JPS5929272Y2 - A sensing device that allows a heat detector or smoke detector to be directly connected to a motor-driven smoke and fire damper. - Google Patents

Description

[Detailed description of the invention] This invention operates a smoke and fire prevention damper that cuts off air circulation in the duct in the event of a fire in a tail cooling, heating, or air conditioning duct that is installed through the fire protection compartment of a building. Regarding equipment.

Conventionally used smoke and fire dampers whose blades are operated by a motor are equipped with heat detectors 1 or smoke detectors 2 installed on each floor or in each room, as shown in Figure 1, for example. Wire the signal of heat detector 1 or smoke detector 2 3
The medium fire monitoring board 4 receives this signal and uses the wiring 5 led out from the central monitoring board 4 to send the signal to the smoke and fire dampers 6 installed in the ducts on each floor.
The structure is such that power is transmitted to the motor 8 of the motor drive mechanism 7, the motor 8 is used as a rotation source, and the blades 9 of the damper 6 are placed in the closed position.

However, with the above structure, the electrical signal from the heat detector 1 or smoke detector 2 is transferred to the central monitoring panel 4, and from the central monitoring panel 4 the power is transmitted to the motor 8 that operates the blades 9 of the damper 6. In large-scale buildings such as high-rise buildings, the space for wiring 3 and 5 becomes a problem, and the electrical wiring and distribution work becomes troublesome, resulting in an increase in the amount of work.

An example of the electrical circuit of a conventionally used smoke and fire damper is shown in Figure 2, where the direction of the current flowing between terminals 10 and 11 is changed by a central monitoring panel to Since the vanes 9 of the damper 6 were opened and closed, it was not possible to directly introduce the signal of the heat sensor 1 or the smoke detector 2 to the motor drive mechanism 7, and therefore the heat and Since it was not possible to detect the state of the smoke, the blades were not operated appropriately in that state.

This invention was made in view of the above, and its outline is in the third section.
As shown in the figure, a current is sent from the central monitoring panel 12 to the motor drive mechanism 13 installed in the duct on each floor, and this current circuit is used to detect heat detectors 14 and smoke detectors installed on each floor and in each room. The signal from the device 15 is directly introduced into the motor drive mechanism 13 to open and close the blade 17 of the smoke and fire prevention tapper 16.An embodiment of the present invention will be described below with reference to FIG. The actuating device of the smoke and fire damper includes a motor drive mechanism 13 that drives the blades 17 of the damper 16, a medium fire monitoring board 12 that supplies power to the motor drive mechanism 13 and controls only during manual operation.
It consists of a switch-like heat sensor 14 that is turned on by heat and a switch-like smoke sensor 15 that is turned on by smoke.

The motor drive mechanism 13 has a first relay 21 and a second relay 27, and a first contact 22.2 that turns on the positive and negative power supplies by the operation of the first relay 21.
3 to the motor 24, and further connected to the second relay 27.
The first relay 21 and the second relay 2 are connected to the motor 24 through the second contacts 28 and 29, which are turned ON by the operation of the
7 controls the forward and reverse rotation of the motor 24.

Furthermore, it is brought into contact with a cam 34 that is interlocked with the blade 17 of the damper 16 operated by the motor 24, and the blade 17
When the blade 17 is opened, it is ON and l), and when the blade 17 is closed, it is OFF.
The first micro inch 35 is connected to the first relay 21.
is connected in series to the cam 34 which operates in conjunction with the vane 17, and when the vane 17 is closed, the O
N, and a second microswitch 36 that turns OFF when the blade 17 is opened is connected in series to the second relay 27,
Negative input sides 26 a and 26 b of the first contact 21 and the second contact 27, and the first relay 21
a negative input terminal 39 connected in parallel with the wiring derived from the first relay 21 and the terminal 44 on the opposite side of the first microswitch 35 connected to the first microswitch 35; and a positive input of each of the first contact 21 and the second contact 27. Sides 25a, 25
b, and a positive input terminal 38 connected in parallel with the wiring derived from the terminal 45 on the opposite side of the second relay 27 in the second microswitch 36 connected to the second relay 27.
and the first relay connected in parallel.
It is configured by providing each terminal.

On the other hand, the medium heat monitoring board 12 includes a DC power supply 18, a positive terminal 46 and a negative terminal 47 derived from the DC power supply 18.
and a changeover switch 30 that switches between positive and negative current from the DC power supply 18, which turns this current ON and OFF.
It consists of a push button switch 37, and wiring in which switching terminals 48 led out from the push button switch 37 are connected in series.

The heat sensor 14 and the smoke detector 15 are connected in parallel, and their terminals 4L42 are directly connected to the positive input terminal 38 and the relay terminal 40, respectively, and the positive terminal 46 is connected to the positive input terminal 38. The negative terminal 47 is connected to the negative input terminal 39, and the switching terminal 48 is connected to the relay terminal 40 by wiring 19, 20, 31, respectively.
It is connected by.

The device of the present invention is as described above, and since the heat detector 14, smoke detector 15, and pushbutton switch 37 are OFF in normal times, the blades 17 of the damper 16 are also in the open state as shown in FIG. 24 is stopped.

At this time, the cam 34, which rotates in conjunction with the blade 17, is in a position as shown in FIG. 6, the first microswitch 35 is turned on, and the second microswitch 36 is turned off.

In the event of a fire, heat detector 14 or smoke detector 15
When either or both detect heat or smoke and turn on, the power supply 18, the positive I exposed wire 19, the terminal 38,
Wiring 41, heat sensor 14 or smoke detector 15, wiring 42,
Terminal 40, first relay 21, first microswitch 35
, a closed circuit is formed for the negative side wiring 20, and the first relay 21
The first contacts 22 and 23 are turned on by the excitation of The contact of the switch 35 is connected to the recess 43 of the cam 34.
, the first microswitch 35 is turned OFF.
The current flow stops and the motor 24 stops.

To open the blade 17 when it is in the closed state, switch the selector switch 30, which was in the direction of the positive side arrangement 19 as shown in FIG. When pressed, the closed circuit of the power supply 18, positive side wiring 19, positive input terminal 38, second micro switch 36, second relay 27 relay terminal 40, pushbutton switch 3γ, changeover switch 30, and negative wire 20 is closed. The second relay 27 is energized, the second contacts 28 and 29 are turned on, and the motor 24 is reversely rotated, returning the damper vane 17 from the closed position to the open position.

When the blade 17 returns to its normal position, the contact of the second microswitch 36 falls into the recess 43 of the cam 34, so the second microswitch 36 is turned OFF and the motor 24 is stopped.

After this, when the changeover switch 30 is switched to the positive side wiring 19 direction, the heat sensor 14 or smoke sensor 15
N or forcibly activates the pushbutton switch 37 1
In this case, the vanes 17 of the damper 16 will not operate.

In the device of this invention, as a test or in an emergency, the motor 27 is forcibly rotated by manually turning on the pushbutton switch 3γ, and the blade 17 of the Dan'<-16
is closed.

The present invention is as described above, and by providing a terminal in the damper's motor drive mechanism and connecting a heat sensor or smoke detector to this terminal, the damper can be closed by turning on the heat sensor or smoke sensor.
Not only is the construction easier as it can be done while the damper is closed, it can also significantly reduce the cost of wiring equipment, and it also requires less space for wiring. The blades can be opened easily, and the blades can be closed using a manual push button switch installed in the same circuit, and can be opened and closed as desired in combination with a changeover switch. Since the damper is located near the damper blades, heat and smoke can be detected at the location where the damper blades are installed, and the blades can be operated appropriately, which is a useful effect in practice.

In particular, with this invention, the blades and cams are interlocked, and a microswitch is brought into contact with the cam to automatically cut off the current and stop the motor when the blades are fully open and fully closed, thereby preventing overspeeding of the motor. It is possible to operate reliably even in the event of a malfunction due to

[Brief explanation of the drawing]

Figure 1 is a wiring system diagram of a conventional smoke and fire damper, Figure 2 is an internal circuit diagram of a conventional smoke and fire damper, Figure 3 and the following are examples of the present invention. System diagram of the smoke fire damper, Figure 4 is a wiring diagram showing an example of the electric circuit,
FIG. 5 is a state diagram when the damper is open, and FIG. 6 is a diagram showing the relationship between the cam and the microsinch when the damper is open. 12... Central monitoring board, 13... Motor drive mechanism,
14...Heat detector, 15...Smoke detector, 16...
Smoke and fire damper 17...Blade, 18...DC power supply, 19-i! ! 1 line, 20... Wiring, 21...
First relay, 22 and 23--First contact, 24--Motor, 25a, 25b...Plus input side, 26a,
26b...Minus input side, 27...Second relay,
28, 29...second contact, 30...changeover switch,
31... Wiring, 34... Cam, 35... First micro inch, 36... Second micro inch, 37
・Push button switch, 38-...Plus input terminal, 3
9...Minus input terminal, 40...Relay one terminal, 4
1 and 42... Wiring, 43... Recess, 44... Terminal, 45... Terminal, 46... Positive terminal, 47...
Negative terminal, 48...(b) Replacement terminal.

Claims (1)

[Scope of utility model registration request] A motor drive mechanism that drives the damper blades, a central monitoring board that supplies power to the drive mechanism and controls only during manual operation, a switch-like heat sensor that is turned on by heat, and a switch-like heat sensor that is turned on by smoke. The motor drive mechanism has a first relay and a second relay, and has a first contact and a second contact that are turned ON by the operation of the second relay and the second relay, respectively. It is connected to a motor to control forward and reverse rotation of the motor, and is brought into contact with a cam that operates in conjunction with the blades of the damper operated by the motor, and is turned on when the blades are opened and turned OFF when the blades are closed. A microswitch is connected in series to the first relay and brought into contact with a cam that operates in conjunction with the blade, and a microswitch that is turned ON when the blade is closed and OFF when the blade is opened is connected to the first relay. Connect the two relays in series, and connect the negative input side of each of the negative contact and the second contact to the terminal opposite to the first relay of the microswitch connected to the first relay in parallel. Connect in parallel the connected negative input terminals, the positive input sides of each of the negative contact and the second contact, and the wiring led out from the terminal on the opposite side of the second relay in the microswitch connected to the second relay. The central monitoring board includes a positive input terminal connected to the first relay and the second relay in parallel, and a positive input terminal connected to the first relay and the second relay in parallel. and a negative terminal, a changeover switch that switches between positive and negative current from the DC power supply, a pushbutton switch that turns this current ON and OFF, and wiring that connects in series the switching terminals derived from the pushbutton switch. The heat sensor and the smoke detector are connected in parallel, and their terminals are directly connected to the positive input terminal and the relay terminal, respectively, and the positive terminal is connected to the positive input terminal, and the negative terminal is connected to the negative input terminal. An operating device for a smoke and fire prevention damper, characterized in that the switching terminal is connected to a terminal and the switching terminal is connected to a relay terminal by wiring, respectively.