JP2005282877A - Ventilating device and photovoltaic power system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar battery type ventilating device not storing enormous quantity of data relating to sunset and sunrise, dispensing with cumbersome input of data such as date and latitude and longitude of installation place by an installation personnel, and further not increasing a circuit such as a humidity sensor in case of rainy and cloudy weather of high humidity, in the ventilating device capable of coping with the stop control in low intensity of illumination such as nighttime stop and sudden raining, and being started and stopped at a desired time. <P>SOLUTION: This ventilating device applying the solar battery as a power source, has a function for measuring the intensity of illumination by measuring and converting output voltage, short-circuit current and the like, monitors the illumination data of 24 hours by further mounting a backup power source, the approximate timing of sunset and sunrise is estimated on the basis of the comparison of numerical values of the acquired illumination data, to be applied as a base time, and the time is indicated by the difference from the base time to perform the control on the basis of the time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ventilator that forcibly ventilates a ceiling, a floor or the like of a building using a solar cell, and a solar power generation system using the ventilator of the present invention.

  Conventionally, ventilation equipment that forcibly flows air in or out of the attic or under the floor of a house and ventilating the attic or under the floor prevents corrosion of building materials and mold growth, or lowers the temperature. Thus, the cooling performance of the cooling device is enhanced.

  About the drive power of these ventilators, it is supplied with alternating current or direct-current power using commercial power, a solar cell, etc.

  However, it is not always necessary to perform ventilation, and the timing is required.

  That is, when it is ventilated in rainy weather when the humidity is high, or at night when the temperature is high and the humidity is high, the humidity in the attic and under the floor increases, which has an adverse effect.

  Therefore, in order to solve such a problem, there is a technique in which a sensor circuit is provided in the ventilator, and humidity is detected to stop the operation of the ventilator.

  On the other hand, there is also a technology that uses a solar cell for operation of this ventilation device and is driven by electric energy converted from sunlight.

  When solar cells are used in this way, when the humidity is high or when the light illuminance is low, when the ventilation is stopped, the light illuminance is measured by the output voltage or short-circuit current of the solar cell, and this is defined by the circuit. Compared with the set voltage, the ventilator is started and stopped depending on whether or not it is above a certain illuminance.

  As described above, when the output voltage of the solar cell is used, the voltage detector detects whether the output voltage of the solar voltage has exceeded the set voltage, and if the output voltage of the solar cell exceeds the set voltage, Power is supplied to the motor, and power supply to the fan motor is stopped if the set voltage is not met.

  However, according to this configuration, when the illumination is low, the ventilator frequently repeats operation and stoppage, which causes a problem that a magnetic sound is generated due to repeated on / off of the fan motor.

  In order to solve this problem, there is a technique of adding illuminance measurement by a short-circuit current of a solar cell as a determination element.

  According to this technology, power is supplied to the fan motor when the illuminance becomes a set voltage or higher when a current corresponding to the start current of the fan motor flows through a resistor connected in parallel to the solar cell. I am doing so. The power supply to the fan motor is continued until the output voltage of the solar cell becomes a predetermined voltage or less from the set voltage, and the power supply to the resistor is stopped while the power is supplied to the fan motor.

  Therefore, the fan motor is not repeatedly turned on and off at low illuminance, thereby preventing magnetic noise.

  In this way, no magnetic sound is generated, but on the other hand, there is also a problem that the circuit life is shortened even in this starting and stopping method. That is, when the output voltage of the solar cell is lower than the set voltage, a current is constantly flowing through the resistor, and therefore, the temperature in the circuit rises, causing stress in the circuit.

  As a solution to this problem, there is a ventilation device to which a delay timer circuit is added. This device J will be described with reference to FIG.

  According to the ventilation device J1 shown in the figure, the solar cell 11, the resistors 44 and 45 for voltage division, the constant voltage circuit 41, the voltage determination circuit 42, the fan motor 12, and the transistor for driving the fan motor 12 are used. 7 and a delay timer circuit 43 for controlling the drive signal of the transistor 7.

  The output voltage of the solar cell 11 is divided by resistors 44 and 45, sent to the voltage determination circuit 42, and compared with a reference voltage created by the constant voltage circuit 41.

  The voltage determination circuit 42 is started and stopped based on a preset voltage (which often uses the reference voltage of the constant voltage circuit 41). However, the voltage determination circuit 42 is frequently used when the voltages compared by the voltage determination circuit 42 are close. Therefore, the delay timer circuit 43 is provided to suppress the frequent start and stop so that the start or stop state is maintained for a certain period of time.

  In addition, at low illuminance, current does not always flow through a resistor that can withstand the same loss as the fan motor output, so there is no inconvenience that the temperature in the circuit rises and shortens the circuit life, The cost can be reduced and the circuit can be easily downsized.

  Furthermore, a diode bridge 47 is added to the input section to which the solar cell 11 is connected, and a technique for providing a ventilation device that can be connected without considering the polarity of the solar cell 11 has been proposed (for example, Patent Documents). 1).

  On the other hand, in the driving method using a commercial power source, since stable power supply can be obtained, there is no concern about the chattering phenomenon of starting and stopping as described above, but there is a problem that day and night cannot be determined. .

  Therefore, we start and stop at any time set with a clock function, but with such a ventilator, the length of day and night varies depending on the season and the latitude of the installation location, Since the sunset time changes, it is necessary to change the setting of the start and stop times for each season in order to maximize the ventilation time, which makes it difficult to change the time setting.

  In addition, when the set time is constant, the dry air during the daytime cannot be used effectively in the summer when the sunshine hours are long. And in winter when the sunshine hours are short, there is a problem that outside air with morning and evening humidity is put indoors.

  Therefore, as a method for improving such problems, there is a ventilator to which a solar timer is added. This device J2 will be described with reference to FIG.

  According to the ventilation device J2 shown in the figure, it comprises a commercial power supply 51, a fan motor 12, and a fan control circuit 8.

  The electric power of the commercial power supply 51 is converted into a direct current by an AC / DC converter 52 in the fan control circuit 8 and supplied to the fan motor 12 through a switch 54 that switches on and off. The solar timer unit 55 controls the switch 54.

  The solar timer unit 55 mainly includes a clock unit 56 that counts the current time and hour, a calendar unit 57 that counts the date advance signal of the clock unit 56 and counts and stores the current date, and a Japanese standard time reference point. The time storage unit 58 stores the sunrise / sunset times for each month and day in Akashi city in advance, and the setting unit 59 can set various parameters necessary for calculating the sunrise / sunset times from the outside.

  The elements set from the setting unit 59 include the district where the ventilator is installed, the daylight saving time, the sunset time, and the like. Since the sunrise and sunset times vary depending on the latitude and longitude, the area settings are divided into 10 areas such as Okinawa, Kyushu, Tohoku, and Hokkaido, for calculating the standard sunrise and sunset times in each area. For example, a district setting number is set and stored in the district setting storage unit 60. The district correction data storage unit 61 stores the deviation of sunrise and sunset times from Akashi City, which is standard time, in correspondence with the district number stored in the district setting storage unit 60. The values of this deviation are stored for 10 districts for each region.

  The daylight saving time is not effective when the fan motor 12 is operated at the regular daylight time, and air that has not completely dried enters the floor or ceiling. Since the operation sound may be heard during sleep and it may be harsh, the time for delaying the start-up time of the ventilation fan 12 from the regular daylight time is indicated. The set daylight time setting time is stored in the setting setting storage unit 62.

  Similarly, the sunset time is the time to stop the fan motor 12 earlier than the regular sunset time. The set early sunset time is stored in the stop setting storage unit 63.

  The time calculation unit 64 calculates the sunrise / sunset times of the day of the solar timer 55 based on the values of the setting units, the storage units, and the calendar unit 57. To calculate the daylight / sunset time of the day, first, based on the month / day data in the calendar section 57, the standard daylight / sunset data of the reference point corresponding to this month / day is used as the standard daylight / day. It is read from the dead time storage unit 58.

  Next, the reference point of the district set in the district setting storage unit 60 and the correction data are read from the district correction data storage unit 61. Further, the setting value of the setting setting storage unit 62 and the setting value of the early sunset time setting storage unit 63 are read and the calculation is executed.

  The comparison unit 65 compares the calculated sunrise time and sunset time with the clock time of the clock unit 56, and activates the fan motor 12 when the sunrise time ≦ the measured time ≦ the sunset time. When timekeeping time <sunrise time or sunset time <timekeeping time, a fan motor stop signal is output, and the contact drive unit 66 starts and stops the fan motor by the switch 54.

By setting the district, month, day, sunset time, sunset time, and early sunset time, the daytime, the sunset time, and the sunset time, including the sunset time, By calculating the sunset time and controlling the start and stop of the fan motor 12 based on this, there is no need to change the on / off time according to geography or season, and the daylight and sunset times throughout the year. A technique for obtaining a ventilation effect linked to the above has been devised (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 11-63595 JP 2001-141270 A

  However, in the case where a solar cell is used as a power source, there is a problem in that the user cannot start and stop at a desired light illuminance because the user starts and stops with a prescribed reference voltage corresponding to the light illuminance.

  In addition, since the illuminance standard is started and stopped, and the illuminance at any time changes depending on the season, the start and stop time changes, for example, starting from the early morning in the summer, and disturbing sleeping There was also a problem.

  Furthermore, even when using the solar timer, when starting and stopping on the basis of the illuminance standard, it is necessary to memorize a huge amount of data regarding sunset and sunrise that varies depending on the season and installation location. Data related to the date and time and the latitude and longitude of the installation location must be input, which is a cumbersome operation.

  In addition, when it is raining or cloudy with increasing humidity, it must be sensed through a humidity sensor or the like, increasing the number of parts.

  Furthermore, when using a commercial power source, there is a problem that ventilation cannot be performed if the power supply is stopped due to a power failure or the like.

  Accordingly, an object of the present invention is to provide a high-performance ventilator that solves the above-described problems and increases the reliability of the user by operating the ventilator as required.

  Another object of the present invention is to provide a high-quality photovoltaic power generation system configured to power up a solar cell and control start and stop of the ventilator for the ventilator of the present invention. .

  The ventilation device of the present invention is detected by a fan motor driven by a solar cell, an illuminance measuring unit that measures light illuminance on the solar cell, an output voltage generating unit that supplies output to the fan motor, and the illuminance measuring unit. A reference time setting unit that includes a reference storage unit that stores both sunrise and sunset times as a reference time based on the illuminance data, and further, the fan at a predetermined time defined with respect to the reference time A control comprising a time adjustment unit that stores start and stop of the motor, and a time control unit that controls start and stop of the output voltage generation unit based on the data of the reference time setting unit and the data of the time adjustment unit It consists of a part.

  The ventilator according to the present invention is characterized in that the reference time setting unit is a clock unit having a clock function.

  Furthermore, the ventilator of the present invention is provided with a reference illuminance unit for storing light illuminance at the start and stop of the fan motor, and the control unit has illuminance data acquired by the illuminance measurement unit and reference illuminance of the reference control unit. And an illuminance control unit configured to perform start and stop control on the output voltage generation unit.

  The ventilator according to the present invention is characterized in that input means capable of inputting arbitrary time and illuminance is provided to the time adjustment unit and / or the reference illuminance unit.

  The ventilator according to the present invention is characterized in that the output voltage generator is provided with a boosting means or a step-down means.

  Another ventilator of the present invention includes a backup power supply unit that complements the power generation of the solar cell or serves as a power supply source when the solar cell is not generating power.

  The solar power generation system according to the present invention includes the ventilator according to the present invention and a solar cell, and is characterized in that the solar cell is powered to control the start and stop of the ventilator.

  According to the ventilator of the present invention, a fan motor driven by a solar cell, an illuminance measuring unit that measures the light illuminance on the solar cell, an output voltage generating unit that supplies an output to the fan motor, and A reference time setting unit including a reference storage unit that stores both sunrise and sunset times as reference times based on the illuminance data detected by the illuminance measurement unit, and a predetermined time defined with respect to the reference time A time adjustment unit that stores start and stop of the fan motor, and a time control unit that controls start and stop of the output voltage generation unit based on data of the reference time setting unit and data of the time adjustment unit. It consists of a control unit equipped to measure and convert the output voltage, short-circuit current, etc. of the solar cell, and from the measured value, sunset, sunrise, and the intermediate point that is the middle point Approximate timing can be inferred, and by giving instructions to operate how many hours ago and how many hours later with respect to the reference time as these timings, temporal control is possible even without a calendar function A solar cell type ventilator can be provided.

  Further, according to the ventilator of the present invention, it is preferable that a backup power supply is provided, so that illuminance can be measured even during the night, and illuminance data can be monitored for 24 hours.

  According to the ventilator of the present invention, the same control can be performed by providing a clock function instead of setting a reference time axis such as sunset, sunrise, or the intermediate time between them.

  Furthermore, in the ventilator according to the present invention, by providing a reference illuminance, it is possible to control the start and stop with light illuminance from the illuminance data acquired as needed as well as the time, and furthermore, the day varies depending on the season and installation location. Low memory at high humidity at night or in rainy weather without memory and humidity sensor for storing huge amounts of data related to sunset and sunrise, and without requiring the installer to enter data such as date and time, latitude and longitude of the installation location At the time of illuminance, it is possible to control to stop the fan motor.

  Further, according to the present invention, the time adjustment unit and / or the reference illuminance unit is provided with an input unit that can input arbitrary time and illuminance, so that the user can start and stop at a desired time. For example, it is possible to start up in accordance with the user's getting up.

  Further, by providing the output voltage generating unit with a boosting unit or a stepping-down unit, automatic air volume adjustment in an arbitrary time zone can be performed. For example, it is possible to make a breeze in the early morning.

  Hereinafter, the photovoltaic power generation system and the ventilator of the present invention will be described in detail based on the drawings schematically showing the embodiments.

  FIG. 1 shows an outline of a photovoltaic power generation system according to the present invention, which includes a ventilation device according to the present invention and a solar cell. And this solar cell is powered, and the ventilation apparatus of this invention is controlled to start and stop.

  FIG. 2 shows an outline of another photovoltaic power generation system of the present invention, which similarly includes the ventilation device of the present invention and a solar cell.

  FIG. 3 shows the sunrise according to the season, the change in sunset time, and the intermediate time setting according to the present invention.

  First, according to FIG. 1, 11 is a solar cell as a main power source, and 10 is a ventilator of the present invention.

  The ventilation device 10 includes a fan motor 12 driven by a solar cell 11, an output voltage generation unit 13 that controls electric power supplied to the fan motor 12, an illuminance measurement unit 15 that monitors the output of the solar cell 11, and a time adjustment. The unit 17 includes a reference time setting unit 16 and a control unit 14.

  Further, a backup power supply unit 18 serving as a power supply source may be provided at the time of non-power generation of the solar battery 11 serving as the main power supply, thereby supplementing the decrease in output of the solar battery 11.

  In the solar cell 11 constituting the solar power generation system of the present invention, the illuminance on the solar cell 11 is measured at any time by the illuminance measuring unit 15 for 24 hours, and the reference time setting unit 16 changes the illuminance and the amount of sunlight. The time is estimated and stored, and then controlled according to the time axis.

  The fan motor 12 is started or stopped by such control.

  The number of hours before and after the time axis is set as the reference time is stored in the time adjustment unit 17 using the input unit 21 in advance and stored in the reference time setting unit 16. Based on the reference time data and the data of the time adjustment unit 17, the control unit 14 can control at a desired time.

  The operation described above will be described in detail later.

  The ambient light illuminance by sunlight can be measured by the voltage or current output from the solar cell 11, but the power to be measured at night when the solar cell is not generating power or under low illuminance such as cloudy weather at sunset. Cannot be obtained.

  Therefore, by operating the illuminance measuring unit 15 and the reference time setting unit 16 with the backup power source 18 at night, the light illuminance can be measured on a 24-hour basis. The sun and sunset can be read by comparing the rate of change in illuminance, and there is a clear difference in light intensity between daytime and nighttime even on rainy days. You can know the approximate time.

  On the basis of the time axis of sunrise and sunset thus obtained, it is possible to start and stop hours and hours before sunrise and sunset.

  The time axis of sunrise and sunset is stored as a reference time in the reference storage unit 26 that stores both the sunrise and sunset times in the reference time setting unit 16, and the time difference with respect to the reference time is stored in the time adjustment unit 17 in advance. Has been.

  Therefore, for example, when the data indicating that the reference storage unit 26 that stores the sunrise and sunset is started one hour after the time when the reference storage unit 26 determines that the sunrise has been input to the time adjustment unit 17 in advance, the fan motor 12 is started. The calculation is performed by the time control unit 25 in the control unit 14, and the control is performed by the output voltage generation unit 13 to start up 1 hour after sunrise.

  In addition, the daytime of the day is considered to be approximately the same as the daytime of the previous day, so if you know the daytime of the previous day from the previous day's sunrise and sunset data, You can know the approximate sunset time on the axis.

  When this is calculated and stored in the reference storage unit 26 that stores the sunrise and sunset as a new reference time, it is possible to control how many hours before sunset, etc.

  In addition, in the reference storage unit 26 that stores the sunrise and sunset, correction based on the past data as well as the previous day's data, and predicting the daytime of the day, more accurate activation and A stop can be made.

  Furthermore, not only the above-mentioned reference time based on sunset and sunrise, but also the fact that the time exactly halfway between sunset and sunrise is constant throughout the year. Use time as an intermediate time reference.

  Specifically, an intermediate time reference storage unit 28 is provided in the reference time setting unit 16, and an intermediate time is calculated based on sunset and sunrise time data in the reference storage unit 26.

  Based on this reference time, starting and stopping according to the instruction of how many hours before and how many hours after starting, with the intermediate time input in advance in the time adjustment unit 17 as the reference time, Even when sunset or sunrise is not clear on the previous day, the fan motor 12 can be started and stopped without malfunction.

  In addition, as shown in FIG. 3, when the season approaches the winter solstice, the sunrise will be delayed and the sunset will be early.

  As you approach the summer solstice, the sun goes up earlier and the sunset goes slower. The rate of change in sunrise and sunset times is almost the same as that in the middle of sunrise and sunset, and the intermediate time is substantially constant.

  Therefore, by setting this intermediate time as the reference time and before and after several hours, it is possible to start and stop at a certain time every day.

  Specifically, if the daytime length of the previous day's data in the reference storage unit 26 that stores the sunrise and sunset is 12 hours, the intermediate time is 6 hours from the sunrise, and the day of the day The time point 6 hours after departure is the reference time, and is stored in the reference storage unit 26 that stores the sunrise and sunset.

  Further, if the data input in advance to the time adjustment unit 17 is activated 4 hours before the reference time and stopped after 5 hours, the time control unit 25 is activated 2 hours after the daylighting time of the day, and 11 It calculates that the vehicle will stop after a certain time (one hour before sunset), and transmits it to the output generator 13 to control the fan motor 12.

  When the above-mentioned time is converted into a normal time, if the previous day and the day's sunrise are approximately 6 o'clock, the start and stop will be 8 o'clock and 17 o'clock respectively.

  Even if the length of the day is 10 hours, it can be expected that both sunrise and sunset are 1 hour, sunrise is early and sunset is late, and the intermediate time is no different from 12:00.

  Accordingly, even in this case, if the value of the time adjustment unit 17 does not change from starting at 4 hours before the reference time of the intermediate time and stopping at 5 hours, it is almost the same time at 8:00 and 17:00. Start and stop.

  According to such a method, even if it does not have a calendar function etc., it can change automatically to start and stop according to a season.

  As described above, by using the light intensity of the solar cell as the reference time, the time function that was not possible with the ventilation device driven by the solar cell can be used by using the clock function. It can be done without having to set the clock.

  Next, another photovoltaic power generation system of the present invention will be described with reference to FIG.

  According to this figure, as in the photovoltaic power generation system shown in FIG. 1, the time setting as the initial setting and the calculation as described above are not performed, and instead of the reference setting unit as in the ventilation device 29 shown in FIG. Time control can also be performed by providing a clock unit 19 and starting and stopping according to the time of the clock unit 19.

  Specifically, a reference illuminance unit 20 that stores activation and deactivation light illuminance as a reference for activation and deactivation with respect to the illuminance of the solar cell 11 is provided. In the illuminance control unit 24 provided in the control unit 14, the illuminance measurement unit 15 Compared with the illuminance data sent from time to time, the output voltage generation unit 13 performs start and stop control within the start time of the time control unit 25.

  With this configuration, a memory that stores a huge amount of data related to sunset and sunrise, which varies depending on the season and installation location required for commercial power supply ventilators, humidity sensors, installation date / time and installation by the installer The complicated operation of inputting initial data such as the latitude and longitude of the place is not required, and the fan motor can be stopped at night and in low light with high humidity during rainy weather.

  Further, a circuit such as a step-up circuit or a step-down circuit is provided in the output generation unit 13 so that the rotation speed of the fan motor 12 can be controlled by changing the voltage to an arbitrary voltage. The time adjustment unit 17 also has an arbitrary time zone. And the voltage data to be output in the time zone, the control unit 14 controls the output generation unit 13 to output an arbitrary voltage in the arbitrary time zone based on the data input to the time adjustment unit 17. Thus, the fan motor 12 can be rotated at a desired air volume in a desired time zone.

  For example, noise caused by a fan in the early morning is annoying, so when ventilation is desired, it is possible to simultaneously take measures against noise and increase the ventilation volume as control such as turning at a weak air volume for one hour from the start of activation.

  In addition, the input unit 21 that can input data to the time adjustment unit 17 and the reference illuminance unit 20 allows the user to set start and stop at an arbitrary time.

  Furthermore, by providing the display means 22 for displaying data by the control unit 14 or the like, it is possible to display the confirmation of the control content, the state confirmation of the fan motor operating state, the current light illuminance, etc., and help the user to set the time. It becomes.

  Further, by adding a clock function to the ventilator 10 that is controlled on the time axis of sunrise and sunset as described above, the reference time of sunset and sunrise predicted from the data up to the previous day can be set as the clock time. Compared to the clock time, it can also be displayed as, for example, tomorrow's sunrise time or sunset time of the day. Based on this display, the user can input how many hours later or how many hours ago. By doing so, fine adjustment of starting and stopping the next day may be possible.

It is a circuit diagram which shows the outline of the solar energy power generation system of this invention. It is a circuit diagram which shows the outline of the other photovoltaic power generation system of this invention. It is a diagram which shows the change of the sunrise according to a season, the sunset time, and the intermediate time setting which concerns on this invention. It is a circuit diagram explaining the form of the conventional drive ventilation device typically. It is a circuit diagram which shows the outline of the conventional solar power generation system.

Explanation of symbols

7: Transistor 8: Fan control circuit 10: Ventilator 11: Solar cell 12: Fan motor 13: Output voltage generator 14: Controller 15: Illuminance measuring unit 16: Reference time setting unit 17: Time adjusting unit 18: Backup power source Unit 19: clock unit 20: reference illuminance unit 21: input unit 22: display unit 24: illuminance control unit 25: time control unit 26: reference storage unit 28: intermediate reference storage unit 29: ventilator 41: constant voltage circuit 42 : Voltage determination circuit 43: Delay timer circuit 44: Resistor 45: Resistor 51: Commercial power supply 52: AC / DC converter 54: Switch 55: Solar timer unit 56: Clock unit 57: Calendar unit 58: Time storage unit 59: Setting unit 60: District setting storage unit 61: District correction data storage unit 62: Loose setting setting unit 63: Quit setting storage unit 64: Time calculation unit 65: Comparison unit 66: Contact Moving parts
J1, J2: Ventilator

Claims (8)

A fan motor driven by a solar cell, an illuminance measuring unit that measures light illuminance on the solar cell, an output voltage generating unit that supplies output to the fan motor, and illuminance data detected by the illuminance measuring unit A reference time setting unit having a reference storage unit that stores both the time of departure and sunset as a reference time, and further stores the start and stop of the fan motor at a predetermined time defined with respect to the reference time And a control unit including a time control unit that controls start and stop of the output voltage generation unit based on data of the reference time setting unit and data of the time adjustment unit. And ventilator. The ventilation apparatus according to claim 1, wherein the reference time setting unit sets an intermediate time with respect to both sunrise and sunset times as the reference time. The ventilation device according to claim 1 or 2, wherein the reference time setting unit is a clock unit having a clock function. A reference illuminance unit is provided for storing light illuminance at the start and stop of the fan motor, and the control unit compares the illuminance data acquired by the illuminance measurement unit with the reference illuminance of the reference control unit, and controls start and stop. The ventilation apparatus according to any one of claims 1 to 3, further comprising an illuminance control unit configured to perform the output voltage generation unit. The ventilation device according to any one of claims 1 to 4, further comprising an input unit capable of inputting arbitrary time and illuminance to the time adjustment unit and / or the reference illuminance unit. The ventilation apparatus according to any one of claims 1 to 5, wherein the output voltage generation unit is provided with a step-up unit or a step-down unit. The ventilation device according to any one of claims 1 to 6, further comprising a backup power supply unit that complements the power generation of the solar cell or serves as a power supply source when the solar cell is not generating power. A solar power generation system comprising the ventilator according to claim 1 and a solar cell, wherein the solar cell is powered to start and stop the ventilator.

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