Column flow back spray expansion bladeless air purifier fan

Abstract

The present invention discloses a column flow back jet expansion bladeless air purifier fan, comprising a base and a column flow back jet expansion nozzle, the column flow back jet expansion nozzle being mounted above the base and being able to rotate and shake its head 360 degrees relative to the base; the base comprising a shell, a turbine core engine, and an air filter, the interior of the shell being hollow, the bottom of the shell being an air inlet, and the top being an air outlet, the turbine core engine being mounted in the shell, sucking air from the air inlet and blowing it out from the air outlet; the bottom of the shell being provided with a chassis, the chassis being provided with a filter mounting cavity, the air filter being mounted in the filter mounting cavity to isolate the air duct between the air inlet and the turbine core engine. The structural layout of this product is simple and ingenious, the appearance is neat and easy to clean, and it can shake its head 360 degrees to achieve three-dimensional air outlet, giving the user a sense of mysterious experience.

Description

Technical Field

[0001] The present invention relates to the field of fan technology, in particular to a columnar flow back-spray expansion flow bladeless air purification fan. Background Art

[0002] The invention patent with the authorization announcement date of CN 106122050B: Fan, which discloses a patented product of Dyson Technology Co., Ltd., includes the following fan components:

[0003] 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 the means for generating the air flow, the lower body section housing control circuitry for controlling the means for generating the air flow; and

[0004] a nozzle for receiving an air flow from the body and emitting the air flow;

[0005] wherein the lower body section includes an outer wall and an inner wall, the outer wall and the 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,

[0006] And wherein the lower body section includes means for rotating the upper body section relative to the lower body section.

[0007] The above patented products have already enjoyed a large market share. However, due to some defects in their structural design, they have limited the development of these fans towards more functions and easier use. Among them:

[0008] 1. The main body structure is complex: The main body consists of a lower and upper section, with an annular filter mounted in the upper section, as well as the core engine. The lower section houses all electrical components. The lower section also houses the mechanism for swinging the main body relative to the lower section, making the overall layout of the main body relatively complex. Furthermore, since each component requires a certain amount of space, the entire body cannot be made shorter or more compact.

[0009] Second, the layout of its filters reduces the amount of air entering the fan. Referring to the description in paragraph

[0125] of the specification, this filter has multiple layers, including an outer layer of a pleated high-efficiency particulate air (HEPA) filter, an inner layer of activated carbon cloth, and a perforated shield. The air inlet is one or more grilles or wire meshes installed in windows within the shield. Therefore, the incoming air is first reduced by the perforated shield, then reduced a second time by the outer layer of the pleated high-efficiency particulate air (HEPA) filter, and then a third time by the inner layer of activated carbon cloth, thereby limiting the amount of air entering. Furthermore, the long-term air intake of the perforated shield causes dust to accumulate on these grilles or wire meshes. This not only further reduces the amount of air entering, but also makes cleaning difficult.

[0010] Third, the fan's swing amplitude is limited. Although its lower body section includes a mechanism for rotating the upper body section relative to the lower body section, according to paragraph

[0123] of its specification, the range of each swing cycle of the main body section relative to the lower body section is preferably between 60° and 120°. Therefore, the swing amplitude of this fan is no different from that of a traditional fan. If the swing amplitude is too large, it may break the power supply wires. Therefore, it cannot swing 360° freely.

[0011] All of the above are technologies that need to be broken through by those skilled in the art, hence the present invention. Summary of the Invention

[0012] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a columnar flow back-spray expansion flow bladeless air purification fan, which has a simple and ingenious structural layout, a neat and easy-to-clean appearance, and can shake its head 360° to achieve three-dimensional air outlet, thereby overcoming the shortcomings of the prior art.

[0013] To achieve the above object, the present invention adopts the following technical solutions:

[0014] A column flow back jet expansion bladeless air purification fan includes a base and a column flow back jet expansion nozzle. The column flow back jet expansion nozzle is installed above the base and can rotate 360 ​​degrees relative to the base; the base includes a shell, a turbine core engine, and an air filter. The shell is hollow, the bottom of the shell is an air inlet, and the top is an air outlet. The turbine core engine is installed in the shell. The turbine core engine sucks air from the air inlet and blows it out from the air outlet. The bottom of the shell has a chassis with a filter installation cavity. The air filter is assembled in the filter installation cavity to isolate the air duct between the air inlet and the turbine core engine.

[0015] As a preferred solution, the chassis of the shell is a square base, and the air filter is a side drawer-type quick-replaceable structure. The air filter can be pushed and pulled to match the filter installation cavity of the chassis.

[0016] As a preferred solution, the air filter includes a pull-out box and a filter element. The pull-out box has four side panels and a bottom plate. The four side panels and the bottom plate enclose a filter element accommodating cavity. The air inlet is opened on one of the side panels, and a partition is arranged on the bottom plate along the air inlet direction to divide the air into uniform multiple channels. The filter element is carried on the partition.

[0017] As a preferred solution, the chassis of the shell is a round seat, and the air filter is a replaceable structure of a snap-on or threaded connection. The air filter is snapped or screwed onto the chassis from the bottom upward to form a match.

[0018] As a preferred solution, the bottom of the chassis has a bottom plate and supporting feet, and there is at least one air inlet, which is hidden between the filter element, the bottom plate and two adjacent supporting feet.

[0019] As a preferred solution, a 360-degree rotating shaking head mechanism is provided in the turbine core engine, including a rotating drive mechanism and a bearing. One end of the rotating drive mechanism is fixedly installed on the turbine core engine, and the other end of the drive mechanism is connected to the connection point in the center of the column back jet expansion nozzle. The bearing is installed above the shell, and the bottom of the column back jet expansion nozzle supports the bearing.

[0020] As a preferred solution, the rotary drive mechanism includes a motor, a driving member, a first rotating sleeve, an elastic reset member, and a second rotating sleeve, wherein the second rotating sleeve is connected to the column flow back jet expansion nozzle;

[0021] The motor is fixed in the turbine core engine, and the driving member is installed on the output shaft of the motor, and drives the driving member to rotate together with the motor when the motor is started; a first clutch mechanism is provided between the first rotating sleeve and the driving member, and the first rotating sleeve and the driving member are locked or separated by the first clutch mechanism. When the first rotating sleeve and the driving member are locked, the first rotating sleeve and the driving member rotate together, and when the first rotating sleeve and the driving member are separated, the driving member rotates idly;

[0022] The elastic return member abuts between the first rotating sleeve and the second rotating sleeve. A second clutch mechanism is provided between the first rotating sleeve and the second rotating sleeve. The first rotating sleeve and the second rotating sleeve are locked or separated by 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, thereby driving the column flow back jet expansion nozzle to rotate 360 ​​degrees. When the first rotating sleeve and the second rotating sleeve are separated, the first rotating sleeve idles.

[0023] As a preferred solution, the driving member has a disc, a first arc-shaped groove is provided on the upper surface of the disc, and a first boss is provided on the bottom of the first rotating sleeve. When the first boss falls into the first slot, the driving member and the first rotating sleeve are locked and can rotate together;

[0024] As a preferred solution, the outer surface of the boss of the first rotating sleeve is provided with a second groove, and the inner surface of the boss of the second rotating sleeve is provided with a second boss. When the second boss falls into the second groove, the first rotating sleeve and the second rotating sleeve are locked and can rotate together.

[0025] As a preferred embodiment, the columnar back-jet expansion nozzle is a columnar body, including a column with a height, which is divided into a front part and a rear part. The interior of the column is a ventilation cavity, and a back-jet port is provided at least at the rear of the column. The ventilation cavity and the back-jet port are connected through a circular arc flow channel, so that the wind ejected from the back-jet port blows from the back to the front along the outer wall of the column.

[0026] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0027] First, the product has a simple structure, and the layout of the components is novel and easy to install. Since the base consists of only three components: the housing, the turbine core, and the air filter, and the turbine core is made as a whole, it can be installed quickly. The air filter is installed below the turbine core, at the bottom of the housing close to the ground, so that the air inlet is hidden, making the fan neat and tidy. The air inlet is not visible from the outside, giving the user a mysterious experience. In addition, this simple structure and layout can also make the base shorter, saving space.

[0028] Second, the air filter is no longer in the traditional cylindrical barrel shape. The cover of the present invention is flat. First, this flat filter is easier to produce / purchase, thereby reducing costs. On the other hand, the flat air filter isolates the air duct between the air inlet and the turbine core engine. The air enters from the bottom and passes through the air filter and then goes straight to the turbine core engine, making the entire air duct relatively more direct and with fewer turns, thereby increasing the air intake.

[0029] Third, the fan's column-flow, back-spray, and expansion nozzles rotate 360 ​​degrees relative to the base, creating a three-dimensional airflow pattern. Compared to traditional bladeless fans that only produce air in a single angle or within a specific range, this 360-degree, three-dimensional airflow pattern offers a more novel experience.

[0030] Fourth, the nozzle of this product is a column flow back spray expansion nozzle. Compared with the traditional nozzle that can only spray in the forward direction, it has a larger air output, and the wind blown out is softer and more even. The back spray method gives people a sense of novelty and mystery. In addition to being able to cool down, consumers can also better explore "where the air comes in" and "where the air comes out" and enjoy the experience.

[0031] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic three-dimensional diagram of the assembly of a bladeless fan (square base heart-shaped) according to the first embodiment of the present invention.

[0033] Figure 2 yes Figure 1 Cross-sectional view of AA in the figure.

[0034] Figure 3 yes Figure 1 Schematic diagram of the fan with its column flow back jet expansion nozzle removed from the base.

[0035] Figure 4 yes Figure 3 Cross-sectional view of the BB.

[0036] Figure 5 yes Figure 3 Cross-sectional view of CC.

[0037] Figure 6 1 is a schematic diagram of a state where the drawer-type air filter of the first embodiment of the present invention is removed from the base.

[0038] Figure 7 It is a perspective view of a turbine core machine according to a first embodiment of the present invention.

[0039] Figure 8 It is an exploded view of the rotary drive mechanism of the first embodiment of the present invention.

[0040] Figure 9 It is a schematic diagram of the rotary drive mechanism and bearings of the first embodiment of the present invention.

[0041] Figure 10 It is a schematic diagram of the internal structure of the column flow back jet expansion nozzle of the first embodiment of the present invention.

[0042] Figure 11 It is a cross-sectional view of a column flow back jet expansion nozzle according to a first embodiment of the present invention.

[0043] Figure 12 yes Figure 11 There are partial enlarged pictures.

[0044] Figure 13 It is a schematic 3D diagram of the assembly of a bladeless fan (square base and perfect circle) according to the second embodiment of the present invention.

[0045] Figure 14 It is a schematic 3D diagram of the assembly of a bladeless fan (square base oblong ring) according to a third embodiment of the present invention.

[0046] Figure 15 It is a schematic 3D diagram of the assembly of a bladeless fan (round base oblong ring shape) according to a fourth embodiment of the present invention.

[0047] Figure 16 It is a schematic three-dimensional diagram of the assembly of a bladeless fan (round base heart shape) according to the fourth embodiment of the present invention.

[0048] Figure 17 It is a cross-sectional view of a bladeless fan (round base heart-shaped) according to a fourth embodiment of the present invention.

[0049] Description of the accompanying drawings:

[0050] 10. Base 11. Shell

[0051] 111. Air inlet 112. Air outlet

[0052] 113, chassis 114, filter installation cavity

[0053] 115. Air duct 116. Support legs

[0054] 12. Turbine core engine

[0055] 13. Air filter 14. Pull-out box

[0056] 141. Side panel 142. Bottom panel

[0057] 143. Filter element accommodating chamber 144. Partition

[0058] 15. Filter element 16. Rotation drive mechanism

[0059] 161, motor 162, drive

[0060] 163. First rotating sleeve 164. Elastic reset member

[0061] 165. Second rotating sleeve 166. First clutch mechanism

[0062] 1661, first slot 1662, first boss

[0063] 167, second clutch mechanism 1671, second slot

[0064] 1672, second boss 17, bearing

[0065] 20. Column flow back spray expansion nozzle 21. Column

[0066] 211, front 212, back

[0067] 213, ventilation cavity 214, back injection port

[0068] 2141, first back injection port 2142, second back injection port

[0069] 215. Circular arc flow channel 216. Positive injection nozzle. DETAILED DESCRIPTION

[0070] Please refer to Figures 1 to 12 As shown, it shows the specific structure of the first embodiment of the present invention, including a base 10 and a column flow back jet expansion nozzle 20. The column flow back jet expansion nozzle 20 is installed above the base 10 and can rotate 360 ​​degrees relative to the base 10, and the column flow back jet expansion nozzle 20 can be removed from the base 10 for easy storage.

[0071] The base 10 has a simple and compact structure and includes a housing 11, a turbine core 12, and an air filter 13. The housing 11 is hollow and sealed on all sides. The turbine core 12 and air filter 13 are both installed within the housing 11, with the air filter 13 located below the turbine core 12.

[0072] More specifically, Figure 4 and Figure 5 As shown. The shell 11 is hollow inside, and the bottom of the shell 11 is an air inlet 111, and the top is an air outlet 112. The turbine core engine 12 is installed in the shell 11. The turbine core engine 12 sucks air from the air inlet 111 and blows it out from the air outlet 112. After passing through the turbine core engine 12, a rapidly ejected airflow is formed. These airflows eventually rush toward the column flow back jet expansion nozzle 20, and the column flow back jet expansion nozzle 20 ejects the wind to form a three-dimensional air outlet state. In particular, there is a chassis 113 at the bottom of the shell 11, and a filter installation cavity 114 is provided in the chassis 113. The air filter 13 is assembled at the filter installation cavity 114 to isolate the air duct 115 between the air inlet 111 and the turbine core engine 12. This fan is different from the traditional side air intake. The air inlet 111 of this design is located at the bottom of the shell 11. The incoming air passes through the air filter 13 at the bottom and then blows out from the air outlet 112. Such a base 10 has the following advantages: First, the structure is simple. The base 10 consists of only three parts: the shell 11, the turbine core engine 12, and the air filter 13. It is easy to assemble. During assembly, you only need to assemble the turbine core engine 12 from the bottom to the top into the shell 11, and then insert the air filter 13 from the air inlet 111.

[0073] like Figure 6 As shown, in this embodiment, the chassis 113 of the housing 11 is a square base, and the air filter 13 is a side-mounted, quickly replaceable drawer-style structure. The air filter 13 can be pushed and pulled into the filter installation cavity 114 of the chassis 113. This structural design makes the air filter 13 more convenient to replace and clean. The connection between the air filter 13 and the housing 11 is screwless and can be easily pulled out, making it easy to use.

[0074] Combine Figures 4 to 6 As shown, 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. These four side panels 141 and the bottom panel 142 enclose a filter element accommodating chamber 143. The air inlet 111 is provided on one of the side panels 141. A partition 144 is provided on the bottom panel 142 along the air inlet direction to divide the incoming air into multiple, uniform channels. The filter element 15 is supported on the partition 144. This design ensures a more uniform air intake and fully utilizes the filtering function of each position of the filter element 15.

[0075] The columnar back-spray expansion nozzle 20 of this product can rotate 360 ​​degrees relative to the base 10, blowing air while rotating, thus creating a three-dimensional airflow fan. Compared with traditional designs that can only blow air in a single angle or within a certain range, this 360-degree three-dimensional airflow bladeless fan provides a more novel experience.

[0076] More specifically, combined Figure 2 、 Figures 7 to 9 As shown, a 360-degree rotating and shaking mechanism is provided in the turbine core 12, including a rotating drive mechanism 16 and a bearing 17. One end of the rotating drive mechanism is fixedly mounted on the turbine core 12, and the other end of the drive mechanism 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 receives the bearing 17. In this way, when the column-flow back-jet expansion nozzle 20 is assembled on the base 10 and the rotation function is started, the rotating drive mechanism 16 applies torque to the center connection point of the column-flow back-jet expansion nozzle 20. In addition, the outer periphery of the column-flow back-jet expansion nozzle 20 is directly connected to the bearing 17, so that the column-flow back-jet expansion nozzle 20 can rotate and shake 360 ​​degrees.

[0077] In this embodiment, the rotary 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. By engaging / disengaging these components, the motor 161 rotates and ultimately drives the column flow back jet expansion nozzle 20 to rotate. Moreover, no matter at what angle the column flow back jet expansion nozzle 20 is inserted and installed on the base 10, linkage can be achieved.

[0078] like Figure 4 and Figure 5 As shown, 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. When the motor 161 is started, the driving member 162 is driven to rotate together. There is a first clutch mechanism 166 between the first rotating sleeve 163 and the driving member 162. The first clutch mechanism 166 locks or separates the first rotating sleeve 163 and the driving member 162. 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. When the first rotating sleeve 163 is separated from the driving member 162, the driving member 162 idles. The specific structure of the first clutch mechanism 166 can be seen in FIG. Figure 8 As shown, the driving member 162 has a disc, and a first arc-shaped groove 1661 is set on the upper surface of the disc. A first boss 1662 is set at the bottom of the first rotating sleeve 163. 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.

[0079] The elastic return member 164 abuts between the first rotating sleeve 163 and the second rotating sleeve 165. In this embodiment, the elastic return member 164 is a spring that allows the second rotating sleeve 165 to float up and down. When the column-flow back-spray expansion nozzle 20 is assembled on the base 10, the second rotating sleeve 165 presses downward, compressing the spring and preparing for the locking of the first rotating sleeve 163 and the second rotating sleeve 165. When the column-flow back-spray expansion nozzle 20 is removed, the second rotating sleeve 165 springs upward, causing the motor 161 to drive the first rotating sleeve to idle. The details are as follows: A second clutch mechanism 167 is provided between the first rotating sleeve 163 and the second rotating sleeve 165. The second clutch mechanism 167 allows the first rotating sleeve 163 and the second rotating sleeve 165 to be locked or separated. When the first rotating sleeve 163 and the second rotating sleeve 165 are locked, the first rotating sleeve 163 and the second rotating sleeve 165 rotate together, thereby driving the column flow back jet expansion nozzle 20 to rotate 360 ​​degrees. When the first rotating sleeve 163 and the second rotating sleeve 165 are separated, the first rotating sleeve 163 rotates idly.

[0080] The structure of the second clutch mechanism 167 can be found in Figure 8As shown, the outer surface of the boss of the first rotating sleeve 163 is provided with a second groove 1671, and the inner surface of the boss of the second rotating sleeve 165 is provided with a second boss 1672. 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. It should be noted that the shape and structure of the first boss 1662, the first groove 1661, the second boss 1672, and the second groove 1671 are not limited to those shown in the drawings; the number of them can be one or more.

[0081] As well as Figures 10 to 12 As shown, the column flow back jet expansion nozzle 20 is a columnar body, including a column 21 with a height, and the column 21 is divided into a front 211 and a rear 212. The interior of the column 21 is a ventilation cavity 213, and a back jet port 214 is provided at least at the rear 212 of the column 21. The ventilation cavity 213 and the back jet port 214 are connected through a circular arc flow channel 215, so that the wind ejected from the back jet port 214 blows from the rear 212 to the front 211 along the outer wall of the column 21.

[0082] There are two back jet ports 214: a first back jet port 2141 and a second back jet port 2142, which are symmetrically positioned on the left and right rear sides of the rear face 212 of the column 21, respectively. Both the first back jet port 2141 and the second back jet port 2142 extend from the upper end to the lower end of the column 21. Furthermore, a front jet port 216 may be further provided on the front face 211 of the column 21. The front face 211 and the rear face 212 of the column 21 are separated by a dividing line X, which is drawn from the center point O of the column 21 to the left and right.

[0083] During operation, the strong wind blown out by the base 10 enters the ventilation cavity 213 from the bottom of the column 21 for the first pressure increase, then rushes from the ventilation cavity 213 to the pressure increase channel, and is pressure increased a second time in the gradually narrowing pressure increase channel, so that the high-speed flow of wind is ejected from the first back jet port 2141 and the second back jet port 2142, and blows from the back 212 to the front 211 along the outer wall of the column 21. As the wind blows through the back 212 of the outer wall of the column 21, it continuously sucks in external air, driving the external air to converge and then be discharged from the front 211 of the column 21, forming a three-dimensional wind outlet. Combined with the 360-degree rotating head mechanism, the column flow back jet expansion nozzle 20 can achieve 360-degree rotation of the three-dimensional wind outlet. When the front jet port 216 is opened at the same time, the high-speed flow of wind in the pressure increase channel is ejected from the front jet port 216 at the same time, strengthening the three-dimensional wind outlet.

[0084] like Figure 1As shown, from the appearance, the chassis 113 of the column flow back jet expansion flow bladeless air purification fan is a square seat, and its column flow back jet expansion flow nozzle 20 is heart-shaped. However, it can also be other styles. For example, the base 10 of this square seat can also be arbitrarily configured with a cylindrical column flow back jet expansion flow nozzle 20 (see Figure 13 ), or you can also configure the annular nozzle (see Figure 14 ).

[0085] Furthermore, if Figure 15 As shown, in another embodiment, the base 113 of the housing 11 is a round seat, and the air filter 13 is a replaceable structure of a snap-on or threaded connection. The air filter 13 is snapped or screwed onto the base 113 from the bottom upward to form a match. In addition, this base with a round base 113 can still be freely connected with each cylindrical column back-spray expansion nozzle 20 (see Figure 16 ), heart-shaped column flow back spray expansion nozzle 20, annular nozzle matching installation and use. Figure 16 and Figure 17 As shown, the bottom of the chassis 113 has a bottom plate 142 and support legs 116, and there is at least one air inlet 111, which is hidden between the filter element 15, the bottom plate 142 and the two adjacent support legs 116. In this way, from the overall perspective, both the air inlet 111 and the air outlet have hidden characteristics, which adds a sense of mystery to the user.

[0086] The working principle and usage process of the product of the present invention are as follows:

[0087] See also Figure 4 As shown, air enters from the air inlet 111 at the bottom of the base 10, is filtered by the air filter 13, is drawn into the turbine core 12, and is sprayed into the column flow back jet expansion nozzle 20 through the air outlet 112 at the top of the base 10. The air is pressurized by the column flow back jet expansion nozzle 20 to form a rapid airflow, and is sprayed out from the back jet port 214 and / or the front jet port 216 to form the outlet air. When the shaking function is activated, the base 10 does not move, and the entire column flow back jet expansion nozzle 20 can rotate 360 ​​degrees relative to the base 10 to form a three-dimensional 360-degree air outlet effect, which solves the problem that the current general fan can only shake within a small angle range.

[0088] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Column flow back spray expansion bladeless air purifier fan, characterized by: The invention 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), the top is an air outlet (112), and the turbine core (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) has a base plate (113), and the base plate (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 (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, characterized in that: The chassis (113) of the housing (11) is a square seat, and the air filter (13) is a side-drawer-type quick-replaceable structure. 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, characterized in that: The chassis (113) of the housing (11) is a round seat, and the air filter (13) is a replaceable structure that is snap-fit ​​or threaded. The air filter (13) is snap-fitted or screwed onto the chassis (113) from the bottom upwards 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 legs (116), and the air inlet (111) has at least one, which is hidden between the filter element (15), the bottom plate (142) and two adjacent supporting legs (116).

5. The column flow back-spray expansion bladeless air purifier fan according to claim 1, characterized in that: The turbine core engine (12) is provided with a 360-degree rotating shaking mechanism, including 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-spray expansion bladeless air purifier fan according to claim 5, characterized in that: The rotary 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) is abutted 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 purifier fan according to claim 6, characterized in that: The driving member (162) has a circular disc, and a first arc-shaped groove (1661) is provided on the upper surface of the circular disc. A first boss (1662) is provided at the bottom of the first rotating sleeve (163). The first groove (1661) and the first boss (1662) constitute a first clutch mechanism (166). 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: A second groove (1671) is provided on the outer surface of the boss of the first rotating sleeve (163), and a second boss (1672) is provided on the inner surface of the boss of the second rotating sleeve (165). The second groove (1671) and the second boss (1672) form a second clutch mechanism (167). 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.

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