Pneumatic device and method for brushing heat-conducting silicone grease on ceramic chip of radiator

Abstract

The invention provides a pneumatic device and method for brushing heat-conducting silicone grease on a radiator ceramic wafer. The pneumatic device comprises a relay positioning frame and a sucker device; the surface of the radiator is provided with a plurality of first ceramic chip positioning grooves for arranging ceramic chips; the relay positioning frame is also provided with a plurality of through positioning ports. The suction cup device comprises a ceramic wafer placing seat, a suction cup mounting seat, a cover plate and an air control mechanism, a plurality of second ceramic wafer positioning grooves for placing ceramic wafers are formed in the bottom surface of the ceramic wafer placing seat, a plurality of suction cup mounting columns extending downwards are arranged on the lower surface of the suction cup mounting seat, and vacuum suction cups are mounted below the suction cup mounting columns. According to the invention, the sucker device is used for sucking the ceramic wafer and overturning and placing the ceramic wafer on the radiator, the radiator does not need to be moved, and for a larger radiator, gluing and loading of the ceramic wafer can be carried out for multiple times through the sucker device with smaller weight, or a plurality of different sucker devices with smaller weight are configured, so that the brushing operation of heat-conducting silicone grease is facilitated, and the working efficiency is improved. And the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of inverter manufacturing, in particular to a pneumatic device and method for applying thermal conductive silicone grease to a radiator ceramic sheet. Background Art

[0002] There are usually multiple power components on the inverter. These power components generate a lot of heat and need to be dissipated in time through the heat sink. The ceramic sheet is a heat transfer intermediate between the power components and the heat sink. In order to improve the contact and bonding between the surface of the ceramic sheet and the power components and the heat sink, thermal conductive silicone grease needs to be applied on both surfaces of the ceramic sheet.

[0003] The existing method of applying thermal grease to ceramic sheets is inefficient and has great limitations. Currently, the ceramic sheets are placed on a jig, glue is applied on one side of the ceramic sheets, and then the heat sink is placed on the jig. The jig and the heat sink are then turned 180 degrees together, the ceramic sheets are transferred to the heat sink, and the jig is removed and glue is applied on the other side of the ceramic sheets on the heat sink. Because it requires multiple handling and turning, and when the heat sink is large and heavy, the whole process is time-consuming and labor-intensive, with high labor costs and high labor intensity. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a pneumatic device and method for applying thermal grease to a radiator ceramic plate.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problem is: a pneumatic device for applying thermal conductive silicone grease to a radiator ceramic sheet, comprising:

[0006] A heat sink, the surface of which has a plurality of first ceramic sheet positioning grooves for arranging ceramic sheets;

[0007] A relay positioning frame having a contour positioning structure for matching and positioning with the surface contour of the heat sink, the relay positioning frame is also provided with a plurality of through positioning openings, each of the through positioning openings being surrounded by a plurality of first ceramic sheet positioning grooves;

[0008] The suction cup device comprises a ceramic sheet placement seat, a suction cup mounting seat, a cover plate and an air control mechanism, wherein a positioning structure matching the through positioning port is provided at the bottom of the ceramic sheet placement seat, a plurality of second ceramic sheet positioning grooves for placing ceramic sheets are provided on the bottom surface of the ceramic sheet placement seat, the second ceramic sheet positioning grooves are arranged vertically opposite to the first ceramic sheet positioning grooves on the radiator, and a suction cup through hole penetrating vertically is provided in the middle of the second ceramic sheet positioning grooves; the suction cup mounting seat is installed above the ceramic sheet placement seat, a plurality of suction cup mounting columns extending downward are provided on the lower surface of the suction cup mounting seat, a gas sub-channel penetrating vertically is provided at the center of the suction cup mounting column, and a vacuum suction cup is installed below the suction cup mounting column; the cover plate is arranged above the suction cup mounting seat, and a gas main channel connected to all the gas sub-channels is provided between the cover plate and the suction cup mounting seat; the air control mechanism is connected to the gas main channel, and the air control mechanism is used to control the extraction of vacuum or the blowing of gas into the gas main channel.

[0009] The present invention uses a suction cup device to suck up the ceramic sheet and flip it over to place it on the radiator without moving the radiator. For a larger radiator, the ceramic sheet can be coated and loaded multiple times by a suction cup device of smaller weight, or a plurality of different suction cup devices of smaller weight can be configured, which facilitates the application of thermal grease and reduces labor intensity.

[0010] Furthermore, the air control mechanism includes an air pump, an air inlet switch, a reversing valve and a vacuum generator, the reversing valve having an air inlet, a first air outlet and a second air outlet, the reversing valve being used to control whether the air inlet is separately connected to the first air outlet or whether the air inlet is separately connected to the second air outlet; the air outlet of the air pump is connected to the air inlet of the air inlet switch via a pipeline, the air outlet of the air inlet switch is connected to the air inlet of the reversing valve via a pipeline, the first air outlet of the reversing valve is connected to the main gas channel of the suction cup device via a first branch pipeline, the second air outlet of the reversing valve is connected to the air inlet end of the vacuum generator via a second branch pipeline, the air outlet end of the vacuum generator is emptied to the atmosphere, and the vacuum end of the vacuum generator is connected to the main gas channel of the suction cup device.

[0011] By adopting the above preferred solution, the ceramic sheet can be sucked and blown only by manipulating the reversing valve, thereby increasing the speed at which the ceramic sheet is detached from the suction cup device to the radiator and improving the operating efficiency.

[0012] Furthermore, a sealing ring is provided between the vacuum suction cup and the suction cup mounting column; and a sealing gasket surrounding the outer edge of the opening of the gas main channel is provided between the cover plate and the suction cup mounting seat.

[0013] The above preferred solution is adopted to improve the sealing performance.

[0014] Furthermore, it also includes a ceramic sheet arrangement mechanism, which includes a linear shifting mechanism and a ceramic sheet arrangement box, and the linear shifting mechanism is installed on the ceramic sheet placement seat of the suction cup device, and a quick positioning structure is provided between the ceramic sheet arrangement box and the slider of the linear shifting mechanism, and a stacking cavity for stacking ceramic sheets is provided in the ceramic sheet arrangement box, and a lower opening for ceramic sheets to fall into is provided at the bottom of the stacking cavity, and under the drive of the linear shifting mechanism, the lower opening of the stacking cavity of the ceramic sheet arrangement box is relatively matched with each second ceramic sheet positioning groove arranged in a row on the ceramic sheet placement seat in sequence.

[0015] By adopting the above preferred solution, the speed of discharging ceramic sheets on the suction cup device is increased, thereby improving the working efficiency.

[0016] Furthermore, the linear shifting mechanism includes a rodless cylinder, a slice expelling switch and a slice expelling reversing valve, the air inlet end of the slice expelling switch is connected to the air outlet of the air pump via a pipeline, the air outlet end of the slice expelling switch is connected to the air inlet end of the slice expelling reversing valve via a pipeline, the first air outlet end of the slice expelling reversing valve is connected to one air port of the rodless cylinder, and the second air outlet end of the slice expelling reversing valve is connected to the other air port of the rodless cylinder.

[0017] Furthermore, speed regulating valves are installed at the two air ports of the rodless cylinder.

[0018] The adoption of the above preferred solution helps to make the suction cup device lighter through the pneumatic linear displacement mechanism of the rodless cylinder.

[0019] Furthermore, the rapid positioning structure includes a positioning iron plate fixedly mounted on the slider of the linear displacement mechanism and a magnet and a positioning pin fixedly mounted on the lower surface of the ceramic sheet arrangement box, and the positioning iron plate is provided with a positioning hole matching the positioning pin.

[0020] The above preferred solution is adopted to facilitate the quick docking of the ceramic sheet arrangement box and the suction cup device, thereby improving the working efficiency.

[0021] Furthermore, the thickness of the ceramic sheet is d, the depth of the second ceramic sheet positioning groove of the ceramic sheet placement seat is a, and the distance between the bottom surface of the stacking cavity of the ceramic sheet arrangement box and the upper surface of the ceramic sheet placement seat is b, then, <a<d,d-a<b<2d-a。

[0022] Furthermore, outward-expanding chamfered surfaces are provided on both sides of the lower opening of the stacking cavity that are perpendicular to the moving direction of the ceramic sheet arrangement box, and the angle between the chamfered surface and the horizontal plane is 40-60°. The distance between the chamfered surfaces in the height direction is c, then c=2d-a-b+0.2mm.

[0023] The adoption of the above preferred solution helps the front end of the bottom ceramic sheet in the forward direction to first obliquely enter the second ceramic sheet positioning groove, thereby improving the smoothness and reliability of the ceramic sheet placement.

[0024] The method for applying thermal conductive silicone grease to a radiator ceramic sheet comprises the following steps:

[0025] Step 1, dividing the first ceramic sheet positioning groove of the heat sink into multiple areas, making a relay positioning frame, designing through positioning openings matching the multiple areas on the relay positioning frame, making a suction cup device matching the through positioning openings, and the position of the second ceramic sheet positioning groove on the suction cup device matches the first ceramic sheet positioning groove in the through positioning opening;

[0026] Step 2, place the relay positioning frame on the radiator and align it;

[0027] Step 3, placing a ceramic sheet in the second ceramic sheet positioning groove of the ceramic sheet placement seat of the suction cup device, evacuating the gas main channel through the gas control mechanism, the vacuum suction cup adsorbs and presses the ceramic sheet against the second ceramic sheet positioning groove, and applying thermal conductive silicone grease to the exposed first surface of the ceramic sheet;

[0028] Step 4, flip the suction cup device 180 degrees and place it in the through positioning opening of the relay positioning frame;

[0029] Step 5, blowing air into the main gas channel through the air control mechanism, the airflow in the vacuum suction cup blows the ceramic piece into the first ceramic piece positioning groove on the heat sink, and the suction cup device is removed;

[0030] Step 6: Apply thermal grease to the second exposed surface of the ceramic sheet on the heat sink.

[0031] Further, in step 3, a ceramic sheet is placed in the second ceramic sheet positioning groove of the ceramic sheet placement seat of the suction cup device, specifically including: stacking the ceramic sheets in the stacking cavity of the ceramic sheet arrangement box, positioning and installing the ceramic sheet arrangement box and the slider of the linear shift mechanism, starting the linear shift mechanism, and the ceramic sheets enter the respective second ceramic sheet positioning grooves of the suction cup device in turn. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a structural schematic diagram of an implementation mode of the pneumatic device of the present invention.

[0034] Figure 2 It is a cross-sectional view of an embodiment of the pneumatic device of the present invention.

[0035] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0036] Figure 4 It is a structural diagram of the relay positioning frame and the radiator.

[0037] Figure 5 It is a top view of one embodiment of the suction cup device.

[0038] Figure 6 It is a structural schematic diagram of an implementation method of an air control mechanism.

[0039] Figure 7 It is a schematic diagram with the ceramic plate placement seat facing upward.

[0040] Figure 8 It is a schematic diagram of the combination state of the ceramic sheet discharging mechanism and the suction cup device.

[0041] Fig. 9 It is a cross-sectional view of the ceramic sheet discharging mechanism and the suction cup device in a combined state and perpendicular to the moving direction.

[0042] Fig.10 It is a cross-sectional view of the ceramic sheet discharging mechanism and the suction cup device in a combined state vertically parallel to the moving direction.

[0043] Fig.11 yes Fig.10 A partial enlarged view of point B in the middle.

[0044] Fig.12 yes Fig.11 A partial enlarged view of point C in the middle.

[0045] The numbers and letters in the figure represent the names of the corresponding parts:

[0046] 10-heat sink; 11-first ceramic sheet positioning groove;

[0047] 20-relay positioning frame; 21-through positioning port;

[0048] 30-suction cup device; 31-ceramic plate placement seat; 311-second ceramic plate positioning groove; 312-suction cup through hole; 32-suction cup mounting seat; 321-suction cup mounting column; 322-gas sub-channel; 323-vacuum suction cup; 324-gas main channel; 33-cover plate; 34-gas control mechanism; 341-air inlet switch; 342-reversing valve; 3421-air inlet; 3422-first air outlet; 3423-second air outlet; 3424-first branch pipeline; 3425-second branch pipeline; 343-vacuum generator; 3431-air inlet end; 3432-air outlet end; 3433-vacuum end; 351-sealing ring; 352-sealing pad;

[0049] 40-ceramic sheet discharging mechanism; 41-linear displacement mechanism; 411-rodless cylinder; 4111-slider; 4112-positioning iron plate; 412-sheet discharging switch; 413-sheet discharging reversing valve; 414-speed regulating valve; 42-ceramic sheet discharging box; 421-sheet stacking cavity; 422-magnet; 423-positioning pin; 424-chamfered surface;

[0050] 50-Ceramic pieces. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] like Figure 1-12 As shown, a pneumatic device for applying thermal grease to a radiator ceramic sheet comprises:

[0053] The heat sink 10 has a plurality of first ceramic sheet positioning grooves 11 on its surface for arranging ceramic sheets;

[0054] The relay positioning frame 20 has a contour positioning structure that matches and positions the contour of the heat sink surface. The relay positioning frame 20 is also provided with a plurality of through positioning openings 21, each of which surrounds a plurality of first ceramic sheet positioning grooves 11;

[0055] The suction cup device 30 includes a ceramic sheet placement seat 31, a suction cup mounting seat 32, a cover plate 33 and an air control mechanism 34. The bottom of the ceramic sheet placement seat 31 is provided with a positioning structure matching the through positioning opening 21. The bottom surface of the ceramic sheet placement seat 31 is provided with a plurality of second ceramic sheet positioning grooves 311 for placing ceramic sheets. The second ceramic sheet positioning grooves 311 are arranged vertically opposite to the first ceramic sheet positioning grooves 11 on the radiator. A suction cup through hole 312 is provided in the middle of the second ceramic sheet positioning grooves 311. The suction cup mounting seat 32 is installed on the ceramic sheet placement seat 31. At the top, the lower surface of the suction cup mounting seat 32 is provided with a plurality of suction cup mounting columns 321 extending downward, and a gas sub-channel 322 penetrating from top to bottom is provided at the center of the suction cup mounting column 321, and a vacuum suction cup 323 is installed below the suction cup mounting column 321; a cover plate 33 is provided on the top of the suction cup mounting seat 32, and a main gas channel 324 connected to all gas sub-channels 322 is provided between the cover plate 33 and the suction cup mounting seat 32; a gas control mechanism 34 is connected to the main gas channel 324, and the gas control mechanism 34 is used to control the extraction of vacuum or the blowing of gas into the main gas channel 324.

[0056] The beneficial effect of adopting the above technical solution is: the ceramic sheet is sucked up by the suction cup device and turned over and placed on the radiator without moving the radiator. For a larger radiator, the ceramic sheet can be coated and loaded in multiple times by a suction cup device of smaller weight, or multiple different suction cup devices of smaller weight can be configured, which facilitates the application of thermal grease and reduces labor intensity.

[0057] like Figure 6 As shown, in some other embodiments of the present invention, the air control mechanism 34 includes an air pump (not shown in the figure), an air inlet switch 341, a reversing valve 342 and a vacuum generator 343, the reversing valve 342 has an air inlet 3421, a first air outlet 3422 and a second air outlet 3423, the reversing valve 342 is used to control its air inlet 3421 to be connected to its first air outlet 3422 alone or its air inlet 3421 to be connected to the second air outlet 3423 alone; the air outlet of the air pump is connected to the air inlet switch 341 through a pipeline. The air inlet of the air inlet switch 341 is connected to the air inlet of the reversing valve 342 through a pipeline, the first air outlet 3422 of the reversing valve 342 is connected to the main gas channel 324 of the suction cup device through the first branch pipeline 3424, the second air outlet 3423 of the reversing valve is connected to the air inlet end of the vacuum generator 343 through the second branch pipeline 3425, the air outlet end 3432 of the vacuum generator 343 is empty to the atmosphere, and the vacuum end 3433 of the vacuum generator is connected to the main gas channel 324 of the suction cup device. The beneficial effect of adopting the above technical solution is that the ceramic sheet can be sucked and blown only by controlling the reversing valve, the separation speed of the ceramic sheet from the suction cup device to the radiator is increased, and the working efficiency is improved.

[0058] like Figure 3 As shown, in some other embodiments of the present invention, a sealing ring 351 is provided between the vacuum suction cup 323 and the suction cup mounting column 321; a sealing pad 352 is provided between the cover plate 33 and the suction cup mounting seat 32 to surround the outer edge of the opening of the gas main channel 324. The beneficial effect of adopting the above technical solution is: improving the sealing performance.

[0059] like Figure 8-12 As shown, in some other embodiments of the present invention, a ceramic sheet arrangement mechanism 40 is also included, and the ceramic sheet arrangement mechanism 40 includes a linear displacement mechanism 41 and a ceramic sheet arrangement box 42. The linear displacement mechanism 41 is installed on the ceramic sheet placement seat 31 of the suction cup device. A quick positioning structure is provided between the ceramic sheet arrangement box 42 and the slider of the linear displacement mechanism 41. A stacking cavity 421 for stacking ceramic sheets 50 is provided in the ceramic sheet arrangement box 42. The bottom of the stacking cavity 421 is provided with a lower opening for the ceramic sheet 50 to fall. Under the drive of the linear displacement mechanism 41, the lower opening of the stacking cavity 421 of the ceramic sheet arrangement box 42 is sequentially matched with each second ceramic sheet positioning groove 311 arranged in a row on the ceramic sheet placement seat 31. The beneficial effects of adopting the above technical solution are: improving the speed of arranging ceramic sheets on the suction cup device and improving the working efficiency.

[0060] like Figure 8-12 As shown, in some other embodiments of the present invention, the linear displacement mechanism 41 includes a rodless cylinder 411, a sheet discharge switch 412 and a sheet discharge reversing valve 413, the air inlet end of the sheet discharge switch 412 is connected to the air outlet of the air pump via a pipeline, the air outlet end of the sheet discharge switch 412 is connected to the air inlet end of the sheet discharge reversing valve 413 via a pipeline, the first air outlet end of the sheet discharge reversing valve 413 is connected to one air port of the rodless cylinder 411, and the second air outlet end of the sheet discharge reversing valve 413 is connected to another air port of the rodless cylinder 411. A speed regulating valve 414 is also installed at the two air ports of the rodless cylinder 411. The beneficial effect of adopting the above technical solution is that the pneumatic linear displacement mechanism of the rodless cylinder helps to make the suction cup device lighter.

[0061] like Fig. 9 As shown, in some other embodiments of the present invention, the quick positioning structure includes a positioning iron plate 4112 fixedly mounted on the slider of the linear displacement mechanism 41, and a magnet 422 and a positioning pin 423 fixedly mounted on the lower surface of the ceramic sheet arrangement box 42, and a positioning hole matching the positioning pin 423 is provided on the positioning iron plate 4112. The beneficial effect of adopting the above technical solution is to facilitate the quick docking of the ceramic sheet arrangement box and the suction cup device, thereby improving the working efficiency.

[0062] like Fig.12As shown in the figure, in some other embodiments of the present invention, taking the thickness of the ceramic sheet 50 as d, the groove depth of the second ceramic sheet positioning groove 311 of the ceramic sheet placement seat as a, and the distance between the bottom surface of the stacking cavity of the ceramic sheet stacking box 42 and the upper surface of the ceramic sheet placement seat 31 as b, then 0 < a < d, d - a < b < 2d - a. Chamfered surfaces 424 that expand outward are provided on both sides perpendicular to the moving direction of the ceramic sheet stacking box at the lower opening of the stacking cavity 421. The angle between the chamfered surface 424 and the horizontal plane is 40 - 60°, and the distance of the chamfered surface 424 in the height direction is c, then c = 2d - a - b + 0.2 mm. The beneficial effect of adopting the above technical solution is that it helps the bottom ceramic sheet to obliquely enter the second ceramic sheet positioning groove first at the front end in the advancing direction, improving the smoothness and reliability of ceramic sheet placement.

[0063] Method for applying thermal conductive silicone grease to the ceramic sheet of the radiator, comprising the following steps:

[0064] Step 1: Divide the first ceramic sheet positioning groove of the radiator into multiple regions, fabricate a relay positioning frame, design through positioning ports on the relay positioning frame that match the multiple regions, fabricate a suction cup device that matches the through positioning ports, and the position of the second ceramic sheet positioning groove on the suction cup device matches the first ceramic sheet positioning groove in the through positioning port;

[0065] Step 2: Place the relay positioning frame on the radiator and align it for positioning;

[0066] Step 3: Place a ceramic sheet in the second ceramic sheet positioning groove of the ceramic sheet placement seat of the suction cup device, evacuate the gas total passage through the air control mechanism, and the vacuum suction cup adsorbs and presses the ceramic sheet against the second ceramic sheet positioning groove, and apply thermal conductive silicone grease to the first exposed surface of the ceramic sheet;

[0067] Step 4: Flip the suction cup device by 180 degrees and place it in the through positioning port of the relay positioning frame;

[0068] Step 5: Blow air into the gas total passage through the air control mechanism, and the airflow in the vacuum suction cup blows the ceramic sheet into the first ceramic sheet positioning groove on the radiator, and remove the suction cup device;

[0069] Step 6: Apply thermal conductive silicone grease to the second exposed surface of the ceramic sheet on the radiator.

[0070] Further, in Step 3, placing a ceramic sheet in the second ceramic sheet positioning groove of the ceramic sheet placement seat of the suction cup device specifically includes: stacking ceramic sheets in the stacking cavity of the ceramic sheet stacking box, positioning and installing the ceramic sheet stacking box with the slider of the linear displacement mechanism, starting the linear displacement mechanism, and the ceramic sheets sequentially enter each second ceramic sheet positioning groove of the suction cup device.

[0071] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. The pneumatic device for applying thermal grease to the ceramic plate of the radiator is characterized by: include: A heat sink, the surface of which has a plurality of first ceramic sheet positioning grooves for arranging ceramic sheets; A relay positioning frame having a contour positioning structure for matching and positioning with the surface contour of the heat sink, the relay positioning frame is also provided with a plurality of through positioning openings, each of the through positioning openings being surrounded by a plurality of first ceramic sheet positioning grooves; The suction cup device comprises a ceramic sheet placement seat, a suction cup mounting seat, a cover plate and an air control mechanism, wherein a positioning structure matching the through positioning port is provided at the bottom of the ceramic sheet placement seat, a plurality of second ceramic sheet positioning grooves for placing ceramic sheets are provided on the bottom surface of the ceramic sheet placement seat, the second ceramic sheet positioning grooves are arranged vertically opposite to the first ceramic sheet positioning grooves on the radiator, and a suction cup through hole penetrating vertically is provided in the middle of the second ceramic sheet positioning grooves; the suction cup mounting seat is installed above the ceramic sheet placement seat, a plurality of suction cup mounting columns extending downward are provided on the lower surface of the suction cup mounting seat, a gas sub-channel penetrating vertically is provided at the center of the suction cup mounting column, and a vacuum suction cup is installed below the suction cup mounting column; the cover plate is arranged above the suction cup mounting seat, and a gas main channel connected to all the gas sub-channels is provided between the cover plate and the suction cup mounting seat; the air control mechanism is connected to the gas main channel, and the air control mechanism is used to control the extraction of vacuum or the blowing of gas into the gas main channel.

2. The pneumatic device for applying thermal grease to the ceramic plate of the radiator according to claim 1 is characterized in that: The air control mechanism includes an air pump, an air inlet switch, a reversing valve and a vacuum generator. The reversing valve has an air inlet, a first air outlet and a second air outlet. The reversing valve is used to control the air inlet to be separately connected to the first air outlet or the air inlet to be separately connected to the second air outlet. The air outlet of the air pump is connected to the air inlet of the air inlet switch via a pipeline, and the air outlet of the air inlet switch is connected to the air inlet of the reversing valve via a pipeline. The first air outlet of the reversing valve is connected to the main gas channel of the suction cup device via a first branch pipeline, and the second air outlet of the reversing valve is connected to the air inlet end of the vacuum generator via a second branch pipeline. The air outlet end of the vacuum generator is emptied to the atmosphere, and the vacuum end of the vacuum generator is connected to the main gas channel of the suction cup device.

3. The pneumatic device for applying thermal grease to a radiator ceramic sheet according to claim 1, characterized in that: A sealing ring is provided between the vacuum suction cup and the suction cup mounting column; a sealing gasket surrounding the outer edge of the opening of the gas main channel is provided between the cover plate and the suction cup mounting seat.

4. The pneumatic device for applying thermal grease to a radiator ceramic sheet according to claim 1, characterized in that: It also includes a ceramic sheet arrangement mechanism, which includes a linear shifting mechanism and a ceramic sheet arrangement box. The linear shifting mechanism is installed on the ceramic sheet placement seat of the suction cup device. A quick positioning structure is provided between the ceramic sheet arrangement box and the slider of the linear shifting mechanism. A stacking cavity for stacking ceramic sheets is provided in the ceramic sheet arrangement box. A lower opening for ceramic sheets to fall into is provided at the bottom of the stacking cavity. Driven by the linear shifting mechanism, the lower opening of the stacking cavity of the ceramic sheet arrangement box is relatively matched with each second ceramic sheet positioning groove arranged in a row on the ceramic sheet placement seat.

5. The pneumatic device for applying thermal grease to the ceramic plate of the radiator according to claim 4 is characterized in that: The linear shifting mechanism includes a rodless cylinder, a slice discharge switch and a slice discharge reversing valve. The air inlet end of the slice discharge switch is connected to the air outlet of the air pump via a pipeline, the air outlet end of the slice discharge switch is connected to the air inlet end of the slice discharge reversing valve via a pipeline, the first air outlet end of the slice discharge reversing valve is connected to one air port of the rodless cylinder, and the second air outlet end of the slice discharge reversing valve is connected to the other air port of the rodless cylinder.

6. The pneumatic device for applying thermal grease to the ceramic plate of the radiator according to claim 5, characterized in that: Speed ​​regulating valves are also installed at the two gas ports of the rodless cylinder.

7. The pneumatic device for applying thermal grease to a radiator ceramic sheet according to claim 4, characterized in that: The rapid positioning structure includes a positioning iron plate fixedly mounted on the slider of the linear displacement mechanism and a magnet and a positioning pin fixedly mounted on the lower surface of the ceramic sheet arrangement box. The positioning iron plate is provided with a positioning hole matching the positioning pin.

8. The pneumatic device for applying thermal grease to a radiator ceramic sheet according to claim 4, characterized in that: Assuming the thickness of the ceramic sheet is d, the depth of the second ceramic sheet positioning groove of the ceramic sheet placement seat is a, and the distance between the bottom surface of the stacking cavity of the ceramic sheet arrangement box and the upper surface of the ceramic sheet placement seat is b, then, <a<d,d-a<b<2d-a。 9. The pneumatic device for applying thermal grease to a radiator ceramic sheet according to claim 8, characterized in that: Outwardly expanding chamfered surfaces are provided on both sides of the lower opening of the stacking cavity that are perpendicular to the moving direction of the ceramic sheet arrangement box. The angle between the chamfered surface and the horizontal plane is 40-60°. The distance between the chamfered surfaces in the height direction is c, then c=2d-a-b+0.2mm.

10. A method for applying thermal grease to a radiator ceramic sheet, characterized in that: The pneumatic device for applying thermal grease to a radiator ceramic sheet as claimed in any one of claims 1 to 9 comprises the following steps: Step 1, dividing the first ceramic sheet positioning groove of the heat sink into multiple areas, making a relay positioning frame, designing through positioning openings matching the multiple areas on the relay positioning frame, making a suction cup device matching the through positioning openings, and the position of the second ceramic sheet positioning groove on the suction cup device matches the first ceramic sheet positioning groove in the through positioning opening; Step 2, place the relay positioning frame on the radiator and align it; Step 3, placing a ceramic sheet in the second ceramic sheet positioning groove of the ceramic sheet placement seat of the suction cup device, evacuating the gas main channel through the gas control mechanism, the vacuum suction cup adsorbs and presses the ceramic sheet against the second ceramic sheet positioning groove, and applying thermal conductive silicone grease to the exposed first surface of the ceramic sheet; Step 4, flip the suction cup device 180 degrees and place it in the through positioning opening of the relay positioning frame; Step 5, blowing air into the main gas channel through the air control mechanism, the airflow in the vacuum suction cup blows the ceramic piece into the first ceramic piece positioning groove on the heat sink, and the suction cup device is removed; Step 6: Apply thermal grease to the second exposed surface of the ceramic sheet on the heat sink.

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