Electric water heater

Abstract

The present invention discloses an electric water heater, comprising: an outer shell, which is arranged transversely; an inner tank, which is arranged transversely in the outer shell and is used to store water; a ceramic electric heating module, which comprises an outer sleeve and a ceramic heating core, wherein the first end of the outer sleeve is a closed structure, the second end of the outer sleeve is an open structure, and the ceramic heating core is arranged in the outer sleeve; wherein the outer sleeve of the ceramic electric heating module is sealed and extends into the inner tank, the outer sleeve is arranged transversely in the inner tank, the outer sleeve extends upwardly and obliquely toward the inner direction of the inner tank, and a drainage hole is arranged at one end of the outer shell. The present invention smoothly discharges water in the outer shell through the drainage hole on the outer shell, so as to improve the reliability of the electric water heater.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to an electric water heater. Background Art

[0002] At present, water heaters are household appliances commonly used in people's daily lives, and water heaters are divided into electric water heaters and gas water heaters according to different heating sources. Electric water heaters are widely used because of their easy installation. The electric water heater usually includes an inner tank and an electric heater, and the electric heater is arranged in the inner tank to heat the water in the inner tank through the electric heater.

[0003] In the prior art, the use of ceramic heating tube technology in electric water heaters has been gradually promoted. For example, Chinese patent application No. 201210208328.3 discloses a new type of spiral tube forced circulation electric heater, which uses a ceramic heating tube to heat the water in the water tank of the water heater. When the ceramic heating tube is in use, water droplets will be generated in the tube body due to the alternating changes between hot and cold. After long-term use, the water droplets accumulate in the outer shell. The ceramic heating tube in the heated state is easily damaged when it comes into contact with water, which reduces the reliability of the electric water heater.

[0004] In view of this, how to design an electric water heater that is convenient for drainage to improve the reliability of the electric water heater is a technical problem to be solved by the present invention. Summary of the invention

[0005] The invention provides an electric water heater, which can realize smooth discharge of water in a shell through a drainage hole on the shell, so as to improve the use reliability of the electric water heater.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

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

[0008] a housing, the housing being arranged transversely;

[0009] An inner liner, the inner liner is arranged transversely in the outer shell, and the inner liner is used to store water;

[0010] A ceramic electric heating module, comprising an outer sleeve and a ceramic heating core, wherein a first end of the outer sleeve is a closed structure, a second end of the outer sleeve is an open structure, and the ceramic heating core is arranged in the outer sleeve;

[0011] The outer sleeve of the ceramic electric heating module is sealed and extends into the inner tank. The outer sleeve is arranged transversely in the inner tank. The outer sleeve extends upwardly and obliquely toward the interior of the inner tank. A drainage hole is provided at one end of the outer shell.

[0012] Furthermore, a protrusion is provided at one end of the gallbladder body, an internal thread 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.

[0013] Furthermore, the inner liner includes a liner body and two sealing heads, and the sealing heads are arranged at corresponding ends of the liner body; and the protrusion is arranged on one of the sealing heads.

[0014] Furthermore, a connecting seat is welded on the protruding portion, and the connecting seat is provided with the internal threaded hole.

[0015] Furthermore, it also includes: an installation cover plate, on which a first maintenance port is provided; the installation cover plate is arranged on the head having the protrusion, an electrical installation cavity is formed between the installation end cover and the shell end plate, and the outer end of the ceramic heating core passes through the first maintenance port and extends into the electrical installation cavity.

[0016] Furthermore, a water retaining rib is also provided on the installation cover plate, and the water retaining rib blocks the top of the first maintenance opening.

[0017] Furthermore, a water collecting trough is provided on the lower edge of the installation cover plate, and the water collecting trough is provided below the first maintenance port.

[0018] Furthermore, the water collecting trough is arranged above the drainage hole.

[0019] Furthermore, a water leakage detector is also provided on the installation cover, and the water leakage detector is arranged below the first maintenance port.

[0020] Furthermore, the water leakage detector is arranged in the water collection tank.

[0021] Furthermore, a shield is provided on the installation cover plate, and the shield shields the outer end of the ceramic heating core.

[0022] Furthermore, it also includes a foam pad, which is arranged between the installation cover plate and the corresponding head.

[0023] Furthermore, it also includes:

[0024] A temperature sensing module, the temperature sensing module comprising a heat pipe and a temperature controller;

[0025] The sealing head with the raised portion is also provided with a mounting hole, the heat conducting pipe is sealed and inserted into the mounting hole, and the temperature sensing probe of the temperature controller is arranged in the heat conducting pipe 31 and is located inside the inner tank.

[0026] Furthermore, the heat conducting pipe is located above the outer sleeve.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are: by arranging a ceramic electric heating module that is tilted upward 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 the hot water output rate; on the other hand, during use, since the outer sleeve is tilted upward, the condensed water formed in the outer sleeve can flow smoothly along its inner wall under the action of gravity to avoid the condensed water contacting the ceramic heating core, thereby improving the reliability of use; at the same time, the water output by the outer sleeve can be smoothly discharged through the drainage holes arranged on the outer shell, thereby avoiding the formation of water accumulation inside the outer shell and affecting the normal operation of the internal electrical components, thereby improving the reliability of use of the electric water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 This is one of the structural schematic diagrams of the inner liner assembly of the present invention;

[0030] Figure 2 This is the second structural schematic diagram of the inner liner assembly of the present invention;

[0031] Figure 3 for Figure 2 A cross-sectional view of the middle liner assembly;

[0032] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle A area;

[0033] Figure 5 This is one of the structural schematic diagrams of the ceramic electric heating module of the present invention;

[0034] Figure 6 for Figure 5 A cross-sectional view of the ceramic electric heating module;

[0035] Figure 7 This is the second structural schematic diagram of the ceramic electric heating module of the present invention;

[0036] Figure 8 for Figure 7 The structural diagram of the connecting parts;

[0037] Fig. 9 for Figure 7 A cross-sectional view of the ceramic electric heating module;

[0038] Fig.10 for Fig. 9 A partial enlarged schematic diagram of the middle B area;

[0039] Fig.11 The structural diagram of the invented electric water heater;

[0040] Fig.12 A cross-sectional view of the invented electric water heater;

[0041] Fig.13 The assembly diagram of the invention liner, foam pad and installation cover;

[0042] Fig.14 The present invention is a structural schematic diagram of installing a cover plate.

[0043] Reference numerals:

[0044] Liner 1;

[0045] A raised portion 11 and a connecting seat 12;

[0046] Ceramic electric heating module 2;

[0047] Outer sleeve 21, ceramic heating core 22, sealing ring 23, connecting piece 24;

[0048] Outer flange 211, curved surface 212;

[0049] A first connecting hole 2111;

[0050] Positioning notch 220, mounting seat 221, insulating core 222, pull rod 223, positioning block 224;

[0051] Tightening end 2231 and positioning surface 2241;

[0052] The second connecting hole 240, the pressing plate 241, the connecting plate 242, the fixing plate 243, and the folding edge 244;

[0053] Temperature sensing module 3;

[0054] Thermostat 30, heat pipe 31, temperature sensing probe 32;

[0055] Housing 4;

[0056] Drain hole 41;

[0057] Install the cover plate 5;

[0058] A first maintenance port 51, a water retaining rib 52, a water collecting tank 53, a water leakage detector 54, a protective cover 55, and a second maintenance port 56;

[0059] Foam pad 6;

[0060] Water inlet pipe 101 and water outlet pipe 102. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0068] An electric water heater uses electricity as its main energy source. The high-temperature heat generated after power is turned on directly heats the water stored in the electric water heater to prepare hot water.

[0069] An electric water heater usually includes a water tank, an electric heating component, an electronic control device and other components, wherein a water storage cavity is formed in the water tank to store the water to be heated, the electric heating component is inserted into the water storage cavity formed by the water tank, and the electronic control device is used to control the on and off operation of the electric heating component so that the water in the water tank is heated to a set temperature.

[0070] For the water tank of the electric water heater, the water tank generally includes an outer shell and an inner tank, and an insulation layer is formed between the outer shell and the inner tank. Among them, the outer shell is generally made of plastic material to meet the design requirements of beautiful and diverse shapes; the inner tank can be a metal inner tank or a plastic inner tank according to needs.

[0071] In addition, the insulation layer formed between the outer shell and the inner liner, commonly used insulation materials include: asbestos, sponge, foam plastic, polyurethane foam, etc. In conventional technology, in order to obtain a good insulation effect, the insulation layer is usually formed by foaming.

[0072] Among them, for the inner liner using a metal liner, the interior of the liner is prone to corrosion due to the influence of water quality. For this reason, a magnesium rod is also configured on the water tank, and the magnesium rod is inserted into the water storage cavity inside the water tank.

[0073] Since magnesium is the metal with the lowest potential in the electrochemical series and is physiologically non-toxic, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod is directly related to the length of time the inner liner is protected and the size of the protective effect. The larger the magnesium rod, the better the protective effect and the longer the protection time.

[0074] For the electric heating component, electric heating methods such as electric heating wire, magnetic energy or silicon tube heating can be used to heat the water stored in the water storage cavity.

[0075] The electric heating component in the present invention uses a ceramic electric heating module to heat water, which is described below with reference to the accompanying drawings.

[0076] Embodiment 1, as Figure 1-Figure 6 As shown, the present invention provides an inner liner assembly, comprising:

[0077] Inner liner 1, inner liner 1 is used to store water, and inner liner 1 is provided with a mounting opening (not marked);

[0078] A ceramic electric heating module 2, the ceramic electric heating module 2 comprises 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 arranged in the outer sleeve 21;

[0079] The outer sleeve 21 extends into the inner liner 1 through the installation opening, and the outer sleeve 21 is sealed and connected to the installation opening.

[0080] For the transversely arranged inner pot 1, the ceramic electric heating module 2 is also transversely arranged and extends into the inner pot 1 from the mounting opening configured on the end of the inner pot 1. In order to reduce the damage to the ceramic heating core caused by condensation of the air in the outer sleeve 21 due to the alternation of hot and cold air during use, for the ceramic electric heating module 2, the outer sleeve 21 is transversely arranged in the inner pot 1, and extends obliquely upward along the direction from the outside to the inside of the inner pot 1.

[0081] The water to be heated is contained in the inner tank 1 , wherein the inner tank 1 is provided with a water inlet pipe 101 and a water outlet pipe 102 extending into the inner tank 1 , cold water enters the inner tank 1 through the water inlet pipe 101 , and the heated hot water is output from the water outlet pipe 102 .

[0082] In order to heat the water in the inner pot 1, a ceramic electric heating module 2 is provided in the inner pot 1. The ceramic electric heating module 2 uses a ceramic heating core 22 to generate heat, and the outer sleeve 21 is provided on the outside of the ceramic heating core 22 to protect the ceramic heating core 22 through the outer sleeve 21.

[0083] Among them, the outer sleeve 21 is made of heat-conducting materials such as copper and aluminum, so as to protect the ceramic heating core 22 while 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 sleeve 21.

[0084] In order to improve the heating efficiency and reliability, the ceramic electric heating module 2 is arranged in an inclined manner in the transversely arranged inner pot 1. In addition, the ceramic electric heating module 2 extends upward in the inner pot 1, so that the arrangement length of the ceramic electric heating module 2 in the inner pot 1 can be increased, thereby improving the heating efficiency to meet the requirements of the hot water output rate.

[0085] In addition, since the ceramic electric heating module 2 is installed on the inner tank 1 in an inclined upward extending manner, during use, when the moisture-containing air from the outside enters the outer sleeve 21 and is cooled to form condensed water, the condensed water will flow downward along the inner tube wall of the outer sleeve 21 under the action of gravity and finally flow out. In this way, it is possible to effectively reduce the damage to the high-temperature ceramic heating core 22 caused by water droplets formed in the outer sleeve 21 falling on it, thereby improving the reliability of use.

[0086] Meanwhile, the electric water heater using the above inner tank assembly includes a shell 4, which is also arranged horizontally, and the inner tank 1 is located in the shell 4. In order to allow the water flowing out of the outer sleeve 21 or the water generated due to other reasons to be smoothly discharged from the shell 4, a drainage hole 41 is provided on the shell 4, and the water in the shell 4 can be smoothly discharged from the drainage hole 41, so as to improve the reliability of the electric water heater.

[0087] In actual use, the ceramic electric heating module 2 can be used in the inner pot 1 placed horizontally, and the inner pot 1 is arranged horizontally in the outer shell 4 to meet the use requirements of the ceramic electric heating module 2 for heating the horizontally placed inner pot 1, thereby improving the reliability of use.

[0088] In one embodiment, a protrusion 11 is disposed at one end of the inner container 1 , and the mounting opening is disposed on the protrusion 11 .

[0089] Specifically, in order to facilitate the installation of the ceramic electric heating module 2, a protrusion 11 is provided at the end of the inner pot 1, and the protrusion 11 can be formed on the end cap of the inner pot 1 by stamping or the like. Generally, the end cap of the transversely arranged inner pot 1 is an arc surface, and since the protrusion 11 protrudes from the arc-shaped end face of the end cap of the inner pot 1, a relatively flat installation end face can be formed on the protrusion 11. At the same time, the protrusion 11 is opened to form the installation port, so as to facilitate the insertion of the ceramic electric heating module 2 into the installation port so as to be installed and fixed on the protrusion 11 of the inner pot 1.

[0090] In one embodiment, in order to improve the sealing performance of the connection between the outer sleeve 21 and the inner container 1 , a sealing ring 23 is provided between the second end of the outer sleeve 21 and the raised portion 11 .

[0091] Specifically, the sealing ring 23 seals the connection portion formed between the outer sleeve 21 and the inner liner 1, thereby improving the overall sealing performance.

[0092] The second end of the outer sleeve 21 is provided with an outer flange 211, and the sealing ring 23 is sandwiched between the outer flange 211 and the raised portion 11. The sealing ring 23 is sandwiched between the outer flange 211 and the raised portion 11, so that the connection formed between the outer sleeve 21 and the inner liner 1 is sealed by the sealing ring 23.

[0093] In some embodiments, in order to realize that the outer sleeve 21 extends upwardly and obliquely toward the interior of the inner liner 1, at least two structural designs can be adopted to realize it.

[0094] Method 1 is to realize inclined installation of the outer sleeve 21 by designing the installation end surface formed by the protrusion 11 as an inclined surface, that is, the installation end surface is arranged inclined relative to the horizontal center line of the inner liner 1.

[0095] Specifically, when installing the ceramic electric heating module 2, the ceramic electric heating module 2 is installed obliquely by means of the obliquely arranged installation end surface, so that the ceramic electric heating module 2 extends obliquely upward along the center line of the tax stamp of the inner liner 1 into the inner liner 1. As for the installation end surface, during the molding process of the inner liner 1, the installation end surface formed by the raised portion 11 is formed with a certain inclination angle, so that when installing the ceramic electric heating module 2, it is only necessary to install and fix the ceramic electric heating module 2 on the raised portion 11, so that the ceramic electric heating module 2 can be arranged obliquely upward inside the inner liner 1.

[0096] Method 2: Figure 7 As shown, the second end of the outer sleeve 21 is provided with an outer flange 211 , and an angle is formed between the center line of the outer sleeve 21 and the vertical line of the outer flange 211 .

[0097] 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 tilted 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 vertical line of the outer flange 211 to meet the requirement that the outer sleeve 21 extends tilted upward.

[0098] In some embodiments, in order to facilitate the installation of the outer sleeve 21, an external thread (not marked) may be provided on the outer periphery of the second end of the outer sleeve 21, and the installation port is formed with an internal thread (not marked), and the outer sleeve 21 is threadedly connected to the installation port.

[0099] Specifically, when the operator assembles it in the factory, he first puts the sealing ring 23 on the outside of the outer sleeve 21, and then inserts the outer sleeve 21 into the installation port. After the external thread of the outer sleeve 21 contacts the internal thread on the installation port, the outer sleeve 21 is rotated so that the outer sleeve 21 is threadedly connected to the inner liner 1.

[0100] As the outer sleeve 21 is gradually tightened, the sealing ring 23 is squeezed between the outer flange 211 and the raised portion 11 , and finally the ceramic electric heating module 2 is assembled onto the inner pot 1 .

[0101] In a preferred embodiment, in order to improve the connection reliability and strength between the outer sleeve 21 and the inner liner 1, for the internal threaded hole formed on the inner liner 1, a connecting seat 12 can be welded on the protrusion 11, and the connecting seat 12 is provided with an internal threaded hole.

[0102] Specifically, an internal threaded hole is formed on the connecting seat 12, and the connecting seat 12 is fixedly mounted on the raised portion 11 by welding. In this way, a sufficiently long internal threaded hole can be formed on the inner liner 1 through the connecting seat 12 to meet the threaded connection requirements of the outer sleeve 21. At the same time, the connecting seat 12 is fixed to the inner liner 1 by welding, so that there is sufficient connection strength between the connecting seat 12 and the inner liner 1.

[0103] 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, and then the second end of the outer sleeve 21 cooperates with the internal threaded hole through the external thread to realize threaded installation of the outer sleeve 21 on the connecting seat 12. At the same time, the sealing ring 23 is clamped between the outer flange 211 and the connecting seat 12, thereby meeting the requirements of the sealed connection.

[0104] In other embodiments, in order to facilitate the later maintenance of the electrical components, the electric water heater further comprises:

[0105] The mounting cover plate 5 is provided with a first maintenance port 51; the mounting cover plate 5 is arranged on the end cover having the protrusion 11, and an electrical installation cavity is formed between the mounting end cover and the end plate of the outer shell 4, and the outer end of the ceramic heating core 22 passes through the first maintenance port 51 and extends into the electrical installation cavity.

[0106] Specifically, the outer shell 4 and the inner tank 1 are arranged in a horizontal manner. In order to install relevant electric control components and meet the requirements of later maintenance, an installation cover 5 is provided in the outer shell 4. The installation cover 5 is arranged on a head of the inner tank 1, and an electrical installation cavity is formed between the installation cover 5 and the end cover of the outer shell 4. The electrical installation cavity can be used to install relevant electric control components such as the electric control board. At the same time, a first maintenance port 51 is provided on the installation cover 5, and the part of the ceramic electric heating module 2 exposed outside the inner tank 1 can pass through the first maintenance port 51 and extend into the electrical installation cavity; when the ceramic heating core 22 or the electric heating wire in the ceramic electric heating module 2 needs to be repaired later, convenient and quick maintenance operations can be performed through the electrical installation cavity.

[0107] Preferably, since during use by the user, the interior of the appliance installation cavity is prone to condensation or leakage due to a malfunction, water may flow downward and damage the ceramic heating core 22. For this reason, a water retaining rib 52 is also provided on the installation cover 5, and the water retaining rib 52 blocks the top of the first maintenance port 51.

[0108] Specifically, a water retaining rib 52 is arranged above the first maintenance port 51. When water flows downward on the installation cover 5 in the electrical installation cavity, the water retaining rib 52 can block the water flow so that the water flow cannot flow onto the ceramic heating core 22, so that the water retaining rib 52 can provide waterproof protection for the ceramic heating core 22, thereby improving the reliability of use.

[0109] As for the water flowing to the bottom of the installation cover plate 5, a water collecting trough 53 can be further provided at the lower edge of the installation cover plate 5, and the water flowing down can be collected by the water collecting trough 53. Specifically, the water collecting trough 53 is provided below the first maintenance port 51, and the water collecting trough 53 is arranged in the area between the first maintenance port 51 and the lower end of the water retaining rib 52. The water flowing down through the shielding and guidance of the water retaining rib 52, as well as the water flowing out of the outer sleeve, can flow into the water collecting trough 53 for temporary storage. The water temporarily stored in the water collecting trough 53 is heated and evaporated by the heat generated during the operation of the electronic control device in the electrical installation cavity. In this way, the water flowing out of the drainage hole 41 during daily use and affecting the user experience can be reduced.

[0110] When a large amount of water appears in the electrical appliance installation cavity and the water in the water collecting tank 53 overflows, the water overflowing from the water collecting tank 53 will be discharged from the drainage hole 41 below.

[0111] In order to further improve the reliability and safety of use, a water leakage detector 54 is further provided on the installation cover 5 , and the water leakage detector 54 is arranged below the first maintenance port 51 .

[0112] Specifically, when the inner tank 1 leaks due to a fault, water will quickly accumulate at the bottom of the electrical installation cavity. At this time, when the water level at the bottom rises above the water collection tank 53 and below the first maintenance port 51, the water leakage detector 54 will detect the water leakage and automatically cut off the power supply to the electric control components such as the ceramic electric heating module 2 to reduce the leakage. The water leakage detector 54 is arranged in the water collection tank 53, and the detection head of the water leakage detector 54 is higher than the water collection tank 53.

[0113] In other embodiments, a shield 55 is further provided on the mounting cover plate 5 , and the shield 55 shields the outer end of the ceramic heating core 22 .

[0114] Specifically, the outer end of the ceramic heating core 22 can be further shielded and protected by the shield 55 . The shield 55 completely shields the outer end of the ceramic heating core 22 . The shield 55 can prevent water droplets from falling and splashing onto the ceramic heating core 22 .

[0115] In some embodiments, in order to meet the requirement of accurate assembly, the electric heating appliance further includes a foam pad 6, which is arranged between the mounting cover 5 and the corresponding head.

[0116] Specifically, since the installation cover plate 5 needs to be installed and fixed on the end cap of the liner 1 with a curved surface structure, and is affected by the curved surface structure of the end cap, in order to ensure that the installation cover plate 5 can be reliably installed on the liner 1, a foam pad 6 is additionally provided between the installation cover plate 5 and the end cap. The foam pad 6 can be provided with a matching surface according to the curved surface shape of the end cap, so that the installation cover plate 5 is assisted in installation by the foam pad 6 to improve assembly accuracy, which is more conducive to improving assembly efficiency.

[0117] In some embodiments, since the inner tank 1 is no longer provided with a flange for connection, in order to meet the installation requirements of the temperature sensor in the temperature controller, a mounting hole can be provided at one end of the inner tank 1. Correspondingly, the inner tank assembly also includes: a temperature sensing module 3.

[0118] The temperature sensing module 3 includes a heat pipe 31 and a temperature controller 30. The sealing head with the protrusion 11 is also provided with a mounting hole. The heat pipe 31 is transversely arranged at one end of the inner tank 1 and sealed and inserted into the inner tank 1. The temperature sensing probe 32 of the temperature controller 30 is located in the heat pipe 31. A second maintenance port 56 is provided on the cover plate, and the outer end of the heat pipe passes through the second maintenance port 56 and extends into the electrical installation cavity.

[0119] Specifically, since the ceramic electric heating module 2 is installed on the end cover of the inner tank 1 by means of a threaded connection, a mounting hole is opened on the end cover, and the heat pipe 31 is sealed and inserted into the mounting hole. The end of the heat pipe 31 located inside the inner tank 1 adopts a sealed design, and the temperature sensing probe 32 is installed inside the inner tank 1 through the heat pipe 31, and the water temperature in the inner tank 1 is then detected by the temperature sensing probe 32.

[0120] Embodiment 2: There are many ways to specify the structure of the ceramic electric heating module 2. In order to better meet the requirements of convenient assembly and reduced processing difficulty,

[0121] like Figure 7 and Figure 8 As shown, a first connecting hole 2111 is provided on the outer flange 211, and the ceramic electric heating module 2 also includes: a connecting piece 24, a clamping portion is provided at one end of the connecting piece 24, and a second connecting hole 240 is provided at the other end; wherein, the clamping portion abuts against the end of the ceramic heating core 22, and the bolt passes through the first connecting hole 2111 and the second connecting hole 240 and is threadedly connected with a fastening nut.

[0122] Specifically, during the assembly process of the ceramic electric heating module 2, after the ceramic heating core 22 is inserted into the outer sleeve 21 and inserted into place, the ceramic heating core 22 and the outer sleeve 21 are connected and fixed together externally through the connecting piece 24.

[0123] Among them, the connecting piece 24 is pressed on the end of the ceramic heating core 22 exposed on the outer sleeve 21 through its configured pressing part to realize the pressing 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 connecting piece 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.

[0124] The connecting piece 24 is fixed to the outer flange 211 by bolts, so that the outer flange 211 is firmly and reliably connected to the connecting piece 24. The end of the ceramic heating core 22 is squeezed and positioned by the pressing part of the connecting piece 24, so that the ceramic heating core 22 cannot be separated from the outer sleeve 21, thereby achieving the positioning and fixing of the ceramic heating core 22.

[0125] In addition, the ceramic heating core 22 is connected to the outer sleeve 21 by extrusion limiting, and there is no need to set additional holes on the ceramic heating core 22 to meet the requirements of bolt connection, which reduces the processing difficulty of the ceramic heating core 22 and further reduces the manufacturing cost.

[0126] In some embodiments, the connector 24 includes a pressing plate 241 , a connecting plate 242 and a fixing plate 243 . The pressing plate 241 is connected to the fixing plate 243 via the connecting plate 242 . The pressing plate 241 forms the clamping portion. The fixing plate 243 is provided with a second connecting hole 240 .

[0127] Specifically, the connector 24 is composed of a press plate 241, a connecting plate 242 and a fixing plate 243 connected together. The press plate 241, the connecting plate 242 and the fixing plate 243 can be an integral structure, which is processed by bending a metal plate. The connector 24 is a stepped structure as a whole, and the stepped structure connector 24 can better fit the installation requirements of the outer sleeve 21 and the ceramic heating core 22. For example, the connecting plate 242 is arranged perpendicular to the press plate 241 and the fixing plate 243.

[0128] In some other embodiments, a bent edge 244 is provided on the fixing plate 243 , and the bent edge 244 is abutted against the side of the outer flange 211 .

[0129] Specifically, for the fixing plate 243, the second connection hole 240 provided thereon needs to be aligned with the first connection hole 2111 on the outer flange 211 during assembly so that the bolts can be inserted for fastening. By providing the fixing plate 243 with a folded edge 244, the folded edge 244 will be close to the edge of the outer flange 211, so as to facilitate accurate alignment of the first connection hole 2111 with the second connection hole 240. Preferably, two folded edges 244 with a certain angle can be provided on the fixing plate 243, and the two relatively inclined folded edges 244 are clamped on the edge of the outer flange 211 to achieve accurate positioning.

[0130] During actual assembly, a plurality of connectors 24 may be provided as required to meet the requirement of reliable connection between the outer sleeve 21 and the ceramic heating core 22 .

[0131] In other embodiments, a positioning notch 220 is provided on the ceramic heating core 22 , and the pressing portion is located in the positioning notch 220 .

[0132] Specifically, when the connecting member 24 presses the ceramic heating core 22 , the pressing plate 241 on the connecting member 24 can be stuck in the positioning notch 220 to achieve accurate positioning and fixing of the ceramic heating core 22 .

[0133] 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 effect of the folded edge 244, the positions of the connecting member 24 and the outer flange 211 are relatively fixed. At the same time, when the connecting member 24 and the positioning notch 220 on the ceramic heating core 22 are matched, the installation position and installation angle of the ceramic heating core 22 can be accurately positioned.

[0134] Embodiment 3, based on the above embodiments 1 and 2, in order to improve the anti-seismic capability of the ceramic electric heating module 2 during transportation and meet the installation requirements of the ceramic electric heating module 2 installed in the transversely arranged inner tank 1, the following structural improvement design is made for the ceramic electric heating module 2.

[0135] like Fig. 9 As shown, the ceramic heating core 22 includes a mounting seat 221, an insulating core 222, an electric heating wire (not shown) and a pull rod 223. The mounting seat 221 is provided with a first through hole (not marked), the insulating core 222 is provided with a second through hole (not marked), the insulating core 222 is arranged on the mounting seat 221, the pull rod 223 passes through the first through hole and the second through hole and connects the mounting seat 221 and the insulating core 222 together, and the electric heating wire is arranged on the insulating core 222.

[0136] Specifically, the insulating core 222 in the ceramic heating core 22 can be sintered with ceramic material, while the mounting seat 221 can be made of heat-resistant insulating material, for example: ceramic material can also be used. The insulating core 222 and the mounting seat 221 are connected by a pull rod 223, and one end of the pull rod 223 can be provided with a tightening end 2231, and the tightening end 2231 abuts against the insulating core 222, and the other end of the pull rod 223 is threadedly connected to a locking nut, and the locking nut abuts against the outside of the mounting seat 221, so that the insulating core 222 and the mounting seat 221 are fixedly connected together. Then, the mounting seat 221 is connected and fixed to the outer sleeve 21, wherein the mounting seat 221 is connected to the outer sleeve 21 in a manner that a positioning notch 220 is provided on the mounting seat 221.

[0137] On the one hand, the pull rod 223 can realize the connection between the insulating core 222 and the mounting seat 221. On the other hand, the pull rod 223 can play a role in structural reinforcement of the insulating core 222 inside the insulating core 222, thereby effectively improving the structural strength of the insulating core 222 suspended on the mounting seat 221. During transportation, since the insulating core 222 is effectively supported by the pull rod 223 inside, the collision between the insulating core 222 and the outer sleeve 21 caused by vibration can be effectively reduced, thereby improving reliability.

[0138] In a preferred embodiment, Fig.10 and Fig.11 As shown, 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 (not marked), and 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 .

[0139] 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, so that 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, the insulating core 222 can be prevented from being damaged by the tensioning end 2231 during the process of tightening the locking nut, thereby improving assembly reliability.

[0140] In addition, the pull rod 223 may also be provided with threaded sections at both ends, and the pull rod 223 is connected to the positioning block 224 by threaded connection.

[0141] 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 .

[0142] 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 matching with the arc surface 212 , and the positioning surface 2241 abuts against the arc surface 212 .

[0143] Specifically, after the ceramic heating core 22 is assembled, the ceramic heating core 22 can be installed in the outer sleeve 21, and after the ceramic heating core 22 is assembled in place, the positioning surface 2241 on the positioning block 224 will contact the arc surface 212 formed by the free end of the outer sleeve 21.

[0144] Since the arc surface 212 itself has the function of automatic centering, the ceramic heating core 22 can be accurately installed in place. On the one hand, it can ensure that the ceramic heating core 22 and the inner tube wall of the outer sleeve 21 are maintained 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 sleeve 21, which is more conducive to improving the seismic resistance of the ceramic heating core 22.

[0145] As for the arc surface 212 , a hemispherical surface is preferably adopted, and the positioning surface 2241 is a chamfered edge of the positioning block 224 .

[0146] Embodiment 4, the present invention further provides an electric water heater, comprising an outer shell, an inner tank 1 adopting the inner tank assembly mentioned above, and the inner tank 1 is arranged in the outer shell 4.

[0147] Specifically, the electric water heater provided by the present invention adopts the above-mentioned inner tank assembly, which is placed in the outer shell. Then, the water inlet pipe of the inner tank assembly is connected to the external water supply source (tap water pipe), and the heated water in the inner tank assembly is output from the water outlet pipe to the user's water use terminal (shower or faucet).

[0148] Compared with the prior art, the advantages and positive effects of the present invention are: by arranging a ceramic electric heating module that is tilted upward 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 the hot water output rate; on the other hand, during use, since the outer sleeve is tilted upward, the condensed water formed in the outer sleeve can flow smoothly along its inner wall under the action of gravity to avoid the condensed water contacting the ceramic heating core, thereby improving the reliability of use and meeting the requirements of the water heater using a horizontal water tank and an inner tank assembly for heating, thereby increasing the use range of the inner tank assembly.

[0149] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An electric water heater, It is characterized in that include: a housing, the housing being arranged transversely; An inner liner, the inner liner is arranged transversely in the outer shell, and the inner liner is used to store water; A ceramic electric heating module, comprising an outer sleeve and a ceramic heating core, wherein the first end of the outer sleeve is a closed structure, the second end of the outer sleeve is an open structure, and the ceramic heating core is arranged in the outer sleeve; the sealing ring is configured to seal the connection portion formed between the outer sleeve and the inner tank; Among them, the outer sleeve of the ceramic electric heating module is sealed and extended into the inner tank, the outer sleeve is arranged horizontally in the inner tank, the outer sleeve extends upwardly and obliquely toward the inside of the inner tank, and a drainage hole is provided at one end of the outer shell; the outer sleeve is configured so that during use, when the external moisture-containing air enters the outer sleeve and condenses when it is cooled, the condensed water will flow downward along the inner tube wall of the outer sleeve under the action of gravity and finally flow out.

2. The electric water heater according to claim 1, It is characterized in that A protrusion is provided at one end of the inner shell, an internal thread 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.

3. The electric water heater according to claim 2, It is characterized in that The inner liner comprises a liner body and two sealing heads, wherein the sealing heads are arranged at corresponding ends of the inner liner; and the protrusion is arranged on one of the sealing heads.

4. The electric water heater according to claim 3, It is characterized in that A connecting seat is also welded on the protruding portion, and the connecting seat is provided with the internal threaded hole.

5. The electric water heater according to claim 3, It is characterized in that Also includes: An installation cover plate, wherein the installation cover plate is provided with a first maintenance port; The installation cover is arranged on the end cover having the protrusion, and an electrical installation cavity is formed between the installation cover and the shell end plate. The outer end of the ceramic heating core passes through the first maintenance port and extends into the electrical installation cavity.

6. The electric water heater according to claim 5, It is characterized in that The installation cover plate is also provided with a water retaining rib, and the water retaining rib blocks the top of the first maintenance opening.

7. The electric water heater according to claim 6, It is characterized in that A water collecting trough is also provided on the lower edge of the installation cover plate, and the water collecting trough is arranged below the first maintenance port.

8. The electric water heater according to claim 7, It is characterized in that The water collection tank is arranged above the drainage hole.

9. The electric water heater according to claim 7, It is characterized in that The installation cover is also provided with a water leakage detector, and the water leakage detector is arranged below the first maintenance port.

10. The electric water heater according to claim 9, It is characterized in that The water leakage detector is arranged in the water collection tank.

11. The electric water heater according to claim 5, It is characterized in that The installation cover plate is also provided with a shield, which shields the outer end of the ceramic heating core.

12. The electric water heater according to claim 5, It is characterized in that It also includes a foam pad, which is arranged between the installation cover plate and the corresponding head.

13. The electric water heater according to claim 5, It is characterized in that Also includes: A temperature sensing module, the temperature sensing module comprising a heat pipe and a temperature controller; Among them, the head with the raised portion is also provided with a mounting hole, the heat-conducting pipe is sealably inserted into the mounting hole, and the temperature sensing probe of the temperature controller is arranged in the heat-conducting pipe and located inside the inner tank; the cover plate is provided with a second maintenance port, and the outer end of the heat-conducting pipe passes through the second maintenance port and extends into the electrical installation cavity.

14. The electric water heater according to claim 13, It is characterized in that The heat conducting pipe is located above the outer sleeve.

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