JP2010252425A - Apparatus power control apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To recover an apparatus, without requiring the user to go to the site in case that the electrical apparatus stops or ceases to operate normally. <P>SOLUTION: In a power on-off switching control circuit 4, normally, contacts SW1-SW3 are open, and contacts SW4 and SW5 are closed. A relay Ry1 closes the switch SW1, when it receives a high temperature signal from a temperature sensor 6. A relay Ry2 closes the contact SW2, when it receives a signal from a slave station 7b. The slave station 7b transmits a signal to the relay Ry2, when it receives a reset signal for an air conditioner 5 from a key station 7a. An AC short voltage relay UV closes the switch SW3, when it detects power failure, etc. A timer relay TM opens the switch SW4 only for a specified time, when any one contact closes among the contacts SW1, SW2, and SW3 which are in parallel contact. The relay Ry opens the contact SW5, when the contact SW4 is open. With the closing/opening of the contact SW5, the supply/stoppage of power to the air conditioner 5 is switched. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a control device that turns on or off power to an electrical device depending on the situation.

A communication machine room is installed at a transmission line relay station or the like. The air conditioner in the communication machine room has the following problems.
(1) The control circuit of the air conditioner malfunctions due to surge noise or the like due to lightning, and the air conditioner stops or is in a blowing state.
(2) The control circuit of the air conditioner malfunctions due to repetition of power recovery / power failure within a short time of the commercial power supply, and the air conditioner is stopped or blown.
(3) The room temperature of the communication machine room rises, causing adverse effects such as unstable operation of the communication equipment and shortening of the service life. In particular, the MSE type storage battery of the DC power supply device has its life reduced by half when the room temperature is raised to 30 degrees.
(4) In the case of (1) to (3), the maintenance staff goes to the site, the air conditioner is turned off and then turned on again to recover.

Japanese Utility Model Publication No. 5-4220

  By the way, a power failure compensation circuit has been conventionally installed in the communication machine room to take measures against power failure, but it has no effect on surge noise caused by lightning. In addition, since a commercially available power failure compensation circuit does not have an external reset signal input terminal, it cannot be remotely controlled from a monitoring control device of a communication facility.

  Patent Document 1 discloses a power reset unit for an air conditioner that quickly resets a control circuit when the power is turned off. However, since this reset unit only resets the control circuit, unstable power supply is disclosed. It cannot cope with the malfunction of the air conditioner due to.

  The present invention has been made in view of the above problems, and its main purpose is to recover the equipment without going to the site when the electrical equipment stops or does not operate normally. .

  In order to solve the above-mentioned problems, the present invention provides a device power supply control device that connects or disconnects an electrical device and its power source, and detects the power failure or voltage drop when the power source is detected. And a means for connecting the electric device and the power source after a predetermined time since the electric device and the power source are shut off by the blocking device.

  According to this configuration, in the event of a power failure or voltage drop including an instantaneous power failure, the power to the electrical device is temporarily shut off and then turned on again after a predetermined time. In addition to preventing operation, it is possible to restore electrical equipment without requiring maintenance personnel to visit the site.

  The present invention is also a device power supply control device, wherein the electrical device is an air conditioner, and the blocking means is a signal indicating a predetermined temperature or higher from a temperature sensor provided in a room where the air conditioner is installed. And a means for shutting off the electrical device and the power source when receiving the power.

  According to this configuration, when the air conditioner is stopped or blown due to lightning surge noise or unstable power supply operation, the room temperature rises even if the stop or blown state cannot be detected. Therefore, it is possible to shut off the power supply of the electric device using the temperature sensor in the room where the air conditioner is installed as a trigger when the temperature sensor detects a temperature equal to or higher than a predetermined temperature. According to this, even if maintenance personnel do not go to the site, the electrical equipment can be recovered.

  Further, the present invention is a device power supply control device, characterized in that the shut-off means includes means for shutting off the electrical device and the power supply when receiving a signal instructing reset from a remote monitoring control device. To do.

  According to this configuration, even if the automatic power supply shuts down, the power supply of the electric device can be shut off by remote control, so that maintenance personnel do not have to go to the site.

  In addition, the problems disclosed by the present application and the solutions thereof will be clarified by the description of the embodiments and the drawings.

  ADVANTAGE OF THE INVENTION According to this invention, when an electric equipment stops or does not operate | move normally, the said apparatus can be recovered even if it does not go to the spot.

It is a figure which shows the structure of the apparatus power supply control system. It is a figure which shows the structure of the power-on / off control circuit 4, and shows the state at the time of normal especially. It is a figure which shows the structure of the power-on / off control circuit 4, and shows the state when the power supply to the air conditioner 5 is stopped. It is a figure which shows the example of operation | movement of each relay in the case of an instantaneous power failure.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The equipment power supply control apparatus according to the embodiment of the present invention shuts off the power to the electrical equipment when a power failure including an instantaneous power failure or a voltage drop is detected, and turns on the power after a predetermined time. According to this, when a power failure or a voltage drop occurs, it is possible to prevent malfunction of the electrical device, and it is possible to recover the power supply to the electrical device without having to go to the site.

≪System configuration and overview≫
FIG. 1 is a diagram showing a configuration of the apparatus power supply control system 1. The apparatus power supply control system 1 includes a power supply apparatus 2, a noise filter 3, a power on / off control circuit (equipment power supply control apparatus) 4, and an air conditioner 5 connected in this order. The power supply device 2 supplies power to the air conditioner 5 and is, for example, an AC commercial power supply. The noise filter 3 absorbs lightning surge noise. The power on / off control circuit 4 is a circuit for controlling on / off of the power supplied from the power supply device 2 to the air conditioner 5, and is configured by a relay circuit rather than an electronic circuit in order to prevent malfunction due to lightning surge. It is preferable. The air conditioner 5 is an apparatus that performs air conditioning in the communication machine room.

  The power on / off control circuit 4 is externally connected to the temperature sensor 6 and can communicate with the remote monitoring control device 7 through a communication line. The temperature sensor 6 detects the room temperature of the communication machine room in which the air conditioner 5 is installed. If the temperature sensor 6 is equal to or higher than the set temperature, the temperature sensor 6 transmits a signal indicating that to the power supply on / off control circuit 4. The remote monitoring and control device 7 is a device that is installed in a remote place (for example, an office of a power company) in the communication machine room and remotely monitors the device power supply control system 1. Then, a control signal (hereinafter referred to as a reset signal) for resetting the air conditioner 5 is transmitted. The power on / off control circuit 4 resets the air conditioner 5 when receiving a high temperature signal from the temperature sensor 6 or a reset signal from the remote monitoring control device 7. Note that reset means that the power supply is once cut off and then turned on again after a predetermined time has elapsed.

  In FIG. 1, the power on / off control circuit 4 is shown as being external to the air conditioner 5, but the power on / off control circuit 4 may be incorporated in the control circuit of the air conditioner 5.

≪Circuit configuration and operation≫
FIG. 2 is a diagram showing a configuration of the power on / off control circuit 4, and particularly shows a normal state. The power on / off control circuit 4 includes relays Ry, Ry1 and Ry2, a timer relay TM, an AC undervoltage relay UV, and contacts SW1 to SW5. Each relay is connected in parallel with each other.

  The relay Ry1 is connected in series with the temperature sensor 6, operates when receiving a no-voltage contact signal (high temperature signal) from the temperature sensor 6, and closes the contact SW1.

  The relay Ry2 is connected in series with the remote monitoring control device 7b (hereinafter referred to as a slave station 7b), and operates when receiving a no-voltage contact signal from the slave station 7b, and closes the contact SW2. The slave station 7b supplies a non-voltage contact signal (control output signal by relay) to the relay Ry2 when it receives a reset signal from the remote monitoring control device 7a (hereinafter referred to as the master station 7a). As the remote monitoring and control device 7, the master station 7a is located on the remote office side, and one or more slave stations 7b installed near the power on / off control circuit 4 are connected via a communication line to remotely Monitor and control.

  The AC undervoltage relay UV operates when a power failure including a momentary power failure or a voltage drop (UV: Under Volt) of the power supply device 2 is detected, and closes the contact SW3.

  The timer relay TM operates when any one of the contacts SW1, SW2, and SW3 connected in parallel with each other is closed, and opens the contact SW4. The relay Ry operates when the contact SW4 is closed, and closes the contact SW5.

  The contact SW1 is normally open, but is closed when the relay Ry1 operates. The contact SW2 is normally open, but is closed when the relay Ry2 is operated. The contact SW3 is normally open, but is closed when the AC undervoltage relay UV operates. The contact SW4 is normally closed, but is opened when the timer relay TM operates. The contact SW5 is normally closed when the relay Ry is operated, but is opened when the relay Ry is not operated due to the contact SW4 being opened. The supply / stop of power supply to the air conditioner 5 is switched by closing / opening the contact SW5.

  FIG. 2 shows a normal state. In this state, none of the relays Ry1, Ry2 and the AC undervoltage relay UV operates, and all the contacts SW1, SW2, and SW3 are open. Therefore, the timer relay TM does not operate and the contact SW4 is closed. As a result, the relay Ry operates and the contact SW5 is closed, so that power is supplied to the air conditioner 5.

  FIG. 3 shows a state when the power supply to the air conditioner 5 is stopped by the power on / off control circuit 4. In FIG. 3, the AC undervoltage relay UV operates by detecting a voltage drop (including instantaneous power failure), and the contact SW3 is closed. Thereby, the timer relay TM operates and the contact SW4 is opened. As a result, the relay Ry does not operate and the contact SW5 is opened, so that the power supply to the air conditioner 5 is stopped.

≪Relay operation≫
FIG. 4 is a diagram illustrating an example of the operation of each relay in the case of an instantaneous power failure. When an instantaneous power failure occurs, the AC undervoltage relay UV detects the power failure, or if no power failure is detected, the temperature sensor 6 detects a temperature rise due to the stop of the air conditioner 5 and transmits a high temperature signal to the relay Ry1. Alternatively, if no power failure or temperature rise is detected, the slave station 7b receives a reset signal from the master station 7a and supplies a no-voltage contact signal to the relay Ry2. Therefore, when an instantaneous power failure occurs, at least one of the relays Ry1, Ry2 and the AC undervoltage relay UV operates.

  As a result, the timer relay TM operates, the relay Ry does not operate, and AC-OUT stops. In this case, even if the relays Ry1 and Ry2 and the AC undervoltage relay UV do not operate, the timer relay TM continues to operate for a predetermined time (for example, 5 to 30 minutes) and then stops. Thereby, electric power is not supplied to the air conditioner 5 for a predetermined time. This is because when a momentary power failure occurs, power transmission / cut-off / re-transmission is performed to detect the accident point. To wait. Actually, the time until power is restored when power is retransmitted after a power failure depends on the length (distance) of the distribution line between the substation and the relay station. It is possible to change arbitrarily. When timer relay TM stops, relay Ry operates and AC-OUT is recovered.

  According to the above, in the case of a power failure including an instantaneous power failure or a voltage drop, the power supply of the air conditioner 5 is shut off by the operation of the AC undervoltage relay UV or the timer relay TM, and the power is turned on after a predetermined time has elapsed. Can be prevented and maintenance personnel do not have to go to the site. In addition, when the air conditioner 5 is stopped or blown due to surge noise caused by lightning or unstable operation of the power supply device 2, the room temperature rises. Since the power supply of the air conditioner 5 can be reset when the sensor 6 detects a temperature equal to or higher than the set temperature, the maintenance staff does not have to go to the site. Even if the automatic reset is not successful, the power supply of the air conditioner 5 can be reset by remote control, so that maintenance personnel do not have to go to the site. According to this, it is possible to prevent the malfunction of the communication equipment and the deterioration of the life of the storage battery, it is possible to shorten the restoration work time of the maintenance staff, and to improve the efficiency of the work.

<< Other embodiments >>
As mentioned above, although the form for implementing this invention was demonstrated, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention. For example, in the above-described embodiment, the air conditioner 5 is the target of resetting, but any device other than the air conditioner 5 may be used as long as it is an electrical device that recovers normally by resetting.

1 Power supply control system 2 Power supply (power supply)
4 Power on / off control circuit (equipment power control device)
5 Air conditioner (electric equipment)
6 Temperature Sensor 7 Remote Monitoring and Control Device 7a Remote Monitoring and Control Device, Master Station 7b Remote Monitoring and Control Device, Slave Station Ry, Ry1, Ry2 Relay SW1 to SW4 Contact SW5 Contact (Interruption Means, Means to Disconnect, Means to Connect)
TM Timer Relay UV AC Undervoltage Relay

Claims (3)

A device power supply control device for connecting or disconnecting an electrical device and its power source,
A shut-off means for shutting off the electric device and the power source when a power failure or voltage drop of the power source is detected;
Means for connecting the electrical device and the power source after a predetermined time since the electrical device and the power source are shut off by the shut-off means;
A device power supply control device comprising: The apparatus power supply control device according to claim 1,
The electrical device is an air conditioner,
The blocking means is
A device power supply control device comprising: means for cutting off the electric device and the power supply when receiving a signal indicating a predetermined temperature or higher from a temperature sensor provided in a room where the air conditioner is installed. The apparatus power supply control device according to claim 1 or 2,
The blocking means is
A device power supply control device comprising means for shutting off the electric device and the power supply when receiving a reset instruction signal from a remote monitoring control device.

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