JP2015126656A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem of a power supply device where a power supply unit is provided for each of a plurality of loads, and these plurality of power supply units are connected in parallel, that when external power supply is started and all power supply units are operated, even such a power supply unit for load not required to be operated at a moment in time of starting power supply is also operated, and it is undesirable for energy saving.SOLUTION: A plurality of power supply units are provided and juxtaposed, one of these plurality of power supply units serves as a main power supply unit and the reminder serve as sub-power supply units. Each sub-power supply unit is provided with an operation prohibition section 5 for prohibiting operation of the sub-power supply unit when power supply from a commercial power supply is started, and also provided with operation prohibition release means 52 for releasing operation prohibition in the operation prohibition section by an external command, and operating each sub-power supply unit individually.

Description

  The present invention relates to a power supply apparatus in which a main power supply unit and a sub power supply unit are connected in parallel to each other.

  As this type of conventional power supply device, for example, it is built in a charging device that charges a rechargeable battery, and includes a plurality of power supply units connected in parallel to each other, and once all the power supply units are started To start charging, but when the current value required for charging is small, the power supply unit is turned off sequentially and charging is performed with the minimum number of power supply units. It is known (see, for example, Patent Document 1).

JP 2008-187865 A (paragraph [0017])

  In the conventional power supply device described in Patent Document 1, a plurality of power supply units are used for one load called a rechargeable battery, but the power supply device incorporated in a device incorporating a plurality of types of loads. In addition, when a power supply device having a plurality of power supply units is applied and each power supply unit is individually connected to the load, all loads are activated when power supply from an external commercial power supply is started. It may not be necessary to let

  For example, in a water purifier that electrolyzes water and discharges alkaline ionized water, it is necessary to operate the control unit at the same time as turning on the power, but it is not necessary to perform electrolysis of water until a water discharge operation is performed thereafter. . In such a water purifier, even if a power supply unit for operating the control unit and a power supply unit for electrolyzing water are separately provided, if both power supply units are simply connected in parallel, a power switch When is turned on, the power supply unit for the control unit is preferably activated, but the power supply unit for unnecessary electrolysis is also activated.

  After the control unit is activated, the control unit stops the operation of the unnecessary power source unit for electrolysis, but the power source unit that does not need to be activated operates even for a short time and is used for electrolysis. There is a problem that electric power is supplied.

  In view of the above problems, an object of the present invention is to provide a power supply device in which only a necessary power supply unit operates when a power switch is turned on, even if the power supply device includes a plurality of power supply units.

  In order to solve the above-described problem, a power supply device according to the present invention includes a power supply unit that converts AC power supplied from an external commercial power source into DC power and supplies the power to each load. The power supply units are connected in parallel, and one of the plurality of power supply units is used as a main power supply unit, and the rest is used as a sub power supply unit, and power supply from the commercial power supply is started to each sub power supply unit. In addition to providing an operation prohibition unit that prohibits the operation of the sub power supply unit, and provided with an operation prohibition release means for canceling the operation prohibition by this operation prohibition unit by an external command and operating each sub power supply unit individually. Features.

  According to the present invention, when the power supply is started, all the sub power supply units other than the main power supply unit are brought into the operation stop state, thereby prohibiting the sub power supply unit from operating even for a short time. And if it comprises so that the electric power for operation | movement of the control part which controls the action | operation of this power supply device may be supplied from a main power supply part, after a control part starts, a required sub power supply part is operated separately.

  Specifically, the sub power supply unit is configured by a switching power supply, and the operation prohibiting unit employs a configuration in which the operation of the sub power supply unit is prohibited by stopping oscillation on the primary side of the switching power supply. Can do.

  As is clear from the above description, the present invention is excellent in energy saving even if it is a power supply device having a plurality of power supply units, since unnecessary operation of the power supply unit does not occur.

The block diagram which shows the structure of the water purifier to which this invention is applied. Circuit diagram showing the configuration of the power supply

  Referring to FIG. 1, reference numeral 1 denotes a water purifier in which a power supply device 2 according to the present invention is incorporated. An electrolysis chamber 11 is provided in the water purifier 1, and is divided into left and right by a diaphragm 11c provided in the center, and electrodes 11a and 11b for electrolysis are attached to each of them. Both electrodes 11a and 11b are connected to a drive circuit 16 for electrolysis, and the drive circuit 16 is configured to be supplied with DC power from a power supply device.

  A control unit 15 for controlling the overall operation of the water purifier 1 is provided, and driving power for the control unit 15 is also supplied from the power supply device 2. This power supply device 2 feeds AC power from an external commercial power supply, converts it into DC power internally, and supplies it to each load such as the control unit 15 and the drive circuit 16.

  When DC power is supplied from the drive circuit 16 to the electrodes 11a and 11b, the water led from the introduction pipe 12 connected to the water supply into the electrolysis chamber 11 is electrolyzed into alkaline ionized water and acidic water. The alkaline ionized water is discharged from the outlet pipe 13, and the acidic water is discharged from the drain pipe 14.

  Referring to FIG. 2, this power supply device 2 includes two power supply units in the present embodiment. That is, one main power supply unit and one sub power supply unit. Reference numeral 3 denotes a primary side of the main power supply unit, which oscillates DC power rectified by the rectifying unit 22 at a predetermined frequency, induces AC power of a predetermined voltage to the secondary side 31, and converts it to DC on the secondary side. A switching power supply that rectifies and supplies the rectified power to the control unit 15 is configured.

  Reference numeral 4 denotes a primary side of the sub power source unit, which is configured by a switching power source like the main power source unit, and configured to supply DC power from the secondary side 41 to the drive circuit 16.

  The DC power rectified by the rectifying unit 22 is supplied to the primary side 3 of the main power supply, and is also supplied via the line 23 to the primary side 4 of the sub power supply unit connected in parallel thereto. It is comprised so that. Therefore, when the power supply from the commercial power supply 21 is started, DC power is simultaneously supplied to the primary side 3 of the main power supply unit and the primary side 4 of the sub power supply unit.

  However, the operation prohibiting section 5 is provided for the sub power supply section. The operation prohibiting unit 5 includes a transistor 51 that is turned on when the supply of DC power from the rectifying unit 22 is started. Since the transistor 51 is attached between the gate 42 of the FET 41 in the primary side 4 of the sub power supply unit and the ground line, the gate 42 falls to the ground when the transistor 51 is turned on, and 1 of the sub power supply unit. The secondary side 4 does not oscillate. Therefore, even if DC power is supplied from the line 23, DC power is not output from the secondary side 41.

  A phototransistor 52 constituting a photocoupler is attached between the base of the transistor 51 and the ground in the operation prohibiting section 5. An LED (not shown) paired with the phototransistor 52 is configured to be turned on and off by the control unit 15.

  Therefore, when the control unit 15 operates the drive circuit 16, the phototransistor 52 is turned on. Then, the base of the transistor 51 falls to the ground, and the transistor 51 is turned off. Then, since the state where the gate 42 of the FET 41 is forcibly dropped to the ground is eliminated, the primary side 4 of the sub power supply unit starts oscillating and the DC power is supplied from the secondary side to the drive circuit 16. Is started.

  In the above embodiment, one sub power supply unit is provided. However, two or more sub power supply units may be provided in parallel. In this case, the operation prohibiting unit 5 is provided in each sub power supply unit.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Water purifier 2 Power supply device 5 Operation prohibition part 11 Electrolysis chamber 15 Control part 16 Drive circuit 21 Commercial power supply 22 Rectification part 23 Line 51 Transistor

Claims (2)

  In a power supply device including a power supply unit that converts AC power supplied from an external commercial power supply into DC power and supplies the load to each load, the power supply unit is provided in a plurality, and the power supply units are connected in parallel. One of the plurality of power supply units is a main power supply unit, and the remaining is a sub power supply unit, and each sub power supply unit is provided with an operation prohibiting unit that prohibits the operation of the sub power supply unit by starting the power supply from the commercial power supply. In addition, the power supply apparatus is provided with operation prohibition release means for canceling the operation prohibition by the operation prohibition unit according to a command from the outside and operating each sub power supply unit individually.   2. The power supply according to claim 1, wherein the sub power supply unit is constituted by a switching power supply, and the operation prohibiting unit prohibits the operation of the sub power supply unit by stopping the oscillation of the primary side of the switching power supply. apparatus.

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