JP2000287386A - Shutter emergency power device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the burning of an inverter even when a power supply is connected by mistake by installing a voltage detector on a circuit from the inverter to an electric shutter while inhibiting the starting of the inverter when the voltage detector detects voltage. SOLUTION: A voltage detector 13 is mounted between an inverter 12 and a changeover circuit 13, and the presence of voltage at the place of connection is detected and the signal is transmitted to a control section 11. An oscillation command circuit 11a controlling the oscillation of the inverter 12 and a starting inhibiting circuit 11b transmitting an inverter-starting inhibiting signal are mounted on the control section 11. Accordingly, when a test switch for an inverter performance test is depressed, the voltage detector 15 detects voltage by the reverse current of a temporary power supply 31 before an oscillation command is outputted from the oscillation command circuit 11a to the inverter by the control section, the inverter is left as it is stopped, and a current from the temporary power supply 32 is not reversed, thus preventing the burning of the inverter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter emergency power supply device used for an electric shutter for buildings, and more particularly, to a shutter emergency power supply device provided with an inverter protection means in an inverter built in the emergency power supply device.

[0002]

2. Description of the Related Art Conventionally, there has been a demand to open an electric shutter for closing an opening of a building for evacuation or fire fighting in the event of a fire. ), A shutter emergency power supply device has been developed that starts up in response to this and sends a drive power supply and a shutter release signal to the electric shutter. At the time of fire, the shutter emergency power supply unit sends a drive power supply and a shutter open signal by an emergency power supply in the event of a power failure (when there is no power failure (hereinafter referred to as a non-power failure) by a commercial power supply), A commercial power supply for normally opening and closing the electric shutter is supplied. However, at the construction site of a large building, the electric shutter was installed first, but before the emergency power supply was installed, or even if the emergency power supply was already installed, the emergency power supply was located in a remote place such as an underground machine room. ,
There is a case where the breaker of the emergency power supply device remains OFF and commercial power is not supplied to the electric shutter. In this case, a temporary power supply for construction is directly connected to the electric shutter to open and close the shutter. Is done.
Then, after the emergency power supply was installed or the breaker was turned on and commercial power was supplied from the emergency power supply, the electric shutter was connected to the temporary power supply and the two power supplies from the emergency power supply. become.

FIG. 4 is a block diagram showing a state in which the above-mentioned two power supplies are connected, in other words, a state in which a power supply is connected to the input side and the output side of the shutter emergency power supply device, respectively (conventional). The shutter emergency power supply device 1 ′ normally supplies a commercial power supply 30 connected to the input breaker 18 from the output breaker 19 to the shutter control panel 5 via the switching circuit 13, which will be described later. An emergency power supply (AC power supply) is generated from the inverter 14 by the inverter 12, and is supplied from the output breaker 19 to the shutter control panel 5 via the switching circuit 13. The switching circuit 13 is provided with a power monitoring relay 17 for determining a power failure / non-power failure (specifically, the control unit 11 determines a power failure / non-power failure based on the state of the relay contact 17b and outputs a switching signal). Switching to the inverter 12 (emergency power supply) side and to the input breaker 18 (commercial power supply) side during non-power failure are controlled. Reference numeral 20 denotes a phase sequence changeover switch 20 and 2 provided only when generating a three-phase alternating current as an emergency power source. A water pressure release device 2 detects a water supply of the fire brigade and transmits an activation signal to the shutter emergency power source device 1. is there. Reference numeral 31 denotes a temporary power supply 31 directly connected to the shutter control panel 5,
, The temporary power supply 31 is connected to the output breaker 19.

[0004] Then, without removing the temporary power supply 31 (while the temporary power supply 31 is connected to the output breaker 19),
Inverter 12 built into shutter emergency power supply 1 '
When the operation test was performed, the following problem occurred. In the operation test of the inverter 12, the input breaker and the output breaker are turned OFF to simulate a power failure state, inspection of wiring and each part of the device is performed, and then the output breaker 19 is turned ON to perform a test (not shown) for an inverter operation test. When the switch is pressed, the inverter 12 starts oscillating. At the same time, a current flows from the temporary power supply 31 connected to the output breaker 19 back to the inverter 12 via the switching circuit 13 so that the inverter 12 constitutes a power transistor (not shown). (Output circuit) and the components of the internal oscillation circuit.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and is intended to perform an operation test of an inverter in a state where a power supply is erroneously connected to an output side of a shutter emergency power supply device. An object of the present invention is to provide a shutter emergency power supply device that can prevent burnout of an inverter even when it is performed.

[0006]

Means for Solving the Problems The technical means adopted by the present invention for solving the above-mentioned problems has a switching circuit for switching between a commercial power supply and an emergency power supply. In a shutter emergency power supply device that activates a built-in inverter and supplies emergency power at the time of a power failure and when a start signal is received, a voltage detection device is provided on a circuit from the inverter to the electric shutter, and the voltage detection device detects a voltage. An inverter protection means for prohibiting the activation of the inverter when detected is provided.

[0007]

FIG. 1 is a schematic perspective view of an electric shutter provided with a shutter emergency power supply device according to the present invention, wherein 1 is a shutter emergency power supply device 1 installed in an underground machine room or the like of a building; Reference numeral 3 denotes an electric shutter 3 installed at the opening of the building, and 2 denotes a hydraulic pressure release device 2 installed adjacent to the electric shutter 3. Reference numeral 4 denotes an electric switch 4 for opening and closing the shutter curtain, and reference numeral 5 denotes a shutter control panel 5 for controlling the electric switch 4. The water pressure release device 2 includes an outdoor water supply port 2a to which a fire brigade connects a fire hose in the event of a fire, and a start switch 2b for detecting a water flow sent from the outdoor water supply port 2a. In the event of a fire, when the fire brigade connects a fire hose to the outdoor water outlet 2a and sends water at a predetermined water pressure and amount, the start switch 2b is activated, and a water pressure detection signal (start signal of the present invention) is sent from the start switch 2b. A power supply for driving and a shutter opening signal are sent from the shutter emergency power supply device 1 that has received the signal to the electric shutter control panel 5, and the shutter curtain is opened to a predetermined height. These basic configurations are all conventional.

Next, referring to FIGS. 2 and 3, a shutter emergency power supply device 1 having an inverter protection means according to the present invention will be described.
However, the same components as those of the conventional emergency power supply device 1 'will be described with the same reference numerals. FIG.
In (a), the flow of the electric power supply for driving the electric shutter is represented by a double line, and the flow of the control signal and others is represented by a single line. The shutter emergency power supply device 1 normally controls the commercial power supply 30 connected to the input breaker 18 from the output breaker 19 via the switching circuit 13 (switched to the input breaker 18 side as determined as non-power failure). It is supplied to the panel 5. At the time of fire and at the time of non-power failure, when the control unit 11 receives the water supply detection signal F for a predetermined time (TM2) (determines that the signal from the fire brigade has been received formally), the control operation for fire starts. Then, the switching circuit 13 is switched to the inverter 12 side for a certain period of time (TM3) to temporarily stop the supply of the commercial power supply 30, and then the commercial power supply 30 and the shutter release signal S are transmitted for a predetermined time (TM1) to set the electric shutter 3 to a predetermined time The shutter is opened to the height and the commercial power supply is temporarily stopped (TM3) to stop the shutter.

When a power failure occurs during a fire and during a power failure or during operation, the storage battery 1 is used instead of the commercial power supply 30.
4 and the inverter 12 supply emergency power, and the inverter 12 controls the control unit 11 to output a water pressure detection signal for a predetermined time (T
M2) After receiving and lapse of a predetermined time (TM3), oscillation is started by an oscillation command from the control unit 11. Reference numeral 16 denotes a power supply unit 1 that supplies power for operation to the control unit 11 and charges the storage battery 14.
Reference numerals 6 and 17b 'denote relay contacts 17b' for automatically switching the power supply for operation of the control unit 11 during a power failure or non-power failure, and TM1 to TM3 denote timers built in the control unit 11. The operation is the same as the conventional one, and the details are omitted.

A voltage detector 15 is provided between the inverter 12 and the switching circuit 13. The voltage detector 15 is composed of a diode D, a limiting resistor R and a photocoupler Pc. Is detected and the signal is sent to the control unit 11. Control unit 11
The oscillation command circuit 1 for controlling the oscillation of the inverter 12
1a, and a start prohibition circuit 11b (an inverter protection means of the present invention) for receiving a signal from the voltage detection device 15 and transmitting an inverter start prohibition signal to the oscillation command circuit 11a. The oscillation command circuit 11a
When an inverter start prohibition signal is sent from a start prohibition circuit 11b which detects the voltage of this emergency power supply through a voltage detection device 15 after sending an oscillation command and causing the inverter 12 to oscillate and generate an emergency power supply, The system is configured to ignore the start prohibition signal.

In the shutter emergency power supply device 1 configured as described above, the temporary power supply 31 is connected to the shutter control panel 5.
Is connected, when the operation test of the inverter 12 is performed, first, the input / output breakers 18 and 19 are turned off (OF).
F) At this point, the power monitoring relay 17 is turned off,
The control unit 11 determines that a power failure has occurred and switches the switching circuit 13 to the inverter 12 side. Then, when the test switch for the inverter operation test is pressed, the control unit 11 performs control for fire (when the first switch (TM2) does not operate in the case of the test switch and the test switch is pressed). The operation starts, but the timer (TM3) built in the control unit 11 times out and the oscillation command circuit 11a sends the inverter 1
Before the oscillation command is output to the power supply 2, the voltage detection device 15 detects the voltage due to the reverse flow of the temporary power supply 31 and
b transmits an inverter start prohibition signal. as a result,
Since the inverter 12 remains stopped and the current does not flow backward from the temporary power supply 31 inside the inverter 12, burning of the inverter 12 can be prevented.

Incidentally, the inverter protection means may be configured so as to disconnect the inverter 12 from the circuit instead of prohibiting the start of the inverter.
The voltage detection device 15 may be provided between the inverter 12 and the shutter control panel 5, but the temporary power supply 31 may be connected to any part of the wiring between the shutter emergency power supply 1 and the shutter control panel 5. In order to enable the detection, it is preferable to provide between the inverter 12 and the output breaker 19.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an electric shutter provided with a shutter emergency power supply device according to the present invention.

FIG. 2A is a block diagram for explaining an internal configuration of a shutter emergency power supply device and a connection between the emergency power supply device, a shutter control panel, and a water pressure release device. (B)
FIG. 3 is a block diagram for explaining operations of a voltage detection device and a control unit.

3A and 3B are time charts of a fire emergency operation of the shutter emergency power supply device, in which FIG. 3A shows a case where there is no power failure, FIG. 3B shows a case where a power failure occurs, and FIG. 3C shows a case where a power failure occurs during operation.

FIG. 4 shows the internal configuration of a conventional shutter emergency power supply device,
FIG. 3 is a block diagram in a case where power is connected to an input side and an output side of the emergency power supply device.

[Explanation of symbols]

 Reference Signs List 1 'Conventional shutter emergency power supply device 1 Shutter emergency power supply device 2 Water pressure release device 3 Electric shutter 5 Shutter control panel 11 Control unit 11b Startup prohibition circuit 12 Inverter 13 Switching circuit 15 Voltage detection device 30 Commercial power supply 31 Temporary power supply

Claims (1)

[Claims] A switching circuit for switching between a commercial power supply and an emergency power supply;
In a shutter emergency power supply device that supplies commercial power to the electric shutter during normal times, and activates the built-in inverter when a power failure occurs and receives a start signal, and supplies emergency power,
A shutter emergency power supply device comprising: a voltage detection device provided on a circuit from the inverter to the electric shutter; and an inverter protection means for prohibiting activation of the inverter when the voltage detection device detects a voltage.