KR20200127796A - Auto self fire damper for thermo-sensitivity and electrical operation - Google Patents

Abstract

The present invention relates to an auto-self fire damper electrically operated with thermal sensitivity, which comprises: a damper body installed in a duct; a plurality of ventilation opening and closing blades; a latch wheel connected and fixed to a rotary shaft of any one of the ventilation opening and closing blades; a blade closing spring; a ventilation opening operation wire for controlling a ventilation opening amount of the ventilation opening and closing blades; a latch wheel locking lever for fixing a rotation angle of the latch wheel; a locking lever spring for suppressing closing rotation of the latch wheel; and a shape memory alloy coil for closing the ventilation opening and closing blades in a damper ventilation passage. According to the present invention, reliability on an operation of the auto-self fire damper can be secured.

Description

Auto self fire damper for thermo-sensitivity and electrical operation

The present invention relates to a fire damper installed in an air conditioning or ventilation facility, and in particular, a first closing mode by an autonomous contraction reaction of a shape memory alloy coil, and a second closing by an arbitrary contraction reaction of the shape memory alloy coil according to external power input. It is possible to realize both the mode and the third closing mode by manual operation of the ventilation closing operation wire, and furthermore, operating mechanisms made by thermal sensitivity are installed outside the damper body to ensure the reliability of operation. It is electrically operated and can be used repeatedly even after one use, it is easy to check for operation failure, and power is automatically shut off at the same time as the damper is operated, so that the power loss for emergency use can be minimized.

In general, fire dampers are installed in ducts to block flames and smoke in case of fire. The fire damper detects a fire and closes the valve to block the propagation path of smoke and flame. In order to operate the fire damper, a fuse that melts when the temperature rises is sometimes used. In this case, once the fuse melts, it has a disadvantage that it cannot be used repeatedly. In addition, since the fuse uses the phenomenon of physical melting, it is difficult to safely inspect the fire damper. To solve this problem, the fuse is removed and a shape memory alloy coil is applied.

As a background technology of the present invention, as Korean Utility Model Registration No. 20-0441364, a'fire damper for a wet upright air duct with a guide control plate attached' has been proposed. This is to maintain the opening force through the fuse after forcibly opening the intermittent plate with a spring. However, this has a disadvantage that once the fuse melts down in the event of a fire, it cannot be used repeatedly, and it is difficult to confirm the operation check.

As another background technology of the present invention, as Korean Patent Registration No. 10-1559862, a'fire damper and a fire damper operating method' has been proposed. When the shape memory alloy coil is thermally sensitized, it contracts and overcomes the spring force to maintain the open and closes the duct passage. However, in the latter background technology, it is difficult to balance the force between the shape memory alloy coil and the elastic spring when the duct passage is opened.

Korean Utility Model Registration No. 20-0441364 Korean Patent Registration No. 10-1559862

The present invention relates to a first closing mode by an autonomous contraction reaction of a shape memory alloy coil, a second closing mode by an autonomous contraction reaction of a shape memory alloy coil according to an external power supply, and a third by manual manipulation of a ventilation closing wire. All closed modes can be realized, and moreover, operating mechanisms made by thermal sensitivity are installed outside the damper body to ensure the reliability of operation, thermally sensitive and electrically operated, and can be used repeatedly after use. Its purpose is to provide a fire damper that is easy to check for determining operation failure, and automatically shuts off power at the same time as the damper is operated to minimize emergency power loss.

According to a preferred embodiment of the present invention, in a fire damper installed in a duct for ventilation and cooling/heating of a building and used to block a propagation path of smoke and flame, a damper body having a damper ventilation passage and installed in the duct; ; A plurality of ventilation opening/closing blades rotatably installed on the damper body and hingedly connected to each other through a blade connection link to simultaneously open and close a ventilation passage; A latch wheel connected to and fixed to a rotating shaft of any one of the ventilation opening and closing blades; A blade closing spring for closing the ventilation opening and closing blade in a damper ventilation passage by applying an elastic rotational force to the latch wheel; A ventilation opening operation wire having one end connected to the latch wheel at a predetermined radial distance from the rotation center of the latch wheel to adjust the ventilation opening amount of the ventilation opening/closing blade by a pulling force; A latch wheel lock lever disposed close to the latch wheel to allow an open rotation of the latch wheel and suppress a closed rotation to fix a rotation angle of the latch wheel; A lock lever spring that rotates the latch wheel lock lever in one direction to engage the latch wheel to suppress the closing rotation of the latch wheel; One end is connected to the latch wheel locking lever and placed on the entrance side of the ventilation passage. In case of fire, it is sensitized to the temperature of the flame heat to overcome the force of the locking lever spring and loosen and rotate the latch wheel locking lever to ventilate the ventilation opening/closing blade. It characterized in that it includes; shape memory alloy coil to be closed in the passage.

In addition, the latch wheel, the blade closing spring, the ventilation opening operation wire and the latch wheel locking lever are disposed outside the damper body.

In addition, a cross-sectional shape of the damper ventilation passage is characterized in that it forms a square or circular shape.

In addition, it is characterized in that it further comprises a ventilation closing operation wire for manually unlocking and rotating the latch wheel lock lever by one end connected to the latch wheel lock lever side.

In addition, a ventilation closing operation wire that manually unlocks and rotates the latch wheel locking lever is installed, but the ventilation closing operation wire is installed at the free end of the ventilation closing operation wire spring installed at a position where the latch wheel locking lever can be released and rotated. It is characterized by being connected.

In addition, the automatic self-fire damper further includes a fire damper circuit to reduce the power load of the closing operation of the ventilation opening and closing blade when a fire occurs, and to check the operation of the ventilation opening and closing blade when necessary, and the fire damper circuit A bridge rectifier outputting a voltage of the same polarity even when a voltage of the polarity is input; A micro switch connected to the output terminal of the bridge rectifier to be turned on when the circular ventilation opening and closing blade is opened, and operating off after the closing operation of the circular ventilation opening and closing blade; A DC step-down converter connected to the micro switch to lower and convert a DC voltage; A control unit connected to the DC step-down converter to perform functions of voltage detection, temperature detection, voice signal generation, and output voltage control; A voice signal amplifier for amplifying the voice signal generated by the control unit; A speaker for sounding the final signal output from the audio signal amplifier; A power electronic switch connected to the output terminal of the micro switch and configured to control power applied to the shape memory alloy coil with a pulse by a control signal from the controller; A DC output terminal connected to the power electronic switch to supply a DC voltage to the shape memory alloy coil; A check input terminal connected to the DC step-down converter and connected to a DC +12V, ground, and initialization terminal; And a temperature detector connected to the control unit to detect and detect the indoor temperature to which the auto self fire damper is connected.

In addition, when a fire occurs, the control unit checks the operation sequence, detects the ambient temperature through a temperature detector, and obtains an output value, modulates the pulse width through the control operation of the power electronic switch, and supplies direct current to the shape memory alloy coil to close it. When it is confirmed that the circular ventilation opening/closing blade is closed, the indicator lights up with voice guidance, and if it is confirmed that the opening is repeated for a certain period of time through the micro switch, the fault indicator lights up as a fault output signal. do.

In addition, after applying external power to the inspection input terminal for operation check, if the operation check key is closed and the button is confirmed, the ambient temperature is sensed through a temperature detector to obtain an output value, and pulse through the control operation of the power electronic switch. By modulating the width, direct current is supplied to the shape memory alloy coil to induce closing, and when the closing of the circular ventilation opening and closing blade is confirmed, the indicator lights up with a voice guidance, and if the opening is repeated several times for a certain period of time through the micro switch When this is confirmed, the fault indicator is lit.

In addition, when the ventilation open operation wire handle connected to the ventilation open operation wire is rotated by more than 90 degrees, the latch wheel lock lever release pin vertically mounted on the latch wheel pushes the fixing arm provided on the latch wheel lock lever side to latch it. It is characterized in that the closing of the ventilation opening and closing blade is induced by rotating the wheel locking lever.

According to the thermally sensitive and electrically operated auto-self fire damper of the present invention, operating mechanisms that are subsequently operated by the thermal sensitivity of the shape memory alloy coil are installed outside the damper body to ensure reliability of operation.

In addition, by rapidly unlocking the latch wheel lock lever by the thermal response of the shape memory alloy coil, the ventilation opening and closing blade is automatically closed, so that the propagation path of smoke and flame can be quickly blocked. In addition, since the shape memory alloy coil is connected through an electric circuit, sequential control is possible, and operation checks can be easily performed electrically if necessary.

In addition, since the shape memory alloy coil can be reused even after one fire, the fire damper can be repeatedly used without replacement.

In addition, it is possible to differentiate start numbers for multiple fire dampers in a building, thereby reducing the peak power load to increase the reliability of operation, and to expect sensitive fire protection by pulse management control by temperature sensing. have.

In addition, the operation of the fire damper and the switching-off operation at the same time cut off the driving power to prevent malfunction, and it is possible to minimize the use of emergency common power.

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It is limited and should not be interpreted.
1 is a perspective view of a fire damper according to the present embodiment.
Figure 2 is a front view of Figure 1;
Figure 3 is a side view of Figure 1;
Figure 4a is a plan view of Figure 2 shown in a state in which the blade for opening and closing ventilation is opened at 90 degrees.
Figure 4b is a plan view of Figure 2 shown in a closed state for the ventilation opening and closing blade.
Figure 5a is a cross-sectional view taken along line AA of Figure 2 shown in a state in which the blade for opening and closing ventilation is opened at 90 degrees.
Figure 5b is a cross-sectional view taken along the line AA of Figure 2 shown in a closed state for the ventilation opening and closing blade.
6 is a diagram illustrating a connection state between a shape memory alloy coil and a latch wheel locking lever.
7 is a configuration diagram of an operation handle for operating a ventilation opening operation wire and a ventilation closing operation wire applied to the present invention.
8 is a circuit diagram of a fire damper applied to the present embodiment.
9 is a control flow chart of the fire damper according to the present embodiment during fire and operation check.
10A is a state in which the latch wheel lock lever release pin and the fixing arm are additionally installed according to the present invention.
Figure 10b is a view of the unlocking operation of the latch wheel lock lever when the ventilation open operation wire handle is operated at 90 degrees or more in order to induce ventilation closing.
Figure 10c is a configuration diagram of a ventilation opening operation handle applied to the present invention.

In the following, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the disclosed embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The fire damper 10 according to the present invention is installed in the duct 5 as shown in FIG. 5A for ventilation and cooling/heating of the building and is used to block the propagation path of smoke and flame. In particular, the fire damper 10 is operated in a heat sensitive manner in case of a fire, and at the same time, it is possible to minimize power loss for emergency use by automatically shutting off power. In addition, when multiple fire dampers are installed, they are sequentially operated to prevent sudden current load from occurring. In addition, the fire damper 10 supplies external power to facilitate electrical operation check.

The fire damper 10 according to the present embodiment is provided with a damper body 12 installed in the duct 5 as shown in FIGS. 1 to 6. The damper body 12 has a damper ventilation passage 121 therethrough. The damper body 12 may be configured by combining upper and lower panels 12a and 12b and left and right panels 12c and 12d manufactured by bending a plate material in this embodiment. Therefore, smoke and flame propagating from the duct 5 can be blocked by closing the damper ventilation passage 121. The cross-sectional shape of the damper ventilation passage 121 is formed in a square shape in the present embodiment, but may be formed in a circular shape.

A plurality of blades 14 for opening/closing ventilation are installed in the damper body 12 for opening and closing the damper ventilation passage 121. The plurality of blades 14 for opening and closing ventilation is disposed in the damper ventilation passage 121 and is rotatably installed in the damper body 12. The plurality of ventilation opening and closing blades 14 are hingedly connected to the plurality of ventilation opening and closing blades 14 at the same time through a blade connection link 15 in order to rotate and interlock. At this time, each of the blades 14 for opening and closing ventilation is hinged to the blade connection link 15 through the blade arm 144. The ventilation opening and closing blade 14 has a blade rotation shaft 141 and is rotatably installed on the damper body 12. The ventilation opening and closing blade 14 may be configured by bending a plate material to manufacture a blade, and then bolting the blade rotation shaft 141 to both ends. Therefore, when the ventilation opening and closing blade 14 is closed as shown in FIG. 5B, the adjacent ventilation opening and closing blades 14 and 14 contact each other to block the damper ventilation passage 121. In this embodiment, the ventilation opening and closing blade 14 has arcuate curved surfaces at both ends, but is not limited to this shape and may be in contact with each other without a curved surface.

A latch wheel 16 is connected and fixed to any one rotation shaft 141 of the plurality of blades 14 for opening and closing ventilation. Accordingly, the latch wheel 16 rotates integrally with the plurality of blades 14 for opening and closing ventilation. The latch wheel 16 is preferably selected to be located in the center when an odd number of blades 14 for opening and closing ventilation are installed. The latch wheel 16 has a latch groove 161 formed over a certain section of the outer circumferential surface. The latch groove 161 is formed to be engaged with the latch wheel locking lever 22 when fixing the opening amount of the ventilation opening/closing blade 14 to suppress the rotational closing operation of the latch wheel 16.

A blade closing spring 18 is connected to the latch wheel 16. The blade closing spring 18 has one end connected to the latch wheel 16 and the other end connected to the damper body 12 side to exert an elastic repulsive force. In FIG. 4A, the blade closing spring 18 exerts an elastic repulsive force to rotate the latch wheel 16 clockwise. Accordingly, the blade closing spring 18 is installed to the latch wheel 16 with a force that causes the ventilation opening and closing blade 14 to be closed and rotated by a torsional elastic force. At this time, in order to adjust the closing force (torsion force) of the blade closing spring 18, a plurality of screw holes in which a bolt (not shown) that fixes one end of the blade closing spring 18 to the latch wheel 16 is screwed. 162 can be formed.

A wire 20 for operating ventilation opening is connected to the latch wheel 16. The ventilation opening operation wire 20 adjusts the ventilation opening amount of the ventilation opening/closing blade 14 by a pulling force. The ventilation opening operation wire 20 has one end connected to a certain radial distance from the rotation center of the latch wheel 16 and the other end is located indoors as shown in FIG. Connected to 210. At this time, a wire guide 166 may be further installed so that the ventilation opening operation wire 20 is wound on the outer circumferential surface of the latch wheel 16 and is not separated when released. Accordingly, the user can adjust the ventilation opening amount of the ventilation opening and closing blade 14 through the ventilation opening operation wire 20. At this time, it is preferable that the opening angle is marked around the wire handle 210 for ventilation opening operation on the ventilation control panel 200.

A latch wheel locking lever 22 for fixing the rotation angle of the latch wheel 16 is provided. The latch wheel locking lever 22 is disposed close to the latch wheel 16 and is rotatably coupled to the damper body 12 through a hinge 21. The latch wheel locking lever 22 has a locking projection 221 at one end. When the ventilation opening/closing blade 14 is open as shown in FIG. 5A, the locking projection 221 is caught in the latch groove 161 of the latch wheel 16 to suppress the closing rotation of the latch wheel 16. Therefore, when the latch wheel 16 is rotated by a certain amount to open the ventilation opening/closing blade 14, the locking protrusion 221 is caught in the latch groove 161 and the ventilation opening and closing unless the latch wheel locking lever 22 is unlocked. The dragon blade 14 opens the damper ventilation passage 121 by the opening amount while maintaining the opening amount. In addition, when the latch wheel locking lever 22 is rotated to release, the latching protrusion 221 is separated from the latch groove 161 of the latch wheel 16, so the latch wheel 16 by the blade closing spring 18 is It rotates closed as shown in Figure 5b together with the blade 14 for opening and closing ventilation.

A lock lever spring (24) is connected to the latch wheel lock lever (22). The lock lever spring 24 has one end connected to the latch wheel lock lever 22 and the other end connected to the damper body 12 side. Therefore, the lock lever spring 24 rotates the latch wheel lock lever 22 in one direction to be caught by the latch wheel 16 to suppress the closing rotation of the latch wheel 16. In this embodiment, the lock lever spring 24 rotates the latch wheel lock lever 22 in the counterclockwise direction around the hinge 21 in FIG. 4A.

Here, the latch wheel 16, the blade closing spring 18, the ventilation opening operation wire 20, and the latch wheel locking lever 22 are disposed outside the damper body 12 so that they are not exposed to flame heat in case of fire. Does not.

A shape memory alloy coil 26 is installed on the damper body 12. The shape memory alloy coil 26 has one end connected to the latch wheel locking lever 22 through a wire 29 for connecting the shape memory alloy coil and is disposed on the inlet side of the ventilation passage 121. The shape memory alloy coil 26 may be connected to, for example, the shape memory alloy coil support bracket 27 installed at the top of the inlet side of the ventilation passage 121 on the damper body 12 side. The shape memory alloy coil 26 operates in response to the temperature of flame heat during a fire. The shape memory alloy coil 26 is in an elongated state when it is not in contact with flame heat. However, when the shape memory alloy coil 26 is exposed to the heat of the flame, it contracts to overcome the force of the lock lever spring 24 and releases the latch wheel lock lever 22 to rotate the blade 14 for opening/closing ventilation as shown in FIG. 5B. It is closed in the damper ventilation passage (121). In addition, the shape memory alloy coil 26 may be electrically operated. This will be described later.

In order to manually induce the closing of the ventilation opening and closing blade 14, a ventilation closing operation wire 28 may be further installed. The ventilation closing operation wire 28 is connected to the free end of the ventilation closing operation wire spring 25 installed at a position where one end thereof is capable of loosening and rotating the latch wheel locking lever 22 as shown in FIG. 4A. The other end may be connected with the ventilation opening operation wire 20 to the ventilation operation plate 200 side ventilation closed operation wire handle 220 which is located on the indoor side. Therefore, when the ventilation closed operation wire 28 connected to the ventilation closed operation wire spring 25 as shown in FIG. 4A is pulled by the ventilation closed operation wire handle 220, the ventilation closed operation wire spring 25 is constant. At the moment when the rotation amount is greater than or equal to the rotation amount, the latch wheel lock lever 22 is rotated to release the latch wheel 16 so that the ventilation opening/closing blade 14 is closed as shown in FIG. 5B.

As another embodiment, the ventilation closing operation wire 28 may have one end directly connected to the latch wheel locking lever 22 side. In this case as well, when the ventilation closing operation wire handle 220 is rotated, the latch wheel locking lever 22 is released through the ventilation closing operation wire 28 to close the ventilation opening and closing blade 14.

Here, the shape memory alloy coil connection wire 29 may be removed, and the shape memory alloy coil 26 may be connected to the ventilation-closing wire 28 to operate.

In addition, a wire guide pipe 40 for guiding the ventilation opening operation wire 20 and the ventilation closing operation wire 28 may be further installed on the upper portion of the damper body 12.

Unexplained code '32' is'wire support roller'

The fire damper 10 configured as described above can operate closed in three modes when the ventilation opening and closing blade 14 is open. The first mode is a method of closing the shape memory alloy coil 26 by a contraction action due to the heat sensitivity of itself, and the second mode is a method of closing operation by inputting external power to the shape memory alloy coil 26. The 3 mode is a method of operating the closing operation by manually operating the ventilation closing operation wire 28.

First, when the ventilation opening operation wire 20 is pulled in FIG. 4A, the latch wheel 16 rotates counterclockwise, and the ventilation opening/closing blade 14 directly connected to the latch wheel 16 is a blade connection link 15 ), the damper ventilation passage 121 is opened as shown in FIG. 5A by simultaneously rotating in the same direction with the other blades 14 for opening and closing ventilation.

At this time, the opening amount of the damper ventilation passage 121 increases together with the rotation amount of the latch wheel 16 according to the pulling amount of the ventilation opening operation wire 20.

When the pulling force of the ventilation opening operation wire 20 is removed in a state in which the damper ventilation passage 121 is opened to the maximum, that is, 90 degrees open, the latch wheel 16 by the blade closing spring 18 is It tries to rotate clockwise, but is stopped by the latch wheel lock lever 22. That is, the latching protrusion 221 of the latch wheel locking lever 22 is caught in the latch groove 161 so that the latch wheel 16 cannot be rotated to its original position, so that the ventilation opening/closing blade 14 remains open. Therefore, at this time, ventilation is performed through the damper ventilation passage 121 of the fire damper 10.

In such a state, when a fire occurs in the place where the fire damper 10 is installed and the fire heat passes through the damper ventilation passage 121 in the damper body 12, the shape memory alloy coil 26 is self-heating and shrinks abruptly. do. As a result, the latch wheel lock lever 22 is pulled and rotated via the wire 29, and the latch wheel 16 is released from the latch wheel lock lever 22, so that the latch wheel 16 is released from the spring for closing the blade. With the spring force of 18), the damper ventilation passage 121 is closed by being rotated together with the ventilation opening and closing blade 14 to the original position (clockwise). In this way, in the event of a fire, the blade 14 for opening and closing the ventilation is quickly closed due to the sudden contraction of the shape memory alloy coil 26, and the damper ventilation passage 121 is closed, thereby performing a fire prevention function that quickly blocks the propagation path of smoke and flame. Is done. That is, the first mode method of closing operation by the contraction action caused by the thermal sensitivity of the shape memory alloy coil 26 itself is performed.

The fire damper 10 operated in this way is not used for a single use, but once it is operated, if the ventilation opening operation wire 20 is pulled as shown in FIG. 4B, the blade 14 for opening and closing ventilation is opened again. In addition, since the shape memory alloy coil 26 is restored to its original state, a heat-sensitive operation is performed in case of a fire again, so that repeated use is possible.

Meanwhile, the fire damper 10 may further include a fire damper circuit 50 as shown in FIG. 8 so as to be electrically operated during a safety inspection as well as in a fire. The fire damper circuit 50 is configured to reduce the power load of the valve closing operation when a fire occurs, and to easily check the valve operation when necessary.

As shown in Figure 8, the fire damper circuit 50 is connected to a bridge rectifier 502 that outputs a voltage of the same polarity no matter what polarity voltage is input, and a latch when the circular valve 14 is opened by being connected to the output terminal of the bridge rectifier 502. A micro switch 504 mounted on the printed circuit board 500 of FIG. 3 and a micro switch so that the stopper 210 is touched to operate ON and OFF after the circular valve 14 is closed. A DC step-down converter 506 connected to 504 to reduce and convert the voltage of direct current (DC) and a DC step-down converter 506 to perform the functions of voltage detection, temperature detection, voice signal generation, and output voltage control. A control unit 508 that amplifies the voice signal generated by the control unit 508, a speaker 512 that sounds the final signal output from the voice signal amplifier 510 as a voice, and a micro switch A power electronic switch 514 that is connected to the output terminal of the 504 to control power as a pulse by a control signal of the control unit 508, and a DC voltage that is connected to the power electronic switch 514 to convert a DC voltage into a shape memory alloy coil. A DC output terminal 516 supplied to 26, a check input terminal 518 connected to the DC step-down converter 506 and connected to a DC +12V, ground, and initialization terminal, and a control unit 508 It includes a temperature detector 520 for detecting and detecting the ambient temperature of the room to which the fire damper is connected.

The operation of the fire damper circuit 50 during an emergency (fire occurrence) will be described with reference to the flowchart of FIG. 9.

First, when emergency power is applied (S10) by detecting a fire from the fire monitoring panel (not shown), the control unit 508 checks the operation sequence (S11), and then detects the ambient temperature through the temperature detector 520 (S12). ) To calculate the output value corresponding to the sensed temperature (S13). Here, the peak power load can be leveled according to the order of operation, thereby reducing rapid power consumption, thereby increasing the reliability of operation.

Then, the pulse width is modulated (S14) through the control operation of the power electronic switch 514 to supply direct current to the shape memory alloy coil 26 to close the ventilation opening/closing blade 14. At this time, when direct current is supplied to the shape memory alloy coil 26, it contracts due to heat generation, thereby inducing the closing of the ventilation opening and closing blade 14. That is, a second mode of closing operation by inputting external power to the shape memory alloy coil 26 is performed.

Here, when the closing of the ventilation opening and closing blade 14 is confirmed (S15), the micro switch 504 is turned off to automatically cut off the input power (S16). At this time, the voice guidance of the closed state of the ventilation opening and closing blade 14 and the closing indicator light are lit.

This can prevent the malfunction of the fire damper 10, it can be expected to minimize the use of emergency power.

On the other hand, when it is confirmed that the opening (S17) is repeated several times through the micro switch 504 (S19), a fault output signal is output (S20). For example, an alarm sound is sounded on the speaker 512 by the fault output signal or the fault indicator is lit.

On the other hand, it goes without saying that it is possible to check the operation through the same process by supplying external power to the inspection input terminal 518 of FIG. 8 (S5). In this process, if the operation check key is not confirmed (S30) of the closing button, the damper status is checked (S31) and if it is closed, the guidance of the closing voice and the lighting of the closing indicator (S32) are made, and when opening is achieved, it is opened. The voice guidance and the indicator light are turned on (S33).

On the other hand, the fire damper 10 can be operated to close by manually operating the ventilation closing operation wire 28, which is a third mode method, when the ventilation opening and closing blade 14 is open. When the ventilation closing operation wire 28 connected to the ventilation closing operation wire spring 25 is pulled as shown in FIG. 4A, the latch wheel locking lever at the moment when the ventilation closing operation wire spring 25 becomes more than a certain amount of rotation ( 22) is rotated to release the latch wheel 16 so that the blade 14 for opening and closing ventilation is closed as shown in FIG. 5B.

In this way, the fire damper 10 may ensure the reliability of operation by installing operating mechanisms made by thermal sensitivity to the outside of the damper body 12.

In addition, by using the shape memory alloy coil 26, it is possible to automatically block the propagation path of smoke and flame by thermal sensitivity, and it is possible to control sequentially electrically and to easily conduct an operation check if necessary. have.

In addition, since the shape memory alloy coil 26 can be reused even after one fire, the fire damper 10 can be repeatedly used without replacement.

In addition, it is possible to increase the reliability of operation by reducing the peak power load by giving different start numbers to multiple fire dampers 10 in a building, and to expect a sensitive fire protection operation by pulse management control by temperature sensing. .

In addition, it is possible to prevent malfunction by blocking the driving power at the same time as the fire damper 10 operates, and to minimize the use of emergency common power.

On the other hand, the present invention can induce closing of the ventilation opening and closing blade 14 by removing the ventilation closing operation wire 28 and using the ventilation opening operation wire 20. This is ventilated by a latch wheel lock lever release pin 165 vertically mounted on the latch wheel 16 and a fixing arm 225 provided on the latch wheel lock lever 22 side as shown in FIGS. 10A to 10C. It is possible to close the open ventilation opening and closing blade 14 with only the operation wire 20.

That is, when the wire handle 210 for ventilation opening operation is rotated more than 90 degrees, the latch wheel lock lever release pin 165 vertically mounted on the latch wheel 16 is fixed provided on the latch wheel lock lever 22 side. By pushing the arm 225 as shown in FIG. 10B and rotating the latch wheel lock lever 22, the latch wheel 16 is released, and the closing of the blade 14 for opening/closing ventilation is induced. As a result, the ventilation opening operation wire handle 210 is rotated in the closing direction of 90 degrees or more in FIG. 10C and then released, thereby closing the ventilation opening and closing blade 14 by rotating the latch wheel 16 in the closing direction. At this time, by delaying the return of the latch wheel lock lever 22 to its original position, rotation of the latch wheel 16 in the closing direction can be maintained. This may be implemented by installing a viscous hinge, for example, on the rotation shaft of the latch wheel locking lever 22.,

Until now, the present invention has been described in detail with reference to the presented embodiments, but those of ordinary skill in the art can make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such modifications and variations of the invention, but is limited by the claims appended below.

12: damper body
14: blade for opening and closing ventilation
16: latch wheel
18: blade closing spring
20: ventilation opening operation wire
22: latch wheel lock lever
24: lock lever spring
26: shape memory alloy coil
28: Ventilation closing operation wire

Claims (9)

In the fire damper 10 installed in the duct 5 for ventilation and cooling and heating of the building and used to block the propagation path of smoke and flame,
A damper body 12 that has a damper ventilation passage 121 and is installed in the duct 5;
A plurality of ventilation opening/closing blades (14) rotatably installed on the damper body (12) and hingedly connected via a mutual blade connection link (15) to simultaneously open and close the ventilation passage (121);
A latch wheel 16 connected to and fixed to any one of the blades 14 for ventilation opening and closing;
A blade closing spring 18 for closing the ventilation opening and closing blade 14 in a damper ventilation passage 121 by applying an elastic rotational force to the latch wheel 16;
A ventilation opening operation wire 20 that has one end connected to the latch wheel 16 at a certain radial distance from the rotation center of the latch wheel 16 to adjust the ventilation opening amount of the ventilation opening and closing blade 14 by a pulling force Wow;
A latch wheel lock lever (22) disposed close to the latch wheel (16) to allow an open rotation of the latch wheel (16) and inhibit a closed rotation to fix the rotation angle of the latch wheel (16);
A lock lever spring (24) which rotates the latch wheel lock lever (22) in one direction so as to be caught by the latch wheel (16) to suppress the closing rotation of the latch wheel (16);
One end is connected to the latch wheel locking lever 22 side and disposed on the inlet side of the ventilation passage 121, and is sensitized to the temperature of the flame heat in case of fire to overcome the force of the locking lever spring 24 and the latch wheel locking lever 22 A shape memory alloy coil 26 that closes the ventilation opening and closing blade 14 in the damper ventilation passage 121 by unwinding rotation; heat-sensitive and electrically operated automatic self-fire damper, comprising: The method of claim 1,
The latch wheel (16), the blade closing spring (18), the ventilation opening operation wire (20), and the latch wheel locking lever (22) are disposed outside the damper body (12). Auto self fire damper operated by The method of claim 1,
The auto-self fire damper operated electrically with thermal sensitivity, characterized in that the cross-sectional shape of the damper ventilation passage 121 is square or circular. The method of claim 1,
Heat-sensitive and electrically operated auto, characterized in that it further includes a ventilation-closing operation wire 28 that has one end connected to the latch wheel locking lever 22 side to manually unlock and rotate the latch wheel locking lever 22 Self fire damper. The method of claim 1,
Ventilation closing operation wire (28) for manually unlocking and rotating the latch wheel locking lever (22) is installed, but the ventilation closing operation wire (28) is installed in a position where the latch wheel locking lever (22) can be released and rotated. An automatic self-fire damper operated electrically with thermal sensitivity, characterized in that it is connected to the free end of the wire spring 25 for closing ventilation. The method of claim 1,
The automatic self-fire damper further includes a fire damper circuit 50 to reduce the power load of the closing operation of the ventilation opening and closing blade 14 when a fire occurs and to check the operation of the ventilation opening and closing blade 14 when necessary,
In the fire damper circuit 50,
A bridge rectifier 502 that outputs a voltage of the same polarity even if a voltage of any polarity is input;
A micro-switch 504 connected to the output terminal of the bridge rectifier 502 to be turned on when the circular ventilation opening and closing blade 14 is opened, and operating off after the circular ventilation opening and closing blade 14 is closed;
A direct current step-down converter 506 connected to the micro switch 504 to convert a voltage of direct current (DC) to be lowered;
A control unit 508 connected to the DC step-down converter 506 to perform functions of voltage detection, temperature detection, voice signal generation, and output voltage control;
A voice signal amplifier 510 for amplifying the voice signal generated by the control unit 508;
A speaker 512 for sounding the final signal output from the audio signal amplifier 510 as a voice;
A power electronic switch 514 connected to the output terminal of the micro switch 504 and configured to control power applied to the shape memory alloy coil 26 with a pulse by a control signal from the control unit 508;
A DC output terminal 516 connected to the power electronic switch 514 to supply a DC voltage to the shape memory alloy coil 26;
A check input terminal 518 connected to the DC step-down converter 506 and connected to a DC +12V, ground, and initialization terminal;
A temperature detector 520 that is connected to the control unit 508 and detects and detects the indoor temperature to which the auto self fire damper is connected; and an auto self fire damper operated electrically with thermal sensitivity. The method of claim 6,
In the event of a fire, the control unit 508 checks the operation sequence, detects the ambient temperature through the temperature detector 520 and obtains an output value,
The pulse width is modulated through the control operation of the power electronic switch 514 to supply direct current to the shape memory alloy coil 26 to induce closing,
When it is confirmed that the circular ventilation opening/closing blade 14 is closed, the indicator lights up with voice guidance, and if it is confirmed that the opening is repeated several times for a certain period of time through the micro switch 504, the fault indicator lights up as a fault output signal. Automatic self-fire damper operated electrically with thermal sensitivity, characterized in that. The method of claim 6,
After applying external power to the inspection input terminal 518 for operation check, when the operation check key is confirmed to be closed,
By sensing the ambient temperature through the temperature detector 520 to obtain an output value,
The pulse width is modulated through the control operation of the power electronic switch 514 to supply direct current to the shape memory alloy coil 26 to induce closing,
When it is confirmed that the circular ventilation opening/closing blade 14 is closed, the indicator lights up with voice guidance, and if it is confirmed that the opening is repeated for a certain period of time through the micro switch 504, the failure indicator lights up. Automatic self-fire damper operated electrically and thermally sensitive. The method of claim 1,
When the ventilation opening operation wire handle 210 connected to the ventilation opening operation wire 20 is rotated more than 90 degrees, the latch wheel lock lever release pin 165 vertically mounted on the latch wheel 16 becomes the latch wheel lock lever. Heat-sensitive and electrically operated autoself, characterized in that the closing of the ventilation opening and closing blade 14 is induced by pushing the fixing arm 225 provided on the side of (22) and rotating the latch wheel locking lever 22 Fire damper.

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