JPH01184357A - Window fan - Google Patents

Abstract

PURPOSE:To reduce a depth and to increase a velocity of flow of discharge air through a center part, by a method wherein a tubular speed regulating ring having a conical surface with an inner peripheral surface narrowed toward the front of a vane and flow straightening gratings arranged radially from the inner peripheral surface of the speed regulating ring are situated in the front of the vane. CONSTITUTION:A speed regulating ring 5 positioned to the front of a vane 4 secured on the indoor side of a body 1 is formed in a tubular manner, and an inner peripheral surface 5a is formed in a conical surface narrowed toward the front of the vane 4. Flow straightening gratings 6 each having the one end secured to the inner peripheral surface 5a of the speed regulating ring 5 and the other end extended toward the axial central line of the vane 4 are arranged radially. With a motor 3 run, the vane 4 is rotated, air on the outdoor side flows through a filter 2 for purification, and is discharged to the indoor side. Since the area of a discharge air flow passage is gradually decreased toward a course of air, a velocity of flow at a central part is increased. The flow straightening gratings 6 straighten the flow of discharge air. Since the flat motor 3 is used and the speed regulating ring 5 with a thin section is employed, this constitution enables decrease of the whole depth of a device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wind fan, and a wind fan whose flow velocity is increased by 50%.

[Conventional technology]

There are two types of wind fans: those using line flow fans and those using propeller fans.

It is conceivable to use accelerating blades as a wind fan that increases the flow velocity of the blowing air with a propeller fan. This is similar to what is applied to electric fans, and by providing an accelerating blade in front of the two blades, the flow velocity of the blown air is increased.

[Problem to be solved by the invention]

Conventional wind fans such as those mentioned above, especially wind fans that use propeller fans, have an acceleration blade in front of the two blades, so there is a problem that the overall depth dimension is large and the appearance is spoiled. .

This invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a wind fan that can reduce the overall depth dimension and increase the flow velocity of air blowing from the center.

[Means to solve the problem]

The wind fan according to the present invention includes a tubular regulating ring in front of the two blades, the inner circumferential surface of which has a conical surface that tapers toward the front of the blades, and a tubular regulating ring arranged radially from the inner circumferential surface of the regulating ring. A rectifying grid is provided.

[Effect]

In this invention, the opening area of the regulating ring is formed to become narrower as the distance from the blade increases.

The wind blown out by the blades is compressed within the regulating ring and the flow speed increases.

〔Example〕

Figures 1 to 4 are diagrams showing one embodiment of the present invention.
2 is a sectional view taken along the line ■--■ in FIG. 1, FIG. 3 is an enlarged front view of the regulating ring portion, and FIG. 4 is a partially cutaway side view of FIG. 3.

In the figure, (l) is the main body, (2) is a dust removal filter provided on the outside of the main body 100, (3) is a flat DC brushless motor fixedly installed inside the main body (11), and (4! is a vane directly connected to the motor (3), and (5) is a regulating ring fixedly installed on the indoor side of the main body (1) and placed in front of the vane (41), which is formed in a tubular shape and whose inner peripheral surface ( 5a) is a feather (4)
It is formed into a conical surface that tapers toward the front. (
6) is a radially arranged rectifying grid having one end fixed to the inner circumferential surface (5a) of the regulating ring (5) and the other end extending in the direction of the axial center iK of the blade (4).

In the wind fan configured as described above, when the motor (3) is driven, one blade (4) rotates.

The air outside the room passes through the filter (2), is purified, and is blown out into the room. Since the flow path area of the blowing air becomes narrower as the wind travels, the flow velocity at the center increases.

Further, a rectifying grid (61) rectifies the blown air.

In this way, using a flat motor (3),
Since the thin regulating ring (5) is used, it is possible to reduce the depth of the entire device.

〔Effect of the invention〕

As explained above, in this invention, in front of the two blades, there is provided a tubular regulating ring having an inner peripheral surface having a conical surface that tapers toward the front of the blade, and a tubular regulating ring arranged radially from the inner peripheral surface of the regulating ring. A rectifier grid was installed.

By simply using a thin governor ring, the overall depth of the device can be reduced and the flow velocity of the air blowing from the center can be increased.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of a wind fan according to the present invention, FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1, and FIG. 3 is an enlarged front view of the top portion of the speed regulator in FIG. FIG. 4 is a two-part cutaway side view of FIG. 3. In the figure, (3) is the motor, (4J is the blade, (5) is the regulating ring, (5a) is the inner circumferential surface, and (6) is the rectifier grating. The same symbols in the two figures indicate the same parts. .

Claims (1)

[Claims] It has a blade that is driven by a motor and has one side facing the indoor side and the other side facing the outdoor side, and a conical surface that is provided in front of the blade and has an inner circumferential surface that tapers toward the front of the blade. A wind fan comprising a speed regulating ring formed in a tubular shape, and a rectifying grid protruding from the inner circumferential surface of the regulating ring and arranged radially from the inner circumferential surface toward the axial center line of the blade. .