Anti-freezing device and water heater comprising same
By designing the valve core and limit sleeve of the antifreeze device, the valve core angle can be automatically adjusted in cold environments to prevent the water heater pipes from freezing and cracking, thus solving the safety hazards of water heaters in cold environments and ensuring the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2023-08-08
- Publication Date
- 2026-06-02
Smart Images
Figure CN116989480B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water heater technology, and more specifically to an antifreeze device and a water heater containing the same. Background Technology
[0002] With the improvement of living standards and the convenience of timely hot water supply, household water heaters have become increasingly popular, and providing consumers with a comfortable and safe bathing environment is receiving more and more attention from industry professionals. However, current household water heaters have poor adaptability to environmental changes. For example, in cold winters, when outdoor temperatures are low, cold air can easily enter the water heater through the exhaust pipe, causing the water in the internal pipes to freeze. Due to the increased volume, the pipes can easily burst. When the temperature rises, the ice in the pipes melts. If the user does not notice this in time and turn off the antifreeze device, the entire unit will leak, causing water damage to the base plate, electrical leakage, and other property damage and safety issues. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the defect that water in the internal pipes of water heaters in the prior art is prone to freezing in cold environments, which leads to pipe expansion and cracking, and to provide an antifreeze device and a water heater containing the same.
[0004] The present invention solves the above-mentioned technical problems through the following technical solution:
[0005] An antifreeze device, characterized in that the antifreeze device comprises:
[0006] A cavity for the passage of water;
[0007] The valve core includes a first end located inside the cavity and a second end located outside the cavity. A snap-fit portion is provided on the side wall of the valve core. The valve core is rotatable about the extension direction from the first end to the second end. A blocking portion is provided at the first end of the valve core. The blocking portion can close or open the cavity by rotating the valve core.
[0008] A limiting sleeve is fitted around the valve core and fixed relative to the cavity. An annular limiting track is formed on the side wall of the limiting sleeve, surrounding the valve core. The snap-fit part is movably disposed within the annular limiting track. The annular limiting track includes a first guide surface and a second guide surface arranged opposite to each other in sequence along the direction from the first end to the second end of the valve core. The first guide surface has a first groove and a second groove at different positions in the circumferential direction of the annular limiting track, and a protrusion is formed between the first groove and the second groove.
[0009] When the snap-fit part snaps into the first groove, the valve core is located at the first angle, and the blocking part opens the cavity;
[0010] When the valve core moves toward its second end, the locking part leaps over the protrusion under the abutment guidance of the second guide surface, so that when the valve core moves further toward its first end, the locking part can move to the second groove under the abutment guidance of the first guide surface and rotate the valve core to the second angle. After the blocking part rotates, it closes the cavity.
[0011] In this design, the locking part is positioned within the annular limiting track. When the valve core moves laterally, the locking part and the annular limiting track interact to generate a rotational motion relative to the limiting sleeve. Under normal use, the locking part engages with the first groove on the first guide surface, limiting the valve core and preventing it from blocking water flow. When the outdoor temperature is low, cold air enters the water heater through the exhaust pipe, causing the water inside the cavity to freeze continuously. The frozen water applies external force to the first end of the valve core, causing it to move towards its second end. During this movement, the locking part abuts against the second guide surface and moves under its guidance, overcoming the protrusion. When the outdoor temperature rises or the ice melts due to other reasons, the valve core moves towards its first end. The locking part abuts against the first guide surface and moves under its guidance to the second groove adjacent to the first groove, causing the valve core to rotate and the blocking part to rotate to the second angle to close the cavity. If the pipes inside the water heater have already frozen and cracked, the antifreeze device can prevent water from flowing into the water heater, thereby avoiding water leakage from the entire unit, which could cause property damage and safety issues such as water damage to the base plate and electrical leakage.
[0012] Preferably, the included angle between adjacent first and second grooves in the circumferential direction of the limiting sleeve is α degrees.
[0013] In this design, the valve core's turning angle is fixed at α degrees when it moves from the first groove to the second groove, facilitating switching between the first and second angles.
[0014] Preferably, there are two blocking parts, and the two blocking parts are arranged at 180 degrees relative to the rotation axis of the valve core at the first end of the valve core;
[0015] The included angle between the first groove and the second groove in the circumferential direction of the limiting sleeve is 90 degrees.
[0016] In this design, the two barriers can be sealed simultaneously from the inlet and outlet, respectively, resulting in a better sealing effect.
[0017] Preferably, the cavity includes an inlet and an outlet;
[0018] When the blocking part is at the first angle, the inlet and the outlet are connected;
[0019] When the barrier is at the second angle, the barrier blocks the inlet and / or the outlet.
[0020] In this design, the inlet and outlet are positioned to correspond to the blocking parts, and their angles correspond to the angles of the two blocking parts, allowing the valve core to achieve a sealing function by rotation.
[0021] Preferably, the limiting sleeve includes a first limiting part and a second limiting part that are connected to each other. The end face of the first limiting part away from the cavity is the first guiding surface, and the end face of the second limiting part near the cavity is the second guiding surface. The first guiding surface and the second guiding surface are spaced apart to form the annular limiting track.
[0022] In this solution, the limiting sleeve is composed of a first limiting part and a second limiting part. The first guide surface is the end face of the first limiting part, and the second guide surface is the end face of the second limiting part. Therefore, the end faces of the first guide surface and the second guide surface can be arranged opposite each other to form a ring-shaped limiting track, which is more convenient in processing and manufacturing.
[0023] Preferably, the sidewall of the first limiting part extends outward in the radial direction to form a first connecting plate, and the end face of the second limiting part away from the cavity is provided with a second connecting plate. A connecting post is provided between the first connecting plate and the second connecting plate to connect and fix the first limiting part and the second limiting part.
[0024] In this solution, when the end faces of the first limiting part and the second limiting part cooperate to form an annular limiting track, the first connecting plate extending radially outward from the first limiting part and the second connecting plate on the second limiting part are connected by a connecting column, so that the first limiting part and the second limiting part can be fixed together, thereby ensuring that the shape of the annular limiting track will not change.
[0025] Preferably, the antifreeze device further includes an extension sleeve, which is connected to the cavity and extends outward in the radial direction of the cavity, and the first end of the valve core is disposed in the extension sleeve and is movable in the axial direction of the extension sleeve.
[0026] The limiting sleeve is connected to the extension sleeve and is fixed relative to the cavity through the extension sleeve.
[0027] In this solution, by connecting an extension sleeve to the side wall of the cavity, the valve core is limited within the extension sleeve, allowing the valve core to move along a specific trajectory and preventing it from detaching from the cavity during movement. Alternatively, the extension sleeve can be connected to the limiting sleeve, making it easier to fix the limiting sleeve relative to the cavity, thus preventing the annular limiting track on the limiting sleeve from moving.
[0028] Preferably, the antifreeze device also includes an elastic element, one end of which abuts against the second end of the valve core, and the other end is fixed to the limiting sleeve;
[0029] When the snap-fit part snaps into the first groove, the elastic element is in a compressed state and applies a restoring force to the second end of the valve core, moving towards the first end.
[0030] In this design, when the outdoor temperature rises or ice melts due to other reasons, the valve core can be driven by the elastic element to move better toward its first end, so that the snap-fit part can snap into the second groove, thereby sealing the cavity.
[0031] Preferably, an annular groove is formed on the second end face of the valve core, and one end of the elastic element is engaged in the annular groove.
[0032] In this design, the annular groove makes the assembly of the elastic element more secure and less prone to falling off.
[0033] A water heater, characterized in that the water heater comprises:
[0034] Water heater body;
[0035] As described above, the outlet of the antifreeze device is connected to the inlet of the water heater body.
[0036] In this solution, the aforementioned antifreeze device is applied to the water heater body through this setting, effectively solving the defect that water in the internal pipes of the water heater is prone to freezing in cold environments, leading to pipe bursting.
[0037] The positive and progressive effects of this invention are as follows:
[0038] The locking part is located within the annular limiting track. When the valve core moves laterally, the locking part and the annular limiting track interact to generate a rotational movement relative to the limiting sleeve. Under normal use, the locking part engages with the first groove on the first guide surface, limiting the valve core and preventing it from blocking water flow. When the outdoor temperature is low, cold air enters the water heater through the exhaust pipe, causing the water inside the cavity to freeze continuously. The frozen water exerts an external force on the first end of the valve core, causing it to move towards its second end. During this movement, the locking part abuts against the second guide surface and moves under its guidance, thus overcoming the protrusion. When the outdoor temperature rises or the ice melts due to other reasons, the valve core moves towards its first end. The locking part abuts against the first guide surface and moves under its guidance to the second groove adjacent to the first groove, causing the valve core to rotate and the blocking part to rotate to the second angle to close the cavity. If the pipes inside the water heater have already frozen and cracked, the antifreeze device can prevent water from flowing into the water heater, thereby avoiding water leakage from the entire unit, which could cause property damage and safety issues such as water damage to the base plate and electrical leakage. Attached Figure Description
[0039] Figure 1 This is a schematic diagram of the overall structure of the antifreeze device in an embodiment of the present invention.
[0040] Figure 2 This is a schematic diagram of the overall exploded structure of the antifreeze device in an embodiment of the present invention.
[0041] Figure 3 This is a schematic diagram of the valve core structure in an embodiment of the present invention.
[0042] Figure 4 This is a schematic diagram of the antifreeze device in different states in an embodiment of the present invention.
[0043] Figure 5 This is a schematic diagram of the limiting sleeve in an embodiment of the present invention.
[0044] Explanation of reference numerals in the attached figures:
[0045] Antifreeze device 1
[0046] Cavity 100
[0047] Valve core 200
[0048] Valve core first end 210
[0049] Pressure plate 211
[0050] Barrier section 212
[0051] Sealing groove 2111
[0052] 220 valve core second end
[0053] 230 Connector
[0054] Limiting sleeve 300
[0055] First limiting part 310
[0056] Second limiting part 320
[0057] Circular limiting track 330
[0058] First groove 341
[0059] Second groove 342
[0060] Protrusion 343
[0061] First protrusion 352
[0062] Groove 353
[0063] First connecting plate 360
[0064] Second connecting plate 370
[0065] Connecting column 380
[0066] Extension sleeve 400
[0067] Elastic element 500 Detailed Implementation
[0068] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0069] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0071] This embodiment provides an antifreeze device 1, such as... Figure 1 and Figure 2 As shown, the antifreeze device 1, viewed as a whole, mainly includes a cavity 100, a valve core 200, a limiting sleeve 300, an extension sleeve 400, a sealing element, and an elastic element 500. The cavity 100 is a cylindrical tubular structure, primarily used for water flow. The extension sleeve 400 is also a cylindrical tubular structure, with one end connected to the cavity 100 along its axial direction. The extension sleeve 400 and the cavity 100 combine to form a "T"-shaped structure. One end of the limiting sleeve 300 is connected to the extension sleeve 400, allowing the limiting sleeve 300, the extension sleeve 400, and the cavity 100 to form a fixed whole. Figure 3 As shown, the valve core 200 includes a first valve core end 210 and a second valve core end 220, both of which have a cylindrical structure. The second valve core end 220 is disposed inside the cavity 100 via an extension sleeve 400, while the first valve core end 210 protrudes from the extension sleeve 400, i.e., is disposed outside the cavity 100. Figure 2 As shown, an elastic element 500 is sleeved on the outside of the valve core 200. One end of the elastic element 500 abuts against the cylindrical end face of the second end 220 of the valve core, and the other end of the elastic element 500 abuts against the limiting sleeve 300, providing driving force for the movement of the valve core 200. In this embodiment, the elastic element 500 is specifically a compression spring. In other embodiments, any elastic element existing in the prior art can also be used.
[0072] like Figure 2 As shown, the first end of the valve core 200 has a pressure plate 211, and the pressure plate is provided with a blocking part 212. The blocking part 212 is located on the edge of the pressure plate 211. It can rotate around the circular axis of the pressure plate under the action of the valve core 200 and cut off the water flow in the cavity 100 or not interfere with the cavity 100 so that the water flow can pass through.
[0073] In addition, such as Figure 3 As shown, an annular sealing groove 2111 is formed on the side edge of the pressure plate 211. A sealing element is engaged within the annular sealing groove 2111 to prevent water leakage at the connection between the valve core 200 and the extension sleeve 400. In this embodiment, the sealing element is specifically an elastic sealing ring, which can be well engaged within the annular sealing groove 2111. In other embodiments, the sealing element can also be any existing element that can perform a sealing function.
[0074] In this embodiment, as Figure 2 and Figure 3As shown, two snap-fit portions 230 are also provided on the side wall of the second end 220 of the valve core. The two snap-fit portions 230 are arranged opposite to each other. The specific structure of the snap-fit portion 230 is a small cylindrical structure, which extends outward in the radial direction on the side wall of the second end 220 of the valve core. After the limiting sleeve 300 is connected and fixed to the extension sleeve 400, the limiting sleeve 300 can be sleeved on the periphery of the second end 220 of the valve core and fixed relative to the cavity 100. An annular limiting track 330 surrounding the periphery of the valve core 200 is opened on the side wall of the limiting sleeve 300. Both snap-fit portions 230 are movably arranged in the annular limiting track 330. The annular limiting track 330 includes a first guide surface and a second guide surface arranged opposite to each other in sequence along the direction from the first end 210 of the valve core to the second end 220 of the valve core. The first guide surface is continuously and alternately provided with a first groove 341 and a second groove 342, and in A protrusion 343 is formed between the first groove 341 and the second groove 342; when the engaging part 230 engages with the first groove 341, the limiting sleeve 300 limits the valve core 200 to allow water to flow through the cavity 100; when the valve core 200 moves toward the second end 220 of the valve core, the engaging part 230 jumps over the protrusion 343 under the abutment guidance of the second guide surface, and when the valve core 200 moves further toward the first end 210 of the valve core, the engaging part 230 moves to the second groove 342 under the abutment guidance of the first guide surface, so that the valve core 200 closes the cavity 100.
[0075] The specific structure of the limiting sleeve 300 is as follows: Figure 4 and Figure 5As shown, in this embodiment, the limiting sleeve 300 includes a first limiting part 310 and a second limiting part 320. The main structure of the first limiting part 310 and the second limiting part 320 is a cylindrical tube wall structure, and the diameter of the first limiting part 310 and the thickness of the tube wall are the same. The first limiting part 310 extends radially outward on the end face near the cavity 100 to form a first connecting plate 360. The first connecting plate 360 is connected to the extension sleeve 400, so that the first limiting part 310 and the extension sleeve 400 are relatively fixed. The end face of the first limiting part 310 away from the cavity 100 is the first guide surface. The end face of the second limiting part 320 near the cavity 100 is the second guide surface. The first guide surface and the second guide surface are arranged opposite to each other. The gap between the first guide surface and the second guide surface is the annular limiting track 330 of the limiting sleeve 300. The end face of the second limiting part 320 away from the cavity 100 is provided with a second connecting plate 370. The outer dimension of the second connecting plate 370 is larger than the diameter of the second limiting part 320. The first connecting plate 360 and the second connecting plate 370 are connected by a connecting post 380, so that the second limiting part 320 is fixed relative to the first limiting part 310. With this configuration, the end faces of the first and second guide surfaces can be arranged opposite each other to form an annular limiting track 330, which is more convenient in manufacturing. When the end faces of the first limiting part 310 and the second limiting part 320 cooperate to form the annular limiting track 330, the connecting post 380 connects the first connecting plate 360 extending radially outward from the first limiting part 310 and the second connecting plate 370 on the second limiting part 320, so that the first limiting part 310 and the second limiting part 320 can be fixed together, thereby ensuring that the shape of the annular limiting track 330 will not change. Of course, in other embodiments, the limiting sleeve 300 can also be integrally formed, or it can be set in parts and then fixedly connected by other methods in the prior art.
[0076] When the end faces of the first guide surface and the second guide surface are arranged opposite each other to form an annular limiting track 330, a first groove 341 and a second groove 342 are provided on the first guide surface of the first limiting part 310, and a protrusion 343 is formed between the first groove 341 and the second groove 342. On the second guide surface of the second limiting part 320, a first protrusion 352 is provided opposite to the first groove 341 and the second groove 342, and a groove 353 is formed in the corresponding protrusion 343. The opening orientation of the first groove 341 and the second groove 342, and the protrusion orientation of the protrusion 343 are both consistent with the movement direction of the valve core 200 toward its second end, so that the first groove 341 and the second groove 342 hook the locking part 230 in a hook-like manner, further satisfying the limiting sleeve 300 to limit the valve core 200 or the valve core 200 to seal the cavity 100.
[0077] Combination Figure 4 , 5 As shown, when the snap-fit part 230 snaps into the first groove 341, due to the limiting effect of the first groove 341, the valve core 200 is relatively far away from the cavity 100, and the blocking part is located at the first angle, so it cannot block the cavity 100, and the water flow can pass through the cavity 100 normally. When the water in the cavity 100 freezes, a force is applied to the first end 210 of the valve core, causing the valve core 200 to move towards the second end 220. The valve core 200 drives the locking part 230 to move, and the locking part 230 abuts against the second guide surface and moves to the groove 353 under the guidance of the second guide surface. When the force applied to the first end 210 of the valve core disappears, the valve core 200 moves towards the first end 210. At this time, the valve core 200 drives the locking part 230 to move, and the locking part 230 abuts against the first guide surface and moves to the second groove 342 under the guidance of the first guide surface. The locking part 230 is limited at the second groove 342. However, at this position, the valve core 200 is relatively close to the cavity 100, thereby blocking the cavity 100. Water cannot flow through the cavity 100, and resetting is simpler. It is only necessary to move the valve core 200 towards the second end 220 of the valve core, which is convenient to operate.
[0078] The included angle between adjacent first and second grooves in the circumferential direction of the limiting sleeve is 90 degrees. This ensures that the valve core's turning angle is fixed at 90 degrees when moving from the first groove to the second groove, facilitating switching between the first and second angles.
[0079] like Figure 2 The valve core has two blocking sections, positioned at 180 degrees relative to its axis of rotation at the first end of the valve core. The first and second grooves are spaced at a 90-degree angle in the circumferential direction of the limiting sleeve. The two blocking sections can simultaneously close the inlet and outlet, respectively, resulting in a better sealing effect.
[0080] Furthermore, it should be noted that in this embodiment, there are two locking portions 230 on the second end 220 of the valve core, therefore the annular limiting track 330 includes two circulating tracks. For example... Figure 3 As shown, two snap-fit portions 230 are spaced apart in the circumferential direction of the valve core 200, and the included angle between the two snap-fit portions 230 is 180 degrees. Figure 4 , Figure 5As shown, on the first guide surface, the included angle between adjacent first grooves 341 and second grooves 342 in the circumferential direction of the first limiting part 310 is 90 degrees. Therefore, the included angle between adjacent first protrusions 351 and second protrusions 352 in the circumferential direction of the second limiting part 320 is also 90 degrees. Thus, the circumferential angle occupied by a circular track in the circumferential direction of the limiting sleeve 300 is 180 degrees. With this configuration, during the movement of the valve core 200, the two locking portions 230 on the valve core 200 can move simultaneously under the abutment guidance of the first and second guide surfaces, and the movement trajectories of the two locking portions 230 are the same. This facilitates the simultaneous rotation of the two locking portions 230 during the movement of the valve core 200, thereby enabling position switching within the corresponding first groove 341 and second groove 342.
[0081] In this embodiment, there are two snap-fit parts 230. In other embodiments, the number of snap-fit parts 230 can also be set to other numbers. For example, when the included angle between adjacent first grooves 341 and second grooves 342 in the circumferential direction of the first limiting part 310 is 60 degrees, the circumferential angle occupied by a circulation track in the circumferential direction of the limiting sleeve 300 is 120 degrees. At this time, the snap-fit parts 230 can be set to three, and the included angle between the three snap-fit parts 230 in the circumferential direction of the valve core 200 is 120 degrees. For example, when the included angle between adjacent first grooves 341 and second grooves 342 in the circumferential direction of the first limiting part 310 is 45 degrees, the circumferential angle occupied by one circulating track in the circumferential direction of the limiting sleeve 300 is 90 degrees. In this case, the locking part 230 can be set to four, and the included angle between the four locking parts 230 in the circumferential direction of the valve core 200 is 90 degrees; or the locking part 230 can be set to two, and the included angle between the two locking parts 230 in the circumferential direction of the valve core 200 is 180 degrees. And so on.
[0082] When the blocking part is at the first angle, it is located in the middle of the water cavity 100. At this time, the snap-fit part 230 is located in the first groove 341, and the water inlet and the water outlet are connected.
[0083] When the blocking part is at the second angle, it rotates to the bottom and top of the water cavity 100. At this time, the snap-fit part 230 is located in the second groove 342, and the blocking part blocks the water inlet and outlet. The water inlet and outlet are positioned corresponding to the blocking part, and their angles are also corresponding to the angles of the two blocking parts, so that the valve core can achieve the sealing function by rotation.
[0084] like Figure 5As shown, the limiting sleeve 300 includes a first limiting part 310 and a second limiting part 320 that are connected to each other. The end face of the first limiting part 310 away from the cavity 100 is a first guide surface, and the end face of the second limiting part 320 close to the cavity 100 is a second guide surface. The first guide surface and the second guide surface are spaced apart to form an annular limiting track 330.
[0085] As described above, in this embodiment, the antifreeze device 1 includes an extension sleeve 400, which is connected to the cavity 100 and extends outward along the radial direction of the cavity 100. A valve core 200 is disposed within the extension sleeve 400 and is movable along the axial direction of the extension sleeve 400. A limiting sleeve 300 is connected to the extension sleeve 400 and is fixed relative to the cavity 100 via the extension sleeve 400. Specifically, as... Figure 1 and Figure 2 As shown, the extension sleeve 400 has four threaded holes at the end corner of its outward-extending end face relative to the cavity 100. These four threaded holes correspond one-to-one with the four threaded holes on the first connecting plate 360 and are connected by screws to fix the limiting sleeve 300 and the extension sleeve 400. By setting the extension sleeve 400, the movement of the valve core 200 can follow a specific trajectory, preventing the valve core 200 from detaching from the cavity 100 during movement. On the other hand, the extension sleeve 400 can also be connected to the limiting sleeve 300, making it easier to fix the limiting sleeve 300 relative to the cavity 100, thereby preventing the annular limiting track 330 on the limiting sleeve 300 from moving. Of course, in other embodiments, the extension sleeve 400 can be omitted, and the side wall of the valve core 200 can be directly connected to the cavity 100 and moved relative to the cavity 100. However, it should be noted that the valve core 200 should be prevented from detaching from the cavity 100 during movement, and the sealing between the valve core 200 and the cavity 100 should be ensured.
[0086] Figure 4 The diagram shows the structure of the antifreeze device 1 in different states. The lower part of the diagram shows the correspondence between the locking part 230 and the different positions of the annular limiting track 330 in different states, while the upper part shows the positional relationship of the blocking part 212 in the same state.
[0087] Figure 4 (a) is a structural schematic diagram of the antifreeze device 1 in normal use, combined with Figure 5 It can be seen that at this time, the snap-fit part 230 is snapped into the first groove 341 and is held in place by the elastic member 500. The blocking part 212 is horizontal in the cavity 100 and does not block the upper and lower water outlets and water inlet.
[0088] Figure 4 (b) is a structural schematic diagram of the antifreeze device 1 after the water freezes in extremely cold weather. Figure 5It can be seen that at this time, the water in the cavity 100 freezes and expands, pushing the valve core 200 to move towards the second end 220 and compressing the elastic part 500. The locking part 230 moves towards the second end and gradually moves into the groove part 353 under the action of the second guide surface. The elastic element 500 is compressed by force. The blocking part 212 rotates within the cavity 100.
[0089] Figure 4 (b) is a structural diagram of the antifreeze device 1 after the ice melts as the weather warms up, combined with... Figure 5 It can be seen that at this time, the ice in the cavity 100 melts and no longer presses against the valve core 200. The elastic element 500 returns and pushes the valve core 200 to move towards the first end 210. The locking part 230 moves towards the first end and gradually moves into the groove part 342 under the action of the first guide surface. The blocking part 212 rotates 90 degrees in the cavity 100 from the horizontal direction to the vertical direction and just seals the inlet and outlet.
[0090] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.
Claims
1. An antifreeze device, characterized in that, The antifreeze device includes: A cavity for the passage of water; The valve core includes a first end located inside the cavity and a second end located outside the cavity. A snap-fit portion is provided on the side wall of the valve core. The valve core is rotatable about the extension direction from the first end to the second end. A blocking portion is provided at the first end of the valve core. The blocking portion can close or open the cavity by rotating the valve core. A limiting sleeve is fitted around the valve core and fixed relative to the cavity. An annular limiting track is formed on the side wall of the limiting sleeve, surrounding the valve core. The snap-fit part is movably disposed within the annular limiting track. The annular limiting track includes a first guide surface and a second guide surface arranged opposite to each other in sequence along the direction from the first end to the second end of the valve core. The first guide surface has a first groove and a second groove at different positions in the circumferential direction of the annular limiting track, and a protrusion is formed between the first groove and the second groove. When the snap-fit part snaps into the first groove, the valve core is located at the first angle, and the blocking part opens the cavity; When the valve core moves toward its second end, the locking part jumps over the protrusion under the abutment guidance of the second guide surface, so that the locking part can move to the second groove under the abutment guidance of the first guide surface when the valve core moves further toward its first end, and rotate the valve core to the second angle. After the blocking part rotates, it closes the cavity. The included angle between the adjacent first groove and the second groove in the circumferential direction of the limiting sleeve is α degrees; There are two blocking parts, and the two blocking parts are arranged at 180 degrees relative to the rotation axis of the valve core at the first end of the valve core; The included angle between the first groove and the second groove in the circumferential direction of the limiting sleeve is 90 degrees.
2. The antifreeze device as described in claim 1, characterized in that, The cavity includes an inlet and an outlet; When the blocking part is at the first angle, the inlet and the outlet are connected; When the barrier is at the second angle, the barrier blocks the inlet and / or the outlet.
3. The antifreeze device as described in claim 1, characterized in that, The limiting sleeve includes a first limiting part and a second limiting part that are connected to each other. The end face of the first limiting part away from the cavity is the first guiding surface, and the end face of the second limiting part close to the cavity is the second guiding surface. The first guiding surface and the second guiding surface are spaced apart to form the annular limiting track.
4. The antifreeze device as described in claim 3, characterized in that, The sidewall of the first limiting part extends outward in the radial direction to form a first connecting plate, and the end face of the second limiting part away from the cavity is provided with a second connecting plate. A connecting post is provided between the first connecting plate and the second connecting plate to connect and fix the first limiting part and the second limiting part.
5. The antifreeze device as described in claim 1, characterized in that, The antifreeze device also includes an extension sleeve, which is connected to the cavity and extends outward along the radial direction of the cavity. The first end of the valve core is disposed inside the extension sleeve and is movable along the axial direction of the extension sleeve. The limiting sleeve is connected to the extension sleeve and is fixed relative to the cavity through the extension sleeve.
6. The antifreeze device as described in claim 1, characterized in that, The antifreeze device also includes an elastic element, one end of which abuts against the second end of the valve core, and the other end is fixed to the limiting sleeve; When the snap-fit part snaps into the first groove, the elastic element is in a compressed state and applies a restoring force to the second end of the valve core, moving towards the first end.
7. The antifreeze device as described in claim 6, characterized in that, An annular groove is provided on the second end face of the valve core, and one end of the elastic element is engaged in the annular groove.
8. A water heater, characterized in that, The water heater includes: Water heater body; The antifreeze device as described in any one of claims 1 to 7, wherein the outlet of the antifreeze device is connected to the inlet of the water heater body.