WO2004065858A1

WO2004065858A1 - Ventilation system

Info

Publication number: WO2004065858A1
Application number: PCT/KR2004/000114
Authority: WO
Inventors: Gi Su Kim
Original assignee: Tadong Polytech Co., Ltd
Priority date: 2003-01-23
Filing date: 2004-01-20
Publication date: 2004-08-05

Abstract

A ventilation system includes a grill installed on a portion of a place to be ventilated; an exhaust pipe having one end coupled to the grill; an exhaust fan having one end coupled to the other end of the flexible exhaust pipe and generating an inhaling force; and a damper having one end coupled to the exhaust fan and the other end coupled to a main exhaust pipe, wherein air of the place is exhausted by the inhaling force from the grill to the main exhaust pipe.

Description

VENTILATION SYSTEM

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a ventilation system for exhausting a polluted air to ventilate, for example, a toilet or a bathroom and, more particularly, to a ventilation system which inhales a polluted air by using an electric motor and then exhausts it through a main exhaust pipe.

2. Description of the Related Art

FIG. 1 is a view illustrating a conventional ventilation system. Referring to FIG. 1 , the conventional ventilation system includes an exhaust fan 2, a flexible hose 12, a fire damper 40, and a direction changing portion 60, and a connection band (not shown). The exhaust fan 2 includes a protective grill 4 and an electric motor 8 having vanes 6 which are integrated with each other. The exhaust fan 2 generates an inhaling force to inhale and exhaust a polluted air. The exhaust fan 2 is installed on a ceiling 200. The flexible hose 12 has one end coupled to the exhaust fan 2 through the direction changing portion 60 and the other end coupled to the fire damper 40. The fire damper 40 is coupled to a main exhaust pipe 80. The direction changing portion 60 serves to prevent the flexible horse 12 from being bent and a backwind from inflowing from an external portion. The connection band is used to band joint portions between the components. However, the conventional exhaust fan 2 of FIG. 2 has a disadvantage in that it causes much noise. Such a noise results from an air friction sound during a rotation of the vanes 6, aging of the electric motor 8, or a vibration between the exhaust fan 2 and the ceiling 200. Therefore, as an electric motor having a high RPM or a high capacity is used to increase exhaustion flow rate, the noise is increased as much. That is, the conventional ventilation system has a limitation to increasing exhaustion flow rate. Also, when the electric motor 8 is out of order, the whole exhaust fan 2 including the electric motor 8 has to be replaced, leading to a high maintenance fee. Further, as shown in FIG. 1 , there is a problem in that a height of more than 300 mm is spatially required to install the ventilation system. The exhaust fan 2 basically spatially occupies a height of 100mm to 150mm, and the air current directional changing portion 60 spatially occupies a height of more than 150mm. Furthermore, an electric wire is coupled to the electric motor 8 after the ceiling 200 is constructed. Therefore, the electric motor 8 is difficult to be wired due to a narrow space between the exhaust fan 2 and the ceiling 200. In particular, the electric wire is exposed on the ceiling 200 "as is", leading to a risk of electric accidents such as an electric shock.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a ventilation system which is low in noise, low in maintenance fee, easy to install, and safe.

In order to achieve the above object, the present invention provides a ventilation system, comprising: a grill installed on a portion of a place to be

ventilated; an exhaust pipe having one end coupled to the grill; an exhaust fan having one end coupled to the other end of the flexible exhaust pipe and

generating an inhaling force; and a damper having one end coupled to the

exhaust fan and the other end coupled to a main exhaust pipe, wherein air of

the place is exhausted by the inhaling force from the grill to the main exhaust

pipe.

The grill has a pipe portion integrated therewith. A direction changing

portion is integrated with the grill instead of the pipe portion. The direction

changing portion has a bent portion which is bent at an angle of 90 degree. The

direction changing portion has a backwind preventing shutter to prevent a

backwind from inflowing from a main exhaust pipe 80 during a non-driving of the

ventilation system.

The exhaust pipe is a flexible horse made of aluminum. The exhaust pipe is a flexible duct which comprises a cylindrical air pipe having

compressibility, tensibility, and flexibility by forming a synthetic fiber on both

outside and inside thereof along a coil type of bone line; a sound absorbing member made of copolymer wrapping an outside of the cylindrical air pipe; and

an outside finishing material located outside the sound absorbing member. The damper is an inflow shielding damper which perform a close

operation at a predetermined temperature to prevent a toxic gas from inflowing when a fire breaks out, or an insect preventing damper which has a net to prevent insects from coming in through the exhaust pipe from the main exhaust pipe. The exhaust fan includes a frame portion and an electric motor, the frame portion having a cylindrical tube type and a fixing portion that the electric motor is inserted into and fixed to.

The components are detachably coupled to each other.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

FIG. 1 is a view illustrating a conventional ventilation system;

FIG. 2 is a view illustrating a conventional exhaust fan;

FIG. 3 is an exploded view illustrating a ventilation system according to the present invention; and FIG. 4 is a cross-sectional view illustrating a state that the ventilation system of FIG. 3 is installed.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the thickness of layers and regions are exaggerated for clarity. Like numbers refer to like elements throughout the specification.

FIG. 3 is an exploded view illustrating a ventilation system according to the present invention, and FIG. 4 is a cross-sectional view illustrating a state that the ventilation system of FIG. 3 is installed. Referring to FIGs. 3 and 4, the exhaust fan includes a grill 10, an exhaust pipe 20, an exhaust fan 30, and a damper 40.

The grill 10 serves as an air inlet through which an air flows in and is installed on a ceiling or a wall of a place to be ventilated. One side of the grill 10 is installed on the ceiling 200, and the other side has a pipe portion which is to be coupled to the exhaust pipe 20. Preferably, a length of the pipe of the grill 10 is in a range between 30mm and 50mm. The pipe portion helps the grill 10 easy to be coupled to the exhaust pipe 20. Preferably, a direction changing portion 60 is integrated with the grill 10 instead of the pipe portion. The direction changing portion 60 has a bent portion which is bent at an angle of 90 degree. The direction changing portion 60 has a backwind preventing shutter 62 to prevent a backwind from inflowing from a main exhaust pipe 80 during a non-driving of the ventilation system. The backwind preventing shutter 60 has two types: gravity type; and wind power type. Of these, FIG. 4 shows a gravity type of the backwind preventing shutter.

The exhaust pipe 20 serves to form an air path from the grill 10 to the main exhaust pipe 80 so that an air inflowed from the grill 10 can be exhausted through the main exhaust pipe 80. Preferably, a flexible horse made of aluminum is used as the exhaust pipe 20. Also, as the exhaust pipe 20 a flexible duct can be used. The flexible duct includes a cylindrical air pipe, a sound absorbing member, and an outside finishing material. The cylindrical air pipe has compressibility, tensibility, and flexibility by forming a synthetic fiber having a predetermined width on outside and inside thereof along a coil type of bone line. The sound absorbing member is made of copolymer and wraps an outside of the cylindrical air pipe by a predetermined thickness to reduce a noise and a vibration which are generated in the cylindrical air pipe. The outside finishing material is located outside the sound absorbing member to prevent an air from outflowing and to protect the cylindrical air pipe and the sound absorbing member.

The exhaust fan 30 includes a frame portion 310 and an electric motor 320. The frame portion 310 is of a cylindrical tube type and has a fixing portion 330 that the electric motor 320 is inserted into and fixed to. A punctured portion 340 is also formed in the frame portion 310. Through the punctured portion 340, an electric power wire 350 is connected to the electric motor 320. The punctured portion 340 is made of an elastic material such as a rubber. After the electric power wire 350 is inserted into the punctured portion 340 to be coupled to the electric motor 320, a remaining space of the punctured portion 340 is plugged by a packing. The exhaust fan 30 generates an inhaling force to exhaust a polluted air along an air path from the grill 10 to the main exhaust pipe 80.

One side of the exhaust fan 30 is coupled to the exhaust pipe 20, and the other side is coupled to the main exhaust pipe 80 or the damper 40. The exhaust fan 30 is installed such that it is inserted into the main exhaust pipe 80 or the damper 40 in the form of like a socket. Such a coupling can be reinforced by another coupling means.

The damper 40 is coupled to the main exhaust pipe 80 to form an air path through which an air inflowed is exhausted to the main exhaust pipe 80. As the damper 40, an inflow shielding damper or an insect preventing damper is used. The inflow shielding damper is one which perform a close operation at a predetermined temperature to prevent a toxic gas from inflowing when a fire breaks out, and the insect preventing damper is one which has a net to prevent insects from coming in through the exhaust pipe 20 from the main exhaust pipe 80. FIG. 3 shows the inflow shielding damper.

The grill 10, the exhaust pipe 20, the exhaust fan 30, and the damper 40 are respectively independent members and so detachable from each other. Joint portions between the components described above are coupled to each other by a coupling means such as a connection band (not shown).

The exhaust fan 30 and the damper 40 can be coupled to the main exhaust pipe 80 in advance before a ceiling is constructed, and a wiring can be done before a ceiling construction as well. Therefore, it is safe from a risk of electric accidents. Also, when a flexible horse or a flexible duct is used as the exhaust pipe

20, when a space (about 200mm from a ceiling or a wall) required to bend them is secured, the ventilation system of the present invention is easy to install. Further, the components are detachable, and thus maintenance fee is low.

Furthermore, since the exhaust fan is coupled to the damper other than the grill and the flexible duct is excellent in absorbing a sound, a noise is significantly reduced.

Claims

WHAT IS CLAIMED IS:

1. A ventilation system, comprising: a grill installed on a portion of a place to be ventilated; an exhaust pipe having one end coupled to the grill; an exhaust fan having one end coupled to the other end of the flexible exhaust pipe and generating an inhaling force; and a damper having one end coupled to the exhaust fan and the other end coupled to a main exhaust pipe, wherein air of the place is exhausted by the inhaling force from the grill to the main exhaust pipe.

2. The system of claim 1 , wherein the grill has a pipe portion integrated therewith.

3. The system of claim 1 , wherein the grill has a direction changing portion integrated therewith, the direction changing portion having a bent portion which is bent at an angle of 90 degree.

4. The system of claim 1, wherein the direction changing portion has a backwind preventing shutter to prevent a backwind from inflowing from a main exhaust pipe during a non-driving of the ventilation system.

5. The system of claim 1 , wherein the exhaust pipe is a flexible horse made of aluminum.

6. The system of claim 1 , wherein the exhaust pipe is a flexible duct which comprises a cylindrical air pipe having compressibility, tensibility, and flexibility by forming a synthetic fiber on both outside and inside thereof along a coil type of bone line; a sound absorbing member made of copolymer wrapping an outside of the cylindrical air pipe; and an outside finishing material located outside the sound absorbing member.

7. The system of claim 1, wherein the damper is an inflow shielding damper which perform a close operation at a predetermined temperature to prevent a toxic gas from inflowing when a fire breaks out, or an insect preventing damper which has a net to prevent insects from coming in through the exhaust pipe from the main exhaust pipe.

8. The system of claim 1 , wherein the exhaust fan includes a frame portion and an electric motor, the frame portion having a cylindrical tube type and a fixing portion that the electric motor is inserted into and fixed to.

9. The system of claim 1 , wherein the components are detachably coupled to each other.