CN212376939U - Fan assembly - Google Patents

Abstract

The utility model relates to a fan assembly, which comprises a shell, a fixed component, a synchronous motor, a first cross flow impeller, a second cross flow impeller, a first driving motor and a second driving motor, wherein the shell comprises a top shell, a bottom shell, a first middle shell and a second middle shell and defines a through hole; the fan assembly is characterized by further comprising a driving gear, a driven gear, a first meshing device and a second meshing device, wherein the first meshing device is fixed with the first middle shell, the second meshing device is fixed with the second middle shell, the driving gear is meshed with one of the first meshing device and the second meshing device, the driven gear is meshed with the other one of the first meshing device and the second meshing device, and the directions of rotation of the first middle shell and the second middle shell relative to the top shell are opposite. The utility model discloses a fan assembly has characteristics such as the better and output air current spatial distribution of outward appearance can change in an orderly manner when simple structure, swing.

Description

Fan assembly

Technical Field

The utility model relates to a fan assembly. In particular, but not exclusively, the invention relates to domestic fans for creating air circulation and airflow in a room, office or other domestic environment.

Background

The japanese applicant 20/12/2019 filed a patent application with application number 201911331056.4 to the patent office of the national intellectual property office, which claims a fan assembly, comprising a housing, and a synchronous motor, a first through-flow impeller, a second through-flow impeller, a first driving motor and a second driving motor which are positioned in the housing, wherein the first driving motor and the second driving motor respectively drive the first through-flow impeller and the second through-flow impeller to rotate; the shell comprises a top shell, a bottom shell, a first middle shell and a second middle shell and defines a through hole, the first middle shell and the second middle shell are both positioned between the top shell and the bottom shell and are separated by a certain distance, the first middle shell is provided with a plurality of first air inlets and a plurality of first air outlets and is fixed with a first volute and a first volute tongue, and the second middle shell is provided with a plurality of second air inlets and a plurality of second air outlets and is fixed with a second volute and a second volute tongue; the first cross flow impeller is positioned in the first middle shell, and the second cross flow impeller is positioned in the second middle shell; the fan assembly further comprises a fixing member for fixedly connecting the top casing and the bottom casing together; the synchronous motor comprises a first synchronous motor and a second synchronous motor, a rotating shaft of the first synchronous motor is parallel to a rotating shaft of the second synchronous motor, and the rotating direction of the first middle shell relative to the top shell is opposite to the rotating direction of the second middle shell relative to the top shell under the driving of the first synchronous motor and the second synchronous motor. Because the first synchronous motor and the second synchronous motor respectively drive the first middle shell and the second middle shell to rotate, the rotating speed of the first middle shell and the rotating speed of the second middle shell are often difficult to keep consistent, thereby influencing the appearance of the fan assembly during rotation or swing and being not beneficial to regularly changing the direction of output airflow.

Disclosure of Invention

An object of the utility model is to overcome the not enough among the prior art, provide a fan assembly that the outward appearance is better and can change output airflow direction regularly when having simple structure, swing.

In a first aspect, the present invention provides a fan assembly, which includes a housing, and a synchronous motor, a first cross-flow impeller, a second cross-flow impeller, a first driving motor and a second driving motor, which are located in the housing, wherein the first driving motor and the second driving motor respectively drive the first cross-flow impeller and the second cross-flow impeller to rotate; the scroll compressor is characterized in that the housing comprises a top housing, a bottom housing, a first middle housing and a second middle housing and defines a through hole, the first middle housing and the second middle housing are both positioned between the top housing and the bottom housing and are spaced apart, the first middle housing is provided with a plurality of first air inlets and a plurality of first air outlets and is fixed with a first scroll casing and a first scroll tongue, and the second middle housing is provided with a plurality of second air inlets and a plurality of second air outlets and is fixed with a second scroll casing and a second scroll tongue; the first cross flow impeller is positioned in the first middle shell, and the second cross flow impeller is positioned in the second middle shell; the fan assembly further comprises a fixing member for fixedly connecting the top casing and the bottom casing together; the first middle shell and the second middle shell can rotate relative to the top shell under the drive of the synchronous motor; air from outside the fan assembly can be drawn through the through-holes by the airflows output from the first and second air outlets; the fan assembly further comprises a driving gear arranged on a rotating shaft of the synchronous motor, a driven gear meshed with the driving gear, a first meshing device and a second meshing device, the first meshing device is fixed with the first middle shell, the second meshing device is fixed with the second middle shell, the driving gear is meshed with one of the first meshing device and the second meshing device, the driven gear is meshed with the other one of the first meshing device and the second meshing device, and under the driving of the synchronous motor, the rotating direction of the first middle shell relative to the top shell is opposite to the rotating direction of the second middle shell relative to the top shell.

The first driving motor and the second driving motor can be selectively fixed with the bottom shell; optionally, may be secured to the top housing. Preferably, the first drive motor and the second drive motor are both fixed to the bottom housing.

Preferably, the first drive motor does not follow the rotation of the first mid housing relative to the top housing, nor does the second drive motor follow the rotation of the second mid housing relative to the top housing.

Preferably, the first cross flow impeller does not follow the first intermediate casing for rotation relative to the top casing, nor does the second cross flow impeller follow the second intermediate casing for rotation relative to the top casing.

In the fan component, a synchronous driving mechanism consisting of a synchronous motor, a driving gear arranged on a rotating shaft of the synchronous motor, a driven gear meshed with the driving gear, a first meshing device and a second meshing device drives a first middle shell and a second middle shell to rotate relative to a top shell, and the ratio of the rotating speed of the first middle shell to the rotating speed of the second middle shell can be kept constant, so that the appearance of the fan component can be kept better when the fan component rotates or swings, the direction of output airflow can be regularly changed, and the fan component is driven by a single synchronous motor to have a simpler structure.

When the fan assembly swings for working, the first air inlet, the first air outlet, the first volute and the first volute tongue rotate relatively along with the first middle shell relative to the top shell, and the second air inlet, the second air outlet, the second volute and the second volute tongue also rotate relatively along with the second middle shell, so that the air outlet efficiency of the fan assembly is basically kept unchanged in the whole swinging process.

Generally, the diameter and the number of teeth of the driving gear are exactly the same as those of the driven gear. Preferably, the drive gear and the driven gear are both located between the first and second middle housings.

Preferably, the rotation shaft of the first middle housing rotating with respect to the top housing, the rotation shaft of the second middle housing rotating with respect to the top housing, the rotation shaft of the synchronous motor, and the rotation shaft of the driven gear are all located on the same plane. The structure is compact and has high synchronous driving efficiency.

Preferably, the first engagement means comprises a first rack and the second engagement means comprises a second rack.

Preferably, the first engagement means comprises a first toothed disc and the second engagement means comprises a second toothed disc.

Preferably, the first and second intermediate casings each comprise a cylindrical casing, more preferably both comprise cylindrical casings.

Typically, the securing member is located within the housing so that the overall fan assembly is more aesthetically pleasing. The securing member may also be located outside the housing, so that the structure inside the housing is simpler.

Preferably, the fixing member includes a first fixing member and a second fixing member.

In a preferred embodiment, the securing member comprises a first securing member and a second securing member, wherein the first securing member is located within the first mid-section housing and the second securing member is located within the second mid-section housing.

In another preferred embodiment, the fixation member comprises a first fixation member and a second fixation member, wherein both the first fixation member and the second fixation member are located outside the housing.

The fixing member may be of various structures, may be a fixing rod, or may be in other forms.

In a preferred embodiment, one of the first middle housing and the first fixing member is fixed with a first synchronous rotating shaft, the other of the first middle housing and the first fixing member is fixed with a first shaft sleeve, the first synchronous rotating shaft is positioned in the first shaft sleeve, and the first synchronous rotating shaft and the rotating shaft of the first through-flow impeller are positioned on the same straight line; and a second synchronous rotating shaft is fixed on one of the second middle shell and the second fixing component, a second shaft sleeve is fixed on the other one of the second middle shell and the second fixing component, and the second synchronous rotating shaft is positioned in the second shaft sleeve, wherein the second synchronous rotating shaft and the rotating shaft of the second cross-flow impeller are positioned on the same straight line.

Preferably, the first cross-flow impeller rotates in a direction opposite to that of the second cross-flow impeller, and air from outside the fan can be drawn through the through-holes by the air flows emitted from the first and second air outlets.

Preferably, the rotational speed of the first through-flow impeller is not equal to the rotational speed of the second impeller. This is advantageous in preventing resonance of the fan assembly.

Preferably, the first cross flow impeller and the second cross flow impeller are arranged in parallel at a distance. The rotational speed of the first and second through-flow impellers is typically between 500rpm and 4000rpm, preferably between 1200rpm and 3000 rpm. The first drive motor and the second drive motor may be dc brushless motors or ac motors.

Preferably, the synchronous motor includes a synchronous motor that can rotate in both forward and reverse directions. The synchronous motor can control the rotating direction thereof under the control of the control circuit, and can rotate in the positive direction or the negative direction.

The cross section of the through hole can be rectangular, runway-shaped or other shapes; the rectangle preferably comprises a rounded rectangle.

In order to enable the fan assembly to output a flow of hot air, heating means may be provided within the housing for heating the air flow.

In order to purify the air or to obtain clean air, a filter may also be provided in the housing for removing particles from the air flow.

In a second aspect, the present invention provides a fan assembly, which includes a housing, and a synchronous motor, a first cross-flow impeller, a second cross-flow impeller, a first driving motor and a second driving motor, which are located in the housing, wherein the first driving motor and the second driving motor respectively drive the first cross-flow impeller and the second cross-flow impeller to rotate; the first middle shell is provided with a plurality of first air inlets and a plurality of first air outlets and is fixed with a first volute and a first volute tongue, and the second middle shell is provided with a plurality of second air inlets and a plurality of second air outlets and is fixed with a second volute and a second volute tongue; the first cross flow impeller is positioned in the first middle shell, and the second cross flow impeller is positioned in the second middle shell; the fan assembly further comprises a fixing member for fixedly connecting the top casing and the bottom casing together; the first middle shell and the second middle shell can rotate for a certain angle relative to the top shell under the drive of the synchronous motor; air from outside the fan assembly can be drawn through the through-holes by the airflows output from the first and second air outlets; the fan assembly further comprises a driving gear, a first meshing device and a second meshing device, the driving gear, the first meshing device and the second meshing device are arranged on the rotating shaft of the synchronous motor, the first meshing device is fixed to the first middle shell, the second meshing device and the second middle shell are fixed to the second middle shell, the driving gear is meshed with the first meshing device and the second meshing device respectively, and the first middle shell and the second middle shell are driven by the synchronous motor to rotate in the same direction relative to the top shell.

In the second aspect of the present invention, the synchronous driving mechanism, which is composed of the synchronous motor, the driving gear disposed on the rotating shaft of the synchronous motor, the first engaging device and the second engaging device, drives the first middle housing and the second middle housing to rotate relative to the top housing, and the ratio of the rotation speed of the first middle housing to the rotation speed of the second middle housing can be kept constant, so that the appearance of the fan assembly can be kept good during rotation or oscillation, and the direction of the output airflow can be changed regularly.

Preferably, the drive gear is located between the first and second intermediate housings.

Preferably, the rotation shaft of the first middle housing rotating with respect to the top housing, the rotation shaft of the second middle housing rotating with respect to the top housing, and the rotation shaft of the synchronous motor are all located on the same plane. The structure is compact and has high synchronous driving efficiency.

Features of the first aspect of the invention may equally be applied to the second aspect of the invention and vice versa.

Drawings

Fig. 1 is a front schematic view of a fan assembly according to the present invention.

Fig. 2 is a rear view of the fan assembly shown in fig. 1.

Fig. 3 is a side view of the fan assembly of fig. 1.

Fig. 4 is a cross-sectional view of the fan assembly taken along line a-a in fig. 1.

Fig. 5 is a sectional view of the fan assembly taken along line B-B in fig. 3.

Fig. 6 is a sectional view of the fan assembly taken along line a-a of fig. 1 when the rotating shaft of the synchronous motor of fig. 5 is rotated to a certain position in a clockwise direction.

Fig. 7 is a sectional view of the fan assembly taken along line a-a of fig. 1 when the rotating shaft of the synchronous motor of fig. 5 is rotated to a certain position in a counterclockwise direction.

Fig. 8 shows an alternative construction of the fan assembly shown in fig. 5.

Detailed Description

Fig. 1 is a schematic view of a fan assembly according to the present invention, as viewed from the front of the fan assembly 100, fig. 2 is a rear view of the fan assembly shown in fig. 1, fig. 3 is a side view of the fan assembly shown in fig. 1, fig. 4 is a sectional view of the fan assembly taken along line a-a in fig. 1, and fig. 5 is a sectional view of the fan assembly taken along line B-B in fig. 3. As can be seen from fig. 1 to 5, the fan assembly 100 includes a housing 80 and a synchronous motor 13, a first crossflow impeller 9, a second crossflow impeller 10, a first drive motor 11 and a second drive motor 12 located within the housing 80.

In the present embodiment, the first drive motor 11 and the second drive motor 12 are both dc brushless motors; the synchronous motor 13 is a low-speed motor whose forward rotation and reverse rotation are controllable.

As best seen in fig. 1 and 2, the housing 80 includes a top housing 3, a bottom housing 4, a first middle housing 1 and a second middle housing 2, the housing 80 defining a through hole 50; the first middle shell 1 is positioned between the top shell 3 and the bottom shell 4, the second middle shell 2 is also positioned between the top shell 3 and the bottom shell 4, and the first middle shell 1 and the second middle shell 2 are separated by a certain distance; a plurality of first air inlets 7 and a plurality of first air outlets 5 are provided on the first mid housing 1, and a plurality of second air inlets 8 and a plurality of second air outlets 6 are provided on the second mid housing 2.

In the present embodiment, the first inlet port 7 and the second inlet port 8 are each in the form of circular holes having a diameter of about 3 mm; the first outlet 5 and the second outlet 6 are in the form of notches, the width of which is approximately 5 mm; the top housing 3, the bottom housing 4, the first middle housing 1 and the second middle housing 2 are all formed of plastic.

As can be seen in fig. 4 and 5, a first volute case 41 and a first volute tongue 43 are fixed on the inner wall of the first middle casing 1, and a second volute case 42 and a second volute tongue 44 are fixed on the inner wall of the second middle casing 2; the first cross flow impeller 9 is located in the first middle housing 1 and the second cross flow impeller 10 is located in the second middle housing 2. The first volute 41, the first volute tongue 43, the second volute 42 and the second volute tongue 44 of the present embodiment are all formed of plastic.

As can also be seen in fig. 4 and 5, a first sub-base 45 and a second sub-base 46 are provided inside the bottom casing 4; a first upper base 35 is arranged in the first middle housing 1, and the first upper base 35 is fixed with the inner wall of the top housing 3 through a first fixing shaft 23; a second upper base 36 is arranged in the second middle housing 2, and the second upper base 36 is fixed with the inner wall of the top housing 3 through a second fixing shaft 24; the first driving motor 11 is disposed in the first sub-mount 45, the flexible member 31 for absorbing vibration is disposed between the first driving motor 11 and the first sub-mount 45, the second driving motor 12 is disposed in the second sub-mount 46, and the flexible member 32 for absorbing vibration is disposed between the second driving motor 12 and the second sub-mount 46; the first drive motor 11 is connected to the first crossflow impeller 9 via a drive shaft 25, and the second drive motor 12 is connected to the second crossflow impeller 10 via a drive shaft 26; the upper end of the first crossflow impeller 9 has a first upper rotating shaft 21, the upper end of the second crossflow impeller 10 has a second upper rotating shaft 22, the first upper rotating shaft 21 is supported by a first bearing 19 arranged in a first upper base 35, and the second upper rotating shaft 22 is supported by a second bearing 20 arranged in a second upper base 36.

As can be seen from fig. 4 and 5, a first fixing member 39 is further provided in the first middle housing 1, a second fixing member 40 is further provided in the second middle housing 2, upper ends of the first and second fixing members 39 and 40 are fixed to the top housing 3, and lower ends of the first and second fixing members 39 and 40 are fixed to the bottom housing 4. Thus the top and bottom housings 3, 4 and the first and second fixing members 39, 40 are fixed together, thereby forming a stable structure; as is readily apparent from fig. 5, this robust structure carries the weight of the first drive motor 11, the second drive motor 12, the first through-flow impeller 9 and the second through-flow impeller 10. The first fixing member 39 and the second fixing member 40 of the present embodiment are straight rods, and the first fixing member 39 and the second fixing member 40 may have other shapes and structures according to the requirement, for example, the first fixing member and the second fixing member may be formed by connecting several segments of rods.

As can be seen from fig. 5, a first upper rotating disk 29 is fixed to the upper end portion of the first middle housing 1, the first upper rotating disk 29 having a shaft hole into which the first fixed shaft 23 extends and a passage through which the first fixed member 39 passes, the first upper rotating disk 29 being supported by a third bearing 37; similarly, a second upper rotating disk 30 is fixed to the upper end portion of the second middle housing 2, the second upper rotating disk 30 also has a shaft hole into which the second fixed shaft 24 extends and a passage through which the second fixed member 40 passes, and the second upper rotating disk 30 is supported by a fourth bearing 38; a synchronous motor 13 is arranged in the top shell 3, and a driving gear 15 fixed on a rotating shaft 61 of the synchronous motor 13 is meshed with a rack 17 fixed on the outer wall of the first middle shell 1; a driven gear 65 engaged with the driving gear 15 is further provided in the top casing 3, the driven gear 65 is rotatable around a fixed shaft 62 fixed to an inner wall of the top casing 3, and a support member 63 is further provided on the fixed shaft 62; the driven gear 65 meshes with a rack 18 fixed to the outer wall of the second middle housing 2.

In the present embodiment, a cable through hole (not shown) is provided in the bottom case 4, and the circuit device 60 is provided in the bottom case 4; the circuit device 60 is electrically connected to the first driving motor 11 and the second driving motor 12, respectively, to control the first driving motor 11 and the second driving motor 12 to drive the first cross flow impeller 9 and the second cross flow impeller 10 to rotate, respectively; the circuit device 60 is also electrically connected to the synchronous motor 13 to control a synchronous drive mechanism consisting of the synchronous motor 13, the drive gear 15, the driven gear 65, the rack 17 and the rack 18 to drive the first and second middle housings 1 and 2 to rotate relative to the top housing 3. Due to the adoption of meshing transmission, the ratio of the rotating speed of the first middle shell 1 to the rotating speed of the second middle shell 2 can be kept constant, so that the appearance of the fan assembly 100 can be kept better when the fan assembly rotates or swings, and the direction of the output airflow can be regularly changed; in addition, the structure is simpler by adopting a single synchronous motor to drive the synchronous motor.

As can be easily seen in fig. 4, the direction of rotation ω 1 of the first cross flow impeller 9 is opposite to the direction of rotation ω 2 of the second cross flow impeller 10, and air outside the fan assembly 100 can be drawn through the through hole 50 by the airflow emitted from the first air outlet 5 and the second air outlet 6. In fig. 4, the fan assembly 100 is in an original state where no swing operation is performed, and the air flows emitted from the first air outlet 5 and the second air outlet 6 are substantially in the same direction as the axis X.

Fig. 6 is a sectional view of the fan assembly taken along line a-a of fig. 1 when the rotating shaft of the synchronous motor of fig. 5 is rotated to a certain position in a clockwise direction. In fig. 6, the rotation direction ω 3 of the first middle housing 1 with respect to the top housing 3 is opposite to the rotation direction ω 4 of the second middle housing 2 with respect to the top housing 3, the rotation direction ω 3 of the first middle housing 1 is counterclockwise, the rotation direction ω 4 of the second middle housing 2 is clockwise, and then the air flow emitted from the first air outlet 5 flows generally toward the right front, and the air flow emitted from the second air outlet 6 flows generally toward the left front.

Fig. 7 is a sectional view of the fan assembly taken along line a-a of fig. 1 when the rotating shaft of the synchronous motor of fig. 5 is rotated to a certain position in a counterclockwise direction. In fig. 7, the rotation direction ω 3 of the first middle housing 1 with respect to the top housing 3 is also opposite to the rotation direction ω 4 of the second middle housing 2 with respect to the top housing 3, the rotation direction ω 3 of the first middle housing 1 is clockwise, and the rotation direction ω 4 of the second middle housing 2 is counterclockwise, and then the air flow emitted from the first air outlet 5 flows substantially toward the front left, and the air flow emitted from the second air outlet 6 flows substantially toward the front right.

As is readily apparent from fig. 6 and 7, the direction of the output airflow thereof can be regularly changed by the driving of the synchronous motor 13.

Fig. 8 shows an alternative construction of the fan assembly shown in fig. 5. As can be readily seen from fig. 8, the second embodiment shown in fig. 8 is similar to the first embodiment except for the synchronous drive configuration. In the present embodiment, the synchronous drive mechanism is constituted by the synchronous motor 13, the drive gear 15 provided on the rotating shaft 61 of the synchronous motor, the rack 17, and the rack 18, and the driven gear 65 in the first embodiment is omitted. In the present embodiment, the driving gears 15 are engaged with the rack gears 17 and 18, respectively, so that the first middle housing 1 can be rotated with respect to the top housing 3 in the same direction as the second middle housing 2 can be rotated with respect to the top housing 3 by the synchronous motor 13.

While there have been shown and described what are at present considered to be the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (10)

1. A fan assembly comprises a shell, and a synchronous motor, a first cross-flow impeller, a second cross-flow impeller, a first driving motor and a second driving motor which are positioned in the shell, wherein the first driving motor and the second driving motor respectively drive the first cross-flow impeller and the second cross-flow impeller to rotate and work; the scroll compressor is characterized in that the housing comprises a top housing, a bottom housing, a first middle housing and a second middle housing and defines a through hole, the first middle housing and the second middle housing are both positioned between the top housing and the bottom housing and are spaced apart, the first middle housing is provided with a plurality of first air inlets and a plurality of first air outlets and is fixed with a first scroll casing and a first scroll tongue, and the second middle housing is provided with a plurality of second air inlets and a plurality of second air outlets and is fixed with a second scroll casing and a second scroll tongue; the first cross flow impeller is positioned in the first middle shell, and the second cross flow impeller is positioned in the second middle shell; the fan assembly further comprises a fixing member for fixedly connecting the top casing and the bottom casing together; the first middle shell and the second middle shell can rotate relative to the top shell under the drive of the synchronous motor; air from outside the fan assembly can be drawn through the through-holes by the airflows output from the first and second air outlets; the fan assembly further comprises a driving gear arranged on a rotating shaft of the synchronous motor, a driven gear meshed with the driving gear, a first meshing device and a second meshing device, the first meshing device is fixed with the first middle shell, the second meshing device is fixed with the second middle shell, the driving gear is meshed with one of the first meshing device and the second meshing device, the driven gear is meshed with the other one of the first meshing device and the second meshing device, and under the driving of the synchronous motor, the rotating direction of the first middle shell relative to the top shell is opposite to the rotating direction of the second middle shell relative to the top shell.

2. The fan assembly of claim 1 wherein the first and second engagement means each comprise a rack.

3. The fan assembly of claim 1 wherein the first engagement means comprises a first toothed disk and the second engagement means comprises a second toothed disk.

4. The fan assembly as claimed in claim 1, wherein the driving gear has a diameter and has a number of teeth identical to those of the driven gear.

5. The fan assembly of claim 1 wherein the drive gear and the driven gear are both located between the first mid-section housing and the second mid-section housing.

6. The fan assembly of claim 1, wherein the rotational shaft of the first middle housing that rotates relative to the top housing, the rotational shaft of the second middle housing that rotates relative to the top housing, the rotational shaft of the synchronous motor, and the rotational shaft of the driven gear are all located on the same plane.

7. A fan assembly as claimed in any one of claims 1 to 6, wherein a fixing member is located within the housing.

8. A fan assembly as claimed in any one of claims 1 to 6, wherein the fixing member is located outside the casing.

9. The fan assembly of any of claims 1 to 6, wherein the securing member comprises a first securing member and a second securing member, wherein the first securing member is located within the first mid-section housing and the second securing member is located within the second mid-section housing.

10. The fan assembly of any of claims 1 to 6, wherein the first drive motor does not follow the rotation of the first mid-housing relative to the top housing, and the second drive motor does not follow the rotation of the second mid-housing relative to the top housing.

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