KR940004002B1 - Gas range - Google Patents

Abstract

Combustion hot air within a combustion chamber is supplied by a combustion fan through an air passage into a heating chamber. Then, hot air within a heating chamber is circulated by a circulating fan. At this time, a control device operates the circulation fan and in turn an operating state of a burner and a combustion fan is varied before and after a temp. within a heating chamber reaches its predetermined value. When a heating with the burner and/or other heaters, a rising of temp. within the heating chamber is superior and a uniform distribution of temp. is attained, and at the same time after the temp. reaches its predetermined value, an operation of the combustion fan is changed, a rapid cooling of heating chamber is prevented and a temp. within the heating chamber is kept at a proper value.

Description

Cooker

1 is a longitudinal sectional view of the composite heating cooker of the embodiment.

2 is a perspective view showing a constituent member installed at the bottom of the main body of the embodiment;

3 is a perspective view showing the internal structure of the rear body.

4 is a partial perspective view showing a part of the structure of FIG.

5 is a horizontal sectional view showing the structure of the rear part of the heating chamber.

6 is a perspective view from behind of the cooker main body.

FIG. 7 is a partial perspective view showing a part of the main body rear portion of FIG.

8 is a circuit diagram including the control device of the embodiment.

9 is a waveform diagram of a signal for operating a circulation fan, a combustion fan, and a burner.

10 through 16 are flowcharts showing the operation of the embodiment.

17a and 17b show the relationship between temperature detection and oven cooking.

* Explanation of symbols for main parts of the drawings

2: cooker body 4: heating chamber

6: combustion chamber 8: air passage

10: door 12: plate

14 magnetron 16: turntable

17: motor 18, 20: case

22 burner 24 combustion fan

30: entrance passage 36: intermediate passage

38: exit passage 40: cover

42: through hole 44: opening

46: circulation fan 52: cooling passage

55: exhaust passage 56: exhaust passage

57: temperature sensor 58: humidity sensor

60: cooling fan 80: power circuit

82: CPU 84: door switch

88: photocoupler 90: drive circuit

The present invention relates to a heating cooker for cooking with a burner heated by a burner, or a heating cooker including a combined cooker capable of both heating cooking and microwave cooking by a high frequency in combination with an oven and a microwave oven.

As a conventional heating cooker, as described in Japanese Patent Application Laid-Open No. 58-51162, it has a combustion chamber accommodating a heating chamber and a burner in a main body, and an air passage for guiding the heated combustion heat into the heating chamber, It is known to have a circulating fan for purifying combustion heat of. In this case, the combustion heat heated by the burner of the combustion chamber is introduced into the heating chamber by the suction action of the circulation fan.

However, in this type of cooker, when the burner is stopped to adjust the temperature during cooking, cold air from the outside that is not heated in the combustion chamber is introduced into the heating chamber through the air passage by the circulation fan to promote cooling of the heating chamber. There is inadequacy to increase the operating frequency of the burner. Therefore, the circulation fan is interlocked with the operation of the burner to stop the operation of the circulation fan in accordance with the operation of the burner.However, if the operation of the circulation fan is stopped during cooking, the temperature distribution in the heating chamber becomes uneven and the heat unevenness of the food is eliminated. There is a problem that occurs.

On the other hand, in a cooker, for example, as described in Japanese Unexamined Patent Publication No. 59-33937, a circulation fan is provided in the heating chamber, while the heating chamber is indirectly heated and burned at the same time by the combustion heat from the burner. It is proposed to install an exhaust fan that draws heat into an air passage outside the heating chamber and discharges it therefrom. In this case, the circulation fan is a homogeneous type that is always automatic during cooking, and the circulation fan is linked to operate the exhaust fan in conjunction with the operation of the burner. According to this, the circulation fan always circulates the combustion heat in the heating chamber to achieve a uniform temperature distribution and at the same time prevents the cooling of the heating chamber by stopping the operation of the exhaust fan when the burner is stopped.

However, since the oven is an indirect heating type and a structure in which the air heated by the burner is discharged to the outside through the air passage outside the heating chamber without introducing into the heating chamber, the temperature in the heating chamber is higher than that of the direct heating type. Lagging behind is inevitable. Accordingly, when this is combined with a microwave oven and combined cooking, the high frequency heating and the heating by combustion are combined to reduce the output of the high frequency heating in accordance with the rise of the combustion heating, resulting in a long cooking time.

On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 64-35310, in a direct heating type oven, a combustion fan is provided behind the burner of the combustion chamber, and combustion from the burner is performed by operation of the combustion fan. A structure for forcing hot air into the heating chamber has been proposed. However, in this case, since the circulation fan is not provided and the heat is only sent to the heating chamber, there is a problem that the temperature distribution in the heating chamber becomes uneven as in the prior art, causing uneven heating of the food.

In order to solve this problem, it is conceivable to provide a circulation fan as described above. However, as a heating cooker, a direct heating method of sending combustion heat from a burner to a heating chamber by a combustion fan is preferable. How to control fan operation is an important issue.

Accordingly, an object of the present invention is to provide a heat cooker having a circulating fan for uniformly distributing heat in a heating chamber and a combustion fan forcibly supplying air heated by a burner to the heating chamber. It is to realize an excellent cooking function by adjusting and controlling.

The heating cooker of the present invention is driven in connection with the operation of the burner and the combustion chamber accommodating the heating chamber and the burner accommodating the food, the air passage communicating the heating chamber and the combustion chamber, the circulation fan circulating air in the heating chamber and the burner. The combustion fan forcibly sending the combustion heat of the gas through the air passage into the heating chamber, and continuously operating the circulation fan during cooking, while the burner and the combustion fan were allowed to reach the predetermined temperature before the temperature in the heating chamber reached a predetermined value. It is characterized in that it comprises a control device for controlling by changing its operating state later.

In the embodiment of the present invention, the burner is operated by using two fans by the control device, and the circulation fan and the combustion fan are continuously rotated until the temperature in the heating chamber reaches a predetermined value, and the temperature in the heating chamber is adjusted to the predetermined value. After reaching the rotation fan, the burner and the combustion fan are intermittently rotated, or the burner is operated, and the circulation fan is rotated forward and backward at predetermined intervals while the temperature in the heating chamber is maintained. The combustion fan is continuously rotated at a predetermined speed until the temperature reaches a predetermined value, and after the temperature in the heating chamber reaches the predetermined value, the burner is continuously operated and the combustion fan is rotated less than the predetermined speed. Rotating method is used.

According to the present invention, there is provided a combined cooker in which an oven and a microwave oven are combined, a heating chamber accommodating food, a high frequency generator generating high frequency introduced into the heating chamber, a combustion chamber accommodating a burner, the heating chamber and a combustion chamber. An air passage communicating with the air, a circulation fan for circulating air in the heating chamber, a combustion fan forcing the combustion heat in the combustion chamber to pass through the air passage in the heating chamber, and continuously operating the circulation fan during cooking, The burner and the combustion fan have a control device for changing and controlling the operation state before and after the temperature at the time of heating reaches a predetermined value, and during the high frequency heating, only the combustion fan is rotated in advance by the control device. A heating cooker is provided.

According to the present invention, combustion air heated by a burner in a combustion chamber is supplied into a heating chamber through an air passage by a combustion fan. Then, the heat in the heating chamber is circulated by the circulation fan. At this time, while the control device always operates the circulation fan, the operation state of the burner and the combustion fan is controlled before and after the temperature in the heating chamber reaches a predetermined value. As a result, when heating by combustion, or when heating by high frequency heating is used together with combustion, the temperature rise of the heating chamber is satisfactory, and a uniform temperature distribution is achieved, and after the temperature reaches a predetermined value, combustion is performed. By changing the operation of the fan, it is possible to prevent rapid cooling of the heating chamber and to maintain the temperature in the heating chamber at an appropriate value.

In addition, by rotating only the combustion fan during high-frequency heating, the inside of the heating chamber can be forcedly cooled to remove moisture, and cooking control by a humidity sensor can be performed.

1 is a longitudinal sectional view of the heat cooker of the embodiment.

The cooker 1 includes a heating chamber 4 for accommodating food in the main body 2, a combustion chamber 6 formed below it, and a combustion heat generated in the combustion chamber 6 inside the heating chamber 4; It has an air passage (8) for guiding it.

The heating chamber 4 heat-treats the inner surface and has an air layer for thermal insulation on the outer circumference. In the heating chamber 4, the dish 12 which can be freely moved in and out is accommodated in two stages through the opening which opens and closes to the door 10 of the main body front surface.

The magnetron 14 (FIG. 6) is provided above the back side of the heating chamber 4 as a high frequency generator which supplies a high frequency electric wave in a heating chamber.

In the bottom part of the heating chamber 4, the inside of a tentable 16a is provided, and the case 18 which accommodated the motor 17 and the weight sensor which rotate-drives the tentable 16a is provided in the lower part. The weight sensor is capacitive and is cooked to check that it is placed on the food on the turntable 16b in later microwave cooking and thawing by microwave, or to set the cooking time by weight. It is to detect the weight of water.

In addition, as shown, the dish 12 is accommodated in the heating chamber 4 irrespective of the turntable 16b, but the confirmation of the presence of the dish 12 is detected by a sensor not shown.

On the other hand, the combustion chamber 6 is formed by the case 20 arranged below the heating chamber 4 as shown in FIG. 2, and the burner 22 is accommodated therein and heated at the butter 22 at the same time. The combustion fan 24 which sends combustion heat to 24 and 8 forcibly, and the motor 25 which rotationally drives this fan are provided.

In addition, an opening 19 (FIG. 1) is formed at the lower side of the turntable 17 and the case 18 in which the weight sensor is accommodated. As described later, a combustion fan corresponding to the operation of the gas burner 22 is formed. When 24) is activated, air is drawn through the opening 19 from the lower side of the main body 2, as indicated by the arrows in FIG. 1, to cool the turntable 17 and the weight sensor.

The air passage 8 connecting the combustion chamber 6 and the heating chamber 4 is formed of the following members provided at the rear of the heating chamber 4, as shown in FIGS. That is, the inlet passage 30 on the combustion chamber side formed by the partition plates 26 and 28 extending in the horizontal direction, and the partition plate 32 disposed behind the heating chamber 4 and the lower portion of the partition plate 32. The intermediate passage 36 formed by the U-shaped partition plate 34 extending upwardly from the side, the side edge portions 32L and 32R extending forward from the left and right sides of the rear partition plate 32, and the cover 40 at the rear of the heating chamber. It consists of an outlet passage 38 formed by.

Accordingly, the combustion heat heated in the burner 22 of the combustion chamber 6 enters the inlet passage 30 as indicated by the arrows in FIGS. 3 and 4 by the operation of the combustion fan 24. Cut into 36, and then rotate backward through a plurality of through-holes 42 installed in the rear confinement plate 32, and heat through the outlet passage 38 exiting the front urinary from the left and right of the rear partition plate 32. It is introduced into the chamber 4.

At this time, the turntable motor and the weight sensor are cooled by the operation of the combustion fan 24 as described above.

Next, the circular opening 44 is provided in the center part of the rear partition board 32 of the heating chamber 4, and the circulation fan 46 is arrange | positioned freely behind it. The circulation fan 46 sucks air in the heating chamber 4 backward from the opening 44 of the partition plate 32, as indicated by the arrow in FIG. 5, and burns heat by the burner 22. As shown in FIG. In addition, by being fed back into the heating chamber 4 from the outlet passages 38 on the left and right sides of the partition plate 32, the heat in the heating chamber 4 is circulated, and at the same time, the temperature in the heating chamber 4 is rapidly increased. At the same time, it has the function of eliminating heating unevenness. In other words, in this embodiment, the combustion heat sent to the air passage 8 by the combustion fan 24 and the circulating heat in the heating chamber 4 are mixed and supplied into the heating chamber 4 to thereby maintain the temperature in the heating chamber. Uniformization is efficiently achieved. The rotating shaft 48 of the circulation fan 46 is connected to the motor 52 shaft accommodated in the motor case 50 provided at the rear of the back of the cover 40, and is driven by the rotation thereof.

Between the cover 40 at the rear of the heating chamber and the motor case 50, as shown in FIG. 1, a cooling passage 54 is formed which communicates with the outside through the case 50 with the rear portion opened. The upper end of the cooling passage 54 and the upper end of the cooling passage 54 communicate with the exhaust passage 55 above the main body 2 and the exhaust passage 56 extending upward from the main body 2. In addition, a humidity sensor 58 is provided above the cooling passage 54, and a fan 60 coaxial with the circulation fan 46 for cooling the periphery of the humidity sensor 58 below the heat resistance temperature of the sensor. Is installed in the cooling passage (54).

In addition, as shown in FIG. 1, punching is performed to prevent air from passing through the front of the partition plate 32 at the rear side of the heating chamber 4 or to block high frequency in the heating chamber 4 from leaking to the outside. The plate 62 is provided.

6 and 7, the magnetron l4 is provided at the upper right end of the flue of the cooker main body 2, but below the electronic circuit board 64 having the circuit described below; A fan 66 for magnetron cooling is provided, and on the outside thereof, a synthetic resin is made to induce blowing by the fan 66 to the magnetron 14 and to prevent contact with the electronic circuit board 64 to which a high voltage is applied. Is provided with a wind guide and a substrate protecting member 68.

Again, as shown in FIG. 6, a case 70 containing a fan for cooling the handle 10a of the door 10 of the main body 2 is provided on the upper side of the main body, and the inside of the case is the first case. It is comprised so that it may communicate with the exhaust cylinder 56 shown in FIG. This fan is operated only when the heating room temperature concealed by the temperature sensor 57 (for example, dummyster) installed in the exhaust passage 55 shown in FIG. 1 is above a predetermined temperature (for example, 100 ° C). It shall be said. However, do not operate in the case of the later microwave operation.

8 is a circuit diagram including a control device for controlling the operation of the combustion fan 24, the circulation fan 46 and the burner 22 of the embodiment.

It mainly consists of the CPU 82 supplied with the predetermined drive voltage from the power supply circuit 80 connected to this control apparatus commercial power supply (AC 100V). The CPU 82 includes a key operation unit 83 disposed on the front of the main body to select various cooking operations, the weight sensor 84, the temperature sensor 57 in the heating chamber, the humidity sensor 58, and the door 10. ), A door switch 86 for detecting the opening of the door, a port coupler 88 detector for detecting the rotation of the combustion fan 24, the turntable 16, the combustion fan 24, and the circulation fan 46. ), A drive circuit (90) including a motor (l7, 25, 52, 67) such as a magnetron cooling fan (66), and an inverter for driving the magnetron (14), which is a high frequency generator, and a front surface of the main body, In addition, an indicator 91 including a temperature display section used in a later cooking operation is connected.

The drive circuit 90 including the inverter is variable according to the type of cooking by the magnetron when the heating rate of the food by the magnetron 14 is faster than the heating rate by the burner 22.

Again, the CPU 82 is in parallel with the bypass passage 96a to switch between the two solenoid valves 92 and 94 serially connected to supply the gas to the burner 22 and the gas amount as described later. Signal generation circuit for driving the drive solenoids MV1, MV2, MV3 of the solenoid valve 96 connected in series with the solenoid valves 92, 94, and the spark electrode (sparker) 97 ignited by the burner 22; 98 and a flame sensor 99 for detecting combustion of the burner 22 are connected.

In addition, a predetermined voltage is supplied to the motor and the driving circuit 90 from the power supply circuit 80 via the switch 100.

The CPU 82 is configured to output a signal for controlling the operation of the motor or the magnetron in accordance with the detection signals from the various detectors as described above.

The combustion fan 24 and the circulation fan 46 of the embodiment are controlled by the control device as shown in Figs. 9A and 9B. That is, FIGS. 9A and 9B illustrate a circulation fan motor (FM) 52, a combustion fan motor (NFM) 25, which operate the circulation fan 46, the combustion fan 24, and the burner 22, respectively, of the embodiment. This is a waveform diagram showing control preferences of the solenoid valves 92, 94, and 96. Control forms of FIGS. 9A and 9B are as follows.

9a shows that the circulation fan 46 and the combustion fan 24 are continuously rotated at predetermined rotational speeds (for example, l500 rpm and 2500 rpm) until the temperature in the heatability 4 reaches a predetermined value, respectively. 4) After the internal temperature reaches the predetermined value, the circulation fan 46 is continuously rotated and the combustion fan 24 is continuously rotated. At this time, the combustion fan 24 is synchronized with the input of the gas burner 22. That is, the input to the burner 22 is also continuously supplied at a predetermined heat amount (for example, 5300 kcal / m) until the temperature in the heating chamber 4 reaches a predetermined value, but the temperature in the heating chamber 4 is maintained at a predetermined value. After reaching, it is supplied intermittently.

In this way, the circulation fan 46 is always operated, while the combustion fan 24 corresponding to the operation of the burner 22 is before and after the temperature in the heating chamber 4 reaches a predetermined value, By changing and controlling the operating state, the rise in temperature outside the heating chamber 4 is satisfactory and a uniform temperature distribution is achieved, and after the temperature reaches a predetermined value, the rapid cooling of the heating chamber 4 is prevented and the inside of the heating chamber is prevented. Can be maintained at an appropriate temperature and gas can be saved as a fuel.

9B rotates the circulation fan 46 at regular time intervals (e.g., every minute), alternately and inversely, while setting the combustion fan 24 until the predetermined value in the heating chamber 4 is reached. After continuously rotating at a rotational speed (for example, 2500 rpm), and after the temperature in the heating chamber 4 reaches a predetermined value, the combustion fan 24 is continuously rotated at a rotational speed less than the predetermined rotational speed (for example, rpm). It is rotated by. At this time, the input to the burner 22 is continuously supplied at a predetermined amount of heat (for example, 5300 kcal / m) until the temperature in the heating chamber 4 reaches a predetermined value, but the temperature in the heating chamber 4 is maintained at a predetermined value. After reaching, it intermittently supplies with the heat quantity (for example, 3600 kcal / m) less than the said predetermined heat quantity.

In this case, the circulation fan 46 rotates forward and reverse alternately to stir the air so that the temperature distribution in the heating chamber 4 becomes more cracked, while the combustion fan 24 is rotated even if the circulation fan 46 reverses rotation. By this continuous rotation, the heat of the heating chamber 4 can be prevented from flowing back to the combustion chamber 6. In addition, after the temperature in the heating chamber 4 reaches a predetermined value, the input to the gas burner 22 is intermittently supplied with a heat quantity that is higher than the predetermined heat amount, thereby lowering the blowing temperature and eliminating uneven baking of the food. According to this, for example, the surface of meat, such as roast chicken, does not harden, and the effect that it can be completed softly can be acquired.

In addition to the above embodiment, the operation control of the combustion fan 24 and the circulation fan 46 is of course changed by the type of cooking. The form is as follows.

l. Combustion fan, circulation fan all-two continuous rotation

2. Combustion fan intermittent rotation / circulation fan continuous rotation

3. Intermittent rotation of both combustion fan and circulation fan

4. Combustion fan intermittent rotation / circulation fan stop

Said intermittent rotation may be continuous rotation which controlled rotation speed. Moreover, the form which links combustion of a burner and rotation of a combustion fan, and the form which stops combustion of a burner and rotates only a combustion fan are included.

Next, the operation of the embodiment will be described.

1. Microwave Cooking

As shown in Fig. 10A, when the operator first operates the microwave key (not shown) of the key operating portion 83 to set the switch temperature, microwave cooking is selected. Thereafter, the microwave cooking time is set in the timer by the time setting operation.

When the operator turns on the cooking start key after the sieve, the CPU 82 of the control device detects whether or not food is placed on the turntable detection, that is, on the turntable 16b by a signal from the weight sensor 84. Is replaced with "NO", a signal is output to the display unit 91 on the front surface of the main body to give an error display of meaning that no food is placed. On the other hand, if food is placed, driving of the turntable motor 17 and the combustion fan motor 25, energization of the magnetron 14, and countdown of the timer are started.

After that, the motor and the magnetron are driven until the time set in the timer has elapsed. When the set time has elapsed, the drive of the turntable motor 17 and the combustion fan motor 25 and the energization of the magnetron 14 are stopped. Hit the buzzer. This completes the l operation.

In the microwave cooking, driving the combustion fan 24 is based on the following reasons.

(a) Forced cooling in the heating chamber

For example, in the later thawing, it is necessary to lower the temperature in the heating chamber to an appropriate value before it. In such a case, the burner 22 is not burned, and by operating only the combustion fan 24, cold air is sent to the heating chamber 4 to cool it. At that time, the circulation fan 46 may be operated together with the combustion fan 24.

The forced cooling in the case of freezing is as shown in FIG.

First, when an operator turns on the freezer (not shown) of the key control part 83, a freezing operation is selected. After that, if the cooking start key is set to temperature, the CPU 82 performs the turntable check and displays an error if " NO ". On the other hand, if food is placed, it is checked by a signal from the temperature sensor 57 whether or not the temperature in the heating chamber is lower than or equal to a predetermined temperature (for example, 60 DEG C). If YES, thawing is performed. On the other hand, when the temperature is higher than the predetermined temperature, the temperature display unit on the front of the main body blinks and the surrounding buzzer is cut off.

Then, after the operator opens the door of the main body to take out or confirms the thawed food, closes the door and presses the cooking start key again, the CPU 82 operates the combustion fan 24 to perform forced cooling. When the temperature inside the heating chamber 4 is checked to reach a predetermined temperature or less, the temperature display on the front of the main body is turned on, and the operation of the combustion fan 24 is stopped to make a buzzer. Then, when the cancel key is pressed, it returns to the initial state.

By the way, forced cooling can also be performed in the state which food is not put in, and the procedure in that case becomes as shown in FIG.

When the operator turns on the heating chamber temperature confirmation key (not shown) of the key control unit 83 at first, the CPU 82 causes the temperature in the heating chamber 4 to become a predetermined temperature by a signal from the temperature sensor 57. For example, check whether it is below 60 ° C), and if it is "YES", the temperature display is turned on and the buzzer is turned off. On the other hand, when the temperature is higher than the predetermined temperature, the temperature display part blinks and the combustion fan 24 is operated to perform forced cooling. When the temperature in the heating chamber 4 is checked to reach a predetermined temperature or less, the temperature display is turned on, and the operation of the combustion fan 24 is stopped to apply a buzzer.

(b) Setting the initial state of the humidity sensor

By operating only the combustion fan 24, air is sent into the heating chamber 4, and prepurification of steam remaining in the heating chamber is performed. As a result, the moisture remaining in the heating chamber is removed, and the humidity is detected by the humidity sensor 58 with respect to the new cooking. An example in which the detection of humidity in a microwave oven is required is the case where the completion time of cooking is determined by the amount of steam generated when the cold rice is warmed. Examples of cooking using other humidity sensors are described later.

(c) steam removal in microwave ovens

Similarly to the above (b), when the burner 22 is not burned and air is sent into the heating chamber 4 by the operation of the combustion fan 24 alone, steam is discharged together with the air in the heating chamber. As a result, the door glass on the front surface of the main body can be prevented from being blurred during cooking.

As shown in FIG. 10B, the driving of the motor and the magnetron is stopped when the door 10 on the front surface of the main body is opened during the above microwave cooking, before the set time has elapsed. When the door 10 is closed again and the cooking start key is turned on, the operation after the above turntable detection is started.

2. Oven Cooking

As shown in FIG. 13A, when the operator turns on the oven key (not shown) of the key control unit 83, oven cooking is selected. Thereafter, the operation time of the oven is set in the timer by the time and the temperature setting operation, and the set temperature of the oven cooking is stored in the CPU 82.

Next, when the cooking start key is turned on, the CPU 82 starts the drive of the turntable motor 17, the circulation motor 52, and the combustion fan motor 25 and the countdown of the timer. In this case, the circulation fan 46 is rotationally driven in the control system of FIG.

Then, when the motor is driven until the time set in the timer elapses and the set time (for example, 8.5 seconds) elapses, the solenoid valves of the solenoid valves (MVl, MV2, MV3) are added to open the solenoid valve. At the same time, the sparker 97 is operated. The flame detection check of the burner 22 is performed by the flame sensor 99 provided in the combustion chamber 6, and the operation of the sparker 97 is stopped when a flame is detected. Thereafter, it is checked whether or not the temperature in the heating chamber is equal to or higher than the set temperature. When the temperature is higher than the set temperature, the solenoids MV1, MV2, and MV3 are flushed to close the solenoid valve and the combustion fan 24 is closed. When the number of rotations of the motor is reduced and the temperature of the heating chamber is lower than the set temperature again, the solenoids MV1, MV2, and MV3 are added to open the solenoid valve and simultaneously operate the sparker 97. The burner 22 and the combustion fan 24 are controlled as shown in FIG. 9B by repeating the procedure after the flame detection check.

On the other hand, when the flame is not detected even after a predetermined time (for example, 12 seconds) due to the flame check of the burner 22, the solenoids MV1, MV2, and MV3 are flushed to close the solenoid valve and the speaker 97 This operation stops the operation of the turntable 16, the circulation fan 46 and the combustion fan 24 to stop the buzzer.

In addition, when the set time has elapsed, as shown in FIG. 3B, the solenoids MV1, MV2, and MV3 are flushed to close the solenoid valve, and the turntable 16b, the circulation fan 46, and the combustion fan 24 are closed. ) Buzzer by driving and stopping.

When the door 10 is opened during cooking, as shown in FIG. 13C, the solenoids MV1, MV2, and MV3 are added to close the solenoid valve, and at the same time, the turntable l6, the circulation fan 46 and the combustion fan ( 24) and the countdown of the timer are stopped.

Then, when the door 10 is closed again and the cooking start key is pressed, it operates in order of FIG. 11A.

Ordinary oven cooking is as described above, but when yeast fermentation for bread cooking is carried out as follows. As shown in Fig. 14, when the operator first sets the oven key of the key measuring section 83 to the temperature, the oven cooking is selected, and the operation time is set in the timer by the subsequent time setting operation, and the key switch is again. The yeast fermentation is selected by operation.

Next, the CPU 82 checks whether or not the temperature in the heating chamber 4 is equal to or lower than a predetermined temperature (for example, 40 ° C), and when it is "YES", it performs late yeast fermentation control (FIG. 15). . On the other hand, when the temperature is higher than the predetermined temperature, the temperature display part on the front of the main body blinks and the caution buzzer is turned off.

After that, when the operator opens the door of the main body, takes out the food from the heating chamber, closes the door again, and presses the cooking start key, the CPU 82 operates only the combustion fan 24 to perform forced cooling. When the temperature is checked in the heating chamber 4 and the temperature is lower than the predetermined temperature, the temperature display part on the front surface of the main body is turned on while the operation of the combustion fan 24 is stopped and the buzzer is closed. Then press the cancel key to return to the original state.

The yeast fermentation control is performed as follows.

As shown in FIG. 15, the drive of the turntable motor 17, the circulation fan motor 52 and the combustion fan motor 25, and the countdown of the timer are started.

After that, the motor is driven until the time set in the timer elapses, and when the set time (for example, 8. 5 seconds) elapses, the solenoid (MV1, MV2, MV3) is added to open the solenoid valve. And sparker 97 at the same time. Then, the flame detection check of the burner 22 is performed by the flame sensor 99 provided in the combustion chamber 6, and the operation of the sparker 97 is stopped when the flame is detected. Thereafter, it is checked whether the temperature in the heating chamber 4 is equal to or higher than the yeast fermentation temperature, and when the temperature is higher than the corresponding temperature, the solenoids MVl, MV2, and MV3 are swept to close the solenoid valve and the combustion fan 24 When the number of revolutions is reduced and driven, when the temperature of the heating chamber is lower than the yeast fermentation temperature again, the solenoids MV1, MV2, and MV3 are added to open the solenoid valve and operate the sparker 97 at the same time. The burner 22 and the combustion fan 24 are controlled as described above by repeating the procedure after the flame detection check.

On the other hand, even when a predetermined time (for example, 12 seconds) is cured by the flame check of the burner 22, when the flame is not detected, the solenoids MV1, MV2, and MV3 are swept to close the solenoid valve and the sparker The operation of 97 is stopped, and the drive of the turntable 16, the circulation fan 46, and the combustion fan 24 is stopped and the buzzer is applied.

As described above, since the circulation fan 46 is not operated in the yeast fermentation control, the temperature in the heating chamber can be maintained at the set temperature for a long time even when the burner 22 is stopped.

3. Simultaneous Operation of Microwave Oven and Oven This operation can be performed by the operator selecting the simultaneous operation by key operation as shown in FIG. In this case, the operating time of the microwave oven and the oven is set in the timer by the time and the temperature setting operation, and the set temperature of the oven is stored in the CPU 82. Next, when the cooking start key is turned on, the above operations 1 and 2 proceed simultaneously.

Incidentally, in the illustrated embodiment, the humidity sensor 58 is used for microwave cooking. However, in gas oven cooking, there may be cases where it is desired to detect boiling by detecting humidity such as cooking rice. However, in the oven, there is a problem that the humidity sensor cannot be used because moisture and gas are contained in the combustion heat.

In the present embodiment, the following method is adopted to solve this problem.

First, as shown in FIG. 17A, only the combustion fan 24 is deactivated during operation. When microwave cooking is performed and the humidity sensor is operated to detect back lighting, the humidity detection by the humidity sensor is stopped and oven cooking is started.

In contrast, in the case of oven cooking, combustion heating is intermittently performed as shown in FIG. 17B, and humidity is detected by the humidity sensor while it is stopped. When the boiling is detected, the humidity detection is stopped.

As mentioned above, although the Example was described, this invention is not limited to this, A various change is possible.

As described above, according to the present invention, the circulation fan is always operated in a heating cooker having a circulation fan for circulating the heat in the heating chamber and a combustion fan forcibly supplying the combustion heat heated by the burner to the heating chamber. Since the fan is controlled to change the operating state before and after the temperature in the heating chamber reaches a predetermined value, when the high frequency heating and the heating by combustion are used together, the temperature rise in the heating chamber is good and the temperature is uniform. After achieving the distribution and at the same time the temperature reaches a predetermined value, it is possible to prevent rapid cooling of the heating chamber to maintain the temperature in the heating chamber at an appropriate value and to achieve saving of fuel gas.

Claims (7)

A heating chamber accommodating food, a combustion chamber accommodating a burner, an air passage communicating the heating chamber and the combustion chamber, a circulation fan circulating air in the heating chamber, and driven in conjunction with the operation of the burner, The combustion fan forcibly sending combustion heat to the heating chamber via the air passage, and continuously operating the circulation fan during cooking, while the burner before and after the temperature in the heating chamber reaches a predetermined value. And a control device for changing and controlling the operation state of the combustion fan. 2. The control apparatus according to claim 1, wherein the control device operates the burner to continuously rotate the circulation fan and the combustion fan until the temperature in the heating chamber reaches a predetermined value, and after the temperature in the heating chamber reaches a predetermined value. The heating cooker is characterized in that for operating the burner intermittently while continuing to rotate the circulation fan and at the same time rotating the combustion fan intermittently. The combustion fan of claim 1, wherein the control device operates the burner and simultaneously rotates the circulation fan at a predetermined time interval alternately, while the combustion fan until the temperature in the heating chamber reaches a predetermined value. Continuously rotated at a predetermined rotational speed, and after the temperature in the heating chamber reaches a predetermined value, the burner is intermittently operated and the combustion fan is rotated at a rotational speed less than the predetermined rotational speed. Cooker. A heating chamber accommodating food, a high frequency generator generating high frequency to be introduced into the heating chamber, a combustion chamber accommodating a burner, an air passage for interlocking the heating chamber and the combustion chamber, and a circulation fan for circulating air in the heating chamber. And a combustion fan forcibly sending combustion heat in the combustion chamber to the heating chamber via the air passage, and continuously operating the circulation fan during cooking, before and after the temperature in the heating chamber reaches a predetermined value. And a control device for changing and controlling the operation states of the burner and the combustion fan after the stationary device is reached, wherein the control device specifies that only the combustion pen is pre-rotated during high frequency heating. A method of controlling a heating cooker having a heating chamber accommodating food, a combustion chamber accommodating a burner, and an air barrel communicating the heating chamber and the combustion chamber, the method comprising: operating the burner in a predetermined operation mode to generate combustion heat; Directing the combustion heat from the combustion chamber to the heating chamber through the air passage in a predetermined rotation mode using a combustion fan, and continuously circulating air in the heating chamber using a circulation fan; Continuously measuring the temperature of the room; changing the operating mode of the burner and the rotating fan of the combustion fan when the measured temperature is above a predetermined value; And returning to the mode. 6. The control method of a heating cooker according to claim 5, wherein the burner and the combustion fan operate continuously when the measured temperature is lower than the predetermined value, and intermittently operate when the burner and the combustion fan are higher. 6. The control method of a heating cooker according to claim 5, wherein the rotation speed of the combustion chamber is reduced when the burner is intermittently operated when the measured temperature is equal to or greater than the predetermined temperature.