JPH0359560B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-frequency heating device with a ceiling fire, and relates to automatic control of heating cooking.

BACKGROUND OF THE INVENTION Generally, there are two types of cooking using an additional heat cooker: so-called oven cooking, and so-called grill cooking, which is cooking to brown the food. As shown in FIG. 6, only oven plate 1 is used during oven cooking.

On the other hand, when grilling, place the
By placing the foot-high slatted grid 2, placing the object to be heated 3 on top of it, and bringing the distance to the electric heater 4 closer,
This increases heating efficiency and browns the object to be heated 3.

On the other hand, the operation panel 5 includes a display tube 6 for displaying cooking time and type, a key 7 for selecting high frequency cooking,
There are a key 8 for selecting oven cooking, a key 9 for selecting grill cooking, and a cooking temperature setting volume 11 for inputting a time setting volume 10 and a control temperature of the heating chamber 12. Therefore, when cooking in the oven, the key 8 is selected and input, and then the cooking time and cooking temperature are set using the volumes 10 and 11. Further, in the case of grill cooking, the key 9 is selected and input. In addition,
In addition to the conventional example shown in FIG. 6, there is also one in which the height of the oven dish 1 is appropriately changed without using the foot-high grating 2.

Problems to be Solved by the Invention However, in the case of such a conventional high-frequency heating cooker with an overhead fire, the user must select and input whether to cook in the oven or on the grill.
In addition, the user must perform an operation to change the height of the oven tray, which creates a sense of complexity and annoyance for the user.

The present invention solves these conventional problems, and realizes simplification of operation, improvement of cooking performance, ensuring safety, and energy saving.

Means for Solving the Problems The high-frequency heating device with a skylight of the present invention includes a heating means arranged in the upper part of the heating chamber, a heating chamber partition plate that partitions the heating chamber into at least two upper and lower chambers, and a heating chamber partition plate that divides the heating chamber into at least two chambers, an upper and a lower chamber. a control unit that controls heating to the heating chamber based on the information from the temperature detection means, and a control unit that determines the presence or absence of the heating chamber partition plate based on the information from the temperature detection means. and a means for inputting the presence/absence information to the control section.

Function The high-frequency heating device with a ceiling fire of the present invention detects the temperature rise value based on the temperature information from the temperature detection means of the heating chamber, thereby identifying the presence or absence of the heating chamber partition plate, and the type of cooking. The system automatically changes the cooking pattern and conditions to the optimum value based on the knowledge.

Embodiment Hereinafter, a high-frequency heating device with a ceiling flame according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the heating chamber is divided into two spaces, an upper heating chamber 12a and a lower heating chamber 12b, by a heating chamber partition plate 14. A thermistor 15 attached to the heating chamber wall of the upper heating chamber 12a detects the atmospheric temperature within the heating chamber.

Now, let's talk about the operations when cooking on the grill. First, the heating chamber partition plate 14 is inserted into the heating chamber along the support rails 24 formed at the center of both side walls of the heating chamber. As a result, the heating chamber is separated into two, the above-mentioned upper heating chamber 12a and lower heating chamber 12b. Next, the object to be heated 3 is placed on the heating chamber partition plate 14 . Thereafter, the user presses the key 8 for selecting oven cooking on the operation panel 5, sets the cooking time using the cooking time setting volume 11, and then starts cooking. When cooking is started, the cooking time displayed on the display tube 8 is counted down in 1 second or 1 minute increments. Further, the electric heater 4 starts generating heat. FIG. 2 shows the change in the atmospheric temperature inside the heating chamber at this time. The graph shows the temperature change when the heating chamber partition plate 14 shown in FIG. 1 is present, and the graph shows the temperature change when the heating chamber partition plate 14 is not present. As shown in Figure 2, the time it takes for the atmospheric temperature in the heating chamber to reach 150°C is
It can be seen that it takes about 7 minutes when there is, and about 11 minutes when it does not. Therefore, the presence or absence of the heating chamber partition plate 14 can be determined based on the difference in the time required for the atmospheric temperature in the heating chamber to reach 150° C., and the cooking mode can be automatically identified.

From this, in the above-mentioned cooking, the ambient temperature in the heating chamber reached 150°C approximately 7 minutes after the start of cooking, so the control unit automatically determined that it was in the grill cooking mode with the heating chamber partition plate 14 installed. After that, the control temperature is automatically set to 250℃ and heating of the object is continued. Then, for a certain period of time after the ambient temperature reaches 250°C, cooking is carried out using a combination of high-frequency heating and electric heater heating.

FIG. 3 shows a block diagram of an example of the control circuit. The internal atmosphere detection thermistor 22 forms a voltage dividing circuit with a voltage dividing resistor 23, and inputs resistance changes according to temperature changes to the microcomputer 17 as a voltage signal. Microcomputer 1
7 has a built-in analog-to-digital conversion function and converts the input voltage signal into a constant digital signal. This digital signal is processed according to a processing procedure stored in advance, and determines the presence or absence of the heating chamber partition plate 14, and also determines and controls subsequent cooking patterns. 18 is a relay driver, and microcomputer 1
According to the signal 7, the electric heater relay 19,
Although not shown in the figure, it drives a high frequency oscillation control relay, etc. The display tube 21 and the key input device 20 are strobed by a strobe signal from the microcomputer 17 to perform time-division display and time-division input checking.

FIG. 4 shows a processing procedure program stored inside the microcomputer 17. That is, this is an example of a program in which, after starting cooking, it is determined whether or not there is a heating chamber partition plate, and the process is branched to each cooking mode. This program memorizes the cooking time until the ambient temperature reaches 150℃, and then, when the temperature reaches 150℃, calculates the value of the temperature increase from the start of cooking divided by the required time, and if the value is 20 or more. By comparing and determining whether the amount is greater than or less than 1, grill cooking or oven cooking is determined.

On the other hand, FIG. 5 shows an embodiment in which two thermistors are installed. In other words, the ambient temperature of the upper heating chamber 12a partitioned by the heating chamber partition plate is detected by the upper heating chamber thermistor 15a, and the ambient temperature of the lower heating chamber 12b is detected by the lower heating chamber thermistor 15b. That is.

An embodiment of the present application has been described above, but in the case of grill cooking using the heating chamber partition plate 14,
By detecting the difference in ambient temperature between the upper heating chamber and the lower heating chamber, it is possible to recognize the cooking mode and automatically execute cooking without setting the cooking temperature or time. Note that in the above description, parts necessary for high-frequency heating are not shown in the drawings.

Effects of the Invention As described above, according to the configuration of the present invention, the following effects can be obtained.

(1) The presence or absence of a heating chamber partition plate is automatically determined based on the magnitude of the change in temperature rise in the heating chamber temperature, and as a result, the cooking mode (oven cooking or grill cooking) is also identified, and the system You can also change the heating pattern for cooking. Therefore, at the setting operation stage, optimal grill cooking can be performed without the need for key operations and setting work for cooking conditions for grill cooking, and it is also possible to simplify the operation and reduce costs by omitting the setting operation means. It is something.

(2) The presence or absence of a heating chamber partition plate is determined by knowing the temperature change, and as a result, cooking conditions such as control temperature and control time are automatically adjusted, so there is no overheating, etc., and safety performance is improved. is measured.

(3) By installing a thermistor in each of the upper and lower heating chambers, it becomes possible to determine the presence or absence of a heating chamber partition plate with very high accuracy, making it possible to realize a heating device with even higher cooking performance.

[Brief explanation of drawings]

Fig. 1 is a front view showing the open fire additional heat system door in an embodiment of the present invention, Fig. 2 is a diagram showing an increase in the temperature inside the refrigerator, and Fig. 3 is a diagram showing the control unit of the same. FIG. 4 is a flowchart of the program processing procedure inside the control unit, FIG. 5 is a front view of another embodiment of the overhead heating device, and FIG. 6 is a diagram of a conventional high-frequency heating device with overhead heating device. It is a front view. 3...Object to be heated, 4...Electric heater, 12a...
...Upper heating chamber, 12b...Lower heating chamber, 14...
Heating chamber partition plate, 15...thermistor.

Claims (1)

[Scope of Claims] 1. A heating chamber for storing an object to be heated, means for heating the object provided above the heating chamber, and a heating chamber partition plate that partitions the heating chamber into at least two chambers, an upper and a lower chamber. and an atmospheric temperature detection means for the heating chamber; a control unit that controls power supply to the heating means based on information from the temperature detection means; What is claimed is: 1. A high-frequency heating device with a ceiling flame, comprising identification means for identifying the presence or absence of a partition plate, and having a heating pattern variable according to information on the presence or absence of the partition plate from the identification means. 2. The high-frequency heating device with a ceiling flame according to claim 1, wherein the heating chamber partition plate also serves as a table for placing an object to be heated. 3. The high-frequency heating device with a ceiling flame according to claim 1 or 2, characterized in that the atmospheric temperature detection means is configured to detect the atmospheric temperature of each of the two upper and lower chambers partitioned by a heating chamber partition plate. .