Speed ​​regulation control device and method for shaded pole fan used in gas heating water heater

A gas heating and control device technology, applied in engine control, pump control, mechanical equipment, etc., can solve the problems of inability to adjust the speed, high speed of the shaded pole fan, high wind speed of the shaded pole fan, etc., achieve a good matching state, and the implementation method is simple , Realize the effect of intelligent constant temperature

Active Publication Date: 2016-08-24
GUANGZHOU TENGSHI INTELLIGENT CONTROL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the gas fans used in gas-fired heating water heaters are all fans driven by single-phase AC shaded pole motors. In this application, this gas fan is called a shaded pole fan. The shaded pole fan is a single-speed fan, and its speed cannot be adjusted.
In order to meet the air supply requirements of the gas heating water heater under the maximum heat load, the wind speed of the shaded pole fan is generally relatively high, which leads to the poor matching of gas and air when the water heater is in the middle load state, and the heating When the water heater is working at the minimum load state, the air volume is too large, the combustion is unstable, and even the flame is turned off
In addition, when the AC voltage changes from high to low, the speed of the shaded pole fan will change from high to low, and the gas and air will not match well, and the combustion will be unstable.

Method used

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  • Speed ​​regulation control device and method for shaded pole fan used in gas heating water heater
  • Speed ​​regulation control device and method for shaded pole fan used in gas heating water heater
  • Speed ​​regulation control device and method for shaded pole fan used in gas heating water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] refer to figure 1 , a speed control device for a shaded pole fan used in gas heating water heaters, used to adjust the speed of the shaded pole fan, including a power supply circuit, a microcontroller circuit, a voltage detection circuit, a zero-crossing detection circuit, a fan drive circuit and Fan speed feedback circuit, the power supply circuit is respectively connected with the microcontroller circuit, voltage detection circuit, zero-crossing detection circuit, fan drive circuit, fan speed feedback circuit and shaded pole fan, the AD port of the microcontroller circuit is connected to the voltage The detection circuit is connected, the first interrupt port of the micro-controller circuit is connected with the fan driving circuit, the second interrupt port of the micro-controller circuit is connected with the zero-crossing detection circuit, and the fan driving circuit is also connected with the zero-crossing detection circuit respectively. The circuit is connected ...

Embodiment 2

[0060] A speed regulation control method for a shaded pole fan used in a gas heating water heater, including:

[0061] After the microcontroller circuit receives the set speed of the shaded-pole fan input by the user, it obtains the voltage curve collected by the voltage detection circuit and the pre-stored speed threshold of the shaded-pole fan, and then calculates the cutting speed of the fan drive circuit at the set speed. wave time;

[0062] The microcontroller circuit judges in real time whether the zero-crossing signal sent by the zero-crossing detection circuit is received, and if so, sends the chopping time to the fan drive circuit, otherwise continues to judge;

[0063] After receiving the chopping time, the fan driving circuit performs chopping correspondingly, so as to control the effective value of the input voltage of the shaded pole fan, and then control the speed of the shaded pole fan;

[0064] The fan speed feedback circuit collects the real-time speed of the...

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Abstract

The invention discloses a speed control device and a speed control method of a shaded pole fan for a gas-heating hot water boiler. The device comprises a power circuit, a microcontroller circuit, a voltage detection circuit, a zero-crossing detection circuit, a fan driving circuit and a fan speed feedback circuit, the power circuit is connected with the microcontroller circuit, the voltage detection circuit, the zero-crossing detection circuit, the fan driving circuit and the fan speed feedback circuit and the shaded pole fan, an AD port of the microcontroller circuit is connected with the voltage detection circuit, the microcontroller circuit is connected with the fan driving circuit, the zero-crossing detection circuit and the fan speed feedback circuit, the fan driving circuit is further connected with the zero-crossing detection circuit and the shaded pole fan, and the fan speed feedback circuit is connected with the shaded pole fan. Closed-loop speed control on the shaded pole fan can be realized, the speed of the fan is stabilized automatically, the implementation mode is simple, control is facilitated, gas and air are in the well-matched state, and the device and the method can be widely applied to the gas-heating hot water boiler.

Description

technical field [0001] The invention relates to the field of speed control of a shaded pole fan used in a gas heating water heater, in particular to a speed regulation control device and method for a shaded pole fan used in a gas heating water heater. Background technique [0002] At present, the gas fans used in gas-fired heating water heaters are all fans driven by single-phase AC shaded pole motors. In this application, this gas fan is called a shaded pole fan. The shaded pole fan is a single-speed fan, and its speed cannot be adjusted. . In order to meet the air supply requirements of the gas heating water heater under the maximum heat load, the wind speed of the shaded pole fan is generally relatively high, which leads to the poor matching of gas and air when the water heater is in the middle load state, and the heating When the water heater works at the minimum load state, the air volume is too large, the combustion is unstable, and even the flame is turned off. In a...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F04D27/00
CPCF04D27/0261F05D2270/024
Inventor揭英营揭英明张金宝
OwnerGUANGZHOU TENGSHI INTELLIGENT CONTROL SYST