Glass body exhaust method and device, vacuum glass and manufacturing method thereof

Abstract

The present invention discloses a method and device for exhausting a glass body, vacuum glass and a manufacturing method thereof, wherein the exhausting method comprises the following steps: placing one or more pieces of melt-formed glass bodies in an exhausting cavity; heating the exhausting cavity to a preset exhausting temperature, the preset exhausting temperature being above 250°C and not exceeding 380°C; evacuating the exhausting cavity to a preset vacuum degree; and controlling the glass body to exhaust in the exhausting cavity at the preset exhausting temperature and the preset vacuum degree for more than 120 minutes. The present invention can allow the gas molecules trapped in the glass body during the melt-forming process to diffuse out from the gaps between the molecular structures of the glass body itself without causing annealing of the glass body, thereby preventing the gas molecules inside the glass body from being released into the vacuum layer of the vacuum glass during subsequent use and affecting the vacuum degree of the vacuum layer.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum glass manufacturing, and in particular to an exhaust method and device for a glass body, and a vacuum glass and a manufacturing method thereof. Background Art

[0002] Vacuum glass is made by sealing the edges of two pieces of glass, then extracting the gas in the vacuum layer between the two pieces of glass and sealing it. During the manufacturing of the glass body, many tiny bubbles and dissolved gases will be trapped in the glass body during the melting and molding process of float glass. These gases are affected by the raw materials, furnace gas properties and pressure, and melting temperature in the production process of float glass. The amount of gas in the glass is also different. Common gases include H2O, H2, N2, O2, CO, CO2, H2S, etc.

[0003] The inventors have found that these gases are the source of outgassing in the vacuum layer after the vacuum glass is sealed. Vacuum glass is a vacuum device with a large surface area and a small volume. 2 The inner volume of the vacuum glass is only the size of a ping-pong ball. The gas released slowly over a long period of time has a great influence on the vacuum degree of the vacuum layer of the vacuum glass. Summary of the invention

[0004] The purpose of the present invention is to provide a glass body exhaust method and device, vacuum glass and its manufacturing method, so as to solve the technical problem that the prior art fails to exhaust the gas trapped in the glass body, causing the gas to be slowly released into the vacuum layer of the vacuum glass during subsequent use, thereby affecting the subsequent vacuum quality of the vacuum glass.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a method for exhausting a glass body, comprising the following steps: placing one or more melt-formed glass bodies in an exhaust cavity; heating the exhaust cavity to a preset exhaust temperature, wherein the preset exhaust temperature is greater than 250° C. and less than 380° C.; evacuating the exhaust cavity to a preset vacuum degree; and controlling the glass body to be exhausted in the exhaust cavity at the preset exhaust temperature and the preset vacuum degree for more than 120 minutes.

[0007] In an embodiment of the present invention, heating the exhaust chamber to a preset exhaust temperature includes: heating the exhaust chamber from its initial temperature to the preset exhaust temperature in a step-by-step manner; wherein each step includes a heating stage and a constant temperature stage, the preset heating time range of the heating stage is 20 minutes to 40 minutes, and the preset constant temperature time range of the constant temperature stage is 10 minutes to 20 minutes.

[0008] In an embodiment of the present invention, the step-by-step heating of the exhaust chamber from its initial temperature to the preset exhaust temperature includes the following steps: within a preset heating time range, heating the exhaust chamber from the initial temperature to 120°C; within a preset constant temperature time range, maintaining the temperature of the exhaust chamber at 120°C; within a preset heating time range, heating the temperature of the exhaust chamber from 120°C to 240°C; within a preset constant temperature time range, maintaining the temperature of the exhaust chamber at 240°C; within a preset heating time range, heating the temperature of the exhaust chamber from 240°C to the preset exhaust temperature.

[0009] In an embodiment of the present invention, evacuating the exhaust chamber to a preset vacuum degree comprises: heating the exhaust chamber to a preset exhaust temperature and maintaining the temperature within a preset insulation time range, and then evacuating the exhaust chamber from normal pressure to the preset vacuum degree; wherein the preset insulation time range is 20 minutes to 40 minutes.

[0010] In an embodiment of the present invention, the glass body is exhausted in the exhaust cavity where the preset exhaust temperature is 310° C.±10° C. and the preset vacuum degree is 1 Kpa to 3 Kpa for 450 minutes to 510 minutes.

[0011] In an embodiment of the present invention, after the exhaust of the glass body is completed, the following steps are also included: within a preset cooling time range, the exhaust chamber is cooled from the preset exhaust temperature to 30°C±5°C; wherein the preset cooling time range is 20 minutes to 40 minutes; and the exhaust chamber is pressurized from the preset vacuum degree to normal pressure.

[0012] The present invention also provides an exhaust device for a glass body, which uses the above-mentioned exhaust method to exhaust the glass body. The exhaust device includes: a heating furnace, which is provided with an exhaust cavity and a heating structure; a vacuum structure, which is connected to the exhaust cavity; and a temperature control structure, which is electrically connected to the heating structure, and the temperature control structure is used to control the heating structure to heat the exhaust cavity.

[0013] In an embodiment of the present invention, a material rack is accommodated in the exhaust cavity, and a plurality of sheets of the glass body after being melted and formed can be placed on the material rack in an arranged manner at intervals.

[0014] In an embodiment of the present invention, the heating furnace includes a furnace body, an inner box and a support frame, the inner box is mounted in the furnace body through the support frame, the heating structure includes heating wires laid on the outer wall of the inner box, and the inner cavity of the inner box constitutes the exhaust cavity.

[0015] In an embodiment of the present invention, the heating furnace is provided with at least one internal circulation structure, and the internal circulation structure includes a circulation impeller and a motor, and the circulation impeller is connected to the output shaft of the motor and extends into the exhaust chamber.

[0016] The present invention also provides a method for manufacturing vacuum glass, comprising the following steps: preparing two glass bodies that have been evacuated by the above-mentioned exhaust method; tightly pressing the two glass bodies together, and impacting the peripheral parts of the two glass bodies with high-energy plasma generated by a cold laser to melt the peripheral parts of the glass bodies; evacuating the vacuum layer between the two glass bodies through the exhaust hole on one of the glass bodies, and sealing the exhaust hole with a sealing sheet.

[0017] The present invention also provides a vacuum glass, which is manufactured by adopting the manufacturing method of the vacuum glass.

[0018] The characteristics and advantages of the present invention are:

[0019] The exhaust method and device for the glass body of the present invention, by placing the glass body in an exhaust cavity, and evacuating the exhaust cavity with a temperature of more than 250°C and not more than 380°C, allows the gas molecules trapped in the glass body during the melting and forming process to diffuse out from the gaps between the molecular structures of the glass body itself and then be exhausted out of the exhaust cavity without causing annealing of the glass body. Therefore, the present invention can prevent the gas molecules inside the glass body from being released into the vacuum layer of the vacuum glass during subsequent use and affecting the vacuum degree of the vacuum layer.

[0020] The vacuum glass and the manufacturing method thereof of the present invention adopt an exhaust method to discharge the gas trapped inside the two glass bodies, and then high-energy plasma generated by a cold laser strikes the peripheral parts of the two glass bodies to fuse the peripheral parts of the glass bodies, thereby realizing cold sealing of the two glass bodies. There is no need to perform edge sealing by high-temperature sintering, so that the two glass bodies will not be annealed during the edge sealing process, thereby producing fully tempered vacuum glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a flow chart of the exhaust method in the present invention.

[0023] Figure 2It is a curve diagram of the temperature and pressure changes of the exhaust chamber in the present invention.

[0024] Figure 3 It is a front view of the exhaust device of the present invention (door open state).

[0025] Figure 4 It is a schematic diagram of the structure of the vacuum glass in the present invention.

[0026] Figure 5 It is a three-dimensional diagram of the exhaust device in the present invention (door open state).

[0027] Figure 6 It is a partial cross-sectional view of the back side of the exhaust device in the present invention.

[0028] Figure 7 It is a partial cross-sectional view of the side of the exhaust device in the present invention.

[0029] In the figure:

[0030] 1. Glass body; 11. Peripheral parts; 2. Solder layer; 3. Sealing piece; 4. Heating furnace; 41. Furnace body; 411. Furnace door; 412. Sealing ring; 413. Lock; 414. Handle; 415. Load-bearing base; 42. Heating structure; 421. Heating furnace wire; 43. Inner box; 431. Exhaust chamber; 44. Heat insulation cover; 45. Internal circulation structure; 451. Circulating impeller; 452. Motor; 46. Material rack; 47. Support frame; 471. Support beam; 472. Reinforcement beam; 5. Control cabinet; 51. Temperature control structure; 52. Vacuuming structure; 521. Vacuum pump; 522. Exhaust pipe; 53. Touch screen; 54. Power switch; 55. Status indicator light; 56. Cold water tank. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Implementation Method 1

[0033] like Figure 1 , Figure 2 as well as Figure 3As shown, the present invention provides a method for exhausting a glass body 1, comprising the following steps: placing one or more pieces of melt-formed glass bodies 1 in an exhaust cavity 431; heating the exhaust cavity 431 to a preset exhaust temperature, which is above 250°C and not more than 380°C; evacuating the exhaust cavity 431 to a preset vacuum degree; and controlling the exhaust of the glass body 1 in the exhaust cavity 431 at the preset exhaust temperature and the preset vacuum degree for more than 120 minutes. Among them, most of the gas molecules exhausted from the glass body 1 are H2O, and some include gas molecules such as H2, N2, O2, CO, CO2, and H2S. Therefore, by detecting the hydroxyl (-OH) content in the exhaust glass body 1, the exhaust effect can be judged, that is, the lower the hydroxyl content in the exhaust glass body 1, the better the exhaust effect.

[0034] The exhaust method of the glass body 1 of the present invention is to place the glass body 1 in the exhaust cavity 431, evacuate the exhaust cavity 431 and keep the temperature of the exhaust cavity 431 above 250°C and not more than 380°C, so that the gas molecules trapped in the glass body 1 during the melting process can diffuse out from the gaps between the molecular structures of the glass body 1 itself without causing annealing of the glass body 1, and then be exhausted out of the exhaust cavity 431. In addition, batch exhaust of multiple glass bodies 1 can be achieved, and the exhaust efficiency is high.

[0035] Therefore, combined with Figure 4 As shown, the glass body 1 after exhausting by the exhaust method of the present invention is particularly suitable for manufacturing vacuum glass, by pressing two glass bodies 1 tightly together and sealing the two glass bodies 1, that is, fusing the peripheral parts 11 of the two glass bodies 1, so that a vacuum layer to be evacuated is formed between the two glass bodies 1, and then the vacuum layer is evacuated through the exhaust hole provided on one glass body 1 in conjunction with the vacuum glass sealing device, and the sealing sheet 3 is welded and sealed at the exhaust hole through the solder layer 2, so that the exhaust hole is sealed. Since the gas molecules trapped inside the glass body 1 are exhausted and will not be slowly released into the vacuum layer during the subsequent use of the vacuum glass, the vacuum degree of the vacuum layer of the vacuum glass is prevented from decreasing during the subsequent use, thereby ensuring the stability of the performance of the vacuum glass.

[0036] It should be noted that in the prior art, the edge sealing of two glass bodies in vacuum glass is performed by sandwiching an edge sealing material (usually a mixture of low-melting glass powder and adhesive) between the peripheral parts 11 of the two glass bodies, and the edge sealing material is melted and sintered at a high temperature of 400°C to 550°C to seal and connect the peripheral parts 11 of the two glass bodies. The inventors found that although part of the gas trapped inside the glass body 1 will also be affected by the high temperature and diffuse out from the gaps between the molecular structures of the glass body 1 itself during the edge sealing sintering process, the exhaust effect is not ideal due to the short edge sealing sintering time, and part of the gas is still trapped inside the glass body 1 and is not discharged in time. If the edge sealing sintering time is increased, the effect of edge sealing sintering will be affected.

[0037] In addition, the inventors have also discovered that, regardless of whether the glass body 1 after melting and forming is physically tempered glass or chemically tempered glass, edge sealing by sintering and using the high temperature during the edge sealing process to expel the gas molecules trapped inside the glass body 1 will cause the glass body 1 to anneal, thereby making it impossible to manufacture fully tempered vacuum glass made of two fully tempered glass bodies 1. Therefore, vacuum glass is manufactured by using two glass bodies 1 that have been exhausted by the exhaust method of the present invention. There is no need to use the high temperature in the sintering and edge sealing process to exhaust the inside of the glass body 1, so that the edge sealing of the two glass bodies can be carried out at room temperature. The high-energy plasma generated by the cold laser hits the peripheral parts 11 of the two glass bodies 1, so that the peripheral parts 11 of the glass bodies 1 are melted. After the cold laser completes a certain number of welds on the peripheral parts 11 of the two glass bodies 1, an airtight edge-sealed glass structure is formed between the two glass bodies 1 at the welds due to the melting, thereby avoiding annealing of the tempered glass body 1, and manufacturing a fully tempered vacuum glass made of two fully tempered glass bodies 1. In addition, the whole process does not require the use of edge sealing materials or organic glue, and the formed airtight edge-sealed glass structure itself is a part of the glass body 1, so it has the same good airtightness and durability as the glass body 1.

[0038] Specifically, the specific time for exhausting the glass body 1 in the exhaust chamber 431 at the preset exhaust temperature and the preset vacuum degree can be adjusted according to the specific preset exhaust temperature and the preset vacuum degree, and it should be ensured that the gas molecules in the glass body 1 can diffuse out smoothly and have a faster exhaust speed, and it should also be ensured that the exhaust is sufficient, that is, most of the gas molecules can diffuse out. In order to achieve better exhaust effect and exhaust speed, the present invention provides a preferred embodiment in which the preset exhaust temperature is 310℃±10℃, the preset vacuum degree is 1Kpa~3Kpa, and the exhaust time is 450 minutes to 510 minutes. It has good reliability, can ensure that the glass body 1 will not anneal and is fully exhausted, and has low cost and high exhaust efficiency. More preferably, the preset exhaust temperature is 310℃, the preset vacuum degree is 1Kpa, and the exhaust time is 480 minutes.

[0039] The present invention also provides some preferred embodiments with a preset vacuum degree of 1Kpa, a preset exhaust temperature of 250°C, and an exhaust time of 720 minutes; or a preset exhaust temperature of 300°C, and an exhaust time of 480 minutes; or a preset exhaust temperature of 260°C, and an exhaust time of 660 minutes; or a preset exhaust temperature of 270°C, and an exhaust time of 600 minutes; or a preset exhaust temperature of 280°C, and an exhaust time of 540 minutes; or a preset exhaust temperature of 290°C, and an exhaust time of 480 minutes; or a preset exhaust temperature of 300°C, The exhaust time is 420 minutes; or the preset exhaust temperature is 320℃, the exhaust time is 360 minutes; or the preset exhaust temperature is 330℃, the exhaust time is 300 minutes; or the preset exhaust temperature is 340℃, the exhaust time is 240 minutes; or the preset exhaust temperature is 350℃, the exhaust time is 180 minutes; or the preset exhaust temperature is 360℃, the exhaust time is 120 minutes; or the preset exhaust temperature is 370℃, the exhaust time is 120 minutes; or the preset exhaust temperature is 380℃, the exhaust time is 120 minutes.

[0040] like Figure 2As shown, in an embodiment of the present invention, the exhaust cavity 431 is heated to a preset exhaust temperature, including: the exhaust cavity 431 is heated from its initial temperature to the preset exhaust temperature in a step-by-step manner. By heating the exhaust cavity 431 in a step-by-step manner, it is avoided that the vacuum glass of the glass body 1 placed inside is easily broken due to excessive heating. Specifically, each step includes a heating stage and a constant temperature stage, and the preset heating time range of the heating stage is 20 minutes to 40 minutes, and the preset constant temperature time range of the constant temperature stage is 10 minutes to 20 minutes. By heating to the temperature of the next gradient within the preset heating time range of 20 minutes to 40 minutes, and maintaining the temperature for 10 minutes to 20 minutes after reaching the temperature, it is ensured that the glass body 1 is heated slowly and the temperature distribution is uniform to avoid rupture, and the constant temperature holding time and heating time are avoided to be too long, resulting in low heating efficiency. Among them, the preset heating time range is preferably 30 minutes, and the preset constant temperature time range is preferably 15 minutes.

[0041] Specifically, the exhaust chamber 431 is heated from its initial temperature to a preset exhaust temperature in a stepwise manner, including the following steps: within a preset heating time range, the exhaust chamber 431 is heated from the initial temperature to 120°C; within a preset constant temperature time range, the temperature of the exhaust chamber 431 is maintained at 120°C; within a preset heating time range, the temperature of the exhaust chamber 431 is heated from 120°C to 240°C; within a preset constant temperature time range, the temperature of the exhaust chamber 431 is maintained at 240°C; within a preset heating time range, the temperature of the exhaust chamber 431 is heated from 240°C to the preset exhaust temperature. In the embodiment of the present invention, the initial temperature of the exhaust chamber 431 is room temperature, that is, 25°C.

[0042] like Figure 2 As shown, in the embodiment of the present invention, the exhaust chamber 431 is evacuated to a preset vacuum degree, including: after the exhaust chamber 431 is heated to a preset exhaust temperature and maintained within a preset insulation time range, the exhaust chamber 431 is evacuated from normal pressure to a preset vacuum degree; wherein the preset insulation time range is 20 minutes to 40 minutes. That is to say, after the exhaust chamber 431 is heated to a preset exhaust temperature and maintained for 20 minutes to 40 minutes, the exhaust chamber 431 is evacuated to a preset vacuum degree for exhaust, so that the gas molecules inside the glass body 1 first form a relatively active state at the preset exhaust temperature, and then can be quickly extracted under the action of vacuuming.

[0043] like Figure 2As shown, after the exhaust of the glass body 1 is completed, the following steps are also included: within the preset cooling time range, the exhaust chamber 431 is cooled from the preset exhaust temperature to 30°C ± 5°C; wherein, the preset cooling time range is 20 minutes to 40 minutes, so as to avoid the glass body 1 from being broken due to excessive cooling; the exhaust chamber 431 is pressurized from a preset vacuum degree to normal pressure; wherein, the pressure can be reduced at the same time as the temperature starts to drop, or it can be reduced to a preset temperature (for example, 240°C) before being reduced. Due to the temperature reduction, the gas in the exhaust chamber 431 will not penetrate into the glass body 1 that has been exhausted.

[0044] like Figure 2 As shown, in the embodiment of the present invention, the temperature change of the exhaust chamber 431 forms seven temperature states, the first temperature state S1 is about 30 minutes, and the temperature is increased from 25°C to 120°C; the second temperature state S2 maintains 120°C and heats for about 15 minutes; the third temperature state S3 is about 30 minutes, and the temperature is increased from 120°C to 240°C; the fourth temperature state S4 maintains 240°C and heats for about 15 minutes; the fifth temperature state S5 is about 30 minutes, and the temperature is increased from 240°C to 310°C; the sixth temperature state S6 maintains 310°C and heats for about 510 minutes; the seventh temperature state S7 is about 30 minutes, and the temperature drops from 310°C to 30°C.

[0045] like Figure 2 As shown, the pressure change of the exhaust chamber 431 forms five pressure states. The first pressure state P1 lasts for about 150 minutes, and the pressure is 110Kpa, that is, normal pressure. When the fifth temperature state S5 is maintained for 30 minutes, the exhaust chamber 431 enters the second pressure state P2, and the pressure is reduced from normal pressure to 1Kpa in 15 minutes; then it enters the third pressure state P3, and the pressure is maintained at 1Kpa for about 480 minutes. At the end of the fifth temperature state S5, the third pressure state P3 ends, and the exhaust chamber 431 enters the fourth pressure state P4, and the pressure is increased from 1Kpa to normal pressure in 15 minutes; finally, it enters the fifth pressure state P5 and maintains normal pressure.

[0046] Implementation Method 2

[0047] Figure 5 As shown, the present invention also provides an exhaust device for a glass body 1, comprising: a heating furnace 4, which is provided with an exhaust chamber 431 and a heating structure 42; a vacuum structure 52, which is connected to the exhaust chamber 431; a temperature control structure 51, which is electrically connected to the heating structure 42, and the temperature control structure 51 is used to control the heating structure 42 to heat the exhaust chamber 431. The exhaust device of this embodiment adopts the exhaust method of embodiment one to exhaust the glass body 1. The working principle and beneficial effects of the exhaust device of this embodiment are the same as those of the exhaust method of embodiment one, which will not be repeated here. Among them, Figure 3As shown, the exhaust cavity 431 contains a material rack 46 , and the multiple glass bodies 1 after melting and forming can be placed on the material rack 46 in an intermittently arranged manner.

[0048] like Figure 5 and Figure 6 As shown, the heating furnace 4 includes a furnace body 41, an inner box 43 and a support frame 47. The inner box 43 is mounted in the furnace body 41 through the support frame 47. The heating structure 42 includes a heating wire 421 laid on the outer wall of the inner box 43. The inner cavity of the inner box 43 constitutes an exhaust cavity 431.

[0049] Specifically, the outer cover of the inner box 43 is provided with a heat insulation cover 44, and the gap between the heat insulation cover 44 and the inner cavity can also be filled with heat insulation materials, so as to play a heat insulation role. A furnace door 411 is provided on one side of the furnace body 41, and an opening is provided on the side of the inner box 43 corresponding to the furnace door 411, and a sealing ring 412 is provided around the opening. When the furnace door 411 is closed, the furnace door 411 and the sealed inner side surface are provided with a sealing connection with the sealing ring 412, so that the inner cavity of the inner box 43 forms a closed exhaust cavity 431. The furnace door 411 is provided with a handle 414 for operating the furnace door 411 to open and close, and a lock 413 for locking and fixing the closed furnace door 411 to the furnace body 41. The outer top surface, outer bottom surface and two outer side surfaces of the inner box 43 are all paved with heating furnace wires 421. The support frame 47 includes multiple horizontally arranged reinforcing beams 472 and vertically arranged multiple supporting beams 471. A movable load-bearing base 415 is provided at the bottom of the exhaust device. The furnace body 41 is supported on the load-bearing base 415. Multiple reinforcing beams 472 are fixed on the outer wall of the inner box 43. Multiple supporting beams 471 are fixed on the load-bearing base and connected to the multiple reinforcing beams 472.

[0050] like Figure 3 and Figure 6As shown, in the embodiment of the present invention, the heating furnace 4 is provided with at least one internal circulation structure 45, and the internal circulation structure 45 includes a circulation impeller 451 and a motor 452. The circulation impeller 451 is connected to the output shaft of the motor 452 and extends into the exhaust chamber 431. In the process of the exhaust chamber 431 heating up to the preset exhaust temperature and in the process of the exhaust chamber 431 reaching the preset exhaust temperature and the vacuum pumping structure 52 not yet evacuating the exhaust chamber 431 to the preset vacuum degree, the circulation impeller 451 is driven to rotate by the motor 452, so that the circulation impeller 451 disturbs the heated gas in the exhaust chamber 431, thereby facilitating the glass body 1 in the exhaust chamber 431 to be heated more evenly under the action of the hot air flow. In addition, after exhausting, the exhaust chamber 431 starts to cool down and the vacuum pumping structure 52 stops vacuuming, so that the external gas gradually enters the exhaust chamber 431. In the process of the pressure of the exhaust chamber 431 rising to normal pressure, the circulation impeller 451 is driven to rotate by the motor 452, so that the circulation impeller 451 disturbs the gas in the exhaust chamber 431, which is conducive to more uniform cooling of the glass body 1 in the exhaust chamber 431 under the action of the airflow. Specifically, the motor 452 is installed on the outer wall surface of the inner box 43. The circulation impeller 451 is connected to the output shaft of the motor 452 through a coupling installed on the inner box 43.

[0051] like Figure 3 As shown, a control cabinet 5 is installed on the side of the heating furnace 4, and a temperature control structure 51 is arranged on the control cabinet 5. The control cabinet 5 is also provided with a touch screen 53, a power switch 54 and a status indicator light 55, wherein the touch screen 53 can be used to set temperature parameters, pressure parameters and time parameters, and can also be used to display the temperature change curve and pressure change curve in the exhaust chamber 431; the status indicator light 55 can indicate different temperature states and / or different pressure states by switching lights of different colors, and can also indicate different temperature states and / or different pressure states by setting multiple separate indications.

[0052] like Figure 7 As shown, the vacuum pumping structure 52 includes a vacuum pump 521 and an exhaust pipe 522 connecting the vacuum pump 521 and the exhaust chamber 431. The exhaust pipe 522 has an air inlet connected to the outside atmosphere, and the air inlet is installed with a solenoid valve. Before the vacuum pump 521 is started to evacuate the exhaust chamber 431, the solenoid valve is controlled to be closed. After the exhaust is completed, the vacuum pump 521 is closed and the solenoid valve is opened, so that the outside gas enters the exhaust chamber 431, and the pressure of the exhaust chamber 431 is increased to normal pressure. Specifically, the vacuum pumping structure 52 is installed in the control cabinet 5, and the control cabinet 5 also contains a cold water tank 56. The outside of the exhaust pipe 522 and the outside of the motor 452 are provided with cooling pipelines connected to the cold water tank 56, so that the gas extracted from the exhaust pipe 522 is cooled before entering the vacuum pump 521 and cooling the motor 452.

[0053] Implementation Method 3

[0054] like Figure 4 As shown, the present invention also provides a method for manufacturing vacuum glass, comprising the following steps: preparing two glass bodies 1 that have been evacuated by the above-mentioned evacuation method; tightly pressing the two glass bodies 1 together, and impacting the peripheral parts 11 of the two glass bodies 1 with high-energy plasma generated by a cold laser to melt the peripheral parts 11 of the glass bodies 1; evacuating the vacuum layer between the two glass bodies 1 through the evacuation hole on one glass body 1, and sealing the evacuation hole with a sealing sheet 3.

[0055] The manufacturing method of the vacuum glass of the present invention adopts an exhaust method to discharge the gas trapped inside the two glass bodies 1, and then the high-energy plasma generated by the cold laser hits the peripheral parts 11 of the two glass bodies 1 to fuse the peripheral parts 11 of the glass bodies 1, thereby realizing the cold sealing of the two glass bodies 1. There is no need to perform edge sealing through high-temperature sintering, so that the two glass bodies 1 will not be annealed during the edge sealing process, so that fully tempered vacuum glass can be produced.

[0056] Implementation Method 4

[0057] like Figure 4 As shown, the present invention also provides a vacuum glass, which is made by the manufacturing method of the vacuum glass in the third embodiment. The vacuum glass of the present invention will not cause the vacuum degree to decrease due to the diffusion of gas inside the glass body 1 into the vacuum layer during subsequent use, so the performance is stable, and no annealing occurs due to high temperature during the edge sealing process, and the strength is higher. In addition, the edge-sealed glass structure formed by the fusion of the two glass bodies 1 is itself a part of the glass body 1, so it has the same good airtightness and durability as the glass body 1.

[0058] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A method for exhausting a glass body, characterized in that: The following steps are involved: Placing one or more melt-formed glass bodies in the exhaust cavity; Raising the temperature of the exhaust chamber to a preset exhaust temperature, wherein the preset exhaust temperature is above 250° C. and does not exceed 380° C.; Evacuate the exhaust chamber to a preset vacuum degree; Controlling the glass body to be exhausted in the exhaust cavity at the preset exhaust temperature and the preset vacuum degree for more than 120 minutes; The glass body is exhausted in the exhaust cavity where the preset exhaust temperature is 310° C.±10° C. and the preset vacuum degree is 1 kPa to 3 kPa for 450 minutes to 510 minutes.

2. The exhaust method of a glass body according to claim 1, characterized in that: Heating the exhaust chamber to a preset exhaust temperature includes: heating the exhaust chamber from its initial temperature to the preset exhaust temperature in a step-by-step manner; wherein each step includes a heating stage and a constant temperature stage, the preset heating time range of the heating stage is 20 minutes to 40 minutes, and the preset constant temperature time range of the constant temperature stage is 10 minutes to 20 minutes.

3. The exhaust method of the glass body according to claim 2, characterized in that: The step of heating the exhaust chamber from its initial temperature to the preset exhaust temperature in a stepwise manner comprises the following steps: Within a preset temperature increase time range, raising the exhaust chamber temperature from the initial temperature to 120° C.; Within a preset constant temperature time range, maintaining the temperature of the exhaust chamber at 120° C.; In the preset heating time range, the temperature of the exhaust chamber is increased from 120° C. to 240° C.; Within a preset constant temperature time range, maintaining the temperature of the exhaust chamber at 240° C.; Within a preset temperature rise time range, the temperature of the exhaust chamber is raised from 240° C. to the preset exhaust temperature.

4. The exhaust method of a glass body according to claim 1, characterized in that: The step of evacuating the exhaust chamber to a preset vacuum degree comprises: heating the exhaust chamber to a preset exhaust temperature and maintaining the temperature within a preset insulation time range, and then evacuating the exhaust chamber from normal pressure to the preset vacuum degree; wherein the preset insulation time range is 20 minutes to 40 minutes; and increasing the pressure of the exhaust chamber from the preset vacuum degree to normal pressure.

5. The exhaust method of a glass body according to claim 1, characterized in that: After the exhaust of the glass body is completed, The following steps are involved: Within a preset cooling time range, the exhaust chamber is cooled from the preset exhaust temperature to 30°C±5°C; wherein the preset cooling time range is 20 minutes to 40 minutes.

6. A method for manufacturing vacuum glass, characterized in that: The following steps are involved: Prepare two glass bodies that have been vented by the venting method described in any one of claims 1 to 5; The two glass bodies are tightly pressed together, and the peripheral parts of the two glass bodies are impacted by high-energy plasma generated by cold laser, so that the peripheral parts of the glass bodies are welded; The vacuum layer between the two glass bodies is evacuated through the evacuation hole on one of the glass bodies, and the evacuation hole is sealed by a sealing sheet.

7. A vacuum glass, characterized in that: The vacuum glass is manufactured by the method for manufacturing the vacuum glass according to claim 6.

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