Electric water heater inner container with water nozzle

Abstract

The utility model provides an electric water heater inner container with a water tap, which comprises an inner container body and the water tap, the inner container body comprises a carbon steel layer and a stainless steel layer, the stainless steel layer is arranged on the inner side of the inner container body, the carbon steel layer is arranged on the outer side of the inner container body, the stainless steel layer completely covers the carbon steel layer, and the water tap is made of stainless steel materials. An opening used for installing the water nozzle is formed in the side wall of the inner container body, the water nozzle comprises a round pipe and an installation edge perpendicular to the extending direction of the round pipe, the installation edge is located at the first end of the round pipe and located on the inner side of the inner container body, the second end of the round pipe penetrates through the opening to be located on the outer side of the inner container body, and the installation edge is fixed to a stainless steel layer at the opening of the inner container body. And the round pipe is fixed with the carbon steel layer at the opening of the liner body, so that the water nozzle is fixed at the opening.

Description

Technical Field

[0001] This utility model relates to the field of household appliances, and in particular to an inner tank of an electric water heater with a water tap. Background Technology

[0002] The inner tank and water tap of existing electric water heaters on the market are made of carbon steel plate combined with enamel coating. The carbon steel plate is the main structure of the inner tank and water tap. The inner wall of the carbon steel plate that comes into contact with water is coated with an enamel coating to prevent the carbon steel plate from being corroded by water.

[0003] The existing assembly method for water taps and inner tanks is usually a spliced ​​and welded structure. This results in the weld seam at the connection between the water tap and the inner tank being in direct contact with water. Because the surface quality of the carbon steel plate weld seam on the water storage side inside the inner tank is unstable, the enamel coating covering the weld seam is prone to local defects. Moreover, the thermal expansion coefficients of carbon steel and enamel materials differ significantly. When the electric water heater is working, the inner tank of the electric water heater repeatedly alternates between hot and cold water storage. During thermal expansion and contraction, the enamel layer with local defects is prone to peeling off. These defects mean that the enamel cannot completely cover the inner wall of the carbon steel plate of the inner tank. The exposed carbon steel plate forms a corrosion cell with other steel plates in the inner tank that are well coated with enamel, accelerating the corrosion of the exposed carbon steel plate and easily causing safety hazards such as water leakage. Utility Model Content

[0004] Therefore, it is necessary to provide a corrosion-resistant and durable inner tank for electric water heaters.

[0005] To solve the above-mentioned technical problems, this utility model provides an inner tank of an electric water heater with a water nozzle, including an inner tank body and a water nozzle. The inner tank body includes a carbon steel layer and a stainless steel layer. The stainless steel layer is located on the inner side of the inner tank body, and the carbon steel layer is located on the outer side of the inner tank body. The stainless steel layer completely covers the carbon steel layer. The water nozzle is made of stainless steel. An opening for installing the water nozzle is provided on the side wall of the inner tank body. The water nozzle includes a circular tube and an installation edge perpendicular to the extension direction of the circular tube. The installation edge is located at the first end of the circular tube and on the inner side of the inner tank body. The second end of the circular tube passes through the opening and is located on the outer side of the inner tank body. The installation edge is fixed to the stainless steel layer at the opening of the inner tank body, and the circular tube is fixed to the carbon steel layer at the opening of the inner tank body, so that the water nozzle is fixed at the opening.

[0006] Preferably, an annular stepped surface is provided on the inner liner body around the periphery of the opening. The annular stepped surface is located on the inner side of the inner liner body and is recessed from the inner side of the inner liner body toward the outer side of the inner liner body, thereby forming a limiting groove at the annular stepped surface of the inner liner body. The shape of the limiting groove matches the shape of the mounting edge, and the mounting edge is aligned and embedded in the limiting groove.

[0007] Preferably, the water nozzle is fixedly connected to the inner tank body by welding.

[0008] Preferably, the mounting edge is welded and fixed to the stainless steel layer at the annular step surface.

[0009] Preferably, the circular tube is welded and fixed to the carbon steel layer at the annular step surface.

[0010] Preferably, the mounting edge is located at the end face of the first end of the circular tube, and the plane containing the mounting edge is flush with the port of the first end of the circular tube.

[0011] Preferably, the water nozzle is mounted on the opening via the mounting edge, and the shape of the opening matches the shape of the circular pipe.

[0012] Preferably, the stainless steel layer is made of one of SUS304, SUS316 and SUS201, and the thickness of the stainless steel layer is 0.2mm-1mm.

[0013] Preferably, the carbon steel layer is made of SPCC or SPHC, and the thickness of the carbon steel layer is 1mm-2mm.

[0014] Preferably, the opening includes a water inlet, a water outlet, and a sewage outlet, which are used to fix the water inlet pipe, the water outlet pipe, and the sewage outlet pipe respectively through a water nozzle.

[0015] The beneficial effects of this utility model are as follows: This application uses a composite material of carbon steel and stainless steel as the inner tank material of the water heater. The thermal expansion coefficients of carbon steel and stainless steel are close, and the two layers of materials will not have local detachment defects due to thermal expansion and contraction, leakage, micropores, etc. Moreover, the improved water tap structure and the water tap fixing structure to the inner tank ensure that the carbon steel on the outside of the water tank does not come into contact with the water on the water storage side inside the inner tank. At the same time, the improved assembly and welding process makes the quality and efficiency of water tap welding higher. The use of carbon steel ensures the mechanical properties of the inner tank and water tap, and greatly improves the corrosion resistance of the inner tank of the electric water heater. Attached Figure Description

[0016] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0017] Figure 1 This is a schematic diagram of the inner liner of a preferred embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of the inner liner of a preferred embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of a water tap according to a preferred embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional schematic diagram of a preferred embodiment of the present invention, showing the water nozzle installed at the opening of the inner tank body.

[0021] In the diagram: 1. Inner tank body; 11. Carbon steel layer; 12. Stainless steel layer; 3. Water storage space; 2. Water tap; 21. Round pipe; 22. Mounting edge; 4. Opening; 5. Annular stepped surface; 6. Limiting groove; 7. Water inlet pipe; 8. Water outlet pipe; 9. Sewage pipe. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0023] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] refer to Figures 1-4This utility model provides an inner tank for an electric water heater with a water tap, including an inner tank body 1 and a water tap 2. The inner tank body 1 has a water storage space 3 on its inner side. The inner tank body 1 includes a carbon steel layer 11 and a stainless steel layer 12. The stainless steel layer 12 is disposed on the inner side of the inner tank body 1, and the carbon steel layer 11 is disposed on the outer side of the inner tank body 1. The stainless steel layer 12 completely covers the carbon steel layer 11. The water tap 2 is made of stainless steel. An opening 4 for installing the water tap 2 is provided on the side wall of the inner tank body 1. The water tap 2 is enclosed in... The device includes a circular tube 21 and a mounting edge 22 perpendicular to the extension direction of the circular tube 21. The mounting edge 22 is located at the first end of the circular tube 21 and inside the inner liner body 1. The second end of the circular tube 21 passes through the opening 4 and is located outside the inner liner body 1. The mounting edge 22 is fixed to the stainless steel layer at the opening 4 of the inner liner body 1, and the circular tube 21 is fixed to the carbon steel layer at the location of the opening 4 of the inner liner body 1, so that the water nozzle 2 is fixed at the position of the opening 4 on the inner liner body 1. The water nozzle structure has the advantages of easy installation and convenient welding. After welding and installation, this structure ensures that the water inside the inner liner body 1 only contacts the stainless steel layer and does not contact the carbon steel layer.

[0026] This application uses a carbon steel and stainless steel composite material as the inner tank material for a water heater. The inner tank body is formed using the stainless steel and carbon steel composite material, and the water tap with a specific structure is made of stainless steel. The water tap is then welded to the tank body. This ensures that the parts of the inner tank and water tap that come into contact with water during use are covered with a stainless steel layer, improving the corrosion resistance of the water tap area in the electric water heater's inner tank. Since carbon steel and stainless steel have similar coefficients of thermal expansion, the two layers will not experience localized detachment defects due to thermal expansion and contraction, leakage, or micropores. Furthermore, improvements to the water tap structure and the structure at the water tap's fixing point to the inner tank ensure that the carbon steel on the outside of the water tank does not come into contact with the water inside the inner tank. Simultaneously, improvements to the water tap structure and opening structure also improve the welding and assembly process of the inner tank, resulting in higher quality and efficiency in water tap welding. Using carbon steel ensures the mechanical properties of the inner tank and water tap while also improving the corrosion resistance of the electric water heater's inner tank.

[0027] refer to Figure 4 In a preferred embodiment, an annular stepped surface 5 is provided on the inner liner body 1 around the periphery of the opening. The annular stepped surface 5 is located on the inner side of the inner liner body 1 and is recessed from the inner side of the inner liner body 1 towards the outer side, thereby forming an annular limiting groove 6 around the opening at the annular stepped surface 5 of the inner liner body 1. The shape of the limiting groove 6 matches the shape of the mounting edge 22, and the mounting edge 22 is aligned and embedded in the limiting groove 6. Preferably, the water nozzle 2 is fixedly connected to the inner liner body 1 by welding.

[0028] refer to Figure 4 In a preferred embodiment, the mounting edge 22 is welded to the stainless steel layer at the annular step surface 5. Optionally, weld point A in the accompanying drawings is the marked welding position. Welding point A is performed by resistance welding, laser welding, or other methods to weld the water tap to the inner stainless steel layer.

[0029] The circular tube 21 is welded and fixed to the carbon steel layer at the annular stepped surface 5. Optionally, weld point B of the carbon steel layer in the attached drawing is the marked welding position. The carbon steel weld point welds the water nozzle to the carbon steel plate layer of the tank body from the outside; the main function of welding the carbon steel layer to the water nozzle is to enhance mechanical strength.

[0030] The water tap is welded to the inner tank body at stainless steel weld point A and carbon steel weld point B respectively, and the entire circumference of the water tap is welded to the corresponding stainless steel or carbon steel layer.

[0031] refer to Figure 3 In a preferred embodiment, the mounting edge 22 is located at the end face of the first end of the circular tube 21, and the plane containing the mounting edge 22 is flush with the port of the first end of the circular tube 21. The mounting edge 22 is arranged around the port of the first end of the circular tube 21, and the mounting edge 22 is an annular edge.

[0032] refer to Figure 3 and Figure 4 In a preferred embodiment, the water nozzle 2 is mounted at the opening 4 via the mounting edge 22, and the shape of the opening 4 matches the shape of the circular pipe 21.

[0033] refer to Figure 1 and Figure 4 In a preferred embodiment, the stainless steel layer is made of one of SUS304, SUS316, and SUS201, and the thickness of the stainless steel layer is 0.2mm-1mm. Stainless steel of grades SUS304, SUS316, and SUS201 has excellent corrosion resistance.

[0034] refer to Figure 1 and Figure 4 In a preferred embodiment, the carbon steel layer is made of SPCC or SPHC, and the thickness of the carbon steel layer is 1mm-2mm. SPCC and SPHC carbon steels have good mechanical properties and relatively low cost. A carbon steel layer thickness of 1mm-2mm satisfies the mechanical performance requirements of the water heater inner tank while reducing costs.

[0035] refer to Figure 1 and Figure 2In a preferred embodiment, the opening 4 includes a water inlet, a water outlet, and a sewage outlet, which are used to fix the water inlet pipe, the water outlet pipe, and the sewage outlet pipe through a water nozzle, respectively.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," 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. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An inner tank for an electric water heater with a water tap, characterized in that, The device includes an inner tank body and a water nozzle. The inner tank body comprises a carbon steel layer and a stainless steel layer. The stainless steel layer is located on the inner side of the inner tank body, and the carbon steel layer is located on the outer side of the inner tank body. The stainless steel layer completely covers the carbon steel layer. The water nozzle is made of stainless steel. An opening for installing the water nozzle is provided on the side wall of the inner tank body. The water nozzle includes a circular tube and an installation edge perpendicular to the extension direction of the circular tube. The installation edge is located at the first end of the circular tube and is located on the inner side of the inner tank body. The second end of the circular tube passes through the opening and is located on the outer side of the inner tank body. The installation edge is fixed to the stainless steel layer at the opening of the inner tank body, and the circular tube is fixed to the carbon steel layer at the opening of the inner tank body, so that the water nozzle is fixed at the opening.

2. The inner tank of the electric water heater as described in claim 1, characterized in that, An annular stepped surface is provided around the perimeter of the opening on the inner liner body. The annular stepped surface is located on the inner side of the inner liner body and is recessed from the inner side of the inner liner body toward the outer side of the inner liner body, thereby forming a limiting groove at the annular stepped surface of the inner liner body. The shape of the limiting groove matches the shape of the mounting edge, and the mounting edge is aligned and embedded in the limiting groove.

3. The inner tank of the electric water heater as described in claim 2, characterized in that, The water nozzle is fixedly connected to the inner tank body by welding.

4. The inner tank of the electric water heater as described in claim 2, characterized in that, The mounting edge is welded and fixed to the stainless steel layer at the annular step surface.

5. The inner tank of the electric water heater as described in claim 4, characterized in that, The circular tube is welded and fixed to the carbon steel layer at the annular step surface.

6. The inner tank of the electric water heater as described in claim 1, characterized in that, The mounting edge is located at the end face of the first end of the circular tube, and the plane on which the mounting edge is located is flush with the port of the first end of the circular tube.

7. The inner tank of the electric water heater as described in claim 6, characterized in that, The water nozzle is installed at the opening via the mounting edge, and the shape of the opening matches the shape of the circular pipe.

8. The inner tank of the electric water heater as described in claim 1, characterized in that, The stainless steel layer is made of one of SUS304, SUS316 and SUS201, and the thickness of the stainless steel layer is 0.2mm-1mm.

9. The inner tank of an electric water heater as described in claim 8, characterized in that, The carbon steel layer is made of SPCC or SPHC and has a thickness of 1mm-2mm.

10. The inner tank of the electric water heater as described in claim 1, characterized in that, The opening includes a water inlet, a water outlet, and a sewage outlet, which are used to fix the water inlet pipe, water outlet pipe, and sewage outlet pipe respectively through a water nozzle.

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