CN211972147U

CN211972147U - Semitransparent composite aerogel felt double-layer glass

Info

Publication number: CN211972147U
Application number: CN202020120122.5U
Authority: CN
Inventors: 刘向峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-11-20
Anticipated expiration: 2030-01-19

Abstract

A semitransparent composite aerogel felt double-layer glass relates to the field of building energy conservation. In order to solve the problems that the heat preservation of the existing double-layer glass is difficult to improve, the existing aerogel glass is high in manufacturing cost, the heat preservation is reduced due to the fact that an existing glass component containing the composite aerogel felt is perforated, light is transmitted mainly by virtue of holes, and the semi-transparent characteristic of the composite aerogel felt is not fully exerted for lighting, the invention provides the semi-transparent composite aerogel felt double-layer glass, which comprises the following components: the composite aerogel blanket comprises inner layer transparent glass, outer layer transparent glass, edge spacing strips, a cavity formed by enclosing the inner layer transparent glass, the outer layer transparent glass and the edge spacing strips, a composite aerogel blanket with the thickness of 3-8 mm, an air exhaust hole sealing opening and edge sealing glue. The translucent composite aerogel felt double-layer glass is economical in material, has the light transmission property meeting the lighting requirement of a glass curtain wall, is good in heat preservation and energy saving performance, does not have perforation to cause material loss, and shows the fiber texture effect similar to a paper window in a traditional historic building in a backlight state.

Description

Semitransparent composite aerogel felt double-layer glass

Technical Field

The invention relates to the field of building energy conservation, in particular to semitransparent composite aerogel felt double-layer glass.

Background

The thermal performance of the building transparent envelope structure is generally much worse than that of an opaque wall, so that the energy conservation of a building with a large-area glass curtain wall is difficult to improve. The double-layer hollow glass in the existing energy-saving glass product utilizes an air layer or an inert gas layer generated by filling air or other inert gases into a cavity of the double-layer glass to enhance the heat preservation capability of the glass; the conventional vacuum glass utilizes the double-layer glass sealed cavity for vacuumizing to reduce the convection heat exchange of cavity gas, so that the heat-insulating capacity of the double-layer glass is further improved. However, the air space or inert gas space of the double-layer hollow glass has convection heat transfer, and even completely static air has a heat transfer coefficient of about 0.025W/mK under normal conditions, and is difficult to significantly reduce. The double-layer vacuum glass is only vacuumized by maintaining the low gas content of a certain vacuum degree, and absolute vacuum gas-free can not be achieved, so residual gas convection heat transfer still exists in the interlayer of the double-layer vacuum glass, but the convection heat transfer is obviously reduced; however, the vacuum pumping needs to uniformly arrange micro supports between the inner glass and the outer glass, otherwise, the glass is damaged under the action of the external atmospheric pressure; the arrangement of the micro support increases a heat bridge for heat transfer between double-layer glass, and a thicker vacuum interlayer cannot be used for reducing the influence of residual gas convection, otherwise the micro support is easy to be destabilized and damaged under the action of external atmospheric pressure. The aerogel is a material with excellent heat insulation performance in the existing solid material, has a nano-microporous structure, has a thermal conductivity coefficient of less than 0.013W/mK, is lower than that of a static air layer by 0.025W/mK, has certain transparency, and can be used for transparent heat insulation glass. However, the existing silicon aerogel sheet has high brittleness, and is difficult to be made into a large-area sheet, and large-area aerogel glass can only be made by packaging a plurality of small silicon aerogel sheets, such as the prior art described in the patents of CN209521360U building energy saving glass and CN209508047U transparent heat insulation aerogel glass, and the prior art described in the patent application of CN110576667A hollow light-transmitting plate with a multilayer structure. The prior aerogel glass also utilizes aerogel powder or aerogel particles to fill a double-layer glass cavity to form semitransparent aerogel glass, such as the prior art described in patents of CN209756319U (a unidirectional perspective glass), CN209176484U (a heat insulation and preservation automobile safety glass) and CN208267668U (an antibacterial low-radiation vacuum heat preservation glass). However, the cost of the material per unit volume of the existing aerogel sheet and the rubber powder is too high, which hinders the popularization and application of the high-efficiency energy-saving aerogel glass, especially in buildings with large-area glass curtain walls. To enhance the toughness of aerogel products while reducing manufacturing costs, fiber materials are used in aerogel production processes to form composite aerogel materials, such as composite aerogel blankets based on glass fiber mats. The composite aerogel felt also has good heat insulation performance, the heat conductivity coefficient of the composite aerogel felt can reach 0.018W/mK to 0.019W/mK, the composite aerogel felt is lower than that of static air, the composite aerogel felt can be industrially and continuously produced into large-area aerogel felts, the material cost is greatly reduced compared with that of conventional aerogel sheets or aerogel powder or particles with the same volume, and the composite aerogel felt has the potential of large-area application in buildings. However, at present, the composite aerogel felt material is taken as an opaque building material like thick glass wool felt or asbestos felt, used for the heat preservation of opaque roof boards in opaque building enclosing structures, such as CN209670202U (a special energy-saving and heat-preserving steel structure roof board), CN209603738U (a filled type solid-web heat-preserving aluminum alloy door and window), CN208430952U (an inward opening window with good heat-insulating effect) and CN110242161A (a novel sliding door and window with good heat-insulating property) to form opaque window frames for heat preservation, and heat preservation of a sun-shading curtain aiming at shading in CN108867961A 'an energy-saving and environment-friendly glass wall', or CN209778667U 'a heat insulation glass', wherein the asbestos and ceramic fiber are opaque materials, the glass plate is formed by combining an aerogel felt as a heat insulation interlayer, an opaque asbestos material layer, a ceramic fiber material layer and a flame retardant layer and aims at fire prevention and heat insulation. The existing technical mode of utilizing the composite aerogel felt is to use the composite aerogel felt as an opaque material, the material characteristics that the composite aerogel felt can realize the same heat preservation effect of the opaque heat preservation material with the conventional thickness by virtue of the thinner thickness are ignored, and the thin-layer aerogel felt with the thickness below a certain range has semitransparent optical properties and has the technical potential of being used for natural lighting of a large-area glass curtain wall. But as the thickness increases, the visible light transmission of the composite aerogel blanket rapidly decreases until the visible light transmission decreases to almost zero, and thus can be considered an opaque material. CN208220002U, "a diffusing light-transmitting tile", discloses an idea of using composite aerogel felt as a translucent material for lighting, but does not give full play to the technical potential of using thin-layer composite aerogel felt as a translucent lighting material, and does not use the effective thickness of thin-layer composite aerogel felt for lighting, and cannot realize the applicable visible light transmittance of the translucent glass with composite aerogel felt when applied to a glass curtain wall. In addition, in the patent of CN208220002U, "a diffuse light-transmitting tile", the composite aerogel felt is perforated, and holes of the aerogel felt with a certain perforation rate are used for transmitting light to collect light. The perforated aerogel felt is inevitably subjected to a great deal of loss of the composite aerogel felt thermal insulation material in the production and processing process, the aerogel material is wasted, the thermal insulation of the hole part is reduced a lot, and the thermal insulation of the composite aerogel felt sandwich glass is reduced on the whole.

Disclosure of Invention

The heat preservation performance of the double-layer hollow glass is further improved due to the fact that convection heat transfer exists in an air interlayer or an inert gas interlayer of the existing double-layer hollow glass; the double-layer vacuum glass has to be provided with the micro supports, a heat bridge is generated, and the micro supports are easy to destabilize and damage under the action of external atmospheric pressure when the thickness of a vacuum interlayer is increased; the aerogel sheet in the existing silica aerogel glass has great brittleness, and cannot be made into a large-area sheet, and the silica aerogel sheet or aerogel rubber powder particles in the existing aerogel glass have high material cost per unit volume, so that the made aerogel glass has high manufacturing cost, and cannot be widely applied to buildings with large-area glass curtain walls; the specific technical characteristics of the existing composite aerogel felt laminated glass do not give full play to the technical potential of the thin-layer composite aerogel felt when the thin-layer composite aerogel felt is used as a semitransparent daylighting material, the effective thickness of the thin-layer composite aerogel felt when the thin-layer composite aerogel felt is used for daylighting is not adopted, the applicable visible light transmittance of the semitransparent glass with the composite aerogel felt when the semitransparent glass is applied to a glass curtain wall cannot be realized, main daylighting is mainly carried out by the hole light transmittance of the aerogel felt with a certain perforation rate, the large loss of the composite aerogel felt heat-insulating material cannot be avoided in the production and processing process, the aerogel material is wasted, the heat-insulating property of the hole part is reduced greatly, and the heat-insulating property of the composite aerogel felt laminated glass is reduced on the whole.

In order to achieve the above object, the present invention provides a translucent composite aerogel felt double-layer glass, comprising: the composite aerogel felt comprises inner layer transparent glass, outer layer transparent glass, edge spacing strips, a cavity defined by the inner layer transparent glass, the outer layer transparent glass and the edge spacing strips, a composite aerogel felt with the thickness of 3-8 mm, an air suction hole sealing opening and edge sealing glue; optionally, the edge spacer contains a desiccant; optionally, the inner layer transparent glass is attached to the edge of the edge spacing strip or/and the outer layer transparent glass is attached to the edge of the edge spacing strip and has a chamfer or a slot.

Compared with the existing double-layer hollow glass and vacuum glass, the semitransparent composite aerogel felt double-layer glass has the common characteristics of inner-layer transparent glass, outer-layer transparent glass, edge spacing strips, a cavity formed by the inner-layer transparent glass, the outer-layer transparent glass and the edge spacing strips in a surrounding manner, an air exhaust hole sealing opening and edge sealant; optionally, the edge spacer contains a desiccant; optionally, the inner layer transparent glass is attached to the edge of the edge spacing strip or/and the outer layer transparent glass is attached to the edge of the edge spacing strip and has a chamfer or a slot.

The translucent composite aerogel felt double-layer glass is characterized in that the inner layer transparent glass, the outer layer transparent glass and the edge spacer bars are enclosed into a cavity, the thickness of the composite aerogel felt ranges from 3 millimeters to 8 millimeters, the edges of the composite aerogel felt ranges from 3 millimeters to 8 millimeters are completely attached to the edge spacer bars, and the edge spacer bars and the edge sealant surround and seal the edge spacer bars.

The semitransparent composite aerogel felt double-layer glass is characterized in that after the cavity is pumped, the inner surface and the outer surface of the composite aerogel felt with the thickness of 3 mm to 8 mm are respectively tightly attached to the inner transparent glass and the outer transparent glass, the composite aerogel felt with the thickness of 3 mm to 8 mm has flexible deformation capacity and toughness, the inner transparent glass and the outer transparent glass are fully supported by the flexible liner, and no air space or other gas spaces exist in the cavity, so that no micro support exists.

The semitransparent composite aerogel felt double-layer glass is characterized in that the composite aerogel felt with the thickness of 3 mm to 8 mm is a composite aerogel felt without any perforation, which is prepared by using a fiber felt through a sol-gel process; the semitransparent composite aerogel felt double-layer glass has semitransparent optical characteristics, and the visible light transmittance of the semitransparent composite aerogel felt double-layer glass is 2-11%; the translucent composite aerogel felt double-layer glass can show a fiber texture effect similar to that of a paper window in a traditional historic building in a backlight state.

The beneficial effects of the translucent composite aerogel felt double-layer glass provided by the invention can be realized by the following steps: almost no gas convection heat exchange exists in the vacuumized cavity between the inner transparent glass and the outer transparent glass; the inner transparent glass layer and the outer transparent glass layer are supported by the composite aerogel felt with lower heat conductivity coefficient than static air and flexible deformability and toughness, so that a heat bridge formed by micro supports is not formed in the vacuumized cavity, heat transfer loss can be effectively reduced, and the heat preservation performance is remarkably improved; meanwhile, the translucency of the composite aerogel felt with the thickness of 3 mm to 8 mm can also enable the semitransparent composite aerogel felt double-layer glass to meet the lighting requirement of a large-area glass curtain wall building; the solar radiation transmittance is close to that of some glass with a sun-shading coating, so that the solar radiation heat gain in summer can be effectively reduced; meanwhile, compared with the existing aerogel glass with a silicon aerogel sheet interlayer or an aerogel rubber powder particle interlayer, the material price per unit volume is lower, and the glass is more economical and applicable; meanwhile, compared with the existing glass component with the composite aerogel felt interlayer, the heat preservation performance of the glass component without the composite aerogel felt is reduced, and the glass component has better heat preservation performance than the existing composite aerogel felt interlayer glass; and no waste of perforation loss of aerogel materials is generated in the production process; meanwhile, the fabric texture effect similar to that of a paper window in a traditional historic building can be displayed in a backlight state, and the fabric has certain architectural artistic decoration.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic cross-sectional view of a translucent composite aerogel blanket double glazing according to the present invention.

The parts in the figure are: (11) the air-permeable glass comprises inner transparent glass, (12) outer transparent glass, (13) transparent glass edge chamfer or slot, (2) edge spacing strip, (21) drying agent, (3) cavity, (4) composite aerogel felt with the thickness of 3 mm to 8 mm, (51) air suction hole, (52) air suction hole sealing port and (6) edge sealant.

Detailed Description

The invention is described in detail below with reference to the drawings and the detailed description. While the embodiments and specific embodiments of the present invention are illustrated in the drawings, the present invention should not be construed as limited to the specific embodiments of the illustrated embodiments.

The heat preservation performance of the double-layer hollow glass is further improved due to the fact that convection heat transfer exists in an air interlayer or an inert gas interlayer of the existing double-layer hollow glass; the double-layer vacuum glass has to be provided with a micro support, a heat bridge is generated, and the micro support is unstably damaged under the action of external atmospheric pressure when the thickness of a vacuum interlayer is increased; the transparent silicon aerogel sheet in the existing aerogel glass is very fragile and cannot be made into a large-area sheet, the material cost per unit volume of the silicon aerogel sheet or the aerogel rubber powder particles in the existing aerogel glass is high, the made aerogel glass is high in manufacturing cost, and the transparent silicon aerogel sheet or the aerogel rubber powder particles cannot be widely applied to buildings with large-area glass curtain walls; the specific technical characteristics of the existing composite aerogel felt sandwich glass component do not give full play to the technical potential of the thin-layer composite aerogel felt when the thin-layer composite aerogel felt is used as a semitransparent lighting material, the effective thickness of the thin-layer composite aerogel felt is not adopted, the applicable transmittance of the semitransparent glass with the composite aerogel felt when the semitransparent glass is applied to a glass curtain wall cannot be realized, main lighting is mainly carried out by the light transmission of holes of the aerogel felt with a certain perforation rate, the large loss of the composite aerogel felt heat-insulating material cannot be avoided in the perforation processing process, the aerogel material is wasted, the heat-insulating property of the hole part is reduced a lot, and the heat-insulating property of the composite aerogel felt sandwich glass is reduced on the whole; the semitransparent composite aerogel felt double-layer glass has remarkably improved heat preservation and visible light transmittance suitable for large-area glass curtain walls, can effectively reduce heat gain in summer and heat transfer loss in winter of glass curtain wall buildings, particularly buildings with large-area glass curtain walls, and can be used in the field of building energy conservation.

As shown in fig. 1, the present invention provides a translucent composite aerogel blanket double glazing, comprising: the composite aerogel blanket comprises inner transparent glass 11, outer transparent glass 12, edge spacing strips 2, a cavity 3 defined by the inner transparent glass 11, the outer transparent glass 12 and the edge spacing strips 2, a composite aerogel blanket 4 with the thickness of 3 mm to 8 mm, an air suction hole 51, an air suction hole sealing opening 52 and edge sealant 6; optionally, the edge spacer 2 contains a drying agent 21; optionally, the edge of the inner layer transparent glass 11 adjacent to the edge spacer 2 or/and the edge of the outer layer transparent glass 12 adjacent to the edge spacer 2 have transparent glass edge chamfers or slots 13.

As shown in fig. 1, the translucent composite aerogel felt double-layer glass provided by the invention comprises inner layer transparent glass 11 and outer layer transparent glass 12, wherein the inner wall surface and the outer wall surface of the translucent composite aerogel felt double-layer glass are light-permeable and play a role in supporting the whole glass structure; the edge spacer 2 is made of a material having a certain heat insulating ability, which is impermeable to water and air, and is arranged in a continuous and uninterrupted interval along the edge of the opposite surface between the inner transparent glass 11 and the outer transparent glass 12, and functions to support and maintain a certain interval between the inner transparent glass 11 and the outer transparent glass 12; the cavity 3 is enclosed by the inner transparent glass 11, the outer transparent glass 12 and the edge spacer 2, and can be vacuumized and filled with other materials; optionally, the edge spacer 2 has the desiccant 21 therein, which plays a role of absorbing water vapor permeating into the cavity; optionally, the inner transparent glass 11 is close to the edge of the edge spacer 2 or/and the outer transparent glass 12 is close to the edge of the edge spacer 2, and the edge of the inner transparent glass has a transparent glass edge chamfer or slot 13, after the cavity 3 is vacuumized, a gradually reduced edge opening can be formed by the chamfered edge, or a slot for limiting the movement of the edge spacer 2 is formed, so as to support the edge spacer 2, so as to prevent the edge spacer 2 from sliding into the vacuumized cavity 3 under the action of the external atmospheric pressure.

As shown in fig. 1, the translucent composite aerogel felt double-layer glass provided by the present invention is characterized in that the cavity 3 enclosed by the inner transparent glass 11, the outer transparent glass 12 and the edge spacer 2 has the composite aerogel felt 4 with the thickness of 3 mm to 8 mm, and the edge of the composite aerogel felt 4 with the thickness of 3 mm to 8 mm is completely attached to the edge spacer 2 and is surrounded and sealed by the edge spacer 2 and the edge sealant 6, so that there is no gap between the edge of the composite aerogel felt 4 with the thickness of 3 mm to 8 mm and the edge spacer 2, which is not filled with the composite aerogel felt material and may cause the reduction of the thermal insulation performance.

As shown in fig. 1, the translucent composite aerogel felt double-layer glass provided by the invention is characterized in that after air is exhausted from a cavity 3 of the translucent composite aerogel felt double-layer glass, the inner surface and the outer surface of a composite aerogel felt 4 with the thickness of 3 mm to 8 mm are respectively tightly attached to an inner layer transparent glass 11 and an outer layer transparent glass 12, the composite aerogel felt 4 with the thickness of 3 mm to 8 mm has flexible deformability and toughness, and plays a role of a flexible liner to fully support the inner layer transparent glass 11 and the outer layer transparent glass 12, so that no air space or other gas spaces exist in the cavity 3, no micro-support exists, a thermal bridge between the inner layer transparent glass 11 and the outer layer transparent glass 12 is reduced, and complex processing and installation of the micro-support in the double-layer vacuum glass is avoided, the manufacturing cost can be reduced.

As shown in fig. 1, the translucent composite aerogel felt double-layer glass provided by the invention is characterized in that the composite aerogel felt 4 with the thickness of 3 mm to 8 mm is a composite aerogel felt without any perforation, which is prepared by using a fiber felt through a sol-gel process, and the translucent composite aerogel felt double-layer glass has a translucent optical characteristic, and the visible light transmittance of the translucent composite aerogel felt double-layer glass is 2% to 11%; the possible visible light transmittance of the semitransparent composite aerogel felt double-layer glass is close to that of some gray coated glass, the visible light transmittance of dark coated glass or mirror reflection coated glass, such as gray coated glass, dark coated glass and mirror reflection coated glass with the visible light transmittance of 1.7-11.4%; the semitransparent composite aerogel felt double-layer glass can show the fiber texture similar to that of a paper window in a traditional historic building in a backlight state, has a certain architectural artistic decoration effect, and can be applied to an energy-saving window of a pseudo-classic building.

It should be noted that the above detailed description is illustrative of the present invention and is not intended to limit the scope of the present invention to more embodiments. The above description of specific embodiments of the invention does not exclude the presence of other embodiments in accordance with the principle of the invention, but rather embodiments having the same combination of features as some or all of them, should also be understood to fall within the scope of the invention.

Claims

1. Compared with the existing double-layer hollow glass and vacuum glass, the semitransparent composite aerogel felt double-layer glass is characterized by comprising inner-layer transparent glass, outer-layer transparent glass, edge spacing strips, a cavity formed by the inner-layer transparent glass, the outer-layer transparent glass and the edge spacing strips in a surrounding manner, an air exhaust hole sealing opening and edge sealant; the composite aerogel blanket is characterized in that the composite aerogel blanket with the thickness of 3-8 mm is arranged in the cavity, and the edge of the composite aerogel blanket is completely attached to the edge spacing strip and is surrounded and sealed by the edge spacing strip and the edge sealant.

2. The translucent composite aerogel blanket double-layer glass according to claim 1, wherein the cavity is a vacuum cavity that forms an airless space or other gaseous space after air extraction, and the inner surface and the outer surface of the composite aerogel blanket are respectively adhered to the inner layer transparent glass and the outer layer transparent glass.

3. The translucent composite aerogel blanket double layer glass of claim 1, wherein the composite aerogel blanket is a composite aerogel blanket made from a fiber blanket through a sol-gel process without any perforations; the semitransparent composite aerogel felt double-layer glass has semitransparent optical characteristics, and the visible light transmittance is 2-11%.