Switching valve, thermal management system and vehicle

Abstract

The invention relates to a switching valve, a heat management system and a vehicle, the switching valve comprises a valve body, a valve element and a plurality of valve seat assemblies, a containing cavity is formed in the valve body, the valve element is rotatably contained in the containing cavity, the valve seat assemblies are all installed on the valve body and attached to the outer surface of the valve element, the valve seat assemblies comprise the first valve seat assembly and the second valve seat assembly, a first mounting hole and a second mounting hole which are communicated with the containing cavity are formed in the valve body, the first valve seat assembly is in threaded connection with the first mounting hole, and the second valve seat assembly is in threaded connection with the second mounting hole. According to the switching valve, the distance between the valve seat assembly and the valve element is adjustable, so that the requirement for the machining precision of the valve seat assembly can be lowered, the valve seat assembly is attached to the outer surface of the valve element by adjusting the position of the valve seat assembly, and therefore it is guaranteed that the valve seat assembly makes sealed contact with the valve element, and the cost for machining the valve seat assembly is lowered.

Description

Technical Field

[0001] The present disclosure relates to the technical field of switching valves, and more particularly, to a switching valve, a thermal management system, and a vehicle. Background Art

[0002] A switching valve is a control valve used to control the flow form and flow direction of a fluid, and is used to achieve the conduction, cut-off, and commutation of the fluid. The switching valve generally includes a valve body having a receiving cavity and a valve core rotatably disposed in the receiving cavity. Through the rotation of the valve core, the valve core flow passage in the valve core can be selectively communicated with the fluid pipeline connected to the switching valve. A valve seat assembly for sealing contact with the valve core is usually further disposed in the receiving cavity of the valve body. In order to prevent the fluid from leaking from the contact portion between the valve seat assembly and the valve core, the valve seat assembly needs to be closely attached to the outer surface of the valve core.

[0003] In the related art, in order to ensure that the valve seat assembly is closely attached to the outer surface of the valve core, at least one of the valve seat assembly, the valve core, and the valve body has a high processing accuracy requirement, resulting in a large processing difficulty and a high processing cost of the switching valve. Summary of the Invention

[0004] 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.

[0005] To achieve the above object, according to the first aspect of the present disclosure, there is provided a switching valve, including:

[0006] A valve body, internally provided with a receiving cavity;

[0007] A valve core, rotatably received in the receiving cavity;

[0008] A plurality of valve seat assemblies, all mounted on the valve body and attached to the outer surface of the valve core;

[0009] Wherein, the plurality of valve seat assemblies include a first valve seat assembly and a second valve seat assembly. The valve body is provided with a first mounting hole and a second mounting hole both communicating with the receiving 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.

[0010] Optionally, the axis of the first mounting hole intersects with the axis of the second mounting hole.

[0011] Optionally, the first valve seat assembly includes a first mounting seat and a first valve core seal member mounted on the first mounting seat. At least a part of the outer surface of the first mounting seat is formed with a first external thread, and at least a part of the hole wall of the first mounting hole is formed with a first internal thread that cooperates with the first external thread;

[0012] The second valve seat assembly includes a second mounting seat and a second valve core seal member mounted on the second mounting seat. At least a part of the outer surface of the second mounting seat is formed with a second external thread, and at least a part of the hole wall of the second mounting hole is formed with a second internal thread that mates with the second external thread.

[0013] Optionally, the plurality of valve seat assemblies further includes a third valve seat assembly and a fourth valve seat assembly. The valve body is further provided with a third mounting hole and a fourth mounting hole that are both in communication with the accommodation cavity. The third valve seat assembly is fixed in the third mounting hole, and the fourth valve seat assembly is fixed in the fourth mounting hole.

[0014] Optionally, the axis of the third mounting hole intersects with the axis of the fourth mounting hole.

[0015] 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.

[0016] Optionally, the third valve seat assembly includes a third mounting seat and a third valve core seal member mounted on the third mounting seat. The third mounting seat is fixed in the third mounting hole;

[0017] The fourth valve seat assembly includes a fourth mounting seat and a fourth valve core seal member mounted on the fourth mounting seat. The fourth mounting seat is fixed in the fourth mounting hole.

[0018] Optionally, at least one valve core flow channel penetrating the valve core is formed in the valve core. A third through-flow channel is formed on the third valve core seal member, and a fourth through-flow channel is formed on the fourth valve core seal member. Both the third through-flow channel and the fourth through-flow channel can be in communication with the valve core flow channel;

[0019] A first valve body flow channel and a second valve body flow channel are further formed on the valve body. A first flow port of the first valve body flow channel is in communication with the third through-flow channel, a first flow port of the second valve body flow channel is in communication with the fourth through-flow channel, and a second flow port of the first valve body flow channel and a second flow port of the second valve body flow channel are located on the same side of the valve body.

[0020] 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, and a first end of the first section is in communication with the third through-flow channel, and a second end of the first section intersects and communicates with a first end of the second section;

[0021] The central axis of the second section is arranged at an angle to the central axis of the first section, and both the central axis of the first section and the central axis of the second section are straight lines.

[0022] Optionally, the second end of the first section protrudes outward from the second section towards the outside of the second section.

[0023] Optionally, at least one valve core flow channel penetrating the valve core is formed in the valve core, each valve seat assembly includes a valve core seal, and a flow-through channel is arranged on the valve core seal, and the flow-through channel can communicate with the valve core flow channel.

[0024] Optionally, part of the valve core is located in the flow-through channel, and the channel wall of the flow-through channel is arranged to be able to form a line contact with the outer surface of the valve core.

[0025] Optionally, the flow-through channel includes a conical channel section, part of the valve core is located in the conical channel section, and along the direction from the end of the conical channel section far from the valve core to the end of the conical channel section close to the valve core, the area of the radial cross-section of the conical channel section gradually increases, so that the channel wall of the conical channel section can form a line contact with the outer surface of the valve core.

[0026] 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 communicate with 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 included 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.

[0027] Optionally, the included angle between the central axis of the first flow channel section and the central axis of the second flow channel section is 108° - 120°.

[0028] Optionally, the ratio of the volume of the valve core flow channel to the volume of the valve core is 0.21 - 0.28.

[0029] 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 central plane of the valve core.

[0030] Optionally, a positioning protrusion is arranged on one of the valve core and the valve body, a positioning groove is arranged 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;

[0031] The switching valve further includes a valve core base, which is located in the accommodation cavity and connected to the valve body. The valve core base supports the bottom of the valve core and provides a gap between the outer surface of the positioning protrusion and the groove wall of the positioning groove.

[0032] Optionally, the valve core base has a supporting portion in contact with the valve core, and the supporting portion is configured to form a line contact with the outer surface of the valve core.

[0033] Optionally, the supporting portion has a conical surface, and along the direction from the end of the supporting portion away from the valve core to the end of the supporting portion close to the valve core, the area of the radial cross-section of the conical surface gradually increases.

[0034] 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 along the direction from the 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, the cross-sectional area of the gradually expanding section gradually increases.

[0035] Optionally, an installation groove communicating with the accommodation cavity is provided on the valve body. The valve core base has an insertion portion, and the insertion portion is inserted into the installation groove. The positioning protrusion passes through the valve core base and extends into the positioning groove.

[0036] Optionally, the switching valve further includes a valve cover assembly. The valve cover assembly includes a valve cover body. A valve cover installation hole communicating with the accommodation cavity is formed on the valve body, and the valve cover installation hole is configured to allow the valve core to pass through. The valve cover body is installed in the valve cover installation hole;

[0037] 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;

[0038] Wherein, a part of the valve core is located in the first through-hole.

[0039] Optionally, the valve cover assembly further includes a gland, which is installed on the side of the valve cover body away from the accommodation cavity. A second through-hole for the driving rod to pass through is formed on the gland, and the area of the radial cross-section of the second through-hole is smaller than the area of the radial cross-section of the first through-hole.

[0040] According to the second aspect of the present disclosure, a thermal management system is provided, including the above-mentioned switching valve.

[0041] According to the third aspect of the present disclosure, a vehicle is provided, including the above-mentioned thermal management system.

[0042] Since the first mounting hole communicates with the accommodation 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, so that the first valve seat assembly approaches or moves away from the valve core. On the one hand, the position of the valve core in the valve body can be adjusted, and on the other hand, it is convenient to adjust the first valve seat assembly to a state where it can fit the outer surface of the valve core. Similarly, since the second mounting hole communicates with the accommodation 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, so that the second valve seat assembly approaches or moves away from the valve core. On the one hand, the position of the valve core in the valve body is adjusted, and on the other hand, it is convenient to adjust the second valve seat assembly to a state where it can fit the outer surface of the valve core.

[0043] That is to say, by adjusting the installation positions 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 distances between the first valve seat assembly and the second valve seat assembly and the valve core can be adjusted, ensuring that the first valve seat assembly and the second valve seat assembly can fit the outer surface of the valve core during the assembly process, thereby reducing the requirements for the machining accuracy of at least one of the valve seat assembly, the valve body, and the valve core, and reducing the processing cost of the switching valve.

[0044] In addition, as the switching valve is used, the contact positions of the first valve seat assembly and the second valve seat assembly with the valve core may be worn, resulting in poor sealing at the contact positions between the valve seat assembly and the valve core. For this situation, the distances of the first valve seat assembly and the second valve seat assembly relative to the valve core can also be adjusted to adjust the valve seat assembly to fit the outer surface of the valve core and eliminate the gaps at the contact positions between the valve seat assembly and the valve core.

[0045] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0046] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0047] Figure 1 is a schematic three-dimensional structure diagram of a switching valve provided by an embodiment of the present disclosure;

[0048] Figure 2 is a schematic side view of a switching valve provided by an embodiment of the present disclosure;

[0049] Figure 3 is along Figure 2 the cross-sectional view taken along line A-A in

[0050] Figure 4 is Figure 3 a partial enlarged schematic view at position C in

[0051] Figure 5 is a bottom view schematic of the switching valve provided by an embodiment of the present disclosure;

[0052] Figure 6 is a sectional view along the Figure 5 B - B line in

[0053] Figure 7 is Figure 6 a partial enlarged schematic view at position D in

[0054] Figure 8 is Figure 6 a partial enlarged schematic view at position E in

[0055] Figure 9 is a three - dimensional structural schematic of the valve core base of the switching valve provided by an embodiment of the present disclosure;

[0056] Figure 10 is a three - dimensional structural schematic of the valve core provided by an embodiment of the present disclosure;

[0057] Figure 11 is a sectional view schematic of the valve core provided by an embodiment of the present disclosure;

[0058] Figure 12 is Figure 11 a partial enlarged schematic view at position F in

[0059] Figure 13 is Figure 11 a partial enlarged schematic view at position G in

[0060] Figure 14 is a three - dimensional structural schematic of the valve core provided by another embodiment of the present disclosure;

[0061] Figure 15 is a sectional view schematic of the valve core provided by another embodiment of the present disclosure;

[0062] Figure 16 is Figure 15 a partial enlarged schematic view at position H in

[0063] Figure 17 is Figure 11 a partial enlarged schematic view at position I in

[0064] Figure 18 is a three - dimensional structural schematic of the valve seat assembly provided by an embodiment of the present disclosure;

[0065] Figure 19It is a cross-sectional schematic view of a valve seat assembly provided by an embodiment of the present disclosure;

[0066] Figure 20 It is a three-dimensional structural schematic view of a valve seat assembly provided by another embodiment of the present disclosure;

[0067] Figure 21 It is a cross-sectional schematic view of a valve seat assembly provided by another embodiment of the present disclosure;

[0068] Figure 22 is Figure 21 a partial enlarged schematic view at position J in

[0069] Explanation of reference numerals

[0070] 1 - switching valve; 2 - valve core; 3 - valve seat assembly; 4 - mounting seat; 5 - valve body flow channel; 6 - second clamping groove; 7 - sealing ring; 10 - valve body; 11 - accommodating cavity; 12 - positioning protrusion; 13 - mounting groove; 14 - first mounting hole; 15 - second mounting hole; 16 - third mounting hole; 17 - fourth mounting hole; 18 - first valve body flow channel; 181 - first section; 182 - second section; 19 - second valve body flow channel; 20 - core body; 21 - positioning groove; 211 - main body section; 212 - gradually expanding section; 22 - valve core flow channel; 221 - first flow channel section; 2211 - first flow channel side wall; 2212 - first transition connection wall; 22121 - first connection side wall; 22122 - first connection end wall; 2213 - first through-flow port; 222 - second flow channel section; 2221 - second flow channel side wall; 2222 - second transition connection wall; 22221 - second connection side wall; 22222 - second connection end wall; 2223 - second through-flow port; 223 - first valve core flow channel; 224 - second valve core flow channel; 23 - first groove; 231 - first notch; 24 - second groove; 241 - second notch; 25 - first through-flow space; 26 - second through-flow space; 27 - drive groove; 271 - open end; 30 - valve core base; 31 - support portion; 32 - tapered surface; 33 - insertion portion; 34 - main body portion; 40 - valve core seal; 41 - seal body; 411 - through-flow channel; 4111 - tapered channel section; 4112 - cylindrical channel section; 4113 - first through-flow channel; 4114 - second through-flow channel; 4115 - third through-flow channel; 4116 - fourth through-flow channel; 412 - first valve core seal; 413 - second valve core seal; 414 - third valve core seal; 415 - fourth valve core seal; 416 - end face of the second end of the seal body; 42 - first valve seat assembly; 421 - first mounting seat; 4211 - first external thread; 43 - second valve seat assembly; 431 - second mounting seat; 4311 - second external thread; 44 - third valve seat assembly; 441 - third mounting seat; 45 - fourth valve seat assembly; 451 - fourth mounting seat; 46 - first clamping groove; 47 - clamping hole; 48 - fluid channel; 481 - first fluid channel; 482 - second fluid channel; 49 - abutting portion; 491 - end face of the end of the abutting portion away from the mounting seat; 50 - valve cover assembly; 51 - valve cover body; 511 - first through-hole; 52 - gland; 521 - second through-hole; 53 - valve cover mounting hole; 54 - drive rod; 70 - chamfer; 71 - kink portion; 72 - gap; 80 - longitudinal center plane; 81 - angular bisector. Detailed implementation manners

[0071] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0072] In this disclosure, unless otherwise stated, the orientation terms such as "upper (top), lower (bottom)" are usually defined with respect to the drawing direction of the corresponding drawings, and specific reference may be made to Figure 6 as shown, and "inner, outer" refer to the inside and outside of the contour of the corresponding component. In addition, the terms "first", "second", etc. used are to distinguish one element from another and do not have an order or importance.

[0073] In the description of this disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "connected", "linked", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0074] As Figures 1 to 22 shown, this disclosure provides a switching valve 1, which includes a valve body 10, a valve core 2, and a valve seat assembly 3. An accommodation cavity 11 is arranged inside the valve body 10. The valve core 2 is rotatably accommodated in the accommodation cavity 11. The valve seat assembly 3 is installed on the valve body 10 and fits against the outer surface of the valve core 2. By rotating the valve core 2, the valve core flow channel 22 inside the valve core 2 can be communicated with or cut off from the fluid pipeline connected to the switching valve 1. The switching valve 1 provided by this disclosure can be a reversing valve such as a three-way valve, a four-way valve, a five-way valve, etc. This disclosure does not limit the specific type of the switching valve 1.

[0075] To facilitate understanding of the switching valve 1 provided by this disclosure, the overall structure of the switching valve 1 will be introduced first below, and then the valve core 2, the valve core seal 40, and the valve seat assembly 3 in the switching valve 1 will be described in detail.

[0076] Switching valve 1

[0077] As Figure 3 , Figure 4 , Figure 6 and Figures 18 to 22 shown, the switching valve 1 provided by this disclosure includes a plurality of valve seat assemblies 3. The plurality of valve seat assemblies 3 are all installed on the valve body 10 and fit against the outer surface of the valve core 2. Among them, the plurality of valve seat assemblies 3 include at least one first valve seat assembly 42 (as Figure 3 shown). A first mounting hole 14 communicating with the accommodation cavity 11 is provided on the valve body 10. A valve seat assembly 42 is threadedly connected to the first mounting hole 14.

[0078] Since the first mounting hole 14 communicates with the accommodation 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 axially along the first mounting hole 14, so that the first valve seat assembly 42 approaches or moves 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 the outer surface of the valve core 2.

[0079] The plurality of valve seat assemblies 3 may further include at least one second valve seat assembly 43 (as Figure 3 shown), and a second mounting hole 15 communicating with the accommodation cavity 11 is provided on the valve body 10, and the second valve seat assembly 43 is threadedly connected to the second mounting hole 15.

[0080] Similarly, since the second mounting hole 15 communicates with the accommodation 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 axially along the second mounting hole 15, so that the second valve seat assembly 43 approaches or moves 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, it is convenient to adjust the second valve seat assembly 43 to a state where it can fit the outer surface of the valve core 2.

[0081] That is to say, by adjusting the installation positions 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, so as to ensure that the first valve seat assembly 42 and / or the second valve seat assembly 43 can fit the outer surface of the valve core 2 during the assembly process, thereby reducing the requirements for the machining 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.

[0082] In addition, as the switching valve 1 is used, the contact positions of the first valve seat assembly 42 and / or the second valve seat assembly 43 with the valve core 2 may be worn, resulting in a situation where the contact position between the valve seat assembly 3 and the valve core 2 is not tightly sealed. For this situation, the distance of the first valve seat assembly 42 and / or the second valve seat assembly 43 relative to the valve core 2 can also 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 at the contact position between the valve seat assembly 3 and the valve core 2.

[0083] It can be understood that the threaded connection between the first valve seat assembly 42 and the first mounting hole 14 has a self-locking ability, that is, the first valve seat assembly 42 will not move axially along the first mounting hole 14 when being abutted by the valve core 2. The threaded connection between the second valve seat assembly 43 and the second mounting hole 15 has a self-locking ability, that is, the second valve seat assembly 43 will not move axially along the second mounting hole 15 when being abutted by the valve core 2. In addition, the numbers 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 the present disclosure does not limit this.

[0084] For the embodiment in which the valve seat assembly 3 includes the first valve seat assembly 42 and the second valve seat assembly 43, as an implementation manner, as Figure 3 shown, 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 adjust the position of the valve core 2 in the accommodating cavity 11 in the intersecting directions. For example, the valve core 2 is adjusted to the center of the accommodating cavity 11, reducing the eccentric wear of the valve core 2 on the valve seat assembly 3, which is beneficial to the sealing contact between the valve core 2 and the valve seat assembly 3.

[0085] In other implementation manners, the axis of the first mounting hole 14 and the axis of the second mounting hole 15 can also be arranged to be parallel to each other.

[0086] To realize the threaded connection between the first valve seat assembly 42 and the first mounting hole 14 and the sealing contact with the valve body 10, and the threaded connection between the second valve seat assembly 43 and the second mounting hole 15 and the sealing contact with the valve body 10, as an implementation manner, as Figure 3 shown, 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. At least part of the outer surface of the first mounting seat 421 is formed with a first external thread 4211, and at least part of the hole wall of the first mounting hole 14 is formed with a first internal thread that cooperates with the first external thread 4211. 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. At least part of the outer surface of the second mounting seat 431 is formed with a second external thread 4311, and at least part of the hole wall of the second mounting hole 15 is formed with a second internal thread that cooperates with the second external thread 4311.

[0087] By threadedly connecting the first mounting seat 421 to the first mounting hole 14, the first valve core seal 412 mounted on the first mounting seat 421 can be axially movably mounted on the valve body 10 along the first mounting hole 14. Similarly, by threadedly connecting the second mounting seat 431 to the second mounting hole 15, the second valve core seal 413 mounted on the second mounting seat 431 can be axially movably mounted on the valve body 10 along the first mounting hole 14.

[0088] The first valve seat assembly 42 is in sealing contact with the valve core 2 through the first valve core seal 412, which is beneficial to improving the sealing effect on the valve core 2, and the first valve core seal 412 is convenient to replace after wear. Similarly, the second valve seat assembly 43 is in sealing contact with the valve core 2 through the first valve core seal 412, which is beneficial to improving the sealing effect on the valve core 2, and the second valve core seal 413 is convenient to replace after wear.

[0089] As Figure 3 shown, the plurality of valve seat assemblies 3 may further include a third valve seat assembly 44 and a fourth valve seat assembly 45, and the valve body 10 is further provided with a third mounting hole 16 and a fourth mounting hole 17 both communicating with the accommodation cavity 11. The third valve seat assembly 44 is fixed in the third mounting hole 16, and the fourth valve seat assembly 45 is fixed in the fourth mounting hole 17.

[0090] In other words, a part of the valve seat assemblies (i.e., the first valve seat assembly 42 and the second valve seat assembly 43) in the plurality of valve seat assemblies 3 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 the part of the valve seat assemblies 3 that are threadedly connected to the valve body 10 so that it can be in sealing contact with all the plurality of valve seat assemblies 3. Such a setting further reduces the manufacturing cost of the switching valve 1.

[0091] 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. The present disclosure does not limit this.

[0092] The present disclosure does not limit the specific positions of the third mounting hole 16 and the fourth mounting hole 17. As an implementation manner, as Figure 3 shown, the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 can be intersectingly arranged, that is, the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 can be non-parallel arranged. As another implementation manner, the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 can also be parallel to each other.

[0093] Optionally, as Figure 3As shown, the axis of the first mounting hole 14 and the axis of the second mounting hole 15 can be perpendicular to each other, the axis of the third mounting hole 16 and the axis of the fourth mounting hole 17 can 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 is opposite to the third valve seat assembly 44, 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, and since the second valve seat assembly 43 is opposite to the fourth valve seat assembly 45, 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, thereby adjusting the positions of the first valve seat assembly 42 and the second valve seat assembly 43, so that 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.

[0094] 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.

[0095] To achieve the fixing 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 fixing of the fourth valve seat assembly 45 and the third mounting hole 16 and the sealing contact with the valve body 10, as an implementation mode, as shown in FIG. Figure 3 As shown, 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. 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.

[0096] The third valve core seal 414 can be installed on the valve body 10 through the third mounting seat 441, and the third valve seat assembly 44 is in sealing contact with the valve core 2 through the third valve core seal 414, which is conducive to improving the sealing effect of the valve core 2, and the third valve core seal 414 is easy to replace after being worn. Similarly, the fourth valve core seal 415 can be installed on the valve body 10 through the fourth mounting seat 451, and the fourth valve seat assembly 45 is in sealing contact with the valve core 2 through the fourth valve core seal 415, which is conducive to improving the sealing effect of the valve core 2, and the fourth valve core seal 415 is easy to replace after being worn.

[0097] Alternatively, if Figure 3 , Figure 4 and Figure 6As shown, at least one valve core flow channel 22 penetrating through the valve core 2 is formed inside the valve core 2. Each valve seat assembly 3 includes a valve core seal 40. A flow-through channel 411 is provided on the valve core seal 40, and the flow-through channel 411 can communicate 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-through channel 411.

[0098] As an exemplary embodiment provided by the present disclosure, as Figure 3 shown, a first flow-through channel 4113 is formed on the first valve core seal 412, and a second flow-through channel 4114 is formed on the second valve core seal 413. Both the first flow-through channel 4113 and the second flow-through channel 4114 can communicate with the valve core flow channel 22. A first fluid channel 481 is further formed on the first mounting seat 421. The first end of the first fluid channel 481 communicates with the first flow-through channel 4113. A second fluid channel 482 is further formed on the second mounting seat 431. The first end of the second fluid channel 482 communicates with the second flow-through channel 4114. The second ends of the first fluid channel 481 and the second fluid channel 482 are used to communicate with different fluid pipelines outside the switching valve 1.

[0099] A third flow-through channel 4115 is formed on the third valve core seal 414, and a fourth flow-through channel 4116 is formed on the fourth valve core seal 415. Both the third flow-through channel 4115 and the fourth flow-through channel 4116 can communicate with the valve core flow channel 22. A first valve body flow channel 18 and a second valve body flow channel 19 are further formed on the valve body 10. The first flow port of the first valve body flow channel 18 communicates with the third flow-through channel 4115, and the first flow port of the second valve body flow channel 19 communicates with the fourth flow-through 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.

[0100] As Figure 3 shown, by rotating the valve core 2, the two ends of the valve core flow channel 22 can be respectively communicated with the first flow-through channel 4113 and the second flow-through channel 4114, or the two ends of the valve core flow channel 22 can be respectively communicated with the third flow-through channel 4115 and the fourth flow-through channel 4116, or the two ends of the valve core flow channel 22 can be respectively communicated with the first flow-through channel 4113 and the fourth flow-through channel 4116, or the two ends of the valve core flow channel 22 can be respectively communicated with the third flow-through channel 4115 and the second flow-through channel 4114.

[0101] Optionally, the second flow port of the first valve body flow channel 18 and the second flow port of the second valve body flow channel 19 are located on the same side of the valve body 10, allowing the operator to connect the second flow port of the first valve body flow channel 18 and the second flow port of the second valve body flow channel 19 to different external pipelines without rotating the valve body 10, facilitating the connection between the external pipelines and the switching valve 1. In addition, for the application scenario where the switching valve 1 is applied to the vehicle thermal management system, the fact that the second flow port of the first valve body flow channel 18 and the second flow port of the second valve body flow channel 19 are located on the same side of the valve body 10 also facilitates the installation of the switching valve 1 into the limited installation space of the vehicle.

[0102] To achieve that the second flow port of the first valve body flow channel 18 and the second flow port of the second valve body flow channel 19 are located on the same side of the valve body 10, as an implementation manner, as Figure 3 shown, 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 through-flow channel 4115, and the first end of the first section 181 communicates with the third through-flow channel 4115. The second end of the first section 181 intersects and communicates with 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 (i.e., the central axis of the second section 182 is not parallel to the central axis of the first section 181), and both the central axis of the first section 181 and the central axis of the second section 182 are straight lines.

[0103] In this way, the second end of the second section 182 and the second flow port of the second valve body flow channel 19 can be located on the same side of the valve body 10, that is, the second flow port of the first valve body flow channel 18 and the second flow port of the second valve body flow channel 19 can be located on the same side of the valve body 10.

[0104] Since it is difficult for a conventional drilling tool (such as a cylindrical drill bit) to pass through the second section 182 to process the first section 181 when the first section 181 and the second section 182 are arranged at an angle, therefore, optionally, as Figure 3 shown, 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 a conventional drilling tool can pass through the first mounting hole 14 and the accommodation cavity 11 to process the first section 181.

[0105] To ensure that there is sufficient flow area at the connection between the first section 181 and the second section 182, as an implementation manner, as Figure 3As shown, the second end of the first section 181 protrudes outward from the second section 182 towards the outside of the second section 182. When processing the first section 181, the second end of the first section 181 can be processed to protrude from the second section 182, so as to ensure that there is sufficient flow area at the connection between the first section 181 and the second section 182. Moreover, a larger space can be provided at the bend 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 bend of the first valve body flow channel 18.

[0106] In addition, in order to reduce the resistance of the valve core seal 40 on the valve core 2 during the rotation of the valve core 2, as an implementation manner, part of the valve core 2 is located in the flow passage 411, and the channel wall of the flow passage 411 is arranged to be able to form a line contact with the outer surface of the valve core 2. By forming a line contact between the channel wall of the flow passage 411 and the outer surface of the valve core 2, on the one hand, the gap at the connection between the valve core flow passage 22 in the valve core 2 and the flow passage 411 in the valve core seal 40 can be sealed, and on the other hand, there can be a smaller contact area between the valve core seal 40 and the valve core 2, reducing the resistance of the valve core seal 40 on the valve core 2 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.

[0107] The present disclosure does not limit the specific structure of the above-mentioned flow passage 411. As an implementation manner, as Figures 19 to 21 shown, the flow passage 411 includes a tapered channel section 4111. 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 far 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 line contact with the outer surface of the valve core 2.

[0108] Along the axial direction of the tapered channel section 4111, any position of the channel wall of the tapered channel section 4111 can be used to form a line contact with the outer surface of the valve core 2. Therefore, the manufacturing precision requirements for the valve core seal 40 and the valve core 2 can be reduced, thereby reducing the manufacturing cost.

[0109] As another implementation manner, the flow passage 411 can also include a flared channel section. For example, the two sides of the axial cross-section of the flared channel section are arc-shaped. Part of the valve core 2 is located in the flared channel section. Along the direction from the end of the flared channel section far from the valve core 2 to the end of the flared channel section close to the valve core 2, the area of the radial cross-section of the flared channel section gradually increases, so that the channel wall of the flared channel section can form a line contact with the outer surface of the valve core 2.

[0110] Optionally, as Figure 11 and Figure 15As shown, 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 communicate with 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.

[0111] 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 axes of both the first flow channel section 221 and the second flow channel section 222 are straight lines, it is convenient for processing the valve core flow channel 22. For example, a punching tool (such as a cylindrical drill bit) can be used to punch holes in the core body 20 along a straight line to separately process the first flow channel section 221 and the second flow channel section 222, and make the first flow channel section 221 and the second flow channel section 222 intersect and communicate with each other, so that the valve core flow channel 22 penetrating the core body 20 is jointly formed by 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 convenient to process, which is beneficial to reducing the production cost of the valve core 2.

[0112] Optionally, the included 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.

[0113] In addition, since the included 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.

[0114] The included angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 described above can be configured as any suitable angle. As an implementation manner, the included 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° - 120°, so that the flow resistance of the valve core flow channel 22 to the fluid is relatively small.

[0115] The volume ratio of the valve core flow channel 22 of the present disclosure to the volume of the core body 20 can be configured as any suitable ratio, and the present disclosure does not limit this. As an implementation manner, the volume ratio 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 has a relatively large flow area.

[0116] Optionally, as Figure 11 and Figure 15 shown, there can be multiple valve core flow channels 22. The multiple valve core flow channels 22 include a first valve core flow channel 223 and a second valve core flow channel 224, and the first valve core flow channel 223 and the second valve core flow channel 224 are respectively located on both sides of the longitudinal central plane 80 of the valve core 2. Here, the longitudinal central plane 80 of the valve core 2 refers to the plane passing through the center of the valve core 2 along the vertical direction, as Figure 11 and Figure 15 shown.

[0117] The first spool flow channel 223 and the second spool flow channel 224 are respectively located on both sides of the longitudinal center plane 80 of the spool 2, which can make the first spool flow channel 223 and the second spool flow channel 224 not exceed the center of the spool 2 and maintain a certain distance from the center of the spool 2, thereby being beneficial to reducing the influence on the structural strength of the spool 2 caused by opening the spool flow channel 22.

[0118] In addition, in order to facilitate the positioning between the spool 2 and the valve body 10, as an implementation manner, as Figure 6 and Figure 7 shown, a positioning protrusion 12 is provided on one of the spool 2 and the valve body 10, and a positioning groove 21 is provided on the other of the spool 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.

[0119] During the installation process of the spool 2 and the valve body 10, the approximate positioning between the spool 2 and the valve body 10 can be achieved by inserting the positioning protrusion 12 into the positioning groove 21, which is simple and convenient. In addition, since the cross-sectional area of the positioning protrusion 12 is set to be smaller than the cross-sectional area of the positioning groove 21, after the centering adjustment of the spool 2 and the valve body 10 is completed, there can be a gap between the circumferential side of the positioning protrusion 12 and the positioning groove 21, thereby being able to reduce the rotational resistance of the valve body 10 to the spool 2.

[0120] Optionally, the positioning protrusion 12 on the valve body 10, or the positioning groove 21 on the valve body 10 can be located at the bottom of the valve body 10.

[0121] 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 implementation manner, as Figure 6 and Figure 7 shown, the switching valve 1 further includes a spool base 30. The spool base 30 is located in the accommodation cavity 11 and connected to the valve body 10. The spool base 30 supports the bottom of the spool 2 and makes there be a gap between the outer surface of the positioning protrusion 12 and the groove wall of the positioning groove 21.

[0122] In order to reduce the resistance of the spool 2 during the rotation process by the spool base 30, as an implementation manner, as Figure 7 and Figure 9As shown, 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. 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 to make the valve core 2 located at the center of the accommodation cavity 11. On the other hand, it can make the contact area between the valve core base 30 and the valve core 2 smaller, reduce the resistance of the valve core base 30 to the valve core 2 during the rotation of the valve core 2, reduce the influence of the valve core base 30 on the rotation of the valve core 2, and improve the switching speed of the switching valve 1.

[0123] The present disclosure does not limit the specific structure of the above support portion 31. As an implementation manner, as Figure 7 and Figure 9 shown, the support portion 31 has a conical surface 32. 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, the area of the radial cross-section of the conical surface 32 gradually increases, and the outer surface of the valve core 2 can form a line contact with the conical surface 32. Here, the valve core base 30 may have the same structure as the valve seat assembly 3 in this article in terms of structure, or may have the same structure as the valve core seal 40 in this article. That is to say, the valve core seal 40 can be used as the valve core base 30, and the channel wall of the conical 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.

[0124] As another implementation manner, the support portion 31 has an arc surface. 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, the area of the radial cross-section of the arc surface gradually increases, and the outer surface of the valve core 2 can form a line contact with the arc surface.

[0125] In order to make the positioning protrusion 12 easier to insert into the positioning groove 21, as an implementation manner, as Figure 7 shown, the positioning groove 21 includes 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. Along the direction from the end of the gradually expanding section 212 close to the main body section 211 to the end of the gradually expanding section 212 away from the main body section 211, the cross-sectional area of the gradually expanding section 212 gradually increases. During the process of inserting the positioning protrusion 12 into the positioning groove 21, through the avoidance of the gradually expanding section 212 for the end of the positioning protrusion 12, the positioning protrusion 12 can be more easily inserted into the main body section 211.

[0126] In order to facilitate the disassembly and assembly between the above valve core base 30 and the valve body 10, as an implementation manner, as Figure 6 and Figure 7As shown, an installation groove 13 communicating with the accommodation cavity 11 is provided on the valve body 10. The valve core base 30 has an insertion portion 33. The insertion portion 33 is inserted into the installation 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 first inserted into the installation groove 13, and then the valve core 2 can be installed in the accommodation cavity 11, so that the valve core base 30 is clamped between the valve core 2 and the valve body 10 to complete the installation of the valve core base 30. Moreover, only by taking out the valve core 2 from the accommodation cavity 11, the insertion portion 33 of the valve core base 30 can be taken out from the installation groove 13 to replace the valve core base 30, which is very convenient.

[0127] In addition, in order to facilitate the installation of the valve core 2, as an implementation manner, as Figure 6 and Figure 8 shown, 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 installation hole 53 communicating with the accommodation cavity 11 is formed on the valve body 10. The valve cover installation hole 53 is configured to allow the valve core 2 to pass through. The valve cover body 51 is installed in the valve cover installation hole 53. The switching valve 1 further includes 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. That is to say, when installing the valve core 2, the valve core 2 can be first placed into the accommodation cavity 11 through the valve cover installation hole 53, then the driving rod 54 can be connected to the valve core 2, and finally the valve cover body 51 can be installed in the valve cover installation hole 53 and the driving rod 54 can be made to pass through the first through hole 511. Or, the valve core 2 can be first placed into the accommodation cavity 11 through the valve cover installation hole 53, then the valve cover body 51 can be installed in the valve cover installation hole 53, and finally the driving rod 54 can be connected to the valve core 2 and the driving rod 54 can be made to pass through the first through hole 511.

[0128] Optionally, as Figure 6 shown, a part of the valve core 2 can be located in the first through hole 511. That is, the valve core 2 can be accommodated by the first through hole 511 and the accommodation cavity 11 together, which is beneficial to reducing the overall volume of the switching valve 1.

[0129] In order to improve the sealing performance of the accommodation cavity 11, as an implementation manner, as Figure 6 and Figure 8As shown, the valve cover assembly 50 further includes a gland 52, which is installed on the side of the valve cover body 51 away from the accommodating cavity 11. A second through hole 521 for the driving rod 54 to pass through is formed on the gland 52, and the area of the radial cross-section of the second through hole 521 is smaller than that of the radial cross-section of the first through hole 511. Since the area of the radial cross-section of the second through hole 521 is smaller than that of the radial cross-section of the first through hole 511, after the valve cover body 51 is installed in the valve cover mounting hole 53, the driving rod 54 can be passed through the second through hole 521, and the gland 52 can be installed on the side of the valve cover body 51 away from the accommodating cavity 11, thereby reducing the gap between the first through hole 511 and the driving rod 54, and further improving the sealing performance of the cavity.

[0130] Valve core 2

[0131] As Figures 10 to 17 shown, the present disclosure also provides a valve core 2 of a switching valve 1, which includes a core body 20 and at least one valve core flow channel 22 penetrating the core body 20. As mentioned above, 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 communicate with each other, and the central axes of both the first flow channel section 221 and the second flow channel section 222 are straight lines.

[0132] 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 axes of both the first flow channel section 221 and the second flow channel section 222 are straight lines, it is convenient for processing the valve core flow channel 22. For example, a punching tool (such as a cylindrical drill bit) can be used to punch holes in the core body 20 along a straight line to respectively process the first flow channel section 221 and the second flow channel section 222, and make the first flow channel section 221 and the second flow channel section 222 intersect and communicate with each other, so as to jointly form the valve core flow channel 22 penetrating the core body 20 through the first flow channel section 221 and the second flow channel section 222.

[0133] The included 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.

[0134] In addition, since the included 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.

[0135] The included angle between the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222 described above can be constructed as any suitable angle. As an implementation manner, the included 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 flow resistance of the valve core flow channel 22 to the fluid is small.

[0136] In order to enable the first flow channel section 221 and the second flow channel section 222 to intersect and communicate with each other, as an implementation manner, 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 further has a first transition connection wall 2212, the first transition connection 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, and the first transition connection wall 2212 protrudes outward from the second flow channel side wall 2221 toward the outside of the second flow channel section 222.

[0137] As another implementation manner, referring to Figure 15 and Figure 16 As shown in the figure, 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 second flow channel section 222 further has a second transition connection wall 2222, the second transition connection 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, and the second transition connection wall 2222 protrudes outward from the first flow channel side wall 2211 toward the outside of the first flow channel section 221.

[0138] As yet another implementation manner, as shown in Figure 11 and Figure 12 As shown in the figure, 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 further has a first transition connection wall 2212, the first transition connection 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 connection wall 2212 protrudes outward from the second flow channel side wall 2221 toward the outside of the second flow channel section 222, the second flow channel section 222 further has a second transition connection wall 2222, the second transition connection 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, and the second transition connection wall 2222 protrudes outward from the first flow channel side wall 2211 toward the outside of the first flow channel section 221.

[0139] When machining the valve core flow channel 22, one end of the first flow channel section 221 close to the second flow channel section 222 can be machined to protrude from the second flow channel side wall 2221 of the second flow channel section 222, so as to form the above-mentioned first transition connection wall 2212, enabling the first flow channel section 221 and the second flow channel section 222 to intersect and communicate with each other, and ensuring that the connection part between the first flow channel and the second flow channel has sufficient flow area; and / or, one end of the second flow channel section 222 close to the first flow channel section 221 can be machined to protrude from the first flow channel side wall 2211 of the first flow channel section 221, so as to form the second transition connection wall 2222, enabling the first flow channel section 221 and the second flow channel section 222 to intersect and communicate with each other, and ensuring that the connection part between the first flow channel and the second flow channel has sufficient flow area.

[0140] In addition, the first transition connection wall 2212 protruding outwards from the second flow channel side wall 2221, and / or the second transition connection wall 2222 protruding outwards from the first flow channel side wall 2211, can increase the space at the bend of the valve core flow channel 22, reduce the resistance of the bend of the valve core flow channel 22 to fluid flow, and reduce the impact and wear of the fluid on the bend of the valve core flow channel 22. It can be 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.

[0141] For the embodiment in which the second flow channel section 222 has the second transition connection wall 2222, as Figure 16 shown, the second transition connection wall 2222 can include a second transition connection side wall and a second transition connection end wall perpendicular to the second transition connection side wall. The extending direction of the second transition connection side wall is the same as that of the second flow channel side wall 2221. One end of the second transition connection side wall is connected to the second flow channel side wall 2221, the other end of the second transition connection side wall is connected to one end of the second transition connection end wall, and the other end of the second transition connection end wall is connected to the first flow channel side wall 2211.

[0142] When opening the first flow channel section 221 and the second flow channel section 222 by a punching tool, the first flow channel section 221 can be opened first, and then the second flow channel section 222 can be opened. The opening length of the second flow channel section 222 can be greater than that of the first flow channel section 221, so as to form the above-mentioned second transition connection wall 2222 and realize the intersection and connection of the first flow channel section 221 and the second flow channel section 222. That is to say, the second transition connection wall 2222 can be formed when the punching tool opens the second flow channel section 222. By opening the first flow channel section 221 and the second flow channel section 222 in a straight line direction with the punching tool, the first flow channel section 221 and the second flow channel section 222 can intersect and communicate.

[0143] For the embodiment in which the first flow channel section 221 has the first transition connection wall 2212 and the second flow channel section 222 has the second transition connection wall 2222, asFigure 12 As shown, the first transition connection wall 2212 includes a first connection side wall 22121 and a first connection end wall 22122 perpendicular to the first connection side wall 22121. The extending direction of the first connection side wall 22121 is the same as that of the first flow channel side wall 2211. The second transition connection wall 2222 includes a second connection side wall 22221 and a second connection end wall 22222 perpendicular to the second connection side wall 22221. The extending direction of the second connection side wall 22221 is the same as that of the second flow channel side wall 2221. The first connection end wall 22122 is connected to at least a part of the second flow channel side wall 2221, and the second connection end wall 22222 is connected to at least a part of the first flow channel side wall 2211. One end of the first connection side wall 22121 away from the first connection end wall 22122 is connected to one end of the second connection side wall 22221 away from the second connection end wall 22222.

[0144] When the first flow channel section 221 and the second flow channel section 222 are opened by a punching tool, at least a part of the valve core flow channel wall 22 of the first flow channel section 221 and at least a part of the valve core flow channel wall 22 of the second flow channel section 222 can be crossed. For example, Figure 12 As shown, they are crossed in an "X" shape, thereby forming the above-mentioned first transition connection wall 2212 and second transition connection wall 2222, and realizing the intersection and connection of the first flow channel section 221 and the second flow channel section 222. That is to say, the first transition connection wall 2212 and the second transition connection wall 2222 can be formed when the punching tool opens the second flow channel section 222. By opening the first flow channel section 221 and the second flow channel section 222 in a straight line direction with the punching tool, the first flow channel section 221 and the second flow channel section 222 can intersect and be connected.

[0145] Here, the opening length of the first flow channel section 221 and the opening length of the second flow channel section 222 can be the same or different, and the present disclosure does not limit this.

[0146] In addition, in different working states of the switching valve 1, the fluid may flow through the valve core flow channel 22 in different flow directions. In order to make the flow resistance of the fluid in different flow directions at the bend of the valve core flow channel 22 (i.e., the intersection of the first flow channel section 221 and the second flow channel section 222) be approximately the same. As an implementation manner, as Figure 11 and Figure 12 shown, the first transition connection wall 2212 and the second transition connection wall 2222 can be symmetric about the angular bisector 81 of the included angle formed by the central axis of the first flow channel section 221 and the central axis of the second flow channel section 222, which can make the flow resistance of the fluid in different flow directions at the bend of the valve core flow channel 22 be approximately the same.

[0147] In order to make the flow resistance of the fluid in different flow directions flowing in the valve core flow channel 22 be approximately the same. As an implementation manner, asFigure 16 As shown, the first flow channel side wall 2211 defines a first flow space 25, and the second flow channel side wall 2221 defines a second flow space 26, and the area of ​​the radial cross section of the first flow space 25 can be equal to the area of ​​the radial cross section of the second flow space 26. Since the area of ​​the radial cross section of the first flow space 25 is equal to the area of ​​the radial cross section of the second flow space 26, the resistance encountered by the fluid flowing through the first flow space 25 and then through the second flow space 26 is substantially the same as the resistance encountered by the fluid flowing through the second flow space 26 and then through the first flow space 25, so that the resistance encountered by the fluids in different flow directions in the valve core flow channel 22 can be substantially the same.

[0148] 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 / the 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 / the second flow channel).

[0149] In addition, when processing the valve core flow channel 22, in order to facilitate the drilling and positioning of the drilling tool, as an implementation method, Figure 10 , Figure 11 and Figure 13 As shown, a first groove 23 and a second groove 24 are formed on the core 20 , the first flow channel section 221 has a first flow opening 2213 , 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 .

[0150] Before the first flow channel section 221 and the second flow channel section 222 are opened by the punching tool, the first groove 23 and the second groove 24 are opened on the core body 20, and then the first flow channel section 221 is opened from the bottom wall of the first groove 23, and the second flow channel section 222 is opened from the bottom wall of the second groove 24, so that 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, which can improve the positioning speed of the punching tool when processing the valve core flow channel 22, thereby improving the processing efficiency of the valve core flow channel 22.

[0151] Of course, in other embodiments, such as Figure 14 and Figure 15As shown, the first flow passage section 221 and the second flow passage section 222 can also be formed by directly opening holes on the outer surface of the core body 20 through a hole punching tool.

[0152] During the process of machining the valve core flow passage 22, in order to avoid interference between the hole punching tool and the side wall of the first groove 23 or the side wall of the second groove 24, as an implementation manner, as Figure 10 、 Figure 11 and Figure 13 shown, 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.

[0153] It should be noted that the area of the bottom wall of the first groove 23 mentioned above refers to the area of the bottom wall of the first groove 23 before the first flow port 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 port 2223 is formed.

[0154] Since the hole punching tool may be inclined with respect to the bottom wall of the first groove 23 during the process of machining the first flow passage section 221, making the area of the bottom wall of the first groove 23 larger than the area of the first flow port 2213 can avoid interference between the hole punching tool and the side wall of the first groove 23. Similarly, since the hole punching tool may be inclined with respect to the bottom wall of the second groove 24 during the process of machining the second flow passage section 222, making the area of the bottom wall of the second groove 24 larger than the area of the second flow port 2223 can avoid interference between the hole punching tool and the side wall of the second groove 24.

[0155] 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 implementation manner, as Figure 10 、 Figure 11 and Figure 13 shown, the first groove 23 has a first notch 231 on the outer surface of the core body 20, the second groove 24 has a second notch 241 on the outer surface of the core body 20, and the wall of the first notch 231 is arc-transitionally connected to the side wall of the first groove 23, and the wall of the second notch 241 is arc-transitionally connected to the side wall of the second groove 24. By the arc-transition connection between the 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 the arc-transition connection between the 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 overall friction between the valve core 2 and the valve core seal 40 during the rotation, and further reducing the rotation resistance of the valve core 2.

[0156] As another implementation, as shown in Figure 14 , Figure 15 and Figure 17 , the first flow channel section 221 has a first flow port 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 port 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. There is an arc-shaped transition connection between the wall of the first flow port 2213 and the first flow channel side wall 2211, and there is an arc-shaped transition connection between the second flow port 2223 and the second flow channel side wall 2221.

[0157] By the arc-shaped transition connection between the 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. By 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 of the valve core 2, and thus the rotation resistance of the valve core 2 can be reduced.

[0158] The present disclosure does not limit the radial cross-sectional shape of the first flow channel section 221 and the second flow channel section 222. The radial cross-sections of the first flow channel section 221 and the second flow channel section 222 can be any suitable shape. For example, as shown in Figure 10 and Figure 14 , the radial cross-section of at least part of the first flow channel section 221 can be circular; or, the radial cross-section of at least part of the second flow channel section 222 can also be semi-circular.

[0159] It should be noted here that the above-mentioned semi-circular shape refers to a missing circle with a central angle less than 360° and having a straight edge, and is not limited to the central angle of the semi-circular shape being only 180°.

[0160] In addition, as shown in Figure 11 and Figure 15 , there can be multiple valve core flow channels 22. The multiple valve core flow channels 22 can 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 can be respectively located on both sides of the longitudinal central plane 80 of the core body 20. Here, the longitudinal central plane 80 of the core body 20 refers to the plane passing through the center of the core body 20 in the vertical direction, as shown in Figure 11 and Figure 15 .

[0161] The first spool flow passage 223 and the second spool flow passage 224 are respectively located on both sides of the longitudinal central plane 80 of the spool body 20, which can enable the first spool flow passage 223 and the second spool flow passage 224 not to exceed the center of the spool body 20 and maintain a certain distance from the center of the spool body 20, thereby being beneficial to reducing the influence on the structural strength of the spool body 20 caused by opening the spool flow passage 22.

[0162] Through the first spool flow passage 223 and the second spool flow passage 224, pairwise conduction between at least four fluid pipelines connected to the switching valve 1 can be realized, and cutting off and commutation between at least four fluid pipelines can be realized by rotating the spool body 20. For an embodiment in which the number of both the first spool flow passage 223 and the second spool flow passage 224 is one, the spool 2 can be applicable to a four-way valve. Of course, the number of the first spool flow passage 223 can also be multiple, and the number of the second spool flow passage 224 can also be multiple.

[0163] The present disclosure does not limit the specific positions of the first spool flow passage 223 and the second spool flow passage 224. As an implementation manner, as Figure 11 and Figure 15 shown, the first spool flow passage 223 and the second spool flow passage 224 can be symmetrically arranged with respect to the longitudinal central plane 80, so that two fluid pipelines connected to the switching valve 1 can be conducted through the first spool flow passage 223 or through the second spool flow passage 224, which is beneficial to reducing the assembly difficulty between the spool body 20 and the valve body 10.

[0164] For the convenience of the assembly between the spool body 20 and the drive rod 54 of the switching valve 1, as an implementation manner, as Figure 6 、 Figure 8 、 Figure 10 and Figure 14 shown, a transmission groove 27 for connecting with the drive rod 54 of the switching valve 1 is provided on the spool body 20. At least one end of the transmission groove 27 along its length direction is an open end 271, and the open end 271 is used for 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 direction 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 the assembly between the spool body 20 and the drive rod 54 of the switching valve 1.

[0165] For the convenience of positioning between the spool body 20 and the valve body 10, as an implementation manner, as Figure 6 and Figure 7As shown, a positioning groove 21 for cooperating with a positioning projection 12 on the valve body 10 of the switching valve 1 is provided on the core body 20. The cross-sectional area of the positioning groove 21 is set to be larger than the cross-sectional area of the positioning projection 12. Alternatively, a positioning projection 12 for cooperating with the positioning groove 21 on the valve body 10 of the switching valve 1 is provided on the core body 20, and the cross-sectional area of the positioning projection 12 is set to be smaller than the cross-sectional area of the positioning groove 21.

[0166] During the installation process of the core body 20 and the valve body 10, rough positioning between the core body 20 and the valve body 10 can be achieved by inserting the positioning projection 12 into the positioning groove 21, which is simple and convenient. In addition, since the cross-sectional area of the positioning groove 21 is set to be larger than the cross-sectional area of the positioning projection 12, after the centering adjustment of the core body 20 and the valve body 10 is completed, there can be a gap between the circumferential side of the positioning projection 12 and the positioning groove 21, thereby reducing the rotational resistance of the valve body 10 to the core body 20.

[0167] Optionally, the positioning projection 12 on the valve body 10, or the positioning groove 21 on the valve body 10 can be located at the bottom of the valve body 10.

[0168] To make it easier for the positioning projection 12 to be inserted into the positioning groove 21, as an implementation manner, as Figure 7 shown, the notch of the positioning groove 21 is formed as a gradually expanding section 212. During the insertion of the positioning projection 12 into the positioning groove 21, by the avoidance of the gradually expanding section 212 for the end of the positioning projection 12, the positioning projection 12 can be more easily inserted into the positioning groove 21.

[0169] The volume ratio of the valve core flow channel 22 to the core body 20 of the present disclosure can be constructed as any suitable ratio, and the present disclosure does not limit this. As an implementation manner, the volume ratio of the valve core flow channel 22 to the core body 20 can be 0.21 - 0.28, which can make the valve core flow channel 22 have a larger flow area. For embodiments with multiple valve core flow channels 22 (such as the embodiment where the valve core flow channel 22 includes the first valve core flow channel 223 and the second valve core flow channel 224 described above), it can be understood that the volume ratio of the valve core flow channel 22 to the core body 20 here refers to the volume ratio of each valve core flow channel 22 to the core body 20.

[0170] The present disclosure does not limit the shape of the core body 20. As an implementation manner, as Figure 10 and Figure 14 shown, the core body 20 can be a sphere, so that the flow area of the valve core flow channel 22 can be designed larger, and the rotational friction between the outer surface of the core body 20 and the valve seat assembly 3 or other structures can also be reduced. As another implementation manner, the core body 20 can also be a cylinder.

[0171] 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 beneficial to reduce 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 make the outer surface of the core body 20 and the valve seat assembly 3 have good sealing.

[0172] Valve core seal 40

[0173] like Figures 18 to 22 As shown, the present disclosure further provides a valve core seal 40 of a switching valve 1, wherein the valve core seal 40 includes a seal body 41, the seal body 41 having a second end and a first end opposite to each other, and a flow channel 411 is provided on the seal 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 along the direction from the first end to the second end of the seal body, the radial cross-section area of ​​the tapered channel section 4111 gradually increases, 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.

[0174] Here, it should be noted that the axial cross-section of the above-mentioned conical channel section 4111 refers to the cross-section obtained after 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 after 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).

[0175] According to the above technical solution, since the seal body 41 has a second end and a first end opposite to each other, and a flow passage 411 is provided on the seal body 41, which runs from the second end to the first end, when the valve core seal 40 is installed on the valve body 10 and contacts the valve core 2, the valve core flow passage 22 in the valve core 2 can be connected to the fluid pipeline connected to the switching valve 1 via the flow passage 411 on the valve core seal 40. The axial cross section of the tapered channel section 4111 of the flow passage 411 is a trapezoid, and the area of ​​the radial cross section of the tapered channel section 4111 gradually increases from the first end to the second end. When the seal body 41 is installed, the second end can be arranged toward the valve core 2, part of the valve core 2 can be located in the tapered channel section 4111, and the channel wall of the tapered channel section 4111 can form a line contact with the outer surface of the valve core 2, thereby achieving the effect of sealing the valve core 2.

[0176] 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.

[0177] In addition, along the axial direction of the tapered channel section 4111, any position of the channel wall of the tapered channel section 4111 can be used to form a 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.

[0178] The present disclosure does not limit the specific structure of the above-mentioned flow channel 411. Optionally, as Figure 9 and Figure 21 As shown, the tapered channel section 4111 has a large diameter end and a small diameter end, the area of ​​the large diameter end is larger than the area of ​​the small diameter end, and the large diameter end is located on the end surface 416 of the second end of the seal body. In other words, the position where the radial cross-sectional area of ​​the tapered channel section 4111 is the largest is located on the end surface 416 of the second end of the seal body, and when the valve core 2 contacts the valve core seal 40, part of the valve core 2 can easily enter the first channel from the large diameter end of the tapered channel section 4111.

[0179] In addition, as an implementation method, Figure 9 and Figure 21 As shown, the flow channel 411 may also include a cylindrical channel section 4112, the axial cross-section of the cylindrical channel section 4112 is square (i.e., 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.

[0180] 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.

[0181] In order to reduce the resistance of the through-flow channel 411 to the fluid, as an embodiment, the radial cross-section of the conical channel section 4111 and the radial cross-section of the cylindrical channel section 4112 can both be circular. This arrangement can make a smooth transition between the conical channel section 4111 and the cylindrical channel section 4112, reducing the resistance of the through-flow channel 411 to the fluid.

[0182] 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.

[0183] Optionally, as Figure 9 and Figure 21 shown, the axial cross-section of the conical channel section 4111 can be an isosceles trapezoid, so that there is a good sealing effect between the channel wall of the conical channel section 4111 and the outer surface of the spherical valve core 2. Especially in the embodiment where the radial cross-section of the conical channel section 4111 is circular, the axial cross-section of the conical channel section 4111 being an isosceles trapezoid can make its channel wall fit the outer surface of the spherical valve core 2, thus having good sealing. It can be understood that in other embodiments, the axial cross-section of the conical channel section 4111 can also be a right trapezoid or the like.

[0184] The present disclosure does not limit the included angle between the two waists of the above trapezoid. As one embodiment, the included angle between the two waists of the trapezoid can be 115° - 125°. The included angle between the two waists of the trapezoid being 115° - 125° is beneficial to fitting the shape of the spherical valve core 2, so that the channel wall of the conical channel section 4111 and the outer surface of the valve core 2 form a line contact.

[0185] The present disclosure does not limit the material of the seal body 41. As one embodiment, the seal body 41 can be made of polytetrafluoroethylene. Polytetrafluoroethylene has good lubricity and sealing performance. Therefore, the seal body 41 being made of polytetrafluoroethylene is beneficial to further reducing the frictional resistance between the channel wall of the conical channel section 4111 and the outer surface of the valve core 2, and can make there be a good seal between the channel wall of the conical channel section 4111 and the outer surface of the valve core 2.

[0186] As another embodiment, the seal body 41 can also be made of copper.

[0187] Valve seat assembly 3

[0188] As Figures 18 to 22 shown, the present disclosure also provides a valve seat assembly 3 of the switching valve 1, including the above-mentioned valve core seal 40 and the mounting seat 4. The valve core seal 40 includes a seal body 41. A flow-through channel 411 is provided on the seal body 41, which penetrates from the first end of the seal body 41 to the second end of the seal body 41. The flow-through channel 411 is adapted to accommodate a part of the valve core 2 of the switching valve 1, and at least part of the channel wall of the flow-through channel 411 is used for sealing contact with the outer surface of the valve core 2. The flow-through channel 411 can be communicated with the valve core flow channel 22 in the valve core 2. The mounting seat 4 is used to connect with the valve body 10 of the switching valve 1. Among them, the first end of the seal body 41 is installed in the mounting seat 4, and the second end of the seal body 41 is located outside the mounting seat 4.

[0189] 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 seal body 41 is installed in the mounting seat 4, with the second end of the seal body 41 facing the valve core 2. As a result, part of the valve core 2 can be located within the flow passage 411, and the wall of the flow passage 411 can be in sealing contact with the outer surface of the valve core 2, achieving the effect of sealing the valve core 2.

[0190] Through the above technical solution, since the second end of the seal body 41 of the valve core seal 40 provided in the present disclosure is located outside the mounting seat 4, that is, the second end of the seal body 41 of the valve core seal 40 protrudes outward from the mounting seat 4 towards the outside of the mounting seat 4. Thus, while the valve core 2 forms a sealing contact with the wall of the flow passage 411, it can prevent the outer surface of the valve core 2 from contacting the mounting seat 4, avoid friction between the valve core 2 and the mounting seat 4 during the rotation of the valve core 2, and reduce the influence of the mounting seat 4 on the rotation of the valve core 2.

[0191] 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 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.

[0192] To prevent the second end of the seal body 41 from being pushed against and deformed by the valve core 2, affecting the sealing effect of the valve core seal 40, as Figure 22 shown, the second end of the seal body 41 is provided with an abutting portion 49. The abutting portion 49 protrudes radially outward from the seal body 41 along the flow passage 411, and the abutting portion 49 abuts against the end face of the mounting seat 4 close to the abutting portion 49.

[0193] When the second end of the seal body 41 is pushed against by the valve core 2, the end face of the mounting seat 4 close to the abutting portion 49 supports the abutting portion 49. Thus, the second end of the seal body 41 is supported through the abutting portion 49, enabling the second end of the seal body 41 to be well supported, thereby preventing the second end of the seal body 41 from being pushed against and deformed by the valve core 2 and ensuring the sealing effect of the valve core seal 40 on the valve core 2.

[0194] The present disclosure does not limit the specific structure of the abutting portion 49. As an implementation manner, as Figure 20 shown, the abutting portion 49 can be an annular flange extending circumferentially along the flow passage 411. As another implementation manner, the abutting portion 49 can be protrusions arranged at intervals circumferentially along the flow passage 411.

[0195] The mounting seat 4 can have any suitable shape and structure. In one implementation manner of the mounting seat 4, to enable the seal body 41 to be installed in the mounting seat 4, as Figure 21As shown, a clamping hole 47 can be formed on the mounting seat 4, and the seal body 41 is clamped to the mounting seat 4 through the clamping hole 47.

[0196] In order to enable the mounting seat 4 to be connected to the valve body 10 of the switching valve 1, optionally, as Figure 3 shown, 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 notch).

[0197] In order to enable the flow passage 411 to communicate with the fluid pipeline connected to the switching valve 1, optionally, as Figure 3 shown, a valve body flow passage 5 communicating with the second clamping groove 6 can be formed on the valve body 10, and the valve body flow passage 5 is used to communicate the flow passage 411 on the seal body 41 with the fluid pipeline outside the switching valve 1.

[0198] In order to make it easier for the valve core seal 40 to be inserted into the mounting seat 4, as Figure 22 shown, there is a bent portion 71 between the abutting portion 49 and the seal body 41, and a chamfer 70 can be provided at the corner of the mounting seat 4 corresponding to the bent portion 71. Through the chamfer 70, the seal body 41 can be more easily inserted into the mounting seat 4, and it can also avoid being scratched by the edge of the mounting seat 4 during the insertion process.

[0199] In order to prevent the abutting portion 49 from being deformed due to the extrusion of the groove wall of the second clamping groove 6 on the valve body 10, which affects the sealing effect of the valve core seal 40, as an implementation manner, as Figures 20 to 22 shown, the outer peripheral surface of the abutting portion 49 is flush with the outer peripheral surface of the mounting seat 4. Since the outer peripheral surface of the abutting portion 49 is flush with the outer peripheral surface of the mounting seat 4, the abutting portion 49 will not be overly extruded by the groove wall of the second clamping groove 6, so it will not be deformed and affect the sealing effect of the valve core seal 40. Moreover, it is beneficial to eliminate the gap 72 between the end of the abutting portion 49 away from the seal body 41 and the groove wall of the second clamping groove 6, so that the groove wall of the second clamping groove 6 can abut against the abutting portion 49, enabling the seal body 41 to support the valve core 2 well.

[0200] In order to ensure that the part of the seal body 41 protruding from the mounting seat 4 will not be deformed by the abutment of the valve core 2, as an implementation manner, as Figure 21 and Figure 22As shown, the end face 416 of the second end of the seal body is flush with the end face 491 of the end of the abutting portion 49 away from the mounting seat 4. With this arrangement, the end face of the valve core seal 40 close to the valve core 2 can be a flat surface, and the portion of the seal body 41 protruding from the mounting seat 4 can be supported by the abutting portion 49, preventing the portion of the valve core seal 40 protruding from the mounting seat 4 from being deformed by the abutment of the valve core 2.

[0201] In another embodiment of the mounting seat 4, in order to enable the seal body 41 to be mounted on the mounting seat 4, as Figure 19 shown, a first clamping groove 46 is provided on the mounting seat 4. The first end of the seal body 41 is clamped in the first clamping groove 46 and abuts against the bottom wall of the first clamping groove 46 (i.e., the inner wall of the first clamping groove 46 away from its own notch), and the second end of the seal body 41 is located outside the first clamping groove 46. Mounting the seal body 41 in the first clamping groove 46 and abutting the bottom wall of the first clamping groove 46 against the first end of the seal body 41 is beneficial for the channel wall of the flow-through channel 411 to maintain a sealed contact with the outer surface of the valve core 2.

[0202] In order to enable the flow-through channel 411 to communicate with the fluid pipeline connected to the switching valve 1, as an embodiment, as Figure 3 、 Figure 6 and Figure 19 shown, a fluid channel 48 is provided on the mounting seat 4. One end of the fluid channel 48 communicates with the flow-through channel 411, and the other end of the fluid channel 48 penetrates the end face of the mounting seat 4 away from the seal body 41. Since one end of the fluid channel 48 communicates with the flow-through channel 411 and the other end of the fluid channel 48 penetrates the end face of the mounting seat 4 away from the seal body 41, the flow-through channel 411 can communicate with the fluid pipeline outside the switching valve 1 through the fluid channel 48.

[0203] In order to enable the mounting seat 4 to be connected to the valve body 10 of the switching valve 1, as an embodiment, as Figure 3 、 Figure 6 、 Figure 19 and Figure 20As shown, an external thread (such as the aforementioned first external thread 4211 or second external thread 4311) may be provided on the outer peripheral surface of the mounting seat 4 (such as the aforementioned first mounting seat 421 or second mounting seat 431), and the external thread is used to cooperate with the threaded hole (such as the aforementioned first mounting hole 14 or second mounting hole 15) on the valve body 10. Through the threaded cooperation between the external thread on the outer peripheral surface of the mounting seat 4 and the threaded hole on the valve body 10, the mounting seat 4 can be mounted on the valve body 10 or removed from the valve body 10. Moreover, by circumferentially rotating the mounting seat 4, the position of the valve seat assembly 3 can be adjusted to make the seal body 41 approach or move away from the valve core 2. In this way, on the one hand, the position of the valve core 2 in the accommodation cavity 11 can be adjusted, and on the other hand, it can be ensured that the channel wall of the flow passage 411 can form a sealing contact with the outer surface of the valve core 2 to ensure the sealing performance. As another implementation manner, the mounting seat 4 can also be fixed on the valve body 10.

[0204] Optionally, as Figure 19 and Figure 21 shown, the seal body 41 may include a main body portion 34 and an insertion portion 33. The first end of the main body portion 34 is located in the clamping hole 47 or the first clamping groove 46, the second end of the main body portion 34 is located outside the clamping hole 47 or the first clamping groove 46, an abutting portion 49 is provided at the second end of the main body portion 34, the insertion portion 33 is located in the clamping hole 47 and is connected to the first end of the main body portion 34, the outer peripheral surface of the main body portion 34 fits with the hole wall of the clamping hole 47 or the groove wall of the first clamping groove 46, and there is a gap 72 between the outer peripheral surface of the insertion portion 33 and the hole wall of the clamping hole 47 or the groove wall of the first clamping groove 46. 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 portion 33 and the hole wall of the clamping hole 47 or the groove wall of the first clamping groove 46, the sealing ring 7 can be sleeved on the insertion portion 33. As Figure 20 and Figure 21 shown, by clamping the sealing ring 7 between the main body portion 34 and the valve body 10 (i.e., the bottom wall of the second clamping groove 6), or between the main body portion 34 and the bottom wall of the first clamping groove 46, good sealing can be achieved between the main body portion 34 and the valve body 10 or the mounting seat 4.

[0205] In one implementation manner, in order to enable the sealing ring 7 to have a sufficient sealing contact area with the main body portion 34 and the valve body 10, as Figure 20 and Figure 21 shown, the distance between the outer peripheral surface of the insertion portion 33 and the hole wall of the clamping hole 47 may 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 clamping hole 47, thereby enabling the sealing ring 7 to have a sufficient sealing contact area with the main body portion 34 and the valve body 10.

[0206] In another embodiment, in order to ensure that there is sufficient sealing contact area between the sealing ring 7, the main body portion 34 and the bottom wall of the first clamping groove 46, as Figure 19 shown, the distance between the outer peripheral surface of the insertion portion 33 and the side wall of the first clamping 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 clamping groove 46, thereby ensuring that there is sufficient sealing contact area between the sealing ring 7, the main body portion 34 and the bottom wall of the first clamping groove 46.

[0207] The channel wall of the flow passage 411 can be in surface contact with the outer surface of the valve core 2 or in line contact with the outer surface of the valve core 2. The present disclosure does not limit this.

[0208] For example, in one embodiment, the channel wall of the flow passage 411 can be formed into an arc structure that fits the outer surface of the spherical valve core 2, so as to be in surface contact with the outer surface of the valve core 2.

[0209] The switching valve 1 provided by the present disclosure can be used in any suitable application scenario. For example, it can be used in a thermal management system. Therefore, according to one aspect of the present disclosure, a thermal management system including the above-mentioned switching valve 1 is also provided.

[0210] According to still another aspect of the present disclosure, a vehicle including the above-mentioned thermal management system is also provided.

[0211] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of 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 protection scope of the present disclosure.

[0212] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination methods.

[0213] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A switching valve, characterized in that, it includes: a valve body with an accommodation cavity formed inside; a valve core rotatably accommodated in the accommodation cavity; a plurality of valve seat assemblies, all installed on the valve body and fitting against the outer surface of the valve core; wherein, the plurality of valve seat assemblies include a first valve seat assembly and a second valve seat assembly, the valve body is provided with a first mounting hole and a second mounting hole both communicating with the accommodation 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.

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

3. The switching valve according to claim 1, characterized in that, the first valve seat assembly includes a first mounting seat and a first valve core seal installed on the first mounting seat, at least part of the outer surface of the first mounting seat is formed with a first external thread, and at least part of the hole wall of the first mounting hole is formed with a first internal thread matching the first external thread; the second valve seat assembly includes a second mounting seat and a second valve core seal installed on the second mounting seat, at least part of the outer surface of the second mounting seat is formed with a second external thread, and at least part of the hole wall of the second mounting hole is formed with a second internal thread matching the second external thread.

4. The switching valve according to claim 1, characterized in that, the plurality of valve seat assemblies further include a third valve seat assembly and a fourth valve seat assembly, the valve body is further provided with a third mounting hole and a fourth mounting hole both communicating with the accommodation cavity, the third valve seat assembly is fixed in the third mounting hole, and the fourth valve seat assembly is fixed in the fourth mounting hole.

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

6. The switching valve according to claim 4, characterized in that, 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.

7. The switching valve according to claim 4, characterized in that, the third valve seat assembly includes a third mounting seat and a third valve core seal installed on the third mounting seat, the third mounting seat is fixed in the third mounting hole; the fourth valve seat assembly includes a fourth mounting seat and a fourth valve core seal installed on the fourth mounting seat, the fourth mounting seat is fixed in the fourth mounting hole.

8. The switching valve according to claim 7, characterized in that, at least one valve core flow channel penetrating the valve core is formed inside the valve core, a third through-flow channel is formed on the third valve core seal, a fourth through-flow channel is formed on the fourth valve core seal, and both the third through-flow channel and the fourth through-flow channel can communicate with the valve core flow channel; A first valve body flow channel and a second valve body flow channel are further formed on the valve body. A first flow port of the first valve body flow channel communicates with the third flow-through channel, and a first flow port of the second valve body flow channel communicates with the fourth flow-through channel. A second flow port of the first valve body flow channel and a second flow port of the second valve body flow channel are located on the same side of the valve body.

9. The switching valve according to claim 8, wherein, the first valve body flow channel includes a first section and a second section. A central axis of the first section is parallel to a central axis of the third flow-through channel, and a first end of the first section communicates with the third flow-through channel. A second end of the first section intersects and communicates with a first end of the second section; a central axis of the second section is disposed at an angle to the central axis of the first section, and both the central axis of the first section and the central axis of the second section are straight lines.

10. The switching valve according to claim 9, wherein, the second end of the first section protrudes outward from the second section towards the second section.

11. The switching valve according to claim 1, wherein, at least one valve core flow channel penetrating the valve core is formed in the valve core. Each valve seat assembly includes a valve core seal, and a flow-through channel is provided on the valve core seal, and the flow-through channel can communicate with the valve core flow channel.

12. The switching valve according to claim 11, wherein, a part of the valve core is located in the flow-through channel, and a channel wall of the flow-through channel is arranged to be in line contact with an outer surface of the valve core.

13. The switching valve according to claim 12, wherein, the flow-through channel includes a tapered channel section. A part of the valve core is located in the tapered channel section. Along a direction from an end of the tapered channel section far from the valve core to an end of the tapered channel section close to the valve core, an area of a radial cross-section of the tapered channel section gradually increases, so that the channel wall of the tapered channel section can be in line contact with the outer surface of the valve core.

14. The switching valve according to claim 11, wherein, 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 communicate with each other. A central axis of the first flow channel section is a straight line, a central axis of the second flow channel section is a straight line, and an included 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.

15. The switching valve according to claim 14, wherein, the included angle between the central axis of the first flow channel section and the central axis of the second flow channel section is 108° to 120°.

16. The switching valve according to claim 11, wherein, a ratio of a volume of the valve core flow channel to a volume of the valve core is 0.21 to 0.

28.

17. The switching valve according to any one of claims 11-16, wherein, there are multiple valve core flow channels. The multiple valve core flow channels include a first valve core flow channel and a second valve core flow channel. The first valve core flow channel and the second valve core flow channel are respectively located on two sides of a longitudinal central plane of the valve core.

18. The switching valve according to any one of claims 1-16, characterized in that, one of the valve core and the valve body is provided with a positioning protrusion, and the other of the valve core and the valve body is provided with a positioning groove. 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; The switching valve further includes a valve core base. The valve core base is located in the accommodation cavity and connected to the valve body. The valve core base supports the bottom of the valve core and makes there be a gap between the outer surface of the positioning protrusion and the groove wall of the positioning groove.

19. The switching valve according to claim 18, characterized in that, 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 a line contact with the outer surface of the valve core.

20. The switching valve according to claim 19, characterized in that, The supporting portion has a tapered surface, and along the direction from the end of the supporting portion far from the valve core to the end of the supporting portion close to the valve core, the area of the radial cross-section of the tapered surface gradually increases.

21. The switching valve according to claim 18, characterized in that, 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 along the direction from the end of the gradually expanding section close to the main body section to the end of the gradually expanding section far from the main body section, the cross-sectional area of the gradually expanding section gradually increases.

22. The switching valve according to claim 18, characterized in that, The valve body is provided with a mounting groove communicating with the accommodation cavity. The valve core base has an insertion portion, and the insertion portion is inserted into the mounting groove. The positioning protrusion passes through the valve core base and extends into the positioning groove.

23. The switching valve according to any one of claims 1-16, characterized in that, The switching valve further includes a valve cover assembly. The valve cover assembly includes a valve cover body. A valve cover mounting hole communicating with the accommodation cavity is formed on the valve body. The valve cover mounting hole is configured to allow the valve core to pass through, and the valve cover body is mounted in the valve cover mounting hole; 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; Wherein, part of the valve core is located in the first through hole.

24. The switching valve according to claim 23, characterized in that, The valve cover assembly further includes a gland. The gland is mounted on the side of the valve cover body away from the accommodation cavity. A second through hole for the driving rod to pass through is formed on the gland, and the cross-sectional area of the second through hole is smaller than the cross-sectional area of the first through hole.

25. A thermal management system, characterized in that, It includes the switching valve according to any one of claims 1-24.

26. A vehicle, characterized in that, It includes the thermal management system according to claim 25.

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