Exhaust filtering device for dehumidification dryer and use method of exhaust filtering device

Abstract

The exhaust filtering device comprises a shell assembly, the two sides of the shell assembly are provided with an air inlet end and an exhaust end correspondingly, the air inlet end of the shell assembly communicates with a corrugated pipe, the tail end of the corrugated pipe is rotationally provided with a threaded connector, and the exhaust end of the shell assembly is provided with an exhaust outlet; a fan cover matched with the exhaust outlet is fixedly arranged at the exhaust end of the shell assembly, and springs are fixedly arranged at the four corners of the bottom of the shell assembly. According to the multi-stage filtering assembly, comprehensive purification from coarse particles to small particles to gaseous pollutants is covered, and compared with the design of a single filter screen, the filtering efficiency is remarkably improved, and it is ensured that the exhaust cleanliness is higher; according to the self-cleaning mechanism, accumulated dust on the metal net falls off and falls into the ash bucket capable of being pulled out through high-frequency vibration of the vibration motor, frequent manual disassembly and cleaning are not needed, the blocking frequency of the filter net is reduced, the long-term stable filtering performance is maintained, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of accessories for dehumidifying and drying machines, and particularly to an exhaust air filtering device for a dehumidifying and drying machine and its usage method. Background Art

[0002] When a dehumidifying and drying machine is operating, it will discharge moisture and hot air through an exhaust air system. During the exhaust process, dust, fiber debris, or other tiny particles are often mixed in. If these particles are directly discharged without treatment, they will not only pollute the indoor air, but may also block the exhaust duct, reduce the equipment efficiency, and even shorten the equipment life. The existing filtering devices usually have a simple structure, limited filtering effect, and are not convenient for cleaning or replacement, making it difficult to meet the requirements of long-term efficient operation. Therefore, an exhaust air filtering device that can efficiently filter the exhaust air, is convenient for maintenance, and takes into account the operating characteristics of the dehumidifying and drying machine is needed. Summary of the Invention

[0003] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose an exhaust air filtering device for a dehumidifying and drying machine and its usage method.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An exhaust air filtering device for a dehumidifying and drying machine includes a housing assembly. An air inlet end and an air outlet end are respectively arranged on both sides of the housing assembly. A corrugated pipe is connected to the air inlet end of the housing assembly. A threaded connector is rotatably installed at the end of the corrugated pipe. An air outlet is arranged at the air outlet end of the housing assembly. A wind hood matching the air outlet is fixedly arranged on the air outlet end of the housing assembly. Four corners of the bottom of the housing assembly are fixedly provided with springs, and feet are fixed at the ends of the springs; a multi-stage filtering assembly, which includes a metal mesh, a HEPA filter, and an adsorption filter. The metal mesh, the HEPA filter, and the adsorption filter are detachably arranged in the housing assembly in sequence from the air inlet end to the air outlet end of the housing assembly; a self-cleaning mechanism, which includes a vibration motor arranged on the top of the housing assembly and an ash hopper housing fixed at the bottom of the housing assembly. A pull-out ash hopper is arranged in the ash hopper housing.

[0006] Preferably, a dust falling opening corresponding to the metal mesh is formed at the bottom of the housing assembly. The dust falling opening is arranged directly above the ash hopper housing, and the ash hopper housing is interconnected with the inside of the housing assembly through the ash hopper housing.

[0007] Preferably, the metal mesh adopts a metal grid, and the aperture range is 0.5 - 1 mm.

[0008] Preferably, the adsorption filter includes a first filter screen. A middle frame is fixed at the edge of the first filter screen. A second filter screen is fixed on one side of the middle frame. Activated carbon particles are filled in the cavity formed among the first filter screen, the middle frame, and the second filter screen.

[0009] Preferably, several insertion openings matching the metal mesh, HEPA filter, and adsorption filter are provided at the top of the housing assembly, and sliding grooves matching the metal mesh, HEPA filter, and adsorption filter are provided on the inner wall of the housing assembly.

[0010] Preferably, it further includes an intelligent monitoring system, which includes a differential pressure sensor and an indicator light assembly arranged on the outer wall of the housing assembly.

[0011] Preferably, the low-pressure detection end of the differential pressure sensor extends into the interior of the housing assembly and is placed between the HEPA filter and the adsorption filter, and the high-pressure detection end of the differential pressure sensor extends into the interior of the housing assembly and is placed between the metal mesh and the air inlet end of the housing assembly.

[0012] Preferably, the indicator light assembly includes a single-chip microcomputer and an indicator light. The single-chip microcomputer is electrically connected to the indicator light, the differential pressure sensor, and the vibration motor.

[0013] Preferably, rubber sealing rings are used to seal between the metal mesh, HEPA filter, and adsorption filter and the insertion openings, and the rubber sealing rings are arranged at the edges of the insertion openings.

[0014] A usage method of an exhaust air filtering device, which is used for an exhaust air filtering device of a dehumidifying dryer, and the steps of the usage method are as follows: S1. Connect the threaded connection head of the device to the exhaust air outlet of the dehumidifying dryer to ensure tightness, and connect the indicator light assembly of the device to the control panel of the dehumidifying dryer; S2. Start the dehumidifying dryer, and the device runs automatically with the exhaust air; S3. When the indicator light assembly lights up, turn off the device and take out the blocked metal mesh, HEPA filter, or adsorption filter for cleaning or replacement; S4. Regularly open the ash hopper to clean the accumulated dust; S5. Adjust the direction of the air hood as needed to optimize the exhaust air path.

[0015] The present invention has the following beneficial effects:

[0016] 1. The multi-stage filtering assembly provided by the present invention covers comprehensive purification from coarse particles to fine particles and then to gaseous pollutants. Compared with a single filter design, the filtering efficiency is significantly improved, ensuring higher exhaust air cleanliness.

[0017] 2. The self-cleaning mechanism provided by the present invention makes the dust on the metal mesh fall off by the high-frequency vibration of the vibration motor and fall into the pull-out ash hopper, eliminating the need for frequent manual disassembly and cleaning, reducing the frequency of filter clogging, maintaining long-term stable filtering performance, and extending the service life of the device.

[0018] 3. In the intelligent monitoring system provided by the present invention, the differential pressure sensor monitors the air pressure difference before and after the filter. When the filter is severely clogged, the indicator light lights up, prompting the user to clean or replace it in time, avoiding blind maintenance, and improving the operating efficiency and reliability of the filtering device. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of an exhaust air filtering device for a dehumidifying and drying machine in the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of an exhaust air filtering device for a dehumidifying and drying machine in the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the housing assembly in the state where the metal mesh, HEPA filter, adsorption filter, and ash hopper are pulled out;

[0022] Figure 4 It is an exploded structure diagram of the adsorption filter;

[0023] Figure 5 It is a method flow chart of the usage method of an exhaust air filtering device in the present invention.

[0024] In the figure: 1. Housing assembly; 101. Bellows; 102. Threaded connector; 103. Air outlet; 104. Air hood; 105. Spring; 106. Support feet; 107. Ash discharge port; 108. Ash hopper housing; 109. Ash hopper; 110. Slide groove; 111. Vibration motor; 112. Insertion port; 113. Differential pressure sensor; 114. Indicator light assembly; 2. Metal mesh; 3. HEPA filter; 4. Adsorption filter; 401. First filter screen; 402. Middle frame; 403. Second filter screen; 404. Activated carbon particles. Detailed Embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figures 1-4, an exhaust air filtering device for a dehumidifying and drying machine, comprising a housing assembly 1. An air inlet end and an air outlet end are respectively arranged on both sides of the housing assembly 1. The air inlet end of the housing assembly 1 is communicated with a corrugated pipe 101. A threaded connector 102 is rotatably installed at the end of the corrugated pipe 101. An air outlet 103 is arranged at the air outlet end of the housing assembly 1. A wind hood 104 matching the air outlet 103 is fixedly arranged on the air outlet end of the housing assembly 1. Springs 105 are fixedly arranged at the four corners of the bottom of the housing assembly 1, and feet 106 are fixed at the ends of the springs 105; a multi-stage filtering assembly, which includes a metal mesh 2, a HEPA filter screen 3 and an adsorption filter screen 4. The metal mesh 2, the HEPA filter screen 3 and the adsorption filter screen 4 are detachably arranged in the housing assembly 1 in sequence from the air inlet end to the air outlet end of the housing assembly 1; a self-cleaning mechanism, which includes a vibration motor 111 arranged at the top of the housing assembly 1 and a hopper housing 108 fixed at the bottom of the housing assembly 1. A pull-out hopper 109 is arranged in the hopper housing 108.

[0027] In this embodiment, the air inlet end and the air outlet end: As the inlet and outlet of the air flow channel, they ensure that the moisture and hot air discharged from the dehumidifying dryer can smoothly enter the device and be discharged after being processed; the corrugated pipe 101 and the threaded connector 102: The corrugated pipe provides flexible connection to adapt to the air outlets at different angles and distances; the threaded connector facilitates quick installation and disassembly and ensures the sealing performance with the dryer air outlet; the air outlet 103 and the air hood 104: The air outlet guides the purified gas to be discharged, and the air hood adjusts the air discharge direction to avoid directly blowing towards the user, improving the use comfort; the spring 105 and the support feet 106: The spring provides a shock absorption function to reduce the vibration transmission during the operation of the vibration motor; the support feet support the device to ensure the placement stability; it improves the installation adaptability and stability of the device, and the shock absorption design reduces the operation noise, providing a better user experience; the air hood optimizes the air discharge path and reduces the indoor air flow disturbance; the metal mesh 2: As the first-stage coarse filter layer, it intercepts large particles such as clothing fibers to prevent premature clogging of the subsequent filters; the HEPA filter 3: As the second-stage fine filter layer, it filters PM2.5 and smaller particles to improve the air discharge cleanliness; the adsorption filter 4: As the third-stage adsorption layer, it uses activated carbon particles to adsorb odor molecules such as damp odors to improve the air quality; the detachable setting: Through the chute or insertion port design, it is convenient to replace or clean each filter separately; it realizes the hierarchical filtration from coarse particles to fine particles and then to gaseous pollutants, and the purification efficiency is significantly higher than that of the single filter design; the detachable structure reduces the maintenance difficulty and cost, and is more convenient for users to operate; the vibration motor 111: Through high-frequency vibration, the dust accumulated on the metal mesh 2 falls off to keep the coarse filter layer unclogged; the ash hopper housing 108 and the ash hopper 109: The ash hopper housing is fixed at the bottom to collect the fallen particles, and the pull-out ash hopper is convenient for users to regularly clean the accumulated dust; the automatic cleaning function reduces the clogging frequency of the metal mesh, extends the service life of the filter and the overall operation cycle of the device; the ash hopper centrally collects the accumulated dust to avoid secondary scattering of the particles, and the maintenance process is more hygienic; the synergistic effect of the overall structure: The housing assembly provides the installation and air flow guiding basis, the multi-stage filtration assembly realizes efficient purification, and the self-cleaning mechanism maintains the filtration performance. The three work together to form a complete system; while ensuring the air discharge efficiency of the dehumidifying dryer, it significantly improves the air discharge quality and reduces indoor air pollution; through structural optimization, the practicability and durability of the device are enhanced.

[0028] In the present invention, a dust falling port 107 corresponding to the metal mesh 2 is opened at the bottom of the housing assembly 1, the dust falling port 107 is arranged directly above the ash hopper housing 108, and the ash hopper housing 108 communicates with the inside of the housing assembly 1 through the ash hopper housing 108.

[0029] In this embodiment, the dust outlet 107 at the bottom of the housing assembly 1: Location: Corresponding to the metal mesh 2, located at the bottom of the housing assembly 1, serving as the outlet channel for the accumulated dust falling off the metal mesh 2 to ensure that the particulate matter shaken off by the vibration motor 111 can smoothly drain downward; The dust outlet 107 is provided directly above the ash hopper housing 108: Positional relationship: The dust outlet 107 is vertically aligned with the ash hopper housing 108 to ensure that the fallen dust directly falls into the ash hopper housing 108, preventing it from scattering in other areas inside the housing assembly 1; The ash hopper housing 108 is interconnected with the inside of the housing assembly 1 through the ash hopper housing 108: Connection method: The ash hopper housing 108 is both a container for collecting dust and a channel connecting to the internal space of the housing assembly 1, enabling the smooth transfer of accumulated dust from the dust outlet 107 to the ash hopper 109 through the ash hopper housing 108 while maintaining the enclosure inside the device; The dust outlet 107: Corresponding to the metal mesh 2, precisely matching the area cleaned by the vibration motor 111 to ensure efficient discharge of accumulated dust; As a key component of the self-cleaning mechanism, it connects the filter layer and the dust collection system; The vertical layout of the dust outlet 107 and the ash hopper housing 108: Utilizing the gravitational force, the fallen particulate matter naturally falls into the ash hopper housing 108 without the need for additional power assistance; Reducing the spread of dust inside the device and improving the cleaning efficiency; The connection function of the ash hopper housing 108: Connecting the internal space of the housing assembly 1 to the ash hopper 109 to form a closed accumulated dust collection path; Facilitating the pulling out of the ash hopper 109 for cleaning while preventing dust leakage; Enhancing the self-cleaning efficiency: The dust outlet 107 corresponds to the metal mesh 2 to ensure that the accumulated dust from vibration cleaning can be directly discharged, avoiding remaining near the filter screen and causing secondary blockage; The ash hopper housing 108 faces the dust outlet 107, reducing the obstruction of the accumulated dust transmission path and making the cleaning process more efficient; Maintaining the hygiene of the device: Dust is concentrated and falls into the ash hopper 109 inside the ash hopper housing 108 through the dust outlet 107, preventing it from scattering in other areas inside the housing assembly 1 and keeping the inside of the device clean; The pull-out ash hopper 109 is convenient for cleaning, reducing the chance of users coming into contact with dust; Enhancing the structural reliability: The connection design between the ash hopper housing 108 and the housing assembly 1 ensures airtightness, preventing moisture or dust from leaking from the connection points and adapting to the high-humidity environment of the dehumidifying and drying machine; Supporting long-term operation: By promptly removing the accumulated dust on the metal mesh 2, the burden on the subsequent HEPA filter 3 and adsorption filter 4 is reduced, extending the service life of the entire filtration system; This structure closely combines the self-cleaning mechanism vibration motor + ash hopper with the multi-stage filtration component metal mesh to form an efficient accumulated dust removal cycle; The design of the dust outlet 107 and the ash hopper housing 108 optimizes the path of accumulated dust from generation to collection, significantly enhancing the automatic cleaning ability of the device.

[0030] In the present invention, the metal mesh 2 is made of a metal grid with a pore size range of 0.5 - 1 mm.

[0031] In this embodiment, as the first-stage filter layer, it intercepts large particles to ensure corrosion resistance and mechanical strength; the pore size range is 0.5 - 1 mm: it intercepts larger particles such as clothing fibers and allows air to flow smoothly through; the metal mesh 2 intercepts large particles, reduces the burden on the subsequent filter screen, and improves the overall efficiency; the metal mesh material is moisture and heat resistant, extending the service life; the metal mesh 2 is combined with the vibration motor 111, and the accumulated dust is easily shed, improving the cleaning efficiency; it balances the air flow: the pore size of 0.5 - 1 mm ensures both filtration and exhaust efficiency.

[0032] In the present invention, the adsorption filter screen 4 includes a first filter screen 401. A middle frame 402 is fixed at the edge of the first filter screen 401. A second filter screen 403 is fixed to one side of the middle frame 402. Activated carbon particles 404 are filled in the cavity formed among the first filter screen 401, the middle frame 402, and the second filter screen 403.

[0033] In this embodiment, the first filter screen 401: as the outer layer of the adsorption filter screen 4, it preliminarily filters the air flow and supports the structure 401; the middle frame 402: fixes the first filter screen 401 and the second filter screen 403 to form a cavity 402 filled with activated carbon particles 404; the second filter screen 403: as the inner layer, restricts the overflow of the activated carbon particles 404 and further filters the air flow 403; the activated carbon particles 404: are filled in the cavity to adsorb odor molecules such as damp odors in the exhaust air; the effect is efficient odor adsorption: the activated carbon particles 404 effectively remove gaseous pollutants in the exhaust air and improve the air quality 404; the structural stability: the middle frame 402 supports the first filter screen 401 and the second filter screen 403 to ensure the stability of the cavity 402; prevent particle leakage: the first filter screen 401 and the second filter screen 403 double-wrap the activated carbon particles 404 to prevent scattering 401403; improve the purification effect: the adsorption filter screen 4 cooperates with the pre-stage filter screen to comprehensively purify the exhaust air 4.

[0034] In the present invention, several insertion openings 112 matching the metal mesh 2, the HEPA filter screen 3, and the adsorption filter screen 4 are provided at the top of the housing assembly 1, and sliding grooves 110 matching the metal mesh 2, the HEPA filter screen 3, and the adsorption filter screen 4 are provided on the inner wall of the housing assembly 1.

[0035] In this embodiment, the insertion port 112 is provided at the top of the housing assembly 1 and is matched with the metal mesh 2, the HEPA filter 3, and the adsorption filter 4, facilitating the installation and disassembly of the filters 112; the sliding groove 110 is provided on the inner wall of the housing assembly 1 and is matched with the metal mesh 2, the HEPA filter 3, and the adsorption filter 4, guiding and fixing the positions of the filters 110; improving maintenance convenience: the insertion port 112 allows for the quick installation or removal of the metal mesh 2, the HEPA filter 3, and the adsorption filter 4, simplifying cleaning or replacement 112; ensuring installation accuracy: the sliding groove 110 guides the metal mesh 2, the HEPA filter 3, and the adsorption filter 4 into the correct positions, avoiding misalignment or loosening 110; enhancing structural stability: the sliding groove 110 fixes the filters, reducing displacement caused by vibration during operation 110; improving operation efficiency: the cooperation of the insertion port 112 and the sliding groove 110 makes filter maintenance more time-saving and labor-saving.

[0036] In the present invention, it further includes an intelligent monitoring system, and the intelligent monitoring system includes a differential pressure sensor 113 and an indicator light assembly 114 provided on the outer wall of the housing assembly 1.

[0037] In this embodiment, the differential pressure sensor 113 is provided on the outer wall of the housing assembly 1 to monitor the air pressure difference before and after the filter, detecting the degree of filter blockage 113; the indicator light assembly 114 displays the monitoring results of the differential pressure sensor 113, prompting the user about the filter status 114; effect: real-time monitoring of blockage: the differential pressure sensor 113 detects the air pressure difference of the filter, providing accurate blockage information 113; improving user convenience: the indicator light assembly 114 intuitively prompts the timing of filter cleaning or replacement, avoiding blind maintenance 114; enhancing operation efficiency: the differential pressure sensor 113 ensures timely maintenance of the filter, maintaining the filtering performance 113; intelligent operation: the cooperation of the indicator light assembly 114 and the differential pressure sensor 113 improves the automation level of the device 114.

[0038] In the present invention, the low-pressure detection end of the differential pressure sensor 113 extends into the interior of the housing assembly 1 and is placed between the HEPA filter 3 and the adsorption filter 4, and the high-pressure detection end of the differential pressure sensor 113 extends into the interior of the housing assembly 1 and is placed between the metal mesh 2 and the air inlet end of the housing assembly 1.

[0039] In this embodiment, the low-pressure detection end: extends to the inside of the outer shell component 1, is placed between the HEPA filter 3 and the adsorption filter 4, and measures the air pressure at the rear end of the filter 113; the high-pressure detection end: extends to the inside of the outer shell component 1, is placed between the metal mesh 2 and the air inlet end, and measures the air pressure at the front end of the filter 113; accurately monitors blockage: the low-pressure detection end and the high-pressure detection end respectively measure the air pressure difference before and after the HEPA filter 3, and accurately determines the degree of blockage 113; optimizes maintenance timing: the differential pressure sensor 113 provides real-time data to ensure that the filter is cleaned or replaced at the appropriate time 113; improves filtration efficiency: maintains the overall performance of the device by monitoring the status of the metal mesh 2 and the HEPA filter 3 113; supports intelligence: the differential pressure sensor 113 is precisely arranged to enhance the reliability of the intelligent monitoring system 113.

[0040] In the present invention, the indicator light assembly 114 includes a single chip microcomputer and an indicator light, and the single chip microcomputer is electrically connected to the indicator light, the differential pressure sensor 113 and the vibration motor 111 .

[0041] In this embodiment, the single chip microcomputer: processes the signal of the differential pressure sensor 113, controls the operation of the indicator light and the vibration motor 111 114; the indicator light: displays the filter status, prompts the user to operate 114; electrical connection: the single chip microcomputer is connected with the indicator light, the differential pressure sensor 113 and the vibration motor 111 to achieve collaborative work 114; control: the single chip microcomputer automatically adjusts the indicator light and the vibration motor 111 according to the data of the differential pressure sensor 113, thereby improving the level of automation 114; intuitive prompt: the indicator light displays the filter blockage status, which is convenient for the user to maintain in time 114; collaborative cleaning: the single chip microcomputer is linked to the vibration motor 111 to achieve automatic cleaning of accumulated dust 114; improve efficiency: the electrical connection ensures seamless coordination between monitoring and cleaning, and optimizes the performance of the device 114.

[0042] In the present invention, the metal mesh 2 , the HEPA filter 3 , the adsorption filter 4 and the insertion port 112 are all sealed with rubber sealing rings, and the rubber sealing rings are arranged at the edge of the insertion port 112 .

[0043] In this embodiment, the rubber sealing ring is arranged at the edge of the insertion port 112 to seal the gap between the metal mesh 2, the HEPA filter 3 and the adsorption filter 4 and the insertion port 112; the sealing function is to prevent the airflow from leaking from between the metal mesh 2, the HEPA filter 3 and the adsorption filter 4 and the insertion port 112; the sealing performance is improved: the rubber sealing ring ensures that the airflow passes through the metal mesh 2, the HEPA filter 3 and the adsorption filter 4, thereby improving the filtration efficiency; the air leakage is prevented: the sealing ring prevents the unfiltered gas from leaking out of the insertion port 112, thereby enhancing the purification effect; the stability is enhanced: the rubber sealing ring fixes the filter position to reduce loosening during vibration; the sealing ring adapts to the humid and hot environment to maintain long-term sealing performance.

[0044] Reference Figure 5, A method of using an exhaust air filtering device for an exhaust air filtering device of a dehumidifying dryer, and the steps of the method are as follows: S1. Connect the threaded connector 102 of the device to the exhaust air outlet of the dehumidifying dryer to ensure tightness, and connect the indicator light assembly 114 of the device to the control panel of the dehumidifying dryer; S2. Start the dehumidifying dryer, and the device runs automatically with the exhaust air; S3. When the indicator light assembly 114 lights up, turn off the device and take out the clogged metal mesh 2, HEPA filter 3 or adsorption filter 4 for cleaning or replacement; S4. Regularly open the ash hopper 109 to clean the accumulated dust; S5. Adjust the direction of the air hood 104 as needed to optimize the exhaust air path.

[0045] As described above, only the preferred specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An exhaust filter device for a dehumidifying dryer, characterized in that: The invention comprises a housing component (1), wherein an air inlet end and an air outlet end are respectively arranged on both sides of the housing component (1), the air inlet end of the housing component (1) is connected to a bellows (101), a threaded connector (102) is rotatably mounted on the end of the bellows (101), an air outlet (103) is arranged on the air outlet end of the housing component (1), a wind shield (104) matching the air outlet (103) is fixedly arranged on the air outlet end of the housing component (1), springs (105) are fixedly arranged at the four corners of the bottom of the housing component (1), and a support foot (106) is fixedly arranged at the end of the spring (105); A multi-stage filter assembly, the multi-stage filter assembly comprising a metal mesh (2), a HEPA filter (3) and an adsorption filter (4), the metal mesh (2), the HEPA filter (3) and the adsorption filter (4) being detachably arranged in sequence in the housing assembly (1) from the air inlet end to the air outlet end of the housing assembly (1); A self-cleaning mechanism comprises a vibration motor (111) arranged at the top of a housing component (1) and an ash hopper housing (108) fixed at the bottom of the housing component (1), wherein a pull-out ash hopper (109) is arranged in the ash hopper housing (108).

2. The exhaust filter device for a dehumidifying dryer according to claim 1, characterized in that: The bottom of the housing component (1) is provided with an ash dropout opening (107) corresponding to the metal mesh (2); the ash dropout opening (107) is arranged directly above the ash hopper housing (108); the ash hopper housing (108) and the housing component (1) are connected to each other through the ash hopper housing (108).

3. The exhaust filter device for a dehumidifying dryer according to claim 1, characterized in that: The metal net (2) is a metal mesh with a pore size ranging from 0.5 to 1 mm.

4. The exhaust filter device for a dehumidifying dryer according to claim 1, characterized in that: The adsorption filter (4) comprises a first filter (401), a middle frame (402) is fixed at the edge of the first filter (401), a second filter (403) is fixed on one side of the middle frame (402), and a cavity formed between the first filter (401), the middle frame (402) and the second filter (403) is filled with activated carbon particles (404).

5. The exhaust filter device for a dehumidifying dryer according to claim 1, characterized in that: The top of the shell component (1) is provided with a plurality of insertion ports (112) matching the metal mesh (2), the HEPA filter (3) and the adsorption filter (4), and the inner wall of the shell component (1) is provided with a slide groove (110) matching the metal mesh (2), the HEPA filter (3) and the adsorption filter (4).

6. The exhaust filter device for a dehumidifying dryer according to claim 1, characterized in that: It also includes an intelligent monitoring system, which includes a differential pressure sensor (113) and an indicator light assembly (114) arranged on the outer wall of the housing assembly (1).

7. The exhaust air filter device for a dehumidifying dryer according to claim 6, characterized in that: The low-pressure detection end of the differential pressure sensor (113) extends to the interior of the housing component (1) and is placed between the HEPA filter (3) and the adsorption filter (4), and the high-pressure detection end of the differential pressure sensor (113) extends to the interior of the housing component (1) and is placed between the metal mesh (2) and the air inlet end of the housing component (1).

8. The exhaust filter device for a dehumidifying dryer according to claim 6, characterized in that: The indicator light assembly (114) comprises a single chip computer and an indicator light, and the single chip computer is electrically connected to the indicator light, the differential pressure sensor (113) and the vibration motor (111).

9. The exhaust filter device for a dehumidifying dryer according to claim 1, characterized in that: The metal mesh (2), the HEPA filter (3), the adsorption filter (4) and the insertion port (112) are all sealed with a rubber sealing ring, and the rubber sealing ring is arranged at the edge of the insertion port (112).

10. A method for using an exhaust filter device, used for an exhaust filter device for a dehumidifying dryer according to any one of claims 1 to 9, characterized in that: The steps of using the method are as follows: S1. Connect the threaded connector (102) of the device to the exhaust port of the dehumidification dryer to ensure tightness, and connect the indicator light assembly (114) of the device to the control panel of the dehumidification dryer; S2, start the dehumidification dryer, and the device automatically runs with exhaust air; S3. When the indicator light assembly (114) lights up, turn off the device, remove the clogged metal mesh (2), HEPA filter (3) or adsorption filter (4), and clean or replace them; S4, regularly open the ash hopper (109) to clean the accumulated dust; S5. Adjust the direction of the wind hood (104) as needed to optimize the exhaust path.

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