CN108443221A - Centrifugal fan blade and air purification equipment - Google Patents

Abstract

The invention discloses a centrifugal fan blade and air purification equipment, wherein the centrifugal fan blade comprises a front disc, a rear disc and a plurality of fan blades, wherein an air inlet is formed in the front disc; an air outlet is arranged between the rear disc and the front disc; a plurality of blades are uniformly distributed between the front disc and the rear disc to form a wind wheel; the airflow enters the centrifugal fan from the air inlet, enters the flow channel through the front edge of the blade, and then flows out of the air outlet through the rear edge of the blade. The trailing edge of the blade is arranged in a saw-tooth shape. The angle of the inlet mounting angle a of the blade is 20-40 degrees, and the angle of the outlet mounting angle b of the blade is 30-50 degrees. The blades are arranged on the rear disc, and the number of the blades is 7-11. The blades are fixed on the back plate through ultrasonic welding. The back plate is a disc shape with a horn mouth. The centrifugal fan blade, the centrifugal fan comprising the centrifugal fan blade and the air purification equipment comprising the centrifugal fan blade can improve the working efficiency, and reduce the noise and the power consumption of the centrifugal fan blade, the centrifugal fan and the air purification equipment.

Description

A centrifugal fan blade and air purification equipment

technical field

The invention relates to a centrifugal fan blade and air purification equipment containing the fan blade, in particular to a centrifugal fan blade in a purifier and the air purification equipment including the fan blade, and belongs to the technical field of air purification devices.

Background technique

With the rapid development of the economy, smog pollution is becoming more and more serious at the same time, and the problem of air governance is difficult to solve for a while. In addition, with the improvement of living standards, people pay more and more attention to health. Therefore, consumers pay more attention to air purification. The demand for devices has gradually turned into rigid demand. As the market has higher and higher requirements for the purification ability of the purifier, the noise requirements are also higher and higher, and the efficiency requirements of the centrifugal fan blades are also higher and higher. At present, the mainstream filter air purifiers on the market use motors to drive the fan blades to generate power. Suction/supply air to form forced convection, and the air is filtered through the filter.

However, due to the unreasonable structural design of the existing centrifugal fan blades, the noise of the centrifugal fan blades and the centrifugal fan is high and the power consumption is high.

Contents of the invention

Aiming at the above-mentioned problems in the prior art, the present invention provides a centrifugal fan blade and air purification equipment. The noise and power consumption of the centrifugal fan and the purifier adopting the centrifugal fan blade of the present invention are low, and the purifier has a low-frequency abnormal sound. Low, effectively improving the performance of fan blades and fans.

Technical scheme of the present invention is as follows:

The invention provides a centrifugal wind blade, which includes a front disk, a rear disk and several wind blades, wherein an air inlet is arranged on the front disk; an air outlet is arranged between the rear disk and the front disk; several blades are evenly arranged on the front disk Between it and the rear plate, the wind wheel is formed; the air flow enters the centrifugal fan blade from the air inlet, enters the flow channel through the front edge of the blade, and then flows out from the air outlet through the rear edge of the blade.

As a further improvement of the present invention, the trailing edge of the blade is arranged in a zigzag shape.

As a further improvement of the present invention, the inlet installation angle a of the blade is 20-40°, and the outlet installation angle b is 30-50°.

As a further improvement of the present invention, the blades are mounted on the rear disk.

As a further improvement of the present invention, the number of the blades is 7-11.

As a further improvement of the present invention, the blades are fixed on the rear plate by ultrasonic welding.

As a further improvement of the present invention, the rear disc is in the shape of a disc with a bell mouth.

As a further improvement of the present invention, the wind wheel and the motor shaft are connected by a shaft sleeve, and the shaft sleeve and the wind wheel are integrally formed by secondary injection molding.

As a further improvement of the present invention, the shaft sleeve is connected with the motor shaft through a rubber member.

As a further improvement of the present invention, several reinforcing ribs are uniformly arranged along the circumferential direction on the central axis of the rear plate.

The present invention also provides an air purification device, which includes the above-mentioned centrifugal fan blade.

The beneficial effects of the present invention are as follows:

The invention can improve the working efficiency of the centrifugal fan, the centrifugal fan and the purifier, and reduce the noise and power consumption of the centrifugal fan, the centrifugal fan and the purifier.

Description of drawings

Fig. 1 is a sectional view of the impeller assembly of the present invention.

Figure 2 is a bottom view of the impeller.

Figure 3 is a front view of the wind wheel.

Fig. 4 is a perspective view of the wind wheel.

Marks in the figure: 1-front disc; 2-blade; 2.1-blade trailing edge sawtooth; 3-rear disc; 3.1-reinforcement rib of rear disc; 4-axle sleeve assembly;

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

A centrifugal fan blade of the present invention includes a front disk 1, a rear disk 3 and a plurality of blades 2 (as shown in Fig. 1 and Fig. 4 ). Wherein, an air inlet is provided on the front panel; an air outlet is provided between the rear panel 3 and the front panel 1; a plurality of blades 2 are evenly arranged between the front panel 1 and the rear panel 3; wherein, the rear edge of the blade 2 is arranged Into a sawtooth shape, forming the sawtooth 2.1 on the trailing edge of the blade; the airflow enters the centrifugal fan blade from the air inlet, enters the flow channel through the leading edge of the blade, and then flows out from the air outlet through the trailing edge of the blade. The invention can improve the working efficiency of the centrifugal fan blade, the centrifugal fan including the above centrifugal fan blade and the air purification equipment including the centrifugal fan blade, and reduce the noise and power consumption of the centrifugal fan blade, the centrifugal fan and the air purification equipment.

The rear plate 3 of the centrifugal fan blade is used to install the fan blade 2, and the wind wheel is composed of 7-11 blades. The blade 2 and the rear plate 3 adopt ultrasonic welding technology to ensure high welding strength and reliability without affecting the appearance. The inlet installation angle a of the blade 2 is 20-40°, the outlet installation angle b is 30-50°, the inlet installation angle a is the tangent direction of the air inlet surface opposite to the rotation direction of the blade, and the arc tangent of the blade air inlet surface The included angle, the outlet angle b is the included angle between the tangent direction of the outlet surface opposite to the rotation direction of the fan blade and the arc tangent of the blade outlet surface. (As shown in Figure 3). The setting of the trailing edge of the blade is designed into a sawtooth shape 2.1 according to the characteristics of the wind, which can effectively reduce the discrete noise at the outlet, reduce the eddy current noise, and thus reduce the noise of the whole machine.

The rear disk 3 of the wind wheel is designed to be disc-shaped and bell-mouthed, which basically coincides with the direction of fluid flow, so that the air is released smoothly, reducing airflow interference, reducing eddy current intensity, further reducing rotation noise, reducing frictional resistance, and improving air outlet efficiency. The wind wheel and the motor shaft are connected by the shaft sleeve 4, and the shaft sleeve and the wind wheel are integrally formed by secondary injection molding to ensure assembly accuracy and higher connection stability without separate assembly, which reduces the process flow and production cost. The middle of the shaft sleeve is connected by rubber parts 4.1, which can effectively reduce the vibration caused by the high-speed operation of the wind wheel and make the fan run more smoothly. In order to further improve the strength of the rear plate, six reinforcing ribs 3.1 are evenly arranged on the outer circle of the mounting column (as shown in Figure 2).

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A centrifugal fan blade, characterized in that: it comprises a front disc, a rear disc and some blades, wherein an air inlet is arranged on the front disc; an air outlet is arranged between the rear disc and the front disc; several blades are evenly arranged on the Between the front disk and the rear disk, a wind wheel is formed; the airflow enters the centrifugal fan blade from the air inlet, enters the flow channel through the front edge of the blade, and then flows out from the air outlet through the rear edge of the blade; the rear edge of the blade is set to Zigzag shape. 2. A centrifugal fan blade according to claim 1, characterized in that: the inlet installation angle a of the blade is 20-40°, and the outlet installation angle b is 30-50°. 3. A centrifugal fan blade according to claim 1, characterized in that: said blade is mounted on a rear plate. 4. A centrifugal fan blade according to claim 1, characterized in that: the number of said blades is 7-11. 5 . The centrifugal fan blade according to claim 1 , wherein the blade is fixed on the rear plate by ultrasonic welding. 5 . 6. A centrifugal fan blade according to claim 1, characterized in that: the rear disc is in the shape of a disc with a bell mouth. 7. A centrifugal fan blade according to claim 1, characterized in that: the wind wheel and the motor shaft are connected by a shaft sleeve, and the shaft sleeve and the wind wheel are integrally formed by secondary injection molding. 8 . The centrifugal fan blade according to claim 1 , wherein the shaft sleeve is connected to the motor shaft through a rubber member. 9 . The centrifugal fan blade according to claim 1 , wherein several reinforcing ribs are evenly arranged along the circumferential direction at the central axis of the rear plate. 10 . 10. An air purification device, characterized by comprising the centrifugal fan blade according to any one of claims 1-9.