Ink-jet printing head applied to patterning of building integrated photovoltaic panel

Abstract

The utility model discloses an ink-jet printing head applied to patterning of a building integrated photovoltaic panel, which comprises a plurality of ink-jet heads arranged in a matrix, and each ink-jet head comprises an ink-jet head seat, four piezoelectric nozzles fixed on the ink-jet head seat and an electrostatic adsorption device, the electrostatic adsorption device comprises an electrostatic adsorption ring and a cross-shaped electrostatic adsorption plate, the cross-shaped electrostatic adsorption plate is located on the inner circumference of the electrostatic adsorption ring, and the four ends of the cross-shaped electrostatic adsorption plate are fixedly connected with the inner circle of the electrostatic adsorption ring to form an integrated structure. And the four piezoelectric nozzles are arranged in a shape like a Chinese character'tian 'and are respectively arranged in the four segmentation areas of the cross-shaped electrostatic adsorption plate. According to the utility model, the electrostatic adsorption device is arranged on the periphery of each piezoelectric nozzle, so that satellite drops generated by glass ink due to high viscosity are adsorbed, in-situ ink drop mixing of the glass ink drops at pixel points is realized, a set color is accurately reflected, and high-quality printing of the glass ink on a photovoltaic panel is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of inkjet printing equipment, in particular to an inkjet printing head used for patterning of building integrated photovoltaic panels. Background Art

[0002] As a photovoltaic power generation system that integrates surface building materials (such as tiles, glass windows and curtain walls, etc.) with photovoltaic modules, building integrated photovoltaic panels improve the quality of building landscape while increasing the utilization rate of solar energy per unit building area, making it have a lower energy levelization cost, which is in line with the development trend of green buildings. With the improvement of the level of social modernization, higher demands are placed on photovoltaic panels with colorful and refined patterns. At present, the glass ink used for building integrated photovoltaic pattern printing has the characteristics of high viscosity, and is mainly printed by traditional screen printing preparation process, which is difficult to meet the fast and colorful preparation requirements of inkjet process technology.

[0003] Inkjet printing equipment generally prints pixels by spraying ink onto photovoltaic panels. Specifically, it includes a movable bracket for supporting one or more print heads with inkjet nozzles. The movable bracket moves on the surface of the photovoltaic panel, and according to the command of the controller, the inkjet nozzle sprays ink droplets at an appropriate time, wherein the timing of spraying ink droplets corresponds to the pixel points of the printed pattern. However, the high viscosity of glass ink makes it difficult to control the ink feed rate, ink droplet size and inkjet spray range through inkjet technology. During the inkjet process, satellite ink droplets are easily generated and splashed outside the target printing area, which has an adverse effect on the mixing process of the basic color ink in the array print head, and limits the shape of the printed pattern and the accuracy of the color level. This poor pattern printing quality directly affects the application of inkjet printing technology in the field of building integrated photovoltaics. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an inkjet print head for patterning building integrated photovoltaic panels, which realizes high-throughput preparation process and printing of colorful and fine patterned building integrated photovoltaic panels, and plays an important role in improving the production efficiency and pattern quality of building integrated photovoltaic components.

[0005] The technical solution of the utility model is:

[0006] An inkjet print head used for patterning building integrated photovoltaic panels includes a plurality of inkjet heads arranged in a matrix, each inkjet head includes an inkjet head seat, four piezoelectric nozzles fixed on the inkjet head seat and an electrostatic adsorption device, the electrostatic adsorption device includes an electrostatic adsorption ring and a cross-shaped electrostatic adsorption plate, the cross-shaped electrostatic adsorption plate is located on the inner periphery of the electrostatic adsorption ring, and the four ends of the cross-shaped electrostatic adsorption plate are fixedly connected to the inner ring of the electrostatic adsorption ring to form an integrated structure, and the four piezoelectric nozzles are arranged in a field shape and are respectively arranged in four divided areas of the cross-shaped electrostatic adsorption plate.

[0007] The four piezoelectric nozzles are respectively a red ink piezoelectric nozzle, a yellow ink piezoelectric nozzle, a green ink piezoelectric nozzle and a black ink piezoelectric nozzle.

[0008] The piezoelectric nozzle is provided with an ink pressure chamber, an ink inlet tube, an ink outlet and piezoelectric ceramics. The top of the ink inlet tube is fixed on the inkjet head seat, the bottom end of the ink inlet tube extends into the piezoelectric nozzle and is connected with the top end of the ink pressure chamber, the ink outlet is arranged at the bottom end of the piezoelectric nozzle and is connected with the bottom end of the ink pressure chamber, and the piezoelectric ceramics are evenly arranged along the periphery of the ink pressure chamber.

[0009] The piezoelectric ceramics include multiple top piezoelectric ceramics and multiple side piezoelectric ceramics. The multiple top piezoelectric ceramics are evenly arranged directly above the ink pressure chamber, and the multiple side piezoelectric ceramics are arranged on the outer sides of the ink pressure chamber and the ink outlet and are evenly arranged along the circumference of the ink pressure chamber and the ink outlet.

[0010] The ink inlet tube is provided with a micro-electrically controlled valve.

[0011] The electrostatic adsorption ring and the cross-shaped electrostatic adsorption plate are both hollow structures with vacuum adsorption tubes arranged inside. Adsorption holes connected to the vacuum adsorption tubes are evenly distributed on the bottom surfaces of the electrostatic adsorption ring and the cross-shaped electrostatic adsorption plate, and the vacuum adsorption tubes are connected to an external vacuum pump.

[0012] Advantages of the utility model:

[0013] The utility model arranges an electrostatic adsorption device on the periphery of each piezoelectric nozzle of the inkjet head, thereby adsorbing satellite droplets generated by the high viscosity of the glass ink, so that the glass ink droplets can be mixed with the ink droplets in situ at the pixel point position, and uniformly mixed ink dots can be obtained, which accurately reflect the set color and realize high-quality printing of the glass ink on the photovoltaic panel; the piezoelectric ceramic of the utility model includes a top piezoelectric ceramic and a side piezoelectric ceramic, which comprehensively cover the ink pressure chamber and the ink outlet, and realize multi-directional extrusion of the ink pressure chamber and change of the caliber of the ink outlet through the deformation of the piezoelectric ceramic, so as to quickly realize the process of spraying the glass ink; the utility model is provided with a vacuum adsorption tube, which can regularly vacuum and recover the glass ink adsorbed by the electrostatic adsorption device, so as to ensure the electrostatic adsorption of the electrostatic adsorption device, so that it can realize continuous electrostatic adsorption function during the glass ink jet printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the inkjet head matrix arrangement of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the inkjet head of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the piezoelectric nozzle of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the vacuum adsorption tube arrangement on the inkjet head of the utility model, and "---" is an electric control link.

[0018] Figure markings: 1-inkjet head, 11-piezoelectric nozzle, 12-electrostatic adsorption ring, 13-cross-shaped electrostatic adsorption plate, 14-vacuum adsorption tube, 15-vacuum pump, 16-controller, 111-ink pressure chamber, 112-ink inlet tube, 113-ink outlet, 114-top piezoelectric ceramic, 115-side piezoelectric ceramic. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See Figure 1-Figure 3, an inkjet print head used for patterning building integrated photovoltaic panels, including a plurality of inkjet heads 1 arranged in a matrix, each inkjet head 1 including an inkjet head seat, four piezoelectric nozzles 11 fixed on the inkjet head seat and an electrostatic adsorption device, the electrostatic adsorption device including an electrostatic adsorption ring 12 and a cross-shaped electrostatic adsorption plate 13, the cross-shaped electrostatic adsorption plate 13 is located at the inner periphery of the electrostatic adsorption ring 12, and the four ends of the cross-shaped electrostatic adsorption plate 13 are fixedly connected to the inner ring of the electrostatic adsorption ring 12 to form an integrated structure, the four piezoelectric nozzles 11 are arranged in a field shape and are respectively arranged in four divided areas of the cross-shaped electrostatic adsorption plate 13; wherein the four piezoelectric nozzles 11 are respectively a red ink piezoelectric nozzle, a yellow ink piezoelectric nozzle, a green ink piezoelectric nozzle and a black ink piezoelectric nozzle;

[0021] An ink pressure chamber 111, an ink inlet tube 112, an ink outlet 113, a plurality of top piezoelectric ceramics 114, and a plurality of side piezoelectric ceramics 115 are provided in the piezoelectric nozzle 11. The top of the ink inlet tube 112 is fixed on the inkjet head seat, the bottom end of the ink inlet tube 112 extends into the piezoelectric nozzle 11 and communicates with the top end of the ink pressure chamber 111, a micro-electrically controlled valve is provided on the ink inlet tube 112, the ink outlet 113 is provided at the bottom end of the piezoelectric nozzle 11 and communicates with the bottom end of the ink pressure chamber 111, a plurality of top piezoelectric ceramics 114 are evenly arranged directly above the ink pressure chamber 111, and a plurality of side piezoelectric ceramics 115 are provided on the outer sides of the ink pressure chamber 111 and the ink outlet 113 and are evenly arranged along the circumference of the ink pressure chamber 111 and the ink outlet 113.

[0022] See Figure 4 The electrostatic adsorption ring 12 and the cross-shaped electrostatic adsorption plate 13 are both hollow structures with a vacuum adsorption tube 14 arranged inside. Adsorption holes connected to the vacuum adsorption tube 14 are evenly distributed on the bottom surfaces of the electrostatic adsorption ring 12 and the cross-shaped electrostatic adsorption plate 13. The vacuum adsorption tube 14 is connected to an external vacuum pump 15. The electrical control end of the vacuum pump 15 and the electrical control end of the electrostatic adsorption device are both connected to an external controller 16.

[0023] The working principle of this utility model:

[0024] According to the required pixel size of the print, an electrical signal is given to the side piezoelectric ceramic 115 to change the caliber of the ink outlet 113, and then the micro-electrically controlled valve on the ink inlet tube 112 is opened, and the glass ink enters the ink pressure chamber 111 from the external ink chamber, and then the micro-electrically controlled valve is closed, and multiple top piezoelectric ceramics 114 and multiple side piezoelectric ceramics 115 receive the electrical signal and deform, and the ink pressure chamber 111 is squeezed to reduce the volume, and the ink droplets are squeezed out of the ink pressure chamber 111 and ejected through the ink outlet 113 to achieve printing. While printing, the controller 16 controls the electrostatic adsorption device to start, and the electrostatic adsorption device adsorbs the satellite droplets generated by the high viscosity of the glass ink, so that the main ink droplets are mixed with the ink droplets in situ at the pixel position, and a uniformly mixed ink point is obtained, which accurately reflects the set color, and achieves high-quality printing of glass ink on the photovoltaic panel, thereby completing an inkjet process.

[0025] The vacuuming time interval is set, the controller 16 controls the vacuum pump 15 to start at a fixed time, and the vacuum adsorption tube 14 absorbs the glass ink adsorbed by the electrostatic adsorption device to ensure the adsorption performance of the electrostatic adsorption device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inkjet print head for patterning building integrated photovoltaic panels, characterized in that: It includes multiple inkjet heads arranged in a matrix, each inkjet head includes an inkjet head seat, four piezoelectric nozzles fixed on the inkjet head seat and an electrostatic adsorption device, the electrostatic adsorption device includes an electrostatic adsorption ring and a cross-shaped electrostatic adsorption plate, the cross-shaped electrostatic adsorption plate is located on the inner periphery of the electrostatic adsorption ring, and the four ends of the cross-shaped electrostatic adsorption plate are fixedly connected to the inner ring of the electrostatic adsorption ring to form an integrated structure, the four piezoelectric nozzles are arranged in a field shape and are respectively arranged in four divided areas of the cross-shaped electrostatic adsorption plate.

2. The inkjet print head for patterning building integrated photovoltaic panels according to claim 1, characterized in that: The four piezoelectric nozzles are respectively a red ink piezoelectric nozzle, a yellow ink piezoelectric nozzle, a green ink piezoelectric nozzle and a black ink piezoelectric nozzle.

3. The inkjet print head for patterning building integrated photovoltaic panels according to claim 1, characterized in that: The piezoelectric nozzle is provided with an ink pressure chamber, an ink inlet tube, an ink outlet and piezoelectric ceramics. The top of the ink inlet tube is fixed on the inkjet head seat, the bottom end of the ink inlet tube extends into the piezoelectric nozzle and is connected with the top end of the ink pressure chamber, the ink outlet is arranged at the bottom end of the piezoelectric nozzle and is connected with the bottom end of the ink pressure chamber, and the piezoelectric ceramics are evenly arranged along the periphery of the ink pressure chamber.

4. The inkjet print head for patterning building integrated photovoltaic panels according to claim 3, characterized in that: The piezoelectric ceramics include multiple top piezoelectric ceramics and multiple side piezoelectric ceramics. The multiple top piezoelectric ceramics are evenly arranged directly above the ink pressure chamber, and the multiple side piezoelectric ceramics are arranged on the outer sides of the ink pressure chamber and the ink outlet and are evenly arranged along the circumference of the ink pressure chamber and the ink outlet.

5. The inkjet print head for patterning building integrated photovoltaic panels according to claim 3, characterized in that: The ink inlet tube is provided with a micro-electrically controlled valve.

6. The inkjet print head for patterning building integrated photovoltaic panels according to claim 1, characterized in that: The electrostatic adsorption ring and the cross-shaped electrostatic adsorption plate are both hollow structures with vacuum adsorption tubes arranged inside. Adsorption holes connected to the vacuum adsorption tubes are evenly distributed on the bottom surfaces of the electrostatic adsorption ring and the cross-shaped electrostatic adsorption plate, and the vacuum adsorption tubes are connected to an external vacuum pump.

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