Air purification equipment

Abstract

The utility model discloses air purification equipment, which comprises a filter element, a filter element, an air inlet and an air outlet, and is characterized in that the filter element is at least used for filtering air; the flow guide shell is located on the periphery of the filtering piece, the flow guide shell and the filtering piece are arranged in a spaced mode, an air inlet flow channel is formed in the flow guide shell, and an air inlet is formed in the inner wall, facing the filtering piece, of the flow guide shell; the partial drainage direction of the air inlet, the tangent plane where the contact point of the surface of the filtering piece and the partial drainage direction is located, and the angle between the partial drainage direction and the tangent plane are not equal to 90 degrees.

Description

Technical Field

[0001] This utility model relates to the field of smart home technology, and in particular to an air purification device. Background Technology

[0002] As living standards improve, the cleanliness of home environments is receiving increasing attention. Air purification, home textile cleaning, and floor cleaning all rely on airflow carrying debris through filters, which then block the debris, thus achieving purification.

[0003] The cleanliness of the filter directly affects purification performance. The way air passes through the filter causes impurities to accumulate quickly and concentratedly on it, resulting in poor purification performance. Utility Model Content

[0004] In view of this, in order to solve at least one of the aforementioned technical problems, this utility model provides an air purification device.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] On the one hand, this utility model provides an air purification device, including:

[0007] Filter elements, which are used at least for filtering air;

[0008] The air guide shell is located on the outer periphery of the filter element and is spaced apart from the filter element. An air inlet is provided on the air guide shell.

[0009] The air inlet has a partial airflow direction, and the surface of the filter element is in contact with the partial airflow direction. The angle between the partial airflow direction and the tangent is not equal to 90 degrees.

[0010] The air inlet section is partially tangent to the side wall of the filter element.

[0011] The space between the flow guide shell and the filter element is uniform in the circumferential direction of the filter element.

[0012] And / or, there are multiple air inlets, which are evenly distributed around the circumference of the air guide shell.

[0013] The number of air inlets is multiple, with at least two air inlets arranged along the axial direction of the guide shell;

[0014] The filter element includes a first end and a second end in the axial direction. The direction from the first end to the second end of the filter element is a preset dust discharge direction. Among the two air inlets arranged in the axial direction of the guide shell, the opening area of ​​the air inlet closer to the first end of the filter element is larger than the opening area of ​​the air inlet closer to the second end of the filter element.

[0015] The air intake direction of the air inlet is perpendicular to the axis of the guide shell.

[0016] Alternatively, the filter element includes a first end and a second end in the axial direction, the direction from the first end to the second end of the filter element is a preset dust discharge direction, the air inlet direction is at an angle of less than 90 degrees with the axis of the guide shell, and is inclined towards the second end of the filter element.

[0017] The filter element includes a first end and a second end in the axial direction, and the direction from the first end to the second end of the filter element is a preset dust discharge direction.

[0018] The distance between the air inlet and the first end of the filter element along the axial direction of the filter element is less than the distance between the air inlet and the second end of the filter element along the axial direction of the filter element.

[0019] The air guide shell includes a shell and an air guide plate. The air guide plate is connected to the shell, and the air guide plate and the shell form an air inlet.

[0020] The air guide plate includes at least an outer guide plate, which is tangent to the inner wall of the air guide shell.

[0021] The air purification equipment also includes:

[0022] A baffle plate is fitted inside the filter element, and the projections of the air inlet and the baffle plate in the radial direction of the filter element overlap.

[0023] The air purification equipment also includes:

[0024] The dust box includes a dust collection chamber and a top opening communicating with the dust collection chamber. The top opening communicates at least with the space between the flow guide shell and the filter element. The dust box is at least used to receive debris falling from the filter element and / or the flow guide shell.

[0025] The dust box and the air guide shell are detachably connected.

[0026] The air purification equipment also includes:

[0027] Dust ring;

[0028] The filter element includes a first end and a second end in the axial direction, and the direction from the first end to the second end of the filter element is a preset dust discharge direction;

[0029] The dust-proof ring is connected to the second end of the filter element;

[0030] The dust-proof ring extends towards the first end of the flow guide shell and away from the filter element, and the dust-proof ring and the flow guide shell are spaced apart;

[0031] The distance between the dust baffle ring and the air guide shell is greater than or equal to 5 mm.

[0032] On the other hand, this application also provides an air purification device, comprising:

[0033] Filter elements, which are used at least for filtering air;

[0034] The air guide shell is located on the outer periphery of the filter element and is spaced apart from the filter element. An air inlet is provided on the air guide shell.

[0035] The air intake shell includes a central axis, and the air intake direction of the air inlet is at least partially offset from the central axis.

[0036] Furthermore, this application also provides an air purification device, comprising:

[0037] Filter elements, which are used at least for filtering air;

[0038] The air guide shell is located on the outer periphery of the filter element and is spaced apart from the filter element. An air inlet is provided on the air guide shell.

[0039] The air inlet is used to guide the airflow at an angle to impact the surface of the filter element to clean the surface.

[0040] The air purification device proposed in this utility model allows airflow to enter between the guide shell and the filter element through the air inlet on the guide shell, and then pass through the filter element. The filter element filters out impurities in the air, which are then trapped on its surface, thus achieving air purification. The airflow direction is inclined at an angle to the tangential surface of the contact point on the filter element, causing the airflow to move circumferentially after passing through the air inlet, rather than flowing vertically into the filter element radially. This creates a cyclone diffusion of airflow in the space between the guide shell and the filter element. Impurities, under the action of centrifugal force, impact the inner wall of the guide shell, allowing them to remain on the guide shell and fall off, thereby purifying the air and reducing impurity accumulation on the filter element. Furthermore, the cyclone diffusion of airflow increases the air intake area into the filter element, improving localized dust accumulation. The airflow also pushes away impurities trapped on the surface of the filter element, achieving surface cleaning. Attached Figure Description

[0041] Figure 1 This diagram schematically illustrates the structure of an air purification device.

[0042] Figure 2 The diagram schematically illustrates a cross-sectional view of an air purification device from a first-view perspective.

[0043] Figure 3 The diagram schematically illustrates a cross-sectional view of an air purification device from a second perspective.

[0044] Figure 4 The diagram schematically illustrates a cross-sectional view of an air purification device from a third-person perspective. Detailed Implementation

[0045] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description of the specific implementation method, structure, features and effects of an air purification device proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0046] On the one hand, such as Figure 1-4 As shown, this embodiment of the utility model provides an air purification device, including:

[0047] Filter element 100, filter element 100 is used for filtering at least air;

[0048] The air guide shell 200 is located on the outer periphery of the filter element 100 and is spaced apart from the filter element 100. An air inlet 201 is provided on the air guide shell 200.

[0049] The air inlet 201 has a partial airflow direction a, and the filter element 100 has a contact point E with the partial airflow direction a on the tangent plane b. The angle between the partial airflow direction a and the tangent plane b is not equal to 90 degrees.

[0050] Air purification equipment removes impurities carried in the airflow by pushing airflow through filter 100. The air purification equipment also includes an exhaust power unit 700 and a deflector. The exhaust power unit 700 includes a motor and a fan connected to the motor. The motor drives the fan to rotate, which in turn draws airflow from inside the filter 100, driving outside air to enter through the air inlet 201, pass through the filter 100, and then be rectified by the deflector before being discharged as purified air.

[0051] The guide shell 200 has a cylindrical structure. The filter element 100 can be of various shapes, such as cylindrical, square, or irregularly shaped. The guide shell 200 surrounds the filter element 100, and the gap between the guide shell 200 and the filter element 100 forms a central flow channel 203 around the filter element 100. The air inlet 201 can be a channel with a certain extension, thereby guiding the airflow. The airflow direction of the air inlet 201 refers to the instantaneous direction of the airflow from the air inlet 201 to the central flow channel 203; the airflow direction of the air inlet 201 can also be called the air inlet direction. Because the air inlet 201 has a certain opening area, the airflow flowing into the intermediate flow channel 203 has a certain propagation area. This means that the entire airflow direction of the air inlet 201 can contact the filter element 100, or only a portion of the airflow direction can contact the filter element 100, while the other portion will pass through the intermediate flow channel 203 and intersect with the inner wall of the guide shell 200, without intersecting with the filter element 100. For example... Figure 4As shown, the airflow direction a of the air inlet 201 has a contact point E with the filter element 100. The filter element 100 has a cross-section b at the contact point E, and the angle between the airflow direction a and the cross-section b is not equal to 90 degrees. That is, the airflow has a circumferential flow velocity along the guide shell 200 and the filter element 100. The airflow will then move relative to the filter element 100 at an angle relative to the contact point E in a radial direction, rather than perpendicular to the cross-section b of the contact point E, and will be projected onto the filter element 100 in a radial direction relative to the contact point E. It can be understood that the filter element 100 is not limited to the cylindrical shape shown in the figure. If it is a square tube or other irregular shape, it will still have a cross-section corresponding to the contact point E. For example, if the filter element 100 is a square tube, the cross-section corresponding to the contact point E may coincide with the same side surface of the filter element 100. The opening size of the air inlet 201 can be set according to the number of air inlets 201 and a preset airflow rate.

[0052] After the airflow enters the intermediate flow channel 203 through the air inlet 201, it tends to continue propagating in the intermediate flow channel 203 along the direction of the air inlet 201. In the intermediate flow channel, the air pressure at the location of the air inlet 201 will be higher, while the air pressure will gradually decrease away from the air inlet 201. Due to the influence of the air pressure in the intermediate flow channel 203, the airflow will tend to diffuse towards at least one side in the axial direction of the filter element 100. Subsequently, in the intermediate flow channel 203, the airflow circumferentially surrounds the filter element 100 and diffuses axially around the filter element 100, thus forming a cyclone around the filter element 100 in the intermediate flow channel 203. Due to the centrifugal force, the airflow will move close to the inner wall of the guide shell 200. Centrifugal force also causes impurities carried by the airflow to be thrown outwards and impact the inner wall of the guide shell 200. These impurities are retained on the inner wall of the guide shell 200 and, under the combined effects of gravity and downward airflow diffusion, detach from the inner wall, reducing contact between impurities and the filter element 100 and minimizing impurity accumulation on it. Simultaneously, it allows air to be projected onto the filter element 100 over a larger area, increasing the air intake area and thus the filtration area, mitigating the problem of rapid localized dust accumulation on the filter element 100 caused by concentrated airflow.

[0053] The airflow also serves to remove dust from the filter element 100. After the airflow enters the intermediate flow channel 203, some of the airflow will impact the surface of the filter element 100 relative to the air inlet 201. Because the airflow is inclined relative to the filter element 100, when the airflow contacts the outer wall of the filter element 100, it will tend to move circumferentially relative to the surface of the filter element 100. This can be seen as the airflow tending to sweep across the surface of the filter element 100. Subsequently, the inclined airflow sweeping across the surface of the filter element 100 will push the accumulated debris on the surface of the filter element 100, promoting the removal of debris and cleaning the surface of the filter element 100. In the area below the filter element 100 relative to the air inlet 201, due to the centrifugal force, the airflow first spirals down close to the inner wall of the guide shell 200, and then spirals up close to the filter element 100. At the same time, it enters the filter element 100 through the side wall. The spiraling airflow is also inclined relative to the filter element 100, thus cleaning the surface of the filter element 100.

[0054] The filter element 100 can be a bottom-sealed structure, in which case most of the airflow will rise and swirl through the side walls of the filter element 100, while passing through the filter element 100 through the side walls. Alternatively, the bottom of the filter element 100 can be covered with a filter plate, in which case part of the airflow will pass through the side walls of the filter element 100, and another part of the airflow will pass through the filter plate at the bottom of the filter element 100 for filtration, thereby increasing the filtration area and increasing the airflow.

[0055] The air purification device proposed in this embodiment of the invention allows airflow to enter between the guide shell and the filter element through the air inlet on the guide shell, and then pass through the filter element. The filter element filters out impurities in the air, which are then trapped on its surface, thus achieving air purification. Because the airflow direction of the air inlet is inclined at an angle to the tangential surface of the contact point on the filter element, the airflow moves in a circumferentially inclined direction after passing through the air inlet, rather than flowing vertically into the filter element in a radial direction. This creates a cyclone diffusion of airflow in the space between the guide shell and the filter element. Impurities, under the action of centrifugal force, impact the inner wall of the guide shell, allowing them to remain on the guide shell and fall off, thereby purifying the air and reducing the accumulation of impurities on the filter element. Furthermore, the cyclone diffusion of airflow increases the air intake area into the filter element, improving localized dust accumulation. The airflow also pushes away impurities trapped on the surface of the filter element, achieving surface cleaning.

[0056] On the other hand, this application also provides an air purification device, comprising:

[0057] Filter element 100, filter element 100 is used for filtering at least air;

[0058] The air guide shell 200 is located on the outer periphery of the filter element 100 and is spaced apart from the filter element 100. An air inlet 201 is provided on the air guide shell 200.

[0059] The air intake housing 200 includes a central axis, and the air intake direction of the air inlet 201 is at least partially offset from the central axis.

[0060] The structural and positional relationship between the filter element 100 and the flow guide shell 200 can be referred to the aforementioned embodiments, and will not be repeated here. Figure 3 As shown, the air inlet 200 includes a central axis L. The air inlet direction of the air inlet 201 is at least partially offset from the central axis L. This means that the air inlet direction or the flow direction of the air inlet 201 does not intersect with the central axis L. In other words, the airflow flowing from the air inlet 201 into the intermediate flow channel 203 will not flow radially toward the central axis L, but will have a circumferential speed around the air inlet 200.

[0061] After the airflow enters the intermediate flow channel 203 through the air inlet 201, it tends to continue propagating in the intermediate flow channel 203 along the direction of the air inlet 201. In the intermediate flow channel, the air pressure at the location of the air inlet 201 will be higher, while the air pressure will gradually decrease away from the air inlet 201. Due to the influence of the air pressure in the intermediate flow channel 203, the airflow will tend to diffuse towards at least one side of the axial direction of the guide shell 200. Subsequently, in the intermediate flow channel 203, the airflow circumferentially surrounds the guide shell 200 and diffuses axially around the guide shell 200, thus forming a vortex around the guide shell 200 in the intermediate flow channel 203. Due to the centrifugal force, the airflow will move close to the inner wall of the guide shell 200. Centrifugal force also causes impurities carried by the airflow to be thrown outwards and impact the inner wall of the guide shell 200. These impurities are retained on the inner wall of the guide shell 200 and, under the combined effects of gravity and downward airflow diffusion, detach from the inner wall, reducing contact between impurities and the filter element 100 and minimizing impurity accumulation on it. Simultaneously, it allows air to be projected onto the filter element over a larger area, increasing the air intake area and thus the filtration area, mitigating the problem of rapid localized dust accumulation on the filter element 100 caused by concentrated airflow.

[0062] Furthermore, this application also provides an air purification device, comprising:

[0063] Filter element 100, filter element 100 is used for filtering at least air;

[0064] The air guide shell 200 is located on the outer periphery of the filter element 100 and is spaced apart from the filter element 100. An air inlet 201 is provided on the air guide shell 200.

[0065] The air inlet 201 is used to guide the airflow to impact the surface of the filter element 100 at an angle to clean the surface.

[0066] The structure and positional relationship between the filter element 100 and the guide shell 200 can be referred to in the aforementioned embodiments, and will not be repeated here. The air inlet 201 is used to guide the airflow to impact the surface of the filter element 100 at an angle. This means that the direction of the airflow entering the intermediate flow channel 203 through the air inlet 201 is inclined relative to the direction of the airflow at the impact point on the surface of the filter element 100. That is, the airflow is not perpendicular to the surface of the filter element 100, but tends to sweep across the surface of the filter element 100 at an angle. The oblique sweep of the airflow across the surface of the filter element 100 will push the accumulated debris on the surface of the filter element 100, promote the removal of debris, and achieve cleaning of the surface of the filter element 100.

[0067] This application also provides the following embodiments, and it is understood that the following embodiments are applicable to any of the aforementioned air purification devices.

[0068] In one embodiment, a portion of the airflow direction of the air inlet 201 is tangent to the sidewall of the filter element 100.

[0069] That is, the angle between the tangent plane corresponding to the contact point of the air inlet 201 and the partial airflow direction of the filter element 100 is 0 degrees. This allows part of the airflow to sweep across the sidewall of the filter element 100 in a direction approximately tangential to it, resulting in better pushing of debris from the outer wall of the filter element 100 and making it easier for the debris to detach. Furthermore, it significantly increases the speed of the airflow moving circumferentially around the filter element 100, enabling the formation of a cyclone over a larger area. This allows the debris carried by the airflow to be separated by impacting the inner wall of the guide shell 200 under centrifugal force, thus improving the problem of rapid localized dust accumulation on the filter element 100.

[0070] The structure of the flow guide shell 200 can be varied. In one embodiment, the flow guide shell 200 and the filter element 100 are spaced evenly around the circumference of the filter element 100. For example, the flow guide shell 200 is a cylindrical structure with an inner diameter larger than the outer diameter of the filter element 100, and is coaxially arranged with the filter element 100. This provides as uniform an airflow as possible around the circumference of the filter element 100, allowing the airflow to enter the filter element 100 evenly and reducing local dust accumulation. It also makes the airflow smoother, reducing airflow stagnation caused by abrupt changes in the cross-sectional area of ​​the flow channel or the angle of the inner wall of the flow guide shell 200, which would affect the airflow velocity.

[0071] The number of air inlets 201 can be only one, and the airflow can be increased by increasing the area of ​​the air inlet 201. Alternatively, there can be multiple air inlets 201, which are evenly distributed around the circumference of the filter element 100. By setting multiple circumferentially evenly distributed air inlets 201, the air velocity is increased on the one hand, and the air enters in a dispersed manner in the circumferential direction, improving the local dust accumulation of the filter element 100. Five, six, seven, or eight air inlets 201 can be evenly arranged in the circumferential direction.

[0072] Different air inlets 201 correspond to different contact points and cross-sections with the filter element 100, and the angle between different air inlets 201 and their corresponding cross-sections can be the same. Alternatively, it can be said that the angle between the airflow directions of any two adjacent air inlets 201 is the same, thus providing a relatively uniform cyclone on the outer periphery of the filter element 100. The angle between different air inlets 201 and their corresponding cross-sections can also be different. For example, only part of the airflow direction of some air inlets 201 may be tangent to the sidewall of the filter element 100, while the airflow direction of other air inlets 201 may not be tangent to the filter element 100, such as having an angle greater than 0 degrees with the cross-section.

[0073] In one embodiment, there are multiple air inlets 201, with at least two air inlets 201 arranged in the axial direction of the filter element 100.

[0074] There may be only two air inlets 201, arranged in the axial direction of the filter element 100. Alternatively, there may be more air inlets 201, divided into multiple groups, with each group of air inlets 201 evenly arranged circumferentially, and multiple groups of air inlets 201 arranged in the axial direction of the filter element 100. For example, there may be 14 air inlets 201, with 7 in each group, each group of air inlets 201 evenly distributed around the circumferential direction of the filter element 100, and two groups of air inlets 201 arranged in the axial direction of the filter element 100. This can achieve a larger air intake volume. In one embodiment, the filter element 100 includes a first end and a second end in the axial direction, the direction from the first end to the second end of the filter element 100 is a preset dust discharge direction, and among the two air inlets 201 arranged in the axial direction of the filter element 100, the opening area of ​​the air inlet 201 closer to the first end of the filter element 100 is larger than the opening area of ​​the air inlet 201 closer to the second end of the filter element 100.

[0075] Debris on the filter element 100 and the guide shell 200 will move towards the preset dust discharge direction under the action of airflow and gravity. A structure for collecting debris can be set at the rear end of the preset dust discharge direction, which will be illustrated later. The preset dust discharge direction refers to the direction in which debris on the filter element 100 is to fall off. For example, the preset dust discharge direction is vertically downward. The air inlet 201 near the first end of the filter element 100 is the upper air inlet 201, and the air inlet 201 near the second end of the filter element 100 is the lower air inlet 201. The opening area of ​​the upper air inlet 201 is larger than that of the lower air inlet 201, which results in a larger airflow and stronger air pressure at the upper air inlet 201. While increasing the airflow, the airflow at the upper air inlet 201 can be effectively diffused downward through the air pressure difference, improving airflow stagnation, thereby increasing the flow rate, improving cyclone intensity and diffusion efficiency.

[0076] In one embodiment, the air inlet 201 is perpendicular to the axial direction of the filter element 100, that is, the air inlet 201 is not inclined in the axial direction, but only in the radial direction. For example, if the axial direction of the filter element 100 is vertical, the air inlet 201 is horizontal.

[0077] In another embodiment, the filter element 100 includes a first end and a second end in the axial direction. The direction from the first end to the second end of the filter element 100 is a preset dust discharge direction. The air inlet 201 has an angle of less than 90 degrees with the axial direction of the filter element 100 and is inclined toward the second end of the filter element 100.

[0078] That is, the air inlet 201 is tilted towards the side where dust needs to be discharged, which helps the airflow entering the middle flow channel 203 to better form a cyclone that diffuses on the side of dust discharge, increases the area of ​​airflow entering the filter element 100, and helps to push the debris on the filter element 100 to fall off towards the preset dust discharge direction.

[0079] In one embodiment, the filter element 100 includes a first end and a second end in the axial direction. The direction from the first end to the second end of the filter element 100 is a preset dust discharge direction. The distance between the air inlet 201 and the first end of the filter element 100 in the axial direction is less than the distance between the air inlet 201 and the second end of the filter element 100 in the axial direction.

[0080] For example, the air inlet 201 can correspond to the first end of the filter element 100, or the air inlet 201 can extend to correspond to the first end of the filter element 100. The airflow from the air inlet 201 will diffuse towards the second end of the filter element 100 where the air pressure is lower, thereby forming a cyclone that moves around the filter element 100 circumferentially and toward the second end of the filter element 100. This allows air to enter the filter element 100 over a larger area, while also pushing the debris accumulated on the surface of the filter element 100 toward the second end of the filter element 100, causing the debris to fall off along the preset dust discharge direction, thus achieving debris collection.

[0081] The air guide shell 200 can be a cylindrical structure with a smooth outer circumference. The air inlet 201 can be an internal channel created by the wall thickness of the air guide shell 200. However, this design requires the air guide shell 200 to have sufficient wall thickness to ensure that the air inlet 201 has sufficient length to stabilize the air intake direction. To achieve lightweighting of the sidewalls of the air guide shell 200, an outwardly protruding structure can also be provided to support the air inlet 201.

[0082] In one embodiment, the airflow guide shell 200 includes a shell 210 and an airflow guide plate 220. The shell 210 is an approximately cylindrical structure. The airflow guide plate 220 is connected to the shell 210 and protrudes outward from the outer wall of the shell 210, forming an air inlet 201 with the shell 210. After the airflow direction is changed by the airflow guide plate 220, it flows out to the intermediate flow channel 203. The airflow direction of the air inlet 201 can be adjusted by adjusting the shape and angle of the airflow guide plate 220.

[0083] In one embodiment, the air guide plate 220 includes at least an outer guide plate 221, which is tangent to the inner wall of the housing 210. The air guide plate 220 also includes two side guide plates 222, which are connected to both sides of the outer guide plate 221 along the axial direction of the housing 210 to form a complete air inlet 201. The tangency of the outer guide plate 221 to the inner wall of the housing 210 serves two purposes: firstly, it ensures a smooth transition of the inner wall of the air guide shell 200, preventing the accumulation of debris at the air inlet 201; secondly, in embodiments where the air guide shell 200 and the filter element 100 are coaxially arranged, the air inlet direction is tangent to the filter element 100.

[0084] In one embodiment, the air purification device further includes a baffle plate 300, which is sleeved on the inner side of the filter element 100, and the air inlet 201 and the projection of the baffle plate 300 in the radial direction of the filter element 100 have an overlapping area.

[0085] Subsequently, the airflow cannot pass through the filter element 100 at the location corresponding to the baffle 300, failing to form a through channel. This reduces the amount of airflow entering the filter element 100 from the air inlet 201. Instead, the airflow diffuses axially along the filter element 100, entering the filter element 100 over a larger area different from the location of the baffle 300. This increases the area of ​​airflow entering the filter element 100, reducing the problem of rapid accumulation of debris at the air inlet 201 corresponding to the filter element 100. When the filter element 100 includes a first end and a second end along the axial direction, and the direction from the first end to the second end of the filter element 100 is a preset dust discharge direction, such as... Figure 2 As shown, the baffle 300 can extend to the first end of the filter element 100, but the bottom end of the baffle 300 opposite to the first end of the filter element 100 is higher than the bottom end of the air inlet 201. As a result, the projections of the baffle 300 and the air inlet 201 in the radial direction of the filter element 100 only partially overlap, thus improving the problem of reduced flow caused by excessive obstruction.

[0086] In one embodiment, the air purification device further includes a dust box 400, which includes a dust collection chamber 410 and a top opening communicating with the dust collection chamber 410. The top opening is in at least spatial communication with the space between the guide shell 200 and the filter element 100. The dust box 400 is at least used to receive debris falling from the filter element 100 and / or the guide shell 200.

[0087] The filter element 100 includes a first end and a second end in the axial direction. The direction from the first end to the second end of the filter element 100 is a preset dust discharge direction. The dust box 400 is located behind the filter element 100 in the preset dust discharge direction. Debris on the filter element 100 and / or the guide shell 200 can fall off naturally by gravity, or, as the airflow diffuses around the filter element 100 towards the dust box 400, the airflow will push the debris towards the dust box 400, and the airflow also suppresses the debris accumulated inside the dust box 400, making the dust box 400 less likely to be lifted in the opposite direction by the airflow. The top opening of the dust box 400 can be an annular opening, communicating only with the intermediate flow channel 203 between the guide shell 200 and the filter element 100. The top opening of the dust box 400 can also be a circular opening.

[0088] In one embodiment, the dust box 400 is detachably connected to the flow guide shell 200. The connection method between the dust box 400 and the flow guide shell 200 includes at least one of snap-fit, hook-fit, threaded connection, clamp connection, plug-in, magnetic attraction, and adhesive. The detachable dust box 400 can be cleaned separately. If the flow guide shell 200 includes a bottom opening, the dust box 400 is detachably connected to the edge of the bottom opening. After picking up the dust box 400, the filter element 100 can be removed, installed, or cleaned through the bottom opening.

[0089] In one embodiment, the air purification device further includes a dust-blocking ring 500. The filter element 100 includes a first end and a second end in an axial direction, and the direction from the first end to the second end of the filter element 100 is a preset dust discharge direction. The dust-blocking ring 500 is connected to the second end of the filter element 100. The dust-blocking ring 500 extends towards the guide shell 200 and away from the first end of the filter element 100, and is spaced apart from the guide shell 200.

[0090] After debris on the filter element 100 and / or the guide shell 200 is pushed into the dust box 400 by gravity or airflow, the debris accumulated in the dust box 400 is easily moved by airflow disturbance. The dust baffle ring 500 is tilted towards the preset dust discharge direction, allowing the debris to move along the dust baffle ring 500 into the dust box 400 in that direction. However, when the debris moves in the opposite direction of the preset dust discharge direction, it will be blocked by the dust baffle ring 500 and cannot move upwards, reducing the risk of debris in the dust box 400 re-attaching to the filter element 100 due to disturbance. The distance between the dust baffle ring 500 and the guide shell 200 is set according to the airflow intensity and the possible amount of debris. The distance between the dust baffle ring 500 and the guide shell 200 can be greater than or equal to 5 mm, such as 5 mm, 8 mm, etc.

[0091] In one embodiment, the air purification device further includes: a mounting bracket 600, with the filter element 100 and the mounting bracket 600 positioned at an upper limit in the axial direction, and the filter element 100 and the mounting bracket 600 being movably connected in the circumferential direction.

[0092] The filter element 100 can be removed from the mounting bracket 600 for cleaning, or it can be cleaned without removal by using a cleaning brush against the side wall of the filter element 100 and manually rotating the filter element 100, making cleaning more convenient.

[0093] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An air purification device, characterized in that, include: A filter element (100) for filtering at least air; A flow guide shell (200) is located on the outer periphery of the filter element (100) and is spaced apart from the filter element (100). An air inlet (201) is provided on the flow guide shell (200). The partial airflow direction of the air inlet (201), the tangent of the contact point between the surface of the filter element (100) and the partial airflow direction, and the angle between the partial airflow direction and the tangent are not equal to 90 degrees.

2. The air purification device according to claim 1, characterized in that, The air inlet (201) partially directs airflow in a direction that is tangent to the sidewall of the filter element (100).

3. The air purification device according to claim 1, characterized in that, The flow guide shell (200) and the filter element (100) are spaced evenly in the circumferential direction of the filter element (100); And / or, the number of air inlets (201) is multiple, and the multiple air inlets (201) are evenly distributed circumferentially on the guide shell (200).

4. The air purification device according to claim 1, characterized in that, The number of air inlets (201) is multiple, and at least two air inlets (201) are arranged in the axial direction of the guide shell (200); The filter element (100) includes a first end and a second end in the axial direction. The direction from the first end to the second end of the filter element (100) is a preset dust discharge direction. Among the two air inlets (201) arranged in the axial direction of the guide shell (200), the opening area of ​​the air inlet (201) near the first end of the filter element (100) is greater than the opening area of ​​the air inlet (201) near the second end of the filter element (100).

5. The air purification device according to claim 1, characterized in that, The air inlet (201) is perpendicular to the axis of the guide shell (200). Alternatively, the filter element (100) includes a first end and a second end in the axial direction, the direction from the first end of the filter element (100) to the second end of the filter element (100) is a preset dust discharge direction, the air inlet (201) has an angle of less than 90 degrees with the axis of the guide shell (200), and is inclined toward the second end of the filter element (100).

6. The air purification device according to claim 1, characterized in that, The filter element (100) includes a first end and a second end in the axial direction, and the direction from the first end to the second end of the filter element (100) is a preset dust discharge direction; The distance between the air inlet (201) and the first end of the filter element (100) in the axial direction of the filter element (100) is less than the distance between the air inlet (201) and the second end of the filter element (100) in the axial direction of the filter element (100).

7. The air purification device according to claim 1, characterized in that, The air guide shell (200) includes a shell (210) and an air guide plate (220), the air guide plate (220) is connected to the shell (210), and the air guide plate (220) and the shell (210) together form the air inlet (201); The air guide plate (220) includes at least an outer guide plate (221), which is tangent to the inner wall of the air guide shell (200).

8. The air purification device according to claim 1, characterized in that, The air purification equipment also includes: A baffle plate (300) is sleeved on the inner side of the filter element (100), and the air inlet (201) and the projection of the baffle plate (300) in the radial direction of the filter element (100) have an overlapping area.

9. The air purification device according to claim 1, characterized in that, The air purification equipment also includes: A dust box (400) includes a dust collection chamber (410) and a top opening communicating with the dust collection chamber (410), the top opening communicating at least with the space between the flow guide shell (200) and the filter element (100), the dust box (400) being used at least to receive debris falling from the filter element (100) and / or the flow guide shell (200); The dust box (400) and the flow guide shell (200) are detachably connected.

10. The air purification device according to claim 1, characterized in that, The air purification equipment also includes: Dust baffle ring (500); The filter element (100) includes a first end and a second end in the axial direction, and the direction from the first end to the second end of the filter element (100) is a preset dust discharge direction; The dust-blocking ring (500) is connected to the second end of the filter element (100); The dust-blocking ring (500) extends toward the first end of the flow guide shell (200) and away from the filter element (100), and the dust-blocking ring (500) and the flow guide shell (200) are spaced apart; The distance between the dust-blocking ring (500) and the flow guide shell (200) is greater than or equal to 5 mm.

11. An air purification device, characterized in that, include: A filter element (100) for filtering at least air; A flow guide shell (200) is located on the outer periphery of the filter element (100) and is spaced apart from the filter element (100). An air inlet (201) is provided on the flow guide shell (200). The air guide shell (200) includes a central axis, and the air inlet (201) has an air intake direction that is at least partially offset from the central axis.

12. An air purification device, characterized in that, include: A filter element (100) for filtering at least air; A flow guide shell (200) is located on the outer periphery of the filter element (100) and is spaced apart from the filter element (100). An air inlet (201) is provided on the flow guide shell (200). The air inlet (201) is used to guide the airflow to impact the surface of the filter (100) at an angle to clean the surface.

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