Vehicle-mounted refrigerator with ultrathin heat preservation layer

Abstract

The utility model belongs to the technical field of vehicle-mounted refrigerators, and particularly relates to a vehicle-mounted refrigerator with an ultrathin heat preservation layer. A thin-wall inner container is fixed in the thin-wall outer layer, a sealing port is formed in an upper port of the thin-wall outer layer, the sealing port is connected with the thin-wall outer layer and the thin-wall inner container in a welded mode, a hollow cavity is formed between the thin-wall outer layer and the thin-wall inner container, and an integrated evaporation coil is wound on the outer surface of the thin-wall inner container. The radiation shielding heat insulation layer and the evaporation coil are fused together, a layer of vacuum supporting component is arranged on the outer side of the radiation shielding heat insulation layer, the vacuum supporting component and the thin-wall inner container are kept in sealed connection, vacuum treatment is conducted on the interior of the vacuum supporting component, and the radiation shielding heat insulation layer is located in a vacuum environment. The heat preservation layer in the vehicle-mounted refrigerator is improved by combining the ultralow-temperature heat transfer technology with the ultra-thin heat insulation material, the problem that the heat insulation layer is large in thickness or fails is solved, and the effective volume, energy efficiency and reliability of the refrigerator are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle-mounted refrigerators, and particularly relates to a vehicle-mounted refrigerator with an ultra-thin thermal insulation layer. Background Art

[0002] In the existing vehicle-mounted refrigerator market, heat-insulating materials are generally used for heat insulation of the refrigerator body. There are problems of failure / thickness of the heat-insulating materials. When the heat-insulating materials fail, it will cause cold conduction, condensation water generation / energy efficiency improvement of the refrigerator, etc., thus restricting the refrigeration temperature range of the refrigerator.

[0003] With the improvement of market demand, vehicle-mounted refrigerators are gradually developing towards lower temperatures. Along with the need to increase the thickness of the heat-insulating materials to achieve heat insulation, the effective volume inside the refrigerator will be greatly reduced under the condition of a certain appearance size.

[0004] Low-temperature heat insulation is generally divided into two major types: non-vacuum heat insulation and vacuum heat insulation.

[0005] Non-vacuum heat insulation is also called ordinary packed heat insulation, that is, a certain thickness of heat-insulating materials is filled or wrapped on the surface to be insulated to achieve the purpose of heat insulation. The temperature range of use is -20°C to 110°C. Common products include household refrigerators, vehicle-mounted refrigerators, chillers, etc. The packed heat insulation method is simple and inexpensive, but the heat insulation efficiency is low.

[0006] Vacuum heat insulation is further divided into types such as high-vacuum heat insulation, vacuum porous heat insulation, multi-layer heat insulation, and multi-screen heat insulation. Generally, it is required that the vacuum degree in the closed space (interlayer) to be insulated is maintained below 0.01 Pa, so that convective heat transfer and most of the gas heat conduction can be eliminated. Thus, the heat flow entering the low-temperature part is mainly thermal radiation, followed by a small amount of residual gas heat conduction, and the heat conduction of solid components. The structure of high-vacuum heat insulation is simple, with light weight and small heat capacity. The temperature range of use is -200°C to 200°C. Therefore, it is widely used in test equipment for liquid nitrogen, liquid oxygen, liquid air, and liquid argon. However, it is relatively difficult to obtain and maintain high-vacuum heat insulation. The common application fields are military, aerospace, medical industries, etc.

[0007] Therefore, it is necessary to invent a vehicle-mounted refrigerator with an ultra-thin thermal insulation layer to help reduce the refrigeration temperature range of the refrigerator and make the thermal insulation layer thinner. Content of the Utility Model

[0008] To solve the defects and deficiencies of the existing technology; the purpose of the utility model is to provide a vehicle-mounted refrigerator with an ultra-thin thermal insulation layer, which has a simple structure, reasonable design and convenient use. It combines ultra-low temperature heat transfer technology with ultra-thin heat-insulating materials to improve the thermal insulation layer inside the vehicle-mounted refrigerator, solves the problems of large thickness or failure of the heat-insulating layer, and improves the effective volume, energy efficiency and reliability of the refrigerator.

[0009] To achieve the above object, the technical solution adopted by the present utility model is as follows: It includes a bottom plate, a thin-walled outer layer, a thin-walled inner container, a sealing port, an evaporation coil, a shielding radiation adiabatic insulation layer, and a vacuum support member; the thin-walled outer layer is welded to the bottom plate, and a thin-walled inner container is fixed inside the thin-walled outer layer. A sealing port is provided at the upper port of the thin-walled outer layer, and the sealing port is connected to the thin-walled outer layer and the thin-walled inner container by welding, so as to form a hollow cavity between the thin-walled outer layer and the thin-walled inner container. An integrated evaporation coil is wound around the outer surface of the thin-walled inner container, and a shielding radiation adiabatic insulation layer is attached to the surface of the thin-walled inner container. The shielding radiation adiabatic insulation layer is integrated with the evaporation coil. A layer of vacuum support member is provided outside the shielding radiation adiabatic insulation layer. The vacuum support member is hermetically connected to the thin-walled inner container and is evacuated inside, so that the shielding radiation adiabatic insulation layer is in a vacuum environment.

[0010] Preferably, the shielding radiation adiabatic insulation layer is composed of a reflection shielding layer and a spacer layer. The reflection shielding layer and the spacer layer are alternately covered and laminated by sewing threads, and the outer layer is wrapped and wound with polyester ropes to bundle and fix the shielding radiation adiabatic insulation layer and the thin-walled inner container.

[0011] Preferably, the thickness of the vacuum support member 7 is maintained at 0.1 - 0.6 mm, and the internal vacuum pressure is less than 0.01 Pa.

[0012] Preferably, the thickness of the thin-walled outer layer is maintained at 1 - 2 mm, and the thickness of the thin-walled inner container is maintained at 0.6 - 1.2 mm.

[0013] Preferably, the shielding radiation adiabatic insulation layer is attached to the thin-walled inner container, and the shielding radiation adiabatic insulation layer is separated from the vacuum support member.

[0014] After adopting the above structure, the beneficial effects of the present utility model are as follows: It combines ultra-low temperature heat transfer technology with ultra-thin adiabatic materials to improve the insulation layer inside the vehicle-mounted refrigerator, solves the problems of large thickness or failure of the adiabatic layer, and improves the effective volume, energy efficiency, and reliability of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the present utility model will be described in detail by the following specific embodiments and the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the present utility model;

[0017] Figure 2 It is a three-dimensional exploded schematic diagram of the present utility model;

[0018] Figure 3 It is a control diagram of the ultra-low temperature heat transfer experiment of the present utility model;

[0019] Description of reference numerals: bottom plate 1, thin-walled outer layer 2, thin-walled inner tank 3, sealed port 4, evaporation coil 5, shielding radiation adiabatic insulation layer 6, vacuum support member 7. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0021] Here, it should also be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.

[0022] Refer to Figure 1 、 Figure 2 As shown, the following technical solutions are adopted in this detailed implementation manner: It includes a bottom plate 1, a thin-walled outer layer 2, a thin-walled inner tank 3, a sealed port 4, an evaporation coil 5, a shielding radiation adiabatic insulation layer 6, and a vacuum support member 7; the thin-walled outer layer 2 is welded to the bottom plate 1, and a thin-walled inner tank 3 is fixed inside the thin-walled outer layer 1, and a sealed port 4 is provided at the upper port of the thin-walled outer layer 2. The sealed port 4 is connected to the thin-walled outer layer 2 and the thin-walled inner tank 3 by welding, so that a hollow cavity is formed between the thin-walled outer layer 2 and the thin-walled inner tank 3. An integrated evaporation coil 5 is wound around the outer surface of the thin-walled inner tank 3, and a shielding radiation adiabatic insulation layer 6 is attached to the surface of the thin-walled inner tank 2. The shielding radiation adiabatic insulation layer 6 is integrated with the evaporation coil 5. A layer of vacuum support member 7 is provided outside the shielding radiation adiabatic insulation layer 6. The vacuum support member 7 is hermetically connected to the thin-walled inner tank 2 and the inside is evacuated, so that the shielding radiation adiabatic insulation layer 5 is in a vacuum environment.

[0023] Among them, the shielding radiation adiabatic insulation layer 6 is composed of a reflective shielding layer and a spacer layer. The reflective shielding layer and the spacer layer are alternately covered and laminated by sewing threads. The outer layer is wrapped and wound with polyester ropes to bundle and fix the shielding radiation adiabatic insulation layer 6 and the thin-walled inner tank 3. The reflective shielding layer uses a double-sided aluminized polyester film with a unit area mass of 15 g / m 2 , and the spacer layer is made of a heat-set polyester mesh with a unit area mass of 10 g / m 2 .

[0024] In addition, the thickness of the vacuum support member 7 is maintained at 0.1 - 0.6 mm, and the internal vacuum air pressure is less than 0.01 Pa; the thickness of the thin-walled outer layer 2 is maintained at 1 - 2 mm, and the thickness of the thin-walled inner liner 3 is maintained at 0.6 - 1.2 mm; the shielding radiation heat insulation layer 6 is attached to the thin-walled inner liner 3, and the shielding radiation heat insulation layer 6 is kept separated from the vacuum support member 7.

[0025] Furthermore, the joints between the bottom plate 1, the thin-walled outer layer 2, the thin-walled inner liner 3, and the sealing port 4 are all sealed and fixedly connected by welding; the evaporation coil 5 is inserted into the reserved hole at the upper end of the thin-walled outer layer 2, and the joint is sealed and fixed by welding.

[0026] The working principle of this specific embodiment is as follows: Refer to Figure 3 , when the pressure is better than 0.01 Pa, the change in the equivalent thermal conductivity approaches zero; when the pressure is between 10 - 100 Pa, the free conduction of gas molecules is dominant; the equivalent thermal conductivity increases rapidly; when the pressure is greater than 100 Pa, the influence of the change in vacuum degree on the thermal conductivity becomes smaller.

[0027] The present utility model combines the ultra-low temperature heat transfer technology with the cooperation of ultra-thin heat insulation materials to improve the heat insulation layer inside the vehicle-mounted refrigerator, solves the problems of large thickness or failure of the heat insulation layer, and improves the effective volume, energy efficiency, and reliability of the refrigerator.

[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An in-vehicle refrigerator with an ultra-thin thermal insulation layer, characterized in that: It includes a bottom plate, a thin-walled outer layer, a thin-walled inner container, a sealing port, an evaporation coil, a shielding radiation adiabatic insulation layer, and a vacuum support member; the thin-walled outer layer is welded to the bottom plate, and a thin-walled inner container is fixed inside the thin-walled outer layer. A sealing port is provided at the upper port of the thin-walled outer layer. The sealing port is connected to the thin-walled outer layer and the thin-walled inner container by welding, so as to form a hollow cavity between the thin-walled outer layer and the thin-walled inner container. An integral evaporation coil is wound on the outer surface of the thin-walled inner container, and a shielding radiation adiabatic insulation layer is attached to the surface of the thin-walled inner container. The shielding radiation adiabatic insulation layer is integrated with the evaporation coil. A layer of vacuum support member is provided outside the shielding radiation adiabatic insulation layer. The vacuum support member is hermetically connected to the thin-walled inner container and the inside is vacuum-treated, so that the shielding radiation adiabatic insulation layer is in a vacuum environment.

2. The vehicle-mounted refrigerator with an ultra-thin thermal insulation layer according to claim 1, wherein: The shielding radiation adiabatic insulation layer is composed of a reflection shielding layer and a spacer layer. The reflection shielding layer and the spacer layer are alternately covered and laminated by stitching threads. The outer layer is wrapped and wound with polyester ropes to bundle and fix the shielding radiation adiabatic insulation layer and the thin-walled inner container.

3. The vehicle-mounted refrigerator with an ultra-thin thermal insulation layer according to claim 1, characterized in that: The thickness of the vacuum support member is maintained at 0.1 - 0.6 mm, and the internal vacuum pressure is less than 0.01 Pa.

4. The vehicle-mounted refrigerator with an ultra-thin thermal insulation layer according to claim 1, characterized in that: The thickness of the thin-walled outer layer is maintained at 1 - 2 mm, and the thickness of the thin-walled inner container is maintained at 0.6 - 1.2 mm.

5. The vehicle-mounted refrigerator with an ultra-thin thermal insulation layer according to claim 2, characterized in that: The shielding radiation adiabatic insulation layer is attached to the thin-walled inner container, and the shielding radiation adiabatic insulation layer is separated from the vacuum support member.

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