JPH03199820A - Heating and cooking device - Google Patents

Abstract

PURPOSE:To enable a cooking with one heating and cooking device to be attained for two cooking and heating devices by a method wherein an upper surface of an outer box is provided with a thermal dispersion opening for dispersing heat of an upper heater upwardly, a shutter for opening or closing the opening and a cooked item mounting part in which this shutter can be released and the cooked item can be mounted in correspondence with the thermal dispersion opening. CONSTITUTION:A ceiling part of a heating and cooking chamber 2 within an outer box 1 is provided with upper heaters 13 to 15. The upper surface of the outer case 1 is provided with a thermal dispersion opening 18 for thermally dispersing its heat upwardly, a shutter 19 for opening or closing the opening 18 and a cooked item mounting part 17 in which a cooked item can be mounted under a released condition of the shutter in correspondence with the thermal dispersion opening. In the event that a pan cooking which can not be cooked within the heating and cooking chamber is to be carried out, the shutter is released, a pan 53 is mounted on a cooked item mounting part and an upper heater is electrically energized, resulting in that the pan is heated by the generated electrical heat and then a cooking is carried out. In the event that a bread toasting or a grill cooking is to be carried out, the shutter is closed, the cooked item is stored in the heating and cooking chamber and the upper heater is electrically energized. In this case, the electrical energization passage for a lower heater 11 is shut off in cooperation with the releasing operation of the shutter and at the same time the heating amount of the upper heater is increased and the heater changing- over switch 39 can be automatically changed over.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a cooking device in which an upper heater is provided on the ceiling of a heating cooking chamber.

(Prior Art) In recent years, for example, some microwave ovens have been equipped with an upper heater on the ceiling of the cooking chamber, and the upper heater generates heat to toast bread or grill food. .

(Problem to be Solved by the Invention) By the way, the cooking that is done using the upper heater in the heating cooking chamber is toasting bread and grilling, and for foods that cannot be cooked in the heating cooking chamber, the upper heater is not used. For example, you will be cooking on a separate electric stove. For this reason, not only can you not use the microwave effectively, but
The disadvantage is that the number of heating cookers required at home increases.

The present invention has been made in consideration of these circumstances, and its purpose is to increase the number of menus that can be cooked and to provide a heating cooker that can serve as two conventional cooking devices. .

[Structure of the Invention] (Means for Solving the Problems) The cooking device of the present invention is provided with a heating cooking chamber in the outer box and an upper heater on the ceiling of the heating cooking chamber. A heat dissipation opening formed on the top surface of the outer box to dissipate the heat of the upper heater upward; a shutter for opening and closing the heat dissipation opening; and a shutter for opening and closing the heat dissipation opening; The food storage device is provided with a food placement portion that is provided so as to be placed so as to correspond to the heat dissipation opening.

In this case, a lower heater is provided at the bottom of the cooking chamber, and a heater changeover switch is provided that can be switched to cut off the electrical path to the lower heater and increase the amount of heat generated by the upper heater in conjunction with the opening operation of the shutter. It is also possible to have a different configuration.

(Function) When cooking a dish that cannot be cooked in the heating cooking chamber, for example, cooking in a pot, the shutter is opened and the pot is placed on the food placement section. Then, when the upper heater is energized to generate heat, the pot is heated by the heat radiated upward from the upper heater, and cooking is performed. In addition, when toasting bread or grilling, it is sufficient to close the shutter and store the food in the heating cooking chamber, and then energize the upper heater.

In this case, the operation can be simplified by automatically switching the heater selector switch so that the current flow to the lower heater is cut off and the heat generation amount of the upper heater is increased in conjunction with the opening operation of the shutter. When the shutter is opened (during cooking in a pot, etc.), there is no need to waste electricity to the lower heater, and the upper heater allows efficient cooking.

(Example) Hereinafter, a first example in which the present invention is applied to a microwave oven will be described with reference to FIGS. 1 to 5.

Reference numeral 1 denotes an outer box of the microwave oven, and an inner box 3 constituting a heating cooking chamber 2 is provided inside the outer box. A magnetron 5 is provided on the right side of the inner box 3 via a waveguide 4, and high frequency waves generated by the magnetron 5 are introduced into the cooking chamber 2 through the waveguide 4. Furthermore, magnetron 5
A blower fan 7 and a high-voltage transformer 8 are installed in the machine room 6 where the air blower 7 is placed.

On the other hand, a motor 9 is provided below the bottom of the inner box 3, and a rotating shaft 9a of the motor 9 protrudes upward into the bottom of the heating cooking chamber 2, and a food placing plate 10 is attached to the upper end of the rotating shaft 9a. There is. A lower heater 1 is disposed between the food tray 10 and the bottom of the inner box 3.

On the other hand, a heater housing part 12 is formed on the upper surface of the inner box 3 by, for example, drawing so as to protrude upward, and three upper heaters made of, for example, straight tube halogen lamps are installed in this heater housing part 12. -3 to 15 are arranged in three rows, front and rear. The lower surface of the heater housing section 12 is closed with a punching metal 16, and the radiant heat from the upper heaters 3 to 15 is transferred to the heating cooking chamber through the small holes of the punching metal 16.
It is designed so that it can be irradiated internally. In this case, the diameter of the small hole in the punching metal 16 is set to a size that substantially blocks passage of high frequency waves.

Further, a crystallized heat-resistant glass 17 serving as a food placing portion is attached to the upper opening of the heater storage portion 12 so as to close the opening. Correspondingly, a heat dissipation opening 18 is formed on the upper surface of the outer box 1, and the heat dissipation opening 18 faces the crystallization heat resistant lath 17 and the upper heaters 3 to 15. A shutter 19 for opening and closing the heat dissipation opening 18 is provided so as to be slidable from side to side inside the outer box 1 along its upper surface via a guide member 20. A knob 21 is provided on the left end of the upper surface of the shutter 9, and this knob also functions as a stopper for regulating the sliding amount of the shutter 9 between the closed position and the open position. In this case, at least the lower surface portion of the shutter 9 is formed of a glossy material with high heat reflectance, and when the shutter 19 is closed, the lower surface reflects heat toward the heating cooking chamber 2 side. Furthermore, the shutter
9 is formed in a size that fits in the upper part of the machine room 6 when opened.

On the other hand, a door 2 for opening and closing the heating cooking chamber 2 is provided on the front of the outer box 1.
2 (see Figure 2) and an operation panel 23 (see Figure 4).The operation panel 23 has keys 24 to 24 for "range", "toaster", "stove/grill", "cancel", and "start". 28, two output adjustment knobs and display panel 3
0 etc. is provided.

Next, the electric circuit configuration will be explained based on FIG. 3. One power line 32a connected to the commercial power source 31 is connected to one end of the primary coil 8a of the high voltage transformer 8 via a fuse 33, a thermal switch 34, a first door switch 35, and a relay switch 36 for output adjustment. There is. Further, the other power line 32b is connected to the second door switch 37.
, the high voltage transformer 8 is connected in order between the main relay switch 38 and the three contacts (39a-39b) of the heating changeover switch.
It is connected to the other end of the primary coil 8a.

The first and second door switches 35, 37 are turned on when the door 22 is closed, and the monitor switch 4o is turned off at this time. In addition, both power supply lines 32
Between a and 32b, a motor 9 for rotating the food tray 10 times,
A motor 7a and an interior light 41 are provided, and a relay switch 42 is connected in series to the interior light 41.

On the other hand, a magnetron drive circuit 43 is connected to the secondary coil 8b of the high voltage transformer 8, and its DC output is applied between the anode and cathode of the magnetron 5.

Of the three upper heaters 13 to 15, the central upper heater 14 is connected between the fixed contacts 39c of the three heating changeover switches and the power supply line 32a. The upper heaters 13 and 15 on both sides are connected in parallel between the fixed contact 44c of the heater changeover switch 44 and the power line 32a. Furthermore, the fixed contact 44 of the heater changeover switch 44
The down converter 11 is connected between the power line 32b and the power source line 32a, and the movable contact 44a of the heater changeover switch 44 is connected to the fixed contact 39c side of the heating changeover switch 39.

On the other hand, the control circuit 45 that controls heating and cooking has a built-in microcomputer, and controls energization/disconnection of the five relay coils 46 to 50 based on the output of the microcomputer. The first relay coil 46 drives the relay switch 42 that turns on and off the interior light 41, the second relay coil 47 drives the main relay switch 38, and the third
The second relay coil 48 drives the heating changeover switch 39, the fourth relay coil 49 drives the heater changeover switch 44, and the fifth relay coil 5° drives the output adjustment relay switch 36. drive

In addition, 51 is a buzzer that sounds when cooking is completed, and 52 is a door monitor switch.

Next, the operation of the above configuration will be explained.

(1) When toasting bread in cooking chamber 2,
The bread is stored in the heating cooking chamber 2 and the door 22 is closed, and the shutter 9 is also closed (the state shown by the two-dot chain line in FIG. 1). Then, when the "toaster" key 25 is pressed, the heating selector switch 39 switches to the contacts (39a-39c).
The heater selector switch 44 is switched to open/close.
The contacts (44a-44b) are switched to open and close. As a result, only the central upper heater 14 among the three upper heaters 13 to 15 is energized, and the lower heater 11 is also energized, so that the bread is baked from both the upper and lower sides.

At this time, the heat dissipation opening 18 on the top surface of the outer box 1 is closed by the shutter 19, so no heat escapes from here, and the heat is reflected toward the heating cooking chamber 2 side by the bottom surface of one shutter. be able to.

(2) When grill cooking is to be performed in the heating cooking chamber 2, the food to be cooked is placed in the heating cooking chamber 2 and the "stove/grill" key 26 is pressed. As a result, the heater changeover switch 44 is switched to open/close the contacts (44a-44c), the lower heater 11 is cut off, and all three upper heaters 13 to 15 are energized, and these three upper heaters 1
Grill cooking is performed in steps 3 to 15. At this time too,
The heat dissipation opening 18 on the top surface of the outer box 1 is closed with a shutter 19.

0 (3) On the other hand, when cooking food that cannot be cooked in the heating cooking chamber 2, for example cooking in a pot on the stove, the shutter 19 is opened as shown by the solid line in FIGS. 1 and 2. ,
After placing the pot 53 on the crystallized glass 17, the "stove/grill" key 26 is pressed once as in grill cooking. This causes the heating changeover switch 39 to switch to the contact point (39a
-39C) At the same time, the heater selector switch 44 is switched to open/close the contacts (44a-44c), the lower heater 11 is cut off, and all three upper heaters 13 to 15 are energized. Ru. The heat from these three upper heaters 13 to 15 passes through the upper crystallized heat-resistant glass 17 and heats the pot 53.

(4) When toasting bread or grilling,
By opening one shutter, toasting or grilling of bread can be simultaneously carried out in the heating cooking chamber 2, and "stovetop cooking" such as cooking in a pot on the crystallized heat-resistant glass 17 can be carried out at the same time.

(5) On the other hand, when heating food in the cooking chamber 2 in the microwave, it is sufficient to press the "Microwave" key 24. This causes the heating selector switch 39 to switch to the contact (
39a-39b) switched to open/close configuration, high voltage transformer 8
The primary coil 8a is energized, the magnetron 5 is driven, and microwave heating is performed.

(6) If cooking is to be performed using both microwave heating and heater heating, press the "stove/grill" key 26 twice. As a result, the movable contact 39a of the heating changeover switch 39 is alternately and repeatedly switched between the body fixed contacts 39b and 39c, and microwave heating and heater heating are alternately and repeatedly performed.

At this time, heater heating is performed using three upper heaters 13 to 15.
carried out by Therefore, by opening the shutter 19, cooking in a pot or the like can be done on the crystallized glass 17.

In this case, by rotating the output adjustment knob 29, the switching timing of the three heating changeover switches (ratio of microwave heating to heater heating) can be adjusted.

The types of cooking, operation keys, and switches 39 explained above.
The relationship between the switching of the shutter 44 and the opening and closing of the shutter 19 is shown in FIG.

2 In the first embodiment described above, the heater changeover switch 44 is switched by the user by operating the keys 25 and 26, but as in the second embodiment of the present invention shown in FIGS. Alternatively, the heater changeover switch 44 may be configured to be automatically switched in conjunction with the opening/closing operation of the shutter 19. Specifically, as shown in FIG.
4 is attached to the upper part of the machine room 6, and when the shutter 19 is opened, the shutter 19 switches to the heater changeover switch 44.
The contacts (44a-44
c) It is designed to be switched between open and closed configurations. and,
When one shutter is closed, the shutter 19 moves away from the actuator 54, and the heater changeover switch 44 contacts (
44a-44b) Automatically switched between open and closed configurations. Therefore, the four relay coils in the first embodiment are omitted (see FIG. 7).

As shown in FIG. 8, the second embodiment has one less operation key than the first embodiment (there is no "stove/grill" key 26).

3 In this case, when cooking on the stove such as pot dishes,
When the "toaster" key 25 is pressed and the shutters 19 are opened, one of the shutters is connected to the heater selector switch 44.
The contacts (44a-44
c) Switched to open/closed configuration. As a result, the lower heater 11 is automatically cut off, and the three upper heaters 13 to 1
5 are all energized, and these three upper heaters 13 to 15
With this, it is possible to cook food in a pot on the crystallized glass 17.

On the other hand, when toasting bread, if the "toaster" key 25 is pressed and the shutter 19 is closed, the shutter 19 is separated from the actuator 54 of the heater changeover switch 44, causing the contacts (44a-44b) to open and close. can be switched to As a result, only the central upper heater 14 among the three upper heaters 13 to 15 is energized, and the lower heater 11 is also energized, so that the bread is baked from both the upper and lower sides.

In the second embodiment, the heater changeover switch 44 is automatically changed over in conjunction with the opening and closing of the shutter 19, so the operation is easier than when this changeover is performed manually. Moreover, when the shutter 19 is opened (during cooking in a pot, etc.), the automatic switching of the heater changeover switch 44 eliminates unnecessary energization of the lower heater 11, and allows the upper heaters 13 to 15 to cook efficiently. I can do it.

In each of the above embodiments, three upper heaters 13 to 15 are provided, but the number may be two or less or four or more. Furthermore, the heaters 13 to 15 are not limited to straight tube type halogen lamps, but may be other electric heaters such as circular tube type halogen lamps or sheathed heaters.

In addition, the present invention can be widely applied and practiced not only to the microwave oven as in the above embodiment but also to a general electric oven, etc. that does not have a microwave heating function.

[Effects of the Invention] As is clear from the above description, the present invention includes a heat dissipation opening formed on the top surface of an outer box having a heating cooking chamber inside, and a shutter for opening and closing the heat dissipation opening. established,
Since the shutter is in the open state 5, the food can be heated and cooked by placing the food in a position corresponding to the heat dissipation opening. However, you can use the upper heater to cook hot pot dishes, increase the number of menus that can be cooked, and use one device to perform the functions of two conventional devices, making it extremely convenient.

In this case, the operation can be simplified by automatically switching the heater selector switch so that the current flow to the lower heater is cut off and the heat generation amount of the upper heater is increased in conjunction with the opening operation of the shutter. When the shutter is opened (during cooking in a pot, etc.), there is no need to waste electricity to the lower heater, and the upper heater allows efficient cooking.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is an overall longitudinal sectional front view, FIG. 2 is an overall longitudinal sectional side view,
FIG. 3 is an electric circuit diagram, FIG. 4 is a front view of the operation panel, and FIG. 5 is a diagram showing the relationship between the type of cooking, operation keys, switching of switches, and opening/closing of the shutter. 6 to 8 show a second embodiment of the present invention, in which FIG. 6 is a longitudinal sectional front view of the main parts, FIG. 7 is an electric circuit diagram, and FIG. 8 is a front view of the operation panel. It is a diagram. In the drawing, 1 is an outer box, 2 is a cooking chamber, 5 is a magnetron, 6 is a machine room, 11 is a lower heater, 12 is a heater storage area,
13 to 15 are upper heaters, 16 is punching metal, 1
7 is crystallized heat-resistant glass (food placing part), 18 is an opening for heat dissipation, 1 is a shutter, 3 is a heating selector switch,
44 is a heater changeover switch.

Claims (1)

[Scope of Claims] 1. In a cooking device in which a heating cooking chamber is provided in an outer box and an upper heater is provided on the ceiling of the heating cooking chamber, the heat of the upper heater is directed upward onto the upper surface of the outer box. a shutter for opening and closing the heat dissipation opening formed to dissipate the heat to the heat dissipation opening; and a shutter for opening and closing the heat dissipation opening; and in an open state of the shutter, food to be cooked can be placed in correspondence with the heat dissipation opening. A heating cooker comprising a food placing part provided as shown in FIG. 2. A lower heater is provided at the bottom of the heating cooking chamber, and a heater changeover switch is provided that can be switched to cut off the electrical path to the lower heater and increase the heat generation amount of the upper heater in conjunction with the opening operation of the shutter. The heating cooker according to claim 1, characterized in that: