JPH04261613A - Hot water feeder - Google Patents

Abstract

PURPOSE:To make either an AC power source 16 or a storage battery 17 available by switching for a power source of a driving motor 12 of a water injection pump 11 in a hot water feeder. CONSTITUTION:When an AC power is supplied from an AC power source 16, a current converted to DC flows through a diode 19a of a switching circuit 18 to a motor 12 to cause a pump 11 to actuate. On the other hand, a storage battery 17 is charged by a DC current supplied through a diode 19b of the switching circuit 18 and resistance 20. When a power is not supplied from the AC power source 16, the storage battery 17 discharges, and the current flows through a diode 19c to the motor 12 to cause the pump 11 to actuate.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention heats and keeps water etc.
The present invention relates to a water heater that supplies hot water to the outside, and particularly relates to an improvement in the power supply circuit of a water injection pump driving motor.

0002

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a power supply circuit for a water injection pump driving motor in a conventional water heater. In this figure, 21 is a water injection pump, 22 is a motor, 23 is a switch, 24 is a rectifier, 25 is a transformer, 2
6 is an AC power supply.

In the power supply circuit configured as described above, the switch 23 is first connected when pouring hot water to the outside. Next, the voltage of the AC power source is lowered by a transformer 25 and converted into a DC current by a rectifier 24. The converted DC current flows to the motor 22 to operate the pump 21.

0004

[Problems to be Solved by the Invention] However, in the conventional power supply circuit having the above configuration, the water injection pump drive motor 22 is configured to be supplied with power only from the AC power supply, so that, for example, after boiling water, There is a problem in that when the water heater is carried to a place where it cannot be connected to an outlet to supply hot water, or when there is no power supply from an AC power source, such as during a power outage, the motor 22 is not driven and water cannot be poured.

[0005] The present invention solves these problems and aims to provide a water heater that can inject water even when AC power is not supplied.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the water heater of the present invention includes a water injection pump driving motor, an AC power source and a battery power source for supplying power to the motor, and an AC power source and a battery power source for supplying power to the motor. and a switching means that is interposed between the AC power source and the motor to give priority to power supply to the motor from the AC power source, and switches to power supply to the motor from the battery power source when power is not supplied from the AC power source. That is.

[0007]

[Operation] According to the above structure, the power supply circuit of the water injection pump motor is divided into a system that supplies power from an AC power supply and a system that supplies power from a battery, and the motor is preferentially supplied with power from the AC power supply. Normally, the motor is driven by an AC power supply, but when power is not supplied from the AC power supply, the switching means switches to power supply from the battery power supply and the motor is driven. It becomes possible to inject water even when

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a power supply circuit for a water injection pump driving motor in the water heater of this embodiment. 11 is a water injection pump, 12 is a motor, 13 is a switch, 14 is a rectifier, 15 is a transformer, 16 is an AC power supply, 1
7 is a storage battery as a battery power source, and 18 is a switching circuit as a switching means.

This switching circuit 18 is interposed between the AC power supply 16 and the storage battery 17 and the motor 12, and gives priority to the power supply to the motor 12 from the AC power supply 16, and when the AC power supply 16 does not supply power, Storage battery 17
This switch switches the power supply to the motor 12 from
It is composed of diodes 19a, 19b, 19c and a resistor 20.

Next, the operation of the power supply circuit configured as described above will be explained. First, when switch 13 is connected,
When AC power is being supplied from the AC power supply 16, the voltage of the AC power supply 16 is lowered by the transformer 15, and converted to DC current by the rectifier 14. The converted DC current flows through the diode 19a of the switching circuit 18 to the motor 12, and the pump 11 operates.

On the other hand, the storage battery 17 is charged with a direct current supplied through the diode 19b and the resistor 20 of the switching circuit 18. If power is not supplied from the AC power source 16, the storage battery 17 is discharged, current flows to the motor 12 through the diode 19c, and the pump 11 operates.

As described above, in this embodiment, since the storage battery 17 is used as a battery power source, there is no need to replace the battery, which is convenient. However, in the present invention, although battery replacement is necessary, it is possible to reduce the size and weight. Of course, it is possible to use dry batteries and the like, which have the advantage of being able to do this.

[0013]

[Effects of the Invention] As explained above, the water heater of the present invention has
Power is supplied to the motor for driving the water injection pump by using power from an AC power source and power from a battery power source, giving priority to power supply to the motor from the AC power source, and when power is not supplied from the AC power source to the motor from the battery power source. By providing a switching means for switching to the power supply, even when AC power is not supplied, power can be supplied from the battery power source, which has the excellent effect of making it possible to drive the motor and inject water. became.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a power supply circuit of a water injection pump driving motor in a water heater according to an embodiment of the present invention.

[Figure 2
] Block diagram showing the power supply circuit of the water injection pump drive motor in a conventional water heater

[Explanation of symbols]

11 Water injection pump 12 Motor 16 AC power supply 17 Battery power supply 18 Switching circuit

Claims (1)

[Claims] [Claim 1] A motor for driving a water injection pump, an AC power source and a battery power source that supply power to the motor, and a power supply to the motor from the AC power source that is interposed between the AC power source, the battery power source, and the motor. What is claimed is: 1. A water heater characterized by comprising: switching means for prioritizing power supply to a motor from a battery power supply when power is not supplied from an AC power supply;