A mobile air purifier

CN224837746UActive Publication Date: 2026-10-09GUANGDONG FLEXURE INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202522413349.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-13
Publication Date
2026-10-09
Estimated Expiration
2035-11-13

AI Technical Summary

Technical Problem

[0003]其中,吸尘器和空气净化器一般都需要插电使用,用于插电的电线的长度有限,无法移动至远离插座的位置,尤其是空气净化器不具备便捷移动的条件,导致空气净化器在使用过程中无法自由移动到所需的地方使用

Benefits of technology

以上结构的移动式空气净化器利用蓄电池给风机供电,无需插电使用,电器主体的底部设有滚轮组件,用户抓住拉杆组件来推动电器主体即可省力地将空气净化器自由移动以转移至任意场景使用,位于地面上的毛发和附近的空气能够被进气通道吸入,从而实现毛发清理和空气净化的功能。

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a mobile air purifier, include: electric appliance main part, electric appliance main part is equipped with fan, filter core and battery, battery with fan links to as fan power supply, the bottom of electric appliance main part is equipped with gyro wheel subassembly, the upper portion detachable connection or of electric appliance main part can be folded and has pull rod subassembly, the bottom surface of electric appliance main part is equipped with the air inlet channel of input end downward, fan drives external fluid from air inlet channel enters after passing filter core. The mobile air purifier of above structure utilizes battery to power supply fan, need not to plug in and use, the bottom of electric appliance main part is equipped with gyro wheel subassembly, and user holds pull rod subassembly to promote electric appliance main part can save strength to move air purifier freely to shift to any scene use, the hair on the ground and the air near can be inhaled by air inlet channel, thereby realize the function of hair cleaning and air purification.
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Description

Technical Field

[0001] This utility model relates to the field of household cleaning tools, and in particular to a portable air purifier. Background Technology

[0002] With the rapid development of modern living standards, people have increasingly higher requirements for the cleanliness and hygiene of indoor environments and the versatility of home appliances. For example, in daily life, human or pet dander and hair often accumulate on the floor, which people often remove with a vacuum cleaner. However, when a vacuum cleaner is working, it stirs up the surrounding airflow, creating dust and mixing bacteria, particulate matter, and other substances into the air. Therefore, some users also need to equip themselves with air purifiers to solve these problems.

[0003] Vacuum cleaners and air purifiers generally require a power cord to operate. The power cords used for plugging in are of limited length and cannot be moved to locations far from the socket. Air purifiers, in particular, lack convenient mobility, making it impossible to move them freely to the desired location during use. Utility Model Content In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a portable air purifier that integrates hair cleaning and air purification functions and can be freely moved to any scene for use.

[0004] A portable air purifier according to an embodiment of the present invention includes: an electrical body, wherein the electrical body is provided with a fan, a filter element and a battery, the battery being connected to the fan to supply power to the fan, a roller assembly being provided at the bottom of the electrical body, a pull rod assembly being detachably connected to or foldable at the top of the electrical body, and an air intake channel with the input end facing downwards being provided on the bottom surface of the electrical body, wherein the fan drives external fluid to enter through the air intake channel and pass through the filter element.

[0005] A portable air purifier according to an embodiment of the present invention has at least the following beneficial effects: The portable air purifier with the above structure uses a battery to power the fan, so it does not need to be plugged in. The bottom of the main body of the appliance is equipped with a roller assembly. Users can easily move the air purifier to any scene by grabbing the pull rod assembly and pushing the main body of the appliance. Hair on the ground and the surrounding air can be drawn in by the air intake channel, thereby achieving the functions of hair cleaning and air purification.

[0006] In some embodiments of this utility model, the top wall of the electrical body is recessed downward to provide a battery compartment that cooperates with the storage battery. The battery compartment is provided with a first power terminal, and the storage battery has a second power terminal that cooperates with the first power terminal. When the storage battery is inserted into the battery compartment, the first power terminal and the second power terminal are kept in contact under the action of gravity.

[0007] In some embodiments of this utility model, the internal space of the battery compartment matches the outline shape of the battery, and when the battery is inserted into the battery compartment, the upper surface of the battery is flush with the top wall of the electrical body, and a pressing and ejecting mechanism is provided between the battery compartment and the battery.

[0008] In some embodiments of this utility model, the push-to-pop mechanism includes a mounting base fixedly disposed at the bottom of the battery compartment. The mounting base has a telescopic channel with an upward opening and extending upward. A pressing member is slidably disposed within the telescopic channel. The pressing member is connected to an elastic member that drives it to extend upward and abut against the bottom surface of the battery. A locking member is movably disposed on the mounting base. The pressing member has a locking groove that cooperates with the locking member. The pressing member is configured such that when pressed once, it can drive the locking member into the locking groove, and when pressed again, it can drive the locking member out of the locking groove.

[0009] In some embodiments of this utility model, the locking member is a swing arm rotatably mounted on the mounting base at one end, the end of the swing arm is provided with a hook, the pressing member is provided with an annular guide groove for the hook to rotate, the locking groove is a V-shaped groove located on the annular guide groove, and the annular guide groove is provided with a separating guide member that drives the swing arm to swing in a preset direction.

[0010] In some embodiments of this utility model, the pull rod assembly includes a first rod segment detachably mounted on the rear side wall of the upper part of the electrical appliance body and a second rod segment detachably connected to the end of the first rod segment, wherein the second rod segment is a telescopic rod.

[0011] In some embodiments of this utility model, the upper rear sidewall of the electrical appliance body is provided with a waist-shaped insertion hole, one end of the first rod segment is provided with a plug that is tightly inserted into the waist-shaped insertion hole, the other end of the first rod segment is inclined away from the electrical appliance body relative to the plug, and the second rod segment is tightly inserted into the end of the first rod segment away from the electrical appliance body.

[0012] In some embodiments of this utility model, the top wall of the electrical appliance body is provided with an exhaust port, the battery compartment is formed on the edge of the top wall of the electrical appliance body and located on one side of the exhaust port, the fan is a centrifugal fan with the exhaust side facing upward, and the air inlet side of the fan is horizontally arranged and facing the filter element.

[0013] In some embodiments of this utility model, a filter box is provided at the lower part of the electrical body, the air inlet channel is provided in the filter box, the filter box is provided with a collection chamber connected to the air inlet channel, the filter box is provided with a plurality of vent holes connected to the collection chamber, and the fan drives the external fluid to pass through the air inlet channel, the collection chamber and the vent holes in sequence and then through the filter element, so that the hair in the external fluid stays in the collection chamber.

[0014] In some embodiments of this utility model, the filter box is provided with two upwardly extending air intake wall panels at intervals, the air intake channel is defined between the two air intake wall panels, and a collection cavity is defined between the two air intake wall panels and the inner wall of the filter box. The two collection cavities are arranged opposite to each other on both sides of the air intake channel. The upper end of the two air intake wall panels is provided with an arc-shaped flow guide section, and the two arc-shaped flow guide sections respectively guide two streams of fluid to generate swirling motions in different clockwise directions. A front panel is detachably installed on the front side of the electrical body. The filter box has an inner surface facing the front panel and a downward opening. The filter box is detachably connected to the inner surface of the front panel to define the air intake channel and the collection cavity.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the portable air purifier of this utility model; Figure 2 yes Figure 1 Schematic diagram of the structural breakdown of the embodiment; Figure 3 yes Figure 1 A partial cross-sectional schematic diagram of the battery compartment and battery in the embodiment; Figure 4 This is a schematic diagram of one embodiment of the press-to-pop mechanism; Figure 5 This is a structural schematic diagram of one embodiment of the filter cartridge.

[0018] Figure label: Electrical body 100; battery compartment 110; first power terminal 120; waist-shaped socket 130; exhaust port 140; front panel 150; fan 200; filter element 300; storage battery 400; second power terminal 410; roller assembly 500; pull rod assembly 600; first rod section 610; insert block 611; second rod section 620; press-out mechanism 700; mounting base 710; telescopic channel 720; press part 730; elastic part 740; locking part 750; hook 751; locking groove 760; annular guide groove 770; partition guide part 780; filter box 800; collection chamber 810; vent 820; air inlet wall panel 830; arc-shaped drainage section 840. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] See Figure 1 and Figure 2 This utility model discloses a portable air purifier, comprising: an electrical body 100, wherein the electrical body 100 is provided with a fan 200, a filter element 300 and a battery 400, the battery 400 being connected to the fan 200 to supply power to the fan 200, a roller assembly 500 being provided at the bottom of the electrical body 100, a pull rod assembly 600 being detachably connected to or foldable at the upper part of the electrical body 100, and an air intake channel with the input end facing downwards being provided on the bottom surface of the electrical body 100, wherein the fan 200 drives external fluid to enter through the air intake channel and pass through the filter element 300.

[0024] The portable air purifier with the above structure uses a storage battery 400 to power the fan 200, so it does not need to be plugged in. The bottom of the main body 100 is equipped with a roller assembly 500. Users can easily move the air purifier to any scene by grabbing the pull rod assembly 600 and pushing the main body 100. Hair on the ground and the surrounding air can be sucked in through the air intake channel, thereby achieving the functions of hair cleaning and air purification.

[0025] See Figures 1 to 3 In some embodiments of this utility model, the top wall of the electrical appliance body 100 is recessed downward to form a battery compartment 110 that cooperates with the battery 400. The battery compartment 110 has a first power terminal 120 inside, and the battery 400 has a second power terminal 410 that cooperates with the first power terminal 120. When the battery 400 is inserted into the battery compartment 110, gravity keeps the first power terminal 120 and the second power terminal 410 in contact. It is understood that the cooperation between the second power terminal 410 and the first power terminal 120 enables a detachable conductive connection between the battery 400 and the electrical appliance body 100. When the battery 400 is depleted, it can be simply pulled out upwards, and the air purifier can be used again by replacing it with a new battery or recharging and reinstalling it.

[0026] See Figure 2 and Figure 3In some embodiments of this utility model, to prevent the second power terminal 410 and the first power terminal 120 from separating due to horizontal movement of the battery 400 relative to the battery compartment 110, the internal space of the battery compartment 110 matches the outline shape of the battery 400. To avoid the battery 400 protruding from the electrical body 100 and causing unsightly and uncomfortable handling, when the battery 400 is inserted into the battery compartment 110, the upper surface of the battery 400 is flush with the top wall of the electrical body 100. A pressing and ejecting mechanism 700 is provided between the battery compartment 110 and the battery 400. When the user applies downward pressure to the battery 400, the pressing and ejecting mechanism 700 can pop the battery 400 upward so that the battery 400 extends out of the battery compartment 110.

[0027] See Figure 4 In some embodiments of this utility model, the press-to-pop mechanism 700 includes a mounting base 710 fixedly disposed at the bottom of the battery compartment 110. The mounting base 710 is provided with a telescopic channel 720 that opens upward and extends upward. A pressing member 730 is slidably disposed in the telescopic channel 720. The pressing member 730 is connected to an elastic member 740 that drives it to extend upward to abut against the bottom surface of the battery 400. A locking member 750 is movably disposed on the mounting base 710. The pressing member 730 is provided with a locking groove 760 that cooperates with the locking member 750. The pressing member 730 is configured to drive the locking member 750 into the locking groove 760 when pressed once and to drive the locking member 750 out of the locking groove 760 when pressed again. Understandably, when the battery 400 is first installed in the battery compartment 110, the battery 400 enters the battery compartment 110 and presses downward against the pressing member 730. The battery 400 drives the pressing member 730 to move downward to overcome the action of the elastic member 740 until the locking member 750 engages with the locking groove 760. At this time, the upper surface of the battery 400 is flush with the top wall of the electrical body 100. When the battery 400 is pressed down further to drive the pressing member 730 to move downward a certain distance, the locking member 750 separates from the locking groove 760. The pressing member 730 moves upward under the action of the elastic member 740, thereby causing part of the battery 400 to protrude from the top wall of the electrical body 100, and the user can then remove the battery 400.

[0028] See Figure 4In some embodiments of this utility model, the locking member 750 is a swing arm rotatably mounted on the mounting base 710 at one end, the end of the swing arm is provided with a hook 751, the pressing member 730 is provided with an annular guide groove 770 for the hook 751 to rotate, the locking groove 760 is a V-shaped groove located on the annular guide groove 770, and the annular guide groove 770 is provided with a separating guide member 780 for driving the swing arm to swing in a preset direction. Specifically, when the battery 400 is inserted into the battery compartment 110, the battery 400 presses downward against the pressing member 730. The hook 751 contacts the separating guide member 780, causing the swing arm to swing. The hook 751 rotates clockwise or counterclockwise along the annular guide groove 770. During this process, when the hook 751 passes the position of the V-shaped groove, the hook 751 is engaged in the V-shaped groove under the action of the elastic member 740, thereby stabilizing the height position of the pressing member 730. At this time, the upper surface of the battery 400 is flush with the top wall of the electrical body 100. When it is necessary to remove the battery 400, the battery 400 is pressed down to move the pressing member 730 downward a certain distance. After the hook 751 leaves the V-shaped groove, it continues to rotate along the annular guide groove 770, thus returning to its original position, and the battery 400 is lifted to a certain height.

[0029] See Figure 2 In some embodiments of this utility model, the pull rod assembly 600 includes a first rod segment 610 detachably mounted on the rear side wall of the upper part of the electrical appliance body 100 and a second rod segment 620 detachably connected to the end of the first rod segment 610, wherein the second rod segment 620 is a telescopic rod. The pull rod assembly 600 with the above structure can adapt to users of different heights, and the pull rod assembly 600 can be removed from the electrical appliance body 100, facilitating the storage and transportation of the portable air purifier.

[0030] See Figure 2 In some embodiments of this utility model, the upper rear sidewall of the electrical appliance body 100 is provided with a waist-shaped insertion hole 130. One end of the first rod segment 610 is provided with a plug block 611 that is tightly fitted into the waist-shaped insertion hole 130. The other end of the first rod segment 610 is inclined away from the electrical appliance body 100 relative to the plug block 611. The second rod segment 620 is tightly fitted into the end of the first rod segment 610 away from the electrical appliance body 100. The overall upward inclined arrangement of the pull rod assembly 600 relative to the electrical appliance body 100 conforms to ergonomics and improves the comfort of the user in dragging the electrical appliance body 100. The use of a tight fit after insertion to assemble the pull rod assembly 600 improves the assembly and disassembly efficiency of the pull rod assembly 600 and reduces unnecessary fasteners.

[0031] See Figure 1 and Figure 2In some embodiments of this utility model, the top wall of the electrical appliance body 100 is provided with an exhaust port 140, the battery compartment 110 is formed on the edge of the top wall of the electrical appliance body 100 and located on one side of the exhaust port 140, the fan 200 is a centrifugal fan 200 with the exhaust side facing upward, and the air intake side of the fan 200 is horizontally arranged and facing the filter element 300. The above layout of the portable air purifier is conducive to making full use of the area of ​​the top wall of the electrical appliance body 100, maximizing the exhaust port 140 to improve filtration efficiency, and the position of the battery compartment 110 facilitates the user to install and remove the battery 400, and does not occupy the space of the air duct.

[0032] See Figure 2 and Figure 5 In some embodiments of this utility model, the lower part of the electrical body 100 is provided with a filter box 800, the air inlet channel is provided in the filter box 800, the interior of the filter box 800 is provided with a collection chamber 810 connected to the air inlet channel, and the filter box 800 is provided with a plurality of vent holes 820 connected to the collection chamber 810. The fan 200 drives the external fluid to pass through the air inlet channel, the collection chamber 810 and the vent holes 820 in sequence and then through the filter element 300, so that the hair in the external fluid stays in the collection chamber 810. The above-mentioned portable air purifier has a filter box 800 at the front end of the fluid travel direction. Under the suction of the fan 200, hair on the ground is drawn into the air intake channel along with the surrounding air. Then, the gas in the fluid entering the filter box 800 can reach the filter element 300 through the vent 820. The hair is collected in the collection chamber 810, thereby avoiding the problem of hair adhering to the surface of the filter element 300 and causing difficulty in cleaning. This can reduce the impact of wind resistance on the filtration effect and extend the service life of the filter element 300.

[0033] See Figure 5In some embodiments of this utility model, the filter box 800 is provided with two upwardly extending air intake wall panels 830 at intervals inside, defining the air intake channel between the two air intake wall panels 830. Each of the two air intake wall panels 830 and the inner wall of the filter box 800 defines a collection cavity 810. The two collection cavities 810 are arranged opposite to each other on both sides of the air intake channel. The upper ends of the two air intake wall panels 830 are provided with arc-shaped flow guide sections 840, which respectively guide two streams of fluid to generate swirling motions in different clockwise directions. The front panel 150 is detachably installed on the front side of the electrical body 100. The filter box 800 has an inner surface facing the front panel 150 and a downward opening. The filter box 800 is detachably connected to the inner surface of the front panel 150 to define the air intake channel and the collection cavity 810. Understandably, when the fan 200 is working, it creates negative pressure in the two collection chambers 810 on both sides of the air intake channel. External fluid enters from the lower end of the air intake channel and flows upwards to the upper end. Then, under the guidance of the two arc-shaped guide sections 840, it splits into two airflows that flow to the two collection chambers 810 respectively, creating an effect where one airflow rotates clockwise and the other counterclockwise. This facilitates the collection of more hair into the lower middle part of the collection chambers 810. When it is necessary to clean the hair in the filter box 800, simply remove the front panel 150 from the main body 100, and then remove the filter box 800 from the front panel 150 to empty the hair. Cleaning is very convenient.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A portable air purifier, characterized in that, include: An electrical body (100) is provided with a fan (200), a filter element (300) and a battery (400). The battery (400) is connected to the fan (200) to supply power to the fan (200). A roller assembly (500) is provided at the bottom of the electrical body (100). A pull rod assembly (600) is detachably connected to or foldable at the top of the electrical body (100). An air intake channel with the input end facing downward is provided on the bottom surface of the electrical body (100). The fan (200) drives external fluid to enter through the air intake channel and pass through the filter element (300).

2. A portable air purifier according to claim 1, characterized in that: The top wall of the electrical body (100) is recessed downward to provide a battery compartment (110) that cooperates with the storage battery (400). The battery compartment (110) is provided with a first power terminal (120) inside. The storage battery (400) has a second power terminal (410) that cooperates with the first power terminal (120). When the storage battery (400) is inserted into the battery compartment (110), the first power terminal (120) and the second power terminal (410) are kept in contact under the action of gravity.

3. A portable air purifier according to claim 2, characterized in that: The internal space of the battery compartment (110) matches the outline shape of the battery (400). When the battery (400) is inserted into the battery compartment (110), the upper surface of the battery (400) is flush with the top wall of the electrical body (100). A pressing and ejecting mechanism (700) is provided between the battery compartment (110) and the battery (400).

4. A portable air purifier according to claim 3, characterized in that: The press-and-pop mechanism (700) includes a mounting base (710) fixedly disposed at the bottom of the battery compartment (110). The mounting base (710) has an upward-opening and upward-extending telescopic channel (720). A pressing member (730) is slidably disposed in the telescopic channel (720). The pressing member (730) is connected to an elastic member (740) that drives it to extend upward to abut against the bottom surface of the battery (400). A locking member (750) is movably disposed on the mounting base (710). The pressing member (730) has a locking groove (760) that cooperates with the locking member (750). The pressing member (730) is configured to drive the locking member (750) into the locking groove (760) when pressed once and to drive the locking member (750) out of the locking groove (760) when pressed again.

5. A portable air purifier according to claim 4, characterized in that: The locking member (750) is a swing arm rotatably mounted on the mounting base (710) at one end. The end of the swing arm is provided with a hook (751). The pressing member (730) is provided with an annular guide groove (770) that allows the hook (751) to rotate. The locking groove (760) is a V-shaped groove located on the annular guide groove (770). The annular guide groove (770) is provided with a separating guide member (780) that drives the swing arm to swing in a preset direction.

6. A portable air purifier according to claim 1, characterized in that: The pull rod assembly (600) includes a first rod segment (610) detachably mounted on the rear side wall of the upper part of the electrical body (100) and a second rod segment (620) detachably connected to the end of the first rod segment (610), wherein the second rod segment (620) is a telescopic rod.

7. A portable air purifier according to claim 6, characterized in that: The upper rear side wall of the electrical appliance body (100) is provided with a waist-shaped insertion hole (130). One end of the first rod segment (610) is provided with a plug (611) that is tightly inserted into the waist-shaped insertion hole (130). The other end of the first rod segment (610) is inclined away from the electrical appliance body (100) relative to the plug (611). The second rod segment (620) is tightly inserted into the end of the first rod segment (610) away from the electrical appliance body (100).

8. A portable air purifier according to claim 2, characterized in that: The top wall of the electrical appliance body (100) is provided with an exhaust port (140). The battery compartment (110) is formed on the edge of the top wall of the electrical appliance body (100) and is located on one side of the exhaust port (140). The fan (200) is a centrifugal fan (200) with the exhaust side facing upward. The air intake side of the fan (200) is horizontally arranged and faces the filter element (300).

9. A portable air purifier according to claim 1, characterized in that: The lower part of the electrical body (100) is provided with a filter box (800), the air inlet channel is provided in the filter box (800), the inside of the filter box (800) is provided with a collection chamber (810) connected to the air inlet channel, and the filter box (800) is provided with a plurality of vent holes (820) connected to the collection chamber (810). The fan (200) drives the external fluid to pass through the air inlet channel, the collection chamber (810) and the vent holes (820) in sequence and then through the filter element (300) so that the hair in the external fluid stays in the collection chamber (810).

10. A portable air purifier according to claim 9, characterized in that: The filter box (800) is internally provided with two upwardly extending air intake wall panels (830), which define the air intake channel between the two air intake wall panels (830). Each of the two air intake wall panels (830) and the inner wall of the filter box (800) defines a collection chamber (810). The two collection chambers (810) are located opposite each other on both sides of the air intake channel. Each of the two air intake wall panels (830) has an arc-shaped flow guide section (840) at its upper end. The two arc-shaped flow guide sections (840) respectively guide two streams of fluid to generate swirling motions in different clockwise directions. The front panel (150) is detachably installed on the front side of the electrical body (100). The filter box (800) has an inner surface facing the front panel (150) and a downward opening. The filter box (800) is detachably connected to the inner surface of the front panel (150) to define the air intake channel and the collection chamber (810).