CN201982884U - Degraded gas-permeation-prevention vacuum insulation panel - Google Patents

Abstract

The utility model discloses a reduced-order anti-gas permeation vacuum heat insulation panel. The vacuum heat insulation panel has two layers of outer layer gas barrier structures and at least two layers of inner layer gas barrier structures; the outer layer gas barrier structure and the inner layer gas barrier structure The outer edges of the structure are heat sealed. Inside, a space is enclosed between every two layers of air-insulating structures, and the pre-treated core material with good thermal insulation performance is put into it and evacuated. During the use of the vacuum insulation panel of the utility model, the external gas needs to infiltrate into the vacuum insulation panel in stages, prolonging the gas permeation path, hindering the rise of internal pressure, effectively maintaining the insulation performance of the vacuum insulation panel, and prolonging the life of the vacuum insulation panel. service life. Moreover, the vacuum insulation panel of the present utility model can also use less or no gas adsorption material, which saves the production cost. The utility model has good economy, stability, safety and reliability.

Description

A reduced-order anti-gas permeation vacuum insulation panel

technical field

The utility model relates to the technical field of thermal insulation material engineering, in particular to a reduced-order anti-gas permeation vacuum heat insulation panel which prevents gas permeation by reducing the order.

Background technique

Low-carbon, energy-saving and emission-reduction have become the basic strategies of national energy strategy development and economic life. National research institutes are actively developing low-energy products or improving existing equipment to reduce energy consumption, and they are also paying more and more attention to improving the insulation of enclosure structures. Thermal capacity to prevent transitional loss of energy. It is against this background that vacuum insulation technology emerges as the times require. The research and development of vacuum insulation panels in my country started relatively late, but its technology is becoming more and more perfect in my country, and many enterprises in the country are actively researching and developing vacuum insulation panels.

The interior of the vacuum insulation panel is vacuum and filled with a core material with good thermal insulation performance. The higher the vacuum degree, the better the thermal insulation performance of the core material. Therefore, the most important function of the vacuum insulation panel is to be able to prevent gas from entering its interior, and this function is mainly accomplished by the gas barrier structure. At present, the air-insulation structure of vacuum insulation panels at home and abroad is made of composite materials, generally made of aluminum foil and polyester-based composite materials, designed into a film shape, and two air-insulation structures of the same size are stacked together during production. , first seal the three sides, make it into a bag, then add the core material and accessories into it, then place it in a vacuum chamber to heat seal the fourth side, turn over and fold the remaining lip and fix it with tape or adhesive to form a bag. The structure shown in Figure 1. The internal vacuum of the vacuum insulation panel is extremely high, generally around 0.01Pa, or even lower, almost close to vacuum. During the entire use of the vacuum insulation panel, under the condition of great disparity in the pressure inside and outside the panel, it is inevitable that gas will permeate through the surface of the air barrier structure and penetrate into the panel, and the pressure inside the panel will increase, which will affect the overall heat insulation effect of the vacuum insulation panel. The service life of the vacuum insulation panels is relatively low.

During the entire use of the vacuum insulation panel, how to more effectively maintain the vacuum inside the panel and prolong the life of the vacuum insulation panel is one of the technical problems to be solved in the production of the vacuum insulation panel.

Utility model content

The technical problem to be solved by the utility model is to propose a reduced-order anti-gas permeation vacuum insulation panel for the above-mentioned technical problems in the prior art. The air-insulating structure is added in the bag-like structure, and the core material is encapsulated to extend the gas permeation path to resist gas permeation, to ensure that the overall thermal insulation performance of the insulation panel will not be weakened for a long time, and to prolong the service life of the vacuum insulation panel.

The technical problem required to be solved by the utility model can be realized through the following technical solutions:

A reduced-order anti-gas permeation vacuum insulation panel, comprising a surface gas barrier structure and a core material, the outer edge of the surface gas barrier structure is heat-sealed, and the core material is filled in a bag-like chamber surrounded by the surface gas barrier structure, The internal pressure of the vacuum insulation panel is equal to or less than 0.01MPa; there are at least two inner gas-insulating structures in the chamber surrounded by the surface-layer air-insulating structure, and the outer edge of the inner-layer air-insulating structure and the outer edge of the surface-layer air-insulating structure The edges are heat-sealed together, and the core material is filled in the bag-shaped cavity surrounded by the air-insulating structure.

The inner gas-barrier structure is a sandwich structure, the upper and lower layers are heat-sealed layers, the middle layer is a gas-barrier layer, and the layers are glued and pressed together.

The air barrier structure of the surface layer at least includes from the inside to the outside: a heat-sealing layer, a heat-blocking layer, a gas-blocking layer, and a radiation-proof layer, and the layers are bonded with glue and pressed together, with a thickness of 200-500 microns.

A getter is placed inside the outermost core material of the vacuum insulation panel.

The air-barrier paint is coated on the outside of the air-barrier layer.

Due to the adoption of the above technical solution, compared with the prior art, the utility model has the following characteristics: it can effectively maintain the thermal insulation performance of the vacuum insulation panel for a long time and prolong the service life. If there are more grades, less or even no gas adsorption material can be used to reduce the production cost and improve its economy. Furthermore, the outer heat insulation structure also protects the inner heat insulation structure, improving the safety and stability of the vacuum insulation panel during use.

Description of drawings

Fig. 1 is a schematic diagram of a conventional vacuum insulation panel.

Fig. 2 is a sectional view of a conventional vacuum insulation panel.

Figure 3 is a schematic diagram of the vacuum insulation panel of the utility model.

Figure 4 is a sectional view of the vacuum insulation panel of the utility model;

Figure 5 Sectional view of the surface air barrier structure;

Figure 6 Sectional view of the inner layer air barrier structure.

In the figure, 11-sealing, 12-surface gas barrier structure, 121-heat seal layer in the surface layer gas barrier structure, 122-gas barrier layer in the surface layer gas barrier structure, 123-heat barrier layer in the surface layer gas barrier structure, 124-Radiation protection layer in surface air barrier structure, 13-Glass fiber core material, 14-Getting agent (gas adsorption material and desiccant), 25-Inner layer air barrier structure, 251-The heat of inner layer air barrier structure Sealing layer, 252—the gas barrier layer of the inner layer gas barrier structure.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

The structure of the existing vacuum insulation panel is shown in Figure 1 and Figure 2. Generally, the three sides of the surface air barrier structure 12 are heat-sealed to form a seal 11, and then the pretreated glass fiber core material 13 is filled in the bag-shaped surface layer. In the gas barrier structure 12, the gas in the core material 13 is extracted in the vacuum chamber, the getter 14 is placed in the outermost core material 13, and finally the fourth side is heat-sealed in the vacuum chamber. Due to the large pressure difference between the inside and outside of the existing vacuum insulation panels, a small amount of gas will inevitably penetrate into the panel through the surface gas barrier structure 12 and the seal 11, which will increase the pressure inside the panel, resulting in an increase in the thermal conductivity of the vacuum insulation panel, affecting its performance. Insulation performance reduces its service life. Even with the presence of the gas adsorption material 14, it cannot absorb the gas penetrating into the panel effectively for a long time, so as to ensure that the internal pressure of the vacuum insulation panel does not rise for a long time.

The structure of the vacuum insulation panel of the present invention is shown in Fig. 3 and Fig. 4. First, the three sides of the two-layer surface gas-insulating structure 12 and the two or more layers of inner-layer gas-insulating structure 25 of the same size are heat-sealed with a sealing machine. , to form the seal 11, when heat sealing, pay attention to the relative heat seal layer, the seal 11 is melted first and then bonded in the packaging machine, so it has good heat sealing and gas barrier properties. Then the pretreated glass fiber core material 13 is respectively placed in the bagged chamber formed by the air-insulated structure, and the whole is placed in a vacuum packaging machine for vacuuming. When the vacuum pressure reaches the set value, heat seal the fourth side after holding the pressure for a period of time. The core material 13 is separated by an independent bag-shaped chamber, and a small amount of getter 14 is placed in the outermost core material 13 or may not be placed.

The surface gas barrier structure 12 is the first structure to prevent gas from penetrating into the vacuum insulation panel. Its specific structure is shown in FIG. layer 122 and a radiation protection layer 124. The heat-sealing layer 121 is made of high-density polyethylene or polybutylene or vinyl ethyl acetate, and the gas-barrier layer 122 is made of polyvinyl alcohol. If necessary, it can be coated with a gas-barrier paint, usually acrylic varnish. The thermal barrier layer 123 is made of polyolefin, such as polyethylene, polypropylene or polyethylene copolymer. The radiation protection layer 124 is generally made of a metal film, and the commonly used metal film is aluminum foil or stainless steel film. The layers are bonded with a polyurethane adhesive. Generally, the thickness of the outer gas barrier structure is 200-500 microns, preferably 500 microns. The inner layer gas barrier structure 25 involved in the utility model mainly has a gas barrier effect, and its composition is shown in FIG. 6 . Its structure should be a sandwich structure, the upper and lower layers are heat-sealing layers 251, the middle layer is a gas barrier layer 252, and the layers are bonded and pressed together with an adhesive. The gas-insulating structure composite material selected by the utility model is formed by lamination, and has high peeling strength and low gas permeability.

Due to the large pressure difference between the inside and outside of the vacuum insulation panel, a small amount of gas will penetrate into the surface gas insulation structure 12, while the pressure difference inside the vacuum insulation panel is very small, and the gas that gradually penetrates inward from the outermost stage will be very little, and the inner layer The core material 13 can still be in a relatively low vacuum state, so it can still maintain good thermal insulation performance.

The vacuum heat insulation panel of the utility model adopts step-by-step pressure reduction, and the gas permeates step by step, which can effectively maintain the heat insulation performance of the vacuum heat insulation panel for a long time and prolong the service life. On the other hand, step-by-step decompression can effectively reduce the penetration of gas into the core layer. Even without the use of getters, it can maintain the vacuum degree in the inner-level gas-insulation structure for a long time and maintain the entire vacuum insulation panel. Better thermal insulation performance, reduce production cost. Furthermore, the first-order air barrier structure of the outer layer also protects the inner layer air barrier structure. Even if the outer layer gas barrier structure is punctured, there is still a good inner layer gas barrier structure with a certain degree of vacuum, ensuring The overall vacuum insulation panel still has good thermal insulation performance, which prolongs the service life of the vacuum insulation panel.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (5)

1. A reduced-order anti-gas permeation vacuum insulation panel, comprising a surface gas barrier structure and a core material, the outer edge of the surface gas barrier structure is heat-sealed, and the core material is filled in a bag-shaped cavity surrounded by the surface gas barrier structure In the room, the internal pressure of the vacuum insulation panel is equal to or less than 0.01MPa; it is characterized in that there are at least two inner layer air isolation structures in the chamber surrounded by the surface layer air isolation structures, the outer edge of the inner layer air isolation structures and The outer edges of the surface air-insulation structure are heat-sealed together, and the bag-shaped cavity surrounded by the air-insulation structure is filled with core materials. 2. A reduced-order anti-gas permeation vacuum insulation panel according to claim 1, characterized in that the inner gas barrier structure is a sandwich structure, the upper and lower layers are heat-sealed layers, and the middle layer is a gas barrier Layers are glued together and pressed together. 3. A reduced-order anti-gas permeation vacuum insulation panel according to claim 1 or 2, characterized in that the surface gas barrier structure includes at least a heat seal layer, a heat barrier layer, and a gas barrier layer from the inside to the outside. Layer, anti-radiation layer, each layer is bonded with glue, and pressed together, the thickness is 200-500 microns. 4 . The reduced-order anti-gas permeation vacuum insulation panel according to claim 1 , wherein a getter is placed in the outermost core material of the vacuum insulation panel. 5 . The reduced-order anti-gas permeation vacuum insulation panel according to claim 1 , wherein a gas-barrier paint is coated on the outside of the gas-barrier layer. 6 .

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