Air purifying device and control method and control device therefor

Abstract

The application relates to the technical field of air purification, and discloses an air purification device and a control method and control device thereof. The air purification device comprises a main body structure which can rotate around an axis, a cleaning device arranged on one side of the main body structure, wherein the cleaning device comprises a reel and a cleaning brush; a driving device used for driving the main body structure and / or the reel to rotate, wherein the driving device has a first working state and a second working state; and a first filter screen, one end of which is connected with the reel and the other end of which is connected with the main body structure, wherein the first filter screen has a first position which is arranged around the outside of the main body structure and a second position which is wound on the reel, and the cleaning brush is arranged on a winding path of the first filter screen from the first position to the second position and is adapted to contact the first filter screen. The application can brush off dust which is in close contact with the first filter screen, and the cleaning effect is good compared with related technologies.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to air purification devices and their control methods and devices. Background Technology

[0002] Air purifiers suffer from problems such as short filter lifespan, unpleasant odors, and reduced airflow. The root cause is that the filter pores become clogged with dust, especially the pre-filter, which clogs very quickly, impacting the user experience. Related technologies typically use a vacuum cleaner to remove some of the dust from the filter surface. However, because the dust is in close contact with the filter, vacuuming alone cannot completely remove the dust from the filter surface. Summary of the Invention

[0003] In view of this, the present invention provides an air purification device and its control method and control device to solve the problem in the related art of not being able to completely remove dust from the surface of the filter.

[0004] In a first aspect, the present invention provides an air purification device, comprising:

[0005] The main structure can rotate around its axis;

[0006] A cleaning device is provided on one side of the main structure, and the cleaning device includes a roller and a cleaning brush.

[0007] A driving device for driving the main structure and / or the reel to rotate, the driving device having a first working state and a second working state;

[0008] The first filter screen has one end connected to the spool and the other end connected to the main structure. The first filter screen has a first position surrounding the main structure and a second position wound on the spool. The cleaning brush is disposed on the winding path of the first filter screen from the first position to the second position and is adapted to contact the first filter screen.

[0009] When the drive device is in the first working state, the first filter screen switches from the first position to the second position; when the drive device is in the second working state, the first filter screen switches from the second position to the first position.

[0010] Beneficial effects: When the air purifier is working normally, the first filter is in the first position surrounding the main structure. External air enters through the air inlet of the air purifier, passes through the first filter, and then enters the main structure. After the first filter has been used for a period of time, the drive device is activated and enters the first working state. The main structure and the scroll rotate simultaneously in the forward direction, and the first filter switches from the first position to the second position. The first filter gradually leaves the main structure and winds onto the scroll. During this switching process, the first filter continuously passes over the cleaning brush, which remains stationary, cleaning the surface of the first filter and removing dust that is in close contact with it.

[0011] After the first filter screen switches to the second position, the first cleaning of the first filter screen is completed. Then, the drive device switches to the second working state, and the main structure and the roller rotate in opposite directions at the same time. The first filter screen switches from the second position to the first position. The first filter screen gradually leaves the roller and wraps around the main structure. During the process of switching from the second position to the first position, the first filter screen continuously passes by the cleaning brush. The cleaning brush does not move and cleans the surface of the first filter screen again. When the first filter screen switches to the first position, the second cleaning of the first filter screen is completed.

[0012] Therefore, this air purification device can brush away dust that is in close contact with the first filter, and its cleaning effect is better than that of related technologies.

[0013] In one alternative embodiment, the cleaning brush is disposed on both sides of the first filter screen and simultaneously contacts both sides of the first filter screen.

[0014] Beneficial effects: By making the cleaning brush contact both sides of the first filter at the same time, both sides of the first filter can be cleaned simultaneously, further improving cleaning efficiency.

[0015] In one alternative embodiment, the cleaning device further includes a suction port located near the cleaning brush and connected to the suction device.

[0016] Beneficial effects: By setting up a suction port that is connected to the vacuuming device, and with the suction port close to the cleaning brush, the dust that falls off the first filter after the cleaning brush cleans the first filter is sucked into the vacuuming device through the suction port.

[0017] In one alternative embodiment, the cleaning device includes a housing with an opening for the first filter to pass through, and the spool and the cleaning brush are disposed inside the housing.

[0018] Beneficial effects: The roller and cleaning brush are housed inside the casing, and the cleaning device can be pre-assembled into a whole and then installed on one side of the main structure. The casing can also protect the roller and cleaning brush.

[0019] In one alternative embodiment, the housing includes a cylindrical portion and a guide portion disposed on one side of the cylindrical portion, the guide portion extending radially along the cylindrical portion, and the end of the guide portion away from the cylindrical portion forming the opening.

[0020] Beneficial effect: The guide section can guide the movement of the first filter screen, ensuring that the first filter screen can be wound onto the spool or leave the spool and wrap around the outside of the main structure.

[0021] In one alternative embodiment, the driving device includes a rotary motor for driving the main structure to rotate and a reel motor for driving the reel to rotate.

[0022] Beneficial effects: The rotary motor is used to drive the main structure to rotate, and the reel motor is used to drive the reel to rotate. The simultaneous operation of the rotary motor and the reel motor ensures that the first filter screen can be switched from the first position to the second position, and from the second position to the first position.

[0023] In one alternative embodiment, the main structure includes a second filter screen, the rotary motor is used to drive the second filter screen to rotate, and one end of the first filter screen is connected to the second filter screen.

[0024] Beneficial effects: The main structure includes a second filter. When the air purifier is working normally, the first filter surrounds the second filter. After the air enters from the air inlet, it is first filtered by the first filter and then filtered again by the second filter. The filtered air is blown out of the air outlet by the action of the impeller. Since the first filter has already filtered out some dust, the service life of the second filter can be extended.

[0025] In one alternative embodiment, the second filter screen is provided with a fixing post, and one end of the first filter screen is fixed to the fixing post.

[0026] Beneficial effect: The setting of the fixing column makes it easy to fix one end of the first filter screen.

[0027] In one alternative implementation, the reel motor is connected to the top of the reel.

[0028] Beneficial effects: By connecting the roller motor to the top of the roller, a larger air intake can be set at the bottom of the roller, and the roller motor does not interfere with the dust collection device.

[0029] Secondly, the present invention also provides a control method for an air purification device, applied to the aforementioned air purification device, the control method comprising:

[0030] Obtain the airflow of the air purifier;

[0031] Determine whether the air volume is lower than a preset value;

[0032] If so, control the drive device to work and put the drive device in a first working state. When the first filter screen switches from the first position to the second position, control the drive device to switch to a second working state.

[0033] Beneficial Effects: When the airflow of the air purifier is lower than the preset value, it indicates that the first filter is clogged. At this time, the drive unit is activated and enters the first operating state. The main structure and the scroll rotate simultaneously in the forward direction. The first filter switches from the first position to the second position, gradually leaving the main structure and winding onto the scroll. During this switching process, the first filter continuously passes over the cleaning brush, which remains stationary, cleaning the surface of the first filter and removing dust that is in close contact with it. Once the first filter switches to the second position, the first cleaning of the first filter is complete. Afterward, the drive unit switches to the second operating state, and the main structure and the scroll rotate simultaneously in the reverse direction. The first filter switches from the second position to the first position, gradually leaving the scroll and winding around the main structure. During this switching process, the first filter continuously passes over the cleaning brush, which remains stationary, cleaning the surface of the first filter again. Once the first filter switches to the first position, the second cleaning of the first filter is complete.

[0034] Therefore, the control method of this air purification device can automatically clean the first filter, improving the user experience.

[0035] Thirdly, the present invention also provides a control device for an air purification device, applied to the air purification device, the control device comprising:

[0036] The acquisition module is used to acquire the air volume of the air purifier.

[0037] The judgment module is used to determine whether the air volume is lower than a preset value;

[0038] The execution module is used to control the drive device to work and put the drive device into a first working state when the air volume is lower than a preset value, and to control the drive device to switch to a second working state after the first filter screen is switched from the first position to the second position.

[0039] Beneficial Effects: When the airflow of the air purifier is lower than the preset value, it indicates that the first filter is clogged. At this time, the actuator activates the drive unit and puts it in the first working state. The main structure and the scroll rotate forward simultaneously, and the first filter switches from the first position to the second position. The first filter gradually leaves the main structure and winds onto the scroll. During the switching process, the first filter continuously passes over the cleaning brush, which remains stationary, cleaning the surface of the first filter and removing dust that is in close contact with it. When the first filter switches to the second position, the first cleaning of the first filter is completed. Afterward, the drive unit switches to the second working state, and the main structure and the scroll rotate in opposite directions simultaneously. The first filter switches from the second position to the first position, gradually leaving the scroll and winding around the main structure. During the switching process, the first filter continuously passes over the cleaning brush, which remains stationary, cleaning the surface of the first filter again. When the first filter switches to the first position, the second cleaning of the first filter is completed. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of an air purification device according to an embodiment of the present invention;

[0042] Figure 2 for Figure 1 The image shows a cross-sectional view of the air purification device.

[0043] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0044] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0045] Figure 5 This is a top sectional view of the air purification device when the first filter is in the first position.

[0046] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0047] Figure 7 This is a top sectional view of the air purification device when the first filter is in the second position.

[0048] Figure 8 for Figure 7 Enlarged view of point D in the middle;

[0049] Figure 9 This is a flowchart illustrating a control method for an air purification device according to an embodiment of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Roller; 2. Cleaning brush; 3. First filter; 4. Housing; 5. Air inlet; 6. Air outlet; 7. Impeller; 8. Suction port; 9. Suction pipe; 10. Outer shell; 1001. Opening; 1002. Cylindrical part; 1003. Guide part; 11. Rotary motor; 12. Roller motor; 13. Second filter; 14. Fixing column. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Air purifiers suffer from problems such as short filter lifespan, unpleasant odors, and reduced airflow. The root cause is that the filter pores become clogged with dust, especially the pre-filter, which clogs very quickly, impacting the user experience. Related technologies typically use a vacuum cleaner to remove some of the dust from the filter surface. However, because the dust is in close contact with the filter, vacuuming alone cannot completely remove the dust from the filter surface.

[0054] The following is combined with Figures 1 to 9 The following describes embodiments of the present invention.

[0055] According to an embodiment of the present invention, an air purification device is provided, including a main structure, a cleaning device, a driving device, and a first filter 3.

[0056] The main structure is rotatable about its axis; a cleaning device is located on one side of the main structure, and the cleaning device includes a roller 1 and a cleaning brush 2; a driving device is used to drive the main structure and / or the roller 1 to rotate, and the driving device has a first working state and a second working state; one end of the first filter screen 3 is connected to the roller 1 and the other end is connected to the main structure, the first filter screen 3 has a first position surrounding the main structure and a second position wound on the roller 1, and the cleaning brush 2 is located on the winding path of the first filter screen 3 from the first position to the second position and is adapted to contact the first filter screen 3.

[0057] When the drive device is in the first working state, the first filter 3 switches from the first position to the second position; when the drive device is in the second working state, the first filter 3 switches from the second position to the first position.

[0058] In this embodiment, when the air purification device is working normally, such as Figure 5 and Figure 6 As shown, the first filter 3 is positioned in a first position surrounding the main structure. External air enters through the air inlet 5 of the air purifier, is filtered by the first filter 3, and then enters the main structure. After the first filter 3 has been used for a period of time, the drive device is activated and enters a first working state. The main structure and the roller 1 rotate simultaneously in the forward direction, and the first filter 3 switches from the first position to the second position, as shown... Figure 7 and Figure 8 As shown, the first filter screen 3 gradually leaves the main structure and winds onto the scroll 1. During the transition from the first position to the second position, the first filter screen 3 continuously passes by the cleaning brush 2, which remains stationary, cleaning the surface of the first filter screen 3 and removing dust that is in close contact with it. When the first filter screen 3 switches to the second position, the first cleaning of the first filter screen 3 is completed. Afterwards, the drive device switches to the second working state, and the main structure and the scroll 1 rotate in opposite directions simultaneously. The first filter screen 3 switches from the second position to the first position, gradually leaving the scroll 1 and winding around the main structure. During this transition, the first filter screen 3 continuously passes by the cleaning brush 2, which remains stationary, cleaning the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0059] Therefore, this air purification device can brush away dust that is in close contact with the first filter 3, and its cleaning effect is better than that of related technologies.

[0060] It should be noted that forward rotation can be clockwise, and reverse rotation can be counterclockwise.

[0061] It should be noted that since one end of the first filter screen 3 needs to be connected to the main structure, it is unlikely that the first filter screen 3 will be completely wound on the roller 1. The second position is when only one end of the first filter screen 3 is connected to the main structure and all other parts are separated from the main structure.

[0062] In one embodiment, such as Figure 1 As shown, the air purification device includes a housing 4, on which an air inlet 5 and an air outlet 6 are provided. The main structure, cleaning device, and impeller 7 are all housed inside the housing 4.

[0063] The air purification device in this embodiment is designed with air intake from all four sides and air outlet from the top.

[0064] In one embodiment, such as Figure 6 and Figure 8 As shown, the cleaning brush 2 is located on both sides of the first filter screen 3 and simultaneously contacts both sides of the first filter screen 3.

[0065] In this embodiment, by making the cleaning brush 2 contact both sides of the first filter 3 simultaneously, both sides of the first filter 3 can be cleaned at the same time, further improving the cleaning efficiency.

[0066] Specifically, after the first filter 3 has been used for a period of time, the drive device is activated and enters the first working state. The main structure and the scroll 1 rotate forward simultaneously, and the first filter 3 switches from the first position to the second position. The first filter 3 gradually leaves the main structure and is wound onto the scroll 1. During the switching process from the first position to the second position, the two sides of the first filter 3 continuously pass by the cleaning brush 2, which remains stationary, and simultaneously cleans both sides of the first filter 3, removing dust that is in close contact with the first filter 3. When the first filter 3 switches to the second position, the first cleaning of the first filter 3 is completed. Then the drive device switches to the second working state, and the main structure and the roller 1 rotate in opposite directions at the same time. The first filter screen 3 switches from the second position to the first position. The first filter screen 3 gradually leaves the roller 1 and wraps around the main structure. During the process of the first filter screen 3 switching from the second position to the first position, the two sides of the first filter screen 3 continuously pass by the cleaning brush 2. The cleaning brush 2 does not move and cleans the two sides of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0067] Of course, in one embodiment not shown in the figure, the cleaning brush 2 may only contact one side of the surface of the first filter 3.

[0068] In one embodiment, the cleaning brushes 2 on both sides of the first filter 3 are symmetrically arranged.

[0069] In one embodiment, the cleaning device is further provided with a suction port 8, which is close to the cleaning brush 2 and is connected to the suction device.

[0070] In this embodiment, by providing a suction port 8, which is connected to a vacuuming device, and the suction port 8 is close to the cleaning brush 2, after the cleaning brush 2 cleans the first filter screen 3, the dust that falls off the first filter screen 3 is sucked into the vacuuming device through the suction port 8.

[0071] Specifically in one embodiment, such as Figure 2 and Figure 4As shown, the vacuuming device includes a vacuum pipe 9, a vacuum fan, and a dust collection box. The dust collection box is detachably connected to the outer shell 10 of the air purifier. After the cleaning brush 2 cleans the first filter 3, the dust that falls off the first filter 3 is sucked into the vacuum pipe 9 through the vacuum port 8 and collected by the dust collection box. Users only need to pull or remove the dust collection box from the air purifier periodically and empty the dust inside, which is convenient for users to clean the dust.

[0072] In one embodiment, the cleaning device includes a housing 10, which has an opening 1001 for a first filter 3 to pass through, and a roller 1 and a cleaning brush 2 are disposed inside the housing 10.

[0073] In this embodiment, the roller 1 and the cleaning brush 2 are housed inside the housing 10. The cleaning device can be pre-assembled into a whole and then installed on one side of the main structure. The housing 10 can also protect the roller 1 and the cleaning brush 2.

[0074] In one embodiment, the housing 10 includes a cylindrical portion 1002 and a guide portion 1003 disposed on one side of the cylindrical portion 1002. The guide portion 1003 extends in the radial direction of the cylindrical portion 1002, and one end of the guide portion 1003 away from the cylindrical portion 1002 forms an opening 1001.

[0075] In this embodiment, the guide portion 1003 can guide the movement of the first filter 3, ensuring that the first filter 3 can be wound onto the spool 1 or leave the spool 1 and surround the main structure.

[0076] Of course, in one embodiment not shown in the figures, the housing 10 may only include a cylindrical portion 1002, which has an opening 1001.

[0077] In one embodiment, the driving device includes a rotary motor 11 for driving the main structure to rotate and a reel motor 12 for driving the reel 1 to rotate.

[0078] In this embodiment, the rotary motor 11 is used to drive the main structure to rotate, and the roller motor 12 is used to drive the roller 1 to rotate. The rotary motor 11 and the roller motor 12 work simultaneously to ensure that the first filter screen 3 can be switched from the first position to the second position, and from the second position to the first position.

[0079] Specifically, after the first filter 3 has been used for a period of time, the rotary motor 11 and the winding motor 12 are simultaneously rotated in the forward direction, causing the main structure and the winding shaft 1 to rotate in the forward direction simultaneously. The first filter 3 switches from the first position to the second position, gradually leaving the main structure and winding onto the winding shaft 1. During the switching process from the first position to the second position, the first filter 3 continuously passes through the cleaning brush 2, which remains stationary, cleaning the surface of the first filter 3 and removing dust that is in close contact with it. When the first filter 3 switches to the second position, the first cleaning of the first filter 3 is completed. Then, the rotary motor 11 and the roller motor 12 rotate in opposite directions simultaneously, driving the main structure and the roller 1 to rotate in opposite directions simultaneously. The first filter screen 3 switches from the second position to the first position. The first filter screen 3 gradually leaves the roller 1 and wraps around the main structure. During the process of the first filter screen 3 switching from the second position to the first position, it continuously passes through the cleaning brush 2. The cleaning brush 2 remains stationary and cleans the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0080] In the first embodiment, which is not shown in the figure, the driving device only includes a rotary motor 11 that drives the main structure to rotate. This embodiment needs to satisfy the requirement that the first filter screen 3 has a certain degree of rigidity and elasticity.

[0081] Specifically, after the first filter 3 has been used for a period of time, the rotary motor 11 rotates in the forward direction, causing the main structure to rotate in the forward direction. Since one end of the first filter 3 is connected to the roller 1, the roller 1 rotates in the forward direction under the action of the first filter 3, and the filter 3 gradually winds onto the roller 1. The first filter 3 switches from the first position to the second position. During the switching process, the first filter 3 continuously passes through the cleaning brush 2, which remains stationary, and cleans the surface of the first filter 3, removing the dust that is in close contact with the first filter 3. When the first filter 3 switches to the second position, the first cleaning of the first filter 3 is completed. Then, the rotary motor 11 is rotated in the opposite direction, causing the main structure to rotate in the opposite direction. Since one end of the first filter screen 3 is connected to the main structure, the first filter screen 3 will gradually roll up outside the main structure. The first filter screen 3 switches from the second position to the first position. During the process of switching from the second position to the first position, the first filter screen 3 continuously passes through the cleaning brush 2. The cleaning brush 2 remains stationary and cleans the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0082] In the second embodiment (not shown in the figure), the driving device includes only a roller motor 12 that drives the roller 1 to rotate. This embodiment requires that the first filter screen 3 has a certain degree of rigidity and elasticity.

[0083] Specifically, after the first filter screen 3 has been used for a period of time, the roller motor 12 rotates in the forward direction, causing the roller 1 to rotate in the forward direction. This causes the first filter screen 3 to gradually wind onto the roller 1. Since one end of the first filter screen 3 is connected to the roller 1 and the other end is connected to the main structure, the main structure rotates in the forward direction under the action of the first filter screen 3. The first filter screen 3 switches from the first position to the second position. During this switching process, the first filter screen 3 continuously passes through the cleaning brush 2, which remains stationary, cleaning the surface of the first filter screen 3 and removing dust that is in close contact with it. When the first filter screen 3 switches to the second position, the first cleaning of the first filter screen 3 is completed. Then, the roller motor 12 is rotated in reverse, causing the roller 1 to rotate in reverse. The first filter screen 3 gradually leaves the roller 1. Since one end of the first filter screen 3 is connected to the main structure, it will cause the main structure to rotate in reverse and cause the first filter screen 3 to gradually roll out of the main structure. The first filter screen 3 switches from the second position to the first position. During the process of switching from the second position to the first position, the first filter screen 3 continuously passes through the cleaning brush 2. The cleaning brush 2 does not move and cleans the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0084] In one embodiment, the main structure includes a second filter screen 13, a rotary motor 11 for driving the second filter screen 13 to rotate, and one end of the first filter screen 3 is connected to the second filter screen 13.

[0085] In this embodiment, the main structure includes a second filter screen 13. When the air purification device is working normally, the first filter screen 3 surrounds the second filter screen 13. After the air enters from the air inlet 5, it is first filtered by the first filter screen 3, and then filtered again by the second filter screen 13. The filtered air is blown out to the air outlet 6 under the action of the impeller 7. Since the first filter screen 3 has filtered out some dust, the service life of the second filter screen 13 can be extended.

[0086] In one embodiment, the second filter 13 may include a multi-layer composite filter.

[0087] In one embodiment, the second filter screen 13 is provided with a fixing post 14, and one end of the first filter screen 3 is fixed to the fixing post 14.

[0088] In this embodiment, the fixing post 14 facilitates the fixing of one end of the first filter screen 3.

[0089] In one embodiment, the reel motor 12 is connected to the top of the reel 1.

[0090] In this embodiment, by connecting the roller motor 12 to the top of the roller 1, a larger air intake can be provided at the bottom of the roller 1, and the roller motor 12 does not interfere with the dust collection device.

[0091] According to an embodiment of the present invention, in a second aspect, a control method for an air purification device is also provided, applied to the aforementioned air purification device, such as... Figure 9 As shown, the control methods include:

[0092] Obtain the airflow of the air purifier;

[0093] Determine if the airflow is lower than the preset value;

[0094] If so, control the drive device to work and put the drive device in the first working state. When the first filter 3 switches from the first position to the second position, control the drive device to switch to the second working state.

[0095] In this embodiment, when the airflow of the air purifier is lower than a preset value, it indicates that the first filter 3 is clogged. At this time, the drive device is activated and enters the first working state. The main structure and the scroll 1 rotate forward simultaneously, and the first filter 3 switches from the first position to the second position. The first filter 3 gradually leaves the main structure and is wound onto the scroll 1. During the switching process from the first position to the second position, the first filter 3 continuously passes through the cleaning brush 2, which remains stationary, and cleans the surface of the first filter 3, removing dust that is in close contact with the first filter 3. When the first filter 3 switches to the second position, the first cleaning of the first filter 3 is completed. Then the drive device switches to the second working state, and the main structure and the roller 1 rotate in opposite directions at the same time. The first filter screen 3 switches from the second position to the first position. The first filter screen 3 gradually leaves the roller 1 and wraps around the main structure. During the process of the first filter screen 3 switching from the second position to the first position, it continuously passes through the cleaning brush 2. The cleaning brush 2 does not move and cleans the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0096] Therefore, the control method of this air purification device can automatically clean the first filter 3, improving the user experience.

[0097] In one embodiment, the air purifier operates normally when the air volume is greater than or equal to a preset value.

[0098] In one specific embodiment, the driving device includes a rotary motor 11 for driving the main structure to rotate and a reel motor 12 for driving the reel 1 to rotate.

[0099] When the airflow of the air purifier is lower than the preset value, it indicates that the first filter 3 is clogged. At this time, the rotary motor 11 and the roller motor 12 rotate simultaneously in the forward direction, driving the main structure and the roller 1 to rotate simultaneously in the forward direction. The first filter 3 switches from the first position to the second position. The first filter 3 gradually leaves the main structure and is wound onto the roller 1. During the switching process from the first position to the second position, the first filter 3 continuously passes through the cleaning brush 2, which remains stationary, cleaning the surface of the first filter 3 and removing dust that is in close contact with the first filter 3. When the first filter 3 switches to the second position, the first cleaning of the first filter 3 is completed. Then, the rotary motor 11 and the roller motor 12 rotate in opposite directions simultaneously, driving the main structure and the roller 1 to rotate in opposite directions simultaneously. The first filter screen 3 switches from the second position to the first position. The first filter screen 3 gradually leaves the roller 1 and wraps around the main structure. During the process of the first filter screen 3 switching from the second position to the first position, it continuously passes through the cleaning brush 2. The cleaning brush 2 remains stationary and cleans the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0100] In one specific embodiment, the air volume can be detected at the air outlet 6 of the air purifier.

[0101] In one specific embodiment, the air volume can be detected at the air inlet 5 of the air purifier.

[0102] According to an embodiment of the present invention, in a third aspect, a control device for an air purification device is also provided, applied to the aforementioned air purification device, the control device comprising:

[0103] The acquisition module is used to acquire the air volume of the air purifier.

[0104] The judgment module is used to determine whether the air volume is lower than the preset value;

[0105] The execution module is used to control the drive device to work and put the drive device into a first working state when the air volume is lower than the preset value, and to control the drive device to switch to a second working state after the first filter 3 is switched from the first position to the second position.

[0106] In this embodiment, when the airflow of the air purifier is lower than a preset value, it indicates that the first filter 3 is clogged. At this time, the execution module activates the drive device and puts it in the first working state. The main structure and the scroll 1 rotate forward simultaneously, and the first filter 3 switches from the first position to the second position. The first filter 3 gradually leaves the main structure and is wound onto the scroll 1. During the switching process from the first position to the second position, the first filter 3 continuously passes through the cleaning brush 2, which remains stationary, and cleans the surface of the first filter 3, removing dust that is in close contact with the first filter 3. When the first filter 3 switches to the second position, the first cleaning of the first filter 3 is completed. Then the drive device switches to the second working state, and the main structure and the roller 1 rotate in opposite directions at the same time. The first filter screen 3 switches from the second position to the first position. The first filter screen 3 gradually leaves the roller 1 and wraps around the main structure. During the process of the first filter screen 3 switching from the second position to the first position, it continuously passes through the cleaning brush 2. The cleaning brush 2 does not move and cleans the surface of the first filter screen 3 again. When the first filter screen 3 switches to the first position, the second cleaning of the first filter screen 3 is completed.

[0107] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An air purification device, characterized in that, include: The main structure can rotate around its axis; A cleaning device is provided on one side of the main structure, and the cleaning device includes a roller (1) and a cleaning brush (2). A driving device is used to drive the main structure and the scroll (1) to rotate, and the driving device has a first working state and a second working state; The first filter screen (3) is connected at one end to the roller (1) and at the other end to the main structure. The first filter screen (3) has a first position surrounding the main structure and a second position wound on the roller (1). The cleaning brush (2) is disposed on the winding path of the first filter screen (3) from the first position to the second position and is adapted to contact the first filter screen (3). When the drive device is in the first working state, the first filter (3) switches from the first position to the second position. When the drive device is in the second working state, the first filter (3) switches from the second position to the first position.

2. The air purification device according to claim 1, characterized in that, The cleaning brush (2) is located on both sides of the first filter (3) and simultaneously contacts both sides of the first filter (3).

3. The air purification device according to claim 1, characterized in that, The cleaning device is also provided with a suction port (8), which is close to the cleaning brush (2) and is connected to the suction device.

4. The air purification device according to claim 1, characterized in that, The cleaning device includes a housing (10) with an opening (1001) for the first filter (3) to pass through, and the roller (1) and the cleaning brush (2) are disposed inside the housing (10).

5. The air purification device according to claim 4, characterized in that, The outer casing (10) includes a cylindrical portion (1002) and a guide portion (1003) provided on one side of the cylindrical portion (1002). The guide portion (1003) extends in the radial direction of the cylindrical portion (1002), and the end of the guide portion (1003) away from the cylindrical portion (1002) forms the opening (1001).

6. The air purification device according to any one of claims 1 to 5, characterized in that, The driving device includes a rotary motor (11) for driving the main structure to rotate and a reel motor (12) for driving the reel (1) to rotate.

7. The air purification device according to claim 6, characterized in that, The main structure includes a second filter screen (13), and the rotary motor (11) is used to drive the second filter screen (13) to rotate. One end of the first filter screen (3) is connected to the second filter screen (13).

8. The air purification device according to claim 7, characterized in that, The second filter screen (13) is provided with a fixing post (14), and one end of the first filter screen (3) is fixed to the fixing post (14).

9. The air purification device according to claim 6, characterized in that, The reel motor (12) is connected to the top of the reel (1).

10. A control method for an air purification device, characterized in that, The control method, applied to any one of claims 1 to 9, comprises: Obtain the airflow of the air purifier; Determine whether the air volume is lower than a preset value; If so, control the drive device to work and put the drive device in the first working state. When the first filter (3) is switched from the first position to the second position, control the drive device to switch to the second working state.

11. A control device for an air purification apparatus, characterized in that, The control device, applicable to any one of claims 1 to 9, comprises: The acquisition module is used to acquire the air volume of the air purifier. The judgment module is used to determine whether the air volume is lower than a preset value; The execution module is used to control the drive device to work and put the drive device into a first working state when the air volume is lower than a preset value, and to control the drive device to switch to a second working state after the first filter (3) is switched from the first position to the second position.

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