Electric heating device

Abstract

According to the electric heating device disclosed by the utility model, waste heat in a coil pipe at a cast aluminum hot water end part is absorbed and cooled by a water flow channel at a water outlet end and a shower head connected with a water outlet, so that the temperature of a cast aluminum surface at the hot water end of the coil pipe is reduced; and meanwhile, the temperature of the cold water energy storage block is reduced, so that the waste heat cooling effect of the electric heating device is better, the same waste heat cooling effect is achieved, the use amount of the cold water energy storage block is reduced, and the production cost of the cast aluminum electric heating device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating devices, in particular to a cast aluminum electric heating device used in an electric water heater for bathing. Background Art

[0002] In the existing cast aluminum electric heating device, when the water supply is stopped during normal operation, the electric heating tube has a large amount of residual heat. When the electric water heater is turned on again to supply water, the outlet water temperature will rise instantly, thereby reducing the bathing comfort. The cross-cooling of cold water at the water inlet and hot water at the water outlet cannot effectively reduce the residual heat temperature rise of the cast aluminum middle coil of the electric heating device, and will also increase the overall temperature rise of the cast aluminum surface. Therefore, there is a need for an electric heating device application that can reduce residual heat, reduce the overall temperature rise of cast aluminum, and reduce production costs. Utility Model Content

[0003] An electric heating device comprises a metal water pipe, a cold water energy storage pipe, a coil, an electric heating pipe, cast aluminum and a cold water energy storage block; the metal water pipe is wound into a coil, a cavity is provided in the middle, and the electric heating pipe is placed in the cavity; the cold water energy storage pipe is arranged on the front, back or side of the outer side of the coil formed by the metal water pipe; the cold water energy storage pipe is arranged in the cold water energy storage block; the coil and the electric heating pipe are die-casted together by cast aluminum; the cold water energy storage block and the cast aluminum are arranged as one body or as separate bodies; the cold water energy storage block at the hot water end of the coil is 10-35 mm away from the top of the cast aluminum.

[0004] The cold water energy storage block and the cast aluminum are arranged as separate bodies, and the cold water energy storage block is pressed with the cold water energy storage tube to be closely attached to the front side or the back side of the cast aluminum.

[0005] The heat conduction groove on the cold water energy storage block is set to be straight-through, and the curved pipe part at the top of the cold water energy storage pipe is exposed from the cold water energy storage block and is facing upward.

[0006] The heat conduction groove on the cold water energy storage block is set to be straight-through, and the curved pipe part at the top of the cold water energy storage tube is exposed from the cold water energy storage block, facing upward; the cold water energy storage block is set to two heat conduction blocks that can be disassembled and assembled, and the cold water energy storage tube is set between the two heat conduction blocks.

[0007] The cold water energy storage pipes are arranged in the heat conduction grooves on both sides of the cold water energy storage block, and a heat insulation groove is arranged in the middle of the cold water energy storage block.

[0008] The cold water energy storage pipe is designed to be in a curved shape.

[0009] The cast aluminum outer cold water storage block at the cold water end of the coil is empty.

[0010] An electric heating device comprises a metal water pipe, a cold water energy storage pipe, a coil, an electric heating pipe, cast aluminum and a cold water energy storage block; the metal water pipe is wound into a coil with a cavity in the middle, in which the electric heating pipe is placed; the cold water energy storage pipe is arranged on the front, back or side of the outer side of the coil formed by winding the metal water pipe; the cold water energy storage pipe is arranged in a curved shape, and its curved shape is arranged at the hot water end of the coil and the middle of the coil, and is arranged in the cold water energy storage block; the coil and the electric heating pipe are die-casted together by cast aluminum; the cold water energy storage block and the cast aluminum are arranged as a whole; the cold water energy storage block at the cold water end of the coil covers the cold water energy storage pipes at the water inlet end and the water outlet end of the coil, and the cold water energy storage block outside the cast aluminum at the cold water end of the coil is empty.

[0011] The cold water energy storage block at the hot water end of the coil is 10-35mm away from the top of the cast aluminum.

[0012] The first beneficial effect of the utility model is that the residual heat in the 10-35mm coil at the hot water end of the cast aluminum is absorbed and cooled by the water flow channel at the water outlet end and the shower connected to the water outlet. During normal operation of the electric heating device, since the temperature of the cast aluminum surface closer to the hot water end of the coil is higher and the temperature of the cast aluminum surface closer to the cold water end of the coil is lower, the cold water energy storage block at the hot water end of the coil is set 10-35mm away from the top of the cast aluminum, which can reduce the cooling of the cast aluminum at the hot water end of the coil by the water flow of the cold water energy storage pipe, thereby reducing the temperature of the cast aluminum surface at the hot water end of the coil, and also reducing the temperature of the cold water energy storage block, so that the residual heat cooling effect of the electric heating device is better, thereby achieving the same residual heat cooling effect, reducing the amount of cold water energy storage blocks, and reducing the production cost of the cast aluminum electric heating device.

[0013] The second effect of the utility model is: the cold water energy storage tube is set to a curved shape, and the cold water energy storage block on the outer side of the cast aluminum cold water end of the coil is left empty, thereby increasing the proportion of the space volume of the cold water energy storage tube in the cold water energy storage block on the hot water end of the coil and the outer side of the middle part of the coil; and the temperature at the cold water end of the coil is relatively low, so there is no need to enhance cooling, thereby reducing the volume of the cold water energy storage block; since the specific heat of water is much greater than the specific heat of the cold water energy storage block, the same volume can absorb more heat energy, and the cold water energy storage tube is hollow in the middle, and its material cost is lower than the solid cost of the cold water energy storage block, thereby reducing the amount of cold water energy storage blocks used, thereby reducing the production cost of the cast aluminum electric heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figures 1 to 7 It is a group of schematic diagrams of a specific implementation method of the utility model for reducing waste heat of an electric heating device and reducing production costs at the same time.

[0015] Figures 8 to 10 It is a group of schematic diagrams of another specific implementation method of the utility model for reducing waste heat of an electric heating device and reducing production costs at the same time. DETAILED DESCRIPTION

[0016] The technical solution in the embodiment of the present invention will be further described below in conjunction with the accompanying drawings in the present invention:

[0017] During the heating process of the cast aluminum electric heating device in the high-power water-on and water-off intelligent electric water heater, the instantaneous cessation of water inflow will generate high waste heat. The existing cast aluminum electric heating device coil 12 for bathing is usually wound with a metal water pipe 1 with a diameter of 8-10 mm.

[0018] like Figures 1 to 3 As shown, the utility model is a cast aluminum electric heating device, the residual hot water flow in the 10-35mm coil 12 at the hot water end of the cast aluminum 4 is absorbed and cooled by the water flow channel at the water outlet 32 ​​end and the shower connected to the water outlet 32. During normal operation of the electric heating device, since the temperature of the surface of the cast aluminum 4 closer to the hot water end of the coil 12 is higher, and the temperature of the surface of the cast aluminum 4 closer to the cold water end of the coil 12 is lower, the cold water energy storage block 41 at the hot water end of the coil 12 is set at 10-35mm from the top of the cast aluminum 4, which can reduce the cooling of the cast aluminum 4 at the hot water end of the coil 12 by the water flow of the cold water energy storage pipe 11, thereby reducing the temperature of the surface of the cast aluminum 4 at the hot water end of the coil 12, and also reducing the temperature of the cold water energy storage block 41, so that the residual heat cooling effect of the electric heating device is better, thereby achieving the same residual heat cooling effect, reducing the amount of cold water energy storage block 41, and reducing the production cost of the electric heating device.

[0019] In order to facilitate the bending and forming of the cold water energy storage pipe 11, the cold water energy storage pipe 11 and the coil 12 are arranged to be connected separately.

[0020] like Figures 4 to 6 As shown, in order to reduce the mold opening cost of the cast aluminum electric heating device, the cold water energy storage block 41 and the cast aluminum 4 are set as separate bodies, and the cold water energy storage block 41 is pressed with the cold water energy storage tube 11 close to the front or back of the cast aluminum 4. The cold water energy storage block 41 is set as two heat-conducting blocks that can be disassembled and assembled, and the cold water energy storage tube 11 is set between the two heat-conducting blocks.

[0021] In order to better cool down the waste heat, the heat conduction groove 411 on the cold water energy storage block 41 is set to a straight-through shape, and the curved part at the top of the cold water energy storage tube 11 exposes the cold water energy storage block 41, and the cast aluminum electric heating device is installed in an upward direction; because the water in the cold water energy storage tube 11 is flowing during the operation of the electric heating device, the temperature is always kept low. At this time, the cold water energy storage tube 11 exposed at the top of the cold water energy storage block 41 is in linear contact with the surface of the cast aluminum 4 at the hot water end of the coil 12 in the form of a circular tube, or is non-contact in the air, which will not have a significant impact on the cooling of the surface temperature of the cast aluminum 4 at the hot water end of the coil 12; when the electric heating device stops supplying water, the cold water in the cold water energy storage tube 11 exposed at the top of the cold water energy storage block 41 will quickly transfer temperature through the cold water energy storage block 41 to absorb the waste heat of the electric heating tube 2 according to the physical characteristics of heat rise and cold drop.

[0022] like Figure 7 As shown, the cold water energy storage tube 11 is arranged in the heat conduction grooves 411 on both sides of the cold water energy storage block 41, and a heat insulation groove 412 is arranged in the middle of the cold water energy storage block 41. When the cast aluminum electric heating device is working normally, the cold water in the cold water energy storage tube 11 is flowing, which can absorb and take away part of the heat energy of the cold water energy storage block 41, especially the heat energy of the inner heat conduction block. The heat insulation groove 412 reduces the influence of the cast aluminum 4 on the outer heat conduction block 41, reduces the temperature of the cold water energy storage block 41, realizes better absorption of waste heat, and further reduces the production cost of the electric heating device.

[0023] like Figures 8 to 10 As shown, the utility model is a cast aluminum electric heating device, comprising a metal water pipe 1, a cold water energy storage pipe 11, a coil 12, an electric heating pipe 2, cast aluminum 4, and a cold water energy storage block 41; the metal water pipe 1 is wound into a coil 12, a cavity is provided in the middle, and the electric heating pipe 2 is placed in the cavity; the cold water energy storage pipe 11 is arranged on the front, back, or side of the outer side of the coil 12 wound by the metal water pipe 1; the cold water energy storage pipe 11 is set in a curved shape, and its curved The curved shape is provided at the hot water end 123 of the coil and the middle part 124 of the coil, and is provided in the cold water energy storage block 41; the cast aluminum 4 is die-casted to the coil 12 and the electric heating tube 2; the cold water energy storage block 41 is integrated with the cast aluminum 4; the cold water energy storage block 41 of the cold water end 125 of the coil covers the cold water energy storage tube 11 outside the water inlet end 121 and the water outlet end 122 of the coil, and the cold water energy storage block 41 outside the cast aluminum 4 of the cold water end 125 of the coil is empty. The curved shape of the cold water energy storage tube 11 can also be set to a semicircular, circular, multiple circular, or other irregular shapes.

[0024] The utility model sets the cold water energy storage tube 11 in a curved shape, and the cold water energy storage block 41 outside the cast aluminum 4 of the cold water end 125 of the coil is left empty, thereby increasing the proportion of the spatial volume of the cold water energy storage tube 11 in the cold water energy storage block 41 outside the hot water end 123 of the coil and the middle part 124 of the coil; the temperature of the cold water end 125 of the coil itself is relatively low, and there is no need to enhance cooling, thereby reducing the actual volume of the cold water energy storage block 41; since the specific heat of water is much greater than the specific heat of the cold water energy storage block 41, the same volume can absorb more heat energy, and the cold water energy storage tube 11 is hollow in the middle, and its material cost is lower than the solid cost of the cold water energy storage block 41, thereby reducing the amount of cold water energy storage block 41 used, thereby reducing the production cost of the electric heating device.

[0025] In order to further reduce production costs, the cold water energy storage block 41 of the hot water end 123 of the coil is 10-35 mm away from the top of the cast aluminum. In order to facilitate the bending and forming of the cold water energy storage pipe 11, the cold water energy storage pipe 11 and the coil are arranged to be connected separately.

[0026] The above further introduces a cast aluminum electric heating device according to an embodiment of the utility model. Some cases are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the principle of the utility model. For general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An electric heating device, comprising a metal water pipe (1), a cold water energy storage pipe (11), a coil (12), an electric heating pipe (2), cast aluminum (4), and a cold water energy storage block (41); characterized in that: A metal water pipe (1) is wound into a coil (12), with a cavity in the middle, and an electric heating pipe (2) is placed in the cavity; a cold water energy storage pipe (11) is arranged on the front, back, or side of the outer side of the coil (12) wound into the metal water pipe (1); the cold water energy storage pipe (11) is arranged in a cold water energy storage block (41); the cast aluminum (4) is die-casted together with the coil (12) and the electric heating pipe (2); the cold water energy storage block (41) and the cast aluminum (4) are integrated or separated; the cold water energy storage block (41) at the hot water end of the coil (12) is 10-35 mm away from the top of the cast aluminum (4).

2. An electric heating device according to claim 1, characterized in that: The cold water energy storage block (41) and the cast aluminum (4) are arranged as separate bodies, and the cold water energy storage block (41) is pressed with the cold water energy storage pipe (11) to be closely attached to the front side or the back side of the cast aluminum (4).

3. An electric heating device according to claim 2, characterized in that: The heat conduction groove (411) on the cold water energy storage block (41) is designed to be straight-through, and the curved pipe portion at the top of the cold water energy storage pipe (11) is exposed from the cold water energy storage block (41) and is facing upward.

4. An electric heating device according to claim 2, characterized in that: The heat conduction groove (411) on the cold water energy storage block (41) is configured as a straight-through shape, and the curved pipe portion at the top of the cold water energy storage pipe (11) is exposed from the cold water energy storage block (41) and is directed upward; the cold water energy storage block (41) is configured as two heat conduction blocks that can be disassembled and assembled, and the cold water energy storage pipe (11) is disposed between the two heat conduction blocks.

5. An electric heating device according to claim 3 or 4, characterized in that: The cold water energy storage pipe (11) is arranged in the heat conduction grooves (411) on both sides of the cold water energy storage block (41), and a heat insulation groove (412) is arranged in the middle of the cold water energy storage block (41).

6. The electric heating device according to claim 1, characterized in that: The cold water energy storage pipe (11) is configured to be in a curved shape.

7. The electric heating device according to claim 1, characterized in that: The cold water energy storage block (41) outside the cast aluminum (4) at the cold water end of the coil (12) is left empty.

8. An electric heating device, comprising a metal water pipe (1), a cold water energy storage pipe (11), a coil (12), an electric heating pipe (2), cast aluminum (4), and a cold water energy storage block (41); characterized in that: A metal water pipe (1) is wound into a coil (12), with a cavity in the middle, and an electric heating pipe (2) is placed in the cavity; a cold water energy storage pipe (11) is arranged on the front, back, or side of the outer side of the coil (12) wound by the metal water pipe (1); the cold water energy storage pipe (11) is arranged in a curved shape, and its curved shape is arranged at the hot water end (123) of the coil and the middle part (124) of the coil, and is arranged in a cold water energy storage block (41); the cast aluminum (4) is die-casted together with the coil (12) and the electric heating pipe (2); the cold water energy storage block (41) and the cast aluminum (4) are arranged as a whole; the cold water energy storage block (41) of the cold water end (125) of the coil covers the cold water energy storage pipe (11) of the water inlet end (121) and the water outlet end (122) of the coil, and the cold water energy storage block (41) outside the cast aluminum (4) of the cold water end (125) of the coil is vacant.

9. An electric heating device according to claim 8, characterized in that: The cold water energy storage block (41) at the hot water end (123) of the coil is 10-35 mm away from the top of the cast aluminum (4).

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