Stop valve and its cooling system

Abstract

Stop valves and their cooling systems. The stop valve 100 includes a valve body 10 and a valve core 20. The valve body 10 is provided with a valve core end 17, a first opening 11, and a second opening 13. The first opening 11 is used to connect to a first communicating pipe 12, and the second opening 13 is used to connect to a second communicating pipe 14. The central axis of the valve core end 17 and the central axis of the second opening 13 form an acute angle β. Let X be the maximum distance along the axial direction of the valve body 10 between the plane on which the end face of the valve core 20 facing the first opening 11 is located and the inner wall of the second opening 13. Let Y be the smaller of the inner diameters of the second opening 13 and the second communicating pipe 14. The maximum distance X and the inner diameter Y satisfy the relationship X≧0.8×Y / sinβ.

Description

[Technical field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on March 15, 2022, bearing application number 202220562380.8 and titled "Stop valve and cooling system thereof", the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD This application relates to the field of refrigeration, and in particular to stop valves and cooling systems thereof. [Background technology]

[0003] In a cooling system, a stop valve plays an important role in blocking and throttling the medium in the pipeline in which it is located. The opening and closing member of the stop valve is a valve core, and it is mainly used for blocking the medium in a low temperature environment.

[0004] The related stop valve is prone to problems of low flow efficiency of the medium in the valve body and insufficient flow amount, which affects the flow of the medium in the pipeline and the realization of the function of the cooling system. Summary of the Invention

[0005] According to various embodiments of the present application, a stop valve is provided.

[0006] The stop valve includes a valve body and a valve core. The valve core is located in the valve body and can move along the axial direction of the valve body to open and close the stop valve. The valve body is provided with a valve core end, a first opening and a second opening. The first opening is used to connect to a first communicating pipe and the second opening is used to connect to a second communicating pipe. An included angle between a central axis of the valve core end and a central axis of the second opening is β, the included angle β is an acute angle. The valve core has a first state for opening the stop valve. When the valve core is in the first state, a maximum distance along the axial direction of the valve body between a plane on which an end face of the valve core facing the first opening is located and an inner wall of the second opening is X, and a smaller inner diameter of an inner diameter of the second opening and an inner diameter of the second communicating pipe is Y, where the maximum distance X and the inner diameter Y satisfy a relational formula of X≧0.8×Y / sinβ.

[0007] In one embodiment, the included angle β is between 60° and 70°.

[0008] In one embodiment, the included angle β is 65° and / or the maximum distance X and the inner radius Y satisfy the relationship X=0.8×Y / sin β.

[0009] In one embodiment, the first opening and the second opening have equal inner diameters; And / or, the first communicating pipe and the second communicating pipe have the same inner diameter.

[0010] In one embodiment, the valve body includes a valve seat, the valve seat is disposed at the first opening, a valve port is formed in the valve seat, the valve core is capable of opening and closing the valve port, the valve seat includes a first segment and a second segment, an inner diameter of the first segment is smaller than an inner diameter of the second segment, thereby forming a first step, and the first communicating tube enters the valve seat and abuts against the first step.

[0011] In one embodiment, when the first opening and the valve body are coaxially arranged, the included angle between the axis of the second opening and the axis of the first opening is defined as α, and the included angle α is 110° to 120°. When the stop valve is in the first state, the maximum distance along the axial direction of the valve body between a plane on which the end face of the valve core facing the first opening is located and the inner wall of the second opening is defined as X, and the smaller inner diameter of the second opening and the second communicating tube is defined as Y, and the maximum distance X and the inner diameter Y satisfy the relational expression X≧0.8×Y / sin(180-α).

[0012] In one embodiment, the included angle α is 115° and / or the maximum distance X and the inner radius Y satisfy the relationship X=0.8×Y / sin(180−α).

[0013] In one embodiment, the inner wall of the second opening includes a third segment and a fourth segment, the inner diameter of the third segment is larger than the inner diameter of the fourth segment, a second step is provided between the third segment and the fourth segment, one end of the second communicating tube abuts the second step, and the inner diameter of the second opening is the inner diameter of the fourth segment.

[0014] In one embodiment, a sealing member is provided between the valve core and the valve body, the sealing member surrounds the outer peripheral side of the valve core and abuts against the inner wall of the valve body, and a limiting portion is provided on the valve body, and when the distance between the valve core and the first opening is maximum, the limiting portion abuts against the valve core.

[0015] According to various embodiments of the present application, there is further provided a cooling system including the above-mentioned stop valve, the stop valve being attached to a medium passage of the cooling system to control blocking and flow of the medium passage and used to replenish medium to the cooling system.

[0016] The details of one or more embodiments of the present application are set forth in the drawings and description that follow to make further features, objects and advantages of the present application more concise and easier to understand. [Brief description of the drawings]

[0017] To better describe and explain the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings, in which additional details or examples used to explain the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described herein, and the best mode of these inventions as understood herein.

[0018] [Figure 1] FIG. 2 is a front cross-sectional view of a stop valve according to an embodiment of the present application. [Diagram 2] FIG. 2 is a front view of a stop valve according to an embodiment of the present application. [Diagram 3] FIG. 2 is a left side view of a stop valve according to an embodiment of the present application. [Figure 4] FIG. 2 is a top view of a stop valve according to an embodiment of the present application. [Diagram 5] FIG. 2 is a perspective view of a stop valve according to an embodiment of the present application. [Figure 6] FIG. 2 is a schematic diagram of a cooling system according to an embodiment of the present application.

[0019] In the drawings, the meanings of the symbols are as follows: 100 stop valve, 10 valve body, 11 first opening, 12 first connecting pipe, 13 second opening, 131 second step, 132 third segment, 133 fourth segment, 14 second connecting pipe, 15 valve seat, 151 valve port, 152 first step, 153 first segment, 154 second segment, 16 restriction portion, 17 valve core end, 20 valve core, 21 groove, 22 sealing member, 23 guide segment, 30 valve assembly, 31 end cover, 32 valve core, 33 passage, 34 connection body, 200 cooling system, 210 medium passage. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In order to make the above objects, features and advantages of the present application clearer and easier to understand, the following describes in detail the specific embodiments of the present application with reference to the drawings. In the following description, various specific details are described in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other aspects different from those described herein, and those skilled in the art can make similar improvements without going against the content of the present application, so the present application is not limited by the specific examples disclosed below.

[0021] It should be explained that when an assembly is referred to as being "fixed" or "mounted" on another assembly, it may be directly fixed to the other assembly or there may be an intervening assembly present. When an assembly is referred to as being "connected" to another assembly, it may be directly connected to the other assembly or there may be an intervening assembly present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for descriptive purposes only and do not represent the only embodiments.

[0022] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying a relative importance or implicitly designating the number of technical features depicted. Thus, a feature qualified with "first" or "second" may explicitly state or implicitly include at least one of that feature. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless explicitly and specifically limited.

[0023] In this application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," and "upper side" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "lower side" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. Herein, the terms used in the specification of this application are merely intended to describe specific embodiments and are not intended to limit the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] The related stop valve is prone to problems of low flow efficiency of the medium in the valve body and insufficient flow rate, which affects the flow of the medium in the pipeline and the realization of the function of the cooling system. Although some stop valves have a specified angle range of the included angle between the inlet and the outlet, the specified range is still relatively wide, and in actual application scenarios, even a small change in the included angle angle has a large impact on the flow efficiency of the medium, so the related stop valve still cannot solve the problem of low flow efficiency of the medium in the valve body.

[0026] 1 to 5, in order to solve the above technical problems, the present application provides a stop valve 100, which is applied to a cooling system and plays an important role of blocking and throttling a medium in a pipeline in which it is located, and the medium refers to a refrigerant. It goes without saying that in other embodiments, the stop valve 100 may be used in other working environments, such as a waterway system, to play a role of blocking the medium.

[0027] Referring to FIG. 1, FIG. 1 is a front cross-sectional view of a stop valve 100 provided by the present application, which includes a valve body 10 and a valve core 20, where the valve core 20 is located in the valve body 10 and can move along the axial direction of the valve body 10, and is used to open and close the stop valve 100.

[0028] The valve body 10 is provided with a first opening 11 and a second opening 13, and the medium flows between the first opening 11 and the second opening 13. In this embodiment, the first opening 11 and the valve body 10 are arranged coaxially, which makes it easy to process the valve body 10, and the first opening 11 and the valve body 10 can be processed and formed at the same time, eliminating the need for a separate eccentricity process and saving costs.

[0029] Specifically, the first opening 11 and the second opening 13 have the same inner diameter, so that the inner diameter of the first opening is much smaller than the inner diameter of the second opening, or vice versa, to avoid throttling due to small flow. When the inner diameters of the first opening and the second opening are equal, the flow efficiency of the medium in the chamber can reach its maximum.

[0030] The included angle α between the axis of the first opening 11 and the axis of the second opening 13 is 110°-120°, so that the flow efficiency of the medium can be ensured when the medium flows between the first opening 11 and the second opening 13. When the included angle α is maintained at 110°-120°, the flow efficiency can be maximized. When the included angle is less than 110° or more than 120°, both of them will affect the flow efficiency of the medium and even cause the problem of insufficient flow rate. It should be noted that the included angle α between the axis of the first opening 11 and the axis of the second opening 13 is the included angle between the axial direction of the first opening 11 away from the valve core 20 and the axial direction of the second opening 13 away from the valve body 10, that is, the medium enters the valve body 10 from the first opening 11 and flows out of the second opening 13, and rotates by an angle of 180°-α, and the direction change is acute, so that the resistance in the flow process of the medium is reduced.

[0031] Furthermore, the angle α between the axis of the first opening 11 and the axis of the second opening 13 is 115°, in which case the flow efficiency of the medium in the stop valve 100 has already reached its maximum. It goes without saying that in other embodiments, the angle α between the axis of the first opening 11 and the axis of the second opening 13 may be adjusted to 116°, 117°, 118°, 119°, 120°, etc. according to the actual working environment.

[0032] In other embodiments, the included angle α may be 114°, 113°, 112°, 111°, or 110° depending on the working environment, and it can be understood that the setting of the included angle α is not limited to 115° described in this embodiment, but may be any angle that can ensure that the flow efficiency of the medium meets the working requirements.

[0033] The valve body 10 further includes a valve seat 15, which is disposed at the first opening 11 and has a valve port 151 formed therein, and the valve core 20 can abut against the valve port 151 to open or close the valve port 151 to achieve blocking of the first opening 11 and the second opening 13. The valve seat 15 and the valve body 10 may be integrally molded to reduce processing steps, or may be separately formed to provide exchange space and increase functionality. When the valve seat 15 and the valve core 20 are provided separately and then engaged, the shape of the side of the valve seat 15 facing the valve core 20 can be adjusted separately to engage with the valve core 20 to close the valve port 151, thereby making the connection between the two tighter and further improving the sealing performance. This not only eliminates the need to replace the valve body 10 or the entire valve pipe, but also prevents the valve core 20 and the first opening 11 from directly colliding with each other to form a hard seal, which would cause wear on both of them, shorten the service life of the stop valve 100, and increase costs.

[0034] Specifically, the valve seat 15 includes a first segment 153 and a second segment 154, and the inner diameter of the first segment 153 is smaller than the inner diameter of the second segment 154, so that a first step 152 is formed. The first communication pipe 12 communicates the first opening 11 with the outside. The first communication pipe 12 enters the valve seat 15 and abuts against the first step 152. The first step 152 can strengthen the role of the restriction of the valve seat 15 to the first communication pipe 12 and improve the stability of the connection. The first step 152 abuts against one end of the first communication pipe 12 close to the valve seat 15 to provide a support force, and can prevent the first communication pipe 12 from entering too far into the valve seat 15 and affecting the realization of the function of the stop valve 100.

[0035] It can be understood that in other embodiments, the inner diameter of the valve seat 15 is always set to be constant, that is, no step is provided, and the valve seat 15 may serve to restrict the first communicating pipe 12 only by the supporting force of the abutment in the circumferential direction. The connection method between the valve seat 15 and the first communicating pipe 12 is not limited to the abutment against the first communicating pipe 12 by the first step 152 described in this embodiment, and may be any method that satisfies a stable connection to the first communicating pipe 12.

[0036] The inner wall of the second opening 13 includes a third segment 132 and a fourth segment 133, the inner diameter of the third segment 132 is larger than the inner diameter of the fourth segment 133, and a second step 131 is provided between the third segment 132 and the fourth segment 133, and the second communication pipe 14 enters the second opening 13 and is connected to the second opening 13 to communicate with the outside. One end of the second communication pipe 14 close to the stop valve 100 abuts against the second step 131, and the second step 131 can strengthen the role of restricting the second opening 13 against the second communication pipe 14, and the second step 131 abuts against one end of the second communication pipe 14 close to the valve core 20 to provide a supporting force and prevent the second communication pipe 14 from entering the second opening 13 too far.

[0037] Furthermore, since the first communicating pipe 12 and the second communicating pipe 14 have the same inner diameter, they are better aligned with the first opening 11 and the second opening 13, and throttling caused by the inner diameter of the first communicating pipe 12 or the second communicating pipe 14 being too small is prevented.

[0038] The valve body 10 is further provided with a limiting portion 16 at one end remote from the first opening 11 of the valve core end 17. The limiting portion 16 abuts against the valve core 20. The limiting portion 16 serves as a limiting function to prevent the valve core 20 from falling out, and also serves as a hard seal to improve the sealing performance.

[0039] The valve body 10 is further provided with a valve core end 17 for accommodating the valve core 20, and the included angle β between the central axis of the valve core end 17 and the central axis of the second opening 13 is an acute angle. When the stop valve 100 is in the first state, that is, when the valve core 20 has moved to the farthest possible position from the valve seat 15, the maximum distance along the axial direction of the valve body 10 between the plane on which the end face of the valve core 20 facing the first opening 11 is located and the inner wall of the second opening 13 is X, and the smaller of the inner diameters of the second opening 13 and the second communicating tube 14 is Y, the maximum distance X and the inner diameter Y satisfy the relational expression X≧0.8×Y / sinβ.

[0040] In this way, the flow efficiency when the medium flows between the first opening 11 and the second opening 13 can be ensured, and the proportional relationship between the maximum distance X and the inner diameter Y can be reasonably defined. In this case, it is possible to ensure that the flow efficiency is maximized, and therefore the length of the valve body of the stop valve can be optimized to ensure that there is no throttling and to minimize the length of the valve body.

[0041] Furthermore, the included angle β is 60° to 70°. In this case, when the medium flows from the first opening 11 to the second opening 13, the direction changes at an acute angle, so that the flow resistance can be reduced. If the included angle is less than 60° or more than 70°, it will affect the flow efficiency of the medium and even cause the problem of insufficient flow amount, so that the flow efficiency can be maximized.

[0042] Furthermore, the included angle β is 65°, and / or the maximum distance X and the inner diameter Y satisfy the relationship of X=0.8×Y / sinβ, in which case the flow efficiency of the medium in the stop valve is maximized, and the flow rate is also maximized, thereby reducing consumables, costs and space.

[0043] The valve core 20 moves axially along the valve body 10, and when the stop valve 100 is in the first state, i.e., when the valve core 20 moves to the farthest movable position from the valve seat 15, the maximum distance along the axial direction of the valve body 10 between the plane on which the end face of the valve core 20 facing the valve seat 15 is located and the inner wall of the second opening 13 is X, and the smaller inner diameter of the second opening 13 and the second communicating tube 14 is Y, then X≧0.8×Y / sin(180-α). In this way, the distance between the valve core 20 and the valve seat 15 is reasonably defined, and X≧0.8×Y / sin(180-α) ensures that the flow efficiency and flow rate of the medium in the stop valve 100 in such a case are maximized.

[0044] Furthermore, the maximum distance X between the plane on which the end face of the valve core 20 facing the valve seat 15 is located and the inner wall of the second opening 13 is 0.8×Y / sin(180−α). In this case, the flow efficiency of the medium in the stop valve 100 is already maximized, and the flow rate is also already maximized, reducing consumables, costs and space occupied.

[0045] In other embodiments, X may be greater than 0.8×Y / sin(180−α) depending on the needs of the working environment, and it goes without saying that X is not limited to X=0.8×Y / sin(180−α) as described in this embodiment.

[0046] The valve core 20 is surrounded by a groove 21 on its outer wall, and the groove opening of the groove 21 faces in the axial direction away from the valve core 20. A sealing member 22 is fitted into the groove 21, and the sealing member 22 surrounds the outer periphery of the valve core 20 and abuts against the inner wall of the valve body 10 to enhance the airtightness between the valve core 20 and the valve body 10, thereby preventing the medium from leaking between the valve core 20 and the valve body 10, and improving the sealing performance of the stop valve 100.

[0047] Specifically, the groove 21 is an annular groove, the sealing member 22 is a sealing ring, which is fitted into the annular groove and the outer circumferential side of the sealing ring abuts against the inner wall of the valve body 10 to improve the sealing performance between the valve core 20 and the valve body 10.

[0048] At one end of the valve core 20 close to the valve seat 15, a guide segment 23 is provided for guiding the valve core 20 into the valve seat 15 to seal the valve port 151 and realize the shutoff of the medium.

[0049] In this embodiment, the outer diameter of one end of the valve core 20 close to the valve seat 15 gradually decreases along the direction approaching the valve seat 15, forming a truncated cone shape, which is the guide segment 23. During the process of the valve core 20 entering the valve orifice 151, the small outer diameter of one end of the valve core 20 close to the valve orifice 151 makes it easier to enter the valve orifice 151. After the valve core 20 enters the valve orifice 151, the outer surface of the guide segment 23 and the inner wall of the valve orifice 151 form a tapered surface seal to realize blocking of the stop valve 100.

[0050] The stop valve 100 further includes a valve assembly 30 as a refill inlet or a discharge outlet for refilling or discharging the medium to the entire cooling system. In this embodiment, the valve assembly 30 is connected to the valve body 10 and is located on the side of the valve body 10 away from the second opening 13.

[0051] In other embodiments, the valve assembly 30 may be located at other locations on the stop valve 100 and may be connected to the stop valve 100 to replenish or release media to the entire cooling system.

[0052] Optionally, the axis of the valve assembly 30 and the axis of the valve body 10 are perpendicular to each other, which improves the efficiency of media flow as the valve assembly 30 fills or bleeds media to the overall cooling system.

[0053] The valve assembly 30 includes a connecting body 34 and an end cover 31. The connecting body 34 is for accommodating the valve core 32 and forming a passage 33 for the medium to flow, and the end cover 31 is fitted onto one end of the connecting body 34 and is used to seal the connecting body 34.

[0054] In this embodiment, the connecting body 34 and the valve body 10 are integrally molded, so that the steps for assembling the connecting body 34 and the valve body 10 are reduced, and there is no need to provide a separate structure to ensure the sealing performance between the connecting body 34 and the valve body 10. A male thread is provided on the outer periphery of one end of the connecting body 34 away from the valve body 10, and a female thread is provided on the inner wall of the end cover 31, and the end cover 31 is screwed onto the connecting body 34.

[0055] Inside the connecting body 34, there is a passage 33 through which the medium flows into or out of the stop valve 100. A valve core 32 is provided inside the passage 33, and an elastic member (not shown) is provided at one end of the valve core 32. When the valve core 32 is not subjected to external pressure, it maintains a closed state. In this case, the passage 33 is blocked by the valve core 32 to block the inside of the valve body 10 from the outside. When the valve core 32 is subjected to pressure, the valve core 32 presses the elastic member and moves in a direction toward the valve body 10, thereby releasing the seal and connecting the inside of the valve body 10 to the passage 33, allowing the medium to flow into or out of the inside of the valve body 10. The elastic member is used to return the valve core 32 to its original position.

[0056] Referring to FIG. 6, the present application further provides a cooling system 200 including the above-mentioned stop valve 100, wherein the stop valve 100 is attached to a medium passage 210 of the cooling system, thereby controlling the blocking and flow of the medium passage 210 and being used to replenish the medium to the cooling system 200.

[0057] In the working process of the stop valve 100 of this embodiment, the medium flows into the stop valve 100 from the first communicating tube 12 and then flows out of the stop valve 100 from the second communicating tube 14, or flows into the stop valve 100 from the second communicating tube 14 and then flows out of the stop valve 100 from the first communicating tube 12. When the valve core 20 moves toward the first opening 11 and finally abuts against the valve port 151, the stop valve 100 realizes blocking of the medium, and conversely, when the valve core 20 moves in the direction away from the first opening 11, the stop valve 100 realizes opening.

[0058] Compared with the related art, the stop valve 100 provided by the present application can ensure the flow efficiency when the medium flows between the first opening 11 and the second opening 13, and can reasonably define the ratio relationship between the maximum distance X and the inner diameter Y, thereby ensuring the maximization of the flow efficiency.

[0059] Each of the technical features of the above-mentioned embodiments may be combined in any combination. For the sake of brevity, not all possible combinations of each of the technical features in the above-mentioned embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, all of them should be considered within the scope described in this specification.

[0060] The above examples merely show some embodiments of the present application, and although the description is relatively specific and detailed, it should not be understood as limiting the scope of the utility model claims. It should be noted that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the scope of the attached claims.

Claims

1. 1. A stop valve including a valve body and a valve core, the valve core being located within the valve body, movable along an axial direction of the valve body, and used for opening and closing the stop valve, the valve body being provided with a valve core end, a first opening, and a second opening, the first opening being used for connecting to a first communicating pipe, and the second opening being used for connecting to a second communicating pipe, an included angle between a central axis of the valve core end and a central axis of the second opening being β, the included angle β being an acute angle, the valve core having a first state for opening the stop valve, and when the valve core is in the first state, a maximum distance along the axial direction of the valve body between a plane on which an end face of the valve core facing the first opening is located and an inner wall of the second opening is X, and a smaller inner diameter of an inner diameter of the second opening and an inner diameter of the second communicating pipe is Y, the maximum distance X and the inner diameter Y satisfy a relational expression of X≧0.8×Y / sinβ.

2. The stop valve according to claim 1 , wherein the included angle β is greater than or equal to 60° and less than or equal to 70°.

3. 3. The stop valve according to claim 2, wherein the included angle β is 65°, and / or the maximum distance X and the inside diameter Y satisfy a relationship of X=0.8×Y / sin β.

4. The first opening and the second opening have the same inner diameter, And / or, the first communicating pipe and the second communicating pipe have the same inner diameter.

5. 2. The stop valve according to claim 1, wherein the valve body includes a valve seat, the valve seat is provided at the first opening, a valve port is provided on the valve seat, the valve core is capable of opening and closing the valve port, the valve seat includes a first segment and a second segment, an inner diameter of the first segment is smaller than an inner diameter of the second segment, thereby forming a first step, and the first communicating tube enters the valve seat and abuts against the first step.

6. 2. The stop valve according to claim 1, wherein, when the first opening and the valve body are coaxially provided, an included angle between an axis of the second opening and an axis of the first opening is α, the included angle α is 110° or more and 120° or less, and when the stop valve is in the first state, the maximum distance X and the inner diameter Y satisfy a relational expression of X≧0.8×Y / sin(180−α).

7. The stop valve according to claim 6, wherein the included angle α is 115°, and / or the maximum distance X and the inner diameter Y satisfy a relationship of X = 0.8 × Y / sin (180 - α).

8. 2. The stop valve according to claim 1, wherein an inner wall of the second opening includes a third segment and a fourth segment, an inner diameter of the third segment is larger than an inner diameter of the fourth segment, a second step is provided between the third segment and the fourth segment, one end of the second communicating pipe abuts against the second step, and an inner diameter of the second opening is the inner diameter of the fourth segment.

9. 2. The stop valve according to claim 1, wherein a sealing member is provided between the valve core and the valve body, the sealing member surrounds an outer circumferential side of the valve core and abuts against an inner wall of the valve body, and the valve body is provided with a limiting portion, and when a distance between the valve core and the first opening is at a maximum, the limiting portion abuts against the valve core.

10. 10. A cooling system including a stop valve according to claim 1, wherein the stop valve is attached to a medium passage of the cooling system to control blocking and flow of the medium passage and to replenish medium to the cooling system.

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