WO2024257912A1 - Vacuum adiabatic body - Google Patents

Abstract

The vacuum adiabatic body according to the present invention may comprise: 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.

Description

Vacuum insulator

The present invention relates to a vacuum insulator.

Insulation performance can be improved by forming an insulating wall using a vacuum. A device that forms at least a portion of the internal space using a vacuum and achieves an insulating 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, it does not disclose the relationship between the heat exchanger and other members inside the vacuum space, or the method of mounting the heat exchanger.

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 radiation resistance sheet that reduces radiation heat transfer through the vacuum space may be included. A heat exchanger mounted in the vacuum space may be included.

Optionally, the radiation resistance sheet may be provided as a single sheet. The single sheet may be formed with a removal portion through which the heat exchanger passes. The radiation resistance sheet may be provided as a plurality of sheets. At least two of the plurality of sheets may not be in contact with each other. At least two of the plurality of sheets may be placed on the same plane. The heat exchanger may be placed in a gap between at least two of the plurality of sheets. The heat exchanger may not be placed in a gap between at least two of the plurality of sheets. At least two of the radiation resistance sheets may be provided spaced apart in the height direction of the vacuum space. The at least two radiation resistance sheets may have the same or different boundary regions and removal portions in the height direction of the vacuum space.

Optionally, an anti-condensation mechanism may be provided on a second plate adjacent to a portion through which the heat exchanger passes. The anti-condensation mechanism may be an insulating material provided on an outer surface or an inner surface of the second plate. The anti-condensation mechanism may be a heater, a heat pipe, or a surface heating device provided on an outer surface or an inner surface of the second plate. The anti-condensation mechanism may be a heat diffusion plate provided on an outer surface or an inner surface of the second plate. The anti-condensation mechanism may be provided on a first stage of the heat exchanger adjacent to the evaporator. At least a portion of the heat exchanger may include a radiation shielding film surrounding the heat exchanger. A cross section of the radiation shielding film may be provided as a closed curve. The radiation shielding film may be provided as a resin layer and two reflective layers. The radiation shielding film may have a greater shielding effect on a contact portion of two refrigerant pipes forming the heat exchanger than on other portions. At least a portion of the radiation shield may be provided in a circular shape. At least a portion of the radiation shield may be provided in a shape corresponding to a shape of the heat exchanger. The radiation shield may be provided in a tube shape.

Optionally, a spacing member supported on the radiation resistance sheet may be included so that the radiation resistance sheet maintains a predetermined spacing in the thickness direction of the vacuum space. At least a part of the spacing member may be fitted to the radiation resistance sheet. The radiation resistance sheet may include a removal area where it is not provided. At least one of an insulating material and a radiation shielding film placed in the removal area may be included. A distance between at least one of the insulating material and the radiation shielding film and one of the first and second plates adjacent to the insulating material and the radiation shielding film may be shorter than a distance between at least one of the insulating material and the radiation shielding film and the heat exchanger. A spacing member supported on the radiation resistance sheet to maintain the spacing of the radiation resistance sheet is further included, and an end of the spacing member may be in contact with at least one of the insulating material and the radiation shielding film.

Optionally, a deformation portion formed in the radiation resistance sheet may be included so as to accommodate the heat exchanger. A radiation shielding film may be interposed between the deformation portion and the heat exchanger. The radiation shielding film may be a tube. The radiation resistance sheet may support the heat exchanger. A supporter for maintaining a gap between the vacuum space may be included. The supporter for maintaining a gap between the vacuum space is included, and the deformation portion may be in contact with the supporter. The support may include a support plate and a bar extending from the support plate toward the vacuum space. The distance from the deformation portion to the support plate may be shorter than the distance from the deformation portion to the heat exchanger. The radiation resistance sheet may include at least two radiation resistance sheets spaced apart from each other above and below the heat exchanger. Of the at least two radiation resistance sheets, at least one may not have the deformation portion. Of the at least two radiation resistance sheets, at least one may be open. The deformation portions of the at least two copy resistance sheets may be provided in a mirror shape with respect to each other. At least some of the deformation portions may be circular. At least some of the deformation portions may be provided flat. At least some of the deformation portions may not be in contact with the heat exchanger. The support may include a support plate and a bar extending from the support plate toward the vacuum space. The size of the deformation portion may be larger than the gap between adjacent bars.

Optionally, a gap block may be included between the radiation resistance sheet and the heat exchanger to separate at least a portion of the heat exchanger and the radiation resistance sheet. A radiation shielding film may be interposed between the heat exchanger and the gap block. At least one of a contact surface between the radiation resistance sheet and the gap block, a contact surface between the gap block and the heat exchanger, and a contact surface between the gap block and the radiation shielding film may be in line contact. At least one of a contact surface between the radiation resistance sheet and the gap block, a contact surface between the gap block and the heat exchanger, and a contact surface between the gap block and the radiation shielding film may be in point contact. A cross-sectional shape of the gap block may be a closed curve. A cross-sectional shape of the gap block may be an open curve. At least a portion of an outer shape of the gap block and an inner shape of the radiation resistance sheet may coincide.

Optionally, insulation may be provided adjacent to the heat exchanger. The insulation may be adjacent to at least one of the first and second plates rather than the heat exchanger. A deformation member may be provided for deforming the radiation resistance sheet so that the radiation resistance sheet approaches the plate.

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.

Fig. 8 is an example of how a support and a heat exchanger are installed.

Figure 9 is a drawing showing the relationship between the support, the heat exchanger, and the radiation resistance sheet.

Figure 10 is a drawing showing the relationship between a copy resistance sheet and a heat exchanger.

Figures 11 and 12 are drawings showing that the copy resistance sheet is provided in multiple sheets.

Figure 13 is a drawing showing at least two radiation resistance sheets arranged in the height direction of a vacuum space.

Figure 14 is a drawing showing a case where a dew prevention mechanism is provided on the outer surface of the second plate.

Figure 15 is a cross-sectional view of a heat exchanger provided with a radiation shield and a cross-sectional view of the radiation shield.

Fig. 16 is a cross-sectional view of a radiation shielding film according to an embodiment.

Figure 17 is a perspective view and an end view of a radiation shield.

Fig. 18 is a drawing illustrating a method of blocking heat transfer in a heat exchanger.

Figure 19 is a drawing of various embodiments for blocking radiant heat of a heat exchanger.

Fig. 20 is an example in which a gap block is placed between a copy resistance sheet and a heat exchanger.

Fig. 21 is a drawing of an embodiment in which insulation is provided.

Figure 22 is a drawing showing various embodiments of a copy resistance sheet.

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 be briefly illustrated with features. The embodiment should not be construed 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 supporter 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 above support may be provided in other parts. The above opening can be understood as a part of a device including a main body and a door capable of opening and closing the opening formed in the main body.

Examples of the support provided to support the plate are as follows. First, at least a part 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 part of the plurality of layers. The support may be

At least a portion of the plurality of layers may be provided to support the support. Secondly, at least a portion of the support may be provided to be connected to a surface formed on the exterior of the plate. The support may be provided in the vacuum space or an exterior space of the vacuum space. For 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 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 capable of 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 changes over time in order 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 a step of preparing the vacuum insulator component, a step of assembling the vacuum insulator component, and a step of assembling the device. 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 a drawing showing the relationship between the support, the heat exchanger, and the radiation resistance sheet. Fig. 10 is a drawing showing the relationship between the radiation resistance sheet and the heat exchanger. See Figs. 9 and 10.

The following may be optional. The support (30) may be provided as a first support (34a) on the upper side and a second support (34b) on the lower side. The first and second supports may be fastened. A radiation resistance sheet may be provided between the first and second supports. A hole through which a bar (31) passes may be provided in the radiation resistance sheet. The support may be provided by fastening a unit body (341). At least a portion of the radiation resistance sheet may be removed at a location where the heat exchanger passes. At least a portion of the radiation resistance sheet may not be removed at a location where the heat exchanger passes. The heat exchanger (57) and the radiation resistance sheet (32) may not be in contact. Through this, heat conduction may be reduced and the insulation effect may be increased. The radiation resistance sheet (32) may be provided as a single sheet. If there is no grid-type support, the heat exchanger can be placed after inserting the radiation resistance sheet. This is because the installation position of the heat exchanger is unknown. An example of a case without the grid-type support is a case where a porous material is present. If there is the grid-type support, the order of placement of the radiation resistance sheet and the heat exchanger may be unrelated. This is because the placement position of the heat exchanger can be known through the support.

FIGS. 11 and 12 are drawings showing that the copy resistance sheet is provided in multiple sheets. See FIGS. 11 and 12.

The above-described copy resistance sheet (32) may be provided as a plurality of sheets (32a to 32j). The following may be optional. The plurality of sheets may not be in direct contact with each other. The relative positions of the plurality of sheets may be fixed by a bar (31), etc. The plurality of sheets may be arranged on the same plane. A boundary area (349) may be provided between the plurality of sheets. The heat exchanger may be arranged in at least a part of the boundary area. The heat exchanger may not be arranged in at least a part of the boundary area. The boundary areas may be spaced apart by a predetermined interval (w). The heat conduction between the sheets may be shielded by the boundary area. The boundary area (349) may be provided in at least one of the horizontal direction and the vertical direction. At least two boundary areas (349) may be provided in both the horizontal direction and the vertical direction. The above boundary region (349) may have a width (w1) in the horizontal direction smaller than a width (w2) in the vertical direction. Through this, heat transfer in the horizontal direction can be further shielded. A portion of the boundary region where the heat exchanger is placed may have a large width. Through this, heat transfer between the heat exchanger and the radiation resistance sheet can be suppressed. A removal portion (341) may be provided on any one of the plurality of sheets. The removal portion (341) may be provided by cutting out any portion of the sheet. At least a portion of the heat exchanger may be placed on the removal portion. At least a portion of the plurality of sheets may be provided in a square shape.

Fig. 13 is a drawing showing at least two radiation resistance sheets arranged in the height direction of a vacuum space. See Fig. 13.

As shown in Fig. 13(a), the radiation resistance sheets can be arranged in the same manner in the height direction of the vacuum space. In other words, the plurality of sheets can be arranged to have the same boundary area (349) and/or removal area (341) even though they are different in layers. Accordingly, an area where heat radiation directly occurs can be generated through the first and second plates. The first and second supports can be provided to intersect each other.

As shown in Fig. 13(b), the radiation resistance sheets may be arranged in different aspects in the height direction of the vacuum space. In other words, the plurality of sheets may be arranged so that the boundary region (349) and/or the removal portion (341) are different when the layers are different. Accordingly, at least one radiation resistance sheet may be interposed between the first and second plates. Through this, the amount of thermal radiation transfer between the first and second plates may be reduced. Fig. 13(a) and Fig. 13(b) may be implemented together.

The discharge pipe (651) of the heat exchanger has a low temperature. The suction pipe (652) of the heat exchanger has a high temperature. The temperature difference of the heat exchanger may increase heat transfer with the outside. Condensation may occur on the plate adjacent to the discharge pipe. The condensation has a large effect in an area where the radiation resistance sheet is not provided. The condensation may be greatly observed in the boundary area and the removal section. An anti-condensation mechanism may be provided on the second plate (20) adjacent to the path along which the heat exchanger (57) proceeds. The following contents may be selectively applied. As the anti-condensation mechanism, at least one of an insulating material provided on the outer surface or inner surface of the second plate, a heater or a heat pipe or a surface heating device provided on the outer surface or inner surface of the second plate, and a heat diffusion plate provided on the outer surface or inner surface of the second plate may be applied. The above heat diffusion plate can rapidly diffuse the cold air from the discharge pipe along the extension direction of the second plate. Accordingly, the second plate can be prevented from dropping to a temperature below the dew point. The dew prevention mechanism can adjust its intensity according to the temperature of the discharge pipe. For example, the intensity of the heater can be increased as it gets closer to the first stage (65a) adjacent to the evaporator. The intensity of the heater can be decreased as it goes from the first stage to the second stage. The dew prevention mechanism can be operated only when the external humidity is high. Fig. 14 shows a case where the dew prevention mechanism (348) is provided on the outer surface of the second plate.

The discharge pipe (651) of the above heat exchanger has a low temperature. The suction pipe (652) of the above heat exchanger has a high temperature. The temperature difference of the above heat exchanger may increase heat transfer with the outside. This heat transfer is not desirable because it increases irreversibility. In the above heat exchanger (57), it is desirable to ensure that heat transfer occurs only in the heat exchanger. To this end, a radiation shield (571) may be installed on the outer periphery of the above heat exchanger.

Fig. 15 is a cross-sectional view of a heat exchanger provided with a radiation shield and a cross-sectional view of the radiation shield. Fig. 16 is a cross-sectional view of a radiation shield according to another embodiment. Fig. 17 is a perspective view and an end view of the radiation shield. See Figs. 15 to 17.

The following contents may be applied selectively. The radiation shielding film (571) may surround the heat exchanger (57) in a closed curve. At least a part of the radiation shielding film may be provided in a circular shape. At least a part of the radiation shielding film may be spaced apart from the heat exchanger. At least a part of the radiation shielding film may have an inner circumference shape corresponding to an outer circumference of the heat exchanger. The multiple shielding films may be provided as a tube. The radiation shielding film (571) may be provided in a configuration in which a resin layer (571b) and a reflection layer (571a) are laminated. The resin layer may be made of LLDPE (Linear low-density polyethylene). The resin layer may be provided in a structure in which aluminum is deposited on both sides. The reflection layer may be exemplified by a low-emissivity aluminum sheet, a nickel-plated sheet, and an aluminum-deposited sheet. The cold air of the heat exchanger and the warm air of the heat exchanger may not be radiated to the outside. The heat exchange efficiency of the above heat exchanger can be increased. The formation of condensation on the outer surface of the second plate can be prevented by the radiation shielding film. The radiation shielding film (571) can shield the contact portion of the two pipes. The radiation shielding film (571) can be closer to the contact portion of the two pipes. The radiation shielding film (571) can provide a greater radiation shielding effect at the contact portion of the two pipes. The radiation shielding film (571) can be provided at the contact portion of the two pipes. This is because heat radiation is large at the contact portion of the two pipes. The contact portion of the two pipes can be joined by brazing. The radiation resistance sheet may or may not be provided together with the multiple shielding films (571).

Fig. 18 specifically illustrates a method for blocking heat transfer of the heat exchanger. Fig. 18(a) illustrates an embodiment of adding a radiation shielding plate. Fig. 18(b) illustrates an embodiment of adding insulation. See Fig. 18.

A radiation shield (347) may be provided adjacent to the heat exchanger. The following may be applied selectively. The radiation shield may correspond to the boundary region (349) and/or the removal portion (341). The radiation shield (347) may be fixed at a position adjacent to the support plate (35). The radiation shield (347) may be provided on at least one of the first and second support plates. The left-right movement of the radiation shield may be stopped by the bar (31). The radiation shield may be stopped from moving up and down by a spacer (346). At least a portion of the spacer (346) may be fitted into the radiation resistance sheet (32). The spacer (346) may be supported by the radiation resistance sheet. The above spacing member (346) may not be supported by the bar (31). The spacing member (346) may be in contact with the radiation shielding film (347). The spacing member (346) may be extended in the vertical direction of the vacuum space. The spacing member (346) may prevent the radiation shielding film (347) and the radiation resistance sheet (32) from moving.

An insulation material (348) may be provided adjacent to the heat exchanger. The following may be applied selectively. The insulation material may correspond to the boundary region (349) and/or the removal portion (341). The boundary region (349) and the removal portion (341) may be referred to together as a removal region. The insulation material (348) may be fixed to a position adjacent to the support plate (35). The insulation material (348) may be provided in at least one of the first and second support plates. The insulation material may be provided in a location where there is no support plate. The insulation material may be provided in a gap between units forming the supporter. The insulation material may be in contact with the inner surface of any one of the first and second plates. The insulation material (348) and the radiation shielding film (347) may be applied together. The left-right movement of the insulation material may be stopped by the supporter (31). The distance between the above insulation and any one of the first and second plates (10)(20) adjacent to the insulation may be shorter than the distance between the insulation and the heat exchanger. Accordingly, the influence of radiant heat on the first and second plates may be reduced. At least one of the spacing member (346) and the bar (31) may be applied to fix the insulation. The insulation may use a material including PPS with less outgassing.

Fig. 19 shows various embodiments of blocking radiation heat of a heat exchanger. Fig. 19(a) shows a case with a radiation shield and a radiation resistance sheet. Figs. 19(b) and 19(c) show cases with a radiation resistance sheet. See Fig. 19.

A radiation shield (571) may be provided on the outside of the heat exchanger (57). The following may be applied selectively. The radiation shield (571) may surround the heat exchanger (57) in a closed curve. At least a portion of the radiation shield may be provided in a circular shape. At least a portion of the radiation shield may be spaced apart from the heat exchanger. The plurality of shields may be provided as a tube. The radiation shield (571) may be provided in a configuration in which a resin layer and a reflective layer are laminated. The resin layer may be made of LLDPE (Linear low-density polyethylene). The resin layer may be provided in a structure in which aluminum is deposited on both sides. The reflective layer may be exemplified by a low-emissivity aluminum sheet, a nickel-plated sheet, or an aluminum-deposited sheet. The cold air of the heat exchanger and the warm air of the heat exchanger may not be radiated to the outside except for heat exchange. The heat exchange efficiency of the heat exchanger may be increased. Condensation on the outer surface of the second plate can be prevented by the above-mentioned radiation shielding film.

A radiation resistance sheet (32) may be provided on the outside of the heat exchanger (57). The following may be applied selectively. The radiation resistance sheet (32) may be provided on at least one of the upper and lower sides of the heat exchanger. The radiation resistance sheet (32) may be provided in a form that accommodates the heat exchanger (57) therein. A deformation portion (32a)(32b) may be provided on the radiation resistance sheet (32). The deformation portion may accommodate the heat exchanger. At least a part of the deformation portion may not contact the heat exchanger. At least a part of the deformation portion may not contact the radiation shield. The distance between the deformation portion (32a) and the support plate (35) may be closer than the distance between the deformation portion and the heat exchanger. This allows radiation heat transfer to be reduced. For this purpose, when the above-mentioned copy resistance sheet is provided vertically, the deformation portion (32a)(32b) may be provided in a mirror shape. The distance (w) between the above-mentioned copy resistance sheet (32b) and the above-mentioned support plate may be longer than the distance between the above-mentioned copy resistance sheet and the heat exchanger. As a result, the copy resistance sheet may smoothly support the heat exchanger. The above-mentioned copy resistance sheet may support the heat exchanger. For this purpose, the above-mentioned copy resistance sheet may directly or indirectly contact the heat exchanger. The above-mentioned deformation portion may be provided flat.

At least one of the gap support between the at least two of the above-described radiation resistance sheets (32-1)(32-2), the gap support between the above-described radiation resistance sheets and the above-described support plate, and the above-described heat exchanger support function of the above-described radiation resistance sheet can be smoothly performed. To this end, the above-described radiation resistance sheet can be supported on a bar. A gap block (311) can be provided on the bar. The gap block can be fitted to the bar as a separate member. At least one end of the gap block can contact the radiation resistance sheet. A protrusion (312) can be provided on the bar (31). At least one end of the protrusion can contact the radiation resistance sheet. The gap block and the protrusion can prevent the radiation resistance sheet from moving in the thickness direction of the vacuum space. The above-described deformation portion (32a)(32b) can contact the above-described support plate (35). The above-described deformation portion can be provided flat. Through this, the above-mentioned radiation resistance sheet can be supported over a wide area. The above-mentioned radiation resistance sheet can be supported more stably.

Fig. 20 shows a case where a gap block is placed between a copy resistance sheet and a heat exchanger. Fig. 20(a) shows a case where the gap block is generally circular. Fig. 20(b) shows a case where the gap block is generally rectangular. See Fig. 20.

At least a portion between the radiation resistance sheet and the heat exchanger can be spaced apart from each other. The following may be applied selectively. The entire space between the radiation resistance sheet and the heat exchanger can be spaced apart. The gap between the radiation resistance sheet and the heat exchanger can be supported by a gap block. The gap block (313)(314) can use a material having low outgassing. The gap block can use ceramic or resin. The resin can use PPS. The gap block can prevent direct contact between the heat exchanger and the radiation resistance sheet. The gap block can use a material having high insulation performance. A radiation shielding film (571) can be interposed between the heat exchanger and the gap block. It is preferable that the areas of the contact surface between the radiation resistance sheet and the gap block, the contact surface between the gap block and the heat exchanger, and the contact surface between the gap block and the radiation shielding film are small. At least one of the contact surface between the above-mentioned radiation resistance sheet and the gap block, the contact surface between the gap block and the heat exchanger, and the contact surface between the gap block and the radiation shielding film may have a rib or the like intervened to form a line contact. At least one of the contact surface between the above-mentioned radiation resistance sheet and the gap block, the contact surface between the gap block and the heat exchanger, and the contact surface between the gap block and the radiation shielding film may have a protrusion or the like intervened to form a point contact. The gap block may be provided in a cross-sectional shape of a closed curve. Through this, the insulation performance may be improved. The gap block may be provided in a cross-sectional shape of an open curve. The gap block (341) may be provided with a mouth (315). Through this, the heat exchanger may be easily inserted into the gap block. At least a portion of the outer shape of the gap block and the inner shape of the deformation portion may coincide. Through this, the gap block may be easily positioned.

Fig. 21 is a drawing explaining a case where insulation is provided. Fig. 21(a) shows a case where only insulation is provided. Fig. 21(b) shows a case where insulation and a deformation part are provided. See Fig. 21.

An insulation (347) may be provided adjacent to the heat exchanger. The following may be applied selectively. The insulation (347) may be fixed at a position adjacent to the support plate (35). The insulation (347) may be in contact with at least one of the first and second support plates. The insulation (347) may be closer to the plate (10) (20) than the heat exchanger. The insulation may be provided at a location where there is no support plate. The insulation may be provided in a gap between units forming the supporter. The insulation may be in contact with an inner surface of any one of the first and second plates. The distance between the insulation and any one of the first and second plates (10) (20) adjacent to the insulation may be shorter than the distance between the insulation and the heat exchanger. Accordingly, the influence of radiant heat on the first and second plates may be reduced. The above insulation may use a material including PPS with low outgassing. The lengths of the removal portions where the radiation resistance sheets are removed in at least two of the above radiation resistance sheets (32-1)(32-2) may be different from each other. The cut length of the first radiation resistance sheet (32-1) may be shorter than the cut length of the second radiation resistance sheet (32-2). The heat exchanger may be closer to the second radiation resistance sheet (32-2). This is because the degree of interference with the heat exchanger may be different for each radiation resistance sheet. The above deformation portion (32a)(32b) may be further provided. The deformation portion may be closer to the plate than to the heat exchanger. The radiation heat may be more strictly blocked by the deformation portion.

Fig. 22 is a drawing showing various embodiments of a copy resistance sheet. Fig. 22(a) shows a case where a relatively large deformation portion is provided. Fig. 22(b) shows a case where a deformation portion is formed only on one side. Fig. 22(c) shows a case where only one side of the copy resistance sheet is opened. See Fig. 22.

The following items can be applied selectively. The width of the deformation portion (32a)(32b) can be provided to be greater than one time the spacing between the bars (31). The width of the deformation portion (32a)(32b) can be provided to be greater than two times the spacing between the bars (31). As the deformation portion becomes larger, the shape of the deformation portion can be easily processed. The processing method can apply a press. As the deformation portion becomes larger, the deformation strength of the radiation resistance sheet can be increased. As the deformation portion becomes larger, the strong deformation portion can be formed more easily. The deformation portion can be provided in at least one of the at least two radiation resistance sheets (32-1)(32-2). Accordingly, the concern about heat conduction that may occur when the deformation portion comes into contact with the support plate or the first and second plates can be reduced. The deformation portion (32b) can be provided only when necessary for supporting a heat exchanger, etc. An opening (341)(349) may be provided in at least one of the at least two radiation resistance sheets (32-1)(32-2). The opening may be provided at a location where the heat exchanger and the radiation resistance sheet interfere. Accordingly, an increase in the amount of radiation heat transfer between the heat exchanger and the first and second plates may be prevented. The opening may include a gap (341) of the sheet itself, or a portion (349) where the sheet is cut.

According to the present invention, a heat exchanger can be conveniently installed inside a vacuum space.

Claims (17)

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; A heat transfer resistor provided in at least one of the spaces within the vacuum space and adjacent to the first and second plates to reduce heat transfer between the first plate and the second plate; and A vacuum insulator including a tube having a portion disposed in the above vacuum space. In paragraph 1, The above heat transfer resistor is a vacuum insulation body including a radiation shield formed to surround at least a portion of the tube. In the second paragraph, The cross-section of the above radiation shield is provided as a vacuum insulation material in the form of a closed curve. In the second paragraph, The above-mentioned radiation shielding film is a vacuum insulation body provided with a resin layer and two reflective layers. In the second paragraph, The above-mentioned radiation shielding film is a vacuum insulator including a portion in contact with the tube. In paragraph 1, The above heat transfer resistor is a vacuum insulator including a radiation resistance sheet having a void or removal portion for providing a space in which at least a portion of the tube is placed. In paragraph 1, The above heat transfer resistor includes a first heat transfer resistor and a second heat transfer resistor provided spaced apart from the first heat transfer resistor, The above tube is a vacuum insulator including a first heat transfer resistor and a portion disposed in a void space formed spaced apart from the first heat transfer resistor. In paragraph 1, The above heat transfer resistor is a vacuum insulator including a radiation resistance sheet having a portion provided so as not to come into contact with the tube. In paragraph 1, A vacuum insulator in which the heat transfer resistor includes a radiation resistance sheet that reduces radiation heat transfer between the first plate and the second plate, and in a removal area where the radiation resistance sheet is not provided, at least one of an insulating material and a radiation shielding film is arranged. In Article 9, A vacuum insulator, wherein the distance between at least one of the insulating material and the radiation shielding film and one of the first and second plates adjacent to the insulating material and the radiation shielding film is shorter than the distance between at least one of the insulating material and the radiation shielding film and the tube. In Article 9, A vacuum insulator further comprising a spacing member that is supported by the above-mentioned radiation resistance sheet and maintains the spacing of the above-mentioned radiation resistance sheets, and at least one of the above-mentioned insulating material and the above-mentioned radiation shielding film is in contact with an end of the spacing member. In paragraph 1, The above heat transfer resistor includes a radiation resistance sheet that reduces radiation heat transfer between the first plate and the second plate, and further includes a space-maintaining member supported on the radiation resistance sheet to maintain a predetermined space in the thickness direction or height direction of the vacuum space, and a vacuum insulator wherein at least a portion of the space-maintaining member is fitted into the radiation resistance sheet. In paragraph 1, A vacuum insulator comprising a radiation resistance sheet for reducing radiation heat transfer between the first plate and the second plate, and a deformation portion formed in the radiation resistance sheet so as to accommodate the tube. In Article 13, A vacuum insulator including a supporter that maintains the gap of the above vacuum space, and the deformation part is in contact with the supporter. In Article 13, A supporter is included to maintain the gap of the above vacuum space, and the support includes a support plate and a bar extending from the support plate toward the vacuum space. A vacuum insulator in which the distance between the above-mentioned deformation part and the above-mentioned support plate is shorter than the distance between the above-mentioned deformation part and the above-mentioned pipe. In Article 13, The above-mentioned radiation resistance sheet includes at least two radiation resistance sheets spaced apart from each other above and below the tube, A vacuum insulator, wherein among the at least two radiation resistance sheets, at least one has no deformation portion, or among the at least two radiation resistance sheets, at least one is open. In paragraph 1, A vacuum insulator comprising a radiation resistance sheet for reducing radiation heat transfer between the first plate and the second plate, and a gap block provided between the radiation resistance sheet and the tube to separate at least a portion of the tube and the radiation resistance sheet.

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