Low-radiation glass and glass curtain wall

Abstract

The invention discloses low-emissivity glass and a glass curtain wall, and relates to the technical field of electromagnetic materials, the low-emissivity glass comprises two glass base layers, an air layer and at least one low-emissivity coating, and the two glass base layers are arranged at intervals; the air layer is arranged between the two glass base layers; the low-radiation coating is arranged on the side, facing the air layer, of the glass base layer in a stacked mode, and through grooves connected end to end are formed in the low-radiation coating and used for forming electromagnetic window units; according to the technical scheme, the transmittance of high-frequency electromagnetic signals can be increased.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic materials, and in particular to low-radiation glass and a glass curtain wall. Background Art

[0002] In the related art, low-emissivity glass includes glass and a coating on the surface of the glass, and can achieve high reflection of mid- and far-infrared rays through its coating, so it has excellent heat insulation effect and good light transmittance, and has been widely used in glass curtain walls of modern buildings. However, low-emissivity glass has a significant attenuation effect on high-frequency signals, which will hinder the transmission of high-frequency signals in low-emissivity glass, making it difficult to be used in high-frequency communication applications. Summary of the invention

[0003] The main purpose of the present invention is to provide a low-radiation glass and a glass curtain wall, aiming to increase the transmittance of high-frequency electromagnetic signals.

[0004] To achieve the above object, the low-emissivity glass proposed in the present invention comprises:

[0005] Two glass substrates, the two glass substrates are arranged at an interval;

[0006] an air layer, the air layer being disposed between the two glass substrates; and

[0007] At least one low-emissivity coating is stacked on the side of the glass substrate facing the air layer, and the low-emissivity coating is provided with through grooves connected end to end to form an electromagnetic window unit.

[0008] In one embodiment, the low-emissivity coating includes a plurality of the electromagnetic window units, and the plurality of the electromagnetic window units are arranged in a periodic array.

[0009] In one embodiment, the electromagnetic window unit is arranged in a regular hexagon.

[0010] In one embodiment, the distance between the center points of two adjacent electromagnetic window units is defined as P, and the operating wavelength of the electromagnetic window unit is λ;

[0011] The electromagnetic window unit satisfies the relationship: P≤λ / 15.

[0012] In one embodiment, a duty ratio of the through grooves relative to the low-E coating is less than or equal to 20%.

[0013] In one embodiment, the low-emissivity coating is made of a semiconductor material or a metal material.

[0014] In one embodiment, the process of forming the through-groove is an etching process.

[0015] In one embodiment, the low-emissivity coating has two layers, and the two low-emissivity coatings are respectively disposed on one side of the two glass substrates facing the air layer.

[0016] In one embodiment, the electromagnetic window units of the two low-emissivity coatings are arranged in a one-to-one correspondence in the arrangement direction of the two low-emissivity coatings.

[0017] The present invention further provides a glass curtain wall, comprising any one of the low-emissivity glass described above, wherein the low-emissivity glass comprises:

[0018] Two glass substrates, the two glass substrates are arranged at an interval;

[0019] an air layer, the air layer being disposed between the two glass substrates; and

[0020] At least one low-emissivity coating is stacked on the side of the glass substrate facing the air layer, and the low-emissivity coating is provided with through grooves connected end to end to form an electromagnetic window unit.

[0021] The technical solution of the present invention is to set through grooves on the low-radiation coating of the low-radiation glass, and connect the through grooves end to end to form an electromagnetic window. In this way, when the low-radiation glass transmits high-frequency electromagnetic signals, the electromagnetic window can effectively penetrate the high-frequency electromagnetic signals, thereby improving the transmittance of the low-radiation glass to high-frequency electromagnetic signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of the low-emissivity glass provided by the present invention;

[0024] Figure 2 for Figure 1 Partial structure diagram of medium and low emissivity glass;

[0025] Figure 3 for Figure 1 Another partial structural diagram of medium and low emissivity glass;

[0026] Figure 4 for Figure 1 Simulation results of the transmission amplitude of electromagnetic window units of medium and low emissivity glass;

[0027] Figure 5 for Figure 1 Another transmission amplitude simulation result of the electromagnetic window unit of medium and low-emissivity glass.

[0028] Description of Figure Numbers:

[0029] 100. low-emissivity glass; 10. glass base layer; 20. air layer; 30. low-emissivity coating; 31. through groove; 32. electromagnetic window unit.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. 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] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] In the related art, low-emissivity glass includes glass and a coating on the surface of the glass, and can achieve high reflection of mid- and far-infrared rays through its coating, so it has excellent heat insulation effect and good light transmittance, and has been widely used in glass curtain walls of modern buildings. However, low-emissivity glass has a significant attenuation effect on high-frequency signals, which will hinder the transmission of high-frequency signals in low-emissivity glass, making it difficult to be used in high-frequency communication applications.

[0035] The present invention provides a low-emissivity glass 100 .

[0036] See also Figures 1 to 3 In one embodiment of the present invention, the low-emissivity glass 100 includes:

[0037] Two glass substrates 10, the two glass substrates 10 are arranged at an interval;

[0038] an air layer 20, wherein the air layer 20 is disposed between the two glass substrates 10; and

[0039] At least one low-emissivity coating 30 is laminated on one side of the glass substrate 10 facing the air layer 20, and the low-emissivity coating 30 is provided with through grooves 31 connected end to end to form an electromagnetic window unit 32. In some embodiments, the two glass substrates 10 are laminated at intervals, and both have a thickness of 2.7 mm, a dielectric constant of 3.79, and a loss tangent of 0.0003; the thickness of the air layer 20 is 9 mm; the material of the low-emissivity coating 30 is silver, and the thickness is 0.3 um; the through grooves 31 on the low-emissivity coating 30 are used for high-frequency electromagnetic signals to pass through.

[0040] The material of the low-emissivity coating 30 is not limited to silver. In the embodiment of the present invention, the material of the low-emissivity coating 30 may also be a semiconductor material or other metal material other than silver, which is not limited here. By arranging the low-emissivity coating 30 on one side of the glass substrate 10, the heat insulation performance of the low-emissivity glass 100 can be ensured by the high reflection property of the low-emissivity coating 30 to mid- and far-infrared rays.

[0041] It can be understood that the technical solution of the present invention is to set a through groove 31 on the low-emissivity coating 30 of the low-emissivity glass 100, and connect the through grooves 31 end to end to form an electromagnetic window. In this way, when the low-emissivity glass 100 transmits a high-frequency electromagnetic signal, the electromagnetic window can effectively penetrate the high-frequency electromagnetic signal, thereby improving the transmittance of the low-emissivity glass 100 to the high-frequency electromagnetic signal.

[0042] See also Figure 1 In an embodiment of the present invention, the low-emissivity coating 30 includes a plurality of electromagnetic window units 32, and the plurality of electromagnetic window units 32 are arranged in a periodic array.

[0043] With such configuration, the wave transmission performance of the radiation coating can be further improved by the electromagnetic window units 32 arranged in a periodic array.

[0044] See also Figures 1 to 3In an embodiment of the present invention, the electromagnetic window unit 32 is arranged in a regular hexagonal shape. Specifically, in the electromagnetic window unit 32, the through slot 31 is in a regular hexagonal ring shape. Further, a plurality of through slots 31 in a hexagonal ring shape can be arranged with a common edge to achieve a close arrangement of the electromagnetic window units.

[0045] Of course, the technical solution of the present invention is not limited to this. In some embodiments, the electromagnetic window unit 32 may also be a polygonal structure with a quadrilateral, pentagon, octagon, or other number of sides, or be set to a ring structure other than a polygon, which is not limited here.

[0046] See also Figure 2 In the embodiment of the present invention, the distance between the center points of two adjacent electromagnetic window units 32 is defined as P, and the working wavelength of the electromagnetic window unit 32 is λ;

[0047] The electromagnetic window unit 32 satisfies the relationship: P≤λ / 15.

[0048] With such an arrangement, the electromagnetic window unit 32 can be made into a deep sub-wavelength unit, and can achieve full-space wave transmission stability within the range of an incident angle of 60°.

[0049] In an embodiment of the present invention, a duty ratio of the through slot 31 relative to the low-emissivity coating 30 is less than or equal to 20%.

[0050] In this way, the area of ​​the through groove 31 on the low-emissivity coating 30 can be made not higher than 20% of the total area, and the specific value can be, but is not limited to, 5%, 10%, 15%, 20% and any value less than or equal to 20%. By limiting the duty ratio of the through groove 31 relative to the low-emissivity coating 30, it is possible to avoid the through groove 31 having a large duty ratio and affecting the thermal insulation performance of the low-emissivity glass 100.

[0051] In the embodiment of the present invention, the process of forming the through groove 31 is an etching process.

[0052] See also Figure 1 In an embodiment of the present invention, the low-emissivity coating 30 is provided with two layers, and the two low-emissivity coatings 30 are respectively disposed on one side of the two glass substrates 10 facing the air layer 20 .

[0053] In some embodiments, electromagnetic window units 32 arranged in a periodic array are provided on both low-emissivity coatings 30. By providing two low-emissivity coatings 30, the heat insulation performance of the low-emissivity glass 100 can be further improved; by providing electromagnetic windows on the two low-emissivity coatings 30, the wave transmission performance of the two low-emissivity coatings 30 can be guaranteed respectively.

[0054] Furthermore, in an embodiment of the present invention, the electromagnetic window units 32 of the two low-emissivity coatings 30 are disposed in a one-to-one correspondence in the arrangement direction of the two low-emissivity coatings 30 .

[0055] See also Figure 4 and Figure 5 , Figure 4 and Figure 5 They are respectively the transmission amplitude simulation results of the electromagnetic window unit 32 of the embodiment of the present invention under periodic boundary conditions for incident waves at different angles and different polarizations. The simulation results show that the low-radiation electromagnetic window can support the effective penetration of high-frequency electromagnetic signals in the Ka band, and a transmission bandwidth greater than 2 GHz can be achieved within a range of transmission loss less than 1.5 dB.

[0056] It should be noted that, in the low-emissivity glass 100 of the present invention, the glass substrate 10 is not limited to being set to two layers. For example, the glass substrate 10 can be provided with multiple layers, and the multiple glass substrates 10 can be arranged in pairs to form an air layer 20 between two adjacent glass substrates 10. The low-emissivity coating 30 can be correspondingly provided with multiple layers, and its specific arrangement position can be set according to actual needs and is not limited here.

[0057] Each low-emissivity coating 30 in the low-emissivity glass 100 is provided with an electromagnetic window unit 32. Thus, when the low-emissivity glass 100 transmits a high-frequency electromagnetic signal, the high-frequency electromagnetic signal can sequentially penetrate the electromagnetic window of each low-emissivity coating 30 to ensure the transmittance of the low-emissivity glass 100 to the high-frequency electromagnetic signal.

[0058] The present invention further provides a glass curtain wall, which includes a low-radiation glass 100. The specific structure of the low-radiation glass 100 refers to the above embodiment. Since the glass curtain wall adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0059] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A low-emissivity glass, characterized in that: include: Two glass substrates, the two glass substrates are arranged at an interval; An air layer, the air layer being arranged between the two glass substrates; as well as At least one low-emissivity coating is stacked on one side of the glass substrate facing the air layer, and the low-emissivity coating is provided with end-to-end connected through grooves to form an electromagnetic window unit.

2. The low-emissivity glass according to claim 1, characterized in that: The low-emissivity coating includes a plurality of electromagnetic window units, and the plurality of electromagnetic window units are arranged in a periodic array.

3. The low-emissivity glass according to claim 2, characterized in that: The electromagnetic window unit is arranged in a regular hexagon.

4. The low-emissivity glass according to claim 3, characterized in that: The center point distance between two adjacent electromagnetic window units is defined as P, and the operating wavelength of the electromagnetic window unit is defined as λ; The electromagnetic window unit satisfies the relationship: P≤λ / 15.

5. The low-emissivity glass according to claim 3, characterized in that: The duty ratio of the through grooves relative to the low-emissivity coating is less than or equal to 20%.

6. The low-emissivity glass according to claim 1, wherein: The low-emissivity coating is made of semiconductor material or metal material.

7. The low-emissivity glass according to claim 1, characterized in that: The process of forming the through groove is an etching process.

8. The low-emissivity glass according to any one of claims 1 to 7, characterized in that: The low-emissivity coating has two layers, and the two low-emissivity coatings are respectively arranged on one side of the two glass substrates facing the air layer.

9. The low-emissivity glass according to claim 8, characterized in that: The electromagnetic window units of the two low-emissivity coatings are arranged one-to-one in the arrangement direction of the two low-emissivity coatings.

10. A glass curtain wall, characterized in that: The method comprises the low-emissivity glass according to any one of claims 1 to 9.

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