JP2012251702A - Ventilator - Google Patents

Abstract

An object of the present invention is to continue operation with stored power in a power supply interruption in a DC power distribution system.
Power supply detection means for detecting an input voltage, a backup power supply for storing power from the system, a diode for preventing discharge of the stored power to a system of a DC distribution system, and the backup power supply Discharge opening / closing means 5 capable of discharging electric power to the system, discharge suppression opening / closing means 6 having a resistance value for suppressing current for discharging the electric power of the backup power supply 3 to the system, and control means 7a. Thus, the control means 7a controls the opening / closing of the discharge opening / closing means 5 and the discharge suppression opening / closing means 6 based on the voltage of the power supply detection means 2, thereby discharging the power of the backup power supply 3 to the system of the DC distribution system. Even when the power supply is cut off, a ventilation device that continues to drive the terminal equipment of the same system can be obtained.
[Selection] Figure 1

Description

  The present invention relates to a ventilator that can be operated by supplying DC power.

  Conventionally, ventilation equipment for ordinary houses was obliged to install ventilation equipment for ordinary houses in 2003 due to the enforcement of the revised Building Standards Law for measures against sick houses.

  For this reason, each room in a general house must be constantly ventilated with mechanical ventilation equipment.

  And in recent years, in order to further save energy, each device does not convert from a commercial power supply to a DC voltage, but is directly driven by a DC power supply, so that a DC power distribution system for reducing conversion loss is also installed in ordinary houses. Proposed.

  Conventionally, this type of DC power distribution system has been proposed for LED lighting, security systems, ventilation fans, etc. that are directly driven by the supply of DC voltage by a DC power distribution system that converts a commercial power supply or solar power generation device into a predetermined DC voltage. Is known (see, for example, Patent Document 1).

  Hereinafter, the outline of the system having the ventilation device will be described with reference to FIG.

  As shown in FIG. 9, the DC power distribution system 101 includes a converter 104a that converts the commercial power source 102 into a predetermined DC voltage, a converter 104b that converts the photovoltaic power generator 103 into a predetermined DC voltage, and a backup that stores the DC voltage. There are device disconnecting means 106a, 106b, 106c for supplying and shutting off DC power to the power source 105 and DC drive devices of each system. The converters 104a, 104b, the backup power source 105, and the device disconnecting means 106a, 106b. , 106c.

  Each system of the device disconnecting means is classified and connected to, for example, a security system for the device disconnecting means 106a, an LED illumination for the device disconnecting means 106b, and a ventilation fan for the device disconnecting means 106c. By doing so, the priority of each system is set.

  In addition, there is a DC power distribution system of this type in which power is distributed and stored in each terminal device (see, for example, Patent Document 2).

  The system will be described below with reference to FIG.

  As shown in FIG. 10, backflow prevention diodes 110a and 110b and protective fuses 111a and 111b are connected in series to the wiring system from the DC distribution system 108 to the terminals 109a and 109b, respectively. Capacitors 112a and 112b for storing electric power are provided.

  If a failure occurs in the terminal 109b and the protective fuse 111b is blown, the entire system is not affected.

JP 2009-159655 A JP 2007-325413 A

  In such a system having a conventional ventilator, the DC power distribution system is provided with a backup power source for storing DC power, and in the event of a power failure, the priority is given to the power supply system such as security as the priority for supplying this backup power source. In the event of an abnormality, the power supply system of other terminals is shut off, and consideration is given so that this security terminal can operate for a specified time.

  For this reason, the ventilation device fed from the DC power distribution system has a low priority for power feeding by the backup power source, and in the event of a commercial power failure, the power feeding is cut off by the device disconnection means in order from the DC driving device with the lowest priority. There was a problem that the frequency of interruption was high.

  In addition, when a short-circuit fault occurs in the terminal equipment of the same system, the power stored in each terminal is blown away from the system by the protective fuse, but the power of the normal terminal equipment is protected by a diode and is sent to the system side. Therefore, there is a problem that the power stored in each terminal cannot be shared by the same system due to a trouble on the power source side.

  Therefore, the present invention solves the above-described conventional problem, and the power stored in the terminal is shared even when the power supply to the system with a low priority of power supply is cut off due to a decrease in power supply of the DC distribution system. It aims at providing the ventilation apparatus which can be shared by a system | strain and can continue the drive of a terminal device.

In order to achieve this object, the present invention provides a ventilation fan motor driven by a DC power supply, a power supply detection means for detecting a plurality of threshold voltages from the input voltage value of the DC power supply, and a DC distribution system. A backup power source for storing the power distributed by the DC from the grid;
A diode for preventing backflow to prevent the power stored in the backup power source from being discharged into the system of the DC power distribution system, and the diode connected in parallel with the diode, can discharge the power of the backup power source to the system of the DC power distribution system. A discharge opening / closing means, a discharge suppression opening / closing means connected in parallel with the discharge opening / closing means and having a resistance value for suppressing a current for discharging the power of the backup power source to a system of a DC power distribution system; It is a control means for controlling the discharge opening / closing means and the discharge suppression opening / closing means at a predetermined time based on the information of the stop and the power supply detection means, thereby achieving the intended purpose.

  Further, the present invention is a power thermistor which is a resistance element having a positive temperature coefficient of resistance in series with the discharge path to the backup power supply system.

  According to the present invention, there is provided a discharge current detecting means for detecting a current value of at least one threshold value as a discharge current value of the discharge path of the backup power supply, and the control means detects the overdischarge current based on the current value of the discharge current detecting means. When it is determined that the discharge current value of the backup power source is a discharge current suppressing means for suppressing at least one threshold current.

  Further, the present invention is a human sensor that can detect the presence of a person in the room.

  Further, the present invention is a charge start means for controlling the start of charging of the backup power source.

  In the present invention, the discharge voltage of the backup power supply is backup voltage detection means for detecting at least one threshold voltage.

  In the present invention, the setting contractor can change the setting at the time of construction, and can set the setting SW that can temporarily stop the ventilation operation until power restoration and prioritize only the discharge of the power stored in the backup power source.

  In addition, the present invention provides a notification means using one or both of an LED and a buzzer for notifying the user.

  According to the present invention, the fan motor for ventilation driven by a DC power supply, the power supply detection means for detecting the input voltage value of the DC power supply with a plurality of threshold voltages, and the power distributed from the system of the DC distribution system. A backup power supply for storing, a backflow prevention diode for preventing discharge of the power stored in the backup power supply to the system of the DC distribution system, and connected in parallel with the diode, and the power of the backup power supply to the system of the DC distribution system A discharge opening / closing means capable of discharging, a discharge suppression opening / closing means connected in parallel with the discharge opening / closing means, and having a resistance value for suppressing a current discharging the power of the backup power source to a system of a DC power distribution system; The discharge opening / closing means and the discharge suppression opening / closing means are operated for a predetermined time according to the information of the operation / stop of the fan motor and the power supply detection means. Since the control means is configured to control the power supply, the control means controls the opening / closing of the discharge opening / closing means and the discharge suppression opening / closing means based on the threshold voltage of the power supply detection means, so that the power of the backup power supply can be dc distributed. Since the system system will be temporarily discharged, even if the power supply capacity of the DC distribution system is reduced or the power supply to the system is interrupted due to priority, it is possible to continue driving the terminal equipment of the same system. The effect that it is possible can be obtained.

The block diagram which shows the ventilation apparatus of Embodiment 1 of this invention The block diagram which shows the ventilation apparatus of Embodiment 2 of this invention The block diagram which shows the ventilation apparatus of Embodiment 3 of this invention The block diagram which shows the ventilation apparatus of Embodiment 4 of this invention Block diagram showing a ventilator according to a fifth embodiment of the present invention. The block diagram which shows the ventilation apparatus of Embodiment 6 of this invention Block diagram showing a ventilator according to a seventh embodiment of the present invention Block diagram showing a ventilator according to an eighth embodiment of the present invention. Block diagram showing a conventional ventilator Block diagram showing a conventional ventilator

  According to a first aspect of the present invention, there is provided a ventilating apparatus comprising: a ventilation fan motor driven by a DC power supply; power supply detection means for detecting a plurality of threshold voltages of the input voltage value of the DC power supply; and a system of a DC distribution system. A backup power source for storing the power distributed by the DC power supply, a diode for preventing a backflow to prevent the power stored in the backup power source from being discharged to the system of the DC power distribution system, and connected in parallel with the diode, Discharge switching means capable of discharging to the system of the DC distribution system, and a discharge connected to the discharge switching means in parallel and having a resistance value for suppressing a current for discharging the power of the backup power source to the system of the DC distribution system The discharge opening / closing means and the discharge suppression opening / closing are determined according to the information of the suppression opening / closing means, the operation / stop of the fan motor, and the power supply detection means. It has a structure that the control means for controlling the means by a predetermined time.

  As a result, the control means can control the opening / closing of the discharge opening / closing means and the discharge suppression opening / closing means according to the threshold voltage of the power supply detection means, thereby discharging the power of the backup power source to the system of the DC distribution system.

  As a result, in the ventilation device installed in each room by the building foundation method, by providing the backup power source in each ventilation device, the ventilation device supplies temporary discharge to the same system, so that the direct current distribution system Even when power supply to a system is interrupted due to a decrease in power supply capability or priority, driving of terminal devices in the same system can be continued.

  Further, a power thermistor which is a resistance element having a positive temperature coefficient in resistance in series with the discharge path to the backup power supply system may be used.

  Thereby, by providing the power thermistor in the discharge path from the backup power source to the system of the DC power distribution system, when a short circuit failure occurs in equipment or wiring connected to the system of the DC power distribution system, the control means If a rapid discharge current flows before the backup power source is disconnected from the system of the DC distribution system by the discharge switching means, the power thermistor itself generates heat and suppresses the discharge current by increasing its resistance value. be able to.

  Thereby, when a short circuit failure of the system of the DC distribution system occurs, it is possible to prevent a rapid discharge current from flowing until the backup power source is disconnected from the system of the DC distribution system by the discharge switching means. Since the rated current of the contact of the discharge switching means can be lowered and the contact life can be extended, there is an effect that an inexpensive contact can be adopted.

  A discharge current detecting means for detecting a current value of at least one threshold value as a discharge current value of the discharge path of the backup power supply; and when the control means determines an overdischarge current based on a current value of the discharge current detecting means. The discharge current value of the backup power supply may be configured as a discharge current suppressing unit that suppresses at least one threshold current.

  Thereby, the control means suppresses the discharge current of the backup power supply by the discharge current suppressing means when the discharge current detecting means detects a predetermined current value or more.

  Thereafter, when the discharge current detection means detects a predetermined current value or less, the control means releases the suppression of the discharge current of the discharge current suppression means.

  Thereby, by suppressing the discharge current of the backup power supply by the discharge current suppressing means, it is possible to reduce the life deterioration of the backup power supply due to the overdischarge current.

  Moreover, you may make it the structure which provided the human sensitive sensor which can detect a person's presence in a room.

  As a result, the control means detects the person in the room by the human sensor when the power detection means detects a voltage value below a predetermined value and the backup power supply is discharged to the system of the DC distribution system by the discharge opening / closing means. If it is determined that the fan is absent, the fan motor for ventilation is stopped.

  As a result, when the power supply capability of the DC power distribution system is reduced, the operation of other terminals in the same system can be lengthened by stopping the ventilation operation and temporarily reducing the power consumption when there are no people in the room. There is an effect that can be.

  Further, a configuration may be provided in which charging start means for starting the charging of the backup power supply is provided.

  As a result, when the power supply is interrupted for a long time and the amount of charge of the backup power supply is consumed, the control means detects that the power supply detection means returns to a predetermined voltage value, and the DC distribution system is in a normal power supply state. By determining that the discharge opening / closing means is closed, the fan motor is operated without the voltage drop of the diode with respect to the voltage from the DC power distribution system without passing through the diode.

  Then, the control means causes the charge start means to start charging the backup power supply after a predetermined time has elapsed.

  This is because consumption increases due to simultaneous operation of terminal devices connected to the same system when the power distribution of the DC power distribution system is restored. Therefore, when charging of the backup power supply is started immediately, the current further increases.

  Therefore, by delaying charging immediately after the DC power distribution system is restored, it is possible to reduce the load on the DC power distribution system and to prevent the increase in power source capacity and cost.

  Further, a backup voltage detecting means for detecting at least one threshold voltage of the discharge voltage of the backup power supply may be provided.

  Thus, at the start of operation, the control means causes the discharge opening / closing means and the discharge suppression opening / closing means to be in an open state, that is, only the diode is connected from the DC power distribution system to the fan motor.

  Then, by comparing the supply voltage of the DC power distribution system by the power supply detection means and the discharge voltage of the backup power supply by the backup voltage detection means, it is determined which voltage is higher.

  When the discharge voltage of the backup power supply is higher and the fan motor has a predetermined start-up guarantee voltage, the fan motor is started with the discharge opening / closing means and the discharge suppression opening / closing means open.

  In general, a fan motor is instantaneous at the time of start-up, but current consumption tends to increase as compared with a normal time.

  Thereby, there exists an effect that the load of a DC power distribution system can be reduced by effectively using the electric power stored in the ventilator.

  In addition, the construction contractor may change the setting at the time of construction, and may be configured to have a setting SW that can temporarily stop the ventilation operation until power restoration and prioritize only the discharge of the power stored in the backup power source. .

  As a result, when the control means determines that the power supply detection means cuts off the power supply of the DC power distribution system by the setting SW, the contractor temporarily stops the ventilation operation until power is restored, and the backup power supply The stored power is used only for discharging.

  As a result, even if the contractor connects the ventilator to a wiring system that has a high priority in each wiring system, it does not waste use and supplies the stored power to the system, thereby restricting the wiring system in each room. The ventilation device can be installed without receiving it, and the workability can be improved.

  Moreover, you may make it the structure which provided the alerting | reporting means by one or both of LED or a buzzer for notifying a user.

  Thereby, when it is determined that the power stored in the backup power source cannot be discharged to the system of the DC power distribution system when the control means has a short circuit failure of the terminal device or wiring connected to the system of the DC power distribution system. That is, the discharge opening / closing means and the discharge suppression opening / closing means are opened, and the notification means notifies the user.

  This is because the maintenance of terminal equipment and wiring is not frequently performed in the DC power distribution system of ordinary houses, and the user is less likely to notice trouble.

  As a result, it is possible to quickly inform the user that a failure has occurred in the system and to improve service maintenance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, in the present invention, a ventilator driven by a DC power source supplied from a commercial power source for energy saving or a DC power distribution system for converting to a predetermined DC voltage from a photovoltaic power generator is driven by a DC power source. A fan motor 1 for ventilation;
Power supply detection means 2 for detecting a plurality of threshold voltages from the input voltage value of the DC power supply;
A backup power source 3 for storing the power distributed from the system of the DC distribution system;
A diode 4 for preventing a backflow so as not to discharge the power stored in the backup power source 3 to the system of the DC distribution system;
A discharge switching means 5 connected in parallel with the diode 4 and capable of discharging the power of the backup power supply 3 to a system of a DC distribution system;
A discharge suppression switching means 6 connected in parallel with the discharge switching means 5 and having a resistance value for suppressing a current for discharging the power of the backup power source 3 to a system of a DC power distribution system;
A control means 7a is provided for controlling the discharge opening / closing means 5 and the discharge suppression opening / closing means 6 at a predetermined time based on the information of the operation / stop of the fan motor 1 and the power source detection means 2.

  As the plurality of threshold voltages of the power source detection means 2, the first threshold voltage value is the lower limit voltage value of the power source voltage tolerance of the DC distribution system, and the second threshold voltage value is the lower limit of the nominal operating voltage of the ventilator. The voltage value, the third threshold voltage value are the intermediate voltage values of the second threshold voltage value and the fourth threshold voltage value, and the fourth threshold voltage value is the lower limit voltage value of the actual operating voltage of the ventilator.

  In the above configuration, normally, the backup power supply 3 is charged without passing through the diode 4 by closing the discharge switching means 5 from the DC distribution system, and the fan motor 1 is also charged with the voltage from the DC distribution system. On the other hand, the diode 4 is operated without a voltage drop.

  And the interruption | blocking of the electric power supply from a DC distribution system can be divided roughly into the following two cases.

  The first case is when the power supply of a DC device system with a low priority of power supply is stopped when the supply power of the DC power distribution system is insufficient.

  In this case, when the power supply detection means 2 detects the first threshold voltage value or less, the control means 7a opens the discharge opening / closing means 5 and the discharge suppression opening / closing means 6 to open the backup power supply 3 Do not discharge the stored power to the DC distribution system.

  Then, the control means 7a closes the discharge opening / closing means 5 and turns off the backup power supply 3 when the power supply detection means 2 does not detect a lower threshold voltage value or lower after a predetermined time. Discharge the stored power to the DC distribution system.

  Further, when the power supply detection means 2 detects the second threshold voltage value or less after a predetermined time, the control means 7a closes only the discharge suppression opening / closing means 6 and supplies the power stored in the backup power supply 3. Discharge to the DC distribution system.

  Thereafter, the control means 7a closes the discharge opening / closing means 5 and stores the backup power supply 3 when the power supply detection means 2 does not detect the third threshold voltage value lower than the second threshold voltage. The discharged power is discharged to the DC distribution system.

  The second case of shutting off the power supply from the DC distribution system is a case where a short circuit failure occurs in the system of the DC distribution system, and the DC distribution system stops supplying power to the system where the short circuit failure occurs.

  In this case, when the power supply detection means 2 detects the first threshold voltage value or less, the control means 7a similarly opens the discharge open / close means 5 and the discharge suppression open / close means 6 to thereby open the backup power supply. The electric power stored in 3 is not discharged to the system of the DC distribution system.

  Thereafter, after a predetermined time, the control means 7a closes only the discharge suppression opening / closing means 6 when the power supply detection means 2 detects the third threshold voltage value or less.

  Furthermore, when the power source detection means 2 detects a voltage lower than the fourth threshold voltage value that is lower than the third threshold voltage, it is determined that the same system of the DC power distribution system is in an abnormal state such as a short circuit, and the backup power source 3 The discharge opening / closing means 5 and the discharge suppression opening / closing means 6 are opened so as not to discharge the stored power to the system of the DC distribution system.

  Accordingly, in the ventilation device installed in each room by the building foundation method, the backup power source 3 is provided in each ventilation device, so that the ventilation device supplies temporary discharge to the same system, so that the direct current distribution system Even when the power supply to the system is interrupted due to a decrease in power supply capability or priority, the terminal device of the same system can be continuously driven.

  In addition, in the case of a short circuit failure in the system, the power stored in the ventilation device is not discharged to the system, so that the power stored in vain can be prevented from being consumed.

(Embodiment 2)
In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, the ventilator driven by the DC power supply of the present invention includes a power thermistor 8 that is a resistance element having a positive temperature coefficient in series with the discharge path to the system of the backup power supply 3. The configuration is provided.

  In the above configuration, when a current flows through the power thermistor 8, there is a characteristic that the temperature of the resistor element rises and the resistance value increases, and the current is suppressed. When the power thermistor 8 is provided in the discharge path from the backup power source 3 to the system of the DC power distribution system, when a short circuit failure occurs in equipment or wiring connected to the system of the DC power distribution system, the control means 7a If a rapid discharge current flows until the backup power source 3 is disconnected from the system of the DC power distribution system by the discharge opening / closing means 5, the power thermistor 8 itself generates heat, thereby increasing its own resistance value. Can be suppressed.

  As a result, when a short circuit failure occurs in the system of the DC distribution system, it is possible to prevent a rapid discharge current from flowing until the backup power source 3 is disconnected from the system of the DC distribution system by the discharge switching means 5. Since the rated current of the contact of the discharge switching means 5 can be lowered and the contact life can be extended, an inexpensive contact can be employed.

(Embodiment 3)
In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 3, the ventilator driven by the DC power supply of the present invention comprises a discharge current detection means 9 for detecting a current value of at least one threshold value of a discharge current value of the discharge path of the backup power supply 3;
Discharge current suppression means 10 is provided that suppresses the discharge current value of the backup power supply 3 to at least one threshold current when the control means 7b determines that the discharge current detection means 9 is an overdischarge current based on the current value of the discharge current detection means 9. Have a configuration.

  In the above configuration, the control means 7b suppresses the discharge current of the backup power source 3 by the discharge current suppressing means 10 when the discharge current detecting means 9 detects a predetermined current value or more.

Thereafter, the control means 7b detects that the discharge current detection means 9 is below a predetermined current value,
The suppression of the discharge current of the discharge current suppression means 10 is released.

  Thereby, by suppressing the discharge current of the backup power supply 3 by the discharge current suppressing means 10, it is possible to reduce the life deterioration of the backup power supply 3 due to the overdischarge current.

(Embodiment 4)
In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the ventilator driven by the DC power supply of the present invention has a configuration in which a human sensor 11 that can detect the presence of a person in the room is provided.

  In the above-described configuration, the control means 7c detects the human sense when the power supply detection means 2 detects a predetermined voltage value or less and discharges the backup power supply 3 to the system of the DC distribution system by the discharge opening / closing means 5. If it is determined by the sensor 11 that there is no person in the room, the operation of the fan motor for ventilation is stopped.

  As a result, when the power supply capability of the DC power distribution system is reduced, the operation of other terminals in the same system can be lengthened by stopping the ventilation operation and temporarily reducing the power consumption when there are no people in the room. Can do.

(Embodiment 5)
In FIG. 5, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the ventilator driven by the direct current power supply of the present invention has a configuration provided with charging start means 12 for starting the charging of the backup power supply 3.

  In the above configuration, when the power supply is cut off for a long time and the charge amount of the backup power supply 3 is consumed, the control means 7d detects that the power supply detection means 2 detects the return of the voltage to a predetermined voltage value. By determining that the power supply state is normal and closing the discharge switching means 5, the fan motor 1 does not go through the diode 4 and the voltage of the diode 4 does not drop with respect to the voltage from the DC power distribution system. Driven.

  Then, the control means 7d causes the charging start means 12 to start charging the backup power supply 3 after a predetermined time has elapsed.

  This is because consumption increases due to simultaneous operation of terminal devices connected to the same system when power supply to the DC power distribution system is restored. Therefore, when charging of the backup power supply 3 is started immediately, the current further increases.

  Therefore, by delaying charging immediately after the DC power distribution system is restored, the load on the DC power distribution system can be reduced, and the power capacity and cost can be prevented from increasing.

(Embodiment 6)
In FIG. 6, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 6, the ventilator driven by the DC power source of the present invention is
A backup voltage detecting means 13 for detecting at least one threshold voltage of the discharge voltage of the backup power supply 3 is provided.

  In the above configuration, at the start of operation, the control means 7e makes the discharge opening / closing means 5 and the discharge suppression opening / closing means 6 open, that is, only the diode 4 is connected to the fan motor 1 from the DC power distribution system.

  Then, by comparing the supply voltage of the DC power distribution system by the power supply detection means 2 and the discharge voltage of the backup power supply 3 by the backup voltage detection means 13, it is determined which voltage is higher.

  When the discharge voltage of the backup power supply 3 is higher and the fan motor 1 has a predetermined start-up guarantee voltage, the fan motor 1 is started with the discharge opening / closing means 5 and the discharge suppression opening / closing means 6 open.

  In general, a fan motor is instantaneous at the time of start-up, but current consumption tends to increase as compared with a normal time.

  Thereby, the load of the DC power distribution system can be reduced by effectively using the electric power stored in the ventilation device.

(Embodiment 7)
In FIG. 7, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 7, the ventilator driven by the DC power source of the present invention is
It has a configuration provided with a setting SW 14 that can change the setting at the time of construction, temporarily stop the ventilation operation until power recovery, and give priority to only the discharge of the power stored in the backup power source 3.

  In the above configuration, when the control means 7f determines that the power supply detection means 2 interrupts the power supply of the DC power distribution system by the setting SW 14, the ventilation operation is temporarily stopped until the power is restored. The power stored in the backup power source 3 is used only for discharging.

  That is, the fan motor 1 is brought into a stopped state.

  As a result, even if the contractor connects the ventilator to a wiring system that has a high priority in each wiring system, it does not waste use and supplies the stored power to the system, thereby restricting the wiring system in each room. Ventilation equipment can be installed without receiving, and workability can be improved.

(Embodiment 8)
In FIG. 8, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 8, the ventilator driven by the DC power source of the present invention is
It has the structure which provided the alerting | reporting means 15 by one or both of LED or a buzzer for notifying a user.

  In the above configuration, when the short circuit failure of the terminal device or wiring connected to the system of the DC power distribution system occurs in the control means 7g, the power stored in the backup power source 3 cannot be discharged to the system of the DC power distribution system. When the determination is made, that is, the discharge opening / closing means 5 and the discharge suppression opening / closing means 6 are opened, and the notification means 15 notifies the user.

  This is because the maintenance of terminal equipment and wiring is not frequently performed in the DC power distribution system of ordinary houses, and the user is less likely to notice trouble.

  As a result, it is possible to quickly inform the user that a failure has occurred in the system and improve service maintenance.

  In the embodiment, the contact switch is used for the discharge opening / closing means 5 or the discharge suppression opening / closing means 6. However, the switch may be replaced with a semiconductor switch, and there is no difference in the operational effect.

  In the first embodiment, four threshold voltages are used as the plurality of threshold voltages of the power source detection unit 2, but other than four may be used depending on the charging and discharging characteristics of the backup power source 3. There is no difference in function and effect.

  The ventilator for a DC power distribution system according to the present invention is designed to reduce the power conversion loss of DC power generated and stored by solar power generation equipment installed in a house in recent years in order to promote further energy saving in the home. In addition, a system in which a DC voltage is directly supplied to a device used in the home, for example, an LED lighting or a ventilation fan, to be driven has been studied.

  Therefore, it is useful for improving the stability of the power supply in the entire system by individually storing the electric power and reducing the power consumption at the time of starting each of the DC-driven devices.

DESCRIPTION OF SYMBOLS 1 Fan motor 2 Power supply detection means 3 Backup power supply 4 Diode 5 Discharge opening / closing means 6 Discharge suppression opening / closing means 7a Control means 7b Control means 7c Control means 7d Control means 7e Control means 7f Control means 7g Control means 8 Power thermistor 9 Discharge current detection means DESCRIPTION OF SYMBOLS 10 Discharge current suppression means 11 Human sensor 12 Charging start means 13 Backup voltage detection means 14 Setting SW
15 Notification means

Claims (8)

A fan motor for ventilation driven by a DC power supply, a power supply detection means for detecting a voltage of a plurality of threshold values for the input voltage value of the DC power supply, a backup power supply for storing the power distributed by the DC from the system of the DC distribution system, A diode for preventing backflow to prevent the power stored in the backup power source from being discharged to the system of the DC power distribution system, and a discharge connected to the diode in parallel to discharge the power of the backup power source to the system of the DC power distribution system Opening / closing means, discharge suppression opening / closing means connected in parallel with the discharge opening / closing means, and having a resistance value for suppressing a current for discharging the power of the backup power source to the system of the DC power distribution system, and operation / stop of the fan motor The control of controlling the discharge opening / closing means and the discharge suppression opening / closing means at a predetermined time based on the information of the power source detection means. Ventilation device provided with means. The ventilator according to claim 1, further comprising a power thermistor that is a resistance element having a positive temperature coefficient of resistance in series with a discharge path to the backup power supply system. A discharge current detecting means for detecting a current value of at least one threshold as a discharge current value of a discharge path of the backup power supply; and when the control means determines an overdischarge current based on a current value of the discharge current detecting means, The ventilator according to claim 1 or 2, further comprising: a discharge current suppressing unit that suppresses at least one threshold current of a discharge current value of the backup power source. The ventilation apparatus according to any one of claims 1 to 3, further comprising a human sensor capable of detecting the presence of a person in the room. The ventilator according to any one of claims 1 to 4, further comprising charging start means for starting charging of the backup power source. The ventilator according to any one of claims 1 to 5, further comprising backup voltage detection means for detecting at least one threshold voltage of the discharge voltage of the backup power supply. The present invention is provided with a setting SW that can be changed by a contractor at the time of construction, and can temporarily stop the ventilation operation until power recovery, and can prioritize only the discharge of the power stored in the backup power source. The ventilation apparatus as described in any one of 6. The ventilator according to any one of claims 1 to 7, further comprising a notification means using one or both of an LED and a buzzer for notifying a user.

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