JPS5912931B2 - High frequency heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an output switching device for a high-frequency heating device, a so-called microwave oven, and its purpose is to automatically switch from high heat to low heat.

A conventional microwave oven equipped with a high-frequency output strength switching device has one cooking time setting scale (timer pointer or pack timer pointer), which is matched with the cooking time setting scale.

Therefore, in order to switch the high frequency output during cooking, it is necessary to switch the output manually during the cooking process, which is extremely troublesome, and it has become common for cooking to be done without switching the high frequency output. The range of food that can be cooked was narrowed down. For example, when cooking rice, which is a typical Japanese food preparation, the heat must be high until it starts to bubble, then the heat must be lowered to a low simmer.

Therefore, it was conventionally thought that it was difficult to cook rice in a microwave oven. 5. When cooking Koya tofu, you can cook it over high heat at first, bring it to a boil, then lower the heat to make it softer and more delicious.

The same goes for soybean farming. Furthermore, in the case of egg dishes, if you first cook over high heat and then switch to low heat before it solidifies, the cooking time will be greatly shortened and the result will be the same as if you cooked it over low heat from the beginning.

In this way, by providing a device that initially sets the heat to high and then switches to low heat midway through, the cooking range of the microwave oven can be greatly expanded.

15 Therefore, the present invention solves the above-mentioned conventional drawbacks with a simple configuration, and one embodiment of the present invention will be described below with reference to the accompanying drawings.

First, in FIG. 1, 1 is a timer knob, 2 is a time scale plate, and 3 is a first pointer 0 for setting the cooking time, which is interlocked with the timer knob by a thread 4.

5 is a cooking time table knob that rotates the cooking time table 6.

T is a second pointer for setting a time for switching between strong and weak outputs, and 8 is a cooking switch button. Here, the cooking time setting pointer 3 is provided with a magnet 9, and the strong/weak switching time setting pointer T is provided with a reed switch 10 operated by a magnet. FIG. 2 is a circuit diagram embodying the above embodiment,
For example, if the cooking time setting pointer 3 is set to 20 minutes as shown in FIG. 1 by turning the timer knob 1, the 30 time switch 11 shown in FIG. 2 is turned on and connected to the power source s.

Taking 2 cups of soybeans as an example of cooking, it is assumed that the cooking can be done successfully by cooking for just over 7 minutes and just under 13 minutes, and the strength/weakness switching setting guideline 7 is set to 13 minutes. If you press the cooking button 8 here, the cooking switch 12 will turn on and the power relay 13 will turn on.
Then, the positive voltage transformer 14 is excited and the magnetron 15 is operated. At this time, capacitors Cl and C2 both operate and produce a high output. C, - Then, as the timer motor 16 rotates, when the time setting pointer 3 comes to the same position as the strong/weak switching time setting pointer 7, the reed switch 10 is operated by the magnet 9, the relay 17 is operated, and the high voltage changeover switch 18 is activated. is 0
It becomes an FF, the capacitor capacity becomes smaller, and the high frequency output is switched from strong to weak.

After that, the self-holding switch 16 built into the relay 17
It operates at low output until the pointer reaches O. In addition, if switching between strengths and weaknesses is not necessary in this circuit, use the strength switching setting guideline 7.
All you have to do is set it to O.

On the other hand, in the case of only low cooking, after turning on the power, set the strong/weak switching setting pointer 7 to a longer time than the cooking time setting pointer 3 and set the cooking time to only low. As explained above, according to the present invention, the following effects can be expected. 1. It is possible to cook rice, soybeans, etc., and the range of cooking can be greatly expanded.

2. The same effect as cooking eggs using only low power can be achieved in a short time.

3. The cost is reduced compared to when two timers are used, and the cooking scale plate, cooking table, etc. can be widely spaced on the operation panel, making it easy to use.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of a high-frequency heating device showing one embodiment of the present invention, and FIG. 2 is an electric circuit diagram of the same device. 1... Timer knob, 2... Time scale plate, 3... Pointer, 7... Strength switching time setting pointer, 8... Cooking Button, 9...
Magnet, 10... Reed switch.

Claims (1)

[Claims] 1 High frequency output strength switching device, time scale display board,
A first pointer that sets the cooking time and is driven by a timer, and a second pointer that sets the time for switching the high frequency output from strong to weak, and the first pointer passes near the second pointer. A high-frequency heating device characterized in that the intensity switching device is driven at times.