JPH0731669U - Variable insulation - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of this is to expand the application of the vacuum double container by losing or recovering its heat insulating function depending on the temperature. [Structure] One end of a heat-deformable element such as a bimetal is fixed to the outer surface of an inner container 1 of a vacuum double container, and the other end of the heat-deformable element is separated from the outer container 2 by a gap within the range of the amount of heat deformation. When the liquid or the like in the inner container 1 rises to a temperature above a certain level, the thermal deformation element is brought into contact with the outer container 2 to lose the heat insulating function, and conversely the temperature decreases. And tried to restore its function.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a variable heat insulating device that can lose or restore its heat insulating function in response to temperature changes in a heat insulating device using a vacuum double container.

[0002]

[Prior art]

 The metal vacuum double container used for thermos bottles has a heat insulating function by making the gap between the inner container and the outer container a vacuum, making it difficult to cool the hot water in the inner container.

As another application of the vacuum double container, for example, when it is used as a storage container for an automobile battery, it exerts a function of preventing cooling of the battery when the vehicle is stopped for a long time in a cold region. There is the convenience that the engine starts smoothly. However, since the temperature of the battery gradually rises after the engine is started, it is inconvenient for the storage container to have a heat insulating function, and it is necessary to lose the heat insulating function of the storage container when the temperature of the battery rises to a certain degree.

[0004]

[Problems to be solved by the device]

 However, since the conventional vacuum double container has only the heat insulating function and does not have the function of rapidly losing the function, it cannot be used as the storage container for the battery as described above.

In view of this, the present invention enables a heat insulating device using a vacuum double container to lose or recover its heat insulating function depending on the temperature, thereby expanding the application of the vacuum double container. Is an issue.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is directed to fixing one end of a heat-deformable element to an outer surface of an inner container or an inner surface of an outer container of a vacuum double container, The other end is made to face the inner surface of the outer container or the outer surface of the inner container with a gap within the range of thermal deformation.

[0007]

[Action]

 In the above variable heat insulation device, one end of the thermal deformation element is fixed to the outer surface of the inner container and the other end is opposed to the inner surface of the outer container, and the temperature of the substance stored in the inner container is below a certain temperature. At this time, the thermal deformation element does not operate, so there is vacuum insulation between the inner container and the outer container. When the temperature of the substance rises above a certain level, the thermal deformation element deforms and comes into contact with the outer container, so that the heat insulating function is lost. When the temperature of the substance drops below a certain level again, the thermal deformation element returns to the original state and the heat insulating function is restored.

Further, one in which one end of the heat deformable element is fixed to the inner surface of the outer container and the other end is opposed to the outer surface of the inner container, the heat deformable element is Since it does not work, there is heat insulation between the inner and outer containers. When the external temperature of the outer container rises above a certain level, the thermal deformation element deforms, and the heat insulating function between the outer container and the inner container is lost. Conversely, when the temperature decreases, the heat insulating function is restored.

[0009]

【Example】

 FIG. 1 shows a first embodiment, in which a variable heat insulating device is composed of a metal vacuum double container 3 including a container 1 having a cylindrical body and an outer container 2, and a bimetal unit 4. is there. The peripheral edges 5, 5'of the inner container 1 and the outer container 2 are welded over the entire circumference, and a constant gap is formed between the two containers 1, 2 in the other portions. The air in the gap portion is removed from the tip 6 on the bottom surface of the outer container 2, and the tip portion 6 is sealed to keep the gap portion in vacuum.

The bimetal unit 4 is of a cylindrical shape that is mounted on the outer peripheral surface of the inner container 1. As shown in FIG. 2, the bimetal unit 4 is provided at the upper end portion of the metal cylindrical portion 7 with a constant interval over the entire circumference. A cutout 8 is provided, a metal piece 9 cut and raised from the cutout 8 is raised parallel to the cylindrical portion 7, and a dissimilar metal piece 10 having a different coefficient of thermal expansion is fixed to the rising portion of the inner surface of the metal piece 9. Then, the bimetal 11 is formed.

One metal piece 9 of the bimetal 11 faces the inner surface of the outer container 2 in parallel with a slight gap, and when the temperature of the liquid or other substance in the inner container 1 is below a certain temperature, the outer container is opened. However, when the temperature rises above a certain level, it is deformed due to the difference in the coefficient of thermal expansion between the two metal pieces 9 and 10, and as shown by the chain double-dashed line in FIG. Contact. As a result, the inner container 1 and the outer container 2 are short-circuited, and heat is conducted between them, so that the heat insulating function is lost.

The heat insulating device having the heat insulating property as described above can be used, for example, as a storage container for a battery for an automobile. That is, when the temperature of the battery housed in the inner container 1 is low, the bimetal 11 is in a state before the deformation, and the inner container 1 and the outer container 2 are completely insulated from each other. When the battery is charged by the rotation of the engine and its temperature rises, the heat is conducted to the bimetal 11 through the inner container 1, and when the temperature reaches a certain temperature or higher, the metal piece 9 of the bimetal 11 is transferred to the inner surface of the outer container 2. Contact.

Therefore, the heat of the inner container 1 is radiated to the outside through the bimetal 11 and the outer container 2. When the engine stops and the temperature of the battery drops below a certain level, the bimetal 11 returns to its original state, so the vacuum insulation function between the inner container 1 and the outer container 2 is restored, and the temperature of the battery drops below a certain level. Prevent that.

Although the bimetal 11 is provided between the inner container 1 and the outer container 2 as the heat-deformable element, as another heat-deformable element, as in the second embodiment shown in FIG. It is also possible to use a 2-way type shape memory alloy element 12 formed in a shape. The required number of shape memory alloy elements 12 are arranged around the inner container 1, one end of which is fixed to the inner container 1, and the contact plate 13 attached to the other end is slightly spaced from the inner surface of the outer container 2. And make them face each other.

Also in this case, when the temperature of the inner container 1 rises above a certain level, the shape memory alloy element 12 extends and comes into contact with the outer container 2 to lose the heat insulating effect. On the contrary, when the temperature of the inner container 1 drops below a certain level, the element 12 returns to the original state, so that the heat insulating function is restored.

In the third embodiment shown in FIG. 5, one end of a bellows-shaped shape memory alloy element 12 ′ is fixed to the lower surface of the inner container 1 and the other end is slightly spaced from the bottom surface of the outer container 2. They are opposed to each other and have the same operation as that described above.

The fourth embodiment shown in FIG. 6 is a box type container formed by combining vacuum insulating double-wall panels 14, and one end of the bimetal 11 ′ is fixed to the inner wall 15 of each panel 14. However, the other end of the bimetal 11 ′ is opposed to the inner surface of the outer wall 16 with a slight gap. Also in this case, the same operation as that of each of the above-described embodiments is performed.

FIG. 7 shows a fifth embodiment. In this case, one end of the bimetal 11 ′ is attached to the inner wall 18 of the vacuum heat insulating double wall pipe 17 and the other end is opposed to the inner surface of the outer wall 19. Such a bimetal 11 'is provided along the length of the pipe 17 with a predetermined gap.

The “insulation double container” referred to in the present invention is a container formed by assembling the vacuum insulation double wall panel 14 as in the fourth embodiment or a vacuum insulation double wall pipe 17 as in the fifth embodiment. It also includes personal items.

In the fourth and fifth embodiments, a shape memory alloy element can be used instead of the pie metal 11 '.

Next, FIG. 8 shows a sixth embodiment. In each of the above-described embodiments, the bimetal 11, 11 ′ or the shape memory alloy element 12, 12 ′ is attached to the inner container 1, and these are thermally deformed according to the temperature of the inner container 1 and brought into contact with the outer container 2. However, in the case of the sixth embodiment, on the contrary, the bimetal unit 4 ′ is attached to the inner surface of the outer container 2 and the bimetal 11 is attached to the outer surface of the inner container 1. It comes into contact with or separates from.

In this case, the container can be used as, for example, a heat insulation container. That is, water is put into the inner container 1 and heated from the outside of the outer container 2. When the temperature of the outer container 2 becomes a certain temperature or more, each bimetal 11 is activated and heat is conducted to the inner container 1 to heat the water therein. When the heating of the outer container 2 is stopped and the temperature thereof falls below a certain level, each bimetal 11 returns to its original state, so that the heat insulating function is restored and the hot water is prevented from cooling.

Also in this case, a shape memory alloy element can be used instead of the bimetal 11 as in the case of the above-described embodiment.

[0024]

[Effect of device]

 As described above, according to the present invention, the vacuum heat insulating function between the vacuum heat insulating double containers can be lost or restored by the operation of the heat deformation element such as the bimetal or the shape memory alloy element. This has the effect of expanding the applications of the heat insulating double container.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a partial perspective view of the above bimetal unit.

FIG. 3 is a partially enlarged sectional view of the above.

FIG. 4 is a partially enlarged sectional view of a second embodiment.

FIG. 5 is a sectional view of the third embodiment.

FIG. 6 is a partially cutaway perspective view of a fourth embodiment.

FIG. 7 is a partially enlarged sectional view of a fifth embodiment.

FIG. 8 is a partially enlarged sectional view of a sixth embodiment.

[Explanation of symbols]

 1 Inner Container 2 Outer Container 3 Vacuum Double Container 4, 4'Bimetal Unit 5, 5'Opening Edge 6 Tip 7 Cylindrical 8 Notch 9 Metal Piece 10 Dissimilar Metal Piece 11, 11 'Bimetal 12, 12' Shape Memory Alloy element 13 Contact plate 14 Vacuum heat insulating double wall panel 15 Inner wall 16 Outer wall 17 Vacuum heat insulating double wall panel 18 Inner wall 19 Outer wall

Claims (1)

[Scope of utility model registration request] 1. A vacuum double container, wherein one end of a heat-deformable element is fixed to the outer surface of the inner container or the inner surface of the outer container, and the other end of the heat-deformable element is separated by a gap within the range of the amount of heat deformation. A variable heat insulating device that faces the inner surface of the container or the outer surface of the inner container.