JPS5877198A - Blower - Google Patents

Abstract

PURPOSE:To increase the blowing capacity by installing a rectifying vane wheel which is revolved in the opposite direction onto that of the blowing vane wheel, by the air flow generated by a blowing vane wheel. CONSTITUTION:A blowing vane wheel 5 is installed onto the rotary shaft 4 of a motor 2 installed onto a frame 1 by means of a supporting piece 3. A supporting shaft 8 is screwed into the front side center part of the boss 6 of the blowing vane wheel 5, and a boss 11 is fitted around the top edge part of the supporting shaft 8 through a ball bearing 9, and vanes 12 twisted in the opposite direction to the vane 7 of the blowing vane wheel 5 are projected from the periphery of the boss 11, and thus a rectifying vane wheel 10 is formed. When the blowing vane wheel 5 is revolved by driving a motor 2, and air stream flowing from the front area to the rear area of the frame 1 is generated, and the rectifying vane wheel 10 is revolved in the opposite direction to the vane wheel 5 by said air stream which passes through the frame 1. As a result, tubulent flow or stagnant flow is eliminated, and the blowing capacity is increased.

Description

[Detailed description of the invention] The present invention relates to a blower that blows air using an impeller.

It is hard to say that this conventional spear blower has sufficient air blowing capacity. For example, use a ventilation fan, which is a type of blower.
When exhausting indoor smoke or contaminated air outdoors,
Smoke may build up in front of the ventilation fan, preventing indoor contaminated air from being exhausted quickly.

SUMMARY OF THE INVENTION In view of the conventional situation as described above, an object of the present invention is to provide an air blower with high air blowing capacity.

In order to achieve the above object, the present inventor closely observed the state in which smoke was accumulated in front of the ventilation layer and found that the airflow generated by the ventilation fan was turbulent at the position where smoke was accumulated. It was discovered that there was a slight stagnation. Therefore, when we experimented by attaching a rectifying impeller to the ventilation fan that rotates in the opposite direction to the impeller of the ventilation fan due to the air flow generated by the ventilation fan, we found that the turbulence or stagnation mentioned above disappeared and the air flow in front of the ventilation fan disappeared. Smoke was expelled quickly and the air blowing capacity was increased.

Note that if an impeller is attached that rotates in the same direction as the impeller of the ventilation fan, the above-mentioned turbulence or stagnation will increase and the air blowing capacity will decrease.

That is, the present invention is a blower characterized by being provided with a rectifying impeller that rotates in the opposite direction to the blower impeller due to the air flow generated by the blower impeller rotationally driven by the prime mover.

As is clear from the above experimental results, the blower of the present invention has a high air blowing ability. It is also possible to easily manufacture an existing blower by attaching a rectifying impeller.

Next, examples of the present invention will be described.

The ventilation ash of this example, as shown in FIGS. 1 and 2, is a ventilation fan that is used by being fitted into an exhaust hole provided in the wall of a restaurant or general home. This ventilation fan is a type of original 1ltII machine with a motor in the center inside the frame (1) that fits into the exhaust hole in the wall. (2) is attached to the rotation shaft (4) of the motor (2) using the four support pieces (3), and the center I on the rear side of the boss (6)
L? Screw the parts together and attach the four blades (7) to the surface of the boss (6).
are protruded at equal intervals to constitute a blower impeller (5).

Screw the spindle (8) to the center of the front side of the boss (6) of the blower impeller, coaxially with the rotating shaft (4) of the motor, and attach the ball bearing (9) to the tip of the spindle (8). Through the annular boss a
One blade SO twisted in the opposite direction to the blade (7) of the blower impeller is attached to the surface of this boss αυ, which is fitted with η and is rotatably provided.
The rectifying impeller Q□ is constructed by protruding the blades a at equal intervals.

When this ventilation fan is operated, the rotational drive of the motor (2) rotates the blower impeller (5), which has blades (7) radially attached to the boss (6), and blows air from the front of the frame (1) to the rear. A flow is generated, and this air flow passing through the frame (1) causes the rectifying impeller Ql mounted radially on the boss 0υ to rotate in the opposite direction to the blower impeller (5).

This ventilation fan is equipped with a rectifying impeller OQ that rotates in the opposite direction to the blowing impeller (5) due to the airflow generated by the blowing impeller (5), so it is different from conventional products that do not have such a rectifying impeller. It has a high air blowing capacity and can quickly exhaust indoor contaminated air. Moreover, the rectifying impeller 01 can be attached to an existing conventional ventilation fan to easily manufacture the fan.

In the above illustrated embodiment, the rectifying impeller OI is provided on the suction side of the blower impeller (5), but it may also be provided on the discharge side of the blower impeller. , other blowers may be used.

[Brief explanation of the drawing]

FIG. 1 is a front view of a blower and ventilation fan according to an embodiment of the present invention, and FIG. 2 is a partially longitudinal side view of the same ventilation fan. 2: Motor, prime mover 5: Blower impeller 10: Rectifier impeller Figure 1 Figure 2

Claims (1)

[Claims] A blower characterized by being provided with a rectifying impeller that rotates in the opposite direction to the blower impeller due to the air flow generated by the blower impeller that is rotationally driven by a prime mover.