CN1223306C

CN1223306C - Centrifugal blower for vacuum cleaner

Info

Publication number: CN1223306C
Application number: CN 02121059
Authority: CN
Inventors: 金德镇
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2002-05-31
Filing date: 2002-05-31
Publication date: 2005-10-19
Anticipated expiration: 2022-05-31
Also published as: CN1461628A

Abstract

The present invention relates to a centrifugal blowing device for a suction cleaner, which comprises a motor provided with a stator, a rotor and a rotary shaft, and guide blades, wherein a movable impeller is arranged on the rotary shaft, a fixed impeller is arranged on the periphery of the movable impeller, and the guide blades can guide air exhausted by the fixed impeller into a motor. A ventilation slot is arranged on a disc at the bottom end of a device housing between the guide blades and an electrode hood. A spacer plate which is positioned at the bottom end of the device housing and is capable of guiding air to flow inside the stator is provided with a ventilation slot. The disc which is at the bottom end of the device housing outside the spacer plate is provided with a ventilation device for guiding air to flow into the center of the stator. The present invention has the advantages that the structure is simple, the overheating of the stator due to operation can be prevented, and the cooling efficiency of the motor can be effectively improved.

Description

Centrifugal blower for vacuum cleaner

Technical field

What the present invention relates to is the invention of relevant dust catcher, particularly be the invention of centrifugal blower for vacuum cleaner.

Background technology

The formation of existing dust catcher comprises that as shown in Figure 1, this structure includes the dust catcher seal closure 110 with suction inlet 102 and outlet 104; Air is drawn into seal closure 110 inner centrifugal blowers 120 with the control of dust thing; Place the dust storage chamber 130 of the control of dust thing being collected and sucking in dust bag 132 is arranged between suction inlet 102 in the seal closure 110 and the centrifugal blower 120; Between dust storage chamber 130 and centrifugal blower 120, filter screen 134 formations such as grade that have air that the outlet 104 of seal closure 110 is discharged to purify.

Above-mentioned centrifugal blower 120 as shown in Figure 2, its structure comprises, has the end cap 20 of each suction inlet 20a and outlet 20b; , can be from the movable vane wheel 13 of suction inlet 20a suction air; Decide impeller 16 with what movable vane was taken turns 13 inhaled air boost in pressure; The guide vane 18 of the air of impeller 16 by end cap 20 outlet 20b discharge decided in guiding; By the air cooling of guide vane 18, drive motor 140 formations such as grade that movable vane wheel 13 and rotating shaft 6 rotate.Motor 140 is positioned at motor hood 8, and stator 146 is installed in it, and the stator 146 inner rotors 4 that insert a connection rotating shaft 6 when connecting power supply, form magnetic field between stator 146 and the rotor 4, and under the effect of magnetic field, rotor drives rotating shaft 6 rotations.There is ventilation slot 150 inboard, front that is positioned at motor hood 8, and this ventilation slot 150 is to be sucked into air in the motor hood 8 by guide vane 18 in stator 146 flows inside.

The centrifugal blower of above-mentioned structure, when motor 140 work, rotating shaft 6 rotations of motor 140 drive 13 rotations of movable vane wheel, make air be drawn into end cap 20 inside by the suction inlet 20a of end cap 20, take turns 13 the vertical break-in of centrifugal force and be sent to by movable vane afterwards and decide impeller 16, like this, flow air is by deciding to be discharged to the outlet 20b of end cap 20 through guide vane 18 after impeller 16 adherence pressures.At this moment, owing to decide the pressure that impeller 16 promotes air, will produce pressure differential in that end cap 20 is inside and outside, this pressure differential will produce the powerful inhalation power of suction dust suction thing to seal closure 110 inside.The air of end cap 20 is discharged to the outside by the outlet 8a of motor hood 8 one sides and the outlet 104 of seal closure 110 behind cooling motor 140.

But, prior art dust catcher pressure fan, make the air that is drawn into motor hood 8 inside, flow around only when machine operation, producing hot rotor 4 and the air gap G between the stator 146 and rotor 4, form the flowing space of ventilation slot 150 relatively, the problem that the heat that exists stator 146 and 146a unshakable in one's determination to produce because of work can't fully be cooled off.

Summary of the invention

The objective of the invention is to overcome above-mentioned technical deficiency, provide a kind of and can guide the iron core that flow into stator from the air of end cap outlet discharge,, improve the centrifugal blower for vacuum cleaner of motor cooling effectiveness in case fastening is overheated.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of centrifugal blower for vacuum cleaner, its structure includes stator, the motor of rotor and rotating shaft, the movable vane wheel is housed on the rotating shaft, decide impeller and be contained in the periphery that movable vane is taken turns, the air of deciding the impeller discharge is directed to the guide vane of motor, cowl cover bottom between guide vane and motor hood includes the ventilation slot device of dish, the ventilation slot device comprises that also being positioned at the cowl cover bottom also can guide the concentrated dividing plate to the stator flows inside of air, has the guiding air to flow into the ventilation unit of stator core on the dish of cowl cover bottom, the dividing plate outside.

The invention has the beneficial effects as follows: because through-hole section that is connected with stator core and introduction part from formation to the specific direction of stator core that protrude are arranged on the ventilation slot of the present invention, can make air via through holes portion and introduction part be directed to stator core by guide vane, thereby prevent that stator is overheated because of work produces, and improve the advantages such as cooling effectiveness of motor.

Description of drawings

Fig. 1 is the cross-sectional view of existing dust catcher;

Fig. 2 is the cross-sectional view of existing centrifugal blower for vacuum cleaner;

Fig. 3 is ventilation slot front view and the vertical view among Fig. 2;

Fig. 4 is the cross-sectional view of centrifugal blower for vacuum cleaner of the present invention;

Fig. 5 is ventilation slot front view and the vertical view among Fig. 4;

Fig. 6 is the example cross-section structural representation of centrifugal blower for vacuum cleaner of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are further described: centrifugal blower for vacuum cleaner of the present invention, as shown in Figure 4, its structure includes inside stator 2, rotor 4, and there is the motor 10 of rotating shaft 6 its outside, forms electromagnetic force between its stator 2 and rotor 4.Rotating shaft 6 ends at motor 10 possess the connecting axle 11 that is connected with coupling 14.With connecting axle 11 peripherals the movable vane wheel 12 that keeps same direction spacing and form a plurality of formations such as blade 13 grades is arranged, movable vane wheel 12 is contained on the rotating shaft 6.Keep a determining deviation with the radial direction of movable vane wheel 12, can promote the periphery that impeller 16 is contained in movable vane wheel 12 of deciding of sending air pressure by movable vane wheel 12, and decide impeller 16 bottoms formation one.The air of deciding impeller 16 discharges is directed to the guide vane 18 of motor 10.Cowl cover 22 bottoms between guide vane 18 and motor hood 8 include dish 25 at interior ventilation slot device 24.Ventilation slot device 24 comprises that also being positioned at cowl cover 22 bottoms also can guide the concentrated dividing plate 23 to the stator flows inside of air, makes and concentrates around stator 2 inboards and rotor 4 mobile by end cap 20 outlet 20b to motor hood 8 inner leaked-in airs.On the dish 25 of dividing plate 23 outside cowl covers 22 bottoms, there is the guiding air to flow into the ventilation unit 30 of stator 2 iron cores 1.

Around motor 10 outsides be motor hood 8, the suction inlet 8a that the air of guide vane 18 is flowed into to inside is arranged in its front, the outlet 8b that air is discharged to the outside is arranged at its rear side.

In the place ahead of motor hood 8, protection movable vane wheel 12 is installed, decide the end cap 20 of impeller 16 and guide vane 18; the front of end cap 20 forms the suction inlet 20a that sucks air to inside; the back of end cap 20, that is, the front of motor hood 8 forms the outlet 20b that is connected with motor hood 8 suction inlet 8a.

Above-mentioned ventilation unit 30 includes the through-hole section 32 of the iron core 1 that leads to stator 2 and the introduction part of protruding at the oriented stator 2 unshakable in one's determination 1 of through-hole section 32 1 sides 34.Ventilation unit 30 is subjected to the guiding of guide vane 18, with a part in the air of end cap 20 outlet 20b discharge, flows into to the iron core 1 of said stator 2 by above-mentioned through-hole section 32 and introduction part 34, can be to iron core 1 heat release of stator 2 during machine operation..

Above-mentioned ventilation unit 30 forms the gas port 1a that a plurality of perforations are arranged along the length direction of stator 2 iron cores 1 as Fig. 5 and shown in Figure 6, and above-mentioned introduction part 34 forms and the corresponding setting of gas port 1a incline direction, and has the inclined-plane of connection.That is, by through-hole section 32 leaked-in airs, under the guiding of introduction part 34, because of the gas port 1a of stator 2 iron cores 1 has determined to flow into the flow direction of air, so flow into the cooling performance that the air of the gas port 1a of stator 2 iron cores 1 more can improve air.The gas port 1a of stator 2 iron cores 1 forms a plurality of by the certain intervals of circumferencial direction, also form a plurality of gas ports corresponding with gas port 1a on ventilation unit 30.

Below the course of work of the present invention is described:

Motor 10 is connected external power source, produces electromagnetic force between stator 2 and the rotor 4, rotor 4 and rotating shaft 6 rotations, and the rotation under rotor 6 drives of movable vane wheel 12, the movable vane wheel 12 of rotation is drawn into air the inside of end cap 20 from the suction inlet 20a of end cap 20.

At this moment, inhaled air along rotating shaft 6 axially, send strongly to the outside of blade 13 by the blade 13 of movable vane wheel 12, air when decide impeller 16, make its boost in pressure after, again by guide vane 18, through the outlet 20b of end cap 20 discharge.Therefore, in the inside and outside generation pressure differential of end cap 20, this pressure differential will produce the inhalation power that sucks the dust suction thing.

The air that the outlet 20b of end cap 20 discharges, the suction inlet by motor hood 8 sucks, and stator 2 and rotor 4 that big calorimetric takes place during to machine operation carry out heat release, are discharged to the outside from the outlet 8b of motor hood 8.

In the dust catcher course of work, flow into the air of motor 8 inside, dividing plate 23 by ventilation slot device 24, medial surface at stator 2 flows, and to being positioned at other parts heat release of stator 2 inboards, in addition, because above-mentioned air is by the through-hole section 32 and introduction part 34 effects of ventilation unit 30, can flow into a side of stator 2 iron cores 1, make stator 21 parts unshakable in one's determination be able to heat release.Particularly, as shown in Figure 6, when forming gas port 1a on the iron core 1 of stator 2, the structure of introduction part 34 can make air can flow into gas port 1a smoothly, makes gas port 1a be free air-flow to go into, and can reduce motor because of the heat that work produces, and can improve cooling effectiveness effectively.

Claims

1. centrifugal blower for vacuum cleaner, its structure includes stator (2), the motor (10) of rotor (4) and rotating shaft (6), movable vane wheel (12) is housed on the rotating shaft (6), decide impeller (16) and be contained in the periphery that movable vane is taken turns (12), the air that to decide impeller (16) discharge is directed to the guide vane (18) of motor (10), cowl cover (22) bottom between guide vane (18) and motor hood (8) includes the ventilation slot device (24) of dish (25), it is characterized in that ventilation slot device (24) comprises that also being positioned at cowl cover (22) bottom also can guide the concentrated dividing plate (23) to the stator flows inside of air, has the guiding air to flow into the ventilation unit (30) of stator (2) iron core (1) on the dish (25) of cowl cover (22) bottom, dividing plate (23) outside.

2. according to the device described in the claim 1, it is characterized in that described ventilation unit (30) includes through-hole section (32) of leading to stator (2) (1) unshakable in one's determination and the introduction part of protruding at the through-hole section oriented stators of (32) one sides (2) (1) unshakable in one's determination (34)

3. according to the device described in the claim 2, it is characterized in that having at stator (2) (1) length direction unshakable in one's determination the gas port (1a) of a plurality of perforations, introduction part (34) is pressed the corresponding setting of gas port (1a) incline direction.