JPH07111942A - Electric water boiler - Google Patents

Abstract

PURPOSE:To prevent danger of suffering burn or the like by telling the tempera ture detected with a temperature sensor by the supply of a power source from an auxiliary power source during the current is not on by a reporting means to inform a user of danger of high temperature in a liquid within a liquid con tainer. CONSTITUTION:A lid body is provided to cover an opening of a liquid container for holding a liquid, a heating circuit 1 to heat the liquid in the container, a temperature sensor 3 to detect the temperature of the liquid and a control circuit 4 to control the energization of the heating circuit 1 according to the temperature detected with the temperature sensor 3. Moreover, a power source circuit 5 is provided to supply a power source to the control circuit 4 and the heating circuit 1 and a battery to supply a power source to the control circuit 4 during the current is not on when there is no supply of the power source from the power source circuit 5. A display section 9 is provided to display the temperature detected with the temperature sensor 3 by the supply of the power source from the battery during the current is not on when there is no supply of the power source from the power source circuit 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container for containing a liquid, a lid for covering an opening of the liquid container, a heating means for heating the liquid in the liquid container, and a liquid in the liquid container. Electric hot water provided with a temperature sensor for detecting the temperature of the heating means, a control means for controlling the energization of the heating means according to the temperature detected by the temperature sensor, and a power supply section for supplying power to the control means and the heating means. It relates to a heater.

[0002]

2. Description of the Related Art A conventional electric water heater has a liquid container for containing a liquid, a lid for covering the opening of the liquid container, a heating means for heating the liquid in the liquid container, and a liquid container for the liquid container. A temperature sensor for detecting the temperature of the liquid, a control means for controlling the energization of the heating means according to the temperature detected by the temperature sensor, and a power supply part for supplying power to the control means and the heating means. As a high temperature vapor is released when the lid is opened, as a countermeasure against this, a temperature sensor for detecting the temperature of the liquid in the liquid container is provided as described in JP-A-4-347108. Some have been provided with a display unit for displaying the temperature detected by the sensor.

Further, as described in Japanese Patent Laid-Open No. 5-115372, a lid opening / closing determining means for determining the opening / closing of the lid is provided, and the lid opening / closing determining means determines that the lid is open. Some of them have a warning means to warn that.

Further, as described in JP-A-5-103723, a liquid container is detachably provided on the water heater body, a handle is provided on the liquid container, and the liquid container is stored in the water heater body. In some cases, the handle of the liquid container was located outside the water heater main body and became the handle of the water heater.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In Japanese Patent No. 7108 and JP-A-5-115372, the temperature of the liquid is detected and displayed on the display unit (the open / closed state of the lid is notified) only when the power is being supplied from the power source. If the temperature of the liquid or the lid is open, the temperature of the liquid will not drop suddenly even if the power is disconnected and the power is turned off. If you touch it, you risk getting burned.

Further, in the case of Japanese Patent Laid-Open No. 5-103723, if the water heater is lifted by holding the handle without knowing that the lid is open, only the liquid container is lifted, and the water heater main body is It was very dangerous because it could become unstable and the water heater could fall down.

The electric water heater of the present invention has been made in view of the above-mentioned problems. When the electric power is not supplied from the power supply, the auxiliary power supply supplies the electric power to the temperature sensor to detect the temperature. The purpose of this is to notify the user that the liquid in the liquid container is dangerous at high temperatures and prevent the risk of burns and the like.

[0008]

In order to achieve the above object, an electric water heater according to the present invention comprises a liquid container for containing a liquid, a lid for covering an opening of the liquid container, and an inside of the liquid container. Heating means for heating the liquid, a temperature sensor for detecting the temperature of the liquid in the liquid container, and a control means for controlling energization to the heating means according to the temperature detected by the temperature sensor,
A power supply unit for supplying power to the control unit and the heating unit, an auxiliary power supply for supplying power to the control unit when there is no power supply from the power supply unit, and a power supply from the power supply unit. There is provided an informing means for informing the temperature detected by the temperature sensor by supplying power from the auxiliary power source when there is no energization.

In the vicinity of the temperature sensor, there is provided a temperature switch which is turned off when the temperature becomes lower than a predetermined temperature and shuts off the power supply from the auxiliary power supply to the notification means.

Further, a liquid container which is detachably provided in the water heater main body and which contains the liquid, a lid which covers the opening of the liquid container, and a heating means for heating the liquid in the liquid container.
A temperature sensor for detecting the temperature of the liquid in the liquid container,
A non-energized device that includes a control unit that controls energization to the heating unit according to the temperature detected by the temperature sensor, and a power supply unit that supplies power to the control unit and the heating unit, without power supply from the power supply unit. Sometimes an auxiliary power source for supplying power to the control means is provided, the liquid container is housed in the water heater main body above the liquid container, and the handle is located outside the water heater main body with the lid closed. And a lid switch that is turned on when the lid is open, and an informing unit that informs that the lid is open when the lid switch is turned on.

[0011]

In the electric water heater having the above structure, the temperature of the liquid in the liquid container is informed by the informing means when the power is not supplied from the power supply section and the liquid container is inadvertently touched by the user to cause burns or the like. I am informed that I am at risk of being injured. Then, when the liquid temperature in the liquid container becomes equal to or lower than a predetermined temperature, the power supply to the notification means is cut off to prevent unnecessary consumption of the auxiliary power supply.

[0012] Further, when the power is not supplied from the power source, the opening / closing of the lid is detected when the power is not supplied to inform that the lid is open, and the handle is inadvertently lifted to raise the water heater. It prevents the body from falling.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the electric water heater of the present invention will be described with reference to FIGS. The electric water heater of the present invention, a liquid container for containing a liquid, a lid for covering the opening of the liquid container,
Heating means for heating the liquid in the liquid container, a temperature sensor for detecting the temperature of the liquid in the liquid container, a control means for controlling the energization to the heating means according to the temperature detected by the temperature sensor, 1, a heating circuit 1 as a heating means is a means for heating a liquid container containing a liquid, and specifically, a heater, It is composed of relays. The microcomputer 2 (hereinafter abbreviated as the microcomputer 2) inputs the temperature detected by the temperature sensor 3, outputs a control signal to the control circuit 4, and controls the energization of the heater of the heating circuit 1 to boil water. . The power supply circuit 5 rectifies and smoothes the AC voltage when energized, and drives the microcomputer 2 with a DC voltage V _DD1
[V] is generated.

FIG. 2 shows a backup circuit 6 having an auxiliary power source, in which a battery 7a which is an auxiliary power source is connected in series with a resistor 7 and a diode 8, and a DC voltage V _DD2 [V] (V _DD1 > V
_DD2 ) is generated. At the time of energization, a reverse voltage is applied to the diode 8 by the DC voltage V _DD1 from the power supply circuit 5 and V _DD2 from the battery 6 and the diode 8 becomes non-conductive, so that the microcomputer 2 is applied with V _DD1 and operates. When the power is not supplied, the voltage supplied from the power supply circuit 5 becomes 0 [V], so that the voltage V _DD2 of the battery 6 causes the diode 8 to conduct, and V _DD2 is applied to the microcomputer 2 to operate. The resistor 7 is for current limiting.

The operation of the above configuration will be described.
The battery 6 supplies power to the microcomputer 2 through the resistor 7 and the diode 8. At this time, if the microcomputer 2 stores that the temperature detected by the temperature sensor 3 is high during energization, the display unit 9 indicates that it is dangerous.
Display with. This display unit 9 has low power consumption and is easy to understand,
Moreover, a liquid crystal display is preferable as an element that can be driven by the microcomputer 2, and the display on the display unit 9 may be a direct display of the temperature of the liquid or a character or picture display indicating that the temperature is high.

As shown in FIG. 3, a temperature switch 10 (thermo switch or the like), a resistor 11 and a diode 12 arranged in the vicinity of the temperature sensor 3 are connected in series to the battery 6 so that the liquid temperature is below a predetermined temperature. Then the temperature switch 1
When 0 is turned off, the power to the display unit 9 is cut off.

In such a structure, the power source of the battery 6 may or may not be supplied to the microcomputer 2 by the temperature switch 10. Fig. 4 shows the temperature detected by the temperature switch 10
The relationship between N and OFF is shown. The temperature switch 10 is ON when the detected temperature is higher than a predetermined temperature, and O when the detected temperature is lower than the predetermined temperature.
FF. The solid line a in FIG. 4 indicates that the temperature switch 10 is ON or O.
The FF state is shown, and the broken line b shows the temperature of the liquid. Since the temperature switch 10 is inserted in series with the battery 6, when the temperature of the liquid is higher than a predetermined temperature, power is supplied to the microcomputer 2 and the display section 9 performs legal actions.
When the temperature becomes lower than a predetermined temperature, the temperature switch 10 is turned off, the power supply to the microcomputer 2 is cut off, and the display on the display unit 9 is turned off.
The power consumption of the battery 6 is suppressed.

A second embodiment of the present invention will be described with reference to FIG. 5. An electric water heater according to the present invention is a liquid container that is detachably provided in a water heater body and holds a liquid, and the liquid container. To the heating means for heating the liquid in the liquid container, a temperature sensor for detecting the temperature of the liquid in the liquid container, and the heating means depending on the temperature detected by the temperature sensor. Control means for controlling energization of the
A power switch for supplying power to the heating means, and a lid switch 13 for detecting opening and closing of the lid of the battery 6, a resistor 14,
The diode 15 is connected in series, and the lid switch 13 is turned on when the lid is opened.

With such a structure, the lid switch 1 shown in FIG.
3 and the open / closed state of the lid body (solid line a indicates the open / closed state of the lid body, broken line b indicates that the lid switch 13 is ON,
OFF is shown. ), If the cover is closed, the cover switch 13 is turned off, the microcomputer 2 is not supplied with power, and the display 9 is not displayed. Then, when the lid is open, the lid switch 13 is turned on to supply power to the microcomputer 2, and the display 9 indicates that the lid is open, and does not lift the water heater by holding the handle of the liquid container. To inform the user.

[0020]

Since the electric water heater of the present invention has the above-mentioned structure, the temperature of the liquid in the liquid container is informed by the informing means when the power is not supplied from the power source and the liquid is not carelessly supplied. Knowing that there is a risk of burns to the user when touching the liquid container, we prevent burns. Then, when the liquid temperature in the liquid container becomes equal to or lower than a predetermined temperature, the power supply to the notification means is cut off to prevent unnecessary consumption of the auxiliary power supply. In addition, when there is no power supply from the power supply unit, the opening and closing of the lid is detected when there is no power supply, and the fact that the lid is open is notified, and carelessly holding the handle to lift the water heater and the water heater body falls down. Are prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electric water heater of the present invention.

FIG. 2 is a schematic electric circuit diagram showing a backup circuit of the first embodiment of the electric water heater of the present invention.

FIG. 3 is a schematic electric circuit diagram showing another embodiment of the backup circuit of the first embodiment of the electric water heater of the present invention.

4 is a temperature switch operation explanatory diagram showing the relationship between the ON / OFF state of the temperature switch of FIG. 3 and the temperature of the liquid.

FIG. 5 is a schematic electric circuit diagram showing a backup circuit of a second embodiment of the electric water heater of the present invention.

FIG. 6 is an explanatory diagram of a lid switch operation showing a relationship between an ON / OFF state of the lid switch of FIG. 5 and a liquid temperature.

[Explanation of symbols]

 1 Heating Circuit 2 Microcomputer 3 Temperature Sensor 4 Control Circuit 5 Power Supply Circuit 6 Battery 9 Display

Claims (3)

[Claims] 1. A liquid container for containing a liquid, a lid for covering an opening of the liquid container, a heating means for heating the liquid in the liquid container, and a temperature for detecting the temperature of the liquid in the liquid container. An electric water heater comprising: a sensor; a control unit that controls energization to the heating unit in accordance with the temperature detected by the temperature sensor; and a power supply unit that supplies power to the control unit and the heating unit. Temperature of the temperature sensor detected by the auxiliary power supply that supplies power to the control means when there is no power supply from the power supply section and the power supply from the auxiliary power supply when there is no power supply from the power supply section An electric water heater characterized by being provided with a notifying means for notifying. 2. The electric switch according to claim 1, further comprising a temperature switch near the temperature sensor, the temperature switch being turned off when the temperature becomes lower than a predetermined temperature to shut off the power supply from the auxiliary power supply to the notification means. Water heater. 3. A liquid container, which is detachably provided in the water heater body, for containing the liquid, a lid for covering the opening of the liquid container, a heating means for heating the liquid in the liquid container, A temperature sensor for detecting the temperature of the liquid in the liquid container, a control means for controlling the energization of the heating means in accordance with the temperature detected by the temperature sensor, and a power supply section for supplying power to the control means and the heating means. In an electric water heater provided with, an auxiliary power source for supplying power to the control means when no power is supplied from the power source section is provided, and the liquid container is attached to the main body of the water container above the liquid container. A handle located outside the water heater body is provided in the closed state of the lid body, and a lid switch that is turned on when the lid body is opened is provided, and the lid body is opened by turning on the lid switch. It is characterized by providing an informing means for informing that Electric water heater.