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Microwave oven and its control method

A technology of microwave ovens and power controllers, applied in microwave heating, household stoves, heating fuels, etc., can solve the problems of reduced electromagnetic wave efficiency, reduced circuit stability, and low voltage

Inactive Publication Date: 2007-11-07
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the AC voltage output by the power supply is lower than the allowable low voltage, the high voltage generated by the secondary coil of the high voltage transformer is relatively low
Therefore, the efficiency of the magnetron to generate electromagnetic waves is reduced, and the cooking time is also lengthened
[0006] In addition, in the event that the steady current value passing through the rectification and filtering part exceeds the predetermined allowable current value, it will overload the circuit, which may reduce the stability of the entire circuit

Method used

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  • Microwave oven and its control method
  • Microwave oven and its control method
  • Microwave oven and its control method

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Embodiment Construction

[0027] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0028] With reference to Fig. 1, this is the control block diagram of microwave oven of the present invention. The microwave oven includes: a power supply part 1, which provides alternating current (AC) power; a high-voltage transformer 7, which generates high voltage from the AC power provided by the power supply part 1; and a magnetron 9, which generates electromagnetic waves from the high voltage generated by the high-voltage transformer 7. Described microwave oven also comprises: low-voltage detector part 12, it determines whether the voltage that power supply part 1 supplies is lower than predetermined allowable lower limit voltage; allowable current value.

[0029] The microwave oven is provided with a power controller section 11, which interrupts the power supplied from the power supply section 1 to the magnetron 9 when the voltage of the power supp...

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Abstract

Disclosed is a microwave oven including a magnetron, a power supply part supplying an AC power and a high voltage transformer generating a high voltage with the AC power from the power supply part, comprising a power controller part interrupting the power supply to the magnetron where it is determined that the voltage of the power supplied from the power supply part is lower than a predetermined allowable lower limit voltage. With this configuration, application of the voltage lower than the allowable lower limit voltage can be prevented, and in addition, the stability of the circuit can be enhanced.

Description

technical field [0001] Generally speaking, the present invention relates to a microwave oven and a control method thereof, in particular, to a microwave oven and a control method thereof, which can avoid using at a low voltage lower than the allowable lower limit voltage. Background technique [0002] Generally, microwave ovens work as follows. Alternating current (AC) power supplied from the power supply section is applied to the primary coil of the high voltage transformer, and then high voltage is generated in its secondary coil. The cathode filament installed in the magnetron is heated by the high voltage generated in the secondary coil of the high-voltage transformer, and the magnetron is oscillated by the applied high voltage, thereby radiating extremely high frequency energy. When this extremely high-frequency energy encounters water or water-containing substances (such as grain, etc.) in a closed space, it is converted into heat energy, so this heat energy is used f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C7/02F24C7/08H05B6/64H05B6/66H05B6/68
CPCH05B6/666H05B6/68
Inventor 李性浩曹永元金泰寿
Owner SAMSUNG ELECTRONICS CO LTD