Electricity-proof wall device and electric water heater

Abstract

The utility model relates to the technical field of electric water heaters, and discloses an electricity guard device and an electric water heater. Wherein one end of the electricity-proof wall device outer pipe is provided with a water outlet, and the other end is provided with a mounting cavity; one end of the sleeve is open, the other end of the sleeve is closed, the sleeve is arranged in the mounting cavity, the closed end of the sleeve faces the water outlet, a first flow channel is defined by the outer wall of the sleeve and the inner wall of the mounting cavity, and the first flow channel communicates with the water outlet; a water inlet is formed in one end of the inner pipe, the inner pipe is inserted into the open end of the sleeve, the water inlet is far away from the closed end of the sleeve, a second flow channel is formed in the inner pipe, a third flow channel is formed between the outer wall of the inner pipe and the inner wall of the sleeve, one end of the third flow channel communicates with the second flow channel, and the other end of the third flow channel communicates with the first flow channel; a flow guide face is arranged at the communicating position of the second flow channel and the third flow channel and / or the communicating position of the third flow channel and the first flow channel. The electricity-proof wall device has smaller influence on the water outlet flow, and the water outlet flow is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater technology, and in particular to an anti-electric shock wall device and an electric water heater. Background Technology

[0002] An anti-electric shock wall for electric water heaters is a safety device used to prevent leakage current generated during the use of electric water heaters from causing harm to the human body. Its working principle is mainly based on using the resistance of the water itself to attenuate and isolate the current, thereby protecting the user's safety.

[0003] The existing anti-electric shock wall structure of electric water heaters is usually achieved by setting up a bent water flow path to increase the resistance of the water itself. However, this method has greater resistance, which will affect the water flow rate of the anti-electric shock wall structure.

[0004] Therefore, there is an urgent need for an anti-electric shock device and an electric water heater to solve the above problems. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide an anti-electric shock wall device that can reduce water resistance and increase water flow while achieving anti-electric shock.

[0006] The second technical problem solved by this utility model is to provide an electric water heater that can reduce water resistance and increase water flow while achieving anti-electric shock properties.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] An anti-electric shock wall device, characterized in that it comprises:

[0009] The outer pipe has a water outlet at one end and an installation cavity at the other end;

[0010] A sleeve, open at one end and closed at the other, is disposed in the mounting cavity, with the closed end of the sleeve facing the water outlet. The outer wall of the sleeve and the inner wall of the mounting cavity form a first flow channel, which is connected to the water outlet.

[0011] An inner tube has an inlet at one end, which is inserted into the open end of the sleeve, with the inlet away from the closed end of the sleeve. The inner tube contains a second flow channel, and a third flow channel is provided between the outer wall of the inner tube and the inner wall of the sleeve. One end of the third flow channel is connected to the second flow channel, and the other end is connected to the first flow channel.

[0012] A guide surface is provided at the connection point between the second flow channel and the third flow channel, and / or at the connection point between the third flow channel and the first flow channel.

[0013] The anti-electric shock wall device described in this utility model has the following advantages compared with the prior art:

[0014] This invention utilizes an outer pipe, a sleeve, and an inner pipe, with an inlet at one end of the inner pipe and an outlet at one end of the outer pipe. Water flows into the anti-electric shock device through the inlet, then sequentially through a second, third, and first flow channel, finally exiting through the outlet. The bend in the water path formed by the second, third, and first flow channels achieves the anti-electric shock effect, thus protecting user safety. Simultaneously, a guide surface is provided at the water flow bend to reduce flow resistance, thereby minimizing the impact on the water output of the anti-electric shock device. This increases the water output while maintaining the anti-electric shock effect.

[0015] In one embodiment, the inner tube is provided with a mounting flange, which is located circumferentially to the inlet and is sealed to the inner wall of the mounting cavity. The end of the mounting flange facing the outlet is provided with a first arc surface, which serves as the flow guiding surface. The first arc surface is recessed in the direction away from the outlet.

[0016] In one embodiment, the mounting flange is interference-fitted with the inner wall of the mounting cavity, or a sealing ring is provided between the mounting flange and the inner wall of the mounting cavity.

[0017] In one embodiment, the outer wall of the sleeve is provided with three or more ribs along the circumferential direction, the ribs extend along the axial direction of the sleeve, the outer wall of the ribs abuts against the inner wall of the mounting cavity, the mounting cavity is provided with a mounting platform near the inner wall of the outlet, and one end of the rib extends out of the sleeve and abuts against the mounting platform.

[0018] And / or, the inner wall of the sleeve is provided with three or more protrusions along the circumferential direction, the protrusions extend along the axial direction of the sleeve, and the protrusions abut against the outer wall of the inner tube.

[0019] In one embodiment, the open end of the sleeve is provided with a plurality of abutment blocks, which are spaced apart circumferentially and fit against the first arc surface.

[0020] In one embodiment, the inner wall of the closed end of the sleeve is provided with a diversion protrusion, the diversion protrusion is coaxially arranged with the second flow channel, the diversion protrusion is conical, and the smaller end of the diversion protrusion faces the water inlet.

[0021] In one embodiment, the inner wall of the closed end of the sleeve is provided with a second arc surface, the two sides of the second arc surface are respectively connected to the diversion protrusion and the side wall of the sleeve, the second arc surface serves as the flow guiding surface, and the second arc surface is recessed in the direction away from the water inlet.

[0022] In one embodiment, a third arc surface is provided at the end of the inner tube away from the water inlet;

[0023] Alternatively, the outer wall of the closed end of the sleeve is provided with a fourth arc surface.

[0024] In one embodiment, a flared section is provided between the mounting cavity and the outlet, the flared section connecting the first flow channel and the outlet, and the inner diameter of the flared section gradually increases from the outlet toward the mounting cavity.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] An electric water heater includes an anti-electric shock wall device as described in any of the above embodiments.

[0027] Compared with the prior art, the electric water heater described in this utility model has the following beneficial effects:

[0028] The electric water heater of this utility model has the above-mentioned anti-electric shock wall device, which has a certain anti-electric shock function, making it safer for users; at the same time, the anti-electric shock wall device has less impact on the water output. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional view of the anti-electric shock wall device provided in a specific embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the inner tube of the anti-electric shock wall device provided in a specific embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the sleeve of the anti-electric shock wall device provided in a specific embodiment of this utility model;

[0033] Figure 4 This is a schematic diagram of the outer tube of the anti-electric shock wall device provided in a specific embodiment of this utility model.

[0034] Label Explanation:

[0035] 100. Outer pipe; 101. Mounting cavity; 110. Outlet; 120. Mounting platform; 130. Flared section; 140. External thread;

[0036] 200, Sleeve; 201, First Flow Channel; 210, Raised Rib; 211, Abutting Block; 212, Support Foot; 220, Second Arc Surface; 230, Diverting Protrusion; 240, Raised Strip; 260, Fourth Arc Surface;

[0037] 300, Inner pipe; 301, Second flow channel; 302, Third flow channel; 310, Inlet; 320, Mounting flange; 321, First arc surface; 330, Third arc surface. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figures 1-4 As shown, this embodiment provides an anti-electric shock wall device, which includes an outer pipe 100, a guide pipe, and an inner pipe 300. One end of the outer pipe 100 is provided with a water outlet 110, and the other end is provided with an installation cavity 101. A sleeve 200 is open at one end and closed at the other end, and is disposed in the installation cavity 101, with the closed end of the sleeve 200 facing the water outlet 110. The outer wall of the sleeve 200 and the inner wall of the installation cavity 101 form a first flow channel 201, which communicates with the water outlet 110. One end of the inner pipe 300... An inlet 310 is provided, and an inner tube 300 is inserted into the open end of the sleeve 200. The inlet 310 is away from the closed end of the sleeve 200. The inner tube 300 contains a second flow channel 301. A third flow channel 302 is provided between the outer wall of the inner tube 300 and the inner wall of the sleeve 200. One end of the third flow channel 302 is connected to the second flow channel 301, and the other end is connected to the first flow channel 201. A guide surface is provided at the connection position between the second flow channel 301 and the third flow channel 302, and / or at the connection position between the third flow channel 302 and the first flow channel 201.

[0043] By configuring an outer pipe 100, a sleeve 200, and an inner pipe 300, with an inlet 310 at one end of the inner pipe 300 and an outlet 110 at one end of the outer pipe 100, water flows into the anti-electric shock wall device through the inlet 310 and sequentially through the second flow channel 301, the third flow channel 302, and the first flow channel 201, finally exiting the anti-electric shock wall device through the outlet 110. The bend in the water path formed by the second flow channel 301, the third flow channel 302, and the first flow channel 201 achieves the anti-electric shock effect, thereby protecting user safety. Specifically, by setting a guide surface at the water flow bend, the water flow resistance at the bend is reduced, thus minimizing the impact on the water output of the anti-electric shock wall device. This increases the water output of the anti-electric shock wall device while still achieving anti-electric shock protection.

[0044] Furthermore, the inner pipe 300 is provided with a mounting flange 320, which is located circumferentially to the inlet 310 and is sealed to the inner wall of the mounting cavity 101. This sealed connection effectively restricts water seepage at the joint between the inner pipe 300 and the outer pipe 100, preventing leakage from weakening the anti-electric shock barrier effect. For example, the end of the mounting flange 320 facing the outlet 110 is provided with a first arc surface 321, which is recessed away from the outlet 110. This first arc surface 321 serves as a guide surface to facilitate the connection between the third flow channel 302 and the first flow channel 201.

[0045] Optionally, to achieve a sealed connection between the mounting flange 320 and the outer pipe 100, the mounting flange 320 is interference-fitted with the inner wall of the mounting cavity 101, or a sealing ring is provided between the mounting flange 320 and the inner wall of the mounting cavity 101. Alternatively, to further improve the sealing effect, multiple sealing rings may be provided.

[0046] In this embodiment, the outer wall of the sleeve 200 is provided with three or more ribs 210 along the circumferential direction. The ribs 210 extend axially along the sleeve 200, and the outer wall of the ribs 210 abuts against the inner wall of the mounting cavity 101 to ensure radial positioning between the sleeve 200 and the outer tube 100. Further, one end of each rib 210 is provided with an abutment block 211. Multiple abutment blocks 211 are spaced apart circumferentially, and the abutment blocks 211 abut against the first arc surface 321. It is understood that the shape of the abutment block 211 is adapted to the first arc surface 321 to ensure reliable abutment. And / or, the inner wall of the sleeve 200 is provided with three or more protrusions 240 along the circumferential direction. The protrusions 240 extend axially along the sleeve 200 and abut against the outer wall of the inner tube 300 to ensure radial positioning between the sleeve 200 and the inner tube 300. For example, the rib 210, the abutment block 211 and the rib 240 are all provided in a one-to-one correspondence.

[0047] Furthermore, an installation platform 120 is provided on the inner wall of the mounting cavity 101 near the outlet 110, and a support foot 212 is provided at the other end of the rib 210. The support foot 212 abuts against the installation platform 120 to provide a conductive space between the first flow channel 201 and the outlet 110. The rib 210, the abutment block 211, the rib 240, and the support foot 212 are integrally formed. In summary, by providing the rib 210, the rib 240, and the support foot 212 on the sleeve 200, the outer pipe 100, the sleeve 200, and the inner pipe 300 are mutually positioned, and a gap is left between the outer pipe 100, the sleeve 200, and the inner pipe 300 to form a channel for water flow.

[0048] Preferably, the outer pipe 100, the sleeve 200 and the inner pipe 300 are all coaxially arranged, which helps to ensure the uniformity of the circumferential width of the first flow channel 201 and the third flow channel 302, thereby ensuring the uniformity of the water flow.

[0049] In this embodiment, the inner wall of the closed end of the sleeve 200 is provided with a diversion protrusion 230. The diversion protrusion 230 is coaxially arranged with the second flow channel 301. By providing the diversion protrusion 230, the water in the second flow channel 301 is diverted, so that it flows evenly to various circumferential positions of the third flow channel 302. Preferably, the diversion protrusion 230 is conical, and the smaller end of the diversion protrusion 230 faces the inlet 310, thereby reducing water flow resistance while achieving diversion.

[0050] Specifically, the inner wall of the closed end of the sleeve 200 is provided with a second arc surface 220. The two sides of the second arc surface 220 are respectively connected to the diversion protrusion 230 and the side wall of the sleeve 200. The second arc surface 220 serves as a flow guide surface. The second arc surface 220 is concave in the direction away from the inlet 310, so that the water flow in the second flow channel 301 can enter the third flow channel 302 after being guided by the second arc surface 220, resulting in less flow resistance.

[0051] In one embodiment, the outer wall of the closed end of the sleeve 200 is provided with a fourth arc surface 260 to reduce the resistance of the water flow from the first flow channel 201 to the outlet 110. The end of the inner tube 300 away from the inlet 310 is provided with a third arc surface 330 to reduce the resistance of the water flow from the second flow channel 301 to the third flow channel 302.

[0052] Preferably, a flared section 130 is provided between the mounting cavity 101 and the outlet 110 to guide the water flow from the first flow channel 201 to the outlet 110. The flared section 130 connects the first flow channel 201 and the outlet 110, and the inner diameter of the flared section 130 gradually increases from the outlet 110 towards the mounting cavity 101.

[0053] Furthermore, to facilitate the installation of the anti-electric shock device, the outer wall of the water outlet 110 is provided with an external thread 140. By providing the external thread 140, the anti-electric shock device can be integrated as a separate component into the outer casing of the display panel, adapting to the diversified functional needs of electric water heaters. Making the anti-electric shock device a movable module effectively saves space, facilitates the integration of multiple functions of the electric water heater, and also improves aesthetics.

[0054] It is worth noting that the overlap length of the first flow channel 201, the second flow channel 301, and the third flow channel 302 is not less than 90% of the axial length of the mounting cavity 101. This means the water flow path within the anti-electric shock wall device is Z-shaped, making the water flow path approximately three times the length of the anti-electric shock wall, effectively increasing the path length. Combined with the smaller water flow cross-sectional area of ​​the inlet 310 of the anti-electric shock wall device, this helps to increase the resistance through which the current flows, thereby enhancing the anti-electric shock effect of the device.

[0055] This embodiment also discloses an electric water heater, including the anti-electric shock wall device as described in any of the above embodiments. The electric water heater with the above-mentioned anti-electric shock wall device has a certain anti-electric shock function, making it safer for users; at the same time, the anti-electric shock wall device has less impact on the water output.

[0056] 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.

[0057] 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 anti-electric shock wall device, characterized in that, include: The outer pipe (100) has an outlet (110) at one end and an installation cavity (101) at the other end; A sleeve (200) is provided with one end open and the other end closed. The sleeve (200) is provided in the mounting cavity (101), and the closed end of the sleeve (200) faces the outlet (110). The outer wall of the sleeve (200) and the inner wall of the mounting cavity (101) form a first flow channel (201), and the first flow channel (201) is connected to the outlet (110). An inner tube (300) is provided with an inlet (310) at one end. The inner tube (300) is inserted into the sleeve (200), and the inlet (310) is away from the closed end of the sleeve (200). The inner tube (300) contains a second flow channel (301). A third flow channel (302) is provided between the outer wall of the inner tube (300) and the inner wall of the sleeve (200). One end of the third flow channel (302) is connected to the second flow channel (301), and the other end is connected to the first flow channel (201). A guide surface is provided at the connection position between the second flow channel (301) and the third flow channel (302), and / or at the connection position between the third flow channel (302) and the first flow channel (201).

2. The anti-electric shock wall device according to claim 1, characterized in that, The inner tube (300) is provided with a mounting flange (320), which is located around the inlet (310) and is sealed to the inner wall of the mounting cavity (101). The end of the mounting flange (320) facing the outlet (110) is provided with a first arc surface (321), which serves as the flow guide surface. The first arc surface (321) is recessed in the direction away from the outlet (110).

3. The anti-electric shock wall device according to claim 2, characterized in that, The mounting flange (320) is interference-fitted with the inner wall of the mounting cavity (101), or a sealing ring is provided between the mounting flange (320) and the inner wall of the mounting cavity (101).

4. The anti-electric shock wall device according to claim 2, characterized in that, The outer wall of the sleeve (200) is provided with three or more ribs (210) along the circumferential direction. The ribs (210) extend along the axial direction of the sleeve (200). The outer wall of the ribs (210) abuts against the inner wall of the mounting cavity (101). The inner wall of the mounting cavity (101) near the outlet (110) is provided with a mounting platform (120). One end of the ribs (210) extends out of the sleeve (200) and abuts against the mounting platform (120). And / or, the inner wall of the sleeve (200) is provided with three or more protrusions (240) in the circumferential direction, the protrusions (240) extend along the axial direction of the sleeve (200), and the protrusions (240) abut against the outer wall of the inner tube (300).

5. The anti-electric shock wall device according to claim 2, characterized in that, The sleeve (200) has a plurality of abutment blocks (211) at its open end. The plurality of abutment blocks (211) are spaced apart in the circumferential direction and are in contact with the first arc surface (321).

6. The anti-electric shock wall device according to claim 1, characterized in that, The inner wall of the closed end of the sleeve (200) is provided with a diversion protrusion (230), the diversion protrusion (230) is coaxially arranged with the second flow channel (301), the diversion protrusion (230) is conical, and the smaller end of the diversion protrusion (230) faces the inlet (310).

7. The anti-electric shock wall device according to claim 6, characterized in that, The inner wall of the closed end of the sleeve (200) is provided with a second arc surface (220). The two sides of the second arc surface (220) are respectively connected to the diversion protrusion (230) and the side wall of the sleeve (200). The second arc surface (220) serves as the flow guiding surface. The second arc surface (220) is recessed in the direction away from the water inlet (310).

8. The anti-electric shock wall device according to claim 7, characterized in that, The inner tube (300) is provided with a third arc surface (330) at the end away from the water inlet (310); Alternatively, the outer wall of the closed end of the sleeve (200) is provided with a fourth arc surface (260).

9. The anti-electric shock wall device according to any one of claims 1-7, characterized in that, A flared section (130) is provided between the mounting cavity (101) and the outlet (110). The flared section (130) connects the first flow channel (201) and the outlet (110). The inner diameter of the flared section (130) gradually increases from the outlet (110) toward the mounting cavity (101).

10. An electric water heater, characterized in that, Includes the anti-electric shock wall device as described in any one of claims 1-9.

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