Quick heating structure of double-tank electric water heater

Abstract

The utility model discloses a kind of quick heating structure of double-tank electric water heater, including first inner container, second inner container, first inner container heater, second inner container heater, water outlet pipe and water inlet pipe.The first inner container of the quick heating structure of double-tank electric water heater is heated by first inner container heater, second inner container is heated by second inner container heater, electric water heater can obtain the hot water of set temperature value faster, shorten heating time.Moreover, first inner container heater includes 3D heating pipe and upper-tank heating pipe, 3D heating pipe is used to heat the upper layer water body of first inner container, and upper-tank heating pipe is used to heat the lower layer water body of first inner container, so that in the heat convection process of double-tank electric water heater, first inner container upper layer, first inner container lower layer and second inner container lower layer three positions all have heating source, to heat more quickly and stably.

Description

Technical Field

[0001] This utility model relates to the field of electric water heaters, and in particular to a rapid heating structure for a dual-tank electric water heater. Background Technology

[0002] The hot water output of an electric water heater is limited by the capacity of its inner tank. Before use, the water heater needs to preheat the water in the inner tank. After a user takes a shower, most of the hot water in the inner tank will be consumed. Therefore, while the hot water is being used, the electric water heater also simultaneously replenishes the inner tank with cooler tap water for heating to replenish the hot water supply.

[0003] In existing technologies, most electric water heaters employ submerged heating technology. Because hot and cold water have different densities, they separate into layers. Submerged heating technology utilizes the fact that cold water, being denser than hot water, tends to collect at the bottom. A heating element is installed at the bottom to heat the cold water there, raising its temperature. The heated water then flows upwards towards the top of the tank, while the cooler water flows downwards, achieving a more even heating effect.

[0004] However, when a large amount of hot water is consumed, the tap water replenishing the inner tank is at a low temperature. The water in the upper part of the inner tank, lacking a heating element, cannot be heated and must wait for the tap water in the lower part of the tank to heat up, creating convection between the upper and lower sections. This process is time-consuming, causing users to waste considerable time trying to access hot water at the desired temperature again, thus reducing the user experience. Utility Model Content

[0005] The purpose of this invention is to propose a rapid heating structure for a dual-tank electric water heater, in order to solve the problem that the above-mentioned water heaters require a long time to reheat and restore the hot water in the inner tank after a large amount of hot water has been consumed.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a fast-heating structure for a dual-tank electric water heater, including a first inner tank, a second inner tank, a first inner tank heater, a second inner tank heater, a water outlet pipe, and a water inlet pipe. The bottom of the first inner tank is connected to the top of the second inner tank. The water outlet end of the water outlet pipe is located on the bottom outer wall of the second inner tank heater, and the water inlet end of the water outlet pipe passes through the second inner tank and extends into the first inner tank. The water inlet end of the water inlet pipe is located on the bottom outer wall of the second inner tank, and the water outlet end of the water inlet pipe extends into the second inner tank.

[0008] The first inner tank heater includes a 3D heating tube, an upper tank heating tube, and a first flange seat. The outer side of the first flange seat is provided with a plurality of first terminals. The two ends of the upper tank heating tube and the two ends of the 3D heating tube are respectively fixed to the inner side of the first flange seat and electrically connected to the corresponding first terminals. The upper tank heating tube is located below the 3D heating tube.

[0009] The second inner tank heater includes a lower tank heating tube and a second flange seat. The outer side of the second flange seat is provided with several second terminals. The two ends of the lower tank heating tube are fixed to the inner side of the second flange seat and electrically connected to the corresponding second terminals.

[0010] The first inner liner has a first mounting port on one side, and the first flange seat is detachably connected to the first mounting port, so that the upper heating tube and the 3D heating tube extend into the first inner liner; the second inner liner has a second mounting port on one side, and the second flange seat is detachably connected to the second mounting port, so that the lower heating tube extends into the second inner liner.

[0011] In the rapid heating structure of the dual-tank electric water heater, the 3D heating element includes an integrally formed first heating section, a 3D heating section, and a second heating section.

[0012] The first heating segment and the second heating segment are arranged side by side. Each heating segment includes a first connecting segment, a second connecting segment, and a third connecting segment. The first connecting segment and the third connecting segment are staggered and connected by the second connecting segment. The first connecting segment is perpendicular to the first flange seat. The second connecting segment is inclined downward.

[0013] The 3D heating segment includes a first S-shaped tube, a first U-shaped connecting tube, and a second S-shaped tube. One end of the first S-shaped tube is connected to the first heating segment, the other end of the first S-shaped tube is connected to one end of the first U-shaped connecting tube, the other end of the first U-shaped connecting tube is connected to one end of the second S-shaped tube, and the other end of the second S-shaped tube is connected to the second heating segment.

[0014] In the rapid heating structure of the dual-tank electric water heater, both the first S-shaped pipe and the second S-shaped pipe include an integrally formed first straight pipe, first bent pipe, second straight pipe, second bent pipe and third straight pipe; the first straight pipe, first bent pipe, second straight pipe, second bent pipe and third straight pipe are connected in sequence to form an S-shape;

[0015] The first bend and the second bend have the same radius of curvature, which is 7.5 to 12.5 mm.

[0016] In the rapid heating structure of the dual-tank electric water heater, the first inner tank heater further includes a temperature sensing tube, which is fixed to the inside of the first flange seat and located between the first heating section and the second heating section.

[0017] In the rapid heating structure of the dual-tank electric water heater, the upper tank heating tube includes an integrally formed first heating section, a bent heating section, and a second heating section.

[0018] The first heating section and the second heating section are arranged side by side, one end of the curved heating section is connected to the first heating section, and the other end of the curved heating section is connected to the second heating section;

[0019] The first heating section and the second heating section each include a fourth connecting section, a fifth connecting section and a sixth connecting section. The fourth connecting section and the sixth connecting section are offset from each other and are connected by the fifth connecting section. The fourth connecting section is perpendicular to the first flange seat. The fifth connecting section is inclined downward.

[0020] In the rapid heating structure of the dual-tank electric water heater, the curved heating section includes a third S-shaped tube, a second U-shaped connecting tube, and a fourth S-shaped tube. One end of the third S-shaped tube is connected to the first heating section, the other end of the third S-shaped tube is connected to one end of the second U-shaped connecting tube, the other end of the second U-shaped connecting tube is connected to one end of the fourth S-shaped tube, and the other end of the fourth S-shaped tube is connected to the second heating section.

[0021] In the rapid heating structure of the dual-tank electric water heater, the curved heating section includes an integrally formed first U-shaped reversing pipe, a first horizontal pipe, a first curved pipe, a third U-shaped connecting pipe, a second curved pipe, a second horizontal pipe, and a second U-shaped reversing pipe; one end of the first U-shaped reversing pipe is connected to the first heating section, the other end of the first U-shaped reversing pipe is connected to one end of the first horizontal pipe, the other end of the first horizontal pipe is connected to one end of the first curved pipe, the other end of the first curved pipe is connected to one end of the third U-shaped connecting pipe, the other end of the third U-shaped connecting pipe is connected to one end of the second curved pipe, the other end of the second curved pipe is connected to one end of the second horizontal pipe, the other end of the second horizontal pipe is connected to one end of the second U-shaped reversing pipe, and the other end of the second U-shaped reversing pipe is connected to the second heating section; the first curved pipe and the second curved pipe are curved upwards.

[0022] In the rapid heating structure of the dual-tank electric water heater, the water outlet pipe is centrally located at the bottom of the second inner tank heater, and the water inlet pipe is located near the end of the second inner tank heater close to the second mounting port.

[0023] The rapid heating structure of the dual-tank electric water heater also includes a magnesium rod. The fixed end of the magnesium rod is located on the bottom outer wall of the second inner tank heater, and the other end of the magnesium rod is inserted into the second inner tank.

[0024] In the rapid heating structure of the dual-tank electric water heater, the first inner tank heater is tilted and fixed to the first mounting port, and the second inner tank heater is tilted and fixed to the second mounting port. The tilt angles of the first inner tank heater and the second inner tank heater are the same, and the tilt angle is 40-60°.

[0025] One of the technical solutions of this utility model can have the following beneficial effects:

[0026] The dual-tank water heater's rapid heating structure heats both the first and second inner tanks via a first inner tank heater. This allows the water heater to obtain hot water at the set temperature more quickly, shortening the heating time. Furthermore, the first inner tank heater includes a 3D heating element and an upper tank heating element. The 3D heating element heats the upper layer of water in the first inner tank, while the upper tank heating element heats the lower layer. This ensures that during heat convection, the upper, lower, and second inner tanks of the dual-tank water heater all have heating sources, resulting in faster and more stable heating. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal structure of one embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of one embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the first inner tank heater in one embodiment of this utility model;

[0030] Figure 4 yes Figure 3 A schematic diagram of the structure on the other side of the embodiment;

[0031] Figure 5 This is a schematic diagram of the internal structure of one embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the first inner tank heater in one embodiment of this utility model;

[0033] Figure 7 yes Figure 6 A schematic diagram of the structure on the other side of the embodiment;

[0034] In the attached diagram: 1. First inner tank; 2. Second inner tank; 3. First inner tank heater; 4. Second inner tank heater; 5. Water outlet pipe; 6. Water inlet pipe; 7. Magnesium rod.

[0035] 3D heating element 31, upper tank heating element 32, first flange seat 33; first terminal block 34; temperature probe 35; lower tank heating element 41, second flange seat 42; second terminal block 43;

[0036] First straight pipe 301, first bend pipe 302, second straight pipe 303, second bend pipe 304, third straight pipe 305; fourth connecting section 306, fifth connecting section 307, sixth connecting section 308; first heating section 311, 3D heating section 312, second heating section 313; first heating section 321, bending heating section 322, second heating section 323;

[0037] First U-shaped reversing pipe 3001, first horizontal pipe 3002, first bent pipe 3003, third U-shaped connecting pipe 3004, second bent pipe 3005, second horizontal pipe 3006, second U-shaped reversing pipe 3007; first connecting section 3111, second connecting section 3112, third connecting section 3113; first S-shaped pipe 3121, first U-shaped connecting pipe 3122, second S-shaped pipe 3123; third S-shaped pipe 3221, second U-shaped connecting pipe 3222, fourth S-shaped pipe 3223. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0040] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Please refer to Figures 1-7 This utility model provides a fast-heating structure for a dual-tank electric water heater, including a first inner tank 1, a second inner tank 2, a first inner tank heater 3, a second inner tank heater 4, a water outlet pipe 5, and a water inlet pipe 6. The bottom of the first inner tank 1 is connected to the top of the second inner tank 2. The water outlet end of the water outlet pipe 5 is located on the bottom outer wall of the second inner tank heater 4, and the water inlet end of the water outlet pipe 5 passes through the second inner tank 2 and extends into the first inner tank 1. The water inlet end of the water inlet pipe 6 is located on the bottom outer wall of the second inner tank 2, and the water outlet end of the water inlet pipe 6 extends into the second inner tank 2.

[0043] The first inner tank heater 3 includes a 3D heating tube 31, an upper tank heating tube 32, and a first flange seat 33. The outer side of the first flange seat 33 is provided with a plurality of first terminals 34. The two ends of the upper tank heating tube 32 and the two ends of the 3D heating tube 31 are respectively fixed to the inner side of the first flange seat 33 and electrically connected to the corresponding first terminals 34. The upper tank heating tube 32 is located below the 3D heating tube 31.

[0044] The second inner tank heater 4 includes a lower tank heating pipe 41 and a second flange seat 42. The outer side of the second flange seat 42 is provided with a plurality of second terminals 43. The two ends of the lower tank heating pipe 41 are fixed to the inner side of the second flange seat 42 and electrically connected to the corresponding second terminals 43.

[0045] The first inner liner 1 has a first mounting port on one side, and the first flange seat 33 is detachably connected to the first mounting port, so that the upper heating tube 32 and the 3D heating tube 31 extend into the first inner liner 1; the second inner liner 2 has a second mounting port on one side, and the second flange seat 42 is detachably connected to the second mounting port, so that the lower heating tube 41 extends into the second inner liner 2.

[0046] The rapid heating structure of the dual-tank electric water heater includes a first inner tank 1, a second inner tank 2, a first inner tank heater 3, and a second inner tank heater 4. The first inner tank 1 is heated by the first inner tank heater 3, and the second inner tank 2 is heated by the second inner tank heater 4. Since the first inner tank 1 is close to the water outlet, the tap water in the first inner tank 1 can be heated quickly by the first inner tank heater 3; moreover, the second inner tank heater 4 simultaneously heats the water in the second inner tank 2, allowing the electric water heater to obtain hot water at the set temperature more quickly and shortening the heating time.

[0047] The first inner tank heater 3 includes a 3D heating tube 31 and an upper tank heating tube 32. The 3D heating tube 31 is used to heat the upper layer of water in the first inner tank 1, while the upper tank heating tube 32 is used to heat the lower layer of water in the first inner tank 1. The second inner tank heater 4 can refer to the existing electric heating tube structure and is used to heat the water in the second inner tank 2.

[0048] With the above structure, the dual-tank electric water heater has heating sources at three locations during the heat convection process: the upper layer of the first inner tank 1, the lower layer of the first inner tank 1, and the lower layer of the second inner tank 2, thus achieving faster and more stable heating.

[0049] The first terminal 34 and the second terminal 43 are electrically connected to the electronic components of the electric water heater, and the operation of the first inner tank heater 3 and the second inner tank heater 4 are controlled by the control module on the electric water heater.

[0050] The inlet end of the water outlet pipe 5 is located in the first inner tank 1, while the outlet end of the water inlet pipe 6 is located in the second inner tank 2. When the electric water heater is replenished with water, cold water enters the second inner tank 2 through the water inlet pipe 6. When the electric water heater is discharging hot water, hot water is discharged from the first inner tank 1 through the water outlet pipe 5.

[0051] When the electric water heater is not in use and the hot water volume is low, the 3D heating element 3 is controlled to heat the water to meet the temperature near the outlet pipe 6, ensuring the temperature when the electric water heater is suddenly used.

[0052] When the water heater has finished heating and the electric water heater is in use, it can slowly heat the water. The second inner tank heater 4 is controlled to heat the water in the second inner tank 2. The water inlet pipe 6 is located in the second inner tank 2, and the newly added hot water in the electric water heater is slowly heated by using the principle that hot water rises and cold water sinks.

[0053] Specifically, the 3D heating tube 31 includes an integrally formed first heating section 311, a 3D heating section 312, and a second heating section 313;

[0054] The first heating segment 311 and the second heating segment 313 are arranged side by side. Both the first heating segment 311 and the second heating segment 313 include a first connecting segment 3111, a second connecting segment 3112 and a third connecting segment 3113. The first connecting segment 3111 and the third connecting segment 3113 are staggered and connected by the second connecting segment 3112. The first connecting segment 3111 is perpendicular to the first flange seat 33. The second connecting segment 3112 is designed to be inclined downward.

[0055] The 3D heating section 312 includes a first S-shaped tube 3121, a first U-shaped connecting tube 3122, and a second S-shaped tube 3123. One end of the first S-shaped tube 3121 is connected to the first heating section 311, the other end of the first S-shaped tube 3121 is connected to one end of the first U-shaped connecting tube 3122, the other end of the first U-shaped connecting tube 3122 is connected to one end of the second S-shaped tube 3123, and the other end of the second S-shaped tube 3123 is connected to the second heating section 313.

[0056] By adopting the above structure, the 3D heating tube 31 is extended without changing the length of the inner tank of the electric water heater through the cooperation of the first connecting section 3111, the second connecting section 3112 and the third connecting section 3113, thereby increasing the heating area of ​​the upper tank heating tube 32 in the water and improving the heating efficiency.

[0057] In addition, the first S-shaped pipe 3121, the first U-shaped connecting pipe 3122, and the second S-shaped pipe 3123 work together to form a three-dimensional heating structure, which increases the heating area and has higher heating efficiency, enabling rapid heating of the water in the upper layer of the first inner tank.

[0058] Specifically, the first S-shaped tube 3121 and the second S-shaped tube 3123 each include an integrally formed first straight tube 301, first bent tube 302, second straight tube 303, second bent tube 304 and third straight tube 305; the first straight tube 301, first bent tube 302, second straight tube 303, second bent tube 304 and third straight tube 305 are connected in sequence to form an S-shape;

[0059] The first bend 302 and the second bend 304 have the same bending radius, which is 7.5 to 12.5 mm.

[0060] The first S-shaped tube 3121 and the second S-shaped tube 3123 have similar shapes. The first bent tube 302, the second straight tube 303, the second bent tube 304 and the third straight tube 305 work together to form an S-shaped tubular structure, which increases the surface area of ​​the 3D heating tube 31, thereby enabling more effective heat exchange with water and shortening the heating time.

[0061] In one specific embodiment of this utility model, the 3D heating tube 31 is made of a mixture of 310S stainless steel and molybdenum. The elongation of this material is relatively low; please refer to [reference needed]. Figure 1 When the bending radius (R-angle) is too small, the 3D heating element 31 is prone to metal fatigue and breakage, resulting in a high defect rate. When the bending radius (R-angle) is too large, the element itself is prone to interference, leading to localized overheating and uneven heating. Therefore, please refer to... Figure 4 The bending radius of the first bend 302 and the second bend 304 is set to 7.5mm.

[0062] Specifically, the first inner tank heater 3 further includes a temperature probe 35, which is fixed to the inner side of the first flange seat 33 and is located between the first heating section 311 and the second heating section 313.

[0063] The 3D heating tube 31 can directly heat the upper layer of water in the first inner tank 1. Because the upper layer of water in the first inner tank 1 has a high temperature and low density, it is not easy to convection with the lower layer of water at the same temperature, and it is easier to be discharged from the outlet pipe 5.

[0064] To prevent the upper layer of water in the first inner tank 1 from overheating and being discharged from the outlet pipe 5, which could cause scalding to the user, a temperature sensing tube 35 is installed between the first heating section 311 and the second heating section 313 of the first inner tank heater 3. This accurately measures the temperature of the upper layer of water in the first inner tank 1, avoiding a large difference between the discharged hot water temperature and the set temperature, thereby improving the user experience and enhancing safety.

[0065] Specifically, the upper heating tube 32 includes an integrally formed first heating section 321, a bent heating section 322, and a second heating section 323;

[0066] The first heating section 321 and the second heating section 323 are arranged side by side. One end of the curved heating section 322 is connected to the first heating section 321, and the other end of the curved heating section 322 is connected to the second heating section 323.

[0067] The first heating section 321 and the second heating section 323 both include a fourth connecting section 306, a fifth connecting section 307 and a sixth connecting section 308. The fourth connecting section 306 and the sixth connecting section 308 are offset from each other and connected by the fifth connecting section 307. The fourth connecting section 306 is perpendicular to the first flange seat 33. The fifth connecting section 307 is inclined downward.

[0068] Similarly, by adopting the above structure, through the cooperation of the fourth connecting section 306, the fifth connecting section 307 and the sixth connecting section 308, the upper tank heating tube 32 can be extended without changing the length of the inner tank of the electric water heater, thereby increasing the heating area of ​​the upper tank heating tube 32 in the water and improving the heating efficiency.

[0069] Specifically, the bending heating section 322 includes a third S-shaped tube 3221, a second U-shaped connecting tube 3222, and a fourth S-shaped tube 3223. One end of the third S-shaped tube 3221 is connected to the first heating section 321, the other end of the third S-shaped tube 3221 is connected to one end of the second U-shaped connecting tube 3222, the other end of the second U-shaped connecting tube 3222 is connected to one end of the fourth S-shaped tube 3223, and the other end of the fourth S-shaped tube 3223 is connected to the second heating section 323.

[0070] The above structure can also increase the surface area of ​​the upper tank heating tube 32 through the third S-shaped tube 3221, the second U-shaped connecting tube 3222 and the fourth S-shaped tube 3223, thereby enabling more effective heat exchange with water and shortening the heating time; moreover, it can avoid uneven water flow heating, ensure uniform water temperature distribution inside the water heater, and prevent local overheating or insufficient heating.

[0071] In one specific embodiment of the present invention, the third S-shaped tube 3221 is located below the first heating section 321, the fourth S-shaped tube 3223 is located below the second heating section 323, and the second U-shaped connecting tube 3222 is located below the third S-shaped tube 3221 and the fourth S-shaped tube 3223.

[0072] Specifically, the bending heating section 322 includes an integrally formed first U-shaped reversing pipe 3001, a first horizontal pipe 3002, a first bending pipe 3003, a third U-shaped connecting pipe 3004, a second bending pipe 3005, a second horizontal pipe 3006, and a second U-shaped reversing pipe 3007; one end of the first U-shaped reversing pipe 3001 is connected to the first heating section 321, the other end of the first U-shaped reversing pipe 3001 is connected to one end of the first horizontal pipe 3002, and the other end of the first horizontal pipe 3002 is connected to one end of the first bending pipe 3003. The other end of the first bent pipe 3003 is connected to one end of the third U-shaped connecting pipe 3004, the other end of the third U-shaped connecting pipe 3004 is connected to one end of the second bent pipe 3005, the other end of the second bent pipe 3005 is connected to one end of the second horizontal pipe 3006, the other end of the second horizontal pipe 3006 is connected to one end of the second U-shaped reversing pipe 3007, and the other end of the second U-shaped reversing pipe 3007 is connected to the second heating section 323; the first bent pipe 3003 and the second bent pipe 3005 are bent upwards.

[0073] The curved heating section 322 is formed by integrally connecting the first U-shaped reversing pipe 3001, the first horizontal pipe 3002, the first curved pipe 3003, the third U-shaped connecting pipe 3004, the second curved pipe 3005, the second horizontal pipe 3006, and the second U-shaped reversing pipe 3007. The first horizontal pipe 3002 and the second horizontal pipe 3006 are bent upwards, causing the third U-shaped connecting pipe 3004 to tilt upwards.

[0074] The above structure can also increase the surface area of ​​the upper tank heating tube 32 through the first U-shaped reversing pipe 3001, the first horizontal pipe 3002, the first bent pipe 3003, the third U-shaped connecting pipe 3004, the second horizontal pipe 3006, and the second U-shaped reversing pipe 3007, thereby enabling more effective heat exchange with water and helping the water to heat up faster; moreover, it can avoid uneven water flow heating, ensure uniform water temperature distribution inside the water heater, and prevent local overheating or insufficient heating.

[0075] In addition, the bending heating section 322 extends the third U-shaped connecting pipe 3004 upward through the first horizontal pipe 3002 and the second horizontal pipe 3006, which can reduce the surface load of the bending heating section 322 and avoid the problem of a large defect rate caused by the material elongation rate of the upper heating pipe 32.

[0076] Optionally, the water outlet pipe 5 is centrally located at the bottom of the second inner tank heater 4, and the water inlet pipe 6 is located near the end of the second inner tank heater 4 close to the second mounting port.

[0077] With the above structure, a certain distance is maintained between the water outlet pipe 5 and the water inlet pipe 6 to avoid the problem that when water enters the water inlet pipe 6, the lower temperature tap water directly impacts the heated water, causing the temperature of the heated water to drop.

[0078] Preferably, it also includes a magnesium rod 7, the fixed end of which is disposed on the bottom outer wall of the second inner tank heater 4, and the other end of which is inserted into the second inner tank 2.

[0079] At high temperatures, minerals such as calcium and magnesium in water easily deposit to form scale, which has poor thermal conductivity. The magnesium rod 7 can inhibit the formation of scale and prevent it from adhering to the first inner tank heater 3 or the second inner tank heater 4, thus affecting the heating effect and preventing the heating power of the first inner tank heater 3 or the second inner tank heater 4 from increasing.

[0080] Specifically, the first inner liner heater 3 is tilted and fixed to the first mounting port, and the second inner liner heater 4 is tilted and fixed to the second mounting port. The tilt angles of the first inner liner heater 3 and the second inner liner heater 4 are the same, and the tilt angle is 40-60°.

[0081] With the above structure, the first inner tank heater 3 and the second inner tank heater 4 are set at an angle to avoid interference between the first inner tank heater 3 or the second inner tank heater 4 and the water inlet pipe 6, which would cause the hot water discharged from the water inlet pipe 6 to be too hot.

[0082] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A rapid heating structure for a dual-tank electric water heater, characterized in that, The device includes a first inner tank, a second inner tank, a first inner tank heater, a second inner tank heater, a water outlet pipe, and a water inlet pipe. The bottom of the first inner tank is connected to the top of the second inner tank. The water outlet end of the water outlet pipe is located on the bottom outer wall of the second inner tank heater, and the water inlet end of the water outlet pipe passes through the second inner tank and extends into the first inner tank. The water inlet end of the water inlet pipe is located on the bottom outer wall of the second inner tank, and the water outlet end of the water inlet pipe extends into the second inner tank. The first inner tank heater includes a 3D heating tube, an upper tank heating tube, and a first flange seat. The outer side of the first flange seat is provided with a plurality of first terminals. The two ends of the upper tank heating tube and the two ends of the 3D heating tube are respectively fixed to the inner side of the first flange seat and electrically connected to the corresponding first terminals. The upper tank heating tube is located below the 3D heating tube. The second inner tank heater includes a lower tank heating tube and a second flange seat. The outer side of the second flange seat is provided with several second terminals. The two ends of the lower tank heating tube are fixed to the inner side of the second flange seat and electrically connected to the corresponding second terminals. The first inner liner has a first mounting port on one side, and the first flange seat is detachably connected to the first mounting port, so that the upper heating tube and the 3D heating tube extend into the first inner liner; the second inner liner has a second mounting port on one side, and the second flange seat is detachably connected to the second mounting port, so that the lower heating tube extends into the second inner liner.

2. The rapid heating structure of a dual-tank electric water heater according to claim 1, characterized in that, The 3D heating tube includes an integrally formed first heating section, a 3D heating section, and a second heating section; The first heating segment and the second heating segment are arranged side by side. Each heating segment includes a first connecting segment, a second connecting segment, and a third connecting segment. The first connecting segment and the third connecting segment are staggered and connected by the second connecting segment. The first connecting segment is perpendicular to the first flange seat. The second connecting segment is inclined downward. The 3D heating segment includes a first S-shaped tube, a first U-shaped connecting tube, and a second S-shaped tube. One end of the first S-shaped tube is connected to the first heating segment, the other end of the first S-shaped tube is connected to one end of the first U-shaped connecting tube, the other end of the first U-shaped connecting tube is connected to one end of the second S-shaped tube, and the other end of the second S-shaped tube is connected to the second heating segment.

3. The rapid heating structure of a dual-tank electric water heater according to claim 2, characterized in that, Both the first S-shaped tube and the second S-shaped tube include an integrally formed first straight tube, first bend, second straight tube, second bend, and third straight tube; the first straight tube, first bend, second straight tube, second bend, and third straight tube are connected in sequence to form an S-shape; The first bend and the second bend have the same radius of curvature, which is 7.5 to 12.5 mm.

4. The rapid heating structure of a dual-tank electric water heater according to claim 2, characterized in that, The first inner tank heater also includes a temperature probe tube, which is fixed to the inside of the first flange seat and is located between the first heating section and the second heating section.

5. The rapid heating structure of a dual-tank electric water heater according to claim 1, characterized in that, The upper heating element includes an integrally formed first heating section, a bent heating section, and a second heating section. The first heating section and the second heating section are arranged side by side, one end of the curved heating section is connected to the first heating section, and the other end of the curved heating section is connected to the second heating section; The first heating section and the second heating section each include a fourth connecting section, a fifth connecting section and a sixth connecting section. The fourth connecting section and the sixth connecting section are offset from each other and are connected by the fifth connecting section. The fourth connecting section is perpendicular to the first flange seat. The fifth connecting section is inclined downward.

6. The rapid heating structure of a dual-tank electric water heater according to claim 5, characterized in that, The bending heating section includes a third S-shaped tube, a second U-shaped connecting tube, and a fourth S-shaped tube. One end of the third S-shaped tube is connected to the first heating section, the other end of the third S-shaped tube is connected to one end of the second U-shaped connecting tube, the other end of the second U-shaped connecting tube is connected to one end of the fourth S-shaped tube, and the other end of the fourth S-shaped tube is connected to the second heating section.

7. The rapid heating structure of a dual-tank electric water heater according to claim 5, characterized in that, The curved heating section includes an integrally formed first U-shaped reversing tube, a first horizontal tube, a first curved tube, a third U-shaped connecting tube, a second curved tube, a second horizontal tube, and a second U-shaped reversing tube; one end of the first U-shaped reversing tube is connected to the first heating section, the other end of the first U-shaped reversing tube is connected to one end of the first horizontal tube, the other end of the first horizontal tube is connected to one end of the first curved tube, the other end of the first curved tube is connected to one end of the third U-shaped connecting tube, the other end of the third U-shaped connecting tube is connected to one end of the second curved tube, the other end of the second curved tube is connected to one end of the second horizontal tube, the other end of the second horizontal tube is connected to one end of the second U-shaped reversing tube, and the other end of the second U-shaped reversing tube is connected to the second heating section; the first curved tube and the second curved tube are curved upwards.

8. The rapid heating structure of a dual-tank electric water heater according to claim 1, characterized in that, The water outlet pipe is centrally located at the bottom of the second inner tank heater, and the water inlet pipe is located near the end of the second inner tank heater close to the second mounting port.

9. The rapid heating structure of a dual-tank electric water heater according to claim 1, characterized in that, It also includes a magnesium rod, the fixed end of which is disposed on the bottom outer wall of the second inner tank heater, and the other end of which is inserted into the second inner tank.

10. The rapid heating structure of a dual-tank electric water heater according to claim 1, characterized in that, The first inner liner heater is tilted and fixed to the first mounting port, and the second inner liner heater is tilted and fixed to the second mounting port. The tilt angles of the first inner liner heater and the second inner liner heater are the same, and the tilt angle is 40-60°.

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