Anti-freeze valve

Abstract

A freeze prevention valve including a valve seat (10) having a valve chamber (11) and a valve port (12), a valve core (20) movably provided within the valve chamber (11) for opening and closing the valve port (12), and a thermostat (30) having a thermostat push rod (31) that enters the valve core (20) and pushes the valve core (20) toward the valve port (12), wherein at least a part of a temperature-sensing part (32) of the thermostat (30) protrudes outside the valve seat (10) and enters a detection medium.

Description

[Technical Field]

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on February 10, 2023, bearing application number 202310115668.X and entitled "Anti-freeze valve."

[0002] FIELD OF THE INVENTION This application relates to the technical field of anti-freeze valves, and more particularly to anti-freeze valves. [Background technology]

[0003] Currently, a thermostat is installed within the valve seat of an anti-freeze valve, which senses the water temperature and controls the opening and closing state of the valve.Furthermore, when the water temperature drops to a predetermined temperature, the valve opens in a timely manner to allow the water in the pipeline to be discharged, thereby preventing the water in the pipeline from freezing and causing it to burst.

[0004] However, there is a certain difference between the temperature sensed by the thermostat installed in the valve seat and the actual water temperature in the pipeline, which makes the opening time of the anti-freeze valve inaccurate, affecting the reliability of the anti-freeze valve. Summary of the Invention

[0005] The main objective of the present application is to provide an anti-freeze valve to solve the problem of low opening accuracy of anti-freeze valves in the prior art.

[0006] To achieve the above object, the present application provides an anti-freeze valve including: a valve seat having a valve chamber and a valve port; a valve core movably disposed within the valve chamber for opening and closing the valve port; and a thermostat having a thermostat push rod that enters the valve core and pushes the valve core toward the valve port, wherein at least a portion of the temperature-sensing part of the thermostat protrudes outside the valve seat and enters a detection medium.

[0007]

[0009] When the technical aspects of the present application are applied, the thermostat's temperature sensing part is located outside the valve seat and can penetrate directly into the flowable medium to sense the temperature of the flowable medium, further improving the temperature sensing accuracy of the temperature sensing part. In this way, the temperature sensing part located outside the valve seat, on the one hand, lowers the height of the valve seat so that the temperature of the valve port is closer to the temperature of the flowable medium, making the valve port less likely to freeze and improving the reliability of the anti-freeze valve. On the other hand, the temperature sensing part can more accurately obtain the temperature of the flowable medium, accurately controlling the opening and closing timing of the anti-freeze valve, solving the problem of low opening accuracy of anti-freeze valves in the prior art and improving the opening accuracy of the anti-freeze valve.

[0008] Compared with prior art anti-freeze valves in which the thermostat is located within the valve seat, the temperature-sensing part of the thermostat of the anti-freeze valve in the present application is located outside the valve seat, which lowers the height of the valve seat and shortens the distance between the valve port and the flowing medium, making the temperature at the valve port closer to the temperature of the flowing medium and less likely to freeze, and also enables the temperature-sensing part to accurately obtain the actual temperature of the flowing medium, improving the opening accuracy of the anti-freeze valve.

[0009] Preferably, the freeze prevention valve further includes an elastic structure provided between the valve core and the valve seat for applying an elastic force to the valve core to move it in a direction away from the valve port.

[0010] Preferably, the valve orifice includes a tapered hole segment and a straight hole segment that are connected to each other, and the hole diameter of the tapered hole segment gradually decreases along the direction from the tapered hole segment to the straight hole segment.

[0011] Preferably, the valve core includes an insert segment located at an end of the valve core, the valve orifice being closed when at least a portion of the insert segment is inserted into the orifice segment.

[0012] Preferably, the anti-freeze valve further includes a first sealing structure provided between the valve core and the straight hole segment when the valve port is in a closed state.

[0013] Preferably, the valve seat has a mounting hole and a communicating hole, the mounting hole and the communicating hole are spaced apart, and includes a sleeve in which at least a part of the thermostat body of the thermostat is inserted into the mounting hole, and a seat body connected to and surrounding the sleeve to form a valve chamber, the seat body having a valve port and communicating the valve chamber with the communicating hole, wherein the cross-section of the communicating hole is larger than the cross-section of the valve port.

[0014] Preferably, the thermostat is secured to the mounting hole.

[0015] Preferably, one communication hole is provided, or multiple communication holes are provided, and the multiple communication holes are provided at intervals surrounding the mounting hole, and the sum of the passage cross sections of all the communication holes is larger than the passage cross section of the valve port.

[0016] Preferably, the valve core has a first hole segment and a second hole segment that are connected to each other, the inner diameter of the first hole segment is larger than the inner diameter of the second hole segment, and a step surface is formed at the connection point between the first hole segment and the second hole segment, and the step surface is used to limit and stop the thermostat body of the thermostat, and the end surface of the thermostat push rod away from the thermostat body abuts against the bottom surface of the second hole segment and is used to push the valve core to close the valve port.

[0017] Preferably, at least a portion of the thermostat body enters the first hole segment and slides along the extension direction of the first hole segment.

[0018] Preferably, the outer diameter of the thermostat body matches the inner diameter of the first bore segment, and the end of the thermostat push rod remote from the thermostat body is an enlarged segment, the outer diameter of which matches the inner diameter of the second bore segment. [Brief explanation of the drawings]

[0019] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and their descriptions in the application are intended to help interpret the application and are not intended to unduly limit the application.

[0020] [Figure 1] 1 illustrates a cross-sectional view of an embodiment of an anti-freeze valve according to the present application in a closed state. [Figure 2] 2 shows a cross-sectional view of the anti-freeze valve of FIG. 1 in an open state. [Figure 3] 2 shows a cross-sectional view of a sleeve of the anti-freeze valve of FIG. 1. [Figure 4] 4 shows a top view of the sleeve of FIG. 3. [Figure 5] FIG. 2 is a front view of the seat body of the freeze prevention valve of FIG. 1. [Figure 6] A cross-sectional schematic diagram of the seat body of Figure 5 is shown. [Figure 7] 2 shows a cross-sectional view of the valve core of the freeze prevention valve of FIG. 1. [Figure 8] 8 shows a top view of the valve core of FIG. 7.

[0021] Here, the above drawings include the following reference numerals: 10 valve seat, 11 valve chamber, 12 valve port, 121 tapered hole segment, 122 straight hole segment, 13 sleeve, 131 mounting hole, 132 communicating hole, 14 seat body, 20 valve core, 21 first hole segment, 22 second hole segment, 30 thermostat, 31 thermostat push rod, 311 expansion segment, 32 temperature sensing part, 33 thermostat body, 40 elastic structure, 50 first sealing structure, 60 second sealing structure. DETAILED DESCRIPTION OF THE INVENTION

[0022] It should be noted that, unless contradictory, the embodiments and features in the embodiments in the present application can be combined with each other. The present application will be described in detail below in conjunction with the embodiments with reference to the drawings.

[0023] Unless otherwise explained, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this application, unless otherwise specified, directional terms such as "upper, lower" used generally refer to the direction shown in the drawings or to the vertical, perpendicular, or gravitational direction. Similarly, for ease of understanding and explanation, "left, right" generally refer to the left, right, and "inner, outer" generally refer to the inner, outer sides of the contours of each component itself, but the above directional terms are not intended to limit this application.

[0025] The present application provides an anti-freeze valve to solve the problem of low opening accuracy of anti-freeze valves in the prior art.

[0026] As shown in Figures 1 to 8, the anti-freeze valve includes a valve seat 10, a valve core 20, a thermostat 30, and an elastic structure 40. The valve seat 10 has a valve chamber 11 and a valve port 12. The valve core 20 is movably disposed within the valve chamber 11 to open and close the valve port 12. The thermostat push rod 31 of the thermostat 30 enters the valve core 20 and pushes it toward the valve port 12. At least a portion of the thermostat's temperature-sensing part 32 protrudes outside the valve seat 10 and enters the detection medium.

[0027] When the technical aspect of this embodiment is applied, the temperature sensing part 32 of the thermostat 30 is located outside the valve seat 10 and can directly penetrate into the flowable medium to sense the temperature of the flowable medium, further improving the temperature sensing accuracy of the temperature sensing part 32. In this way, the temperature sensing part 32 located outside the valve seat 10, on the one hand, lowers the height of the valve seat 10 so that the temperature of the valve port 12 is closer to the temperature of the flowable medium, making the valve port 12 less likely to freeze and improving the reliability of the anti-freeze valve; on the other hand, it allows the temperature sensing part 32 to more accurately obtain the temperature of the flowable medium, accurately controlling the opening and closing timing of the anti-freeze valve, solving the problem of low opening accuracy of anti-freeze valves in the prior art and improving the opening accuracy of the anti-freeze valve.

[0028] Compared with prior art anti-freeze valves in which the thermostat is located within the valve seat, the temperature-sensing part 32 of the thermostat 30 of the anti-freeze valve in this embodiment is located outside the valve seat 10, which lowers the height of the valve seat 10 and shortens the distance between the valve orifice 12 and the flow medium, making the temperature at the valve orifice 12 closer to the temperature of the flow medium and less likely to freeze. This also enables the temperature-sensing part 32 to accurately obtain the actual temperature of the flow medium, improving the opening accuracy of the anti-freeze valve.

[0029] As shown in Figure 1, the freeze prevention valve further includes an elastic structure 40. Here, the elastic structure 40 is provided between the valve core 20 and the valve seat 10, and is used to apply an elastic force to the valve core 20 to move it away from the valve port 12. In this way, by providing the elastic structure 40 as described above, the valve core 20 can automatically open the valve port 12, making operation easier for the operator.

[0030] In this embodiment, the elastic structure 40 is a spring. Thus, when the thermostat push rod 31 pushes the valve core 20 toward the valve port 12 to close the valve port 12, the anti-freeze valve is closed and the elastic structure 40 is compressed. When the thermostat push rod 31 retracts, the valve core 20 moves away from the valve port 12 due to the elastic force of the elastic structure 40, opening the valve port 12 and opening the anti-freeze valve.

[0031] Specifically, when the temperature of the fluid medium acquired by the temperature sensing part 32 is less than or equal to a predetermined temperature value T1 (0°C ≤ T1 ≤ 3°C), the thermostat push rod 31 retreats, and the valve core 20 moves away from the valve port 12 under the action of the elastic force of the elastic structure 40, and the freeze prevention valve is opened. When the temperature of the fluid medium acquired by the temperature sensing part 32 is greater than or equal to a predetermined temperature value T2 (3°C < T2 ≤ 5°C), the thermostat push rod 31 protrudes, pushes the valve core 20 and moves it toward the valve port 12 to seal the valve port 12. At this time, the freeze prevention valve is closed.

[0032] Specifically, when the freeze prevention valve is in use, the temperature of the valve port 12 approaches the outdoor temperature because the valve port 12 is close to the outside. However, since the temperature of the fluid medium in the pipeline is higher than the outdoor temperature, reducing the height of the valve seat 10 can shorten the distance between the valve port 12 and the fluid medium, making the temperature of the valve port 12 closer to the temperature of the fluid medium, thereby improving the freeze prevention effect of the freeze prevention valve.

[0033] As shown in FIGS. 1, 2 and 6, the valve port 12 includes a tapered hole segment 121 and a straight hole segment 122 that communicate with each other. Along the direction from the tapered hole segment 121 to the straight hole segment 122, the aperture diameter of the tapered hole segment 121 gradually decreases. In this way, with the above configuration, on the one hand, the diameter of one end of the valve port 12 close to the valve core 20 is made larger than the diameter of the valve core 20, and the tapered hole segment 121 can guide the valve core 20 so that the valve core 20 can enter the valve port 12, reducing the difficulty of opening and closing the freeze prevention valve. On the other hand, when the freeze prevention valve is in the open state, the tapered hole segment 121 can increase the flow velocity of the fluid medium and increase the drainage speed of the freeze prevention valve.

[0034] In this embodiment, the aperture diameter of the straight hole segment 122 is mutually consistent with the diameter of the valve core 20. Thereby, when the freeze prevention valve is in the closed state, the engagement tightness between the two is improved, preventing the fluid medium from flowing out through the engagement gap between the two, and improving the reliability of the sealing of the valve core 20.

[0035] In this embodiment, the valve core 20 includes an insert segment located at the end of the valve core 20, and the valve port 12 is closed when at least a portion of the insert segment is inserted into the straight-hole segment 122. Specifically, the insert segment has a cylindrical structure that fits into the straight-hole segment 122 to close the valve port 12. Because the valve core 20 has no lower limit when the anti-freeze valve is closed, the vibrations of the stroke of the thermostat push rod 31 do not affect the sealing reliability of the valve core 20. This allows thermostats 30 of various specifications to be installed on the anti-freeze valve, reducing the difficulty of processing the anti-freeze valve.

[0036] 1 and 2, the anti-freeze valve further includes a first sealing structure 50 disposed between the valve core 20 and the straight hole segment 122 when the valve port 12 is in a closed state. In this manner, the first sealing structure 50 improves the sealing reliability of the valve port 12, preventing the flow medium from flowing out through the valve port 12 and causing medium leakage, and further improving the sealing reliability of the valve core 20.

[0037] In this embodiment, the first sealing structure 50 is an O-shaped sealing ring, and the valve core 20 is provided with an accommodation groove, and the O-shaped sealing ring is fitted into the accommodation groove of the valve core 20. In this way, with the above configuration, the first sealing structure 50 is in close contact with the inner circumferential surface of the valve orifice 12, and the sealing effect of the valve core 20 on the valve orifice 12 can be improved.

[0038] As shown in FIGS. 1 to 6 , the valve seat 10 includes a sleeve 13 and a seat body 14. The sleeve 13 has a mounting hole 131 and a communication hole 132. The mounting hole 131 and the communication hole 132 are spaced apart, and at least a part of the thermostat body 33 is inserted into the mounting hole 131. The seat body 14 and the sleeve 13 are connected and surrounded to form a valve chamber 11. The valve port 12 is provided in the seat body 14, and the valve chamber 11 is in communication with the communication hole 132. The cross-sectional area of ​​the communication hole 132 is larger than the cross-sectional area of ​​the valve port 12. With this configuration, on the one hand, the thermostat 30 is attached to the valve seat 10 by the mounting hole 131, realizing the temperature-sensing opening function of the anti-freeze valve. On the other hand, the communication hole 132 and the valve port 12 in the seat body 14 form a medium flow passage, realizing the drainage function of the anti-freeze valve. At the same time, the cross section of the communication hole 132 is larger than that of the valve orifice 12, so that the flow rate of the communication hole 132 of the freeze prevention valve is larger than that of the valve orifice 12, and is suitable for a larger diameter valve orifice.

[0039] In this embodiment, the second sealing structure 60 is fitted to the sleeve 13. In this way, after the sleeve 13 and the seat body 14 are assembled, the second sealing structure 60 fitted to the sleeve 13 comes into tight contact with the inner circumferential surface of the seat body 14, improving the tight engagement between the sleeve 13 and the seat body 14 and preventing the flow medium in the valve seat 10 from leaking through the engagement gap between them, thereby improving the sealing reliability of the anti-freeze valve.

[0040] Specifically, by providing a sufficient gap between the inner surfaces of the valve core 20 and the seat body 14, the flow capacity of the flow medium within the valve seat 10 is improved, the anti-freeze valve can be adapted to a large-diameter valve port 12, and the versatility of the anti-freeze valve can be improved.

[0041] In this embodiment, the thermostat 30 is fixed to the mounting hole 131. In this manner, the above configuration prevents the thermostat body 33 from shaking or moving within the valve seat 10, which would otherwise affect the structural stability of the anti-freeze valve.

[0042] Alternatively, the mounting hole 131 may be engaged with, glued to, screwed to, or connected to the thermostat 30 via a fastener. In this way, the thermostat 30 fixedly mounted within the mounting hole 131 can limit the moving direction of the thermostat push rod 31, eliminating the need for the operator to consider issues related to guiding the thermostat 30 and reducing the operator's design difficulty. At the same time, the above configuration makes the mounting method of the thermostat 30 more flexible and diversified, adapting to different working conditions and usage requirements, and improving the operator's processing flexibility.

[0043] In this embodiment, the mounting hole 131 is threadedly engaged with the thermostat 30. In this manner, with the above configuration, the thermostat 30 is removably mounted in the mounting hole 131, which makes it convenient for workers to repair and inspect the anti-freeze valve later.

[0044] Specifically, a female thread is provided on the inner surface of the mounting hole 131, and a male thread is provided on the outer surface of the thermostat 30, so that the worker can complete the installation and removal of the thermostat 30 simply by twisting the thermostat 30 clockwise or counterclockwise, reducing the difficulty of operation for the worker.

[0045] Alternatively, one or more communication holes 132 may be provided, and the multiple communication holes 132 are spaced apart around the mounting hole 131, with the sum of the cross-sectional areas of all the communication holes 132 being greater than the cross-sectional area of ​​the valve orifice 12. This configuration allows the flow rate of the communication hole 132 to be greater than the flow rate of the valve orifice 12, allowing for larger diameter valve orifices 12 and improving the versatility of the anti-freeze valve. At the same time, this configuration allows for more flexible and diverse selection of the number of communication holes 132, adapting to different working conditions and usage requirements, and improving the flexibility of the operator's processing. Providing multiple communication holes 132 is advantageous in reducing the area of ​​each communication hole 132. Furthermore, since the multiple communication holes 132 are distributed around the mounting hole 131, the mounting holes 131 can be spaced apart more easily. Therefore, when determining the size of the mounting hole 131, providing a plurality of communication holes 132 is advantageous in reducing the volume of the valve seat 10.

[0046] In this embodiment, there are eight communication holes 132, and the eight communication holes 132 are spaced apart and surround the mounting hole 131. In this way, the above configuration, on the one hand, ensures that the sum of the passage cross sections of all the communication holes 132 is greater than the passage cross section of the valve port 12, improving the versatility of the anti-freeze valve, and on the other hand, makes the distribution of the flowable medium within the valve seat 10 more uniform, prevents the flowable medium flowing through each communication hole 132 from interfering with each other, and increases the flow rate of the flowable medium within the anti-freeze valve.

[0047] It should be noted that the number of the communication holes 132 is not limited thereto and can be adjusted according to the working conditions and usage requirements. Optionally, the number of the communication holes 132 is one, two, three, four, five, six, or more.

[0048] 1, 2, 7 and 8, the valve core 20 has a first hole segment 21 and a second hole segment 22 that are connected to each other. The inner diameter of the first hole segment 21 is larger than that of the second hole segment 22. A step surface is formed at the connection point between the first hole segment 21 and the second hole segment 22, and this step surface is used to limit and stop the thermostat body 33 of the thermostat 30. The end face of the thermostat push rod 31 that is farther from the thermostat body 33 abuts against the bottom surface of the second hole segment 22 to push the valve core 20 and close the valve port 12. In this way, with the above configuration, on the one hand, the step surface limits the thermostat body 33, restricting the movement range of the valve core 20 and ensuring a more appropriate degree of opening of the valve port 12, and on the other hand, the thermostat push rod 31 pushes the bottom surface of the second hole segment 22 to move the valve core 20, thereby realizing the sealing function of the valve core 20. At the same time, the above configuration makes the structure of the valve core 20 simpler, easier to process and realize, and reduces the difficulty for workers in processing.

[0049] In this embodiment, the inner diameter of the first hole segment 21 is the same as the outer diameter of the thermostat body 33, and the inner diameter of the second hole segment 22 is the same as the outer diameter of the thermostat push rod 31. In this way, with the above configuration, the first hole segment 21 can guide the thermostat body 33, and the second hole segment 22 can guide the thermostat push rod 31, ensuring that the thermostat 30 moves along a predetermined direction and improving the operating reliability of the anti-freeze valve.

[0050] 1 and 2, at least a portion of the thermostat body 33 enters the first hole segment 21 and slides along the extension direction of the first hole segment 21. In this way, the first hole segment 21 restricts the sliding direction of the thermostat body 33, thereby restricting the moving direction of the thermostat push rod 31. The engagement between the thermostat push rod 31 and the valve core 20 realizes the internal positioning of the valve core 20, ensuring that the valve core 20 can seal or open the valve port 12, and improving the operating reliability of the anti-freeze valve.

[0051] Optionally, the anti-freeze valve includes an engagement assembly including a first engagement portion provided on the thermostat body 33 and a second engagement portion provided on the hole wall of the second hole segment 22. One of the first engagement portion and the second engagement portion is a protrusion, and the other of the first engagement portion and the second engagement portion is a recess. The protrusion fits into the recess and can slide along the extension direction of the recess. The extension direction of the recess coincides with the extension direction of the second hole segment 22. Thus, with this configuration, the first engagement portion and the second engagement portion restrict the movement direction of the thermostat body 33, further improving the internal positioning accuracy of the valve core 20, ensuring that the valve core 20 can seal or open the valve port 12, and improving the operational reliability of the anti-freeze valve. At the same time, this configuration simplifies the method for improving the internal positioning accuracy of the valve core 20 and reduces the difficulty for workers in processing.

[0052] In this embodiment, the first engagement portion is a protrusion, and the second engagement portion is a recess, and the first engagement portion enters into the second engagement portion and slides along the extension direction of the second engagement portion. In this way, the engagement between the protrusion and the recess can, on the one hand, limit the movement range of the valve core 20 to realize the internal positioning of the valve core 20, and, on the other hand, allow the valve core 20 to slide along the extension direction of the recess to realize the sealing function of the valve core 20.

[0053] In other embodiments not shown in the drawings, the first engagement portion is a recess and the second engagement portion is a protrusion, and the second engagement portion fits into the first engagement portion and slides along the extension direction of the first engagement portion.

[0054] In this embodiment, the anti-freeze valve further includes an anti-friction layer disposed between the hole wall of the second hole segment 22 and the thermostat body 33. In this manner, the above configuration prevents damage to the thermostat body 33 and the second hole segment 22 due to repeated friction, thereby extending the service life of the thermostat 30 and the valve core 20.

[0055] 1, the outer diameter of the thermostat body 33 is the same as the inner diameter of the first hole segment 21, and the end of the thermostat push rod 31 remote from the thermostat body 33 is an expanded diameter segment 311, the outer diameter of which is the same as the inner diameter of the second hole segment 22. In this way, with the above configuration, the thermostat push rod 31 and the thermostat body 33 both achieve the function of guiding and positioning the valve core 20, that is, the thermostat 30 is positioned with the valve core 20 at two points, improving the stability of the movement of the valve core 20.

[0056] From the above description, it can be understood that the above-described embodiments of the present application achieve the following technical effects.

[0057] The thermostat's temperature sensing part is located outside the valve seat and can penetrate directly into the fluid medium to sense the temperature of the fluid medium, further improving the temperature sensing accuracy of the temperature sensing part 32. In this way, the temperature sensing part located outside the valve seat on the one hand lowers the height of the valve seat, allowing the temperature of the valve port to be closer to the temperature of the fluid medium, making the valve port less likely to freeze and improving the reliability of the anti-freeze valve, and on the other hand, it allows the temperature sensing part to more accurately obtain the temperature of the fluid medium, accurately controlling the opening and closing timing of the anti-freeze valve, solving the problem of low opening accuracy of anti-freeze valves in the prior art and improving the opening accuracy of the anti-freeze valve.

[0058] Compared with prior art anti-freeze valves in which the thermostat is located within the valve seat, the temperature-sensing part of the thermostat of the anti-freeze valve in the present application is located outside the valve seat, which lowers the height of the valve seat and shortens the distance between the valve port and the flowing medium, making the temperature at the valve port closer to the temperature of the flowing medium and less likely to freeze, and also enables the temperature-sensing part to accurately obtain the actual temperature of the flowing medium, improving the opening accuracy of the anti-freeze valve.

[0059] It is clear that the above-mentioned embodiments are only some of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments in the present application, any other embodiments that a person skilled in the art can obtain without creative efforts should fall within the scope of protection of the present application.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should also be understood that when the terms "comprise" and / or "comprises" are used herein, it means that features, steps, operations, devices, assemblies, and / or combinations thereof are present.

[0061] It should be noted that the terms "first," "second," etc. in the specification, claims, and drawings of this application are intended to distinguish between similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the terms used in this application may be interchanged, if necessary, to enable the embodiments of the application described herein to be practiced, for example, in an order other than that shown or described herein.

[0062] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. a valve seat (10) having a valve chamber (11) and a valve port (12); a valve core (20) movably provided in the valve chamber (11) for opening and closing the valve port (12); a thermostat (30) in which a thermostat push rod (31) enters the valve core (20) and pushes the valve core (20) to move it toward the valve port (12); Including, At least a part of the temperature-sensitive part (32) of the thermostat (30) protrudes outside the valve seat (10) and enters into a detection medium.

2. 2. The freeze prevention valve according to claim 1, further comprising an elastic structure (40) provided between the valve core (20) and the valve seat (10) for applying an elastic force to the valve core (20) to move it in a direction away from the valve port (12).

3. 2. The freeze prevention valve according to claim 1, wherein the valve port (12) includes a tapered hole segment (121) and a straight hole segment (122) that are connected to each other, and the hole diameter of the tapered hole segment (121) gradually decreases along a direction from the tapered hole segment (121) to the straight hole segment (122).

4. 4. The freeze protection valve of claim 3, wherein the valve core includes an insert segment located at an end of the valve core, and the valve port is closed when at least a portion of the insert segment is inserted into the straight hole segment.

5. 4. The freeze protection valve according to claim 3, further comprising a first sealing structure (50) provided between the valve core (20) and the straight hole segment (122) when the valve port (12) is in a closed state.

6. the valve seat (10) has a mounting hole (131) and a communication hole (132), the mounting hole (131) and the communication hole (132) are spaced apart, and a sleeve (13) in which at least a part of a thermostat body (33) of the thermostat (30) is inserted into the mounting hole (131); a seat body (14) connected to and surrounding the sleeve (13) to form the valve chamber (11), the valve port (12) being provided in the seat body (14) and the valve chamber (11) communicating with the communication hole (132); 2. The freeze prevention valve according to claim 1, wherein the cross section of the communication hole (132) is larger than the cross section of the valve port (12).

7. The freeze protection valve according to claim 6, wherein the thermostat (30) is fixed in the mounting hole (131).

8. 7. The freeze prevention valve according to claim 6, wherein one or more of the communication holes (132) are provided, the communication holes (132) are provided at intervals surrounding the mounting hole (131), and the sum of the passage cross sections of all the communication holes (132) is greater than the passage cross section of the valve port (12).

9. 2. The freeze prevention valve according to claim 1, wherein the valve core (20) has a first hole segment (21) and a second hole segment (22) that are connected to each other, the inner diameter of the first hole segment (21) is larger than the inner diameter of the second hole segment (22), a stepped surface is formed at the connection point between the first hole segment (21) and the second hole segment (22), the stepped surface is used to limit and stop a thermostat body (33) of the thermostat (30), and an end surface of the thermostat push rod (31) away from the thermostat body (33) is used to abut against a bottom surface of the second hole segment (22) to push the valve core (20) and close the valve port (12).

10. The freeze prevention valve according to claim 9, wherein at least a portion of the thermostat body (33) enters the first hole segment (21) and slides along the extension direction of the first hole segment (21).

11. 10. The freeze protection valve of claim 9, wherein the outer diameter of the thermostat body (33) matches the inner diameter of the first hole segment (21), and the end of the thermostat push rod (31) away from the thermostat body (33) is an enlarged diameter segment (311), and the outer diameter of the enlarged diameter segment (311) matches the inner diameter of the second hole segment (22).

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