JPH07172478A - Heat insulating container - Google Patents

Abstract

PURPOSE:To reduce the unevenness of the temp. of the contents of a heat insulating container when the inner container temp. is adjusted by a method wherein the gap between the peripheral edge of an opening part formed in the outer wall and the inner wall is sealed to form a nonvacuous heat-insulating part in communication with outside and an opening and closing body is provided to vary the opening area of the opening part. CONSTITUTION:In a case where an exothermic reaction of the contents of a heat insulating container 1 takes place to raise the temp. inside the container 1, a shutter 14 is moved to open the opening part 8 as shown by imaginary lines, whereby the heat inside the container 1 is transmitted from an inner case 2 to the non-vacuous heat insulating part 11 and is dissipated from there through the opening part 8 to outside the container 1. Since in this way the heat inside the heat insulating container 1 is dissipated through the inner case 2 indirectly to outside, the inside of the container 1 is cooled nearly evenly to permit the unevenness of the content temp. to be reduced. When the opening degree of the shutter 14 is varied to change the opening area of the opening part 8, since the amount of the heat dissipating from the opening part 8 can be adjusted, a delicate temp. adjustment can be effected according to the degrees of the temp. inside the heat insulating container 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating container having a vacuum heat insulating portion between an inner wall and an outer wall and capable of adjusting the temperature inside.

[0002]

2. Description of the Related Art Conventionally, there is a heat insulating container of this type shown in FIG. That is, the heat insulating container 41 is formed in a square box shape with the front opening by the inner box 42 as an inner wall and the outer box 43 as an outer wall. An end member 44 seals between the front end of the inner box 42 and the front end of the outer box 43.
A vacuum heat insulating section 45 is provided between the outer box 43 and the outer box 43.
A detachable lid 46 is attached to the opening of the heat insulating container 41. The lid 46 is provided with an air supply pipe 47 that penetrates the lid 46 from the outside and communicates with the inside of the heat insulating container 41, and an exhaust pipe 48 that penetrates the lid 46 from the inside of the heat insulating container 41 and communicates with the outside. ing. A blower device 49 for supplying cooling air is provided at the outer end of the air supply pipe 47. Further, the air supply pipe 47 and the exhaust pipe 48 are provided with an air supply valve 50 and an exhaust valve 51 which can be opened and closed, respectively.

According to this, when the contents 52 stored inside the heat insulating container 41 cause an exothermic reaction and the internal temperature of the heat insulating container 41 rises, the air supply valve 50 and the exhaust valve 51 are opened, and the blower is opened. Activate device 49. As a result, the outside air is supplied from the blower device 49 to the inside of the heat insulating container 41 via the air supply pipe 47, and the air inside the heat insulating container 41 is exhausted to the outside from the exhaust pipe 48. Therefore, the insulation container 41
The inside of the container was ventilated and cooled, and the internal temperature of the heat insulating container 41 was kept constant.

[0004]

However, in the above-mentioned conventional type, as shown by the hatched portion A in FIG.
There is a problem that an extreme unevenness in the temperature distribution of the stored items 52 is locally caused because a part of each of them directly contacts the cooling air supplied from the outside.

As shown in FIG. 10, when the depth dimension of the inner box 42 is L and the inner box 2 is thermally expanded by ΔL as a whole,
The inner box 2 is displaced forward and backward by ΔL / 2. The repeated occurrence of such displacement may shorten the life of the end member 44.

The present invention solves the above problems, and an object of the present invention is to provide a heat insulating container capable of reducing the temperature unevenness of the stored items when adjusting the temperature in the heat insulating container.

[0007]

In order to solve the above problems, the first aspect of the present invention provides a heat insulating container having an inner wall, an outer wall, and a vacuum heat insulating portion provided between the inner wall and the outer wall. An opening is formed in the outer wall, and a non-vacuum heat insulating portion that communicates with the outside is formed by sealing a space between a peripheral edge of the opening and the inner wall with a sealing plate, and the outer wall has an opening area of the opening. It is provided with an opening / closing body for changing the.

The second aspect of the present invention is a heat insulating container having an inner wall, an outer wall, and a vacuum heat insulating portion provided between the inner wall and the outer wall, wherein an opening is formed in the outer wall, and the opening is formed. A non-vacuum heat insulating portion communicating with the outside is formed by sealing a space between a peripheral edge of the portion and the inner wall with a sealing plate, and the non-vacuum heat insulating portion is provided with a refrigerant pipe in contact with the inner wall.

[0009]

According to the first aspect of the present invention, when the contents stored in the heat insulating container cause an exothermic reaction and the internal temperature of the heat insulating container rises, the opening / closing body is opened,
The heat in the heat insulating container is transferred from the inner wall to the non-vacuum heat insulating portion, and further dissipated from the non-vacuum heat insulating portion to the outside of the heat insulating container through the opening. In this way, since the heat in the heat insulating container is indirectly radiated to the outside through the inner wall, the inside of the heat insulating container is cooled substantially uniformly, and the temperature unevenness of the stored items can be reduced. Further, the amount of heat radiated from the opening can be adjusted by changing the opening of the opening / closing body to change the opening area of the opening.

According to the structure of the second aspect of the present invention, when the contents stored in the heat insulating container cause an exothermic reaction and the internal temperature of the heat insulating container rises, the refrigerant is circulated through the refrigerant pipe to make the heat insulating container. The heat inside is transferred from the inner wall to the refrigerant pipe and taken away by the refrigerant. In this way, the heat in the heat insulating container is indirectly taken by the refrigerant through the inner wall, so that the heat insulating container is cooled substantially uniformly, and the temperature unevenness of the stored items can be reduced. Also, the amount of heat taken from the inner wall can be adjusted by changing the flow rate of the refrigerant.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The heat insulating container 1 has an inner box 2 as an inner wall.
The outer box 3 serving as an outer wall is formed into a double-sided rectangular box shape having an opening at the front, and accommodates high-temperature objects inside. A detachable lid 4 is attached to the opening of the heat insulating container 1. A front end of the inner box 2 and a front end of the outer box 3 are sealed by an end member 5 having a U-shaped cross section, and a vacuum heat insulating portion 6 is provided between the inner box 2 and the outer box 3. Is provided. The end member 5 is formed to be thinner than the inner case 2 and the outer case 3.

An opening 8 is formed in the central portion of the outer box 3 over the entire circumference in the circumferential direction with respect to the longitudinal axis 9. A sealing plate 10 seals between the front edge of the opening 8 and the inner box 2, and between the rear edge of the opening 8 and the inner box 2. Each of these sealing plates 10 has a U-shaped vertical cross section, and has a rectangular frame shape in a front view. A non-vacuum heat insulating portion 11 communicating with the outside is formed between the pair of front and rear sealing plates 10. As a result, the vacuum heat insulating portion 6 is divided into two parts, the front and rear, centering on the non-vacuum heat insulating portion 11. Further, the inner box 2 is also divided into two parts in the front and rear at the location where the non-vacuum heat insulating part 11 is formed and integrally joined by welding 12. The thickness of the sealing plate 10 is smaller than that of the inner box 2 and the outer box 3.

The outer box 3 is provided with a shutter 14 which can be moved back and forth as an example of an opening / closing body for changing the opening area of the opening 8. This shutter 14 is the outer box 3
It is held by the bracket 15 attached to the outer peripheral surface of
The bracket 15 is provided with a motor and a cylinder (not shown) which are drive devices for opening and closing the shutter 14.

The operation of the above structure will be described below.
When the contents stored in the heat insulating container 1 cause an exothermic reaction and the internal temperature of the heat insulating container 1 rises, the shutter 14 is moved forward to open the opening 8 as shown by the phantom line in FIG. As a result, the heat inside the heat insulating container 1 is
From the non-vacuum heat insulating portion 11 to the outside of the heat insulating container 1 through the opening 8. In this way, since the heat inside the heat insulating container 1 is indirectly radiated to the outside through the inner box 2, the inside of the heat insulating container 1 is cooled substantially uniformly, and the temperature unevenness of the stored items can be reduced. Further, since the amount of heat dissipated from the opening 8 can be adjusted by changing the opening area of the opening 8 by changing the opening of the shutter 14, it is possible to make a delicate adjustment according to the internal temperature of the heat insulating container 1. The temperature can be adjusted.

When the inside of the heat insulating container 1 is cooled to a predetermined temperature, the shutter 14 is moved rearward to close the opening 8 as shown by the solid line in FIG. 1 to dissipate the heat from the opening 8. Can be suppressed. Thereby, the inside of the heat insulating container 1 is maintained at a predetermined temperature.

Further, as shown in FIG. 1, the depth dimension of the inner box 2 is set to L, and a welding 12 for joining the front half and the rear half of the inner box 2 is provided at the position of L / 2, and the inner box 2 is When the total amount of thermal expansion is ΔL, according to the present embodiment, the displacement amount of each sealing plate 10 and the end member 5 becomes approximately ΔL / 4 as shown in FIG. 3, and the end of the conventional example shown in FIG. Since the displacement amount of the member 44 is smaller than ΔL / 2, the service life for repeated use is extended.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, a part of the non-vacuum heat insulating part 11 is filled with the atmospheric pressure heat insulating material 20 which is in contact with the inner box 2. According to this, if the amount of heat dissipated when the shutter 14 is open is too large, a part of this amount of heat dissipated will be used for normal pressure insulation.
Since it can be shut off by 20, it is possible to prevent an excessive amount of heat from being dissipated. Further, even when the shutter 14 is closed, if heat gradually escapes from the non-vacuum heat insulating portion 11, the atmospheric pressure heat insulating material 20 can prevent the heat from escaping.

Next, a third embodiment of the present invention will be described with reference to FIGS.
It will be described based on. In the first mentioned embodiment,
Although the opening 8 is formed over the entire circumference of the outer box 3,
In this embodiment, the opening 8 is formed only in a part of the outer box 3 as shown in FIGS. That is, the circular opening 8 is formed in the ceiling surface 25 of the outer box 3. The periphery of the opening 8 and the inner box 2 are sealed by a ring-shaped sealing plate 10. As a result, the non-vacuum heat insulating portion 11 communicating with the outside is formed surrounded by the sealing plate 10.
Further, the inner box 2 is not divided into the front half and the rear half as in the first embodiment, but is formed as an integral body.

According to this, when the inner volume of the heat insulating container 1 is small or the adjustment range of the internal temperature is relatively small,
By forming the opening 8 only in a part of the outer box 3, the internal temperature can be adjusted sufficiently. Therefore, as compared with the case where the opening 8 is formed over the entire circumference of the outer box 3 as in the first embodiment, the opening 8, the shutter 14 and the bracket 15 can be downsized, and the shutter 14 can be further downsized. Since the driving force required for opening and closing can be reduced, the cost can be reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
It will be described based on. A refrigerant pipe 30 that is in contact with the outer peripheral surface of the inner box 2 is wound around the non-vacuum heat insulating portion 11 over the entire circumference. The refrigerant circulates inside the refrigerant pipe 30. The non-vacuum heat insulating section 11 is filled with the atmospheric pressure heat insulating material 20, and the refrigerant pipe 30 is embedded in the atmospheric pressure heat insulating material 20. A detachable cover 31 is attached to the opening 8. The inflow side end portion 30a and the outflow side end portion 30b of the refrigerant pipe 30 are led out from the non-vacuum heat insulating portion 11 through the cover 31 to the outside. Inflow end 30 of the refrigerant pipe 30
A valve 34 for adjusting the flow rate of the refrigerant is provided further upstream of a.

According to this, when the contents stored in the heat insulating container 1 cause an exothermic reaction and the internal temperature of the heat insulating container 1 rises, the valve 34 is opened to allow the refrigerant to flow into the refrigerant pipe 30. As a result, the heat inside the heat insulating container 1 is transferred from the inner box 2 to the refrigerant pipe 30 and taken away by the refrigerant. In this way, the heat inside the heat insulating container 1 is indirectly taken by the refrigerant through the inner box 2, so that the inside of the heat insulating container 1 is cooled substantially uniformly, and the temperature unevenness of the stored items can be reduced. Further, since the amount of heat taken from the inner box 2 can be adjusted by changing the flow rate of the refrigerant with the valve 34, it is possible to make a delicate temperature adjustment according to the state of the internal temperature of the heat insulating container 1.

When the inside of the heat insulating container 1 is cooled to a predetermined temperature, the amount of heat taken from the inner box 2 can be suppressed by closing the valve 34. Thereby, the inside of the heat insulating container 1 is maintained at a predetermined temperature. At this time, non-vacuum insulation part
11 is filled with atmospheric pressure insulation material 20 and the opening 8 is covered 31
Since it is covered by the cover, it is possible to block even a small amount of heat that escapes from the inner box 2 to the outside through the non-vacuum heat insulating section 11.

Although the refrigerant pipe 30 is wound around the entire outer surface of the inner box 2 in the fourth embodiment, it may be attached only to a part of the outer surface of the inner box 2.

[0024]

As described above, according to the first aspect of the present invention, when the contents stored in the heat insulating container cause an exothermic reaction and the internal temperature of the heat insulating container rises, the opening / closing body is opened, The heat in the heat insulating container is transferred from the inner wall to the non-vacuum heat insulating portion, and further dissipated from the non-vacuum heat insulating portion to the outside of the heat insulating container through the opening. In this way, since the heat in the heat insulating container is indirectly radiated to the outside through the inner wall, the inside of the heat insulating container is cooled substantially uniformly, and the temperature unevenness of the stored items can be reduced. In addition, the amount of heat dissipated from the opening can be adjusted by changing the opening area of the opening and closing body to change the opening area of the opening. It will be possible.

Further, according to the second aspect of the present invention, when the contents stored in the heat insulating container cause an exothermic reaction and the internal temperature of the heat insulating container rises, the refrigerant is circulated through the refrigerant pipe to make the heat insulating container. The heat inside is transferred from the inner wall to the refrigerant pipe and taken away by the refrigerant. In this way, the heat in the heat insulating container is indirectly taken by the refrigerant through the inner wall, so that the heat insulating container is cooled substantially uniformly, and the temperature unevenness of the stored items can be reduced. Further, since the amount of heat taken from the inner wall can be adjusted by changing the flow rate of the refrigerant, it is possible to finely adjust the temperature according to the state of the internal temperature of the heat insulating container.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the heat insulating container.

FIG. 3 is a partially enlarged sectional view of the heat insulating container.

FIG. 4 is an enlarged cross-sectional view of a non-vacuum heat insulating portion of a heat insulating container according to a second embodiment.

FIG. 5 is a partially cutaway plan view of a heat insulating container according to a third embodiment.

FIG. 6 is an enlarged cross-sectional view of a non-vacuum heat insulating portion of the heat insulating container.

FIG. 7 is a sectional view of a heat insulating container according to a fourth embodiment.

FIG. 8 is a perspective view of the heat insulating container.

FIG. 9 is a cross-sectional view of a heat insulating container in a conventional example.

FIG. 10 is a cross-sectional view showing thermal expansion of an inner box in a conventional example.

[Explanation of symbols]

 1 Insulation container 2 Inner box (inner wall) 3 Outer box (outer wall) 6 Vacuum heat insulating part 8 Opening part 10 Sealing plate 11 Non-vacuum heat insulating part 14 Shutter (opening / closing body) 30 Refrigerant piping

Claims (2)

[Claims] 1. A heat insulating container comprising an inner wall, an outer wall, and a vacuum heat insulating portion provided between the inner wall and the outer wall, wherein an opening is formed in the outer wall, and a peripheral edge of the opening is formed. A heat-insulating container characterized in that a non-vacuum heat insulating portion communicating with the outside is formed by sealing a space between the inner wall and the inner wall with a sealing plate, and an opening / closing body for changing the opening area of the opening is provided on the outer wall. 2. A heat insulating container comprising an inner wall, an outer wall, and a vacuum heat insulating portion provided between the inner wall and the outer wall, wherein an opening is formed in the outer wall, and a peripheral edge of the opening is formed. A non-vacuum heat insulating portion that communicates with the outside is formed by sealing a space between the inner wall and a sealing plate, and a refrigerant pipe that is in contact with the inner wall is provided in the non-vacuum heat insulating portion.