Thin film heating sheet capable of exhausting air

Abstract

The utility model discloses a thin film heating sheet capable of exhausting air. The thin film heating sheet comprises a heating sheet body, a bonding pad and a plurality of hollows, the heating sheet body is in a sheet shape and is an insulator; the bonding pad is arranged on the heating sheet body; the plurality of hollows are uniformly distributed on the heating sheet body, and the hollows are not overlapped with the bonding pads in position. The technical hollows are uniformly formed in the film heating sheet, so that the problem that bubbles are generated in the curing process of the GD414C single-component room-temperature vulcanized silicone rubber is solved. Therefore, the reworking phenomenon and the rejection rate caused by bubbles are reduced, the production cost is reduced, the production efficiency is improved, the product quality control is improved, and remarkable practical value and economic benefits are brought to the field of spacecraft thermal control implementation. And meanwhile, the stability and reliability of the thermal control system can be ensured, and the performance and safety of the whole spacecraft are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerospace, and particularly relates to an exhaustible thin film heating sheet. Background Art

[0002] In the thermal control implementation of space spacecrafts, the application of thin film heating sheets is particularly crucial. Due to the extremity of the space environment, spacecrafts face severe temperature challenges, such as extremely cold cosmic background radiation and drastic changes in solar radiation. These temperature fluctuations pose a serious threat to the normal operation and performance stability of spacecrafts. Therefore, precise and reliable temperature control of spacecrafts is particularly important. Thin film heating sheets become an ideal choice in thermal control implementation due to their unique advantages. Thin film heating sheets are made of lightweight materials and have excellent flexibility and conformability. They have high heating efficiency and fast response speed to cope with the rapid changes in the external environment. They also have excellent reliability and stability and can operate stably in extreme environments for a long time to ensure the safety and reliability of spacecrafts. The thermal control implementation of heating sheets is usually completed by coating GD414c to bond the heating sheets. During coating, GD414c will volatilize gas, especially when processing products with complex shapes and large sizes and areas, it will seriously affect the flatness of the products, thereby reducing the product qualification rate.

[0003] Specifically, from the time of coating until GD414 loses effective fluidity, spreading and leveling occur. Spreading and leveling are surface flows caused by surface tension. This surface flow has high requirements for bubbles in the thin film heating sheet. Incomplete leveling will form coating defects, resulting in a large amount of rework. Moreover, the bubbles generated by GD414c during the coating process cannot be discharged, causing local bubbling after heating, thus affecting the overall product quality control. Summary of the Utility Model

[0004] According to an embodiment of the utility model, to solve the above deficiencies of the prior art, an exhaustible thin film heating sheet is provided, which includes a heating sheet body, pads, and a plurality of hollowings; the heating sheet body is in a thin sheet shape and is an insulator; the pads are arranged on the heating sheet body; the plurality of hollowings are evenly distributed on the heating sheet body, and the positions of the hollowings do not coincide with those of the pads.

[0005] Preferably, the plurality of hollowings are evenly distributed in different regions of the heating sheet body, and the plurality of hollowings are not arranged at the edge of the heating sheet body.

[0006] Preferably, the hollowings are arranged in a matrix.

[0007] Preferably, the heating sheet body is rectangular, and one side of the matrix-shaped hollowings is parallel to the edge of the rectangular heating sheet body.

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

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

[0010] Preferably, it further includes an opening, and a plurality of hollows are through holes with a diameter of 1 mm.

[0011] Preferably, the distance between a plurality of through holes is 30 mm.

[0012] Preferably, the heating sheet body is adhered to the external use device through an adhesive, and the adhesive is GD414 neutral one-component room temperature vulcanizing silicone rubber.

[0013] Preferably, the heating sheet body is polyimide.

[0014] According to the exhaustible film heating sheet of the embodiment of the present invention, by uniformly opening process hollows on the film heating sheet, the problem of air bubbles generated during the curing process of GD414C one-component room temperature vulcanizing silicone rubber is solved. This not only reduces the rework phenomenon and scrap rate caused by air bubbles, reduces the production cost, improves the production efficiency, and enhances the product quality control, but also brings significant practical value and economic benefits to the field of thermal control implementation of space spacecraft. At the same time, it can ensure the stability and reliability of the thermal control system and improve the performance and safety of the entire spacecraft.

[0015] 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 claimed technology. Brief Description of the Drawings

[0016] Figure 1 is the first structural schematic diagram of the exhaustible film heating sheet according to the embodiment of the present invention;

[0017] Figure 2 is the second structural schematic diagram of the exhaustible film heating sheet according to the embodiment of the present invention. Detailed Description of the Embodiments

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the drawings, and the present invention will be further elaborated.

[0019] First, the exhaustible film heating sheet according to the embodiment of the present invention will be described in combination with Figure 1 、 2 and is widely used in scenarios such as aerospace instruments, medical devices, and industrial equipment. In this embodiment, the thermal control implementation in the aerospace field and the satellite thermal control implementation scenario are taken as examples for illustration.

[0020] As Figure 1 、 2As shown, the exhaustible film heating sheet of the embodiment of the present utility model includes a heating sheet body 1, pads 2, and a number of hollowings 3.

[0021] Specifically, as Figure 1 , 2 shown, the heating sheet body 1 is in a thin sheet shape. The heating sheet body 1 adopts a thin sheet design. The heating sheet body 1 is an insulator, ensuring that it has good heat conduction performance and can distribute heat quickly and evenly. At the same time, as an insulator, it can effectively prevent electrical short circuits and ensure the safety of use; the pads 2 are arranged on the heating sheet body 1. By adaptively adjusting and designing the position and quantity of the pads 2, the electrical performance of the heating sheet can be optimized, and the heating efficiency and safety can be improved; the hollowings 3 are arranged on the heating sheet body. The design of the hollowings 3 can ensure that the bubbles volatilized during the curing process of GD414C are discharged smoothly, avoiding the bubbling and damage phenomena caused by the accumulation of bubbles inside the heating sheet. This not only reduces the rework phenomenon and scrap rate caused by bubbles, lowers the production cost, improves the production efficiency, but also enhances the product quality control. The hollowings 3 do not coincide with the pads 2, that is, with the positions of the circuits designed on the heating sheet, which can avoid damaging the heating sheet or affecting the performance of the pads 2 during the welding process.

[0022] Preferably, a number of hollowings 3 are arranged outside the pads 2 and not at the edge of the heating sheet body 1. While optimizing the heat distribution and realizing the exhaust function, it can avoid the edge breakage caused by arranging the hollowings 3 at the edge of the heating sheet body 1. As Figure 1 , 2 shown, the pads can be adaptively designed according to different product requirements, and the arrangement of the hollowings is adjusted accordingly according to the shape of the pads. However, all are designed according to this scheme at positions where the pads do not coincide, and the edge positions are avoided between the pads, which can improve the durability and reliability of the heating sheet.

[0023] Preferably, as Figure 1 , 2 shown, the hollowings 3 are arranged in a matrix. The hollowings 3 arranged in a matrix can ensure that the bubbles generated during the curing process of the heating sheet can be discharged evenly and quickly, avoiding the accumulation of bubbles in a certain area. This arrangement also helps to optimize the heat distribution of the heating sheet and indirectly improve the performance of the thermal control system.

[0024] Preferably, as Figure 1 shown, the heating sheet body 1 is rectangular, and one side of the matrix-shaped hollowings 3 is parallel to the edge of the rectangular heating sheet body 1. By making one side of the matrix-shaped hollowings 3 parallel to the edge of the rectangular heating sheet body 1, the hollowings 3 can be distributed more neatly and orderly, improving the aesthetics and practicality of the heating sheet. At the same time, this arrangement also helps to reduce material waste and lower the production cost.

[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 cross-section of the hollow 3 is designed as a circle or a rectangle, it can ensure that the bubbles can be discharged smoothly, while reducing material waste and processing difficulty.

[0026] Preferably, as Figure 1 shown, a number of the hollows 3 are through holes with a diameter of 0.8 mm to 2 mm, which can ensure that the bubbles can be discharged smoothly, while avoiding material waste and strength reduction caused by too large through holes. The through holes within this size range can not only meet the exhaust requirements but also maintain the overall strength and stability of the heating sheet.

[0027] Preferably, it further includes an opening, and a number of the hollows 3 are through holes with a diameter of 1 mm, which can further improve the exhaust efficiency and achieve better results.

[0028] Preferably, as Figure 1 shown, the distance between a number of the through holes is 30 mm. Setting the distance between the through holes to 30 mm can ensure that enough exhaust channels are formed on the heating sheet, while avoiding material waste and increased processing difficulty caused by too dense through holes. This distance setting can optimize the heat distribution of the heating sheet while ensuring the exhaust effect.

[0029] Preferably, the heating sheet body 1 is adhered to the external usage device through an adhesive. The adhesive is GD414 neutral one-component room temperature vulcanized silicone rubber, ensuring a stable connection between the heating sheet and the external usage device. This adhesive has good properties such as high temperature resistance, low temperature resistance, and chemical corrosion resistance, and can adapt to various complex usage environments.

[0030] Preferably, the heating sheet body 1 is polyimide. Polyimide is a high-performance insulating material with excellent high temperature resistance, chemical corrosion resistance, and electrical insulation properties. Using polyimide as the material of the heating sheet body 1 can ensure the stability and reliability of the heating sheet in harsh environments such as high temperature and high humidity.

[0031] During use, a reasonable hollow structure is designed to optimize the heat distribution of the heating sheet. At the same time, the hollow 3 structure is used as a gas discharge channel to solve the problem of bubbles generated during the curing process of the GD414C adhesive. During the hot pressing process, through the action of uniform temperature and constant pressure, the film heating sheet forms a tight structure. During the preparation, first, the circuit pattern design is carried out. According to the shape, size, and processing process parameters of the product, the heating sheet circuit diagram with an opening structure is optimized and designed. Then, the circuit is made, and the designed circuit pattern is processed on the constantan foil by the etching method to ensure the integrity and accuracy of the circuit. The hot pressing treatment is carried out, and the film heating sheet is hot pressed under the conditions of uniform temperature and constant pressure to make it form a tight structure, ensuring the stability and reliability of the heating sheet during use.

[0032] As described above, with reference to Figure 1 Figure 1

[0033] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] It should be noted that in this specification, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or further elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0035] Although the content of the present utility model has been introduced in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation to the present utility model. After those skilled in the art have read the above content, various modifications and alternatives to the present utility model will be obvious. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims

1. An exhaust thin film heater, 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; A plurality of hollows are evenly distributed on the heating sheet, and the positions of the hollows and the solder pads do not overlap.

2. The exhaust thin film heater according to claim 1, characterized in that: The plurality of hollows are evenly distributed in different areas of the heating plate body, and the plurality of hollows are not arranged at the edge of the heating plate body.

3. The exhaust thin film heater according to claim 2, characterized in that: The hollows are arranged in a matrix shape.

4. The exhaust thin film heater according to claim 3, characterized in that: The heating plate body is rectangular, and one side of the matrix-shaped hollowing is parallel to the edge of the rectangular heating plate body.

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

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

7. The exhaust thin film heater according to claim 6, characterized in that: It also includes openings, and the plurality of hollows are through holes with a diameter of 1 mm.

8. The exhaust thin film heater according to claim 7, characterized in that: The spacing between the plurality of through holes is 30 mm.

9. The exhaust thin film heater according to claim 1, wherein: The heating plate body is adhered to the external device through an adhesive, and the adhesive is GD414 neutral single-component room temperature vulcanized silicone rubber.

10. The exhaust thin film heater according to claim 1, wherein: The heating plate body is made of polyimide.

Images