CN101793341A

CN101793341A - Vacuum insulating board with built-in absorber

Info

Publication number: CN101793341A
Application number: CN 201010139702
Authority: CN
Inventors: 刘军; 任国琼
Original assignee: Chongqing Zaisheng Technology Development Co Ltd
Current assignee: Chongqing Zaisheng Technology Development Co Ltd; CHONGQING ZAISHENG Tech DEV CO Ltd
Priority date: 2010-04-06
Filing date: 2010-04-06
Publication date: 2010-08-04

Abstract

The invention discloses a vacuum insulating board with a built-in absorber, which comprises glass fiber core materials, an aluminum foil and the absorber. The aluminum foil is hermetically coated outside the glass fiber core materials; the inside of the aluminum foil is vacuumized; the absorber is arranged in the aluminum foil and used for water absorption; and the absorber comprises an absorbent container and an absorbent arranged in the absorbent container. Because the absorbent can effectively absorb the residual water of the glass fiber core materials and the penetrated water in the aluminum foil, the invention can effectively improve the vacuum degree in the aluminum foil, thereby reducing the heat conductivity factor of the insulating board and improving the heat insulation effect of the insulating board.

Description

The vacuum heat-insulating plate of built-in adsorber

Technical field

The present invention relates to thermoinsulation material, particularly a kind of vacuum heat-insulating plate of built-in adsorber.

Background technique

In refrigerating equipments such as refrigerator, refrigerator-freezer, need the outer wall of equipment is made interlayer, and the little packing material of thermal conductivity is set in interlayer, to reduce thermal loss, cut down the consumption of energy.

At present, generally the packing material of Cai Yonging is a polyurethane foam, but, because the cause that air conducts heat, polyurethane foam is very limited improving adiabatic work efficacious prescriptions face, for improving refrigeration and energy saving, a kind of improved heat insulating construction comes into operation, be about to that vacuum heat-insulating plate is inserted in the interlayer and with the stacked formation thermal-protective coating that is provided with of polyurethane foam, the employed vacuum heat-insulating plate of this structure can reach insulation effect preferably, but, cause its thermal conductivity can not reach optimal value, simultaneously owing to still have a spot of moisture content in the thermal shield, its glass fibre core adopts dry forming technology to make usually, thickness is bigger, causes remaining more moisture content and other gases, and the thermal conductivity of thermal shield is also had adverse influence.Disclose the glass fibre core as patent CN201326872 and vacuumized the preparation process that produces vacuum heat-insulating plate through aluminium foil, but handle with regard to how handling water and other gases inner residual and that penetrate into, simultaneously, the also not mentioned glass fibre core of this patent is dry forming or wet moulding, and its heat insulation capacity also has the space that promotes.Patent CN2828520 discloses a kind of vacuum heat-insulating plate, and its core is mixed by aerosil and glass fibre, the also content of not mentioned drying, and there is the space of lifting equally in its heat insulation capacity.

At above-mentioned deficiency, need to explore a kind of novel evacuated thermal shield, the water that makes its inner institute produce or penetrate into can effectively be absorbed, to improve its insulation effect and to make it have the advantage that keeps the well insulated effect for a long time.

Summary of the invention

In view of this, the invention provides a kind of vacuum heat-insulating plate of built-in adsorber, this vacuum heat-insulating plate can be realized the absorption of water that its inside is produced or penetrates into, effectively improves its insulation effect.

The vacuum heat-insulating plate of built-in adsorber of the present invention, comprise that glass fibre core and sealed packet are overlying on the outer aluminium foil of glass fibre core, aluminium foil inside vacuumizes, comprise also being arranged at the adsorber that aluminium foil inside is used to absorb water that described adsorber comprises the absorbing agent container and is arranged at the interior absorbing agent of absorbing agent container.

Further, described absorbing agent comprises unslaked lime and zeolite;

Further, described unslaked lime and zeolite are granular, and its particle diameter is 1～5mm;

Further, described glass fibre core is made by wet therapy forming process;

Further, described absorbing agent container bottom is provided with the air permeable plate of the ventilative micropore of band, and seals by ventilated membrane;

Further, described aluminium foil is a tubular structure, and its two ends are extended the glass fibre core and are one by heat welded.

The beneficial effect of the invention: the vacuum heat-insulating plate of built-in adsorber of the present invention, comprise that glass fibre core and sealed packet are overlying on the outer aluminium foil of glass fibre core, aluminium foil inside vacuumizes, also comprise and be arranged at the adsorber that aluminium foil inside is used to absorb water, described adsorber comprises the absorbing agent container and is arranged at the interior absorbing agent of absorbing agent container, since absorbing agent can effectively absorb aluminium foil internal glass fibers core remaining water and water through penetrating into, improved the degree of vacuum of aluminium foil inside, thereby reduced the thermal conductivity of thermal shield, improved its insulation effect.

Description of drawings

Below in conjunction with drawings and Examples the present invention is further described.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of adsorber.

Embodiment

Fig. 1 is a structural representation of the present invention; Fig. 2 is the structural representation of adsorber, as shown in the figure: the vacuum heat-insulating plate of the built-in adsorber of present embodiment, comprise that glass fibre core 1, sealed packet are overlying on the aluminium foil 2 outside the glass fibre core 1 and are arranged at the adsorber 3 that aluminium foil 2 inside are used to absorb water, aluminium foil 2 inside vacuumize, described adsorber 3 comprises absorbing agent container 4 and the absorbing agent 5 that is arranged in the absorbing agent container 4, described absorbing agent 5 comprises unslaked lime and zeolite, by the chemical property of unslaked lime and zeolite as can be known, CaO+H can take place in unslaked lime and water ₂O → Ca (OH) ₂Chemical reaction, have very strong moisture absorption, simultaneously, zeolite also has very strong moisture absorption, can be used as siccative, and described unslaked lime and zeolite are granular, its particle diameter is 1～5mm, if particle diameter is too little, the gentle area of contact with unslaked lime and zeolite of water that then infiltrates through in the thermal shield is also more little, influence its degassing effect that dewaters, if particle diameter is too big, then can't store up the unslaked lime and the zeolite of capacity in container, influence its degassing effect that dewaters equally, in the present embodiment, particle diameter is selected 3mm.

Following table is for adding adsorber and the wet method vacuum heat-insulating plate thermal conductivity contrast that does not add adsorber:

Title	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7
Title	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7	Do not add adsorber (thermal conductivity W/mK)	??0.0043	??0.0044	??0.0042	??0.0043	??0.0042	??0.0043	??0.0043
Add adsorber (thermal conductivity W/mK)	??0.0030	??0.0029	??0.0028	??0.0029	??0.0029	??0.0028	??0.0029	Do not add adsorber (thermal conductivity W/mK)	??0.0043	??0.0044	??0.0042	??0.0043	??0.0042	??0.0043	??0.0043

As seen from the above table, the wet method vacuum heat-insulating plate thermal conductivity of adding adsorber obviously reduces with respect to the wet method vacuum heat-insulating plate thermal conductivity that does not add adsorber.

In the present embodiment, described glass fibre core 1 is made by wet therapy forming process, because wet moulding is after glass fibre fully is dispersed to 0.1-0.2% concentration, through vacuum, technologies such as oven dry are manufactured paper with pulp and are formed, its density promotes greatly, thickness also descends thereupon, glass fibre core with respect to dry forming, its adiabatic effect can improve more than 2 times, therefore, not needing additionally to increase adsorber can make the production of gas in the vacuum heat-insulating plate minimize, and keep adiabatic effect for a long time, following table adopts the dry forming manufacturing for the glass fibre core and adopts the vacuum heat-insulating plate thermal conductivity that does not add adsorber of wet moulding manufacturing to compare:

Title	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7
Title	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7	Dry method is made core thermal shield thermal conductivity W/mK	??0.016	??0.018	??0.015	??0.025	??0.017	??0.016	??0.022
Wet method is made core thermal shield thermal conductivity W/mK	??0.0048	??0.0049	??0.0048	??0.0047	??0.0047	??0.0048	??0.0047		??0.016	??0.018	??0.015	??0.025	??0.017	??0.016	??0.022

As seen from the above table: the thermal conductivity that adopts the glass fibre core thermal shield of wet moulding is more than 2 times of thermal conductivity that adopt the glass fibre core thermal shield of dry forming.

In the present embodiment, described absorbing agent container 3 bottoms are provided with the air permeable plate 6 of the ventilative micropore of band, and seal by ventilated membrane 7, and simple in structure, fabricating cost is low.

In the present embodiment, described aluminium foil 2 is a tubular structure, and its two ends are extended glass fibre core 1 and are one by heat welded, reach better sealing effect.

Explanation is at last, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technological scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. the vacuum heat-insulating plate of a built-in adsorber, comprise that glass fibre core (1) and sealed packet are overlying on the outer aluminium foil (2) of glass fibre core (1), aluminium foil (2) inside vacuumizes, it is characterized in that: comprise also being arranged at the adsorber (3) that aluminium foil (2) inside is used to absorb water that described adsorber (3) comprises absorbing agent container (4) and is arranged at the interior absorbing agent (5) of absorbing agent container (4).

2. the vacuum heat-insulating plate of built-in adsorber according to claim 1, it is characterized in that: described absorbing agent (5) comprises unslaked lime and zeolite.

3. the vacuum heat-insulating plate of built-in adsorber according to claim 2, it is characterized in that: described unslaked lime and zeolite are granular, and its particle diameter is 1～5mm.

4. the vacuum heat-insulating plate of built-in adsorber according to claim 3, it is characterized in that: described glass fibre core (1) is made by wet therapy forming process.

5. the vacuum heat-insulating plate of built-in adsorber according to claim 4 is characterized in that: the air permeable plate (6) of the ventilative micropore of band is set bottom the described absorbing agent container (3), and seals by ventilated membrane (7).

6. the vacuum heat-insulating plate of built-in adsorber according to claim 5, it is characterized in that: described aluminium foil (2) is a tubular structure, its two ends are extended glass fibre core (1) and are one by heat welded.