Unit type ultraviolet air purifier cleaning structure

Abstract

The utility model relates to the field of air purifiers, in particular to a unit type ultraviolet air purifier cleaning structure. The technical problems that cleaning brushes arranged on the two sides of a filter plate are adopted for cleaning the filter plate, during cleaning, the filter plate can be cleaned only after the air purifier is stopped, and the filter plate is inconvenient to use for places where air needs to be purified for a long time; according to the technical scheme, the unit type ultraviolet air purifier cleaning structure comprises a sealing assembly, a lifting assembly and a cleaning assembly; compared with the prior art that cleaning brushes arranged on the two sides of a filter plate are adopted to clean the filter plate, the air purifier needs to be stopped to clean the filter plate during cleaning, and the air purifier is inconvenient to use for places where air needs to be purified for a long time; according to the filtering structure, through cooperation of the sealing structure and the cleaning structure, the filtering plates can be cleaned in a segmented mode, and therefore when the air purifier works, the filtering plates can be cleaned, shutdown cleaning is not needed, and using is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of air purifiers, in particular to a unit-type ultraviolet air purifier cleaning structure. Background Art

[0002] An ultraviolet air purifier is a device used to purify the air; it uses ultraviolet radiation to remove bacteria, viruses and other microorganisms in the air; the ultraviolet air purifier uses non-pathogenic ultraviolet radiation during operation, which ensures that it has no negative impact on human health; the ultraviolet air purifier is an efficient air purification tool that can effectively eliminate harmful substances in the air; in addition to killing microorganisms, it can also remove odors, smoke and other pollutants in the air; ultraviolet air purifiers are usually used in hospitals, laboratories and other environments where the air needs to be kept clean; when cleaning the filter plate of the air purifier, the filter plate is cleaned with a cleaning brush set on both sides of the filter plate. When cleaning, the air purifier needs to be stopped before cleaning, which is inconvenient to use in places where air purification needs to be carried out for a long time. Utility Model Content

[0003] In order to overcome the problem that when cleaning the filter plate of the air purifier, the filter plate is cleaned with cleaning brushes arranged on both sides of the filter plate, the air purifier needs to be stopped before cleaning, which is inconvenient to use in places where air purification is required for a long time.

[0004] The technical solution of the utility model is: a unit-type ultraviolet air purifier cleaning structure, including a purifier shell, a filter plate, a sealing component, a lifting component, a cleaning component, a water spray component, a drainage component and a drying component, the filter plate is arranged in two groups, the filter plate is arranged inside the purifier shell, the sealing component is arranged inside the purifier shell, the sealing component is abutted and connected with the filter plate, the lifting component is arranged inside the purifier shell, the cleaning component is connected with the lifting component, the water spray component is arranged inside the cleaning component, the drainage component is arranged on the bottom surface of the purifier shell, and the drying component is arranged inside the cleaning component.

[0005] Preferably, by providing a purifier shell, the internal structure of the air purifier and the sealing component, lifting component, cleaning component, water spray component, drainage component and drying component can be installed; by providing a filter plate, the filtering function of the air purifier can be realized; by providing a sealing component, the filter plate can be sealed to prevent dust and sewage from being scattered during cleaning; by providing a lifting component, the cleaning component can be driven to be lifted and lowered; by providing a cleaning component, the filter plate can be cleaned; by providing a water spray component, water can be sprayed when cleaning the filter plate to increase the cleaning effect; by providing a drainage component, sewage generated during cleaning can be discharged; and by providing a drying component, the filter plate can be dried.

[0006] Preferably, the sealing assembly includes a fixed plate, a sealing plate, a sealing motor and a sealing screw. The fixed plate is arranged inside the purifier shell, and the fixed plate is fixedly connected to the inner side wall of the purifier shell. The sealing plate is arranged in two groups, and the sealing plate is arranged on one side of the fixed plate. The sealing motor is arranged in multiple groups, and the sealing motor is arranged on the bottom surface of the purifier shell. The sealing screw is arranged in multiple groups, and the sealing screw is arranged inside the purifier shell. One end of the sealing screw is fixedly connected to the output end of the sealing motor, and the sealing plate is threadedly connected to the sealing screw. When in use, the two groups of filter plates can be separated by setting the fixed plate, and the sealing motor can be driven to rotate by setting the sealing screw. The sealing screw can be driven to lift and lower by setting the sealing screw, so as to achieve sealing of the two groups of filter plates, so that the filter plates can be cleaned when the air purifier is working, without stopping the machine for cleaning, and it is more convenient to use.

[0007] Preferably, the lifting assembly is set into two groups, and the two groups of lifting motors are respectively arranged above and below the fixed plate. The lifting assembly includes a lifting motor, a lifting screw and a limit rod. The lifting motor is set into two groups, one of the two lifting motors is set on the top surface of the purifier shell, and the other of the two lifting motors is set on the bottom surface of the purifier shell. The lifting screw is set into two groups, one end of the lifting screw is fixedly connected to the output end of the lifting motor, the limit rod is set inside the purifier shell, and the limit rod passes through the fixed plate. When in use, the lifting motor can be used to drive the lifting screw to rotate.

[0008] Preferably, the cleaning component includes an installation shell, a cleaning motor and a cleaning brush. The installation shell is arranged in two groups, the installation shell is sleeved on the filter plate, the installation shell is threadedly connected to the lifting screw, the installation shell is slidably connected to the limit rod, the cleaning motor is arranged in multiple groups, the cleaning motor is arranged on one side of the installation shell, the cleaning brush is arranged in multiple groups, the cleaning brush is arranged inside the installation shell, one end of the cleaning brush is fixedly connected to the output end of the cleaning motor, when in use, the cleaning motor and the cleaning brush can be installed by setting the installation shell, and when the lifting screw rotates, the installation shell can be driven to be lifted and lowered, and the cleaning motor can be driven to rotate by setting the cleaning brush, so that the filter plate can be cleaned when the installation shell drives the cleaning motor and the cleaning brush to be lifted and lowered.

[0009] Preferably, the water spray assembly includes a water tank, a connecting pipe, an electric valve, a pressure pump, a pressurizing box and a nozzle. The water tank is arranged on the top surface of the purifier shell, the connecting pipe is arranged in two groups, the connecting pipe is arranged in a retractable material, one end of the connecting pipe is connected to the water tank, the pressurizing box is arranged in two groups, the pressurizing box is arranged on one side of the installation shell, the other end of the connecting pipe is connected to the pressurizing box, the pressure pump is arranged on the connecting pipe, the electric valve is arranged on the connecting pipe, the nozzle is arranged in multiple groups, the nozzle is arranged on the inner side wall of the installation shell, and the nozzle is connected to the pressurizing box. When in use, clean water can be stored by arranging a water tank, the water tank can be connected to the pressurizing box by arranging a connecting pipe, and the electric valve and the pressure pump can be arranged to realize the orderly transportation of water inside the water tank to the inside of the two groups of installation shells, and the two groups of filter plates can be cleaned separately by spraying out with the nozzle.

[0010] Preferably, the drainage component includes a drainage trough and a drainage pipe. The drainage trough is arranged in two groups. The drainage trough is arranged below the two groups of filter plates. The drainage pipe is arranged on one side of the purifier shell. The drainage trough and the drainage pipe are through-connected. When in use, the sewage after cleaning the filter plate can be discharged into the drainage pipe by setting the drainage trough and discharged through the drainage pipe.

[0011] Preferably, the air-drying component includes an air-drying duct and a conveying fan. The air-drying duct is arranged in two groups. One end of the air-drying duct is arranged in the air outlet end of the purifier shell, and the other end of the air-drying duct is connected with the installation shell. The conveying fan is arranged on the air-drying duct. When in use, air can be conveyed to the inside of the installation shell by arranging the air-drying duct and the conveying fan, so that the filter plate can be dried. And by arranging one end of the air-drying duct in the air outlet of the air purifier, the filter plate can be disinfected and cleaned by the negative ions generated by the ultraviolet lamp when the filter plate is dried, ensuring that no bacteria and other harmful substances will remain on the filter plate, ensuring the cleanliness of the filter plate, thereby ensuring the normal operation and work of the air purifier.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the prior art, when cleaning the filter plate of the air purifier, the cleaning brushes arranged on both sides of the filter plate are used to clean the filter plate. When cleaning, the air purifier needs to be stopped before cleaning, which is inconvenient for places where air purification is required for a long time. The filter structure can clean the filter plate in sections by setting the cooperation of the sealing structure and the cleaning structure, so that the filter plate can be cleaned when the air purifier is working, without stopping the machine for cleaning, and is more convenient to use.

[0014] 2. The two groups of filter plates can be separated by setting a fixed plate, the sealing motor can be used to drive the sealing screw to rotate, and the sealing screw can be used to drive the sealing plate to rise and fall, so as to achieve the sealing of the two groups of filter plates. The filter plates can be cleaned when the air purifier is working, and there is no need to stop the machine for cleaning, which is more convenient to use;

[0015] 3. By arranging an air-drying duct and a conveying fan, air can be conveyed to the inside of the installation shell, so that the filter plate can be dried. By arranging one end of the air-drying duct in the air outlet of the air purifier, the filter plate can be disinfected and cleaned by the negative ions generated by the ultraviolet lamp when the filter plate is dried, ensuring that no bacteria or other harmful substances will remain on the filter plate, ensuring the cleanliness of the filter plate, thereby ensuring the normal operation and work of the air purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional schematic diagram of the cleaning structure of the unit-type ultraviolet air purifier of the utility model;

[0017] Figure 2 The schematic diagram of the internal three-dimensional structure of the cleaning structure of the unit-type ultraviolet air purifier of the utility model is shown;

[0018] Figure 3 What is shown is a cross-sectional three-dimensional structural schematic diagram of the cleaning structure of the unit-type ultraviolet air purifier of the utility model;

[0019] Figure 4 Another cross-sectional three-dimensional structural schematic diagram of the cleaning structure of the unit-type ultraviolet air purifier of the utility model is shown;

[0020] Explanation of the reference numerals: 1. Purifier housing; 2. Filter plate; 3. Sealing assembly; 4. Lifting assembly; 5. Cleaning assembly; 6. Water spraying assembly; 7. Drainage assembly; 8. Drying assembly; 301. Fixing plate; 302. Sealing plate; 303. Sealing motor; 304. Sealing screw; 401. Lifting motor; 402. Lifting screw; 403. Limiting rod; 501. Mounting housing; 502. Cleaning motor; 503. Cleaning brush; 601. Water tank; 602. Connecting pipe; 603. Electric valve; 604. Pressurizing pump; 605. Pressurizing box; 606. Spray nozzle; 701. Drain trough; 702. Drainage pipe; 801. Air-drying pipe; 802. Conveying fan. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1The utility model provides an embodiment: a unit-type ultraviolet air purifier cleaning structure, including a purifier shell 1, a filter plate 2, a sealing component 3, a lifting component 4, a cleaning component 5, a water spray component 6, a drainage component 7 and a drying component 8, the filter plate 2 is arranged in two groups, the filter plate 2 is arranged inside the purifier shell 1, the sealing component 3 is arranged inside the purifier shell 1, the sealing component 3 is connected to the filter plate 2 in abutment, the lifting component 4 is arranged inside the purifier shell 1, the cleaning component 5 is connected to the lifting component 4, the water spray component 6 is arranged inside the cleaning component 5, the drainage component 7 is arranged on the bottom surface of the purifier shell 1, and the drying component 8 is arranged inside the cleaning component 5.

[0023] See also Figure 2-4In this embodiment, the sealing assembly 3 includes a fixing plate 301, a sealing plate 302, a sealing motor 303 and a sealing screw 304. The fixing plate 301 is arranged inside the purifier housing 1, and the fixing plate 301 is fixedly connected to the inner side wall of the purifier housing 1. The sealing plate 302 is arranged in two groups, and the sealing plate 302 is arranged on one side of the fixing plate 301. The sealing motor 303 is arranged in multiple groups, and the sealing motor 303 is arranged on the bottom surface of the purifier housing 1. The sealing screw 304 is arranged in multiple groups, and the sealing screw 304 is arranged inside the purifier housing 1. One end of the sealing screw 304 is fixedly connected to the output end of the sealing motor 303, and the sealing plate 302 is threadedly connected to the sealing screw 304. When in use, the two groups of filter plates 2 can be separated by setting the fixed plate 301, the sealing screw 304 can be driven to rotate by setting the sealing motor 303, and the sealing plate 302 can be driven to rise and fall by setting the sealing screw 304, so that the two groups of filter plates 2 can be sealed, so that the filter plates 2 can be cleaned when the air purifier is working, and there is no need to stop the machine for cleaning, which is more convenient to use. The lifting component 4 is set to two groups, and the two groups of lifting motors 401 are respectively set above and below the fixed plate 301. The lifting component 4 includes a lifting motor 401, a lifting screw 402 and a limit rod 403. The lifting motor 401 is set to two groups, and one of the two lifting motors 401 is set at the purifier The top surface of the purifier housing 1, the other of the two lifting motors 401 is arranged on the bottom surface of the purifier housing 1, the lifting screw 402 is arranged in two groups, one end of the lifting screw 402 is fixedly connected to the output end of the lifting motor 401, the limiting rod 403 is arranged inside the purifier housing 1, and the limiting rod 403 penetrates the fixed plate 301. When in use, the lifting motor 401 can be set to drive the lifting screw 402 to rotate, and the cleaning component 5 includes an installation housing 501, a cleaning motor 502 and a cleaning brush 503. The installation housing 501 is arranged in two groups, and the installation housing 501 is sleeved on the filter plate 2. The installation housing 501 is threadedly connected to the lifting screw 402, and the installation housing 501 is connected to the limiting rod 403 is slidingly connected, the cleaning motor 502 is arranged in multiple groups, the cleaning motor 502 is arranged on one side of the mounting shell 501, the cleaning brush 503 is arranged in multiple groups, the cleaning brush 503 is arranged inside the mounting shell 501, and one end of the cleaning brush 503 is fixedly connected to the output end of the cleaning motor 502. When in use, the cleaning motor 502 and the cleaning brush 503 can be installed by setting the mounting shell 501, and when the lifting screw 402 rotates, the mounting shell 501 can be driven to rise and fall. The cleaning motor 502 can be driven to rotate by setting the cleaning brush 503, so that the filter plate 2 can be cleaned when the mounting shell 501 drives the cleaning motor 502 and the cleaning brush 503 to rise and fall.

[0024] The water spray assembly 6 includes a water tank 601, a connecting pipe 602, an electric valve 603, a pressure pump 604, a pressure box 605 and a nozzle 606. The water tank 601 is arranged on the top surface of the purifier housing 1, the connecting pipe 602 is arranged in two groups, the connecting pipe 602 is arranged in a retractable material, one end of the connecting pipe 602 is connected to the water tank 601, the pressure box 605 is arranged in two groups, the pressure box 605 is arranged on one side of the installation housing 501, the other end of the connecting pipe 602 is connected to the pressure box 605, the pressure pump 604 is arranged on the connecting pipe 602, and the electric valve 60 3 is arranged on the connecting pipe 602, the nozzle 606 is arranged in multiple groups, the nozzle 606 is arranged on the inner side wall of the installation shell 501, the nozzle 606 is connected with the pressurizing tank 605, when in use, the water storage tank 601 can be arranged to store clean water, the water storage tank 601 can be connected with the pressurizing tank 605 by arranging the connecting pipe 602, the electric valve 603 and the pressurizing pump 604 can be arranged to realize the orderly delivery of the water in the water storage tank 601 to the inside of the two groups of installation shells 501, and the two groups of filter plates 2 are cleaned respectively by spraying out with the nozzle 606, and the drainage component 7 includes a drainage groove 701 and a drainage pipe 702, the drainage groove 701 is set in two groups, the drainage groove 701 is set below the two groups of filter plates 2, the drainage pipe 702 is set on one side of the purifier housing 1, the drainage groove 701 and the drainage pipe 702 are connected through, when in use, the sewage after cleaning the filter plate 2 can be discharged into the drainage pipe 702 by setting the drainage groove 701, and discharged by the drainage pipe 702, the air-drying component includes an air-drying pipe 801 and a conveying fan 802, the air-drying pipe 801 is set in two groups, one end of the air-drying pipe 801 is set in the air outlet end of the purifier housing 1, and the air-drying pipe 801 is connected to the air outlet end of the purifier housing 1. The other end of 01 is connected with the installation shell 501, and the conveying fan 802 is arranged on the air-drying duct 801. When in use, the air can be transported to the inside of the installation shell 501 by arranging the air-drying duct 801 and the conveying fan 802, so that the filter plate 2 can be dried, and by arranging one end of the air-drying duct 801 in the air outlet of the air purifier, when the filter plate 2 is dried, the negative ions generated by the ultraviolet lamp can be used to disinfect and clean the filter plate 2, to ensure that no harmful substances such as bacteria will remain on the filter plate 2, to ensure the cleanliness of the filter plate 2, thereby ensuring the normal operation and work of the air purifier.

[0025] When working, the two groups of filter plates 2 are separated by the fixing plate 301, the sealing motor 303 is used to drive the sealing screw 304 to rotate, and the sealing screw 304 is used to drive the sealing plate 302 to rise and fall, so as to achieve the sealing of the two groups of filter plates 2, so that the filter plates 2 can be cleaned when the air purifier is working, without stopping the machine for cleaning, and the use is more convenient;

[0026] The lifting motor 401 is used to drive the lifting screw 402 to rotate, and the installation housing 501 is used to drive the cleaning motor 502 and the cleaning brush 503 to be installed. When the lifting screw 402 rotates, the installation housing 501 is driven to be lifted and lowered, and the cleaning motor 502 is used to drive the cleaning brush 503 to rotate, so that when the installation housing 501 drives the cleaning motor 502 and the cleaning brush 503 to be lifted and lowered, the filter plate 2 is cleaned;

[0027] The clean water is stored in the water tank 601, and the water tank 601 is connected to the pressure tank 605 by the connecting pipe 602. The electric valve 603 and the pressure pump 604 are used to orderly transport the water in the water tank 601 to the inside of the two sets of installation shells 501, and the water is sprayed out by the nozzle 606 to clean the two sets of filter plates 2 respectively.

[0028] The sewage after cleaning the filter plate 2 is discharged into the drainage pipe 702 by using the drainage groove 701 and discharged by using the drainage pipe 702;

[0029] The air is transported to the interior of the installation shell 501 by using the air drying duct 801 and the conveying fan 802, so as to dry the filter plate 2. By setting one end of the air drying duct 801 in the air outlet of the air purifier, the filter plate 2 can be disinfected and cleaned by the negative ions generated by the ultraviolet lamp when the filter plate 2 is dried, ensuring that no harmful substances such as bacteria will remain on the filter plate 2, ensuring the cleanliness of the filter plate 2, thereby ensuring the normal operation and operation of the air purifier.

[0030] Through the above steps, the internal structure of the air purifier and the sealing component 3, the lifting component 4, the cleaning component 5, the water spraying component 6, the drainage component 7 and the drying component 8 are installed using the purifier housing 1, the filtering function of the air purifier is realized using the filter plate 2, the sealing component 3 is used to seal the filter plate 2 to prevent dust and sewage from being scattered during cleaning, the lifting component 4 is used to drive the cleaning component 5 to rise and fall, the cleaning component 5 is used to clean the filter plate 2, the water spraying component 6 is used to spray water when cleaning the filter plate 2 to increase the cleaning effect, the drainage component 7 is used to discharge the sewage generated during cleaning, and the drying component 8 is used to dry the filter plate 2.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A unit-type ultraviolet air purifier cleaning structure, comprising a purifier housing (1); characterized in that: The utility model also comprises a filter plate (2), a sealing component (3), a lifting component (4), a cleaning component (5), a water spray component (6), a drainage component (7) and a drying component (8); the filter plate (2) is arranged in two groups; the filter plate (2) is arranged inside the purifier housing (1); the sealing component (3) is arranged inside the purifier housing (1); the sealing component (3) is abuttingly connected to the filter plate (2); the lifting component (4) is arranged inside the purifier housing (1); the cleaning component (5) is connected to the lifting component (4); the water spray component (6) is arranged inside the cleaning component (5); the drainage component (7) is arranged on the bottom surface of the purifier housing (1); and the drying component (8) is arranged inside the cleaning component (5).

2. The unit-type ultraviolet air purifier cleaning structure according to claim 1 is characterized in that: The sealing assembly (3) comprises a fixing plate (301), a sealing plate (302), a sealing motor (303) and a sealing screw (304); the fixing plate (301) is arranged inside the purifier housing (1); the fixing plate (301) is fixedly connected to the inner side wall of the purifier housing (1); the sealing plates (302) are arranged in two groups; the sealing plates (302) are arranged on one side of the fixing plate (301); the sealing motor (303) is arranged in multiple groups; the sealing motor (303) is arranged on the bottom surface of the purifier housing (1); the sealing screw (304) is arranged in multiple groups; the sealing screw (304) is arranged inside the purifier housing (1); one end of the sealing screw (304) is fixedly connected to the output end of the sealing motor (303); and the sealing plate (302) is threadedly connected to the sealing screw (304).

3. The unit-type ultraviolet air purifier cleaning structure according to claim 2 is characterized in that: The lifting assembly (4) is provided in two groups, and the two groups of lifting motors (401) are respectively provided above and below the fixed plate (301). The lifting assembly (4) comprises a lifting motor (401), a lifting screw (402) and a limit rod (403). The lifting motor (401) is provided in two groups, one of the two groups of lifting motors (401) is provided on the top surface of the purifier housing (1), and the other of the two groups of lifting motors (401) is provided on the bottom surface of the purifier housing (1). The lifting screw (402) is provided in two groups, one end of the lifting screw (402) is fixedly connected to the output end of the lifting motor (401), and the limit rod (403) is provided inside the purifier housing (1), and the limit rod (403) passes through the fixed plate (301).

4. The unit-type ultraviolet air purifier cleaning structure according to claim 3 is characterized in that: The cleaning assembly (5) comprises a mounting shell (501), a cleaning motor (502) and a cleaning brush (503); the mounting shell (501) is arranged in two groups; the mounting shell (501) is sleeved on the filter plate (2); the mounting shell (501) is threadedly connected to the lifting screw (402); the mounting shell (501) is slidably connected to the limit rod (403); the cleaning motor (502) is arranged in multiple groups; the cleaning motor (502) is arranged on one side of the mounting shell (501); the cleaning brush (503) is arranged in multiple groups; the cleaning brush (503) is arranged inside the mounting shell (501); one end of the cleaning brush (503) is fixedly connected to the output end of the cleaning motor (502).

5. The unit-type ultraviolet air purifier cleaning structure according to claim 4 is characterized in that: The water spray assembly (6) comprises a water storage tank (601), a connecting pipe (602), an electric valve (603), a pressure pump (604), a pressure tank (605) and a spray head (606). The water storage tank (601) is arranged on the top surface of the purifier housing (1). The connecting pipe (602) is arranged in two groups. The connecting pipe (602) is arranged to be a retractable material. One end of the connecting pipe (602) is connected to the water storage tank (601). The pressure tank (605) is arranged to be Two groups, a pressurizing box (605) is arranged on one side of the installation shell (501), the other end of the connecting pipe (602) is connected to the pressurizing box (605), the pressurizing pump (604) is arranged on the connecting pipe (602), the electric valve (603) is arranged on the connecting pipe (602), the nozzle (606) is arranged in multiple groups, the nozzle (606) is arranged on the inner side wall of the installation shell (501), and the nozzle (606) is connected to the pressurizing box (605).

6. The unit-type ultraviolet air purifier cleaning structure according to claim 5, characterized in that: The drainage assembly (7) comprises a drainage trough (701) and a drainage pipe (702); the drainage trough (701) is provided in two groups; the drainage trough (701) is provided below the two groups of filter plates (2); the drainage pipe (702) is provided on one side of the purifier housing (1); and the drainage trough (701) and the drainage pipe (702) are connected in a through manner.

7. The unit-type ultraviolet air purifier cleaning structure according to claim 6, characterized in that: The air-drying component comprises an air-drying duct (801) and a conveying fan (802); the air-drying duct (801) is arranged in two groups; one end of the air-drying duct (801) is arranged in the air outlet end of the purifier housing (1); the other end of the air-drying duct (801) is connected to the mounting housing (501); and the conveying fan (802) is arranged on the air-drying duct (801).

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