JPS614196A - Heat controller of composite heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heating control device for a composite heating device having a range function using microwaves and an open function using a heater.

[Conventional technology]

According to this type of composite heating device, the microwave function uses a sensor that detects gas or humidity generated from the food, and a microcomputer is activated based on the output signal of this sensor to automatically control the heating time. However, for the open function, the cooking time and temperature according to the type of food are stored in advance in the microcomputer.

The food is automatically cooked at a predetermined temperature and time by manually selecting a key corresponding to the cooking menu by the user. In other words, the control method using a sensor has the advantage that the sensor detects the cooking state of the food and automatically ends the heating without setting the heating time.
In the open function, leftover food residue that adheres to the heater or heating chamber during cooking is heated and generates gas, and it is difficult to distinguish this gas from the gas generated by the actual food, so one type of sensor is required. There was a problem that automatic cooking could not be applied as is.

[Summary of the invention] The present invention eliminates these conventional drawbacks.

The present invention aims to provide a heating control device for a composite heating device that enables automatic cooking based on sensor output No. 8 even when an oven function is used.

[Embodiments of the invention]

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

That is, FIG. 1 is an overall configuration diagram, in which electric heaters +21 to +31 and a magnetron (4) that generates microwaves are arranged above and below the heating chamber (11), and there is also a heating chamber (1). A gas sensor or a humidity sensor (5) whose impedance changes depending on the gas concentration or humidity generated from food during cooking is arranged in the exhaust path.The gas concentration detection section (6) is equipped with a sensor X5. )
The output signal of the sensor is detected as a voltage change and converted, and the gas concentration calculation section (7) calculates a change in the sensor output signal from the detection signal. Furthermore, the time counter (8) counts the time from the start of cooking.

-Memory that stores predetermined output changes in advance (
9) and the calculated level change, the cooking time (T2) is calculated by the T2 calculation unit 0I. and.

It controls the energization of heater +2+ +31 and magnetron (4).

Figure 2 is a configuration diagram of the main body of the composite heating and cooking material. This is the operation panel.

FIG. 3 is a circuit configuration diagram, α& is a microcomputer in the control device, and is a CPU (19, memory <9).

It has built-in A/D conversion with 3 human power and 1 (c). (C) is the load resistance of the sensor (5), and at the same time, the potential detection resistance of the ~phrase conversion input, @ is the thermistor, which is used to control the temperature of the heating chamber. 2 is the load resistance of the thermistor, and at the same time is the potential detection resistance of the A/D conversion input. @ is the power supply transformer for driving the magnetron, +21 (31 is the heater in the heating chamber, C (3 is the relay contact driven by the load control output, which distributes the specified power to the two heaters (2+ 131). A relay contact driven by the load control output (magnetro).
・Distribute the power between the I chisel power and the heater.

-1 is a relay contact driven by the load control output (c), which closes the main circuit at the same time as the cooking start signal, and the calculated time T
This is a timed contact that is opened at the transition edge of 2.

Next, the operation of the above embodiment is shown in Fig. 4. This will be explained with reference to FIG. Fig. 4 is a flowchart showing the processing method for the gas sensor output stored in the microcomputer's memory (91), and Fig. 5 is a detailed explanatory diagram of the signal processing. A group of keys
After selecting the 8-cost menu from e, go to the same group e
When you press the “Start” key, the ON signal causes the 4th
Alternate heating of the magnetron and heater shown in the figure begins. The magnetron is shown in Figure 5.

The heater is run for 5 seconds prior to energization, and the heater is energized for 55 seconds following the magnetron.

Changes in the gas sensor (5) progress as changes in the potential detection resistor (4) as shown in Figure 5. The microcomputer processes this voltage every 0.5 seconds.The O processing means successively calculates the potential change α every 0.5 seconds. On the other hand, as food 1 progresses in heating.

As starch and proteins change, components that are sensitive to the gas sensor gradually accumulate on the surface of the food.In this way, when the food reaches the final stage of cooking, a large amount of components that are sensitive to the gas sensor accumulates. When microwaves reach the place where the food is stored, the inside of the food is rapidly heated.Water vapor,
#A large amount of reaction gas etc. will be spewed out. In other words, the peak output of the sensor (51) appears after microwave irradiation.The sensor potential continues to be processed until this peak output exceeds a certain change A stored in the memory @ depending on the type of menu.α〉A First, set the time when the food becomes T1 depending on the type and amount of food.

Since the manner in which T1 is reached is determined, first-order processing becomes possible. In other words, the time to reach +Ti is shorter if the quantity is smaller, and the total heating time is also shorter than when the quantity is large, so the time from T1 to the end of cooking can be treated as a function of TI. Therefore, the following relationship holds true: total cooking time: T2 − TI +K(TI)XT1. K(T1) is of course stored in the memory of the microcomputer in correspondence with the type of menu. Thereafter, when one hour T2 has elapsed since the start of cooking, the microcomputer Nishiki outputs a stop signal, the relay contact opens, and the cooking ends. Above α
, regarding A.

It has been found that a value of approximately α-0,04,A,=(1,i) can usually accommodate a considerable variety of menus.

In the above embodiment, the oven function was explained using an electric heater, but it goes without saying that the present invention can be applied in the same manner to an oven using gas as a heating means.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to make the detection means using a sensor function effectively even when using the oven function, and it is possible to realize automation of the oven function.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a composite heating device showing an embodiment of the present invention, Fig. 2 is a configuration diagram of the main body, Fig. 3 is a circuit configuration diagram thereof, and Fig. 4 is a flowchart showing its operation. , Figure 5 is a diagram showing changes in sensor output, and Figure 6 is a detailed explanation of Figure 5. In the figure: (1) C heating chamber, (21 (31 is a heater, (4) is a magnetron) (5) is a gas sensor.

Claims (1)

[Claims] A heating chamber, a first heating means consisting of a microwave generator that heats the food in the heating chamber, a second heating means also consisting of a heater, a sensor that detects gas or humidity generated from the food, and and a control means for controlling the heating time of the first or second heating means based on the output signal of the sensor, and by periodically operating the first heating means during heating by the second heating means. A heating control device for a composite heating device, characterized in that the heating control means is driven.