JPH04190017A - Heat-cooking apparatus - Google Patents

Abstract

PURPOSE:To reduce a preheating time and a heat-cooking time for foodstuffs by carrying out the heating operation of a heat source and rotating a hot air- circulating fan in one direction of forward and reverse rotations during a preheating operation while alternatingly rotating the hot air-circulating fan in the forward and reverse directions during a heat cooking operation. CONSTITUTION:A heating chamber 2 is provided therein with a heater 12 for feeding hot air and a hot air-circulating fan 13, and a microcomputer 32 is provided so that the heater 12 is permitted to generate heat and the hot air- circulating fan 13 is controlled to rotate in one direction of forward and reverse rotations during a preheating operation while the heater 12 is permitted to carry out a heating operation and the hot air-circulating fan 13 is controlled to alternatingly rotate in the forward and reverse directions during a heat cooking operation. In addition, the microcomputer 32 is so constituted as to change each time of the forward and reverse rotations of the hot air-circulating fan 13 according to the kinds of foodstuffs during a heat cooking operation. Furthermore, a motor 18 rotates forward the hot air-circulating fan 13, and a motor 19 rotates reversely the hot air-circulating fan 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cooking device for cooking food using a hot air circulation method.

(Conventional technology) Conventionally, as a heating cooker using the hot air circulation method,
There is one disclosed in Japanese Patent No. 6-96210. That is,
This device has a heater and a circulation fan installed at the rear of the heating chamber, and uses a condenser motor to alternately rotate the circulation fan forward and backward at regular intervals to send hot air into the heating chamber alternately from left and right. This structure allows the food stored in the heating chamber to be heated and cooked evenly.

(Three problems to be solved by the invention) In a hot air circulation type heating cooker, before cooking food, hot air is supplied to the heating chamber with no food stored in the heating chamber, and the temperature inside the heating chamber is raised to a predetermined temperature. (e.g. 180℃)
In some cases, preheating is performed to raise the temperature to a predetermined temperature in order to shorten the subsequent cooking time, but with the conventional configuration, there is a problem in that it takes time for the temperature in the heating chamber to rise to a predetermined temperature. According to the inventor's experimental results, the cause of this is that a certain amount of downtime is required between the circulation fan's rotation from normal rotation to reverse rotation and from reverse rotation to normal rotation, and during this period, the heating chamber of the circulation fan is This is thought to be because the supply of hot air to the heating chamber is significantly reduced or completely eliminated, and the temperature rise within the heating chamber slows down.

Additionally, hot air circulation type heating cookers are capable of cooking multiple types of foods, from small foods such as kutskies to large foods such as butter rolls. There is a problem in that it takes time to heat and cook large foods such as rolls. According to the inventor's experimental results, the reason for this is that when the circulation fan is rotated alternately forward and reverse at regular intervals, the heat capacity of small foods such as kutskies is small, so hot air is Even if the direction changes at regular intervals, sufficient heat is absorbed by the hot air in each direction, but large foods such as butter rolls have a large heat capacity, so they can be absorbed over a certain period of time, the same as for small foods. This is thought to be due to the fact that if the direction of the hot air was changed each time, the hot air in one direction would switch to the hot air in the other direction before sufficient heat was absorbed.

Therefore, a first object of the present invention is to provide a heating cooker that can preheat in a short time.

A second object of the present invention is to provide a cooking device that can cook foods in the shortest time depending on the type of food.

[Configuration of the Invention (Means for Solving the Problems) The heating cooker of the present invention is provided with a heating chamber for heating food stored therein, and a heat source for supplying hot air into the heating chamber. and a circulation fan, the heat source is operated to generate heat during preheating, and the circulation fan is rotated in one direction of forward and reverse rotation, and the heat source is operated to generate heat during cooking, and the circulation fan is alternately rotated between normal and reverse directions. It is characterized by a configuration in which a control means is provided to control the rotation in the reverse direction.

Further, it is preferable that the control means is configured to change the time for forward and reverse rotation of the circulation fan during cooking, depending on the type of food.

(Function) According to the cooking device of the present invention, during preheating, the circulation fan is rotated in one direction between forward and reverse rotations to supply hot air into the heating chamber. There is no more switching, and the temperature rise in the heating chamber does not slow down during that time.

If the time for forward and reverse rotation of the circulation fan is changed depending on the type of food, the hot air in each direction can sufficiently absorb heat into the food, regardless of the type of food.

(Example) An example of the present invention will be described below with reference to the drawings.

First, the overall schematic configuration will be described according to FIGS. 2 to 8. A heating chamber 2 is provided inside the main body 1, and a door 3 is pivotally installed at the front opening of the main body 1 in correspondence with the heating chamber 2.
An operation panel 4 is attached to the right side of the front opening. Further, in the back plate part 2a of the heating chamber 2, there is formed an intake port 5 which is located in the center and has a circular shape as a whole and is made up of a large number of through holes. 6. Air inlet port consisting of through holes and having an overall horizontally long rectangular shape.
6 is formed, and the upper plate portion 2b is formed with an exhaust lower which is located at the rear end and consists of a plurality of through holes. An exhaust duct 8 is formed in the upper plate portion 2b of the heating chamber 2 to guide exhaust gas from the exhaust lower to the outside of the main body 1, and a gas sensor 9 is attached to this in a manner corresponding to the exhaust lower. ing. Further, a fan casing 10 is attached to the back plate portion 2a of the heating chamber 2, thereby forming a fan chamber 11, and a heater 12 in the shape of a rectangular frame with ends as a heat source is installed in the fan chamber 11. A circulation fan 13 made of a centrifugal fan is also disposed, and a shaft 14 provided at the center of the circulation fan 13 passes through the fan casing 10 and is attached to a bearing 16 of the casing cover 15. It is inserted through and supported. A driven gear 17 is attached to the tip of the shaft 14 protruding from the bearing 16, and the driven gear 17 is sandwiched between the first and second motors 1, which are shaded coil type motors.
Drive gears 20 and 21 attached to rotating shafts 18a and 19a, respectively, are meshed with the driven gear 17.

On the other hand, as shown in FIGS. 2 and 3, the operation panel 4 is provided with a display section 22 such as a fluorescent display tube or a liquid crystal display located at the upper part, and a display section 22 located below the display section 22 for operation. Part 2
3 is provided. The operation unit 23 has "Auto 1", "
Automatic cooking keys 24, 25, 26, and 27 are arranged above and below with the characters ``Auto 2'', ``Auto 3'', and ``Auto 4'' written on them, respectively, and a ``Kutsuki key'' is located on the left side of the automatic cooking key 24. , cake" cooking menu items are listed, the left side of the automatic cooking key 25 lists the cooking menu items of "sweet bread, pizza", and the left side of the automatic cooking key 26 lists cooking menu items of "choux pastry, pie". Menu items are listed, and on the left side of the automatic cooking key 27 is “
Butter rolls are listed as a cooked menu item.

Further, in the operation unit 23, a manual cooking key 28 with the word "manual" written on it is attached to the lower part of the automatic cooking key 27, and a "△" character is attached to the left part of the manual cooking key 28.
A key for emphasis 29a with the symbol ``'' and a weak adjustment key 29b with the symbol ``'' are attached, and a time setting knob 30 is attached to the lower part of the manual cooking key 28. The words "temperature" are written on the lower side of the adjustment keys 29a and 29b, and the words "time" are written on the left side of the time setting knob 30. A start key 31 on which the word "start" is written is attached to the left side of the time setting knob 30 in the operating section 23.

Now, the electrical configuration will be described according to FIG. In the microcomputer 32 serving as the control means, a gas sensor 9 is connected to one manual port via an input circuit 33, and a temperature sensor 34 for detecting the temperature inside the heating chamber 2 or a temperature sensor 34 for detecting the temperature inside the heating chamber 2 is connected to the other input port via an input circuit 35. connected, and
A plurality of output and input terminals of the operation unit 23 are connected to the plural bit output ports. Furthermore, in the microcomputer 32, two output ports are connected to a drive circuit 36.
and 37 to the motors 18 and 19, respectively;
The other output port is connected to the heater] 2 via the drive circuit 38, the multi-bit output port is connected to the plural input terminals of the display section 22, and the other output port is connected to the ringer via the drive circuit 39. It is connected to an alarm device 40 such as the following.

The microcomputer 32 then controls the gas sensor 9.
Based on the information signals from the temperature sensor 34 and the operating section 23, the motor 18.19°bee 212 operates as described later.
1 display unit 22 and an alarm 40.

Next, the operation of this embodiment will be explained with reference to the time chart of FIG. 1 and the flow chart of FIG. 10.

Now, when the power is turned on to the microcomputer 32,
The microcomputer 32 starts its operation. First, the microcomputer 32 enters processing step S1 and performs a well-known initialization operation, whereby rOJ is displayed on the display section 22. The microcomputer 32 then proceeds to judgment steps S2 to S5 in which it judges whether or not the automatic cooking keys 24 to 27 have been pressed, but in any case, if it is judged as "NOJ" (no operation), it proceeds to judgment step S6. In this determination step S6, the microcomputer 32 determines whether or not the manual cooking key 28 has been suppressed, and when it determines rNOJ (no operation), the process returns to determination step S2.

Therefore, when the user presses one of the automatic cooking keys 24 to 27, the microcomputer 32 determines rYEsJ in the corresponding determination step of determination steps S2 to S5 and proceeds to the next step. Processing step S7
This corresponds to the corresponding processing steps from S10 to S10. For example, when the automatic cooking key 24 is suppressed, the microcomputer 32 goes to processing step S7, sets the temperature to 180°C, and turns on the first and second motors 18 and 1.
9 is set to 10 seconds, and the sensor constant α is set to α1, these are stored in a RAM (not shown), and when the automatic cooking key 25 is pressed, processing step S8 is performed. The temperature is set to 200°C, the alternating operation time of the first and second motors 18 and 19 is set to 10 seconds, and the sensor constant α is set to α2, and these are stored in a RAM (not shown), and the automatic operation is performed. When the cooking key 26 is pressed, the process goes to step S9, where the temperature is set at 230°C and the first and second motors 18 and 19 are turned on.
The alternating operation time is set to 15 seconds, and the sensor constant α
is set to α3 and stored in a RAM (not shown), and when the automatic cooking key 27 is depressed,
In processing step S10, the temperature is set to 180° C., the alternate operation time of the first and second motors 18 and 19 is set to 30 seconds, and the sensor constant α is set to α4, as shown in the figure. It is designed to be stored in RAM that is not used. Thereafter, the microcomputer 32 sets the flag F to "1" in processing step S11, and then proceeds to judgment step 512, in which it judges whether or not the start key 31 has been suppressed, and if it has not been pressed. "
NO" is determined, and the determination step S12 is repeated.

When the user presses the start key 31 (time T).

), the microcomputer 32 performs the judgment step S12.
Then, it is judged as “YESJ” and the process moves to judgment step 313.
Here, it is determined whether flag F is "1" (automatic cooking) or not (manual cooking), and at this time, as described above, flag F has been set to "1" in processing step S11. It is judged as rYESJ (automatic cooking) and the process goes to output step S14. In this output step S14, the microcomputer 32 sets the set temperature to 180° C., which is a predetermined temperature, and stores this in the RAM, and also energizes the heater 2 via the drive circuit 38 to operate the heater 2 to generate heat (see FIG. 1). <a) # reference) and the first motor 18 is energized and rotated via the drive circuit 36 (see Figure
b)).

As a result, the drive gear 20 is rotated by the first motor 18 in the direction of arrow A, which is counterclockwise in FIG.
The driven gear 17 meshing with the driving gear 20 is rotated in the clockwise direction of the arrow B in the figure, and the circulation fan 13 is rotated to the fifth position.
As shown in the figure, it is rotated in the direction of arrow B, which is the forward rotation direction. Therefore, the circulation fan 13 generates hot air together with the heater 12, supplies it into the heating chamber 2 through the air supply port 6.6, and then circulates it so that it is sucked into the fan chamber 11 through the intake port 5. Thus, a preheating operation is performed to raise the temperature inside the heating chamber 2. The microcomputer 32 then goes to judgment step S15 and determines whether the heating chamber 2
It is determined whether or not the temperature within the temperature sensor 34, that is, the temperature detected by the temperature sensor 34, has reached 180°C, and when rNOJ, output step 5 is performed.
14 to continue the preheating operation. After that, heating chamber 2
When the internal temperature rises to 180° C. (time T), the microcomputer 32 determines rYE in judgment step S15.
It is determined that SJ is present, and the output step S16 is performed. Here,
Stopping the power supply to the heater 12 via the drive circuit 38,
Energization to the first motor 18 via the drive circuit 36 is stopped, thereby terminating the preheating operation, and at the same time, electricity is supplied to the alarm 40 for a short time via the drive circuit 39 to generate an alarm sound.

After that, the microcomputer 32 performs a judgment step S.
17, the process waits until the start key 31 is pressed.

Therefore, when the user stores the food together with the container in the heating chamber 2 and presses the start key 31 (time T
2), the microcomputer 32 performs the output step S1
8, here, the cooking conditions corresponding to the pressed automatic cooking keys 24 to 27 are stored in the RAM.
Read from and execute. That is, microcomputer 3
2, first, based on the cooking conditions stored in the RAM,
As shown in FIG. 1(a), the heater 12 is energized to start the heat generating operation, and as shown in FIG. 1(b), the first motor 18 is energized and the circulation fan 13 is activated in the same manner as described above.
Now rotates in the direction of arrow B, which is the forward rotation direction,
As shown in FIG. 7, hot air is supplied into the heating chamber 2 through the air supply port 6.6 and then circulated so as to be drawn into the fan chamber 11 through the air intake port 5. Thereafter, the microcomputer 32 turns off the power to the first motor 18 after a set time T stored in the RAM (time T3), and after a short rest period, turns off the power to the second motor 19 via the drive circuit 37. (time T4), the second motor becomes energized (time T4)]9
rotates the drive gear 21 in the clockwise direction of arrow C in FIG.

When the drive gear 21 is rotated in the direction of arrow C in FIG. 6, the driven gear 17 meshes with the drive gear 21.
is rotated in the counter-arrow B direction, which is counterclockwise in the figure, and the circulation fan 13 is rotated in the counter-arrow B direction, which is the reverse rotation direction. Therefore, the circulation fan 13 generates hot air together with the heater 12, supplies it into the heating chamber 2 through the air supply ports 6, 6, and then circulates it so that it is sucked into the fan chamber 11 through the intake port 5. It becomes like this. Thereafter, the microcomputer 32 de-energizes the second motor 19 after the set time T stored in the RAM has elapsed, and then energizes the first motor 18 again after a short rest period. Thereafter, the circulation fan 13 is alternately rotated forward and reverse in the same manner. In this case, when the circulation fan 13 is rotated in the direction of arrow B, which is the forward rotation direction, the hot air flows from the air outlet 6.6 into the heating chamber 2 to the left as shown by the arrow, as shown in FIG. When the hot air is blown out in an oblique direction and the circulation fan 3 is rotated in the opposite direction of arrow B, as shown in FIG. The air is blown diagonally to the right as shown by arrow E.

By the way, as mentioned above, the automatic cooking keys 24°, 25.
When 26 or 27 is suppressed, processing step S7
．． The corresponding cooking conditions are stored in the RAM by S8, S9, or S10. Therefore, for example, when the automatic cooking key 24 of "Auto 1" is depressed, the aforementioned set temperature is set to 180°C. At the same time, the set time T becomes 10 seconds, and similarly, when the automatic cooking key 25 of "Auto 2" is suppressed, the set temperature becomes 200 seconds.
℃, the set time T becomes 15 seconds, and when the automatic cooking key 26 of "Auto 3" is pressed, the set temperature becomes 230 degrees Celsius, the set time T becomes 15 seconds, and the setting time T becomes 15 seconds. When the automatic cooking key 27 of "4" is depressed, the set temperature becomes 180° C. and the set time T becomes 30 seconds. And the microcomputer 32
When the heater 12 is in operation to generate heat, the heater 2 is intermittently energized so that the temperature in the heating chamber 2 reaches the set temperature of 180°C, 200°C, or 230°C based on the temperature detected by the temperature sensor 34. Then, automatic cooking operation is performed.

Now, the microcomputer 32 performs the output step 81.
8, the process moves to judgment step S19, where it is judged whether the detected value of the gas sensor 9 has reached a constant a.

That is, when food is cooked in the heating chamber 2, a portion of the hot air is exhausted to the outside as exhaust air through the exhaust lower and the exhaust duct 8, but at this time, the gas sensor 9 is not included in the exhaust gas. Gas, that is, gas released from food, is detected, and the detected value becomes a constant α specific to the food at the end of cooking the food. and,
As mentioned above, the constant α depends on the type of food (automatic cooking key 2
4 to 27) according to α1. α2. α3 or α
Set to 4. Therefore, in the judgment step S19, the microcomputer 32 determines that the detected value of the gas sensor 9 is a constant α1. α2. α3 or α
It is determined whether or not the number is 4. When it is determined that the number is 1-NOJ, the process returns to the output step 31g and the automatic cooking operation is continued. Then, when the cooking of the food is completed, the microcomputer 32 determines "Y" in judgment step S19.
ES" and output step S20, in which the memory contents of the RAM are cleared, the flag F is reset to "0", the heater 12 is turned off, and each motor 18,
19 is turned off, thereby terminating the automatic cooking operation.

Although not shown in the flowchart S20 of FIG.
At 0, the alarm 40 is operated only for a short time.

The above describes the case of automatic cooking, but
In the case of manual cooking, the process is as follows.

That is, if none of the automatic cooking keys 24 to 27 are pressed, the microcomputer 32 repeatedly performs the determination steps S2 to S6. Therefore, when the user presses the manual cooking key 28, the microcomputer 32 selects rYESJ in judgment step S6.
It is determined that the process proceeds to step S21, and the set temperature t is set. is set to 200°C and stored in RAM. The microcomputer 32 then proceeds to judgment step S22, in which it judges whether or not the emphasis clause key 29a has been pressed, and when it is determined that rNOJ is pressed, the microcomputer 32 proceeds to judgment step 52B, in which the weak adjustment key 29b is pressed. It is determined whether or not a suppression operation has been performed, and when the determination is "NO", the process proceeds to determination step S24.Here, it is determined whether or not the time setting knob 30 has been rotated, and when it is determined that rNOJ, the process proceeds to determination step S22. I'm starting to go back.

Thus, the microcomputer 32 performs processing step S.
21 is the set temperature t. When the temperature is set to 200°C, the display section 22 displays "Manual J, r200°C", and the user sees this and presses the emphasis key 29a if he wants to increase the temperature. Press and operate, and vice versa.
If it is desired to decrease the temperature, press the weak adjustment key 29b. When the emphasis clause key 298 is pressed, the microcomputer 32 performs a judgment step 522.
It is determined that rYESJ, and the process moves to step S25, where the set temperature is set to t. Add 10℃ to (200℃) and t
It is stored in RAM as o-210°C. If the emphasis clause key 29a continues to be pressed, the microcomputer 32 goes through determination steps S24 and S22 and returns to processing step S25, so that the set temperature t is maintained. 10°C will be added each time. Conversely, when the weak adjustment key 29b is pressed, the microcomputer 32 determines rYEsJ in determination step 523, and proceeds to processing step S26, where the set temperature t is set.

Subtract 10°C from (200°C) and get t. Store it in RAM as -190°C.

If the pressing operation of the weak adjustment key 29b is continued, the microcomputer 32 executes judgment step S24.
．． Since the processing step S26 is reached through S22 and S23, the set temperature t. will be subtracted by 10°C each time. After that, the user selects the time setting knob 30.
When the rotation operation is performed, the microcomputer 32 determines rYESJ in determination step S27, and proceeds to the next processing step 328. In this processing step 28, the microcomputer 32 stores in the RAM the set temperature to set in the processing step S25 or S26, and also stores the cooking time set by the time setting knob 30 in the RAM, and then Processing step S
After the flag F is reset to "0" in step 29, the process moves to judgment step s12.

Then, when the user presses the start key 31,
In decision step 512, microcomputer 32 determines whether
It is judged as YESJ and the process goes to judgment step 81B. At this time, since the flag F is reset to "0" (manual cooking is selected), it is judged as rNOJ and the process goes to output step S.
It becomes 29.

The microcomputer 32 performs this output step S29.
, the heater 12 is energized to perform heat generation operation, the first motor 18 is energized for a certain period of time, and after a short period of rest, the second motor 191 is energized for a certain period of time; After the rest period, the first motor 18 is repeatedly energized, and the food stored in the heating chamber 2 is heated and cooked by alternating hot air as shown in FIGS. 7 and 8. Become. Thereafter, the microcomputer 32 proceeds to processing step S30, in which the microcomputer 32 counts down the set time (by a counter), and then proceeds to judgment step 531, in which
Here, it is determined whether the set time has reached zero by countdown, and if the determination is "NO", the process returns to output step S29 and the manual cooking operation is continued. Thereafter, when the set time countdown ends and reaches zero, the microcomputer 32 determines rYEs in judgment step S31.
J is determined, the output step S20 is reached, and the manual cooking operation ends.

According to this embodiment, the following effects are achieved. That is, during the preheating operation to raise the temperature inside the heating chamber 2, the circulation fan 13 is rotated in the forward direction, which is one of the forward and reverse rotations. Unlike when rotating, there is no time loss when switching from forward rotation to reverse rotation and from reverse rotation to forward rotation, and the slowing of the temperature rise in the heating chamber 2 due to the time loss is eliminated. Therefore, the temperature inside the heating chamber 2 can be raised to a predetermined temperature in a short time. In addition, during automatic cooking operation, the operating time T of the forward rotation and reverse rotation of the circulation fan 13 is varied depending on the type of food, so for example, in the case of small foods such as kutsuki, the operating time T is changed depending on the type of food. The operating time T is set to 10 seconds, and in the case of large foods such as butter rolls, the operating time T is set to 30 seconds. Therefore, in the case of small foods with a small heat capacity such as kutskies, changing the direction of hot air is short. Even if it takes a long time, the food will absorb enough heat, and in the case of large foods with a large heat capacity, such as butter rolls, it will take a relatively long time to change the direction of the hot air so that the food can absorb enough heat. Therefore, each type of food can be cooked in the shortest time possible.

Moreover, in order to rotate the circulation fan 13 in the forward and reverse directions, two small and inexpensive corner-coiled motors 18 and 19 are used, instead of the conventional large and expensive single motor. Compared to using a capacitor motor,
It is also advantageous in terms of space and price.

In the above embodiment, when the circulation fan 13 is rotated by the first motor 18 and the second motor 19 via the driving gears 20 and 21 and the driven gear 17, when the - blade side is rotated, the other side is also rotated. If the rotation occurs or if such a situation is undesirable, the connection between the first motor 18 and the drive gear 20 and between the second motor 19 and the drive gear 21
An electromagnetic clutch may be provided between the two.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings; for example, the circulation fan may be rotated in forward and reverse directions by a single motor, without departing from the scope of the invention. Of course, it can be implemented with appropriate modifications.

[Effects of the Invention] Since the present invention is as explained above, the following effects can be obtained.

According to the heating cooker according to claim 1, even if it is of a hot air circulation type, the circulation fan is rotated in one direction of forward and reverse rotation during preheating, so that the temperature in the heating chamber can be reduced in a short time. The temperature can be raised to a predetermined temperature within hours.

According to the heating cooker according to claim 2, when cooking food, the alternating forward and reverse rotation times of the circulation fan are changed depending on the type of food, so that small-sized cookers such as kutsuki etc. The supply time of hot air in each direction is changed depending on the type of food and large foods such as butter rolls. Cooking can be done in the shortest possible time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a time chart for explaining the operation, Fig. 2 is a front view of the whole, Fig. 3 is a front view of the operation panel, and Fig. 4 is a longitudinal section near the heating chamber. A side view, Figure 5 is a front view of the heating chamber, Figure 6 is a rear view of the heating chamber, and Figure 7 is a front view of the heating chamber.
8 and 8 are cross-sectional plan views of the heating chamber in different operating states, FIG. 9 is a block diagram showing the electrical configuration, and FIG. 10 is a flow chart for explaining the operation. In the drawings, 1 is the main body, 2 is the heating chamber. 5 is an intake port, 6 is an air supply port, 7 is an exhaust port, 9 is a gas sensor, 11 is a fan chamber, 1
2 is a heater, 13 is a circulation fan, ] 8 is a first motor, ] 9 is a second motor, 22 is a display section, 23 is an operation section,
24 to 27 are automatic cooking keys, 28 is a manual cooking key, 3
2 is a microcomputer (control means), and 34 is a temperature sensor. Figure 6 Figure 9 Figure 10

Claims (1)

[Scope of Claims] 1. A heating chamber for cooking food stored therein, a heat source and a circulation fan for supplying hot air into the heating chamber, and a heat source that operates to generate heat during preheating. Heating comprising a control means for rotating the circulation fan in one of forward and reverse rotations, causing the heat source to generate heat during cooking, and controlling the circulation fan to alternately rotate in the forward and reverse directions. Cooking device. 2. The heating cooking device according to claim 1, wherein the control means is configured to change the forward and reverse rotation times of the circulation fan depending on the type of food during cooking.