WO2019041743A1

WO2019041743A1 - Blower volute and blower using same

Info

Publication number: WO2019041743A1
Application number: PCT/CN2018/074391
Authority: WO
Inventors: 林炎虎; 雷威
Original assignee: 中山大洋电机股份有限公司
Priority date: 2017-08-29
Filing date: 2018-01-28
Publication date: 2019-03-07
Also published as: CN207178308U

Abstract

A blower volute and a blower using same. The blower volute (1) comprises end surface plates (11) at front and back ends and a side surface plate (12). The end surface plates (11) at the two ends and the side surface plate (12) enclose a primary hollow cavity (13); at least one of the end surface plates (11) is provided with an air inlet (14); the side surface plate (12) is provided with an air outlet (15); the air inlet (14) and the air outlet (15) communicate with the primary hollow cavity (13); at least one of the end surface plates (11) is provided with a plurality of protrusions (16) projecting outward; a secondary hollow cavity (160) communicating with the primary hollow cavity (13) is formed inside each protrusion (16). When air passes through the protrusions (16) of a blower provided with the blower volute, the cross-sectional areas of the protrusions (16) of the end surface plates (11) at the two ends are increased, the air quantity is unchanged, and the air speed is reduced, thus the dynamic pressure is reduced and the static pressure is increased. Therefore, the operating efficiency of the blower and a motor can be effectively improved, thereby saving electric energy.

Description

Fan volute and fan thereof

Technical field:

The utility model relates to a fan volute and a fan thereof.

Background technique:

As shown in FIG. 1, the conventional fan includes a motor, a wind wheel, a bracket, and a fan volute 1a. The existing fan volute 1a includes front and rear end panels 11a and a side panel 12a connected between the end panels 11a. The end panel 11a and the side panel 12a of the front and rear ends enclose a cavity. The end panel 11a is provided with an air inlet 13a. The side panel 12a is provided with an air outlet 14a, an air inlet 13a, an air outlet 14a and The cavity is connected, and the existing end panel 11a is a flat plate. The fan of the fan volute 1a of such a structure has the following disadvantages: the operating efficiency of the motor and the fan is not high, the input power of the motor is large, and the motor consumes a large amount of electric energy.

Summary of the invention:

The purpose of the utility model is to provide a fan volute and a fan thereof, which can solve the problems that the current motor and the fan have low operating efficiency, the motor input power is large, and the motor consumes a large amount of electric energy.

The purpose of the utility model is achieved by the following technical solutions:

A first object of the present invention is to provide a fan volute comprising an end panel at the front and rear ends and a side panel connected between the front and rear end panels, end panels and side panels at both ends Enclosing a main cavity, the at least one end plate is provided with an air inlet, the side plate is provided with an air outlet, the air inlet and the air outlet are connected with the main cavity, and at least one end plate is provided with a plurality of The raised portion is raised outward, and an auxiliary cavity is formed inside the convex portion, and the auxiliary cavity communicates with the main cavity.

The end plates on both ends described above are provided with a plurality of raised portions which are outwardly raised.

The above-mentioned convex portion is arranged along the circumference of the air inlet, and the region of the end panel between the air inlet and the air outlet is a flat plate portion.

The raised portion described above includes a side surface and a top surface, and the top surface is a flat surface.

An air inlet is provided on each of the end plates on both ends.

The distance between the end plates described above is H, and the height of the raised portion is H1, and the range of H1 is 0.05H ≤ H1 ≤ 0.15H.

The auxiliary cavity described above includes a top portion and a bottom portion, the top portion being narrower than the bottom portion.

The end panels on both sides described above are symmetrical about the centerline L.

The height H1 of the above-mentioned convex portion is 0.08H.

A second object of the present invention is to provide a fan including a motor, a fan volute, a wind wheel and a bracket, the fan volute including a main cavity, the wind wheel is located inside the main cavity, and the motor is mounted through the bracket The fan volute can drive the wind wheel, and the fan volute has the fan volute described above.

Compared with the prior art, the utility model has the following effects:

1) at least one end plate of the fan volute is provided with a plurality of raised portions protruding outward, an auxiliary cavity is formed inside the convex portion, the auxiliary cavity is connected with the main cavity, and the fan of the fan volute is used to pass the gas At the time of the convex portion, since the cross-sectional area at the convex portion of the end plates at both ends becomes larger, the air volume does not change, and according to the formula: speed = air volume / cross-sectional area, the velocity of the gas becomes small, and according to the formula: Dynamic pressure = one-half times the gas density multiplied by the square of the velocity. When the gas density is constant, the dynamic pressure will decrease. According to the Bernoulli equation: the full pressure is equal to the dynamic pressure plus static pressure. When the total pressure is constant, the static pressure will increase, and the loss of energy obtained by the gas in the volute is mainly caused by the gas striking the volute. When the dynamic pressure of the gas is reduced, the loss in the volute will be reduced, so Effectively improve the efficiency of fan and motor operation, reduce the input power of the motor, and save energy.

2) The end plates on both ends are provided with a plurality of raised portions protruding outward, which is beneficial to the balance of the fan volute.

3) The convex portion is arranged along the circumference of the air inlet, and the area of the end panel between the air inlet and the air outlet is a flat portion, and a convex portion is provided at a place where the gas flows, which can increase the cross of the gas passing portion. Cross-sectional area, better reduce dynamic pressure to increase static pressure, improve fan and motor operating efficiency, motor is more energy-efficient, the area of the end panel between the air inlet and the air outlet is a flat part, which is convenient for connection with ventilation ducts.

4) The raised portion includes a side surface and a top surface, and the top surface is a flat surface for facilitating storage of the fan volute and installation with an external device.

5) The distance between the two end panels is H, the height of the raised portion is H1, and the range of H1 is 0.05H ≤ H1 ≤ 0.15H, the operating efficiency of the fan and the motor is higher, and the input power of the motor is higher. Small, power saving effect is better.

6) When the height H1 of the boss is 0.08H, the fan and motor have the highest operating efficiency, the input power of the motor is the smallest, and the electric energy is the most economical.

7) The auxiliary cavity includes a top portion and a bottom portion, and the top portion is narrower than the bottom portion. With such a structure, the cross-sectional area through which the gas passes can be gradually increased to avoid peeling due to a sudden increase in the cross-sectional area. Phenomenon, to avoid the loss of full pressure, so as to avoid the effect of improving the operating efficiency of the fan and motor.

8) The end plates of the two ends are symmetric about the center line L, the fan volute is the most balanced, and the force is also the most uniform, which is beneficial to improve the efficiency of the fan and the motor.

9) A fan comprising a motor, a fan volute, a wind wheel and a bracket, wherein the fan volute comprises a main cavity, the wind wheel is located inside the cavity, and the motor is mounted in the fan volute through the bracket and can drive the wind wheel Because the fan volute of the utility model is adopted, the operating efficiency of the fan and the motor can be effectively improved, the input power of the motor is reduced, and the energy saving effect is good.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a perspective view of a prior art fan volute;

2 is a perspective view of a fan volute provided by an embodiment of the present invention;

3 is a side view of a fan volute provided by an embodiment of the present invention;

4 is a front view of a fan volute provided by an embodiment of the present invention;

Figure 5 is a cross-sectional view taken along line A-A of Figure 4;

Figure 6 is a perspective view of another fan volute provided by an embodiment of the present invention;

Figure 7 is a perspective view of a fan provided by an embodiment of the present invention;

Figure 8 is a front elevational view of a fan provided by an embodiment of the present invention;

Fig. 9 is a cross-sectional view taken along line B-B of Fig. 8;

Detailed ways:

The present invention will be further described in detail below through the specific embodiments and the accompanying drawings.

Embodiment 1:

As shown in FIG. 2 to FIG. 6 , the present embodiment provides a fan volute, the fan volute 1 including an end panel 11 at the front and rear ends and a side panel connected between the front and rear end panels 11 . 12, the end panel 11 and the side panel 12 at both ends are defined as a main cavity 13 , and the at least one end panel 11 is provided with an air inlet 14 , and the side panel 12 is provided with an air outlet 15 , an air inlet 14 , The air outlet 15 communicates with the main cavity 13. The at least one end panel 11 is provided with a plurality of raised portions 16 which are outwardly raised. The convex portion 16 defines an auxiliary cavity 160 therein, and the auxiliary cavity 160 communicates with the main cavity 13.

Preferably, the end panels 11 on both sides are not flat plates, and the end panels 11 on both ends are provided with a plurality of raised portions 16 protruding outward.

Preferably, the raised portion 16 is disposed along the circumference of the air inlet 14 and the region of the end panel 11 between the air inlet 14 and the air outlet 15 is the flat portion 110.

Preferably, the raised portion 16 includes a side surface 161 and a top surface 162, and the top surface 162 is a flat surface.

Preferably, the end panels 11 at both ends are provided with air inlets 14 .

Preferably, the distance between the end plates 11 is H, and the height of the protrusions 16 is H1, and the range of H1 is 0.05H≤H1≤0.15H.

Preferably, the auxiliary cavity 160 includes a top portion 163 and a bottom portion 164, the top portion 163 being narrower than the bottom portion 164.

Preferably, the end panels 11 on both sides are symmetrical about the center line L.

Preferably, the height H1 of the raised portion 16 is 0.08H.

Embodiment 2:

As shown in FIG. 7 to FIG. 9 , the present embodiment provides a fan including a motor 2 , a fan volute 1 , a wind wheel 3 , and a bracket 4 . The fan volute 1 includes a main cavity 13 and a wind wheel. 3 is located inside the main cavity 13, and the motor 2 is mounted in the fan volute 1 through the bracket 4 and can drive the wind wheel 3. The fan volute 1 is the fan volute described above.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and scope of the present invention are equivalent. The manner of replacement is included in the scope of protection of the present invention.

Claims

A fan volute, the fan volute (1) comprising an end panel (11) at the front and rear ends and a side panel (12) connected between the front and rear end panels (11), end panels at both ends (11) And a side panel (12) enclosing a main cavity (13), the at least one end panel (11) is provided with an air inlet (14), and the side panel (12) is provided with an air outlet (15) The air inlet (14) and the air outlet (15) are in communication with the main cavity (13), characterized in that at least one end panel (11) is provided with a plurality of raised portions (16) protruding outward, the convex portion (16) An auxiliary cavity (160) is formed inside, and the auxiliary cavity (160) is in communication with the main cavity (13).
A fan volute according to claim 1, characterized in that the end plates (11) of the two ends are provided with a plurality of raised portions (16) which are outwardly raised.
A fan volute according to claim 2, wherein said raised portion (16) is arranged along the circumference of the air inlet (14), and at the air inlet (14) and the air outlet (15) The area between the end panels (11) is the flat portion (110).
A fan volute according to any one of claims 1 to 3, characterized in that the raised portion (16) comprises a side surface (161) and a top surface (162), the top surface (162) is a plane.
A fan volute according to any one of claims 1 to 3, characterized in that the end panels (11) at both ends are provided with air inlets (14).
A fan volute according to any one of claims 1 to 3, wherein the distance between the two end plates (11) is H, and the height of the convex portion (16) is For H1, the range of H1 is 0.05H ≤ H1 ≤ 0.15H.
A fan volute according to claim 4, wherein said auxiliary cavity (160) comprises a top portion (163) and a bottom portion (164), said top portion (163) being narrower than the bottom portion (164) .
A fan volute according to claim 5, characterized in that said end plates (11) at both ends are symmetrical about a centerline L.
A fan volute according to claim 6, wherein said raised portion (16) has a height H1 of 0.08H.
A fan comprising a motor (2), a fan volute (1), a wind wheel (3) and a bracket (4), the fan volute (1) comprising a main cavity (13), a wind wheel (3) Located in the main cavity (13), the motor (2) is mounted in the fan volute (1) through the bracket (4) and can drive the wind wheel (3), wherein the fan volute (1) is A fan volute according to any one of claims 1 to 9.