Internal leak pressure relief valve and water heater

Abstract

The utility model discloses an inner leak pressure reducing valve and water heater. Inner leak pressure reducing valve includes: valve shell, valve shell is provided with installation passageway, installation support is provided with installation pipe on installation support, still be provided with the through -hole on installation support, be provided with sealing washer on installation pipe, pressure reducing piston, the first end of pressure reducing piston forms first pressure -bearing end face, the second end of pressure reducing piston forms second pressure -bearing end face, and the area of first pressure -bearing end face is less than the area of second pressure -bearing end face, still be provided with water flow passageway in pressure reducing piston, reset spring, check valve, wherein, installation support fixedly arranged in installation passageway, check valve is arranged in installation pipe, pressure reducing piston is slidably arranged in installation passageway, first pressure -bearing end face is opposite arrangement with sealing washer, sealing washer is configured to seal water flow passageway, reset spring is arranged in valve shell and is configured to exert the elastic force of away from installation support to pressure reducing piston. Realize the reduction of the outward spillover water in the pressure relief process to improve user use experience.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, and in particular relates to an internal leakage pressure reducing valve and a water heater. Background Technology

[0002] Water heaters are currently common household appliances, categorized into gas water heaters, electric water heaters, heat pump water heaters, and solar water heaters. Their convenience has led to their widespread use. Water heaters can be further classified by heating capacity into storage water heaters and instantaneous water heaters. Storage water heaters, equipped with a water tank, offer advantages such as large water output and stable water temperature, making them more popular among families.

[0003] For conventional storage-type water heaters, there is usually a water tank to store water. During use, the water tank is heated by the heating element, and a certain amount of hot water is stored in the tank. As the water temperature in the tank rises, the water pressure in the tank increases. When the water pressure in the tank increases to a set pressure value, the safety valve connected to the tank will automatically open, allowing the water in the tank to flow out through the pressure relief valve to relieve pressure.

[0004] In actual use, the water heater's safety valve releases pressure, causing the leaked water to flow to the bottom, resulting in a poor user experience. Therefore, the technical problem this invention aims to solve is how to design a water heater that reduces outward leakage during pressure release to improve the user experience. Utility Model Content

[0005] This utility model provides an internal pressure relief valve and a water heater, which reduces water overflow during the pressure relief process to improve the user experience.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In one aspect, this utility model provides an internal leakage pressure reducing valve, comprising: Valve housing; A pressure-reducing piston, wherein a water flow channel is provided in the pressure-reducing piston, and the pressure-reducing piston is slidably disposed in the valve body; The mounting bracket has a mounting tube and a connecting hole, and a sealing gasket is provided on the mounting tube. The mounting bracket is fixedly installed in the valve body. The sealing gasket is configured to seal the edge of the water flow channel after contacting the pressure reducing piston. A return spring, which is disposed in the valve housing and configured to apply a spring force to the pressure-reducing piston away from the mounting bracket; A one-way valve is disposed in the mounting pipe.

[0007] Compared with the prior art, the advantages and positive effects of this utility model are as follows: By setting a pressure-reducing piston in the valve body, the pressure-reducing piston moves in the valve body to achieve the requirement of normal pressure reduction, and the mounting bracket set in the valve body can meet the installation requirements of the one-way valve. After the pressure in the water tank increases, the first end of the pressure-reducing piston abuts against the sealing gasket, and the water pressure in the water tank is transmitted to the one-way valve through the water flow channel. Under the action of water pressure, the one-way valve is opened, and the water in the water tank can be discharged in reverse from the one-way valve to the water supply network through the water flow channel. In this way, the situation of water leakage from the water tank to the outside due to the increase of pressure in the water tank is reduced, thereby improving the user experience.

[0008] In one embodiment of this application, when the internal leakage pressure reducing valve is in a pressure reducing state, a gap is formed between the pressure reducing piston and the sealing gasket; The internal pressure relief valve is configured to guide the input water through the connecting hole and output it via the water flow channel.

[0009] In one embodiment of this application, when the internal pressure relief valve is in a pressure relief state, the pressure relief piston is in contact with the sealing gasket; The internal pressure relief valve is configured to guide the input water through the water flow channel into the mounting pipe and out through the check valve.

[0010] In one embodiment of this application, the valve body is provided with an installation channel; The mounting bracket is fixedly disposed in the mounting channel, and the pressure reducing piston is slidably disposed in the mounting channel.

[0011] In one embodiment of this application, the first end of the pressure-reducing piston forms a first pressure-bearing end face, and the second end of the pressure-reducing piston forms a second pressure-bearing end face. The area of ​​the first pressure-bearing end face is smaller than the area of ​​the second pressure-bearing end face, and the first pressure-bearing end face is arranged opposite to the sealing gasket.

[0012] In one embodiment of this application, when the internal pressure relief valve is in a pressure relief state, a gap is formed between the first pressure-bearing end face and the sealing gasket. The internal pressure relief valve is configured to guide water input into the installation channel through the connecting hole and out of the installation channel via the water flow channel.

[0013] In one embodiment of this application, when the internal pressure relief valve is in a pressure relief state, the first pressure-bearing end face is in contact with the sealing gasket. The internal pressure relief valve is configured to guide water input into the installation channel through the water flow channel into the installation pipe and out of the installation channel through the one-way valve.

[0014] In one embodiment of this application, the first end of the pressure-reducing piston is slidably and sealingly disposed in the mounting tube, and the second end of the pressure-reducing piston is slidably and sealingly disposed in the valve body.

[0015] In one embodiment of this application, the outer peripheral wall of the pressure reducing piston is provided with a first annular groove and a second annular groove, a first sealing ring is provided in the first annular groove, and a second sealing ring is provided in the second annular groove; The first sealing ring is abutted against the inner wall of the mounting tube, and the second sealing ring is abutted against the inner wall of the valve body.

[0016] In one embodiment of this application, the mounting tube includes a first tube body and a second tube body, the first tube body and the second tube body are connected together by multiple connecting ribs, the outer circumferential dimension of the first tube body is smaller than the outer circumferential dimension of the second tube body, and two adjacent connecting ribs form the connecting hole between the first tube body and the second tube body.

[0017] In one embodiment of this application, the one-way valve is disposed in the first tube, the sealing gasket is disposed in the first tube, and the first end of the pressure reducing piston is slidably disposed in the second tube.

[0018] In one embodiment of this application, a third sealing ring is provided on the outer periphery of the second tube body, and the third sealing ring is pressed between the inner wall of the second tube body and the installation channel.

[0019] In one embodiment of this application, one end of the first tube is provided with an internal thread, and the other end of the second tube is provided with an inner flange. The one-way valve is threadedly connected in the first tube, and the sealing gasket is sandwiched between the one-way valve and the inner flange.

[0020] In one embodiment of this application, the valve housing includes a first valve cylinder and a second valve cylinder, the first valve cylinder is provided with an internal thread, the second valve cylinder is provided with an external thread, and the second valve cylinder is threadedly connected to the first valve cylinder. The mounting bracket is located in the first valve cylinder, and the pressure reducing piston is slidably disposed in the second valve cylinder.

[0021] In one embodiment of this application, the inner wall of the first valve cylinder is further provided with a positioning rib, and the mounting bracket is sandwiched between the positioning rib and the second valve cylinder; In one embodiment of this application, a limiting rib is provided at the end of the second valve cylinder away from the first valve cylinder, and the pressure-reducing piston is located inside the limiting rib. The limiting rib is configured to prevent the pressure-reducing piston from disengaging from the second valve cylinder.

[0022] In another aspect, this application also provides a water heater, including a water tank, the water tank being provided with an inlet pipe and an outlet pipe, and further including the aforementioned internal pressure relief valve; the valve body of the internal pressure relief valve is connected to the inlet pipe. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is one of the structural schematic diagrams of an embodiment of the internal leakage pressure reducing valve of this utility model; Figure 2 This is a second schematic diagram of the structure of an embodiment of the internal leakage pressure reducing valve of this utility model; Figure 3 This is an exploded view of an embodiment of the internal leakage pressure reducing valve of this utility model; Figure 4 This is one of the cross-sectional views of an embodiment of the internal leakage pressure reducing valve of this utility model; Figure 5 This is a second cross-sectional view of an embodiment of the internal leakage pressure reducing valve of this utility model; Figure 6 for Figure 3 A schematic diagram of the structure of the mounting bracket; Figure 7 for Figure 3 A schematic diagram of the structure of the medium-pressure reducing piston.

[0025] Explanation of reference numerals in the attached figures: 1. Valve housing; 11. Mounting channel; 12. First valve cylinder; 13. Second valve cylinder; 121. Positioning reinforcement; 131. Limiting reinforcement; 2. Mounting bracket; 21. Mounting tube; 22. Connecting hole; 23. Sealing gasket; 211. First pipe body; 212. Second pipe body; 213. Connecting rib; 214. Third sealing ring; 215. Inner flange; 3. Pressure-reducing piston; 31. First pressure-bearing end face; 32. Second pressure-bearing end face; 33. First sealing ring; 34. Second sealing ring; 35. Water flow channel; 4. Return spring; 5. Check valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0031] A water heater is a type of water heater that uses electricity as its primary energy source. The high-temperature heat generated after the power is turned on directly heats the water stored in the water heater to produce hot water.

[0032] A water heater typically consists of a water tank, an electric heating element, and an electronic control board. The water tank has a storage cavity to store water to be heated. The electric heating element is inserted into the storage cavity of the water tank. The electronic control board is used to control the electric heating element to turn on and off so that the water in the tank is heated to the set temperature.

[0033] For water heater tanks, the tank generally consists of an outer shell and an inner tank, with an insulation layer between them. The outer shell is usually made of plastic to meet the requirements of aesthetic and diverse designs; the inner tank can be made of metal or plastic, depending on the needs.

[0034] In addition, the insulation layer formed between the outer shell and the inner liner is commonly made of materials such as asbestos, sponge, foam plastic, and polyurethane foam. In conventional technology, foaming is usually used to form the insulation layer in order to achieve good insulation effect.

[0035] For water tanks with metal inner liner, corrosion can easily occur inside due to water quality. Therefore, magnesium rods are installed on the water tank and inserted into the water storage cavity inside the tank.

[0036] Magnesium has the lowest electrochemical potential among metals and is physiologically non-toxic. Therefore, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod directly affects the duration and effectiveness of the protection; the larger the magnesium rod, the better the protection and the longer the protection time.

[0037] The water tank is also equipped with an inlet pipe and an outlet pipe. The inlet pipe is used to deliver cold water into the water storage cavity formed inside the water tank, while the hot water in the water storage cavity is output from the outlet pipe.

[0038] For electric heating components, electric heating methods such as electric heating wires, magnetic energy, or silicon tube heating can be used to heat the water stored in the water storage chamber.

[0039] The control board is used to receive detection signals from relevant sensors (such as water temperature sensors and flow sensors) and control the power supply to and from the electric heating components.

[0040] When the water heater is working, the electric control board controls the electric heating element to be powered on and heated. When the water temperature in the tank reaches the set value, the electric control board controls the electric heating element to be powered off.

[0041] like Figures 1-7 As shown, this embodiment provides an internal leakage pressure reducing valve, including: Valve housing 1; Mounting bracket 2, which is provided with mounting tube 21 and connecting hole 22, and sealing gasket 23 is provided on mounting tube 21; the mounting bracket 2 is disposed in valve body 1; Pressure reducing piston 3, which is also provided with water flow channel 35; pressure reducing piston 3 is slidably disposed in valve housing 1; A return spring 4 is disposed in the valve housing 1 and configured to apply a spring force to the pressure reducing piston 3 away from the mounting bracket 2; One-way valve 5 is disposed in the mounting pipe 21.

[0042] Specifically, the internal leakage pressure reducing valve uses the valve body 1 as the main installation structure to install related components. In order to meet the pressure reduction requirements, the valve body 1 is equipped with a pressure reducing piston 3 and a return spring 4. The pressure reducing piston 3 can slide relative to the mounting bracket 2 in the valve body 1 to move closer to or away from the sealing gasket 23, thereby achieving the pressure reduction function.

[0043] After the water in the tank is heated, the pressure inside the tank will increase. In order to relieve the pressure in the tank, the water in the tank will flow out of the inlet pipe in reverse. The water flowing out of the tank will flow back into the installation channel 11 and then through the water flow channel 35 of the pressure reducing piston 3 to the installation pipe 21 on the installation bracket 2.

[0044] Because the water pressure in the water tank is greater than the water pressure in the external water supply network, after the water in the water tank enters the installation pipe 21 through the water flow channel 35, the one-way valve 5 in the installation pipe 21 will be opened under the action of the internal and external pressure difference, so that the water in the water tank is output from the one-way valve 5 and flows back from the installation channel 11 to the water supply network.

[0045] In this way, during actual use, when the water pressure in the tank increases and pressure needs to be released, the water in the tank will open the one-way valve 5 to achieve internal leakage. This solves the problem of water leakage that occurs when the conventional technology releases pressure and drains water directly to the outside of the tank through the safety valve, resulting in water flowing onto the floor of the user's home, thus improving the user experience.

[0046] In one embodiment, the valve housing 1 is provided with an installation channel 11, and the installation bracket 2 is fixedly disposed in the installation channel 11; the first end of the pressure reducing piston 3 forms a first pressure-bearing end face 31, and the second end of the pressure reducing piston 3 forms a second pressure-bearing end face 32. The area of ​​the first pressure-bearing end face 31 is smaller than the area of ​​the second pressure-bearing end face 32. The pressure reducing piston 3 is slidably disposed in the installation channel 11. The first pressure-bearing end face 31 is arranged opposite to the sealing gasket 23, and the sealing gasket 23 is configured to seal the water flow channel 35.

[0047] The two ends of the pressure-reducing piston 3 have different areas. In this way, when the external water supply pressure is high, the pressure is reduced by utilizing the area difference between the first pressure-bearing end face 31 and the second pressure-bearing end face 32, so as to protect the inner tank of the water tank.

[0048] For the internal leakage pressure reducing valve, during assembly, the one-way valve 5 is sealed and installed into the mounting pipe 21 of the mounting bracket 2, ensuring that the flow direction of the one-way valve 5 is aligned with the axis of the mounting pipe 21; the sealing gasket 23 is installed into the mounting pipe 21, and the sealing gasket 23 is arranged around the inlet of the one-way valve 5. In this way, after the first pressure-bearing end face 31 of the pressure reducing piston 3 abuts against the sealing gasket 23 to achieve a seal, the water flow channel 35 of the pressure reducing piston 3 can seal and connect to the inlet of the one-way valve 5. The mounting bracket 2, with the one-way valve 5 and sealing gasket 23 assembled, is sealed and installed into the mounting channel 11 of the valve body 1; the pressure reducing piston 3 and the return spring 4 are placed into the mounting channel 11 of the valve body 1, and the return spring 4 is pressed between the pressure reducing piston 3 and the valve body 1, with the water flow channel 35 extending in a straight line with the mounting pipe 21.

[0049] Compared with the prior art, the advantages and positive effects of this utility model are as follows: By setting a pressure-reducing piston 3 in the valve body 1, the pressure-reducing piston 3 utilizes the area difference of the two pressure-bearing end faces to achieve the normal pressure reduction requirement. The mounting bracket 2 set in the valve body 1 can meet the installation requirements of the one-way valve 5. After the pressure in the water tank increases, the first end of the pressure-reducing piston 3 abuts against the sealing gasket 23. The water pressure in the water tank is transmitted to the one-way valve 5 through the water flow channel 35. Under the action of the water pressure, the one-way valve 5 is opened, and the water in the water tank can be discharged in reverse from the one-way valve 5 through the water flow channel 35 to the water supply network. In this way, the situation of water leakage from the water tank to the outside due to the increase of the pressure in the water tank is reduced, thereby improving the user experience.

[0050] In one embodiment of this application, as Figure 5 As shown, when the internal pressure relief valve is in the pressure relief state, a gap is formed between the first pressure-bearing end face 31 and the sealing gasket 23; The internal pressure relief valve is configured to guide water input into the mounting channel 11 through the connecting hole 22 and out of the mounting channel 11 via the water flow channel 35.

[0051] Specifically, the internal pressure-reducing valve is installed in the inlet pipe of the water heater. Cold water is supplied to the water heater's inlet pipe via the internal pressure-reducing valve and then enters the water tank. During the process of supplying water to the water tank, the water pressure in the supply pipe is greater than the water pressure in the water tank. The water in the supply pipe flows into the installation channel 11 and through the connecting hole 22 to the first pressure-bearing end face 31 of the pressure-reducing piston 3. Under the pressure of the water supplied by the supply pipe, and with the elastic force of the return spring 4, the pressure-reducing piston 3 moves away from the sealing gasket 23 to open the water flow channel 35. The water supplied by the supply pipe then enters the water tank through the water flow channel 35. During the water supply process, due to the different areas of the first pressure-bearing end face 31 and the second pressure-bearing end face 32 of the pressure-reducing piston 3, the water pressure in the water tank can be lower than the water pressure in the supply pipe.

[0052] When the pressure exerted by the water pressure in the water tank on the second pressure-bearing end face 32 is greater than the sum of the elastic force of the return spring 4 and the pressure of the first pressure-bearing end face 31, the pressure-reducing piston 3 will move toward the sealing gasket 23. Finally, the first end of the pressure-reducing piston 3 will abut against the sealing gasket 23, so that the water flow channel 35 is sealed and connected to the inlet of the one-way valve 5.

[0053] In one embodiment of this application, as Figure 4 As shown, when the internal pressure relief valve is in the pressure relief state, the first pressure-bearing end face 31 is in contact with the sealing gasket 23; The internal pressure relief valve is configured to guide water input into the installation channel 11 through the water flow channel 35 into the installation pipe 21 and out of the installation channel 11 through the one-way valve 5.

[0054] Specifically, when the water pressure in the tank is too high and needs to be released, the pressure exerted by the water pressure in the tank on the second pressure-bearing end face 32 is greater than the sum of the elastic force of the return spring 4 and the pressure on the first pressure-bearing end face 31, causing the pressure-reducing piston 3 to abut against the sealing gasket 23. The water in the tank applies pressure to the one-way valve 5 through the water flow channel 35 to open the one-way valve 5, allowing the water in the tank to flow back from the valve body 1 into the water supply pipeline via the one-way valve 5.

[0055] In one embodiment of this application, the first end of the pressure reducing piston 3 is slidably and sealingly disposed in the mounting tube 21, and the second end of the pressure reducing piston 3 is slidably and sealingly disposed in the mounting channel 11.

[0056] Specifically, since the two ends of the pressure reducing piston 3 have different dimensions, in order to ensure that the pressure reducing piston 3 can slide smoothly, the installation tube 21 is used to meet the requirements for sliding sealing support installation of the first end of the pressure reducing piston 3, and the installation channel 11 is used to meet the requirements for sliding sealing support installation of the second end of the pressure reducing piston 3.

[0057] The outer peripheral wall of the pressure reducing piston 3 is provided with a first annular groove (unmarked) and a second annular groove (unmarked). A first sealing ring 33 is provided in the first annular groove, and a second sealing ring 34 is provided in the second annular groove. The first sealing ring 33 is abutted against the inner wall of the mounting tube 21, and the second sealing ring 34 is abutted against the inner wall of the mounting channel 11.

[0058] Specifically, the first end of the pressure reducing piston 3 is sealed and slidably disposed in the mounting tube 21 through the first sealing ring 33, and the second end of the pressure reducing piston 3 is sealed and slidably disposed in the mounting channel 11 through the second sealing ring 34.

[0059] In one embodiment, the mounting tube 21 includes a first tube body 211 and a second tube body 212. The first tube body 211 and the second tube body 212 are connected together by a plurality of connecting ribs 213. The outer circumferential dimension of the first tube body 211 is smaller than the outer circumferential dimension of the second tube body 212. Two adjacent connecting ribs 213 form the connecting hole between the first tube body 211 and the second tube body 212. The one-way valve 5 is disposed in the first tube 211, the sealing gasket 23 is disposed in the first tube 211, and the first end of the pressure reducing piston 3 is slidably disposed in the second tube 212.

[0060] Specifically, the installation tube 21 adopts a split structure. The first tube body 211 and the second tube body 212 are connected together by the connecting rib 213. The first tube body 211 is used to install the one-way valve 5 and the sealing gasket 23, and the second tube body 212 is used to support the first end of the pressure reducing piston 3.

[0061] Both the one-way valve 5 and the sealing gasket 23 are located in the first tube body 211. The smaller outer circumference of the first tube body 211 can be precisely matched with the one-way valve 5 and the sealing gasket 23, ensuring improved installation reliability of the one-way valve 5 and the sealing gasket 23.

[0062] The first end of the pressure reducing piston 3 is slidably and sealed in the second tube 212. The larger outer circumferential size of the second tube 212 provides more radial support space for the first end of the pressure reducing piston 3, preventing the pressure reducing piston 3 from radially shifting under pressure, ensuring that the sealing fit between the pressure reducing piston 3 and the second tube 212 is always stable, and further blocking water leakage from the gap between the pressure reducing piston 3 and the second tube 212.

[0063] The fixed position of the sealing gasket 23 in the first tube 211, in conjunction with the guiding action of the piston in the second tube 212, ensures that the sealing gasket 23 can tightly cover the port of the water flow channel 35 of the pressure-reducing piston 3 to achieve a complete seal. The second tube 212 provides a stable sliding guide for the first end of the pressure-reducing piston 3, ensuring that the piston moves accurately along the axis of the tube and preventing the first pressure-bearing end face 31 of the piston from failing to accurately fit with the sealing gasket 23 in the first tube 211 due to misalignment.

[0064] The segmented design of the first tube 211 and the second tube 212 can be adapted to the one-way valve 5 (small size) and the end of the pressure reducing piston 3 (large size) respectively, eliminating the need to design tubes of uniform specifications to be compatible with components of different sizes and improving assembly accuracy.

[0065] In one embodiment, a third sealing ring 214 is provided on the outer periphery of the second tube 212, and the third sealing ring 214 is pressed between the second tube 212 and the inner wall of the mounting channel 11.

[0066] Specifically, the third sealing ring 214 enables the second pipe body 212 to be sealed and assembled into the valve body 1, so as to meet the sealing installation requirements of the mounting bracket 2.

[0067] In one embodiment, one end of the first tube 211 is provided with an internal thread, and the other end of the second tube 212 is provided with an inner flange 215. The one-way valve 5 is threadedly connected in the first tube 211, and the sealing gasket 23 is sandwiched between the one-way valve 5 and the inner flange 215.

[0068] Specifically, in order to facilitate the assembly of the one-way valve 5 and the sealing gasket 23, the inner flange 215 in the first pipe body 211 is used to position and support the sealing gasket 23. After the one-way valve 5 is threaded into the first pipe body 211, the end face of the one-way valve 5 with the water inlet abuts against the sealing gasket 23 and presses the sealing gasket 23 onto the inner flange 215.

[0069] In one embodiment of this application, the valve housing 1 includes a first valve cylinder 12 and a second valve cylinder 13. The first valve cylinder 12 is provided with an internal thread, and the second valve cylinder 13 is provided with an external thread. The second valve cylinder 13 is threadedly connected to the first valve cylinder 12. The mounting bracket 2 is located in the first valve cylinder 12, and the pressure reducing piston 3 is slidably disposed in the second valve cylinder 13.

[0070] Specifically, in order to facilitate the assembly of the mounting bracket 2 and the pressure reducing piston 3, the valve body 1 adopts a split structure. The first valve cylinder 12 and the second valve cylinder 13 are connected by threads. During the assembly process, after the one-way valve 5 and the mounting bracket 2 are assembled, they are installed into the first valve cylinder 12. The pressure reducing piston 3 is installed into the mounting tube 21 and the return spring 4 is put on the outside. Then, the second valve cylinder 13 is put on the outside of the pressure reducing piston 3 and threadedly connected to the first valve cylinder 12 to complete the assembly.

[0071] In one embodiment, the inner wall of the first valve cylinder 12 is further provided with a positioning rib 121, and the mounting bracket 2 is sandwiched between the positioning rib 121 and the second valve cylinder 13.

[0072] Specifically, the positioning rib 121 can position the mounting bracket 2 so that the mounting bracket 2 can be accurately assembled into the first valve cylinder 12.

[0073] In one embodiment, a limiting rib 131 is provided at the end of the second valve cylinder 13 away from the first valve cylinder 12, and the pressure reducing piston 3 is located inside the limiting rib 131. The limiting rib 131 is configured to prevent the pressure reducing piston 3 from disengaging from the second valve cylinder 13.

[0074] Specifically, the limiting rib 131 can limit the movement stroke of the pressure reducing piston 3, preventing the pressure reducing piston 3 from being pushed out of the second valve cylinder 13 when the water pressure in the water supply pipeline is too high.

[0075] In another embodiment of this application, a water heater is also provided, including a water tank, the water tank being provided with an inlet pipe and an outlet pipe, and also including the internal pressure reducing valve in the above embodiment; The valve body 1 of the internal pressure relief valve is connected to the water inlet pipe.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. An internal leakage pressure reducing valve, characterized in that, include: Valve housing; A pressure-reducing piston, wherein a water flow channel is provided in the pressure-reducing piston, and the pressure-reducing piston is slidably disposed in the valve body; The mounting bracket has a mounting tube and a connecting hole, and a sealing gasket is provided on the mounting tube. The mounting bracket is fixedly installed in the valve body. The sealing gasket is configured to seal the edge of the water flow channel after contacting the pressure reducing piston. A return spring, which is disposed in the valve housing and configured to apply a spring force to the pressure reducing piston away from the mounting bracket; A one-way valve is disposed in the mounting pipe.

2. The internal leakage pressure reducing valve according to claim 1, characterized in that, When the internal pressure relief valve is in the pressure relief state, a gap is formed between the pressure relief piston and the sealing gasket; The internal pressure relief valve is configured to guide the input water through the connecting hole and output it via the water flow channel.

3. The internal leakage pressure reducing valve according to claim 1, characterized in that, When the internal pressure relief valve is in the pressure relief state, the pressure relief piston is in contact with the sealing gasket; The internal pressure relief valve is configured to guide the input water through the water flow channel into the mounting pipe and out through the check valve.

4. The internal leakage pressure reducing valve according to claim 1, characterized in that, The valve body is provided with an installation channel; The mounting bracket is fixedly disposed in the mounting channel, and the pressure reducing piston is slidably disposed in the mounting channel.

5. The internal leakage pressure reducing valve according to claim 4, characterized in that, The first end of the pressure-reducing piston forms a first pressure-bearing end face, and the second end of the pressure-reducing piston forms a second pressure-bearing end face. The area of ​​the first pressure-bearing end face is smaller than the area of ​​the second pressure-bearing end face, and the first pressure-bearing end face is arranged opposite to the sealing gasket.

6. The internal leakage pressure reducing valve according to claim 5, characterized in that, When the internal pressure relief valve is in the pressure relief state, a gap is formed between the first pressure-bearing end face and the sealing gasket. The internal pressure relief valve is configured to guide water input into the installation channel through the connecting hole and out of the installation channel via the water flow channel.

7. The internal leakage pressure reducing valve according to claim 5, characterized in that, When the internal pressure relief valve is in the pressure relief state, the first pressure-bearing end face is in contact with the sealing gasket. The internal pressure relief valve is configured to guide water input into the installation channel through the water flow channel into the installation pipe and out of the installation channel through the check valve.

8. The internal leakage pressure reducing valve according to any one of claims 1-7, characterized in that, The first end of the pressure-reducing piston is slidably and sealed in the mounting tube, and the second end of the pressure-reducing piston is slidably and sealed in the valve body.

9. The internal leakage pressure reducing valve according to claim 8, characterized in that, The outer peripheral wall of the pressure reducing piston is provided with a first annular groove and a second annular groove, a first sealing ring is provided in the first annular groove, and a second sealing ring is provided in the second annular groove. The first sealing ring is abutted against the inner wall of the mounting tube, and the second sealing ring is abutted against the inner wall of the valve body.

10. The internal leakage pressure reducing valve according to claim 8, characterized in that, The mounting tube includes a first tube body and a second tube body, which are connected together by multiple connecting ribs. The outer circumferential dimension of the first tube body is smaller than that of the second tube body, and two adjacent connecting ribs form the connecting hole between the first tube body and the second tube body.

11. The internal leakage pressure reducing valve according to claim 10, characterized in that, The one-way valve is disposed in the first tube, the sealing gasket is disposed in the first tube, and the first end of the pressure reducing piston is slidably disposed in the second tube.

12. The internal leakage pressure reducing valve according to claim 11, characterized in that, One end of the first tube is provided with an internal thread, and the other end of the second tube is provided with an inner flange. The one-way valve is threadedly connected in the first tube, and the sealing gasket is sandwiched between the one-way valve and the inner flange.

13. The internal leakage pressure reducing valve according to claim 10, characterized in that, A third sealing ring is provided on the outer circumference of the second tube, and the third sealing ring is pressed between the inner wall of the second tube and the installation channel.

14. The internal leakage pressure reducing valve according to any one of claims 1-7, characterized in that, The valve body includes a first valve cylinder and a second valve cylinder. The first valve cylinder is provided with an internal thread, and the second valve cylinder is provided with an external thread. The second valve cylinder is threadedly connected to the first valve cylinder.

15. The internal leakage pressure reducing valve according to claim 14, characterized in that, The mounting bracket is located in the first valve cylinder, and the pressure reducing piston is slidably disposed in the second valve cylinder.

16. The internal leakage pressure reducing valve according to claim 14, characterized in that, The inner wall of the first valve cylinder is also provided with a positioning rib, and the mounting bracket is clamped between the positioning rib and the second valve cylinder.

17. The internal leakage pressure reducing valve according to claim 14, characterized in that, The second valve cylinder has a limiting rib at its end away from the first valve cylinder, and the pressure reducing piston is located inside the limiting rib. The limiting rib is configured to prevent the pressure reducing piston from disengaging from the second valve cylinder.

18. A water heater, comprising a water tank, the water tank being provided with an inlet pipe and an outlet pipe, characterized in that, It also includes the internal leakage pressure reducing valve as described in any one of claims 1-17; The valve body of the internal pressure relief valve is connected to the water inlet pipe.

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