Electric water heater and assembling method thereof

Abstract

The invention belongs to the technical field of water heaters, and particularly relates to an electric water heater and an assembling method thereof. The electric water heater comprises a shell, an electrical chamber, a first end cover, a second end cover and an inner container, the inner container is sleeved with the shell and fixedly connected with the shell, and the electrical chamber is connected with the first end cover; the first end cover and the second end cover are arranged at the two ends of the shell in a covering mode respectively, the first end cover abuts against the first end of the inner container, a material injection opening is formed in the first end cover, the second end cover is adjacent to the second end of the inner container, and a lifting lug is arranged at the second end. According to the electric water heater, the first end of the inner container of the electric water heater abuts against the first end cover and is fixedly connected with the inner container and the shell, the second end of the inner container can be adjacent to the second end cover, a foam cushion layer does not need to be arranged between the second end of the inner container and the second end cover, and the structure is simpler and more compact. Therefore, the installation procedures are reduced, and the assembly efficiency of the electric water heater is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of water heaters, and in particular, relates to an electric water heater and an assembly method thereof. Background Art

[0002] An electric water heater is a device that uses electricity to heat cold water into hot water. It has many advantages, such as stable water flow, safety and environmental protection, easy installation, and not easily affected by weather.

[0003] At present, when assembling an electric water heater, it is generally installed from the end cover (second end cover) on the side away from the electrical room. After the second end cover is connected to the shell, a foam cushion is set, the inner tank is hoisted near the shell, the inner tank is turned over and adjusted, and the inner tank is placed on the foam cushion of the second end cover. Then, the inlet and outlet pipe components and the hanger component are installed, and then the end cover (first end cover) close to the electrical room and the electrical room are installed. Finally, the foam material is injected from the injection port on the first end cover to complete the installation.

[0004] However, the structure and assembly method of the existing electric water heater are complicated, resulting in low assembly efficiency of the electric water heater. Summary of the invention

[0005] The present application provides an electric water heater and an assembly method thereof, so as to solve the problem that the structure and assembly method of the existing electric water heater are complicated, resulting in low assembly efficiency of the electric water heater.

[0006] On the one hand, the present application provides an electric water heater, comprising a shell, an electrical chamber, a first end cover, a second end cover and an inner tank, wherein the shell is sleeved on the inner tank and fixedly connected to the inner tank, and the electrical chamber is connected to the first end cover;

[0007] The first end cover and the second end cover are respectively covered at the two ends of the shell, the first end cover abuts against the first end of the inner liner, and the first end cover has a material injection port, the second end cover is adjacent to the second end of the inner liner, and the second end is provided with a lifting ear.

[0008] In a possible implementation, the electric water heater provided by the present application is formed integrally with the electrical chamber, and the first end cover has at least two positioning members arranged at intervals in the circumferential direction around the first end, and the first end matches and abuts against the positioning members;

[0009] A set interval is provided between the second end cover and the second end.

[0010] In one possible implementation, the electric water heater provided in the present application has an inner tank including two sub-tanks arranged side by side, the two sub-tanks are connected, and the two sub-tanks are connected by a lifting ear, which is located between the first end and the second end and close to the second end.

[0011] In a possible implementation, the electric water heater provided by the present application further includes an inlet and outlet water pipe assembly and a hanger assembly, wherein the inlet and outlet water pipe assembly includes an inlet and outlet water pipe and an integrally injection-molded threaded connector, and the inlet and outlet water pipe are connected to the threaded connector;

[0012] The shell body is provided with a mounting hole, a positioning sleeve is provided on the mounting hole, the inlet and outlet water pipes pass through the positioning sleeve and are coaxially inserted in the inner tank, and the threaded connector is used to communicate with the water pipe;

[0013] The inner liner and the shell are both fixedly connected to the hanger assembly.

[0014] In a possible implementation, the electric water heater provided in the present application has at least two injection ports on the first end cover, and the injection ports are located on one side of the first end cover close to the edge thereof so that the injection ports avoid the first end.

[0015] On the other hand, the present application also provides an electric water heater assembly method, which is used to assemble any of the above electric water heaters, comprising the following steps:

[0016] Installing a first end cover and an electrical chamber at the lower part of the shell;

[0017] The inner liner is hoisted into the shell through the lifting ear located at the second end of the inner liner, and the first end of the inner liner faces the first end cover and abuts against the first end cover;

[0018] Fixedly connecting the inner tank and the shell;

[0019] Install the second end cover on the upper part of the shell so that the second end cover is adjacent to the second end of the inner container;

[0020] The shell is turned over so that the first end cover faces upward, and the foaming material is injected through the injection port of the first end cover to fill the gap between the inner container and the shell.

[0021] In a possible implementation, the electric water heater assembly method provided in the present application installs a first end cover and an electrical chamber at the lower part of the shell, including:

[0022] An integrally formed first end cover and an electrical chamber are installed at the lower portion of the shell.

[0023] In a possible implementation, the electric water heater assembly method provided by the present application, wherein the first end of the inner tank faces the first end cover and abuts against the first end cover, comprises:

[0024] The first end of the inner container moves toward at least two positioning members on the first end cover until the first end is positioned and abutted against the positioning members so that the extension direction of the inner container is consistent with the extension direction of the shell, wherein the positioning members are arranged at circumferential intervals around the first end and match the first end.

[0025] In a possible implementation, the electric water heater assembly method provided in the present application, fixedly connecting the inner tank and the shell, includes:

[0026] Install the hanger assembly on the shell and the inner tank bracket, install the positioning sleeve on the mounting hole of the shell, and then install the inlet and outlet water pipe assembly in the positioning sleeve, and fix the shell and the inner tank through the hanger assembly.

[0027] In a possible implementation, the electric water heater assembly method provided in the present application installs the second end cover above the housing, including:

[0028] A set interval is left between the second end and the second end cap.

[0029] The electric water heater and its assembly method provided by the present application, wherein the second end of the inner tank of the electric water heater can be adjacent to the second end cap by making the first end of the inner tank abut against the first end cap, and the inner tank and the shell are fixedly connected, and there is no need to set a foam cushion layer between the second end of the inner tank and the second end cap, and the structure is simpler and more compact. Compared with the existing electric water heater structure, since the first end cap can directly and stably abut against the first end of the inner tank, after the inner tank is hoisted to the shell through the lifting ear located at the second end of the inner tank, the relative position of the inner tank and the shell is determined accordingly, and there is no need to adjust the posture of the inner tank during the hoisting process. Then, the inner tank and the shell can be directly fixed based on this as a reference, and the relative displacement between the inner tank and the shell is limited, thereby avoiding the rigid abutment between the second end of the inner tank and the second end cap, and there is no need to set a foam cushion layer between the two for buffering, so that the structure of the electric water heater is further simplified. The structure and assembly method of the electric water heater are simplified, and the assembly efficiency of the electric water heater is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] The preferred technical implementation scheme of the present application is described below with reference to the accompanying drawings. The accompanying drawings are:

[0032] Figure 1 A schematic diagram of the structure of the electric water heater provided in the embodiment of the present application;

[0033] Figure 2 A schematic structural diagram of the electric water heater provided in an embodiment of the present application from another perspective;

[0034] Figure 3 A schematic diagram of a flow chart of an electric water heater assembly method provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of the structure of the assembled shell and the first end cover in the electric water heater provided in the embodiment of the present application;

[0036] Figure 5 A schematic diagram of the structure of assembling an inner tank into a shell of an electric water heater provided in an embodiment of the present application;

[0037] Figure 6 A schematic diagram of the structure of assembling a positioning sleeve onto a shell in an electric water heater provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram of the structure of assembling the water inlet and outlet pipe components to the shell and the inner tank of the electric water heater provided in the embodiment of the present application;

[0039] Figure 8 A schematic diagram of the structure of assembling the second end cover onto the shell of the electric water heater provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 100-housing; 110-first end cover; 111-injection port; 112-positioning member; 120-second end cover; 130-electrical room; 131-inspection cover; 140-mounting hole; 141-positioning sleeve; 150-sealing ring;

[0042] 200- liner; 210- first end; 220- second end; 230- sub-liner; 240- hanging ear;

[0043] 300-inlet and outlet water pipe assembly; 310-inlet and outlet water pipes; 311-inlet pipe; 312-outlet pipe; 320-threaded connector;

[0044] 400- bracket assembly; 410- liner bracket; 420- exterior wall bracket; 430- pad.

[0045] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0048] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0049] The existing electric water heater includes a shell, a first end cover, a second end cover, an inner tank, an electrical chamber and a foam cushion layer. The first end cover is connected to the electrical chamber and is covered on one end of the shell. The first end of the inner tank is fixedly connected to the first end cover, and the second end cover is covered on the other end of the shell. The foam cushion layer is located between the second end cover and the second end of the inner tank and abuts against the second end.

[0050] The assembly method of the electric water heater is as follows:

[0051] Step 1: First, lift the liner to the pre-installation position through the lifting ears, put the liner down and bend and flatten the two lifting ears so that the lifting ears do not extend out of the second end of the liner to avoid interference with subsequent installation. The lifting ears are set at the second end of the liner, and the two sub-liners of the liner are respectively installed with lifting ears;

[0052] Step 2: Install the second end cover to the lower part of the shell, and make the vertical edge of the second end cover sealedly connected to the shell;

[0053] Step 3: Lay a foam cushion layer on the second end cover to support the inner liner and provide buffering and heat insulation for the inner liner;

[0054] Step 4: Flip and adjust the posture of the inner liner, then place the inner liner into the shell, and make the second end of the inner liner match and abut against the foam cushion layer of the second end cover;

[0055] Step 5: Install the positioning sleeve on the installation hole of the shell, install the inlet and outlet pipe assembly on the positioning sleeve, and then install the external wall bracket assembly to fix the shell and the inner tank through the inlet and outlet pipe assembly and the external wall bracket assembly. During this period, the relative position height of the inner tank and the shell needs to be adjusted;

[0056] Step 6: Install the first end cover on the upper side of the shell so that the vertical edge of the first end cover is sealed and connected to the shell;

[0057] Step 7: Install the electrical chamber on the first end cover so that the mounting portion on the electrical chamber matches and is fixedly connected with the first end of the inner tank to ensure accurate installation between the inner tank and the shell, and set a sealing ring between the first end cover and the first end;

[0058] Step 8: Injecting the foaming material from the injection port of the first end cover;

[0059] Step 9: Install the access cover on the electrical room to complete the assembly.

[0060] However, when the electric water heater is assembled by the existing assembly method, the following problems will occur: first, the lifting ear of the inner tank is set at the second end of the inner tank. When hoisting, the second end of the inner tank faces upward, which is opposite to the assembly direction of the second end cover on the shell facing downward. Therefore, after the inner tank is hoisted to the pre-installed position, it is necessary to readjust the posture of the inner tank to make it consistent with the assembly direction of the shell and the second end cover. At the same time, the lifting ear is set at the end of the inner tank. In order to avoid interference with the installation of the lifting ear, it is necessary to flatten the lifting ear after the hoisting is completed to form an avoidance, which is relatively cumbersome.

[0061] Moreover, when the liner is placed on the second end cover, it is necessary to add a foam cushion layer to cushion and support the liner. Since the foam cushion layer is compressible and easily deformed, it cannot effectively ensure that the liner can be placed completely along the axial direction of the shell, but there will be a certain inclination, and it is also difficult to effectively control the height of the liner in the shell, so that the heights of the liner in the same batch in the shell are inconsistent, it is difficult to ensure the accuracy of the installation, the installation efficiency is low, and it is not convenient for the subsequent accurate and smooth installation of the rack assembly and the inlet and outlet water pipe assembly;

[0062] In addition, the injection port of the first end cover is opened at the center of the first end of the inner liner, where the gap is relatively narrow, which is easy to block and interfere with the injection during the injection process, resulting in low assembly efficiency.

[0063] In order to solve the above problems, the present application provides an electric water heater and an assembly method thereof, by changing the installation order of the first end cover and the second end cover, that is, adjusting the assembly direction of the electric water heater, and based on this, making corresponding improvements to the water heater structure, so as to simplify the structure and assembly method of the electric water heater and improve the assembly efficiency of the electric water heater.

[0064] The electric water heater and the assembly method thereof provided by the present application will be described in detail below in conjunction with the accompanying drawings.

[0065] Figure 1 A schematic diagram of the structure of the electric water heater provided in the embodiment of the present application; Figure 2 A schematic structural diagram of the electric water heater from another perspective provided in an embodiment of the present application.

[0066] In one aspect, the present application provides an electric water heater. Figure 1 and Figure 2As shown, the electric water heater provided in the present application includes a shell 100, an electrical chamber 130, a first end cover 110, a second end cover 120 and an inner tank 200, the shell 100 is sleeved on the inner tank 200 and fixedly connected to the inner tank 200, the electrical chamber 130 is connected to the first end cover 110; the first end cover 110 and the second end cover 120 are respectively covered on both ends of the shell 100, the first end cover 110 is abutted against the first end 210 of the inner tank 200, and the first end cover 110 has a filling port 111, the second end cover 120 is adjacent to the second end 220 of the inner tank 200, and the second end 220 is provided with a lifting ear 240.

[0067] It can be understood that the shell 100 is a hollow cylindrical structure with consistent radial dimensions, and its two ends are respectively used to connect with the first end cover 110 and the second end cover 120, and the radial dimension of the shell 100 is greater than the radial dimension of the inner tank 200, so that the shell 100 can accommodate the inner tank 200. By making the first end 210 of the inner tank 200 of the electric water heater abut against the first end cover 110, and fixing the inner tank 200 and the shell 100, the second end 220 of the inner tank 200 can be adjacent to the second end cover 120, and there is no need to set a foam cushion layer between the second end 220 of the inner tank 200 and the second end cover 120, and the structure is simpler and more compact.

[0068] Compared with the existing electric water heater structure, since the first end cover 110 can directly and stably abut against the first end 210 of the inner tank 200, after the inner tank 200 is hoisted to the shell 100 through the lifting ear 240 located at the second end 220 of the inner tank 200, the relative position of the inner tank 200 and the shell 100 is determined accordingly, and there is no need to adjust the posture of the inner tank 200 during the hoisting process. Then, the inner tank 200 and the shell 100 can be directly fixed based on this reference to limit the relative displacement between the inner tank 200 and the shell 100, avoiding the rigid abutment between the second end 220 of the inner tank 200 and the second end cover 120, and there is no need to set a foam cushion layer between the two for buffering, so that the structure of the electric water heater is further simplified for easy installation, and a larger foaming space is reserved, so that the filling of the foaming material is smoother and more efficient. To this end, it is necessary to ensure that the inner tank 200 is stably and reliably connected to the shell 100 during the installation process, and the positioning of the abutment between the first end 210 of the inner tank 200 and the first end cover 110 is accurate.

[0069] Specifically, Figure 1 As shown, the first end cover 110 is integrally formed with the electrical chamber 130 , and the first end cover 110 has at least two positioning members 112 circumferentially spaced around the first end 210 , the first end 210 matches and abuts against the positioning members 112 ; there is a set interval between the second end cover 120 and the second end 220 .

[0070] It can be understood that by integrally forming the first end cover 110 and the electrical chamber 130 , the structure of the electric water heater can be further simplified, making the structure of the electric water heater simple and compact.

[0071] At least two positioning members 112 are arranged on the first end cover 110 and are distributed circumferentially around the first end 210 of the liner 200, so that the first end 210 can contact and abut against the positioning members 112, so as to achieve the positioning and abutment between the first end 210 and the first end cover 110, and thereby ensure that the posture of the liner 200 in the shell 100 is accurate and stable, and will not tilt relative to the axial direction of the shell 100. Specifically, the positioning member 112 is a plurality of ribs arranged circumferentially around the first end 210 and matching with the first end 210, and has a high support stability, does not interfere with the filling of the foam material, and has a simple structure and is easy to process and shape. In other embodiments, the positioning member 112 can also be arranged as a curved surface structure that fits the shape of the first end 210, and the present application does not limit this.

[0072] In order to further improve the sealing performance between the first end 210 and the first end cover 110 and the positioning member 112, a sealing ring 150 is provided between the first end cover 110 and the first end 210, which may be a sponge sealing ring to prevent the foaming material from leaking.

[0073] It should also be noted that when the first end cover 110 and the second end cover 120 are respectively connected to the shell 100, vertical edges are provided on the first end cover 110 and the second end cover 120, and the vertical edges are circumferentially fitted with the inner surface of the shell 100 to ensure reliable sealing of the connection and avoid leakage of the foaming material.

[0074] Furthermore, since the inner tank 200 has been positioned and abutted against the first end cover 110, and the inner tank 200 is fixedly connected to the shell 100, there is no need to set a foam pad between the second end 220 of the inner tank 200 and the second end cover 120, thereby simplifying the structure and installation process of the electric water heater, and leaving more filling space for the foaming material, making the filling efficiency of the foaming material higher, and improving the thermal insulation performance of the electric water heater.

[0075] In some embodiments, Figure 1 As shown, the liner 200 includes two sub-liners 230 arranged side by side, the two sub-liners 230 are connected, and the two sub-liners 230 are connected by a lifting ear 240, and the lifting ear 240 is located between the first end 210 and the second end 220 and close to the second end 220.

[0076] It can be understood that the two ears 240 originally arranged on the ends of the two sub-inner tanks 230 are merged into one, and it is arranged between the two sub-inner tanks 230 on the side close to the second end 220, so that the ear 240 is located between the first end 210 and the second end 220 of the inner tank 200. The two sub-inner tanks 230 are connected by one ear 240, which further simplifies the structure of the electric water heater.

[0077] Moreover, only one lifting lug 240 is provided, which is convenient for lifting operation and simplifies the operation steps. Meanwhile, the apex of the lifting lug 240 does not protrude from the second end 220, which can effectively prevent the lifting lug 240 from pushing the second end cover 120, thereby interfering with the installation of the second end cover 120.

[0078] Among them, Figure 1 and Figure 2 As shown, it also includes an inlet and outlet water pipe assembly 300 and a bracket assembly 400. The inlet and outlet water pipe assembly 300 includes an inlet and outlet water pipe 310 and an integrally injection-molded threaded connector 320. The inlet and outlet water pipe 310 is connected to the threaded connector 320. The shell 100 has a mounting hole 140, and a positioning sleeve 141 is provided on the mounting hole 140. The inlet and outlet water pipe 310 coaxially passes through the positioning sleeve 141 and is inserted into the inner tank 200. The threaded connector 320 is used to communicate with the water pipeline. The inner tank 200 and the shell 100 are both fixedly connected to the bracket assembly 400.

[0079] It should be noted that the water inlet and outlet pipes 310 may specifically include a water inlet pipe 311 and a water outlet pipe 312 , and the water inlet pipe 311 and the water outlet pipe 312 are respectively connected with threaded connectors 320 , so that the water inlet and outlet pipes 310 are connected to the water pipeline through the threaded connectors 320 .

[0080] In this, in order to ensure that the water inlet and outlet pipes 310 can coaxially pass through the mounting hole 140 on the housing 100 and stably insert into the inner tank 200, a positioning sleeve 141 is provided on the mounting hole 140. Specifically, the positioning sleeve 141 is snap-fitted with the mounting hole 140, and then the water inlet pipe 311 and the water outlet pipe 312 pass through the positioning sleeve 141 respectively to realize the coaxial installation of the water inlet and outlet pipes 310 and the mounting hole 140, and the threaded connector 320 is threadedly connected with the positioning sleeve 141 to ensure the stable and reliable installation of the water inlet and outlet pipe assembly 300.

[0081] Moreover, compared with the existing threaded connectors which are formed by insert injection molding of plastic and metal screws, the threaded connector 320 of this embodiment is formed by integral injection molding of hard plastic, which can ensure the strength of the threaded connector 320 and meet the actual use requirements. Moreover, the threaded connector 320 is formed by integral injection molding, which can effectively shorten the length of the threaded connector 320 along the axial direction of the inlet and outlet water pipes 310 and reduce the volume of the threaded connector 320 exposed outside the housing 100, thereby facilitating the hidden installation of the inlet and outlet water pipe assembly 300, making the structure of the electric water heater more compact and improving the user's visual experience.

[0082] The rack assembly 400 specifically includes an inner liner bracket 410, an outer wall bracket 420, and a cushion block 430. The inner liner bracket 410 is located inside the shell 100 and is fixedly connected to the inner liner 200 by bolts or welding, while the outer wall bracket 420 and the cushion block 430 are located outside the shell 100 and are respectively connected to the inner liner bracket 410 by fasteners, so that the side wall of the shell 100 is clamped between the inner liner bracket 410 and the outer wall bracket 420 or the cushion block 430, thereby realizing a fixed connection between the inner liner 200 and the shell 100. In this embodiment, the fasteners may be bolts and internal thread blocks, and in other embodiments, they may also be replaced by other conventional fasteners, which is not limited in this application. The external wall bracket 420 is used to connect to the wall so as to hang the electric water heater on the wall, and the heat-insulated pad 430 is located below the external wall bracket 420 to support the electric water heater and prevent the lower part of the electric water heater from tilting toward the wall, thereby ensuring stable and reliable installation and preventing heat transfer from the inner tank 200.

[0083] In some embodiments, Figure 2 As shown, the first end cover 110 has at least two injection ports 111 , and the injection ports 111 are located on one side of the first end cover 110 close to the edge thereof, so that the injection ports 111 avoid the first end 210 .

[0084] It is understandable that the original injection port 111 is set at the center position between the two sub-liners 230 on the first end cover 110, and the space there is small, which is easy to be blocked during the injection process. For this, an additional injection port 111 can be provided, and the two injection ports 111 are symmetrically offset toward the edge side of the first end cover 110, so that the injection port 111 avoids the first end 210 of the liner 200 and directly aligns with the gap between the liner 200 and the shell 100. This is a position where the gap is relatively more abundant, whether in terms of the axial or radial direction of the liner 200 and the shell 100, so that the injection efficiency can be improved, the foaming material can be avoided from being blocked, and the foaming material can be filled more fully, thereby improving the thermal insulation performance of the electric water heater.

[0085] Figure 3 A schematic diagram of a flow chart of an electric water heater assembly method provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of the assembled shell and the first end cover in the electric water heater provided in the embodiment of the present application; Figure 5 A schematic diagram of the structure of assembling an inner tank into a shell of an electric water heater provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of assembling a positioning sleeve onto a shell in an electric water heater provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of assembling the water inlet and outlet pipe components to the shell and the inner tank of the electric water heater provided in the embodiment of the present application; Figure 8 A schematic diagram of the structure of assembling the second end cover onto the shell of the electric water heater provided in an embodiment of the present application.

[0086] On the other hand, the present application also provides an electric water heater assembly method for assembling the above electric water heater. Figure 3 As shown, the electric water heater assembly method includes the following steps:

[0087] S101 : Install the first end cover 110 and the electrical chamber 130 at the lower portion of the housing 100 .

[0088] The first end cover 110 and the electrical chamber 130 are integrally formed at the bottom of the housing 100. In the integrally formed first end cover 110 and the electrical chamber 130, a positioning member 112 is provided on the side of the first end cover 110 facing the housing 100, and the vertical side of the first end cover 110 is sealed and connected to the housing 100, forming a Figure 4 The structure shown.

[0089] It can be understood that directly installing the integrally formed first end cover 110 and the electrical chamber 130 can further simplify the structure of the electric water heater, thereby reducing the number of installation steps and improving assembly efficiency.

[0090] S102 : The inner liner 200 is hoisted into the shell 100 through the lifting ear located at the second end of the inner liner, and the first end 210 of the inner liner 200 faces the first end cover 110 and abuts against the first end cover 110 .

[0091] Specifically, the inner liner 200 is lifted from the lifting ear 240 at the second end 220 of the inner liner 200, and the first end 210 of the inner liner 200 moves toward at least two positioning members 112 on the first end cover 110 until the first end 210 is positioned and abutted against the positioning members 112, so that the extension direction of the inner liner 200 is consistent with the extension direction of the shell 100, forming a Figure 5 The structure shown in FIG. 1 is shown in FIG. 1 . The positioning members 112 are arranged at intervals around the circumference of the first end 210 , and the positioning members 112 match the first end 210 . In addition, a sealing ring 150 is arranged between the first end 210 and the first end cover 110 to prevent the foaming material from leaking in the later stage.

[0092] It is understandable that at least two positioning members 112 are arranged on the first end cover 110 and are distributed circumferentially around the first end 210 of the inner liner 200, and the positioning members 112 are matched with the first end 210, so that when the inner liner 200 is hoisted into the shell 100, the first end 210 of the inner liner 200 can contact and abut against the positioning members 112 by itself. In this way, the inner liner 200 is ensured to be accurately and stably positioned in the shell 100, and will not be tilted relative to the axial direction of the shell 100, and there is no need to repeatedly adjust the posture of the inner liner 200 after the hoisting is completed, so that the assembly operation is simplified, the operation redundancy is avoided, and the assembly efficiency is improved.

[0093] S103: Fixing and connecting the inner liner 200 and the shell 100.

[0094] like Figure 2 , Figure 6 and Figure 7 As shown, a positioning sleeve 141 is installed on the mounting hole 140 of the shell 100 to block the mounting hole 140 through the positioning sleeve 141. The bracket assembly 400 is installed, and the inner liner 200 and the shell 100 are fixedly connected through the bracket assembly 400. Specifically, the bolts are passed through the shell 100 after passing through the inner liner bracket 410, so that the external wall bracket 420 and the cushion block 430 are fixed on the inner liner bracket 410. The inlet and outlet pipe assembly 300 is installed, and the inlet pipe 311 and the outlet pipe 312 are respectively inserted into the inner liner 200 and communicated with the integral injection-molded threaded connector 320. Then the threaded connector 320 is connected to the positioning sleeve 141 to ensure the coaxial installation of the inlet and outlet pipes 310 and the mounting hole 140 through the positioning sleeve 141.

[0095] It is understandable that the fixed connection between the inner tank 200 and the shell 100 is achieved through the bracket assembly 400, which not only completes the effective installation of the bracket assembly 400, but also avoids the need to set an additional connection structure in this step to fix the inner tank 200 and the shell 100, making the electric water heater structure simpler and more compact, with fewer installation steps and higher installation efficiency. Among them, the positioning sleeve 141 is provided on the installation hole 140 to ensure that the inlet and outlet pipes 310 can coaxially pass through the installation hole 140 on the shell 100 and be stably inserted in the inner tank 200.

[0096] Furthermore, since the shell 100 and the inner tank 200 are fixedly connected via the bracket assembly 400, there is no need to worry about the inner tank 200 being displaced and falling off during the subsequent flipping of the electric water heater, thereby effectively ensuring the stability of the overall structure.

[0097] S104 : Install the second end cover 120 above the shell 100 , so that the second end cover 120 is adjacent to the second end 220 of the liner 200 .

[0098] like Figure 8As shown, the second end cover 120 is installed above the shell 100 , and a set interval is left between the second end cover 120 and the second end 220 of the liner 200 , so that the vertical edge of the second end cover 120 is sealed and connected to the shell 100 .

[0099] It is understandable that the set interval here is actually the installation space of the original foam cushion layer. Since the present assembly method omits the setting of the foam cushion layer, a set interval can be reserved between the second end 220 and the second end cover 120. The set interval can be filled with a foam material to increase the filling rate of the foam material, thereby making the thermal insulation performance of the electric water heater better. In other embodiments, the axial length of the inner tank 200 can also be extended accordingly, so that the inner tank 200 occupies the reserved set interval, fully utilizes the internal space of the shell 100, and increases the capacity of the inner tank 200, and the present application does not limit this.

[0100] S105 : turning over the shell 100 so that the first end cover 110 faces upward, and injecting foaming material through the injection port 111 of the first end cover 110 to fill the gap between the liner 200 and the shell 100 .

[0101] Among them, Figure 1 and Figure 2 As shown, after the overall installation is completed, the entire electric water heater is turned 180° so that the first end cover 110 faces upward, and the foaming material is injected through the two injection ports 111 on the first end cover 110. After the foaming is completed, the inspection cover 131 is installed on the first end cover 110 to complete the installation.

[0102] It is understandable that the first end cap 110 is installed from the first end cap 110. After the first end cap 110 is connected to the shell 100, the first end cap 110 is placed downward, so that the orientation of the first end cap 110 is consistent with the orientation of the first end 210 when the inner liner 200 is hoisted. Therefore, when the inner liner 200 is hoisted from the second end 220 of the inner liner 200, there is no need to adjust the posture and installation direction of the inner liner 200 again, and the inner liner 200 can be directly installed into the shell 100, which can effectively reduce the operation during assembly, simplify the assembly process, and improve assembly efficiency.

[0103] Furthermore, since the first end 210 of the inner tank 200 is in contact with the first end cover 110, the second end cover 120 can be directly installed on the shell 100 after the inner tank 200 is fixedly connected to the shell 100, and there is no need to set a foam cushion between the second end 220 of the inner tank 200 and the second end cover 120, which further simplifies the assembly process and makes the installation process compact. After that, the electric water heater can be directly turned over as a whole to perform the injection and foaming operation, and the overall turning over is easier to operate.

[0104] In summary, the electric water heater assembly method provided in the embodiment of the present application can simplify the structure and assembly method of the electric water heater and improve the assembly efficiency of the electric water heater.

[0105] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric water heater, characterized in that: It comprises a shell, an electrical chamber, a first end cover, a second end cover and an inner liner, wherein the shell is sleeved on the inner liner and fixedly connected to the inner liner, and the electrical chamber is connected to the first end cover; The first end cover and the second end cover are respectively covered at both ends of the shell, the first end cover abuts against the first end of the inner liner, and the first end cover has a material injection port, the second end cover is adjacent to the second end of the inner liner, and the second end is provided with a lifting ear.

2. The electric water heater according to claim 1, characterized in that: The first end cover is integrally formed with the electrical chamber, and the first end cover has at least two positioning members spaced apart from each other around the first end, and the first end matches and abuts against the positioning members; A set interval is provided between the second end cover and the second end.

3. The electric water heater according to claim 1, characterized in that: The inner container includes two sub-inner containers arranged side by side, the two sub-inner containers are communicated, and the two sub-inner containers are connected by the lifting ear, and the lifting ear is located between the first end and the second end and close to the second end.

4. The electric water heater according to claim 1, characterized in that: It also includes an inlet and outlet water pipe assembly and a hanger assembly, wherein the inlet and outlet water pipe assembly includes an inlet and outlet water pipe and an integrally injection-molded threaded connector, and the inlet and outlet water pipe is connected to the threaded connector; The shell has a mounting hole, a positioning sleeve is provided on the mounting hole, the inlet and outlet water pipes pass through the positioning sleeve and are coaxially inserted in the inner tank, and the threaded connector is used to communicate with the water pipeline; The inner container and the shell are both fixedly connected to the rack assembly.

5. The electric water heater according to claim 1, characterized in that: The first end cover is provided with at least two injection ports, and the injection ports are located on one side of the first end cover close to the edge thereof, so that the injection ports avoid the first end.

6. An electric water heater assembly method, used for assembling the electric water heater according to any one of claims 1 to 5, characterized in that: The following steps are involved: Installing a first end cover and an electrical chamber at the lower part of the shell; The inner liner is hoisted into the shell through a hoisting ear at the second end of the inner liner, and the first end of the inner liner faces the first end cover and abuts against the first end cover; Fixedly connecting the inner tank and the shell; Installing a second end cover on the upper side of the housing so that the second end cover is adjacent to the second end of the inner container; The shell is turned over so that the first end cover faces upward, and a foaming material is injected through the injection port of the first end cover to fill the gap between the inner container and the shell.

7. The electric water heater assembly method according to claim 6, characterized in that: The first end cover and the electrical chamber are installed at the lower part of the shell, including: The first end cover and the electrical chamber are integrally mounted at the lower portion of the housing.

8. The electric water heater assembly method according to claim 6, characterized in that: The first end of the inner container faces the first end cover and abuts against the first end cover, comprising: The first end of the inner liner moves toward at least two positioning members on the first end cover until the first end is positioned and abutted against the positioning members, so that the extension direction of the inner liner is consistent with the extension direction of the shell, wherein the positioning members are arranged at circumferential intervals around the first end, and the positioning members match the first end.

9. The electric water heater assembly method according to claim 6, characterized in that: The fixed connection between the inner container and the shell includes: A hanger assembly is installed on the shell and the inner liner bracket, and a positioning sleeve is installed on the mounting hole of the shell, and then an inlet and outlet water pipe assembly is installed in the positioning sleeve, and the shell and the inner liner are fixedly connected through the hanger assembly.

10. The electric water heater assembly method according to claim 6, characterized in that: The step of installing the second end cover above the housing comprises: A set interval is left between the second end and the second end cap.

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