CN207673613U - A kind of impeller assembly and air purifier - Google Patents

Abstract

The utility model discloses an impeller assembly, which comprises an impeller body, a boss protruding upward from the top surface of the impeller body and used for accommodating a motor inside it, and several blades, and the blades are arranged on the impeller body And it is centrifugally distributed outward around the outer circumference of the boss, the top of the boss is conical, and the air flows through the conical surface of the boss to transition to between the blades and flow out. The utility model also discloses an air purifier with the impeller assembly. The impeller assembly and the air purifier of the utility model can effectively avoid turbulent flow at the air inlet of the fan, reduce the loss of air volume, and improve the efficiency of the fan.

Description

A kind of impeller assembly and air cleaner

technical field

The utility model relates to the technical field of air purification devices, in particular to an impeller assembly and an air purifier with the impeller assembly.

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. However, there is a boss at the fixed position of the motor of the traditional centrifugal fan in the air inlet direction, and the diameter of the end surface of the boss is more than 30mm. The turbulent flow causes a loss of part of the air volume, which in turn reduces the air volume distributed at the air inlet between the fan blades, resulting in a decrease in fan efficiency.

Therefore, how to propose an impeller and an air cleaner that can avoid turbulent flow at the air inlet of the fan and improve the efficiency of the fan is an urgent problem to be solved.

Utility model content

The purpose of the utility model is to provide an impeller assembly and an air cleaner, which can effectively avoid turbulent flow at the air inlet of the fan, reduce the loss of air volume, and improve the efficiency of the fan.

For this purpose, the utility model adopts the following technical solutions:

An impeller assembly, comprising an impeller body, a boss protruding upward from the top surface of the impeller body and used for accommodating a motor inside it, and several blades, the blades are arranged on the impeller body and surround the boss The outer periphery of the platform is distributed centrifugally outwards, the top of the boss is conical, and the air flow passes through the conical surface of the boss and transitions to between the blades and flows out.

Wherein, the boss includes a cylindrical section at the lower end and a conical section at the top, the top of the conical section is hemispherical, the bottom surface of the conical section is adapted to the top surface of the cylindrical section, and the conical section is in line with the top surface of the cylindrical section. The junction of the cylindrical sections is a smooth transition.

Wherein, the radius of the hemisphere at the top of the cone segment is 7-8mm.

Wherein, the radius of the hemisphere at the top of the cone segment is 7.5 mm.

Wherein, the diameter of the cylindrical section is 35-45 mm.

Wherein, the diameter of the cylindrical section is 40 mm.

Wherein, the impeller assembly further includes a mounting ring disposed above the impeller body corresponding to the edge of the impeller body, and the blades are connected between the impeller body and the mounting ring.

Wherein, the distance between the air inlets of any two adjacent blades is smaller than the distance between the air outlets, and the air flow transitions from the tapered surface of the boss to the air inlet and then flows out from the air outlet.

An air cleaner includes the impeller assembly.

The beneficial effects of the utility model are: the impeller assembly and the air purifier of the utility model set the top of the boss into a conical shape, so that the airflow at the air inlet of the fan flows through the conical surface The shape of the cone surface transitions slowly, and the entire cone surface transitions smoothly to ensure smooth air flow, avoid turbulent flow at the air inlet of the fan, reduce air volume loss, and improve fan efficiency.

Description of drawings

Fig. 1 is the front structure schematic diagram of the impeller assembly of the present utility model;

Fig. 2 is a three-dimensional structural schematic view of the impeller assembly of the present utility model;

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 utility model will be further described below in conjunction with accompanying drawings 1-3 and through specific embodiments.

The air purifier of the present utility model includes an impeller assembly 5 . As shown in Figures 1 to 3, the impeller assembly 5 of the present utility model includes an impeller body 51, a boss 54 protruding upward from the impeller body 51 and used to accommodate the motor inside it, and a plurality of blades 53, and the blades 53 are arranged on the impeller body 51 and is centrifugally distributed outward around the periphery of the boss 54 , the top of the boss 54 is conical, and the air flows through the conical surface of the boss 54 to transition to between the blades 53 and flow out.

Specifically, the boss 54 includes a cylindrical section at the lower end and a conical section at the upper end, the top of the conical section is hemispherical, the bottom surface of the conical section is adapted to the top surface of the cylindrical section, and the connection between the conical section and the cylindrical section is a smooth transition .

In this embodiment, the radius of the hemisphere at the tip of the cone segment is 7-8 mm. For example, the radius of the top hemispherical shape of the conical segment can be 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm, 8mm.

In this embodiment, the diameter of the cylindrical section is 35-45 mm. For example, the diameter of the cylindrical segment may be 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm.

In this embodiment, the radius of the top of the conical section is 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 smooth transition, and the entire conical surface is smoothly transitioned to ensure smooth air flow; the air inlet of the fan Gradually expand, the highest point of the conical section is 6.6mm away from the smallest area of the air inlet of the fan, 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.

As shown in FIGS. 1 and 2 , the impeller assembly 5 of the present invention also includes a mounting ring 52 disposed above the impeller body 51 corresponding to the edge of the impeller body 51 , and the blades 53 are connected between the impeller body 51 and the mounting ring 52 . The distance between the air inlets 55 of any two adjacent blades 53 is smaller than the distance between the air outlets 56 , and the air flows from the tapered surface of the boss 54 to the air inlet 55 and then flows out from the air outlet 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. 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.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (9)

1. a kind of impeller assembly (5), which is characterized in that including impeller body (51), the top surface of the impeller body (51) to On protrude out and for motor to be contained in its internal boss (54) and several blades (53), the blade (53) is set to described Distribution is centrifuged outward on impeller body (51) and around the boss (54) periphery, the top of the boss (54) is in cone, Conical surface transition of the air-flow through the boss (54) is between the blade (53) and flowing out.

2. impeller assembly (5) according to claim 1, which is characterized in that the boss (54) includes the circle positioned at lower end The top of shell of column and conical section positioned at top, the conical section is hemispherical, the bottom surface of the conical section and the cylindrical section Top surface be adapted, the junction of the conical section and the cylindrical section is smoothly transits.

3. impeller assembly (5) according to claim 2, which is characterized in that the hemispheric radius on the conical section top For 7~8mm.

4. impeller assembly (5) according to claim 3, which is characterized in that the hemispheric radius on the conical section top For 7.5mm.

5. impeller assembly (5) according to claim 2, which is characterized in that a diameter of 35~45mm of the cylindrical section.

6. impeller assembly (5) according to claim 5, which is characterized in that a diameter of 40mm of the cylindrical section.

7. according to claim 1~6 any one of them impeller assembly (5), which is characterized in that the impeller assembly (5) is also wrapped Include the mounting ring (52) that the edge corresponding to the impeller body (51) is set to above the impeller body (51), the blade (53) it is connected between the impeller body (51) and the mounting ring (52).

8. impeller assembly (5) according to claim 7, which is characterized in that arbitrary neighborhood two blade (53) enters The distance between air port (55) is less than the distance between air outlet (56), and air-flow is from the conical surface transition of the boss (54) to described It is flowed out from the air outlet (56) after air intake vent (55).

9. a kind of air purifier, which is characterized in that including any one of claim 1~8 impeller assembly (5).