Valve seat and valve

Abstract

The utility model provides a valve seat. The valve seat comprises a first channel and a second channel. One end of the first channel is provided with a first hole for connecting a first outlet pipeline; the second hole is communicated with the inner cavity of the valve; on a plane perpendicular to the axis of the first hole, the projection of the second hole is within the projection of the first hole. One end of the second channel is provided with a third hole for connecting a second outlet pipeline, and the other end is provided with a fourth hole for communicating with the inner cavity of the valve; on a second plane perpendicular to the axis of the third hole, the projection of the fourth hole is in the projection of the third hole. Wherein the minimum distance between the hole wall of the second hole and the hole wall of the fourth hole is equal to the minimum distance between the hole wall of the first hole and the hole wall of the third hole. According to the valve seat, larger runner switching can be achieved with smaller pulling force and shorter stroke.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to a valve with a valve seat. Background Art

[0002] The switching valve is a control device used in refrigeration equipment. The switching valve in the related art mainly uses a method of driving a slider to slide between valve ports to switch the flow channel. However, the sliding stroke of the slider is long when the flow channel is switched, resulting in a long switching time of the solenoid valve. Summary of the invention

[0003] A main purpose of the present application is to overcome the defects of the above-mentioned prior art and provide a valve seat and a valve with a shorter switching stroke.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] According to one aspect of the present application, a valve seat is provided, which includes a first channel and a second channel. One end of the first channel has a first hole for connecting to a first outlet pipeline; the other end has a second hole for communicating with the inner cavity of the valve; the diameter of the first hole is larger than the diameter of the second hole, and the projection of the second hole is within the projection of the first hole on a plane perpendicular to the axis of the first hole. One end of the second channel has a third hole for connecting to a second outlet pipeline, and the other end has a fourth hole for communicating with the inner cavity of the valve; the diameter of the third hole is larger than the diameter of the fourth hole, and the projection of the fourth hole is within the projection of the third hole on a second plane perpendicular to the axis of the third hole. The minimum distance between the hole wall of the second hole and the hole wall of the fourth hole is equal to the minimum distance between the hole wall of the first hole and the hole wall of the third hole.

[0006] According to one embodiment of the present application, the flow area of ​​one end of the second hole connected to the first hole is larger than the flow area of ​​the other end; the flow area of ​​one end of the fourth hole connected to the third hole is larger than the flow area of ​​the other end.

[0007] According to one embodiment of the present application, the hole wall of the second hole away from the fourth hole is inclined toward the fourth hole in the direction from one end connected to the first hole to the other end and / or the hole wall of the fourth hole away from the second hole is inclined toward the second hole in the direction from one end connected to the third hole to the other end.

[0008] According to one embodiment of the present application, the hole wall of the second hole away from the fourth hole includes a first straight segment, a first inclined segment, and a second straight segment in a direction from one end connected to the first hole to the other end, wherein the first inclined segment connects the first straight segment and the second straight segment and / or; the hole wall of the fourth hole away from the second hole includes a third straight segment, a second inclined segment, and a fourth straight segment in a direction from one end connected to the third hole to the other end, wherein the second inclined segment connects the third straight segment and the fourth straight segment.

[0009] According to one embodiment of the present application, the hole wall of the second hole away from the fourth hole is arranged in a stepped shape in a direction from one end connected to the first hole to the other end and / or; the hole wall of the fourth hole away from the second hole is arranged in a stepped shape in a direction from one end connected to the third hole to the other end.

[0010] According to one embodiment of the present application, the hole wall of the second hole close to the fourth hole and the hole wall of the fourth hole close to the second hole are arranged straight.

[0011] According to one embodiment of the present application, the second holes and the fourth holes are both plural, and an arrangement direction of the second holes is parallel to an arrangement direction of the fourth holes.

[0012] According to one embodiment of the present application, the second hole and the fourth hole are configured as waist-shaped holes.

[0013] According to one of the embodiments of the present application, the valve seat has a surface connected to the inner cavity of the valve, and a portion of the surface including the second hole and the fourth hole is a plane.

[0014] According to another aspect of the present application, a valve is provided, comprising the valve seat as above, wherein the first hole and the third hole of the valve seat are respectively connected to an outlet pipeline connecting pipe, and the connecting pipe has a bend.

[0015] It can be seen from the above technical solution that the advantages and positive effects of the valve seat proposed in this application are:

[0016] The valve seat proposed in the present application includes a first channel and a second channel formed by a large hole at one end and a small hole at the other end, and the large hole and the small hole are connected to form. The large hole is connected to the outlet pipeline pipe, and the small hole is used to connect the inner cavity of the valve. On the plane perpendicular to the axis of the large hole, the projection of the small hole is within the projection of the large hole. The minimum distance between the hole walls of the two small holes is equal to the minimum distance between the hole walls of the two large holes. Such a design can make the two small holes located at the closest position to each other, which is conducive to reducing the fluid channel switching stroke. The present application can also achieve the switching of the flow channel without the need to detach from the valve port, thereby making the pulling force required to switch the flow channel smaller, greatly improving the flow channel switching ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various objects, features and advantages of the present application will become more apparent by considering the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present application and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a valve seat according to an embodiment of the present application.

[0019] Figure 2 yes Figure 1 main view.

[0020] Figure 3 yes Figure 2 AA cross-section diagram of .

[0021] Figure 4 It is a front view of another embodiment of the valve seat of the present application.

[0022] Figure 5 yes Figure 4 Schematic diagram of the BB cross section.

[0023] Figure 6 yes Figure 4 Rear view of.

[0024] Figure 7 This is the third embodiment of the valve seat of the present application (see the front view for details). Figure 4 ) is a schematic diagram of the BB cross section.

[0025] Figure 8 This is the fourth embodiment of the valve seat of the present application (see the front view for details). Figure 4 ) is a schematic diagram of the BB cross section.

[0026] Fig. 9 It is a schematic diagram of the structure of the valve of the present application.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Valve;

[0029] 10. Valve seat;

[0030] 11. Take over the inlet pipeline;

[0031] 12. Take over the first outlet pipeline;

[0032] 13. Connect the second outlet pipeline;

[0033] 14. Slider;

[0034] 15. Core iron;

[0035] 16. Bracket;

[0036] 17. Reed;

[0037] 18. Core iron spring;

[0038] 19. Rivets;

[0039] 20. Magnetic ring;

[0040] 21. Attractor;

[0041] 22. Casing;

[0042] 23. Valve cover;

[0043] 100. First channel;

[0044] 101. First hole;

[0045] 102. Second hole;

[0046] 1021. The first straight paragraph;

[0047] 1022. The first inclined section;

[0048] 1023. The second straight section;

[0049] 200. Second channel;

[0050] 201. The third hole;

[0051] 202. The fourth hole;

[0052] 2021. The third straight section;

[0053] 2022. Second inclined section;

[0054] 2023. The fourth straight section;

[0055] 300. Limiting steps;

[0056] 400. Surface. DETAILED DESCRIPTION

[0057] Typical embodiments that embody the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments without departing from the scope of the present application, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present application.

[0058] In the following description of different exemplary embodiments of the present application, reference is made to the accompanying drawings, which form a part of the present application, and in which different exemplary structures, systems and steps that can realize multiple aspects of the present application are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present application. When introducing the elements / components / etc. described and / or illustrated herein, the terms "first", "second" and "third" etc. are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. Although the terms "upper", "lower", "between" etc. can be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be understood as requiring a specific three-dimensional direction of the structure to fall within the scope of the present application.

[0059] like Figures 1 to 3 As shown, the valve seat 10 of the present application includes a first channel 100 and a second channel 200. One end of the first channel 100 has a first hole 101 for connecting the first outlet pipeline; the other end has a second hole 102 for connecting the inner cavity of the valve; the diameter of the first hole 101 is greater than the diameter of the second hole 102. One end of the second channel 200 has a third hole 201 for connecting the second outlet pipeline, and the other end has a fourth hole 202 for connecting the inner cavity of the valve; the diameter of the third hole 201 is greater than the diameter of the fourth hole 202, that is, the first hole 101 and the third hole 201 are larger holes, and the second hole 102 and the fourth hole 202 are smaller holes. Designing the fluid channel to be small at the inlet and large at the outlet can maximize the use of the area of ​​the fluid channel, reduce the flow resistance of the fluid channel, and increase the flow rate of the three-way valve.

[0060] On a plane perpendicular to the axis of the first hole 101, the projection of the second hole 102 is within the projection of the first hole 101. On a second plane perpendicular to the axis of the third hole 201, the projection of the fourth hole 202 is within the projection of the third hole 201. Ensuring that the projection of the small hole is within the projection of the large hole can avoid collision when the fluid passes through, avoid turbulence, eddy currents and other phenomena caused by external impact inside the fluid, make the passing fluid relatively smooth and stable, and help improve the efficiency of fluid passage.

[0061] The minimum distance between the hole wall of the second hole 102 and the hole wall of the fourth hole 202 is equal to the minimum distance between the hole wall of the first hole 101 and the hole wall of the third hole 201. In this way, the two small holes can be located at the closest position to each other, which is conducive to reducing the fluid channel switching stroke.

[0062] The present application can also achieve the switching of the flow channel without having to disengage the valve port, thereby making the pulling force required for switching the flow channel smaller and enhancing the flow channel switching capability.

[0063] like Figures 4 to 6 As shown, in other embodiments, the flow area of ​​one end of the second hole 102 of the present application connected to the first hole 101 is larger than the flow area of ​​the other end of the second hole 102; the flow area of ​​one end of the fourth hole 202 connected to the third hole 201 is larger than the flow area of ​​the other end of the fourth hole 202. The second hole 102 and the fourth hole 202 are designed to have a small opening at one end and a large opening at the other end, and are in a form of increasing from small to large along the fluid flow direction, which is conducive to reducing the pressure loss during the fluid flow process.

[0064] In this embodiment, the hole wall of the second hole 102 away from the fourth hole 202 is inclined toward the fourth hole 202 in the direction from one end connected to the first hole 101 to the other end. In this embodiment, the hole wall of the fourth hole 202 away from the second hole 102 is inclined toward the second hole 102 in the direction from one end connected to the third hole 201 to the other end. The inclined gradual hole wall setting can reduce the pressure loss during the fluid flow process and is easy to process.

[0065] The second hole 102 and the fourth hole 202 may be arranged one with an inclination and the other with a non-inclination, or both may be arranged with an inclination.

[0066] like Figure 7 As shown, the hole wall of the second hole 102 away from the fourth hole 202 includes a first straight section 1021, a first inclined section 1022 and a second straight section 1023 in the direction from one end connected to the first hole 101 to the other end, wherein the first inclined section 1022 connects the first straight section 1021 and the second straight section 1023. In this embodiment, the hole wall of the fourth hole 202 away from the second hole 102 includes a third straight section 2021, a second inclined section 2022 and a fourth straight section 2023 in the direction from one end connected to the third hole 201 to the other end, wherein the second inclined section 2022 connects the third straight section 2021 and the fourth straight section 2023. The design of the segmented hole wall can also reduce the pressure loss during the flow of the fluid, alleviate the disturbance during the flow of the fluid, and improve the efficiency of the fluid passing.

[0067] The second hole 102 and the fourth hole 202 may be arranged in three sections, one or not, or both may be arranged in three sections.

[0068] like Figure 8 As shown, the hole wall of the second hole 102 away from the fourth hole 202 is arranged in a step-like manner in the direction from one end connected to the first hole 101 to the other end. In this embodiment, the hole wall of the fourth hole 202 away from the second hole 102 is arranged in a step-like manner in the direction from one end connected to the third hole 201 to the other end. The stepped arrangement can also reduce fluid pressure loss.

[0069] The second hole 102 and the fourth hole 202 may be arranged in a stepped shape, or both may be arranged in a stepped shape.

[0070] In the above embodiments, referring to Figures 1 to 8 The hole wall of the second hole 102 close to the fourth hole 202 and the hole wall of the fourth hole 202 close to the second hole 102 are arranged straight. Such a design can simplify the processing technology, reduce costs and improve production efficiency; and can make the two small holes located at the closest position to each other, which is conducive to reducing the fluid channel switching stroke.

[0071] In the above embodiments, reference can be made to Figures 1 to 3 , the second holes 102 and the fourth holes 202 are both multiple, and the arrangement direction of the second holes 102 is parallel to the arrangement direction of the fourth holes 202. Figures 1 to 3 In the embodiment, the second hole 102 and the fourth hole 202 are both 2, and in some other embodiments, they can also be 3, 5, etc. The provision of multiple holes can increase the flow rate of the fluid passing through, improve the circulation efficiency of the three-way valve, increase the fluid flow rate, and increase the driving force.

[0072] like Figures 4 to 8 As shown, the second hole 102 and the fourth hole 202 are configured as waist-shaped holes. The waist-shaped holes can realize the expansion of the fluid channel, are easy to process, and will not affect the overall strength of the valve seat 10.

[0073] like Figures 1 to 8 The valve seat 10 has a surface 400 connected to the inner cavity of the valve, and the portion of the surface 400 including the second hole 102 and the fourth hole 202 is a plane. The design of the plane enables the slider to slide in a sealed manner on the surface 400, which is convenient for switching the fluid channel. The valve seat 10 has a limiting step 300, which is used to limit the movement of the core iron of the valve. The limiting step 300 is simple and effective to limit the movement of the core iron, which can extend the service life of the core iron, and thus extend the service life of the entire valve.

[0074] like Fig. 9As shown, the present application also provides a valve 1, comprising two outlet pipes 12, 13 and an inlet pipe 11, a slider 14 and the above valve seat 10, wherein the first hole 101 and the third hole 201 of the valve seat 10 are respectively connected to the outlet pipes 12, 13, and the pipes 12, 13 have a bend. The valve of the present application uses the slider 14 to switch between the first channel 100 and the second channel 200 of the valve seat 10, and the switching of the flow channel does not need to be carried out by disengaging from the valve port, which is conducive to improving the overall working capacity of the valve.

[0075] like Fig. 9 As shown, the valve 1 of the present application also includes a sleeve 22, a valve cover 23 is arranged at one end of the sleeve 22, and the inlet pipeline pipe 11 is connected to the inner cavity of the valve 1 through the valve cover 23. The other end of the sleeve 22 is provided with an attractor 21, a magnetic ring 20, a core iron spring 18, a core iron 15, a rivet 19 and a bracket 16 in sequence. The core iron spring 18 is fixed to the attractor 21 and is arranged inside one end of the core iron 15. The other end of the core iron 15 is provided with a rivet 19 and a bracket 16. A slider 14 is arranged on the bracket 16, one side of the slider 14 is in sealing contact with the valve seat 10, and a reed 17 is arranged on the other side. The attractor 21 can drive the core iron 15 to move up and down to realize the up and down movement of the slider 14 relative to the valve seat 10, thereby realizing the switching of the channel of the valve seat 10.

[0076] In this exemplary embodiment, the valve seat proposed in this application is described by taking the application of a three-way valve as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of this application to other types of valves, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the valve seat proposed in this application.

[0077] It should be noted that the valve seats shown in the drawings and described in this specification are only a few examples of the many types of valve seats that can adopt the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any details or any components of the valve seats shown in the drawings or described in this specification.

[0078] The above is a detailed description of several exemplary embodiments of the valve seat 10 proposed in the present application. The following is an exemplary description of the use process of the valve seat 10 proposed in the present application.

[0079] Combined with Figures 1 to 8The valve seat 10 proposed in the present application is installed at the valve port of a direct-acting three-way solenoid valve, wherein the first hole 101 and the third hole 201 of the valve seat 10 are connected to the outlet pipeline connecting pipe, and the second hole 102 and the fourth hole 202 can be connected to the inlet pipeline by sliding a slider arranged on the surface 400 of the valve seat 10. The slider is located in the valve cavity, and the inlet pipeline is arranged at an inlet of the valve cavity. The fluid pressure of the inlet pipeline is always greater than the fluid pressure of the two outlet pipelines. The slider seal is arranged on the surface 400 of the valve seat 10 and can slide along the surface 400. During use, the core iron drives the slider to slide along the surface 400 of the valve seat 10 to realize the switching of the first channel 100 and the second channel 200 to be connected with the inlet pipeline. The specific use process is as follows:

[0080] In the initial state, the slider is in a state of blocking the second channel 200, the second hole 102 of the upper first channel 100 is opened, connecting the inlet pipeline and the first outlet pipeline, and the fluid flows out through the first channel 100 of the valve seat 10. When it is necessary to switch the channel, the core iron drives the slider to slide upward along the surface 400 of the valve seat 10, so that the slider blocks the second hole 102 of the first channel 100, opens the fourth hole 202 of the second channel 200, connects the inlet pipeline and the second outlet pipeline, and the fluid flows out through the second channel 200 of the valve seat 10. When it is necessary to switch again, the core iron drives the slider to slide downward, blocks the fourth hole of the second channel 200, opens the second hole 102 of the upper first channel 100, connects the inlet pipeline and the first outlet pipeline, and the fluid flows out through the first channel 100 of the valve seat 10.

[0081] Through the above-mentioned use process of the valve seat of the present application, it can be concluded that the valve seat 10 of the present application designs the fluid channel into a first channel 100 and a second channel 200 that are small at the inlet and large at the outlet, which can maximize the use of the area of ​​the fluid channel and improve the flow rate of the three-way valve. The large hole is connected to the outlet pipeline pipe, and the small hole is used to connect the inlet pipe. On the plane perpendicular to the axis of the large hole, the projection of the small hole is within the projection of the large hole. The minimum distance between the hole walls of the two small holes is equal to the minimum distance between the hole walls of the two large holes. Such a design can make the two small holes located at the closest position to each other, reduce the fluid channel switching stroke, reduce the pulling force required to switch the flow channel, and greatly improve the flow channel switching ability of the direct-acting three-way solenoid valve.

[0082] In summary, the valve seat 10 proposed in the present application includes a first channel 100 and a second channel 200. The first channel 100 has a first hole 101 at one end for connecting to a first outlet pipeline; and a second hole 102 at the other end for connecting to an inlet pipeline of a valve; the diameter of the first hole 101 is greater than the diameter of the second hole 102, and on a plane perpendicular to the axis of the first hole 101, the projection of the second hole 102 is within the projection of the first hole 101. The second channel 200 has a third hole 201 at one end for connecting to a second outlet pipeline, and a fourth hole 202 at the other end for connecting to an inlet pipeline of a valve; the diameter of the third hole 201 is greater than the diameter of the fourth hole 202, and on a second plane perpendicular to the axis of the third hole 201, the projection of the fourth hole 202 is within the projection of the third hole 201. The minimum distance between the hole wall of the second hole 102 and the hole wall of the fourth hole 202 is equal to the minimum distance between the hole wall of the first hole 101 and the hole wall of the third hole 201. The two small holes can be located at the closest position to each other, which is conducive to reducing the fluid channel switching stroke. The present application can also achieve the switching of the flow channel without detaching from the valve port, but by sliding the slider on the surface of the valve seat, which can reduce the pulling force required for switching the flow channel.

[0083] The exemplary embodiments of the valve seat proposed in the present application are described and / or illustrated in detail above. However, the embodiments of the present application are not limited to the specific embodiments described herein. Instead, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "an", and "above" are used to indicate the presence of one or more elements / components / etc.

[0084] The embodiments of the present application are not limited to the specific embodiments described herein, on the contrary, the components of each embodiment can be used independently and separately from the other components described herein. Each component of an embodiment can also be used in combination with other components of other embodiments. In the description of this specification, the description of the terms "one embodiment", "some embodiments", "other embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] In the embodiments, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments can be understood according to the specific circumstances.

[0086] Although the valve seat proposed in the present application has been described in terms of various specific embodiments, those skilled in the art will recognize that the application can be practiced with modification within the spirit and scope of the claims.

Claims

1. A valve seat, characterized in that: include: A first channel, wherein one end of the first channel has a first hole for connecting to a first outlet pipeline; The other end has a second hole for communicating with the inner cavity of the valve; the diameter of the first hole is larger than the diameter of the second hole, and on a plane perpendicular to the axis of the first hole, the projection of the second hole is within the projection of the first hole; a second channel, wherein one end of the second channel has a third hole for connecting to a second outlet pipeline, and the other end of the second channel has a fourth hole for communicating with an inner cavity of the valve; the diameter of the third hole is larger than the diameter of the fourth hole, and on a plane perpendicular to the axis of the third hole, the projection of the fourth hole is within the projection of the third hole; The minimum distance between the hole wall of the second hole and the hole wall of the fourth hole is equal to the minimum distance between the hole wall of the first hole and the hole wall of the third hole.

2. The valve seat according to claim 1, characterized in that: The flow area of ​​one end of the second hole connected to the first hole is larger than the flow area of ​​the other end; the flow area of ​​one end of the fourth hole connected to the third hole is larger than the flow area of ​​the other end.

3. The valve seat according to claim 2, characterized in that: The hole wall of the second hole away from the fourth hole is inclined toward one side of the fourth hole in the direction from one end connected to the other end of the first hole, and / or; The hole wall of the fourth hole away from the second hole is inclined toward the second hole in a direction from one end to the other end of the third hole.

4. The valve seat according to claim 2, characterized in that: The hole wall of the second hole away from the fourth hole comprises a first straight section, a first inclined section and a second straight section in sequence in a direction from one end connected to the first hole to the other end, wherein the first inclined section connects the first straight section and the second straight section, and / or; The hole wall of the fourth hole away from the second hole includes a third straight segment, a second inclined segment and a fourth straight segment in sequence in the direction from one end connected to the third hole to the other end, wherein the second inclined segment connects the third straight segment and the fourth straight segment.

5. The valve seat according to claim 2, characterized in that: The hole wall of the second hole away from the fourth hole is arranged in a step-like manner in a direction from one end connected to the first hole to the other end, and / or; The hole wall of the fourth hole away from the second hole is arranged in a step-like manner in a direction from one end connected to the third hole to the other end.

6. The valve seat according to any one of claims 1 to 5, characterized in that: The hole wall of the second hole close to the fourth hole and the hole wall of the fourth hole close to the second hole are arranged straight.

7. The valve seat according to any one of claims 1 to 5, characterized in that: There are multiple second holes and multiple fourth holes, and the arrangement direction of the second holes is parallel to the arrangement direction of the fourth holes.

8. The valve seat according to any one of claims 1 to 5, characterized in that: The second hole and the fourth hole are configured as waist-shaped holes.

9. The valve seat according to any one of claims 1 to 5, characterized in that: The valve seat has a surface communicating with the inner cavity of the valve, and a portion of the surface including the second hole and the fourth hole is a plane.

10. A valve, characterized in that: It comprises the valve seat as described in any one of claims 1 to 9, wherein the first hole and the third hole of the valve seat are respectively connected to the outlet pipeline connecting pipe, and the connecting pipe has a bend.

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