JPH0611142A - Heating cooking apparatus - Google Patents

Abstract

PURPOSE:To obtain a heating cooling apparatus in which an operability can be improved by reducing the necessary number of times of operations for one time cooking. CONSTITUTION:An oven toaster has a door which is automatically opened/closed by an operation of a door opening/closing switch 43 through an automatic opening/closing mechanism. A controller 57 is operated by cooking switches 45-50 provided separately from the switch 43. The door is closed under the control of the controller 57 through the mechanism, electric heaters 5, 6 in a cooking chamber 2 are then energized, deenergized after a heating cooking time determined in response to cooking modes of the switches 45-50 is elapsed. Then, the door is fully opened through the mechanism, thereby reducing the necessary number of times of operations for one time cooking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker, such as an oven toaster or a microwave oven, having a built-in electric heater for heating an object to be cooked in a cooking chamber.

[0002]

2. Description of the Related Art In a conventional oven toaster, a door for opening and closing a front opening of a cooking chamber is manually opened and closed. In addition, in the conventional microwave oven, it is known that the door is automatically opened and closed by operating a button.

[0003]

As described above, in the case where the door is opened and closed manually, in one cooking operation, the door is opened, the food is put in the cooking chamber, and then the door is closed.
Next, it is necessary to turn on the cooking switch, open the door after cooking is completed, and take out the food to be cooked from the cooking chamber. There is also a problem that a finger may come into contact with the hot door when opening and closing the door after cooking. Also, opening and closing the door by operating the button has the advantage of preventing fingers from touching the hot door, but opening and closing the door only replaces pressing the button. This does not mean that the number of times to bother is reduced, and in that sense, there is a problem that operability is still poor.

An object of the present invention is to obtain a heating cooker capable of improving the operability by reducing the number of operations required for one cooking.

[0005]

In order to achieve the above object, a heating cooker according to claim 1 is a cooker main body having a cooking chamber in which a front surface is opened and an electric heater is incorporated, and the cooker. A door that is movably attached to the main body and that opens and closes the front opening of the cooker main body; an automatic door opening and closing mechanism that is provided in the cooker main body and that opens and closes the door using a door motor as a power source; The attached cooking switch and the electric heater is energized after the door is closed through the door automatic opening / closing mechanism based on the turning on of the cooking switch, and the cooking switch is set according to the cooking mode of the cooking switch. Attached to the cooker body and a control device for stopping the energization of the electric heater and opening the door through the door automatic opening / closing mechanism after the lapse of the cooking time. Via the serial controller is obtained by and a door limit switch for operating the door automatic opening and closing means.

In order to achieve the above-mentioned object and to prevent forgetting to close the door after completion of cooking, the heating cooker according to claim 2 has a cooking chamber in which a front surface is opened and an electric heater is incorporated. A cooker body, a door that is movably attached to the cooker body and opens and closes a front opening of the cooker body, and a door that is provided in the cooker body and that opens and closes the door using a door motor as a power source. A mechanism, a cooking switch attached to the cooker main body, and when the cooking switch is turned on, the electric heater is energized after the door is closed via the door automatic opening / closing mechanism. After the heating and cooking time determined according to the cooking mode of (1) has elapsed, the power supply to the electric heater is stopped and the door is opened through the door automatic opening / closing mechanism. A control device for closing the door via the door automatic opening / closing mechanism after a predetermined time from, and a door opening / closing switch attached to the cooker main body for operating the door automatic opening / closing means via the control device. Is.

[0007]

In the structure of claim 1, the automatic door opening / closing mechanism opens and closes the door by interlocking with the door that opens and closes the front opening of the cooking chamber by its operation. The door opening / closing switch that is manually operated operates the automatic door opening / closing mechanism at a necessary time such as when the food is put in or taken out of the cooking chamber. The cooking switch operated manually is
The electric heater in the cooking chamber is energized according to a cooking mode preset according to the object to be cooked. Then, the control device closes the door through the automatic door opening / closing mechanism based on the closing of the cooking switch, then energizes the electric heater, and the heating and cooking time determined according to the cooking mode of the cooking switch elapses. After that, stop energizing the electric heater,
Open the door through the automatic door opening / closing mechanism. Therefore, simply open the door by opening the door open / close switch, put the food in the cooking chamber, and then turn on the cooking switch, and after cooking without the need to open the door. The door can be opened automatically.

Further, in the structure of claim 2, the control device opens the door after cooking by the same operation as in claim 1 and closes the door via the automatic door opening / closing mechanism after a predetermined time from that point. . Therefore, simply open the door by opening the door open / close switch, put the food in the cooking chamber, and then turn on the cooking switch, and after cooking without the need to open the door. Not only can the door be opened automatically, but the opened door can then be closed automatically.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 in FIGS. 3 to 6 denotes a metal cooker body having a cooking chamber 2 (see FIG. 5) having an opened front surface. The main body 1 defines a cooking chamber 2 and has an inner box 3 whose inner surface is a reflecting surface, and an upper surface of the inner box 3.
It is provided with an outer box 4 that covers both side surfaces and the rear surface and has a heat dissipation hole (not shown).

An upper electric heater 5 and a lower electric heater 6 which extend horizontally in the left-right direction are incorporated in the cooking chamber 2, respectively. As the heaters 5 and 6, quartz tube heaters in which a nichrome wire is passed through a transparent quartz tube are used, and both ends thereof are supported by the left and right side walls 3a of the inner box 3 via insulators, respectively.

Located between the upper and lower electric heaters 5, 6 is a built-in grill 7 which is movable in the front-rear direction in the cooking chamber 2.
The grill 7 has a pair of front and rear slide shafts 7a and 7b, and the ends of the shafts 7a and 7b penetrate a guide hole 8 formed in the left and right side walls 3a extending in the front and rear direction. Supported. The grill 7 is reciprocally moved forward and backward along a guide hole 8 in conjunction with an automatic door opening / closing mechanism described later, and when the grill 7 is moved forward, the front portion of the grill 7 comes forward from the front opening of the cooking chamber 2. (See FIG. 4).

The bottom of the cooking chamber 2 is formed by a bottom reflector 9. The reflector 9 has a front panel portion 9a located on the front surface of the cooker main body 1 also as a handle, and is provided in front of the cooker main body 1 so as to be drawn out. The bottom reflector 9 has a shallow plate portion for receiving bread crumbs falling from the bread or the like on the grill 7, and is moved in the front-rear direction by using the upper surface of the guide plate 10 shown in FIGS. It has become so.

The cooker main body 1 is provided with an automatic door opening / closing mechanism 11 shown in FIGS. That is, reference numeral 12
Is a motor fixing plate, and the motor 13 is fixed to a portion of the inner box 3 parallel to the lower inner surface of one side wall 3a. The output shaft 13a of the motor 13 penetrates through the motor fixing plate 12 and the one side wall 3a and is projected into a side space between the side walls 3a and 4a of the inner box 3 and the outer box 4 at the penetrating end. Has a drive gear 14 attached. Although not shown, the rotation of the motor 13 is detected every 180 ° by a rotation detecting means including a cam provided on the output shaft 13a of the motor 13 and a micro switch opened / closed by the cam.

A gear shaft 15 is rotatably provided horizontally between the lower portions of both side walls 3a of the inner box 3, and a driven gear 16 is attached to one end of the shaft 15 penetrating the motor fixing plate 12. . The gear 16 is meshed with the drive gear 14. A link operating arm 17 is screwed to the driven gear 16.

A vertically standing support plate 18 is provided in a side space between the one side wall 3a of the inner box 3 and one side wall 4a of the outer box 4 opposed to the one side wall 3a. A door support lever 20 is rotatably supported on the shaft via a pivot 19. The pivot 19 penetrates the door supporting lever 20 through a substantially central portion in the longitudinal direction to support the lever 20. One end of a link 21 is rotatably connected to a lower end of the door support lever 20 via a pivot 22, and the other end of the link 21 is pivotally connected to a tip of a link operating arm 17 via a pivot 23. Connected as possible. 3 and 4
The center 24 is an arc-shaped escape hole provided in the support plate 18 to escape the pivot 22.

The parts 16 to 23 except the motor 13 and the drive gear 14 are the main parts of the automatic door opening / closing mechanism. Further, in the side space between the other side wall (not shown) of the inner box 3 and the other side wall 4a (see FIG. 6) of the outer box 4 facing the side wall, the same parts as those of the mechanism main part are provided. A combined mechanism main part (not shown) is provided.
Of course, the driven gear of this mechanism main part is attached to the other end of the gear shaft 15. Further, a fixing plate (not shown) facing the inner surface of the other side wall (not shown) of the inner box 3
Is provided.

At the upper end of each door support lever 20 of the automatic door opening / closing mechanism 11 having the above-mentioned structure, the door 2 is attached via a pivot 25.
The upper end of 6 is rotatably supported. The door 26 opens and closes the front opening of the cooking chamber 2, and is formed by fitting a transparent glass window into the door frame. The opening / closing operation of the door 26 is performed by the automatic door opening / closing mechanism 11.

That is, when the motor 13 is operated with the door 26 closed, the drive gear 14 to the driven gear 16 are moved.
Since the rotation in the direction of the arrow in FIG. 3 is transmitted to the door, the link 21 is moved diagonally downward to the front side via the link operating arm 17 that is simultaneously rotated integrally with the driven gear 16, and the door is also opened via the link 21. The lower end of the support lever 20 is pulled forward. Therefore, since the door support lever 20 is rotated clockwise about the pivot 19 in FIG. 3, the door 26 is pulled up obliquely upward and rearward, and the front surface of the cooking chamber 2 as shown in FIG. Open the opening.

The door 26 opened as described above is drawn into the upper space 1a between the upper wall of the inner box 3 and the upper wall of the outer box 4 while rotating about the pivot 25 by its own weight. The opening operation of the door 26 is completed when the output shaft 13a of the motor 13 rotates 180 °.
The 180 ° rotation is detected by the microswitch (not shown).

When the motor 13 is further driven from the door open state shown in FIG. 4 to rotate the drive gear 14 by 180 ° in the direction of the arrow, the link 2 is moved through the link operating arm 17.
1 is moved diagonally upward to the rear side, and this link 2
The lower end portion of the door support lever 20 is pushed rearward via the switch 1. Therefore, the door support lever 20 moves the pivot 19
4 is rotated counterclockwise in FIG. 4, the door 26 is pushed obliquely downward to close the front opening of the cooking chamber 2 as shown in FIG.

The cooker main body 1 has a door fully open detection switch 41 (see FIG. 1) for detecting the fully open position of the door 26 opened and closed as described above, and a fully open door for detecting the fully closed position of the door 26. A close detection switch 42 (see FIG. 1) is provided for each. A micro switch or the like is used for these door opening / closing detecting means.

As shown in FIG. 4 by way of example, the motor fixing plate 12 and the fixing plate (not shown) have arms projecting into a side space between the inner box 3 and the side walls 3a, 4a of the outer box 4. A mounting portion 27 is formed. This mounting part 27
The lower end of the mesh interlocking arm 28 is pivotally attached to this. The arm 28 has a first elongated hole 29 and a second elongated hole 30 extending in the lengthwise direction (see FIG. 7). First long hole 29
An interlocking pin 31 protrudingly provided at the lower end of the door support lever 20 is slidably inserted therein. Therefore, the mesh interlocking arm 28 is rotated in the front-rear direction about the lower end pivotal portion as the door support lever 20 is rotated.

An end of a slide shaft 7b on the rear side of the grill 7 is slidably inserted into the second slot 30. Therefore, the grill 7 is horizontally reciprocated in the front-rear direction by interlocking with the opening and closing of the door 26 via the mesh-interlocking arm 28 which is rotated in the front-rear direction as described above.

An operation panel 32 is mounted on the lower front surface of the cooker main body 1, and has a door opening / closing switch 43, a cancel switch 44, and various cooking switches 45 to 50 as shown in FIG. Each is installed. The door opening / closing switch 43 operates the motor 13. The cancel switch 44 is for stopping the cooking operation selected by any of the cooking switches 45 to 50. Cooking switch 45 is for toast, cooking switch 4
6 is for rice cake, cooking switch 47 is for gratin, cooking switch 48 is for pizza, cooking switch 49 is for frying, and cooking switch 50 is for cake. Further, the operation panel 32
Display lamps 51 to 56 as indicators are attached to the cooking switches 45 to 50 at corresponding positions, respectively.
Each of the display lamps 51 to 56 is adapted to be turned on when the corresponding cooking switch is turned on.

Each of the switches 43 to 50 is operated by a push button from the front side of the operation panel 32, and is supported by the printed wiring board 65 shown in FIGS. 3 and 4. A control device 57 including a microcomputer is attached to the board 65.

The controller 57 controls the R as shown in FIG.
OM (read-on-memory) 58 and internal timer 59
It has and. The input port of this controller 57 is
Indicators (display lamps 51-56), door open / close switch 4
3, cancellation switch 44, cooking switches 45 to 50, door fully open detection switch 41, door fully closed detection switch 42,
And the rotation detection means (not shown) are connected to each other. Further, at the output port of the control device 57, an acoustic alarm 60 such as a buzzer, an upper heater control means 61 for controlling energization of the upper electric heater 5, and a lower heater control for controlling energization of the lower electric heater 6. A means 62 and a door motor control means 63 for controlling the energization of the motor 13 are respectively connected. The alarm 60 is used to notify the completion of cooking.

The ROM 58 of the control device 57 has program data forming cooking control means and program data forming door opening / closing control means. The cooking control means is a predetermined toast cooking mode, rice cake cooking mode, gratin cooking mode, pizza cooking mode, frying cooking mode, and cake cooking mode corresponding to the respective cooking switches 45 to 50. Accordingly, the upper and lower heater control means 61, 62 are operated to control the energization of the upper and lower electric heaters 5, 6. This energization control includes energization modes such as energization time (heating and cooking time) and changes in the energization rate.

An upper electric heater 5 is connected in series to the upper heater control means 61, and this series circuit is connected to a commercial AC power source 64. The lower electric heater 6 is connected in series to the lower heater control means 62, and this series circuit is connected in parallel to the series circuit of the upper heater control means 61 and the upper electric heater 5. Upper and lower heater control means 61, 6
Reference numeral 2 includes a switch and its control unit, and the control unit opens and closes the switch in response to a control signal from the cooking control means.

The door opening / closing control means of the RAM 58 opens / closes the door 26 based on the operation of the cancel switch 44 and the door opening / closing mode in which the door 26 is automatically opened / closed based on the operation of the door opening / closing switch 43. , 6 is issued to the door motor control means 63. A motor 13 is connected in series to the door motor control means 63, and this series circuit is connected in parallel to the series circuit of the lower heater control means 62 and the lower electric heater 6. The door motor control unit 63 includes a switch and its control unit, and the control unit opens and closes the switch in response to a control signal from the door opening / closing control unit.

A controller 57 connected to the RAM 58.
The internal timer 59 has a timer for measuring various times when executing each cooking mode and the like, and a door opening time for measuring a door opening time after completion of the cooking mode in executing the door opening / closing mode. It also has a timer which constitutes a measuring means. The time measured by this door opening time measuring means is 40 seconds, but it may be shorter than that.

The program shown in FIG. 2 is started by connecting the oven toaster having the above-mentioned configuration to the commercial AC power source 64. First, in step 1, the controller 57 determines whether or not the door opening / closing switch 43 has been operated. . When the door open / close switch 43 is pressed and the determination in step 1 is established, step 2 is executed by the door open / close control means of the ROM 58 via the door motor control means 63. Then, since the door motor 13 is operated, the door 26 is automatically opened by the above-described door opening operation of the automatic door opening / closing mechanism 11. Next, it is determined in step 3 whether or not the door full open detection switch 41 is turned on. When the door 26 is placed in the fully open position and the door fully open detection switch 41 is turned on, step 4 is executed by the door opening / closing control means of the ROM 58 via the door motor control means 63, whereby the door 26 is fully opened. At the same time, the operation of the automatic door opening / closing mechanism 11 is stopped.

In this state, the user places an object to be cooked such as bread on the grill 7 and then selects and presses one of the cooking switches 45 to 50 corresponding to the type of the object to be cooked. Manipulate. When the cooking switch is turned on in this manner, the determination in step 5 is established, so that the door opening / closing control means of the ROM 58 executes step 6 via the door motor control means 63. Thereby, the door motor 13 is operated, and the door 26 is automatically closed by the above-described door closing operation of the automatic door opening / closing mechanism 11. Next, it is judged in step 7 whether the door fully closed detection switch 42 is turned on. At the same time that the door 26 is arranged at the fully closed position and the door fully closed detection switch 42 is turned on, the door motor control means 63 is controlled by the door opening / closing control means of the ROM 58.
The operation of the automatic door opening / closing mechanism 11 is stopped via. After that, the process proceeds to step 8 where the cooking control means of the ROM 58 starts energizing the upper and lower electric heaters 5 and 6 via the upper and lower heater control means 61 and 62, and the energization depends on the selected cooking switch. It is controlled by the cooking mode.

Next, in step 9, the cancel switch 4
It is determined whether 4 has been operated. If the determination is not successful, the routine proceeds to step 10, where it is determined whether or not cooking has been completed, that is, whether or not the cooking time set in the cooking mode has elapsed. If the determination in step 10 is established, step 11 is executed and the ROM
The upper and lower heater control means 61, 6 by the cooking control means 58.
The power supply to the upper and lower electric heaters 5 and 6 is stopped via 2. At the same time, the controller 57 operates the alarm 60 to notify the user of the completion of cooking.

If the determination is made in step 9 (the cancel switch 44 is turned on), step 11 is executed. In the next step 12, ROM
Door motor control means 6 by the door opening / closing control means 58
Since the door motor 13 is operated via the door 3, the door automatic opening / closing mechanism 11 is opened via the door opening operation described above.
Will be opened automatically.

Therefore, the door 26 is automatically opened without the trouble of operating the door opening / closing switch 43 either after the cooking is completed or when the cancel switch 44 is turned on to stop the cooking. be able to. When the door 26 is fully opened, the user can
Items to be cooked can be put in and taken out.

After that, it is judged in step 13 whether the door fully open detection switch 41 is turned on. At the same time that the door 26 is placed in the fully open position and the door fully open detection switch 41 is turned on, the operation of the automatic door opening / closing mechanism 11 is stopped through the door motor control means 63 under the control of the door opening / closing control means of the ROM 58. To be done. When the door 26 is fully opened, the user can put in and take out the food to be cooked on the grill 7.

Then, step 14 is executed after step 13 is established. In this step 14, ROM
The door opening time measuring means 58 measures the time from the time when the door is fully opened after the cooking switch is turned on. After that, it is judged in step 15 whether the door opening / closing switch 43 is turned on. If the judgment is satisfied, it is judged in step 16 whether the measured time has reached a predetermined time, that is, the door 26. It is determined whether the predetermined open time (40 seconds) has elapsed.

If the determination in step 16 is satisfied, step 17 is executed, so that the door opening / closing control means of the ROM 58 operates the door motor 13 via the door motor control means 63 to automatically operate the door. Opening and closing mechanism 11
The door 26 is automatically closed through the door closing operation described above. Next, it is judged in step 18 whether or not the door fully closed detection switch 42 is turned on, the door 26 is placed at the fully closed position and the door fully closed detection switch 42 is turned on, and at the same time, the door opening / closing control means of the ROM 58. Thus, the operation of the automatic door opening / closing mechanism 11 is stopped via the door motor control means 63.

If the determination in step 15 (whether the door opening / closing switch 42 is on) is established, step 17 is executed without passing through the next step 16, so that the door 26 Will be closed automatically.
The program ends through the above steps.

Therefore, it is possible to prevent forgetting to close the opened door 26 after the completion of cooking,
Does not require any special operation to close. Moreover, since the door 26 is automatically closed after the predetermined time as described above, it is possible to prevent the cooking chamber 2 from being cooled early, which is advantageous when the bread is continuously baked.

The present invention is not limited to the above embodiment. For example, the control device 57 in the invention of claim 1 automatically closes the door 26 through the door automatic opening / closing mechanism 11 based on the operation of the door opening / closing switch 43 after the program executes steps 1 to 13. It may be configured to end.

[0042]

As described in detail above, according to the heating cooker of the first aspect, the door opening / closing switch is turned on to automatically open the door, and then the object to be cooked is put in the cooking chamber, and then the cooking switch is turned on. The door can be automatically opened after cooking without the need to perform the operation to open the door by simply inserting, so that the number of operations required for one cooking can be reduced and the operability can be improved.

Further, according to the heating cooker of the first aspect of the present invention, the door opening / closing switch is turned on to automatically open the door, the object to be cooked is put in the cooking chamber, and then the cooking switch is turned on. Not only can the door be opened automatically after cooking without any special operation to open the door, but after that, the opened door can be closed automatically, so closing the door after cooking is complete You can prevent forgetting,
The number of operations required for one cooking is further reduced, and the operability can be further improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an oven toaster according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the control device for an oven toaster according to the embodiment.

FIG. 3 is a schematic cross-sectional view showing the configuration of the oven toaster according to the embodiment with the door closed.

FIG. 4 is a schematic cross-sectional view showing the structure of the oven toaster according to the embodiment with the door opened.

FIG. 5 is a cross-sectional view showing a configuration of an automatic door opening / closing mechanism of the oven toaster according to the embodiment.

FIG. 6 is a front view showing the configuration of an oven toaster according to the embodiment.

FIG. 7 is a perspective view showing a configuration of a grill operation arm of the oven toaster according to the embodiment.

[Explanation of symbols]

1 ... Cooker main body, 2 ... Cooking room, 5, 6 ... Electric heater, 1
1 ... Automatic door opening / closing mechanism, 13 ... Motor, 26 ... Door, 4
3 ... Door open / close switch, 45-50 ... Cooking switch, 5
7 ... Control device, 61, 62 ... Heater control means, 63 ... Door motor control means

Claims (2)

[Claims] 1. A cooker main body having a cooking chamber having a front opening and an electric heater built therein, a door movably attached to the cooker main body to open and close the front opening of the cooker main body, An automatic door opening / closing mechanism provided in the cooker body for opening and closing the door by using a door motor as a power source, a cooking switch attached to the cooker body, and the door automatic opening / closing mechanism based on the cooking switch being turned on. After closing the door via the electric power supply to the electric heater, after the lapse of the heating and cooking time determined according to the cooking mode of the cooking switch, the power supply to the electric heater is stopped, the door automatic A control device that opens the door via an opening / closing mechanism, and a door opening / closing switch that is attached to the cooker body and operates the door automatic opening / closing means via the control device. Heating cooker equipped and pitch. 2. A cooker main body having a cooking chamber in which a front surface is opened and an electric heater is built in, a door movably attached to the cooker main body to open and close the front opening of the cooker main body, An automatic door opening / closing mechanism provided in the cooker body for opening and closing the door by using a door motor as a power source, a cooking switch attached to the cooker body, and the door automatic opening / closing mechanism based on the cooking switch being turned on. After closing the door via the electric power supply to the electric heater, after the lapse of the heating and cooking time determined according to the cooking mode of the cooking switch, the power supply to the electric heater is stopped, the door automatic A controller for opening the door via the opening / closing mechanism and closing the door via the door automatic opening / closing mechanism after a predetermined time from this point; Vignetting heating cooker equipped a door limit switch for operating the door automatic opening and closing means through the control device.