JPH05302719A - Heating cooking device - Google Patents

Abstract

PURPOSE:To easily recognize the finishing of heating cooking immediately before the finishing by shortening the flashing period of an illumination light as the elapse time of heating cooking operation approaches the time of completion of the operation. CONSTITUTION:A relay switch 20 is turned on to light an illumination light 4. Then, remaining time until the completion of heating cooking operation is successively calculated by successively subtracting elapse time from set time. Once the remaining time reaches one minute, the relay switch 20 is turned on for 3 seconds and off for 1 second to light the illumination light 4 for 3 seconds and extinguish the same for 1 second for periodical flashing. Once the remaining time reaches 10 seconds, i. e., the operation substantially approaches the completion, the relay switch 20 is turned on for 1 second and off 1 second to light the illumination light 4 for 1 second and extinguish the same for 1 second for periodical flashing. Hereby, a user is informed of the operation substantially approaching completion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker adapted to inform the progress of heating and cooking operation.

[0002]

2. Description of the Related Art In a cooking device such as a microwave oven, the progress of the cooking operation is notified as follows. That is, when the heating and cooking time is set by the time setting switch and then the heating and cooking operation is started by the start switch, the elapsed time is sequentially counted down from the set time and the time value until the end of the operation is sequentially calculated. The calculated time was sequentially displayed on the display.

[0003]

However, in the above case, the display is generally small, and it is difficult to understand the display time unless the display is brought very close, and it is troublesome to grasp the elapsed time of the cooking operation.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to easily know the elapsed time of a heating and cooking operation, and particularly to recognize it when it is about to end. A further object is to provide a heating cooker that can realize this by effectively utilizing an illumination lamp that illuminates the inside of the heating cooking chamber.

[0005]

The cooking device of the present invention comprises:
It is characterized by including an illuminating lamp for illuminating the inside of the heating and cooking chamber and a control means for controlling so that the blinking cycle of the illuminating lamp is shortened as the elapsed time of the cooking operation approaches the end time of the operation.

[0006]

According to the above means, the control means controls so that the blinking cycle of the illumination lamp is shortened as the elapsed time of the cooking operation approaches the end time of the operation. It is possible to know the degree of progress of. In particular, the lighting cycle of the illumination lamp becomes shorter as the operation ends, so that it becomes possible to easily recognize that the end of the operation has come. Furthermore, since the illumination lamp for illuminating the inside of the cooking chamber is blinked instead of separately providing a blinking dedicated lamp, the illumination lamp can be effectively used and the cost can be suppressed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 2, a heating / cooking chamber 2 is formed inside the main body 1 of the microwave oven, and a perforated plate 3 is arranged on a side plate of the heating / cooking chamber 2. An illumination lamp 4 is provided in the.

A front opening of the heating and cooking chamber 2 is opened and closed by a door 5. As is well known, the door 5 is provided with a transparent window portion 5a having a punching metal, a glass plate, etc., so that the inside of the cooking chamber can be seen through from the outside when the door is closed. Therefore, when the illumination lamp 4 is turned on, it is easy to determine the lighting state from the outside.

Further, an operation panel 6 is provided on the front surface of the main body 1, and the operation panel 6 is provided with a display section 7 for displaying time and characters, as well as a menu setting switch and a time setting switch. Further, various switches 8 such as a start switch are provided. In addition,
A turntable 9 is provided at the bottom of the cooking chamber 2.

Next, the electric circuit configuration will be described with reference to FIG. One terminal 10 of the plug 10 connected to the AC power supply
One end of a magnetron drive circuit 16 is connected to a through a fuse 11, a magnetron thermal switch 12, door switches 13 and 14, and a relay switch 15 in sequence, and the other terminal 10b is connected to a magnetron via a relay switch 17. The other end of the circuit 16 is connected.

The magnetron drive circuit 16 has a high voltage transformer, a voltage doubler rectifier circuit, etc.
8 is driven.

A monitor switch 19 is connected between the connection point of the door switches 13 and 14 and the plug-side terminal of the relay switch 17. A series circuit of the relay switch 20 and the illumination lamp 4 is connected between the connection point of the door switch 14 and the relay switch 15 and the connection point of the relay switch 17 and the magnetron drive circuit 18. A fan motor 21 and a turntable driving motor 22 are connected in parallel with the series circuit.

The door switches 13 and 14 are turned on / off in response to opening / closing of the door 5, and the monitor switch 15 is turned on / off in response to opening / closing of the door 5. There is.

Each of the relay switches 15, 17 and 2
0 is controlled to be opened and closed by the control circuit 21. The control circuit 21 includes a DC constant voltage circuit, an A / D converter and a microcomputer, and the microcomputer functions as a control means.

The control contents of the control means of the microcomputer will be described with reference to FIG. Now, when the door 5 is closed, the heating and cooking time is set by the time setting switch, and the start switch is operated, the control shown in FIG. 1 is started.

First, the relay switches 15 and 17 are turned on to drive the magnetron 18 (step S1), thereby starting the heating and cooking operation. And the relay switch 20
Is turned on to turn on the illumination lamp 4 (step S2).

Next, the elapsed time is sequentially subtracted from the set time, and the remaining time until the end of the cooking operation is sequentially calculated (step S3). After that, the remaining time is displayed on the display 7 (step S4).

When the remaining time reaches a predetermined time, for example, "1 minute" (determined in step S5), the relay switch 20
Is turned on for 3 seconds and turned off for 1 second, and the illumination lamp 4 is turned on and off for 3 seconds and turned off for 1 second (step S
6).

When the remaining time is "10 seconds", in other words, when the operation is about to end (determined in step S7), the relay switch 20 is turned on for 1 second and turned off for 1 second.
The illuminating lamp 4 is made to blink in a cycle of lighting for 1 second and extinguishing for 1 second (step S8).

After that, when the remaining time reaches "0 seconds", that is, the operation end time limit (determined in step S9), the relay switch 15 is turned off to stop the driving of the magnetron 18 (step S10), and at the same time, the relay switch is turned on. 17 and 20 are turned off to turn off the illumination lamp 4 (step S1
1), the cooking operation is finished.

According to the present embodiment as described above, the illumination lamp 4 is operated as the elapsed time of the cooking operation approaches the end time of the operation.
Since the control is performed such that the blinking cycle of is shortened, the progress of the heating and cooking operation time can be known from the blinking cycle of the illumination lamp 4. In particular, since the lighting cycle of the illumination lamp 4 becomes shorter as the operation ends, it is possible to easily recognize that the end of the operation has come. Furthermore, since the illumination lamp 4 that illuminates the inside of the cooking chamber 2 is blinked instead of separately providing a blinking dedicated lamp, the illumination lamp 4 can be effectively used and the cost can be suppressed.

In the above embodiment, the blinking cycle of the illumination lamp 4 is changed in two steps, but it may be changed linearly with the passage of time. Other,
The present invention is not limited to the above embodiments, and can be implemented with various modifications without departing from the scope of the invention.

[0023]

As is apparent from the above description, the present invention makes it possible to shorten the blinking cycle of the illumination lamp for illuminating the inside of the cooking chamber and the blinking cycle of the illumination lamp as the elapsed time of the cooking operation approaches the end time of the operation. It is characterized in that it is provided with a control means for controlling to, so that the elapsed time of the heating and cooking operation can be easily discriminated, and in particular, when it is just before the end, this can be easily recognized. Furthermore, there is an excellent effect that this can be realized by effectively utilizing the illumination lamp that illuminates the inside of the cooking chamber.

[Brief description of drawings]

FIG. 1 is a flowchart showing an embodiment of the present invention.

FIG. 2 is a perspective view of a microwave oven.

[Fig. 3] Electric circuit diagram

[Explanation of symbols]

2 is a cooking chamber, 4 is an illumination lamp, 18 is a magnetron, 2
Reference numeral 1 denotes a control circuit (control means).

Claims (1)

[Claims] 1. An illumination lamp for illuminating the inside of the cooking chamber, and control means for controlling the blinking cycle of the illumination lamp to be shortened as the elapsed time of the cooking operation approaches the end time of the operation. And cooker.