JPH0226429Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a vacuum double bottle used as a heat-insulating container such as a lunch jar or a thermos flask.

"Prior Art and its Problems" As shown in Figures 3 and 4, thermos containers such as thermos flask 1 and lunch jar 2 are
is widely used. The vacuum double bottle 3 has an inner cylinder 4
and an outer cylinder 5 are integrally joined at an opening 6, and the space between the inner and outer cylinders 4 and 5 is a vacuum insulation layer 7,
The vacuum heat insulating layer 7 is intended to keep the objects housed in the inner cylinder 4 warm.

However, in the case of such a vacuum double bottle 3, the heat of the stored contents is transferred from the inner cylinder 4 to the outer cylinder 5 via the joint 8 between the inner and outer cylinders 4 and 5, resulting in a decrease in heat retention performance. There is a problem. This problem is particularly serious when the inner tube 4 and the outer tube 5 are made of metal, so in the case of a metal thermos flask, the inner tube 4 is sealed with an inner stopper 9 at a position below the opening 6. The inner cylinder 4 is divided into a contents storage part 11 and a mouth part 12 by providing a seal part 10. In the case of such a vacuum double bottle 3, by forming the length of the mouth part 12 from the opening part 6 to the seal part 10 to be long, the contents can be removed from the contents storage part 11 through the mouth part 8. Since the amount of heat transferred to the cylinder 5 is reduced, this vacuum double bottle has excellent heat retention performance.

However, in such a vacuum double bottle 3,
Since the inner cylinder 4 has a mouth 12 that cannot accommodate the contents, the capacity for accommodating the contents in the inner cylinder 4 becomes small, and the vacuum double bottle has a low volumetric efficiency, which has caused some dissatisfaction.

``Purpose of the invention'' This invention was made in view of the above circumstances.
The purpose is to provide a vacuum double bottle with excellent heat retention performance and good volumetric efficiency.

"Means for Solving the Problems" The vacuum double bottle according to this invention has a recess that is bent in the vacuum insulation layer and opens outward from the opening of the inner cylinder and the outer cylinder. The above-mentioned problem is solved by joining the parts through a joining member and filling the recess of the joining member with a heat insulating member.

``Function'' The vacuum double bottle of this invention has the openings of the inner and outer cylinders
They are joined via a joining member that has a recess filled with a heat insulating material, thereby increasing the heat transfer distance between the inner and outer cylinders and preventing heat radiation from the joint, making it different from conventional vacuum double bottles. In order to improve the heat retention performance, there is no need to form a long opening in the inner cylinder that cannot accommodate the contents. Therefore,
The vacuum double bottle of this invention has excellent heat retention performance and high volumetric efficiency.

"Embodiment 1" FIG. 1 shows a first embodiment of a heat-insulating container equipped with a vacuum double bottle of this invention, and reference numeral 20 in the figure indicates the vacuum double bottle. This vacuum double bottle 20 consists of an inner cylinder 21 and an outer cylinder 22 made of metal. The inner cylinder 21 and the outer cylinder 22 of this vacuum double bottle 20 are welded together at the opening 6 via a joining member 23. This joining member 23 is arranged along the periphery of the opening 6, has an annular overall shape, and has a substantially U-shaped cross section. The upper end opening side of the U-shaped cross section of this joining member 23 is slightly widened, and both ends of the upper end opening side are formed into an inner cylinder so that the U bottom part hangs down into the vacuum insulation layer 7 between the inner and outer cylinders 21 and 22. 21 and the outer cylinder 22, respectively. Further, a heat insulating member 24 is provided in the concave portion of the joining member 23 having a U-shaped cross section.
is filled, and a gasket 25 is fitted into the opening at the upper end. The insulation member 24 is
It prevents heat radiation from the joining member 23, and is made of a material with excellent heat insulation properties such as urethane foam and polyethylene foam. Also, Patsukin 25
This airtightly seals the concave portion of the joining member 23 filled with the heat insulating member 24, and also seals the vacuum double bottle 20.
This prevents heat from being conducted from the double bottle 20 to the outer case 26 that houses the double bottle 20, and also prevents liquid from leaking between them. This packing 25 is formed into an annular shape using an elastic member such as rubber.

The exterior case 26 includes a bottom member 27 having a cylindrical shape and a shoulder member 28 attached to the upper end thereof. The shoulder member 28 has a substantially L-shaped cross section, and is attached to the bottom member 27 so that one end of the shoulder member 28 protrudes inward from the upper end opening of the bottom member 27.
A vacuum double bottle 20 is attached to the lower surface of one end via the packing 25 mentioned above. Further, an upper lid 30 is provided on the upper surface side of the shoulder member 28 via a hinge member 29. A stopper 32 housing a heat insulating body 31 is provided on the inner surface of the upper lid 30, and the stopper 32 has a circumferential surface that contacts the upper surface 28a of the shoulder member 28 to open the opening of the heat insulating container. An O-ring 33 is attached for sealing.
This plug body 32 seals the heat-insulating container by locking the upper lid 30 and the shoulder member 28 with a stopper 34 .

In the case of a heat-insulating container equipped with a vacuum double bottle 20 having such a structure, the inner cylinder 21 and the outer cylinder 22 of the vacuum double bottle 20 are joined via a joining member 23 having a substantially U-shaped cross section, This joining member 23 is attached to the vacuum double bottle 20.
Since the opening 6 of the vacuum heat insulating layer 7 is provided so that the contents can be stored up to the opening 6 at the upper end of the vacuum double bottle 20, this heat insulating container is It has excellent volumetric efficiency.

In addition, in the vacuum double bottle 20 of this thermal insulation container, the joint between the inner and outer cylinders 21 and 22 is formed by the joint member 23 having a substantially U-shaped cross section, so that conduction from the inner cylinder 21 to the outer cylinder 22 is The distance over which heat is transmitted, that is, the distance between the inner and outer cylinders 21 and 22 is long, and the loss of heat due to heat transfer from the inner cylinder 21 to the outer cylinder 22 is small. Moreover, in the vacuum double bottle of this example, since the recess of the joining member 23 having a substantially U-shaped cross section is filled with the heat insulating member 24, the joining member 23 is completely shielded from the outside air. This prevents heat radiation from escaping, and this also helps reduce heat loss. Therefore, this heat-retaining container has little heat loss and has excellent heat-retaining performance.

Furthermore, the joining member 23 is filled with a heat insulating member 24,
By using these as structural members,
The inner and outer cylinders 21 and 22 can be firmly fixed. In this way, even when external force or vibration is applied to the vacuum double bottle 20 in the radial direction, the heat insulating member 24 prevents the upper ends of the peripheral walls of the inner and outer cylinders 21 and 22 from deforming in the radial direction. Therefore, the inner and outer cylinders 2
1 and 22 can be prevented from coming into contact with each other other than the joint portion, and loss of heat retention due to heat transfer from the contact portion can be prevented.

“Example 2” Figure 2 shows the second example of this invention.
Components that are the same as those of the first embodiment shown in FIG. 1 are given the same reference numerals to simplify the explanation thereof.

The vacuum double bottle 40 of the thermal insulation container of this example has a tubular inner cylinder 41 and an outer cylinder 42 with openings 6 at both upper and lower ends.
The inner and outer cylinders 41 and 42 are joined together through joining members 23 and 23 having a substantially U-shaped cross section, as in the first embodiment. The concave portion of the joining member 23 is filled with a heat insulating member 24, and a packing 25 is fitted into the opening.

The exterior case 43 that accommodates such a double vacuum bottle 40 has two openings 6 and 6 of the double vacuum bottle 40.
6, a body 45 that covers the circumferential surface of the vacuum double bottle 40, and a shoulder member 28. The bottom cover 44 of this exterior case 26
is a bottom member 4 that closes the opening 6 of the vacuum double bottle 40.
6, and a heat insulating body 47 that prevents heat radiation from the bottom member 46.
and a lid body 48 which sandwiches the heat insulating body 47 on the lower surface of the bottom member 46. Further, a top lid 30 is connected to the shoulder member 28 via a hinge member 29.
is installed. This upper lid 30 is provided with a stopper 32 filled with a heat insulator 31.
An O-ring 33 is attached to the circumference of the stopper 32 of the upper lid 30.
is installed. This O-ring 33
0 is locked by the stopper 34, the shoulder member 28
The opening 6 of the vacuum double bottle 20 is hermetically sealed.

In the case of the heat insulating container of this example, in addition to obtaining the same effects as those of the first example, the vacuum double bottle 4
Since the inner and outer cylinders 41 and 42 forming a zero are tubular, there is an advantage that the inner and outer cylinders 41 and 42 are easy to manufacture.

"Example" The heat-retaining container of the first example shown in FIG. 1 was prototyped and its heat-retaining performance was investigated. The prototype thermal container has a capacity of 1
The length of the joining member 23 along the insulation is 30 mm.
mm. Further, the diameter of the opening 6 of the vacuum double bottle 20 was 85 mm. As a comparative example, a conventional heat-insulating container shown in FIG. 4 was prepared. The outer cylinder 5 of the conventional thermal insulation container of the comparative example was similar to the outer cylinder 22 of the prototype thermal insulation container of the present invention. The comparative example has a mouth portion 12 from the seal portion 10 to the opening portion 6.
The length along the insulation is 30 mm, the diameter of the content storage part 11 is 85 mm, and the capacity is 0.8 mm.
It was from.

95% each for the thermal insulation container of the present invention and the thermal insulation container of the comparative example.
After pouring a full amount of hot water at ℃, it was left at room temperature for 24 hours. After this, the water temperature of each was measured, and it was 55°C for the water of the present invention and 43°C for the comparative example. From this result, it was confirmed that the product of the present invention has satisfactory heat retention performance.

"Effect of the invention" As explained above, the vacuum double bottle of this invention has a recess that is bent in the vacuum insulation layer and opens outward from the opening between the inner cylinder and the outer cylinder. By joining the inner and outer cylinders through a joining member and filling the recess with a heat insulating member, the heat transfer distance between the inner and outer cylinders is increased, and the heat radiation from the joint is reduced, so the capacity of the inner cylinder is increased. This makes it possible to maintain the heat retention performance of the vacuum double bottle.
Therefore, this vacuum double bottle has excellent volumetric efficiency.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the first embodiment of a heat-insulating container equipped with a vacuum double bottle of this invention, Fig. 2 is a cross-sectional view showing the second embodiment, and Figs. 3 and 4 are respectively conventional FIG. 2 is a cross-sectional view showing an example of a heat-retaining container equipped with a vacuum double bottle. 6... Opening, 7... Vacuum insulation layer, 20... Vacuum double bottle, 21... Inner cylinder, 22... Outer cylinder, 23...
...Joining member, 24...Insulating member, 40...Double vacuum bottle, 41...Inner cylinder, 42...Outer cylinder.

Claims (1)

[Scope of Claim for Utility Model Registration] In a vacuum double bottle in which an inner cylinder and an outer cylinder are joined and integrated at an opening, and the space between the inner and outer cylinders is a vacuum insulation layer, the opening of the inner cylinder and the outer cylinder is , a vacuum double bottle characterized in that the vacuum heat insulating layer is joined via a joining member having a concave portion that is bent and opens outward from the opening, and the concave portion of the joining member is filled with a heat insulating member. .