Patent Application
20100213875
1. Field of the Invention
The present invention relates to a power supply controlling device, and more particularly, to a power supply controlling device which determines whether to turn on or off a power supply according to daily sunrise or sunset times.
2. Description of the Prior Art
Generally, a traditional power supply controlling device uses an optical sensor or a timer for turning on the light when it's dark and turning off the light when it's bright to save energy.
However, the optical sensor or the timer can only turn on/off the light at specified times, they cannot precisely determine when the light should be turned on or off according to daily sunset and sunrise times and fail to provide the best energy saving capability.
Therefore, the traditional power supply controlling device still presents some shortcomings to be overcome.
In view of the above-described deficiencies of the traditional power supply controlling device, after years of constant efforts in research, the inventor of this invention has consequently developed and proposed an innovative power supply controlling device in the present invention.
It is an object of the present invention to provide a power supply controlling device, which stores daily sunrise and sunset data from January 1st to December 31st in a main controlling unit for the main controlling unit to compare them with a present time; when the main controlling unit determines that the present time is the sunrise or sunset time, it controls a AC power supply to turn on or off a light automatically without human intervention to save energy.
In order to achieve the above object, the power supply controlling device comprises a rectifying and filtering circuit, a DC power supply generating circuit, a battery, a daylight saving time selector switch, a set of setup switches, a main controlling unit, an oscillator, a driving circuit, an LCD display, an LCD power supply circuit, a resetting circuit and a relay; when the rectifying and filtering circuit receives an AC power signal, it converts, rectifies and filters the AC power signal and transmits it to the DC power supply generating circuit; the DC power supply generating circuit can output various DC power signals having different voltages to the rechargeable battery and the driving circuit to charge the rechargeable battery so as to let the rechargeable battery provide a DC power signal to the main controlling unit; the main controlling unit stores daily sunrise and sunset data from January 1st to December 31st; the set of setup switches is provided for setting the time and the date data for storing in the main controlling unit and for displaying by the LCD display, wherein the date data comprises year/month/day, and the time data comprises hour/minute/second; the selector switch is provided for selecting whether to enter a daylight saving mode or not; the resetting circuit clears all the stored data; the oscillator provides an oscillating signal to the main controlling unit for the main controlling unit to operate normally; when the main controlling unit determines that the time and the date displayed by the LCD display match the stored sunrise or sunset time data and the date, it will transmit a signal to the driving circuit to drive the relay to control the output of the AC power source for turning on a light or other electrical appliances.
These features and advantages of the present invention will be fully understood and appreciated from the following detailed description of the accompanying Drawings.
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a rectifying and filtering circuit 1 for coupling with an AC power supply and then converting, filtering and rectifying an AC power signal and transmit it to a DC power supply generating circuit 2;
the DC power supply generating circuit 2 for receiving the AC power signal from the rectifying and filtering circuit 1, and then the DC power supply generating circuit 2 regulating and filtering the AC power signal to output various DC power signals having different voltages;
a rechargeable battery 3 for receiving the DC power signal from the DC power supply generating circuit 2 and providing a power signal to a main controlling unit 4;
the main controlling unit 4 for storing daily sunrise and sunset data from January 1st to December 31st; the daily sunrise and sunset data is based on an average of the data of the past ten to fifty years;
an oscillator 5 for providing an oscillating signal to the main controlling unit 4 to ensure normal operation of the main controlling unit;
a selector switch 6 for selecting whether to enter a daylight saving mode or not and sending a selection result to the main controlling unit 4;
a set of setup switches 7 coupled with the main controlling unit 4; when the set of setup switches is to set a time and a date, the main controlling unit 4 will drive the LCD display 8 to display the time and date data for comparison and to show the setting result; the LCD display 8 comprises a display interface which shows the data of year/month/date, hour/minute/second, advanced sunset time and delayed sunset time.
a resetting circuit 10 for clearing all stored data in the main controlling unit 4 when the main controlling unit 4 is disconnected from the DC power generating circuit 2;
a driving circuit 11 coupled with the DC power supply generating circuit 2; the driving circuit 11 is provided for driving a relay 12;
the relay 12 coupled with the AC power source; the relay 12 is provided for controlling an output of the AC power source;
when the main controlling unit 4 determines that the time and the date displayed by the LCD display 8 match the stored sunrise or sunset time data and the date, it will transmit a signal to the driving circuit 11 to drive the relay 12 to control the output of the AC power source.
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Alternatively, the present invention can be set to stop providing power at sunset and start providing power at sunrise.
Besides, if it is in the daylight saving mode, the main controlling unit 4 uses the present time plus the daylight saving time (for example, one hour) to determine if the present time plus the daylight saving time matches the sunrise or sunset time, if so, then the main controlling unit 4 will drive the relay 12 to control the output of the AC power source.
The present invention discloses a power supply controlling device, while compared with prior art techniques, is advantageous in:
The present invention uses the main controlling unit to store daily sunrise and sunset time data from January 1st to December 31st for comparison, when the main controlling unit determines that the present time is the sunrise or sunset time, it controls an AC power supply to start supplying power or to stop providing power automatically without human intervention to save energy.
Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.
