KR20220059359A - Vacuum adiabatic body and fabrication method for the same - Google Patents

Abstract

A vacuum adiabatic body of the present invention can include: a first plate; a second plate; and a sealing part sealing the first and second plates to provide a vacuum space part. Optionally, the vacuum adiabatic body can include a supporter for maintaining the vacuum space part. Optionally, the vacuum adiabatic body can include a thermal insulator for reducing a heat transfer quantity between the first plate and the second plate. Optionally, the vacuum adiabatic body can include a component coupling part connected with at least one of the first and second plates to be combined with a component. Optionally, at least some of a plurality of curve parts provided by the second plate and a side plate can have the smallest thickness value among the second plate and the side plate. Accordingly, an adiabatic effect can be enhanced.

Description

A vacuum insulator and a method of manufacturing a vacuum insulator {Vacuum adiabatic body and fabrication method for the same}

The present invention relates to a vacuum insulator and a method for manufacturing a vacuum insulator.

The insulation performance can be improved by constructing an insulation wall with vacuum. At least a part of the inner space is made of vacuum, and a device for forming a thermal insulation effect may be referred to as 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 the vacuum insulator of Republic of Korea Application Nos. 10-2015-0109724 and 10-2015-0109722.

In the cited document, a plurality of members are fastened to provide a vacuum space portion. Specifically, the first plate, the conductive resistance sheet, the side plate, and the second plate are sealed to each other. In order to seal the fastening portion of each member, a sealing process is performed. A small process error occurring in the sealing process leads to vacuum breakage.

The above cited document does not disclose a specific method for insulating the periphery of the vacuum insulator. In particular, a method for manufacturing the vacuum insulator is not described.

Republic of Korea Application No. 10-2015-0109724, vacuum insulator Republic of Korea Application No. 10-2015-0109722, vacuum insulator

The present invention is to solve the above problems, and proposes a vacuum insulator that can solve the problem of sealing defects between members providing a vacuum space portion.

The present invention proposes a vacuum insulator that reduces the manufacturing cost required for manufacturing the vacuum insulator and improves productivity.

The present invention proposes a vacuum insulator capable of maintaining vacuum pressure for a long time without damage even when vacuum pressure is applied.

The present invention proposes a vacuum insulator capable of improving thermal insulation performance by reducing heat conduction along the outer wall of the vacuum insulator.

The present invention, in particular, proposes a vacuum insulator that prevents leakage of a vacuum space portion by ensuring that the member is in perfect contact with the laser welding to form a vacuum pressure.

The vacuum insulator of the present invention, the first plate; second plate; It may include a sealing part sealing the first plate and the second plate to provide a vacuum space part. Optionally, it may include a supporter for maintaining the vacuum space. Optionally, a heat transfer resistor for reducing the amount of heat transfer between the first plate and the second plate may be included. Optionally, it may include a part fastening part connected to at least one of the first and second plates to which the parts are coupled. Accordingly, it is possible to provide a vacuum insulator that can achieve the industrial purpose.

Optionally, it may include a vacuum insulator component preparation step in which the parts forming the vacuum insulator are prepared in advance. Optionally, it may include a vacuum insulator component assembly step in which the prepared components are assembled. Optionally, it may be manufactured by a vacuum evacuation step of a vacuum insulator in which the gas of the vacuum space is discharged after the component assembly step. Optionally, when the vacuum insulator component preparation step is performed, at least some of the plurality of curved portions may be thinner than the base material. Accordingly, the manufacturing process of the vacuum insulator can be facilitated.

According to the present invention, since the second plate and the side plate are provided as one body, sealing is not required at the interface between the two plates. According to this, the locations where leakage may occur are reduced, and consequently, product reliability is improved.

According to the present invention, since two members are used as a single member and the two members can be provided together through a single processing process, it is possible to achieve reduction in manufacturing cost and improvement in productivity.

According to the present invention, there is no risk of leakage, and since the cross section of the single body is provided in a number of curves and straight lines, it is possible to resist deformation due to vacuum pressure.

In the present invention, at least a portion of the first plate may be a conductive resistance sheet itself. Accordingly, it is possible to sufficiently resist cold conduction and improve thermal insulation performance.

The present invention can reduce sealing defects by providing a structure of a curved portion that ensures close contact between the two members when the side plate and the first plate are sealed.

1 is a perspective view of a refrigerator according to an embodiment;
2 is a view schematically showing a vacuum insulator used for a main body and a door of a refrigerator;
3 is a view showing an embodiment of a support for holding a vacuum space portion.
4 is a view for explaining an embodiment of a vacuum insulator centering on a heat transfer resistor.
5 is a graph for observing the process of evacuating the inside of the vacuum insulator with time and pressure when a support is used.
6 is a graph comparing vacuum pressure and gas conductivity.
7 is a view showing various embodiments of a vacuum space unit.
Fig. 8 is a view for explaining an additional thermal insulator;
9 is a view for explaining a heat transfer path between first and second plates having different temperatures.
10 is a view for explaining a branch on a heat transfer path between first and second plates having different temperatures;
11 is a view for explaining a method of manufacturing a vacuum insulator.
12 is a perspective view of a second plate;
13 is a front view and a cross-sectional view of a second plate;
Fig. 14 is an enlarged view of a corner portion of a second plate;
15 is a view showing an embodiment of manufacturing a second plate.
16 and 17 are views showing another embodiment of manufacturing the single body.
18 to 27 are views for explaining a method of manufacturing a vacuum insulator.
28 is a partial sectional perspective view of the first vacuum insulator;
Fig. 29 is a partial front view of the cross-sectional view of Fig. 28;
30 is a partial cross-sectional view of a single body;
Fig. 31 is a reference view for explaining the curvature of each member of the vacuum insulator of the embodiment;

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 may add other embodiments included within the scope of the same spirit to components or components, Changes, deletions, and additions may be easily suggested, but this will also be included within the scope of the present invention. The present invention may have many embodiments in which the idea is implemented, and in each embodiment, any part may be replaced with a corresponding part or a part having a related action in another embodiment. The present invention may be any one of the examples presented below or an example in which two or more are combined.

The present invention, the first plate; second plate; a vacuum space formed between the first and second plates; It may be a vacuum adiabatic body including a seal for providing the vacuum space (vacuum space). The vacuum space part may be a space in a vacuum state provided in the inner space between the first plate and the second plate. The sealing part may seal the first plate and the second plate to provide an 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 a portion of the first and second plates and the side plate may be integrally formed, or at least a portion may be sealed with each other. Optionally, the vacuum insulator may include a support for maintaining the vacuum space portion. The vacuum insulator selectively reduces the amount of heat transfer between the first space provided in the vicinity of the first plate and the second space provided in the vicinity of the second plate, or between the first plate and the second plate. A thermal insulator may be included to reduce the amount of heat transfer. Optionally, the vacuum insulator may include a fastening part formed on at least a portion of the plate. Optionally, the vacuum insulator may include another adiabatic body. The additional insulator may be provided to be connected to the vacuum insulator. The additional heat insulator may be a heat insulator having the same or a different degree of vacuum as the vacuum insulator. The additional heat insulator may be a heat insulator that does not include a vacuum level or lower than that of the vacuum insulator or a part in a vacuum state therein. In this case, it may be advantageous to connect another object to the additional thermal insulator.

In the present invention, the direction along the wall defining the vacuum space may include a longitudinal direction of the vacuum space and a height direction of the vacuum space. A height direction of the vacuum space portion may be defined as any one direction among virtual lines connecting a first space and a second space to be described later while penetrating the vacuum space portion. The longitudinal direction of the vacuum space portion may be defined as a direction perpendicular to the set height direction of the vacuum space portion. In the present invention, that the object A is connected to the object B means that at least a part of the object A and at least a part of the object B are directly connected, or at least a part of the object A and at least a part of the object B are connected to the objects A and B It can be defined as being connected through an intermediate. The medium may be provided to at least one of object A and object B. The connection may include that the object A is connected to the medium, and the medium is connected to the object B. A part of the medium may include a part connected to either one of object A and object B. The other part of the medium may include a part connected to the other of the object A and the object B. As a variant, the connection of the object A to the object B may include that the object A and the object B are integrally prepared in a shape connected in the above-described manner. In the present invention, an embodiment of the connection may be a support, a combination, or a seal, which will be described later. In the present invention, that object A is supported by object B means that object A is supported by object B in one or more of +X, -X, +Y, -Y, +Z, and -Z axis directions. It can be defined that movement is restricted. In the present invention, an embodiment of the support may be a coupling or sealing, which will be described later. In the present invention, that the object A is coupled to the object B may define that the object A is restricted from moving by the object B in one or more of the X, Y, and Z-axis directions. In the present invention, an embodiment of the coupling may be a sealing to be described later. In the present invention, that the object A is sealed to the object B may define a state in which the movement of the fluid is not allowed in the portion where the object A and the object B are connected. In the present invention, one or more objects, i.e., object A and at least a portion of object B, include a portion of object A, all of object A, a portion of object B, all of object B, a portion of object A and a portion of object B; It can be defined as including part of object A and all of object B, all of object A and part of object B, and all of object A and all of object B. In the present invention, that the plate A may be a wall defining the space A may be defined as that at least a part of the plate A may be a wall defining at least a part of the space A. That is, at least a part of the plate A may be a wall forming the space A, or the plate A may be a wall forming at least a part of the space A. In the present invention, when the object is divided into three equal parts based on the longitudinal direction of the object, the central portion of the object may be defined as a central portion among the three divided portions. The peripheral portion of the object may be defined as a portion located to the left or right of the central portion among the three divided portions. The peripheral portion of the object may include a surface in contact with the central portion and a surface opposite thereto. The opposite side may be defined as a border or edge of the object. Examples of the object may be a vacuum insulator, a plate, a heat transfer resistor, a support, a vacuum space, and various parts to be introduced in the present invention. In the present invention, the degree of heat transfer resistance (Degree of 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. can The heat transfer resistance may be defined as the sum of a degree of conduction resistance, a degree of radiation resistance, and a degree of convection resistance. It may include a heat transfer path formed between spaces with different temperatures, or a heat transfer path formed between plates having different temperatures.For example, the vacuum insulator of the present invention provides It may include a heat transfer path through which cold is transferred toward the high plate In the present invention, the curved portion includes a first portion in which the object extends in a first direction and a second portion in which the object is different from the first direction. When a second portion extending in the direction is included, it may be defined as a portion connecting the first portion and the second portion (including 90 degrees).

In the present invention, the vacuum insulator may optionally include a fastening part. The part fastening part may be defined as a part provided on the plate to which parts are connected. The part connected to the plate may be defined as a penetrating part disposed to penetrate at least a part of the plate and a surface part disposed to be connected to the surface of at least a part of the plate. At least one of a penetrating part and a surface part may be connected to the part fastening part. The penetrating part may be a part that mainly forms a path through which a fluid (electricity, refrigerant, water, air, etc.) passes. In the present invention, a fluid is defined as any kind of flowing body. The fluid includes moving solids, liquids and gases and electricity. For example, the component may be a component that forms a path through which a refrigerant for heat exchange passes, such as a Suction Line Heat Exchanger (SLHX) or a refrigerant pipe. The component may be a wire that supplies electricity to the device (Apparatus). As another example, the component may be a component that forms a path through which air can pass, such as a cold air duct, a hot air duct, and an exhaust port. As another example, the component may be a path through which a fluid such as coolant, hot water, ice, and defrost water may pass. The surface parts include peripheral insulation, side panels, foam injected, pre-prepared resin, hinges, latches, baskets, drawers, shelves, lights, sensors, evaporators, front decorations, and hotlines, heaters, exterior covers, additional insulation may include at least one of

As an example to which the vacuum insulator is applied, the present invention may include an apparatus having the vacuum insulator. An example of the device is an appliance. As an example of the appliance, a home appliance including a refrigerator, a cooking appliance, a washing machine, a dishwasher, and an air conditioner, etc. can be heard As an example in which the vacuum insulator is applied to a device, the vacuum insulator may form at least a portion of a body and a door of the device. As an example of the door, the vacuum insulator may form at least a portion of a general door and a door-in-door (DID) in direct contact with the body. Here, the door-in-door may mean a small door placed inside the general door. As another example to which the vacuum insulator is applied, 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 described in detail with reference to the drawings. Each drawing accompanying the embodiment may be different from, exaggerated, or simply indicated from the actual article, and detailed parts may be briefly indicated with features. The embodiment should not be interpreted as being limited only to the size, structure, and shape presented in the drawings. In the embodiments accompanying each drawing, some configurations of the drawings of one embodiment may be applied to some configurations of the drawings of other embodiments, and some structures of certain embodiments may be applied to some structures of other embodiments, provided that the descriptions do not conflict with each other. can In the description of the drawings for the embodiment, the same reference numerals may be assigned to different drawings as reference numerals of specific components constituting the embodiment. Components having the same reference number may perform the same function. For example, the first plate constituting the vacuum insulator has a portion corresponding to the first space throughout all embodiments, and is indicated by reference numeral 10. 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 be different in each embodiment. Not only the first plate, but also the side plate, the second plate, and an additional thermal insulator can be understood as well.

1 is a perspective view of a refrigerator according to an embodiment, and FIG. 2 is a diagram schematically illustrating a vacuum insulator used for a main body and a door of the refrigerator. Referring to FIG. 1 , a refrigerator 1 includes a main body 2 provided with a cavity 9 for storing stored items, and a door 3 provided to open and close the main body 2 . The door 3 is rotatably or slidably disposed to open and close the cavity 9 . The cavity 9 may provide at least one of a refrigerating compartment and a freezing compartment. A cold source for supplying cold air to the cavity may be provided. For example, the cooling source may be an evaporator 7 that evaporates a refrigerant to take heat. The evaporator 7 may be connected to a compressor 4 that compresses the refrigerant evaporated to the cooling source. The evaporator 7 may be connected to a condenser 5 condensing the compressed refrigerant to the cooling source. The evaporator 7 may be connected to an expander 6 that expands the refrigerant condensed in the cooling source. A fan corresponding to the evaporator and the condenser may be provided to promote heat exchange. As another example, the cooling source may be a heat absorbing surface of the thermoelectric element. A heat absorbing sink may be connected to the heat absorbing surface of the thermoelectric element. A heat sink may be connected to a heat radiation 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 , and 20 may be walls defining the vacuum space. The plate may be a wall dividing the vacuum space and an external space of the vacuum space. An example of the plate is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The plate may be provided as one part or may be provided to include at least two parts connected to each other. As a first example, the plate may include at least two parts connected to each other in a direction along a wall defining the vacuum space. Any one of the two parts may include a part (eg, the first part) forming the vacuum space part. The first part may be a single part or may include at least two parts that are sealed to each other. The other one of the two parts may include a part (eg, a second part) extending from the first part of the first plate in a direction away from the vacuum space part or extending in an inner direction of the vacuum space part. . As a second example, the plate may include at least two layers connected to each other in a thickness direction of the plate. Any one of the two layers may include a layer (eg, the first portion) forming the vacuum space portion. The other one of the two layers may include a portion (eg, a second portion) provided in an external space (eg, the first space and the second space) of the vacuum space unit. In this case, the second part may be defined as an outer cover of the plate. The other one of the two layers may include a portion (eg, a second portion) provided in the vacuum space portion. In this case, the second part may be defined as an inner cover of the plate.

The plate may include a first plate 10 and a second plate 20 . One surface of the first plate (“the inner surface of the first plate”) provides a wall defining the vacuum space portion, and the other surface of the first plate (“the outer surface of the first plate”) defines the first space wall can be provided. The first space may be a space provided in the vicinity of 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 the additional member form the inner 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 (“the inner surface of the second plate”) provides a wall defining the vacuum space, and the other surface of the second plate (“the outer surface of the second plate”) defines the second space. wall can be provided. 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 the additional member form the outer 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 , the side plate may also perform a function of the conductive resistance sheet 60 to be described later, depending on the location of the side plate. The side plate may include a portion extending in the height direction of the space formed between the first plate and the second plate, or may include a portion extending in the height direction of the vacuum space portion. One surface of the side plate may provide a wall defining the vacuum space portion, and the other surface of the side plate may provide a wall defining an external space of the vacuum space portion. The outer space of the vacuum space part may be at least one of the first space and the second space, or a space in which an additional heat insulating material to be described later is disposed. The side plate may be integrally formed by extending at least one of the first plate and the second plate, or may be a separate component connected to at least one of the first plate and the second plate.

The plate may optionally include curved portions. In the present invention, a plate including a curved portion may be referred to as a bent plate. The curved portion may include 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. can be provided on The plate may include at least one of a first curved portion and a second curved portion, an example of which is 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 part of the first curved part may include a part connected to the second curved part. In this case, the radius of curvature of the first curved portion and the second curved portion may be large. Another portion of the first curved portion may be connected to an additional straight line portion or an additional curved portion provided between the first curved portion and the second curved portion. In this case, the curvature radius of the first curved portion and the second curved portion may be small. Second, the side plate may include the second curved part. 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 radius of curvature of the first curved portion and the second curved portion may be large. Another portion of the second curved portion may be connected to an additional straight line portion or an additional curved portion provided between the first curved portion and the second curved portion. In this case, the curvature radius of the first curved portion and the second curved portion may be small. Here, the straight portion may be defined as a portion having a greater radius of curvature than the curved portion. The straight part may be understood as a part having a greater radius of curvature than a perfect plane or curved part. 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. A portion connected to the side plate may be provided at a position away from the second plate in a portion in which the first plate extends in the longitudinal direction of the vacuum space portion. 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. A portion connected to the side plate may be provided at a position away from the first plate in a portion in which the second plate extends in the longitudinal direction of the vacuum space portion. 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 may be defined as a third space. The vacuum space may be a space in which vacuum pressure is maintained. In the present invention, the expression that A has a higher degree of vacuum than B means that the vacuum pressure of A is lower than that of B.

In the present invention, the sealing part 61 may be a portion provided between the first plate and the second plate. Examples of sealing are as follows. The present invention may be any one of the following examples, or a combination of two or more. The sealing may include fusion welding for joining the plurality of objects by melting at least a portion of the plurality of objects. For example, the first plate and the second plate are fused by laser welding or the like in a state where a medium is not interposed, or a medium such as a filler metal is interposed between a part of the first and second plates and a part of the part fastening part. It may be fused by high-frequency brazing or the like in the finished state, or fused by a medium (eg, a melting bond) in which the plurality of objects generate heat. The sealing may include pressure welding for joining the plurality of objects by mechanical pressure applied to at least a portion of the plurality of objects. For example, as a part connected to the part fastening part, an object made of a material having a lower degree of deformation resistance than the plate may be press-contacted by a method such as a pinch-off method.

A machine room 8 may be optionally provided on the outside of the vacuum insulator. The machine room may be defined as a space in which parts connected to the cooling source are accommodated. Optionally, the vacuum insulator may include a tube 40 . The tube may be provided on either side of the vacuum insulator to exhaust the air of the vacuum space unit 50 . Optionally, the vacuum insulator may include a conduit 64 penetrating the vacuum space 50 for installation of parts connected to the first space and the second space. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

3 is a view showing an embodiment of a support for maintaining the vacuum space portion. An example of the support is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The supports 30 , 31 , 33 , and 35 are provided among the plate and a heat transfer resistor to be described later so as to reduce deformation of at least some of the vacuum space 50 , the plate, and a heat transfer resistor to be described later by an external force. It may be provided to support at least a portion. The external force includes at least one of a vacuum pressure and an external force excluding the vacuum pressure. When the deformation occurs in a direction in which the height of the vacuum space portion decreases, the support may reduce an increase in at least one of radiant heat conduction, gas heat conduction, surface heat conduction, and supporter heat conduction, which will be described later. The support may be an object provided to maintain a gap between the first plate and the second plate, or an object provided to support the heat transfer resistor. The support has a greater degree of strain resistance than the plate, or is provided in a portion having a weak degree of strain resistance among parts constituting the vacuum insulator, the device having the vacuum insulator, and the wall having the vacuum insulator. can In the present invention, the degree of deformation resistance indicates the degree to which an object resists deformation due to an external force applied to the object, and the shape including the thickness of the object, the material of the object, and the processing method of the object It can be defined as a value determined by Examples of the portion in which the strain resistance is weak may be a vicinity of a curved portion formed by the plate or at least a portion of the curved portion, a vicinity of an opening formed in a body of a device provided by the plate, or at least a portion of the opening. The support may be disposed to surround at least a portion of the curved portion or the opening or may be provided to correspond to the shape of the curved portion or the opening, but the support is not excluded from being provided on other portions. The opening may be understood as a part of a device including a body and a door capable of opening and closing the opening formed in the body.

An example in which the support is provided to support the plate is as follows. First, at least a portion of the support may be provided in a space formed inside the plate. The plate may include a portion having a plurality of layers, and the support may be provided between the plurality of layers. Optionally, the support may be provided to connect with at least a portion of the plurality of layers or provided to support at least a portion of the plurality of layers. Second, at least a portion of the support may be provided to be connected to a surface formed on the outside of the plate. The support may be provided in the vacuum space part or in an external space of the vacuum space part. For example, the plate may include a plurality of layers, and the support may be provided in any one of the plurality of layers. Optionally, the support may be provided to support the other one of the plurality of layers. As another example, the plate may include a plurality of portions extending in the longitudinal direction, and the support may be provided by any one of the plurality of portions. Optionally, the support may be provided to support the other one of the plurality of parts. As another example, the support may be provided in the vacuum space part or an external space of the vacuum space part as a separate part from the plate. 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, and one surface of the first plate and one surface of the second plate may be provided to face each other. Third, the support may be provided integrally with the plate. An example in which the support is provided to support the heat transfer resistor may be understood instead of an example in which the support is provided to support the plate. A duplicate description will be omitted.

An example in which the support is designed to reduce heat transfer through the support is as follows. First, at least a portion of the parts disposed in the vicinity of the support may be provided so as not to come into contact with the support or may be provided to be disposed in an empty space provided by the support. Examples of the component include a heat transfer resistor, exhaust port, getter port, which will be described later, a tube or component connected to the plate, a tube or component passing through the vacuum space, a tube or component at least a part of which is disposed in the vacuum space, etc. can be Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. Examples of the empty space may be 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 separated from the support. Optionally, at least a portion of the component may be disposed in a through hole formed in the support, disposed between a plurality of bars, disposed between a plurality of connecting plates, or disposed between a plurality of support plates. Optionally, at least a portion of the component may be disposed in a space spaced apart between the plurality of bars, in a space spaced apart between the plurality of connection plates, or in a space spaced apart between the plurality of support plates. Second, insulation may be provided on at least a portion of the support or in the vicinity of at least a portion of the support. The insulating material may be provided to be in contact with the support or provided not to be in contact with the support. The heat insulating material may be provided at a portion in which the support and the plate are in contact. The heat insulating material may be provided on at least a portion of one surface and the other surface of the support, or may be provided to cover at least a portion of one surface and the other surface of the support. The insulating material may be provided on at least a portion of the vicinity of one surface of the support and the vicinity of the other surface of the support, or may be provided to cover at least a portion of the vicinity of one surface of the support and the vicinity of the other surface of the support. The support may include a plurality of bars, and an insulating material may be disposed in a region from a point where any one of the plurality of bars is located to a midpoint between the one bar and surrounding bars. Third, when cold air is transmitted through the support, a heat source may be disposed at a location where the heat insulator described in the second example is disposed. When the temperature of the first space is lower than the temperature of the second space, the heat source may be disposed on the second plate or in the vicinity of the second plate. When heat is transmitted through the support, a cold source may be disposed at a location where the heat insulator described in the second example is disposed. When the temperature of the first space is higher than the temperature of the second space, the cooling source may be disposed on the second plate or in the vicinity of the second plate. As a fourth example, the support may include a portion having a higher heat transfer resistance than a metal or a higher heat transfer resistance than the plate. The support may include a portion having a lower heat transfer resistance than an additional adiabatic body. The support may include at least one of a non-metal material, PPS and glass fiber (GF), low outgassing PC, PPS, and LCP. The reason is that it is possible to obtain high compressive strength, low outgassing and water absorption rates, low thermal conductivity, high compressive strength at high temperatures, and excellent workability.

Examples of the support may be the bars 30 and 31 , the connection plate 35 , the support plate 35 , the porous material 33 , and the 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 bars 30 and 31 that extend in a direction connecting the first plate and the second plate in order to support a gap between the first plate and the second plate. It may contain parts. The bar may include a portion extending in the height direction of the vacuum space portion or may include a portion extending in a direction substantially perpendicular to the direction in which the plate extends. The bar may be provided to support only one of the first plate and the second plate, or 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, and 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, and the other surface of the bar may be provided to support another portion of the plate. The support includes a bar provided with an empty space therein, the support includes a plurality of bars and an empty space is provided between the plurality of bars, or the support includes a bar and the bar is provided separately from the bars It may be arranged to provide an empty space between the separate parts. The support may optionally include a connecting plate 35 including a portion connected to the bar or a portion connecting a plurality of bars. The connecting plate may include a portion extending in the longitudinal direction of the vacuum space portion or may include a portion extending along the extending direction of the plate. An XZ-plane cross-sectional area of the connecting plate may be greater 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 one surface and the other surface of the bar may be a surface on which the bar supports the plate. The shape of the connecting plate is not limited. The support includes a connection plate provided with an empty space therein, the support includes a plurality of connection plates and an empty space is provided between the plurality of connection plates, or the support includes a connection plate and the connection The plate may be arranged to provide an empty space between the connection plate and a separate component provided separately. As a second example, the support may include a support plate 35 . The support plate may include a portion extending in a longitudinal direction of the vacuum space portion or may include a portion extending along a direction in which the plate extends. The support plate may be provided to support only one of the first plate and the second plate, or 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, and the other surface of the support plate may be provided so as not to contact another 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, and the other surface of the support plate may be provided to support another portion of the plate. The cross-sectional shape of the support plate is not limited. The support includes a support plate provided with an empty space therein, the support includes a plurality of support plates and an empty space is provided between the plurality of support plates, or the support includes a support plate and the support The plate may be arranged to provide an empty space between the support plate and a separate component provided separately. As a third example, the support may include a porous material 33 or a filler 33 . The inside of the vacuum space may be supported by a porous material or a filler. The inside of the vacuum space part 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, and the plurality of porous materials or a plurality of fillers may be arranged to contact each other. When an empty space is provided inside the porous material, an empty space is provided between a plurality of porous materials, or an empty space is provided between the porous material and a separate component distinct from the porous material, the porous material As described above, it may be understood as any one of a connection plate and a support plate. When an empty space is provided inside the filler, an empty space is provided between a plurality of fillers, or an empty space is provided between the filler and a separate component distinct from the filler, the filler is as described above, It may be understood as any one of a connection plate and a support plate. The support of the present invention may include any one of the above examples or an example in which two or more are combined.

Referring to FIG. 3A , as an embodiment, the support may include a bar 31 and a connecting plate and a supporting plate 35 . The connection plate and the support plate may be designed separately. Referring to FIG. 3B , as an embodiment, the support may include a bar 31 , a connecting plate/support plate 35 , and a porous material 33 filled in the vacuum space. The porous material 33 may have a higher emissivity than stainless steel, which is a material of the plate, but since the vacuum space is filled, the resistance efficiency of radiant heat transfer is high. The porous material may also function as a heat transfer resistor to be described later. More preferably, the porous material may perform the function of a radiation resistance sheet to be described later. Referring to FIG. 3C , as an embodiment, the support may include a porous material 33 or a filler 33 . The porous material 33 may be provided in a compressed state so that the filler can maintain the gap between the vacuum space portions. The film 34 may be provided in a state in which a hole is punched, for example, as a PE material. The porous material 33 or the filler may perform both a function of a heat transfer resistor and a function of the support, which will be described later. More preferably, the porous material may perform the function of the radiation resistance sheet to be described later and the function of the support.

4 is a view for explaining an embodiment of the vacuum insulator centering on the heat transfer resistors (32, 33, 60, 63, thermal insulator, heat transfer resistance body). The vacuum insulator 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 any one of the following examples, or an example in which two or more are combined.

The heat transfer resistors 32, 33, 60 and 63 may be an object that reduces the amount of heat transfer between the first space and the second space or an object that reduces the amount of heat transfer between the first plate and the second plate. can The heat transfer resistor is disposed on a heat transfer path formed between the first space and the second space or on a heat transfer path formed between the first plate and the second plate. can be placed. The heat transfer resistor may include a portion extending in a direction along a wall defining the vacuum space portion, or the heat transfer resistor may include a portion extending in a direction in which the plate extends. Optionally, the heat transfer resistor may include a portion extending from the plate in a direction away from the vacuum space portion. The heat transfer resistor may be provided on at least a portion of a peripheral portion of the first plate and a peripheral portion of the second plate, or may be provided on at least a portion of an edge of the first plate and the second plate. The heat transfer resistor may be provided in a portion in which the through hole is formed or as a pipe connected to the through hole. A separate tube or a separate part to be distinguished from the tube may be disposed inside the tube. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. The heat transfer resistor may include a portion having a higher heat transfer resistance than the plate. In this case, the thermal insulation performance of the vacuum insulator can be further improved. A shield 62 may be provided on the outside of the heat transfer resistor to be insulated. The inside of the heat transfer resistor may be insulated by a vacuum space part. The shielding part may be provided with a porous material or a filler in contact with the outside of the inside of the heat transfer resistor. The shielding part may be provided as an insulating structure exemplified by a separate gasket placed outside the inside of the heat transfer resistor. The heat transfer resistor may be a wall defining the third space.

An example in which the heat transfer resistor is connected to the plate can be understood by replacing the support with the heat transfer resistor in the example in which the support is provided to support the plate. A duplicate description will be omitted. An example in which the heat transfer resistor is connected to the support can be understood by replacing the plate with the support in the example in which the heat transfer resistor is connected to the plate. A duplicate description will be omitted. The example of reducing heat transfer via the heat transfer body may be applied instead of the example of reducing heat transfer via the support, and the same description will be omitted.

In the present invention, the heat transfer resistor may be any one of a radiation resistance sheet 32 , a porous material 33 , a filler 33 , and a conductive resistance sheet. In the present invention, the heat transfer resistor may include a mixture of at least two of a radiation resistance sheet 32 , a porous material 33 , a filler 33 , and a conductive resistance sheet. As a first example, the heat transfer resistor may include a radiation resistance sheet (32). The radiation resistance sheet may include a portion having a greater heat transfer resistance than the plate, and the heat transfer resistance may be a degree of resistance to heat transfer by radiation. The support may perform the function of the radiation resistance sheet together. A conductive resistance sheet to be described later may perform the function of the radiation resistance sheet together. As a second example, the heat transfer resistor may include conduction resistance sheets 60 and 63 . The conductive resistance sheet may include a portion having a higher heat transfer resistance than the plate, and 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 plate. As another example, the conductive resistance sheet may include one end and the other end, and the length of the conductive resistance sheet may be longer than a 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 resistance to heat transfer by conduction than the plate. As another example, the heat transfer resistor may include a portion having a radius of curvature smaller than that of the plate.

Referring to FIG. 4A , for example, a conductive resistance sheet may be provided on a side plate connecting the first plate and the second plate. Referring to FIG. 4B , for example, a conductive resistance sheet 60 may be provided on at least a portion of the first plate and the second plate. A connection frame 70 may be further provided outside the conductive resistance sheet. The connection frame may be a portion from which the first plate or the second plate is extended, or a portion from which the side plate is extended. Optionally, the connection frame 70 may include a part to which parts disposed outside the vacuum space part are connected, such as a part for sealing the door and the body, an exhaust port necessary for an exhaust process, and a getter port for maintaining a vacuum. can 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 portion. The conduit 64 may be provided separately on the outside of the conductive resistance sheet. The conductive resistance sheet may be provided in a pleated shape. Through this, the heat transfer path can be lengthened, and deformation due to the 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 strain resistance 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 strain resistance smaller than that of at least one of the plate and the support. The plate may include a portion having less strain resistance than the support. The 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 radiation resistance sheet may include a portion having a greater radiation heat transfer resistance than at least one of the plate, the conductive resistance sheet and the support. The support may include a portion having a greater heat transfer resistance than the plate. For example, at least one of the plate, the conductive resistance sheet, and the connection frame may include stainless steel, the radiation resistance sheet may include aluminum, and the support may include a resin material.

5 is a graph for observing the process of evacuating the inside of the vacuum insulator with time and pressure when a support is used. An example of the vacuum insulator vacuum evacuation step is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

While the exhaust step is being performed, an outgassing step, which is a process in which the gas in the vacuum space is exhausted or the potential gas remaining in the parts of the vacuum insulator, is exhausted may be performed. As an example of the outgassing step, the exhausting step includes at least one of heating or drying the vacuum insulator, providing a vacuum pressure to the vacuum insulator, and providing a getter to the vacuum insulator. may include In this case, it is possible to promote the vaporization of the potential gas remaining in the parts provided in the vacuum space portion to be exhausted. The exhausting step may include cooling the vacuum insulator. The cooling step may be performed after the step of heating or drying the vacuum insulator is performed. Preferably, the step of heating or drying the vacuum insulator and the step of providing a vacuum pressure to the vacuum insulator 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 may be performed together. Preferably, after the step of heating or drying the vacuum insulator is performed, the step of cooling the vacuum insulator may be performed. Preferably, the step of providing a vacuum pressure to the vacuum insulator and the step of providing a getter to the vacuum insulator may be performed so as not to overlap. For example, after the step of providing a vacuum pressure to the vacuum insulator is performed, the step of providing a getter to the vacuum insulator may be performed. When a vacuum pressure is provided to the vacuum insulator, the pressure of the vacuum space portion may drop to a certain level and then no longer drop. At this time, after stopping the step of providing a vacuum pressure to the vacuum insulator, a getter may be introduced. As an example of stopping the step of providing the vacuum pressure to the vacuum insulator, the operation of the vacuum pump connected to the vacuum space part may be stopped. When the getter is added, the step of heating or drying the vacuum insulator may be performed together. Through this, outgassing can be promoted. As another example, after the step of providing the getter to the vacuum insulator is performed, the step of providing a vacuum pressure to the vacuum insulator may be performed.

The time during which the vacuum insulator vacuum evacuation step is performed may be referred to as a vacuum evacuation time. The vacuum exhaust time includes a time period during which the step of heating or drying the vacuum insulator is performed (Δt1), a time period during which the step of maintaining the getter in the vacuum insulator is performed (Δt2), and the vacuum insulation It may include at least one time among the time (Δt3) during which the step of cooling the sieve is performed. Examples of Δt1, Δt2, and Δt3 are as follows. It may be any one of the following examples of the present invention or a combination of two or more. In the step of evacuating the vacuum insulator, Δt1 may be greater than or equal to t1a and less than or equal to t1b. As a first example, the 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 Δt1 may be 0.3 hr or more and 12.0 hr or less. Preferably, the Δt1 may be 0.4 hr or more and 8.0 hr or less. More preferably, the Δt1 may be 0.5 hr or more and 4.0 hr or less. In this case, even if Δt1 is kept as short as possible, outgassing can be applied to a sufficient vacuum insulator. In one example, the parts of the vacuum insulator that are exposed to the vacuum space are less than any one of the parts of the vacuum insulator that are exposed to the external space of the vacuum insulator. , %) may be included. Specifically, the part exposed to the vacuum space may include a part having a lower outgassing rate than that of a thermoplastic polymer. More specifically, a support or a radiation resistance sheet may be disposed in the vacuum space portion, and the outgassing rate of the support may be lower than that of the thermoplastic plastic. As another example, a part of the vacuum insulator that is exposed to the vacuum space has a higher operating temperature than any one of the parts of the vacuum insulator that is exposed to the external space of the vacuum space. It may be a case including a part having a ° C. In this case, the vacuum insulator can be heated to a higher temperature, thereby increasing the outgassing rate. For example, the parts exposed to the vacuum space It may include a portion having a higher operating temperature than that of a thermoplastic polymer.For more specific example, a support or a radiation-resisting sheet is disposed in the vacuum space portion, and the use temperature of the support may be higher than that of the thermoplastic plastic. As another example, among the parts of the vacuum insulator, the parts exposed to the vacuum space may include more metal parts than non-metal parts, that is, the mass of the metal part is greater than the mass of the non-metal part. The volume of the metal part may be larger than the volume of the non-metal part, or the area where the metal part is exposed to the vacuum space may be larger than the area where the non-metal part is exposed to the vacuum space. When there are a plurality of parts exposed to the space, the sum of the volume of the metallic material contained in the first part and the volume of the metallic material contained in the second part is equal to the volume of the non-metal material contained in the first part and the second It may be greater than the sum of the volumes of the non-metallic materials included in the part.If there are a plurality of parts exposed to the vacuum space, the mass of the metal material included in the first part and the metal material included in the second part It may be a case in which the sum of the mass of the first part is greater than the sum of the mass of the non-metal material included in the first part and the mass of the non-metal material included in the second part. The sum of the area where the metal material included in the first part is exposed to the vacuum space part and the area where the metal material included in the second part is exposed to the vacuum space part is the sum of the area where the metal material included in the first part is exposed to the vacuum space part. Including the area exposed to the space and the second part The non-metallic material may be larger than the sum of the areas exposed to the vacuum space. As a second example, t1a may be 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 Δt1 may be greater than or equal to 1.0 hr and less than or equal to 48.0 hr. Preferably, the Δt1 may be 2 hr or more and 24.0 hr or less. More preferably, the Δt1 may be 3 hr or more and 12.0 hr or less. In this case, it may be a vacuum insulator that needs to maintain Δt1 as long as possible. In this case, it may be the case opposite to the examples described in the first example, or a case where the part exposed to the vacuum space is made of a thermoplastic material. A duplicate description will be omitted. In the step of evacuating the vacuum insulator, Δt2 may be greater than or equal to t2a and less than or equal to t2b. The t2a may be greater than or equal to 0.1 hr and less than or equal to 0.3 hr. The t2b may be greater than or equal to 1 hr and less than or equal to 5.0 hr. Preferably, the Δt2 may be 0.2 hr or more and 3.0 hr or less. More preferably, the Δt2 may be 0.3 hr or more and 2.0 hr or less. More preferably, the Δt2 may be 0.5 hr or more and 1.5 hr or less. In this case, the vacuum insulator may be sufficient for outgassing through the getter even by keeping Δt2 as short as possible. In the step of evacuating the vacuum insulator, Δt3 may be greater than or equal to t3a and less than or equal to t3b. The t3a may be greater than or equal to 0.2 hr and less than or equal to 0.8 hr. The t3b may be greater than or equal to 1 hr and less than or equal to 65.0 hr. Preferably, the Δt3 may be 0.2 hr or more and 48.0 hr or less. Preferably, the Δt3 may be 0.3 hr or more and 24.0 hr or less. More preferably, the Δt3 may be 0.4 hr or more and 12.0 hr or less. More preferably, the Δt3 may be 0.5 hr or more and 5.0 hr or less. After the heating or drying step of the exhaust step is performed, the cooling step may be performed. For example, when the heating or drying step is performed for a long time, Δt3 may be long. The vacuum insulator of the present invention may be manufactured such that Δt1 is greater than Δt2, Δt1 is less than or equal to Δt3, or Δt3 is greater than Δt2. Preferably, Δt2<Δt1≤Δt3. The vacuum insulator of the present invention has Δt1+Δt2+Δt3 greater than or equal to 0.3 hr, less than or equal to 70 hr, greater than or equal to 1 hr, less than or equal to 65 hr, greater than or equal to 2 hr, or same, and may be manufactured to be less than or equal to 24hr. More preferably, Δt1+Δt2+Δt3 may be manufactured to be greater than or equal to 3 hr and less than or equal to 6 hr.

An example of the vacuum pressure condition during the exhaust step is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The minimum value of the vacuum pressure in the vacuum space during the exhaust step may be greater than 1.8E-6 Torr. Preferably, the lowest value of the vacuum pressure is greater than 1.8E-6 Torr, less than or equal to 1.0E-4 Torr, greater than 0.5E-6 Torr, less than or equal to 1.0E-4 Torr, or 0.5E- greater than 6 Torr, and may be less than or equal to 0.5E-5 Torr. More preferably, the minimum value of the vacuum pressure may be greater than 0.5E-6 Torr and less than 1.0E-5 Torr. As described above, the reason for limiting the minimum value of the vacuum pressure provided during the exhausting step is that even when the pressure is reduced with a vacuum pump during the exhausting step, the degree of the vacuum pressure dropping below a certain level is slowed down. As an embodiment, after the evacuation 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 vacuum pressure maintained is greater than or equal to 1.0E-5 Torr, less than or equal to 1.0E-1 Torr, greater than or equal to 1.0E-5 Torr, less than or equal to 1.0E-2 Torr, or 1.0E greater than or equal to -4 Torr, less than or equal to 1.0E-2 Torr, greater than or equal to 1.0E-5 Torr, less than or equal to 1.0E-3 Torr, greater than or equal to 1.0E-4 Torr; The pressure may be less than or equal to 1.0E-3 Torr. As a result of predicting the change of the vacuum pressure in the vacuum insulator of the example, it was confirmed that the vacuum pressure was maintained below 1.0E-04Torr even after 16.3 years, and the other was 17.8 years. It was confirmed that the vacuum pressure was maintained at 1.0E-04Torr or less even in Yiru. As such, the vacuum pressure of the vacuum insulator must be maintained at a predetermined level or less, even if there is a change over time, to be used industrially.

5A is a graph of the elapsed time and pressure of an exhaust process according to an example, and FIG. 5B is an accelerated experiment of a vacuum insulator of a refrigerator having an internal volume of 128 liters to explain the results of a long-term vacuum maintenance experiment. Referring to FIG. 5B , it can be seen that the vacuum pressure is gradually increased according to the aging. For example, it was confirmed that 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 industrially applicable.

6 is a graph comparing vacuum pressure and gas conductivity. Referring to FIG. 6 , the actual heat transfer coefficient (eK) of gas conductivity according to vacuum pressure according to the size of the gap inside the vacuum space part 50 is shown as a graph. The gap of the vacuum space part 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 located inside the vacuum space, it is a distance between the radiation resistance sheet and an adjacent plate, and when there is no radiation resistance sheet inside the vacuum space, the first plate and the second plate is the distance between the plates. It can be seen that the point corresponding to the conventional real heat transfer coefficient 0.0196 W/mk for providing an insulating material by foaming polyurethane is 5.0E-1 Torr even when the size of the gap is 3 mm because the size of the gap is small. On the other hand, even if the vacuum pressure is lowered, it was confirmed that the point at which the reduction effect of the insulation effect due to the gas conduction heat is saturated is approximately 4.5E-3Torr. The pressure of 4.5E-3Torr can be determined as the point at which the reduction effect of gas conduction heat is saturated. In addition, when the real heat transfer coefficient is 0.01W/mk, it is 1.2E-2Torr. An example of the range of vacuum pressure in the vacuum space according to the gap is as follows. The support includes at least one of a bar, a connecting plate, and a support plate, and when the gap of the vacuum space is greater than or equal to 3 mm, the vacuum pressure is greater than or equal to A and less than 5E-1 Torr, or 2.65E It may be greater than -1 Torr and less than 5E-1 Torr. As another example, the support includes at least one of a bar, a connecting plate, and a support plate, and when the gap of the vacuum space is greater than or equal to 4.5 mm, the vacuum pressure is greater than or equal to A and less than 3E-1 Torr or greater than 1.2E-2 Torr and less than 5E-1 Torr. As another example, when the support includes at least one of a bar, a connecting plate, and a support plate, and the gap of the vacuum space is greater than or equal to 9 mm, the vacuum pressure is greater than or equal to A and 1.0×10^-1 It may be less than Torr, greater than 4.5E-3 Torr, and less than 5E-1 Torr, where A may be greater than or equal to 1.0×10^-6 Torr and less than or equal to 1.0E-5 Torr. Preferably, A may be 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 may be understood that the size of the gap ranges from several micrometers to several hundreds of micrometers. When the support and the porous material are provided together in the vacuum space part, a vacuum pressure intermediate between the case of using only the support and the case of using only the porous material may be used.

7 is a view showing various embodiments of the vacuum space unit. The present invention may be any one of the following examples, or an example in which two or more are combined.

Referring to FIG. 7 , the vacuum insulator of the present invention may include a vacuum space part. The vacuum space part 50 may include a first vacuum space part extending in a first direction (eg, X-axis) and having a predetermined height. The vacuum space part 50 may selectively include a second vacuum space part (hereinafter, vacuum space expansion part) different from the first vacuum space part in at least one of a height and a direction. The vacuum space extension portion may be provided by extending at least one of the first and second plates and the side plate. In this case, the heat transfer resistance can be increased by lengthening the heat conduction path along the plate. The vacuum space extension in which the second plate extends may reinforce the thermal insulation performance of a front portion of the vacuum insulator, and the vacuum space extension in which the first plate extends may be a rear portion of the vacuum insulator. It is possible to reinforce the thermal insulation performance of the side plate, the extended vacuum space extension portion can reinforce the thermal insulation performance of the side portion (side portion) of the vacuum insulator. Referring to FIG. 7A , the second plate may extend to provide the vacuum space extension part 51 . The second plate may include the vacuum space portion 50 and the second portion 202 extending from the first portion 201 forming the vacuum space extension portion 51 . The second portion 202 of the second plate may branch a heat conduction path along the second plate, thereby increasing heat transfer resistance. Referring to FIG. 7B , the side plate may extend to provide the vacuum space extension part. The side plate may include the vacuum space part 50 and the second part 152 extending from the first part 151 forming the vacuum space extension part 51 . The second portion of the side plate may branch a heat conduction path along the side plate, thereby improving thermal insulation performance. all. The first and second portions 151 and 152 of the side plate may branch a heat conduction path to increase heat transfer resistance. Referring to FIG. 7C , the first plate may extend to provide the vacuum space extension part. The first plate may include a second portion 102 extending from the first portion 101 forming the vacuum space portion 50 and the vacuum space extension portion 51 . The second part may branch the heat conduction path along the second plate, thereby increasing the heat transfer resistance. Referring to FIG. 7D , the vacuum space extension part 51 may include an X-direction extension part 51a and a Y-direction extension part 51b of the vacuum space part. The vacuum space extension part 51 may extend in a plurality of directions of the vacuum space part 50 . Through this, it is possible to reinforce the thermal insulation performance in a plurality of directions, and by lengthening the heat conduction path in a plurality of directions, it is possible to increase the heat transfer resistance. The vacuum space expansion unit extending in the plurality of directions may further improve thermal insulation performance by branching the heat conduction path. Referring to FIG. 7E , the side plate may provide the vacuum space extension unit extending in a plurality of directions. The vacuum space expansion part may reinforce the insulating performance of the side part of the vacuum insulator. Referring to FIG. 7F , the first plate may provide the vacuum space extension unit extending in a plurality of directions. The vacuum space expansion part may reinforce the insulating performance of the side part of the vacuum insulator.

8 is a view for explaining an additional insulator. The present invention may be any one of the following examples, or an example in which two or more are combined. Referring to FIG. 8 , the vacuum insulator of the present invention may optionally include an additional insulator 90 . The additional insulator may be an object having a lower degree of vacuum than the vacuum insulator or may be an object that does not include a part in a vacuum state therein. The vacuum insulator and the additional vacuum insulator may be directly connected or connected through a medium . In this case, the medium may be an object having a lower degree of vacuum than at least one of the vacuum insulator and the additional insulator, or an object that does not include a part in a vacuum state therein. When the vacuum insulator includes a portion in which the height of the vacuum insulator is high and a portion in which the height of the vacuum insulator is low, the additional insulator may be disposed in a portion in which the height of the vacuum insulator is low. The additional insulator may include a portion connected to at least a portion of the first and second plates and the side plate. The additional insulator may be supported on the plate, coupled or sealed. A degree of sealing between the additional insulator and the plate may be lower than a degree of sealing between the plates. The additional heat insulator may include a cured heat insulator (eg, PU foam) that is cured after being injected, a pre-molded resin, a peripheral heat insulator, and a side panel. At least a portion of the plate may be provided to be located inside the additional insulator. The additional insulator may include an empty space. The plate may be provided to be accommodated in the empty space. At least a portion of the plate may be provided to cover at least a portion of the additional heat insulator. The additional insulator may include a member covering the outer surface thereof. The member may be at least a part of the plate. The additional insulator may be a medium for connecting, supporting, bonding, or sealing the vacuum insulator and the component. The additional insulator may be a medium for connecting, supporting, bonding, or sealing the vacuum insulator to another vacuum insulator. The additional heat insulator may include a portion connected to a fastening part provided on at least a portion of the plate. The additional insulator may include a portion connected to a cover covering the additional insulator. The cover may be disposed between the first plate and the first space, between the second plate and the second space, or between the side plate and a space other than the vacuum space part 50 . can For example, the cover may include a part on which the component is mounted. As another example, the cover may include a portion forming an exterior of the additional heat insulator. Referring to FIGS. 8A to 8F , the additional thermal insulator may include a peripheral thermal insulator. The peripheral insulator may be disposed on at least a portion of a periphery of the vacuum insulator, a periphery of the first plate, a periphery of the second plate, and the side plate. The peripheral insulator disposed on the periphery of the first plate or the second plate may extend to the portion where the side plate is formed or to the outside of the side plate. The peripheral insulator disposed on the side plate may extend to a portion where the first plate or the second plate is formed, or may extend to an outer side of the first plate or the second plate. 8G to 8H , the additional insulator may include a central thermal insulator. The central thermal insulator includes at least a portion of a central portion of the vacuum insulator, a central portion of the first plate, and a central portion of the second plate. can be placed in

Referring to FIG. 8A , the perimeter insulation 92 may be placed on the periphery of the first plate. The perimeter insulation may contact the first plate. The peripheral insulator may be separated from the first plate or may extend further (indicated by a dotted line). The peripheral insulation may improve the thermal insulation performance of the peripheral portion of the first plate. Referring to FIG. 8B , the perimeter insulation may be disposed on the periphery of the second plate. The perimeter insulation may contact the second plate. The peripheral insulator may be separated from the second plate or may extend further (indicated by a dotted line). The peripheral insulation may improve the thermal insulation performance of the peripheral portion of the second plate. Referring to FIG. 8C , the perimeter insulation may be disposed on the periphery of the side plate. The peripheral insulation may contact the side plate. The peripheral insulation may be separated from the side plate or may extend further. The peripheral portion insulator may improve the thermal insulation performance of the peripheral portion of the side plate. Referring to FIG. 8D , the peripheral insulation 92 may be placed on the peripheral portion of the first plate. The peripheral insulator may be placed on the periphery of the first plate constituting the vacuum space expansion part 51 . The peripheral insulator may be in contact with the first plate formed by the vacuum space extension. The peripheral insulator may be separated from the first plate constituting the vacuum space extension or may further extend. The peripheral part insulator may improve the thermal insulation performance of the peripheral part of the first plate constituting the vacuum space expansion part. Referring to FIGS. 8E and 8F , in the peripheral insulator, the vacuum space expansion part may be disposed on a peripheral part of the second plate or the side plate. The same explanation as in FIG. 8D may be applied. Referring to FIG. 8G , the central insulator 91 may be placed in the central portion of the first plate. The central part insulator may improve the thermal insulation performance of the central part of the first plate. Referring to FIG. 8H , the central insulator may be disposed on the central portion of the second plate. The central part insulator may improve the thermal insulation performance of the central part of the second plate.

9 is a view for explaining a heat transfer path between first and second plates having different temperatures. An example of the heat transfer path is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The heat transfer path may pass through a portion extending from at least a portion of the first portion 101 of the first plate, the first portion 201 of the second plate, and the first portion 151 of the side plate. there is. The first part may include a part forming the vacuum space part. The extended portions 102 , 152 , and 202 may include portions extending in a direction away from the first portion. The extended portion may include a side portion of the vacuum insulator or a portion extending toward a side portion of a plate having a higher temperature among the first and second plates or a side portion of the vacuum space portion 50 . . The extended portion is a portion extending in a direction away from the front portion of the vacuum insulator or the front portion of the plate having a higher temperature among the first and second plates or the front portion of the vacuum space portion 50 . may include Through this, it is possible to reduce the generation of dew on the front part. The vacuum insulator or the vacuum space unit 50 may include first and second surfaces having different temperatures from each other. The temperature of the first surface may be lower than that of the second surface. For example, the first surface may be the first plate, and the second surface may be the second plate. The extended portion may include a portion extending in a direction away from the second surface or extending toward the first surface. The extended portion may include a portion in contact with the second surface or a portion extending in contact with the second surface. The extended portion may include a portion extending to be spaced apart from the two surfaces. The extended portion may include a portion having greater heat transfer resistance than at least a portion of the plate or greater than that of the first surface. The extended portion may include a plurality of portions extending in different directions. For example, the extended portion may include a second portion 202 of the second plate and a third portion 203 of the second plate. A third portion may also be provided on the first plate or the side plate. Through this, it is possible to increase the heat transfer resistance by lengthening the heat transfer path. In the extended portion, the above-described heat transfer resistor may be disposed. An additional thermal insulator may be disposed outside the extended portion. Through this, the extended portion can reduce the occurrence of dew on the second surface. Referring to FIG. 9A , the second plate may include the extended portion extending to the periphery of the second plate. Here, the extended portion may further include extending rearward. Referring to FIG. 9B , the side plate may include the extended portion extending to a peripheral portion of the side plate. Here, the extended portion may be provided to be shorter or the same length than the extended portion of the second plate. Here, the extended portion may further include a rearwardly extending portion. Referring to FIG. 9C , the first plate may include the extended portion extending to the periphery of the first plate. Here, the extended portion may be shorter or extend the same length as the extended portion of the second plate. Here, the extended portion may further include a rearwardly extending portion.

10 is a view for explaining a branch on a heat transfer path between first and second plates having different temperatures. An example of the branching portion is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

Optionally, the heat transfer path may pass through portions 205 , 153 , and 104 branching from at least some of the first plate, the second plate, and the side plate. Here, the branched heat transfer path means a heat transfer path that flows separately from the heat transfer path flowing along the plate and in a different direction. The branched portion may be formed in a direction away from the vacuum space portion 50 . The branched portion may be formed in a direction toward the inside of the vacuum space 50 . The branched part may perform the same function as the extended part described with reference to FIG. 9 , so a description of the same part will be omitted. Referring to FIG. 10A , the second plate may include the branched portion 205 . A plurality of the branched portions may be provided to be spaced apart from each other. The branched portion may include a third portion 203 of the second plate. Referring to FIG. 10B , the side plate may include the branched portion 153 . The branched portion 153 may branch from the second portion 152 of the side plate. At least two of the branched portions 153 may be provided. At least two branched portions 153 spaced apart from each other may be provided in the second portion 152 of the side plate. Referring to FIG. 10C , the first plate may include the branched portion 104 . The branched portion may further extend from the second portion 102 of the first plate. The branched portion may extend toward the periphery. The branched portion 104 may be bent to further extend. A direction in which the branched portion extends in FIGS. 10A, B, and C may be the same as at least one of the extending directions of the extended portion described in FIG. 10 .

11 is a view for explaining a manufacturing process of the vacuum insulator.

Optionally, the vacuum insulator may 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 may be manufactured by a vacuum insulator component assembly step in which the first plate and the second plate are assembled. Optionally, the vacuum insulator may be manufactured by evacuating a vacuum insulator in which the gas in the space formed between the first plate and the second plate is discharged. Optionally, after the vacuum insulator component preparation step is performed, the vacuum insulator component assembly step may be performed or the vacuum insulator evacuation step may be performed. Optionally, after the vacuum insulator component assembly step is performed, the vacuum insulator vacuum evacuation step may be performed. Optionally, the vacuum insulator may be manufactured by the vacuum insulator component sealing step (S3) in which the 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 evacuation step (S4). The vacuum insulator may be manufactured as an object having a predetermined purpose by the device assembling step (S5) in which the vacuum insulator is combined with the components constituting the device. The device assembling step may be performed after the vacuum insulator evacuation step. Here, the components constituting the device mean the components constituting the device together with the vacuum insulator.

The vacuum insulator component preparation step (S1) is a step in which parts constituting the vacuum insulator are prepared or manufactured. Examples of the parts constituting the vacuum insulator may include various parts such as a plate, a support, a heat transfer resistor, and a tube. The vacuum insulator component assembly step (S2) is a step in which the prepared components are assembled. The vacuum insulator component assembling step may include disposing at least a portion of the support and the heat transfer resistor on at least a portion of the plate. For example, the step of assembling the vacuum insulator component may include disposing at least a portion of the support and the heat transfer resistor between the first plate and the second plate. Optionally, the step of assembling the vacuum insulator component may include disposing a penetrating component on at least a portion of the plate. For example, the step of assembling the vacuum insulator component may include disposing a penetrating component or a surface component between the first and second plates. After the penetrating part is disposed between the first plate and the second plate, the penetrating part may be connected or sealed to the penetrating part fastening portion.

An example of the vacuum insulator vacuum evacuation step is as follows. The present invention may be any one of the following examples or an example in which two or more are combined. The vacuum insulator evacuation step may include at least one of a step in which the vacuum insulator is put into the exhaust passage, a getter activation step, a vacuum leak check step, and an exhaust port closing step. The step of forming the fastening part may be performed in at least one of the vacuum insulator component preparation step, the vacuum insulator component assembly step, and the device assembly step. Before the vacuum insulator evacuation step is performed, a step of washing parts constituting the vacuum insulator may be performed. Optionally, the washing step may include applying ultrasonic waves to the parts constituting the vacuum insulator or providing ethanol or a material containing ethanol to the surface of the parts constituting the vacuum insulator. can The ultrasonic wave may have an intensity between 10 kHz and 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 50% to 90% or less. As another example, the content of ethanol in the material may be 60% to 80% or less. As another example, the content of ethanol in the material may be 65% to 75% or less. Optionally, after the washing step is performed, a step of drying the parts 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.

By way of example, an example of a process with respect to a plate is as follows. It may be any one of the following examples of the present invention or a combination of two or more. The vacuum insulator component preparation step may include manufacturing the plate. Before the vacuum insulator evacuation step is performed, the step of manufacturing the plate may be performed. Optionally, the plate may be made of sheet metal. For example, thin and wide plates can be fabricated using plastic deformation. Optionally, the manufacturing step may include forming the plate. The forming step may be applied to the forming of the side plate, or the forming step may be applied in the process of integrally manufacturing the side plate with at least a portion of the first plate and the second plate. For example, the forming may include drawing. The forming step may include a step in which the plate is partially seated on the support. The forming step may include a step of partially applying a force to the plate. The forming step may include a step in which a part of the plate is seated on a support and a force is applied to the other part of the plate. The forming step may include deforming the plate. The deforming step may include forming at least one curved part on the plate. The deforming step may include changing the radius of curvature of the plate, or the deforming step may include changing the thickness of the plate. As a first example, the step of changing the thickness may include increasing the thickness of a portion of the plate, and the portion may include a portion extending in the longitudinal direction of the inner space (first straight portion). The part may be provided in the vicinity of the part where the plate is seated on the support in the step of forming the plate. As a second example, the step of changing the thickness may include a step of reducing the thickness of a portion of the plate, and the portion may include a portion extending in the longitudinal direction of the inner space (second straight portion). The portion may be provided in the vicinity of a portion to which a force is applied to the plate in the step of forming the plate. As a third example, the step of changing the thickness may include a step of reducing the thickness of a portion of the plate, and the portion may include a portion extending in the height direction of the inner space (second straight portion). The portion may be connected to a portion extending in the longitudinal direction of the inner space of the plate. As a fourth example, the step of changing the thickness includes increasing the thickness of a portion of the plate, wherein the portion is a portion in which the side plate extends in the longitudinal direction of the inner space and in the height direction of the inner space It may include a curved portion provided between the portions (first curved portion). The curved portion may be provided in the vicinity of a portion or a portion on which the plate is seated on the support in the step of forming the plate. As a fifth example, the step of changing the thickness includes reducing the thickness of a portion of the plate, and the portion extends in the height direction of the portion and the portion in which the side plate extends in the longitudinal direction of the inner space and the inner space It may include a curved portion provided between the portions (second curved portion). The curved portion may be provided in the vicinity of a portion to which a force is applied to the plate in the step of forming the plate. The transforming step may be any one of the above-described examples or an example in which at least two of the above-described examples are combined.

With respect to the plate, the process may optionally include washing the plate. An example of a process sequence related to the step of washing the plate is as follows. The present invention may be any one of the following examples, or a combination of two or more. Before the vacuum insulator evacuation step is performed, a step of washing the plate may be performed. After the step of manufacturing the plate is performed, at least one of the step of forming the plate and the step of washing the plate may be performed. After the step of forming the plate is performed, the step of washing the plate may be performed. Before the step of forming the plate is performed, a step of washing the plate may be performed. After the step of manufacturing the plate is performed, at least one of a step of providing the fastening part of the part to a part of the plate and a step of washing the plate may be performed. After the step of providing the part fastening part to a part of the plate is performed, the step of washing the plate may be performed.

With respect to the plate, the process may optionally include providing the plate with fasteners. An example of the process sequence related to the step of providing the fastening part to the plate is as follows. The present invention may be any one of the following examples, or a combination of two or more. Before the vacuum insulator evacuation step is performed, a step of providing the part fastening part to a part of the plate may be performed. For example, the step of providing the fastening part may include the step of manufacturing the pipe provided to the part fastening part. The tube may be connected to a portion of the plate. The tube may be disposed in an empty space provided on the plates or an empty space provided between the plates. As another example, the step of providing the fastening part may include providing a through hole in a portion of the plate. As another example, the step of providing the fastening part may include providing a curved part on at least one of the plate and the tube. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The process with respect to the plate may optionally include a process for sealing the vacuum insulator component associated with the plate. An example of the process sequence related to the step of sealing the vacuum insulator component related to the plate is as follows. The present invention may be any one of the following examples, or a combination of two or more. After the step of providing a through hole in a portion of the plate is performed, at least one of providing a curved portion to at least a portion of the plate and the tube and providing a sealing portion between the plate and the tube may be performed there is. After the step of providing the curved portion to at least one of the plate and the tube is performed, sealing between the plate and the tube may be performed. The step of providing a through hole in a part of the plate and the step of providing a curved part in at least a part of the plate and the tube may be performed simultaneously. The step of providing a through hole in a part of the plate and the step of providing a seal between the plate and the tube may be performed simultaneously. After the step of providing a curved portion to the tube is performed, a step of providing a through hole in a portion of the plate may be performed. Before the vacuum insulator evacuation step is performed, a part of the tube may be provided or sealed to the plate, and after the vacuum insulator evacuation step is performed, another part of the tube may be sealed. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

When at least a part of the plate is used integrally with the heat transfer resistor, the example of the process related to the plate may also be applied to the example of the process of the heat transfer resistor.

Optionally, the vacuum insulator may include a side plate connecting the first plate and the second plate. Examples of the side plate are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The side plate may be provided integrally with at least one of the first and second plates. The side plate may be provided integrally with any one of the first and second plates. The side plate may be provided as any one of the first and second plates. The side plate may be provided as a part of any one of the first and second plates. The side plate may be provided as a separate part from the other one of the first and second plates. In this case, optionally, the side plate may be provided to be coupled or sealed with the other one of the first and second plates. The side plate may include a portion having a greater degree of strain resistance than at least a portion of the other one of the first and second plates. The side plate may include a portion having a greater thickness than at least a portion of the other one of the first and second plates. The side plate may include a portion having a smaller radius of curvature than at least a portion of the other one of the first and second plates.

In a similar example to this, optionally, the vacuum insulator is provided to reduce the amount of heat transfer between the first space provided in the vicinity of the first plate and the second space provided in the vicinity of the second plate. may include Examples of the heat transfer resistor are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The heat transfer resistor may be provided integrally with at least one of the first and second plates. The heat transfer resistor may be provided integrally with any one of the first and second plates. The heat transfer resistor may be provided as any one of the first and second plates. The heat transfer resistor may be provided as a part of any one of the first and second plates. The heat transfer resistor may be provided as a separate component from the other one of the first and second plates. In this case, optionally, the heat transfer resistor may be provided to be coupled to or sealed with the other one of the first and second plates. The heat transfer resistor may include a portion having a higher heat transfer resistance than at least a portion of the other one of the first and second plates. The heat transfer resistor may include a portion having a smaller thickness than at least a portion of the other one of the first and second plates. The heat transfer resistor may include a portion having a smaller radius of curvature than at least a portion of the other one of the first and second plates. The heat transfer resistor may include a portion having a smaller radius of curvature than at least a portion of the other one of the first and second plates.

The contents described in FIGS. 1 to 11 may be applied to all or selectively applied to the embodiments shown in the drawings below.

One or more embodiments may provide the second plate 20 and the side plate 15 as one body. The second plate 20 and the side plate 15 may be provided by forming a single plate material. The second plate 20 and the side plate 15 may be provided by sheet metal-working. A sealing portion capable of causing vacuum breakage may not be provided at the boundary between the second plate 20 and the side plate 15 . The sealing portion may refer to a portion for fastening the two different plates. For example, the sealing part may be a sealing part. There may be no sealing portion at the contact portion between the second plate 20 and the side plate 15 . By removing the sealing part, the vacuum reliability of the vacuum insulator may be improved. Since fastening and sealing between the two members is unnecessary, the speed of mass production can be increased.

12 is a perspective view of the second plate and the side plate, FIG. 13 is a front view (a) and a cross-sectional view (b) of the second plate and the side plate, and FIG. 14 is an enlarged view of part A of FIG. 12 . As an enlarged view, a corner portion of the second plate and the side plate and a non-corner portion adjacent to the corner portion are enlarged. The corner section 211 and the non-corner section 212 are each of a single body 210 (hereinafter referred to as a single body) of the second plate and the side plate provided in a square shape. The corner portion 211 may be the same.

In one or more embodiments, in the height direction (Y-axis) of the vacuum space part 50 , the first straight part 221 , the first curved part 231 , and the third straight part 223 from top to bottom ), the second curved part 232 , and the second straight part 222 may be sequentially provided. The straight part and the curved part may be based on the shape of the single body 210 in the cross-section (XY plane or YZ plane) in the height direction (Y-axis) of the vacuum space part 50. At least the straight part Any part may have a straight shape. At least any part of the curved portion may have a curved shape.

At least a portion of the first straight portion 221 may correspond to the second portion 152 of the side plate. At least a portion of the third straight part 223 may correspond to the first part 151 of the side plate. At least a portion of the second straight portion 222 may correspond to the first portion 201 of the second plate. At least a portion of the first curved part 231 may correspond to an interval between the first straight part 221 and the third straight part 223 . At least a portion of the second curved part 232 may correspond to an interval between the second straight part 222 and the third straight part 223 .

Optionally, in the longitudinal direction (X-axis) of the vacuum space part 50 , the non-corner part 212 and the corner part 211 may be provided in series. For example, the first curved portion 231 formed in the corner portion 211 is the first curved portion 231 formed in the corner portion 211 after the non-corner first curved portion 231 that is the first curved portion 231 formed in the non-corner portion 212 . A corner first curved portion 2311 may be placed. A corner portion 211 and a non-corner portion 212 may be provided in series in the depth direction (Z axis) of the vacuum space portion 50 . The alignment of the corner portion 211 and the non-corner portion 212 may be the same for other corner portions. For example, the ratio of the first curved portion 2311 that is the first curved portion 231 formed in the corner portion 211 to the first curved portion 231 formed in the non-corner portion 212 , for example. A corner first curved portion 2312 may be placed. The same may be said for other curved or straight portions.

Optionally, the thickness of at least a portion of the plurality of curved portions may have a maximum value among the thicknesses of the single body 210 . The thickness of any one of the plurality of curved portions may have a maximum thickness value among each portion of the single body 210 . The curved portion may be placed on a portion connecting the two straight portions. Each of the two straight parts is a member that transmits a force in one direction. The curved portion, the bending stress that transmits the force transmitted from any one of the two straight portions in the other direction may be concentrated. The concentrated bending stress may cause breakage of the curved portion. In order to cope with the concentrated bending stress, the curved portion may be formed thicker than other portions of the single body 210 . For example, points j to o may be provided to be thicker than at least one of points b, f, t to y, and d.

Preferably, the thickness of at least a portion of the first curved portion 231 may have a maximum thickness value among each portion of the single body 210 . The first curved part 231 may connect the second part 152 of the side plate and the first part 151 of the side plate.

Preferably, the second part 152 of the side plate may be fixed by a jig when the single body 210 and the first plate 10 are sealed to each other. Upon sealing, the jig may hold the second portion 152 of the side plate. The second portion 152 of the side plate may support the entire load of the vacuum insulator. Since the first curved part 231 is adjacent to the fixed end of the jig, it may be the thickest among the single bodies 210 . Preferably, the first straight part 221 may be a part to be gripped when assembling and transporting the vacuum insulator. Since the first curved portion 231 is a portion adjacent to the first straight portion 221 , it may be provided to be the thickest among the single body 210 .

Preferably, when sealing the first plate 10 and the single body 210, the two members can be strongly clamped with a jig. At this time, the curved shape of the first plate 10 may be deformed by the applied pressure. In this case, in order to absorb the deformation of the first plate 10 , the first curved portion 231 may be provided to be the thickest among the single body 210 . During sealing, a vacuum pressure may be applied to the contact surfaces of the two plates for close contact between the first plate 10 and the single body 210 . In this case, in order to absorb the deformation of the first plate 10 , the first curved portion 231 may be provided to be the thickest among the single body 210 .

In one or more embodiments, the first straight portion 221 may be a portion extending into the additional insulator 90 . The first curved portion 231 may be provided to be the thickest in the single body 210 . When the additional insulator 90 is mounted, the first straight part 221 may sufficiently resist the force received from the additional insulator 90 . For example, when foaming urethane, the expansion pressure of the foamed urethane may apply a force to the first straight portion 221 . In this case, the first curved portion 231 may sufficiently support the force received by the first straight portion 221 . To this end, the first curved portion 231 may be provided to be the thickest among the plates of the vacuum insulator.

Optionally, the first curved portion 231 may be provided to be the thickest among the single body 210 . When the vacuum space part 50 is evacuated, a strong force due to a pressure difference acts at a point where the first plate 10 and the single body 210 are branched. The branching point of the first plate 10 and the single body 210 may mean a point at which the contact between the first plate 10 and the single body 210 falls. The first curved part 231 may resist the force caused by the pressure difference. A branching point between the first plate 10 and the single body 210 is to be provided to the first curved part 231 . can The branching point between the first plate 10 and the single body 210 may mean a permanent connection, such as sealing.

As described, since the first curved part 231 is provided to be the thickest among the single body 210 , the deformation of the first curved part 231 itself, the deformation of the first straight part 221 , and the relative relationship between each member It is possible to prevent at least one of position movement and distortion of the vacuum insulator.

In one or more embodiments, the first curved portion 231 may include a 1-1 curved portion 2321 adjacent to the first straight portion 221 and adjacent to the third straight portion 223 . It may include a first and second curved portion 2322. The 1-1 curved part 2321 may have a smaller radius of curvature than the 1-2 curved part 2322 . The 1-1 curved portion 2321 is a portion adjacent to the first straight portion 221 and may directly receive a large rotational moment. The 1-1 curved part 2321 may have a smaller radius of curvature than the 1-2 curved part 2322 in order to respond to the large rotational moment. The 1-1 curved part 2321 may be provided to be thicker than the 1-2 curved part 2322 . The 1-1 curved portion 2321 is a portion adjacent to the first straight portion 221 and may receive a large stress. For this reason, it can be provided thicker than the 1-2 curved part 2322 . For example, the point h may be provided with a smaller radius of curvature than the point i and a thicker thickness. Other curved portions may likewise be provided.

In one or more embodiments, the thickness of the central portion of the first curved portion 231 may be greater than the thickness of the peripheral portion of the first curved portion 231 . Through this, the central portion of the first curved portion 231 subjected to a large stress may be more firmly reinforced. Here, the center may mean the center of the first curved portion in the height direction of the vacuum space portion of the single body, that is, the XY plane or the YZ plane of the single body.

In one or more embodiments, in at least one of the plurality of curved portions, the amount of change in thickness per unit length in the corner portion 211 may be greater than the amount of change in thickness per unit length in the non-corner portion 212 . Here, the unit length may be a unit length in the height direction of the vacuum space unit 50 . The corner portion 211 may be subjected to more frequent external impact than the non-corner portion 212 . The corner portion 211 may have a greater external impact than the non-corner portion 212 . The corner portion 211 is a point at which the extension direction is changed, and stress may be concentrated. In order to respond to at least one of the external impact and concentrated stress, the thickness change per unit length of the corner portion 211 may be greater than the thickness change per unit length of the non-corner portion 212 .

Preferably, in the first curved portion 231 , an amount of change in thickness per unit length in the corner portion 211 is greater than an amount of change in thickness per unit length in the non-corner portion 212 . For example, the thickness change amount from the k point to the n point may be larger than the thickness change amount from the p point to the q point. Accordingly, it is possible to withstand external impact and concentrated stress on the first straight portion 221 of the corner portion 211 . The second straight part 222 of the corner part 211 may have a smaller external impact than the first straight part 221 of the corner part 211 .

In one or more embodiments, in at least one of the plurality of curved portions, a thickness of the curved portion placed on the corner portion 211 may be greater than a thickness of the curved portion placed on the non-corner portion 212 . For example, the k point may be provided thicker than the p point. Accordingly, it is possible to more smoothly respond to the external shock and concentrated stress concentrated on the corner portion 211 . The thickness of the corner first curved part 2311 that is the corner part 211 of the first curved part 231 is the non-corner first curved part that is the non-corner part 212 of the first curved part 231 . (2312) can be provided thicker than that.

Preferably, the first curved portion 231 may include the thickest point among the single body 210 . The corner first curved portion 2311 may include the thickest point among the single body 210 . Through this, it is possible to respond to external shock and concentrated stress. The second curved portion 232 may include the thinnest point among the single body 210 . Through this, the number of external shocks is small, the point where the stress is dispersed is thinned, and other parts can be reinforced. For example, point k may be the thickest point, and point n may be the thinnest point. The thickness of the first curved part 231 may be thicker than that of the second curved part 232 . Through this, it is possible to reinforce the part where the stress is concentrated. Here, the thickness of the first curved portion 231 and the thickness of the second curved portion 232 may be an average thickness of each curved portion.

In one or more embodiments, the thickness of the first straight part 221 may be greater than the thickness of the second straight part 222 . The thickness of the second straight part 222 may be greater than the thickness of the third straight part 223 . The thickness of the first straight part 221 may be greatest in order to prevent damage due to the clamping action of the jig. The third straight part 223 is a region to which a small load extending in the height direction of the vacuum space part 50 is applied, and may be provided as the thinnest among the straight parts. For example, point b may be thicker than point d, and point d may be thicker than point f. Here, the thickness of the first, second, and third straight lines may be an average thickness of each of the straight lines.

In one or more embodiments, the first straight part 221 may have the thickest point among the plurality of straight parts in the corner part 211 . The first straight part 221 of the corner part 211 may include the thickest point among the straight parts. Through this, it is possible to respond to external shock and concentrated stress. The second straight part 222 of the corner part 211 may include a thinnest point among the plurality of straight parts. Through this, the number of external shocks is small, the point where the stress is dispersed is thinned, and other parts can be reinforced. For example, point b may be the thickest point among the plurality of linear portions, and point f may be the thinnest point. In the corner part 211 , the first straight part 221 may be thicker than the second straight part 222 . The thickness of the first straight part 221 may be an average thickness of the second straight part 222 .

The present invention may be any one of the following examples or a combination of two or more examples.

15 is a view showing an embodiment of manufacturing the single body.

Referring to FIG. 15 , a base material, which is a flat plate processed into the single body 210 , is seated on the first restraint frame 310 . The base material may be provided in a square shape. Pressing the periphery of the base material with the second constraint frame 320 can be fixed so that vertical movement is impossible. Between the first constraint frame 310 and the second constraint frame 320, the base material can be fixed without moving up and down. Even when the first and second constraint frames 310 and 320 are constrained, the base material may be partially moved from side to side.

In the inner region of the second constraint frame 320 , the moving frame 330 may move downward to press the base material. The base material may be deformed in contact with at least one of the moving frame 330 and the first constraint frame 310 . At this time, the peripheral portions of the base material constrained by the first and second restraint frames 310 and 320 may move. By deforming the base material, it is possible to process into the shape of the single body 210 . When the displacement of the moving frame 330 is finished, the base material may become the single body 210 . When the displacement of the moving frame 330 is finished, the moving frame 330 and the first constraint frame 310 may have a predetermined distance. According to the spacing, the base material may have the shape of the single body 210 .

In one or more embodiments, the first portion 151 of the side plate may be inclined at an angle from the first portion 201 of the second plate. The first portion 151 of the side plate may extend in a direction away from the second space. The side closer to the first space of the first part 151 of the side plate may be farther from the central part of the vacuum insulator than the side closer to the second space of the first part 151 of the side plate. there is. The first portion 151 of the side plate is wider toward the side closer to the first space. The first portion 151 of the side plate may be provided to be narrower toward the bottom. The support 30 and the heat transfer resistor 32 may be guided by the first portion 151 of the side plate. The support 30 and the heat transfer resistor 32 may be inserted through a side closer to the first space. The support 30 and the heat transfer resistor 32 may be positioned according to the width of the vacuum space in the longitudinal direction. An example of the heat transfer resistor described with reference to FIG. 15 may be a radiation resistance sheet.

16 and 17 are views showing another embodiment of manufacturing the single body.

Referring to FIG. 16 , a base material is fixed between the first restraint frame 310 and the second restraint frame 320 . A periphery of the base material may be exposed to the outside of the first and second restraint frames 310 and 320 . The first moving frame 3301 may move upward to deform the periphery of the base material. The first portion 151 of the side plate may be formed by the upward movement of the first moving frame 330 . A portion to which the first and second restraint frames are fixed may be the first portion 201 of the second plate. When the first processing shown in FIG. 16 is finished, processing for forming the second part 152 of the side plate may be additionally performed.

Referring to FIG. 17 , a third restraint frame 3201 is additionally installed outside the first part 151 of the side plate. Thereafter, the base material may be expanded by pushing the second moving frame 3302 outward. The second portion 152 of the side plate may be formed by the action of the second moving frame 3302 . During the deformation of the base material using the second moving frame 3302, there is a possibility that wrinkles may occur on the surface of the base material.

According to the manufacturing method of this embodiment, three constraint frames 310, 320, 3201 and two moving frames 3301 and 3302 are required, the operation is cumbersome, and the movement and action of the constraint frame and the moving frame are difficult. There are complex problems. According to the manufacturing method of this embodiment, when the thickness of the single body is thick, it is possible to obtain the effect of providing a shape according to the design.

According to the manufacturing method of the two embodiments described above, the base material, in response to the displacement of the moving frame, the action of extension and contraction may occur. The thickness of the base material may be changed after being formed into the single body. The thickness of the single body may be different before and after performing the vacuum insulator component forming step of providing a single body that becomes a part of the vacuum insulator. After the vacuum insulator component forming step is performed, the thickness of at least a portion of the plurality of curved portions may be the thickest among the entire area of the unitary body.

When the vacuum insulator component forming step is performed, at least some of the plurality of curved portions may have a greater thickness than the base material. By increasing the thickness compared to the base material, it can withstand external impact and concentrated stress. For example, the thickness of the monolith as a whole is reduced compared to the base material, but the thickness may be increased at a specific point. For example, any point of at least a portion of the curved portion may have a maximum thickness among the single body. For example, the corner first curved portion 2311 may be the thickest among the monoliths.

18 to 27 are views for explaining a method of manufacturing a vacuum insulator. Referring to FIG. 18 , the single body 210 may be processed to form an accommodation space. The first plate 10 and the single body 210 may be fastened. In the single body 210 , the side plate 15 and the second plate 20 may be bent to form the accommodation space. In the single body 210 , the side plate 15 and the second plate 20 may extend in different directions.

Referring to FIG. 19 , a first support 301 and a second support 302 made of a resin material are provided. Through this, the thermal conductivity can be lowered. The outer panel and the inner panel may also be made of a resin material in order to lower the thermal conductivity. A heat transfer resistor 32 may be placed in the middle of the first and second supports 30 . The position of the heat transfer resistor 32 may be fixed by fastening the first and second supports 301 and 302 . In the vacuum insulator component assembly step (S2), the support 30, the heat transfer resistor, and the through component may be assembled to the plate. Here, the heat transfer resistor may include the radiation resistance sheet 32 . The heat transfer resistor may include other components.

Referring to FIG. 20 , after the first and second supports 301 and 302 and the heat transfer resistor are fastened, the assembly of the support 30 and the heat transfer resistor 32 may be placed in the accommodation space. After the assembly is placed in the receiving space, the first plate 10 may be placed on the single body 210 . In the second part 152 of the side plate, the single body 210 and the first plate 10 may be sealed to each other. Welding may be performed for sealing.

In the vacuum insulator component sealing step (S3), the vacuum space portion 50 may be sealed with respect to the first space and the second space. The vacuum insulator component sealing step (S3) may be performed by sealing the first plate 10 and the single body 210 .

21 is a view showing a state in which the first plate 10 and the single body 210 are placed on a sealing jig, and FIG. 22 is an enlarged view of the portion A of FIG. 21 . 21 and 22 , the sealing jig may include a lower jig placed on the lower side, and an upper jig placed on the upper side.

In one or more embodiments, the lower jig 321 may position the single body 210 in the correct position. The lower jig may have a seating surface along at least a portion of the first portion 201 of the second plate. The lower jig may have a seating surface along at least a portion of the side plate 15 . The single body 210 can be placed in a correct position by the seating surface. The first seating surface 312 along the first portion 201 of the second plate may have a curvature R. The curvature may be the same as that of the first portion 101 of the first plate. The angle A between the second seating surface 313 along the first portion 151 of the side plate and the seating surface along the first portion 201 of the second plate may form an obtuse angle. The lower jig 321 may have a third seating surface 314 along the second portion 152 of the side plate.

Optionally, after the single body 210 is seated on the lower jig 321 , the first plate 10 may be aligned with the single body 210 . Thereafter, the upper jig 311 may be pressed.

In one or more embodiments, the upper jig 311 may have a surface corresponding to the third seating surface 314 . The upper jig 311 may have a first pressing surface 322 that applies a pressing force to the third seating surface 314 . The upper jig 311 may have a second pressing surface 323 along the first plate 10 . The second portion 152 of the side plate may be fixed between the first pressing surface 322 and the third seating surface 314 . A load of the second pressing surface 323 may be supported by the support 30 . It is preferable not to apply an excessive load to the second pressing surface 323 so as not to damage the first plate 10 . The first pressing surface 322 and the third seating surface 314 may extend in the same direction. The second pressing surface 323 may guide the first pressing surface 322 to guide the placement of the upper jig 311 .

Optionally, the extension angle B of the first and second pressing surfaces 322 and 323 may form an obtuse angle. An extension angle B of the first and second pressing surfaces may be greater than an angle A between the first seating surface 312 and the second seating surface 313 . A position for sealing the first plate 10 and the single body 210 may be outside the upper jig 311 .

Optionally, after holding the plate with the upper jig 311, sealing may be performed. For example, the sealing may be welding. Preferably, the sealing may be a part sealed by laser welding. During sealing, the upper jig 311 may press the side plate 15 . During sealing, a negative pressure may be applied to the contact portion between the first plate 10 and the single body 210 so that the two plates come into close contact.

Thereafter, the vacuum insulator vacuum evacuation step (S4) may be performed. The vacuum insulator may be exhausted by putting the first vacuum insulator 11 into the exhaust passage 450 and evacuating the exhaust passage 450 to exhaust the vacuum insulator. The exhaust passage may accommodate at least two first vacuum insulators together.

23 is a view showing an example of the exhaust passage.

In one or more embodiments, the exhaust passage 450 heats the vacuum insulator, the exhaust passage 450 houses the vacuum insulator, and the pump 451 includes the vacuum insulator 11 . Venting can be performed together. The exhaust passage may include an exhaust heater 452 . After a certain level of exhaust is completed with respect to the first vacuum insulator, a getter may be introduced into the vacuum space unit 50 .

After that, the device assembly step (S5) may be performed. In this case, a plurality of plate surface parts may be fastened to the plate in the device assembling step. When the device is a refrigerator, the body 2 and the door may be assembled independently of each other. For example, in the case of a door, a foaming step may be performed.

Referring to FIG. 24 , the second plate 20 is mounted on the inner surface of the outer panel 211 . The outer panel 211 and the first vacuum insulator 11 may be temporarily assembled.

Referring to FIG. 25 , the first plate 10 , the upper cover 112 , the lower cover 113 , and the latch 81 may be additionally installed. The first plate 10, the single body 210, the upper cover 112, the lower cover 113, and the vacuum insulator 11 may form a space into which the foaming liquid is injected. The foaming liquid may be injected to form an additional heat insulator 90 . 26 shows a vacuum insulator that has been manufactured. 27 is a cross-sectional view taken along line 1-1 of FIG. 26 .

28 is a partial cross-sectional perspective view of the vacuum insulator, FIG. 29 is a partial front view of the cross-sectional view of FIG. 28, and FIG. 30 is a partial cross-sectional view of the unitary body.

According to an embodiment, the single body 210 may provide the second plate 20 and the side plate 15 as one body. Here, the meaning of one body may mean that the two members form one body without a fastening part such as a sealing part. The single body 210 may provide the first part 201 of the second plate, the first part 151 of the side plate, and the second part 152 of the side plate as one body. At the boundary between the second plate 20 and the side plate 15 , there is no sealing portion capable of causing vacuum breakage. In the single body 210 , there may be no sealing portion between the second plate 20 and the side plate 15 . Here, at least a part of the single body 210 may be a member that provides a wall between the second space and the vacuum space part 50 . The single body 210 may be processed to form an accommodation space.

The first plate 10 may be provided as a thinner plate than the second plate 20 . The first plate 10 may be provided as a thinner plate than the side plate 15 . The first plate 10 is a thin plate and may be a heat transfer resistor. The heat transfer resistor may be a conductive resistance sheet. The heat transfer resistor has a small cross-sectional area in a heat flow direction, so it may refer to a sheet that resists heat conduction. The heat transfer resistor may be a thin metal plate. The first plate 10 may include a heat transfer resistor as one body. The first plate 10 may have the same thickness and may be provided as a thin metal plate-like member. The first plate 10 and the single body 210 may use stainless steel as a material. The first plate 10 may be fastened to the single body 210 at the second portion 152 of the side plate. At a contact portion between the first portion 101 of the first plate and the second portion 152 of the side plate, the first plate 10 may serve as a heat transfer resistor. In the first portion 101 of the first plate adjacent to the second portion 152 of the side plate, the first plate 10 may serve as a heat transfer resistor. The first plate 10 may be provided flat and long without a pre-processed curved portion. The heat transfer resistor may be provided flat. The heat transfer resistor may not have an artificially processed curved portion except for a curved portion that is naturally contracted and deformed by vacuum pressure.

The heat transfer resistor may not have a curved portion. The heat transfer resistor may be provided as thin as 0.1 mm. Although the heat transfer resistor is quite thin, if the curved portion is provided, the heat transfer resistor may be too thin and vulnerable to breakage. The curved portion may be damaged during the vacuum evacuation process. In order to further process the curved portion, an additional process such as pressing is not required. It is preferable that the heat transfer resistor, that is, the first plate 10, has a flat shape without artificially having a curved portion as in the embodiment. Preferably, the first plate 10 provides a heat transfer resistor.

The heat transfer resistor may be provided not only on the side plate 15 side but also on the first plate 10 side. When the heat transfer resistor is provided on the side surface of the vacuum insulator extending in the height direction of the vacuum space part 50, the lateral load received by the heat transfer resistor may become excessively large. Here, the side surface of the vacuum insulator may mean a surface on which the side plate 15 is placed. In this case, the heat transfer resistor may be in contact with the support 30 , thereby increasing the risk of damage to the support 30 . It is preferable that the side plate 15 of the vacuum insulator is provided as one body with the single body 210 rather than the first plate 10 . For example, the first plate 10 may have a thickness of 0.1 mm, and the single body 210 may have a thickness of 0.5 mm.

The pier A in the extending direction of the second plate 20 and the extending direction of the side plate 15 may form an obtuse angle. The inner space of the single body 210 may form a convex accommodation space downward. The single body 210 may provide an accommodation space in the form of a basin. The accommodation space may provide the vacuum space part 50 . In the inner space provided by the wall of the second plate 20 and the side plate 15 , the support 30 can be conveniently seated from top to bottom. The side plate 15 may guide the seating of the support 30 .

The support 30 may be disposed adjacent to the side plate 15 . The single body may not be easily deformed by the vacuum pressure of the vacuum space unit 50 . The monolith may be provided to be thicker than the first plate. The distance between the support 30 and the side plate 15 may be shorter than the length of the first straight part 221 . Since the support 30 can support the gap between the first and second plates 10 and 20 up to the edge of the vacuum space 50, the vacuum space 50 can be more firmly supported. there is. It is possible to reduce the deformation of the vacuum insulator and damage to the first and second plates 10 and 20 or the side plate 15 that may occur in the periphery of the conventional heat transfer resistor.

31 is a reference diagram for explaining the curvature of each member of the vacuum insulator of the embodiment.

Referring to FIG. 31 , the first, second, and side plates 10, 20, and 15 may have a predetermined curvature to provide a vacuum insulator. Each position of the first, second, and side plates 10, 20, and 15 is described with uppercase letters. A indicates the first curved portion 231 . The radius of curvature of the first curved part 231 may be provided as 1R on the inside and 1.5R on the outside. The first curved portion 231 preferably has a small radius of curvature for contact with the first plate 10 and the formation of the vacuum space portion 50 . However, it is preferable to have the suggested radius of curvature to ensure sufficient strength and breakage of the single body 210 . Here, R is a dimensionless unit that is compared with the curvature of other regions. B indicates the second curved portion 232 . The radius of curvature of the second curved part 232 may be provided as 1.5R on the inside and 2.0R on the outside. C is the boundary between the second part 202 and the third part 203 of the second plate, and the radius of curvature may be 4.5R on the inside and 5R on the outside. The boundary portion is a portion capable of forming an exterior, and may be directly touched by the body, so it is preferable to have a smooth curved surface for safety. Since the boundary portion is bent in the XYZ triaxial direction, the radius of curvature is preferably increased. D is the curvature of the edge of the third part 203 of the second plate. The D is a portion bent along the vacuum space (50). The radius of curvature of the edge may be provided as 1R on the inside and 1.5R on the outside. The edge is a portion in contact with the first plate 10 without direct contact with the consumer.

E indicates the curvature caused by the first portion 101 of the first plate of the first plate 10 being partially supported by the support 30 . F indicates the curvature caused by the partial support of the first portion 201 of the second plate of the monolith 210 on the support 30 . A radius of curvature of the first portion 101 of the first plate may be smaller than a radius of curvature of the first portion 201 of the second plate. G is the curvature of the first plate 10 at the interval between the edge of the support 30 and the first straight portion 221 . This curvature may be generated by the vacuum pressure of the vacuum space part 50 . The curvature of the G portion may propagate along the second portion 152 of the side plate. A curvature of the H portion spaced apart from the G portion toward the edge of the second portion 152 of the side plate may occur. The H portion may be a curvature generated by propagating the thickness difference of the single body 210 and the curvature of the G portion. A radius of curvature of the part G may be smaller than a radius of curvature of the part H. The radius of curvature of the part G and the part H may be smaller than the radius of curvature of the part E.

Referring back to FIG. 14 , in the height direction (Y-axis) of the vacuum space part, from top to bottom, the first straight part 221 , the first curved part 231 , the third straight part 223 , and the second curved part The portion 232 and the second straight portion 222 may be sequentially provided. The straight part and the curved part may be based on the shape of the single body 210 in a cross section in the height direction (Y-axis) of the vacuum space part. The straight part and the curved part, at least any part of the straight part It is a straight line, and at least any part of the curved part may be curved.

At least a portion of the first straight portion 221 may correspond to the second portion 152 of the side plate. At least a portion of the third straight part 223 may correspond to the first part 151 of the side plate. At least a portion of the second straight portion 222 may correspond to the first portion 201 of the second plate. At least a portion of the first curved part 231 may correspond to an interval between the first straight part 221 and the third straight part 223 . At least a portion of the second curved part 232 may correspond to an interval between the second straight part 222 and the third straight part 223 .

In any one longitudinal direction (X-axis) or depth direction (Z-axis) of the vacuum space part 50 , a non-corner part 212 and a corner part 211 may be sequentially provided. For example, the first curved portion 231 formed in the corner portion 211 is the first curved portion 231 formed in the corner portion 211 after the non-corner first curved portion 231 that is the first curved portion 231 formed in the non-corner portion 212 . A corner first curved portion 2311 may be placed. In another longitudinal direction (Z-axis) of the vacuum space part 50 , a corner part 211 and a non-corner part 212 may be sequentially provided. The alignment of the corner portion 211 and the non-corner portion 212 may be the same on other corner portions 211 . For example, the ratio of the first curved portion 2311 that is the first curved portion 231 formed in the corner portion 211 to the first curved portion 231 formed in the non-corner portion 212 , for example. A corner first curved portion 2312 may be placed.

The first straight part 221 is a part that provides a sealing surface by the sealing part. The seal may be created by laser welding. The laser welding may be performed by heating each plate using a high-power laser. In order for the fusion of each member to be smoothly performed by the laser welding, it is preferable that the surface to be fused is flat.

The radius of curvature of the corner first curved part 2311 may have the largest radius of curvature among all the curved parts. Here, the radius of curvature may be a radius of vertical curvature in the height direction (Y-axis) of the vacuum space part. When the corner first curved part 2311 is divided into two or three zones in the vertical direction in the height direction of the vacuum state, the radius of vertical curvature of the upper zone of the corner first curved part 2311 is the highest among all the curved parts. It can have a large radius of curvature. Here, all curved portions may include all vertical curvature radii occurring in the corner portion 211 and the non-corner portion 212 of the single body 210 . Here, all curved portions may include all vertical curvature radii occurring in the corner portion 211 of the single body 210 . Here, the corner first curved part 2311 may exemplify the center of the corner when viewed in the length and depth directions (xz plane) of the vacuum space part. The radius of vertical curvature of the corner first curved portion 2311 may be increased toward the upper side. The radius of vertical curvature of the corner first curved part 2311 may be greatest at the upper end of the first curved part 231 .

Since the radius of vertical curvature of the corner first curved part 2311 is large, it is possible to suppress the occurrence of wrinkles or irregular irregularities in the first straight part 221 . When the single body 210 is press-worked, the problem of flatness of the first straight part 221 is so great that it cannot be ignored.

The laser welding is performed with respect to the first straight portion 221 . The first straight part 221 extends with respect to the first curved part 231 . At the upper end of the first curved part 231 adjacent to the first straight part 221 , the radius of vertical curvature of the corner first curved part 2311 may be greatest.

Hereinafter, a horizontal radius of curvature of the first curved part 231 on the slope (xz plane) in the height direction of the vacuum space part 50 will be described. For example, the radius of curvature of horizontally connecting virtual lines such as j-k-l points and m-n-o points may be referred to. The horizontal radius of curvature is the largest at the upper end of the corner first curved part 2311 among all the curved parts. Here, all of the curved portions may be included through all curvatures occurring in the corner portion 211 and the non-corner portion 212 of the single body 210 . Here, all curved portions may include all curved portions occurring in the corner portion 211 of the single body 210 .

A horizontal radius of curvature of the upper end of the corner portion 211 of the first curved portion 231 may be greater than 3 mm and less than 7 mm. When the horizontal radius of curvature of the upper end of the corner portion 211 of the first curved portion 231 is less than 3 mm, wrinkles may occur in the first straight portion 221 . When the horizontal radius of curvature of the first curved portion 231 of the corner portion 211 placed on the upper side is greater than 7 mm, there is a problem in that it is difficult to form the first curved portion 231 .

The horizontal radius of curvature of the upper end of the corner portion 211 of the first curved portion 231 may be a path through which the laser beam passes during the laser welding. Even when the laser beam passes outside the upper end of the first curved part 231 of the corner part 211, the radius of curvature of the path through which the laser beam passes the corner part 211 is the corner part 211 first 1 It may be the same as the horizontal curvature radius of the upper end of the curved part 231 . There may be a predetermined gap between the upper end of the first curved portion 231 of the corner portion 211 and the path through which the laser beam passes. The wrinkle of the first curved part 231 may not affect the path of the laser beam. When the first curved part 231 is vertically divided into two or three regions, the horizontal radius of curvature may be greater in the upper region of the first curved part 231 . A horizontal radius of curvature of the first curved portion 231 may be greater than a horizontal radius of curvature of the second curved portion 232 . When the second curved part 232 is vertically divided into two or three regions, the horizontal radius of curvature may be greater in the upper region of the second curved part 232 . According to this, the manufacture of the single body 210 can be convenient, the structural strength of the single body 210 is increased, wrinkles and irregularities are prevented from occurring in each member, and defects in the sealing part are suppressed. can do. At at least one point of the curved portion, the horizontal radius of curvature may be greater than the vertical radius of curvature. According to this, the sudden shape change occurring in the height direction of the vacuum space part 50 can be compensated for with a gradual shape change in the horizontal direction of the vacuum space part 50 . As the horizontal radius of curvature, by adjusting the vertical radius of curvature differently, the shape of the single body 210 can be stably realized and at the same time, irregularities that may occur locally can be prevented. A rate of change of the horizontal radius of curvature at at least one point of the curved portion may be smaller than a rate of change of the vertical radius of curvature. Accordingly, it is possible to compensate for a sudden change in curvature in the vertical direction by providing a constant and stable curvature in the horizontal direction (xz plane). The second plate 20 may have a curvature corresponding to the curvature radius of the door.

According to the present invention, it is possible to provide a vacuum insulator that can be applied to real life.

Claims (16)

first plate; second plate; a sealing part sealing the first plate and the second plate to provide a vacuum space part; and a side plate extending in the height direction of the vacuum space part,
At least a portion of the plurality of curved portions provided by the second plate and the side plate has a minimum thickness value among the second plate and the side plate. The method of claim 1,
The side plate is a vacuum insulator capable of rotating toward the center of the vacuum space using any curved portion as a supporting point. The method of claim 1,
The side plate and the second plate are vacuum insulators provided as one body. The method of claim 1,
The inner surface of the side plate is a vacuum insulator in contact with the side edge of the supporter. The method of claim 1,
The second plate and the side plate are, in the height direction (y-axis) of the vacuum space part, a first straight part above, a second straight part below, a third straight part between the first and second straight parts, a second A vacuum insulator is provided with a first curved portion between 1 and 3 straight portions, and a second curved portion between 3 and 2 straight portions, wherein the second curved portion is placed at a connection portion between the second plate and the side plate. 6. The method of claim 5,
The second curved portion is a vacuum insulator that becomes thinner toward the bottom. 6. The method of claim 5,
A lower portion of the second curved portion has a thinner thickness than an upper portion of the second curved portion. 6. The method of claim 5,
A central portion of the second curved portion is a vacuum insulator having a thinner thickness than a peripheral portion of the second curved portion. first plate; second plate; a sealing part sealing the first plate and the second plate to provide a vacuum space part; and a side plate extending in the height direction of the vacuum space, the method of providing a vacuum insulator for providing a plurality of curved portions to the second plate and the side plate,
The vacuum insulator may include: a vacuum insulator component preparation step in which parts forming the vacuum insulator are prepared in advance; a vacuum insulator component assembly step in which the prepared components are assembled; and a vacuum insulator vacuum evacuation step in which the vacuum space part gas is discharged after the component assembly step, and when the vacuum insulator component preparation step is performed, at least some of the plurality of curved parts are compared to the base material A method of manufacturing a vacuum insulator with a thinner thickness. 10. The method of claim 9,
The side plate and the second plate form one body,
A method of manufacturing a vacuum insulator in which the thickness of the plate is different before and after performing the vacuum insulator component forming step. 10. The method of claim 9,
The side plate and the second plate form one body,
After the vacuum insulator component forming step is performed, the thickness of at least a portion of the plurality of curved portions is the thinnest among the entire area of the plate. first plate; second plate; a sealing part sealing the first plate and the second plate to provide a vacuum space part; a side plate extending in a height direction of the vacuum space; and a part fastening part connected to at least one of the first and second plates to which parts are coupled,
In at least one of the plurality of curved portions provided by the second plate and the side plate, a thickness of a corner portion is thinner than a thickness of a non-corner portion. 13. The method of claim 12,
The second plate and the side plate provide a single body, and in the height direction (y-axis) of the vacuum space, the upper first straight part, the lower second straight part, and between the first and second straight parts A third straight part, a first curved part between the first and third straight parts, and a second curved part between 3 and 2 straight parts are provided, and the second curved part is provided at a connection part between the second plate and the side plate. Laying vacuum insulator. 14. The method of claim 13,
The second curved portion is a vacuum insulator having a thickness in the corner portion thinner than a thickness in the non-corner portion. 14. The method of claim 13,
In at least one of the plurality of curved portions, an amount of change in thickness per unit length in the corner portion is greater than an amount of change in thickness per unit length in the non-corner portion. 16. The method of claim 15,
In the second curved portion, an amount of change in thickness per unit length in the corner portion is greater than an amount of change in thickness per unit length in the non-corner portion.

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