JPH0455048B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric water heater for heating and keeping a stored liquid warm.

Conventional technology A conventional electric water heater of this type was developed in 1983, for example.
It is configured as shown in the -190128 publication.

That is, as shown in FIG. 5, on the body 101,
A container 103 equipped with a heating element 102 is housed, and a pumping pipe 105 connects the bottom of the container 103 to a discharge port 104, and the liquid inside the container 103 is discharged by pump operation of a lid 106 provided on the top surface of the body 101. An overflow prevention valve 1 which is discharged from a pipe 107 and is installed in the middle of the pumping pipe when the vessel overturns.
08, it was configured to be in a sealed state to prevent the contents from leaking out of the container.

Problems to be Solved by the Invention With such a conventional configuration, there is no particular problem if the water is kept at a stable temperature after boiling, but if the water falls during boiling, or if electricity is turned on while the water is being turned over, the water will boil in an airtight state, causing the contents to deteriorate. The internal pressure increases due to thermal expansion of the liquid and air, causing hot water to splash out from between the container body and the lid 106, or in some cases, the lid 106 may come off and the liquid inside spills out, which is extremely dangerous. Ta.

In addition, if the container is used with the container tilted as shown in Figure 6, if there is a large amount of liquid in the container, the liquid will expand as the temperature of the boiler increases and may overflow from the discharge pipe 107, or may overflow due to the water surface dancing during boiling. It was also extremely dangerous. The present invention takes these problems into consideration and aims to provide an electric water heater that turns off the power to the heating element when the appliance falls or tilts to ensure safety.

Means for Solving the Problems In order to solve the above problems, there is provided a container housed in a container, a heating element that heats the container, and a power supply to the heating element turned off when the container is tilted above a certain level. A movable ball is provided in a conical case having a constant angle of inclination with the lowest point at the center of the bottom surface of the case.
A ball detection device is arranged on the upper or lower center surface of the case.

Function: With this configuration, it is possible to detect when the vessel is tipped over or tilted, and to cut off the power to the heating element, so even if the power is turned on while the vessel is tipped over, there will be no boiling water gushing out or overflowing due to the lid coming off. It works in the same way and ensures safety even when the device is used in a tilted position.

Embodiment Hereinafter, an embodiment of the present invention will be described in FIGS. 1 to 4.
This will be explained with reference to the figures.

In the figure, reference numeral 1 denotes a cylindrical body, and a spout 2 made of synthetic resin is attached to the upper end of the body 1.
Reference numeral 3 denotes a synthetic resin lid mounted on the top of the spout 2, and the lid 3 and the spout 2 are rotatably and removably attached by means of an engagement pin 4 provided at the rear. 5
The container is made of stainless steel, and the outer bottom has a heating element 6 that integrates a main heating element for boiling water and an auxiliary heating element for keeping warm, a thermostat 7 that controls the main heating element, and a thermal lead that controls the auxiliary heater. Switch 8 is tightly fixed. Further, the thermal reed switch 8 is integrally provided with a temperature fuse 9.

Reference numeral 10 denotes a pumping pipe that guides the liquid content out of the container by operating a pump inside the lid 3, and has an upper end connected to a discharge port 11 projecting outside the container, and a lower end connected to the container 5 through an elbow 12. Further, a valve case 14 is provided above the water surface of the water pump 10 to accommodate an overflow prevention valve 13.

15 is a tilt detection device, which is transparent and has a conical bottom, as well as a lower case 16 that is transparent and has a conical bottom.
A light emitting diode 18 and a phototransistor 19 are provided on the upper case 17 corresponding to the upper case 17 and on the upper and lower outer sides of the axis of both cases. A movable ball 20 is also provided inside the case.

Reference numeral 21 denotes a base that holds the tilt detection device 15.

With the above configuration, if the angle of the conical bottom of the lower case 16 is determined as the safe use angle of the container body as shown in Fig. 2, if the safety value a is exceeded, the inside of the case will be shown as shown in Fig. 3. The ball 20 moves to the end and the phototransistor 19 receives the light from the light emitting diode 18, thereby turning on the power to the heating element 7.
It is starting to be turned off.

FIG. 4 is the circuit diagram. When the device falls over or tilts at an angle of more than a, the ball 20 moves as described above, and when the phototransistor 19 receives the light from the light emitting diode 18, a current flows between B and A. flows.

Therefore, due to the voltage drop due to the resistor 21, B-E
As the potential between D and E decreases, no current flows between D and E, and the relay 22 is cut off, turning off the heating element 6 to ensure safety.

Note that although the explanation has been given here only with a configuration in which the heating element 6 is turned off, it goes without saying that the usability will be further improved if notification is provided by flashing a lamp or the like or by using a buzzer or the like.

Effects of the Invention As is clear from the above embodiments, the electric water heater of the present invention has the following excellent effects.

By setting the inclination angle of the conical case of the inclination detection device to the safe operating angle of the device, it activates only when the limit is exceeded in all directions, turns off the electricity to the heating element, and prevents hot water from flowing from the outlet. This prevents water from overflowing, burns, and stains on the floor and table.

In addition, it is extremely reliable, as it can reliably turn off the power to the heating element in case of dangerous quick movement or shaking during boiling, and will not malfunction even when the table is slightly tilted during normal use. An electric water heater with a safety mechanism can be provided.

It has the above-mentioned effects, and its industrial value is extremely great.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electric water heater showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the same tilt detector.
Figure 3 is an enlarged cross-sectional view of the tilt detector at the operating angle, Figure 4 is the circuit diagram, Figure 5 is a cross-sectional view of a conventional electric water heater, and Figure 6 is the state when the device is used at an angle. FIG. 1...Body, 5...Container, 15...Lower case, 16...Upper case, 17...Light emitting diode, 18...Phototransistor, 19...Ball.

Claims (1)

[Claims] 1 A container housed in a container body, a heating element that heats the container, and an inclination detection device that turns off electricity to the heating element when the container body is tilted above a certain level, and the inclination detection device An electric water heater comprising a movable ball provided in a conical case having a constant angle of inclination with the lowest point at the center, and a ball detection device disposed on the upper or lower surface of the center of the case.