Safety valve and electric water heater

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses a safety valve and an electric water heater. The safety valve comprises a valve body, an annular gasket and a supporting seat, the valve body comprises a water inlet pipe, one end of the water inlet pipe forms a water inlet end, the other end of the water inlet pipe forms a water outlet end, an annular step face is arranged in the water inlet pipe, the annular gasket is arranged on the annular step face, and the annular width of the annular gasket is larger than that of the annular step face. The supporting base is arranged in the water inlet pipe, the end, facing the annular step face, of the supporting base is supported on the annular gasket, and the supporting base is used for limiting the valve element assembly in the water inlet pipe. The supporting seat is made of the plastic material, so that the production cost of the safety valve can be reduced. Meanwhile, the annular gasket is a metal piece, the ring width of the annular gasket is larger than that of the annular step face, and due to the fact that the annular gasket makes full contact with the annular step face and the supporting base, the annular gasket can evenly disperse pressure and effectively prevent the supporting base from being damaged due to overlarge local stress, and therefore the service life of the supporting base is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot water supply equipment technical field, especially to a kind of safety valve and electric water heater. BACKGROUND

[0002] As the common parts of water storage type electric water heater, safety valve has a vital role.In the cold water stage of water heater, safety valve can ensure that cold water flows in one direction, effectively avoid the occurrence of hot water backflow condition;And when the water heater is in heating state, safety valve can timely release the pressure of inner bag, to prevent the inner bag from being damaged due to high pressure.

[0003] However, the safety valve of water heater on the market is usually made of metal material, resulting in high production cost of safety valve. INVENTION CONTENTS

[0004] The first technical problem solved by the utility model is to provide a safety valve, which effectively solves the problem of high cost of existing safety valve, and the support seat is made of plastic material, which can reduce the production cost of safety valve.Meanwhile, the annular gasket of metal material is in full contact with the annular stepped surface and the support seat, and the annular gasket can evenly distribute the pressure, effectively prevent the support seat from being damaged due to excessive local stress, thereby prolong the service life of the support seat, and indirectly ensure the reliability and stability of the safety valve as a whole.

[0005] The second technical problem solved by the utility model is to provide an electric water heater, which effectively solves the problem of high cost of existing safety valve, and the support seat is made of plastic material, which can reduce the production cost of safety valve.Meanwhile, the annular gasket of metal material is in full contact with the annular stepped surface and the support seat, and the annular gasket can evenly distribute the pressure, effectively prevent the support seat from being damaged due to excessive local stress, thereby prolong the service life of the support seat, and indirectly ensure the reliability and stability of the safety valve as a whole.

[0006] The first technical problem is solved by the following technical scheme:

[0007] A safety valve, comprising:

[0008] Valve body, comprising water inlet pipe, one end of the water inlet pipe forms water inlet end, the other end forms water outlet end, annular stepped surface is arranged in the water inlet pipe;

[0009] Annular gasket, metal part, the annular gasket is arranged on the annular stepped surface, the ring width of the annular gasket is greater than the ring width of the annular stepped surface;

[0010] A support seat made of plastic is arranged in the water inlet pipe and supported on the annular gasket at one end of the annular step surface, and is used for limiting the valve core assembly in the water inlet pipe.

[0011] Compared with the background art, the safety valve has the beneficial effects that:

[0012] The support seat is made of plastic material, the cost of plastic material is relatively low, and the forming process of plastic is relatively simple and efficient compared with the metal processing process, so that the production cost can be reduced.

[0013] In addition, the annular gasket is a metal piece and its ring width is greater than that of the annular step surface, and the one end of the support seat towards the annular step surface is arranged on the annular gasket.

[0014] In one of the embodiments, the ring width of the annular gasket is b, and satisfies 2mm≤b≤3mm; and / or, the thickness of the annular gasket is t, and satisfies 0.5mm≤t≤1mm; and / or, the inner diameter of the annular gasket is d, and satisfies 11mm≤d≤15mm.

[0015] In one of the embodiments, the ring width of the annular step surface is c, and satisfies 1.8mm≤c≤2.2mm.

[0016] In one of the embodiments, along the height direction of the support seat, the height of the support seat is h, and satisfies 5mm≤h≤8mm.

[0017] In one of the embodiments, a sealing ring is further included, and the one end of the support seat towards the annular step surface is provided with a first mounting step for mounting the sealing ring, and the sealing ring is clamped between the water inlet pipe and the support seat and abuts against the annular gasket.

[0018] In one of the embodiments, a sealing ring is further included, and the periphery of the support seat is provided with an annular groove for mounting the sealing ring, and the sealing ring is clamped between the annular groove and the inner wall of the water inlet pipe.

[0019] In one of the embodiments, one end of the inner wall of the water inlet pipe close to the water outlet end is provided with an internal thread, and the outer wall of the support seat is provided with an external thread corresponding to the internal thread, and the support seat is threadedly connected with the water inlet pipe.

[0020] In one of the embodiments, a sealing gasket is further included, and the support base is provided with a second mounting step for mounting the sealing gasket at one end close to the water outlet end, and a top surface of the sealing gasket is protruded from a top surface of the support base and used for abutting against a water inlet pipe of the electric water heater.

[0021] In one of the embodiments, a plurality of protruding portions are arranged at an outer wall periphery of the sealing gasket, and the protruding portions are engaged with the internal thread.

[0022] The second technical problem is solved by the following technical scheme:

[0023] An electric water heater comprises:

[0024] A water heater body is provided with a water inlet pipe;

[0025] A safety valve, the water outlet end of the water inlet pipe is communicated with the water inlet pipe.

[0026] Compared with the background art, the electric water heater has the beneficial effects that when the pressure in the inner container of the electric water heater is too large, the safety valve can timely release the pressure in the inner container of the electric water heater, effectively preventing the inner container from being damaged due to the excessively high pressure. Meanwhile, the support base is made of plastic material, the cost of the plastic material is relatively low, and the forming process of the plastic material is relatively simple and efficient compared with the metal processing process, so that the production cost can be reduced, and the structural strength of the safety valve can meet the use requirements through the reasonable structural design. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 It is a structural schematic view of a safety valve of the embodiments of the present application;

[0029] Figure 2 It is Figure 1 It is an explosion schematic view of the safety valve;

[0030] Figure 3 It is Figure 2 It is an enlarged schematic view of the support base, the annular gasket, the sealing gasket and the sealing ring;

[0031] Figure 4 It is Figure 1 It is a sectional view of the safety valve;

[0032] Figure 5 Figure 1 is a sectional view of a safety valve according to the present application. Figure 4 Figure 2 is a sectional view of a safety valve according to the present application.

[0033] Figure 6 Figure 3 is a sectional view of a safety valve according to the present application. Figure 1 Figure 4 is a sectional view of a safety valve according to the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 1. valve body; 101. inlet pipe; 1011. inlet end; 1012. outlet end; 1013. annular step surface; 1014. internal thread; 102. pressure relief pipe; 2. support seat; 201. external thread; 202. second mounting step; 203. first mounting step; 204. annular groove; 3. annular gasket; 4. sealing gasket; 401. protrusion; 5. sealing ring; 6. one-way valve spring; 7. internal relief spring; 8. spring seat; 9. flat gasket; 10. valve stem; 11. rubber plug; 12. safety valve spool; 13. pull rod; 14. mounting pin; 15. safety valve spring; 16. sealing ring; 17. sealing cover; 18. sealing gasket; 19. pressure relief valve handle. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] In the related art, the safety valves of water heaters currently on the market are usually made of metal materials, resulting in high production costs of the safety valves.

[0041] In order to solve the above technical problems, the following Figures 1 to 6 Shown, an embodiment of the present utility model is described.

[0042] According to an embodiment of the present invention, on the one hand, Figures 1 to 6 As shown, a safety valve is provided, comprising a valve body 1 , an annular gasket 3 and a support seat 2 .

[0043] Specifically, if Figures 1 to 4 As shown, the valve body 1 includes a water inlet pipe 101 , one end of the water inlet pipe 101 forms a water inlet end 1011 , and the other end of the water inlet pipe 101 forms a water outlet end 1012 , wherein an annular step surface 1013 is provided in the water inlet pipe 101 .

[0044] Specifically, if Figures 3 to 5 As shown, the annular gasket 3 is a metal part, the annular gasket 3 is installed on the annular step surface 1013 , and the ring width of the annular gasket 3 is greater than the ring width of the annular step surface 1013 .

[0045] Specifically, if Figures 3 to 5 As shown, the support seat 2 is a plastic part, which is installed in the water inlet pipe 101, and one end of the support seat 2 facing the annular step surface 1013 is supported on the annular gasket 3. The support seat 2 is used to limit the valve core assembly in the water inlet pipe 101.

[0046] Because the support base 2 of this safety valve is made of plastic, the material cost is relatively low, and the plastic molding process is simpler and more efficient than metal processing, which can reduce production costs. The plastic support base 2 has good corrosion resistance and is not easily rusted or corroded in an environment with long-term contact with water, thereby extending the service life of the safety valve.

[0047] It can be understood that when the safety valve is connected with the electric water heater, the water inlet pipe of the electric water heater extrudes the support seat 2. In addition, the annular gasket 3 is a metal piece, and the ring width of the annular gasket 3 is greater than the ring width of the annular stepped surface 1013. The one end of the support seat 2 towards the annular stepped surface 1013 is arranged on the annular gasket 3. When the support seat 2 is subjected to external pressure, since the annular gasket 3 is in full contact with the annular stepped surface 1013 and the support seat 2, the annular gasket 3 can uniformly disperse the pressure, effectively preventing the support seat 2 from being damaged due to excessive local stress, thereby prolonging the service life of the support seat 2 and indirectly ensuring the reliability and stability of the safety valve as a whole. In addition, the support seat 2 can accurately limit the valve core assembly, ensure the accurate relative position of the internal components of the safety valve, and be beneficial to the normal work of the safety valve, thereby improving the assembly precision and performance stability of the product.

[0048] Specifically, the valve body 1 can be made of metal or non-metal material. In the embodiment, the material of the valve body 1 is not limited.

[0049] Specifically, as shown in Figure 1 , the valve body 1 further comprises a pressure relief pipe 102. The pressure relief pipe 102 is in communication with the water inlet pipe 101. When the electric water heater is in a heating state, the pressure relief pipe 102 of the safety valve can timely release the pressure in the inner container of the electric water heater, effectively preventing the inner container from being damaged due to excessive pressure.

[0050] Specifically, as shown in Figure 2 , the pressure relief pipe 102 can be provided with a rubber plug 11, a safety valve core 12, a pull rod 13, a mounting pin 14, a safety valve spring 15, a sealing washer 16, a sealing cover 17, a sealing gasket 18, etc. A pressure relief valve handle 19 can be arranged at the end of the pressure relief pipe 102. The pressure relief valve handle 19 can be pulled to actively release the pressure through the pressure relief pipe 102.

[0051] Specifically, as shown in Figure 2 , the valve core assembly comprises a one-way valve spring 6, an inner relief spring 7, a spring seat 8, a flat gasket 9 and a valve rod 10.

[0052] In one embodiment, as shown in Figure 4 and Figure 5 , the ring width of the annular gasket 3 is b, and satisfies 2mm≤b≤3mm. And / or, the thickness of the annular gasket 3 is t, and satisfies 0.5mm≤t≤1mm. And / or, the inner diameter of the annular gasket 3 is d, and satisfies 11mm≤d≤15mm.

[0053] When the ring width b of the ring-shaped gasket 3 is in the range of 2mm to 3mm, sufficient area can be provided to disperse the pressure when the support seat 2 is subjected to external pressure. A suitable ring width ensures that the pressure is evenly distributed in the contact area between the support seat 2 and the ring-shaped stepped surface 1013, effectively preventing the support seat 2 from being damaged by excessive local stress, thereby improving the service life of the support seat 2.

[0054] If the ring width of the ring-shaped gasket 3 is too narrow, it may not be able to sufficiently disperse the pressure when subjected to a larger pressure, resulting in local stress concentration on the support seat 2; while a too large ring width of the ring-shaped gasket 3 may increase the material cost and be inconvenient to install in limited space.

[0055] When the thickness of the ring-shaped gasket 3 is set in the range of 0.5mm to 1mm, sufficient structural strength can be provided for the ring-shaped gasket 3. Under long-term pressure, a thicker ring-shaped gasket 3 is less likely to deform or be damaged, ensuring its continuous and effective pressure dispersion and maintaining the stability of the internal structure of the safety valve.

[0056] If the ring-shaped gasket 3 is too thin, it may fatigue and deform under repeated pressure, affecting its protective effect on the support seat 2 and pressure dispersion function. If the ring-shaped gasket 3 is too thick, it will occupy too much internal space in the water inlet pipe 101.

[0057] When the inner diameter d of the ring-shaped gasket 3 is in the range of 11mm to 15mm, it is well adapted to the inner diameter of the water inlet pipe 101 of the safety valve and other related components such as the valve core assembly. A suitable inner diameter of the ring-shaped gasket 3 can ensure that the water flow can smoothly pass through the area where the ring-shaped gasket 3 is located during the process of cold water inflow and hot water liner pressure release, without causing excessive water flow resistance due to too small inner diameter, affecting the normal working efficiency of the safety valve; at the same time, it will not cause unstable water flow or adversely affect the positioning and work of the valve core assembly and other components due to too large inner diameter.

[0058] In one embodiment, as shown in Figure 4 and Figure 5 the ring width of the ring-shaped stepped surface 1013 is c, which satisfies 1.8mm≤c≤2.2mm.

[0059] The ring width c of the ring-shaped stepped surface 1013 is between 1.8mm and 2.2mm, which can provide stable support force to the ring-shaped gasket 3. When the support seat 2 is subjected to pressure, the ring-shaped gasket 3 can better fit on the ring-shaped stepped surface 1013, so that the pressure can be evenly transmitted from the support seat 2 to the ring-shaped stepped surface 1013, and then dispersed to the entire valve body 1 structure.

[0060] If the width of the annular step surface 1013 is too narrow, the pressure may be concentrated in a local area and cannot be effectively dispersed, increasing the risk of damage to the valve body 1; if the width of the annular step surface 1013 is too wide, it may not cooperate well with the annular gasket 3, affecting the pressure transmission effect, and at the same time causing the inner diameter of the water inlet pipe 101 to be smaller, resulting in excessive water flow resistance.

[0061] In one embodiment, Figure 4 and Figure 5 As shown, along the height direction of the support base 2, the height of the support base 2 is h, which satisfies 5mm≤h≤8mm.

[0062] When the height h of the support base 2 is between 5 mm and 8 mm, it provides sufficient structural strength for the support base 2 itself. When subjected to the impact force of water flow, squeezing force, and the forces generated by changes in the inner tank pressure, it can effectively resist these external forces and is not easily deformed or damaged. Furthermore, when the height of the support base 2 is within this range, the support base 2 does not occupy excessive space within the water inlet pipe 101, thereby facilitating the connection of the water inlet pipe 101 to the water inlet pipe of the electric water heater.

[0063] If the height of the support base 2 is too low, the support base 2 may be too thin and unable to withstand large external forces; if the height is too high, it may increase the material consumption and affect the stability of the connection between the safety valve and the electric water heater.

[0064] In one embodiment, Figures 3 to 5 As shown, it also includes a sealing ring 5. The end of the support base 2 facing the annular step surface 1013 is provided with a first mounting step 203, and the first mounting step 203 is used to mount the sealing ring 5. The sealing ring 5 is sandwiched between the water inlet pipe 101 and the support base 2, and the sealing ring 5 abuts against the annular gasket 3.

[0065] The first mounting step 203 on the support base 2 provides a precise mounting position for the sealing ring 5 , which helps workers to accurately place the sealing ring 5 during the assembly process, ensuring that the sealing ring 5 is correctly matched with the annular gasket 3 and the water inlet pipe 101 .

[0066] The sealing ring 5 is sandwiched between the water inlet pipe 101 and the support base 2 and abuts against the annular gasket 3, improving the sealing performance of the safety valve. When the electric water heater is supplied with cold water, the sealing ring 5 effectively prevents cold water from flowing back out of the gap between the support base 2 and the water inlet pipe 101. When the pressure in the electric water heater's inner tank increases, the sealing ring 5 prevents hot water or steam from leaking around the valve core assembly, ensuring the one-way flow and pressure control functions of the safety valve are reliable.

[0067] In one embodiment, combined Figure 5 and Figure 6As shown, the sealing ring 5 is further included, and the peripheral side of the support base 2 is provided with an annular groove 204 for installing the sealing ring 5, and the sealing ring 5 is clamped between the annular groove 204 and the inner wall of the water inlet pipe 101.

[0068] By providing the annular groove 204 on the peripheral side of the support base 2, during the installation of the sealing ring 5, the sealing ring 5 is only needed to be sleeved on the support base 2, and the sealing ring 5 is clamped in the annular groove 204, so as to facilitate the installation of the sealing ring 5 and the support base 2.

[0069] The sealing ring 5 is clamped between the annular groove 204 and the inner wall of the water inlet pipe 101, which improves the sealing performance of the safety valve. When cold water enters the electric water heater, the sealing ring 5 can effectively prevent the cold water from flowing out from the gap between the support base 2 and the water inlet pipe 101; when the pressure of the inner container of the electric water heater rises, the sealing ring 5 can prevent hot water or steam from leaking from around the valve core assembly, and ensure the reliable one-way flow and pressure control functions of the safety valve.

[0070] In an embodiment, as shown in Figures 3 to 5 The inner wall of the water inlet pipe 101 is provided with an inner thread 1014 near one end of the water outlet end 1012, and the outer wall of the support base 2 is provided with an outer thread 201 corresponding to the inner thread 1014. The support base 2 is threadedly connected with the water inlet pipe 101.

[0071] The inner wall of the water inlet pipe 101 is provided with the inner thread 1014, and the outer wall of the support base 2 is provided with the outer thread 201. The support base 2 is threadedly connected with the water inlet pipe 101, which can ensure that the support base 2 is stably fixed in the water inlet pipe 101, guarantee accurate positioning of the valve core assembly, and maintain the stability of the internal structure of the safety valve. At the same time, the inner thread 1014 of the water inlet pipe 101 is arranged at the water outlet end 1012, so as to facilitate the threadedly connecting of the water inlet pipe 101 and the water inlet pipeline of the electric water heater.

[0072] In an embodiment, as shown in Figures 3 to 5 The support base 2 is further provided with a second mounting step 202 near one end of the water outlet end 1012, and the second mounting step 202 is used for mounting the sealing gasket 4. The top surface of the sealing gasket 4 mounted on the second mounting step 202 protrudes from the top surface of the support base 2, and the top surface of the sealing gasket 4 abuts against the water inlet pipeline of the electric water heater.

[0073] The second mounting step 202 on the support base 2 provides an accurate mounting position for the sealing gasket 4, which is helpful for workers to accurately place the sealing gasket 4 during assembly, so as to facilitate the installation of the sealing gasket 4 and the support base 2.

[0074] The sealing gasket 4 protrudes from the top surface of the support base 2 and abuts against the water inlet pipe of the electric water heater, thereby ensuring the sealing of the connection between the support base 2 and the water inlet pipe.

[0075] Specifically, the sealing gasket 4 and the sealing ring 5 can be made of rubber or other elastic sealing materials, and the type of the sealing gasket 4 and the sealing ring 5 is not limited in the embodiment.

[0076] In one embodiment, as shown in the drawings, the outer wall of the sealing gasket 4 is provided with a plurality of protruding portions 401, and the plurality of protruding portions 401 are arranged at intervals. Figure 3

[0077] The plurality of protruding portions 401 on the outer wall of the sealing gasket 4 are clamped with the internal thread 1014 on the inner wall of the water inlet pipe 101, which can effectively prevent the displacement of the sealing gasket 4 during operation, and can make the sealing gasket 4 stably remain in the installation position, thereby ensuring that the top surface of the sealing gasket 4 always abuts against the water inlet pipe of the electric water heater, maintaining good sealing effect and improving the sealing reliability of the connection part between the safety valve and the electric water heater.

[0078] Specifically, the plurality of protruding portions 401 can be uniformly arranged around the outer wall of the sealing gasket 4. The outer wall of the protruding portion 401 can be arc-shaped, which is convenient for the protruding portion 401 to be clamped into the gap of the internal thread 1014 when the sealing gasket 4 is installed, and the distribution manner and structure of the protruding portion 401 are not limited in the embodiment.

[0079] According to the embodiment of the utility model, on the other hand, an electric water heater is also provided, which comprises a water heater body and a safety valve.

[0080] Specifically, the water heater body is provided with a water inlet pipe (not shown in the drawings).

[0081] Specifically, the outlet end 1012 of the water inlet pipe 101 in the water heater body is in communication with the water inlet pipe. Figure 1

[0082] The electric water heater can timely release the pressure in the inner container of the electric water heater through the safety valve when the pressure in the inner container is too large, thereby effectively preventing the inner container from being damaged due to the excessively high pressure. Meanwhile, the support base 2 is made of plastic material, the cost of the plastic material is relatively low, and the forming process of the plastic material is relatively simple and efficient compared with the metal processing process, thereby reducing the production cost, and the structural strength of the safety valve can meet the use requirement through the reasonable structural design.

[0083] ​​In the specific contents of the foregoing specific embodiments, each technical feature can be combined arbitrarily without contradiction, and to make the description brief, all possible combinations of the foregoing technical features are not described, however, as long as the combinations of the technical features do not exist contradiction, it should be considered that it is within the scope of the description.

[0084] The specific contents of the foregoing specific embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it should not be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A safety valve, characterized in that: include: The valve body (1) comprises a water inlet pipe (101), one end of the water inlet pipe (101) forms a water inlet end (1011), and the other end forms a water outlet end (1012), and an annular step surface (1013) is provided in the water inlet pipe (101); An annular gasket (3) is a metal part, the annular gasket (3) is arranged on the annular step surface (1013), and the annular width of the annular gasket (3) is greater than the annular width of the annular step surface (1013); The support seat (2) is a plastic part. The support seat (2) is arranged in the water inlet pipe (101) and one end facing the annular step surface (1013) is supported on the annular gasket (3). The support seat (2) is used to limit the valve core assembly in the water inlet pipe (101).

2. The safety valve according to claim 1, characterized in that: The ring width of the annular gasket (3) is b, which satisfies 2mm≤b≤3mm; and / or the thickness of the annular gasket (3) is t, which satisfies 0.5mm≤t≤1mm; and / or the inner diameter of the annular gasket (3) is d, which satisfies 11mm≤d≤15mm.

3. The safety valve according to claim 1, characterized in that: The annular step surface (1013) has a ring width c, which satisfies 1.8 mm ≤ c ≤ 2.2 mm.

4. The safety valve according to claim 1, characterized in that: Along the height direction of the support base (2), the height of the support base (2) is h, which satisfies 5mm≤h≤8mm.

5. The safety valve according to claim 1, characterized in that: It also includes a sealing ring (5); one end of the support seat (2) facing the annular step surface (1013) is provided with a first installation step (203) for installing the sealing ring (5); the sealing ring (5) is clamped between the water inlet pipe (101) and the support seat (2) and abuts against the annular gasket (3).

6. The safety valve according to claim 1, characterized in that: It also includes a sealing ring (5), and an annular groove (204) for installing the sealing ring (5) is provided on the peripheral side of the support seat (2), and the sealing ring (5) is clamped between the annular groove (204) and the inner wall of the water inlet pipe (101).

7. The safety valve according to any one of claims 1 to 6, characterized in that: An inner wall of the water inlet pipe (101) is provided with an internal thread (1014) at one end close to the water outlet end (1012), an outer wall of the support seat (2) is provided with an external thread (201) corresponding to the internal thread (1014), and the support seat (2) is threadedly connected to the water inlet pipe (101).

8. The safety valve according to claim 7, characterized in that: It also includes a sealing gasket (4); an end of the support seat (2) close to the water outlet end (1012) is provided with a second installation step (202) for installing the sealing gasket (4); the top surface of the sealing gasket (4) protrudes from the top surface of the support seat (2) and is used to abut against the water inlet pipe of the electric water heater.

9. The safety valve according to claim 8, characterized in that: A plurality of protrusions (401) are arranged at intervals on the peripheral side of the outer wall of the sealing gasket (4), and the protrusions (401) are engaged with the internal thread (1014).

10. An electric water heater, characterized in that: include: The water heater body is provided with a water inlet pipe; The safety valve according to any one of claims 1 to 9, wherein the water outlet end (1012) of the water inlet pipe (101) is connected to the water inlet pipeline.

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