CN111379719A

CN111379719A - Air circulation device, air purifier and air humidifier

Info

Publication number: CN111379719A
Application number: CN202010286492.0A
Authority: CN
Inventors: 李道文
Original assignee: Guangdong Unique Electrical Co ltd
Current assignee: Guangdong Unique Electrical Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-07-07
Also published as: WO2021208155A1; KR20210127577A; JP3228004U

Abstract

The invention belongs to the field of household appliances, and particularly relates to an air circulation device, an air purifier and an air humidifier, which comprise a supporting seat, a fan, a centrifugal wind wheel, a volute and a driving mechanism; the supporting seat is internally provided with an air hole; the volute is rotatably connected with the supporting seat, one end of the volute, which is close to the supporting seat, is provided with a through hole communicated with the air hole, and the side surface of the volute is provided with an air outlet; an installation part is arranged in the air hole, and a plurality of connecting ribs are connected between the installation part and the inner side wall of the air hole; the fan is fixedly arranged on the mounting part, a main shaft of the fan penetrates through the through hole and extends into the volute, the centrifugal wind wheel is fixedly connected to the main shaft of the fan, and the centrifugal wind wheel is positioned in the volute; the driving mechanism is connected with the volute and is used for rotating the volute; because when the volute rotates, the fan is always kept still, the problem of winding of the wiring is avoided, the whole structure is simplified, and the production and manufacturing cost is reduced.

Description

Air circulation device, air purifier and air humidifier

Technical Field

The invention belongs to the field of household appliances, and particularly relates to an air circulating device and an air purifier.

Background

The air circulation device is used for enabling air to flow, can uniformly mix air in the surrounding environment and achieves the temperature of the air to be close to that of the air, such as an air circulation fan in an air-conditioned room. The device can also blow flowing air flow out of human bodies or other objects to achieve the effects of heat dissipation and temperature reduction, such as a fan. It can also be used for quick drying on peripheral objects or on the ground, such as air dryers, ground air dryers and the like.

The existing air circulating fans are mainly divided into two types, one type is fixed, and the air circulating fans always output air towards one position; the other is a swing type, which usually swings left and right, while the airflow blown out by the fixed type and the swing left and right has limited coverage, and cannot realize large-scale air blowing in public places such as integrated offices, shopping malls or waiting rooms, and a plurality of fans are needed to realize circulation of air in the whole indoor space in order to cover the whole space by the airflow. In order to solve the problem of small air flow coverage, a 360-degree circulating fan gradually enters life and work; however, the existing 360-degree circulating fan drives a motor of the circulating fan to rotate with a machine head through power; the motor needs to be connected with electricity through an electric wire, so that when the motor rotates, in order to avoid the problem of winding of the electric wire, the electricity is connected by adopting a rotary electric connector at present; this increases the cost of the circulation fan, complicates the structure, causes wear of the rotary joint, reduces the overall service life, increases the contact resistance of the rotary structure due to the contact friction type energization, increases the temperature, and increases the power consumption.

Disclosure of Invention

The invention aims to provide an air circulating device, and aims to solve the problems that the existing 360-degree circulating fan is complex in structure and high in cost for realizing 360-degree rotation, and the service life is shortened and the energy consumption is increased.

In order to achieve the above object, an air circulation device provided in an embodiment of the present invention includes a support base, a fan, a centrifugal wind wheel, a volute, and a driving mechanism; the supporting seat is internally provided with an air hole; the volute is rotatably connected with the supporting seat, a through hole communicated with the air hole is formed in one end, close to the supporting seat, of the volute, and an air outlet is formed in the side face of the volute; an installation part is arranged in the air hole, and a plurality of connecting ribs are connected between the installation part and the inner side wall of the air hole; the fan is fixedly arranged on the mounting part, a main shaft of the fan penetrates through the through hole and extends into the volute, the centrifugal wind wheel is fixedly connected to the main shaft of the fan, and the centrifugal wind wheel is positioned in the volute; the driving mechanism is connected with the volute and used for driving the volute to rotate.

Furthermore, the top of supporting seat is followed the edge of wind hole upwards extends has first adapter sleeve, the bottom of spiral case is followed through-hole edge downwardly extending has the second adapter sleeve, first adapter sleeve pivoted cover is established on the second adapter sleeve, perhaps second adapter sleeve pivoted cover is established on the first adapter sleeve.

Furthermore, a rotary wear-resistant sleeve or a bearing is arranged between the first connecting sleeve and the second connecting sleeve.

Further, still be equipped with the dustcoat on the supporting seat, the spiral case accomodate with in the cavity of dustcoat, the lateral wall distribution of dustcoat has a plurality of bleeder vents.

Furthermore, an extension part extends downwards from the top end of the outer cover, and a connecting part which is rotatably connected with the extension part extends upwards from the top end of the volute.

Further, the second connecting sleeve is rotatably sleeved on the outer ring of the first connecting sleeve; the driving mechanism comprises a first gear arranged on the outer ring of the second connecting sleeve, a first driving motor arranged on the supporting seat, and a second gear which is arranged on a main shaft of the first driving motor and meshed with the first gear; the first gear is sleeved on the second connecting sleeve, or the first gear is integrally formed on the second connecting sleeve.

Further, connecting portion pivoted cover is established the outer lane of extension, actuating mechanism includes, locates the second driving motor on the inside top of dustcoat locates the third gear of the outer lane of connecting portion locates on the main shaft of second driving motor, and with third gear engagement's fourth gear.

Furthermore, the bottom of the supporting seat extends downwards along the edge of the air hole to form a switching part, a switching sleeve extending upwards along the through hole is arranged at the top of the volute, and the switching part is rotatably connected with the switching sleeve.

The support seat is characterized by further comprising a shell and a base, wherein the upper end of the shell is sleeved at the bottom end of the support seat, and the shell is supported on the base; a plurality of air holes are distributed on the side wall of the shell; the top end of the base extends upwards to form a supporting part, and the bottom of the volute extends downwards to form a supporting sleeve which is rotatably connected with the supporting part.

Further, the switching cover is established with rotating the ground the circle of switching portion, actuating mechanism includes: the fifth gear is arranged on the outer ring of the adapter sleeve, the third driving motor is arranged on the supporting seat, the sixth gear is arranged on a main shaft of the third driving motor, and the sixth gear is meshed with the fifth gear.

Further, support the cover and establish with rotating on the supporting part, actuating mechanism includes: the supporting sleeve comprises a seventh gear arranged on the outer ring of the supporting sleeve, a fourth driving motor arranged on the base and an eighth gear arranged on a main shaft of the fourth driving motor and meshed with the seventh gear.

An air purifier comprises the air circulation device, a filter element and a bottom shell; the filter element is arranged in the bottom shell, the supporting seat is arranged at the upper end of the bottom shell, the bottom surface of the supporting seat is in sealed fit with the top of the filter element, the air hole is communicated with the inner hole of the filter element, the bottom of the bottom shell is provided with a fitting part in sealed fit with the bottom of the filter element, and a plurality of air inlets are distributed in the side wall of the bottom shell.

An air purifier comprises the air circulation device and a filter element, wherein the filter element is arranged on the supporting seat, and the bottom of the filter element covers the upper end of the air hole; the edge of the supporting seat extends upwards to form a cylinder, the filter element is accommodated in a cavity of the cylinder, and the side wall of the cylinder is provided with a plurality of air inlets respectively; the top of barrel is equipped with sealed lid, sealed lid is used for sealing the opening on the filter core.

Further, the bottom of supporting seat still is equipped with the support housing, the fan with the spiral case accomodate with in the support housing, the lateral wall of support housing distributes and has a plurality of mouths of blowing.

The air humidifier comprises the air circulation device and an atomization device, wherein the support seat is arranged at the upper end of an air outlet of the atomization device.

One or more technical solutions in the air circulation device provided by the embodiment of the present invention at least have the following technical effects:

1. when the fan drives the centrifugal wind wheel to rotate at a high speed, the blades of the centrifugal wind wheel can throw air in the volute out of the air outlet of the volute, meanwhile, external air can enter the volute from the air hole, and then the air in the volute is continuously blown out outwards, so that air circulation is achieved, and the wind energy blown out from the air outlet achieves the purposes of heat dissipation and cooling and the whole indoor air circulation. The driving mechanism pushes the volute to rotate, so that 360-degree rotation is realized, the existing 360-degree fan is replaced, and the problem of winding of wiring is avoided because the fan is always kept still when the volute rotates, so that the whole structure is simplified, and the production and manufacturing cost is reduced.

2. The centrifugal wind wheel is stored in the volute, the centrifugal wind wheel is prevented from being exposed, and the air outlet is formed in the side face of the volute, so that foreign matters can be prevented from falling into the volute, and the centrifugal wind wheel rotating at a high speed is prevented from being impacted and damaged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a sectional view of an air circulation device 1 according to an embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a sectional view of an air circulation device in accordance with embodiment 2 of the present invention.

Fig. 4 is an exploded view of the interior of an air circulation device according to embodiment 2 of the present invention.

Fig. 5 is a cross-sectional view of an embodiment of an air cleaner according to an embodiment of the present invention.

Fig. 6 is a sectional view of another embodiment of an air cleaner according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In one embodiment of the present invention, as shown in fig. 1 to 4, the air circulation device 1 includes a support base 100, a fan 200, a centrifugal wind wheel 300, a volute 400, and a driving mechanism 500. An air hole 101 is formed in the supporting seat 100; the volute 400 is rotatably connected with the support seat 100, a through hole 401 communicated with the air hole 101 is formed in one end, close to the support seat 100, of the volute 400, and an air outlet 402 is formed in the side face of the volute 400. An installation part 102 is arranged in the air hole 101, and a plurality of connecting ribs 103 are connected between the installation part 102 and the inner side wall of the air hole 101. Fan 200 sets firmly in on the installation department 102, just fan 200's main shaft passes through-hole 101 stretches into in the spiral case 400, centrifugal wind wheel 300 fixed connection is in on fan 200's the main shaft, just centrifugal wind wheel 300 is located in the spiral case 400. The driving mechanism 500 is connected to the volute 400 and is used for driving the volute 400 to rotate. In this embodiment, when the fan 200 drives the centrifugal wind wheel 300 to rotate, the blades of the centrifugal wind wheel 300 throw the air in the volute 400 out of the air outlet 402, and meanwhile, the external air enters the volute 400 from the air hole 101, so that the air outlet 402 can continuously blow outwards to form air convection, and the surrounding air is circulated; meanwhile, the blown air flow can be blown to the human body to dissipate heat and reduce summer heat, and can also be blown to the ground or other objects to quickly dry the ground or other objects. And the volute 400 is pushed to rotate by the driving mechanism 500, so that the air outlet 402 can continuously rotate, the existing 360-degree fan is replaced, and the problem of wiring winding is avoided as the fan 200 is kept still as the volute 400 rotates, so that the whole structure is simplified, and the production and manufacturing cost is reduced. Moreover, the centrifugal wind wheel 300 is accommodated in the volute 400, so that the centrifugal wind wheel 200 is prevented from being exposed, and the air outlet 402 is arranged on the side surface of the volute 400, so that foreign matters can be prevented from falling into the volute 400 and causing impact damage to the centrifugal wind wheel 200 rotating at a high speed.

An embodiment of realizing that spiral case 400 and supporting seat 100 rotate and be connected, refer to fig. 1 and fig. 2, the top of supporting seat 100 is followed the edge of wind hole 101 upwards extends has first adapter sleeve 110, the bottom of spiral case 400 is followed through-hole 401 edge downwardly extending has second adapter sleeve 410, first adapter sleeve 410 pivoted cover is established on second adapter sleeve 410, or second adapter sleeve 410 pivoted cover is established on first adapter sleeve 110. The first connecting sleeve 110 is connected with the second connecting sleeve 410, so that the volute 400 is rotatably connected with the supporting seat 100.

Further, a rotating wear-resistant sleeve or a bearing is further disposed between the first connecting sleeve 110 and the second connecting sleeve 410. In this embodiment, by adding the rotating wear-resistant sleeve or the bearing, the friction between the first connecting sleeve 110 and the second connecting sleeve 410 can be effectively reduced, the normal operation of the volute 400 can be ensured, and the wear can be reduced.

Further, referring to fig. 1 and 2, an outer cover 111 is further disposed on the support base 100, the volute 400 is accommodated in a cavity of the outer cover 111, and a plurality of air holes 112 are distributed on a side wall of the outer cover 111. The embodiment is mainly applied to heat dissipation and cooling of a human body, and particularly, after high-speed airflow thrown out by the centrifugal wind wheel 300 is buffered by the external 111, the high-speed airflow is blown to the human body through the air holes 112, so that the problem that the airflow is directly blown out from the air outlet 402 to cause overlarge wind speed and discomfort to the human body can be avoided.

In order to stabilize the scroll casing 400 during rotation, in this embodiment, an extension portion 113 extends downward from the top end of the outer casing 111, and specifically, referring to fig. 1 and 2, a connection portion 411 rotatably connected to the extension portion 113 extends upward from the top end of the scroll casing 400. In this embodiment, the upper and lower ends of the scroll 400 are limited, so that the scroll is more stable when rotating.

Further, in an embodiment of the driving mechanism 500 for driving the volute 400 to rotate, specifically, referring to fig. 1 and fig. 2, the second connecting sleeve 410 is rotatably sleeved on the outer ring of the first connecting sleeve 110, and the driving mechanism 500 includes a first gear 501, a first driving motor 502, and a second gear 503. A first gear 501 is arranged on the outer ring of the second connecting sleeve 410, a first driving motor 502 is arranged on the supporting seat 100, and a second gear 503 meshed with the first gear 501 is arranged on a main shaft of the first driving motor 502; the first gear 501 is sleeved on the second connecting sleeve 410, or the first gear 501 is integrally formed on the outer ring of the second connecting sleeve 410. In this embodiment, the spindle of the first driving motor 502 drives the second gear 503 to rotate, and the second gear 503 is engaged with the first gear 501 to drive the scroll 400 to rotate.

Further, in order to satisfy the user demand of the consumer, if blow as long as the minizone, or form the condition of air convection, as long as the spiral case 400 swings at the minizone, first driving motor 503 in this embodiment is synchronous motor, consequently, only need place the barrier respectively in the both sides of spiral case 400, consequently when spiral case 400 rotates, when touchhing the barrier, synchronous motor then can the antiport, and then realize the effect of spiral case 400 horizontal hunting, and can be as required, can adjust the position between two barriers, reach the angle of adjusting spiral case 400 beat, reach the user demand who satisfies the consumer.

Further, another embodiment where the drive mechanism 500 drives the rotation of the volute 400, the drive mechanism 500 includes a second drive motor, a third gear and a fourth gear. Connecting portion 411 pivoted cover is established the outer lane of extension 113, the inside top of dustcoat 111 is equipped with second driving motor, the outer lane of connecting portion 411 is equipped with the third gear, be equipped with on the main shaft of second driving motor with third gear engagement's fourth gear. Since this embodiment is the same as the above-described driving method, the embodiment avoids redundancy, and thus the accompanying drawings and detailed description are not provided. Further, the second driving motor is a synchronous motor.

Referring to fig. 3 and 4, in another embodiment of rotatably mounting the volute 400 and the support seat 100, specifically, as follows, an adapter 120 extends downward from the bottom of the support seat 100 along the edge of the air hole 101, an adapter sleeve 420 extending upward from the through hole 401 is disposed at the top of the volute 400, and the adapter 120 is rotatably connected to the adapter sleeve 420. In this embodiment, the adapting sleeve 420 is rotatably connected to the adapting portion 120, so that the volute 400 is rotatably connected to the bottom of the supporting seat 100.

Further, in order to realize that the air circulation device 1 can be supported on the bottom surface or the table top, and to increase the stability of the operation of the scroll 400; the embodiment is as follows: the support seat further comprises a shell 600 and a base 700, wherein the upper end of the shell 600 is sleeved at the bottom end of the support seat 100, and the shell 600 is supported on the base 700; a plurality of air holes 601 are distributed on the side wall of the shell 600; a support portion 701 extends upward from the top end of the base 700, and a support sleeve 421 rotatably connected to the support portion 701 extends downward from the bottom of the volute 400, as shown in fig. 3 and 4. In this embodiment, the supporting seat 100 is supported by the casing 600, so that the whole body can stand on a desktop or a bottom surface, in this embodiment, the casing 600 can buffer the airflow, and the problem that the airflow is directly blown out from the air outlet 402, which causes an overlarge air speed and discomfort to a human body, can be avoided.

Further, an embodiment of a driving mechanism 500 for driving the rotation of the volute 400 is provided, and referring to fig. 3 and 4, the driving mechanism 500 is disposed on the support base 100. The driving mechanism 500 includes a fifth gear 511, a third driving motor 512, and a sixth gear 513. The adapter sleeve 420 is rotatably sleeved on the ring of the adapter part 120, a fifth gear 511 is arranged on the outer ring of the adapter sleeve 420, a third driving motor 512 is further arranged on the supporting seat 100, a sixth gear 513 is arranged on a main shaft of the third driving motor 512, and the sixth gear 513 is meshed with the fifth gear 511. Further, the third driving motor 512 is a synchronous motor.

Further, in another embodiment that the driving mechanism 500 drives the volute 400 to rotate, specifically, the driving mechanism 500 is disposed on the base 700, and in a specific embodiment, the supporting sleeve 421 is rotatably sleeved on the supporting portion 701, an outer ring of the supporting sleeve 421 is provided with a seventh gear, the base 700 is provided with a fourth driving motor, and a main shaft of the fourth driving motor is provided with an eighth gear engaged with the seventh gear.

An air purifier, referring to fig. 5, includes a support base 100, a blower 200, a centrifugal wind wheel 300, a volute 400, a driving mechanism 500, a filter element 800 and a bottom case 900. An air hole 101 is formed in the supporting seat 100; the volute 400 is rotatably connected with the support seat 100, a through hole 401 communicated with the air hole 101 is formed in one end, close to the support seat 100, of the volute 400, and an air outlet 402 is formed in the side face of the volute 400. An installation part 102 is arranged in the air hole 101, and a plurality of connecting ribs 103 are connected between the installation part 102 and the inner side wall of the air hole 101. Fan 200 set firmly in on the installation part 102, just fan 200's main shaft passes through-hole 101 stretches into in the spiral case 400, centrifugal wind wheel 300 fixed connection be in on fan 200's the main shaft, just centrifugal wind wheel 300 is located in the spiral case 400, actuating mechanism 500 connects spiral case 400 for it is rotatory to drive spiral case 400. The filter element 800 is arranged in the bottom case 900, the supporting seat 100 is arranged at the upper end of the bottom case 900, the bottom surface of the supporting seat 100 is hermetically attached to the top of the filter element 800, the air hole 402 is communicated with the inner hole of the filter element 800, the bottom of the bottom case 900 is provided with an attaching portion 901 which is hermetically attached to the bottom of the filter element 800, and the side wall of the bottom case 900 is provided with a plurality of air inlets 902. In this embodiment, when the fan 200 drives the centrifugal wind wheel 300 to rotate, negative pressure is generated inside the volute 400, so that outside air enters the bottom case 900 through the air inlet 902, is filtered by the filter element 800 and then enters the volute 400, and then is thrown out at high speed by the centrifugal wind wheel 300, so as to realize air circulation purification, and the purified air can be blown to the periphery through the rotation of the volute 400, so that the purified air covers a wider area.

Further, the supporting seat 100 and the bottom case 900 can be detached and connected, in this embodiment, the air circulation device 1 can be detached to be used as a fan alone, and the ground on which the air circulation device is placed can be detached to achieve the effect of quick air drying on the ground.

An air purifier, referring to fig. 6, includes a support base 100, a fan 200, a centrifugal wind wheel 300, a volute 400, a driving mechanism 500 and a filter element 800. An air hole 101 is formed in the supporting seat 100; the volute 400 is rotatably connected with the support seat 100, a through hole 401 communicated with the air hole 101 is formed in one end, close to the support seat 100, of the volute 400, and an air outlet 402 is formed in the side face of the volute 400. An installation part 102 is arranged in the air hole 101, and a plurality of connecting ribs 103 are connected between the installation part 102 and the inner side wall of the air hole 101. The fan 200 is fixedly arranged on the mounting part 102, a main shaft of the fan 200 penetrates through the through hole 101 and extends into the volute 400, the centrifugal wind wheel 300 is fixedly connected to the main shaft of the fan 200, and the centrifugal wind wheel 300 is positioned in the volute 400; the drive mechanism 500 is coupled to the volute 400 to drive the volute 400 to rotate. The filter element 800 is arranged on the support base 100, and the bottom of the filter element 800 covers the upper end of the air hole 101; the edge of the supporting seat 100 extends upwards to form a cylinder 130, the filter element 800 is accommodated in the cavity of the cylinder 130, and the side walls of the cylinder 130 are respectively provided with a plurality of air inlets 131; the top of the cylinder 130 is provided with a sealing cover 132, and the sealing cover 132 is used for sealing the upper opening of the filter element 800. In this embodiment, when the fan 200 drives the centrifugal wind wheel 300 to rotate, negative pressure is generated inside the volute 400, so that outside air enters the cylinder 130 through the air inlet 131, is filtered by the filter element 800 and then enters the volute 400, and then is thrown out at high speed by the centrifugal wind wheel 300, so as to realize air circulation purification, and the purified air can be blown to the periphery through the rotation of the volute 400, so that the purified air covers a wider area. In addition, in the embodiment, the purified air can be blown to the human body, so that the human body can be cooled, the user can breathe the purified air, and the multifunctional effect is realized.

Further, a supporting shell 140 is further disposed at the bottom of the supporting seat 100, the fan 200 and the volute 400 are accommodated in the supporting shell 140, and a plurality of air blowing ports 141 are distributed on the side wall of the supporting shell 140. In this embodiment, the support shell 140 is used for supporting the humidifier as a whole, and the inner side wall of the support shell 140 is used for buffering purified air, so that the phenomenon that the air flow is too large and directly blows to a human body is avoided.

The air humidifier comprises the air circulation device 1 and an atomization device, wherein the support seat 100 is arranged at the upper end of an air outlet of the atomization device. In this embodiment, through the water smoke that atomizing device produced, blow indoor all around with steam through air cycle device 1, and then play the humidification effect to the air.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The air circulation device is characterized by comprising a supporting seat, a fan, a centrifugal wind wheel, a volute and a driving mechanism; the supporting seat is internally provided with an air hole; the volute is rotatably connected with the supporting seat, a through hole communicated with the air hole is formed in one end, close to the supporting seat, of the volute, and an air outlet is formed in the side face of the volute; an installation part is arranged in the air hole, and a plurality of connecting ribs are connected between the installation part and the inner side wall of the air hole; the fan is fixedly arranged on the mounting part, a main shaft of the fan penetrates through the through hole and extends into the volute, the centrifugal wind wheel is fixedly connected to the main shaft of the fan, and the centrifugal wind wheel is positioned in the volute; the driving mechanism is connected with the volute and used for driving the volute to rotate.

2. The air circulation device of claim 1, wherein: the top of supporting seat is followed the edge of wind hole upwards extends has first adapter sleeve, the bottom of spiral case is followed through-hole edge downwardly extending has the second adapter sleeve, first adapter sleeve pivoted cover is established on the second adapter sleeve, perhaps second adapter sleeve pivoted cover is established on the first adapter sleeve.

3. The air circulation device of claim 2, wherein: and a rotary wear-resistant sleeve or a bearing is also arranged between the first connecting sleeve and the second connecting sleeve.

4. The air circulation device of claim 2, wherein: still be equipped with the dustcoat on the supporting seat, the spiral case accomodate with in the cavity of dustcoat, the lateral wall of dustcoat distributes and has a plurality of bleeder vents.

5. The air circulation device of claim 4, wherein: the top end of the outer cover extends downwards to form an extension part, and the top end of the volute extends upwards to form a connecting part which is rotatably connected with the extension part.

6. The air circulation device of claim 2, wherein: the second connecting sleeve is rotatably sleeved on the outer ring of the first connecting sleeve; the driving mechanism comprises a first gear arranged on the outer ring of the second connecting sleeve, a first driving motor arranged on the supporting seat, and a second gear which is arranged on a main shaft of the first driving motor and meshed with the first gear; the first gear is sleeved on the second connecting sleeve, or the first gear is integrally formed on the second connecting sleeve.

7. The air circulation device of claim 5, wherein: the connecting portion pivoted cover is established the outer lane of extension, actuating mechanism includes, locates the second driving motor on the inside top of dustcoat locates the third gear of the outer lane of connecting portion locates on the main shaft of second driving motor, and with third gear engagement's fourth gear.

8. The air circulation device of claim 1, wherein: the supporting seat bottom is followed the edge downwardly extending of wind hole has the switching portion, the spiral case top is equipped with along the switching cover that the through-hole upwards extended, switching portion with the switching cover rotates to be connected.

9. The air circulation device of claim 8, wherein: the upper end of the shell is sleeved at the bottom end of the supporting seat, and the shell is supported on the base; a plurality of air holes are distributed on the side wall of the shell; the top end of the base extends upwards to form a supporting part, and the bottom of the volute extends downwards to form a supporting sleeve which is rotatably connected with the supporting part.

10. The air circulation device of claim 8, wherein: the switching cover is established with rotating the ground the circle of switching portion, actuating mechanism includes: the fifth gear is arranged on the outer ring of the adapter sleeve, the third driving motor is arranged on the supporting seat, the sixth gear is arranged on a main shaft of the third driving motor, and the sixth gear is meshed with the fifth gear.

11. The air circulation device of claim 9, wherein: the support sleeve is rotationally sleeved on the support part, and the driving mechanism comprises: the supporting sleeve comprises a seventh gear arranged on the outer ring of the supporting sleeve, a fourth driving motor arranged on the base and an eighth gear arranged on a main shaft of the fourth driving motor and meshed with the seventh gear.

12. An air purifier, comprising the air circulation device of any one of claims 1 to 7, further comprising a filter element and a bottom case; the filter element is arranged in the bottom shell, the supporting seat is arranged at the upper end of the bottom shell, the bottom surface of the supporting seat is in sealed fit with the top of the filter element, the air hole is communicated with the inner hole of the filter element, the bottom of the bottom shell is provided with a fitting part in sealed fit with the bottom of the filter element, and a plurality of air inlets are distributed in the side wall of the bottom shell.

13. An air purifier, comprising the air circulation device of any one of claims 1 and 8 to 11, and further comprising a filter element, wherein the filter element is arranged on the support base, and the bottom of the filter element covers the upper end of the air hole; the edge of the supporting seat extends upwards to form a cylinder, the filter element is accommodated in a cavity of the cylinder, and the side wall of the cylinder is provided with a plurality of air inlets respectively; the top of barrel is equipped with sealed lid, sealed lid is used for sealing the opening on the filter core.

14. The air circulation device of claim 13, wherein: the bottom of supporting seat still is equipped with the support casing, the fan with the spiral case accomodate with in the support casing, the lateral wall of support casing distributes and has a plurality of mouths of blowing.

15. An air humidifier, characterized by comprising the air circulation device of any one of claims 1 to 7, and further comprising an atomization device, wherein the support seat is arranged at the upper end of an air outlet of the atomization device.