KR100953971B1 - A power control method of microwave oven - Google Patents

Abstract

The present invention relates to a heating energy control method of a microwave oven for adjusting heating energy output in a microwave oven. According to the present invention, by controlling the current value applied to the high voltage transformer and the vent motor, the microwave and the vent motor are controlled to be driven in the refrigerator within the range of the maximum input current value. As described above, the present invention can be realized by adjusting the current value applied in the circuit so that the internal heating energy is high. As a result, the cooking time can be shortened, and the cooking result can be expected to be improved.

Microwave oven, input current value, relay, high voltage transformer, vent motor

Description

A heating control method of microwave oven {A power control method of microwave oven}

1 is a state diagram showing a heating energy control process of the microwave oven according to the prior art.

2 is a control circuit for controlling a current value applied to the microwave oven according to the present invention.

Figure 3 is a first embodiment showing a heating energy control process of the microwave oven according to the present invention.

Figure 4 is a second embodiment showing a heating energy control process of the microwave oven according to the present invention.

            Explanation of symbols on the main parts of the drawings

10: power input terminal 20: first relay

30: second relay 40: high voltage transformer

50: magnetron D1: diode

The present invention relates to a microwave oven, and more particularly, to a heating energy control method of a microwave oven for controlling the output of the heating energy by adjusting the range of the current value applied in the circuit.

A typical microwave oven is a device that generates microwaves by applying an electric current, induces microwaves into a cavity that is a heating space, and heats food by irradiating a heating object. These microwave ovens have various functions due to the diversification of the required heating characteristics, and are equipped with a heater to heat food at a higher temperature.

And the microwave oven is a multi-function microwave oven to cook food using only the high-frequency oscillation from the magnetron and a multi-function cooking and oven cooking in addition to the cooking by the high frequency by installing a heater or a convection pan in the cooking chamber It is divided into a microwave oven.

Such a microwave oven is divided into a tabletop microwave oven (general microwave oven) and a microwave oven (Over The Range: OTR), which are easily configured to be easily moved to any place.

The combined microwave oven saves kitchen space and allows housewives to simply cook or melt food in the microwave and cook them continuously in an electric or gas oven, so that they can cook comfortably without bending their backs. According to the average height of the general public, the gas oven range is installed on the top of the countertop of the kitchen where the gas oven is installed, or it is installed on the upper side of the countertop so that housewives can cook conveniently.

The hood-use microwave oven is installed above a cooking appliance such as an electric or gas oven range, and has a hood function for discharging smoke and odor generated when cooking food by the electric or gas oven range to the outside. At this time, if the smoke, odor and steam generated during cooking rises with the heat, it is sucked into the exhaust path formed inside the microwave oven, and discharged to the outside.

Hereinafter, the microwave oven according to the related art and the present invention is a microwave oven (hereinafter, referred to as a "microwave oven"), and a heating energy control method of the microwave oven according to the prior art will be described.

1 is a state diagram showing a heating energy control process of a microwave oven according to the prior art.

Conventionally, due to the input current regulation value of the microwave oven with a hood, the maximum power applied to the microwave oven should be within 1000W. Therefore, in the related art, high voltage transformers and vent motors are driven within the maximum output power of 1000W.

That is, as shown in the figure, about 15A is applied to the high voltage transformer, and about 1.5A is applied to the vent motor. At this time, the current value applied to the high voltage transformer and the vent motor is a maximum current value that is collectively applied according to the set value, and is a limited value.

And although not shown, if you want to use the top lamp, it takes about 1.5A for the top lamp to be turned on.                         

Therefore, in the related art, the maximum output power is limited to 1000W due to the input current regulation value, and there is a limit to the realization of the high power of the cooking speed and the heating energy output in the high power.

Accordingly, an object of the present invention is to provide a heating energy control method of a microwave oven that controls an output of heating energy by adjusting an input current value applied in a circuit.

In the heating energy control method of the microwave oven according to the present invention for achieving the above object, the first relay and the second relay is configured in parallel in the power supply terminal is connected to the primary end of the transformer, the magnetron and the load in the secondary end of the transformer A microwave oven comprising: a current value setting step of setting a current value applied in a circuit according to a use mode within a maximum allowable current value; An input current control step of controlling a driving time of the first relay and the second relay according to the use mode to control a corresponding current value applied in the circuit; And a driving control step of controlling the driving of the magnetron and the load by the power applied in the circuit, and when the magnetron is driven together with the load, only the first relay is driven to allow the current value applied to the first stage of the transformer in the circuit. It characterized in that to adjust the below the maximum allowable current value.

Looking in detail with respect to the heating energy control method of the microwave oven according to the present invention.

2 is a control circuit for controlling a current value applied to the microwave oven according to the present invention.

As shown in the figure, in the present invention, the first relay 20 is provided at the power input terminal 10. The other side of the power input terminal 10 is input to the third terminal of the high voltage transformer 40. Meanwhile, the first relay 20 is connected in parallel with the second relay 30, and the switch SW is connected in parallel between the first relay 20 and the second relay 30. The second relay 30 is connected to terminals 1 and 2 of the high voltage transformer 40. The fourth terminal of the first coil 40a configured at the second end of the high voltage transformer 40 is connected to one side of the magnetron 50. And the sixth terminal of the second coil 40b configured in the second stage of the high voltage transformer 40 is connected to the high voltage capacitor (C). The resistor R is connected to both ends of the high voltage capacitor C. And the other side of the high voltage capacitor (C) is connected to the magnetron (50). The other side of the magnetron 50 is grounded.

Terminal 5 of the first coil 40a configured at the second end of the high voltage transformer 40 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is grounded. And terminal 7 of the second coil 40b configured to block the second high voltage transformer 40 is grounded.

At this time, the on / off switching operation of the first relay 20 and the second relay 30 is performed through the control of a microcontroller (not shown).

Hereinafter, an operation process of the control device configured in the circuit will be described.

The present invention includes a first relay 20 and a second relay 30 at the first end of the high-voltage transformer 40, the externally applied power supply by the operation of the first relay 20 and the second relay 30. Adjust the current limit until delivery to the high-voltage transformer (40). That is, the minimum current value is applied to the first end of the high voltage transformer 40 by the operation of the first relay 20, and the first relay (at the first end of the high voltage transformer 40 by the operation of the second relay 30). Adjust to apply a current value that is relatively larger than the current value applied by the operation of 20).

In this way, the power applied through the first stage of the high voltage transformer 40 is reduced in pressure through the second stage of the high voltage transformer 40 and is transmitted to the magnetron 50 and the load connected to the second stage of the high voltage transformer 40. As a result, the magnetron 50 and the load and the like are driven.

3 is a first embodiment showing a heating energy control process of the microwave oven according to the present invention.

As shown in the figure, the power supply in the circuit shown in FIG. 2 is applied to operate the first relay 20. At this time, as only the first relay 20 is operated, the current value applied to the high voltage transformer 40 is 15A. However, when the power in the circuit is applied and the first relay 20 and the second relay 30 are operated simultaneously, the current value applied to the high voltage transformer 40 is 17A.

On the other hand, when the second relay 30 is in the driving off state, the vent motor (not shown) is driven. At this time, the allowable current value of the vent motor (not shown) is 1.5A.                     

The reason why the second relay 30 and the vent motor (not shown) are not driven at the same time as described above is the allowable current value applied to the high voltage transformer 40. When the vent motor (not shown) is driven while the second relay 30 is driven at the same time, since the current value 17A allowed for the product is exceeded, it cannot be driven at the same time. Therefore, when the vent motor (not shown) is to be driven, only the first relay 20 is operated to drive within the allowable current value.

That is, in the case of simply performing microwave cooking, the first relay 20 operates. At the same time, the second relay 30 is also turned off after operating for a predetermined time (about 1 minute in the embodiment of the present invention). After that, only the first relay 20 operates to apply a corresponding allowable current (about 15 A) to the high voltage transformer 40. When the second relay 30 is in an off state, a vent motor (not shown) is driven. At this time, in order to drive the vent motor (not shown), the allowable current value is 1.5A.

Meanwhile, after the first relay 20 and the second relay 30 operate for the first minute, a vent motor (not shown) is driven to discharge gas and heat generated during cooking to the outside. At the same time, the second relay 30 is turned off to lower the allowable current value applied to the high voltage transformer 40. When the driving of the vent motor (not shown) is turned off within one minute, the second relay 30 is driven until one minute has elapsed in the initial power-up state as shown.

When one minute has elapsed since the second relay was operated in the initial state, the operation of the second relay 30 is turned off and only the first relay 20 operates. Accordingly, the current value applied to the high voltage transformer 40 is relatively lower than in the initial operation, so that the vent motor can be driven together without exceeding the allowable current value 17A.

4 is a second embodiment showing a heating energy control process of the microwave oven according to the present invention.

As shown in the figure, the power supply in the circuit shown in FIG. 2 is applied to operate the first relay 20. At this time, as only the first relay 20 is operated, a current value applied to the high voltage transformer 40 is about 15A. On the other hand, when the first relay 20 and the second relay 30 are simultaneously driven, the current value applied to the high voltage transformer 40 is about 17A. In this way, the power supply in the circuit is applied, and the allowable input current value applied to the high voltage transformer 40 varies according to the operation time of the first relay 20 and the second relay 30.

As shown in FIG. 4, when the first relay 20 is driven, a current of about 15 A is applied to the high voltage transformer 40. The vent motor (not shown) is driven at the same time as the driving of the first relay 20, so that a current of 1.5 A is further required. As a result, the total input current limit in the circuit is less than 17A, enabling stable driving.

As such, when the first relay 20 and the vent motor (not shown) are simultaneously driven, driving of the second relay 30 is turned off to be applied to the first stage of the high voltage transformer 40. Lower the input current below the total limit (about 17A).

On the other hand, when the driving of the vent motor (not shown) is in an off state, the first relay 20 and the second relay 30 are driven simultaneously. As a result, the first relay 20 and the second relay 30 are driven by the heating means such as the magnetron 50 to be supplied with the power supplied by driving only the first relay 20 to supply the heating energy in the refrigerator. When the heating means such as the magnetron 50 is driven with the power applied and driven together, it is possible to supply relatively larger heating energy to the interior of the refrigerator.

Therefore, the operation time of the first relay 20 and the second relay 30 is controlled to variably control the current value applied in the circuit, thereby obtaining the effect of high output of heating energy in the refrigerator.

As described above, in the present invention, it is a basic technical idea to control a current value applied in a circuit, and to control the heating energy output in the refrigerator by using the same.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

Therefore, the heating energy control method of the microwave oven according to the present invention can adjust the current value applied in the circuit. As a result, the present invention can selectively control the high heating energy in the high power. As a result, the cooking time can be shortened, and the cooking result can be expected to be improved.

Claims (1)

In a microwave oven in which a first relay and a second relay are configured in parallel at a power supply terminal, and are connected to a primary end of a transformer, and a magnetron and a load are configured at a secondary end of the transformer, A setting step of setting an allowable current limit applied to the first end of the transformer; When power is applied to the microwave oven, one of the first relay and the second relay is always driven, and the other relay and the load are driven only at different times to be applied to the first stage of the transformer. A control step of controlling the current value to be always below the allowable current limit value; And And a heating energy output step of varying and outputting heating energy into the microwave oven according to the control step.

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