Film heating sheet

Abstract

The utility model discloses a film heating sheet, which comprises a heating sheet body, a bonding pad and at least one hollow part, the heating sheet body is in a sheet shape and is an insulator; the bonding pad is arranged on the heating sheet body; the hollowed-out parts are arranged on the heating sheet body and do not coincide with the bonding pads in position. According to the utility model, the stress concentration of the bonding pad area is effectively dispersed, the pressure is uniform, the stress is released, and especially the problem of edge warping of the periphery of the bonding pad is relieved, so that the flatness of a product is greatly improved. Due to the design, the heating sheet can ensure uniform gluing in subsequent thermal control implementation, the local overheating phenomenon is avoided, and the service life of the heating sheet is prolonged. According to the technical scheme, the implementation process is simple and efficient, good manufacturability is achieved, and the consistency and stability of products are effectively guaranteed. Particularly in a thermal control system of a spacecraft, extremely high requirements on flatness and stability are achieved, the stability and the reliability of the thermal control system can be ensured, and the performance and the safety of the spacecraft are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerospace, and in particular to a thin film heating sheet. Background Art

[0002] With the rapid development of aerospace, electronic information and medical technology, electric heating products have become an indispensable part of the thermal control field, among which polyimide film heaters are highly favored due to their excellent performance. However, in the processing and manufacturing process of film heaters, the flatness problem of the product has gradually become prominent, becoming a key factor restricting its application effect.

[0003] Specifically, the flatness of the thin-film heater is directly related to the convenience and efficiency of the subsequent thermal control implementation. Although traditional processing methods, such as high-temperature heating and pressure forming, can achieve product forming to a certain extent, the uneven distribution of temperature and pressure inside the material causes the pad area to easily warp. In addition, the traditional wire welding method, that is, welding multiple wires side by side, not only increases the difficulty and cost of welding, but also easily produces stress concentration at the welding point, further exacerbating the unevenness of the product.

[0004] The unevenness of the thin-film heater will directly affect the performance and service life of the heater. In the subsequent thermal control implementation process, the uneven heater will lead to uneven glue coating, which will cause the heater to overheat locally during operation. This will not only reduce the heating efficiency of the heater, but also accelerate its aging process, which will have a negative impact on the service life of the heater. Therefore, improving the flatness of the thin-film heater has become an urgent problem to be solved. Utility Model Content

[0005] According to an embodiment of the utility model, in order to solve the above-mentioned deficiencies in the prior art, a thin film heating plate is provided, comprising a heating plate body, a soldering pad, and at least one hollowing; the heating plate body is in the shape of a thin sheet, and the heating plate body is an insulator; the soldering pad is arranged on the heating plate body; the hollowing is arranged on the heating plate body, and the position of the hollowing and the soldering pad do not overlap.

[0006] Preferably, the heating sheet is provided with a plurality of hollows, and the plurality of hollows are arranged outside the soldering pad and arranged circumferentially along the soldering pad.

[0007] Preferably, the heating plate body is rectangular, and the hollow portion is provided on one side of the rectangle.

[0008] Preferably, the hollow cross-section is circular or rectangular.

[0009] Preferably, the plurality of hollows are through holes with a diameter of 0.8 mm to 2 mm.

[0010] Preferably, it further comprises an opening, one end of the opening is connected to the hollowing, and the other end of the opening is connected to the edge of the heating plate body.

[0011] Preferably, the opening is a strip-shaped groove, and two ends of the strip-shaped groove are respectively connected to the hollow and the edge of the heating plate body.

[0012] Preferably, the heating plate body is rectangular, and the central axis of the strip groove and the edge of the heating plate body connected to the strip groove are perpendicular to each other.

[0013] Preferably, the width of the strip groove is 0.5-0.8 mm.

[0014] Preferably, the heating plate body is polyimide.

[0015] The thin film heater according to the embodiment of the utility model can effectively disperse the stress concentration in the pad area, disperse the stress, and evenly distribute the pressure, especially alleviate the problem of warping around the pad, thereby greatly improving the flatness of the product. This design enables the heater to ensure uniform glue coating in the subsequent thermal control implementation, avoid local overheating, and extend the service life of the heater. The implementation process of this technical solution is simple and efficient, has good processability, and effectively guarantees the consistency and stability of the product. Especially in the thermal control system of spacecraft, there are extremely high requirements for the flatness and stability of the product. The heater of the utility model has excellent flatness and stability, which is very suitable for the needs of spacecraft thermal control implementation, can ensure the stability and reliability of the thermal control system, and improve the performance and safety of the entire spacecraft.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the first structure of a thin film heating sheet according to an embodiment of the utility model;

[0018] Figure 2 It is a second structural schematic diagram of the thin film heating plate according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0020] First, combine Figure 1 , 2 Description The thin film heater according to the embodiment of the utility model is widely used in aerospace instruments, medical equipment, industrial equipment and other scenarios. In this embodiment, the thermal control implementation scenario in the aerospace field is taken as an example for description.

[0021] like Figure 1 , 2As shown, the thin film heater of the embodiment of the present invention comprises a heater body 1 , a solder pad 2 , and at least one hollow 3 .

[0022] Specifically, Figure 1 , 2 As shown, the heating plate body 1 is in the shape of a thin sheet. The thin sheet design not only makes the heating plate lighter and easier to install, but also improves its flexibility and adaptability, so that it can be attached to surfaces of various shapes to achieve uniform heating. The heating plate body 1 is an insulator. The design of the insulator ensures that the heating plate will not cause electrical interference or damage to the surrounding environment and equipment when powered on; the pad 2 is arranged on the heating plate body 1, and the pad 2 serves as an interface between the heating plate and the external circuit, ensuring the electrical connection stability between the heating plate and the external device; the hollow 3 is arranged on the heating plate body, which enhances the heat dissipation performance while dispersing stress, uniform pressure, and effectively releasing stress, greatly improving the flatness of the product, especially alleviating the problem of warping around the pad 2. The position of the hollow 3 does not overlap with the pad 2. The position of the hollow 3 does not overlap with the pad 2, which can avoid damaging the heating plate or affecting the performance of the pad 2 during welding.

[0023] Preferably, the heating sheet is provided with a plurality of hollows 3, which are arranged outside the pad 2 and arranged circumferentially along the pad 2. The hollows 3 are arranged circumferentially along the pad 2, which is conducive to uniform distribution of pressure, while not affecting the performance of the pad 2 itself, and can better disperse stress and improve flatness. In addition, being arranged circumferentially is conducive to processing. Figure 1 , 2 As shown, the pads can be adaptively designed according to the needs of different products, and the arrangement of the hollows is adjusted accordingly according to the shape of the pads. However, according to this solution, the pads are designed in a position where they do not overlap. When they are located on the outside, the flatness effect is better and the processing cost is lower.

[0024] Preferably, if Figure 1 As shown, the heating plate body 1 is a rectangle, and the hollow 3 is arranged on one side of the rectangle. Arranging it on the same side can also achieve the effect of dispersing stress and improving flatness. At the same time, the processing cost of one side is low, which is conducive to reducing costs.

[0025] Preferably, the cross-section of the hollow 3 is circular or rectangular, and other regular or irregular shapes can also be adaptively opened. When the hollow 3 is designed to be circular or rectangular in cross-section, it has better structural strength and is conducive to structural stability. In addition, other shapes can be adjusted accordingly according to the specific requirements of the heating plate.

[0026] Preferably, if Figure 1 , 2As shown, several hollows 3 are through holes with a diameter of 0.8 mm to 2 mm. Hollows 3 with too small a diameter may be detrimental to heat dissipation, effective pressure dispersion, and poor flatness effect, while hollows 3 with too large a diameter may reduce the structural strength of the heating plate. The diameter range of 0.8 mm to 2 mm is a reasonable compromise.

[0027] Preferably, if Figure 1 , 2 As shown, it also includes an opening 4, one end of the opening 4 is connected to the hollow 3, and the other end of the opening 4 is connected to the edge 11 of the heating plate body 1, which is beneficial to quickly guide the heat to the edge 11 of the heating plate, and is also beneficial to pressure dispersion to alleviate warping and effectively improve flatness.

[0028] Preferably, if Figure 1 As shown, the opening 4 is a strip groove, and the two ends of the strip groove are respectively connected to the hollow 3 and the edge 11 of the heating plate body 1. As a form of opening 4, the strip groove has a good pressure dispersion effect and good structural strength. At the same time, it is simple to process and has low cost.

[0029] Preferably, if Figure 1 As shown, the heating plate body 1 is rectangular, and the central axis of the strip groove and the edge 11 of the heating plate body 1 connected to the strip groove are perpendicular to each other. The vertical design can alleviate the warping effect better than the inclined design.

[0030] Preferably, the width of the strip groove is 0.5-0.8 mm. Narrower strip grooves may not be conducive to uniform heat distribution or pressure dispersion, while wider strip grooves may reduce the structural strength of the heating plate. The width range of 0.5-0.8 mm is a reasonable choice.

[0031] Preferably, the heating plate body 1 is polyimide, which is a high-performance insulating material with excellent high temperature resistance, chemical corrosion resistance and electrical insulation performance. Using polyimide as the material of the heating plate body 1 can ensure the stability and reliability of the heating plate in harsh environments such as high temperature and high humidity.

[0032] When in use, the heater is efficiently and evenly heated, and has good pressure dispersion and stress release performance through fine circuit graphic design, etching method to make circuits, equalizing temperature and hot pressing, and drilling and hollowing 3 treatments. By optimizing the layout of hollowing 3 in circuit graphic design, combining etching technology to accurately manufacture circuits, and then using hot pressing technology to ensure the stability of the heater structure and the efficiency of heat conduction, and finally drilling and hollowing 3 treatments to improve heat dissipation performance, solve the problem of warping, effectively improve flatness, and improve the performance and service life of the heater.

[0033] Above, refer to Figure 1A thin film heater according to an embodiment of the utility model is described, which can effectively disperse the stress concentration in the pad area, disperse the stress, and evenly distribute the pressure, especially alleviate the problem of warping around the pad, thereby greatly improving the flatness of the product. This design enables the heater to ensure uniform glue coating in the subsequent thermal control implementation, avoid local overheating, and extend the service life of the heater. The implementation process of this technical solution is simple and efficient, has good processability, and effectively guarantees the consistency and stability of the product. Especially in the thermal control system of spacecraft, there are extremely high requirements for the flatness and stability of the product. The heater of the utility model has excellent flatness and stability, which is very suitable for the needs of spacecraft thermal control implementation, can ensure the stability and reliability of the thermal control system, and improve the performance and safety of the entire spacecraft.

[0034] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “top”, and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A thin film heating sheet, characterized in that: Include: A heating plate body, wherein the heating plate body is in the shape of a thin sheet and is an insulator; A soldering pad, the soldering pad being arranged on the heating plate body; At least one hollow is provided on the heating sheet, and the position of the hollow does not overlap with the position of the soldering pad.

2. The thin film heater according to claim 1, characterized in that: The heating sheet is provided with a plurality of hollows, and the plurality of hollows are arranged outside the welding pad and arranged along the circumference of the welding pad.

3. The thin film heater according to claim 2, characterized in that: The heating plate body is rectangular, and the hollowing is arranged on one side of the rectangle.

4. The thin film heater according to claim 1, characterized in that: The hollow cross section is circular or rectangular.

5. The thin film heater according to claim 4, characterized in that: The plurality of hollows are through holes with a diameter of 0.8 mm to 2 mm.

6. The thin film heater according to claim 1, characterized in that: It also comprises an opening, one end of which is connected to the hollowing out, and the other end of which is connected to the edge of the heating plate body.

7. The thin film heater according to claim 6, characterized in that: The opening is a strip-shaped groove, and two ends of the strip-shaped groove are respectively connected to the hollow and the edge of the heating plate body.

8. The thin film heater according to claim 7, characterized in that: The heating plate body is rectangular, and the central axis of the strip groove and the edge of the heating plate body connected to the strip groove are perpendicular to each other.

9. The thin film heater according to claim 8, characterized in that: The strip groove has a width of 0.5 to 0.8 mm.

10. The thin film heater according to claim 1, characterized in that: The heating plate body is made of polyimide.

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