A dry burning judgment method applied to ptc heating equipment

A technology of heating equipment and dry burning, which is applied in the direction of thermometers, ohmic resistance heating, and ohmic resistance heating parts that are directly sensitive to heat, electric/magnetic elements, etc., which can solve the problems of increasing equipment costs and achieve the effect of reducing costs
CN111006784BActive Publication Date: 2021-07-13GUANGDONG TONZE ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG TONZE ELECTRIC CO LTD
Publication Date
2021-07-13

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Abstract

A dry burning judgment method applied to PTC heating equipment, characterized in that: one end of the PTC heating equipment is connected to a live wire, the other end of the PTC heating equipment is connected to one end of a resistor, and the other end of the resistor is connected to a zero line through a thyristor; The control electrode of the silicon-controlled silicon is connected to the corresponding control signal output terminal of the main control chip, and the connection between the PTC heating device and the resistor is used as the temperature signal detection terminal, and the temperature signal detection terminal is connected to the corresponding signal input terminal of the main control chip; the main control chip Obtain the electrical signal of the temperature signal detection terminal, compare it with the preset threshold value after processing, and judge whether the PTC heating device is in a dry state according to the comparison result; the main control chip sends a signal through the control signal output terminal to control the flow of the thyristor. Off state to control whether the PTC heating equipment is powered on. The invention can accurately judge whether the PTC heating equipment is in a dry burning state, saves special temperature control or temperature measuring devices, and is beneficial to reduce costs.
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Description

technical field

[0001] The invention relates to the technical field of electric heating equipment, in particular to a method for judging dry burning applied to PTC heating equipment. Background technique

[0002] Existing heating equipment generally uses special temperature control or temperature measuring devices (such as thermistors, thermostats, thermocouples, infrared temperature measurement, etc.) to detect the temperature of heated objects (such as containers used to accommodate food materials), By judging whether the temperature has risen abnormally, and then judging whether the heating equipment is in a dry state, and controlling the power supply of the heating equipment to prevent dry burning and accidents. Since special temperature control or temperature measurement devices need to be set, the equipment cost is increased. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a dry-burning judging method appl...

Claims

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