CN111075741B

CN111075741B - Column flow back spray expansion bladeless air purifier fan

Info

Publication number: CN111075741B
Application number: CN201911051871.5A
Authority: CN
Inventors: 谢奇峰
Original assignee: Dongguan Zhuoqifeng Intelligent Technology Co ltd
Current assignee: Dongguan Zhuoqifeng Intelligent Technology Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2025-09-30
Anticipated expiration: 2039-10-31
Also published as: CN111075741A

Abstract

The invention discloses a post flow back spray expansion vaneless air purifying fan, which comprises a base and a post flow back spray expansion nozzle, wherein the post flow back spray expansion nozzle is arranged above the base and can rotate a swinging head for 360 degrees relative to the base, the base comprises a shell, a turbine core machine and an air filter, the shell is hollow, the bottom of the shell is an air inlet, the top of the shell is an air outlet, the turbine core machine is arranged in the shell and sucks air from the air inlet and bulges out from the air outlet, the bottom of the shell is provided with a chassis, a filter mounting cavity is arranged in the chassis, and the air filter is assembled at the filter mounting cavity to isolate an air channel between the air inlet and the turbine core machine. The novel three-dimensional air-out device has the advantages that the structural layout is simple and ingenious, the appearance is neat and easy to clean, the three-dimensional air-out device can shake the head by 360 degrees, and a mysterious experience is provided for a user.

Description

Post flow back spray expansion vaneless air purifying fan

Technical Field

The invention relates to the technology of the field of fans, in particular to a post-flow back-spraying expansion vaneless air purifying fan.

Background

The patent issued on publication day CN 106122050B discloses a fan, which is a patent product of dyson technology limited, such fan assembly comprising:

A body comprising an air inlet, an air outlet, and means for generating an air flow through the body, the body comprising a lower body section and an upper body section, the upper body section housing means for generating an air flow, the lower body section housing control circuitry for controlling the means for generating an air flow, and

A nozzle for receiving an air flow from the body and emitting the air flow;

Wherein the lower body section comprises an outer wall and an inner wall defining an outer cavity surrounding the inner cavity, and wherein the control circuit is positioned in the inner cavity surrounded by the inner wall,

And wherein the lower body section comprises means for rotating the upper body section relative to the lower body section.

The above patent product has a large market in the market, however, due to the structural design thereof, the fan is limited to be more functional and is more simple and convenient to use, wherein:

1. The body is of complex construction, comprising a lower body section and an upper body section, and the filter is annular, arranged in the upper body section, and also a core machine. The lower body section mounts all electrical components. The lower body section also accommodates mechanisms or the like for swinging the main body section relative to the lower body section, making the overall body layout more complex, and the entire body cannot be made shorter and smaller because of the space required for assembly of the components.

And secondly, the layout of the filter reduces the air inlet of the fan. The filter is described in paragraph [ 0125 ] of the specification, and has a plurality of layers including an outer layer of pleated High Efficiency Particulate Air (HEPA) filter, an inner layer of activated carbon cloth, a perforated shroud, and an air inlet is one or more grids or screens mounted in windows in the shroud. Therefore, the air intake is firstly reduced by the shield with holes for the first time, and the air intake is reduced for the second time by the outer layer of the pleated high-efficiency particulate air (HEPA) filter, and the air intake is limited by the inner layer of the activated carbon cloth for the third time. In addition, the long term intake of air into the perforated shroud causes dust to accumulate on these grills or screens, which, in addition to further reducing the intake, presents a problem of difficult cleaning.

3. The amplitude of the oscillation of the fan is limited, although its lower body section comprises means for rotating the upper body section relative to the lower body section, according to the description of paragraph [0123], the range of each oscillation period of the main body section relative to the lower body section is preferably between 60 ° and 120 °. It is known that the swing amplitude of this fan is not different from that of the conventional fan, and if the swing amplitude is too large, the electric wire for power supply may be broken, so that it cannot swing at any angle of 360 °.

The above technology is a breakthrough technology required by the person skilled in the art, and thus the invention is created.

Disclosure of Invention

In view of the above, the main purpose of the invention is to provide a post-flow back-spray expansion bladeless air purification fan which has simple and smart structural layout, neat and easy cleaning appearance, and can swing for 360 degrees to realize three-dimensional air outlet, thereby overcoming the defects of the prior art.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the post flow back spray flow expansion bladeless air purification fan comprises a base and a post flow back spray flow expansion nozzle, wherein the post flow back spray flow expansion nozzle is arranged above the base and can rotate a swinging head relative to the base by 360 degrees, the base comprises a shell, a turbine core machine and an air filter, the shell is hollow, the bottom of the shell is an air inlet, the top of the shell is an air outlet, the turbine core machine is arranged in the shell, the turbine core machine sucks air from the air inlet and bulges out from the air outlet, a chassis is arranged at the bottom of the shell, a filter mounting cavity is arranged in the chassis, and the air filter is assembled at the filter mounting cavity to isolate an air channel between the air inlet and the turbine core machine.

As a preferred scheme, the chassis of the shell is a square seat, the air filter is of a side drawer type rapid-replacement structure, and the air filter can be matched in a filter installation cavity of the chassis in a sliding manner.

As a preferred scheme, air cleaner includes pull box, filter core, the pull box has four sides curb plate and bottom plate, encloses between this four sides curb plate and the bottom plate and closes and form a filter core and hold the chamber, the air intake is seted up on one of them one side curb plate, and sets up the baffle and separates the air inlet into even multichannel along the air inlet direction on the bottom plate, the filter core bears on the baffle.

As a preferable scheme, the chassis of the shell is a round seat, the air filter is of a replaceable structure of a buckle type or threaded connection, and the air filter is buckled or screwed with the chassis from the bottom upwards to form matching.

As a preferable scheme, the bottom of the chassis is provided with a bottom plate and supporting legs, at least one air inlet is hidden among the filter element, the bottom plate and two adjacent supporting legs.

As a preferable scheme, the turbine core machine is internally provided with a 360-degree rotary head shaking mechanism, and the turbine core machine comprises a rotary driving mechanism and a bearing, one end of the rotary driving mechanism is fixedly arranged on the turbine core machine, the other end of the driving mechanism is connected with a connecting point of the center of the post flow back spraying and expanding nozzle, the bearing is arranged above the shell, and the bottom of the post flow back spraying and expanding nozzle is connected with the bearing.

As a preferable scheme, the rotary driving mechanism comprises a motor, a driving piece, a first rotary sleeve, an elastic reset piece and a second rotary sleeve, wherein the second rotary sleeve is connected with a post flow back spray expansion nozzle;

The first rotating sleeve and the driving piece are locked or separated through the first clutch mechanism, when the first rotating sleeve is locked with the driving piece, the first rotating sleeve rotates together with the driving piece, and when the first rotating sleeve is separated from the driving piece, the driving piece idles;

The elastic reset piece is abutted between the first rotating sleeve and the second rotating sleeve, a second clutch mechanism is arranged between the first rotating sleeve and the second rotating sleeve, the first rotating sleeve and the second rotating sleeve are locked or separated through the second clutch mechanism, when the first rotating sleeve and the second rotating sleeve are locked, the first rotating sleeve and the second rotating sleeve rotate together, so that the post flow back-spraying expansion nozzle is driven to rotate for shaking the head by 360 degrees, and when the first rotating sleeve and the second rotating sleeve are separated, the first rotating sleeve idles.

As a preferable scheme, the driving piece is provided with a disc, the upper surface of the disc is provided with a circular arc-shaped first clamping groove, the bottom of the first rotating sleeve is provided with a first boss, and when the first boss falls into the first clamping groove, the driving piece and the first rotating sleeve can rotate together in a locking way;

As a preferable scheme, the outer surface of the convex column of the first rotating sleeve is provided with a second clamping groove, the inner surface of the convex column of the second rotating sleeve is provided with a second boss, and when the second boss falls into the second clamping groove, the first rotating sleeve and the second rotating sleeve can rotate together in a locking way.

As a preferable scheme, the post flow back spray flow expansion nozzle is a columnar body and comprises a column body with a height, the column body is divided into a front part and a rear part, a ventilation cavity is arranged in the column body, a back spray opening is arranged at least at the rear part of the column body, the ventilation cavity is communicated with the back spray opening through an arc runner, and wind sprayed from the back spray opening is blown to the front side from the rear side against the outer wall of the column body.

Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, according to the technical proposal,

First, the structure of this product constitutes simply, and the overall arrangement mode that forms between each subassembly is novel, and easy installation. The base is provided with the shell, the turbine core machine and the air filter, and the turbine core machine is made into a whole, so that the installation can be realized quickly. The air filter is arranged below the turbine core machine, and is close to the ground at the bottom of the shell, so that the air inlet is hidden, the fan is neat, the existence of the air inlet is invisible from the outside, and a mysterious experience is provided for a user. And, this simple structural composition and layout also enables the base to become shorter, saving space.

Secondly, the air filter is not in a traditional cylindrical barrel shape any more, the cover is in a flat plate shape, firstly, the flat plate-shaped filter is easier to produce/purchase, so that the cost is reduced, on the other hand, the flat plate-shaped air filter isolates an air channel between an air inlet and a turbine core machine, air enters from the bottom and passes through the air filter, and is directly led to the turbine core machine, so that the whole air channel is relatively more directly led, turns are less, and the air inlet quantity is increased.

Thirdly, the post flow back spray expanding nozzle of the product can rotate relative to the base by 360 degrees to shake the head and blow the air at the same time, thereby forming a three-dimensional air-out fan. Compared with the traditional design that only one angle can be used for air outlet or the design that only a certain range of air outlet is available, the bladeless fan with 360-degree three-dimensional air outlet brings more novel experience to people.

Fourth, the nozzle of this product is post flow back and spouts the flow nozzle that expands, and for traditional only forward blowout's nozzle, the air output is bigger, and the wind of blowing out is softer even to back spray's mode gives a novel mystery sense, and the consumer can cool in addition, also better exploration "the air inlet is the enjoyment experience of where to advance", where the air outlet is.

In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is an assembled perspective view of a bladeless fan (square hub) according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view of A-A in fig. 1.

Fig. 3 is a schematic view of the fan of fig. 1 with the post-flow back-spray diffuser nozzle removed from the base.

Fig. 4 is a cross-sectional view of B-B in fig. 3.

Fig. 5 is a cross-sectional view of C-C in fig. 3.

Fig. 6 is a schematic view showing a state in which the drawer type air filter of the first embodiment of the present invention is detached from the base.

Fig. 7 is a perspective view of a turbine core machine according to a first embodiment of the present invention.

Fig. 8 is an exploded view of a rotary drive mechanism according to a first embodiment of the present invention.

Fig. 9 is a schematic view of a rotary drive mechanism and bearing of a first embodiment of the present invention.

FIG. 10 is a schematic view showing the internal structure of a post-flow back-spray diffuser nozzle according to a first embodiment of the present invention.

FIG. 11 is a cross-sectional view of a post-flow back-spray diffuser nozzle according to a first embodiment of the present invention.

Fig. 12 is an enlarged view of a portion of fig. 11.

Fig. 13 is an assembled perspective view of a bladeless fan (square seat circular) according to a second embodiment of the present invention.

Fig. 14 is an assembled perspective view of a bladeless fan (square-base oblong ring) according to a third embodiment of the present invention.

Fig. 15 is an assembled perspective view of a bladeless fan (circular base with long circular ring shape) according to a fourth embodiment of the present invention.

Fig. 16 is an assembled perspective view of a bladeless fan (hub) according to a fourth embodiment of the present invention.

Fig. 17 is a cross-sectional view of a bladeless fan (circular hub) according to a fourth embodiment of the present invention.

The attached drawings are used for identifying and describing:

10. Base 11, casing

111. Air inlet 112 and air outlet

113. Chassis 114, filter mounting cavity

115. Air duct 116 and supporting feet

12. Turbine core machine

13. Air filter 14, drawing box

141. Side plate 142 and bottom plate

143. Filter element accommodating cavity 144 and partition board

15. Filter element 16 and rotary driving mechanism

161. Motor 162 and driving member

163. First rotating sleeve 164 and elastic restoring member

165. Second rotating sleeve 166 and first clutch mechanism

1661. First clamping groove 1662 and first boss

167. Second clutch mechanism 1671, second slot

1672. Second boss 17, bearing

20. Post flow back spray flow expansion nozzle 21 and post body

211. Front face 212, rear face

213. Venting cavity 214, back ejection port

2141. First back ejection opening 2142, second back ejection opening

215. Circular arc runner 216, positive jet.

Detailed Description

Referring to fig. 1 to 12, a specific structure of a first embodiment of the present invention is shown, which includes a base 10 and a post back spray diffuser nozzle 20, wherein the post back spray diffuser nozzle 20 is mounted above the base 10 and can rotate relative to the base 10 by 360 degrees to swing, and the post back spray diffuser nozzle 20 can be detached from the base 10 for easy storage.

The base 10 is simple and compact in structure, and comprises a housing 11, a turbine core 12 and an air filter 13. In terms of arrangement, the housing 11 is hollow with sealed periphery, the turbine core 12 and the air filter 13 are both installed in the housing 11, and the air filter 13 is located below the turbine core 12.

More specifically, as shown in fig. 4 and 5. The shell 11 is hollow, the bottom of the shell 11 is an air inlet 111, and the top is an air outlet 112. The turbine core 12 is installed in the housing 11, the turbine core 12 sucks air from the air inlet 111, bulges from the air outlet 112, and forms fast ejected air flows after passing through the turbine core 12, the air flows finally flow towards the post back-spraying and expanding nozzle 20, and the post back-spraying and expanding nozzle 20 ejects air to form a three-dimensional air outlet state. In particular, the bottom of the housing 11 has a bottom plate 113, and a filter mounting cavity 114 is disposed in the bottom plate 113, and the air filter 13 is mounted in the filter mounting cavity 114 to isolate an air duct 115 between the air inlet 111 and the turbine core 12. The fan is different from the traditional side air inlet, the air inlet 111 is positioned at the bottom of the shell 11, the air inlet passes through the air filter 13 at the bottom and then bulges out from the air outlet 112, and the base 10 has the advantages that firstly, the structure is simple, the base 10 is composed of only three parts, namely the shell 11, the turbine core 12 and the air filter 13, and the turbine core 12 is easy to assemble, and only the turbine core 12 is required to be assembled into the shell 11 from the bottom upwards during the assembly, and then the air filter 13 is inserted from the position of the air inlet 111.

In the present embodiment, as shown in fig. 6, the chassis 113 of the housing 11 is a square seat, the air filter 13 is a side drawer type quick-replaceable structure, and the air filter 13 is slidably matched in the filter mounting cavity 114 of the chassis 113. The structural design ensures that the air filter 13 is more convenient to replace and clean, the connection between the air filter 13 and the shell 11 is screw-free, and the air filter is convenient to use by only slightly drawing out.

As shown in connection with fig. 4 to 6, the air filter 13 comprises a drawer 14, a filter insert 15. The drawing box 14 has four side plates 141 and a bottom plate 142, a filter element accommodating cavity 143 is formed by enclosing the four side plates 141 and the bottom plate 142, the air inlet 111 is formed on one side plate 141, a partition 144 is arranged on the bottom plate 142 along the air inlet direction to divide the air inlet into uniform multiple channels, and the filter element 15 is supported on the partition 144. The design can make the air intake more uniform, and fully utilize the filtering function of each position of the filter element 15.

The post flow back spray flow expansion nozzle 20 of the product can rotate relative to the base 10 by 360 degrees to shake the head and blow the air at the same time, thereby forming a three-dimensional air-out fan. Compared with the traditional design that only one angle can be used for air outlet or the design that only a certain range of air outlet is available, the bladeless fan with 360-degree three-dimensional air outlet brings more novel experience to people.

More specifically, as shown in fig. 2 and fig. 7 to fig. 9, the turbine core 12 is internally provided with a 360-degree rotary head shaking mechanism, which comprises a rotary driving mechanism 16 and a bearing 17, one end of the rotary driving mechanism is fixedly installed on the turbine core 12, the other end of the driving mechanism is connected with a connection point at the center of the post-flow back-spraying and expanding nozzle 20, the bearing 17 is installed above the shell 11, and the bottom of the post-flow back-spraying and expanding nozzle 20 receives the bearing 17. In this way, when the post back spray expanding nozzle 20 is assembled on the base 10, and the rotation function is started, the rotation driving mechanism 16 applies torque to the central connection point of the post back spray expanding nozzle 20, and the outer periphery of the post back spray expanding nozzle 20 is directly connected to the bearing 17, so that the post back spray expanding nozzle 20 can rotate by 360 degrees to swing.

In this embodiment, the rotary driving mechanism 16 includes a motor 161, a driving member 162, a first rotating sleeve 163, an elastic reset member 164, and a second rotating sleeve 165, where the second rotating sleeve 165 is connected to the post back spray diffuser nozzle 20, and by means of separating/combining these components, the motor 161 is implemented to rotate and finally drive the post back spray diffuser nozzle 20 to rotate, and the post back spray diffuser nozzle 20 can be inserted into and mounted on the base 10 at any angle, so that linkage can be implemented.

As shown in fig. 4 and 5, the motor 161 is fixed in the turbine core 12, the driving member 162 is mounted on an output shaft of the motor 161, and is driven to rotate together with the driving member 162 by the motor 161, a first clutch mechanism 166 is arranged between the first rotating sleeve 163 and the driving member 162, the first rotating sleeve 163 is locked or separated from the driving member 162 by the first clutch mechanism 166, when the first rotating sleeve 163 is locked with the driving member 162, the first rotating sleeve 163 rotates together with the driving member 162, and when the first rotating sleeve 163 is separated from the driving member 162, the driving member 162 idles. As shown in fig. 8, the first clutch mechanism 166 has a structure in which the driving member 162 has a disc, a circular arc-shaped first slot 1661 is disposed on an upper surface of the disc, a first boss 1662 is disposed at a bottom of the first rotating sleeve 163, and when the first boss 1662 falls into the first slot 1661, the driving member 162 and the first rotating sleeve 163 are locked to rotate together.

The elastic restoring member 164 abuts between the first rotating sleeve 163 and the second rotating sleeve 165. In this embodiment, the elastic restoring member 164 is a spring, and the spring makes the second rotating sleeve 165 float up and down. When the post back spray diffuser nozzle 20 is assembled to the base 10, the second rotating sleeve 165 is pressed downward, so that the spring is compressed, the locking of the first rotating sleeve 163 and the second rotating sleeve 165 is prepared, and when the post back spray diffuser nozzle 20 is removed, the second rotating sleeve 165 is sprung upward, and the motor 161 drives the first rotating sleeve to idle. The details are that a second clutch mechanism 167 is arranged between the first rotating sleeve 163 and the second rotating sleeve 165, the first rotating sleeve 163 is locked or separated from the second rotating sleeve 165 through the second clutch mechanism 167, when the first rotating sleeve 163 is locked with the second rotating sleeve 165, the first rotating sleeve 163 and the second rotating sleeve 165 rotate together, so that the post-flow back-spraying expansion nozzle 20 is driven to rotate for shaking the head by 360 degrees, and when the first rotating sleeve 163 is separated from the second rotating sleeve 165, the first rotating sleeve 163 idles.

The second clutch mechanism 167 may be configured as shown in fig. 8, the outer surface of the boss of the first rotating sleeve 163 is provided with a second slot 1671, the inner surface of the boss of the second rotating sleeve 165 is provided with a second boss 1672, and when the second boss 1672 falls into the second slot 1671, the first rotating sleeve 163 and the second rotating sleeve 165 are locked to rotate together. The shapes and structures of the first boss 1662, the first slot 1661, the second boss 1672, and the second slot 1671 are not limited to those shown in the drawings, and may be one or more.

And as shown in fig. 10 to 12, the post-flow back-spraying and expanding nozzle 20 is a cylindrical body, and comprises a post 21 with a height, the post 21 is divided into a front 211 and a rear 212, a ventilation cavity 213 is arranged inside the post 21, a back spraying opening 214 is arranged at least at the rear 212 of the post 21, the ventilation cavity 213 is communicated with the back spraying opening 214 through an arc runner 215, so that wind sprayed from the back spraying opening 214 is blown to the front 211 from the rear 212 against the outer wall of the post 21.

The number of the back ejection openings 214 is two, namely, a first back ejection opening 2141 and a second back ejection opening 2142 which are symmetrical left and right, the first back ejection opening 2141 and the second back ejection opening 2142 are respectively positioned at the left rear side and the right rear side of the rear face 212 of the column 21, and the first back ejection opening 2141 and the second back ejection opening 2142 extend from the upper end to the lower end of the column 21. And, a positive ejection port 216 may be further provided at the front 211 of the cylinder 21. The front 211 and the rear 212 of the column 21 are divided along a dividing line X, which is defined in a direction in which the center point O of the column 21 extends left and right.

During operation, strong wind blown out by the base 10 enters the ventilation cavity 213 from the bottom of the cylinder 21 for first boosting, then rushes to the boosting channel from the ventilation cavity 213, and performs second boosting in the gradually narrowed boosting channel, so that wind flowing at high speed is sprayed out from the first back spraying port 2141 and the second back spraying port 2142, and is blown to the front 211 from the rear 212 against the outer wall of the cylinder 21, when the wind blows out from the rear 212 of the outer wall of the cylinder 21, external air is continuously sucked, the external air is driven to be gathered and then is discharged from the front 211 of the cylinder 21 to form a three-dimensional air-out mode, and then the three-dimensional air-out mode of 360-degree rotation of the post flow back spraying and expanding nozzle 20 can be realized by combining with the 360-degree rotation of the swinging mechanism. When the positive ejection ports 216 are simultaneously opened, the wind flowing at a high speed in the pressure increasing passage is simultaneously ejected from the positive ejection ports 216, enhancing the three-dimensional air outlet.

As shown in fig. 1, the chassis 113 of the post-flow back-spray expansion vaneless air purifying fan is a square seat in appearance, and the post-flow back-spray expansion nozzle 20 thereof is a heart type, however, other types may be adopted, for example, the base 10 of the square seat may be provided with a post-flow back-spray expansion nozzle 20 (see fig. 13) in a right circular column shape, or may be provided with a ring-shaped nozzle (see fig. 14).

In another embodiment, as shown in fig. 15, the chassis 113 of the housing 11 is a circular seat, the air filter 13 is a replaceable structure with a snap-fit or screw connection, and the air filter 13 is snapped or screwed onto the chassis 113 from the bottom to form a matching. And, such a base with circular base chassis 113 can still be freely installed and used in match with each of the cylindrical post back spray diffuser nozzles 20 (see fig. 16), the core-shaped post back spray diffuser nozzles 20, and the annular nozzle. As shown in fig. 16 and 17, the bottom of the chassis 113 has a bottom plate 142 and supporting legs 116, at least one air inlet 111 is hidden between the filter element 15, the bottom plate 142 and two adjacent supporting legs 116, so that the air inlet 111 and the air outlet have hidden characteristics as a whole, and mystery is added to a user.

The working principle of the product of the invention and the using process are as follows:

Referring to fig. 4, air enters from an air inlet 111 at the bottom of the base 10, is filtered by an air filter 13, is pumped into the turbine core 12, is sprayed into the post back spray diffuser nozzle 20 from an air outlet 112 at the top of the base 10, is boosted by the post back spray diffuser nozzle 20 to form a fast air flow, and is sprayed out from the back spray orifice 214 and/or the positive spray orifice 216 to form an air outlet. After the shaking function is started, the base 10 is not moved, the whole post flow back-spraying expansion nozzle 20 can shake the head relative to the base 10 by 360 degrees, a three-dimensional 360-degree air outlet effect is formed, and the defect that a general fan can shake the head only in a small angle range at present is overcome.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.

Claims

1. A column flow back jet expansion bladeless air purifier fan, characterized in that it comprises a base (10) and a column flow back jet expansion nozzle (20), wherein the column flow back jet expansion nozzle (20) is installed above the base (10) and can rotate 360 degrees relative to the base (10); the base (10) comprises a shell (11), a turbine core (12), and an air filter (13); the shell (11) is hollow inside, the bottom of the shell (11) is an air inlet (111), and the top is an air outlet (111). 12), the turbine core engine (12) is installed in the housing (11) to suck air from the air inlet (111) and blow it out from the air outlet (112) to the column flow back jet expansion nozzle (20), the bottom of the housing (11) is provided with a chassis (113), the chassis (113) is provided with a filter installation cavity (114), the air filter (13) is installed in the filter installation cavity (114) to isolate the air duct (115) between the air inlet (111) and the turbine core engine (12);

The column flow back jet expansion nozzle (20) is a columnar body, comprising a column (21) with a height, the column (21) being divided into a front portion (211) and a rear portion (212), the interior of the column (21) being a ventilation cavity (213), a back jet port (214) being provided at least at the rear portion (212) of the column (21), and a front jet port (216) being provided at the front portion (211) of the column (21), the ventilation cavity (213) and the back jet port (214) being communicated with each other through an arc flow channel (215), so that the wind ejected from the back jet port (214) is blown from the rear portion (212) to the front portion (211) along the outer wall of the column (21);

The air filter (13) includes a pull-out box (14) and a filter element (15). The pull-out box (14) has four side panels (141) and a bottom panel (142). The four side panels (141) and the bottom panel (142) enclose a filter element accommodating chamber (143). The air inlet (111) is opened on one of the side panels (141), and a partition (144) is provided on the bottom panel (142) along the air inlet direction to divide the air into uniform multiple channels. The filter element (15) is supported on the partition (144).

2. The column flow back-spray expansion bladeless air purifier fan according to claim 1 is characterized in that: the chassis (113) of the shell (11) is a square seat, and the air filter (13) is a side drawer-type quick-replaceable structure, and the air filter (13) can be pushed and pulled to match the filter installation cavity (114) of the chassis (113).

3. The column flow back-spray expansion bladeless air purifier fan according to claim 1 is characterized in that: the chassis (113) of the shell (11) is a round seat, and the air filter (13) is a replaceable structure of a snap-on or threaded connection, and the air filter (13) is snapped or screwed onto the chassis (113) from the bottom upward to form a match.

4. The column flow back-spray expansion bladeless air purifier fan according to claim 2 or 3, characterized in that: the bottom of the chassis (113) has a bottom plate (142) and supporting feet (116), and there is at least one air inlet (111), which is hidden between the filter element (15), the bottom plate (142) and two adjacent supporting feet (116).

5. The column flow back jet expansion bladeless air purification fan according to claim 1 is characterized in that: a 360-degree rotating shaking mechanism is provided in the turbine core engine (12), comprising a rotating drive mechanism (16) and a bearing (17), one end of the rotating drive mechanism is fixedly mounted on the turbine core engine (12), and the other end is connected to the connection point at the center of the column flow back jet expansion nozzle (20), the bearing (17) is mounted above the housing (11), and the bottom of the column flow back jet expansion nozzle (20) supports the bearing (17).

6. The column flow back jet expansion bladeless air purifier fan according to claim 5, characterized in that: the rotation drive mechanism (16) includes a motor (161), a driving member (162), a first rotating sleeve (163), an elastic reset member (164), and a second rotating sleeve (165); the second rotating sleeve (165) is connected to the column flow back jet expansion nozzle (20); the motor (161) is fixed in the turbine core (12), and the driving member (162) is installed on the output shaft of the motor (161), and drives the driving member (162) to rotate together with the motor (161) when it is started; a first clutch mechanism (166) is provided between the first rotating sleeve (163) and the driving member (162); the elastic reset member (164) abuts between the first rotating sleeve (163) and the second rotating sleeve (165), and a second clutch mechanism (167) is provided between the first rotating sleeve (163) and the second rotating sleeve (165).

7. The column flow back-spray expansion bladeless air purification fan according to claim 6, characterized in that: the driving member (162) has a disc, and a first arc-shaped groove (1661) is provided on the upper surface of the disc, and a first boss (1662) is provided at the bottom of the first rotating sleeve (163), and the first groove (1661) and the first boss (1662) form a first clutch mechanism (166), and when the first boss (1662) falls into the first groove (1661), the driving member (162) and the first rotating sleeve (163) are locked and can rotate together.

8. The column-flow back-spray expansion bladeless air purifier fan according to claim 6 or 7, characterized in that: the outer surface of the convex column of the first rotating sleeve (163) is provided with a second groove (1671), and the inner surface of the convex column of the second rotating sleeve (165) is provided with a second boss (1672), and the second groove (1671) and the second boss (1672) form a second clutch mechanism (167), and when the second boss (1672) falls into the second groove (1671), the first rotating sleeve (163) and the second rotating sleeve (165) are locked and can rotate together.