CN202402343U - Impeller structure of exhaust fan - Google Patents

Abstract

The utility model provides an impeller structure of exhaust fan, it is inside motor and the impeller of being equipped with of exhaust fan, this motor has a drive shaft and this impeller montage, this impeller includes the rim plate, the rim plate and be a plurality of blades that the radiation arrangement located between this rim plate and this rim plate, this rim plate peripheral diameter is greater than this rim plate peripheral diameter, the extending direction of definition this drive shaft is the axis, this rim plate periphery is equipped with a point, this rim plate peripheral extension of this a point parallel has a baseline, this rim plate peripheral is equipped with b point and connects into a notional line with a point, make the baseline, notional line and three-way coplane of axis, then the baseline forms the contained angle of 15 degrees to 80 degrees with the notional line in a point intersection, in order to reach the mesh that reduces this exhaust fan function windage and reduce wind and cut the noise.

Description

Exhaust fan impeller structure

technical field

The utility model relates to an impeller structure of an exhaust fan, in particular to reducing the wind resistance and noise of the exhaust fan by using the impeller structure to make the air flow flow along the air outlet.

Background technique

A general exhaust fan 10 is shown in Figure 1, the exhaust fan 10 has a housing 11 and a motor 12 and an impeller 13 located inside the housing 11, the impeller 13 has a round cover 131 and a round disc 132, A plurality of radially arranged blades 133 are arranged between the wheel cover 131 and the circumference of the wheel disc 132, an opening 1311 is provided in the center of the wheel cover 131, and the motor 12 has a drive shaft 121 and the wheel disc 132 set of Then, the extension direction of the driving shaft 121 is defined as an axial direction X, the housing 11 is provided with an air inlet 111 and an air supply outlet 112 at both ends of the axial direction X, and the opening 1311 of the wheel cover 131 of the impeller 13 Towards the air inlet 111, the inside of the impeller 13 communicates with the outside of the housing 11;

The exhaust fan 10 uses the motor 12 to drive the impeller 13 to rotate rapidly to generate centrifugal force, so that the blades 133 of the impeller 13 disturb the air and centrifugally throw it between the impeller 13 and the housing 11, and the central space of the impeller 13 forms a low-pressure environment due to the reduction of air at the same time. The external air is input into the air inlet 111 of the exhaust fan 10 and output toward the air outlet 112 to achieve the exhaust effect.

However, the ordinary exhaust fan 10 has the problem of large air supply resistance. Referring to FIG. 1, the impeller 13 rotates at a high speed to throw the input air out to form a centrifugal airflow between its peripheral side and the casing 11. The centrifugal air flow must first flow along the shape of the blade 133, and then be thrown out by the impeller 13 in a path nearly perpendicular to the axial direction X to contact the inner wall of the housing 11, and finally cooperate with the input air flow to flow along the inner wall of the housing 11 toward the air outlet 112. At this time, Because the wheel disc 132 of the common exhaust fan 10 has the same diameter as the wheel cover 131, before the centrifugal air flow changes its flow direction, it flows in a flow path close to the inner wall of the housing 11, thus causing the common exhaust fan 10 to run with a large wind resistance. The situation not only directly affects the operating efficiency of the exhaust fan 10, but also indirectly causes problems such as obvious wind shear noise of the ordinary exhaust fan 10;

In order to overcome the above disadvantages, the utility model provides an impeller structure of an exhaust fan.

Utility model content

The main purpose of this utility model is to provide an impeller structure of an exhaust fan. The diameter of the periphery of the wheel cover of the impeller is larger than the diameter of the periphery of the wheel disk, and the distance between the periphery of the wheel cover and the periphery of the wheel disk is 15 degrees to 80 degrees. The included angle makes the centrifugal airflow easy to flow towards the air outlet of the exhaust fan, and greatly reduces the contact of the centrifugal airflow with the wall of the shell in a nearly vertical flow direction, so as to reduce the operating wind resistance of the exhaust fan and increase the operation of the exhaust fan. efficiency and reduce wind shear noise.

In order to achieve the above purpose, the utility model provides an impeller structure of an exhaust fan, mainly a motor and an impeller are arranged inside the housing of an exhaust fan, the motor has a drive shaft and is assembled with the impeller, and the impeller includes a round A disc, a wheel cover, and a plurality of blades arranged radially between the wheel disc and the wheel cover, wherein the peripheral diameter of the wheel cover is larger than the peripheral diameter of the wheel disc, and the axis defining the drive shaft extends as an axis , there is a point a on the periphery of the roulette, a point b on the periphery of the wheel cover, a baseline extends from the point a parallel to the periphery of the roulette, the point a and the point b are connected to form an imaginary line, so that the baseline, the imaginary If the line and the axis are on the same plane, then the baseline and the imaginary line intersect at the point a to form an included angle ranging from 15 degrees to 80 degrees.

An impeller structure of an exhaust fan, mainly an impeller is arranged inside a housing of an exhaust fan, the housing is provided with an air inlet and an air supply port, and a motor is provided inside the housing to drive the impeller, wherein, The impeller includes:

A wheel disk has a periphery and an impeller wheel housing is provided in the center to be combined with a drive shaft of the motor, a point a is defined on the periphery of the wheel disk, a base line extends from the point a parallel to the periphery of the wheel disk, and the The axis of the drive shaft extends into an axis;

A wheel cover has a peripheral edge and is formed with an air inlet, so that the wheel cover is arranged with its air inlet corresponding to the air inlet of the housing, the diameter of the wheel cover periphery is larger than the diameter of the wheel disk periphery, and a point b is defined at the On the periphery of the wheel cover, the point a and the point b are connected to form an imaginary line, and the base line, the imaginary line and the axis are on the same plane, and the base line and the imaginary line intersect at the point a to form an angle of 15 degrees to 80 degrees an angle of

A plurality of blades are radially arranged and arranged between the wheel disc and the wheel cover.

The above-mentioned impeller structure of the exhaust fan, wherein, the included angle between the base line of the impeller and the imaginary line is 40° to 60°.

An impeller structure of an exhaust fan, wherein the included angle between the base line of the impeller and an imaginary line is 58 degrees.

An impeller structure of an exhaust fan, in which a plurality of clamping openings are provided at the junction of the disc, the wheel cover and the vane, and the vane has a front side edge formed with a plurality of clamping recesses to engage with the disc The opening is positioned and assembled, and the blade has a rear side edge formed with a plurality of locking recesses and the wheel cover locking opening is positioned and assembled.

An impeller structure of an exhaust fan, wherein, the plurality of blades are in the shape of curved arcs, and each blade has two side edges, one side edge is a front side edge assembled with the wheel disc, and the other side edge is a The rear side edge is assembled with the wheel cover, and the blade has two ends, one end edge is an inner edge adjacent to the center of the impeller, and the other end edge is an outer edge adjacent to the wheel disc and the periphery of the wheel cover, And the outer edge of the blade is arc-shaped to connect the periphery of the wheel disc and the periphery of the wheel cover.

An impeller structure of an exhaust fan, wherein, the center of the impeller wheel shell is provided with a shaft hole fixedly assembled with a drive shaft of the motor.

Description of drawings

Fig. 1 is a schematic diagram of the combined structure of a common exhaust fan housing and impeller.

Fig. 2 is a schematic diagram of the combined structure of the exhaust fan housing and the impeller of the utility model.

Fig. 3 is a three-dimensional structural schematic view of the impeller of the utility model viewed from the wheel disk.

Fig. 4 is a three-dimensional schematic view of the impeller of the utility model viewed from the wheel cover.

Fig. 5 is a structural schematic diagram of the utility model with an included angle of the impeller of about 55 degrees to 60 degrees.

Fig. 6 is a structural schematic diagram of the utility model with an included angle of the impeller of about 65 degrees to 70 degrees.

Fig. 7 is a structural schematic diagram of the utility model with an included angle of about 45 degrees for the impeller.

Explanation of reference signs

"ordinary"

10 is the exhaust fan 11 is the housing

12 is the motor 121 is the drive shaft

13 is the impeller 131 is the wheel cover

132 is the roulette 133 is the blade

1311 is the opening 111 is the air inlet

112 is the air outlet

X is the axis

"The utility model"

A is the exhaust fan B is the shell

B1 is the air inlet B2 is the air supply port

C is the motor C1 is the drive shaft

D is the impeller

20 is roulette 21 is peripheral

22 is the impeller shell 221 is the shaft hole

23 is card mouth

30 is the wheel cover 31 is the periphery

32 is the air inlet 33 is the clamping port

40 is the blade 41 is the front edge

411 is the clamping recess 42 is the rear side edge

421 is the clamping recess 43 is the inner edge

44 is the outer edge

d1 is the diameter of the periphery of the wheel d2 is the diameter of the periphery of the wheel cover

point a point b point

L1 is the baseline L2 is the imaginary line

L3 is the axis θ is the included angle

Detailed ways

Embodiments of the present utility model are hereby described in detail in conjunction with the accompanying drawings:

First of all, with reference to Fig. 2 in conjunction with Fig. 3, 4 and 5, the preferred embodiment of the impeller structure of an exhaust fan provided by the utility model is mainly that an impeller D is arranged inside a housing B of an exhaust fan A , the shell B is provided with an air inlet B1 and an air supply port B2, a motor C is provided inside the shell B to drive the impeller D, and the impeller D includes a wheel disc 20, a wheel cover 30 and a plurality of The blade 40 between the wheel disc 20 and the wheel cover 30, wherein:

The wheel disc 20 has a peripheral edge 21 for guiding an air flow input from the air inlet B1 of the exhaust fan A casing B to flow towards the air supply port B2 of the exhaust fan A casing B, and an impeller wheel housing 22 is arranged in the center The center of the impeller shell 22 is provided with a shaft hole 221 fixedly assembled with a drive shaft C1 of the motor C, so that the motor C drives the impeller D to rotate. ; As shown in Figures 2 and 5, a point a is defined at the periphery 21 of the wheel 20, a base line L1 extends from the point a parallel to the periphery 21 of the wheel 20, and the axis of the drive shaft C1 extends as an axis L3;

The wheel cover 30 has a peripheral edge 31 and is formed with an air inlet 32, so that the wheel cover 30 is set with its air inlet 32 corresponding to the air inlet B1 of the housing B, and the end surface of the wheel cover 30 is provided with a plurality of clamping openings 33 , as shown in Figures 2 and 5, the diameter d2 of the periphery 31 of the wheel cover 30 is greater than the diameter d1 of the periphery 21 of the wheel disk 20, and a point b is defined on the periphery 31 of the wheel cover 30, and the point a and the point b are connected to form an imaginary Line L2, and the baseline L1, the imaginary line L2 and the axis L3 are located on the same plane, and the intersection of the baseline L1 and the imaginary line L2 at the point a forms an included angle θ of 15 degrees to 80 degrees;

The plurality of blades 40 are radially arranged between the wheel disc 20 and the wheel cover 30 as shown in FIGS. It is a front side edge 41, and the front side edge 41 is formed with a plurality of locking recesses 411 to be positioned and assembled with the locking opening 23 of the wheel 20, and the other side edge is a rear side edge 42, and the rear side edge 42 is formed A plurality of clamping recesses 421 are positioned and assembled with the clamping opening 33 of the wheel cover 30, and the blade 40 has two ends, one end edge is an inner end edge 43 adjacent to the center of the impeller D, and the other end edge is an inner edge adjacent to the center of the impeller D. The outer edge 44 of the wheel disc 20 and the peripheral edge 21, 31 of the wheel cover 30, and the outer edge 44 of the blade 40 forms an arc connecting the peripheral edge 21 of the wheel disc 20 and the peripheral edge 31 of the wheel cover 30;

In this way, the airflow flows through the air inlet B1 of the exhaust fan A housing B, the air inlet 32 of the wheel cover 30, and the blade 40 and then flows along the periphery 21 of the wheel disk 20, so as to reduce the air flow and the exhaust fan A housing. The wind resistance of the inner wall of B.

The low wind resistance impeller of the exhaust fan of the present utility model defines the diameter d2 of the periphery 31 of the wheel cover 30 and the diameter d1 of the periphery 21 of the flow guide 20 by the included angle θ between the periphery 31 of the wheel cover 30 and the periphery 21 of the flow guide 20 Relative relationship, wherein, when the included angle θ is greater than 80 degrees, the diameter d2 of the peripheral edge 31 of the wheel cover 30 is quite close to the diameter d1 of the peripheral edge 21 of the flow guide 20, and it is difficult to effectively achieve the purpose of reducing the wind resistance of the present invention;

In addition, the smaller the included angle θ is, the larger the difference between the diameter d2 of the wheel cover 30 and the diameter d1 of the air guide 20 is, and the greater the reduction in wind resistance is. However, when the included angle θ is less than 15 degrees, the air guide 20 The difference between the diameter d1 of the peripheral edge 21 and the diameter d2 of the peripheral edge 31 of the wheel cover 30 is very large, forming the shape of the impeller D in which the area of the flow guide 20 is much smaller than that of the wheel cover 30. Since the impeller D passes through the flow guide 20 and the drive shaft of the motor C C1 is assembled and rotated under force, and when the small-area flow guide 20 drives the entire impeller D to rotate at high speed, it is prone to vibration and irregular rotation, so the included angle θ is defined as 15 degrees to 80 degrees;

Among them, the impeller D of the utility model has a preferred angle θ angle range of 45 degrees to 60 degrees, and an angle θ angle of 58 degrees is the best; as shown in Figure 5, it is shown that the impeller D has an angle θ of about 55 degrees. 60 degrees to 60 degrees, and as shown in Figure 6, it shows that the impeller D has a structure diagram with an angle θ of about 65 degrees to 70 degrees, and Figure 7 shows that the impeller D has a structure diagram with an angle θ of about 45 degrees .

The above is the description of the main components and configurations of the embodiment of the present invention. As for the operation mode and effect of the preferred embodiment of the present invention, the following description will be made.

Referring to Fig. 2 in conjunction with Fig. 5, when the impeller D is driven by the motor C and rotates at high speed, the air input into the exhaust fan A is thrown out by the impeller D to form an airflow flowing along the centrifugal path. Since the diameter d2 of the periphery 31 of the wheel cover 30 is larger than that The diameter d1 of the periphery 21 of the flow member 20 shortens the length of the flow path of the centrifugal air flow inside the impeller D that is adjacent to the flow guide member 20, that is, increases the path length of the centrifugal air flow leaving the impeller D and then flows to the inner wall of the housing B, thereby allowing the centrifugal When the airflow is centrifugally leaving the impeller D, it is driven by the input airflow to quickly change the flow direction to reduce the friction with the shell B, so as to greatly reduce the problems of wind resistance and wind shear noise, and at the same time improve the operation efficiency of the exhaust fan A.

Claims (6)

1. An impeller structure of an exhaust fan, mainly an impeller is arranged inside a housing of an exhaust fan, the housing is provided with an air inlet and an air supply port, and the housing is internally provided with a motor for driving the impeller, It is characterized in that: the impeller includes: A wheel disc has a periphery and an impeller wheel housing is provided in the center to be combined with a drive shaft of a motor driving the impeller, a point a is defined on the periphery of the wheel disc, and a base line extends from the point a parallel to the periphery of the wheel disc , and the axis of the drive shaft extends into an axis; A wheel cover has a peripheral edge and is formed with an air inlet, so that the wheel cover is arranged with its air inlet corresponding to the air inlet of the housing, the diameter of the wheel cover periphery is larger than the diameter of the wheel disk periphery, and a point b is defined at the On the periphery of the wheel cover, the point a and the point b are connected to form an imaginary line, and the base line, the imaginary line and the axis are on the same plane, and the base line and the imaginary line intersect at the point a to form an angle of 15 degrees to 80 degrees an angle of A plurality of blades are radially arranged and arranged between the wheel disc and the wheel cover. 2 . The impeller structure of the exhaust fan according to claim 1 , wherein the angle between the base line of the impeller and the imaginary line is 40° to 60°. 3. The impeller structure of the exhaust fan according to claim 1, characterized in that: the included angle between the base line of the impeller and the imaginary line is 58 degrees. 4. The impeller structure of an exhaust fan according to claim 1, wherein a plurality of clamping openings are provided at the junction of the wheel disc, the wheel cover and the blade, and the blade has a front side edge formed with multiple A locking recess is positioned and assembled with the locking opening of the wheel disc, and the blade has a rear side edge formed with a plurality of locking recesses that are positioned and assembled with the locking opening of the wheel cover. 5. The impeller structure of an exhaust fan as claimed in claim 1, wherein the plurality of blades are in the shape of curved arcs, and each of the blades has two side edges, and one side edge is a front side edge and the wheel disk Assembling, the other side edge is a rear side edge assembled with the wheel cover, and the blade has two ends, one end edge is an inner end edge adjacent to the center of the impeller, and the other end edge is adjacent to the wheel disc and The outer edge of the periphery of the wheel cover, and the outer edge of the blade forms an arc to connect the periphery of the wheel disc and the periphery of the wheel cover. 6 . The impeller structure of an exhaust fan according to claim 1 , wherein a shaft hole is fixedly assembled with a drive shaft of the motor in a central recess of the impeller housing. 7 .

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