Anti-freezing device and water heater using the same

Abstract

The application discloses a kind of anti-freezing device and water heater using the anti-freezing device, including cavity, valve core, elastic element, slider and locking piece, locking piece is rotatably connected with the pivot of slider, and pivot is between the first end and the second end of locking piece, first elastic element is arranged between the second end of locking piece and slider, and the second end of locking piece is pushed by first elastic element, to make the first end of locking piece be hooked in the recess of valve core, first protrusion is arranged in cavity, first protrusion is close to the second end of cavity, and first guide surface is arranged to the first end of cavity, first guide surface gradually extends to slider along the direction of slider movement;When valve core moves to the second end of cavity, the second end of locking piece moves under the action of first guide surface, the first end of locking piece is separated from recess, so that valve core closes cavity, if pipe in water heater is frozen at this time, anti-freezing device can prevent water flow into water heater, to avoid loss and safety problem.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water inlet valves, in particular to a freeze-proof device and a water heater using the same. BACKGROUND

[0002] A water heater is a device that increases the temperature of cold water to hot water within a certain time through various physical principles. Taking a gas water heater as an example, in the use process, the water inlet pipe of the gas water heater delivers cold water to the heat exchanger, and the gas combustion heats the water in the heat exchanger, and then the water is delivered out through the water outlet pipe for the user to use.

[0003] The gas water heater is generally connected to the outdoor environment through the exhaust pipe. In the cold winter, when the outdoor temperature is low, cold air is easy to enter the interior of the water heater along the exhaust pipe, causing the water in the pipes inside the water heater to freeze, and the volume increases to easily crack the pipes. When the temperature rises, the ice in the pipes melts, and if the user does not timely close the water inlet valve, the whole machine will leak, causing the bottom plate to be soaked, electrical leakage, and other property losses and safety problems.

[0004] In view of the above situation, the gas water heater installed in the cold northern environment generally has an electric heating freeze-proof device installed, which plays a certain freeze-proof function. However, the electric heating freeze-proof device must be normally started when the water heater is powered on. If there is a power failure, for example, the user unplugs the power plug, the home power is off, etc., the electric heating device may still not start, and the water heater pipe may freeze and crack. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the defect that the installation of an electric heating device in the prior art cannot completely solve the freeze cracking of the pipes in the water heater at low temperatures, thereby causing water leakage, and to provide a freeze-proof device and a water heater using the same.

[0006] The present application solves the above technical problems by the following technical solutions:

[0007] A freeze-proof device, the freeze-proof device comprising:

[0008] a cavity for the passage of water flow;

[0009] a valve core, the first end of the valve core being located in the cavity, the second end of the valve core being located outside the cavity, and the water flow passing between the first end of the valve core and the first end of the cavity;

[0010] a resilient element for pushing the valve core to move towards the first end of the cavity;

[0011] A slider is slidably arranged in the cavity from the first end to the second end of the cavity, and a rotating shaft is arranged on the outer periphery of the slider;

[0012] A locking member is rotatably connected with the rotating shaft and is located between the first end and the second end of the locking member, a first elastic member is arranged between the second end of the locking member and the slider, and the second end of the locking member is pushed by the first elastic member to make the first end of the locking member hook the recess of the valve core, and a first protrusion is arranged in the cavity, the first protrusion is arranged close to the second end of the cavity, and a first guide surface is arranged on the first protrusion towards the first end of the cavity, and the first guide surface gradually extends to the slider along the movement direction of the slider;

[0013] When the valve core moves towards the second end of the cavity, the second end of the locking member moves under the action of the first guide surface, the first end of the locking member is separated from the recess, and the valve core closes the cavity.

[0014] In this scheme, under normal use of the water heater, the first end of the valve core is in the cavity and forms a passage with the first end of the cavity, the water flows through the passage, the second end of the valve core is connected with the slider through the locking member, and the valve core is prevented from moving along the first end of the cavity under the action of the elastic element and abutting against the first end of the cavity, that is, the first end of the valve core is limited by the slider and the locking member and cannot block the water flow, and at this time the water flows normally from the cavity. When the outdoor temperature is low, cold air enters the interior of the water heater along the exhaust pipe to cause the water in the cavity to freeze continuously, and because the volume of the water increases after freezing, an external force is applied to the first end of the valve core to move the valve core towards the second end thereof, and the movement of the valve core drives the locking member and the slider to move simultaneously. In this process, the second end of the locking member is in contact with the first guide surface of the first protrusion in the cavity, and under the action of the first guide surface, the first elastic member is compressed and the locking member rotates around the rotating shaft, the first end of the locking member is transformed from the state of being hooked in the recess of the valve core to the state of being separated from the recess, the valve core is disconnected with the slider, and the valve core moves along the first end of the cavity under the action of the elastic element to close the cavity. At this time, if the pipeline in the water heater has been frozen, the anti-freezing device can prevent water from entering the water heater, thereby avoiding water leakage, floor soaking, electrical leakage and other property losses and safety problems.

[0015] Further, the second end of the locking member is provided with a second guide surface, the second guide surface gradually extends to the slider along the movement direction of the slider, and the second guide surface is oppositely arranged with the first guide surface.

[0016] In the scheme, through the arrangement, the second guide surface is arranged opposite to the first guide surface, the second end of the locking piece makes the first guide surface of the first protrusion more smooth when abutting against the second end of the locking piece under the action of the first guide surface and the second guide surface, and the first elastic piece can be compressed smoothly and drive the first end of the locking piece to rotate around the rotation shaft.

[0017] Further, the second protrusion is arranged on the slider corresponding to the first elastic piece, and the first elastic piece is sleeved on the outer circumferential side of the second protrusion.

[0018] In the scheme, through the arrangement, the end of the first elastic piece connected with the slider is sleeved in the second protrusion, and the first elastic piece is limited by the second protrusion, so as to improve the connection reliability of the first elastic piece and the slider.

[0019] Further, the slider is in a cylindrical structure, a plurality of rotation shafts are arranged on the outer circumferential side of the slider in intervals, a plurality of locking pieces are arranged corresponding to the rotation shafts, and a plurality of first elastic pieces are arranged corresponding to the locking pieces.

[0020] In the scheme, through the arrangement, the number of the locking pieces and the number of the rotation shafts are arranged to be multiple, so as to increase the connection of the valve core and the slider, and further increase the connection strength and the connection reliability of the slider and the valve core, and the number of the first elastic pieces for pushing the second end of the locking piece is increased.

[0021] Further, the anti-freezing device further comprises a reset unit, the reset unit comprises a first end located in the cavity and a second end located outside the cavity, the first end of the reset unit is connected with the slider and moves towards the first end of the cavity under the action of the reset unit, when the reset unit moves towards the first end of the cavity, the second end of the locking piece is separated from the first protrusion, the locking piece rotates under the action of the first elastic piece, the first end of the locking piece is hooked in the recess of the valve core, so as to open the cavity when the reset unit moves towards the second end of the cavity.

[0022] In the scheme, through the arrangement, the first end of the reset unit is connected with the slider, the second end of the reset unit is located outside the cavity and is used for being grabbed by the operator to reset, after the first end of the valve core closes the cavity, the second end of the reset unit is pushed to move the slider by pushing the second end of the reset unit and driving the first end of the reset unit, the slider is close to the second end of the valve core, the second end of the locking member on the slider is separated from the extrusion of the first protrusion, the first elastic member continues to push the second end of the locking member to drive the locking member to rotate around the rotating shaft, the first end of the locking member is correspondingly rotated and hooked in the recess of the valve core, the valve core and the slider are reconnected, the reset unit is moved towards the second end of the cavity and the valve core is moved by the slider to make the first end of the valve core open the cavity, the water flows into the cavity and the reset of the valve core is realized.

[0023] Further, the reset unit comprises a second elastic member, a third elastic member and a handle, one end of the handle is movably connected to the outer surface of the cavity, the other end of the handle extends into the cavity and is connected with the slider through the second elastic member, the handle is provided with a containing cavity, the third elastic member is arranged in the containing cavity and the two ends of the third elastic member abut against the outer surface of the cavity and the cavity bottom of the containing cavity respectively.

[0024] In the scheme, through the arrangement, the third elastic member makes the handle have the function of reciprocating motion, the second elastic member makes the slider have the function of buffering when the valve core moves after being reset and the water flows through the cavity, and the slider will not push the first end of the handle to the inner wall surface of the cavity and extrude to cause deformation when the valve core pushes the slider to move towards the second end of the cavity under the condition that the water flows and is not frozen.

[0025] Further, the first slide and the second slide are coaxially arranged in the cavity along the moving direction of the valve core, the second slide is arranged in the first slide, the valve core and the elastic member are located in the first slide, the slider and the locking member are located in the second slide, and the first protrusion is arranged on the inner wall of the second slide.

[0026] In the scheme, through the arrangement, the elastic member and the valve core are arranged in the first slide, and the slider and the locking member are arranged in the second slide to avoid structural interference between the elastic member and the slider or the locking member, so that the structural reliability of the anti-freezing device is maintained.

[0027] Further, the third protrusion is arranged on the inner wall of the second slide, the third protrusion is arranged close to the first end of the cavity and is arranged in a spaced manner with the first protrusion.

[0028] In the present scheme, through the arrangement, the third protrusion is arranged apart from the first protrusion, so that the locking member is always located between the third protrusion and the first protrusion under the driving of the slider, avoiding the locking member from being detached from the second sliding channel and losing the function of locking the valve core.

[0029] Further, the first end of the valve core is provided with a mounting groove corresponding to the side of the inner wall of the first sliding channel, and a sealing member is arranged in the mounting groove.

[0030] In the present scheme, through the arrangement, the sealing member seals the contact part of the first end of the valve core and the inner wall of the first sliding channel, improving the sealing property of the valve core to block the water flow to the second end of the valve core.

[0031] A water heater comprises a water heater body and the anti-freezing device as described above, and the water outlet of the anti-freezing device is connected with the water inlet of the water heater body.

[0032] In the present scheme, through the arrangement, the anti-freezing device as described above is applied to the water heater body, effectively solving the defect that the installation of the electric heating device in the water heater cannot completely solve the cracking of the pipeline in the water heater at low temperature, thereby causing water leakage.

[0033] The positive progress effect of the present application is that:

[0034] Under the normal use of the water heater, the first end of the valve core is located in the cavity and forms a passage with the first end of the cavity, and the water flows through the passage, the second end of the valve core is connected with the slider through the locking member, preventing the valve core from moving along the first end of the cavity under the action of the elastic element and abutting against the first end of the cavity, that is, the first end of the valve core is limited by the slider and the locking member and cannot block the water flow, at this time, the water flows normally from the cavity. When the outdoor temperature is relatively low, the cold air enters the interior of the water heater along the exhaust pipe, causing the water in the cavity to freeze continuously. Since the volume of the water increases after freezing, an external force is applied to the first end of the valve core, promoting the valve core to move in the direction of the second end. The valve core moves to drive the locking member and the slider to move simultaneously. In the process, the second end of the locking member is in contact with the first guide surface of the first protrusion in the cavity, and under the action of the first guide surface, the first elastic element is compressed and the locking member rotates around the rotation shaft. The first end of the locking member is transformed from the state of being hooked in the recess of the valve core to the state of being separated from the recess. The valve core is disconnected with the slider, and the valve core moves along the first end of the cavity under the action of the elastic element and closes the cavity. At this time, if the pipeline in the water heater has been cracked, the anti-freezing device can prevent the water flow from entering the water heater, thereby avoiding the water leakage of the whole machine, causing the floor to be soaked in water, electrical leakage and other property losses and safety problems. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a whole structure diagram of the anti-freezing device in Embodiment 1 of the present application.

[0036] Figure 2 It is the overall structure profile schematic view of the valve core in the open state in the embodiment 1 of the application.

[0037] Figure 3 It is the overall structure profile schematic view of the second end of the locking member and the first protrusion in the contact state in the embodiment 1 of the application.

[0038] Figure 4 It is the overall structure profile schematic view of the valve core in the state of being separated from the locking member in the embodiment 1 of the application.

[0039] Figure 5 It is the overall structure profile schematic view of the handle in the compression state to push the slider to move in the embodiment 1 of the application.

[0040] Figure 6 It is the position relation diagram of the valve core and the elastic element in the embodiment 1 of the application.

[0041] Figure 7 It is the position relation diagram of the slider and the locking member in the embodiment 1 of the application.

[0042] Explanation of reference signs:

[0043] Cavity 100

[0044] Valve core 10

[0045] Recess 11

[0046] Elastic element 20

[0047] Slider 30

[0048] Supporting part 31

[0049] Rotating shaft 32

[0050] Second protrusion 33

[0051] Locking member 40

[0052] Second guide surface 41

[0053] First elastic member 50

[0054] Reset unit 60

[0055] Second elastic member 61

[0056] Third elastic member 62

[0057] Handle 63

[0058] First slide 70

[0059] Second slide 80

[0060] Third protrusion 81

[0061] Seal 90

[0062] Extension sleeve 200

[0063] First protrusion 201

[0064] First guide surface 202

[0065] Fixing member 300 DETAILED DESCRIPTION

[0066] The present application will be further described by way of example with reference to the accompanying drawings, in which:

[0067] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application, and all other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the scope of the present application.

[0068] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0069] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0070] Example 1

[0071] The present embodiment provides an anti-freezing device, such as Figure 1As shown in the drawings, the anti-freezing device 1 is mainly composed of a cavity 100, an extension sleeve 200, a fixing member 300 and a reset unit 60 from the outside. The cavity 100 is a cylindrical tubular structure, mainly used for water flow. The extension sleeve 200 is also a cylindrical tubular structure, and one end of the extension sleeve 200 is connected to the cavity 100 along the axial direction. The extension sleeve 200 and the cavity 100 form a "T" shape structure. The fixing member 300 is a plate, and one side of the fixing member 300 is connected to the extension sleeve 200, and the other side is connected to the reset unit 60.

[0072] As shown in the drawings, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The anti-freezing device further comprises a valve core 10 and an elastic element 20. The valve core 10 includes a first end located in the cavity 100 and a second end located outside the cavity 100. The first end of the valve core 10 forms a passage for water flow in the first end of the cavity 100. The first end of the valve core 10 is used to isolate the water flow to prevent the water flow from flowing into the second end of the valve core 10. The elastic element 20 is a spring, and one end of the spring abuts the side of the first end of the valve core 10 away from the water flow. The other end of the spring abuts the internal space of the extension sleeve 200. When the water flow flows in the passage, the first end of the valve core 10 is subjected to pressure. The valve core 10 is balanced with the pressure generated by the water flow under the action of the elastic element 20 to enable the water flow to continuously flow through the passage. When the pressure generated by the water flow is greater than the force of the elastic element 20, the valve core 10 moves from the first end of the cavity 100 to the second end and moves into the internal space of the extension sleeve 200. When the pressure generated by the water flow is less than the force of the elastic element 20, the valve core 10 moves from the extension sleeve 200 to the first end of the cavity 100 to close the cavity 100.

[0073] The anti-freezing device further comprises a sliding block 30 arranged in the inner space of the extension sleeve 200. The first end of the sliding block 30 is arranged towards the second end of the valve core 10, and the second end of the sliding block 30 is arranged towards the inner wall of the second end of the inner space of the extension sleeve 200. A supporting portion 31 is protrusively arranged on the outer circumferential side of the sliding block 30, and the supporting portion 31 extends along the inner wall of the inner space of the extension sleeve 200 and is arranged perpendicularly to the outer surface of the sliding block 30. A notch is arranged on the supporting portion 31, and a rotating shaft 32 is horizontally arranged in the notch. The locking piece 40 is rotationally connected to the rotating shaft 32, and the connecting position of the locking piece 40 and the rotating shaft 32 is between the first end and the second end of the locking piece 40. The second end of the locking piece 40 is provided with the first elastic member 50 relative to the outer surface of the sliding block 30, and the first end of the locking piece 40 is bent. The second end of the locking piece 40 is pushed by the first elastic member 50, so that the locking piece 40 rotates, and the first end of the locking piece 40 is hooked to the recessed portion 11 on the valve core 10. The recessed portion 11 is a groove arranged on the surface of the valve core 10. The sliding block 30 and the valve core 10 are connected through the sliding block 30 and the locking piece 40. Furthermore, the first protrusion 201 is arranged in the inner space of the extension sleeve 200 adjacent to the second end of the cavity 100. The first protrusion 201 is arranged close to the second end of the inner space of the extension sleeve 200, and the first guiding surface 202 is arranged on the first protrusion 201 towards the first end of the inner space. The first guiding surface 202 is a plane and gradually extends to the sliding block 30 along the direction of the sliding block 30 from the first end of the cavity 100 towards the second end of the inner space of the extension sleeve 200. When the second end of the locking piece 40 contacts the first guiding surface 202 of the first protrusion 201, the second end of the locking piece 40 moves in the direction close to the sliding block 30 and compresses the first elastic member 50. The locking piece 40 rotates, and the first end of the locking piece 40 is separated from the recessed portion 11. The valve core 10 is pushed to the first end of the cavity 100 by the elastic member 20 to close the cavity 100. When the second end of the locking piece 40 is not in contact with the first guiding surface 202 of the first protrusion 201, the second end of the locking piece 40 keeps the valve core 10 locked. That is, when the water flow passes through the passage normally, the valve core 10 does not close the cavity 100.

[0074] In combination Figure 2 and Figure 3 with the drawings, under the normal use condition of the water heater, the first end of the valve core 10 is in the cavity 100 and forms a passage with the first end of the cavity 100. The water flow passes through the passage. The second end of the valve core 10 is connected with the sliding block 30 through the locking piece 40, so as to prevent the valve core 10 from moving along the first end of the cavity 100 and abutting against the first end of the cavity 100 under the action of the elastic member 20. That is, the first end of the valve core 10 is limited by the sliding block 30 and the locking piece 40 and cannot block the water flow. At this time, the water flow normally passes through the cavity 100. Figure 3 , Figure 4 and Figure 5As shown, when the outdoor temperature is low, cold air enters the interior of the water heater along the exhaust pipe, causing the water in the cavity 100 to freeze. Because the volume of the water increases after freezing, an external force is exerted on the first end of the valve core 10, prompting the valve core 10 to move in the direction of its second end. The movement of the valve core 10 drives the locking member 40 and the slider 30 to move simultaneously. In this process, the second end of the locking member 40 is in contact with the first guide surface 202 of the first protrusion 201 in the internal space of the extension sleeve 200 adjacent to the cavity 100, and under the action of the first guide surface 202, the first elastic member 50 is compressed and the locking member 40 rotates around the rotation shaft 32. The first end of the locking member 40 changes from the state of being hooked in the recess 11 of the valve core 10 to the state of being separated from the recess 11, the valve core 10 is disconnected from the slider 30, and the valve core 10 moves along the first end of the cavity 100 under the action of the elastic element 20 and closes the cavity 100. At this time, if the pipeline in the water heater has been frozen, the anti-freezing device can prevent water from flowing into the water heater, thereby avoiding water leakage, causing the floor to be soaked, electrical leakage, and other property losses and safety problems.

[0075] Further, as shown in Figure 2 The second end of the locking member 40 is provided with a second guide surface 41, which gradually extends to the slider 30 from the first end of the cavity 100 to the direction of its second end, and the second guide surface 41 is oppositely arranged with the first guide surface 202 along the movement direction of the slider 30.

[0076] Specifically, the second guide surface 41 is a plane and gradually extends to the slider 30 from the first end of the cavity 100. By oppositely arranging the second guide surface 41 with the first guide surface 202, when the second end of the locking member 40 is in contact with the first protrusion 201, the first guide surface 202 of the first protrusion 201 is more smooth when abutting against the second end of the locking member 40 under the action of the first guide surface 202 and the second guide surface 41. The locking member 40 rotates around the rotation shaft 32, the second end of the locking member 40 approaches the outer surface of the slider 30, and the first elastic member 50 can be smoothly compressed to drive the first end of the locking member 40 to rotate around the rotation shaft 32, thereby realizing the state that the first end of the locking member 40 is separated from the recess 11.

[0077] In other embodiments, the first guide surface 202 and the second guide surface 41 can also be arc surfaces or other existing structures for guiding, and the purpose is also to smoothly realize the abutment of the first protrusion 201 during the sliding process of the slider 30, and to compress the first elastic member 50 by the second end of the locking member 40, and to realize the state that the first end of the locking member 40 is smoothly separated from the recess 11.

[0078] In the embodiment, the slider 30 is provided with a second protrusion 33 corresponding to the first elastic member 50, the second protrusion 33 is in a cylindrical structure and extends outward from the outer surface of the slider 30, the first elastic member 50 is sleeved on the outer circumferential side of the second protrusion 33, the second protrusion 33 limits the connection between the first elastic member 50 and the slider 30, so as to improve the connection reliability of the first elastic member 50 and the slider 30.

[0079] In addition, in the embodiment, the second end of the locking member 40 is also provided with a protrusion, which is used to correspond to the second protrusion 33 and the first elastic member 50 is also sleeved on the protrusion, so as to increase the connection reliability of the first elastic member 50 and the locking member 40. This is prior art and will not be described in detail here.

[0080] As shown in Figure 6 In the embodiment, the slider 30 is in a cylindrical structure and has an opening, the opening is arranged towards the second end of the valve core 10, so that when the valve core 10 moves from the first end to the second end of the cavity 100, the second end of the valve core 10 can extend into the opening, thereby reducing the moving distance of the slider 30 and the size of the extension sleeve 200, reducing the manufacturing cost of the anti-freezing device and improving the space utilization. The support part 31 on the slider 30 is provided with a plurality of notches, each notch is provided with a rotating shaft 32 corresponding to each notch, a plurality of locking members 40 are arranged corresponding to the plurality of notches, and the first elastic member 50 for pushing the second end of the locking member 40 is also provided with a plurality of corresponding locking members 40. By increasing the number of locking members 40 and rotating shafts 32 on the slider 30, the connection between the valve core 10 and the slider 30 is increased, thereby increasing the connection strength and connection reliability of the slider 30 and the valve core 10. In the case that a single locking member 40 is accidentally separated from the valve core, the valve core 10 will not be accidentally closed when the water flows normally.

[0081] As shown in Figure 5As shown, the reset unit 60 in the embodiment is movably connected to the extension sleeve 200, and the first end of the reset unit 60 is located in the internal space of the extension sleeve 200, and the second end of the reset unit 60 is located on the outer circumferential side of the extension sleeve 200. The first end of the reset unit 60 is connected to the sliding block 30. After the first end of the valve core 10 closes the cavity 100, the second end of the reset unit 60 is held by the operator, and the reset unit 60 is pushed along the first end of the cavity 100 to move the sliding block 30 in the direction of the first end of the cavity 100. When the reset unit 60 pushes the sliding block 30 to move towards the first end of the cavity 100, the second end of the locking piece 40 is separated from the first protrusion 201. At this time, the first elastic piece 50 rebounds and pushes the locking piece 40 to rotate. The first end of the locking piece 40 is hooked to the recess 11 of the valve core 10, so as to realize the reconnection of the sliding block 30 and the valve core 10 after the valve core 10 closes the cavity 100. When the second end of the reset unit 60 is held by the operator and pulled along the second end of the cavity 100, the sliding block 30 moves in the direction of the second end of the cavity 100, so as to open the cavity 100 by the reset unit 60. The water flow can pass through the passage normally and the reset of the valve core 10 is realized.

[0082] Further, the reset unit 60 comprises a second elastic piece 61, a third elastic piece 62 and a handle 63. The handle 63 is movably connected to the outer surface of the extension sleeve 200 adjacent to the cavity 100. The extension sleeve 200 is closed by the fixing piece 300, and the fixing piece 300 is provided with a through hole. The first end of the handle 63 extends into the through hole and is connected to the sliding block 30 through the second elastic piece 61. The handle 63 is a cylindrical structure and has an accommodating cavity inside. The end of the handle 63 extending into the through hole is provided with a limiting portion to prevent the handle 63 from being separated from the fixing piece 300 and improve the reusability of the reset unit 60. The third elastic piece 62 is arranged in the accommodating cavity, and the two ends of the third elastic piece 62 abut against the outer surface of the fixing piece 300 and the bottom of the accommodating cavity, respectively.

[0083] Specifically, the handle 63 is located at the end of the inner space of the extension sleeve 200, extends along the surface of the fixing member 300, and is provided with a protrusion for limiting the displacement of the second elastic member 61. The second end of the sliding block 30 is correspondingly provided with a groove. Under the joint action of the groove and the protrusion for limiting the displacement of the second elastic member 61, the connection reliability of the second elastic member 61 is improved. The second elastic member 61 enables the sliding block 30 to have a buffering function when the water flow passes through the cavity 100 and pushes the valve core 10 to move after the reset. In this way, when the valve core 10 pushes the sliding block 30 to move towards the fixing member 300 under the condition that the water flow flows and is not frozen, the sliding block 30 will not push the first end of the handle 63 to the surface of the fixing member 300 and squeeze the fixing member 300 to cause deformation. In addition, the handle 63 is enabled to have a reciprocating motion function by the third elastic member 62. Therefore, the reset unit 60 can return to the initial state after resetting the valve core 10 so as to continue to reset next time, thereby improving the reuse rate of the reset unit 60 and saving the manufacturing cost.

[0084] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 5 , the cavity 100 is coaxially provided with a first sliding channel 70 and a second sliding channel 80 in the inner space adjacent to the extension sleeve 200 along the moving direction of the valve core 10. The first sliding channel 70 is an inner wall of the inner space, which has a cylindrical structure. The second sliding channel 80 also has a cylindrical structure and is coaxially arranged with the first sliding channel 70. The second sliding channel 80 is arranged in the first sliding channel 70 and extends from the surface of the fixing member 300 along the first end of the cavity 100. The first protrusion 201 is located on the inner wall of the second sliding channel 80 facing the sliding block 30. The valve core 10 and the elastic element 20 are located in the first sliding channel 70, and the sliding block 30 and the locking member 40 are located in the second sliding channel 80. By arranging the elastic element 20 and the valve core 10 in the first sliding channel 70 and arranging the sliding block 30 and the locking member 40 in the second sliding channel 80, structural interference between the elastic element 20 and the sliding block 30 or the locking member 40 is avoided, and the structural reliability of the anti-freezing device is maintained.

[0085] Further, the inner wall of the second sliding channel 80 is provided with a third protrusion 81, which is arranged close to the first end of the cavity 100 and is spaced apart from the first protrusion 201.

[0086] Specifically, the third protrusion 81 extends along the inner wall of the second slide 80 towards the slider 30, and the end of the third protrusion 81 towards the slider 30 is in a rectangular structure, and the end of the third protrusion 81 in the rectangular structure can play a role of blocking the movement of the locking piece 40. In the normal use of the water heater, the locking piece 40 is located between the first protrusion 201 and the third protrusion 81, and the movement range of the locking piece 40 in the second slide 80 is limited by the third protrusion 81, so as to avoid the locking piece 40 from being separated from the second slide 80 and losing the function of locking the valve core 10.

[0087] As shown in Figure 6 The first end of the valve core 10 is provided with a mounting groove corresponding to the side of the inner wall of the first slide 70, and the mounting groove is provided with a sealing piece 90, which is an annular sealing ring, and the material thereof is rubber in the prior art. Of course, in other embodiments, it can also be other materials for sealing water flow, and the purpose is to improve the sealing performance of the contact part of the valve core 10 and the inner wall of the first slide 70, so as to prevent the water flow from flowing to the second end of the valve core 10.

[0088] The embodiment also provides a water heater, which comprises a water heater body and the anti-freezing device mentioned in the embodiment, and the water outlet of the anti-freezing device is connected with the water inlet of the water heater body.

[0089] Specifically, in the normal use of the water heater, the water flow passes through the passage to the water outlet and then to the water inlet of the water heater body, at this time, the water flow pressure between the first end of the valve core 10 in the anti-freezing device and the first end of the cavity 100 is equal to the pressure of the elastic element 20 pushing the valve core 10, the locking piece 40 is located between the first protrusion 201 and the third protrusion 81, and the cavity 100 remains open to make the water flow pass smoothly.

[0090] When the outdoor temperature is low, cold air enters the interior of the water heater along the exhaust pipe, causing the water in the cavity 100 to freeze. Because the volume of the water increases when it freezes, the water flow pressure between the first end of the valve core 10 and the first end of the cavity 100 is greater than the pressure of the elastic element 20 pushing the valve core 10. The water flow pushes the valve core 10 to move along the second end of the cavity 100, and the elastic element 20 is compressed. When the valve core 10 moves, the locking member 40 connected to the slider 30 also moves. When the locking member 40 contacts the first protrusion 201, the second end of the locking member 40 is compressed, causing the locking member 40 to rotate and disengage the first end of the locking member 40 from the recess 11. The valve core 10 is now unlocked and moves toward the first end of the cavity 100 under the action of the elastic element 20, so that the cavity 100 is closed. When the outdoor temperature rises or the ice melts for other reasons, the reset unit 60 pushes the slider 30 and disengages the locking member 40 from the first protrusion 201. The locking member 40 rotates and hooks into the recess 11 of the valve core 10. Pulling the reset unit 60 moves the valve core 10 and finally opens the cavity 100, allowing the water to flow smoothly. The anti-freezing device is applied to the water heater body, effectively solving the problem of water leakage caused by the installation of an electric heating device in the water heater, which cannot completely solve the problem of pipe cracking in the water heater at low temperatures.

[0091] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application 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 application, and such changes and modifications fall within the protection scope of the present application.

Claims

1. A freeze protection device, characterized in that, The anti-freezing device comprises: a cavity for water flow passing through; a valve core, a first end of which is located in the cavity, a second end of which is located outside the cavity, and the water flow passes through between the first end of the valve core and the first end of the cavity; a resilient element for pushing the valve core to move towards the first end of the cavity; a slider which can slide from the first end of the cavity towards the second end of the cavity when the valve core moves, and a rotating shaft is arranged on the outer periphery of the slider; a locking member which is rotationally connected with the rotating shaft and the rotating shaft is located between the first end and the second end of the locking member, a first elastic member is arranged between the second end of the locking member and the slider, and the first elastic member pushes the second end of the locking member so that the first end of the locking member is hooked in a recess of the valve core, a first protrusion is arranged in the cavity, the first protrusion is arranged close to the second end of the cavity, and a first guide surface is arranged on the first protrusion towards the first end of the cavity, and the first guide surface gradually extends towards the slider along the movement direction of the slider; when the valve core moves towards the second end of the cavity, the second end of the locking member moves under the action of the first guide surface, the first end of the locking member is separated from the recess, and the valve core closes the cavity.

2. The freeze protection apparatus of claim 1, wherein The second end of the locking member is provided with a second guide surface which gradually extends towards the slider along the movement direction of the slider and is arranged opposite to the first guide surface.

3. The freeze protection apparatus of claim 1, wherein A second protrusion is arranged on the slider corresponding to the first elastic member, and the first elastic member is sleeved on the outer periphery of the second protrusion.

4. The freeze protection apparatus of claim 1, wherein The slider is in a cylindrical structure, a plurality of rotating shafts are arranged on the outer periphery of the slider at intervals, a plurality of locking members are arranged corresponding to the rotating shafts, and a plurality of first elastic members are arranged corresponding to the locking members.

5. The freeze protection apparatus of claim 1, wherein The anti-freezing device further comprises a reset unit which comprises a first end located in the cavity and a second end located outside the cavity, the first end of the reset unit is connected with the slider, and moves towards the first end of the cavity under the action of the reset unit, when the reset unit moves towards the first end of the cavity, the second end of the locking member is separated from the first protrusion, the locking member rotates under the action of the first elastic member, the first end of the locking member is hooked in the recess of the valve core, and when the reset unit moves towards the second end of the cavity, the cavity is opened.

6. The freeze protection apparatus of claim 5, wherein The reset unit comprises a second elastic member, a third elastic member and a handle, one end of the handle is movably connected to the outer surface of the cavity, the other end of the handle extends into the cavity and is connected with the slider through the second elastic member, a containing cavity is arranged in the handle, the third elastic member is arranged in the containing cavity, and the two ends of the third elastic member respectively abut against the outer surface of the cavity and the bottom of the containing cavity.

7. The freeze protection apparatus of claim 1, wherein The first slide and the second slide are coaxially arranged in the cavity along the moving direction of the valve core, the second slide is arranged in the first slide, the valve core and the elastic element are located in the first slide, the slider and the locking member are located in the second slide, and the first protrusion is arranged on the inner wall of the second slide.

8. The freeze protection apparatus of claim 7, wherein the heating element is a heating cable. A third protrusion is arranged on the inner wall of the second slide, the third protrusion is arranged close to the first end of the cavity and is spaced apart from the first protrusion.

9. The freeze protection apparatus of claim 7, wherein the heating element is a heating cable. The first end of the valve core is provided with a mounting groove corresponding to the side of the inner wall of the first slide, and a sealing member is arranged in the mounting groove.

10. A water heater, characterized by The water heater comprises: a water heater body; The anti-freezing device according to any one of claims 1-9, wherein the water outlet of the anti-freezing device is connected with the water inlet of the water heater body.

Images