Safety valve, electric wall and water heater

Abstract

The application relates to the technical field of valves, and particularly discloses a safety valve, an anti-electricity wall and a water heater. The safety valve comprises a valve body and an inner leakage valve core. The valve body is provided with a valve main body, a water inlet end connector and a water outlet end connector. The valve main body is connected with the water inlet end connector and the water outlet end connector respectively. The water outlet end connector is provided with external threads. The inner leakage valve core is arranged in the valve main body and is used for controlling the water outlet end connector and the water inlet end connector to be connected or separated. According to the safety valve, the water outlet end connector is provided with external threads, so that the structural strength and stability of the safety valve during installation and use can be improved, and the reliability of the safety valve is improved.

Description

Technical Field

[0001] This invention relates to the field of valve body technology, and in particular to a safety valve, an anti-electric shock wall, and a water heater. Background Technology

[0002] Safety valves are critical safety protection devices in electric water heaters, preventing damage or accidents caused by excessive internal pressure or temperature. In related technologies, the safety valve is connected to the anti-electric shock wall with an internal thread structure, while the anti-electric shock wall has an external thread structure. When the safety valve is connected to the anti-electric shock wall, it needs to withstand pressure from the inside out. Improper installation or prolonged use can easily affect the performance of the safety valve, posing safety hazards to the equipment. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, one object of this invention is to provide a safety valve that improves the reliability of the safety valve.

[0004] Another objective of this invention is to provide an anti-electric shock wall.

[0005] Another object of the present invention is to provide a water heater.

[0006] According to an embodiment of the present invention, a safety valve includes: a valve body and an internal leakage valve core. The valve body has a valve main body, an inlet connector, and an outlet connector. The valve main body is connected to the inlet connector and the outlet connector respectively. The outlet connector has an external thread. The internal leakage valve core is disposed on the valve main body and is used to control the connection and disconnection of the outlet connector and the inlet connector.

[0007] According to an embodiment of the present invention, the outlet connector of the safety valve has an external thread, which can improve the structural strength and stability of the safety valve during installation and use, thereby improving the reliability of the safety valve.

[0008] In addition, the safety valve according to the above embodiments of the present invention may also have the following additional technical features:

[0009] In some embodiments, the outlet connector has a first plastic inner layer.

[0010] In some embodiments, the water outlet connector further includes a first plastic outer layer, which surrounds the first plastic inner layer, and the outer peripheral surface of the first plastic outer layer is provided with the external thread. The first plastic outer layer and the first plastic inner layer are integrally formed plastic parts.

[0011] In some embodiments, the outlet connector further has a metal layer surrounding the outer side of the first plastic inner layer, and the outer peripheral surface of the metal layer forms the external thread.

[0012] In some embodiments, the metal layer includes a sleeve portion and a fixing portion, the sleeve portion being stacked and connected to the outer side of the first plastic inner layer, the valve body including a second plastic inner layer and a second plastic outer layer, the inner side of the second plastic inner layer communicating with the inner side of the first plastic inner layer, and the fixing portion being positioned between the second plastic inner layer and the second plastic outer layer.

[0013] In some embodiments, the valve body is made of plastic.

[0014] In some embodiments, the safety valve further includes a limiting member disposed within the inlet connector, the limiting member having an internal vent, and the internal vent valve core being configured to open and close the internal vent.

[0015] In some embodiments, the internal leakage valve core includes:

[0016] A valve seat, wherein the valve seat is provided with a pressure relief hole, the pressure relief hole being opposite to the inner vent.

[0017] A valve core, movable along the axis of the pressure relief orifice to open and close the pressure relief orifice;

[0018] A first reset element has an elastic force that drives the valve core to close the pressure relief hole;

[0019] The second reset member has an elastic force that drives the valve seat to abut against the limiting member.

[0020] In some embodiments, the valve body is provided with a limiting flange, the limiting flange is distributed opposite to the limiting member, the limiting flange is closer to the water outlet connector relative to the limiting member, and the second reset member elastically abuts between the limiting flange and the valve seat.

[0021] In some embodiments, the internal leakage valve core further includes a filter element that abuts against the limiting flange, and the second reset element elastically abuts between the filter element and the valve seat.

[0022] In some embodiments, the wall thickness of the valve body is d1, and the wall thickness of the outlet connector is d2, wherein d1 / d2≥1.5;

[0023] And / or, the wall thickness of the valve body is d1, and the wall thickness of the inlet connector is d3, wherein d1 / d3≥1.5.

[0024] In some embodiments, the axial length of the valve body is L0, and the axial length of the outlet connector is L1, wherein L1 / L0≤1;

[0025] And / or, the axial length dimension L0 of the valve body and the axial length dimension L2 of the inlet connector, wherein L2 / L0≤1.

[0026] In some embodiments, the water inlet connector has external threads.

[0027] Wherein, the outer circumferential surfaces of the water outlet connector and the water inlet connector have the same diameter;

[0028] And / or, the outer peripheral wall of the valve body has a polygonal cylindrical surface, one end of the valve body extends to the external thread of the outlet connector, and the other end extends to the external thread of the inlet connector.

[0029] In some embodiments, the valve body has an inner cavity, an outer cavity, and an external vent, the external vent communicating with the inner cavity and the outer cavity. An internal vent valve core is disposed within the inner cavity. The safety valve further includes an external vent valve core, which is used to open and close the external vent to control the connection between the inner cavity and the outer cavity. The periphery of the external vent has a third plastic inner layer.

[0030] The third plastic inner layer has a first annular rib, which surrounds the external vent and abuts against the external vent valve core when the external vent valve core closes the external vent.

[0031] And / or, the external leakage valve core has a mating portion for sealing and opening the external leakage port, the mating portion having a second annular rib, the second annular rib abutting against the third plastic inner layer when the mating portion seals the external leakage port.

[0032] According to an embodiment of the present invention, the anti-electric wall has a flow channel and a valve interface communicating with the flow channel. The valve interface has an internal thread on its inner side, which is used to engage with the external thread of the outlet interface of the safety valve according to any one of claims 1-10.

[0033] In some embodiments, the anti-electric shock wall includes a main body and an insert, the flow channel and the valve interface are disposed in the main body, the insert is disposed in the valve interface, and the internal thread is disposed on the inner circumferential surface of the insert.

[0034] In some embodiments, a third annular rib is provided on the inner side of the valve interface, and an annular groove is provided between the inner circumferential surface of the valve interface and the third annular rib, with the end periphery of the insert extending into the annular groove.

[0035] A water heater according to an embodiment of the present invention includes: an inner tank, the aforementioned safety valve and the aforementioned anti-electric shock wall, wherein the inner tank has a water storage cavity; the flow channel communicates with the water storage cavity, and the valve interface is threadedly engaged with the external thread of the outlet interface of the safety valve.

[0036] In some embodiments, a sealing ring is also included, which is disposed at the valve interface and abuts against the end of the outlet connector. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a safety valve according to an embodiment of the present invention.

[0038] Figure 2 This is a cross-sectional schematic diagram of the safety valve according to an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of a safety valve according to some embodiments of the present invention.

[0040] Figure 4 This is a partial cross-sectional schematic diagram of the safety valve according to an embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of a safety valve according to some embodiments of the present invention.

[0042] Figure 6 This is a cross-sectional schematic diagram of a safety valve according to some embodiments of the present invention.

[0043] Figure 7 This is a partial schematic diagram of a water heater according to an embodiment of the present invention.

[0044] Figure 8 This is a partial explosion diagram of a water heater according to an embodiment of the present invention.

[0045] Figure 9 This is a partial cross-sectional schematic diagram of a water heater according to an embodiment of the present invention.

[0046] Figure 10 This is a cross-sectional schematic diagram of a safety valve in related technologies.

[0047] Figure label:

[0048] Safety valve 100, valve body 10, valve main body 11, limiting flange 111, second plastic inner layer 112, second plastic outer layer 113, inlet connector 12, outlet connector 13, first plastic inner layer 131, metal layer 132, sleeve part 1321, fixing part 1322, inner cavity 141, outer cavity 142, external vent 143, first annular rib 15, internal vent valve core 20, valve seat 21, pressure relief hole 211, valve core 22, first reset part 23, second reset part 24, filter part 25, limiting part 30, internal vent 31, external vent valve core 40, mating part 41, second annular rib 411, anti-electric wall 200, flow channel 210, valve interface 220, third annular rib 221, main body part 230, insert 240, sealing ring 300. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0050] Safety valves are critical safety protection devices in devices such as electric water heaters. During system heating, the internal pressure increases. When the system pressure exceeds a set value, the safety valve opens its internal relief channel to release pressure. In related technologies, the safety valve is connected to the anti-electric shock wall with an internal thread structure, while the anti-electric shock wall's connector has an external thread structure. When the safety valve is connected to the anti-electric shock wall, it needs to withstand pressure from the inside out. Improper installation or prolonged use can easily affect the safety valve's performance, posing a safety hazard to the equipment. Therefore, this invention proposes a safety valve that improves its structural strength and stability by modifying the valve body structure.

[0051] Combination Figures 1 to 6 According to an embodiment of the present invention, the safety valve 100 includes a valve body 10 and an internal leakage valve core 20. The valve body 10 has a valve main body 11, an inlet connector 12 and an outlet connector 13. The valve main body 11 is connected to the inlet connector 12 and the outlet connector 13 respectively. The internal leakage valve core 20 is disposed on the valve main body 11 and is used to control the connection and disconnection of the outlet connector 13 and the inlet connector 12.

[0052] For example, the safety valve 100 can be used in an electric water heater. The inlet connector 12 can be connected to the cold water inlet pipe, and the outlet connector can be connected to the inner tank of the electric water heater. When water enters the inner tank, the internal relief valve core 20 controls the inlet connector 12 and the outlet connector 13 to connect. Water in the cold water inlet pipe can enter the inner tank of the water heater through the safety valve 100. During the heating process of the water heater, the internal pressure and temperature of the inner tank increase. When the pressure of the inner tank exceeds the safety threshold, the internal relief valve core 20 controls the outlet connector 13 and the inlet connector 12 to connect, so as to realize the automatic pressure relief of the inner tank.

[0053] Combination Figure 1 and Figure 2 The outlet connector 13 has an external thread. For example, the outlet connector 13 can be connected to the inner tank of the electric water heater via the anti-electric shock wall 200. That is, the safety valve 100 can be connected to the anti-electric shock wall 200. The external thread on the outlet connector 13 reduces the risk of cracking or deformation when it connects to the anti-electric shock wall 200. Specifically, the anti-electric shock wall 200 has a valve interface 220 that connects to the outlet connector 13. The inner side of the valve interface 220 may have an internal thread, which engages with the external thread of the outlet connector 13. When the safety valve 100 connects to the anti-electric shock wall 200, the outlet connector 13 is subjected to pressure, thus reducing the likelihood of cracking or deformation. Furthermore, after the safety valve 100 connects to the anti-electric shock wall 200, the anti-electric shock wall 200 can protect the outlet connector 13, improving the structural strength and stability of the safety valve 100.

[0054] According to an embodiment of the present invention, the safety valve 100 has an external thread at the outlet end connector 13, which can improve the structural strength and stability of the safety valve 100 during installation and use, thereby improving the reliability of the safety valve 100.

[0055] Combination Figure 3 In some embodiments of the present invention, the outlet connector 13 has a first plastic inner layer 131. It is understood that the outlet connector 13 is subject to long-term water flow and is in a high-temperature and high-pressure environment when the pressure in the inner tank reaches the internal leakage value. In related technologies, the valve body 10 is usually made of copper, which has low hardness. Long-term fluid flushing can easily cause wear and corrosion to the outlet connector. By providing the first plastic inner layer 131 to the outlet connector 13, the wear and corrosion of the outlet connector 13 caused by long-term fluid flushing can be reduced, the stability of the outlet connector 13 can be improved, and thus the reliability of the safety valve 100 can be improved.

[0056] The outlet connector 13 of the safety valve 100 in this embodiment includes, but is not limited to, the following implementations:

[0057] Example 1

[0058] The water outlet connector 13 may also include a first plastic outer layer, which surrounds the first plastic inner layer 131, and the outer peripheral surface of the first plastic outer layer is provided with external threads. By setting two plastic structures in the water outlet connector 13, the structural strength and stability of the water outlet connector 13 can be improved, so that the water outlet connector 13 can be stably connected with the anti-electric wall 200, and the risk of damage when the water outlet connector 13 is connected with the anti-electric wall 200 can be reduced.

[0059] The first plastic outer layer and the first plastic inner layer 131 are integrally molded plastic parts, which improves the structural strength and production efficiency of the safety valve 100.

[0060] For example, the first plastic inner layer 131 can be PPS material, which gives the inner side of the water outlet connector 13 good stability and corrosion resistance, and avoids the impact of long-term fluid flushing. The first plastic outer layer can be PPS composite material, for example, glass fiber can be added to PPS material, which can improve the structural strength and toughness of the water outlet connector 13, and facilitate the stable connection between the water outlet connector 13 and the anti-electric wall 200.

[0061] In some embodiments of the present invention, the valve body 10 can be a one-piece injection molded structure, that is, the first plastic outer layer, the first plastic inner layer 131, the valve body 11, and the water inlet connector 12 are integrally injection molded to improve the structural strength and production efficiency of the safety valve 100.

[0062] Example 2

[0063] Combination Figure 3 The outlet connector 13 may also have a metal layer 132, which surrounds the outer side of the first plastic inner layer 131, and the outer peripheral surface of the metal layer 132 forms an external thread. By providing a metal layer 132 on the outer side of the first plastic inner layer 131, the overall structural strength of the outlet connector 13 can be improved. Specifically, when the outlet connector 13 is connected to the anti-electric wall 200, the metal layer 132 protects the first plastic inner layer 131, so that the outlet connector 13 remains stable under pressure, thereby improving the reliability and stability of the connection between the outlet connector 13 and the anti-electric wall 200.

[0064] Combination Figure 4Furthermore, the metal layer 132 includes a sleeve portion 1321 and a fixing portion 1322. The sleeve portion 1321 is stacked and connected to the outer side of the first plastic inner layer 131. The valve body 11 includes a second plastic inner layer 112 and a second plastic outer layer 113. The second plastic inner layer 112 communicates with the inner side of the first plastic inner layer 131. The fixing portion 1322 is disposed between the second plastic inner layer 112 and the second plastic outer layer 113. By providing the fixing portion 1322, the connection strength and stability between the metal layer 132 and the first plastic inner layer 131 can be improved, and when the water outlet connector 13 is connected to the anti-electric wall 200, it can further ensure that the water outlet connector 13 and the anti-electric wall 200 can be stably connected.

[0065] The sleeve portion 1321 and the first plastic inner layer 131 are radially stacked and connected, which improves the connection stability between the metal layer 132 and the first plastic inner layer 131.

[0066] Furthermore, the inner sides of the first plastic inner layer 131 and the second plastic inner layer 112 are connected. For example, the first plastic inner layer 131, the second plastic inner layer 112, and the second plastic outer layer 113 can be integrally formed by injection molding, and can be integrally formed with the metal layer 132 through an insert injection molding process. For instance, the metal layer 132 can be placed in a predetermined position in the mold, and molten plastic can be injected to integrally form the plastic and metal layer 132, thereby improving the structural strength and production efficiency of the valve body 10 and reducing the production cost of the valve body 10.

[0067] In some embodiments of the present invention, at least a portion of the valve body 10 may be made of plastic. For example, except for the metal layer 132, the other portions are made of plastic. Compared with the metal valve body in the related art, this can reduce the production cost of the safety valve 100 and reduce the wear and corrosion of the valve body 10 caused by long-term fluid scouring, thereby improving the reliability of the safety valve 100.

[0068] The plastic material can be PPS composite material. Specifically, glass fiber can be added to the PPS material to improve the structural strength, toughness and heat resistance of the valve body 11 and maintain the stability of the material in the environment where the safety valve 100 is in long-term contact with fluid.

[0069] For example, the percentage of glass fiber in the PPS material is 15%-50%, which enables the valve body 11 to maintain good corrosion resistance and stability, thereby improving the structural strength and service life of the safety valve 100. Figure 2In some embodiments of the present invention, the safety valve 100 further includes a limiting member 30, which is disposed within the water inlet connector 12. The limiting member 30 has an internal drain port 31, and the internal drain valve core 20 is configured to open and close the internal drain port 31. Specifically, the limiting member 30 can limit the internal drain valve core 20. When water is not needed to enter the inner tank, the internal drain valve core 20 can close the internal drain port 31 to prevent backflow of water in the inner tank. When cold water is introduced into the inner tank through the cold water inlet pipe, the internal drain valve core 20 can open the internal drain port 31. In addition, when the pressure in the inner tank exceeds the safety threshold, pressure can be released from the internal drain port 31. By setting the limiting member 30 to limit the internal drain valve core 20, the working stability of the safety valve 100 can be improved on the one hand; on the other hand, the assembly method of the safety valve 100 is optimized. Specifically, in combination with Figure 2 The arrow indicates the installation direction of the valve core. When assembling the safety valve 100, the internal leakage valve core 20 can be installed from the inlet connector 12 into the valve body 11, and then the limiting component 30 can be installed to improve the installation efficiency of the safety valve 100.

[0070] In addition, the limiting member 30 is located inside the water inlet connector 12. The water inlet connector 12 can protect the limiting member 30 and prevent the limiting member 30 from being affected when the water inlet connector 12 is connected to the cold water inlet pipe.

[0071] For example, the limiting member 30 can be threaded into the inner side of the water inlet connector 12, which facilitates the installation of the limiting member 30 and improves the connection stability between the limiting member 30 and the water inlet connector 12.

[0072] Combination Figure 2 The internal leakage valve core 20 includes a valve seat 21 and a valve core 22. The valve seat 21 has a pressure relief hole 211, which is opposite to the internal leakage port 31. The valve core 22 is movable along the axis of the pressure relief hole 211 to open and close the pressure relief hole 211. Specifically, when it is necessary to release the pressure in the inner tank, the valve core 22 can move along the axis of the pressure relief hole 211 toward the water inlet connector 12 and open the pressure relief hole 211 to protect the stable operation of the electric water heater. The pressure relief hole 211 is opposite to the internal leakage port 31. Specifically, the pressure relief hole 211 and the internal leakage port 31 are opposite each other along the axis of the pressure relief hole 211. Referring to the attached figure, the axis of the pressure relief hole 211 is A.

[0073] Combination Figure 2The internal relief valve core 20 also includes a first reset member 23, which has an elastic force that drives the valve core 22 to close the pressure relief port 211. Specifically, when the pressure in the inner liner does not exceed the safety threshold, that is, when the pressure value of the inner liner is normal, the first reset member 23 can drive the valve core 22 to close the pressure relief port 211, preventing fluid in the inner liner from flowing out. When the pressure in the inner liner exceeds the safety value, the pressure in the inner liner overcomes the elastic force of the first reset member 23, driving the valve core 22 to open the pressure relief port 211, thereby relieving pressure in the inner liner. For example, the first reset member 23 can be a spring.

[0074] The internal leakage valve core 20 also includes a second reset member 24, which has an elastic force that drives the valve seat 21 to abut against the limiting member 30. Specifically, when the cold water inlet pipe is not supplying water to the inner tank, the second reset member 24 can elastically drive the valve seat 21 to abut against the limiting member 30. At this time, the valve seat 21 can close the internal leakage port 31 to prevent backflow of water in the inner tank. When the cold water inlet pipe supplies water to the inner tank, the fluid pressure overcomes the elastic force of the second reset member 24, driving the valve seat 21 to move towards the outlet connector 13, causing the internal leakage valve core 20 to open the internal leakage port 31, facilitating the supply of water to the inner tank. For example, the second reset member 24 can be a spring.

[0075] Combination Figure 2 Furthermore, the valve body 11 is provided with a limiting flange 111, which is distributed opposite to the limiting member 30. The limiting flange 111 is closer to the outlet connector 13 relative to the limiting member 30, and the second reset member 24 elastically abuts against the limiting flange 111 and the valve seat 21. Specifically, the limiting flange 111 and the limiting member 30 can be distributed opposite to each other along the axial direction of the pressure relief hole 211. The limiting flange 111 and the limiting member 30 cooperate to limit the movement stroke of the internal leakage valve core 20, thereby improving the working stability of the safety valve 100.

[0076] For example, when assembling the safety valve 100, the internal leakage valve core 20 can be inserted into the valve body 11 from one end of the water inlet connector 12, and then the limiting member 30 can be installed to the water inlet connector 12. The limiting flange 111 and the limiting member 30 can cooperate to limit the internal leakage valve core 20, thereby optimizing the assembly method of the safety valve 100, improving installation efficiency, and enhancing the structural stability of the safety valve 100.

[0077] Combination Figure 2In some embodiments of the present invention, the internal leakage valve core 20 further includes a filter element 25, which filters the water entering the inner tank, preventing impurities in the water from affecting the components in the inner tank. The filter element 25 abuts against the limiting flange 111, and the second reset element 24 elastically abuts against the filter element 25 and the valve seat 21. Specifically, when cold water enters the inner tank through the inlet pipe, the fluid pressure overcomes the elastic force of the second reset element 24, causing the valve seat 21 to open the internal leakage port 31, allowing water to flow into the inner tank. The filter element 25 filters the water, and the abutment against the limiting flange 111 enhances the structural stability of the filter element 25. After the inner tank has been filled with water, the second reset element 24 drives the valve seat 21 to reset, closing the internal leakage port 31 and preventing backflow of water into the inner tank.

[0078] Combination Figure 6 In some embodiments of the present invention, the wall thickness of the valve body 11 is d1, and the wall thickness of the outlet connector 13 is d2, wherein d1 / d2 is greater than 1.5. It can be understood that the outlet connector 13 has external threads. After docking with the anti-electric wall 200, the outlet connector 13 is located inside the valve interface 220 of the anti-electric wall 200, while the valve body 11 is exposed. The wall thickness of the valve body 11 is greater than the wall thickness of the outlet connector 13. By controlling the wall thicknesses of the valve body 11 and the outlet connector 13 within a reasonable range, the material cost of the valve body 11 is reduced, and performance degradation of the valve body 11 during long-term use is avoided. Furthermore, when the safety valve 100 docks with the anti-electric wall 200, a tool can be used to clamp the valve body 11. The relatively thick wall thickness of the valve body 11 helps prevent damage to the safety valve 100 during installation.

[0079] For example, d1 / d2 can be 1.5, 1.8, 2.0, etc.

[0080] Combination Figure 6 In some embodiments of the present invention, the wall thickness of the valve body 11 is d1, and the wall thickness of the inlet connector 12 is d3, wherein d1 / d3 is greater than 1.5. Exemplarily, the inlet connector 12 may have external threads. After being connected to the cold water inlet pipe, the inlet connector 12 is located inside the cold water inlet pipe, while the valve body 11 is exposed. The wall thickness of the valve body 11 is greater than the wall thickness of the inlet connector 12. By controlling the wall thicknesses of the valve body 11 and the inlet connector 12 within a reasonable range, the material cost of the valve body 11 is reduced, and performance degradation of the valve body 11 during long-term use is avoided. Furthermore, when the safety valve 100 is connected to components such as the cold water inlet pipe, a tool can be used to clamp the valve body 11. The relatively thick wall thickness of the valve body 11 helps prevent damage to the safety valve 100 during installation.

[0081] For example, d1 / d3 can be 1.5, 1.8, 2.0, etc.

[0082] Combination Figure 5 In some embodiments of the present invention, the axial length of the valve body 11 is L0, and the axial length of the outlet connector 13 is L1, wherein L1 / L0 ≤ 1. That is, the axial length of the outlet connector 13 is smaller than the axial length of the valve body 11. By optimizing the axial dimensions of the valve body 11 and the outlet connector 13, the structure of the valve body 10 is made compact, and the structural strength of the valve body 11 is improved. Specifically, when the safety valve 100 is connected to the anti-electric wall 200, a tool can be used to clamp the valve body 11. The valve body 11 is relatively long, which facilitates clamping the valve body 11 with a tool, improves installation efficiency, and enhances the structural strength of the valve body 11, preventing damage to the safety valve 100 during installation.

[0083] For example, L1 / L0 can be 1, 0.75, 0.5, etc.

[0084] In some embodiments of the present invention, the axial length of the valve body 11 is L0, and the axial length of the inlet connector 12 is L2, wherein L2 / L0 ≤ 1. That is, the axial length of the inlet connector 12 is smaller than the axial length of the valve body 11. By optimizing the axial dimensions of the valve body 11 and the inlet connector 12, the structure of the valve body 10 is made compact, and the structural strength of the valve body 11 is improved. Specifically, when the safety valve 100 is connected to components such as the cold water inlet pipe, a tool can be used to clamp the valve body 11. The relatively long length of the valve body 11 facilitates clamping the valve body 11 with a tool, improving installation efficiency and enhancing the structural strength of the valve body 11, thus preventing damage to the safety valve 100 during installation.

[0085] For example, L2 / L0 can be 1, 0.75, 0.5, etc.

[0086] Combination Figure 5 In some embodiments of the present invention, the inlet connector 12 has an external thread. Exemplarily, the inlet connector 12 can be connected to a cold water inlet pipe; that is, the inlet connector 12 can be mated with the cold water inlet pipe. The external thread of the inlet connector 12 reduces the risk of cracking when it is mated with the cold water inlet pipe. When the safety valve 100 is mated with the cold water inlet pipe, the force borne by the inlet connector 12 is internal pressure, thus reducing the likelihood of cracking. Furthermore, after the safety valve 100 is mated with the cold water inlet pipe, the cold water inlet pipe can protect the inlet connector 12, thereby improving the structural strength and stability of the safety valve 100.

[0087] The outlet connector 13 and the inlet connector 12 have the same outer diameter, which reduces the design and manufacturing difficulty of the valve body 10. In addition, it can reduce the kinetic energy loss of the fluid caused by the abrupt change in size between the inlet connector 12 and the outlet connector 13.

[0088] Combination Figure 5 For example, the outer peripheral wall of the valve body 11 may be provided with an indicator arrow for the installation direction to indicate the installation direction of the safety valve 100 and to prevent mistaken installation of the safety valve 100.

[0089] Combination Figure 5 In some embodiments of the present invention, the outer peripheral wall of the valve body 11 has a polygonal cylindrical surface. One end of the valve body 11 extends to the external thread of the outlet connector 13, and the other end extends to the external thread of the inlet connector 12. Exemplarily, the safety valve 100 can be mated with the anti-electric shock wall 200. During mating, a tool can be used to clamp the outer peripheral wall of the valve body 11. By providing the polygonal cylindrical surface, the relative sliding between the tool and the valve body 11 can be limited, improving the installation efficiency of the safety valve 100. The fact that both ends of the polygonal cylindrical surface extend to the external threads of the outlet connector 13 and the inlet connector 12 respectively enhances the structural strength of the valve body 11 and facilitates clamping the valve body 11 with a tool, further improving installation efficiency.

[0090] Combination Figure 2 and Figure 6 In some embodiments of the present invention, the valve body 10 has an inner cavity 141, an outer cavity 142, and an external drain port 143. The external drain port 143 connects the inner cavity 141 and the outer cavity 142. The internal drain valve core 20 is disposed in the inner cavity 141. The safety valve 100 also includes an external drain valve core 40, which is used to open and close the external drain port 143 to control the on / off state of the inner cavity 141 and the outer cavity 142. Specifically, when the external drain valve core 40 closes the external drain port 143, the water in the inner tank will not be discharged through the external drain port 143. When the external drain valve core 40 opens the external drain port 143, the water in the inner tank can be discharged through the external drain port 143, thereby using the external drain port 143 to depressurize the inner tank.

[0091] During the heating process of an electric water heater, as the pressure inside the tank increases, it reaches the external leakage pressure opening value. The external leakage channel then opens, releasing water to reduce the pressure inside the tank and protect it. In related technologies, the safety valve body is made of metals such as copper, which have low hardness. Furthermore, the thickness of the anti-corrosion electroplating process inside the valve body is difficult to control. The inner side of the external leakage channel's R-port operates under high temperature and high pressure water conditions when the inner tank pressure reaches the leakage value. Uneven anti-corrosion plating makes it difficult to form effective corrosion protection, resulting in erosion gaps on the inner side of the R-port under the scouring action of high temperature and high pressure water. Meanwhile, the outer side of the external leakage channel's R-port is subjected to a harsh environment of wet and dry cycles, accelerating corrosion and creating corrosion gaps. When the corrosion gaps on the inner and outer sides of the external leakage channel's R-port connect, the sealing surface of the external leakage channel fails, leading to premature pressure release and water leakage.

[0092] The external vent 143 has a third plastic inner layer around its periphery, which reduces corrosion from long-term fluid erosion and improves the stability of the external vent 143 periphery. Combined with... Figure 6 In some embodiments of the present invention, the third plastic inner layer has a first annular rib 15, which surrounds the external discharge port 143 and abuts against the external discharge valve core 40 when the external discharge port 143 is closed. In conjunction with the foregoing, the third plastic inner layer has good corrosion resistance. The first annular rib 15 is part of the third plastic inner layer. Therefore, the first annular rib 15 has good corrosion resistance, which can prevent the first annular rib 15 from corroding and creating gaps during long-term fluid flushing, thus affecting the sealing performance of the safety valve 100 and improving the reliability of the safety valve 100.

[0093] In addition, in some embodiments of the present invention, the valve body 11 is made of plastic, that is, the third plastic inner layer can be part of the valve body 11. The valve body 11 can be integrally molded by injection molding. Compared with the related technology of setting an anti-corrosion layer or adding an anti-corrosion structure in the valve body 10, it can effectively reduce the production difficulty of the valve body 10. Moreover, the first annular rib 15 is part of the valve body 11. The first annular rib 15 has good structural strength and material stability, which improves the service life and reliability of the safety valve 100.

[0094] Combination Figure 6For example, the external leakage valve core 40 may be provided with a mating part 41, which can be used to block and open the external leakage port 143. The mating part 41 may be made of a flexible material such as rubber. When the external leakage valve core 40 blocks the external leakage port 143, the mating part 41 is compressed and can fill the gap between the external leakage port 143 and the mating part 41, blocking the leakage of fluid from the external leakage port 143. In conjunction with the above, the first annular rib 15 is made of plastic and is an integral structure with the valve body 11. The first annular rib 15 has good corrosion resistance and a stable structure. Therefore, the external leakage valve core 40 and the first annular rib 15 can cooperate to improve the reliability of the safety valve 100 and avoid corrosion of the valve body 10 leading to the aging of the sealing surface of the external leakage channel.

[0095] The first annular rib 15 can be an R-shaped protrusion, which can reduce stress concentration during the production process of the valve body 10. In addition, when the external leakage valve core 40 blocks the external leakage port 143, the mating part 41 and the first annular rib 15 form a progressive contact, which improves the sealing reliability.

[0096] Combination Figure 2 In some embodiments of the present invention, the external leakage valve core 40 has a mating portion 41 for sealing and opening the external leakage port 143. The mating portion 41 has a second annular rib 411. When the mating portion 41 seals the external leakage port 143, the second annular rib 411 abuts against the third plastic inner layer. Exemplarily, the mating portion 41 can be made of a flexible material such as rubber. In conjunction with the foregoing, the third plastic inner layer has good corrosion resistance. Therefore, under the scouring action of high temperature and high pressure water, the periphery of the external leakage port 143 can maintain good material stability. The second annular rib abuts against the third plastic inner layer, which facilitates sealing the gap between the external leakage port 143 and the mating portion 41 when the mating portion 41 seals the external leakage port 143, thereby improving the service life and reliability of the safety valve 100.

[0097] Combination Figures 7 to 9 The present invention also proposes an anti-electric shock wall 200, which has a flow channel 210 and a valve interface 220 connecting the flow channel 210. The valve interface 220 has an internal thread on its inner side, which is used to mate with the external thread of the outlet connector 13 of the aforementioned safety valve 100. Specifically, the anti-electric shock wall 200 is used to prevent electric shock accidents caused by leakage. The anti-electric shock wall 200 has a flow channel 210 that connects the inner tank of the water heater and the safety valve 100. When the safety valve 100 is connected to the anti-electric shock wall 200, because the outlet connector 13 of the safety valve 100 has an external thread, it bears pressure, so the outlet connector 13 is not prone to cracking. After the safety valve 100 and the anti-electric shock wall 200 are connected, the anti-electric shock wall 200 can protect the outlet connector 13, thereby improving the structural strength and stability of the safety valve 100.

[0098] Furthermore, the anti-electric shock wall 200 includes a main body 230 and an insert 240. A flow channel 210 and a valve interface 220 are located in the main body 230, and the insert 240 is located in the valve interface 220. An internal thread is provided on the inner circumferential surface of the insert 240. (See reference...) Figure 10 In related technologies, the connection between the safety valve 100 and the anti-electric wall 200 is such that the safety valve 100 is inside and the connector of the anti-electric wall 200 is outside. The insert 240 is located on the outside of the valve interface 220, and the external thread is located on the outer circumferential surface of the insert 240. The insert 240 has a large volume and is usually made of metal, so the cost is high. In the embodiment of the present invention, the insert 240 of the anti-electric wall 200 is located inside the valve interface 220 and is an internally threaded insert 240, which can reduce the volume of the insert 240 and reduce the production cost. Moreover, when the water outlet connector 13 is connected to the insert 240, the force borne by the water outlet connector 13 is pressure. Therefore, the valve body 10 is not prone to cracking.

[0099] Combination Figure 9 In some embodiments of the present invention, a third annular rib 221 is provided on the inner side of the valve interface 220, and an annular groove is provided between the inner circumferential surface of the valve interface 220 and the third annular rib 221. The periphery of the end of the insert 240 extends into the annular groove. Compared with the structure of the insert 240 connected to the outside of the anti-electric wall 200, the structural strength of the insert 240 and the connection stability with the main body 230 can be effectively improved, thereby improving the connection stability between the anti-electric wall 200 and the safety valve 100.

[0100] This invention also proposes a water heater, comprising: an inner tank, the aforementioned safety valve 100, and an anti-electric shock wall 200, wherein the inner tank has a water storage cavity; the flow channel 210 of the anti-electric shock wall 200 communicates with the water storage cavity, and the valve interface 220 is threadedly engaged with the external thread of the outlet interface of the safety valve 100. By setting the aforementioned safety valve 100 and anti-electric shock wall 200, the safety of the water heater can be improved.

[0101] Combination Figure 8 and Figure 9 According to an embodiment of the present invention, the water heater further includes a sealing ring 300. The sealing ring 300 is disposed at the valve interface 220 and abuts against the end of the water outlet connector 13. That is, the sealing ring 300 and the water outlet connector 13 form an end face seal. After the external thread of the water outlet connector 13 is threadedly engaged with the internal thread of the valve interface 220, the preload of the thread is used to seal the gap between the water outlet connector 13 and the valve interface 220, preventing fluid leakage and improving the sealing performance of the anti-electric shock wall 200 and the safety valve 100.

[0102] In the description of this invention, it should be understood that the terms "length", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0103] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0104] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0105] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0107] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safety valve, characterized in that, include: The valve body has a valve body, an inlet connector and an outlet connector, the valve body is connected to the inlet connector and the outlet connector respectively, and the outlet connector has an external thread; An internal leakage valve core is disposed in the valve body and is used to control the connection and disconnection of the outlet connector and the inlet connector.

2. The safety valve according to claim 1, characterized in that, The water outlet connector has a first plastic inner layer.

3. The safety valve according to claim 2, characterized in that, The water outlet connector also includes a first plastic outer layer, which surrounds the first plastic inner layer, and the outer peripheral surface of the first plastic outer layer is provided with the external thread. The first plastic outer layer and the first plastic inner layer are integrally formed plastic parts.

4. The safety valve according to claim 2, characterized in that, The water outlet connector also has a metal layer, which surrounds the outer side of the first plastic inner layer, and the outer peripheral surface of the metal layer forms the external thread.

5. The safety valve according to claim 4, characterized in that, The metal layer includes a sleeve portion and a fixing portion. The sleeve portion is stacked and connected to the outer side of the first plastic inner layer. The valve body includes a second plastic inner layer and a second plastic outer layer. The inner side of the second plastic inner layer communicates with the inner side of the first plastic inner layer. The fixing portion is positioned between the second plastic inner layer and the second plastic outer layer.

6. The safety valve according to claim 1, characterized in that, The valve body is made of plastic.

7. The safety valve according to claim 1, characterized in that, The safety valve also includes a limiting member disposed within the inlet connector. The limiting member has an internal vent, and the internal vent valve core is configured to open and close the internal vent.

8. The safety valve according to claim 7, characterized in that, The internal leakage valve core includes: A valve seat, wherein the valve seat is provided with a pressure relief hole, the pressure relief hole being opposite to the inner vent. A valve core, movable along the axis of the pressure relief orifice to open and close the pressure relief orifice; A first reset element has an elastic force that drives the valve core to close the pressure relief hole; The second reset member has an elastic force that drives the valve seat to abut against the limiting member.

9. The safety valve according to claim 8, characterized in that, The valve body is provided with a limiting flange, which is distributed opposite to the limiting member. The limiting flange is closer to the water outlet connector than the limiting member. The second reset member elastically abuts between the limiting flange and the valve seat.

10. The safety valve according to claim 9, characterized in that, The internal leakage valve core also includes a filter element, which abuts against the limiting flange, and the second reset element elastically abuts between the filter element and the valve seat.

11. The safety valve according to claim 1, characterized in that, The wall thickness of the valve body is d1, and the wall thickness of the outlet connector is d2, wherein d1 / d2≥1.5; And / or, the wall thickness of the valve body is d1, and the wall thickness of the inlet connector is d3, wherein d1 / d3≥1.

5.

12. The safety valve according to claim 1, characterized in that, The valve body has an axial length dimension L0, and the outlet connector has an axial length dimension L1, wherein L1 / L0≤1; And / or, the axial length dimension L0 of the valve body and the axial length dimension L2 of the inlet connector, wherein L2 / L0≤1.

13. The safety valve according to claim 1, characterized in that, The water inlet connector has external threads. Wherein, the outer circumferential surfaces of the water outlet connector and the water inlet connector have the same diameter; And / or, the outer peripheral wall of the valve body has a polygonal cylindrical surface, one end of the valve body extends to the external thread of the outlet connector, and the other end extends to the external thread of the inlet connector.

14. The safety valve according to claim 1, characterized in that, The valve body has an inner cavity, an outer cavity, and an external vent. The external vent connects the inner cavity and the outer cavity. The internal vent valve core is disposed in the inner cavity. The safety valve also includes an external vent valve core, which is used to open and close the external vent to control the connection between the inner cavity and the outer cavity. The periphery of the external vent has a third plastic inner layer. Wherein, the third plastic inner layer has a first annular rib, which is arranged around the external vent and abuts against the external vent valve core when the external vent valve core closes the external vent; and / or, the external vent valve core has a mating part for sealing and opening the external vent, the mating part having a second annular rib, which abuts against the third plastic inner layer when the mating part seals the external vent.

15. An anti-electric shock wall, characterized in that, The anti-electric wall has a flow channel and a valve interface communicating with the flow channel. The valve interface has an internal thread on its inner side, which is used to engage with the external thread of the outlet interface of the safety valve according to any one of claims 1-14.

16. The anti-electric shock wall according to claim 15, characterized in that, The anti-electric shock wall includes a main body and an insert. The flow channel and the valve interface are located in the main body, the insert is located in the valve interface, and the internal thread is located on the inner circumferential surface of the insert.

17. The anti-electric shock wall according to claim 16, characterized in that, The valve interface has a third annular rib on its inner side, and an annular groove is provided between the inner circumferential surface of the valve interface and the third annular rib. The periphery of the end of the insert extends into the annular groove.

18. A water heater, characterized in that, include: Inner liner, wherein the inner liner has a water storage cavity; The safety valve according to any one of claims 1-14; According to any one of claims 15-17, the anti-electric wall has the flow channel communicating with the water storage chamber, and the valve interface is threadedly engaged with the external thread of the outlet interface of the safety valve.

19. The water heater according to claim 18, characterized in that, It also includes a sealing ring, which is located at the valve interface and abuts against the end of the water outlet connector.

Images