Brushless direct current motor air duct with dust removal structure

Abstract

The invention discloses a brushless direct current motor air duct with a dust removal structure, and relates to the field of air duct dust removal, the brushless direct current motor air duct comprises a spraying unit and a fan unit which are installed in the air duct, and further comprises a gas-liquid separation unit which is installed in the air duct and located between the spraying unit and the fan unit, and the gas-liquid separation unit comprises a first component and a plurality of strip-shaped air bags; the longitudinal section of the first component is in a funnel shape, the strip-shaped air bags are fixedly installed on the inner surface of the first component in an annular array shape, a partition plate is arranged between every two adjacent strip-shaped air bags, and air channels are formed in the partition plates and the first component. According to the brushless direct current motor air duct with the dust removal structure, after the strip-shaped air bag is arranged and filled with a certain amount of gas, the air bag is in an incomplete expansion state, the contact area between the air bag and dust-containing liquid drops can be further increased, the air bag can shake slightly when in a gas flowing environment, and the dust removal effect is improved. The efficiency of moving and gradually collecting the liquid drops on the surface of the airbag is improved.

Description

Technical Field

[0001] This invention relates to dust removal technology for air ducts, specifically to a brushless DC motor air duct with a dust removal structure. Background Technology

[0002] Brushless DC motors are often designed for cleaning dust, debris, or other particulate matter in dust ducts. In these applications, brushless DC motors offer superior controllability, such as speed adjustment through a precise electronic control system, providing more flexible dust removal performance. This controllability allows the suction strength of the dust duct to be adjusted as needed to adapt to different cleaning tasks. Brushless DC motors offer high efficiency, controllability, long lifespan, and relatively low noise in dust removal applications in dust ducts, making them a common power system in modern dust removal equipment.

[0003] When using a duct to remove dust from dusty work environments, a spray system is often required. This system uses fine droplets to adsorb dust, separating the gas and dust inside the duct to prevent dust from being directly discharged outside. Chinese invention patent CN110833737B discloses a multi-stage filtration wet dust collector fan. This fan uses a sponge filter with a rotating plate and sponges mounted on it to initially adsorb dust-laden droplets, and then uses a second perforated groove to squeeze out water from inside the sponge, achieving initial gas-water separation. However... By using water-absorbing components made of porous materials such as sponges, some dust particles may remain trapped in the gaps when small droplets carrying dust are squeezed out of the sponge, hindering airflow. After being squeezed for a certain period of time, the sponge's resilience will be greatly reduced, affecting its performance. Furthermore, the horizontal and vertical baffles and rotating plates occupy a large space inside the air duct, reducing the airflow rate. Also, when the dust removal components separate gas and droplets, the contact area between the dust-laden liquid and the dust removal components is small, resulting in low dust removal efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a brushless DC motor duct with a dust removal structure to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a brushless DC motor duct with a dust removal structure, comprising a spray unit and a fan unit installed inside the duct, and further comprising a gas-liquid separation unit installed inside the duct and located between the spray unit and the fan unit, the gas-liquid separation unit comprising:

[0006] The first component has a funnel-shaped longitudinal section. The first component is coaxially arranged with the air duct. The large end of the first component faces the spray unit. The outer side of the large end of the first component is rotatably connected to the inner wall of the air duct. The first component divides the channels in the air duct to form a first channel close to the spray unit and a second channel close to the fan unit. The small end of the first component is connected to a first drive mechanism for driving it to rotate around the axis of the air duct.

[0007] Several strip-shaped airbags are fixedly mounted on the inner surface of a first component in a circular array. A partition is provided between adjacent airbags. One side of each partition is fixedly connected to the inner surface of the first component. Gas channels communicating between a first channel and a second channel are formed on the partitions and the first component. Each airbag is filled with gas of volume V1, and it satisfies the following conditions:

[0008]

[0009] Where V is the size of the space occupied by the inner cavity of the strip-shaped airbag when it is fully inflated.

[0010] Furthermore, an annular plate is fixedly installed at the large end of the first component, and a groove for liquid flow is formed between the annular plate and the large end of the first component. A first opening is provided on the annular plate, and a collection chamber is provided at the bottom of the air duct located on one side of the first opening.

[0011] Furthermore, a third channel is provided inside the partition, and a fourth channel is provided on both sides of the partition, which is connected to the third channel and the first channel. A fifth channel is provided on the first component, which is connected to the second channel and the third channel.

[0012] Furthermore, the fourth channel is a plurality of through holes with a circular or polygonal cross-section, and the distance between adjacent through holes is greater than the maximum width of the through hole.

[0013] Furthermore, a second component is also installed on the partition plate. The second component can move to a first position and a second position. When the second component moves to the first position, the fourth channel is closed. When the second component moves to the second position, the fourth channel is opened. The second component is connected to a B-drive component for driving its movement.

[0014] Furthermore, the second component is a U-shaped baffle, the inner surface of which is slidably connected to both sides of the partition, and a sixth channel with the same cross-sectional size as the fourth channel is opened on both sides of the U-shaped baffle. The U-shaped baffle is connected to the output end of the B drive component.

[0015] Furthermore, the B driving component includes a first driving disk, one side of which is fixedly connected to one end of a support rod, and the first driving disk is coaxial with the support rod;

[0016] The B-drive component further includes a slide rod, one end of which is fixedly connected to one side of a U-shaped baffle. A sliding sleeve is fixedly connected to one side of the U-shaped baffle. A guide rod is slidably connected inside the sliding sleeve. A fixing block is fixedly connected to one end of the guide rod. The fixing block is fixedly connected to one side of a partition. A spring is sleeved on the surface of the guide rod located between the sliding sleeve and the fixing block. A first annular track is provided on the side of the first drive disk. A protrusion is provided on the first annular track. One end of the slide rod abuts against the surface of the first annular track.

[0017] Furthermore, a third component is also installed on the partition. The third component includes two side plates, one side of which is slidably connected to both sides of the same partition. Each side plate has a seventh channel with the same cross-sectional size as the fourth channel. The two side plates can move to a third position and a fourth position respectively. When a side plate moves to the third position, the fourth channel adjacent to that side plate is closed. When a side plate moves to the fourth position, the fourth channel adjacent to that side plate is opened. The third component is connected to a C-drive component for driving its movement.

[0018] Furthermore, the C-drive component includes a second drive disk, one side of which is fixedly connected to one end of the support rod, and the second drive disk is coaxial with the support rod;

[0019] The C-drive component also includes a second rotating shaft, with two brackets rotatably connected to both ends of the second rotating shaft. One side of the two brackets is fixedly connected to one side of the partition. A gear is fixedly connected to one end of the second rotating shaft. A second annular track is provided on the side of the second drive disk. Four sector racks are provided on the second annular track. When the partition rotates, it drives the gear to mesh with the four sector racks in sequence.

[0020] Furthermore, a third bevel gear is fixedly connected to one end of the second rotating shaft, a fourth bevel gear is meshed with one side of the third bevel gear, a third rotating shaft is fixedly connected to one side of the fourth bevel gear, the third rotating shaft is rotatably connected to one side of the partition, a first cam and a second cam are fixedly connected to the third rotating shaft, and a U-shaped frame is fixedly connected to one side of each of the two side plates, with one side of the first cam and one side of the second cam respectively abutting against the inner side of the two U-shaped frames.

[0021] Compared with the prior art, the brushless DC motor fan duct with a dust removal structure provided by the present invention has the following beneficial effects:

[0022] 1. This brushless DC motor duct with a dust removal structure, by setting a first component and a strip-shaped airbag and filling the strip-shaped airbag with a certain amount of gas, the airbag is in a partially inflated state, which can further increase its contact area with dust-laden droplets. Moreover, when the airbag is in a gas flow environment, it can shake slightly, which improves the efficiency of droplet movement and gradual collection on the surface of the airbag. The setting of the first component increases the contact area with small droplets carrying dust, and its impact on the gas flow rate is small, thereby improving the efficiency of dust removal operations through the duct.

[0023] 2. This brushless DC motor duct with a dust removal structure, by setting an annular plate and a first opening, keeps the dust-laden liquid flowing into the trench in a state of relative flow with the trench, improving the fluidity of the dust-laden liquid. This prevents the dust in the dust-laden liquid from settling in the trench and not being able to flow completely with the water flow to the collection bin. The rotation of the first opening can temporarily retain the collected liquid in the trench, increasing the volume of the liquid in the trench. When the first opening rotates to the bottom, the amount of liquid accumulated in the trench is larger. When it flows out of the first opening, it washes away the settled dust with greater kinetic energy, allowing most of the dust to flow out with the liquid from the first opening.

[0024] 3. The brushless DC motor duct with dust removal structure, by setting a second component, can close the fourth channel when the baffle moves from the four o'clock position to the eight o'clock position, so as to reduce the amount of dust-laden liquid flowing out from the gas channel.

[0025] 4. This brushless DC motor fan duct with a dust removal structure, by further setting a third component, causes the upper fourth channel on the baffle to close and the lower fourth channel to open when the baffle rotates from the two o'clock position to the four o'clock position. When the baffle rotates from the eight o'clock position to the ten o'clock position, the same principle applies. This further reduces the amount of dust-laden droplets that flow out of the gas channel after falling on the baffle when they move towards the first component under the propulsion of airflow and their own weight. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the longitudinal section structure of the air duct provided in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the longitudinal section of the first component provided in an embodiment of the present invention;

[0030] Figure 4 Provided for embodiments of the present invention Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the partition, the B-drive component, and the second component provided in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the partition and the second component in a separated state according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the partition, C-drive component, and third component provided in an embodiment of the present invention;

[0034] Figure 8 This is a partial structural diagram of the partition, the third component, and the C-drive component provided in an embodiment of the present invention;

[0035] Figure 9 Provided for embodiments of the present invention Figure 8 Enlarged view of point B in the middle;

[0036] Figure 10 This is a schematic diagram showing the partition and the two side plates separated in an embodiment of the present invention;

[0037] Figure 11 This is a dynamic schematic diagram of the C-drive component driving the side plate to move, as provided in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Air duct; 2. Spray unit; 3. Fan unit; 31. Brushless DC motor body; 4. First component; 41. Annular plate; 42. Groove; 43. First opening; 44. Collection chamber; 45. Fifth channel; 5. First drive mechanism; 51. First rotating drum; 52. Support rod; 53. Support plate; 54. First bevel gear; 55. Second bevel gear; 56. First rotating shaft; 57. A drive component; 6. Strip-shaped airbag; 7. Partition; 71. Third channel; 72. Fourth channel; 8. Second component; 81. U-shaped baffle; 82. Sixth channel; 9. B. Drive component; 91. First drive disc; 92. Slide rod; 93. Sliding sleeve; 94. Guide rod; 95. Fixing block; 96. Spring; 97. First annular track; 98. Protrusion; 10. Third component; 101. Side plate; 102. Seventh channel; 11. C. Drive component; 111. Second drive disc; 112. Second rotating shaft; 113. Gear; 114. Second annular track; 115. Sector rack; 116. Third rotating shaft; 117. First cam; 118. Second cam; 119. U-shaped frame; 12. First channel; 13. Second channel. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Example:

[0042] Please see Figures 1-11 A brushless DC motor duct with a dust removal structure includes a spray unit 2 and a fan unit 3 installed inside the duct 1, and further includes a gas-liquid separation unit installed inside the duct 1 and located between the spray unit 2 and the fan unit 3. The gas-liquid separation unit includes:

[0043] The first component 4 has a funnel-shaped longitudinal section. The first component 4 is coaxially arranged with the air duct 1. The large end of the first component 4 faces the spray unit 2. The outer side of the large end of the first component 4 is rotatably connected to the inner wall of the air duct 1. The first component 4 divides the channels in the air duct 1 to form a first channel 12 near the spray unit 2 and a second channel 13 near the fan unit 3. The small end of the first component 4 is connected to a first drive mechanism 5 for driving it to rotate around the axis of the air duct 1.

[0044] Several strip-shaped airbags 6 are fixedly installed on the inner surface of the first component 4 in a ring array. A partition 7 is provided between adjacent strip-shaped airbags 6. One side of the partition 7 is fixedly connected to the inner surface of the first component 4. Gas channels connecting the partition 7 and the first component 4 are opened, which communicate with the first channel 12 and the second channel 13. The strip-shaped airbags 6 are filled with gas of volume V1, and it satisfies the following:

[0045]

[0046] Wherein, V is the size of the space occupied by the inner cavity of the strip-shaped airbag 6 when it is fully inflated. After the strip-shaped airbag 6 is filled with a certain amount of gas, it is in a partially inflated state, which can further increase its contact area with the dust-laden droplets. It also allows the strip-shaped airbag 6 to shake slightly when it is in a gas flow environment, thereby improving the efficiency of the droplets on the surface of the strip-shaped airbag 6 moving and gradually accumulating.

[0047] In one embodiment of the present invention, a flexible plate (not shown in the figure) may be installed inside the strip-shaped airbag 6 and on the side near the large end of the first component 4. One side of the flexible plate abuts against the inner wall of the strip-shaped airbag 6 near the groove 42. When the airflow passes through the first component 4, in addition to providing a certain support for the edge of the strip-shaped airbag 6, the flexible plate can also bend and deform back and forth under the action of the airflow. During the process of reciprocating deformation, the flexible plate can further drive the strip-shaped airbag 6 to shake.

[0048] In one embodiment of the present invention, the placement position of the strip-shaped airbag 6 is not limited, and can be as follows: Figure 2 and Figure 3 The length direction of the strip airbag 6 is shown to be in the plane where the axis of the first component 4 is located, that is, the extended line of the length direction of the strip airbag 6 intersects the extended line of the axis of the first component 4. Alternatively, the length direction of the strip airbag 6 may intersect the plane where the axis of the first component 4 is located, that is, the extended line of the length direction of the strip airbag 6 does not intersect the extended line of the axis of the first component 4.

[0049] In one embodiment of the present invention, an annular plate 41 is fixedly installed at the large end of the first component 4, such as... Figure 2 and Figure 3 As shown, a groove 42 for liquid flow is formed between the annular plate 41 and the large end of the first component 4. A first opening 43 is provided on the annular plate 41, and a collection chamber 44 is provided at the bottom of the air duct 1 located on one side of the first opening 43.

[0050] In one embodiment of the present invention, the first driving mechanism 5 includes a first rotating cylinder 51 and a support rod 52. The surface of the support rod 52 is rotatably connected to the inner wall of the first rotating cylinder 51. One end of the first rotating cylinder 51 is fixedly connected to the small end of the first component 4. One end of the support rod 52 passes through the first component 4 and is rotatably connected to the inner wall of the first component 4. The other end of the support rod 52 is fixedly connected to a support plate 53. One end of the support plate 53 is fixedly connected to the inner wall of the air duct 1. The axes of the support rod 52 and the first rotating cylinder 51 coincide with the axis of the air duct 1. One end of the first rotating cylinder 51 is fixedly connected to a first bevel gear 54. A second bevel gear 55 is meshed with one side of the first bevel gear 54. A first rotating shaft 56 is fixedly connected to one side of the second bevel gear 55. One end of the first rotating shaft 56 passes through the air duct 1 and is rotatably connected to the inner wall of the air duct 1. The first rotating shaft 56 is connected to the output end of the A driving component 57. The A driving component 57 is used to drive the first rotating shaft 56 to rotate along its axis.

[0051] In one embodiment of this disclosure, drive component 57 A is an electric motor, a hydraulic motor, or a pneumatic motor.

[0052] In one embodiment of the present invention, the fan unit 3 includes a brushless DC motor body 31 and an impeller (not shown in the figure) installed on the output end of the brushless DC motor. The impeller is driven to rotate by the brushless DC motor to drive the gas flow in the fan duct 1, so as to drive the dust to move in the direction of gas flow in the fan duct 1. The brushless DC motor has a compact structure, occupies less space, has good sealing performance, strong anti-interference ability, and high reliability, which helps to ensure the stability of dust conveyed through the fan duct 1.

[0053] In one embodiment of the present invention, the specific implementation scenario is as follows:

[0054] When the dust conveyed in the air duct 1 reaches the spray unit 2, it mixes with the water mist sprayed by the spray unit 2 and forms a number of dust-laden droplets containing a certain amount of dust. Each dust-laden droplet moves towards the first component 4 under the propulsion of the airflow and its own weight. Most of the dust-laden droplets will land on the surface of the strip-shaped airbag 6 on the inner wall of the first component 4. The gas in the air duct 1 will continue to flow along the gas channel. At this time, as the spray unit 2 and the fan unit 3 continue to work, the dust-laden droplets will gradually gather on the surface of each strip-shaped airbag 6. During the gathering process, adjacent droplets will gradually merge into larger droplets. Finally, after sliding off the surface of the strip-shaped airbag 6, they will flow into the groove 42 and then flow into the collection chamber 44 from the first opening 43 for collection, so as to facilitate the subsequent dust filtration and separation operation.

[0055] In the above-described embodiment, the first drive mechanism 5 can also be activated to drive the first component 4 to rotate. During the rotation, each strip-shaped airbag 6 can rotate cyclically, preventing most of the dust-laden droplets from falling onto the surface of the lower half of the strip-shaped airbags 6 when they move into the first component 4 under the propulsion of the airflow and their own weight. This results in the limited number of dust-laden droplets that the upper strip-shaped airbags 6 can contact. At the same time, the rotation of the first component 4 will also drive the partition 7 to rotate, thereby disturbing the airflow entering the first component 4. This allows the airflow to further shake the walls of the strip-shaped airbags 6, which helps to collect the dust-laden droplets.

[0056] At the same time, the first opening 43 also rotates with the rotation of the first component 4. When the first opening 43 is away from the collection chamber 44, the dust-laden liquid collected in the groove 42 will flow in the groove 42 and cannot flow out. When the first opening 43 rotates to the bottom, the liquid in the groove 42 flows out from the first opening 43 into the collection chamber 44, so that the dust-laden liquid flowing into the groove 42 and the groove 42 are in a continuous relative flow state, improving the fluidity of the dust-laden liquid, so as to avoid the dust in the dust-laden liquid settling in the groove 42 and not being able to flow completely with the water flow into the collection chamber 44. The rotation of the first opening 43 can make the collected liquid temporarily remain in the groove 42, increasing the volume of the liquid in the groove 42. When the first opening 43 rotates to the bottom, the amount of liquid collected in the groove 42 is larger. When it flows from the first opening 43, it washes the settled dust with greater kinetic energy, so that most of the dust can flow out from the first opening 43 with the liquid.

[0057] In one embodiment of the present invention, a third channel 71 is provided inside the partition 7, such as... Figure 3 and Figure 4 As shown, a fourth channel 72 is provided on both sides of the partition 7, which is connected to the third channel 71 and the first channel 12. A fifth channel 45 is provided on the first component 4, which is connected to the second channel 13 and the third channel 71. The third channel 71, the fourth channel 72 and the fifth channel 45 form a gas channel connecting the first channel 12 and the second channel 13.

[0058] In one embodiment of the present invention, the fourth channel 72 is a plurality of through holes with a circular or polygonal cross-section, and the distance between adjacent through holes is greater than the maximum width of the through holes.

[0059] In one embodiment of the present invention, see [reference] Figure 5 and Figure 6The partition 7 is also equipped with a second component 8, which can move to a first position and a second position. When the second component 8 moves to the first position, the fourth channel 72 is closed. When the second component 8 moves to the second position, the fourth channel 72 is opened. When the fourth channel 72 is open, gas can flow from the first channel 12 to the second channel 13. When the fourth channel 72 is closed, gas cannot flow from the first channel 12 to the second channel 13. The second component 8 is connected to a B drive component 9 for driving its movement.

[0060] In one embodiment of the present invention, when the partition 7 is rotated to the four o'clock position, the B driving component 9 drives the second component 8 to move to the first position, and when the partition 7 is rotated to the eight o'clock position, the B driving component 9 drives the second component 8 to move to the second position.

[0061] In one embodiment of the present invention, the second component 8 is a U-shaped baffle 81. The inner surface of the U-shaped baffle 81 is slidably connected to both sides of the partition 7. A sixth channel 82 with the same cross-sectional size as the fourth channel 72 is opened on both sides of the U-shaped baffle 81. When the U-shaped baffle 81 moves to the second position, the sixth channel 82 is connected to the fourth channel 72. When the U-shaped baffle 81 moves to the first position, the surface of the U-shaped baffle 81 blocks the fourth channel 72. The U-shaped baffle 81 is connected to the output end of the B driving component 9.

[0062] In one embodiment of the present invention, the B driving component 9 includes a first driving disk 91, one side of which is fixedly connected to one end of a support rod 52, and the first driving disk 91 and the support rod 52 are coaxial. The B driving component 9 also includes a slide rod 92, one end of which is fixedly connected to one side of a U-shaped baffle 81. A sliding sleeve 93 is fixedly connected to one side of the U-shaped baffle 81. A guide rod 94 is slidably connected inside the sliding sleeve 93. A fixing block 95 is fixedly connected to one end of the guide rod 94. The fixing block 95 is fixedly connected to one side of a partition 7. A spring 96 is sleeved on the surface of the guide rod 94 located between the sliding sleeve 93 and the fixing block 95. A first annular track 97 is provided on the side of the first driving disk 91. A protrusion 98 is provided on the first annular track 97. The two ends of the protrusion 98 are located at the four o'clock position and the eight o'clock position of the first annular track 97, respectively. One end of the slide rod 92 abuts against the surface of the first annular track 97.

[0063] It should be noted that, for ease of understanding, the position of the partition 7 when it rotates is indicated by the direction of the hour hand of a clock. When looking directly at the first drive disk 91, the vertical direction is at the 12 o'clock position and the vertical direction is at the 6 o'clock position. The same applies to the position of the partition 7 when it rotates in the following text, and will not be described in detail again.

[0064] In one embodiment of the present invention, the specific implementation scenario is as follows:

[0065] When the first drive mechanism 5 drives the first component 4 to rotate, the ends of the slide rods 92 of each second component 8 move on the first annular track 97. When the slide rod 92 moves to the four o'clock position of the first annular track 97 and continues to move, the protrusion 98 on it will push the slide rod 92 to move. The movement of the slide rod 92 drives the second component 8 to move to the first position and compresses the spring 96. When the slide rod 92 moves to the eight o'clock position of the first annular track 97 and continues to move, the end of the slide rod 92 disengages from the protrusion 98, the spring 96 is released from force and pushes the sliding sleeve 93 to drive the second component 8 to move to the second position.

[0066] As the dust-laden droplets move towards the first component 4 under the propulsion of airflow and their own weight, most of the dust-laden droplets will fall mainly to the position between the four o'clock and eight o'clock positions of the first component 4. At the same time, a large amount of liquid accumulates at this position, and after the liquid level rises, some dust-laden droplets will easily flow out directly through the gas channel. In the above-described embodiment, when the partition 7 moves from the four o'clock position to the eight o'clock position, the second component 8 can close the fourth channel 72 to reduce the amount of dust-laden liquid flowing out of the gas channel.

[0067] It should be noted that there is no restriction on the position of the protrusion 98 for opening and closing the fourth channel 72. The setting of its position determines the time and range during which the gas channel is closed during one rotation of the baffle 7, and can be set according to actual needs.

[0068] In one embodiment of the present invention, a third component 10 is also installed on the partition 7, such as... Figures 7-11 As shown, the third component 10 includes two side plates 101, which can be moved to a third position and a fourth position respectively. When the side plate 101 is moved to the third position, the fourth channel 72 adjacent to the side plate 101 is closed. When the side plate 101 is moved to the fourth position, the fourth channel 72 adjacent to the side plate 101 is opened. The third component 10 is connected to a C-drive component 11 for driving its movement.

[0069] In one embodiment of the present invention, one side of each of the two side plates 101 is slidably connected to both sides of the same partition 7. Each of the two side plates 101 has a seventh channel 102 with the same cross-sectional size as the fourth channel 72. One side of each of the two side plates 101 is connected to the output end of the C-drive component 11. When the partition 7 rotates to the two o'clock position, the C-drive component 11 drives the upper side plate 101 of the third component 10 to move to the third position. When the partition 7 rotates to the four o'clock position, the C-drive component 11 drives the lower side plate 101 of the third component 10 to move to the third position. When the partition 7 rotates to the eight o'clock position, the C-drive component 11 drives the lower side plate 101 of the third component 10 to move to the third position. When the partition 7 rotates to the ten o'clock position, the C drive component 11 drives the upper side plate 101 of the third component 10 to move to the fourth position. In this embodiment, the difference between the third component 10 and the second component 8 is that when the two fourth channels 72 on the partition 7 rotate from the two o'clock position to the four o'clock position, the upper fourth channel 72 is closed and the lower fourth channel 72 is opened. When the partition 7 rotates from the eight o'clock position to the ten o'clock position, the same principle applies, so that when the dust-laden droplets move towards the first component 4 under the propulsion of the airflow and the action of their own weight, the amount of dust-laden droplets flowing out of the gas channel after falling on the partition 7 is further reduced.

[0070] In one embodiment of the present invention, the C-drive component 11 includes a second drive disk 111, one side of which is fixedly connected to one end of the support rod 52, and the second drive disk 111 and the support rod 52 are coaxial. The C-drive component 11 also includes a second rotating shaft 112, with two brackets rotatably connected to the two ends of the second rotating shaft 112. One side of the two brackets is fixedly connected to one side of the partition 7. A gear 113 is fixedly connected to one end of the second rotating shaft 112. A second annular track 114 is provided on the side of the second drive disk 111. Four sector racks 115 are provided on the second annular track 114. The four sector racks 115 are respectively located at the two o'clock, four o'clock, eight o'clock and ten o'clock positions of the second annular track 114. When the partition 7 rotates, it drives the gear 113 to mesh with the four sector racks 115 in sequence.

[0071] In one embodiment of the present invention, a third bevel gear is fixedly connected to one end of the second rotating shaft 112, a fourth bevel gear is meshed with one side of the third bevel gear, a third rotating shaft 116 is fixedly connected to one side of the fourth bevel gear, the third rotating shaft 116 is rotatably connected to one side of the partition plate 7, a first cam 117 and a second cam 118 are fixedly connected to the third rotating shaft 116, and a U-shaped frame 119 is fixedly connected to one side of each of the two side plates 101. One side of the first cam 117 and one side of the second cam 118 respectively abut against the inner side of the two U-shaped frames 119, and the included angle between the first cam 117 and the second cam 118 is 90°.

[0072] In one embodiment of the present invention, the specific implementation scenario is as follows:

[0073] Please see Figure 7-11 ,like Figure 7 The observation angle shown indicates that partition 7 is located at the twelve o'clock position. Figure 11 The first figure shows that the side plates 101 on both sides of the partition 7 are in the fourth position. When the partition 7 moves to the two o'clock position, the gear 113 meshes with the sector rack 115 and drives the second rotating shaft 112 to rotate, which in turn drives the third rotating shaft 116 to rotate 90°. The situation after rotation is shown in the figure. Figure 11 In the second figure, the side panel 101 on the left (corresponding to the side panel 101 above when the partition 7 is at the two o'clock position) moves to the third position. When the partition 7 moves to the four o'clock position, the situation after rotation is shown in the figure. Figure 11 In the third figure, the side panel 101 on the right (corresponding to the side panel 101 below when the partition 7 is at the four o'clock position) has moved to the third position. When the partition 7 moves to the eight o'clock position, the situation after rotation is shown in the figure. Figure 11 In the fourth figure, the side panel 101 on the left (corresponding to the side panel 101 below when the partition 7 is at the eight o'clock position) moves to the fourth position. When the partition 7 moves to the ten o'clock position, the situation after rotation is shown in the figure. Figure 11 In the first figure, the side plate 101 on the right (the side plate 101 above the partition 7 when it is at the eight o'clock position) moves to the fourth position, and the side plate 101 is adjusted by rotating in this way.

[0074] It should be noted that, in the embodiment of the third component 10 described above, the position of the four sector racks 115 is merely a specific example provided in the implementation of the present invention, and the installation position of the four sector racks 115 is not limited.

[0075] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A brushless DC motor duct with a dust removal structure, comprising a spray unit (2) and a fan unit (3) installed inside the duct (1), characterized in that, It also includes a gas-liquid separation unit installed inside the air duct (1) and located between the spray unit (2) and the fan unit (3), the gas-liquid separation unit comprising: The first component (4) has a funnel-shaped longitudinal section. The first component (4) is coaxially arranged with the air duct (1). The large end of the first component (4) faces the spray unit (2). The outer side of the large end of the first component (4) is rotatably connected to the inner wall of the air duct (1). The first component (4) separates the channels in the air duct (1) to form a first channel (12) near the spray unit (2) and a second channel (13) near the fan unit (3). The small end of the first component (4) is connected to a first drive mechanism (5) for driving it to rotate around the axis of the air duct (1). Several strip-shaped airbags (6) are fixedly installed on the inner surface of the first component (4) in a ring array. A partition (7) is provided between adjacent strip-shaped airbags (6). One side of the partition (7) is fixedly connected to the inner surface of the first component (4). A gas channel connecting the first channel (12) and the second channel (13) is opened on the partition (7) and the first component (4). The strip-shaped airbags (6) are filled with gas of volume V1, and they satisfy the following: Where V is the size of the space occupied by the inner cavity of the strip-shaped airbag (6) when it is fully inflated.

2. The brushless DC motor fan duct with a dust removal structure according to claim 1, characterized in that, An annular plate (41) is fixedly installed on the large end of the first component (4). A groove (42) for liquid flow is formed between the annular plate (41) and the large end of the first component (4). A first opening (43) is provided on the annular plate (41). A collection chamber (44) is provided at the bottom of the air duct (1) located on one side of the first opening (43).

3. The brushless DC motor fan duct with a dust removal structure according to claim 1, characterized in that, The partition (7) has a third channel (71) inside, and a fourth channel (72) connected to the third channel (71) and the first channel (12) is opened on both sides of the partition (7). The first component (4) has a fifth channel (45) connected to the second channel (13) and the third channel (71).

4. A brushless DC motor duct with a dust removal structure according to claim 3, characterized in that, The fourth channel (72) consists of several through holes with a circular or polygonal cross-section, and the distance between adjacent through holes is greater than the maximum width of the through hole.

5. A brushless DC motor fan duct with a dust removal structure according to claim 4, characterized in that, The partition (7) is also equipped with a second component (8), which is movable to a first position and a second position. When the second component (8) moves to the first position, the fourth channel (72) is closed. When the second component (8) moves to the second position, the fourth channel (72) is opened. The second component (8) is connected to a B drive component (9) for driving its movement.

6. A brushless DC motor duct with a dust removal structure according to claim 5, characterized in that, The second component (8) is a U-shaped baffle (81). The inner surface of the U-shaped baffle (81) is slidably connected to both sides of the partition (7). A sixth channel (82) with the same cross-sectional size as the fourth channel (72) is opened on both sides of the U-shaped baffle (81). The U-shaped baffle (81) is connected to the output end of the B drive component (9).

7. A brushless DC motor duct with a dust removal structure according to claim 6, characterized in that, The B drive component (9) includes a first drive disk (91), one side of which is fixedly connected to one end of the support rod (52), and the first drive disk (91) and the support rod (52) are coaxial; The B drive component (9) further includes a slide rod (92), one end of which is fixedly connected to one side of a U-shaped baffle (81). A sliding sleeve (93) is fixedly connected to one side of the U-shaped baffle (81). A guide rod (94) is slidably connected inside the sliding sleeve (93). A fixing block (95) is fixedly connected to one end of the guide rod (94). The fixing block (95) is fixedly connected to one side of the partition (7). A spring (96) is sleeved on the surface of the guide rod (94) located between the sliding sleeve (93) and the fixing block (95). A first annular track (97) is provided on the side of the first drive disk (91). A protrusion (98) is provided on the first annular track (97). One end of the slide rod (92) abuts against the surface of the first annular track (97).

8. A brushless DC motor duct with a dust removal structure according to claim 4, characterized in that, A third component (10) is also installed on the partition (7). The third component (10) includes two side plates (101). One side of each side plate (101) is slidably connected to both sides of the same partition (7). Each side plate (101) has a seventh channel (102) with the same cross-sectional size as the fourth channel (72). The two side plates (101) can move to the third position and the fourth position respectively. When the side plate (101) moves to the third position, the fourth channel (72) adjacent to the side plate (101) is closed. When the side plate (101) moves to the fourth position, the fourth channel (72) adjacent to the side plate (101) is opened. The third component (10) is connected to a C-drive component (11) for driving its movement.

9. A brushless DC motor duct with a dust removal structure according to claim 8, characterized in that, The C-drive component (11) includes a second drive disk (111), one side of which is fixedly connected to one end of the support rod (52), and the second drive disk (111) and the support rod (52) are coaxial. The C-drive component (11) further includes a second rotating shaft (112). Two supports are rotatably connected to the two ends of the second rotating shaft (112). One side of the two supports is fixedly connected to one side of the partition (7). A gear (113) is fixedly connected to one end of the second rotating shaft (112). A second annular track (114) is provided on the side of the second drive disk (111). Four fan-shaped racks (115) are provided on the second annular track (114). When the partition (7) rotates, it drives the gear (113) to mesh with the four fan-shaped racks (115) in sequence.

10. A brushless DC motor duct with a dust removal structure according to claim 9, characterized in that, A third bevel gear is fixedly connected to one end of the second rotating shaft (112), a fourth bevel gear is meshed with one side of the third bevel gear, and a third rotating shaft (116) is fixedly connected to one side of the fourth bevel gear. The third rotating shaft (116) is rotatably connected to one side of the partition plate (7). A first cam (117) and a second cam (118) are fixedly connected to the third rotating shaft (116). A U-shaped frame (119) is fixedly connected to one side of each of the two side plates (101). One side of the first cam (117) and one side of the second cam (118) abut against the inner side of the two U-shaped frames (119), respectively.

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