Natural wind simulating fan and method

Abstract

A natural wind simulating fan comprises a single-chip microcomputer, a maximum wind-speed setting potentiometer, a wind speed fluctuation range setting potentiometer, a direct-current chopper control circuit, a magnetic saturation controllable electric reactor, a fan motor and a direct-current power source. The invention further discloses a natural wind simulating method which includes: initializing; reading maximum wind speed and wind speed fluctuation range setting values; randomly confirming preset time duration and target value of a wind speed control section and a wind speed changing mode of the section; and timing the wind speed control section, calculating a wind speed set value of the fan according to the confirmed wind speed changing mode, converting the wind speed set value of the fan into pulse-width modulation (PWM) pulse signals to output and the like. The natural wind simulating fan and method simulates the natural wind by using a magnetic saturation controllable electric reactor and common single-phase asynchronous motor series connection speed adjusting method, the natural wind can be simulated easily, harmonic pollution on a power grid cannot be caused, and the maximum wind speed and the wind speed fluctuation range of the natural wind can be set through the potentiometer.

Description

technical field [0001] The invention relates to a fan, in particular to a fan capable of simulating natural wind and a method for simulating natural wind. Background technique [0002] At present, the ordinary fans used in the indoor environment only have a simple step-by-step speed regulation function, the method is monotonous, and it is quite different from the natural environment. The fan either only changes according to the built-in curve, or only controls according to the change of temperature, which cannot meet various demands. [0003] Patent Application No. 91211765.6 "Electronic Timing Simulated Natural Wind Fan Control Device", Patent Application No. 90209401.7 "Simulated Natural Wind Controller", Patent Application No. 91214603.6 "Electric Fan Simulated Natural Wind Controller", using simple electronic circuits to control wind speed The size and time, using the SCR voltage regulation method to control the change of the motor speed, only realizes the primary simul...

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Problems solved by technology

[0006] Patent Application No. 201020668439.9 "A Disturbed Natural Wind Fan" and Patent Application No. 97116771.0 "Method for Forming Natural Wind and Natural Wind Fan" realize a disordered natural wind through the structure, and the use method is limited

[0007] Patent Application No. 201210086869.3 "A Control Method for Fan Comfortable Wind" uses gears to set the operation mode and wind speed, and the operation method is complicated; the speed of the fan speed is set to rise or fall at a constant speed, which is different from the actual natural wind. The random change does not meet; the use of brushless DC motors is costly and difficult to maintain, and a frequency converter is required to cooperate with speed regulation

[0008] Patent Application No. 200510086921.5 "A Terminal Dynamic Air Supply Device for Individualized Air Conditioning System" stores the dynamic wind sample wind speed signals of natural wind, sinusoidal wind, pulse wind, and random wind flow in the memory, and the single-chip microcomputer reads the sample wind speed signal , through the voltage amplification circuit or frequency conversion circuit to control the brushless DC motor speed, the natural wind generated is only related to the sample wind speed signal stored in the memory. Due to the limited number of samples, the effect of natural wind must be repeated periodically. In addition, Users cannot change the wind speed and fluctuation range according to their own needs

[0009] Patent application number 200810185769.X "A device and method for simulating natural wind" uses a memory to store a variety of natural wind speed sample signals, and randomly selects a sample signal for control. Due to the limited number of samples, the effect of natural wind is the same It is difficult to avoid periodic repetition; the use of closed-loop control can improve the accuracy of speed regulation, but the addition of automatic control system also reduces the stability of the device's work and increases the probability of failure, so it is not necessary to apply it to conventional fans; it adopts DC brushless motor The cost is high, maintenance is difficult, and a frequency converter is required to cooperate with speed regulation; at the same time, users cannot change the wind speed and fluctuation range according to their own needs

[0010] The patent application number 201010276923.1 "A device for simulating natural wind based on chaos theory" realizes natural wind based on chaos theory, and the effect of natural wind is better, but the whole system is complex and costly, so it is not suitable for application on conventional fans

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