Electric water heater plastic anti-electricity protection device and method

Abstract

This invention discloses a plastic anti-electric shock protection device and method for electric water heaters, relating to the technical field of electric water heater safety protection equipment. The invention includes an anti-electric shock wall, an active anti-electric shock mechanism, and a fixing plate. The active anti-electric shock mechanism and the fixing plate are both fixed to the outside of the anti-electric shock wall. The anti-electric shock wall includes an upper connector and a lower connector. The upper end of the upper connector is connected to and fixedly connected to a water inlet pipe, and a notch is opened in the middle of the water inlet pipe. The lower end of the lower connector is connected to and fixedly connected to a water outlet pipe. The active anti-electric shock mechanism includes a collar, and a support rod is fixedly connected to one side of the collar. This invention achieves double electrical isolation protection, resulting in a higher safety level. Basic physical electrical isolation is achieved through a long water column in an extended spiral water channel. In the event of leakage, a high-turn coil drives a baffle to automatically cut off the water path, isolating the energized water flow. Furthermore, the entire water-cutting mechanism is not connected to the high-voltage power supply of the water heater, completely isolating strong and weak currents, thus reducing the risk of electric shock with double protection.

Description

Technical Field

[0001] This invention relates to the field of safety protection equipment for electric water heaters, specifically to a plastic anti-electric shock protection device and method for electric water heaters. Background Technology

[0002] Electric water heaters are widely used in households for hot water supply, primarily for daily washing and showering. They are frequently used and suitable for people of all ages. Bathing spaces are typically humid, and the moisture in the air significantly reduces the skin's resistance. If the heating element inside the water heater is damaged or its insulation fails, if there is a fault in the building's grounding circuit, or if there is a short circuit in the external metal water supply network, even a small leakage current can be conducted to the human body through the water, potentially causing electric shock or injury. Therefore, anti-electric shock devices are essential components for ensuring bathing safety. Currently, the industry standard for electric water heaters is the plastic anti-electric shock device, commonly known as an anti-electric shock wall or electric shock isolation wall. This is an independent insulated plastic pipe fitting installed at the inlet and outlet of a storage-type electric water heater.

[0003] Currently, the industry generally uses spiral water channel anti-electric shock walls for safety protection, which rely on lengthening the water flow path to increase the water resistance and achieve passive voltage division and electrical isolation. However, the anti-electric shock wall relies solely on the elongated water column to create high resistance for passive voltage division and isolation. Its protective performance is highly dependent on water quality and operating conditions. In environments with high-hardness water or after long-term use and the accumulation of scale, the conductivity of the water increases significantly, and the water circuit resistance decreases drastically. This causes a sharp decline in the effectiveness of passive voltage division protection, making it impossible to completely cut off the output of electrified water. It can only mitigate the risk of electric shock, resulting in a low safety protection ceiling. Simultaneously, the associated leakage protection and water outlet power-off solutions often rely on electronic chips, relays, and other electrical control components to cut off the heating power of the entire unit. This poses a risk of strong and weak current coupling. In the long-term high-temperature and high-humidity bathroom environment, this can easily cause electronic components to become damp and corrode, leading to signal drift, malfunctions, or failures. Furthermore, it lacks an active leakage warning function, failing to provide timely warnings when the water circuit is abnormally electrified. Users may not be able to detect hidden leakage faults, and continued use of electrified water can easily lead to safety accidents, posing significant usage hazards. To address these issues, the inventor proposes a plastic anti-electric shock protection device and method for electric water heaters. Summary of the Invention

[0004] To address the problems of traditional anti-electric shock walls relying solely on passive voltage division and electrical isolation via extended water columns, where scale and hard water weaken the isolation effect and make it difficult to completely block electrified water flow; and the issues of strong and weak current coupling in electrically controlled power-off devices, which are prone to failure in humid environments, lack of leakage warning, and inability to promptly alert to hidden leakage, resulting in significant safety hazards; the purpose of this invention is to provide an anti-electric shock protection device and method for plastic electric water heaters.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a plastic anti-electric shock protection device for an electric water heater, comprising an anti-electric shock wall, an active anti-electric shock mechanism, and a fixing plate. The active anti-electric shock mechanism and the fixing plate are both fixed to the outside of the anti-electric shock wall. The anti-electric shock wall includes an upper connector and a lower connector. An inlet pipe is fixedly connected to the upper end of the upper connector, and a notch is formed in the middle of the inlet pipe. An outlet pipe is fixedly connected to the lower end of the lower connector. The active anti-electric shock mechanism includes a collar, a support rod is fixedly connected to one side of the collar, and a coil protection housing is fixedly connected to the upper part of one end of the support rod. A high-turn coil is provided in the middle of the coil protection housing and the sliding groove. A sliding groove is formed in the middle of the coil protection housing, and limiters are formed on both sides of the middle of the sliding groove. The sliding groove has an armature guide rod slidably engaged in the middle. Guide blocks are fixed to both sides of the armature guide rod. Lead wires are connected to both ends of the high-turn coil. Metal electrode one and metal electrode two are fixed to the ends of the two lead wires, respectively. A connecting rod is fixed to the end of the armature guide rod. A stop rod is fixed to the end of the connecting rod. A baffle is fixed to the end of the stop rod. Return springs are fixed to both sides of the baffle. A fixed plate is fixed to the outer side of the upper connector. A movable groove is formed in the middle of the fixed plate. The connecting rod, stop rod, and baffle are slidably engaged in the middle of the movable groove. The movable groove is connected to a notch. One end of the return spring is fixed to both sides of the middle of one end of the movable groove. The fixed plate is located at the active anti-motor. Above the structure, the collar is fixed to the outside of the upper connector. Metal electrode one is fixed to one side of the inlet pipe with its detection end located in the middle of the inlet pipe. Metal electrode two is fixed to one side of the outlet pipe with its detection end located in the middle of the outlet pipe. Normally, the baffle is located inside the movable groove offset from the inlet pipe connection point. The baffle can completely block the inlet pipe. The two guide sliders are respectively slidably engaged in the middle of their respective limiting grooves. The baffle and the movable groove are in a sliding seal. A buzzer is fixed above one end of the fixed plate. A battery compartment is fixed to one side of the fixed plate end. Multiple button batteries are located in the middle of the battery compartment. A cover plate is fixed to the end of the battery compartment by screws. A positive wire is fixed to the positive terminal of each button battery. One end of the electrode wire is fixedly connected to the positive terminal of the buzzer, and the negative terminal of the buzzer is fixedly connected to a conductive post. The conductive post passes through the fixed plate and its end is located in the middle of the movable slot. Two fixed metal springs are stacked at the lower end of the conductive post. The negative terminal of the button battery is fixedly connected to a negative electrode wire. The negative electrode wire passes through the fixed plate and its end is located in the middle of the movable slot. A base is fixedly connected to the lower end of the negative electrode wire. A movable metal spring is provided at the upper end of the base. A movable slot is opened on one side of the end of the movable slot. The base is slidably engaged in the middle of the movable slot. A return spring is fixedly connected between one side of the base and the side wall of the movable slot. When the baffle completely blocks the water inlet pipe, the baffle rod will contact the lead wire and push the movable metal spring to move and contact the fixed metal spring.

[0006] Preferably, the upper and lower connectors have multiple interconnected threaded holes evenly distributed around their outer perimeters. Bolts are threaded into the center of each threaded hole. An annular retaining ring is integrally formed in the center of the outer perimeter of the lower connector. An insert is formed in the center of the outer perimeter of the upper connector. The annular retaining ring and the insert are engaged. A sealing ring is engaged in the outer side of the insert, and the sealing ring abuts against the corresponding smooth surface of the lower connector. A recessed spiral rib is integrally formed in the center of the upper connector, and a raised spiral rib is integrally formed in the center of the lower connector. The raised spiral rib and... The concave spiral ribs have the same shape and opening. The middle of the convex and concave spiral ribs is provided with a partition plate. A water outlet is opened on the outer side of the middle of the partition plate. The water outlet is connected to the outer opening of the concave and convex spiral ribs respectively. A water guide plate is fixedly connected to the connection between the water inlet pipe and the upper connector and the connection between the water outlet pipe and the lower connector. The opening of the water guide plate corresponds to the middle opening of the convex and concave spiral ribs respectively. The inner wall of the water inlet pipe is provided with an internal thread groove, and the outer wall of the water outlet pipe is provided with an external thread groove.

[0007] A method for using a plastic anti-electric shock protection device for an electric water heater includes the following steps; S1. Connect the device threaded between the electric water heater and the shower pipe; the upper and lower connectors are engaged with the embedded opening through the ring guard, and the sealing ring seals the joint and then the bolts are tightened; the water flows through the water guide plate into the extended spiral water channel, and the long water column is used to achieve basic electrical isolation. Water can be turned on after the installation is completed. S2. When there is no leakage fault, the first reset spring pulls the baffle into the movable groove of the fixed plate. The baffle and the water inlet of the water pipe are staggered, and the water path is unobstructed throughout. The second reset spring pushes the movable metal spring to keep the fixed metal spring separated. The alarm circuit composed of the button battery and the buzzer is disconnected, the buzzer does not work, the device is in low power standby mode, and the shower head can spray water normally. S3. When the inner tank of the electric water heater leaks electricity or scale buildup causes the anti-electric wall to fail, a potential difference will be formed in the water body at both ends of the water circuit. The metal electrodes in the inlet and outlet pipes form a micro-current loop through the water body and are fed into a high-turns induction coil. The coil generates a magnetic attraction force to drive the armature guide rod to slide smoothly, simultaneously pulling the connecting rod, the stop rod, and the baffle to move forward. The baffle passes through the water inlet and completely blocks the inlet pipe, cutting off the output of the electrified water flow. At the same time, the stop rod presses against the movable metal spring to compress the second reset spring. The movable metal spring and the fixed metal spring are in contact to conduct the alarm circuit, and the buzzer sounds continuously, simultaneously completing the water outage and leakage warning. S4. After the leakage fault is cleared, the coil magnetism disappears, the first reset spring drives the baffle to reset, and the water circuit resumes water flow; the second reset spring drives the metal spring to separate, the alarm circuit is disconnected, the buzzer stops sounding, and the device automatically returns to the standby state without manual reset.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention can achieve double electrical isolation protection, with a higher safety level. It relies on the long water column of the extended spiral water channel to achieve basic physical electrical isolation. In case of leakage, the baffle can be driven by a high-turn coil to automatically cut off the water circuit, preventing the outflow of electrified water. Moreover, the entire water-cutting mechanism is not connected to the strong power of the water heater, and the strong and weak electricity are completely isolated, reducing the risk of electric shock with double protection. 2. This invention features a mechanically linked integrated alarm system that is stable and durable. It employs a mechanical touch-type alarm triggering structure, eliminating the need for an electronic control chip and resulting in a low failure rate. Powered by a button battery, it can sound an alarm even with slight leakage. After the fault is cleared, the sealing and alarm structure automatically resets using dual springs, requiring no manual operation. This makes disassembly and maintenance convenient and highly versatile. 3. This invention integrates the electric water circuit, electromagnetic water shut-off mechanism, and mechanical alarm structure into one compact and small overall structure. It can be adapted to the piping of most storage-type electric water heaters through the standard thread structure. At the same time, it is equipped with a guide limit, sliding seal, and double spring reset structure to avoid transmission jamming, water leakage, and long service life. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the first external structure of the present invention; Figure 2 This is a schematic diagram of the second appearance structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the anti-electric shock wall of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the upper connector in this invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the lower connector in this invention; Figure 6 This is a cross-sectional view showing the connection relationship between the upper connector and the fixing plate in this invention; Figure 7 This is a cross-sectional disassembly diagram showing the connection relationship between the fixing plate and the water inlet pipe in this invention; Figure 8 This is a schematic cross-sectional view of the active anti-electric shock mechanism in this invention; Figure 9 This is a three-dimensional structural diagram of the active anti-electric shock mechanism in this invention.

[0011] In the diagram: 1. Anti-electric shock wall; 101. Upper connector; 102. Lower connector; 103. Embedded opening; 104. Sealing ring; 105. Circular enclosure; 106. Screw hole; 107. Bolt; 108. Raised spiral rib; 109. Recessed spiral rib; 1010. Water inlet pipe; 1011. Water outlet pipe; 1012. Water guide plate; 1013. Divider plate; 1014. Water outlet; 1015. Internal thread groove; 1016. External thread groove; 2. Active anti-electric shock mechanism; 201. Collar; 202. Support rod; 203. Coil protective housing; 204. High-turn coil; 205. Sliding groove; 206. Limiting groove; 207. Armature guide rod; 208. Guide slider; 209. Connecting rod; 2010. Stop bar; 2011. Baffle; 2011. Return spring one; 2012. Lead wire; 2013. Metal electrode one; 2014. Metal electrode two; 3. Fixing plate; 301. Movable slot; 302. Notch; 303. Buzzer; 304. Battery compartment; 305. Cover plate; 306. Button battery; 307. Positive wire; 308. Conductive post; 309. Fixed metal spring; 3010. Negative wire; 3011. Movable metal spring; 3012. Base; 3013. Moving slot; 3014. Return spring two. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Example: Figure 1-9As shown, the present invention provides a technical solution: a plastic anti-electric shock protection device for an electric water heater, comprising an anti-electric shock wall 1, an active anti-electric shock mechanism 2, and a fixing plate 3. The active anti-electric shock mechanism 2 and the fixing plate 3 are both fixed to the outside of the anti-electric shock wall 1. The anti-electric shock wall 1 includes an upper connector 101 and a lower connector 102. The upper end of the upper connector 101 is connected to and fixedly connected to a water inlet pipe 1010. A notch 302 is opened in the middle of the water inlet pipe 1010. The lower end of the lower connector 102 is connected to and fixedly connected to a water outlet pipe 1011. The active anti-electric shock mechanism 2 includes a collar 201. A support rod 202 is fixedly connected to one side of the collar 201. A coil protection housing 203 is fixedly connected to the upper part of one end of the support rod 202. A high-turn coil 204 is provided in the middle of the coil protection housing 203 and the sliding groove 205. A sliding groove 205 is opened in the middle of the coil protection housing 203. Limit grooves 206 are opened on both sides of the middle of the sliding groove 205. An armature guide rod 207 is slidably engaged in the middle of component 5. Guide blocks 208 are fixed to both sides of the armature guide rod 207. Lead wires 2012 are connected to both ends of the high-turn coil 204. Metal electrode 1 2013 and metal electrode 2014 are fixed to the ends of the two lead wires 2012, respectively. A connecting rod 209 is fixed to the end of the armature guide rod 207. A stop rod 2010 is fixed to the end of the connecting rod 209. A baffle is fixed to the end of the stop rod 2010. 2011, both sides of the end of the baffle 2011 are fixedly connected with a return spring 2111, the outer side of the upper connector 101 is fixedly provided with a fixing plate 3, the middle of the fixing plate 3 is provided with a movable groove 301, the connecting rod 209, the stop rod 2010 and the baffle 2011 are all slidably engaged in the middle of the movable groove 301, the movable groove 301 and the notch 302 are connected, and one end of the return spring 2111 is fixedly connected to both sides of the middle of one end of the movable groove 301 respectively; By adopting the above technical solution, the high-turns induction drive structure is integrated and arranged on the outside of the anti-electric wall 1. No external power supply is required. The mechanical water cut-off protection can be triggered by the leakage potential difference of the water body itself. The sliding groove 205 and the limiting groove 206 cooperate to achieve precise linear guidance of the armature guide rod 207, which can effectively prevent the transmission parts from falling off, tilting and jamming. The fixed plate 3 integrates the movable groove 301 and the water passage notch 302. The sealing baffle 2011 can be directly inserted into the pipeline to achieve rapid flow cut-off. The water is automatically turned on after the fault is cleared by the reset spring. There is no need for manual reset, which is convenient to use. The whole system relies on the physical isolation of the water circuit to achieve electric shock prevention. There is no need to link the water heater's high-voltage switch. The water circuit protection component is completely isolated from the power supply circuit of the whole machine. There is no risk of strong and weak current interconnection. It is compatible with the universal installation of various storage-type electric water heaters.

[0014] The fixed plate 3 is located above the active anti-electric mechanism 2. The collar 201 is fixed to the outside of the upper connector 101. The first metal electrode 2013 is fixed to one side of the inlet pipe 1010 and the detection end is located in the middle of the inlet pipe 1010. The second metal electrode 2014 is fixed to one side of the outlet pipe 1011 and the detection end is located in the middle of the outlet pipe 1011. Under normal conditions, the baffle 2011 is located inside the movable groove 301 that is offset from the connection point of the inlet pipe 1010. The baffle 2011 can completely block the inlet pipe 1010. The two guide sliders 208 are respectively slidably engaged in the middle of the corresponding limiting grooves 206. The baffle 2010 and the movable groove 301 are in a sliding seal. By adopting the above technical solution, the electrodes are placed at both ends of the inlet and outlet water pipes 1011 to completely collect the potential difference of the entire anti-electric water circuit. Compared with the single-end detection structure, the leakage current identification threshold is more accurate, and even slight leakage current can stably trigger water cut-off protection. The transmission component has a dual structure of slider limit and sliding seal, which not only ensures smooth linear transmission without falling off, but also avoids water leakage problems. It has stronger operational stability under long-term high temperature water immersion conditions. The baffle 2011 is normally hidden and staggered from the water inlet, so it will not reduce the water passage cross section of the pipeline.

[0015] A buzzer 303 is fixedly attached to the top of one end of the fixed plate 3. A battery compartment 304 is fixedly attached to one side of the end of the fixed plate 3. Multiple button batteries 306 are provided in the middle of the battery compartment 304. A cover plate 305 is fixedly attached to the end of the battery compartment 304 by screws. A positive wire 307 is fixedly attached to the positive terminal of the button battery 306. One end of the positive wire 307 is fixedly attached to the positive terminal of the buzzer 303. A conductive post 308 is fixedly attached to the negative terminal of the buzzer 303. The conductive post 308 passes through the fixed plate 3 and its end is located in the middle of the movable groove 301. Two fixing metal springs 309 are stacked at the lower end of the conductive post 308.

[0016] By adopting the above technical solution, the buzzer 303 can emit an alarm sound when there is a leakage. The alarm circuit adopts a passive triggering structure with mechanical contact conduction by the sliding of the sealing baffle 2011, which does not require additional electronic control components, has a simple structure and low failure rate. The alarm system is powered by an independent button battery 306, and does not rely on the weak leakage current of water to drive the sound. It can stably trigger the alarm under slight leakage conditions. The battery compartment 304 is equipped with a screw-locked sealing cover 305, which has excellent waterproof and dustproof performance, which can prevent the moisture in the bathroom from corroding the internal button battery 306 and effectively extend the service life of the power supply components.

[0017] The negative terminal of the button battery 306 is fixedly connected to a negative wire 3010. The negative wire 3010 passes through the fixed plate 3 and its end is located in the middle of the movable groove 301. The lower end of the negative wire 3010 is fixedly connected to a base 3012. The upper end of the base 3012 is provided with a movable metal spring 3011. A movable groove 3013 is opened on one side of the end of the movable groove 301. The base 3012 is slidably engaged in the middle of the movable groove 3013. A reset spring 3014 is fixedly connected between one side of the base 3012 and the side wall of the movable groove 3013. When the baffle 2011 completely blocks the water inlet pipe 1010, the baffle 2010 will contact the lead wire 2012 and push the movable metal spring 3011 to move and contact the fixed metal spring 309.

[0018] By adopting the above technical solution, the negative terminal of the button battery 306 is connected to the movable metal spring 3011 on the base 3012 via the negative wire 3010. The moving groove 3013 limits and guides the base 3012. The second reset spring 3014 can drive the movable metal spring 3011 to automatically reset. Under normal conditions, the movable metal spring 3011 is separated from the fixed metal spring 309, the alarm circuit is disconnected, and power is saved. When leakage occurs, the high-turn coil 204 attracts the armature guide rod 207, which drives the baffle. 2011 blocks the water inlet pipe 1010. At the same time, the stop lever 2010 pushes the movable metal spring 3011 to adhere to the fixed metal spring 309. The button battery 306, buzzer 303 and various conductive parts form a complete circuit. The buzzer 303 sounds an alarm. After the leakage is eliminated, the magnetic force of the coil disappears. The first reset spring 2111 pulls the blocking mechanism to reset. The stop lever 2010 releases the spring, and the second reset spring 3014 drives the spring to separate. The alarm stops. The circuit is switched on and off by mechanical contact, and the triggering is reliable.

[0019] Multiple screw holes 106 are evenly provided around the outer perimeter of the upper connector 101 and the lower connector 102 and are connected to each other. A bolt 107 is threadedly connected to the center of the screw hole 106. An annular retaining wall 105 is integrally formed in the center of the outer perimeter of the lower connector 102. An insert 103 is provided in the center of the outer perimeter of the upper connector 101. The annular retaining wall 105 and the insert 103 are engaged. A sealing ring 104 is engaged on the outer side of the insert 103. The sealing ring 104 and the corresponding smooth surface of the lower connector 102 abut against each other.

[0020] By adopting the above technical solution, the upper connector 101 and the lower connector 102 are positioned and aligned by the annular retaining wall 105 and the insertion port 103, ensuring precise assembly. A sealing ring 104 is added to the outside of the insertion port 103, which fits against the end face of the lower connector 102 to seal the joint gap and prevent water leakage. Interconnected screw holes 106 are opened around both connectors, through which bolts 107 are threaded and locked, securing the upper and lower connectors 102 together. The snap-fit ​​positioning and bolt locking provide double fixation, ensuring a firm connection that is not easy to loosen and facilitating disassembly, assembly, and maintenance.

[0021] The upper connector 101 has a recessed spiral rib 109 integrally formed in the middle, and the lower connector 102 has a raised spiral rib 108 integrally formed in the middle. The raised spiral rib 108 and the recessed spiral rib 109 have the same shape and opening.

[0022] By adopting the above technical solution, the contours and dimensions of the recessed spiral rib 109 of the upper connector 101 and the raised spiral rib 108 of the lower connector 102 are matched. After the upper and lower connectors 102 are fastened together, the raised spiral rib 108 is embedded in the recessed spiral rib 109, forming a continuous and narrow spiral water flow channel, extending the water flow path, and relying on the long water column to form a high resistance to attenuate the leakage current, thereby achieving basic electrical insulation protection.

[0023] A partition plate 1013 is provided in the middle of the raised spiral rib 108 and the recessed spiral rib 109. A water outlet 1014 is opened on the outer side of the middle part of the partition plate 1013. The water outlet 1014 is connected to the outer opening of the recessed spiral rib 109 and the raised spiral rib 108 respectively.

[0024] By adopting the above technical solution, the partition plate 1013 is located between the raised spiral rib 108 and the recessed spiral rib 109, and the water inlet 1014 opened on it connects the spiral channels on both sides, ensuring that the water body travels fully along the extended spiral path, stabilizing and improving the water resistance voltage division and electrical isolation effect, while regulating the water path and ensuring that the water flow is uniform and smooth.

[0025] A water guide plate 1012 is fixedly connected to the connection between the water inlet pipe 1010 and the upper connector 101, as well as the connection between the water outlet pipe 1011 and the lower connector 102. The openings of the water guide plate 1012 correspond to the middle openings of the raised spiral rib 108 and the recessed spiral rib 109, respectively. By adopting the above technical solution, water guide plates 1012 are set at the connection positions of the inlet pipe 1010, the outlet pipe 1011 and the corresponding connector. The water inlet of the water guide plate 1012 is precisely aligned with the water inlet port in the middle of the spiral rib, which can guide and gather the water flow entering the anti-electric wall 1, so that the water flow is smoothly and accurately guided into the center of the spiral water channel, avoiding water flow turbulence and deviation. At the same time, the water guide plate 1012 can regulate the water inlet and outlet path, ensuring that the water flow flows orderly along the extended spiral channel formed by the raised spiral rib 108 and the recessed spiral rib 109, avoiding water flow short circuit, and ensuring the water column length and voltage divider resistance stability of the anti-electric wall 1.

[0026] The inner wall of the water inlet pipe 1010 is provided with an internal thread groove 1015, and the outer wall of the water outlet pipe 1011 is provided with an external thread groove 1016.

[0027] By adopting the above technical solution, the inner wall of the water inlet pipe 1010 is provided with an internal thread groove 1015, and the outer wall of the water outlet pipe 1011 is provided with an external thread groove 1016, so that both ends of the anti-electric wall 1 can be connected to the water circuit of the whole machine by threaded connection, which is convenient and reliable for installation. The thread structure is compatible with the standard water heater pipe specifications and has strong versatility.

[0028] A method for using a plastic anti-electric shock protection device for an electric water heater includes the following steps; S1. Connect the device threaded between the electric water heater and the shower pipe; the upper connector 101 and the lower connector 102 are engaged with the embedded opening 103 through the annular barrier 105, and the sealing ring 104 seals the joint and then locks it with the bolt 107; the water flows through the water guide plate 1012 into the extended spiral water channel, and the long water column is used to achieve basic electrical isolation. Water can be turned on after the installation is completed. S2. When there is no leakage fault, the first reset spring 2111 pulls the baffle 2011 into the movable groove 301 of the fixed plate 3. The baffle 2011 and the water inlet 1010 water passage 302 are offset from each other, and the water path is unobstructed throughout. The second reset spring 3014 pushes the movable metal spring 3011 to keep it separated from the fixed metal spring 309. The alarm circuit composed of the button battery 306 and the buzzer 303 is disconnected. The buzzer 303 does not work and the device is in low power standby mode. The shower head can spray water normally. S3. When the inner tank of the electric water heater leaks electricity or scale buildup causes the anti-electric wall 1 to fail, a potential difference will be formed in the water body at both ends of the water circuit. The metal electrodes in the inlet pipe 1010 and outlet pipe 1011 form a micro-current circuit through the water body and pass into the high-turn induction coil. The coil generates a magnetic attraction force to drive the armature guide rod 207 to slide smoothly, and simultaneously pull the connecting rod 209, the stop rod 2010, and the baffle 2011 to move forward. The baffle 2011 passes through the water passage gap 302 and completely blocks the inlet pipe 1010, cutting off the output of the electrified water. At the same time, the stop rod 2010 presses against the movable metal spring 3011 to compress the reset spring 3014. The movable metal spring 3011 and the fixed metal spring 309 are in contact to conduct the alarm circuit, and the buzzer 303 sounds continuously, simultaneously completing the water cut-off and leakage warning. S4. After the leakage fault is cleared, the coil magnetic force disappears, the reset spring 1 2111 drives the baffle 2011 to reset, and the water circuit resumes water flow; the reset spring 2 3014 drives the metal spring to separate, the alarm circuit is disconnected, the buzzer 303 stops sounding, and the device automatically returns to the standby state without manual reset.

[0029] Working Principle: This device is assembled at the inlet and outlet of the electric water heater. The anti-electric shock wall 1 consists of an upper connector 101 and a lower connector 102, which are aligned and locked together by an annular barrier 105 and an embedded opening 103, and secured with bolts 107. A sealing ring 104 ensures a complete seal at the joint, effectively preventing water leakage. The upper and lower connectors 102 are internally fitted with raised spiral ribs 108 and recessed spiral ribs 109, which are connected by a partition plate 1013 with a water inlet 1014 to form a continuous, elongated spiral water flow channel. This, combined with the water guide plates 1012 at the inlet and outlet, regulates the water flow, preventing short circuits and turbulence, significantly extending the water flow path. Basic physical electrical protection is achieved through the high resistance characteristics of the long water column. The inlet and outlet pipes 1011 are respectively equipped with internal and external threaded grooves 1016, allowing direct connection to standard water pipe threads, making assembly and disassembly convenient and highly versatile.

[0030] Under normal operating conditions, the baffle 2011 of the active anti-electric shock mechanism 2 is housed inside the movable groove 301 of the fixed plate 3, offset from the water inlet 302 of the water inlet pipe 1010, without obstructing the water path, allowing water to flow normally through the spiral water channel. The baffle 2010 and the movable groove 301 employ a dynamic sealing structure, ensuring the groove remains sealed during the reciprocating sliding of the baffle 2010, preventing water leakage. This is existing technology and will not be elaborated further. At this time, the movable metal spring 3011 and the fixed metal spring 309 remain separated under the action of the return spring 3014, and the alarm circuit of the buzzer 303, powered by the independent button battery 306, is disconnected, resulting in no power consumption in standby mode. The power wiring structure of the buzzer 303 and the button battery 306 uses existing mature electrical connection technology, and will not be elaborated further. When the electric water heater experiences internal tank leakage or scale buildup causing the anti-electric shock wall 1 to fail, a dangerous potential difference will be generated in the water inside the inlet and outlet pipes 1011. Two sets of metal electrodes arranged inside the inlet and outlet pipes 1011 are threaded and locked into the pre-set mounting holes in the inlet pipe 1010 and outlet pipe 1011. The threaded assembly of the electrodes is sealed with a sealing washer, ensuring precise electrode positioning and secure installation, preventing loosening and displacement, and sealing assembly gaps to prevent water leakage and ensure water circuit tightness and electrode detection accuracy. This assembly method is existing technology and will not be elaborated further. The metal electrode detection end is stably positioned in the center of the water circuit, enabling accurate acquisition of potential signals from both ends. The high-turn coil 204 generates effective magnetic attraction under the influence of a small leakage current, driving the armature guide rod 207 to slide smoothly along the linear guide structure formed by the sliding groove 205 and the limiting groove 206, effectively preventing transmission misalignment and detachment. The armature guide rod 207 synchronously drives the connecting rod 209, the stop rod 2010 and the baffle 2011 to move as a whole, so that the baffle 2011 quickly passes through the water passage 302 and completely blocks the water inlet pipe 1010 channel, cutting off the path of the electrified water body to be transported outward, blocking the risk of electric shock to the human body from the water source, realizing physical water cut-off and electric shock prevention, without the need to link the water heater's high-voltage circuit, and the strong and weak currents are completely isolated, making it safer. While the baffle 2011 blocks the water passage, the baffle 2010 simultaneously pushes the movable metal spring 3011, causing the base 3012 to slide along the moving groove 3013 and compress the reset spring 3014. This causes the movable metal spring 3011 to fit tightly with the fixed metal spring 309, thus connecting the independent alarm circuit consisting of the button battery 306, the buzzer 303, and the conductive spring. The buzzer 303 is powered and continuously sounds, providing real-time warnings to users that there is a leakage fault in the equipment. This alarm structure uses a purely mechanical touch trigger, requiring no electronic control components. It is powered by an independent battery, and can stably alarm even with a weak leakage. Furthermore, the battery compartment 304 is sealed by a screw cover 305, providing excellent waterproof and dustproof capabilities.

[0031] When the leakage fault is eliminated, the water circuit potential difference returns to zero, the magnetic force of the high-turn coil 204 dissipates, the reset spring 2111 pulls the entire sealing transmission mechanism to automatically reset, the baffle 2011 re-offsets the water passage opening 302, and the water circuit resumes normal water flow; at the same time, the baffle 2010 releases the pressure limit on the spring piece, the reset spring 3014 drives the movable metal spring piece 3011 to reset and separate, the alarm circuit is disconnected, the buzzer 303 stops sounding, and the device returns to the normal standby protection state. The reset does not require manual operation, making it convenient to use and stable in operation.

[0032] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A plastic anti-electric shock protection device for an electric water heater, comprising an anti-electric shock wall (1), an active anti-electric shock mechanism (2), and a fixing plate (3), wherein the active anti-electric shock mechanism (2) and the fixing plate (3) are both fixed to the outside of the anti-electric shock wall (1), characterized in that: The anti-electric shock wall (1) includes an upper connector (101) and a lower connector (102). The upper end of the upper connector (101) is connected to and fixed with a water inlet pipe (1010). A notch (302) is opened in the middle of the water inlet pipe (1010). The lower end of the lower connector (102) is connected to and fixed with a water outlet pipe (1011). The active anti-electric shock mechanism (2) includes a collar (201). A support rod (202) is fixedly connected to one side of the collar (201). The support rod (202)... A coil protective housing (203) is fixedly connected to the upper part of the end. A high-turn coil (204) is provided in the middle of the coil protective housing (203) and the sliding groove (205). A sliding groove (205) is opened in the middle of the coil protective housing (203). Limiting grooves (206) are opened on both sides of the middle of the sliding groove (205). An armature guide rod (207) is slidably engaged in the middle of the sliding groove (205). Guide sliders (206) are fixedly connected to both sides of the armature guide rod (207). 8) Both ends of the high-turns coil (204) are connected to leads (2012). The ends of the two leads (2012) are respectively fixed to metal electrode one (2013) and metal electrode two (2014). The end of the armature guide rod (207) is fixed to a connecting rod (209). The end of the connecting rod (209) is fixed to a stop rod (2010). The end of the stop rod (2010) is fixed to a baffle (2011). Both sides of the end of the baffle (2011) are... A return spring (2111) is fixedly connected to the upper connector (101). A fixing plate (3) is fixedly provided on the outer side of the upper connector (101). A movable groove (301) is provided in the middle of the fixing plate (3). The connecting rod (209), the stop rod (2010) and the baffle (2011) are all slidably engaged in the middle of the movable groove (301). The movable groove (301) and the notch (302) are connected. One end of the return spring (2111) is fixedly connected to both sides of the middle of one end of the movable groove (301).

2. The electric water heater plastic anti-electric shock protection device as described in claim 1, characterized in that, The fixed plate (3) is located above the active anti-electric mechanism (2). The collar (201) is fixed to the outside of the upper connector (101). The first metal electrode (2013) is fixed to one side of the inlet pipe (1010) and the detection end is located in the middle of the inlet pipe (1010). The second metal electrode (2014) is fixed to one side of the outlet pipe (1011) and the detection end is located in the middle of the outlet pipe (1011). Under normal conditions, the baffle (2011) is located inside the movable groove (301) which is offset from the connection point of the inlet pipe (1010). The baffle (2011) can completely block the inlet pipe (1010). The two guide sliders (208) are respectively slidably engaged in the middle of the corresponding limiting groove (206). The baffle (2010) and the movable groove (301) are in a sliding seal.

3. The electric water heater plastic anti-electric shock protection device as described in claim 1, characterized in that, A buzzer (303) is fixedly connected to the top of one end of the fixed plate (3). A battery compartment (304) is fixedly connected to one side of the end of the fixed plate (3). A plurality of button batteries (306) are provided in the middle of the battery compartment (304). A cover plate (305) is fixedly connected to the end of the battery compartment (304) by screws. A positive wire (307) is fixedly connected to the positive terminal of the button battery (306). One end of the positive wire (307) is fixedly connected to the positive terminal of the buzzer (303). A conductive post (308) is fixedly connected to the negative terminal of the buzzer (303). The conductive post (308) penetrates the fixed plate (3) and its end is located in the middle of the movable groove (301). Two fixed metal springs (309) are stacked at the lower end of the conductive post (308).

4. The electric water heater plastic anti-electric shock protection device as described in claim 3, characterized in that, The negative terminal of the button battery (306) is fixedly connected to a negative electrode wire (3010). The negative electrode wire (3010) passes through the fixed plate (3) and its end is located in the middle of the movable slot (301). The lower end of the negative electrode wire (3010) is fixedly connected to a base (3012). The upper end of the base (3012) is provided with a movable metal spring (3011). A movable slot (3013) is opened on one side of the end of the movable slot (301). The base (3012) is slidably engaged in the middle of the moving groove (3013). A reset spring (3014) is fixed between one side of the base (3012) and the side wall of the moving groove (3013). When the baffle (2011) completely blocks the water inlet pipe (1010) from the opening, the baffle (2010) will contact the lead wire (2012) and push the movable metal spring (3011) to move and contact the fixed metal spring (309).

5. The electric water heater plastic anti-electric shock protection device as described in claim 4, characterized in that, The upper connector (101) and the lower connector (102) are provided with a plurality of screw holes (106) evenly distributed around their outer perimeter and connected to each other. A bolt (107) is threaded into the middle of the screw hole (106). An annular retaining wall (105) is integrally formed in the middle of the outer perimeter of the lower connector (102). An insert (103) is provided in the middle of the outer perimeter of the upper connector (101). The annular retaining wall (105) and the insert (103) are engaged. A sealing ring (104) is engaged in the outer perimeter of the insert (103). The corresponding smooth surfaces of the sealing ring (104) and the lower connector (102) abut against each other.

6. The electric water heater plastic anti-electric shock protection device as described in claim 5, characterized in that, The upper connector (101) has a recessed spiral rib (109) integrally formed in the middle, and the lower connector (102) has a raised spiral rib (108) integrally formed in the middle. The raised spiral rib (108) and the recessed spiral rib (109) have the same shape and opening.

7. The electric water heater plastic anti-electric shock protection device as described in claim 6, characterized in that, A partition plate (1013) is provided in the middle of the raised spiral rib (108) and the recessed spiral rib (109). A water outlet (1014) is opened on the outer side of the middle of the partition plate (1013). The water outlet (1014) is connected to the outer opening of the recessed spiral rib (109) and the raised spiral rib (108).

8. The electric water heater plastic anti-electric shock protection device as described in claim 7, characterized in that, Water guide plates (1012) are fixedly connected to the connection between the water inlet pipe (1010) and the upper connector (101) and the connection between the water outlet pipe (1011) and the lower connector (102). The openings of the water guide plates (1012) correspond to the middle openings of the raised spiral ribs (108) and the recessed spiral ribs (109), respectively.

9. The electric water heater plastic anti-electric shock protection device as described in claim 1, characterized in that, The inner wall of the water inlet pipe (1010) is provided with an internal threaded groove (1015), and the outer wall of the water outlet pipe (1011) is provided with an external threaded groove (1016).

10. A method of using a plastic anti-electric shock protection device for an electric water heater as described in any one of claims 1-9, characterized in that, Includes the following steps; S1. Connect the device threadedly between the electric water heater and the shower pipe; the upper connector (101) and the lower connector (102) are engaged with the embedded opening (103) through the annular enclosure (105), and the sealing ring (104) seals the joint and is then locked with bolts (107); the water flows through the water guide plate (1012) into the extended spiral water channel, and the basic electrical isolation is achieved by relying on the long water column. Water can be turned on after the installation is completed. S2. When there is no leakage fault, the first reset spring (2111) pulls the baffle (2011) into the movable groove (301) of the fixed plate (3), and the baffle (2011) and the water inlet (1010) water passage opening (302) are offset from each other, and the water path is unobstructed throughout; the second reset spring (3014) pushes the movable metal spring (3011) to keep it separated from the fixed metal spring (309), the alarm circuit composed of button battery (306) and buzzer (303) is disconnected, the buzzer (303) does not work, the device is in low power standby mode, and the shower head can spray water normally; S3. When the inner tank of the electric water heater leaks electricity or scale buildup causes the anti-electric wall (1) to fail, the water at both ends of the water circuit will form a potential difference. The metal electrodes in the inlet pipe (1010) and outlet pipe (1011) will form a micro-current circuit through the water and pass into the high-turn induction coil. The coil generates magnetic attraction force to drive the armature guide rod (207) to slide smoothly, and simultaneously pull the connecting rod (209), the baffle (2010), and the baffle (2011) to move forward. The baffle (2011) passes through the water passage gap (302) to completely block the inlet pipe (1010) and cut off the output of the electrified water flow. At the same time, the baffle (2010) presses against the movable metal spring (3011) to compress the reset spring (3014). The movable metal spring (3011) and the fixed metal spring (309) are in contact to conduct the alarm circuit. The buzzer (303) sounds continuously, and the water cut-off and leakage warning are completed simultaneously. S4. After the leakage fault is eliminated, the magnetic force of the coil disappears, the first reset spring (2111) drives the baffle (2011) to reset, and the water circuit resumes water flow; the second reset spring (3014) drives the metal spring to separate, the alarm circuit is disconnected, the buzzer (303) stops sounding, and the device automatically returns to the standby state without manual reset.

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