Heat preservation device and water heater

Abstract

The application relates to a heat preservation device and a water heater. The heat preservation device comprises a shell, an inner container, foaming material and an inner lining. The shell comprises a main body shell, a first end cover and a second end cover. The first end cover is connected to one end of the main body shell, and the second end cover is connected to the other end of the main body shell. The second end cover is provided with a first foaming hole. The inner container is arranged in the shell. The foaming material is injected into the shell through the first foaming hole and is filled between the outer wall of the inner container and the inner wall of the shell. The inner lining is connected to the inner wall of the main body shell and is away from one end of the second end cover. During the process of injecting the foaming material into the shell, since the inner lining is arranged on the inner wall of the main body shell and is away from one end of the second end cover, the inner lining can enhance the structural strength of the local part of the main body shell, thereby effectively reducing the strong impact force suffered by the local part of the main body shell. In this way, the deformation defect of the end of the main body shell away from the first foaming hole can be effectively prevented, and the appearance quality of the shell is improved.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a heat preservation 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 could 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, in related technologies, especially dual-tank water heaters, the outer shell is prone to 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 deformation defects on the front side of the outer casing away from the injection hole, thereby improving the appearance quality of the outer casing.

[0004] The second technical problem solved by this application is to provide a water heater that can effectively reduce deformation defects on the front side of the outer casing away from the injection hole, thereby improving the appearance quality of the outer casing.

[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] The outer casing includes a main shell, a first end cap, and a second end cap. The first end cap is connected to one end of the main shell, and the second end cap is connected to the other end of the main shell. The second end cap is provided with a first bubble injection hole.

[0008] Inner liner, which is disposed inside the outer shell;

[0009] A foaming material, wherein the foaming material is injected into the outer shell through the first injection hole and fills the space between the outer wall of the inner liner and the inner wall of the outer shell; and

[0010] A liner, which is connected to the inner wall of the main body shell and is located away from one end of the second end cap.

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

[0012] In the aforementioned insulation device, foaming is performed from the second end cap. The foaming material is filled from the first end cap and gradually fills to the second end cap. This results in the highest pressure near the first end cap. Since an inner liner is provided on the inner wall of the main shell at the end away from the second end cap, the inner liner can enhance the structural strength of the local parts of the main shell, thereby effectively reducing the strong impact force on the local parts of the main shell. This can effectively prevent deformation defects from occurring at the end of the main shell away from the first foaming hole and improve the appearance quality of the shell.

[0013] In one embodiment, the liner is a plate made of a material with a yield strength of ≥748MPa.

[0014] In one embodiment, there are two inner liner linings arranged side by side with a gap between them; the main shell includes a front panel, a back panel, and a connecting plate connecting the front panel and the back panel, the connecting plate being an arc-shaped plate, the front panel and the back panel being flat plates, and the liner being disposed on the front panel and / or the back panel.

[0015] In one embodiment, the insulation device further includes a mounting bracket disposed on the back panel and the liner disposed on the front panel.

[0016] In one embodiment, the liner is configured as a rectangular plate;

[0017] Wherein, the width of the inner lining along the arrangement direction of the two inner linings is W1, and the width of the front panel along the arrangement direction of the two inner linings is W2, 0.8≤W1 / W2≤1;

[0018] The length of the inner liner along the central axis of the inner liner is L, where L ≥ 100 mm;

[0019] The thickness of the inner lining is ≥0.3mm.

[0020] In one embodiment, the inner liner includes a first end face disposed opposite to the first end cap and a side wall connected to the first end face; the side of the inner liner away from the first end cap is aligned with the connection position of the side wall and the first end face along its extension direction.

[0021] In one embodiment, the heat preservation device further includes a first isolation membrane connected to the inner wall of the first end cap.

[0022] In one embodiment, the outer periphery of the first isolation membrane is contoured to the outer periphery of the first end cap, and the ratio of the area of ​​the first isolation membrane to the area of ​​the inner wall of the first end cap is 0.9 to 1.

[0023] In one embodiment, there are two inner liner ...

[0024] In one embodiment, the second isolation membrane is rectangular, the side length of the second isolation membrane is W3, the cross-sectional radius of the inner liner along the length direction is R, and the distance between the central axes of the two inner liners is S, wherein R≤W3≤S.

[0025] In one embodiment, the heat preservation device further includes a heat preservation component disposed inside the outer shell and located between the inner liner and the second end cap. The heat preservation component is connected to the second end cap and has a second bubble injection hole, which is correspondingly connected to the first bubble injection hole.

[0026] In one embodiment, the insulation component is a foam board, and the density of the insulation component is less than the density of the foam material.

[0027] The second technical problem mentioned above is solved by the following technical solution:

[0028] On the other hand, this application also provides a water heater, including the aforementioned heat preservation device.

[0029] The water heater described in this application has the following advantages compared to the prior art:

[0030] In the aforementioned water heater, foaming is initiated from the second end cap. The foaming material begins filling from the first end cap and gradually fills to the second end cap. This results in the highest pressure near the first end cap. Since an inner liner is provided on the inner wall of the main shell at the end opposite to the second end cap, the liner enhances the structural strength of local parts of the main shell, thereby effectively reducing the strong impact force on local parts of the main shell. This effectively prevents deformation defects from occurring at the end of the main shell away from the first foaming hole, improving the appearance quality of the shell. Attached Figure Description

[0031] 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.

[0032] 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.

[0033] Figure 1 This is an exploded structural diagram of a heat preservation device according to an embodiment of this application.

[0034] Figure 2 for Figure 1 An exploded view of the insulation device shown from another perspective.

[0035] Figure 3 This is a cross-sectional view of a heat preservation device according to an embodiment of this application.

[0036] Figure 4 This is a cross-sectional view of a heat preservation device according to an embodiment of this application.

[0037] Figure 5 This is a cross-sectional view of a heat preservation device according to another embodiment of this application.

[0038] Figure 6 for Figure 5 The diagram shows the structure of the inner wall of the first end cap of the insulation device.

[0039] Figure 7 for Figure 5 The diagram shows the structure of the inner liner of the heat preservation device, which has a second isolation membrane installed on the first end face.

[0040] Figure label:

[0041] 10. Outer shell; 11. Main shell; 111. Front panel; 112. Back panel; 113. Connecting plate; 12. First end cap; 13. Second end cap; 131. First injection hole; 20. Inner liner; 21. First end face; 22. Side wall; 23. Second end face; 24. Connection position; 30. Liner; 41. Support base; 42. Mounting bracket; 50. Pad; 60. First isolation membrane; 70. Second isolation membrane; 80. Insulation component; 81. Second injection hole; 82. Through hole. Detailed Implementation

[0042] 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.

[0043] As described in related technologies, when the cross-sectional profile of the outer shell along the axial direction of the inner liner is non-circular, the foaming material is prone to causing deformation defects on the front side of the outer shell, particularly at the end furthest from the injection hole, during the foaming process. This problem arises because the outer shell includes a first end and a second end positioned opposite each other, with the second end having an injection hole. During the injection of foaming material into the outer shell through the injection hole, the material flows from the second end to the first end, is blocked by the end face of the first end, and then flows back. This backflow causes a strong impact on the front and back sides of the outer shell, particularly near the first end. Because the back side of the outer shell has supporting components, some of the impact force is offset, preventing deformation defects. However, the front side of the outer shell lacks supporting components, and when impacted by the foaming material, the end furthest from the injection hole on the front side is prone to deformation defects under the strong impact of the foaming material.

[0044] Based on the above reasons, this application provides a heat preservation device that can effectively reduce deformation defects on the front side of the outer shell away from the injection hole, thereby improving the appearance quality of the outer shell.

[0045] It should be noted that, for ease of description and understanding, the terms "front", "back", "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 the front, the direction in which it faces away from the user is the back, and the vertical direction is the up and down direction.

[0046] It should be noted that the end of the outer shell refers to any end of the outer shell along its longitudinal direction, which can be either the left end or the right end of the outer shell.

[0047] See Figure 1 Figure 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.

[0048] In this embodiment, the water heater is an electric water heater, specifically, for example, a dual-tank electric water heater.

[0049] See Figure 1An embodiment of this application provides a heat-insulating device, comprising: an outer shell 10, an inner liner 20, foaming material, and a liner 30. The outer shell 10 includes a main shell 11, 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 second end cap 13 has a first foam injection hole 131. The inner liner 20 is disposed inside the outer shell 10. The foaming material is injected into the outer shell 10 through the first foam injection hole 131 and fills the space between the outer wall of the inner liner 20 and the inner wall of the outer shell 10, thus providing heat insulation. The liner 30 is connected to the inner wall of the main shell 11 and faces away from one end of the second end cap 13.

[0050] In the aforementioned insulation device, during foam injection, foam is injected from the second end cap 13. The foaming material is filled from the first end cap 12 and gradually fills to the second end cap 13. In this way, the pressure is greatest near the first end cap 12. Since an inner liner 30 is provided on the inner wall of the main body shell 11 and away from the second end cap 13, the inner liner 30 can enhance the structural strength of the local parts of the main body shell 11, thereby effectively reducing the strong impact force on the local parts of the main body shell 11. This can effectively prevent deformation defects from occurring at the end of the main body shell 11 away from the first foam injection hole 131 and improve the appearance quality of the outer shell 10.

[0051] For example, the main body shell 11 includes a front panel 111. Taking the insulation device installed on a wall as an example, the front panel 111 refers to the side panel of the main body shell 11 facing away from the wall, that is, the side panel of the main body shell 11 facing the user. The main body shell 11 also includes a back panel 112 disposed opposite to the front panel 111. The back panel 112 refers to the side panel of the main body shell 11 facing the wall, that is, the side panel of the main body shell 11 facing away from the user. An inner liner 30 is disposed on the front panel 111 and / or the back panel 112. In this way, the inner liner 30 can enhance the structural strength of local parts of the front panel 111 and / or the back panel 112, thereby effectively reducing the strong impact force on local parts of the front panel 111 and / or the back panel 112. This can effectively prevent deformation defects from occurring on the front side of the shell 10 away from the injection hole, and improve the appearance quality of the shell 10.

[0052] Based on the aforementioned embodiments, the insulation device further includes a mounting bracket 42. The mounting bracket 42 is disposed on the back panel 112, and the inner lining 30 is correspondingly disposed on the front panel 111.

[0053] Please see Figure 1 and Figure 2For example, the insulation device also includes a support base 41, a mounting bracket 42, and a locking member. The support base 41 is located inside the outer shell 10 and fixed to the inner liner 20, while the mounting bracket 42 is located outside the outer shell 10 and is used for mounting on a wall. The locking member penetrates the outer shell 10 and connects and fixes the support base 41 and the mounting bracket 42. Specifically, the locking member penetrates the back panel 112 and connects the support base 41 and the mounting bracket 42. Since the back panel 112 is clamped between the support base 41 and the mounting bracket 42, the structural strength of the back panel 112 is enhanced, making it less prone to denting and deformation during the cooling process of the foamed material. Therefore, in this embodiment, there is no need to provide an isolation membrane on the back panel 112.

[0054] The support base 41 can be one, two, three, or any other arbitrary number. Each inner liner 20 is connected and fixed to the support base 41. The number of support bases 41 may be the same as or different from the number of mounting brackets 42. In this embodiment, there are, for example, two support bases 41 and two mounting brackets 42, with each mounting bracket 42 corresponding to one of the two support bases 41 and fixed in a one-to-one manner.

[0055] The locking components include, but are not limited to, screws, bolts, pins, or rivets.

[0056] Please see Figure 2 For example, the insulation device also includes a pad 50. The pad 50 is connected between the inner liner 20 and the outer shell 10. The inner liner 20 is provided with a water tap, and the pad 50 is provided with a mounting hole corresponding to the water tap. The water tap passes through the mounting hole. The pad 50 is made of, but is not limited to, foam material.

[0057] 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.

[0058] For example, the main body shell 11, the first end cap 12 and the second end cap 13 can be manufactured separately according to actual needs, and then assembled together.

[0059] It should be noted that the materials used to manufacture the main body shell 11, the first end cap 12, and the second end cap 13 in this embodiment can be independently adjusted and set according to actual needs, and include, but are not limited to, metal materials or plastic materials with low yield strength.

[0060] 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.

[0061] 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 detachably connected to the main body shell 11, the second end cap 13 can be opened to allow for the disassembly and assembly of the inner liner 20 and subsequent maintenance.

[0062] 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 longitudinal direction includes, but is not limited to, a circle, an ellipse, or a polygon, etc., and can be adjusted and set according to the cross-sectional profile of the inner liner 20, as long as it can accommodate the installation of the inner liner 20. In this embodiment, the cross-sectional profile of the main shell 11 along its longitudinal direction is elliptical, thus suitable for installing at least two inner liners 20 with a circular cross-sectional profile along their longitudinal direction.

[0063] The number of inner tanks 20 is not limited to one; it can also be two. When there are two inner tanks 20, they are arranged side by side with intervals, and the insulation device is a dual-tank water heater. This embodiment specifically focuses on a dual-tank water heater with two inner tanks 20, but it is not limited to this.

[0064] Please see Figure 1 and Figure 2 For example, the inner liner 30 is a plate made of a material with a yield strength of ≥748MPa. With this configuration, the inner liner 30 has a high structural strength. After being connected and combined with the inner wall of the front panel 111 and the end opposite to the second end cap 13, it can enhance the structural strength of the local part of the front panel 111 and effectively prevent deformation defects from occurring on the front side of the outer shell 10 away from the injection hole.

[0065] For example, the lining 30 is, but is not limited to, being fixedly connected to the inner wall of the front panel 111 by various means such as bonding, snap-fitting or welding.

[0066] Please see Figure 1 and Figure 3 In order to show the positional relationship between the inner lining 30, the inner liner 20, and the outer shell 10, Figure 3 The inner lining component 30 is illustrated using a dashed box, but this is for illustrative purposes only and should not be construed as limiting the specific position or shape of the inner lining component 30. For example, the inner lining component 30 may be, but is not limited to, a rectangular plate, a circular plate, or other regular or irregular shapes, and can be flexibly adjusted and set according to actual needs.

[0067] In a specific example, please refer to Figure 1 and Figure 3The front panel 111 is a flat plate, and the inner lining 30 is a rectangular plate. This facilitates the fitting and fixing of the inner lining 30 to the inner wall of the front panel 111, making assembly easier. The width of the inner lining 30 along the arrangement direction of the two inner linings 20 is W1, and the width of the front panel 111 along the arrangement direction of the two inner linings 20 is W2, where 0.8 ≤ W1 / W2 ≤ 1.

[0068] Specifically, in this embodiment, W1 = W2. That is, the inner liner 30 extends from one edge of the front panel 111 to the other edge along the arrangement direction of the two inner liner 20.

[0069] In one embodiment, the distance between the central axes of the two inner liner 20 is equal to W2, therefore, the distance between the central axes of the two inner liner 20 is equal to W1.

[0070] Furthermore, the length of the inner liner 30 along the central axis Z direction of the inner liner 20 is L, where L ≥ 100 mm. The thickness of the inner liner 30 is ≥ 0.3 mm. Thus, the relatively large length L of the inner liner 30 provides a larger coverage area, offering better protection for the front panel 111. Additionally, the relatively large thickness of the inner liner 30 results in greater structural strength and stronger impact resistance.

[0071] Please see Figure 1 and Figure 2 In one embodiment, the main body shell 11 further includes two connecting plates 113. The opposite side edges of the front panel 111 are respectively connected to the opposite side edges of the back panel 112 through the two connecting plates 113. The connecting plates 113 include, but are not limited to, curved plates. The back panel 112, the front panel 111, and the two connecting plates 113 form the main body shell 11.

[0072] Please see Figure 3 For example, the inner liner 20 includes a first end face 21 disposed opposite to the first end cap 12 and a side wall 22 connected to the first end face 21. The inner liner 20 also includes a second end face 23 disposed opposite to the second end cap 13. The second end face 23 is connected to the side wall 22. The side edge of the inner liner 30 away from the first end cap 12 is aligned with the connection position 24 of the side wall 22 and the first end face 21 along its extending direction. In this way, on the one hand, the length L of the inner liner 30 is relatively large, which can effectively protect the parts of the front panel 111 that are subjected to greater impact force; on the other hand, the length L of the inner liner 30 is not too large, which would lead to material waste.

[0073] Please see Figures 5 to 7For example, the insulation device also includes a first isolation membrane 60. The first isolation membrane 60 is connected to the inner wall of the first end cap 12. Thus, the portion of the first end cap 12 connected to the first isolation membrane 60 is separated from the foaming material by the first isolation membrane 60. That is, the foaming material and the portion of the first end cap 12 connected to the first isolation membrane 60 are not connected to each other. Consequently, the tensile force acting on the inner wall of the corresponding first end cap 12 during the cooling and shrinkage of the foaming material is smaller, thereby effectively reducing the concave deformation of the first end cap 12 and improving the flatness of the surface of the first end cap 12.

[0074] For example, the first isolation membrane 60 is fixed to the inner wall of the first end cap 12 by various means, including but not limited to adhesive bonding, electrostatic connection or snap-fit.

[0075] Please see Figure 5 and Figure 6 For example, the outer periphery of the first isolation membrane 60 is contoured to the outer periphery of the first end cap 12. The ratio of the area of ​​the first isolation membrane 60 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 first isolation membrane 60 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.

[0076] Of course, optionally, the ratio of the area of ​​the first isolation membrane 60 to the area of ​​the inner wall of the first end cap 12 can be any value less than 0.9.

[0077] For example, the outer periphery of the first end cap 12 is circular or elliptical, and the outer periphery of the first separator 60 is correspondingly circular or elliptical.

[0078] Of course, as some alternative solutions, when the yield strength of the outer shell 10 is weak, the entire inner wall of the outer shell 10 can be covered with an isolation film; when the yield strength of the outer shell 10 is relatively strong, the inner wall of the outer shell 10 can be covered with an isolation film on a portion of the inner wall.

[0079] The device includes, for example, two inner liner 20s arranged side-by-side with a gap between them. The two inner liner 20s are connected, for example, by at least one pipe fitting, to achieve mutual communication. The thickness d of the foamed material between the axial end face of the inner liner 20 and the inner wall of the outer shell 10 differs along the arrangement direction of the two inner liner 20s. Specifically, the thickness d of the foamed material in the gap region between the two inner liner 20s is larger, and the area opposite the gap region between the outer shell 10 and the two inner liner 20s is prone to denting and deformation defects during the cooling and shrinkage of the foamed material. Therefore, the insulation device in this embodiment also includes a second isolation membrane 70. The second isolation membrane 70 is disposed between the axial end face of the inner liner 20 and the inner wall of the outer shell 10, and its opposite sides are respectively connected to the two inner liner 20 one-to-one.

[0080] Please see Figures 1 to 5 In any embodiment, the insulation device also includes an insulation element 80, which is disposed within the outer shell 10 and located between the inner liner 20 and the second end cap 13. The insulation element 80 is connected to the second end cap 13. Because the second end cap 13 is connected to the insulation element 80, the insulation element 80 can isolate the second end cap 13 from the foaming material, thereby effectively preventing deformation defects in the second end cap 13. However, the axial end face between the first end cap 12 and the inner liner 20 is easily affected by interference from the foaming material because the insulation element 80 is not provided. Therefore, in this embodiment, the second separating membrane is specifically disposed, for example, between the axial end face of the inner liner 20 and the first end cap 12. Furthermore, the second separating membrane 70 can separate and disperse the foaming material between the inner liner 20 and the first end cap 12. Specifically, the second separating membrane 70 separates and disperses the foaming material at the middle part of the first end cap 12 into two parts, thereby minimizing the shrinkage of the first end cap 12 during the cooling process of the foaming material.

[0081] It should be noted that the shape of the second isolation membrane 70 includes, but is not limited to, a rectangle, strip, pentagon, triangle, circle, ellipse or irregular shape, and can be flexibly adjusted and set according to actual needs.

[0082] Please see Figure 5 and Figure 7 In one specific embodiment, the second isolation membrane 70 is specifically rectangular. The side length of the second isolation membrane 70 is set to W3, the cross-sectional radius of the inner liner 20 along the length direction is R, and the distance between the central axes Z of the two inner liners 20 is S, where R≤W3≤S.

[0083] For example, the first separator 60 and the second separator 70 may be made of the same or different membrane materials, which can be flexibly adjusted and set according to actual needs, and are not limited here. The first separator 60 and the second separator 70 may be in a bonded state or a discrete state with the foaming material, and are not limited here.

[0084] Please see Figure 4 For example, the insulation component 80 is provided with a second bubble injection hole 81, which is connected to the first bubble injection hole 131.

[0085] For example, the insulation component 80 is sealed to the inner wall of the main shell 11, and the insulation component 80 also seals against the end of the inner liner 20. In the assembly process of the insulation device, the inner liner 20 is installed into the outer shell 10; then the insulation component 80 is installed, so that the insulation component 80 abuts against the end of the inner liner 20 and seals against the inner wall of the main shell 11; then the foaming material is injected into the outer shell 10 through the first injection hole 131 and the second injection hole 81 in sequence, and the foaming material specifically fills the area between the insulation component 80 and the first end cap 12, and the foaming material is foamed and molded inside the outer shell 10.

[0086] Since the insulation component 80 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. Thus, in this embodiment, there is no need to provide an isolation membrane on the second end cap 13.

[0087] Please see Figure 1 and Figure 2 For example, the insulation component 80 is provided with through holes 82. The through holes 82 are positioned corresponding to the ends of the inner liner 20. For example, the number of through holes 82 is the same as the number of inner liners 20. Each through hole 82 is provided corresponding to each inner liner 20. On the one hand, electrical components such as control circuit boards connected to the inner liner 20 can be installed in the through holes 82; on the other hand, maintenance work on the inner liner 20 can be performed through the through holes 82, such as replacing the heating rod, which is convenient.

[0088] For example, the insulation component 80 is a foam board, and the density of the insulation component 80 is less than the density of the foam material. Optionally, the density of the insulation component 80 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 80 is lower than that of the foam material, which provides a better buffering effect for the foam material and can prevent the second end cap 13 from denting or deforming.

[0089] In one embodiment, this application also provides a water heater including the heat preservation device of any of the above embodiments.

[0090] In the aforementioned water heater, during foam injection, foam is injected from the second end cap 13. The foaming material is filled from the first end cap 12 and gradually fills to the second end cap 13. In this way, the pressure is greatest near the first end cap 12. Since an inner liner 30 is provided on the inner wall of the main body shell 11 and away from the second end cap 13, the inner liner 30 can enhance the structural strength of the local parts of the main body shell 11, thereby effectively reducing the strong impact force on the local parts of the main body shell 11. This can effectively prevent deformation defects from appearing at the end of the main body shell 11 away from the first foam injection hole 131 and improve the appearance quality of the shell 10.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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: The outer shell (10) includes a main shell (11), 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 second end cap (13) is provided with a first bubble injection hole (131). Inner liner (20), the inner liner (20) is disposed inside the outer shell (10); Foaming material, which is injected into the outer shell (10) through the first injection hole (131) and fills the space between the outer wall of the inner liner (20) and the inner wall of the outer shell (10); and The inner liner (30) is connected to the inner wall of the main body shell (11) and is located away from one end of the second end cap (13).

2. The heat preservation device according to claim 1, characterized in that, The inner lining (30) is a plate made of a material with a yield strength of ≥748MPa.

3. The heat preservation device according to claim 1, characterized in that, There are two inner liner (20), which are arranged side by side with a gap between them; the main shell (11) includes a front panel (111), a back panel (112) and a connecting plate (113) connecting the front panel (111) and the back panel (112), the connecting plate (113) is an arc-shaped plate, the front panel (111) and the back panel (112) are flat plates, and the inner liner (30) is disposed on the front panel (111) and / or the back panel (112).

4. The heat preservation device according to claim 3, characterized in that, The heat preservation device also includes a mounting bracket (42), which is disposed on the back panel (112), and the inner lining (30) is disposed on the front panel (111).

5. The heat preservation device according to claim 4, characterized in that, The inner lining (30) is configured as a rectangular plate; Wherein, the width of the inner lining (30) along the arrangement direction of the two inner linings (20) is W1, and the width of the front panel (111) along the arrangement direction of the two inner linings (20) is W2, 0.8≤W1 / W2≤1; The length of the inner liner (30) along the central axis of the inner liner (20) is L, where L ≥ 100 mm; The thickness of the inner liner (30) is ≥0.3mm.

6. The heat preservation device according to claim 3, characterized in that, The inner liner (20) includes a first end face (21) disposed opposite to the first end cap (12) and a side wall (22) connected to the first end face (21); the inner liner (30) is aligned with the connection position (24) of the side wall (22) and the first end face (21) along its extension direction on the side away from the first end cap (12).

7. The heat preservation device according to claim 1, characterized in that, The heat preservation device also includes a second isolation membrane (70), which is disposed between the axial end face of the inner liner (20) and the inner wall of the outer shell (10). The two opposite sides of the second isolation membrane (70) are respectively connected to the two inner liners (20) one by one.

8. The heat preservation device according to claim 7, characterized in that, The second isolation membrane (70) is rectangular, the side length of the second isolation membrane (70) is set to W3, the cross-sectional contour radius of the inner liner (20) along the length direction is R, and the distance between the central axes of the two inner liners (20) is S, wherein R≤W3≤S.

9. The heat preservation device according to claim 1, characterized in that, The heat preservation device further includes a heat preservation component (80), which is disposed inside the outer shell (10) and located between the inner liner (20) and the second end cap (13). The heat preservation component (80) is connected to the second end cap (13), and the heat preservation component (80) is provided with a second bubble injection hole (81), which is correspondingly connected to the first bubble injection hole (131).

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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