JPS5899623A - High frequency heating device - Google Patents

Abstract

PURPOSE:To speed up a speed cooking by the high frequency heating device and to provide a good dish with a good appearance by a method wherein the temperature of food is detected at both the center part and surface part by a single probe, and the output of the high frequency heating device is controlled based on the detection results. CONSTITUTION:The high frequency heating device comprises a heating chamber 12 for housing food 20, a high frequency oscillator to supply high frequency into the heating chamber 12, the sensor probe 1 to detect the temperature of the food 20 and a control circuit including a microcomputer to control the high frequency oscillator based on the detection signal of the sensor probe 1. The sensor probe 1 is attached at different points with two heat sensing elements 2 and 3 and a difference temperature detected by the two elements 2 and 3 is used to control the output of the high frequency oscillator. As a result of this, the speed cooking by the high frequency heating device is further speeded-up, and a good dish with a good appearance can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency heating device such as a microwave oven.

A conventional high-frequency heating device incorporates one sensor probe (hereinafter referred to as a globe), and the tip of the probe has a temperature sensing part such as a thermistor, and the probe is inserted into the center of roast beef, etc. Cooking will automatically complete when the temperature sensor reaches the set temperature.

Alternatively, with devices that use a microcomputer, etc., when the first set temperature is reached, the output is changed to heat the food to the second set temperature, and cooking is completed when the food temperature reaches the second set temperature. There is also.

In the high-frequency heating device with the above structure, the temperature of the center of the roast beef controls the doneness of the cooking, but the doneness of the surface area is ignored, resulting in overheating and the surface becoming burnt and carbonized. .

As shown in Figure 1A, when heated at high power, the surface becomes burnt even though the center is raw. On the other hand, heating at a low output produces a finished product with a small temperature difference between the surface and the center, as shown in Figure B, but the time required for heating is long. 1st
In figures A and B, K is the burnt part and W is the well-done part 1M.
indicates a medium 3t"-7 part, R indicates a layer part, and N indicates a raw part, respectively.

If you try to prevent overheating of the surface area in this way, you can reduce the output and cook by using carryover heating (meaning the temperature is leveled out by heat conduction), but it will require a longer time than necessary. . In addition, since the optimal conditions change depending on the size of the meat, even if the meat can be prepared in a short time, it must be heated at low power for a long time, making shortening the time an issue.

The purpose of the present invention is to use a sensor probe in a high-frequency heating device to control the heating state (finished state) of food.It is an object of the present invention to further speed up the speed of cooking using a high-frequency heating device, and to produce delicious food with good appearance. Can be cooked.
The present invention provides a high-frequency heating device with high performance.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a probe having a first heat sensitive element 2 and a second heat sensitive element 3 provided in an insertion portion 4. As shown in FIG.

6 is a green knob for inserting the probe 1 into food such as meat, and 6 is a 3-core shielded wire consisting of a shielded wire.

A plug 7 sends a signal to the control device, and a surface 8 of the plug 7 is grounded. The end portion 9 and the tip portion 10 which are still connected to the surface 8 are the first heat-sensitive element 2 and the second heat-sensitive element 3, respectively.
is electrically connected to.

It has been found that it is reasonable to set the distance (dimension a) between the first and second heat-sensitive elements to about 40 degrees. Theoretically, it is possible to achieve finer heating control by increasing the number of heat-sensitive elements such as thermistors, but this is not as effective as the structure of the control device and probe becomes complicated. The case of two is reasonable in terms of cost performance.

In FIG. 3, a high frequency heating device according to an embodiment of the present invention is shown, 12 is an open chamber, 13 is a socket for the probe 1, 14 is a display section for displaying time or temperature, etc.;
1 indicates a numeric key, and 16 indicates a function key, which are used to set the high frequency output and the temperature of the probe 1. Reference numeral 17 is a finished state key, which can be selected from three stages, for example, from browned W (well-done) to semi-cooked R (layered). The 1st is the star 6'/one key, and the 19 is the stop or reset key.

The operation of this device with the above configuration will be explained. Now, insert the meat probe 1 into the food 20 and open the refrigerator 12.
The plug 7 of the probe 1 is set (inserted) into the socket 13 in the open chamber 12. Door (not shown)
Close the control section, press key 16 Temp 3
Select one of the two completion keys 17 and start key 18
Press. For example, the following program is preloaded into the microcomputer provided in the control device of this device. The initial center temperature (1 o'c) and surface temperature (10"C) of the food are memorized, and when the surface temperature rises by T1 (30)"C due to heating, the output of a high frequency oscillator (not shown) is from high output (700W) to low output (
300W), and further lowered the center temperature to T2″C (sσC
) or above and the surface temperature rises within 73(so)'C, apply high power (700W) again and the surface temperature rises to T4.
(50) "High-frequency oscillation is stopped when the temperature rises above C." Automatic cooking is performed by such a program that is pre-installed in the microcomputer.

As described above, the core temperature and the surface temperature are detected by one probe, and the high frequency output is controlled based on the situation of both temperatures, so the whole food is heated evenly and has a very nice appearance. Can provide good cooking heat.

The above-mentioned output control program based on the temperature difference J between the center temperature and the surface area or the temperature difference J between the center temperature and the surface area at a certain level is just an example, and by increasing the types of finished keys, detailed programs can be created. It is possible to automatically cook complex dishes with good results.

As described above, according to the present invention, the temperature of the center and surface of the food is detected with one probe without complicating the conventional configuration, and the high frequency output is controlled, resulting in a very uniform finish and a good appearance. It is possible to provide a high-frequency heating device that has good performance and is easy to use.

7'＼-・

[Brief explanation of the drawing]

1A and 1B are cross-sectional views showing the finished state of food in a conventional high-frequency heating device, FIG. 2 is an external perspective view showing the sensor probe of the high-frequency heating device of the present invention, and FIG. 3 is a main part of the device. FIG. 1... Sensor probe, 2... First heat sensitive element, 3... Second heat sensitive element, 12... Open warehouse (heating chamber). Name of agent: Patent attorney Toshio Nakao and one other person Published in 1982! l19G23(3)

Claims (2)

[Claims] (1) A heating chamber that stores food, a high-frequency oscillator that supplies high-frequency power into the heating chamber, a sensor probe that detects the temperature of the food, and a microcomputer that controls the high-frequency oscillator using a detection signal from the sensor probe. A high-frequency heating device comprising a control circuit including a control circuit, wherein the sensor probe has two heat-sensitive elements provided at different positions, and the output of the high-frequency oscillator is controlled based on the temperature difference detected by the sensor probe. (2) The high-frequency heating device according to claim 1, wherein the distance between the heat-sensitive elements provided in the sensor probe is 40 m or more.