JPS6231085Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vacuum insulated container in which the cross-sectional shapes of the inner tank and the outer tank can be formed into rectangular shapes. More specifically, although it touches the outer tank,
By using a reinforcing frame material that does not come into contact with the inner tank, the insulation performance of vacuum insulation is not impaired, and even though it is a square cylinder, the outer tank can withstand the atmospheric pressure that is applied to it, and the outer tank is effectively It relates to technology that prevents deformation.

Conventionally, vacuum insulated containers, such as thermos flasks,
Both the inner and outer tanks are cylindrical, and the reason for this is that in a rectangular cylinder type, the outer tank in particular deforms significantly due to the force exerted by atmospheric pressure, and in order to prevent this deformation, it is necessary to use extremely thick material. This resulted in the weight becoming too large. Although a cylindrical vacuum insulated container is stable when standing still, it is not sufficiently stable under vibrations such as in a vehicle. On the other hand, if the cylindrical type is placed horizontally,
It has the disadvantage that it rolls easily and is difficult to use safely in vibrating conditions.

Therefore, a square-shaped insulated container was needed, but there are conventional square-shaped insulated containers that do not use vacuum insulation but instead use foamed urethane as an insulating material. In addition, compared to the cylindrical type, the surface area of the square cylinder type is 1.13 times larger for the same internal volume, so the heat inside the container is easily lost due to heat conduction, making it difficult to make an excellent insulating container.

In the present invention, although the outer tank of a rectangular cylindrical vacuum insulated container is significantly deformed due to external pressure, the deformation due to the internal pressure applied to the inner tank is not as severe as the deformation of the outer tank, and even if there is some deformation, it does not affect the appearance. , we focused on the fact that this would not be a problem at all, and by using reinforcing frame material only on the inside of the outer tank, we created a corner that is relatively light in weight and has excellent insulation performance due to the vacuum space inside the inner and outer tanks. The present invention provides a type of vacuum insulated container.

That is, the present invention aims to provide a rectangular vacuum insulated container in which the outer tank does not substantially deform even if a vacuum is created between the inner and outer tanks by using a reinforcing frame material that is in contact with the outer tank but not in contact with the inner tank. It is.

In the rectangular vacuum insulated container of the present invention, both the inner tank and the outer tank are closed at their lower ends, forming a horizontal bottom, and narrow at the opening at the upper end. They are connected via a cylindrical or prismatic insulated pipe. That is, the inner tank is enclosed within the outer tank with a vacuum space in between, and is supported by a heat insulating pipe connected to the opening at its upper end, and its bottom does not touch the bottom of the outer tank. The heat insulating pipe is shielded by a heat insulating lid being inserted in an airtight state at the upper end opening.

In this case, it is also possible to mold the inner tank and the heat insulating pipe as one piece.

It is preferable to use a metal with low thermal conductivity such as stainless steel or a light metal such as aluminum as the material for the inner and outer tanks, and for the insulating pipe, use a material with low thermal conductivity such as FRP, stainless steel, or Invernickel steel. It is desirable to use

In order to reduce the weight of the reinforcing frame material of the present invention, several square annular members are suspended horizontally so as to be in contact with the inner wall of the outer tank.

The vertical cross section of the annular reinforcing frame material is U if it has the strength to prevent substantial deformation of the outer tank.
It may be of any shape, such as H-shaped, H-shaped, L-shaped, mouth-shaped, or wave-shaped.

The structure of the rectangular vacuum insulated container of the present invention will be described with reference to the following examples.

A rectangular cylindrical inner tank 7 also made of an aluminum plate with a thickness of 0.6 mm is enclosed in a rectangular cylindrical outer tank 6 made of an aluminum plate with a thickness of about 0.4 mm. ', 6') are connected via a heat insulating pipe 3 made of glass fiber reinforced epoxy resin.
The insulating pipe 3, the upper opening 6' of the outer tank, and the upper opening 7' of the inner tank are kept airtight using O-rings 4 and 2 to withstand vacuum, respectively. In addition, in methods other than this example, the inner and outer tanks are made of stainless steel,
O
It is also possible to manufacture a structure that maintains airtightness by welding without using a ring.

Seven rectangular annular reinforcing members 5 made of duralumin and having a U-shaped vertical cross section are used, which are in contact with the outer tank 6 but not in contact with the inner tank 7, so that the inner wall of the outer tank 6 has equal vertical distances. insert.

Furthermore, in order to completely block the conduction of heat from the outer tank 6 to the inner tank 7, it is desirable to provide a radiation heat insulating board 8 such as a stainless steel plate along the inside of the reinforcing frame material 5 and attach it to the reinforcing frame material 5. .

According to the embodiments described above, it is possible to obtain a rectangular vacuum insulated container that has a high heat retention ability, does not roll even if it is laid down, and has an outer container that is not substantially deformed by withstanding the pressure of the outside air.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the rectangular insulated container of the present invention, FIG. 2 is a top view of the rectangular insulated container of the present invention, and FIG. 3 is a cross-sectional view of the rectangular insulated container of the present invention. FIG. The correspondence between the main parts illustrated and the symbols is as follows. 1... Insulation lid, 2... Upper O-ring, 3...
Insulated pipe, 4...Lower O-ring, 5...Reinforcement frame material, 6...Outer tank, 7...Inner tank, 8...Radiation heat insulation plate, 9...Inner tank welded part, 10...Outer tank welded Part 1
1... Inner tank bottom plate, 12... Outer tank bottom plate, 13... Vacuum insulation section.

Claims (1)

[Scope of utility model registration request] A square vacuum insulated container consisting of a square cylindrical outer tank, a square cylindrical inner tank contained within it, an insulating lid press-fitted into the upper opening of the inner tank, and a reinforcing frame material that is in contact with the outer tank but not in contact with the inner tank. 1. A rectangular vacuum insulated container characterized in that the outer container does not substantially deform even if the space between the inner and outer containers is evacuated.