Sealing structure and switching valve

Abstract

A sealing structure and a switching valve. The sealing structure comprises a sealing assembly (30), and a first matching part (10) and a second matching part (20) spaced apart from each other; the second matching part (20) is provided with a through hole (22); and a low pressure region is formed in the through hole (22). The first matching part (10) and the second matching part (20) can rotate relatively, one of the first matching part (10) and the second matching part (20) is recessed and provided with a sealing recess (1001), and the sealing assembly (30) is mounted in the sealing recess (1001); a first gap (1002) is provided between the first matching part (10) and the second matching part (20), and the first gap (1002) is externally connected to a high pressure region; a second gap (1003) is provided between the side of the sealing assembly (30) facing the bottom of the sealing recess (1001) and the bottom of the sealing recess (1001), and the first gap (1002) is communicated with the second gap (1003); the sealing assembly (30) is at least provided with two sealing parts (301) spaced apart from each other, at least one sealing part (301) is located at an inner side wall of the sealing assembly (30), and the other sealing part (301) is located at the side of the sealing assembly (30) away from the bottom of the sealing recess (1001) and is abutted against and sealed with the first matching part (10) or the second matching part (20).

Description

Sealing structure and switching valve

[0001] Related applications

[0002] This application claims priority to the Chinese patent application filed on September 19, 2023, with application number 202322551815.6 and invention name “Sealing Structure and Switching Valve”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of valve sealing technology, and in particular to a sealing structure and a switching valve. Background Art

[0004] The switching valve is an essential component in a refrigeration system. It is mainly connected to the compressor. Depending on the cooling and heating modes, the compressor outlet is connected to the outdoor unit or the indoor unit. After the refrigerant circulates, it can flow back to the compressor through the switching valve.

[0005] In related art, a switching valve comprises a valve core and a valve body. The valve core has multiple flow ports, and the valve body is provided with interfaces. A driver drives the valve core to rotate, connecting the flow ports to the corresponding interfaces. During the rotation of the valve core, a seal is typically provided between the valve core and the valve body at the driver to achieve a seal during rotation. However, this seal is insufficient.

[0006] Summary of the Invention

[0007] Based on this, it is necessary to provide a sealing structure that can enhance the sealing between the valve core and the valve body when the valve core rotates to prevent fluid leakage.

[0008] A sealing structure, applied to a switching valve, includes a sealing assembly, a first matching portion and a second matching portion arranged at intervals, the second matching portion is provided with a through hole, a low-pressure zone is formed in the through hole, the first matching portion and the second matching portion are capable of rotating relative to each other, and one of the two is recessed with a sealing groove, the sealing assembly is installed in the sealing groove, the sealing groove and the sealing assembly are both arranged in a ring shape and surrounded by the through hole; a first gap is provided between the first matching portion and the second matching portion, and the first gap is connected to the high-pressure zone; a second gap is provided between the side of the sealing assembly facing the bottom of the sealing groove and the bottom of the sealing groove, and the first gap is connected to the second gap; the sealing assembly has at least two sealing portions arranged at intervals, at least one sealing portion is located at the inner side wall of the sealing assembly and abuts and seals with the side wall of the sealing groove, and the other sealing portion is located on the side of the sealing assembly away from the bottom of the sealing groove and abuts and seals with the first matching portion or the second matching portion.

[0009] It can be understood that the setting of the sealing groove is convenient for accommodating the installation of the sealing component, and the rotational sealing of the first matching part and the second matching part is realized in the sealing component to avoid fluid leakage. Specifically, the sealing component cuts off the flow path of the fluid through the setting of the sealing part to achieve a sealing effect. At the same time, the high-pressure fluid in the high-pressure area can be input into the first gap, and then input from the first gap to the second gap. Since the through hole of the second matching part forms a low-pressure area for circulating low-pressure fluid, a pressure difference is formed between the high-pressure fluid and the low-pressure fluid at the sealing component. The high-pressure fluid can push the sealing component to tightly abut the side wall of the sealing groove, enhance the sealing performance of the side wall sealing part, and push the sealing component to move toward the notch of the sealing groove. Under the action of the fluid pressure, the seal at the sealing part is also strengthened to further prevent fluid leakage.

[0010] In one embodiment, a third gap is provided between the outer side wall of the sealing assembly and the side wall of the sealing groove, and the first gap and the second gap are connected through the third gap.

[0011] It can be understood that the third gap is provided to facilitate the communication between the first gap and the second gap, so that the fluid is input into the second gap.

[0012] In one embodiment, a circulation hole is provided on the sealing assembly, and two ends of the circulation hole are respectively connected to the first gap and the second gap.

[0013] It is understandable that the provision of the flow hole can also achieve communication between the first gap and the second gap, allowing the fluid to be input into the second gap.

[0014] In one embodiment, the sealing structure includes an elastic member, and the elastic member is located in the second gap; the sealing assembly can be pressed against the first matching portion or the second matching portion under the action of the elastic member to define at least one sealing point.

[0015] It is understandable that the elastic member can generate elastic force on the sealing component, pressing the sealing component against the first matching portion or the second matching portion, thereby enhancing the sealing performance there.

[0016] In one embodiment, the elastic member is configured as a compression spring, which is located in the second gap and connected between the first fitting portion and the sealing assembly. The compression spring is used to apply pressure to the sealing assembly so that the sealing assembly is pressed against the second fitting portion.

[0017] It can be understood that the compression spring exerts an outward pushing force on the sealing assembly, thereby enabling the sealing assembly to be pressed against the second matching portion to promote sealing between the sealing assembly and the second matching portion.

[0018] In one embodiment, the sealing assembly includes a sealing block, which is provided with an assembly groove; the sealing assembly also includes a sealing ring, which is installed in the assembly groove, and a portion of the sealing ring extends out of the assembly groove to press against the groove wall of the sealing groove to define a sealing position, and the sealing ring is defined as a sealing portion.

[0019] It can be understood that the assembly groove is set to facilitate the installation of the sealing ring. The sealing ring has good deformation ability. The sealing ring is squeezed between the sealing block and the sealing groove wall to form a seal, reduce the gap, achieve sealing, and is easy to operate.

[0020] In one embodiment, the first matching portion is provided with the sealing groove, and the sealing block is provided with an inclined notch, the inclined notch is located on the side of the sealing block away from the bottom of the sealing groove, and the sealing block is pressed against the second matching portion at the top corner of the inclined notch to define a sealing portion, and the top corner is defined as another sealing portion.

[0021] It can be understood that by setting an inclined notch to form a top angle, the top angle is pressed against the second matching part to achieve sealing. Since the top angle is relatively sharp, a smaller extrusion force can make the top angle tightly abut against the second matching part, which has better sealing.

[0022] In one embodiment, along the first direction, the distance between the inclined notch and the sealing portion where the sealing ring is respectively located is 1%-5% of the size of the sealing groove.

[0023] In this way, the sealing part of the inclined notch approaches the sealing part where the sealing ring is located along the first direction, so that the pressure difference area of ​​the sealing block in the second direction is smaller, which is beneficial to reducing the pressure difference force exerted on the sealing block along the second direction, and the sealing area is reduced simultaneously, which is beneficial to appropriately reduce the rotational torque to promote the rotation between the second mating part and the second mating part.

[0024] In one embodiment, a crimping portion is protruded from one side of the second matching portion facing the first matching portion, and the first gap and the sealing groove are provided between the crimping portion and the first matching portion.

[0025] It can be understood that, by providing the crimping portion, a larger gap is provided between the first matching portion and the second matching portion except for the position where the crimping portion is located, thereby reducing interference when the two rotate relative to each other.

[0026] The present application also provides a switching valve, comprising the above-mentioned sealing structure, a valve core and a valve body; the valve core is provided with a first matching portion in the sealing structure; the valve body is provided with a second matching portion in the sealing structure, and the valve body is also provided with a valve cavity, in which the valve core is installed.

[0027] It can be understood that by using the above-mentioned sealing structure, the valve core has better sealing performance when rotating relative to the valve body, thereby preventing fluid from leaking from the through hole.

[0028] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] FIG1 is a schematic structural diagram of a first embodiment of a sealing structure provided in the present application.

[0031] FIG2 is a partial enlarged view of point A in FIG1 .

[0032] FIG3 is a partially enlarged view of the second embodiment of the sealing structure provided in this application.

[0033] FIG4 is a schematic structural diagram of a third embodiment of a sealing structure provided in the present application.

[0034] FIG5 is a schematic structural diagram of the switching valve provided in this application.

[0035] FIG6 is a partial enlarged view of point B in FIG5.

[0036] Figure markings: 1000, switching valve; 100, valve core; 200, valve body; 201, valve chamber; 300, driving member; 10, first matching part; 20, second matching part; 21, crimping part; 22, through hole; 30, sealing assembly; 301, sealing part; 31, sealing block; 311, assembly groove; 312, inclined notch; 3121, top angle; 313, flow hole; 32, sealing ring; 40, elastic member; 1001, sealing groove; 1002, first gap; 1003, second gap; 1004, third gap. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0042] Referring to Figures 1 to 4, the present application provides a sealing structure for use in a switching valve 1000, comprising a sealing assembly 30, a first mating portion 10 and a second mating portion 20 spaced apart, the second mating portion 20 being provided with a through hole 22, a low-pressure zone being formed within the through hole 22, the first mating portion 10 and the second mating portion 20 being capable of relative rotation, and one of the first mating portion 10 and the second mating portion 20 being recessed with a sealing groove 1001, the sealing assembly 30 being mounted within the sealing groove 1001, the sealing groove 1001 and the sealing assembly 30 both being arranged in an annular shape and surrounding the through hole 22; a first gap 1 is formed between the first mating portion 10 and the second mating portion 20 002, the first gap 1002 is connected to the high-pressure area; there is a second gap 1003 between the side of the sealing component 30 facing the bottom of the sealing groove 1001 and the bottom of the sealing groove 1001, and the first gap 1002 is connected to the second gap 1003; the sealing component 30 has at least two sealing parts 301 arranged at intervals, at least one sealing part 301 is located at the inner side wall of the sealing component 30, and is abutted and sealed with the side wall of the sealing groove 1001, and the other sealing part 301 is located on the side of the sealing component 30 away from the bottom of the sealing groove 1001 and is abutted and sealed with the first matching part 10 or the second matching part 20.

[0043] In this way, the first mating part 10 is provided with a through hole 22, and the low-pressure area formed by the through hole 22 can flow low-pressure fluid; the second mating part 20 is provided with a sealing groove 1001 to facilitate the installation of the sealing component 30 and support the sealing component 30. The sealing groove 1001 and the sealing component 30 are both arranged in a ring shape outside the through hole 22, so that when the first mating part 10 and the second mating part 20 are mated, the through hole 22 can be completely sealed in the circumferential direction outside the through hole 22 to avoid fluid leakage. Specifically, there is a first gap 1002 between the first matching part 10 and the second matching part 20. The high-pressure area outside the first gap 1002 can flow high-pressure fluid. The high-pressure fluid outside the through hole 22 forms a pressure difference with the low-pressure fluid inside the through hole 22. The high-pressure fluid can push the sealing component 30 toward the through hole 22. Since the sealing component 30 forms a sealing part 301 at the side wall of the sealing groove 1001, and at the same time, the first gap 1002 needs to be connected to the second gap 1003, the side wall, that is, the side wall of the sealing groove 1001 close to the through hole 22, is conducive to enhancing the sealing performance of the sealing component 30 at the sealing part 301. Furthermore, the sealing assembly 30 has a sealing portion 301 on the side away from the bottom of the groove. The high-pressure fluid in the high-pressure area can enter the first gap 1002 and then enter the second gap 1003 from the first gap 1002. Since the through hole 22 of the second matching part 20 forms a low-pressure area for the circulation of low-pressure fluid, the high-pressure fluid and the low-pressure fluid form a pressure difference at the sealing assembly 30. The high-pressure fluid can push the sealing assembly 30 and press the sealing portion 301 at the groove against the first matching part 10 or the second matching part 20.

[0044] For ease of description, the radial direction of the sealing groove 1001 is defined as the first direction, the groove depth direction of the sealing groove 1001 is defined as the second direction, the first direction is defined as the x-axis, and the second direction is defined as the y-axis.

[0045] As shown in Figures 2 to 4, in some embodiments, a third gap 1004 is defined between the outer wall of the sealing assembly 30 and the sidewall of the sealing groove 1001, and the first gap 1002 and the second gap 1003 are connected via the third gap 1004. Thus, high-pressure fluid can enter the first gap 1002 and flow into the third gap 1004, and then flow from the third gap 1004 into the second gap 1003, thereby connecting the first gap 1002 and the second gap 1003.

[0046] As shown in FIG3 , in other embodiments, the sealing assembly 30 may be provided with a flow hole 313, with both ends of the flow hole 313 respectively communicating with the first gap 1002 and the second gap 1003. In this way, high-pressure fluid can flow from the first gap 1002 into the flow hole 313, and then from the flow hole 313 into the second gap 1003. Thus, even if there is no third gap 1004 between the sealing assembly 30 and the groove wall of the sealing groove 1001, communication can be achieved to facilitate fluid flow.

[0047] As shown in Figures 2 to 4, in an optional embodiment, the sealing structure includes an elastic member 40 located in the second gap 1003. Under the action of the elastic member 40, the sealing assembly 30 can be pressed against the first mating portion 10 or the second mating portion 20 to define at least one seal. In this manner, the elastic member 40 exerts a spring force on the sealing assembly 30, causing it to move away from the elastic member 40 and abut against the first mating portion 10 or the second mating portion 20, thereby ensuring sealing of the sealing portion 301 away from the bottom of the sealing groove 1001. When no high-pressure fluid is initially flowing, the provision of the elastic member 40 can facilitate sealing of the sealing assembly 30.

[0048] For ease of explanation, the following description will be made using the example of the first mating part 10 being provided with a sealing groove 1001. In other embodiments, the second mating part 20 may also be provided with a sealing groove 1001, or both the first mating part 10 and the second mating part 20 may be provided with a sealing groove 1001. In this case, the sealing component 30 is simultaneously located in the two sealing grooves 1001. The sealing component 30 forms a sealing portion 301 in one of the sealing grooves 1001 and the side wall of the sealing groove 1001 away from the first gap 1002, and forms another sealing portion 301 in the other sealing groove 1001 and the bottom of the sealing groove 1001. The specific details are similar to the embodiment in which the first mating part 10 is provided with a sealing groove 1001, and corresponding references may be made.

[0049] In a further embodiment, the elastic member 40 is configured as a compression spring, which is located in the second gap 1003 and connected between the first mating portion 10 and the sealing assembly 30. The compression spring is used to apply pressure to the sealing assembly 30 so that the sealing assembly 30 is pressed against the second mating portion 20. In this way, the compression spring can be squeezed between the first mating portion 10 and the sealing assembly 30, thereby generating an opposite elastic force on the sealing assembly 30, pushing the sealing assembly 30 toward the second mating portion 20 and pressing it against the second mating portion 20.

[0050] As shown in Figures 2 to 4, in a specific embodiment, the sealing assembly 30 includes a sealing block 31, which is provided with a mounting groove 311. The sealing assembly 30 also includes a sealing ring 32, which is mounted in the mounting groove 311. A portion of the sealing ring 32 extends out of the mounting groove 311 to press against the groove wall of the sealing groove 1001 to define a seal. The sealing ring 32 is defined as a sealing portion 301. Thus, the mounting groove 311 is used to mount the sealing ring 32. By squeezing the sealing ring 32, the gap is reduced to achieve a seal. The operation is simple. After squeezing, the sealing ring 32 tightly fits the groove wall of the sealing groove 1001 to achieve a surface seal.

[0051] As shown in Figures 2 and 3, in a specific embodiment, the sealing block 31 is provided with an inclined notch 312. The inclined notch 312 is located on the side of the sealing block 31 away from the bottom of the sealing groove 1001. The sealing block 31 is pressed against the second mating portion 20 at the top corner 3121 of the inclined notch 312 to define a sealing point. The top corner 3121 defines another sealing portion 301. In this way, the inclined notch allows the sealing block 31 to form an inclined surface and a top corner 3121 at the inclined end. The top corner 3121 is relatively sharp, and the contact area with the second mating portion 20 is small. Applying a small force to the sealing block 31 can cause it to press against the second mating portion 20, thereby achieving better sealing performance.

[0052] As shown in FIG. 2 and FIG. 3 , in one embodiment, along the first direction, the distance between the inclined notch 312 and the sealing portion where the sealing ring 32 is respectively located is 1%-5% of the size of the sealing groove 1001 . In this way, that is to say, along the x-axis direction, the sealing point where the top corner 3121 of the inclined notch 312 is located is x1, and the sealing point where the sealing ring 32 is located is x2. The distance between x1 and x2 is 1%-5% of the size of the sealing chamber along the x-axis direction. In this way, x1 is closer to x2. Along the second direction, the force area of ​​the high-pressure fluid acting on the sealing component 30 in the first gap 1002 is slightly smaller than the force area of ​​the high-pressure fluid acting on the sealing component 30 in the second gap 1003. This makes the fluid pressure in the second gap 1003 slightly greater than the fluid pressure in the first gap 1002. In addition, the elastic force of the elastic member 40 ensures that while the top corner 3121 is pressed against the second matching part 20, the extrusion force on the second matching part 20 is appropriately reduced, so as to achieve sealing while reducing the rotational torque of the first matching part 10 and the second matching part 20 during rotation, so that the valve core 100 rotates more smoothly. In a specific embodiment, along the first direction, the distance between the inclined notch 312 and the sealing portion where the sealing ring 32 is respectively located is 1%, 3% or 5% of the size of the sealing groove 1001 .

[0053] As shown in FIG1 , in a specific embodiment, a crimping portion 21 is protruding from the side of the second mating portion 20 facing the first mating portion 10, and a first gap 1002 and a sealing groove 1001 are provided between the crimping portion 21 and the first mating portion 10. Thus, the second mating portion 20, through the protruding crimping portion 21, and the first mating portion 10, jointly squeeze the sealing assembly 30, thereby increasing the gap between the first mating portion 10 and the second mating portion 20, excluding the area where the sealing assembly 30 is located. This facilitates relative rotation between the first mating portion 10 and the second mating portion 20 and reduces rotational interference.

[0054] As shown in Figures 5 and 6, the present application also provides a switching valve 1000, comprising the aforementioned sealing structure, a valve core 100, and a valve body 200. The valve core 100 is provided with a first mating portion 10 of the sealing structure; the valve body 200 is provided with a second mating portion 20 of the sealing structure. The valve body 200 is further provided with a valve cavity 201, in which the valve core 100 is mounted. The valve core 100 rotates within the valve cavity 201. The valve core 100 is configured with at least two fluid channels arranged at intervals. The valve body 200 is configured with an interface. The rotation of the valve core 100 switches between different fluid channels and the interface. At the same time, the valve cavity 201 is filled with a high-pressure fluid, which can communicate with the first gap 1002 in the sealing structure to enhance the sealing performance of the sealing assembly 30. In actual use, the driving member 300 passes through the through hole 22 of the valve body 200 and connects to the valve core 100, driving the valve core 100 to rotate. The through hole 22 is connected to the external environment, which forms a low-pressure area compared to the valve cavity 201. The sealing assembly 30 is provided between the valve body 200 and the valve core 100 to form a seal and prevent fluid leakage at all locations in the through hole 22. In a specific embodiment, the switching valve 1000 can be configured as a three-way valve, a four-way valve, etc.

[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A sealing structure, applied to a switching valve, characterized in that: It includes a sealing component, a first matching part and a second matching part arranged at intervals, the second matching part is provided with a through hole, a low-pressure zone is formed in the through hole, the first matching part and the second matching part can rotate relative to each other, and one of the two is recessed with a sealing groove, the sealing component is installed in the sealing groove, the sealing groove and the sealing component are both arranged in a ring shape and surrounded by the through hole; a first gap is provided between the first matching part and the second matching part, and the first gap is connected to the high-pressure zone; a second gap is provided between the side of the sealing component facing the bottom of the sealing groove and the bottom of the sealing groove, and the first gap is connected to the second gap; the sealing component has at least two sealing parts arranged at intervals, at least one sealing part is located at the inner side wall of the sealing component and abuts and seals with the side wall of the sealing groove, and the other sealing part is located on the side of the sealing component away from the bottom of the sealing groove and abuts and seals with the first matching part or the second matching part.

2. The sealing structure according to claim 1, wherein: A third gap is defined between the outer side wall of the sealing assembly and the side wall of the sealing groove, and the first gap is connected to the second gap through the third gap.

3. The sealing structure according to claim 1, wherein: The sealing component is provided with a circulation hole, and two ends of the circulation hole are respectively connected with the first gap and the second gap.

4. The sealing structure according to claim 2 or 3, wherein: The sealing structure comprises an elastic member, and the elastic member is located in the second gap; The sealing assembly can be pressed against the first matching portion or the second matching portion under the action of the elastic member to define at least one sealing point.

5. The sealing structure according to claim 4, wherein: The elastic member is configured as a compression spring, which is located in the second gap and connected between the first matching portion and the sealing assembly. The compression spring is used to apply pressure to the sealing assembly so that the sealing assembly is pressed against the second matching portion.

6. The sealing structure according to claim 4, wherein: The sealing assembly includes a sealing block, which is provided with an assembly groove; the sealing assembly also includes a sealing ring, which is installed in the assembly groove, and a portion of the sealing ring extends out of the assembly groove to press against the groove wall of the sealing groove to define a sealing position, and the sealing ring is defined as a sealing portion.

7. The sealing structure according to claim 6, wherein: The first matching part is provided with the sealing groove, and the sealing block is provided with an inclined notch, the inclined notch is located on the side of the sealing block away from the bottom of the sealing groove, and the sealing block is pressed against the second matching part at the top corner of the inclined notch to define a sealing point, and the top corner is defined as another sealing part.

8. The sealing structure according to claim 7, wherein: Along the first direction, the distance between the inclined notch and the sealing position where the sealing ring is respectively located is 1%-5% of the size of the sealing groove.

9. The sealing structure according to claim 7, wherein: A crimping portion is protruded from one side of the second matching portion toward the first matching portion, and the first gap and the sealing groove are arranged between the crimping portion and the first matching portion.

10. A switching valve, characterized in that: include: The sealing structure according to any one of claims 1 to 9; A valve core, provided with a first matching portion in the sealing structure; The valve body is provided with the second matching part in the sealing structure, and the valve body is also provided with a valve cavity, and the valve core is installed in the valve cavity.

Images