JPS6060298A - Motor fan - Google Patents

Abstract

PURPOSE:To eliminate the disturbance of air stream near a suction port due to collision against a nut securing an impeller and improve ventilating efficiency with a simple structure by a method wherein a conical guide is provided in continuous to the substantially conical inlet port guide of the impeller. CONSTITUTION:The substantially conical inlet port guide 14 is provided at the suction part of the impeller 9 and the conical guide 17 is attached continuously to the inlet port guide 14 by fitted forcibly to the nut 15 securing the impeller 9. According to this method, the air stream, flowing into the impeller 9 through the suction port of the impeller 9, is guided at first by the conical guide 17 and begins to enter smoothly, thereafter, flows smoothly to the inlet port guide 14 of substantially conical shape and the inside of the impeller 9. Accordingly, the air stream near the suction port will never be disturbed by colliding against the nut 15 securing the impeller 9 and, therefore, the ventilating efficiency may be improved with the simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric blower that has improved blowing efficiency and can be used in vacuum cleaners and the like.

Conventional Example (Definition and Problems) A conventional electric blower has an IW configuration as shown in Figure 1. 1 has one impeller, 2 has an air guide, and 3 has two impellers. The air guide 2) is a casing. The casing 3 is provided with a suction port 4, and the opening 1H1 on the opposite side of the suction port 4 is press-fitted into the motor 5 to fix the casing 3.

A substantially circular button-shaped guide 6 is provided in the suction section of the impeller 1, and the injector 1 is fixed to the motor shaft 8 by tightening the throat through this substantially conical guide 6. It has become 111 years old.

Now, if we pay attention to the area around the nut 7 in the suction section of the impeller 1, we can see that there are 1.10 points as shown below. That is, the substantially conical guide 6 directs the airflow to
(Despite having a 1"7i configuration, the inhaler I VC seems to be guided into the inside of the impeller 1. The collision with the Renote TV, which has a shape that obstructs the airflow, causes the flow to become turbulent around the Nano 1-7.This turbulence is one of the factors that reduces the blower's efficiency. It had become.

OBJECTS OF THE INVENTION The present invention aims to provide a complete 71J dynamic air blower with improved air blowing capacity of ¥h L+· by improving the shape of the suction port.

An electric blower according to the present invention is provided with a conical kite that forms a conical shape following a substantially conical inlet guide that is fixed by l nano 1- provided at the suction port of the impeller. As a result, the tip f111 of the motor center 4Il is covered (this is what is called E1 formation).

Separately from the approximately conical entrance guide, the tip part 1 &
Since the circular button-shaped guide is added, the flow in the region of the suction air l″Ilε becomes smoother, resulting in a high air blowing efficiency.

DESCRIPTION OF EMBODIMENTS In the above, an embodiment of the present invention will be described with reference to FIGS. 2 and 3. In the figure, 9 is an impeller, 10 air guides, 11i'' 1 Impeller 9 and air guide 10
It is a casing that covers the Casing 11 suction ports 12
E1 is connected to the motor 13 at the suction port 12 and lfl M on the Σnuka side and fixed.

The suction port of the impeller 9 has a substantially conical shape (=1 guide 1
4, and the entire impeller 9 is fixed to the motor shaft 16 by being tightened with a nut 16 via this substantially conical artificial guide 14.

A conical guide 17 is attached to the nut 15, which covers the nut and the tip of the motor shaft 16, and is attached to the nut 15. It is being

To explain the operation based on the formation of 1111i, air starts to be sucked in from the suction port 112 of the impeller 9, or air tries to flow into the RIX inside the impeller 9 from the suction [1 part] of the impeller 9. 2] Kisho Q: ↓First, he was guided by Enka-jo Kaito-17 and began to enter Storrs, and from then on,
The entrance guide 14, which has a substantially circular shape, and the interior of the invera 9 and the
In this way, in the embodiment of the present invention, the airflow starts at F?lL where the airflow starts to be sucked, so the air blowing efficiency is 1.1. There is a lack of power to become.

? z: tz-1-jl In the example described, rJ circle γ1・shape chi 1
Although we have shown an example in which the lug is press-fitted into the lug 1-15 and fixed, it is also possible to form a conical guide integrally with the leat, and the motor shaft including the lug nut i. All you need is a circular guide that can hold 1 x f1.1 (1 x x 1).

Effects of the Invention According to the present invention, as is clear from the above embodiments, a conical guide having a conical shape is provided following the substantially conical inlet guide, so that the suction [liτl(( −
Since there is no possibility that the airflow near the impeller will hit the nut with the impeller fully fixed by 1 and be affected by τ, it is better to use an electric blower with high air blowing efficiency in 1j11 (111 "1"). You can get ZC products.

4. In 11-1 of the drawings, 311, light Fig. 1
I'':<-J-Main part fracture 1ゎr 1::+111ti Figure, Figure 2 v:1: An example of the electric blower invented by tree' and 1 Pond fracture full +f+, i Figure, Figure 3 The figure is the second
From the state shown in the figure, 11 Todoroi 1-like guide gold part is the main point 7 of the state
415 fracture (till figure and side view.

9... Impeller, 12... Suction fil, 14...
...Abbreviation l'l 1111 The person who barks [I Kaito, 16
...Natsuto, 16. River...7-〃11 songs, 17
...Yen'1114 missing guide.

Claims (1)

[Claims] The intake port of the inhaler has a substantially conical inlet guide, which is fixed to the motor shaft by tightening the nano 1 guide at the tip of the motor shaft, and is either integral with the nut or attached to the plate A. A conical guide forming a conical shape following the substantially conical inlet guide is provided to cover the tip of the motor shaft.