WO2024257913A1 - Vacuum adiabatic body - Google Patents

Abstract

The vacuum adiabatic body according to the present invention comprises: a first plate having a first temperature; a second plate having a second temperature different from the first temperature; and a sealing part sealing the first plate and the second plate to provide a vacuum space.

Description

Vacuum insulator

The present invention relates to a vacuum insulator.

The insulation performance can be improved by forming an insulation wall using a vacuum. A device that forms at least a portion of the internal space using a vacuum and achieves an insulation effect can be called a vacuum insulator.

The applicant has developed a technology to obtain a vacuum insulator that can be used in various devices and home appliances, and has disclosed a vacuum insulator and a refrigerator in Korean Patent Publication No. 1020200001396A. The vacuum insulator of the above-mentioned cited document discloses that a heat exchanger is installed inside a vacuum space.

The above-mentioned cited document presents the self-configuration and support structure of a heat exchanger placed in a vacuum space. The above-mentioned cited document does not disclose the specific installation structure of the heat exchanger and its relationship with other members. For example, the relationship between the heat exchanger and other members inside the vacuum space and the method of mounting the heat exchanger are not disclosed.

The present invention proposes an installation structure for a heat exchanger without loss of insulation effect.

In addition to the examples presented above, the present invention proposes specific solutions to problems and solutions for solving them in [Means for Solving Problems] and [Specific Contents for Carrying Out the Invention].

The vacuum insulator of the present invention may include a first plate having a first temperature; a second plate having a second temperature different from the first temperature; and a vacuum space provided between the first and second plates. The vacuum space may include a sealing portion that seals the first plate and the second plate so as to provide the vacuum space. A support may be included to maintain the vacuum space.

Optionally, the support may include a support plate, and a bar extending in the thickness direction of the vacuum space portion on the support plate. The vacuum space portion may include at least two spaces that are bent to each other. The supports inserted into the at least two spaces may contact each other. The outermost part of the supports that contact each other may not have the bar. The outermost part of the support may be provided with an independent branch whose end is not supported, or a connecting branch connecting at least two adjacent independent branches. At least one of the independent branches and the connecting branches may not have the bar.

The independent branch and the connecting branch can be supported by being mixed with each other. At least one of the connecting branch and the independent branch can be the same as at least one of the thickness and the width of the supporting plate. The independent branch can have a first end fixed to the supporting plate and a second end not supported by the supporting plate. A tolerance of at least one of the connecting branch and the independent branch can be within 0.1 mm. The supporting plate can include an inner supporting plate and an outer supporting plate. The inner supporting plate and the outer supporting plate can be in contact with each other. The inner supporting plate and the outer supporting plate can have different specifications. The length of the independent branch of the inner supporting plate can be a value obtained by subtracting the thickness of the vacuum space from the length of the independent branch of the outer supporting plate. The length of the connecting branch of the inner supporting plate can be a value obtained by subtracting the thickness of the vacuum space from the length of the connecting branch of the outer supporting plate. The supports in contact with each other may include a first support and a second support. The first support and the second support may have free ends that are movable and can contact each other.

Optionally, the vacuum space portion includes at least two spaces that are bent to each other, and at least two supports inserted into the at least two spaces can contact each other. The contact of the two supports can include at least one of line contact and point contact. The two supports can be free to move relative to each other except that the first support pushes the second support due to the contact. The contact portion of the two supports can have a smaller tolerance than a portion that does not contact. The support plate can include an inner support plate and an outer support plate. The inner support plate and the outer support plate can each contact each other. The support can include a support plate, and a bar extending from the support plate in the thickness direction of the vacuum space portion. The outermost portion of the at least two supports can be free of the bar. An independent branch whose end is not supported can be provided at the outermost portion of the support.

Optionally, the outermost edges of the at least two supports may be provided with independent branches whose ends are not supported, or connecting branches connecting the at least two adjacent independent branches. The support may include two support plates, and a support member that maintains a gap between the two support plates. At least one of the connecting branches and the independent branches may not be provided with the support member.

Optionally, the support may include at least one support plate corresponding to at least one of the first and second plates. The vacuum space may include at least two spaces that are bent to each other. At least two of the supports inserted into the at least two spaces may be fixed to each other. A fastening portion may be provided at an end of the support plate. The support plate may include an inner support plate and an outer support plate corresponding to the first and second plates. The size of the outermost grid of the inner support plate may be smaller than the size of the inner grid of the inner support plate. At least two of the supports may be constrained to move in at least one of XYZ directions. At least two of the supports may be constrained to move in at least one of XYZ directions. The support plate may include an inner support plate and an outer support plate corresponding to the first and second plates. One fastening portion may be provided at an end of the outer and inner support plates. At an end of the inner support plate, two fastening portions may be provided at a predetermined interval. The interval between the two fastening portions may correspond to the thickness of the vacuum space. At least one of the at least two supports may not have an end of the support plate fixed. At least two fastening portions may be provided at the outer support plate. At least one of the at least two supports may be provided with one fastening portion spaced apart from an end of the inner support plate by a predetermined distance. At least one of the at least two supports may have an end of the inner support plate shorter than the outer support plate by a predetermined distance. At least one of the support and the unit of the support may be provided with at least two having the same shape.

Optionally, the gap between the inner support plate and the outer support plate may have a portion that narrows toward the edge. An end of the outer support plate may be provided as a free end with respect to another intersecting outer support plate. An end of the inner support plate may be provided as a fixed end by another intersecting inner support plate. An end of the inner support plate may be provided as a free end with respect to another intersecting inner support plate.

Optionally, at least two of the above supports may be provided, and the at least two of the above supports may be fastened to each other. At least a portion of the above supports may be provided by fastening units of the same shape. The above outer support plate may be provided by fastening units of the same shape. The above inner support plate may use units of different shapes. The above inner support plate may be used by cutting units of the same shape for fastening before fastening.

Optionally, at least two of the supports inserted into the at least two spaces can be restrained to each other in the X, Y, Z three directions. The support plates may include an inner support plate and an outer support plate corresponding to the first and second plates. The outer support plate of one of the at least two supports and the outer support plate of the other of the at least two supports may be fastened to each other. The inner support plate of one of the at least two supports and the inner support plate of the other of the at least two supports may be fastened to each other. An extension bar for fastening an end of the inner support plate and an end of the outer support plate may be provided to at least one of the at least two supports. An extension bar for fastening an end of the inner support plate and an outer support plate may be provided to at least one of the at least two supports. Two extension bars having a predetermined interval may be provided to an end of the outer support plate of at least one of the at least two supports. The above gap may correspond to the thickness of the vacuum space or the length of the bar provided on the support plate. Two extension bars may be provided at the end of at least one inner support plate of the at least two supports. One of the two extension bars may be provided on a side or inner surface of the end. At least one inner support plate of the at least two supports may not be provided with an outermost grid. At least another inner support plate of the at least two supports may be provided with an outermost grid. An extension bar provided at the end of the support plate may be included, and a radiation resistance sheet extending to the extension bar and reducing radiation heat transfer may be included. The supports may include a first support and a second support whose extension directions intersect.

Optionally, the first support and the second support may be fixed to each other where they meet. A fastening member provided on a side surface of the first support; and an extension bar provided on an inner surface of the second support and fitted into the fastening member may be included. The fastening member and the extension bar may be provided in pairs, each spaced apart by a predetermined interval. The fastening member and the extension bar may be provided at each end of the support.

Optionally, a first extension bar provided at an end of the first support; and a fastening portion provided on the second support to which the first extension bar is fitted may be included. The copy resistance sheet may extend to the first extension bar. A second extension bar spaced apart from the first extension bar by a predetermined distance; and a fastening portion provided on the second support to which the second extension bar is fitted may be included. A second extension bar spaced apart from the first extension bar by a predetermined distance; and a fastening portion provided on the first support to which the second extension bar is fitted may be included.

According to the present invention, a vacuum insulation body with high insulation efficiency can be proposed.

According to the present invention, a vacuum insulation body can be conveniently manufactured.

The effects of the present invention are disclosed in more detail in [Specific details for carrying out the invention].

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

Figure 2 is a drawing schematically showing a vacuum insulation material used in the body and door of a refrigerator.

Figure 3 is a drawing showing an example of a support that maintains a vacuum space.

Figure 4 is a drawing explaining an example of a vacuum insulation body centered on a heat transfer resistor.

Figure 5 is a graph that observes the process of exhausting the interior of a vacuum insulator with respect to time and pressure when a support is used.

Figure 6 is a graph comparing vacuum pressure and gas conductivity.

Figure 7 is a drawing explaining a method for manufacturing a vacuum insulation material.

Figure 8 is a drawing illustrating an example of how a support and a heat exchanger are installed.

Fig. 9 is an example of support.

Figure 10 is a drawing explaining how supports having connecting branches come into contact with each other.

Figure 11 is a drawing explaining how supports having independent branches come into contact with each other.

Figures 12 and 13 illustrate embodiments in which two supports are fixed in at least one direction.

Fig. 14 is another embodiment in which two supports are fixed in at least one direction.

Fig. 15 is an embodiment in which two supports are fixed in at least this direction.

Figure 16 is a drawing detailing the support of Figure 12.

Figure 17 is a drawing detailing the support of Figure 14.

Fig. 18 is a drawing detailing the support of Fig. 15.

Fig. 19 is an example in which two supports are strongly constrained.

Fig. 20 is a drawing showing the fastening process of the support of Fig. 19.

Fig. 21 is an example where the two supports are most strongly constrained.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented below, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments included within the scope of the same spirit by adding, changing, deleting, and adding components or limitations on components, but this will also be considered to be included within the scope of the spirit of the present invention.

The present invention may have many embodiments in which its ideas are implemented, and each embodiment may have a part replaced by a corresponding part or a related part of another embodiment. The present invention may be one of the examples presented below, or an example in which two or more are combined.

The present invention may be a vacuum insulator including a first plate; a second plate; and a vacuum space provided between the first and second plates. The vacuum insulator may include a sealing member for providing the vacuum space (vacuum space). The vacuum space may be a vacuum space provided in an internal space between the first plate and the second plate. The sealing member may seal the first plate and the second plate to provide the internal space provided in a vacuum state. The vacuum insulator may optionally include a side plate connecting the first plate and the second plate. In the present invention, the expression plate may mean at least one of the first and second plates and the side plate. At least some of the first and second plates and the side plate may be formed integrally or at least some of them may be sealed to each other. Optionally, the vacuum insulator may include a support for maintaining the vacuum space. The vacuum insulation material may optionally include a heat transfer resistor for reducing the amount of heat transfer between a first space provided in the vicinity of the first plate and a second space provided in the vicinity of the second plate, or for reducing the amount of heat transfer between the first plate and the second plate.

Optionally, the vacuum insulator may include a component fastening portion formed on at least a portion of the plate. Optionally, the vacuum insulator may include an additional insulator. The additional insulator may be provided to be connected to the vacuum insulator. The additional insulator may be an insulator having the same or different vacuum degree as the vacuum insulator. The additional insulator may be an insulator having a vacuum degree lower than or equal to the vacuum insulator or not including a vacuum portion therein. In this case, it may be advantageous to connect another object to the additional insulator.

In the present invention, the direction along the wall defining the vacuum space may include the longitudinal direction of the vacuum space and the height direction of the vacuum space. The height direction of the vacuum space may be defined as any one of the directions of the virtual lines connecting the first space and the second space, which will be described later, while penetrating the vacuum space. The longitudinal direction of the vacuum space may be defined as a direction perpendicular to the height direction of the set vacuum space.

In the present invention, the connection of object A to object B can be defined as that at least a part of object A and at least a part of object B are directly connected, or that at least a part of object A and at least a part of object B are connected via a medium interposed between objects A and B. The medium can be provided to at least one of objects A and B. The connection can include that the object A is connected to the medium, and the medium is connected to the object B.

A part of the above medium may include a part that is connected to one of objects A and B. Another part of the above medium may include a part that is connected to the other of objects A and B. In a variation, the connection of object A to object B may include that objects A and B are prepared as one body in a shape in which they are connected in the above-described manner. In the present invention, examples of the connection may be supporting, bonding, and sealing, which will be described later.

In the present invention, it can be defined that object A is supported by object B, meaning that object A is restricted from moving in one or more of the +X, -X, +Y, -Y, +Z, and -Z-axis directions by object B. In the present invention, the embodiment of the support may be the bonding and sealing described later. In the present invention, it can be defined that object A is bound to object B, meaning that object A is restricted from moving in one or more of the X, Y, and Z-axis directions by object B.

In the present invention, an embodiment of the above combination may be a sealing which will be described later. In the present invention, when an object A is sealed to an object B, it can be defined that a state in which movement of a fluid is not permitted at a portion where the objects A and B are connected. In the present invention, at least one object, that is, at least a portion of the object A and the object B, may be defined as including a portion of the object A, the entire object A, a portion of the object B, the entire object B, a portion of the object A and a portion of the object B, a portion of the object A and the entire object B, the entire object A and a portion of the object B, and the entire object A and the entire object B. In the present invention, when a plate A may be a wall defining a space A, it can be defined that at least a portion of the plate A may be a wall forming at least a portion of the space A.

That is, at least a part of plate A may be a wall forming space A, or plate A may be a wall forming at least a part of space A. In the present invention, the central part of the object may be defined as a part located in the center of the third part when the object is divided into thirds based on the longitudinal direction of the object. The peripheral part of the object may be defined as a part located to the left or right of the central part of the third part. The peripheral part of the object may include a surface in contact with the central part and a surface opposite thereto.

The opposite side can be defined as the border or edge of the object. Examples of the object may include vacuum insulators, plates, heat transfer resistors, supports, vacuum spaces, and various components introduced in the present invention. In the present invention, the heat transfer resistance indicates the degree to which an object resists heat transfer, and can be defined as a value determined by the shape including the thickness of the object, the material of the object, and the processing method of the object. The heat transfer resistance can be defined as the sum of the conduction resistance, the radiation resistance, and the convection resistance.

The vacuum insulator of the present invention may include a heat transfer path formed between spaces having different temperatures, or may include a heat transfer path formed between plates having different temperatures. For example, the vacuum insulator of the present invention may include a heat transfer path through which cold is transferred from a plate having a low temperature to a plate having a high temperature. In the present invention, a curved portion may be defined as a portion connecting the first portion and the second portion when an object includes a first portion extending in a first direction and a second portion extending in a second direction different from the first direction (including 90 degrees).

In the present invention, the vacuum insulation body may optionally include a component fastening portion. The component fastening portion may be defined as a portion provided on a plate to which components are connected. The components connected to the plate may be defined as a penetrating component arranged to penetrate at least a portion of the plate and a surface component arranged to connect to at least a portion of the surface of the plate.

At least one of a penetrating component and a surface component can be connected to the above-described component connection part. The penetrating component may be a component that mainly forms a path through which a fluid (such as electricity, refrigerant, water, and air) passes. In the present invention, a fluid is defined as all kinds of flowing objects. The fluid includes moving solids, liquids, and gases, and electricity, etc. As an example, the component may be a component that forms a path through which a refrigerant for heat exchange passes, such as an SLHX or a refrigerant pipe.

The above components may be wires that supply electricity to the device. As another example, the components may be components that form a path through which air may pass, such as cold air ducts, hot air ducts, and exhaust ports. As another example, the components may be paths through which fluids, such as cooling water, hot water, ice, and defrost water may pass. The surface components may include at least one of perimeter insulation, side panels, injected foam, pre-formed resin, hinges, latches, baskets, drawers, shelves, lights, sensors, evaporators, front decorations, and hot lines, heaters, exterior covers, and additional insulation.

As an example of the application of the above vacuum insulator, the present invention may include a device having the above vacuum insulator. An example of the device may be an appliance. As an example of the appliance, home appliances including refrigerators, cooking appliances, washing machines, dishwashers, and air conditioners may be exemplified. As an example of the application of the above vacuum insulator to the appliance, the vacuum insulator may form at least a part of the main body and door of the appliance.

As an example of the above door, the vacuum insulator may form at least a part of a general door and a door-in-door that are in direct contact with the main body. Here, the door-in-door may mean a small door placed inside the general door. As another example of the application of the vacuum insulator, the present invention may include a wall having the vacuum insulator. An example of the wall may be a wall of a building including a window.

Hereinafter, the present invention will be specifically described with reference to the drawings. Each drawing accompanying the embodiment may be different from, exaggerated, or simplified from the actual product, and detailed parts may have their features briefly shown. The embodiment should not be interpreted as limited only to the size, structure, and shape presented in the drawings. In the embodiment accompanying each drawing, if the description does not conflict with each other, some configurations of the drawing of one embodiment may be applied to some configurations of the drawing of another embodiment, and some structures of one embodiment may be applied to some structures of the other embodiment.

In the drawing description for the embodiment, the symbols of specific components forming the embodiment may be given the same symbols for different drawings. Components having the same drawing number may perform the same function. For example, the first plate forming the vacuum insulation body is indicated by the drawing number 10 throughout all embodiments and has a portion corresponding to the first space. The first plate may have the same number for all embodiments and may have a portion corresponding to the first space, but the shape of the first plate may vary in each embodiment. Not only the first plate, but also the side plate, the second plate, and additional insulation, etc. may be understood in the same manner.

Fig. 1 is a perspective view of a refrigerator according to an embodiment, and Fig. 2 is a drawing schematically showing a vacuum insulator used in a body and a door of the refrigerator. Referring to Fig. 1, a refrigerator (1) may include a body (2) provided with a cavity (9) capable of storing stored items, and a door (3) provided to open and close the body (2).

The above door (3) is arranged to be rotatable or slidable to open and close the cavity (9). The cavity (9) can provide at least one of a refrigerator and a freezer.

A refrigerant source for supplying cold air to the cavity may be provided. For example, the refrigerant source may be an evaporator (7) that evaporates a refrigerant to remove heat. The evaporator (7) may be connected to a compressor (4) that compresses the evaporated refrigerant in the refrigerant source. The evaporator (7) may be connected to a condenser (5) that condenses the compressed refrigerant in the refrigerant source. The evaporator (7) may be connected to an expander (6) that expands the condensed refrigerant in the refrigerant source.

A fan corresponding to the above evaporator and the condenser may be provided to promote heat exchange. As another example, the cold source may be a heat-absorbing surface of a thermoelectric element. A heat-absorbing sink may be connected to the heat-absorbing surface of the thermoelectric element. A heat-radiating sink may be connected to the heat-radiating surface of the thermoelectric element. A fan corresponding to the heat-absorbing surface and the heat-generating surface may be provided to promote heat exchange.

Referring to FIG. 2, the plates (10, 15, 20) may be walls defining the vacuum space. The plates may be walls dividing the vacuum space and the external space of the vacuum space. Examples of the plates are as follows. The present invention may be any one of the examples below or an example in which two or more are combined.

The above plate may be provided as one piece or may be provided to include at least two pieces connected to each other.

In a first example, the plate may include at least two portions connected to each other in a direction along a wall defining the vacuum space. One of the two portions may include a portion forming the vacuum space (e.g., a first portion). The first portion may be one portion or may include at least two portions that are sealed to each other. The other of the two portions may include a portion extending away from the first portion of the first plate in a direction toward the vacuum space or extending inwardly in the vacuum space (e.g., a second portion).

As a second example, the plate may include at least two layers that are connected to each other in the thickness direction of the plate. One of the two layers may include a layer forming the vacuum space (e.g., the first portion). The other of the two layers may include a portion (e.g., the second portion) provided to an external space of the vacuum space (e.g., the first space, the second space).

In this case, the second part may be defined as an outer cover of the plate. Another one of the two layers may include a part (e.g., the second part) provided in the vacuum space. In this case, the second part may be defined as an inner cover of the plate.

The above plate may include a first plate (10) and a second plate (20). One side of the first plate (which may refer to an inner surface of the first plate) may provide a wall defining the vacuum space, and the other side of the first plate (which may refer to an outer surface of the first plate) may provide a wall defining a first space. The first space may be a space provided near the first plate, a space formed by the device, or an internal space of the device. In this case, the first plate may be referred to as an inner case. When the first plate and an additional member form the internal space, the first plate and the additional member may be referred to as an inner case.

The inner case may include two or more layers. In this case, one of the plurality of layers may be referred to as an inner panel. One surface of the second plate (which may refer to an inner surface of the second plate) may provide a wall defining the vacuum space, and the other surface of the second plate (which may refer to an outer surface of the second plate) may provide a wall defining a second space. The second space may be a space provided near the second plate, another space formed by the device, or an external space of the device. In this case, the second plate may be referred to as an outer case. When the second plate and an additional member form the external space, the second plate and the additional member may be referred to as an outer case. The outer case may include two or more layers. In this case, one of the plurality of layers may be referred to as an outer panel.

The second space may be a space having a higher temperature than the first space or a space having a lower temperature than the first space. Optionally, the plate may include a side plate (15). In Fig. 2, depending on the position where the side plate is arranged, the side plate may also perform the function of a conductive resistance sheet (60) to be described later. The side plate may include a portion extending in the height direction of the space formed between the first plate and the second plate.

The above side plate may include a portion extending in the height direction of the vacuum space.

One side of the side plate may provide a wall defining the vacuum space. The other side of the side plate may provide a wall defining an external space of the vacuum space. The external space of the vacuum space may be at least one of the first space and the second space. The external space of the vacuum space may be a space in which an additional insulating material to be described later is arranged. The side plate may be formed integrally by extending at least one of the first plate and the second plate. The side plate may be a separate component connected to at least one of the first plate and the second plate.

The above plate may optionally include a curved portion. In the present invention, a plate including a curved portion may be referred to as a folded plate. The curved portion may be provided in at least one of the first plate, the second plate, the side plate, between the first plate and the second plate, between the first plate and the side plate, and between the second plate and the side plate. The plate may include at least one of the first curved portion and the second curved portion, examples of which are as follows.

First, the side plate may include the first curved portion. A portion of the first curved portion may include a portion connected to the first plate. Another portion of the first curved portion may include a portion connected to the second curved portion. In this case, the first curved portion and the second curved portion may have large radii of curvature. Another portion of the first curved portion may be connected to an additional straight portion or an additional curved portion provided between the first curved portion and the second curved portion. In this case, the first curved portion and the second curved portion may have small radii of curvature.

Second, the side plate may include the second curved portion. A portion of the second curved portion may include a portion connected to the second plate. Another portion of the second curved portion may include a portion connected to the first curved portion. In this case, the first curved portion and the second curved portion may have a large radius of curvature. Another portion of the second curved portion may be connected to an additional straight portion or an additional curved portion provided between the first curved portion and the second curved portion. In this case, the first curved portion and the second curved portion may have a small radius of curvature. Here, the straight portion may be defined as a portion having a larger radius of curvature than the curved portion. The straight portion may be understood as a completely flat surface or a portion having a larger radius of curvature than the curved portion. Third, the first plate may include the first curved portion. A portion of the first curved portion may include a portion connected to the side plate. The portion connected to the side plate may be provided at a position where the first plate extends in the longitudinal direction of the vacuum space and is away from the second plate.

Fourth, the second plate may include the second curved portion. A portion of the second curved portion may include a portion connected to the side plate. The portion connected to the side plate may be provided at a position away from the first plate in a portion of the second plate extending in the longitudinal direction of the vacuum space. The present invention may include a combination of any one of the first and second examples described above and any one of the third and fourth examples described above.

In the present invention, the vacuum space (50) can be defined as a third space. The vacuum space can be a space where vacuum pressure is maintained. In the present invention, the expression that A has a higher vacuum degree than B means that the vacuum pressure of A is lower than the vacuum pressure of B.

In the present invention, the sealing portion (61) may be a portion provided between the first plate and the second plate. Examples related to the sealing are as follows. The present invention may be one of the following examples or an example in which two or more are combined. The sealing may include fusion welding that combines the plurality of objects by melting at least a portion of the plurality of objects. For example, the first plate and the second plate may be fused by laser welding or the like in a state in which no medium is interposed. As another example, a portion of the first and second plates and a portion of the component fastening portion may be fused by high-frequency brazing or the like in a state in which a medium such as a filler metal is interposed. As another example, the plurality of objects may be fused by a heat-generating medium. The sealing may include pressure welding that combines the plurality of objects by pressure applied to at least a portion of the plurality of objects.

For example, as a component connected to the above-mentioned component joint, an object made of a material having a smaller deformation resistance than the above-mentioned plate can be press-welded by a method such as pinch-off.

A machine room (8) may optionally be provided on the outside of the vacuum insulator. The machine room may be defined as a space in which components connected to the refrigerant are stored. Optionally, the vacuum insulator may include a pipe (40). The pipe may be provided on either side of the vacuum insulator. The pipe may be provided to exhaust air in the vacuum space (50).

Optionally, the vacuum insulation body may include a conduit (64) penetrating the vacuum space portion (50) for installation of a component connected to the first space and the second space. Examples of the aforementioned conduit may be ports such as exhaust ports or getter ports.

FIG. 3 is a drawing showing an embodiment of a support for maintaining the above vacuum space. Examples of the support are as follows. The present invention may be any one of the examples below or an example in which two or more are combined.

The above support (30, 31, 33, 35) can reduce deformation of at least a portion of the vacuum space (50), the plate, and the heat transfer resistor to be described later due to external force.

To this end, at least a portion of the plate and the heat transfer resistor to be described later may be provided to support. The external force may include at least one of vacuum pressure and an external force other than the vacuum pressure. The deformation may occur in a direction in which the height of the vacuum space portion decreases. In this case, the support may reduce an increase in at least one of radiation heat conduction, gas heat conduction, surface heat conduction, and support heat conduction to be described later.

The support may be an object provided to maintain a gap between the first plate and the second plate. The support may be an object provided to support the heat transfer resistor. The support may have a greater degree of deformation than the plate. The support may be provided in a portion of the vacuum insulator, a device having the vacuum insulator, and a wall having the vacuum insulator, among other portions, in which the degree of deformation is weak.

In the present invention, the degree of deformation resistance can indicate the degree to which an object resists deformation due to an external force applied to the object. The degree of deformation resistance can be defined as a value determined by the shape including the thickness of the object, the material of the object, the processing method of the object, etc. Examples of parts where the degree of deformation resistance is weak can include the vicinity of the curved portion formed by the plate, at least a portion of the curved portion, the vicinity of an opening formed in the body of the device provided by the plate, and at least a portion of the opening.

The support may be arranged to surround at least a portion of the curved portion or the opening. The support may be provided to correspond to the shape of the curved portion or the opening. However, it is not excluded that the support may be provided in a portion other than the above. The opening may be understood as a portion of a device including a main body and a door capable of opening and closing the opening formed in the main body.

Examples of how the support is provided to support the plate are as follows. First, at least a portion of the support may be provided in a space formed inside the plate. The plate may include a portion having a plurality of layers. The support may be provided between the plurality of layers. Optionally, the support may be provided to be connected to at least a portion of the plurality of layers. The support may be provided to support at least a portion of the plurality of layers. Second, at least a portion of the support may be provided to be connected to a surface formed on the outside of the plate. The support may be provided in the vacuum space or an external space of the vacuum space. As an example, the plate may include a plurality of layers. The support may be provided in any one of the plurality of layers. Optionally, the support may be provided to support another one of the plurality of layers. As another example, the plate may include a plurality of portions extending in the longitudinal direction.

The support may be provided as one of the plurality of parts. Optionally, the support may be provided to support another one of the plurality of parts. As another example, the support may be provided as a component separate from the plate in the vacuum space or an external space of the vacuum space. Optionally, the support may be provided to support at least a portion of a surface formed on the outside of the plate. Optionally, the support may be provided to support one surface of the first plate and one surface of the second plate.

One side of the first plate and one side of the second plate may be provided to face each other.

Third, the support may be provided integrally with the plate. The example in which the support is provided to support the heat transfer resistor may be understood as an example in which the support is provided to support the plate. Duplicate explanations are omitted.

Examples of a design in which heat transfer via the support is reduced are as follows. First, at least a portion of a component positioned near the support may be provided so as not to come into contact with the support. At least a portion of a component positioned near the support may be provided so as to be positioned in an empty space provided by the support. Examples of the component may include at least one of a heat transfer resistor to be described below, an exhaust port, a getter port, a pipe or component connected to the plate, a pipe or component penetrating the vacuum space, and a pipe or component at least a portion of which is positioned in the vacuum space.

Examples of the above-mentioned pipes may be ports such as exhaust ports or getter ports. Examples of the above-mentioned empty space may include at least one of an empty space provided inside the support, an empty space provided between a plurality of supports, and an empty space provided between a support and a separate component distinct from the support.

Optionally, at least a portion of the component may be disposed in a through hole formed in the support or disposed in at least one of a plurality of bars, a plurality of connecting plates, and a plurality of supporting plates. Optionally, at least a portion of the component may be disposed in at least one of a space spaced between the plurality of bars, a space spaced between the plurality of connecting plates, and a spaced between the plurality of supporting plates. Secondly, an insulation material may be provided on or near at least a portion of the support.

The insulation may be provided so as to be in contact with the support or may not be provided so as to be in contact with the support. The insulation may be provided at a portion where the support and the plate come into contact. The insulation may be provided over at least a portion of one side and/or the other side of the support. The insulation may be provided so as to cover at least a portion of the one side and/or the other side of the support. The insulation may be provided over at least a portion of the vicinity of the one side of the support and the vicinity of the other side of the support.

The above insulation may be provided to cover at least a portion of a vicinity of one side of the support and a vicinity of the other side of the support. The support may include a plurality of bars. The insulation may be arranged in a region from a point where any one of the plurality of bars is located to a midpoint between any one bar and the surrounding bars. Third, in a case where cold air is transmitted through the support, a heat source may be arranged at a location where the insulation described in the second example is arranged. In a case where the temperature of the first space is lower than the temperature of the second space, the heat source may be arranged at or near the second plate. In a case where heat is transmitted through the support, a cold source may be arranged at a location where the insulation described in the second example is arranged.

If the temperature of the first space is higher than the temperature of the second space, the cold source may be placed at or near the second plate. As a fourth example, the support may have a higher heat transfer resistance than the metal. The support may include a portion having a higher heat transfer resistance than the plate. The support may include a portion having a lower heat transfer resistance than the additional insulation.

The above support may include at least one of non-metallic materials, PPS and GF, and LCP. This is because it can obtain high compressive strength, low outgassing and water absorption, low thermal conductivity, high compressive strength at high temperature, and excellent processability.

Examples of the above support may include a bar (30, 31), a connecting plate (35), a support plate (35), a porous material (33), and a filler (33). In the present invention, the support may include any one of the above examples or an example in which at least two are combined.

As a first example, the support may include a bar (30, 31). The bar may support a gap between the first plate and the second plate. To this end, the bar may include a portion extending in a direction connecting the first plate and the second plate. The bar may include at least one of a portion extending in a height direction of the vacuum space and a portion extending in a direction substantially perpendicular to a direction in which the plates extend. The bar may be provided to support only one of the first plate and the second plate. The bar may be provided to support both the first plate and the second plate.

For example, one surface of the bar may be provided to support a portion of the plate. The other surface of the bar may be provided so as not to contact another portion of the plate. As another example, one surface of the bar may be provided to support at least a portion of the plate. The other surface of the bar may be provided to support another portion of the plate.

The support may include a bar having a void space provided therein. The support may include a plurality of bars, and a void space may be provided between the plurality of bars. The support may include a bar, and the bar may be arranged so that a void space is provided between the bar and a separate part provided separately. The support may include a portion connected to the bar.

The above support may optionally include a connecting plate (35) including a portion connecting the plurality of bars. The connecting plate may include at least one of a portion extending in the longitudinal direction of the vacuum space and a portion extending along the direction in which the plate extends. An XZ-plane cross-sectional area of the connecting plate may be larger than an XZ-plane cross-sectional area of the bar. The connecting plate may be provided on at least one of one surface and the other surface of the bar, or may be provided between the one surface and the other surface of the bar.

At least one of the one side and the other side of the bar may be a side on which the bar supports the plate. The shape of the connecting plate is not limited. The support may include a connecting plate having an empty space provided therein. The support may include a plurality of connecting plates, and an empty space may be provided between the plurality of connecting plates. The support may include a connecting plate.

The above connecting plate may be arranged so that a void is provided between the connecting plate and the separate part provided separately. As a second example, the support may include a support plate (35). The support plate may include at least one of a portion extending in the longitudinal direction of the vacuum space portion and a portion extending along the direction in which the plate extends. The support plate may be provided so as to support only one of the first plate and the second plate.

The support plate may be provided to support both the first plate and the second plate. For example, one surface of the support plate may be provided to support a portion of the plate. The other surface of the support plate may be provided so as not to contact the other portion of the plate. As another example, one surface of the support plate may be provided to support at least a portion of the plate. The other surface of the support plate may be provided to support the other portion of the plate. The cross-sectional shape of the support plate is not limited.

The support may include a support plate having an empty space provided therein. The support may include a plurality of support plates, and an empty space may be provided between the plurality of support plates. The support may include a support plate, and the support plates may be arranged so that an empty space is provided between separate parts provided separately from the support plates.

As a third example, the support may include a porous material (33) or a filler (33). The interior of the vacuum space may be supported by the porous material or the filler. The interior of the vacuum space may be completely filled by the porous material or the filler. The support may include a plurality of porous materials or a plurality of fillers. The plurality of porous materials or the plurality of fillers may be arranged to be in contact with each other or separately.

A void space may be provided inside the porous material. A void space may be provided between a plurality of porous materials. A void space may be provided between the porous material and a separate component distinct from the porous material. In this case, it may be understood that the porous material includes any one of the above-mentioned bars, connecting plates, and supporting plates.

A void space may be provided within the filler, or a void space may be provided between a plurality of fillers, or a void space may be provided between the filler and a separate component distinct from the filler. In this case, it may be understood that the filler includes any one of the above-described bars, connecting plates, and supporting plates. The support of the present invention may include any one of the above-described examples, or an example in which two or more are combined.

Referring to FIG. 3a, as an example, the support may include a bar (31), and a connecting plate and supporting plate (35). The connecting plate and the supporting plate may be designed separately. Referring to FIG. 3b, as an example, the support may include a bar (31), a connecting plate and supporting plate (35), and a porous material (33) filled inside a vacuum space.

The porous material (33) may have a higher emissivity than the stainless steel, which is the material of the plate. However, since it fills the vacuum space, the resistance efficiency of radiation heat transfer is high. The porous material may also perform the function of a heat transfer resistor, which will be described later. More preferably, the porous material may perform the function of a radiation resistance sheet, which will be described later. Referring to FIG. 3c, as an example, the support may include at least one of the porous material (33) and the filler (33). The porous material (33) and the filler may be provided in a compressed state so as to maintain a gap in the vacuum space.

The film (34) may be provided as a PE material with holes, for example. The porous material (33) or the filler may perform the function of the heat transfer resistance body described later and the function of the support together. More preferably, the porous material may perform the function of the radiation resistance sheet described later and the function of the support together.

FIG. 4 is a drawing explaining an embodiment of a vacuum insulation body centered on a heat transfer resistor. The vacuum insulation body of the present invention may optionally include a heat transfer resistor. Examples of the heat transfer resistor are as follows. The present invention may be one of the examples below or an example in which two or more are combined.

The heat transfer resistor (32, 33, 60, 63) may be an object that reduces the amount of heat transfer between the first space and the second space. The heat transfer resistor (32, 33, 60, 63) may be an object that reduces the amount of heat transfer between the first plate and the second plate. The heat transfer resistor may be arranged on a heat transfer path formed between the first space and the second space. The heat transfer resistor (32, 33, 60, 63) may be arranged on a heat transfer path formed between the first plate and the second plate. The heat transfer resistor may include a portion that extends in a direction along a wall defining the vacuum space.

The heat transfer resistor may include a portion extending along the direction in which the plate extends. Optionally, the heat transfer resistor may include a portion extending away from the plate in a direction away from the vacuum space. The heat transfer resistor may be provided on at least a portion of at least one of a periphery of the first plate and a periphery of the second plate.

The heat transfer resistor may be provided on at least a portion of at least one of the edges of the first plate and the edges of the second plate. The heat transfer resistor may be provided in a portion where a through hole is formed. The heat transfer resistor may be provided as a tube connected to the through hole. A separate tube or separate component distinct from the tube may be arranged inside the tube.

Examples of the above-mentioned pipes may be ports such as exhaust ports or getter ports. The heat transfer resistor may include a portion having a greater heat transfer resistance than the plate. In this case, the insulation performance of the vacuum insulation body may be further improved. A shield (62) may be provided on the outside of the heat transfer resistor to provide insulation. The inside of the heat transfer resistor may be insulated by a vacuum space. The shield may be provided as a porous material or filler that comes into contact with the outside of the inside of the heat transfer resistor.

The above shielding member may be provided as an insulating structure. The above shielding member may be exemplified by a separate gasket placed on the outside of the inside of the heat transfer resistor. The heat transfer resistor may be a wall defining the third space.

The example in which the heat transfer resistor is provided connected to the plate can be understood as replacing the support with the heat transfer resistor in the example in which the support is provided to support the plate. Duplicate descriptions will be omitted. The example in which the heat transfer resistor is provided connected to the support can be understood as replacing the plate with the support in the example in which the heat transfer resistor is provided connected to the plate. Duplicate descriptions will be omitted. The example of reducing heat transfer via the heat transfer resistor can be applied as replacing the example in which heat transfer via the support is reduced. The same descriptions will be omitted.

In the present invention, the heat transfer resistor may be at least one of a radiation resistance sheet (32), a porous material (33), a filler (33), and a conduction resistance sheet. In the present invention, the heat transfer resistor may include a mixture of at least two of the radiation resistance sheet (32), the porous material (33), the filler (33), and the conduction resistance sheet. As a first example, the heat transfer resistor may include a radiation resistance sheet (32).

The above-described radiation resistance sheet may include a portion having a greater heat transfer resistance than the above-described plate. At this time, the heat transfer resistance may be a degree of resistance to heat transfer by radiation. The support may also perform the function of the radiation resistance sheet. The conductive resistance sheet, which will be described later, may also perform the function of the radiation resistance sheet. As a second example, the heat transfer resistance body may include a conductive resistance sheet (60, 63).

The above-mentioned conductive resistance sheet may include a portion having a greater heat transfer resistance than the above-mentioned plate. In this case, the heat transfer resistance may be a degree of resistance to heat transfer by conduction. For example, the conductive resistance sheet may have a thickness smaller than at least a portion of the above-mentioned plate. As another example, the conductive resistance sheet may include one end and the other end. The length of the conductive resistance sheet may be longer than the straight-line distance connecting one end of the conductive resistance sheet and the other end of the conductive resistance sheet.

As another example, the conductive resistance sheet may include a material having a higher heat transfer resistance due to conduction than the plate. As another example, the heat transfer resistance body may include a portion having a smaller radius of curvature than the plate.

Referring to FIG. 4a, as an example, a conductive resistance sheet may be provided on a side plate connecting the first plate and the second plate. Referring to FIG. 4b, as an example, a conductive resistance sheet (60) may be provided on at least a portion of the first plate and the second plate. A connecting frame (70) may be further provided on the outside of the conductive resistance sheet. The connecting frame may be an extended portion of the first plate or the second plate. The connecting frame may be an extended portion of the side plate.

Optionally, the connecting frame (70) may include a part where a first part for sealing the door and the body, and a second part, such as an exhaust port required for an exhaust process and a getter port for maintaining vacuum, which are arranged on the outside of the vacuum space, are connected to each other.

Referring to FIG. 4c, for example, a conductive resistance sheet may be provided on a side plate connecting the first plate and the second plate. The conductive resistance sheet may be installed in a through hole penetrating the vacuum space. The conduit (64) may be separately provided on the outside of the conductive resistance sheet. The conductive resistance sheet may be provided in a wrinkled shape. Through this, a heat transfer path can be lengthened, and deformation due to a pressure difference can be prevented. A separate shielding member for insulating the conductive resistance sheet (63) may also be provided. The conductive resistance sheet may include a portion having a degree of deformation smaller than at least one of the plate, the radiation resistance sheet, and the support. The radiation resistance sheet may include a portion having a degree of deformation smaller than at least one of the plate and the support. The plate may include a portion having a degree of deformation smaller than that of the support. The above-described conductive resistance sheet may include a portion having a conductive heat transfer resistance greater than at least one of the plate, the radiation resistance sheet, and the support. The above-described radiation resistance sheet may include a portion having a radiation heat transfer resistance greater than at least one of the plate, the conductive resistance sheet, and the support. The above-described support may include a portion having a heat transfer resistance greater than that of the plate.

For example, at least one of the plate, the conductive resistance sheet, and the connecting frame may include a stainless steel material. The radiation resistance sheet may include an aluminum material. The support may include a resin material.

Figure 5 is a graph that observes the process of exhausting the inside of a vacuum insulator with respect to time and pressure when a support is used. Examples of the vacuum insulator vacuum exhaust step are as follows. The present invention may be one of the examples below or a combination of two or more examples.

During the above exhaust step, an outgassing step may be performed, which is a process in which gas in the vacuum space and potential gas remaining in the components of the vacuum insulation are exhausted. As an example of the above outgassing step, the exhaust step may include at least one of a step of heating or drying the vacuum insulation, a step of providing vacuum pressure to the vacuum insulation, and a step of providing a getter to the vacuum insulation. In this case, it is possible to promote vaporization and exhaust of potential gas remaining in the components provided in the vacuum space. The exhaust step may include a step of cooling the vacuum insulation. The cooling step may be performed after the step of heating or drying the vacuum insulation is performed. Preferably, the step of heating or drying the vacuum insulation and the step of providing vacuum pressure to the vacuum insulation may be performed together.

Preferably, the step of heating or drying the vacuum insulator and the step of providing a getter to the vacuum insulator can be performed together. Preferably, after the step of heating or drying the vacuum insulator is performed, the step of cooling the vacuum insulator can be performed. Preferably, the step of providing vacuum pressure to the vacuum insulator and the step of providing a getter to the vacuum insulator can be performed so as not to overlap each other.

For example, after the step of providing vacuum pressure to the vacuum insulator is performed, the step of providing a getter to the vacuum insulator may be performed. When the vacuum pressure is provided to the vacuum insulator, the pressure of the vacuum space may decrease to a certain level and may not decrease further. At this time, the step of providing the vacuum pressure to the vacuum insulator may be stopped, and then the getter may be introduced. An example of stopping the step of providing the vacuum pressure to the vacuum insulator may be that the operation of a vacuum pump connected to the vacuum space is stopped. When the getter is introduced, the step of heating and/or drying the vacuum insulator may be performed together. Through this, outgassing can be promoted. As another example, the step of providing the getter to the vacuum insulator may be performed after the step of providing the getter to the vacuum insulator is performed.

The time during which the above vacuum insulation body vacuum exhaust step is performed may be referred to as the vacuum exhaust time. The vacuum exhaust time may include at least one of the time (△t1) during which the vacuum insulation body is heated and/or dried, the time (△t2) during which the vacuum insulation body is maintained in a state in which a getter is introduced, and the time (△t3) during which the vacuum insulation body is cooled. Examples of △t1, △t2, and △t3 are as follows. Any one of the following examples of the present invention or a combination of two or more examples may be used. In the above vacuum insulation body vacuum exhaust step, △t1 may be equal to or greater than t1a and equal to or less than t1b. As a first example, t1a may be greater than or equal to 0.2 hr and less than or equal to 0.5 hr. The t1b may be greater than or equal to 1 hr and less than or equal to 24.0 hr.

Preferably, the △t1 may be 0.3 hr or more and 12.0 hr or less. Preferably, the △t1 may be 0.4 hr or more and 8.0 hr or less. More preferably, the △t1 may be 0.5 hr or more and 4.0 hr or less. In this case, it may be applied to a vacuum insulator having sufficient outgassing even when △t1 is kept as short as possible. For example, it may be the case that among the components of the vacuum insulator, a component exposed to the vacuum space includes a portion having a lower outgassing rate than any one of the components among the components of the vacuum insulator that are exposed to the external space of the vacuum space. Specifically, the component exposed to the vacuum space may include a portion having a lower outgassing rate than a thermoplastic plastic.

More specifically, a support or a radiation resistance sheet is arranged in the vacuum space, and the outgassing rate of the support may be lower than that of the thermoplastic plastic. As another example, a part of the vacuum insulation body that is exposed to the vacuum space may include a part that has a higher operating temperature than any one of the parts of the vacuum insulation body that is exposed to the external space of the vacuum space.

In this case, the vacuum insulation body can be heated to a higher temperature, thereby increasing the outgassing rate. For example, the component exposed to the vacuum space may include a portion having a higher operating temperature than the thermoplastic plastic. As a more specific example, a support or a radiation resistance sheet may be placed in the vacuum space, and the operating temperature of the support may be higher than that of the thermoplastic plastic.

As another example, among the components of the vacuum insulator, a component exposed to the vacuum space may include a larger portion of the metallic material than the portion of the non-metallic material. That is, the mass of the metallic material may be greater than the mass of the non-metallic material. The volume of the metallic material may be greater than the volume of the non-metallic material. The area of the metallic material exposed to the vacuum space may be greater than the area of the non-metallic material exposed to the vacuum space. In the case where there are a plurality of components exposed to the vacuum space, the sum of the volume of the metallic material included in the first component and the volume of the metallic material included in the second component may be greater than the sum of the volume of the non-metallic material included in the first component and the volume of the non-metallic material included in the second component. In the case where there are plural parts exposed to the vacuum space, the sum of the mass of the metallic material included in the first part and the mass of the metallic material included in the second part may be greater than the sum of the mass of the non-metallic material included in the first part and the mass of the non-metallic material included in the second part. In the case where there are plural parts exposed to the vacuum space, the sum of the area of the metallic material included in the first part exposed to the vacuum space and the area of the metallic material included in the second part exposed to the vacuum space may be greater than the sum of the area of the non-metallic material included in the first part exposed to the vacuum space and the area of the non-metallic material included in the second part exposed to the vacuum space.

As a second example, the t1a may be a value greater than or equal to 0.5 hr and less than or equal to 1 hr. The t1b may be greater than or equal to 24.0 hr and less than or equal to 65 hr. Preferably, the △t1 may be greater than or equal to 1.0 hr and less than or equal to 48.0 hr. Preferably, the △t1 may be greater than or equal to 2 hr and less than or equal to 24.0 hr. More preferably, the △t1 may be greater than or equal to 3 hr and less than or equal to 12.0 hr.

In this case, it may be a vacuum insulator that needs to maintain △t1 as long as possible. This case may be, for example, the opposite cases of the examples described in the first example above, or a case where the component exposed to the vacuum space is a thermoplastic material. Duplicate descriptions will be omitted. In the vacuum insulator vacuum exhaust step, the △t2 may be equal to or greater than t2a and equal to or less than t2b. The t2a may be equal to or greater than 0.1 hr and equal to or less than 0.3 hr. The t2b may be equal to or greater than 1 hr and equal to or less than 5.0 hr.

Preferably, the above △t2 may be 0.2 hr or more and 3.0 hr or less. More preferably, the above △t2 may be 0.3 hr or more and 2.0 hr or less. More preferably, the above △t2 may be 0.5 hr or more and 1.5 hr or less. In this case, the vacuum insulation body may be sufficiently outgassing through the getter even when △t2 is kept as short as possible.

In the above vacuum insulation body vacuum exhaust step, the above △t3 may be greater than or equal to t3a and less than or equal to t3b.

The above t3a may be greater than or equal to 0.2 hr and less than or equal to 0.8 hr. The above t3b may be greater than or equal to 1 hr and less than or equal to 65.0 hr. Preferably, the above △t3 may be greater than or equal to 0.2 hr and less than or equal to 48.0 hr. Preferably, the above △t3 may be greater than or equal to 0.3 hr and less than or equal to 24.0 hr. More preferably, the above △t3 may be greater than or equal to 0.4 hr and less than or equal to 12.0 hr. More preferably, the above △t3 may be greater than or equal to 0.5 hr and less than or equal to 5.0 hr. After the heating and/or drying steps are performed in the above exhaust step, the above cooling step may be performed.

For example, if the time for which the heating and/or drying step is performed is long, △t3 may become long. The vacuum insulation body of the present invention may be manufactured so that △t1 is greater than △t2, or so that △t1 is less than or equal to △t3, or so that △t3 is greater than △t2.

Preferably, △t2<△t1≤△t3. The vacuum insulator of the present invention can be manufactured so that △t1+△t2+△t3 is greater than or equal to 0.3 hr and less than or equal to 70 hr. The vacuum insulator of the present invention can be manufactured so that △t1+△t2+△t3 is greater than or equal to 1 hr and less than or equal to 65 hr.

The vacuum insulator of the present invention can be manufactured so that △t1+△t2+△t3 is greater than or equal to 2 hr and less than or equal to 24 hr. More preferably, △t1+△t2+△t3 can be manufactured so that it is greater than or equal to 3 hr and less than or equal to 6 hr.

Here are examples of vacuum pressure conditions during the above exhaust step. The present invention may be one of the examples below or a combination of two or more of them. During the exhaust step, the lowest value of the vacuum pressure in the vacuum space may be greater than 1.8E-6 Torr. Preferably, the lowest value of the vacuum pressure may be greater than 1.8E-6 Torr and less than or equal to 1.0E-4 Torr. The lowest value of the vacuum pressure may be greater than 0.5E-6 Torr and less than or equal to 1.0E-4 Torr. The lowest value of the vacuum pressure may be greater than 0.5E-6 Torr and less than or equal to 0.5E-5 Torr. More preferably, the lowest value of the vacuum pressure may be greater than 0.5E-6 Torr and less than 1.0E-5 Torr.

In this way, the minimum value of the vacuum pressure provided during the exhaust step can be limited. This is because, even if depressurization is performed with a vacuum pump during the exhaust step, the degree to which the vacuum pressure decreases is slowed down below a certain level.

As an example, after the exhaust step is performed, the vacuum pressure of the vacuum space may be maintained at a pressure greater than or equal to 1.0E-5 Torr and less than or equal to 5.0E-1 Torr. The maintained vacuum pressure may be greater than or equal to 1.0E-5 Torr and less than or equal to 1.0E-1 Torr. The maintained vacuum pressure may be greater than or equal to 1.0E-5 Torr and less than or equal to 1.0E-2 Torr. The maintained vacuum pressure may be greater than or equal to 1.0E-4 Torr and less than or equal to 1.0E-2 Torr. The maintained vacuum pressure may be greater than or equal to 1.0E-5 Torr and less than or equal to 1.0E-3 Torr. The maintained vacuum pressure may be a pressure greater than or equal to 1.0E-4 Torr and less than or equal to 1.0E-3 Torr. The vacuum insulator of the example presents the results of predicting the change in the vacuum pressure through an acceleration experiment of two exemplary products. One of them confirmed that the vacuum pressure was maintained below 1.0E-04 Torr even after 16.3 years, and the other confirmed that the vacuum pressure was maintained below 1.0E-04 Torr even after 17.8 years.

The vacuum pressure of a vacuum insulator must be maintained below a certain level even with aging to be used industrially.

Figure 5a is a graph of the elapsed time and pressure of an exhaust process according to an example, and Figure 5b explains the results of a long-term vacuum maintenance experiment conducted as an accelerated experiment on a vacuum insulator of a refrigerator having an internal volume of 128 liters.

Referring to Fig. 5b, it can be seen that the vacuum pressure gradually increases with the passage of time. For example, it can be confirmed that it reaches 6.7E-04 Torr after 4.7 years, 1.7E-03 Torr after 10 years, and 1.0E-02 Torr after 59 years. According to these experimental results, it can be confirmed that the vacuum insulator according to the embodiment is sufficiently applicable to industrial applications.

FIG. 6 is a graph comparing vacuum pressure and gas conductivity. Referring to FIG. 6, the gas conductivity according to vacuum pressure is represented as a graph of the actual heat transfer coefficient (eK) according to the size of the gap inside the vacuum space (50). The gap of the vacuum space was measured in three cases of 3 mm, 4.5 mm, and 9 mm. The gap of the vacuum space is defined as follows. When the radiation resistance sheet (32) is inside the vacuum space, it may be the distance between the radiation resistance sheet and the adjacent plate. When the radiation resistance sheet is not inside the vacuum space, it may be the distance between the first plate and the second plate. It was found that the point corresponding to the conventional actual heat transfer coefficient of 0.0196 W/mk, which provides insulation by foaming polyurethane, is 5.0E-1 Torr even when the gap size is small, 3 mm.

Meanwhile, it was confirmed that the point at which the reduction effect of the insulation effect due to gas conduction heat is saturated even when the vacuum pressure is lowered is approximately 4.5E-3 Torr. The pressure of 4.5E-3 Torr can be confirmed as the point at which the reduction effect of gas conduction heat is saturated.

Also, when the actual heat transfer coefficient is 0.01 W/mk, it is 1.2E-2 Torr. An example showing the range of vacuum pressure in a vacuum space according to a gap is given. The support may include at least one of a bar, a connecting plate, and a support plate. In this case, when the gap of the vacuum space is greater than or equal to 3 mm, the vacuum pressure may be greater than or equal to A (A will be described later) and less than 5E-1 Torr. The vacuum pressure may be greater than 2.65E-1 Torr and less than 5E-1 Torr.

In another example, the support may include at least one of a bar, a connecting plate, and a supporting plate. In this case, the gap of the vacuum space may be greater than or equal to 4.5 mm. In this case, the vacuum pressure may be greater than or equal to A and less than 3E-1 Torr. The vacuum pressure may be greater than 1.2E-2 Torr and less than 5E-1 Torr. In another example, the support may include at least one of a bar, a connecting plate, and a supporting plate, and the gap of the vacuum space may be greater than or equal to 9 mm. In this case, the vacuum pressure may be greater than or equal to A and less than 1.0×10^-1 Torr. The vacuum pressure may be greater than 4.5E-3 Torr and less than 5E-1 Torr.

Here, A may be a value greater than or equal to 1.0×10^-6 Torr and less than or equal to 1.0E-5 Torr. Preferably, A may be a value greater than or equal to 1.0×10^-5 Torr and less than or equal to 1.0E-4 Torr. When the support includes a porous material or a filler, the vacuum pressure may be greater than or equal to 4.7E-2 Torr and less than or equal to 5E-1 Torr. In this case, it can be understood that the size of the gap is from several micrometers to hundreds of micrometers. When the support and the porous material are provided together in the vacuum space, an intermediate vacuum pressure between the case where only the support is used and the case where only the porous material is used can be created and used.

Figure 7 is a drawing explaining the manufacturing process of a vacuum insulation body.

Optionally, the vacuum insulator can be manufactured by a vacuum insulator component preparation step in which the first plate and the second plate are prepared in advance. Optionally, the vacuum insulator can be manufactured by a vacuum insulator component assembly step in which the first plate and the second plate are assembled. Optionally, the vacuum insulator can be manufactured by a vacuum insulator vacuum exhaust step in which gas in a space formed between the first plate and the second plate is exhausted. Optionally, after the vacuum insulator component preparation step is performed, the vacuum insulator component assembly step and/or the vacuum insulator vacuum exhaust step can be performed.

Optionally, after the vacuum insulator component assembly step is performed, the vacuum insulator vacuum exhaust step may be performed. Optionally, the vacuum insulator may be manufactured by a vacuum insulator component sealing step (S3) in which a space between the first plate and the second plate is sealed. The vacuum insulator component sealing step may be performed before the vacuum insulator vacuum exhaust step (S4). The vacuum insulator may be manufactured by a device assembling step (S5) in which the vacuum insulator is combined with components constituting the device. The vacuum insulator may be manufactured into an object having a predetermined purpose by the device assembling step (S5). The device assembling step may be performed after the vacuum insulator vacuum exhaust step.

Here, the components constituting the device may mean components constituting the device together with the vacuum insulator.

The above vacuum insulator component preparation step (S1) may be a step in which components constituting the vacuum insulator are prepared or manufactured. Examples of components constituting the vacuum insulator may include various components such as plates, supports, heat transfer resistors, and pipes. The vacuum insulator component assembly step (S2) may be a step in which the prepared components are assembled. The vacuum insulator component assembly step may include a step in which at least a portion of the support and the heat transfer resistor are arranged on at least a portion of the plate.

For example, the vacuum insulator component assembly step may include a step in which at least a portion of the support and the heat transfer resistor are disposed between the first plate and the second plate. Optionally, the vacuum insulator component assembly step may include a step in which a through-hole component is disposed on at least a portion of the plates. For example, the vacuum insulator component assembly step may include a step in which a through-hole component or a surface component is disposed between the first and second plates. After the through-hole component is disposed between the first plate and the second plate, the through-hole component may be connected or sealed to the through-hole component fastening portion.

Here are examples of the vacuum insulator vacuum exhaust step. The present invention may be one of the examples below or a combination of two or more of them. The vacuum insulator vacuum exhaust step may include at least one of a step of inserting the vacuum insulator into an exhaust path, a getter activation step, a vacuum leak checking step, and an exhaust port closing step. The step of forming the component fastening portion may include at least one of the vacuum insulator component preparation step, the vacuum insulator component assembling step, and the device assembling step. Before the vacuum insulator vacuum exhaust step is performed, a step of washing the components constituting the vacuum insulator may be performed. Optionally, the washing step may include a step of applying ultrasonic waves to the components constituting the vacuum insulator, and/or a step of providing ethanol or a material containing ethanol on the surface of the components constituting the vacuum insulator. The ultrasonic waves may have an intensity of 10 kHz to 50 kHz. The content of ethanol in the material may be 50% or more. For example, the content of ethanol in the material may be from 50% to 90% or less. As another example, the content of ethanol in the material may be from 60% to 80% or less.

As another example, the content of ethanol in the material may be from 65% to 75% or less. Optionally, after the washing step is performed, a step of drying the components constituting the vacuum insulator may be performed. Optionally, after the washing step is performed, a step of heating the components constituting the vacuum insulator may be performed.

A heat exchanger may be installed in the vacuum insulator. The following may be optional. The heat exchanger may connect the first space and the second space. The heat exchanger may exchange heat between the refrigerant discharged from the evaporator and the refrigerant sucked into the evaporator. At least a part of the heat exchanger may be placed in the third space.

Matters and descriptions disclosed in any drawing of this document may provide different embodiments. Matters disclosed in any drawing of this document may be applied to the contents of other drawings.

Figure 8 shows an example of how a support and a heat exchanger are installed.

The following may be optional. Referring to FIG. 8, the heat exchanger (57) may be installed on the rear side of the vacuum insulation body. A first end of a refrigerant pipe forming the heat exchanger may be led out to a machine room (8). The machine room may be placed in a second space. A second end of a refrigerant pipe forming the heat exchanger may be led out to a low-temperature space. The low-temperature space may be placed in the first space. The heat exchanger may be provided with a predetermined length to enable sufficient heat exchange. The heat exchanger may have a bent portion. The heat exchanger may have a straight portion extending in a straight line. At least two or more of the straight portions may be provided. A bend portion may be provided between the straight portions. At least one of the bend portions may be bent in an extension direction of the third space. At least one of the bend portions may be bent in a thickness direction of the third space.

The following may be optional. The support (30) placed on the rear side of the vacuum insulator may be provided as a single structure of one body. The single structure may be provided as a structure in which at least two individual units are connected to each other. The units (301) may be respectively connected vertically. The units (301) may be connected such that the units below and above are alternately connected. Accordingly, the single structure may be provided. There may be a left-right gap on the left and right sides of the units. The bending portion may not be placed in the left-right gap of each unit. Accordingly, the positioning of the bending portion may be convenient. Accordingly, the heat exchanger may be stably supported. When there are two bending portions, the two bending portions may be placed on the same unit. The heat exchanger may pass through at least two units.

The following may be optional. The support may be provided as a lattice structure. The heat exchanger may pass between the lattices. The heat exchanger may be moved while being placed on the single structure. The heat exchanger may be placed on the plate while being placed on the single structure. The support may be made of PPS. The support may be made of PPS containing glass fiber.

Fig. 9 is an example of a support. Fig. 9(a) shows a support whose border is a connecting branch. Fig. 9(b) shows a support whose border is an independent branch. See Fig. 9.

The vacuum insulation body may be provided with at least two spaces. The at least two spaces may be bent. The vacuum space portion together with the vacuum insulation body may also be provided with at least two spaces. The at least two spaces may be connected to each other. The extension directions of the at least two spaces may intersect. For example, they may intersect at 90 degrees. The support may be placed inside each space of the vacuum insulation body. The support may be provided corresponding to each space of the vacuum insulation body. The support may be inserted into each of the at least two spaces. At least two of the supports may be provided. The at least two supports may be in contact with each other. The at least two supports may be in contact with each other at a location where two adjacent spaces of the vacuum insulation body intersect.

The following may be optional. The support may have a support plate (35) having a grid. The support may have a bar (31) extending from an intersection of the grids. The support plate may be provided in a square shape. An edge of the support plate may have an independent branch (352) extending outside the support plate. The independent branch may have a first end fixed to the support plate. The independent branch may have a second end not fixed to the support plate. The second end may not contact the support plate. Here, the support plate may mean a support plate to which the first end is fixed. The second end may be connected to another adjacent independent branch. Two adjacent independent branches may be connected to each other. The second end of the first independent branch and the second end of the second independent branch may be connected to each other. The second end of the first independent branch and the second end of the second independent branch can be connected by a connecting branch (351). The independent branch can be eliminated by the connecting branch. The connecting branch can provide the outermost part of the support. The connecting branch can provide a part of the support plate. At least a part of the connecting branches can be connected to each other.

Figure 10 illustrates that supports having connecting branches are in contact with each other. Figure 10(a) is an inner perspective view. Figure 10(b) is an outer perspective view. See Figure 10.

The first support (30a) and the second support (30b) can contact each other at the corner of the vacuum insulator. The following may be optional. The first support may be provided with a first connecting branch (351a). The second support may be provided with a second connecting branch (351b). The inner surface of the first connecting branch (351a) may contact the side surface of the second connecting branch (351b). Conversely, contact may also be possible. The first and second connecting branches that contact each other may not have bars provided. The movement of the vacuum space portion of the second connecting branch (351b) in the extension direction may be supported by the first connecting branch (351a). The connecting branches may be in linear contact with each other. The first connecting branch (351a) may be supported by the second plate. The support between the connecting branches may be the same for the inner support plate. The support between the above connecting branches can be established for one direction. The support between the above connecting branches can be established for a force that causes the connecting branches to approach each other in at least one of the up-down direction and the left-right direction based on the drawing. The connecting branches can be free for other forces. The connecting branches can have the same thickness as the supporting plate. Accordingly, processing and handling of the unit and the support can be convenient. The connecting branches can have the same width as the supporting plate. Accordingly, processing and handling of the unit and the support can be convenient. The tolerance of the thickness of the connecting branches can be smaller than 0.1 mm. The tolerance can be smaller than the tolerance of the supporting plate. Accordingly, reliability of the contact between the first and second connecting branches can be obtained. The length (l1) of the inner connecting branch can be set to a value obtained by subtracting the length in the thickness direction of the vacuum space from the length (l2) of the outer connecting branch. Accordingly, the specifications of the first and second supports (30a)(30b) may be different from each other. Accordingly, the specifications of the units forming the first and second supports (30a)(30b) may be different from each other. At least one of the first and second side supports may be provided by fastening the units (33a)(33b) to each other. At least one of the first and second side supports may be provided by fastening an opposing structure. At least one of the first and second side supports may be fastened to each other by fastening the first support (31) and the second support (36). The description of the outer support plate may be applied to the description of the inner support plate. The description of one support may be applied to the other support.

Figure 11 illustrates that supports having independent branches are in contact with each other. Figure 11(a) is an inner perspective view. Figure 11(b) is a drawing with the copy resistance sheet removed. See Figure 11.

The first support (30a) and the second support (30b) may contact each other at the corners of the vacuum insulator. The following may be optional. The first support may be provided with a first independent branch (352a). The second support may be provided with a second independent branch (352b). The inner surface of the first independent branch (352a) may contact the side surface of the second independent branch (352b). The independent branches may be in point contact. Conversely, they may also be in contact. The first and second independent branches that are in contact may not have bars provided. The movement of the vacuum space portion of the first independent branch (351a) in the extension direction may be supported by the second independent branch (351b). The second independent branch (351b) may be supported by the second plate. The support between the independent branches may be the same for the inner support plate. The support between the independent branches can be established for one direction. The support between the independent branches can be established for a force that causes the independent branches to approach each other in at least one of the up-down direction and the left-right direction based on the drawing. The independent branches can be free ends for other forces. The independent branches can have the same thickness as the support plate. Accordingly, processing and handling of the unit body and the support can be convenient. The independent branches can have the same width as the support plate. Accordingly, processing and handling of the unit body and the support can be convenient. The tolerance of the thickness of the independent branches can be smaller than 0.1 mm. The tolerance can be smaller than the tolerance of the support plate. Accordingly, reliability of the contact between the first and second independent branches can be obtained. The length (l1) of the inner independent branch can be set to a value obtained by subtracting the length in the thickness direction of the vacuum space from the length (l2) of the outer independent branch. Accordingly, the specifications of the first and second supports (30a)(30b) may be different from each other. Accordingly, the specifications of the units forming the first and second supports (30a)(30b) may be different from each other. At least one of the first and second side supports may be provided by fastening the units (33a)(33b) to each other. At least one of the first and second side supports may be provided by fastening an opposing structure. At least one of the first and second side supports may be fastened to each other by fastening the first support (31) and the second support (36). The description of the outer support plate may be applied to the description of the inner support plate. The description of one support may be applied to the other support.

Another embodiment is described. The following may be applied optionally. The independent branch of a support and the connecting branch of another support may be supported by each other.

In the above embodiment, the two supports are in contact. The above embodiment does not substantially bind each other. Below, an embodiment in which the two supports are bound is described.

FIGS. 12 and 13 are embodiments in which two supports are fixed in at least one direction. FIG. 12 is a perspective view of a support assembly. FIG. 13(a) is a plan view of FIG. 12. FIG. 13(b) is a modified example of FIG. 13(a). FIG. 13(c) is a modified example of FIG. 13(a). See FIGS. 12 and 13.

The two supports (30a)(30b) can be restrained in at least one direction. The following items can be applied selectively. The two supports can be free to move in the direction of penetrating the ground. The two supports can be free to move left and right with respect to the ground. The two supports can be restrained to move up and down with respect to the ground. The two supports can be restrained with respect to at least one direction among the XYZ three-axis directions. The two supports can be fixed with respect to at least one direction among the XYZ three-axis directions.

The following may be applied selectively. The support may include at least one of an outer support plate (35a) and an inner support plate (35b). A fastening portion may be provided at an end of the support plate. The fastening portion may be provided at least one of the inner and outer support plates (35a) of the first and second supports. The fastening portions (358a)(358b)(359a)(359b) may be provided at at least one pair of opposing positions among the inner and outer support plates (35a) of the first and second supports. The fastening portion may be provided in various examples such as a groove, a protrusion, a protrusion, and a key. For example, the fastening portion may be provided as a groove. An end of an opposing support plate may be inserted into the groove. At least one of the outer and inner support plates may not be fastened to each other by the first and second supports. The non-fastened support plate may have a different support structure applied.

The following may be applied optionally. The ends of the first and second supports may act as fixed ends for fixing the opposing supports. The length (l1) of the outermost grid of the inner support plate may be shorter than the length (l2) of the inner grid of the inner support plate. The first and second supports may be fixed to the outer support plates. The first and second supports may be fixed to the inner support plates.

At least one of the first and second supports and the units of the first and second supports may be provided in at least two identical shapes. In other words, multiple supports and units of the same type may be used. At least two supports may be provided. If they are provided in the same shape, it is preferable because the inventory cost can be reduced. The following may be applied selectively. The length (l1) of the outermost grid of the inner support plate may be set to a value obtained by subtracting the length in the thickness direction of the vacuum space from the outermost length (l3) of the outer support plate.

Fig. 14 is an embodiment in which two supports are fixed in at least one direction. Fig. 14(a) is a perspective view of the second support. Fig. 14(b) is a plan view of Fig. 14. See Fig. 14.

The two supports (30a)(30b) can be restrained in at least one direction with respect to each other. The following may be applied selectively. The two supports can be free to move in the direction of penetrating the ground. The two supports can be free to move in the up-down direction with respect to the ground. The two supports can be restrained to move in the left-right direction with respect to the ground. The two supports can be restrained in at least one direction among the XYZ three-axis directions. The two supports can be fixed in at least one direction among the XYZ three-axis directions.

The following may be applied selectively. The support may include at least one of an outer support plate (35a) and an inner support plate (35b). A fastening portion may be provided at an end of the support plate. The fastening portion may be provided two spaced apart from each other on the inner support plates (35b) of the first and second supports. The interval between the two fastening portions may be the same as the interval between the outer and inner support plates. The fastening portions (358a)(358b)(359a)(359b) may be fastened to the inner support plate (35b) of one of the first and second supports (30a) and the ends of the outer and inner support plates (35a)(35b) of the other support (30b). At least one of the first and second supports and the units of the first and second supports may be provided in the same shape. Any of the above supports may have an unsupported free end. In the drawing, a part of the end of the outer support plate of the first support may be provided as a free end. A part of the end of the outer support plate of the first support may be provided as a fixed end.

Fig. 15 is an embodiment in which two supports are fixed in at least two directions. Fig. 15(a) is a perspective view of the second support. Fig. 14(b) is a plan view of Fig. 14. See Fig. 14.

The two supports (30a)(30b) can be restrained in at least two directions. The following may be applied selectively. The two supports can be free to move in the direction of penetrating the ground. The two supports can be restrained to move in the up-down direction with respect to the ground. The two supports can be restrained to move in the left-right direction with respect to the ground. The two supports can be restrained with respect to at least one of the three XYZ axes. The two supports can be fixed with respect to at least one of the three XYZ axes.

The following may be applied selectively. The support may include at least one of an outer support plate (35a) and an inner support plate (35b). A fastening portion may be provided at an end of the support plate. The fastening portions (359a and 359c) (359b and 358b) may be provided two spaced apart from each other on the outer support plate (35a) of the first and second supports. The interval between the two fastening portions may be the same as the interval between the outer and inner support plates. The fastening portion (358a) may be provided one on the inner support plate (35b) of the first and second supports. Here, the fastening portion (358a) may not be provided on the first support. Here, the fastening portion (358a) may be cut off on the first support. For example, the support plate may be cut at the fastening portion (358a) of the inner support plate of the second support (30b), and the fastening portion (358a) of the inner support plate of the first support (30a) may not be cut. The cut end of the first support may be inserted into the fastening portion (358a). The ends of the outer and inner support plates (35a) (35b) of the other support (30a) may be fastened to the two fastening portions of the outer support plates of one of the first and second supports (30b).

The following may be applied selectively. At least one of the units of the first and second supports and the first and second supports may be provided with the same shape before fastening. Any one of the units of the first and second supports and the first and second supports may be cut before fastening. At least one of the units of the first and second supports and the first and second supports may be provided with different shapes before fastening. That is, two types of units may be used. The outer support plate may be provided with the same shape before or after fastening.

Figure 16 details the support of Figure 12. See Figures 12, 13, and 16.

The following may be applied selectively. The length of the outermost grid of the outer support plate may be greater than the length of the outermost grid of the inner support plate. The length of the outermost grid of the outer support plate may be less than the length of the outermost grid of the inner support plate and the thickness of the vacuum space. The length of the outermost grid of the inner support plate may be greater than the thickness of the vacuum space. The length of the outermost grid of the inner support plate may be less than the spacing between adjacent pairs of bars (31). The length (B) by which the outermost grid of the outer support plate extends from the outermost grid of the outer support plate in the first support (30a) is the same as the length (A) by which the outermost grid of the outer support plate extends from the outermost grid of the outer support plate in the second support. Therefore, the support and the unit of the support can be shared.

Fig. 17 describes the support of Fig. 14 in detail. See Fig. 17. The following may be applied optionally. The two spaced fastening portions on the inner support plates (35b) of the first and second supports may be the same as the spacing between the outer and inner support plates. The distance (A) between the ends of the inner and outer support plates of the first support (30a) may be shorter than the distance (B) between the ends of the inner and outer support plates of the second support (30b). This is because the ends of the inner and outer support plates of the second support (30b) are guided by the fastening portions. This is because the ends of the inner and outer support plates of the first support (30a) are not guided. It may be desirable for the connection portion of the inner support plate to be fixed. This is because if an additional object for fixing is placed on the inner side, the accommodation space is reduced.

Fig. 18 describes the support of Fig. 15 in detail. See Fig. 18. The following may be applied selectively. The two spaced fastening portions on the outer support plates (35a) of the first and second supports may be the same as the spacing between the outer and inner support plates. The distance (A) between the ends of the inner and outer support plates of the first support (30a) may be the same as the distance (B) between the ends of the inner and outer support plates of the second support (30b). The spacing (A) (B) may be maintained more accurately than in the case of Fig. 16. This is because the ends of the inner and outer support plates of the first and second supports do not move in the contraction direction of the vacuum pressure due to the fastening portions. However, the spacing may also be maintained in the case of Fig. 16.

Another embodiment is provided. Only one of the outer and inner support plates can be fastened to each other by the fastening member. The other can be provided with the first and second supports integrally. The configuration of the embodiment can be applied to at least one corner of the vacuum insulation body. At least one corner of the vacuum insulation body can be fastened in another manner.

In the above embodiment, the two supports come into contact. In the above embodiment, the two supports can be restrained to each other. In the above embodiment, the two supports can move freely to each other in at least one direction along the XYZ axes. In the following embodiment, the two supports can be restrained to each other more strongly.

Fig. 19 is an example in which two supports are strongly restrained. Fig. 19(a) is a perspective view of two supports. Fig. 19(b) is a front view of a corner portion. Fig. 20 shows the fastening process of the support of Fig. 19. Fig. 20(a) is the second support. Fig. 20(b) is the first support. Fig. 20(c) shows the fastening of the first support and the second support. See Figs. 19 and 20.

The two supports (30a)(30b) can be restrained in three directions. The following items can be applied selectively. The two supports can be restrained from moving in the direction of penetrating the ground. The two supports can be restrained from moving in the up-down direction with respect to the ground. The two supports can be restrained from moving in the left-right direction with respect to the ground. The two supports can be fixed with respect to the XYZ three-axis directions.

The following may be applied selectively. A first extension bar (356a) may be provided at an end of the first support (30a). A second extension bar (356b) may be provided at an end of the second support (30b). A third extension bar (356c) may be provided at a location spaced inward from the second extension bar (356b). The spacing between the second and third extension bars (356b) (356c) may correspond to the thickness of the vacuum space or the length of the bar (31). The extension bar may be formed integrally with at least one of the inner support plate and the outer support plate. The extension bar may be provided together with the bar (31). A sixth fastening portion (357a) may be provided at a side of an end of the first support or the second support. The sixth fastening portion (357a) may be provided on the outer support plate (35a). Seventh and eighth fastening portions (357b)(357c) may be provided on the inner surface of at least one end of the first support and the second support. At least one of the seventh and eighth fastening portions may be provided on the inner support plate (35b). The inner support plates of the first and second supports may not be fastened to each other. The inner support plates of the first and second supports may be fixed to the outer support plate by an extension bar.

The following may be applied selectively. The second extension bar (356b) may be fastened to the sixth fastening portion (357a). The second extension bar and the sixth fastening portion may provide fastening between the first and second supports. The second extension bar and the sixth fastening portion may allow the first and second supports to be fixed to each other. The first extension bar (356a) may be fastened to the seventh fastening portion (357b). The third extension bar (356c) may be fastened to the eighth fastening portion (357c). The fastening of the first extension bar and the seventh fastening portion, and the fastening of the third extension bar and the eighth fastening portion may allow the spacing between the ends of each support to be well maintained. The extension bar and the fastening portion may be fastened to each other in various ways, such as loose fastening, fastening, force-fitting, fixed fastening, screw fastening, and bonding.

According to an embodiment, supports placed in each space with different extension directions of the vacuum space can be strongly integrated. The advantage of increased strength of the vacuum insulation body can be expected.

Fig. 21 is an example in which two supports are most strongly restrained. Fig. 21(a) is a perspective view. Fig. 21(b) is a front view. See Fig. 21.

The two supports (30a)(30b) can be restrained in three directions. The following items can be applied selectively. The two supports can be fixed with respect to the XYZ three-axis directions. If the fastening part is a loose fastening, relative movement in the negative direction can be permitted.

The following may be applied selectively. A first extension bar (356a) may be provided at an end of the first support (30a). A second extension bar (356b) may be provided at an end of the second support (30b). A third extension bar (356c) may be provided at a location spaced inward from the second extension bar (356b). The spacing between the second and third extension bars (356b) (356c) may correspond to the thickness of the vacuum space portion or the length of the bar (31). The extension bar may be formed integrally with at least one of the inner support plate and the outer support plate. The extension bar may be provided together with the bar (31). A sixth fastening portion (357a) may be provided at a side of an end of the first support or the second support. The sixth fastening portion (357a) may be provided on the outer support plate (35a). A seventh fastening portion (357b) may be provided on the inner surface of at least one end of the first support and the second support. A ninth fastening portion (357d) may be provided on the side surface of at least one end of the first support and the second support. At least one of the seventh and ninth fastening portions may be provided on the inner support plate (35b). The seventh and ninth fastening portions (357b)(357d) may be provided together on the first support. The seventh and ninth fastening portions (357b)(357d) may be provided on the same support plate with different provision surfaces on the side and the inner surface. The inner support plates of the first and second supports may be fastened to each other by the third extension bar (356c) and the ninth fastening portion (357d).

The following may be applied selectively. The second extension bar (356b) may be fastened to the sixth fastening portion (357a). The third extension bar (356c) may be fastened to the ninth fastening portion (357d). The fastening of the second extension bar and the sixth fastening portion, and the fastening of the third extension bar (356c) and the ninth fastening portion (357d) may provide fastening between the first and second supports. The fastening of the second extension bar and the sixth fastening portion, and the fastening of the third extension bar (356c) and the ninth fastening portion (357d) may allow the first and second supports to be fixed to each other. The first extension bar (356a) may be fastened to the seventh fastening portion (357b). The fastening of the first extension bar and the seventh fastening member, and the fastening of the third extension bar (356c) and the ninth fastening member (357d) can ensure that the spacing between the ends of each support is well maintained. The extension bar and the fastening member can be fastened to each other in various ways, such as loose fastening, fastening, force-fitting, fixed fastening, screw fastening, and bonding. The outermost grid of the inner support plate of the second support (30b) may not be provided. The outermost grid of the inner support plate of the second support (30b) may be provided. In this case, the outermost grid of the inner support plate of the second support (30b) may be provided in a form connected to the third extension bar. In this case, the outermost grid of the inner support plate of the second support (30b) may be provided in a form connected to the third extension bar. Even if not connected, there is an advantage of improving strength because the moment of inertia increases. The outermost grids of the inner support plates of the first and second supports (30b) may be different from each other.

The following may be applied optionally. The extension bar may support the end of the support. The copy resistance sheet (32) may be extended to the extension bar. The radiation heat blocking effect by the copy resistance sheet may be increased. The contact between the copy resistance sheet and the plate may be blocked by the extension bar. At least one copy resistance sheet among a pair of mutually supported supports may be extended to the extension bar.

According to an embodiment, supports placed in each space with different extension directions of the vacuum space portion can be strongly integrated on both the outside and inside. The advantage of increased strength of the vacuum insulation body can be expected.

According to the present invention, a vacuum insulation body can be conveniently manufactured.

Claims (16)

A first plate having a first temperature; A second plate having a second temperature different from the first temperature; a vacuum space provided between the first plate and the second plate; and To maintain the above vacuum space, a support is included, The above vacuum space portion includes at least two spaces that are bent to each other, The above support includes a first support including a portion inserted into the at least two spaces and extending in a first direction, and a second support including a portion extending in a direction different from the first direction, and the first support and the second support are provided to support or restrict movement of each other in at least one of the three directions of X, Y, and Z. In paragraph 1, The above support is a vacuum insulator including a support plate having a portion extending in the longitudinal direction of the vacuum space. In the second paragraph, A vacuum insulation body in which an independent branch including a first end fixed to the support plate of the first support and a second end not supported by the support plate of the first support is provided at the outermost end of the first support, and a through hole is formed between at least two adjacent independent branches. In the second paragraph, A vacuum insulator having an independent branch including a first end fixed to the support plate of the first support and a second end not supported by the support plate of the first support provided at the outermost end of the first support, and a connecting branch connecting at least two adjacent independent branches, and a through hole formed between the independent branches and the connecting branch. In any one of paragraphs 3 and 4, A vacuum insulator wherein the support comprises a plurality of bars, and at least one of the independent branches and the connecting branches does not have the bar. In any one of paragraphs 3 and 4, A vacuum insulator wherein the above support comprises a plurality of bars, and at least one of the independent branches and the connecting branches has the bar or extension bar. In the second paragraph, A vacuum insulator wherein the outermost grid of the first support plate includes a portion smaller in size than the inner grid of the first support plate, or wherein the outermost grid of the second support plate includes a portion smaller in size than the inner grid of the second support plate. In paragraph 1, The above first support includes an inner support plate corresponding to the first plate and an outer support plate corresponding to the second plate, The above second support is a vacuum insulator including an inner support plate corresponding to the first plate and an outer support plate corresponding to the second plate. In Article 8, A vacuum insulator in which the inner support plate of the first support and the inner support plate of the second support are connected to each other, or the outer support plate of the first support and the outer support plate of the second support are connected to each other. In Article 8, A vacuum insulator in which the inner support plate of the first support and the inner support plate of the second support are connected to or supported by each other, and the outer support plate of the first support and the outer support plate of the second support are provided to be spaced apart from each other. In Article 8, A vacuum insulator in which the outer support plate of the first support and the outer support plate of the second support are connected to or supported by each other, and the inner support plate of the first support and the inner support plate of the second support are provided to be spaced apart from each other. In Article 8, A vacuum insulator wherein each of the inner support plate and the outer support plate of the first support is fastened to the outer support plate of the second support, or each of the inner support plate and the outer support plate of the second support is fastened to the inner support plate of the first support. In paragraph 1, The above support includes a plurality of bars including a portion extending in the height direction of the vacuum space; and a connecting plate including a portion connecting the plurality of bars. A vacuum insulator provided on the first support, which includes a portion that is fastened or supported on a connecting plate provided on the second support. In paragraph 1, A second extension bar provided at or near the end of the second support; and A vacuum insulator in which a fastening portion into which the second extension bar is fitted is provided on the first support. In Article 14, A third extension bar spaced apart from the second extension bar by a predetermined distance; and A vacuum insulator in which a fastening portion into which the third extension bar is fitted is provided on the first support or the second support. In Article 14, A first extension bar spaced apart from the second extension bar by a predetermined distance; and A vacuum insulator having a fastening portion into which the first extension bar is fitted, provided on the first support.

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