JPH05340542A - Heating cooker - Google Patents

Abstract

PURPOSE:To improve the appearance of a cooker with a hot air supply device and reduce the lengthwise dimension of the cooker and its installation space. CONSTITUTION:A heater 25 and a fan device 26 are provided on each of the upper and lower parts on the rear part of a heating chamber 12. The structure of a hot air supply device 27 is composed of the heaters 25 and the fan devices 26. Cross flow fans 30 are used in the fan devices 26. Since the cross flow fan 30 is extended laterally and since its motor is carried at the end of the cross flow fan 30, the motor part is not projected largely rearward of the cooker as in a conventional case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker provided with a hot air supply device for supplying hot air into the back of a heating chamber.

[0002]

2. Description of the Related Art For example, in a microwave oven with an oven function, as shown in FIGS. 5 and 6, a heater 3, a centrifugal fan 4a, and a centrifugal fan 4a are provided on the back of a heating chamber 2 in a main body 1 as a rotary shaft. There is a configuration in which a hot air supply device 5 having a fan device 4 composed of a motor 4c which is rotationally driven via 4b is provided. In this case, the heater 2 and the centrifugal fan 4a are arranged inside the casing 6, and the motor 4c is arranged behind the casing 6. The motor 4c
A motor cooling fan 4d is also provided on the rotating shaft 4b.

In this apparatus, the hot air supply device 5 is operated to suck the air in the heating chamber 2 into the casing 6 through the central suction port 2a to heat the air, and the heated air is provided above and below. By supplying hot air into the heating chamber 2 from the discharge port 2b, the hot air is circulated as indicated by the arrow, and the hot air cooks the food to be cooked contained in the heating chamber 2. ..

[0004]

However, in the above-described conventional structure, the motor 4c of the fan unit 4 is located behind the casing 6, and therefore, as shown in FIG. The convex portion 7 corresponding to the motor 4c
Is required. Therefore, not only does the convex portion 7 deteriorate the appearance, but the front-back dimension of the main body 1 becomes large,
Consequently, there is a problem that the installation space of the main body 1 becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heating cooker capable of improving the appearance, suppressing the size of the main body in the front-rear direction, and reducing the installation space.

[0006]

In order to achieve the above object, the present invention provides a heat source at the back of the heating chamber and a fan device for supplying the air heated by the heat source as hot air into the heating chamber. A cross flow fan disposed along the back surface of the heating chamber, and an impeller of the cross flow fan provided at an end of the cross flow fan. It is characterized in that it is constituted by a motor for rotationally driving.

At this time, it is preferable that the fan device is arranged at the upper part and the lower part of the back of the heating chamber.

[0008]

Since the cross flow fan used in the fan device is horizontally long and the motor is provided at the end of the cross flow fan, it is possible to prevent the motor portion from protruding largely backward as in the conventional case.

In addition, when the fan devices using the cross flow fan are arranged in the upper and lower parts of the back of the heating chamber, both fan devices are operated at the same time, and only one of the upper and lower fan devices is operated. It is possible to selectively use when driving and for cooking, for example.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a microwave oven will be described below with reference to FIGS. First, in FIG. 3 showing the appearance of the microwave oven, a heating chamber 12 is provided inside a main body 11 which is a cooker main body, and a door 13 for opening and closing a front opening of the heating chamber 12 is rotatable at a front portion. In addition to being provided, the operation panel 14 is provided on the right side.

A machine room 15 is provided behind the operation panel 14 as shown in FIG. 2. In the machine room 15, a magnetron 16, an inverter unit 17 for driving the magnetron 16, and a circuit board 18 are provided. An air blower 19 for cooling the magnetron is provided. The blower device 19 is composed of an axial fan 20 and a motor 21 that rotationally drives the fan.

On the left and right side surfaces of the heating chamber 12, top plate receivers 22 are provided vertically in two steps. Further, as shown in FIG. 1, the rear plate 12a of the heating chamber 12 is provided with an intake port 23 having a large number of small holes in the central portion, and a discharge port having a large number of small holes at the upper and lower portions. An outlet 24 is formed. In this case, both the suction port 23 and the discharge port 24 are formed in a rectangular shape that is long in the lateral direction as a whole.

A heater 25 as a heat source and a fan device 26 are provided on the upper and lower portions of the back of the heating chamber 12.
And a pair of and are arranged horizontally along the rear plate 12a. Here, the hot air supply device 2 that supplies hot air into the heating chamber 11 by the heaters 25 and the fan device 26.
Make up 7.

Of the hot air supply device 27, each fan device 2
Reference numeral 6 denotes a cross flow fan 30 including a horizontally long impeller 28 and a fan casing 29 surrounding the impeller 28, and the impeller 28 of the cross flow fan 30 is rotatably driven at the end portion of the cross flow fan 30. It is composed of a motor 31. Further, each motor 31 is arranged in the machine room 15 as shown in FIG. In this case, the upper heater 25 and the fan device 26, and the lower heater 2
5 and the fan device 26 are configured to be switched between a case where they are operated simultaneously and a case where only one side is operated.

The heaters 25 and the cross flow fan 30 are covered by a casing 32, and the motor 31 is located outside the casing 32. In addition, the casing 32
A heat insulating material 33 and a heat insulating material pressing member 34 are provided on the back surface of the main body 11 and are covered with a rear plate 35 of the main body 11.

On the upper surface side of the ceiling plate of the heating chamber 12,
A grill heater 36 is provided as shown in FIG. 1, and a vent 37 is formed in the right side plate 12b of the heating chamber 12 as shown in FIG. 3, and the vent 37 is rotatable. The shutter 38 opens and closes.

In the above structure, when performing normal oven cooking, the heater 25 and the fan device 26 on both upper and lower sides of the hot air supply device 27 are simultaneously operated. Among these, as shown by the arrow in FIG. 1, the air in the heating chamber 12 is sucked into the casing 32 from the central suction port 23 by the blowing action of the fan device 26 on the upper side, and at the same time, the upper discharge port is discharged. The air discharged from 24 into the heating chamber 12 is heated by the heater 25 so that hot air is supplied into the heating chamber 12.

Further, due to the air blowing action of the lower fan unit 26, the air in the heating chamber 12 flows from the central suction port 23 to the casing 3 as shown by the arrow in FIG.
2 is discharged into the heating chamber 12 through the lower discharge port 24, and the air discharged at this time is discharged into the heater 2
By being heated by 5, hot air is supplied into the heating chamber 12.

Thus, the hot air supplied into the heating chamber 12 in this manner can heat and cook an object to be cooked (not shown) housed in the heating chamber 12.

At this time, the air blower 19 in the machine room 15 is operated to generate a wind in the machine room 15 as shown by an arrow in FIG. The motor 31 can be cooled. In this case, the ventilation port 37 in the heating chamber 12 is closed by the shutter 38.

On the other hand, as shown in FIG. 4, the top plate 40 on which the object to be cooked 39 is placed is set on the top plate receiver 25, and the heater 25 and the fan device 26 on the lower side of the hot air supply device 27 are set. Along with the operation, the grill heater 36 is operated.

Then, by the heater 25 and the fan device 26 on the lower side, as shown by the solid line arrow in FIG.
Hot air is circulated on the lower side of the
9 is heated, and the food 39 to be cooked is also heated by the radiant heat of the grill heater 36 (shown by a dotted arrow in FIG. 4).

Such a cooking method uses the grill heater 3
The surface of the food 39 to be cooked can be satisfactorily heated by the radiant heat of 6 and the heat transfer to the inside of the food 39 to be satisfactorily carried out by the heat of the hot air, so that the inside can be satisfactorily heated. As a result, it is suitable for pizza cooking where the inside is soft, and fish dishes where the inside is cooked and the surface is appropriately browned.

According to such an embodiment, the hot air supply device 27
The cross flow fan 30 is used for the fan device 26 in FIG. 1, and the cross flow fan 30 is horizontally long, and the motor 31 is provided at the end of the cross flow fan 30. There is no large protrusion to the rear, so that the appearance can be improved, the size of the main body 11 in the front-rear direction can be suppressed, and the installation space can be reduced.

In this case, since the motor 31 of the cross flow fan 30 is arranged in the machine room 15, it becomes possible to cool the motor 31 by the blower device 19 on the machine room 15 side, and the temperature of the motor 31 can be reduced. The rise can be suppressed more reliably.

Further, since the heater 25 and the fan devices 26 using the cross-flow fan 30 are arranged at the upper and lower portions of the back of the heating chamber 12, respectively, both the upper and lower heaters 2 are provided.
5 and the fan device 26 are operated simultaneously, and one of the upper and lower heaters 25 and the fan device 2
It is possible to selectively use the case where only 6 is driven.

Furthermore, by combining with the grill heater 36, a new cooking method which has not been possible in the past can be realized.

[0028]

According to the heating cooker of the first aspect,
By using a cross flow fan for the fan device in the hot air supply device, there is no large protruding part at the rear part of the main body, it is possible to improve the appearance and it is possible to suppress the size of the main body in the front-back direction and install it. It has an excellent effect that the space can be reduced.

Further, according to the heating cooker of the second aspect, when the fan devices using the cross flow fan are arranged at the upper and lower portions of the back of the heating chamber, both fan devices are operated at the same time. And when only one of the upper and lower fan devices is operated can be selectively used depending on, for example, the dish.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a machine room portion.

FIG. 3 is a perspective view with a door opened.

FIG. 4 is a view corresponding to FIG. 1 for explaining an action different from FIG.

FIG. 5 is a diagram corresponding to FIG. 3 showing a conventional configuration.

FIG. 6 is a view corresponding to FIG.

FIG. 7 is a perspective view from the rear.

[Explanation of symbols]

11 is a main body, 12 is a heating chamber, 15 is a machine room, 25 is a heater (heat source), 26 is a fan device, 27 is a hot air supply device,
28 is an impeller, 30 is a cross flow fan, 31 is a motor, and 36 is a grill heater.

Claims (2)

[Claims] 1. A hot air supply device having a heat source and a fan device for supplying the air heated by the heat source as hot air into the heating chamber at the back of the heating chamber,
The fan device is composed of a cross flow fan arranged along the back surface of the heating chamber, and a motor provided at an end of the cross flow fan for rotationally driving an impeller of the cross flow fan. Cooker characterized by. 2. The heating cooker according to claim 1, wherein the fan device is arranged at an upper portion and a lower portion of a back portion of the heating chamber.