A safe and non-fouling electric water heater

Abstract

The application discloses a safe and non-scaling exchange type electric water heater. The box body is mainly loaded with deionized water or heat-conducting oil. The deionized water or heat-conducting oil is heated by a heating tube, and then the ionized water or heat-conducting oil is used to conductively heat the water to be used through a spiral pipe, so that the scaling of the water to be used is avoided, the electric heating tube is not covered by the scaling, and the safety is ensured. The water path of the application does not press the box body, so the box body can be manufactured in various forms according to the needs, and the pressure problem does not need to be considered too much, so the occupied space is saved. In addition, the flowing water body is heated, the problem of bacteria breeding in the stagnant water body of the traditional electric water heater is avoided, the health of the people is improved, and in addition, the length and form of the water outlet pipe and the water inlet pipe are arranged, so that the electric isolation effect is improved from the physical layer.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, specifically to a safe and scale-resistant exchange-type electric water heater. Background Technology

[0002] Nowadays, with the continuous improvement of living standards, more and more families have installed electric water heaters. Existing electric water heaters rely on the cold water entering to push out hot water. Therefore, in order to ensure the pressure resistance of the container, most electric water heaters are mostly round tanks. However, round tanks take up a lot of space in the bathroom. In addition, since the water inside the tank is mostly stagnant, it can cause some problems.

[0003] First, storing water for a long time can breed bacteria, leading to unhealthy bathing conditions; second, tap water itself contains very little algae, which can easily multiply over time.

[0004] In addition, existing electric water heaters use electric heating elements to directly heat tap water. The surface temperature of the heating element is high, and scale is easily generated when it comes into contact with tap water. Due to its lack of fluidity, scale easily adheres to the heating element. When the scale buildup reaches a certain thickness, the heat from the electric heating element cannot be transferred to the water quickly, causing the heating element to burst at high temperature.

[0005] Furthermore, due to factors such as prolonged use, some electric water heaters may experience electrical leakage. The current flowing with the water could potentially harm the human body. Existing inlet and outlet pipes are too short to provide adequate electrical isolation. To address this, we propose a safer, scale-resistant, exchange-type electric water heater. Summary of the Invention

[0006] The purpose of this invention is to provide a safe and scale-resistant exchange-type electric water heater to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a safe and scale-resistant exchange-type electric water heater, comprising a housing, the housing having an internal cavity, a housing cover rotatably connected to the upper side of the cavity, two vent holes inside the housing cover, a baffle plate inside the cavity, a spiral tube on the upper side of the baffle plate, first docking blocks rotatably connected to both ends of the spiral tube, docking cavities inside the two first docking blocks, a baffle plate sleeved on the outer wall of the spiral tube inside the docking cavity, the baffle plate being connected to the side wall of the docking cavity by a first spring, multiple locking blocks fixedly connected to the side wall of the docking cavity, an inlet pipe and an outlet pipe on the lower side of the baffle plate, second docking blocks fixedly connected to the upper ends of the inlet pipe and the outlet pipe, multiple locking grooves on the outer wall of the second docking blocks, and two second docking blocks penetrating the baffle plate and respectively movably locking into the interior of the corresponding docking cavities;

[0008] Heating elements are provided around the inlet and outlet pipes. One end of each heating element is movably connected to a support frame fixed to the side wall of the cavity. The other end of each heating element penetrates the side wall of the cavity and extends to the outside of the housing, where it is connected to a control module. The lower ends of both the inlet and outlet pipes penetrate the side wall of the cavity and extend to the outside of the housing. A mixing valve is fixedly connected to the lower side of the housing. The mixing valve is connected to the outlet pipe and to the inlet pipe via a connecting pipe. A mixing pipe is connected to one side of the mixing valve. Switches are provided on the side walls of both the inlet and outlet pipes.

[0009] Preferably, both ends of the fence plate are movably engaged with a first fixing block, and the two first fixing blocks are slidably connected to the inside of the corresponding first sliding groove by a second spring. The two first sliding grooves are opened on the two side walls of the cavity.

[0010] Preferably, the end of the second docking block is provided with an O-ring.

[0011] Preferably, a second sliding groove is formed on the outer side wall of the box body, and a second fixing block is slidably connected inside the second sliding groove by a third spring. The end of the second fixing block away from the third spring passes through the side wall of the second sliding groove and extends to the outside of the box body and is movably engaged with the box lid.

[0012] Preferably, the mixing valve has a water flow channel inside, the outlet pipe and the connecting pipe are connected to the water flow channel, the end of the water flow channel away from the outlet pipe is provided with a guide post, the outer wall of the guide post is slidably sleeved with a slider by a fourth spring, the slider has an L-shaped water channel inside, and the water flow channel is connected to the mixing pipe located on the lower side of the mixing valve.

[0013] Preferably, the side wall of the enclosure has a glass window.

[0014] Preferably, both the inlet pipe and the outlet pipe are provided with sealing gaskets at the points where they penetrate the side wall of the tank.

[0015] Preferably, a gasket is provided at the upper end of the box.

[0016] Preferably, both the inlet pipe and the outlet pipe are made of nylon and are curved and coiled on the lower side of the cavity, and the length of the inlet pipe and the outlet pipe is 0.5 to 3 meters.

[0017] Preferably, the spiral tube is a corrugated high-nickel stainless steel tube with a length of 1.0 to 6.0 meters.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses indirect heat transfer to heat the water in the spiral tube, which has lower requirements for the pressure resistance of the housing. Therefore, the housing of the present invention can be manufactured in various shapes to meet the needs of users, thus making it easy to stick to the wall and saving bathroom space. The interior of the cavity heats the heat-conducting oil or deionized water containing heating through the heating element, and heats the water along the spiral tube through heat conduction. Since the water used is constantly flowing and does not come into direct contact with the electric heating element, neither the interior of the housing nor the electric heating element will produce a large amount of scale, thereby reducing the risk of the electric heating element bursting. The housing and pipes of this device are mostly made of nylon insulation material and the pipes are long enough to provide electrical isolation, thus further ensuring the safety of the water heater from leakage. In addition, since the water used is flowing water, the water quality is fresh and will not smell bad or produce bacteria, thus making bathing more comfortable and ensuring human health and safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the cavity in this invention;

[0021] Figure 3 This is a schematic diagram of the connection between the inlet pipe, the spiral pipe, and the outlet pipe of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the box lid when it is opened according to the present invention;

[0023] Figure 5 This is a partial cross-sectional view of the connection between the first docking block and the second docking block of the present invention;

[0024] Figure 6 This is an enlarged schematic diagram of point A in the present invention;

[0025] Figure 7 This is a partial cross-sectional view of the connection between the second slide and the second fixing block of the present invention;

[0026] Figure 8 This is a partial cross-sectional view of the interior of the mixing valve of the present invention.

[0027] In the diagram: 1. Box body, 2. Cavity, 3. Fence plate, 4. Spiral tube, 5. First docking block, 6. Docking cavity, 7. First spring, 8. Baffle, 9. Locking block, 10. Second docking block, 11. Locking groove, 12. O-ring, 13. Water inlet pipe, 14. Water outlet pipe, 15. Sealing gasket, 16. Heating element, 17. Control module, 18. Mixing valve, 19. Connecting pipe, 20. Mixing pipe, 21. Switch, 22. Box cover, 23. First slide groove, 24. Second spring, 25. First fixing block, 26. Second slide groove, 27. Third spring, 28. Second fixing block, 29. Gasket, 30. Support frame, 31. Glass window, 32. Water channel, 33. L-shaped waterway, 34. Guide column, 35. Fourth spring, 36. Vent, 37. Slider. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-8 This invention provides a technical solution: a safe and scale-resistant exchange-type electric water heater, comprising a housing 1, with an internal cavity 2. An appropriate amount of heat-conducting oil or deionized water is placed inside the cavity 2. Heat emitted by the heating element 16 is transferred to the working water inside the spiral tube 4 via the heat-conducting oil or deionized water, raising the water temperature. The heat-conducting oil or deionized water comes into contact with the heating element 16, preventing scale formation. This indirect heat transfer reduces scale buildup and associated problems. A cover 22 is rotatably connected to the upper side of the cavity 2. The cover 22 has two vent holes 36 inside. When the temperature of the heat-conducting oil or deionized water rises, the pressure inside the cavity 2 increases due to the high temperature. The vent holes 36 release the expanded air, reducing the pressure impact on the device. A grid plate 3 is provided inside the cavity 2. Figure 2The cavity 2 shown has a protrusion on its side wall to support the guardrail plate 3. The guardrail plate 3 supports the inlet pipe 13, the spiral pipe 4, and the outlet pipe 14, preventing them from tilting. The inlet pipe 13 and the outlet pipe 14 are both made of nylon and are coiled in a curved shape on the lower side of the cavity 2. The length of the inlet pipe 13 and the outlet pipe 14 is 0.5 to 3 meters. The inlet pipe 13 and the outlet pipe 14 are made of insulating material to prevent leakage and electric shock. The longer pipes also effectively increase the resistance of the water circuit, thereby reducing the water flow. To mitigate the risk of electric shock when energized, the grille plate 3 has multiple holes to increase convection, ensuring that the temperature of the heat-conducting oil or deionized water on the upper side of the grille plate 3 is consistent with that on the lower side. A spiral tube 4, made of corrugated high-nickel stainless steel, is provided on the upper side of the grille plate 3, with a length ranging from 1.0 to 6.0 meters. This increases the surface area of ​​the spiral tube 4. The 4-meter-long spiral tube 4 allows for more thorough heat exchange between the internal water and the external heat-conducting oil or deionized water. Both ends of the spiral tube 4 are rotatably connected to a first connecting block 5. Each of the first docking blocks 5 has a docking cavity 6 inside. A baffle 8 is fitted onto the outer wall of the spiral tube 4 inside each docking cavity 6. The baffle 8 is connected to the side wall of the docking cavity 6 via a first spring 7. The first spring 7 pushes against the first docking block 5, making the locking block 9 and the locking groove 11 more securely engaged. Multiple locking blocks 9 are fixedly connected to the side wall of the docking cavity 6. A water inlet pipe 13 and a water outlet pipe 14 are provided on the lower side of the fence plate 3. The water inlet pipe 13 and the water outlet pipe 14 are long, thin plastic pipes. The upper end of the water outlet pipe 14 is fixedly connected to a second docking block 10. Multiple slots 11 are opened on the outer side wall of the second docking block 10. The two second docking blocks 10 pass through the fence plate 3 and are respectively movably locked into the interior of the corresponding docking cavity 6. When the second docking block 10 is locked into the interior of the docking cavity 6, multiple locking blocks 9 are locked into the interior of the corresponding slots 11. When disassembling, press and rotate the first docking block 5 and then release it. The locking blocks 9 are disengaged from the slots 11, thereby disengaging the first docking block 5 from the second docking block 10.

[0030] Heating elements 16 are arranged around the inlet pipe 13 and outlet pipe 14. These heating elements 16 serve as the heat source, heating the water using heat-conducting oil or deionized water. One end of each heating element 16 is movably connected to a support frame 30 fixed to the side wall of the cavity 2, making the heating element 16 more secure. The other end of each heating element 16 penetrates the side wall of the cavity 2 and extends to the outside of the housing 1, where it is connected to a control module 17. The control module 17 controls the heating of the heating elements 16. The control module 17 internally includes a display, a button module, and a microcontroller. Many existing electric water heaters use publicly available technologies for displays, button modules, and microcontrollers, and their structures and principles are not the technical features of this invention. Therefore, it will not be described in detail. The lower ends of the water inlet pipe 13 and the water outlet pipe 14 both penetrate the side wall of the cavity 2 and extend to the outside of the box body 1. A mixing valve 18 is fixedly connected to the lower side of the box body 1. The mixing valve 18 is interconnected with the water outlet pipe 14. The mixing valve 18 is interconnected with the water inlet pipe 13 through the connecting pipe 19. A mixing pipe 20 is connected to one side of the mixing valve 18. Switches 21 are provided on the side walls of the water inlet pipe 13 and the connecting pipe 19. The switch 21 on the side wall of the water inlet pipe 13 controls the flow and stop of the total water used. The switch 21 on the side wall of the connecting pipe 19 can adjust the flow rate of cold water flowing into the water tank 32 from the inside of the connecting pipe 19, thereby adjusting the temperature of the water used inside the water tank 32.

[0031] Specifically, both ends of the fence plate 3 are movably engaged with first fixing blocks 25. Both sides of the cavity 2, located below the first fixing blocks 25, have protrusions. The two ends of the fence plate 3 rest on these two protrusions. The upper side of the engagement end of the first fixing blocks 25 and the fence plate 3 is chamfered to facilitate the placement of the fence plate 3. Both first fixing blocks 25 are slidably connected to the interior of corresponding first sliding grooves 23 via second springs 24. The two first sliding grooves 23 are located on the side walls of the cavity 2, further fixing the position of the fence plate 3 and preventing its position from changing.

[0032] Specifically, the end of the second docking block 10 is provided with an O-ring 12, which serves to seal and prevent the heat-conducting oil or deionized water inside the cavity 2 from seeping into the water inlet pipe 13 or the water outlet pipe 14.

[0033] Specifically, a second sliding groove 26 is provided on the outer side wall of the box body 1. A second fixing block 28 is slidably connected inside the second sliding groove 26 through a third spring 27. The upper side of the second fixing block 28 that engages with the box cover 22 is chamfered to facilitate the closing of the box cover 22. The end of the second fixing block 28 away from the third spring 27 passes through the side wall of the second sliding groove 26 and extends to the outside of the box body 1 and engages with the box cover 22. After the box cover 22 is closed, the second fixing block 28 engages with the box cover 22, which helps to fix the box cover 22.

[0034] Specifically, the mixing valve 18 has a water channel 32 inside. The outlet pipe 14 and the connecting pipe 19 are connected to the water channel 32. The end of the water channel 32 away from the outlet pipe 14 is provided with a guide post 34. The outer wall of the guide post 34 is slidably sleeved with a slider 37 through a fourth spring 35. The slider 37 has an L-shaped water channel 33 inside. When the slider 37 slides, the L-shaped water channel 33 can connect the water channel 32 and the connecting pipe 19. The water channel 32 is connected to the mixing pipe 20 located below the mixing valve 18. The connection between the outlet pipe 14 and the water channel 32 is in the stretching direction of the fourth spring 35. When the switch 21 on the inlet pipe 13 is closed, the slider 37 is blocked by the action of the fourth spring 35 at the connection between the outlet pipe 14 and the water channel 32. At this time, the L-shaped water channel 33 and the connecting pipe 19 are intersected, and the side wall of the slider 37 blocks the connection between the water channel 32 and the connecting pipe 19. When the inlet pipe 13 is blocked, the water flow is blocked. When the switch 21 on the inlet pipe 13 is turned on, the water flows along the spiral pipe 4 and the outlet pipe 14 in sequence. Water will come out of the outlet pipe 14. When there is water pressure inside the outlet pipe 14, the slider 37 can be pushed to open the connection between the outlet pipe 14 and the water tank 32. After the connection between the outlet pipe 14 and the water tank 32 is opened, the water enters the water tank 32. At this time, the L-shaped water channel 33 can connect the connecting pipe 19 to the water tank 32. The switch 21 on the connecting pipe 19 controls a portion of the water inside the inlet pipe 13 to enter the water tank 32 directly through the connecting pipe 19 for mixing and temperature adjustment. The water inside the outlet pipe 14 and the water inside the inlet pipe 13 mix inside the water tank 32 and then flow out from the inside of the mixing pipe 20. This structure is set to prevent cold water from directly entering the mixing valve 18 and flowing out from the mixing pipe 20.

[0035] Specifically, a glass window 31 is provided on the side wall of the housing 1. Since some of the heat transfer oil or deionized water will evaporate when the temperature rises, the glass window 31 is provided to facilitate observation of the decrease in the amount of heat transfer oil or deionized water inside the cavity 2 and to add it in time. The connection between the glass window 31 and the housing 1 is sealed.

[0036] Specifically, both the inlet pipe 13 and the outlet pipe 14 are provided with sealing gaskets 15 at the points where they penetrate the side wall of the housing 1 to prevent heat transfer oil or deionized water from leaking out.

[0037] Specifically, the upper end of the box body 1 is provided with a gasket 29, which seals the connection between the box cover 22 and the box body 1 when the box cover 22 is closed.

[0038] Working principle: During installation, the inlet pipe 13 and outlet pipe 14 are passed through the heating element 16 and the side wall of the housing 1, and fixedly connected to the inside of the cavity 2 through the sealing gasket 15. Then, the grid plate 3 is fixedly snapped into the inside of the cavity 2. The spiral tube 4 is connected to the inlet pipe 13 and outlet pipe 14 through the first connecting block 5 and the second connecting block 10, forming a water pipe passage inside the cavity 2. An appropriate amount of heat transfer oil or deionized water is added to the inside of the cavity 2. After the heat transfer oil or deionized water is heated to a suitable temperature by the heating element 16, the switch 21 on the inlet pipe 13 is opened, and water flows along the inlet pipe 13, the spiral tube 4 and the outlet pipe 14, and inside the spiral tube 4. During the flow process, the water is heated by the heat-conducting oil or deionized water in the cavity 2. When it flows to the connection between the outlet pipe 14 and the water tank 32, the water pressure inside the outlet pipe 14 pushes the slider 37, opening the connection between the outlet pipe 14 and the water tank 32 and entering the water tank 32. At this time, the L-shaped water channel 33 can connect the connecting pipe 19 to the water tank 32. Then, the switch 21 on the connecting pipe 19 can be controlled to allow a portion of the water inside the inlet pipe 13 to directly enter the water tank 32 through the connecting pipe 19. The water inside the outlet pipe 14 and the water inside the inlet pipe 13 mix inside the water tank 32 and then flow out from the mixing pipe 20 for use.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safe and scale-resistant exchange-type electric water heater, comprising a housing (1), characterized in that: The box (1) has an internal cavity (2). The cavity (2) contains heat-conducting oil or deionized water. The cavity (2) is equipped with a spiral tube (4), a heating tube (16), an inlet pipe (13), and an outlet pipe (14). The heating tube (16) is the heat source and heats the water in use through the heat-conducting oil or deionized water. The spiral tube (4) is connected to the inlet pipe (13) and the outlet pipe (14), forming a water pipe passage inside the cavity (2). The heat emitted by the heating tube (16) is transferred to the spiral tube (4) through the heat-conducting oil or deionized water, which raises the temperature of the water in use. The heat-conducting oil or deionized water does not produce scale when in contact with the high-temperature heating tube (16). In this indirect way, heat is transferred to reduce scale accumulation. A mixing valve (18) is fixedly connected to the lower side of the housing (1), and the mixing valve (18) is connected to the outlet pipe (14). The mixing valve (18) is provided with a water channel (32) inside. The outlet pipe (14) and the connecting pipe (19) are connected to the water channel (32). The end of the water channel (32) away from the outlet pipe (14) is provided with a guide post (34). The outer wall of the guide post (34) is slidably sleeved with a slider (37) through a fourth spring (35). The slider (37) has an L-shaped water channel (33) inside. When the slider (37) slides, the L-shaped water channel (33) can connect the water channel (32) and the connecting pipe (19). The water channel (32) is connected to the mixing pipe (20) located on the lower side of the mixing valve (18).

2. The safe and scale-resistant exchange-type electric water heater according to claim 1, characterized in that: The upper side of the cavity (2) is rotatably connected to a cover (22). The inside of the cover (22) is provided with two exhaust holes (36). When the temperature of the heat transfer oil or deionized water rises, the pressure inside the cavity (2) increases due to the high temperature. The air that has expanded due to heat is discharged through the two exhaust holes (36) to reduce the pressure effect on the device.

3. A safe and scale-resistant exchange-type electric water heater according to claim 1, characterized in that: The inlet pipe (13) and outlet pipe (14) are both made of nylon and are curved and coiled inside the cavity (2).

4. A safe and scale-resistant exchange-type electric water heater according to claim 1, characterized in that: The spiral tube (4) has corrugations, which increases the area of ​​the spiral tube (4) and allows for more complete heat exchange between the internal water and the external heat transfer oil or deionized water.

5. A safe and scale-resistant exchange-type electric water heater according to claim 1, characterized in that: The side wall of the box (1) has a glass window (31).

6. A safe and scale-resistant exchange-type electric water heater according to claim 1, characterized in that: Both the inlet pipe (13) and the outlet pipe (14) are provided with sealing gaskets (15) at the points where they penetrate the side wall of the box body 1.

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