JP3945104B2 - Solar light - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solar light that is equipped with a variable setting device for lighting start ambient illuminance and the like and can start lighting without variation.
[0002]
[Prior art]
Conventional lighting of this type of solar light is generally started by detecting sunset based on the output voltage of the solar cell. However, the output voltage characteristics of the solar cell vary greatly among the solar cells in the low illuminance range, and the characteristics can be managed. There is a problem that it cannot be performed, and the ambient illuminance at the start of lighting varies, and when multiple lamps are installed, there is a variation in lighting start in each solar light.
[0003]
Although it is required to adjust the illumination intensity at the start of lighting and to eliminate variations when multiple lamps are installed, no specific measures have been taken. For this reason, the ambient illuminance at the start of lighting varies, and when there are multiple lamps installed, the variation in lighting start in each solar light has been cleared up because of local sunshine.
[0004]
[Problems to be solved by the invention]
Therefore, the object of the present invention is to set the output voltage of the solar cell to start lighting at a desired lighting start ambient illuminance, and to match the lighting timing of each solar light without variation when installing multiple lamps. It is possible to provide solar lights.
[0005]
[Means for Solving the Problems]
The solar light of claim 1 is a solar battery, a storage battery that charges the power of the solar battery, a lighting circuit that operates with the power of the storage battery, and the lighting when the output voltage of the solar battery falls below a reference value. A control unit for lighting the circuit, the control unit having a memory for storing the reference value, and a lighting start setting button for changing the setting of the reference value, and operating the lighting start setting button Thus, the output voltage of the solar cell at that time is stored in the memory as a new reference value .
[0006]
According to the solar light according to claim 1, the output voltage of the solar cell corresponding to the desired lighting start ambient illuminance is set using the characteristic that the relationship between the output voltage of the solar cell and the ambient illuminance has little variation in solid. The lighting can be started at the desired lighting start ambient illuminance, and the setting of the lighting start illuminance of the solar light can be changed by changing the setting of the reference value.
In addition, since the lighting start setting voltage can be reset by pressing the lighting start setting button, it is easy and reliable to change the lighting start time of the solar light. In addition, the lighting start setting voltage can be reset only by pressing the lighting start setting button installed on the control unit, so the customer can also set it on site. Furthermore, the lighting timing of each solar light can be adjusted without variation for adjustment when using multiple lamps. Moreover, it is possible to match the lighting timing with the lighting fixture that is controlled by the EE switch.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. That is, this solar light has a solar battery SB, a storage battery BT, a lighting circuit 1 and a control unit 2.
[0014]
As the solar cell SB, a known one is applied. In general, the irradiance (W / m ² ) and the output voltage (V) of the solar cell have the relationship shown in FIG.
[0015]
The storage battery BT charges the power of the solar battery SB. A storage battery BT is also used.
[0016]
The lighting circuit 1 is lit by the power of the storage battery BT. In the embodiment, it comprises a ballast 3 and a lamp 4 connected to the ballast 3. The storage battery BT is connected to a booster circuit unit 5 of the control unit 2 to be described later, the booster circuit unit 5 is connected to the polarity inversion circuit unit 6, and the polarity inversion circuit unit 6 is connected to the ballast 3 to operate the ballast 3 . The booster circuit unit 5 and the polarity inversion circuit unit 6 are controlled by a general-purpose microcomputer IC which is a control means in the control unit 2.
[0017]
The control unit 2 compares the output voltage of the solar battery SB with a variably set reference value, and turns on the lighting circuit 1 when the output voltage falls below the reference value. The reference value is stored in the memory IC3 using the EEPROM IC, and the reference value stored in the memory IC3 is rewritten to the value of the output voltage of the solar battery SB by the lighting start setting button of the switch SW1. The control unit 2 of the embodiment is provided in the box of the storage battery BT.
[0018]
In the embodiment shown in FIG. 1, IC ₁ is a regulator IC, IC ₂ is a general-purpose microcomputer IC, IC ₃ is an EEPROM IC, X1 is an oscillator, Q1 is an FET, D1 and D2 are diodes, and R1 to R5 are A resistor SW1 is a switch of a lighting start setting button. In FIG. 2, 10 is various control switches, 11 is various display LEDs, and 12 is a connector.
[0019]
During the daytime, the voltage generated in the solar battery SB charges the storage battery BT by outputting a signal for turning on the FET Q1 by the general-purpose microcomputer IC2. When the voltage of the solar battery SB decreases, the divided voltage VR2 by the diode D2 and the resistors R1 and R2 falls below the voltage Vref1, which is a reference value set by the general-purpose microcomputer IC2, so that it is determined at night and a signal for turning off the FET Q1 is output. At the same time, the booster circuit unit 5 and the polarity inversion circuit unit 6 are operated to supply a voltage to the ballast 3, and the lamp 4 is turned on.
[0020]
When the switch SW1 of the lighting start setting button is turned on, a new setting voltage Vref2 (= VR2) can be stored in the memory IC3, and thereby the lamp 4 can be turned on with a desired ambient brightness (illuminance). is doing.
[0021]
The operation of the solar light will be described with reference to the timing diagram of FIG. 4A and the relationship diagram between the output voltage of the solar cell SB and the irradiance of FIG. 4B. Since it is a solar light operation, a normal timer or EE switch is not used, and lighting is started by recognizing the output voltage of the solar battery SB and detecting sunset. Photovoltaic output voltage as the ambient illuminance is low (at sunset) and 4 (b) is reduced. Compared to a certain lighting start setting voltage V _A , when it becomes V _A or less, it is detected as sunset and the lamp 4 of the lighting fixture is turned on. After the start of lighting, the lighting fixture is turned on for a certain time T by a timer inside the control unit 2, and is turned off after the lapse of T time.
[0022]
At this time, by pressing the switch SW1 of a button of the control unit 2, the solar battery SB at that time is stored in the IC inside the control unit 2 as the new set voltage V _A ', and thereafter, the new set voltage V _A ' Detect sunset at As a result, the lighting start time can be changed from the initial setting.
[0023]
In this way, the control unit 2 can recognize the output voltage of the solar battery SB, detects sunset when it falls below a certain reference value (threshold value, that is, the lighting start setting voltage), and has a lighting circuit. Electric power is supplied to the appliance from the storage battery BT to light it. At this time, by pressing the switch SW1 of the lighting start setting button installed in the control unit 2, the output voltage of the solar cell SB at that time is stored in the control unit 2 and set as a new lighting start setting voltage.
[0024]
According to the first embodiment, the control unit 2 that performs the lighting start operation in the solar light system is provided with a unit that can reset the lighting start setting voltage. By pressing the lighting start setting button of the switch SW1, an operation of setting the output voltage of the solar battery SB at that time as a new lighting start setting voltage is executed. This value can be stored in the control unit 2. Accordingly, it is possible to start lighting the solar light lamp 4 at a desired lighting start ambient illuminance.
[0025]
Therefore, the desired lighting start ambient illuminance is set by setting the output voltage of the solar battery SB corresponding to the desired lighting start ambient illuminance, using the characteristic that the relationship between the output voltage of the solar battery SB and the ambient illuminance is small in solid. The lighting can be started at, and the setting of the lighting start illuminance of the solar light can be changed by changing the setting of the reference value.
[0026]
Further, since the lighting start setting voltage can be reset by pressing the lighting start setting button, it is easy and reliable to change the lighting start time of the solar light. Further, since the lighting start setting voltage can be reset only by pressing the lighting start setting button installed in the control unit 2, the customer can also set it on site. Furthermore, the lighting timing of each solar light can be adjusted without variation for adjustment when using multiple lamps. Moreover, it is possible to match the lighting timing with the lighting fixture that is controlled by the EE switch.
[0033]
【The invention's effect】
According to the solar light of claim 1, the output voltage of the solar cell corresponding to the desired lighting start ambient illuminance is set by using the characteristic that the relationship between the output voltage of the solar cell and the ambient illuminance has little variation in solid. The lighting can be started at the desired lighting start ambient illuminance, and the setting of the lighting start illuminance of the solar light can be changed by changing the setting of the reference value.
Since the lighting start setting voltage can be reset by pressing the lighting start setting button, it is easy and reliable to change the lighting start time of the solar light. In addition, the lighting start setting voltage can be reset only by pressing the lighting start setting button installed on the control unit, so the customer can also set it on site. Furthermore, the lighting timing of each solar light can be adjusted without variation for adjustment when using multiple lamps. Moreover, it is possible to match the lighting timing with the lighting fixture controlled by the EE switch without variation.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram of a first embodiment of the present invention.
FIG. 2 is an external perspective view of a control unit.
FIG. 3 is an explanatory diagram illustrating configurations of a solar battery, a storage battery, and a control unit.
4A is a graph showing turning on and off with respect to time, and FIG. 4B is an output voltage (V) of a solar cell with respect to irradiance (W / m ² ).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lighting circuit 2 Control unit SW1 Button switch SB Solar battery BT Storage battery IC2 General-purpose microcomputer IC
IC3 memory

Claims (1)

A solar battery, a storage battery that charges the power of the solar battery, a lighting circuit that operates with the power of the storage battery, and a control unit that operates the lighting circuit when the output voltage of the solar battery falls below a reference value. The control unit has a memory for storing the reference value, and a lighting start setting button that allows the setting of the reference value to be changed, and the output of the solar cell at that time is operated by operating the lighting start setting button. A solar light characterized in that a voltage is stored in the memory as a new reference value .

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