Valve seat, electromagnetic valve, air conditioning system and vehicle

Abstract

The utility model provides a valve seat, an electromagnetic valve, an air conditioning system and a vehicle. The valve seat comprises a valve seat body. A first cavity is formed in the valve seat body, a first hollow part is formed in the first surface of the valve seat body, and a second hollow part is formed in the second surface of the valve seat body; an included angle is formed between the first surface and the second surface, and the first hollow part and the second hollow part are both communicated with the first cavity. Therefore, the hollow part space has two different circulation directions, and compared with the related technology of a single circulation direction, the circulation directions are enriched, the circulation volume is increased, and the flow path is improved. In addition, the overall height or width of the valve seat is reduced, the use cost of materials is reduced, and the requirements for light weight and miniaturization are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of solenoid valves, and in particular relates to a valve seat, a solenoid valve, an air-conditioning system and a vehicle. Background Art

[0002] Solenoid valves are electromagnetically controlled industrial components widely used in air conditioning and heat pump systems. They operate with refrigerant as the working medium and feature low noise, low power consumption, high sensitivity, and a low starting voltage. The valve opening is controlled by energizing the coil to drive the magnet. For use in vehicles, stable control and sufficient flow are essential.

[0003] In the related art, the flow path of the solenoid valve is insufficient due to the structure of the solenoid valve seat. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a valve seat, a solenoid valve, an air-conditioning system and a vehicle, which can solve the problem of insufficient flow path of the solenoid valve in the related art.

[0005] In order to solve the above technical problems, the utility model is achieved as follows:

[0006] In a first aspect, an embodiment of the present utility model provides a valve seat, comprising a valve seat body;

[0007] The valve seat body has a first cavity inside, a first hollow portion is formed on the first surface of the valve seat body, and a second hollow portion is formed on the second surface of the valve seat body;

[0008] An included angle is formed between the first surface and the second surface, and the first hollow portion and the second hollow portion are both connected to the first cavity.

[0009] Optionally, the first hollow portion and the second hollow portion are connected to form a first flow channel, and the first flow channel is connected to the first cavity.

[0010] Optionally, the valve seat body has an opening communicating with the first cavity, and a first thread is provided inside the valve seat body, and the first thread is located at the opening.

[0011] Optionally, the opening is adjacent to the first surface, a first guide surface is provided between the first thread and the first hollow portion, and the first guide surface is planar.

[0012] Optionally, the valve seat body is cylindrical, and a plurality of the first hollow portions and a plurality of the second hollow portions are provided along the circumference of the valve seat body.

[0013] Optionally, the plurality of first hollow portions and the plurality of second hollow portions are evenly distributed along the circumference of the valve seat body.

[0014] Optionally, a flow cylinder is further included;

[0015] The flow cylinder is connected to the valve seat body. The flow cylinder is provided with a second flow channel along the axial direction. The second flow channel is communicated with the first cavity.

[0016] In a second aspect, an embodiment of the present utility model further provides a solenoid valve, comprising a valve body and any one of the valve seats described above;

[0017] The valve body is at least partially threadedly connected to the valve seat body. A second guide surface is provided on the outside of the valve body. The second guide surface is clearance-matched with the first guide surface inside the valve seat body.

[0018] Optionally, it further includes a valve core assembly, a first magnetic component and a second magnetic component;

[0019] The valve core assembly is movably connected to the valve body, one end of the first magnetic member is fixedly connected to the valve core assembly, and the other end is located outside the valve body and movably connected to the second magnetic member;

[0020] The first magnetic member is used to drive the valve core assembly to slide relative to the valve body to block or open the first flow channel and the second flow channel.

[0021] Optionally, it further includes a first elastic member and a second elastic member;

[0022] The first elastic member is disposed between the valve core assembly and the valve body, and the second elastic member is disposed between the first magnetic member and the second magnetic member.

[0023] Optionally, it further comprises a housing;

[0024] The shell is fixedly connected to the valve body, the first magnetic component is movably arranged inside the shell, and the second magnetic component is at least partially fixedly connected to the inside of the shell.

[0025] Optionally, it also includes a cover and an anti-loosening pad;

[0026] The cover body is provided with a mounting groove inside, the anti-loosening pad is provided between the mounting groove and the valve body, and the cover body is provided with a threaded structure outside.

[0027] Optionally, it further includes a first sealing member and a second sealing member;

[0028] The first sealing member is sealed and connected to the outside of the valve seat, and the second sealing member is sealed and connected to the outside of the valve body.

[0029] In a third aspect, an embodiment of the present invention further provides an air-conditioning system, comprising the solenoid valve described in any one of the above items.

[0030] In a fourth aspect, an embodiment of the present invention further provides a vehicle comprising any of the above-mentioned solenoid valves or air-conditioning systems.

[0031] The valve seat provided in the embodiment of the present invention is composed of a valve seat body. A first hollow portion is provided on the first surface of the valve seat body, and a second hollow portion is provided on the second surface of the valve seat body. The first surface and the second surface have an angle, so that the two hollow portions have different penetration directions and are both connected to the cavity inside the valve seat body. That is, the hollow portions are opened in different directions. Compared with the related technology of opening a hollow portion in a single direction, the hollow portion space includes at least two different directions, and its flow volume, that is, the flow path, is larger. At the same time, it avoids opening an excessively large hollow portion in a single direction, such as on the side wall of the valve seat, thereby reducing the overall height or width of the valve seat, reducing the material usage cost, and meeting the requirements of lightweight and miniaturization. This thereby improves the control performance of the solenoid valve.

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 This is a schematic diagram of the valve seat structure provided by an embodiment of the present utility model;

[0035] Figure 2 This is an embodiment of the utility model Figure 1 Plane diagram along direction A;

[0036] Figure 3 This is an embodiment of the utility model Figure 1 Plane diagram along direction B;

[0037] Figure 4 This is an embodiment of the utility model Figure 3 Schematic diagram of the cross section along CC direction;

[0038] Figure 5 This is a schematic diagram of the valve body structure of an embodiment of the utility model;

[0039] Figure 6 This is an embodiment of the utility model Figure 5 Plane diagram along direction A;

[0040] Figure 7 This is an embodiment of the utility model Figure 5 Plane diagram along direction B;

[0041] Figure 8 This is an embodiment of the utility model Figure 7 Schematic diagram of the cross section along CC direction;

[0042] Figure 9 This is a schematic diagram of the structure of the solenoid valve provided by an embodiment of the utility model;

[0043] Figure 10 This is an embodiment of the utility model Figure 9 Plane diagram along direction A;

[0044] Figure 11 This is an embodiment of the utility model Figure 9 Plane diagram along direction B;

[0045] Figure 12 This is an embodiment of the utility model Figure 11 Schematic diagram of the cross section along CC direction.

[0046] Description of reference numerals:

[0047] 1-valve seat, 101-valve seat body, 102-flow tube, 11-first cavity, 12-first hollow portion, 13-second hollow portion, 14-first flow channel, 15-opening, 16-first thread, 17-first guide surface, 18-second flow channel, 2-valve body, 21-second guide surface, 22-second thread, 23-second cavity, 3-valve core assembly, 4-first magnetic part, 5-second magnetic part, 61-first elastic part, 62-second elastic part, 7-shell, 81-cover body, 811-third thread, 812-installing groove, 82-anti-loosening pad, 91-first sealing part, 92-second sealing part, 100-fixed body. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] The terms "first," "second," and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0050] The valve seat, solenoid valve, air conditioning system and vehicle provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0051] Reference Figures 1 to 4 An embodiment of the present invention provides a valve seat 1, comprising a valve seat body 101; the interior of the valve seat body 101 has a first cavity 11, a first hollow portion 12 is provided on the first surface of the valve seat body 101, and a second hollow portion 13 is provided on the second surface of the valve seat body 101; there is an angle between the first surface and the second surface, and the first hollow portion 12 and the second hollow portion 13 are both connected to the first cavity 11.

[0052] Specifically, if Figures 1 to 4 As shown, the valve seat 1 is the supporting base of the solenoid valve, and its material includes but is not limited to rubber, plastic, metal or ceramic. This embodiment adopts aluminum alloy 6061, and its main structure is the valve seat body 101, which is a cylindrical rotating body structure. The interior of the valve seat body 101 has a first cavity 11, and the first cavity 11 is used to install the valve body 2 and circulate liquid such as refrigerant. A first hollow portion 12 is provided on the first surface of the valve seat body 101, and a second hollow portion 13 is provided on the second surface of the valve seat body 101. There is an angle between the first surface and the second surface, and this angle is close to or equal to 90°, such as 80°, 82°, 85°, 88° or 90°. This angle depends on the overall shape of the valve seat body 101. The larger the angle, the larger the flow path of the first flow channel 14 formed by the two hollow portions. Since the valve seat body 101 of this embodiment is cylindrical, the first surface is the side wall of the valve seat body 101, and the second surface is the bottom of the valve seat body 101. The first surface and the second surface are perpendicular to each other. As Figure 1As shown, the penetration direction of the first hollow portion 12 is along the XY plane, and the penetration direction of the second hollow portion 13 is along the Z direction. According to the opening position of the first hollow portion 12, its penetration direction is along any direction in the XY plane, for example, along the X direction, the Y direction or a direction at a 45° angle to the X direction. The first hollow portion 12 and the second hollow portion 13 are both connected to the first cavity 11. The number of the first hollow portion 12 and the second hollow portion 13 is the same, which can be one, two or more. That is, the hollow portion space has at least two orthogonal flow directions, and the liquid can flow in or out along one of the directions on the XY plane and the Z direction. Compared with the related technology with a single flow direction, the flow direction is enriched while the flow volume is increased, thereby improving the flow path. The first hollow portion 12 and the second hollow portion 13 can be connected or spaced apart and not connected.

[0053] The valve seat provided by the present invention has two hollowed-out portions on two planes at a certain angle, allowing the hollowed-out portion to have two different flow directions. Compared to related technologies with a single flow direction, this enriches the flow directions while increasing the flow volume and improving the flow path. Furthermore, by avoiding the need for excessively large hollowed-out portions in a single direction, such as on the sidewall or bottom of the valve seat, the overall height or width of the valve seat is reduced, reducing material costs and meeting the requirements of lightweight and miniaturization. Furthermore, the control performance of the solenoid valve is improved.

[0054] Optionally, refer to Figures 1 to 4 The first hollow portion 12 is connected to the second hollow portion 13 to form a first flow channel 14 , and the first flow channel 14 is connected to the first cavity 11 .

[0055] Specifically, if Figures 1 to 4 As shown, in this embodiment, the first hollow portion 12 is connected to the second hollow portion 13 to form a first flow channel 14. Since both the first hollow portion 12 and the second hollow portion 13 are connected to the first cavity 11, the first flow channel 14 is connected to the first cavity 11, and the first flow channel 14 has at least two different flow directions. The first flow channel 14 is an inlet flow channel or an outlet flow channel, that is, the fluid flowing into the first flow channel 14 enters the first cavity 11, and the fluid flowing out of the first cavity 11 flows out of the first flow channel 14.

[0056] Optionally, refer to Figures 1 to 4 The valve seat body 101 has an opening 15 communicating with the first cavity 11 . A first thread 16 is formed inside the valve seat body 101 . The first thread 16 is located at the opening 15 .

[0057] Specifically, if Figures 1 to 4As shown, the first surface of the valve seat body 101 is the side wall, the second surface is the bottom, and the opening 15 is located at the top and communicates with the first cavity 11. The interior of the valve seat body 101 is provided with a first thread 16, that is, the valve seat body 101 is an internal thread structure, and the upper end of the first thread 16 is located at the opening 15. In some embodiments, combined with Figure 5 As shown, when the valve seat 1 and the valve body 2 are assembled, the valve body 2 extends into the first cavity 11 through the opening 15 at the top of the valve seat 1, and a threaded connection is formed between the second thread 22 of the valve body and the first thread 16 of the valve seat body 101. The installer can tighten or loosen the valve body 2 along the thread direction, making the assembly and disassembly of the solenoid valve structure simpler and more reliable, and the threaded connection structure operates stably and reliably, thereby facilitating the replacement and maintenance of the internal parts of the solenoid valve, and reducing the maintenance and assembly costs.

[0058] Optionally, refer to Figures 1 to 4 The opening 15 is adjacent to the first surface, and a first guide surface 17 is provided between the first thread 16 and the first hollow portion 12 , and the first guide surface 17 is plane.

[0059] Specifically, if Figures 1 to 4 As shown, the opening 15 of the valve seat body 101 is located at the top, adjacent to the first surface, i.e., the side wall, and a first guide surface 17 is provided between the lower portion of the first thread 16 and the first hollow portion 12. The first guide surface 17 is flat. In some embodiments, the valve seat body 101 is provided with a first guide surface 17. Figure 5 As shown, when the valve seat 1 and the valve body 2 are assembled and threaded together, the first guide surface 17 of the valve seat 1 and the second guide surface 21 of the valve body 2 are clearance-fitted to prevent significant deviation in the assembly position of the valve seat 1 and the valve body 2 due to a void during thread locking, thus limiting the position of the valve seat 1 and the valve body 2. The planar guide surface increases the contact area between the first guide surface 17 and the second guide surface 21, enhancing the frictional restraint force and ensuring the limiting effect.

[0060] Optionally, refer to Figures 1 to 4 The valve seat body 101 is cylindrical, and a plurality of the first hollow portions 12 and a plurality of the second hollow portions 13 are provided along the circumference of the valve seat body 101 .

[0061] Specifically, if Figures 1 to 4 As shown, multiple first hollow portions 12 and multiple second hollow portions 13 are defined along the circumference of the cylindrical structure of the valve seat body 101. Each first hollow portion 12 corresponds to a second hollow portion 13. Increasing the number of first hollow portions 12 and multiple second hollow portions 13 increases the flow path and, therefore, the control performance of the solenoid valve.

[0062] Optionally, refer to Figures 1 to 4The plurality of first hollow portions 12 and the plurality of second hollow portions 13 are evenly distributed along the circumference of the valve seat body 101 .

[0063] Specifically, if Figures 1 to 4 As shown, multiple first hollow portions 12 and multiple second hollow portions 13 are evenly distributed along the circumference of the valve seat body 101. In this embodiment, six first hollow portions 12 and six second hollow portions 13 are provided, evenly distributed around the circumference of the valve seat body 101. That is, the angle between each two adjacent first hollow portions 12 is 60°. Providing evenly distributed hollow portions can ensure uniform flow distribution and facilitate adjustment of the solenoid valve opening.

[0064] Optionally, refer to Figures 1 to 4 , further comprising a flow tube 102 ; the flow tube 102 is connected to the valve seat body 101 , the flow tube 102 is provided with a second flow channel 18 along the axial direction, and the second flow channel 18 is connected to the first cavity 11 .

[0065] Specifically, if Figures 1 to 4 As shown, the flow tube 102 is integrally connected to the lower portion of the valve seat body 101. A second flow channel 18 is provided along the axial direction of the flow tube 102, communicating with the first cavity 11. The flow directions of the first flow channel 14 and the second flow channel 18 are opposite to each other. When liquid flows into the first flow channel 14, liquid flows out of the second flow channel 18; when liquid flows out of the first flow channel 14, liquid flows into the second flow channel 18.

[0066] Reference Figures 9 to 12 The embodiment of the present invention also provides a solenoid valve, including a valve body 2 and a valve seat 1 as described above; the valve body 2 is at least partially threadedly connected to the valve seat body 101, and a second guide surface 21 is provided on the outside of the valve body 2, and the second guide surface is clearance-matched with the first guide surface 17 inside the valve seat body 101.

[0067] Specifically, if Figures 5 to 12 As shown, the solenoid valve includes a valve body 2 and a valve seat 1. The valve body 2 is a cylindrical rotating body structure and is made of stainless steel 304. A second thread 22 is provided near the lower part of the valve body 2, and a second guide surface 21 is provided below the second thread 22. When the valve seat 1 and the valve body 2 are assembled, the valve body 2 extends into the first cavity 11 through the opening 15 at the top of the valve seat 1, and a threaded connection is formed between the second thread 22 of the valve body 2 and the first thread 16 of the valve seat body 101. The second guide surface 21 of the valve body 2 and the first guide surface 17 of the valve seat body 101 are clearance-fitted to prevent the assembly position between the valve seat 1 and the valve body 2 from being greatly deviated due to the void when the thread is locked. The solenoid valve adopts the valve seat 1 of the above embodiment, which increases the flow path and improves the control performance of the solenoid valve.

[0068] Optionally, refer to Figure 12 The solenoid valve also includes a valve core assembly 3, a first magnetic component 4 and a second magnetic component 5; the valve core assembly 3 is movably connected to the valve body 2, one end of the first magnetic component 4 is fixedly connected to the valve core assembly 3, and the other end is located outside the valve body 2 and movably connected to the second magnetic component 5; the first magnetic component 4 is used to drive the valve core assembly 3 to slide relative to the valve body 2 to block or open the first flow channel 14 and the second flow channel 18.

[0069] Specifically, if Figure 12 As shown, the valve core assembly 3 is slidably connected to the valve body 2 along the Z-direction. The lower end of the first magnetic member 4 is fixedly connected to the valve core assembly 3, while the upper end extends out of the second cavity 23 of the valve body 2 and is movably connected to the second magnetic member 5. The first magnetic member 4, or the moving iron core, is made of a magnetically conductive material. The second magnetic member 5, or the stationary iron core, is surrounded by a coil. When the coil is energized, a varying magnetic field is generated between it and the first magnetic member 4. This magnetic force propels the first magnetic member 4 along the Z-direction, driving the valve core assembly 3 in this direction. When the valve core assembly 3 moves in the positive Z-direction, the opening at the lower end of the valve body 2 is exposed, allowing the first and second flow channels 14 and 18 to communicate with the first cavity 11, allowing fluid to flow freely and the solenoid valve to enter the open state. When the valve core assembly 3 moves in the positive and negative directions, the opening at the lower end of the valve body 2 is blocked, preventing the first and second flow channels 14 and 18 from communicating with the first cavity 11, preventing fluid from flowing in or out of the channels and the solenoid valve to enter the closed state. Therefore, the first flow channel 14 and the second flow channel 18 are blocked or opened by the movement of the first magnetic member 4 in the magnetic field, thereby realizing the closing and opening of the solenoid valve.

[0070] Optionally, refer to Figure 12 , further comprising a first elastic member 61 and a second elastic member 62; the first elastic member 61 is arranged between the valve core assembly 3 and the valve body 2, and the second elastic member 62 is arranged between the first magnetic member 4 and the second magnetic member 5.

[0071] Specifically, if Figure 12As shown, the first elastic member 61 and the second elastic member 62 include but are not limited to elastic diaphragms, bellows, or springs. In this embodiment, metal springs are used. The first elastic member 61 is a lower spring, disposed between the valve core assembly 3 and the valve body 2, providing the valve core assembly 3 with elastic force in the positive Z direction, i.e., opening the valve. The second elastic member 62 is an upper spring, installed in the spring holes of the first magnetic member 4 and the second magnetic member 5, providing the first magnetic member 4 with elastic force in the negative Z direction, i.e., closing the valve. The elastic force of the second elastic member 62 is greater than the elastic force of the first elastic member 61. When the coil is energized, the first magnetic member 4 overcomes the elastic force of the second elastic member 62 and, with the assistance of the elastic force of the first elastic member 61, drives the valve core assembly 3 to move in the positive Z direction, thereby opening the solenoid valve. When the coil is de-energized, the first magnetic member 4 moves in the negative Z direction, i.e., closing the solenoid valve, under the action of the elastic force of the second elastic member 62.

[0072] Optionally, refer to Figure 12 , further comprising a shell 7; the shell 7 is fixedly connected to the valve body 2, the first magnetic member 4 is movably disposed inside the shell 7, and the second magnetic member 5 is fixedly connected to the inside of the shell 7.

[0073] Specifically, if Figure 12 As shown, the housing 7, or the magnetic core cover, is made of stainless steel 304 and has a cylindrical rotating body structure. The lower portion of the second magnetic member 5 is welded to the housing 7 with an interference fit, and the lower portion of the housing 7 is brazed to the valve body 2 with a clearance fit. The first magnetic member 4 is movable relative to the housing 7.

[0074] Optionally, refer to Figure 12 , further comprising a cover body 81 and an anti-loosening pad 82; a mounting groove 812 is provided inside the cover body 81, the anti-loosening pad 82 is provided between the mounting groove 812 and the valve body 2, and a threaded structure is provided outside the cover body 81.

[0075] Specifically, if Figure 12 As shown, the cover 81 is a bolt ring, and the anti-loosening washer 82 is annular and pre-installed in a T-shaped mounting groove 812 within the cover 81. The valve body 2 has an inclined surface on its upper end for contact with the anti-loosening washer 82, preventing loosening between the cover 81 and the valve body 2. The cover 81 is made of aluminum alloy 6061, with a hexagonal structure on the upper end and a third external thread 811 for threaded connection with the fixed body 100. The anti-loosening washer 82 is made of EPDM (Ethylene Propylene Diene Monomer).

[0076] Optionally, refer to Figure 12 , further comprising a first sealing member 91 and a second sealing member 92 ; the first sealing member 91 is sealedly connected to the outside of the valve seat 1 , and the second sealing member 92 is sealedly connected to the outside of the valve body 2 .

[0077] Specifically, if Figure 12 As shown, the first sealing member 91 is an internal leakage sealing ring, which is installed between the valve seat 1 and the fixed body 100 to prevent liquid leakage from the valve seat 1. The second sealing member 92 is an internal leakage sealing ring, which is installed between the valve body 2 and the fixed body 100 to prevent liquid leakage from the valve body 2. The clearance between the first guide surface 17 and the second guide surface 21 prevents the first and second sealing members 91 and 92 from being difficult to install or failing.

[0078] The present invention also provides an air conditioning system comprising the solenoid valve of any of the above embodiments. The air conditioning system is a heat pump or an air conditioner. The solenoid valve of this embodiment improves the air conditioning system's regulation efficiency and contributes to the lightweighting of the air conditioning system.

[0079] An embodiment of the present invention further provides a vehicle, comprising the solenoid valve or air conditioning system described in any one of the above embodiments.

[0080] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0081] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A valve seat (1), characterized in that: It includes a valve seat body (101); The valve seat body (101) has a first cavity (11) inside, a first hollow portion (12) is provided on a first surface of the valve seat body (101), and a second hollow portion (13) is provided on a second surface of the valve seat body (101); An included angle is formed between the first surface and the second surface, and the first hollow portion (12) and the second hollow portion (13) are both connected to the first cavity (11).

2. The valve seat according to claim 1, characterized in that The first hollow portion (12) and the second hollow portion (13) are connected to form a first flow channel (14), and the first flow channel (14) is connected to the first cavity (11).

3. The valve seat according to claim 1, characterized in that The valve seat body (101) has an opening (15) communicating with the first cavity (11), and a first thread (16) is provided inside the valve seat body (101), and the first thread (16) is located at the opening (15).

4. The valve seat according to claim 3, characterized in that The opening (15) is adjacent to the first surface, and a first guide surface (17) is provided between the first thread (16) and the first hollow portion (12), wherein the first guide surface (17) is a plane.

5. The valve seat according to claim 1, wherein: The valve seat body (101) is cylindrical, and is provided with a plurality of the first hollow portions (12) and a plurality of the second hollow portions (13) along the circumference of the valve seat body (101).

6. The valve seat according to claim 5, characterized in that The plurality of first hollow portions (12) and the plurality of second hollow portions (13) are evenly distributed along the circumference of the valve seat body (101).

7. The valve seat according to claim 1, characterized in that Also included is a flow tube (102); The flow tube (102) is connected to the valve seat body (101), and the flow tube (102) is provided with a second flow channel (18) along the axial direction, and the second flow channel (18) is communicated with the first cavity (11).

8. A solenoid valve, characterized in that: Comprising a valve body (2) and a valve seat (1) according to any one of claims 1 to 7; The valve body (2) is at least partially threadedly connected to the valve seat body (101), and a second guide surface (21) is provided on the outside of the valve body (2), and the second guide surface is clearance-matched with the first guide surface (17) inside the valve seat body (101).

9. The solenoid valve according to claim 8, characterized in that It also includes a valve core assembly (3), a first magnetic component (4) and a second magnetic component (5); The valve core assembly (3) is movably connected to the valve body (2); one end of the first magnetic member (4) is fixedly connected to the valve core assembly (3), and the other end is located outside the valve body (2) and movably connected to the second magnetic member (5); The first magnetic member (4) is used to drive the valve core assembly (3) to slide relative to the valve body (2) to block or open the first flow channel (14) and the second flow channel (18).

10. The solenoid valve according to claim 9, characterized in that It also includes a first elastic member (61) and a second elastic member (62); The first elastic member (61) is arranged between the valve core assembly (3) and the valve body (2), and the second elastic member (62) is arranged between the first magnetic member (4) and the second magnetic member (5).

11. The solenoid valve according to claim 9, characterized in that Also includes a housing (7); The housing (7) is fixedly connected to the valve body (2), the first magnetic component (4) is movably arranged inside the housing (7), and the second magnetic component (5) is at least partially fixedly connected inside the housing (7).

12. The solenoid valve according to claim 8, characterized in that It also includes a cover (81) and an anti-loosening pad (82); The cover body (81) is provided with a mounting groove (811) inside, the anti-loosening pad (82) is provided between the mounting groove (811) and the valve body (2), and the cover body (81) is provided with a threaded structure outside.

13. The solenoid valve according to claim 8, characterized in that Also includes a first sealing member (91) and a second sealing member (92); The first sealing member (91) is sealingly connected to the outside of the valve seat (1), and the second sealing member (92) is sealingly connected to the outside of the valve body (2).

14. An air conditioning system, characterized in that: The solenoid valve comprises the solenoid valve according to any one of claims 8 to 13.

15. A vehicle, characterized in that: The solenoid valve comprises the solenoid valve according to any one of claims 8 to 13 or the air conditioning system according to claim 14.

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