Heat exchanger and water heater

Abstract

The invention discloses a heat exchanger and a water heater, belongs to the field of heat exchange, and aims to solve the problems that most bubbles are attached to the surface of a heating rod, natural flowing impact force of liquid is weak, only a small amount of unattached free bubbles can be taken away, and the bubbles which are tightly attached to the surface of the heating rod are difficult to effectively remove, so that the effect of an existing liquid inlet and outlet bubble removing mode is extremely limited. The heat exchanger comprises a base, one side of the upper portion of the base is fixedly connected with a first water inlet tank, the two ends of the first water inlet tank are communicated with first water inlet pipes, the other side of the upper portion of the base is fixedly connected with a second water inlet tank, and the two ends of the second water inlet tank are communicated with second water inlet pipes. Inlet water flows in a spiral state through the driving mechanism, radial centrifugal force, circumferential shear force and axial propulsive force are generated, bubbles on the surface of the heating rod can be effectively stripped and taken away under the combined action, therefore, coverage of the bubbles on the heating rod is reduced, and the service life of the heating rod is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchange, in particular to a heat exchanger and a water heater. BACKGROUND

[0002] In the field of industrial production, domestic hot water supply, etc., the heat exchanger with heating rod as the core heating element is widely used in liquid heating scenarios due to its simple structure, convenient temperature control and other advantages. In order to meet the heating power demand and heat exchange efficiency target under different working conditions, the existing heat exchanger usually adopts a "complicated" heating rod layout in the heat exchange box. Through the staggered arrangement and layered setting of multiple heating rods, the contact area of the heating rod and the liquid is maximized, which can theoretically realize the rapid transfer of heat to the liquid. However, this complex layout faces the problem of shortened service life of the heating rod caused by bubble generation in actual operation. When the heating rod is working, the surface temperature of the heating rod will rise rapidly according to the heating power. If the local temperature exceeds the saturation vaporization temperature of the liquid, the area where the liquid contacts the surface of the heating rod will instantly undergo a vaporization reaction, forming a large number of tiny bubbles. These bubbles will adhere to the surface of the heating rod and gradually form a "bubble cover layer" in the local area of the heating rod as the heating process continues. The key problem is that the thermal conductivity of the bubble is much lower than that of the liquid. The thermal conductivity of air is only about 0.026 W / (m·K), which is much lower than that of water, 0.6 W / (m·K). Once the surface of the heating rod is covered with bubbles, the heat in this area will be difficult to transfer to the liquid, resulting in a local overheating state similar to dry burning. This overheating will damage the corrosion-resistant coating or insulating layer on the surface of the heating rod, accelerate the oxidation and embrittlement of the metal substrate of the heating rod, and even cause the internal heating wire of the heating rod to melt, which seriously shortens the service life of the heating rod, increases the equipment maintenance cost and downtime risk. To alleviate this problem, the existing heat exchanger mainly relies on the natural inflow and outflow of the liquid to carry away part of the bubbles, that is, the cold water enters from the water inlet and scours the surface of the heating rod, and the hot water carries a small amount of suspended bubbles when it is discharged from the water outlet. However, due to the complex layout of the heating rod, the flow path of the liquid in the heat exchange box is easily blocked by the heating rod, forming local flow dead angles. At the same time, the bubbles are mostly attached to the surface of the heating rod, and the natural flow impact of the liquid is weak, which can only carry away a small amount of free bubbles that are not attached. It is difficult to effectively remove the bubbles that are closely attached to the surface of the heating rod. Therefore, the effect of the existing liquid inflow and outflow bubble removal method is very limited, and the service life of the heating rod is shortened.

[0003] To solve the above problems, a heat exchanger and a water heater are proposed. SUMMARY

[0004] The heat exchanger and the water heater solve the problem of limited effect of the liquid inlet and outlet bubble removing mode and shortened service life of the heating rod.

[0005] To achieve the above object, the application provides the following technical scheme: a heat exchanger comprising a base, a first water inlet tank fixedly connected to one side of the upper portion of the base, first water inlet pipes communicated with both ends of the first water inlet tank, a second water inlet tank fixedly connected to the other side of the upper portion of the base, and second water inlet pipes communicated with both ends of the second water inlet tank.

[0006] A water heater comprising a heating tank and a heat exchanger, a rotating mechanism arranged below the heating tank, a pushing mechanism arranged between the rotating mechanism and the heating tank, a water outlet pipe communicated with the upper end of the heating tank, and a heating rod arranged on the inner side of the heating tank. The rotating mechanism comprises a rotating assembly and a spiral assembly, and the spiral assembly is arranged above the rotating assembly. The rotating assembly comprises a support frame fixedly connected to the upper portion of the middle of the base and fixedly connected to the heating tank, a first support plate fixedly connected to the inner side of the support frame, a motor fixedly connected to the upper portion of the first support plate, a rotating shaft fixedly connected to the output end of the motor, a first rotating disc fixedly connected to the upper end of the rotating shaft, a second support plate fixedly connected to the lower surface of the base, a first hole arranged in the inner portion of the second support plate, a first guide groove formed in the outer side surface of the first rotating disc, a second guide groove communicated with one end of the first guide groove, a first rotating plate arranged on the outer side surface of the first rotating disc, a first guide rod fixedly connected to the first rotating plate and arranged in the inner side of the first guide groove, and a pushing rod fixedly connected to the first rotating plate and arranged in the inner side of the first hole.

[0007] The first guide groove is horizontally arc-shaped, and two first guide grooves are formed in the outer side surface of the first rotating disc.

[0008] The second guide groove is obliquely arc-shaped, two second guide grooves are formed in the outer side surface of the first rotating disc, and the directions of the two second guide grooves are opposite.

[0009] The pushing rod is cuboid, and the outer side surface of the pushing rod is attached to the inner side surface of the first hole.

[0010] The screw assembly comprises a water inlet opening formed in the middle outer side of the heating box and communicated with the first water inlet pipe and the second water inlet pipe, the upper end of the push rod is fixedly connected with a first push plate, a second hole is formed in the lower outer side of the heating box, a first sealing gasket is fixedly connected to the inner side of the second hole, the push rod is nested with the inner side of the first sealing gasket, a fixed rod is fixedly connected to the upper end of the first push plate, a second rotating plate is rotatably connected to the upper outer side of the inner side of the heating box, a first groove is arranged on the inner side of the second rotating plate, a third guide slot is formed on the inner wall of the first groove, the outer appearance structure of the third guide slot is in a spiral shape, the fixed rod is nested in the inner side of the first groove, and a third guide rod fixedly connected with the fixed rod is arranged in the inner side of the third guide slot.

[0011] The fixed rods are equidistantly distributed along the central axis of the first push plate, and the central axis of the fixed rod is perpendicular to the central axis of the rotating shaft.

[0012] The outer appearance structure of the fixed rod is in a cylindrical shape, and the outer side surface of the fixed rod is attached to the inner side surface of the first groove.

[0013] The push mechanism comprises a second rotating disc fixedly connected to the upper end of the first rotating disc, a fifth hole is formed in the middle inner side of the push rod and used for nesting the second rotating disc, a fourth guide slot is formed on the outer side surface of the second rotating disc, fifth guide slots are communicated with both ends of the fourth guide slot, the outer appearance structure of the fifth guide slot is in an inclined circular arc shape, and the fifth guide slots at both ends are opposite to each other, a sleeve is nested on the outer side of the second rotating disc, a third supporting plate is fixedly connected to the middle of the lower surface of the heating box, a third hole is arranged in the inner side of the third supporting plate, a second push rod is fixedly connected to the upper surface of the sleeve, a fourth hole is arranged in the middle inner side of the lower part of the heating box, the outer appearance structure of the second push rod is in a cuboid shape, and the outer side surface of the second push rod is attached to the inner side surface of the fourth hole, a second sealing ring is fixedly connected to the inner side of the fourth hole, a second push plate is fixedly connected to the upper end of the second push rod, and a fourth guide rod fixedly connected with the sleeve is arranged in the inner side of the fifth guide slot.

[0014] The outer appearance structure of the fourth guide slot is in a horizontal circular arc shape, and the fourth guide rod and the fourth guide slot are in a clearance fit.

[0015] 1. Compared with the prior art, the beneficial effects of the present application are that the water flow is in a spiral state through the driving mechanism, radial centrifugal force, circumferential shear force and axial thrust force are generated, and the combined action can effectively strip and carry away the bubbles on the surface of the heating rod, thereby reducing the coverage of the bubbles on the heating rod and prolonging the service life of the heating rod.

[0016] 2. The spiral water flow generated by the present application can more widely contact the surface of the heating rod compared with the straight-line water flow, and is especially suitable for heating rods with complex shapes, thereby strengthening the cleaning effect of the bubbles and impurities on the surface of the heating rod and further improving the thermal efficiency and equipment life.

[0017] 3. The present application increases the number of times of direct heat exchange between water and heating rods by making part of the water flow rotate again to contact the heating rods when the spiral water flow passes between the heating rods, instead of directly flowing through, thereby improving the heating efficiency.

[0018] 4. The present application prolongs the residence path of the bubbles in the water area by the spiral flow, and makes the bubbles have more sufficient time to float up by using their own buoyancy; at the same time, the double spiral water flow collides in the center, making the bubbles tend to gather at the central outlet pipe position, thereby facilitating the concentration of the bubbles and reducing the residence and re-attachment of the bubbles in the heating area.

[0019] 5. The present application further assists the upward movement of the bubbles and the discharge from the outlet pipe by providing additional upward power for the bubbles to separate from the heating rods when the double water flow collides, thereby strengthening the bubble removal effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall three-dimensional structure of the present application; Figure 2 is a schematic diagram of the front view of the heating box of the present application; Figure 3 is a schematic diagram of the appearance structure of the first rotating disc of the present application; Figure 4 is a schematic diagram of the appearance structure of the first rotating disc of the present application; Figure 3 is a schematic diagram of the structure at position A of the present application; Figure 5 is a schematic diagram of the front view of the first guide groove of the present application; Figure 6 is a schematic diagram of the rear view of the first guide groove of the present application; Figure 7 is a schematic diagram of the front view of the fourth guide groove of the present application; Figure 8 is a schematic diagram of the second rotating disc of the present application.

[0021] In the figure: 1, base; 2, first water inlet tank; 3, first water inlet pipe; 4, second water inlet tank; 5, second water inlet pipe; 6, heating tank; 7, rotating mechanism; 8, pushing mechanism; 9, water outlet pipe; 10, heating rod; 71, rotating assembly; 72, spiral assembly; 7101, support frame; 7102, first support plate; 7103, motor; 7104, rotating shaft; 7105, first rotating disc; 7106, second support plate; 7107, first hole; 7108, first guide groove; 7109, second guide groove; 7110, first rotating plate; 7111, first guide rod; 7112, pushing rod; 7201, water inlet; 7202, first push plate; 7203, second hole; 7204, first sealing gasket; 7205, fixing rod; 7206, second rotating plate; 7207, first recess; 7208, third guide groove; 7209, third guide rod; 801, second rotating disc; 802, fifth hole; 803, fourth guide groove; 804, fifth guide groove; 805, sleeve; 806, third support plate; 807, third hole; 808, second pushing rod; 809, fourth hole; 810, second sealing ring; 811, second push plate; 812, fourth guide rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0023] Please refer to Figures 1-8 The present application provides a technical solution: a heat exchanger, comprising a base 1, a first water inlet tank 2 is fixedly connected to one side of the upper portion of the base 1, first water inlet pipes 3 are communicated to both ends of the first water inlet tank 2, a second water inlet tank 4 is fixedly connected to the other side of the upper portion of the base 1, and second water inlet pipes 5 are communicated to both ends of the second water inlet tank 4.

[0024] A water heater, comprising a heating tank 6 and a heat exchanger, a rotating mechanism 7 is arranged below the heating tank 6, a pushing mechanism 8 is arranged between the rotating mechanism 7 and the heating tank 6, a water outlet pipe 9 is communicated to the upper end of the heating tank 6, and a heating rod 10 is arranged inside the heating tank 6. The rotating mechanism 7 comprises a rotating assembly 71 and a spiral assembly 72, and the spiral assembly 72 is arranged above the rotating assembly 71. The rotating assembly 71 comprises a support frame 7101 fixedly connected above the middle of the base 1 and fixedly connected with the heating box 6, the inner side of the support frame 7101 is fixedly connected with a first support plate 7102, the upper side of the first support plate 7102 is fixedly connected with a motor 7103, the output end of the motor 7103 is fixedly connected with a rotating shaft 7104, the upper end of the rotating shaft 7104 is fixedly connected with a first rotating disc 7105, the lower surface of the base 1 is fixedly connected with a second support plate 7106, the inside of the second support plate 7106 is provided with a first hole 7107, the outer side surface of the first rotating disc 7105 is provided with a first guide groove 7108, one end of the first guide groove 7108 is communicated with a second guide groove 7109, the outer side surface of the first rotating disc 7105 is provided with a first rotating plate 7110, the inner side of the first guide groove 7108 is provided with a first guide rod 7111 fixedly connected with the first rotating plate 7110, the outer appearance structure of the first guide groove 7108 is a horizontal circular arc, and two first guide grooves 7108 are arranged on the outer side surface of the first rotating disc 7105, so that the first guide rod 7111 does not move up and down when moving in the first guide groove 7108, the inner side of the first hole 7107 is provided with a push rod 7112 fixedly connected with the first rotating plate 7110, the outer side structure of the second guide groove 7109 is an inclined circular arc, two second guide grooves 7109 are arranged on the outer side surface of the first rotating disc 7105, and the directions of the two second guide grooves 7109 are opposite, so that the first guide rod 7111 can move up and down when moving in the second guide groove 7109, the outer appearance structure of the push rod 7112 is a cuboid, and the outer side surface of the push rod 7112 is in sliding fit with the inner side surface of the first hole 7107, so that the push rod 7112 does not rotate when moving in the first hole 7107.

[0025] The screw assembly 72 comprises a water inlet 7201 formed in the middle outer side of the heating box 6 and communicated with the first water inlet pipe 3 and the second water inlet pipe 5, the upper end of the push rod 7112 is fixedly connected with a first push plate 7202, a second hole 7203 is formed in the lower outer side of the heating box 6, the inner side of the second hole 7203 is fixedly connected with a first sealing gasket 7204, the push rod 7112 is nested with the inner side of the first sealing gasket 7204, the upper end of the first push plate 7202 is fixedly connected with a fixed rod 7205, a plurality of fixed rods 7205 are equidistantly distributed along the central axis of the first push plate 7202, and the central axis of the fixed rod 7205 is perpendicular to the central axis of the rotating shaft 7104, a second rotating plate 7206 is rotatably connected to the inner side of the upper outer side of the heating box 6, the inner side of the second rotating plate 7206 is provided with a first groove 7207, a third guide groove 7208 is formed in the inner wall of the first groove 7207, the outer appearance structure of the third guide groove 7208 is spiral, the fixed rod 7205 is nested in the inner side of the first groove 7207, the third guide groove 7208 is provided with a third guide rod 7209 fixedly connected with the fixed rod 7205, the outer appearance structure of the fixed rod 7205 is cylindrical, and the outer side surface of the fixed rod 7205 is in sliding fit with the inner side surface of the first groove 7207, so that the fixed rod 7205 does not shake when moving in the inner side of the first groove 7207.

[0026] The push mechanism 8 comprises a second rotating disc 801 fixedly connected to the upper end of the first rotating disc 7105, a fifth hole 802 is formed in the middle inner side of the push rod 7112 for nesting the second rotating disc 801, a fourth guide groove 803 is formed in the outer side surface of the second rotating disc 801, both ends of the fourth guide groove 803 are communicated with a fifth guide groove 804, the outer appearance structure of the fifth guide groove 804 is an inclined circular arc, and the fifth guide grooves 804 at both ends are opposite to each other, so that the fourth guide rod 812 can move up and down when moving in the inner side of the fifth guide groove 804, a sleeve 805 is nested on the outer side of the second rotating disc 801, a third supporting plate 806 is fixedly connected to the middle of the lower surface of the heating box 6, the inner side of the third supporting plate 806 is provided with a third hole 807, a second push rod 808 is fixedly connected to the upper surface of the sleeve 805, a fourth hole 809 is formed in the middle inner side of the lower part of the heating box 6, the outer appearance structure of the second push rod 808 is a rectangular solid, and the outer side surface of the second push rod 808 is in sliding fit with the inner side surface of the fourth hole 809, the inner side of the fourth hole 809 is fixedly connected with a second sealing ring 810, the upper end of the second push rod 808 is fixedly connected with a second push plate 811, the inner side of the fifth guide groove 804 is provided with a fourth guide rod 812 fixedly connected with the sleeve 805, the outer appearance structure of the fourth guide groove 803 is a horizontal circular arc, and the fourth guide rod 812 and the fourth guide groove 803 are in clearance fit, so that the fourth guide rod 812 does not move up and down when moving in the inner side of the fourth guide groove 803.

[0027] When water needs to be heated, the first water inlet tank 2 is started through an external controller to make the water needing to be heated enter the water inlet 7201 of the heating tank 6 from the first water inlet pipe 3, so that the water needing to be heated enters the inside of the heating tank 6. At this time, the motor 7103, the rotating shaft 7104 and the first rotating disc 7105 are started to rotate, driving the first guide groove 7108 and the second guide groove 7109 outside the first rotating disc 7105 to move. Since the outside structure of the second guide groove 7109 is an inclined circular arc, and the second guide groove 7109 is opened on the outside of the first rotating disc 7105, and the directions of the two second guide grooves 7109 are opposite, one of the first guide rods 7111 is in contact with the second guide groove 7109, and the other first guide rod 7111 moves to the inside of the corresponding first guide groove 7108, so that the first guide rod 7111 moving to the inside of the second guide groove 7109 is moved upward by the second guide groove 7109, thereby driving the first rotating plate 7110 and the push rod 7112 to move upward, so that the first push plate 7202 at the upper end of the push rod 7112 moves upward, thereby driving the fixed rod 7205 and the third guide rod 7209 to move upward. Since the appearance structure of the third guide groove 7208 is a spiral shape, and the second rotating plate 7206 is rotatably connected with the heating tank 6, the second rotating plate 7206 rotates, so that the water of the first water inlet pipe 3 is rotated by the second rotating plate 7206 from the water inlet 7201, so that the water of the first water inlet pipe 3 is in contact with the heating rod 10 in a spiral state. After the water enters for a period of time, the motor 7103 is started to rotate in the opposite direction. At this time, the second water inlet tank 4 and the second water inlet pipe 5 enter water. At this time, the first guide rod 7111 moving upward is pushed downward by the corresponding second guide groove 7109, and the other first guide rod 7111 is still in the inside of the corresponding first guide groove 7108. When the first guide rod 7111 moving upward moves to the inside of the corresponding first guide groove 7108, the other first guide rod 7111 moves to the inside of the corresponding second guide groove 7109 and moves upward, thereby driving the corresponding second rotating plate 7206 to rotate, so that the second water inlet pipe 5 enters water in a spiral state and is in contact with the heating rod 10. Since the water of the heating rod 10 is in a spiral state, three kinds of forces generated by spiral flow are produced, radial centrifugal force: when the water flow moves along the spiral path, the centrifugal effect produces an outward "throwing force", which "pulls outward" the bubbles attached to the surface of the heating rod 10, directly tearing the contact surface of the bubbles and the rod; circumferential shear force: when the water flow rotates around the heating rod 10, a "shearing action" along the circumferential direction of the rod is formed, which continuously scrapes the edge of the bubble like a "scraper", thereby destroying the integrity of the bubble;Axial propulsion force: the water flow advances in the axial direction at the same time, quickly taking the stripped bubbles away from the heating area. Compared with directly pushing the water to the heating rod 10, there are two directional forces, so that the bubbles can easily escape from the bondage of the heating rod 10, reduce the number of bubbles on the heating rod 10, and improve the service life of the heating rod 10.

[0028] Similarly, due to the three forces generated by the spiral flow, the impurity cleaning effect on the heating rod 10 is better.

[0029] Because the water around the heating rod 10 is in a spiral state, the range of the spiral flow contacting the heating rod 10 in a single time is wider, and for more complex heating rods 10, the bubbles on the surface of the heating rod 10 can be better contacted and detached, reducing the number of bubbles on the heating rod 10 and improving the service life of the heating rod 10.

[0030] Because the water around the heating rod 10 is in a spiral state, the spiral water flow passes between the two heating rods 10, and because the direction is rotating, the water flow passing between the two heating rods 10 will rotate back to directly contact the heating rod 10, and will not pass through the middle and then be heated by water heat conduction. Improve the number of direct contact between the heating rod 10 and the water, and improve the heating efficiency.

[0031] Because the water around the heating rod 10 is in a spiral state, the bubbles will not move in a straight line to the next heating rod 10, and the contact time with the next heating rod 10 will be longer. Because the mass of the bubble is smaller than that of the water, it will float up, prolong the contact time with the next heating rod 10, so that the bubble has more time to float up, rather than contacting the next heating rod 10 again, improving the probability of bubble floating up, reducing the probability of bubble participating in the next heating rod 10 contact, reducing the probability of heating rod 10 and bubble coverage, and improving the service life of the heating rod 10.

[0032] Because the water inlet 7201 is simultaneously water-inletting when the water is inletting, the spiral water will collide in the middle, reducing the pushing of the bubbles to the inner wall side of the heating box 6, and the direction of the colliding water flow is more, so that the effect of the bubbles escaping from the heating rod 10 is better.

[0033] Because of the reasons such as more stable water outlet of the water outlet pipe 9, it is more inclined to locate the water outlet pipe 9 at the middle position of the heating box 6, and the spiral water will collide in the middle, so that the bubbles can stay in the middle position with a high probability, and it is more convenient to discharge from the position of the water outlet pipe 9, reduce the retention of bubbles, and reduce the probability of bubbles returning to the heating rod 10.

[0034] When the first rotating disc 7105 rotates, the fourth guide groove 803 and the fifth guide groove 804 are driven to rotate. The fifth guide groove 804 has an inclined circular arc structure, and the fourth guide groove 803 has a horizontal circular arc structure. When the fourth guide rod 812 moves to the inner side of the fifth guide groove 804, the fourth guide rod 812 moves upward, driving the sleeve 805, the second push rod 808, and the second push plate 811 to move upward, pushing the water upward. The fourth guide rod 812 is moved upward for a certain time according to the arc length of the fourth guide groove 803. When the spiral water collides in the middle, the second push plate 811 can push the impact force upward, so that the bubbles can also move upward, reducing the probability of downward movement of the bubbles, making it easier to discharge from the position of the water outlet 9, reducing the retention of bubbles, and reducing the probability of bubbles returning to the heating rod 10.

[0035] When the second push plate 811 moves upward, an upward movement force is provided, so that the bubbles can easily escape from the constraint of the heating rod 10, reducing the number of bubbles on the heating rod 10, and improving the service life of the heating rod 10.

[0036] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0037] Although embodiments of the present application 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 therein without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger comprising a base (1), characterised in that: The upper side of the base (1) is fixedly connected with a first water inlet tank (2), both ends of the first water inlet tank (2) are communicated with a first water inlet pipe (3), the other upper side of the base (1) is fixedly connected with a second water inlet tank (4), both ends of the second water inlet tank (4) are communicated with a second water inlet pipe (5).

2. A water heater comprising a heating tank (6) and a heat exchanger according to claim 1, characterized in that: The lower side of the heating tank (6) is provided with a rotating mechanism (7), the rotating mechanism (7) and the heating tank (6) are provided with a pushing mechanism (8), the upper end of the heating tank (6) is communicated with a water outlet pipe (9), the inner side of the heating tank (6) is provided with a heating rod (10); The rotating mechanism (7) comprises a rotating assembly (71) and a spiral assembly (72), and the spiral assembly (72) is arranged above the rotating assembly (71); The rotating assembly (71) comprises a support frame (7101) fixedly connected to the middle upper side of the base (1) and fixedly connected with the heating tank (6), a first support plate (7102) fixedly connected to the inner side of the support frame (7101), a motor (7103) fixedly connected to the upper side of the first support plate (7102), a rotating shaft (7104) fixedly connected to the output end of the motor (7103), a first rotating disc (7105) fixedly connected to the upper end of the rotating shaft (7104), a second support plate (7106) fixedly connected to the lower surface of the base (1), a first hole (7107) arranged in the second support plate (7106), a first guide groove (7108) formed in the outer side of the first rotating disc (7105), a second guide groove (7109) communicated with one end of the first guide groove (7108), a first rotating plate (7110) arranged on the outer side of the first rotating disc (7105), a first guide rod (7111) fixedly connected to the first rotating plate (7110) and arranged in the first guide groove (7108), and a pushing rod (7112) fixedly connected to the first rotating plate (7110) and arranged in the first hole (7107).

3. A water heater as claimed in claim 2 wherein: The appearance structure of the first guide groove (7108) is a horizontal circular arc, and two first guide grooves (7108) are formed in the outer side of the first rotating disc (7105).

4. A water heater as claimed in claim 2 wherein: The outer side structure of the second guide groove (7109) is an inclined circular arc, two second guide grooves (7109) are formed in the outer side of the first rotating disc (7105), and the directions of the two second guide grooves (7109) are opposite.

5. A water heater as claimed in claim 2 wherein: The appearance structure of the pushing rod (7112) is a cuboid, and the outer side of the pushing rod (7112) is attached to the inner side of the first hole (7107).

6. A water heater as claimed in claim 2 wherein: Said screw assembly (72) including has opened in the middle outside heating box (6) and first water inlet pipe (3) and second water inlet pipe (5) communication water inlet (7201), the upper end of the push rod (7112) is fixedly connected with first push plate (7202), the lower outside of heating box (6) is internally provided with second hole (7203), the inner side of second hole (7203) is fixedly connected with first gasket (7204), the push rod (7112) is nested with the inner side of first gasket (7204), the upper end of first push plate (7202) is fixedly connected with fixed rod (7205), the upper outside of heating box (6) is rotatably connected with second rotating plate (7206), the inner side of second rotating plate (7206) is provided with first recess (7207), the inner wall of first recess (7207) is provided with third guide slot (7208), the appearance structure shape of third guide slot (7208) is spiral, the fixed rod (7205) is nested in the inner side of first recess (7207), the third guide slot (7208) inner side is provided with the third guide rod (7209) of fixedly connected with fixed rod (7205).

7. A water heater as claimed in claim 6 wherein: The fixed rod (7205) is equidistantly distributed with a plurality of along the central axis of first push plate (7202), and the central axis of fixed rod (7205) is perpendicular to the central axis of rotating shaft (7104).

8. A water heater as claimed in claim 6 wherein: The fixed rod (7205) is cylindrical in appearance structure, and the outer side of fixed rod (7205) is attached to the inner side of first recess (7207).

9. A water heater as claimed in claim 2 wherein: The push mechanism (8) includes a second rotating disc (801) fixedly connected to the upper end of the first rotating disc (7105), a fifth hole (802) is formed in the middle of the push rod (7112) for nesting the second rotating disc (801), a fourth guide groove (803) is formed on the outer side of the second rotating disc (801), both ends of the fourth guide groove (803) are communicated with fifth guide grooves (804), the fifth guide grooves (804) are inclined circular arcs in appearance structure, and the fifth guide grooves (804) at both ends face opposite directions, a sleeve (805) is nested on the outer side of the second rotating disc (801), a third supporting plate (806) is fixedly connected to the middle of the lower surface of the heating box (6), a third hole (807) is arranged in the third supporting plate (806), a second push rod (808) is fixedly connected to the upper surface of the sleeve (805), a fourth hole (809) is arranged in the middle of the lower part of the heating box (6), the second push rod (808) is a cuboid in appearance structure, and the outer side of the second push rod (808) is attached to the inner side of the fourth hole (809), a second sealing ring (810) is fixedly connected to the inner side of the fourth hole (809), a second push plate (811) is fixedly connected to the upper end of the second push rod (808), and a fourth guide rod (812) fixedly connected to the sleeve (805) is arranged in the fifth guide groove (804).

10. A water heater as claimed in claim 9 wherein: The fourth guide groove (803) is a horizontal circular arc in appearance structure, and the fourth guide rod (812) is in clearance fit with the fourth guide groove (803).

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