WO2006088286A1

WO2006088286A1 - Control device for exhaust regulating damper in dry air duct for apartment building

Info

Publication number: WO2006088286A1
Application number: PCT/KR2005/004531
Authority: WO
Inventors: Myung-Soo Nam
Original assignee: Cheiltech Co., Ltd.
Priority date: 2005-02-17
Filing date: 2005-12-26
Publication date: 2006-08-24
Also published as: KR100518762B1

Abstract

Disclosed herein is a control device for an exhaust regulating damper in a dry air duct for an apartment building. The control device includes a damper shaft (11) passing through the center in the exhaust duct, a disc-shaped exhaust regulating damper (10), a rubber blade (12) mounted to an edge of the exhaust regulating damper, a rectangular base (20), a support sheet (30), a coupling (40) having a semi-circular through hole (41) and a pressing part (42), first and second limit switches (50, 51), a reduction gearbox (53), a converter (60), a storage battery (61), a mounting board (62), and an excessive temperature prevention part (70).

Description

Description CONTROL DEVICE FOR EXHAUST REGULATING DAMPER

IN DRY AIR DUCT FOR APARTMENT BUILDING

Technical Field

[1] The present invention relates, in general, to a control device for an exhaust regulating damper in a dry air duct for an apartment building and, more particularly, to a control device for an exhaust regulating damper, in which the exhaust regulating damper is installed in an exhaust duct connected to a vertical duct such that an opening angle of the exhaust regulating damper is differentially adjusted according to the story of the apartment building, thus allowing polluted air to be discharged smoothly according to the story, and a rubber blade is mounted to an edge of the exhaust regulating damper to increase closing efficiency, thus preventing the backflow of exhaust gas. The exhaust regulating damper serves as a fireproof damper which is automatically closed and returned to its original state regardless of a power failure when a fire breaks out. Further, a base and a support sheet are integrated with the exhaust duct, thus increasing productivity.

Background Art

[2] Generally, offensive odors or polluted air are produced in a specific area of a residence, mainly a kitchen or a bathroom. In order to afford a pleasant residential environment, offensive odors or polluted air must be rapidly discharged to the outside of the building. To this end, as shown in FIG. 1, an air collecting hood and a ventilating fan 7 communicating with a vertical duct 3 are mounted above a gas range 6 in the kitchen. Further, a vent 8 is usually provided on the ceiling or sidewall of the bathroom to communicate with the vertical duct 3.

[3] In an apartment building, exemplified by row houses, an air duct comprises a vertical duct 3, which is vertically set up so as to discharge polluted air produced by each unit. The lower end of the vertical duct 3 is sealed by a cleaning part 9. The vertical duct 3 defines an air passage that permits the natural discharge of air by an exhaust fan 2, which is a non-powered ventilator installed at the uppermost story (on the roof).

[4] However, the conventional air duct for the kitchen or bathroom is problematic in that it adopts a natural discharge method using the exhaust fan 2 provided on the roof and the rising action of hot air, so that offensive odors or polluted air may not be smoothly discharged, and in addition, may flow back into the kitchen or bathroom when wind does not blow, so the exhaust fan 2 is not rotated, or low pressure develops, so a descending air current is increased. [5] In order to solve the problem, many efforts have made. For example, the non- powered exhaust fan 2 is replaced with a power-driven fan. Further, a power-driven fan is mounted on the lower end of the vertical duct 3 so as to enhance discharging efficiency.

[6] In spite of such efforts, the apartment building having a plurality of stories is problematic in that air flowing in the vertical duct 3 is more rapidly discharged at an upper story, and air flowing in the vertical duct 3 is more slowly discharged at a lower story, so that the exhaust efficiency of the lower story is lower than that of the upper story, when an exhaust operation is conducted using the same-sized exhaust duct 4 and exhaust regulating damper for the same period of time. Disclosure of Invention

Technical Problem

[7] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a control device for an exhaust regulating damper, in which the exhaust regulating damper is installed in an exhaust duct connected to a vertical duct such that an opening angle of the exhaust regulating damper is differentially adjusted according to the story of the apartment building, thus allowing polluted air to be discharged smoothly according to the story, and a rubber blade is mounted to an edge of the exhaust regulating damper to increase closing efficiency, thus preventing the backflow of exhaust gas. The exhaust regulating damper serves as a fireproof damper which is automatically closed and returned to its original state regardless of a power failure when a fire breaks out. Further, a base and a support sheet are integrated with the exhaust duct, thus increasing productivity.

Technical Solution

[8] In order to accomplish the object, the present invention provides a control device for an exhaust regulating damper in a dry air duct for an apartment building, constructed so that an exhaust duct of each unit is connected through a distribution pipe to a vertical duct having at an upper position thereof an exhaust fan, and indoor air of each unit is discharged through the exhaust duct to the vertical duct, the control device including a damper shaft vertically passing through a center in the exhaust duct, a first end of the damper shaft being rotatably secured to an inner circumference of the exhaust duct, and a second end of the damper shaft passing through the exhaust duct and protruding from the exhaust duct, thus forming a semi-circular first fastening member; a disc-shaped exhaust regulating damper rotating about the damper shaft, thus opening or closing the exhaust duct; a rubber blade mounted along an edge of the exhaust regulating damper, and having a hook-shaped cross-section; a rectangular base having a predetermined size, and secured to an outer circumference of the exhaust duct in such a way as to be perpendicular to the damper shaft, with a circular through hole being formed in a predetermined portion of the base such that the first fastening part of the damper shaft passes through the circular through hole; a support sheet mounted to a surface of the base, with a peripheral wall having a predetermined height being provided around an edge of the support sheet; a cylindrical coupling including a semicircular through hole formed longitudinally through a center of the coupling so that the first fastening part passing through the base and the support sheet is inserted into the semi-circular through hole, and a pressing part having a shape of a rectangular prism and extending from the coupling in such a way as to be perpendicular to the semicircular through hole; first and second limit switches arranged to be at a predetermined angle to each other and limiting rotation of the coupling; a reduction gearbox inserted at a first end thereof into the semicircular through hole of the coupling, and coupled at a second end thereof to a motor provided in a direction perpendicular to the coupling, the reduction gearbox reducing a rotating speed of the motor using a worm gear and a plurality of pinion gears; a converter to convert an applied alternating power source to a direct power source having predetermined voltage and current; a storage battery accumulating a predetermined capacity of the direct power source converted by the converter, and applying the power source to the motor; a mounting board to seal the coupling and the first and second limit switches in cooperation with the support sheet, the reduction gearbox, the converter, and the storage battery being mounted on the mounting board; and an excessive temperature prevention part mounted on the mounting board to automatically control the supply of power to the converter, according to the temperature detected by a heat detecting sensor installed in the exhaust duct.

[9] The control device further includes an angle adjusting means, having the first limit switch secured to the mounting board, a circular guide rotatably provided on a hole which is formed in the support sheet so that the first fastening part passes through the hole, a lever extending from the circular guide in such a way as to pass through the support sheet, with a handle being provided to be perpendicular to the lever, and the second limit switch secured to a support plate, which is angularly spaced apart from the lever at a predetermined angle, whereby the angle adjusting means adjusts an angle between the second limit switch and the first limit switch using the lever, as desired.

[10] Further, the base and the support sheet are integrated with the exhaust duct, thus enhancing productivity.

Advantageous Effects

[11] The present invention constructed and operated as described above has the following effects. [12] The present invention provides a control device for an exhaust regulating damper, in which the exhaust regulating damper is installed in an exhaust duct connected to a vertical duct such that an opening angle of the exhaust regulating damper is differentially adjusted according to the story of the apartment building, thus allowing polluted air to be discharged smoothly according to the story, and a rubber blade is mounted to an edge of the exhaust regulating damper to increase closing efficiency, thus preventing the backflow of exhaust gas. The exhaust regulating damper serves as a fireproof damper which is automatically closed and returned to its original state regardless of a power failure when a fire breaks out. Further, a base and a support sheet are integrated with the exhaust duct, thus increasing productivity. Therefore, the present invention is very useful.

Description of Drawings

[13] FIG. 1 is a schematic view of a dry air duct for an apartment building, adapted to the present invention;

[14] FIG. 2 is a perspective view showing the operation of an exhaust regulating damper and a coupling, when the exhaust regulating damper of the present invention is closed;

[15] FIG. 3 is a perspective view showing the operation of the exhaust regulating damper and the coupling, when the exhaust regulating damper of the present invention is opened;

[16] FIG. 4 is a side sectional view showing internal construction, when the exhaust regulating damper of the present invention is closed;

[17] FIG. 5 is a front view showing a control unit, according to the present invention;

[18] FIG. 6 is a sectional view taken along line A-A of FIG. 4a;

[19] FIG. 7 is a side sectional view showing internal construction, when the exhaust regulating damper of the present invention is opened;

[20] FIG. 8 is a front view showing the control unit, according to this invention;

[21] FIG. 9 is a sectional view taken along line B-B of FIG. 5a;

[22] FIG. 10 is a detailed view showing an angle adjusting means that adjusts the angle of the exhaust regulating damper of this invention; and

[23] FIG. 11 is an exploded perspective view of the present invention.

Mode for Invention

[24] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[25] FIG. 1 is a schematic view of a dry air duct for an apartment building, adapted to the present invention, FIG. 2 is a perspective view showing the operation of an exhaust regulating damper and a coupling, when the exhaust regulating damper of the present invention is closed, FIG. 3 is a perspective view showing the operation of the exhaust regulating damper and the coupling, when the exhaust regulating damper of the present invention is opened, FlG. 4 is a side sectional view showing internal construction, when the exhaust regulating damper of the present invention is closed, FlG. 7 is a side sectional view showing internal construction, when the exhaust regulating damper of the present invention is opened, and FlG. 10 is a detailed view showing an angle adjusting means that adjusts the angle of the exhaust regulating damper of this invention.

[26] According to the present invention, a control device 1 for an exhaust regulating damper includes an exhaust regulating damper 10, a damper shaft 11, a rubber blade 12, a base 20, a support sheet 30, a coupling 40, first and second limit switches 50 and 51, a reduction gearbox 53, a converter 60, a storage battery 61, a mounting board 62, an excessive temperature prevention part 70, and an angle adjusting means 80.

[27] The damper shaft 11 vertically passes through the central portion in the exhaust duct 4. One end of the damper shaft 11 is rotatably secured to the inner circumference of the exhaust duct 4, and the other end of the damper shaft 11 passes through the exhaust duct 4 to protrude therefrom. A first fastening part 111 having a semi-circular shape is provided on a protruding part of the damper shaft 11.

[28] The exhaust regulating damper 10 has the shape of a disc which is equal to the inner diameter of the exhaust duct 4, and rotates about the damper shaft 11, thus opening or closing the exhaust duct 4.

[29] The rubber blade 12 is mounted around the edge of the exhaust regulating damper

10 and have the cross-section of a hook shape, thus more efficiently preventing the back flow of exhaust gas. Preferably, the hook part of the rubber blade 12 is inclined inwards at about 17 degrees.

[30] The base 20 has the shape of a rectangle having a predetermined size. A circular through hole 21 is formed in the base 20 such that the first fastening part 111 of the damper shaft 11 passes through the hole. The base 20 is installed on the outer circumference of the exhaust duct 4 in such a way as to be perpendicular to the damper shaft 11.

[31] The support sheet 30 is mounted to a surface of the base 20. A peripheral wall having a predetermined height is provided around the edge of the support sheet 30.

[32] More preferably, the base 20 and the support sheet 30 are integrated with the exhaust duct 4 into a single structure so as to increase productivity.

[33] A through hole 41 having a semi-circular shape is longitudinally formed through the center of the cylindrical coupling 40 so that the first fastening part 111 passing through the base 20 and the support sheet 30 is coupled to the coupling 40. A pressing part 42 having the shape of a rectangular prism extends from the coupling 40 in such a way as to be perpendicular to the semi-circular through hole 41. [34] The first and second limit switches 50 and 51 are arranged to be at a predetermined angle to each other, and limit the rotation of the coupling 40.

[35] One end of the reduction gearbox 53 is inserted into the semi-circular through hole

41 of the coupling 40, and the other end of the reduction gearbox 53 is coupled to a motor 52, which is provided in a direction perpendicular to the coupling 40. Thereby, the reduction gearbox 53 reduces the rotating speed of the motor 52 using a worm gear 531 and a plurality of pinion gears 532.

[36] The converter 60 comprises a conventional converter that coverts an applied alternating power source to a direct power source having a predetermined voltage and current.

[37] When power is supplied to the control device of this invention, the storage battery

61 accumulates a predetermined capacity of direct power source, which is converted by the converter 60, and thereafter, starts to apply power to the motor 52.

[38] The mounting board 62 seals the coupling 40 and the first and second limit switches 50 and 51 in cooperation with the support sheet 30. The reduction gearbox 53, the converter 60, and the storage battery 61 are seated on the mounting board 62.

[39] The excessive temperature prevention part 70 is mounted on the mounting board 62 to automatically turn on or off electricity supplied to the converter 60, according to the temperature detected by a heat detecting sensor 71, which is installed in the exhaust duct 4.

[40] The angle adjusting means 80 includes the first limit switch 50 secured to the mounting board 62. A circular guide 81 is rotatably fitted over the hole formed in the support sheet 30 so that the first fastening part 111 passes through the hole. A lever 82 extends from the circular guide 81 and passes through the support sheet 30, with a handle 83 provided on the lever 82 to be perpendicular to the lever 82. The second limit switch 51 is secured to a support plate 84, which is angularly spaced apart from the lever 82 at a predetermined angle. Thus, it is possible to adjust an angle between the first and second limit switches 50 and 51 as desired, using the lever 82.

[41] Hereinafter, the preferred embodiment of the present invention will be described in detail.

[42] The conventional dry air duct for an apartment building is constructed and operated as follows. That is, the exhaust duct 4 of each unit is connected via a distribution pipe 5 to the vertical duct 3 having at an upper position thereof the exhaust fan 2. Thereby, polluted indoor air from each unit is discharged through the exhaust duct 4 to the vertical duct 3. The control device 1 for the exhaust regulating damper allowing easy angle adjustment, according to the present invention, is installed in the exhaust duct 4 of such a conventional dry air duct and operated as follows.

[43] First, when a power switch (not shown) is turned on and a commercial alternating power source of 110V to 220V is applied, the converter 60 converts the power source into a direct power source of 12V, and the power source is supplied to the storage battery 61. The supplied power source charges the storage battery 61 such that it has a preset current, and thereafter, drives the motor 52.

[44] Next, the rotating speed of the motor 52 is reduced to 1/500 by the reduction gearbox 53, having the worm gear 531 coupled to an end of the drive motor 52 and the pinion gears 532 engaging with the worm gear 531, so that the motor 52 has 12 RPM.

[45] Subsequently, the reduced rotating force rotates the coupling 40, coupled to an end of the reduction gearbox 53, so that the pressing part 42 of the coupling 40 starts to rotate counterclockwise from the direction of 9 o'clock. Simultaneously, the damper shaft 11 and the exhaust regulating damper 10 coupled to one end of the coupling 40 start to rotate, so that the interior of the exhaust duct 4 is opened.

[46] Afterwards, when the rotating pressing part 42 of the coupling 40 reaches the direction of 6 o'clock, the second limit switch 51 is pressed and the motor 52 is stopped. Simultaneously, the interior of the exhaust duct 4 is completely opened.

[47] Next, when a time set by a timer 54 has passed or the power switch is manually turned off, the applied power is cut off and the motor 52 is automatically rotated backwards by a predetermined magnitude of current which is accumulated in the storage battery 61. Thereby, the pressing part 42 of the coupling 40 starts to rotate clockwise from the direction of 6 o'clock. Simultaneously, the exhaust regulating damper 10 installed in the exhaust duct 4 starts to close the exhaust duct 4.

[48] Thereafter, when the pressing part 42 of the coupling 40 reaches the direction of 9 o'clock, the first limit switch 50 is pressed and the motor 52 is stopped. Simultaneously, the interior of the exhaust duct 4 is completely closed, and thus the initial state is restored.

[49] Further, the lever 82 of the angle adjusting means 80 to which the second limit switch 51 is secured is rotated using the handle 83, so that the angle between the first and second limit switches 50 and 51 is adjusted, and thus the angle of the exhaust regulating damper 10 is adjusted.

[50] The exhaust efficiency of the apartment building having a plurality of stories varies according to each story. That is, the exhaust regulating damper 10 is designed such that its opening ratio is large in the lower story, and is small in the upper story, thus increasing exhaust efficiency.

[51] Further, when the heat detecting sensor 71 installed in the exhaust duct 4 detects that exhaust temperature exceeds a prescribed temperature, that is, 72 °C to 102 °C , the excessive temperature prevention part 70 automatically cuts off power supplied to the converter 60. The exhaust regulating damper 10 is automatically returned to a closed state by electricity accumulated in the storage battery 61, even if electricity is cut off. Preferably, a return fuse (not shown) is used to automatically supply electricity when all conditions normalize and normal exhaust temperature is detected by the heat detecting sensor 71.

[52] Preferably, the automatic return function of the exhaust regulating damper 10 is conducted in the same manner, even in the event of a power failure.

[53] Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Industrial Applicability

[54] The present invention constructed and operated as described above has the following effects.

[55] The present invention provides a control device for an exhaust regulating damper, in which the exhaust regulating damper is installed in an exhaust duct connected to a vertical duct such that an opening angle of the exhaust regulating damper is differentially adjusted according to the story of the apartment building, thus allowing polluted air to be discharged smoothly according to the story, and a rubber blade is mounted to an edge of the exhaust regulating damper to increase closing efficiency, thus preventing the backflow of exhaust gas. The exhaust regulating damper serves as a fireproof damper which is automatically closed and returned to its original state regardless of a power failure when a fire breaks out. Further, a base and a support sheet are integrated with the exhaust duct, thus increasing productivity. Therefore, the present invention is very useful.

Claims

[1] A control device for an exhaust regulating damper in a dry air duct for an apartment building, constructed so that an exhaust duct of each unit is connected through a distribution pipe to a vertical duct having at an upper position thereof an exhaust fan, and indoor air of each unit is discharged through the exhaust duct to the vertical duct, the control device comprising: a damper shaft vertically passing through a center in the exhaust duct, a first end of the damper shaft being rotatably secured to an inner circumference of the exhaust duct, and a second end of the damper shaft passing through the exhaust duct and protruding from the exhaust duct, thus forming a semi-circular first fastening member; a disc-shaped exhaust regulating damper rotating about the damper shaft, thus opening or closing the exhaust duct; a rubber blade mounted along an edge of the exhaust regulating damper, and having a hook-shaped cross-section; a rectangular base having a predetermined size, and secured to an outer circumference of the exhaust duct in such a way as to be perpendicular to the damper shaft, with a circular through hole being formed in a predetermined portion of the base such that the first fastening part of the damper shaft passes through the circular through hole; a support sheet mounted to a surface of the base, with a peripheral wall having a predetermined height being provided around an edge of the support sheet; a cylindrical coupling, comprising: a semi-circular through hole formed longitudinally through a center of the coupling so that the first fastening part passing through the base and the support sheet is inserted into the semi-circular through hole; and a pressing part having a shape of a rectangular prism, and extending from the coupling in such a way as to be perpendicular to the semicircular through hole; first and second limit switches arranged to be at a predetermined angle to each other, and limiting rotation of the coupling; a reduction gearbox inserted at a first end thereof into the semicircular through hole of the coupling, and coupled at a second end thereof to a motor provided in a direction perpendicular to the coupling, the reduction gearbox reducing a rotating speed of the motor using a worm gear and a plurality of pinion gears; a converter to convert an applied alternating power source to a direct power source having predetermined voltage and current; a storage battery accumulating a predetermined capacity of the direct power source converted by the converter, and applying the power source to the motor; a mounting board to seal the coupling and the first and second limit switches in cooperation with the support sheet, the reduction gearbox, the converter, and the storage battery being mounted on the mounting board; and an excessive temperature prevention part mounted on the mounting board to automatically control the supply of power to the converter, according to the temperature detected by a heat detecting sensor installed in the exhaust duct.

[2] The control device according to claim 1, further comprising angle adjusting means, comprising: the first limit switch secured to the mounting board; a circular guide rotatably provided on a hole which is formed in the support sheet so that the first fastening part passes through the hole; a lever extending from the circular guide in such a way as to pass through the support sheet, with a handle being provided to be perpendicular to the lever; and the second limit switch secured to a support plate, which is angularly spaced apart from the lever at a predetermined angle, whereby the angle adjusting means adjusts an angle between the second limit switch and the first limit switch using the lever, as desired.

[3] The control device according to claim 1, wherein the base and the support sheet are integrated with the exhaust duct.