CN210267661U

CN210267661U - Air duct assembly and air purifier

Info

Publication number: CN210267661U
Application number: CN201920886287.0U
Authority: CN
Inventors: 游卫刚; 贾铌; 万博臣; 丁泺火
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-04-07
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a wind channel subassembly and air purifier, this wind channel subassembly includes: the first air guide piece comprises a first air guide duct; and the second air guide piece comprises a second air guide air channel, the air outlet of the second air guide air channel is communicated with the air inlet of the first air guide air channel, and the area of the cross section of the second air guide air channel is gradually reduced along the direction from the air inlet of the second air guide air channel to the air outlet of the second air guide air channel. This wind channel subassembly and air purifier can collect the air current with the air inlet end of impeller, and has reduced the flow loss of air current, has promoted the amount of wind.

Description

Air duct assembly and air purifier

Technical Field

The utility model relates to an air purification equipment technical field especially relates to a wind channel subassembly and air purifier.

Background

Along with economic quick development, haze pollution is also more and more serious simultaneously, and the air treatment difficult problem is difficult to solve for a moment, and along with the improvement of standard of living, people also are more and more high to healthy attention degree in addition, therefore the demand of consumer to air purifier turns into the rigidity demand gradually.

When the traditional air purifier is used, airflow at the impeller is discontinuous, and the air quantity discharged by the air purifier is low, so that the use is influenced.

SUMMERY OF THE UTILITY MODEL

Based on this, to the problem that when traditional air purifier was used, buzzing and the sound of whistling produced easily, the noise figure was higher, influences the user and uses, provide an air duct subassembly and air purifier, this air duct subassembly and air purifier can collect the air current with the air inlet end of impeller, and reduced the flow loss of air current, promoted the amount of wind.

The specific technical scheme is as follows:

in one aspect, the present application relates to an air duct assembly comprising: the first air guide piece comprises a first air guide duct; and the second air guide piece comprises a second air guide air channel, the air outlet of the second air guide air channel is communicated with the air inlet of the first air guide air channel, and the area of the cross section of the second air guide air channel is gradually reduced along the direction from the air inlet of the second air guide air channel to the air outlet of the second air guide air channel.

When the air duct assembly is used, air flows to the first air guide duct along the second air guide duct, the air inlet of the second air guide duct is gradually reduced in the direction of the air outlet of the second air guide duct due to the fact that the area of the cross section of the second air guide duct is along, and then when air flows in the second air guide duct, the air flows can be uniformly accelerated, meanwhile, the air flows can be guided into the first air guide duct after being collected in a centralized mode, air inlet efficiency is improved, flowing loss of the air flows is low, and therefore the air quantity is improved.

The technical solution is further explained below:

in one embodiment, an avoiding portion protruding toward the radial direction of the first air guide duct is arranged on the inner wall of the first air guide duct.

In another aspect, the present application further relates to an air purifier including the air duct assembly in any of the above embodiments.

Above-mentioned air purifier is when using, and the air current flows along second wind-guiding wind channel flow direction first wind-guiding wind channel, because the area in the cross section in second wind-guiding wind channel is followed the air intake in second wind-guiding wind channel extremely the direction of the air outlet in second wind-guiding wind channel reduces gradually, and then, when wind flows in second wind-guiding wind channel, the air current can evenly accelerate, can concentrate the air current and collect the back and lead to first wind-guiding wind channel simultaneously, promotes air inlet efficiency, and the flow loss of air current is lower, and then has promoted the amount of wind.

The technical solution is further explained below:

in one embodiment, the air purifier further comprises an impeller, and the impeller is arranged in the first air guide duct.

In one embodiment, the impeller includes a first guide member, the first guide member includes a third air guiding duct, an air inlet of the third air guiding duct communicates with an air outlet of the second air guiding duct, and a guide structure is disposed on an inner wall of the third air guiding duct, and the guide structure is configured to guide an air flow to the air outlet of the third air guiding duct along the air inlet of the third air guiding duct.

In one embodiment, the first guide member includes a first air inlet end and a first air outlet end, and the first air inlet end and the first air outlet end are communicated to form a third air guide duct.

In one embodiment, an angle between a tangent of the end part of the first air outlet end and the radial direction of the third air guide duct is a, wherein a is more than or equal to 90 degrees and less than or equal to 120 degrees.

In one embodiment, the impeller includes a second guide member, the second guide member is spaced from the first guide member, the second guide member is disposed between the first guide member and the air outlet of the first air guide duct, and the area of the cross section of the second guide member gradually increases along a direction from the air inlet of the first air guide duct to the air outlet of the first air guide duct.

In one embodiment, the impeller further includes a blade, one end of the blade is fixedly disposed on an inner wall of the third air guiding duct, and the other end of the blade is connected to one end of the second guiding member.

In one embodiment, the other end of the second guide member is a second air outlet end, and the cross-sectional area of the first air outlet end is larger than that of the second air outlet end.

In one embodiment, the guide structure includes a first guide portion protruding inward and a second guide portion recessed outward, the first guide portion is connected to the second guide portion, the first guide portion is close to the first air inlet end, and the second guide portion is close to the first air outlet end.

In one embodiment, the air purifier further includes a flow guide structure, the flow guide structure is disposed in the first wind guide channel, the flow guide structure is spaced from the impeller, and the flow guide structure is disposed between the air outlet of the first wind guide channel and the impeller and is configured to guide the airflow toward the air outlet of the first wind guide channel.

In one embodiment, the air guide structure includes a third guide member, the third guide member includes a third guide portion, and an area of a cross section of the third guide portion gradually decreases along a direction from the air inlet of the first air guide duct to the air outlet of the first air guide duct.

In one embodiment, the flow guide structure includes a fourth guide member, the fourth guide member is fixedly disposed on an outer wall of the third guide member, and the fourth guide member includes a flow guide inclined surface, and the flow guide inclined surface is disposed toward the air outlet of the first air guide duct and is configured to guide the airflow along the direction of the air outlet of the first air guide duct.

In one embodiment, the diversion inclined plane is an arc-shaped surface which is concave inwards.

In one embodiment, the fourth guide member includes a second air inlet end and a third air outlet end, the diversion inclined plane is disposed between the second air inlet end and the third air outlet end, and the thickness of the fourth guide member gradually decreases along a direction from the second air inlet end to the third air outlet end.

In one embodiment, an angle between a tangent of the end part of the third air outlet end and the radial direction of the first air guide duct is β, wherein the angle is 85 degrees or more and less than β degrees or less and 110 degrees or less.

In one embodiment, an angle between a tangent line of the end part of the second air inlet end and the radial direction of the first air guide duct is gamma, wherein gamma is more than or equal to 25 degrees and less than or equal to 45 degrees.

In one embodiment, the distance between the impeller and the flow guide structure is H, wherein H is more than or equal to 5mm and less than or equal to 15 mm.

In one embodiment, the distance between the impeller and the inner wall of the first air guide duct is L, wherein L is more than or equal to 4mm and less than or equal to 7 mm.

In one embodiment, the air purifier further comprises an air outlet grille, and the air outlet grille is arranged at an air outlet of the first air guide duct.

In one embodiment, the air purifier further comprises a filter element, and the filter element is arranged at the air inlet of the second air guide duct.

Drawings

FIG. 1 is a schematic view of the internal structure of an air purifier;

FIG. 2 is a schematic structural view of an impeller;

fig. 3 is an assembly schematic view of an air outlet grille and a flow guide structure;

FIG. 4 is a schematic structural view of a fourth guide member;

FIG. 5 is an enlarged view of a portion of FIG. 1;

FIG. 6 is a schematic structural view of an impeller in another embodiment;

FIG. 7 is a cross-sectional view of the impeller of FIG. 6;

fig. 8 is a top view of the impeller of fig. 6.

Description of reference numerals:

10. an air purifier, 100, a first wind guide, 110, a first wind guide channel, 120, an avoiding part, 200, a second wind guide, 210, a second wind guide channel, 300, an impeller, 310, a blade, 312, a noise reduction structure, 320, a first guide, 322, a first guide, 324, a second guide, 326, a first air outlet, 327, a first air inlet, 328, a third wind guide channel, 330, a second guide, 332, a second air outlet, 400, a flow guide structure, 410, a third guide, 412, a third guide, 420, a fourth guide, 422, a flow guide inclined plane, 424, a second air inlet, 426, a third air outlet, 500, an air outlet grid, 510, a diffusion part, 600, a filtering part, 700, an installation shaft sleeve, 710, a shock absorbing part, 800 and a reinforcing rib.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be integral with the other element or can be removably connected to the other element.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Further, it is to be understood that, in the present embodiment, the positional relationships indicated by the terms "lower", "upper", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "one side", "the other side", "one end", "the other end", and the like are based on the positional relationships shown in the drawings; the terms "first," "second," and the like are used herein to distinguish one structural element from another. These terms are merely for convenience of description and simplicity of description, and are not to be construed as limiting the present invention.

As shown in fig. 1, an air duct assembly in one embodiment includes: a first air guide 100, the first air guide 100 comprising a first air guide duct 110; and the second air guide member 200, the second air guide member 200 includes a second air guide duct 210, an air outlet of the second air guide duct 210 is communicated with an air inlet of the first air guide duct 110, and the area of the cross section of the second air guide duct 210 is gradually reduced along the direction from the air inlet of the second air guide duct 210 to the air outlet of the second air guide duct 210.

When the air duct assembly is used, the air flow flows to the first air guide air duct 110 along the second air guide air duct 210, the area of the cross section of the second air guide air duct 210 is gradually reduced along the direction from the air inlet of the second air guide air duct 210 to the air outlet of the second air guide air duct 210, and further, when the air flows in the second air guide air duct 210, the air flow can be uniformly accelerated, and meanwhile, the air flow can be guided to the first air guide air duct 110 after being collected in a centralized manner, so that the air inlet efficiency is improved, the flow loss of the air flow is low, and further, the air quantity is improved.

As shown in fig. 1, in addition to the above-described embodiment, the inner wall of the first air guiding duct 110 is provided with the escape portion 120 protruding in the radial direction of the first air guiding duct 110. In this way, the provision of the escape portion 120 facilitates the mounting of other components and reduces the volume of the first air guide 100.

An air purifier 10 in one embodiment includes the air duct assembly of any of the above embodiments.

Above-mentioned air purifier 10 is when using, the air current flows to first wind-guiding wind channel 110 along second wind-guiding wind channel 210, because the area of the cross section of second wind-guiding wind channel 210 reduces along the direction of the air intake of second wind-guiding wind channel 210 to the air outlet of second wind-guiding wind channel 210 gradually, and then, when wind flows at second wind-guiding wind channel 210, the air current can evenly accelerate, simultaneously can concentrate the air current and collect the back and lead in first wind-guiding wind channel 110, promote the air inlet efficiency, and the flow loss of air current is lower, and then promoted the amount of wind.

As shown in fig. 1, in addition to the above embodiments, the air purifier 10 further includes an impeller 300, and the impeller 300 is disposed in the first wind guiding duct 110. In this way, the impeller 300 drives the airflow to flow along the second wind guiding duct 210 to the first wind guiding duct 110.

As shown in fig. 1 and fig. 2, specifically in this embodiment, the impeller 300 includes a blade 310 and a first guide 320, the first guide 320 includes a third wind guide channel 328, one end of the blade 310 is fixedly disposed on an inner wall of the third wind guide channel 328, an air inlet of the third wind guide channel 328 is communicated with an air outlet of the second wind guide channel 210, an inner wall of the third wind guide channel 328 is provided with a guide structure, and the guide structure is used for guiding an air flow to the air outlet of the third wind guide channel 328 along the air inlet of the third wind guide channel 328. Thus, when the first guide 320 and the impeller 300 rotate synchronously, the airflow flows to the first wind guiding duct 110 along the second wind guiding duct 210 under the driving of the impeller 300, and when the airflow passes through the guide structure, the airflow flows out towards the radial oblique upper side of the first wind guiding duct 110 under the action of the guide structure, so that the airflow is uniformly dispersed, and the generation of vortices is avoided.

As shown in fig. 1, specifically in this embodiment, the first guiding element 320 includes a first air inlet end 327 and a first air outlet end 326, the first air inlet end 327 and the first air outlet end 326 are communicated to form a third air guiding duct 328, an angle between a tangent of an end portion of the first air outlet end 326 and a radial direction of the third air guiding duct 328 is a, where a is greater than or equal to 90 ° and less than or equal to 120 °. When a is within the range, the impact of the airflow on the inner wall of the first air guiding duct 110 can be effectively reduced, and the impact loss is reduced. In particular, a may be 90 °, 95 °, 100 °, 105 °, 110 °, 115 °, or 120 °. Specifically, the first air inlet end 327 and the first air outlet end 326 are communicated to form the third air guiding duct 328, that is, the end of the first air inlet end 327 is provided with an air inlet through hole, the end of the first air outlet end 327 is provided with an air outlet through hole, and the third air guiding duct 328 is communicated with the air outlet through hole through the air inlet through hole to form the third air guiding duct 328.

In this embodiment, the guiding structure includes a first guiding portion 322 protruding inward and a second guiding portion 324 protruding outward, the first guiding portion 322 is connected to the second guiding portion 324, the first guiding portion 322 is close to the first air inlet end 327, and the second guiding portion 324 is close to the first air outlet end 326. Thus, the first air guiding portion 322 is disposed to protrude inward, and the first air guiding portion 322 is close to the first air inlet end 327, so that the airflow is not easy to generate vortex at the first air inlet end 327, and thus airflow backflow can be avoided or reduced, and thus, the air outlet amount of the impeller 300 can be increased; the second guiding portion 324 is recessed outward, and the second guiding portion 324 is close to the first air outlet end 326, so that the air outlet area can be increased, and the air outlet volume can be increased. Certainly, in other embodiments, the first guide portion 322 may have a protruding structure and is fixedly disposed on the inner wall of the third guiding air duct 328, so that the airflow can flow along the side wall of the first guide portion 322, and backflow caused by vortex of the airflow is avoided.

As shown in fig. 1 and fig. 2, in this embodiment, the impeller 300 includes a blade 310 and a second guiding element 330, the second guiding element 330 is disposed between the blade 310 and the air outlet of the first air guiding duct 110, the other end of the blade 310 is connected to one end of the second guiding element 330, and the area of the cross section of the second guiding element 330 gradually increases along the direction from the air inlet of the first air guiding duct 110 to the air outlet of the first air guiding duct 110. Thus, when the second guide 330 and the impeller 300 rotate synchronously, the air flow flows to the first air guiding duct 110 along the second air guiding duct 210 under the driving of the impeller 300, and when the air flow passes through the second guide 330, the structure of the second guide 330 is basically consistent with the flowing direction of the air flow, so that the air outlet is smooth, the air flow interference is reduced, the vortex intensity is reduced, the rotation noise is reduced, the friction resistance is reduced, and the air outlet efficiency is improved. In this embodiment, the second guide 330 has a disk-shaped structure.

Specifically, in this embodiment, the other end of the second guiding element 330 is a second air outlet end 332, and the cross-sectional area of the first air outlet end 326 is larger than that of the second air outlet end 332. Thus, the distance between the second air outlet end 332 and the first air guiding duct 110 is large, and then the air outlet space of the air flow between the second air outlet end 332 and the inner wall of the first air outlet duct is large, and further the air outlet volume is large. As shown in fig. 7, in the present embodiment, the second guiding element 330 includes a second guiding portion 324 that is recessed outward, the second guiding portion 324 is close to the first air outlet end 326, the first air outlet end 326 faces the second air outlet end 332, and at this time, the airflow flowing from the second guiding element 330 to the first guiding element 320 is increased, so as to increase the air volume to a certain extent; the cross-sectional area of the first guiding member 320 gradually increases along the direction from the first air inlet end 327 to the first air outlet end 326, so that the structure of the first guiding member 320 also has the function of increasing the air volume; further, the first guide member 320 and the second guide member 330 cooperate with each other, the flow guiding trends of the first guide member 320 and the second guide member 330 are kept matched with each other structurally, the second guide member 330 is outwardly recessed at the first air outlet end 326, and the first guide member 320 is also outwardly recessed, so that the air volume can be increased by the cooperation of the first guide member 320 and the second guide member 330.

As shown in fig. 1 and fig. 3, on the basis of any of the above embodiments, the air purifier 10 further includes a flow guiding structure 400, the flow guiding structure 400 is disposed in the first wind guiding channel 110, the flow guiding structure 400 is spaced from the impeller 300, and the flow guiding structure 400 is disposed between the air outlet of the first wind guiding channel 110 and the impeller 300, and is configured to guide the airflow toward the air outlet of the first wind guiding channel 110. Thus, the air discharged from the air outlet end 426 of the impeller 300 is guided to the air outlet of the first air guiding duct 110 by the guiding structure 400.

As shown in fig. 1, specifically in this embodiment, the flow guiding structure 400 includes a third guiding element 410, the third guiding element 410 includes a third guiding portion 412, and an area of a cross section of the third guiding portion 412 is gradually reduced along a direction from the air inlet of the first air guiding duct 110 to the air outlet of the first air guiding duct 110. In this way, on the one hand, the third guide part 412 can expand the air flow from the air outlet of the first air guiding duct 110, so as to convert the dynamic pressure energy of the air outlet of the first air guiding duct 110 into static pressure energy, and on the other hand, the third guide part 412 can make the air flow uniformly.

As shown in fig. 1, fig. 3 and fig. 4, specifically, in this embodiment, the flow guiding structure 400 includes a fourth guiding element 420, the fourth guiding element 420 is fixedly disposed on an outer wall of the third guiding element 410, the fourth guiding element 420 includes a flow guiding inclined plane 422, and the flow guiding inclined plane 422 is disposed toward the air outlet of the first air guiding duct 110, and is configured to guide the air flow along the direction of the air outlet of the first air guiding duct 110. Thus, the guide slope 422 can twist the rotating airflow flowing out of the blade 310, so that the kinetic energy of a part of deflected airflow is converted into static pressure energy, and meanwhile, the friction and vortex loss kinetic energy caused by airflow rotation are reduced, further, part of radial airflow can be converted into axial airflow through the guide effect of the guide slope 422, and the energy is collected to improve the performance. In this embodiment, the inclined direction of the diversion inclined plane 422 corresponds to the flowing direction of the airflow, so that the flow loss can be reduced.

As shown in fig. 3 and 4, further, in the present embodiment, the diversion inclined plane 422 is an arc-shaped plane that is concave inward. Thus, twisting the rotating airflow exiting the blades 310 is accomplished by the arcuate surfaces, converting some of the kinetic energy of the deflected airflow into static pressure energy, while reducing friction and vortex loss kinetic energy due to the rotation of the airflow.

As shown in fig. 3 and 4, specifically in this embodiment, the fourth guiding member 420 includes a second air inlet end 424 and a third air outlet end 426, the diversion inclined plane 422 is disposed between the second air inlet end 424 and the third air outlet end 426, and the thickness of the fourth guiding member 420 gradually decreases along a direction from the second air inlet end 424 to the third air outlet end 426. Thus, the variation in the thickness of the fourth guide 420 may provide the fourth guide 420 with excellent aerodynamic characteristics, high strength, and high aerodynamic efficiency, similar to an airfoil-shaped guide vane.

As shown in fig. 4, in the present embodiment, an angle between a tangent line of an end portion of the third outlet end 426 and a radial direction of the first air guiding duct 110 is β, wherein 85 ° ≦ β ≦ 110 °, and thus, when β is in this range, the fourth guide 420 has excellent aerodynamic characteristics, specifically, β may be 85 °, 90 °, 95 °, 100 °, 105 °, or 110 °.

As shown in fig. 4, in the present embodiment, an angle between a tangent line of the end of the second air inlet 424 and the radial direction of the first air guiding duct 110 is γ, where γ is greater than or equal to 25 ° and less than or equal to 45 °. Thus, when γ is in this range, the fourth guide 420 has excellent aerodynamic characteristics. In particular, γ may be 25 °, 30 °, 35 °, 40 °, or 45 °.

In the embodiment, the distance between the impeller 300 and the flow guide structure 400 is H, wherein H is greater than or equal to 5mm and less than or equal to 15 mm. Thus, when H is within this range, the flow of air entering the gap between the flow guide structure 400 and the impeller 300 can be reduced, the generation of vortex can be reduced, and the aerodynamic performance of the impeller 300 can be improved. In particular, H may be 5mm, 10mm or 15 mm.

In the embodiment, the distance between the impeller 300 and the inner wall of the first air guiding duct 110 is L, wherein L is greater than or equal to 4mm and less than or equal to 7 mm; thus, when L is within this range, it is beneficial to reduce the volume loss of the first air guiding duct 110, improve the efficiency of the impeller 300, and avoid the friction between the impeller 300 and the inner wall of the first air guiding duct 110 during high-speed rotation. In particular, L may be 4mm, 5mm, 6mm or 7 mm.

On the basis of any of the above embodiments, the air purifier 10 further includes an air outlet grille 500, and the air outlet grille 500 is disposed at the air outlet of the first air guiding duct 110. Therefore, the airflow can be orderly and uniformly discharged, foreign matters can be effectively reduced from entering the first air guide duct 110, and safety accidents are prevented. As shown in fig. 5, in this embodiment, the air-out grille 500 includes a diffuser portion 510, the diffuser portion 510 is disposed at an outlet end of the air-out grille 500, and a cross-sectional area of the diffuser portion 510 gradually increases along a direction from an air inlet of the first guiding air duct 110 to an air outlet of the first guiding air duct 110, so as to increase an air-discharging area.

As shown in fig. 1, in addition to any of the above embodiments, the air purifier 10 further includes a filter 600, and the filter 600 is disposed at the air inlet of the second air guiding duct 210. So, filter the air that gets into second wind-guiding wind channel 210 through setting up and filter 600, promote the cleanliness factor. In particular, the filter element 600 may be a high efficiency filter screen or a filter cartridge. In this embodiment, the mounting member 700 is included, the mounting member 700 is disposed at the air inlet of the second air guiding duct 210, and the connecting member 700 is used for mounting the filter 600. Of course, in other embodiments, the mounting member 700 is integrally formed with the second wind guide member 200.

As shown in FIG. 8, in the present embodiment, on the basis of any of the above-described embodiments, the angle c of the inlet stagger angle of the blade 310 is set to 25 ≦ c ≦ 40. Thus, the air output of the impeller 300 is more stable in this range. Specifically, c may be 25 °, 30 °, 35 °, and 40 °.

As shown in FIG. 8, on the basis of any of the above-mentioned embodiments, the angle d of the outlet setting angle of the blade 310 is such that 30 DEG.ltoreq.d.ltoreq.50 deg. Thus, the air output of the impeller 300 is more stable in this range. Specifically, d may be 30 °, 35 °, 40 °, 45 °, and 50 °.

In any of the above embodiments, the third wind guiding duct 328 is located at the first wind outlet end 326, and the inner diameter of the third wind guiding duct is R₁The third wind guiding duct 328 is located at the first wind outlet end 326 and has an outer diameter R₂，0.65R₂≤R₁≤0.8R₂. Thus, the air output of the impeller 300 is more stable in this range. On the basis of this embodiment, the outer diameter of the third wind guiding duct 328 at the first wind outlet end 326 is R₂Wherein R is more than or equal to 160mm₂Less than or equal to 170 mm. In this range, the air output of the impeller 300 is more stable. Specifically, R₂May be 160mm, 165mm and 170 mm.

As shown in fig. 6 and 7, in addition to any of the above embodiments, the present invention further includes a mounting sleeve 700 for connecting with the rotary power device, the second guide 330 is provided with a mounting hole, and the mounting sleeve 700 is disposed in the mounting hole. So, rotating power device and driving second guide 330 and rotate, second guide 330, blade 310 and the synchronous rotation of first guide 320, the axle sleeve installation can be moulded plastics integrated into one piece with second guide 330 secondary, guarantees the equipment precision, and connection stability is higher, need not independent assembly, reduces process flow, reduction in production cost. On the basis of the embodiment, the shock absorbing device further comprises a shock absorbing member 710, and the shock absorbing member 710 is fixedly arranged on the inner wall of the mounting shaft sleeve 700. Therefore, the vibration caused by the high-speed operation of the blades 310 can be effectively reduced, and the impeller 300 can operate more stably. Specifically, the rotary power device may be a motor or a speed reducing mechanism or other device for providing a rotary power source.

As shown in fig. 6, specifically in this embodiment, the second guide 330 includes a mounting body, the mounting body is provided with a mounting hole, and an outer wall of the mounting body is provided with a reinforcing rib 800. As such, the strength of the second guide 330 is enhanced by providing the reinforcing ribs 800. In this embodiment, the number of the reinforcing ribs 800 is plural, and the reinforcing ribs 800 are provided at intervals in the circumferential direction of the installation body, so that the strength of the second guide 330 is further improved. In this embodiment, the mounting body is a mounting post, and the mounting post may be integrally formed with the second guiding element 330, or may be mounted on the second guiding element 330 through a corresponding connection relationship, which is not described herein again.

As shown in FIG. 6, in any of the above embodiments, the blade 310 is provided with a noise reducing structure 312 having a serrated shape. Therefore, the discrete noise is effectively reduced, the eddy current noise is reduced, and the noise of the whole machine is reduced. In the present embodiment, the noise reduction structure 312 is disposed at the trailing edge of the blade 310, i.e. disposed near the first air outlet end 326, so as to reduce the discrete noise at the first air outlet end 326 and reduce the vortex noise. In this embodiment, the noise reduction structures 312 are disposed in an arc shape and correspond to the extending direction of the blades 310 in the distribution direction of the noise reduction structures 312, so that the noise reduction structures 312 are consistent with the flowing direction of the air flow, and further, the noise reduction effect can be more effectively achieved.

In this embodiment, the number of the blades 310 is 8 to 20. In this way, the performance of the impeller 300 is most stable and the air volume is also most stable within this range.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An air duct assembly, comprising:

the first air guide piece comprises a first air guide duct; and

the second air guide piece comprises a second air guide air channel, an air outlet of the second air guide air channel is communicated with an air inlet of the first air guide air channel, and the area of the cross section of the second air guide air channel is along the direction from the air inlet of the second air guide air channel to the air outlet of the second air guide air channel is gradually reduced.

2. The air duct assembly according to claim 1, wherein the inner wall of the first air guide duct is provided with an avoiding portion protruding toward the radial direction of the first air guide duct.

3. An air cleaner comprising the duct assembly of claim 1 or 2.

4. The air purifier of claim 3, further comprising an impeller disposed within the first air deflection duct.

5. The air purifier of claim 4, wherein the impeller comprises a first guide member, the first guide member comprises a third air guiding duct, an air inlet of the third air guiding duct is communicated with an air outlet of the second air guiding duct, and a guide structure is disposed on an inner wall of the third air guiding duct and is configured to guide the airflow to the air outlet of the third air guiding duct along the air inlet of the third air guiding duct.

6. The air purifier of claim 5, wherein the first guide member comprises a first air inlet end and a first air outlet end, and the first air inlet end and the first air outlet end are communicated to form a third air guiding duct.

7. The air purifier as claimed in claim 6, wherein an angle between a tangent of the end of the first outlet end and a radial direction of the third wind guide duct is a, and wherein a is greater than or equal to 90 ° and less than or equal to 120 °.

8. The air purifier of claim 6, wherein the impeller includes a second guide member, the second guide member is spaced apart from the first guide member, the second guide member is disposed between the first guide member and the air outlet of the first air guide duct, and a cross-sectional area of the second guide member gradually increases along a direction from the air inlet of the first air guide duct to the air outlet of the first air guide duct.

9. The air purifier as claimed in claim 8, wherein the impeller further comprises a blade, one end of the blade is fixedly disposed on the inner wall of the third guiding wind channel, and the other end of the blade is connected to one end of the second guiding member.

10. The air cleaner of claim 8, wherein the other end of the second guide member is a second outlet end, and the cross-sectional area of the first outlet end is larger than the cross-sectional area of the second outlet end.

11. The air purifier of claim 6, wherein the guiding structure comprises a first guiding portion protruding inward and a second guiding portion recessed outward, the first guiding portion is connected with the second guiding portion, the first guiding portion is close to the first air inlet end, and the second guiding portion is close to the first air outlet end.

12. The air purifier of claim 4, further comprising a flow guide structure disposed in the first wind guide channel, the flow guide structure being spaced apart from the impeller, and the flow guide structure being disposed between the air outlet of the first wind guide channel and the impeller for guiding the airflow toward the air outlet of the first wind guide channel.

13. The air purifier of claim 12, wherein the flow guide structure comprises a third guide member, the third guide member comprises a third guide portion, and the area of the cross section of the third guide portion gradually decreases along the direction from the air inlet of the first air guide duct to the air outlet of the first air guide duct.

14. The air purifier of claim 13, wherein the flow guide structure comprises a fourth guide member, the fourth guide member is fixedly disposed on an outer wall of the third guide member, and the fourth guide member comprises a flow guide inclined surface disposed toward the air outlet of the first air guide duct, so as to guide the airflow along the direction of the air outlet of the first air guide duct.

15. The air cleaner of claim 14, wherein the deflector ramp is an inwardly concave arcuate surface.

16. The air purifier of claim 14, wherein the fourth guide member comprises a second air inlet end and a third air outlet end, the diversion slope is disposed between the second air inlet end and the third air outlet end, and a thickness of the fourth guide member gradually decreases along a direction from the second air inlet end to the third air outlet end.

17. The air cleaner of claim 16, wherein an angle between a tangent to an end of the third outlet end and a radial direction of the first air guide duct is β, wherein 85 ° ≦ β ≦ 110 °.

18. The air cleaner of claim 16, wherein an angle γ is formed between a tangent to an end of the second air intake end and a radial direction of the first air guide duct, and wherein γ is 25 ° or more and 45 ° or less.

19. The air purifier of claim 12, wherein the impeller is spaced apart from the flow directing structure by a distance H, wherein H is greater than or equal to 5mm and less than or equal to 15 mm.

20. The air purifier as claimed in claim 4, wherein the distance between the impeller and the inner wall of the first air guiding duct is L, and L is greater than or equal to 4mm and less than or equal to 7 mm.

21. The air purifier of claim 3, further comprising an air outlet grille disposed at an air outlet of the first air guiding duct.

22. The air purifier as claimed in any one of claims 3 to 21, further comprising a filter element disposed at the air inlet of the second air guiding duct.