Heat preservation device and water heater

Abstract

This application relates to a heat preservation device and a water heater. The heat preservation device includes: an outer shell, a separating membrane, an inner tank, and foaming material. The separating membrane is connected to the inner wall of the outer shell. The inner tank is disposed inside the outer shell. The foaming material fills the space between the outer wall of the inner tank and the inner wall of the outer shell. In the above-mentioned heat preservation device, the foaming material filling the space between the outer wall of the inner tank and the inner wall of the outer shell can play a heat preservation role. Because the separating membrane is connected to the inner wall of the outer shell, the part connected to the separating membrane is separated from the foaming material by the separating membrane, so that the foaming material and the inner wall of the outer shell are not bonded together. Thus, the tensile force acting on the inner wall of the outer shell during the cooling and contraction of the foaming material is small, thereby effectively reducing the dent deformation of the outer shell and improving the flatness of the outer shell surface.

Description

Technical Field

[0001] This application relates to the field of thermal insulation technology, and in particular to a thermal insulation device and a water heater. Background Technology

[0002] With the development of water heater technology, water heaters can be classified into many types according to different heating methods, including but not limited to electric water heaters, solar water heaters, and heat pump water heaters. Typically, a water heater consists of an outer shell and an inner tank. The inner tank is installed inside the outer shell and is used to store hot water. To prevent heat transfer from the inner tank to the outer shell, which would reduce its insulation performance, the water heater also includes a heat insulation component placed between the outer shell and the inner tank. This heat insulation component is mostly made of foamed material injected into the space between the outer shell and the inner tank. However, water heaters in related technologies, especially dual-tank water heaters, commonly suffer from the defect of outer shell denting and deformation during the foaming process. Utility Model Content

[0003] The first technical problem solved by this application is to provide a heat preservation device that can effectively reduce the dent deformation of the outer shell and improve the flatness of the outer shell surface.

[0004] The second technical problem solved by this application is to provide a water heater that can effectively reduce the dent deformation of the outer casing and improve the flatness of the outer casing surface.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] On the one hand, this application provides a heat preservation device, comprising:

[0007] shell;

[0008] An isolation membrane is attached to the inner wall of the outer casing;

[0009] Inner liner, wherein the inner liner is disposed within the outer shell; and

[0010] A foaming material is used to fill the space between the outer wall of the inner liner and the inner wall of the outer shell.

[0011] The heat preservation device described in this application has the following advantages compared to the prior art:

[0012] The aforementioned insulation device uses foamed material filled between the outer wall of the inner liner and the inner wall of the outer shell to provide insulation. When the yield strength of the outer shell is weak, a release liner can be applied to the entire inner wall of the outer shell; when the yield strength of the outer shell is relatively strong, a release liner can be applied to a portion of the inner wall of the outer shell. Because the release liner is connected to the corresponding inner wall of the outer shell, the part connected to the release liner is separated from the foamed material by the release liner, so that the foamed material and the corresponding inner wall of the outer shell are not bonded together. In this way, the tensile force acting on the corresponding inner wall of the outer shell during the cooling and shrinkage of the foamed material is small, thereby effectively reducing the dent deformation of the outer shell and improving the flatness of the outer shell surface.

[0013] In one embodiment, the portion of the foamed material whose thickness exceeds a preset value is provided with the isolation membrane corresponding to the projection area of ​​the inner wall of the outer shell along its thickness direction.

[0014] In one embodiment, the foamed material inside the shell has a base thickness of t, and the portion of the foamed material with a thickness exceeding 1.5t is provided with the isolation membrane along its thickness direction in the projection area of ​​the inner wall of the shell.

[0015] In one embodiment, there are two inner liner ...

[0016] Along the width direction of the outer shell, the isolation membrane includes a first isolation membrane, which is disposed on the main shell and corresponds to the position of the foamed material with a thickness ≥ 1.5t1.

[0017] In one embodiment, the insulation device further includes a mounting bracket disposed on the rear side of the main body shell, and the first isolation membrane is located on the front wall of the main body shell and is disposed corresponding to the position of the foaming material with a thickness ≥1.5t1.

[0018] In one embodiment, the first isolation membrane is rectangular, and the length direction of the first isolation membrane is the same as the length direction of the main shell; the length of the first isolation membrane is L1, the length of the inner liner is M1, and the length of the outer shell is M2, wherein M1≤L1≤M2; the cross-sectional radius of the inner liner along its length direction is R, there are two inner liners, which are arranged side by side with a gap, the distance between the central axes of the two inner liners is S, and the width of the first isolation membrane is W1, wherein R≤W1≤S.

[0019] In one embodiment, the outer shell further includes a first end cap and a second end cap, the first end cap being connected to one end of the main shell and the second end cap being connected to the other end of the main shell; the insulation device further includes an insulation component disposed inside the outer shell and located between the inner liner and the second end cap, the insulation component being connected to the second end cap; the first isolation membrane is connected to the front wall of the main shell; the thickness of the foaming material between the first end cap and the inner liner is t2, t2 serving as the base thickness t in the length direction of the outer shell;

[0020] Along the length of the outer shell, the isolation membrane includes a second isolation membrane, which is disposed on the first end cap and corresponds to the position of the foamed material with a thickness ≥ 1.5t2.

[0021] In one embodiment, the outer shell further includes a first end cap and a second end cap, the first end cap being connected to one end of the main shell and the second end cap being connected to the other end of the main shell; the heat insulation device further includes a heat insulation element disposed inside the outer shell and located between the inner liner and the second end cap, the heat insulation element being connected to the second end cap; the first isolation membrane is connected to the front wall of the main shell;

[0022] Along the length of the outer shell, the isolation membrane includes a second isolation membrane, the outer periphery of which is conformally arranged to the outer periphery of the first end cap, and the ratio of the area of ​​the second isolation membrane to the area of ​​the inner wall of the first end cap is 0.9 to 1.

[0023] In one embodiment, the heat-insulating device further includes a first layered membrane disposed between the outer peripheral sidewall of the inner liner and the inner wall of the outer shell, with opposite sides of the first layered membrane respectively connected to two inner liners; and / or, the heat-insulating device further includes a second layered membrane disposed between the axial end face of the inner liner and the inner wall of the outer shell, with opposite sides of the second layered membrane respectively connected to two inner liners; the first layered membrane is rectangular, and its length direction is parallel to the axis of the inner liner. The two layers are arranged in the same direction; the length of the first layered film is L2, the length of the inner liner is M1, and the length of the outer shell is M2, wherein M1≤L2≤M2; the radius of the cross-sectional profile of the inner liner along its length is R, the distance between the central axes of the two inner liners is S, and the width of the first layered film is W2, wherein R≤W2≤S; the second layered film is rectangular, the side length of the second layered film is W3, the radius of the cross-sectional profile of the inner liner along its length is R, and the distance between the central axes of the two inner liners is S, wherein R≤W3≤S.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] On the other hand, this application also provides a water heater, including the aforementioned heat preservation device.

[0026] The water heater described in this application has the following advantages compared to the prior art:

[0027] In the aforementioned water heater, the foamed material is filled between the outer wall of the inner tank and the inner wall of the outer shell, providing insulation. When the yield strength of the outer shell is weak, a separating film can be applied to the entire inner wall of the outer shell; when the yield strength of the outer shell is relatively strong, a separating film can be applied to a portion of the inner wall of the outer shell. Because the separating film is connected to the corresponding inner wall of the outer shell, the part connected to the separating film is separated from the foamed material by the separating film, so that the foamed material and the corresponding inner wall of the outer shell are not bonded together. In this way, the tensile force acting on the corresponding inner wall of the outer shell during the cooling and contraction of the foamed material is small, thereby effectively reducing the dent deformation of the outer shell and improving the flatness of the outer shell surface. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an exploded structural diagram of a heat preservation device according to an embodiment of this application.

[0031] Figure 2 This is a perspective view of the internal structure of a heat preservation device according to an embodiment of this application.

[0032] Figure 3 This is a structural diagram of a first isolation membrane arranged on the front side of the inner liner according to an embodiment of this application.

[0033] Figure 4 This is another structural view of a heat preservation device according to an embodiment of this application.

[0034] Figure 5 This is a structural diagram of a second isolation membrane arranged on a first end cap according to an embodiment of this application.

[0035] Figure 6 This is a structural diagram from another perspective of a heat preservation device according to another embodiment of this application.

[0036] Figure 7 This is a structural diagram of a second isolation membrane arranged on a first end cap according to another embodiment of this application.

[0037] Figure 8 This is a structural diagram of the second layered membrane arranged at the end of the inner liner according to an embodiment of this application.

[0038] Figure label:

[0039] 10. Outer shell; 101. Front wall; 102. Rear wall; 11. Main shell; 12. First end cap; 13. Second end cap; 20. Separating membrane; 21. First separating membrane; 22. Second separating membrane; 30. Inner liner; 40. Insulation component; 41. Glue injection hole; 42. Through hole; 43. Bevel; 50. Mounting bracket; 61. First layered membrane; 62. Second layered membrane. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] As described in the background art, the heat preservation devices in related technologies, such as water heaters, especially dual-tank water heaters, generally suffer from the problem of the outer shell denting and deforming during the foaming process. The inventors have discovered that the reason for this problem is that after the foaming material is foamed, the foam thickness is inconsistent in different parts of the outer shell, resulting in different displacements after cooling and shrinkage, thus causing the outer shell to dent and deform.

[0042] Based on the above reasons, this application provides a heat preservation device that can effectively reduce the dent deformation of the outer shell and improve the flatness of the outer shell surface.

[0043] It should be noted that, for ease of description and understanding, the terms "front", "rear", "up", "down", "left" and "right" in this embodiment refer to the state when the insulation device is installed on the wall for use. The direction in which the insulation device faces the user is front, the direction away from the user is rear, and the vertical direction is up and down.

[0044] It should be noted that the end of the outer shell refers to any end of the outer shell along its length, which can be either the left end or the right end of the outer shell.

[0045] See Figure 1Figure 1 shows an exploded structural diagram of a heat preservation device according to an embodiment of the present application. The heat preservation device provided in this embodiment is specifically a water heater, which can be an electric water heater, a solar water heater, or a heat pump water heater, etc.

[0046] In this embodiment, the water heater is an electric water heater, specifically, for example, a dual-tank electric water heater.

[0047] Please see Figures 1 to 3 In one embodiment, the insulation device includes: an outer shell 10, a separating membrane 20, an inner liner 30, and foaming material (not shown in the figure). The separating membrane 20 is connected to the inner wall of the outer shell 10. The specific connection method of the separating membrane 20 to the inner wall of the outer shell 10 includes, but is not limited to, bonding, electrostatic connection, or snap-fitting. The inner liner 30 is disposed inside the outer shell 10. The foaming material fills the space between the outer wall of the inner liner 30 and the inner wall of the outer shell 10, providing thermal insulation.

[0048] In the aforementioned insulation device, the foamed material is filled between the outer wall of the inner liner 30 and the inner wall of the outer shell 10, thus providing insulation. When the yield strength of the outer shell 10 is weak, an isolation film 20 can be applied to the entire inner wall of the outer shell 10; when the yield strength of the outer shell 10 is relatively strong, an isolation film 20 can be applied to a portion of the inner wall of the outer shell 10. Because the isolation film 20 is connected to the corresponding inner wall of the outer shell 10, the part connected to the isolation film 20 is separated from the foamed material by the isolation film 20, so that the foamed material and the corresponding inner wall of the outer shell 10 are not bonded together. In this way, the tensile force acting on the corresponding inner wall of the outer shell 10 during the cooling and shrinkage of the foamed material is small, thereby effectively reducing the dent deformation of the outer shell 10, improving the flatness of the surface of the outer shell 10, and thus effectively improving the product qualification rate.

[0049] For example, a release liner 20 is provided in the projection area of ​​the foamed material on the inner wall of the outer shell 10 along its thickness direction where the thickness exceeds a preset value. Thus, the tensile force acting on the inner wall of the outer shell 10 is greater where the foamed material thickness exceeds the preset value. Therefore, providing the release liner 20 in the projection area of ​​the foamed material on the inner wall of the outer shell 10 along its thickness direction at this thicker part reduces the tensile force, thereby effectively reducing the localized indentation deformation of the outer shell 10, improving the flatness of the outer shell 10 surface, and thus effectively improving the product qualification rate.

[0050] The preset values ​​can be flexibly adjusted and set according to actual needs, including but not limited to 40mm, 50mm or 80mm, etc.

[0051] Based on the aforementioned embodiments, the foamed material inside the outer shell 10 has a basic thickness, which is set as t. For portions of the foamed material where the thickness exceeds 1.5t, an isolation membrane 20 is correspondingly provided along its thickness direction in the projection area on the inner wall of the outer shell 10.

[0052] For example, there are two inner liners 30, stacked side-by-side with intervals. The outer shell 10 includes a main shell 11, and the thickness of the foamed material between the top of the inner liner 30 and the top of the outer shell 10 is t1. Here, t1 is the base thickness t in the width direction of the outer shell 10. Along the width direction of the outer shell 10, the isolation membrane 20 includes a first isolation membrane 21, which is disposed on the main shell 11 and corresponds to the position of the foamed material with a thickness ≥ 1.5t1. It should be noted that the width direction of the outer shell 10 is also... Figure 2 The front and back directions are shown.

[0053] The number of first isolation membranes 21 is not limited to one; it can be set to two, three, or more depending on actual needs. The first isolation membranes 21 are positioned corresponding to the foamed material with a thickness ≥1.5t1 located on the outer peripheral sidewall of the inner liner 30.

[0054] In one embodiment, the housing 10 further includes a first end cap 12 and a second end cap 13. The first end cap 12 is connected to one end of the main housing 11, and the second end cap 13 is connected to the other end of the main housing 11. The main housing 11, the first end cap 12, and the second end cap 13 can be manufactured separately and then assembled together.

[0055] Please see Figures 4 to 7 For example, the thickness of the foam material between the first end cap 12 and the inner liner 30 is t2, where t2 serves as the base thickness t along the length of the outer shell 10; along the length of the outer shell 10, the separator 20 includes a second separator 22. Optionally, the number of second separators 22 is not limited to one, and can be set to two, three, or more depending on actual needs. The second separator 22 is positioned corresponding to the foam material with a thickness ≥ 1.5t2 located on the axial end face of the inner liner 30.

[0056] It should be noted that the "positional correspondence setting" in the context of the second isolation membrane 22 and the foam material located on the axial end face of the inner liner 30 means that the projection of the foam material located on the axial end face of the inner liner 30 along its thickness direction onto the inner wall of the outer shell 10 overlaps with the second isolation membrane 22 by at least 80% or completely.

[0057] When the insulation device is specifically a water heater, according to the production line structure in related technologies, some parts of the outer shell 10, such as the front wall 101 and the ends of the outer shell 10, are prone to denting and deformation under the tensile force of the foamed material during cooling and contraction. Other parts of the outer shell 10, such as the back of the outer shell 10, have mounting mechanisms that increase structural strength, thus preventing denting and deformation of the back of the outer shell 10 during cooling and contraction. Based on this, for example, the isolation membrane 20 is mainly installed on the parts of the outer shell 10 that are prone to denting and deformation due to the tensile force of the foamed material during cooling and contraction, thereby effectively protecting these areas. It is not necessary for the isolation membrane 20 to be installed over the entire inner wall of the outer shell 10. The smaller area of ​​the isolation membrane 20 reduces material costs and improves installation efficiency. Optionally, the isolation membrane 20 can be installed on, for example, the front wall 101 of the outer shell 10, or on, for example, the ends of the outer shell 10. The specific installation location can be flexibly adjusted and set according to actual needs and is not limited here.

[0058] Of course, as some alternative solutions, the isolation membrane 20 can also be connected to the entire area of ​​the inner wall of the outer shell 10, so as to achieve all-round isolation and protection of the outer shell 10. When the foam material cools and shrinks, no part of the outer shell 10 will be pulled by the foam material and suffer dents or deformation.

[0059] Alternatively, in order to reduce costs, the outer shell 10 is made of a low-strength plate with a yield strength of ≥210MPa, which can reduce the overall cost of the machine and facilitate production and processing.

[0060] The materials used to manufacture the main shell 11 and the first end cap 12 in this application can be independently adjusted and set according to actual needs, including but not limited to metal or plastic materials with low yield strength.

[0061] The first end cap 12 and the main shell 11 are, but are not limited to, an integrated structure, such as welded connection or die casting integral molding, etc.

[0062] Furthermore, the second end cap 13 is detachably connected to the main body shell 11, specifically by means of pins, rivets, screws, or snap-fit ​​connectors. Because the second end cap 13 is detachable from the main body shell 11, the second end cap 13 can be opened to allow for the disassembly and maintenance of the inner liner 30.

[0063] In addition, the insulation device also includes an insulation component 40. The insulation component 40 is disposed inside the outer shell 10 and located between the inner liner 30 and the second end cap 13, and the insulation component 40 is connected to the second end cap 13. The insulation component 40 is in a sealing fit with the inner wall of the main shell 11, and the insulation component 40 also abuts against the end of the inner liner 30. Optionally, the insulation component 40 may be provided with an injection hole 41, for example. Thus, in the assembly process of the insulation device, the inner liner 30 is inserted into the interior of the outer shell 10; then the insulation component 40 is inserted, so that the insulation component 40 abuts against the end of the inner liner 30 and abuts against the inner wall of the main shell 11; then the foaming material is injected into the outer shell 10 through the injection hole 41, and the foaming material specifically fills the area between the insulation component 40 and the first end cap 12, and the foaming material is foamed and molded inside the outer shell 10.

[0064] Since the insulation component 40 has separated the foaming material from the second end cap 13, the second end cap 13 will not be subjected to the tension of the foaming material during the cooling process, and therefore will not dent or deform. Therefore, in this embodiment, there is no need to provide an isolation membrane 20 on the second end cap 13.

[0065] To mount the main shell 11 to the wall, the insulation device also includes a mounting bracket 50. The mounting bracket 50 is connected to the outer ear 10. Specifically, the rear wall 102 of the main shell 11 is connected to the mounting bracket 50, which is used for mounting to the wall. Because the mounting bracket 50 is mounted on the rear wall 102 of the main shell 11, the mounting bracket 50 increases the structural strength of the rear wall 102 of the main shell 11, making it less prone to denting or deformation during the cooling process of the foamed material. Therefore, in this embodiment, an isolation membrane 20 is not required on the rear wall 102 of the main shell 11.

[0066] For example, the insulation component 40 is provided with through holes 42. The through holes 42 are positioned corresponding to the ends of the inner liner 30. For example, the number of through holes 42 is the same as the number of inner liners. Each through hole 42 is provided corresponding to each inner liner 30. On the one hand, electrical components such as control circuit boards connected to the inner liner 30 can be installed in the through holes 42; on the other hand, maintenance work on the inner liner 30 can be performed through the through holes 42, such as replacing the heating rod, which is convenient.

[0067] Please see Figure 2 and Figure 3 Based on the aforementioned embodiments, the isolation membrane 20 includes a first isolation membrane 21 connected to the front wall 101 of the main body shell 11. Thus, the first isolation membrane 21 provides good isolation and protection for the front wall 101 of the main body shell 11, effectively preventing the front wall 101 of the main body shell 11 from denting or deforming during the cooling process of the foamed material.

[0068] Please see Figure 4 and Figure 5Based on the aforementioned embodiments, the isolation membrane 20 includes a second isolation membrane 22 connected to the first end cap 12. Thus, the second isolation membrane 22 provides better isolation and protection for the first end cap 12, effectively preventing the first end cap 12 from denting or deforming during the cooling process of the foamed material.

[0069] For example, the main shell 11 is configured as a cylindrical body, with ports at opposite ends, respectively connected to a first end cap 12 and a second end cap 13. The cross-sectional profile of the main shell 11 along its length direction includes, but is not limited to, a circle, an ellipse, or a polygon, etc., and can be adjusted and set according to the adaptability of the cross-sectional profile of the inner liner 30, as long as it can accommodate the installation of the inner liner 30. In this embodiment, the cross-sectional profile of the main shell 11 along its length direction is elliptical, thus suitable for installing two inner liners 30 with a circular cross-sectional profile along their length direction.

[0070] The number of inner tanks 30 is not limited to one; it can also be two. When there are two inner tanks 30, the insulation device is correspondingly a dual-tank water heater. This embodiment specifically focuses on a dual-tank water heater with two inner tanks 30, but it is not limited to this.

[0071] The two inner liners 30 are arranged side-by-side with a gap between them inside the outer shell 10. Please refer to [link / reference]. Figure 2 The thickness d1 of the foamed material between the front sides of the two inner liner 30 and the front wall 101 varies along the vertical direction. The middle portion of the front wall 101, corresponding to the interval between the two inner liner 30s, has a larger thickness d1, making it prone to denting and deformation defects during the cooling and shrinkage of the foamed material. Therefore, the insulation device also includes a first layered membrane 61 located on the front side of the inner liner 30. The opposite sides of the first layered membrane 61 are respectively connected to the two inner liner 30. The connection method between the first layered membrane 61 and the inner liner 30 includes, but is not limited to, adhesive bonding, electrostatic connection, or snap-fit, etc., and is not limited here. In this way, the first layered membrane 61 can separate and disperse the foamed material between the front sides of the inner liner 30 and the front wall 101, specifically dividing the foamed material in the middle portion of the front wall 101 into two parts, thus minimizing the shrinkage of the front wall 101 during the cooling process of the foamed material.

[0072] Similarly, please see Figure 4The thickness d2 of the foam material between the inner liner 30 and the first end cap 12 differs along the vertical direction. Specifically, the middle portion of the first end cap 12, corresponding to the interval between the two inner liners 30, has a larger foam material thickness d2, making it prone to denting and deformation defects during the cooling and shrinkage of the foam material. Therefore, the insulation device also includes a second layered membrane 62 disposed between the inner liner 30 and the first end cap 12, with its opposite sides connected to each of the two inner liners 30. In this way, the second layered membrane 62 can separate and disperse the foam material between the inner liner 30 and the first end cap 12, specifically dividing the foam material in the middle portion of the first end cap 12 into two parts, thus minimizing the shrinkage of the first end cap 12 during the cooling process.

[0073] It should be noted that the first layered membrane 61, the second layered membrane 62, the first separator membrane 21, and the second separator membrane 22 are each made of the same membrane material or different membrane materials. The specific materials can be flexibly adjusted and set according to actual needs, and are not limited here. The first layered membrane 61, the second layered membrane 62, the first separator membrane 21, and the second separator membrane 22 can be in a bonded state or a discrete state with the foaming material, and are not limited here.

[0074] It should be noted that the shape of the first separating membrane 21 includes, but is not limited to, rectangular, strip-shaped, pentagonal, triangular, circular, elliptical, or irregular shapes, and can be flexibly adjusted and set according to actual needs. Please refer to [link / reference]. Figure 2 and Figure 3 In this embodiment, the first isolation membrane 21 is specifically rectangular, and the length direction of the first isolation membrane 21 is the same as the length direction of the main shell 11. The length of the first isolation membrane 21 is L1, the length of the inner liner 30 is M1, and the length of the outer shell 10 is M2, wherein M1≤L1≤M2.

[0075] Furthermore, the first isolation membrane 21 is disposed in the middle portion of the front wall 101, specifically, for example, symmetrically arranged about the major axis of the outer shell 10. The width of the first isolation membrane 21 can be adjusted and set according to the radius of the inner liner 30 and the distance between the two inner liners 30. Specifically, the radius of the cross-sectional profile of the inner liner 30 along its length is R, the distance between the central axes of the two inner liners 30 is S, and the width of the first isolation membrane 21 is W1, where R ≤ W1 ≤ S.

[0076] Please see Figure 4 and Figure 5For example, the outer periphery of the second isolation membrane 22 is contoured to the outer periphery of the first end cap 12. The ratio of the area of ​​the second isolation membrane 22 to the area of ​​the inner wall surface of the first end cap 12 is, but is not limited to, 0.9 to 1, specifically, for example, 0.9, 0.95, or 1, etc. In this way, the second isolation membrane 22 covers most, or even all, of the inner wall surface of the first end cap 12, providing good protection and isolation for the first end cap 12.

[0077] Of course, optionally, the ratio of the area of ​​the second isolation membrane 22 to the area of ​​the inner wall surface of the first end cap 12 can also be any value less than 0.9.

[0078] For example, the outer periphery of the first end cap 12 is circular or elliptical, and the outer periphery of the second isolation membrane 22 is correspondingly circular or elliptical.

[0079] Please see Figure 6 and Figure 7 , Figure 6 and Figure 7 The second isolation membrane 22 shown is with Figure 4 and Figure 5 The difference with the second isolation membrane 22 shown is that it is not a single membrane, but rather multiple membranes. Specifically, the thickness of the foam material between the first end cap 12 and the inner liner 30 is t2, where t2 serves as the base thickness t along the length of the outer shell 10. Along the length of the outer shell 10, the second isolation membrane 22 is disposed on the first end cap 12, corresponding to the position of the foam material with a thickness ≥ 1.5t2. Thus, the tension acting on the inner wall of the outer shell 10 is greater where the thickness of the foam material exceeds a preset value. Therefore, by placing the second isolation membrane 22 along the thickness direction of the foam material in the projection area on the inner wall of the outer shell 10 at the thicker part, the tension can be reduced, thereby effectively reducing the localized depression deformation of the outer shell 10, improving the flatness of the outer shell 10 surface, and thus effectively improving the product qualification rate. Furthermore, its localized placement on the first end cap 12 saves material and reduces costs.

[0080] It should be noted that the shape of the first layer membrane 61 includes, but is not limited to, a rectangle, strip, pentagon, triangle, circle, ellipse or irregular shape, which can be flexibly adjusted and set according to actual needs.

[0081] Please see Figure 2 In this embodiment, the first layered membrane 61 is specifically rectangular, and its length direction is the same as that of the main shell 11. The length of the first layered membrane 61 is L2, and M1≤L1≤M2. Furthermore, the width of the first layered membrane 61 can be adjusted and set according to the radius of the inner liner 30 and the distance between the two inner liners 30. The width of the first layered membrane 61 is W2, and R≤W2≤S.

[0082] Please see Figure 2 and Figure 3 For example, the first layered film 61 and the first isolation film 21 are arranged opposite to each other in the front-rear direction of the outer shell 10, that is, the first layered film 61 is arranged corresponding to the middle part of the front wall 101, and specifically, for example, is arranged symmetrically about the long axis of the outer shell 10.

[0083] For example, the first layered membrane 61 is the same size and shape as the first separating membrane 21.

[0084] It should be noted that the shape of the second layer membrane 62 includes, but is not limited to, a rectangle, strip, pentagon, triangle, circle, ellipse or irregular shape, which can be flexibly adjusted and set according to actual needs.

[0085] Please see Figure 4 and Figure 8 In this embodiment, the second layered film 62 is specifically rectangular. The side length of the second layered film 62 is set as W3, where R≤W3≤S.

[0086] For example, the insulation component 40 is a foam board, and the density of the insulation component 40 is less than the density of the foam material. Optionally, the density of the insulation component 40 is, for example, 15 kg / m³. 3 Up to 25Kg / M 3 The density of the foamed material is, for example, 45 kg / m³. 3 Up to 55Kg / M 3 Thus, the material hardness of the insulation component 40 is lower than that of the foam material, which provides better cushioning for the foam material and prevents the second end cap 13 from denting or deforming.

[0087] Please see Figure 3 For example, the end of the insulation component 40 closest to the inner liner 30 is provided with an axis aligned with the central axis of the insulation component 40 (e.g., Figure 3 (As shown by the dashed line Z in the diagram) An inclined surface 43 is set at an angle, surrounding the circumference of the insulation component 40. The angle is not limited to, but includes, 30° to 60°, specifically, 30°, 40°, 45°, 50°, or 60°, etc. In this way, during the cooling and shrinkage of the foam material, it can play a stress-relieving role, preventing defects such as dents and deformations in the second end cap 13.

[0088] In one embodiment, this application also provides a water heater, which includes the heat preservation device of any of the above embodiments.

[0089] In the aforementioned water heater, the foamed material is filled between the outer wall of the inner tank 30 and the inner wall of the outer shell 10, providing insulation. When the yield strength of the outer shell 10 is weak, an isolation film 20 can be applied to the entire inner wall of the outer shell 10; when the yield strength of the outer shell 10 is relatively strong, an isolation film 20 can be applied to a portion of the inner wall of the outer shell 10. Because the isolation film 20 is connected to the corresponding inner wall of the outer shell 10, the part connected to the isolation film 20 is separated from the foamed material by the isolation film 20, so that the foamed material and the corresponding inner wall of the outer shell 10 are not bonded together. Thus, the tensile force acting on the corresponding inner wall of the outer shell 10 during the cooling and shrinkage of the foamed material is smaller, thereby effectively reducing the dent deformation of the outer shell 10, improving the flatness of the surface of the outer shell 10, and thus effectively improving the product qualification rate.

[0090] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are 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, and therefore should not be construed as a limitation of this application.

[0091] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] 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 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0093] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0094] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heat preservation device, characterized in that, include: Outer shell (10); An isolation membrane (20) is attached to the inner wall of the outer casing (10); Inner liner (30), the inner liner (30) being disposed within the outer shell (10); and A foaming material is used to fill the space between the outer wall of the inner liner (30) and the inner wall of the outer shell (10).

2. The heat preservation device according to claim 1, characterized in that, The portion of the foamed material whose thickness exceeds a preset value is provided with the isolation membrane (20) in the projection area of ​​the inner wall of the outer shell (10) along its thickness direction.

3. The heat preservation device according to claim 2, characterized in that, The foam material inside the outer shell (10) has a basic thickness, which is set as t. The portion of the foam material with a thickness exceeding 1.5t is provided with the isolation membrane (20) in the projection area of ​​the inner wall of the outer shell (10) along its thickness direction.

4. The heat preservation device according to claim 3, characterized in that, There are two inner liner (30), which are stacked side by side and spaced apart. The outer shell (10) includes a main shell (11). The thickness of the foam material between the top of the inner liner (30) and the top of the outer shell (10) is t1, and t1 is the basic thickness t in the width direction of the outer shell (10). Along the width direction of the outer shell (10), the isolation membrane (20) includes a first isolation membrane (21), which is disposed on the main shell (11) and is disposed corresponding to the position of the foamed material with a thickness ≥1.5t1.

5. The heat preservation device according to claim 4, characterized in that, The insulation device also includes a mounting bracket (50), which is located on the rear side of the main shell (11). The first isolation membrane (21) is located on the front wall of the main shell (11) and is positioned corresponding to the position of the foaming material with a thickness ≥1.5t1.

6. The heat preservation device according to claim 4, characterized in that, The first isolation membrane (21) is rectangular, and the length direction of the first isolation membrane (21) is the same as the length direction of the main shell (11); the length of the first isolation membrane (21) is L1, the length of the inner liner (30) is M1, and the length of the outer shell (10) is M2, wherein M1≤L1≤M2; the cross-sectional radius of the inner liner (30) along the length direction is R, there are two inner liners (30), the two inner liners (30) are arranged side by side with intervals, the distance between the central axes of the two inner liners (30) is S, and the width of the first isolation membrane (21) is W1, wherein R≤W1≤S.

7. The heat preservation device according to claim 4, characterized in that, The outer shell (10) further includes a first end cap (12) and a second end cap (13). The first end cap (12) is connected to one end of the main shell (11), and the second end cap (13) is connected to the other end of the main shell (11). The heat preservation device further includes a heat preservation component (40), which is disposed inside the outer shell (10) and located between the inner liner (30) and the second end cap (13). The heat preservation component (40) is connected to the second end cap (13). The first isolation membrane (21) is connected to the front wall (101) of the main shell (11). The thickness of the foaming material between the first end cap (12) and the inner liner (30) is t2, and t2 serves as the basic thickness t in the length direction of the outer shell (10). Along the length of the outer shell (10), the isolation membrane (20) includes a second isolation membrane (22), which is disposed on the first end cap (12) and is disposed corresponding to the position of the foamed material with a thickness ≥ 1.5t2.

8. The heat preservation device according to claim 4, characterized in that, The outer shell (10) further includes a first end cap (12) and a second end cap (13). The first end cap (12) is connected to one end of the main shell (11), and the second end cap (13) is connected to the other end of the main shell (11). The heat preservation device further includes a heat preservation component (40), which is disposed inside the outer shell (10) and located between the inner liner (30) and the second end cap (13). The heat preservation component (40) is connected to the second end cap (13). The first isolation membrane (21) is connected to the front wall (101) of the main shell (11). Along the length of the outer shell (10), the isolation membrane (20) includes a second isolation membrane (22), the outer periphery of the second isolation membrane (22) is configured to conform to the outer periphery of the first end cap (12), and the ratio of the area of ​​the second isolation membrane (22) to the area of ​​the inner wall of the first end cap (12) is 0.9 to 1.

9. The heat preservation device according to claim 4, characterized in that, The heat preservation device further includes a first layered membrane (61), which is disposed between the outer peripheral sidewall of the inner liner (30) and the inner wall of the outer shell (10), and the opposite sides of the first layered membrane (61) are respectively connected to the two inner liners (30) one by one; and / or, the heat preservation device further includes a second layered membrane (62), which is disposed between the axial end face of the inner liner (30) and the inner wall of the outer shell (10), and the opposite sides of the second layered membrane (62) are respectively connected to the two inner liners (30) one by one; The first layered film (61) is rectangular, and the length direction of the first layered film (61) is the same as the axial direction of the inner liner (30); the length of the first layered film (61) is L2, the length of the inner liner (30) is M1, and the length of the outer shell (10) is M2, wherein M1≤L2≤M2; the cross-sectional radius of the inner liner (30) along the length direction is R, the distance between the central axes of the two inner liners (30) is S, and the width of the first layered film (61) is W2, wherein R≤W2≤S; the second layered film (62) is rectangular, the side length of the second layered film (62) is W3, the cross-sectional radius of the inner liner (30) along the length direction is R, and the distance between the central axes of the two inner liners (30) is S, wherein R≤W3≤S.

10. A water heater, characterized in that, Includes the heat preservation device as described in any one of claims 1-9.

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