Fan and method of using same

Abstract

The present application provides a fan and a method of using the same. The fan comprises a base, a body comprising an air inlet, an air outlet, a horizontal motor for generating an air flow through the body, a rotating motor, and a filter, a nozzle connected to the air outlet of the body for receiving and ejecting the air flow from the body, and the rotating motor drives the body to rotate based on the base to change the direction of the air inlet and the air outlet. The present application can improve the position of sucking air, avoid the indoor ground air entering the fan, concentrate the wind power on high emission, and enhance the ability of overall air purification in the room by changing the direction of the air inlet.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning, in particular, to a fan and a method of using the same. BACKGROUND

[0002] Most of the existing bladeless fans are in a low suction and upward blowing mode. Air is sucked from the bottom by a vertical motor at the bottom of the bladeless fan, a vertical air flow is generated by the vertical motor, and the air flow is guided to the horizontal direction by the nozzle after being delivered to the nozzle above the vertical motor and then sprayed.

[0003] At present, there are many bladeless fans with air filters. Figure 1 A sectional view of the prior art bladeless fan is shown in FIG. 1. Figure 1 As shown in the figure, most of them have a ring-shaped nozzle 901, an outer shell 903, a base 904, a filter 905, a fan motor 906, and a mesh inner container 907. The outer shell 903 with air inlet mesh is arranged on the base 904, the filter 905 is arranged in the outer shell 903, the mesh inner container 907 is arranged in the filter 905, the first air inlet of the fan motor 906 is arranged in the mesh inner container 907, the ring-shaped nozzle 901 is arranged above the fan motor 906 in the direction of gravity, and the air outlet of the fan motor 906 is connected to the nozzle 901. The indoor air passes through the mesh of the outer shell 903 and the filter 905 in turn, and then enters the mesh inner container 907. The air inlet of the fan motor 906 sucks air in the anti-gravity direction and then continues to deliver the air to one end of the ring-shaped nozzle 901 in the anti-gravity direction (vertically upward), and then the air is dispersed to all parts of the ring-shaped nozzle 901 and sprayed out.

[0004] The following technical problems exist in this structure:

[0005] 1. The position of air suction is low, which easily sucks the dust on the ground or table into the fan, reduces the air quality, and shortens the service life of the air purifier in the fan.

[0006] 2. The filter of the traditional bladeless fan is arranged at the lower part. Taking the use scene of the fan on the ground as an example, the user needs to disassemble the outer shell every time the filter is replaced, and needs to bend down to take out the old filter and bend down again to replace the new filter, which is not good for the user experience, especially for the elderly to replace the filter, which has hidden dangers.

[0007] 3. Since the height of an adult is usually between 1.5 meters and 1.8 meters, the position of the filter of the existing product is obviously lower than this height, which will cause a lot of air breathed by the human body to be unfiltered.

[0008] 4. Existing products simply increase the height of the nozzle to achieve the effect of airflow from a high position. However, the longer the vertical distance that the bottom motor delivers the airflow, the weaker the airflow becomes. This results in a large airflow at the bottom of the nozzle and a small airflow at the top, which is completely opposite to the purpose of a vertical fan to deliver airflow to the upper body. Therefore, traditional bladeless fans and related improved products cannot replace the effect of a vertical fan.

[0009] 5. Existing products, when used as home appliances, can only purify the air around the area where the machine is located, making it difficult to target and enhance purification in specific areas of the room. Although existing products can change the direction of the air outlet, the direction of the air intake is fixed. Even with circumferential air intake, it is impossible to achieve enhanced purification of localized areas. For example, when someone is smoking indoors, existing products cannot target this type of localized air pollution source, resulting in a long time required to eliminate the smoke-polluted air in the room.

[0010] Therefore, the present invention provides a fan and a method of using the same. Summary of the Invention

[0011] In view of the problems in the prior art, the purpose of the present invention is to provide a fan and its usage method, which overcomes the problems of the prior art, can raise the position of air intake, prevent indoor ground air from entering the fan, concentrate the air force at a high position, and enhance the ability to purify the indoor air globally by changing the direction of air intake.

[0012] An embodiment of the present invention provides a fan, comprising:

[0013] A base;

[0014] An integral part, including an air inlet, an air outlet, a horizontal motor for generating airflow through the part, a rotary motor, and a filter; and

[0015] A nozzle is connected to the air outlet of the body for receiving and spraying airflow from the body. The rotating motor drives the body to rotate based on the base. The filter has an annular travel based on the base to change the direction of the air inlet and air outlet.

[0016] Preferably, the filter is disposed at the end of the body opposite to the nozzle, and the filter is moved as the body rotates, allowing air from different directions based on the base to enter the filter through the air inlet for filtration.

[0017] Preferably, as the body rotates, the filter is displaced based on the base.

[0018] Preferably, a support rod is further included, the lower end of the support rod is connected to the base, and the upper end of the support rod is connected to the body.

[0019] Preferably, the upper end of the support rod is provided with an eccentric power supply terminal, and the body further includes a power supply contact ring, and the power supply terminal slides along the power supply contact ring to maintain contact and electrical connection as the body rotates.

[0020] Preferably, the direction of the air inlet is perpendicular to the direction of the air outlet.

[0021] Preferably, the opening direction of the air outlet of the nozzle is parallel to the rotation axis of the horizontal motor.

[0022] Preferably, the extension direction of the support rod is perpendicular to the rotation axis of the horizontal motor.

[0023] Preferably, the air outlet direction of the horizontal motor is perpendicular to the movement direction of the air flow in the nozzle cavity.

[0024] Preferably, the projection of the air outlet and the air inlet in the height direction at least partially overlaps.

[0025] Preferably, the shell of the body is a horizontally arranged cylindrical shell, the cylindrical shell is sleeved with the horizontal motor, and the shell is provided with a plurality of air inlet holes.

[0026] Preferably, the cylindrical shell includes opposite first and second ends, the first end of the cylindrical shell is communicated with a wind guide cover, the wind guide cover guides the air flow to the bottom of the nozzle, the air flow moves to the top of the nozzle along the anti-gravity direction along the internal annular air duct of the annular nozzle of the nozzle, and is sequentially distributed to each air outlet and is emitted respectively.

[0027] Preferably, the body further includes an air inlet cover communicated with the fan motor assembly, the annular gap between the air inlet cover and the shell is filled with the filter, the filter is a tubular filter, the air inlet holes are located upstream of the tubular filter, and the tubular filter is located upstream of the air inlet cover.

[0028] Preferably, the body further includes at least one air quality detection module, the air quality parameters in different directions based on the base are detected as the body rotates, the direction with the lowest air quality parameter is taken as a target direction for air purification, and at least part of the air inlets are directed to the target direction.

[0029] The embodiment of the present application also provides a use method of the fan, which adopts the fan described above, and includes the following steps:

[0030] S110, detecting air quality parameters based on different directions of the base to obtain a target direction to be air cleaned; and

[0031] S120, driving the body to rotate to change the air outlet direction, and allowing at least part of the air inlet to face the target direction.

[0032] The fan of the present application can improve the position of air suction, avoid indoor ground air entering the fan, concentrate wind power at a high position, and enhance the ability of global air cleaning in the room by changing the direction of air inlet. BRIEF DESCRIPTION OF DRAWINGS

[0033] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings.

[0034] Figure 1 is a sectional view of a bladeless fan of the prior art.

[0035] Figure 2 is a schematic view of the external structure of the fan of the present application.

[0036] Figure 3 is a sectional view of the internal structure of the fan of the present application.

[0037] Figure 4 is a top view of the fan of the present application.

[0038] Figure 5 is a perspective view of the fan of the present application from a first viewing angle.

[0039] Figure 6 is a perspective view of the fan of the present application from a second viewing angle.

[0040] Figure 7 is a side sectional view of the fan of the present application.

[0041] Figure 8 is a top view of the fan of the present application in a first use state.

[0042] Figure 9 is a top view of the fan of the present application in a second use state.

[0043] Figure 10 is a top view of the fan of the present application in a third use state.

[0044] Figure 11 is a schematic view of the air flow direction in the air deflector and the nozzle of the fan of the present application.

[0045] Figure 12 is a schematic view of the air outlet distribution of the nozzle of the fan of the present application.

[0046] Figure 13 Schematic diagram of filter replacement for the fan of the present application.

[0047] Reference numerals

[0048] 1 body

[0049] 11 air inlet hole

[0050] 12 cover plate

[0051] 2 filter

[0052] 3 air inlet cover

[0053] 41 support rod

[0054] 42 base

[0055] 43 power supply terminal

[0056] 5 fan motor assembly

[0057] 6 air guide cover

[0058] 61 first drainage slope

[0059] 62 air distribution wall

[0060] 63 second drainage slope

[0061] 64 third drainage slope

[0062] 7 nozzle

[0063] 71 air outlet

[0064] 7A bottom

[0065] 7B top

[0066] 8 rotating motor

[0067] 81 power supply contact ring

[0068] 82 air quality detection module DETAILED DESCRIPTION

[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein. Rather, these implementations are provided as example embodiments so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be simplified or omitted.

[0070] Figure 2 Schematic diagram of the structure of the exterior of the fan of the present application. Figure 3This is a cross-sectional view of the internal structure of the fan of the present invention. Figure 4 This is a top view of the exterior of the fan of the present invention. Figures 2 to 4 As shown, the fan of the present invention includes: a base 42, a main body 1, and a nozzle 7. The main body 1 includes an air inlet, an air outlet, a horizontal motor 5 for generating airflow through the main body 1, a rotary motor 8, and a filter 2. The nozzle 7 is connected to the air outlet of the main body 1 and is used to receive and spray airflow from the main body. The rotary motor 8 drives the main body 1 to rotate based on the base 42, changing the direction of the air inlet and air outlet. In this embodiment, the rotary motor 8 can drive the main body 1 to rotate 360° horizontally based on the base 42 (see direction of motion M), thereby orienting the air inlet towards various directions of the room. The fan of the present invention can raise the position of air intake, prevent indoor surface air from entering the fan, concentrate the airflow at a high position, and enhance the ability to purify the air globally by changing the direction of air intake.

[0071] In a preferred embodiment, the projections of the air outlet and the air inlet in the height direction at least partially overlap.

[0072] In a preferred embodiment, the body 1 is driven to rotate based on the base 42 by rotating the motor 8, and the filter 2 in the body 1 is displaced based on the base 42, but this is not a limitation.

[0073] In a preferred embodiment, the direction of the air inlet and the direction of the air outlet are perpendicular to each other, but this is not a limitation.

[0074] In a preferred embodiment, the direction of the air inlet is opposite to the direction of the air outlet, but this is not a limitation.

[0075] In a preferred embodiment, the filter 2 is disposed at the end of the body 1 away from the nozzle 7. As the body 1 rotates, air from different directions based on the base enters the filter 2 through the air inlet for filtration, but this is not a limitation.

[0076] In a preferred embodiment, a support rod 41 is also included, with its lower end connected to the base 42 and its upper end connected to the body 1, but this is not a limitation.

[0077] In a preferred embodiment, the upper end of the support rod 41 is provided with an eccentrically arranged power supply terminal 43, and the body 1 also includes a power supply contact ring 81. As the body 1 rotates, the power supply terminal 43 slides circumferentially along the power supply contact ring 81 to maintain contact and electrical connection, but this is not a limitation.

[0078] In a preferred embodiment, the direction of the air inlet is perpendicular to the direction of the air outlet, the opening direction of the air outlet 71 of the nozzle 7 is parallel to the rotating shaft of the horizontal motor, the extending direction of the supporting rod 41 is perpendicular to the rotating shaft of the horizontal motor, and the air outlet direction of the horizontal motor is perpendicular to the moving direction of the air flow in the inner cavity of the nozzle 7, but the present application is not limited thereto.

[0079] In a preferred embodiment, the outer shell of the body 1 is a horizontally arranged cylindrical outer shell, the cylindrical outer shell is sleeved with the horizontal motor, and the outer shell is provided with a plurality of air inlets 11, but the present application is not limited thereto.

[0080] Figure 5 It is a perspective view of the fan of the present application from the first visual angle. Figure 6 It is a perspective view of the fan of the present application from the second visual angle. Figure 7 It is a side sectional view of the fan of the present application. Figures 5 to 7The fan of the present application comprises a body 1, a support rod 41, a base 42 and a nozzle 7. The body 1 comprises an air inlet, an air outlet, a fan motor assembly 5, a filter 2, a rotating motor 8 and an air quality detection module. The fan motor assembly 5 comprises a horizontal motor for generating air flow through the body 1. The support rod 41 supports the body 1. The nozzle 7 is connected to the body 1 based on the air outlet direction of the horizontal motor, for receiving air flow from the body, distributing the air flow along the inside of the nozzle 7 to each air outlet 71 and spraying. The body 1 is driven to rotate based on the base 42 by the rotating motor 8 to change the direction of the air inlet and the air outlet. The base 42 supports the support rod 41. The support rod 41 is a support rod, the extension direction of the support rod is perpendicular to the rotation axis of the horizontal motor. The upper end of the support rod 41 is provided with an eccentric power supply terminal 43, and the body 1 further comprises a power supply contact ring 81, so that during the 360° rotation of the body 1 based on the base 42 in the horizontal plane, the power supply terminal 43 always slides along the power supply contact ring 81 to maintain contact and electrical connection. The power supply contact ring 81 supplies power to the rotating motor 8 and the fan motor assembly 5 respectively. The opening direction of the air outlet 71 is parallel to the rotation axis of the horizontal motor. The shell of the body 1 is a horizontally arranged cylindrical shell, which sleeves the horizontal motor, and the shell is provided with a plurality of air inlet holes 11. The cylindrical shell comprises opposite first and second ends, and the first end of the cylindrical shell is communicated with a wind deflector 6, which guides the air flow to the bottom 7A of the nozzle 7, and the air flow moves along the annular air channel inside the annular nozzle to the top 7B of the nozzle 7 in the anti-gravity direction, and is then distributed to each air outlet 71 and emitted respectively. The filter 2 can be arranged in the body 1 away from the nozzle 7, and with the rotation of the body 1, the air in different directions based on the base enters the filter 2 through the air inlet for filtration. The second end of the cylindrical shell is provided with a detachable cover plate. The present application provides a bladeless fan mainly used in the scene of a vertical fan, which completely replaces the traditional vertical fan, expands the use scene and improves the user experience. The air quality detection module detects the air quality parameters in different directions based on the base with the rotation of the body 1, takes the direction with the lowest air quality parameter as the target direction for air purification, and makes at least part of the air inlet face the target direction. In this embodiment, the air quality detection module of the existing or future invention is used to detect the air quality parameter, but it is not limited thereto. In this embodiment, the indoor air quality parameter is derived from the "indoor air quality standard", which is a term in the national standard. The indoor air quality parameter is the object of indoor air quality monitoring and the detection item for evaluating indoor air quality. The higher the air quality parameter, the better the air quality, and vice versa.In a preferred embodiment, the filter 2 in the body 1 is displaced based on the base 42 by driving the body 1 to rotate based on the base 42 by the rotating motor 8, and the filter 2 also obtains a circular moving stroke centered on the base 42, compared with the fixed filter, the structure of the present application enables the filter 2 to move closer to different areas in the room, compared with the fixed filter in the prior art, the present application can increase the range of efficient air purification, but not limited thereto.

[0081] In a preferred embodiment, two air quality detection modules 82 are arranged between the air inlet hole 11 and the filter 2 on the horizontal direction of the body 1, so as to detect the air quality in two directions respectively, but not limited thereto.

[0082] In a preferred embodiment, the support rod is a liftable support pipe assembly, which includes an inner pipe and an outer pipe that move axially and are limited between each other, so as to freely adjust the vertical height of the fan air outlet, so that the ground clearance of the body 1 can reach 1.5-1.8 meters, so as to avoid sucking the dust on the ground or the table into the fan, and mainly filter the air at the height area where the human body breathes, so that the user in the room can more efficiently enjoy the filtered air, and through the active adjustment of the suction direction, the time required for purifying the overall air in the room is shortened.

[0083] Figure 8 It is a top view of the first use state of the fan of the present application. Figure 8 As shown, the surrounding area of the fan of the present application is respectively represented as A1, A2, A3, A4, A5, A6, A7, A8, A9, A10. In the case that the fan does not rotate, mainly by sucking the air in the A5, A6, A11, A12 four areas, after purification, the air is emitted to the A2, A3 area. Figure 9 It is a top view of the second use state of the fan of the present application. Figure 9 As shown, after the body 1 of the fan of the present application is driven by the rotating motor 8 to rotate to the left based on the base 42, the air inlet direction and the air outlet direction are changed, then the air in the A3, A4, A5, A9, A10, A11, etc. six areas is purified, and then emitted to the A1, A2, A12 area, it can be seen that compared with the structure of the air inlet of the bladeless fan in the prior art, the air inlet and the air outlet of the present application can be changed by rotating the body 1, so as to effectively enhance the air purification of the local area. And since the projection of the air outlet and the air inlet of the present application in the height direction at least partially overlaps, as the air inlet and the air outlet rotate synchronously, the air outlet will accelerate the air circulation in the room, so that the air inlet at the same height can suck more surrounding air, further enhancing the purification effect.

[0084] The embodiment of the present application also provides a method for using the fan, which adopts the fan described above, and comprises the following steps:

[0085] S110, detecting air quality parameters based on different directions of the base to obtain a target direction to be air-cleaned; and

[0086] S120, driving the body part to rotate to change the air outlet direction, and making at least part of the air inlet face the target direction.

[0087] Figure 10 It is a top view of the third use state of the fan of the present application. Figure 10 As shown, after 360° circumferential rotation based on Figure 7 、 8 , the air quality detection module 82 detects air quality based on different directions of the base, collects air quality parameters of each direction of the whole house, compares the air quality parameters, finds that the air quality of the direction where the A7 region is located is the worst (there is someone smoking in the A7 region), and regards the direction where the A7 region is located as the target direction to be air-cleaned, drives the body part 1 to rotate to change the air outlet direction through the rotating motor 8, and makes the air inlet on one side of the body part 1 face the target direction (the direction where the A7 region is located), so as to realize that the air quality of each direction in the room is detected through a small amount of air quality detection modules, and air suction is mainly performed on the target direction to be air-cleaned, which strengthens the efficiency of purifying indoor air and shortens the time of purifying air.

[0088] Figure 11 It is a schematic view of the movement direction of the air flow of the fan of the present application in the air guide cover and the nozzle. As shown in Figure 7 and 11 , the nozzle 7 is a hollow annular nozzle, and a plurality of air outlets 71 are distributed along the extension direction of the inner cavity of the annular nozzle on the side of the annular nozzle away from the body part 1. In one preferred example, the internal pipeline of the nozzle 7 gradually reduces the flow area with the change of the position from the bottom 7A to the top 7B of the nozzle 7, so as to play the effect of remote pressurization, but is not limited thereto.

[0089] The air guide cover 6 in the embodiment at least comprises a first flow guide slope 61, a wind distribution wall 62, a second flow guide slope 63 and a third flow guide slope 64. The first flow guide slope 61 is a slope surface, which guides the air flow generated by the fan motor assembly 5 to deflect 70° to 85° downward from the horizontal direction (preferably 80°), and the air outlet direction of the horizontal motor is perpendicular to the movement direction of the air flow in the inner cavity of the nozzle 7, but is not limited thereto.

[0090] The air distribution wall 62 is arranged vertically, and the left and right sides of the air distribution wall 62 are respectively formed with the arc-shaped second air distribution slope 63 and the third air distribution slope 64, which extend to the left and right sides in an arc shape. The air distribution wall 62 divides the air flow introduced by the first air distribution slope 61 into a first air branch flow and a second air branch flow. The first air branch flow enters the internal pipeline on the left side of the nozzle 7, moves to the top 7B of the nozzle 7 in a clockwise direction (clockwise upward), and is sprayed through the air outlets 71 on the left side of the nozzle 7. Similarly, the second air branch flow enters the internal pipeline on the right side of the nozzle 7, moves to the top 7B of the nozzle 7 in a counterclockwise direction (counterclockwise upward), and is sprayed through the air outlets 71 on the right side of the nozzle 7, but the present application is not limited thereto.

[0091] In the present embodiment, the first air distribution slope 61, the air distribution wall 62, the second air distribution slope 63, and the third air distribution slope 64 are realized by the surfaces of different parts of the same air distribution structure, but the present application is not limited thereto. The present application realizes the smooth guidance of the linear air flow to the air outlets 71 of different nozzles 7 after the air flow is distributed, thereby reducing noise, avoiding the reduction of air pressure when the air flow direction is adjusted, maintaining the air volume of the air flow, and making the air volume of the air flow emitted by the nozzle 71 basically close to the air volume of the air flow generated by the fan motor assembly 5, thereby maximizing the reduction of the loss of wind power caused by the internal pipeline.

[0092] Figure 12 The present application is a schematic diagram of the air outlets of the nozzle of the fan. As shown in Figure 12 The flow area of each air outlet 71 gradually increases with the change of the position from the bottom 7A to the top 7B of the nozzle 7. In the present embodiment, the air volume of each air outlet 71 at different heights is basically equal by optimizing and adjusting the opening area of the air outlet at different positions, but the present application is not limited thereto. The air outlet 71 can also be a circular opening, an oval opening, etc., but the present application is not limited thereto.

[0093] In a preferred embodiment, the air outlet 71 is a rectangular opening, and the length of the long side of the rectangular opening gradually increases as the air outlet 71 rises from the bottom 7A to the top 7B of the nozzle 7 based on the position of the nozzle 7, but the present application is not limited thereto.

[0094] In a preferred embodiment, the air outlet 71 is a rectangular opening, and the length of the short side of the rectangular opening gradually increases as the air outlet 71 rises from the bottom 7A to the top 7B of the nozzle 7 based on the position of the nozzle 7, but the present application is not limited thereto.

[0095] Figure 13 The present application is a schematic diagram of the fan replacing the filter. As shown in Figure 13As shown, the body 1 is further provided with an air inlet cover 3 connected with the fan motor assembly 5, and an annular gap between the air inlet cover 3 and the shell is filled with a tubular filter 2, the air inlet hole 11 is located upstream of the tubular filter 2, and the tubular filter 2 is located upstream of the air inlet cover 3. The second end of the cylindrical shell is provided with a detachable cover plate 12, and the detachable cover plate 12 exposes the replaceable filter 2. In this embodiment, the filter 2 is a tubular filter, the body 1 is further provided with an air inlet cover 3 connected with the fan motor assembly 5, and an annular gap between the air inlet cover 3 and the shell forms an annular channel for inserting the tubular filter, and the central axis of the annular channel is parallel to the rotation axis of the horizontal motor. The annular channel is filled with the tubular filter 2, the air inlet hole 11 is located upstream of the tubular filter 2, and the tubular filter 2 is located upstream of the air inlet cover 3.

[0096] And, continuing to refer to Figure 12 , the present application can replace the fan internal filter 2 through the following steps:

[0097] S210, detach the cover plate at the second end of the cylindrical shell to expose the filter to be replaced;

[0098] S220, pull out the filter to be replaced in a direction parallel to the rotation axis of the horizontal motor;

[0099] S230, insert another filter along the rotation axis of the horizontal motor; and

[0100] S240, install the cover plate back to the second end of the cylindrical shell.

[0101] The filter in the present application is located in the upper region of the whole machine, and the user can completely replace the filter in an upright state without bending down, thereby reducing the physical effort of the user and greatly optimizing the process of replacing the filter.

[0102] In summary, the purpose of the present application is to provide a fan that can improve the position of air suction, avoid indoor ground air entering the fan, concentrate wind power at a high position, and enhance the ability to purify the overall air in the room by changing the direction of air intake.

[0103] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A fan, characterized by, The utility model relates to a kind of air purifiers, comprising: A base (42); A body (1), comprising air inlet, air outlet, for generating air flow through the body (1) as fan motor assembly (5) horizontal motor, rotating motor (8) and filter (2), the projection of the air outlet and the air inlet in height direction at least partially overlap; And A nozzle (7) is connected to the air outlet of the body (1), for receiving and ejecting air flow from the body, the rotating motor (8) drives the body (1) to rotate based on the base (42) to change the direction of the air inlet and air outlet; The shell of the body (1) is a horizontally arranged cylindrical shell, the cylindrical shell sleeves the fan motor assembly (5), the shell is provided with a plurality of air inlet holes (11), the filter (2) is arranged in the body (1) away from the end of the nozzle (7), with the rotation of the body (1), the filter (2) has a circular movement stroke centered on the base (42), so that air in different directions enters the filter (2) for filtering, the body (1) further comprises: two air quality detection modules (82) are arranged between the air inlet holes (11) and the filter (2) on both sides of the body (1) in horizontal direction respectively, the air quality in two directions is detected respectively, the air quality parameters in different directions are detected with the rotation of the body (1), the direction with the lowest air quality parameter is taken as the target direction to be air cleaned, and at least part of the air inlet is directed towards the target direction.

2. The fan of claim 1, wherein, Further comprising a support rod (41), the lower end of the support rod (41) is connected to the base (42), and the upper end is connected to the body (1).

3. The fan of claim 2, wherein, The upper end of the support rod (41) is provided with an eccentric power supply terminal (43), and the body (1) further comprises a power supply contact ring (81), with the rotation of the body (1), the power supply terminal (43) slides along the power supply contact ring (81) to maintain contact and electrical connection.

4. The fan of claim 3, wherein The direction of the air inlet is perpendicular to the direction of the air outlet, the opening direction of the air outlet (71) of the nozzle (7) is parallel to the rotation axis of the horizontal motor, the extension direction of the support rod (41) is perpendicular to the rotation axis of the horizontal motor, and the air outlet direction of the horizontal motor is perpendicular to the movement direction of the air flow in the cavity of the nozzle (7).

5. The fan of claim 4, wherein, The cylindrical shell comprises opposite first end and second end, the first end of the cylindrical shell is communicated with a wind deflector (6), the wind deflector (6) guides the air flow to the bottom (7A) of the nozzle (7), the air flow moves to the top (7B) of the nozzle (7) along the internal annular air duct of the annular nozzle of the nozzle (7) in the direction of anti-gravity, and is emitted respectively after being dispersed to each air outlet (71) in turn.

6. The fan of claim 5, wherein, The body (1) is further provided with an air inlet cover (3) connected to the fan motor assembly (5), an annular gap between the air inlet cover (3) and the housing is filled with the filter (2), the filter (2) is a tubular filter (2), the air inlet hole (11) is located upstream of the tubular filter (2), and the tubular filter (2) is located upstream of the air inlet cover (3).

7. A method of using a fan, comprising: The fan as claimed in claim 6 is adopted, comprising the following steps: Detecting air quality parameters in different directions to obtain a target direction to be air cleaned; and Driving the body to rotate to change the air outlet direction, and allowing at least part of the air inlet to face the target direction.

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