A detachable filter structure for air purification

Abstract

The present invention relates to the field of air purification, and specifically to a detachable filtering structure for air purification, comprising a ventilation hood, a fixed seat is arranged inside the ventilation hood, a ventilation pipe is connected to the top of the ventilation hood through a connecting pipe, a driving motor is installed on the top of the fixed seat, a rotating column is installed at the output end of the driving motor, a reduction unit is arranged on the top of the rotating column, a support plate is installed through the outer side of the reduction unit, a rotation limiting mechanism is arranged between the support plate and the fixed seat, connecting plates are installed at both ends of the support plate, a filter shell is clamped with a mounting sleeve on the connecting plate, a self-cleaning mechanism is arranged between the filter shell and the mounting sleeve, a filter unit is arranged inside the filter shell, and a self-sealing mechanism is arranged between the top of the filter shell and the connecting pipe. The present invention can perform various targeted filtering operations on the air passing through the connecting pipe by continuously switching the filter shell connected to the connecting pipe and the corresponding filter unit, thereby ensuring the air filtering effect.

Description

Technical Field

[0001] The invention relates to the technical field of air purification, in particular to a detachable filter structure for air purification. Background Art

[0002] Air purifiers and filters are widely used to remove foreign matter from the air, which may include pollen, dander, smoke, pollution, dust, etc. In addition, air purification devices can be used to circulate indoor air, including fresh air replacement in many places such as homes, offices, workshops, etc.

[0003] The existing Chinese invention patent with publication number CN109069971B discloses an air purifier, which can be easily disassembled and the filter is easy to install and disassemble, so that the replacement or disassembly of the filter inside the air purifier becomes simple. The invention provides an air purifier that can be started by touching a switch. The invention provides an air purifier with a structure that is simple to assemble and can reduce the occurrence of malfunctions. However, the type of filter element is fixed and difficult to replace, resulting in a single type of impurities in the air purification during use, and the use scenarios are easily limited.

[0004] The existing Chinese invention patent with publication number CN105056645B discloses an air purification device that is easy to replace the filter. A spare filter material storage part is set by utilizing the transverse ribs that fix the filter body in place and the airtight part that connects the fixed cover body. In this part, the filter material is covered and prevented from being blocked. When the filter material in the spare part needs to be moved out, the filter cylinder that cooperates with the thread can be rotated to move up and down, so that the filter material that has been adsorbed with dust can be moved to the spare storage part, and the unused filter material originally in the storage part can be moved out and put into working state. Although it achieves the effect of quickly replacing the filter, in the overall fresh air ventilation filtration process, the purification and filtration of the simple filter cannot meet the air purification needs for odors, harmful gases, fine particles in the air, and harmful substances such as viruses and bacteria in the air. At present, the overall filter structure is inconvenient to replace and disassemble, and during long-term use, the overall purification device itself will be attached with impurities such as particulate dust, which will escape into the air and affect the air quality at will.

[0005] In view of this situation, the present invention provides a filter structure for air purification, which can switch different filter elements according to air purification needs, meet air purification needs, increase the use range of the purification structure, and facilitate disassembly and cleaning of impurities attached to the purification device itself. Summary of the invention

[0006] In response to the above problems, the present application provides a detachable filter structure for air purification, which solves the problem mentioned in the above background technology of conveniently switching filter elements for filtration according to different air purification needs, improves the use range of the purification structure, and facilitates the disassembly and cleaning of impurities attached to the purification device itself.

[0007] The technical solution of the present invention is: a detachable filter structure for air purification, including a ventilation hood, a fixed seat is arranged inside the ventilation hood, a ventilation pipe is connected to the top of the ventilation hood through a connecting pipe, a driving motor is installed on the top of the fixing seat, a rotating column is installed at the output end of the driving motor, a reduction unit is arranged on the top of the rotating column, a support plate is installed through the outer side of the reduction unit, a rotation limiting mechanism is arranged between the support plate and the fixed seat, connecting plates are installed at both ends of the support plate, a filter housing is connected with the connecting plate through a mounting sleeve, a self-cleaning mechanism is arranged between the filter housing and the mounting sleeve, a filter unit is arranged inside the filter housing, and a self-closing mechanism is arranged between the top of the filter housing and the connecting pipe, wherein: the reduction unit is arranged to reduce the speed of the rotation of the rotating column; the rotation limiting mechanism is arranged to improve the rotation stability of the support plate and limit the rotation angle of the support plate; the self-cleaning mechanism is transferred to automatically clean the outside of the filter housing during the switching process of the filter housing; the self-closing mechanism is arranged to make the filter housing and the connecting pipe tightly connected to prevent the leakage of unfiltered gas during air filtering.

[0008] Preferably, the reduction unit includes a reinforcement plate, a transmission shaft, a transmission gear and a planetary gear plate, the transmission shaft is installed on the top of the rotating column, the transmission gear is installed on the top of the transmission shaft, the reinforcement plate is installed on the outer wall of the top of the rotating column, and the planetary gear plate is installed on the top of the reinforcement plate, and the transmission shaft extends into the interior of the planetary gear plate, and the transmission gear is meshed with the internal gear of the planetary gear plate.

[0009] Preferably, the cross-sectional dimension of the reinforcement plate is the same as that of the planetary gear plate, and the top of the side wall of the reinforcement plate is rotatably connected to the bottom side wall of the planetary gear plate.

[0010] Preferably, the rotation limiting mechanism includes a rotation groove, a sliding seat, a fixed column, a limiting plate, a fixed sleeve, a rotating ring, a limiting groove, a movable ring and a connecting rod. The rotation groove is opened on the fixed seat, the sliding seat is slidably arranged inside the rotation groove, one end of the fixed column is arranged on the sliding seat, and the other end is arranged on the support plate, the rotating ring is threadedly sleeved on the fixed column, the fixed sleeve is rotatably sleeved on the outside of the rotating ring, the connecting rod is installed on the outside of the fixed sleeve, and the movable ring is installed between the ends of the connecting rod away from the fixed sleeve, the movable ring and the rotating column are slidably connected, and the limiting plate is installed at two opposite ends of the fixed column.

[0011] Preferably, the cross-section of the rotating ring is I-shaped, and the fixed sleeve is sleeved inside the I-shaped groove of the rotating ring. Multiple limit grooves are opened on both side walls of the rotating ring along the circumferential direction, and limit blocks are installed on the side walls opposite to the limit plate and the rotating ring along the circumferential direction. The positions of the limit grooves and the limit blocks correspond to each other, and rubber pads are bonded to the side walls opposite to the limit plate and the rotating ring.

[0012] Preferably, the self-cleaning mechanism includes a conveyor belt, a gear ring, a baffle, a limit plate and a gear column. The gear column is installed on the top of the fixed column, and the limit plate is installed on the top of the gear column. The gear ring is installed on the outside of the filter housing, and the conveyor belt is wrapped around the filter housing and the gear column at both ends of the connecting plate, and the gear column is located on the outside of the conveyor belt. Tooth columns are safely arranged on both sides of the conveyor belt along the length, and the conveyor belt is in an inward tensioned state. The baffle is installed at the bottom of one side of the mounting sleeve, a sponge pad is installed at the bottom of the baffle, and the bottom of the baffle is tangent to the outer wall of the filter housing.

[0013] Preferably, the sliding seat is an arc-shaped block, and both side walls of the rotating groove are equipped with snap rings, the snap rings are arc-shaped rings, and the snap rings slide through the two side walls opposite to the snap rings.

[0014] Preferably, the self-sealing mechanism includes a guide ring, a sealing groove, a fixing ring, an adjusting groove, an adjusting ring, a guide plate and a spring. The fixing ring is installed on the top of the filter housing, and the adjusting groove is opened on the top of the fixing ring. The adjusting ring is clamped inside the adjusting groove. One end of the spring is installed on the bottom of the adjusting ring and the other end is installed on the bottom of the adjusting groove groove. The guide ring is installed on the outside of the bottom of the connecting pipe, and the sealing groove is opened on the side wall of the bottom of the connecting pipe, and the guide plate is installed on both side walls of the sealing groove. The cross-sections of the guide ring and the guide plate are both wedge-shaped.

[0015] Preferably, in the initial state, the fixing ring is tangent to the bottom side wall of the connecting tube, and when the spring is in a balanced state, the height of the adjusting ring exceeds the height of the fixing ring, so that the adjusting ring extends into the connecting tube, and the depth of the adjusting groove is greater than the height of the adjusting ring.

[0016] Preferably, the outer wall of the adjustment ring is provided with a plurality of stop grooves along the circumferential direction, and a plurality of stop blocks are installed circumferentially above the inner wall of the adjustment groove, the positions of the stop blocks correspond to the positions of the stop grooves, the stop grooves do not penetrate the outer wall of the adjustment ring, and the stop blocks extend into the corresponding stop grooves.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) The detachable air purification filter structure described in the present invention completes the installation of the driving motor and the rotating column by means of a fixed seat arranged inside the ventilation hood, and drives the transmission shaft and the transmission gear to be connected to the planetary gear plate through the rotating column, so that the rotation of the rotating column can be converted into the rotation of the filter housing after reducing the rotation speed, so that there is a difference between the rotation speeds of the filter housing and the rotating column, and finally the rotation of the rotating column can drive the limit plate and the rotating ring to move up and down along the rotating column until the rotating ring conflicts with the limit plates on both ends of the fixed column, so that the position of the moving ring can be limited, thereby completing the adjustment of the device. The arrangement of the rotating column, the fixed column and the moving ring not only facilitates the subsequent disassembly of the device, but also reduces the difficulty of replacing the filter housing, facilitates the switching of the filter structure, and facilitates the selection and replacement of the appropriate filter structure according to different air pollutants, thereby improving the purification effect. Compared with the prior art, it is not only convenient to switch the filter housing, but also the structure of the ventilation hood and the filter housing is more convenient to disassemble than the comparative document.

[0019] (2) In the detachable filter structure for air purification described in the present invention, when the filter housing gradually contacts the connecting pipe, the guide ring gradually retracts the adjustment ring into the adjustment groove. When the filter housing is adjusted into place, the spring rebounds the adjustment ring so that the adjustment ring extends into the sealing groove, so that a sealed space is formed between the connecting pipe and the filter housing to achieve a sealing effect during air purification. This structure also simplifies the process of forming a sealed environment and reduces the difficulty of adjusting the device. In addition, through the setting of the self-cleaning mechanism, during the switching adjustment process of the filter housing, the relative rotation between the filter housing and the baffle can clean the dust and impurities attached to the outside of the filter housing, thereby maintaining the air purification effect of the air purification mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of the ventilation hood provided by the present invention;

[0023] Figure 3 A schematic diagram of the overall structure of the filter housing provided by the present invention;

[0024] Figure 4 A schematic diagram of the explosion structure of the filter housing provided by the present invention;

[0025] Figure 5 A schematic diagram of the internal cross-sectional structure of the filter housing provided by the present invention;

[0026] Figure 6 A schematic diagram of a cross-sectional structure of an adjustment ring provided by the present invention;

[0027] Figure 7 A schematic diagram of the structure of the rotation limiting mechanism provided by the present invention;

[0028] Figure 8 A schematic diagram of the explosion structure of the planetary gear disc provided by the present invention;

[0029] Fig. 9 A schematic diagram of the structure of the fixed column provided by the present invention;

[0030] Fig.10 A schematic diagram of the cross-sectional structure of a fixing column provided by the present invention;

[0031] Fig.11 for Fig.10 The enlarged structural diagram at A in the middle;

[0032] Fig.12 A schematic diagram of the bottom structure of the connecting pipe provided by the present invention;

[0033] Fig.13 A schematic diagram of the cross-sectional structure of the connecting pipe provided by the present invention;

[0034] Fig.14 A schematic diagram of the side view of the connection structure between the connecting pipe and the filter housing provided by the present invention;

[0035] Fig.15 for Figure 3 Enlarged structural diagram at B in the middle.

[0036] In the figure: 1, ventilation hood; 2, ventilation pipe; 3, connecting pipe; 4, fixing seat; 5, connecting plate; 6, filter housing; 7, fixing ring; 8, support plate; 9, fixing column; 10, adjusting ring; 11, stop groove; 12, spring; 13, mounting sleeve; 14, rotating groove; 16, rotating column; 17, moving ring; 18, connecting rod; 19, speed reduction unit; 20, limit plate; 21, fixing sleeve; 22, rotating ring; 23 , limit groove; 24, limit block; 25, sliding seat; 26, snap ring; 27, guide ring; 28, sealing groove; 29, stop block; 30, adjustment groove; 31, drive motor; 32, guide plate; 33, filter unit; 34, reinforcement plate; 35, transmission shaft; 36, transmission gear; 37, planetary gear plate; 38, conveyor belt; 39, gear ring; 40, limit plate; 41, gear column; 42, baffle. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0038] Example:

[0039] like Figure 1-Figure 15 As shown, the embodiment of the present invention provides a detachable air purification filter structure, including a ventilation hood 1, the side walls of the ventilation hood 1 are all snap-fit ​​structures, and the partitions are all provided with grilles, a fixed seat 4 is arranged inside the ventilation hood 1, and the top of the ventilation hood 1 is connected to the ventilation pipe 2 through a connecting pipe 3, which is convenient for fresh air transmission, a driving motor 31 is installed on the top of the fixing seat 4, a rotating column 16 is installed on the output end of the driving motor 31, a speed reduction unit 19 is arranged on the top of the rotating column 16, a support plate 8 is installed through the outer side of the speed reduction unit 19, a rotation limiting mechanism is arranged between the support plate 8 and the fixing seat 4, and both ends of the support plate 8 are installed There is a connecting plate 5, and a filter shell 6 is clamped between the two ends of the connecting plate 5 through an installation sleeve 13. A self-cleaning mechanism is arranged between the filter shell 6 and the installation sleeve 13. During the switching process of the filter shell 6, the outside of the filter shell 6 is automatically cleaned. A filter unit 33 is arranged inside the filter shell 6. The filter unit 33 can be set to different materials to target different filtering environments or usage scenarios. Users can use different filter units 33 according to their own filtering needs, and can also use them in combination to achieve the purpose of being able to switch different filtering scenarios. A self-closing mechanism is arranged between the top of the filter shell 6 and the connecting pipe 3.

[0040] In this embodiment, the reduction unit 19 includes a reinforcement plate 34, a transmission shaft 35, a transmission gear 36 and a planetary gear plate 37. The transmission shaft 35 is installed on the top of the rotating column 16, the transmission gear 36 is installed on the top of the transmission shaft 35, the reinforcement plate 34 is installed on the outer wall of the top of the rotating column 16, and the planetary gear plate 37 is installed on the top of the reinforcement plate 34. The planetary gear plate 37 passes through the support plate 8, and the transmission shaft 35 extends into the interior of the planetary gear plate 37, and the transmission gear 36 is meshed with the internal gear of the planetary gear plate 37. The transmission shaft 35 is driven to rotate through the rotating column 16, and then the transmission gear 36 and the internal gear of the planetary gear plate 37 are driven to rotate, and then the support plate 8 is driven to rotate synchronously with the planetary gear plate 37, and the speed is reduced compared to the rotation speed of the rotating column 16, which can reduce the speed of the rotation of the rotating column 16, match the overall adjustment speed of the device, and improve the practicality of the device.

[0041] Specifically, the cross-sectional dimensions of the reinforcement plate 34 are the same as those of the planetary gear plate 37 , and the top of the side wall of the reinforcement plate 34 is rotatably connected to the bottom side wall of the planetary gear plate 37 , ensuring a stable transmission process.

[0042] In this embodiment, the rotation limiting mechanism includes a rotation groove 14, a sliding seat 25, a fixed column 9, a limiting plate 20, a fixed sleeve 21, a rotating ring 22, a limiting groove 23, a movable ring 17 and a connecting rod 18. The rotation groove 14 is opened on the fixed seat 4, and the sliding seat 25 is slidably arranged inside the rotation groove 14. One end of the fixed column 9 is arranged on the sliding seat 25 and the other end is arranged on the support plate 8. A self-cleaning mechanism is arranged between the top of the fixed column 9 and the filter housing 6. The rotating ring 22 is threadedly sleeved on the fixed column 9, and the fixed sleeve 21 is rotatably sleeved on the outside of the rotating ring 22. The connecting rod 18 is installed on the outside of the fixed sleeve 21, and the movable ring 17 is installed between the end of the connecting rod 18 away from the fixed sleeve 21. The movable ring 17 and the rotating column 16 are slidably connected, and the limiting plate 20 is installed at the opposite ends of the fixed column 9. When 16 rotates, it drives the moving ring 17 to have a synchronous rotation trend. Since the moving ring 17 is connected to the fixed sleeve 21 through the connecting rod 18, the rotation of the rotating column 16 is converted into driving the moving ring 17 to move up and down along the rotating column 16. The moving ring 17 rises and drives the fixed sleeve 21 to rise synchronously, and is used to connect the rotating ring 22 with the fixed column 9 by thread. At this time, the fixed sleeve 21 rises and drives the rotating ring 22 to rotate synchronously until the fixed sleeve 21 is connected with the limit plate 20. At this time, the fixed sleeve 21 stops rising, the rotating ring 22 stops rotating, the moving ring 17 stops rising, and the rotating column 16 stops rotating. At this time, the filter housing 6 is switched and is just connected to the bottom of the connecting pipe 3, which improves the rotation stability of the support plate 8, limits the rotation angle of the support plate 8, supports the support plate 8, and improves the movement stability of the support plate 8.

[0043] Specifically, the cross-section of the rotating ring 22 is I-shaped, and the fixed sleeve 21 is sleeved inside the I-shaped groove of the rotating ring 22. A plurality of limit grooves 23 are opened on both side walls of the rotating ring 22 along the circumferential direction, and limit blocks 24 are installed on the side walls opposite to the limit plate 20 and the rotating ring 22 along the circumferential direction. When the rotating ring 22 is connected to the limit plate 20, the limit blocks 24 are connected to the limit grooves 23 to improve the friction of the limit plate 20. The positions of the limit grooves 23 and the limit blocks 24 correspond to each other, and rubber pads are bonded to the side walls opposite to the limit plate 20 and the rotating ring 22 to improve the friction stability between the limit plate 20 and the rotating ring 22, so that the limiting of the limit plate 20 and the rotating ring 22 is stable.

[0044] Specifically, the self-cleaning mechanism includes a conveyor belt 38, a gear ring 39, a baffle 42, a limit plate 40 and a gear column 41. The gear column 41 is installed on the top of the fixed column 9, and the limit plate 40 is installed on the top of the gear column 41. The gear ring 39 is installed on the outside of the filter housing 6, and the conveyor belt 38 is connected between the filter housing 6 and the gear column 41 at both ends of the connecting plate 5, and the gear column 41 is located on the outside of the conveyor belt 38. Tooth columns are safely provided on both sides of the conveyor belt 38 along the length, and the conveyor belt 38 is in an inward tensioned state. The baffle 42 is installed on the bottom of one side of the mounting sleeve 13. At this time, as the fixed column 9 rotates, the gear column 41 is driven to rotate synchronously and then drive the conveyor belt 38 to rotate. The conveyor belt 38 drives the filter housing 6 to rotate around the mounting sleeve 13 by meshing with the gear ring 39, and then the impurities on the surface of the filter housing 6 are removed through the baffle 42, so as to realize the cleaning operation of the filter housing 6 itself, so as to keep the filter itself clean during the overall fresh air filtering.

[0045] Specifically, the sliding seat 25 is an arc-shaped block, and both side walls of the rotating groove 14 are installed with snap rings 26. The snap rings 26 are arc-shaped rings, and the snap rings 26 slide through the two opposite side walls of the snap rings 26. The snap rings 26 are used to improve the sliding stability of the sliding seat 25 and prevent the sliding seat 25 from escaping from the rotating groove 14.

[0046] In this embodiment, the self-sealing mechanism includes a guide ring 27, a sealing groove 28, a fixing ring 7, an adjusting groove 30, an adjusting ring 10, a guide plate 32 and a spring 12. The fixing ring 7 is mounted on the top of the filter housing 6, and the adjusting groove 30 is opened on the top of the fixing ring 7. The adjusting ring 10 is clamped in the adjusting groove 30. One end of the spring 12 is mounted on the bottom of the adjusting ring 10 and the other end is mounted on the bottom of the groove of the adjusting groove 30. The guide ring 27 is mounted on the outside of the bottom of the connecting pipe 3, and the sealing groove 28 is opened on the side wall of the bottom of the connecting pipe 3, and the guide plate 32 is mounted on the two side walls of the sealing groove 28. The cross-sections of the guide ring 27 and the guide plate 32 are both wedge-shaped. By utilizing the wedge-shaped structure of the guide ring 27 and the guide plate 32, the position adjustment of the adjusting ring 10 can be squeezed when the filter housing 6 moves, so that the connection sealing between the filter housing 6 and the connecting pipe 3 is improved, so that the filter housing 6 and the connecting pipe 3 are tightly connected, preventing the leakage of unfiltered gas during air filtering, improving the sealing during gas purification, and ensuring the air purification effect.

[0047] Specifically, in the initial state, the fixing ring 7 is tangent to the bottom side wall of the connecting tube 3, and when the spring 12 is in a balanced state, the height of the adjusting ring 10 exceeds the height of the fixing ring 7. At this time, the adjusting ring 10 can extend into the connecting tube 3, and the depth of the adjusting groove 30 is greater than the height of the adjusting ring 10, ensuring that the position of the adjusting ring 10 can be adjusted normally.

[0048] Specifically, a plurality of stop grooves 11 are circumferentially formed on the outer wall of the adjustment ring 10, and a plurality of stop blocks 29 are circumferentially installed above the inner wall of the adjustment groove 30. The position of the stop block 29 corresponds to the position of the stop groove 11, and the stop groove 11 does not penetrate the outer wall of the adjustment ring 10, and the stop block 29 extends into the corresponding stop groove 11. The stop block 29 prevents the adjustment ring 10 from detaching from the adjustment groove 30, thereby improving the practicability of the device.

[0049] Specific working principle: The drive motor 31 and the rotating column 16 are installed by the fixed seat 4 set inside the ventilation hood 1, and the rotating column 16 drives the transmission shaft 35 and the transmission gear 36 to be connected with the planetary gear plate 37, so that the rotation of the rotating column 16 can be converted into the rotation of the filter housing 6 after reducing the speed, thereby reducing the speed of the filter housing 6. When the drive motor 31 rotates forward, the rotating column 16 rotates forward, and the speed of the filter housing 6 is the same as the speed of the fixed column 9. At the same time, due to the difference in speed between the filter housing 6 and the rotating column 16, the two sides of the moving ring 17 are connected to the fixed sleeve 21 by the connecting rod 18, so that the moving ring 17 cannot follow the rotating column 16 rotates synchronously, so that the rotation of the rotating column 16 drives the moving ring 17 to move up and down along the rotating column 16, and at the same time, drives the fixed sleeve 21 to move up and down along the fixed column 9, and because the rotating ring 22 is threadedly connected to the fixed column 9, the fixed sleeve 21 rises and drives the rotating ring 22 to rotate up or down around the fixed column 9 until the fixed sleeve 21 is connected to the limit plate 20, and at this time the rotating ring 22 stops moving on the fixed column 9, thereby limiting the displacement of the moving ring 17 on the rotating column 16 in the reverse direction, so that the moving ring 17 stops moving up and down along the fixed column 9 along the rotating column 16, and the rotating column 16 stops rotating at this time, and at the same time, the driving motor 31 stops The filter housing 6 is operated, and the position switching of the filter housing 6 arranged on the rotating column 16 is completed at this time, so that different filter units 33 are adopted for different air pollutants to achieve the purpose of obtaining the best purification effect. Moreover, through the setting of the deceleration unit 19, the rotation speed of the driving motor 31 is decelerated to drive the support plate 8 and the filter housing 6 to rotate, so that the filter housing 6 is more smoothly replaced during the overall replacement process. At the same time, the fixed column 9 rotates with the support plate 8 throughout the whole process, and can support the support plate 8, thereby reducing the movement noise generated by the rotation inertia of the support plate 8 and the fixed column 9, making the replacement process of the filter housing 6 more stable, reducing the generation of noise, and being more in line with the overall purification of modern fresh air ventilation. In order to achieve the goal of air and silence, the rotation of the fixed column 9 drives the gear column 41 to rotate synchronously and then drives the conveyor belt 38 to rotate. The conveyor belt 38 drives the filter housing 6 to rotate around the mounting sleeve 13 by meshing with the gear ring 39, and then the impurities on the surface of the filter housing 6 are cleared through the baffle 42, which can realize the cleaning operation of the filter housing 6 itself, prevent dust and other particulate impurities from adhering to and accumulating on the outside of the filter housing 6, and prevent them from escaping into the air and affecting the fresh air purification effect, which is more conducive to the demand for fresh air ventilation. Compared with the prior art, it is not only convenient to switch the filter housing 6, but also the structure of the ventilation hood 1 and the filter housing 6 is more convenient to disassemble than the referenced comparative document.

[0050] When it is necessary to switch the filter housing 6 connected to the ventilation pipe 2 again, the reverse driving motor 31 can reverse the rotating column 16, drive the moving ring 17 to move in the opposite direction, and the moving ring 17 drives the fixing sleeve 21 and the rotating ring 22 to move in the opposite direction along the fixing column 9 until the rotating ring 22 is connected to the limit plate 20 at the other end of the fixing column 9 and stops moving. At this time, the filter housing 6 is adjusted again, and the driving motor 31 stops fixing, and the rotating column 16 stops rotating. At this time, the filter housing 6 is switched and is just connected to the bottom of the connecting pipe 3, and the filter housing 6 is gradually connected to the connecting pipe 3. During the contact process of the connecting pipe 3, the guide ring 27 gradually retracts the adjusting ring 10 into the adjusting groove 30. When the filter housing 6 is adjusted into place, the spring 12 rebounds the adjusting ring 10 so that the adjusting ring 10 extends into the sealing groove 28. At this time, the connection between the bottom of the connecting pipe 3 and the top of the filter housing 6 is completed, forming a seal between the connecting pipe 3 and the filter housing 6, completing the sealing adjustment during air purification, and conveniently completing the sealing adjustment. It is not only convenient to switch the filter housing 6 with different filter elements, but also the structure of the ventilation hood 1 and the filter housing 6 is more convenient to disassemble than the referenced comparative document.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detachable air purification filter structure, comprising a ventilation hood (1), a fixing seat (4) is arranged inside the ventilation hood (1), and the top of the ventilation hood (1) is connected to a ventilation pipe (2) through a connecting pipe (3), characterized in that: A driving motor (31) is mounted on the top of the fixed seat (4), a rotating column (16) is mounted on the output end of the driving motor (31), a speed reduction unit (19) is arranged on the top of the rotating column (16), a support plate (8) is installed through the outside of the speed reduction unit (19), a rotation limiting mechanism is arranged between the support plate (8) and the fixed seat (4), connecting plates (5) are mounted on both ends of the support plate (8), a filter housing (6) is clamped on the connecting plate (5) through a mounting sleeve (13), a self-cleaning mechanism is arranged between the filter housing (6) and the mounting sleeve (13), a filter unit (33) is arranged inside the filter housing (6), and a self-sealing mechanism is arranged between the top of the filter housing (6) and the connecting pipe (3), wherein: A reduction unit (19) is configured to reduce the speed of the rotation of the rotating column (16); the reduction unit (19) comprises a reinforcement plate (34), a transmission shaft (35), a transmission gear (36) and a planetary gear plate (37); the transmission shaft (35) is mounted on the top of the rotating column (16); the transmission gear (36) is mounted on the top of the transmission shaft (35); the reinforcement plate (34) is mounted on the outer side wall of the top of the rotating column (16); the planetary gear plate (37) is mounted on the top of the reinforcement plate (34); the transmission shaft (35) extends into the interior of the planetary gear plate (37); and the transmission gear (36) meshes with the internal gear of the planetary gear plate (37); A rotation limiting mechanism is provided, which is assembled to enhance the rotation stability of the support plate (8) and to limit the rotation angle of the support plate (8); the rotation limiting mechanism comprises a rotation groove (14), a sliding seat (25), a fixed column (9), a limiting plate (20), a fixed sleeve (21), a rotation ring (22), a limiting groove (23), a movable ring (17) and a connecting rod (18); the rotation groove (14) is provided on the fixed seat (4); the sliding seat (25) is slidably arranged inside the rotation groove (14); the fixed column (9) One end is arranged on the sliding seat (25), and the other end is arranged on the support plate (8); the rotating ring (22) is threadedly sleeved on the fixed column (9); the fixed sleeve (21) is rotatably sleeved on the outside of the rotating ring (22); the connecting rod (18) is installed on the outside of the fixed sleeve (21); and the moving ring (17) is installed between the ends of the connecting rod (18) away from the fixed sleeve (21); the moving ring (17) and the rotating column (16) are slidably connected, and the limit plates (20) are installed at opposite ends of the fixed column (9); A self-cleaning mechanism is adapted to automatically clean the outside of the filter housing (6) during the switching process of the filter housing (6); the self-cleaning mechanism comprises a conveyor belt (38), a gear ring (39), a baffle (42), a limit plate (40) and a gear column (41); the gear column (41) is mounted on the top of the fixing column (9), and the limit plate (40) is mounted on the top of the gear column (41); the gear ring (39) is mounted on the outside of the filter housing (6); the conveyor belt (38) is wound around the filter housing (6) and the gear column (41) at both ends of the connecting plate (5), and the gear column (41) is located on the outside of the conveyor belt (38); tooth columns are arranged on both sides of the conveyor belt (38) along the length, and the conveyor belt (38) is in an inwardly tensioned state; the baffle (42) is mounted on the bottom of one side of the mounting sleeve (13), a sponge pad is mounted on the bottom of the baffle (42), and the bottom of the baffle (42) is tangent to the outer wall of the filter housing (6); A self-sealing mechanism is assembled so that the filter housing (6) and the connecting pipe (3) are tightly connected to prevent leakage of unfiltered gas during air filtering; the self-sealing mechanism comprises a guide ring (27), a sealing groove (28), a fixing ring (7), an adjustment groove (30), an adjustment ring (10), a guide plate (32) and a spring (12); the fixing ring (7) is mounted on the top of the filter housing (6), and the adjustment groove (30) is opened on the top of the fixing ring (7); the adjustment ring (10) is clamped inside the adjustment groove (30); one end of the spring (12) is mounted on the bottom of the adjustment ring (10) and the other end is mounted on the bottom of the groove of the adjustment groove (30); the guide ring (27) is mounted on the outside of the bottom of the connecting pipe (3), and the sealing groove (28) is opened on the side wall of the bottom of the connecting pipe (3); the guide plate (32) is mounted on the side walls of the sealing groove (28); and the cross-sections of the guide ring (27) and the guide plate (32) are both wedge-shaped.

2. The detachable air purification filter structure according to claim 1, characterized in that: The cross-sectional dimensions of the reinforcement plate (34) are the same as those of the planetary gear plate (37), and the top of the side wall of the reinforcement plate (34) is rotatably connected to the bottom side wall of the planetary gear plate (37).

3. The detachable air purification filter structure according to claim 1, characterized in that: The rotating ring (22) has an I-shaped cross section, and the fixed sleeve (21) is sleeved inside the I-shaped groove of the rotating ring (22). A plurality of limit grooves (23) are provided on both side walls of the rotating ring (22) along the circumferential direction, and limit blocks (24) are installed on the side walls of the limit plate (20) and the rotating ring (22) opposite to each other along the circumferential direction, the limit grooves (23) and the limit blocks (24) are located at corresponding positions, and rubber pads are bonded to the side walls of the limit plate (20) and the rotating ring (22) opposite to each other.

4. The detachable air purification filter structure according to claim 1, characterized in that: The sliding seat (25) is an arc-shaped block, and both side walls of the rotating groove (14) are provided with snap rings (26), the snap rings (26) are arc-shaped rings, and the snap rings (26) slide through the opposite side walls of the snap ring (26).

5. The detachable air purification filter structure according to claim 1, characterized in that: In the initial state, the fixed ring (7) is tangent to the bottom side wall of the connecting tube (3), and when the spring (12) is in a balanced state, the height of the adjusting ring (10) exceeds the height of the fixed ring (7), so that the adjusting ring (10) extends into the interior of the connecting tube (3), and the depth of the adjusting groove (30) is greater than the height of the adjusting ring (10).

6. The detachable air purification filter structure according to claim 5, characterized in that: The outer wall of the adjusting ring (10) is provided with a plurality of stop grooves (11) along the circumferential direction, and a plurality of stop blocks (29) are installed along the circumferential direction above the inner wall of the adjusting groove (30), the position of the stop block (29) corresponds to the position of the stop groove (11), the stop groove (11) does not penetrate the outer wall of the adjusting ring (10), and the stop block (29) extends into the corresponding stop groove (11).

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