JPH11325478A - Cooker - Google Patents

Abstract

(57) [Problem] To provide a heating chamber that supplies hot air into a heating chamber and cooks the heating, so that uneven heating can be prevented as much as possible. A hot air supply device (16) provided behind a rear wall (12a) of a heating chamber (12) includes a casing (17) and two fans (18) arranged side by side in the casing (17).
a, 18b, a heater 19 provided to surround the fans 18a, 18b, and the fans 18a, 18b.
and a fan driving motor for rotating b.
Since the two fans 18a and 18b for supplying hot air are used, the swell of the hot air supplied into the heating chamber 12 is reduced as compared with the case where only one fan is used. The generation of uneven heating can be prevented as much as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker having a function of heating and cooking an object to be heated by supplying hot air into a heating chamber.

[0002]

Conventionally, in a heating cooker such as an electric oven using an electric heater or a microwave oven having an oven function, the radiant heat from a heater such as a sheathed heater is used to cover the inside of the heating chamber. A method of heating a heated object and a heating method of a hot-air circulation type in which heat of a heater is circulated by a fan to heat an object to be heated by hot air have been commercialized.

FIG. 20 shows a microwave oven with an oven function employing a heating method of a hot air circulation system. In FIG. 20, a hot air supply device 2 is disposed behind a rear wall 1a of the heating chamber 1. The hot-air supply device 2 includes a fan 3, a heater 4 arranged to surround the fan 3, a casing 5 for accommodating the fan 3, and a fan driving motor (not shown) provided on the rear side of the casing 5. ). In this case, the heating chamber 1 has a configuration in which a square plate 6 on which an object to be heated is placed can be stored in upper and lower stages.

The rear wall 1a of the heating chamber 1 has a suction port 7 formed substantially at the center and a discharge port 8 formed at the outer periphery thereof. The inside air is sucked into the casing 5 from the suction port 7, and the air heated by the heater 4 in the casing 5 is supplied as hot air from the discharge port 8 into the heating chamber 1,
The heated object on the square plate 6 is heated and cooked by the hot air.

When the fan 3 rotates in the direction of arrow A in FIG. 21, the air around the blades 3a of the fan 3 flows in a direction determined by the combination of the centrifugal force and the force in the rotational direction (FIG. 21).
(See arrow B). This arrow B
When the hot air is discharged from the discharge port 7 into the heating chamber 1, the force in the direction of rotation becomes “undulation”. In FIG. 20, when the fan 3 rotates in the direction of the arrow A (counterclockwise), the hot air is also discharged into the heating chamber 1 in the direction of the arrow A as shown by the arrow C. Since this hot air has directionality, there is a problem in that an object to be heated accommodated in the heating chamber 1 tends to have uneven heating.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a heating cooker in which heating air is supplied into a heating chamber and cooking is performed. It is in.

[0007]

In order to achieve the above object, a heating cooker according to the present invention comprises a heater behind a heating chamber for accommodating an object to be heated, and heat generated by the heater as hot air. A hot air supply device having a fan to be supplied into the heating chamber and a fan drive motor for rotating the fan is provided, and a plurality of fans of the hot air supply device are provided.

According to the above-described means, by using a plurality of fans of the hot air supply device, the swell of the hot air supplied into the heating chamber can be reduced, and as a result, uneven heating occurs in the object to be heated. That can be prevented as much as possible.

In the present invention, it is preferable that the heater, the plurality of fans, and the fan driving motor of the hot air supply device are unitized. Further, the heater may be constituted by a single heater provided to surround a plurality of fans, or may be configured to surround each fan independently.
A plurality of fans can be provided corresponding to each fan. When the two fans are arranged side by side, it is preferable that the rotation directions of the left and right fans be opposite to each other.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a microwave oven with an oven function will be described below with reference to FIGS. First, in FIG. 1 showing the overall appearance, a main body 11 of a heating cooker has a rectangular box shape, and a heating chamber 12 having an open front surface is formed inside. A door 13 for opening and closing the front opening of the heating chamber 12 is provided on the front part of the main body 11 so as to be rotatable in the vertical direction, and an operation panel 14 is provided on the right side of the door. Square plate support portions 15 are provided on both left and right side walls of the heating chamber 12, and a single plate (not shown) can be stored through the square plate support portions 15.

A hot air supply device 16 is provided behind the rear wall 12a on the rear side of the heating chamber 12. As shown in FIGS. 2 and 3, the hot air supply device 16 includes a casing 17 having a rectangular shape that is long in the left-right direction, and two fans 18 a, 1 arranged side by side in the casing 17.
8b, one heater 19 provided to surround the two fans 18a, 18b in the casing 17, and each fan 18a,
Two fan drive motors 20 (only one is shown in FIG. 3) provided to rotationally drive the motor 18b are unitized. Each fan drive motor 20 includes:
A self-cooling fan 21 for self-cooling is provided.

The terminal 19a of the heater 19 is disposed on the right side of the casing 17, and the heater 19 has a vertically symmetric shape. A rear wall 12a of the heating chamber 12 has a suction port 2 at a site corresponding to each of the fans 18a and 18b.
2 are formed, and discharge ports 23 are formed above and below these suction ports 22. The operation panel 14 is provided with a switch input unit 24 such as a start switch 24a and a menu setting switch 24b, and a display 25.

FIG. 4 shows an electrical configuration. Power plug 3 connected to 100V commercial AC power supply
0 terminal 30a is open / closed of fuse 31 and door 13.
The door switch 32, a relay switch 33a that opens / closes in response to the closing, and one end of the primary winding 34a of the high-voltage transformer 34 are sequentially connected via one bus L1. The primary winding 34a is sequentially connected via a door switch 35 which opens / closes in response to opening / closing, the other bus L2, and a relay switch 36a.
Is connected to the other end. A common connection point between the door switch 32 and the relay switch 33a;
And a common connection point between the other bus L2 and the door 1
A short switch 37 that closes / opens the switch 3 in reverse according to the opening / closing of the switch 3 is connected.

An interior lamp 38 is connected between the buses L1 and L2, and a heater 19 and a relay switch 39 are connected.
a, a series circuit of the fan drive motor 20 and the relay switch 40a, and a series circuit of the fan drive motor 20 and the relay switch 41a. The driving circuit 43 of the magnetron 42 is connected to the secondary winding 34b of the high-voltage transformer 34. In addition,
The high voltage transformer 34 and the magnetron 42 are disposed in a machine room (not shown) formed behind the operation panel 14.

The relay switches 33a, 36a, 3
9a to 41a are all configured to be normally open, and correspond to relay coils 33b, 36b, 39b to 41b, respectively.
These constitute the relays 33, 36, 39 to 41. These relays 33, 36, 39 to 41 are turned on / off by a relay drive circuit (not shown) provided in the control circuit 44.
The control is turned off (the relay switch is closed when turned on).

Further, both terminals 30a, 3 of the power plug 30
A DC constant voltage power supply circuit 45 including a step-down transformer, a rectifier circuit, and the like is connected between 0b. This DC constant voltage power supply circuit 45 supplies DC power to the control circuit 44 and the like.

The control circuit 44 includes a microcomputer and the above-described relay drive circuit. The relay circuit 33 is controlled based on an input signal from the switch input section 24 and a control program of the microcomputer. , 36, and 39 to 41, the magnetron 42, the heater 19, and the fan drive motor 20 are controlled to perform heating cooking, and the display 25 is also controlled.

In the above-described configuration, when performing oven cooking, the heating chamber 12 is placed in a state in which the square dish on which the object to be heated (not shown) is placed is placed on the square dish support 15 in the heating chamber 12.
In this state, the door 13 is closed, and in this state, the menu of the oven cooking is set by operating the switch input unit 24, the cooking time and the like are set, and then the start switch 24a is operated.

Based on this, the control circuit 44 controls the relay 3
By turning on 3, 39 to 41, the interior lamp 38 is turned on, the heater 19 is energized to generate heat, and each fan drive motor 20 is energized to set each fan 1
8a and 18b are rotated. In this case, two fans 1
8a and 18b are both rotated in a counterclockwise direction (see arrow D in FIGS. 1 and 2) when viewed from the front.

Here, the air in the heating chamber 12 is sucked into the casing 17 from the suction port 22 by the blowing action of the fans 18a and 18b, and the air heated by the heater 19 in the casing 17 is converted into hot air. Discharge port 23
Is supplied into the heating chamber 12, and the heated object on the square plate is heated and cooked by the hot air. Then, when the set cooking time has elapsed, the control circuit 44 sets the relays 33 and 39 to
By turning off 41, the interior lamp 38 is turned off, and the heater 19 and each fan drive motor 20 are turned off.

According to the first embodiment, the following operation and effect can be obtained. First, the fans 18a and 18b for supplying hot air into the heating chamber 12
2 are provided side by side on the right and left in the rear part of the heating chamber 12, unlike the case where only one fan is provided, the swell of the hot air supplied into the heating chamber 12 is reduced, and as a result, The generation of uneven heating in the heated object can be prevented as much as possible.

Further, since the casing 17, the two fans 18a and 18b, the heater 19, and the two fan driving motors 20 in the hot air supply device 16 are unitized, the assembling to the main body 11 is facilitated, and as a result, Costs can be reduced.

Further, since the heater 19 is constituted by a single heater provided so as to surround the two fans 18a and 18b, the cost of parts of the heater 19 can be reduced while preventing the occurrence of uneven heating. In addition, assembly costs can be reduced.

FIGS. 5 and 6 show a second embodiment of the present invention. The second embodiment differs from the first embodiment in the following points. That is, the hot air supply device 16
Is constituted by one heater provided so as to surround the two fans 18a and 18b, but the terminal 48a is located in the middle of the two fans 18a and 18b and located below the casing 17. The heater 48 has a left-right symmetrical shape.

In the second embodiment having such a configuration, since the temperature distribution by the heater 48 is substantially equal on both the left and right sides, the temperature of the hot air supplied into the heating chamber 12 by the left and right fans 18a and 18b is also reduced. It becomes almost even and the balance of the hot air can be taken, so that the occurrence of uneven heating can be further prevented.

FIGS. 7 and 8 show a third embodiment of the present invention. The third embodiment is similar to the first and second embodiments described above.
The following points are different from the embodiment. That is, the heaters 49 and 50 in the hot air supply device 16 are connected to the left and right fans 1.
Two are provided so as to independently surround 8a and 18b. The heaters 49 and 50 are substantially circular and have the same shape, and are arranged symmetrically so that the terminals 49a and 50a are located below the corresponding fans 18a and 18b. I have.

As shown in FIG. 8, the heaters 49 and 50 are controlled by relays 51 and 5 by a control circuit 44, respectively.
2 are independently controlled. The relay switches 51a, 52a of these two relays 51, 52
Also, the relays 51 and 52 are configured to be normally open, and the corresponding relay coils 51b and 52b form the relays 51 and 52, respectively.

In the third embodiment having such a configuration, the heaters 49 and 5 are provided corresponding to the fans 18a and 18b.
Since 0 is provided, and both heaters 49 and 50 are arranged in the same shape and symmetrically to the left and right, it is possible to further improve the balance between the left and right heat amounts.

In addition, since the respective heaters 49 and 50 are controlled independently, it is easier to balance the amounts of heat on the left and right. For example, the structure of the heating chamber 12 is slightly
In the case of deviating from the left-right symmetry, or in the case where the temperature distribution in the heating chamber 12 is not uniform left and right due to the difference in the structure around the heating chamber 12, the two heaters 49 and 50 are adjusted so as to correct the characteristics. By changing either one of the energization rates, the temperature distribution can be made as uniform as possible.
Thereby, the occurrence of uneven heating can be further prevented.

FIG. 9 shows a fourth embodiment of the present invention. The fourth embodiment differs from the third embodiment in the following points. That is, the two heaters 49, 50
Are configured to be simultaneously controlled to be turned on and off via one relay 51.

In the fourth embodiment having such a configuration, while only two heaters 49 and 50 are used, only one relay 51 for driving the heater is required, and the circuit configuration is simplified accordingly. become. Also, in this case,
Since the two fan driving motors 20 and 20 are controlled independently, when the temperature distribution in the heating chamber 12 is not uniform left and right, the third power supply ratio is changed by changing the power distribution ratio between them. It is possible to obtain substantially the same operation and effect as the embodiment.

FIG. 10 shows a fifth embodiment of the present invention. The fifth embodiment differs from the third embodiment in the following points. That is, the two fan driving motors 20 and 20 are configured so that the power cutoff is simultaneously controlled via one relay 40.

In the fifth embodiment having such a structure, while only two fan driving motors 20, 20 are used, only one relay 40 for driving the heater is required, and the circuit is accordingly increased. The configuration is simplified. Also, in this case, since the two heaters 49 and 50 are configured to be independently controlled, if the temperature distribution in the heating chamber 12 is not uniform left and right, the energization ratio of these heaters is changed. In this case, substantially the same operation and effect as those of the third embodiment can be obtained.

FIG. 11 shows a sixth embodiment of the present invention. The sixth embodiment differs from the first and third embodiments in the following points. That is, the square dish support portions 15 are provided on the left and right side walls of the heating chamber 12 in two vertical stages, and the heating chamber 12 includes the square dish support portions 1.
5, so that the square plate 55 can be stored in two upper and lower tiers. The hot air supply device 16 has the configuration of the third embodiment. In the sixth embodiment having such a configuration, a large number of dishes can be cooked at a time by cooking using the square plate 55 in two stages.

FIGS. 12 and 13 show a seventh embodiment of the present invention. The seventh embodiment differs from the sixth embodiment in the following points. That is, the upper heater 56 is provided on the ceiling 12 b of the heating chamber 12. In this case, the suction ports 2 corresponding to the fans 18a, 18b
2 and the upper discharge port 23 are set so as to be located between the upper and lower square plates 55, 55, and the interval dimension H1 between the upper and lower square plates 55 is 55 The distance between the plate 55 and the upper heater 56 is set to be larger than the distance H2.

In the case where the square plate 55 is set in the upper and lower stages for cooking, the hot air discharged from the discharge port 23 mainly emits the upper and lower square plates 55, 55 as shown by an arrow E in FIG.
The object to be heated 57 placed on the lower square plate 55 is heated mainly by the heat of the hot air. The object to be heated 57 placed on the upper square plate 55 is mainly heated by the heat of the upper heater 56.

In this case, during heating cooking, the upper heater 56
Can be full energization or intermittent energization, and
Heater 49, 50 for hot air and motor 2 for driving fan
0 and 20 may be left and right simultaneous energization or left and right alternating energization.

In the seventh embodiment, the square plate 55
Even when cooking is set in two upper and lower stages, the heated object 57 of the upper and lower square dishes 55 can be cooked as effectively as possible by the hot air and the upper heater 56.

The distance H1 between the upper square plate 55 and the lower square plate 55 is determined by the upper square plate 55 and the upper heater 5.
6, the heating target 57 of the upper square plate 55 approaches the upper heater 56, and the heating efficiency of the upper heater 56 is improved. In addition, by ensuring a large interval H1 between the upper square plate 55 and the lower square plate 55, the hot air discharged from the discharge port 23 allows the heated object 5 of the lower square plate 55 to be heated.
7 can be prevented as much as possible, thereby preventing the object to be heated 57 from being partially scorched and drying.

FIGS. 14 and 15 show an eighth embodiment of the present invention. The eighth embodiment differs from the third and sixth embodiments in the following points. That is, instead of the relay switches 40a and 41a, the triac 6
0 and 61 are connected, and respective gate terminals of these triacs 60 and 61 are connected to the control circuit 44. By controlling the timing at which the triac 60 is turned on by the control circuit 44 and controlling the timing at which the triac 61 is turned on, and controlling the timing at which the triac 61 is turned on, the right fan driving motor 20 is controlled in phase, thereby controlling the phase. The rotation speed of each fan drive motor 20 and, consequently, the rotation speed of each fan 18a, 18b are variably controlled.

The rotation directions of the left fan driving motor 20 and the fan 18a are set clockwise as viewed from the front (see arrow F1 in FIG. 15), and the right fan driving motor 20 and the fan 18b are rotated in the clockwise direction. The rotation direction is set in a counterclockwise direction when viewed from the front (see the arrow F2 in FIG. 15). Further, the upper discharge ports 23 corresponding to the left and right fans 18a and 18b are set so as to be located above the upper square plate 55.

In the above configuration, for example, when the rotation speed of the right fan driving motor 20 is set to be higher than that of the left fan driving motor 20, the discharge is performed from the upper right discharge port 23. The hot air is stronger than the hot air discharged from the upper left discharge port 23 (FIG. 1).
(See arrows G1 and G2 of No. 5), the hot air as a whole flows to the left.

In the eighth embodiment, the flow of hot air in the heating chamber 12 can be controlled by controlling the rotation speeds of the left and right fan driving motors 20. In this case, the rotation direction of the left fan 18a is set in the clockwise direction, and the rotation direction of the right fan 18b is set in the counterclockwise direction, and the wind direction is determined by the wind pressure of the fans 18a, 18b. Therefore, the direction of the hot air can be set relatively easily.

Accordingly, by controlling the flow rate of the hot air in the heating chamber 12 by controlling the rotation speeds of the left and right fan driving motors 20 as described above, the temperature distribution and the amount of the hot air in the heating chamber 12 can be reduced. It is possible to set the temperature suitable for the chamber 12, and it is possible to further prevent the occurrence of uneven heating.

FIGS. 16 and 17 show a ninth embodiment of the present invention. The ninth embodiment differs from the third embodiment in the following points. That is, both the left and right fans 18a, 1 are provided in the casing 17 of the hot air supply device 16.
8b, a partition plate 6 extending in the vertical direction
3 are provided.

In the ninth embodiment having such a configuration, it is possible to prevent the winds from the left and right fans 18a and 18b from being mixed in the casing 17 as much as possible. Can be discharged independently of each other.

Incidentally, the left and right fans 18a, 18b
If the wind mixed in the casing 17, the amount of hot air discharged from the discharge port 23 is likely to decrease, or the wind is likely to be short-circuited (short-circuited), which may lower the efficiency. In this regard, in the present embodiment, as described above, both the left and right fans 18a,
Since it is possible to prevent the wind caused by the air 18b from being mixed in the casing 17, it is possible to perform efficient heating and cooking.

FIG. 18 shows a tenth embodiment of the present invention. The tenth embodiment differs from the ninth embodiment in the following points. That is, air guide plates 64a and 64b are provided in the upper part of the casing 17 of the hot air supply device 16 at the upper right of the left fan 18a and the upper left of the right fan 18b, respectively. These air guide plates 64
The positions of a and 64b are near the discharge ports 23 corresponding to the fans 18a and 18b. In this case, the rotation direction of the left fan 18a is clockwise, and the right fan 1
The rotation direction of 8b is set counterclockwise.

In the tenth embodiment having the above-described structure, the wind generated by the left fan 18 a is
4a, the wind from the discharge port 23 is guided into the heating chamber 12 from the discharge port 23, and the wind from the right fan 18b hits the right air guide plate 64b to be guided from the discharge port 23 into the heating chamber 12 so that the ninth embodiment It is possible to obtain substantially the same operation and effect as the example.

FIG. 19 shows an eleventh embodiment of the present invention. The eleventh embodiment differs from the above-described seventh embodiment (see FIGS. 12 and 13) in the following points. That is, the left and right fans 1 are provided on the rear wall 12a of the heating chamber 12.
Vent holes 66a and 66b are formed in portions corresponding to 8a and 18b, but no vent holes are formed in other portions.

In this configuration, the left and right fans 18a,
18b is rotated alternately, and the two heaters 49 and 50 are
Power is supplied to the fans 18a and 18b alternately or simultaneously. For example, when the right fan 18b is rotated counterclockwise, hot air heated by the heaters 49 and 50 flows into the heating chamber 12 from the left ventilation port 66a as shown by an arrow I in FIG. After being discharged, the air in the heating chamber 12 is sucked into the casing 17 from the right ventilation port 66b. Conversely, when the left fan 18a is rotated clockwise, the hot air heated by the heaters 49 and 50 is discharged into the heating chamber 12 from the right vent 66b, contrary to the above. And
The air in the heating chamber 12 is sucked into the casing 17 from the left vent 66a.

In the eleventh embodiment as well, uneven heating can be prevented as much as possible by alternately rotating the left and right fans 18a and 18b. in this case,
The openings corresponding to the left and right fans 18a, 18b may be only the ventilation ports 66a, 66b, and there is an advantage that it is not necessary to separately form the suction port and the discharge port.

In the eleventh embodiment, the hot air discharged from the vents 66a, 66b is
5 is effective when the bottom of the object to be heated of the upper square plate 55 is excessively scorched. For example, in the case of a small type in which the distance between the upper and lower square plates 55 cannot be large. It is effective for

By making the number of revolutions of the left fan driving motor 20 different from the number of revolutions of the right fan driving motor 20, it is possible to finely adjust the degree of burning. Further, for example, when the outputs of the two heaters 49 and 50 are small, the amount of heat can be secured by energizing the two heaters simultaneously, and when the outputs of the two heaters 49 and 50 are large, By energizing alternately,
High temperature can be ensured even with one piece.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows. The number of fans in the hot air supply device 16 may be three. In addition, only one fan drive motor 20 is used, and one fan drive motor 20 is used.
A configuration in which a plurality of fans are rotated may be employed.

[0056]

As is clear from the above description, according to the present invention, the following effects can be obtained. Claim 1
According to the heating cooker described above, by using a plurality of fans for supplying hot air, the swell of the hot air supplied into the heating chamber is reduced, and as a result, uneven heating of the object to be heated is generated. It can be prevented as much as possible.

According to the cooking device of the second aspect, the heater, the plurality of fans, and the fan driving motor are unitized as a unit of the heater of the hot air supply device, so that the assembling becomes easy.
As a result, the cost can be reduced.

According to the third aspect of the present invention, the heater is constituted by a single heater provided so as to surround the plurality of fans. Costs and assembly costs can be reduced. According to the cooking device of claim 4,
Since the temperature distribution by the heater is substantially equal on both the left and right sides, the temperature of the hot air supplied into the heating chamber is also substantially equal, so that the hot air can be balanced and the occurrence of uneven heating can be further prevented.

According to the heating cooker of the fifth aspect, by providing a plurality of heaters corresponding to each fan, it is possible to improve the balance of heat quantity, and further prevent the occurrence of uneven heating. become. According to the heating cooker of the sixth aspect, the balance between the left and right heat amounts can be further improved, and the occurrence of uneven heating can be further prevented.

According to the heating cooker of the present invention, since the respective heaters are controlled independently, it becomes easier to balance the heat quantity, and it is possible to further prevent the occurrence of uneven heating. According to the heating cooker of claim 8, the plurality of heaters are configured to be controlled simultaneously,
The circuit configuration can be simplified. In addition, since the configuration is such that each fan drive motor is controlled independently, it is easier to balance the amount of heat as in the seventh aspect.

According to the heating cooker of the ninth aspect, the circuit configuration can be simplified by controlling the plurality of fans simultaneously. Further, by adopting a configuration in which each heater is controlled independently, it is easier to balance the amount of heat as in the seventh and eighth aspects.

According to the tenth aspect of the present invention, a large number of cooking can be performed at a time by cooking using the square plate in two upper and lower stages. According to the heating cooker of the eleventh aspect, even when the square dishes are set up and down in two stages, the heated objects of the upper and lower square dishes can be cooked as good as possible by the hot air and the upper heater. become able to.

According to the heating cooker of the twelfth aspect, the object to be heated in the upper square dish approaches the upper heater, and the heating efficiency of the upper heater is improved. In addition, by securing a large interval between the upper square plate and the lower square plate, the object to be heated of the lower square plate can be more favorably heated by hot air discharged from the discharge port.

According to the thirteenth aspect of the present invention, it is possible to control the flow of hot air in the heating chamber by making the number of revolutions of the fan drive motor variable. According to the heating cooker of claim 14, since the wind direction is determined by the wind pressures of the left and right fans, the wind direction of the hot air in the heating chamber can be set relatively easily.

According to the fifteenth aspect of the present invention, it is possible to control the flow of hot air in the heating chamber, so that the temperature distribution and the amount of hot air in the heating chamber can be adjusted to those suitable for the heating chamber. It becomes possible to set, and it is possible to further prevent the occurrence of uneven heating.

According to the heating cooker of the sixteenth aspect, it is possible to prevent the winds from the left and right fans from being mixed before being supplied to the heating chamber as much as possible. To discharge into the heating chamber, and thus efficient cooking can be performed. Also in the heating cooker of claim 17,
The hot air from each fan can be independently discharged into the heating chamber.

According to the heating cooker of the eighteenth aspect, by rotating the right and left fans alternately, uneven heating can be prevented as much as possible. In addition, there is an advantage that only the ventilation port is required as the opening corresponding to the left and right fans, and it is not necessary to separately form the suction port and the discharge port. According to the heating cooker of the nineteenth aspect, it is possible to adjust a subtle burning degree by making the rotation speeds of the left and right fans different.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a broken front view in a state where a door is opened.

FIG. 2 is a front view of a hot air supply device.

FIG. 3 is a vertical side view of the hot air supply device.

FIG. 4 is an electrical configuration diagram

FIG. 5 is a view corresponding to FIG. 2, showing a second embodiment of the present invention;

FIG. 6 is a diagram corresponding to FIG. 3;

FIG. 7 is a view corresponding to FIG. 2, showing a third embodiment of the present invention;

FIG. 8 is an electrical configuration diagram of a main part.

FIG. 9 is a view corresponding to FIG. 8, showing a fourth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 8, showing a fifth embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 1, showing a sixth embodiment of the present invention.

FIG. 12 shows a seventh embodiment of the present invention, and is a front view with a door opened.

FIG. 13 is a longitudinal side view at the time of heating cooking.

FIG. 14 is a view corresponding to FIG. 8, showing an eighth embodiment of the present invention;

FIG. 15 is a diagram corresponding to FIG. 12;

FIG. 16 is a view corresponding to FIG. 2, showing a ninth embodiment of the present invention;

FIG. 17 is a diagram corresponding to FIG. 3;

FIG. 18 is a view corresponding to FIG. 2, showing a tenth embodiment of the present invention.

FIG. 19 is a view corresponding to FIG. 12, showing an eleventh embodiment of the present invention;

FIG. 20 is a diagram corresponding to FIG. 1 showing a conventional example.

FIG. 21 is a partially enlarged perspective view of a fan.

[Explanation of symbols]

11 is a main body, 12 is a heating chamber, 15 is a square plate support, 16 is a hot air supply device, 17 is a casing, 18a and 18b are fans, 19 is a heater, 19a is a terminal, 20 is a fan driving motor, and 22 is suction. Port 23, a discharge port, 44 a control circuit, 48 a heater, 48a a terminal, 49 a heater, 49
a is a terminal, 50 is a heater, 50a is a terminal, 55 is a square plate,
56 is an upper heater, 57 is an object to be heated, 60 and 61 are triacs, 63 is a partition plate, 64a and 64b are air guide plates, 6
Reference numerals 6a and 66b denote ventilation holes.

Claims (19)

[Claims] A heater, a fan for supplying heat generated by the heater as hot air into the heating chamber, and a fan driving motor for rotating the fan are provided at a rear side of a heating chamber for accommodating an object to be heated. A heating cooker comprising: a hot-air supply device having a plurality of fans; 2. The cooking device according to claim 1, wherein a heater, a plurality of fans, and a fan driving motor of the hot air supply device are unitized. 3. The cooking device according to claim 1, wherein the heater is constituted by one heater provided so as to surround the plurality of fans. 4. A heater having two fans, which are arranged side by side, and wherein the heater has a symmetrical shape such that a terminal of the heater is located between the two fans. The cooking device according to claim 3, wherein 5. The heating cooker according to claim 1, wherein a plurality of heaters are provided for each fan so as to surround each fan independently. 6. Two fans are arranged side by side on the left and right, and the two heaters corresponding to the fans are arranged to have substantially the same shape and to be bilaterally symmetric. The cooking device according to claim 5. 7. The cooking device according to claim 5, wherein each of the plurality of heaters is independently controlled. 8. A plurality of fan driving motors are provided corresponding to each fan, a plurality of heaters are controlled simultaneously, and the plurality of fan driving motors are controlled independently. The heating cooker according to claim 5, wherein the cooking device has a configuration. 9. A plurality of fan drive motors are provided for each fan, and the plurality of fan drive motors are controlled simultaneously, and the plurality of heaters are controlled independently. The heating cooker according to claim 5, wherein the cooking device has a configuration. 10. The heating chamber is provided with a square plate support in two upper and lower stages.
2. The cooking device according to claim 1, wherein the cooking device can be stored in a stage. 11. An upper heater is provided on a ceiling portion of a heating chamber, and a discharge port of hot air into the heating chamber is set to be located between upper and lower square plates, and a heated object placed on an upper square plate is provided. The object is mainly heated by the heat of the upper heater, and the object to be heated placed on the lower square dish is mainly heated by the heat of the hot air discharged from the discharge port. The cooking device according to claim 10, wherein 12. The distance between the upper square plate and the lower square plate is set to be larger than the distance between the upper square plate and the upper heater. Item 11
The heating cooker as described. 13. The cooking device according to claim 1, wherein the fan drive motor has a variable number of revolutions. 14. The cooking device according to claim 1, wherein the two fans are arranged side by side on the left and right, and the rotation directions of the left and right fans are opposite to each other. 15. A fan driving motor is provided for each of the two fans. The rotation direction of the left fan is set clockwise, and the rotation direction of the right fan is counterclockwise. 15. The cooking device according to claim 14, wherein the motors for driving the right and left fans are set in the directions, and the rotation speeds of the left and right fan driving motors can be independently controlled. 16. The cooking device according to claim 1, wherein two fans are arranged side by side on the left and right, and a partition plate is provided between the left and right fans. 17. A fan comprising two fans, which are arranged side by side on the right and left, and a wind guide plate for receiving wind of a corresponding fan and guiding the fan into a heating chamber is provided in the vicinity of a discharge port of each fan. The cooking device according to claim 1, wherein 18. Two fans are arranged side by side on the left and right, and these left and right fans are rotated alternately. When one of the fans is rotated, hot air generated by the fan is generated. 2. The cooking device according to claim 1, wherein the heating chamber is configured to be supplied into the heating chamber from the ventilation port on the other fan side. 19. The cooking device according to claim 18, wherein the rotation speeds of the left and right fans are made different.