KR101592150B1

KR101592150B1 - Air amplifying fan

Info

Publication number: KR101592150B1
Application number: KR1020150140715A
Authority: KR
Inventors: 이영희
Original assignee: 이영희
Priority date: 2015-10-07
Filing date: 2015-10-07
Publication date: 2016-02-04
Also published as: WO2017061757A1

Abstract

The air-amplifying type fan includes a blowing tube having an inlet port passing through the center of the tube. An air flow means is provided in a base located below the blowing pipe, and an inlet passage is formed on the inner front side of the blowing pipe and the base, and a discharge passage is formed on the inner rear side. Outside air is introduced through an inlet formed above the front side of the blowing pipe and sucked into the air flow means and discharged again through a discharge port formed on the rear side of the blowing pipe toward the inlet port. The outside air is attracted to the attracting port by the fast air flow discharged to the discharge port and moved forward. In the present invention, the inlet is installed at a distance from the motor and the blowing fan, so that the noise diffused through the inlet is reduced. Also, a plurality of blowing fans are connected to the motor to provide a fan whose noise is reduced by discharging a sufficient amount of air even though the motor is driven at a low rotational speed.

Description

[0001] The present invention relates to an air amplifying fan,

The present invention relates to a method for solving the problem of weak wind power and noise of a conventional air-amplifying fan.

And more particularly to an air amplification type fan having improved air flow structure for reducing the noise of the motor and the fan. The present invention also relates to an air amplification type fan having two or more blowing fans connected to a blowing fan for generating an air flow, wherein the blowing fan connected to the motor is driven at a relatively low rotational speed, will be.

The fan that houses the rotating wings that generate the wind inside the casing of the net has a high risk of safety accidents that could injure children. An air-amplifying fan uses Bernoulli's principle that the speed of a liquid or gas passes through a narrow space. The motor is placed at the bottom of the product and the wind is blown out, and then the wind is blown into a circular narrow gap. There is an advantage that the wings are not exposed to the outside, and the cleaning is easy and safe. However, compared with the conventional fan, the noise is excessive and the generated wind can not spread far away.

WO 2010/035018 discloses an air amplification type fan. This fan is a device that emits airflow forward without wings exposed to the outside, solves the safety problem of a fan with a wing. The air introduced from the outside through the blowing fan installed in the base is passed through the nozzle portion provided with the inner flow path, and air is discharged through the mouth portion formed on the nozzle surface to the front nose surface, thereby attracting the outside air around the nose surface. As a result, there is an effect that the air flow discharged through the mouth part attracts the ambient air around, thereby amplifying the overall blowing amount blown by the fan.

The air-amplifying fan is capable of amplifying the air blown by moving the outside air to the inside of the nozzle by using the low pressure formed inside the nozzle, unlike the fanless fan described in Japanese Patent No. 56-167879, Energy efficiency is high.

1, the conventional air amplification type fan 1 includes a base 2, a blowing fan 5 incorporated in the base, and a nozzle 3 provided on the base 2. [ The base 2 is provided with an air inlet 4, which is formed along the periphery of the base 2. The blowing fan 5 is connected to the air intake port 4 at its inlet side and to the internal flow path 6 of the nozzle 3 at its outlet side. The air blowing fan 5 sucks outside air from the air inlet 4 and moves along the outer circumferential surface of the blowing fan 5 and then discharges the air D2 to the inner flow path 6 of the nozzle 3, (D3). The nozzle 3 having an opening formed in its central portion includes an inner flow path 6 formed along the circumferential direction and a mouth portion 7 formed from the inner flow path 6 toward the inside of the nozzle. The air supplied to the internal flow path 6 by the blowing fan 5 is discharged (D4) through the mouth part 7 at a high flow rate forward. When the air is rapidly discharged to the inside of the nozzle 3, the pressure of the opening formed inside the nozzle 3 is lowered, and the attracting airflow D5 in which the air in the rear portion of the nozzle 3 moves toward the opening is formed do. The draft airflow D5 formed in the opening of the nozzle 3 is continued while the blowing fan 5 is operated and the draft airflow D5 which is formed in the opening of the nozzle 3 continues to flow the draft airflow 5 D5 move forward to increase the blowing effect of the air amplification type fan 1. [

On the other hand, the air-amplifying fan 1 has a problem of high noise. High noise is generated when the blades of the motor and the blowing fan 5 rotate at a high speed and this noise is easily diffused to the outside through the air intake port 4 formed around the outer surface of the base 2 (D6). It is difficult to prevent noise transmitted to the outside due to the structural characteristics of the motor and the air blowing fan 5 provided on the near side of the air inlet 4. [

The present invention has been devised to improve the air flow structure and to reduce the spread of the noise generated by the motor and the blowing fan to the outside. In addition, two or more blowing fans connected to the motor to generate air volume are connected to the motor so that the fan is driven at a relatively low rotational speed, but the blowing fan connected thereto discharges a sufficient amount of air, An amplifying fan can be provided.

Registered patent: 10-1038000 (electric fan). Registered Patent: 10-0985378 (Wingless Air Circulation Blower). Open Patent: 10-2012-0104784 (safety fan with nozzle tube). Open Patent: 10-2013-0013892 (Wingless Fan).

The air amplification type fan has a problem that the air volume is weak and high noise is generated.

The noise generated by the conventional air amplification type fan is diffused to the outside through the air intake port formed around the outer surface of the base. It is difficult to prevent noise transmitted to the outside due to the structural characteristics of the motor and the blowing fan provided near the air inlet.

In the conventional air amplification type fan, a single blowing fan is connected to the motor so that the motor is required to be driven at a high rotational speed in order to discharge a sufficient air flow rate. Therefore, the noise generated by the motor and the blowing fan rotating at high speed is large.

An object of the present invention is to provide an inlet of a fan for sucking outside air at a relatively large distance from a motor and a blowing fan to reduce noise diffused through the inlet. Another object of the present invention is to provide an air amplification type fan having a plurality of blowing fans connected to a motor so that the fan discharges a sufficient amount of air to reduce noise even though the motor is driven at a relatively low rotational speed.

According to an aspect of the present invention, an air-amplifying fan includes a base; An air flow means located in the base for generating an air flow; A blowing pipe mounted on an upper region of the base and having an inlet port passing through the center of the tube so that outside air is drawn from the rear and discharged forward; An inflow passage formed in the inner front side of the blowing pipe and through which the air introduced from the outside flows into the air flow means; An inlet formed on an upper outer side surface of a blowing pipe for guiding outside air into the inflow passage; A discharge passage through which air discharged from the air flow means flows into a space formed on the inner rear side of the blowing pipe; A discharge port formed on the rear side of the blowing pipe toward the inlet port for discharging the air in the discharge passage to the outside; And a blocking wall which is provided to extend from the blowing pipe and the base to block the air flow between the inflow passage and the discharge passage.

The air flow between the inflow passage and the discharge passage is possible only by the air flow means passing through the blocking wall and the air in the discharge passage is discharged from the rear side to the discharge port forward.

The blowing pipe is connected to be detachable from the base.

The distance between the open surfaces of the discharge ports is between 1 mm and 6 mm.

A filter is installed at the inlet to filter foreign substances contained in the outside air.

The air flow means comprises a blowing fan case; A blowing fan disposed in the blowing fan case; And a motor for driving the blowing fan.

Two or more blowing fans are connected to the motor, and when the fan is driven, the maximum rotational speed of the motor is preferably between 3,000 rpm and 12,000 rpm.

The fan according to the present invention has the following effects.

First, an inlet through which the outside air is sucked is installed at a relatively long distance from the motor and the blowing fan, and the noise diffused to the outside through the inlet is reduced.

In the conventional air amplification type fan, a single blowing fan is connected to the motor so that the motor rotates at a high speed in order to discharge a sufficient amount of air. However, in the present invention, a plurality of blowing fans are connected to the motor, It is possible to discharge the same amount of air as that of the conventional fan, and thus the noise is low.

1 is a sectional view showing a conventional air amplification type fan 1. Fig.
2 is a cross-sectional view showing the overall configuration of an electric fan 10 according to an embodiment.
3 is an enlarged perspective view of the inlet cover 42 and the filter 70. Fig.
4 is a front view of the fan 10 viewed from the front.

Other features and actions of the present invention will be described in detail with reference to the following examples.

3 is a perspective view showing an enlarged view of the inlet cover 42 and the filter 70. Fig. 4 is a front view of the fan 10 viewed from the front. Fig. 2 is a cross- to be.

In the drawings, the fan 10 includes a base 20 and a blowing tube 30 mounted in the upper region of the base 20. As shown in FIG. The base 20 is practically cylindrical and is provided with an air flow means 60 for generating an air flow therein. The blowing pipe (30) is connected to the base (20) so as to be detachable.

The blowing pipe 30 is formed in an annular shape forming an attracting hole 80 at the center, and an outer surface is formed by an inner surface of the outer surface wall, and an inner space through which air flows is formed between the outer surface wall and the inner surface wall. The inlet port 80 is an opening that passes through the center axis of the blowing tube 30 so that outside air is drawn from the rear of the blowing tube 30 and discharged forward. In other words, the inner wall corresponds to the surface surrounding the inlet port 80.

The internal space of the blowing pipe 30 is constituted by an inflow passage 40, a discharge passage 50, and a blocking wall 35. The overall shape of the inflow passage 40 and the discharge passage 50 is related to the shape of the blower pipe 30. [

The inflow passage 40 is a space formed in an annular shape on the inner front side of the blowing pipe 30 and is a passage through which the air introduced from the outside flows to the airflow means 60. An inlet 45 is formed in the upper outer side surface of the blowing pipe 30 to guide the outside air into the inflow passage 40. An inlet port cover 42 is provided in the air blowing pipe 30 so as to surround the inlet port 45 as a part of the upper outer surface of the air blowing pipe 30 and detachably attached to the other outer surface of the blowing pipe 30.

The discharge passage 50 is a passage through which the air discharged from the air flow means 60 flows into a space formed in an annular shape on the inner rear side of the blowing pipe 30. A discharge port 55 for discharging the air in the discharge passage 50 to the outside is formed in the rear inner side surface of the blowing pipe 30 from the discharge passage 50 toward the inside of the inlet port 80. The discharge port 55 is formed around a part of the rear side of the surface on which the inlet port 80 is formed, and its cross-sectional shape is generally circular.

A blocking wall 35 is provided between the inflow passage 40 and the discharge passage 50, that is, in the middle of the internal space of the blowing pipe 30. The blocking wall 35 extends from the inner space of the blowing pipe 30 to the lower base 20 and separates the inner space of the base 20 into the inflow passage 40a and the discharge passage 50a.

An air flow means 60 is provided in the inlet passage 40a and a part of the blocking wall 35 extending to the base 20 is pierced by the air flow means 60. This is so that the air flow between the inflow passage 40 and the discharge passage 50 is made only through the airflow means 60. The inlet of the air flow means 60 is connected in air flow with the inlet passages 40 and 40a and the outlet is connected with the outlet passages 50 and 50a in an air flow.

The air flow means 60 includes a blowing fan case 61, 61a, 61b, blowing fans 62, 62a, 62b provided inside the blowing fan case to form an air flow for generating a suction force, (63).

The motor 63 is preferably driven at a maximum rotational speed between 3,000 rpm and 12,000 rpm.

A plurality of blowing fans 62, 62a and 62b are connected to the motor 63 so that the blowing fans 62, 62a and 62b connected to the motor 63 are driven at a relatively low rotational speed, So that the noise is remarkably reduced as compared with the conventional air amplification type fan 1. The blowing fan cases 61, 61a and 61b move air along the outer circumferential surfaces of the blowing fans 62, 62a and 62b which flow in and flow through the inflow passage 40a and discharge them to the discharge passage 50a, F4b).

The introduction of the outside air into the inflow passages 40 and 40a through the inlet 45 is achieved by rotating the blowing fans 62, 62a and 62b by driving the motor 63. The inlet 45 is formed on the upper outer side of the blowing pipe 30 and is located at a relatively large distance from the base 20 connected to the lower area of the blowing pipe 30. [

The wall of the inner space of the base 20 is surrounded by a sound absorbing material (not shown) or formed of a material having a sound absorbing effect. Therefore, the noise generated by the rotating motor 63 and the blowing fans 62, 62a and 62b can be sufficiently reduced inside the base 20, and diffusion to the outside through the inlet 45 can be minimized.

The base 20 is also provided with a controller (not shown) for controlling the application of power and the operation of the motor 63.

The user can operate the controller to select or control the operation of the fan 10, the intensity of the airflow, and the like.

The discharge port 55 has a slot shape in which a part of the inner side making up the attracting mouth 80 is spaced apart and formed in an overlapping manner, and the inner side has a generally nose-like face. When the air in the discharge passage 50 is discharged to the discharge opening 55 by the rotational force of the blowing fan 62, 62a and 62b, the air flow moving along the inside face of the coil accelerates, The pressure is lowered and an attracting air flow is formed in which the outside air moves forward through the inlet port 80. [ Therefore, it is preferable that the air in the discharge passage 50 discharged from the discharge port 55 moves forward from the rear to increase the attracting air flow moving forward.

The spaced width of the discharge ports 55 is between 1 mm and 6 mm. And may include a plurality of spacers (not shown) between the intervals so as to keep the spacing of the discharge ports 55 uniform.

A filter 70 is provided in the inlet port 45 to filter foreign substances contained in the outside air. The filter 70 is not only detachable, but also can be reused after eliminating the foreign matter that is filtered, so that it is preferable that there is no burden of maintenance cost.

The use process of the fan 10 according to the present invention having such a configuration will be described with reference to FIG.

When the power is connected to the motor 63 and the blowing fans 62, 62a and 62b rotate, an air flow occurs. The external air flows into the inflow passage 40 through the inflow port 45 by the pressure difference created by the air flow F1. The foreign substances contained in the air are filtered while passing through the filter 70. The air that has passed through the inflow passage 40 moves to the inflow passage 40a formed in the base 20 and is sucked into the blower fan casings 61, 61a, 61b (F3, F3a, F3b) F4a and F4b along the outer circumferential surfaces of the rotating blowing fans 62 and 62a and 62b to be discharged into the discharge passage 50a formed inside the base 20. [ The air in the discharge passage 50a moves to the discharge passage 50 formed in the blowing pipe 30 and is discharged forward through the discharge opening 55 (F6). The air behind the blowing pipe 30 is attracted to the inlet port 80 and moved forward (F7) by the rapid air flow moving from the discharge port 55 to the inside surface. As a result, there is an effect that the airflow F6 discharged through the discharge port 55 and the airflow F7 attracted from the outside move in the forward direction, thereby amplifying the total blowing amount of the air-amplifying fan 10. [

Further, in the conventional air amplification type fan 1, a single blowing fan is connected to the motor so that the motor must rotate at a high speed in order to discharge a sufficient amount of air. In the present invention, however, , 62a and 62b are connected to each other to discharge the same air volume as that of the conventional fan at a lower rotational speed, resulting in low noise.

The scope of the present invention is not limited to the above-described embodiments, and various changes and modifications may be made by those skilled in the art. Accordingly, the invention is limited only by the following claims.

10: Fan 20: Base
30: blowing pipe 35: blocking wall
40, 40a: Inlet passage 42: Inlet cover
45: Inlet port 50, 50a: Discharge passage
55: discharge port 60: air flow means
61, 61a, 61b: blowing fan case 62, 62a, 62b: blowing fan
63: motor 70: filter
80: Incentives
F1: the flow of external air entering the inlet passageway (40) through the inlet (45).
F2: a flow in which the air in the inflow passage (40) formed in the air blowing pipe (30) moves to the inflow passage (40a) formed in the base (20).
F3: Flow in which the air in the inflow passage 40a is sucked into the air blowing fan case 61.
F3a: A flow in which the air in the inflow passage 40a is sucked into the blowing fan case 61a.
F3: Flow in which the air in the inflow passage 40a is sucked into the blowing fan case 61b.
F4: Flow of air that moves along the outer peripheral surface of the air blowing fan 62 and is discharged to the discharge passage 50a.
F4a: Flow of air that moves along the outer peripheral surface of the air blowing fan 62a and is discharged to the discharge passage 50a.
F4b: a flow of air that moves along the outer peripheral surface of the air blowing fan 62b and is discharged to the discharge passage 50b.
F5: Flow in which the air in the discharge passage (50a) formed in the base (20) moves to the discharge passage (50) formed in the blowing pipe (30).
F6: The flow of the air in the discharge passage (50) is discharged forward through the discharge port (55).
F7: A flow in which the air behind the blowing pipe (30) is attracted to the pulling-in port (80) by the flow of the air discharged from the discharge port (55) and moved forward.

Claims

As a fan for generating airflow,
Base;
An air flow means located in the base for generating an air flow;
A blowing pipe mounted on an upper region of the base and having an inlet port passing through the center of the tube so that outside air is drawn from the rear and discharged forward;
An inflow passage formed in the inner front side of the blowing pipe and through which the air introduced from the outside flows into the air flow means;
An inlet formed on an upper outer side surface of a blowing pipe for guiding outside air into the inflow passage;
A discharge passage through which air discharged from the air flow means flows into a space formed on the inner rear side of the blowing pipe;
A discharge port formed on the rear side of the blowing pipe toward the inlet port for discharging the air in the discharge passage to the outside;
And a blocking wall provided on the blowing pipe and the base so as to block the air flow between the inlet passage and the discharge passage.

The electric fan according to claim 1, characterized in that the air flow between the inlet passage and the discharge passage is made possible only by the air flow means passing through the blocking wall.

The electric fan according to claim 1, wherein the air in the discharge passage is discharged from the rear side to the discharge port forward.

The electric fan according to claim 1, wherein the blowing pipe is detachably connected to the base.

The electric fan according to claim 1, wherein an interval between openings of the discharge port is between 1 mm and 6 mm.

The electric fan according to claim 1, further comprising a filter installed at an inlet to filter foreign matter contained in the outside air.

The air conditioner according to claim 1, wherein the air flow means comprises: a blowing fan case; A blowing fan disposed in the blowing fan case; And a motor for driving the air blowing fan.

The electric fan of claim 7, wherein two or more blowing fans are connected to the motor.

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