A hollow coated heated glass capable of uniform heating

Abstract

The present invention provides a hollow coated heated glass that can be evenly heated, comprising a first substrate and a second substrate spaced apart, a spacer bar being provided between the first and second substrates, the spacer bar dividing the cavity between the first and second substrates into a first cavity and a second cavity; and further comprising a coated heating assembly, the coated heating assembly being located in the first cavity or the second cavity, the coated heating assembly comprising a joint, a busbar, and a transparent conductive film arranged in sequence from top to bottom, the transparent conductive film being fixed to the second substrate. The hollow coated heated glass that can be evenly heated created by the present invention can effectively reduce the contact resistance between the metal slurry and the copper foil, greatly reduce the hot spots of the busbar, and solve the problem of uneven heat caused by overheating of the busbar; and effectively avoid oxidation of the film layer, improve product reliability, and achieve even heating.

Description

Technical Field

[0001] The invention belongs to the field of coated heated glass, and in particular relates to a hollow coated heated glass that can be heated evenly. Background Art

[0002] Currently, many companies are researching coated heated glass, but most utilize a sandwich structure to achieve this. This type of glass consists of a single pane of glass bonded to another pane via a transparent plastic such as polyvinyl butyral (PVB). A conductive film is applied to one of the panes. The conductive film is typically produced using vacuum magnetron sputtering and is also known as an offline Low-E film.

[0003] Typically, when a conductive film is combined with PVB, the color of the film will vary significantly due to refraction, making it difficult to control the stability of product batches and unsuitable for multi-batch production. Therefore, the best solution is to use a hollow structure that can achieve heating function while ensuring color stability.

[0004] However, in the existing technology, most busbar structures only use silver paste materials. In actual applications, the resistance of the silver paste cannot match the resistance of the film layer, resulting in severe heating of the busbar, generating "hot spots" and even seriously affecting the heating effect of the product.

[0005] In addition, in actual applications, Low-E conductive film and pure silver paste are exposed to the air for a long time, which can easily cause oxidation and lose the conductive heating ability. Even a slight contact will have an adverse effect on the heating effect. Summary of the Invention

[0006] In view of this, the present invention aims to propose a hollow coated heated glass that can be heated evenly, which can effectively reduce the contact resistance between the metal slurry and the copper foil, greatly reduce the hot spots of the busbar, and solve the problem of uneven heat caused by overheating of the busbar; and effectively avoid the oxidation of the film layer, improve the reliability of the product, and achieve uniform heating.

[0007] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0008] A hollow coated heated glass that can be heated evenly includes a first substrate and a second substrate arranged at intervals, a spacer bar is provided between the first substrate and the second substrate, and the spacer bar divides the cavity between the first substrate and the second substrate into a first cavity and a second cavity; it also includes a coated heating component, which is located in the first cavity or the second cavity. The coated heating component includes a joint, a busbar, and a transparent conductive film arranged in sequence from top to bottom, and the transparent conductive film is fixed to the second substrate.

[0009] The setting of the coating heating component can effectively reduce the contact resistance between the metal slurry and the copper foil, greatly reduce the hot spots of the busbar, and solve the problem of uneven heat caused by overheating of the busbar; it also effectively avoids the oxidation of the film layer, improves the reliability of the product, and achieves uniform heating.

[0010] Furthermore, the coated heating component is located in the second cavity, the busbar includes a copper foil and a metal slurry layer arranged above and below, the metal slurry layer is fixed to the transparent conductive film, and the copper foil is fixed to the joint.

[0011] Furthermore, the horizontal distance between the metal slurry layer and the inner wall of the second cavity away from the spacer bar is not less than 6-9 mm, and the horizontal distance between the metal slurry layer and the outer wall of the second cavity close to the spacer bar is not more than 3-6 mm.

[0012] Furthermore, the horizontal distance between the metal slurry layer and the inner wall of the second cavity away from the spacer strip cannot be too close, otherwise leakage will occur; or trace oxygen and water in the external air will enter the second cavity, causing the metal conductive film to be oxidized and destroy the film layer.

[0013] Furthermore, the ratio of the width of the copper foil to the width of the metal slurry layer is less than 0.95:1; and the ratio of the length of the copper foil to the length of the metal slurry layer is less than 1:1.

[0014] Furthermore, the coated heating component is located in the first cavity, the busbar is at least one of a metal slurry layer, a metal foil strip, and a metal foil strip with conductive glue, the width of the busbar is 2-20 mm, and the vertical distance between the top of the busbar and the top of the spacer strip is 0-10 mm.

[0015] Furthermore, the connector includes a metal electrode and a wire, and an outer wall of the wire is provided with an insulating layer.

[0016] Furthermore, when the coating heating component is located in the first cavity, holes are provided inside or around the spacer bar for accommodating the wires of the connector to pass through.

[0017] Furthermore, the holes of the spacer strips are sealed by sealant, which is one of butyl sealant and structural sealant.

[0018] Furthermore, the top of the spacer bar is fixed to the first substrate through a top butyl rubber layer, and the bottom of the spacer bar is fixed to the transparent conductive film or the second substrate through a bottom butyl rubber layer. The bottom butyl rubber layer is spaced apart from the coated heating component or the bottom butyl rubber layer fully / partially covers the coated heating component.

[0019] When the bottom butyl rubber layer completely covers the coated heating component, the bottom butyl rubber layer can further protect the coated heating component and prevent the metal conductive film from being oxidized and causing damage to the film layer.

[0020] Furthermore, it also includes at least one temperature sensor, which is located in the first cavity or the second cavity.

[0021] The heating effect can be monitored in real time through a temperature sensor, and the heating time and given power can be controlled according to the temperature through an external control system to further control the heating temperature to be uniform, which is suitable for mass production.

[0022] Furthermore, the transparent conductive film is one of an off-line conductive film and an on-line conductive film, and the area of ​​the transparent conductive film is smaller than the area of ​​the second substrate.

[0023] Furthermore, the second cavity is filled with structural adhesive, an edge sealing layer is provided at one end of the second cavity away from the spacer bar, and a shielding layer is provided on an outer wall of the second substrate and / or the first substrate.

[0024] The edge sealing layer is formed by an edge sealing agent and is used to prevent oxygen or moisture in the external air from penetrating into the structural adhesive.

[0025] The masking layer is used to cover the metal slurry layer, copper foil and joints to increase the aesthetics of the product. The masking coating includes but is not limited to colored glaze, primer, adhesive stickers, etc.

[0026] Furthermore, there is transparent conductive adhesive on the bottom of the copper foil, and the copper foil is fixed to the metal paste layer through the transparent conductive adhesive. The coverage area of ​​the transparent conductive adhesive is greater than one third of the contact area between the copper foil and the metal paste layer.

[0027] The coverage area of ​​the transparent conductive adhesive is larger than one-third of the contact area between the copper foil and the metal paste layer, so as to ensure that the copper foil and the metal paste layer are firmly fixed and the transparent conductive adhesive will not overflow.

[0028] Furthermore, the copper foil may be connected to the metal slurry layer by welding.

[0029] The metal paste layer is a layered structure formed by pure silver paste or silver paste doped with at least one metal selected from the group consisting of gold, platinum, copper, nickel, stainless steel, tin, and aluminum.

[0030] The first cavity is filled with at least one gas selected from argon, krypton and nitrogen, and the oxygen content in the first cavity is less than 1%.

[0031] Furthermore, the spacer strips are made of a material selected from the group consisting of metal materials, organic composite materials, and polymer metal composite materials.

[0032] Furthermore, the joint and the busbar are connected by welding using metal tin.

[0033] Compared with the prior art, the hollow coated heated glass that can be evenly heated created by the present invention has the following advantages:

[0034] (1) The hollow coated heated glass capable of uniform heating created by the present invention can effectively reduce the contact resistance between the metal slurry and the copper foil, greatly reduce the hot spots of the busbar, and solve the problem of uneven heat caused by overheating of the busbar; and effectively avoid the oxidation of the film layer, improve the reliability of the product, and achieve uniform heating.

[0035] (2) The hollow coated heated glass that can be evenly heated created by the present invention can monitor the heating effect in real time through a temperature sensor, and can also control the heating time and given power according to the temperature through an external control system to further control the heating temperature to be uniform, which is suitable for mass production.

[0036] (3) The present invention creates the hollow coated heated glass that can be heated uniformly. By changing the position of the coated heating component in the hollow glass, the oxidation of the film layer is effectively avoided, which can greatly increase the service life of the product and make the product more reliable.

[0037] (4) The hollow coated heated glass that can be evenly heated created by the present invention adopts a hollow structure, which can realize the heating function and ensure the stability of color, and is suitable for multi-batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 A schematic diagram of the coating heating assembly according to an embodiment of the present invention being located in the second cavity;

[0040] Figure 2 This is a schematic diagram of a bottom butyl rubber layer covering a film-coated heating component according to an embodiment of the present invention;

[0041] Figure 3 A top view of the coating heating assembly in the second cavity as described in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the coating heating component according to an embodiment of the present invention being located in the first cavity;

[0043] Figure 5 A top view of the coating heating assembly in the first cavity as described in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the locations of the five center points described in the embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1-first substrate; 2-second substrate; 3-spacer; 31-top butyl rubber layer; 32-bottom butyl rubber layer; 4-first cavity; 5-second cavity; 6-coating heating component; 61-connector; 62-busbar; 621-copper foil; 622-metal slurry layer; 63-transparent conductive film; 7-edge sealing layer; 8-temperature sensor; 9-structural adhesive; 10-shielding layer; 11-center point 1; 12-center point 2; 13-center point 3; 14-center point 4; 15-center point 5. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components. Unless otherwise clearly specified and limited, the term "fixed connection" can be commonly used fixed connection methods such as plug-in, welding, threaded connection, and bolt connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0051] Example 1

[0052] A hollow coated heated glass that can be heated uniformly includes a first substrate 1 and a second substrate 2 arranged at intervals, a spacer bar 3 is provided between the first substrate 1 and the second substrate 2, and the spacer bar 3 divides the cavity between the first substrate 1 and the second substrate 2 into a first cavity 4 and a second cavity 5; it also includes a coated heating component 6, which is located in the first cavity 4 or the second cavity 5. The coated heating component 6 includes a joint 61, a busbar 62, and a transparent conductive film 63 arranged in sequence from top to bottom, and the transparent conductive film 63 is fixed to the second substrate 2.

[0053] The coated heating assembly 6 is located in the second cavity 5 . The busbar 62 includes a fixedly connected metal slurry layer 622 and a copper foil 621 . The metal slurry layer 622 is fixed to the transparent conductive film 63 , and the copper foil 621 is fixed to the connector 61 .

[0054] The horizontal distance between the metal slurry layer 622 and the inner wall of the second cavity 5 away from the spacer bar 3 is 10 mm, and the horizontal distance between the metal slurry layer 622 and the outer wall of the second cavity 5 close to the spacer bar 3 is 2 mm.

[0055] The ratio of the width of the copper foil 621 to the width of the metal paste layer 622 is 0.9:1; and the ratio of the length of the copper foil 621 to the length of the metal paste layer 622 is 0.8:1.

[0056] The top of the spacer bar 3 is fixed to the first substrate 1 through the top butyl rubber layer 31, and the bottom of the spacer bar 3 is fixed to the transparent conductive film 63 through the bottom butyl rubber layer 32. The bottom butyl rubber layer 32 is spaced apart from the coating heating component 6.

[0057] A temperature sensor 8 is also included. The temperature sensor 8 is located in the first cavity 4 , the temperature sensor 8 is located on the top of the copper foil 621 , and the temperature sensor 8 is spaced apart from the joint 61 .

[0058] The transparent conductive film 63 is an offline Low-E film, the second cavity 5 is filled with structural adhesive 9, the end of the second cavity 5 away from the spacer 3 is provided with an edge sealing layer 7, and the outer wall of the second substrate 2 and / or the first substrate 1 is provided with a shielding layer 10.

[0059] Example 2

[0060] A hollow coated heated glass that can be heated uniformly includes a first substrate 1 and a second substrate 2 arranged at intervals, a spacer bar 3 is provided between the first substrate 1 and the second substrate 2, and the spacer bar 3 divides the cavity between the first substrate 1 and the second substrate 2 into a first cavity 4 and a second cavity 5; it also includes a coated heating component 6, which is located in the first cavity 4 or the second cavity 5. The coated heating component 6 includes a joint 61, a busbar 62, and a transparent conductive film 63 arranged in sequence from top to bottom, and the transparent conductive film 63 is fixed to the second substrate 2.

[0061] The coated heating assembly 6 is located in the second cavity 5 . The busbar 62 includes a fixedly connected metal slurry layer 622 and a copper foil 621 . The metal slurry layer 622 is fixed to the transparent conductive film 63 , and the copper foil 621 is fixed to the connector 61 .

[0062] The horizontal distance between the metal slurry layer 622 and the inner wall of the second cavity 5 away from the spacer bar 3 is 10 mm, and the horizontal distance between the metal slurry layer 622 and the outer wall of the second cavity 5 close to the spacer bar 3 is 2 mm.

[0063] The ratio of the width of the copper foil 621 to the width of the metal paste layer 622 is 0.9:1; and the ratio of the length of the copper foil 621 to the length of the metal paste layer 622 is 0.8:1.

[0064] The top of the spacer bar 3 is fixed to the first substrate 1 through the top butyl rubber layer 31 , and the bottom of the spacer bar 3 is fixed to the transparent conductive film 63 through the bottom butyl rubber layer 32 . The bottom butyl rubber layer 32 completely covers the coated heating component 6 .

[0065] A temperature sensor 8 is also included. The temperature sensor 8 is located in the first cavity 4 , the temperature sensor 8 is located on the top of the copper foil 621 , and the temperature sensor 8 is spaced apart from the joint 61 .

[0066] The transparent conductive film 63 is an offline Low-E film, the second cavity 5 is filled with structural adhesive 9, the end of the second cavity 5 away from the spacer 3 is provided with an edge sealing layer 7, and the outer wall of the second substrate 2 and / or the first substrate 1 is provided with a shielding layer 10.

[0067] Example 3

[0068] A hollow coated heated glass that can be heated uniformly includes a first substrate 1 and a second substrate 2 arranged at intervals, a spacer bar 3 is provided between the first substrate 1 and the second substrate 2, and the spacer bar 3 divides the cavity between the first substrate 1 and the second substrate 2 into a first cavity 4 and a second cavity 5; it also includes a coated heating component 6, which is located in the first cavity 4 or the second cavity 5. The coated heating component 6 includes a joint 61, a busbar 62, and a transparent conductive film 63 arranged in sequence from top to bottom, and the transparent conductive film 63 is fixed to the second substrate 2.

[0069] The coated heating component 6 is located in the first cavity 4, and the busbar 62 is at least one of a metal slurry layer 622, a metal foil strip, and a metal foil strip with conductive glue. The width of the busbar 62 is 15 mm, and the vertical distance between the top of the busbar 62 and the top of the spacer bar 3 is 6 mm.

[0070] The connector 61 includes a metal electrode and a wire. The outer wall of the wire is provided with an insulating layer. The spacer bar 3 is provided with a hole for the wire to pass through.

[0071] The top of the spacer bar 3 is fixed to the first substrate 1 through the top butyl rubber layer 31, and the bottom of the spacer bar 3 is fixed to the transparent conductive film 63 or the second substrate 2 through the bottom butyl rubber layer 32. The bottom butyl rubber layer 32 is spaced apart from the coating heating component 6.

[0072] It also includes at least one temperature sensor 8 , which is located in the first cavity 4 .

[0073] The transparent conductive film 63 is an offline conductive film, and the area of ​​the transparent conductive film 63 is smaller than the area of ​​the second substrate 2 .

[0074] The second cavity 5 is filled with structural adhesive 9 , an edge sealing layer 7 is provided at one end of the second cavity 5 away from the spacer bar 3 , and a shielding layer 10 is provided on the outer wall of the second substrate 2 and / or the first substrate 1 .

[0075] Comparative Example 1

[0076] A hollow coated heated glass that can be heated uniformly includes a first substrate 1 and a second substrate 2 arranged at intervals, a spacer bar 3 is provided between the first substrate 1 and the second substrate 2, and the spacer bar 3 divides the cavity between the first substrate 1 and the second substrate 2 into a first cavity 4 and a second cavity 5; it also includes a coated heating component 6, which is located in the first cavity 4 or the second cavity 5. The coated heating component 6 includes a joint 61, a busbar 62, and a transparent conductive film 63 arranged in sequence from top to bottom, and the transparent conductive film 63 is fixed to the second substrate 2.

[0077] The coated heating assembly 6 is located in the second cavity 5 . The busbar 62 includes a fixedly connected metal slurry layer 622 and a copper foil 621 . The metal slurry layer 622 is fixed to the transparent conductive film 63 , and the copper foil 621 is fixed to the connector 61 .

[0078] The horizontal distance between the metal slurry layer 622 and the inner wall of the second cavity 5 away from the spacer bar 3 is 2 mm, and the horizontal distance between the metal slurry layer 622 and the outer wall of the second cavity 5 close to the spacer bar 3 is 10 mm.

[0079] The ratio of the width of the copper foil 621 to the width of the metal paste layer 622 is 0.9:1; and the ratio of the length of the copper foil 621 to the length of the metal paste layer 622 is 0.8:1.

[0080] The top of the spacer bar 3 is fixed to the first substrate 1 through the top butyl rubber layer 31, and the bottom of the spacer bar 3 is fixed to the transparent conductive film 63 through the bottom butyl rubber layer 32. The bottom butyl rubber layer 32 is spaced apart from the coating heating component 6.

[0081] A temperature sensor 8 is also included. The temperature sensor 8 is located in the first cavity 4 , the temperature sensor 8 is located on the top of the copper foil 621 , and the temperature sensor 8 is spaced apart from the joint 61 .

[0082] The transparent conductive film 63 is an offline Low-E film, the second cavity 5 is filled with structural adhesive 9, the end of the second cavity 5 away from the spacer 3 is provided with an edge sealing layer 7, and the outer wall of the second substrate 2 and / or the first substrate 1 is provided with a shielding layer 10.

[0083] Comparative Example 2

[0084] No coating heating assembly 6 is provided in the first cavity 4 and the second cavity 5 . A transparent conductive film and a busbar are provided on the top of the second substrate 2 in sequence. The busbar is made of silver paste material.

[0085] The water vapor sealing durability test was conducted on the hollow coated heated glass of Examples 1-3 and Comparative Examples 1-2, which was specifically divided into two stages:

[0086] Stage 1: 56 cycles, one cycle every 12 hours, temperature from -18℃±2℃ to 53℃±1℃, heating rate of 14℃ / h±2℃ / h;

[0087] In the second stage, the temperature is maintained at 58℃±1℃ and the relative humidity is greater than 95% for 49 days.

[0088] Before and after the test, the hollow coated heated glass of Examples 1-3 and Comparative Examples 1-2 was powered by a DC stabilized power supply, and the surface temperature of the glass was monitored by a thermal imager, as shown in Table 1 and Table 2. The positions of the five center points for monitoring the temperature were as follows: Figure 6 shown.

[0089] Among them, relevant test parameters such as voltage, power-on time and ambient temperature before and after the test can be considered the same. Specifically: input voltage 24V±0.1V, power-on time 20 minutes, ambient temperature 23℃±1℃, thermal imager 4m away from the substrate, and film surface resistance 7Ω.

[0090] Table 1 Temperature measurement results before the test

[0091]

[0092] Table 2 Temperature measurement results after the test

[0093]

[0094] From the data in the table above, it can be seen that the butyl rubber in Example 2 completely covers the busbar, and there is no significant difference in heat distribution before and after the water vapor seal durability test;

[0095] After the water-vapor seal durability test, the busbar temperature of Example 1 increased significantly, while the center point temperature also decreased. This indicates that in the second cavity, covering the outer edge of the busbar with butyl rubber is beneficial to the protection of the membrane layer and can extend the life of the product.

[0096] The coated heating component of Example 3 is located in the first cavity. Its temperature distribution does not change significantly before and after the water vapor sealing durability test. The film layer of the coated heating component located in the first cavity is not easily damaged.

[0097] The metal slurry layer of Comparative Example 1 was closer to the edge of the substrate, and its busbar and center point temperatures changed to varying degrees before and after the water vapor seal durability test. The busbar temperature increased, while the center point temperature decreased. The changes were more significant than those before and after the water vapor seal durability test of Example 1. Compared with Example 1, the metal slurry layer was closer to the edge of the substrate and was more susceptible to oxidation.

[0098] Comparative Example 2 is characterized in that the copper foil structure is removed from the busbar structure. Before the water vapor sealing durability test, the temperatures of the upper and lower busbars have already shown obvious hot spots, and the center point temperature has also dropped accordingly, and even the deicing and defrosting effect of -18°C cannot be achieved.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hollow coated heated glass capable of uniform heating, characterized by: The invention comprises a first substrate (1) and a second substrate (2) arranged at intervals, wherein a spacer bar (3) is provided between the first substrate (1) and the second substrate (2), and the spacer bar (3) divides the cavity between the first substrate (1) and the second substrate (2) into a first cavity (4) and a second cavity (5); and further comprises a coating heating assembly (6), wherein the coating heating assembly (6) comprises a joint (61), a busbar (62), and a transparent conductive film (63) arranged in sequence from top to bottom, and the transparent conductive film (63) is fixed to the second substrate (2); The film-coated heating assembly (6) is located in the second cavity (5); the busbar (62) comprises a copper foil (621) and a metal slurry layer (622) arranged above and below; the metal slurry layer (622) is fixed to the transparent conductive film (63); and the copper foil (621) is fixed to the joint (61); It also includes at least one temperature sensor (8), the temperature sensor (8) is located in the second cavity (5); Wherein, the hollow coated heated glass capable of being evenly heated can control the heating time according to the temperature; The ratio of the width of the copper foil (621) to the width of the metal slurry layer (622) is less than 0.95:1; the ratio of the length of the copper foil (621) to the length of the metal slurry layer (622) is less than 1:1; The coating heating component (6) is located in the first cavity (4); The top of the spacer bar (3) is fixed to the first substrate (1) via a top butyl rubber layer (31), and the bottom of the spacer bar (3) is fixed to the transparent conductive film (63) or the second substrate (2) via a bottom butyl rubber layer (32), wherein the bottom butyl rubber layer (32) completely covers the coating heating component (6); An edge sealing layer (7) is provided at one end of the second cavity (5) away from the spacer strip (3).

2. The uniformly heated hollow coated heated glass according to claim 1, characterized in that: The horizontal distance between the metal slurry layer (622) and the inner wall of the second cavity (5) away from the spacer bar (3) is not less than 6-9 mm, and the horizontal distance between the metal slurry layer (622) and the outer wall of the spacer bar (3) close to the second cavity (5) is not more than 3-6 mm.

3. The uniformly heated hollow coated heated glass according to claim 1, characterized in that: The joint (61) comprises a metal electrode and a conductor, and the outer wall of the conductor is provided with an insulating layer.

4. The uniformly heated hollow coated heated glass according to claim 1, characterized in that: The transparent conductive film (63) is one of an off-line conductive film and an on-line conductive film, and the area of ​​the transparent conductive film (63) is smaller than the area of ​​the second substrate (2).

5. The uniformly heated hollow coated heated glass according to claim 1, characterized in that: The second cavity (5) is filled with structural adhesive (9), and the outer wall of the second substrate (2) and / or the first substrate (1) is provided with a shielding layer (10).

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