Electricity-proof wall device for electric water heater and electric water heater

Abstract

An electricity-proof wall device for an electric water heater comprises an electricity-proof wall body and a pipeline, one end of the electricity-proof wall body is provided with a water inlet and outlet connector, the electricity-proof wall device further comprises a lower flow guide pipe, the other end of the electricity-proof wall body is communicated with the pipeline through the lower flow guide pipe, one end of the lower flow guide pipe is inserted into an inner cavity of the electricity-proof wall body, and the other end of the lower flow guide pipe is communicated with the pipeline. And the other end of the lower flow guide pipe is communicated with the pipeline. Compared with the prior art, the technical scheme provided by the utility model has the advantages of simple structure, few parts, obvious anti-creeping effect, convenience for overhauling and replacing parts, and high safety coefficient.

Description

Technical Field

[0001] The utility model relates to the field of anti-electricity wall devices, in particular to an anti-electricity wall device for an electric water heater and an electric water heater. Background Art

[0002] At present, most electric water heaters on the market use safe care to prevent electric shock and leakage. It uses the electrical resistance of water itself to form an "electricity-blocking wall" by selecting the material, diameter and distance of the water pipe.

[0003] With the continuous development and progress of society, people have also put forward higher requirements for the safety of electric water heaters. Although the current leakage current standards of the electric wall of major domestic electric water heater manufacturers are in line with industry regulations, that is, they are all below 5mA, this standard can still be clearly perceived by the human body and is far from the situation where the human body is insensitive (based on experimental data, the insensitive current of the human body is below 0.5mA). Therefore, it is urgent to develop a product with stronger anti-electricity effect and higher safety factor.

[0004] Among them, for example, the Chinese utility model patent with authorization announcement number CN214223396U, entitled a composite electric water heater with a pre-filter sensor anti-electric wall, discloses: the water inlet inner pipe 10A is made of plastic material; it also includes a joint 3, a water filter 4, a magnetic rotor 5, a Hall sensor 6, an internal thread pipe joint 7, a sealing ring 8 and a retaining ring 9 made of plastic material, the joint 3 includes a water inlet pipe body 31, a water inlet inner interface 32, a water guide interface 33 surrounding the water inlet inner interface and a water outlet pipe body 34, the water inlet pipe body 31 is connected to the water inlet inner interface 32, the water guide interface 33 is connected to the water outlet pipe body 34, the bottom of the water outlet pipe body 34 is provided with an annular seat 341, and the annular seat 341 is provided with a retaining ring groove; the internal thread pipe joint 7 includes an internal thread body 71 and a circular ring end plate 72 ; The sealing ring 8 includes a tube hole 81 located at the upper part, a seat cavity 82 and a sinking hole 83 provided at the lower end of the seat cavity; the magnetic rotor 5 is pivotally connected to the water inlet pipe body 31, and the Hall sensor 6 is provided on the outer surface of the water inlet pipe body 31 and cooperates with the magnetic rotor 5; the water inlet interface 421 of the water filter 4 is connected to the water inlet inner interface 32, and the water outlet interface 411 is connected to the water guide interface 33; the internal thread pipe joint 7 is sleeved on the annular seat 341, the retaining ring 9 is engaged with the retaining ring groove, and the internal thread pipe joint 7 is maintained on the annular seat 341, the sealing ring 8 is sleeved on the annular seat 341, the annular seat 341 is engaged with the seat cavity 82, the retaining ring 9 is located in the sinking hole 83, and the water outlet pipe body 34 extends through the tube hole 81 of the sealing ring 8; the water inlet inner pipe 1 is inserted into the water outlet pipe body 34, and the water outlet pipe body 34 is inserted into the water inlet pipe 2. The water inlet pipe 10B extends into the inner tank 2 through the cold water inlet interface 21, and the cold water inlet interface 21 is screwed with the internal pipe joint 7. In the technical solution of the utility model, the water inlet inner pipe 1 is inserted into the water outlet pipe body 34, but the internal pipe joint 7 is sleeved outside the water outlet pipe body 34, and the cold water inlet interface 21 is screwed with the internal pipe joint 7, wherein the sealing ring 8 is sleeved on the annular seat 341 of the water outlet pipe body 34 and the water outlet pipe body 34 passes through the pipe hole of the sealing ring 8, the structure is complex and the number of parts is large.

[0005] For another example, the Chinese utility model patent for a water inlet pipe for an electric wall with flow detection, with the authorization announcement number CN212481663U, discloses: a hexagonal head 1, a pipe 2 arranged at the upper end of the hexagonal head 1, and an inlet and outlet water joint 3 arranged at the lower end; the hexagonal head 1 is provided with an inner tube cavity 101 connected with the pipe 2, the inner tube cavity 101 extends downward to the bottom of the inlet and outlet water joint 3, a limiting step 102 is provided in the middle of the inner tube cavity 101, a fixed sleeve 4 is provided in the inner tube cavity 101, a magnetic water wheel 5 that can rotate axially is provided in the fixed sleeve 4, and a water guide cover 6 that cooperates with the fixed sleeve 4 and the magnetic water wheel 5 is provided below the fixed sleeve 4. The technical solution described in the utility model does not clearly disclose any connection structure between the hexagonal head 1 and the pipe 2, which is not conducive to maintenance and replacement of accessories.

[0006] For another example, the Chinese utility model patent with the authorization announcement number CN205939725U, entitled "An anti-electricity wall for electric water heater with flow sensor", discloses: including an anti-electricity wall body 1 made of insulating material, a water outlet joint 2 arranged at one end of the anti-electricity wall body 1 for connecting with the electric water heater, and a water outlet pipe 3 arranged at the other end of the anti-electricity wall body 1; a flow sensor chamber 4 is arranged on the anti-electricity wall body 1, a bracket 5 with a mounting hole and an impeller rotor 6 are arranged in the flow sensor chamber 4, one end of the impeller rotor 6 is rotatably mounted on the bracket 5 through the mounting hole, and a Hall element 7 capable of sensing the rotation of the impeller rotor 6 is arranged on the outer wall of the flow sensor chamber 4. The technical solution described in the utility model still does not clearly disclose the connection structure between the anti-electricity wall body 1 and the water outlet pipe 3, which is not conducive to maintenance and replacement of accessories. Utility Model Content

[0007] In view of the deficiencies in the prior art, the utility model provides an anti-electricity wall device for an electric water heater and an electric water heater which have a simple structure, a small number of parts, a significant anti-leakage effect (less than 0.5 mA), are easy to repair and replace parts, and have a high safety factor.

[0008] The utility model mainly adopts the following technical solutions:

[0009] An electric shock wall device for an electric water heater comprises an electric shock wall body and a pipeline, wherein one end of the electric shock wall body is provided with an inlet and outlet water joint, and further comprises a lower flow guide pipe, wherein the other end of the electric shock wall body is connected to the pipeline via the lower flow guide pipe, one end of the lower flow guide pipe is inserted into the inner cavity of the electric shock wall body, and the other end of the lower flow guide pipe is connected to the pipeline.

[0010] Among them, the inner cavity of the anti-electric wall body is provided with a partition plate, the lower guide pipe is fixed on the partition plate by fasteners, the partition plate is also provided with a first water hole, and the lower guide pipe has a second water hole corresponding to the first water hole.

[0011] The inner cavity of the anti-electricity wall body is formed with a stepped limiting support, and the outer wall of the lower flow guide pipe is formed with a limiting protrusion, and the limiting protrusion cooperates with the limiting support.

[0012] Wherein, the pipeline includes an insulating inner tube, the tube cavity of the insulating inner tube forms at least a first branch tube, a second branch tube and a third branch tube in parallel, and the tube cavity of the first branch tube is connected to the second water hole.

[0013] Wherein, it also includes an upper flow guide pipe, the upper flow guide pipe cover is arranged at the other end of the insulating inner tube, the upper flow guide pipe is also provided with a third water passing hole and a first water passing cavity, the first branch pipe is connected with the second branch pipe through the first water passing cavity, the lower flow guide pipe is also provided with a second water passing cavity, the second branch pipe is connected with the third branch pipe through the second water passing cavity, and the third branch pipe is connected with the third water passing hole.

[0014] Wherein, it also includes a lower rubber plug, which is installed between the lower flow guide tube and the insulating inner tube.

[0015] Wherein, a bayonet is provided on the lower guide tube, and a clamping protrusion is provided on the outer wall of the lower rubber plug, and the clamping protrusion cooperates with the bayonet.

[0016] Wherein, it also includes an upper rubber plug, which is arranged between the upper flow guide tube and the insulating inner tube.

[0017] Wherein, the pipeline also includes an outer sleeve, and the outer sleeve is sleeved outside the insulating inner tube.

[0018] A magnetic water wheel is also arranged in the inner cavity of the anti-electricity wall body, an installation box is opened on the outer wall of the anti-electricity wall body, a Hall sensor for sensing the rotation speed of the magnetic water wheel is installed in the installation box, and a cover plate is provided on the installation box.

[0019] An electric water heater uses the above-mentioned anti-electricity wall device for the electric water heater.

[0020] According to the technical scheme described in the utility model, the following beneficial effects are achieved: one end of the lower guide pipe is inserted into the anti-electricity wall body and is arranged on the partition plate through fasteners, so the structure is stable and easy to assemble; the inner cavity of the anti-electricity wall body forms a step-shaped limiting pedestal, which cooperates with the limiting convexity of the lower guide pipe, which can not only limit the lower guide pipe but also play the role of dislocation sealing; the insulating inner pipe forms a plurality of branch pipes, which provides a basis for extending the water path distance, and cooperates with the water flow cavity of the lower guide pipe and the upper guide pipe to lengthen the water path distance, thereby significantly reducing the leakage current. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the anti-electricity wall device of the present application when used in a water inlet pipeline.

[0022] Figure 2 for Figure 1 Schematic diagram of the anti-electric wall device structure after the cover is opened.

[0023] Figure 3 for Figure 1 Explosion diagram of the middle anti-electric wall device.

[0024] Figure 4This is a schematic diagram of the explosion structure when the anti-electric wall device of this application is used in the water outlet pipeline.

[0025] Figure 5 for Figure 1 Schematic diagram of the cross-section structure of the anti-electric wall.

[0026] Figure 6 This is a schematic diagram of the upper guide tube viewed from above.

[0027] 1 anti-electric wall body, 10 partition plate, 100 first water hole, 11 water inlet and outlet joints, 12 limit bearing platform, 13 installation box, 2 pipeline, 21 insulating inner pipe, 211 first branch pipe, 212 second branch pipe, 213 third branch pipe, 22 outer sleeve, 3 lower guide pipe, 30 second water cavity, 300 second water hole, 31 limit convex, 4 fastener, 5 upper guide pipe, 50 first water cavity, 500 third water hole, 6 lower rubber plug, 7 cover plate, 8 magnetic water wheel. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0029] See also Figures 3 to 5 As shown, an electric shock wall device for an electric water heater includes an electric shock wall body 1 and a pipeline 2. One end of the electric shock wall body 1 is provided with a water inlet and outlet joint 11, and also includes a lower flow guide pipe 3. The other end of the electric shock wall body 1 is connected to the pipeline 2 through the lower flow guide pipe 3. One end of the lower flow guide pipe 3 is inserted into the inner cavity of the electric shock wall body 1, and the other end of the lower flow guide pipe 3 is connected to the pipeline 2. This structural design significantly simplifies the structure of the electric shock wall body, facilitates manufacturers to carry out "split" production and processing, and reduces the difficulty of mold opening.

[0030] See also Figures 3 to 5 As shown, the inner cavity of the anti-electricity wall body 1 is provided with a partition plate 10, and the lower flow guide pipe 3 is fixed on the partition plate 10 by a fastener 4. The partition plate 10 is also provided with a first water hole 100, and the lower flow guide pipe 3 has a second water hole 300 corresponding to the first water hole 100. In the present application, the inner cavity of the anti-electricity wall body is provided with a partition plate with a first water hole to install the lower flow guide pipe, which has a simple structure and is easy to assemble. The setting of the second water cavity provides the necessary conditions for lengthening the water path distance. Preferably, the fastener 4 is a screw.

[0031] See also Figures 3 to 5 As shown, the inner cavity of the anti-electrical wall body 1 is formed with a stepped limiting platform 12, and the outer wall of the lower flow guide pipe 3 is formed with a limiting protrusion 31, and the limiting protrusion 31 cooperates with the limiting platform 12. This structural design, on the one hand, limits the lower flow guide pipe, and on the other hand, can also transfer the gap between the anti-electrical wall body and the lower flow guide pipe through the cooperation of the limiting platform and the limiting protrusion, so as to play a role in sealing and preventing water leakage.

[0032] See also Figures 3 to 5 As shown, the pipeline 2 includes an insulating inner tube 21, and the tube cavity of the insulating inner tube 21 forms at least a first branch tube 211, a second branch tube 212 and a third branch tube 213 in parallel, and the tube cavity of the first branch tube 211 is connected to the second water hole 300. In the present application, the insulating inner tube is designed to include at least three parallel branches (more branches can be designed according to the specific anti-leakage requirements), on the one hand, it is used to lengthen the waterway distance to form an anti-leakage wall through the resistance of water so that the anti-leakage current value is reduced to less than 0.5mA, and on the other hand, the setting of the number of branches will not affect the use of the anti-leakage wall device on the water inlet or outlet pipeline, and the adaptability and flexibility are stronger. Preferably, the at least first branch tube 211, the second branch tube 212 and the third branch tube 213 can be independent of each other or can be integrally formed to facilitate processing and production.

[0033] See also Figures 1 to 6 As shown, it also includes an upper flow guide pipe 5, which is covered on the other end of the insulating inner pipe 21. The upper flow guide pipe 5 is also provided with a third water hole 500 and a first water cavity 50. The first branch pipe 211 is connected to the second branch pipe 212 through the first water cavity 50. The lower flow guide pipe 3 is also provided with a second water cavity 30. The second branch pipe 212 is connected to the third branch pipe 213 through the second water cavity 30, and the third branch pipe 213 is connected to the third water hole 500. In the present application, the waterway can be extended to a degree far greater than the length of the insulating inner pipe by the cooperation between the lower flow guide pipe, the insulating inner pipe and the upper flow guide pipe. Preferably, the lengths of the first branch pipe, the second branch pipe and the third branch pipe are controlled between 20 mm and 800 mm. The anti-leakage effect of the anti-electricity wall formed is very significant, and the leakage current can be controlled below 0.5 mA. In some embodiments, the number of branch pipes can be adjusted accordingly according to the specific anti-leakage requirements.

[0034] See also Figures 3 to 5 As shown, it also includes a lower rubber plug 6, which is installed between the lower flow guide tube 3 and the insulating inner tube 21. In the present application, the lower rubber plug is installed between the lower flow guide tube and the insulating inner tube in an interference fit manner to prevent water leakage. Preferably, the upper end of the lower rubber plug extends out of the lower flow guide tube, and an annular outer edge extending outward is formed at the upper end of the lower rubber plug to play a positioning and buffering role between the insulating inner tube and the outer sleeve.

[0035] See also Figures 3 to 5 As shown, a bayonet is provided on the lower guide pipe 3, and a bayonet is provided on the outer wall of the lower rubber plug 6, and the bayonet matches with the bayonet. This structural design is convenient for workers to assemble.

[0036] Furthermore, it also includes an upper rubber plug, which is arranged between the upper flow guide tube 5 and the insulating inner tube 21. In the present application, the upper rubber plug is installed between the upper flow guide tube and the insulating inner tube in an interference fit manner to prevent water leakage. Preferably, the lower end of the upper rubber plug extends out of the upper flow guide tube, and an annular outer edge extending outward is formed at the lower end of the upper rubber plug to play a positioning and buffering role between the insulating inner tube and the outer sleeve.

[0037] See also Figures 1 to 5 As shown, the pipe 2 also includes an outer sleeve 22, which is sleeved outside the insulating inner pipe 21. Preferably, the outer sleeve is made of stainless steel. Preferably, when the anti-electricity wall device is used in the water inlet pipeline, the outer sleeve 22 forms a plurality of small fins extending outward at one end close to the anti-electricity wall body 1, so as to guide the water in the inner tank of the electric water heater to achieve a laminar flow state; when the anti-electricity wall device is used in the water outlet pipeline, since it is not necessary to form a laminar flow state, the outer periphery of the outer sleeve 22 is no longer formed with small fins, see Figure 4 Preferably, the annular outer edge of the lower rubber plug abuts between the insulating inner tube and the outer sleeve, and forms a sealing effect through interference fit to prevent water leakage. Preferably, the annular outer edge of the upper rubber plug abuts between the insulating inner tube and the outer sleeve, and forms a sealing effect through interference fit to prevent water leakage.

[0038] See also Figure 5 As shown, a magnetic water wheel 8 is also arranged in the inner cavity of the anti-electricity wall body 1, and an installation box 13 is provided on the outer wall of the anti-electricity wall body 1. A Hall sensor for sensing the rotation speed of the magnetic water wheel is installed in the installation box 13, and a cover plate 7 is provided on the installation box 13. Preferably, the magnetic water wheel 8 is located on the other side of the partition plate 10 away from the lower guide pipe.

[0039] See also Figures 1 to 6 As shown, an electric water heater uses the above-mentioned anti-electricity wall device for the electric water heater.

[0040] When in use, the anti-electricity wall device is installed on the water inlet or outlet of the electric water heater, and the Hall sensor is connected to the controller signal of the electric water heater. When the mixing valve is opened, water flows into the water inlet / outlet from the water inlet, pushing the magnetic water wheel 8 in the inner cavity of the anti-electricity wall body 1 to rotate. The Hall sensor converts the speed change of the magnetic water wheel 8 into an electronic signal, and transmits this electronic signal to the controller of the electric water heater. Once the controller receives the signal of water flow, it will quickly cut off the power supply of the heater within about 1.5 microseconds to avoid the problem of accidental leakage of the heater, thereby more effectively protecting the user. After closing the mixing valve, no water flows, and the controller connects the power supply of the heater again to allow it to continue to heat the water in the inner tank. In this case, the controller can control not only the heater, but also any internal equipment that may have leakage, so that when water flows in the water inlet and outlet, the power supply of these equipment that may have leakage or electric shock can be cut off to ensure the safety of the user.

[0041] Although the specific implementation modes of the present invention have been described above, those skilled in the art may modify the present invention without departing from the spirit and principle of the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. An anti-electricity wall device for an electric water heater, comprising an anti-electricity wall body and a pipeline, wherein one end of the anti-electricity wall body is provided with a water inlet and outlet joint, characterized in that: It also includes a lower flow guide pipe, the other end of the anti-electricity wall body is connected to the pipeline through the lower flow guide pipe, one end of the lower flow guide pipe is inserted into the inner cavity of the anti-electricity wall body, and the other end of the lower flow guide pipe is connected to the pipeline; the inner cavity of the anti-electricity wall body is provided with a partition plate, the lower flow guide pipe is fixed to the partition plate by fasteners, the partition plate is also provided with a first water hole, and the lower flow guide pipe has a second water hole corresponding to the first water hole.

2. The anti-electricity wall device for an electric water heater according to claim 1, characterized in that: The inner cavity of the anti-electricity wall body is formed with a stepped limiting support, and the outer wall of the lower flow guide pipe is formed with a limiting protrusion, and the limiting protrusion cooperates with the limiting support.

3. The anti-electricity wall device for an electric water heater according to claim 1 or 2, characterized in that: The pipeline includes an insulating inner tube, the tube cavity of the insulating inner tube forms at least a first branch tube, a second branch tube and a third branch tube in parallel, and the tube cavity of the first branch tube is connected to the second water hole.

4. The anti-electricity wall device for an electric water heater according to claim 3, characterized in that: It also includes an upper flow guide pipe, which is covered at the other end of the insulating inner pipe. The upper flow guide pipe is also provided with a third water passage hole and a first water passage cavity. The first branch pipe is connected to the second branch pipe through the first water passage cavity. The lower flow guide pipe is also provided with a second water passage cavity. The second branch pipe is connected to the third branch pipe through the second water passage cavity. The third branch pipe is connected to the third water passage hole.

5. The anti-electricity wall device for an electric water heater according to claim 3, characterized in that: It also includes a lower rubber plug, which is installed between the lower flow guide tube and the insulating inner tube.

6. The anti-electricity wall device for an electric water heater according to claim 5, characterized in that: The lower guide pipe is provided with a bayonet, and the outer wall of the lower rubber plug is provided with a bayonet protrusion, and the bayonet protrusion matches with the bayonet.

7. The anti-electricity wall device for an electric water heater according to claim 4, characterized in that: It also includes an upper rubber plug, which is arranged between the upper flow guide tube and the insulating inner tube.

8. The anti-electricity wall device for an electric water heater according to any one of claims 4 to 6, characterized in that: The pipeline also includes an outer sleeve, which is sleeved outside the insulating inner tube.

9. The anti-electricity wall device for an electric water heater according to any one of claims 1, 2, 4 to 6, characterized in that: A magnetic water wheel is also arranged in the inner cavity of the anti-electricity wall body, an installation box is opened on the outer wall of the anti-electricity wall body, a Hall sensor for sensing the rotation speed of the magnetic water wheel is installed in the installation box, and a cover plate is provided on the installation box.

10. An electric water heater, characterized in that: Use the anti-electricity wall device for an electric water heater as described in any one of claims 1 to 9.

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