Electric heating safety valve and electric water heater

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses an electric heating safety valve and an electric water heater. The electric heating water valve comprises a water outlet pipe and a pressure relief valve body which are integrally formed, a cavity is formed in the water outlet pipe, a core pipe and an inner pipe are arranged in the cavity, the core pipe is sleeved with the inner pipe, a first gap is reserved between the inner pipe and the core pipe, and a second gap is reserved between the inner pipe and the inner wall of the cavity; a flow guide hole is formed in the core pipe, and the flow guide hole, the first gap and the second gap are sequentially communicated in a circuitous mode to form a water way communicating the water inlet and the water outlet of the water outlet pipe. Compared with the mode that the electricity-proof wall and the pressure release valve are connected in a screwed mode, the water outlet pipe and the pressure release valve body are integrally formed, on one hand, leakage at the joint of the water outlet pipe and the pressure release valve body can be prevented, and safety and reliability of the electric heating water valve are improved; and on the other hand, thread machining does not need to be carried out on the connecting position of the two parts, so that the machining process is simplified, the production cost is reduced, meanwhile, follow-up installation is facilitated, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of hot water supply equipment, and in particular to an electric heating safety valve and an electric water heater. Background Technology

[0002] To improve the safety of electric water heaters, an anti-electric shock wall and a pressure relief valve are generally installed at the water inlet. The specific installation steps for the anti-electric shock wall and pressure relief valve at the water inlet are as follows: first, screw the outlet of the anti-electric shock wall into the water inlet of the water heater; then, screw the outlet of the pressure relief valve into the inlet of the anti-electric shock wall; finally, connect the inlet of the pressure relief valve to the tap water pipe. However, because this installation method involves installing three connection points, it not only increases the complexity of the water heater installation but also increases the risk of leaks during subsequent use. Utility Model Content

[0003] The first technical problem solved by this utility model is to provide an electric heating safety valve, which effectively solves the problem that the existing electric water heaters involve multiple connection points for installation and sealing operations, resulting in cumbersome initial installation and easy leakage later.

[0004] The second technical problem solved by this utility model is to provide an electric water heater that effectively solves the problem that existing electric water heaters involve multiple connection points for installation and sealing, which leads to cumbersome initial installation and easy leakage later.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] An electric heating safety valve includes an integrally formed water outlet pipe and a pressure relief valve body. The water outlet pipe has a cavity, and the cavity contains a core tube and an inner tube. The inner tube is sleeved outside the core tube and has a first gap between it and the core tube. A second gap is left between the inner tube and the inner wall of the cavity. The core tube has a flow guide hole. The flow guide hole, the first gap, and the second gap are sequentially connected in a meandering manner to form a water passage connecting the water inlet and the water outlet of the water outlet pipe.

[0007] Compared with the prior art, the electric heating safety valve of this utility model has the following advantages: Compared with screwing the anti-electric shock wall and the pressure relief valve together, this utility model integrally molds the water outlet pipe and the pressure relief valve body. On the one hand, it can prevent leakage at the connection between the two, improving the safety and reliability of the electric water heater valve; on the other hand, it eliminates the need for threading at the connection, which not only simplifies the processing process and reduces production costs, but also facilitates subsequent installation and improves assembly efficiency. Secondly, by setting an inner pipe and a core pipe passing through the inner pipe in the water outlet pipe, and using the guide hole in the core pipe, the first gap between the core pipe and the inner pipe, and the second gap between the inner pipe and the inner wall of the water outlet pipe to form a meandering water path connecting the inlet and outlet of the water outlet pipe, it can effectively extend the distance of water flow from the inlet to the outlet of the water outlet pipe, increase the water resistance, and thus reduce the current in the water flow in the event of leakage or short circuit in the electric water heater, effectively ensuring user safety.

[0008] In one embodiment, the inner tube has a closed end and an open end at its two ends, respectively. The inner tube is sleeved on the outside of the core tube through the open end. The first gap includes a first sub-gap and a second sub-gap. The first sub-gap is defined between the outer peripheral wall of the core tube and the inner peripheral wall of the inner tube. The second sub-gap is defined between the end of the core tube near the closed end and the closed end. The flow guide hole is connected to the first sub-gap through the second sub-gap.

[0009] In one embodiment, one of the inner peripheral wall of the inner tube and the outer peripheral wall of the core tube is provided with a positioning protrusion, which abuts against the other and extends along the axial direction of the outlet pipe.

[0010] In one embodiment, there are multiple positioning protrusions, which are spaced apart circumferentially along the water outlet pipe, and the first sub-gap is defined between two adjacent positioning protrusions.

[0011] In one embodiment, the outer peripheral wall of the inner tube near the open end is provided with a first notch, and the first sub-gap communicates with the second gap through the first notch.

[0012] In one embodiment, one of the outer peripheral wall of the inner tube and the inner peripheral wall of the cavity is provided with a guide groove extending axially along the outlet pipe, the guide groove defining the second gap.

[0013] In one embodiment, a second notch is formed between the closed end and the outlet of the water outlet pipe, and the guide channel is connected to the outlet of the water outlet pipe through the second notch; in the axial direction of the water outlet pipe, the first notch, the guide channel and the second notch are positioned correspondingly.

[0014] In one embodiment, a mounting base is connected to one end of the core tube near the open end, the outer peripheral wall of the mounting base abuts against the inner peripheral wall of the cavity, and the open end of the inner tube abuts against the mounting base;

[0015] And / or, a fixing cap is also connected to the outside of the closed end, the fixing cap is located in the cavity and has a second notch that connects the second gap and the outlet of the water outlet pipe.

[0016] In one embodiment, the pressure relief valve body is made of plastic or metal.

[0017] The second technical problem mentioned above is solved by the following technical solution:

[0018] An electric water heater includes a water heater body and the aforementioned electric heating safety valve, wherein the water inlet of the water heater body is connected to the water outlet of the water outlet pipe.

[0019] Compared with the prior art, the electric water heater described in this utility model has the following advantages: Compared with existing electric water heaters, the electric water heater equipped with the aforementioned electric heating safety valve not only has lower production costs and is easier to install, but also reduces the possibility of leakage during subsequent use. Specifically, because the electric heating safety valve of this utility model adopts an integrated molding process, compared with the current method of first screwing the anti-electric shock wall to the inlet of the electric water heater and then screwing the pressure relief valve to the anti-electric shock wall, the installation of the electric heating safety valve of this utility model can reduce one pipe thread connection process, making installation more convenient and reducing the risk of leakage during subsequent use. Furthermore, since the outlet pipe and the pressure relief valve body are integrally molded, it also reduces the need for thread processing at two connection points, simplifying the manufacturing of the electric heating safety valve while enhancing its structural strength. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the structure of an electrothermal safety valve according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 The diagram shown is an exploded schematic of an electric heating safety valve.

[0023] Figure 3 for Figure 1 A cross-sectional schematic diagram of the electric heating safety valve shown;

[0024] Figure 4 for Figure 3 A schematic diagram of the core tube structure;

[0025] Figure 5 for Figure 3 A schematic diagram of the inner tube.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Outlet pipe; 101. Cavity; 102. Outlet; 2. Pressure relief valve body; 3. Core tube; 301. Guide hole; 302. Positioning protrusion; 4. Inner tube; 401. Closed end; 402. Open end; 4021. First notch; 403. Guide groove; 5. First gap; 501. First sub-gap; 502. Second sub-gap; 6. Second gap; 7. Mounting base; 8. Fixing cap; 801. Second notch. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application 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 application.

[0030] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0033] According to embodiments of the present invention, on the one hand, such as Figures 1 to 3 As shown, an electric heating safety valve is provided, including an integrally formed water outlet pipe 1 and a pressure relief valve body 2. The water outlet pipe 1 is provided with a cavity 101, and the cavity 101 is provided with a core tube 3 and an inner tube 4. The inner tube 4 is sleeved outside the core tube 3 and a first gap 5 is left between the inner tube 4 and the inner wall of the cavity 101. A second gap 6 is left between the inner tube 4 and the inner wall of the cavity 101. The core tube 3 is provided with a guide hole 301. The guide hole 301, the first gap 5 and the second gap 6 are sequentially connected in a meandering manner to form a water passage connecting the water inlet and the water outlet 102 of the water outlet pipe 1.

[0034] Compared to screwing the anti-electric shock wall and the pressure relief valve together, this embodiment integrates the outlet pipe 1 and the pressure relief valve body 2 into a single piece. This prevents leakage at the connection point, improving the safety and reliability of the electric water heater. Furthermore, it eliminates the need for threading at the connection, simplifying the manufacturing process, reducing production costs, and facilitating subsequent installation and improving assembly efficiency. Secondly, by installing an inner pipe 4 and a core pipe 3 within the inner pipe 4, and utilizing the guide hole 301 within the core pipe 3, the first gap 5 between the core pipe 3 and the inner pipe 4, and the second gap 6 between the inner pipe 4 and the inner wall of the outlet pipe 1 to form a meandering waterway connecting the inlet and outlet 102 of the outlet pipe 1, the distance the water travels from the inlet to the outlet 102 of the outlet pipe 1 is effectively extended. This increases the water resistance, thereby reducing the current in the water flow in the event of leakage or short circuit in the electric water heater, effectively ensuring user safety.

[0035] It is understood that the outlet 102 of the pressure relief valve body 2 in this embodiment is interconnected with the inlet of the outlet pipe 1. Therefore, the electric heating safety valve in this embodiment can integrate the functions of an anti-electric shock wall and a pressure relief valve. In other words, the electric heating safety valve in this embodiment can not only reduce the current in the water flow and ensure user safety in the event of an electric water heater leakage or short circuit, but also use the internal and external drainage functions of the pressure relief valve to keep the water pressure within the rated pressure range, ensuring that the inner tank of the electric water heater is not damaged by high pressure.

[0036] It should be noted that the shape and extension direction of the guide hole 301 in this embodiment can be flexibly designed according to actual design needs, as long as the water flow can flow inside the core tube 3 and smoothly flow into the first gap 5 after exiting the core tube 3. This utility model does not impose any special limitations on this. Similarly, the first gap 5 and the second gap 6 can also be flexibly designed according to actual design needs, as long as the guide hole 301, the first gap 5 and the second gap 6 together form a meandering water path.

[0037] In one specific embodiment, according to the appendix Figure 3 It can be seen that the guide hole 301 is cylindrical and coaxially arranged with the core tube 3; the inner tube 4 and the outlet pipe 1 are sequentially sleeved on the outside of the inner tube 4 and coaxially arranged with the core tube 3. When the electric heating safety valve of this embodiment is in working state, the flow path of the water inside is as follows: the water flows into the interior of the electric heating safety valve from the inlet of the pressure relief valve, and then flows into the guide hole 301 of the core tube 3 through the outlet 102 of the pressure relief valve and the inlet of the outlet pipe 1, and then flows through the first gap 5 and the second gap 6 in sequence, until it flows out of the electric heating safety valve through the outlet 102 of the outlet pipe 1. It can be seen that the above-mentioned flow path of the water allows the water to flow in a meandering manner in the outlet pipe 1, extending the path of the water from the inlet of the outlet pipe 1 to the outlet 102 of the outlet pipe 1. In this way, when a leakage accident occurs, the water in the flow path can form a large resistance, reduce the charge in the water, and ensure the personal safety of the user.

[0038] In one embodiment, such as Figures 3 to 5As shown, the inner tube 4 has a closed end 401 and an open end 402 at its two ends. The inner tube 4 is fitted onto the outside of the core tube 3 through the open end 402. The first gap 5 includes a first sub-gap 501 and a second sub-gap 502. The first sub-gap 501 is defined between the outer peripheral wall of the core tube 3 and the inner peripheral wall of the inner tube 4. The second sub-gap 502 is defined between the end of the core tube 3 near the closed end 401 and the closed end 401. The guide hole 301 is connected to the first sub-gap 501 through the second sub-gap 502. In this embodiment, setting one end of the inner tube 4 as the open end 402 allows the inner tube 4 to be easily and quickly fitted onto the outer periphery of the core tube 3, reducing the complexity of assembling the inner tube 4 and the core tube 3. Furthermore, setting the other end of the inner tube 4 as a closed section can change the flow direction of the water after it flows out of the guide hole 301, allowing the water to flow smoothly into the first sub-gap 501 through the second sub-gap 502. This extends the flow path of water within the electric heating safety valve.

[0039] In one embodiment, such as Figure 2 As shown, one of the inner circumferential walls of the inner tube 4 and the outer circumferential wall of the core tube 3 is provided with a positioning protrusion 302. The positioning protrusion 302 abuts against the other and extends along the axial direction of the outlet pipe 1. In this embodiment, by providing the positioning protrusion 302, it can ensure that the inner tube 4 and the core tube 3 are in the correct relative position during assembly, avoiding misalignment or displacement during installation, and improving the accuracy and efficiency of assembly. On the other hand, it can form a first sub-gap 501 between the outer circumferential wall of the core tube 3 and the inner circumferential wall of the inner tube 4, ensuring that water can flow between them.

[0040] In one embodiment, such as Figure 2 As shown, there are multiple positioning protrusions 302, which are spaced apart along the circumference of the outlet pipe 1 on the outer peripheral wall of the core tube 3, and a first sub-gap 501 is defined between two adjacent positioning protrusions 302. Compared with a single positioning protrusion 302, multiple positioning protrusions 302 can constrain and position the relative positions of the two from multiple positions, reducing the probability of relative displacement under the impact of water flow. In addition, since there are multiple positioning protrusions 302 on the periphery of the core tube 3, there are also multiple first sub-gap 501. In this way, even if one of the first sub-gap 501 is blocked by foreign objects during use, the remaining first sub-gap 501 can still remain open, thereby ensuring that the water flow can continue and stably flow between the inner tube 4 and the core tube 3, maintaining the basic water flow performance of the outlet pipe 1, and avoiding the failure of the entire water flow channel due to blockage of a single flow channel.

[0041] In one embodiment, such as Figures 3 to 5As shown, a first notch 4021 is provided on the outer peripheral wall of the inner tube 4 near the open end 402, and the first sub-gap 501 is connected to the second gap 6 through the first notch 4021. In this embodiment, the first notch 4021 is provided on the outer peripheral wall of the inner tube 4 near the open end 402, which can extend the flow path of water in the first sub-gap 501 to a certain extent. Secondly, by using the first notch 4021 to connect the first sub-gap 501 and the second gap 6, water can flow smoothly from the first sub-gap 501 into the second gap 6, ensuring the smooth flow of water in the drain pipe.

[0042] It should be noted that the number of first notches 4021 can be one or more, as long as it ensures that the first sub-gap 501 can be connected to the second gap 6 through the first notch 4021. For example, the number of first notches 4021 can be multiple, and multiple first notches 4021 are set in a one-to-one correspondence with multiple first sub-gap 501.

[0043] In one embodiment, such as Figure 2 and Figure 3 As shown, one of the outer peripheral wall of the inner tube 4 and the inner peripheral wall of the cavity 101 is provided with a guide groove 403 extending along the axial direction of the outlet pipe 1, and the guide groove 403 defines the second gap 6. In this embodiment, by setting the guide groove 403, the water flow can be made to flow in a preset direction, ensuring the orderly flow of water in the outlet pipe 1.

[0044] In a specific embodiment, such as Figure 2 As shown, the guide groove 403 is located on the outer peripheral wall of the inner tube 4, and there are multiple guide grooves 403.

[0045] In one embodiment, such as Figure 3 and Figure 5 As shown, a second notch 801 is formed between the closed end 401 and the outlet 102 of the water outlet pipe 1. The guide channel 403 is connected to the outlet 102 of the water outlet pipe 1 through the second notch 801. In the axial direction of the water outlet pipe 1, the first notch 4021, the guide channel 403, and the second notch 801 are positioned correspondingly. It can be understood that the water flow in the water outlet pipe 1 will change its original flow direction at the first notch 4021 and the second notch 801, so that the water flow can flow from the first sub-gap 501 into the guide channel 403 or out of the guide channel 403. Therefore, in this embodiment, keeping the positions of the first notch 4021, the guide channel 403, and the second notch 801 corresponding helps to reduce the resistance of water flow, so that the water flow can continuously and smoothly flow from the first sub-gap 501 into the guide channel 403 or out of the guide channel 403.

[0046] It should be noted that the second notch 801 can be formed by additional structural means or by part of the structure of the closed end 401 of the inner tube 4. In this respect, the embodiments of this utility model will not be described in detail.

[0047] In one embodiment, such as Figures 2 to 4 As shown, a mounting base 7 is connected to one end of the core tube 3 near the open end 402. The outer peripheral wall of the mounting base 7 abuts against the inner peripheral wall of the cavity 101, and the open end 402 of the inner tube 4 abuts against the mounting base 7. Alternatively, a fixing cap 8 is also connected to the outer side of the closed end 401. The fixing cap 8 is located inside the cavity 101 and has a second notch 801 connecting the second gap 6 and the outlet 102 of the outlet pipe 1. By providing a mounting base 7 that abuts against the open end 402 of the inner tube 4, the length of the core tube 3 extending into the inner tube 4 can be limited, ensuring that the end of the core tube 3 near the closed end 401 can define a second sub-gap 502 between it and the closed end 401. Optionally, the fixing cap 8 is press-fitted against the inner peripheral wall of the cavity 101. Optionally, a sealing ring is provided between the mounting base 7 and the inner peripheral wall of the cavity 101.

[0048] In one embodiment, the pressure relief valve body 2 is made of either plastic or metal. It is understood that using plastic to manufacture the pressure relief valve body 2 not only reduces the weight of the electric heating safety valve but also lowers its manufacturing cost. Using metal to manufacture the pressure relief valve body 2 increases its strength, enabling it to withstand greater pressure and ensuring it does not deform or break during prolonged use, thus extending its service life.

[0049] According to an embodiment of the present invention, another aspect provides an electric water heater, including a water heater body and the aforementioned electric heating safety valve, wherein the water inlet of the water heater body is connected to the water outlet 102 of the water outlet pipe 1.

[0050] Compared to existing electric water heaters, water heaters equipped with the aforementioned electric heating safety valve not only have lower production costs and are easier to install, but also have a reduced likelihood of leakage during subsequent use. Specifically, because the electric heating safety valve in this embodiment uses a one-piece molding process, compared to the current method of first screwing the anti-electric shock wall to the water heater inlet and then screwing the pressure relief valve to the anti-electric shock wall, the installation of the electric heating safety valve in this embodiment can reduce one pipe thread connection process, making installation more convenient and reducing the risk of leakage during subsequent use. In addition, since the outlet pipe 1 and the pressure relief valve body 2 are integrally molded, it can also reduce the thread processing at two connection points, simplifying the manufacturing of the electric heating safety valve while enhancing its structural strength.

[0051] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0052] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electric heating safety valve, characterized in that: The device includes an integrally formed water outlet pipe (1) and a pressure relief valve body (2). The water outlet pipe (1) has a cavity (101) inside. The cavity (101) has a core tube (3) and an inner tube (4). The inner tube (4) is sleeved outside the core tube (3) and has a first gap (5) between it and the core tube (3). The inner tube (4) has a second gap (6) between it and the inner wall of the cavity (101). The core tube (3) has a guide hole (301). The guide hole (301), the first gap (5) and the second gap (6) are connected in a meandering manner to form a water passage connecting the water inlet and the water outlet (102) of the water outlet pipe (1).

2. The electrothermal safety valve according to claim 1, characterized in that: The inner tube (4) has a closed end (401) and an open end (402) at its two ends respectively. The inner tube (4) is sleeved on the outside of the core tube (3) through the open end (402). The first gap (5) includes a first sub-gap (501) and a second sub-gap (502). The first sub-gap (501) is defined between the outer peripheral wall of the core tube (3) and the inner peripheral wall of the inner tube (4). The second sub-gap (502) is defined between the end of the core tube (3) near the closed end (401) and the closed end (401). The guide hole (301) is connected to the first sub-gap (501) through the second sub-gap (502).

3. The electrothermal safety valve according to claim 2, characterized in that: The inner circumferential wall of the inner tube (4) and the outer circumferential wall of the core tube (3) are provided with a positioning protrusion (302), which abuts against the other and extends along the axial direction of the water outlet pipe (1).

4. The electrothermal safety valve according to claim 3, characterized in that: The number of positioning protrusions (302) is multiple, and the multiple positioning protrusions (302) are arranged at intervals along the circumference of the water outlet pipe (1), and the first sub-gap (501) is defined between two adjacent positioning protrusions (302).

5. The electrothermal safety valve according to claim 2, characterized in that: The inner tube (4) has a first notch (4021) on its outer peripheral wall near the open end (402), and the first sub-gap (501) is connected to the second gap (6) through the first notch (4021).

6. The electrothermal safety valve according to claim 5, characterized in that: One of the outer peripheral wall of the inner tube (4) and the inner peripheral wall of the cavity (101) is provided with a guide groove (403) extending axially along the outlet pipe (1), and the guide groove (403) defines the second gap (6).

7. The electrothermal safety valve according to claim 6, characterized in that: A second notch (801) is formed between the closed end (401) and the outlet (102) of the water outlet pipe (1), and the guide channel (403) is connected to the outlet (102) of the water outlet pipe (1) through the second notch (801); in the axial direction of the water outlet pipe (1), the first notch (4021), the guide channel (403) and the second notch (801) are in corresponding positions.

8. The electrothermal safety valve according to any one of claims 2 to 7, characterized in that: The end of the core tube (3) near the open end (402) is connected to a mounting base (7), the outer peripheral wall of the mounting base (7) abuts against the inner peripheral wall of the cavity (101), and the open end (402) of the inner tube (4) abuts against the mounting base (7). And / or, a fixing cap (8) is also connected to the outside of the closed end (401), the fixing cap (8) is located in the cavity (101) and is provided with a second notch (801) that connects the second gap (6) and the outlet (102) of the water outlet pipe (1).

9. The electrothermal safety valve according to any one of claims 1 to 7, characterized in that: The pressure relief valve body (2) is made of plastic or metal.

10. An electric water heater, characterized in that: It includes a water heater body and an electric heating safety valve according to any one of claims 1 to 9, wherein the water inlet of the water heater body is connected to the water outlet (102) of the water outlet pipe (1).

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