JPS6073281A - Vacuum heat-insulating box body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides a vacuum insulating structure which is constructed by using a flat plate-like vacuum insulation layer having a flexible filler material and a 1" hollow insulation layer formed by bending the same. This relates to an insulating box.

[Background of the invention]

Vacuum heat insulating materials are a structure with excellent heat insulating ability, and are mainly applied to thermos flasks, dual-use bottles, etc., which are effective in vacuum pressure resistance and whose outer containers are composed of spherical or cylindrical curved surfaces. Recently, flat vacuum insulation materials with spacers installed therein have been developed, but the heat conduction loss of the spacers increases. or,
There are defects such as increased heat loss through the outer panels of the four side corners, and when these are combined to form a box, there is a large heat loss due to vacuum insulation on small surfaces. in,
There were also defects that made the production cost relatively high. A monocoque structure in which the entire body is integrated is also conceivable.

The work is complicated and welding:? The airtight structure centered around 15 is a problem.

A conventional example will be explained with reference to FIGS. 1 and 2. 1 is a flat vacuum insulation plate, and 1a is a shallowly drawn outer plate made of a thin stainless steel plate.

1b is a flat plate-shaped outer plate +Fi1c is a spacer installed inside the outer plate 1a, and is a porous material 74 having a regular shape continuous body. 1d is an exhaust pipe welded to the outer plate 1a and is sealed after the inside of 2 is evacuated. 2 and 3 are flat vacuum insulation materials, the basic structure of which is the same as the flat vacuum insulation material 1. The only difference is in dimensions other than thickness.

Hanging flat plate vacuum insulation material l, 2. To construct a box with 3 and 3, arrange them as shown in Fig. 2, make 5 bodies, and provide a cover (not shown) on the outer periphery to integrate them to form a vacuum insulated box. It is.

In this configuration, since the spacer is a continuous body, its thermal conductivity is high, and it is not much different from general urethane foam insulation materials. In particular, the flat vacuum insulation material 2 is small in size, so the four-side corner As the dimensional ratio of the outer panels 1a and 1b increases, the rate of heat loss through the stainless steel materials of the outer panels 1a and 1b increases, significantly reducing the heat insulating function. In addition, there are three sizes in one box,
It required five flat vacuum insulation plates + J' 1.2 and 3, which resulted in relatively high processing costs and disadvantageous leakage control at welded parts.

Another conventional example will be explained with reference to FIGS. 3 and 4. 4 is a monocoque vacuum insulation box, 4a is 1, its outer box, 4b is its inner box, and 4C is its outer box. Plate 4a and inner box 4b
It is a porous material with a defined shape that is placed between the 4d is an exhaust pipe welded to the outer box 4a.

In order to create such a structure, the outer box 4a and the inner box 4b require deep drawing press processing. As a result, the heat leakage loss through the stainless steel material increases, the bifurcated element cost and the press processing cost increase, resulting in a defect that increases the cost.

[Purpose of the invention]

The present invention has been made to improve the above defects.

[Overview of inventions]

In other words, a part of the flat insulation material is bent into an L-shape or a U-shape, and this is combined with a flat vacuum insulation box to form two types of pentahedral box-shaped structures into three flat vacuum insulation boxes. This design eliminates the need for small-dimensional vacuum insulation materials, reduces corner heat loss, reduces processing costs, and reduces the rate of defective welds.

For this reason, the spacer is made of a flexible discontinuous material in the form of fibers or powder, and the stainless steel outer plate is constructed as a shallowly drawn thin plate structure.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 5, 6, and 7. The flat vacuum insulation layer 5a is a shallowly drawn outer plate made of stainless steel. 5b is a flat plate-like outer plate, and is composed of the same phase as 5a. 5C is an exhaust pipe, which is hermetically welded to the outer panel 5a. 5d is fibrous,
Or a spacer composed of a powdered flexible discontinuous body,
Glass wool, perlite, etc. are effective, but there are no particular restrictions on the species of this family.

To construct a flat plate-like vacuum insulation ('A5) using such members, first, an exhaust pipe 5c is hermetically welded to the outer plate 5a,
Four parts of the outer plate 5a are filled with spacers 5d, covered with the outer plate 5b, and the outer periphery is hermetically welded. After this, the exhaust pipe 5C is connected to a vacuum pump (not shown), and baking is performed while exhausting. When the degassing is completed, the exhaust pipe 5C
Pressure cut a part of it and seal it to complete it.

A part of this flat vacuum heat insulating material 5 is bent at right angles to form an L-shape when viewed from the side. This constitutes an L-shaped vacuum insulation material 5'. 6 is a flat plate vacuum insulation +A, its basics (1η
The structure is a flat plate vacuum insulation (-A5), the only difference is the dimension and the absence of L-shaped bending, but the specifications of one part are the same, and the length of each side is 1llii L-shaped insulation + A5
Each of the five bending dimensions L+ and L21 of ' is constructed to be equal.

Here, in order to construct the vacuum insulation box, two flat vacuum insulation materials 5' are used, and the surface shape of the +IIR visual field is shaped like a mouth, and the flat vacuum insulation material 6 is placed on the back side. Arrange and combine the rivers in Figure 7. Thereafter, the inner and outer surfaces are covered with covers (not shown) to complete the unit, but there are no particular restrictions on this structure.

In such a configuration, since the spacer 5d is a discontinuous body in the heat transfer direction, the contact thermal resistance becomes extremely large.Moreover, the outer plates 5a and 5b can be made of thin stainless steel plates, and the vacuum on the small dimension surface Insulation material.

The L-shaped structure allows it to be integrated with other surfaces, and the corner heat conduction loss is significantly reduced, so the insulation function is greatly improved and a box body with less heat loss can be constructed.

In addition, the box body can be constructed from two types of flat vacuum insulation materials 5' and 6, a total of three parts, and compared to the conventional example, the number of press-type or five pieces of one type is reduced by two, which increases processing costs. can be effectively reduced. Furthermore, the number and length of welds can be reduced, and vacuum maintenance and management become easier. Particularly when constructing a small box, the insulation ability and processing cost are significantly improved.

Further, one embodiment of the pond will be explained with reference to FIG. ' Lateral dimension of A7, L3
．． It is a flat vacuum insulation material whose dimensions are adjusted to L4 and L4, and has the same specifications as the flat vacuum insulation material 5 except for the external dimension 1 and the bent shape.

Even in the hanging structure, there are two types of vacuum insulation materials, a total of three pieces.
The box body can be constructed in the same manner as in the above invention, which is advantageous in terms of heat insulation function and processing.

〔Effect of the invention〕

As described above, a flat vacuum insulation material made of a thin stainless steel plate and a flexible spacer is bent into an L-shape or a U-shape, and this is combined with a flat vacuum insulation material to create a vacuum insulation box. By configuring the body, it has a high insulation function due to an increase in the contact thermal resistance of the spacer and a decrease in heat loss at the corners of the outer plate.The vacuum insulation 44 can be configured with 23 pieces of 2 types to form a box body, reducing processing costs. The effect of reducing the number of welds and length, and simplifying airtightness management is lacking.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional flat heat insulating material, Fig. 2 is a perspective view of a box made of the heat insulating material of Fig. 1, and Fig. 3 is a perspective view of another conventional example. Figure 4 is its vertical cross-sectional structural diagram, and Figure 5
The figure is a cross-sectional view of the flat heat insulating material of the present invention, and FIG.
FIG. 7 is a perspective view illustrating a combination of box structures, and FIG. 8 is a diagram illustrating a box structure according to another embodiment of the present invention. 5... Flat vacuum insulation material, 5a... Outer plate, 5b...
・Outer & -5c... Exhaust pipe, 5d... Spacer, 5'... L-shaped vacuum insulation material, 6... Flat vacuum insulation material, 7... U-shaped vacuum insulation material , Death...Flat vacuum insulation material. 1st calculation 2nd day 3rd figure 4 (γ b 5th figure b 5'C 6th figure 7th figure

Claims (1)

[Scope of Claims] ] An exhaust pipe (5C) is hermetically welded to a shallowly drawn thin stainless steel outer plate (5a), and these four parts (A, fibrous,
Alternatively, a powder-like flexible discontinuous spacer (5a) is installed inside, the outer plate (5b) is covered, the outer periphery is hermetically welded, and after internal degassing, a part of the exhaust pipe is processed. Pressure cut flat plate vacuum cutting '2! 'AjA (5) K is constructed, this is bent to form an L-shaped vacuum insulation material (5'), and this L-shaped vacuum insulation material (5') is combined with a flat plate-shaped vacuum insulation material (6). A vacuum insulated box body characterized by the following structure. 2. U-shaped vacuum insulation JFA (7) and flat plate 1"1
The vacuum insulation box according to claim 1, characterized in that it is constructed in combination with a hollow insulation material (8).