CN107956740A - A kind of impeller assembly and air purifier for air purifier - Google Patents

Abstract

The invention discloses a kind of impeller assembly for air purifier and with the impeller assembly air purifier, the impeller assembly is arranged at mounting ring and some blades above the impeller body including impeller body, the edge corresponding to the impeller body, the top surface of the impeller body has protruded upward boss, the blade is connected between the impeller body and the mounting ring and outwards centrifuges the distance between distribution, the air intake vent of two blades of arbitrary neighborhood less than the distance between air outlet around the boss periphery；It can effectively improve air quantity, and can guarantee that compared with low noise.

Description

An impeller assembly for an air cleaner and the air cleaner

technical field

The invention relates to the technical field of air purifiers, in particular to an impeller assembly for an air purifier and the air purifier.

Background technique

With the deterioration of air quality, more and more people begin to pay attention to the impact of air quality on human health. Air purifiers, also known as air cleaners, air fresheners, and purifiers, refer to air pollutants that can absorb, decompose, or transform various air pollutants (generally including PM2.5, dust, pollen, odor, formaldehyde and other decoration pollution, bacteria , allergens, etc.), products used to improve air cleanliness, which have been widely used in homes, offices and other places.

The power source of the existing air purifier is a fan, and the operating condition of the fan directly affects the performance of the air purifier. With the improvement of the requirements for air purifiers, the requirements for the noise of the fan are becoming more and more stringent under the premise that the fan can meet the air volume. The impeller of the traditional fan adopts forward blades and volute to achieve the required wind pressure and air volume. Since the bending direction of the forward blades is opposite to the trajectory of the gas, the gas is forcibly changed, resulting in loss of air volume and increased noise. . At the same time, because the volute tongue of the volute often needs to squeeze the wind in order to prevent the gas from circulating in the volute, this also increases the noise to a certain extent. In addition, under the action of the volute, the wind speed at the air outlet of the volute increases, directly impacting on the grid, resulting in increased noise.

Therefore, how to propose an impeller assembly that can increase the air volume and ensure lower noise is an urgent problem to be solved.

Contents of the invention

The object of the present invention is to provide an impeller assembly for an air cleaner and the air cleaner, which can effectively increase the air volume and ensure lower noise.

For reaching this purpose, the present invention adopts following technical scheme:

An impeller assembly for an air cleaner, the impeller assembly includes an impeller body, a mounting ring arranged above the impeller body corresponding to the edge of the impeller body, and several blades, the top surface of the impeller body is convex upward There is a boss, and the blades are connected between the impeller body and the mounting ring and are centrifugally distributed outward around the outer circumference of the boss, and the distance between the air inlets of any two adjacent blades is smaller than the air outlet. The distance between the vents.

Wherein, the blade includes a blade connection section and a blade body, the blade connection section is away from the boss and connected to the installation ring, and the blade body is close to the boss and connected to the installation ring.

Wherein, the blade connection section and the blade body are arranged obliquely in opposite directions, and the connection between the blade connection section and the blade body forms an included angle.

Wherein, the blade body is curved.

Wherein, the bending direction of the blade body is toward the side where the boss is located.

An air cleaner includes the impeller assembly.

The beneficial effects of the present invention are:

In the impeller assembly of the present invention, by canceling the volute structure, the diameter of the impeller can be enlarged, the air volume can be increased under certain space constraints, and the blades can be connected between the impeller body and the mounting ring and distributed centrifugally outward around the outer circumference of the boss. The distance between the air inlets of any two adjacent blades is smaller than the distance between the air outlets, and the airflow flows from the boss to the blades. Since the air inlets are smaller and the air outlets are larger, after the air inlets are squeezed Flow to the air outlet, increase the air outlet area under the same air volume, reduce the wind speed at the air outlet, and then achieve the purpose of noise reduction.

Description of drawings

Fig. 1 is the front structural representation of impeller assembly of the present invention;

Fig. 2 is a three-dimensional schematic diagram of the impeller assembly of the present invention;

Fig. 3 is a schematic diagram of the air flow direction of the impeller assembly of the present invention.

In the figure: 5-impeller assembly; 51-impeller body; 52-installation ring; 53-blade; 531-blade connecting section; 532-blade body; 54-boss; 55-air inlet; 56-air outlet.

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings 1-3 and through specific embodiments.

The air purifier of the present invention includes a filter device located in the middle and fans arranged at both ends of the filter device. The air flow enters the filter device from the outside and is filtered by the filter device, then enters the fan on both sides, and is discharged from the fan.

As shown in Figures 1 to 3, the fan applied to the above-mentioned air cleaner includes an impeller assembly 5, and the impeller assembly 5 includes an impeller body 51, a mounting ring 52 and a plurality of blades 53 that are arranged on the top of the impeller body 51 corresponding to the edge of the impeller body 51 . The blades 53 are located between the mounting ring 52 and the impeller body 51. The top surface of the impeller body 51 protrudes upwards with a boss 54. The blades 53 are connected between the impeller body 51 and the mounting ring 52 and are centrifugally distributed around the outer circumference of the boss 54. , the distance between the air inlets 55 of any two adjacent blades 53 is smaller than the distance between the air outlets 56 . In this embodiment, there is a distance between the end of the vane 53 close to the boss 54 and the boss 54 , and the two do not contact.

Further, the blade 53 includes a blade connection section 531 and a blade body 532 , the blade connection section 531 is away from the boss 54 and connected to the mounting ring 52 , and the blade body 532 is close to the boss 54 and connected to the installation ring 52 . In this embodiment, the blade connection section 531 and the blade body 532 are inclined in opposite directions, and the connection between the blade connection section 531 and the blade body 532 forms an included angle, that is, the blade connection section 531 and the blade body 532 form a √-shaped structure .

The blade body 532 of the present invention is curved. Preferably, the bending direction of the blade body 532 faces the side where the boss 54 is located.

The blade connecting section 531 is also curved, and the bending direction of the blade connecting section 531 is opposite to the bending direction of the blade body 532. In this embodiment, the bending direction of the blade connecting section 531 is counterclockwise, and the bending direction of the blade body 532 The folding direction is clockwise.

In particular, the thickness of the blade connection section 531 is greater than the thickness of the blade body 532 .

Based on the above structure, the blade adopts the centrifugal type, which is different from the axial flow type. Its bending direction is the same as the trajectory of the gas, so it follows the flow direction of the gas, and the absolute speed of the backward blade to the airflow is also smaller than that of the forward type. , the speed at which the airflow collides with the end cover is also small; the distance between two adjacent blade bodies gradually expands from the inside to the outside, and the expansion is relatively gentle, and the airflow is relatively smooth. Therefore, its energy loss is relatively The orientation is lower, and the air output of the air purifier is increased while meeting the noise requirements.

In this embodiment, the parameters of the blades are as follows: impeller diameter 100mm, blade 10, blade height 35mm, the minimum width at the entrance of the blade channel formed by two adjacent blades is 6.5mm, and the minimum width at the outlet of the blade channel is 13.2 mm. mm, the arc length of the blade is 36mm, and the diameter of the inlet of the blade channel is 53mm.

With this blade form, the volute is eliminated in the structure of the fan, and the diameter of the impeller is increased under a certain space limitation, the air volume of the fan is increased, and the air outlet area is increased under the same air volume to achieve the effect of noise reduction.

In addition, the bottom of the boss 54 is provided with a motor installation groove, and a motor assembly is installed in the motor installation groove, and the motor assembly 4 can drive the impeller assembly 5 to rotate along the central axis. Preferably, the boss 54 is a cylindrical structure with a tapered top, including a bottom cylindrical section and a top conical section, the air flow smoothly transitions from the conical surface of the conical section to between the blades 53, and flows from the air inlet 55 to the air outlet 56 flow out.

The radial diameter of the boss in the prior art is generally more than 30mm. When the fan is working normally, most of the air volume of the fan directly impacts the end face in the radial direction, resulting in a loss of part of the air volume and a decrease in the distributed air volume at the entrance of the fan channel. , leading to a decrease in the efficiency of the fan; at the same time, the direct impact of the air intake of the fan on the radial end face will cause turbulent flow at the air inlet of the fan, resulting in a decrease in the efficiency of the fan and an increase in noise. In this embodiment, the top of the conical section is a hemispherical surface with a radius of 7.5mm, the diameter of the bottom surface of the conical section is 40mm, and the connection between the conical section and the cylindrical section is a circular arc transition, and the entire conical surface transitions smoothly to ensure smooth wind. ; The air inlet of the fan is gradually enlarged, and the distance between the highest point of the conical section and the smallest area of the air inlet of the fan is 6.6mm, so as to avoid the influence of the conical section on the air inlet area. After setting in this way, it can effectively reduce the influence of the end face of the boss on the air intake of the fan, increase the air volume at the inlet of the blade slot, reduce the turbulent flow at the air inlet of the fan, and thus improve the efficiency of the fan.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.

Claims (6)

1. A kind of impeller assembly (5) for air cleaner, it is characterized in that, described impeller assembly (5) comprises impeller body (51), the edge corresponding to described impeller body (51) is arranged on described impeller The mounting ring (52) and several blades (53) above the body (51), the top surface of the impeller body (51) protrudes upwards with a boss (54), and the blades (53) are connected to the impeller body (51) and the mounting ring (52) and are centrifugally distributed outward around the outer circumference of the boss (54), and the distance between the air inlets (55) of any adjacent two blades (53) is less than The distance between the air outlets (56). 2. The impeller assembly (5) according to claim 1, characterized in that, the blade (53) comprises a blade connection section (531) and a blade body (532), and the blade connection section (531) is far away from the The boss (54) is connected to the installation ring (52), and the blade body (532) is close to the boss (54) and connected to the installation ring (52). 3. The impeller assembly (5) according to claim 2, characterized in that, the blade connection section (531) and the blade body (532) are arranged in opposite directions, and the blade connection section (531) and the blade body (532) are arranged in opposite directions. The junction of the blade body (532) forms an included angle. 4. The impeller assembly (5) according to claim 2 or 3, characterized in that, the blade body (532) is curved. 5. The impeller assembly (5) according to Claim 4, characterized in that, the bending direction of the blade body (532) faces the side where the boss (54) is located. 6. An air cleaner, characterized in that it comprises the impeller assembly (5) according to any one of claims 1-5.