Inner container assembly and electric water heater

Abstract

The application discloses an inner container assembly and an electric water heater. The inner container assembly comprises an inner container, a connecting pipe arranged on the inner container, and an inner thread arranged on the connecting pipe. The water pipe module comprises an insulation pipe and a water pipe. One end of the insulation pipe is provided with a first embedding piece in a cylindrical structure. An outer thread is formed on the outer periphery of the first embedding piece. One end of the water pipe is inserted into the insulation pipe. The other end of the water pipe is inserted into the connecting pipe and extends into the inner container. The first embedding piece is threadedly connected in the inner thread. The length of the insulation pipe is shortened to reduce the volume of the electric water heater, thereby improving the space utilization and the user experience of the electric water heater.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to an inner container assembly and an electric water heater. BACKGROUND

[0002] At present, the water heater is a household appliance commonly used in people's daily life, and the water heater is divided into an electric water heater and a gas water heater according to different heating sources. The electric water heater is widely used because of its convenient installation. The electric water heater usually comprises an inner container and an electric heater, and the electric heater is arranged in the inner container to heat water in the inner container through the electric heater.

[0003] For a conventional storage type electric water heater, it usually comprises a water tank, an electric heating component and an electric control board, the water tank comprises an outer shell and an inner container, the inner container is arranged in the outer shell, and a heat preservation layer is formed between the outer shell and the inner container to improve the heat preservation performance of the water tank. The inner container needs to be provided with an inlet and outlet water pipe to meet the requirement of water inlet and outlet, and when the water pipe is installed on the inner container, in order to meet the requirement of insulation arrangement, the water pipe is usually indirectly installed on the inner container through an insulating pipe. An inner thread is arranged on the insulating pipe, and an outer thread is arranged on the connecting pipe of the inner container, so as to realize the connection of the insulating pipe on the inner container. The overall length of the insulating pipe is relatively long due to the requirement of installing the water pipe, which leads to the increase of the overall volume of the electric water heater.

[0004] Therefore, how to design a technology for shortening the length of the insulating pipe to reduce the volume of the electric water heater is a technical problem to be solved by the present application. SUMMARY

[0005] The present application provides an inner container assembly and an electric water heater, which realizes the shortening of the length of the insulating pipe to reduce the volume of the electric water heater, and improves the space utilization rate to improve the user experience of the electric water heater.

[0006] In order to achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] In one aspect, the present application provides an inner container assembly, comprising:

[0008] an inner container, wherein an connecting pipe is arranged on the inner container, and the connecting pipe is provided with an inner thread;

[0009] a water pipe module, wherein the water pipe module comprises an insulating pipe and a water pipe, one end of the insulating pipe is provided with a first embedding piece, the first embedding piece is in a cylindrical structure, an outer periphery of the first embedding piece is formed with an outer thread, and one end of the water pipe is inserted into the insulating pipe;

[0010] wherein the other end of the water pipe is inserted into the connecting pipe and extends into the inner container, and the first embedding piece is threadedly connected in the inner thread.

[0011] In an embodiment of the present application, the first embedding piece is further sleeved with a sealing ring, which is extruded between the connecting pipe and the insulation pipe.

[0012] In an embodiment of the present application, the other end of the insulation pipe is provided with a second embedding piece, which is in a cylindrical structure, and the outer periphery of the second embedding piece is also formed with external threads.

[0013] In an embodiment of the present application, the sidewall of the insulation pipe is provided with a bushing, and the sidewall of the second embedding piece is provided with a threaded hole, which penetrates the sidewall of the second embedding piece and communicates with the bushing.

[0014] In an embodiment of the present application, a sensor is arranged in the bushing, and the sensor is threadedly connected in the threaded hole.

[0015] In an embodiment of the present application, the water pipe is further provided with a sleeve, and the pipe wall of the sleeve is provided with a plurality of through holes.

[0016] In an embodiment of the present application, the sleeve and the water pipe are further filled with functional filter material.

[0017] In an embodiment of the present application, a first annular plug is arranged between the upper end of the sleeve and the water pipe.

[0018] In an embodiment of the present application, the lower end of the sleeve is connected to the insulation pipe, or the lower end of the sleeve is connected to the first embedding piece, or a second annular plug is arranged between the lower end of the sleeve and the water pipe.

[0019] The present application also provides an electric water heater, which comprises a shell and the above-mentioned inner container assembly, the inner container assembly is arranged in the shell, and a heat preservation layer is arranged between the inner container assembly and the shell.

[0020] Compared with the prior art, the present application has the advantages and positive effects that: by arranging internal threads on the connecting pipe of the inner container and external threads on the first embedding piece of the insulation pipe, the insulation pipe is connected to the inner container through the first embedding piece, and the first embedding piece will utilize the length of the connecting pipe itself to meet the length requirement of the threaded connection, thereby eliminating the need to arrange a relatively long connecting pipe outside the inner container to connect the insulation pipe, and at the same time, effectively shortening the length of the insulation pipe itself, realizing the shortening of the length of the insulation pipe to reduce the volume of the electric water heater, thereby improving the space utilization rate and improving the user experience of the electric water heater. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0022] Figure 1 Structure diagram of an embodiment of the inner container assembly of the present application;

[0023] Figure 2 Assembly diagram of the water pipe module and the connecting pipe in an embodiment of the inner container assembly of the present application;

[0024] Figure 3 Sectional view of the water pipe module in an embodiment of the inner container assembly of the present application;

[0025] Figure 4 Structure diagram of another embodiment of the inner container assembly of the present application; Figure 3 Partial enlarged diagram of region I in the structure diagram;

[0026] Figure 5 Structure diagram of another embodiment of the inner container assembly of the present application;

[0027] Figure 6 Sectional view of M-M in the structure diagram; Figure 5 Partial enlarged diagram of region N in the structure diagram;

[0028] Figure 7 Structure diagram of the connecting pipe in another embodiment of the inner container assembly of the present application; Figure 6 Partial enlarged diagram of region N in the structure diagram;

[0029] Figure 8 Structure diagram of the connecting pipe in another embodiment of the inner container assembly of the present application;

[0030] Figure 9 Structure diagram of an embodiment of the water tank for electric water heater of the present application;

[0031] Figure 10 Exploded view of an embodiment of the water tank for electric water heater of the present application;

[0032] Figure 11 Sectional view of an embodiment of the electric water heater of the present application;

[0033] Figure 12 Partial enlarged diagram of region A in the sectional view; Figure 11 Partial enlarged diagram of region B in the sectional view;

[0034] Figure 13 Partial enlarged diagram of region B in the sectional view; Figure 11 Partial enlarged diagram of region B in the sectional view;

[0035] Figure 14 Structure diagram of the front panel in an embodiment of the electric water heater of the present application.

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] Housing 1;

[0038] Rear shell 11, first screw hole 111, mounting table 112, second positioning groove 113, stepped surface 114, blocking rib 115;

[0039] Lining plate 12, first through hole 121, first clamping portion 122, second screw hole 123, first guide sliding groove 124, second guide sliding groove 125, positioning rib 126, extension edge 127;

[0040] Clamping groove 1221, first positioning groove 1222;

[0041] Front shell 13, second clamping portion 130, front panel 131, shell 132, second through hole 133, recess 134, insertion slot 135, second plug 136, extension 137;

[0042] Clamping jaw 1301, first plug 1302;

[0043] Mounting port 101, annular shielding portion 102;

[0044] Inner container 2;

[0045] Container shell 21, connecting pipe 22;

[0046] Recess structure 211, straight extension 212, end surface 221, insertion portion 222;

[0047] Flange connection port 201, connecting frame 202, fixing hole 203;

[0048] Electric heating component 3;

[0049] Water pipe module 4;

[0050] Insulating pipe 41, water pipe 42, first embedding piece 43, sealing ring 44, second embedding piece 45, sleeve 46, first annular plug 47, second annular plug 48, insertion hole 411, threaded hole 451, through hole 461;

[0051] Hanging rack 100. DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0053] It should be noted that, in the description of the present application, the terms of "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0054] In the present application, unless otherwise explicitly specified and limited, the terms of "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] The disclosure that follows provides many different embodiments, or examples, for implementing different structures of the application. For the purpose of simplicity, the elements and settings of the particular examples below are described. Of course, they are merely examples and are not intended to limit the application. Furthermore, the application can be implemented in a variety of settings other than those described below. The repeated use of reference characters in the specification and drawings is intended to represent the presence of a similar or identical feature or element throughout the specification and drawings. Furthermore, various specific processes and materials are described in this disclosure, but other processes and / or materials can be used.

[0057] The electric water heater is a water heater which uses electric energy as the main energy material, and generates high-temperature heat after being electrified to directly heat the water stored in the electric water heater, so as to achieve the purpose of preparing hot water.

[0058] The electric water heater generally comprises a water tank, an electric heating component, and an electric control board, etc. The water tank forms a water storage cavity to store water to be heated. The electric heating component is inserted into the water storage cavity formed by the water tank. The electric control board is used to control the on-off operation of the electric heating component, so that the water in the water tank is heated to a set temperature.

[0059] For the water tank of the electric water heater, the water tank generally comprises an outer shell and an inner container, and a heat preservation layer is formed between the outer shell and the inner container. The outer shell is generally made of plastic material to meet the design requirements of aesthetic and diversified modeling. The inner container can be made of a metal container body or a plastic container body according to needs.

[0060] In addition, the heat preservation layer formed between the outer shell and the inner container is commonly made of materials such as asbestos, sponge, foamed plastic, and polyurethane foam. In conventional technology, in order to obtain good heat preservation effect, the heat preservation layer is generally formed by foaming.

[0061] For the inner container with a metal container body, the inside of the inner container is prone to corrosion due to the influence of water quality. Therefore, a magnesium rod is arranged on the water tank, and the magnesium rod is inserted into the water storage cavity inside the water tank.

[0062] Since magnesium is the metal with the lowest potential in the electrochemical series and is nontoxic in physiology, it is very ideal to be used to make the magnesium rod to protect the inner container. The size of the magnesium rod is directly related to the length of the protection time and the size of the protection effect of the inner container. The larger the magnesium rod is, the better the protection effect is, and the longer the protection time is.

[0063] The water tank is also provided with a water inlet pipe and a water outlet pipe. The water inlet pipe is used to deliver cold water to the water storage cavity formed in the water tank, and the hot water in the water storage cavity is output from the water outlet pipe.

[0064] 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.

[0065] The control board is used to receive detection signals from relevant sensors (such as water temperature sensors and flow sensors) and control the power supply to and from the electric heating components.

[0066] When the electric water heater is working, the electric control board controls the electric heating element to be powered on and heated. When the water temperature in the tank reaches the set value, the electric control board controls the electric heating element to be powered off.

[0067] A water tank for an electric water heater according to an embodiment of the present invention. It should be noted that the water tank of this embodiment can be installed on a vertically extending wall or on a horizontally extending wall.

[0068] For ease of description, the following description uses the example of a water tank installed on a vertical wall to illustrate the structure of the water tank.

[0069] Example 1, such as Figures 1-4 As shown, the present invention also provides an inner tank assembly for use in an electric water heater, wherein the inner tank assembly includes an inner tank 2 and a water pipe assembly 4.

[0070] The inner liner 2 is provided with a connecting pipe 22, and the connecting pipe 22 is provided with internal threads;

[0071] Water pipe module 4, the water pipe module 4 includes an insulating pipe 41 and a water pipe 42. One end of the insulating pipe 41 is provided with a first insert 43. The first insert 43 has a cylindrical structure and an external thread is formed on the outer periphery of the first insert 43. One end of the water pipe 42 is inserted into the insulating pipe 41.

[0072] The other end of the water pipe 42 is inserted into the connecting pipe 22 and extends into the inner liner 2, and the first insert 43 is threaded into the inner thread.

[0073] Specifically, the water pipe module 4 is configured with two sets to meet the requirements of water inlet and outlet. Correspondingly, the inner tank 2 is also configured with two connecting pipes 22. The insulating pipe 41 is assembled and connected to the water pipe 42. One end of the insulating pipe 41 is provided with a first insert 43 by injection molding. The first insert 43 is made of metal to meet the structural strength requirements for connection with the connecting pipe 22.

[0074] During assembly, the first insert 43 engages with the internal thread of the connecting pipe 22 via its external thread to connect and fix the water pipe module 4 to the connecting pipe 22. At the same time, the water pipe 42 extends through the connecting pipe 22 into the inner liner 2.

[0075] And since the insulation tube 41 is connected with the connecting pipe 22 on the inner container 2 by the first embedded part 43 with external thread, the part of the first embedded part 43 extending outside the insulation tube 41 is screwed to the inside of the connecting pipe 22, and the whole length of the insulation tube 41 and the connecting pipe 22 is shortened, and the whole length of the insulation tube 41 outside the connecting pipe 22 is effectively shortened, so as to reduce the volume of the whole electric water heater.

[0076] In some embodiments, in order to improve the connection sealing, a sealing ring 44 can also be sleeved outside the first embedded part 43, and the sealing ring 44 is pressed between the connecting pipe 22 and the insulation tube 41.

[0077] Specifically, after the first embedded part 43 is screwed in the connecting pipe 22, the sealing ring 44 is pressed between the connecting pipe 22, the first embedded part 43 and the insulation tube 41, and the connection part between the water pipe module 4 and the connecting pipe 22 is effectively sealed.

[0078] In another embodiment, in order to meet the connection of the user's household pipeline, a second embedded part 45 can also be provided at the other end of the insulation tube 41, the second embedded part 45 is in a cylindrical structure, and the outer periphery of the second embedded part 45 also forms external thread.

[0079] Specifically, the structure of the second embedded part 45 is similar to that of the first embedded part 43, and by providing external thread outside the second embedded part 45, the pipeline in the user's home is convenient to connect with the insulation tube 41 when installed in the user's home.

[0080] In some embodiments, in order to meet the functional requirements of detecting water temperature, water flow or water quality, a sensor (not shown) is also provided on the water pipe module 4. In order to meet the installation requirements of the sensor, the side wall of the insulation tube 41 is provided with a insertion hole 411, and the side wall of the second embedded part 45 is provided with a threaded hole 451 which penetrates the side wall of the second embedded part 45 and communicates with the insertion hole 411.

[0081] Specifically, the sensor is inserted in the insertion hole 411, and the shell of the sensor is screwed in the threaded hole 451 of the second embedded part 45 in a threaded connection manner, so as to realize the integration of the sensor on the water pipe module 4. In this way, it is more conducive to realize the modular assembly of the factory, so as to improve the overall assembly efficiency of the electric water heater.

[0082] In some embodiments, in order to slow down the mixing flow caused by the inlet and outlet water in the inner container 2, a sleeve 46 is also provided outside the water pipe 42, and a plurality of through holes 461 are provided on the pipe wall of the sleeve 46.

[0083] Specifically, the water pipe 42 is configured as an inlet pipe and an outlet pipe according to needs, and for the inlet pipe, the water flowing into the inner container 2 from the water pipe 42 first enters the sleeve pipe 46, and then is output from the plurality of through holes 461, so as to effectively slow down the water flow rate entering the inner container 2.

[0084] In the preferred embodiment, in order to enrich the functionality of the electric water heater, functional filter material can also be filled between the sleeve pipe 46 and the water pipe 42. Specifically, the functional filter material can be water quality purification material, mineral material or spice, etc. The functional filter material is filled between the sleeve pipe 46 and the water pipe 42 and soaked in the water in the inner container 2. When the user uses the electric water heater to use hot water, the water enters the inner container 2 and flows through the functional filter material, so as to realize water quality purification, mineralization or fragrance treatment, so as to improve the user experience.

[0085] In order to avoid or reduce the functional filter material from being separated from the port part between the sleeve pipe 46 and the water pipe 42, a first annular plug 47 can also be arranged between the upper end of the sleeve pipe 46 and the water pipe 42.

[0086] Specifically, the first annular plug 47 blocks the free end of the sleeve pipe 46, so that the functional filter material cannot leak out of the free end of the sleeve pipe 46. For the mounting and fixing mode of the sleeve pipe 46, the lower end of the sleeve pipe 46 can be connected to the insulating pipe 41, or the lower end of the sleeve pipe 46 is connected to the first embedded part 43. Alternatively, the other end of the sleeve pipe 46 can also be fixed and blocked by the second annular plug 48 cooperating with the water pipe 42.

[0087] By arranging internal threads on the connecting pipe of the inner container and external threads on the first embedded part of the insulating pipe, the insulating pipe is connected to the inner container through the first embedded part, and the first embedded part utilizes the length of the connecting pipe itself to meet the length requirement of the threaded connection, so that a relatively long connecting pipe does not need to be arranged outside the inner container to connect the insulating pipe, and the length of the insulating pipe is effectively shortened, the volume of the electric water heater is reduced, and the space utilization is improved, thereby improving the user experience of the electric water heater.

[0088] In the second embodiment, based on the above-mentioned first embodiment, the specific structure of the inner container 2 is that the inner container 2 has a flat structure as a whole.

[0089] As shown in Figures 5-8 The inner container 2 includes two container shells 21 and a plurality of connecting pipes 22. The container shell 21 has an arc surface structure as a whole, at least one container shell 21 is provided with a fixing hole 203 penetrating the arc surface structure, the edges of the two container shells 21 are welded together, and a water storage cavity is formed between the two container shells 21; the connecting pipe 22 is arranged on the fixing hole 203 and communicates with the water storage cavity.

[0090] Specifically, the inner container 2 has a flat structure, i.e., the thickness is smaller than the length and height. In order to meet the design requirements of the pressure container, the shell 21 has an arc surface structure, so that the inner container 2 has high pressure resistance.

[0091] The connecting pipe 22 is used to connect the water inlet pipe or the water outlet pipe of the electric water heater. The connecting pipe 22 is directly welded to the outer arc surface of the shell 21, so as to be away from the weld formed at the edge of the shell 21. Thus, the straight line segment at the edge of the shell 21 or the length of the straight line segment can be reduced, so as to effectively reduce the overall thickness of the inner container 2.

[0092] In actual use, the overall shape of the inner container 2 can be designed according to requirements, for example, the inner container 2 can have a circular or elliptical structure, which is not limited herein. In some embodiments, one end surface 221 of the connecting pipe 22 is provided with a protruding plug-in part 222 arranged around the pipe opening of the connecting pipe 22. The plug-in part is inserted into the fixing hole 203, and the connecting pipe 22 is welded to the fixing hole 203.

[0093] Specifically, in order to improve the installation reliability of the connecting pipe 22 and enable the connecting pipe 22 to be quickly and accurately installed and fixed on the arc surface, in actual assembly, the connecting pipe 22 can be first inserted into the corresponding fixing hole 203 through the plug-in part. After the plug-in part is inserted into the fixing hole 203, the connecting pipe 22 is pre-assembled into the fixing hole 203, so as to accurately position the relative position between the connecting pipe 22 and the shell 21.

[0094] After the connecting pipe 22 is pre-assembled into the fixing hole 203, the connecting pipe 22 can be welded to the shell 21. In the welding process, a weld is formed around the outer periphery of the connecting pipe 22. The welding method can be a conventional welding method, which is not limited and described herein.

[0095] Preferably, the shape of the end surface 221 of the plug-in part of the connecting pipe 22 matches the shape of the outer periphery of the fixing hole 203.

[0096] Specifically, since the connecting pipe 22 needs to be welded to the arc surface of the shell 21, the welding position accuracy of the connecting pipe 22 determines the product yield. By designing the shape of the end surface 221 to match the shape of the outer periphery of the fixing hole 203, when the connecting pipe 22 is pre-assembled through the plug-in part, the end surface 221 cooperates with the arc surface of the shell 21, so that the connecting pipe 22 can be accurately pre-positioned and installed.

[0097] Meanwhile, during the welding process, the cooperation between the end face 221 and the arc surface of the shell 21 makes the position of the connecting pipe 22 not easy to rotate and skew, thereby improving the welding quality and being more conducive to meeting the requirement of welding the connecting pipe 22 on the arc surface of the shell 21,

[0098] In some other embodiments, the fixing hole 203 is punched on the shell 21, and the concave structure 211 is formed around the fixing hole 203 on the shell 21.

[0099] Specifically, during the punching process, the fixing hole 203 is formed on the shell 21, and at the same time, the concave structure 211 is formed around the fixing hole 203. During the assembly of the connecting pipe 22, the end face 221 will be positioned against the surface of the concave structure 211, and during the welding process, the solder will also fill the area where the concave structure 211 is located, thereby making the welding seam more uniform, improving the welding reliability and sealing performance between the connecting pipe 22 and the shell 21, and reducing or avoiding water leakage.

[0100] In some other embodiments, the edge of the arc surface structure of the shell 21 is provided with a straight extension 212, and the two straight extensions are welded together.

[0101] Specifically, the purpose of further forming the straight extension 212 at the edge of the shell 21 is to more conveniently and reliably weld two shells 21 together. Therefore, in the actual product design process, the width of the straight extension 212 only needs to meet the welding requirement, so the width of the straight extension 212 is relatively narrow, and the width of the straight extension 212 can be designed to be less than 10 mm.

[0102] In some other embodiments, in order to avoid the welding stress deformation of the shape of the fixing hole 203 caused by the heat generated during the welding of the shell 21, the nearest distance L of the fixing hole 203 from the edge of the straight extension is not less than 7 mm.

[0103] In some embodiments, in order to meet the installation requirement of the electric heating component, one of the shells 21 is provided with a flange connection port 201. The electric heating component can extend into the water storage cavity through the flange connection port 201 and be connected and fixed to the flange connection port 201.

[0104] In some embodiments, in order to meet the requirement of the suspension installation of the water tank, the other shell 21 can also be provided with a connecting frame 202, and the connecting frame 202 can be fixed and installed on the shell 21 in a welded manner. In use, the inner container 2 is fixed and suspended on the wall through the connecting frame 202.

[0105] In order to effectively improve the space utilization, the connecting frame 202 is arranged at the middle upper part of the tank shell 21 for the inner tank 2. Specifically, after the inner tank 2 is vertically installed on the wall, the distance between the middle part of the inner tank 2 and the wall is the smallest, and along the arc surface of the tank shell 21, the distance between the inner tank 2 and the wall gradually increases in the direction towards the edge of the inner tank 2. By connecting the connecting frame 202 to the middle upper part of the tank shell 21, the space between the upper part of the inner tank 2 and the wall can be fully utilized to achieve the suspension installation.

[0106] Based on the above-mentioned embodiment two, the embodiment of the present application is specially designed for the flat inner tank 2, and the flat outer shell 1 has the following structural design.

[0107] As shown in the embodiment three, Figures 9-14 The present application also provides a thermal insulation water tank used by an electric water heater, which adopts a flat design to reduce the effective space occupied by the electric water heater in the room. The thermal insulation water tank comprises an outer shell 1, an inner tank 2 and an electric heating component 3 assembled together. Since the outer shell 1 and the inner tank 2 are both flat structures, the outer shell 1, the inner tank 2 and the electric heating component 3 are improved in structure as follows.

[0108] The front part of the outer shell 1 is provided with a mounting port 101, and the inner wall of the outer shell 1 is further provided with an annular shielding part 102 arranged around the mounting port 101.

[0109] The front part of the inner tank 2 is provided with a flange connecting port 201.

[0110] The inner tank 2 is located in the outer shell 1, the annular shielding part 102 surrounds the outer side of the flange connecting port 201, a thermal insulation layer (not shown) is arranged between the outer shell 1 and the inner tank 2, and the electric heating component 3 is arranged on the flange connecting port 201 and extends into the inner tank 2.

[0111] Specifically, the whole water tank adopts a flat design, and the thickness dimension is smaller than the height and length dimensions. In order to meet the installation requirements of the electric heating component 3 and also meet the maintenance requirements of the electric heating component 3 in the later period, the mounting port 101 is arranged at the front part of the outer shell 1, and the flange connecting port 201 is arranged at the front part of the inner tank 2.

[0112] When the electric heating component 3 needs to be assembled, the electric heating component 3 can be inserted from the mounting port 101 and extended into the inner tank 2 through the flange connecting port 201 to complete the assembly. Similarly, when the electric heating component 3 needs to be replaced and maintained in the later period, the electric heating component 3 can be disassembled from the inner tank 2 through the mounting port 101 and taken out conveniently.

[0113] At the same time, for the flat structure water tank, the electric heating component 3 is installed at the front of the inner container 2, so as to fully utilize the area of the front surface of the inner container 2 to firmly and reliably install the electric heating component 3.

[0114] More importantly, in order to reduce or avoid overflow of the foaming material from the flange connecting port 201 of the inner container 2 during foaming, the annular shielding portion 102 extending towards the flange connecting port 201 is formed on the inner wall of the outer shell 1, and the annular shielding portion 102 is in a cylindrical structure as a whole and surrounds the periphery of the mounting port 101. After the inner container 2 is installed in the outer shell 1, the annular shielding portion 102 will surround the periphery of the flange connecting port 201, and thus a region for blocking the leakage of the foaming material is formed between the annular shielding portion 102 and the flange connecting port 201.

[0115] The foaming cavity is formed between the outer shell 1 and the inner container 2, and after the foaming material is injected into the foaming cavity, the foaming material can be blocked by the annular shielding portion 102 when flowing to the flange connecting port 201, thereby reducing the leakage of the foaming material from the flange connecting port 201.

[0116] In some embodiments, in order to improve the effect of preventing overflow, the edge of the annular shielding portion 102 abuts against the outer wall of the inner container 2.

[0117] Specifically, after the inner container 2 is installed in the outer shell 1, the edge of the annular shielding portion 102 abuts against the outer wall of the inner container 2, so that the leakage of the foaming material from the flange connecting port 201 can be better blocked by the annular shielding portion 102 during the foaming process.

[0118] In a preferred embodiment, in order to facilitate assembly, a gap is formed between the edge of the annular shielding portion 102 and the outer wall of the inner container 2. Further, in order to reduce the leakage of the foaming material from the gap, a first flexible sealing portion (not shown) can be arranged outside the annular shielding portion 102, and the first flexible sealing portion blocks the gap.

[0119] Specifically, during assembly, the first flexible sealing portion is first wound outside the annular shielding portion 102 and extends to the edge of the annular shielding portion 102. After the inner container 2 is installed in the outer shell 1, the first flexible sealing portion deforms due to its elasticity and abuts tightly against the outer wall of the inner container 2, so as to effectively seal the gap formed between the annular shielding portion 102 and the inner container 2 by the first flexible sealing portion.

[0120] Similarly, a second flexible sealing portion can also be arranged outside the flange connecting port 201, and the second flexible sealing portion blocks the gap.

[0121] Specifically, during the assembling process, the second flexible sealing part is first wound around the flange connecting port 201 on the inner container 2. After the inner container 2 is installed into the outer shell 1, the annular shielding part 102 is pressed on the second flexible sealing part, so as to effectively seal the gap between the annular shielding part 102 and the inner container 2 through the second flexible sealing part.

[0122] In actual use, the specific performance entity of the flexible sealing part can be a rubber cotton or a sealing ring, which is not limited here.

[0123] In another embodiment, in order to better block the foaming material flowing to the flange connecting port 201 by the annular shielding part 102, the outer diameter of the annular shielding part 102 gradually decreases from the mounting port 101 to the flange connecting port 201.

[0124] Specifically, the cross section of the annular shielding part 102 is a horn structure, the opposite end of the annular shielding part 102 to the inner container 2 has a smaller size, and the outer wall of the annular shielding part 102 forms an inclined surface. On the one hand, the smaller end port blocks the overflow of the foaming material, and on the other hand, the inclined outer wall ensures that the foaming material can flow along it to uniformly distribute the foaming material outside the inner container 2.

[0125] In some embodiments, in order to effectively position the inner container 2 in the outer shell 1 before foaming, so as to avoid the inner container 2 from being offset in the outer shell 1 during the foaming process, a connecting frame 202 is arranged on the back of the inner container 2, and threaded holes (not labeled) are arranged on the connecting frame 202. Correspondingly, a hanging frame 100 is arranged on the back of the outer shell 1, and mounting holes (not labeled) are arranged on the hanging frame 100; a bolt passes through the mounting holes and extends into the outer shell 1 and is screwed in the threaded holes 451, and the connecting frame 202 abuts against the inner wall of the outer shell 1.

[0126] Specifically, after the inner container 2 is installed into the outer shell 1, the inner container 2 is fixed on the outer shell 1 through the connecting frame 202, and at the same time, the connecting frame 202 is connected with the hanging frame 100 through the bolt, which also serves as a mounting function of the hanging frame 100.

[0127] In another embodiment, the mounting port 101 is formed on the front of the outer shell 1, and in order to optimize the appearance, the front panel 131 arranged on the front of the outer shell 1 can be used for shielding. In normal use, the front panel 131 is fixed on the front of the outer shell 1 to shield the mounting port 101, and when the electric heating component 3 needs to be repaired, the front panel 131 is removed.

[0128] By configuring an installation port at the front of the outer shell to meet the requirements of electric heating component installation and subsequent maintenance, and with an inwardly extending annular shielding part formed around the installation port inside the outer shell, the annular shielding part surrounds the flange connection port of the inner liner. Since the annular shielding part cooperates with the front surface of the inner liner, it can better prevent material overflow around the flange connection port. In this way, during the foaming process, after the foaming material flows between the outer shell and the inner liner, the flow of foaming material to the flange connection port of the inner liner can be blocked by the annular shielding part, thereby reducing the overflow of foaming material, improving foaming quality, and thus improving product quality.

[0129] Based on the above embodiments two and three, the embodiments of the present invention also have the following structural design for the outer shell 1.

[0130] Example 4, as follows Figures 12-14 As shown, the outer shell 1 in embodiments two and three above adopts a flat design and an overall curved surface design to achieve a good appearance design effect.

[0131] To achieve a screwless design for the front view, the following structural design is adopted for the outer casing 1.

[0132] The housing 1 includes:

[0133] The rear cover 11 has a first screw hole 111 on its edge, and the back of the rear cover 11 forms a mounting surface.

[0134] The liner 12 has a first through hole 121 on its edge, a first snap-fit ​​part 122 on its outer surface, an installation opening 101 on its surface, and an annular blocking part 102 on its inner wall.

[0135] The front shell 13 has a second snap-fit ​​portion 130 on its inner surface;

[0136] The liner 12 is connected to the rear shell 11, the screw passes through the first through hole 121 and is threaded into the corresponding first screw hole 111, the front shell 13 covers the liner 12, and the first snap-fit ​​part 122 is connected to the corresponding second snap-fit ​​part 130.

[0137] The rear shell 11 and the liner 12 in the outer shell 1 are connected by screws, forming an installation cavity for installing the inner liner. The screw connection between the rear shell 11 and the liner 12 provides sufficient structural strength to meet the structural strength requirements for the subsequent foaming of the insulation layer between the outer shell 1 and the inner liner.

[0138] For the connecting process between the rear shell 11 and the backing plate 12, specifically, after the rear shell 11 and the backing plate 12 are butted together, the first through hole 121 is aligned with the corresponding first screw hole 111, and then the screw is threaded through the first through hole 121 and screwed into the first screw hole 111. In this way, the rear shell 11 and the backing plate 12 are firmly and reliably fastened together by the screw.

[0139] In order to achieve the appearance effect of no exposed screw, the front shell 13 is installed on the backing plate 12 by clamping. Specifically, after the rear shell 11 and the backing plate 12 are fixedly connected together, since the first through hole 121 on the backing plate 12 can be seen from the front of the shell 1, in order to make the overall appearance not expose the first through hole 121 and the screw, the first through hole 121 is shielded by the front shell 13.

[0140] For the connecting process between the front shell 13 and the backing plate 12, specifically, the second clamping part 130 on the front shell 13 is clamped with the first clamping part 122 at the corresponding position on the backing plate 12 to achieve clamping the front shell 13 on the backing plate 12. At the same time, the first through hole 121 is shielded by the front shell 13, so that the first through hole 121 cannot be seen from the outside of the shell assembly, achieving the overall appearance effect of no exposed screw. And since the clamping connection part is shielded by the front shell 13, the appearance effect is optimized.

[0141] In some embodiments, the specific performance entity of the first clamping part 122 and the second clamping part 130 can adopt various structural forms, which are illustrated as follows.

[0142] The second clamping part 130 includes a clamping jaw 1301, and the first clamping part 122 includes a clamping slot 1221, and the clamping jaw 1301 is clamped in the clamping slot 1221.

[0143] Specifically, when the front shell 13 and the backing plate 12 are clamped and connected, the clamping jaw 1301 is clamped into the clamping slot 1221, and the clamping jaw 1301 and the clamping slot 1221 cooperate to connect the front shell 13 and the backing plate 12 together.

[0144] In order to improve the connection strength, the second clamping part 130 further includes a first insertion tongue 1302, and the first clamping part 122 further includes a first positioning slot 1222, and the first insertion tongue 1302 is inserted into the first positioning slot 1222.

[0145] Specifically, during assembly, the first insertion tongue 1302 is first inserted into the first positioning slot 1222 to pre-position the front shell 13 and the backing plate 12, and then the clamping jaw 1301 is clamped in the clamping slot 1221 to complete the assembly between the front shell 13 and the backing plate 12.

[0146] The opening direction of the first positioning slot 1222 and the clamping slot 1221 is opposite. In this way, the connecting part formed by the clamping tongue and the clamping slot 1221 cooperates with the connecting part formed by the first insertion tongue 1302 and the first positioning slot 1222, so that the front shell 13 can be more firmly and reliably mounted on the outer wall of the lining plate 12.

[0147] In another embodiment, since the clamping jaw 1301 and the first insertion tongue 1302 are both located on the inner wall of the front shell 13, when assembled, the inner wall of the front shell 13 cooperates with the outer wall of the lining plate 12, so that it is difficult for the operator to accurately insert the first insertion tongue 1302 into the positioning slot.

[0148] Therefore, the first guide sliding groove 124 and the second guide sliding groove 125 can be arranged on the outer surface of the lining plate 12, the first guide sliding groove 124 extends to the clamping slot 1221, and the second guide sliding groove 125 extends to the positioning slot.

[0149] Specifically, when assembled, the operator can first place the clamping jaw 1301 in the first guide sliding groove 124, and at the same time, the first insertion tongue 1302 is arranged in the second guide sliding groove 125.

[0150] Then, the operator slides the front shell 13 along the first guide sliding groove 124 and the second guide sliding groove 125, so that the first insertion tongue 1302 is accurately inserted into the first positioning slot 1222, and finally the clamping jaw 1301 is clamped in the clamping slot 1221.

[0151] Under the guidance of the first guide sliding groove 124 and the second guide sliding groove 125, the guide sliding groove can cooperate with the first insertion tongue 1302 and the clamping jaw 1301 to guide the sliding of the front shell 13.

[0152] Further, at the initial stage of installation, the front shell 13 and the lining plate 12 can be far apart, so that the operator can observe the positions of the clamping jaw 1301 and the first insertion tongue 1302, and thus ensure that the clamping jaw 1301 and the first insertion tongue 1302 are accurately placed in the corresponding guide sliding groove.

[0153] Then, during the sliding process along the guide sliding groove, the distance between the front shell 13 and the lining plate 12 gradually decreases, and the operator relies on the guiding effect of the guide sliding groove to ensure that the first insertion tongue 1302 is inserted into the first positioning slot 1222 first.

[0154] Finally, the clamping jaw 1301 is clamped in the clamping slot 1221, so that the front shell 13 and the lining plate 12 are firmly connected together.

[0155] In other embodiments, in order to further improve the connection strength between the front shell 13 and the lining plate 12, the front shell 13 is improved as follows.

[0156] The front shell 13 comprises:

[0157] a front panel 131;

[0158] a shell 132, the shell 132 being provided with a second clamping portion 130, and the shell 132 being further provided with a second through hole 133;

[0159] The second screw hole 123 is further provided on the backing plate 12, the screw passes through the second through hole 133 and is screwed into the corresponding second screw hole 123, and the front panel 131 covers the second through hole 133 and is arranged on the front panel 131.

[0160] Specifically, the front shell 13 adopts a split design, the shell 132 is installed on the backing plate 12 by cooperating with the first clamping portion 122 through the second clamping portion 130. At the same time, the shell 132 and the backing plate 12 are further firmly connected by the screw. The screw connecting the shell 132 and the backing plate 12 is shielded by the front panel 131 to meet the appearance design requirement that no screw is exposed on the front of the shell 1.

[0161] In an embodiment, the shell 132 is provided with a recess 134, the second through hole 133 is located in the recess 134, and the front panel 131 is arranged in the recess 134.

[0162] Specifically, the recess 134 is arranged on the front of the shell 132, and the front panel 131 is placed in the recess 134, so that the front of the shell 1 is more flat. At the same time, the second through hole 133 is located in the recess 134, so that the second through hole 133 can be shielded by the front panel 131 after the front panel 131 is assembled into the recess 134.

[0163] In another embodiment, in order to realize the convenient and firm installation of the front panel 131 on the shell 132, the recess 134 is further provided with a slot 135, and the front panel 131 is provided with a second plug 136, which is arranged in the corresponding slot 135.

[0164] Specifically, after the shell 132 is installed on the backing plate 12, the front panel 131 is inserted into the corresponding slot 135 through the plug arranged thereon to complete the installation. The plug and the slot 135 cooperate with each other to realize the appearance effect that no screw is exposed on the front of the shell 1.

[0165] In order to further improve the connection reliability of the front panel 131, an extension 137 extending towards the direction of the backing plate 12 is arranged on the upper portion of the front panel 131, and a third screw hole (not shown) is arranged on the extension 137, and a counterbore (not shown) is arranged on the shell 132, and the screw is screwed into the third screw hole through the counterbore.

[0166] Specifically, in order to meet the requirements of the appearance design, the extension 137 can be arranged on the upper portion or the lower portion of the front panel 131 according to the mounting position of the shell 1. The extension 137 is arranged on the bottom portion of the front panel 131, and correspondingly, the counterbore is arranged on the bottom portion of the shell 132. After the front panel 131 is connected and fixed to the shell 132 through the cooperation of the plug and the slot 135, the screw is further connected and fixed from the bottom portion.

[0167] Preferably, a detachable plug (not shown) can also be arranged on the counterbore. After the front panel 131 is fixed to the shell 132 through the screw, the plug is used to cover the screw in the counterbore, so as to further meet the design requirements of the shell 1 that there is no screw exposed on the front surface.

[0168] In some embodiments, in order to facilitate the on-site assembly of the backing plate 12 and the rear shell 11 by the operator, the inner wall of the rear shell 11 is provided with a mounting table 112, and the mounting table 112 is provided with the first threaded hole.

[0169] Specifically, during the assembly process, the mounting table 112 can support and position the backing plate 12, so as to facilitate the operator to quickly connect and assemble the backing plate 12 and the rear shell 11 together.

[0170] In another embodiment, in order to facilitate the positioning and assembly of the rear shell 11 and the backing plate 12, a second positioning groove 113 can be arranged on the mounting table 112, and the edge of the backing plate 12 is clamped in the second positioning groove 113.

[0171] Specifically, during the assembly of the rear shell 11 and the backing plate 12, the edge of the backing plate 12 can be inserted into the second positioning groove 113 first, so that the rear shell 11 and the backing plate 12 are pre-assembled together.

[0172] Then, the relative position between the rear shell 11 and the backing plate 12 is adjusted, so that the first through hole 121 is aligned with the first threaded hole 111.

[0173] Finally, the screw is screwed into the first threaded hole 111 through the first through hole 121, so that the rear shell 11 and the backing plate 12 are firmly and reliably assembled together.

[0174] In order to accurately position the position relationship between the rear shell 11 and the lining plate 12, so as to improve the assembly accuracy. The inner wall of the rear shell 11 can be provided with a stepped surface 114, and the outer wall of the lining plate 12 is provided with a positioning rib 126 which abuts against the stepped surface 114.

[0175] Specifically, in the process of assembling the rear shell 11 and the lining plate 12, reference is made to the above-mentioned pre-positioning process through the positioning groove, so that the rear shell 11 and the lining plate 12 are pre-assembled together. At the same time, after the edge of the lining plate 12 is inserted into the positioning groove, the positioning rib 126 on the lining plate 12 will abut against the stepped surface 114, thereby accurately positioning the rear shell 11 and the lining plate 12, so as to improve the overall assembly quality of the shell assembly.

[0176] In an embodiment, the edge of the rear shell 11 is also provided with a blocking rib 115 which is located outside the stepped surface 114, and the edge of the front shell 13 is provided with an extension edge 127 which surrounds the outside of the blocking rib 115.

[0177] Specifically, the front shell 13 can cover the entire outer surface of the lining plate 12, and the front shell 13 can cover the lining plate 12 as a whole outside the lining plate 12, thereby optimizing the visual effect of the appearance. At the same time, for the blocking rib 115 formed on the edge of the rear shell 11, on the one hand, during assembly, the blocking rib 115 can be pre-positioned by cooperating with the extension edge 127, so as to improve the assembly efficiency and accuracy; on the other hand, the blocking rib 115 is shielded by the extension edge 127 formed by the edge of the front shell 13, which is more conducive to improving the overall appearance effect.

[0178] In a preferred embodiment, for the butt joint area between the front shell 13 and the rear shell 11, the edge of the front shell 13 is aligned with the edge of the rear shell 11, thereby reducing the size of the connection gap generated at the butt joint area of the front shell 13 and the rear shell 11.

[0179] In addition, the number of connection parts between the rear shell 11 and the lining plate 12, and the number of connection parts between the front shell 13 and the lining plate 12, are mainly designed according to the overall size of the shell assembly.

[0180] For example, a plurality of mounting tables 112 can be provided on the edge of the rear shell 11, and the plurality of mounting tables 112 are distributed along the edge of the rear shell 11.

[0181] Correspondingly, the lining plate 12 is provided with a corresponding number of first through holes 121 corresponding to the mounting tables 112, so as to connect and fix the rear shell 11 and the lining plate 12 by a plurality of screws.

[0182] Similarly, the number of clamping connections between the front shell 13 and the lining plate 12 is also provided with a plurality, which is not limited here.

[0183] By adopting the lining plate and indirectly connecting the front shell and the rear shell together, the lining plate and the rear shell are tightly connected together through the screw to meet the overall structural strength requirement of the shell, and the front shell is connected with the lining plate through the clamping mode, the front shell covers the lining plate and further shields the screw, so that the overall effect of the shell realizes the appearance effect of no screw exposed, the overall appearance of the shell is optimized, and the user experience is improved.

[0184] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0185] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. An electric water heater comprising a housing, characterised in that, Further comprising a liner assembly arranged in the shell; The liner assembly comprises: a liner, a connecting pipe arranged on the liner, the connecting pipe being provided with internal threads, a flange connection port arranged on the front part of the liner; a water pipe module, the water pipe module comprising an insulation pipe and a water pipe, one end of the insulation pipe being provided with a first embedding piece, the first embedding piece being in a cylindrical structure, the outer periphery of the first embedding piece being formed with external threads, one end of the water pipe being inserted into the insulation pipe; wherein the other end of the water pipe is inserted into the connecting pipe and extends into the liner, the first embedding piece being threadedly connected in the internal threads; The shell comprises a rear shell, a backing plate and a front shell, the edge of the rear shell being provided with first screw holes, the back of the rear shell forming a mounting surface; the edge of the backing plate being provided with a first through hole, the outer surface of the backing plate being further provided with a first clamping part; the inner surface of the front shell being provided with a second clamping part; the backing plate and the rear shell are connected together, the screw passes through the first through hole and is threadedly connected in the corresponding first screw hole, the front shell covers the backing plate, and the first clamping part and the corresponding second clamping part are connected together; The first clamping part comprises a clamping groove and a first positioning groove, and the second clamping part comprises a clamping jaw and a first insertion tongue; the clamping jaw is clamped in the clamping groove, and the first insertion tongue is inserted in the first positioning groove; the outer surface of the backing plate is provided with a first guide sliding groove and a second guide sliding groove, the first guide sliding groove extending to the clamping groove, and the second guide sliding groove extending to the first positioning groove.

2. The electric water heater according to claim 1, wherein The first embedding piece is further sleeved with a sealing ring, the sealing ring being pressed between the connecting pipe and the insulation pipe.

3. The electric water heater according to claim 1, wherein The other end of the insulation pipe is provided with a second embedding piece, the second embedding piece being in a cylindrical structure, and the outer periphery of the second embedding piece also being formed with external threads.

4. The electric water heater according to claim 3, wherein The side wall of the insulation pipe is provided with a insertion hole, the side wall of the second embedding piece is provided with a threaded hole, the threaded hole penetrating through the side wall of the second embedding piece and communicating with the insertion hole.

5. The electric water heater according to claim 4, wherein A sensor is arranged in the insertion hole, the sensor being threadedly connected in the threaded hole.

6. The electric water heater according to claim 1, wherein The water pipe is further provided with a sleeve, a plurality of through holes being arranged on the pipe wall of the sleeve.

7. The electric water heater according to claim 6, wherein Functional filter material is further filled between the sleeve and the water pipe.

8. The electric water heater according to claim 7, wherein A first annular plug is arranged between the upper end of the sleeve and the water pipe.

9. The electric water heater according to claim 7, wherein The lower end of the sleeve is connected on the insulation pipe, or the lower end of the sleeve is connected on the first embedding piece, or a second annular plug is arranged between the lower end of the sleeve and the water pipe.

10. The electric water heater according to claim 1, wherein A thermal insulation layer is arranged between the liner assembly and the shell.

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