Pulse ignition circuit based on Buck principle and gas wall-hanging furnace

A pulse ignition and circuit technology, applied in the direction of using spark ignition, combustion ignition, combustion method, etc., to achieve the effect of small size, cost saving and safety improvement of inductance selection and rectification circuit

Active Publication Date: 2019-05-21
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention proposes a gas-fired wall-hung boiler with a pulse ignition circuit based on the Buck principle to solve the defect in the prior art ignition and detection circuit that ordinary detection ports cannot be used for flame detection

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  • Pulse ignition circuit based on Buck principle and gas wall-hanging furnace
  • Pulse ignition circuit based on Buck principle and gas wall-hanging furnace

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The invention discloses a pulse ignition circuit and a gas wall-hung boiler based on a Buck principle, see figure 2 , including an ignition module, a flame detection module and a controller, the flame detection module includes a pulse and a fire detection unit and a signal conversion module connected in sequence with the output end of the ignition module, and the signal conversion module is used to convert the pulse and fire detection The analog signal output b...

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Abstract

The invention discloses a pulse ignition circuit based on Buck principle and a gas wall-hanging furnace. The pulse ignition circuit comprises an ignition module, a flame detection module and a controller, wherein the flame detection module comprises a pulse and fire detection unit and a signal conversion module which are connected with the output end of the ignition module in sequence, and the signal conversion module is used for converting an analog signal output by the pulse and fire detection unit. A comparator is adopted to output a flame parameter signal, the I/U port connected with a flame detection signal is changed from an analog (AD) detection port to a normal detection port, and the detection signal is more accurate. Only high and low levels are arranged at a chip detection portreceiving the flame detection signal. As only the high and low levels are arranged at a flame detection end, the difficulty of hardware design and software programming is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of pulse ignition circuits, in particular to a pulse ignition circuit and a gas wall-hung boiler based on the Buck principle. Background technique [0002] The fire detection in the traditional pulse ignition circuit is based on the square wave generated by PWM2, which continuously charges the capacitor C4 forward and reverse, and detects whether there is a flame based on the potential difference between forward and reverse charging. But whether there is a flame or no flame, when charging forward, the voltage on the capacitor C4 rises, and when charging reversely, the voltage on the capacitor C4 drops. Therefore, the waveform at the flame detection point must not be a smooth straight line, and the required I / O port must also be an analog (AD) detection port, and ordinary detection ports cannot be used. This will bring inconvenience to chip testing and hardware design, and the processing on the program will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q3/00F24H9/20
Inventor 刘玉婷金胜昔张秋俊曾森欧梦钦王浩良李绍健
Owner GREE ELECTRIC APPLIANCES INC
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