A dustproof filtering device for an air conditioner fresh air pipe inlet

Abstract

The utility model discloses a dustproof filter device for air conditioning fresh air pipe entrance belongs to air conditioning fresh air purification technical field. The device includes box, filter screen, self -cleaning subassembly and condensate water cleaning subassembly. Self -cleaning subassembly is located in filter screen air inlet side, and its power part is the fan driven by the inlet air flow, and the transmission mechanism is planetary gear set, drives at least two cleaning cylinders to carry out compound motion on the filter screen surface. Condensate water cleaning subassembly includes water inlet pipe, water outlet pipe and water distribution structure, and water distribution structure utilizes the water seepage sponge of deflector and to even flow guide air conditioning condensate water to the filter screen surface, and is wet -type cleaning with cleaning cylinder. The utility model discloses utilize the automatic drive cleaning of fresh air flow, and recycle condensate water as cleaning medium, need not external power and additional water source, has compact structure, energy -conserving and environment -friendly, clean efficient, reduces maintenance cost and so on advantages.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning fresh air purification technology, specifically a dust filter device for the inlet of an air conditioning fresh air duct. Background Technology

[0002] With increasing societal demands for indoor air quality, the fresh air handling unit of air conditioning systems is receiving growing attention. As the first point of entry for outside air into the air conditioning system, the filtration efficiency of the fresh air duct directly impacts the operational efficiency and air quality of subsequent equipment. Traditional fresh air filtration devices often employ single- or multi-layer filter structures, removing particulate matter from the air through physical interception. However, during prolonged operation, the filters easily accumulate dust, pollutants such as catkins, leading to increased air resistance, decreased filtration efficiency, and even affecting the normal operation and energy efficiency of the air conditioning unit. Therefore, there is an urgent need for a self-cleaning dust filter device to ensure continuous and efficient filter operation, reducing maintenance frequency and labor costs.

[0003] In existing technologies, filter cleaning largely relies on manual disassembly and washing or simple mechanical scraping, such as the "timed flushing device for air conditioning unit filters" disclosed in patent CN221333259U. While such devices achieve automatic spraying and brushing of the filters, they still have certain limitations: firstly, the cleaning process typically relies on an external water source and an independent drive motor, resulting in a complex structure and high energy consumption; secondly, the cleaning methods are mostly timed or remotely triggered, failing to fully consider the actual operating status of the fresh air system and the degree of filter contamination, potentially leading to untimely cleaning or resource waste. Furthermore, most existing devices do not fully utilize the condensate generated by the air conditioning system itself as a cleaning medium, failing to achieve resource recycling and system integration optimization. Therefore, it is necessary to develop a compact dust filter device that can achieve intelligent cleaning using the system's own conditions to improve the automation level and overall energy efficiency of the fresh air filtration system. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a dust filter device for the inlet of an air conditioning fresh air duct. It has the advantages of automatically driving cleaning using fresh air flow and achieving self-cleaning of the filter screen with the help of air conditioning condensate. This solves the problems of traditional filter screen cleaning relying on external energy, passive cleaning methods, and low resource utilization.

[0005] (II) Technical Solution To achieve the above-mentioned goal of automatically driving cleaning using fresh airflow and using air conditioner condensate to achieve self-cleaning of the filter, this utility model provides the following technical solution: A dust filter device for the inlet of a fresh air duct in an air conditioner includes a housing with an air outlet at the end, the housing having an opening at the front end and containing a filter screen, a self-cleaning component, and a condensate cleaning component. The self-cleaning component is disposed on the air inlet side of the filter screen and includes a power component driven by the air inlet airflow, a transmission mechanism connected to the output end of the power component, and a cleaning component driven by the transmission mechanism to clean the surface of the filter screen. The condensate cleaning assembly includes an inlet pipe for connecting an external air conditioner condensate pipe, an outlet pipe for discharging wastewater, and a water distribution structure. The water distribution structure is located above the filter screen and is used to distribute and guide the condensate to the filter screen surface to complete wet cleaning in conjunction with the action of the cleaning component.

[0006] The cleaning component comprises at least two cleaning rollers capable of revolution and / or rotation.

[0007] The transmission mechanism is a planetary gear set, which includes a fixed disk, an internal gear ring rotatably mounted on the fixed disk, a drive gear coaxially fixed with the output shaft of the power component, and at least three driven gears that mesh with the drive gear and the internal gear ring. The driven gears and the drive gear are rotatably mounted on the fixed disk.

[0008] The cleaning roller is connected to the outer peripheral side of the internal toothed ring.

[0009] The self-cleaning component further includes an elastic pressing mechanism, which includes a limiting shaft and a spring. The filter screen has a fixing part in the middle, and the fixing part has a limit hole; One end of the limiting shaft is connected to the fixed plate, and the other end passes through the limiting hole, and its cross-sectional shape is adapted to the limiting hole to achieve circumferential limiting; The spring applies an elastic force to the fixed plate, causing it to move toward the filter screen, thereby causing the cleaning roller to elastically press against the filter screen surface.

[0010] The water distribution structure includes an inclined guide plate, with the high end of the guide plate located below the water inlet pipe and the low end extending and fitting against or adjacent to the filter screen surface. The lower end of the guide plate is recessed to form a receiving cavity, and a water-permeable sponge is laid in the receiving cavity. The lower end is provided with a water-permeable hole that connects to the water-permeable sponge.

[0011] The inlet pipe is equipped with a flow regulating valve.

[0012] The housing is equipped with a limiting plate for installing and positioning the edge of the filter screen.

[0013] The power component is a fan.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a dust filter device for the inlet of an air conditioning fresh air duct, which has the following beneficial effects: This dust filter device for air conditioning fresh air duct inlets uses a fan driven by the intake airflow to power a planetary gear set, causing a cleaning roller to perform a complex motion on the filter surface. Simultaneously, air conditioning condensate is evenly applied to the filter via a guide plate and a water-permeable sponge, achieving self-driving and self-cleaning without external power or additional water supply. Its compact structure, energy efficiency, and environmental friendliness effectively reduce filter resistance, improve filtration efficiency and overall air conditioning system energy efficiency, and reduce the frequency of manual maintenance and operating costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of the housing and the condensate cleaning assembly in this utility model; Figure 4 This is a schematic diagram of the structure of the filter and self-cleaning component in this utility model; Figure 5 This is a partial structural diagram of the self-cleaning component in this utility model; Figure 6 This is a schematic diagram of the filter structure in this utility model.

[0016] In the diagram: 100, housing; 101, air outlet; 102, limiting plate; 200, filter screen; 201, fixing part; 202, limiting hole; 300, self-cleaning component; 301, power component; 302, transmission mechanism; 3021, fixing plate; 3022, internal gear ring; 3023, driving gear; 3024, driven gear; 303, cleaning component; 304, limiting shaft; 305, spring; 400, condensate cleaning component; 401, water inlet pipe; 402, water outlet pipe; 403, water distribution structure; 4031, guide plate; 4032, accommodating cavity; 4033, water-permeable sponge; 4034, water-permeable hole; 500, flow regulating valve. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] Please see Figure 1-6A dust filter device for the inlet of a fresh air duct in an air conditioner includes a housing 100 with an air outlet 101 at the end, the housing 100 having an opening at the front end and containing a filter screen 200, a self-cleaning component 300, and a condensate cleaning component 400. The self-cleaning component 300 is disposed on the air inlet side of the filter 200 and includes a power component 301 driven by the air inlet airflow, a transmission mechanism 302 connected to the output end of the power component 301, and a cleaning component 303 driven by the transmission mechanism 302 to clean the surface of the filter 200. In this embodiment, the power component 301 is a fan. As the power component 301, the fan blades are directly exposed to the incoming airflow. When fresh air flows into the housing 100, it drives the fan blades to rotate, directly converting the airflow energy into the mechanical energy required for the cleaning components. This design achieves a "wind-cleaning" linkage; as long as the air conditioning and fresh air system is running, it has a self-cleaning power source, requiring no external power supply, thus offering significant energy efficiency advantages.

[0019] The condensate cleaning assembly 400 includes an inlet pipe 401 for connecting an external air conditioning condensate pipe, an outlet pipe 402 for discharging wastewater, and a water distribution structure 403. The water distribution structure 403 is located above the filter screen 200 and is used to distribute and guide the condensate to the surface of the filter screen 200 to complete wet cleaning in conjunction with the action of the cleaning component 303.

[0020] In this embodiment, the cleaning component 303 comprises at least two cleaning rollers capable of revolution and / or rotation. It should be noted that the surface of the cleaning rollers can be covered with flexible bristles or sponge materials, which can both scrape off attached dirt and adsorb fine dust during movement. Using at least two rollers increases the coverage area of ​​a single cleaning cycle, and the combined revolution and rotation motion simulates manual wiping, improving the thoroughness and uniformity of the cleaning.

[0021] It should also be noted that the shape and size of the filter screen 200 should be adapted to the cleaning range of the cleaning roller to ensure good cleaning results.

[0022] In this embodiment, the transmission mechanism 302 is a planetary gear set, which includes a fixed disk 3021, an internal gear ring 3022 rotatably disposed on the fixed disk 3021, a driving gear 3023 coaxially fixed with the output shaft of the power component 301, and at least three driven gears 3024 that mesh with the driving gear 3023 and the internal gear ring 3022. The driven gears 3024 and the driving gear 3023 are rotatably mounted on the fixed disk 3021.

[0023] It should be noted that the planetary gear set has a compact structure and smooth transmission. When the intake airflow drives the power component 301 to rotate, the driving gear 3023 drives multiple driven gears 3024 to rotate. At the same time, the driven gears 3024 mesh with the internal gear ring 3022, causing the internal gear ring 3022 to rotate. Its main advantage is to amplify torque while slowing down the cleaning speed. In order to ensure the airflow velocity in the air conditioning fresh air duct, the rotation speed of the power component 301 cannot be too low. At the same time, if the speed of the cleaning component 303 is too high, it will easily lead to poor cleaning effect and high friction during cleaning, making it difficult to rotate. Therefore, the planetary gear set structure is designed to solve the above problems. In addition, in order to adjust the transmission ratio and optimize the transmission, the size of the driving gear 3023 and the driven gears 3024 can be changed.

[0024] In this embodiment, the cleaning roller is connected to the outer peripheral side of the internal gear ring 3022.

[0025] It should be noted that by directly connecting the cleaning roller to the outer circumference of the internal gear ring 3022, the rotation of the internal gear ring 3022 is directly converted into the revolution of the cleaning roller along the surface of the filter screen 200. At the same time, the roller rotates on its own axis while revolving, forming a "rolling while moving" cleaning mode, which improves the cleaning effect.

[0026] In this embodiment, the self-cleaning component 300 further includes an elastic pressing mechanism, which includes a limiting shaft 304 and a spring 305. A fixing part 201 is provided in the middle of the filter screen 200, and the fixing part 201 has a limiting hole 202. One end of the limiting shaft 304 is connected to the fixing plate 3021, and the other end passes through the limiting hole 202. Its cross-sectional shape is adapted to the limiting hole 202 to achieve circumferential limiting. The spring 305 applies an elastic force to the fixing plate 3021 to move it in the direction of the filter screen 200, so that the cleaning roller is elastically pressed against the surface of the filter screen 200. An end block is also provided at the end of the limiting shaft 304. The spring 305 is sleeved on the limiting shaft 304 and limited to the end block and the fixing part component.

[0027] It should be noted that the elastic pressing mechanism ensures that the cleaning roller and the surface of the filter screen 200 maintain a moderate and constant contact pressure. The elasticity of the spring 305 can adapt to slight unevenness or deformation of the filter screen 200 after long-term use, ensuring consistent cleaning performance. The cooperation between the limiting shaft 304 and the limiting hole 202 prevents the transmission mechanism 302 from rotating as a whole, allowing only slight axial movement, ensuring the accuracy and stability of the movement.

[0028] It should be further explained that the side of the filter 200 away from the fixed plate 3021 is also provided with a support frame to ensure the actual strength of the filter 200, so as to facilitate better cleaning of the self-cleaning component 300.

[0029] In this embodiment, the water distribution structure 403 includes an inclined guide plate 4031. The high end of the guide plate 4031 is located below the water inlet pipe 401, and the low end extends and fits against or is adjacent to the surface of the filter screen 200. The low end of the guide plate 4031 is recessed to form a receiving cavity 4032. A water-permeable sponge 4033 is laid in the receiving cavity 4032, and a water-permeable hole 4034 communicating with the water-permeable sponge 4033 is opened at the low end.

[0030] It should be noted that the inclined guide plate 4031 can collect the condensate flowing out of the water inlet pipe 401 and guide it above the filter screen 200. The water-permeable sponge 4033 in the receiving cavity 4032 plays the role of water storage, buffering, and uniform seepage, avoiding water flow directly impacting the filter screen 200 and causing local over-wetting or splashing. Water is slowly and evenly released through the seepage holes 4034, so that the surface of the filter screen 200 forms a suitable moist state, which facilitates the wet scrubbing of the roller, dissolving and removing sticky dust.

[0031] It should be further noted that when installing this device, the inclined guide plate 4031 should be positioned directly above, so that the condensate will actively permeate the filter screen 200 under the action of gravity, thus achieving wet cleaning.

[0032] In this embodiment, a flow regulating valve 500 is installed on the pipeline connected to the water inlet pipe 401.

[0033] It should be noted that the flow regulating valve 500 allows for manual or automatic adjustment of the condensate supply as needed, either through the control system. This enables precise water resource utilization, avoids waste, and optimizes cleaning performance under different conditions.

[0034] In this embodiment, the housing 100 is provided with a limiting plate 102 for installing and positioning the edge of the filter screen 200.

[0035] It should be noted that the limiting plate 102 forms a stable slot-type mounting frame, allowing the filter screen 200 to be quickly and accurately pushed into the designated position inside the housing 100 and fixed in place, ensuring the seal between the filter screen 200 and the housing 100 and preventing short circuits of unfiltered air. It also facilitates the periodic disassembly and replacement of the filter screen 200.

[0036] In summary, this dust filter for the air conditioning fresh air duct inlet utilizes a fan driven by the intake airflow to power a planetary gear set, causing the cleaning roller to perform a combined motion on the filter screen 200 surface. Simultaneously, air conditioning condensate is evenly applied to the filter screen 200 via the guide plate 4031 and the water-permeable sponge 4033, achieving self-driving and self-cleaning without external power or additional water source. Its compact structure, energy efficiency, and environmental friendliness effectively reduce the air resistance of the filter screen 200, improve filtration efficiency and the overall energy efficiency of the air conditioning system, and reduce the frequency of manual maintenance and operating costs.

[0037] Working Principle: When the air conditioning fresh air system is running, outside air flows in through the front opening of the housing 100. The airflow first drives the fan to rotate, and the fan shaft drives the drive gear 3023 of the planetary gear set to rotate, which in turn drives the cleaning roller connected to the internal gear ring 3022 to perform a combined revolution and rotation motion along the surface of the filter screen 200, dry-brushing the air inlet side of the filter screen 200. At the same time, the condensate generated by the air conditioner is led through the water inlet pipe 401 to the guide plate 4031 of the water distribution structure 403, where it is buffered and evenly seeped out by the water-permeable sponge 4033, wetting the filter screen 200. The wet surface of the filter screen 200, combined with the rolling scrubbing of the cleaning roller, achieves wet cleaning. Dirt flows downward with the water through the filter screen 200 and is finally discharged through the water outlet pipe 402 at the bottom. The pressure of the cleaning components is kept constant by the elastic pressure mechanism, and the entire cleaning process is automatically and continuously carried out along with the operation of the fresh air system.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dust filter for the inlet of an air conditioning fresh air duct, comprising a housing (100) with an air outlet (101) at its end, characterized in that: The housing (100) has an opening at the front end and is equipped with a filter (200), a self-cleaning component (300), and a condensate cleaning component (400). The self-cleaning component (300) is disposed on the air inlet side of the filter (200) and includes a power component (301) driven by the air inlet airflow, a transmission mechanism (302) connected to the output end of the power component (301), and a cleaning component (303) driven by the transmission mechanism (302) to clean the surface of the filter (200). The condensate cleaning assembly (400) includes an inlet pipe (401) for connecting an external air conditioning condensate pipe, an outlet pipe (402) for discharging wastewater, and a water distribution structure (403). The water distribution structure (403) is located above the filter screen (200) and is used to distribute and guide the condensate to the surface of the filter screen (200) to cooperate with the action of the cleaning component (303) to complete wet cleaning.

2. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 1, characterized in that: The cleaning component (303) is at least two cleaning rollers capable of revolution and / or rotation.

3. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 2, characterized in that: The transmission mechanism (302) is a planetary gear set, which includes a fixed disk (3021), an internal gear ring (3022) rotatably mounted on the fixed disk (3021), a driving gear (3023) coaxially fixed with the output shaft of the power component (301), and at least three driven gears (3024) that mesh with the driving gear (3023) and the internal gear ring (3022). The driven gears (3024) and the driving gears (3023) are rotatably mounted on the fixed disk (3021).

4. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 3, characterized in that: The cleaning roller is connected to the outer peripheral side of the internal gear ring (3022).

5. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 3, characterized in that: The self-cleaning component (300) further includes an elastic pressing mechanism, which includes a limiting shaft (304) and a spring (305). The filter screen (200) has a fixing part (201) in the middle, and the fixing part (201) has a limiting hole (202). One end of the limiting shaft (304) is connected to the fixed plate (3021), and the other end passes through the limiting hole (202), and its cross-sectional shape is adapted to the limiting hole (202) to achieve circumferential limiting; The spring (305) applies an elastic force to the fixed plate (3021) to move it toward the filter screen (200), thereby causing the cleaning roller to elastically press against the surface of the filter screen (200).

6. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 1, characterized in that: The water distribution structure (403) includes an inclined guide plate (4031), the high end of which is located below the water inlet pipe (401), and the low end extends and fits against or is adjacent to the surface of the filter screen (200). The lower end of the guide plate (4031) is recessed to form a receiving cavity (4032), and a water-permeable sponge (4033) is laid in the receiving cavity (4032), and a water-permeable hole (4034) is opened at the lower end to connect the water-permeable sponge (4033).

7. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 1, characterized in that: The inlet pipe (401) is connected to a flow regulating valve (500).

8. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 1, characterized in that: The housing (100) is provided with a limiting plate (102) for installing and positioning the edge of the filter screen (200).

9. A dust filter device for the inlet of an air conditioning fresh air duct according to claim 1, characterized in that: The power component (301) is a fan.

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