Window glass and window assembly

Abstract

The invention relates to vehicle window glass and a vehicle window assembly, and relates to the technical field of vehicles. The vehicle window glass comprises a glass main body and heating wires, and the heating wires are arranged on the glass main body; wherein the heating wires arranged in the sensor signal transmission area and the heating wires arranged in the wiper stop area are connected in series. By the adoption of the vehicle window glass and the vehicle window assembly, the defrosting and demisting effects of multiple areas on the vehicle window glass can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a window glass and a window assembly. Background Technology

[0002] With the rapid development of vehicle technology, the demand for vehicle intelligence and comfort is increasing, which relies on cameras to collect images of the surrounding environment. To ensure the reliability of the collected data, it is necessary to maintain the clarity of the car window glass.

[0003] To address this, it is necessary to support defrosting and defogging of the car windows and ensure the proper functioning of the windshield wipers, thereby ensuring the clarity of the car windows and guaranteeing driving safety.

[0004] The applicant found that the traditional solution was ineffective at defrosting and defogging. Summary of the Invention

[0005] Therefore, it is necessary to provide a window glass and window assembly that can improve the defrosting and defogging effect in multiple areas of the window glass.

[0006] In a first aspect, this application provides a vehicle window glass, comprising:

[0007] The glass body has a sensor signal transmission area and a wiper resting area;

[0008] Heating wires are located in the sensor signal transmission area and the wiper resting area;

[0009] The heating wire in the sensor signal transmission area and the heating wire in the wiper resting area are connected in series.

[0010] In one embodiment, the power density of the heating wire in the wiper dwell area is greater than or equal to 1000W / ㎡ and less than or equal to 2500W / ㎡, and / or the power density of the heating wire in the sensor signal transmission area is greater than or equal to 500W / ㎡ and less than or equal to 1500W / ㎡.

[0011] In one embodiment, the heating wire supports a voltage greater than or equal to 36V.

[0012] In one embodiment, the heating wire is used to connect to a voltage of 36V, 48V, or 72V.

[0013] In one embodiment, the glass body has a shielding area and a light-transmitting area, the visible light transmittance of the light-transmitting area is greater than or equal to 70%, the visible light transmittance of the shielding area is less than or equal to 10%, the shielding area is arranged along the periphery of the glass body, and the shielding area avoids the light-transmitting area and the sensor signal transmission area.

[0014] The shaded area surrounds the light-transmitting area, and the wiper resting area is located in the shaded area below the light-transmitting area;

[0015] The sensor signal transmission area is located within a shielded area above the light-transmitting area, and the shielded area above the light-transmitting area completely surrounds the sensor signal transmission area, or...

[0016] The sensor signal transmission area is located within the light-transmitting area, and the shielded area above the light-transmitting area partially surrounds the sensor signal transmission area.

[0017] In one embodiment, the heating wire is also located in the shielded area, and the heating wire in the sensor signal transmission area is connected to the heating wire in the wiper resting area through the heating wire in the shielded area.

[0018] In one embodiment, the heating wire of the sensor signal transmission area extends through the sensor signal transmission area multiple times;

[0019] The heating wire in the sensor signal transmission area includes multiple first segments and first connecting segments, and the first segments and first connecting segments are connected to each other. Each first segment extends along the width direction of the glass body, and each first connecting segment extends along the length direction of the glass body. Multiple first segments are spaced apart along the length direction of the glass body, and each first connecting segment is used to connect the close ends of two adjacent first segments.

[0020] In one embodiment, the heating wire of the wiper stop area extends through the wiper stop area multiple times;

[0021] The heating wire in the wiper resting area includes multiple second segments and second connecting segments, and the second segments and the second connecting segments are connected to each other. Each second segment extends along the width direction of the glass body, and each second connecting segment extends along the length direction of the glass body. The multiple second segments are spaced apart along the length direction of the glass body, and the second connecting segment is used to connect the ends of two second segments.

[0022] In one embodiment, the two electrodes of the heating wire are positioned in a shielded area above the light-transmitting area; or,

[0023] The two electrodes of the heating wire are positioned in a shaded area below the light-transmitting area, avoiding the wiper resting area.

[0024] In one embodiment, the number of first segments is 3 to 10; and / or, along the length direction of the glass body, the spacing d1 between two adjacent first segments is 5 mm to 30 mm.

[0025] In one embodiment, the number of second segments is 3 to 10; and / or, along the length direction of the glass body, the spacing d2 between two adjacent second segments is 5 mm to 30 mm.

[0026] In one embodiment, the heating wire in the wiper resting area includes two heating section groups, which are arranged opposite to each other along the length of the glass body.

[0027] Each heating section group includes multiple third sections and third connecting sections, wherein each third section extends along the width direction of the glass body, each third connecting section extends along the length direction of the glass body, multiple third sections are spaced apart along the length direction of the glass body, and the third connecting section is used to connect the ends of two third sections.

[0028] The heating wire in the wiper rest area also includes a fourth section, which connects the two heating section groups.

[0029] In one embodiment, the two electrodes of the heating wire are positioned in the wiper dwell area.

[0030] In one embodiment, the number of third segments is 3 to 10; and / or, along the length of the glass body, the spacing d3 between two adjacent third segments is 5 mm to 30 mm.

[0031] In one embodiment, the distance between the positions of the two electrodes and the edge of the glass body is greater than 50 mm; and / or, the distance between the two electrodes is greater than 10 mm.

[0032] In one embodiment, the two electrodes are circular; or, the two electrodes are elliptical; or, the two electrodes are rounded rectangles with a chamfer radius greater than 3 mm.

[0033] In one embodiment, the width of the heating wire in the sensor signal transmission area is greater than or equal to 0.3 mm and less than or equal to 1 mm; and / or,

[0034] The width of the heating wire in the wiper stop area is greater than or equal to 0.3 mm and less than or equal to 3 mm.

[0035] In one embodiment, the heating wire includes a single conductor; or, the heating wire includes at least two conductors connected in parallel.

[0036] In one embodiment, if the heating wire includes a single conductor, the length of the conductor is greater than or equal to 4000 mm; or if the heating wire includes at least two conductors, the length of each single conductor is greater than or equal to 2000 mm.

[0037] In one embodiment, the heating wire is located inside the glass body, and a covering layer is provided on the side of the heating wire away from the glass body.

[0038] The overlay is a printing ink layer.

[0039] In one embodiment, the heating wire is a printed silver paste wire.

[0040] In one embodiment, the heating wire portion is disposed outside the rain sensor area, and the distance between the heating wire and the rain sensor area is greater than or equal to 30 mm.

[0041] Secondly, this application also provides a window assembly, including:

[0042] As in any of the embodiments of the first aspect, the vehicle window glass;

[0043] The sensor is located inside the vehicle and faces the sensor signal transmission area;

[0044] Windshield wipers are located on the exterior of the vehicle and can remain in the wiper stop area.

[0045] In the aforementioned vehicle window glass and window assembly, by connecting the heating wires used for heating the wiper resting area and the sensor signal transmission area in series, compared with traditional technology, a higher voltage can be supported for rapid defrosting under high voltage, effectively improving defrosting power. After being connected in series, the overall resistance of the heating wires increases, which reduces the heating power at the same voltage. This reduces the local power density, keeping the power density of the heating wires within a controllable range, thus suppressing the problem of excessively high hot spot temperatures in the heating area. It also balances the efficiency and heating uniformity when heating multiple areas on the vehicle window glass, improving the overall defrosting and defogging effect. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a vehicle window glass in one embodiment of this application;

[0048] Figure 2 This is a schematic diagram of the structure of the vehicle window glass in another embodiment of this application;

[0049] Figure 3 This is a schematic diagram of the structure of the vehicle window glass in another embodiment of this application;

[0050] Figure 4 for Figure 3 A partial sectional view along line II;

[0051] Figure 5 This is a schematic diagram of the structure of the vehicle window glass in another embodiment of this application;

[0052] Figure 6 for Figure 5 A partial sectional view along line II-II. Detailed Implementation

[0053] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0055] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” or “having,” etc., specify the presence of the stated features, integrals, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0056] In this application, as Figures 1-6 As shown, a vehicle window glass 1 is provided, which includes a glass body 10 and a heating wire 11. The glass body 10 has a sensor signal transmission area A and a wiper resting area B. The heating wire 11 is disposed in the sensor signal transmission area A and the wiper resting area B, wherein the heating wire 11 in the sensor signal transmission area A and the heating wire 11 in the wiper resting area B are connected in series.

[0057] The glass body 10 protects the vehicle interior, where the window assembly is located, from external environmental factors such as wind, rain, and dust, and provides visibility for the driver and passengers. The heating wire 11 can be made of conductive material, preferably a printed silver paste wire. This wire generates heat to defrost and defog, improving the visibility of the window glass 1. In winter or inclement weather conditions, the heating wire 11 heats the surface of the glass body 10, preventing the windshield wipers from freezing. Working in conjunction with the wiper operation, it defrosts and defogs the glass body 10, ensuring the clarity of the window glass 1 and providing good visibility for the driver and passengers.

[0058] The heating wire 11 is distributed on the glass body 10, covering at least the sensor signal transmission area A and the wiper resting area B. When the window glass 1 is mounted on the window assembly, the sensor 20 (such as a camera) is located on the inner side of the glass body 10. The sensor signal transmission area A refers to the signal transmission area of ​​the sensor 20 on the glass body 10. By arranging the heating wire 11 in the sensor signal transmission area A, defrosting and defogging of the glass body 10 in this area can be effectively achieved, ice formation can be suppressed, and visibility in this area can be guaranteed. This ensures that the camera can always capture clear images, providing reliable data for intelligent driving and other vehicle intelligent functions of the vehicle where the window assembly is located, thus contributing to driving safety.

[0059] It should be noted that the sensor 20 in this application includes, but is not limited to, visible light cameras, near-infrared cameras, thermal imagers, lidar, etc.

[0060] The wiper rest area B refers to the area on the glass body 10 where the wipers are not in operation. For example, it could be the lower edge of the windshield 1 when it is installed. By arranging heating wires 11 in the wiper rest area B, frost or ice can be prevented from forming in this area, ensuring that the wipers can operate smoothly in various weather conditions, thereby guaranteeing the clarity of the windshield 1 and providing the user with a clear view.

[0061] In the aforementioned windshield glass and windshield assembly, by connecting the heating wires of the wiper resting area B and the sensor signal transmission area A in series, compared to traditional technology, a higher voltage can be supported for rapid defrosting under higher voltage, effectively improving defrosting power. After being connected in series, the overall resistance of the heating wires increases, which reduces the heating power at the same voltage. This reduces the local power density, keeping the power density of the heating wires within a controllable range, thus suppressing the problem of excessively high hot spot temperatures in the heating area. It also balances the efficiency and heating uniformity when heating multiple areas on the windshield, improving the overall defrosting and defogging effect.

[0062] In addition, in the series connection of heating wires, in order to support the access of high voltage, the trace width required to achieve the resistance that can match the voltage is different compared with the traditional technology when the same voltage is applied. In the series connection of heating wires in this embodiment, the trace width can be wider, thereby reducing the difficulty requirements of the heating wire printing manufacturing process and reducing production costs.

[0063] Furthermore, by connecting the heating wires of the two areas in series, heating power to both areas can be supplied through a single connector, reducing the layout of the vehicle body wiring harness and lowering the complexity of the heating wire wiring process.

[0064] In one embodiment, the heating wire can be arranged close to the edge of the glass body. This arrangement avoids the heating wire routing affecting the visible field of view within the glass body, thereby providing the driver with a large field of vision.

[0065] In one embodiment, the lower limit of the power density of the heating wire is greater than or equal to the power density corresponding to the maximum allowable frost time of the vehicle window glass. The upper limit of the power density of the heating wire is less than or equal to the power density corresponding to the maximum allowable hot spot temperature of the vehicle window glass.

[0066] A higher power density in the heating wire results in a shorter defrosting time; however, excessively high power density can lead to excessively high hotspot temperatures. Therefore, the automotive window glass product provided in this application fully considers the design requirements for defrosting time and hotspot temperature when designing the heating wire. The lower limit of the heating wire's power density is determined by utilizing the power density corresponding to the maximum allowable defrosting time of the automotive window glass. Heating wires designed under this constraint have heating times less than or equal to this maximum defrosting time, meeting the defrosting efficiency requirements of automotive window glass in the vehicle application scenario where the window assembly is located.

[0067] Furthermore, the upper limit of the power density of the heating wire is determined by utilizing the power density corresponding to the maximum allowable hot spot temperature of the vehicle window glass. Heating wires designed based on this constraint have hot spot temperatures all less than or equal to this maximum hot spot temperature, meeting the hot spot suppression requirements of vehicle window glass in vehicle window assembly application scenarios. In other words, the vehicle window glass provided in this application embodiment can balance heating efficiency and hot spot suppression effects during defrosting and defogging.

[0068] In one embodiment, the power density of the heating wire in the wiper dwell area B is greater than or equal to 1000W / ㎡ and less than or equal to 2500W / ㎡, and / or the power density of the heating wire in the sensor signal transmission area A is greater than or equal to 500W / ㎡ and less than or equal to 1500W / ㎡.

[0069] The power density of a heating wire refers to the power consumed or generated per unit area, usually expressed in watts per square meter (W / ㎡). Power density is an important indicator of the heating capacity of a heating wire, representing the amount of heat that can be provided per square meter of heating wire.

[0070] For example, with the power density corresponding to the heating wire of the wiper resting area B being greater than or equal to 1000W / ㎡ and less than or equal to 2500W / ㎡, and the power density corresponding to the heating wire of the sensor signal transmission area A being greater than or equal to 500W / ㎡ and less than or equal to 1500W / ㎡ as constraints, 8 sets of vehicle window glass products were designed and heated to obtain the test results of Examples 1 to 8 as shown in Table 1.

[0071] Then, under other power density designs outside the constraints, comparative examples 1 to 4 of the vehicle window glass were formed and tested. The test results for comparative examples 1 to 4 are shown in Table 1. It should be noted that the same voltage was provided to the heating wires of different vehicle window glass during the test. Specifically, the test results are shown in Table 1 below:

[0072] Table 1

[0073]

[0074] As shown in Table 1, in Comparative Example 1, the power density settings of the heating wires in sensor signal transmission area A and wiper rest area B were relatively low, resulting in longer defrosting times for both areas. In Comparative Example 2, the power density setting of the heating wires in sensor signal transmission area A was relatively low, resulting in longer defrosting times, while the power density setting of the heating wires in wiper rest area B was moderate, resulting in shorter defrosting times. In Comparative Example 3, the power density setting of the heating wires in sensor signal transmission area A was moderate, resulting in shorter defrosting times, while the power density setting of the heating wires in wiper rest area B was relatively low, resulting in longer defrosting times. In Comparative Example 4, the power density settings of the heating wires in both sensor signal transmission area A and wiper rest area B were relatively high, resulting in higher hotspot temperatures in both areas. Therefore, the experimental results in Comparative Examples 1 to 4 were poor.

[0075] Referring to Table 1, it can be seen that in the vehicle window glass products provided in the embodiments of this application, the defrosting time of the heating wire 11 is less than 10 minutes, and the hot spot temperature of the heating wire 11 is less than 70°C. This can meet the requirements of the vehicle window assembly in the application scenario of the vehicle vehicle, and can take into account both defrosting efficiency and suppression of hot spot temperature, thereby effectively improving the safety of vehicle driving.

[0076] In one embodiment, the heating wire 11 supports a voltage greater than or equal to 36V.

[0077] Generally, in the prior art, a voltage of 12 to 14V is used to power the heating wire 11, and this power supply scheme is often considered a low voltage scheme; in contrast, a scheme that uses a voltage greater than or equal to 36V to power the heating wire is often considered a high voltage scheme.

[0078] In this embodiment, the heating wire 11 supports a voltage greater than or equal to 36V. By using a high-voltage scheme to enhance the current transmission efficiency, higher power output can be achieved, the heating performance of the heating wire is optimized, and the defrosting time is effectively shortened. This improves the defrosting efficiency of the sensor signal transmission area A and the wiper dwell area B, thereby enhancing driving safety and comfort.

[0079] In one embodiment, the heating wire 11 is used to connect to a voltage of 36V, 48V or 72V, covering multiple voltage levels, so that the heating wire 11 can adapt to different voltage power supply requirements and provide flexible application solutions.

[0080] In this application, please refer to Figures 3-6 The glass body 10 can be laminated glass, which includes a first glass layer 101, an intermediate layer 103, and a second glass layer 102. The intermediate layer 103 is bonded between the first glass layer 101 and the second glass layer 102. The heating wire 11 is fixed between the first glass layer 101 and the sensor 20. Specifically, the first glass layer 101 has a first surface 1011 and a second surface 1012 facing each other, with the second surface 1012 facing the intermediate layer 103. The second glass layer 102 has a third surface 1021 and a fourth surface 1022 facing each other, with the third surface 1021 facing the intermediate layer 103.

[0081] In this application, the first glass layer 101 faces the exterior of the vehicle, the second glass layer 102 faces the interior of the vehicle, and the material of the intermediate layer 103 can be at least one of transparent polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), ionic interlayer (SGP), or polyurethane (PU). The first glass layer 101 serves to protect the internal structure while providing a certain strength and light transmittance to ensure good visibility for the driver; the intermediate layer 103 is preferably PVB, located between the first glass layer 101 and the second glass layer 102, serving as an adhesive and buffer to enhance the impact resistance of the glass.

[0082] Specifically, the heating wire 11 can be disposed on the surface of the first glass layer 101 near the intermediate layer 103, or disposed between the first glass layer 101 and the intermediate layer 103, or disposed on at least one surface of the intermediate layer 103, or disposed between the intermediate layer 103 and the second glass layer 102, or disposed on at least one surface of the second glass layer 102.

[0083] In another possible embodiment of this application, the glass body 10 may also be a single piece of glass, with the heating wire fixed between the glass body 10 and the sensor 20. Specifically, the heating wire 11 may be disposed on the inner surface of the glass body 10. The glass body 10 may be tempered glass, semi-tempered glass, or ordinary glass.

[0084] Please refer again to this application. Figures 1-6 The glass body 10 has a light-transmitting area 110 and a shielding area 120. The visible light transmittance of the light-transmitting area 110 is greater than or equal to 70%, which is beneficial for occupants to observe the external environment through the light-transmitting area. The visible light transmittance of the shielding area 120 is less than or equal to 10%, which is beneficial for shielding, protecting, and improving the overall aesthetics. The shielding area 120 is arranged along the periphery of the glass body 10, and the shielding area 120 avoids the light-transmitting area 110 and the sensor signal transmission area A.

[0085] In one embodiment of this application, the shielding area 120 surrounds the light-transmitting area 110, and the wiper resting area B is located in the shielding area 120 below the light-transmitting area 110; the sensor signal transmission area A is located in the shielding area 120 above the light-transmitting area 110, and the shielding area 120 above the light-transmitting area 110 completely surrounds the sensor signal transmission area A, as shown below. Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown.

[0086] In other possible embodiments of this application, the sensor signal transmission area A is located within the light-transmitting area 110, and the shielding area 120 located above the light-transmitting area 110 partially surrounds the sensor signal transmission area A.

[0087] Please refer again to this application. Figure 4 and Figure 6A shielding layer 104 is provided on the shielding area 120. The shielding layer 104 is located at the periphery of the second surface 1012 of the first glass layer 101 or the third surface 1021 of the second glass layer 102. The shielding layer 104 avoids the sensor signal transmission area A on the laminated glass. The material of the shielding layer 104 is usually ink, used to shield and protect the parts inside the vehicle, preventing them from being damaged by direct sunlight and thus extending their service life. At the same time, the shielding layer 104 can also shield the parts inside the vehicle to ensure the overall aesthetics when viewed from the outside.

[0088] Please refer again to this application. Figures 1-6 The heating wire 11 is also provided in the shielded area 120, and the heating wire of the sensor signal transmission area A is connected to the heating wire of the wiper rest area B through the heating wire of the shielded area 120.

[0089] In one embodiment, the spacing between the heating wires 11 is greater than or equal to 5 mm and less than or equal to 30 mm. The spacing between the heating wires 11 is the gap between two adjacent wire bundles in the heating wire portion that is bent and wound on the same edge of the glass body 10.

[0090] The size of the spacing between the heating wires is mainly related to the range of heat radiation. Specifically, the heat radiation value of a heating wire 11 of a fixed specification is fixed at a certain distance. When the spacing is large, the heat radiation value of some areas on the window glass 1 that are far from the heating wire 11 will be small, resulting in low defrosting efficiency in some areas and poor defrosting and defogging effect of the window glass 1. When the spacing is small, the heat radiation value of some areas on the window glass 1 that are close to the heating wire 11 will be large, which will cause the hot spot temperature to be too high.

[0091] More specifically, the final value of the spacing between the heating wires 11 can be determined by combining simulation and experimental verification methods. For example, the spacing can be set between 5mm and 30mm. The verification method can be: to conduct experiments on the window glass 1 with multiple sets of heating wires with different spacings, to consider indicators such as heating speed and hot spot temperature, and then select the spacing value with better effect based on the experimental results.

[0092] In this embodiment, the value of the spacing between the heating wires 11 was determined through simulation and experimental verification, so as to ensure heat radiation while eliminating hot spots, so as to ensure that the heating wires 11 can effectively radiate heat and ensure heating uniformity while improving heating efficiency.

[0093] Please refer again to this application. Figure 1 , Figure 2 , Figure 3 and Figure 5 The heating wire of the sensor signal transmission area A extends through the sensor signal transmission area A multiple times; the heating wire of the sensor signal transmission area A includes multiple first segments 111 and first connecting segments 112, and the first segments 111 and the first connecting segments 112 are connected to each other. Each first segment 111 extends along the width direction of the glass body 10, and each first connecting segment 112 extends along the length direction of the glass body 10. Multiple first segments 111 are spaced apart along the length direction of the glass body 10, and each first connecting segment 112 is used to connect the close ends of two adjacent first segments 111.

[0094] Specifically, the number of the first segment 111 is 3 to 10; and / or, along the length direction of the glass body 10, the spacing d1 between two adjacent first segments 111 is 5mm to 30mm, such as... Figure 1 As shown. This is because the distribution density of the first segment 111 affects the heating effect of the heating wire on the sensor signal transmission area A.

[0095] In one embodiment of this application, please refer again. Figure 2 and Figure 3 The heating wire of the wiper stop area B extends through the wiper stop area B multiple times; the heating wire of the wiper stop area B includes multiple second segments 113 and second connecting segments 114, and the second segments 113 and the second connecting segments 114 are connected to each other. Each second segment 113 extends along the width direction of the glass body 10, and each second connecting segment 114 extends along the length direction of the glass body 10. Multiple second segments 113 are spaced apart along the length direction of the glass body 10, and the second connecting segments 114 are used to connect the ends of two second segments 113.

[0096] Specifically, the number of second segments 113 is 3 to 10; and / or, along the length of the glass body 10, the spacing d2 between two adjacent second segments 113 is 5 mm to 30 mm, such as... Figure 2 As shown. This is because the distribution density of the second segment 113 affects the heating effect of the heating line 11 on the wiper resting area B.

[0097] In one embodiment, such as Figure 2 and Figure 3 As shown, the two electrodes 12 of the heating wire 11 are disposed in the shielding area 120 above the light-transmitting area 110. Since the shielding area 120 above the light-transmitting area 110 is disposed at the top of the window glass 1, the two electrodes 12 are in a high position, which can reduce interference with the vehicle's forward visibility.

[0098] Specifically, such as Figure 2 As shown, the heating wire 11 can be arranged around the light-transmitting area 110; as Figure 3As shown, the heating wire 11 can partially surround the light-transmitting area 110.

[0099] In one embodiment, such as Figure 5 As shown, the two electrodes 12 of the heating wire 11 are positioned in the shielded area 120 below the light-transmitting area 110, avoiding the wiper resting area B. This allows the heating wire 11 to be hidden in the interior trim below the window glass 1, thus preventing the external wires of the heating wire 11 from getting tangled with cables from devices such as cameras or dashcams, which would reduce the design's rationality and aesthetics.

[0100] In another embodiment of this application, please refer again. Figure 1 The heating wire in the wiper rest area B includes two heating segment groups 115, which are arranged opposite each other along the length of the glass body 10. Each heating segment group 115 includes multiple third segments 1151 and third connecting segments 1152. Each third segment 1151 extends along the width of the glass body 10, and each third connecting segment 1152 extends along the length of the glass body 10. The multiple third segments 1151 are spaced apart along the length of the glass body 10, and the third connecting segments 1152 are used to connect the ends of two third segments 1151. In this case, the two electrodes 12 of the heating wire 11 are located in the wiper rest area B, allowing the heating wire 11 to be hidden in the interior trim below the windshield 1, thus avoiding the external wires of the heating wire 11 from being tangled with cables from devices such as cameras or dashcams, reducing the rationality and aesthetics of the design.

[0101] Specifically, the number of the third segment 1151 is 3 to 10. Preferably, the number of the third segment 1151 is 3 to 6, so that the wiper rest area B covers the range between 15mm and 25mm above and below the wiper. More preferably, the number of the third segment 1151 is 4 or 6. This is because the two electrodes 12 are set in the wiper rest area B, and the heating wire of the wiper rest area B is a loop, so an even number is required.

[0102] In addition, the heating wire in the wiper resting area also includes a fourth segment 116, which connects the two heating segment groups 115 to form a complete heating wire circuit.

[0103] Specifically, along the length of the glass body 10, the distance d3 between two adjacent third segments 1151 is 5mm to 30mm, such as... Figure 1 As shown. This is because the distribution density of the third segment 1151 in each heating segment group 115 affects the heating effect of the heating wire on the wiper resting area B.

[0104] In this application, the positions of the two electrodes 12 include, but are not limited to, being located in any of the following areas: the shielding area 120 above the light-transmitting area 110, the shielding area 120 below the light-transmitting area 110, or the wiper resting area B. Generally, the shielding area 120 above the light-transmitting area 110 is located at the top of the window glass, and the wiper resting area B is located at the bottom of the window glass. Based on this, when the two electrodes of the heating wire 11 are located in the shielding area 120 above the light-transmitting area 110, interference with the vehicle's forward visibility can be reduced. Compared to placing the two electrodes in the wiper resting area B, the two electrodes are at a higher position, minimizing the impact on the visibility of the road ahead. Placing the two electrodes 12 of the heating wire 11 in the wiper resting area B or the shielding area 120 below the light-transmitting area 110 allows the heating wire 11 to be hidden in the interior trim below the window glass 1, thereby preventing the external wires of the heating wire 11 from being tangled with cables from devices such as cameras or dashcams, thus reducing the rationality and aesthetics of the design.

[0105] In one embodiment, the two electrodes 12 can be formed by coating with conductive silver paste, or they can be conductive copper foil, or conductive aluminum foil, etc.

[0106] In one embodiment, the distance between the positions of the two electrodes 12 and the edge of the glass body 10 is greater than 50 mm; and / or, the distance between the two electrodes 12 is greater than 10 mm.

[0107] The periphery of the window glass 1 is a stress zone. To ensure the stability of the window glass structure, the welding joint of the heating wire 11 should be located as far away from the stress zone as possible. Specifically, the stress zone is usually located within 50mm of the edge of the window glass 1. Therefore, the welding joint between the two electrodes 12 and the heating wire 11 should be located at least 50mm away from the edge of the window glass 1.

[0108] Furthermore, the two electrodes 12 of the heating wire 11 typically generate stress zones that interfere with each other, potentially leading to glass cracking. In one test case, multiple sets of vehicle windows were tested with different electrode gaps, provided the heating wires had the same wire width, material, length, and voltage. The cracking patterns of these windows were recorded during testing, yielding the results. The results showed that when the gap between the two electrodes was greater than 10 mm, the frequency of glass cracking was lower; therefore, a gap greater than 10 mm was recommended.

[0109] In addition, if the distance between the two electrodes 12 and the edge of the glass cannot meet the requirement of more than 50mm, it is necessary to assess the impact of the stress range within the range of 30 to 50mm on the glass cracking problem, and then verify the safety of the car window glass between 30mm and 50mm through experiments. If the test results show that the impact of the glass cracking problem is within an acceptable range, the distance between the setting position of the two electrodes 12 and the edge of the glass body 10 can be set between 30mm and 50mm.

[0110] In this embodiment, by positioning the welded joint away from the stress zone around the glass, the risk of glass cracking due to stress concentration is reduced, thus avoiding negative impacts on the stability of the glass structure. Simultaneously, setting a specific gap between the two electrodes effectively reduces the risk of window glass cracking, thereby improving the reliability and safety of the window glass.

[0111] In one embodiment, the two electrodes are circular; or, the two electrodes are elliptical; or, the two electrodes are rounded rectangles with a chamfer radius greater than 3 mm.

[0112] The shape of the two electrodes affects the stress state of the glass surrounding them. Firstly, circular or elliptical electrodes enhance the stability of the window glass. Rectangular electrodes, however, experience excessive stress changes at their four corners due to heat accumulation during molding, making them prone to cracking. Therefore, chamfers of more than 3mm can be made at the four corners of rectangular electrodes to reduce stress variations; these chamfers are rounded corners with a radius of 3mm. Alternatively, the electrodes can also be elliptical or other shapes that enhance stability.

[0113] In this embodiment, by optimizing the shape of the two electrodes, the problem of stress concentration caused by heat collection at the corner is alleviated, the stress change rate around the window glass is significantly reduced, the risk of cracking is reduced, and the product service life is extended.

[0114] In one embodiment, the heating wire 11 includes a single conductor; or, the heating wire includes at least two conductors connected in parallel.

[0115] Regarding the design of the heating wire, this application provides two solutions: a single-wire solution and a multi-wire solution. The single-wire solution refers to a heating wire consisting of a single conductor, while the multi-wire solution refers to a heating wire consisting of multiple conductors connected in parallel.

[0116] Generally, the size of the area to be heated on the car window glass affects the total power of the heating wire to be designed. When the area to be heated is large, the power requirement is large, and a multi-wire solution can be selected; when the area to be heated is small, the power requirement is small, and a single-wire solution can be selected.

[0117] More specifically, the larger the area of ​​the car window glass, the larger the area that needs to be heated, the larger the area available for wiring, and the greater the total power required for the heating wires. In this case, a parallel wiring method can be selected to improve the overall heating power, ensure rapid and effective heating, and improve the efficiency of defrosting and defogging. Conversely, the smaller the area of ​​the car window glass, the smaller the area that needs to be heated, and the smaller the total power required for the heating wires. A single-wire design can be selected to reduce energy consumption and material costs.

[0118] In one embodiment, when the heating wire includes a single conductor, the length of the conductor is greater than or equal to 4000 mm; or, when the heating wire includes at least two conductors, the length of each conductor is greater than or equal to 2000 mm. Preferably, when the heating wire includes a single conductor, the length of the conductor is greater than or equal to 6000 mm; or, when the heating wire includes at least two conductors, the length of each conductor is greater than or equal to 3500 mm.

[0119] The case where the heating wire includes one conductor corresponds to the single conductor scheme, and the case where the heating wire includes at least two conductors corresponds to the multi-conductor scheme.

[0120] Generally, given a fixed heating wire resistance, a shorter heating wire requires a finer wire width and a higher sheet resistance, increasing the difficulty of heating wire manufacturing. Therefore, the longer the heating wire, the better. Sheet resistance is the resistance per unit cross-sectional area and is related to the silver content in the silver paste. The higher the silver content, the lower the sheet resistance, resulting in a lower overall heating wire resistance and ultimately, greater power output.

[0121] Based on the above principles, in a test case, under the same wire width, material, and voltage for the heating wire, the suitable minimum heating wire length was determined by separately testing the single-wire scheme and the double-wire scheme (one of the multiple-wire schemes). The minimum heating wire length corresponding to the single-wire scheme was 4000 mm, and the minimum heating wire length corresponding to the double-wire scheme was 2000 mm. Therefore, it was determined that in the single-wire scheme, the wire length is greater than or equal to 4000 mm, and in the multiple-wire scheme, the wire length is greater than or equal to 2000 mm.

[0122] In this embodiment, the heating wire design adopts a single wire or multiple wire scheme. By testing these two schemes separately, it is ensured that the length and width of the heating wire meet the power density design requirements. The appropriate wire length design avoids the situation where thin wires are required due to excessively short wires, thereby avoiding the problem of increased heating wire printing process costs caused by excessively narrow wiring, and thus reducing the production cost of automotive window glass.

[0123] In one embodiment, the line width of heating wire 11 is greater than or equal to 0.3 mm. Preferably, the width of the heating wire in sensor signal transmission area A is greater than or equal to 0.3 mm and less than or equal to 1 mm; and / or, the width of the heating wire in wiper rest area B is greater than or equal to 0.3 mm and less than or equal to 3 mm. The width of the heating wire in sensor signal transmission area A has a certain impact on the signal transmission of sensor 20. To ensure the signal transmission of sensor 20, the width of the heating wire in sensor signal transmission area A needs to be set to be greater than or equal to 0.3 mm and less than or equal to 1 mm; the width of the heating wire in wiper rest area B can be set to be greater than or equal to 0.3 mm and less than or equal to 3 mm. Furthermore, the width of the heating wire needs to be determined in conjunction with the power and voltage used by the heating wire. To ensure that the printing requirements of different areas are met, appropriate line widths can be set for different areas (such as sensor signal transmission area A and wiper rest area B) to simplify the printing process.

[0124] In one embodiment, the heating wire 11 is arranged in shapes such as curves, broken lines, and straight lines, and can be adjusted according to the specific arrangement. The silver content used in the heating wire 11 needs to be adjusted according to specific requirements, such as 30%, 50%, 60%, 80%, etc., and can be adjusted to any ratio using a diluent to effectively meet the heating requirements of the heating wire 11. Among them, silver has better conductivity than other materials, so the higher the silver content of the heating wire 11, the lower the resistance and the larger the current, resulting in faster heating efficiency and a faster temperature rise.

[0125] In one embodiment, the heating wire 11 avoids the rain sensor area C to prevent physical obstruction of the rain sensor signal. Preferably, the heating wire 11 is partially disposed around the outside of the rain sensor area C. Specifically, the distance between the heating wire 11 and the rain sensor area C is greater than or equal to 30 mm.

[0126] In one embodiment, the heating wire 11 is disposed on the inner side of the glass body 10, and a cover layer 105 is provided on the side of the heating wire 11 away from the glass body 10. The cover layer 105 is a printed ink layer. Specifically, when the glass body 10 is laminated glass, the shielding layer 104 is disposed on the second surface 1012 of the first glass layer 101 or on the third surface 1021 of the second glass layer 102, the heating wire 11 is disposed on the fourth surface 1022 of the second glass layer 102, and a printed ink layer is provided on the side of the heating wire 11 away from the fourth surface 1022 of the second glass layer 102. Figure 6 As shown. An ink coating layer is printed on the heating wire 11 to prevent the heating wire 11 from reacting with the bracket adhesive in the sensor signal transmission area A, which could cause functional failure. It also prevents the silver paste heating wire from leaking out. The bracket adhesive refers to the adhesive used to fix or support the various structural components of the glass, such as polyurethane adhesives used to fix the bracket.

[0127] In one embodiment, a heating scheme for the designed vehicle window glass can be tested, and the test results can be used to determine whether the window glass meets the factory requirements. Specifically, the test data is shown in Table 2 below. Table 2

[0128]

[0129] As shown in Table 2, the vehicle window glass provided in this application embodiment meets the requirements for hot spot temperature and defrosting efficiency of vehicle window glass at both normal temperature and ambient temperature of -18℃.

[0130] In another embodiment, this application also provides a window assembly, including: a window glass 1 as in any of the above embodiments, a sensor 20, and a windshield wiper (not shown in the figure), wherein the sensor 20 is located inside the vehicle and faces the sensor signal transmission area A; the windshield wiper is located outside the vehicle and can stay in the windshield wiper stopping area B.

[0131] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0132] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0133] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A vehicle window glass, characterized in that: include: a glass body having a sensor signal transmission area and a wiper stop area; A heating wire, which is provided in the sensor signal transmission area and the wiper stop area; Wherein, the heating wire in the sensor signal transmission area and the heating wire in the wiper stop area are connected in series.

2. The vehicle window glass according to claim 1, characterized in that: The power density corresponding to the heating line in the wiper stop area is greater than or equal to 1000W / ㎡ and less than or equal to 2500W / ㎡, and / or the power density corresponding to the heating line in the sensor signal transmission area is greater than or equal to 500W / ㎡ and less than or equal to 1500W / ㎡.

3. The vehicle window glass according to claim 1, characterized in that: The heating wire supports access to a voltage greater than or equal to 36V.

4. The vehicle window glass according to claim 3, characterized in that: The heating wire is used to access a voltage of 36V, 48V or 72V.

5. The vehicle window glass according to claim 1, characterized in that: The glass body has a shielding area and a light-transmitting area, the visible light transmittance of the light-transmitting area is greater than or equal to 70%, and the visible light transmittance of the shielding area is less than or equal to 10%, the shielding area is arranged along the periphery of the glass body, and the shielding area avoids the light-transmitting area and the sensor signal transmission area; The shielding area surrounds the light-transmitting area, and the wiper stop area is located in the shielding area below the light-transmitting area; The sensor signal transmission area is located in the shielding area above the light-transmitting area, and the shielding area above the light-transmitting area completely surrounds the sensor signal transmission area, or, The sensor signal transmission area is located in the light-transmitting area, and the shielding area located above the light-transmitting area partially surrounds the sensor signal transmission area.

6. The vehicle window glass according to claim 5, characterized in that: The heating wire is also arranged in the shielding area, and the heating wire in the sensor signal transmission area is connected to the heating wire in the wiper stop area through the heating wire in the shielding area.

7. The vehicle window glass according to claim 6, characterized in that: The heating wire of the sensor signal transmission area extends through the sensor signal transmission area multiple times; The heating line in the sensor signal transmission area includes multiple first segments and first connecting segments, and the first segments and the first connecting segments are connected to each other, wherein each first segment extends along the width direction of the glass body, and each first connecting segment extends along the length direction of the glass body, and multiple first segments are arranged at intervals along the length direction of the glass body, and each first connecting segment is used to connect the mutually close ends of two adjacent first segments.

8. The vehicle window glass according to any one of claims 7, characterized in that: The heating wire of the wiper stop area extends through the wiper stop area multiple times; The heating line of the wiper stop area includes multiple second segments and second connecting segments, and the second segments and the second connecting segments are connected to each other, wherein each second segment extends along the width direction of the glass body, each second connecting segment extends along the length direction of the glass body, multiple second segments are arranged at intervals along the length direction of the glass body, and the second connecting segment is used to connect the ends of two second segments.

9. The vehicle window glass according to claim 8, characterized in that: The two electrodes of the heating line are arranged in the shielding area above the light-transmitting area; or, The two electrodes of the heating wire are arranged in the shielding area below the light-transmitting area, avoiding the wiper stop area.

10. The vehicle window glass according to claim 7, characterized in that: The number of the first segments is 3 to 10; and / or, along the length direction of the glass body, the distance d1 between two adjacent first segments is 5 mm to 30 mm.

11. The vehicle window glass according to claim 8, characterized in that: The number of the second segments is 3 to 10; and / or, along the length direction of the glass body, the distance d2 between two adjacent second segments is 5 mm to 30 mm.

12. The vehicle window glass according to claim 7, characterized in that: The heating line in the wiper stop area includes two heating segment groups, and the two heating segment groups are arranged opposite to each other along the length direction of the glass body; Each of the heating segment groups comprises a plurality of third segments and a third connecting segment, wherein each of the third segments extends along the width direction of the glass body, each of the third connecting segments extends along the length direction of the glass body, a plurality of the third segments are arranged at intervals along the length direction of the glass body, and the third connecting segment is used to connect the ends of two of the third segments; The heating line of the wiper stop area also includes a fourth section, and the fourth section connects the two heating section groups.

13. The vehicle window glass according to claim 12, characterized in that: The two electrodes of the heating wire are arranged in the wiper stop area.

14. The vehicle window glass according to claim 12, characterized in that: The number of the third segments is 3 to 10; and / or, along the length direction of the glass body, the distance d3 between two adjacent third segments is 5 mm to 30 mm.

15. The vehicle window glass according to claim 9 or 13, characterized in that: The distance between the locations where the two electrodes are disposed and the edge of the glass body is greater than 50 mm; and / or the distance between the two electrodes is greater than 10 mm.

16. The vehicle window glass according to claim 9 or 13, characterized in that: The two electrodes are circular in shape; or; the two electrodes are elliptical in shape; or, the two electrodes are rounded rectangles, and the chamfer radius of the rounded rectangles is greater than 3 mm.

17. The vehicle window glass according to claim 1, characterized in that: The width of the heating line in the sensor signal transmission area is greater than or equal to 0.3 mm and less than or equal to 1 mm; and / or, The width of the heating line in the wiper stop area is greater than or equal to 0.3 mm and less than or equal to 3 mm.

18. The vehicle window glass according to any one of claims 1 to 14 or 17, characterized in that: The heating wire includes one conducting wire; or, the heating wire includes at least two conducting wires, and the at least two conducting wires are connected in parallel.

19. The vehicle window glass according to claim 18, characterized in that: When the heating wire includes one conductor, the length of the conductor is greater than or equal to 4000 mm; or, when the heating wire includes at least two conductors, the length of the single conductor is greater than or equal to 2000 mm.

20. The vehicle window glass according to claim 1, characterized in that: The heating line is arranged on the inner side of the glass body, and a covering layer is arranged on the side of the heating line away from the glass body; The covering layer is a printing ink layer.

21. The vehicle window glass according to claim 1, characterized in that: The heating line is a printed silver paste line.

22. The vehicle window glass according to claim 1, characterized in that: The heating wire portion is disposed outside the rain sensor area, and a distance between the heating wire and the rain sensor area is greater than or equal to 30 mm.

23. A vehicle window assembly, characterized in that: include: The vehicle window glass as claimed in any one of claims 1 to 22; A sensor located inside the vehicle and facing the sensor signal transmission area; The windshield wiper is located outside the vehicle and can be stopped in the windshield wiper stopping area.

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