CN208579498U - Swinging impeller structure and air duct assembly with it - Google Patents

Abstract

The utility model discloses a kind of swinging impeller structure and there is its air duct assembly, the swinging impeller structure is used to control the connection between air port and interior air duct, outer air duct, the outer air duct covers the outside in the interior air duct, the swinging impeller structure includes: multiple pendulum leaves, multiple pendulum leaf joints are arranged around central axes, each pendulum Ye Junke is swung between open configuration and closed state, and the inclination angle of each pendulum leaf relatively described central axes in open configuration is greater than the inclination angle of the relatively described central axes in closed state；Driving mechanism, the driving mechanism are connected with multiple pendulum leaves respectively, are swung with respectively driving the pendulum leaf.According to the swinging impeller structure of the utility model embodiment, since the swing of pendulum leaf can be realized, the air port air duct Jin Yunei is connected to or air port is only connected to outer air duct, so that swinging impeller structure can be realized interior air duct outlet air and two kinds of outlet air/air inlet mode switchings of outer air duct outlet air, thus the user demand better meet.

Description

Swinging impeller structure and air duct assembly with it

Technical field

The utility model relates to air cleaning facility field, more particularly, to a kind of swinging impeller structure and with its air duct it is total At.

Background technique

Existing clarifier has a single function, and can only realize purification function, and winter uses clarifier, and cold wind blows uncomfortable.Disappear Expense person wishes clarifier band fan, heating function, can use throughout the year.Existing technical solution is directly in air outlet Position increases fixed heater, but increased heater windage is larger, influences outlet air, and then influence fan effect.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model One purpose is that proposition swinging impeller structure, the swinging impeller structure can switch the cold air duct and hot-flow flue of purification, and improving user makes Use satisfaction.

Another purpose of the utility model is to propose a kind of air duct assembly with the swinging impeller structure.

According to the swinging impeller structure of the utility model embodiment, the swinging impeller structure is for controlling air port and interior air duct, exogenous wind Connection between road, the outer air duct cover the outside in the interior air duct, and the swinging impeller structure includes: multiple pendulum leaves, Duo Gesuo It states pendulum leaf joint to be arranged around central axes, each pendulum Ye Junke is swung between open configuration and closed state, each pendulum The inclination angle of leaf relatively described central axes in open configuration is greater than the inclination angle of the relatively described central axes in closed state；Driving machine Structure, the driving mechanism are connected with multiple pendulum leaves, to drive the pendulum leaf to swing.

According to the swinging impeller structure of the utility model embodiment, connect since the swing of pendulum leaf can be realized the air port air duct Jin Yunei Logical or air port only be connected to outer air duct so that swinging impeller structure can be realized interior air duct outlet air and two kinds of outlet air of outer air duct outlet air/ The switching of air inlet mode, thus the user demand better meet.

In some embodiments, each pendulum leaf all has fixing axle and shifting axle, the driving mechanism and the shifting Moving axis is connected, and when the driving mechanism drives the shifting axle mobile, the pendulum leaf is rotated around the fixing axle.

In some specific embodiments, the swinging impeller structure further includes fixed ring, and the Fixing shrink ring is in the drive The fixing axle in the outside of motivation structure, each pendulum leaf is located in the fixed ring.

In some more specific embodiments, being located between the two neighboring fixing axle for the fixed ring is equipped with axis To convex edge, it is described axial direction convex edge towards the air port direction protrude, the two neighboring pendulum leaf in closed state respectively with The two sides linking of the axial direction convex edge, multiple axial convex edges and multiple pendulum leaves are connected to form smooth tubulose.

In some embodiments, being located between the two neighboring fixing axle for the fixed ring is equipped with radial convex edge, The radial convex along the direction protrusion for being directed away from the central axes, the two neighboring pendulum leaf in open configuration respectively with institute State the two sides linking on radial convex edge.

In some embodiments, the driving mechanism includes: driving motor；Drive gear, the driving gear with it is described The motor shaft of driving motor is connected；Drive rack, one end of the drive rack and driving gear engaged transmission, the drive The other end of carry-over bar is connected with the pendulum leaf.,

In some alternative embodiments, the drive rack be it is multiple, multiple drive racks correspondingly with Multiple pendulum leaves are connected, and multiple drive racks are arranged in pairs, and same pair of two drive racks are in the sliding tooth Be centrosymmetric distribution on wheel, and the different pairs of drive rack axially offsets arrangement along the driving gear.

In some alternative embodiments, the driving mechanism includes driving shell, the driving motor and the sliding tooth Wheel is supported in the driving shell, Telescopic path is limited in the driving shell, the drive rack cooperation is described flexible logical In road, one end of the drive rack is meshed with the internal driving gear and the other end stretches out.

In some alternative embodiments, the opposed inner walls of the Telescopic path are equipped with sliding slot, in the drive rack Sliding block equipped with cooperation in the sliding slot.

According to the air duct assembly of the utility model embodiment, comprising: outer tube；Inner tube, the inner pipe sleeve is described In outer tube, the peripheral wall of the inner tube is equipped with internal orifice, and the inner cavity of the inner tube constitutes interior air duct, the inner tube and institute It states and constitutes outer air duct between outer tube；Swinging impeller structure, the swinging impeller structure are previously described swinging impeller structure, the multiple pendulum leaf In closed state cooperation on the internal orifice to encapsulate the interior air duct, the multiple pendulum leaf in open configuration respectively with institute Outer tube is stated to be connected with the inner tube to encapsulate the outer air duct.

The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will Become obvious and be readily appreciated that, in which:

Fig. 1 is that the pendulum leaf of the utility model embodiment is in the structural schematic diagram of closed state.

Fig. 2 is that the pendulum leaf of the utility model embodiment is in the structural schematic diagram of open configuration.

Fig. 3 is the overall structure diagram of the swinging impeller structure of the utility model embodiment.

Fig. 4 is the overall structure diagram of the driving structure of the utility model embodiment.

Fig. 5 is the local structural graph of the driving structure of the utility model embodiment.

Fig. 6 is the structural schematic diagram of the air duct assembly of utility model embodiment.

Appended drawing reference:

Air duct assembly 1,

Swinging impeller structure 100,

Pendulum leaf 10,

Fixing axle 101, shifting axle 102,

Driving mechanism 20,

Driving motor 201, driving gear 202, drive rack 203, sliding block 2031, driving shell 204,

Telescopic path 2041, sliding slot 2042,

Fixed ring 30,

Radial convex along 301, axial convex edge 302,

Outer tube 200, outer air duct 210,

Inner tube 300, interior air duct 310,

Air port 40.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.The meaning of " plurality " is two or more in the description of the present invention,.

Below with reference to Fig. 1-Fig. 6 description according to the specific structure of the swinging impeller structure 100 of the utility model embodiment.

As shown in figs 1 to 6, according to the swinging impeller structure of the utility model embodiment 100 for controlling air port 40 and interior air duct 310, the connection between outer air duct 210,210 sets of the outer air duct outsides in interior air duct 310, swinging impeller structure 100 include multiple pendulum leaves 10 and driving mechanism 20, multiple pendulum leaves 10 are arranged around central axes, each pendulum leaf 10 can open configuration and closed state it Between swing, each pendulum leaf 10, which is greater than the inclination angles of central axes in open configuration phase, inclines to central axes in closed state phase Angle, driving mechanism 20 are connected with multiple pendulum leaves 10, are swung with driving pendulum leaf 10.

It is understood that each pendulum leaf 10 has open configuration and closed state, and in open configuration phase to axis The inclination angle of line is greater than in closed state phase to the inclination angle of central axes.Since outer air duct 210 is set in the outside in interior air duct 310, So when pendulum leaf 10 is opposite larger with the inclination angle of central axes, pendulum leaf 10 can be only against on the internal perisporium of outer air duct 210, thus So that outer air duct 210 and air port 40 separate.And when the inclination angle for putting the opposite central axes of leaf 10 is smaller, pendulum leaf 10 can only be against interior On the peripheral wall in air duct 310, so that interior air duct 310 and air port 40 separate, that is to say, that the pendulum leaf of the utility model embodiment Structure 100 by adjusting pendulum leaf 10 position can be realized air port 40 be only connected to interior air duct 310 or air port 40 only with exogenous wind Road 210 is connected to.Therefore, the swinging impeller structure of the utility model embodiment 100 is placed and is set with air purifier or other ventilations When standby middle, interior air duct 310 may be implemented and go out hot wind, outer air duct 210 cold wind out, avoid influence of the heater to cold wind.

What needs to be explained here is that multiple pendulum leaves 10 can only be driven by a driving mechanism 20, there can also be multiple drives Motivation structure 20 respectively drives.

According to the swinging impeller structure 100 of the utility model embodiment, due to the swing of pendulum leaf 10 can be realized air port 40 only with The interior connection of air duct 310 or air port 40 are only connected to outer air duct 210, so that swinging impeller structure 100 can be realized interior 310 outlet air of air duct With 210 outlet air of outer air duct, two kinds of outlet air/air inlet mode switchings, thus the user demand better meet.

Certainly, herein it should be noted that opening shape when pendulum leaf 10 is in some embodiments of the utility model When state, pendulum leaf 10 can separate interior air duct 310.And when putting leaf 10 in the closure state, pendulum leaf 10 can separate outer air duct 210.Separate principle to it is described previously similar, this will not be repeated here.In addition, for the convenience of description, being hereinafter in putting leaf 10 Open configuration separates outer air duct 210, and puts leaf 10 and be in closed state partition for air duct 310, carries out to swinging impeller structure 100 It specifically describes.

In some embodiments, as shown in Figure 1, Figure 3, each pendulum leaf 10 all has fixing axle 101 and shifting axle 102, drives Motivation structure 20 is connected with shifting axle 102, when driving mechanism 20 drives shifting axle 102 mobile, puts leaf 10 around 101 turns of fixing axle It is dynamic.It is understood that pendulum leaf 10 is connected by shifting axle 102 with driving mechanism 20, driving mechanism is realized relatively stablely The movement of 20 driving pendulum leaves 10 enables pendulum leaf 10 preferably to realize that it blocks interior air duct 310 or blocks outer air duct 210 Movement.In addition, can be avoided rigid connection bring using this connection type with certain rotational freedom of shifting axle 102 The influence of tensile stress pair and pendulum leaf 10 and driving structure.Certainly, in the other embodiments of the utility model, pendulum leaf 10 can be straight The structures such as screw, rivet were connected to be connected in driving mechanism 20.

In some specific embodiments, as shown in Fig. 2-Fig. 3, swinging impeller structure 100 further includes fixed ring 30, fixed ring 30 It covers in the outside of driving mechanism 20, the fixing axle 101 of each pendulum leaf 10 is located in fixed ring 30.It is understood that all solid Dead axle 101 is each provided in fixed ring 30 blade edge that can guarantee to put leaf 10 in pendulum 10 rotation process of leaf always in same In ring week, thus, it is possible to guarantee that interior air duct 310 or outer air duct 210 can preferably be blocked by putting leaf 10.

In some more specific embodiments, as shown in Fig. 2-Fig. 3, fixed ring 30 is located at two neighboring fixing axle 101 Between be equipped with axial convex edge 302, the direction in axial convex edge 302 towards air port 40 is protruded, and two neighboring pendulum leaf 10 is in closed form It is connected respectively with the two sides of axial convex edge 302 when state, multiple axial direction convex edges 302 and the linking of multiple pendulum leaves 10 form smooth pipe Shape.It is understood that axial convex edge 302 is connected to form smooth tubulose with pendulum leaf 10, be on the one hand conducive to block interior air duct 310, it avoids under 210 outlet air of outer air duct/air intake mode, the phenomenon that interior air duct 310 is leaked out.On the other hand pendulum can be reduced Influence of the leaf 10 to 210 air-flow of outer air duct.It needs exist for, it is emphasized that fixed ring 30 need to be connected into smooth pipe with pendulum leaf 10 Shape, therefore the concrete shape of fixed ring 30 need to be determined by the contour line of pendulum leaf 10, herein not to the concrete shape of axial convex edge 302 Make restriction.

In some embodiments, as shown in Fig. 2-Fig. 3, being located between two neighboring fixing axle 101 for fixed ring 30 is set There is radial convex along 301, the direction that radial convex is directed away from central axes along 301 is protruded, and two neighboring pendulum leaf 10 is in open configuration It is connected respectively with radial convex along 301 two sides.It is understood that be connected can be preferable with pendulum 10 two sides of leaf along 301 for radial convex Realize that pendulum leaf 10 blocks the function of outer air duct 210 under open configuration in ground.Certainly, radial convex also needs to put along 301 shape The contour line of leaf 10 determines, does not make restriction to the shape of radial convex edge 301 herein.

In some embodiments, as shown in fig. 4-5, driving mechanism 20 includes driving motor 201, driving 202 and of gear Drive rack 203, driving gear 202 are connected with the motor shaft of driving motor 201, one end of drive rack 203 and driving gear The other end of 202 engaged transmissions, drive rack 203 is connected with pendulum leaf 10.It is understood that gear & rack structure can will be electric The rotary motion of machine is transformed into the linear motion of drive rack 203, to preferably realize driving mechanism 20 to swinging impeller structure 100 Driving.Certainly, in the embodiments of the present invention, driving mechanism 20 can also include linear motor, the electricity of linear motor Arbor is directly connected with pendulum leaf 10, alternatively, driving mechanism 20 includes driving worm gear and drives worm screw in the embodiment having, this Sample can equally complete the driving to pendulum leaf 10.

In some alternative embodiments, as shown in fig. 4-5, drive rack 203 is multiple, multiple drive racks 203 It is connected correspondingly with multiple pendulum leaves 10, multiple drive racks 203 are arranged in pairs, and same pair of two drive racks 203 are being driven Be centrosymmetric distribution on moving gear 202, and different pairs of drive rack 203 axially offsets arrangement along driving gear 202.

The distribution it is understood that same pair of two drive racks 203 are centrosymmetric on driving gear 202, can So that coupled connected pendulum leaf 10 is also to occur in pairs, so that pendulum leaf 10 can preferably realize air duct in partition 310 or separate outer air duct 210 function.Furthermore different pairs of drive rack 203 axially offsets arrangement along driving gear 202 The movement of two pairs of drive racks 203 can be made not interfere with each other, reduce the space occupied of driving mechanism 20 to a certain extent, To reduce the size of swinging impeller structure 100, the production cost of swinging impeller structure 100 is reduced.

In some alternative embodiments, as shown in fig. 4-5, driving mechanism 20 includes driving shell 204, driving motor 201 are supported in driving shell 204 with driving gear 202, Telescopic path 2041 are limited in driving shell 204, drive rack 203 is matched It closes in Telescopic path 2041, one end of drive rack 203 is meshed with internal driving gear 202 and the other end stretches out.By This, driving shell 204 can guarantee that drive rack 203 will not shift during the motion, so as to avoid drive rack 203 Stuck phenomenon occurs.

In some alternative embodiments, as shown in fig. 4-5, the opposed inner walls of Telescopic path 2041 are equipped with sliding slot 2042, drive rack 203 is equipped with sliding block 2031 of the cooperation in sliding slot 2042.It is understood that sliding slot 2042 can be right Sliding block 2031 plays restriction effect, to be further ensured that the robust motion of drive rack 203, drive rack 203 is avoided to block Dead phenomenon occurs.Certainly, in the other embodiments of the utility model, sliding slot 2042 can be located in drive rack 203, sliding Block 2031 can be located in Telescopic path 2041.Certainly, the structure for limiting drive rack 203 can also have other modes, herein It does not illustrate.

The swinging impeller structure 100 of one specific embodiment of the utility model is described below with reference to Fig. 1-Fig. 5.

As shown in Figure 1, the swinging impeller structure 100 of the present embodiment for control air port 40 and interior air duct 310, outer air duct 210 it Between connection, 210 sets of the outer air duct outsides in interior air duct 310, swinging impeller structure 100 include four pendulum leaves 10,20 and of driving mechanism Fixed ring 30, four pendulum leaves 10 are arranged around central axes, and each pendulum leaf 10 can be swung between open configuration and closed state, Each pendulum leaf 10 is greater than in closed state phase at inclination angle of the open configuration phase to central axes to the inclination angle of central axes, driving machine Structure 20 is connected with multiple pendulum leaves 10 respectively, is swung with respectively driving pendulum leaf 10.

Each pendulum leaf 10 all has fixing axle 101 and shifting axle 102, and driving mechanism 20 is connected with shifting axle 102, is driving When mechanism 20 drives shifting axle 102 mobile, pendulum leaf 10 is rotated around fixing axle 101.30 sets of the fixed ring outsides in driving mechanism 20, The fixing axle 101 of each pendulum leaf 10 is located in fixed ring 30.Being located between two neighboring fixing axle 101 for fixed ring 30 is equipped with Axial convex edge 302, axial convex edge 302 towards air port 40 direction protrude, two neighboring pendulum leaf 10 in closed state respectively with The two sides of axial convex edge 302 are connected, and four axial convex edges 302 and four pendulum leaf 10 linkings form smooth tubulose.Fixed ring 30 Be located between two neighboring fixing axle 101 and be equipped with radial convex along 301, the direction that radial convex is directed away from central axes along 301 Protrusion, two neighboring pendulum leaf 10 are connected with radial convex along 301 two sides respectively in open configuration.

Driving mechanism 20 includes driving shell 204, driving motor 201, driving gear 202 and drive rack 203, drives gear 202 are connected with the motor shaft of driving motor 201,202 engaged transmission of one end and driving gear of drive rack 203, drive rack 203 other end is connected with the fixing axle 101 of pendulum leaf 10.Drive rack 203 is four, and four drive racks 203 correspond Ground is connected with four pendulum leaves 10, and four drive racks 203 are arranged in pairs, and same pair of two drive racks 203 are in driving gear 202 On be centrosymmetric distribution, different pairs of drive rack 203 axially offsets arrangement along driving gear 202.201 He of driving motor Driving gear 202 is supported in driving shell 204, and Telescopic path 2041 is limited in driving shell 204, and the cooperation of drive rack 203 exists In Telescopic path 2041, one end of drive rack 203 is meshed with internal driving gear 202 and the other end stretches out.It is flexible logical The opposed inner walls in road 2041 are equipped with sliding slot 2042, and drive rack 203 is equipped with sliding block 2031 of the cooperation in sliding slot 2042.

The swinging impeller structure 100 of the present embodiment is only connected to interior air duct 310 since the swing of pendulum leaf 10 can be realized air port 40 Or air port 40 is only connected to outer air duct 210, so that swinging impeller structure 100 can be realized interior 310 outlet air of air duct and go out with outer air duct 210 Two kinds of outlet air/air inlet mode switchings of wind, thus the user demand better meet.

As shown in fig. 6, according to the air duct assembly 1 of the utility model embodiment, including outer tube 200, inner tube 300 and pendulum Impeller structure 100,300 sets of inner tube in outer tube 200, the peripheral wall of inner tube 300 is equipped with internal orifice, the inner cavity of inner tube 300 Air duct 310 in constituting, constitutes outer air duct 210 between inner tube 300 and outer tube 200, swinging impeller structure 100 is pendulum leaf knot above Structure 100, multiple pendulum leaves 10 cooperate in closed state to encapsulate interior air duct 310 on internal orifice, and multiple pendulum leaves 10 are in open configuration When be connected with outer tube 200 and inner tube 300 respectively to encapsulate outer air duct 210.

It is understood that multiple pendulum leaves 10 cooperate on internal orifice in closed state to encapsulate interior air duct 310, multiple pendulum Leaf 10 is connected with outer tube 200 and inner tube 300 respectively in open configuration to encapsulate outer air duct 210.Pendulum leaf 10 can be with as a result, It realizes that air port 40 is only connected to interior air duct 310 or air port 40 is only connected to outer air duct 210, therefore, the utility model is implemented When 1 structure of air duct assembly of example is placed with air purifier or other air regenerating devices, may be implemented interior air duct 310 go out hot wind, Outer air duct 210 goes out cold wind, avoids influence of the heater to cold wind.

According to the air duct assembly 1 of the utility model embodiment, due to previously described swinging impeller structure 100, Interior 310 outlet air of air duct and 210 outlet air of outer air duct, two kinds of outlet air/air inlet mode switchings are realized, thus the use better meet Family demand.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot Structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned art The schematic representation of language may not refer to the same embodiment or example.Moreover, description specific features, structure, material or Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.

While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that: These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective And modification, the scope of the utility model are defined by the claims and their equivalents.

Claims (10)

1. a kind of swinging impeller structure, which is characterized in that the swinging impeller structure is used to control the company between air port and interior air duct, outer air duct Logical, the outer air duct covers the outside in the interior air duct, and the swinging impeller structure includes:

Multiple pendulum leaves, multiple pendulum leaf joints are arranged around central axes, and each pendulum Ye Junke is in open configuration and closed state Between swing, the inclination angle of each pendulum leaf relatively described central axes in open configuration is greater than relatively described in closed state The inclination angle of central axes；

Driving mechanism, the driving mechanism are connected with multiple pendulum leaves, to drive multiple pendulum leaves to swing.

2. swinging impeller structure according to claim 1, which is characterized in that each pendulum leaf all has fixing axle and movement Axis, the driving mechanism are connected with the shifting axle, when the driving mechanism drives the shifting axle mobile, the pendulum leaf around The fixing axle rotation.

3. swinging impeller structure according to claim 2, which is characterized in that further include fixed ring, the Fixing shrink ring is described The fixing axle in the outside of driving mechanism, each pendulum leaf is located in the fixed ring.

4. swinging impeller structure according to claim 3, which is characterized in that the fixed ring is located at the two neighboring fixation Axial convex edge is equipped between axis, the direction in the axial direction convex edge towards the air port is protruded, and the two neighboring pendulum leaf is closing Be connected respectively with the two sides of the axial convex edge when conjunction state, multiple axial direction convex edges and multiple pendulum leaves be connected to be formed it is flat Whole tubulose.

5. swinging impeller structure according to claim 3, which is characterized in that the fixed ring is located at the two neighboring fixation Radial convex edge is equipped between axis, the radial convex is along the direction protrusion for being directed away from the central axes, the two neighboring pendulum Leaf is connected with the two sides on the radial convex edge respectively in open configuration.

6. swinging impeller structure according to claim 1, which is characterized in that the driving mechanism includes:

Driving motor；

Gear is driven, the driving gear is connected with the motor shaft of the driving motor；

Drive rack, one end of the drive rack and driving gear engaged transmission, the other end of the drive rack and The pendulum leaf is connected.

7. swinging impeller structure according to claim 6, which is characterized in that the drive rack is multiple, multiple drivings Rack gear is connected with multiple pendulum leaves correspondingly, and multiple drive racks are arranged in pairs, same pair of two drivings Rack gear is centrosymmetric distribution on the driving gear, and the different pairs of drive rack is axial wrong along the driving gear Begin to rehearse cloth.

8. swinging impeller structure according to claim 6, which is characterized in that the driving mechanism includes driving shell, the driving Motor and the driving gear are supported in the driving shell, and Telescopic path, the drive rack are limited in the driving shell Cooperation is in the Telescopic path, and one end of the drive rack is meshed with the internal driving gear and the other end is stretched Out.

9. swinging impeller structure according to claim 8, which is characterized in that the opposed inner walls of the Telescopic path, which are equipped with, to be slided Slot, the drive rack are equipped with sliding block of the cooperation in the sliding slot.

10. a kind of air duct assembly characterized by comprising

Outer tube；

Inner tube, the inner pipe sleeve is in the outer tube, and the peripheral wall of the inner tube is equipped with internal orifice, the inner tube Inner cavity constitutes interior air duct, constitutes outer air duct between the inner tube and the outer tube；

Swinging impeller structure, the swinging impeller structure are according to swinging impeller structure of any of claims 1-9, the multiple pendulum leaf In closed state cooperation on the internal orifice to encapsulate the interior air duct, the multiple pendulum leaf in open configuration respectively with institute Outer tube is stated to be connected with the inner tube to encapsulate the outer air duct.