 and the second section 182 are set at an angle, it is difficult for conventional punching tools (such as cylindrical drill bits) to penetrate the second section 182 to process the first section 181. Therefore, optionally, as shown in Figure 3, the first valve seat assembly 42 can be opposite to the third valve seat assembly 44, that is, the first mounting hole 14 can be opposite to the first section 181, so that conventional punching tools can penetrate the first mounting hole 14 and the accommodating cavity 11 to process the first section 181.

[0108] In order to ensure sufficient flow area at the connection between the first section 181 and the second section 182, as an embodiment, as shown in FIG3 , the second end of the first section 181 protrudes from the second section 182 toward the outside of the second section 182. When processing the first section 181, the second end of the first section 181 can be processed so as to protrude from the second section 182. This ensures sufficient flow area at the connection between the first section 181 and the second section 182, and also creates a larger space at the inflection point of the first valve body flow channel 18 (i.e., the intersection of the first section 181 and the second section 182), thereby reducing the flow resistance of the fluid at the inflection point of the first valve body flow channel 18.

[0109] Furthermore, in order to reduce the resistance of the valve core seal 40 during the rotation of the valve core 2, as an embodiment, part of the valve core 2 is located within the flow channel 411, and the channel wall of the flow channel 411 is configured to be in line contact with the outer surface of the valve core 2. By having the channel wall of the flow channel 411 in line contact with the outer surface of the valve core 2, on the one hand, the gap at the connection between the valve core flow channel 22 in the valve core 2 and the flow channel 411 in the valve core seal 40 can be sealed, and on the other hand, a smaller contact area can be created between the valve core seal 40 and the valve core 2, thereby reducing the resistance of the valve core seal 40 during the rotation of the valve core 2, reducing the influence of the valve core seal 40 on the rotation of the valve core 2, and improving the switching speed of the switching valve 1.

[0110] The present disclosure does not limit the specific structure of the above-mentioned flow channel 411. As an embodiment, as shown in Figures 19 to 21, the flow channel 411 includes a conical channel section 4111, and part of the valve core 2 is located in the conical channel section 4111. Along the direction from the end of the conical channel section 4111 away from the valve core 2 to the end of the conical channel section 4111 close to the valve core 2, the area of ​​the radial cross-section of the conical channel section 4111 gradually increases, so that the channel wall of the conical channel section 4111 can form a linear contact with the outer surface of the valve core 2.

[0111] Along the axial direction of the conical channel section 4111, any position of the channel wall of the conical channel section 4111 can be used to form linear contact with the outer surface of the valve core 2. Therefore, the requirements for the manufacturing accuracy of the valve core seal 40 and the valve core 2 can be reduced, thereby reducing the processing and manufacturing costs.

[0112] As another embodiment, the flow channel 411 may also include a trumpet-shaped channel section, for example, the two sides of the axial cross-section of the trumpet-shaped channel section are arc-shaped, part of the valve core 2 is located in the trumpet-shaped channel section, and the area of ​​the radial cross-section of the trumpet-shaped channel section gradually increases along the direction from the end of the trumpet-shaped channel section away from the valve core 2 to the end of the trumpet-shaped channel section close to the valve core 2, so that the channel wall of the trumpet-shaped channel section can form a linear contact with the outer surface of the valve core 2.

[0113] Optionally, as shown in Figures 11 and 15, the valve core flow channel 22 includes a first flow channel section 221 and a second flow channel section 222, the first flow channel section 221 and the second flow channel section 222 intersect and are connected to each other, the central axis of the first flow channel section 221 is a straight line, and the central axis of the second flow channel section 222 is a straight line.

[0114] Since the valve core flow channel 22 in the valve core 2 includes a first flow channel section 221 and a second flow channel section 222, and the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 are both straight lines, it is possible to facilitate the processing of the valve core flow channel 22. For example, a punching tool (e.g., a cylindrical drill bit) can be used to punch holes along a straight line on the core body 20 to respectively process the first flow channel section 221 and the second flow channel section 222, and the first flow channel section 221 and the second flow channel section 222 are made to intersect and communicate with each other, thereby forming the valve core flow channel 22 that runs through the core body 20 through the first flow channel section 221 and the second flow channel section 222. The valve core flow channel 22 in the valve core 2 provided by the present disclosure is easy to process, which is conducive to reducing the production cost of the valve core 2.

[0115] Optionally, the angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 is an obtuse angle.

[0116] In addition, since the angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 is an obtuse angle, the flow resistance of the fluid in the valve core flow channel 22 can be reduced, which is beneficial to improving the performance of the switching valve 1.

[0117] The angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 can be constructed as any suitable angle. As an embodiment, the angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 is 108° to 120°, so that the valve core flow channel 22 has a smaller flow resistance to the fluid.

[0118] The volume of the valve core flow channel 22 and the volume of the core body 20 disclosed in the present invention can be constructed into any suitable ratio, and the present disclosure does not limit this. As an embodiment, the ratio of the volume of the valve core flow channel 22 to the volume of the valve core 2 is 0.21~0.28, so that the valve core flow channel 22 can have a larger flow area.

[0119] Alternatively, as shown in Figures 11 and 15 , there may be multiple valve core flow channels 22, including a first valve core flow channel 223 and a second valve core flow channel 224, wherein the first valve core flow channel 223 and the second valve core flow channel 224 are respectively located on either side of the longitudinal center plane 80 of the valve core 2. Here, the longitudinal center plane 80 of the valve core 2 refers to a plane passing through the center of the valve core 2 in the vertical direction, as shown in Figures 11 and 15 .

[0120] The first valve core flow channel 223 and the second valve core flow channel 224 are respectively located on both sides of the longitudinal center plane 80 of the valve core 2, so that the first valve core flow channel 223 and the second valve core flow channel 224 do not exceed the center of the valve core 2 and maintain a certain distance from the center of the valve core 2, thereby helping to reduce the impact of the opening of the valve core flow channel 22 on the structural strength of the valve core 2.

[0121] In addition, in order to facilitate the positioning between the valve core 2 and the valve body 10, as an embodiment, as shown in Figures 6 and 7, a positioning protrusion 12 is provided on one of the valve core 2 and the valve body 10, and a positioning groove 21 is provided on the other of the valve core 2 and the valve body 10. The positioning protrusion 12 can extend into the positioning groove 21, and the cross-sectional area of ​​the positioning protrusion 12 is smaller than the cross-sectional area of ​​the positioning groove 21.

[0122] During the installation of the valve core 2 and the valve body 10, the positioning projection 12 can be inserted into the positioning groove 21 to achieve a rough positioning of the valve core 2 and the valve body 10, which is simple and convenient. In addition, because the cross-sectional area of ​​the positioning projection 12 is set to be smaller than the cross-sectional area of ​​the positioning groove 21, after the valve core 2 and the valve body 10 are aligned, a gap can be formed between the circumference of the positioning projection 12 and the positioning groove 21, thereby reducing the rotational resistance of the valve body 10 to the valve core 2.

[0123] Optionally, the positioning protrusion 12 on the valve body 10 , or the positioning groove 21 on the valve body 10 may be located at the bottom of the valve body 10 .

[0124] In order to ensure that there is a gap between the outer surface of the positioning protrusion 12 and the groove wall of the positioning groove 21, as an embodiment, as shown in Figures 6 and 7, the switching valve 1 also includes a valve core base 30, which is located in the accommodating cavity 11 and connected to the valve body 10. The valve core base 30 is supported on the bottom of the valve core 2 and ensures that there is a gap between the outer surface of the positioning protrusion 12 and the groove wall of the positioning groove 21.

[0125] In order to reduce the resistance of the valve core 2 to the valve core base 30 during its rotation, as an embodiment, as shown in Figures 7 and 9, the valve core base 30 has a support portion 31 in contact with the valve core 2, and the support portion 31 is constructed to be able to form a line contact with the outer surface of the valve core 2. The valve core base 30 forms a line contact with the outer surface of the valve core 2 through the support portion 31. On the one hand, it can support the valve core 2 so that the valve core 2 is located in the center of the accommodating cavity 11. On the other hand, it can reduce the contact area between the valve core base 30 and the valve core 2, reducing the resistance of the valve core base 30 to the valve core 2 during its rotation, reducing the influence of the valve core base 30 on the rotation of the valve core 2, and improving the switching speed of the switching valve 1.

[0126] The present disclosure does not limit the specific structure of the above-mentioned support portion 31. As an embodiment, as shown in Figures 7 and 9, the support portion 31 has a tapered surface 32. The radial cross-sectional area of ​​the tapered surface 32 gradually increases from the end of the support portion 31 away from the valve core 2 to the end of the support portion 31 close to the valve core 2. The outer surface of the valve core 2 can form a line contact with the tapered surface 32. Here, the valve core base 30 can be structurally the same as the valve seat assembly 3 in this article, or the same as the valve core seal 40 in this article. In other words, the valve core seal 40 can be used as the valve core base 30, and the channel wall of the tapered channel section 4111 of the valve core seal 40 is the support portion 31, which forms a line contact with the outer surface of the valve core 2.

[0127] As another embodiment, the support portion 31 has an arcuate surface, and the area of ​​the radial cross-section of the arcuate surface gradually increases along the direction from the end of the support portion 31 away from the valve core 2 to the end of the support portion 31 close to the valve core 2, and the outer surface of the valve core 2 can form a linear contact with the arcuate surface.

[0128] To facilitate insertion of the positioning protrusion 12 into the positioning groove 21, as one embodiment, as shown in FIG7 , the positioning groove 21 includes a main section 211 and a gradually expanding section 212. The cross-sectional area of ​​the positioning protrusion 12 is smaller than that of the main section 211. The cross-sectional area of ​​the gradually expanding section 212 gradually increases from the end of the gradually expanding section 212 closest to the main section 211 to the end of the gradually expanding section 212 further away from the main section 211. During insertion of the positioning protrusion 12 into the positioning groove 21, the gradually expanding section 212 avoids the end of the positioning protrusion 12, thereby facilitating insertion of the positioning protrusion 12 into the main section 211.

[0129] In order to facilitate the assembly and disassembly between the valve core base 30 and the valve body 10, as an embodiment, as shown in Figures 6 and 7, the valve body 10 is provided with a mounting groove 13 that is connected to the accommodating cavity 11, and the valve core base 30 is provided with an insertion portion 33, which is inserted into the mounting groove 13, and the positioning protrusion 12 passes through the valve core base 30 and extends into the positioning groove 21. In this way, when assembling the switching valve 1, the insertion portion 33 of the valve core base 30 can be inserted into the mounting groove 13 first, and then the valve core 2 can be installed in the accommodating cavity 11, so that the valve core base 30 is clamped between the valve core 2 and the valve body 10, completing the installation of the valve core base 30. Moreover, by simply removing the valve core 2 from the accommodating cavity 11, the insertion portion 33 of the valve core base 30 can be removed from the mounting groove 13, and the valve core base 30 can be replaced, which is very convenient.

[0130] In addition, to facilitate installation of the valve core 2, as an embodiment, as shown in Figures 6 and 8, the switching valve 1 may further include a valve cover assembly 50. The valve cover assembly 50 includes a valve cover body 51. A valve cover mounting hole 53 is formed on the valve body 10 and communicates with the accommodating chamber 11. The valve cover mounting hole 53 is configured to allow the valve core 2 to pass through. The valve cover body 51 is installed in the valve cover mounting hole 53. The switching valve 1 also includes a drive rod 54. A first through hole 511 is formed on the valve cover body 51. The drive rod 54 passes through the first through hole 511 and is connected to the valve core 2. In other words, when installing the valve core 2, the valve core 2 can be first placed into the accommodating chamber 11 through the valve cover mounting hole 53, and then the drive rod 54 is connected to the valve core 2. Finally, the valve cover body 51 is installed in the valve cover mounting hole 53, and the drive rod 54 is passed through the first through hole 511. Alternatively, the valve core 2 can be placed into the accommodating cavity 11 through the valve cover mounting hole 53 first, and then the valve cover body 51 can be installed in the valve cover mounting hole 53, and finally the drive rod 54 can be connected to the valve core 2 and passed through the first through hole 511.

[0131] 6 , part of the valve core 2 may be located in the first through hole 511. That is, the valve core 2 may be accommodated by both the first through hole 511 and the accommodating cavity 11, which is beneficial for reducing the overall volume of the switching valve 1.

[0132] To improve the sealing performance of the accommodating chamber 11, as an embodiment, as shown in Figures 6 and 8, the valve cover assembly 50 further includes a gland 52, which is mounted on the side of the valve cover body 51 away from the accommodating chamber 11. The gland 52 is formed with a second through-hole 521 for the drive rod 54 to pass through. The radial cross-sectional area of ​​the second through-hole 521 is smaller than the radial cross-sectional area of ​​the first through-hole 511. Because the radial cross-sectional area of ​​the second through-hole 521 is smaller than the radial cross-sectional area of ​​the first through-hole 511, after the valve cover body 51 is mounted in the valve cover mounting hole 53, the drive rod 54 can be passed through the second through-hole 521, and the gland 52 is mounted on the side of the valve cover body 51 away from the accommodating chamber 11, thereby reducing the gap between the first through-hole 511 and the drive rod 54, thereby improving the sealing performance of the accommodating chamber.

[0133] Spool 2

[0134] As shown in Figures 10 to 17, the present disclosure further provides a valve core 2 of a switching valve 1, comprising a core body 20 and at least one valve core flow channel 22 extending through the core body 20. As mentioned above, the valve core flow channel 22 comprises a first flow channel section 221 and a second flow channel section 222. The first flow channel section 221 and the second flow channel section 222 intersect and communicate with each other, and the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 are both straight lines.

[0135] Since the valve core flow channel 22 in the valve core 2 includes a first flow channel section 221 and a second flow channel section 222, and the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 are both straight lines, it is easy to process the valve core flow channel 22. For example, a punching tool (e.g., a cylindrical drill bit) can be used to punch holes along a straight line on the core body 20 to respectively form the first flow channel section 221 and the second flow channel section 222, and the first flow channel section 221 and the second flow channel section 222 are made to intersect and communicate with each other, thereby forming the valve core flow channel 22 that runs through the core body 20 through the first flow channel section 221 and the second flow channel section 222.

[0136] The angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 is an obtuse angle.

[0137] In addition, since the angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 is an obtuse angle, the flow resistance of the fluid in the valve core flow channel 22 can be reduced, which is beneficial to improving the performance of the switching valve 1.

[0138] The angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 can be constructed as any suitable angle. As an embodiment, the angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 can be 108°~120°, so that the valve core flow channel 22 has a smaller flow resistance to the fluid.

[0139] In order to enable the first flow channel section 221 and the second flow channel section 222 to intersect and connect with each other, as an embodiment, the first flow channel section 221 has a first flow channel side wall 2211, the second flow channel section 222 has a second flow channel side wall 2221, and the first flow channel section 221 also has a first transition connecting wall 2212. The first transition connecting wall 2212 is located at the intersection of at least a portion of the first flow channel section 221 and at least a portion of the second flow channel section 222, and the first transition connecting wall 2212 protrudes from the second flow channel side wall 2221 toward the outside of the second flow channel section 222.

[0140] As another embodiment, referring to Figures 15 and 16, the first flow channel section 221 has a first flow channel side wall 2211, the second flow channel section 222 has a second flow channel side wall 2221, and the second flow channel section 222 also has a second transition connecting wall 2222. The second transition connecting wall 2222 is located at the intersection of at least a portion of the first flow channel section 221 and at least a portion of the second flow channel section 222, and the second transition connecting wall 2222 protrudes from the first flow channel side wall 2211 toward the outside of the first flow channel section 221.

[0141] As another embodiment, as shown in Figures 11 and 12, the first flow channel section 221 has a first flow channel side wall 2211, the second flow channel section 222 has a second flow channel side wall 2221, the first flow channel section 221 also has a first transition connecting wall 2212, the first transition connecting wall 2212 is located at the intersection of at least part of the first flow channel section 221 and at least part of the second flow channel section 222, the first transition connecting wall 2212 protrudes from the second flow channel side wall 2221 toward the outside of the second flow channel section 222, the second flow channel section 222 also has a second transition connecting wall 2222, the second transition connecting wall 2222 is located at the intersection of at least part of the first flow channel section 221 and at least part of the second flow channel section 222, the second transition connecting wall 2222 protrudes from the first flow channel side wall 2211 toward the outside of the first flow channel section 221.

[0142] When processing the valve core flow channel 22, the end of the first flow channel section 221 close to the second flow channel section 222 can be processed to the second flow channel side wall 2221 protruding from the second flow channel section 222, thereby forming the above-mentioned first transition connecting wall 2212, so that the first flow channel section 221 and the second flow channel section 222 intersect and communicate with each other, and the connection between the first flow channel and the second flow channel has sufficient flow area; and / or, the end of the second flow channel section 222 close to the first flow channel section 221 is processed to the first flow channel side wall 2211 protruding from the first flow channel section 221, thereby forming the second transition connecting wall 2222, so that the first flow channel section 221 and the second flow channel section 222 intersect and communicate with each other, and the connection between the first flow channel and the second flow channel has sufficient flow area.

[0143] Furthermore, the first transition connecting wall 2212 protrudes outward from the second flow channel sidewall 2221, and / or the second transition connecting wall 2222 protrudes outward from the first flow channel sidewall 2211, thereby increasing the space at the bend of the valve core flow channel 22, reducing the resistance to fluid flow at the bend of the valve core flow channel 22, and alleviating the impact and wear of the fluid on the bend of the valve core flow channel 22. It is understood that the bend of the valve core flow channel 22 is the intersection of the first flow channel section 221 and the second flow channel section 222.

[0144] For the embodiment in which the above-mentioned second flow channel section 222 has a second transition connecting wall 2222, as shown in Figure 16, the second transition connecting wall 2222 may include a second transition connecting side wall and a second transition connecting end wall perpendicular to the second transition connecting side wall, the extension direction of the second transition connecting side wall is the same as the extension direction of the second flow channel side wall 2221, one end of the second transition connecting side wall is connected to the second flow channel side wall 2221, the other end of the second transition connecting side wall is connected to one end of the second transition connecting end wall, and the other end of the second transition connecting end wall is connected to the first flow channel side wall 2211.

[0145] When the punching tool is used to create the first flow channel section 221 and the second flow channel section 222, the first flow channel section 221 can be created first, and then the second flow channel section 222 can be created. The length of the second flow channel section 222 can be greater than the length of the first flow channel section 221, thereby forming the second transition connecting wall 2222, thereby achieving the intersection and connection between the first flow channel section 221 and the second flow channel section 222. In other words, the second transition connecting wall 2222 can be formed when the punching tool is used to create the second flow channel section 222. By using the punching tool to create the first flow channel section 221 and the second flow channel section 222 in a straight line, the first flow channel section 221 and the second flow channel section 222 can be intersected and connected.

[0146] For the embodiment in which the first flow channel section 221 has a first transition connecting wall 2212 and the second flow channel section 222 has a second transition connecting wall 2222, as shown in FIG12 , the first transition connecting wall 2212 includes a first connecting side wall 22121 and a first connecting end wall 22122 perpendicular to the first connecting side wall 22121, the extending direction of the first connecting side wall 22121 is the same as the extending direction of the first flow channel side wall 2211, and the second transition connecting wall 2222 includes a second connecting side wall 22221 and a first connecting end wall 22122 perpendicular to the first connecting side wall 22121. The second connecting end wall 22222 is perpendicular to the second connecting side wall 22221, the extension direction of the second connecting side wall 22221 is the same as the extension direction of the second flow channel side wall 2221, the first connecting end wall 22122 is connected to at least part of the second flow channel side wall 2221, the second connecting end wall 22222 is connected to at least part of the first flow channel side wall 2211, and the end of the first connecting side wall 22121 away from the first connecting end wall 22122 is connected to the end of the second connecting side wall 22221 away from the second connecting end wall 22222.

[0147] When the punching tool is used to open the first flow channel section 221 and the second flow channel section 222, at least a portion of the valve core flow channel 22 wall of the first flow channel section 221 and at least a portion of the valve core flow channel 22 wall of the second flow channel section 222 can be made to intersect, for example, in an "X" shape as shown in FIG12 , thereby forming the above-mentioned first transition connecting wall 2212 and second transition connecting wall 2222, thereby achieving intersection and communication between the first flow channel section 221 and the second flow channel section 222. In other words, the first transition connecting wall 2212 and the second transition connecting wall 2222 can be formed when the punching tool is used to open the second flow channel section 222. By opening the first flow channel section 221 and the second flow channel section 222 along a straight line with the punching tool, the first flow channel section 221 and the second flow channel section 222 can be made to intersect and communicate with each other.

[0148] Here, the opening length of the first flow channel section 221 and the opening length of the second flow channel section 222 may be the same or different, and this disclosure does not limit this.

[0149] In addition, in different working states of the switching valve 1, the fluid may flow through the valve core channel 22 in different flow directions. In order to make the flow resistance of the fluid with different flow directions at the inflection point of the valve core channel 22 (that is, the intersection of the first channel section 221 and the second channel section 222) roughly the same, as an embodiment, as shown in Figures 11 and 12, the first transition connecting wall 2212 and the second transition connecting wall 2222 can be symmetrical about the angular bisector 81 of the angle formed by the central axis of the first channel section 221 and the central axis of the second channel section 222, so that the flow resistance of the fluid with different flow directions at the inflection point of the valve core channel 22 can be roughly the same.

[0150] To ensure that fluids flowing in different directions experience approximately the same flow resistance within the valve core flow channel 22, as one embodiment, as shown in FIG16 , the first flow channel sidewall 2211 defines a first flow space 25, and the second flow channel sidewall 2221 defines a second flow space 26. The radial cross-sectional area of ​​the first flow space 25 can be equal to the radial cross-sectional area of ​​the second flow space 26. Because the radial cross-sectional area of ​​the first flow space 25 is equal to the radial cross-sectional area of ​​the second flow space 26, the resistance encountered by fluids flowing through the first flow space 25 and then the second flow space 26 is approximately the same as the resistance encountered by fluids flowing through the second flow space 26 and then the first flow space 25. This ensures that fluids flowing in different directions experience approximately the same flow resistance within the valve core flow channel 22.

[0151] Here, it should be noted that the radial cross-section of the first flow space 25 refers to the cross-section obtained by cutting along the radial direction of the first flow space 25 (i.e., the radial direction of the first flow channel section 221, that is, the direction perpendicular to the axial direction of the first flow space 25 / first flow channel section 221), and the radial cross-section of the second flow space 26 refers to the cross-section obtained by cutting along the radial direction of the second flow space 26 (i.e., the radial direction of the second flow channel, that is, the direction perpendicular to the axial direction of the second flow space 26 / second flow channel).

[0152] In addition, when processing the valve core flow channel 22, in order to facilitate the drilling and positioning of the punching tool, as an embodiment, as shown in Figures 10, 11 and 13, a first groove 23 and a second groove 24 are formed on the core body 20, the first flow channel section 221 has a first flow opening 2213, and the second flow channel section 222 has a second flow opening 2223. The first flow opening 2213 is located on the bottom wall of the first groove 23, and the second flow opening 2223 is located on the bottom wall of the second groove 24.

[0153] Before the punching tool is used to form the first flow channel section 221 and the second flow channel section 222, a first groove 23 and a second groove 24 are formed on the core body 20. Then, the first flow channel section 221 is formed starting from the bottom wall of the first groove 23, and the second flow channel section 222 is formed starting from the bottom wall of the second groove 24. In this way, the first flow opening 2213 is located on the bottom wall of the first groove 23, and the second flow opening 2223 is located on the bottom wall of the second groove 24. When punching the first flow channel section 221, the punching tool is positioned by the first groove 23, and when punching the second flow channel section 222, the punching tool is positioned by the second groove 24. This can increase the positioning speed of the punching tool when machining the valve core flow channel 22, thereby improving the machining efficiency of the valve core flow channel 22.

[0154] Of course, in other embodiments, as shown in FIG. 14 and FIG. 15 , holes may be directly drilled from the outer surface of the core 20 by a punching tool to form the first flow channel section 221 and the second flow channel section 222 .

[0155] In the process of machining the valve core flow channel 22, in order to avoid interference between the punching tool and the side wall of the first groove 23 or the side wall of the second groove 24, as an embodiment, as shown in Figures 10, 11 and 13, the area of ​​the bottom wall of the first groove 23 can be larger than the area of ​​the first flow port 2213, and the area of ​​the bottom wall of the second groove 24 can be larger than the area of ​​the second flow port 2223.

[0156] It should be noted that the area of ​​the bottom wall of the above-mentioned first groove 23 refers to the area of ​​the bottom wall of the first groove 23 before the first flow opening 2213 is formed, and the area of ​​the bottom wall of the second groove 24 refers to the area of ​​the bottom wall of the second groove 24 before the second flow opening 2223 is formed.

[0157] Since the punching tool may be positioned obliquely relative to the bottom wall of the first groove 23 during the machining of the first flow channel section 221, the area of ​​the bottom wall of the first groove 23 is set larger than the area of ​​the first through-flow opening 2213 to avoid interference between the punching tool and the sidewalls of the first groove 23. Similarly, since the punching tool may be positioned obliquely relative to the bottom wall of the second groove 24 during the machining of the second flow channel section 222, the area of ​​the bottom wall of the second groove 24 is set larger than the area of ​​the second through-flow opening 2223 to avoid interference between the punching tool and the sidewalls of the second groove 24.

[0158] In order to reduce the friction between the valve core 2 and the valve seat assembly 3 or the valve core seal 40 during the rotation of the valve core 2, as an embodiment, as shown in Figures 10, 11 and 13, the first groove 23 has a first groove 231 located on the outer surface of the core body 20, and the second groove 24 has a second groove 241 located on the outer surface of the core body 20, and the mouth wall of the first groove 231 and the side wall of the first groove 23 are connected in an arc-shaped transition, and the mouth wall of the second groove 241 and the side wall of the second groove 24 are connected in an arc-shaped transition. By forming an arc-shaped transition connection between the mouth wall of the first notch 231 and the side wall of the first groove 23, the friction between the side wall of the first groove 23 and the valve core seal 40 during the rotation of the valve core 2 can be reduced. By forming an arc-shaped transition connection between the mouth wall of the second notch 241 and the side wall of the second groove 24, the friction between the side wall of the second groove 24 and the valve core seal 40 during the rotation of the valve core 2 can be reduced, thereby reducing the friction between the valve core 2 as a whole and the valve core seal 40 during the rotation process, and further reducing the rotation resistance of the valve core 2.

[0159] As another embodiment, as shown in Figures 14, 15 and 17, the first flow channel section 221 has a first flow opening 2213 located on the outer surface of the core body 20 and a first flow channel side wall 2211 located inside the core body 20, the second flow channel section 222 has a second flow opening 2223 located on the outer surface of the core body 20 and a second flow channel side wall 2221 located inside the core body 20, an arc-shaped transition connection between the mouth wall of the first flow opening 2213 and the first flow channel side wall 2211, and an arc-shaped transition connection between the second flow opening 2223 and the second flow channel side wall 2221.

[0160] Through the arc-shaped transition connection between the mouth wall of the first flow port 2213 and the first flow channel side wall 2211, the friction between the first flow channel side wall 2211 and the valve core seal 40 during the rotation of the valve core 2 can be reduced. Through the arc-shaped transition connection between the second flow port 2223 and the second flow channel side wall 2221, the friction between the second flow channel side wall 2221 and the valve core seal 40 during the rotation of the valve core 2 can be reduced. Such a setting can reduce the friction between the valve core 2 and the valve core seal 40 during the rotation, thereby reducing the rotation resistance of the valve core 2.

[0161] The present disclosure does not limit the radial cross-sectional shape of the first flow channel segment 221 and the second flow channel segment 222. The radial cross-sectional shape of the first flow channel segment 221 and the second flow channel segment 222 can be any appropriate shape. For example, as shown in Figures 10 and 14, the radial cross-sectional shape of at least a portion of the first flow channel segment 221 can be circular; or, the radial cross-sectional shape of at least a portion of the second flow channel segment 222 can also be semicircular.

[0162] It should be noted here that the above-mentioned semicircle refers to a semicircle with a central angle less than 360° and a straight side, and is not limited to a semicircle with a central angle of 360°.

[0163] 11 and 15 , there may be a plurality of valve core flow channels 22, which may include a first valve core flow channel 223 and a second valve core flow channel 224. The first valve core flow channel 223 and the second valve core flow channel 224 may be located on either side of the longitudinal center plane 80 of the core body 20. The longitudinal center plane 80 of the core body 20 refers to a plane passing through the center of the core body 20 in the vertical direction, as shown in FIG11 and 15 .

[0164] The first valve core flow channel 223 and the second valve core flow channel 224 are respectively located on both sides of the longitudinal center plane 80 of the core body 20, so that the first valve core flow channel 223 and the second valve core flow channel 224 do not exceed the center of the core body 20 and maintain a certain distance from the center of the core body 20, thereby helping to reduce the impact of the opening of the valve core flow channel 22 on the structural strength of the core body 20.

[0165] Through the first valve core flow channel 223 and the second valve core flow channel 224, at least four fluid pipelines connected to the switching valve 1 can be connected to each other, and by rotating the core body 20, at least four fluid pipelines can be disconnected and switched. In the embodiment where there is only one first valve core flow channel 223 and one second valve core flow channel 224, the valve core 2 can be used in a four-way valve. Of course, the number of first valve core flow channels 223 and the number of second valve core flow channels 224 can also be multiple.

[0166] The present disclosure does not limit the specific positions of the first valve core flow channel 223 and the second valve core flow channel 224. As an embodiment, as shown in Figures 11 and 15, the first valve core flow channel 223 and the second valve core flow channel 224 can be symmetrically arranged about the longitudinal center plane 80, so that the two fluid pipelines connected to the switching valve 1 can be connected through the first valve core flow channel 223 and can also be connected through the second valve core flow channel 224, which is conducive to reducing the difficulty of assembling the core body 20 and the valve body 10.

[0167] To facilitate assembly between the core body 20 and the drive rod 54 of the switching valve 1, as one embodiment, as shown in Figures 6, 8, 10, and 14, a transmission groove 27 for connecting to the drive rod 54 of the switching valve 1 is provided on the core body 20. At least one end of the transmission groove 27 along its length is an open end 271, and the open end 271 is used to allow the drive rod 54 to be inserted into the transmission groove 27. Since at least one end of the transmission groove 27 along its length is an open end 271, the drive rod 54 can be inserted into the transmission groove 27 from the notch of the transmission groove 27 or from the open end 271 of the transmission groove 27, thereby facilitating assembly between the core body 20 and the drive rod 54 of the switching valve 1.

[0168] In order to facilitate the positioning between the core body 20 and the valve body 10, as an embodiment, as shown in Figures 6 and 7, the core body 20 is provided with a positioning groove 21 for cooperating with the positioning protrusion 12 on the valve body 10 of the switching valve 1, and the cross-sectional area of ​​the positioning groove 21 is set to be larger than the cross-sectional area of ​​the positioning protrusion 12, or, the core body 20 is provided with a positioning protrusion 12 for cooperating with the positioning groove 21 on the valve body 10 of the switching valve 1, and the cross-sectional area of ​​the positioning protrusion 12 is set to be smaller than the cross-sectional area of ​​the positioning groove 21.

[0169] During the installation process of the core 20 and the valve body 10, the core 20 and the valve body 10 can be roughly positioned by inserting the positioning protrusion 12 into the positioning groove 21, which is simple and convenient. In addition, because the cross-sectional area of ​​the positioning groove 21 is set to be larger than the cross-sectional area of ​​the positioning protrusion 12, after the core 20 and the valve body 10 are aligned, a gap can be left between the circumference of the positioning protrusion 12 and the positioning groove 21, thereby reducing the rotational resistance of the valve body 10 on the core 20.

[0170] Optionally, the positioning protrusion 12 on the valve body 10 , or the positioning groove 21 on the valve body 10 may be located at the bottom of the valve body 10 .

[0171] In order to make it easier for the positioning protrusion 12 to be inserted into the positioning groove 21, as an embodiment, as shown in FIG7 , the notch of the positioning groove 21 is formed as a gradually expanding section 212. During the insertion process of the positioning protrusion 12 into the positioning groove 21, the gradually expanding section 212 avoids the end of the positioning protrusion 12, making it easier for the positioning protrusion 12 to be inserted into the positioning groove 21.

[0172] The volume of the valve core flow channel 22 of the present disclosure can be configured to have any suitable ratio to the volume of the core body 20, and the present disclosure is not limited thereto. As an embodiment, the ratio of the volume of the valve core flow channel 22 to the volume of the core body 20 can be 0.21 to 0.28, which can provide the valve core flow channel 22 with a larger flow area. For multiple embodiments of the valve core flow channel 22 (for example, the embodiment in which the valve core flow channel 22 includes a first valve core flow channel 223 and a second valve core flow channel 224), it can be understood that the ratio of the volume of the valve core flow channel 22 to the volume of the core body 20 here refers to the ratio of the volume of each valve core flow channel 22 to the volume of the core body 20.

[0173] The present disclosure does not limit the shape of the core 20. As an embodiment, as shown in Figures 10 and 14, the core 20 can be a sphere, so that the flow area of ​​the valve core flow channel 22 can be designed to be larger, and the rotational friction between the outer surface of the core 20 and the valve seat assembly 3 or other structures can also be reduced. As another embodiment, the core 20 can also be a cylinder.

[0174] In addition, in order to reduce the rotational friction between the outer surface of the core body 20 and the valve seat assembly 3 or other structures, the surface roughness of the core body 20 can be 0.4μm~0.8μm, which is conducive to reducing the friction between the valve core 2 and the valve seat assembly 3 (such as the valve core seal 40 of the valve seat assembly 3) or other structures during rotation, and can also make the outer surface of the core body 20 and the valve seat assembly 3 have good sealing properties.

[0175] Valve core seal 40

[0176] As shown in Figures 18 to 22, the present disclosure also provides a valve core seal 40 of a switching valve 1, which includes a sealing body 41, the sealing body 41 having a second end and a first end relative to each other, and a flow channel 411 is provided on the sealing body 41, which runs from the second end to the first end, and the flow channel 411 is used to communicate with the valve core flow channel 22 in the valve core 2 of the switching valve 1, wherein the flow channel 411 includes a tapered channel section 4111, and the axial cross-section of the tapered channel section 4111 is trapezoidal, and the area of ​​the radial cross-section of the tapered channel section 4111 gradually increases along the direction from the first end to the second end of the sealing body, so that the tapered channel section 4111 can accommodate part of the valve core 2, and the channel wall of the tapered channel section 4111 can form a linear contact with the outer surface of the valve core 2.

[0177] Here, it should be noted that the axial cross-section of the above-mentioned conical channel section 4111 refers to the cross-section obtained by cutting along the axial direction of the conical channel section 4111; the radial cross-section of the conical channel section 4111 refers to the cross-section obtained by cutting along the radial direction of the conical channel section 4111 (i.e., the direction perpendicular to the axial direction of the conical channel section 4111).

[0178] Through the above technical solution, since the seal body 41 has a second end and a first end that are opposite to each other, and a flow passage 411 extending from the second end to the first end is provided on the seal body 41, when the valve core seal 40 is installed on the valve body 10 and contacts the valve core 2, the valve core flow channel 22 within the valve core 2 can communicate with the fluid pipeline connected to the switching valve 1 via the flow passage 411 on the valve core seal 40. The tapered channel section 4111 of the flow passage 411 has a trapezoidal axial cross-section, and the radial cross-section area of ​​the tapered channel section 4111 gradually increases from the first end to the second end. When installing the seal body 41, the second end can be positioned toward the valve core 2, allowing a portion of the valve core 2 to be located within the tapered channel section 4111. The channel wall of the tapered channel section 4111 can form a linear contact with the outer surface of the valve core 2, thereby sealing the valve core 2.

[0179] The valve core seal 40 provided by the present invention can form a linear contact with the outer surface of the valve core 2 through the channel wall of the tapered channel section 4111. On the one hand, it can seal the gap at the connection between the valve core flow channel 22 in the valve core 2 and the flow channel 411 in the valve core seal 40. On the other hand, it can make the valve core seal 40 and the valve core 2 have a smaller contact area, reduce the resistance of the valve core seal 40 during the rotation of the valve core 2, reduce the influence of the valve core seal 40 on the rotation of the valve core 2, and improve the switching speed of the switching valve 1.

[0180] In addition, along the axial direction of the conical channel section 4111, any position of the channel wall of the conical channel section 4111 can be used to form linear contact with the outer surface of the valve core 2. Therefore, the requirements for the manufacturing accuracy of the valve core seal 40 and the valve core 2 can be reduced, thereby reducing the processing and manufacturing costs.

[0181] The present disclosure does not limit the specific structure of the flow passage 411. Optionally, as shown in Figures 9 and 21, the tapered passage section 4111 has a large-diameter end and a small-diameter end, with the large-diameter end having a larger area than the small-diameter end, and the large-diameter end being located on the end surface 416 of the second end of the seal body. In other words, the location of the tapered passage section 4111 having the largest radial cross-sectional area is located on the end surface 416 of the second end of the seal body. When the valve core 2 contacts the valve core seal 40, a portion of the valve core 2 can easily enter the first passage from the large-diameter end of the tapered passage section 4111.

[0182] In addition, as an embodiment, as shown in Figures 9 and 21, the flow channel 411 can also include a cylindrical channel section 4112, the axial cross-section of the cylindrical channel section 4112 is square (that is, the cross-section obtained by cutting along the axial direction of the cylindrical channel section 4112), one end of the cylindrical channel section 4112 is connected to the conical channel section 4111, and the other end of the cylindrical channel section 4112 is located on the end face of the first end of the seal body.

[0183] As another embodiment, the small diameter end of the tapered channel section 4111 may be located on the end surface of the first end of the seal body.

[0184] To reduce the resistance of the flow channel 411 to the fluid, as an embodiment, the radial cross-sections of the tapered channel section 4111 and the cylindrical channel section 4112 can both be circular. This configuration allows for a smooth transition between the tapered channel section 4111 and the cylindrical channel section 4112, reducing the resistance of the flow channel 411 to the fluid.

[0185] In addition, the radial cross-section of the tapered channel section 4111 is circular, so that the channel wall can cooperate with the outer surface of the spherical valve core 2 to have good sealing performance.

[0186] Optionally, as shown in Figures 9 and 21 , the axial cross-section of the tapered channel section 4111 can be an isosceles trapezoid, thereby achieving a good sealing effect between the channel wall of the tapered channel section 4111 and the outer surface of the spherical valve core 2. In particular, in embodiments where the radial cross-section of the tapered channel section 4111 is circular, the axial cross-section of the tapered channel section 4111 is an isosceles trapezoid, allowing its channel wall to conform to the outer surface of the spherical valve core 2, thereby achieving a good seal. It is understood that in other embodiments, the axial cross-section of the tapered channel section 4111 can also be a right-angled trapezoid, etc.

[0187] The present disclosure does not limit the angle between the two waists of the trapezoid. As an embodiment, the angle between the two waists of the trapezoid can be 115° to 125°. The angle between the two waists of the trapezoid is 115° to 125°, which is conducive to adapting to the shape of the spherical valve core 2, so that the channel wall of the tapered channel section 4111 forms a linear contact with the outer surface of the valve core 2.

[0188] The present disclosure does not limit the material of the seal body 41. As an embodiment, the seal body 41 can be made of polytetrafluoroethylene. Polytetrafluoroethylene has excellent lubricity and sealing properties. Therefore, making the seal body 41 of polytetrafluoroethylene further reduces the frictional resistance between the channel wall of the tapered channel section 4111 and the outer surface of the valve core 2, and can achieve a good seal between the channel wall of the tapered channel section 4111 and the outer surface of the valve core 2.

[0189] As another embodiment, the seal body 41 may also be made of copper.

[0190] Valve seat assembly 3

[0191] As shown in Figures 18 to 22, the present disclosure further provides a valve seat assembly 3 for a switching valve 1, comprising the aforementioned valve core seal 40 and a mounting seat 4. The valve core seal 40 includes a seal body 41, which is provided with a flow passage 411 extending from a first end of the seal body 41 to a second end of the seal body 41. The flow passage 411 is adapted to accommodate a portion of the valve core 2 of the switching valve 1, and at least a portion of the channel wall of the flow passage 411 is configured to sealably contact the outer surface of the valve core 2. The flow passage 411 is capable of communicating with the valve core flow channel 22 within the valve core 2. The mounting seat 4 is configured to connect to the valve body 10 of the switching valve 1. The first end of the seal body 41 is mounted within the mounting seat 4, and the second end of the seal body 41 is located outside the mounting seat 4.

[0192] When installing the valve seat assembly 3, the mounting seat 4 can be connected to the valve body 10, and the first end of the sealing body 41 can be installed in the mounting seat 4, so that the second end of the sealing body 41 is set toward the valve core 2, so that part of the valve core 2 can be located in the flow channel 411, and the channel wall of the flow channel 411 can be in sealing contact with the outer surface of the valve core 2, thereby sealing the valve core 2.

[0193] Through the above technical solution, since the second end of the sealing body 41 of the valve core seal 40 provided by the present invention is located outside the mounting seat 4, that is, the second end of the sealing body 41 of the valve core seal 40 protrudes from the mounting seat 4 toward the outside of the mounting seat 4, the valve core 2 can form a sealing contact with the channel wall of the flow channel 411 while avoiding the outer surface of the valve core 2 from contacting the mounting seat 4, avoiding friction between the valve core 2 and the mounting seat 4 during rotation, and reducing the influence of the mounting seat 4 on the rotation of the valve core 2.

[0194] It should be noted that the valve seat assembly 3 provided in the present disclosure can be a valve seat assembly 3 surrounding the rotation axis of the valve core 2, or it can be a valve seat assembly 3 located at the bottom of the valve core 2 and used to support the valve core 2. The present disclosure does not limit the specific position of the valve seat assembly 3 on the valve body 10.

[0195] In order to prevent the second end of the sealing body 41 from being deformed by the valve core 2 and affecting the sealing effect of the valve core seal 40, as shown in Figure 22, the second end of the sealing body 41 is provided with an abutment portion 49, which protrudes outward from the sealing body 41 radially along the flow channel 411, and the abutment portion 49 abuts against the end face of the mounting seat 4 close to the abutment portion 49.

[0196] When the second end of the sealing body 41 is pushed against the valve core 2, the end face of the mounting seat 4 close to the abutment 49 supports the abutment 49, thereby supporting the second end of the sealing body 41 through the abutment 49, so that the second end of the sealing body 41 can be well supported, thereby avoiding the second end of the sealing body 41 being pushed against the valve core 2 and deformed, thereby ensuring the sealing effect of the valve core seal 40 on the valve core 2.

[0197] The present disclosure does not limit the specific structure of the abutment portion 49. As one embodiment, as shown in FIG20 , the abutment portion 49 may be an annular flange extending along the circumference of the through-flow channel 411. As another embodiment, the abutment portion 49 may be protrusions arranged at intervals along the circumference of the through-flow channel 411.

[0198] The mounting seat 4 can have any appropriate shape and structure. In one embodiment of the mounting seat 4, in order to enable the seal body 41 to be installed on the mounting seat 4, as shown in Figure 21, a snap-in hole 47 can be formed on the mounting seat 4, and the seal body 41 is snap-connected to the mounting seat 4 through the snap-in hole 47.

[0199] In order to enable the mounting seat 4 to be connected to the valve body 10 of the switching valve 1, optionally, as shown in Figure 3, a second clamping groove 6 (i.e., the third mounting hole 16 or the fourth mounting hole 17 mentioned above) can be formed on the valve body 10, and one end of the mounting seat 4 is clamped in the second clamping groove 6 and abuts against the bottom wall of the second clamping groove 6 (i.e., the inner wall of the second clamping groove 6 away from its own slot).

[0200] In order to enable the flow channel 411 to be connected to the fluid pipeline connected to the switching valve 1, optionally, as shown in Figure 3, a valve body flow channel 5 connected to the second clamping groove 6 can be formed on the valve body 10, and the valve body flow channel 5 is used to connect the flow channel 411 on the sealing body 41 with the fluid pipeline outside the switching valve 1.

[0201] To facilitate insertion of the valve core seal 40 into the mounting seat 4, as shown in FIG22 , an inflection portion 71 is provided between the abutment portion 49 and the seal body 41, and chamfers 70 may be provided at corners of the mounting seat 4 corresponding to the inflection portion 71. The chamfers 70 facilitate insertion of the seal body 41 into the mounting seat 4 and prevent scratches from the edges of the mounting seat 4 during insertion.

[0202] In order to prevent the abutment portion 49 from being squeezed by the groove wall of the second engaging groove 6 on the valve body 10 and deformed, thereby affecting the sealing effect of the valve core seal 40, as an embodiment, as shown in Figures 20 to 22, the outer peripheral surface of the abutment portion 49 is flush with the outer peripheral surface of the mounting seat 4. Since the outer peripheral surface of the abutment portion 49 is flush with the outer peripheral surface of the mounting seat 4, the abutment portion 49 will not be excessively squeezed by the groove wall of the second engaging groove 6, and thus will not be deformed and affect the sealing effect of the valve core seal 40. In addition, it is also beneficial to eliminate the gap 72 between the end of the abutment portion 49 away from the sealing body 41 and the groove wall of the second engaging groove 6, so that the groove wall of the second engaging groove 6 can abut the abutment portion 49, so that the sealing body 41 can well support the valve core 2.

[0203] To ensure that the portion of the seal body 41 protruding from the mounting seat 4 is not deformed by the valve core 2, as one embodiment, as shown in Figures 21 and 22, the end surface 416 of the second end of the seal body is flush with the end surface 491 of the abutment portion 49 at the end away from the mounting seat 4. This arrangement ensures that the end surface of the valve core seal 40 near the valve core 2 is flat, and the portion of the seal body 41 protruding from the mounting seat 4 is supported by the abutment portion 49, preventing the portion of the valve core seal 40 protruding from the mounting seat 4 from being deformed by the valve core 2.

[0204] In another embodiment of the mounting base 4, to enable the sealing body 41 to be mounted on the mounting base 4, as shown in FIG19 , a first engaging groove 46 is provided on the mounting base 4. The first end of the sealing body 41 is engaged in the first engaging groove 46 and abuts against the bottom wall of the first engaging groove 46 (i.e., the inner wall of the first engaging groove 46 away from the groove opening), and the second end of the sealing body 41 is located outside the first engaging groove 46. When the sealing body 41 is mounted in the first engaging groove 46, the bottom wall of the first engaging groove 46 abuts against the first end of the sealing body 41, which facilitates the channel wall of the flow channel 411 to maintain sealing contact with the outer surface of the valve core 2.

[0205] To enable the flow passage 411 to communicate with the fluid pipeline connected to the switching valve 1, as one embodiment, as shown in Figures 3, 6, and 19, a fluid passage 48 is provided on the mounting seat 4. One end of the fluid passage 48 communicates with the flow passage 411, and the other end of the fluid passage 48 penetrates the end surface of the mounting seat 4 away from the seal body 41. Because one end of the fluid passage 48 communicates with the flow passage 411, and the other end of the fluid passage 48 penetrates the end surface of the mounting seat 4 away from the seal body 41, the flow passage 411 can communicate with the fluid pipeline outside the switching valve 1 through the fluid passage 48.

[0206] To enable the mounting seat 4 to connect to the valve body 10 of the switching valve 1, as one embodiment, as shown in Figures 3, 6, 19, and 20, the outer circumferential surface of the mounting seat 4 (e.g., the first mounting seat 421 or the second mounting seat 431) may be provided with external threads (e.g., the first external threads 4211 or the second external threads 4311) configured to engage with threaded holes in the valve body 10 (e.g., the first mounting hole 14 or the second mounting hole 15). The threaded engagement of the external threads on the outer circumferential surface of the mounting seat 4 with the threaded holes in the valve body 10 allows the mounting seat 4 to be installed on or removed from the valve body 10. Furthermore, by rotating the mounting seat 4 circumferentially, the position of the valve seat assembly 3 can be adjusted, allowing the sealing body 41 to move closer to or further from the valve core 2. This not only adjusts the position of the valve core 2 within the accommodating chamber 11, but also ensures that the channel wall of the flow channel 411 forms a sealing contact with the outer surface of the valve core 2, thereby ensuring a tight seal. As another embodiment, the mounting seat 4 can also be fixed to the valve body 10.

[0207] Optionally, as shown in Figures 19 and 21, the seal body 41 may include a main body 34 and an insertion portion 33, the first end of the main body 34 is located in the snap-fit ​​hole 47 or the first snap-fit ​​groove 46, the second end of the main body 34 is located outside the snap-fit ​​hole 47 or the first snap-fit ​​groove 46, the abutment portion 49 is arranged at the second end of the main body 34, the insertion portion 33 is located in the snap-fit ​​hole 47 and connected to the first end of the main body 34, the outer peripheral surface of the main body 34 is in contact with the hole wall of the snap-fit ​​hole 47 or the groove wall of the first snap-fit ​​groove 46, and there is a gap 72 between the outer peripheral surface of the insertion portion 33 and the hole wall of the snap-fit ​​hole 47 or the groove wall of the first snap-fit ​​groove 46, and the gap 72 is used to accommodate the sealing ring 7. Since there is a gap 72 between the outer peripheral surface of the insertion part 33 and the hole wall of the snap-fit ​​hole 47 or the groove wall of the first snap-fit ​​groove 46, the sealing ring 7 can be installed on the insertion part 33. As shown in Figures 20 and 21, by clamping the sealing ring 7 between the main body 34 and the valve body 10 (that is, the bottom wall of the second snap-fit ​​groove 6), or clamping it between the main body 34 and the bottom wall of the first snap-fit ​​groove 46, a good seal can be achieved between the main body 34 and the valve body 10 or the mounting seat 4.

[0208] In one embodiment, in order to ensure that there is a sufficient sealing contact area between the sealing ring 7 and the main body 34 and the valve body 10, as shown in Figures 20 and 21, the distance between the outer peripheral surface of the insertion portion 33 and the hole wall of the snap-fit ​​hole 47 can be greater than the radial thickness of the sealing ring 7, so that the sealing ring 7 can be fully deformed in the gap 72 between the outer peripheral surface of the insertion portion 33 and the hole wall of the snap-fit ​​hole 47, thereby ensuring that there is a sufficient sealing contact area between the sealing ring 7 and the main body 34 and the valve body 10.

[0209] In another embodiment, in order to ensure that there is a sufficient sealing contact area between the sealing ring 7 and the main body 34 and the bottom wall of the first snap-fit ​​groove 46, as shown in Figure 19, the distance between the outer peripheral surface of the insertion portion 33 and the side wall of the first snap-fit ​​groove 46 can be greater than the radial thickness of the sealing ring 7, so that the sealing ring 7 can be fully deformed in the gap 72 between the outer peripheral surface of the insertion portion 33 and the side wall of the first snap-fit ​​groove 46, thereby ensuring that there is a sufficient sealing contact area between the sealing ring 7 and the main body 34 and the bottom wall of the first snap-fit ​​groove 46.

[0210] The channel wall of the flow channel 411 may form surface contact with the outer surface of the valve core 2 or may form line contact with the outer surface of the valve core 2 , which is not limited in the present disclosure.

[0211] For example, in one embodiment, the channel wall of the through-channel 411 may be formed into an arc-shaped structure that matches the outer surface of the spherical valve core 2 , thereby forming surface contact with the outer surface of the valve core 2 .

[0212] The switching valve 1 provided in the present disclosure can be used in any appropriate application scenario, for example, it can be used in a thermal management system 91. Therefore, as shown in FIG23 , according to another aspect of the present disclosure, a thermal management system 91 is also provided, including the switching valve 1 described above.

[0213] As shown in FIG. 24 , according to yet another aspect of the present disclosure, a vehicle 90 is provided, comprising the above-mentioned thermal management system 91 .

[0214] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0215] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0216] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A switching valve (1), characterized in that: include: A valve body (10) is provided with a receiving chamber (11) inside; A valve core (2) rotatably accommodated in the accommodation chamber (11); A plurality of valve seat assemblies (3), each of which is mounted on the valve body (10) and fits with the outer surface of the valve core (2); Wherein, the multiple valve seat assemblies (3) include a first valve seat assembly (42) and a second valve seat assembly (43), and the valve body (10) is provided with a first mounting hole (14) and a second mounting hole (15) both of which are connected to the accommodating cavity (11), the first valve seat assembly (42) is threadedly connected to the first mounting hole (14), and the second valve seat assembly (43) is threadedly connected to the second mounting hole (15).

2. The switching valve (1) according to claim 1, characterized in that: The axis of the first mounting hole (14) intersects with the axis of the second mounting hole (15).

3. The switching valve (1) according to claim 1 or 2, characterized in that: The first valve seat assembly (42) comprises a first mounting seat (421) and a first valve core seal (412) mounted on the first mounting seat (421); a first external thread (4211) is formed on at least part of the outer surface of the first mounting seat (421); and a first internal thread (141) matching the first external thread (4211) is formed on at least part of the hole wall of the first mounting hole (14); The second valve seat assembly (43) includes a second mounting seat (431) and a second valve core seal (413) mounted on the second mounting seat (431), a second external thread (4311) is formed on at least part of the outer surface of the second mounting seat (431), and a second internal thread (151) that cooperates with the second external thread (4311) is formed on at least part of the hole wall of the second mounting hole (15).

4. The switching valve (1) according to any one of claims 1 to 3, characterized in that: The multiple valve seat assemblies (3) also include a third valve seat assembly (44) and a fourth valve seat assembly (45), and the valve body (10) is also provided with a third mounting hole (16) and a fourth mounting hole (17) both of which are connected to the accommodating cavity (11), the third valve seat assembly (44) is fixed to the third mounting hole (16), and the fourth valve seat assembly (45) is fixed to the fourth mounting hole (17).

5. The switching valve (1) according to claim 4, characterized in that The axis of the third mounting hole (16) intersects with the axis of the fourth mounting hole (17).

6. The switching valve (1) according to claim 4 or 5, characterized in that: The axis of the first mounting hole (14) is perpendicular to the axis of the second mounting hole (15), the axis of the third mounting hole (16) is perpendicular to the axis of the fourth mounting hole (17), the first valve seat assembly (42) is opposite to the third valve seat assembly (44), and the second valve seat assembly (43) is opposite to the fourth valve seat assembly (45).

7. The switching valve (1) according to any one of claims 4 to 6, characterized in that: The third valve seat assembly (44) comprises a third mounting seat (441) and a third valve core seal (414) mounted on the third mounting seat (441), and the third mounting seat (441) is fixed to the third mounting hole (16); The fourth valve seat assembly (45) comprises a fourth mounting seat (451) and a fourth valve core seal (415) mounted on the fourth mounting seat (451), and the fourth mounting seat (451) is fixed to the fourth mounting hole (17).

8. The switching valve (1) according to claim 7, characterized in that At least one valve core flow channel (22) penetrating the valve core (2) is formed in the valve core (2); a third flow channel (4115) is formed on the third valve core sealing member (414); a fourth flow channel (4116) is formed on the fourth valve core sealing member (415); the third flow channel (4115) and the fourth flow channel (4116) are both capable of communicating with the valve core flow channel (22); The valve body (10) is also formed with a first valve body flow channel (18) and a second valve body flow channel (19); the first flow channel opening (183) of the first valve body flow channel is connected to the third flow channel (4115); the first flow channel opening (191) of the second valve body flow channel is connected to the fourth flow channel (4116); the second flow channel opening (184) of the first valve body flow channel and the second flow channel opening (192) of the second valve body flow channel are located on the same side of the valve body (10).

9. The switching valve (1) according to claim 8, characterized in that The first valve body flow channel (18) comprises a first section (181) and a second section (182), the central axis of the first section (181) is parallel to the central axis of the third through-flow channel (4115), and the first end of the first section (181) is connected to the third through-flow channel (4115), and the second end of the first section (181) intersects and is connected to the first end of the second section (182); The central axis of the second section (182) is arranged at an angle with the central axis of the first section (181), and the central axis of the first section (181) and the central axis of the second section (182) are both straight lines.

10. The switching valve (1) according to claim 9, characterized in that The second end of the first section (181) protrudes from the second section (182) toward the outside of the second section (182).

11. The switching valve (1) according to any one of claims 1 to 10, characterized in that: At least one valve core flow channel (22) penetrating the valve core (2) is formed in the valve core (2), and each of the valve seat assemblies (3) includes a valve core seal (40), and a flow channel (411) is provided on the valve core seal (40), and the flow channel (411) can be communicated with the valve core flow channel (22).

12. The switching valve (1) according to claim 11, characterized in that Part of the valve core (2) is located in the through-flow channel (411), and the channel wall of the through-flow channel (411) is arranged to be able to form a line contact with the outer surface of the valve core (2).

13. The switching valve (1) according to claim 12, characterized in that The flow channel (411) includes a tapered channel section (4111), and part of the valve core (2) is located in the tapered channel section (4111). Along the direction from the end of the tapered channel section (4111) away from the valve core (2) to the end of the tapered channel section (4111) close to the valve core (2), the area of ​​the radial cross-section of the tapered channel section (4111) gradually increases, so that the channel wall of the tapered channel section (4111) can form a linear contact with the outer surface of the valve core (2).

14. The switching valve (1) according to any one of claims 11 to 13, characterized in that: The valve core flow channel (22) comprises a first flow channel section (221) and a second flow channel section (222); the first flow channel section (221) and the second flow channel section (222) intersect and are interconnected; the central axis of the first flow channel section (221) is a straight line; the central axis of the second flow channel section (222) is a straight line; and the angle between the central axis of the first flow channel section (221) and the central axis of the second flow channel section (222) is an obtuse angle.

15. The switching valve (1) according to claim 14, characterized in that The angle between the central axis of the first flow channel section (221) and the central axis of the second flow channel section (222) is 108° to 120°.

16. The switching valve (1) according to any one of claims 11 to 15, characterized in that: The ratio of the volume of the valve core flow channel (22) to the volume of the valve core (2) is 0.21 to 0.

28.

17. The switching valve (1) according to any one of claims 11 to 16, characterized in that: There are multiple valve core flow channels (22), and the multiple valve core flow channels (22) include a first valve core flow channel (223) and a second valve core flow channel (224). The first valve core flow channel (223) and the second valve core flow channel (224) are respectively located on both sides of the longitudinal center plane (80) of the valve core (2).

18. The switching valve (1) according to any one of claims 1 to 17, characterized in that: A positioning protrusion (12) is provided on one of the valve core (2) and the valve body (10), and a positioning groove (21) is provided on the other of the valve core (2) and the valve body (10), the positioning protrusion (12) can extend into the positioning groove (21), and the cross-sectional area of ​​the positioning protrusion (12) is smaller than the cross-sectional area of ​​the positioning groove (21); The switching valve (1) further comprises a valve core base (30), wherein the valve core base (30) is located in the accommodating cavity (11) and is connected to the valve body (10), and the valve core base (30) is supported on the bottom of the valve core (2) and allows a gap to exist between the outer surface of the positioning protrusion (12) and the groove wall of the positioning groove (21).

19. The switching valve (1) according to claim 18, characterized in that The valve core base (30) has a support portion (31) in contact with the valve core (2), and the support portion (31) is configured to be able to form a line contact with the outer surface of the valve core (2).

20. The switching valve (1) according to claim 19, characterized in that The support portion (31) has a tapered surface (32), and the radial cross-sectional area of ​​the tapered surface (32) gradually increases along the direction from the end of the support portion (31) away from the valve core (2) to the end of the support portion (31) close to the valve core (2).

21. The switching valve (1) according to any one of claims 18 to 20, characterized in that: The positioning groove (21) comprises a main body section (211) and a gradually expanding section (212); the cross-sectional area of ​​the positioning protrusion (12) is smaller than the cross-sectional area of ​​the main body section (211); and the cross-sectional area of ​​the gradually expanding section (212) gradually increases along a direction from an end of the gradually expanding section (212) close to the main body section (211) to an end of the gradually expanding section (212) far from the main body section (211).

22. The switching valve (1) according to any one of claims 18 to 21, characterized in that: The valve body (10) is provided with a mounting groove (13) which is in communication with the accommodating chamber (11); the valve core base (30) is provided with an insertion portion (33), the insertion portion (33) is inserted into the mounting groove (13); the positioning protrusion (12) passes through the valve core base (30) and extends into the positioning groove (21).

23. The switching valve (1) according to any one of claims 1 to 22, characterized in that: The switching valve (1) further comprises a valve cover assembly (50), wherein the valve cover assembly (50) comprises a valve cover body (51), a valve cover mounting hole (53) communicating with the accommodating cavity (11) is formed on the valve body (10), the valve cover mounting hole (53) is configured to allow the valve core (2) to pass through, and the valve cover body (51) is mounted in the valve cover mounting hole (53); The switching valve (1) further comprises a driving rod (54); a first through hole (511) is formed on the valve cover body (51); the driving rod (54) passes through the first through hole (511) and is connected to the valve core (2); Part of the valve core (2) is located in the first through hole (511).

24. The switching valve (1) according to claim 23, characterized in that The valve cover assembly (50) further comprises a pressure cover (52), wherein the pressure cover (52) is mounted on a side of the valve cover body (51) away from the accommodating cavity (11), and a second through hole (521) is formed on the pressure cover (52) for the driving rod (54) to pass through, and the area of ​​the radial cross section of the second through hole (521) is smaller than the area of ​​the radial cross section of the first through hole (511).

25. A thermal management system (91), characterized in that: The invention comprises a switching valve (1) according to any one of claims 1 to 24.

26. A vehicle (90), characterized in that: Comprising the thermal management system (91) of claim 25.

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