CN114143949B - A flexible hydrophobic barrier medium plasma anti-icing device and anti-icing method - Google Patents

Abstract

The flexible hydrophobic barrier medium plasma anti-icing device comprises a bare electrode (1), a hydrophobic coating (4), a middle flexible insulating medium (3), a buried electrode (2) and a lower flexible insulating medium (5) from top to bottom. The plasma surface treatment equipment for the flexible insulating medium in the preparation process comprises a sine wave power supply (6), a switch (11), an upper electrode plate (7), a lower electrode plate (9), an upper insulating plate (8) and a lower insulating plate (10). In addition, a preparation method of the flexible hydrophobic anti-icing plasma anti-icing device is also provided. Under the condition of the same power supply excitation parameters, the invention can obviously reduce the discharge power consumption of the plasma anti-icing device; the plasma discharge is more uniform, the surface temperature distribution is more uniform, and the temperature distortion can not occur; can effectively prevent ice accumulation on the surface of the aircraft body.

Description

A flexible hydrophobic barrier medium plasma anti-icing device and anti-icing method

technical field

The invention relates to the field of plasma technology, in particular to a flexible hydrophobic barrier medium plasma anti-icing device and an anti-icing method.

Background technique

UAV anti-icing technology is closely related to flight safety. When UAVs fly in icy weather conditions, cold water droplets or supercooled rain in precipitation hit the aircraft body, or water vapor directly condenses on the body surface, which will form ice accumulation. Once the UAV accumulates ice, it will affect the aerodynamic shape and electronic sensing at the least, and cause flight accidents or even crashes at the worst. Large-scale aircraft can be deiced by traditional methods such as hot air, electric heating, chemical antifreeze, and machinery. For small and medium-sized UAVs, there is no turbine engine to provide air heat for deicing, and mechanical deicing will change the shape and load of the fuselage. Therefore, it is urgent to develop anti-icing methods with small loads and low energy consumption. Based on the rapid heating effect, discharge plasma has significant technical advantages in anti-icing, but the anti-icing effect area of the surface dielectric barrier discharge currently used is small, and cannot meet the high-efficiency anti-icing requirements.

Contents of the invention

In order to overcome the deficiencies in the prior art, the present invention provides a flexible hydrophobic barrier medium plasma anti-icing device, which includes a bare electrode 1, a hydrophobic coating 4, a middle flexible insulating medium 3, a buried electrode 2, and a lower flexible insulating medium 5 from top to bottom;

The middle flexible insulating medium 3 is in the shape of a sheet;

The hydrophobic coating 4 is located on the middle flexible insulating medium 3, and the projection shape of the hydrophobic coating 4 on the horizontal plane is the same as that of the middle flexible insulating medium 3;

The flake-shaped exposed electrode 1 is arranged on the upper surface of the hydrophobic coating 4, and the projection of the exposed electrode 1 on the horizontal plane is a rectangle; the exposed electrode 1 is located on the left or right side of the upper surface of the hydrophobic coating 4, and the left and right edges of the exposed electrode 1 are parallel to the left and right edges of the hydrophobic coating 4, and each edge of the exposed electrode 1 is kept at a certain distance from the corresponding edge of the hydrophobic coating 4;

The buried electrode 2 is arranged on the lower surface of the middle layer flexible insulating medium 3, and the buried electrode 2 is generally located in the approximate middle of the lower surface of the middle layer flexible insulating medium 3, and the projection of the buried electrode 2 on the horizontal plane is rectangular; when the exposed electrode 1 is close to the left side of the middle layer flexible insulating medium 3, the projection of the left edge of the buried electrode 2 on the horizontal plane coincides with the projection of the right edge of the exposed electrode 1 on the horizontal plane, or keeps a small distance; The projections of the left edge of the exposed electrode 1 on the horizontal plane coincide, or keep a small distance; each edge of the buried electrode 2 and the corresponding edge of the middle flexible insulating medium 3 maintain a certain distance;

The lower layer of flexible insulating medium 5 is arranged at the bottom of the flexible hydrophobic barrier medium plasma anti-icing device, and its upper and lower sides are viscous. Normally, its projected shape on the horizontal plane is the same as that of the hydrophobic coating 4 and the middle layer of flexible insulating medium 3; the lower layer of flexible insulating medium 5 completely covers the buried electrode 2; the device is bonded to the position where the aircraft is easy to freeze through the lower layer of flexible insulating medium 5;

The exposed electrode 1 and the hydrophobic coating 4 , the hydrophobic coating 4 and the middle flexible insulating medium 3 , and the buried electrode 2 and the middle flexible insulating medium 3 are bonded by adhesive substances.

In one embodiment of the present invention, the middle flexible insulating medium 3 is a rectangular sheet with a thickness of 0.1-0.3 mm.

In another embodiment of the present invention, a distance of 1-2 mm is maintained between the buried electrode 2 and the projection of the exposed electrode 1 on the horizontal plane.

In a specific embodiment of the present invention,

The middle flexible insulating medium 3 is a rectangular sheet with a thickness of 0.2 mm; the lower flexible insulating medium 5 is selected from silicone rubber, epoxy resin, double-sided polyimide tape, double-sided polytetrafluoroethylene tape, preferably double-sided polyimide tape;

The exposed electrode 1 and the buried electrode 2 are prepared by bonding copper tape, or by ion beam sputtering and screen printing, copper, silver, platinum or gold are directly prepared on the lower surface of the middle flexible insulating medium 3 and the upper surface of the hydrophobic coating 4 .

There is also provided a flexible hydrophobic barrier medium plasma anti-icing device in the preparation process, plasma surface treatment equipment required for flexible insulating media, using the above-mentioned flexible hydrophobic barrier medium plasma anti-icing device, characterized in that the equipment includes a sine wave power supply 6, a switch 11, an upper electrode plate 7, a lower electrode plate 9, an upper insulating plate 8 and a lower insulating plate 10;

The upper electrode plate 7 is located on the upper surface of the upper insulating plate 8, is fixedly connected to the upper insulating plate 8, and is connected to the high-voltage end of the high-voltage power supply 6, and a switch 11 is inserted between the two to control the generation and cutting of the plasma;

The lower electrode plate 9 is located on the lower surface of the lower insulating plate 10, fixedly connected with the lower insulating plate 10, and the lower electrode plate 9 is grounded; the projections of the lower electrode plate 9 and the upper electrode plate 7 on the horizontal plane are basically coincident; the upper insulating plate 8 is opposite to the lower insulating plate 10 and placed parallel to each other, and the projections of the two on the horizontal plane are basically coincident. The vertical distance between the upper insulating plate 8 and the lower insulating plate 10 is 2-4mm;

The plasma anti-icing device of the flexible hydrophobic barrier medium is placed in the middle position above the lower insulating plate 10;

The negative end of the high voltage power supply 6 is grounded.

In one embodiment of the present invention, the upper insulating plate 8 and the lower insulating plate 10 are positioned opposite to each other and placed parallel to each other. The projections of the two on the horizontal plane basically overlap, and the vertical distance between the upper insulating plate 8 and the lower insulating plate 10 is 2-4mm.

In a specific embodiment of the present invention, the vertical distance between the upper insulating plate 8 and the lower insulating plate 10 is 3mm; the output voltage of the high voltage power supply 6 is 10-15kV, and the discharge frequency is 10-15kHz.

In addition, a method for preparing a flexible hydrophobic anti-icing plasma anti-icing device is provided, specifically as follows:

The first step, middle flexible insulating material 3 surface treatment

First, rinse the insulating material with alcohol; then, wash it in deionized water for 10min-20min, and dry it in an oven for 10min-20min; further, perform surface treatment on the middle flexible insulating material 3 by plasma;

Using plasma surface treatment equipment, place the above-mentioned treated middle layer flexible insulating medium 3 above the lower insulating plate 10, adjust the output voltage of the sine wave power supply 6 to 10-15kV, and discharge the frequency to 10-15kHz. After switching on the switch 11, plasma is generated between the gap between the upper insulating plate 8 and the lower insulating plate 10, and the plasma is surface-treated on the upper surface of the middle layer flexible insulating medium 3. The treatment time is 30-60s, and the surface-treated middle layer flexible insulating medium 3 is obtained;

The second step is to prepare a hydrophobic coating

Mix the SiC particles with the resin matrix, the mass fraction of SiC particles is between 30%-40%, stir magnetically at room temperature for 1h-2h, and then use an ultrasonic cell crusher to ultrasonically disperse at room temperature for 30min-60min; after fully mixing and uniform coating, the coating is evenly coated on the glass substrate.

The third step is to prepare the electrodes

Prepare electrodes on both sides of the flexible medium;

The fourth step is to pave the lower layer of flexible insulating medium 5

The covering range of the lower flexible insulating medium 5 is the same as that of the middle flexible insulating medium 3. One side is pasted on the back of the flexible medium to block the discharge on the back of the anti-icing device, and the other side is glued to the place where the aircraft body is prone to icing.

In a specific embodiment of the present invention, the preparation method of the above-mentioned flexible hydrophobic anti-icing plasma anti-icing device is as follows:

The first step, middle flexible insulating material 3 surface treatment

The insulating material is selected from polyimide, silicone rubber, polytetrafluoroethylene or polyethylene; wash in deionized water for 15 minutes, and dry in an ambient oven at 50°C for 15 minutes;

Using plasma surface treatment equipment, the above-mentioned treated middle layer flexible insulating medium 3 is placed above the lower insulating plate 10, the output voltage of the sine wave power supply 6 is adjusted to 12kV, and the discharge frequency is 13kHz. After the switch 11 is turned on, plasma is generated between the gap between the upper insulating plate 8 and the lower insulating plate 10, and the plasma is surface-treated on the upper surface of the middle layer flexible insulating medium 3. The treatment time is 45s, and the surface-treated middle layer flexible insulating medium 3 is obtained;

The second step is to prepare a hydrophobic coating

Mix the SiC particles with the resin matrix, the mass fraction of SiC particles is 35%, magnetically stir at 25°C at a speed of 300r/min for 1.5h, and then use an ultrasonic cell breaker with a power of 100W to ultrasonically disperse at 25°C for 45min; after fully mixing and uniform coating, the coating is evenly coated on the glass substrate, and the coating is naturally leveled to form a coating with a thickness of 0.05-0.3mm; put it in an oven at 100°C and cure for 2.5h; coating;

The third step is to prepare the electrodes

Directly use copper tape to paste on both sides of the flexible medium, or prepare by screen printing or ion beam sputtering process. The metal material used in the screen printing process is conductive silver paste, and the metal material used in the ion beam sputtering process is copper palladium, silver palladium, platinum palladium, gold palladium or tungsten palladium;

The fourth step is to pave the lower layer of flexible insulating medium 5

The covering range of the lower flexible insulating medium 5 is the same as that of the middle flexible insulating medium 3. One side is pasted on the back of the flexible medium to block the discharge on the back of the anti-icing device, and the other side is glued to the place where the aircraft body is prone to icing.

The present invention carries out plasma surface modification on the conventional flexible insulating medium, and then prepares a hydrophobic coating on the surface of the modified insulating medium, as the insulating barrier medium of the plasma anti-icing device, compared with the blocking medium without coating, its advantages are: under the same power excitation parameter conditions, the device can significantly reduce the discharge power consumption of the plasma anti-icing device; the plasma discharge is more uniform, the surface temperature distribution is also more uniform, and there will be no temperature distortion; the hydrophobic coating contains inorganic fillers, which can effectively block active particles generated by plasma discharge from bombarding and destroying the flexible insulating medium, thereby effectively prolonging the service life of the device; The hydrophobic surface can change the form of supercooled incoming ice accumulation and reduce the contact area with the surface of the plasma anti-icing device; the hydrophobic coating can effectively prevent ice accumulation on the surface of the aircraft body in combination with the rapid heating of the plasma discharge.

Description of drawings

Fig. 1 shows a schematic structural diagram of a flexible hydrophobic barrier medium plasma anti-icing device;

Figure 2 shows a schematic diagram of the preparation process of a flexible hydrophobic barrier medium plasma anti-icing device;

Fig. 3 shows the schematic diagram of insulating medium plasma surface treatment;

Fig. 4 shows the plasma region generated during the working process of the flexible hydrophobic barrier medium plasma anti-icing device;

Fig. 5 shows two waveforms output by the high-voltage power supply, wherein Fig. 5(a) shows a sinusoidal waveform, and Fig. 5(b) shows a sharp pulse waveform.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

Figure 1(a) and (b) show the front view and top view of the structure of the flexible hydrophobic barrier dielectric plasma anti-icing device, respectively. As shown in Fig. 1(a), the flexible hydrophobic barrier dielectric plasma anti-icing device includes a bare electrode 1, a hydrophobic coating 4, a middle flexible insulating medium 3, a buried electrode 2, and a lower flexible insulating medium 5 from top to bottom.

The middle flexible insulating medium 3 is generally a rectangular sheet with a thickness of 0.1-0.3mm, preferably 0.2mm.

A flake-shaped exposed electrode 1 is arranged on the upper surface of the hydrophobic coating 4 , and the projection of the exposed electrode 1 on the horizontal plane is generally rectangular. In a specific embodiment of the present invention, as shown in Figure 1 (a), the exposed electrode 1 is located on the left or right side of the hydrophobic coating 4, the left and right edges of the exposed electrode 1 are parallel to the left and right edges of the hydrophobic coating 4, and each edge of the exposed electrode 1 is kept at a certain distance from the corresponding edge of the hydrophobic coating 4.

The projection shape of the hydrophobic coating 4 on the horizontal plane is the same as that of the middle flexible insulating medium 3 . In a specific embodiment of the present invention, the hydrophobic coating 4 is prepared on the upper surface of the middle flexible insulating medium 3 by a spraying process, and the thickness of the coating is about 0.1 mm.

The buried electrode 2 is arranged on the lower surface of the middle layer flexible insulating medium 3, and the buried electrode 2 is generally located in the approximate middle of the lower surface of the middle layer flexible insulating medium 3. The projection of the buried electrode 2 on the horizontal plane is usually rectangular, and the projection of the left edge of the buried electrode 2 on the horizontal plane coincides with the projection of the exposed electrode 1 on the horizontal plane, and a distance of 1-2 mm can also be maintained.

The lower layer of flexible insulating medium 5 is arranged on the bottom layer of the plasma anti-icing device with flexible hydrophobic barrier medium. In addition to its insulating function, it also needs to have the function of stickiness on the upper and lower sides. The optional materials include silicone rubber, epoxy resin, double-sided polyimide tape, double-sided polytetrafluoroethylene tape, etc., preferably double-sided polyimide tape. Normally, its projected shape on the horizontal plane is the same as that of the hydrophobic coating 4 and the middle flexible insulating medium 3; the lower flexible insulating medium 5 must completely cover the buried electrode 2, and the lower flexible insulating medium 5 is used on the one hand to block the discharge on one side of the buried electrode 2, and on the other hand, it is used to bond the plasma anti-icing device of the flexible hydrophobic barrier medium of the present invention to the positions where aircraft such as wings and empennages are prone to icing.

In a specific embodiment of the present invention, the exposed electrode 1 and the hydrophobic coating 4 , the hydrophobic coating 4 and the middle flexible insulating medium 3 , and the buried electrode 2 and the middle flexible insulating medium 3 are all bonded by an adhesive layer. The exposed electrode 1 and the buried electrode 2 are not only prepared by bonding copper tape, but also copper, silver, platinum, gold and other metals can be directly prepared on the lower surface of the middle flexible insulating medium 3 and the upper surface of the hydrophobic coating 4 by ion beam sputtering and screen printing processes.

Figure 2 shows the preparation process of the flexible hydrophobic barrier dielectric plasma anti-icing device, which is divided into four steps, namely surface treatment of flexible insulating materials, preparation of hydrophobic coating, preparation of electrodes, and laying double-sided insulating tape. details as follows:

The first step, the surface treatment of the middle flexible insulating material

The flexible insulating material of the middle layer can be polyimide, silicone rubber, polytetrafluoroethylene, polyethylene, etc. First, rinse the flexible insulating material in the middle layer with alcohol; then, wash it in deionized water for 10 minutes to 20 minutes, preferably 15 minutes, and dry it in an oven at 50°C for 10 minutes to 20 minutes, preferably 15 minutes; further, in order to subsequently enhance the bonding force between the flexible insulating medium 3 in the middle layer and the hydrophobic coating 4, and avoid coating peeling off due to factors such as long-term discharge and complex environments, the surface of the flexible insulating material in the middle layer needs to be treated by plasma.

The plasma surface treatment device is shown in FIG. 3 . The device includes a sine wave power source 6 , a switch 11 , an upper electrode plate 7 , a lower electrode plate 9 , an upper insulating plate 8 and a lower insulating plate 10 . The upper electrode plate 7 is connected to the high-voltage end of the sine wave power supply 6, and a switch 11 is inserted between the two to control the generation and cut-off of the plasma. The negative end of the sine wave power supply 6 is grounded. The shape of the lower electrode plate 9 is the same as that of the upper electrode plate 7, and they are placed parallel to each other horizontally, and their projections on the horizontal plane completely overlap; the lower electrode plate 9 is grounded. The upper surface of the upper insulating plate 8 is in close contact with the lower surface of the upper electrode plate 7 , the upper electrode plate 7 is roughly located at the center of the upper insulating plate 8 , and the upper insulating plate 8 is placed horizontally. The lower surface of the lower insulating plate 10 is in close contact with the upper surface of the lower electrode plate 9, the lower electrode plate 9 is roughly located at the center of the lower insulating plate 10, the lower insulating plate 10 is placed horizontally, and the projections of the lower insulating plate 10 and the upper insulating plate 8 on the horizontal plane completely overlap. The vertical distance between the upper insulating plate 8 and the lower insulating plate 10 is 2-4 mm, preferably 3 mm. Put the aforementioned mid-layer flexible insulation medium 3 on the lower insulation board, adjust the sine wave power supply 6 output voltage is 10-15kV, preferably 12kV, the discharge frequency is 10-15kHz, preferably 13kHz, after connecting the switch 11, a plasma is generated between the upper insulation board 8 and the lower insulation board. Surface treatment, the processing time is 30-60s, preferably 45s, and obtain the surface processing mid-layer flexible insulation medium 3.

The second step is to prepare a hydrophobic coating 4

Mix the SiC particles with the resin matrix, the mass fraction of SiC particles is between 30%-40%, preferably 35%, magnetically stir at 25°C at a speed of 300r/min for 1h-2h, preferably 1.5h, and then use an ultrasonic cell breaker with a power of 100W to ultrasonically disperse at 25°C for 30min-60min, preferably 45min. After being fully mixed and uniform, dip the paint with a nylon brush, and evenly coat it on the surface of the middle flexible insulating medium 3, and wait for the paint to level off naturally to form a coating with a thickness of 0.05-0.3 mm, preferably 0.1 mm. Put it in an oven at 100°C, and cure for 2-3 hours, preferably 2.5 hours. The hydrophobic coating 4 can be prepared.

The third step is to prepare the electrodes

Copper tape can be directly selected as the exposed electrode 1 and the buried electrode 2, and the exposed electrode 1 is prepared on one side of the hydrophobic coating 4 (the other side of the hydrophobic coating 4 is bonded to the middle flexible insulating medium 3, and both have the same shape and covers each other), and the buried electrode 2 is prepared on one side of the middle flexible insulating medium 3 (as mentioned above, the other side of the middle flexible insulating medium 3 is bonded to the hydrophobic coating 4). In addition, the exposed electrode 1 and the buried electrode 2 can also be prepared by screen printing and ion beam sputtering. The metal material used in the screen printing process is conductive silver paste, and the metal materials that can be used in the ion beam sputtering process are copper palladium, silver palladium, platinum palladium, gold palladium, tungsten palladium, etc.

The fourth step is to pave the lower layer of flexible insulating medium 5

The lower flexible insulating medium 5 adopts double-sided insulating tape. The double-sided insulating tape covers the same size as the middle flexible insulating medium 3. One side is pasted on the back of the middle flexible insulating medium 3 to completely cover the buried electrode 2, which is used to block the discharge on the back of the anti-icing device, and the other side is bonded to the aircraft body.

In the present invention, the flexible hydrophobic anti-icing plasma anti-icing device, its anti-icing method is:

The exposed electrode 1 of the flexible hydrophobic anti-icing plasma anti-icing device is connected to the high-voltage end of the high-voltage power supply 13, and the negative end of the high-voltage power supply 13 is grounded. The buried electrode 2 is grounded (for example, a hole is drilled in the lower flexible insulating medium 5, and the buried electrode 2 is connected to the ground with a wire from outside and inside). The high-voltage power supply 13 can be the sine wave power supply 6 shown in FIG. 3 , or a pulse power supply (not shown). Its main function is to generate a strong electric field between the exposed electrode 1 and the buried electrode 2, and form a plasma discharge region 12 on the right side of the exposed electrode 1 and on the upper surface of the hydrophobic coating 4, as shown in FIG. 4 . The voltage waveform of the high-voltage power supply can be sinusoidal, pulsed, or other types. Figure 5(a) and (b) show the sinusoidal waveform and spike waveform output by the high-voltage power supply respectively.

The flexible hydrophobic anti-icing plasma anti-icing device of the present invention can not only reduce the power consumption of plasma discharge, but also has the following advantages:

Under the same power supply excitation parameters, the device can expand the plasma anti-icing area; the plasma discharge is more uniform, the surface temperature distribution is also more uniform, and there will be no temperature distortion; the hydrophobic coating contains inorganic fillers, which can effectively block the active particles generated by the plasma discharge from bombarding and destroying the flexible insulating medium, thereby effectively prolonging the service life of the device; the hydrophobic surface can change the form of supercooled ice accretion and reduce the contact area with the surface of the plasma anti-icing device;

Claims (9)

1. A flexible hydrophobic barrier medium plasma anti-icing device is characterized in that, the device comprises an exposed electrode (1), a hydrophobic coating (4), a middle flexible insulating medium (3), a buried electrode (2), and a lower flexible insulating medium (5) from top to bottom; The middle flexible insulating medium (3) is in the shape of a sheet; The hydrophobic coating (4) is located on the middle flexible insulating medium (3), and the projection shape of the hydrophobic coating (4) on the horizontal plane is the same as that of the middle flexible insulating medium (3); The flake-shaped exposed electrode (1) is arranged on the upper surface of the hydrophobic coating (4), and the projection of the exposed electrode (1) on the horizontal plane is a rectangle; the exposed electrode (1) is located on the left or right side of the upper surface of the hydrophobic coating (4), the left and right edges of the exposed electrode (1) are parallel to the left and right edges of the hydrophobic coating (4), and a certain distance is maintained between each edge of the exposed electrode (1) and the corresponding edge of the hydrophobic coating (4); The buried electrode (2) is arranged on the lower surface of the middle layer flexible insulating medium (3), and the buried electrode (2) is generally located in the middle of the lower surface of the middle layer flexible insulating medium (3), and the projection of the buried electrode (2) on the horizontal plane is rectangular; when the exposed electrode (1) is close to the left side of the middle layer flexible insulating medium (3), the projection of the left edge of the buried electrode (2) on the horizontal plane coincides with the projection of the right edge of the exposed electrode (1) on the horizontal plane, or a small distance is kept; when the exposed electrode (1) is close to the flexible insulating medium (3) On the right side, the projection of the right edge of the buried electrode (2) on the horizontal plane coincides with the projection of the left edge of the exposed electrode (1) on the horizontal plane, or keep a small distance; each edge of the buried electrode (2) maintains a certain distance from the corresponding edge of the middle flexible insulating medium (3); The lower layer of flexible insulating medium (5) is arranged at the bottom of the flexible hydrophobic barrier medium plasma anti-icing device, and its upper and lower sides are viscous. Under normal circumstances, its projected shape on the horizontal plane is the same as that of the hydrophobic coating (4) and the middle layer of flexible insulating medium (3); the lower layer of flexible insulating medium (5) completely covers the buried electrode (2); through the lower layer of flexible insulating medium (5), the device is bonded to the position where the aircraft is prone to icing; The exposed electrodes (1) and the hydrophobic coating (4), the hydrophobic coating (4) and the middle flexible insulating medium (3), and the buried electrodes (2) and the middle flexible insulating medium (3) are bonded by viscous substances. 2. The plasma anti-icing device with flexible hydrophobic barrier medium according to claim 1, characterized in that, the middle flexible insulating medium (3) is a rectangular sheet with a thickness of 0.1-0.3 mm. 3. The plasma anti-icing device of flexible hydrophobic barrier medium according to claim 1, characterized in that the buried electrode (2) and the projection of the exposed electrode (1) on the horizontal plane maintain a distance of 1-2mm. 4. flexible hydrophobic barrier medium plasma anti-icing device as claimed in claim 1, is characterized in that, The middle flexible insulating medium (3) is a rectangular sheet with a thickness of 0.2 mm; the lower flexible insulating medium (5) is selected from silicone rubber, epoxy resin, double-sided polyimide tape, and double-sided polytetrafluoroethylene tape; The exposed electrodes (1) and buried electrodes (2) are prepared by bonding copper tape, or by ion beam sputtering and screen printing processes, directly preparing copper, silver, platinum or gold on the lower surface of the middle flexible insulating medium (3) and the upper surface of the hydrophobic coating (4). 5. A flexible hydrophobic barrier medium plasma anti-icing device in the preparation process, the plasma surface treatment equipment that flexible insulating medium needs to use, adopts the flexible hydrophobic barrier medium plasma anti-icing device as described in any one of claims 1 to 4, it is characterized in that the equipment includes a sine wave power supply (6), a switch (11), an upper electrode plate (7), a lower electrode plate (9), an upper insulating plate (8) and a lower insulating plate (10); wherein The upper electrode plate (7) is located on the upper surface of the upper insulating plate (8), fixedly connected to the upper insulating plate (8), connected to the high-voltage end of the sine wave power supply (6), and a switch (11) is inserted between the two to control the generation and cut-off of plasma; The lower electrode plate (9) is located on the lower surface of the lower insulating plate (10), fixedly connected with the lower insulating plate (10), and the lower electrode plate (9) is grounded; the projections of the lower electrode plate (9) and the upper electrode plate (7) on the horizontal plane basically overlap; the upper insulating plate (8) is opposite to the lower insulating plate (10), and are placed parallel to each other. placing the flexible hydrophobic barrier medium plasma anti-icing device in the middle above the lower insulating plate (10); The negative end of the sine wave power supply (6) is grounded. 6. plasma surface treatment equipment as claimed in claim 5, is characterized in that, upper insulating plate (8) and lower insulating plate (10) position are relative, are placed parallel to each other, the projection of the two on the horizontal plane coincides substantially, and the vertical distance between upper insulating plate (8) and lower insulating plate (10) is 2-4mm. 7. plasma surface treatment equipment as claimed in claim 6, is characterized in that, the vertical spacing between upper insulating plate (8) and lower insulating plate (10) is 3mm; Sine wave power supply (6) output voltage is 10-15kV, discharge frequency 10-15kHz. 8. A method for preparing a flexible hydrophobic anti-icing plasma anti-icing device, characterized in that, the details are as follows: The first step, middle layer flexible insulating medium (3) surface treatment First, rinse the middle layer flexible insulating medium (3) with alcohol; then, wash it in deionized water for 10min-20min, and dry it in an oven for 10min-20min; further, perform surface treatment on the middle layer flexible insulating medium (3) by plasma; Using plasma surface treatment equipment, place the above-mentioned treated middle layer flexible insulating medium (3) above the lower insulating plate (10), adjust the output voltage of the sine wave power supply (6) to 10-15kV, and the discharge frequency to 10-15kHz. After the switch (11) is turned on, plasma is generated between the upper insulating plate (8) and the lower insulating plate (10), and the plasma is surface treated on the upper surface of the middle layer flexible insulating medium (3). insulating medium (3); The second step is to prepare a hydrophobic coating Mix the SiC particles with the resin matrix, the mass fraction of SiC particles is between 30%-40%, stir magnetically at room temperature for 1h-2h, and then use an ultrasonic cell crusher to ultrasonically disperse at room temperature for 30min-60min; after fully mixing and uniform coating, the coating is evenly coated on the glass substrate. The third step is to prepare the electrodes Prepare electrodes on both sides of the flexible medium; The fourth step is to pave the lower layer of flexible insulating medium (5) The covering range of the lower flexible insulating medium (5) is the same as that of the middle flexible insulating medium (3). One side is pasted on the back of the flexible medium to block the discharge on the back of the anti-icing device, and the other side is glued to the place where the aircraft body is prone to icing. 9. The method for preparing a flexible hydrophobic anti-icing plasma anti-icing device according to claim 8, characterized in that, it is as follows: The first step, middle flexible insulating material 3 surface treatment The insulating material is selected from polyimide, silicone rubber, polytetrafluoroethylene or polyethylene; wash in deionized water for 15 minutes, and dry in an ambient oven at 50°C for 15 minutes; Using plasma surface treatment equipment, placing the above-mentioned treated middle layer flexible insulating medium (3) above the lower insulating plate (10), adjusting the output voltage of the sine wave power supply (6) to 12kV, and the discharge frequency to 13kHz, after switching on the switch (11), plasma is generated between the upper insulating plate (8) and the lower insulating plate (10), and the plasma is surface-treated on the upper surface of the middle layer flexible insulating medium (3), and the treatment time is 45s, and the surface-treated middle layer flexible insulating medium (3) is obtained; The second step is to prepare a hydrophobic coating Mix the SiC particles with the resin matrix, the mass fraction of SiC particles is 35%, magnetically stir at 25°C at a speed of 300r/min for 1.5h, and then use an ultrasonic cell breaker with a power of 100W to ultrasonically disperse at 25°C for 45min; after fully mixing and uniform coating, the coating is evenly coated on the glass substrate, and the coating is naturally leveled to form a coating with a thickness of 0.05-0.3mm; put it in an oven at 100°C and cure for 2.5h; coating; The third step is to prepare the electrodes Directly use copper tape to paste on both sides of the flexible medium, or prepare by screen printing or ion beam sputtering process. The metal material used in the screen printing process is conductive silver paste, and the metal material used in the ion beam sputtering process is copper palladium, silver palladium, platinum palladium, gold palladium or tungsten palladium; The fourth step is to pave the lower layer of flexible insulating medium (5) The covering range of the lower flexible insulating medium (5) is the same as that of the middle flexible insulating medium (3). One side is pasted on the back of the flexible medium to block the discharge on the back of the anti-icing device, and the other side is glued to the place where the aircraft body is prone to icing.