Inner container sealing structure, inner container assembly and electric water heater

Abstract

The utility model relates to the technical field of household appliances, and discloses an inner container sealing structure, an inner container assembly and an electric water heater. The inner container assembly comprises a first flange piece, a second flange piece and a sealing piece, and the first flange piece is arranged outside the installation opening in a sleeving mode and connected with the inner container. The second flange piece is located above the installation opening and connected with the first flange piece. The sealing piece is arranged between the mounting opening and the second flange piece, one side of the sealing piece is provided with a first attaching face attached to the second flange piece, and the other side of the sealing piece is provided with a second attaching face attached to the mounting opening. According to the inner container sealing structure, the first binding face and the second binding face are arranged on the sealing piece, so that stress concentration can be reduced, uncontrollable deformation of the sealing piece under the pressing action of the container body and the second flange piece is avoided, tight binding is kept between the sealing piece and the second flange piece, and tight binding is kept between the sealing piece and the mounting opening; therefore, a better sealing effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to an inner tank sealing structure, an inner tank assembly, and an electric water heater. Background Technology

[0002] A water heater is a device that uses various physical principles to raise the temperature of cold water to produce hot water within a certain time. Based on their working principles, water heaters can be divided into electric water heaters, gas water heaters, solar water heaters, magnetic water heaters, and air source water heaters. Among them, electric water heaters are popular with users due to their advantages such as small footprint, convenient temperature adjustment, and high safety and reliability.

[0003] The inner tank assembly of an electric water heater typically includes a tank body, a flange cup, a flange ring, and a sealing gasket. The flange cup is fitted over the tank opening and is integrally formed with the tank body. The flange ring is located above the tank opening and is fixedly connected to the flange cup by fasteners. The sealing gasket is placed between the tank opening and the flange ring to seal the inner tank assembly, preventing water leakage from inside the tank during use and protecting the tank opening from wear or damage caused by prolonged water flow impact or temperature changes. However, during actual assembly, after the fasteners fix the flange ring and flange cup together, the sealing gasket can undergo uncontrollable deformation under the pressure of the flange ring and flange cup. This can lead to excessive localized stress on the sealing gasket, discontinuous sealing area, poor sealing effect, and in severe cases, gasket rupture, causing water leakage and affecting the user experience.

[0004] Therefore, there is an urgent need to propose an inner liner sealing structure to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide an inner tank sealing structure, an inner tank assembly, and an electric water heater, which has a better sealing effect, higher safety, and can improve the user experience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An inner tank sealing structure for sealing the tank body of an electric water heater, the tank body having an installation port, the inner tank sealing structure comprising:

[0008] The first flange is fitted over the mounting port and connected to the inner liner;

[0009] The second flange is located above the mounting port and is connected to the first flange;

[0010] A sealing element is disposed between the mounting port and the second flange. One side of the sealing element has a first contact surface that fits with the second flange, and the other side of the sealing element has a second contact surface that fits with the mounting port.

[0011] As a preferred embodiment of the inner liner sealing structure provided by this utility model, the sealing element is provided with a first transition fillet with a radius of R1 on the side facing the second flange to form the first mating surface, and 1.3mm≤R1≤2.0mm.

[0012] As a preferred embodiment of the inner liner sealing structure provided by this utility model, the outer edge of the mounting port is folded outward to form a flange structure, and the second mating surface includes a connected arc mating surface and a planar mating surface. The arc mating surface is mated to the inner wall of the mounting port, and the planar mating surface is mated to the side of the flange structure that is away from the first flange.

[0013] As a preferred embodiment of the inner liner sealing structure provided by this utility model, the sealing element is provided with a second transition fillet with a radius of R2 on the side facing the liner to form the arc-shaped contact surface, and 0.8mm≤R2≤1.5mm.

[0014] As a preferred embodiment of the inner liner sealing structure provided by this utility model, a groove is formed between the flange structure and the outer wall of the liner, and the first flange part is inserted into the groove.

[0015] As a preferred embodiment of the inner liner sealing structure provided by this utility model, the height H of the portion of the sealing element that extends into the mounting port but does not contact the inner wall of the mounting port is 2.5mm to 3.5mm.

[0016] As a preferred embodiment of the inner liner sealing structure provided by this utility model, the inner liner sealing structure further includes fasteners, the first flange has a first connecting hole, the second flange has a second connecting hole corresponding to the first connecting hole, the sealing element has an intermediate connecting hole corresponding to the first connecting hole, and the fasteners are sequentially inserted through the first connecting hole, the intermediate connecting hole and the second connecting hole.

[0017] As a preferred embodiment of the inner liner sealing structure provided by this utility model, the sealing element includes:

[0018] An annular sealing body is disposed between the mounting port and the second flange, and both the first contact surface and the second contact surface are disposed on the annular sealing body;

[0019] A connecting ear is attached to the periphery of the annular sealing body, and the central connecting hole is formed on the connecting ear.

[0020] This utility model also provides an inner liner assembly, including a liner body and an inner liner sealing structure as described above, wherein a first flange of the inner liner sealing structure is connected to the liner body.

[0021] This utility model also provides an electric water heater, including a heating component and an inner tank assembly as described above. The heating component is disposed in the tank body of the inner tank assembly to heat the water in the tank body.

[0022] The beneficial effects of this utility model are as follows:

[0023] The inner liner sealing structure provided by this utility model reduces stress concentration by providing a first contact surface on the sealing element that can fit with the second flange and a second contact surface that can fit with the installation port. This prevents uncontrollable deformation of the sealing element under the pressure of the inner liner and the second flange, thus ensuring a tight fit between the sealing element and the second flange, as well as between the sealing element and the installation port. This achieves a better sealing effect, thereby preventing water leakage during the use of the inner liner assembly, ensuring the safety of the inner liner assembly, and improving the user experience.

[0024] The inner liner assembly provided by this utility model can achieve a better sealing effect and higher safety by applying the above-mentioned inner liner sealing structure, thereby improving the user experience.

[0025] The electric water heater provided by this utility model, by applying the above-mentioned inner tank component, can maintain good sealing of the entire electric water heater, avoid water leakage during use, is safe and reliable, has a long service life, and can improve the user experience. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a partial cross-sectional view of the inner liner assembly provided in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the sealing element provided in an embodiment of the present invention from one perspective;

[0029] Figure 3 This is a structural schematic diagram of the sealing element provided in an embodiment of the present invention from another perspective;

[0030] Figure 4 This is a top view schematic diagram of the sealing element provided in an embodiment of this utility model;

[0031] Figure 5 yes Figure 4 Schematic diagram of cross-section at AA.

[0032] In the picture:

[0033] 100. Sealed inner liner structure;

[0034] 10. Sealing element; 11. Annular sealing body; 111. First mating surface; 112. Second mating surface; 1121. Arc-shaped mating surface; 1122. Flat mating surface; 12. Connecting ear; 121. Central connecting hole;

[0035] 20. First flange component;

[0036] 30. Second flange;

[0037] 40. Fasteners; 41. Bolts; 42. Nuts;

[0038] 200, Inner tube; 2001, Mounting port; 2002, Flanged structure; 2003, Groove. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed 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 utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly 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 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 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.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] Figure 1 A partial cross-sectional view of the inner liner assembly provided in this embodiment is shown. Figure 1 As shown, this embodiment provides an inner liner assembly, which includes a liner body 200 and an inner liner sealing structure 100. The liner body 200 has an installation port 2001, and the inner liner sealing structure 100 is used to seal the installation port 2001. By providing the inner liner sealing structure 100, the sealing performance of the liner body 200 can be guaranteed to prevent leakage during use, thereby ensuring the safety of the inner liner assembly. In addition, the inner liner sealing structure 100 can also prevent the installation port 2001 from being worn or damaged due to prolonged water flow impact or temperature changes, thereby extending the service life of the inner liner assembly.

[0044] Figure 2 A schematic diagram of the structure of the seal 10 provided in this embodiment is shown from one perspective. Figure 3 A schematic diagram of the seal 10 provided in this embodiment is shown from another perspective. (See diagram below.) Figures 2-3 and combined Figure 1As shown, the inner liner sealing structure 100 includes a sealing element 10, a first flange 20, and a second flange 30. The first flange 20 is sleeved outside the mounting port 2001 and connected to the liner 200. The second flange 30 is located above the mounting port 2001 and connected to the first flange 20. The sealing element 10 is disposed between the mounting port 2001 and the second flange 30. One side of the sealing element 10 is provided with a first contact surface 111 that fits against the second flange 30, and the other side of the sealing element 10 is provided with a second contact surface 112 that fits against the mounting port 2001.

[0045] The inner liner sealing structure 100 provided in this embodiment reduces stress concentration by providing a first contact surface 111 on the sealing element 10 that can contact the second flange 30 and a second contact surface 112 that can contact the mounting port 2001. This prevents uncontrollable deformation of the sealing element 10 under the compression of the inner liner 200 and the second flange 30, thus ensuring a tight fit between the sealing element 10 and the second flange 30, and between the sealing element 10 and the mounting port 2001. This achieves a better sealing effect, preventing water leakage during use of the inner liner assembly, ensuring the safety of the inner liner assembly, and improving the user experience. Simulation verification shows that after assembly, the sealing element 10 can form two continuous sealing areas, eliminating poor contact between it and the inner liner 200 and the second flange 30, reducing stress concentration, and thus extending the service life of the sealing element 10.

[0046] Figure 4 A top view of the seal 10 provided in this embodiment is shown. Figure 5 It shows Figure 4 A cross-sectional view at point AA. (See diagram.) Figures 4-5 and combined Figure 1 , Figure 2 As shown, the sealing element 10 has a first transition fillet with a radius of R1 on the side facing the second flange 30 to form the aforementioned first mating surface 111. That is, during processing, the operator achieves the processing of the first mating surface 111 by machining the transition fillet on the sealing element 10, thereby providing a smooth transition effect, simplifying the processing process, and improving processing efficiency. Optionally, the first transition fillet within the size range of 1.3mm ≤ R1 ≤ 2.0mm can better fit with the side of the second flange 30 facing the inner liner 200, thereby ensuring the sealing effect between the sealing element 10 and the second flange 30. For example, the radius R1 of the first transition fillet can be 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, etc. Of course, the specific value of the radius R1 of the first transition fillet is not limited to the above range, and the designer can adjust the above value according to the actual processing requirements and the specific dimensions of the second flange 30.

[0047] like Figure 1 , Figure 3 and Figure 5 As shown, the outer edge of the mounting port 2001 is folded outward to form a flange structure 2002. The second mating surface 112 includes a connected arc-shaped mating surface 1121 and a flat mating surface 1122. The arc-shaped mating surface 1121 is mated to the inner wall of the mounting port 2001, and the flat mating surface 1122 is mated to the side of the flange structure 2002 facing away from the first flange 20. By setting the flange structure 2002, the sealing area between the second mating surface 112 and the bladder 200 can be increased, thereby ensuring the sealing effect between the sealing element 10 and the bladder 200. Specifically, the inner wall of the mounting port 2001 and the flange structure 2002 are transitioned by an arc-shaped transition surface to avoid breakage due to stress concentration at the mounting port 2001 of the bladder 200. The arc-shaped mating surface 1121 is mated to the arc-shaped transition surface.

[0048] Furthermore, the sealing element 10 has a second transition fillet with a radius of R2 on the side facing the bladder 200 to form the aforementioned arc-shaped mating surface 1121. That is, during processing, the operator achieves the machining of the arc-shaped mating surface 1121 by machining the transition fillet on the sealing element 10, thereby providing a smooth transition effect, simplifying the machining process, and improving machining efficiency. Optionally, the second transition fillet within the size range of 0.8mm ≤ R2 ≤ 1.5mm can better fit with the inner wall of the mounting opening 2001, thereby ensuring the sealing effect between the sealing element 10 and the bladder 200. For example, the radius R2 of the second transition fillet can be 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.2mm, 1.2mm, etc. Of course, the specific value of the radius R2 of the second transition fillet is not limited to the above range, and the designer can adjust the above value according to the actual machining requirements and the specific dimensions of the mounting opening 2001 of the bladder 200.

[0049] It is understandable that, such as Figure 1 As shown, after the inner liner assembly is assembled, the seal 10 is pressed between the liner body 200 and the second flange 30. At this time, the bottom portion of the seal 10 extends into the mounting port 2001, but does not contact the inner wall of the mounting port 2001. This part is to ensure that there is a maximum contact area between the seal 10 and the inner wall of the mounting port 2001 to improve the sealing effect, but it does not play a sealing role in actual use. Therefore, in this embodiment, the height H of the part of the seal 10 that extends into the mounting port 2001 but does not contact the inner wall of the mounting port 2001 is 2.5mm to 3.5mm, so as to ensure a good sealing effect between the seal 10 and the inner wall of the mounting port 2001 while reducing the material used for the seal 10 and reducing material costs.

[0050] It should be explained that the "height of the portion of the seal 10 that extends into the mounting port 2001 but does not contact the inner wall of the mounting port 2001" specifically refers to... Figure 1 In the placement direction shown, the dimension along the axial direction of the portion of the seal 10 extending into the mounting port 2001 but not contacting the inner wall of the mounting port 2001 is shown. For example, the height H of the portion of the seal 10 extending into the mounting port 2001 but not contacting the inner wall of the mounting port 2001 can be 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, etc. Of course, the specific value of H is not limited to the above range, and designers can adjust the above values ​​according to actual processing requirements.

[0051] like Figure 1 and Figure 2 As shown, the inner liner sealing structure 100 also includes a fastener 40. A first connecting hole is provided on the first flange 20, and a second connecting hole corresponding to the first connecting hole is provided on the second flange 30. An intermediate connecting hole 121 corresponding to the first connecting hole is provided on the sealing element 10. The fastener 40 passes through the first connecting hole, the intermediate connecting hole 121, and the second connecting hole in sequence, thereby achieving a stable connection between the inner liner sealing structure 100 and the liner 200. At the same time, it can provide a clamping force on the sealing element 10, thereby ensuring a good sealing effect between the inner liner sealing structure 100 and the liner 200. By providing an intermediate connecting hole 121 on the sealing element 10 for the fastener 40 to pass through, the fastener 40 can tighten the sealing element 10, so as to prevent it from detaching from the liner 200 and falling into the liner 200 under the squeezing action of the liner 200 and the second flange 30, which would affect the sealing effect and cause water leakage of the inner liner assembly.

[0052] Specifically, the fastener 40 includes a fastening bolt 41 and a fastening nut 42. The fastening bolt 41 passes through the first connecting hole, the intermediate connecting hole 121 and the second connecting hole in sequence, and is threadedly connected to the fastening nut 42. The bolt connection has the advantages of simple structure, easy operation and tight connection.

[0053] Optionally, there are multiple first connecting holes, which are distributed circumferentially along the first flange 20. Each first connecting hole corresponds to a second connecting hole, an intermediate connecting hole 121, and a fastener 40. This arrangement can improve the stability of the connection between the inner liner sealing structure 100 and the liner body 200, while ensuring the uniformity of force on the sealing element 10, thereby further ensuring good sealing performance between the inner liner sealing structure 100 and the liner body 200. In this embodiment, the number of first connecting holes, second connecting holes, intermediate connecting holes 121, and fasteners 40 are all four. While ensuring a stable connection between the inner liner sealing structure 100 and the liner body 200, the number of first connecting holes, second connecting holes, intermediate connecting holes 121, and fasteners 40 is reduced, thereby reducing processing difficulty and improving processing efficiency.

[0054] like Figures 3-5 As shown, the seal 10 includes an annular sealing body 11 and a connecting ear 12. The annular sealing body 11 is disposed between the mounting port 2001 and the second flange 30, and both the first mating surface 111 and the second mating surface 112 are disposed on the annular sealing body 11. The connecting ear 12 is connected to the periphery of the annular sealing body 11, and a central connecting hole 121 is formed on the connecting ear 12. Compared with the scheme of setting the seal 10 as a large annular structure and forming a central connecting hole 121 along the circumference of the annular structure, the above arrangement can reduce the material used in the seal 10, thereby reducing material costs. In this embodiment, the annular sealing body 11 and the connecting ear 12 are integrally formed, which can save the connection structure between the annular sealing body 11 and the connecting ear 12, simplify the processing steps, improve processing efficiency, and at the same time ensure the overall structural strength of the seal 10. Optionally, the seal 10 is a sealing gasket.

[0055] Continue as Figure 1 As shown, to achieve a stable connection between the inner liner sealing structure 100 and the liner body 200, a groove 2003 is formed between the flange structure 2002 and the outer wall of the liner body 200. The first flange 20 is partially inserted into the groove 2003, thereby forming a fitted structure between the first flange 20 and the liner body 200, which improves the stability of the connection between the inner liner sealing structure 100 and the liner body 200. In this embodiment, the first flange 20 is welded to the liner body 200, resulting in high connection strength, good sealing performance, and high processing efficiency.

[0056] This embodiment also provides an electric water heater, including a heating element and the aforementioned inner tank assembly. The heating element is disposed within the tank body 200 of the inner tank assembly to heat the water in the tank body 200. By using the aforementioned inner tank assembly, the entire electric water heater can maintain good sealing, preventing leaks during use, ensuring safety and reliability, extending its service life, and improving the user experience.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An inner tank sealing structure for sealing the tank body (200) of an electric water heater, said tank body (200) having an installation port (2001), characterized in that, The inner liner sealing structure includes: The first flange (20) is fitted over the mounting port (2001) and connected to the inner tube (200); The second flange (30) is located above the mounting port (2001) and is connected to the first flange (20); A sealing element (10) is disposed between the mounting port (2001) and the second flange (30). One side of the sealing element (10) is provided with a first contact surface (111) that is in contact with the second flange (30), and the other side of the sealing element (10) is provided with a second contact surface (112) that is in contact with the mounting port (2001).

2. The inner liner sealing structure according to claim 1, characterized in that, The sealing element (10) is provided with a first transition fillet with a radius of R1 on the side facing the second flange (30) to form the first mating surface (111), and 1.3mm≤R1≤2.0mm.

3. The inner liner sealing structure according to claim 1, characterized in that, The outer edge of the mounting opening (2001) is folded outward to form a flange structure (2002). The second mating surface (112) includes a connected arc mating surface (1121) and a flat mating surface (1122). The arc mating surface (1121) is mated to the inner wall of the mounting opening (2001), and the flat mating surface (1122) is mated to the side of the flange structure (2002) facing away from the first flange (20).

4. The inner liner sealing structure according to claim 3, characterized in that, The sealing element (10) is provided with a second transition fillet with a radius of R2 on the side facing the bladder (200) to form the arc-shaped mating surface (1121), and 0.8mm≤R2≤1.5mm.

5. The inner liner sealing structure according to claim 3, characterized in that, A groove (2003) is formed between the flange structure (2002) and the outer wall of the bladder (200), and the first flange (20) is partially inserted into the groove (2003).

6. The inner liner sealing structure according to claim 1, characterized in that, The height H of the portion of the seal (10) that extends into the mounting port (2001) but does not contact the inner wall of the mounting port (2001) is 2.5 mm to 3.5 mm.

7. The inner liner sealing structure according to any one of claims 1 to 6, characterized in that, The inner liner sealing structure also includes fasteners (40), the first flange (20) has a first connecting hole, the second flange (30) has a second connecting hole corresponding to the first connecting hole, the sealing element (10) has an intermediate connecting hole (121) corresponding to the first connecting hole, and the fasteners (40) are sequentially inserted through the first connecting hole, the intermediate connecting hole (121) and the second connecting hole.

8. The inner liner sealing structure according to claim 7, characterized in that, The seal (10) includes: An annular sealing body (11) is disposed between the mounting port (2001) and the second flange (30), and the first mating surface (111) and the second mating surface (112) are both disposed on the annular sealing body (11); A connecting ear (12) is connected to the periphery of the annular sealing body (11), and the intermediate connecting hole (121) is opened on the connecting ear (12).

9. An inner liner assembly, characterized in that, It includes a bladder body (200) and an inner bladder sealing structure as described in any one of claims 1 to 8, wherein a first flange (20) of the inner bladder sealing structure is connected to the bladder body (200).

10. An electric water heater, characterized in that, It includes a heating component and an inner tank assembly as claimed in claim 9, wherein the heating component is disposed in the tank body (200) of the inner tank assembly to heat the water in the tank body (200).

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