An intelligent control method of a fresh air unit and a fresh air unit applying the method

Abstract

The invention discloses an intelligent control method for a fresh air handling unit. The control method comprises the following steps: (1) monitoring indoor and outdoor temperature values, an indoor CO2 concentration value and a PM2.5 concentration value in real time; and (2) firstly, adjusting the openness of a fresh air valve according to the monitored indoor and outdoor temperature values and an indoor temperature priority algorithm, and when the outdoor temperature or indoor temperature is in a preset range, calculating and executing the openness of the fresh air valve according to the monitored CO2 concentration value, the PM2.5 concentration value and an air quality balance algorithm. The invention further provides the fresh air handling unit applying the control method. By the adoption of the indoor temperature priority algorithm and the air quality balance algorithm, the indoor temperature can be guaranteed preferentially under any working condition, and then the indoor PM2.5 concentration and the indoor CO2 concentration are effectively controlled, so that the environmental quality of air in a classroom is guaranteed, and the comfortable sensation of a student to a learning environment is enhanced; and the operation duration of the fresh air handling unit is preset according to a class period and background noise in the classroom, so that no influence on the class teaching is caused during the operation of the fresh air handling unit, and a good learning environment is supplied to the student.

Description

technical field [0001] The invention relates to the technical field of indoor air quality control, in particular to an intelligent control method of a fresh air unit and a fresh air unit applying the method. Background technique [0002] The classroom is an important space for students of all ages to stay for a long time. Due to the high density of people in the classroom, the CO produced by human respiratory metabolism 2 and other harmful gases are very easy to accumulate in the classroom, if the classroom is not well ventilated, it will cause CO 2 If the concentration is too high, it will cause chest tightness, shortness of breath, dizziness, headache, drowsiness, and reduced learning efficiency. Studies at home and abroad have shown that when the classroom is not well ventilated, CO 2 The concentration will be obviously high, resulting in students' concentration of attention is only 75% of the usual, reaction speed is only 50% of the usual, short-term memory ability is ...

AI Technical Summary

Problems solved by technology

The consequence is that although the concentration of PM2.5 can be reduced to a certain extent, other pollutants in the classroom cannot be effectively discharged

[0004] This shows that above-mentioned existing indoor air quality improvement method still has inconvenience and defect, and urgently needs to be further improved

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