Tempered vacuum glass and vacuum sealing method thereof

Abstract

The application provides a tempered vacuum glass and a vacuum sealing method thereof. The vacuum sealing tempered vacuum glass comprises a first glass sheet, a second glass sheet arranged opposite to the first glass sheet in a thickness direction, a closed glass frame arranged between the first glass sheet and the second glass sheet, and an alloy layer. The alloy layer is formed by laser scanning and melting of an alloy piece arranged between the first glass sheet and the glass frame and between the second glass sheet and the glass frame to fill and flexibly connect the gap between the adjacent glass surfaces caused by roughness, so that the first glass sheet, the glass frame and the second glass sheet form a vacuum sealing space. In the application, the first glass sheet, the second glass sheet and the glass frame form the vacuum sealing space by arranging the alloy layer. The sealing effect of the alloy layer is good, and the laser welding is reliable.

Description

[0001] This application is a divisional application of application number 202210387673.1, filed on April 14, 2022, entitled "Vacuum-sealed tempered vacuum glass and method for vacuum sealing tempered glass". Technical Field

[0002] This invention relates to a tempered vacuum glass and a vacuum sealing method thereof. Background Technology

[0003] With the increasing demands for energy conservation and emission reduction on the thermal and mechanical properties of glass enclosure structures, and the need to eliminate the influence of reactive substances such as water and oxygen on the stability of perovskite photovoltaic thin films, a process technology for vacuum sealing and encapsulation using tempered glass is required.

[0004] Traditional vacuum sealing methods can be broadly divided into two types: the first type uses organic adhesive bonding, but due to factors such as organic aging, thermal stability, and gas release in a vacuum environment, the vacuum life is affected; the second type uses low-temperature solder fusion sealing, but due to the higher processing temperature affecting the glass tempering strength, and the process temperature control is more difficult.

[0005] To solve the above-mentioned technical problems, it is necessary to invent a new method for vacuum sealing tempered glass and a vacuum-sealed tempered glass. Summary of the Invention

[0006] One of the objectives of this invention is to overcome at least one deficiency in the prior art and to provide a tempered vacuum glass and a vacuum sealing method thereof.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: According to a first aspect of the present invention, a tempered vacuum glass is provided, comprising, First glass plate; The second glass sheet is disposed opposite to the first glass sheet in the thickness direction; A closed glass frame, wherein the glass frame is disposed between the first glass sheet and the second glass sheet; The alloy layer is formed by laser scanning and hot melting of alloy components disposed between the first glass sheet and the glass frame and between the second glass sheet and the glass frame to fill and flexibly connect the gaps formed by the roughness of adjacent glass surfaces, thereby forming a vacuum-sealed space between the first glass sheet, the glass frame and the second glass sheet.

[0008] Optionally, the alloy layer is formed by evaporating alloying elements in the alloy component in a saturated vapor sequence during laser scanning.

[0009] Optionally, The alloy layer is located at the midpoint of the width direction of the glass frame; and / or, The first glass sheet, the second glass sheet, and the glass frame are laser welded together, forming weld seams on both sides of the alloy layer.

[0010] According to a second aspect of the present invention, a vacuum sealing method for tempered vacuum glass is provided, comprising the steps of: Place the first glass slide into the vacuum fixture; place the first alloy component on the first glass slide; place the closed glass frame on the first alloy component; place the second alloy component on the glass frame; place the second glass slide on the second alloy component; The vacuum fixture is sealed and evacuated to a set vacuum level, thereby clamping the first glass sheet and the second glass sheet from both sides in the thickness direction, respectively. Laser scanning heats the first alloy component and the second alloy component, causing them to melt and form a liquid state. Under the action of clamping force, the liquid flows and thins to form an alloy layer, which fills and flexibly connects the gaps between the first glass sheet and the second glass sheet and the glass frame caused by roughness, thus achieving a seal.

[0011] Optionally, the alloy layer is formed by sequentially evaporating the alloying elements in the alloy part by controlling the vacuum level and laser scanning energy density.

[0012] Optionally, Before the vacuuming process, a solder ball is placed at each of the four inner corners of the glass frame. These solder balls provide an outflow channel for the gas inside the glass vacuum chamber during the vacuuming process. After the vacuuming process, the tin ball is heated by laser scanning until its height is the same as the thickness of the glass frame.

[0013] Optionally, the steps include: Place the first glass plate into the vacuum fixture; place the first alloy component on the first glass plate; place the enclosed glass frame on the first alloy component; place the second alloy component on the glass frame; place a solder ball at each of the four inner corners of the glass frame, the solder ball providing an outflow channel for the gas inside the glass vacuum chamber during vacuuming; place multiple connecting support blocks on the first glass plate, located inside the glass frame; place the second glass plate on the second alloy component and the connecting support blocks; The vacuum fixture is sealed and evacuated to a set vacuum level, thereby clamping the first glass sheet and the second glass sheet from both sides in the thickness direction, respectively. Laser scanning heats the first alloy component and the second alloy component, causing them to melt and form a liquid state. Under the action of clamping force, the liquid flows and thins to form an alloy layer, which fills and flexibly connects the gaps between the first glass sheet and the second glass sheet and the glass frame caused by roughness, thereby achieving a seal. This ensures that the first glass sheet and the second glass sheet are tightly fitted to the glass frame to meet the requirements of laser welding. Laser welding is performed on the connecting support block to form weld points, thereby laser welding the connecting support block to the first glass sheet and the second glass sheet respectively. Laser welding is also performed on the first glass sheet and the glass frame, as well as on the second glass sheet and the glass frame, thereby forming weld seams on both sides of the alloy layer. The tin ball is heated by laser scanning so that its height is the same as the thickness of the glass frame.

[0014] Optionally, the alloy layer is a transition layer with different expansion coefficients formed by the sequential evaporation of alloying elements with different saturated vapors in the alloy.

[0015] Optionally, the alloy is an indium-based alloy, a bismuth-based alloy, or a gallium-based alloy.

[0016] Optionally, the alloy is an indium-based alloy with a melting point of 120℃-260℃, and the width of the alloy layer formed is 1mm-4mm.

[0017] Unlike existing technologies, the present invention provides a vacuum-sealed tempered vacuum glass and a method for vacuum sealing tempered glass. An alloy layer is disposed between the first glass sheet and the glass frame, and the two are laser-welded together to seal the gap between them. Similarly, an alloy layer is disposed between the second glass sheet and the glass frame, and the two are laser-welded together to seal the gap between them. This allows the first glass sheet, the second glass sheet, and the glass frame to collectively form a vacuum-sealed space. The alloy layer provides excellent sealing. The laser welding is reliable.

[0018] The alloy layer can be made of low-melting-point alloy sheets or wires. After being laser-scanned and thermally melted in the vacuum fixture, it can fill and flexibly connect the gaps formed by the roughness of adjacent glass surfaces, achieving a reliable seal. Placing tin balls with a diameter of 2-3 mm at the inner corners of the glass frame provides an outflow channel for the gas inside the glass vacuum cavity during vacuuming, improving pumping efficiency and reducing residual gas inside the sealed vacuum cavity. By controlling the vacuum level of the vacuum fixture and the laser scanning energy density, different alloying elements in the saturated vapor can evaporate sequentially to form transition layers with different expansion coefficients, reducing internal stress caused by thermal expansion and contraction and preventing vacuum seal failure.

[0019] Multiple connecting support blocks can be installed inside the enclosed glass frame, located between the first and second glass sheets. The connecting support blocks are laser-welded to both the first and second glass sheets. The connecting support blocks provide sufficient connection strength after vacuum failure, ensuring the tempered vacuum glass retains sufficient safety strength even after vacuum loss.

[0020] A vacuum sealing method combining laser-welded glass and a low-melting-point alloy layer produces stable and long-lasting tempered vacuum glass. Laser welding provides sufficient strength, while the low-melting-point alloy layer provides a stable vacuum seal to meet actual product requirements.

[0021] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a vacuum-sealed tempered vacuum glass provided in one embodiment of the present invention.

[0023] Figure 2 This is a partial top view of a vacuum-sealed tempered vacuum glass provided in one embodiment of the present invention. Detailed Implementation

[0024] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0027] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0028] This invention provides a vacuum-sealed tempered vacuum glass. The vacuum-sealed tempered vacuum glass comprises: First glass plate; The second glass sheet is disposed opposite to the first glass sheet in the thickness direction; A closed glass frame, wherein the glass frame is disposed between the first glass sheet and the second glass sheet; An alloy layer is disposed between the first glass sheet and the glass frame, and the two are laser-welded together to seal the gap between them, and between the second glass sheet and the glass frame, and the two are laser-welded together to seal the gap between them, so that the first glass sheet, the glass frame and the second glass sheet form a vacuum-sealed space.

[0029] Optionally, it also includes a connecting support block; Multiple connecting support blocks are disposed inside the glass frame and located between the first glass sheet and the second glass sheet; The connecting support block is fixed to the first glass sheet and the second glass sheet by ultrafast laser welding.

[0030] Optionally, the connecting support block is a cubic glass block, and the side length of the connecting support block is the same as the thickness of the glass frame; Multiple connecting support blocks are arranged in a matrix between the second glass sheet and the first glass sheet, with a spacing of 5cm-10cm between adjacent connecting support blocks.

[0031] Optionally, the first glass sheet and the second glass sheet are two flat tempered glass sheets or two tempered glass sheets with the same curved shape; and / or, The width of the glass frame is 1cm-2cm and the thickness is 0.5mm-5mm. The distance between the edge of the glass frame and the edges of the first and second glass sheets is 1mm-2mm.

[0032] Optionally, the alloy layer material is configured to be formed by melting a low-melting-point alloy into a liquid state, flowing and thinning under clamping force, and wetting with glass, so that the first glass sheet, the second glass sheet and the glass frame form a flexible connection.

[0033] Optionally, the alloy layer is an indium-based alloy layer, a bismuth-based alloy layer, or a gallium-based alloy layer; The indium-based alloy layer has a melting point of 120℃-260℃ and a width of 1mm-4mm.

[0034] Optionally, the alloy layer is located at the midpoint of the width direction of the glass frame; and / or, The first glass sheet, the second glass sheet, and the glass frame are laser welded together, forming weld seams on both sides of the alloy layer.

[0035] This invention provides a method for vacuum sealing tempered glass. The method includes: Place the first glass plate into the vacuum fixture; place the first alloy component on the first glass plate; place the closed glass frame on the first alloy component; place the second alloy component on the glass frame; place a plurality of connecting support blocks on the first glass plate and inside the glass frame; place the second glass plate on the second alloy component and the connecting support blocks; The vacuum fixture is sealed and evacuated to a set vacuum level, thereby clamping the first glass sheet and the second glass sheet from both sides in the thickness direction, respectively. Laser scanning heats the first alloy component and the second alloy component, causing them to melt and form a liquid state. Under the action of clamping force, the liquid flows and thins to form an alloy layer, sealing the gaps between the first glass sheet and the second glass sheet and the glass frame respectively, so that the first glass sheet and the second glass sheet are tightly fitted to the glass frame to meet the requirements of laser welding. The connecting support block is laser-welded to form weld points, thereby laser-welding the connecting support block to the first glass sheet and the second glass sheet respectively, and laser-welding the first glass sheet to the glass frame and the second glass sheet to the glass frame to form welds on both sides of the alloy layer.

[0036] Optionally, it also includes: A solder ball with a diameter of 2mm-3mm is placed at each of the four inner corners of the glass frame, 5mm-10mm from the inner edge of the glass frame. The tin ball is heated by laser scanning so that its height is the same as the thickness of the glass frame.

[0037] Optionally, the first alloy component and the second alloy component are respectively a first alloy sheet and a second alloy sheet, wherein the first alloy sheet and the second alloy sheet are indium-based alloy sheets, and the initial width of the indium-based alloy sheet is 0.3mm-0.5mm; the first alloy sheet and the second alloy sheet are laser-scanned and heated to form an indium-based alloy layer, and the width of the indium-based alloy layer is 1mm-4mm; or, The first alloy component and the second alloy component are first alloy wire and second alloy wire, respectively. The first alloy wire and the second alloy wire are indium-based alloy wires, and the initial diameter of the indium-based alloy wire is 0.2mm-0.3mm. The first alloy wire and the second alloy wire are laser-scanned and heated to form an indium-based alloy layer, and the width of the indium-based alloy layer is 1mm-4mm.

[0038] According to a first embodiment of the present invention, a vacuum-sealed tempered vacuum glass is provided. (See also...) Figure 1 and Figure 2 The vacuum-sealed tempered vacuum glass includes a first glass sheet 2, a second glass sheet 1, a glass frame 6, and an alloy layer.

[0039] Both the first glass sheet 2 and the second glass sheet 1 can be configured as sheet-like structures, having a thickness direction. The second glass sheet 1 and the first glass sheet 2 are arranged opposite each other in the thickness direction.

[0040] The glass frame 6 is a closed structure. The glass frame 6 is positioned between the first glass sheet 2 and the second glass sheet 1. The shape of the closed glass frame 6 can be configured to correspond to the shapes of the second glass sheet 1 and the first glass sheet 2. For example, the glass frame 6 can be positioned around the edges of the second glass sheet 1 and the first glass sheet 2.

[0041] An alloy layer is disposed between the first glass sheet 2 and the glass frame 6, and the two are laser-welded together to seal the gap between them, and between the second glass sheet 1 and the glass frame 6, and the two are laser-welded together to seal the gap between them, so that the first glass sheet 2, the second glass sheet 1 and the glass frame 6 together form a vacuum-sealed space.

[0042] Specifically, the alloy layer includes a first alloy layer 5 and a second alloy layer 7. The first alloy layer 5 is disposed between the first glass sheet 2 and the glass frame 6, and the first glass sheet 2 and the glass frame 6 are laser welded together, sealing the gap between the first glass sheet 2 and the glass frame 6. The first alloy layer 5 can be configured as a closed structure.

[0043] The second alloy layer 7 is disposed between the second glass sheet 1 and the glass frame 6, and the second glass sheet 1 and the glass frame 6 are laser welded and fixed together, sealing the gap between the second glass sheet 1 and the glass frame 6. The second alloy layer 7 can be configured as a closed structure.

[0044] Thus, the first glass sheet 2, the first alloy layer 5, the glass frame 6, the second alloy layer 7, and the second glass sheet 1 are sequentially stacked. The first alloy layer 5 laser-welds the first glass sheet 2 to the glass frame 6 and seals the gap between them, and the second alloy layer 7 laser-welds the second glass sheet 1 to the glass frame 6 and seals the gap between them. The first glass sheet 2, the glass frame 6, and the second glass sheet 1 together form a vacuum-sealed space.

[0045] The first glass sheet 2 and the second glass sheet 1 can be configured as sheet structures with the same structural dimensions, and the first glass sheet 2 and the second glass sheet 1 are aligned in the thickness direction.

[0046] In one alternative example, as shown in the figure, the first glass sheet 2 and the second glass sheet 1 can be two flat tempered glass sheets or two tempered glass sheets with the same curved surface shape. For example, as shown in the figure, the first glass sheet 2 and the second glass sheet 1 can be two square tempered glass sheets.

[0047] The glass frame 6 is a fully enclosed structure, which can be arranged around the edges of the second glass sheet 1 and the first glass sheet 2. The edges of the glass frame 6 can be arranged to be aligned with the edges of the first glass sheet 2 and the second glass sheet 1, or the edges of the glass frame 6 can be arranged to be adjacent to the edges of the first glass sheet 2 and the second glass sheet 1.

[0048] In one alternative example, as shown in the figure, the width of the glass frame 6 can be set to 1cm-2cm, and the thickness can be set to 0.5mm-5mm. For example, the glass frame 6 can be set to be square, with four edges connected end to end.

[0049] The distance between the edge of the glass frame 6 and the edges of the first glass sheet 2 and the second glass sheet 1 can be set to 1mm-2mm.

[0050] The alloy layer material can be selected and set as needed, and it only needs to be able to seal the gap between the first glass sheet 2 and the glass frame 6, as well as the gap between the second glass sheet 1 and the glass frame 6 after heating.

[0051] In one optional example, the alloy layer may be an alloy with certain ductility, a low melting point, good fluidity after heating and melting, and good wetting with glass. Specifically, the alloy layer material is a low melting point alloy, which can form a liquid alloy after being heated and melted; the liquid alloy can flow and thin under the action of clamping forces on both sides, and wet with glass, so that the first glass sheet 2, the second glass sheet 1 and the glass frame 6 form a flexible connection.

[0052] More preferably, the alloy layer can be an indium-based alloy layer, a bismuth-based alloy layer, or a gallium-based alloy layer. Indium-based alloys, bismuth-based alloys, and gallium-based alloy layers have certain ductility, low melting points, good fluidity after heating and melting, and can wet glass well.

[0053] The alloy layer can be formed by laser scanning and heating alloy sheets or wires. After the alloy sheets or wires are laser-scanned and melted in a vacuum fixture, they can fill the gaps caused by the roughness of adjacent glass surfaces. By controlling the vacuum level in the vacuum fixture and the laser scanning, alloy elements with different expansion coefficients evaporate in sequence to form a transition layer with different expansion coefficients, thereby reducing the internal stress caused by thermal expansion and contraction and preventing vacuum seal failure.

[0054] Furthermore, as shown in the figure, the alloy layer can be an indium-based alloy layer. The melting point of the indium-based alloy layer is 120℃-260℃. The width of the indium-based alloy layer can be set to 1mm-4mm. Even further, the width of the indium-based alloy layer can be set to 1mm-3mm.

[0055] The indium-based alloy layer can be formed by laser heating of an indium-based alloy sheet. The initial width of the indium-based alloy sheet can be set to 0.3mm-0.5mm.

[0056] An indium-based alloy sheet with an initial width of 0.3-0.5 mm is laser-scanned and heated to form an indium-based alloy layer with a width of 1 mm-4 mm. The first glass sheet 2 is flexibly connected to the glass frame 6 and the gap between them is sealed. The second glass sheet 1 is flexibly connected to the glass frame 6 and the gap between them is sealed.

[0057] Of course, in other embodiments, the alloy layer can also be formed by laser scanning and heating of an alloy wire. The alloy wire is preferably an indium-based alloy wire. The initial diameter of the indium-based alloy wire can be set to 0.2mm-0.3mm. The indium-based alloy layer is formed after laser scanning and heating of the alloy wire. The width of the indium-based alloy layer is 1mm-4mm.

[0058] The alloy layer is set between the first glass sheet 2 and the glass frame 6, and between the second glass sheet 1 and the glass frame 6, which can respectively achieve the functions of sealing and welding fixation.

[0059] In this embodiment, as shown in the figure, the alloy layer can be located at the center of the width direction of the glass frame 6.

[0060] Both the first glass sheet 2 and the second glass sheet 1 can be laser-welded to the glass frame 6, forming welds 4 on both sides of the alloy layer. More preferably, the two sides in the width direction of the alloy layer are respectively the first side and the second side. At least two welds 4 can be provided on the first side in the width direction of the alloy layer. At least two welds 4 can be provided on the second side in the width direction of the alloy layer. For example, as shown in the figure, two welds 4 are provided on the first side in the width direction of the alloy layer, and two welds 4 are provided on the second side in the width direction of the alloy layer.

[0061] In this embodiment, please refer to Figure 1 and Figure 2The tempered vacuum glass may also include connecting support blocks 3 for connecting and supporting the first glass sheet 2 and the second glass sheet 1. Multiple connecting support blocks 3 are disposed inside the enclosed glass frame 6 and located between the first glass sheet 2 and the second glass sheet 1. The connecting support blocks 3 can be laser-welded to form weld points 8, thereby laser-welding and fixing the upper and lower sides of the connecting support blocks 3 to the first glass sheet 2 and the second glass sheet 1 respectively.

[0062] The connecting support block 3 can provide sufficient connection strength after vacuum failure, so that the tempered vacuum glass still has sufficient safety strength after vacuum failure.

[0063] More preferably, as shown in the figure, the connecting support block 3 can be set as a cubic glass block. The side length of the connecting support block 3 is set to be the same as the thickness of the glass frame 6.

[0064] Multiple connecting support blocks 3 can be arranged in a matrix between the second glass plate 1 and the first glass plate 2. The distance between any two adjacent connecting support blocks 3 is 5cm-10cm.

[0065] According to the same inventive concept, a second embodiment is also provided. According to the second embodiment of the present invention, a method for vacuum sealing tempered glass is provided. This method for vacuum sealing tempered glass can be used to manufacture the vacuum-sealed tempered vacuum glass provided in the first embodiment.

[0066] Please see Figure 1 and Figure 2 The tempered glass vacuum sealing method includes the following steps: Step 1: The first glass plate 2 is placed into a vacuum fixture. Specifically, the first glass plate 2 can be flat tempered glass or tempered glass with a curved shape. For example, as shown in the figure, the first glass plate 2 can be square tempered glass.

[0067] The first alloy component is placed on the first glass plate 2.

[0068] The enclosed glass frame 6 is placed on the first alloy piece. Specifically, the glass frame 6 can be square, having four end-to-end borders. The width of the borders of the glass frame 6 can be set to 1cm-2cm, and the thickness can be set to 0.5mm-5mm. The distance between the edge of the glass frame 6 and the edge of the first glass sheet 2 can be set to 1mm-2mm. The first alloy piece can be located at the middle position in the width direction of the borders of the glass frame 6.

[0069] The second alloy component is placed on the glass frame 6. Specifically, the position of the second alloy component can be aligned with the position of the first alloy component. The second alloy component and the first alloy component can be made of indium-based alloy, bismuth-based alloy, or gallium-based alloy layer; preferably, it is an indium-based antimony-bismuth alloy, the melting point of which can be set to 120℃-260℃, and the initial width can be set to 0.3 mm-0.5 mm.

[0070] A solder ball can be placed at each of the four inner corners of the glass frame 6, 5mm-10mm from the inner edge of the glass frame 6. The diameter of the solder ball can be set to 2mm-3mm.

[0071] Multiple connecting support blocks 3 are placed on the first glass sheet 2, located inside the glass frame 6. Specifically, the multiple connecting support blocks 3 are cubic glass blocks of the same material. The side length of the connecting support block 3 is the same as the thickness of the glass frame 6. The multiple connecting support blocks 3 can be arranged in a matrix between the second glass sheet 1 and the first glass sheet 2. The distance between any two adjacent connecting support blocks 3 is 5 to 10 cm.

[0072] The second glass sheet 1 is placed on the second alloy component and the connecting support block 3. Specifically, the first glass sheet 2 and the second glass sheet 1 can be configured as sheet structures with the same structural dimensions, and the first glass sheet 2 and the second glass sheet 1 are aligned in the thickness direction.

[0073] It should be noted that the specific methods in step one are not limited to the order described above. They may also include performing them in a basically simultaneous manner or in the reverse order, depending on the functions involved, or deleting some methods or steps.

[0074] Step Two: The vacuum fixture is sealed and evacuated to a set vacuum level, thereby clamping the first glass sheet 2 and the second glass sheet 1 from both sides in the thickness direction.

[0075] Specifically, the vacuum fixture can evacuate to a vacuum level of up to 10. -3 P, so that the first glass sheet 2 is attached to the first alloy component and the connecting support block 3, the first alloy component is attached to the glass frame 6, the second glass sheet 1 is attached to the second alloy component and the connecting support block 3, and the second alloy component is attached to the glass frame 6.

[0076] Step 3: Laser scanning heats the first and second alloy components, melting them to form a liquid alloy. Under clamping force, the liquid alloy flows and thins, forming alloy layers 5 and 7. Alloy layers 5 and 7 seal the gaps between the first glass sheet 2, the second glass sheet 1, and the glass frame 6, respectively, to meet the requirements of subsequent laser welding. For example, the first and second alloy components can be heated using a short-wavelength laser.

[0077] Step Four: Ultrafast laser welding is used to connect the support block 3 and form weld points 8, thereby enabling the support block 3 to be laser welded to the first glass plate 2 and the second glass plate 1 respectively.

[0078] Laser welding is used to form welds 4 on both sides of the alloy layer by connecting the first glass sheet 2 to the glass frame 6 and the second glass sheet 1 to the glass frame 6. Specifically, the two sides in the width direction of the alloy layer are designated as the first side and the second side, respectively. At least two welds 4 may be provided on the first side in the width direction of the alloy layer, and at least two welds 4 may be provided on the second side in the width direction of the alloy layer. For example, as shown in the figure, two welds 4 are provided on the first side in the width direction of the alloy layer, and two welds 4 are provided on the second side in the width direction of the alloy layer.

[0079] The laser scan heats the solder ball until its height is the same as the thickness of the glass frame 6.

[0080] It should be noted that the specific methods in step four are not limited to the order described above. They may also include performing them in a basically simultaneous manner or in the reverse order, depending on the functions involved, or deleting some methods or steps.

[0081] Step 5: Open the vacuum fixture and remove the tempered vacuum glass product.

[0082] Optionally, the following steps may be performed before step one: A fully enclosed glass frame 6 is made by hot-melting a pre-made glass rod and using a rolling method to create a four-sided enclosed glass frame 6.

[0083] Clean the first glass slide 2 and the second glass slide 1, blow them dry, and then vacuum microwave dry them at 120°C for 3 minutes.

[0084] Adjust the vacuum fixture, which is a tool for clamping the first glass sheet 2 and the second glass sheet 1 together by means of vacuum negative pressure, and can be made using existing technology.

[0085] In this embodiment, the first alloy component and the second alloy component can be a first alloy sheet and a second alloy sheet, respectively. Both the first alloy sheet and the second alloy sheet can be made of indium-based alloy sheet. The initial width of the indium-based alloy sheet is 0.3mm-0.5mm.

[0086] The first and second alloy sheets are laser-scanned and heated to form an indium-based alloy layer. The width of the indium-based alloy layer is 1mm-4mm.

[0087] Of course, in other embodiments, the first alloy component and the second alloy component can also be a first alloy wire and a second alloy wire. The first alloy wire and the second alloy wire are preferably indium-based alloy wires. The initial diameter of the indium-based alloy wire can be set to 0.2mm-0.3mm. The indium-based alloy layer is formed after laser scanning and heating of the first and second alloy wires. The width of the indium-based alloy layer is 1mm-4mm.

[0088] It should be noted that the tempered glass vacuum sealing method in this embodiment is not limited to the order described above, and may also include performing the functions involved in a substantially simultaneous manner or in the reverse order, or omitting some methods or steps.

[0089] In this invention, an alloy layer is disposed between the first glass sheet and the glass frame, and the two are laser-welded together to seal the gap between them; and a second glass sheet is disposed between the second glass sheet and the glass frame, and the two are laser-welded together to seal the gap between them, thereby enabling the first glass sheet, the second glass sheet, and the glass frame to jointly form a vacuum-sealed space. The alloy layer has excellent sealing effect, and the laser welding is reliable.

[0090] The alloy layer can be made of low-melting-point alloy sheets or wires. After being laser-scanned and thermally melted in the vacuum fixture, it can fill and flexibly connect the gaps formed by the roughness of adjacent glass surfaces, achieving a reliable seal. Tin balls with a diameter of 2-3 mm are placed at the inner corners of the glass frame to provide an outflow channel for gas inside the glass vacuum chamber during evacuation, improving evacuation efficiency and reducing residual gas inside the sealed vacuum chamber. By controlling the vacuum level of the vacuum fixture and the laser scanning energy density, different alloying elements in the saturated vapor can evaporate sequentially to form transition layers with different expansion coefficients, reducing internal stress caused by thermal expansion and contraction and preventing vacuum seal failure.

[0091] Multiple connecting support blocks can be installed inside the enclosed glass frame, located between the first and second glass sheets. The connecting support blocks are laser-welded to both the first and second glass sheets. The connecting support blocks provide sufficient connection strength after vacuum failure, ensuring the tempered vacuum glass retains sufficient safety strength even after vacuum loss.

[0092] A vacuum sealing method combining laser-welded glass and a low-melting-point alloy layer produces stable and long-lasting tempered vacuum glass. Laser welding provides sufficient strength, while the low-melting-point alloy layer provides a stable vacuum seal to meet actual product requirements.

[0093] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. Tempered vacuum glass, characterized in that, include, First glass plate; The second glass sheet is disposed opposite to the first glass sheet in the thickness direction; A closed glass frame, wherein the glass frame is disposed between the first glass sheet and the second glass sheet; The alloy layer is formed by laser scanning and hot melting of alloy components disposed between the first glass sheet and the glass frame and between the second glass sheet and the glass frame to fill and flexibly connect the gaps formed by the roughness of adjacent glass surfaces, thereby forming a vacuum-sealed space between the first glass sheet, the glass frame and the second glass sheet.

2. The tempered vacuum glass as described in claim 1, characterized in that, The alloy layer is formed by the evaporation of alloying elements in the alloy component in a saturated vapor sequence during laser scanning.

3. The tempered vacuum glass as described in claim 1, characterized in that: The alloy layer is located at the middle position in the width direction of the glass frame; and / or The first glass sheet, the second glass sheet, and the glass frame are laser welded together, forming weld seams on both sides of the alloy layer.

4. A vacuum sealing method for tempered vacuum glass, characterized in that, Including the following steps: Place the first glass slide into the vacuum fixture; place the first alloy component on the first glass slide; place the closed glass frame on the first alloy component; place the second alloy component on the glass frame; Place the second glass plate on the second alloy piece; The vacuum fixture is sealed and evacuated to a set vacuum level, thereby clamping the first glass sheet and the second glass sheet from both sides in the thickness direction, respectively. Laser scanning heats the first alloy component and the second alloy component, causing them to melt and form a liquid state. Under the action of clamping force, the liquid flows and thins to form an alloy layer, which fills and flexibly connects the gaps between the first glass sheet and the second glass sheet and the glass frame caused by roughness, thus achieving a seal.

5. The vacuum sealing method as described in claim 4, characterized in that, The alloy layer is formed by sequentially evaporating alloying elements in an alloy component by controlling the vacuum level and laser scanning energy density.

6. The vacuum sealing method as described in claim 4, characterized in that, Before the vacuuming process, a solder ball is placed at each of the four inner corners of the glass frame. These solder balls provide an outflow channel for the gas inside the glass vacuum chamber during the vacuuming process. After the vacuuming process, the solder ball is heated by laser scanning so that its height is the same as the thickness of the glass frame.

7. The vacuum sealing method as described in claim 6, characterized in that, Including the following steps: Place the first glass slide into the vacuum fixture; place the first alloy component on the first glass slide; place the closed glass frame on the first alloy component; place the second alloy component on the glass frame; A solder ball is placed at each of the four inner corners of the glass frame. The solder ball provides an outflow channel for the gas inside the glass vacuum chamber during vacuuming. Multiple connecting support blocks are placed on the first glass sheet and located inside the glass frame. A second glass sheet is placed on the second alloy piece and the connecting support blocks. The vacuum fixture is sealed and evacuated to a set vacuum level, thereby clamping the first glass sheet and the second glass sheet from both sides in the thickness direction, respectively. Laser scanning heats the first alloy component and the second alloy component, causing them to melt and form a liquid state. Under the action of clamping force, the liquid flows and thins to form an alloy layer, which fills and flexibly connects the gaps between the first glass sheet and the second glass sheet and the glass frame caused by roughness, thereby achieving a seal. This ensures that the first glass sheet and the second glass sheet are tightly fitted to the glass frame to meet the requirements of laser welding. Laser welding is performed on the connecting support block to form weld points, thereby laser welding the connecting support block to the first glass sheet and the second glass sheet respectively. Laser welding is also performed on the first glass sheet and the glass frame, as well as on the second glass sheet and the glass frame, thereby forming weld seams on both sides of the alloy layer. The tin ball is heated by laser scanning so that its height is the same as the thickness of the glass frame.

8. The tempered vacuum glass as described in claim 2 or the vacuum sealing method as described in claim 5, characterized in that, The alloy layer is a transition layer with different expansion coefficients formed by the sequential evaporation of alloying elements with different saturated vapors in the alloy.

9. The tempered vacuum glass as described in claim 1 or the vacuum sealing method as described in claim 4, characterized in that, The alloy is an indium-based alloy, a bismuth-based alloy, or a gallium-based alloy.

10. The tempered vacuum glass or vacuum sealing method as described in claim 9, characterized in that, The alloy is an indium-based alloy with a melting point of 120℃-260℃, and the width of the alloy layer formed is 1mm-4mm.

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