Anti-static purge device, protective cover and its application in photovoltaic cell production

Abstract

The present invention discloses a static electricity removal purging device, a protective cover and its application in photovoltaic cell production, and relates to the field of photovoltaic technology, including: a fan is installed on the dust removal chamber, and external gas is sucked in by the fan; the filter device is installed at the bottom of the dust removal chamber, and is used to filter the gas sucked in by the fan; the self-cleaning collection mechanism is arranged on the filter device to process the attachments on the surface of the filter device; the static electricity removal mechanism is installed below the filter device, and is used to generate positive and negative ions and neutralize the surface static electricity through clean gas purging. The filter device cooperates with the static electricity removal mechanism to achieve efficient dust removal and static electricity removal effects, and a wind pressure sensor is arranged to monitor the air pressure in the dust removal chamber in real time, so as to judge the blockage of the filter device. When blocked, the self-cleaning collection mechanism is activated to collect impurities on the filter device, and the filter box is replaced and cleaned regularly to realize the non-stop operation of the static electricity removal purging device and ensure the quality of the battery cells.

Description

Technical Field

[0001] The invention relates to a static electricity removal purge device and a protective cover, in particular to a static electricity removal purge device for solar photovoltaic cell production, a protective cover matched with the static electricity removal purge device and applications thereof. Background Art

[0002] In the existing production environment, especially the production environment with high requirements for cleanliness, the workshop height is generally set at about 5m. By installing high-efficiency FFU on the ceiling of the workshop, the indoor positive pressure value is maintained by controlling the fresh air volume and supply air volume. Since the semi-enclosed areas such as the main machine, automated transfer, AGV carts, etc. are generally below 3m during operation, negative pressure areas are prone to occur inside the above-mentioned semi-enclosed areas, which causes the dust particles in the workshop to accumulate in the negative pressure area, affecting the cleanliness of the product.

[0003] However, for products with high cleanliness requirements, such as solar photovoltaic cell silicon wafers, if the cleanliness of the workshop is not high during the production process, impurities may be introduced, causing black spots and other defects on the cell wafers, which will have a great impact on the efficiency and yield of the finished cell wafers.

[0004] Similarly, products that have requirements for static electricity need to strictly control static electricity during manufacturing and transportation. For example, if static electricity exists on the silicon wafer, it will affect the cleanliness and quality of the silicon wafer and affect its structure and performance; static electricity may also affect the production and performance of electrodes on the silicon wafer, resulting in reduced battery efficiency.

[0005] In the prior art, the treatment method for the above-mentioned semi-enclosed area is often to use a fan to blow clean gas into the semi-enclosed area to solve the negative pressure inside, and to use ion wind to eliminate static electricity on the product. However, after a long period of operation, the air filtration device is prone to clogging, causing the clean gas pressure in the semi-enclosed area to gradually decrease, and the amount of positively charged ion air also decreases accordingly. The pressure value in the semi-enclosed area is unstable, and the static electricity on the product cannot be effectively eliminated, resulting in the inability to guarantee the quality of the finished product. Summary of the invention

[0006] The purpose of the present invention is to provide a static electricity removal purge device, a protective cover and their application in photovoltaic cell production. In view of at least one of the above technical problems, the present invention particularly aims to solve the problem that dust removal and static electricity removal devices in existing workshops, especially in semi-enclosed areas for photovoltaic cell production, are prone to blockage, resulting in poor dust removal and static electricity removal effects, affecting product quality and requiring shutdown for maintenance.

[0007] To achieve the above object, the present invention provides the following technical solution: a static electricity removal purge device, comprising:

[0008] A dust removal chamber, wherein a fan is installed in the dust removal chamber, and external air is sucked in by the fan;

[0009] A filter device, the filter device is installed at the bottom of the dust removal chamber and is used to filter the gas sucked in by the fan;

[0010] A self-cleaning collection mechanism, the self-cleaning collection mechanism is arranged on the filter device to process the attached matter on the surface of the filter device; and

[0011] The static electricity removal mechanism is installed below the filtering device and is used to generate positive and negative ions to neutralize the surface static electricity through clean gas purge.

[0012] Preferably, a fan is installed on the top surface of the dust removal chamber;

[0013] The filtering device comprises a filtering frame connected with the dust removal chamber and a filter installed close to or flush with the top surface of the filtering frame;

[0014] The static electricity removal mechanism comprises a base mounted in cooperation with the filter frame, an ion wind needle mounted on the base, and a metal mesh or / and an ion wind rod or / and an ion wind knife arranged below the ion wind needle.

[0015] Preferably, a wind grid for adjusting the gas flow direction is installed under the base.

[0016] Preferably, the dust removal chamber and the filter frame and / or the filter frame and the base are connected by magnets;

[0017] Ear plates staggered left and right are respectively provided on both sides of the dust removal chamber and the filter frame;

[0018] An installation position is reserved on the base for installation.

[0019] Preferably, the dust removal chamber and the filter frame and / or the filter frame and the base are connected by magnets;

[0020] Ear plates staggered left and right are respectively provided on both sides of the dust removal chamber and the filter frame;

[0021] An installation position is reserved on the base for installation.

[0022] Preferably, the self-cleaning collection mechanism comprises:

[0023] A recycler with a U-shaped air duct inside;

[0024] Two sets of telescopic air ducts connected to the air inlet and outlet of the recycler;

[0025] The other ends of the two sets of telescopic air ducts are connected to a cleaning head for blowing and sucking impurities on the filter device; and

[0026] A reciprocating mechanism used to drive the cleaning machine head to make linear motion for cleaning and recovery.

[0027] Preferably, a detachable filter box is installed near the air inlet of the recycler, a filter screen is installed at one end of the filter box away from the air inlet, a fan for circulating the clean gas of the filter screen is installed at the bend of the air duct of the recycler, and an ion wind rod is installed near the air outlet of the recycler;

[0028] The cleaning machine head is provided with a chamber for blowing and neutralizing the electrostatic charge of impurities on the surface of the filter device, and the top of the chamber is connected to the telescopic air duct connected to the air outlet of the recovery device; the cleaning machine head is also provided with a chamber for suction and elimination of electrostatic impurities, and the chamber is connected to the telescopic air duct connected to the air inlet of the recovery device, and the two chambers are separated by a partition with a gap at the bottom;

[0029] A wind pressure sensor is also installed inside the dust removal chamber to monitor the air pressure inside the dust removal chamber.

[0030] Preferably, a shovel plate that fits the filter device is provided at the bottom of the cleaning machine head, and cooperates with the gap at the bottom of the partition to form a suction port;

[0031] The bottom height of the cleaning head on the side facing away from the recycler is higher than the partition plate and is used to emit gas for eliminating the electrostatic charge of surface impurities.

[0032] Preferably, the filter box is embedded in the recycler by magnetic attraction of a magnet.

[0033] A protective cover, comprising:

[0034] A cover body, the top surface of which is provided with the anti-static purge device for removing dust and static electricity from the internal materials;

[0035] The side walls of the cover body are provided with air outlets or air exhaust devices.

[0036] The invention discloses an application of a protective cover in the production of photovoltaic cells. The protective cover is applied to a semi-enclosed processing line and / or a semi-enclosed transfer device of solar photovoltaic cells to remove dust and static electricity from the solar photovoltaic cells.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention can effectively remove dust and static electricity through the filter device in conjunction with the static electricity removal mechanism. In conjunction with the guide structure of the protective cover, it solves the problem of negative pressure in the semi-enclosed area during production, which leads to dust on the product and resulting in defective finished products. A wind pressure sensor is provided to monitor the air pressure in the dust removal chamber in real time, so as to further judge the blockage of the filter device. When blockage occurs, the controller starts the self-cleaning collection mechanism to collect impurities on the filter device. The staff can realize the non-stop operation of the static electricity removal purge device by regularly replacing and cleaning the filter box, thereby ensuring the quality of the finished product.

[0039] The present invention is particularly suitable for removing dust and static electricity from solar photovoltaic cells on a semi-enclosed processing line and / or a semi-enclosed transfer device of solar photovoltaic cells, effectively ensuring the quality of the cell sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of a static electricity removal purge device of the present invention;

[0041] Figure 2 This is a schematic diagram of the explosion decomposition structure of a static electricity removal purge device of the present invention;

[0042] Figure 3 This is a schematic cross-sectional view of a static electricity removal purge device according to the present invention;

[0043] Figure 4 for Figure 3 Schematic diagram of the structure at A in the middle;

[0044] Figure 5 A schematic diagram of a self-cleaning collection structure of a static electricity removal purge device of the present invention;

[0045] Figure 6 A schematic diagram of the structure of a collector of a static electricity removal purge device of the present invention;

[0046] Figure 7 This is a schematic diagram of a static electricity removal purge device and a protective cover structure of the present invention;

[0047] Figure 8 It is a schematic diagram of a static electricity removal purge device and a protective cover applied to a transfer device according to the present invention;

[0048] Fig. 9 The figure is a schematic diagram of the exhaust air flow direction of a static electricity removal purge device of the present invention.

[0049] In the figure: 1. dust removal chamber; 2. fan; 3. filter device; 4. self-cleaning collection mechanism; 5. static electricity removal mechanism; 6. filter frame; 7. filter; 8. ion wind needle; 9. metal mesh; 10. ion wind rod; 11. base; 12. wind grid; 13. magnet; 14. ear plate; 15. collector; 16. telescopic air duct; 17. cleaning machine head; 18. reciprocating mechanism; 19. filter box; 1901, filter net; 20. fan; 21. partition; 22. shovel plate; 23. wind pressure sensor; 24. cover body; 2401, exhaust port. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] See also Figure 1-Figure 9 ,like Figure 1 As shown, a static electricity removal blowing device is composed of a dust removal chamber 1, a filtering device 3, a self-cleaning collection mechanism 4 and a static electricity removal mechanism 5.

[0052] A fan 2 is installed on the dust removal chamber 1, and external air is sucked in through the fan 2; a filter device 3 is installed at the bottom of the dust removal chamber 1, and is used to filter the gas sucked in by the fan 2; a self-cleaning collection mechanism 4 is arranged on the filter device 3 to process the attachments on the surface of the filter device 3; a static electricity removal mechanism 5 is installed below the filter device 3, and is used to generate positive and negative ions and neutralize the surface static electricity charge through clean gas blowing.

[0053] like Figure 7 and Figure 8 As shown, the top surface of a protective cover body 24 is installed with the above-mentioned anti-static blowing device for removing dust and static electricity from internal materials; exhaust ports 2401 are distributed on the side walls of the cover body 24 or devices with active exhaust such as exhaust fans are installed.

[0054] Application of protective cover: Protective cover is used in semi-enclosed processing lines and / or semi-enclosed transfer devices of solar photovoltaic cells to remove dust and static electricity from solar photovoltaic cells.

[0055] In specific implementation, Figure 2 and Figure 3 As shown;

[0056] Dust removal room 1:

[0057] The fan 2 is installed on the top surface of the dust removal chamber 1 .

[0058] Filter device 3:

[0059] A filter frame 6 is provided which is connected to the dust removal chamber 1 and a filter 7 which is installed close to or flush with the top surface of the filter frame 6. The filter 7 can use a nylon filter screen with a smooth surface or an electrostatic dust removal filter to filter the gas.

[0060] Anti-static mechanism 5:

[0061] A base 11 is provided to be installed in coordination with the filter frame 6, and a mounting position is reserved on the base 11 for installation, and the base 11 is installed on the top surface of the protective cover body 24 by means of a clamp or bolt. An ion wind needle 8 is installed on the base 11, and it works in coordination with one or more combinations of a metal mesh 9 or / and an ion wind rod 10 or / and an ion wind knife provided below the ion wind needle 8. The specific coordination selection can be appropriately selected by those skilled in the art according to actual needs, and will not be described in detail here.

[0062] The dust chamber 1 and the filter frame 6 and / or the filter frame 6 and the base 11 are connected by magnets 13; the dust chamber 1 and the filter frame 6 are provided with left and right offset ear plates 14 on both sides; when the dust chamber 1 is removed for inspection and maintenance, the operator applies force upward to the ear plate 14 on the dust chamber 1 and applies force downward to the ear plate 14 on the filter frame 6 to magnetically separate and remove the dust chamber 1. Since the base 11 is fixed on the cover 24, when removing the filter frame 6, it is only necessary to apply force upward to the ear plate 14 to achieve magnetic separation and removal.

[0063] A wind grid 12 for adjusting the gas flow direction is also installed under the base 11.

[0064] Self-cleaning collection mechanism 4:

[0065] like Figure 5 As shown, a collector 15 having a U-shaped air duct inside is provided, and the collector 15 is fixed on the dust removal chamber 1; Figure 6 As shown, a filter box 19 is installed near the air inlet of the recoverer 15 and is magnetically embedded by a magnet 13. A filter screen 1901 is installed at the end of the filter box 19 away from the air inlet. A fan 20 for circulating the clean gas of the filter screen 1901 is installed at the bend of the air duct of the recoverer 15, and an ion wind rod 10 is installed near the air outlet of the recoverer 15.

[0066] The air inlet and outlet of the recovery device 15 are connected to two sets of telescopic air ducts 16; a reciprocating mechanism 18 is installed on the cleaning head 17 to perform linear motion to clean impurities on the recovery filter 7. The reciprocating mechanism 18 uses a linear motor or a screw motor to achieve linear reciprocating motion.

[0067] The cleaning head 17 is provided with a chamber for blowing and neutralizing the electrostatic charge of impurities on the surface of the filter device 3, and the top of the chamber is connected to the telescopic air duct 16 connected to the air outlet of the recovery device 15; the cleaning head 17 is also provided with a chamber for suctioning and eliminating electrostatic impurities, and the chamber is connected to the telescopic air duct 16 connected to the air inlet of the recovery device 15, such as Figure 4 As shown, the two chambers are separated by a partition 21 with a gap at the bottom. The bottom of the chamber where the cleaning head 17 sucks impurities is provided with a shovel plate 22 that fits the filter device 3, and cooperates with the gap at the bottom of the partition 21 to form a suction port, increasing the air flow rate at the suction port for efficient suction recovery. The bottom height of the cleaning head 17 facing away from the collector 15 is higher than the partition 21, which is used to disperse the gas that eliminates the electrostatic charge of surface impurities.

[0068] A wind pressure sensor 23 is also installed inside the dust removal chamber 1 to monitor the air pressure in the dust removal chamber 1. The air pressure value and trigger threshold of the dust-free dust removal chamber 1 of the filter 7 are preset. When blockage occurs in the filter 7 and the bottom air volume becomes smaller, the wind pressure sensor 23 detects that the air pressure is greater than the threshold and feeds back a signal to the controller. The controller issues a command to start the self-cleaning collection mechanism 4 for collection. If the filter 7 adopts an electrostatic dust removal filter, the controller simultaneously turns off the electrostatic dust removal function of the filter 7.

[0069] It should be noted that the anti-static blowing device is installed on the protective cover and applied to the semi-enclosed processing line and / or semi-enclosed transfer device of solar photovoltaic cells to remove dust and static electricity from solar photovoltaic cells. The protective cover body 24 is provided with an exhaust port 2401 or an active exhaust device such as an exhaust fan is installed to guide the flow and prevent internal airflow turbulence.

[0070] During operation, the FFU fan filter device in the workshop performs preliminary filtering, and then further filters through the filter device 3 in the static electricity removal purge device, and the static electricity removal mechanism 5 ionizes the gas after efficient dust removal into a large number of positive and negative ions, which flow into the protective cover through the wind grid 12 (the wind grid 12 is made of insulating material) to neutralize the charges carried by the automated processing line, AGV or other transfer devices, photovoltaic silicon wafers, etc., so as to eliminate static electricity.

[0071] When the filter 7 is clogged and the bottom air volume becomes smaller, the wind pressure sensor 23 detects that the air pressure is greater than the threshold and feeds back the signal to the controller. The controller sends a command to start the self-cleaning collection mechanism 4, and the fan 20, ion wind rod 10 and reciprocating mechanism 18 in the recycler 15 are started. The fan 20 blows air to the air outlet of the recycler 15, and the ion wind rod 10 converts the ionization in the air flow into a large number of positive and negative ions and discharges them to the cleaning head 17 through the telescopic air duct 16 to dissipate and blow on the filter 7 to eliminate the static electricity of impurities and dust. Since the fan 20 blows air to the air outlet, the filter box 19 and the air inlet of the recycler 15 are in a negative pressure state, and the reciprocating mechanism 18 drives the cleaning head 17 to move. The dust on the filter 7 is first collected at the suction port formed by the shovel plate 22 and the partition 21, and then sucked into the filter box 19 through the negative pressure for filtration and collection through the filter net 1901. The staff can regularly remove and replace the filter box 19 to achieve non-stop operation.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A static electricity removal purge device, characterized in that: include: A dust removal chamber (1), wherein a fan (2) is installed on the dust removal chamber (1) and external air is sucked in through the fan (2); A filter device (3), the filter device (3) being installed at the bottom of the dust removal chamber (1) and being used to filter the gas sucked in by the fan (2); A self-cleaning collection mechanism (4), the self-cleaning collection mechanism (4) being arranged on the filter device (3) to process matter attached to the surface of the filter device (3); and A static electricity removal mechanism (5), the static electricity removal mechanism (5) being installed below the filter device (3) and used for generating positive and negative ions to neutralize surface static electricity through clean gas purge; The self-cleaning collection mechanism (4) comprises: A collector (15) having a U-shaped air duct inside; Two sets of telescopic air ducts (16) connected to the air inlet and the air outlet of the recycler (15); The other ends of the two sets of telescopic air ducts (16) are connected to a cleaning machine head (17) for blowing and sucking impurities on the filter device (3); and A reciprocating mechanism (18) for driving the cleaning head (17) to perform linear motion for cleaning and recovery; A detachable filter box (19) is installed near the air inlet of the recovery device (15); a filter screen (1901) is installed at one end of the filter box (19) away from the air inlet; a fan (20) for circulating clean gas from the filter screen (1901) is installed at the bend of the air duct of the recovery device (15); and an ion wind rod (10) is installed near the air outlet of the recovery device (15); The cleaning machine head (17) is provided with a chamber for blowing and neutralizing the electrostatic charge of impurities on the surface of the filter device (3), and the top of the chamber is connected to the telescopic air duct (16) connected to the air outlet of the recovery device (15); the cleaning machine head (17) is also provided with a chamber for suctioning and eliminating electrostatic impurities, and the chamber is connected to the telescopic air duct (16) connected to the air inlet of the recovery device (15), and the two chambers are separated by a partition (21) to leave a gap at the bottom; A wind pressure sensor (23) is also installed inside the dust removal chamber (1) for monitoring the air pressure inside the dust removal chamber (1); The bottom of the cleaning machine head (17) is provided with a shovel plate (22) that fits the filter device (3) and cooperates with the gap at the bottom of the partition plate (21) to form a suction port; The bottom height of the side of the cleaning head (17) facing away from the recycler (15) is higher than the partition (21) and is used to emit gas that eliminates the electrostatic charge of surface impurities.

2. The static electricity removal purge device according to claim 1, characterized in that: A fan (2) is installed on the top surface of the dust removal chamber (1); The filtering device (3) comprises a filtering frame (6) cooperatively connected to the dust removal chamber (1) and a filter (7) installed close to or flush with the top surface of the filtering frame (6); The static electricity removal mechanism (5) comprises a base (11) mounted in cooperation with the filter frame (6), an ion wind needle (8) mounted on the base (11), and a metal mesh (9) or / and an ion wind rod (10) or / and an ion wind knife arranged below the ion wind needle (8).

3. The static electricity removal purge device according to claim 2, characterized in that: A wind grid (12) for adjusting the flow direction of gas is installed below the base (11).

4. The static electricity removal purge device according to claim 2, characterized in that: The dust removal chamber (1) and the filter frame (6) and / or the filter frame (6) and the base (11) are magnetically connected by a magnet (13); Ear plates (14) staggered to the left and right are respectively provided on both sides of the dust removal chamber (1) and the filter frame (6); The base (11) has an installation position reserved thereon for installation.

5. The static electricity removal purge device according to claim 3, characterized in that: The dust removal chamber (1) and the filter frame (6) and / or the filter frame (6) and the base (11) are magnetically connected by a magnet (13); Ear plates (14) staggered to the left and right are respectively provided on both sides of the dust removal chamber (1) and the filter frame (6); The base (11) has an installation position reserved thereon for installation.

6. The static electricity removal purge device according to claim 1, characterized in that: The filter box (19) is magnetically embedded in the recovering device (15) through a magnet (13).

7. A protective cover, characterized in that: include: A cover body (24), the top surface of which is mounted the anti-static purge device according to any one of claims 1 to 6, for removing dust and static electricity from internal materials; An exhaust port (2401) or an exhaust device is distributed on the side wall of the cover body (24).

8. Application of a protective cover in photovoltaic cell production, characterized in that: According to the protective cover described in claim 7, the protective cover is used in a semi-enclosed processing line and / or a semi-enclosed transfer device of solar photovoltaic cells to remove dust and static electricity from solar photovoltaic cells.

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