CN201944493U - Valence-reducible anti-gas-permeation vacuum heat insulation plate - Google Patents

Abstract

The utility model discloses a vacuum insulation panel capable of reducing price and anti-gas infiltration, which comprises a surface air barrier layer, a glass fiber core material and a seal; The surface air barrier layer from inside to outside is in order: surface heat seal layer, surface heat resistance layer, surface gas barrier layer, and surface radiation protection layer. The vacuum insulation panel described in this utility model effectively reduces the problem of gas penetration affecting the degree of vacuum, and effectively maintains the overall service life of the entire vacuum insulation panel. More, can save the gas adsorbent, reduce the production cost, and at the same time have good safety and high stability when used.

Description

A kind of vacuum insulation panel that can reduce the price of anti-gas permeation

technical field

The utility model belongs to the technical field of thermal insulation material engineering, and in particular relates to an anti-gas permeation vacuum thermal insulation panel with glass fiber as the core material.

Background technique

Low-carbon and energy-saving emission reduction have become the basic strategies of national energy strategy and economic life. While actively researching and developing low-energy consumption products or improving existing equipment to reduce energy consumption, national research institutions are also paying more and more attention to improving the heat insulation capacity of maintenance structures To prevent excessive loss of energy. It is against this background that vacuum insulation technology emerges as the times require. The thermal conductivity of the glass fiber core vacuum insulation panel is as low as 5mW/(m·k), which is the best thermal insulation material at present. The research and development of vacuum insulation panels in our country started relatively late, but its technology is becoming more and more perfect in our country, and many enterprises in the country are actively researching and developing vacuum insulation panels.

Vacuum insulation panels achieve heat insulation by greatly increasing the internal vacuum degree. The key to its production is to pump the inside of the vacuum insulation panel to an extremely low atmospheric pressure, and to maintain the vacuum inside the panel during the entire service life of the vacuum insulation panel. an important technology. And this task mainly relies on the air barrier structure to complete.

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 base. The conventional vacuum insulation panel air insulation structure packaging bag shown in Figure 1 is composed of two pieces of air insulation structure It is heat-sealed. Generally, the three sides are heat-sealed first, and then the pre-treated glass fiber core material is filled in a bag-shaped air-insulating structure. The strip edge is sufficient; the profile of the formed product is shown in Figure 2. Due to the large differential pressure inside and outside of the conventional vacuum insulation panel, it is inevitable that a small amount of gas will penetrate into the panel through the gas barrier structure and the seal, and the pressure inside the panel will be increased, resulting in an increase in the thermal conductivity of the vacuum insulation panel, affecting its thermal performance. Thereby reducing its service life, even if there is the existence of the gas adsorption material, it cannot absorb the gas penetrating into the plate for a long time and effectively so as to ensure that the pressure does not rise during the entire service period.

Utility model content

Practical purpose: the practical purpose is to overcome the deficiencies of the prior art and provide a vacuum insulation panel that can reduce the price and reverse gas penetration.

Technical solution: In order to solve the above technical problems, the utility model provides a vacuum insulation panel that can reduce the price and reverse gas permeation, which includes a surface gas barrier layer, a glass fiber core material and a seal; the outer surface of the glass fiber core material wraps the surface gas barrier layer , with seals at both ends; the surface air barrier layer includes: surface heat seal layer, surface gas barrier layer, surface heat barrier layer, and surface radiation protection layer; the order of the surface layer air barrier layer from inside to outside is: surface heat seal Layer, surface heat barrier layer, surface gas barrier layer, surface radiation protection layer. The surface heat-sealing layer is made of high-density polyethylene or vinyl acetate; the surface gas-blocking layer is made of polyvinyl alcohol or/and gas-blocking paint, and the gas-blocking paint is generally acrylic varnish; the surface heat-blocking layer is made of polyolefin, such as polyethylene Ethylene, or polypropylene, or polyethylene copolymer; the surface radiation protection layer is made of metal film, and the metal film is generally made of aluminum foil or stainless steel film. The thickness of the surface air barrier layer is 200-500 microns, preferably 500 microns, and the surface air barrier layer has relatively low air permeability.

The inside of the glass fiber core material described in the utility model is provided with an internal price reduction gas-barrier and gas-barrier layer. The internal price reduction gas-barrier layer is a sandwich structure, the upper and lower layers are internal heat-seal layers, and the middle layer is an internal gas-barrier layer. The inner heat-sealing layer is made of high-density polyethylene or vinyl acetate; the inner air-barrier layer is made of polyvinyl alcohol or/and air-barrier paint.

The surface air barrier layer uses an adhesive to bond and press the surface heat sealing layer, the surface heat resistance layer, the surface gas barrier layer and the surface radiation protection layer together.

The inner price-reducing gas-barrier layer adopts an adhesive to bond and press the inner heat-sealing layer and the inner gas-barrier layer together.

A getter is arranged inside the glass fiber core material. The adhesive is: polyurethane adhesive.

A method for encapsulating a vacuum insulation panel capable of reducing price and anti-gas infiltration, the steps of which are as follows:

(1) The surface air barrier layer and the internal price-reduced gas barrier layer, or the surface air barrier layer are heat-sealed on three sides to make a bag, and one end is reserved for vacuuming;

(2) Put the glass fiber core material in the cavity of the bag and then vacuumize the inner glass fiber core material;

(3) Vacuum and keep for 1-3 minutes before heat sealing.

In this utility model, the glass fiber core material is separated by an independent bag-shaped chamber, and the getter can be prevented inside the glass fiber core material, and the gas will penetrate into the outermost layer of vacuum insulation board in a small amount due to the large pressure difference between the inside and outside. , Due to the small pressure difference between the outermost layer and the inner layer, the amount of gas permeation is very small, so that the overall glass fiber core maintains good thermal insulation performance in a relatively low vacuum state.

Beneficial effect: compared with the prior art, the utility model has the following advantages:

1. The vacuum insulation panel described in this application adopts step-by-step pressure reduction, and the gas penetrates step by step, which can effectively maintain the thermal insulation performance of the vacuum insulation panel and prolong the service life.

2. Step-by-step depressurization can effectively reduce the penetration of gas into the glass fiber core material. In the case of unsuitable getters, it can also maintain the vacuum degree of the inner layer for a long time, maintaining high thermal resistance and good performance. insulation properties.

3. The surface air barrier layer of the outer layer also protects the inner layer. Even if the surface air barrier layer is punctured, the overall thermal insulation performance of the vacuum insulation panel can still be maintained.

4. The vacuum insulation panel described in this application can effectively reduce the gas infiltration and prolong the overall service life of the entire vacuum insulation panel. The gas adsorbent reduces the production cost, and at the same time has good safety and high stability during use.

Description of drawings

Fig. 1 is a schematic structural diagram of a vacuum insulation panel in the prior art.

Fig. 2 is a sectional view of a vacuum insulation panel in the prior art.

Fig. 3 is a structural schematic diagram of the utility model.

Fig. 4 is a cross-sectional view of the utility model.

Fig. 5 is a schematic diagram of the structure of the surface air barrier layer in the present invention.

Fig. 6 is a schematic structural diagram of the internal price reduction gas-barrier layer in the present invention.

Detailed ways

Below in conjunction with specific embodiment, further clarifies this utility, should be understood that these examples are only used for illustrating this utility and is not intended to limit the scope of this utility, after having read this utility, those skilled in the art will understand various equivalent forms of this utility All modifications are within the limits of the appended claims of this application.

Example 1

A vacuum insulation panel capable of reducing price and anti-gas infiltration, which includes a surface gas barrier layer 12, a glass fiber core material 13 and a seal 11; the outer surface of the glass fiber core material 13 wraps the surface layer gas barrier layer 12, and seals 11 are provided at both ends; The surface air barrier layer 12 includes: a surface heat seal layer 121, a surface gas barrier layer 122, a surface heat barrier layer 123, and a surface radiation protection layer 124; the order of the surface air barrier layer 12 from the inside to the outside is: the surface heat seal layer 121 , a surface heat-resistant layer 123 , a surface gas-barrier layer 122 , and a surface radiation-proof layer 124 .

Example 2

A vacuum insulation panel capable of reducing price and anti-gas infiltration, which includes a surface gas barrier layer 12, a glass fiber core material 13 and a seal 11; the outer surface of the glass fiber core material 13 is wrapped with the gas barrier layer 12, and the two ends are provided with seals 11; The surface air barrier layer 12 includes: a surface heat seal layer 121, a surface gas barrier layer 122, a surface heat barrier layer 123, and a surface radiation protection layer 124; the order of the surface air barrier layer 12 from the inside to the outside is: the surface heat seal layer 121 , a surface heat-resistant layer 123 , a surface gas-barrier layer 122 , and a surface radiation-proof layer 124 . The glass fiber core material 13 is provided with an internal price reduction gas barrier layer 25 . The glass fiber core material 13 is provided with an internal price reduction gas barrier layer 25 . The internal price reduction gas barrier layer 25 is a sandwich structure, the upper and lower layers are internal heat seal layers 251 , and the middle layer is an internal gas barrier layer 252 . The glass fiber core material 13 is provided with a getter 14 inside.

The surface heat-sealing layer 121 is made of high-density polyethylene or vinyl acetate; the surface gas-barrier layer 122 is made of polyvinyl alcohol and gas-barrier paint; the surface heat-blocking layer 123 is made of polyethylene; the surface radiation-proof layer 124 is made of metal film. The inner heat-sealing layer 251 is made of high-density polyethylene; the inner air-barrier layer 252 is made of polyvinyl alcohol and air-barrier paint.

The surface air barrier layer 12 uses an adhesive to bond and press the surface heat seal layer 121, the surface heat resistance layer 123, the surface gas barrier layer 122, and the surface radiation protection layer 124 together with a polyurethane adhesive. The inner heat-seal layer 251 and the inner air-barrier layer 252 are bonded and pressed together by a polyurethane adhesive for the inner price-reducing gas-barrier layer 25 .

A method for encapsulating a vacuum insulation panel capable of reducing price and anti-gas infiltration, the steps of which are as follows:

(1) The surface air barrier layer and the internal price-reduced gas barrier layer, or the surface air barrier layer are heat-sealed on three sides to make a bag, and one end is reserved for vacuuming;

(2) Put the glass fiber core material in the cavity of the bag and then vacuumize the inner glass fiber core material;

(3) After evacuating and maintaining for 1-3 minutes, heat sealing is obtained to obtain the vacuum insulation panel described in this embodiment that can reduce the price and prevent gas permeation.

Claims (5)

1. A vacuum insulation panel capable of reducing price and anti-gas permeation, which includes a surface gas barrier layer (12), a glass fiber core material (13) and a seal (11); the outer surface of the glass fiber core material (13) wraps the surface gas barrier layer Layer (12), with seals (11) at both ends; it is characterized in that: the surface air barrier layer (12) includes: surface heat seal layer (121), surface gas barrier layer (122), surface heat barrier layer ( 123), the surface radiation protection layer (124); the surface gas barrier layer (12) is in order from the inside to the outside: the surface heat seal layer (121), the surface heat resistance layer (123), the surface gas barrier layer (122), Surface radiation protection layer (124). 2 . The vacuum insulation panel capable of reducing price and anti-gas permeation according to claim 1 , characterized in that: the glass fiber core material ( 13 ) is provided with an internal price reducing gas barrier layer ( 25 ). 3. The vacuum insulation panel capable of reducing price and anti-gas permeation according to claim 2, characterized in that: the internal price reducing gas barrier layer (25) is a sandwich structure, and the upper and lower layers are internal heat seal layers, The middle layer is the inner gas barrier layer. 4. The vacuum insulation panel capable of reducing price and anti-gas permeation according to claim 3, characterized in that: the glass fiber core material (13) is provided with a getter (14) inside. 5. The vacuum insulation panel capable of reducing price and anti-gas permeation according to claim 1, characterized in that: the surface gas barrier layer (12) uses an adhesive to seal the surface layer (121), the surface heat resistance layer ( 123), the surface gas barrier layer (122), and the surface radiation protection layer (124) are bonded and pressed together.

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