JP2001004150A - Heating cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a deterioration of an electric component due to vapor during heating and to control a cooling means without affecting an influence to finishing by intermittently driving an air supply means when heated and cooked. SOLUTION: The heating cooking apparatus comprises a sheathed heater 5, a planar electric heater 12 or a magnetron 8 for generating a microwave for cooking a material 7 to be heated in a heating chamber 4. The apparatus also comprises a turntable motor 10 for rotating the material 7, and an electric component 11 such as a high-voltage transformer or the like. A blower motor for driving a cooling fan (not shown) is connected to a relay switch to drive the switch. In the case of driving the blower immediately after starting heating, food is heated by using the heaters 5, 12. In the case of driving the blower after a predetermined time is elapsed, the food is heated by the heaters 5, 12 and then the blower is driven. The blower is intermittently driven, and a flow of vapor when heated and driven is supplied from the electric equipment chamber having the magnetron 8 and the component 11 out of the heating cooker through the chamber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for improving safety in a cooking device capable of performing both oven cooking and microwave cooking.

[0002]

2. Description of the Related Art In a so-called oven microwave oven, a microwave such as a magnetron is driven by a cooling fan for cooling a magnetron and other electric components during microwave heating cooking using a generating means. However, during oven cooking using electric heating means such as a sheathed heater, the cooling fan is generally stopped.

[0003] Conventionally, when a cooling fan is operated during oven cooking, low-speed rotation using a phase control element such as a thyristor has been used.

[0004]

During the heating by the electric heating means as described above, in the case of an object to be heated in which a large amount of the above occurs,
The steam leaked from the heating chamber to the storage part of the electrical component, and there was a possibility that the electrical component might be deteriorated or insulation failure might occur.

In order to suppress this, when the on / off control of the electric heating means by the relay is performed, if the cooling fan is driven during the heating by the electric heating means, the cooling air such as the outside air enters the heating chamber and the electric heating cooking is performed. There is a problem that it has a bad effect on the finished product.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and suppresses deterioration of electric parts and the like due to generation of a large amount of steam during heating by electric heating means, and has an adverse effect on the finish. It is an object of the present invention to provide a method of controlling a cooling unit without any trouble.

[0007]

According to the first aspect of the present invention, there is provided an electric heating means for performing heater heating cooking on an object to be cooked in a heating chamber, and a microwave generating means for performing microwave heating cooking. A time measuring means for measuring the operation time of each means, a blowing means for cooling the microwave generating means and the like, and a control means for controlling the operation of each means,
At the time of heating cooking by the operation of the electric heating means, the blowing means is driven.

The invention according to claim 2 is characterized in that the blowing means is operated intermittently, and the stop time is longer than the operation time.

The invention according to claim 3 is characterized in that the intermittent operation of the blowing means is started after a lapse of a predetermined time from the start of heating by the electric heating means.

According to a fourth aspect of the present invention, there is provided a temperature measuring means for measuring the temperature in the heating chamber, and the predetermined value increases as the detected value of the temperature in the heating chamber at the start of heating by the electric heating means increases. It is characterized in that the time is adjusted to be shorter.

According to a fifth aspect of the present invention, there is provided a temperature measuring means for measuring a temperature in the heating chamber, wherein the heating means starts the heating by the electric heating means and waits until a value detected by the temperature measuring means reaches a predetermined value. The intermittent operation of the blowing means is started.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cooking device according to the present invention.

FIG. 1 is a front structural view of an embodiment of the heating and cooking apparatus of the present invention. In the figure, reference numerals 1 and 2 denote an upper case and a lower case constituting an outer shell, 3 denotes a support leg provided in the lower case, 4 denotes a heating chamber provided in the upper and lower cases 1 and 2, and 5 denotes a heating chamber. A sheath heater 12 disposed above the chamber 4 and serving as electric heating means for oven-cooking the object 7 to be heated. Reference numeral 12 denotes an electric heating plane heater disposed below the heating chamber 4 and serving as electric heating means for heating and heating the object 7 in the oven. , 6 is a tray for heating and cooking the object 7 by dividing the heating chamber into two stages, 8 is a magnetron disposed on the outer surface of the heating chamber and serving as a microwave generating means for microwave heating and cooking, 9
Is a waveguide for transmitting microwaves generated from the magnetron 8 into the heating chamber, 10 is a turntable motor for rotating the object to be heated during the microwave heating cooking,
Reference numeral 11 denotes an electrical component such as a high-voltage transformer.

Next, the basic circuit configuration of the cooking device of the present embodiment will be described with reference to FIG.

[0015] Commercial power supply (100V, 50Hz / 60H)
z) through a relay switch RL1, a door switch DS, and a relay switch TL4.
V. T. The high-pressure transformer H.T. V. The upper heater 5 and the lower heater 12 are connected in parallel to T via relay switches RL5 and RL6, respectively.

The turntable motor 10 and the cavity lamp CL omitted in FIG.
The blower motor BM, which is connected to and controlled on / off by this, and rotationally drives the cooling fan also omitted in FIG. 1, is connected to the relay switch RL2 to control the drive.

The high-voltage transformer H. V. A magnetron 8 is connected to the secondary side of T, and a constant circuit TC consisting of a resistor and a capacitor is connected to a diode.

MT is a monitor switch, which operates so as to close when the door is opened. The switch MT remains open even after the door is opened due to an abnormality in the door switch DS or relay switch RL1 linked to the door.
And a safety switch that forms a short circuit of a power supply and blows the thermal fuse TF when the circuit cannot be opened because the relay switch RL1 does not open.

Each of the relay switches RL2, RL3, R
L8 is connected to the output port of the control circuit CC. The control circuit CC exchanges signals with a microcomputer MC constituting a part thereof as shown in FIG.
The control circuit CC receives a key input from the operation section KI and data from the temperature measurement section IR, analyzes the data with the microcomputer MC, and operates the relay switches RL1 to RL8 which take charge of the operation of each component as shown in the figure. Control on / off.

Next, different operations of the present invention having the above configuration will be described with reference to the flowcharts of FIGS. (1) When Blower is Operated Immediately After Starting Heating FIG. 4 is an operation flowchart in a mode in which food is heated using the heaters 5 and 12.

When heating is started by a start input from the operation section KI in step S1, the upper and lower heaters 5, 12 are turned on by closing the relay switches RL5, RL6 (step S2).

Next, the cooking menu selected by the user is checked, and it is checked in step S3 whether or not this is a predetermined specific cooking menu 1 (for example, a heating cooking menu for foods that generate a large amount of steam).

A control program of the microcomputer MC is previously set so that the blower is intermittently operated only when the specific cooking menu 1 is selected (the relay switch RL2 is periodically turned on / off).
If it is determined in step 3 that the menu is the specific cooking menu 1, the process proceeds to step S4, and the blower is operated intermittently.

Then, it is determined in step S5 whether or not the heating end time has been reached. If so, cooking is ended in step S6.

On the other hand, if it is not the specific cooking menu 1 in step S3, the process proceeds to step S5 without operating the blower. (2) When Blower is Operated After Predetermined Time Elapses After Starting Heating FIG. 5 is an operation flowchart in the mode of heating the food using the heaters 5 and 12 and operating the blower after a while.

When heating is started by a start input from the operation unit KI in step S21, the upper and lower heaters 5, 12 are turned on by closing the relay switches RL5, RL6 (step S22).

Next, the cooking menu selected by the user is checked, and it is determined whether or not this is a predetermined specific cooking menu 2 (a food cooking menu different from the cooking menu 1 in the above (1)). Check in S23.

The elapsed time from step S21 is compared with a predetermined time t (step S24).

A control program of the microcomputer MC is previously set so that the blower is intermittently operated only when the specific cooking menu 2 is set (the relay switch RL2 is periodically turned on / off).
If it is determined at 23 that the menu is the specific cooking menu 2, after the elapse of the time t at step S24, the process proceeds to step S25, where the blower is operated intermittently.

Then, it is determined in step S26 whether or not the heating end time has been reached, and if it has been reached, cooking is ended in step S28.

On the other hand, if it is not the specific cooking menu 2 in step S23, the process proceeds to step S27 without operating the blower, and when the heating end time is reached, the heating is ended in step S28. (3) When the blower is operated after reaching a predetermined temperature from the start of heating FIG. 6 is an operation flowchart in the mode of heating the food using the heaters 5 and 12 and operating the blower after a while.

When heating is started by a start input from the operation section KI in step S31, the upper and lower heaters 5, 12 are turned on by closing the relay switches RL5, RL6 (step S32).

Next, the cooking menu selected by the user is checked, and this is determined as a predetermined specific cooking menu 3 (a cooking menu for food different from the cooking menus 1 and 2 of (1) and (2)). It is checked in step S33 whether or not this is the case.

Then, the temperature in the heating chamber from step S31 is constantly detected by the temperature detecting means (temperature measuring section IR), and the detected temperature Th is compared with a predetermined temperature T1 (step S34).

A control program of the microcomputer MC is previously set so that the blower is intermittently operated only when the specific cooking menu 3 is set (the relay switch RL2 is periodically turned on / off), and the step S is performed.
If it is determined that the menu is the specific cooking menu 3 in step 33, after checking the matching with the temperature T1 in step S34,
Proceeding to step S35, the blower is operated intermittently.

Then, it is determined in step S36 whether or not the heating end time has been reached. If so, cooking is ended in step S38.

On the other hand, if it is not the specific cooking menu 3 in the step S33, the process proceeds to the step S37 without operating the blower, and when the heating end time is reached, the heating is ended in the step S38. (4) When the blower is to be operated from the time at which the blower is operated according to the temperature of the heating chamber immediately after the start of heating FIG. 7 shows the case where the food is heated using the heaters 5 and 12 and the blower is operated after a while. 4 is an operation flowchart of FIG.

When heating is started by a start input from the operation unit KI in step S41, the upper and lower heaters 5, 12 are turned on by closing the relay switches RL5, RL6 (step S32).

Next, the cooking menu selected by the user is checked, and the selected cooking menu is determined by a predetermined specific cooking menu 4 (the cooking menu 1 of (1), (2), and (3) above).
In step S43, it is checked whether or not a food cooking menu different from those of the foods 2 and 3 may be used, or the same menu may be used.

Then, the temperature in the heating chamber from step S41 is detected by the temperature detecting means (temperature measuring section IR), and the detected temperature Th is determined at predetermined temperatures T1, T2 (T1
<T2) (Step S44).

From the result of the above comparison, Th <
In the case of T1, the predetermined time t = t1 is set (S441),
When T1 ≦ Th <T2, t = t2 is set (S44).
2) When t2 ≦ Th, t = t3 is set (t1
<T2 <t3> (S443).

A control program of the microcomputer MC is previously set so that the blower is intermittently operated only when the specific cooking menu 4 is selected (the relay switch RL2 is periodically turned on / off).
If it is determined that the menu is the specific cooking menu 4 in step 43, the predetermined time t is set to t1 to t1 in step S44 by the initial heating temperature.
The predetermined time t1 (or t2, or t2), which is set to any one of t3 and the elapsed time from the start of heating is selected.
After it is determined in step S45 whether or not the value matches 3), the process proceeds to step S46, and the blower is operated intermittently.

Then, it is determined in step S47 whether or not the heating end time has been reached, and if it has been reached, cooking is ended in step S49.

On the other hand, if it is not the specific cooking menu 4 in step S43, the process proceeds to step S48 without operating the blower, and when the heating end time is reached, the heating is ended in step S49.

[0045]

FIG. 8 is a diagram corresponding to FIG. 1 showing the flow of steam during the blower operation, and FIG. 9 is a diagram corresponding to FIG. 1 showing the flow of steam without the blower operation.

According to these figures, the flow of steam during the blower operation flows from the electrical equipment room where the magnetron 8 and the electrical components 11 are located to the outside of the cooking device via the heating chamber 4.

Therefore, according to the present invention, the steam can be efficiently released to the outside air when the food is heated such that a large amount of steam is generated, thereby suppressing damage to the electric components.

Further, the operation of the blower is intermittent, and there is an advantage that the heating efficiency itself is not greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front configuration diagram of an embodiment of a heating cooking device of the present invention.

FIG. 2 is a circuit diagram of one embodiment of the present invention.

FIG. 3 is a connection diagram of a control circuit.

FIG. 4 is an operation flowchart of the cooking menu 1.

FIG. 5 is an operation flowchart of a cooking menu 2.

FIG. 6 is an operation flowchart of the cooking menu 3.

FIG. 7 is an operation flowchart of the cooking menu 4.

FIG. 8 is a diagram illustrating the flow of steam during blower operation.

FIG. 9 is a diagram illustrating the flow of steam when the blower is stopped.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Leg 4 Heating chamber 5, 12 Heater 6 Tray 7 Food to be heated

Claims (5)

[Claims] 1. An electric heating means for performing heater heating cooking on an object to be cooked in a heating chamber, a microwave generating means for performing microwave heating cooking, and a time measuring means for measuring an operation time of each means. And a control means for controlling the operation of each of the means for cooling the microwave generating means and the like, wherein the means for driving the blower means at the time of heating and cooking by operating the electric heating means. Cooking device. 2. The heating and cooking apparatus according to claim 1, wherein the blower is operated intermittently, and a stop time is longer than an operation time. 3. The heating and cooking apparatus according to claim 1, wherein the intermittent operation of the blower is started after a lapse of a predetermined time from the start of heating by the electric heater. 4. A temperature measuring means for measuring the temperature in the heating chamber, wherein the predetermined time is shortened as the value detected by the temperature measuring means at the start of heating by the electric heating means increases. The cooking device according to claim 3, wherein the heating device is adjusted. 5. A temperature measuring means for measuring a temperature in the heating chamber, wherein the intermittent operation of the air blowing means is performed after a start of heating by the electric heating means until a value detected by the temperature measuring means reaches a predetermined value. 4. The cooking device according to claim 3, wherein the heating is started.