Single crystal silicon quartz crucible spraying device and method for solar cells

Abstract

The present invention belongs to the field of quartz surface treatment technology, and in particular relates to a single-crystal silicon quartz crucible spraying device for solar cells and a method thereof, comprising a base and an insulating container mounted on the end face of the base; a cover plate disposed above the insulating container, with a fan-shaped rotating seat fixedly mounted on the bottom of the insulating container; a rotation drive unit disposed above the cover plate and used to drive the cover plate to rotate; a lifting drive unit mounted on the end face of the base and fixedly connected via the rotation drive unit; a synchronous spraying unit disposed within the fan-shaped rotating seat, with the spraying end of the synchronous spraying unit penetrating the side wall of the fan-shaped rotating seat. The present invention can prevent the coating from dripping down during the spraying process on the inner wall of the quartz crucible, can absorb and purify the scattered coating, and can quickly detect the spraying quality of the coating layer and automatically mark defective areas.

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 most 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 crucibles are 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 corrosion can be enhanced, reducing the loss of the crucible during use.

[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 inner bottom of the crucible. For example, a single crystal quartz crucible spraying device disclosed in patent publication number CN115557710A;

[0004] 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 during the spraying process, 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 thickness of the material layer at the crucible opening). In the material layer with a smaller thickness, 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, thereby causing uneven temperature distribution inside the crucible and affecting the growth quality and crystallization process of single crystal silicon. Summary of the Invention

[0005] The object of the present invention is to provide a single crystal silicon quartz crucible spraying device and method for solar cells in order to solve the above problems.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: 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 further comprising:

[0007] 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;

[0008] A rotation drive unit is provided above the cover plate and is used to drive the cover plate to rotate;

[0009] A lifting drive unit is mounted on the end surface of the base and is fixedly connected via the rotation drive unit;

[0010] A synchronous spraying unit is arranged inside the sector-shaped rotating seat, and a spraying end of the synchronous spraying unit passes through the side wall of the sector-shaped rotating seat;

[0011] 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;

[0012] 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;

[0013] A defect detection unit is provided on the inner wall of the heat-insulating container;

[0014] 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.

[0015] Preferably, the rotation drive unit includes a mounting bracket arranged above the cover plate, and a reduction motor electrically connected to the controller is fixedly installed inside the mounting bracket, the output shaft of the reduction motor is rotatably connected to the bottom of the mounting bracket, 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 heat-insulating 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.

[0016] Preferably, the lifting drive unit includes a support plate fixedly mounted on the end face of the base, and an electric hydraulic cylinder is fixedly mounted on the end face of the support plate, the 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.

[0017] Preferably, the synchronous spraying unit includes a spraying pipe fixedly inserted into the inside of the fan-shaped rotating seat, and the feed end of the spraying pipe passes through the top of the cover plate, the horizontal and vertical side walls of the spraying pipe are fixedly connected to multiple first spraying heads, and the bending part of the spraying pipe is fixedly connected to a second spraying head, and the spraying end of the second spraying head is arc-shaped.

[0018] 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 to 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 to an intake pipe, and the air pump and the arc-shaped electric heating plate are both electrically connected to the controller.

[0019] 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, the interior of the fan-shaped rotating seat is provided with a ventilation chamber at a position between the arc-shaped air inlet chamber and the purification chamber, and the lower end of the side wall of the ventilation chamber is provided with a ventilation hole connected to the purification chamber, the upper end of the side wall of the fan-shaped rotating seat away from the purification chamber is fixedly installed with an arc-shaped suction hood, and the side wall of the arc-shaped suction hood and the cavity wall of the ventilation chamber are jointly fixedly plugged with multiple circular tubes.

[0020] 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-conducting block is fixedly installed at one end of the interior of each insulating sleeve away from the insulating container, and a thermistor block is fixedly installed on the side wall of each insulating heat-conducting block. A plurality of mounting grooves are provided at the bottom of the base, and a first-level electromagnetic switch and a second-level electromagnetic switch are fixedly installed inside each mounting groove. Each of the thermistor blocks is electrically connected to the corresponding first-level electromagnetic switch and second-level electromagnetic switch through a controller.

[0021] A method for spraying a single crystal silicon quartz crucible device for a solar cell, the method comprising the following steps:

[0022] S1. Connect the feed end of the spray pipe to the discharge end of the external spray feeding system, and connect the controller to the external power supply circuit;

[0023] S2, placing the quartz crucible to be sprayed inside the heat-insulating container and starting the controller;

[0024] S3, the controller controls the lifting drive unit to work regularly, and controls the rotation drive unit and the heating and 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;

[0025] S4, after the rotation drive unit and the heating and air supply unit in step S3 have finished their timing work, the controller controls the spray feeding system to stop working, and controls the heating and air supply unit to start timing work again. The heating temperature of the heating and air supply unit in this step is lower than the heating temperature of the heating and air supply unit in step S3;

[0026] S5, after the heating and air supply unit in step S4 is finished working at a fixed time, the controller controls the heating and air supply unit to work at a fixed time 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;

[0027] S6. The controller outputs a simulated digital signal to the computer according to the electrical signal generated by the defect detection unit.

[0028] Compared with the existing technology, the advantages of a single crystal silicon quartz crucible spraying device for solar cells and the method thereof are:

[0029] 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, fan-shaped rotating seat, rotating drive unit, lifting drive unit, synchronous spraying unit and 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, the coating layer that has just been sprayed can be synchronously assisted to perform preliminary solidification during the spraying process, 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 the spraying.

[0030] 2. By setting up the adsorption purification unit, the gas source of the heating air supply unit can be used 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.

[0031] 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 the position where the coating is too thick or too thin can be located, which can facilitate the accurate repair of the quartz crucible coating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a single crystal silicon quartz crucible spraying device and method for solar cells provided by the present invention;

[0033] Figure 2 This is a schematic cross-sectional view of a heat-insulating container for a single crystal silicon quartz crucible spraying device and method for solar cells provided by the present invention (the dotted line in the figure represents the quartz crucible);

[0034] Figure 3 This 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;

[0035] Figure 4 This is a structural schematic diagram of a heating and gas supply unit of a single crystal silicon quartz crucible spraying device for solar cells and a method thereof provided by the present invention;

[0036] Figure 5This is a schematic top view of the structure of a fan-shaped rotating seat of a single crystal silicon quartz crucible spraying device for solar cells and a method thereof provided by the present invention;

[0037] 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;

[0038] Figure 7 The 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 for solar cells and a method thereof.

[0039] In the figure: 1 base, 2 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 spraying unit, 71 spraying pipe, 72 first spraying head, 73 second spraying 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 hood, 99 round tube, 10 defect detection unit, 101 insulation sleeve, 102 insulation heat conductive block, 103 thermistor block, 104 mounting slot, 105 first-level electromagnetic switch, 106 second-level electromagnetic switch, 11 controller. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0041] 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, and 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 interior of the insulating placement container 2 to a certain extent.

[0042] The lifting drive unit 6 is installed on the end face 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 face of the base 1, and the end face of the support plate 61 is fixedly installed with an electric hydraulic cylinder 62. 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.

[0043] 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 into the fan-shaped rotating seat 4, and the feed 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.

[0044] 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 mounted on the top of the cover plate 3. The interior of the fan-shaped rotating seat 4 is provided with an arc-shaped air inlet chamber 82 at a position below the air pump 81, and an arc-shaped electric heating plate 83 is installed inside the arc-shaped air inlet chamber 82. The air outlet end of the air pump 81 is connected to the arc-shaped air inlet chamber 82, and the lower cavity wall of the arc-shaped air inlet chamber 82 is provided with an arc-shaped exhaust channel 84, and the air outlet end of the arc-shaped exhaust channel 84 is arranged at the bend of the spraying pipe 71. The suction end of the air pump 81 is fixedly connected with an intake 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.

[0045] 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 the feed end of the feed port 93 is installed with a sealing cover 94. The end face of the sealing cover 94 is fixedly plugged with a connecting pipe 95, 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 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 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 circular 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. The purification filler 92 is an adsorbent filler such as activated carbon.

[0046] The defect detection unit 10 is arranged on the inner wall of the insulated placement container 2, and the controller 11 is installed on the end surface of the base 1. 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 insulated placement container 2. The plurality of insulating sleeves 101 are evenly distributed on the inner wall of the insulated placement container 2. An insulating heat-conducting block 102 is fixedly installed at one end of the interior of each insulating sleeve 101 away from the insulated placement container 2, 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 first-level electromagnetic switch 105 and a second-level electromagnetic switch 106 are fixedly installed inside each mounting groove 104. Each thermistor block 103 is electrically connected to the corresponding first-level electromagnetic switch 105 and second-level electromagnetic switch 106 through the controller 11. The insulating sleeve 101 cooperates with the insulating heat-conducting block 102 to abut against the outer wall of the quartz crucible, thereby fixing the quartz crucible.

[0047] The operating principle of the present invention is now described as follows: the feed end of the spray tube 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. Then, the quartz crucible to be sprayed is placed inside the insulating container 2, and the controller 11 is started.

[0048] After the controller 11 is started, it will control the electric hydraulic cylinder 62 to work at a fixed time. 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 at a fixed time, 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. Material), 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 the first spray head 72 and the second spray head 73. 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. After starting the spray feeding system, the controller 11 will simultaneously control the reduction motor 52 to work regularly. The reduction motor 52 can drive the cover plate 3 to drive the sector-shaped rotating seat 4 to rotate clockwise at a constant speed. When the sector-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;

[0049] 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 paint sprayed. Taking silicon nitride paint 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, under the influence of heat and airflow, the heat and airflow are combined. Under the action of the airflow, the solvent in the sprayed paint layer can be assisted to evaporate quickly, so that the newly sprayed paint layer can be initially solidified, and under the action of the upward airflow, the gravity effect on the paint layer can be offset to a certain extent. Therefore, the newly sprayed paint layer can be better prevented from dripping down. In the process of spraying, the collision of the sprayed paint and the quartz crucible may generate scattered mist paint. At this time, under the action of the negative pressure suction of the arc-shaped air hood 98, the scattered mist paint can be sucked into the purification chamber 91. When the airflow passes through the purification chamber 91, the mist paint therein is adsorbed by the purification filler 92 inside the purification chamber 91, thereby preventing the scattered mist paint from falling back to the surface of the paint layer of the quartz crucible as much as possible, resulting in defects such as uneven spraying and pitting on the paint surface of the quartz crucible.

[0050] When the reduction motor 52 drives the cover plate 3 to drive the fan-shaped rotating seat 4 to rotate 360 degrees, the reduction motor 52 ends its timing work. At this time, the controller 11 controls the external spray feeding system to stop working. At this point, the spraying work is finished.

[0051] After the spraying work is completed, the controller 11 will control 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, the work of the air pump 81 can make the temperature of the coating layer of the quartz crucible 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℃±1℃. 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, thereby increasing the temperature of each thermistor block 103. 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 flowing into the connection circuit of the corresponding first-level electromagnetic switch 105 and the second-level electromagnetic switch 106 is too small. Therefore, the moving contacts of the first-level electromagnetic switch 105 and the second-level electromagnetic switch 106 will not be attracted. Within 10 seconds, if the controller 11 does not receive the closing electrical signal of the first-level electromagnetic switch 105 and the second-level 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 corresponding marking information such as "too thick" (the information is output to the computer). If the thickness of the coating layer of the quartz crucible is uniform and not too thick or too thin, the heat transferred to the thermistor block 103 in 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 flowing into the first-level electromagnetic switch 105 is large enough, but the current flowing into the second-level electromagnetic switch 106 is not large enough. Therefore, 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 flowing into the primary electromagnetic switch 105 and the secondary electromagnetic switch 106 is too low. The current is too high, so the moving contacts of the primary and secondary electromagnetic switches 105 and 106 are both in the closed state. Therefore, the controller 11 will simultaneously receive the closing electrical signals from the primary and secondary electromagnetic switches 105 and 106. At this time, the controller 11 will output the position information corresponding to the thermistor block 103 to the computer (and also output an analog-to-digital signal to the computer. After the computer software converts this analog-to-digital signal, it can display corresponding marking information such as "too thin"). The computer can record the information of each area of the quartz crucible. If the quartz crucible contains unqualified areas, the staff in the subsequent process can quickly find the defective areas on the quartz crucible based on the recorded information, facilitating repair.

[0052] 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 principles of the present invention should be included in the scope of protection 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), and a fan-shaped rotating seat (4) is fixedly installed 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 rotation drive unit (5); A synchronous spraying unit (7) is arranged inside the sector-shaped rotating seat (4), and a spraying end of the synchronous spraying unit (7) penetrates the side wall of the sector-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 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 an end surface of the base (1), and the controller (11) outputs analog digital signals to a computer according to the electrical signals output by the defect detection unit (10); The heating air supply unit (8) includes 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); and 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); 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 the feed end of the feed port (93) is installed with a sealing cover (94), the end surface of the sealing cover (94) is fixedly plugged with a connecting pipe (95), and the connecting pipe (95) is detachably connected to the suction pipe (85), and the fan-shaped rotating seat (4) is provided with a purification filler (92), and the upper cavity wall of the purification chamber (91) is provided with a feed port (93), and the feed end of the feed port (93) is installed with a sealing cover (94), and the end surface of the sealing cover (94) is fixedly plugged with a connecting pipe (95), and the connecting pipe (95) is detachably connected to the suction pipe (85). 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 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 circular 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); The defect detection unit (10) includes a plurality of insulating sleeves (101) fixedly connected to the inner wall of the insulating container (2), the plurality of insulating sleeves (101) are evenly distributed on the inner wall of the insulating container (2), an insulating heat-conducting block (102) is fixedly installed at one end of the interior of each insulating sleeve (101) away from the insulating container (2), 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 first-level electromagnetic switch (105) and a second-level electromagnetic switch (106) are fixedly installed inside each mounting groove (104), and each thermistor block (103) is electrically connected to the corresponding first-level electromagnetic switch (105) and second-level electromagnetic switch (106) through a controller (11).

2. A single crystal silicon quartz crucible spraying device for solar cells according to claim 1, characterized in that: The rotary 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), and the outer wall of the heat-insulating 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).

3. A single crystal silicon quartz crucible spraying device for solar cells according to claim 2, characterized in that: The lifting drive unit (6) includes 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), the 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) includes a spraying pipe (71) fixedly inserted into the interior of the fan-shaped rotating seat (4), and the feed end of the spraying pipe (71) passes through the top of the cover plate (3), 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 the bending part of the spraying pipe (71) is fixedly connected to a second spraying head (73), and the spraying end of the second spraying head (73) is arc-shaped.

5. The method for spraying a single crystal silicon quartz crucible for a solar cell according to claim 4, characterized in that: The method comprises the following steps: S1. Connect the feed end of the spray pipe (71) to the discharge end of the external spray feeding system, and connect 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 spray feeding system to start working; S4, after the rotation drive unit (5) and the heating air supply unit (8) have finished their timing work in step S3, the controller (11) controls the spray feeding system to stop working, and controls the heating air supply unit (8) to start timing work again, and 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 heating and air supply unit (8) in step S4 has finished its timed operation, the controller (11) controls the heating and air supply unit (8) to perform the timed operation 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 the computer according to the electrical signal generated by the defect detection unit (10).

Images