Stainless steel composite inner tank for electric water heater

Abstract

The application relates to a stainless steel composite inner container of an electric water heater, which comprises a first inner container part and a second inner container part; the first inner container part and the second inner container part are made of a stainless steel composite plate, the stainless steel composite plate comprises a stainless steel layer; the stainless steel layer of the first inner container part is welded with the stainless steel layer of the second inner container part to form a water storage space; the number of weld seams between the first inner container part and the second inner container part is one; compared with the prior art, the technical scheme of the application adopts the stainless steel composite plate and only sets one weld seam between the stainless steel layers, improves the corrosion resistance and structural stability of the inner container of the electric water heater, reduces safety hazards, and prolongs the service life.

Description

Technical Field

[0001] This application relates to the field of electric water heater technology, and in particular to a stainless steel composite electric water heater inner tank. Background Technology

[0002] In the field of electric water heaters, the inner tank is a core component, generally consisting of the tank body and end caps on both sides. Its corrosion resistance directly affects the service life and safety of the electric water heater. Currently, the inner tanks of existing electric water heaters on the market generally adopt a structural design of carbon steel plate + enamel coating. The enamel coating is used to protect the carbon steel plate and enhance its corrosion resistance.

[0003] However, in actual production, the enamel layer of the inner tank of the water heater and the end cap, as well as the welded joints, is prone to problems such as enamel leakage, micropores, and bubbles; and during the use of electric water heaters, the enamel layer is also very prone to falling off due to thermal expansion and contraction.

[0004] These defects prevent the enamel from completely covering the inner wall of the carbon steel plate of the inner tank, causing the exposed carbon steel plate to form a corrosion cell with other steel plates on the inner tank that are well coated with enamel. This accelerates the corrosion process of the exposed carbon steel plate and can easily lead to safety hazards such as water leakage in electric water heaters, greatly affecting the reliability and safety of electric water heaters. Utility Model Content

[0005] This application provides a stainless steel composite electric water heater inner tank, which uses stainless steel composite plates and has only one weld between the stainless steel layers, thereby improving the corrosion resistance and structural stability of the electric water heater inner tank, reducing safety hazards, and extending its service life.

[0006] In a first aspect, this application provides a stainless steel composite electric water heater inner tank, comprising: a first inner tank component and a second inner tank component; the first inner tank component and the second inner tank component are made of a stainless steel composite plate, the stainless steel composite plate comprising a stainless steel layer; the stainless steel layer of the first inner tank component and the stainless steel layer of the second inner tank component are welded together to form a water storage space; the number of welds between the first inner tank component and the second inner tank component is 1.

[0007] In one possible implementation, the stainless steel composite plate further includes a carbon steel plate layer; the outer layer of the first inner liner component and the second inner liner component is the carbon steel plate layer, and the inner layer of the first inner liner component and the second inner liner component is the stainless steel layer; wherein the stainless steel layer is bonded to the carbon steel plate layer.

[0008] In one possible implementation, the weld point formed by welding the first inner liner component and the second inner liner component is located at the stainless steel layer where the first inner liner component and the second inner liner component meet; and the cross-sectional connection structure between the stainless steel layers of the first inner liner component and the second inner liner component at the weld point is a triangular pointed structure.

[0009] In one possible implementation, the first inner liner component is a first end cap, and the second inner liner component is a second end cap.

[0010] In one possible implementation, the water in the water storage space is in contact with the stainless steel layer, but the water in the water storage space is not in contact with the carbon steel plate layer.

[0011] In one possible implementation, the length of the water storage space is determined by the stamping depth of the first inner liner component and the second inner liner component.

[0012] In one possible implementation, the stainless steel composite plate is formed by blanking, stamping, and trimming.

[0013] In one possible implementation, the welding includes laser welding, resistance welding, or argon arc welding.

[0014] In one possible implementation, the second inner liner component has a first opening in the middle, and the diameter of the first opening is smaller than the diameter of the second inner liner component.

[0015] In one possible implementation, the stainless steel composite electric water heater inner tank provided in this application further includes a water outlet nozzle and a water inlet nozzle; wherein the water outlet nozzle is located below the first inner tank component, and the water inlet nozzle is located below the second inner tank component.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art:

[0017] This application provides a stainless steel composite electric water heater inner tank, comprising: a first inner tank component and a second inner tank component; the first inner tank component and the second inner tank component are made of stainless steel composite plate, the stainless steel composite plate including a stainless steel layer; the stainless steel layer of the first inner tank component and the stainless steel layer of the second inner tank component are welded together to form a water storage space; the number of welds between the first inner tank component and the second inner tank component is 1; compared with the prior art, the technical solution of this application uses a stainless steel composite plate to prepare the first inner tank component and the second inner tank component, and utilizes the good corrosion resistance of the stainless steel layer to avoid corrosion problems caused by coating defects, thereby improving the corrosion resistance of the inner tank; moreover, the stainless steel composite electric water heater inner tank is only welded between the stainless steel layers of the first inner tank component and the second inner tank component, with only 1 weld, reducing the number of welding points, which on the one hand reduces the probability of welding defects, and on the other hand reduces the corrosion risk points that may be caused by multiple welds, which helps to enhance the overall structural stability and corrosion resistance reliability of the inner tank, thereby extending the service life of the electric water heater and reducing safety hazards such as water leakage. Attached Figure Description

[0018] 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.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a schematic diagram of the structure of the inner tank of a stainless steel composite electric water heater provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the first inner liner component provided in an embodiment of this application;

[0023] Figure 3 A schematic diagram of the welded cross-section of the inner tank of a stainless steel composite electric water heater provided for an embodiment of this application;

[0024] Figure 4 Schematic diagrams of water storage spaces of different lengths provided in embodiments of this application;

[0025] Figure 5 This is another structural schematic diagram of a stainless steel composite electric water heater inner tank provided in an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments 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.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0028] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0029] Figure 1 This application provides a schematic diagram of the structure of the inner tank of a stainless steel composite electric water heater; as shown in the embodiment. Figure 1 As shown, the stainless steel composite electric water heater inner tank includes a first inner tank component 1 and a second inner tank component 2, as detailed below:

[0030] In one embodiment, the first inner liner component 1 and the second inner liner component 2 are made of stainless steel composite plate, wherein the stainless steel composite plate includes a stainless steel layer 3.

[0031] In one embodiment, the stainless steel composite plate further includes a carbon steel plate layer 4; the outer layer of the first inner liner component 1 and the second inner liner component 2 is the carbon steel plate layer 4, and the inner layer of the first inner liner component 1 and the second inner liner component 2 is the stainless steel layer 3; wherein the stainless steel layer 3 is bonded to the carbon steel plate layer 4; as shown Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the first inner liner component 1 provided in an embodiment of this application.

[0032] In one embodiment, the stainless steel composite plate is formed by blanking, stamping and trimming.

[0033] Specifically, the processing steps of the stainless steel composite plate are as follows: Blanking: According to the design dimensions of the first inner liner component 1 and the second inner liner component 2, the stainless steel composite plate is cut to obtain a plate that conforms to the blank specifications of the first inner liner component 1 and the second inner liner component 2; Stamping: Pressure is applied to the blank plate using a stamping device to form the prototype of the first inner liner component 1 and the second inner liner component 2 with an arc-shaped concave cavity, wherein the concave cavity is the core component of the subsequent water storage space; Edge trimming: The edges of the prototype of the first inner liner component 1 and the second inner liner component 2 after stamping are trimmed to prepare for subsequent welding.

[0034] In one embodiment, the first inner liner component 1 is a first end cap, and the second inner liner component 2 is a second end cap.

[0035] Preferably, the first end cap is the left end cap and the second end cap is the right end cap.

[0036] In one embodiment, the thickness of the stainless steel layer 3 is 0.2mm-1mm.

[0037] Preferably, the stainless steel layer 3 is made of materials including but not limited to SUS304, SUS316, SUS201, etc. These materials have low cost and excellent mechanical strength and pressure resistance, which can prevent the inner liner from undergoing excessive deformation under water pressure and provide reliable structural support for the inner liner.

[0038] In one embodiment, the thickness of the carbon steel plate layer 4 is 1mm-2mm.

[0039] Preferably, the material of the carbon steel plate layer 4 includes, but is not limited to, SPCC, SPHC and other materials. These materials have low cost and excellent mechanical strength and pressure resistance, which can prevent the inner liner from undergoing excessive deformation under water pressure and provide reliable structural support for the inner liner.

[0040] Specifically, because the carbon steel plate layer 4 has excellent mechanical properties, it can bear pressure and prevent excessive deformation of the stainless steel layer 3 inside the inner tank; and the stainless steel layer 3 inside the inner tank can resist corrosion; the thermal expansion coefficients of carbon steel and stainless steel are similar, and the stainless steel layer 3 is not easy to fall off; there will be no defects between the two layers of materials due to thermal expansion and contraction, leakage, micropores, etc., which greatly improves the corrosion resistance of the stainless steel composite electric water heater inner tank.

[0041] In one embodiment, the stainless steel layer 3 of the first inner liner component 1 is welded to the stainless steel layer 3 of the second inner liner component 2 to form a water storage space 10, such as... Figure 3 As shown, Figure 3 This is a schematic diagram of the welded cross-section of the inner tank of a stainless steel composite electric water heater, provided as an embodiment of this application.

[0042] Specifically, the outer layers of the first inner liner component 1 and the second inner liner component 2 are on the side away from the water storage space 10, and the inner layers of the first inner liner component 1 and the second inner liner component 2 are on the side facing the water storage space 10.

[0043] Specifically, the first inner liner component 1 and the second inner liner component 2 are arc-shaped concave cavities.

[0044] Specifically, the edges of the arc-shaped concave cavities of the first inner liner component 1 and the second inner liner component 2 are outwardly flared. When the first inner liner component 1 and the second inner liner component 2 are placed opposite each other, the stainless steel layer 3 of the first inner liner component 1 and the stainless steel layer 3 of the second inner liner component 2 are welded together.

[0045] Specifically, the stainless steel layer 3 at the joint is welded using an adaptive welding process, wherein the welding includes laser welding, resistance welding or argon arc welding; laser welding has the advantages of narrow weld seam and small heat-affected zone, resistance welding has high efficiency and low cost, and argon arc welding has stable welding quality.

[0046] In one embodiment, the weld point 20 formed by welding the first inner liner component 1 and the second inner liner component 2 is located at the stainless steel layer 3 where the first inner liner component 1 and the second inner liner component 2 meet; and the cross-sectional connection structure between the stainless steel layer 3 of the first inner liner component 1 and the second inner liner component 2 at the weld point 20 is a triangular pointed structure.

[0047] Specifically, the weld point 20 is located at the stainless steel layer 3 where the first inner liner component 1 and the second inner liner component 2 meet, and the cross-sectional connection structure of the two stainless steel layers at the weld point 20 is a triangular pointed structure. This structure can enhance the tensile strength and sealing of the weld point 20 and prevent water leakage caused by welding gaps.

[0048] In one embodiment, the number of welds between the first inner liner component 1 and the second inner liner component 2 is 1.

[0049] Specifically, after welding, only one continuous weld is formed between the first inner liner component 1 and the second inner liner component 2, and there are no other additional welds in the entire inner liner, which greatly reduces the corrosion risk of traditional inner liners with multiple welds.

[0050] In one embodiment, the water in the water storage space 10 is in contact with the stainless steel layer 3, but the water in the water storage space 10 is not in contact with the carbon steel plate layer 4. This design fundamentally avoids the corrosion problem caused by the exposure of carbon steel plates due to enamel defects in traditional inner tanks.

[0051] In one embodiment, the length of the water storage space 10 is determined by the stamping depth of the first inner liner component 1 and the second inner liner component 2, such as... Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of water storage space 10 with different lengths and dimensions provided in the embodiments of this application.

[0052] Specifically, the length of the water storage space 10 can be flexibly adjusted according to the specifications of the electric water heater product. By changing the stamping depth of the first end cover and the second end cover, that is, the rolling depth of the plate during the stamping process, the axial length of the cavity of the two can be changed, thereby adjusting the overall length of the water storage space 10.

[0053] In one embodiment, the second inner liner component 2 has a first opening in the middle, and the diameter of the first opening is smaller than the diameter of the second inner liner component 2.

[0054] Specifically, the second inner tank component 2 has a first opening in the center of the arc-shaped groove. This opening allows the internal components of the electric water heater to be assembled inside the tank through the opening of the second inner tank component 2 during installation. In later use, if these components malfunction and need to be repaired or replaced, they can also be easily operated through the opening, reducing the difficulty of repair and improving maintenance efficiency.

[0055] In one embodiment, the stainless steel composite electric water heater inner tank provided in this application further includes a water outlet nozzle 5 and a water inlet nozzle 6; wherein, the water outlet nozzle 5 is disposed below the first inner tank component 1, and the water inlet nozzle 6 is disposed below the second inner tank component 2; as Figure 5 As shown, Figure 5 This is another structural schematic diagram of a stainless steel composite electric water heater inner tank provided in an embodiment of this application.

[0056] Specifically, the water outlet 5 is used to export hot water from the water storage space 10 to the user end; the water inlet 6 is used to introduce cold water into the water storage space 10; this layout can ensure that after the cold water enters from below the second inner tank component 2, it can evenly fill the water storage space 10, and when the hot water flows out from below the first inner tank component 1, it can avoid stagnant water areas, which meets the water circulation requirements of electric water heaters.

[0057] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0058] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0063] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0064] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A stainless steel composite electric water heater inner tank, characterized in that, include: First inner liner component and second inner liner component; The first inner liner component and the second inner liner component are made of stainless steel composite plate, wherein the stainless steel composite plate includes a stainless steel layer; The stainless steel layer of the first inner tank component is welded to the stainless steel layer of the second inner tank component to form a water storage space; The number of welds between the first inner liner component and the second inner liner component is 1.

2. The stainless steel composite electric water heater inner tank according to claim 1, characterized in that, The stainless steel composite plate also includes a carbon steel plate layer; The outer layer of the first inner liner component and the second inner liner component is the carbon steel plate layer, and the inner layer of the first inner liner component and the second inner liner component is the stainless steel layer; The stainless steel layer is bonded to the carbon steel plate layer.

3. The stainless steel composite electric water heater inner tank according to claim 1, characterized in that, The weld point formed by welding the first inner liner component and the second inner liner component is located at the stainless steel layer where the first inner liner component and the second inner liner component are joined. Furthermore, the cross-sectional connection structure between the stainless steel layers of the first inner liner component and the second inner liner component at the welding point is a triangular pointed structure.

4. The stainless steel composite electric water heater liner of claim 1, wherein, The first inner liner component is a first end cap, and the second inner liner component is a second end cap.

5. The stainless steel composite electric water heater liner of claim 2, wherein, The water in the water storage space is in contact with the stainless steel layer, but the water in the water storage space is not in contact with the carbon steel plate layer.

6. The stainless steel composite electric water heater inner tank according to claim 1, characterized in that, The length of the water storage space is determined by the stamping depth of the first inner liner component and the second inner liner component.

7. The stainless steel composite electric water heater liner of claim 1, wherein, The stainless steel composite plate is formed by blanking, stamping and trimming.

8. The stainless steel composite electric water heater liner of claim 1, wherein, The welding includes laser welding, resistance welding, or argon arc welding.

9. The stainless steel composite electric water heater inner tank according to claim 1, characterized in that, The second inner liner component has a first opening in the middle, and the diameter of the first opening is smaller than the diameter of the second inner liner component.

10. The stainless steel composite electric water heater liner of claim 1, wherein, It also includes water outlet nozzles and water inlet nozzles; The water outlet nozzle is located below the first inner tank component, and the water inlet nozzle is located below the second inner tank component.

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