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KR-102961806-B1 - Vacuum glass with built-in micro vacuum valve and method of manufacturing the same

KR102961806B1KR 102961806 B1KR102961806 B1KR 102961806B1KR-102961806-B1

Abstract

The present invention relates to a vacuum glass with a built-in micro vacuum valve, comprising: a pair of corresponding glass plates (11, 12) spaced apart at a predetermined interval; a glass wall strip (13) sealed and joined by welding along the edges of the pair of glass plates (11, 12) to form a vacuum space (101); a glass strip (21) or filler arranged inside the vacuum space (101) to support vacuum pressure is provided; and a micro vacuum valve (40) is built into the vacuum space (101) thus completed, connected to a vacuum pump to reduce pressure, and then a safety cap (48) is tightened on the MVV to seal it, thereby completing the vacuum glass. In the above, productivity is innovatively increased by integrating the upper and lower glass plates (11, 12), the edge glass wall strip (13) that forms a vacuum space by sealing, and the glass strip (21) that supports vacuum pressure into a module (102, 201). In addition, by lowering the vacuum level from 30 torr to 10⁻³ torr or lower and increasing the spacing of the vacuum space, it has become possible to achieve a thermal transmittance rate that has not been seen in the market until now.

Inventors

  • 최융재

Dates

Publication Date
20260507
Application Date
20230904

Claims (9)

  1. A vacuum space (101) is formed between a pair of upper and lower glass plates (11, 12), and a glass strip (21) that supports vacuum pressure is arranged within the vacuum space. A micro vacuum valve (MVV) (40) embedded in the corner of the upper glass plate (11) is composed of an inner cylinder (41), a piston (43a), a spring (45), and a silicone liner (44). When vacuum pressure is reduced, the vacuum passage (43e) is opened and closed through an external vacuum hose adapter, and after pressure reduction, the passage is automatically sealed by the restoring force of the spring to maintain the vacuum glass. A vacuum glass with a built-in micro vacuum valve.
  2. In claim 1, The vacuum pressure supporting glass strip (21) is formed as an integrated module (102) within a vacuum space, and is characterized by having a ‘U’-shaped cut (25) formed at the bottom end for air flow, in a vacuum glass with a built-in micro vacuum valve.
  3. In claim 1 or 2, The above micro vacuum valve (40) includes a cylinder (41) inserted into a vacuum space and an outer exposed fixing ring (47), and the vacuum passage gate (43e) is set to have a diameter of 8 mm and a spring restoring force of 15 N or more, characterized in that it is a vacuum glass with a built-in micro vacuum valve.
  4. In the method for manufacturing vacuum glass of claim 1, (a) A step of forming a vacuum space (101) by combining the glass plates (11, 12) and glass strips (13, 21); (b) a step of inserting the MVV (40) into the hole in the corner of the glass plate and then connecting a vacuum hose adapter to reduce pressure; and (c) a step of sealing the passage with the spring restoring force of the piston (43a) after the depressurization is completed and then securing the safety cap (48); characterized by including a method for manufacturing vacuum glass with a built-in micro vacuum valve.
  5. In claim 4, A method for manufacturing vacuum glass with an embedded micro vacuum valve, characterized in that the pressure reduction process of step (b) above is performed in the range of 30 torr to 10 -3 torr.
  6. In claim 4, A method for manufacturing vacuum glass with a built-in micro vacuum valve, characterized in that the above MVV (40) is fixed so as to be exposed 4 to 6 mm to the outer surface of the glass plate.
  7. In claim 4, A method for manufacturing vacuum glass with an embedded micro vacuum valve, characterized by further including the step of double-sealing the vacuum passage with a silicone liner F217 after depressurization in step (b) above.
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Description

Vacuum glass with built-in micro vacuum valve and method of manufacturing the same {omitted} Vacuum glass with built-in micro vacuum valve and method of manufacturing the same {omitted} The present invention relates to vacuum glass used in glass windows, greenhouses, building exterior walls, soundproof walls, refrigerator doors, etc. More specifically, it relates to vacuum glass with a built-in micro vacuum valve (hereinafter referred to as "MVV") (40) embedded in the vacuum space (101) of the vacuum glass, which is sealed by welding along the edges of the upper and lower glass plates (11, 12) and glass wall strips (13), and connected to a vacuum pump to reduce the pressure from 30 Torr to 10⁻³ Torr or less, by optimally arranging glass strips (21) or fillers (31) which are spacers that support a maximum vacuum pressure of 10⁵ N/m² together with the edge glass wall strips (13). Representative examples of prior art for vacuum glass include; According to Collins and colleagues at the University of Sydney, US 5,902,652 (hereinafter referred to as "Citation 1"), the vacuum space of a vacuum glass is reduced to 10⁻³ torr, the spacing of the vacuum space is 0.2 mm; the diameter of the filler, which is a spacer supporting this vacuum pressure, is 0.1 - 0.3 mm and has a compressive strength of 750 MPa or more; and the spacing between the fillers is about 23 mm as seen in FIG. 1 above. As another example, in Panasonic’s Korean Patent 10-1688297 (hereinafter referred to as “Cited Invention 2”), the diameter of the spacer filler is set to 1 mm; the height is set to 100 μm, which is equal to or higher than the diameter, and the spacing between fillers is 20 mm in the longitudinal and transverse directions, with a density of 2,500 pieces/m². When calculating the thermal transmittance of the entire spacer above using Panasonic products, about 10% of the thermal transmittance of the vacuum glass is added through the spacer. This is because the vacuum spacing is very low, resulting in a large number of spacers through which heat escapes rapidly. In addition, the arrangement of a large number of filaments acts as a major obstacle to production methods and quality control. In addition, since vacuum glass reduces the pressure of a sealed internal space from 30 Torr to 10⁻³ Torr or less, the pressure inside the vacuum glass can reach up to about 10⁵ N/m², so how to support this pressure is the biggest challenge encountered in manufacturing vacuum glass. On the other hand, vacuum glass manufacturing methods using a hot chamber face limitations in lowering the thermal transmittance due to the difficulty of widening the spacing of the vacuum space. In addition, as in cited inventions 1 and 2, using a hot chamber makes it difficult to simultaneously install fillers, seal edges, and reduce pressure, which significantly lowers productivity. In addition, the high temperature of the hot chamber deforms the physical properties of laminated tempered glass (hereinafter referred to as 'VSG'), making it difficult to use. U.S. Patent No. 10,443,298/10,443,299 (hereinafter referred to as "Citation Invention 3") presents an innovative concept to solve the above-mentioned problem, but the spacer structure is very complex in structure and difficult to produce in terms of manufacturing technology, and proposes a cold depressurization method using a vacuum pump, but the vacuuming miniature piston valve (VMPV), which is a core component of the cold depressurization method, has a problem of unstable post-processing after vacuuming. In addition, the spacing of the spacers is suggested to be 120-180 mm or 140-220 mm, but this is still 25 or more per 1 m², which is far from the arrangement of fillers intended for mass production. Furthermore, even in the cold vacuum method using vacuum pumps, an easy method necessary for mass production has not yet been presented. Until now, vacuum glass manufacturing methods have been developed based on the concept of supporting vacuum pressure solely with spacers, but since most glass windows are not very large, the contribution of edge glass wall strips or edge spacers to supporting vacuum pressure should be considered, but this has been overlooked. FIG. 1. A cross-sectional view of AA' in the case of a rectangular vacuum glass with a width of 78 cm and a height of 210 cm, supported by two vacuum pressure supporting glass strips (21) that divide the width into three equal parts. FIG. 1-1. Plan view of the vacuum glass above. FIG. 1-2. Module configuration diagram 102 in which the vacuum pressure support glass strip and the edge glass strip wall of the vacuum glass of the above size are integrated. Fig. 2. Plan view of a vacuum glass measuring 72 cm in height and 240 cm in width, FIG. 2-1. Configuration diagram of module 201 of FIG. 2. FIG. 3: Positions for arranging pipes as fillers in a square vacuum glass measuring 74 cm by 74 cm, and the diagonal line of elevation (pressure line) "31" where the glass plate bend