JPH06100051A - Heat-insulating vacuum container - Google Patents

Abstract

PURPOSE:To reduce the breakage of the membrane due to thermal expansion, unify the temperature in the container, and in addition, utilize the inside space effectively, for a vacuum heat-insulating container. CONSTITUTION:For a vacuum heat-insulating container 1 which has a vacuum heat-insulating space 9 between an external container 8 and an internal container 10, and for which the opening end surface of the vacuum heat-insulating space 9 is sealed by a membrane 12, and a heat-insulating lid 16 is provided at the opening, a plurality of heat-source storage grooves 14 which are formed to be able to absorb the thermal expansion are provided on the inner periphery of an inner wall surface 13 of the internal container 10, and a heat source 15 is provided in the heat source storage groove 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vacuum heat insulation container,
In particular, the present invention relates to a vacuum heat insulating container for keeping heat which is used at a high temperature or a low temperature.

[0002]

2. Description of the Related Art Conventionally, a vacuum heat insulating container of this type has a vacuum heat insulating space 3 between an outer container 1 and an inner container 2, as shown in FIG. The outer container 1 and the inner container 2 are hermetically sealed with a membrane 4, and an opening 5 of the inner container 2 is provided with a heat insulating lid 6 with a flange.
A heater 7 is provided in the space inside the inner container 2 in order to control the temperature inside the container 2.
The vacuum heat insulating space 3 is a space in a vacuum state filled with a heat insulating material such as fibrous or powdery material, and keeps the internal temperature of the inner container 2 constant. In such a vacuum heat insulating container, the thermal expansion and contraction generated in the inner container 2 due to the temperature change inside is absorbed by the rear side of the inner container 2 due to the expansion and contraction of the inner side portion of the inner container 2 and the remaining half. Half is the opening 5 of the inner container 2
It is absorbed as the side part expands and contracts. At that time, the membrane 4 is deformed as shown in FIG.

[0003]

However, in the above-mentioned conventional vacuum insulation container, the membrane may be fatigued and damaged by repeated heating and cooling, and in order to have a structure resistant to thermal expansion and contraction, the membrane should be There was a problem that it became a complicated structure. Further, since a heat source such as a heater is provided at a specific position in the space inside the inner container, there is a problem that temperature unevenness occurs inside the container and the effective space inside the container decreases.

The present invention solves the above-mentioned problems by reducing the fatigue of the membrane with a relatively simple structure against deformation due to temperature change in the vacuum heat insulation container, and by making the temperature inside the container uniform. The purpose is to make effective use of the space.

[0005]

In order to solve the above problems, the present invention has a vacuum heat insulating space between an outer container and an inner container, and the opening end face of this vacuum heat insulating space is sealed with a membrane, A vacuum heat insulating container having a heat insulating lid in its opening, wherein a plurality of heat source storage grooves formed to absorb thermal expansion and contraction are provided on the inner circumference of the inner wall surface of the inner container, and heat sources are provided in the heat source storage grooves. Is.

[0006]

With the above structure, a plurality of heat-source accommodating grooves are provided on the inner circumference of the inner wall surface of the inner container, and since these grooves are formed so as to be able to absorb the thermal expansion and contraction, the thermal expansion and contraction is absorbed by the grooves, and the deformation of the membrane is caused. Is smaller, the strength is improved. In addition, the temperature inside the container becomes uniform by providing the heat sources in the plurality of heat source housing grooves, respectively. Furthermore, by disposing the heat source in the heat source housing groove, the convex portion is eliminated in the inner container, and the space can be effectively used.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a vacuum insulation container,
It is composed of an outer container 8 and an inner container 10 arranged with a vacuum heat insulation space 9 provided between the outer container 8 and the outer container 8. The vacuum heat insulating space 9 is filled with a powder type filler 11 as a spacer and then evacuated. A fiber-based filler may be used as the spacer. The opening end of the inner container 10 and the opening end of the outer container 8 are connected by a membrane 12, and the opening of the vacuum heat insulating space 9 is closed.

Grooves 14 projecting toward the vacuum heat insulating space 9 are formed on the inner circumference of the inner wall surface 13 of the inner container 10 over the entire circumference of the inner container 10 and at equal pitches in the depth direction of the inner container 10. Is provided in multiple. The groove portion 14 has a cross-sectional shape such as a semicircle or a triangle as shown in FIG. 2 or FIG. 3, and is formed so that the heater 15 can be housed therein. A heater fixing metal fitting 16 is attached to the opening of the groove portion 14 so as to cover the opening. The heater fixing member 16 is fixed on one side in the vicinity of the groove portion 14, and the other side is free.

The operation of the above configuration will be described. Inner container
When the internal temperature of 10 becomes high, the inner container 10 thermally expands, but half of it is absorbed by the deformation of the inner container 10 toward the inner side, and the other half is toward the opening of the inner container 10. Appears as thermal expansion. At this time, since the groove portion 14 is provided, the groove portion having the shape shown by the dotted line in FIG.
Since 14 deforms to the shape of a solid line to absorb the expansion of the inner container 10 and the expansion at the opening portion of the inner container 10 is reduced, the deformation of the membrane 12 is also small. Therefore, the membrane 12
Fatigue is reduced.

When the vacuum heat insulating container is used for low temperature, a refrigerant circulation pipe can be provided instead of the heater 15. Even in this case, the inner container is
Half of the contraction of 10 is effectively absorbed by the deformation of the groove portion 14, and the contraction at the opening portion of the inner container 10 is reduced,
The deformation of the membrane 12 is also reduced, and its fatigue is reduced.

Further, at this time, since a plurality of groove portions 14 are provided on the inner circumference of the inner wall surface 13 of the inner container 10, the above thermal expansion and contraction are dispersed and absorbed, and fatigue of the groove portion 14 is small. Further, since the heater 15 or the refrigerant circulation pipe is provided inside the plurality of groove portions 14 and the opening is covered with the heater fixing metal fitting 16, the heater 15 or the refrigerant circulation pipe uniformly heats or cools the internal space, and Does not protrude into the internal space.

[0012]

As described above, according to the present invention, the thermal expansion and contraction of the inner container due to the temperature change of the internal space can be effectively absorbed by the deformation of the heat source storage groove, and as a result, the deformation of the membrane can be prevented. Since it becomes smaller, the fatigue is reduced and the damage of the membrane is less likely to occur. Further, since a plurality of heat source storage grooves are provided and the heat sources are provided inside thereof, the internal space of the container is uniformly heated or cooled, and temperature unevenness is eliminated. Furthermore, since the heat source does not protrude into the internal space as in the conventional case, a large space can be used.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a vacuum heat insulating container according to an embodiment of the present invention.

FIG. 2 is a view showing an example of a heat source storage groove provided in the vacuum heat insulating container of FIG.

FIG. 3 is a view showing another embodiment of the heat source storage groove provided in the vacuum heat insulating container of FIG.

FIG. 4 is an explanatory diagram showing a difference in deformation of the membrane between the vacuum heat insulating container according to the present invention and the conventional vacuum heat insulating container.

FIG. 5 is a vertical sectional view showing a schematic configuration of a conventional vacuum heat insulating container.

[Explanation of symbols]

 1 vacuum insulation container 8 outer container 9 vacuum insulation space 10 inner container 12 membrane 13 inner wall surface 14 heat source storage groove 15 heat source 16 heat insulation lid

Claims (1)

[Claims] 1. A vacuum heat insulating container having a vacuum heat insulating space between an outer container and an inner container, wherein an end face of an opening of the vacuum heat insulating space is sealed with a membrane, and a heat insulating lid is provided at the opening,
A vacuum heat insulating container, characterized in that a plurality of heat source storage grooves formed so as to absorb thermal expansion and contraction are provided on the inner circumference of the inner wall surface of the inner container, and heat sources are provided in the heat source storage grooves.