Inner tank components and electric water heater

Abstract

This invention discloses an inner tank assembly and an electric water heater. The inner tank assembly includes: an inner tank, which is arranged horizontally and used to store water; a ceramic electric heating module, which includes an outer sleeve and a ceramic heating core, the ceramic heating core being disposed within the outer sleeve; a mounting cover, the mounting cover having an inwardly recessed portion, the recessed portion having a first maintenance port, the first maintenance port being surrounded by a water guiding ring extending outward; and a protective cover being provided on the water guiding ring, the bottom of the protective cover having a drainage hole. This invention improves the reliability of the electric water heater.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and particularly relates to an inner tank assembly and an electric water heater. Background Technology

[0002] Water heaters are currently common household appliances, and they are classified 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 inner tank and an electric heater, which is located inside the inner tank to heat the water within it.

[0003] The use of ceramic heating elements in electric water heaters is becoming increasingly common. For example, Chinese Patent Publication No. CN203645846U discloses a ceramic heating element with heat exchange holes in its body, used to heat water in the water tank of a water heater. The outer end of the ceramic heating element protrudes from the inner tank and extends into the electrical mounting cavity of the water heater. During use, condensation forms in the electrical mounting cavity due to alternating hot and cold temperatures. This condensation flows downwards under gravity and onto the ceramic heating element. However, the ceramic heating element is susceptible to damage when in contact with water while heated, leading to a decrease in the reliability of the electric water heater.

[0004] Therefore, how to design an electric water heater that improves the reliability of its use is the technical problem that this invention aims to solve. Summary of the Invention

[0005] This invention provides an inner tank assembly and an electric water heater, thereby improving the reliability of electric water heaters.

[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 inner liner assembly, comprising:

[0008] The inner liner is arranged laterally and is used to store water;

[0009] A ceramic electric heating module, comprising an outer tube and a ceramic heating core, wherein the ceramic heating core is disposed in the outer tube;

[0010] The mounting cover has an inwardly recessed portion, a first maintenance port in the recess, a water guide ring around the first maintenance port extending outward, a protective cover on the water guide ring, and a drainage hole at the bottom of the protective cover.

[0011] The outer sleeve extends into the inner liner in a sealed manner. The outer sleeve is arranged laterally within the inner liner and extends obliquely upwards along the direction from the outside to the inside of the inner liner. 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.

[0012] In one embodiment of this application, a protrusion is provided at one end of the inner liner, and an internal threaded hole is provided on the protrusion. An external thread is provided on the outer periphery of the outer sleeve, and the outer sleeve is threadedly connected to the protrusion. The mounting cover is provided on the protrusion.

[0013] In one embodiment of this application, a foam pad is further provided between the end of the inner liner and the mounting cover plate.

[0014] In one embodiment of this application, a slot is formed between the water guide ring and the sidewall of the recess, and the protective cover is inserted into the slot.

[0015] In one embodiment of this application, the sidewall of the recess is provided with a plurality of ribs, the ribs are arranged around the periphery of the water guide ring, and the protective cover is sandwiched between the ribs and the water guide ring.

[0016] In one embodiment of this application, the sidewall of the recess is provided with a claw, and the protective cover is provided with a locking hole, and the claw is locked in the locking hole.

[0017] In one embodiment of this application, a water collection trough is further provided on the lower edge of the mounting cover plate, and the water collection trough is located below the first maintenance port.

[0018] In one embodiment of this application, a leakage detector is provided in the water collection tank.

[0019] In one embodiment of this application, the mounting cover is further provided with a water-blocking rib, which covers the top of the first maintenance port.

[0020] In another aspect, the present invention provides an electric water heater, comprising:

[0021] The outer casing is arranged laterally;

[0022] The inner liner assembly adopts the aforementioned inner liner assembly and is disposed in the outer shell.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are as follows: By setting an inclined upward ceramic electric heating module in the inner tank, on the one hand, the ceramic electric heating module and the water in the inner tank have a larger heat exchange area to meet the requirements of hot water output rate. On the other hand, during use, because the outer sleeve is inclined upward, the condensate formed in the outer sleeve can flow smoothly out along its inner wall under the action of gravity, so as to avoid the condensate from contacting the ceramic heating core, thereby improving the reliability of use. At the same time, by covering the outer end of the ceramic heating core with a protective cover, the amount of condensate dripping from the water heater shell onto the ceramic heating core can be reduced, thereby further protecting the ceramic heating core. The condensate flowing out of the outer sleeve can be guided along the water guide ring to the drain hole opened at the bottom of the protective cover for discharge, thereby improving the reliability of the electric water heater. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is one of the structural schematic diagrams of the inner liner assembly of the present invention;

[0026] Figure 2 This is a second schematic diagram of the inner liner assembly of the present invention;

[0027] Figure 3 for Figure 2 Cross-sectional view of the inner liner assembly;

[0028] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0029] Figure 5 Assembly diagram for the invention of the inner liner, foam pad, and mounting cover;

[0030] Figure 6 One of the structural schematic diagrams for the invention of the cover plate;

[0031] Figure 7 The second schematic diagram of the structure for installing the cover plate in the invention;

[0032] Figure 8 A schematic diagram of the structure of the protective cover for the invention;

[0033] Figure 9 This is one of the structural schematic diagrams of the ceramic electric heating module of the present invention;

[0034] Figure 10 for Figure 9 Cross-sectional view of the ceramic electric heating module;

[0035] Figure 11 This is a second schematic diagram of the structure of the ceramic electric heating module of the present invention;

[0036] Figure 12 for Figure 11 Schematic diagram of the middle connector;

[0037] Figure 13 for Figure 11 Cross-sectional view of the ceramic electric heating module;

[0038] Figure 14 for Figure 13 A magnified view of a portion of region B in the middle;

[0039] Figure 15 A schematic diagram of the structure of the electric water heater being invented;

[0040] Figure 16 A cross-sectional view of the electric water heater for the invention;

[0041] Figure label:

[0042] Inner liner 1;

[0043] Protrusion 11, connecting seat 12;

[0044] Ceramic 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] Drain hole 41;

[0055] Install cover plate 5;

[0056] 50. Recessed part; 51. First maintenance port; 52. Water baffle; 53. Water collection tank; 54. Leak detector; 55. Protective cover; 56. Second maintenance port; 57. Water guide ring;

[0057] Claw 501, Rib 502, Drain Hole 551, Locking Hole 552

[0058] Foam pad 6;

[0059] Water inlet pipe 101, water outlet pipe 102. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The electric heating component in this invention uses a ceramic electric heating module to heat water, as described below with reference to the accompanying drawings.

[0075] Example 1, as Figures 1-4 As shown, the present invention provides an inner liner assembly, comprising:

[0076] Inner tank 1, used to store water, has an installation port (unmarked);

[0077] Ceramic electric heating module 2, which includes an outer tube 21 and a ceramic heating core 22. The first end of the outer tube 21 is a closed structure, and the ceramic heating core 22 is disposed in the outer tube 21.

[0078] The outer sleeve 21 extends into the inner liner 1 through the mounting port, and the outer sleeve 21 is sealed together with the mounting port.

[0079] For the horizontally arranged inner liner 1, the ceramic electric heating module 2 also extends into the inner liner 1 through the mounting port located at the end of the inner liner 1. In order to reduce the damage to the ceramic heating core caused by condensation of air inside the outer sleeve 21 due to temperature fluctuations during use, the outer sleeve 21 of the ceramic electric heating module 2 is arranged horizontally inside the inner liner 1, and extends upward at an angle along the direction from the outside to the inside of the inner liner 1.

[0080] The inner tank 1 holds water to be heated. The inner tank 1 is provided with an inlet pipe 101 and an outlet pipe 102 extending into the interior of the inner tank 1. Cold water enters the inner tank 1 through the inlet pipe 101, and heated hot water is output from the outlet pipe 102.

[0081] In order to heat the water in the inner tank 1, a ceramic electric heating module 2 is installed in the inner tank 1. The ceramic electric heating module 2 uses a ceramic heating core 22 to generate heat. The ceramic heating core 22 is covered by an outer sleeve 21 to protect the ceramic heating core 22.

[0082] The outer casing 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, thereby 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 casing 21.

[0083] To improve heating efficiency and reliability, the ceramic electric heating module 2 is arranged at an angle within the horizontally arranged inner tank 1. Furthermore, the ceramic electric heating module 2 extends upwards at an angle within the inner tank 1, thereby increasing its length within the inner tank 1 and ultimately improving heating efficiency to meet the hot water output requirements.

[0084] Furthermore, since the ceramic 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.

[0085] like Figures 5-8 As shown, one end of the inner liner 1 is provided with a mounting cover plate 5. The mounting cover plate 5 is provided with a recessed part 50 facing inward. A first maintenance port 51 is provided in the recessed part 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 extends into the inner liner 1. The outer sleeve 21 is arranged laterally in the inner liner 1. Along the direction from the outside to the inside of the inner liner 1, the outer sleeve 21 extends obliquely upward. 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.

[0086] 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 ceramic 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 heating wire in the ceramic electric heating module 2, convenient and quick maintenance operations can be performed through the electrical installation cavity.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] Specifically, after the cover 55 is inserted into the slot, the claws provided on the inner wall of the recess 50 will engage in the locking holes, thereby securing the cover 55 to the mounting plate in a snap-fit ​​manner to improve assembly convenience.

[0093] In addition, the side wall 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.

[0094] 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.

[0095] 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.

[0096] Specifically, to facilitate the installation of the ceramic 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 ceramic electric heating module 2 into the mounting port for installation and fixation on the protrusion 11 of the inner liner 1.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] Specifically, when installing the ceramic electric heating module 2, it is installed at an angle using an inclined mounting end face, so that the ceramic electric heating module 2 extends obliquely upward into the inner liner 1 along the center line of the inner liner 1. 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 ceramic electric heating module 2, it is only necessary to install and fix the ceramic electric heating module 2 onto the protrusion 11, allowing the ceramic electric heating module 2 to be arranged obliquely upward inside the inner liner 1.

[0103] Method 2, such as Figure 11 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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 ceramic electric heating module 2 onto the inner liner 1.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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 ceramic 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.

[0117] 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.

[0118] 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.

[0119] In some embodiments, to meet the requirements of accurate assembly, the electric heating appliance also includes a foam pad 6, which is disposed between the mounting cover 5 and the corresponding end cap.

[0120] Specifically, since the cover plate 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 foam pad 6 is additionally set between the cover plate 5 and the end cap to ensure that the cover plate 5 can be reliably installed on the inner liner 1. The foam pad 6 can be designed with a matching surface according to the curved shape of the end cap. In this way, the foam pad 6 assists in the installation of the cover plate 5 to improve assembly accuracy and improve assembly efficiency.

[0121] 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.

[0122] 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.

[0123] Specifically, since the ceramic 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.

[0124] In Example 2, the specific structural form of the ceramic electric heating module 2 can be varied. However, to better meet the requirements of convenient assembly and reduced processing difficulty,

[0125] like Figure 11 and Figure 12As shown, the outer flange 211 is provided with a first connecting hole 2111. The ceramic 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. The bolt passes through the first connecting hole 2111 and the second connecting hole 240 and is threaded with a fastening nut.

[0126] Specifically, during the assembly process of the ceramic 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.

[0127] The connector 24 presses against the end of the ceramic heating core 22 exposed on the outer sleeve 21 through its configured 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 then the connector 24 is fastened to the outer flange 211 on the outer sleeve 21 by bolts to complete the assembly of the ceramic electric heating module 2.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] In other embodiments, the fixing plate 243 is provided with a bent flange 244, which abuts against the side of the outward flange 211.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] Example 3: Based on Examples 1 and 2 above, in order to improve the shock resistance of the ceramic electric heating module 2 during transportation and meet the installation requirements of the horizontally arranged inner liner 1 for installing the ceramic electric heating module 2, the following structural improvement design is made to the ceramic electric heating module 2.

[0139] like Figure 13 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.

[0140] 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.

[0141] 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.

[0142] In a preferred embodiment, such as Figure 14 and Figure 15 As shown, in order to better protect the insulating core 222, the heating core includes a positioning block 224. The positioning block 224 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] Example 4, as Figure 15 and Figure 16 As shown, the present invention also provides an electric water heater, including an outer shell 4 and an inner tank 1, wherein the inner tank 1 adopts the above-mentioned inner tank assembly and is disposed in the outer shell 4.

[0151] Specifically, the electric water heater provided by the present invention uses the above-mentioned inner tank assembly, which is placed in the outer shell. Then, it is connected to an external water supply source (tap water pipe) through the water inlet pipe of the inner tank assembly, and the heated water in the inner tank assembly is output to the user's water terminal (shower head or faucet) through the water outlet pipe.

[0152] For electric water heaters using the aforementioned inner tank assembly, the outer casing 4 is also arranged horizontally, with the inner tank 1 located within the outer casing 4. To ensure the 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 then be smoothly drained through the drain hole 41, thereby improving the reliability of the electric water heater.

[0153] In actual use, the ceramic 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 ceramic electric heating module 2, thereby improving the reliability of use.

[0154] 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 inner liner assembly, characterized in that, include: The inner liner is arranged laterally and is used to store water; A ceramic electric heating module, comprising an outer tube and a ceramic heating core, wherein the ceramic heating core is disposed in the outer tube; The mounting cover has an inwardly recessed portion, a first maintenance port in the recess, a water guide ring around the first maintenance port extending outward, a protective cover on the water guide ring, and a drainage hole at the bottom of the protective cover. The outer sleeve extends into the inner liner in a sealed manner. The outer sleeve is arranged laterally within the inner liner and extends obliquely upwards along the direction from the outside to the inside of the inner liner. 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. The ceramic heating core includes a mounting base, an insulating core, an electric heating wire, and a pull rod. The mounting base is provided with a first through hole, and the insulating core is provided with a second through hole. The insulating core is disposed on the mounting base. The pull rod passes through the first through hole and the second through hole and connects 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 through the third through hole, the second through hole, and the first through hole in sequence. 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 sleeve is an arc surface. The positioning block is provided with a positioning surface that mates with the arc surface, and the positioning surface abuts against the arc surface.

2. The inner liner assembly according to claim 1, characterized in that, One end of the inner liner is provided with a protrusion, and the protrusion is provided with an internal threaded hole. The outer circumference of the outer sleeve is provided with an external thread, and the outer sleeve is threadedly connected to the protrusion. The mounting cover is provided on the protrusion.

3. The inner liner assembly according to claim 2, characterized in that, A foam pad is also provided between the end of the inner liner and the mounting cover plate.

4. The inner liner assembly according to claim 1, characterized in that, A slot is formed between the water guide ring and the side wall of the recess, and the protective cover is inserted into the slot.

5. The inner liner assembly according to claim 4, characterized in that, The sidewall of the recess is provided with multiple ribs, which are arranged around the periphery of the water guide ring, and the protective cover is sandwiched between the ribs and the water guide ring.

6. The inner liner assembly according to claim 4, characterized in that, The sidewall of the recess is provided with a claw, and the cover is provided with a locking hole, and the claw is locked in the locking hole.

7. The inner liner assembly according to claim 1, characterized in that, A water collection trough is also provided on the lower edge of the mounting cover, and the water collection trough is located below the first maintenance port.

8. The inner liner assembly according to claim 7, characterized in that, A leak detector is installed in the water collection tank.

9. The inner liner assembly according to claim 1, characterized in that, The mounting cover is also provided with a water-blocking rib, which covers the area above the first maintenance opening.

10. An electric water heater, characterized in that, include: The outer casing is arranged laterally; The inner liner assembly is an inner liner assembly as described in any one of claims 1-9, and the inner liner assembly is disposed in the outer shell.

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