Electric water heater

Abstract

The application discloses an electric water heater, which comprises a shell, a first end cover arranged at one end of the shell, a second end cover arranged at the other end of the shell, a mounting cover plate arranged in the shell, a mounting cavity formed between the mounting cover plate and the first end cover, and an electric appliance cavity formed between the mounting cover plate and the second end cover; an inner container arranged in the mounting cavity; and an electric heating module arranged in the inner container and used for electric heating water; wherein, a first pad and a second pad are arranged in the mounting cavity, the first pad is arranged on the first end cover, the second pad is arranged on the second end cover, and the inner container is located between the first pad and the second pad. The electric water heater has improved foaming quality and product quality.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and in particular relates to an electric water heater. Background Technology

[0002] Water heaters are currently common household appliances, and they are categorized into electric water heaters and gas water heaters based on their heating source. Electric water heaters are widely used due to their ease of installation. An electric water heater typically consists of an outer casing, an inner tank, and an electric heater. The inner tank is housed within the outer casing, and the electric heater is located within the inner tank to heat the water inside. Generally, end caps are also provided at both ends of the outer casing, with one end cap forming an electrical mounting cavity on its inner side. This cavity is used to install components such as the power supply board.

[0003] In existing technologies, the outer shell and inner tank of electric water heaters are generally insulated by foaming. The outer shell is usually made of metal, which has high structural strength. However, the end caps are usually made of plastic. During the foaming process, the end caps are easily deformed by the foaming material, which can lead to overflow, displacement of the end caps, and gaps, thus reducing the quality of the electric water heater.

[0004] Therefore, the technical problem to be solved by this invention is how to design a technology to improve the quality of foaming in order to improve the product quality of electric water heaters. Summary of the Invention

[0005] This invention provides an electric water heater that improves foaming quality to enhance the overall product quality of the water heater.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In one aspect, the present invention provides an electric water heater, comprising:

[0008] The housing has a first end cap at one end and a second end cap at the other end. A mounting cover plate is provided inside the housing. A mounting cavity is formed between the mounting cover plate and the first end cap, and an electrical cavity is formed between the mounting cover plate and the second end cap.

[0009] The inner liner is disposed in the mounting cavity;

[0010] An electric heating module is disposed in the inner tank and is used to heat water by energizing it;

[0011] The installation cavity is provided with a first pad and a second pad, the first pad is disposed on the first end cap, the second pad is disposed on the second end cap, and the inner liner is located between the first pad and the second pad.

[0012] Furthermore, a support protrusion is provided on the surface of the second pad block opposite to the inner liner. The support protrusion has an annular structure, and the end cap of the inner liner abuts against the support protrusion.

[0013] Furthermore, the annular end face of the supporting protrusion is also provided with a first annular groove, and the first annular groove and the inner liner form a first flow-blocking area.

[0014] Furthermore, a second annular groove is provided on the surface of the second end cap opposite to the second pad, and a second flow-blocking area is formed between the second annular groove and the second pad.

[0015] Furthermore, the second annular groove is arranged near the edge of the second end cap.

[0016] Furthermore, the second end cap is provided with multiple rings of the second annular groove.

[0017] Furthermore, the first end cover is provided with an inspection port, and the first end cover is provided with a detachable first decorative cover plate; and / or, the second end cover is provided with a detachable second decorative cover plate.

[0018] Furthermore, the electric heating module includes an outer sleeve and a ceramic heating core, the ceramic heating core being disposed within the outer sleeve; the mounting cover plate has an inwardly recessed portion, a first maintenance port being provided in the recessed portion, a water guide ring being provided around the first maintenance port, the water guide ring extending outward; a protective cover is provided on the water guide ring, the bottom of the protective cover having a drainage hole; the outer end of the ceramic heating core passes through the first maintenance port, and the protective cover covers the outer end of the ceramic heating core.

[0019] Furthermore, the mounting cover is also provided with a water-blocking rib, which covers the area above the first maintenance opening.

[0020] Furthermore, a water collection trough is provided on the lower edge of the mounting cover plate, the water collection trough is located below the first maintenance port, and a leakage detector is installed in the water collection trough.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are as follows: By configuring two pads in the mounting cavity of the outer shell, with the second pad directly abutting against the second end cap, the structural strength of the second end cap is enhanced by the second pad. During the foaming process, the inner tank is sandwiched between the first and second pads, and the two pads are used to position the inner tank, so that the distance between the inner tank and the inner wall of the outer shell is relatively uniform, thereby obtaining a foam layer of uniform thickness. At the same time, when the foaming material flows to the second pad, the second pad is used to reduce the tension generated by the foaming material and directly impact the second end cap, thereby reducing the possibility of deformation of the second end cap and leakage, thus improving the foaming quality and improving the product quality of the electric water heater. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of the electric water heater being invented;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the second end cap;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the second pad block;

[0026] Figure 4 for Figure 1 Exploded view of the inner shell;

[0027] Figure 5 for Figure 1 A partial sectional view of the outer casing;

[0028] Figure 6 for Figure 4 One of the structural schematic diagrams of the middle reinforcing plate;

[0029] Figure 7 for Figure 4 Schematic diagram of the middle reinforcing plate (Part 2);

[0030] Figure 8 for Figure 4 Schematic diagram of the middle liner plate;

[0031] Figure 9 A cross-sectional view of the electric water heater for the invention;

[0032] Figure 10Assembly diagram of the inner liner, the first pad, and the mounting cover;

[0033] Figure 11 One of the structural schematic diagrams for the invention of the electrical box;

[0034] Figure 12 The second schematic diagram of the invention's electrical box;

[0035] Figure 13 A schematic diagram of the structure for installing the cover plate in the invention;

[0036] Figure 14 A schematic diagram of the structure of the protective cover for the invention;

[0037] Figure 15 This is a schematic diagram of the structure of the electric heating module of the present invention;

[0038] Figure 16 for Figure 15 Schematic diagram of the middle connector;

[0039] Figure 17 for Figure 15 Cross-sectional view of the electric heating module;

[0040] Figure 18 for Figure 17 A magnified view of a portion of region B in the middle.

[0041] Figure label:

[0042] Inner liner 1;

[0043] Protrusion 11, connecting seat 12;

[0044] Electric heating module 2;

[0045] Outer tube 21, ceramic heating core 22, sealing ring 23, connector 24;

[0046] Outward flange 211, curved surface 212;

[0047] First connecting hole 2111;

[0048] Positioning notch 220, mounting base 221, insulating core 222, pull rod 223, positioning block 224;

[0049] Tensioning end 2231, positioning surface 2241;

[0050] Second connecting hole 240, pressure plate 241, connecting plate 242, fixing plate 243, folded edge 244;

[0051] Temperature sensing module 3;

[0052] Thermostat 30, heat pipe 31, temperature sensor 32;

[0053] 4. Outer shell;

[0054] Drainage hole 41, mounting hole 42, first slot 43, process hole 44;

[0055] First end cap 401, second end cap 402, second annular groove 403, first decorative cover plate 404, second decorative cover plate 405;

[0056] Install cover plate 5;

[0057] 50. Recessed part; 51. First maintenance port; 52. Water baffle; 53. Water collection trough; 54. Leak detector; 55. Protective cover; 56. Second maintenance port; 57. Water guide ring; 58. Installation groove.

[0058] Drain hole 551, clip hole 552, slot 581, first screw hole 582;

[0059] First pad 61, second pad 62;

[0060] Supporting protrusion 621, first annular groove 622;

[0061] Electrical box 7;

[0062] Power board 70, housing 71, housing cover 72;

[0063] Relay 701, slide 711, plug plate 712, first connecting plate 713, second connecting plate 721;

[0064] Control Panel 8;

[0065] Controller 81;

[0066] Installation mechanism 9;

[0067] Reinforcing plate 91, lining plate 92;

[0068] 911, 912, 913, 914, 915, 916, 917, 921, 922, 923; 924, 915, 916, 917, 921, 922, 923;

[0069] Water inlet pipe 101, water outlet pipe 102. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0071] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0072] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0073] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0077] An electric water heater is a type of water heater that uses electricity as its primary energy source. The high-temperature heat generated after the power is turned on directly heats the water stored in the water heater to produce hot water.

[0078] Electric water heaters typically consist of a water tank, an electric heating element, and an electronic control device. The water tank has a storage cavity to store water to be heated. The electric heating element is inserted into the storage cavity of the water tank. The electronic control device is used to control the on / off operation of the electric heating element so that the water in the tank is heated to the set temperature.

[0079] For the water tank of an electric water heater, the tank generally consists of an outer shell and an inner tank, with an insulation layer between them. The outer shell is usually made of plastic to meet the requirements of aesthetic and diverse designs; the inner tank can be made of metal or plastic, depending on the needs.

[0080] In addition, the insulation layer formed between the outer shell and the inner liner is commonly made of materials such as asbestos, sponge, foam plastic, and polyurethane foam. In conventional technology, foaming is usually used to form the insulation layer in order to achieve good insulation effect.

[0081] For tanks with metal inner liner, corrosion can easily occur inside due to water quality. Therefore, magnesium rods are installed on the water tank and inserted into the water storage cavity inside the tank.

[0082] Magnesium has the lowest electrochemical potential among metals and is physiologically non-toxic. Therefore, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod directly affects the duration and effectiveness of the protection; the larger the magnesium rod, the better the protection and the longer the protection time.

[0083] For electric heating components, electric heating methods such as electric heating wires, magnetic energy, or silicon tube heating can be used to heat the water stored in the water storage chamber.

[0084] The electric heating component in this invention uses an electric heating module to heat water, as described below with reference to the accompanying drawings.

[0085] Example 1, as Figures 1-7 As shown, the present invention provides an electric water heater, comprising:

[0086] The outer casing 4 has a first end cover 401 at one end and a second end cover 402 at the other end. A mounting cover plate 5 is provided inside the outer casing 4. A mounting cavity is formed between the mounting cover plate 5 and the first end cover 401, and an electrical cavity is formed between the mounting cover plate 5 and the second end cover 402.

[0087] Inner liner 1, the inner liner 1 is disposed in the mounting cavity;

[0088] Electric heating module 2 is installed in the inner tank 1 and is used to heat water by energizing it;

[0089] The installation cavity is provided with a first pad 61 and a second pad 62. The first pad 61 is disposed on the first end cap 401, and the second pad 62 is disposed on the second end cap 402. The inner liner 1 is located between the first pad 61 and the second pad 62.

[0090] Specifically, the inner tank 1 is used to store water, which is then filled with water to be heated. The inner tank 1 is equipped with an inlet pipe 101 and an outlet pipe 102 extending into its interior. Cold water enters the inner tank 1 through the inlet pipe 101, while heated hot water exits through the outlet pipe 102. The inner tank 1 has an installation port (unmarked), through which the electric heating module 2 is inserted into the inner tank 1 and used to heat the water.

[0091] During assembly, the inner liner 1 is placed inside the outer shell 4 and is suspended in the outer shell 4 by the first pad 61 and the second pad 62. A foaming space is formed between the outer shell 4, the inner liner 1, the second end cap 402 and the mounting cover plate 5. During the foaming process, the foaming material enters the foaming space for foaming treatment. As for the second end cap 402, since its inner side is protected by the second pad 62, the expansion force generated by the foaming material will be applied to the second pad 62.

[0092] Since the second pad 62 and the second end cap 402 can fit together well and tightly, the force generated by the foaming material will be transmitted to the second end cap 402 through the second pad 62, so as to ensure that the second end cap 402 is evenly stressed, thereby solving the problem of deformation of the second end cap 402 caused by uneven pressure on the second end cap 402 during the flow of the foaming material.

[0093] In some embodiments, a support protrusion 621 is provided on the surface of the second pad 62 opposite to the inner liner 1. The support protrusion 621 has an annular structure, and the end cap of the inner liner 1 abuts against the support protrusion 621.

[0094] Specifically, a support protrusion 621 is provided on the inner surface of the second pad 62. The support protrusion 621 has an overall ring structure, which can better fit against the end cap of the inner liner 1, thus providing more secure and reliable support for the inner liner 1. At the same time, during the foaming process, since the second pad 62 itself is generally made of foam or other materials with heat insulation capabilities, the support protrusion 621 can prevent the foaming material from flowing into the space formed between the support protrusion 621 and the end cap of the inner liner 1, thereby reducing the amount of foaming material used.

[0095] In another embodiment, the annular end face of the supporting protrusion 621 is further provided with a first annular groove 622, which forms a first flow-blocking zone with the inner liner 1. Specifically, by providing a first annular groove 622 on the annular end face of the supporting protrusion 621, the first annular groove 622 effectively blocks the flow of the foaming material, so that the foaming material forms a solidified and sealed structure in the first annular groove 622, thereby reducing the amount of foaming material entering the central area of ​​the second end cap 402, and reducing the occurrence of uneven distribution of foaming material leading to local bulging.

[0096] In a preferred embodiment, a second annular groove 403 is provided on the surface of the second end cap 402 opposite to the second pad 62, forming a second flow-blocking zone between the second annular groove 403 and the second pad 62. Specifically, since some foaming material flows out through the gap between the second pad 62 and the inner wall of the outer shell 4 and flows into the area between the second end cap 402 and the second pad 62, by configuring the second annular groove 403 to form a second flow-blocking zone, the foaming material in the central area of ​​the second end cap 402 can be more effectively blocked, thereby improving the foaming quality. The second annular groove 403 is arranged near the edge of the second end cap 402 to block the foaming material at the outer periphery of the second end cap 402. Furthermore, multiple rings of second annular grooves 403 are provided on the second end cap 402 to form multiple second flow-blocking zones.

[0097] In some embodiments, to optimize the appearance, the first end cover 401 is provided with an inspection port (unmarked), and the first end cover 401 is provided with a removable first decorative cover plate 404; and / or, the second end cover 402 is provided with a removable second decorative cover plate 405.

[0098] Example 2, as Figures 8-14 As shown, the electric water heater provided by the present invention further includes: an electrical box 7, which is disposed in the electrical cavity. The electrical box 7 includes a box body 71 and a box cover 72. The box cover 72 is slidably disposed on the box body 71 and partially covers the opening of the box body 71.

[0099] Specifically, the electrical box 7 houses a power board 70, on which a relay 701 is mounted. The cover 72 protects the relay 701. Thus, during normal use, if the relay 701 catches fire, the cover can protect against sparks generated by the relay 701. As for the cover 72, in use, it only needs to protect the relay 701 on the power board; other components on the power board do not require protection. This effectively reduces the amount of sheet metal used in the cover 72, lowering manufacturing costs.

[0100] In addition, during the maintenance process, the cover 72 does not need to be removed from the box body 71. It is only necessary to push the cover 72 to slide it out to expose the relay 701, so as to facilitate the operator to replace and maintain the relay 701, thereby simplifying the maintenance process and reducing the maintenance difficulty.

[0101] In some embodiments, the two side walls of the box body 71 are provided with sliding grooves 711, and the two sides of the box cover 72 are provided with sliding insertion parts (not marked), which are inserted into the sliding grooves 711 on the corresponding sides and can slide in the sliding grooves 711.

[0102] Specifically, the lid 72 is slidably disposed in the slide groove 711 by means of a sliding insertion part (such as an inner folded edge formed on the lid). The lid 72 uses the sliding insertion part to cooperate with the slide groove 711 to realize the sliding of the lid 72 on the box body 71.

[0103] In some embodiments, in order to form two cavities in the outer casing 4 for respectively installing the inner liner 1 and the electrical box 7, a mounting cover 5 can be provided in the outer casing 4, the mounting cover 5 dividing the interior of the outer casing 4 into the mounting cavity and the electrical cavity; the box 71 is disposed on the mounting cover 5.

[0104] Specifically, the mounting cover 5 is disposed within the outer casing 4, and the inner liner 1 and the electrical box 7 are arranged at intervals. The electrical box 7 is mounted and fixed on the mounting cover 5. For this purpose, the mounting cover 5 is provided with a mounting groove 58, a slot 581 on one side of the mounting groove 58, and a first screw hole 582 on the other side. A plug plate 712 is provided on one side of the box body 71, and a first connecting plate 713 is provided on another side of the box body 71. The first connecting plate has a first fixing hole. The plug plate 712 is inserted into the slot 581, and a screw passes through the first fixing hole and is threaded into the first screw hole.

[0105] Specifically, when fixing the box body 71 onto the mounting cover plate 5, first insert the insert plate 712 into the slot 581, then align the first fixing hole on the first connecting plate with the first screw hole, pass the screw through the first fixing hole and tighten it in the first screw hole, so as to fix the box body 71 onto the mounting cover plate 5.

[0106] In some embodiments, a second screw hole is provided on the other side of the mounting groove 58. The first screw hole and the second screw hole are arranged at intervals. A second connecting plate 721 is provided on the cover 72. A second fixing hole is provided on the second connecting plate 721. The screw passes through the second fixing hole and is threaded into the second screw hole.

[0107] Specifically, under normal use, in order to fix the lid 72 and prevent it from sliding freely, the lid 72 can also be fixed with screws. Preferably, one of the first screw holes can serve as the second screw hole. On the lid 72, the second fixing hole, the first fixing hole and the corresponding first screw hole are aligned, and a screw is passed through the second fixing hole and the first fixing hole in sequence and threaded into the first screw hole.

[0108] In Example 3, for the electric heating module 2, this example adopts a ceramic heating structure, specifically, as follows: Figures 15-18 As shown, the electric heating module 2 includes an outer sleeve 21 and a ceramic heating core 22. The first end of the outer sleeve 21 is a closed structure, and the ceramic heating core 22 is disposed inside the outer sleeve 21. The second end of the outer sleeve 21 is provided with an outward flange 211. A first connecting hole 2111 is provided on the outward flange 211. The electric heating module 2 also includes a connector 24. One end of the connector 24 is provided with a clamping part, and the other end is provided with a second connecting hole 240. The clamping part abuts against the end of the ceramic heating core 22, and a bolt passes through the first connecting hole 2111 and the second connecting hole 240 and is threadedly connected with a fastening nut.

[0109] Specifically, during the assembly process of the electric heating module 2, after the ceramic heating core 22 is inserted into the outer tube 21 and installed in place, the ceramic heating core 22 and the outer tube 21 are connected and fixed together externally by the connector 24.

[0110] The connector 24 presses against the end of the ceramic heating core 22 exposed on the outer sleeve 21 through its clamping part to achieve clamping and fixing of the ceramic heating core 22; further, the first connecting hole 2111 is aligned with the second connecting hole 240, and the connector 24 is fastened to the outer flange 211 on the outer sleeve 21 by bolts to complete the assembly of the electric heating module 2.

[0111] The connector 24 is fixed to the outer flange 211 by bolts, so that the outer flange 211 and the connector 24 are firmly and reliably connected together. The end of the ceramic heating core 22 is pressed and positioned by the clamping part of the connector 24, so that the ceramic heating core 22 cannot be detached from the outer sleeve 21, thereby achieving the positioning and fixing of the ceramic heating core 22.

[0112] In addition, the ceramic heating core 22 is connected to the outer sleeve 21 by extrusion limiting, which eliminates the need to provide additional holes on the ceramic heating core 22 to meet the requirements of bolt connection, thereby reducing the processing difficulty of the ceramic heating core 22 and thus reducing the manufacturing cost.

[0113] In some embodiments, the connector 24 includes a pressure plate 241, a connecting plate 242, and a fixing plate 243. The pressure plate 241 is connected to the fixing plate 243 through the connecting plate 242, and the pressure plate 241 forms the pressing part. The fixing plate 243 is provided with a second connecting hole 240.

[0114] Specifically, the connector 24 consists of a pressure plate 241, a connecting plate 242, and a fixing plate 243 connected together. The pressure plate 241, connecting plate 242, and fixing plate 243 can be a single integrated structure, manufactured by bending metal plates. The connector 24 has a stepped structure, which better conforms to the installation requirements of the outer sleeve 21 and the ceramic heating core 22. For example, the connecting plate 242 is perpendicular to the pressure plate 241 and the fixing plate 243.

[0115] In other embodiments, the fixing plate 243 is provided with a bent flange 244, which abuts against the side of the outward flange 211.

[0116] Specifically, for the fixing plate 243, the second connecting hole 240 on it needs to be aligned with the first connecting hole 2111 on the outer flange 211 during assembly in order to insert bolts for tightening. By providing a folded edge 244 on the fixing plate 243, the folded edge 244 will abut against the edge of the outer flange 211, facilitating accurate alignment of the first connecting hole 2111 and the second connecting hole 240. Preferably, two folded edges 244 at a certain angle can be provided on the fixing plate 243, using the two relatively inclined folded edges 244 to engage with the edge of the outer flange 211 to achieve accurate positioning.

[0117] In actual assembly, the number of connectors 24 can be set as needed to meet the requirement of reliable connection between the outer tube 21 and the ceramic heating core 22.

[0118] In other embodiments, the ceramic heating core 22 is provided with a positioning notch 220, and the clamping part is located in the positioning notch 220.

[0119] Specifically, when the connector 24 is pressing the ceramic heating core 22, the pressure plate 241 on the connector 24 can be locked in the positioning notch 220 to achieve accurate positioning and fixing of the ceramic heating core 22.

[0120] The outer contour of the outer flange 211 can be a polygon, and the first connecting hole 2111 is arranged at the corner of the polygon. In this way, under the positioning action of the folded edge 244, the positions of the connector 24 and the outer flange 211 are relatively fixed. At the same time, when the connector 24 matches the positioning notch 220 on the ceramic heating core 22, the installation position and installation angle of the ceramic heating core 22 can be accurately positioned.

[0121] For the horizontally arranged inner tank 1, the electric heating module 2 also extends into the inner tank 1 through an installation port located at the end of the inner tank 1. To reduce damage to the ceramic heating core caused by condensation due to temperature fluctuations within the outer casing 21 during use, the outer casing 21 is horizontally arranged inside the inner tank 1, extending upwards at an angle from the outside to the inside of the inner tank 1. To ensure smooth drainage of water flowing from the outer casing 21 or water generated for other reasons from the outer casing 4, a drain hole 41 is provided on the outer casing 4. Water in the outer casing 4 can drain smoothly through the drain hole 41, improving the reliability of the electric water heater.

[0122] In actual use, the electric heating module 2 can be used in the horizontally placed inner liner 1, while the inner liner 1 is arranged horizontally in the outer shell 4, so as to meet the heating requirements of the horizontally placed inner liner 1 using the electric heating module 2, thereby improving the reliability of use.

[0123] To heat the water in the inner tank 1, an electric heating module 2 is installed inside the inner tank 1. The electric heating module 2 uses a ceramic heating core 22 to generate heat, and the ceramic heating core 22 is covered by an outer sleeve 21 to protect it. The outer sleeve 21 is made of thermally conductive materials such as copper and aluminum to protect the ceramic heating core 22 while also having good thermal conductivity, thus ensuring that the heat generated by the ceramic heating core 22 is quickly transferred to the water in the inner tank 1 through the outer sleeve 21.

[0124] To improve heating efficiency and reliability, the electric heating module 2 is arranged at an angle within the horizontally arranged inner tank 1. Furthermore, the electric heating module 2 extends upwards at an angle within the inner tank 1, thereby increasing its length within the tank and improving heating efficiency to meet the hot water output requirements.

[0125] Furthermore, since the electric heating module 2 is installed on the inner liner 1 with an upward-sloping extension, during use, when moisture-containing air enters the outer sleeve 21 and condenses upon cooling, the condensate flows downwards along the inner wall of the outer sleeve 21 under gravity and eventually flows out. This effectively reduces the amount of water droplets forming in the outer sleeve 21 that could fall onto the ceramic heating core 22 and damage it, thus improving reliability.

[0126] In other embodiments, the mounting cover 5 is provided with a recessed portion 50 facing inward, and a first maintenance port 51 is provided in the recessed portion 50. A water guide ring 57 is provided around the first maintenance port 51 and extends outward. A protective cover 55 is provided on the water guide ring 57, and a water leakage hole 551 is provided at the bottom of the protective cover 55. The outer sleeve 21 is sealed and extended into the inner liner 1. The outer sleeve 21 is arranged laterally in the inner liner 1 and extends obliquely upward along the direction from the outside to the inside of the inner liner 1. The outer end of the ceramic heating core passes through the first maintenance port 51, and the protective cover 55 covers the outer end of the ceramic heating core.

[0127] Specifically, to facilitate the installation of relevant electrical control components and meet the requirements for future maintenance, a mounting cover 5 is provided on one end of the inner tank 1. The mounting cover 5 and the end cap of the water heater form an electrical installation cavity, through which the electrical control board and other related electrical control devices can be installed. Simultaneously, the mounting cover 5 is provided with a first maintenance port 51, through which the portion of the electric heating module 2 exposed outside the inner tank 1 can pass and extend into the electrical installation cavity. When future maintenance is required on the ceramic heating core 22 or the heating wire in the electric heating module 2, convenient and quick maintenance operations can be performed through the electrical installation cavity.

[0128] During use, condensation will form inside the outer sleeve 21 due to alternating hot and cold temperatures, and will also form in the electrical mounting cavity formed by the mounting cover 5. The condensation formed inside the outer sleeve 21 can flow out from the outer sleeve 21 under the action of gravity and be guided by the water guide ring 57 to the drain hole 551 provided at the bottom of the protective cover 55. Finally, the condensation flowing out of the outer sleeve 21 can be smoothly discharged from the drain hole 551.

[0129] At the same time, even if condensation forms in the electrical installation cavity and leaks, the protective cover 55 shields and protects the outer end of the ceramic heating core 22, thus preventing the condensation from damaging the ceramic heating core 22 and effectively improving its reliability.

[0130] In some embodiments, a slot (not marked) is formed between the water guide ring 57 and the sidewall of the recess 50, and the cover 55 is inserted into the slot 581.

[0131] Specifically, in order to facilitate quick installation of the cover 55, a slot can be formed between the water guide ring 57 and the inner wall of the recess 50. When assembling the cover 55, simply insert the cover 55 into the slot to complete the assembly of the cover 55.

[0132] To improve assembly reliability, the side wall of the recessed part 50 is provided with a claw 501, and the protective cover 55 is provided with a locking hole 552, wherein the claw is locked in the locking hole.

[0133] Specifically, after the cover 55 is inserted into the slot, the claws provided on the inner wall of the recess 50 will lock into the locking holes, and the cover 55 will be locked onto the mounting cover 5 by means of a snap-fit, so as to improve the ease of assembly.

[0134] In addition, the sidewall of the recessed portion 50 is provided with multiple ribs 502, which are arranged around the periphery of the water guide ring 57, and the protective cover 55 is sandwiched between the ribs and the water guide ring 57.

[0135] Specifically, the rib 502 can guide the cover 55 into the slot, and the rib 502 can also abut against the outer surface of the cover 55 to further secure the cover 55.

[0136] In one embodiment, a protrusion 11 is provided at one end of the inner liner 1, and the mounting port is provided on the protrusion 11.

[0137] Specifically, to facilitate the installation of the electric heating module 2, a protrusion 11 is provided at the end of the inner liner 1. The protrusion 11 can be formed on the end cap of the inner liner 1 by stamping or other methods. Generally, the end cap of the transversely arranged inner liner 1 is an arc surface. Since the protrusion 11 protrudes from the arc-shaped end face of the end cap of the inner liner 1, a relatively flat mounting end face can be formed on the protrusion 11. At the same time, the mounting port is formed by opening on the protrusion 11 to facilitate the insertion of the electric heating module 2 into the mounting port for installation and fixation on the protrusion 11 of the inner liner 1.

[0138] In one embodiment, to improve the sealing between the outer sleeve 21 and the inner liner 1, a sealing ring 23 is provided between the second end of the outer sleeve 21 and the protrusion 11.

[0139] Specifically, the sealing ring 23 will seal the connection between the outer sleeve 21 and the inner liner 1, thereby improving the overall sealing performance.

[0140] The outer sleeve 21 has an outward flange 211 at its second end, and a sealing ring 23 is sandwiched between the outward flange 211 and the protrusion 11. The sealing ring 23 is sandwiched between the outward flange 211 and the protrusion 11 to seal the connection between the outer sleeve 21 and the inner liner 1.

[0141] In some embodiments, at least two structural designs can be used to achieve the goal of the outer sleeve 21 extending upwards and tilting toward the inside of the inner liner 1.

[0142] Method 1: The outer sleeve 21 is installed at an angle by designing the mounting end face formed by the protrusion 11 as an inclined surface, that is, the mounting end face is arranged at an angle relative to the horizontal center line of the inner liner 1.

[0143] Specifically, when installing the electric heating module 2, it is installed at an angle using an inclined mounting end face, so that the electric heating module 2 extends into the inner liner 1 at an angle upward along the tax stamp center line. As for the mounting end face, during the forming process of the inner liner 1, the mounting end face of the protrusion 11 is formed at a certain angle. Thus, when installing the electric heating module 2, it is only necessary to install and fix the electric heating module 2 onto the protrusion 11, allowing the electric heating module 2 to be arranged at an angle upward inside the inner liner 1.

[0144] Method 2, such as Figure 15 As shown, the second end of the outer sleeve 21 is provided with an outward flange 211, and an angle is formed between the center line of the outer sleeve 21 and the perpendicular line of the outward flange 211.

[0145] Specifically, for the outer sleeve 21, when it is installed and fixed, the plane formed by the outer flange 211 is used as the installation reference plane, and the center line of the outer sleeve 21 itself will be arranged at an angle relative to the plane formed by the outer flange 211, that is, an acute angle is formed between the center line of the outer sleeve 21 and the perpendicular line of the outer flange 211, so as to meet the requirement that the outer sleeve 21 extends upward at an angle.

[0146] In some embodiments, to facilitate the installation of the outer sleeve 21, an external thread (unmarked) can be provided on the outer periphery of the second end of the outer sleeve 21, and an internal thread (unmarked) can be formed in the mounting port, with the outer sleeve 21 threadedly connected in the mounting port.

[0147] Specifically, when the operator assembles the device in the factory, first, the sealing ring 23 is put on the outside of the outer sleeve 21. Then, the outer sleeve 21 is inserted into the mounting port. After the external thread of the outer sleeve 21 contacts the internal thread on the mounting port, the outer sleeve 21 is rotated so that the outer sleeve 21 is threadedly connected to the inner liner 1.

[0148] As the outer sleeve 21 is gradually tightened, the sealing ring 23 is pressed between the outer flange 211 and the protrusion 11, thus completing the assembly of the electric heating module 2 onto the inner liner 1.

[0149] In a preferred embodiment, in order to improve the reliability and strength of the connection between the outer sleeve 21 and the inner liner 1, a connecting seat 12 can be welded onto the protrusion 11 for the internal threaded hole formed on the inner liner 1, and the connecting seat 12 is provided with an internal threaded hole.

[0150] Specifically, an internal threaded hole is formed on the connector 12, and the connector 12 is fixedly installed on the protrusion 11 by welding. In this way, a sufficiently long internal threaded hole can be formed on the inner liner 1 through the connector 12 to meet the threaded connection requirements of the outer sleeve 21. At the same time, the connector 12 is fixed to the inner liner 1 by welding, so that there is sufficient connection strength between the connector 12 and the inner liner 1.

[0151] When the outer sleeve 21 needs to be assembled, the first end of the outer sleeve 21 extends into the internal threaded hole on the connecting seat 12. Then, the second end of the outer sleeve 21 is threaded onto the connecting seat 12 by engaging the internal threaded hole with the external thread. At the same time, the sealing ring 23 is sandwiched between the outer flange 211 and the connecting seat 12, thereby meeting the requirements of a sealed connection.

[0152] In other embodiments, since the ceramic heating core 22 may be damaged by water flowing downwards due to condensation or leakage caused by malfunctions inside the electrical installation cavity during user use, a water-blocking rib 52 is also provided on the installation cover plate 5 to block the water-blocking rib 52 above the first maintenance port 51.

[0153] Specifically, a water-blocking rib 52 is configured above the first maintenance port 51. When water flows downward from the mounting cover plate 5 inside the electrical installation cavity, the water-blocking rib 52 can block the water flow, preventing it from flowing onto the ceramic heating core 22. This achieves waterproof protection for the ceramic heating core 22, thereby improving its reliability.

[0154] For water flowing to the bottom of the mounting cover 5, a water collection trough 53 can be provided at the lower edge of the mounting cover 5 to collect the flowing water. Specifically, the water collection trough 53 is located below the first maintenance port 51, in the area between the first maintenance port 51 and the lower end of the water-blocking rib 52. Water flowing down through the water-blocking rib 52 and water flowing out of the outer sleeve 21 can flow into the water collection trough 53 for temporary storage. The water temporarily stored in the water collection trough 53 is heated and evaporated by the heat generated during the operation of the electrical control device in the electrical installation cavity. This reduces the amount of water flowing out of the drain hole 41 during daily use, thus reducing the impact on user experience.

[0155] When there is a lot of water in the appliance installation cavity, and the water in the water collection tank 53 overflows, the water overflowing from the water collection tank 53 will be discharged from the drain hole 41 below.

[0156] To further improve reliability and safety, a leak detector 54 is installed on the mounting cover 5, which is located below the first maintenance port 51.

[0157] Specifically, when a malfunction causes water leakage in the inner tank 1, water will quickly accumulate at the bottom of the electrical installation cavity. When the water level at the bottom rises above the water collection tank 53 but below the first maintenance port 51, the leak detector 54 will detect the leakage and automatically cut off power to the electric heating module 2 and other electrical control components to reduce the risk of electrical leakage. The leak detector 54 is located in the water collection tank 53, and its detection head is higher than the water collection tank 53.

[0158] In some other embodiments, a cover 55 is also provided on the mounting cover 5, which covers the outer end of the ceramic heating core 22.

[0159] Specifically, the shield 55 can further protect the outer end of the ceramic heating core 22. The shield 55 completely covers the outer end of the ceramic heating core 22, and the shield 55 can prevent water droplets from falling and splashing onto the ceramic heating core 22.

[0160] In some embodiments, in order to meet the requirements of accurate assembly, the electric heating appliance further includes a first pad 61, which is disposed between the mounting cover 5 and the corresponding end cap.

[0161] Specifically, since the mounting cover 5 needs to be installed and fixed on the curved end cap of the inner liner 1, and due to the influence of the curved end cap structure, a first shim 61 is additionally provided between the mounting cover 5 and the end cap to ensure that the mounting cover 5 can be reliably installed on the inner liner 1. The first shim 61 can be designed with a matching surface according to the curved shape of the end cap. In this way, the mounting cover 5 is assisted in its installation by the first shim 61 to improve assembly accuracy and improve assembly efficiency.

[0162] In some embodiments, since the inner liner 1 is no longer equipped with a flange for connection, in order to meet the installation requirements of the temperature sensing probe in the thermostat, a mounting hole can be provided at one end of the inner liner 1. Correspondingly, the inner liner assembly also includes a temperature sensing module 3.

[0163] The temperature sensing module 3 includes a heat-conducting pipe 31 and a thermostat 30. The end cap with the protrusion 11 is also provided with a mounting hole. The heat-conducting pipe 31 is horizontally arranged at one end of the inner liner 1 and sealed and inserted into the inner liner 1. The temperature sensing probe 32 of the thermostat 30 is located in the heat-conducting pipe 31. The cover plate is provided with a second maintenance port 56. The outer end of the heat-conducting pipe passes through the second maintenance port 56 and extends into the electrical installation cavity.

[0164] Specifically, since the electric heating module 2 is installed on the end cap of the inner tank 1 by means of threaded connection, an installation hole is opened on the end cap, and the heat conduction pipe 31 is sealed and inserted into the installation hole. The end of the heat conduction pipe 31 located inside the inner tank 1 is sealed. The temperature sensing probe 32 is installed inside the inner tank 1 through the heat conduction pipe 31, and then the water temperature inside the inner tank 1 is detected by the temperature sensing probe 32.

[0165] Example 4: Based on Examples 1 and 2 above, in order to improve the shock resistance of the electric heating module 2 during transportation and meet the installation requirements of the horizontally arranged inner liner 1 for installing the electric heating module 2, the following structural improvement design is made to the electric heating module 2.

[0166] like Figures 17-18 As shown, the ceramic heating core 22 includes a mounting base 221, an insulating core 222, an electric heating wire (not shown), and a pull rod 223. The mounting base 221 is provided with a first through hole (not marked), and the insulating core 222 is provided with a second through hole (not marked). The insulating core 222 is mounted on the mounting base 221. The pull rod 223 passes through the first through hole and the second through hole and connects the mounting base 221 and the insulating core 222 together. The electric heating wire is mounted on the insulating core 222.

[0167] Specifically, the insulating core 222 in the ceramic heating core 22 can be sintered from ceramic material, while the mounting base 221 is made of heat-resistant and insulating material, such as ceramic material. The insulating core 222 and the mounting base 221 are connected by a pull rod 223. One end of the pull rod 223 can be equipped with a tension end 2231, which abuts against the insulating core 222. The other end of the pull rod 223 is threaded with a locking nut, which abuts against the outside of the mounting base 221, so that the insulating core 222 and the mounting base 221 are fixedly connected together. Then, the mounting base 221 is connected and fixed to the outer sleeve 21. The mounting base 221 is provided with a positioning notch 220 for connecting the mounting base 221 and the outer sleeve 21.

[0168] The tie rod 223 serves two purposes: firstly, it connects the insulating core 222 to the mounting base 221; secondly, it strengthens the insulating core 222 structurally from within, effectively improving its structural strength as it is suspended on the mounting base 221. During transportation, the tie rod 223 effectively supports the insulating core 222, reducing the risk of collision between the insulating core 222 and the outer sleeve 21 due to vibration, thus enhancing reliability.

[0169] In a preferred embodiment, in order to better protect the insulating core 222, the heating core includes a positioning block 224, which is provided with a third through hole (unmarked). The pull rod 223 passes through the third through hole, the second through hole and the first through hole in sequence, and the tensioning end 2231 abuts against the positioning block 224.

[0170] Specifically, a positioning block 224 is provided at the suspended end of the insulating core 222, and the tensioning end 2231 of the pull rod 223 abuts against the positioning block 224. In this way, the positioning block 224 will bear the pressure generated by the tensioning end 2231. As for the insulating core 222, since the contact area between the positioning block 224 and the insulating core 222 is large, it can prevent the insulating core 222 from being damaged by the tensioning end 2231 during the tightening of the lock nut, thereby improving the assembly reliability.

[0171] Alternatively, threaded sections can be provided at both ends of the pull rod 223, and the pull rod 223 can be connected to the positioning block 224 by means of threaded connection.

[0172] Furthermore, in order to install the ceramic heating core 22 more accurately and reliably, the free end of the outer sleeve 21 can be used to further position and support the ceramic heating core 22.

[0173] Specifically, the inner wall of the closed structure formed by the first end of the outer sleeve 21 is an arc surface 212, and the positioning block 224 is provided with a positioning surface 2241 that cooperates with the arc surface 212, and the positioning surface 2241 abuts against the arc surface 212.

[0174] Specifically, after the ceramic heating core 22 is assembled, it can be inserted into the outer tube 21. After the ceramic heating core 22 is assembled, the positioning surface 2241 on the positioning block 224 will contact the arc surface 212 formed by the free end of the outer tube 21.

[0175] Since the arc surface 212 itself has an automatic centering function, the ceramic heating core 22 can be accurately installed in place. On the one hand, it can ensure that the distance between the ceramic heating core 22 and the inner wall of the outer tube 21 is kept within a precise range. On the other hand, the free end of the ceramic heating core 22 is positioned and supported by the arc surface 212 of the outer tube 21, which is more conducive to improving the shock resistance of the ceramic heating core 22.

[0176] For the curved surface 212, a hemispherical surface is preferred, and the positioning surface 2241 has a chamfer on the edge of the positioning block 224.

[0177] Example 4: Based on Examples 1 to 3 above, optionally, in order to make the overall structure more compact and optimize the appearance, such as... Figures 4-8 As shown, the outer casing 4 is provided with an installation socket 42; the electric water heater also includes a control panel 8 and an installation mechanism 9. The back of the control panel 8 is provided with a controller 81, and the installation mechanism 9 includes a reinforcing plate 91; wherein, the reinforcing plate 91 is provided inside the outer casing 4 and covers the installation socket 42, the control panel 8 is provided on the outer casing 4 and abuts against the surface of the outer casing 4, and the controller 81 is inserted into the installation socket 42.

[0178] Specifically, the outer casing 4 of the water heater is equipped with a control panel 8, which can be installed against the circumferential surface of the outer casing 4. At the same time, the controller 81 on the control panel 8 can pass through the mounting hole 42 on the outer casing 4 and extend into the interior of the outer casing 4 for installation.

[0179] In this way, the controller 81 can be installed using the internal space of the housing 4, resulting in a compact overall design. Meanwhile, the control panel 8 is flush against the outer surface of the housing 4, contributing to a more unified and aesthetically pleasing appearance.

[0180] The reinforcing plate 91 configured in the housing 4 can cover the mounting hole 42, thereby protecting the controller 81. During the foaming process inside the housing 4, it prevents the foam material from flowing into the area around the mounting hole 42, thus preventing leakage and meeting the requirement for the controller 81 to be installed inside the housing 4.

[0181] In some embodiments, the reinforcing plate 91 is provided with a relief groove 911 recessed toward the interior of the housing 4, and the relief groove 911 is arranged opposite to the mounting hole 42.

[0182] Specifically, since the controller 81 needs to extend into the interior of the housing 4, and the reinforcing plate 91 is attached to the inner wall of the housing 4, a recessed clearance groove 911 is formed on the reinforcing plate 91 to reserve space for the installation of the controller 81.

[0183] In other embodiments, since the reinforcing plate 91 is disposed in the outer shell 4 and needs to meet the requirements of foaming, the structural strength of the reinforcing plate 91 needs to be high. For this purpose, a plurality of first reinforcing ribs 912 are provided in the clearance groove 911. Specifically, the first reinforcing ribs 912 can enhance the structural strength of the clearance groove 911 so that the clearance groove 911 has sufficient structural strength to withstand the pressure generated by the foaming material during foaming.

[0184] Similarly, the surface of the reinforcing plate 91 facing away from the mounting hole 42 is provided with a plurality of second reinforcing ribs 913 and / or, the surface of the reinforcing plate 91 facing away from the mounting hole 42 is provided with third reinforcing ribs 914 arranged in a honeycomb structure. Specifically, the second reinforcing ribs 913 can be used to further strengthen the structure on the back side of the reinforcing plate 91. And the third reinforcing ribs 914 arranged in a honeycomb structure are distributed on the back side of the reinforcing plate 91, and their structural strengthening effect is even better.

[0185] In some embodiments, to facilitate the installation of the reinforcing plate 91, the two ends of the reinforcing plate 91 are respectively provided with first claws 915, and the outer shell 4 is provided with a first slot 43, and the first claws 915 are engaged in the first slot 43.

[0186] Specifically, when assembling the housing 4, the reinforcing plate 91 is inserted into the interior of the housing 4 and is fixed to the housing 4 by the first claw 915 engaging with the first slot 43, thus eliminating the need to fix the reinforcing plate 91 with screws inside or outside the housing 4, thereby simplifying the assembly process.

[0187] In a preferred embodiment, in order to reduce leakage of foaming material during the foaming process, a flow-blocking groove 916 is also provided on the reinforcing plate 91, and the flow-blocking groove 916 extends along the edge of the reinforcing plate 91; a flow-blocking area is formed between the inner wall of the outer shell 4 and the flow-blocking groove 916 to block the outflow of foaming material.

[0188] Specifically, the flow-blocking groove 916 is arranged on the front side of the reinforcing plate 91. After the reinforcing plate 91 is installed in the outer shell 4, a flow-blocking area is formed between the flow-blocking groove and the inner wall of the outer shell 4. The flow-blocking area can block the leakage of foam material around the reinforcing plate 91. At the same time, in addition to sealing the foam material, the flow-blocking groove 916 around the reinforcing plate 91 can also reduce the deformation of the reinforcing plate 91.

[0189] In another embodiment, to facilitate the installation of the control panel 8, the mounting mechanism 9 also includes a liner 92; the liner 92 is provided with a through hole 921, the liner 92 is disposed in the housing 4, and the controller 81 is inserted into the through hole 921 and the mounting socket 42 in sequence.

[0190] Specifically, the liner 92 is disposed on the outer surface of the housing 4, and the mounting panel can be snapped onto the liner 92, thereby assisting in the installation of the control panel 8 through the liner 92.

[0191] To improve connection reliability, screws pass through the liner 92 and the outer casing 4 in sequence and are threaded onto the reinforcing plate 91.

[0192] Specifically, the liner 92 is connected to the reinforcing plate 91 inside the outer casing 4 by screws, so that the reinforcing plate 91 serves as a component that bears the installation force of the liner 92, thereby protecting and strengthening the outer casing 4.

[0193] In addition, to facilitate quick on-site assembly by operators, the liner 92 is provided with a second claw 922, the outer shell 4 is provided with a process hole 44, and the reinforcing plate 91 is provided with a second slot 917. The second claw 922 passes through the corresponding process hole 44 and is engaged in the second slot 917.

[0194] Specifically, during on-site assembly, the operator inserts the second claw 922 on the liner 92 into the process hole 44 and locks it into the corresponding second slot 917. In this way, the liner 92 can be pre-installed on the outer casing 4, and then fixed in place with screws.

[0195] Furthermore, the edge of the through hole 921 is provided with a flange structure 923, which is inserted into the mounting hole 42. Specifically, the flange structure 923 is inserted into the mounting hole 42 during installation to enhance the structural connection strength. At the same time, the flange structure 923 can also further enhance the structural strength of the liner 92 to reduce deformation.

[0196] By providing mounting holes on the outer casing, the controller configured on the control panel can be inserted into the interior of the casing through the mounting holes. This allows the control panel to be placed against the surface of the casing, and the controller can be installed using the internal space of the casing. As a result, the overall structure of the water heater is more compact. At the same time, since the control panel is placed against the surface of the casing, the water heater's appearance is integrated, optimizing the aesthetics and improving the user experience.

[0197] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. An electric water heater, characterized in that, include: The housing has a first end cap at one end and a second end cap at the other end. A mounting cover plate is provided inside the housing. A mounting cavity is formed between the mounting cover plate and the first end cap, and an electrical cavity is formed between the mounting cover plate and the second end cap. The inner liner is disposed in the mounting cavity; An electric heating module is disposed in the inner tank and is used to heat water by energizing it; The installation cavity is provided with a first pad and a second pad, the first pad is disposed on the first end cap, the second pad is disposed on the second end cap, and the inner liner is located between the first pad and the second pad. The electric heating module includes an outer tube and a ceramic heating core, the ceramic heating core being disposed within the outer tube. The ceramic heating core includes a mounting base, an insulating core, an electric heating wire, and a pull rod. The mounting base has a first through hole, and the insulating core has a second through hole. The insulating core is mounted on the mounting base. The pull rod passes through the first and second through holes, connecting the mounting base and the insulating core together. The electric heating wire is disposed on the insulating core. The heating core includes a positioning block with a third through hole. The pull rod passes sequentially through the third through hole, the second through hole, and the first through hole. The tensioning end of the pull rod abuts against the positioning block. The inner wall of the closed structure formed by the first end of the outer tube is an arc surface. The positioning block has a positioning surface that mates with the arc surface, and the positioning surface abuts against the arc surface.

2. The electric water heater according to claim 1, characterized in that, The second pad has a support protrusion on its surface opposite to the inner liner. The support protrusion has a ring structure, and the end cap of the inner liner abuts against the support protrusion.

3. The electric water heater according to claim 2, characterized in that, The annular end face of the supporting protrusion is also provided with a first annular groove, and the first annular groove and the inner liner form a first flow-blocking area.

4. The electric water heater according to claim 1, characterized in that, A second annular groove is provided on the surface of the second end cap opposite to the second pad, and a second flow-blocking area is formed between the second annular groove and the second pad.

5. The electric water heater according to claim 4, characterized in that, The second annular groove is arranged near the edge of the second end cap.

6. The electric water heater according to claim 4, characterized in that, The second end cap is provided with multiple rings of the second annular groove.

7. The electric water heater according to claim 1, characterized in that, The first end cover is provided with an inspection port and a detachable first decorative cover plate; and / or, the second end cover is provided with a detachable second decorative cover plate.

8. The electric water heater according to claim 1, characterized in that, The mounting cover plate has an inwardly recessed portion, in which a first maintenance port is provided. A water guide ring is provided around the first maintenance port, extending outward. A protective cover is provided on the water guide ring, and a water leakage hole is provided at the bottom of the protective cover. The outer end of the ceramic heating core passes through the first maintenance port, and the protective cover covers the outer end of the ceramic heating core.

9. The electric water heater according to claim 8, characterized in that, The mounting cover is also provided with a water-blocking rib, which covers the area above the first maintenance opening.

10. The electric water heater according to claim 8, characterized in that, A water collection trough is also provided on the lower edge of the mounting cover plate. The water collection trough is located below the first maintenance port, and a leakage detector is installed in the water collection trough.

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