Built-in integral special-shaped vacuum heat-insulating plate for icebox and processing method thereof
Technical field
The present invention relates to a kind of special-shaped vacuum heat-insulating plate, in particular for the special-shaped vacuum heat-insulating plate of obstruct refrigerator refrigeration compressor and refrigerator inside storage area, and the processing method of this special-shaped vacuum heat-insulating plate, belong to field of domestic appliances manufacture technology.
Background technology
For the heat preservation principle of thermos bottle, it is well known that more than 100 year: the air in the double-layer glass tube is taken away sealing form certain low-voltage space, just can significantly reduce heat exchange, reach adiabatic purpose.So both can allow boiling water warming, also can allow the cold drink cold insulation.Its principle is: the gas molecule in the heat insulation layer is few more, and heat convection is also just few more, sufficiently high words of vacuum even can stop the gaseous exchange heat exchange.According to this principle, people design vacuum heat-insulating plate, and are applied at aspects such as heat-preserving equipments such as military project, shipping incubator, refrigerator, refrigerator-freezer, refrigerator car, frozen products insulated container, freezer, water heater and construction wall heat-insulation and heat-preservations.
Traditional vacuum heat-insulating plate is a kind of slab construction, uses materials such as glass fibre, glass face, polyurathamc, foamed styrene usually, forms with barrier film vacuum seal warming plate (core).Because the restriction of technology and material, the internal vacuum of heat-insulating shield low (absolute pressure 〉=13.32Pa), the barrier film barrier property is low, the non-environmental protection of core, the thermal conductivity factor of the vacuum insulation panel of making does not meet the modern concepts of environmental protection and energy saving greater than 0.050w/mk.Specific to this class application scenario of refrigerator, under the situation of identical appearance,, just must reduce the general thickness of thermal insulation layer as far as possible for improving the useful space.Compare with being all expanded material, the application of vacuum heat-insulating plate can reduce the gross thickness of thermal insulation layers such as sidewall greatly, cuts down the consumption of energy; But existing vacuum heat-insulating plate can not satisfy the designing requirement of people to refrigerator structure, and the vacuum heat-insulating plate of slate structure also is not suitable for the refrigerator inside structure.Particularly in the isolated area of refrigeration compressor and refrigerator inside storage area, use the vacuum heat-insulating plate of polylith slab construction, must have piece, in these slits, play the expanded material that remains of heat-blocking action, this just makes that the usefulness of vacuum heat-insulating plate is not farthest brought into play.
Summary of the invention
Purpose of the present invention is exactly in order to solve the above-mentioned problems in the prior art, and a kind of built-in integral special-shaped vacuum heat-insulating plate for icebox and processing method thereof are provided.This special-shaped vacuum heat-insulating plate adopts monolithic construction, the structure of the isolated area at profile and refrigeration compressor position of living in is complementary, stopped the phenomenon of plate type evacuated heat-insulating shield " piece leaks heat ", energy consumption drops to minimum, internal vacuum improves, thermal conductivity factor significantly reduces, and keeping warmth space is big under same volume, power consumption is little to make refrigerator, meets the requirement of environmental protection and energy saving.
Purpose of the present invention is achieved by the following technical programs:
Built-in integral special-shaped vacuum heat-insulating plate for icebox, be installed on the isolated area of refrigerator refrigeration compressor and refrigerator inside storage area, comprise composite membrane and warming plate, composite membrane is two-layer up and down, enclosed shape pouch vacuum-sealed cavity all around, described warming plate places in this vacuum-sealed cavity, is characterized in: the profile of this special-shaped vacuum heat-insulating plate is dull and stereotyped three sections fold-type structures by secondary bending process formation two horizontal clip pricked, and three sections the size and the geometry of described isolated area are complementary; The described outer surface of two-layer composite membrane up and down is one or more layers nylon film protective layer, and inner surface is the layer of polyethylene hot sealing layer, is provided with 3-5 floor height barrier film layer between outer surface and the inner surface; Described warming plate surface scribbles the nano gas sorbing material layer.
The processing method of above-mentioned built-in integral special-shaped vacuum heat-insulating plate for icebox may further comprise the steps successively:
1. various barrier films are combined into the composite membrane with high obstructing performance, the skin of composite membrane is one or more layers nylon film protective layer, and internal layer is the layer of polyethylene hot sealing layer, and the intermediate layer is the 3-5 floor height barrier film layer that dry method is composited, compound tense, coating adhesive between layer and the layer;
2. warming plate is carried out the secondary bending process, form three sections fold-type structures of two horizontal clip pricked, the geometry of the isolated area of three sections size and refrigerator refrigeration compressor and refrigerator inside storage area is complementary;
3. in warming plate surface spraying nano gas absorption spraying, the surface at warming plate after both combinations forms the nano gas sorbing material layer, dries processing then, makes water content be lower than 8 ‰;
4. cover warming plate with the 1. described composite membrane of step like bag shape cover, the polyethylene heat-sealing layer of composite membrane contacted with the nano gas sorbing material layer of warming plate outer surface when cover covered;
5. get rid of the air of above-mentioned bag shape component internal with the ultrahigh vacuum packaging machine, form high vacuum state, and under high vacuum state encapsulated moulding.
In the technique scheme, described warming plate adopts superfine glass fibre or alumina silicate fibre to make, and the average diameter of fiber is 2~4um, and density is 200~280kg/m
3, thermal conductivity factor is less than 0.010w/mk; Described high-isolation film layer adopts OTR oxygen transmission rate and the extremely low composite of water vapour permeability to make, at least contain ethylene-vinyl alcohol copolymer in the composite, or contain multi-layer co-extruded polyester nanocomposites film at least, or contain noncrystalline polyamide resin membrane of lipoprotein at least.
In the processing method of refrigerator, can further carry out secondary after 5. in step and seal, and as required sealing part be carried out deburring, composite membrane that cutting is unnecessary and bound edge the vacuum heat-insulating plate after the moulding with the built-in integral vacuum heat-insulating plate.
Technique effect of the present invention mainly shows the following aspects:
(1) composite membrane of vacuum heat-insulating plate and warming plate are to adopt new material to make, produce and application process in ODS not, have environmental protection and energy-conservation two-fold advantage;
(2) vacuum heat-insulating plate internal vacuum height, thermal conductivity factor is lower than 0.0030w/mk.Adopt this vacuum heat-insulating plate, the remarkable attenuation of the heat-insulation layer of refrigerator, under the measure-alike situation of profile, the insulation of refrigerator, refrigeration and storage space increase, and power consumption significantly reduces;
(3) adopt after the built-in integral special-shaped design, the effect of heat insulation of refrigerator refrigeration compressor and interior storage space is better, has stopped the phenomenon of plate type evacuated heat-insulating shield " piece leaks heat ", and energy consumption drops to minimum.
Description of drawings
Fig. 1 is a built-in integral special-shaped vacuum heat-insulating plate for icebox scheme of installation of the present invention;
Fig. 2 is a built-in integral special-shaped vacuum heat-insulating plate for icebox principle schematic of the present invention;
Fig. 3 is a kind of layer structure schematic diagram of composite membrane;
Fig. 4 is another layer structure schematic diagram of composite membrane.
Wherein, 1 is refrigeration compressor, and 2 is built-in integral special-shaped vacuum heat-insulating plate, and 3 is composite membrane; 4 is warming plate, and 5 is the nylon film protective layer, and 6 is the high-isolation film layer; 7 is the polyethylene heat-sealing layer, and 8 is the nano gas sorbing material layer, the 9,10,11, the 12nd, and the sealing of composite membrane.
The specific embodiment
Below in conjunction with Figure of description technical solution of the present invention is described in further detail.
As depicted in figs. 1 and 2, a kind of built-in integral special-shaped vacuum heat-insulating plate for icebox 2, be installed on the isolated area of refrigerator refrigeration compressor 1 and refrigerator inside storage area, comprise composite membrane 3 and warming plate 4, composite membrane 3 is two-layer up and down, enclosed shape pouch vacuum-sealed cavity all around, described warming plate 4 places in this vacuum-sealed cavity.Be characterized in that the profile of this vacuum heat-insulating plate 2 is dull and stereotyped three sections fold-type structures by secondary bending process formation two horizontal clip pricked, three sections the size and the geometry of described isolated area are complementary, as shown in Figure 1; The described outer surface of two-layer composite membrane 3 up and down is one or more layers nylon film protective layers 5, and inner surface is a layer of polyethylene hot sealing layer 7, is provided with 3-5 floor height barrier film layer 6 between outer surface and the inner surface; The surface of described warming plate 4 is coated with nano gas sorbing material layer 8, in order to remaining gases such as small amount of nitrogen, oxygen and carbon dioxide in the absorption vacuum-sealed cavity, thereby the internal vacuum of this special-shaped vacuum heat-insulating plate 2 is kept for a long time.
According to technical solution of the present invention, one or more of inorfils such as described warming plate 4 employing superfine glass fibres or alumina silicate fibre are made, and the average diameter of fiber is 2~4um, and density is 200~280kg/m
3, thermal conductivity factor is less than 0.010w/mk, and is lower than the thermal conductivity factor of materials such as traditional glass fibre, perforate polyurethane foam plastic, perforate polystyrene foam plastics, silica.Described high-isolation film layer 6 adopts OTR oxygen transmission rate and the extremely low composite of water vapour permeability to make, at least contain ethylene-vinyl alcohol copolymer in the composite, or contain multi-layer co-extruded polyester nanocomposites film at least, or contain noncrystalline polyamide resin membrane of lipoprotein at least.
The structure that constitutes composite membrane 3 can have multiple choices, and Fig. 3 and Fig. 4 have reflected wherein two kinds of structures.In the middle of Fig. 3, composite membrane 3 outwards comprises successively from the lining: 6,1 layers of nylon film protective layer 5 of 1 layers of polyethylene hot sealing layer, 7,3 floor height barrier film layers; In the middle of Fig. 4, composite membrane 3 outwards comprises successively from the lining: 6,2 layers of nylon film protective layer 5 of 1 layers of polyethylene hot sealing layer, 7,5 floor height barrier film layers.Be used to make the two-layer composite membrane 3 up and down of same vacuum heat-insulating plate 2, its layer structure can be identical, also can be different.
The present invention further provides the processing method of above-mentioned built-in integral special-shaped vacuum heat-insulating plate for icebox 2, may further comprise the steps successively:
1. various barrier films are combined into composite membrane 3 with high obstructing performance, the skin of composite membrane 3 is one or more layers nylon film protective layers 5, internal layer is a layer of polyethylene hot sealing layer 7, the intermediate layer is the 3-5 floor height barrier film layer 6 that dry method is composited, compound tense, coating adhesive between layer and the layer;
2. warming plate 4 is carried out the secondary bending process, form three sections fold-type structures of two horizontal clip pricked, three sections size and refrigerator refrigeration compressor 1 are complementary with the geometry of the isolated area of refrigerator inside storage area;
3. in warming plate 4 surface spraying nano gas absorption sprayings, the surface at warming plate 4 after both combinations forms nano gas sorbing material layer 8, dries processing then, makes water content be lower than 8 ‰;
4. cover warming plate 4 with the 1. described composite membrane 3 of step like bag shape cover, the polyethylene heat-sealing layer 7 of composite membrane 3 contacted with the nano gas sorbing material layer 8 of warming plate 4 outer surfaces when cover covered;
5. get rid of the air of above-mentioned bag shape component internal with the ultrahigh vacuum packaging machine, form high vacuum state, and under high vacuum state encapsulated moulding.
Step 5. after, can carry out secondary to the special-shaped vacuum heat-insulating plate after the moulding 2 as required and seal, and 11,12,13,14 4 sealing parts that may exist be carried out deburring, the composite membrane 3 that cutting is unnecessary.
During concrete the application, the integral special-shaped vacuum heat-insulating plate 2 of last moulding is placed the isolated area of refrigerator refrigeration compressor 1 and refrigerator inside storage area, is connected with other position such as refrigerator sidewall and locate, foam with blowing agents such as polyurethane then and fix.The polyurethane foam temperature with water fluence substantial connection arranged, the temperature that general refrigerator or incubator are poured into a mould reaches as high as 90 degrees centigrade, confirm through overtesting, use the integral special-shaped vacuum heat-insulating plate 2 that technical solution of the present invention is made, under 130 celsius temperatures, place and can not produce any damage and distortion in 20 minutes, can satisfy instructions for use fully.
Need to prove that in the above-mentioned specific embodiment, correlated condition is non-limiting condition, all can take the circumstances into consideration as the case may be in the actual application to select.Especially, the technology of the present invention thinking can promote the use of the equipment that refrigerator-freezer, refrigerator car, frozen products insulated container, freezer etc. comprise refrigeration compressor, can be according to the structure of thermal insulation areas around the refrigeration compressor, moulding to vacuum heat-insulating plate improves, it is abnormally-structured to form corresponding monoblock type, thereby the raising effect of heat insulation, reduction equipment uses energy consumption.