JP2000208247A - High frequency heating equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To obtain a high-frequency heating device for eliminating unnecessary power consumption. SOLUTION: A door switch 10 having a knob 10a which can freely move in and out, and a first switch which is rotatably supported on an outer side wall of a heating chamber 2, extends upward, and has a protruding portion which comes into contact with a door 3 is provided.
A rotary lever 8 having a second lever 8c extending downward and having a switch knob abutting portion for extending and retracting a knob 10a of the door switch 10, and a switch knob 10
a when the door 3 is fully opened,
0a is projected, and a concave portion 8e for turning off the door switch 10 is provided, and the power supply of the control circuit is turned off after a predetermined time has elapsed since the door switch 10 was turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device for controlling a power supply of a control circuit having a microcomputer or the like.

[0002]

2. Description of the Related Art FIG. 12 is a longitudinal sectional view of a main part of a conventional high-frequency heating apparatus, and FIG. In the drawing, 1 is a main body, 2 is a heating chamber provided on the main body 1 and has an opening on one side, 3 is a door for opening and closing the opening of the heating chamber 2, and the door 3 is connected to a lower part of the main body 1 by an arm 4. It is pivotally supported and normally urged in a closing direction by a coil spring (not shown) in the main body 1. Reference numeral 5 denotes a handle provided on the upper outer surface of the door 3, and reference numeral 6 denotes a projection provided to face the handle 5 via the door 3. Reference numeral 7 denotes a support table fixed to the outer wall of the heating chamber 2 and having a stopper 7a projecting upward. Reference numeral 8 denotes a rotary lever, which is rotatably supported by the support table 7 by a rotation shaft 9. The rotary lever 8 includes a lever (a) 8b having a protruding portion 8a at a tip extending above the rotary shaft 9, a lever (b) 8c extending downward, the lever (a) 8b, and a lever (b). ) 8c is constituted by a lever (c) 8d extending substantially vertically. Reference numeral 10 denotes a door switch (a) having an upper surface in contact with the tip of the lever (b) 8c, and has a knob 10a which can be freely moved in and out. Reference numeral 11 denotes a latch switch which is disposed in contact with the tip of the rotary lever (c) 8d, and has a knob 11a so as to be retractable. 12 is a lever (a) of the rotary lever 8
8b is a coil spring that biases the door 8b toward the door 3.

FIG. 14 is a circuit diagram of a conventional high-frequency heating apparatus when a door is closed and power is turned on. In the figure, reference numeral 13 denotes a commercial power supply, 14 denotes a current fuse, and 11 denotes a state when the above-described door 3 is opened. A pair of latch switches that are turned off and turned on when closed, 15 is connected to the contact a when the door is opened,
When the door is closed, the auxiliary door switch is connected to the contact b. The auxiliary door switch is used to blow the current fuse 14 when the contact of the latch switch 11 is not welded off when the door is opened. 16 is a lamp for illuminating the inside of the heating chamber 2 during cooking, 17 is a table motor for rotating a turntable (not shown) provided at the bottom of the heating chamber 2, 18 is a relay connected in series to a high frequency generation source 19. , 20 are relays connected in series to the respective heaters 21, and 22 is a relay for turning on / off a load circuit of the commercial power supply 13 based on control of a control circuit described later. Reference numeral 23 denotes a fan motor connected in parallel to the high-frequency generation source 19, reference numeral 10 denotes a door switch (a) which is turned on when the door is opened and turned off when the door is closed, and 24 is a relay connected in parallel to the door switch 10. And the control power supply is turned off based on the control of the control circuit.
N / OFF.

A control circuit 25 includes a microcomputer 26, a power supply circuit 27 for converting an AC voltage of the commercial power supply 13 into a stabilized DC voltage, and a key input for outputting a cooking command to the microcomputer 26 based on an external operation. A detection circuit 28, a door switch detection circuit 29 for detecting the open / closed state of the door, and ON / OFF of the relays 18, 20, 22, 24 according to the control of the microcomputer 26.
And an output circuit 30 that performs the operation.

Next, the operation of the conventional high-frequency heating apparatus configured as described above will be described with reference to FIGS. FIG. 15 shows ON / OFF of the door switch (a) 10 and the relay 24.
FIG. 16 is a flowchart showing the operation of the high-frequency heating device related to the OFF control, and FIG. 16 is a timing chart of the operation.

First, the commercial power supply 13 is turned on (step S1). At this time, since the door 3 is in the closed state (step S
2), both door switch (a) 10 and relay 24 are OFF
It is in a state (step S3). When the door 3 is opened (step S4), the rotating lever 8 rotates about the shaft 9 by the urging force of the spring 12, the lever (c) 8d comes off the latch switch 11, the knob 11a projects, and the pair of latch switches 11 Is turned off, the auxiliary door switch 15 switches from the contact point b to the contact point a to completely disconnect the commercial power supply 13 from the load. At this time, lever (b) 8
is shifted from the door switch (a) 10 and the normally closed door switch (a) 10 is turned on (step S).
5) Connect the commercial power supply 13 and the power supply circuit 27 of the control circuit 25. When the control circuit 25 is activated by this connection,
The door switch detection circuit 29 detects the opening of the door and outputs the information to the microcomputer 26. The microcomputer 26 transmits the information to the relay 24 when the information is input.
Is turned on (step S6), and the timer 26a in the microcomputer 26 has a fixed timer time t1.
(For example, 10 minutes) (step S7) and wait.

Here, when the food is put into the heating chamber 2 and the door 3 is closed (step S8), the projection 6 of the door 3 pushes the projection 8a of the lever (a) 8b, and the rotation lever 8 is pivoted about the shaft 9. , The lever (c) 8d pushes the knob 11a of the latch switch 11, the pair of latch switches 11 is turned on, and the sub door switch 15 is moved from the contact a to the contact b.
Switch to. At the same time, the lever (b) 8c pushes the knob 10a of the door switch (a) 10 to open the door switch (a).
10 is turned off (step S9). On the other hand, when the microcomputer 26 detects the state through the door switch detecting circuit 29, the timer 26a starts counting down the set timer time t1 (step S1).
10). When the timer time t1 has elapsed, the timer time t1 becomes zero, the relay 24 is turned off via the output circuit 30 (step S11), the commercial power supply 13 and the power supply circuit 27 are disconnected, and the power supply is stopped. FIG. 16 shows a timing chart of the above operation.

When a cooking command is input from the key input detection circuit 28 while counting down the timer time t1 (step S12), the counting down of the timer time is stopped, and based on the command, for example, by high frequency heating. If so, the relay 18 and the relay 22 are turned on via the output circuit 30, to supply power to the lamp 16 and the table motor 17, and to apply power to the high-frequency generation source 19 and the fan motor 23 (step S13). Without opening the door 3 during cooking (step S14), when the cooking time of the high-frequency generation source 19 by heating cooking elapses,
The cooking is ended by turning off the relay 18 and the relay 22 (step S15), the relay 24 is immediately turned off, the commercial power supply 13 and the power supply circuit 27 are disconnected, and the power supply is stopped. When the door 3 is opened during cooking (step S14), the cooking standby state is set. When the door 3 is closed again (step S17), cooking is restarted (step S18).

[0009]

In the above-described conventional high-frequency heating apparatus, when the door 3 is opened, the door switch (a) 10 is turned on regardless of the ON / OFF state of the relay 24 and the control circuit is turned on. Since power is constantly applied to the power supply 25, power is constantly consumed, and power consumed during that time is wasted.

[0010] The present invention has been made to solve such a problem, and an object of the present invention is to provide a high-frequency heating device that eliminates unnecessary power consumption.

[0011]

A high frequency heating apparatus according to the present invention is a door switch means which is turned on when a door of a heating chamber is half-opened and turned off when the door is fully opened,
The power of the control circuit is turned off after a predetermined time has passed since the door switch was turned off.
Power switch means for control.

The door switch means includes a door switch having a knob which can be moved in and out, and a first lever which is rotatably supported on an outer side wall of the heating chamber, extends upward, and has a protruding portion which comes into contact with the door. And a rotary lever having a second lever extending downward and having a switch knob abutting portion that causes the knob of the door switch to protrude and retract, wherein the switch knob abutting portion is provided with a switch knob abutting portion. Provided in the middle,
It has a concave portion for projecting the knob when the door is half-open and turning on the door switch, and a pressing portion for pushing the knob off when the door is fully open.

The door switch means includes a door switch having a knob which can be moved in and out, and a first lever which is rotatably supported on an outer side wall of the heating chamber, extends upward, and has a protruding portion which comes into contact with the door. A rotary lever having a second lever extending downward and having a switch knob abutting portion that allows the knob of the door switch to protrude and retract, and a pair of convex portions provided on the switch knob abutting portion. When the door is half open, the knob protrudes between the pair of protrusions, turning on the door switch, and when the door is fully open, the protrusion pushes the knob to turn off the knob.

The door switch means is connected in series and has first and second door switches having knobs which can freely move in and out, and is rotatably supported on the outer side wall of the heating chamber, and extends upward, and the door switch means extends upward. A first lever having a protruding portion that abuts the first lever, a second lever that extends downward and allows a knob of the first door switch to protrude and retract, and extends substantially perpendicular to the first and second levers. A rotary lever having a third lever for moving a knob of the second door switch in and out, and when the door is half-open, the second and third levers are connected to the first and second levers.
And the first and second door switches are turned ON. When the door is fully opened, the second lever is in the position where the knob of the first door switch projects. , The first door switch is turned on, and the third lever is in a position where the knob of the second door switch is pressed, and the second door switch is turned off.
F.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a longitudinal sectional view of a main part of a high-frequency heating apparatus according to a first embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the operation of opening and closing a door, and FIG. 4 is a flowchart of the operation. The same or corresponding parts as in the related art are denoted by the same reference numerals, and description thereof is omitted.

In the figure, reference numeral 8b denotes a first lever, and levers (a) 8b and 8e denote recesses provided at the tip of a second lever (b) 8c. The recess 8e opens and closes the door 3. In this case, the normally closed door switch (a) 10 is turned on. 8q, 8r
Is a pusher for turning off the door switch (a) 10.

Next, the operation of the high-frequency heating apparatus of the first embodiment configured as described above will be described with reference to FIGS. FIG. 4 shows O of the door switch (a) 10 and the relay 24.
5 and 6 are flowcharts showing the operation of the high-frequency heating device related to the N / OFF control, and FIGS. 5 and 6 are timing charts of the operation. First, the commercial power supply 13 is turned on (step S2).
1). At this time, the door 3 is in the closed state (step S2).
2), both door switch (a) 10 and relay 24 are OFF
It is in a state (step S23). When the door 3 in the closed state is slightly opened (semi-open state) (step S24), the rotating lever 8 rotates about the shaft 9, the lever (c) 8d is released from the latch switch 11, and the knob 11a protrudes to release the latch switch. At the same time as 11 turns off, the secondary door switch 1
5 switches from the contact b to the contact a to completely disconnect the commercial power supply 13 from the load. At this time, when the lever (b) 8c moves and the knob 10a comes to the concave portion 8e, the knob 10a protrudes, and the door switch (a) 10 is turned off.
N (step S25), the commercial power supply 13 and the control circuit 25
To the power supply circuit 27. When the control circuit 25 is activated by this connection, the door switch detection circuit 29 detects the opening of the door, and transmits the information to the microcomputer 2.
6 and the microcomputer 26 turns on the relay 24 when the information is input (step S6).
26), the timer 26a sets the timer time t2 (for example, 10
Minutes) (step S27) and waits.

Next, when the door 3 is opened (step S28), the rotating lever 8 rotates again, and the lever (b) 8c presses the knob 10a of the door switch (a) 10 after the concave portion 8e. The door switch (a) 10 is turned off (step S29). On the other hand, the microcomputer 26
When the state is detected through the door switch detection circuit 29, the timer 26a sets the timer time t2 set earlier.
Is started (step S30). When the timer time t2 becomes zero due to this countdown, the relay 24 is turned off via the output circuit 30 (step S31), and the commercial power supply 13 and the power supply circuit 27 are disconnected to stop the power supply.

When the food is put into the heating cabinet 2 and the door 3 is slightly closed while the door 3 is open (Step S).
32), the protrusion 6 of the door 3 is the protrusion 8 of the lever (a) 8b.
When a is pressed and the rotary lever 8 is rotated back around the shaft 9, the knob 10a projects into the recess 8e and the door switch (a) 10 is turned on (step S33). At this time, the timer 26a sets a timer time t1 (for example, 10 minutes) and waits. When the door 3 is fully closed (step S34), the lever (c) 8d pushes the knob 11a of the latch switch 11, and the pair of latch switches 11
Turns ON, and the sub door switch 15 switches from the contact a to the contact b. At the same time, the lever (b) 8c pushes the knob 10a of the door switch (a) 10 and the door switch (a) 1
0 is turned off (step S35). FIG. 5 shows a timing chart of the above operation.

On the other hand, when the microcomputer 26 detects the state through the door switch detection circuit 29, the timer 26a starts counting down the previously set timer time t1 (step S36). When the previously set timer time t1 has elapsed, the timer time t1 becomes zero, and the relay 2 is output via the output circuit 30.
4 is turned off (step S31), the commercial power supply 13 and the power supply circuit 27 are disconnected, and the power supply is stopped.

When a cooking command is input from the key input detection circuit 28 during the timer countdown (step S36), the timer countdown of the timer time t1 is stopped and, based on the command, for example, high-frequency heating is performed. If so, relays 18 and 22 are connected to output circuit 3
0, the lamp 16 and the table motor 17
And power is applied to the high frequency generator 19 and the fan motor 23 (step S37). Then, if the cooking time for heating the high-frequency generation source 19 has elapsed without opening the door 3 during cooking (step S39), the relay 18 and the relay 22 are turned off to end the cooking (step S40), and the relay 24 is immediately turned off. Is turned off (step S41), the commercial power supply 13 and the power supply circuit 27 are disconnected, and the power supply is stopped.

When the door 3 is fully opened during cooking (step S39), the timer 26a sets a timer time t2 (for example, 10 minutes) and waits. Further, the rotating lever 8 is rotated, and the lever (b) 8c is moved to the door switch (a) 1.
0 knob 10a, and the door switch (a) 10 is turned off.
F (step S42). At the same time, a cooking standby state is set (step S43). On the other hand, the microcomputer 2
6. When the state is detected through the door switch detection circuit 29, the timer 26a starts counting down the timer time t3 (step S44). If the previously set timer time t2 has elapsed, the timer time t2
Becomes zero, the relay 24 is turned off via the output circuit (step S45), the commercial power supply 13 and the power supply circuit 27 are disconnected, and the power supply is stopped. When the door 3 is closed again (step S46), cooking is restarted (step S47).

As described above, in the present embodiment, by providing the lever (b) 8c with the concave portion 8e, the door switch (a) 10 is turned off when the door 3 is fully opened. Power can be shut off after elapse,
There is an effect that the power consumption of the control circuit 25 of the present apparatus can be reduced.

Embodiment 2 FIG. In the present embodiment, the shape of the lever (b) 8c of the rotary lever 8 shown in the first embodiment is changed. 6 (a), 6 (b) and 6 (c) are operation explanatory views which also serve as a main part configuration diagram showing Embodiment 2 of the present invention. Note that the same or corresponding parts as in the related art are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, 8f and 8g are levers (b) 8c
Are a pair of projections provided in the first embodiment, and replace the recesses 38 in the first embodiment. FIG. 6A shows a state where the door 3 shown in FIG. 1 of the first embodiment is in a closed state,
The door switch (a) is in an OFF state in a state where the knob 10a of the door switch (a) 10 is pressed by the projection 8f. FIG. 6B shows a state in which the door 3 is in a semi-open state. Since the knob 10a of the door switch (a) 10 is located between the protrusions 8f and 8g, the knob 10a protrudes and the door switch (a) is opened. Is ON. FIG. 6C shows a state in which the door 3 is fully opened, in which the knob 10a of the door switch (a) 10 is pressed by the projection 8g and the door switch (a) is off.

As described above, the same operation as in the first embodiment is performed, and therefore, when the door 3 is fully opened, the door switch (a) 1
0 is turned off. At that time, the power can be cut off after a certain period of time, and the power consumption of the control circuit 25 of the present apparatus can be reduced.

Embodiment 3 FIG. 7 is a longitudinal sectional view of Embodiment 3 of the present invention, FIGS. 8 and 9 are operation explanatory diagrams, and FIG. 10 is a circuit diagram of the high-frequency heating device according to Embodiment 3 when the power is turned on with the door closed. . The same or corresponding parts as in the related art are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 31 denotes a normally closed door switch (b) connected in series with the door switch (a) 10 as the first door switch. Power is supplied from the commercial power supply 13 to the electric circuit 27 only when the door switch (a) 10 and the door switch (b) 31 are simultaneously turned on. 8d is a lever (c) which is a third lever.

Next, the operation of the high-frequency heating apparatus of the present embodiment configured as described above will be described with reference to FIG. FIG.
1 is a door switch (a) 10, a door switch (b) 3
1 is a flowchart showing an operation of the high-frequency heating device relating to ON / OFF control of a relay 24; First, the commercial power supply 13 is turned on (step S51). At this time,
Since the door 3 is in the closed state (step S52), the door switch (a) 10 is OFF and the door switch (b) 31 is OFF.
N, the relay 24 is in the OFF state (step S5).
3). When the door 3 in the closed state is slightly opened (Step S5)
4), the rotating lever 8 rotates about the shaft 9, the lever (c) 8d comes off the latch switch 11, and the knob 11
At the same time that the latch switch 11 is turned off by the protrusion of the switch a, the sub door switch 15 is switched from the contact b to the contact a to completely disconnect the commercial power supply 13 from the load. At this time, the lever (b) 8c is detached from the door switch (a) 10, and the knob 10a protrudes.
10 is turned on, and both the door switches (b) 31 are turned on (step S55), so that the commercial power supply 13 and the power supply circuit 27 of the control circuit 25 are connected. With this connection, when the control circuit 25 is activated, the door switch detection circuit 29 detects the opening of the door and outputs the information to the microcomputer 26. The microcomputer 26 turns on the relay 24 when the information is input. (Step S56), and a certain timer time t2 (for example, 10 minutes)
Is set (step S57) and the process waits.

Next, when the door 3 is opened (step S58), the rotating lever 8 rotates again, and the lever (c) is rotated.
8d pushes the knob 31a of the door switch (b) 31, and the door switch (b) 31 is turned off (step S5).
9). On the other hand, the microcomputer 26
When the detection is performed through the door switch detection circuit 29, the countdown of the timer time t2 set previously is started (step S60). As a result of the countdown, when the timer time t2 becomes zero, the relay 24 is turned off via the output circuit 30 (step S61), and the commercial power supply 13 and the power supply circuit 27 are disconnected to stop power supply.

When the door 3 is in the open state, the food is put in the heating cabinet 2 and the door 3 is closed slightly (step S).
62), the protrusion 6 of the door 3 is the protrusion 8 of the lever (a) 8b.
a, and when the rotating lever 8 is rotated back around the shaft 9, the door switch (b) 31 is turned on (step S).
63). At this time, a fixed timer time t1 (for example, 10
Minutes) and wait. When the door 3 is fully closed (step S64), the lever (c) 8d pushes the knob 11a of the latch switch 11, and the pair of latch switches 1
1 turns ON, and the auxiliary door switch 15 switches from the contact a to the contact b. At the same time, the lever (b) 8c pushes the knob 10a of the door switch (a) 10 and the door switch (a) 1
0 is turned off (step S65).

On the other hand, when the microcomputer 26 detects the state through the door switch detecting circuit 29, it starts counting down the timer time t1 set previously (step S66). When the previously set timer time t1 has elapsed, the timer time t1 becomes zero, the relay 24 is turned off via the output circuit 30 (step S61), the commercial power supply 13 and the power supply circuit 27 are disconnected, and power is supplied. To stop.

When a cooking command is input from the key input detection circuit 28 during the countdown of the timer time t1 (step S67), the countdown of the timer time t1 is stopped, and based on the command, for example,
In the case of high-frequency heating, the relays 18 and 22 are turned on via the output circuit 30 to supply power to the lamp 16 and the table motor 17, and to apply power to the high-frequency generation source 19 and the fan motor 23 (step S6).
8). Then, without opening the door 3 during cooking (step S6
9) When the cooking time of the high-frequency generation source 19 due to the heating cooking has elapsed, the relay 18 and the relay 22 are turned off to end the cooking (step S70), and the relay 24 is immediately turned off (step S71), and the commercial power source is turned off. 13 and the power supply circuit 27 are disconnected to stop the power supply.

When the door 3 is fully opened during cooking (step S69), a fixed timer time t3 is set once, and
stand by. Also, the rotation lever 8 rotates, and the lever (c)
8d pushes the knob 31a of the door switch (b) 31, and the door switch (b) 31 is turned off (step S7).
2). At the same time, a cooking standby state is set (step S7).
3). On the other hand, the microcomputer 26
Upon detection through the door switch detection circuit 29, the countdown of the timer time t3 is started (step S7).
4). When the previously set timer time t3 has elapsed, the timer time t3 becomes zero, the relay 24 is turned off via the output circuit (step S75), and the commercial power supply 1
3 and the power supply circuit 27 are disconnected to stop the power supply.
When the door 3 is closed again (step S76), cooking is restarted (step S77).

As described above, in this embodiment, the means for connecting the door switch (a) 10 and the door switch (b) 31 in series and detecting the open / closed state of the door 3 using the two door switches is provided. By taking this, when the door 3 is opened,
Although the door switch (a) 10 is on, the door switch (b) 31 is off. At this time, the power can be shut off after a certain period of time, and the power consumption of the control circuit 25 of the present apparatus can be reduced. This has the effect.

[0036]

As described above, according to the present invention, the door switch means which is turned on when the door of the heating chamber is half-opened and turned off when the door is fully opened, and the door switch means is turned off. And a control power switch means for turning off the power of the control circuit after a predetermined time has elapsed from the time when the door is opened. Since the power supply circuit is disconnected from the power supply circuit, it is possible to reduce the power consumed by the control means when the door is opened.

The door switch means includes a door switch having a knob which can be moved in and out, and a first lever which is rotatably supported on the outer side wall of the heating chamber, extends upward, and has a protruding portion which comes into contact with the door. And a rotary lever having a second lever extending downward and having a switch knob abutting portion that causes the knob of the door switch to protrude and retract, wherein the switch knob abutting portion is provided with a switch knob abutting portion. Provided in the middle,
When the door is half-opened, the knob is protruded, and a depression for turning on the door switch, and a push portion for pressing the knob to OFF when the door is fully opened, so that when the door is opened, The consumed power of the control means can be reduced.

The door switch means includes a door switch having a knob which can be moved in and out, and a first lever which is rotatably supported on an outer side wall of the heating chamber, extends upward, and has a protruding portion which comes into contact with the door. A rotary lever having a second lever extending downward and having a switch knob abutting portion that allows the knob of the door switch to protrude and retract, and a pair of convex portions provided on the switch knob abutting portion. When the door is half open, the knob protrudes between the pair of projections and turns on the door switch, and when the door is fully open, the projection pushes the knob to turn off the door, so that the door is opened. The power of the control means which is sometimes consumed can be reduced.

Further, the door switch means is connected in series and has first and second door switches having knobs which can freely move in and out, and is rotatably supported on the outer side wall of the heating chamber, extends upward, and extends upward. A first lever having a protruding portion that abuts the first lever, a second lever that extends downward and allows a knob of the first door switch to protrude and retract, and extends substantially perpendicular to the first and second levers. A rotary lever having a third lever for moving a knob of the second door switch in and out, and when the door is half-open, the second and third levers are connected to the first and second levers.
And the first and second door switches are turned ON. When the door is fully opened, the second lever is in the position where the knob of the first door switch projects. , The first door switch is turned on, and the third lever is in a position where the knob of the second door switch is pressed, and the second door switch is turned off.
Since F is set, the power of the control means consumed when the door is opened can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a first embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 4 is a flowchart of an operation of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 5 is a timing chart of the operation of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a configuration and operation of a high-frequency heating device according to a second embodiment of the present invention.

FIG. 7 is a vertical sectional view of a main part of a third embodiment of the present invention.

FIG. 8 is an operation explanatory view of a high-frequency heating device according to a third embodiment of the present invention.

FIG. 9 is an operation explanatory view of a high-frequency heating device according to a third embodiment of the present invention.

FIG. 10 is a circuit diagram of a high-frequency heating device according to a third embodiment of the present invention.

FIG. 11 is a flowchart of an operation of the high-frequency heating device according to the third embodiment of the present invention.

FIG. 12 is a longitudinal sectional view of a main part of a conventional high-frequency heating device.

FIG. 13 is an operation explanatory view of a conventional high-frequency heating device.

FIG. 14 is a circuit diagram of a conventional high-frequency heating device.

FIG. 15 is a flowchart of the operation of the conventional high-frequency heating device.

FIG. 16 is a timing chart of the operation of the conventional high-frequency heating device.

[Explanation of symbols]

1 body, 2 heating rooms, 3 doors, 5 handles, 6
Projection, 8 rotation lever, 8e concave, 8f, 8g convex, 9 axis, 10 door switch (a), 11 latch switch, 13 commercial power supply, 15 auxiliary door switch, 18
Relay, 19 high frequency source, 20 relay, 21 heater, 22 relay, 24 relay, 25 control circuit, 26 microcomputer, 27 power supply circuit, 2
8 Key input circuit, 29 Door switch detection circuit, 30
Output circuit, 31 Door switch (b)

Continued on the front page (72) Inventor Hideki Watanabe 1728-1 Komaeda, Hanazono-cho, Osato-gun, Saitama F-term in Mitsubishi Electric Home Equipment Co., Ltd. (Reference) 3K086 AA08 BB09 CB14 CD19 FA08 3K090 AA02 EB31 3L086 CC01 CC30 DA27

Claims (4)

[Claims] 1. When the door of the heating chamber is half open, it is turned on,
A door switch device that is turned off when the door is fully opened; and a power supply of a control circuit that is turned off after a predetermined time has elapsed since the door switch device was turned off.
And a control power switch means. 2. The door switch means includes a door switch having a knob which can be moved in and out, and a first lever which is rotatably supported on an outer side wall of the heating chamber, extends upward, and has a protruding portion which comes into contact with the door. And a rotary lever having a second lever extending downward and having a switch knob abutting portion for retracting and retracting the knob of the door switch, wherein the switch knob abutting portion is provided with a switch knob abutting portion. An intermediate portion is provided, which has a concave portion for projecting the knob when the door is half-opened and for turning on the door switch, and a pushing portion for pushing the knob off when the door is fully opened. The high-frequency heating device according to claim 1, wherein: 3. The door switch means includes a door switch having a knob which can be moved in and out, and a first lever which is rotatably supported on an outer side wall of the heating chamber, extends upward, and has a protruding portion which comes into contact with the door. A rotary lever having a second lever extending downward and having a switch knob abutting portion for allowing the knob of the door switch to protrude and retract, and a pair of convex portions provided on the switch knob abutting portion. When the door is half-open, the knob protrudes between the pair of protrusions, turning on the door switch, and when the door is fully open, the protrusion pushes the knob to turn off the knob. The high-frequency heating device according to claim 1. 4. The door switch means is connected in series,
First and second door switches each having a knob that can be moved in and out; first levers that are rotatably supported on the outer side wall of the heating chamber, extend upward, and have protrusions that contact the door; A second lever extending and extending a knob of the first door switch; and a third lever extending substantially perpendicular to the first and second levers and extending a knob of the second door switch.
A rotation lever having a lever of the first and second door switches when the door is half-opened, and the knobs of the first and second door switches are in a position where the knobs of the first and second door switches protrude. 2
When the door switch is turned ON and the door is fully open,
The second lever is in a position where the knob of the first door switch projects, and the first door switch is turned ON, and the third lever is in a position where the knob of the second door switch is pressed. 2. The high-frequency heating device according to claim 1, wherein the second door switch is turned off.