KR102349196B1 - Vacuum glazing - Google Patents

Abstract

The present invention relates to vacuum glass.
Vacuum glass according to an embodiment of the present invention, the first glass and the second glass; a vacuum layer provided in spaced apart spaces of the first and second glasses; a sealing part provided between the first and second glasses; an exhaust hole provided in the second glass; and an exhaust finishing material sealing the exhaust hole after an exhaust process in which the gas between the first and second glasses is exhausted through the exhaust hole is performed.

Description

vacuum glass {Vacuum glazing}

The present invention relates to vacuum glass.

Glass can be used for the doors of household appliances. For example, the glass may be used for a door of a refrigerator. When glass is applied to the door of the refrigerator, there is an advantage in that food stored in the refrigerator can be easily checked through the transparent glass without opening the door.

However, due to the nature of the glass, the thermal insulation rate is low, so that the cold air stored in the refrigerator leaks to the outside through the glass. In particular, when the glass is composed of a single layer of plate glass, the problem of low thermal insulation rate may become more serious.

In order to compensate for such a low thermal insulation rate, the glass may be composed of a double-layer glass or a vacuum glass composed of at least two plate glasses. The multilayer glass may be configured by injecting a specific gas having a low heat transfer rate between the two plate glasses.

And, the vacuum glass may be configured by forming a vacuum in the space between the two plate glasses. In terms of the ability to block the heat transfer inside and outside the glass, the vacuum glass may be more advantageous than the multilayer glass.

The vacuum glass may be manufactured by a vacuum glass manufacturing apparatus. For example, in the vacuum glass manufacturing apparatus, a heating device for melting a sealing member for bonding two glass plates, a vacuum device for forming a vacuum inside the two glass plates, and a capping device for sealing an exhaust hole formed in the glass plate may be included.

In relation to such a vacuum glass manufacturing apparatus, the following prior art is introduced.

1. Publication number (published date): 10-2015-0124068 (November 5, 2015)

2. Title of invention: Vacuum glass panel manufacturing device

According to the prior art, the following problems exist.

First, since a vacuum chamber for forming a vacuum atmosphere is prepared, and a vacuum glass panel is put into the vacuum panel to perform a manufacturing process, the size of the vacuum chamber becomes too large. Accordingly, there is a problem in that the volume of the manufacturing apparatus increases, making it difficult to implement a compact manufacturing apparatus.

In addition, the vacuum chamber is an essential element of the conventional manufacturing apparatus, and when the vacuum chamber is not applied, vacuum leakage may occur in the capping apparatus of the vacuum glass panel. Therefore, it is not easy to implement a conventional manufacturing apparatus by removing the vacuum chamber.

Second, there is a difference between the exhaust process temperature of the vacuum glass panel and the temperature of the finishing process for sealing the exhaust hole, so that when the exhaust process and the finishing process are sequentially performed, the glass panel is damaged due to thermal shock due to the temperature difference. can occur

Third, when performing the exhaust process, stress may be concentrated around the exhaust hole, which may cause damage to the glass panel.

The present invention has been proposed to solve these problems, and an object of the present invention is to provide an apparatus for manufacturing a vacuum glass capable of improving thermal insulation performance.

Another object of the present invention is to provide an apparatus for manufacturing vacuum glass having a compact structure. In particular, an object of the present invention is to provide an apparatus for manufacturing a vacuum glass that is provided with an exhaust head equipped with a heating device and a vacuum device to perform an exhaust process and a finishing process in a vacuum atmosphere.

In addition, an object of the present invention is to provide an apparatus for manufacturing a vacuum glass capable of effectively transferring exhaust pressure to the exhaust closing frit through the cap frit and preventing bubbles from being generated in the exhaust closing frit during the finishing process.

In addition, by installing a support plate on the upper side of the cap frit to prevent heat transfer between the heating device and the plate glass assembly, a vacuum glass manufacturing device that prevents thermal shock from occurring in the plate glass assembly depending on the temperature difference during the exhaust process and the finishing process. intended to provide

Another object of the present invention is to provide an apparatus for manufacturing a vacuum glass including a configuration in which the support plate can easily press the cap frit.

Another object of the present invention is to improve the structure of the exhaust closing frit to provide an apparatus for manufacturing a vacuum glass in which the gas inside the plate glass assembly can be easily exhausted.

The vacuum glass manufacturing apparatus according to an embodiment of the present invention includes an exhaust closing frit inserted into the exhaust hole of the plate glass assembly, thereby sealing the exhaust hole in the exhaust process.

The exhaust closing frit includes a frit body having an upper surface portion on which the cap frit is placed, a depression portion that is depressed upward from the bottom surface of the frit body, and an exhaust guide portion formed through the outer circumferential surface of the frit body. It is possible to prevent air bubbles from being generated in the exhaust closing frit.

Since the recessed part and the exhaust guide part communicate with each other, gas inside the plate glass assembly can be easily exhausted during the exhaust process.

The exhaust guide part may have a circular or polygonal shape.

The exhaust guide part has a diameter of at least 1 mm, so that a smooth exhaust process can be performed.

A plurality of exhaust guide units may be provided.

Among the plurality of exhaust guide parts, a gap between two adjacent exhaust guide parts is at least 1 mm, so that the shape of the exhaust closing frit may be maintained.

Since the height in the vertical direction and the length in the horizontal direction of the rectangular exhaust guide portion are at least 1 mm, the exhaust process can be easily performed and the shape of the exhaust closing frit can be easily maintained.

The exhaust hole is formed to penetrate from the top surface to the bottom surface of the second plate glass, so that the gas inside the plate glass assembly can be easily discharged.

The exhaust hole may have a stepped shape, and the exhaust closing frit may be stably supported in the stepped exhaust hole.

According to the present invention according to the above-described solution, it is possible to manufacture vacuum glass with improved thermal insulation performance.

In addition, since an apparatus for manufacturing a vacuum glass having a compact structure, which does not require a vacuum chamber for inputting the plate glass assembly, is implemented, the manufacturing process of the vacuum glass is simple and the manufacturing cost can be reduced. In particular, it is possible to easily perform the exhaust process and the finishing process in a vacuum atmosphere by providing an exhaust head equipped with a heating device and a vacuum device.

In addition, by installing the cap frit in the exhaust closing frit, exhaust pressure can be effectively transmitted to the exhaust closing frit through the cap frit when the exhaust process is performed.

In particular, since the exhaust closing frit having a cylindrical shape includes an exhaust guide formed on the outer peripheral surface, the exhaust pressure is evenly transmitted to the exhaust closing frit, thereby preventing bubbles from being generated in the exhaust closing frit during the finishing process. In addition, the gas inside the plate glass assembly may be easily exhausted through the exhaust guide part.

In addition, since the support plate is placed on the upper side of the cap frit to prevent heat transfer between the heating device and the plate glass assembly, it is possible to prevent thermal shock from occurring in the plate glass assembly due to a temperature difference during the exhaust process and the finishing process.

In addition, the elastic member is supported on the upper side of the support plate so that the support plate can easily press the cap frit, and accordingly, the stress around the exhaust hole can be distributed to the cap frit or the support plate, so that the plate glass assembly is not damaged. can be prevented.

1 is a cross-sectional view showing the configuration of a vacuum glass according to an embodiment of the present invention.
2A to 2C are views showing a manufacturing process of a plate glass assembly according to an embodiment of the present invention.
3 is a view showing the configuration of the exhaust closing device according to the first embodiment of the present invention.
4 is a view showing the configuration of the exhaust closing frit and the cap frit according to the first embodiment of the present invention.
5 is an exploded view showing the configuration of a plurality of exhaust guide parts formed on the outer peripheral surface of the exhaust closing frit according to the first embodiment of the present invention.
6 is a view showing the configuration of the support plate according to the first embodiment of the present invention.
7 is a flowchart showing a method of manufacturing a vacuum glass according to a first embodiment of the present invention.
8 is a view showing a state in which an exhaust process is performed in the exhaust closing device according to the first embodiment of the present invention.
9 is a view showing the configuration of the exhaust closing frit according to the second embodiment of the present invention.
10 is a cross-sectional view showing a state in which the exhaust closing frit is mounted on the second plate glass according to the third embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention will be able to easily suggest other embodiments within the scope of the same spirit.

[First embodiment]

1 is a cross-sectional view showing the configuration of a vacuum glass according to an embodiment of the present invention.

Referring to FIG. 1 , a vacuum glass 10 according to an embodiment of the present invention may be used for a refrigerator door.

The vacuum glass 10 includes a plurality of plate glasses 110 and 120 . The plurality of plate glasses 110 and 120 include a first plate glass 110 and a second plate glass 120 disposed on one side of the first plate glass 110 . The direction in which the first and second plate glasses 110 and 120 are disposed may vary depending on the viewing direction, but based on the drawings, the second plate glass 120 may be disposed above the first plate glass 110 .

For example, when the vacuum glass 10 is used for a refrigerator door, the second plate glass 120 may form the rear surface of the refrigerator door, and the first plate glass 110 may form the front surface of the refrigerator door.

The first plate glass 110 and the second plate glass 120 are provided in a thin plate shape. For example, the thickness of the first and second plate glasses 110 and 120 may be formed in the range of 3.5 to 4.5 mm. The first and second plate glasses 110 and 120 may have, for example, the shape of a quadrangular panel. In addition, the first and second plate glasses 110 and 120 may be provided to have the same size or shape.

The first and second plate glasses 110 and 120 may be configured to be bonded to each other. A sealant 170 may be provided between the first and second plate glasses 110 and 120 . In detail, the sealant 170 may be provided on the edge of the first plate glass 110 and the second plate glass 120 to seal the space between the first and second plate glasses 110 and 120 . have.

The sealant 170 may be applied to the first plate glass 110 . For example, the sealant 170 may be sprayed onto the first plate glass 110 . Also, the sealant 170 may be made of glass frit. When the first and second plate glasses 110 and 120 are assembled and heated after the plate glass assembly is formed, the sealant 170 may be melted and compressed between the first and second plate glasses 110 and 120 .

The first and second plate glasses 110 and 120 are disposed to be spaced apart from each other in the vertical direction, and a vacuum layer 180 may be formed in the spaced apart space. That is, the vacuum layer 180 may be formed between the top surface of the first plate glass 110 and the bottom surface of the second plate glass 120 . The vertical width of the vacuum layer 180 is about 0.18 to 0.22 mm, and the vacuum pressure ^{may be 10 -3} Torr or less.

A spacer 130 for supporting the first and second plate glasses 110 and 120 may be provided between the first and second plate glasses 110 and 120 . The spacer 130 is provided in the vacuum layer 180 and may have, for example, a substantially cylindrical shape.

A lower portion of the spacer 130 may be supported on an upper surface of the first plate glass 110 , and an upper portion may support a lower surface of the second plate glass 120 .

The spacer 130 includes a plurality of spacers 130 . A diameter of the spacers 130 may be about 0.5 mm, and an interval between the plurality of spacers 130 may be about 25 mm.

An exhaust finishing material 140 is provided on the second plate glass 120 . The exhaust finishing material 140 is configured to seal the exhaust hole 125 (refer to FIG. 2c) formed in the second plate glass 120, and may be formed by melting and cooling the exhaust closing frit 140a (refer to FIG. 3). have.

The exhaust hole 125 is configured to exhaust the gas existing between the first and second plate glasses 120 in order to form a vacuum layer 180 in the space between the first and second plate glasses 110 and 120, and the The second plate glass 120 may be configured to penetrate vertically. That is, the exhaust hole 125 may be formed to penetrate from the top surface to the bottom surface of the second plate glass 120 .

After performing exhaust through the exhaust hole 125 , the exhaust finishing material 140 blocks the exhaust hole 125 . For example, the exhaust finishing material 140 may be formed of a glass frit having a relatively low melting point.

The vacuum glass 10 further includes an exhaust cap 145 provided on the upper side of the exhaust finishing material 140 . The exhaust cap 145 has a cap shape that can cover the exhaust finishing material 140 , and may be made of a metal material. The exhaust cap 145 prevents the pressure outside the vacuum glass 10 from acting on the exhaust finisher 140 , and thus the exhaust finisher 140 escapes from the exhaust hole 125 or the exhaust. It is possible to prevent damage to the finishing material 140 .

The vacuum glass 10 further includes a gas adsorbent 160 (getter). The gas adsorbent 160 may be understood as a configuration capable of adsorbing moisture or gas that may be generated during the manufacturing process of the vacuum glass 10 .

That is, even if the vacuum layer 180 is formed inside the vacuum glass 10, moisture or a predetermined gas may be generated in the first and second plate glasses 110 and 120 or the spacer 130, and the gas adsorbent ( 160) adsorbs these gases, so that a vacuum state can be maintained. For example, the gas adsorbent 160 may include a non-evaporable getter that is activated when an electric current flows. After completion of the manufacture of the vacuum glass 10 , power supplied from the outside of the vacuum glass 10 may be supplied to the gas adsorbent 160 through a wire.

2A to 2C are views showing a manufacturing process of a plate glass assembly according to an embodiment of the present invention.

First, referring to FIG. 2 , a first plate glass 110 is prepared. The first plate glass 110 may be provided in a washed state.

A sealant 170 is applied to the first plate glass 110 . The sealant 170 may be applied along the edge of the first plate glass 110 . For example, the sealant 170 may be applied on one surface of the first plate glass 110 in a rectangular shape.

A spacer 130 may be installed on the upper surface of the first plate glass 110 . A plurality of the spacers 130 may be provided and may be arranged at preset intervals. For example, the plurality of spacers 130 may be arranged in a lattice (matrix) shape. The plurality of spacers 130 may protrude from the upper surface of the first pane 110 ( FIG. 2B ).

The second plate glass 120 may be covered on the upper side of the first plate glass 110 . When the second plate glass 120 is disposed, the upper portions of the plurality of spacers 130 may support the lower surface of the second plate glass 120 .

An exhaust hole 125 may be formed in the second plate glass 120 . As described above, the exhaust hole 125 is understood as a configuration for forming the vacuum layer 180 by exhausting the gas existing between the first and second plate glasses 110 and 120 . In addition, the gas adsorbent 160 may be provided on the bottom surface of the second plate glass 120 .

When the first and second plate glasses 110 and 120 are assembled by the above method, the assembly (hereinafter, plate glass assembly) of the first and second plate glasses 110 and 120 is heated, and in this process, the sealant 170 is melt-compressed and the 1 and 2, the edge portions of the panes 110 and 120 may be sealed ( FIG. 2C ).

3 is a view showing the configuration of an exhaust closing device according to a first embodiment of the present invention, FIG. 4 is a diagram showing the configuration of an exhaust closing frit and a cap frit according to the first embodiment of the present invention, FIG. 5 is It is an exploded view showing the configuration of a plurality of exhaust guide parts formed on the outer peripheral surface of the exhaust closing frit according to the first embodiment of the present invention, and FIG. 6 is a view showing the configuration of the supporting plate according to the first embodiment of the present invention.

3 to 6 , the plate glass assemblies 110 and 120 assembled by the method described in FIGS. 2A to 2C may be installed in the exhaust closing device 200 to perform an exhaust process and a finishing process.

The exhaust closing device 200 includes an exhaust head 210 to which the exhaust pipe 220 is coupled. A heating device 230 for heating and melting the exhaust closing frit 140a is disposed in the internal space of the exhaust head 210 . For example, the heating device 230 may include a heater. The internal space of the exhaust head 210 forms a flow space of exhaust gas when the exhaust process is performed.

The plate glass assemblies 110 and 120 are disposed under the exhaust head 210 . In this case, the second plate glass 120 may be coupled to the lower portion of the exhaust head 210 so that the exhaust hole 125 faces the lower portion of the exhaust head 210 .

The plate glass assemblies 110 and 120 may be provided with a vacuum pad 260 that allows the plate glass assemblies 110 and 120 and the exhaust closing device 200 to be in close contact with each other. For example, the vacuum pad 260 may be attached to the upper surfaces of the plate glass assemblies 110 and 120 , that is, the second plate glass 120 , and may be in contact with the bottom surface of the exhaust head 210 .

The vacuum pad 260 is provided between the plate glass assemblies 110 and 120 and the exhaust closing device 200 to prevent gas from leaking to the outside of the exhaust head 210 when an exhaust process is performed. For example, the vacuum pad 260 may include a graphite sheet or a metal member.

An exhaust closing frit 140a is disposed or inserted into the exhaust hole 125 of the plate glass assembly 110 and 120 . For example, at least a portion of the exhaust closing frit 140a may be inserted into the exhaust hole 125 .

The exhaust hole 125 includes a first part 125a that is inclined downwardly from the upper surface of the second plate glass 120 and a second part 125b that is depressed downwardly from the first part 125a. do. Due to the configuration of the first and second parts 125a and 125b, the exhaust hole 125 may have a stepped hole shape.

In addition, the exhaust closing frit 140a may be supported by the first part 125a.

The exhaust closing frit 140a may include a glass frit and may be formed of a mold having a predetermined shape. In detail, the exhaust closing frit 140a includes a frit body 141a having a cylindrical shape. The frit body 141a may have a body upper surface portion 142a on which the cap frit 145a is seated.

The frit body 141a includes a depression 143a that is depressed upwardly from the bottom surface of the frit body 141a. The recessed portion 143a forms a space through which gas inside the plate glass assemblies 110 and 120 is exhausted when an exhaust process is performed.

The frit body 141a further includes an exhaust guide part or a penetrating part 144a which is formed to penetrate through the outer circumferential surface of the frit body 141a and communicates with the recessed part 143a. The exhaust guide part 144a may have a circular shape.

The gas exhausted through the recessed portion 143a, that is, the exhaust gas flowing inside the frit body 141a, may be discharged in the radial direction of the exhaust closing frit 140a through the exhaust guide portion 144a. have.

A plurality of exhaust guide portions 144a may be formed on an outer peripheral surface of the frit body 141a. In detail, FIG. 5 shows a plurality of exhaust guide parts 144a formed in the frit body 141a when the outer peripheral surface of the frit body 141a is expanded.

It is preferable that the cross-sectional area of the exhaust guide part 144a is not too large. When the cross-sectional area of the exhaust guide part 144a is too large, that is, if the size of the penetrating portion of the exhaust guide part 144a is too large, the amount of the exhaust closing frit 140a is small and the exhaust hole 125 sealing effect may be lowered. For example, the sum of the cross-sectional areas of the plurality of exhaust guide parts 144a is preferably formed to be 50% or less of the cross-sectional area of the outer peripheral surface of the frit body 141a.

The length of the outer circumferential surface of the frit body 141a, that is, the horizontal length of the developed view, is the first width (a), the vertical height of the frit body 141a is the second width (b), and the exhaust guide part 144a. When the diameter is defined as the third width c, and the distance between the two exhaust guide parts 144a closest to each other among the plurality of exhaust guide parts 144a is defined as the fourth width d, the third width c ) and the fourth width (d) should form at least 1mm or more.

When the third width c is smaller than 1 mm, exhaust performance through the exhaust guide part 144a may be reduced. And, when the fourth width d is smaller than 1 mm, it is difficult to maintain the shape of the exhaust closing frit 140a, so it is not easy to produce the exhaust closing frit 140a, and the exhaust closing frit 140a during the exhaust process ( 140a) may be damaged.

The maximum size of the third width c may be b-2 (mm). In addition, the maximum allowable number of the exhaust guide parts 144a may be determined to be (a/(c+1))-1.

The first width (a) may be determined based on the diameter (d1) of the frit body (141a). The diameter d1 of the frit body 141a may be determined to be a size that can be stably supported by the exhaust hole 125 .

The exhaust closing frit 140a is inserted into the upper end of the exhaust hole 125 to move downward, and may be supported by the first part 125a. When the width of the upper end of the exhaust hole 125 is defined as the upper width w1 and the width of the lower end of the exhaust hole 125 is defined as the lower width w2, the upper width w1 is the lower width ( w2) may be formed larger than that. In another view, the upper width w1 may be understood as the width of the upper end of the first part 125a, and the lower width w2 may be understood as the width of the second part 125b.

The diameter d1 of the frit body 141a may be smaller than the upper end width w1 and larger than the lower end width w2. If the diameter d1 of the frit body 141a is larger than the width w1 of the upper end, the exhaust closing frit 140a may not be easily inserted into the exhaust hole 125 . In addition, if the diameter d1 of the frit body 141a is formed to be smaller than the width w2 of the lower end, the exhaust closing frit 140a may be separated from the exhaust hole 125 . Accordingly, the present embodiment can prevent such a problem.

A cap frit 145a is installed above the exhaust closing frit 140a. The cap frit 145a may be disposed between the exhaust closing frit 140a and the support plate 450 .

The cap frit 145a may have a disk shape and may be formed of a thin plate. In addition, the cap frit 145a is made of a glass frit, and may have a melting point higher than that of the exhaust closing frit 140a.

The lower surface of the cap frit 145a is disposed to contact the main body upper surface portion 142a of the frit body 141a, and is configured to press the frit body 141a. That is, when the exhaust process is performed, the exhaust pressure is transmitted to the frit body 141a through the cap frit 145a, and in this process, the cap frit 145a is a frit body 141a made of a glass frit. is strongly pressurized.

According to this action, it is possible to prevent bubbles from being generated in the process of melting the frit body 141a when the subsequent finishing process is performed. The bubble is a factor causing leakage of the vacuum layer 180 after the completion of the manufacture of the vacuum glass 10, and it is preferable not to generate it.

The exhaust closing device 200 further includes a support plate 250 provided under the exhaust head 210 and pressing the cap frit 145a. That is, the support plate 250 may be disposed to be in contact with the upper surface of the cap frit 145a. In the process of performing the exhaust process, the support plate 250 may press the cap frit 145a downward to guide the cap frit 145a pressing the exhaust closing frit 140a.

The support plate 250 performs a function of preventing a thermal shock from being applied to the plate glass assemblies 110 and 120 according to a temperature deviation generated during the exhaust process and the finishing process. To this end, the support plate 250 may be made of a metal material, for example, a stainless material. In addition, the support plate 250 may be positioned between the heating device 230 and the exhaust hole 125 of the plate glass assemblies 110 and 120 . The support plate 250 may be referred to as a “heat sink”.

In detail, the exhaust process may be performed in a temperature environment of about 300°C, and the finishing process may be performed in an environment of about 400°C. In addition, the melting point of the exhaust closing frit 140a may be greater than 300°C and smaller than 400°C.

When the exhaust process and the finishing process are performed, if the temperature environment of each process is transferred to the plate glass assemblies 110 and 120 as they are, a thermal shock is generated in the plate glass assemblies 110 and 120 according to the temperature deviation, and the plate glass assemblies 110 and 120 ) may be damaged. Accordingly, the support plate 250 is configured to cover the upper sides of the exhaust closing frit 140a and the cap frit 145a, and high-temperature heat is blocked from the support plate 250, so that the plate glass assemblies 110 and 120 transmission can be reduced.

As a result, since the support plate 250 can prevent heat transfer between the internal space of the exhaust head 210 and the plate glass assemblies 110 and 120 , a thermal shock occurs in the plate glass assembly according to the temperature deviation during the exhaust process and the finishing process, and thus Accordingly, it is possible to prevent the plate glass assembly from being damaged.

The support plate 250 includes a disk-shaped plate body 251 and a plate penetration part 253 that is formed through the plate body 251 and provides a flow path for exhaust gas when an exhaust process is performed. The plate body 251 functions to press the cap frit 145a and prevent heat transfer from the exhaust head 210 to the plate glass assemblies 110 and 120 .

The plate through portion 253 may be formed in an approximately central portion of the plate body 251 . The plate through portion 253 may communicate with the through portion 143a and the exhaust guide portion 144a of the exhaust closing frit 140a.

In addition, the exhaust closing device 200 further includes an elastic member 240 disposed in the inner space of the exhaust head 210 and providing an elastic force to the support plate 250 . For example, the elastic member 240 may include a coil compression spring.

The exhaust head 210 includes a spring support 215 supporting the elastic member 240 . The spring support part 215 includes a support jaw provided on the inner surface of the exhaust head 210 . The support jaw supports one side of the elastic member 240 . In addition, the other side of the elastic member 240 may be supported on the upper surface of the support plate (250). With this arrangement, since the elastic member 240 can press the support plate 250 downward, the support plate 250 presses the cap frit 145a, so that the cap frit 145a is removed. Allows the position to be fixed stably.

The elastic member 240 may be seated on an upper edge portion of the support plate 250 . For example, the diameter of the elastic member 240 may be the same as the diameter of the support plate 250 . In addition, the heating device 230 is disposed inside the elastic member 240 , and may be located upwardly spaced apart from the upper surface of the support plate 250 by a predetermined distance.

The exhaust pipe 220 is disposed to pass through the exhaust head 210 and coupled thereto, and an exhaust pump 270 may be operatively connected to the outside of the exhaust pipe 220 . The exhaust pipe 220 may be coupled through a side portion of the exhaust head 210 .

7 is a flowchart showing a method for manufacturing a vacuum glass according to a first embodiment of the present invention, and FIG. 8 is a view showing a state in which an exhaust process is performed in the exhaust closing apparatus according to the first embodiment of the present invention .

Referring to FIG. 7 , the first plate glass 110 is provided. The first plate glass 110 may be provided in a washed state (S11).

A sealant 170 is applied to the first plate glass 110 . The sealant 170 may be applied along the edge of the first plate glass 110 . In addition, a spacer 130 may be installed on the upper surface of the first plate glass 110 . A plurality of the spacers 130 may be provided and may be arranged at preset intervals. The plurality of spacers 130 may protrude from the upper surface of the first plate glass 110 (S12).

The second plate glass 120 may be covered on the upper side of the first plate glass 110 . When the second plate glass 120 is disposed, the upper portions of the plurality of spacers 130 may support the lower surface of the second plate glass 120 .

An exhaust hole 125 may be formed in the second plate glass 120 . As described above, the exhaust hole 125 is understood as a configuration for forming the vacuum layer 180 by evacuating the gas existing between the first and second plate glasses 110 and 120 . In addition, the gas adsorbent 160 may be provided on the bottom surface of the second plate glass 120 .

When the first and second plate glasses 110 and 120 are assembled by the above method, the assembly (hereinafter, plate glass assembly) of the first and second plate glasses 110 and 120 is heated, and in this process, the sealant 170 is melt-compressed and the 1 and 2, the edge portions of the panes 110 and 120 may be sealed (S13).

The plate glass assemblies 110 and 120 are installed in the exhaust finishing device 200 . In detail, a vacuum pad 260 may be coupled to upper surfaces of the plate glass assemblies 110 and 120 , and a bottom surface of the exhaust head 210 may be in close contact with the upper surface of the vacuum pad 260 .

A support plate 250 is provided at a lower portion of the exhaust head 210 , and an elastic member 240 is coupled to an upper side of the support plate 250 . The exhaust closing frit 140a is positioned in the exhaust hole 125 of the plate glass assemblies 110 and 120, and the cap frit 145a is seated on the upper side of the exhaust closing frit 140a. In addition, the support plate 250 may be arranged to press the upper surface of the cap frit 145a (S14).

The exhaust pump 270 is connected to the exhaust pipe 220 coupled to the exhaust head 210, and the internal space of the exhaust head 210 may be heated to a temperature (about 300° C.) for performing the exhaust process. . For example, the temperature increase may be achieved by the operation of the heating device 230 or another heating device (heating furnace, furnace).

By driving the exhaust pump 270 , the gas existing inside the plate glass assemblies 110 and 120 is exhausted, that is, an exhaust process is performed.

In detail, referring to FIG. 7 , when the exhaust process is performed, the gas existing inside the plate glass assemblies 110 and 120 flows through the recessed part 143a and the exhaust guide part 144a of the exhaust closing frit 140a. and flows into the inner space of the exhaust head 210 through the plate through portion 253 of the support plate 250 . And, the exhausted gas may be discharged to the exhaust pump 270 via the exhaust pipe 220 (S15).

After completion of the exhaust process, the heating device 230 is driven to melt the exhaust closing frit 140a. When the heating device 230 is driven, heat of about 400° C. higher than the melting point of the exhaust closing frit 140a may be applied to the exhaust closing frit 140a. Also, since the melting point of the cap frit 145a is greater than 400° C., melting of the cap frit 145a does not occur.

When the exhaust closing frit 140a is melted, the molten exhaust closing frit 140a constitutes the exhaust finishing material 140 to block the exhaust hole 125, and after cooling, the exhaust hole 125 can be sealed. have. In this process, the cap frit 145a constitutes the closing cap 145 to cover the upper side of the exhaust closing frit 140a, and may be in close contact with the plate glass assemblies 110 and 120 . For example, a sealant may be applied to the cap frit 145a to couple the cap frit 145a to the plate glass assemblies 110 and 120 .

As another example, after the melting and cooling process, a separate cover member may be coupled to the upper side of the cap frit 145a, and the coupled cover member may constitute the closing cap 145 (S16). .

By such a manufacturing method, the exhaust process and the finishing process of the plate glass assemblies 110 and 120 can be reliably implemented by a simple process.

Hereinafter, the second and third embodiments of the present invention will be described. Compared with the first embodiment, since these embodiments differ only in some configurations of the exhaust closing device, the differences will be mainly described. .

[Second embodiment]

9 is a view showing the configuration of the exhaust closing frit according to the second embodiment of the present invention.

Referring to FIG. 9 , the exhaust closing frit 140a ′ according to the second embodiment of the present invention may be disposed in the exhaust hole 125 of the plate glass assemblies 110 and 120 .

The exhaust closing frit 140a' includes a frit body 141a' having a cylindrical shape. The frit body 141a' may have a main body upper surface portion 142a' on which the cap frit 145a is seated.

The frit body (141a') includes a depression (143a') that is depressed upwardly from the bottom surface of the frit body (141a). The recessed portion 143a ′ forms a space through which gas inside the plate glass assemblies 110 and 120 is exhausted when an exhaust process is performed. The description of the frit body (141a'), the body upper surface part (142a') and the recessed part (143a'), the description of the first embodiment is cited.

The frit body 141a' includes an exhaust guide part or a penetrating part 144a' which is formed through the outer circumferential surface of the frit body 141a' and communicates with the recessed part 143a'. The exhaust guide part 144a may have a polygonal shape, for example, a rectangular shape.

The gas exhausted through the depression 143a', that is, the exhaust gas flowing inside the frit body 141a', passes through the exhaust guide part 144a' in the radial direction of the exhaust closing frit 140a'. can be emitted as

A plurality of the exhaust guide parts 144a' may be formed on the outer peripheral surface of the frit body 141a'. It is preferable that the cross-sectional area of the exhaust guide part 144a' is not too large. When the cross-sectional area of the exhaust guide part 144a' is too large, that is, if the size of the penetrating portion of the exhaust guide part 144a' is too large, the amount of the exhaust closing frit 140a' is small and the exhaust hole The sealing effect of (125) may be lowered. For example, the sum of the cross-sectional areas of the plurality of exhaust guide parts 144a is preferably formed to be 50% or less of the cross-sectional area of the outer peripheral surface of the frit body 141a.

The vertical height of the frit body (141a') is a second width (b), the vertical height of the exhaust guide part (144a') is a fifth width (e), and the horizontal direction of the exhaust guide part (144a'). When the length is defined as the sixth width (f) and the interval between the two exhaust guide portions 144a' is defined as the seventh width (g), the fifth width (e), the sixth width (f), and the seventh width (f) The width (g) should form at least 1mm or more.

When the fifth width e and the sixth width f are smaller than 1 mm, exhaust performance through the exhaust guide part 144a' may be reduced. In addition, when the seventh width g is smaller than 1 mm, it is difficult to maintain the shape of the exhaust closing frit 140a ′, so it is not easy to produce the exhaust closing frit 140a ′, and the exhaust closing frit 140a ′ is not easy to produce during the exhaust process. A problem in that the frit 140a' is damaged may occur.

The maximum size of the fifth width e may be b-2 (mm). And, the maximum size of the sixth width (f) may be (a-4) / 4 (mm). For the description of the first width a, the description of the first embodiment is referred to.

[Third embodiment]

10 is a cross-sectional view showing a state in which the exhaust closing frit is mounted on the second plate glass according to the third embodiment of the present invention.

Referring to FIG. 10 , the exhaust closing device 200a according to the third embodiment of the present invention includes a second plate glass 120 having an exhaust hole 125 ′.

In detail, in the exhaust hole 125 ′, a first part 125c extending downward from the upper surface of the second plate glass 120 , and a second part extending in a horizontal direction from the first part 125c . 125d and a third part 125e extending downward from the second part 125d are included. Due to the configuration of the first to third parts 125c, 125d, and 125e, the exhaust hole 125 ′ may have a stepped shape.

An exhaust closing frit 140a'' may be disposed in the exhaust hole 125'. The description of the exhaust closing frit 140a'' refers to the description of the exhaust closing frit 140a of the first embodiment.

The exhaust closing frit 140a ″ may be supported by the second part 125d. That is, since the exhaust closing frit 140a'' is supported by the second part 125d extending flatly in the horizontal direction, stable installation can be achieved.

The description of the exhaust process and the melting and finishing process using the exhaust closing frit 140a'' refers to the description of FIG. 7 .

10: vacuum glass 110: first plate glass
120: second plate glass 125: exhaust hole
130: spacer 140: exhaust finish
140a: exhaust finish frit 141a: frit body
142a: upper surface of the body 143a: depression
144a: exhaust guide part 145a: cap frit
145: exhaust cap 160: gas adsorbent
170: sealant 180: vacuum layer
200: exhaust closing device 210: exhaust head
220: exhaust pipe 230: heating device
240: elastic member 250: support plate
260: vacuum pad 270: exhaust pump

Claims (20)

A first glass and a second glass provided in the form of a thin plate;
The first and second glasses are disposed to be spaced apart from each other, and a vacuum layer provided in the spaced apart space;
a sealing part provided between the first and second glasses;
an exhaust hole provided in the second glass; and
After an exhaust process in which the gas between the first and second glasses is exhausted through the exhaust hole is performed, an exhaust finishing material for sealing the exhaust hole is included;
An exhaust passage through which the gas between the first and second glasses moves is formed by the exhaust closing frit disposed in the exhaust hole while the exhaust process is performed,
The exhaust closing frit includes a lower end supported by the exhaust hole and forming a depression through which exhaust gas flows, and an upper end having an upper surface of the body,
The main body upper surface part is configured to shield the upper side of the recessed part so that the exhaust pressure from the upper side of the exhaust closing frit acts on the upper end of the exhaust closing frit,
On the upper side of the exhaust closing frit, a cap frit having a larger diameter than the diameter of the main body upper surface portion is provided so that exhaust pressure is applied to the entire shielded body upper surface portion. The method of claim 1,
The exhaust hole penetrates from the top surface to the bottom surface of the second glass,
The diameter of the lower end of the exhaust closing frit is smaller than the diameter of the upper end of the exhaust hole and larger than the diameter of the lower end of the exhaust hole. The method of claim 1,
The exhaust hole is
A vacuum glass having an inner circumferential surface that is stepped from the upper end of the exhaust hole toward the lower end of the exhaust hole. 4. The method of claim 3,
In the exhaust hole, a first part that is inclined downwardly from the upper surface of the second glass and a second part that is depressed downwardly from the first part are formed,
The lower end of the exhaust closing frit is a vacuum glass supported by the first part. 5. The method of claim 4,
The width of the upper end of the first part is formed to be larger than the width of the second part vacuum glass. 4. The method of claim 3,
A first part extending obliquely downward from the upper surface of the second glass, a second part extending in a horizontal direction from the first part, and a third part extending downward from the second part are formed in the exhaust hole becomes,
The lower end of the exhaust closing frit is a vacuum glass supported by the second part. 2. The method of claim 1
The exhaust closing frit includes a frit body forming the upper surface portion of the main body and the recessed portion,
A vacuum glass in which an exhaust guide portion communicating with the recessed portion is formed through the outer circumferential surface of the frit body. 8. The method of claim 7,
The vacuum glass is provided with a plurality of the exhaust guide portion so as to be formed in the circumferential direction of the frit body. 8. The method of claim 7,
The vacuum glass is formed on the outer circumferential surface of the frit body so that the exhaust guide portion has a circular or rectangular shape. delete A first glass and a second glass provided in the form of a thin plate;
The first and second glasses are disposed to be spaced apart from each other, and a vacuum layer provided in the spaced apart space;
a sealing part provided between the first and second glasses;
an exhaust hole provided in the second glass; and
After an exhaust process in which the gas between the first and second glasses is exhausted through the exhaust hole is performed, an exhaust finishing material for sealing the exhaust hole is included;
An exhaust passage through which the gas between the first and second glasses moves is formed by the exhaust closing frit disposed in the exhaust hole while the exhaust process is performed,
The exhaust closing frit is
a frit body supported by the exhaust hole, the frit body including a lower end forming a depression into which exhaust gas is introduced, and an upper end to which exhaust pressure acts; and
It is formed on the frit body and includes an exhaust guide part for discharging the exhaust gas introduced into the recessed part to the outside of the frit body,
The exhaust guide portion is spaced apart from the upper end and the lower end of the frit body, respectively, the vacuum glass is formed through radially penetrating the outer peripheral surface at a position between the upper end and the lower end of the frit body. delete 12. The method of claim 11,
A plurality of the exhaust guide part is formed in the circumferential direction of the frit body,
The plurality of exhaust guide portions are vacuum glass formed at the same height based on the lower end of the frit body. 12. The method of claim 11,
The exhaust hole has an inner peripheral surface on which the lower end of the frit body is supported,
The exhaust guide portion is higher than the lower end of the exhaust hole and the vacuum glass is located lower than the upper end of the exhaust hole. 12. The method of claim 11,
The exhaust closing frit is a vacuum glass in which the lower side of the exhaust passage is opened by the recessed portion, and the upper side of the exhaust passage is closed by the upper end portion. delete delete delete delete delete

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