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Microwave oven, safety protection circuit and safety protection control method thereof

A safety protection circuit and safety protection technology, applied in emergency protection circuit devices, microwave heating, electrical components, etc., can solve problems such as hidden safety hazards and scorched food, achieve safe and reliable use, prevent food from scorching, and achieve safety protection effect of function

Active Publication Date: 2014-10-15
GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the contacts of the relay fuse and stick together, the relay is no longer controlled by the internal circuit and can no longer be disconnected, so that the heating device will continue to heat, which will not only burn the food, but also have certain safety hazards

Method used

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  • Microwave oven, safety protection circuit and safety protection control method thereof
  • Microwave oven, safety protection circuit and safety protection control method thereof
  • Microwave oven, safety protection circuit and safety protection control method thereof

Examples

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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PUM

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Abstract

The invention discloses a safety protection circuit of a microwave oven. The safety protection circuit comprises a current detector used for detecting a working current of a heating device of the microwave oven, a first switch unit used for controlling an AC (Alternating Current) mains supply to be input to the heating device and connected between the AC mains supply and the heating device, a safety protection switch unit connected between the AC mains supply and the heating device, and a controller connected with the current detector, the first switch unit and the safety protection switch unit, wherein after the controller controls the first switch unit to be switched off, and if the current detector detects that the working current is greater than a preset value, the controller controls the safety protection switch unit to cut off the AC mains supply input to the heating device. The safety protection circuit can cut off the power source of the heating device when contact fusion of a relay in the first switch unit occurs, so that safety hazard caused by continuous heating of the heating device is prevented. The invention also discloses a microwave oven and a safety protection control method of the microwave oven.

Description

technical field [0001] The invention relates to the technical field of cooking and heating appliances, in particular to a safety protection circuit for a microwave oven, a microwave oven with the safety protection circuit and a safety protection control method for the microwave oven. Background technique [0002] During the heating process of the microwave oven, the temperature of the food in the oven cavity will rise rapidly, so the temperature of other parts of the microwave oven will also rise accordingly. Once an abnormality occurs and the heating cannot be stopped, the temperature of the microwave oven body will continue to rise and cause a safety hazard. [0003] In the existing electronic microwave oven, the switch for internally controlling the opening of the heating device is generally a relay. The internal circuit controls the opening and closing of the heating device by controlling the on and off of the relay. However, if the contacts of the relay fuse and stick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/00H05B6/68
Inventor 左远洋周小金
Owner GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD
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