TW201831790A - An impeller, impeller assembly and fan wheel thereof - Google Patents

Abstract

An impeller is provided for overcoming problems of high power waste and low operational efficiency of conventional dual inlet impeller. The impeller of the present disclosure includes a housing, a fan wheel, and a motor. The housing has a first inlet, a second inlet, and an outlet, and a receiving room inside the housing communicates with said two inlets and the outlet. The fan wheel has a base including a first surface facing the first inlet and a second surface facing the second inlet, a first blade set on the first surface of the base, and a second blade set on the second surface of the base. In the axial direction of the fan wheel, the height of the first blade set is higher than that of the second blade set. Furthermore, the base has no through hole from the first surface to the second surface in a portion between a coupling part to a radially outer edge of the base.

Description

   Drum fan, drum fan assembly and fan wheel   

The invention relates to a blower fan, a blower fan assembly and a fan wheel thereof, and in particular to a blower fan capable of effectively feeding air in both directions to increase the driving force even at a low axial height.

U.S. Publication No. 8,550,066 discloses a conventional dual-inlet fan, wherein the fan has a housing, a motor, and a fan. The casing has a first air inlet and a second air inlet respectively located on two opposite surfaces, and an air outlet is formed on a side wall connecting the two opposite surfaces; the motor extends into the shell from the first air inlet The fan wheel is located in the casing and coupled to a driving shaft of the motor, so that when the fan wheel rotates, air is drawn from the first and second air inlets to form an air flow.

However, since most of the area of the first air inlet of the housing has been shielded by the motor, the efficiency of the draft of the first air inlet is obviously lower than that of the second air inlet that is not shielded by the motor. In other words, due to the drop in the effect of the two air inlets on the suction effect, if the fan wheel is not specifically designed according to the ventilation area of each air inlet, it is easy to waste driving power due to the small area of the first air inlet, or it may be possible In order to accommodate the air intake volume of the first air inlet, the air-drawing effect of the second air inlet is reduced, which results in poor efficiency of the blower fan. Moreover, if the fan wheel does not properly plan the flow direction of the airflow entering the casing from the two air inlets, it may also cause turbulence and affect the efficiency of wind drive. Therefore, there is still a need to improve such conventional blowers.

In order to solve the above problems, the present invention provides a blower fan and a blower fan assembly to avoid situations such as wasted driving power or poor driving efficiency, thereby greatly improving driving efficiency, thereby providing greater air output or further reducing Overall axial height.

The fan of the present invention includes a casing, a fan, and a motor. The casing has a first air inlet, a second air inlet, and an air outlet, and a container chamber in the casing communicates with the two air inlets and the air outlet. The fan wheel has a substrate including a first surface, a second surface, a radial outer periphery and a joint portion. The first surface faces the first air inlet, and the second surface faces the second air inlet. A radial outer peripheral edge connects the first surface and the second surface, the joint portion is used to join the rotating shaft, and a portion of the substrate extending from the joint portion to the radial outer peripheral portion does not have any penetration through the first surface and the first surface. Perforations on two surfaces, a first blade group and a second blade group are respectively provided on the first and second surfaces, and in the axial direction of the fan wheel, the height of the first blade group is greater than that of the second blade group height. The motor is coupled to the casing and extends into the accommodating chamber through the second air inlet. The motor has a rotating shaft coupled to the substrate. According to this, the blower fan of the present invention can greatly improve the driving efficiency, thereby providing a larger air volume or further reducing the overall axial height, and has the effect of reducing the possibility of turbulence generation.

Wherein, the first air inlet and the second air inlet are arranged along the axial direction on two end walls of the housing, and the air outlet is provided on a side wall between the two end walls.

The height of the first blade group is 1.5 to 2.5 times the height of the second blade group; the structure has the effect of avoiding situations such as wasted driving power or poor wind drive efficiency.

The first air inlet has a first air inlet area, and the second air inlet has a second air inlet area between the periphery of the second air inlet and the motor. The first air inlet area is larger than the second air inlet area.

Wherein, the first air inlet includes a plurality of sub-air inlets, and the sub-air inlets collectively constitute a first air inlet area, and there is a second air inlet area between the periphery of the second air inlet and the motor. The air intake area is larger than the second air intake area.

Wherein, the height of the first blade group divided by the height of the second blade group is a first ratio, and the first air intake area divided by the second air intake area is a second ratio. The first ratio It is 0.5 to 1.5 times the second ratio; the structure has the effect of providing an appropriate blade group height according to the air inlet area of each air inlet.

Wherein, the first blade group has a plurality of first blades, the second blade group has a plurality of second blades, and the plurality of first blades are disposed offset from the plurality of second blades in the axial direction.

Wherein, the first blade group has a plurality of first blades, and the fan wheel further has a reinforcing ring connected to a side of the plurality of first blades away from the substrate; the structure has a structure to reinforce the fan wheel near the first blade group The effect of structural strength.

The fan wheel of the fan of the present invention includes a base plate, a first blade group and a second blade group. The substrate has a first surface, a second surface, a radial outer periphery, and a joint portion. The first and second surfaces are opposite to each other. The radial outer periphery connects the first surface and the second surface. The combining portion is located at the rotation center of the substrate for combining a rotating shaft; the first blade group is disposed on the first surface of the substrate; and the second blade group is disposed on the second surface of the substrate. Wherein, in the axial direction of the fan wheel, the height of the first blade group is greater than the height of the second blade group, and the portion of the substrate extending from the joint portion to the radial outer periphery does not have any penetration through the first Perforations on the surface and the second surface. According to this, the fan wheel of the present invention can greatly improve the driving efficiency, thereby providing a larger air output for the fan provided with the fan wheel or further reducing the overall axial height, and reducing the possibility of turbulence. efficacy.

The height of the first blade group is 1.5 to 2.5 times the height of the second blade group; the structure has the effect of avoiding situations such as wasted driving power or poor wind drive efficiency.

The first blade group has a plurality of first blades, the second blade group has a plurality of second blades, and the plurality of first blades are disposed offset from the plurality of second blades in the axial direction.

Wherein, the first blade group has a plurality of first blades, and the fan wheel further has a reinforcing ring connected to a side of the plurality of first blades away from the substrate; the structure has a structure for reinforcing the fan wheel near the first blade group. The effect of structural strength.

The fan fan assembly of the present invention includes two fan wheels, a casing and a motor. Two fan wheels, each of which is the fan wheel of the aforementioned fan, and the second surface of the two fan wheels is opposite. The casing has a first container room and a second container room respectively for the two fans, an air outlet is connected to the first and second container rooms, and at least four air inlets respectively pass through the first container room or the second container room. The second receiving chamber communicates with the air outlet. The motor is coupled to the casing and extends into the first and second accommodating chambers respectively from two of the at least four air inlets. Two coaxial shafts of the motor are respectively connected to the two fan wheels. According to this, the fan fan assembly of the present invention can greatly improve the driving efficiency, thereby providing a larger air output or further reducing the overall axial height.

The at least four air inlets include a first air inlet, a second air inlet, a third air inlet, and a fourth air inlet. The first and second air inlets communicate with the first chamber. The third air inlet and the fourth air inlet communicate with the second chamber, wherein the second and fourth air inlets are located between the first and third air inlets, and the motor is provided by the second and fourth air inlets. Air outlets extend into the first and second accommodating chambers, respectively.

     〔this invention〕     

1‧‧‧ shell

1a‧‧‧shell

1b‧‧‧shell

11‧‧‧ end wall

12‧‧‧ end wall

13‧‧‧ sidewall

14‧‧‧first air inlet

15‧‧‧second air inlet

16‧‧‧outlet

17‧‧‧Capacity Room

1’‧‧‧shell

1a’‧‧‧shell

1b’‧‧‧shell

1c’‧‧‧shell

1d’‧‧‧shell

11’‧‧‧ end wall

11 ”‧‧‧ end wall

12’‧‧‧ end wall

12 "‧‧‧ end wall

13’‧‧‧ sidewall

13 "‧‧‧ sidewall

14’‧‧‧first air inlet

14 ”‧‧‧third air inlet

15’‧‧‧second air inlet

15 ”‧‧‧Fourth air inlet

16’‧‧‧outlet

17’‧‧‧first container

17 ”‧‧‧Second Room

2‧‧‧ fan wheel

21‧‧‧ substrate

211‧‧‧first surface

212‧‧‧Second Surface

213‧‧‧Radial outer periphery

214‧‧‧Combination

22‧‧‧The first blade group

221‧‧‧first blade

23‧‧‧Second Blade Group

231‧‧‧Second Blade

24‧‧‧ Strengthening Ring

3‧‧‧ Motor

31‧‧‧Shaft

3’‧‧‧Motor

31’‧‧‧Shaft

31 ”‧‧‧rotating shaft

A1‧‧‧First inlet area

A2‧‧‧Second inlet area

H1‧‧‧ height

H2‧‧‧ height

Figure 1: An exploded perspective view of a fan according to a preferred embodiment of the present invention.

Fig. 2: A sectional view of a fan according to a preferred embodiment of the present invention.

Fig. 3: A perspective view of a fan wheel of a fan according to a preferred embodiment of the present invention.

FIG. 4 is a sectional view of a fan wheel of a preferred embodiment of the present invention.

FIG. 5 is a schematic diagram of a first air inlet area and a second air inlet area of a fan according to a preferred embodiment of the present invention.

FIG. 6 is an exploded perspective view of a fan fan assembly according to a preferred embodiment of the present invention.

FIG. 7 is an assembled sectional view of a fan fan assembly according to a preferred embodiment of the present invention.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following describes the preferred embodiments of the present invention in detail with the accompanying drawings, as follows: Please refer to Figs. 1 and 2, This is a preferred embodiment of the fan of the present invention. The fan includes a casing 1, a fan 2 and a motor 3. The fan 2 is accommodated in the casing 1. The motor 3 is coupled to the fan 2 through the casing 1 to drive the fan. The wheel 2 rotates inside the casing 1 to drive wind.

The casing 1 is preferably composed of two shells 1a, 1b, and the casing 1 includes two end walls 11, 12 and a side wall 13, which are opposite to each other in the axial direction. The side wall 13 is connected to the two end walls 11, 12 and is located at Between the two end walls 11,12. As shown in Fig. 1, when the casing 1 is composed of two shells 1a, 1b, the two end walls 11, 12 are preferably located in the two shells 1a, 1b, respectively, and the side wall 13 is formed by the two shells. 1a and 1b are composed together, but the casing 1 is not limited to be constructed in the above-mentioned structure. The housing 1 further has a first air inlet 14, a second air inlet 15, and an air outlet 16. The first air inlet 14 penetrates one of the two end walls 11, 12 and the second air inlet 15 penetrates. The other of the two end walls 11 and 12, and the air outlet 16 penetrates the side wall 13. As a result, the casing 1 forms an accommodating chamber 17 inside, and the accommodating chamber 17 communicates with the two air inlets 14 and 15 and the air outlet 16.

The fan wheel 2 is accommodated in a receiving chamber 17 of the casing 1, and the fan wheel 2 includes at least a base plate 21, a first blade group 22 and a second blade group 23. The base plate 21 is used to form a hub structure of the fan wheel 2 to be coupled to the motor 3, and the base plate 21 may be in a form having a central convex portion and an outer ring piece as shown in Figs. 1 and 2, but it may also be The shape of a flat plate having only a single surface height is not limited thereto. In addition, the substrate 21 has a first surface 211, a second surface 212, a radial outer periphery 213, and a joint portion 214 facing away from each other. The first surface 211 faces the first air inlet 14, The second surface 212 faces the second air inlet 15, the radial outer periphery 213 is connected to the two surfaces 211 and 212, and the joint portion 214 is for connecting the motor 3 and is preferably located at the center of rotation of the substrate 21. . Among them, in order to avoid turbulence between the air currents driven by the blade groups 22 and 23 of the fan wheel 2, the portion of the substrate 21 extending from the joint portion 214 to the radial outer peripheral edge 213 preferably does not have any penetration. The first surface 211 and the second surface 212 are perforated.

As shown in FIGS. 2 to 4, the first blade group 22 is disposed on the first surface 211 of the substrate 21, and the first blade group 22 has a height H1 in the axial direction of the fan wheel 2; the second blade The group 23 is disposed on the second surface 212 of the substrate 21, and the second blade group 23 also has a height H2 in the axial direction of the fan wheel 2. The height H1 of the first blade group 22 is greater than the height H2 of the second blade group 23, which means that the first blade group 22 extends from the substrate 21 toward the first air inlet 14 and the second blade The group 23 extends from the base plate 21 toward the second air inlet 15, and the length extended by the first blade group 22 is greater than the length extended by the second blade group 23. As a result, when the fan wheel 2 rotates, the first blade group 22 and the second blade group 23 can draw different air volumes from the first air inlet 14 and the second air inlet 15, respectively, and from the first The amount of air drawn by the air inlet 14 is greater than the amount of air drawn from the second air inlet 15. More specifically, the first blade group 22 includes a plurality of first blades 221, the second blade group 23 includes a plurality of second blades 231, and the aforementioned heights H1 and H2 may refer to the first plurality of first blades 231, respectively. The extending length of the blade 221 and the plurality of second blades 231 in the axial direction of the fan wheel 2. The plurality of first blades 221 and the plurality of second blades 231 can be aligned with each other in the axial direction of the fan wheel, but they can also be offset. In addition, the fan wheel 2 may further have a reinforcing ring 24 connected to a side of the plurality of first blades 221 away from the substrate 21, so that even if the height H1 of the first blade group 22 is greater than the height of the second blade group 23 H2 and the width of the first blade group 22 connected to the base plate 21 can still reinforce the structural strength of the fan wheel 2 near the first blade group 22 by the reinforcing ring 24. However, according to requirements (for example, when the height H2 of the plurality of second blades 231 is greater than the width at the place where the substrate 21 is connected), another reinforcing ring is provided on the side of the plurality of second blades 231 away from the substrate 21.

The motor 3 is coupled to the casing 1 and extends into the accommodating chamber 17 through the second air inlet 15, and has a rotating shaft 31 coupled to the substrate 21. Wherein, the portion of the motor 3 protruding into the accommodating chamber 17 may be only the rotating shaft 31, but may further include other components of the motor 3, such as a portion adjacent to the rotating shaft 31 (as shown in FIG. 2).

With the above structure, please refer to FIG. 5 together, the first air inlet 14 has a first air inlet area A1, and a first air inlet area 15 and the motor 3 have a first air inlet area A1. The second air intake area A2 is greater than the second air intake area A2. Due to the difference between the two air intake areas A1 and A2, the height H1 of the first blade group 22 (which draws airflow through the first air intake area A1) toward the first air inlet 14 is preferably oriented The second blade group 23 of the second air inlet 15 (which draws airflow by the second air inlet area A1) is 1.5 to 2.5 times the height H2. In detail, if the first air inlet 14 is composed of a plurality of sub-air inlets, the first air inlet area A1 refers to the total area formed by the sub-air inlets; similarly, if the second air inlet 15 The peripheral edge and the air duct between the motor 3 are divided into several, and the second air intake area A2 refers to a total area formed by the air ducts between the peripheral edge and the motor 3. Among them, the heights H1 and H2 of the two blade groups 22 and 23 and the first and second air intake areas A1 and A2 preferably have the following relationship: the height H1 of the first blade group 22 divided by the second The height H2 of the blade group 23 can obtain a first ratio, and the first inlet area A1 divided by the second inlet area A2 can obtain a second ratio, wherein the first ratio is 0.5 to 1.5 of the second ratio Times. Therefore, when the fan wheel 2 is running, the two blade groups 22 and 23 can respectively drive an appropriate air volume corresponding to each air intake area, so as to avoid the occurrence of wasted driving power or poor driving efficiency. Compared with the conventional dual-inlet air blower, it can have a larger air output when the same overall axial height (or provide the same air output, further reduce the overall shaft of the fan To height).

Please refer to FIG. 6 and FIG. 7, which are a fan fan assembly further derived from the design concept of the aforementioned fan, and the fan fan assembly includes a casing 1 ′, two fan wheels 2, and a motor 3 ′. The casing 1 'is preferably composed of four shells 1a', 1b ', 1c', 1d ', and the casing 1' includes axially opposite end walls 11 ', 12', 11 ", 12". And two side walls 13 ', 13 ". In detail, the side wall 13' is connected to the two end walls 11 ', 12' and is located between the two end walls 11 ', 12'; and the side wall 13" is connected to the The two end walls 11 ", 12" are located between the two end walls 11 ", 12". In addition, the two side walls 13 ', 13 "are partially connected, and the two end walls 12', 12" are located between the other two end walls 11 ', 11 ". The casing 1' has at least four air inlets and one The air outlet preferably includes a first air inlet 14 ', a second air inlet 15', a third air inlet 14 ", a fourth air inlet 15", and an air outlet 16 as shown in FIG. In detail, the first air inlet 14 'and the second air inlet 15' penetrate the two end walls 11 ', 12', respectively; the third air inlet 14 "and the fourth air inlet 15" respectively The other two end walls 11 ", 12" are penetrated; the air outlet 16 'is disposed at the junction of the two side walls 13', 13 ". Thereby, the casing 1 'is formed inside to form a first receiving chamber 17' and a second receiving chamber 17 ". The first receiving chamber 17 'communicates with the first and second air inlets 14' and 15 '. The second chamber 17 "communicates with the third and fourth air inlets 14", 15 ", and the second and fourth air inlets 15 ', 15" are located between the first and third air inlets 14', 14 " , And the air outlet 16 'communicates with the first and second accommodating chambers 17', 17 ".

The structure of each of the two fan wheels 2 is the same as that of the fan wheel 2 of the aforementioned fan, wherein the two fan wheels 2 are respectively located in the first and second chambers 17 ', 17 ", and the two fan wheels The second surface 212 of the substrate 21 of 2 is opposite. In other words, the two first blade groups 22 are respectively extended from the substrates 21 to which they are combined, and the two second blade groups 23 are respectively formed by the respective substrates 21. The bonded substrates 21 extend in a direction approaching each other.

The motor 3 'is coupled to the casing 1' and has two rotating shafts 31 ', 31 "coaxially disposed and respectively located on the two axial sides of the motor 3', wherein the axial two sides of the motor 3 'are respectively formed by the The second and fourth air inlets 15 ′ and 15 ″ extend into the first and second accommodating chambers 17 ′ and 17 ″ and are respectively coupled to the base plate 21 of the two fan wheels 2 by the two rotating shafts 31 ′ and 31 ″. .

With the above structure, the blower assembly can use only a single motor 3 'to simultaneously draw airflow from at least four air inlets and further converge to a single air outlet, and can provide an appropriate blade group height according to the air inlet area of each air inlet, To avoid such situations as wasted driving power or poor wind efficiency.

In summary, the height of each fan group and the fan fan assembly of the present invention are positively related to the air intake area of each air duct to which they are directed, so that the fan fan and fan fan assembly can use the above structural relationship to Obtained a substantial improvement in wind drive efficiency, thereby providing greater air output or further reducing the overall axial height.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention. The technical scope protected by the invention, so the scope of protection of the present invention shall be determined by the scope of the appended patent application.

Claims (14)

    A blower fan includes: a housing having a first air inlet, a second air inlet, and an air outlet; a container chamber in the housing communicates with the two air inlets and the air outlet; a fan wheel having a base plate It comprises a first surface, a second surface, a radial outer periphery and a joint portion. The first surface faces the first air inlet, the second surface faces the second air inlet, and the radial outer periphery is connected to the first surface. The first surface and the second surface, the joint portion is used to join the rotating shaft, and a portion of the substrate extending from the joint portion to the radial outer periphery does not have any perforations penetrating the first surface and the second surface, A first blade group and a second blade group are respectively disposed on the first and second surfaces, and the height of the first blade group is greater than the height of the second blade group in the axial direction of the fan wheel; and a motor, The motor is coupled to the casing and extends into the accommodating chamber through the second air inlet. The motor has a rotating shaft coupled to the substrate.         The blower fan according to item 1 of the scope of patent application, wherein the first air inlet and the second air inlet are separated along the axial direction and disposed on two end walls of the housing, and the air outlet is disposed between the two end walls. Side wall.         The fan according to item 1 of the application, wherein the height of the first blade group is 1.5 to 2.5 times the height of the second blade group.         The blower fan according to item 1 of the scope of patent application, wherein the first air inlet has a first air inlet area, and the second air inlet area has a second air inlet area between the periphery of the second air inlet and the motor. The air intake area is larger than the second air intake area.         The blower fan described in item 1 of the scope of the patent application, wherein the first air inlet includes a plurality of sub-air inlets, and the sub-air inlets collectively constitute a first air inlet area, a periphery of the second air inlet and the motor There is a second air intake area, and the first air intake area is larger than the second air intake area.         The fan according to item 4 or 5 of the scope of patent application, wherein the height of the first blade group divided by the height of the second blade group is a first ratio, and the first air inlet area is divided by the second The area obtained by the air intake is a second ratio, and the first ratio is 0.5 to 1.5 times the second ratio.         The blower fan according to item 1 of the patent application scope, wherein the first blade group has a plurality of first blades, the second blade group has a plurality of second blades, and the plurality of first blades are connected to the axial direction in the axial direction. Several second blades are misplaced.         The fan according to item 1 of the patent application scope, wherein the first blade group has a plurality of first blades, and the fan wheel further has a reinforcing ring connected to a side of the plurality of first blades away from the substrate.         A fan wheel of a blower fan includes a base plate having a first surface, a second surface, a radial outer periphery and a joint portion. The first and second surfaces are opposite to each other, and the radial outer periphery is connected to the A first surface and the second surface, the coupling portion is located at the center of rotation of the substrate for combining a rotating shaft; a first blade group provided on the first surface of the substrate; and a second blade group provided on the substrate A second surface; wherein, in an axial direction of the fan wheel, a height of the first blade group is greater than a height of the second blade group, and a portion of the substrate extending from the joint portion to the radial outer peripheral edge does not have any Perforations penetrating the first surface and the second surface.         The fan wheel of the fan according to item 9 of the application, wherein the height of the first blade group is 1.5 to 2.5 times the height of the second blade group.         The fan wheel of the fan according to item 9 of the application, wherein the first blade group has a plurality of first blades, the second blade group has a plurality of second blades, and the plurality of first blades are on the shaft. Disposed upwards from the plurality of second blades.         The fan wheel of the fan according to item 9 of the scope of the patent application, wherein the first blade group has a plurality of first blades, and the fan wheel further has a reinforcing ring connected to a side of the plurality of first blades away from the substrate. .         A fan fan assembly includes: two fan wheels, each of which is the fan wheel of the fan fan described in item 9 of the scope of the patent application, and the second surface of the two fan wheels is opposite to each other; A container room and a second container room respectively accommodate the two fans, an air outlet is connected to the first and second container rooms, and at least four air inlets are respectively connected through the first container room or the second container room. The air outlet; and a motor coupled to the housing and extending into the first and second accommodating chambers by two of the at least four air inlets respectively, and two rotating shafts coaxially provided by the motor are respectively connected to the Two fan wheels.         The fan fan assembly according to item 13 of the patent application, wherein the at least four air inlets include a first air inlet, a second air inlet, a third air inlet, and a fourth air inlet, and the first air inlet The air inlet and the second air inlet are connected to the first chamber, and the third air inlet and the fourth air inlet are connected to the second chamber, wherein the second and fourth air inlets are located between the first and third air inlets. The motor extends from the second air inlet and the fourth air inlet into the first and second accommodating chambers, respectively.