JPH0422565B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric hot water pot which obtains hot water by electromagnetic induction heating.

Structure of the conventional example and its problems When the conventional electric jar pot reaches a constant temperature, an electric heater supplies the amount of heat to maintain the constant temperature. This does not have the structure of a conventional vacuum double-bottomed thermos flask, but instead is simply made with a metal inner can, so if you do not supply enough heat to maintain a constant temperature, the temperature will drop rapidly. of electricity was required. Moreover, in the case where the heater is placed in water, the heater needs to be constructed in a watertight manner, which complicates the construction.

OBJECTS OF THE INVENTION The present invention solves these conventional drawbacks, and aims to provide an electric hot pot that has higher thermal efficiency than simple means and uses as little electric power as possible to keep warm.

Structure of the Invention The electric jar pot of the present invention has a conductive metal on the inner wall of the double vacuum bottle, a heating coil of an electromagnetic induction heating device outside the double vacuum bottle, and water inside the double vacuum bottle. A detection element and a water temperature detection element are provided, and the water detection element and water temperature detection element are connected to a control circuit that controls the energization of the heating coil. According to this configuration, a double vacuum bottle is used and an electromagnetic induction heating device is used. Since the water is heated with a simple structure, it is possible to increase the thermal efficiency during heating, and it also has the excellent effect of requiring less electricity to keep warm.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 is a lid of an electric jar pot, 2 is an outer case whose opening is closed by the lid 1, 3 is a vacuum double bottle provided inside the outer case 2, 4
is the water in the vacuum double bottle 3, 5 is the water detection element installed in the vacuum double bottle 3, 6 is the same water temperature detection element, 7
is a shiny conductive metal provided on the entire inner wall of the vacuum double bottle 3, and is made of aluminum foil pasted or metal vapor deposition or coating. 8 is a heating coil of an electromagnetic induction heating device provided directly below the outside of the double vacuum bottle 3; 9 is a control circuit for controlling the energization of the heating coil 8; 10 is a heat insulating material provided outside the double vacuum bottle 3; 11 1 is a drain port for discharging water by a pump action, and 12 is a power supply section.

Next, the operation will be explained with reference to the operation block diagram of FIG. When water is poured into the vacuum double bottle 3, the water detection element 5 is activated. Further, if the water temperature is lower than the set temperature, the water temperature detection element 6 is activated, and the logical sum of the water detection element 5 and the water mixture detection element 6 (that is, the vacuum double bottle 3
(When there is water inside and the water is lower than the set temperature)
and gives a signal to the control circuit 9 to energize the heating coil 8. The alternating magnetic field emitted from the heating coil 8 passes through the vacuum section of the double vacuum bottle 3 and heats the conductive metal 7 provided on the inner wall of the double vacuum bottle 3. Since this conductive metal 7 is in direct contact with water, the temperature of the conductive metal 7 is the boiling point of water (approximately 100℃).
Therefore, the conductive metal 7
Even if it is aluminum foil, aluminum foil will not burn. That is, the conductive metal 7 is heated with very high efficiency by the electromagnetic induction heating device, and the water also becomes high temperature accordingly (the thermal efficiency of power conversion at this time is higher than that of a normal heater). When the set temperature is reached, the water temperature detection element 6 operates and the heating coil 8 is de-energized. The heat of the high-temperature water in the double vacuum bottle 3 is prevented from being axially radiated by the metallic luster of the conductive metal 7 provided on the inner wall of the double vacuum bottle 3, and the vacuum of the double vacuum bottle 3 dissipates the heat. There is no need to drive the heating coil 8 in order to prevent heat conduction and maintain heat.
In addition, the control circuit 2 has a constant load (conductive metal 7) compared to the control circuit of a conventional induction heating cooker, and uses the water temperature detection element 6 and the water detection element 5, so it can be used as a small object detection circuit. There is no need for V _CE protection circuits, power converter circuits, etc., and it is very easy to use.

Effects of the Invention As described above, the electric jar pot of the present invention uses a double vacuum bottle and heats water with an electromagnetic induction heating device, so compared to the conventional electric jar pot, it has a simpler structure and can increase thermal efficiency during heating. This has the excellent effect of not only reducing the amount of electricity required for keeping warm, but also requiring less electricity.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electric jackpot showing an embodiment of the present invention, and FIG. 2 is an operational block diagram of the electric jackpot. 1... Lid, 3... Vacuum double bottle, 5... Water detection element, 6... Water temperature detection element, 7... Conductive metal,
8... Heating coil, 9... Control circuit.

Claims (1)

[Claims] 1. A conductive metal is provided on the inner wall of the vacuum double bottle, a heating coil of an electromagnetic induction heating device is installed outside the vacuum double bottle, and a water detection element and a water temperature detection element are installed inside the vacuum double bottle. The water detection element and water temperature detection element are electrical jacks connected to a control circuit that controls the energization of the heating coil.