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Over-temperature protection circuit

An over-temperature protection circuit and resistance technology, applied in emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems such as potential safety hazards, temperature rise, threats to people's property and life safety, and achieve Prevent danger, good danger effect

Pending Publication Date: 2021-09-03
广东顺德禾友电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, some high-power household heating appliances, such as PTC heaters, when there are obstacles blocking the air inlet and run for a long time, the internal temperature of the machine will rise sharply, which is likely to cause safety hazards and threaten people's property and life safety.

Method used

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present application clearer, the specific implementation method of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] The technical solutions in the embodiments of the present invention will be fully described below, obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] According to some embodiments, such as figure 1 As shown, the over-temperature protection circuit includes mains input, filter circuit, power supply circuit, main control chip, human-computer interaction module, heating module, and temperature measurement module. Among them, the mains inp...

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PUM

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Abstract

The invention discloses an over-temperature protection circuit. The over-temperature protection circuit is characterized by comprising a heating body, a relay and a first triode, wherein the first triode is connected with a control end of the relay, and a controlled end of the relay is connected with mains supply through the heating body so that the first triode can control the heating body to work through the relay. The over-temperature protection circuit further comprises a thermosensitive element and a main control chip, wherein the thermosensitive element is close to the heating body, and the main control chip detects the temperature through the thermosensitive element, controls a relay switch through the first triode and controls the heating body to work, so that when the temperature exceeds a set value, the main control chip controls the heating body to stop heating, and when the temperature returns to the set value, the main control chip controls the heating body to heat.

Description

technical field [0001] The invention relates to a protection circuit, in particular to an over-temperature protection circuit. Background technique [0002] At present, some high-power household heating appliances, such as PTC heaters, when there are obstacles blocking the air inlet and run for a long time, the internal temperature of the machine will rise sharply, which is likely to cause safety hazards and threaten people's property and life safety. Contents of the invention [0003] In order to solve the problems in the prior art, the present application provides a circuit structure with intelligent detection of product operating temperature. It can detect the ambient temperature inside the heating product in real time. When the internal temperature reaches the risk temperature, the heating circuit of the product will be shut down to stop working, and it can be turned on again when the temperature returns to the normal range. This can better prevent the occurrence of d...

Claims

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Application Information

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IPC IPC(8): H02H5/04H05B1/02
CPCH02H5/04H02H5/042H05B1/0202H05B1/0277
Inventor 熊伟甘建成李昌林李国磊
Owner 广东顺德禾友电子科技有限公司
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