CN112469155B

CN112469155B - Electric heating glass window

Info

Publication number: CN112469155B
Application number: CN202011381232.8A
Authority: CN
Inventors: 薛从强; 廖慧君; 俞大辉; 吴道远; 李建伟
Original assignee: Fuyao Glass Industry Group Co Ltd
Current assignee: Fuyao Glass Industry Group Co Ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-10-19
Anticipated expiration: 2040-12-01
Also published as: CN112469155A

Abstract

The invention relates to the field of glass products, and particularly provides an electric heating glass window suitable for automobiles, trains or airplanes. The electrical heating glass window comprises a glass plate, a first bus bar, a second bus bar, a plurality of first heating wires, a third bus bar, a fourth bus bar and a plurality of second heating wires, wherein at least one first heating wire penetrates through the third bus bar and the fourth bus bar and is electrically connected with the third bus bar and the fourth bus bar, the first bus bar is connected with the anode of a power supply, and the second bus bar is connected with the cathode of the power supply. The invention can form a plurality of heating areas with different heating power densities, which are at least partially overlapped with each other, realize the step heating and the zone heating, adapt to different heating scenes on automobiles, trains or airplanes, can ensure the defrosting and demisting efficiency and save energy.

Description

Electric heating glass window

The technical field is as follows:

the invention relates to the field of glass products, and particularly provides an electric heating glass window suitable for automobiles, trains or airplanes.

Background art:

in cold or rainy weather, the vehicle glass may be covered with frost or snow or fog, and at this time, it is necessary to rapidly heat a view field area of the vehicle glass, particularly a windshield in front of a driver, to remove the frost or snow and fog, and after the view field is restored, the heating power may be reduced, and it is sometimes necessary to maintain the surface of the vehicle glass at a certain temperature to avoid refreezing or fogging while removing the frost or snow and fog outside the view field area on the vehicle glass.

Conventionally, the heating of the vehicle glass is generally uniform as a whole, and the heating power density distribution of a certain area in the whole area cannot be adjusted, for example, the vehicle glass is uniformly heated by using a transparent conductive layer as disclosed in patents US3313920, DE102008029986a1, US20090321407a1, etc., and the vehicle glass is uniformly heated by using a printed silver paste heating line as disclosed in patents JP1989018133U, GB2372927A, CN110891340A, etc., which cannot meet the requirement of adjusting the heating power in real time according to the change of the heating environment.

In order to form heating zones of different heating values on a glass plate, patent CN110191866A utilizes the adjustment of the length, width and/or spacing of a plurality of heating lines arranged in parallel between two bus bars, patent WO1989005561a1 is to divide the heating zones spatially to allocate each heating zone to one of the three-phase connections of a three-phase power supply, patent CN102577596A is to arrange at least one high-resistance bus bar in a first portion requiring rapid heating, and these patents are designed to have different heating powers for different zones independent from each other.

The invention content is as follows:

the invention aims to solve the technical problem that the prior art cannot perform high-power rapid heating on the same area and then convert the high-power rapid heating into low-power heating, and the like, and provides an electric heating glass window.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an electrical heating glass window, includes glass board, first busbar, the second busbar that converges, many first heater strips, the third busbar that converges, the fourth busbar that converges and many second heater strips, and the both ends of every first heater strip are connected with first busbar, the second busbar electricity that converges respectively, and the both ends of every second heater strip are connected its characterized in that with third busbar, the fourth busbar electricity that converges respectively: the first bus bar and the third bus bar extend along a first edge of the glass plate, the second bus bar and the fourth bus bar extend along a second edge of the glass plate, at least one first heating wire penetrates through the third bus bar and the fourth bus bar and is electrically connected with the third bus bar and the fourth bus bar, the first bus bar and the third bus bar are connected with a positive electrode of a power supply, and the second bus bar and the fourth bus bar are connected with a negative electrode of the power supply.

Preferably, at least one of the first heating lines is located between two adjacent second heating lines, and at least one of the second heating lines is located between two adjacent first heating lines.

Preferably, the third bus bar is parallel to the first bus bar, the fourth bus bar is parallel to the second bus bar, a distance between the third bus bar and the first edge is greater than a distance between the first bus bar and the first edge, and a distance between the fourth bus bar and the second edge is greater than a distance between the second bus bar and the second edge.

Preferably, the first edge and the second edge are opposite edges or adjacent edges of the glass plate, the first bus bar is parallel to the first edge, and the second bus bar is parallel to the second edge.

Preferably, a first switch is arranged between the first bus bar and the positive electrode of the power supply, a second switch is arranged between the third bus bar and the positive electrode of the power supply, a third switch is arranged between the fourth bus bar and the negative electrode of the power supply, and a fourth switch is arranged between the second bus bar and the negative electrode of the power supply.

More preferably, closing the second switch and the third switch forms a first heating zone between the third bus bar and the fourth bus bar, closing the first switch and the third switch forms a second heating zone between the first bus bar and the fourth bus bar, closing the second switch and the fourth switch forms a third heating zone between the second bus bar and the third bus bar, closing the first switch and the fourth switch forms a fourth heating zone between the first bus bar and the second bus bar, and the first heating zone, the second heating zone, the third heating zone, and the fourth heating zone at least partially overlap each other.

Further, the heating power density of the second heating area and the third heating area is less than that of the first heating area, and the heating power density of the fourth heating area is less than that of the second heating area and the third heating area.

Preferably, the first heating wires and the second heating wires are alternately arranged, or at least two second heating wires are disposed between adjacent two first heating wires.

Preferably, the length of the third bus bar is less than or equal to the length of the first bus bar, and the length of the fourth bus bar is less than or equal to the length of the second bus bar.

Preferably, the length of the third busbar is less than at least 20% of the length of the first busbar, and the length of the fourth busbar is less than at least 20% of the length of the second busbar.

Preferably, the third bus bar is provided in at least two segments spaced apart from each other, the fourth bus bar is provided in at least two segments spaced apart from each other, and at least one first heating wire passes through and is electrically connected to at least one segment of the third bus bar and at least one segment of the fourth bus bar.

Preferably, the third bus bar is provided as a shorter first section and a longer second section, the fourth bus bar is provided as a longer third section and a shorter fourth section, a plurality of first heating wires pass through the first section and the third section and are electrically connected to the first section and the third section, a plurality of first heating wires pass through the second section and the third section and are electrically connected to the second section and the third section, and a plurality of first heating wires pass through the second section and the fourth section and are electrically connected to the second section and the fourth section.

Preferably, the glass plate is single-piece toughened glass, the material of first heater wire with the second heater wire chooses for use electrically conductive silver thick liquid or transparent conductive oxide membrane, transparent conductive oxide membrane includes ITO layer, FTO layer, ATO layer or AZO layer.

Preferably, electrical heating glass window still includes middle tie coat and second transparent plate, middle tie coat will the glass board with the second transparent plate bonds together, first heater wire with the second heater wire is located the glass board with between the second transparent plate, first heater wire with the material of second heater wire chooses for use electrically conductive silver thick liquid, wire or transparent conductive film, the wire is copper wire, tungsten filament, aluminium wire or silver wire, transparent conductive film includes metal level, metal alloy layer or metal oxide layer, gold, silver, copper, aluminium or molybdenum are chooseed for use to the metal level, the metal alloy layer is the silver alloy, the metal oxide layer is ITO layer, FTO layer, ATO layer or AZO layer.

More preferably, the material of the second transparent plate is selected from soda lime glass, aluminosilicate glass, borosilicate glass, PMMA or PC.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the electric heating glass window adopted by the invention can form a plurality of heating areas with different heating power densities and at least partially overlapped with each other, thereby realizing step heating and zone heating, being suitable for different heating scenes on automobiles, trains or airplanes, ensuring defrosting and demisting efficiency and saving energy.

Description of the drawings:

FIG. 1 is a schematic structural view of a first embodiment of an electrically heated glazing according to the invention;

FIG. 2 is a schematic view of a second embodiment of an electrically heated glazing according to the invention;

FIG. 3 is a schematic view of a third embodiment of an electrically heated glazing according to the invention;

FIG. 4 is a schematic structural view of a fourth embodiment of an electrically heated glazing according to the invention;

FIG. 5 is a schematic structural view of a fifth embodiment of an electrically heated glazing according to the invention;

FIG. 6 is a schematic view, partially in section, of a single sheet of toughened glass for an electrically heated glazing according to the invention;

fig. 7 is a schematic partial cross-sectional view of an electrically heated glazing according to the invention as a laminated glazing.

The specific implementation mode is as follows:

the invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, an electrically heated glass window according to the present invention includes a glass plate 1, a first bus bar 2, a second bus bar 3, a plurality of first heating wires 4, a third bus bar 5, a fourth bus bar 6, and a plurality of second heating wires 7, wherein both ends of each first heating wire 4 are electrically connected to the first bus bar 2 and the second bus bar 3, respectively, both ends of each second heating wire 7 are electrically connected to the third bus bar 5 and the fourth bus bar 6, respectively, the first bus bar 2 and the third bus bar 5 are arranged to extend along a first edge 11 of the glass plate 1, the second bus bar 3 and the fourth bus bar 6 are arranged to extend along a second edge 12 of the glass plate 1, at least one first heating wire 4 passes through the third bus bar 5 and the fourth bus bar 6 and is electrically connected to the third bus bar 5 and the fourth bus bar 6, at least one first heating wire 4 is positioned between two adjacent second heating wires 7, at least one second heating wire 7 is positioned between two adjacent first heating wires 4, the first bus bar 2 and the third bus bar 5 are connected with the positive pole of a power supply 100, and the second bus bar 3 and the fourth bus bar 6 are connected with the negative pole of the power supply 100; through first busbar 2 that converges 3 second busbar and 6 fourth busbar form the heating zone of a plurality of heating power density differences of each other at least partial coincidence on the surface of glass board 1, realize stepping heating and subregion heating, can adapt to different heating scenes, can enough guarantee defrosting defogging efficiency, can also the energy can be saved, heats according to the dynamic adjustment in order to satisfy the heating demand of the glass window on car, train or the aircraft better. The power supply voltage of the power supply is 12-110V, preferably 36-60V; the power supply can be a direct current power supply or an alternating current power supply. The electrically heated glazing is suitable for use as a glazing in an automobile, train or aircraft, for example a front windscreen, side glazing, rear windscreen or the like.

Preferably, the third bus bar 5 is parallel to the first bus bar 2, the fourth bus bar 6 is parallel to the second bus bar 3, a distance between the third bus bar 5 and the first side 11 is greater than a distance between the first bus bar 2 and the first side 11, and a distance between the fourth bus bar 6 and the second side 12 is greater than a distance between the second bus bar 3 and the second side 12. In fig. 1, the first edge 11 and the second edge 12 are opposite edges of the glass plate 1, and in fig. 2, the first edge 11 and the second edge 12 are adjacent edges of the glass plate 1. In some embodiments, the first busbar 2 is parallel to the first edge 11 and the second busbar 3 is parallel to the second edge 12 to obtain a heating zone matching the shape of the glass. In some embodiments, as shown in fig. 1, the first busbar 2 is also parallel to the second busbar 3 to obtain a heating zone matching the glass shape.

In fig. 1, a first switch S1 is disposed between the first bus bar 2 and the positive electrode of the power supply, a second switch S2 is disposed between the third bus bar 5 and the positive electrode of the power supply, a third switch S3 is disposed between the fourth bus bar 6 and the negative electrode of the power supply, and a fourth switch S4 is disposed between the second bus bar 3 and the negative electrode of the power supply; defaults that the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are in an open state, when the power-on heating is needed, one of the first switch S1 and the second switch S2 is closed, and one of the third switch S3 and the fourth switch S4 is closed, so that a plurality of heating zones with different heating power densities are formed on the glass plate 1, the stepped heating is realized in the overlapped area of the plurality of heating zones, and different heating scenes can be adapted.

Specifically, when the second switch S2 and the third switch S3 are closed, the current of the power supply 100 flows into the plurality of second heating wires 7 and the plurality of first heating wires 4 electrically connected to the third bus bar 5 and the fourth bus bar 6 through the third bus bar 5 and the fourth bus bar 6, and at this time, the plurality of second heating wires 7 and the plurality of first heating wires 4 are connected in parallel between the third bus bar 5 and the fourth bus bar 6 to form a first heating zone, and the first heating zone has the maximum heating power density, can be heated quickly to remove frost and snow, can recover the observation visual field, particularly the main visual field, of the driver quickly, ensures driving safety, and realizes high-grade heating; closing the first switch S1 and the third switch S3, the current of the power supply 100 flows into the plurality of first heating wires 4 electrically connected to the first bus bar 2 and the fourth bus bar 6 through the first bus bar 2 and the fourth bus bar 6, and the plurality of first heating wires 4 generate heat in parallel between the first bus bar 2 and the fourth bus bar 6 to form a second heating zone, which has a medium heating power density because the length of the first heating wires 4 between the first bus bar 2 and the fourth bus bar 6 is greater than the length of the first heating wires 4 between the third bus bar 5 and the fourth bus bar 6, and the heating power density of the second heating zone is less than that of the first heating zone, so that the second heating zone can be used as transition heating after high-grade heating or as direct water mist removal, the medium heating is realized; closing the second switch S2 and the fourth switch S4, the current of the power supply 100 flows into the plurality of first heating wires 4 electrically connected to the second bus bar 3 and the third bus bar 5 through the second bus bar 3 and the third bus bar 5, and the plurality of first heating wires 4 generate heat in parallel between the second bus bar 3 and the third bus bar 5 to form a third heating zone, which also has a medium heating power density because the length of the first heating wires 4 between the second bus bar 3 and the third bus bar 5 is greater than the length of the first heating wires 4 between the third bus bar 5 and the fourth bus bar 6, and the heating power density of the third heating zone is less than the heating power density of the first heating zone, and can be used as transition heating after top-grade heating or as direct water mist removal, the medium heating is realized; closing the first switch S1 and the fourth switch S4, the current of the power supply 100 flows into the plurality of first heating wires 4 through the first bus bar 2 and the second bus bar 3, at this time, the plurality of first heating wires 4 form a fourth heating zone at the first bus bar 2 and the second bus bar 3, since the length of the first heating wire 4 between the first bus bar 2 and the second bus bar 3 is greater than the length of the first heating wire 4 in the second heating zone and the third heating zone, the fourth heating zone has the minimum heating power density, the heating power density of the fourth heating zone is less than the heating power density of the second heating zone and the third heating zone, and the fourth heating zone can be used as maintenance heating after high-grade heating or medium-grade heating, avoid frosting, snow accumulation or fogging again, or continue to remove the remaining frost and fog of other areas on a larger area, and low-grade heating is realized.

In the present invention, the first heating zone, the second heating zone, the third heating zone, and the fourth heating zone are at least partially overlapped with each other, and stepped heating is realized by high-level heating, medium-level heating, and low-level heating, and the high-level heating, the medium-level heating, and the low-level heating may be selected according to an actual heating scenario and a heating requirement, for example, high-level heating is performed first, then the medium-level heating is performed last, or the high-level heating is performed first and then the low-level heating is performed directly, or the medium-level heating is performed first and then the low-level heating is performed, or the low-level heating is performed directly.

In fig. 1 and 2, the first heating wires 4 and the second heating wires 7 are alternately arranged, each first heating wire 4 in fig. 1 passes through the third and

fourth bus bars

5 and 6 and is electrically connected with the third and

fourth bus bars

5 and 6, a part of the first heating wires 4 in fig. 2 passes through the third and

fourth bus bars

5 and 6 and is electrically connected with the third and

fourth bus bars

5 and 6, and another part of the first heating wires 4 in fig. 2 does not pass through the third and

fourth bus bars

5 and 6 and is not electrically connected with the third and

fourth bus bars

5 and 6, so as to meet the requirements of the step heating and the step heating of the glass plates 1 of different shapes.

As shown in fig. 3, the length of the third bus bar 5 is less than or equal to the length of the first bus bar 2, the length of the fourth bus bar 6 is less than or equal to the length of the second bus bar 3, each first heating wire 4 passes through the third bus bar 5 and the fourth bus bar 6 and is electrically connected with the third bus bar 5 and the fourth bus bar 6, at least two second heating wires 7 are arranged between two adjacent first heating wires 4, and the requirements of the glass plate 1 for step heating and zone heating are met by adjusting the arrangement density of the first heating wires 4 and the second heating wires 7.

As shown in fig. 4, the length of the third bus bar 5 is smaller than that of the first bus bar 2, the length of the fourth bus bar 6 is smaller than that of the second bus bar 3, a part of the first heating wires 4 passes through the third and

fourth bus bars

5, 6 and is electrically connected with the third and

fourth bus bars

5, 6, another part of the first heating wires 4 extends between the first and

second bus bars

2, 3 in parallel with each other, the third and

fourth bus bars

5, 6 do not extend to the heating zone formed by the other part of the first heating wires 4, that is, an independent single heating zone and a superposed heating zone are formed between the first and

second bus bars

2, 3, in which only heating or no heating is possible, by adjusting the lengths of the third and

fourth bus bars

5, 6, to meet the requirements of local stepped heating and zone heating of the glass sheet 1. In particular, the length of the third busbar 5 may be less than at least 20%, or 30%, or even 50%, etc. of the length of the first busbar 2, and the length of the fourth busbar 6 may be less than at least 20%, or 30%, or even 50%, etc. of the length of the second busbar 3.

As shown in fig. 5, the third bus bar 5 is provided in at least two

stages

51, 52 spaced apart from each other, the fourth bus bar 6 is provided in at least two

stages

61, 62 spaced apart from each other, and at least one first heating wire 4 passes through and is electrically connected to at least one stage of the third bus bar 5 and at least one stage of the fourth bus bar 6. At least two

segments

51, 52 of the third busbar 5 may be equal in length to each other, or may have at least one segment that is not equal in length to another segment; the at least two

segments

61, 62 of the fourth bus bar 6 may be equal in length to each other, or may have at least one segment that is not equal in length to the other segments. Fig. 5 specifically shows that the third bus bar 5 is provided as a short first segment 51 and a long second segment 52, the fourth bus bar 6 is provided as a long third segment 61 and a short fourth segment 62, a plurality of first heating wires 4 pass through the first segment 51 and the third segment 61 and are electrically connected with the first segment 51 and the third segment 61, a plurality of first heating wires 4 pass through the second segment 52 and the third segment 61 and are electrically connected with the second segment 52 and the third segment 61, a plurality of first heating wires 4 pass through the second segment 52 and the fourth segment 62 and are electrically connected with the second segment 52 and the fourth segment 62, and the third bus bar 5 and the fourth bus bar 6 are designed in a segmented manner to meet the requirements of the staged heating and the zoned heating of the glass plate 1.

In fig. 1 to 5, the first heating wires 4 and the second heating wires 7 are arranged substantially parallel to each other, and in some embodiments, at least one first heating wire 4 may not be parallel to other first heating wires 4, or at least one second heating wire 7 may not be parallel to other second heating wires 7. The size, number, spacing, etc. of the first and

second heating wires

4 and 7 of the present invention shown in fig. 1 to 5 are for simplicity of description and clarity of presentation only and do not limit what is claimed in the present invention.

As shown in fig. 6, the glass plate 1 is a single piece of tempered glass, the electrically heated glass window may be used as a rear windshield, a side window glass, or the like, the material of the first heating wire 4 and the second heating wire 7 can be conductive silver paste or Transparent Conductive Oxide (TCO) film, the conductive silver paste may form the first heating line 4 and the second heating line 7 on the surface of the glass plate 1 by printing or the like, the transparent conductive oxide film may include an ITO layer (tin-doped indium oxide), an FTO layer (fluorine-doped tin oxide), an ATO layer (antimony-doped tin oxide), an AZO layer (aluminum-doped zinc oxide), or the like, the transparent conductive oxide film may be deposited directly onto the surface of the glass plate 1 by Chemical Vapor Deposition (CVD) or physical vapor deposition (CVD), then forming the first heating line 4 and the second heating line 7 on the surface of the glass plate 1 by film removing processes such as laser film removing, mechanical friction, chemical etching and the like; the transparent conductive oxide film may further include a dielectric layer.

As shown in fig. 7, the electric heating glass window is a laminated glass, the electric heating glass window further includes an intermediate bonding layer 20 and a second transparent plate 30, the intermediate bonding layer 20 bonds the glass plate 1 and the second transparent plate 30 together, the electric heating glass window can be used as a front windshield, a side window, a skylight, a rear windshield, etc., the first heating wire 4 and the second heating wire 7 are located between the glass plate 1 and the second transparent plate 30, the first heating wire 4 and the second heating wire 7 can be directly disposed on the surface of the glass plate 1, and also can be disposed on the surface of the intermediate bonding layer 20 or disposed in the intermediate bonding layer 20, and the materials of the first heating wire 4 and the second heating wire 7 can be conductive silver paste, metal wires, transparent conductive films, etc. The material of the second transparent board 30 is selected from soda lime glass, aluminosilicate glass, borosilicate glass, PMMA (polymethyl methacrylate), PC (polycarbonate), and the like.

The conductive silver paste may form the first heating line 4 and the second heating line 7 on the surface of the glass plate 1 by printing or the like; the metal wire is preferably a copper wire, a tungsten wire, an aluminum wire or a silver wire, and the like, and can be embedded into the intermediate bonding layer 20 through a wire arrangement device and a wire arrangement process to form the first heating wire 4 and the second heating wire 7; the transparent conductive film can comprise a metal layer, a metal alloy layer or a metal oxide layer, wherein the metal layer can be selected from gold (Au), silver (Ag), copper (Cu), aluminum (Al) or molybdenum (Mo); the metal alloy layer can be silver alloy, such as silver-copper alloy, silver-indium alloy and the like; the metal oxide layer can be an ITO layer (tin-doped indium oxide), an FTO layer (fluorine-doped tin oxide), an ATO layer (antimony-doped tin oxide), an AZO layer (aluminum-doped zinc oxide) or the like, the transparent conductive film can be directly deposited on the surface of the glass plate 1 by a Chemical Vapor Deposition (CVD) or physical vapor deposition (CVD) method, and then the first heating wire 4 and the second heating wire 7 are formed on the surface of the glass plate 1 by film removal processes such as laser film removal, mechanical friction, chemical etching and the like; the transparent conductive film can further comprise a dielectric layer.

The materials of the first bus bar 2, the second bus bar 3, the third bus bar 5 and the fourth bus bar 6 can be conductive silver paste and/or metal foil, and the conductive silver paste can form the first heating wire 4 and the second heating wire 7 on the glass plate 1 and then form the first bus bar 2, the second bus bar 3, the third bus bar 5 and the fourth bus bar 6 which are directly electrically contacted with the first heating wire 4 or the second heating wire 7 on the surface of the glass plate 1 by printing and other manners; the metal foil may be a copper foil, a tin-plated copper foil, an aluminum foil, a nichrome foil, or the like, the metal foil may form the first bus bar 2, the second bus bar 3, the third bus bar 5, and the fourth bus bar 6, which are in direct electrical contact with the first heating wire 4 or the second heating wire 7, by means of solder welding, conductive adhesive bonding, or the like after forming the first heating wire 4 and the second heating wire 7 on the glass plate 1 or on the intermediate adhesive layer 20, and the metal foil may be a single-piece metal foil or a double-piece metal foil; the first bus bar 2, the second bus bar 3, the third bus bar 5 and the fourth bus bar 6 can also select conductive silver paste and metal foil simultaneously, the conductive silver paste is directly printed on the surface of the glass plate 1, and then the metal foil is fixed on the conductive silver paste through modes such as solder welding or conductive adhesive bonding.

The intermediate adhesive layer 20 of the present invention is used to adhere the glass plate 1 and the second transparent plate 30 together, and for example, an ionic intermediate film (SGP), polyvinyl chloride (PVC), polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), Polyacrylate (PA), Polyurethane (PUR), or the like can be selected. Of course, the intermediate adhesive layer 20 may also have other functions such as providing at least one colored region for a shadow band to reduce interference of sunlight with human eyes or adding an infrared ray absorber to have a sun-screening or heat-insulating function, and for example, the intermediate adhesive layer 20 may further include at least two layers, one of which has a higher plasticizer content to have a sound-insulating function, or one of which has a wedge shape to have a head-up display (HUD) function, etc.

The above description specifically describes an electrically heated glass window according to the present invention, but the present invention is not limited to the above description of the embodiments, and therefore, any improvements, equivalent modifications, substitutions and the like made in accordance with the technical gist of the present invention are within the scope of the present invention.

Claims

1. The utility model provides an electrical heating glass window, includes glass board, first busbar, the second busbar that converges, many first heater strips, the third busbar that converges, the fourth busbar that converges and many second heater strips, and the both ends of every first heater strip are connected with first busbar, the second busbar electricity that converges respectively, and the both ends of every second heater strip are connected its characterized in that with third busbar, the fourth busbar electricity that converges respectively: the first bus bar and the third bus bar extend along a first edge of the glass plate, the second bus bar and the fourth bus bar extend along a second edge of the glass plate, at least one first heating wire penetrates through the third bus bar and the fourth bus bar and is electrically connected with the third bus bar and the fourth bus bar, the first bus bar and the third bus bar are connected with a positive electrode of a power supply, and the second bus bar and the fourth bus bar are connected with a negative electrode of the power supply;

a first switch is arranged between the first bus bar and the positive pole of the power supply, a second switch is arranged between the third bus bar and the positive pole of the power supply, a third switch is arranged between the fourth bus bar and the negative pole of the power supply, and a fourth switch is arranged between the second bus bar and the negative pole of the power supply; closing the second switch and the third switch forms a first heating zone between the third bus bar and the fourth bus bar, closing the first switch and the third switch forms a second heating zone between the first bus bar and the fourth bus bar, closing the second switch and the fourth switch forms a third heating zone between the second bus bar and the third bus bar, closing the first switch and the fourth switch forms a fourth heating zone between the first bus bar and the second bus bar, and the first heating zone, the second heating zone, the third heating zone, and the fourth heating zone at least partially overlap one another.

2. An electrically heated glazing as claimed in claim 1, wherein: at least one first heating wire is located between two adjacent second heating wires, and at least one second heating wire is located between two adjacent first heating wires.

3. An electrically heated glazing as claimed in claim 1, wherein: the third bus bar is parallel to the first bus bar, the fourth bus bar is parallel to the second bus bar, the distance between the third bus bar and the first edge is greater than the distance between the first bus bar and the first edge, and the distance between the fourth bus bar and the second edge is greater than the distance between the second bus bar and the second edge.

4. An electrically heated glazing as claimed in claim 1, wherein: the first edge and the second edge are opposite edges or adjacent edges of the glass plate, the first bus bar is parallel to the first edge, and the second bus bar is parallel to the second edge.

5. An electrically heated glazing as claimed in claim 1, wherein: the heating power density of the second heating area and the third heating area is smaller than that of the first heating area, and the heating power density of the fourth heating area is smaller than that of the second heating area and the third heating area.

6. An electrically heated glazing as claimed in claim 1, wherein: the first heating wires and the second heating wires are alternately arranged, or at least two second heating wires are arranged between every two adjacent first heating wires.

7. An electrically heated glazing as claimed in claim 1, wherein: the length of the third bus bar is less than or equal to the length of the first bus bar, and the length of the fourth bus bar is less than or equal to the length of the second bus bar.

8. An electrically heated glazing as claimed in claim 1, wherein: the length of the third bus bar is less than at least 20% of the length of the first bus bar and the length of the fourth bus bar is less than at least 20% of the length of the second bus bar.

9. An electrically heated glazing as claimed in claim 1, wherein: the third bus bar is disposed in at least two segments spaced apart from each other, the fourth bus bar is disposed in at least two segments spaced apart from each other, and at least one first heating wire passes through and is electrically connected to at least one segment of the third bus bar and at least one segment of the fourth bus bar.

10. An electrically heated glazing as claimed in claim 1, wherein: the third bus bar is provided with a first short section and a second long section, the fourth bus bar is provided with a third long section and a fourth short section, a plurality of first heating wires penetrate through the first section and the third section and are electrically connected with the first section and the third section, a plurality of first heating wires penetrate through the second section and the third section and are electrically connected with the second section and the third section, and a plurality of first heating wires penetrate through the second section and the fourth section and are electrically connected with the second section and the fourth section.

11. An electrically heated glazing as claimed in claim 1, wherein: the glass plate is monolithic toughened glass, first heater wire with the material of second heater wire chooses for use conductive silver thick liquid or transparent conductive oxide membrane, transparent conductive oxide membrane includes ITO layer, FTO layer, ATO layer or AZO layer.

12. An electrically heated glazing as claimed in claim 1, wherein: electric heating glass window still includes middle tie coat and second transparent plate, middle tie coat will the glass board with the second transparent plate bonds together, first heater wire with the second heater wire is located the glass board with between the second transparent plate, first heater wire with electrically conductive silver thick liquid, wire or transparent conductive film are chooseed for use to the material of second heater wire, the wire is copper wire, tungsten filament, aluminium wire or silver wire, transparent conductive film includes metal level, metal alloy layer or metal oxide layer, gold, silver, copper, aluminium or molybdenum are chooseed for use to the metal level, the metal alloy layer is the silver alloy, the metal oxide layer is ITO layer, FTO layer, ATO layer or AZO layer.

13. An electrically heated glazing as claimed in claim 12 wherein: the material of the second transparent plate is selected from soda-lime glass, aluminosilicate glass, borosilicate glass, PMMA or PC.