Water shortage protection device for electric water boiler

Abstract

The utility model discloses a kind of electric hot water boiler water shortage protection devices, it is related to electric hot water boiler protection technical field.This kind of electric hot water boiler water shortage protection device, including water heater, the inside of water heater is provided with storage cavity, the inside of storage cavity is movably sleeved with lifting piece, the top of lifting piece is movably sleeved with short-circuit blocking piece and liquid valve switch piece;The lifting piece includes floating plate, rod A, rod B, connecting plug, the inside of storage cavity is movably sleeved floating plate.This kind of electric hot water boiler water shortage protection device, when the liquid of floating plate bottom is exhausted and is moved down by gravity, drives rod A, rod B and connecting plug synchronous motion, makes the internal circuit of insulation box disconnect and form open circuit, can automatically cut off power when liquid is insufficient, effectively avoid equipment dry burning condition to occur, not only guarantee equipment operation safety, prevent element damage due to dry burning, also significantly prolong the service life of equipment, reduce use risk and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater protection technology, specifically to a water shortage protection device for electric water heaters. Background Technology

[0002] An electric water heater is a device that uses electricity to continuously heat and supply boiling water. It is designed to meet daily drinking water needs. Its core is to convert electrical energy into heat energy through a built-in electric heating element, heat the water to a boiling state, and maintain a stable supply. The difference between it and an ordinary electric water heater is that it is mainly designed for drinking water scenarios, emphasizing rapid boiling, water purification, and continuous heat preservation functions.

[0003] If the water inside an existing electric water heater is drained and the plug is not unplugged in time, the heater will continue to run dry. When the heater runs dry for a long time, it is easy to cause damage and reduce the overall lifespan of the machine. Summary of the Invention

[0004] The purpose of this utility model is to provide a water shortage protection device for an electric water heater. By lowering the water level horizontally, the circuit can be effectively isolated, thereby preventing dry burning during operation and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water shortage protection device for an electric water heater, comprising a water heater, wherein the water heater has a storage cavity inside, a lifting component is movably sleeved inside the storage cavity, and a short-circuit blocking component and a liquid valve switch component are movably sleeved on the top of the lifting component; the lifting component includes a floating plate, rod A, rod B, and a connecting plug, the floating plate is movably sleeved inside the storage cavity, and symmetrical rods A and B are fixedly installed on both sides of the top of the floating plate, and connecting plugs are fixedly installed on the top of rods A and B; the short-circuit blocking component includes a pipe B and an isolation box, the top of rod A is movably sleeved with pipe B, and the bottom of pipe B is fixedly connected to the isolation box; the liquid valve switch component includes an inlet pipe, an isolation box, and pipe A, the top of rod B is movably sleeved with pipe A, the bottom of pipe A is fixedly connected to the isolation box, and inlet pipes are fixedly installed on both sides of the isolation box.

[0006] Preferably, the short-circuit isolation component includes a piston A, a copper sheet, a PC tube A, a PC tube B, a connector, a rubber sleeve A, a spring A, a rubber sleeve B, a copper head, and a connecting box. The piston A is movably sleeved inside the end of tube B furthest from the connecting plug. A copper sheet is fixedly installed at the bottom of the piston A, and a rubber plate is attached to the bottom of the copper sheet. Connectors are fixedly installed on both sides of the isolation box, and PC tubes A and B are fixedly connected inside each connector. A rubber sleeve A is fixedly installed at the end of the connector furthest from PC tubes A and B. Spring A is wound around the outer wall of the rubber sleeve A. The outer wall of spring A is attached to the rubber sleeve B, and the interior of the rubber sleeve B and the outer wall of the rubber sleeve A are movably sleeved together. A copper head is fixedly installed inside the rubber sleeve B. The connecting box is fixedly installed at the bottom of the isolation box.

[0007] Preferably, a copper sleeve rod is fixedly sleeved inside the rubber sleeve A, and a movable cavity is opened inside the copper sleeve rod. A copper sheet limiting ring is movably sleeved inside the movable cavity, and a copper head is fixedly installed on the top of the copper sheet limiting ring.

[0008] Preferably, a support rod is fixedly installed inside the connecting box, a spring D is movably sleeved on the outer wall of the support rod, a limit plate is movably sleeved on the top of the support rod, a copper sheet is fixedly connected to the top of the rubber plate, and slopes are provided on both sides of the top of the rubber plate.

[0009] Preferably, the interior of the blocking box includes a piston B, a squeezing rod, a mounting plug, an extension rod, a spring C, a partition plate, a sealing plug, and a liquid inlet. The mounting plug is movably fitted inside the blocking box. The extension rod is fixedly installed at the bottom of the mounting plug. The spring C is movably fitted on the outer wall of the extension rod. The bottom of the extension rod passes through the partition plate and is fixedly connected to the sealing plug. The outer wall of the partition plate is fixedly connected to the interior of the blocking box. Liquid inlets are opened on both sides of the bottom of the blocking box, and the liquid inlets and the interior of the liquid inlet pipe are interconnected. The piston B is movably fitted inside the end of the pipe A away from the rod B. The squeezing rod is fixedly installed at the bottom of the piston B, and the bottom of the squeezing rod extends to the top of the mounting plug.

[0010] Preferably, the top of both piston B and piston A is filled with nitrogen gas.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This type of electric water heater's water shortage protection device works by having the floating plate at the bottom of the floating plate move downwards due to gravity when the liquid is depleted, causing rods A and B and the connecting plug to move synchronously. This disconnects the internal circuit of the isolation box, creating an open circuit. It can automatically cut off the power supply when the liquid is insufficient, effectively preventing the equipment from dry burning. This not only ensures the safe operation of the equipment and prevents damage to components due to dry burning, but also significantly extends the service life of the equipment and reduces the risk of use and maintenance costs.

[0013] 2. This type of water shortage protection device for electric water heaters opens the internal channel of the blocking box when the liquid at the bottom of the floating plate is depleted and moves downwards. External liquid can then be replenished to the storage chamber through the inlet pipe in a timely manner, ensuring the liquid supply of the equipment. When the floating plate moves upwards, the sealing plug fits with the inlet to form a seal, preventing liquid from flowing into the water heater. When it moves downwards, the sealing plug disengages from the inlet, opening the channel and allowing liquid to be delivered to the water heater. This achieves precise control of liquid replenishment and blocking based on the movement of the floating plate, ensuring timely liquid replenishment when needed and preventing liquid overflow from overfilling. This improves equipment efficiency, optimizes the liquid management process, and makes the equipment work more stably and reliably. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall internal structure of the isolation box in this utility model;

[0016] Figure 3 This is a schematic diagram of the connection between the copper head and the copper sleeve rod in this utility model;

[0017] Figure 4 This is a schematic diagram of the overall cross-sectional structure of the blocking box in this utility model;

[0018] Figure 5 This is a schematic diagram of the overall internal structure of the connecting box in this utility model.

[0019] In the diagram: 1. Water heater; 2. Floating plate; 3. Rod A; 4. Rod B; 5. Inlet pipe; 6. Blocking box; 7. Pipe A; 8. Pipe B; 9. Connecting plug; 10. Isolation box; 11. Piston A; 12. Copper sheet; 13. PC pipe A; 14. PC pipe B; 15. Connector; 16. Rubber sleeve A; 19. Spring A; 20. Rubber sleeve B; 21. Copper head; 22. Copper sheet limiting ring; 23. Copper sleeve rod; 24. Movable cavity; 25. Piston B; 26. Extrusion rod; 27. Connecting box; 28. Mounting plug; 29. ​​Extension rod; 30. Spring C; 31. Divider plate; 32. Sealing plug; 33. Inlet; 121. Limiting plate; 122. Support rod; 123. Spring D; 1211. Rubber plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see Figure 1-5 This utility model provides a technical solution for a water shortage protection device for an electric water heater: The device includes a water heater 1, with a storage cavity inside. A lifting component is movably connected inside the storage cavity, and a short-circuit blocking component and a liquid valve switch are movably connected to the top of the lifting component. The lifting component includes a floating plate 2, rod A3, rod B4, and connecting plug 9. The floating plate 2 is movably connected inside the storage cavity, and symmetrical rods A3 and B4 are fixedly installed on both sides of the top of the floating plate 2. Connecting plugs 9 are fixedly installed on the tops of rods A3 and B4. The short-circuit blocking component includes a pipe B8 and an isolation box 10. The top of rod A3 is movably connected to pipe B8, and the bottom of pipe B8 is fixedly connected to the isolation box 10. The liquid valve switch includes an inlet pipe 5, an isolation box 6, and a pipe A7. The top of rod B4 is movably connected to pipe A7, and the bottom of pipe A7 is fixedly connected to the isolation box 6. Inlet pipes 5 are fixedly installed on both sides of the isolation box 6.

[0023] When the liquid at the bottom of the floating plate 2 is depleted, the entire floating plate 2 will move downwards along the inner wall of the storage chamber under the action of gravity. During this process, rods A3 and B4, which are fixedly connected to the top of the floating plate 2, will drive the connecting plug 9 connected to them to move down synchronously from inside pipes B8 and A7. This movement opens the internal channel of the blocking box 6, allowing external liquid to enter the storage chamber through the liquid inlet pipe 5 to replenish it. At the same time, the internal circuit of the isolation box 10 is disconnected, forming an open circuit, thereby effectively preventing dry burning. This design not only ensures the stable operation of the equipment and improves work efficiency, but also significantly extends the service life of the equipment.

[0024] Example 2:

[0025] The short-circuit isolation component includes a piston A11, a copper sheet 12, a PC tube A13, a PC tube B14, a connector 15, a rubber sleeve A16, a spring A19, a rubber sleeve B20, a copper head 21, and a connecting box 27. The piston A11 is movably sleeved inside the end of tube B8 away from the connecting plug 9. A copper sheet 12 is fixedly installed at the bottom of the piston A11, and a rubber plate 1211 is attached to the bottom of the copper sheet 12. Connectors 15 are fixedly installed on both sides of the isolation box 10, and PC tubes A13 and B14 are fixedly connected inside each connector 15. A rubber sleeve A16 is fixedly installed at the end of connector 15 away from PC tubes A13 and B14. A spring A19 is wound around the outer wall of the rubber sleeve A16, and the outer wall of the spring A19 is attached to the rubber sleeve 27. Rubber sleeve B20 is movably fitted inside and outside rubber sleeve A16. A copper head 21 is fixedly installed inside rubber sleeve B20. A connecting box 27 is fixedly installed at the bottom of the isolation box 10. A copper sleeve rod 23 is fixedly fitted inside rubber sleeve A16. A movable cavity 24 is formed inside the copper sleeve rod 23. A copper sheet limiting ring 22 is movably fitted inside the movable cavity 24. A copper head 21 is fixedly installed on the top of the copper sheet limiting ring 22. A support rod 122 is fixedly installed inside the connecting box 27. A spring D123 is movably fitted on the outer wall of the support rod 122. A limiting plate 121 is movably fitted on the top of the support rod 122. A copper sheet 12 is fixedly connected to the top of the rubber plate 1211. Sloping sections are formed on both sides of the top of the rubber plate 1211.

[0026] When the floating plate 2 moves upward, the rod A3 fixed at the top will drive the connecting plug 9 to move upward along the inner wall of the tube B8. During this process, the gas stored at the top of the connecting plug 9 is compressed, and after the density increases, it pushes the piston A11, which is movably sleeved in the tube B8, to move downward. When the piston A11 moves downward, the copper sheet 12 fixed at its bottom extends into the isolation box 10. When the copper sheet 12 is in contact with the top of the rubber plate 1211, the downward thrust will cause the rubber plate 1211 to retract into the connecting box 27. During the retraction process, the limiting plate 121 fixed at the bottom of the rubber plate 1211 compresses the spring D123 along the outer wall of the support rod 122, so that the spring D123 initially stores force. At the same time, the copper sheet 12 extends between the two copper heads 21, widening the gap between them. When the gap widens, the rubber sleeve B20 fixedly sleeved on the outer wall of the copper head 21 compresses along the outer wall of the rubber sleeve A16, so that the rubber sleeve B20 completes synchronously. During the initial power accumulation, it is particularly important to note that when the copper sheet 12 is inserted at the gap between the copper heads 21, a closed circuit is formed, providing power for the water heating function. When the floating plate 2 moves downward, the top-fixed rod A3 drives the connecting plug 9 to move down along the inner wall of the tube B8. At this time, the gas compression force disappears, and a suction force is formed inside the tube B8, which draws the piston A11, which has been pushed to the bottom of the other side, back into the tube B8. The copper sheet 12 at the bottom of the piston A11 also retracts back into the tube B8. As the pushing force of the copper sheet 12 and the rubber plate 1211 is canceled, the spring D123 generates a rebound force due to the power accumulation. The rubber plate 1211 extends to the gap between the two copper heads 21, reducing the gap. At this time, the rebound force of the spring A19 pushes the rubber sleeve B20 forward, ensuring that the copper head 21 fixed inside it adheres to the side of the rubber plate 1211 to form an insulating structure. This avoids dry burning and continuously ensures the working efficiency of the equipment.

[0027] Example 3:

[0028] The interior of the blocking box 6 includes a piston B25, a compression rod 26, a mounting plug 28, an extension rod 29, a spring C30, a partition plate 31, a sealing plug 32, and a liquid inlet 33. The mounting plug 28 is movably fitted inside the blocking box 6. The extension rod 29 is fixedly mounted on the bottom of the mounting plug 28. The spring C30 is movably fitted onto the outer wall of the extension rod 29. The bottom of the extension rod 29 passes through the partition plate 31 and is fixedly connected to the sealing plug 32. The outer wall of the partition plate 31 is fixedly connected to the interior of the blocking box 6. Liquid inlets 33 are opened on both sides of the bottom of the blocking box 6, and the liquid inlets 33 and the interior of the liquid inlet pipe 5 are interconnected. The piston B25 is movably fitted inside the end of pipe A7 away from rod B4. The compression rod 26 is fixedly mounted on the bottom of piston B25. The bottom of the compression rod 26 extends to the top of the mounting plug 28. The tops of piston B25 and piston A11 are filled with nitrogen gas.

[0029] As the floating plate 2 moves upward, the rods B4, symmetrically distributed with rod A3, slide along the inside of pipe A7. At this time, the connecting plug 9, fixedly connected to the top of rod B4, will compress the nitrogen gas filled at the top. As the nitrogen gas is compressed, its density increases, generating thrust and pushing piston B25 to extend to the bottom of the other side of pipe A7. The compression rod 26, fixedly connected to the bottom of piston B25, then extends into the interior of the blocking box 6 and fits tightly against the top of the mounting plug 28. The thrust generated at the moment of contact causes the mounting plug 28 to drive the extension rod 29 and the sealing plug 32 to move downward together. During this descent, the mounting plug 28 will initially compress the spring C30 movably sleeved on the outer wall of the extension rod 29, allowing it to store force. When the sealing plug 32 moves to the bottom of the blocking box 6 and fits against the side of the liquid inlet 33, a sealing structure is formed, effectively preventing liquid from continuing to flow into the interior of the water heater 1 and preventing overflow due to overfilling. When the floating plate 2 moves downward, it drives the connecting plug 9, fixedly connected to the top of rod B4, to slide along the inside of pipe A7. As the nitrogen gas is moved, the squeezing effect of the connecting plug 9 disappears, the gas pressure is released, and a suction force is formed in the tube A7, which draws the piston B25, which has extended to the bottom of the other side, back into the tube A7. The squeezing rod 26 at the bottom of the piston B25 also retracts back into the tube A7. As the pushing force on the mounting plug 28 disappears, the squeezing force on the spring C30 is also released, and the spring C30 then generates a rebound force, pushing the mounting plug 28 upward. During the upward movement of the mounting plug 28, the extension rod 29 and the partition plate 31 fixedly connected to its bottom also move upward together, thereby causing the sealing plug 32 to disengage from the liquid inlet 33. The internal channel of the liquid inlet 33 is reconnected, and the liquid can be smoothly delivered to the interior of the water heater 1 through the liquid inlet 33. In addition, the side of the liquid inlet pipe 5 away from the blocking box 6 is movably connected to the interior of the floating plate 2, and its bottom extends to the bottom of the inner cavity of the water heater 1. This design allows the floating plate 2 to move up and down smoothly during the subsequent liquid replenishment process, which not only improves the efficiency of use, but also optimizes the overall working performance.

[0030] Working principle:

[0031] first step:

[0032] When the liquid at the bottom of the floating plate 2 is exhausted, it moves down along the inner wall of the storage cavity under the action of gravity, which drives the fixed rods A3 and B4 and the connected plug 9 at the top to move down synchronously from the tubes B8 and A7, opening the internal channel of the blocking box 6, and external liquid is replenished into the storage cavity through the liquid inlet pipe 5; at the same time, the internal circuit of the isolation box 10 is disconnected to form an open circuit and prevent dry burning.

[0033] Step Two:

[0034] When the floating plate 2 moves upward, the top rod A3 drives the connecting plug 9 to move upward along the inner wall of the tube B8, squeezing the gas at the top and pushing the piston A11 downward. The copper plate 12 at the bottom of the piston A11 extends into the isolation box 10 and fits with the rubber plate 1211, causing the rubber plate 1211 to contract and compress the spring D123 to store power. At the same time, the copper plate 12 expands the gap between the two copper heads 21, allowing the rubber sleeve B20 to compress and store power and form a closed circuit, energizing the water boiling function. The symmetrically distributed rods B4 slide along the tube A7, and the connecting plug 9 squeezes nitrogen to push the piston B25, the squeezing rod 26 to fit with the mounting plug 28, driving the extension rod 29 and the sealing plug 32 to move downward and compress the spring C30 to store power. The sealing plug 32 fits with the liquid inlet 33 to form a seal to prevent liquid from overflowing.

[0035] Step 3:

[0036] When the floating plate 2 moves downward, the gas pressure in the pipe B8 disappears, creating suction that pulls the piston A11 and copper plate 12 back. The spring D123 rebounds, causing the rubber plate 1211 to reduce the distance between the copper heads 21. The rubber sleeve B20 pushes the copper heads 21 to adhere to the rubber plate 1211, forming an insulating structure. The suction in the pipe A7 pulls the piston B25 and the extrusion rod 26 back. The spring C30 rebounds, pushing the mounting plug 28 upward. The sealing plug 32 disengages from the liquid inlet 33, opening the channel. Liquid is then transported to the water heater 1 through the liquid inlet 33. The movable sleeve design between the liquid inlet pipe 5 and the floating plate 2 ensures that the floating plate 2 can move smoothly up and down when replenishing liquid.

Claims

1. A water shortage protection device for an electric water heater, comprising a water heater (1), characterized in that: The water heater (1) has a storage cavity inside, and a lifting component is movably connected inside the storage cavity. A short-circuit blocking component and a liquid valve switch component are movably connected to the top of the lifting component. The lifting component includes a floating plate (2), rod A (3), rod B (4), and connecting plug (9). The floating plate (2) is movably sleeved inside the storage cavity. The top two sides of the floating plate (2) are fixedly installed with symmetrical rods A (3) and B (4). The top of rods A (3) and B (4) are fixedly installed with connecting plugs (9). The short-circuit blocking device includes a tube B (8) and an isolation box (10). The top of the rod A (3) is movably connected to the tube B (8), and the bottom of the tube B (8) is fixedly connected to the isolation box (10). The liquid valve switch includes an inlet pipe (5), a blocking box (6), and a pipe A (7). The top of the rod B (4) is movably connected to the pipe A (7), and the bottom of the pipe A (7) is fixedly connected to the blocking box (6). The inlet pipe (5) is fixedly installed on both sides of the blocking box (6).

2. The water shortage protection device for an electric water heater according to claim 1, characterized in that: The short-circuit blocking component includes piston A (11), copper sheet (12), PC tube A (13), PC tube B (14), connector (15), rubber sleeve A (16), spring A (19), rubber sleeve B (20), copper head (21), and connecting box (27). Piston A (11) is movably sleeved inside the end of tube B (8) away from connecting plug (9). Copper sheet (12) is fixedly installed at the bottom of piston A (11). Rubber plate (1211) is attached to the bottom of copper sheet (12). Connectors (15) are fixedly installed on both sides of the blocking box (10). PC pipe A (13) and PC pipe B (14) are fixedly connected inside the connector (15). A rubber sleeve A (16) is fixedly installed at the end of the connector (15) away from PC pipe A (13) and PC pipe B (14). A spring A (19) is wound around the outer wall of the rubber sleeve A (16). The outer wall of the spring A (19) is attached to the rubber sleeve B (20), and the inside of the rubber sleeve B (20) and the outer wall of the rubber sleeve A (16) are movably connected. A copper head (21) is fixedly installed inside the rubber sleeve B (20). A connecting box (27) is fixedly installed at the bottom of the isolation box (10).

3. The water shortage protection device for an electric water heater according to claim 2, characterized in that: A copper sleeve rod (23) is fixedly sleeved inside the rubber sleeve A (16). A movable cavity (24) is opened inside the copper sleeve rod (23). A copper sheet limiting ring (22) is movably sleeved inside the movable cavity (24). A copper head (21) is fixedly installed on the top of the copper sheet limiting ring (22).

4. The water shortage protection device for an electric water heater according to claim 2, characterized in that: The connecting box (27) is fixedly installed with a support rod (122). A spring D (123) is movably sleeved on the outer wall of the support rod (122). A limit plate (121) is movably sleeved on the top of the support rod (122). A copper sheet (12) is fixedly connected to the top of the rubber plate (1211). Slopes are provided on both sides of the top of the rubber plate (1211).

5. The water shortage protection device for an electric water heater according to claim 2, characterized in that: The interior of the blocking box (6) includes a piston B (25), a squeezing rod (26), a mounting plug (28), an extension rod (29), a spring C (30), a partition plate (31), a sealing plug (32), and a liquid inlet (33). The mounting plug (28) is movably fitted inside the blocking box (6). The extension rod (29) is fixedly installed at the bottom of the mounting plug (28). The spring C (30) is movably fitted on the outer wall of the extension rod (29). The bottom of the extension rod (29) passes through the partition plate (31). The sealing plug (32) is fixedly connected to the outer wall of the partition plate (31) and the interior of the blocking box (6). The bottom sides of the blocking box (6) are provided with liquid inlets (33), and the liquid inlets (33) and the interior of the liquid inlet pipe (5) are interconnected. The piston B (25) is movably sleeved at the end of the pipe A (7) away from the rod B (4). The bottom of the piston B (25) is fixedly installed with a squeezing rod (26), and the bottom of the squeezing rod (26) extends to the top of the mounting plug (28).

6. The water shortage protection device for an electric water heater according to claim 5, characterized in that: The top of piston B (25) and the top of piston A (11) are both filled with nitrogen gas.

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