CN218151505U

CN218151505U - Mixed flow fan for air purifier

Info

Publication number: CN218151505U
Application number: CN202122504037.6U
Authority: CN
Inventors: 胡国军; 王伟华; 胡渊海; 张宇祥
Original assignee: Hangzhou Dunli Electric Appliances Co ltd; Hangzhou Dunli Fan Co ltd
Current assignee: Hangzhou Dunli Electric Appliances Co ltd; Hangzhou Dunli Fan Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-12-27
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a mixed flow fan for air purifier, which comprises a motor, the mixed flow wind wheel, stator air guide section of thick bamboo subassembly, top cap subassembly and import collector, stator air guide section of thick bamboo subassembly includes the shell, the impeller casing, stator casing and diffusion casing are accepted in proper order, the shell is with the impeller casing, the stator casing, diffusion casing parcel forms a whole in inside, mixed flow wind wheel coaxial arrangement is on the motor, and settle in the impeller casing, fixedly connected with stator in the stator casing, the stator inboard is provided with radial holding ring, radial holding ring fixed connection motor, top cap subassembly and import collector are installed respectively at the upper and lower both ends of stator air guide section of thick bamboo subassembly. Compared with the air purifier fan sold on the market, the mixed flow fan for the air purifier has the advantages of large flow, high pressure, high efficiency and compact structure in design.

Description

Mixed flow fan for air purifier

Technical Field

The utility model relates to a ventilation and air purification technical field especially relate to a mixed flow fan for air purifier.

Background

The fan is one of the most central parts of the air purifier, and not only influences the performance of a product, but also influences the structure and the installation of the product. Fans are generally classified according to the movement direction of air flow in an impeller, an axial flow fan is on an axial section, and the air flow flows in a flow channel of the impeller along a direction approximately parallel to the rotation axis of the fan; the centrifugal fan is arranged on an axial section, and airflow flows in the impeller flow channel along the direction approximately vertical to the rotating shaft of the fan; the condition of the mixed flow fan is between the two, and the airflow direction of the mixed flow fan forms a certain angle with the rotating shaft of the fan;

because of air purifier generally uses the filter screen of multiple functions, lead to the fan to select for use the big centrifugal fan of wind pressure for overcome the great resistance that the filter screen produced. Most of air purifier products sold in the market at present adopt a centrifugal fan, and the defects of the centrifugal fan are that the flow coefficient is low, the power consumption is large, and particularly when a forward-inclined centrifugal wind wheel is adopted, the spiral volute structure is indispensable, so that the product volume is large and the installation is complex;

the mixed flow fan is characterized in that the mixed flow fan is arranged between a centrifugal fan and an axial flow fan, and has the characteristics of higher pressure coefficient and flow coefficient, high efficiency and compact structure.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a mixed flow fan for air purifier.

The utility model adopts the following technical scheme:

the utility model provides a mixed flow fan for air purifier, which comprises a motor, the mixed flow wind wheel, stator wind guide section of thick bamboo subassembly, top cap subassembly and import collector, stator wind guide section of thick bamboo subassembly includes the shell, impeller shell, stator casing and diffusion casing are accepted in proper order, impeller shell is with impeller shell to the shell, stator casing, diffusion casing parcel forms a whole in inside, mixed flow wind wheel coaxial arrangement is on the motor, and settle in impeller shell, the internal fixedly connected with stator of stator, the stator inboard is provided with radial holding ring, radial holding ring fixed connection motor, top cap subassembly and import collector are installed respectively at stator wind guide section of thick bamboo upper and lower both ends. The guide vane shell can ensure better coaxiality of the fan and the guide vane air duct assembly through radial positioning, the gap between the mixed flow impeller and the impeller shell can be very small, the gap backflow loss of fluid is small, and the efficiency of the fan is high; the diffusion shell converts part of kinetic energy of the outlet airflow into static pressure energy so as to reduce dynamic pressure loss of the outlet and improve the efficiency of the fan.

Preferably, the motor is an electronically commutated dc motor, and is an outer rotor motor or an inner rotor motor.

Preferably, the surface of the guide blade of the guide vane is a space curved surface, the cross section of the guide blade is crescent, and the crescent front edge of the guide blade is arranged opposite to the rotating direction of the mixed flow wind wheel.

Preferably, the guide vane is provided with N guide vanes, and the number N of the vanes is more than or equal to 3.

Preferably, the mixed flow wind wheel is an integral impeller or a welded metal impeller or a riveted metal impeller.

Preferably, the integral impeller is integrally injection molded by reinforced modified plastic or injection molded by a metal insert and plastic.

Preferably, the mixed flow wind wheel is in a centrifugal impeller structure form or an axial flow impeller form.

Preferably, the diffuser shell is conically enlarged with a cone angle of 3 to 45 °.

Preferably, the top cover assembly comprises a top cover and a display touch screen assembly; the center of the top cover is provided with a through hole which is circular or square, a corresponding display touch screen assembly is installed in the through hole and fixed, and the top cover is flush with the display touch screen assembly; and a ventilation mesh is arranged between the inner ring and the outer ring of the top cover, the ventilation mesh is in a circular ring shape or a ray shape, and purified air flows out through the ventilation mesh.

Preferably, the inlet collector is coaxially mounted on the impeller housing. The gas is smoothly introduced into the impeller so that the inlet condition of the impeller has a good gas flow state.

The utility model has the advantages that: when the air purifier runs by using the mixed flow fan, gas in the space on the suction side gradually and quickly flows in through the inlet collector; the mixed flow wind wheel in the impeller shell applies work to the inflowing air, and because the clearance between the mixed flow wind wheel and the impeller shell can be very small, the air backflow loss through the clearance is small, and the efficiency of the fan is high; n guide blades are arranged in the guide blade shell, and the number N of the blades is more than or equal to 3, so that the flow guide effect of the fluid is enhanced; meanwhile, the diffusion shell converts partial kinetic energy of outlet gas into static pressure energy so as to reduce dynamic pressure loss of an outlet and improve the efficiency of the fan.

Drawings

FIG. 1 is a sectional view of the assembly of the present invention;

FIG. 2 is an exploded view of the assembly of the present invention;

in the figure: 10. the combined-flow wind wheel comprises a motor, 20, a mixed-flow wind wheel, 30, a guide vane wind guide barrel assembly, 40, a top cover assembly, 50, an inlet current collector, 31, a shell, 32, an impeller shell, 33, a guide vane shell, 34, a diffusion shell, 41, a top cover, 42 and a display touch screen assembly.

Detailed Description

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example (b): referring to fig. 1 and 2, a mixed flow fan for an air purifier includes a motor 10, a mixed flow wind wheel 20, a guide vane air duct assembly 30, a top cover assembly 40, and an inlet collector 50.

The mixed-flow wind wheel 20 is coaxially arranged on the motor 10 and is placed inside the guide vane air duct assembly 30; the motor is arranged on a radial positioning ring at one end of the guide vane, and the other end of the guide vane is fixedly connected with the inner wall of the air duct assembly, so that the better coaxiality of the fan and the air duct assembly can be ensured; meanwhile, the top cover assembly 40 and the inlet collector 50 are respectively installed at the upper end and the lower end of the guide vane air duct assembly 30;

the mixed flow wind wheel 20 is preferably an integrated impeller in a centrifugal impeller structure form formed by injection molding of a metal insert and a plastic material;

the motor 10 is preferably an electronically commutated direct current motor (EC), which may be an outer rotor motor or an inner rotor motor.

The guide vane air duct assembly 30 comprises a shell 31, an impeller shell 32, a guide vane shell 33 and a diffusion shell 34; the guide vane shell 33 can ensure better coaxiality of the fan and the guide vane air duct component through radial positioning, the gap between the mixed flow impeller 20 and the impeller shell 32 can be very small, the gap backflow loss of fluid is small, and the efficiency of the fan is high; the diffusion shell 34 converts part of kinetic energy of the outlet airflow into static pressure energy so as to reduce dynamic pressure loss of the outlet and improve the efficiency of the fan; the casing 31 encloses the impeller casing 32, the guide vane casing 33, and the diffuser casing 34 as a single body.

The top cover assembly 40 comprises a top cover 41 and a display touch screen assembly 42; a large through hole is formed in the center of the top cover, the circular or square through hole is preferred, the corresponding display touch screen assembly is installed in the through hole and fixed, and the top cover is flush with the display touch screen assembly; a ventilation mesh, preferably in the shape of a circular ring or a ray, is arranged between the inner ring and the outer ring of the top cover, and purified air flows out through the ventilation mesh.

The inlet collector 50 is coaxially installed in the impeller housing 32 to smoothly guide the gas into the impeller 20, thereby providing a good inlet condition of the impeller with a good flow condition.

When the fan operates, gas in the space on the suction side gradually and quickly flows in through the inlet collector; the mixed flow impeller in the impeller shell applies work to the inflowing gas, and because the clearance between the mixed flow impeller and the impeller shell can be made very small, the gas backflow loss through the clearance is small, and the efficiency of the fan is high; n guide blades are arranged in the guide blade shell, and the number N of the blades is more than or equal to 3, so that the flow guide effect of the fluid is enhanced; meanwhile, the diffusion shell converts partial kinetic energy of outlet gas into static pressure energy so as to reduce dynamic pressure loss of an outlet and improve the efficiency of the fan.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. The utility model provides a mixed flow fan for air purifier, includes motor, mixed flow wind wheel, stator wind guide assembly, top cap subassembly and import collector, characterized by, stator wind guide assembly includes shell, impeller shell, stator casing and diffusion casing accept in proper order, the shell is with impeller shell, stator casing, diffusion casing parcel forms a whole in inside, mixed flow wind wheel coaxial arrangement is on the motor to settle in impeller shell, the fixedly connected with stator in the stator casing, the stator inboard is provided with radial positioning ring, radial positioning ring fixed connection motor, top cap subassembly and import collector are installed respectively at the upper and lower both ends of stator wind guide assembly.

2. The mixed flow fan as claimed in claim 1, wherein the motor is an electronically commutated dc motor, an external rotor motor or an internal rotor motor.

3. The mixed-flow fan of claim 1, wherein the guide vane has a space curved surface and a crescent cross section, and the crescent front edge of the guide vane is opposite to the rotation direction of the mixed-flow wind wheel.

4. The Francis blower as claimed in claim 1, wherein N guide vanes are provided to said guide vanes, and the number N of the guide vanes is not less than 3.

5. The mixed flow fan for the air purifier as claimed in claim 1, wherein the mixed flow wind wheel is an integral impeller or a welded metal impeller or a riveted metal impeller.

6. A mixed flow fan for an air cleaner as claimed in claim 5, wherein said integral impeller is integrally injection molded by reinforced modified plastic or by metal insert and plastic.

7. The mixed flow fan for the air purifier as claimed in claim 1, wherein the mixed flow wind wheel is in a centrifugal impeller structure form or an axial flow impeller form.

8. The mixed flow fan as claimed in claim 1, wherein the diffuser is enlarged in a tapered shape having an angle of 3-45 °.

9. The mixed flow fan for the air purifier as claimed in claim 1, wherein the top cover assembly comprises a top cover and a display touch screen assembly; the center of the top cover is provided with a through hole which is circular or square, a corresponding display touch screen assembly is installed in the through hole and fixed, and the top cover is flush with the display touch screen assembly; and a ventilation mesh is arranged between the inner ring and the outer ring of the top cover, the ventilation mesh is in a circular ring shape or a ray shape, and purified air flows out through the ventilation mesh.

10. The mixed flow fan as claimed in claim 1, wherein the inlet collector is coaxially mounted to the impeller housing.