A dust-collecting self-cleaning device for fresh air equipment

Abstract

This utility model discloses a dust-collecting self-cleaning device for a fresh air system. Its features include: at least one cleaning device slidably installed inside the housing and located on the outdoor air inlet side of the filter layer; and a driving device for driving the cleaning device to reciprocate along the filter layer surface. This utility model uses the driving device to move the cleaning device reciprocally along the filter layer surface, utilizing a fan to generate negative pressure for dust collection, effectively removing surface dust. Dust is drawn in through the air inlet, passes through a rotating air duct, and is discharged from the air outlet, effectively preventing filter layer blockage caused by dust accumulation, thus ensuring the ventilation volume and efficiency of the fresh air system and reducing operating energy consumption. This self-cleaning method eliminates the need for regular manual disassembly and cleaning, significantly reducing maintenance costs and workload, and is particularly suitable for high-rise buildings or hard-to-reach outdoor installations.

Description

Technical Field

[0001] This utility model relates to the field of fresh air equipment technology, specifically to a dust-collecting self-cleaning device for fresh air equipment. Background Technology

[0002] As a key device for improving indoor air quality, fresh air systems typically require an outdoor filter layer to remove dust, particulate matter, and other impurities from the air, preventing them from entering the room and affecting air quality. However, outdoor environments have higher dust content, and the filter layer easily accumulates a large amount of dust over time. If not cleaned promptly, this can lead to filter blockage, significantly reducing the ventilation volume of the fresh air system and increasing energy consumption. Furthermore, regular manual disassembly, cleaning, or replacement of the filter layer is not only cumbersome but also increases maintenance costs. This is especially true for high-rise residential buildings or hard-to-reach outdoor installation locations, where the difficulty and safety issues of manual maintenance are even more pronounced. Existing cleaning solutions for fresh air systems mostly involve manual cleaning or simple brush cleaning structures. Manual cleaning suffers from the aforementioned maintenance inconveniences, while brush cleaning easily causes dust to fly around, with some dust still adhering to the filter layer surface or scattering inside the equipment, resulting in poor cleaning effects and the inability to achieve automated cleaning. Therefore, a dust-collecting self-cleaning device for fresh air systems is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a dust-collecting self-cleaning device for fresh air equipment in order to solve the above problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dust-collecting self-cleaning device for a fresh air system, comprising a housing installed on an outdoor wall and connected to an indoor fresh air system, and a filter layer installed inside the housing, characterized in that: it further comprises at least one cleaning device slidably installed inside the housing and located on the outdoor air inlet side of the filter layer, and a driving device for driving the cleaning device to reciprocate along the surface of the filter layer; the cleaning device comprises a cleaning housing slidably connected to the driving device, a plurality of impellers disposed inside the cleaning housing, and a cleaning air duct disposed on the cleaning housing, the cleaning air duct comprising an air inlet opened on the side of the cleaning housing facing the filter layer for adsorbing dust against the surface of the filter layer, an air outlet opened on the side of the cleaning housing facing away from the filter layer, and a rotating air duct disposed inside the cleaning housing for connecting the air inlet and the air outlet and for accommodating the impellers.

[0005] Preferably, the drive device includes a drive motor disposed within the cleaning housing, a gear disposed on the output end of the drive motor, and a rack disposed on the housing that meshes with the gear.

[0006] Preferably, the device also includes a sliding support mechanism disposed within the housing; the sliding support mechanism includes bearing seats symmetrically disposed on both sides of the housing, a connecting rod whose two ends are rotatably connected to the bearing seats on both sides respectively, a connecting piece whose one end is fixedly connected to the cleaning housing and whose other end is sleeved on the connecting rod, and a bushing sleeved on the connecting rod and fixedly connected to the connecting piece.

[0007] Preferably, the device also includes a guide structure disposed inside the housing to guide the movement of the cleaning device; the guide structure includes a slide rail fixedly installed at the bottom of the housing, a wheel that can roll along the slide rail, and a fixing plate whose one end is rotatably connected to the wheel via a bearing and whose other end is fixedly connected to the cleaning housing.

[0008] Preferably, the device also includes sensors disposed on both sides of the housing for detecting the extreme positions of the cleaning device's movement and electrically connected to the drive unit.

[0009] Preferably, the housing is further provided with a filter screen located on the outdoor air inlet side of the cleaning device and parallel to the filter layer.

[0010] Preferably, the outer casing has an openable side door on one side, and the cleaning casing has a junction box on the side that is electrically connected to the drive motor and the impeller.

[0011] The beneficial effects of this utility model are as follows: This device drives the cleaning device to move back and forth along the surface of the filter layer through the drive device, and uses the impeller to generate negative pressure to suck up dust, which can efficiently remove surface dust; the dust is sucked in through the air inlet, and discharged from the air outlet after passing through the rotating air duct, which effectively avoids the filter layer from being blocked due to dust accumulation, thereby ensuring the ventilation volume and ventilation efficiency of the fresh air equipment and reducing operating energy consumption; this self-cleaning method does not require manual disassembly and cleaning at regular intervals, which significantly reduces maintenance costs and workload, and is especially suitable for high-rise buildings or outdoor installation occasions that are difficult to reach; The dual limiting mechanism of sliding support and guide structure provides reliable support and guidance for the linear movement of the cleaning device, effectively preventing it from shaking or jamming during movement, and significantly ensuring the stability and reliability of the cleaning operation. By setting up sensors, when the cleaning device moves along the surface of the filter layer to the extreme position on either side under the drive of the drive device, the sensor on that side is triggered and transmits the detection signal to the controller; the controller then drives the motor to change direction according to the received signal command, so that the cleaning device automatically moves in the opposite direction to realize the reciprocating cleaning motion along the surface of the filter layer.

[0012] By setting up a filter screen, the air can be initially filtered, protecting the internal drive unit from accidental impacts or blockages, ensuring unobstructed movement of the cleaning device, reducing the filtration burden on the filter layer, extending the service life of the filter layer and the cleaning device, and reducing replacement costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the overall structure of the side door opening of this utility model; Figure 4 This is a schematic diagram of some components of this utility model; Figure 5 This is a cross-sectional view of the cleaning device of this utility model.

[0014] Legend: 1. Outer shell; 2. Filter layer; 3. Cleaning device; 31. Cleaning shell; 32. Impeller; 33. Cleaning duct; 331. Inlet; 332. Outlet; 333. Rotating duct; 4. Drive device; 41. Drive motor; 42. Gear; 43. Rack; 44. Bearing seat; 45. Connecting rod; 46. Connecting piece; 47. Bushing; 48. Slide rail; 49. Rotary wheel; 410. Fixing piece; 5. Sensor; 6. Side door; 7. Junction box. Detailed Implementation

[0015] The following description, in conjunction with the accompanying drawings, further illustrates the dust-collecting self-cleaning device for a fresh air system according to this utility model.

[0016] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0017] See appendix Figure 1-5As shown, this embodiment of a fresh air system includes a dust-collecting self-cleaning device, comprising a housing 1 installed on an outdoor wall and connected to an indoor fresh air system, and a filter layer 2 installed inside the housing 1. The device is characterized by further including at least one cleaning device 3 slidably installed inside the housing 1 and located on the outdoor air inlet side of the filter layer 2, and a driving device 4 for driving the cleaning device 3 to reciprocate along the surface of the filter layer 2. The cleaning device 3 includes a cleaning housing 31 slidably connected to the driving device 4, a plurality of impellers 32 disposed within the cleaning housing 31, and a cleaning duct 33 disposed on the cleaning housing 31. The cleaning duct 33 includes an air intake 331 opened on the side of the cleaning housing 31 facing the filter layer 2 for adhering to the surface of the filter layer 2 and adsorbing dust, an air outlet 332 opened on the side of the cleaning housing 31 facing away from the filter layer 2, and a rotating duct 333 disposed within the cleaning housing 31 for connecting the air intake 331 and the air outlet 332 and for accommodating the impellers 32.

[0018] The outer casing 1 has a sloping structure on the top to facilitate rainwater runoff, and its sides and top extend towards the outdoor air inlet side, forming an effective rainproof shield to prevent wind and rain intrusion. The back of the outer casing 1 has mounting holes for fixing it to an outdoor wall. The number of cleaning devices 3 can be flexibly configured according to the actual cleaning area requirements of the filter surface to meet the cleaning requirements of different equipment specifications. The cleaning device 3 and the drive device 4 are electrically connected to the fresh air equipment and are subject to unified control by the fresh air equipment controller to achieve automated operation. The filter layer 2 can be made of filter cotton, non-woven fabric, activated carbon filter, or other materials with equivalent air filtration function, and is detachably installed on the outer casing 1. When the filter layer 2 is damaged, it can be removed and replaced. During installation, the side of the outer casing 1 with the filter layer 2 should be aligned with the air inlet or air inlet duct of the fresh air equipment and sealed. At the same time, it should be ensured that there are no obstructions in front of the outdoor air inlet side of the outer casing 1 to ensure smooth air entry and effective dust discharge during the cleaning process. When the fresh air equipment runs continuously for a preset time or when the ventilation resistance of the filter layer 2 is detected to increase to a set threshold, the self-cleaning program is automatically started. The impeller 32 in the cleaning device 3 starts to rotate at high speed, forming a strong negative pressure in the cleaning duct 33. The dust accumulated on the surface of the filter layer 2 is sucked in through the air intake 331 under this suction force, and after passing through the rotating duct 333 with the airflow, it is finally discharged outward from the air outlet 332. At the same time, the drive device 4 starts to work, driving the cleaning device 3 to move smoothly and closely against the surface of the filter layer 2. The dust suction and movement are carried out simultaneously, thereby achieving automatic cleaning of the dust on the surface of the filter layer 2 without dead angles and in all directions.

[0019] This device uses a drive unit 4 to move the cleaning unit 3 back and forth along the surface of the filter layer 2. The impeller 32 generates negative pressure to suck up dust, which can efficiently remove surface dust. Dust is sucked in through the air inlet 331, and discharged from the air outlet 332 after passing through the rotating air duct 333. This effectively avoids clogging of the filter layer 2 due to dust accumulation, thereby ensuring the ventilation volume and efficiency of the fresh air equipment and reducing operating energy consumption. This self-cleaning method does not require manual disassembly and cleaning, which significantly reduces maintenance costs and workload. It is especially suitable for high-rise buildings or hard-to-reach outdoor installations.

[0020] See appendix Figure 1 , 4 As shown, the drive device 4 includes a drive motor 41 disposed inside the cleaning housing 31, a gear 42 disposed on the output end of the drive motor 41, and a rack 43 disposed on the housing 1 that meshes with the gear 42. When working, the drive motor 41 starts and drives the gear 42 to rotate. Since the rack 43 is fixed, the meshing transmission between the gear 42 and the rack 43 converts the rotational motion into the linear motion of the entire cleaning device 3, so that it moves back and forth smoothly and accurately along the length direction of the rack 43, thereby achieving comprehensive dust suction and cleaning of the entire surface of the filter layer 2.

[0021] See appendix Figure 4 As shown, it also includes a sliding support mechanism disposed within the outer casing 1; the sliding support mechanism includes bearing seats 44 symmetrically disposed on both sides of the outer casing 1, a connecting rod 45 rotatably connected to the bearing seats 44 on both sides at both ends, a connecting piece 46 fixedly connected at one end to the cleaning housing 31 and sleeved on the connecting rod 45 at the other end, and a bushing 47 sleeved on the connecting rod 45 and fixedly connected to the connecting piece 46; when the drive motor 41 starts, it drives the gear 42 to mesh with the fixed rack 43, and the entire cleaning device 3 begins to move; at this time, the cleaning device 3 and the connecting rod 45 are slidably connected through the connecting piece 46 and the bushing 47, so that the bushing 47 can smoothly slide back and forth along the surface of the connecting rod 45; through the setting of the sliding support mechanism, reliable radial support and guidance are provided for the linear movement of the cleaning device 3, effectively preventing it from shaking or jamming during movement, and significantly ensuring the stability and reliability of the cleaning operation.

[0022] See appendix Figure 4As shown, it also includes a guide structure disposed inside the housing 1 to guide the movement of the cleaning device 3; the guide structure includes a slide rail 48 fixedly installed at the bottom of the housing 1, a roller 49 that can roll along the slide rail 48, and a fixing plate 410 whose one end is rotatably connected to the roller 49 via a bearing and whose other end is fixedly connected to the cleaning housing 31; the upper part of the cleaning device 3 is supported and guided by a sliding support mechanism, and its bottom is supported by a fixed connection with the fixing plate 410; the fixing plate 410 is connected to the roller 49 via a bearing, and the roller 49 keeps in contact with the side of the frame on the housing 1 and can roll along it.

[0023] The dual limiting mechanism of sliding support and guide structure provides reliable support and guidance for the linear movement of cleaning device 3, effectively preventing it from shaking or jamming during movement, and significantly ensuring the stability and reliability of cleaning operations.

[0024] See appendix Figure 4 As shown, it also includes sensors 5 disposed on both sides of the housing 1 for detecting the movement limit position of the cleaning device 3 and electrically connected to the drive device 4; by setting the sensors 5, when the cleaning device 3 moves along the surface of the filter layer 2 to the limit position on either side under the drive of the drive device 4, the sensor 5 on that side is triggered and transmits the detection signal to the controller; the controller then drives the motor 41 to change direction according to the received signal command, so that the cleaning device 3 automatically moves in the opposite direction to realize the reciprocating cleaning motion along the surface of the filter layer 2.

[0025] In one embodiment, the outer casing 1 is further provided with a filter screen located on the outdoor air inlet side of the cleaning device 3 and parallel to the filter layer 2. This filter screen is mainly used to intercept and filter larger particulate impurities in the outdoor air, such as leaves, flying insects, and lint, which can effectively prevent these large particulate pollutants from entering the internal cavity of the outer casing 1. Through the setting of the filter screen, the air can be initially filtered, protecting the internal drive device 4 from accidental impact or blockage, ensuring that the movement path of the cleaning device 3 is unobstructed, reducing the filtration burden on the filter layer 2, extending the service life of the filter layer 2 and the cleaning device 3, and reducing replacement costs.

[0026] See appendix Figure 3-4 As shown, the outer casing 1 has an openable side door 6 on one side, and the cleaning casing 31 has a junction box 7 on its side that is electrically connected to the drive motor 41 and the impeller 32. The external power supply required by the cleaning device 3, as well as the power supply lines for the drive motor 41 and the impeller 32, are all uniformly connected to this junction box 7. This centralized circuit layout not only achieves unified power access and management but also greatly facilitates daily maintenance and troubleshooting. When maintenance is required, simply disconnecting the interface on the junction box 7 at the side door 6 achieves electrical isolation of the entire cleaning device 3, making operation safe and convenient.

[0027] When this utility model is in use, the self-cleaning device 3 will automatically start the cleaning mode when the fresh air equipment has been running for a preset time or when the ventilation resistance of the filter layer 2 is detected to increase to a set threshold. At this time, the drive motor 41 and the impeller 32 are powered on simultaneously. The impeller 32 rotates at high speed, forming a strong negative pressure in the rotating air duct 333 of the cleaning air duct 33. At the same time, the drive motor 41 of the drive device 4 starts, and the drive gear 42 meshes with the fixed rack 43 for transmission. During the transmission process, the upper part of the cleaning device 3 is fixedly connected to the cleaning housing 31 through the connecting piece 46, and is sleeved with the connecting rod 45 through the bushing 47, so that the whole can slide smoothly along the connecting rod 45. At the same time, the rotating wheel 49 at the bottom rolls smoothly along the fixed slide rail 48. Through the synergistic effect of the upper sliding and the bottom rolling, the entire cleaning device 3 is driven to closely fit the surface of the filter layer 2 and move smoothly to one side.

[0028] During the movement of the cleaning device 3, the air intake 331 at its bottom is always in close contact with the surface of the filter layer 2. Under the negative pressure generated by the impeller 32, the dust accumulated on the surface of the filter layer 2 is efficiently sucked into the air intake 331, and then discharged from the air outlet 332 into the internal cavity of the outer shell 1 after passing through the rotating air duct 333. In addition, the airflow discharged from the air outlet 332 can also blow away the primary filter located on the outermost side, helping to shake off or blow away larger particles such as leaves attached to its surface, thus achieving auxiliary cleaning of the primary filter.

[0029] When the cleaning device 3 moves to the extreme position on one side of the housing 1, the sensor 5 installed on that side detects the cleaning device 3 and sends a signal to the drive motor 41 controller. The controller controls the drive motor 41 to rotate in the opposite direction, driving the cleaning device 3 to move in the opposite direction and continue to perform the vacuuming cleaning operation. When the cleaning device 3 moves to the extreme position on the other side, the sensor 5 on the other side triggers a signal, and the drive motor 41 automatically reverses again. This cycle repeats until the preset cleaning time is completed or the ventilation resistance of the filter layer 2 returns to normal. During routine maintenance, staff can open the side door 6 and disconnect the electrical interface on the junction box 7 located on the side of the cleaning housing 31. The entire cleaning device 3 can then be easily slid out along the guide rod 45 for thorough cleaning, maintenance, or component replacement. The operation is extremely simple.

[0030] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A dust-collecting self-cleaning device for a fresh air system, comprising a housing (1) installed on an outdoor wall and communicating with an indoor fresh air system, and a filter layer (2) installed inside the housing (1), characterized in that: It also includes at least one cleaning device (3) slidably installed inside the housing (1) and located on the outdoor air inlet side of the filter layer (2), and a drive device (4) for driving the cleaning device (3) to reciprocate along the surface of the filter layer (2); the cleaning device (3) includes a cleaning housing (31) slidably connected to the drive device (4), a plurality of impellers (32) provided in the cleaning housing (31), and a cleaning air duct (33) provided on the cleaning housing (31). The cleaning air duct (33) includes an air inlet (331) opened on the side of the cleaning housing (31) facing the filter layer (2) for adhering to the surface of the filter layer (2) to adsorb dust, an air outlet (332) opened on the side of the cleaning housing (31) away from the filter layer (2), and a rotating air duct (333) provided in the cleaning housing (31) for connecting the air inlet (331) and the air outlet (332) and for accommodating the impellers (32).

2. The dust-collecting self-cleaning device for a fresh air system according to claim 1, characterized in that: The drive device (4) includes a drive motor (41) disposed in the cleaning housing (31), a gear (42) disposed on the output end of the drive motor (41), and a rack (43) disposed on the housing (1) and meshing with the gear (42).

3. The dust-collecting self-cleaning device for a fresh air system according to claim 1, characterized in that: It also includes a sliding support mechanism disposed inside the outer casing (1); the sliding support mechanism includes bearing seats (44) symmetrically disposed on both sides of the outer casing (1), a connecting rod (45) rotatably connected to the bearing seats (44) on both sides respectively, a connecting piece (46) fixedly connected to the cleaning housing (31) at one end and sleeved on the connecting rod (45) at the other end, and a bushing (47) sleeved on the connecting rod (45) and fixedly connected to the connecting piece (46).

4. The dust-collecting self-cleaning device for a fresh air system according to claim 3, characterized in that: It also includes a guide structure set inside the housing (1) for guiding the movement of the cleaning device (3); the guide structure includes a slide rail (48) fixedly installed at the bottom of the housing (1), a wheel (49) that can roll along the slide rail (48), and a fixing plate (410) that is rotatably connected to the wheel (49) at one end by a bearing and fixedly connected to the cleaning housing (31) at the other end.

5. The dust-collecting self-cleaning device for a fresh air system according to claim 4, characterized in that: It also includes sensors (5) disposed on both sides of the housing (1) for detecting the movement limit position of the cleaning device (3) and electrically connected to the drive device (4).

6. The dust-collecting self-cleaning device for a fresh air system according to claim 5, characterized in that: The outer casing (1) is also provided with a filter screen located on the outdoor air inlet side of the cleaning device (3) and parallel to the filter layer (2).

7. A dust-collecting self-cleaning device for a fresh air system according to claim 6, characterized in that: The outer casing (1) has an openable side door (6) on one side, and the cleaning casing (31) has a junction box (7) on the side that is electrically connected to the drive motor (41) and the impeller (32).

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