KR20000009796A - Microwave oven having many high voltage transformers - Google Patents

Abstract

PURPOSE: A microwave oven has many high voltage transformers, and simplifies a circuit structure. CONSTITUTION: A microwave oven includes a power unit(1), a party power line, many parallel lines in parallel connected to the party power line, and many high voltage transformers(10,20) mounted to the parallel line. A party safety fuse(11) and a party safety switch(12) are mounted in the party power line. The party safety fuse and the party safety switch are connected in series to each other. Thereby, a circuit structure is simplified, and the assembling work becomes easier.

Description

Microwave oven with plural high voltage transformer

The present invention relates to a microwave oven having a plurality of high voltage transformer, and more particularly, to a microwave oven in which a circuit is simplified.

A microwave oven is a cooking appliance that irradiates microwaves generated from a magnetron into a cooking chamber and dielectrically heats food in the cooking chamber to cook. A cooking chamber and a parts chamber are formed in a main body. In front of the cooking chamber, a door for rotating and opening the cooking chamber opening is attached, and in front of the component chamber, an operation panel having a plurality of operation buttons for operating the operation of the microwave is attached.

Here, the component chamber is provided with a magnetron for generating microwaves, a high voltage transformer for generating a high voltage required to induce microwave generation, and the present microwave oven includes a plurality of magnetrons and a plurality of high voltage transformers corresponding thereto. Microwave oven that can change the amount of generation.

2 is a circuit diagram of a microwave oven having a pair of high voltage transformers driving a pair of magnetrons, respectively. The first high voltage transformer 60 is connected in series to the first common power line 52 and the second common power line 53 connected to the power supply unit 51, and the first safety line is connected to the first common power line 52. The fuse 61 and the first safety switch 62 are connected in series. In addition, a main relay 75 and a first power relay 63 for controlling power supplied to the first high voltage transformer 60 when the main relay 75 is turned on are serially connected to the second common power supply line 53. It is connected.

Meanwhile, the first parallel line 52a branched between the power supply unit of the first common power line 52 and the first safety fuse 61, and the main relay 75 and the second relay power line 53. A second high voltage transformer 70 is connected in series to the second parallel line 53a branched between the one power relay 63. The second safety fuse 71 and the second safety switch 72 are connected in series to the first parallel line 52a, and the second high voltage transformer (T2) when the main relay 75 is turned on in the second parallel line 53a. A second power relay 73 for interrupting the power supplied to 70 is connected in series.

Here, the main relay 75 and the first and second power relays 63 and 73 are controlled by the control unit 80 that receives a signal by a user's operation, and the control unit 80 controls an operation signal from the outside. When is input, the main relay 75 is turned on, and the first power relay 63 or the second power relay 73 is selectively turned on, or the first power relay 63 and the second power relay 73 are turned on. It turns on at the same time. Accordingly, the first and second high voltage transformers 60 and 70 are selectively or simultaneously operated.

On the other hand, when power is supplied to each of the common power lines 52 and 53 and the parallel lines 52a and 53a by turning on the main relay 75 and the first and second power relays 63 and 73, The current passing through the first safety fuse 61 and the first safety switch 62 flows into the first high voltage transformer 60 and the current passing through the second safety fuse 71 and the second safety switch 72 is Inflow to the second high pressure transformer (70). At this time, when excessive current flows through the first common power supply line 52 and the first parallel line 52a, the first safety fuse 61 and the second safety fuse 71 are short-circuited to form the first high voltage transformer 60. ) And the power supplied to the second high voltage transformer 70 are cut off. On the other hand, if the door of the cooking chamber is opened during the operation of each high-voltage transformer (60, 70), each safety switch (62, 72) is cut off, the power supply to each high-voltage transformer (60, 70) is stopped.

However, since the conventional microwave oven having a plurality of high voltage transformers has to install a separate safety fuse (53, 63) and a separate safety switch (55, 65) for each high voltage transformer (57, 67), the circuit There is a problem in that the assembly workability is poor and the number of parts is relatively large, which increases the manufacturing cost.

Accordingly, it is an object of the present invention to provide a microwave oven having a plurality of high voltage transformers which can simplify assembly and improve assembly workability, reduce the number of parts, and reduce the cost.

1 is a circuit diagram according to the invention,

2 is a circuit diagram illustrating two conventional high voltage transformers, two fuses, and two safety switches.

* Explanation of symbols for the main parts of the drawings

1: power supply unit 2: first common power line

3: second common power supply line 5: main relay

10: first high voltage transformer 11: common safety fuse

12: common safety switch 13: the first power relay

20: second high voltage transformer 23: second power relay

30: control unit

The object is, according to the present invention, an electron having a power supply unit and a common power line from the power supply unit, a plurality of parallel lines connected in parallel with the common power line, and a plurality of high voltage transformers installed in each parallel line A microwave oven is achieved by a microwave oven characterized in that a common safety fuse and a common safety switch are installed in the common power line.

Here, the common safety fuse and the common safety switch is preferably connected in series.

Hereinafter, with reference to the accompanying drawings will be described in detail according to the present invention.

1 is a circuit diagram having two high voltage transformers according to the present invention. As shown in the drawing, a first high voltage transformer is connected to a first common power line 2 and a second common power line 3 connected to a power supply 1. 60 is connected in series, and the common safety fuse 11 and the common safety switch 12 are connected in series to the first common power line 2. In addition, a main relay 25 and a first power relay 13 for controlling power supplied to the first high voltage transformer 10 when the main relay 25 is turned on are serially connected to the second common power supply line 3. It is connected.

Meanwhile, the first parallel line 2a branched between the common safety switch 12 of the first common power line 2 and the first high voltage transformer 10, and the main relay of the second common power line 3, A second high voltage transformer 20 is connected in series to the second parallel line 3a branched between the first and second power relays 25 and 25. In addition, a second power relay 23 is connected to the second parallel line 3a to control power flowing into the second high voltage transformer 20.

Here, the common safety fuse 11 cuts off the power supplied to the first and second high voltage transformers 10 and 20 when an overvoltage flows in the first common power line 2, and the common safety switch 12. When the door is opened during cooking, it is short-circuited to cut off the power supplied to the first and second high voltage transformers 10 and 20.

The main relay 25 and the first and second power relays 13 and 23 of the microwave oven are controlled by the control unit 30 which receives a signal by a user's operation. When the operation of the high voltage transformer 10 is selected, the main relay 25 and the first power relay 13 are turned on, and the power from the power supply unit 1 is connected to the common safety fuse 11 and the common safety switch 12. ) And flows to the first high pressure transformer (10).

When the operation of the second high voltage transformer 20 is selected, the main relay 25 and the second power relay 23 are turned on, and the power from the power supply unit 1 is joint safety fuse 11 and joint safety. The switch 12 flows to the second high voltage transformer 20.

In addition, when the operation of the first and second high voltage transformers 10 and 20 is selected, the main relay 25 and the first and second power relays 13 and 23 are turned on, and the power source is a common safety fuse ( 11) and the common safety switch 12 to flow to the first and second high voltage transformer (10, 20).

Accordingly, the first high voltage transformer 10 and the second high voltage transformer 20 operate separately, or the first high voltage transformer 10 and the second high voltage transformer 20 operate simultaneously or are applied from the power supply unit 1. The supplied power is always introduced into the first and / or second high voltage transformers 10 and 20 through the common safety fuse 11 and the common safety switch 12. Therefore, the common safety fuse 11 and the common safety switch 12 have an appropriate capacity corresponding to the voltage drop flowing into the first high voltage transformer 10 and the second high voltage transformer 20 from the power supply 1. It must be formed.

By this configuration, the common safety fuse 11 and the common safety switch 12 are installed on the first common power line 2 so that the voltage from the power supply flows, and the common safety fuse 11 and the common safety fuse 11 are installed. By configuring the circuit so that the current passing through the switch 12 flows into the first high voltage transformer 10 and the second high voltage transformer 20, a plurality of safety fuses corresponding to the respective high voltage transformers, It is not necessary to provide a safety switch. Therefore, by using the common safety fuse 11 and the common safety switch 12, the circuit can be simplified and the number of parts can be reduced to reduce the cost, and the assembly work is simplified.

As described above, according to the present invention, the circuit can be simplified, the number of parts can be reduced, the cost can be reduced, and the assembly work is simplified.

Claims (2)

In a microwave oven having a power supply unit and a common power line from the power supply unit, a plurality of parallel lines connected in parallel with the common power line, and a plurality of high-voltage transformer installed in each parallel line, Microwave oven characterized in that the joint safety fuse and the joint safety switch is installed in the common power line. The method of claim 1, And the common safety fuse and the common safety switch are connected in series.