JPH0661774U - Vacuum insulation container structure - Google Patents

Abstract

(57) [Abstract] [Purpose] A vacuum insulation space is provided between an inner container and an outer container, and when manufacturing a vacuum insulation container filled with a filler in this insulation space, deformation due to welding or heating / exhausting is avoided. To prevent. [Structure] The outer container 16 is composed of a main body 18 and a rear plate 19, a recess 21 is provided in the rear plate 19, and a heat insulating space is provided in the recess 21.
An exhaust port 24 for evacuating the inside of 17 is provided. [Effect] The concave portion 21 absorbs the deformation of the container when the main body portion 18 and the rear plate 19 are welded or when the container is evacuated through the exhaust port 24.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a vacuum heat insulating container, and more particularly to the structure of a vacuum heat insulating container in which a vacuum heat insulating space is filled with fiber board or powder.

[0002]

[Prior art]

 Conventionally, this type of vacuum heat insulation container is made of a metal material as shown in the perspective view of FIG. 5 (a) and the AA cross-sectional view of FIG. 5 (a) shown in FIG. 5 (a). A container main body 3 having an inner-outer double structure composed of a container 2 is configured, and a heat insulating cover (not shown) is provided at an opening 4 of the container main body 3. In the container body 3, a heat insulating space 5 is provided between the outer container 1 and the inner container 2, and the heat insulating space 5 is filled with a filler 6 such as fibrous or powdery particles. Is evacuated and manufactured.

In order to configure the container body 3 as described above, the outer container 1 has an opening 7 at the rear portion as shown in the drawing, and the opening 7 evacuates the inside of the heat insulating space 5. It is closed by welding a rear plate 9 provided with an exhaust port 8. Further, when filling a fiber board as the filling material 6 in the heat insulation space 5, a cutout portion 10 is provided in a portion of the fiberboard corresponding to the welded portion of the rear plate 9, and the cutout portion 10 is provided with the adsorbent 11. Filling.

Then, as shown in FIG. 6, the container main body 3 is installed in the heating furnace 12, and a vacuum pump is connected to the exhaust port 8 through a pipe 13 for heating and exhausting.

[0005]

[Problems to be solved by the device]

 However, in the vacuum heat insulating container as described above, the rear plate 9 usually has a welding line around it due to the plate cutting of the plate material, and therefore, there is a problem that strain is easily generated by the welding heat.

Further, when the vacuum heat insulating container is manufactured, since the pipe 13 is connected to the exhaust port 8 and guided to the outside of the furnace 12, the periphery of the exhaust port 8 is cooled to cause temperature unevenness, and the plate material of the rear plate 9 is seated. There is a problem that bending and swelling may occur.

The present invention solves the above problems, and an object of the present invention is to provide a vacuum heat insulating container in which strain due to welding, buckling due to heating and exhaust, and undulation do not easily occur during manufacturing.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the structure of the vacuum heat insulating container of the present invention is such that a vacuum heat insulating space is provided between an inner container and an outer container, and a filling material is filled in the heat insulating space, and the outer container is a main body. A structure of a vacuum heat insulating container constituted by a rear plate and a rear plate is characterized in that a recess is provided in the rear plate and an exhaust port for vacuum exhausting the heat insulating space is provided in the recess.

Further, the structure of the vacuum heat insulating container of the present invention is characterized in that a barring portion for welding the exhaust port is provided around the exhaust port. Further, the structure of the vacuum heat insulating container of the present invention is characterized in that an adsorbent is filled around the recess in the heat insulating space.

[0010]

[Action]

 With the above configuration, by providing the recess in the rear plate, the deformation when the rear plate is welded to the outer container or when the heat insulating space is heated and exhausted is absorbed by the recess, and strain and buckling are less likely to occur.

Further, since the burring portion for welding the exhaust port is provided in the recess, the strain generated by the welding of the exhaust port is reduced. Moreover, since the adsorbent is filled around the concave portion, the adsorbent can be easily filled.

[0012]

【Example】

 Hereinafter, the structure of the vacuum insulation container of the present invention will be described with reference to the drawings. 1A and 1B show a vacuum heat insulating container according to an embodiment of the present invention, wherein FIG. 1A is a perspective view and FIG. 1B is a sectional view taken along line BB in FIG. 1A. The rectangular vacuum heat insulating container 14 is composed of a container 15 and an outer container 16, and a vacuum heat insulating space 17 is provided between them. The outer container 16 is composed of a main body 18 and a rear plate 19, and is integrally formed by welding a rear plate 19 corresponding to the opening 20 to an opening 20 provided at the rear of the main body 18. Is formed in.

The rear plate 19 has a substantially rectangular recess 21 in the center, and the periphery of the recess 21 is a flat portion 22, and the edge of the flat portion 22 is welded to the main body portion 18. In addition, a burring process for exhaust port welding is applied to the center of the recess 21, and the burring portion 23 is welded with the exhaust port 24 inserted.

The vacuum heat insulating space 17 is filled with a fiber-based or powder-based filler 25 such as a fiber board up to the position of the bottom surface of the recess 21 of the rear plate 19, and the space 26 around the recess 21 is filled. The adsorbent 27 is filled.

In the vacuum heat-insulating container 14 having the above-described configuration, the recess 21 is provided in the rear plate 19, so that the plate material is less likely to be deformed out-of-plane, and the rear plate 19 is distorted even when it is welded to the opening 20 of the main body 18. It becomes difficult. Further, since the burring portion 23 is provided around the exhaust port 24 in the rear plate 19, the strain of the rear plate 19 when the exhaust port 24 is welded to the rear plate 19 is reduced. Further, thermal deformation caused by temperature unevenness around the exhaust port 24 that occurs when the vacuum heat insulating container 14 is heated and evacuated is also absorbed by the concave portion 21, so that buckling is less likely to occur. Further, since the space 26 around the recess 21 is filled with the adsorbent 27, the surface of the filling material 25 may have a flat shape corresponding to the position of the rear plate 19, and the fiber board forming the filling material 25 may be cut out or powdered. There is no need to adjust the filling height at the end to provide space for the adsorbent.

2 and 3 show a modified embodiment of the vacuum heat insulating container 14 shown in FIG. In these embodiments, the vacuum heat insulating container has almost the same structure and operation as the container 14 of the embodiment shown in FIG. 1, and therefore the description of the same parts will be omitted.

FIG. 2 shows a cylindrical vacuum heat insulating container 28, (a) is a perspective view and (b) is a sectional view. The rear plate 29 has a circular recess 30 in the center and is welded to the main body 32 at the edge of the flat portion 31.

FIG. 3 is a perspective view showing a rectangular vacuum heat insulating container 33. The rear plate 34 has a circular recess 35 in the center and is welded to the main body 37 at the edge of the flat portion 36. Similar to the vacuum heat insulating container shown in FIG. 1, the vacuum heat insulating container shown in FIG. 2 or 3 is unlikely to be deformed and the adsorbent can be easily filled.

FIG. 4 is a sectional view of a vacuum heat insulating container 38 having a rear plate structure different from that of the embodiment shown in FIG. The rear plate 39 has a recess 40 at the center, and the periphery of the recess 40 is a flat portion 41. Here, the structure of the container of this embodiment differs from the structure of the container of the embodiment shown in FIG. 1 in that a lip portion 42 perpendicular to the flat portion 41 is formed around the flat portion 41. Is. The lip portion 42 is in sliding contact with the inner wall 43a of the main body portion 43 in the outward direction of the container 38, and the rear plate 39 is welded to the main body portion 43 at the end of the lip portion 42.

In the above vacuum heat insulating container 38, the rear plate 39 is provided with the lip portion 42 and is welded. Therefore, in addition to the effect described in the embodiment of FIG. The strain of can be further reduced.

Next, the results of a comparative test between the vacuum heat insulating container according to the present invention and the conventional vacuum heat insulating container will be shown. In this test, using the vacuum insulation container 14 based on the present invention described previously with reference to FIG. 1 and the conventional vacuum insulation container 3 similarly described with reference to FIG. I checked. Here, the flatness means that there is an actual surface between parallel planes separated by x mm. In the rear plate having the structure of the present invention, the flatness of the recess is measured, and in the rear plate of the conventional example, Measured the flatness of the entire rear plate. These vacuum insulation containers 14 and 3 are made of stainless steel SUS304 with a thickness of 1.0 mm to form a rectangular container with an outer size of 800 × 600 × 500 mm and a wall thickness of 25 mm. It is constructed by filling fiberboard.

The vacuum heat insulating container 14 has a substantially rectangular recess 21 of 500 × 400 mm and a step of 2 mm at the center of the rear plate 19 of 600 × 500 mm, and is formed in the main body 18 at the edge of the rear plate 19. It is welded.

On the other hand, the rear plate 9 of the vacuum heat insulating container 3 is formed flat as described above, and is welded at its edge to form the outer container 1. The vacuum insulation containers 14 and 3 were heated and evacuated, and the flatness of each was measured. As a result, the flatness of the vacuum insulation container 14 was 1 mm, and the flatness of the vacuum insulation container 3 was 3 mm. From these measured values, it can be seen that the vacuum heat insulating container 14 according to the present invention has a smaller deformation than the vacuum heat insulating container 3 of the conventional example.

[0024]

[Effect of device]

 With the above configuration, since the thermal deformation can be absorbed by the recess provided in the rear plate, it is possible to prevent strain and buckling during welding of the rear plate and during heating and exhausting in the heat insulating space.

Further, by forming the burring portion around the exhaust port, the strain at the time of welding the exhaust port can be reduced. In addition, by filling the space formed around the recess with an adsorbent, it is not necessary to cut out the fiber board when using the fiber board as a filler, and when using powder, the powder filling There is no need to adjust the height. As a result, the number of manufacturing steps can be reduced.

[Brief description of drawings]

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

FIG. 2 is a view showing a vacuum heat insulating container according to another embodiment of the present invention.

FIG. 3 is a view showing a vacuum heat insulating container according to still another embodiment of the present invention.

FIG. 4 is a view showing a vacuum heat insulating container according to still another embodiment of the present invention.

FIG. 5 is a view showing a conventional vacuum heat insulating container.

FIG. 6 is a diagram illustrating heating and exhausting of a vacuum heat insulating container.

[Explanation of symbols]

 14 Vacuum insulation container 15 Inner container 16 Outer container 17 Vacuum insulation space 18 Main body 19 Rear plate 21 Recessed portion 23 Burring portion 24 Exhaust port 25 Filling material 27 Adsorbent

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Harada 2-26 Ohama-cho, Amagasaki City, Hyogo Stock Company Kubota Mukogawa Works (72) Inventor Mikio Sato 2-26 Ohama-cho, Amagasaki City Hyogo Stock Association Kubota Mukogawa Factory

Claims (3)

[Scope of utility model registration request] 1. A vacuum heat insulating container having a vacuum heat insulating space provided between an inner container and an outer container, the filler being filled in the heat insulating space, wherein the outer container has a structure of a vacuum heat insulating container including a main body and a rear plate. A structure of a vacuum heat insulating container, characterized in that a recess is provided in the rear plate, and an exhaust port for vacuum exhausting the heat insulating space is provided in the recess. 2. The structure of the vacuum insulated container according to claim 1, wherein a burring portion for welding the exhaust port is provided around the exhaust port. 3. The structure of the vacuum heat insulating container according to claim 1, wherein an adsorbent is filled around the recess in the heat insulating space.