JPH08270951A - Microwave oven with oven function - Google Patents

Abstract

PURPOSE: To improve cooking quality of oven cooking and to improve the efficiency of oven cooking. CONSTITUTION: An over chamber 12 to contain a substance to be cooked is arranged at a body 11. An excitation port 21 to feed microwaves from a magnetron is formed in the right side wall part of the oven chamber 12. A hot blast generating device for oven cooking comprising a fan and a heater is arranged on the back side of the back wall part 12a of the oven chamber 12. An opening 12b is formed in the back wall part 12a, a fixing plate 32 is secured to the back of the opening, and upper and lower opening parts 28 and 29 through which hot blast is fed are formed. A vertically slidable moving plate and an opening closing mechanism, comprising a motor to move the moving plate is arranged at the back part of the fixing plate 32. A control part is provided to vary the opening areas of the upper and lower opening parts 28 and 29 by vertically moving the moving plate according to the shape of a substance to be cooked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven with an oven function capable of performing a range cooking mode in which a cooking product is heated by microwaves and an oven cooking mode in which a cooking product is heated by hot air.

[0002]

2. Description of the Related Art As shown in FIG. 8, a microwave oven of this type is constructed by arranging a hot air generating device 3 on the outside of a back wall portion of an oven cabinet 2 arranged in an outer box 1. ing. The hot air generator 3 includes a heater 5 and a centrifugal fan 6 inside a casing 4, and a motor 7 that drives the centrifugal fan 6 outside the casing 4.
Further, hot air supply ports 8 and 8 are formed in the upper and lower portions of the back wall of the oven chamber 2, and an air intake port 9 is formed in the middle thereof.

As a result, when the oven cooking mode is executed, the heater 5 and the motor 7 are energized, and accordingly, the air in the casing 4 is heated by the heater 5 to become hot air, and this hot air is supplied to the supply port 8, 8 to Oven 2
After being contributed to the heating of the food (not shown) which is supplied to the inside and is supported on the rectangular oven tray 10, the circulation is performed such that it returns from the intake port 9 into the casing 4. Also, at this time, the oven plate 10 is the oven cabinet 2
It is arranged so that it is vertically arranged in two stages. Although not shown, this microwave oven is also capable of executing a range cooking mode in which microwaves are supplied into the oven chamber 2 by driving a magnetron provided in the machine room.

[0004]

By the way, in the case of performing oven cooking, as a supporting form of the food, in addition to the above-mentioned form in which the oven plates 10 are arranged in two stages,
For example, the oven plate 10 may be arranged only in the upper stage, only in the lower stage, or the like. However, in the above-mentioned conventional ones, in any of the supporting modes, cooking is performed in the same heating mode in which hot air is supplied into the oven chamber 2 from the fixed supply ports 8 and 8, so that it is not always supported. In some cases, the optimum heating mode depending on the form may not be achieved, and there is room for improvement in terms of heating efficiency and the completion of cooking.

The above-mentioned conventional hot air supply ports 8 and 8 are provided.
The intake port 9 is formed of a large number of small holes (punching holes) so as to prevent radio wave leakage, and has no effect on the range cooking, either good or bad.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an oven function capable of improving the cooking quality of oven cooking and also improving the efficiency of range cooking. To provide a microwave.

[0007]

According to a first aspect of the present invention, there is provided a microwave oven with an oven function, an oven cabinet in which food is stored, and a microwave oven for supplying microwaves to the oven cabinet. A hot air generating device for oven cooking, which is provided with a heater and a fan inside a casing provided outside the one side wall of the oven chamber, and the hot air provided above and below the one side wall of the oven chamber. It is characterized by a configuration including an opening for supplying hot air from the generator into the oven and an opening / closing mechanism for changing the opening area of these openings. In this case, control means for controlling the opening / closing mechanism can be provided based on whether the cooking mode to be executed is range cooking or oven cooking (the invention of claim 2).

Further, a shape sensor is provided for detecting the shape of the cooked food contained in the oven, and when the shape detected by the shape sensor is vertically long when the oven cooking mode is executed, the upper side and the lower side are detected. When the opening areas of the openings are substantially equal to each other and are planar, a control means for controlling the opening / closing mechanism can be provided so that the opening area of the lower opening is larger than that of the upper opening (claim 3). Invention).

In an oven in which oven plates supporting food to be cooked can be arranged in upper and lower two stages, when the oven cooking mode is executed, the oven plates are arranged only in the upper stage. The opening area of the upper side opening is larger than that of the lower side, and the opening area of the lower side opening is larger than that of the upper side when the oven dish is arranged only in the lower stage. It is possible to provide a control means for controlling the above (invention of claim 4).

A baking color sensor for detecting the baking color of the food contained in the oven is provided, and when the baking color sensor detects a predetermined baking color during execution of the oven cooking mode, the lower side It is also possible to provide control means for controlling the opening / closing mechanism so that the opening area of the opening is larger than that on the upper side (the invention of claim 5).

A weight sensor for detecting the weight of the food item stored in the oven is provided, and when the weight detected by the weight sensor is larger than a predetermined weight when the range cooking mode is executed, the opening portion on the upper side is opened. It is also possible to provide control means for controlling the opening / closing mechanism such that the opening area is made larger than the lower side and the opening area of the lower side opening is made larger than the upper side when the weight is not more than a predetermined weight (claim 6). invention).

Further, a gas sensor for detecting the concentration of gas released from the food stored in the oven is provided, and the upper side until the detected concentration of the gas sensor reaches a predetermined value when the range cooking mode is executed. And a control means for controlling the opening / closing mechanism so that the opening areas of the lower openings are made equal and, after reaching a predetermined value or more, the opening areas of the lower openings are made larger than those of the upper opening. May be provided (the invention of claim 7).

Furthermore, in the initial stage of the cooking execution,
It is also possible to provide control means for controlling the opening / closing mechanism so that the opening areas of the upper side opening and the lower side opening are made equal, and the opening area of the lower side opening becomes larger than the upper side as the cooking progresses. (Invention of Claim 8).

[0014]

According to the microwave oven with an oven function of claim 1 of the present invention, when the range cooking mode is executed, the microwave from the magnetron is supplied to the inside of the oven to heat the food and the oven cooking mode is executed. Occasionally, the hot air generated by the hot air generating device is supplied to the inside of the oven through the openings on the upper side and the lower side of one side wall of the oven to heat the food. At this time, since the opening / closing mechanism that changes the opening area of the opening for hot air supply is provided, the balance of the hot air from above and below can be adjusted by the balance of the opening areas of the upper and lower openings when executing the oven cooking mode. In addition, when the range cooking mode is executed, the distribution mode of radio waves and thus the oven impedance can be adjusted by the opening area of the opening.

In this case, if control means for controlling the opening / closing mechanism is provided based on whether the cooking mode to be executed is range cooking or oven cooking (microwave oven with oven function of claim 2), for example, when the range cooking mode is executed. The opening form can be changed according to the cooking mode by closing the opening to prevent radio wave leakage and opening the opening when the oven cooking mode is executed.

By the way, in the case of executing the oven cooking mode, when the shape of the food to be cooked is a vertically long shape with a large height, it is desirable to supply hot air from the upper side and the lower side of the oven cabinet. If the shape of the object is a flat shape with a small height, it is desirable to increase the opening on the lower side to increase the amount of hot air supplied to the lower side of the oven. Therefore, according to the microwave oven with an oven function of the third aspect, the shape sensor for detecting the shape of the cooked food and the control means for controlling the opening / closing mechanism based on the detection are provided. Oven cooking can be performed with appropriate heating.

Further, in the case where the oven dishes can be arranged in upper and lower two stages when the oven cooking mode is executed, when the oven dishes are arranged only in the upper stage,
It is desirable to increase the opening on the upper side to increase the amount of hot air supplied to the upper side of the oven chamber.If the oven pan is only located in the lower stage, increase the opening on the lower side to increase the oven. It is desirable to increase the amount of hot air supplied to the lower side of the cabinet. Therefore, according to the microwave oven with an oven function of claim 4, since the control means for controlling the opening / closing mechanism is provided in accordance with the arrangement of the oven plate, the arrangement of the oven plate, and hence the supporting position of the cooked food in the oven chamber, is determined. Oven cooking can be performed in a suitable heating manner.

Further, in the oven cooking mode, it is required that the surface of the cooked product is appropriately browned and the inside of the cooked product is sufficiently heated. The hot air supply from the opening on the upper side is effective for adding a brown color to the food, while the supply of hot air from the opening on the lower side is not effective for darkening the baking color, It is effective for sufficiently heating the inside of the. According to the microwave oven with an oven function of claim 5, since the control means for controlling the opening / closing mechanism based on the detection of the baking color sensor is provided, it is possible to sufficiently heat the food while ensuring an appropriate baking color. Oven cooking can be performed in a possible heating mode.

On the other hand, when the range cooking mode is executed, by changing the opening area of the opening, it is possible to change the mode of the microwave intensity distribution in the oven, and thus the so-called oven impedance. In this case, according to the experiments and studies by the present inventor, in the case of a relatively large cooked food, it is better to make the opening area of the opening on the upper side larger than that on the lower side. If a good microwave intensity distribution can be obtained and the food to be cooked is relatively small, the heating efficiency will be better if the opening area on the lower side is larger than that on the upper side. Was observed. Therefore, according to the microwave oven with an oven function of claim 6, since the weight sensor for detecting the weight of the cooked food and the control means for controlling the opening / closing mechanism based on the detection are provided, the inside of the oven chamber is covered with the cooked food. The range cooking can be performed in a state where the oven impedance is appropriate according to the weight and the size.

Further, according to further experiments and studies by the present inventor, it is possible to improve the heating efficiency by changing the oven impedance in accordance with the progress of heating cooking when the range cooking mode is executed. It was recognized that That is, at the beginning of cooking,
The heating efficiency is improved by making the opening areas of the upper side and the lower side equal and making the opening area of the lower side opening larger than the upper side after the cooking has progressed to some extent. Moreover, the progress of cooking can be known based on the detection of the gas sensor. Therefore, according to the microwave oven with an oven function of claim 7, since the gas sensor for detecting the gas concentration and the control means for controlling the opening / closing mechanism based on the detection are provided, the oven suitable for the progress of cooking is provided. Impedance is obtained, and efficient range cooking can be performed.

Furthermore, the baking color of the cooking product during execution of the oven cooking mode and the gas concentration during execution of the range cooking mode are associated with the elapse of cooking time. Instead of the detection, the same action and effect can be obtained by changing the opening areas of the upper and lower openings based on the passage of time. Therefore, according to the microwave oven with the oven function of the eighth aspect, it is possible to perform the oven cooking capable of sufficiently heating the food while ensuring an appropriate browning color, and the efficient microwave oven cooking. Can be executed.

[0022]

EXAMPLES Some examples of the present invention will be described below.
Description will be made with reference to FIGS. 1 to 7. (1) First Embodiment First, a first embodiment of the present invention (corresponding to claims 1 and 3) will be described with reference to FIGS. 1 to 6.

FIG. 1 shows the overall appearance of a microwave oven with an oven function according to this embodiment. Here, in the main body 11 of the microwave oven, an oven cabinet 12 having a rectangular box shape with an open front surface is arranged. Further, a door 13 for closing the front of the oven chamber 12 is provided on the front surface of the main body 11 so as to be openable and closable, and further various kinds of user's instructions for selecting a cooking mode, instructing to start cooking, and the like are provided. An operation panel 14 having operation keys and a display section for performing necessary display is provided.

A rotary net 15 is provided on the inner bottom of the oven chamber 12. A rotary plate (round plate) (not shown) that supports the food is placed on the rotary net 15 when the range cooking mode is executed. Although not shown in detail, the rotary net 15 is connected to a motor through a shaft that penetrates the bottom of the oven chamber 12 and is rotated by driving the motor. Furthermore, a weight sensor 16 (shown only in FIG. 5) is connected to the shaft, and the weight sensor 16 detects the weight of the food item placed on the rotary net 15 (rotary plate). It has become so.

Further, on the left and right inner side wall portions of the oven chamber 12, support portions 18 for supporting the oven plate 17 (square plate) shown in FIG. 2 when the oven cooking mode is executed are provided in upper and lower two stages. Has been. As a result, the oven trays 17 that support the food when the range cooking mode is executed can be arranged in the upper and lower two stages in the oven cabinet 12. When the food to be cooked is relatively large (high) or the amount of food to be cooked is small, it is possible to place the oven plate 17 on either the upper stage or the lower stage to perform oven cooking. Of course. Furthermore, it is also possible to perform oven cooking using the above-mentioned rotating dish.

The oven chamber 12 is provided with a shape sensor 19 (see FIG. 5) for detecting the shape of the food. In this case, the shape sensor 19 is composed of a plurality of sets (only one set is shown in FIG. 1) of transmissive optical sensors 20 arranged on the left and right inner wall portions of the oven chamber 12, and The height of the cooked food is detected depending on the presence or absence of the food. At this time, part of the optical sensor 20 also functions as a sensor for detecting the presence or absence of the oven dish 17.

Further, an excitation port 21 is provided on the right side wall of the oven cabinet 12. Although not shown, a machine room is provided on the rear side of the operation panel 14, and microwaves from the magnetron arranged in the machine room are guided from the excitation port 21 to the oven chamber through a waveguide. It is supplied to the inside of 12 and the range cooking is performed accordingly. Although not shown, an exhaust port is provided on the left side wall of the oven chamber 12, and a gas sensor 22 (only shown in FIG. 5) for detecting the gas concentration in the oven chamber 12 is provided in the exhaust port. It is provided.

As shown in FIG. 2, a hot air generator 23 for oven cooking is provided outside the back wall 12a, which is one side wall of the oven cabinet 12, as shown in FIG. In this hot air generating device 23, a centrifugal fan 25 is provided in a circular container-shaped casing 24 provided so as to cover the back surface of the back wall portion 12a, and the periphery of the centrifugal fan 25 is surrounded. A heater 26 such as a sheathed heater is disposed at a position. Further, the centrifugal fan 25 is adapted to be rotated by a fan motor 27 arranged outside the casing 24. By this rotation, air is sucked from the center side and blown to the outer peripheral side. Has become.

At this time, the back wall portion 12a is located on the upper side and the lower side, as described below, for supplying the hot air from the hot air generator 23 into the oven chamber 12. An upper opening 28 and a lower opening 29 are provided. In addition, at the central portion of the back wall portion 12a, a suction port 3 for sucking air from the oven chamber 12 is provided.
0 is formed. As a result, when the hot air generator 23 (centrifugal fan 25 and heater 26) is driven, the air in the oven chamber 12 is sucked through the suction port 30 and the heater 2
6 is heated to become hot air, and the air is circulated from the upper opening 28 and the lower opening 29 into the oven chamber 12, whereby the oven cooking is performed.

In this embodiment, the upper opening 2
8 and opening / closing mechanism 3 for changing the opening area of the lower opening 29
1 is provided. Hereinafter, the upper and lower openings 2
8, 29 and the opening / closing mechanism 31 will be described with reference to FIGS. 3 and 4. That is, in the back wall portion 12a, as shown in FIGS. 1 and 3, etc., an opening 12b having a shape in which upper and lower side portions of a vertically long rectangle are curved in a convex shape is formed.
As shown in FIG. 4, the back surface of the back wall 12a is provided with a fixing plate 32 having a shape having protrusions on the left and right of a substantially circular portion. It is fixed.

At this time, the opening 12b of the back wall portion 12a
The portions other than the upper and lower end portions of the back wall portion are closed by the fixing plate 32, and as a result, an arc-shaped upper opening portion 28 is formed on the upper side of the back wall portion 12a, and a circular shape is formed on the lower side of the back wall portion 12a. The lower opening 29 having an arc shape is formed. The upper opening 28 and the lower opening 29 are sized to allow the microwaves to pass therethrough. Further, a large number of punching holes are formed in the central portion of the fixed plate 32, so that the suction port 30 is configured.

Further, as shown in FIGS. 3 and 4, a movable plate 33 is provided so as to be slidable in the vertical direction so as to be directed to the rear surface of the fixed plate 32. The movable plate 33 is in the form of a rectangular plate having a width dimension equal to or larger than the width dimensions of the upper and lower openings 28 and 29, and the plate surface has a large number of punching holes over the entire surface. Is formed so that the suction port 30 is secured.

On one side (the left side in FIG. 3) of the movable plate 33, a rack portion 33a is integrally provided so as to extend in the vertical direction so as to rise to the back side. In addition, in the protruding portion on the left side of FIG. 3 of the fixing plate 32,
A motor 34 is attached and the shaft 3 of this motor 34
The pinion 35 attached to the rack 4a
meshes with a. Thus, the opening / closing mechanism 31 is configured, and the movable plate 33 moves up and down with respect to the fixed plate 32 by the driving of the motor 34, whereby the upper opening 28 and the lower opening 29 are opened and closed, and the opening area thereof is reduced. It is supposed to be changed.

Further, as shown in FIG. 5, the motor 34 is adapted to be energized and controlled by a control unit 36 as a control means. The control unit 36 is configured to include a microcomputer and receives signals from the shape sensor 19, the weight sensor 16, and the gas sensor 22. As will be described later in the description of the operation, in this embodiment, the control unit 36 has a software configuration, and the shape of the food detected by the shape sensor 19 is vertically long when the oven cooking mode is executed. Occasionally, the opening areas of the upper opening 28 and the lower opening 29 are made substantially equal, and when the shape of the cooked food is flat, the movable plate is arranged so that the opening area of the lower opening 29 is larger than that of the upper opening 28. 33 is controlled.

Next, the operation of the above configuration will be described with reference to FIG. When performing oven cooking using a rotary plate (round plate), the user places the food on the rotary plate and sets the rotary plate in the oven chamber 12 (on the rotary net 15). Then, the operation panel 14 is operated to select the oven cooking mode, the cooking time is set, and then the start key is turned on. Then, the hot air generator 23
The (centrifugal fan 25 and the heater 26) are driven to supply hot air into the oven chamber 12.

Here, the foods related to the oven cooking include
There are flat ones such as cookies and relatively long ones such as roast chicken. At this time, in order to improve the quality of cooking, if the shape of the food to be cooked is vertically long with a large height, hot air may be supplied from the upper side and the lower side of the oven cabinet 12. Desirably, when the shape of the cooked food is a flat shape with a small height, it is desirable to increase the amount of hot air supplied to the lower side of the oven chamber 12.

Therefore, in this embodiment, the control unit 36 controls the energization of the motor 34 according to the flow chart of FIG.
The position of the movable plate 33 and thus the opening areas of the upper opening 28 and the lower opening 29 are controlled.
That is, when the start key is turned on, step S1
At step S2, the shape sensor 19 (a plurality of optical sensors 20) is operated to take in the shape data of the food.
At, it is determined whether the shape of the cooked product is flat or vertically long.

When it is determined that the shape of the cooked food is flat, in the next step S3, the movable plate 33 is raised to the uppermost position to block the entire upper opening 28, as shown in FIG. As a result, the cooking is carried out in such a manner that hot air is supplied only from the lower opening 29. In the schematic diagram in the flow chart, the opening portion is shown by hatching.

On the other hand, when it is determined that the shape of the food to be cooked is vertically long, in the next step S4, the movable plate 33 is positioned at the central portion (see FIG. 3) where it wraps with the fixed plate 32, and the upper opening is formed. Both the portion 28 and the lower opening portion 29 are fully opened, and the heating cooking is performed in such a manner that hot air is supplied from the upper side and the lower side of the oven cabinet 12.

Therefore, according to the present embodiment, when the oven cooking mode is executed, the shape sensor 19 is different from the conventional one in which hot air is supplied from the fixed supply ports 8, 8 into the oven chamber 2. The opening areas of the upper opening portion 28 and the lower opening portion 29 can be changed according to the shape of the cooked food detected by, and the oven cooking can be performed in an appropriate heating mode. As a result, the cooking quality of oven cooking can be improved.

(2) Second Embodiment The flowchart of FIG. 7 shows a second embodiment (corresponding to claim 4) of the present invention. This embodiment is based on the first
The third embodiment is different from the first embodiment in the software configuration of the control unit 36, and therefore, the structure of the microwave oven and the like are the same as those in the first embodiment. Therefore, new illustration and detailed description will be omitted.

In the present embodiment, the control unit 36 is in the execution of the oven cooking mode, and the plurality of sets of optical sensors 2 are used.
0 (shape sensor 19) detects the position of the oven plate 17 set in the oven chamber 12 (only the upper stage, only the lower stage, and upper and lower stages), that is, the position of the oven dish 17, that is, the support of the cooked food. The opening areas of the upper opening 28 and the lower opening 29 are changed according to the position.

Here, as described above, the oven plates (square plates) 17 can be arranged in the upper and lower two stages in the oven chamber 12, and when the amount of food to be cooked is large, the upper and lower two stages. The oven dish 17 can be arranged to perform oven cooking, and when the food to be cooked is relatively large (high) or the amount of the food to be cooked is small, the oven dish can be placed on either the upper or lower stage. 17 can be arranged and oven cooking can be performed.

At this time, when the oven plate 17 is arranged only in the upper stage, it is desirable to increase the supply amount of hot air in the upper part of the oven chamber 12, and the oven dish 17 is arranged only in the lower stage. If so, it is desirable to increase the amount of hot air supplied to the lower side of the oven chamber 12. Also, the oven plate 17 is 2
There is a circumstance where it is desirable to supply hot air from both the upper and lower sides when they are arranged in rows.

In the present embodiment, when the oven cooking mode is started, first, in step S11, a plurality of sets of optical sensors 20 are operated to obtain data indicating whether or not the oven tray 17 is supported by each supporting portion 18. The position of the oven dish 17 (upper stage only, lower stage only, upper and lower two stages) is determined in step S12.

Then, when the oven plate 17 is arranged only in the upper stage, in step S13, the movable plate 33 is lowered to the lowermost portion, the lower opening 29 is entirely closed, and only the upper opening 28 is heated. The heating cooking is performed in such a manner as to be supplied. On the other hand, when the oven plate 17 is arranged only in the lower stage, in step S14, the movable plate 33 is raised to the uppermost part to block the entire upper opening 28, and hot air is supplied only from the lower opening 29. The cooking is performed in such a mode. Further, when the oven pans 17 are arranged in the upper and lower two stages, in step S15, the movable plate 33 is positioned in the central portion where it wraps with the fixed plate 32, and both the upper opening 28 and the lower opening 29 are fully opened. Thus, the heating and cooking is performed in such a manner that hot air is supplied from the upper side and the lower side of the oven chamber 12.

Therefore, according to the present embodiment, when the oven cooking mode is executed, the upper opening 28 and the lower opening 29 are opened depending on the arrangement of the oven plate 17 and the support position of the food in the oven chamber 12. The opening area was changed, and in any case, it became possible to carry out oven cooking with a proper heating mode. As a result, the cooking quality of oven cooking can be improved. In this case, conventionally, if the user misplaces the oven dish 10, there is a problem that the quality of cooking becomes poor.
In the present embodiment, the user can arbitrarily select the arrangement position of the oven plate 17, and no matter where the oven plate 17 is arranged, there is no risk of deteriorating the quality of cooking.

(3) Other Embodiments Although not shown, other embodiments of the present invention will be described below. As a third embodiment of the present invention, the oven cabinet 12
A baking color sensor for detecting the baking color of the food contained therein is provided, and the control unit 36 serving as a control means is provided with the upper opening 2 at the beginning of cooking when the oven cooking mode is executed.
8 and the lower opening 29 are opened, and after the baking color sensor detects a predetermined baking color, control is performed such that the opening area of the lower opening 29 is larger than that of the upper opening 28. It is possible (corresponding to claim 5). In this case, a CCD camera or the like can be adopted as the burn color sensor.

Here, in the oven cooking mode,
It is required that the surface of the food to be cooked is appropriately browned and that the inside of the food is sufficiently heated. The supply of hot air from 28 is effective, and the supply of hot air from the lower opening 29 is not so effective for darkening the baked color, but is effective for sufficiently heating the inside of the food. .

Therefore, according to the third embodiment, by controlling the opening / closing mechanism 31 based on the detection of the baking color sensor, it is possible to prevent the baking color of the cooking product from becoming too dark, It is possible to carry out the oven cooking in a heating mode in which the food can be sufficiently heated while ensuring an appropriate baking color without causing insufficient heating.

By the way, the above-mentioned upper opening 28 and lower opening 29 are formed by punching holes as in the prior art, and unlike the supply port 8, microwaves can be transmitted, so that they affect cooking during range cooking. Can be given.
That is, when the range cooking mode is executed, by changing the opening areas of the upper opening 28 and the lower opening 29, it is possible to change the mode of the microwave intensity distribution in the oven chamber 12 and thus the so-called oven impedance. Of.

Therefore, as a fourth embodiment of the present invention, when the weight of the food detected by the weight sensor 16 is larger than a predetermined weight during execution of the range cooking mode, the control unit 36 as the control means is used. The opening area of the upper opening 28 is made larger than that of the lower opening 29, and when the weight is not more than a predetermined weight, the opening area of the lower opening 29 is made larger than that of the upper opening 28. Is possible (corresponding to claim 6).

In this case, according to the experiment and research by the present inventor, in the case where the food to be cooked is relatively large, it is better to make the opening area of the upper opening 28 larger than that of the lower opening 29. If a microwave intensity distribution with better heating efficiency can be obtained and the food to be cooked is relatively small, on the contrary, it is better to make the opening area of the lower opening 29 larger than that of the upper opening 28. It was confirmed that the heating efficiency was improved.

Therefore, according to the fourth embodiment, when the range cooking mode is executed, the range cooking is executed while the inside of the oven chamber 12 is set to an appropriate oven impedance according to the weight and thus the size of the food to be cooked. can do. As a result, it is possible to further improve the efficiency of range cooking as compared with the conventional case.

Then, as a fifth embodiment of the present invention, the control unit 36 as the control means controls the gas concentration in the oven chamber 12 detected by the gas sensor 22 to reach a predetermined value during execution of the range cooking mode. Up to the upper opening 2
8 and the lower opening 29 have the same opening area, and after the gas concentration exceeds a predetermined value, the lower opening 29 is controlled to have a larger opening area than the upper opening 28. It is possible (corresponding to claim 7).

In this case, according to the experiments and studies by the present inventor, it is possible to improve the heating efficiency by changing the oven impedance in accordance with the progress of heating cooking when the range cooking mode is executed. It was recognized that they could. That is, at the beginning of cooking, the opening areas of the upper opening 28 and the lower opening 29 are made equal, and after the cooking has progressed to some extent, the lower opening 2
The heating efficiency is improved by making the opening area of 9 larger than that of the upper opening 28. At this time, the progress of cooking can be known based on the detection by the gas sensor 22.

Therefore, according to the fifth embodiment, an appropriate oven impedance according to the progress of cooking can be obtained and efficient range cooking can be executed.

Furthermore, as a sixth embodiment of the present invention,
Whether the oven 36 or the range cooking mode is executed by the control unit 36 as a control unit, the opening areas of the upper opening 28 and the lower opening 29 are set to be equal at the beginning of the execution of the cooking. It is possible to adopt a configuration in which the opening area of the lower opening portion 29 is made larger than that of the upper opening portion 28 in accordance with the above-mentioned step (corresponding to claim 8).

According to this, since the baking color of the cooked food in the third embodiment and the gas concentration in the sixth embodiment are related to the elapsed cooking time, the detection of the baking color sensor and the gas sensor 22 are performed. Instead of the above detection, the same action and effect can be obtained by changing the opening areas of the upper opening 28 and the lower opening 29 based on the passage of time. Therefore, according to the sixth embodiment, it is possible to perform the oven cooking that can sufficiently heat the food while ensuring an appropriate brown color, and also to perform the efficient range cooking. Is something that can be done.

Besides, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the invention. For example, an opening / closing mechanism may be used as the upper opening 28.
The lower opening 29 and the lower opening 29 may be opened and closed separately. At this time, the control means for controlling the opening / closing mechanism is used to prevent electric wave leakage by closing both openings 28 and 29, for example, when the range cooking mode is executed, based on whether the cooking mode to be executed is range cooking or oven cooking. When the oven cooking mode is executed, control is performed so that both openings 28, 29 are opened (corresponding to claim 2), and the opening forms of the openings 28, 29 are set according to the cooking mode. Is what you can do.

[0061]

As is apparent from the above description, the present invention has the following excellent effects. That is, according to the microwave oven with an oven function of claim 1, an oven cabinet in which food is stored, a microwave oven for supplying microwaves to the oven cabinet, and an outside of one side wall of the oven cabinet. A hot air generating device for oven cooking, which is provided with a heater and a fan in a casing provided in the casing, and hot air from the hot air generating device provided on the upper side and the lower side of one side wall of the oven chamber, Since it is provided with openings for supplying into the interior and an opening / closing mechanism for changing the opening area of these openings, it is possible to improve the cooking quality of oven cooking, and also to improve the efficiency of range cooking. It is possible.

In this case, if a control means for controlling the opening / closing mechanism is provided based on whether the cooking mode to be executed is range cooking or oven cooking (microwave oven with oven function of claim 2), for example, when the range cooking mode is executed. By closing the opening to prevent radio wave leakage and opening the opening when the oven cooking mode is executed, the opening of the opening can be changed according to the cooking mode.

According to the microwave oven with an oven function of the third aspect, the shape sensor for detecting the shape of the food when the oven cooking mode is executed, and the control means for controlling the opening / closing mechanism based on the detection are provided. Therefore, the oven cooking can be performed in an appropriate heating mode according to the shape of the food.

According to the microwave oven with an oven function of the fourth aspect, in the case where the oven dishes can be arranged in upper and lower two stages when the oven cooking mode is executed, the opening / closing mechanism is controlled according to the arrangement of the oven dishes. Since the control means is provided, it is possible to carry out the oven cooking in an appropriate heating mode according to the arrangement of the oven dish and the support position of the food item in the oven chamber.

According to the microwave oven with an oven function of the fifth aspect, the baking color sensor for detecting the baking color of the food in the oven cooking mode and the control means for controlling the opening / closing mechanism based on the detection are provided. The oven cooking can be performed in a heating mode in which the food can be sufficiently heated while ensuring an appropriate brown color.

On the other hand, according to the microwave oven with the oven function of the sixth aspect, the weight sensor for detecting the weight of the food and the control means for controlling the opening / closing mechanism on the basis of the detection when the range cooking mode is executed. Since it is provided, the range cooking can be performed in a state where the inside of the oven has an appropriate oven impedance according to the weight of the food to be cooked, and thus the size of the food.

According to the microwave oven with an oven function of claim 7, when the microwave oven cooking mode is executed,
Since the gas sensor for detecting the gas concentration and the control means for controlling the opening / closing mechanism based on the detection are provided, an appropriate oven impedance according to the progress of cooking can be obtained,
Efficient range cooking can be performed.

Further, according to the microwave oven with an oven function of the eighth aspect, the opening areas of the upper and lower openings are made equal at the beginning of the cooking, and the lower side is advanced as the cooking progresses. Since the control means for controlling the opening / closing mechanism is provided so that the opening area of the opening of the above is larger than that of the upper side, the oven cooking capable of sufficiently heating the cooked food while ensuring an appropriate brown color is executed. It is also possible to perform efficient range cooking.

[Brief description of drawings]

FIG. 1 is a front view of a microwave oven using a perspective method according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view of the hot air generating device portion.

FIG. 3 is a rear view of the back wall portion.

FIG. 4 is a perspective view from the back side showing the drive configuration of the movable plate.

FIG. 5 is a block diagram showing an electrical configuration of a main part centered on a control unit.

FIG. 6 is a flowchart showing the control procedure of the opening / closing mechanism.

FIG. 7 is a diagram corresponding to FIG. 6 showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 2 showing a conventional example.

[Explanation of symbols]

In the drawings, 11 is a main body, 12 is an oven, 12a is a back wall (one side wall), 12b is an opening, 16 is a weight sensor, 17
Is an oven dish, 19 is a shape sensor, 20 is an optical sensor, 2
2 is a gas sensor, 23 is a hot air generator, 24 is a casing, 25 is a centrifugal fan (fan), 26 is a heater, 28
Is an upper opening, 29 is a lower opening, 30 is a suction port, 31
Is an opening / closing mechanism, 32 is a fixed plate, 33 is a movable plate, 34 is a motor, and 36 is a control unit (control means).

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F24C 7/08 335 F24C 7/08 335

Claims (8)

[Claims] 1. An oven for accommodating food to be cooked, a magnetron for microwave cooking for supplying microwaves into the oven, and a heater and a fan in a casing provided outside one side wall of the oven. A hot air generating device for oven cooking configured, and an opening for supplying hot air from the hot air generating device to the inside of the oven provided on the upper side and the lower side of one side wall of the oven.
A microwave oven with an oven function, comprising an opening / closing mechanism for changing the opening area of these openings. 2. The microwave oven with an oven function according to claim 1, further comprising control means for controlling an opening / closing mechanism based on whether the cooking mode to be performed is range cooking or oven cooking. 3. A shape sensor for detecting the shape of a food item stored in an oven is provided, and when the shape detected by the shape sensor is vertically long during execution of the oven cooking mode, the upper side and the lower side. The opening means has a substantially equal opening area, and when the opening is flat, a control means for controlling the opening / closing mechanism is provided so that the opening area of the lower opening is larger than that of the upper opening. Microwave oven with oven function described in 1. 4. An oven dish supporting food to be cooked can be arranged in upper and lower two stages in the oven chamber, and when the oven dish mode is executed, the oven dishes are arranged only in the upper stage. , The opening area of the opening on the upper side is made larger than that on the lower side, and when the oven dish is arranged only in the lower stage, the opening / closing mechanism is controlled so that the opening area of the opening on the lower side is made larger than that on the upper side. The microwave oven with an oven function according to claim 1, further comprising: 5. A baking color sensor for detecting a baking color of a food item stored in an oven is provided, and when the baking color sensor detects a predetermined baking color during execution of an oven cooking mode, a lower part is provided. The microwave oven with an oven function according to claim 1, further comprising control means for controlling the opening / closing mechanism so that the opening area of the side opening is larger than that of the upper side. 6. A weight sensor for detecting the weight of a food item stored in an oven is provided, and the opening on the upper side is provided when the weight detected by the weight sensor is larger than a predetermined weight when the range cooking mode is executed. A control means for controlling the opening / closing mechanism such that the opening area of the opening is larger than that of the lower side and the opening area of the opening of the lower side is larger than that of the upper side when the weight is not more than a predetermined weight is provided. Item 1. A microwave oven with an oven function according to item 1. 7. A gas sensor for detecting the concentration of gas released from the cooked food stored in the oven chamber,
When the range cooking mode is executed, the opening areas of the upper side opening and the lower side opening are made equal until the detected concentration of the gas sensor reaches a predetermined value, and after reaching the predetermined value or more, the lower side opening is opened. 2. The microwave oven with an oven function according to claim 1, further comprising a control means for controlling the opening / closing mechanism so that the opening area of the microwave oven is larger than that on the upper side. 8. At the beginning of cooking, the opening areas of the upper and lower openings are made equal, and the opening area of the lower opening is made larger than the upper area as the cooking progresses. The microwave oven with an oven function according to claim 1, further comprising control means for controlling the opening / closing mechanism.