Automatic collection system and method for filter dirt of air purification device

Abstract

The present invention provides an automatic filter dirt collection system and collection method for an air purification device. It includes a two-way fan, an automatic cleaning brush and a shielding device. The shielding device includes a flexible shielding sheet; the flexible shielding sheet has a first shielding position that is located between the first winding shaft and the second winding shaft to block the opening, and a second shielding position that is located between the second winding shaft and the third winding shaft. Because it has a two-way fan and an automatic cleaning brush, the dirt on the surface of the filter device can be automatically blown off or brushed off without manual labor. Compared with the manpower required for traditional replacement or cleaning of filter devices, it is obvious that the automatic filter dirt collection system of the present invention has a high degree of automation, which is conducive to saving labor costs. Moreover, the flexible shielding sheet allows the raised dirt to fly around in the confined space and guides the dirt into the dust box, which can effectively collect the dirt and prevent multiple positions in the shell from being filled with dirt.

Description

Technical Field

[0001] The present invention relates to the technical field of ship air purification, and in particular to an automatic filter screen dirt collection system and a dirt collection method for an air purification device. Background Art

[0002] A marine air purifier is a device that can filter and purify indoor air. Through a built-in filter, typically a mesh filter, it can remove pollutants such as dust particles, bacteria, viruses, and harmful gases from the air, thereby improving the air quality in the corresponding cabin and reducing harm to the human body. After an air purifier has been used for a period of time, a large amount of dust will accumulate on the filter device, so the filter device needs to be cleaned regularly. Usually, a cleaning brush is used to clean the coarse-effect surface on the air inlet side of the filter device or directly replace it. Cleaning and replacement often require manpower. During the cleaning process, dirt inside the housing will fly around, and the dirt can easily move to any place inside the housing, causing dirt to be present in multiple locations within the housing. This not only pollutes and damages the filter device, but also pollutes and damages other components of the filter device. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide an automatic filter dirt collection system and dirt collection method for an air purification device that overcomes the above problems or at least partially solves the above problems. The system can automatically clean the air inlet side surface of the filter device and prevent dirt from flying around during cleaning, so that all dirt can enter the dust box; moreover, when normal air filtration and purification is carried out, the dust box can be closed to prevent the dirt in the dust box from being guided out of the dust box by the airflow.

[0004] Specifically, the present invention provides an automatic filter dirt collection system for an air purification device, comprising a housing, a fan and a filter device disposed within the housing, wherein the fan is disposed in front of the filter device and configured to cause airflow to flow from the rear side of the filter device to the front side of the filter device, wherein the automatic filter dirt collection system further comprises:

[0005] A dust box, the opening of which faces upward, and the dust box is arranged on the lower side of the air inlet side surface of the filter device;

[0006] a first winding shaft rotatably disposed at a front end of the opening of the dust box;

[0007] a second winding shaft rotatably disposed at a rear end of the opening of the dust box;

[0008] a third winding shaft rotatably disposed on an upper end of the air inlet side surface of the filter device;

[0009] A shielding device, the shielding device includes two first connecting ropes, a flexible shielding sheet and two second connecting ropes; the first ends of the two first connecting ropes are fixedly connected to the two ends of the first winding shaft, and the second ends of the two first connecting ropes are fixedly connected to the flexible shielding sheet; the first ends of the two second connecting ropes are fixedly connected to the two ends of the third winding shaft, and the second ends of the two second connecting ropes are fixedly connected to the flexible shielding sheet; the flexible shielding sheet is wound around the second winding shaft, and the flexible shielding sheet has a first shielding position between the first winding shaft and the second winding shaft for shielding the opening, and a second shielding position between the second winding shaft and the third winding shaft.

[0010] Optionally, the fan is a bidirectional fan, configured to controllably force the airflow to flow from the rear side of the filter device to the front side of the filter device when the flexible shielding sheet is in the first shielding position, and to controllably force the airflow to flow from the front side of the filter device to the rear side of the filter device when the flexible shielding sheet is in the second shielding position, so as to drop dirt on the air inlet side surface of the filter device.

[0011] Optionally, the automatic filter dirt collection system of the air purification device further includes:

[0012] A cleaning brush is arranged on the air inlet side surface of the filter device so as to move up and down, and is configured to move up and down in a controlled manner when the flexible shielding sheet is in the second shielding position, so as to drop dirt on the air inlet side surface of the filter device.

[0013] Optionally, the automatic filter dirt collection system of the air purification device further includes:

[0014] A compression block is arranged in the dust box so as to move forward and backward, and is configured to move backward in a controlled manner when the flexible shielding sheet is in the first shielding position, so as to squeeze the dirt in the dust box.

[0015] Optionally, the dust collection box includes:

[0016] a bottom wall, the bottom wall being arranged horizontally;

[0017] a front wall connected to the front end of the bottom wall; the front wall is located on the lower side of the filter device and is sealed to the lower surface of the filter device;

[0018] a rear wall connected to a rear end of the bottom wall;

[0019] a cover plate, wherein the rear end of the cover plate is connected to the upper end of the rear wall, and the front side of the cover plate is the opening;

[0020] Two side walls are arranged on both sides of the bottom wall, and each of the side walls connects the bottom wall, the front wall, the rear wall and the cover plate.

[0021] Optionally, the dust collection box includes:

[0022] a bottom wall, the bottom wall being arranged horizontally;

[0023] a front wall connected to the front end of the bottom wall; the front wall is located on the lower side of the filter device and is sealed to the lower surface of the filter device;

[0024] a rear wall connected to a rear end of the bottom wall;

[0025] Two side walls are provided on both sides of the bottom wall, and each of the side walls is connected to the bottom wall, the front wall, and the rear wall;

[0026] The automatic filter dirt collection system further includes:

[0027] a dustproof plate, the dustproof plate being movably disposed on the compression block, with the rear end of the dustproof plate being located at the rear side of the compression block; the dustproof plate being configured to contact the rear wall and the two side walls to define a compression space in common with the compression block;

[0028] A spring is provided between the dustproof plate and the compression block to urge the rear end of the dustproof plate to be located at the rear side of the compression block.

[0029] Optionally, the automatic filter dirt collection system of the air purification device further includes:

[0030] a first driving device, the first driving device being configured to cause the first winding shaft to rotate in a first direction, the first driving device being a motor;

[0031] a torsion spring disposed on the third winding shaft to cause the third winding shaft to rotate, thereby causing the first winding shaft to rotate in a second direction, the first direction being opposite to the second direction;

[0032] A second driving device is configured to cause the compression block to move forward and backward; the second driving device is a linear motor.

[0033] Optionally, the bottom wall of the dust box includes a first bottom plate and a second bottom plate, the first bottom plate is arranged in front of the second bottom plate, and the second bottom plate is configured to block the gap between the first bottom plate and the rear wall of the dust box;

[0034] An arc-shaped rod is provided on the lower side of the front end of the second bottom plate, the front end of the arc-shaped rod is located on the front side of the second bottom plate, and the front end of the arc-shaped rod is rotatably mounted on the first bottom plate;

[0035] A dirt discharge port is provided on the lower side of the shell at a position corresponding to the dust collecting box.

[0036] Optionally, the first winding shaft is arranged at the lower side of the filter device; and the compression block can be moved to a position at the lower side of the filter device.

[0037] The present invention also provides a method for collecting dirt in the automatic filter dirt collection system for any of the above-mentioned air purification devices, comprising:

[0038] Obtaining the degree of dirt and blockage on the air inlet side surface of the filter device;

[0039] When the dirt blockage degree is greater than a first preset degree value, the first winding shaft and the third winding shaft are controlled to rotate so that the flexible shielding sheet of the shielding device moves from the first shielding position to the second shielding position.

[0040] In the automatic filter dirt collection system and dirt collection method of the air purification device of the present invention, due to the shielding device, when the air purification device is normally filtering and purifying air, the flexible shielding sheet is in a first shielding position that shields the opening of the dust box, so that the dust box is closed and the airflow generated by the operation of the fan does not cause the dirt in the dust box to flow out of the dust box. When cleaning the air inlet side surface of the filter device, the flexible shielding sheet moves to the second shielding position, so that the rear side of the filter device forms an enclosed space. The flexible shielding sheet allows the raised dirt to fly around in the enclosed space and guides the dirt into the dust box, which can effectively collect the dirt and prevent the dirt from being present in multiple positions in the housing.

[0041] Furthermore, the automatic filter dirt collection system and dirt collection method of the air purification device of the present invention have a two-way fan or an automatic cleaning brush, so the dirt on the surface of the filter device can be automatically blown off or brushed off without manual labor. Compared with the manpower required for traditional replacement or cleaning of the filter device, it is obvious that the automatic filter dirt collection system of the present invention has a high degree of automation, which is conducive to saving labor costs and does not require manpower to prevent safety accidents such as personal injury.

[0042] Furthermore, the automatic filter dirt collection system and dirt collection method of the air purification device of the present invention are provided with a compression block that can compress and gather the collected dirt, so that when the dirt in the dust collecting trough is cleaned inward, the cleaning is convenient, and the cleaning process will not cause the dirt to fly around, which facilitates the transfer and processing of the dirt.

[0043] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0045] Figure 1 is a schematic structural diagram of an automatic filter dirt collection system for an air purification device according to one embodiment of the present invention;

[0046] Figure 2 1 is a schematic diagram of the internal structure of an automatic filter dirt collection system of an air purification device according to an embodiment of the present invention; wherein the flexible shielding sheet is in a first shielding position;

[0047] Figure 3 1 is a schematic diagram of the internal structure of an automatic filter dirt collection system of an air purification device according to an embodiment of the present invention; wherein the flexible shielding sheet is in the second shielding position;

[0048] Figure 4 1 is a schematic diagram of the internal structure of an automatic filter dirt collection system for an air purification device according to an embodiment of the present invention; wherein the flexible shielding sheet is in a position separated from the first scraper;

[0049] Figure 5 2 is a schematic structural diagram of a dust collection box of an automatic filter dirt collection system for an air purification device according to an embodiment of the present invention;

[0050] Figure 6 The present invention is a schematic flowchart of a method for collecting dirt from a filter of an air purification device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] Refer to the following Figures 1 to 6To describe the automatic filter dirt collection system and dirt collection method of the air purification device of the embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0052] Unless otherwise expressly defined or limited, terms such as "disposed," "installed," "connected," "connected," "fixed," and "coupled" should be broadly interpreted. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. That is, in the description of this embodiment, the first feature being "above," "above," and "above" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below," "below," or "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0055] Figure 1FIG. 1 is a schematic structural diagram of an automatic filter dirt collection system for an air purification device according to an embodiment of the present invention. Figure 1 As shown, and reference Figures 2 to 5 An embodiment of the present invention provides an automatic filter dirt collection system for an air purification device, comprising a housing 10, a fan 20 and a filter device 30 disposed within the housing 10. The fan 20 is disposed in front of the filter device 30 and is configured to force airflow from the rear side of the filter device 30 to the front side of the filter device 30. The automatic filter dirt collection system also includes a dust box 40, a first winding shaft 51, a second winding shaft 52, a third winding shaft 53, and a shielding device 60.

[0056] The dust box 40 has an upward opening and is positioned below the air inlet side of the filter device 30. A first winding shaft 51 is rotatably positioned at the front end of the opening of the dust box 40. A second winding shaft 52 is rotatably positioned at the rear end of the opening of the dust box 40. A third winding shaft 53 is rotatably positioned at the upper end of the air inlet side of the filter device 30.

[0057] The shielding device 60 includes two first connecting ropes 61, a flexible shielding sheet 62, and two second connecting ropes 63. The first ends of the two first connecting ropes 61 are fixedly connected to the ends of the first winding shaft 51, and the second ends of the two first connecting ropes 61 are fixedly connected to the flexible shielding sheet 62. The first ends of the two second connecting ropes 63 are fixedly connected to the ends of the third winding shaft 53, and the second ends of the two second connecting ropes 63 are fixedly connected to the flexible shielding sheet 62. The flexible shielding sheet 62 is wound around the second winding shaft 52 and has a first shielding position between the first winding shaft 51 and the second winding shaft 52, shielding the opening, and a second shielding position between the second winding shaft 52 and the third winding shaft 53.

[0058] When the automatic filter dirt collection system of the air purification device of the embodiment of the present invention is in operation, the fan 20 is started, causing the air flow to enter the housing 10 from the air inlet 11 on the housing 10. After being filtered and purified by the filter device 30, the air flows out of the housing 10 from the air outlet 12 of the housing 10. At this time, the flexible shielding sheet 62 is in the first shielding position that shields the opening of the dust box 40, so that the dust box 40 is closed. The airflow generated by the operation of the fan 20 will not cause the dirt in the dust box 40 to flow out of the dust box 40. When it is necessary to clean the air inlet side surface of the filter device 30, the flexible shielding sheet 62 moves to the second shielding position, so that the rear side of the filter device 30 forms a closed space. The flexible shielding sheet 62 prevents the raised dirt from flying around in the closed space and guides the dirt into the dust box 40, which can effectively collect the dirt and prevent dirt from being present in multiple positions in the housing 10.

[0059] In some embodiments of the present invention, the fan 20 is a bidirectional fan, configured to controllably force airflow from the rear side of the filter device 30 to the front side of the filter device 30 when the flexible shielding sheet 62 is in the first shielding position, and to controllably force airflow from the front side of the filter device 30 to the rear side of the filter device 30 when the flexible shielding sheet 62 is in the second shielding position, so as to remove dirt from the air inlet side surface of the filter device 30. In other words, when the air purifier is normally filtering and purifying air, the fan 20 rotates in one direction, causing the airflow to flow from the rear side of the filter device 30 to the front side of the filter device 30, thereby purifying the indoor air. When the air inlet side surface of the filter device 30 needs to be cleaned, the fan 20 is reversed, causing the airflow to flow in the opposite direction, thereby blowing off dirt adsorbed on the air inlet side surface of the filter device 30, cleaning the filter device 30, and improving the filtration efficiency of the air purifier.

[0060] In some embodiments of the present invention, Figures 1 to 4 As shown, the automatic filter dirt collection system also includes a cleaning brush 70, which is disposed on the air inlet side surface of the filter device 30 and is configured to move up and down in a controlled manner when the flexible shielding sheet 62 is in the second shielding position to remove dirt from the air inlet side surface of the filter device 30. The cleaning brush 70 can be driven up and down by a driving device to clean the air inlet side surface of the filter device 30, thereby better removing dirt.

[0061] In the embodiment of the air purification device of the present invention, because it is provided with a two-way fan or an automatic cleaning brush, the dirt on the surface of the filter device can be automatically blown off or brushed off without manual labor. Compared with the manpower required for traditional replacement or cleaning of the filter device, it is obvious that the automatic filter dirt collection system of the present invention has a high degree of automation, which is conducive to saving labor costs and preventing safety accidents caused by personal injury without the need for manpower.

[0062] In some embodiments of the present invention, Figure 1 As shown, the automatic filter dirt collection system further includes a compression block 80, which is arranged in the dust box 40 so as to be movable forward and backward. The compression block 80 is configured to be controlled to move backward when the flexible shielding sheet 62 is in the first shielding position, so as to squeeze the dirt in the dust box 40. After the dirt is collected in the dust box 40, the flexible shielding sheet 62 is in the first shielding position to close the opening of the dust box 40, and then the compression block 80 is moved backward to squeeze and compress the dirt in the dust box 40 into a piece. In this way, when the dust in the dust box 40 is taken out, the compressed dirt is taken out as a whole, and there will be no messy dust. That is, when the dirt in the dust collecting trough is cleaned inward, the cleaning is convenient, and the cleaning process will not cause the dirt to fly around, which facilitates the transfer and treatment of the dirt.

[0063] In some embodiments of the present invention, the dust box 40 includes a bottom wall, a front wall, a rear wall, and two side walls. The bottom wall is horizontally disposed. The front wall is connected to the front end of the bottom wall. The front wall is located below the filter device 30 and is sealed to the lower surface of the filter device 30. The rear wall is connected to the rear end of the bottom wall. The two side walls are disposed on either side of the bottom wall, and each side wall is connected to the bottom wall, the front wall, and the rear wall. In this way, the dust box 40 forms a collection space that opens upward.

[0064] In some embodiments of the present invention, the dust box 40 further includes a cover plate, the rear end of which is connected to the upper end of the rear wall, and the front side of the cover plate is an opening of the dust box 40. In this way, the cover plate, the two side walls, the rear wall, and the bottom wall form a compression space, which facilitates the compression of dirt into dirt strips, so that the dirt will not be scattered and will not float or fly around when the dirt is transferred.

[0065] In other embodiments of the present invention, Figure 1 As shown, the automatic filter dirt collection system also includes a dust plate 82 and a spring. The dust plate 82 is mounted on the compression block 80 so as to be movable forward and backward, with the rear end of the dust plate 82 positioned behind the compression block 80. The dust plate 82 is configured to contact the rear wall and both side walls, thereby defining a compression space along the same line with the compression block 80. A spring is positioned between the dust plate 82 and the compression block 80 to urge the rear end of the dust plate 82 to the rear end of the compression block 80.

[0066] In this embodiment of the present invention, the rearward movement of the compression block 80 drives the dust shield 82 backward. The dust shield 82 first contacts the rear wall of the dust box 40, creating a compressed space between the dust shield 82, the two side walls, the rear wall, and the bottom wall. As the compression block 80 continues to move backward, the spring prevents the dust shield 82 from interfering with its continued rearward movement, effectively compressing the dirt. Furthermore, the presence of the dust shield 82 facilitates the upward removal of the compressed dirt strips from the opening of the dust box 40 when it is opened.

[0067] In some embodiments of the present invention, the automatic filter collection system for an air purifier further includes a first drive device and a torsion spring. The first drive device is configured to cause the third winding shaft 53 to rotate in a first direction, and the first drive device is a motor. The torsion spring is disposed on the first winding shaft 51 to cause the first winding shaft 51 to rotate, thereby causing the third winding shaft 53 to rotate in a second direction, the first direction and the second direction being opposite. As the flexible shielding sheet 62 moves from the first shielding position to the second shielding position, the motor drives the third winding shaft 53 to rotate in the first direction, and the torsion spring acts on the first winding shaft 51 and accumulates force. When the flexible shielding sheet 62 moves from the second shielding position to the first shielding position, the motor rotates in the opposite direction, releasing the accumulated force in the torsion spring, which then drives the flexible shielding sheet 62 from the second shielding position to the first shielding position. Because the air purifier performs purification and filtration for a significantly longer period than the filter device 30 is cleaned, the positioning of the torsion spring and the first drive device prevents the torsion spring from accumulating significant force over a longer period of time, thus protecting the torsion spring and increasing its service life.

[0068] In some embodiments of the present invention, the automatic filter dirt collection system of the air purification device further includes a second drive device 81. The second drive device 82 is configured to cause the compression block 80 to move forward and backward. The second drive device 81 is a linear motor.

[0069] In some embodiments of the present invention, Figure 5 As shown, to facilitate the removal of collected dirt from the dust box 40, the bottom wall of the dust box 40 includes a first base plate 41 and a second base plate 42. The first base plate 41 is disposed in front of the second base plate 42, and the second base plate 42 is configured to block the gap between the first base plate 41 and the rear wall of the dust box 40. A curved rod 43 is provided on the lower front side of the second base plate 42. The front end of the curved rod 43 is located in front of the second base plate 42 and is rotatably mounted on the first base plate 41. A dirt discharge port is provided on the lower side of the housing 10 at a position corresponding to the dust box 40. To remove the compressed dirt from the dust box 40, the second base plate 42 is opened through the dirt discharge port. The compression block 80 moves backward, pushing the dirt strip backward, causing the dirt strip to fall downward from the second base plate 42 along the second base plate 42 and flow out of the dust box 40. Furthermore, the provision of the curved rod 43 enables the first bottom plate 41 and the second bottom plate 42 to be coplanar, facilitating the rotation of the second bottom plate 42 and facilitating the second bottom plate 42 to close the gap between the first bottom plate 41 and the rear wall of the dust box 40. In some alternative embodiments, the second bottom plate 42 can also be rotatably mounted to the first bottom plate 41 around its front edge. This arrangement does not easily close the gap between the first bottom plate 41 and the second bottom plate 42. However, the installation scheme with the curved rod 43 ensures a sealed performance, facilitates the collection of dirt in the dust box 40, and prevents dirt from leaking.

[0070] In some embodiments of the present invention, the first winding shaft 51 is disposed below the filter device 30, fully utilizing the space below the filter device 30. Dust falling from the surface of the filter device 30 will not fall onto the first winding shaft 51. Furthermore, when the flexible shielding sheet 62 is in the first shielding position, the opening of the dust box 40 is fully sealed. The compression block 80 can be moved to a position below the filter device 30. This prevents dust from accumulating on the compression block 80, contributing to a compact structure and small size of the air purifier.

[0071] In some embodiments of the present invention, the distance between the first winding axis 51 and the second winding axis 52 is less than the distance between the second winding axis 52 and the third winding axis 53. The length of the flexible shielding sheet 62 is greater than the distance between the second winding axis 52 and the third winding axis 53. This arrangement ensures sealing performance in the first and second shielding positions. Excess length of the flexible shielding sheet 62 can be wound around the corresponding first and third winding axes 51, 53.

[0072] In some embodiments of the present invention, when the fan 20 rotates in the reverse direction to clean the filter device 30, the flexible shielding sheet 62 is in the second shielding position, and dirt easily flies onto the first side surface of the flexible shielding sheet 62. When the air purification device is performing air purification, the flexible shielding sheet 62 is in the first shielding position, with the first side surface of the flexible shielding sheet 62 facing upward, and the fan 20 rotates forward. At this time, the airflow will flow through the first side surface of the flexible shielding sheet 62, causing dirt to fly around. To solve this problem, the automatic filter dirt collection system of the air purification device also includes a fourth winding shaft 54, a first scraper 91 and a second scraper 92. The fourth winding shaft 54 ​​is arranged adjacent to the second winding shaft 52, and the fourth winding shaft 54 ​​is between the first winding shaft 51 and the second winding shaft 52. The height of the fourth winding shaft 54 ​​is higher than the height of the second winding shaft 52. The flexible shielding sheet 62 passes around the upper side of the fourth winding shaft 54 ​​and the lower side of the second winding shaft 52. The first scraper 91 is arranged between the second winding shaft 52 and the fourth winding shaft 54, and cleans the upper surface of the flexible shielding sheet 62 in the section between the fourth winding shaft 54 ​​and the second winding shaft 52, that is, the first scraper 91 is used to clean dirt on the first side surface of the flexible shielding sheet 62.

[0073] In the process of the flexible shielding sheet 62 moving from the second shielding position to the first shielding position, the first scraper 91 cleans the dirt on the first side surface of the flexible shielding sheet 62. After the flexible shielding sheet 62 is completely moved from the second shielding position to the first shielding position, it continues to move so that the first scraper 91 is separated from the first side surface of the flexible shielding sheet 62, and the dirt is passed through the gap between the two second connecting ropes 63 and enters the dust collection box 40. Figure 4Then the flexible shielding sheet 62 is moved in the reverse direction until the flexible shielding sheet 62 returns to the first shielding position, thus completing the cleaning of dirt on the first side surface of the flexible shielding sheet 62 .

[0074] The second scraper 92 is located within the dust box 40, adjacent to the second winding shaft 52, and is used to clean dirt from the second side surface of the flexible shielding sheet 62. The first side surface and the second side surface of the flexible shielding sheet 62 are disposed opposite each other. As the flexible shielding sheet 62 moves from the first shielding position to the second shielding position, the second scraper 92 cleans dirt from the second side surface of the flexible shielding sheet 62, allowing the dirt to enter the dust box 40 directly. This prevents dirt on the second side surface of the flexible shielding sheet 62 from entering the enclosed space.

[0075] In some embodiments of the present invention, the automatic filter dirt collection system of the air purification device further includes a position detection device configured to detect the position of the flexible shielding sheet 62. Specifically, the position detection device includes a first sensing device and two second sensing devices disposed at both ends of the flexible shielding sheet 62. The first sensing device is disposed at the second winding shaft 52. The first sensing device and the second sensing device are configured such that when each second sensing device moves to the second winding shaft 52, the first sensing device generates a signal that controls the start and stop of the first driving device.

[0076] like Figure 5 As shown, an embodiment of the present invention further provides a dirt collection method for the automatic filter dirt collection system of the air purification device in any of the above embodiments, which includes:

[0077] Step S100, obtaining the degree of dirt and blockage on the air inlet side surface of the filter device 30;

[0078] Step S200: When the dirt blockage degree is greater than a first preset degree value, the first winding shaft 51 and the third winding shaft 53 are controlled to rotate so that the flexible shielding sheet 62 of the shielding device 60 moves from the first shielding position to the second shielding position. Figure 3 shown.

[0079] That is to say, when it is necessary to clean the air inlet side surface of the filter device 30, the flexible shielding sheet 62 moves to the second shielding position, so that a closed space is formed on the rear side of the filter device 30. The flexible shielding sheet 62 allows the raised dirt to fly around in the closed space and guides the dirt into the dust box 40, which can effectively collect the dirt and prevent dirt from being present in multiple positions in the shell 10.

[0080] In some embodiments of the present invention, the dirt collection method of the automatic filter dirt collection system of the air purification device further includes:

[0081] Clean the dirt on the air inlet side surface of the filter device 30 so that the dirt on the air inlet side surface of the filter device 30 falls off;

[0082] During or after cleaning the dirt on the air inlet side surface of the filter device 30, the first winding shaft 51 and the third winding shaft 53 are controlled to rotate so as to at least move the flexible shielding sheet 62 of the shielding device 60 from the second shielding position to the first shielding position. Figure 2 shown.

[0083] The cleaning can be repeated multiple times until the dirt and blockage degree of the air inlet side surface of the filter device 30 is less than the second preset degree value, and then the next normal air purification is carried out.

[0084] Specifically, in order to clean the dirt on the first side surface of the flexible shielding sheet 62, the above-mentioned control of the first winding shaft 51 and the third winding shaft 53 to rotate so as to at least move the flexible shielding sheet 62 of the shielding device 60 from the second shielding position to the first shielding position may specifically include:

[0085] The position detection device determines whether the second end of the flexible shielding sheet 62 has moved to the second winding shaft 52, that is, whether the flexible shielding sheet 62 is in the first shielding position. The first end of the flexible shielding sheet 62 is connected to the first connecting rope 61, and the second end of the flexible shielding sheet 62 is connected to the second connecting rope 63.

[0086] If the second end of the flexible shielding sheet 62 moves to the second winding shaft 52 , the first winding shaft 51 and the third winding shaft 53 are controlled to rotate and continue to move for a preset time period, which is arranged to allow the first scraper 91 to disengage from the flexible shielding sheet 62 .

[0087] After a preset time, the first winding shaft 51 and the third winding shaft 53 are controlled to rotate in the reverse direction, and the position detection device is used to determine whether the second end of the flexible shielding sheet 62 moves to the second winding shaft 52;

[0088] If the second end of the flexible shielding sheet 62 moves to the second winding shaft 52, the first winding shaft 51 and the third winding shaft 53 are controlled to stop rotating, and a signal is issued to allow the air purification device to perform air purification.

[0089] In some embodiments of the present invention, the above-mentioned method of obtaining the degree of dirt and blockage on the air inlet side surface of the filter device 30 specifically includes: using a pressure difference detection device to detect the pressure difference on both sides of the filter device 30. If the pressure difference is greater than a first preset difference value, it is determined that the degree of dirt and blockage on the air inlet side surface of the filter device 30 reaches the first preset degree value, and the air inlet side surface of the filter device 30 needs to be cleaned.

[0090] In some embodiments of the present invention, it also includes: using a pressure difference detection device to detect the pressure difference on both sides of the filter device 30. If the pressure difference is less than a second preset difference value, it is determined that the degree of dirt and blockage on the air inlet side surface of the filter device 30 is lower than the second preset degree value, that is, the cleaning of the air inlet side surface of the filter device 30 is completed.

[0091] The dirt on the air inlet side surface of the filter device 30 can be cleaned according to the preset cleaning time, and then the flexible shielding piece 62 of the shielding device 60 is moved from the second shielding position to the first shielding position, and then the pressure difference on both sides of the filter device 30 is obtained. If the pressure difference is less than the second preset difference, the cleaning of the air inlet side surface of the filter device 30 is completed. Otherwise, the flexible shielding piece 62 of the shielding device 60 is moved from the first shielding position to the second shielding position again, and the dirt on the air inlet side surface of the filter device 30 is cleaned again according to the preset cleaning time.

[0092] In some alternative embodiments of the present invention, the method further includes: cleaning the dirt on the air inlet side surface of the filter device 30 for a preset time period, and then determining that the dirt on the air inlet side surface of the filter device 30 has been cleaned.

[0093] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An automatic filter dirt collection system for an air purification device, comprising a housing, a fan and a filter device disposed within the housing, wherein the fan is disposed in front of the filter device and configured to force airflow from the rear side of the filter device to the front side of the filter device, characterized in that: Also includes: A dust box, the opening of which faces upward, and the dust box is arranged on the lower side of the air inlet side surface of the filter device; a first winding shaft rotatably disposed at a front end of the opening of the dust box; a second winding shaft rotatably disposed at a rear end of the opening of the dust box; a third winding shaft rotatably disposed on an upper end of the air inlet side surface of the filter device; A shielding device, the shielding device includes two first connecting ropes, a flexible shielding sheet and two second connecting ropes; the first ends of the two first connecting ropes are fixedly connected to the two ends of the first winding shaft, and the second ends of the two first connecting ropes are fixedly connected to the flexible shielding sheet; the first ends of the two second connecting ropes are fixedly connected to the two ends of the third winding shaft, and the second ends of the two second connecting ropes are fixedly connected to the flexible shielding sheet; the flexible shielding sheet is wound around the second winding shaft, and the flexible shielding sheet has a first shielding position between the first winding shaft and the second winding shaft for shielding the opening, and a second shielding position between the second winding shaft and the third winding shaft.

2. The automatic filter dirt collection system for an air purification device according to claim 1, characterized in that: The fan is a bidirectional fan, which is configured to controllably force the airflow to flow from the rear side of the filter device to the front side of the filter device when the flexible shielding sheet is in the first shielding position, and to controllably force the airflow to flow from the front side of the filter device to the rear side of the filter device when the flexible shielding sheet is in the second shielding position, so as to drop dirt on the air inlet side surface of the filter device.

3. The automatic filter dirt collection system for an air purification device according to claim 1, characterized in that: Also includes: A cleaning brush is arranged on the air inlet side surface of the filter device so as to move up and down, and is configured to move up and down in a controlled manner when the flexible shielding sheet is in the second shielding position, so as to drop dirt on the air inlet side surface of the filter device.

4. The automatic filter dirt collection system for an air purification device according to claim 1, characterized in that: Also includes: A compression block is arranged in the dust box so as to move forward and backward, and is configured to move backward in a controlled manner when the flexible shielding sheet is in the first shielding position, so as to squeeze the dirt in the dust box.

5. The automatic filter dirt collection system for an air purification device according to claim 4, characterized in that: The dust collection box includes: a bottom wall, the bottom wall being arranged horizontally; a front wall connected to the front end of the bottom wall; the front wall is located on the lower side of the filter device and is sealed to the lower surface of the filter device; a rear wall connected to a rear end of the bottom wall; a cover plate, wherein the rear end of the cover plate is connected to the upper end of the rear wall, and the front side of the cover plate is the opening; Two side walls are arranged on both sides of the bottom wall, and each of the side walls connects the bottom wall, the front wall, the rear wall and the cover plate.

6. The automatic filter dirt collection system for an air purification device according to claim 4, characterized in that: The dust collection box includes: a bottom wall, the bottom wall being arranged horizontally; a front wall connected to the front end of the bottom wall; the front wall is located on the lower side of the filter device and is sealed to the lower surface of the filter device; a rear wall connected to a rear end of the bottom wall; Two side walls are provided on both sides of the bottom wall, and each of the side walls is connected to the bottom wall, the front wall, and the rear wall; The automatic filter dirt collection system further includes: a dustproof plate, the dustproof plate being movably disposed on the compression block, with the rear end of the dustproof plate being located at the rear side of the compression block; the dustproof plate being configured to contact the rear wall and the two side walls to define a compression space in common with the compression block; A spring is provided between the dustproof plate and the compression block to urge the rear end of the dustproof plate to be located at the rear side of the compression block.

7. The automatic filter dirt collection system for an air purification device according to claim 4, characterized in that: Also includes: a first driving device, the first driving device being configured to cause the third winding shaft to rotate in a first direction, the first driving device being a motor; a torsion spring disposed on the first winding shaft to cause the first winding shaft to rotate, thereby causing the third winding shaft to rotate in a second direction, the first direction being opposite to the second direction; A second driving device is configured to cause the compression block to move forward and backward; the second driving device is a linear motor.

8. The automatic filter dirt collection system for an air purification device according to claim 4, characterized in that: The bottom wall of the dust box includes a first bottom plate and a second bottom plate, the first bottom plate is arranged in front of the second bottom plate, and the second bottom plate is configured to block the gap between the first bottom plate and the rear wall of the dust box; An arc-shaped rod is provided on the lower side of the front end of the second bottom plate, the front end of the arc-shaped rod is located on the front side of the second bottom plate, and the front end of the arc-shaped rod is rotatably mounted on the first bottom plate; A dirt discharge port is provided on the lower side of the shell at a position corresponding to the dust collecting box.

9. The automatic filter dirt collection system for an air purification device according to claim 4, characterized in that: The first winding shaft is arranged at the lower side of the filter device; and the compression block can be moved to a position at the lower side of the filter device.

10. A collection method for the automatic collection system of filter dirt for an air purification device according to any one of claims 1 to 9, characterized in that: include: Obtaining the degree of dirt and blockage on the air inlet side surface of the filter device; When the dirt blockage degree is greater than a first preset degree value, the first winding shaft and the third winding shaft are controlled to rotate so that the flexible shielding sheet of the shielding device moves from the first shielding position to the second shielding position.

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