Dust collecting and exhausting device of dryer

Abstract

The present invention provides a dust collecting and exhausting device for a dryer, which belongs to the technical field of dust collecting and exhausting, and comprises an exhaust pipe, a box body, and a filtering mechanism connected to the dryer; a drainage pipe is arranged above the box body, and a fan is connected to the drainage pipe; a filter chamber and an energy storage chamber are arranged in the box body, both of which are communicated with the drainage pipe; the filtering mechanism comprises a filter element arranged in the filter chamber, a scraper slidably connected in the filter element, and a sleeve slidably connected to the outside of the filter element; a push rod is fixedly connected between the sleeve and the scraper; a partition is arranged in the energy storage chamber, a sleeve limiting assembly capable of limiting the position of the sleeve and a partition limiting assembly capable of limiting the position of the partition are arranged in the energy storage chamber, and a coil spring capable of driving the sleeve to move is arranged in the energy storage chamber. The scraper of the present invention can scrape off the dust on the filter element, and can realize the self-cleaning of the filter element without disassembling the filter element, thereby reducing the labor and efficiency impact caused by disassembling the machine.

Description

Technical Field

[0001] The invention relates to the technical field of dust collection and exhaust, and in particular to a dust collection and exhaust device of a dryer. Background Art

[0002] A dryer refers to a mechanical device that uses heat energy to reduce the moisture content of materials. The moisture in the material is vaporized and released by heating to obtain solid materials with a specified moisture content. During the operation of the dryer, the moisture in the material will be evaporated, and some fine dust and impurities may be discharged along with the airflow. Therefore, during the use of the dryer, it is usually equipped with a dust collection and exhaust device. The dust collection and exhaust device is generally equipped with a filtering mechanism that can effectively capture these dust and impurities and prevent them from entering the atmosphere, thereby reducing environmental pollution. Since the dust and impurities discharged by the dryer contain a certain amount of humidity, they are easy to clog the filter in the filtering mechanism, affecting the filtering effect. The solution in the prior art is to replace the filter. On the one hand, it is not easy to control the appropriate replacement time of the filter. On the other hand, the equipment needs to be shut down, affecting production efficiency.

[0003] The Chinese patent document with publication number CN219511231U discloses a dust collection and exhaust device for a dryer. The connecting pipe at one end of the box is connected to the exhaust pipe of the dryer. The fan draws the dusty and wet air in the dryer into the box through the connecting pipe, and the dust collection filter and the moisture absorption filter perform dust collection and dehumidification operations in the box in turn, and then discharge the dust under the action of the fan. The camera and the fill light observe the specific use status of the dust collection filter. When the maximum use limit is reached, the dust collection filter and the moisture absorption filter are lifted out by the handle to complete the replacement. Although the air collection and exhaust device can observe the use status of the dust collection filter, it is still necessary to shut down the equipment and disassemble the dust collection filter for replacement, which is time-consuming and labor-intensive. The dust collection and exhaust device cannot perform adaptive cleaning on the filter. Summary of the invention

[0004] In view of this, the present invention provides a dust collecting and exhausting device for a dryer, aiming to solve the technical problem that the dust collecting and exhausting device in the prior art cannot perform adaptive cleaning on the filtering mechanism.

[0005] In order to solve the above technical problems, the present invention provides a dust collecting and exhausting device for a dryer, comprising an exhaust pipe connected to the dryer, a box body, and a filtering mechanism; a drainage pipe is provided above the box body, and a fan is connected to the drainage pipe; a filtering chamber and an energy storage chamber are provided in the box body, both of which are communicated with the drainage pipe;

[0006] The filtering mechanism comprises a filter element arranged in the filter chamber and communicating with the exhaust pipe, a scraper slidably connected to the filter element for cleaning dust, and a sleeve slidably connected to the outside of the filter element; a push rod is fixedly connected between the sleeve and the scraper, and one end of the sleeve extends into the energy storage chamber;

[0007] A partition that can move under negative pressure is provided in the energy storage chamber, a sleeve limiting assembly that can limit the sleeve and a partition limiting assembly that can limit the partition are provided in the energy storage chamber, the limitation of the sleeve by the sleeve limiting assembly can be released by movement of the partition, and the limitation of the partition by the partition limiting assembly can be released by reverse movement of the sleeve, and a coil spring that can drive the sleeve to move is provided in the energy storage chamber.

[0008] By adopting the above technical solution, the fan is started to form a negative pressure in the energy storage chamber, and the partition moves backward. When the partition drives the sleeve limit assembly to release the limit on the sleeve, the partition limit assembly limits the partition, and the gas mixed with dust in the dryer enters the filter chamber through the exhaust pipe. When the air pressure in the sleeve is greater than the force of the torsion spring, the scraper, the push rod and the sleeve move backward, and the filter element at the front end is exposed. After the exhaust gas is filtered by the filter element, it enters the drainage pipe and is discharged through the fan. When the filter element at the front end is blocked, the sleeve moves backward again under the action of the air pressure, and a section of the filter element is exposed again to continue filtering the exhaust gas. When the dryer stops drying, the fan also stops. The sleeve drives the partition limit assembly to move forward under the action of the coil spring, and the partition is released. Under the action of the elastic force, the sleeve moves forward, and the sleeve and the scraper are subject to the combined force of the coil spring and the partition, and can move forward quickly and return to the original position. The scraper can scrape off the dust blocked on the filter element, and realize the self-cleaning of the filter element.

[0009] Preferably, the sleeve limit assembly includes a sleeve limit block elastically connected to the inner wall of the energy storage chamber and a connecting rod connected to the sleeve limit block; the sleeve limit block is provided with an inclined groove, one end of the connecting rod is provided with a connecting hole that can be clamped in the inclined groove to drive the sleeve limit block to move, and the other end of the connecting rod is vertically provided with a connecting plate, and the connecting plate can contact the partition.

[0010] By adopting the above technical solution, the partition moves backward under the action of negative pressure. When the partition moves backward to contact the connecting plate, it drives the connecting rod to move backward, the connecting hole is stuck in the inclined groove 1, and the sleeve limit block is driven to move away from the sleeve, and the sleeve is released from the limit. When the dryer is stopped, the sleeve moves forward, the partition limit assembly releases the limit on the partition, the partition moves forward and separates from the connecting plate. When the sleeve is reset, the sleeve limit block limits the sleeve again under the action of elastic force.

[0011] Preferably, the partition limit assembly includes a stopper elastically connected to one end of the sleeve extending into the energy storage chamber, a top block arranged on the partition capable of pushing the stopper to move, a partition limiter elastically connected to the bottom of the energy storage chamber, and a rack slidably connected to the bottom of the energy storage chamber capable of contacting the stopper, one end of the rack being connected to the partition limiter.

[0012] By adopting the above technical solution, in the initial position, the sleeve limit block limits the sleeve, and the top block supports the stopper. When the partition moves backward due to negative pressure, the top block and the stopper are separated, and the stopper and the rack collide. When the partition moves to the rear of the partition limit block, the partition limit block bounces up under the action of elastic force to limit the partition. At this time, the partition drives the connecting plate to move, so that the sleeve limit block releases the limit on the sleeve. When the dryer stops, the sleeve moves forward, the stopper drives the rack to move forward, and the rack drives the partition limit block to move, releasing the limit on the partition, and the partition moves forward under the action of elastic force.

[0013] Preferably, two inclined grooves are provided on both sides of the partition limit block, a clamping groove is opened at one end of the rack, and connecting columns are provided on both sides of the clamping groove which can be clamped in the two inclined grooves to drive the partition limit block to move.

[0014] By adopting the above technical solution, when the partition moves to the rear of the partition limit block, the partition limit block pops up to limit the partition. When the rack moves forward, the connecting column drives the partition limit block to descend through the second inclined groove to release the limit on the partition.

[0015] Preferably, a plurality of the sleeves are arranged side by side, and two adjacent sleeves are fixedly connected, the sleeve limit blocks limit the sleeves on both sides, and the stop blocks are arranged at the ends of the sleeves located in the middle.

[0016] By adopting the above technical solution, a filter element is arranged in the sleeve, which can improve the filtering efficiency of the gas. The sleeve is limited by the sleeve limit blocks on both sides of the energy storage chamber. When the sleeve moves forward, the block drives the rack to move.

[0017] Preferably, the end of the sleeve is fixedly connected to a connecting frame, the block is arranged inside the connecting frame, the top of the block is elastically connected to the connecting frame, the upper part of the block is provided with a slope 1, the lower part of the block is provided with a slope 2 that can drive the rack to move, and the top block is provided with a slope 3 that can push the slope 1 to move.

[0018] By adopting the above technical solution, the stopper is vertically connected to the connecting frame. When the third bevel lifts the first bevel, the second bevel is separated from the rack; when the third bevel is separated from the first bevel, the second bevel contacts the rack and can drive the rack to move.

[0019] Preferably, an air blowing head is fixedly connected to one end of the sleeve away from the energy storage chamber, and an air hole is provided on the air blowing head.

[0020] By adopting the above technical solution, the gas generated by the sleeve during the movement is blown out from the air holes of the blowing head toward the filter element, thereby increasing the cleaning effect of the scraper on the filter element.

[0021] Preferably, a spring pull rod is connected between the partition and the energy storage chamber.

[0022] By adopting the above technical solution, the spring pull rod guides the movement of the partition. At the same time, when the fan is stopped, the partition can be pushed to move under the action of elastic force.

[0023] Preferably, a guide cover is connected between the filter chamber and the exhaust pipe, an exhaust chamber is provided at one end of the filter chamber close to the guide cover, the filter element is connected to the exhaust chamber, a dust box is provided below the exhaust chamber, and a push plate is provided on the push rod that can push dust into the dust box.

[0024] By adopting the above technical solution, the gas generated by the dryer enters the exhaust pipe, enters the exhaust chamber under the guidance of the deflector, and then enters the filter element for filtration, preventing the gas from directly entering the filter chamber without passing through the filter element, causing insufficient filtering effect. After the dryer is stopped, the sleeve drives the scraper and the push plate to move forward quickly, the scraper scrapes off the dust on the filter element, and the push plate pushes the dust into the dust box to clean the dust.

[0025] Preferably, a return pipe is sleeved on the exhaust pipe, one end of the return pipe is fixedly connected to the exhaust port of the dryer, the other end of the return pipe is fixedly connected to the guide cover, the end of the drainage pipe is connected to the return pipe, and the fan is arranged on the return pipe.

[0026] By adopting the above technical solution, the exhaust gas generated by the dryer is cleaned by the filtering mechanism, enters the drainage pipe, and then reaches the return pipe. The residual heat of the exhaust gas can heat the exhaust pipe, reduce the temperature difference at the exhaust pipe, and reduce the impact of condensation at the exhaust pipe on the drying efficiency.

[0027] The beneficial effects of the above technical solution of the present invention are as follows:

[0028] 1. The scraper of the present invention can scrape off the dust on the filter element, and can realize the self-cleaning of the filter element without disassembling the filter element, thereby reducing the labor increase and the influence on efficiency due to disassembly.

[0029] 2. Before the scraper scrapes off the dust on the filter element, the present invention first blows air to the filter element, thereby increasing the cleaning effect of the scraper on the filter element and helping to extend the service life of the filter element.

[0030] 3. The dust cleaned by the scraper of the present invention can be pushed into the dust collecting box through the push plate, so that the dust can be cleaned out, reducing the inconvenience of disassembling the machine.

[0031] 4. The waste heat of the exhaust gas of the present invention can heat the exhaust pipe, reduce the temperature difference at the exhaust pipe, and reduce the influence of condensation at the exhaust pipe on the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the dust collecting and exhausting device of the dryer of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure inside the box of the present invention;

[0034] Figure 3 It is a front view of the filtering mechanism of the present invention;

[0035] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0036] Figure 5 It is a structural schematic diagram of the sleeve limiting assembly of the present invention;

[0037] Figure 6 It is a schematic diagram of the structure of the partition limit block and the rack of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of the partition in the initial state of the present invention;

[0039] Figure 8 It is a structural schematic diagram of the partition of the present invention during the forward movement process;

[0040] Fig. 9 It is a schematic structural diagram of the top block of the partition of the present invention supporting the stop block.

[0041] In the figure: 1. dryer; 2. exhaust pipe; 3. box; 4. drainage pipe; 5. fan; 6. filter chamber; 7. energy storage chamber; 8. filter element; 9. scraper; 10. sleeve; 11. push rod; 12. partition; 13. coil spring; 14. sleeve limit block; 15. connecting rod; 16. inclined slot 1; 17. connecting hole; 18. connecting plate; 19. block; 20. top block; 21. partition limit block; 22. rack; 23. inclined slot 2; 24. connecting column; 25. connecting frame; 26. inclined plane 1; 27. inclined plane 2; 28. inclined plane 3; 29. ​​blowing head; 30. spring pull rod; 31. guide cover; 32. exhaust chamber; 33. dust collecting box; 34. push plate; 35. return pipe. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 9 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0043] Example

[0044] This embodiment provides a dust collecting and exhausting device for a dryer, such as Figure 1 As shown, it includes an exhaust pipe 2 connected to the dryer 1, a box body 3 connected to the exhaust pipe 2, and a filtering mechanism arranged in the box body 3; a drainage pipe 4 is arranged above the box body 3, and a fan 5 is connected to the drainage pipe 4; a filtering chamber 6 and an energy storage chamber 7 are arranged in the box body 3, both of which are communicated with the drainage pipe 4; drainage ports are arranged above the filtering chamber 6 and the energy storage chamber 7, and the drainage ports are connected to the drainage pipe 4;

[0045] like Figure 1-Figure 4 As shown, the filtering mechanism includes a filter element 8 arranged in a filter chamber 6 and communicating with the exhaust pipe 2, a scraper 9 slidably connected in the filter element 8 for cleaning dust, and a sleeve 10 slidably connected to the outside of the filter element 8; a push rod 11 is fixedly connected between the sleeve 10 and the scraper 9, one end of the sleeve 10 extends into the energy storage chamber 7, and the filter element 8 is a cylindrical structure.

[0046] like Figure 1 and Figure 2 As shown, a partition 12 which can move under negative pressure is provided in the energy storage chamber 7, a sleeve limiting assembly which can limit the sleeve 10 and a partition limiting assembly which can limit the partition 12 are provided in the energy storage chamber 7, the limitation of the sleeve 10 by the sleeve limiting assembly can be released by the movement of the partition 12, and the limitation of the partition 12 by the partition limiting assembly can be released by the reverse movement of the sleeve 10, a coil spring 13 which can drive the sleeve 10 to move is provided in the energy storage chamber 7, a plurality of coil springs 13 can be provided, and three are provided in the present embodiment, which are respectively located above the sleeve 10, and the ends of the coil spring 13 are connected to the ends of the sleeve 10. When the dryer 1 is started, it can balance the gas pressure in the sleeve 10, and when the filter element 8 is blocked, the sleeve 10 can be stably moved backward.

[0047] Start the fan 5 to form a negative pressure in the energy storage chamber 7, and the partition 12 moves backward, driving the sleeve limit assembly to release the limit on the sleeve 10. The partition limit assembly limits the partition 12, and the gas mixed with dust in the dryer 1 enters the filter chamber 6 through the exhaust pipe 2. When the air pressure in the sleeve 10 is greater than the force of the torsion spring, the scraper 9, the push rod 11 and the sleeve 10 move backward, and the filter element 8 at the front end is exposed. After being filtered by the filter element 8, the exhaust gas enters the drainage pipe 4 and is discharged through the fan 5. When the filter element 8 at the front end is blocked, the sleeve 10 moves backward again under the action of air pressure, exposing a section of the filter element 8 again to continue filtering the exhaust gas. When the dryer 1 stops drying, the fan 5 also stops. The sleeve 10 drives the partition limit assembly to move forward under the action of the coil spring 13. The partition 12 is released from the limit and pushes the sleeve 10 forward under the action of elastic force. The sleeve 10 and the scraper 9 are subjected to the combined force of the coil spring 13 and the partition 12, and can move forward quickly and return to their original position. The scraper 9 can scrape off the dust blocked on the filter element 8, thereby realizing self-cleaning of the filter element 8 and reducing the inconvenience of manual disassembly of the filter element 8.

[0048] Specifically, Figure 1 , Figure 2 , Figure 5 As shown, the sleeve limit assembly includes a sleeve limit block 14 elastically connected to the inner wall of the energy storage chamber 7, and a connecting rod 15 connected to the sleeve limit block 14, and the connecting rod 15 is slidably connected to the inner wall of the energy storage chamber 7; the sleeve limit block 14 is provided with an inclined groove 16, one end of the connecting rod 15 is provided with a connecting hole 17 that can be clamped in the inclined groove 16 to drive the sleeve limit block 14 to move, and the other end of the connecting rod 15 is vertically provided with a connecting plate 18, and the connecting plate 18 can contact the partition 12. The partition 12 moves backward under the action of negative pressure. When the partition 12 moves backward to contact the connecting plate 18, it drives the connecting rod 15 to move backward, and the connecting hole 17 is clamped in the inclined groove 16, driving the sleeve limit block 14 to move in the direction away from the sleeve 10, and the sleeve 10 is released from the limit. When the dryer 1 is stopped, the sleeve 10 moves forward, the partition limit assembly releases the limit on the partition 12, the partition 12 moves forward and disengages from the connecting plate 18, and when the sleeve 10 is reset, the sleeve limit block 14 limits the sleeve 10 again under the action of elastic force.

[0049] Specifically, Figure 6-Figure 9 As shown, the partition limit assembly includes a stopper 19 elastically connected to one end of the sleeve 10 extending into the energy storage chamber 7, a top block 20 arranged on the partition 12 and capable of pushing the stopper 19 to move, a partition limiter 21 elastically connected to the bottom of the energy storage chamber 7, and a rack 22 slidably connected to the bottom of the energy storage chamber 7 and capable of contacting the stopper 19, and one end of the rack 22 is connected to the partition limiter 21. Both sides of the partition limiter 21 are provided with a second inclined groove 23, one end of the rack 22 is provided with a clamping groove, and both sides of the clamping groove are provided with a connecting column 24 that can be clamped in the second inclined groove 23 and drive the partition limiter 21 to move.

[0050] In this embodiment, the elastic connections are all spring connections, and of course, they can also be designed as other feasible connection methods. In the initial position, the sleeve limit block 14 limits the sleeve 10, and the top block 20 supports the stopper 19. When the partition 12 moves backward under negative pressure, the top block 20 and the stopper 19 are separated, and the stopper 19 and the rack 22 are in conflict. When the partition 12 moves to the rear of the partition limit block 21, the partition limit block 21 bounces up under the action of elastic force and limits the partition 12. At this time, the partition 12 drives the connecting plate 18 to move, so that the sleeve limit block 14 releases the limit on the sleeve 10. When the dryer 1 is stopped, the sleeve 10 moves forward, the stopper 19 drives the rack 22 to move forward, and the connecting column 24 drives the partition limit block 21 to descend through the inclined slot 23, releasing the limit on the partition 12, and the partition 12 moves forward under the action of elastic force. An inclined surface is provided on the end of the partition limit block 21 close to the rack 22, so that the partition 12 can pass through the partition limit block 21 during the backward movement. When the partition limit block 21 limits the partition 12, the end of the partition limit block 21 away from the rack 22 can limit the partition 12, so that the partition 12 cannot pass through the partition limit block 21.

[0051] As a preferred method of this embodiment, Figure 5-Figure 8 As shown, multiple sleeves 10 are arranged side by side, and two adjacent sleeves 10 are fixedly connected. The sleeve limit blocks 14 limit the sleeves 10 on both sides, and the stopper 19 is arranged at the end of the sleeve 10 located in the middle. In this embodiment, three sleeves 10 are arranged, and the filter element 8 is arranged in each sleeve 10 to improve the filtering efficiency of the gas. The sleeve limit blocks 14 on both sides of the energy storage chamber 7 limit the sleeve 10. When the sleeve 10 moves forward, the stopper 19 drives the rack 22 to move.

[0052] As a preferred method of this embodiment, Figure 5-Figure 9 As shown, the end of the sleeve 10 is fixedly connected to a connecting frame 25, the stopper 19 is arranged inside the connecting frame 25, the top of the stopper 19 is elastically connected to the connecting frame 25, the upper part of the stopper 19 is provided with an inclined plane 1 26, the lower part of the stopper 19 is provided with an inclined plane 27 that can drive the rack 22 to move, and the top block 20 is provided with an inclined plane 3 28 that can push the inclined plane 1 26 to move. The stopper 19 is vertically connected to the connecting frame 25, when the inclined plane 3 28 lifts the inclined plane 1 26, the inclined plane 27 is separated from the rack 22; when the inclined plane 3 28 is separated from the inclined plane 1 26, the inclined plane 27 contacts the rack 22, and can drive the rack 22 to move.

[0053] As a preferred method of this embodiment, Figure 3-Figure 4 As shown, an end of the sleeve 10 away from the energy storage chamber 7 is fixedly connected with a blow head 29, and an air hole is provided on the blow head 29. The blow head 29 is an annular structure, and the gas generated by the sleeve 10 during the movement is blown out from the air hole of the blow head 29 to the filter element 8, thereby increasing the cleaning effect of the scraper 9 on the filter element 8.

[0054] As a preferred method of this embodiment, Figure 2 and Figure 7 As shown, a spring pull rod 30 is connected between the partition 12 and the energy storage chamber 7. The spring pull rod 30 guides the movement of the partition 12. At the same time, when the fan 5 is stopped, the partition 12 can be pushed to move under the action of elastic force.

[0055] As a preferred method of this embodiment, Figure 1 , Figure 2 , Figure 4 , Figure 7 As shown, a guide cover 31 is connected between the filter chamber 6 and the exhaust pipe 2, an exhaust chamber 32 is provided at one end of the filter chamber 6 near the guide cover 31, the filter element 8 is connected to the exhaust chamber 32, a dust box 33 is provided below the exhaust chamber 32, and a push plate 34 capable of pushing dust into the dust box 33 is provided on the push rod 11. An air outlet connected to the filter element 8 is provided in the exhaust chamber 32, and the gas generated by the dryer 1 enters the exhaust pipe 2, enters the exhaust chamber 32 under the guidance of the guide cover 31, and then enters the filter element 8 for filtration, so as to prevent the gas from not passing through the filter element 8 and directly entering the filter chamber 6, which causes insufficient filtering effect. After the dryer 1 is stopped, the sleeve 10 drives the scraper 9 and the push plate 34 to move forward quickly, the scraper 9 scrapes off the dust on the filter element 8, and the push plate 34 pushes the dust into the dust box 33.

[0056] As a preferred method of this embodiment, Figure 1-Figure 2 As shown, a return pipe 35 is sleeved on the exhaust pipe 2, one end of the return pipe 35 is fixedly connected to the exhaust port of the dryer 1, the other end of the return pipe 35 is fixedly connected to the guide cover 31, the end of the drainage pipe 4 is connected to the return pipe 35, and the fan 5 is arranged on the return pipe 35. Due to the temperature difference, condensation will occur in the pipe at the exhaust port, affecting the drying efficiency. In this embodiment, the exhaust gas generated by the dryer 1 is processed by the filtering mechanism, enters the drainage pipe 4, and then reaches the return pipe 35. The waste heat of the exhaust gas can heat the exhaust pipe 2, reduce the temperature difference at the exhaust pipe 2, and reduce the effect of condensation at the exhaust pipe 2 on the drying efficiency.

[0057] The method of using the present invention:

[0058] 1. When the dryer 1 is working, the fan 5 is started, and the exhaust gas in the dryer 1 enters the filter chamber 6 and the energy storage chamber 7 through the exhaust pipe 2, the guide cover 31, and the drainage pipe 4 in turn. Negative pressure is formed in the energy storage chamber 7, the partition 12 moves backward, the top block 20 and the stopper 19 are separated, and the stopper 19 and the rack 22 are in conflict. When the partition 12 moves to the rear of the partition limit block 21, the partition limit block 21 bounces up under the action of elastic force to limit the partition 12. At this time, the partition 12 drives the connecting plate 18 to move, drives the connecting rod 15 to move backward, and the connecting hole 17 is stuck in the inclined slot 16, driving the sleeve limit block 14 to move away from the sleeve 10, and the sleeve 10 is released from the limit;

[0059] 2. When the air pressure in the sleeve 10 is greater than the force of the coil spring 13, the scraper 9, the push rod 11 and the sleeve 10 move backward, and the filter element 8 at the front end is exposed. After the gas is filtered by the filter element 8, it enters the drainage pipe 4 and then reaches the return pipe 35. The waste heat of the exhaust gas can heat the exhaust pipe 2 and then be discharged by the fan 5;

[0060] 3. When the filter element 8 at the front end is blocked, the sleeve 10 moves backward again under the action of air pressure, exposing a section of the filter element 8 again to continue filtering the exhaust gas;

[0061] 4. When the dryer 1 stops drying, the fan 5 also stops, the sleeve 10 moves forward under the action of the coil spring 13, the block 19 drives the rack 22 to move forward, the connecting column 24 drives the partition limit block 21 to descend through the inclined slot 23, and the limit on the partition 12 is released. The partition 12 moves forward under the action of elastic force, pushing the sleeve 10 to move forward quickly, and the air hole of the air blowing head 29 blows air into the filter element 8. The scraper 9 can scrape off the dust blocked on the filter element 8, and the push plate 34 pushes the dust into the dust box 33;

[0062] 5. When the sleeve 10 moves to the initial position, the top block 20 lifts the stopper 19 , and the sleeve limit block 14 returns to its original position under the action of elastic force, thus limiting the position of the sleeve 10 .

[0063] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dust collecting and exhausting device for a dryer, comprising an exhaust pipe (2) connected to the dryer (1), a box (3), and a filtering mechanism; characterized in that: A drainage pipe (4) is provided above the box body (3), and a fan (5) is connected to the drainage pipe (4); a filter chamber (6) and an energy storage chamber (7) are provided in the box body (3), both of which are in communication with the drainage pipe (4); The filter mechanism comprises a filter element (8) disposed in a filter chamber (6) and communicating with an exhaust pipe (2), a scraper (9) slidably connected to the filter element (8) for cleaning dust, and a sleeve (10) slidably connected to the outside of the filter element (8); a push rod (11) is fixedly connected between the sleeve (10) and the scraper (9), and one end of the sleeve (10) extends into the energy storage chamber (7); A partition (12) that can move under negative pressure is elastically connected to the energy storage chamber (7). A sleeve limiting assembly that can limit the sleeve (10) and a partition limiting assembly that can limit the partition (12) are provided in the energy storage chamber (7). The limiting of the sleeve (10) by the sleeve limiting assembly can be released by the movement of the partition (12). The limiting of the partition (12) by the partition limiting assembly can be released by the reverse movement of the sleeve (10). A coil spring (13) that can drive the sleeve (10) to move is provided in the energy storage chamber (7); The sleeve limit assembly comprises a sleeve limit block (14) elastically connected to the inner wall of the energy storage chamber (7), and a connecting rod (15) connected to the sleeve limit block (14); the sleeve limit block (14) is provided with an inclined groove (16); one end of the connecting rod (15) is provided with a connecting hole (17) that can be locked in the inclined groove (16) to drive the sleeve limit block (14) to move; the other end of the connecting rod (15) is vertically provided with a connecting plate (18), and the connecting plate (18) can contact the partition plate (12); The partition plate limiting assembly comprises a stopper (19) elastically connected to one end of the sleeve (10) extending into the energy storage chamber (7), a top block (20) arranged on the partition plate (12) and capable of pushing the stopper (19) to move, a partition plate limiting block (21) elastically connected to the bottom of the energy storage chamber (7), and a rack (22) slidably connected to the bottom of the energy storage chamber (7) and capable of contacting the stopper (19), wherein one end of the rack (22) is connected to the partition plate limiting block (21); Two oblique grooves (23) are provided on both sides of the partition plate limit block (21); a clamping groove is provided at one end of the rack (22); and connecting columns (24) are provided on both sides of the clamping groove that can be clamped in the two oblique grooves (23) to drive the partition plate limit block (21) to move; A spring pull rod (30) is connected between the partition plate (12) and the energy storage chamber (7).

2. The dust collecting and exhausting device of the dryer according to claim 1, characterized in that: A plurality of sleeves (10) are arranged side by side, and two adjacent sleeves (10) are fixedly connected. The sleeve limit blocks (14) limit the sleeves (10) on both sides, and the stop blocks (19) are arranged at the ends of the sleeves (10) located in the middle.

3. The dust collecting and exhausting device of the dryer according to claim 2, characterized in that: The end of the sleeve (10) is fixedly connected to a connecting frame (25), a stopper (19) is arranged inside the connecting frame (25), a top end of the stopper (19) is elastically connected to the connecting frame (25), an upper portion of the stopper (19) is provided with an inclined surface 1 (26), a lower portion of the stopper (19) is provided with an inclined surface 2 (27) capable of driving the rack (22) to move, and a top block (20) is provided with an inclined surface 3 (28) capable of driving the inclined surface 1 (26) to move.

4. The dust collecting and exhausting device of the dryer according to claim 3, characterized in that: An air blowing head (29) is fixedly connected to one end of the sleeve (10) away from the energy storage chamber (7), and an air hole is provided on the air blowing head (29).

5. The dust collecting and exhausting device of the dryer according to claim 4, characterized in that: A flow guide cover (31) is connected between the filter chamber (6) and the exhaust pipe (2); an exhaust chamber (32) is provided at one end of the filter chamber (6) close to the flow guide cover (31); the filter element (8) is in communication with the exhaust chamber (32); a dust collection box (33) is provided below the exhaust chamber (32); and a push plate (34) is provided on the push rod (11) for pushing dust into the dust collection box (33).

6. The dust collecting and exhausting device of the dryer according to claim 5, characterized in that: A return pipe (35) is sleeved on the exhaust pipe (2); one end of the return pipe (35) is fixedly connected to the exhaust port of the dryer (1); the other end of the return pipe (35) is fixedly connected to the air guide cover (31); the end of the drainage pipe (4) is connected to the return pipe (35); and the fan (5) is arranged on the return pipe (35).

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