阅读说明：本技术 真空绝热体及冰箱 (Vacuum insulator and refrigerator ) 是由 丁元荣 尹德铉 李成燮 金大雄 金素拉 于 2016-08-02 设计创作，主要内容包括：一种真空绝热体包括：第一板构件；第二板构件；密封部；支撑单元；抗热单元；以及排气端口,其中,向第三空间延伸以联接到支撑单元的延伸部被设置到第一板构件和第二板构件中的至少一者,而且延伸部被形成为从第一板构件和第二板构件中的至少一者的边缘部向下延伸。(A vacuum heat insulator comprising: a first plate member; a second plate member; a sealing part; a support unit; a heat-resistant unit; and an exhaust port, wherein an extension portion extending to the third space to be coupled to the support unit is provided to at least one of the first plate member and the second plate member, and the extension portion is formed to extend downward from an edge portion of at least one of the first plate member and the second plate member.)

1. A vacuum thermal insulator, comprising:

a first plate;

a second plate;

a sealing part sealing the first plate and the second plate to provide a third space, the third space being in a vacuum state;

a support portion supporting the first plate and the second plate and disposed in the third space;

an exhaust port through which gas in the third space is exhausted; and

an extension portion extending from at least one of the first plate and the second plate to be coupled to the support portion,

wherein the support portion includes a support plate coupled to the extension portion.

2. The vacuum thermal insulator of claim 1, wherein said support plate extends in a direction parallel to at least one of said first plate and said second plate.

3. The vacuum thermal insulator of claim 2, wherein the support plate comprises:

a first support plate contacting the first plate in a direction parallel to the first plate; and

a second support plate contacting the second plate in a direction parallel to the second plate.

4. The vacuum thermal insulator of claim 1, wherein the extension portion extends downwardly from an edge portion of at least one of the first plate and the second plate.

5. The vacuum thermal insulator of claim 1, wherein the support plate comprises a fixing bracket contacting at least one surface of the extension portion to support at least one of the first plate and the second plate.

6. The vacuum thermal insulator of claim 1, wherein the extension covers an edge of the support plate.

7. The vacuum thermal insulator of claim 1, wherein each of said support plate and said first and second plates is curved and formed such that each of said first and second plates and said support plate has the same center of curvature.

8. The vacuum thermal insulator of claim 1, wherein the support plate comprises:

a first support plate corresponding to the first plate;

a second support plate corresponding to the second plate;

a plurality of rods attached to one of the first and second support plates; and

a plurality of insertion holes into which respective rods are inserted, the plurality of insertion holes being formed in the other one of the first support plate and the second support plate.

9. The vacuum thermal insulator as set forth in claim 8, wherein a plurality of connection bases to which said respective rods are connected are formed at said support plate to which said plurality of rods are attached, and

the interval between the plurality of insertion holes is smaller or larger than the interval between the plurality of connection bases.

10. The vacuum thermal insulator according to claim 9, wherein each of said plurality of connection bases to which said plurality of rods and said support plate are connected is formed in a circular shape.

Technical Field

The present disclosure relates to a vacuum heat insulator and a refrigerator.

Background

Vacuum thermal insulation is a product used to inhibit heat transfer by drawing a vacuum in its body. The vacuum insulator can reduce heat transfer by convection and conduction, and thus is applied to heating devices and cooling devices. In a conventional heat insulating method applied to a refrigerator, a foamed polyurethane heat insulating wall having a thickness of about 30cm or more is generally provided (although it is variously applied to refrigeration and freezing). However, the inner volume of the refrigerator is thus reduced.

In order to increase the internal volume of the refrigerator, application of a vacuum insulator to the refrigerator is attempted.

First, korean patent No. 10-0343719 (reference 1) of the present applicant has been disclosed. According to reference 1, a method is disclosed in which a vacuum insulation panel is prepared and then installed in a wall of a refrigerator, and the outside of the vacuum insulation panel is finished with a separate molding member such as styrofoam (polystyrene). According to the method, additional foaming is not required, and the heat insulation performance of the refrigerator is improved. However, the manufacturing cost increases and the manufacturing method is complicated. As another example, korean patent laid-open publication No. 10-2015-0012712 (reference 2) discloses a technique (method) of providing walls using a vacuum insulation material and additionally providing insulation walls using a foam filling material. According to reference 2, the manufacturing cost increases, and the manufacturing method is complicated.

As another example, attempts have been made to manufacture all the walls of a refrigerator using a single product vacuum insulation. For example, U.S. patent publication No. US2040226956a1 (reference 3) discloses a technique for providing a heat insulating structure of a refrigerator in a vacuum state. However, it is difficult to obtain a practical level of heat insulation effect by providing the wall of the refrigerator in a sufficiently vacuum state. In particular, it is difficult to prevent heat transfer from occurring at the contact portion between the outer case and the inner case having different temperatures. In addition, it is difficult to maintain a stable vacuum state. Further, it is difficult to prevent the deformation of the housing due to the sound pressure in the vacuum state. Due to these problems, the technique of reference 3 is limited to a low-temperature refrigeration apparatus, and is not suitable for a refrigeration apparatus for general household use.

Disclosure of Invention

Technical problem

Drawings

Fig. 1 is a perspective view of a refrigerator according to an embodiment.

Fig. 2 is a view schematically showing a main body of a refrigerator and a vacuum heat insulator according to an embodiment.

Fig. 3 is a view showing a plurality of embodiments of an internal structure of a vacuum space part.

Fig. 4 is a view showing embodiments of the conductive resistance sheet and a peripheral portion thereof.

Fig. 5 is a view showing in detail a vacuum heat insulator according to a second embodiment.

Fig. 6 is a view illustrating a state in which a radiation resistant sheet is fastened to the support unit of fig. 5.

Fig. 7 is a sectional view taken along line I-I' of fig. 6.

Fig. 8 is a sectional view taken along line II-II' of fig. 6.

Fig. 9 is a plan view of one vertex portion (vertex portion) of the radiation shield of fig. 5.

Fig. 10 shows a graph representing the change in the heat insulating property with respect to the vacuum pressure and the change in the gas conductivity by using a simulation.

Fig. 11 is a graph showing the time and pressure variation of the process of exhausting the inside of the vacuum thermal insulator when the supporting unit is used, which is obtained by observation.

Fig. 12 shows a graph obtained by comparing the vacuum pressure and the gas conductivity.

Fig. 13 is a view illustrating association (correlation) between a support unit of a vacuum heat insulator and a first plate member according to a third embodiment, which illustrates any one of edge portions.

Fig. 14 is an enlarged view of fig. 13.

Fig. 15 is a longitudinal sectional view of fig. 13.

Fig. 16 is a view illustrating the support unit and the radiation shield of fig. 13.

Fig. 17 is a plan view of fig. 16.

Fig. 18 is a view showing a vacuum heat insulator according to a fourth embodiment.

Fig. 19 is a view showing the first plate member of fig. 18.

Fig. 20 is a view showing a vacuum heat insulator according to a fifth embodiment.

Fig. 21 is a view showing a vacuum heat insulator according to a sixth embodiment.

Fig. 22 is a longitudinal sectional view of fig. 21.

Fig. 23 is a view showing a vacuum heat insulator according to a seventh embodiment.

Fig. 24 is a view illustrating the supporting unit of fig. 23.

Fig. 25 is an exploded view of the support unit of fig. 23.

Fig. 26 is a view illustrating a case where a plurality of radiation resistant sheets are provided in the supporting unit of fig. 23.

Fig. 27 is a view showing the supporting unit of fig. 23, as viewed from above.

Fig. 28 is a view illustrating one side of the supporting unit of fig. 23.

Fig. 29 is a view illustrating an edge portion of the support plate of fig. 23.

Embodiments provide a vacuum heat insulator and a refrigerator capable of obtaining a sufficient heat insulating effect in a vacuum state and being commercially used.