JP2006187524A - Damper opening and closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper opening/closing device capable of opening a damper in an energized state, rapidly responding when an electric current is interrupted, controlling the operation of a damper opening/closing mechanism so as to close the damper, and restoring a damper opening state to a non-energized state. <P>SOLUTION: The opening/closing device 1 includes a solenoid 5 for operating the damper opening/closing mechanism part by driving a plunger; and an opening/closing circuit part 11 for electrically controlling the solenoid 5. When the current is interrupted, electric charges stored in capacitors 16a, 16b when the current is supplied are supplied to the solenoid 5. The operation of the damper opening/closing mechanism part is controlled by driving the plunger so as to rapidly close the damper. Consequently, a fire prevention damper is surely closed even in power interruption, etc. Since the charging of the capacitors 16a, 16b is terminated in a short period of time, the initial opening state of the damper is restored as necessary even to the non-energized state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damper opening / closing device, and more particularly, to a damper opening / closing device capable of controlling the opening / closing of a damper to close a duct in the event of a fire to prevent transmission of flame and diffusion of smoke.

  Conventionally, ducts having various purposes such as ventilation, air conditioning, and exhaust have been arranged in buildings. In the middle of these ducts, a damper for adjusting the amount of gas flow is provided, and a damper opening / closing device for controlling the opening / closing of the damper is installed. For example, ventilation ducts for the purpose of removing moisture from baths and toilets, air conditioning ducts that circulate warm or cold air in office buildings, etc., thermal power plants, petrochemical plants, waste incinerators, etc. Dampers installed in exhaust ducts for the purpose of discharging gas and carbon dioxide, etc., have damper opening and closing devices that control the angle and opening and closing of the damper to adjust the amount of gas flow, or block the gas flow It has been installed. In addition, when a fire breaks out, a fire damper that prevents flames and smoke from spreading to another room through the duct has a damper opening and closing that closes the damper by the action of a thermal fuse and elastic body, or by electrical control. The apparatus is used in the form of having the purpose of adjusting the gas flow rate as described above or for the sole purpose.

  Here, in the case of a damper opening and closing device that electrically controls the opening and closing of these dampers, a method of operating the damper opening and closing mechanism by energization when closing the damper in the open state is common. For example, in a fire-proof damper that complies with the Building Standards Act, the damper is kept open in a normal state without being energized, and the damper is opened and closed by operating the operator to energize when a fire occurs. A damper opening and closing device for closing is used.

  However, when a power failure occurs during a fire or an electric wire in a building is damaged, power is not supplied, so the damper opening / closing mechanism cannot be operated and the damper cannot be closed. Therefore, as a damper opening and closing device that does not require power when closed, the capacitor accumulates charge when energized and the damper is opened by the electric motor, and the damper is used when the accumulated charge is used and the current is cut off. A damper opening and closing device is disclosed. Specifically, in a mode in which the opening and closing of the ventilation fan and the opening and closing of the damper are linked, when the power is turned on to use the ventilation fan, the time when the damper starts to open is delayed by a predetermined time by using a relay operation delay circuit. In the meantime, charge is accumulated in the capacitor. When the use of the ventilation fan is stopped, or when the current is cut off due to a power failure due to the occurrence of a fire, the charge accumulated in the capacitor is discharged and supplied to the DC motor, and the DC motor is rotated in the reverse direction and the damper Is closed (see, for example, Patent Document 1). There is also a fire damper opening / closing device in which the opening / closing mechanism of the damper in the open state is locked by an electromagnetic chuck, and when the current is interrupted, the electromagnetic locking is released and the damper is closed. .

Japanese Patent Publication No. 63-6025

  However, since the damper opening / closing device that operates the damper opening / closing mechanism by the electric motor described above is a mode interlocked with the ventilation fan, the damper is opened by energizing only when the ventilation fan is used, but various devices are always energized. In the case of a ship that is generally used in a normal state, the damper opening / closing device is of a type in which the fire damper is opened in the normal state and the damper is closed when the current is interrupted. It is also desirable from the viewpoint of safety because the damper is securely closed even in the event of a power outage due to a fire. In this respect, the above-described fire damper opening / closing device that locks the damper open state by the electromagnetic chuck maintains the damper open in the energized state and closes when the current is cut off, but the damper is closed. In order to return to the open state after being applied, it was necessary to energize the electromagnetic chuck again. Therefore, when the non-energized state continues, there is a problem that the damper cannot be returned to the open state until electricity is restored. Further, there is a problem that the apparatus itself becomes large by using the electromagnetic chuck.

  Further, in the damper opening and closing device that interlocks the opening and closing of the ventilation fan and the damper, since one of the problems to be solved is to quietly close the damper, the damper opening and closing mechanism is operated by reverse rotation of the motor. However, in the damper opening and closing device for fire prevention, in order to prevent damage, a response that is quickly closed rather than quiet is required. Therefore, in order to control the operation of the damper opening / closing mechanism, a means that responds faster than an electric motor has been desired.

  Therefore, in view of the above circumstances, the present invention controls the operation of the damper opening / closing mechanism to quickly close the damper when the current is interrupted, and easily sets the damper to the initial open state even in the non-energized state. It is an object of the present invention to provide a damper opening and closing device that can be restored to the above.

  In order to solve the above problems, a damper opening / closing device according to the present invention has a "a plunger having one end connected to a damper opening / closing mechanism part, and the damper opening / closing mechanism part is electrically connected according to driving of the plunger. A controllable solenoid, an external power source, the solenoid, and a power storage means capable of storing charge for driving the plunger, respectively, and a charge circuit and the power storage means for storing the charge in the power storage means An open / close circuit portion in which a discharge circuit for discharging the electric charge accumulated in the switch is formed, and a relay that switches to either the charge circuit or the discharge circuit according to a connection state of the open / close circuit portion and the external power source. The relay is switched to the charging circuit when the open / close circuit unit and the external power source are in an electrically connected state, and the power storage means The charge is stored, and when the open / close circuit unit and the external power supply are electrically disconnected, the discharge circuit discharges the charge stored in the power storage means and supplies the charge to the solenoid. The plunger is driven, and the damper opening / closing mechanism is interlocked with the plunger to change the damper from the open state to the closed state ”.

  Here, the solenoid drives a plunger (movable iron core) by magnetic energy generated by current flowing through an electromagnetic coil, and mechanically controls an external mechanism using the linear motion of the plunger. The driving of the plunger in this solenoid has an advantage that the operation is stable because of excellent response and simple structure. Therefore, it is suitable for a fire damper open / close device that is required to operate promptly and reliably when a disaster occurs. In addition, even if a small solenoid is used, a relatively large thrust can be obtained with a short stroke.

  The power storage means may be a known technique such as a capacitor or a micro battery. Depending on the size of the damper and the structure of the damper opening / closing mechanism, the type and size of the solenoid must be selected in consideration of the force required to close the damper, and the charge that can operate the solenoid is stored. A storage means having a capacity capable of being used is used.

  Further, as the relay, a mechanical relay that mechanically opens and closes a contact using an electromagnet, a solid state relay using a semiconductor, or the like can be used.

  Therefore, according to the damper opening / closing device of the present invention, for example, in the energized state in which the DC-type external power supply and the open / close circuit unit are electrically connected, the charging circuit in which current flows from the external power supply to the storage means becomes a closed circuit, and the solenoid The electric charge for driving the plunger is accumulated in the power storage means. At this time, since the current also flows through the relay, the discharge circuit is not closed by the operation of the relay, and the inflow of current from the external power source to the solenoid is cut off. Therefore, the solenoid plunger is not driven. And in normal times, this energized state is continued.

  After that, when the current from the external power source is cut off due to manual power cut or a power failure at the time of fire, damage to the electric wire, etc., the current to the relay is also cut off, and the discharge circuit becomes a closed circuit by the operation of the relay. As a result, the charge accumulated in the power storage means is released and supplied to the solenoid. As a result, a current flows through the electromagnetic coil of the solenoid, magnetic flux is generated, and the plunger is driven. Here, since one end of the plunger is connected to the damper opening / closing mechanism, the operation of the damper opening / closing mechanism is controlled in conjunction with the operation of the plunger. That is, when the current is interrupted, the charge accumulated when the power storage means is energized is released, and the solenoid receives the supply of the charge to drive the plunger, thereby controlling the operation of the damper opening / closing mechanism, and the damper Closed. Therefore, it becomes possible to prevent the flame and smoke from diffusing through the duct when a fire occurs. In addition, since the discharge of the electric charge from the power storage means is completed in a short time and the plunger returns to the state before the operation, the damper opening / closing mechanism can be operated in the direction to open the damper even in the non-energized state.

  Furthermore, the damper opening / closing device according to the present invention may be provided with “the switching circuit unit includes a rectifying circuit that rectifies an alternating current and turns it into a direct current” in addition to the above-described configuration.

  Here, a half-wave rectifier circuit, a double-wave rectifier circuit, a bridge rectifier circuit, or the like can be used as the rectifier circuit, and is selected in consideration of the voltage of the external power supply to be used and the reverse withstand voltage of the diode to be used. . Further, it is desirable to smooth using a capacitor.

  Therefore, according to the damper opening and closing device of the present invention, by forming a rectifying circuit in the opening and closing circuit unit, an AC external power supply can be used, and electric charge is accumulated in the storage means by the rectified direct current, When the electric charge is supplied to the solenoid, the damper opening / closing mechanism is controlled to open / close the damper. When a DC power supply is used, the DC current passes through the rectifier circuit as it is and flows into the charging circuit. That is, both a DC power supply and an AC power supply can be used.

  Furthermore, the damper opening and closing device according to the present invention may be one that “a plurality of the power storage means are used and arranged in an electrically parallel state with each other” in addition to the above configuration.

  Here, in the case where there is one power storage means, if the power storage means is damaged, sufficient charge is not supplied to operate the solenoid. In contrast, if a plurality of power storage means are connected in parallel, even if any power storage means is damaged in the event of an emergency such as a fire, the solenoid plunger is driven by the charge accumulated in the remaining power storage means. Thus, the damper opening / closing mechanism can be controlled.

  In addition, the damper whose opening and closing is controlled by the damper opening and closing device varies depending on the size and shape of the duct to be installed, and the damper blades are not limited to a pair, and are configured in several stages using several pairs of blades. Has also been used. In that case, a plurality of blades are interlocked by a connecting tool, and the opening and closing of several pairs of blades is controlled by one damper opening and closing device. Therefore, depending on the structure of the damper, the mechanical energy required to operate the damper opening / closing mechanism is large, and the solenoid that converts the electrical energy into the mechanical energy driven by the plunger and controls the operation of the damper opening / closing mechanism is also provided. Requires large electrical energy. As a result, power storage means for supplying electric charge to the solenoid also needs to have a large capacity for storing power. At this time, when a capacitor is used as the power storage means, if a large capacity is to be covered by one capacitor, the size of the capacitor to be used increases, and accordingly, the damper opening / closing device itself also increases in size. On the other hand, if a plurality of capacitors are used and the total of the respective capacities is used, it is sufficient that each capacitor is small, and the damper opening / closing device can be prevented from becoming large.

  Therefore, according to the damper opening and closing device of the present invention, a plurality of power storage means are connected in parallel, so that even if any power storage means is damaged during a fire or the like, the remaining power storage means charges the solenoid. Is supplied and the plunger is driven, and the damper opening / closing mechanism is reliably controlled to close the damper. In addition, since the total capacity of charges that can be stored by a plurality of power storage means is increased and more electric energy is supplied to the solenoid to drive the plunger, the mechanical energy required for the damper opening / closing mechanism to close the damper is reduced. It is possible to cope with larger cases.

  As an effect of the present invention, in a damper opening / closing device that accumulates electric charge in a power storage means in an energized state and operates the damper opening / closing mechanism when a current is interrupted using the accumulated electric charge, By controlling the operation using a solenoid plunger, the damper is quickly closed by the quick response of the plunger. Further, even in a non-energized state, the damper can be returned to the open state again.

  A damper opening / closing device 1 (hereinafter referred to as “opening / closing device 1”) according to an embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a circuit diagram showing a configuration of the switchgear 1 in an energized state, FIG. 2 is a circuit diagram showing a configuration of the switchgear 1 in a non-energized state, and FIG. FIG. 4 is an explanatory diagram illustrating a schematic configuration of the damper switch 2, and FIG. 4 is an explanatory diagram illustrating a use state of the switchgear 1. Here, the switchgear 1 of this embodiment is illustrated about what is mainly used for the damper switch 2 for fire prevention installed in a ship.

  As shown in FIGS. 1 to 3, the opening / closing device 1 of the present embodiment includes a solenoid 5 having a plunger 4 having one end connected to the damper opening / closing mechanism 3, and the plunger 4 by electrically controlling the solenoid 5. Is mainly provided with an opening / closing circuit unit 11 for controlling the operation of the damper opening / closing mechanism unit 3.

  More specifically, as shown in FIGS. 1 and 2, the open / close circuit unit 11 is rectified with a rectifier circuit 14 that converts an AC voltage applied from the external power supply 12 to the external power input terminal 13 into a DC voltage. The direct current is passed through the rectifier circuit output terminal 15 to the capacitors 16a and 16b, the charge circuit 20 accumulates charges in the capacitors 16a and 16b, and the accumulated charges are discharged from the capacitors 16a and 16b to the solenoid 5. It is mainly comprised by the discharge circuit 21 to supply. And the relay 25 which further switches to either the charging circuit 20 or the discharge circuit 21 with the connection state of the external power supply 12 and the switching circuit part 11 is further comprised. The capacitors 16a and 16b correspond to the power storage means in the present invention.

  Here, the external power source 12 uses a 24V AC power source, and the rectifier circuit 14 is a capacitor input type smoothing circuit in which a smoothing capacitor 31 is electrically connected in parallel to a full-wave rectifier circuit using a diode bridge 30. Yes.

  The solenoid 5 is a suction type open frame square DC solenoid. This is a very simple structure among various types of solenoids, and is small and lightweight, and exhibits a relatively large suction force (about several kg). Since this suction force varies depending on the shape of the plunger and the fixed iron core, when a larger suction force is required, a round solenoid or the like can be used in consideration of the type and size of the solenoid. However, in the self-holding type direct current solenoid having a built-in permanent magnet, the plunger once attracted to the fixed iron core maintains the state even when the current is interrupted, and returns the damper opening / closing mechanism 3 to the initial state in the non-energized state. Therefore, it cannot be used for the opening / closing device 1 of the present embodiment. Further, when the temperature rises due to a fire, the force for attracting the plunger is reduced due to the change in the resistance value of the coil in the solenoid. Therefore, the plunger 4 necessary for operating the damper opening / closing mechanism 3 is taken into consideration. And a solenoid corresponding to the suction force is selected.

  Furthermore, the capacitors 16 a and 16 b use two electrolytic capacitors (capacity 2200 μF, withstand voltage 35 V) electrically connected in parallel with each other, and each is connected to the rectifier circuit output terminal 15. At the same time, in order to prevent overcurrent to the capacitors 16a and 16b, a protective resistor 33 (resistance 100Ω) is provided between the rectifier circuit output terminal 15 and the capacitors 16a and 16b.

  The relay 25 is a mechanical type that mechanically opens and closes the contact 25s using an electromagnet. When the current flows through the relay 25, the contact 25s opens and the current to the relay 25 is interrupted. The contact point 25s is connected to be closed. That is, from the state in which current flows through the charging circuit 20 and charges are accumulated in the capacitors 16a and 16b and no current flows through the solenoid 5, the discharge circuit 21 is closed and current is passed from the capacitors 16a and 16b to the solenoid 5. The operation of switching to the flowing state is performed according to the electrical connection state between the external power supply 12 and the switching circuit unit 11. At this time, in order to prevent the charge accumulated in the capacitors 16a and 16b from flowing into the charging circuit 20 instead of the discharging circuit 21, the diode 36 is connected to the cathodes of the capacitors 16a and 16b in the charging circuit 20. It is connected in series with the positive electrode side.

  Further, as shown in FIGS. 3 and 4, the damper opening / closing mechanism 3 adjusts the angle of the damper 45 by rotating the damper shaft 40, the manual lever 41 for manually rotating the damper shaft 40, and the damper shaft 40. An air volume adjusting plate 47 for changing the air volume flowing through the duct, a spring 48 for biasing the damper shaft 40, and a hollow fixture for passing the damper shaft 40 through the manual lever 41 49, a locking claw 50 attached to the fixture 49, a locking plate 52 having a locking receiving portion 51 that engages with the locking claw 50, and the tip of the plunger 4 of the solenoid 5. When the connecting plate 53, the locking plate 52 and the connecting plate 53 are connected, and the damper shaft 40 is locked at a predetermined rotational position by the engagement of the locking claw 50 and the locking receiving portion 51, and the plunger 4 is driven. The locking claw 50 and the locking receiver A plurality of locking plates 55, 56 to release the engagement of 51, locking plate shaft 55a, 56a, and a locking plate spring 58 is configured mainly provided.

  Here, the damper switch 2 in which the switchgear 1 of the present embodiment is used is mainly constituted by the switchgear 1 and the damper opening / closing mechanism 3 described above, except for the manual lever 41, the air volume adjusting plate 47 and the like. The portion is housed in a box 65 and is covered with a plurality of lids 66a, 66b and the like. Further, an L-shaped fixture 71 is installed on the bottom side surface of the box 65 in order to install the damper switch 2 on the side surface of the damper casing 70 connected in the middle of the duct. In FIG. 3, for the sake of simplicity of explanation, the lid (not shown) covering the solenoid 5 and the locking plates 52, 55, 56, etc. is shown in a removed state. In the damper switch 2, the components such as the capacitors 16 a and 16 b, the diode bridge 30, the relay 25, and the diode 36 that form the switching circuit unit 11 of the switching device 1 are disposed on the electronic substrate 26. The lead wire 72 for output to the solenoid 5 is electrically connected to the open / close circuit unit 11 on the electronic board 26.

  Further, as shown in FIG. 4, in a state where the damper switch 2 using the switchgear 1 is installed on the side surface of the damper casing 70, the damper shaft 40 is fitted to the bearing 73 and the damper shaft 40 rotates. As a result, the damper 45 opens and closes. Therefore, the opening / closing of the damper 45 can be controlled by controlling the operation of the damper opening / closing mechanism 3 and controlling the rotation of the damper shaft 40.

  Next, the usage method of the switchgear 1 of this embodiment is described. First, the operation in the energized state will be described with reference to FIG. When an AC voltage is applied from the external power supply 12 to the external power supply input terminal 13 by turning on the external switch 75, the AC voltage is rectified from the AC to the DC via the rectifier circuit 14, and the DC voltage is applied to the rectifier circuit output terminal 15. . Thereby, a direct current flows through the capacitors 16a and 16b, and electric charges are accumulated in these capacitors 16a and 16b. When this charge is accumulated, an overcurrent directed to the capacitors 16a and 16b is prevented by the protective resistor 33. At this time, since a current also flows through an electromagnet (not shown) in the relay 25, a metal piece (not shown) at the contact 25s is attracted to the electromagnet, and the contact 25s is open. Therefore, since the discharge circuit 21 is not closed and no current flows through the solenoid 5, charge accumulation in the capacitors 16a and 16b is maintained.

  When in this energized state, the damper 45 is set in an open state in advance. That is, as shown in FIG. 3, the locking claw 50 installed on the damper shaft 40 and the locking receiving portion 51 of the locking plate 52 are engaged. At this time, since the damper 45 is opened against the spring 48 by the operation of the manual lever 41, the damper shaft 40 is biased in the direction to close the damper 45 by the spring 48. . At this time, no current flows through the solenoid 5 and the plunger 4 is not operating. Therefore, the plunger 4 is pulled out of the coil 5 a of the solenoid 5 by the locking plate spring 58. As a result, the locking plate 56 that is rotatably installed around the locking plate shaft 56 a stops at a predetermined position in conjunction with the plunger 4 and the connecting plate 53. At this time, the locking claw 50 and the locking receiving portion 51 engage with each other against a spring (not shown) installed on the locking plate shaft 55 a that connects the locking plate 52 to the locking plate 55. This engagement state is formed at the lower portion of the locking plate shaft 56a, and the end where the locking receiving portion 51 of the locking plate 52 is formed by the locking portion 56b that rotates as the locking plate 56 rotates. The other end facing the portion is held by being locked.

  After that, when the current from the external power supply 12 to the switching circuit unit 11 is interrupted by a power failure associated with the occurrence of a fire or the like, or by disconnecting the electric wire or turning off the external switch 75, as shown in FIG. Since the current is also cut off, the contact 25s is closed, and the discharge circuit 21 connecting the capacitors 16a and 16b and the solenoid 5 becomes a closed circuit. At this time, the inflow of current to the charging circuit 20 side is prevented by the diode 36, so that the charge accumulated in the capacitors 16 a and 16 b flows to the solenoid 5. As a result, a current flows through the coil 5 a of the solenoid 5 to generate a magnetic flux, and the plunger 4 is magnetically attracted to the fixed iron core 5 b of the solenoid 5. FIG. 2 shows a state where the current is interrupted by the external switch 75 being turned off.

  By driving the plunger 4, the connecting plate 53 connected to the plunger 4 is also pulled toward the solenoid 5. Along with this, the locking plate 56 connected to the connecting plate 53 rotates counterclockwise around the locking plate shaft 56a, and the locking of the locking plate 52 by the locking portion 56b is released. As a result, the engagement between the engagement receiving portion 51 of the engagement plate 52 and the engagement claw 50 of the damper shaft 40 is released, and the damper shaft 40 biased in the direction of closing the damper is restored to the spring 48. The damper 45 is rotated by force and the damper 45 is closed.

  Since the discharge of the solenoid 5 described above is completed in a short time (about several seconds), the plunger 4 is immediately released from the magnetic attraction by the fixed iron core 5b due to the disappearance of the magnetic flux in the solenoid 5 after operating the pulling of the connecting plate 53. Then, it is pulled by the locking plate spring 58 and returns to the state of being pulled out from the coil 5a of the solenoid 5 again. Therefore, if necessary, the engagement receiving portion 51 of the engagement plate 52 and the engagement claw 50 of the damper shaft 40 can be engaged again to return the damper 45 to the open state. That is, even when the non-energized state continues due to a power failure or a broken wire, the damper 45 can be manually returned to the initial open state.

  Therefore, as described above, according to the switchgear 1 of the present embodiment, the charge accumulated in the capacitors 16a and 16b during energization is released when the current is interrupted, and is supplied to the solenoid 5 to supply the plunger. 4, and the damper opening / closing mechanism 3 is controlled in conjunction with the driving of the plunger 4 to close the damper 45. Thus, the opening / closing device 1 that opens the damper 45 in the energized state and closes the damper 45 when the current is interrupted is generally used in a ship in which various devices are always energized. Suitable for controlling opening and closing. Furthermore, even if a power outage or wire breakage occurs in the event of a fire, the damper 45 can be reliably closed, which is a desirable aspect in terms of fire prevention measures. Further, since the damper 45 is quickly closed by the quick response of the plunger 4 of the solenoid 5, it is possible to effectively prevent diffusion of flame and smoke through the duct.

  In addition, by using a plurality of capacitors 16a and 16b, even if one of them is damaged during a fire or the like, electric charge is supplied to the solenoid 5 by the remaining capacitor 16, and the damper 4 is reliably driven by driving the plunger 4. The damper mechanism 45 can be closed by controlling the opening / closing mechanism 3. Furthermore, by further increasing the number of capacitors 16 connected in parallel, it is possible to increase the total capacity that can be stored while preventing the switchgear 1 from increasing in size, and supply larger electric energy to the solenoid 5. In addition, the damper opening / closing mechanism 3 can be controlled by larger mechanical energy.

  In addition, a very simple design change was made to the fire damper open / close device that uses a conventional electric motor (open when not energized, closed when energized), replacing the electric motor with a solenoid, and adding a capacitor to the electric circuit. Etc., the switchgear 1 of the present embodiment (opened when energized, closed by shutting off the current) can be configured, and a mold for manufacturing a conventional damper switchgear can be used as it is. It also has the advantage of

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  For example, an open / close device for a fire prevention damper is generally implemented that includes a thermal fuse, and closes the damper by interlocking the damper open / close mechanism with melting of the thermal fuse due to temperature rise in the duct. In such an opening / closing device, the temperature fuse and the damper opening / closing mechanism are configured so that the plunger is pushed into the coil of the solenoid when the temperature fuse is melted, thereby controlling the opening / closing of the damper by driving the plunger. The configuration of the switchgear 1 of the embodiment can be used as it is. As a result, even if the current from the external power source is not cut off, the damper opening / closing device operates automatically upon detecting a temperature rise due to the occurrence of a fire, and the fire damper can be closed. Therefore, when the switchgear closes the damper, it has two means: power failure, wire breakage, or external power-off operation by the operator, and thermal fuse. It will be something like that.

  In addition, it is equipped with a smoke detector, and when the smoke detector detects smoke from a fire, etc., it can be used effectively as an open / close device for a fire and smoke damper by connecting so that the external switch is turned off. Is possible.

  Furthermore, a light-emitting diode is connected to the output terminal of the rectifier circuit, and the pilot lamp is turned on when energized, that is, when the damper is open, and turned off when the current is interrupted, that is, when the damper is closed. Thus, the operator can visually recognize the open / closed state of the damper in the ducts arranged vertically and horizontally in various plants and the like, and can centrally manage the damper using the damper open / close device.

  The mechanical structure of the damper opening / closing mechanism section, such as the locking plate and the locking plate shaft, is not limited to that shown in the present embodiment, and a configuration capable of controlling the rotation of the damper shaft by driving the plunger can be used. It is. In the present embodiment, an AC power supply is used, but a DC power supply can be used.

It is a circuit diagram which shows the structure of the switchgear in an energized state. It is a circuit diagram which shows the structure of the switchgear in a non-energized state. It is explanatory drawing which shows schematic structure of the damper switch using a switching device. It is explanatory drawing which shows the use condition of an opening / closing apparatus.

Explanation of symbols

1 Opening and closing device (damper opening and closing device)
3 Damper open / close mechanism 4 Plunger 5 Solenoid 11 Open / close circuit 12 External power supply (AC power supply)
14 Rectifier circuit 16a, 16b Capacitor (electric storage means)
20 Charging circuit 21 Discharging circuit 25 Relay 45 Damper

Claims (3)

A solenoid having one end connected to the damper opening / closing mechanism and a solenoid capable of electrically controlling the damper opening / closing mechanism according to the driving of the plunger;
An external power source, the solenoid, and a power storage means capable of storing charge for driving the plunger are electrically connected to each other, a charging circuit for storing the charge in the power storage means, and the charge stored in the power storage means An open / close circuit part in which a discharge circuit for discharging is formed;
According to the connection state of the open / close circuit unit and the external power supply, comprising a relay that switches to either the charging circuit or the discharging circuit,
The relay is
When the open / close circuit unit and the external power supply are in an electrically connected state, the charge circuit is switched to store the charge in the power storage means, and the open / close circuit unit and the external power supply are electrically disconnected. When this is done, the electric charge accumulated in the power storage means by the discharge circuit is discharged and supplied to the solenoid, the plunger of the solenoid is driven, and the damper opening / closing mechanism is linked to the plunger, A damper opening and closing device that changes the damper from an open state to a closed state. The switching circuit part is
The damper opening / closing device according to claim 1, further comprising a rectifier circuit that rectifies an alternating current and converts the current into a direct current.   The damper opening / closing device according to claim 1 or 2, wherein a plurality of the electric storage means are used and are arranged in an electrically parallel state to each other.

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