Vacuum and heat insulation integrated door

Abstract

The utility model discloses a vacuum heat-insulation integrated door, which comprises a concave shell, a sealing element, a core material, a frame and a high-barrier film, the frame is positioned in the concave shell, the high-barrier film covers the frame, the core material is arranged in a vacuum cavity formed by the high-barrier film, the frame and the concave shell, and the sealing element is positioned between the frame and the concave shell. According to the refrigerator, the energy consumption of the whole refrigerator can be obviously reduced, the possible condensation phenomenon is avoided, and the door body is thinner than the door body in the prior art under the same heat preservation effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigerator door structure technical field especially is a kind of vacuum heat insulation integrated door. BACKGROUND

[0002] Vacuum insulation panel (Vacuum Insulation Panel, alias: VIP board) is a kind of vacuum heat preservation material, is by filling core material and vacuum protection surface layer composite, it effectively avoids the heat transfer caused by air convection, so heat transfer coefficient can greatly reduce, can reach 0.002-0.004w / m.k, it is 1 / 10 of the heat transfer coefficient of traditional thermal insulation material. The heat transfer coefficient of vacuum heat insulation board of glass fiber core material is lower, mainly applied to refrigerator, freezer, energy-saving insulation of refrigerator car.

[0003] The existing refrigerator door adopts the combined structure of PU (polyurethane foam) and VIP board (vacuum insulation board), that is, a VIP board is attached to the inner surface of the refrigerator door body, and PU is injected to fill the gap, so that a refrigerator door body containing VIP can be obtained. This design is mainly to improve the heat preservation performance of the refrigerator, while minimizing the thickness of the door body. However, this combined structure also has some potential drawbacks, which leads to the increase of the energy consumption of the refrigerator and the possible condensation phenomenon of the refrigerator door body.

[0004] As shown in Figure 1 , it is a bag type VIP-PU foaming refrigerator door, the box body 91 and the door body 93 are connected through the door seal 92, wherein the door body 93 is composed of PU material 931 and VIP board 932, there are mainly four heat transfer paths, T1 at the door seal 92, T2 at the VIP board 932, T3 at the joint of PU material 931 and VIP board 932, and T4 at the PU material 931. Among them, T3 and T4, due to the limitation of the poor heat insulation performance of PU material 931 itself, the heat transfer is more serious, and the condensation phenomenon is more likely to occur, which requires more energy consumption of the refrigerator to maintain the constant temperature in the refrigerator cavity.

[0005] Therefore, the present inventors have made further research and developed a vacuum heat insulation integrated door, which gives rise to the present case. CONTENT OF THE UTILITY MODEL

[0006] The technical problem to be solved by the utility model is to provide a vacuum heat insulation integrated door, which can not only significantly reduce the energy consumption of the refrigerator and avoid the possible condensation phenomenon, but also has a thinner door body thickness than the prior art under the same heat preservation effect.

[0007] To solve the above technical problems, the technical solution of the utility model is:

[0008] A vacuum-insulated integrated door includes a concave outer shell, a seal, a core material, a frame, and a high-barrier film. The frame is located within the concave outer shell, the high-barrier film covers the frame, the core material is placed within the vacuum cavity formed by the high-barrier film, the frame, and the concave outer shell, and the seal is located between the frame and the concave outer shell.

[0009] Further, the seal is a low-temperature metal solder or a polymer sealing material.

[0010] Further, it also includes an air extraction and diversion workpiece, which is built into the core material.

[0011] Further, the concave outer shell is made by stamping sheet metal technology.

[0012] Further, a polyethylene coating is laminated on the surface of the frame, and the polyethylene coating is heat-sealed and bonded to the concave outer shell and the high-barrier film respectively.

[0013] Further, the bottom of the frame has an extension part, which covers the concave outer shell and extends towards the inner wall direction of the concave outer shell.

[0014] Further, when viewed from the top-down direction, the frame is in a double-square shape.

[0015] Further, the frame is a plastic frame, a metal frame, or a gas high-barrier material frame.

[0016] Further, it also includes a punched vacuum patch, which covers the air extraction hole of the vacuum cavity.

[0017] Further, it also includes a protective film, which covers the high-barrier film and is connected to the concave outer shell.

[0018] After adopting the above solution, the present utility model has the following advantages:

[0019] 1. Using all-VIP as the thermal insulation material, the thermal insulation performance is better;

[0020] 2. Using all-VIP as the thermal insulation material, when applying this product to the refrigerator door, the overall energy consumption of the refrigerator can be lower;

[0021] 3. Using all-VIP as the thermal insulation material, removing the PU foam material, compared with the prior art, only a thinner door body thickness can achieve the same thermal insulation effect for the refrigerator, which helps to make the refrigerator thinner and lighter. With the same outer dimensions of the refrigerator, a larger storage space can be obtained. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the heat transfer distribution of the existing refrigerator door body during operation;

[0023] Figure 2 It is an exploded view of the present utility model;

[0024] Figure 3 is a local structure schematic view of the utility model;

[0025] Figure 4 is a heat transfer distribution schematic view of the utility model when working.

[0026] Label explanation

[0027] Concave shell 1 inner wall 11 sealing element 2 core material 3

[0028] Frame 4 extension 41 high barrier film 5

[0029] Exhaustion flow guide workpiece 6 open hole vacuum extraction patch 7 protective film 8

[0030] Box 91 door seal 92 door body 93 PU material 931 VIP board 932 Specific implementation

[0031] The utility model will be further described in combination with the drawings and specific embodiments. It needs to be explained here that the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] The utility model discloses a vacuum heat insulation integrated door, and is a preferred embodiment of the utility model, as shown in Figure 2 Sealing element 2, core material 3, frame 4 and high barrier film 5. Frame 4 is located in concave shell 1, and high barrier film 5 covers frame 4.

[0033] Frame 4 is a hard material, has certain strength, is used to compress core material, and high barrier film 5 is used to barrier gas at the upper end, generally selects aluminum foil, polyethylene (PE), nylon and other materials, and there are open holes (that is, exhaust ports) on the surface of high barrier film 5, which are used to exhaust vacuum gas outflow, and high barrier film 5 and frame 4 can be combined into a high barrier frame.

[0034] Core material 3 is a heat insulation material, guarantees the heat preservation performance of the vacuum heat insulation integrated door. Core material 3 can select one or more of fumed silica, glass fiber, open-cell polyurethane foam and microporous polymers, and in the embodiment, glass fiber is used to prepare core material 3.

[0035] Core material 3 is placed in the vacuum cavity formed by high barrier film 5, frame 4 and concave shell 1.

[0036] The sealing member 2 is located between the frame 4 and the concave shell 1, and is used to fill the gap and increase the structural strength of the integrated door. In addition, the sealing member 2 can also be used to repair the air leakage hole that may exist in the gap, thereby further increasing the service life of the product.

[0037] Further, the sealing member 2 is a low-temperature metal solder or a high-molecular sealing material. Such solder has a low melting point and good welding performance, and is commonly used in applications that require rapid welding and low heat impact. For example, Sn-Zn solder, Sn-Ag-Cu solder, and Sn-Bi solder, etc. Among them, the Sn-Bi solder is a low-temperature solder commonly used in the market, and its melting point is about 138-141℃.

[0038] The high-molecular sealing material is usually made of polymers or their compounds, and is favored for its excellent elasticity, chemical resistance, and ability to adapt to various working conditions. For example, rubber-based sealing materials and plastic-based sealing materials. Specifically, PE, PUR, EVA, EAA, POE, phenolic resin, butyl rubber, etc.

[0039] Further, the air extraction and flow guide workpiece 6 is built into the core material 3. Preferably, the air extraction and flow guide workpiece 6 is built into the middle of the core material 3, which is used to increase the flow guide and improve the efficiency of the hole extraction under the atmosphere.

[0040] Further, the concave shell 1 is made of a stamping sheet metal process. Stamping sheet metal is a common metal processing technology, which is mainly used to manufacture metal parts of various shapes and sizes. This process uses a mold and a press to plastically deform the metal sheet to produce the required geometric shape. In the present application, the concave shell 1 is made of a stamping sheet metal process, which has a certain strength and is used for normal temperature side, and high thermal conductivity can reduce the condensation phenomenon.

[0041] Further, a polyethylene (PE) coating layer (PE frame) is compounded on the surface of the frame 4, and the polyethylene coating layer is heat-sealed and bonded with the concave shell 1. The polyethylene coating layer and the high-barrier film 5 are heat-sealed and bonded. The PE coating layer is an adhesive material that can bond the frame with the concave shell 1 and the frame 4 with the high-barrier film 5, and the PE coating layer has barrier properties.

[0042] In the present embodiment, the PE frame is selected to facilitate heat sealing of the high-barrier film 5, and the high-barrier film 5 can also be sealed by using a gas plastic adhesive. Plastic is selected because plastic has a low thermal conductivity and low transverse heat transfer. If transverse heat transfer is not considered, the frame 4 can also be made of a metal high-barrier material frame or a gas high-barrier material frame to meet the actual needs of different products.

[0043] Further, as shown in FIG. 1, the frame 4 is made of a high-barrier material, and the high-barrier film 5 is bonded to the frame 4 by heat sealing. Figure 3As shown, the bottom of the frame 4 has an extension 41 that covers the concave housing 1 and extends toward the inner wall 11 of the concave housing 1. The extension 41 increases the contact area between the frame 4 and the concave housing 1, thereby increasing the bonding strength.

[0044] Furthermore, viewed from above, frame 4 has a U-shaped appearance. The hollow design further reduces production costs.

[0045] Furthermore, it also includes a vacuum evacuation patch 7, which covers the evacuation hole of the vacuum chamber. This is used to seal the vacuum evacuation port of the vacuum-insulated integrated door, covering the opening and maintaining the vacuum level of the door.

[0046] Furthermore, it also includes a protective film 8, which covers the high-barrier film 5 and is connected to the concave outer shell 1. The protective film 8 mainly serves a decorative purpose and can also be used to cover up appearance imperfections, making the vacuum insulated integrated door look more seamless. In addition, it can also ensure flatness under atmospheric pressure.

[0047] The protective film 8 can also be made of the same material as the high-barrier film 5 and undergo a secondary vacuum. The secondary vacuum reduces the leakage rate at the opening, thereby reducing the leakage rate of the barrier film at the opening and further improving its performance.

[0048] In another embodiment, a vacuum-insulated integrated door includes a stamped sheet metal shell (concave shell 1), a low-temperature metal solder (sealant 2), a core material, a PE frame (frame 4), a high-barrier membrane 5, an air extraction and flow guiding component 6, an open-aperture vacuum patch 7, and another high-barrier membrane (protective film 8). The PE frame is located within the stamped sheet metal shell, the high-barrier membrane 5 covers the PE frame, and the low-temperature metal solder is located between the PE frame and the stamped sheet metal shell. The air extraction and flow guiding component 6 is embedded in the core material 3. The surface of the high-barrier membrane 5 has openings, which are covered by the open-aperture vacuum patch 7. The core material 3 and the air extraction and flow guiding component 6 are placed within a vacuum cavity formed by the other high-barrier membrane, the open-aperture vacuum patch 7, the high-barrier membrane 5, the PE frame, the low-temperature metal solder, and the stamped sheet metal shell.

[0049] During manufacturing, a stamped sheet metal shell serves as the base, with the vacuum guide component 6 embedded within the core material 3. First, the PE core material frame presses down on the core material 3, further compressing it until the lower surface of the PE core material contacts the stamped sheet metal shell. A ring heater is then used for heat sealing to maintain the core material 3 in a compressed state. Next, the high-barrier membrane 5 is pressed down a second time and heat-sealed to the upper surface of the PE frame. Then, the vacuum device uses the vacuum guide component 6 to create a vacuum. After vacuuming, the vacuum patch 7 is pressed down to block the air vent, maintaining the internal vacuum. After initially maintaining the vacuum, a low-temperature metal solder is heated and melted to further fill any potential leaks, maintaining the vacuum while increasing structural stability. Finally, another high-barrier membrane is covered and attached to the inner surface of the product, serving as decoration and providing a secondary vacuum environment, thus creating a vacuum-insulated integrated door.

[0050] When using this utility model, such as Figure 4 The image shown is of the bag-type VIP non-PU refrigerator integrated door disassembled this time. Figure 4 (For illustrative purposes only, only the main components are shown.) Compared to other existing door bodies, its main heat leakage point is only T5 at the door seal 92. Because the core material 3 in the integrated door of this utility model is thicker, the VIP board formed is thicker than the VIP board in the prior art, and the area is slightly larger than the door seal 92. Therefore, the heat transfer area of ​​the integrated door of this utility model is smaller than that of the bag-type VIP-PU foam refrigerator door in the prior art, and the heat insulation performance is better.

[0051] This invention uses VIP (Vacuum Insulation) for thermal insulation, eliminating the need for PU foam. The structure is simpler, requiring only a thinner door to achieve the same insulation effect as a refrigerator. It avoids the condensation caused by significant heat leakage at multiple points in existing technologies, such as the joints between PU and VIP, the PU material itself, and the combination of PU and the door seal, due to the insufficient thermal insulation performance of PU material.

[0052] When applied to refrigerator doors, this invention helps to make refrigerators thinner and lighter, allowing for greater storage space while maintaining a consistent external size. Furthermore, this invention can also be used in freezers or insulated boxes to meet diverse customer needs.

[0053] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any changes or modifications made in accordance with the claims and description of the present utility model should fall within the scope of the patent of the present utility model.

Claims

1. A vacuum insulated integrated door, characterized by: It includes a concave outer shell, a seal, a core material, a frame and a high-barrier film. The frame is located in the concave outer shell, the high-barrier film covers the frame, the core material is placed in the vacuum cavity formed by the high-barrier film, the frame and the concave outer shell, and the seal is located between the frame and the concave outer shell.

2. The integrated door with vacuum insulation according to claim 1, characterized in that: The seal is a low-temperature metal solder or a polymer sealing material.

3. The integrated vacuum insulated door of claim 1, wherein: It also includes an air extraction and diversion workpiece, which is built into the core material.

4. The integrated vacuum insulated door of claim 1, wherein: The concave outer shell is made by stamping sheet metal process.

5. The integrated vacuum insulated door of claim 1, wherein: A polyethylene coating is laminated on the surface of the frame, and the polyethylene coating is heat-sealed and bonded to the concave outer shell and the high-barrier film respectively.

6. The integrated door with vacuum insulation according to claim 5, characterized in that: The bottom of the frame has an extension part, which covers the concave outer shell and extends towards the inner wall direction of the concave outer shell.

7. The integrated vacuum insulated door of claim 1, wherein: Viewed from the top-down direction, the frame is in a square shape with a hole in the middle.

8. The integrated vacuum insulated door of claim 1, wherein: The frame is a plastic frame, a metal frame or a gas high-barrier material frame.

9. The integrated vacuum insulated door of claim 1, wherein: It also includes an open-hole vacuum extraction patch, which covers the air extraction hole of the vacuum cavity.

10. The integrated vacuum insulated door of claim 1, wherein: It also includes a protective film, which covers the high-barrier film and is connected to the concave outer shell.

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