阅读说明：本技术 新风机 (New fan ) 是由 刘民 于 2021-02-24 设计创作，主要内容包括：本发明涉及一种弹射新风机,特别是一种通过信噪比控制实现智能控制风机功率的智能控制新风机。新风机包括风扇与风扇控制电路,其特征是风扇控制电路包括环境噪音传感器,传感器输出信号处理电路,传感器输出信号处理电路,包括电压或者电流比较电路,并将比较结果转变为输出信号,驱动风扇功率放大器工作,实现风机根据环境噪音输出功率的目的。(The invention relates to a new ejection fan, in particular to an intelligent control new ejection fan which realizes intelligent control of fan power through signal-to-noise ratio control. The new fan comprises a fan and a fan control circuit, and is characterized in that the fan control circuit comprises an environmental noise sensor, a sensor output signal processing circuit and a sensor output signal processing circuit, wherein the sensor output signal processing circuit comprises a voltage or current comparison circuit, and converts a comparison result into an output signal to drive a fan power amplifier to work, so that the purpose that the fan outputs power according to the environmental noise is achieved.)

1. The new fan comprises a fan and a fan control circuit, and is characterized in that the fan control circuit comprises an environmental noise sensor, a sensor output signal processing circuit and a sensor output signal processing circuit, wherein the sensor output signal processing circuit comprises a voltage or current comparison circuit, and converts a comparison result into an output signal to drive the fan motor power amplifier to work in different output power modes, so that the purpose of outputting power according to the environmental noise by the fan is realized.

2. The new fan as claimed in claim 1, wherein: the sensor output signal processing circuit is a processing circuit which takes a singlechip as a core or a processing circuit which consists of an analog circuit taking an operational amplifier as a core,

3. the new fan as claimed in claim 1, wherein: the fresh air machine control circuit is provided with a human body signal sensor.

4. The new fan as claimed in claim 1, wherein: the new fan is provided with an outdoor noise sensor and an indoor noise sensor at the same time.

5. The new fan as claimed in claim 1, wherein: the control of the fresh air machine comprises the following steps:

firstly, an environmental noise sensor senses environmental noise and outputs an analog signal or a digital signal;

secondly, the fresh air machine control circuit is used for arranging output signals of the human body signal sensor and the environmental noise sensor to sense environmental noise and output signals to carry out logic judgment, and judging whether a person exists in the working environment of the fresh air machine or the activity state of the person, such as conversation, movement or sleep;

the sensor output signal processing circuit further issues a command or a signal of the output power of the fan motor to the fan control circuit according to the noise condition and the actual condition of the personnel.

(I) technical field

The invention relates to a new ejection fan, in particular to an intelligent control new ejection fan which realizes intelligent control of fan power through signal-to-noise ratio control.

(II) background of the invention

The new fan is an air purification device, generally has the function of air inlet or air exhaust, or both functions, and generally filters the inlet air and treats the same.

The small-size new fan receives the volume restriction now, and the means of eliminating the noise is limited, leads to meeting the noise bigger than normal when great power work, and the problem that influences user's sleep appears, and it is very little to have the fan output that leads to when the noise reduction, and gas exchange volume is very little, can't solve such a pair of contradiction.

Disclosure of the invention

In view of the defects of the fresh air fan, the invention provides the fresh air fan which intelligently controls the output power according to the environmental noise. The adaptability of the fresh air machine is greatly improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the new fan comprises a fan and a fan control circuit, and is characterized in that the fan control circuit comprises an environmental noise sensor, a sensor output signal processing circuit and a sensor output signal processing circuit, wherein the sensor output signal processing circuit comprises a voltage or current comparison circuit, and converts a comparison result into an output signal to drive the fan motor power amplifier to work in different output power modes, so that the purpose of outputting power according to the environmental noise by the fan is realized.

The sensor output signal processing circuit is a processing circuit which is formed by a processing circuit with a singlechip as a core or an analog circuit with an operational amplifier as a core, and drives a fan motor power amplifier to work, so that the purpose that a fan outputs power according to environmental noise is realized.

Further, new fan control circuit settles human signal sensor, can be infrared sensor, ultrasonic sensor, microwave sensor, vibration sensor, visual image analysis sensor, through noise sensor and the inseparable combination of above-mentioned multiple sensor, judge whether the noise source goes out in indoor personnel's activity through logical operation more accurate, still be the simple ambient noise of non-personnel's activity, more accurate perception environment like this, control fan power, better completion clean air reaches the purpose of practicing thrift the energy consumption simultaneously, hold many birds with one stone.

Furthermore, the outdoor noise sensor and the indoor noise sensor are arranged in the fresh air fan at the same time, and the noise signals output by the outdoor noise sensor and the indoor noise sensor are compared and judged through the control circuit or the singlechip arithmetic circuit.

The circuit is simple in working process, firstly, the environmental noise sensor senses environmental noise and outputs a corresponding analog signal or digital signal, the analog signal or the digital signal is used for further controlling the sensor output signal identification circuit amplification circuit, and then further driving the fan power amplifier to drive the fan to work, so that the purpose of correspondingly driving the fan according to the environmental noise is achieved, for example, in a quiet sleeping environment, the environmental noise sensor senses and outputs 1V voltage, the fan is controlled to rotate below two thousand turns, and noise which cannot be output by 30 decibels is output; under loud environment, the environmental noise sensor senses and outputs 4V voltage, the fan is controlled to rotate below four thousand revolutions, noise which is not 50 decibels is output, and through simple calculation of signal-to-noise ratio relation, we can clearly see that the output noise cannot be sensed at all, so that the relation between the noise and the rotating speed is solved successfully,

further, new fan control circuit settles human signal sensor, can be infrared sensor, ultrasonic sensor, microwave sensor, vibration sensor, visual image analysis sensor, through noise sensor and the inseparable combination of above-mentioned multiple sensor, judge whether the noise source goes out in indoor personnel's activity through logical operation more accurate, still be the simple ambient noise of non-personnel's activity, more accurate perception environment like this, control fan power, better completion clean air reaches the purpose of practicing thrift the energy consumption simultaneously, hold many birds with one stone.

The control of the fresh air machine comprises the following steps:

1. the environmental noise sensor senses environmental noise and outputs an analog signal or a digital signal;

2. the fresh air machine control circuit is used for arranging a human body signal sensor output signal and an environmental noise sensor to sense environmental noise and output the signals to make logic judgment, and judging whether a person exists in the working environment of the fresh air machine or the activity state of the person, such as conversation, movement or sleep;

3. the sensor output signal processing circuit further issues a command or a signal of the output power of the fan motor to the fan control circuit according to the noise condition and the actual condition of the personnel.

The single chip microcomputer programming control for installing the noise sensors inside and outside the fresh air machine room comprises the following steps:

1. reading data of an indoor noise sensor, and outputting 2.5V voltage corresponding to the noise sensor when the indoor noise is greater than a set decibel, for example, 30 decibels are set;

2. reading data of an outdoor noise sensor, comparing the data with the data of the outdoor noise sensor, and when the indoor noise is larger than the outdoor noise, further judging whether a person exists in a room through other sensors such as an infrared sensor, and when the person exists, starting the output state of the high-power exhaust fan to work;

3. when 2 steps read outdoor noise sensor data to compare the two size, when indoor noise is less than outdoor noise, further judge whether indoor has someone through other sensors, like infrared ray sensor, when nobody, directly close fan motor.

The steps are calculated and judged by a single chip microcomputer program, and the work of the fan and the motor is controlled, so that the aim of saving electric energy is fulfilled.

The fan motor comprises an air inlet fan motor and an air exhaust fan motor.

For example, if the number of people is large and noisy, the output power is maximized, the output power is minimized when the people are asleep, the people are in low-power quiet work, no people exist, only the noisy sound of the environment exists, and the new fan can be turned off and does not work. Therefore, the operation power of the fan is controlled according to the environmental noise, the proper signal to noise ratio is controlled, indoor personnel can not feel the noise of the fresh air fan all the time, or the noise is very small, whether the personnel exist or not can be intelligently judged, even the fresh air fan is closed, and the purpose of saving energy is achieved.

The intelligent control system has the beneficial effects that the problems that the noise is large and the sleep of a user is influenced when the fan works at a high power are solved, the output power and the control noise of the fresh air fan can be intelligently adjusted according to the environmental noise, the existence of personnel and the activity state of the personnel can be intelligently judged, the output power is further determined, and even the fresh air fan is turned off to reach an energy-saving state, so that the intelligent control system is significant.

(IV) description of the drawings

Fig. 1 is a schematic diagram of a new fan circuit of the present invention.

In the figure, the single chip microcomputer is 16F877A, JPO is an environmental noise sensor, MGO is a motor, and BTO is a battery pack.

(V) detailed description of the preferred embodiments

In the example of fig. 1, a single chip microcomputer OIC16F877A is used as a circuit core, JP0 is a noise sensor, MG0 is a motor, and a BTO bit battery pack, according to fig. 1, each element is electrically connected correspondingly, a brushless motor can be used as a power motor, a motor pulse control signal PWM is output from the single chip microcomputer, a speed regulation function is performed on the brushless motor, when JP0 is a noise sensor for sensing environmental noise, and an analog quantity signal of 0-5V is output, the signal is input to 2-degree of the single chip microcomputer PIC16F877A, and under the operation judgment of an internal program of the single chip microcomputer, the PWM signal is controlled and output to drive the motor to perform corresponding power output and change, further, a human body infrared sensor can be installed to judge whether a person is in the environment, the noise sensor can be simultaneously indoors and outdoors, the program operation of the single chip microcomputer judges or further comprehensively judges whether the noise is indoor person activity, or outdoor ambient noise, and finally determines the working state of the fan motor.