CN113754314A

CN113754314A - Composite function's sight glass

Info

Publication number: CN113754314A
Application number: CN202111188231.6A
Authority: CN
Inventors: 林江
Original assignee: Haojing Holding Group Co Ltd
Current assignee: Haojing Holding Group Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2021-12-07

Abstract

The invention relates to the technical field of glass preparation, in particular to landscape glass with a composite function, which comprises an indoor sheet and an outdoor sheet, wherein the indoor sheet and the outdoor sheet are separated by a spacer bar to form a hollow sealed space, the indoor sheet is made of antireflection glass, the outdoor sheet is made of low-radiation energy-saving glass, and the sealed space between the indoor sheet and the outdoor sheet is filled with gas.

Description

Composite function's sight glass

Technical Field

The invention relates to the technical field of glass preparation, in particular to landscape glass with composite functions.

Background

With the progress of society, people have higher and higher requirements on the comfort of buildings. The large-size viewing glass has gained more and more applications, particularly in the occasions of night view appreciation around urban high-rise buildings or famous scenic spots, because of the capability of providing people to enjoy various external scenes almost without visual limitation indoors. The current glass in general has some problems or deficiencies in these viewing applications. Firstly, the visible light internal reflection of the common 6-12-6 double-layer hollow glass is up to more than 14%, and the reflectivity can easily reflect indoor light to cause light pollution of observed scenes, particularly the phenomenon is more obvious when the night scenes are observed, and the observation experience is obviously reduced. Compared with a wall body, glass is a weak link of heat insulation in a building. At present, the building energy consumption of China accounts for 30% of the total social energy consumption, the glass doors and windows account for about 50% of the building energy consumption, and the national and social limits on the building energy consumption are more and more strict in order to achieve the aims of carbon peak reaching and carbon neutralization in China. The landscape glass has larger contribution to building energy consumption due to the huge size, and thus, higher requirements are put forward on the energy-saving function of the glass. Meanwhile, due to the large size of landscape glass, in order to ensure the safety of the landscape glass, the state has a mandatory regulation, and the landscape glass is required to be made into safety glass through thermal processing (tempering and interlayer). The photo-thermal selection ratio (visible light transmittance/sunlight factor) of the high-transmittance energy-saving glass with the thermal processing capability in the current market is less than 2, so that the energy-saving requirement of large-size building glass is difficult to meet. Therefore, there is a strong need for a thermally processable glass window system with high visible light transmission, minimal internal reflection, and a photothermal selectivity ratio greater than 2 to meet the requirements of large size viewing glass.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a viewing glass with composite functions, which simultaneously achieves the effects of high visible light transmittance, low internal reflection, high purity of transmitted color, high energy saving and heat-resistant processing under the condition of satisfying a large-sized viewing field, and is particularly suitable for night-view viewing places, and the technical scheme adopted by the present invention is as follows:

the utility model provides a complex function's sight glass, includes indoor piece and outdoor piece, separate and form hollow confined space through the space stop between indoor piece and the outdoor piece, indoor piece is for subtracting reflection glass, outdoor piece is the energy-conserving glass of low radiation, the confined space intussuseption is filled with insulating gas.

Preferably, the antireflection glass comprises substrate glass and an antireflection film layer group, wherein five film layers are compounded on the antireflection film layer group from one side close to the substrate glass to the outside in sequence, and the first layer is Zn₂SnO₄Layer, the second layer is SiO₂Layer, the third layer is Zn₂SnO₄Layer, the fourth layer is SiO₂Layer of ZrO fifth layer₂Layer(s)

Preferably, the low-radiation energy-saving glass comprises substrate glass and a three-silver low-radiation film group, wherein seventeen film layers are compounded from one side close to the substrate glass to the outside in sequence by the three-silver low-radiation film group, and the first layer isSi₃N₄Or Zn₂SnO₄The second layer is a ZnO or AZO layer, the third layer is an Ag layer, the fourth layer is a TiAl alloy layer, the fifth layer is a ZnO or AZO layer, and the sixth layer is Si₃N₄Or Zn₂SnO₄The seventh layer is a ZnO or AZO layer, and the eighth layer is an Ag layer; the ninth layer is a TiAl alloy layer, the tenth layer is a ZnO or AZO layer, and the eleventh layer is Si₃N₄Or Zn₂SnO₄The twelfth layer is a ZnO or AZO layer, the thirteenth layer is an Ag layer, the fourteenth layer is a TiAl alloy layer, the fifteenth layer is a ZnO or AZO layer, and the sixteenth layer is Si₃N₄Or Zn₂SnO₄Layer of the seventeenth layer is ZrO₂And (3) a layer.

Preferably, two sides of the substrate glass of the indoor sheet are provided with antireflection film layer sets.

Preferably, the three-silver low-emissivity film layer group is arranged on one side of the outdoor substrate glass, which is close to the indoor space.

Preferably, the thickness of the first layer of the antireflection film layer set is 20-40nm, the thickness of the second layer is 5-30nm, the thickness of the third layer is 50-100nm, the thickness of the fourth layer is 70-100nm, and the thickness of the fifth layer is 0.5-5 nm.

Preferably, the thickness of the first layer of the three-silver low-emissivity film layer group is 20-40nm, the thickness of the second layer is 8-20nm, the thickness of the third layer is 10-20nm, the thickness of the fourth layer is 0.3-2.5nm, the thickness of the fifth layer is 8-20nm, the thickness of the sixth layer is 40-80nm, the thickness of the seventh layer is 8-20nm, the thickness of the eighth layer is 10-20nm, the thickness of the ninth layer is 0.3-2.5nm, the thickness of the tenth layer is 8-20nm, the thickness of the eleventh layer is 40-80nm, the thickness of the twelfth layer is 8-20nm, the thickness of the tenth layer is 10-20nm, the thickness of the fourteenth layer is 0.3-2.5nm, the thickness of the fifteenth layer is 8-20nm, the thickness of the sixteenth layer is 15-40nm, and the thickness of the seventeenth layer is 0.5-5 nm.

Preferably, the weight fraction of Al in the TiAl alloy layer is 0-30%.

Preferably, the film layers are all prepared by a large-area vacuum magnetron coating technology, wherein the oxide layer or the nitride layer is coated on Ar/O₂And Ar/N₂Under the atmosphereSputtering to form SiO in the anti-reflection film layer₂Layer Ar/O₂The pressure of the atmosphere being at least 10^- ⁴Pa。

Preferably, the insulating gas is air, argon, krypton or a mixture thereof.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the composite-function landscape glass provided by the invention, the outdoor sheet is plated with the three-silver low-radiation film group set, and through the ingenious film system design, the high transmittance of visible light, the low reflectance of a film-coated surface and other excellent characteristics are realized, and meanwhile, higher sun-shading performance and lower indoor reflectance are obtained, so that the composite-function landscape glass has a remarkable energy-saving significance.

2. The indoor sheet of the viewing glass with the composite function is plated with the antireflection film group, the viewing glass is made of multiple layers of nano-level dielectric materials which can resist high temperature and mechanical abrasion, and high transparency and low reflection of visible light are realized through precise control of dielectric properties and thickness.

3. The composite-function landscape glass provided by the invention has the advantages that the special material selection, matching and process realization of the film layers on the indoor sheet and the outdoor sheet are realized, the coated glass is ensured not to be damaged in the subsequent glass processing operations of cutting, edging, toughening, interlayer, hollow laminating and the like, larger glass size can be obtained, and the landscape requirement can be better met.

In conclusion, the night scene ornament has the advantages of ingenious design and novel structure, is suitable for night scene watching places, and has remarkable popularization significance.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the construction of an outdoor sheet of the present invention;

FIG. 3 is a schematic view of the construction of the indoor sheet of the present invention;

FIG. 4 is a transmission and indoor and outdoor reflectance spectra of an example monolithic glass system of the present invention;

in the figure: 1 is the integral glass system of the invention, 2 and 3 are substrate glass, 5 is an antireflection film layer group, 4 is a three-silver low-radiation film layer group, 6 is a spacing bar, 7 is heat preservation gas, 11 is Si₃N₄Or Zn₂SnO₄A layer 12 is a ZnO or AZO layer, and a layer 13 is an Ag layer; 14 is TiAl alloy layer, 15 is ZnO or AZO layer, 16 is Si₃N₄Or Zn₂SnO₄ Layer 17 is ZnO or AZO layer, 18 is Ag layer; 19 is TiAl alloy layer, 20 is ZnO or AZO layer, 21 is Si₃N₄Or Zn₂SnO₄Layer, 22 is ZnO or AZO layer, 23 is Ag layer; 24 is TiAl alloy layer, 25 is ZnO or AZO layer, 26 is Si₃N₄Or Zn₂SnO₄ Layer 27 of ZrO₂Layer, 31, 36 is Zn₂SnO₄Layers, 32, 37 being SiO₂Layers, 33, 38 being Zn₂SnO₄Layers, 34, 39 being SiO₂Layer, 35, 40 layers are ZrO₂And (3) a layer.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Referring to fig. 1 to 3, the present embodiment provides a viewing glass with composite functions, including an indoor sheet and an outdoor sheet, the indoor sheet and the outdoor sheet are separated by a spacer 4 to form a hollow sealed space, the indoor sheet is antireflection glass, the outdoor sheet is low-radiation energy-saving glass, the present embodiment utilizes high-performance energy-saving glass and antireflection glass to combine to realize the function of the viewing glass, so that the viewing glass has the technical effects of high visible light transmittance, low internal reflection, high color transmittance, high purity, and high energy saving, a heat preservation gas 7 is filled between the indoor sheet and the outdoor sheet to meet the indoor heat preservation requirement, as a preferred embodiment, in a part of embodiments of the present invention, the heat preservation gas 7 may be dry air, argon, krypton, or a mixed gas thereof, the spacer 6 may be bridge-cut-off aluminum, stainless steel, or a super spacer with super thermal insulation, the spacer 6 may have a thickness of 6-16 mm.

Preferably, in some embodiments of the present invention, the antireflection glass used includes a substrate glass 3 and an antireflection film group 5, and the antireflection film group 5 is compounded with five film layers from a side close to the substrate glass 3 to an outside in sequence, wherein 31 to 35 are first layers Zn respectively₂SnO₄Layer, the second layer is SiO₂Layer 32, third layerZn₂SnO₄Layer, the fourth layer is SiO₂Layer 34, the fifth layer being ZrO₂And (3) a layer. Si₃N₄Layer and SiO₂The layers are alternately arranged, and the topmost layer is ZrO₂And (7) a layer protection layer. The anti-reflection properties of the film layer 5 are achieved by using high (Zn)₂SnO₄) Low (SiO)₂) The refractive index materials are arranged alternately to achieve coherent subtraction of reflected light from surfaces in a particular wavelength range (visible light to which the invention pertains). This is the usual way to achieve high transmission and low reflection. The invention is particularly added with a fifth layer of ZrO on the basis of using four layers of high-low refractive index materials which are alternately arranged₂And (3) a layer. More multilayer materials can realize the neutrality of better transmission colors in the full visible light range on the basis of realizing the antireflection effect through the adjustment of the film thickness, and the excellent color reducibility can ensure that the viewing glass obtains better observation effect. Meanwhile, since the inner surface of the antireflection glass facing the indoor environment is a part of the indoor environment, the surface needs to be cleaned and contacted periodically, and a common film layer is damaged by frequent touching and cleaning, so that the antireflection performance is reduced or even lost. Top layer of ZrO₂Due to its excellent mechanical wear resistance and chemical weatherability properties, it can provide good protection to the film layer.

Preferably, two sides of the substrate glass 3 of the indoor sheet are provided with the antireflection film layer group 5, and the antireflection glass provided with the two antireflection film layer groups 5 has a better effect. The optimized double-sided antireflection glass can realize the control of the transmitted color within the range of a and b from (-1 to + 1).

Preferably, in some embodiments of the present invention, the low-emissivity energy-saving glass used includes a substrate glass 2 and a silver low-emissivity film group 4, the silver low-emissivity film group 4 is composed of seventeen film layers in sequence from a side close to the substrate glass 2 to the outside, wherein the first layer is Si₃N₄Or Zn₂SnO₄The second layer is a ZnO or AZO layer 12, wherein AZO is aluminum-doped zinc oxide, and the third layer is an Ag layer 13; the fourth layer is a TiAl alloy layer 14, the fifth layer is a ZnO or AZO layer 15, and the sixth layer is Si₃N₄Or Zn₂SnO₄Layer 16 ofThe seven layers are ZnO or AZO layers 17, and the eighth layer is an Ag layer 18; the ninth layer is a TiAl alloy layer 19, the tenth layer is a ZnO or AZO layer 20, and the eleventh layer is Si₃N₄Or Zn₂SnO₄A layer 21, a twelfth layer of ZnO or AZO 22, a thirteenth layer of Ag 23, a fourteenth layer of TiAl alloy 24, a fifteenth layer of ZnO or AZO 25, and a sixteenth layer of Si₃N₄Or Zn₂SnO₄ Layer 26, the seventeenth layer being ZrO₂ Layer 27, in this film system, the third, eighth and thirteenth layers of Ag are functional layers which achieve a low shading coefficient of the coated glass by high reflection of infrared radiation. Therefore, it is desirable to use three layers of Ag to obtain a low shading coefficient and to obtain a visible light transmittance as high as possible. The dielectric material layers of the first layer, the sixth layer, the eleventh layer and the sixteenth layer realize high transmission and low film surface reflection of the whole film system in a visible light range mainly through an electromagnetic wave interference effect. The second, fifth, seventh, tenth, twelfth and fifteenth layers are seed layers of the functional layer, and the main function is to improve the crystalline quality of the thin film of the functional layer by using the lattice matching between the seed layers and the functional layer, so that the functional layer can realize the infrared reflection as high as possible with the lowest possible physical thickness.

In this embodiment, the low-emissivity energy-saving glass comprises a fourth, ninth and fourteenth layer of TiAl alloy layer and a seventeenth layer of ZrO layer, wherein the TiAl alloy is directly deposited on the Ag film during the coating process, so as to protect Ag with a thickness of tens of nanometers from being oxidized and losing the infrared radiation reflection function during the subsequent coating process. Meanwhile, in the hot working process of the whole product, O or water vapor molecules in the external environment of the film and in the film system can diffuse to Ag, but TiAl alloy can preferentially form compact TiAlOx due to the huge negative oxide formation enthalpy (more than-500 KJ/mole O), so that the huge majority of diffused O and water vapor can not reach the Ag layer, the Ag is not damaged at high temperature, and the excellent performance of the Ag is still maintained. Meanwhile, the Ag layer with the nano-scale thickness can be automatically gathered at high temperature easily to form an island structure, so that the functions of high visible light transmission and high infrared reflection are lost, and the TiAl layer with a discontinuous surfaceThe Ox film suppresses such a process by its high mechanical strength. Unlike NiCr published in patent application CN 104961355A, which is used to protect the functional Ag layer, the invention uses TiAl alloy as the sacrificial protective layer, which is one of the keys of the film system to realize the set function. To achieve both high visible light transmission and low solar protection sacrifice, i.e., high photo-thermal selectivity, the entire film system needs to maintain very little absorption of visible light after the glass is cold-heated. NiCr is a highly absorbent material, forming NiCrO even after hot working_xBut also has strong absorption to visible light. The TiAl alloy has larger negative oxidation formation enthalpy than NiCr alloy, and almost all the TiAl alloy is oxidized into transparent TiAlO after hot working_x. The absorption of the residual visible light is far less than that of NiCr, so that the film system can realize higher visible light transmittance.

ZrO is a dielectric material with very high hardness, and the use of ZrO enables the film to be easily subjected to subsequent processing after coating, namely, the film on the glass is kept damaged in subsequent glass transportation, cutting, edging, tempering, interlayer and hollow operations. However, the thick ZrO2 has a large internal stress, and the film is cracked due to stress relaxation in the subsequent heating or long-time storage process, so that the advantages of ZrO are utilized, and the thickness of ZrO cannot be too large, in the embodiment, ZrO is set to be 0.5-5nm, so that the hardness is ensured, and the film is not easy to crack in the processing process, and through the film system design, the low-radiation energy-saving glass in the embodiment can achieve the technical effect that the photothermal selectivity LSG is greater than 2; meanwhile, the coated glass can be processed by heat, which means that the coated glass in the embodiment can be processed into safety glass such as tempered glass or laminated glass, and the requirement of viewing is met while the national relevant legal provisions are met.

Preferably, the three-silver low-radiation film layer group 4 is arranged on one side, close to the indoor, of the outdoor substrate glass 2, and the side is protected by 7 dry air or inert gas, so that the film layer can be prevented from being attacked by severe environments such as outdoor water vapor, acid gas and the like for a long time (more than fifteen years) to damage the low-radiation energy-saving film system, and the viewing and energy-saving effects are influenced.

Preferably, in some embodiments of the present invention, the first layer of the antireflection film layer set has a thickness of 20 to 40nm, the second layer has a thickness of 5 to 30nm, the third layer has a thickness of 50 to 100nm, the fourth layer has a thickness of 70 to 100nm, and the fifth layer has a thickness of 0.5 to 5 nm. By optimizing the material sputtering process and the thickness, the antireflection glass can realize visible light reflectivity of less than 1.5% and neutral transmission color under the condition that antireflection films are plated on two sides of the glass.

Preferably, in some embodiments of the present invention, the thickness of the first layer of the silver triplet low-emissivity film layer group 3 is 20-40nm, the thickness of the second layer is 8-20nm, the thickness of the third layer is 10-20nm, the thickness of the fourth layer is 0.3-2.5nm, the thickness of the fifth layer is 8-20nm, the thickness of the sixth layer is 40-80nm, the thickness of the seventh layer is 8-20nm, the thickness of the eighth layer is 10-20nm, the thickness of the ninth layer is 0.3-2.5nm, the thickness of the tenth layer is 8-20nm, the thickness of the eleventh layer is 40-80nm, the thickness of the twelfth layer is 8-20nm, the thickness of the tenth layer is 10-20nm, the thickness of the fourteenth layer is 0.3-2.5nm, the thickness of the fifteenth layer is 8-20nm, the thickness of the sixteenth layer is 15-40nm, the thickness of the seventeenth layer is 0.5-5 nm.

As a preferable embodiment, the weight fraction of Al in the TiAl alloy layer in this embodiment is preferably 0 to 30%. Since Ti is a metal material with excellent strength-to-weight ratio and corrosion resistance, in a multi-layer Ag film system, Ti is often used as a sacrificial protective layer to protect Ag from being damaged in a high-temperature or oxidizing environment, such as patent ZL 200480014993.2, which uses Ti as a primer film to achieve sacrificial self-protection of the radiation reflective layer from oxidation and decomposition. However, pure Ti has a relatively high strength, so that the processing of a multilayer low-emissivity thin film using pure Ti requires special and delicate processing, which greatly increases the manufacturing cost. The TiAl alloy is adopted to replace pure Ti to further protect the Ag layer from being damaged in the subsequent processing process. The solid solution formed by the TiAl alloy has better strength and compactness. And Al has more negative oxidation formation enthalpy than Ti, so that the oxygen absorption performance of the material can be further improved, and the silver functional layer can be better protected.

As a preferred embodiment, the antireflection film layer in this embodiment has a large areaThe preparation of vacuum magnetic control coating technology, wherein the oxide layer is in Ar/O₂Sputtering under atmosphere to form Ar/O for silicon dioxide layer₂The pressure of the atmosphere being at least 10^-4Pa, in the usual process, the process pressure used for coating is 10^-5Pa, this example is at a particular high pressure (10)^- ⁴Pa,) the film plating under the condition of over-reaction gas proportioning, the minimum absorption of the visible light film and the controllable internal stress of the thick film can be ensured only by the film plating, and the whole performance can still be kept at high temperature, which is one of the keys for realizing the larger size safety of the landscape glass, so the size of the landscape glass with the composite function provided by the invention can be up to 20m multiplied by 3.3m maximally.

One practical example of the invention is as follows:

outdoor piece structure: 6mm white glass \25nm Si₃N₄\10nm AZO\16.2nm Ag\0.5nm TiAl\10nm AZO\54.5nm Zn₂SnO₄\10nm AZO\16nm Ag\0.6nm TiAl\10nm AZO\51.1nm Zn₂SnO₄\10nm AZO\16nm Ag\0.5nm TiAl\10nm AZO\29.1nm Si₃N₄\1.1nm ZrO。

The inner sheet structure: 1nm ZrO₂\92.65nm SiO₂\63.8nm Zn₂SnO₄\21.1nm SiO₂\25.8nm Zn₂SnO₄\6mm white glass \25.8nm Zn₂SnO₄\21.1nm SiO₂\63.8nm Zn₂SnO₄\92.65nm SiO₂\1nm ZrO₂。

The double-layer hollow landscape glass is obtained by cutting, edging, tempering at 640 ℃, hollowing and filling mixed gas of dry air (10%) and argon (90%), and has the following properties:

visible light transmittance Lt: 68 percent;

visible light internal reflectance Rin: 5.2 percent;

visible light external reflectance Rout: 8.3 percent;

shading coefficient SC: 0.365;

thermal insulation coefficient K value: 1.18;

photothermal selectivity LSG: 2.14 of;

the transmission, outdoor reflection and indoor reflection spectra of the double-glazing of this arrangement are shown in fig. 4.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims

1. A viewing glass with composite functions is characterized in that: the solar cell comprises an indoor sheet and an outdoor sheet, wherein the indoor sheet and the outdoor sheet are separated by a spacer bar to form a hollow sealed space, the indoor sheet is made of antireflection glass, the outdoor sheet is made of low-radiation energy-saving glass, and the sealed space is filled with heat-insulating gas.

2. A composite functional viewing glass according to claim 1, wherein: the antireflection glass comprises substrate glass and an antireflection film layer group, wherein five film layers are sequentially compounded from one side close to the substrate glass to the outside through the antireflection film layer group, and the first layer is Zn₂SnO₄Layer, the second layer is SiO₂Layer, the third layer is Zn₂SnO₄Layer, the fourth layer is SiO₂Layer of ZrO fifth layer₂And (3) a layer.

3. A composite functional viewing glass according to claim 1, wherein: the low-radiation energy-saving glass comprises substrate glass and a three-silver low-radiation film group, wherein seventeen film layers are sequentially compounded from one side close to the substrate glass to the outside by the three-silver low-radiation film group, and the first layer is Si₃N₄Or Zn₂SnO₄The second layer is a ZnO or AZO layer, the third layer is an Ag layer, the fourth layer is a TiAl alloy layer, the fifth layer is a ZnO or AZO layer, and the sixth layer is Si₃N₄Or Zn₂SnO₄The seventh layer is ZnO or AZO layer, the eighth layer is Ag layer, the ninth layer is TiAl alloy layer, and the tenth layer is ZnO or AZO layerAZO layer, the tenth layer being Si₃N₄Or Zn₂SnO₄The twelfth layer is a ZnO or AZO layer, the thirteenth layer is an Ag layer, the fourteenth layer is a TiAl alloy layer, the fifteenth layer is a ZnO or AZO layer, and the sixteenth layer is Si₃N₄Or Zn₂SnO₄Layer of the seventeenth layer is ZrO₂And (3) a layer.

4. A composite functional viewing glass according to claim 2, wherein: and two sides of the substrate glass of the indoor sheet are provided with antireflection film layer groups.

5. A composite functional viewing glass according to claim 3, wherein: the three-silver low-radiation film layer group is arranged on one side of the outdoor substrate glass close to the room.

6. A composite functional viewing glass according to claim 2, wherein: the thickness of the first layer of the antireflection film layer set is 20-40nm, the thickness of the second layer is 5-30nm, the thickness of the third layer is 50-100nm, the thickness of the fourth layer is 70-100nm, and the thickness of the fifth layer is 0.5-2 nm.

7. A composite functional viewing glass according to claim 3, wherein: the thickness of the first layer of the three-silver low-radiation film layer set is 20-40nm, the thickness of the second layer is 8-20nm, the thickness of the third layer is 10-20nm, the thickness of the fourth layer is 0.3-2.5nm, the thickness of the fifth layer is 8-20nm, the thickness of the sixth layer is 40-80nm, the thickness of the seventh layer is 8-20nm, the thickness of the eighth layer is 10-20nm, the thickness of the ninth layer is 0.3-2.5nm, the thickness of the tenth layer is 8-20nm, the thickness of the eleventh layer is 40-80nm, the thickness of the twelfth layer is 8-20nm, the thickness of the thirteenth layer is 10-20nm, the thickness of the fourteenth layer is 0.3-2.5nm, the thickness of the fifteenth layer is 8-20nm, the thickness of the sixteenth layer is 15-40nm, and the thickness of the seventeenth layer is 0.5-5 nm.

8. A composite functional viewing glass according to claim 3, wherein: the weight fraction of Al in the TiAl alloy layer is 0-30%.

9. A composite functional viewing glass according to any one of claims 2 to 8, wherein: the film layers are all prepared by a large-area vacuum magnetron coating technology, wherein an oxide layer or a nitride layer is coated on Ar/O₂And Ar/N₂Sputtering under atmosphere to form the SiO in the anti-reflection film layer₂Layer Ar/O₂The pressure of the atmosphere being at least 10^-4Pa。

10. A composite functional viewing glass according to claim 1, wherein: the heat preservation gas is air, argon, krypton or a mixed gas of the air, the argon and the krypton.