CN201621101U - Centrifugal blower - Google Patents

Abstract

The utility model discloses a centrifugal blower, which comprises a motor, a shell and a plurality of blades, wherein the motor and the blades are arranged inside a space which is encircled by the shell, and the plurality of blades are uniformly distributed on a rotation shaft of the motor. The shell consists of front disc and a rear disc, wherein a circular hole on the middle of the front disc is of an air inlet, and the gap between two adjacent blades is of an air outlet. The area ratio between the air outlet and the air inlet is 7:4. The centrifugal blower has reasonable area ratio of the air inlet and the air outlet, so the air volume is large, the energy consumption is low, and the noise is low. The centrifugal blower is applicable to the intelligent ventilation heat exchanging system in the fields such as computer room, communication base station and the like.

Description

A kind of centrifugal blower

Technical field

The utility model relates to and a kind ofly has rational outlet and inlet open area ratio, thereby realizes the centrifugal blower of higher air-supply efficient, belongs to the air-conditioning technique field.

Background technique

As everyone knows, occasions such as communication base station are very high to the requirement of ambient temperature, need utilize air-conditioning equipment to regulate indoor environmental condition.For energy saving, people have worked out the intelligent aeration heat-exchange system that is used for communication base station.It utilizes the circumstance of temperature difference of inside of base station, outside, forces to carry out the heat exchange of the cold and hot air in inside and outside, base station by blower fan, thereby realizes reducing the purpose of temperature in the base station.Therefore, this intelligent aeration heat-exchange system requires very high to the operational effect of blower fan.

Centrifugal blower is to use the most general a kind of blower fan at present.It is converted to the principle of potential energy according to kinetic energy, utilizes the impeller of high speed rotating that gas is quickened, and slows down, changes the flow direction then, makes kinetic energy convert potential energy (pressure) to.In centrifugal blower, gas is from axially entering impeller, and gas stream changes over radially when impeller, enters Diffuser then.In Diffuser, gas and changing flow direction cause deceleration, this decelerating effect converts kinetic energy to the pressure energy, thereby produces a large amount of high pressure draughts at exhaust outlet.Wherein increased pressure mainly occurs in the impeller, and next occurs in the Diffuser.The intake grill of centrifugal blower is vertical with exhaust outlet, so blast is higher, the cooling of the bigger electronic product that is suitable for generating heat.

In the patent No. is in the Chinese utility model patent of ZL 200620004257.5, discloses a kind of wide impeller centrifugal blower.This wide impeller centrifugal blower comprises and is built-in with external rotor electric machine, impeller width wherein is 140mm to 340mm, make the exhaust air rate and the blast of the relief opening of centrifugal blower that an efficient and rational combination be arranged, reduced noise simultaneously, adapted to the demand of great-power electronic electric power sink.In addition, be in the Chinese utility model patent of ZL 200720048740.8 in the patent No., a kind of dual-duct centrifugal fan is disclosed.The motor that it comprises fan blade, fan blade protecgulum, fan blade bonnet, motor, be made up of front cover, coil sleeve and rear end cover is installed inner casing and motor housing, wherein the two-sided fan blade of fan blade for being made up of front vane, rear blade and the middle isolating substrate between front vane and rear blade; The preceding air chamber at front vane place communicates with the main wind passage of fan blade protecgulum, and the auxiliary air channel of motor windings that the rear gas chamber at rear blade place forms with the suction port to opening and fan blade bonnet that inner casing is installed by the opening of motor housing rear end, motor and its air-flow can be flowed through communicates.This centrifugal blower can satisfy the requirement of more high-power air quantity, blast.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of centrifugal blower that is applied to filed of air conditioning.The outlet and inlet open area of this centrifugal blower can realize higher air-supply efficient than through optimal design.

For realizing above-mentioned purpose, the utility model adopts following technological scheme:

A kind of centrifugal blower comprises motor, casing and a plurality of blade, and wherein motor and blade are positioned at the space that casing surrounds, and motor is installed in the central shaft position, and a plurality of blades are evenly distributed in the rotating shaft of motor, it is characterized in that:

Described casing is made up of shroud and hub disk, and the circular hole in the middle of the wherein said shroud is an intake grill, and the gap between a plurality of described blades is an exhaust outlet;

Described exhaust outlet is 7: 4 with the ratio of the area of intake grill.

Centrifugal blower provided by the utility model has rational outlet and inlet open area ratio, so air quantity is big, energy consumption is low, noise is low, is fit to be installed in the intelligent aeration heat-exchange system of occasions such as computer room, communication base station.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is the plan view of centrifugal blower provided by the utility model;

Fig. 2 is the side view of centrifugal blower provided by the utility model;

Wherein the arrow among Fig. 1 and Fig. 2 is depicted as wind direction.

Embodiment

As depicted in figs. 1 and 2, centrifugal blower provided by the utility model comprises motor 1, casing 2 and a plurality of blade 3.Wherein, motor 1 and a plurality of blade 3 are positioned at the space that casing 2 is surrounded, and motor 1 is installed in the central shaft position of whole centrifugal blower, and blade 3 is evenly distributed in the rotating shaft of motor 1.Casing 2 is made up of the shroud 21 and the hub disk 22 of annular.Shroud 21 is riveted together by blade 3 with hub disk 22, becomes as a whole, links together by screw 4 with motor again, is spirally connected the position on hub disk 22.Air-out mode around this centrifugal blower adopts, wherein the circular hole in the middle of the shroud 21 is an intake grill 5, the gap between a plurality of blades 3 is an exhaust outlet 6.

In the embodiment shown in fig. 1, blade 3 is slightly curved, and one has 6.This blade can be made dextrorotation and left-handed two kinds of forms, promptly faces from motor one side, if impeller turns clockwise, is called the right rotation blower fan; If impeller is rotated counterclockwise, be called the anticlockwise blower fan.The concrete shape of blade can adopt the ripe design proposal of existing high-speed fan, has not just given unnecessary details in detail at this.

The motor 1 that uses in this centrifugal blower can adopt multiple existing matured product, as BLDC motor and PMSM motor etc.Casing 2 and blade 3 can adopt aluminum-magnesium alloy in light weight, that intensity is high to make, thereby make whole centrifugal blower light durable, and be not fragile.

In the intelligent aeration heat-exchange system, the main effect of this centrifugal blower is to be used for air draught.Particularly, blade 3 is high speed rotating under the drive of motor 1, and the air in blower fan the place ahead is sucked in the blower fan by intake grill, blows out from blower fan interlobate exhaust outlet radially again.Like this, after a large amount of air in intake grill the place ahead axially entered cavity in the blower fan along blower fan, instantaneous turning under the effect of blade entered the formed exhaust passage of blade and blade, at the supercharging air in a flash that air turns to, discharge along blower fan exhaust outlet radially again.The pressure reduction of blower fan inside makes the air in blower fan the place ahead flow into intake grill endlessly, flows out from exhaust outlet again.In this centrifugal blower, through meticulously calculating and comparative test repeatedly, the ratio of determining air port and the area of intake grill is 7: 4.This rational outlet and inlet open area can realize higher air-supply efficient than making this centrifugal blower possess the advantage that air quantity is big, energy consumption is low, noise is low.

More than novel centrifugal blower fan provided by the utility model is had been described in detail.For one of ordinary skill in the art, any conspicuous change of under the prerequisite that does not deviate from the utility model connotation it being done all will constitute to the utility model infringement of patent right, with corresponding legal responsibilities.

Claims (2)

1. a centrifugal blower comprises motor, casing and a plurality of blade, and wherein said motor and described blade are positioned at the space that described casing surrounds, and a plurality of described blades are evenly distributed in the rotating shaft of described motor, it is characterized in that:

Described casing is made up of shroud and hub disk, and the circular hole in the middle of the wherein said shroud is an intake grill, and the gap between a plurality of described blades is an exhaust outlet;

Described exhaust outlet is 7: 4 with the ratio of the area of described intake grill.

2. centrifugal blower as claimed in claim 1 is characterized in that:

Described casing and described blade all adopt aluminum-magnesium alloy.

Images