JPS62113899A - Motor blower for electric cleaner - Google Patents

Abstract

PURPOSE:To improve suction performance by providing an air reflecting plane enlarging the diameter as it leaves an intake for arranging in order air reflected from the air reflecting plane and conducting the air rearward. CONSTITUTION:An air guide 15 is constituted from an outer wall portion 15a surrounding the outer periphery of a fan 16, a blade portion 15b and a fixed plate portion 15c. Air from the fan 16 collides with the outer wall portion 15a, directed behind the fan 16, arranged in order by the blade portion 15b conducted behind the air guide 15 and discharged from a discharge port 13. The air colliding with the outer wall portion 15a does not provide swirling flow, but is discharged efficiently behind the air guide so that suction performance is improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an electric blower for a vacuum cleaner.

2. Description of the Related Art A conventional electric blower for a vacuum cleaner will be described with reference to FIG. In FIG. 4, reference numeral 1 denotes a vacuum cleaner body with a built-in electric blower, etc., and has an intake port 2 at the front and an exhaust port 3 at the side. An electric blower is disposed behind the intake port 2, and this electric blower is composed of an electric motor 4, an air guide 5, and a fan 6. The air guide 5 is composed of a cylindrical outer wall portion 5a that surrounds the outer periphery of the fan 6, a plurality of blade portions 5b that smoothly guides the air backward, and a fixing plate portion 5c that fixes the electric motor 4. There is. Reference numeral 7 denotes a highly elastic support gasket which is attached to the outer periphery of the air guide 5 and comes into contact with the inner wall surface of the front part of the cleaner main body 1, and has air tightness and vibration damping functions.

Problems to be Solved by the Invention In the conventional configuration described above, to explain the flow of air, the air sucked in from the intake port 2 is projected to the outer periphery by the fan 6, collides with the outer wall portion 5a of the air guide 5, The air is guided to the rear of the air guide 5 while being rectified by the blade portion 5b, and finally discharged to the outside from the exhaust port 3. Here, the air that protrudes from the fan 6 is rectified by the blade portion 5b of the air guide 5 and is smoothly discharged backward, but the blade portion 5b is located rearward than the fan 6, and The air protruding from the air guide 5 collides with the outer wall 5a of the air guide 5 and is directly reflected in the opposite direction, resulting in a one-group recirculation, which causes a reduction in suction performance.

Means for Solving the Problems In order to solve the above-mentioned problems, the electric blower for the vacuum cleaner of the present invention includes an electric motor and a fan that is rotationally driven by the electric motor and blows the air sucked from the intake port toward the outer circumference. an annular air reflecting surface that surrounds the outer periphery of the fan and gradually becomes larger in diameter as it moves away from the intake port; and an air guide that rectifies the air blown out from the fan and reflected by the air reflecting surface and guides it to the rear. The configuration includes the following.

Effect According to the above configuration, the air blown out from the fan hits the air reflecting surface that is inclined so that the rear side has a large diameter, and is reflected to the rear of the fan, so there is no swirling flow and the suction performance is improved. improves.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 3.

FIG. 1 is a sectional view of the main parts of a vacuum cleaner equipped with an electric blower according to an embodiment of the present invention, FIG. The main body of the vacuum cleaner is provided with an intake port 12 at the front and an exhaust port 13 at the side. An electric blower is disposed behind the intake port 12, and this electric blower includes an electric motor 14, an air guide 15, and a fan 16. The air guide 15 includes an outer wall portion 15a surrounding the outer periphery of the fan 16, a plurality of blade portions 15b located behind the fan 16, and a fixing plate portion 15c for fixing the electric motor 14. 17 is a support gasket made of an elastic body that is attached to the outer circumference of the air guide 15 and comes into contact with the inner wall surface of the front part of the cleaner body 11;
It has airtight and anti-vibration functions. The outer wall portion 15a of the air guide 15 is inclined such that the distance from the outer periphery of the fan 16 is longer on the rear side of the fan 16.

In the above configuration, to explain the flow of air, the air intake port 1
The air sucked in from the fan 16 is projected to the outer periphery by the fan 16, collides with the outer wall 15a of the air guide 15, is directed toward the rear of the fan 16, is rectified by the blade portion 15b, and is guided to the rear of the air guide 15. It is discharged to the outside from the exhaust port 13. In this way, the air that protrudes from the fan 16 and collides with the outer wall 15a of the air guide 15 does not form a swirling flow and is efficiently discharged to the rear of the air guide 15, improving suction performance.

FIG. 3 shows another embodiment, in which the outer wall portion 15a of the air guide 15 is not inclined;
a is covered with a support gasket 17, and the inner circumferential surface of this support gasket 17 is inclined so that the rear side has a larger diameter.
A similar effect can be obtained. moreover.

Inclining the inner circumferential surface of the support gasket 17 rather than inclining the outer wall portion 15a also has the effect of reducing component manufacturing costs. This is because when molding the air guide 15 with resin, the inclined outer wall 15a becomes an undercut, which complicates the mold structure and increases the cost. Better,
It is advantageous in terms of cost.

Effects of the Invention As described above, according to the present invention, the air blown out from the fan can be reflected by the air reflecting surface and sent to the rear of the air guide without causing a swirling flow, thereby improving the suction performance. be able to.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main parts of a vacuum cleaner equipped with an electric blower according to an embodiment of the present invention, FIG. 2 is an external perspective view of the main parts of the same electric blower, and FIG. FIG. 4 is a partially cutaway front view of the electric blower, and is a cross-sectional view of the main parts of a vacuum cleaner equipped with a conventional electric blower. 12...Intake port, 14...Electric motor, 15...Air guide, 15a...Outer wall part, 16...Fan,
17...Supporting Patsukin agent Yoshi Morimoto
Hiro 1st Fig. 14-Electric motor tS ~・ Engineering, 7- Katana "4 t. 9...Outer wall l B-Fan Fig. 3 1 Otsu 17--Support pad Nn

Claims (1)

[Scope of Claims] 1. An electric motor, a fan that is rotationally driven by the electric motor and blows air sucked in from an intake port toward the outer circumference, and an annular fan that surrounds the outer circumference of the fan and gradually increases in size as it moves away from the intake port. An electric blower for a vacuum cleaner, comprising: an air reflecting surface having a diameter; and an air guide that rectifies the air blown from the fan and reflected by the air reflecting surface and guides it to the rear. 2. The electric blower for a vacuum cleaner according to claim 1, wherein the air reflecting surface is constituted by an inner wall surface of an outer wall portion of the air guide. 3. The electric cleaner according to claim 1, wherein the air reflecting surface is constituted by the inner circumferential surface of a support packing made of an elastic body that covers the outer wall of the air guide and has the functions of vibration isolation and air tightness. Machine electric blower.