JPS6361822A - Heating cooker - Google Patents

Abstract

PURPOSE:To improve the finishing of cooking, by a method wherein the microwave generating ratio of a magnetron is controlled gradually in accordance with the progress of the baking color of a food to be cooked when the heating cooking of the food to be cooked is effected by the simultaneous heating of a heating and the magnetron of a high-frequency oscillating circuit. CONSTITUTION:When the heating cooking of cake, for example, is effected in an oven 2, a cooking time and a heating temperature, which are necessary for the cooking of the cake, are set previously and, subsequently, the magnetron 7 and the heating heater 13 are conducted simultaneously. Then, the food to be cooked in the oven 2 is heated from the inside and the outside thereof. When a temperature in the oven 2 has arrived at the set temperature, a temperature sensor 15 detects it and the detecting signal thereof is transmitted to a controller 14, controlled by a microcomputer, while the controller 14 operates the contact 19 of a relay to control the microwave oscillating ratio of a high-frequency oscillating circuit 18 so as to be shortened. According to this operation, the controller 14 reduces the output of microwave gradually to maintain the tempera ture in the oven 2 at the set temperature. The cake, provided with proper baked color and inflation, may be cooked by heating in such a manner.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is directed to a method of heating a food to be cooked, such as a cake or grilled meat, by simultaneously using high-frequency heating and heater heating. The present invention relates to a cooking device, and particularly to a high-frequency oscillation control circuit for a magnetron in this cooking device.

(Prior Art) This type of heating cooking apparatus that has already been proposed is configured as shown in FIGS. 5 and 6.

That is, in FIGS. 5 and 6, an opening/closing door 1a and an operation panel 1b are provided on the front of a box-shaped case body (cabinet) 1, and an oven 2 and an operation panel 1b are provided in the case body 1. An oven frame 4 is provided which divides and forms the oven v3. Further, an excitation port 5 is bored in the top plate 4a of this A-bun frame 4, and this excitation port 5
A waveguide 6 is attached to the top plate 4a where is located.

Furthermore, a magnetron 7, which constitutes the main part of the high-frequency oscillation circuit, is attached to one end of the waveguide 6, and this magnetron 7 heats the food to be cooked in the oven 2 using high-frequency waves. ing.

On the other hand, a ring embankment 8 is formed on the bottom plate 4b of the oven frame 4, and a drive motor 9 is mounted on the back surface of the bottom plate 4b located at the center of the ring embankment 8 via a mounting member 10. The output shaft 9a of the drive motor 9 passes through the bottom plate 4b and projects into the oven 2, and a turntable 11 is attached to the output shaft 9a. It is detachably installed. A support ring 12 with rollers is interposed between the turntable 11 and the bottom plate 4b, and the support ring 12 with rollers holds the turntable 11 horizontally. Furthermore, ring-shaped heaters 13a and 13b are installed horizontally at the top and bottom of the oven 2, and these heaters 13a and 13b are attached to the turntable 11.
The food W to be cooked on the top is heated so that the outside can be seen.

Therefore, the heating cooking device described above places the food to be cooked W on the turntable 11 in the oven 2, and then selectively energizes the magnetron 7 or the heaters 13a, 13b to Turntable 11
The above food to be cooked W is heated in an oven or microwave.

On the other hand, for example, when cooking cake or grilled meat,
The necessary cooking time and heating temperature are set in advance, and then the magnetron 7 and the heaters 13a, 13b are heated.
By energizing both at the same time, the object W to be cooked can be heated from its inner and outer sides, and a cake or the like with proper browning and swelling can be cooked.

(Problems to be Solved by the Invention) However, the above-mentioned heating cooking device heats the object W to be cooked using high-frequency (microwave) heating using the magnetron 7, which allows the inside of the object to be seen, and heats the object to be cooked, W, by heating the object to be cooked while controlling the outside of the object. Due to the simultaneous heating with the radiant heat from the heaters 13a and 13b, the oscillation ratio (pulse) of the high frequency (microwave) from the magnetron 7 is constant, so for example, when cooking the object W such as a cake, The browning and internal swelling of the food to be cooked W are not constant even if the cooking temperature inside the food W increases and the heating temperature at which browning occurs occurs at the same time. It is difficult to finish the cooking of cakes and the like with good heat because the shape of the cake is damaged due to the fact that it is interposed in advance, and the color is not sufficiently browned, resulting in defects.

That is, when this is shown in the graph of FIG.
The temperature curves (■) of a and 13b and the temperature curve (■) caused by constant pulse high frequency waves from Magne 1 to Ron 7 are constant, and even if the internal temperature inside the oven 2 at this time becomes as shown by the curve (■), the There is a risk that the food W to be cooked may expand too much or burst and change its shape due to high-frequency heating.

Next, if this is shown in the graph of FIG. 7, the heater 13
The temperature curve of the temperature curve and the pulse controlled by the magnetron 7 O is constant, and at this time the temperature curve of the oven 2
The temperature inside the refrigerator is shown by the curve ■. In particular, since the pulse of the temperature curve (2) 0 is performed with the same output as the temperature curve (2), the food to be cooked W may swell too much or explode due to high-frequency heating and lose its shape.

The present invention has been made in view of the above-mentioned circumstances, and when cooking a food by simultaneous heating with a heater and a magnetron using a high-frequency oscillation circuit, the microwave firing ratio by the magnetron is gradually controlled. An object of the present invention is to provide a heating cooking device that improves the cooking finish by controlling the swelling of the inside of the food to be cooked in accordance with the progress of browning of the food to be cooked. It is.

[Structure of the invention]

(Means for solving the problems and their effects) The present invention includes:
In a heating cooking device that is equipped with a heater and a high-frequency oscillation circuit and can simultaneously heat the food to be cooked in the oven, a humidity sensor is attached to the oven, and this temperature sensor 9'' is controlled by a micro combi coater. ) to a relay contact provided in a part of the high frequency oscillation circuit, and operates the relay contact based on a detection signal from the temperature sensor to quickly control the microwave oscillation ratio of the high frequency oscillation circuit. Thus, the food to be cooked can be cooked to a good finish by simultaneous heating.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

Note that the present invention will be described with the same reference numerals assigned to the same constituent members as in the above-described specific example.

In Fig. 1, d3 indicates the box-shaped case body (1).
cabinet), and an operation panel 1b is attached to the front of the case body 1.
As shown in FIG. 2, a control device 14 based on a microcomputer is provided on the back side of b. In addition,
The operation panel 1bl includes, in order from the top, a display part a lunge key b1 heaters 13a and 13b and a magnetron 7.
Combination key when using and C1 each food selection key (
Cake) A d1 timer, a hot stone setting key e, a cooking key f, etc. are provided electrically connected to the control device 14.

On the other hand, in FIG. 2, an oven frame 4 forming an oven 2 is provided inside the case body 1, and a temperature sensor (temperature detection 15 is attached. Further, in the oven 2 and the machine cavity 3 in the case body 1, a second
As shown in the figure, an electric circuit 16 of the heating cooking device is incorporated, and this electric circuit 16 includes a heater 1.
A high frequency oscillation circuit 18 connected to the secondary side of the high voltage transformer 17 and the high voltage transformer 17 is provided. Further, a magnetron 7 (see FIG. 6) is connected to this high frequency oscillation circuit 18, and a contact 19a of a relay contact 19 is attached to the power supply circuit of the high voltage transformer 17.
9 is connected to the control circuit 14.

Therefore, for example, when cooking a cake in the oven 2, the necessary cooking time and heating temperature are set in advance by pressing the selection key d and the setting key e on the operation panel 1b, and then the cooking By pressing the button f, the magnetron 7 and the heater 13 are energized at the same time. Then,
The food to be cooked in the oven 2 is heated from its inner shell and outer shell. When the temperature inside the oven 2 reaches the set temperature, the temperature sensor 9-15 detects this, and this detection signal is sent to the microcomputer control device 14. operates one of the relay contacts, thereby controlling the microwave oscillation ratio of the high frequency oscillation circuit 18 in a short period. That is,
The control device 14 gradually reduces the output of the microwave by activating the relay contact 19 to maintain the temperature inside the oven 2 at the set temperature.

In this way, the object to be cooked is heated simultaneously from the inner and outer sides of the object, and a puffy cake with an appropriate brown color is cooked.

Next, as shown in the graph of FIG.
The temperature curve (2) and the temperature curve (2) of pulses controlled by the magnetron 7 are constant, and the temperature inside the oven 2 at this time is as shown by the curve (2). Furthermore, to explain this using the graph applied to the cake shown in FIG. 4, in the graph shown in FIG. 4, when the heater 13 and the magnetron 7 are simultaneously energized, the temperature inside the oven 2 gradually increases. Along with this, the microwave oscillation output by Magne 1 Heron 7 is initially about 650 W, but the microwave oscillation ratio is shortened based on the hot water temperature detection signal from the temperature sensor 9 (15). By avoiding changes, the temperature of the food to be cooked (cake) will gradually decrease, for example, 18
At 0°C, the output of the microwave is approximately 400W.
decreases to a certain degree. Therefore, while keeping the internal temperature constant, the a+lI control device 14 briefly changes the microwave oscillation ratio, lowering it to about 100W, and then holding it as it is for a certain period of time. After the elapsed time, heating ends.

Therefore, the microwave speed heating capability of the magnetron 7 is effectively and appropriately utilized to heat the inside and inflate it, while the heater 13 is used to burn the surface to an appropriate color for finishing. be able to.

〔Effect of the invention〕

As described above, according to the present invention, the heating cooking device J3 is equipped with the heater 13 and the high frequency oscillation circuit 18 and is capable of simultaneously heating the food to be cooked in the oven 2, and the temperature 11 sensor is installed in the oven 2. 15, the temperature sensor 15 is connected to a relay contact 19 provided in a part of the high frequency oscillation circuit 18 via the control circuit 14, and the one relay contact is activated based on the detection signal from the temperature sensor 15. Since the microwave emission ratio of the high-frequency oscillation circuit 18 is controlled quickly, not only can a good finish of the food to be cooked be achieved, but also the handling operation is easy. Moreover, since the construction is simple, assembly is also easy.

[Brief explanation of drawings]

FIG. 1 is a front view of the operation panel of the heating cooking device according to the present invention, FIG. 2 is an electric circuit diagram incorporated in the present invention, and FIG.
4 and 4 are graphs showing the relationship between the heater according to the present invention and the microwave of the high frequency oscillation circuit in terms of temperature and time, and FIG. 5 is a front view of the already proposed heating cooking device. FIG. 6 is a cross-sectional view of the same as above, and FIG. 7 is a graph showing the relationship between the microwaves of the heater and the high-frequency oscillation circuit in the heating cooking apparatus as a function of temperature and time. DESCRIPTION OF SYMBOLS 1... Coos main body, 2... Oven, 4... Oven frame, 13... Heater, 14... Control circuit, 15... Temperature sensor, 17... High voltage transformer, 1
8...High frequency oscillation circuit, 19...Relay contact. Applicant's representative 'Ji Fuji - Male Time - Figure 7

Claims (1)

[Claims] In a heating cooking device that is equipped with a heater and a high-frequency oscillation circuit and can simultaneously heat the food to be cooked in the oven, a temperature sensor is attached in the oven, and this humidity sensor is connected to the high-frequency oscillation circuit through a control circuit. The microwave oscillation ratio of the high frequency oscillation circuit is controlled by connecting to a relay contact provided in a part of the circuit, and activating the relay contact based on a detection signal from the temperature sensor. Heating cooking device.