Electric water heater and descaling method thereof

Abstract

The invention discloses an electric water heater and a descaling method thereof, comprising an inner tank body, a transfer water box is arranged at the bottom end of the inner tank body, a rotating shaft is rotatably penetrated on the side wall of the transfer water box, and the inner and outer ends of the rotating shaft are respectively sleeved with a pushed water wheel blade and a splitting and pushing scale assembly; a liquid push arc tube and an auxiliary liquid tube are respectively connected and arranged on the top wall and the other side wall of the transfer water box, and a discharge cone head facing the sewage outlet is connected and arranged on the side wall of the liquid push arc tube. The water flow of the auxiliary liquid tube finally flows toward the liquid push arc tube through the liquid spray head pipe group, and then pushes the scale particles on the right side of the inner tank body into the scale inlet side of the permeable isolation folding edge mesh plate, and the rotation of the splitting knife and the push scale brush can split and push the incoming scale particles, and the split scale particles are pushed to the sewage outlet side for temporary storage under the left water flow generated by the push scale brush, and finally the operator can centrally clean the scale particles by opening the sewage outlet.

Description

Technical Field

[0001] The invention belongs to the technical field of descaling of electric water heaters, and in particular relates to an electric water heater and a descaling method thereof. Background Art

[0002] Storage-type electric water heaters used in households need to be cleaned of scale regularly, especially in areas with hard water. If the scale is not cleaned for a long time, it will seriously affect the service life of the electric water heater and pose a safety hazard. Some dirt accumulated inside the water heater will also breed bacteria, affecting people's health. There are two existing ways to descale electric water heaters. The first is to descale through the drain outlet on the water heater, and the second is usually to contact maintenance personnel for manual cleaning. However, the cost of manual cleaning is high, and a descaling device needs to be installed in the electric water heater to extend the descaling cycle of the electric water heater, thereby reducing the descaling cost.

[0003] For example, a Chinese patent with the announcement number CN113188257A discloses a descaling method for an electric water heater, comprising: detecting whether the electric water heater is enabled to use hot water; when detecting that the electric water heater is enabled to use hot water, starting the descaling device of the electric water heater, wherein the descaling device can provide a driving force to accelerate the movement of scale deposited in the water tank of the electric water heater when started. The descaling device can accelerate the driving force to accelerate the movement of scale when started, and the scale in the water tank is accelerated and mixed into the water under the action of the driving force, and flows out through the hot water outlet pipe of the electric water heater driven by the water flow, thereby achieving the cleaning of scale.

[0004] However, the above scheme has the following shortcomings: the above-mentioned descaling device stirs and disperses the scale and flows it out through the hot water outlet pipe, but the stirred and dispersed scale particles are not divided. Some larger scale particles will pass through the mixing valve and the shower head in turn through the hot water outlet pipe. The outflow of larger scale particles is likely to cause blockage of the mixing valve or the shower head. For a shower head that is inconvenient to unclog, it is easy to cause the shower head to be frequently blocked, reducing the user experience. How to divide the scale generated in the electric water heater and conveniently clean the scale particles in a centralized manner is a problem that needs to be solved at present.

[0005] To this end, we propose an electric water heater and a descaling method thereof to solve the problems mentioned in the above background technology. Summary of the invention

[0006] The object of the present invention is to provide an electric water heater and a descaling method thereof to solve the problems existing in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An electric water heater comprises an inner tank body and a water inlet pipe, a drain pipe and a sewage outlet respectively arranged at the bottom end thereof, a magnesium rod body being sealed and inserted in the sewage outlet, a transfer water box connected to the water inlet pipe being arranged at the bottom end of the inner tank body, a rotating shaft rotatably penetrated through a bearing hole on the side wall of the transfer water box, and a pushed water wheel blade and a splitting and pushing scale assembly are respectively sleeved on the inner and outer ends of the rotating shaft, and the water flow discharged into the transfer water box by the water inlet pipe drives the rotating shaft to rotate through the pushed water wheel blade, thereby causing the splitting and pushing scale assembly to split the surrounding precipitated scale particles and push them to the sewage outlet side;

[0009] A liquid push arc tube and an auxiliary liquid tube are respectively connected on the top wall and the other side wall of the transfer water box. A discharge cone head facing the sewage outlet is arranged on the side wall of the liquid push arc tube. A liquid spray head tube group facing the liquid push arc tube is arranged on the liquid outlet side of the auxiliary liquid tube.

[0010] Preferably, the cutting and scale pushing assembly includes cutting knives staggered on the rotating shaft, and a scale pushing brush is arranged on the outer surface of the rotating shaft between adjacent cutting knives. The scale pushing brush is arranged at an angle, and the rotation of the rotating shaft can drive the cutting knives and the scale pushing brush to rotate respectively, and the cutting knives cut the surrounding large particles of scale, and the rotation of the scale pushing brush can generate water flow in the direction of the sewage outlet, thereby pushing the cut scale particles into the periphery of the sewage outlet.

[0011] Preferably, a water-permeable isolation folded edge mesh plate located above the rotating shaft is provided inside the inner liner body, a scale water inlet is provided on the upper end surface of the water-permeable isolation folded edge mesh plate, and scale guide inclined plates are provided on the rear and upper sides of the upper end surface of the scale water inlet, an isolation inclined plate cover is provided between the top end surface of the water-permeable isolation folded edge mesh plate and the inner wall of the inner liner body, and the sewage outlet and the magnesium rod body are both located in the space formed by the inner liner body, the water-permeable isolation folded edge mesh plate and the isolation inclined plate cover.

[0012] Preferably, a liquid guiding block is provided on the liquid outlet side of the discharge cone head, and the liquid guiding block can increase the diffusion range and flow rate of the water flow discharged from the discharge cone head.

[0013] Preferably, a ring box is provided between the liquid inlet side of the auxiliary liquid pipe and the transfer water box, a movable groove is provided on the side wall of the inner end of the rotating shaft, a return spring sleeve rod is movably inserted in the movable groove, and a water blocking plate located in the ring box is provided at the outer end of the return spring sleeve rod. When the rotating shaft is not subject to greater resistance from external scale, the return spring sleeve rod overcomes the spring force and moves outward under the action of the centrifugal force generated by the rotation of the rotating shaft, thereby separating the water blocking plate from the inner wall of the ring box. At this time, the transfer water box, the ring box and the auxiliary liquid pipe are in a conductive state; if the rotating shaft is subject to greater resistance from external scale, the water blocking plate fits against the inner wall of the ring box under the action of the return spring sleeve rod. At this time, the transfer water box, the ring box and the auxiliary liquid pipe are in a closed and blocked state.

[0014] Preferably, an annular groove is provided on the inner side wall of the ring box, and rolling balls are symmetrically provided on the side wall corresponding to the water blocking plate. The water blocking plate rotates in the annular groove through the rolling balls, thereby dynamically blocking the water flow of the ring box.

[0015] A descaling method, used for the above-mentioned electric water heater, comprises the following steps:

[0016] A. Connect the transfer water box to the water outlet of the water inlet pipe, make the outer end of the rotating shaft face the sewage outlet, adjust the outlet direction of the drainage cone head, and install the permeable isolation folding mesh plate and the isolation inclined plate cover at the same time, so that the sewage outlet and the magnesium rod body are located in the space formed by the inner tank body, the permeable isolation folding mesh plate and the isolation inclined plate cover;

[0017] B. When the drain pipe is in use, the tap water connected to the water inlet pipe is pushed into the transfer water box under the action of water pressure. The tap water flowing into the transfer water box pushes the propeller blades to rotate, and the propeller blades drive the slitting knife and the scale pushing brush on the rotating shaft to rotate. The scale particles in the inner tank are precipitated and fall into the rotating shaft area through the scale inlet and are cut by the slitting knife. At the same time, the rotation of the scale pushing brush can push the cut scale particles to the sewage outlet side.

[0018] C. The water flow discharged through the spray head group on the auxiliary liquid pipe can push the scale on the right side of the bottom end of the inner tank body toward the scale water inlet. At the same time, the discharge cone head located on the liquid push arc tube pushes the scale inside the inner tank body toward the drain outlet. Finally, the accumulated scale particles are cleaned centrally by opening the drain outlet.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the tap water flowing into the transfer water box will push the propeller blades to rotate under the action of water pressure, and the rotation of the propeller blades will drive the slitting knife and the scale-pushing brush on the rotating shaft to rotate, and the scale particles generated by heating in the inner tank will settle, and the water flow passing through the transfer water box will flow into the liquid-pushing arc tube and the auxiliary liquid tube respectively, and the water flow sprayed by the discharge cone head on the liquid-pushing arc tube can push the scale particles generated on the left side of the inner tank body toward the sewage outlet through the scale water inlet;

[0020] The water flowing through the auxiliary liquid pipe finally flows toward the liquid push arc tube through the liquid spray head pipe group, and then pushes the scale particles on the right side of the inner tank body into the scale inlet side of the water-permeable isolation folded edge mesh plate. The rotation of the slitting knife and the scale pushing brush can cut and push the incoming scale particles. The cut scale particles are pushed to the sewage outlet side for temporary storage under the left water flow generated by the scale pushing brush. Finally, the operator can centrally clean the scale particles by opening the sewage outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0022] Figure 2 for Figure 1 A partial schematic diagram of

[0023] Figure 3 for Figure 2 A partial schematic diagram of the transfer water box area;

[0024] Figure 4 for Figure 2 A schematic top view of the auxiliary liquid pipe and the liquid spray head pipe assembly;

[0025] Figure 5 for Figure 3 A local schematic diagram of the ring box area;

[0026] Figure 6 It is a schematic diagram of the matching structure of the rotating shaft, the liquid-pushing arc tube, the liquid-discharging cone head, the auxiliary liquid pipe, the water-permeable isolation folded edge mesh plate, the isolation inclined plate cover and the scale-guiding inclined plate of the present invention;

[0027] Figure 7 for Figure 6 Schematic diagram of the matching structure of the permeable isolation folded edge mesh plate and the liquid push arc tube.

[0028] In the figure: 1. inner tank body; 2. water inlet pipe; 3. drainage pipe; 4. sewage outlet; 5. magnesium rod body; 6. transfer water box; 7. rotating shaft; 8. pushed water wheel blade; 9. liquid push arc tube; 10. auxiliary liquid pipe; 11. drainage cone head; 12. spray head pipe group; 13. slitting knife; 14. scale pushing brush; 15. water-permeable isolation folding edge mesh plate; 16. scale water inlet; 17. scale guide inclined plate; 18. isolation inclined plate cover; 19. liquid guide edge block; 20. ring box; 21. movable groove; 22. reset spring sleeve rod; 23. water blocking plate; 24. ring groove; 25. rolling ball. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] See also Figure 1-7 , the present invention provides a technical solution:

[0031] Embodiment 1:

[0032] An electric water heater comprises an inner tank body 1 and a water inlet pipe 2, a drain pipe 3 and a sewage outlet 4 respectively arranged at the bottom thereof. A magnesium rod 5 in the prior art is sealed and inserted into the sewage outlet 4. The bottom of the magnesium rod 5 is usually fixed with the plug of the sewage outlet 4, which is convenient for removing the magnesium rod 5 when draining the sewage outlet 4. A transfer water box 6 connected to the water inlet pipe 2 is arranged at the bottom of the inner tank body 1. The transfer water box 6 is arranged near the right bottom of the inner wall of the inner tank body 1. On the side, a rotating shaft 7 is rotatably penetrated through the bearing hole on the side wall of the transfer water box 6, and the rotating shaft 7 is horizontally arranged. The inner and outer ends of the rotating shaft 7 are respectively sleeved with a pushed water wheel blade 8 and a cutting and pushing scale assembly. The outlet side of the water inlet pipe 2 and the pushed water wheel blade 8 are staggered, so that the water flow discharged from the water inlet pipe 2 into the transfer water box 6 drives the rotating shaft 7 to rotate through the pushed water wheel blade 8, and then the cutting and pushing scale assembly cuts the surrounding precipitated scale particles and pushes them to the side of the sewage outlet 4;

[0033] A liquid push arc tube 9 and an auxiliary liquid tube 10 are respectively connected on the top wall and the right side wall of the transfer water box 6. A discharge cone head 11 facing the sewage outlet 4 is arranged on the side wall of the liquid push arc tube 9. The cone head design of the discharge cone head 11 can increase the speed of the discharged water flow. A spray head tube group 12 facing the liquid push arc tube 9 is arranged on the liquid outlet side of the auxiliary liquid tube 10, so as to facilitate pushing the scale particles generated on the right side of the transfer water box 6 in the inner tank body 1 to the side of the spray head tube group 12, and the surfaces on both sides of the liquid push arc tube 9 form an eight-shaped structure, so as to facilitate the scale particles on the right side of the transfer water box 6 to pass over the right side surface of the liquid push arc tube 9. At the same time, the outer arc ring surface of the liquid push arc tube 9 is designed to fit the inner tank body 1, thereby improving the liquid push range of the discharge cone head 11.

[0034] Embodiment 2:

[0035] On the basis of the first embodiment, the slitting and scaling pushing component is further described, the slitting and scaling pushing component includes slitting knives 13 staggered on the rotating shaft 7, and scaling pushing brushes 14 are bonded or screwed and fixed between adjacent slitting knives 13 on the outer surface of the rotating shaft 7, the scaling pushing brush 14 is inclined, and the angle between the plane where the center line of the scaling pushing brush 14 is located and the plane where the horizontal line is located is 120°, the rotation of the rotating shaft 7 can drive the slitting knives 13 and the scaling pushing brush 14 to rotate respectively, and the slitting knives 13 cut the surrounding large particles of scale, and the rotation of the scaling pushing brush 14 can generate water flow in the direction of the sewage outlet 4, thereby pushing the cut scale particles to the periphery of the sewage outlet 4, and at the same time, the scaling pushing brush 14 can also directionally clean the cut scale particles to avoid the accumulation of scale particles.

[0036] Embodiment three:

[0037] On the basis of the first embodiment, the area of ​​the rotating shaft 7 is further described. A water-permeable isolation folded edge mesh plate 15 located above the rotating shaft 7 is arranged inside the inner tank body 1. The side of the water-permeable isolation folded edge mesh plate 15 has a folded edge portion, and the upper portion of the folded edge portion and the magnesium rod body 5 are arranged parallel to each other. A scale water inlet 16 is arranged on the upper end surface of the water-permeable isolation folded edge mesh plate 15. The scale water inlet 16 is located directly above the rotating shaft 7, and scale guide inclined plates 17 are arranged on the front and rear sides of the upper end surface of the scale water inlet 16. The ends of the scale guide inclined plates 17 extend and are fixed on the front and rear inner walls of the inner tank body 1. The scale guide inclined plates 17 can also be arranged into an arc-shaped structure that fits the inner wall of the inner tank body 1 to reduce the impact on the internal volume of the inner tank body 1. An isolation inclined plate cover 18 is arranged between the top end surface of the water-permeable isolation folded edge mesh plate 15 and the inner wall of the inner tank body 1. The isolation inclined plate cover 18 The design of the plate cover 18 prevents scale particles from accumulating above the magnesium rod body 5, and the isolating inclined plate cover 18 is an inclined L-shaped structure, and the angle between the plane where the upper end surface of the isolating inclined plate cover 18 is located and the plane where the horizontal line is located is 160°. The above-mentioned inclined design facilitates the scale particles falling on the isolating inclined plate cover 18 to slide freely to the side of the scale inlet 16 under the action of gravity. The drain outlet 4 and the magnesium rod body 5 are both located in the space formed by the inner tank body 1, the permeable isolation folded edge mesh plate 15 and the isolating inclined plate cover 18, so that the scale particles entering the scale inlet 16 are pushed to the side of the drain outlet 4 by the slitting knife 13 and the scale pushing brush 14 for temporary storage; a liquid guide block 19 is provided on the liquid outlet side of the drainage cone head 11, and the liquid guide block 19 can increase the diffusion range and flow rate of the water discharged by the drainage cone head 11.

[0038] Embodiment 4:

[0039] On the basis of the first embodiment, the auxiliary liquid pipe 10 is further explained. A ring box 20 is provided between the liquid inlet side of the auxiliary liquid pipe 10 and the transfer water box 6. A movable groove 21 is provided on the inner end side wall of the rotating shaft 7. A return spring sleeve rod 22 is movably inserted into the movable groove 21. The outer end of the return spring sleeve rod 22 is provided with a water blocking plate 23 located in the ring box 20. The return spring sleeve rod 22 can generate a spring thrust to the left side on the water blocking plate 23. When the rotating shaft 7 is not subjected to a large resistance from external scale, the return spring sleeve rod 22 overcomes the spring force and moves outward under the action of the centrifugal force generated by the rotation of the rotating shaft 7, thereby separating the water blocking plate 23 from the inner side wall of the ring box 20. At this time, the transfer water box 6, the ring box 20 and the auxiliary liquid pipe 10 are in a conductive state, and the water flowing into the transfer water box 6 will pass through the branch of the auxiliary liquid pipe 10 and the liquid spray head pipe Group 12 is sprayed out; if the rotating shaft 7 is subject to greater resistance from external scale, the water blocking plate 23 is fitted with the inner wall of the ring box 20 under the action of the return spring sleeve 22. At this time, the transfer water box 6, the ring box 20 and the auxiliary liquid pipe 10 are in a closed and blocked state. The rotation speed of the rotating shaft 7 can refer to the impeller speed of the hydroelectric generator driven by the water flow, which is recorded as the rotation speed A1. When the rotation speed of the rotating shaft 7 is less than half of A1, it means that the rotating shaft 7 is subject to greater resistance from external scale. At this time, the centrifugal force exerted on the return spring sleeve 22 is not enough to push the water blocking plate 23 to the right, and the ring box 20 is in a closed state, thereby making the water flow flowing into the transfer water box 6 more concentrated on the pushed water wheel blades 8, thereby increasing the rotation speed of the pushed water wheel blades 8, thereby quickly cutting the larger scale particles that are blocked under the action of the slitting knife 13.

[0040] An annular groove 24 is provided on the inner wall of the ring box 20, and a rolling ball 25 is symmetrically embedded and fixed on the side wall corresponding to the water blocking plate 23. The rolling ball 25 can rotate arbitrarily in the mounting groove on the water blocking plate 23. The water blocking plate 23 rotates in the annular groove 24 through the rolling ball 25, thereby dynamically blocking the water flow of the ring box 20.

[0041] A descaling method, used for the above electric water heater, comprises the following steps:

[0042] A, connect the transfer water box 6 to the water outlet end of the water inlet pipe 2, make the outer end of the rotating shaft 7 face the sewage outlet 4, adjust the outlet direction of the drainage cone head 11, and install the permeable isolation folding mesh plate 15 and the isolation inclined plate cover 18 at the same time, so that the sewage outlet 4 and the magnesium rod body 5 are located in the space formed by the inner tank body 1, the permeable isolation folding mesh plate 15 and the isolation inclined plate cover 18;

[0043] B. When the drain pipe 3 is in use, the tap water connected to the water inlet pipe 2 is pushed into the transfer water box 6 under the action of water pressure. The tap water flowing into the transfer water box 6 pushes the pushed water wheel blade 8 to rotate. The pushed water wheel blade 8 drives the slitting knife 13 and the scale pushing brush 14 on the rotating shaft 7 to rotate. After the scale particles in the inner tank body 1 are precipitated, they fall into the rotating shaft 7 area through the scale inlet 16 and are cut by the slitting knife 13. At the same time, the rotation of the scale pushing brush 14 can push the cut scale particles into the side of the sewage outlet 4.

[0044] C. The water flow discharged through the spray head tube group 12 on the auxiliary liquid pipe 10 can push the scale on the right side of the bottom end of the inner tank body 1 toward the scale water inlet 16. At the same time, the discharge cone head 11 located on the liquid push arc tube 9 pushes the scale inside the inner tank body 1 toward the drain outlet 4. Finally, the accumulated scale particles are cleaned centrally by opening the drain outlet 4.

[0045] The working principle is as follows: during the use of the electric water heater, if the water outlet end of the drain pipe 3 is in an open state, the external tap water of the water inlet pipe 2 will automatically enter the transfer water box 6 under the action of water pressure, and the tap water flowing into the transfer water box 6 will push the pushed water wheel paddle 8 to rotate under the action of water pressure. At this time, the water blocking plate 23 and the inner wall of the ring box 20 are separated, and the ring box 20 is in a conductive state. The rotation of the pushed water wheel paddle 8 will drive the slitting knife 13 and the scale pushing brush 14 on the rotating shaft 7 to rotate, and the scale particles generated by heating in the inner tank body 1 will settle. The water flow passing through the transfer water box 6 will flow into the liquid push arc tube 9 and the auxiliary liquid tube 10 respectively, and the discharge cone head 11 on the liquid push arc tube 9 sprays water to the inner tank body 1, the scale particles generated on the left side of the inner tank body 1 are pushed toward the sewage outlet 4 through the scale inlet 16, and the liquid guide block 19 located in the discharge cone head 11 increases the range and flow rate of the sprayed water flow, and the water flow passing through the auxiliary liquid pipe 10 finally flows toward the liquid push arc tube 9 through the spray head pipe group 12, thereby pushing the scale particles on the right side of the inner tank body 1 into the scale inlet 16 side on the water-permeable isolation folding mesh plate 15, and the rotation of the slitting knife 13 and the scale pushing brush 14 can cut and push the incoming scale particles, and the cut scale particles are pushed to the sewage outlet 4 side for temporary storage under the left water flow generated by the scale pushing brush 14, and finally the operator can centrally clean the scale particles by opening the sewage outlet 4.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric water heater, comprising an inner tank body (1) and a water inlet pipe (2), a drain pipe (3) and a sewage outlet (4) respectively arranged at the bottom end thereof, wherein a magnesium rod (5) is sealed and inserted in the sewage outlet (4), characterized in that: The inner bottom end of the inner tank (1) is provided with a transfer water box (6) connected to the water inlet pipe (2), a rotating shaft (7) is rotatably penetrated through a bearing hole on the side wall of the transfer water box (6), and the inner and outer ends of the rotating shaft (7) are respectively sleeved with a pushed water wheel blade (8) and a splitting and pushing scale component. The water flow discharged from the water inlet pipe (2) into the transfer water box (6) drives the rotating shaft (7) to rotate through the pushed water wheel blade (8), thereby causing the splitting and pushing scale component to split the surrounding precipitated scale particles and push them to the side of the sewage outlet (4); The top wall and the other side wall of the transfer water box (6) are connected to a liquid push arc tube (9) and an auxiliary liquid tube (10), respectively; the side wall of the liquid push arc tube (9) is connected to a liquid discharge cone head (11) facing the sewage outlet (4); the liquid outlet side of the auxiliary liquid tube (10) is provided with a liquid spray head tube group (12) facing the liquid push arc tube (9); A ring box (20) is provided between the liquid inlet side of the auxiliary liquid pipe (10) and the transfer water box (6); a movable groove (21) is provided on the inner side wall of the rotating shaft (7); a return spring sleeve rod (22) is movably inserted in the movable groove (21); a water blocking plate (23) located in the ring box (20) is provided at the outer end of the return spring sleeve rod (22); when the rotating shaft (7) is not subjected to a large resistance from external scale, the return spring sleeve rod (22) is rotated by the centrifugal force generated by the rotation of the rotating shaft (7) Under the action of the force, the water blocking plate (23) overcomes the spring force and moves outward, thereby separating the water blocking plate (23) from the inner wall of the ring box (20). At this time, the intermediate water box (6), the ring box (20) and the auxiliary liquid pipe (10) are in a conductive state. If the rotating shaft (7) is subjected to a large resistance from external scale, the water blocking plate (23) fits the inner wall of the ring box (20) under the action of the return spring sleeve rod (22). At this time, the intermediate water box (6), the ring box (20) and the auxiliary liquid pipe (10) are in a closed and blocked state.

2. The electric water heater according to claim 1, characterized in that: The cutting and pushing scale component comprises cutting knives (13) arranged in a staggered manner on the rotating shaft (7); a pushing scale brush (14) is arranged on the outer surface of the rotating shaft (7) between adjacent cutting knives (13); the pushing scale brush (14) is arranged in an inclined manner; the rotation of the rotating shaft (7) can respectively drive the cutting knives (13) and the pushing scale brush (14) to rotate; the cutting knives (13) cut large scale particles in the surrounding area, and the rotation of the pushing scale brush (14) can generate a water flow in the direction of the sewage outlet (4), thereby pushing the cut scale particles into the surrounding area of ​​the sewage outlet (4).

3. The electric water heater according to claim 1, characterized in that: The inner tank body (1) is provided with a water-permeable isolation folded edge mesh plate (15) located above the rotating shaft (7); the upper end surface of the water-permeable isolation folded edge mesh plate (15) is provided with a scale water inlet (16); and scale guide inclined plates (17) are provided on the front and rear sides of the upper end surface of the scale water inlet (16); an isolation inclined plate cover (18) is provided between the top end surface of the water-permeable isolation folded edge mesh plate (15) and the inner side wall of the inner tank body (1); and the sewage outlet (4) and the magnesium rod body (5) are both located in a space formed by the inner tank body (1), the water-permeable isolation folded edge mesh plate (15) and the isolation inclined plate cover (18).

4. The electric water heater according to claim 1, characterized in that: A liquid guiding block (19) is provided on the liquid outlet side of the liquid discharge cone head (11), and the liquid guiding block (19) can increase the diffusion range and flow rate of the water flow discharged from the liquid discharge cone head (11).

5. The electric water heater according to claim 1, characterized in that: An annular groove (24) is provided on the inner side wall of the ring box (20), and rolling balls (25) are symmetrically provided on the corresponding side wall of the water blocking plate (23). The water blocking plate (23) is rotated in the annular groove (24) by the rolling balls (25), thereby dynamically blocking the water flow of the ring box (20).

6. A descaling method for the electric water heater according to any one of claims 1 to 5, characterized in that: The steps include: A, connect the transfer water box (6) to the water outlet end of the water inlet pipe (2), make the outer end of the rotating shaft (7) face the sewage outlet (4), adjust the outlet direction of the drainage cone head (11), and install the water-permeable isolation folded edge mesh plate (15) and the isolation inclined plate cover (18) at the same time, so that the sewage outlet (4) and the magnesium rod body (5) are located in the space formed by the inner tank body (1), the water-permeable isolation folded edge mesh plate (15) and the isolation inclined plate cover (18); B. When the drain pipe (3) is in use, the tap water connected to the water inlet pipe (2) is pushed into the transfer water box (6) under the action of water pressure. The tap water flowing into the transfer water box (6) pushes the pushed water wheel blade (8) to rotate. The pushed water wheel blade (8) drives the slitting knife (13) and the scale pushing brush (14) on the rotating shaft (7) to rotate. The scale particles in the inner tank body (1) are precipitated and fall into the rotating shaft (7) area through the scale inlet (16) and are cut by the slitting knife (13). At the same time, the rotation of the scale pushing brush (14) can push the cut scale particles into the sewage outlet (4). C. The water discharged through the liquid spray head pipe group (12) on the auxiliary liquid pipe (10) can push the scale on the right side of the bottom end of the inner tank body (1) toward the scale inlet (16). At the same time, the liquid discharge cone head (11) located on the liquid push arc tube (9) pushes the scale inside the inner tank body (1) toward the sewage outlet (4). Finally, the sewage outlet (4) is opened to centrally clean the accumulated scale particles.

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