A dust filtering device for indoor decoration

Abstract

The present invention relates to the technical field of air filtration devices, and particularly relates to a dust filtration device for indoor decoration, including an air induction component. The air induction component includes a bottom cover, a rotating frame, and a plurality of windward belts. The rotating frame includes a top cover, a rotating ring, a plurality of fixing rods, and a plurality of support plates. The plurality of fixing rods are arranged between the rotating ring and the top cover. The plurality of support plates are arranged between the top cover and the bottom cover. The windward belts are sleeved on the support plates and the fixing rods. In the dust filtration device for indoor decoration of the present invention, by relatively rotating the rotating ring and the bottom cover, the inclination degree of the windward belts is changed, thereby changing the air outlet angle, flexibly adjusting the air outlet direction, and when the rotating ring and the bottom cover rotate relatively, the windward belts can rotate self-rotationally, and thus on the basis of changing the inclination degree of the windward belts, the windward surfaces of the windward belts are replaced, and the service life of the windward belts can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of air filtration devices, and particularly relates to a dust filtration device for indoor decoration. Background Art

[0002] During the process of indoor decoration, a large amount of dust is generated. These dusts not only pollute the indoor environment, posing a serious threat to the health of construction workers and subsequent occupants, such as causing respiratory diseases, allergic reactions, etc., but also may affect the quality of the decoration project. For example, adhering to the surface of the undried wall paint can cause the paint surface to be uneven. Therefore, the dust filtration device plays an extremely important role in the indoor decoration scenario.

[0003] The air purifier is one of the relatively commonly used dust filtration devices at present. The air purifiers in the prior art usually adopt a multi-layer filtration structure, which can effectively filter dust in the air to a certain extent, remove most of the particulate matters, and play a positive role in improving the indoor air quality. However, when the existing air purifier is working, dust is likely to accumulate on the surface of its fan blades. This not only causes the surface of the blades to become dirty, reducing the air outlet effect, but also increases the speed of wear and damage of the blades, and reduces the service life of the blades. Summary of the Invention

[0004] The present invention provides a dust filtration device for indoor decoration to solve the problem that when the existing dust filtration device is in use, dust is likely to accumulate on the surface of the blades, which not only causes the surface of the blades to become dirty, reducing the air outlet effect, but also increases the speed of wear and damage of the blades, and reduces the service life of the blades.

[0005] A dust filtering device for interior decoration of the present invention adopts the following technical solution: A dust filtering device for interior decoration includes an air outlet box, a housing, and an air guiding component; the housing is installed inside the air outlet box, and the air guiding component is installed inside the housing and can rotate relative to the housing around a first direction, and the first direction is the vertical direction; the air guiding component includes a bottom cover, a rotating frame, and a plurality of windward belts; the rotating frame is located above the bottom cover, and the rotating frame includes a top cover, a rotating ring, a plurality of fixing rods, and a plurality of support plates; the rotating ring is arranged along the first direction, is coaxial with the bottom cover and can rotate relative to the bottom cover; the fixing rods are arranged along the first direction, and the plurality of fixing rods are evenly distributed around the first direction between the rotating ring and the top cover and are fixed between the rotating ring and the top cover; the support plates are arranged along a second direction, and the second direction is the horizontal direction, and the plurality of support plates are evenly distributed around the first direction between the top cover and the bottom cover; the two ends of the support plate along the second direction are respectively called the inner end and the outer end, and the inner end is located on the side of the outer end closer to the vertical central axis of the rotating ring in the second direction; the windward belt is annular, and the support plates, the fixing rods, and the windward belts are arranged in one-to-one correspondence. The fixing rod is located on the side of its corresponding support plate away from the vertical central axis of the rotating ring in the second direction. Each windward belt is sleeved on its corresponding support plate and its corresponding fixing rod. The relative rotation of the rotating ring and the bottom cover can make the inner end of the support plate revolve around the first direction relative to its outer end, and can make the windward belt rotate around the first direction.

[0006] Further, the inner end of the support plate can slide along the second direction on the bottom cover and can rotate relative to the bottom cover around the first direction, and the outer end of the support plate is hinged to the rotating ring.

[0007] Further, a plurality of first ratchet teeth are evenly distributed around the first direction on the inner peripheral wall surface of the windward belt, a plurality of second ratchet teeth are evenly distributed around the first direction on the outer peripheral wall surface of the support plate, the second ratchet teeth are elastic telescopic teeth, and the first ratchet teeth are engaged with the second ratchet teeth; a plurality of third ratchet teeth are evenly distributed around the first direction on the outer peripheral wall surface of the fixing rod, the third ratchet teeth are elastic telescopic teeth, and the third ratchet teeth are engaged with the first ratchet teeth; the relative rotation of the rotating ring and the bottom cover can make the support plate rotate around the vertical central axis of the fixing rod relative to the fixing rod, and when the support plate rotates around the vertical central axis of the fixing rod in the positive rotation direction relative to the fixing rod, the windward belt can rotate around the first direction.

[0008] Further, a plurality of second ratchet teeth are all located on one side of the inner end of the support plate and are distributed in an arc shape.

[0009] Further, a plurality of collecting shells are evenly distributed around the upper end of the rotating ring in the first direction. The plurality of collecting shells are arranged in one-to-one correspondence with the plurality of windward belts. Each collecting shell is located on the side of its corresponding windward belt away from the vertical central axis of the rotating ring in the second direction. The collecting shell has two contact ends, and the two contact ends are arranged in sequence in the rotating direction of the windward belt. A gap is left between one of the contact ends and the windward belt, and a brush is arranged on the other contact end; the collecting shell is filled with filter cotton; a suction port is defined between the filter cottons. A plurality of communication ports are evenly distributed around the top cover in the first direction. The plurality of communication ports are arranged in one-to-one correspondence with the plurality of suction ports. Each communication port is communicated with its corresponding suction port, and the communication port can provide negative pressure to the suction port.

[0010] Further, a purification box is further included. The air outlet box is located above the purification box and is communicated with the purification box.

[0011] Further, an air outlet is opened on the air outlet box, an air inlet and an air outlet are opened on the housing, the air inlet is arranged facing the purification box, and the air outlet is arranged facing the air outlet.

[0012] Further, a plurality of waist-shaped grooves are opened on the bottom cover. The plurality of waist-shaped grooves are evenly distributed around the bottom cover in the first direction. The plurality of waist-shaped grooves are all arranged in the second direction. The plurality of waist-shaped grooves are arranged in one-to-one correspondence with the plurality of support plates. The inner end of each support plate is installed in its corresponding waist-shaped groove.

[0013] Further, a control motor is fixedly arranged at the upper end of the bottom cover. A rotating wheel is fixedly arranged at the output end of the control motor. A follower ring is arranged on the outer peripheral wall surface of the rotating ring, and the follower ring meshes with the rotating wheel.

[0014] Further, a driving motor is arranged on the housing. The output shaft of the driving motor extends into the housing and is fixedly connected to the top cover. The output torque of the driving motor is greater than the output torque of the control motor.

[0015] The beneficial effects of the present invention are as follows: A dust filtering device for indoor decoration according to the present invention changes the inclination degree of the windward belt by relatively rotating the rotating ring and the bottom cover, thereby changing the air outlet angle, flexibly adjusting the air outlet direction, helping to optimize the air flow distribution, making the air flow more uniform or directional according to actual needs, and improving the air circulation effect. And when the rotating ring and the bottom cover rotate relatively, the windward belt can rotate automatically. Thus, on the basis of changing the inclination degree of the windward belt, the windward surface of the windward belt can be replaced, which can avoid the windward belt bearing the air flow pressure and dust deposition at the same position for a long time, thereby reducing the wear and damage speed of the windward belt and prolonging the service life of the windward belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overall structure of an embodiment of a dust filtering device for indoor decoration according to the present invention;

[0018] Figure 2 Schematic diagram of the air induction mechanism of an embodiment of a dust filtering device for indoor decoration according to the present invention;

[0019] Figure 3 Cross-sectional view of the housing of an embodiment of a dust filtering device for indoor decoration according to the present invention;

[0020] Figure 4 Schematic diagram of the air induction assembly of an embodiment of a dust filtering device for indoor decoration according to the present invention;

[0021] Figure 5 For Figure 4 Enlarged view of part A in

[0022] Figure 6 Cross-sectional view of the air induction assembly of an embodiment of a dust filtering device for indoor decoration according to the present invention;

[0023] Figure 7 For Figure 6 Enlarged view of part B in

[0024] Figure 8 Schematic diagram of the rotating frame of an embodiment of a dust filtering device for indoor decoration according to the present invention after removing the fixing rod;

[0025] Figure 9 For Figure 8 Enlarged view of part C in

[0026] Figure 10 Schematic diagram of the bottom cover of an embodiment of a dust filtering device for indoor decoration according to the present invention;

[0027] Figure 11 Cross-sectional view of the upper part structure of the air induction assembly of an embodiment of a dust filtering device for indoor decoration according to the present invention.

[0028] In the figure: 100, purification box; 200, air outlet box; 201, air outlet; 300, housing; 301, air inlet; 302, air outlet; 310, driving motor; 320, bottom cover; 321, control motor; 322, kidney-shaped slot; 330, rotating frame; 331, top cover; 332, rotating ring; 333, fixing rod; 334, support plate; 335, second ratchet; 336, third ratchet; 337, mounting hole; 338, communication port; 339, rotating rod; 340, windward belt; 341, first ratchet; 350, collection shell; 351, suction port. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] An embodiment of a dust filtering device for indoor decoration of the present invention is as Figures 1 to 11 shown.

[0031] A dust filtering device for indoor decoration includes a purification box 100, an air outlet box 200 and an air guiding mechanism. The purification box 100 and the air outlet box 200 are arranged in sequence in the first direction. The first direction is the vertical direction, and the air outlet box 200 is located above the purification box 100 and is communicated with the purification box 100. A filtering component is arranged in the purification box 100. The filtering component is a prior art, including filtering structures such as HEPA filters and activated carbon filters for filtering dust, which will not be elaborated here.

[0032] An air outlet 201 is provided on the air outlet box 200. The air guiding mechanism is installed in the air outlet box 200. The air guiding mechanism includes a housing 300 and an air guiding component. The housing 300 is fixedly installed in the air outlet box 200. An air inlet 301 and an air outlet 302 are provided on the housing 300. The air inlet 301 is arranged towards the purification box 100, and the air outlet 302 is arranged towards the air outlet 201. The air guiding component is installed in the housing 300 and can rotate relative to the housing 300 around the first direction. The air guiding component includes a bottom cover 320, a rotating frame 330 and a plurality of windward belts 340. The bottom cover 320 is a ring structure. The rotating frame 330 is located above the bottom cover 320. The rotating frame 330 includes a top cover 331, a rotating ring 332, a plurality of fixing rods 333 and a plurality of support plates 334. The rotating ring 332 is arranged along the first direction, is coaxial with the bottom cover 320 and can rotate relative to the bottom cover 320.

[0033] The fixed rods 333 are arranged along the first direction. A plurality of fixed rods 333 are evenly distributed around the first direction between the rotating ring 332 and the top cover 331 and are fixed between the rotating ring 332 and the top cover 331. The support plates 334 are arranged along the second direction, and the second direction is the horizontal direction. A plurality of support plates 334 are evenly distributed around the first direction between the top cover 331 and the bottom cover 320. The two ends of the support plate 334 along the second direction are respectively referred to as the inner end and the outer end, and the inner end is located on the side of the outer end closer to the vertical central axis of the rotating ring 332 in the second direction. The windward belt 340 is annular. The support plates 334, the fixed rods 333, and the windward belts 340 are arranged in one-to-one correspondence. The fixed rod 333 is located on the side of its corresponding support plate 334 away from the vertical central axis of the rotating ring 332 in the second direction. Each windward belt 340 is sleeved on its corresponding support plate 334 and its corresponding fixed rod 333. The relative rotation of the rotating ring 332 and the bottom cover 320 can make the inner end of the support plate 334 revolve around the first direction relative to its outer end, and can make the windward belt 340 rotate around the first direction.

[0034] Specifically, a plurality of mounting holes 337 are formed in the top cover 331. The plurality of mounting holes 337 are evenly distributed around the first direction on the lower end surface of the top cover 331. The plurality of mounting holes 337 are arranged in one-to-one correspondence with the plurality of fixed rods 333. Each fixed rod 333 is fixedly installed in its corresponding mounting hole 337.

[0035] In this embodiment, by providing the air guiding mechanism, during use, first drive the air guiding assembly located in the housing 300 to rotate around the first direction, so that the air (which may contain dust) can enter the housing 300 from the air inlet, and after passing through a plurality of windward belts 340, it is discharged from the air outlet 201 through the air outlet 302.

[0036] Then drive the relative rotation of the rotating ring 332 and the bottom cover 320, and make the inner end of the support plate 334 revolve around the first direction relative to its outer end, and drive the windward belt 340 to rotate, changing the inclination degree of the windward belt 340, thereby changing the air outlet angle, flexibly adjusting the air outlet direction, which helps to optimize the air flow distribution and improve the air circulation effect. And when the rotating ring 332 and the bottom cover 320 rotate relatively, the windward belt 340 can rotate around the first direction. Furthermore, on the basis of changing the inclination degree of the windward belt 340, the windward surface of the windward belt 340 can be replaced, which can avoid the windward belt 340 bearing the air flow pressure and dust deposition at the same position for a long time, thereby reducing the wear and damage speed of the windward belt 340 and extending the service life of the windward belt 340.

[0037] In this embodiment, the inner end of the support plate 334 can slide along the second direction on the bottom cover 320 and can rotate around the first direction relative to the bottom cover 320. The outer end of the support plate 334 is hinged to the rotating ring 332.

[0038] Specifically, a plurality of waist-shaped slots 322 are formed in the bottom cover 320. The plurality of waist-shaped slots 322 are evenly distributed around the first direction on the bottom cover 320. The plurality of waist-shaped slots 322 are all arranged along the second direction. The plurality of waist-shaped slots 322 are arranged in one-to-one correspondence with the plurality of support plates 334. The inner end of each support plate 334 is installed in the corresponding waist-shaped slot 322, so that the inner end of the support plate 334 can slide along the second direction on the bottom cover 320 and can rotate around the first direction relative to the bottom cover 320. More specifically, a rotating rod 339 is provided at the inner end of the support plate 334, and the rotating rod 339 is installed in the corresponding waist-shaped slot 322.

[0039] In this embodiment, a control motor 321 is fixedly provided at the upper end of the bottom cover 320. A rotating wheel is fixedly provided at the output end of the control motor 321. A follower ring is provided on the outer peripheral wall surface of the rotating ring 332, and the follower ring meshes with the rotating wheel. More specifically, the rotating wheel is a gear and the follower ring is a toothed ring, or the rotating wheel is a friction wheel and the follower ring is a friction ring. Further, two control motors 321 are provided. By providing two control motors 321, the rotation stability of the rotating ring 332 is improved.

[0040] A driving motor 310 is provided on the housing 300. The output shaft of the driving motor 310 extends into the housing 300 and is fixedly connected to the top cover 331. The output torque of the driving motor 310 is greater than the output torque of the control motor 321.

[0041] When the driving motor 310 is started, it can drive the top cover 331 to rotate. Since the fixing rod 333 is fixed between the top cover 331 and the rotating ring 332, the top cover 331 will drive the fixing rod 333 and the rotating ring 332 to rotate synchronously. Also, because the follower ring on the rotating ring 332 meshes with the rotating wheel on the control motor 321, and the bottom cover 320 is fixedly connected to the control motor 321, when the rotating ring 332 rotates, the rotating ring 332 will drive the bottom cover 320 to rotate synchronously through the control motor 321. When the control motor 321 is not started, the rotating ring 332 and the bottom cover 320 are relatively stationary, so that the inner end and the outer end of the support plate 334 remain relatively stationary, that is, the entire air guiding assembly is in a relatively stationary state, and thus the entire air guiding assembly rotates around the first direction.

[0042] When the control motor 321 starts, the control motor 321 will tend to drive the rotating ring 332 to rotate and drive the entire rotating frame 330 to rotate. However, since the output torque of the driving motor 310 is greater than the output torque of the control motor 321, the rotation of the rotating frame 330 will be restricted. Furthermore, through the meshing of the follower ring and the rotating wheel, the control motor 321 will be prompted to drive the bottom cover 320 to rotate relative to the rotating frame 330. That is, the rotating ring 332 and the bottom cover 320 rotate relative to each other. The rotation of the bottom cover 320 will drive the inner end of the support plate 334 to revolve relative to its outer end around the first direction and drive the windward belt 340 to rotate, changing the inclination degree of the windward belt 340.

[0043] Specifically, the housing 300 includes an upper shell and a lower shell. The upper shell is located above the lower shell, and the upper shell is fixedly connected to the lower shell. The output shaft of the driving motor 310 extends into the upper shell and is fixedly connected to the top cover 331. The air inlet 301 is opened on the lower shell, and the air outlet 302 is defined by the upper shell and the lower shell together.

[0044] In this embodiment, a plurality of first ratchet teeth 341 are evenly distributed around the first direction on the inner peripheral wall surface of the windward belt 340. A plurality of second ratchet teeth 335 are evenly distributed around the first direction on the outer peripheral wall surface of the support plate 334. The second ratchet teeth 335 are elastic telescopic teeth, and a plurality of second ratchet teeth 335 are all located on one side of the inner end of the support plate 334 and are arc-shaped. The first ratchet teeth 341 mesh with the second ratchet teeth 335. A plurality of third ratchet teeth 336 are evenly distributed around the first direction on the outer peripheral wall surface of the fixing rod 333. The third ratchet teeth 336 are elastic telescopic teeth, and a plurality of third ratchet teeth 336 are all arranged on the side away from the support plate 334 along the second direction and are arc-shaped. The third ratchet teeth 336 mesh with the first ratchet teeth 341. The relative rotation of the rotating ring 332 and the bottom cover 320 can enable the support plate 334 to rotate relative to the fixing rod 333 around the vertical central axis of the fixing rod 333. And when the support plate 334 rotates forward relative to the fixing rod 333 around the vertical central axis of the fixing rod 333, the windward belt 340 can rotate around the first direction by itself.

[0045] When the rotating ring 332 and the bottom cover 320 rotate relative to each other and drive the inner end of the support plate 334 to swing relative to its outer end, since the outer end of the support plate 334 is hinged to the rotating ring 332 and the fixing rod 333 is fixed on the rotating ring 332, at this time, between the support plate 334 and the fixing rod 333, taking the fixing rod 333 as stationary relative to the support plate 334 for explanation, that is, the support plate 334 rotates relative to the fixing rod 333 around the vertical central axis of the fixing rod 333. Refer to the attached Figure 11 As shown, taking the clockwise rotation of the support plate 334 relative to the fixing rod 333 around the vertical central axis of the fixing rod 333 as the forward rotation, and taking the counterclockwise rotation of the support plate 334 relative to the fixing rod 333 around the vertical central axis of the fixing rod 333 as the reverse rotation.

[0046] When the support plate 334 rotates clockwise (revolves clockwise) relative to the fixed rod 333 about the vertical central axis of the fixed rod 333, the support plate 334 will apply a pulling force to the left side of the windward belt 340. The rotation of the support plate 334 will push the windward belt 340 to rotate clockwise through the second ratchet 335. At this time, the first ratchet 341 inside the windward belt 340 can rotate relative to the third ratchet 336 on the fixed rod 333, causing the third ratchet 336 to expand and contract. That is, the windward belt 340 and the support plate 334 are integrated and rotate clockwise relative to the fixed rod 333, and the windward belt 340 can rotate clockwise about the first direction.

[0047] When the support plate 334 rotates counterclockwise (revolves counterclockwise) relative to the fixed rod 333 about the vertical central axis of the fixed rod 333, the rotation of the support plate 334 will cause the second ratchet 335 on the support plate 334 to rotate relative to the first ratchet 341 on the support belt. The windward belt 340 and the fixed rod 333 remain stationary, and the support plate 334 rotates idly. That is, during the process of controlling the start of the control motor 321 and making the rotating ring 332 rotate relative to the bottom cover 320, the windward belt 340 rotates intermittently to change the windward surface. And when the windward belt 340 rotates, the first ratchet 341 on the windward belt 340 can cause the windward belt 340 to vibrate to a certain extent when cooperating with the second ratchet 335 and the third ratchet 336, reducing the dust adhesion rate.

[0048] In another possible embodiment, a plurality of collection shells 350 are evenly distributed around the first direction at the upper end of the rotating ring 332. The plurality of collection shells 350 are arranged in one-to-one correspondence with the plurality of windward belts 340. Each collection shell 350 is located on the side of its corresponding windward belt 340 away from the vertical central axis of the rotating ring 332 in the second direction. The collection shell 350 has two contact ends, which are arranged in sequence in the rotation direction of the windward belt 340. There is a gap between one of the contact ends and the windward belt 340, so that dust can enter the collection shell 350 from the gap, and a brush is provided on the other contact end. The collection shell 350 is filled with filter cotton. Suction ports 351 are defined between the filter cottons. A plurality of communication ports 338 are evenly distributed around the first direction on the top cover 331. The plurality of communication ports 338 are arranged in one-to-one correspondence with the plurality of suction ports 351. Each communication port 338 is communicated with its corresponding suction port 351, and the communication port 338 can provide negative pressure to the suction port 351.

[0049] By providing the collection housing 350, when the air guiding component rotates relative to the housing 300 in the first direction, air (which may contain dust) enters the housing 300 from the air inlet. During the process of flowing through the plurality of windward zones 340 and then being discharged from the air outlet 201 through the air outlet 302, when the air flows from the windward zone 340 towards the air outlet 302, it will flow out from the circumferential position of the windward zone 340, causing the air flow to have a relatively high velocity when passing through the communication port 338 and generating a negative pressure at the communication port 338. The negative pressure generated at the communication port 338 will create a pressure difference inside the collection housing 350. A part of the air flow and dust can enter the collection housing 350 through the gap and be filtered and collected by the filter cotton, and the brush can prevent the dust from flowing out, enabling the dust to remain inside the collection housing 350.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dust filtering device for indoor decoration, characterized in that: It includes an air outlet box, a shell and an air induction assembly; the shell is installed in the air outlet box, the air induction assembly is installed in the shell and can rotate relative to the shell around a first direction, the first direction being a vertical direction; the air induction assembly includes a bottom cover, a rotating frame and a plurality of windward belts; the rotating frame is located above the bottom cover, and the rotating frame includes a top cover, a rotating ring, a plurality of fixed rods and a plurality of support plates; the rotating ring is arranged along the first direction, is coaxial with the bottom cover and can rotate relative to the bottom cover; the fixed rod is arranged along the first direction, and the plurality of fixed rods are evenly distributed around the first direction between the rotating ring and the top cover, and are fixed between the rotating ring and the top cover; the support plate is arranged along the second direction, the second direction being a horizontal direction, and the plurality of support plates are evenly distributed around the first direction between the top cover and the bottom cover; the two ends of the support plate along the second direction are respectively referred to as the inner end and the outer end, and the inner end is located on the side of the outer end close to the vertical center axis of the rotating ring in the second direction; the windward belt is annular, the support plate, the fixed rod and the windward belt are arranged one by one, and the fixed rod is located on the support plate corresponding to the fixed rod and is away from the vertical center of the rotating ring in the second direction. On one side of the axis, each windward belt is sleeved on the corresponding support plate and the corresponding fixed rod, and the relative rotation of the rotating ring and the bottom cover can make the inner end of the support plate revolve and rotate relative to its outer end around the first direction, and can make the windward belt rotate around the first direction; the inner end of the support plate can slide on the bottom cover along the second direction and can rotate relative to the bottom cover around the first direction, and the outer end of the support plate is hinged to the rotating ring; a plurality of first ratchet teeth are evenly distributed on the inner circumferential wall surface of the windward belt around the first direction, and a plurality of second ratchet teeth are evenly distributed on the outer circumferential wall surface of the support plate around the first direction, the second ratchet teeth are elastically retractable teeth, and the first ratchet teeth are meshed with the second ratchet teeth; a plurality of third ratchet teeth are evenly distributed on the outer circumferential wall surface of the fixed rod around the first direction, the third ratchet teeth are elastically retractable teeth, and the third ratchet teeth are meshed with the first ratchet teeth; the relative rotation of the rotating ring and the bottom cover can make the support plate rotate relative to the fixed rod around the vertical center axis of the fixed rod, and when the support plate rotates forward relative to the fixed rod around the vertical center axis of the fixed rod, the windward belt can rotate around the first direction.

2. A dust filtering device for indoor decoration according to claim 1, characterized in that: The plurality of second ratchet teeth are all located on one side of the inner end of the support plate and are distributed in an arc shape.

3. The dust filtering device for indoor decoration according to claim 1, characterized in that: The upper end of the rotating ring is evenly distributed with multiple collecting shells around the first direction, and the multiple collecting shells are arranged in one-to-one correspondence with the multiple windward belts. Each collecting shell is located on the side of the corresponding windward belt in the second direction away from the vertical central axis of the rotating ring. The collecting shell has two contact ends, and the two contact ends are arranged in sequence in the rotation direction of the windward belt, a gap is left between one of the contact ends and the windward belt, and a brush is arranged on the other contact end; the collecting shell is filled with filter cotton; suction ports are defined between the filter cottons, and the top cover is evenly distributed with multiple connecting ports around the first direction, and the multiple connecting ports are arranged in one-to-one correspondence with the multiple suction ports, each connecting port is connected to the corresponding suction port, and the connecting port can provide negative pressure to the suction port.

4. The dust filtering device for indoor decoration according to claim 1, characterized in that: It also includes a purification box, and an air outlet box is located above the purification box and is connected to the purification box.

5. A dust filtering device for indoor decoration according to claim 4, characterized in that: An air outlet is provided on the air outlet box, and an air inlet and an air exhaust port are provided on the shell body. The air inlet is arranged toward the purification box, and the air exhaust port is arranged toward the air outlet.

6. The dust filtering device for indoor decoration according to claim 1, characterized in that: A plurality of waist-shaped grooves are provided on the bottom cover, and the plurality of waist-shaped grooves are evenly distributed around the first direction on the bottom cover, and the plurality of waist-shaped grooves are arranged along the second direction. The plurality of waist-shaped grooves are arranged correspondingly to the plurality of support plates, and the inner end of each support plate is installed in the corresponding waist-shaped groove.

7. The dust filtering device for indoor decoration according to claim 1, characterized in that: A control motor is fixedly arranged on the upper end of the bottom cover, a rotating wheel is fixedly arranged on the output end of the control motor, a follower ring is arranged on the outer peripheral wall surface of the rotating ring, and the follower ring is meshed with the rotating wheel.

8. The dust filtering device for indoor decoration according to claim 7, characterized in that: An active motor is arranged on the shell, an output shaft of the active motor extends into the shell and is fixedly connected to the top cover, and an output torque of the active motor is greater than an output torque of the control motor.

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