KR200141140Y1 - Control device of illumination for microwave oven - Google Patents

Abstract

The present invention relates to a high light control device for a microwave oven, and in particular, to improve the high light condition of a microwave oven, by removing the oven lamp and the heater heater relay, the AC heater input using the halogen heater applied to the heater using a triac. It relates to a high internal lighting control device for a microwave oven to control the period of the.

Therefore, the present invention provides a fuse (1) connected in series to one side of the AC power supply, a magnetron support agent (2) connected in series to the fuse (1), a primary safety switch (3) connected to the other line of the AC power source, and The low voltage transformer 15 connected to the primary safety switch 3 and the magnetron support test 2, the main PCB 16 connected to the other terminal of the low voltage transformer 15, and the primary safety switch 3 connected to the primary safety switch 3. Fan motor 5, a turntable motor 6 connected in parallel to the fan motor 5, the fan motor 5 and the magnetron support test 2, and are operated under the control of the main PCB 16. The motor drive relay 18, the lower heater 7 connected to the motor drive relay 18, the upper heater 8 connected to the motor drive relay 18, the lower heater 7 and the other line of the AC power source. A heater heater 7a, connected to the upper heater 8 and the main PCB 16, which is connected to and operated under the control of the main PCB 16. The main relay 9, the main relay 9 and the primary safety switch 3, which are connected to the lyak 19, the magnetron support test 2, and operate under the control of the main PCB 16. Connected to the monitor switch 10, the primary safety switch 3 and the high voltage transformer 11 connected to the monitor switch 10, the high voltage capacitor 12 connected to the high voltage transformer 11, and the high voltage capacitor 12. A high voltage diode 13 connected, and a magnetron 14 connected to the high voltage transformer 11 and the high voltage condenser 12.

Description

High light control device for microwave oven

1 is a circuit diagram of an electric circuit of a conventional microwave oven.

2 is a circuit diagram of a high illumination lighting control device for a microwave oven according to the present invention.

3 is a detailed configuration diagram of the main PCB of FIG.

4 is a detailed circuit diagram of the main PCB of FIG.

* Explanation of symbols for main parts of the drawings

1: Hughes 2: Magnetron Thermostat

3: primary safety switch 4: oven lamp

4a: Oven lamp operation relay 5: Fan motor

6: turntable motor 7: heater

7a: heater heater relay 8: heater

8a: Upper heater driving relay 9: Main relay

10: motor switch 11: high voltage transformer

12 high voltage capacitor 13 high voltage diode

14: magnetron 15: low pressure transformer

15a: rectifier circuit 15b: zero crossing circuit

16: main PCB 16a: control unit

17: door detection unit 18: motor drive relay

19: triac 20: key control panel

20a: oven key 20b: grill key

BD: Bridge Diode R1-R9: Resistance

C: condenser

The present invention relates to a high light control device for a microwave oven, and in particular, to improve the high light condition of a microwave oven, by removing the oven lamp and the heater heater relay, the AC heater input using the halogen heater applied to the heater using a triac. It relates to a high internal lighting control device for a microwave oven to control the period of the.

1 is a circuit diagram of an electric circuit of a conventional microwave oven.

As shown in FIG. 1, the electric circuit of a conventional microwave oven is connected to the one side line of the low voltage transformer 15 after connecting the fuse 1 and the magnetron support test 2 in series to one side line of the AC power supply. The oven lamp drive relay 4a is connected in parallel.

In addition, the other line of the AC power source is connected to one terminal of the primary safety switch 3, and then to the other primary side line of the low voltage transformer 15, and one terminal of the oven lamp 4 and the heater heater 7a. One side of the terminal and one side of the upper heater relay (8a) is connected in parallel with each other and connected to the input side of the primary safety switch (3) and then connected to one side of the turntable motor (6) and the fan motor (5) One terminal and one side of the monitor switch 10 are connected in parallel to the primary safety switch (3).

Meanwhile, one terminal of the main relay 9 is connected in series with the terminal of the magnetron support test 2, and the other terminal is connected to the input terminal of the high voltage transformer 11 and the one terminal of the monitor switch 10, respectively. Lose.

In addition, the input one terminal of the main relay 9 is configured in parallel with one side of the lower heater 7 and the upper heater 8, the other side of the heater is connected in series with the respective heater driving relays (7a, 8a). . The oven lamp 4, the fan motor 5 and the turntable motor 6 are connected in parallel and connected to the other terminal of the oven lamp driving relay 4a, respectively.

In addition, the secondary side of the low voltage transformer 15 is connected to the main PCB 16, the inside of the main PCB (16) has a door (DOOR) detector 17. On the secondary side of the high voltage transformer, there are a magnetron 14, a high voltage capacitor 12, and a high voltage diode 13 for generating electromagnetic waves.

The primary safety switch 3 is turned off and the monitor switch 10 is turned on while the microwave oven door is open while the power is applied.

At this time, since the door switch 17 in the main PCB 16 is opened, the control unit 16a in the main PCB 16 turns on only the oven lamp driving relay 4a so that the oven lamp 4 is turned on. Turn off the other relays so that no power is applied.

When the user puts food in the microwave oven and touches the door, the micro switch 10 is first turned off and the other switch is turned on. At this time, the lamp driving relay 4a is turned off.

When the food to be cooked has a range function, the main relay 9 is turned on by the control unit in the main PCB 16 so that power is applied to the primary side of the high-voltage transformer 11 to start the magnetron 14 while driving the lamp. The relay 4a is also turned on to drive the oven lamp 4 so that the user can see the cooking progress, and also the fan motor 5 and the turntable motor 6. In the case of the oven function, since the lamp driving relay 4a is turned off, power is not applied to the oven lamp 4, the fan motor 5, and the turntable motor 6, and the main relay 9 is also turned off. No power is applied to (11).

At this time, the heater heater relay 7a and the heater heater relay 8a are turned on so that the power is applied to the plane heater 7 which is the heater and the halogen heater 8 which is the heater.

In the case of the grill function, the lamp driving relay 4a, the heater heater relay 7a and the main relay 9 are turned off and only the heater heater relay 8a is turned on to operate only the halogen lamp 8 that is the heater. It is supposed to be.

However, the conventional microwave oven has to be installed in a separate open oven lamp so that you can see the open state or the cooking progress state, there was a problem that the internal lighting state is always operated in a constant state.

In order to improve the above problems, the present invention has an object to provide a high-luminance lighting control device for a microwave oven for improving the lighting conditions in the high-temperature by controlling the cycle of the AC power input.

In order to achieve the above object, the present invention provides a fuse connected in series to one line of AC power, a magnetron support test connected in series to the fuse, a primary safety switch connected to the other line of AC power, the primary safety switch and a magnetron standing. A low voltage transformer connected to a post-test, a main PCB connected to the other terminal of the low voltage transformer, a fan motor connected to the primary safety switch, a turntable motor connected in parallel to the fan motor, and connected to the fan motor and the magnetron support test. A motor driving relay operated under the control of the main PCB, a heater connected to the motor driving relay, an upper heater connected to the motor driving relay, connected to the other line of the heater and the AC power source, and operated under the control of the main PCB. A heater heater, a triac connected to the upper heater and the main PCB, and a magnetron support test. A main relay operated under control of the main PCB, a monitor switch connected to the main relay and a primary safety switch, a high voltage transformer connected to the primary safety switch and a monitor switch, a high voltage capacitor connected to the high voltage transformer, and a high voltage capacitor A high voltage diode connected to the magnetron, and a magnetron connected to the high voltage transformer and the high voltage capacitor. Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit diagram of the high-luminance lighting control device for a microwave oven according to the present invention, FIG. 3 is a detailed configuration diagram of the main PCB of FIG. 2, and FIG. 4 is a detailed circuit diagram of the main PCB of FIG.

The high-luminance lighting control device for a microwave oven according to the present invention eliminates the conventional oven lamp 4 and the upper heater relay 8a as shown in FIG. 2, and replaces the triac 19 with the halogen heater as the upper heater ( 8) and the gate of the triac 19 is configured to be controlled by the control unit 16a in the main PCB (16).

The main PCB 16 for improving the high internal lighting condition is a full-wave rectification circuit 15a composed of a bridge diode BD and a capacitor C for rectifying the AC input power as shown in FIGS. 3 and 4. And a zero crossing circuit 15b, resistors R4-R7, and oven keys 20a and grill keys, which are composed of resistors R1-R3 and transistors Q1 to detect the zero point of the AC input power source. The key operation part 20 including 20b, and the door detection part 17 are comprised.

There is a triac controller 19a for driving the triac 19 only during a certain period of the AC power input using the halogen heater 8 that is the upper heater. When the door of the microwave oven is closed, the primary safety switch 3 is on and the monitor switch is off.

When power is applied to the microwave oven, since power is always applied to the primary side of the low voltage transformer 15, the corresponding AC voltage is output to the secondary side. Therefore, a voltage corresponding to 120 Hz of the AC input is output to the full-wave rectifying circuit 15a including the bridge diode BD and the capacitor C on the transformer secondary side.

Therefore, since the transistor Q1 is turned off every 120 Hz period crossing point of the AC input, the zero crossing circuit 15a composed of the resistors R1-R3 and TR (Q1) is input to the controller 16a as much as the corresponding amount.

When the user puts the food to be cooked in the oven of the microwave oven and touches the door, the door detecting unit 17 composed of the resistors R8 and R9 and the switch is turned on and the power is input to the controller 16a so that the door is closed. Get to know

Then, when the user presses the grill key 20b provided in the key control unit 20, the control unit 16a detects this and turns off the motor drive relay 18, the main relay 9, and the heater heater 7a. The triac 19 is driven through the triac controller 19a for the entire period of the AC input.

In addition, when the oven key is input, only the motor driving relay 18 and the main relay 9 are turned off, and the heater heater relay 7a is turned on so that power is applied to the plane heater 7 which is the heater. In the case of the range cooking, the triac controller 19a operates the halogen heater 8, which is an upper heater, only for a certain period of AC input power after turning on the main relay 9 and the motor driving relay 18 in the controller 16a. ) To drive the triac 19 to allow the user to see the cooking progress.

On the other hand, when the oven door is open, the motor relay 18, the main relay 9, and the heater heater relay 7a are turned off, and the heater is heated for another AC power cycle during the range function or the oven and grill functions. The phosphorus halogen heater 8 is controlled by driving the triac 19 through the triac controller 19a.

The present invention constructed and operated as described above can eliminate the oven lamp and the heater heater relay, can not only fully satisfy the existing oven lamp role by using a halogen heater as the upper heater, but also to each function of the microwave oven. Therefore, there is an effect that can change the internal lighting conditions.

Claims (2)

A fuse 1 connected in series to one line of AC power, a magnetron support test 2 connected in series to the fuse 1, a primary safety switch 3 connected to the other line of AC power, and a primary safety switch (3) and the low voltage transformer (15) connected to the magnetron support test (2), the main PCB (16) connected to the other terminal of the low voltage transformer (15), the fan motor (5) connected to the primary safety switch (3) ), A motor driving relay connected to the fan motor 5 in parallel and connected to the fan motor 5 and the magnetron support test 2 and operated under the control of the main PCB 16. 18, the lower heater 7 connected to the motor driving relay 18, the upper heater 8 connected to the motor driving relay 18, the lower heater 7 and the other line of the AC power source and The heater heater 7a operating under the control of the main PCB 16, the triac 19 connected to the upper heater 8 and the main PCB 16, the ma A main relay 9 connected to the magnetron support test 2 and operated under the control of the main PCB 16, and a monitor switch 10 connected to the main relay 9 and the primary safety switch 3; , A high voltage transformer 11 connected to the primary safety switch 3 and a monitor switch 10, a high voltage capacitor 12 connected to the high voltage transformer 11, and a high voltage diode 13 connected to the high voltage capacitor 12. And a magnetron (14) connected to the high voltage transformer (11) and the high pressure condenser (12). 2. The main PCB (16) according to claim 1, wherein the main PCB (16) is rectifying means (15a) for rectifying an AC input, zero crossing means (15b) connected to the rectifying means (15a) for detecting a zero point of the AC power supply, Triac driving means 19a for controlling the driving of the triac 19, control means 16a connected to the zero crossing means 15b and triac driving means 19a, and a key connected to the control means 16a. A high temperature lighting control device for a microwave oven, comprising: an operation means (20) and a door detection means (17) connected to the control means (16a).