A heating, ventilation, and air conditioning air filter

Abstract

This utility model discloses a heating, ventilation, and air conditioning (HVAC) air filter, relating to the field of HVAC technology. The utility model includes a housing, which internally comprises an air inlet, two airflow channels, two dust discharge ports, and an air outlet. The air outlet is connected to the HVAC air inlet. An exhaust fan is installed in the air outlet. Adjustable plates are rotatably mounted in both the air inlet and outlet. A driving component is provided on the housing to drive the two adjustment plates to rotate synchronously in opposite directions. Dust baffles are slidably mounted in the airflow channels, with a return spring between them. In use, this utility model enables efficient continuous filtration and effective dust removal in tandem. When the dust baffle in one airflow channel is shaking to remove dust, the other airflow channel can take over the filtration operation, ensuring that the exhaust fan does not need to be turned off during the effective dust removal process, thus avoiding a decrease in filtration efficiency due to shutdown for dust removal.

Description

Technical Field

[0001] This utility model relates to the field of HVAC filtration technology, specifically to an HVAC air filter. Background Technology

[0002] Heating, ventilation and air conditioning (HVAC) is an air conditioner with heating, ventilation and air conditioning functions. In HVAC systems, air filters play a vital role. They are key components that ensure air quality, protect system equipment and improve operating efficiency. They can prevent dust and particulate matter from entering the air conditioning unit, avoid equipment wear, blockage, scaling, reduced efficiency, and extend equipment life. They also filter particulate pollutants in outdoor fresh air and return air. Existing patent CN220083255U discloses an air filter for HVAC, which uses a dust removal structure to pre-filter the air entering the housing. The dust removal structure consists of a housing plate, a dust baffle plate, an elastic element, and a pull rope. The pull rope can be pulled by an electric drum. When the electric drum is working, the pull rope moves, pulling the dust baffle plate and causing it to shake back and forth under the action of the elastic element, shaking off the dust adsorbed on it and discharging it through the dust discharge port. This allows the dust baffle plate to be recycled. By setting an exhaust fan and an air guide plate at the rear end of the filter housing, the exhaust fan draws out the air for rapid filtration, while the air guide plate guides the airflow when the filtered air is discharged, making the airflow faster. The above-mentioned patent has certain defects: when the dust baffle shakes back and forth, if the exhaust fan is running, the dust that is shaken off will be re-adsorbed onto the dust baffle due to the wind force, resulting in a significant reduction in the dust removal effect. Conversely, if the exhaust fan is turned off when the dust baffle shakes back and forth, the filtration process will be interrupted, reducing operating efficiency. Therefore, a heating, ventilation and air conditioning air filter is proposed. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problem that when the dust baffle is shaking back and forth, if the exhaust fan is running, the dust that is shaken off will be re-adsorbed onto the dust baffle due to the wind force, resulting in a significant reduction in dust removal efficiency. Conversely, if the exhaust fan is turned off when the dust baffle is shaking back and forth, the filtration process will be interrupted, reducing operating efficiency. This utility model provides a heating, ventilation, and air conditioning air filter.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution: A heating, ventilation, and air conditioning (HVAC) air filter includes a housing. The housing contains an air inlet, two airflow channels, two dust discharge ports, and an air outlet. The air outlet is connected to the HVAC air inlet. An exhaust fan is installed in the air outlet. Adjusting plates are rotatably mounted in both the air inlet and outlet. A driving component is provided on the housing to drive the two adjusting plates to rotate synchronously in opposite directions. Dust baffles are slidably mounted in the airflow channels, with a return spring between them. A driving unit, a filter plate, and a filter core are provided in the airflow channels. The driving unit drives the dust baffles to slide unidirectionally. A sealing component is provided in the dust discharge ports.

[0005] Furthermore, the driving component includes a driving rod and a worm gear that are rotatably mounted on the housing. Two first bevel gears are symmetrically arranged on the driving rod. A second bevel gear that meshes with the first bevel gears is provided on the adjusting plate. A worm wheel that meshes with the worm gear is provided on the driving rod.

[0006] Furthermore, the free end of the adjusting plate is tapered and equipped with a sealing gasket.

[0007] Furthermore, the drive unit includes a drive shaft rotatably disposed within the airflow channel, a drive rack is disposed on the dust baffle plate, and a missing gear is disposed on the drive shaft that meshes with the drive rack.

[0008] Furthermore, a limiting rod is slidably arranged in the airflow channel, and a tension spring is provided between the limiting rod and the housing. The free end of the limiting rod is hemispherical and overlaps with the dust baffle.

[0009] Furthermore, the sealing component includes a sealing plate with a stepped structure that is inserted into and fitted with the ash discharge port, and the sealing plate is provided with a magnetic block that magnetically engages with the housing.

[0010] Furthermore, two sets of positioning blocks are provided in the airflow channel. The filter plate and the filter cotton core are slidably disposed in the airflow channel and respectively abut against and overlap with the two sets of positioning blocks. An inspection port for the filter plate and the filter cotton core to pass through is provided in the airflow channel. An inspection plate with a stepped structure is inserted into the inspection port. A magnetic suction plate that magnetically engages with the housing is provided on the inspection plate.

[0011] Furthermore, both the sealing plate and the inspection plate are constructed with annular grooves, and a sealing ring is fitted inside the annular grooves.

[0012] The beneficial effects of this utility model are as follows: When in use, this utility model can achieve the coordinated operation of efficient continuous filtration and effective dust removal. When the dust baffle in any airflow channel is shaking and removing dust, the other airflow channel can take over the filtration work, ensuring that the exhaust fan does not need to be turned off during the effective dust removal and dust removal process of the dust baffle. This avoids the decrease in filtration efficiency caused by the shutdown for dust removal, and ensures continuous, stable and efficient air handling capabilities, thus making it more practical. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a three-dimensional sectional view of the present invention; Figure 4 This is a utility model Figure 3 Enlarged view of point B in the middle; Figure 5 This is a utility model Figure 3 Enlarged view of point C in the middle; Figure 6 This is a three-dimensional sectional view of the present invention from another perspective; Figure 7 This is a utility model Figure 6 Enlarged view at point D; Figure 8 This is a utility model Figure 6 Enlarged view of point E in the middle.

[0014] Reference numerals: 1. Housing; 2. Air inlet; 3. Airflow channel; 4. Ash discharge port; 5. Air outlet; 6. Exhaust fan; 7. Adjusting plate; 8. Dust baffle plate; 9. Return spring; 10. Filter plate; 11. Filter cotton core; 12. Drive rod; 13. Worm gear; 14. First bevel gear; 15. Second bevel gear; 16. Worm wheel; 17. Sealing gasket; 18. Drive shaft; 19. Drive rack; 20. Missing gear; 21. Limiting rod; 22. Tension spring; 23. Sealing plate; 24. Magnetic block; 25. Positioning block; 26. Inspection port; 27. Inspection plate; 28. Magnetic plate; 29. ​​Annular groove; 30. Sealing ring. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0016] like Figures 1-8As shown in the figure, an embodiment of the present invention discloses a heating, ventilation, and air conditioning (HVAC) air filter, including a housing 1, which is horizontal in orientation. A gas collection hood is fixedly installed at the front end of the housing 1. The housing 1 has an air inlet 2, two airflow channels 3, two dust discharge ports 4, and an air outlet 5. The gas collection hood is connected to the air inlet 2, and the air outlet 5 is connected to the HVAC air inlet. An exhaust fan 6 is installed inside the air outlet 5 and is fixedly installed inside the air outlet 5. Adjusting plates 7 are rotatably installed inside both the air inlet 2 and the air outlet 5. The axis of the adjusting plates 7 is vertical. The housing 1 is provided with... There is a driving component for driving two adjusting plates 7 to rotate synchronously in opposite directions. A dust baffle 8 is slidably arranged in the airflow channel 3 and a return spring 9 is arranged between the two. The dust baffle 8 is vertical and slides in the horizontal direction. The return spring 9 is horizontal. A driving part, a filter plate 10 and a filter cotton core 11 are arranged in the airflow channel 3. The filter plate 10 and the filter cotton core 11 are both vertical and located behind the dust baffle 8. The driving part is used to drive the dust baffle 8 to slide in one direction. A sealing component is arranged in the ash discharge port 4. The ash discharge port 4 is sealed or unsealed by the sealing component. In this embodiment, for ease of understanding, the two airflow channels 3 are named the first channel and the second channel, respectively. In the initial state, both adjusting plates 7 are in their initial positions and together block the first channel. The dust baffle 8 is in its initial position, and the return spring 9 is in its natural state. During use, the exhaust fan 6 is turned on, and the outside air passes through the air collection hood, the air inlet 2, the second channel, and the air outlet 5 in sequence. During this process, the air is pre-filtered by the dust baffle 8 in the second channel, and then further filtered by the filter plate 10 and the filter cotton core 11. Due to the wind resistance, the dust baffle 8 is driven to slide to its limit position, and the return spring 9 is compressed. When the dust adsorbed on the dust baffle 8 reaches a certain amount, the driving component drives the two adjusting plates 7 to rotate synchronously in opposite directions to their extreme positions. The first channel is unobstructed, and the second channel is blocked. At this time, the return spring 9 in the second channel returns to its initial state. The dust baffle 8 returns to its initial state due to its elastic potential energy and shakes back and forth, shaking off the dust adsorbed on it. The dust discharge port 4 is unblocked by the sealing component, and the shaken dust is discharged from the dust discharge port 4. The dust baffle 8 is driven to slide unidirectionally to the limit position by the drive unit, and the return spring 9 is squeezed. After that, the drive is released, and the return spring 9 returns to its natural state. The dust baffle 8 returns to its initial state due to its elastic potential energy and shakes back and forth to increase the shaking amplitude and improve the dust removal effect. The dust baffle 8 can be recycled. The dust discharge port 4 is then blocked by the sealing component. During this process, the outside air passes through the air collection hood, air inlet 2, first channel and air outlet 5 in sequence. The dust baffle 8 in the first channel repeats the above process. In summary, this utility model can achieve the coordinated operation of efficient continuous filtration and effective dust removal. When the dust baffle 8 in any airflow channel 3 is shaking to remove dust, the other airflow channel 3 can take over the filtration work, ensuring that the exhaust fan 6 does not need to be turned off during the dust removal and dust removal process of the dust baffle 8. This avoids the decrease in filtration efficiency caused by the shutdown for dust removal, and ensures continuous, stable and efficient air handling capabilities, thus making it more practical.

[0017] like Figure 2 As shown, the specific structure of the driving component of this utility model is disclosed. The driving component includes a driving rod 12 and a worm gear 13, both of which are rotatably mounted on the housing 1. The axes of the driving rod 12 and the worm gear 13 are both horizontal and vertically distributed. Two first bevel gears 14 are symmetrically arranged on the driving rod 12. The first bevel gears 14 are coaxially fixed on the driving rod 12. A second bevel gear 15 that meshes with the first bevel gears 14 is provided on the adjusting plate 7. The second bevel gear 15 is coaxially fixed on the adjusting plate 7. A worm wheel 16 that meshes with the worm gear 13 is provided on the driving rod 12. The worm wheel 16 is coaxially fixed on the driving rod 12. Referring to the above, when in use, the worm gear 13 is manually driven to rotate, and the worm wheel 16 will rotate due to the meshing action, which will drive the drive rod 12 and the two first bevel gears 14 to rotate together. Since the two first bevel gears 14 are symmetrically arranged, the two second bevel gears 15 will rotate synchronously in opposite directions due to the meshing action, thereby driving the two adjusting plates 7 to rotate synchronously in opposite directions.

[0018] like Figure 5 As shown, a further technical solution of the present invention is disclosed. The free end of the adjusting plate 7 is tapered and is provided with a sealing gasket 17, which is fixed to the free end of the adjusting plate 7. Referring to the above, when the regulating plate 7 blocks the airflow channel 3, the tapered design of the free end can form a surface contact to increase the contact area. Combined with the sealing gasket 17, the sealing effect can be improved.

[0019] like Figure 4 As shown, the specific structure of the drive unit of this utility model is disclosed. The drive unit includes a drive shaft 18 rotatably disposed in the airflow channel 3. The axis of the drive shaft 18 is in the horizontal direction. A drive rack 19 is disposed on the dust baffle 8. The drive rack 19 is in the horizontal direction and fixed on the dust baffle 8. A missing gear 20 that meshes with the drive rack 19 is disposed on the drive shaft 18. The missing gear 20 is coaxially fixed on the drive shaft 18. Referring to the above, in the initial state, the missing gear 20 is not engaged with the drive rack 19. When the dust baffle 8 slides, it drives the drive rack 19 to move together. In use, by manually driving the drive shaft 18 to rotate forward, the missing gear 20 is driven to rotate together. The missing gear 20 first engages with the drive rack 19, and through engagement, it drives the dust baffle 8 to slide to the limit position. Then, the missing gear 20 and the drive rack 19 disengage, and the dust baffle 8 resets due to elastic potential energy, driving the drive rack 19 to move together, so as to achieve unidirectional sliding of the dust baffle 8.

[0020] like Figure 7 As shown, a further technical solution of this utility model is disclosed. A limiting rod 21 is slidably arranged in the airflow channel 3. The limiting rod 21 slides in the vertical direction. A tension spring 22 is arranged between the limiting rod 21 and the housing 1. The tension spring 22 is in the vertical direction and its two ends are fixedly connected to the limiting rod 21 and the housing 1 respectively. The free end of the limiting rod 21 is hemispherical and abuts against the dust baffle 8. The bottom end of the limiting rod 21 is hemispherical. Referring to the above, when the dust baffle 8 is in the initial position, the limiting rod 21 is in the lowest position, and the tension spring 22 is in its natural state. As more and more dust accumulates on the dust baffle 8, the wind resistance will also increase, and the sliding stroke of the dust baffle 8 will increase. At this time, the dust baffle 8 will abut against the bottom end of the limiting rod 21, forcing the limiting rod 21 to slide upward to the highest position. The tension spring 22 will be stretched. The staff can observe the position of the limiting rod 21 to judge the amount of dust accumulated on the dust baffle 8, so as to facilitate subsequent dust removal operations and make it more convenient to use. When the dust baffle 8 is reset, the tension spring 22 returns to its natural state, and the limiting rod 21 slides to the lowest position.

[0021] like Figure 8 As shown, the specific structure of the sealing component of this utility model is disclosed. The sealing component includes a sealing plate 23 with a stepped structure that is inserted and matched with the ash discharge port 4. The sealing plate 23 has a first stepped surface and a second stepped surface connected to each other. The first stepped surface is inserted and matched with the ash discharge port 4, and the second stepped surface is in contact with and overlapped with the shell 1. A magnetic block 24 is provided on the sealing plate 23 and magnetically matched with the shell 1. The magnetic block 24 is fixed on the sealing plate 23. The shell 1 is made of metal, and the magnetic block 24 can magnetically match with the shell 1. Referring to the above, in the initial state, the sealing plate 23 is inserted into the ash discharge port 4 and seals the ash discharge port 4. The magnetic block 24 and the housing 1 are magnetically attracted to each other. When in use, the sealing plate 23 is removed from the ash discharge port 4 and the magnetic block 24 is moved away from the housing 1, so that the ash discharge port 4 can be unsealed. Conversely, the sealing plate 23 is reinserted into the ash discharge port 4 and the magnetic block 24 is magnetically attracted to the housing 1 again, so that the ash discharge port 4 can be resealed.

[0022] like Figures 3-4As shown, a further technical solution of this utility model is disclosed. Two sets of positioning blocks 25 are provided in the airflow channel 3. Each set of positioning blocks 25 consists of two blocks and is symmetrically spaced. The positioning blocks 25 are fixed in the airflow channel 3. The filter plate 10 and the filter cotton core 11 are slidably disposed in the airflow channel 3 and respectively abut against and overlap with the two sets of positioning blocks 25. The filter plate 10 and the filter cotton core 11 slide in the horizontal direction. An inspection port 26 is provided in the airflow channel 3 for the filter plate 10 and the filter cotton core 11 to pass through. An inspection plate 27 with a stepped structure is inserted into the inspection port 26. The inspection plate 27 has a first stepped surface and a second stepped surface connected. The first stepped surface is inserted into the inspection port 26 and the second stepped surface abuts against and overlaps with the shell 1. A magnetic suction plate 28 is provided on the inspection plate 27 and magnetically attaches to the shell 1. The magnetic suction plate 28 is fixed on the shell 1. Referring to the above, in the initial state, the inspection plate 27 is inserted into the inspection port 26 and blocks the inspection port 26. The magnetic suction plate 28 and the housing 1 are magnetically attracted. The filter plate 10 and the filter cotton core 11 are both located in the airflow channel 3 and are respectively in contact with the two sets of positioning blocks 25. In use, the filter plate 10 and the filter cotton core 11 can be removed by removing the inspection plate 27 from the inspection port 26 and moving the magnetic suction plate 28 away from the housing 1, so that the filter plate 10 and the filter cotton core 11 can be slid out of the airflow channel 3 and away from the two sets of positioning blocks 25. Then, the new filter plate 10 and the filter cotton core 11 can be slid until they are fully inserted into the airflow channel 3 and are respectively in contact with the two sets of positioning blocks 25. Then, the inspection plate 27 can be reinserted into the inspection port 26, and the magnetic suction plate 28 can be magnetically attracted to the housing 1 again, so that the filter plate 10 and the filter cotton core 11 can be removed and replaced.

[0023] like Figure 8 As shown, a further technical solution of this utility model is disclosed. Both the sealing plate 23 and the inspection plate 27 are constructed with annular grooves 29, and a sealing ring 30 is installed in the annular grooves 29. Referring to the above, when the sealing plate 23 blocks the ash discharge port 4 and the inspection plate 27 blocks the inspection port 26, the sealing ring 30 will deform in the annular groove 29 and achieve a sealing effect, thereby improving the overall sealing performance.

[0024] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating, ventilation, and air conditioning (HVAC) air filter, characterized in that, The device includes a housing (1), which has an air inlet (2), two airflow channels (3), two dust discharge ports (4) and an air outlet (5). The air outlet (5) is connected to the HVAC air inlet. An exhaust fan (6) is installed in the air outlet (5). Adjustment plates (7) are rotatably installed in both the air inlet (2) and the air outlet (5). A drive unit is provided on the housing (1) to drive the two adjustment plates (7) to rotate synchronously in opposite directions. A dust baffle (8) is slidably installed in the airflow channel (3) and a reset spring (9) is provided between them. A drive unit, a filter plate (10) and a filter cotton core (11) are provided in the airflow channel (3). The drive unit is used to drive the dust baffle (8) to slide in one direction. A sealing component is provided in the dust discharge port (4).

2. The HVAC air filter according to claim 1, characterized in that, The driving component includes a driving rod (12) and a worm gear (13) that are rotatably mounted on the housing (1). Two first bevel gears (14) are symmetrically arranged on the driving rod (12). A second bevel gear (15) that meshes with the first bevel gears (14) is provided on the adjusting plate (7). A worm wheel (16) that meshes with the worm gear (13) is provided on the driving rod (12).

3. The HVAC air filter according to claim 1, characterized in that, The free end of the adjusting plate (7) is tapered and is provided with a sealing gasket (17).

4. The HVAC air filter according to claim 1, characterized in that, The drive unit includes a drive shaft (18) rotatably disposed in the airflow channel (3), a drive rack (19) is provided on the dust baffle (8), and a missing gear (20) that meshes with the drive rack (19) is provided on the drive shaft (18).

5. The HVAC air filter according to claim 1, characterized in that, A limiting rod (21) is slidably provided in the airflow channel (3). A tension spring (22) is provided between the limiting rod (21) and the housing (1). The free end of the limiting rod (21) is hemispherical and abuts against the dust baffle (8).

6. The HVAC air filter according to claim 1, characterized in that, The sealing component includes a sealing plate (23) with a stepped structure that is inserted into the ash discharge port (4), and a magnetic block (24) is provided on the sealing plate (23) that magnetically engages with the housing (1).

7. The HVAC air filter according to claim 6, characterized in that, Two sets of positioning blocks (25) are provided in the airflow channel (3). The filter plate (10) and the filter cotton core (11) are slidably disposed in the airflow channel (3) and respectively abut against the two sets of positioning blocks (25). An inspection port (26) for the filter plate (10) and the filter cotton core (11) to pass through is provided in the airflow channel (3). An inspection plate (27) with a stepped structure is inserted into the inspection port (26). A magnetic plate (28) that magnetically attaches with the shell (1) is provided on the inspection plate (27).

8. The HVAC air filter according to claim 7, characterized in that, Both the sealing plate (23) and the inspection plate (27) are constructed with annular grooves (29), and a sealing ring (30) is fitted inside the annular grooves (29).

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