JPH06300607A - Electronic circuit in water purifier - Google Patents

Abstract

PURPOSE:To save power of dry cell, etc., by a constitution wherein power is fed from a stand-by power supply, e.g. dry cells, upon deterioration of the capacity of main power supply comprising a power storage section and solar cells. CONSTITUTION:A power storage section 14 in a main power supply section 10 feeds power to a signal processing/displaying section through a constant voltage circuit 26. A voltage monitoring IC 28 in a switching means 18 has an input terminal T2 for normally monitoring the output voltage from the power supply section 10. When the output voltage from the power supply section 10 is between 4.7V and 5V, potential at the output terminal of the IC 28 is equal to 0V and thereby a transistor Q4 is turned ON. Since the output voltage from a stand-by power supply means is set at 4.5V, power is fed from the power supply section 10. When the output voltage from the power supply section 10 drops below 4.7V, potential at the terminal T4 is equalized thereto thus turning the Q4 OFF. At that time, power is fed to the display section from the stand-by power supply means. When the Q4 is turned OFF, the power storage section is charged by solar cells 12 and when the output voltage from the power supply section 10 exceeds 4.7V, the Q4 is turned ON thus feeding power to the display section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic circuit of a water purifier having a function of measuring, displaying and storing an accumulated used flow rate or an accumulated used time in a water purifier.

[0002]

2. Description of the Related Art Some water purifiers have a function of measuring, displaying and storing a cumulative usage flow rate or cumulative usage time for the purpose of informing the user of the replacement time of hollow fibers or activated carbon inside the purifier. is there. There are small-sized water purifiers such as those directly connected to the faucet, and electric power is supplied to a built-in electronic circuit by a dry battery or a storage battery.

In the electronic circuit of the water purifier described above, power is supplied to all electronic circuits when the water passage lever of the water purifier is set to the water passage side, and when the water passage lever is set to the non-water passage side. In general, power is supplied to the storage unit in the signal processing display unit that stores the accumulated use flow rate or the accumulated use time and, if necessary, some other circuits.

[0004]

The water purifier described above is useful when it is used by operating the water passage lever of the water purifier. However, when operating the water faucet at the entrance of the water purifier with the water passage lever on the water side, when not operating the water supply, not only the storage section in the signal processing display section The circuit will be energized. In this case, as a matter of course, the total power consumption increases, and the number of times the dry battery is replaced or the number of times the storage battery is charged is necessarily increased.

Therefore, according to the present invention, the energy of the dry battery or the storage battery conventionally used as the main power source is saved even when the water faucet at the entrance of the water purifier is operated with or without water, and the number of times of replacement of the dry battery or An object of the present invention is to provide an electronic circuit of a water purifier that can reduce the number of charging times of a storage battery.

[0006]

In order to achieve the above object, in the present invention, a dry battery or a storage battery, which has been conventionally used as a main power source, is used as a standby power source, and an integrated used flow rate or integrated used time is newly measured. When a main power supply unit having a power storage unit for supplying power to a signal processing display unit for displaying and storing and a solar cell for charging the power storage unit is provided, and the power supply capability of the main power supply unit is lowered. An electronic circuit of a water purifier that uses a standby power source such as a dry battery as a power supply source.

That is, according to the present invention, there are provided a signal processing display section for measuring, displaying and storing an accumulated used flow rate or an accumulated used time, a power storage section for supplying power to the signal processing display section and the power storage section. A main power supply unit having a solar cell for charging, a standby power supply means for supplying power to the signal processing display unit when the output voltage of the main power supply unit drops, and an output voltage of the main power supply unit. Accordingly, there is provided an electronic circuit of a water purifier having a switching unit that uses either one of the main power supply unit and the standby power supply unit as a power supply source to the signal processing display unit.

Further, a signal processing display section for measuring, displaying and storing an accumulated used flow rate or an accumulated used time, a power storage section for supplying power to the signal processing display section and a power source for supplying power to the power storage section. A main power supply unit having a solar cell,
Backup power supply means for supplying power to the signal processing display portion when the output voltage of the main power supply portion drops; and the main power supply portion when the output voltages of the main power supply portion and the backup power supply means are equal. Connection means for using both of the standby power supply means and, in other cases, one of the main power supply portion and the standby power supply means as a power supply source to the signal processing display portion according to the output voltage of the main power supply portion. An electronic circuit of a water purifier having is provided.

[0009]

Embodiments Embodiments will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a first embodiment of an electronic circuit of a water purifier of the present invention. The main power supply unit 10 includes a power storage unit 14 for supplying power to a signal processing display unit 20 that measures, displays, and stores an integrated usage flow rate or an integrated usage time of a water purifier, and a solar cell 12 for charging the power storage unit 14. It has a constant voltage circuit 26 and an overcharge prevention unit 15. Standby power supply means 1
Reference numeral 6 is an auxiliary to the main power source unit 10, and the switching unit 18 switches the power supply source to either the main power source unit 10 or the standby power source unit 16 according to the output voltage of the main power source unit 10.

FIG. 2 shows the main power supply unit 10 of the block diagram of FIG.
3 is an electronic circuit diagram of the switching means 18. FIG. Main power supply unit 10
In, the power storage unit 14 is charged by the solar cell 12,
Electric power is supplied through the constant voltage circuit 26. Also, the power storage unit 1
4 is protected by the overcharge prevention unit 15. Electronic circuit voltage monitoring IC 28 functioning as switching means 18
Constantly monitors the output voltage of the main power supply unit 10 at the input terminal T2, and turns on / off the transistor Q4 according to the output voltage to set the power supply source to either the main power supply unit 10 or the standby power supply means 16. Switch to one.

First, the output voltage of the main power supply unit 10 is 4.7V.
When the voltage is larger than 5V and lower than 5V, the potential of the output terminal T4 of the voltage monitoring IC 28 becomes 0V, and the transistor Q4 is turned on. The output voltage of the standby power supply means 16 is 4.5
Since it is set to V and smaller than the main power supply unit 10, power is supplied from the main power supply unit 10 to the signal processing display unit 20.
On the other hand, the power supply capability of the main power supply unit 10 decreases,
When the output voltage of the output voltage becomes less than 4.7V, the potential of the output terminal T4 of the voltage monitoring IC 28 becomes equal to this value and the transistor Q4 is turned off. At this time, the signal processing display unit 20 is supplied with power from the standby power supply means 16.

When the transistor Q4 is turned off, the power storage unit 14 is charged by the solar cell 12, and when the output voltage of the main power supply unit 10 exceeds 4.7 V thereafter, the transistor Q4 is turned on again to perform signal processing. Electric power is supplied to the display unit 20. As the voltage monitoring IC 28, ICL8211 manufactured by Harris Company, USA is used.

FIG. 3 shows a second electronic circuit of the water purifier of the present invention.
FIG. 4 is a block diagram showing the configuration of the embodiment, and FIG. 4 is an electronic circuit diagram of the main power supply unit 30 and the connecting means 38 in the block diagram of FIG. The electronic circuit of the water purifier of the second embodiment differs from that of the first embodiment in that the connecting means 38 is used in place of the switching means 18 in its configuration.

The connecting means 38 responds to both the main power source section 30 and the standby power source section 36 when the output voltages of the main power source section 30 and the standby power source section 36 are equal, and to the output voltage of the main power source section 30 in other cases. Either the main power source unit 30 or the standby power source unit 36 is used as a power supply source to the signal processing display unit 40. The other main power source unit 30, the standby power source unit 36, and the signal processing display unit 40 are the same as the electronic circuit of the water purifier of the first embodiment.

In the electronic circuit diagram of FIG. 4, the main power supply section 3 is formed by the diodes D46 and D48 of the circuit functioning as the connecting means 38.
When the output voltage of 0 is larger than the output voltage of the standby power supply means 36, power is supplied from the main power supply section 30 to the signal processing display section 40, and when the output voltage of the main power supply section 30 is equal to the output voltage of the standby power supply means 36. Is the main power source unit 30 and the standby power source unit 3.
Electric power is supplied to the signal processing display unit 40 from both of 6 and 6.
When the output voltage of the main power source unit 30 is lower than the output voltage of the standby power source unit 36, power is supplied from the standby power source unit 36 to the signal processing display unit 40. At this time, the power storage unit 34 of the main power supply unit 30 is charged by the solar battery 32, and the main power supply unit 30 is charged.
When the output voltage of the above is higher than or equal to the output voltage of the standby power supply means 36, power is supplied from the main power supply section 30 to the signal processing display section 40. In the above two embodiments, a CR integration circuit or an LCR integration circuit can be used as the power storage units 14 and 34 in addition to the storage battery.

[0016]

As described in the above two embodiments, according to the present invention, power is mainly supplied to the signal processing display section from the main power source section having the power storage section and the solar cell, and the power source of the main power source section is supplied. When the capacity decreases, power is temporarily supplied from the standby power supply unit to the signal processing display unit.

Therefore, according to the present invention, the main power source section having the power storage section and the solar cell can supply a part or all of the electric power required for the electronic circuit of the water purifier, and the dry cell or the storage battery used for the standby power source. The number of exchanges or recharges can be reduced. In particular, the electronic circuit of the water purifier that stores the cumulative usage flow rate or the cumulative usage time always needs to be energized, and the power consumption tends to increase, so the present invention is useful.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment for explaining an electronic circuit of a water purifier of the present invention.

FIG. 2 is an electronic circuit diagram of a main power source unit and a switching means of a first embodiment for explaining an electronic circuit of the water purifier of the present invention.

FIG. 3 is a block diagram of a second embodiment for explaining the electronic circuit of the water purifier of the present invention.

FIG. 4 is an electronic circuit diagram of a main power source section and a connecting means of a second embodiment for explaining the electronic circuit of the water purifier of the present invention.

[Explanation of symbols]

10,30 Main power supply unit 12,32 Solar battery 14,34 Storage unit 15,35 Overcharge prevention unit 16,36 Standby power supply unit 18 Switching unit 20,40 Signal processing display unit 22,42 Overcharge prevention circuit 26,46 Voltage circuit 28 Power supply voltage monitoring IC 38 Connection means 50 Power transmission path D2, D4, D6, D42, D44, D46, D48
Diodes Q2, Q4, Q42 Transistors R2, R4, R6, R8, R42, R48 Resistors T2 Power supply voltage monitoring IC input terminal T4 Power supply voltage monitoring IC output terminal

Claims (2)

[Claims] 1. An integrated usage flow rate or an integrated usage time is measured,
A signal processing display unit for displaying and storing, a main power supply unit having a power storage unit for supplying power to the signal processing display unit and a solar cell for charging the power storage unit, and an output voltage of the main power supply unit A standby power supply unit for supplying power to the signal processing display unit when the voltage drops, and one of the main power supply unit and the standby power supply unit is provided in the signal processing display unit according to the output voltage of the main power supply unit. An electronic circuit of a water purifier having a switching means as a power supply source to the. 2. An integrated usage flow rate or an integrated usage time is measured,
A signal processing display unit for displaying and storing, a main power supply unit having a power storage unit for supplying power to the signal processing display unit and a solar cell for supplying power to the power storage unit, and the main power supply unit A backup power supply means for supplying power to the signal processing display portion when the output voltage drops, and a backup power supply means for the main power supply portion and the backup power supply means when the output voltages of the main power supply portion and the backup power supply means are equal. Both, in the other case of the water purifier having a connection means using either one of the main power supply unit and the standby power supply means as a power supply source to the signal processing display unit according to the output voltage of the main power supply unit Electronic circuit.