Fan control device and control method thereof
A control device, fan technology, applied in pump control, mechanical equipment, machine/engine, etc., can solve the problems of excessive flue gas, poor combustion, increased smoke exhaust resistance, etc., to achieve fan control safety, solve the problem of excessive flue gas, Solve the effect of poor combustion
Pending Publication Date: 2018-10-23
ARISTON THERMO CHINA
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a fan control device and a fan control method based on the fan control device. Through feedback control, it can avoid the increase of smoke exhaust resistance, the air volume and the gas volume. Matching leads to poor combustion and excessive smoke
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[0026] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0027] like figure 1 As shown, a fan control device proposed by the present invention includes:
[0028] The fan driving circuit 1 generates a driving voltage to drive the fan and adjust the speed of the fan according to the control signal;
[0029] The speed feedback circuit 2 is used to collect the speed signal of the fan;
[0030] The voltage feedback circuit 3 is used to collect the feedback voltage when the fan is running.
[0031] figure 1 Among them, the fan drive circuit 1 includes a PMOS tube Q1, diodes D1, D2, resistor R1, inductor L1, capacitors C1, C2;
[0032] The control signal is connected to one end of the resistor R1, the anode of the diode D1 and the gate of the PMOS transistor Q1; the source of the PMOS transistor Q, the other end of the resistor R1 and the cathode of the diode D1 are connected to the supply voltage VCC; the drain of the ...
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The invention provides a fan control device which includes a fan drive circuit, a rotary feedback circuit and a voltage feedback circuit. The fan drive circuit generates drive voltage so as to drive afan and adjust the rotating speed of the fan according to control signals. The rotary speed feedback circuit is used for collecting rotary speed signals of the fan. The voltage feedback circuit is used for collecting feedback voltage when the fan runs. A fan control method includes the steps of a normal control stage of the fan and an accelerated control stage of the fan, and the feedback voltageis used as the basis of adjusting control in the both stages. In the normal control stage of the fan, the feedback voltage is monitored, if the feedback voltage is lower than the feedback voltage reference value, the voltage is driven to increase, and the fan rotary speed is increased accordingly so as to maintain the feedback voltage at the feedback voltage reference value or close to the feedback voltage reference value; and if the feedback voltage is higher than the feedback voltage reference value, the voltage is driven to reduce. The drive voltage is increased from the normal control stage of the fan to the accelerated control stage of the fan. According to the fan control device and the control method thereof, the problems of poor combustion and excessive flue gas due to the mismatch of air quantity and gas quantity are solved.
Description
technical field [0001] The invention relates to a fan control device, in particular to an extension control device which uses feedback voltage as an adjustment target to adjust the fan speed. Background technique [0002] When the forced exhaust gas water heater burns, the fan needs to run to provide air to match the gas volume of the burner. The basic wind speed of the existing water heater is constant or a small increase in wind speed. When the external wind is strong or other reasons cause the smoke exhaust resistance to be large At this time, ordinary fan control cannot sense the changes in the external environment and automatically adjust the wind speed or only make a small amount of wind speed changes, resulting in a mismatch between the air volume and the gas volume, resulting in poor combustion and excessive smoke. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a fan control devi...
Claims
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IPC IPC(8): F04D27/00
CPCF04D27/004Y02B30/70
Inventor 张钰锋姚大进周杰叶胜利
Owner ARISTON THERMO CHINA