JP2765302B2 - microwave - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven equipped with a shutter.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a conventional shutter control, in which a solenoid is used to drive a shutter, and a cooking menu which is set when a start of cooking is instructed from an operation unit. Accordingly, an ON signal is continuously sent to the shutter drive solenoid control relay.

[0003]

However, in this configuration, there is a risk that cooking cannot be performed in an optimal state of the shutter since it is not possible to confirm whether or not the shutter has operated as actually controlled. Further, in this configuration, when the cooking is not actually performed, the shutter is left in a closed state, so that the shutter sticks due to dirt such as oil generated from the cooked food, and the shutter does not move with the shutter closed. There is also. Also, since the shutter closes due to a momentary blackout during cooking,
There is also a drawback that when cooking should be performed with the shutter open, the finish of the cooking deteriorates.

[0004] Therefore, it is a first object of the present invention to provide a microwave oven which can perform a shutter at a position suitable for cooking in any state, thereby improving the finish of cooking.

It is a second object of the present invention to provide a high-quality microwave oven with reduced shutter failure due to oil stains and the like.

[0006]

In order to achieve the first object, according to the present invention, there is provided a shutter for preventing an external wind from flowing into a heating chamber for heating food, and the shutter. A shutter drive motor that drives the opening and closing of the shutter, a shutter drive motor control relay that controls the shutter drive motor, an operation unit for setting a desired cooking menu and starting cooking, and opening the shutter. A shutter open detection switch for detecting a state,
A microcomputer that controls on / off of the shutter drive motor control relay based on the cooking menu set by the operation unit, wherein the microcomputer opens the shutter for each cooking menu set by the operation unit. because the shutter is stopped at the desired position to the set cooking menu sends an on signal to the shutter driving motor control relay based on the input signal from the detection switch, an oN signal to the shutter driving motor control relay If there is an input from the power supply clock input unit that there is a momentary stoppage of the time during which the shutter drive motor may be reversed while sending It is characterized by.

In order to achieve the second object, the present invention provides a shutter for blocking external air from flowing into a heating chamber for heating food, a shutter driving motor for driving the opening and closing of the shutter, A shutter drive motor control relay for controlling the shutter drive motor, an operation unit for setting a desired cooking menu and starting cooking, a shutter open detection switch for detecting an open state of the shutter, and heating. A door open / close detection switch that detects an open / closed state of a door of the room; and a microcomputer that controls on / off of the shutter drive motor control relay based on a cooking menu set by the operation unit. Is when the door open signal comes in from the door open / close detection switch after the cooking done And performing shutter opening control to the shutter driving motor control relay from.

[0008]

In the microwave oven of the present invention, the shutter can be adjusted to a position suitable for cooking in any state by the above-mentioned structure, and the finish of cooking is improved.

Further, with the above configuration, it is possible to reduce shutter failures due to oil stains and the like.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a microwave oven according to the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a microwave oven according to the present invention, and a microcomputer 8 for controlling the microwave oven.
The microcomputer inputs a cooking menu setting and cooking start instruction information from an operation unit provided on a front operation panel of the main body shown in FIG. 3, that is, a keyboard 1, and outputs information on a shutter open detection switch. Is input, and H is output controlled to the shutter drive motor control relay so as to stop the shutter at a position corresponding to the cooking menu. Also, since the shutter drive motor rotates without direction, power supply clock input
Monitors input from unit 4 and can reverse motor rotation.
Time, clock input is longer than the fixed time t shown in FIG.
If shutter is interrupted for a while, execute motor control for shutter drive
If you are in the middle, start over from the beginning
You. After the cooking is completed, the door open / close detection switch 3
Monitor the signal, and if a door open signal is input,
The shutter opening control is performed. Figure 2 shows
4 shows a timing chart.

[0012]

[0013]

[0014]

[0015]

[0016]

As is evident from the foregoing description, according to the electronic oven according to claim 1, microcomputer, depending on the cooking menu to be performed is performed to stop the cooking at an appropriate position and again appropriate during power outage Do not control to position
As a result , the finish of cooking is extremely good.

Further, in the microwave oven according to claim 2,
Since the shutter is left open when not in use, it is possible to reduce shutter sticking defects due to oil stains and the like.

[Brief description of the drawings]

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

FIG. 2A is a timing chart of a shutter drive motor control relay of a microwave oven according to an embodiment of the present invention, and a timing chart at the time of closing a shutter (in a normal state). Timing chart for control relay and shutter closing operation (when power supply is abnormal)

FIG. 3 is a perspective view of the main body of the microwave oven of the present invention.

FIG. 4 is a block circuit diagram of a conventional microwave oven.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-199789 (JP, A) JP-A-4-73519 (JP, A) Fully open sho 56-3301 (JP, U) Really open sho 63- 123906 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F24C 7/02 350 F24C 7/02 541

Claims (2)

(57) [Claims] A shutter for blocking air from flowing into a heating chamber for heating food; a shutter driving motor for driving the opening and closing of the shutter; and a shutter driving motor for controlling the shutter driving motor. A control relay, an operation unit for setting a desired cooking menu and starting cooking, a shutter open detection switch for detecting an open state of the shutter, and a power clock for notifying that a power clock is operating normally. An input unit, and a microcomputer that controls on / off of the shutter drive motor control relay based on a cooking menu set by the operation unit, wherein the microcomputer sends an ON signal to the shutter drive motor control relay. The shutter drive from the power clock input Microwave oven over data, characterized in that the again interrupts the shutter opening and closing control of the running and when the input that had stopped instantaneous of possible time to re-inverted. 2. A shutter for preventing air from flowing into a heating chamber for heating food, a shutter driving motor for driving the opening and closing of the shutter, and a shutter driving motor for controlling the shutter driving motor. A control relay, an operation unit for setting a desired cooking menu and starting cooking, a shutter open detection switch for detecting an open state of the shutter, and a door open / close detection for detecting an open / closed state of a door of the heating chamber. A switch, and a microcomputer that controls on / off of the shutter drive motor control relay based on a cooking menu set by the operation unit, wherein the microcomputer opens and closes the door after cooking is completed. When the door open signal is received from the detection switch, the shutter drive motor control relay is started. Microwave oven and performs shutter opening control to.