Ignition and detection circuit and gas wall-hung boiler based on boost principle

An ignition power supply and fire detection technology, which is applied to the ignition, combustion ignition, and combustion methods of electric sparks, can solve problems such as inductive whistling, and achieve the effects of eliminating inductive whistling, improving safety, and reducing difficulty.

Active Publication Date: 2020-01-21
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of inductance howling when the inductance passes high-frequency current in the prior art, the present invention proposes a pulse ignition and detection circuit based on the BOOST principle and a gas wall-hung boiler using the circuit

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  • Ignition and detection circuit and gas wall-hung boiler based on boost principle
  • Ignition and detection circuit and gas wall-hung boiler based on boost principle

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Embodiment Construction

[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 uses a transformer to replace the inductance in the step-up circuit, and feeds back the voltage of the ignition power supply. One element plays two functions, which can eliminate the inductance howling and safely isolate the ignition power supply and the controller.

[0025] The invention discloses an ignition detection circuit based on BOOST principle, see figure 1 , which includes a controller and an ignition module, the ignition module includes a boost and detection unit, the boost and detection unit is connected to an external DC power supply, used to maintain the igniti...

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Abstract

The invention discloses an ignition and fire detection circuit based on a BOOST principle and a gas wall-hanging stove. The ignition and fire detection circuit comprises a controller and an ignition module; the ignition module comprises a boosting and detecting unit; and the boosting and detecting unit is connected with an external direct-current power source to be used for maintaining an ignitionpower source at a set voltage, and meanwhile a detected ignition voltage of the ignition power source is fed back to the controller. The ignition and fire detection circuit based on the BOOST principle and the gas wall-hanging stove eliminate the inductance squealing problem, a high voltage of the ignition power source is isolated from a controller chip, and the safety of the circuit is improved;the ignition module and a flame detection module share one boosting circuit, and the circuit cost is lowered; and a comparator is adopted for outputting a flame parameter signal, an I / O port connected with a flame detection signal is changed into a common detection port from an analog (AD) detection port, a detection signal is more accurate, and difficulty is greatly lowered during hardware design and software programming.

Description

technical field [0001] The invention relates to a gas ignition circuit, in particular to a pulse ignition and detection circuit based on the BOOST principle and a gas wall-hung boiler using the circuit. Background technique [0002] Gas equipment such as gas water heaters, gas hot air stoves, gas boilers, gas wall-hung boilers, etc., the circuits of these products include ignition and flame detection circuits. When igniting, the direct current needs to be boosted. After boosting, the voltage of the ignition power supply needs to be fed back to the controller, and the controller performs closed-loop control. Inductance, the main component of the current step-up, generates high voltage by energizing and discharging the inductance; in addition, a sampling circuit using resistor divider is used to feed back the voltage of the ignition power supply to the controller. Such a circuit has the following defects: 1. The noise is relatively large when the inductor passes through the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23Q3/00F24H9/20
Inventor 刘玉婷金胜昔汪春节张秋俊曾森张霞郭特特
Owner GREE ELECTRIC APPLIANCES INC
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