Drying machine air duct structure

Abstract

The application discloses a dryer air duct structure, relates to the field of dryer technology, and comprises a dryer body, the dryer body comprising a rack, a drum, a driving device and a heating device, the drum is arranged along the transverse direction and rotationally connected to the inside of the rack, the driving device is located on one side of the rack along the transverse direction, the driving device is used for driving the drum to rotate, one side of the drum away from the driving device is provided with a blocking door, the upper end of the rack is provided with a heating port, the heating device is located on the upper end of the rack and opposite to the heating port, the lower end of the rack is communicated with a fan on the side close to the driving device, the upper end of the rack is fixedly provided with a ventilation cover, the heating device is located in the ventilation cover, the side of the rack away from the driving device is fixedly provided with a connecting block, the connecting block is matched with the rack, the connecting block is hollow, the upper end of the connecting block is provided with an air inlet, and the lower end of the connecting block is provided with two air inlets communicated with the rack. The application has the effect of improving the drying efficiency of the dryer.

Description

Technical Field

[0001] This application relates to the field of dryer technology, and in particular to a dryer duct structure. Background Technology

[0002] Currently, dryers generate dry hot air by heating air (gas combustion or electric heating), and the hot air is driven by a fan through a rotating drum to evaporate the moisture in the clothes. At the same time, the moisture is discharged through the exhaust system (or partially recycled).

[0003] Related technology can be found in Chinese patent application CN119826509A, which discloses an industrial dryer. This dryer, belonging to the field of dryers, includes a heat source, a dryer body, an exhaust fan, and a heating chamber. The heating chamber is located vertically above the dryer body. An exhaust fan is installed on the outer surface of the dryer body, drawing hot air generated by the heat source into the dryer body. The heat source, a metal fiber burner, is installed inside the heating chamber. This application features a large and stable combustion chamber from the metal fiber burner, effective guidance of the hot air by the exhaust fan in conjunction with the heating chamber, high drying efficiency, and no damage to the dried object.

[0004] Regarding the aforementioned technologies, the air inlet of the dryer is located at the bottom of the dryer. During operation, the cold air has a high natural density, and the heated air is concentrated at the top of the dryer, which can easily lead to temperature stratification inside the dryer. Bottom air intake can cause dust near the bottom to be sucked into the dryer and clog the surface of the drum, resulting in low drying efficiency of the dryer. Utility Model Content

[0005] In order to improve the drying efficiency of the dryer, this application provides a dryer air duct structure.

[0006] This application provides a dryer air duct structure, which adopts the following technical solution: A dryer duct structure includes a dryer body, which includes a frame, a drum, a drive unit, and a heating unit. The drum is arranged laterally and rotatably connected to the inside of the frame. The drive unit is located on one side of the frame along the lateral direction and is used to drive the drum to rotate. A sealing door is provided on the side of the drum away from the drive unit. A heating port is opened at the upper end of the frame, and the heating unit is located at the upper end of the frame and faces the heating port. A fan is connected to the side of the lower end of the frame near the drive unit. A vent is fixed at the upper end of the frame, and the heating unit is located inside the vent. A connecting block is fixed on the side of the frame away from the drive unit. The connecting block is adapted to the frame and is hollow. An air inlet is opened at the upper end of the connecting block, and two air inlets connected to the frame are opened at the lower end of the connecting block.

[0007] By adopting the above technical solution, the frame supports the drum, the drive device drives the drum to rotate, the sealing door seals the drum, and the air inside the frame enters the heating device through the heating port. The heating device heats the air and delivers it to the inside of the drum. When the heating device is working, the air enters the ventilation hood, thus supplying oxygen to the heating device. External air enters the connecting block through the air inlet and enters the frame, thus replenishing the frame with sufficient air. During the heating process, air enters the connecting block from the upper end, which helps reduce the probability of impurities such as lint from the ground entering the frame. The fan is used to extract the hot and humid air from the frame, improving the drying efficiency of the dryer.

[0008] Optionally, two air guide plates are fixed vertically inside the connecting block. The two air guide plates are located on the side where the two air inlets are close to each other. Two first filters are fixed inside the frame. The first filters correspond one-to-one with the air inlets and are directly opposite the air inlets. The first filters are inclined from top to bottom along the direction of the connecting block pointing towards the frame.

[0009] By adopting the above technical solution, the air guide plate guides the air entering the connecting block, causing the air to move vertically, and the first filter screen adsorbs dust and other impurities in the air, improving the convenience of dust cleaning inside the frame.

[0010] Optionally, a cleaning box is provided inside the frame. The cleaning box is located between two first filter screens. The side of the cleaning box away from the drive unit is located on the outside of the frame and is slidably connected to the frame in the lateral direction. The cleaning box is directly opposite the fan. The side of the cleaning box near the fan and the two sides near the first filter screen are both filter plates.

[0011] By adopting the above technical solution, during the rotation of the drum, the lint on the clothes falls into the cleaning box. The fan draws air from the inside of the frame, causing the lint in the cleaning box to adhere to the filter plate. When there is a lot of lint in the cleaning box, the cleaning box is pulled to separate it from the frame, and the lint on the filter plate is processed, which improves the convenience of lint cleaning during the drying process.

[0012] Optionally, the heating device includes a heating chamber, several burners, a reflux chamber, a guide plate, a second filter screen, and a conveyor. The reflux chamber and the heating chamber are both fixedly connected to the upper end of the frame and face the heating port. Several burners are fixedly connected to the upper end of the frame and are located on both sides of the reflux chamber along the longitudinal direction. The second filter screen is fixedly connected to the upper end of the reflux chamber. The guide plate is fixedly connected inside the heating chamber. The burners and the reflux chamber are both located inside the guide plate. The heating chamber is located inside the vent hood. The side of the reflux chamber near the connecting block is connected to the heating chamber. The conveyor is located at the upper end of the frame. One end of the conveyor is connected to the vent hood, and the other end of the conveyor is connected to the side of the roller near the connecting block. The heating chamber has several air inlets along the circumference.

[0013] By adopting the above technical solution, during the heating process, the air in the ventilation hood passes through the air inlet and enters the heating chamber, providing air for the heating chamber. This helps reduce the probability of the heating chamber exploding due to thermal expansion. The burner heats the air in the heating chamber, and the heated air passes through the second filter under the guidance of the baffle plate and enters the return chamber. The hot air in the return chamber is transported to the inside of the drum through the conveyor, thereby drying the clothes inside the drum. The burner heats the air on both sides of the frame along the longitudinal direction, so that the air entering the return chamber has a uniform temperature, which improves the drying efficiency.

[0014] Optionally, the conveying component includes an air supply chamber and an air guide chamber. The air supply chamber is fixedly connected to the upper end of the frame and located between the ventilation hood and the connecting block. The side of the air supply chamber closest to the ventilation hood is connected to the ventilation hood. The air guide chamber is fixedly connected vertically inside the connecting block. The upper end of the air guide chamber is connected to the air supply chamber. The lower end of the air guide chamber passes through the connecting block and faces the roller. A protective component is provided on the side of the air guide chamber away from the frame. The protective component is connected to the sealing door.

[0015] By adopting the above technical solution, the hot air in the return chamber passes through the ventilation hood and enters the air conveying chamber. The hot air then enters the air guide chamber through the air conveying chamber. The hot air moves along the inside of the air guide chamber and is conveyed to the inside of the roller. Because the hot air temperature is high, the temperature of the air guide chamber rises. The protective component isolates the temperature of the air guide chamber, improving the convenience of hot air conveying.

[0016] Optionally, the lower end of the air chamber is inclined, with the lower end of the air chamber inclined from bottom to top along the direction from the connecting block towards the frame.

[0017] By adopting the above technical solution, the lower end of the air guide chamber is inclined, so that the hot air entering the drum is first located above the drum and sinks, which helps to reduce the probability of temperature stratification inside the drum and improves the drying efficiency.

[0018] Optionally, the protective component includes a heat insulation plate, which is arranged vertically. The upper end of the heat insulation plate is vertically hinged to the side of the air duct away from the frame. A gap is left between the heat insulation plate and the air duct. The lower end of the heat insulation plate is fixedly connected to the sealing door. A driving component is provided on one side of the air duct along the longitudinal direction. The driving component is used to drive the heat insulation plate to rotate.

[0019] By adopting the above technical solution, the heat insulation plate isolates the temperature of the air guide chamber, and the driving component drives the heat insulation plate to rotate, which in turn drives the sealing door to rotate. There is no need for manual opening of the sealing door, which helps to reduce the probability of burns to operators and improves the safety of the dryer operation.

[0020] Optionally, a cold air inlet is longitudinally opened at the upper end of the air guide chamber. A cover plate is provided at the upper end of the air guide chamber to block the cold air inlet. The end of the cover plate near the air delivery chamber is hinged to the air delivery chamber. A telescopic cylinder is fixed vertically on the side of the air guide chamber away from the driving component. A slider is provided at the lower end of the cover plate near the telescopic cylinder. The slider is slidably connected to the cover plate along the width direction of the cover plate. The output end of the telescopic cylinder is vertically hinged to the lower end of the slider.

[0021] By adopting the above technical solution, when the dryer body has finished working and the inside of the frame needs to be cooled, the cylinder pushes the slider to slide along the lower end of the cover plate, thereby lifting the cover plate. Air passes through the cold air inlet into the air guide chamber and then flows into the drum, improving the convenience of cooling the inside of the frame.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. When the dryer body dries clothes, air enters the ventilation hood and supplies oxygen to the heating device. External air enters the connecting block through the air inlet and enters the frame, thus replenishing the frame with sufficient air. During the heating process, air enters the connecting block from the upper end, which helps reduce the probability of impurities such as lint from the ground entering the frame and improves the drying efficiency of the dryer. 2. The hot air in the return chamber passes through the ventilation hood and the air conveying chamber in sequence and enters the air guide chamber. The hot air moves along the inside of the air guide chamber and is delivered to the inside of the drum. The lower end of the air guide chamber is inclined so that the hot air entering the drum is first located above the drum and sinks down, which helps to reduce the probability of temperature stratification inside the drum and improves the drying efficiency. 3. During the rotation of the drum, lint from the clothes falls into the cleaning box. The fan draws air from inside the frame, causing the lint in the cleaning box to adhere to the filter plate. When there is a lot of lint in the cleaning box, the cleaning box is pulled to separate it from the frame and the lint on the filter plate is removed, improving the convenience of lint removal during the drying process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a dryer's air duct.

[0024] Figure 2 This is a schematic diagram designed to highlight the internal structure of the rack.

[0025] Figure 3 This is a schematic diagram designed to highlight the internal structure of the heating chamber.

[0026] Figure 4 This is a schematic diagram designed to highlight the positional relationship between the conveyor and the frame.

[0027] Figure 5 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Dryer body; 11. Frame; 12. Drum; 13. Drive unit; 14. Fan; 15. Ventilation hood; 16. Connecting block; 161. Air inlet; 162. Air inlet; 163. Air guide plate; 17. Cleaning box; 171. Filter plate; 18. Sealing door; 2. Heating device; 21. Heating chamber; 211. Air inlet; 22. Burner; 23. Return chamber; 24. Second filter screen; 25. Conveying component; 251. Air supply chamber; 252. Air guiding chamber; 26. Guide plate; 3. First filter screen; 4. Protective component; 41. Heat insulation plate; 42. Drive unit; 51. Cover plate; 52. Sliding block; 53. Cylinder; 54. Cold air outlet. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] This application discloses a dryer air duct structure. Example

[0031] Reference Figure 1 and Figure 2 A dryer duct structure includes a dryer body 1, which includes a frame 11, a drum 12, a drive unit 13, and a heating unit 2. The drum 12 is arranged laterally and rotatably connected inside the frame 11. The drive unit 13 is located on one side of the frame 11 along the lateral direction. The frame 11 supports the drum 12, and the drive unit 13 drives the drum 12 to rotate within the frame 11. A sealing door 18 is provided on the side of the drum 12 away from the drive unit 13, and the sealing door 18 seals the drum 12.

[0032] Reference Figure 1 and Figure 2 A connecting block 16 is fixed on the side of the frame 11 away from the drive device 13. The connecting block 16 is adapted to the frame 11. The connecting block 16 is hollow. An air inlet 161 is opened at the upper end of the connecting block 16. Two air inlets 162 connected to the frame 11 are opened at the lower end of the connecting block 16. Air enters the interior of the connecting block 16 through the air inlet 161. The air continues to move and enters the interior of the frame 11 through the air inlet 162, thereby replenishing the air inside the frame 11. The air enters the interior of the connecting block 16 from the upper end, which helps to reduce the probability of impurities such as lint from the ground entering the interior of the frame 11.

[0033] Reference Figure 1 and Figure 2Two air guide plates 163 are vertically fixed inside the connecting block 16. These plates are located on the side where the two air inlets 162 are close together. The air guide plates 163 guide the air entering the connecting block 16, causing it to move vertically. Two first filters 3 are fixed inside the frame 11. Each first filter 3 corresponds to and faces one of the air inlets 162. The first filters 3 adsorb dust and other impurities in the air. The first filters 3 are inclined from top to bottom along the direction from the connecting block 16 towards the frame 11. The lower end of the first filter 3 is in contact with the frame 11. This inclined arrangement allows for better contact between the air and the first filters, reducing the probability of dust accumulation inside the frame 11 and improving the ease of cleaning the frame 11.

[0034] Reference Figure 1 and Figure 2 A heating port is provided at the upper end of the frame 11. The heating device 2 is located at the upper end of the frame 11 and faces the heating port. Air inside the frame 11 enters the heating device 2 through the heating port, heats the air, and then delivers it into the drum 12. A vent 15 is fixed at the upper end of the frame 11, and the heating device 2 is located inside the vent 15. When the heating device 2 is working, air enters the vent 15, thereby supplying oxygen to the heating device 2 and improving the stability of its operation.

[0035] Reference Figure 3 The heating device 2 includes a heating chamber 21, multiple burners 22, a return chamber 23, a guide plate 26, a second filter screen 24, and a conveyor 25. Both the return chamber 23 and the heating chamber 21 are fixedly connected to the upper end of the frame 11 and face the heating port. The heating chamber 21 has multiple air inlets 211 circumferentially open. During heating, air from the ventilation hood 15 passes through the air inlets 211 and enters the heating chamber 21, providing oxygen to the interior. Multiple burners 22 are fixedly connected to the upper end of the frame 11 and are located on both sides of the return chamber 23 along its longitudinal direction. The burners 22 heat the air on both sides of the frame 11 along its longitudinal direction, ensuring a uniform temperature of the air entering the return chamber 23.

[0036] Reference Figure 3 The second filter 24 is fixedly connected to the upper end of the return chamber 23, and the guide plate 26 is fixedly connected to the inside of the heating chamber 21. The burner 22 and the return chamber 23 are both located inside the guide plate 26, and the heating chamber 21 is located inside the ventilation hood 15. The heated air passes through the second filter 24 and enters the return chamber 23 under the guidance of the guide plate 26. The second filter 24 adsorbs dust in the hot air.

[0037] Reference Figure 3The side of the return chamber 23 near the connecting block 16 is connected to the heating chamber 21. The conveyor 25 is located at the upper end of the frame 11. One end of the conveyor 25 is connected to the ventilation hood 15, and the other end of the conveyor 25 is connected to the side of the drum 12 away from the drive device 13. The hot air in the return chamber 23 is conveyed to the inside of the drum 12 through the conveyor 25, thereby drying the clothes inside the drum 12.

[0038] Reference Figure 4 The conveying component 25 includes an air supply chamber 251 and an air guide chamber 252. The air supply chamber 251 is fixedly connected to the upper end of the frame 11 and located on the side of the ventilation hood 15 away from the drive device 13. The side of the air supply chamber 251 closest to the ventilation hood 15 is connected to the ventilation hood 15. Hot air in the return chamber 23 passes through the ventilation hood 15 and enters the air supply chamber 251. The air guide chamber 252 is fixedly connected vertically inside the connecting block 16. The upper end of the air guide chamber 252 is connected to the air supply chamber 251, and the lower end of the air guide chamber 252 passes through the connecting block 16 and faces the roller 12. Hot air enters the air guide chamber 252 through the air supply chamber 251, moves along the inside of the air guide chamber 252, and is conveyed to the inside of the roller 12.

[0039] Reference Figure 4 The lower end of the air guide chamber 252 is inclined, and the lower end of the air guide chamber 252 is inclined from bottom to top along the direction of the connecting block 16 pointing to the frame 11. The inclined lower end of the air guide chamber 252 makes the hot air entering the drum 12 first located above the drum 12 and sinking, which helps to reduce the probability of temperature stratification inside the drum 12 and improves the drying efficiency.

[0040] Reference Figure 4 A protective component 4 is provided on the side of the air duct 252 away from the frame 11. The protective component 4 is connected to the sealing door 18. Due to the high temperature of the hot air, the temperature of the air duct 252 rises. The protective component 4 is used to insulate the air duct 252 from the temperature. The protective component 4 includes a heat insulation plate 41, which is set vertically. The upper end of the heat insulation plate 41 is vertically hinged to the side of the air duct 252 away from the frame 11. A gap is left between the heat insulation plate 41 and the air duct 252. The lower end of the heat insulation plate 41 is fixedly connected to the sealing door 18. A driving component 42 is provided on the longitudinal side of the air duct 252. The driving component 42 is a combination of a cylinder 53 and a rotating rod. The heat insulation plate 41 insulates the temperature of the air duct 252. The driving component 42 drives the heat insulation plate 41 to rotate, which in turn drives the sealing door 18 to rotate. There is no need to manually open the sealing door 18, which helps to reduce the probability of burns to the operator.

[0041] Reference Figure 5The upper end of the air guide chamber 252 has a cold air inlet 54 opened longitudinally. The upper end of the air guide chamber 252 is provided with a cover plate 51. The end of the cover plate 51 near the air conveying chamber 251 is hinged to the air conveying chamber 251. The side of the air guide chamber 252 away from the driving component 42 is fixed vertically with a telescopic cylinder 53. The lower end of the cover plate 51 near the telescopic cylinder 53 is provided with a slider 52. The slider 52 is slidably connected to the cover plate 51 along the width direction of the cover plate 51. The output end of the telescopic cylinder 53 is vertically hinged to the lower end of the slider 52. When the dryer body 1 has finished working and it is necessary to cool the inside of the frame 11, the cylinder 53 pushes the slider 52 to slide along the lower end of the cover plate 51, thereby lifting the cover plate 51. Air passes through the cold air inlet 54 and enters the air guide chamber 252, and then flows into the drum 12, which improves the convenience of cooling the inside of the frame 11.

[0042] Reference Figure 1 and Figure 2 A fan 14 is connected to the lower end of the frame 11 near the drive unit 13. The fan 14 is used to extract hot and humid air from inside the frame 11. A cleaning box 17 is provided inside the frame 11. The cleaning box 17 is located between two first filters 3 and is directly opposite the fan 14. The side of the cleaning box 17 near the fan 14 and the two sides near the first filters 3 are filter plates 171. During the rotation of the roller 12, the lint on the clothes falls into the cleaning box 17. The fan 14 extracts air from inside the frame 11, so that the lint in the cleaning box 17 adheres to the filter plates 171.

[0043] Reference Figure 1 The cleaning box 17 is located on the outside of the frame 11 on the side away from the drive unit 13 and is slidably connected to the frame 11 in the lateral direction. When there is a lot of lint in the cleaning box 17, the cleaning box 17 is pulled to separate the cleaning box 17 from the frame 11 and the lint on the filter plate 171 is treated.

[0044] The implementation principle of the air duct structure of the dryer in this embodiment is as follows: When the dryer is working, external air enters the connecting block 16 through the air inlet 161, passes through the air inlet 162 and enters the frame 11. The air in the frame 11 passes through the heating port and enters the heating chamber 21. The air in the ventilation hood 15 passes through the air inlet 211 and enters the heating chamber 21. The burner 22 heats the air in the heating chamber 21. The heated air passes through the second filter screen 24 under the action of the guide plate 26 and enters the return chamber 23. The hot air in the return chamber 23 passes through the ventilation hood 15 and the air conveying chamber 251 in sequence and enters the air guide chamber 252. The hot air flows along the air guide chamber 252. The air is moved and conveyed into the drum 12. The lower end of the air guide chamber 252 is inclined so that the hot air entering the drum 12 is first located above the drum 12 and sinks, which helps to reduce the probability of temperature stratification inside the drum 12. When the dryer body 1 has finished working and it is necessary to cool the inside of the frame 11, the cylinder 53 pushes the slider 52 to slide along the lower end of the cover plate 51, thereby lifting the cover plate 51. The air passes through the cold air inlet 54 and enters the air guide chamber 252, and then flows into the drum 12, thereby cooling the inside of the frame 11 and bringing the inside of the frame 11 to room temperature. The clothes in the drum 12 are then taken out, so as to carry out the next drying operation, which improves the drying efficiency of the dryer.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dryer air duct structure, comprising a dryer body (1), characterized in that: The dryer body (1) includes a frame (11), a drum (12), a drive device (13), and a heating device (2). The drum (12) is arranged laterally and rotatably connected inside the frame (11). The drive device (13) is located on one side of the frame (11) along the lateral direction. The drive device (13) is used to drive the drum (12) to rotate. A sealing door (18) is provided on the side of the drum (12) away from the drive device (13). A heating port is opened at the upper end of the frame (11). The heating device (2) is located at the upper end of the frame (11) and faces the heating port. A fan (14) is connected to the side of the lower end of the frame (11) near the drive device (13). A vent hood (15) is fixed to the upper end of the frame (11). The heating device (2) is located inside the vent hood (15). A connecting block (16) is fixed to the side of the frame (11) away from the drive device (13). The connecting block (16) is adapted to the frame (11). The connecting block (16) is hollow. An air inlet (161) is opened at the upper end of the connecting block (16). Two air inlets (162) connected to the frame (11) are opened at the lower end of the connecting block (16).

2. The air duct structure for a dryer according to claim 1, characterized in that: Two air guide plates (163) are fixedly installed vertically inside the connecting block (16). The two air guide plates (163) are located on the side close to the two air inlets (162). Two first filters (3) are fixedly installed inside the frame (11). The first filters (3) correspond one-to-one with the air inlets (162) and are directly opposite the air inlets (162). The first filters (3) are inclined from top to bottom along the direction from the connecting block (16) to the frame (11).

3. The air duct structure for a dryer according to claim 2, characterized in that: The frame (11) is equipped with a cleaning box (17), which is located between two first filter screens (3). The side of the cleaning box (17) away from the drive device (13) is located outside the frame (11) and is slidably connected to the frame (11) in the lateral direction. The cleaning box (17) is directly opposite the fan (14). The side of the cleaning box (17) near the fan (14) and the two sides near the first filter screens (3) are both filter plates (171).

4. The air duct structure of a dryer according to claim 1, characterized in that: The heating device (2) includes a heating chamber (21), several burners (22), a return chamber (23), a guide plate (26), a second filter screen (24), and a conveyor (25). The return chamber (23) and the heating chamber (21) are both fixedly connected to the upper end of the frame (11) and face the heating port. Several burners (22) are fixedly connected to the upper end of the frame (11) and are located on both sides of the return chamber (23) along the longitudinal direction. The second filter screen (24) is fixedly connected to the upper end of the return chamber (23), and the guide plate (26) is fixedly connected to the heating chamber. Inside (21), the burner (22) and the return chamber (23) are both located inside the guide plate (26), the heating chamber (21) is located inside the vent hood (15), the side of the return chamber (23) near the connecting block (16) is connected to the heating chamber (21), the conveyor (25) is located at the upper end of the frame (11), one end of the conveyor (25) is connected to the vent hood (15), and the other end of the conveyor (25) is connected to the side of the roller (12) near the connecting block (16). The heating chamber (21) has several air inlets (211) circumferentially open.

5. The air duct structure of a dryer according to claim 4, characterized in that: The conveying component (25) includes an air supply chamber (251) and an air guide chamber (252). The air supply chamber (251) is fixedly connected to the upper end of the frame (11) and located between the ventilation hood (15) and the connecting block (16). The side of the air supply chamber (251) closest to the ventilation hood (15) is connected to the ventilation hood (15). The air guide chamber (252) is fixedly connected vertically inside the connecting block (16). The upper end of the air guide chamber (252) is connected to the air supply chamber (251). The lower end of the air guide chamber (252) passes through the connecting block (16) and is directly opposite the roller (12). The side of the air guide chamber (252) away from the frame (11) is provided with a protective component (4). The protective component (4) is connected to the sealing door (18).

6. The air duct structure of a dryer according to claim 5, characterized in that: The lower end of the air guide chamber (252) is inclined, and the lower end of the air guide chamber (252) is inclined from bottom to top along the direction from the connecting block (16) to the frame (11).

7. The air duct structure for a dryer according to claim 5, characterized in that: The protective component (4) includes a heat insulation plate (41), which is arranged vertically. The upper end of the heat insulation plate (41) is vertically hinged to the side of the air guide chamber (252) away from the frame (11). There is a gap between the heat insulation plate (41) and the air guide chamber (252). The lower end of the heat insulation plate (41) is fixedly connected to the sealing door (18). A driving component (42) is provided on one side of the air guide chamber (252) along the longitudinal direction. The driving component (42) is used to drive the heat insulation plate (41) to rotate.

8. The air duct structure of a dryer according to claim 7, characterized in that: The upper end of the air guide chamber (252) has a cold air inlet (54) opened longitudinally. The upper end of the air guide chamber (252) is provided with a cover plate (51) which blocks the cold air inlet (54). The end of the cover plate (51) near the air delivery chamber (251) is hinged to the air delivery chamber (251). The side of the air guide chamber (252) away from the driving component (42) is fixed with a telescopic cylinder (53) in the vertical direction. The lower end of the cover plate (51) near the telescopic cylinder (53) is provided with a slider (52). The slider (52) is slidably connected to the cover plate (51) along the width direction of the cover plate (51). The output end of the telescopic cylinder (53) is hinged to the lower end of the slider (52) in the vertical direction.

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