A random variable wind fan and random variable wind generation method

Abstract

The invention discloses a random variable wind fan which comprises a high-frequency oscillating circuit, an air speed data generation circuit, a variable speed pulse generation circuit, a D / A conversion circuit, a variable-speed speed control circuit, a random air speed upper limit adjusting circuit, a random air speed lower limit adjusting circuit, a power amplifying circuit, a direct-current power supply circuit, a magnetic saturation controllable reactor and a single-phase asynchronous motor. Meanwhile, the invention further discloses a random variable wind generation method. Air speed data signals which are changed periodically at a high speed are sampled and stored in a random mode by means of low-frequency variable speed pulses, and the fan speed is controlled through D / A conversion and power amplification. The magnitude of reference input voltage of the D / A conversion circuit is adjusted to change the maximum random variable air speed value. The relative fluctuation range of the random variable air speed is changed by adjusting the minimum value of the air speed data signals which are changed periodically at the high speed. The whole control circuit is not provided with a program control device, and interference resistance is strong. The fan is easy to operate, and a stepless speed adjusting function can be achieved.

Description

technical field [0001] The invention relates to a fan, in particular to a random variable wind fan and a random variable wind generating method. Background technique [0002] At present, the ordinary fans used in the indoor environment only have a simple step-by-step speed regulation function, and the method is monotonous, which is quite different from the natural environment. Or only change according to the built-in curve, or only control according to the change of temperature, which cannot meet various needs. [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 simulation of natural wind, ...

AI Technical Summary

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 periodically repeated. Unable to change the wind speed and fluctuation range according to your 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 and increases the probability of failure; the use of DC brushless motors is costly and difficult to maintain, and frequency conversion is required 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 real chaos theory, and the effect of natural wind is good, but the whole system is complex and costly, and is not suitable for application on conventional fans

[0011] Patent application number 201310191716.X "Fan and method for simulating natural wind" uses a single-chip microcomputer program to simulate natural wind. The natural wind simulation method is flexible, but the single-chip microcomputer is easily disturbed, causing the fan to crash and lose control

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