Self-cleaning valve

Abstract

The utility model discloses a self -cleaning valve, including valve body, plugging subassembly and dust removal subassembly, be equipped with the air inlet chamber and the air outlet chamber in the valve body, and the air inlet chamber and the air outlet chamber are communicated through the communicating port, be equipped with the air inlet and the air outlet that correspond respectively with the air inlet chamber and the air outlet chamber of the air outlet chamber of valve body, and the air inlet is connected with the outside gas transmission equipment, and the air outlet is connected with vacuum chamber, plugging subassembly includes drive part and plugging part, and plugging part is located in the valve body, drive part is transmission connection with plugging part to drive plugging part to close the communicating port or the air outlet, or, drive part drives plugging part to open the communicating port or the air outlet, dust removal subassembly includes dust collection box and pneumatic part, and the valve body is equipped with the dust removal port with the air outlet chamber, and the dust removal port is connected with dust collection box, and pneumatic part is used for driving the gas in vacuum chamber to flow into dust collection box through the air outlet chamber and from the dust removal port. The self -cleaning valve of the utility model can prevent the foreign matter accumulation in the valve body, avoids the display panel to be contaminated by the foreign matter when gas transmission operation.

Description

Technical Field

[0001] This utility model relates to the field of panel production equipment technology, and in particular to a self-cleaning valve. Background Technology

[0002] During the production process of display panels, vacuum cooling and drying operations are required. For example, in the spray painting process, vacuum cooling and drying equipment is used to dry and cure the organic materials on the display panel, ensuring the stability of the organic materials and thus guaranteeing the yield rate of the display panel. Specifically, such as... Figure 1 and Figure 2 As shown, the display panel 1′ is placed inside the vacuum chamber 2′, and dry cleaning gases such as nitrogen are introduced into the vacuum chamber 2′ through a gas supply pipe to dry and clean the display panel 1′ inside the vacuum chamber 2′. A cleaning valve 3′ is installed on the gas supply pipe to control the opening and closing of the gas supply pipe.

[0003] However, traditional cleaning valves 3' are typically straight-through single-pipe structures, meaning that the inlet and outlet chambers of cleaning valve 3' are separated only by valve seat 301' and valve core 302'. After the display panel 1' is cleaned, the foreign matter 4' cleaned off the display panel 1' remains in the vacuum chamber 2' and partially falls into the outlet end 31' of cleaning valve 3'. Consequently, when cleaning other display panels 1', the dry cleaning gas enters cleaning valve 3' from the inlet end 32' and carries the foreign matter 4' located at the outlet end 31' back to the vacuum chamber 2', blowing up the foreign matter 4' left in the vacuum chamber 2'. This reduces the blowing and cleaning effect on the display panel 1', resulting in foreign matter 4' still adhering to the display panel 1' after the blowing, drying, and cleaning are completed, causing contamination of the display panel 1' and leading to malfunctions in the display panel 1'. In addition, foreign objects 4′ falling into the cleaning valve 3′ can easily cause blockage of the valve seat 301′ of the cleaning valve 3′, affecting the normal use of the cleaning valve 3′. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning valve that can prevent foreign objects from accumulating in the valve body and avoid contamination of the display panel when supplying gas to the display panel.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A self-cleaning valve is provided, including a valve body, a sealing assembly, and a dust removal assembly. The valve body has an air inlet chamber and an air outlet chamber, which are connected by a communication port. The valve body has an air inlet port that is connected to the air inlet chamber and an air outlet port that is connected to the air outlet chamber. The air inlet port is connected to an external gas delivery device, and the air outlet port is connected to a vacuum chamber.

[0007] The blocking assembly includes a driving component and a blocking component, wherein the blocking component is disposed in the valve body; the driving component is pulsatorically connected to the blocking component to drive the blocking component to block the communication port or the air outlet; or, the driving component drives the blocking component to open the communication port or the air outlet.

[0008] The dust removal assembly includes a dust collection box and a pneumatic component. The valve body is also provided with a dust removal port that communicates with the air outlet chamber. The dust removal port is connected to the dust collection box. The pneumatic component is used to drive the gas in the vacuum chamber through the air outlet chamber and flow into the dust collection box from the dust removal port.

[0009] In one embodiment, the sealing member includes a sealing baffle disposed in the air outlet chamber. The sealing baffle has a first position and a second position. When the sealing baffle is in the first position, it blocks the communication port to isolate the communication between the air inlet and the air outlet. When the sealing baffle is in the second position, the air inlet and the air outlet are in communication, and the sealing baffle isolates the communication between the air outlet and the dust removal port.

[0010] In one embodiment, the driving element is a rotary motor or a knob, and the driving element is connected to the sealing plate via a rotating shaft to drive the sealing plate to rotate to the first position or the second position.

[0011] In one embodiment, the sealing partition is provided with a first magnetic element, and the side wall of the air outlet chamber adjacent to the air inlet chamber is provided with a second magnetic element. When the sealing partition is in the first position, the first magnetic element and the second magnetic element are magnetically attracted to each other.

[0012] In one embodiment, a limiting member is provided on one side wall of the air outlet chamber. The limiting member is located on the rotation path of the sealing partition, and when the sealing partition is in the second position, the sealing partition abuts against the limiting member.

[0013] In one embodiment, the air inlet chamber and the air outlet chamber are arranged horizontally at intervals, with the air inlet located at the bottom of the air inlet chamber and the air outlet located at the top of the air outlet chamber.

[0014] In one embodiment, the dust removal assembly further includes a dust removal pipe and a dust removal valve. The dust collection box is connected to the dust removal port through the dust removal pipe. The dust removal valve is disposed on the dust removal pipe to control the opening and closing of the dust removal pipe. The dust removal valve is connected to the pneumatic component and the driving component respectively.

[0015] In one embodiment, the self-cleaning valve further includes an anti-backflow assembly comprising an inclined plate, one end of which is connected to the side wall of the air outlet chamber. The inclined plate has a first end connected to the side wall of the air outlet chamber and a second end away from the side wall of the air outlet chamber, and the distance between the inclined plate and the air outlet gradually increases along the direction from the first end to the second end.

[0016] In one embodiment, the valve body further includes a valve seat and a valve core. The valve seat divides the air intake chamber into a first chamber and a second chamber. The valve seat is provided with through holes that communicate with the first chamber and the second chamber respectively. The first chamber communicates with the air intake port, and the second chamber communicates with the communication port. The valve core is pluggable into the through hole to block or open the through hole.

[0017] In one embodiment, the pneumatic component is a dust collector fan, which is disposed between the dust collection box and the air outlet chamber, with the air inlet of the dust collector fan facing the air outlet chamber and the air outlet of the dust collector fan facing the dust collection box; and / or,

[0018] A bidirectional fan is provided at the air outlet. When the bidirectional fan rotates in a first direction, its air outlet faces the vacuum chamber; when the bidirectional fan rotates in a second direction, its air outlet faces the air outlet chamber. The first direction and the second direction are opposite. And / or,

[0019] A filter element is provided at the connection port.

[0020] The beneficial effects of this utility model are:

[0021] This invention discloses a self-cleaning valve that connects to an external gas supply device at the inlet to introduce dry, clean gas into the inlet chamber. The gas then enters the outlet chamber through a connecting port and finally exits into the vacuum chamber through the outlet, drying and cleaning the display panel located within the vacuum chamber. During gas supply, a driving component activates a sealing component to open the connecting port or outlet, allowing the dry, clean gas to enter from the inlet and exit into the vacuum chamber. When gas supply stops (i.e., the valve is idle), the driving component activates the sealing component to seal the connecting port or outlet, preventing foreign objects from the vacuum chamber from falling into the inlet chamber. This prevents the dry, clean gas from carrying foreign objects back into the vacuum chamber during subsequent gas supply, thus avoiding contamination of the display panel.

[0022] Furthermore, the self-cleaning valve also includes a dust removal component. When the gas supply operation is stopped, the gas in the vacuum chamber is driven by a pneumatic component to flow through the outlet chamber and into the dust collection box from the dust removal port, preventing foreign objects from being left in the vacuum chamber or valve body, thus completing the cleaning of the vacuum chamber and the valve body itself and improving the yield rate of the display panel drying operation. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of a cleaning valve in existing technology. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of a cleaning valve in existing technology. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the self-cleaning valve (gas transmission operation state) in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the self-cleaning valve (dust removal operation state) in an embodiment of this utility model;

[0028] Figure 5 yes Figure 4 Enlarged structural diagram of section A in the middle;

[0029] Figure 6 This is a schematic diagram of the sealing component in an embodiment of this utility model.

[0030] Figure 1 and Figure 2 middle:

[0031] 1′ Display panel; 2′ Vacuum chamber; 3′ Cleaning valve; 301′ Valve seat; 302′ Valve core; 31′ Outlet; 32′ Inlet; 4′ Foreign object;

[0032] Figures 3 to 6 middle:

[0033] 100. Display panel; 200. Foreign object;

[0034] 1. Valve body; 11. Inlet chamber; 111. Inlet port; 1111. First chamber; 1112. Second chamber; 12. Outlet chamber; 121. Outlet port; 13. Connecting port; 131. Filter element; 14. Dust removal port; 15. Valve seat; 151. Through hole; 16. Valve core; 17. Diaphragm; 18. Telescopic spring; 19. Connecting plate; 21. Driving element; 22. Sealing element; 221. Sealing baffle; 222. Rotating shaft; 31. Dust collection box; 32. Pneumatic component; 33. Dust removal pipeline; 34. Dust removal valve; 4. Vacuum chamber; 51. First magnetic element; 52. Second magnetic element; 6. Limiting element; 61. Buffer pad; 7. Inclined plate; 8. Bidirectional fan. Detailed Implementation

[0035] The advantages and features of this invention, as well as methods of implementing them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, this invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided merely to complete the disclosure of this invention and to enable those skilled in the art to fully understand its scope, which is defined only by the scope of the claims. The same reference numerals denote the same constituent elements throughout the specification.

[0036] The present invention will now be described in detail with reference to the accompanying drawings.

[0037] like Figure 3 and Figure 4 As shown, a self-cleaning valve of this embodiment includes a valve body 1, a sealing assembly, and a dust removal assembly. The valve body 1 has an inlet chamber 11 and an outlet chamber 12, which are connected by a connecting port 13. The valve body 1 has an inlet port 111 connected to the inlet chamber 11 and an outlet port 121 connected to the outlet chamber 12, respectively. The inlet port 111 is connected to an external gas supply device (not shown), and the outlet port 121 is connected to a vacuum chamber 4. The sealing assembly includes a driving component 21 and a sealing component 22, which seal... The component 22 is located inside the valve body 1; the driving component 21 is connected to the sealing component 22 to drive the sealing component 22 to block the communication port 13 or the air outlet 121; or, the driving component 21 drives the sealing component 22 to open the communication port 13 or the air outlet 121; the dust removal assembly includes a dust collection box 31 and a pneumatic component 32. The valve body 1 is also provided with a dust removal port 14 communicating with the air outlet 12. The dust removal port 14 is connected to the dust collection box 31. The pneumatic component 32 is used to drive the gas in the vacuum chamber 4 to flow into the dust collection box 31 through the air outlet 12 and from the dust removal port 14.

[0038] In this embodiment, an external gas supply device is connected to the inlet 111 to input dry and clean gas into the inlet chamber 11. The gas then enters the outlet chamber 12 through the connecting port 13 and finally enters the vacuum chamber 4 through the outlet 121, drying and cleaning the display panel 100 located within the vacuum chamber 4. During gas supply, the drive unit 21 drives the sealing unit 22 to open the connecting port 13 or the outlet 121, allowing the dry and clean gas to enter from the inlet 111 and exit from the outlet 121 into the vacuum chamber 4. When gas supply stops, i.e., when the valve body 1 is idle, the drive unit 21 drives the sealing unit 22 to seal the connecting port 13 or the outlet 121, preventing foreign objects 200 from falling into the inlet chamber 11 from the vacuum chamber 4. This prevents the dry and clean gas from bringing the foreign objects 200 back into the vacuum chamber 4 during subsequent gas supply, thus avoiding contamination of the display panel 100.

[0039] Furthermore, the self-cleaning valve also includes a dust removal component. When the gas supply operation is stopped, the gas in the vacuum chamber 4 is driven by the pneumatic component 32 to flow through the outlet chamber 12 and into the dust collection box 31 from the dust removal port 14, so as to prevent foreign objects 200 from being left in the vacuum chamber 4 or the valve body 1, thereby completing the cleaning of the vacuum chamber 4 and the valve body 1 itself and improving the yield of the drying operation of the display panel 100.

[0040] In one embodiment, such as Figure 6 As shown, the sealing component 22 includes a sealing baffle 221, which is disposed within the vent chamber 12. The sealing baffle 221 has a first position and a second position, as shown below. Figure 4 As shown, when the sealing baffle 221 is in the first position, the sealing baffle 221 blocks the connecting port 13, thereby isolating the connection between the air inlet 111 and the air outlet 121. This allows the gas in the vacuum chamber 4 to flow into the dust collection box 31 through the dust removal port 14 under the action of the pneumatic component 32, preventing foreign objects 200 from remaining. Simultaneously, blocking the connecting port 13 also prevents foreign objects 200 from entering the air inlet chamber 11. Figure 3 As shown, when the sealing baffle 221 is in the second position, the air inlet 111 is connected to the air outlet 121, allowing dry and clean gas to enter from the air inlet 111, pass through the connecting port 13, and be transported to the vacuum chamber 4 from the air outlet 121. Furthermore, the sealing baffle 221 isolates the connection between the air outlet 121 and the dust removal port 14, preventing foreign matter 200 from flowing back to the air outlet 121 and entering the vacuum chamber 4 through it during gas delivery operations.

[0041] In one embodiment, the drive component 21 is a rotary motor or a knob, and the sealing component 22 also includes a rotating shaft 222 connected to the sealing partition 221. The rotating shaft 222 is rotatably connected inside the valve body 1. The drive component 21 is connected to the sealing partition 221 via the rotating shaft 222. The drive component 21 drives the rotating shaft 222 to rotate, thereby rotating the sealing partition 221 to a first position or a second position, thereby controlling the blocking or opening of the communication port 13 and the communication state between the air outlet 121 and the dust removal port 14. This design is simple in structure and easy to operate, and can quickly and accurately switch the position of the sealing partition 221 to meet the needs of different working conditions. In actual operation, when a rotary motor is used as the drive component 21, automated control can be achieved, improving the intelligence level of the entire self-cleaning valve. When a knob is used as the drive component 21, it can be used in some scenarios where automation requirements are not high but manual operation is required.

[0042] In one embodiment, such as Figure 5As shown, the sealing baffle 221 is provided with a first magnetic element 51, and the side wall of the outlet chamber 12 adjacent to the inlet chamber 11 is provided with a second magnetic element 52. When the sealing baffle 221 is in the first position, the first magnetic element 51 and the second magnetic element 52 are magnetically attracted to each other. This magnetic attraction design can enhance the stability of the sealing baffle 221 in the first position and prevent the sealing baffle 221 from moving unexpectedly due to airflow impact when the gas flow in the vacuum chamber 4 is driven by the pneumatic component 32, thereby ensuring reliable sealing effect. Moreover, compared with the traditional mechanical locking structure, the magnetic attraction method has the advantages of simple structure, convenient installation, and no wear, which can effectively extend the service life of the sealing baffle 221 and related components. In actual operation, the first magnetic element 51 and the second magnetic element 52 are common magnets. This magnetic attraction design of the magnets will not have too much impact on the rotation flexibility of the sealing baffle 221. When it is necessary to switch the position of the sealing baffle 221, the driving component 21 can still easily drive it to rotate.

[0043] In one embodiment, a limiting member 6 is provided on one side wall of the air outlet chamber 12. The limiting member 6 is located on the rotation path of the sealing partition 221, and when the sealing partition 221 is in the second position, the sealing partition 221 abuts against the limiting member 6. Further, a buffer pad 61 is provided on the side of the limiting member 6 that abuts against the sealing partition 221. The buffer pad 61 can be a soft buffer pad 61 such as sponge or rubber to reduce the impact between the sealing partition 221 and the limiting member 6, protect the sealing partition 221 and the limiting member 6 from bump damage, and extend the service life of the components.

[0044] In one embodiment, the inlet chamber 11 and the outlet chamber 12 are arranged horizontally at intervals. The inlet port 111 is located at the bottom of the inlet chamber 11, and the outlet port 121 is located at the top of the outlet chamber 12. This layout design makes the flow path of gas in the valve body 1 more reasonable. After the dry and clean gas enters from the bottom of the inlet chamber 11, it can smoothly enter the outlet chamber 12 through the connecting port 13 and be output from the top of the outlet chamber 12 to the vacuum chamber 4, which is beneficial to improving the gas delivery efficiency. At the same time, this arrangement also facilitates some maintenance and cleaning work at the bottom of the inlet chamber 11 and the outlet chamber 12. For example, when some filter devices are installed at the bottom of the inlet chamber 11, installation and replacement are more convenient. Moreover, in some special cases, if there is a small amount of liquid residue in the inlet chamber 11 or the outlet chamber 12, this bottom-inlet and top-outlet structure also facilitates the natural discharge of liquid, avoiding the accumulation of liquid from affecting the normal operation of the valve.

[0045] In one embodiment, the dust removal assembly further includes a dust removal pipe 33 and a dust removal valve 34. The dust collection box 31 is connected to the dust removal port 14 via the dust removal pipe 33. The dust removal valve 34 is installed on the dust removal pipe 33 to control the opening and closing of the dust removal pipe 33. The dust removal valve 34 is connected to the pneumatic component 32 and the driving component 21 respectively. In actual operation, the dust removal valve 34, the pneumatic component 32, and the driving component 21 can be connected by electrical or signal connection. When the pneumatic component 32 starts the dust removal operation, it sends an opening signal to the dust removal valve 34 and a signal to the driving component 21 to drive the sealing baffle 221 to rotate to the first position to seal the connection port 13. At this time, the dust removal valve 34 opens the dust removal pipe 33, so that the gas in the vacuum chamber 4 can flow into the dust collection box 31 through the exhaust chamber 12, the dust removal port 14, and the dust removal pipe 33 under the action of the pneumatic component 32. When dust removal is completed or no longer required, the pneumatic component 32 stops the dust removal operation and sends a closing signal to the dust removal valve 34. The dust removal valve 34 then closes the dust removal pipeline 33 to prevent backflow of gas or foreign matter 200. This design allows for precise control of the dust removal process, flexibly opening or closing the dust removal pipeline 33 according to actual needs, improving the overall efficiency and reliability of the self-cleaning valve. Furthermore, automated control can be achieved through electrical or signal connections, reducing manual operation and minimizing the impact of human factors on dust removal efficiency. In practical applications, the control logic of the dust removal valve 34 can be programmed to meet diverse usage scenarios based on different working environments and requirements. For example, the dust removal valve 34 can be set to open and close at set times, or its opening and closing status can be automatically adjusted based on parameters such as gas pressure and foreign matter 200 content within the vacuum chamber 4, achieving more intelligent dust removal control.

[0046] In one embodiment, the self-cleaning valve further includes an anti-backflow component, which includes an inclined plate 7 disposed in the outlet chamber 12. One end of the inclined plate 7 is connected to the side wall of the outlet chamber 12, and the inclined plate 7 is located between the sealing member 22 and the dust removal port 14. The inclined plate 7 has a first end connected to the side wall of the outlet chamber 12 and a second end away from the side wall of the outlet chamber 12. The distance between the inclined plate 7 and the outlet 121 gradually increases along the direction from the first end to the second end. This design ensures that during gas transmission operations, even if a small amount of foreign matter 200 in the outlet chamber 12 tends to move towards the outlet 121 under the influence of the dry and clean gas flow, it will be blocked by the inclined plate 7, preventing it from flowing directly to the outlet 121 and entering the vacuum chamber 4. Simultaneously, when gas delivery is stopped for dust removal, the inclined plate 7 also guides the gas and foreign matter 200 flowing back from the vacuum chamber 4, allowing the foreign matter 200 to flow more smoothly towards the dust removal port 14 and into the dust collection box 31, further improving the backflow prevention and dust removal effect of the self-cleaning valve. Moreover, the inclined plate 7 has a simple structure and is easy to install, without excessively obstructing the gas flow within the valve body 1, ensuring normal gas flow and the normal operation of the entire self-cleaning valve. In actual production, the inclination angle and length of the inclined plate 7 can be rationally designed according to the specific dimensions of the valve body 1 and gas flow rate parameters to achieve the best backflow prevention effect.

[0047] In one embodiment, the valve body 1 further includes a valve seat 15 and a valve core 16. The valve seat 15 divides the air intake chamber 11 into a first chamber 1111 and a second chamber 1112. The valve seat 15 is provided with through holes 151 that respectively connect the first chamber 1111 and the second chamber 1112. The first chamber 1111 is connected to the air inlet 111, and the second chamber 1112 is connected to the connecting port 13. The valve core 16 can be inserted and removed into the through hole 151 to block or open the through hole 151. Specifically, the valve body 1 further includes a diaphragm 17, a telescopic spring 18, and a connecting plate 19. The diaphragm 17 is connected to the telescopic spring 18 through the connecting plate 19. The telescopic spring 18 is sleeved on the outside of the valve core 16. One end of the valve core 16 is connected to the connecting plate 19, and the other end can be inserted and removed into the through hole 151. When the through-hole 151 needs to be closed, external air pressure or a driving device acts on the diaphragm 17, causing it to expand. The diaphragm 17 pushes the connecting plate 19 towards the through-hole 151. The connecting plate 19 overcomes the elastic force of the telescopic spring 18, causing the valve core 16 to insert into the through-hole 151, thereby closing the through-hole 151. Conversely, when gas transmission is performed, the output of external air pressure or the driving device is stopped. The telescopic spring 18 returns to its original deformation, pulling the connecting plate 19 and causing the valve core 16 to move away from the through-hole 151. The through-hole 151 opens, allowing dry and clean gas to enter the second chamber 1112 from the first chamber 1111 through the through-hole 151, and then enter the outlet chamber 12 through the connecting port 13. This design of the valve seat 15 and valve core 16 is simple and reliable, effectively controlling the flow and blockage of gas. Furthermore, the cooperation of the diaphragm 17 and the telescopic spring 18 makes the movement of the valve core 16 smoother, reducing abnormal movement of the valve core 16 caused by airflow impact and improving the stability and reliability of the self-cleaning valve. At the same time, this design also facilitates maintenance and replacement of parts. When the valve core 16, diaphragm 17 or telescopic spring 18 is worn or damaged, it can be easily disassembled and replaced, reducing the cost of use.

[0048] In one embodiment, the pneumatic component 32 is a dust removal fan, positioned between the dust collection box 31 and the exhaust chamber 12. The inlet of the dust removal fan faces the exhaust chamber 12, and the outlet faces the dust collection box 31. When dust removal operation is initiated, the dust removal fan starts operating, generating strong suction to drive the gas in the vacuum chamber 4 through the exhaust chamber 12 and into the dust collection port 14, then flowing into the dust collection box 31 through the dust removal pipe 33. This design can quickly and effectively extract foreign matter 200 and gas from the vacuum chamber 4, improving dust removal efficiency. Moreover, the dust removal fan has a simple structure, low cost, and is convenient to install and maintain. In practical applications, a dust removal fan with appropriate power and specifications can be selected based on factors such as the size of the vacuum chamber 4 and the content of foreign matter 200 to meet different dust removal needs. Furthermore, in order to improve the working effect of the dust removal fan, a filter screen can be installed at the air inlet of the dust removal fan to filter out larger particulate matter 200, preventing it from entering the dust removal fan and affecting the normal operation and service life of the fan.

[0049] In one embodiment, a bidirectional fan 8 is provided at the air outlet 121. When the bidirectional fan 8 rotates in a first direction, its air outlet faces the vacuum chamber 4. When the bidirectional fan 8 rotates in a second direction, its air outlet faces the air outlet chamber 12. The first and second directions are opposite. Specifically, when dry cleaning gas is introduced into the vacuum chamber 4, the bidirectional fan 8 rotates in the first direction, and its air outlet faces the vacuum chamber 4. This provides a faster flow rate of the dry cleaning gas, increases its kinetic energy, improves its drying efficiency, and allows the dry cleaning gas to more easily blow away foreign objects 200 on the display panel 100, thus improving the cleaning effect of the dry cleaning gas on the display panel 100 in the vacuum chamber 4. When dust removal is required, the bidirectional fan 8 rotates in the second direction, which is opposite to the first direction. At this time, the air outlet of the bidirectional fan 8 faces the air outlet chamber 12, which can accelerate the flow speed of air in the vacuum chamber 4 to the air outlet chamber 12 and increase the suction force on foreign objects 200 in the vacuum chamber 4. This allows the foreign objects 200 in the vacuum chamber 4 to be completely sucked into the air outlet chamber 12 as much as possible, and then enter the dust collection box 31 through the dust removal port 14, thereby improving the cleaning effect on the vacuum chamber 4 and the valve body 1 itself.

[0050] In one embodiment, a filter element 131 is provided at the connection port 13. In actual operation, the filter element 131 can be a filter screen or a dust curtain, thereby effectively preventing foreign objects 200 in the vacuum chamber 4 and the outlet chamber 12 from falling into the inlet chamber 11, and preventing foreign objects 200 from being brought back into the vacuum chamber 4 and contaminating the display panel 100 when gas is supplied again. At the same time, it can also prevent foreign objects 200 from falling into the inlet chamber 11 and causing blockage of the through hole 151 on the valve seat 15, that is, prevent the valve body 1 from becoming blocked. In addition, by setting the filter element 131, it can also prevent foreign objects 200 in the inlet chamber 11 from entering the outlet chamber 12 through the connection port 13, and prevent the input dry and clean gas from bringing in foreign objects 200 and contaminating the display panel 100. Of course, in actual operation, other filter element 131 structures can also be used, as long as they can achieve the purpose of filtering and blocking foreign objects 200. Such designs are all within the protection scope of this utility model.

[0051] Obviously, although embodiments of the present invention have been described above with reference to the accompanying drawings, these are merely illustrative examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the protection scope of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A self-cleaning valve, characterized in that, include: The valve body has an inlet chamber and an outlet chamber, which are connected by a communication port. The valve body has an inlet port that is connected to the inlet chamber and an outlet port that is connected to the outlet chamber. The inlet port is connected to an external gas delivery device, and the outlet port is connected to a vacuum chamber. A blocking assembly, comprising a driving component and a blocking component, wherein the blocking component is disposed within the valve body; the driving component is pulsatorically connected to the blocking component to drive the blocking component to block the communication port or the air outlet; or, the driving component drives the blocking component to open the communication port or the air outlet. A dust removal assembly includes a dust collection box and a pneumatic component. The valve body is also provided with a dust removal port communicating with the air outlet chamber. The dust removal port is connected to the dust collection box. The pneumatic component is used to drive the gas in the vacuum chamber to flow into the dust collection box through the air outlet chamber and from the dust removal port.

2. The self-cleaning valve according to claim 1, characterized in that, The sealing component includes a sealing baffle plate disposed in the air outlet chamber. The sealing baffle plate has a first position and a second position. When the sealing baffle plate is in the first position, it blocks the communication port to isolate the communication between the air inlet and the air outlet. When the sealing baffle plate is in the second position, the air inlet and the air outlet are connected, and the sealing baffle plate isolates the communication between the air outlet and the dust removal port.

3. The self-cleaning valve according to claim 2, characterized in that, The driving component is a rotary motor or a knob, and the driving component is connected to the sealing plate via a rotating shaft to drive the sealing plate to rotate to the first position or the second position.

4. The self-cleaning valve according to claim 2, characterized in that, The sealing baffle is provided with a first magnetic element, and the side wall of the air outlet chamber adjacent to the air inlet chamber is provided with a second magnetic element. When the sealing baffle is in the first position, the first magnetic element and the second magnetic element are magnetically attracted to each other.

5. The self-cleaning valve according to claim 2, characterized in that, A limiting member is provided on one side wall of the air outlet chamber. The limiting member is located on the rotation path of the sealing partition. When the sealing partition is in the second position, the sealing partition abuts against the limiting member.

6. The self-cleaning valve according to any one of claims 1 to 5, characterized in that, The air inlet chamber and the air outlet chamber are arranged horizontally at intervals, with the air inlet located at the bottom of the air inlet chamber and the air outlet located at the top of the air outlet chamber.

7. The self-cleaning valve according to any one of claims 1 to 5, characterized in that, The dust removal assembly also includes a dust removal pipe and a dust removal valve. The dust collection box is connected to the dust removal port through the dust removal pipe. The dust removal valve is installed on the dust removal pipe to control the opening and closing of the dust removal pipe. The dust removal valve is connected to the pneumatic component and the driving component respectively.

8. The self-cleaning valve according to any one of claims 1 to 5, characterized in that, It also includes an anti-backflow component, which includes an inclined plate. One end of the inclined plate is connected to the side wall of the air outlet chamber. The inclined plate has a first end connected to the side wall of the air outlet chamber and a second end away from the side wall of the air outlet chamber. The distance between the inclined plate and the air outlet gradually increases along the direction from the first end to the second end.

9. The self-cleaning valve according to any one of claims 1 to 5, characterized in that, The valve body also includes a valve seat and a valve core. The valve seat divides the air intake chamber into a first chamber and a second chamber. The valve seat is provided with through holes that connect the first chamber and the second chamber respectively. The first chamber is connected to the air intake port, and the second chamber is connected to the connecting port. The valve core can be inserted and removed into the through hole to block or open the through hole.

10. The self-cleaning valve according to any one of claims 1 to 5, characterized in that, The pneumatic component is a dust collector fan, which is located between the dust collection box and the air outlet chamber. The air inlet of the dust collector fan faces the air outlet chamber, and the air outlet of the dust collector fan faces the dust collection box; and / or, A bidirectional fan is provided at the air outlet. When the bidirectional fan rotates in a first direction, its air outlet faces the vacuum chamber; when the bidirectional fan rotates in a second direction, its air outlet faces the air outlet chamber. The first direction and the second direction are opposite. And / or, A filter element is provided at the connection port.

Images