Draught fan control method and air conditioning system and air duct system and computer readable storage medium

Abstract

The invention provides a draught fan control method, an air conditioning system, an air duct system and a computer readable storage medium. The draught fan control method comprises the following stepsof: obtaining an actual pressure difference value of an air inlet side and an air outlet side of a heat exchanger; calculating a pressure difference deviation numerical value by applying the actual pressure difference value and a target pressure difference value, judging whether the pressure difference deviation numerical value exceeds a preset range, if yes, calculating the adjusting rotating speed of the draught fan by applying the current rotating speed of the draught fan and the pressure difference deviation numerical value, and controlling the operation of the draught fan according to the adjusting rotating speed. The invention also provides the air conditioning system, the air duct system and the computer readable storage medium which realize the method. The rotating speed of the draught fan can be dynamically adjusted according to the difference value between the pressure value of the air inlet side of the heat exchanger and the pressure value of the air outlet side of the heatexchanger to ensure that the air volume of the draught fan is kept constant; and the rotating speed of the draught fan satisfies the requirements on the best rotating speed of the draught fan when the heat exchanger has the best heat exchange efficiency.

Description

technical field [0001] The present invention relates to the control field of air-conditioning systems, and in particular, relates to a fan control method, an air-conditioning system applying the method, an air duct system, and a computer-readable storage medium. Background technique [0002] As an important air temperature regulating appliance, air conditioners are widely used in various occasions. Now most of the homes, offices, and commercial places are equipped with air conditioners. Central air-conditioning systems are usually installed in large offices and shopping malls, while hanging air conditioners or cabinet air conditioners are usually used in homes or small offices. Central air conditioning systems, hanging air conditioners, and cabinet air conditioners can all be called air conditioning systems. Air conditioning systems usually use ducts to deliver cool or warm air to where it is needed. Usually, the air-conditioning system is equipped with heat exchangers, fan...

AI Technical Summary

Problems solved by technology

[0004] But, following situation can occur in actual use: the one, along with the service time of air-conditioning system increases, will cause the accumulation of dust at air filter 12 place, the increase of the resistance of air passing through air filter 12 service time will be The second is that in actual application, the air supply pipe 15 has different types, shapes and lengths, and the actual resistance of the air passing through the air supply pipe 15 is difficult to accurately calculate.

If the blower fan 13 runs at a fixed speed, it will not be able to adapt to the use of the above situation. For example, when the resistance of the air passing through the air filter 12 and the resistance of the air supply pipe 15 are greater than the design resistance, the air volume of the air conditioning system will be too low. ; When the air passes through the resistance of the air filter 12 and the resistance of the air supply pipe 15 is smaller than the design resistance, the air output will be too high

[0005] Whether the air volume is too large or the air volume is too low, it will affect the comfort of the human body.

Moreover, the heat exchange efficiency of the heat exchanger 11 has an optimal wind speed requirement. Too high or too low wind speed will reduce the heat exchange efficiency of the heat exchanger 11, affect the heat exchange capacity of the air conditioning system, and affect the outlet air temperature.

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