JPH0237077B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a deep fryer for an electromagnetic cooker for general household use.

Conventional configurations and their problems Conventionally, when cooking tempura with an electromagnetic cooker, there is a type that adjusts the oil temperature by installing a sensor such as a thermistor on the underside of the top plate, but since it does not directly detect the oil temperature, The drawback was that the temperature control accuracy was poor. A method has also been proposed in which the sensor is inserted into the container using a cord from the cooker itself, but it is inconvenient to store the cord and attach it to the container, and the oil temperature may rise abnormally if the cord is not attached correctly. It has the following disadvantages.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and provides a deep fryer with high temperature control accuracy and high safety.

Structure of the Invention The deep fryer for an electromagnetic cooker of the present invention includes a casing composed of a non-metallic outer shell and a metal container housed in the outer shell; a first coil that induces an alternating current high frequency voltage by a high frequency magnetic field from the heating coil;
a power supply device configured to obtain DC power from both ends of the coil; an electronic thermostat driven by the power supply device to detect oil temperature in the container; and an AC high frequency voltage supplied from the first coil. and a second coil for inductively heating the container, and the electronic thermostat is configured to adjust the power supply to the second coil according to the oil temperature. When you place a pot on an induction cooktop and operate the cooker's heating coil,
An electronic thermostat is operated from the first coil via the power supply, and the temperature of the oil in the container is controlled with high accuracy and good thermal response.

DESCRIPTION OF EMBODIMENTS In FIG. 1, 1 is a non-metallic outer shell;
Reference numeral 2 denotes a metal container housed inside the outer shell 1. A first coil 3 is provided at the inner bottom of the outer shell 1, and a high frequency voltage is induced by a high frequency magnetic field from a heating coil of an electromagnetic cooker. An electrically insulating magnetic material (ferrite core) 4 is provided on the top of this coil 3,
A second coil 5 is provided at the outer bottom and outside of the container 2 .

Furthermore, a sensor support 7 is attached to the inner lower part of the container 2. 6 is an electronic thermostat consisting of an electronic circuit, and 8 is a knob for controlling the temperature. FIG. 2 shows an electrical wiring diagram, and the parts corresponding to the electronic thermostat described above are indicated by symbols 10 to 14. 9 is a DC power supply device consisting of a resistor, a diode, and a capacitor, which includes a thermistor 1 attached to the sensor support 7;
0 and a transistor circuit 12 whose inputs are a variable resistor 11 for temperature adjustment operated by a knob 8.
(details not shown) and is used to drive the relay 13. Relay contact 14 is connected between first coil 3 and second coil 5.
15 is a temperature fuse.

When the deep fryer with the above configuration is placed on the top plate of an electromagnetic cooker so that the first coil 3 faces the heating coil of the electromagnetic cooker and the electromagnetic cooker is operated, the first coil 3 receives AC high frequency. A voltage is induced. This voltage causes the power supply device 9 to generate a DC voltage, and when the oil temperature is lower than the temperature set by the temperature control knob 8, the relay coil 13 is energized, the contact 14 is closed, and the second coil 5 is activated. The container 2 is excited and heated using the principle of induction heating, raising the temperature of the oil in the container. When the oil temperature becomes higher than the set value, the contact 14 is opened to de-energize the second coil 5 and stop the heating operation. This operation is repeated to maintain the oil temperature at a predetermined temperature. Here, the magnetic body 4 is provided to improve the coupling between the first coil 3 and the heating coil of the electromagnetic cooker.

As is well known, electronic thermostats have a small sensor heat capacity and a short operating range (ON-OFF).
Since it can be designed to be arbitrarily small, it is possible to obtain temperature control with lower temperature accuracy and temperature ripple compared to a mechanical type such as a liquid expansion type. However, unlike mechanical types that use the thermal energy of the controlled object for their operation, electronic types require a separately prepared power supply. A power supply device is provided that utilizes a portion of the energy of
There is no need to install a new power cord.

Effects of the Invention As is clear from the above embodiments, according to the present invention, instead of directly heating the container with the electromagnetic cooker, the first coil receives electrical energy from the electromagnetic cooker, and the electric energy is An electronic thermostat driven by energy is provided, and the thermostat is configured to control the energization of the second coil provided to heat the container, so as mentioned above, the temperature accuracy is good. The temperature ripple is small, and when a large amount of food is put in, it responds rapidly to the drop in oil temperature and does not have a negative effect on the finish of the cooking, and since the sensor is fixed, it is easy to attach the sensor. It is possible to provide a deep fryer that does not cause an abnormal rise in oil temperature due to forgetfulness or an unstable device, is therefore excellent in safety, and is cordless and easy to use.

In the embodiment, the electronic thermostat uses the relay coil 13 and the contacts 14 to control the energization of the second coil 5, but a semiconductor element may be used instead. If the distance between the first coil 3 and the second coil 5 is made sufficiently wide, the magnetic body 4 becomes unnecessary.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of the present invention, and FIG. 2 is an electrical wiring diagram thereof. 1... Non-metallic outer shell, 2... Metallic container, 3
...First coil, 5...Second coil, 9...
Power supply device, 10, 11, 12, 13, 14... electronic thermostat.

Claims (1)

[Claims] 1 A casing consisting of a non-metallic outer shell and a metallic container inside the outer shell, and a casing arranged at the inner bottom of the outer shell, which induces an AC high-frequency voltage by a high-frequency magnetic field from a heating coil of an electromagnetic cooker. a first coil for controlling the temperature of the oil; a power supply device configured to obtain DC power from both ends of the first coil; an electronic thermostat that is driven by the power supply device and detects the oil temperature in the container; A second coil is supplied with an AC high frequency voltage from a first coil and heats the container by induction.
A deep fryer for an electromagnetic cooker, comprising: a coil; wherein the electronic thermostat adjusts power supply to the second coil according to oil temperature.