Electric water heater and method of assembling the same

Abstract

The application 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 shell is sleeved on the inner container and fixedly connected with the inner container. The electrical chamber and the first end cover are connected. The first end cover and the second end cover are respectively arranged at two ends of the shell. The first end cover abuts against a first end of the inner container. The first end cover is provided with a pouring port. The second end cover is adjacent to a second end of the inner container. The second end is provided with a lifting lug. The first end of the inner container of the electric water heater abuts against the first end cover, and the inner container and the shell are fixedly connected. The second end of the inner container is adjacent to the second end cover. A foam cushion layer is not arranged between the second end of the inner container and the second end cover. The structure is more simple and compact. The mounting process is reduced, and the assembling efficiency of the electric water heater is improved.

Description

Technical Field

[0001] This application belongs to the field of water heater technology, and in particular relates to an electric water heater and its assembly method. Background Technology

[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 friendliness, easy installation and not easily affected by weather.

[0003] Currently, when assembling electric water heaters, the installation generally starts from the end cap (second end cap) on the side away from the electrical compartment. After the second end cap is connected to the shell, a foam pad is placed, the inner tank is hoisted to the vicinity of the shell, the inner tank is flipped and its position is adjusted, and the inner tank is placed on the foam pad of the second end cap. Then, the inlet and outlet water pipe assemblies and the bracket assembly are installed. Next, the end cap (first end cap) and the electrical compartment are installed. Finally, foaming material is injected through the injection port on the first end cap to complete the installation.

[0004] However, the complex structure and assembly methods of existing electric water heaters result in low assembly efficiency. Summary of the Invention

[0005] This application provides an electric water heater and its assembly method to solve the problem that the existing electric water heaters have complex structures and assembly methods, resulting in low assembly efficiency.

[0006] On the one hand, this application provides an electric water heater, including 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 cap and the second end cap are respectively installed on both ends of the shell. The first end cap abuts against the first end of the inner liner and has a filling port. The second end cap is adjacent to the second end of the inner liner and has a lifting lug.

[0008] In one possible implementation, the electric water heater provided in this application has a first end cover integrally formed with the electrical chamber, and the first end cover has at least two positioning members arranged circumferentially spaced around the first end, the first end matching and abutting with the positioning members;

[0009] There is a set interval between the second end cap and the second end.

[0010] In one possible implementation, the electric water heater provided in this application includes two sub-inner tanks arranged side by side, which are connected and connected by a hanging lug located between the first end and the second end and close to the second end.

[0011] In one possible implementation, the electric water heater provided in this application further includes an inlet and outlet water pipe assembly and a bracket assembly. The inlet and outlet water pipe assembly includes inlet and outlet water pipes and an integrally injection-molded threaded connector. The inlet and outlet water pipes are connected to the threaded connector.

[0012] The shell has mounting holes with positioning sleeves. Inlet and outlet water pipes pass through the positioning sleeves and are coaxially inserted into the inner tank. Threaded connectors are used to connect with water pipes.

[0013] Both the inner liner and the outer shell are fixedly connected to the bracket assembly.

[0014] In one possible implementation, the electric water heater provided in this application has at least two filling ports on the first end cap, with the filling ports located on the side of the first end cap near its edge, so that the filling ports avoid the first end cap.

[0015] On the other hand, this application also provides an electric water heater assembly method for assembling any of the above-mentioned electric water heaters, comprising the following steps:

[0016] The first end cover and electrical compartment are installed at the lower part of the housing;

[0017] The inner liner is hoisted into the shell by the lug located at the second end of the inner liner, with the first end of the inner liner facing the first end cover and abutting against the first end cover;

[0018] The inner liner and the outer shell are fixedly connected;

[0019] Install the second end cap above the housing so that the second end cap is adjacent to the second end of the inner liner;

[0020] Flip the shell so that the first end cap faces upward, and inject foaming material through the injection port of the first end cap to fill the gap between the inner liner and the shell.

[0021] In one possible implementation, the electric water heater assembly method provided in this application includes installing a first end cover and an electrical compartment at the lower part of the casing, comprising:

[0022] An integrally molded first end cap and electrical chamber are installed at the lower part of the housing.

[0023] In one possible implementation, the electric water heater assembly method provided in this application, wherein the first end of the inner tank faces the first end cover and abuts against the first end cover, includes:

[0024] The first end of the inner liner moves toward at least two positioning members on the first end cap until the first end is positioned and abuts 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 circumferentially spaced around the first end and the positioning members match the first end.

[0025] In one possible implementation, the electric water heater assembly method provided in this application, which fixes the inner tank and the outer shell, includes:

[0026] Install the bracket assembly on the shell and inner tank support, install the positioning sleeve on the mounting hole of the shell, and then install the inlet and outlet water pipe assembly inside the positioning sleeve. The shell and inner tank are fixedly connected by the bracket assembly.

[0027] In one possible implementation, the electric water heater assembly method provided in this application, which involves installing the second end cap above the housing, includes:

[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 in this application involve abutting the first end of the inner tank against the first end cap, thus fixing the inner tank and the shell together. This allows the second end of the inner tank to be adjacent to the second end cap, eliminating the need for a foam pad between the second end of the inner tank and the second end cap, resulting in a simpler and more compact structure. Compared to existing electric water heater structures, since the first end cap can directly and stably abut against the first end of the inner tank, the relative position of the inner tank and the shell is determined after the inner tank is hoisted to the shell using the lifting lug located at the second end of the inner tank. No adjustment of the inner tank's posture is required during hoisting. This allows for direct fixation of the inner tank and shell based on this reference, limiting relative displacement between them and avoiding rigid contact between the second end of the inner tank and the second end cap. This eliminates the need for a foam pad for cushioning, further simplifying the electric water heater structure. This simplifies the structure and assembly method of the electric water heater, improving assembly efficiency. Attached Figure Description

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

[0031] The preferred embodiment of this application will now be described with reference to the accompanying drawings. The drawings are as follows:

[0032] Figure 1 This is a schematic diagram of the structure of an electric water heater provided in an embodiment of this application;

[0033] Figure 2 This is a structural schematic diagram of an electric water heater from another perspective, provided in an embodiment of this application.

[0034] Figure 3 This is a schematic flowchart illustrating the electric water heater assembly method provided in an embodiment of this application.

[0035] Figure 4 This is a schematic diagram of the structure of the electric water heater with the housing and the first end cap provided in the embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the structure of an electric water heater in which the inner tank is assembled into the shell, as provided in an embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the structure of an electric water heater in an embodiment of this application, showing the positioning sleeve being assembled onto the shell.

[0038] Figure 7 This is a schematic diagram of the structure of the electric water heater provided in the embodiment of this application, showing the assembly of the inlet and outlet water pipes onto the shell and inner tank.

[0039] Figure 8 This is a schematic diagram of the structure of an electric water heater in an embodiment of this application, showing the assembly of the second end cap onto the housing.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100 - Housing; 110 - First end cap; 111 - Injection port; 112 - Positioning element; 120 - Second end cap; 130 - Electrical compartment; 131 - Inspection cover; 140 - Mounting hole; 141 - Positioning sleeve; 150 - Sealing ring;

[0042] 200 - Inner liner; 210 - First end; 220 - Second end; 230 - Sub-inner liner; 240 - Hanging lug;

[0043] 300 - Inlet / outlet water pipe assembly; 310 - Inlet / outlet water pipe; 311 - Inlet water pipe; 312 - Outlet water pipe; 320 - Threaded connector;

[0044] 400 - Hanger assembly; 410 - Inner liner bracket; 420 - External wall hanger; 430 - Spacer block.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

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

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

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

[0050] The assembly method for this electric water heater is as follows:

[0051] Step 1: First, use the lifting lugs to lift the inner liner to the pre-installation position, lower the inner liner and bend and flatten the two lifting lugs so that the lifting lugs do not protrude from the second end of the inner liner to avoid the lifting lugs interfering with the subsequent installation. The lifting lugs are set at the second end of the inner liner, and each of the two sub-inner liners of the inner liner has a lifting lug installed.

[0052] Step 2: Install the second end cap to the lower part of the housing and make the vertical edge of the second end cap seal against the housing;

[0053] Step 3: Lay a foam pad on the second end cap to support the inner liner and provide cushioning and insulation.

[0054] Step 4: Turn the inner liner over and adjust its position, then place the inner liner into the shell, and make the second end of the inner liner match and abut against the foam padding layer of the second end cap.

[0055] Step 5: Install the positioning sleeve on the mounting hole of the shell, and install the inlet and outlet water pipe assembly on the positioning sleeve. Then install the external wall bracket assembly to fix the shell and the inner tank through the inlet and outlet water pipe assembly and the external wall bracket assembly. During this process, the relative position and height of the inner tank and the shell need to be adjusted.

[0056] Step 6: Install the first end cap onto the top of the housing, ensuring a sealed connection between the vertical edge of the first end cap and the housing;

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

[0058] Step 8: Inject foaming material through the injection port of the first end cap;

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

[0060] However, when assembling an electric water heater using the existing assembly method, the following problems may occur: First, the lifting lugs of the inner tank are located at the second end of the inner tank. During hoisting, the second end of the inner tank faces upward, which is opposite to the assembly direction of the second end cap on the shell facing downward. Therefore, after hoisting the inner tank to the pre-installation position, it is necessary to readjust the posture of the inner tank so that it is consistent with the assembly direction of the shell and the second end cap. At the same time, the lifting lugs are located at the end of the inner tank. In order to avoid the lifting lugs interfering with the installation, it is also necessary to flatten the lifting lugs after hoisting to avoid interference. The operation is relatively cumbersome.

[0061] Furthermore, starting from the second end cap, when placing the inner liner on the second end cap, a foam padding layer needs to be added to cushion and support the inner liner. Since the foam padding layer is compressible and easily deformable, it cannot effectively ensure that the inner liner can be placed completely along the axial direction of the shell, but will have a certain tilt. It is also difficult to effectively control the height of the inner liner in the shell, resulting in inconsistent heights of inner liners in the same batch. This makes it difficult to ensure the accuracy of installation, resulting in low installation efficiency and making it inconvenient for the accurate and smooth installation of subsequent bracket components and inlet / outlet water pipe components.

[0062] In addition, the injection port of the first end cap is located at the center of the first end of the inner liner. The gap at this location is relatively narrow, which can easily cause blockage and interference during the injection process, resulting in low assembly efficiency.

[0063] To address the aforementioned problems, this application provides an electric water heater and its assembly method. By changing the installation order of the first end cap and the second end cap, i.e. adjusting the assembly direction of the electric water heater, and based on this, the structure of the water heater is improved accordingly, thereby simplifying the structure and assembly method of the electric water heater and improving the assembly efficiency of the electric water heater.

[0064] The electric water heater and its assembly method provided in this application will be described in detail below with reference to the accompanying drawings.

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

[0066] On one hand, embodiments of this application provide an electric water heater. For example... Figure 1 and Figure 2As shown, the electric water heater provided in this application includes a shell 100, an electrical chamber 130, a first end cap 110, a second end cap 120, and an inner tank 200. The shell 100 is fitted onto the inner tank 200 and fixedly connected to it. The electrical chamber 130 is connected to the first end cap 110. The first end cap 110 and the second end cap 120 are respectively covered at both ends of the shell 100. The first end cap 110 abuts against the first end 210 of the inner tank 200 and has a filling port 111. The second end cap 120 is adjacent to the second end 220 of the inner tank 200 and has a lifting lug 240.

[0067] It is understood that the shell 100 is a hollow cylindrical structure with uniform radial dimensions. Its two ends are used to connect to the first end cap 110 and the second end cap 120, respectively. The radial dimension of the shell 100 is larger than that 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 abut against the first end cap 110 and fixing the inner tank 200 and the shell 100 together, the second end 220 of the inner tank 200 can be adjacent to the second end cap 120, and there is no need to set a foam pad between the second end 220 of the inner tank 200 and the second end cap 120, making the structure simpler and more compact.

[0068] Compared to existing electric water heater structures, since the first end cap 110 can directly and stably abut against the first end 210 of the inner tank 200, the relative positions of the inner tank 200 and the shell 100 are determined after the inner tank 200 is hoisted to the shell 100 via the lifting lug 240 located at the second end 220 of the inner tank 200. No adjustment of the inner tank 200's posture is required during hoisting. This allows for direct fixation of the inner tank 200 and the shell 100 based on this, limiting relative displacement between them and avoiding rigid contact between the second end 220 of the inner tank 200 and the second end cap 120. Therefore, there is no need to place a foam pad between them for cushioning, further simplifying the electric water heater structure for easier installation and providing more space for foaming, allowing for smoother and more efficient filling of the foam material. Therefore, it is necessary to ensure the stable and reliable connection between the inner tank 200 and the shell 100 during installation, as well as the accurate positioning of the abutment between the first end 210 of the inner tank 200 and the first end cap 110.

[0069] Specifically, such as 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 arranged circumferentially around the first end 210, the first end 210 matches and abuts with the positioning members 112; the second end cover 120 and the second end 220 have a set interval.

[0070] It is understandable that by integrally molding the first end cap 110 with 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 provided on the first end cap 110, circumferentially distributed around the first end 210 of the inner liner 200. These members allow the first end 210 to contact and abut against the positioning members 112, achieving positioning and abutment between the first end 210 and the first end cap 110. This ensures the accurate and stable posture of the inner liner 200 within the shell 100, preventing tilting relative to the axial direction of the shell 100. Specifically, the positioning members 112 are multiple ribs circumferentially arranged around the first end 210 and matching the first end 210. They provide high stability, do not interfere with the filling of the foam material, and have a simple structure that is easy to process and mold. In other embodiments, the positioning members 112 can also be configured as curved surfaces that conform to the shape of the first end 210; this application does not limit this.

[0072] Furthermore, to further improve the sealing performance of the first end 210 abutting against the first end cap 110 and the positioning member 112, a sealing ring 150 is provided between the first end cap 110 and the first end 210. Specifically, it can be a sponge sealing ring, in order to prevent the foam material from leaking out.

[0073] It should also be noted that when the first end cap 110 and the second end cap 120 are connected to the housing 100, each end cap 110 and the second end cap 120 is provided with a vertical edge, which is circumferentially fitted to the inner surface of the housing 100 to ensure reliable sealing of the connection and prevent leakage of foam material.

[0074] Furthermore, since the inner tank 200 is positioned and abuts against the first end cap 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 cap 120. This simplifies the structure and installation process of the electric water heater, and leaves more space for the foaming material to fill, making the filling efficiency of the foaming material higher and improving the heat preservation performance of the electric water heater.

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

[0076] Understandably, the two original lugs 240, which were respectively located at the ends of the two sub-inner tanks 230, are combined into one and placed between the two sub-inner tanks 230 on the side near the second end 220, so that the lug 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 lug 240, which further simplifies the structure of the electric water heater.

[0077] Furthermore, the use of only one lifting lug 240 facilitates hoisting operations and simplifies the procedures. Additionally, the fact that the apex of the lifting lug 240 does not protrude beyond the second end 220 effectively prevents the lifting lug 240 from pushing against the second end cover 120 and thus interfering with its installation.

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

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

[0080] To ensure that the inlet and outlet water pipes 310 can pass coaxially through the mounting hole 140 on the housing 100 and be stably inserted into the inner liner 200, a positioning sleeve 141 is provided on the mounting hole 140. Specifically, the positioning sleeve 141 engages with the mounting hole 140, and then the inlet water pipe 311 and the outlet water pipe 312 pass through the positioning sleeve 141 respectively to achieve coaxial installation of the inlet and outlet water pipes 310 and the mounting hole 140. The threaded connector 320 is threadedly connected to the positioning sleeve 141 to ensure the stable and reliable installation of the inlet and outlet water pipe assembly 300.

[0081] Furthermore, compared to existing threaded connectors that are injection molded from plastic inserts with metal screws, the threaded connector 320 in this embodiment is integrally injection molded from rigid plastic. This ensures the strength of the threaded connector 320 and meets practical usage requirements. Integral injection molding of the threaded connector 320 effectively shortens its axial length along the inlet / outlet water pipe 310, reducing the volume of the threaded connector 320 exposed outside the housing 100. This facilitates concealed installation of the inlet / outlet water pipe assembly 300, making the electric water heater structure more compact and improving the user's aesthetic experience.

[0082] The mounting bracket assembly 400 specifically includes an inner liner support 410, an outer wall mount 420, and a pad 430. The inner liner support 410 is located inside the housing 100 and is fixedly connected to the inner liner 200 by bolts or welding. The outer wall mount 420 and the pad 430 are located outside the housing 100 and are respectively connected to the inner liner support 410 by fasteners, thereby clamping the side wall of the housing 100 between the inner liner support 410 and the outer wall mount 420 or the pad 430, thus achieving a fixed connection between the inner liner 200 and the housing 100. In this embodiment, the fasteners can be bolts and internally threaded blocks; in other embodiments, they can be replaced with other conventional fasteners, and this application does not impose any limitations on this. The external wall bracket 420 is used to connect to the wall to hang the electric water heater on the wall, while the heat-insulated pad 430 is located below the external wall bracket 420 to support the electric water heater, prevent the lower part of the electric water heater from tilting towards the wall, ensure stable and reliable installation, and prevent heat transfer from the inner tank 200.

[0083] In some embodiments, such as Figure 2 As shown, the first end cap 110 has at least two injection ports 111, which are located on the side of the first end cap 110 near its edge, so that the injection ports 111 avoid the first end 210.

[0084] Understandably, the original filling port 111 is located at the center between the two inner tanks 230 on the first end cap 110. This space is narrow and prone to blockage during filling. To address this, an additional filling port 111 can be added, and the two filling ports 111 can be symmetrically offset towards the edge of the first end cap 110. This allows the filling port 111 to avoid the first end 210 of the inner tank 200 and directly align with the gap between the inner tank 200 and the shell 100. This gap is more spacious both axially and radially between the inner tank 200 and the shell 100, thus improving filling efficiency, preventing foam material blockage, and ensuring more complete filling of the foam material, thereby improving the thermal insulation performance of the electric water heater.

[0085] Figure 3 This is a schematic flowchart illustrating the electric water heater assembly method provided in an embodiment of this application. Figure 4 This is a schematic diagram of the structure of the electric water heater with the housing and the first end cap provided in the embodiment of this application; Figure 5 This is a schematic diagram of the structure of an electric water heater in which the inner tank is assembled into the shell, as provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of an electric water heater in an embodiment of this application, showing the positioning sleeve being assembled onto the shell. Figure 7 This is a schematic diagram of the structure of the electric water heater provided in the embodiment of this application, showing the assembly of the inlet and outlet water pipes onto the shell and inner tank. Figure 8 This is a schematic diagram of the structure of an electric water heater in an embodiment of this application, showing the assembly of the second end cap onto the housing.

[0086] On the other hand, this application also provides an electric water heater assembly method for assembling the aforementioned electric water heater. For example... 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 on the lower part of the housing 100.

[0088] An integrally formed first end cap 110 and an electrical chamber 130 are installed on the lower part of the housing 100. In the integrally formed first end cap 110 and electrical chamber 130, a positioning element 112 is provided on the side of the first end cap 110 facing the housing 100, and the vertical edge of the first end cap 110 is sealed to the housing 100, forming a shape as shown in the image. Figure 4 The structure shown.

[0089] Understandably, directly installing the one-piece molded first end cap 110 and electrical compartment 130 can further simplify the structure of the electric water heater, thereby reducing installation steps and improving assembly efficiency.

[0090] S102: The inner liner 200 is hoisted into the shell 100 by the lug located at the second end of the inner liner. The first end 210 of the inner liner 200 faces the first end cap 110 and abuts against the first end cap 110.

[0091] Specifically, the inner liner 200 is lifted from the lug 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 cap 110 until the first end 210 is positioned and abuts 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 shape as shown in the figure. Figure 5 The structure shown is as follows. Positioning members 112 are spaced circumferentially around the first end 210, and the positioning members 112 match the first end 210. Furthermore, a sealing ring 150 is provided between the first end 210 and the first end cap 110 to prevent leakage of the foaming material later.

[0092] Understandably, by providing at least two circumferentially distributed positioning elements 112 around the first end 210 of the inner liner 200 on the first end cap 110, and aligning the positioning elements 112 with the first end 210, the first end 210 of the inner liner 200 can automatically contact and position itself against the positioning elements 112 when the inner liner 200 is hoisted into the shell 100. This ensures the accurate and stable posture of the inner liner 200 within the shell 100, preventing tilting relative to the axial direction of the shell 100. It also eliminates the need for repeated adjustments to the posture of the inner liner 200 after hoisting, simplifying the assembly process, avoiding redundancy, and improving assembly efficiency.

[0093] S103: Fixed connection between inner liner 200 and outer 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 housing 100 to seal the mounting hole 140. A bracket assembly 400 is installed, which securely connects the inner liner 200 to the housing 100. Specifically, bolts are passed through the inner liner bracket 410 and then through the housing 100, fixing the external wall bracket 420 and the pad 430 to the inner liner bracket 410. An inlet / outlet pipe assembly 300 is installed, with the inlet pipe 311 and outlet pipe 312 respectively inserted into the inner liner 200 and connected to an integrally injection-molded threaded connector 320. The threaded connector 320 is then connected to the positioning sleeve 141 to ensure coaxial installation of the inlet / outlet pipe 310 and the mounting hole 140.

[0095] Understandably, the mounting bracket assembly 400 securely connects the inner tank 200 to the outer shell 100, effectively installing the bracket assembly 400 and avoiding the need for additional connecting structures in this step. This results in a simpler, more compact water heater structure, fewer installation steps, and higher installation efficiency. The positioning sleeve 141 on the mounting hole 140 ensures that the inlet and outlet water pipes 310 can pass coaxially through the mounting hole 140 on the outer shell 100 and be stably inserted into the inner tank 200.

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

[0097] S104: Install the second end cap 120 above the housing 100 so that the second end cap 120 is adjacent to the second end 220 of the inner liner 200.

[0098] like Figure 8As shown, the second end cap 120 is installed on top of the housing 100, and a set gap is left between the second end cap 120 and the second end 220 of the inner liner 200, so that the vertical edge of the second end cap 120 is sealed to the housing 100.

[0099] It is understood that the set interval here is actually the installation space of the original foam pad. Since this assembly method eliminates the need for a foam pad, a set interval can be left between the second end 220 and the second end cover 120. This set interval can be filled with foaming material to increase the filling rate of the foaming material, thereby improving the heat insulation performance of the electric water heater. In other embodiments, the axial length of the inner tank 200 can also be extended accordingly, so that the inner tank 200 occupies the set interval, making full use of the internal space of the shell 100 and increasing the capacity of the inner tank 200. This application does not limit this.

[0100] S105: Flip the shell 100 so that the first end cap 110 faces upward, and inject foaming material through the injection port 111 of the first end cap 110 to fill the gap between the inner liner 200 and the shell 100.

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

[0102] It is understandable that starting from the first end cap 110, after the first end cap 110 is connected to the shell 100, placing the first end cap 110 downwards ensures 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 hoisting the inner liner 200 from the second end 220, there is no need to readjust the posture and installation direction of the inner liner 200; the inner liner 200 can be directly installed into the shell 100, effectively reducing assembly operations, simplifying assembly procedures, and improving assembly efficiency.

[0103] Furthermore, since the first end 210 of the inner tank 200 abuts against the first end cap 110, the second end cap 120 can be directly installed on top of the shell 100 after the inner tank 200 is fixedly connected to the shell 100. This eliminates the need for a foam padding layer between the second end 220 of the inner tank 200 and the second end cap 120, further simplifying the assembly process and making the installation more compact. Afterwards, the entire water heater can be flipped over for foam injection, making the entire unit easier to operate.

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

[0105] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electric water heater, characterized in that, The device includes a shell, an electrical chamber, a first end cap, a second end cap, and an inner liner. The shell is fitted onto the inner liner and fixedly connected to it. The electrical chamber is connected to the first end cap. The first end cap and the second end cap are respectively positioned over both ends of the shell. The first end cap has at least two positioning elements circumferentially spaced around the first end of the inner liner, the first end of the inner liner matches and abuts the positioning elements, and the first end cap has a filling port, the second end cap is adjacent to the second end of the inner liner, and the second end is provided with a lifting lug; There is a predetermined interval between the second end cap and the second end of the inner liner.

2. The electric water heater according to claim 1, characterized in that, The first end cap is integrally formed with the electrical chamber.

3. The electric water heater according to claim 1, characterized in that, The inner liner includes two sub-inner liners arranged side by side, which are connected and connected by a lug 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 / outlet water pipe assembly and a bracket assembly. The inlet / outlet water pipe assembly includes an inlet / outlet water pipe and an integrally injection-molded threaded connector. The inlet / outlet water pipe is connected to the threaded connector. The shell has a mounting hole, and a positioning sleeve is provided in the mounting hole. The inlet and outlet water pipes pass through the positioning sleeve and are coaxially inserted into the inner tank. The threaded connector is used to connect with the water pipe. Both the inner liner and the outer shell are fixedly connected to the hanging bracket assembly.

5. The electric water heater according to claim 1, characterized in that, The first end cap has at least two injection ports located on the side of the first end cap near its edge, so that the injection ports avoid the first end.

6. A method for assembling an electric water heater, used for assembling the electric water heater according to any one of claims 1-5, characterized in that, Includes the following steps: The first end cover and electrical compartment are installed at the lower part of the housing; The inner liner is hoisted into the shell by means of a lug located at the second end of the inner liner, with the first end of the inner liner facing the first end cap and abutting against the first end cap; The inner liner and the outer shell are fixedly connected; Install the second end cap above the housing so that the second end cap is adjacent to the second end of the inner liner; The shell is flipped over so that the first end cap faces upward, and foaming material is injected through the injection port of the first end cap to fill the gap between the inner liner and the shell.

7. The electric water heater assembly method according to claim 6, characterized in that, The installation of the first end cover and electrical chamber at the lower part of the housing includes: The first end cap and the electrical chamber are integrally formed and installed on the lower part of the housing.

8. The electric water heater assembly method according to claim 6, characterized in that, The first end of the inner liner faces the first end cap and abuts against the first end cap, including: The first end of the inner liner moves toward at least two positioning members on the first end cap until the first end is positioned and abuts 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 circumferentially spaced 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 method for fixing the inner liner to the outer shell includes: A bracket assembly is installed on the shell and the inner liner support, and a positioning sleeve is installed on the mounting hole of the shell. Then, an inlet and outlet water pipe assembly is installed inside the positioning sleeve, and the shell and the inner liner are fixedly connected by the bracket assembly.

10. The electric water heater assembly method according to claim 6, characterized in that, The installation of the second end cap onto the top of the housing includes: A predetermined interval is left between the second end and the second end cap.

Images