Monocrystalline silicon quartz crucible spraying device for solar cell and method thereof

Abstract

The invention belongs to the technical field of quartz surface treatment, and particularly relates to a monocrystalline silicon quartz crucible spraying device for a solar cell and a method thereof, the monocrystalline silicon quartz crucible spraying device comprises a base and a heat insulation placing container mounted on the end face of the base; a cover plate is arranged above the heat insulation placing container, and a fan-shaped rotating seat is fixedly mounted at the bottom of the heat insulation placing container; the rotary driving unit is arranged above the cover plate and is used for driving the cover plate to rotate; the lifting driving unit is installed on the end face of the base and fixedly connected with the base through the rotating driving unit. The synchronous spraying unit is arranged in the fan-shaped rotating base, and the spraying end of the synchronous spraying unit penetrates through the side wall of the fan-shaped rotating base. According to the spraying device, in the process of spraying the inner wall of the quartz crucible, the phenomenon of downward flowing and spraying hanging of a coating can be prevented, the dissipated coating can be adsorbed and purified, meanwhile, the spraying quality of a coating layer can be rapidly detected, and a defect area can be automatically marked.

Description

Technical Field

[0001] The invention belongs to the technical field of quartz surface treatment, and in particular relates to a single crystal silicon quartz crucible spraying device for solar cells and a method thereof. Background Art

[0002] Single crystal silicon wafers are one of the important components of solar cells. During the production process, quartz crucibles are used to hold molten silicon liquid. Due to the purity requirements of single crystal silicon wafers, the quartz crucible is scrapped after one or several heating and crystal pulling operations. By spraying a layer of special material on the quartz crucible, the crucible's resistance to high temperature and chemical erosion can be enhanced, and the loss of the crucible during use can be reduced.

[0003] At present, when spraying quartz crucible coating, the nozzle is usually controlled to spray a uniform layer of protective coating on the inner wall of the crucible. Since the crucible is bowl-shaped, it is necessary to spray the inner wall and the inner bottom of the crucible. For example, a single crystal quartz crucible spraying device disclosed in patent publication number CN115557710A; However, during the spraying process, since the crucible has a vertical annular inner wall, the sprayed material is prone to dripping under the action of its own weight, which will cause the sprayed material layer to have uneven thickness (usually the thickness of the material layer near the bottom of the crucible is thicker than the material layer at the crucible opening). In the thinner material layer, the material's protection effect on the quartz crucible is insufficient, and an excessively thick material layer will increase thermal resistance and hinder the transfer of heat in the crucible, resulting in uneven temperature distribution inside the crucible, affecting the growth quality and crystallization process of single crystal silicon. Summary of the invention

[0004] The object of the present invention is to provide a single crystal silicon quartz crucible spraying device and method for solar cells in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a single crystal silicon quartz crucible spraying device for solar cells and a method thereof, comprising a base and a heat-insulating container mounted on the end surface of the base, and also comprising: A cover plate is arranged above the heat-insulating container, and a fan-shaped rotating seat is fixedly installed on the bottom of the heat-insulating container; A rotation driving unit is arranged above the cover plate and is used to drive the cover plate to rotate; A lifting drive unit is installed on the end surface of the base and is fixedly connected via the rotation drive unit; A synchronous spraying unit is arranged inside the fan-shaped rotating seat, and a spraying end of the synchronous spraying unit penetrates the side wall of the fan-shaped rotating seat; A heating and air supply unit is arranged inside the fan-shaped rotating seat, and the heating and air supply unit is arranged on one side of the synchronous spraying unit in a counterclockwise direction; An adsorption purification unit is arranged inside the fan-shaped rotating seat and is connected to the air suction end of the heating and air supply unit; A defect detection unit is arranged on the inner wall of the heat-insulating container; The controller is installed on the end surface of the base, and the controller outputs analog digital signals to the computer according to the electrical signals output by the defect detection unit.

[0006] Preferably, the rotary drive unit includes a mounting frame arranged above the cover plate, and a reduction motor electrically connected to the controller is fixedly installed inside the mounting frame, the output shaft of the reduction motor is rotatably connected to the bottom of the mounting frame, and the output shaft of the reduction motor is fixedly connected to the end face of the cover plate, and the outer side wall of the thermal insulation placement container is rotatably connected to a sealing support ring, and the outer diameter of the sealing support ring is smaller than the diameter of the cover plate.

[0007] Preferably, the lifting drive unit includes a support plate fixedly mounted on the end surface of the base, and an electric hydraulic cylinder is fixedly mounted on the end surface of the support plate, an output end of the electric hydraulic cylinder is fixedly connected to the top of the mounting frame, and the electric hydraulic cylinder is electrically connected to the controller.

[0008] Preferably, the synchronous spraying unit includes a spray pipe fixedly inserted inside the fan-shaped rotating seat, and the feed end of the spray pipe passes through the top of the cover plate, the horizontal and vertical side walls of the spray pipe are fixedly connected to multiple first spray heads, and the bend of the spray pipe is fixedly connected to a second spray head, and the spray end of the second spray head is arc-shaped.

[0009] Preferably, the heating air supply unit includes an air pump fixedly mounted on the top of the cover plate, an arc-shaped air inlet cavity is provided inside the fan-shaped rotating seat below the air pump, and an arc-shaped electric heating plate is installed inside the arc-shaped air inlet cavity, the air outlet end of the air pump is connected with the arc-shaped air inlet cavity, the lower cavity wall of the arc-shaped air inlet cavity is provided with an arc-shaped exhaust channel, and the air outlet end of the arc-shaped exhaust channel is arranged at the bend of the spray pipe, the suction end of the air pump is fixedly connected with an intake pipe, and the air pump and the arc-shaped electric heating plate are both electrically connected to the controller.

[0010] Preferably, the adsorption purification unit includes a purification chamber opened inside the fan-shaped rotating seat, the interior of the purification chamber is filled with purification filler, the upper cavity wall of the purification chamber is provided with a feed port, and the feed end of the feed port is installed with a sealing cover, the end face of the sealing cover is fixedly plugged with a connecting pipe, and the connecting pipe and the suction pipe are detachably connected, a ventilation chamber is opened inside the fan-shaped rotating seat at a position between the arc-shaped air inlet chamber and the purification chamber, and a ventilation hole connected to the purification chamber is opened at the lower end of the side wall of the ventilation chamber, an arc-shaped suction hood is fixedly installed on the upper end of the side wall of the fan-shaped rotating seat away from the purification chamber, and a plurality of circular tubes are fixedly plugged between the side wall of the arc-shaped suction hood and the cavity wall of the ventilation chamber.

[0011] Preferably, the defect detection unit includes a plurality of insulating sleeves fixedly connected to the inner wall of the insulating container, and the plurality of insulating sleeves are evenly distributed on the inner wall of the insulating container, an insulating heat conductive block is fixedly installed inside one end of the insulating container, and a thermistor block is fixedly installed on the side wall of each insulating heat conductive block, a plurality of mounting grooves are provided at the bottom of the base, and a primary electromagnetic switch and a secondary electromagnetic switch are fixedly installed inside each mounting groove, and each thermistor block is electrically connected to the corresponding primary electromagnetic switch and secondary electromagnetic switch through a controller.

[0012] A method for spraying a single crystal silicon quartz crucible device for a solar cell, the method comprising the following steps: S1. Install and connect the feed end of the spray pipe with the discharge end of the external spray feeding system, and connect the controller with the external power supply circuit; S2, placing the quartz crucible to be sprayed inside the heat-insulating container, and starting the controller; S3, the controller controls the lifting drive unit to work regularly, and controls the rotation drive unit and the heating air supply unit to work regularly after the lifting drive unit finishes working regularly. At the same time, the controller controls the external spray feeding system to start working; S4, after the timing work of the rotating drive unit and the heating air supply unit in step S3 is completed, the controller controls the spray feeding system to stop working, and controls the heating air supply unit to work regularly again, and the heating temperature of the heating air supply unit in this step is lower than the heating temperature of the heating air supply unit in step S3; S5, after the timing operation of the heating and air supply unit in step S4 is completed, the controller controls the heating and air supply unit to operate at a timing again, and the heating temperature of the heating and air supply unit in this step is higher than the heating temperature of the heating and air supply unit in step S3; S6. The controller outputs a simulated digital signal to the computer according to the electrical signal generated by the defect detection unit in step S5.

[0013] Compared with the existing technology, the advantages of a single crystal silicon quartz crucible spraying device and method for solar cells are: 1. Through the cooperation of the provided base and the heat-insulating placement container, the quartz crucible to be sprayed can be installed, and through the cooperation of the provided cover plate, the fan-shaped rotating seat, the rotating drive unit, the lifting drive unit, the synchronous spraying unit and the controller, the horizontal inner wall and the vertical inner wall of the quartz crucible can be sprayed synchronously, and through the provided heating and air supply unit, during the spraying process, the coating layer that has just been sprayed can be synchronously assisted for preliminary solidification, and in conjunction with the upward airflow, the downward dripping phenomenon of the coating layer that has just been sprayed can be prevented as much as possible, thereby improving the quality of spraying.

[0014] 2. By setting up the adsorption purification unit, the gas source of the heating gas supply unit can be utilized to simultaneously adsorb, collect and purify the scattered paint during the spraying process, thereby preventing the scattered paint from affecting the uniformity of the paint layer sprayed on the inner wall of the quartz crucible, and allowing the hot air to circulate, reducing the waste of heat energy.

[0015] 3. Through the defect detection unit, after the quartz crucible is sprayed, the heat source of the heating gas supply unit can be used to quickly detect the uniformity of the coating layer after the quartz crucible is sprayed, and locate the position where the coating is too thick or too thin, which can facilitate the accurate repair of the quartz crucible coating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a single crystal silicon quartz crucible spraying device and method for solar cells provided by the present invention; Figure 2 It is a cross-sectional structural schematic diagram of a heat-insulating container for a single crystal silicon quartz crucible spraying device and method for a solar cell provided by the present invention (the dotted line in the figure is a quartz crucible); Figure 3 It is a structural schematic diagram of a synchronous spraying unit of a single crystal silicon quartz crucible spraying device and method for solar cells provided by the present invention; Figure 4 It is a structural schematic diagram of a heating and gas supply unit of a single crystal silicon quartz crucible spraying device and method for solar cells provided by the present invention; Figure 5 It is a schematic diagram of the top view of the fan-shaped rotating seat of a single crystal silicon quartz crucible spraying device and method for solar cells provided by the present invention; Figure 6 The present invention provides a single crystal silicon quartz crucible spraying device and method for solar cells. Figure 2 A magnified view of the structure of part A; Figure 7The present invention provides a schematic diagram of the three-dimensional structure of a heat-insulating container for a single crystal silicon quartz crucible spraying device and method for a solar cell.

[0017] In the figure: 1 base, 2 heat insulation placement container, 3 cover plate, 4 fan-shaped rotating seat, 5 rotation drive unit, 51 mounting frame, 52 reduction motor, 53 sealing support ring, 6 lifting drive unit, 61 support plate, 62 electric hydraulic cylinder, 7 synchronous spray unit, 71 spray pipe, 72 first spray head, 73 second spray head, 8 heating air supply unit, 81 air pump, 82 arc-shaped air inlet cavity, 83 arc-shaped electric heating plate, 84 arc-shaped exhaust channel, 85 suction pipe, 9 adsorption purification unit, 91 purification cavity, 92 purification filler, 93 feed port, 94 sealing cover, 95 connecting pipe, 96 ventilation cavity, 97 ventilation hole, 98 arc-shaped suction cover, 99 round tube, 10 defect detection unit, 101 insulation sleeve, 102 insulation heat conductive block, 103 thermistor block, 104 installation slot, 105 first-level electromagnetic switch, 106 second-level electromagnetic switch, 11 controller. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] like Figure 1-Figure 7 As shown, a single crystal silicon quartz crucible spraying device for solar cells includes a base 1 and an insulating placement container 2 installed on the end face of the base 1, and also includes: a cover plate 3, the cover plate 3 is arranged above the insulating placement container 2, a fan-shaped rotating seat 4 is fixedly installed on the bottom of the insulating placement container 2, a rotation drive unit 5 is arranged above the cover plate 3, and is used to drive the cover plate 3 to rotate, the rotation drive unit 5 includes a mounting frame 51 arranged above the cover plate 3, and a reduction motor 52 electrically connected to the controller 11 is fixedly installed inside the mounting frame 51, the output shaft of the reduction motor 52 is rotatably connected to the bottom of the mounting frame 51, and the output shaft of the reduction motor 52 is fixedly connected to the end face of the cover plate 3, the outer wall of the insulating placement container 2 is rotatably connected to a sealing support ring 53, and the outer diameter of the sealing support ring 53 is smaller than the diameter of the cover plate 3, the sealing support ring 53 can support the cover plate 3 and seal the inside of the insulating placement container 2 to a certain extent.

[0020] The lifting drive unit 6 is installed on the end surface of the base 1 and is fixedly connected through the rotation drive unit 5. The lifting drive unit 6 includes a support plate 61 fixedly installed on the end surface of the base 1, and an electric hydraulic cylinder 62 is fixedly installed on the end surface of the support plate 61. The output end of the electric hydraulic cylinder 62 is fixedly connected to the top of the mounting frame 51. The electric hydraulic cylinder 62 is electrically connected to the controller 11. The electric hydraulic cylinder 62 can perform corresponding ejection and retraction operations according to the control signal of the controller 11. This is an existing mature technology, so it will not be elaborated here. The hydraulic station of the electric hydraulic cylinder 62 is not shown in the figure.

[0021] The synchronous spraying unit 7 is arranged inside the fan-shaped rotating seat 4, and the spraying end of the synchronous spraying unit 7 passes through the side wall of the fan-shaped rotating seat 4. The synchronous spraying unit 7 includes a spraying tube 71 fixedly inserted in the fan-shaped rotating seat 4, and the feeding end of the spraying tube 71 passes through the top of the cover plate 3. The horizontal and vertical side walls of the spraying tube 71 are fixedly connected with multiple first spraying heads 72, and the bending part of the spraying tube 71 is fixedly connected with a second spraying head 73, and the spraying end of the second spraying head 73 is arc-shaped. The second spraying head 73 can better spray the paint at the arc-shaped transition between the vertical side wall and the inner bottom of the quartz crucible.

[0022] The heating air supply unit 8 is arranged inside the fan-shaped rotating seat 4, and the heating air supply unit 8 is arranged on one side of the synchronous spraying unit 7 in a counterclockwise direction. The heating air supply unit 8 includes an air pump 81 fixedly installed on the top of the cover plate 3. An arc-shaped air inlet cavity 82 is provided inside the fan-shaped rotating seat 4 at a position below the air pump 81, and an arc-shaped electric heating plate 83 is installed inside the arc-shaped air inlet cavity 82. The air outlet end of the air pump 81 is connected to the arc-shaped air inlet cavity 82, and an arc-shaped exhaust channel 84 is provided on the lower cavity wall of the arc-shaped air inlet cavity 82, and the air outlet end of the arc-shaped exhaust channel 84 is arranged at the bending part of the spray pipe 71. The suction end of the air pump 81 is fixedly connected with an air suction pipe 85. The air pump 81 and the arc-shaped electric heating plate 83 are both electrically connected to the controller 11. The arc-shaped electric heating plate 83 can adjust the corresponding heating temperature according to the control signal of the controller 11. This is an existing mature technology, so it will not be repeated here.

[0023] The adsorption purification unit 9 is arranged inside the fan-shaped rotating seat 4 and is connected to the suction end of the heating air supply unit 8. The adsorption purification unit 9 includes a purification chamber 91 opened inside the fan-shaped rotating seat 4. The interior of the purification chamber 91 is filled with a purification filler 92. The upper cavity wall of the purification chamber 91 is provided with a feed port 93, and a sealing cover 94 is installed at the feed end of the feed port 93. A connecting pipe 95 is fixedly plugged into the end surface of the sealing cover 94, and the connecting pipe 95 is detachably connected to the suction pipe 85. The interior of the fan-shaped rotating seat 4 is located between the arc-shaped air inlet chamber 82 and the purification filler 92. A ventilation cavity 96 is provided between the chemical cavities 91, and a ventilation hole 97 connected to the purification cavity 91 is provided at the lower end of the side wall of the ventilation cavity 96. An arc-shaped suction hood 98 is fixedly installed on the upper end of the side wall of the fan-shaped rotating seat 4 away from the purification cavity 91, and a plurality of round tubes 99 are fixedly connected to the side wall of the arc-shaped suction hood 98 and the cavity wall of the ventilation cavity 96. A material changing port is provided at the bottom of the purification cavity 91, and a detachable bottom cover is installed at the material changing port for convenient replacement of the purification filler 92, which is an adsorptive filler such as activated carbon.

[0024] The defect detection unit 10 is arranged on the inner wall of the heat-insulating container 2, and the controller 11 is installed on the end surface of the base 1, and the controller 11 outputs analog digital signals to the computer according to the electrical signals output by the defect detection unit 10. The defect detection unit 10 includes a plurality of insulating sleeves 101 fixedly connected to the inner wall of the heat-insulating container 2, and the plurality of insulating sleeves 101 are evenly distributed on the inner wall of the heat-insulating container 2. An insulating heat-conducting block 102 is fixedly installed on one end of the heat-insulating container 2 inside each insulating sleeve 101, and a thermistor block 103 is fixedly installed on the side wall of each insulating heat-conducting block 102. A plurality of mounting grooves 104 are provided at the bottom of the base 1, and a primary electromagnetic switch 105 and a secondary electromagnetic switch 106 are fixedly installed inside each mounting groove 104. Each thermistor block 103 is electrically connected to the corresponding primary electromagnetic switch 105 and the secondary electromagnetic switch 106 through the controller 11, and the insulating sleeve 101 cooperates with the insulating heat-conducting block 102 to abut against the outer wall of the quartz crucible, so as to fix the quartz crucible.

[0025] The operating principle of the present invention is described as follows: the feed end of the spray pipe 71 is connected to the discharge end of the external spray feeding system, and the controller 11 is connected to the external power supply circuit, and then the quartz crucible to be sprayed is placed inside the heat-insulating container 2, and the controller 11 is started; After the controller 11 is started, it will control the electric hydraulic cylinder 62 to work regularly. The electric hydraulic cylinder 62 can drive the mounting frame 51 to move down a certain distance, so that the cover plate 3 can be abutted against the top of the sealing support ring 53 through the reduction motor 52. At this time, the fan-shaped rotating seat 4 is inside the quartz crucible to be sprayed. After the electric hydraulic cylinder 62 finishes working regularly, the controller 11 will control the external spray feeding system to start working (the controller 11 is electrically connected to the control end of the external spray feeding system. After the controller 11 outputs an electrical signal to the control end of the spray feeding system, it can start the spray feeding system to feed, and after the output electrical signal disappears, the spray feeding system stops feeding. At this time, the external spray feeding system can input the coating (such as silicon nitride coating) into the spray pipe 71, and finally spray it out through each first spray head 72 and the second spray head 73, and the sprayed coating will cover the inner wall of the quartz crucible, so that the inner wall of the quartz crucible can be sprayed with the coating, and after starting the spray feeding system, the controller 11 will simultaneously control the reduction motor 52 to work regularly, and the reduction motor 52 can drive the cover plate 3 to drive the fan-shaped rotating seat 4 to rotate clockwise at a uniform speed. When the fan-shaped rotating seat 4 rotates clockwise, it can drive the first spray head 72 and the second spray head 73 to rotate synchronously, so that the inner wall of the quartz crucible can be sprayed in a clockwise direction; When the controller 11 starts the reduction motor 52, it will control the air pump 81 and the arc-shaped electric heating plate 83 to work for the first time. The arc-shaped electric heating plate 83 can heat the air inside the arc-shaped air inlet cavity 82 to a certain temperature (the temperature is set according to the specific type of coating to be sprayed. Taking silicon nitride coating as an example, the heating temperature is in the range of 70°C to 80°C), and the air pump 81 can discharge the hot air inside the arc-shaped air inlet cavity 82 through the arc-shaped exhaust channel 84. Since the suction end of the air pump 81 generates negative pressure suction at the arc-shaped suction hood 98 through the suction pipe 85, the connecting pipe 95, the purification chamber 91, the vent 97, the ventilation cavity 96, and the multiple circular tubes 99, the hot air discharged through the arc-shaped exhaust channel 84 will flow to the arc-shaped suction hood 98, thereby causing the airflow to flow upward. When the airflow flows upward, the heat and airflow Under the action, the solvent in the sprayed coating layer can be assisted to evaporate quickly, so that the coating layer just sprayed can be initially solidified, and under the action of the upstream airflow, the gravity effect on the coating layer can be offset to a certain extent. Therefore, the coating layer just sprayed can be better prevented from dripping and hanging down. In the process of spraying, the collision between the sprayed coating and the quartz crucible may generate scattered mist coating. At this time, under the negative pressure suction of the arc-shaped suction hood 98, the scattered mist coating can be sucked into the purification chamber 91. When the airflow passes through the purification chamber 91, the mist coating therein is adsorbed by the purification filler 92 inside the purification chamber 91, so as to avoid the scattered mist coating from falling back to the coating layer surface of the quartz crucible as much as possible, resulting in defects such as uneven spraying and pitting on the coating surface of the quartz crucible. When the reduction motor 52 drives the cover plate 3 to drive the fan-shaped rotating seat 4 to rotate 360°, the timing work of the reduction motor 52 ends. At this time, the controller 11 controls the external spray feeding system to stop working. At this point, the spraying work ends; After the spraying work is completed, the controller 11 controls the air pump 81 and the arc-shaped electric heating plate 83 to work for the second time. In this work, the heating temperature of the arc-shaped electric heating plate 83 is lower than the first working temperature of the arc-shaped electric heating plate 83, and the heating temperature of the arc-shaped electric heating plate 83 is 45°C±1°C. Since the first heating temperature of the arc-shaped electric heating plate 83 is higher than the heating temperature of the arc-shaped electric heating plate 83, when the arc-shaped electric heating plate 83 works for the second time, in conjunction with the work of the air pump 81, the temperature of the coating layer of the quartz crucible can reach 45°C±1°C. After the arc-shaped electric heating plate 83 and the air pump 81 work for 3 minutes, the controller 11 controls the arc-shaped electric heating plate 83 to work for the third time. The working temperature of the arc-shaped electric heating plate 83 is higher than the working temperature of the arc-shaped electric heating plate 83. The first working temperature of the hot plate 83, and the heating temperature of the arc-shaped electric heating plate 83 is at 120°C ± 1°C. At the same time, the controller 11 controls the air pump 81 to continue working. The air pump 81 diffuses the heat heated by the arc-shaped electric heating plate 83 to the surface of the coating layer of the quartz crucible. The heat is transferred to each insulating heat-conducting block 102 through the coating layer and the quartz crucible, so that the temperature of each thermistor block 103 can be increased. After 2 minutes, the controller 11 will connect the connection circuit between each thermistor block 103 and the corresponding first-level electromagnetic switch 105, as well as the connection circuit between the thermistor block 103 and the corresponding second-level electromagnetic switch 106. If the thickness of the coating layer of the quartz crucible is too thick, the thermal resistance of the coating layer will increase. At this time, it can be transferred to the corresponding area The heat at the thermistor block 103 in the domain will become less, resulting in the resistance of the thermistor block 103 being in an excessively large state (the effective temperature detected by the thermistor block 103 is in the range of 0°C to 150°C, within this range, the resistance of the thermistor block 103 decreases as the temperature increases). At this time, the current passed into the corresponding connection circuit of the primary electromagnetic switch 105 and the secondary electromagnetic switch 106 is too small. Therefore, the moving contacts of the primary electromagnetic switch 105 and the secondary electromagnetic switch 106 will not be attracted. Within 10 seconds, if the controller 11 does not receive the closing electrical signal of the primary electromagnetic switch 105 and the secondary electromagnetic switch 106, the controller 11 will close the corresponding position of the thermistor block 103 (each thermistor block 103 has a separate The controller 11 can output the number information corresponding to the thermistor block 103 to the computer, and at the same time output an analog digital signal to the computer. After the analog digital signal is converted by the computer software, it can display the corresponding marking information such as "too thick"). If the thickness of the coating layer of the quartz crucible is uniform and not too thick or too thin, the heat conducted to the thermistor block 103 at the corresponding area is moderate. At this time, the temperature of the thermistor block 103 is moderate, so the resistance of the thermistor block 103 itself is also moderate. At this time, the current passed into the first-level electromagnetic switch 105 is large enough, but the current passed into the second-level electromagnetic switch 106 is not large enough, so the corresponding moving contact of the first-level electromagnetic switch 105 will be immediately attracted.The moving contact of the secondary electromagnetic switch 106 will not be attracted, and the controller 11 will only receive the closing electrical signal of the primary electromagnetic switch 105. At this time, the controller 11 will output the position information corresponding to the thermistor block 103 to the computer (and output an analog digital signal to the computer at the same time. After the analog digital signal is converted by the computer software, it can display corresponding marking information such as "qualified". If the thickness of the coating layer is too thin, the thermal resistance of the coating layer will become smaller. At this time, more heat can be conducted to the thermistor block 103, so the temperature of the thermistor block 103 is too high, so that the resistance of the thermistor block 103 is in a too low state. At this time, the current passed into the primary electromagnetic switch 105 and the secondary electromagnetic switch 106 is too low. The current is too large, so the moving contacts of the primary electromagnetic switch 105 and the secondary electromagnetic switch 106 are both in the attracted state, so the controller 11 will simultaneously receive the closing electrical signals of the primary electromagnetic switch 105 and the secondary electromagnetic switch 106. At this time, the controller 11 will output the position information corresponding to the thermistor block 103 to the computer (and output an analog digital signal to the computer at the same time. After the analog digital signal is converted by the computer software, it can display corresponding marking information such as "too thin"). The computer can record the information of each area of ​​the quartz crucible. If there are unqualified areas in the quartz crucible, then in the subsequent process, the staff can quickly find the defective areas on the quartz crucible according to the recorded information, which is convenient for maintenance.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A single crystal silicon quartz crucible spraying device for solar cells, comprising a base (1) and a heat-insulating container (2) mounted on the end surface of the base (1), characterized in that: Also includes: A cover plate (3) is arranged above the heat-insulating container (2); a fan-shaped rotating seat (4) is fixedly mounted on the bottom of the heat-insulating container (2); A rotation drive unit (5), arranged above the cover plate (3) and used to drive the cover plate (3) to rotate; A lifting drive unit (6) is mounted on the end surface of the base (1) and is fixedly connected via the rotating drive unit (5); A synchronous spraying unit (7) is arranged inside the fan-shaped rotating seat (4), and a spraying end of the synchronous spraying unit (7) penetrates the side wall of the fan-shaped rotating seat (4); A heating air supply unit (8) is arranged inside the fan-shaped rotating seat (4), and the heating air supply unit (8) is arranged on one side of the synchronous spraying unit (7) in a counterclockwise direction; An adsorption purification unit (9) is arranged inside the fan-shaped rotating seat (4) and is connected to the air suction end of the heating and air supply unit (8); A defect detection unit (10) is arranged on the inner wall of the heat-insulating container (2); A controller (11) is mounted on the end surface of the base (1), and the controller (11) outputs an analog digital signal to a computer according to the electrical signal output by the defect detection unit (10).

2. The single crystal silicon quartz crucible spraying device for solar cells according to claim 1, characterized in that: The rotary drive unit (5) comprises a mounting frame (51) arranged above the cover plate (3), and a reduction motor (52) electrically connected to the controller (11) is fixedly mounted inside the mounting frame (51), an output shaft of the reduction motor (52) is rotatably connected to the bottom of the mounting frame (51), and the output shaft of the reduction motor (52) is fixedly connected to the end surface of the cover plate (3), and a sealing support ring (53) is rotatably connected to the outer wall of the heat-insulating placement container (2), and the outer diameter of the sealing support ring (53) is smaller than the diameter of the cover plate (3).

3. The single crystal silicon quartz crucible spraying device for solar cells according to claim 2, characterized in that: The lifting drive unit (6) comprises a support plate (61) fixedly mounted on the end surface of the base (1), and an electric hydraulic cylinder (62) is fixedly mounted on the end surface of the support plate (61), an output end of the electric hydraulic cylinder (62) is fixedly connected to the top of the mounting frame (51), and the electric hydraulic cylinder (62) is electrically connected to the controller (11).

4. The single crystal silicon quartz crucible spraying device for solar cells according to claim 3, characterized in that: The synchronous spraying unit (7) comprises a spraying pipe (71) fixedly inserted into the interior of the fan-shaped rotating seat (4), and a feed end of the spraying pipe (71) passes through the top of the cover plate (3), and the horizontal part and the vertical part side walls of the spraying pipe (71) are fixedly connected to a plurality of first spraying heads (72), and a second spraying head (73) is fixedly connected to the bending part of the spraying pipe (71), and the spraying end of the second spraying head (73) is in an arc shape.

5. The single crystal silicon quartz crucible spraying device for solar cells according to claim 4, characterized in that: The heating air supply unit (8) comprises an air pump (81) fixedly mounted on the top of the cover plate (3); an arc-shaped air inlet cavity (82) is provided inside the fan-shaped rotating seat (4) at a position below the air pump (81); an arc-shaped electric heating plate (83) is installed inside the arc-shaped air inlet cavity (82); an air outlet end of the air pump (81) is connected to the arc-shaped air inlet cavity (82); an arc-shaped exhaust channel (84) is provided on the lower cavity wall of the arc-shaped air inlet cavity (82); and an air outlet end of the arc-shaped exhaust channel (84) is arranged at a bend of the spray pipe (71); an air intake end of the air pump (81) is fixedly connected to an air intake pipe (85); and the air pump (81) and the arc-shaped electric heating plate (83) are both electrically connected to the controller (11).

6. The single crystal silicon quartz crucible spraying device for solar cells according to claim 5, characterized in that: The adsorption purification unit (9) comprises a purification chamber (91) opened inside the fan-shaped rotating seat (4), the interior of the purification chamber (91) is filled with a purification filler (92), an upper chamber wall of the purification chamber (91) is opened with a feed port (93), and a sealing cover (94) is installed at the feed end of the feed port (93), a connecting pipe (95) is fixedly plugged into the end surface of the sealing cover (94), and the connecting pipe (95) is detachably connected to the suction pipe (85), and the fan-shaped rotating seat (4) is provided with a cleaning chamber (91) and a cleaning filler (92) is filled inside the purification chamber (91), a feeding port (93) is opened on the upper chamber wall of the purification chamber (91), and a sealing cover (94) is installed at the feeding end of the feeding port (93), a connecting pipe (95) is fixedly plugged into the end surface of the sealing cover (94), and the connecting pipe (95) is detachably connected to the suction pipe (85), and the fan-shaped rotating seat (4) is provided with a cleaning chamber (91) and a cleaning filler (92) is filled inside the purification chamber (91), ... A ventilation cavity (96) is provided inside the seat (4) at a position between the arc-shaped air inlet cavity (82) and the purification cavity (91), and a ventilation hole (97) communicating with the purification cavity (91) is provided at the lower end of the side wall of the ventilation cavity (96). An arc-shaped suction hood (98) is fixedly mounted on the upper end of the side wall of the fan-shaped rotating seat (4) away from the purification cavity (91), and a plurality of circular tubes (99) are fixedly plugged into the side wall of the arc-shaped suction hood (98) and the cavity wall of the ventilation cavity (96).

7. A single crystal silicon quartz crucible spraying device for solar cells according to claim 6, characterized in that: The defect detection unit (10) comprises a plurality of insulating sleeves (101) fixedly connected to the inner wall of the heat-insulating container (2); the plurality of insulating sleeves (101) are evenly distributed on the inner wall of the heat-insulating container (2); an insulating heat-conducting block (102) is fixedly mounted on one end of the heat-insulating container (2) inside each of the insulating sleeves (101); and a thermistor block (103) is fixedly mounted on the side wall of each of the insulating heat-conducting blocks (102); a plurality of mounting grooves (104) are provided at the bottom of the base (1); and a primary electromagnetic switch (105) and a secondary electromagnetic switch (106) are fixedly mounted inside each of the mounting grooves (104); and each of the thermistor blocks (103) is electrically connected to a corresponding primary electromagnetic switch (105) and a secondary electromagnetic switch (106) through a controller (11).

8. The method of spraying a single crystal silicon quartz crucible for a solar cell according to claim 7, characterized in that: The method comprises the following steps: S1, installing and connecting the feed end of the spray pipe (71) to the discharge end of the external spray feeding system, and connecting the controller (11) to the external power supply circuit; S2, placing the quartz crucible to be sprayed inside the heat-insulating container (2), and starting the controller (11); S3, the controller (11) controls the lifting drive unit (6) to work at a fixed time, and controls the rotation drive unit (5) and the heating and air supply unit (8) to work at a fixed time after the lifting drive unit (6) finishes working at a fixed time. At the same time, the controller (11) controls the external spraying and feeding system to start working; S4, after the rotation drive unit (5) and the heating air supply unit (8) in step S3 have finished their timed operation, the controller (11) controls the spraying and feeding system to stop working, and controls the heating air supply unit (8) to start the timed operation again, wherein the heating temperature of the heating air supply unit (8) in this step is lower than the heating temperature of the heating air supply unit (8) in step S3; S5, after the timing operation of the heating and air supply unit (8) in step S4 is completed, the controller (11) controls the heating and air supply unit (8) to operate at a timing again, and the heating temperature of the heating and air supply unit (8) in this step is higher than the heating temperature of the heating and air supply unit (8) in step S3; S6. The controller (11) outputs a simulated digital signal to a computer according to the electrical signal generated by the defect detection unit (10) in step S5.

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