Control method of constant-air-volume split fresh air

Abstract

A control method of constant-air-volume split fresh air comprises the following steps of (1) starting a fresh air fan, and setting a running air volume; (2) calculating a fresh air volume and an exhaust air volume ratio; (3) adjusting the rotating speed of each fan in a fresh air system according to the ratio of the fresh air volume; (4) inspecting, by the sensor, the cleanliness of a filter screen, wherein if the cleanliness of the filter screen meets a set value, the air inlet fan works normally; (5) detecting the air inlet amount of an air inlet fan, wherein if the set air volume is met, the fan of the fresh air works normally, and if the set air volume is not met, a signal is sent to an air feeder, and the rotating speed of the air feeder is adjusted; (6) if the cleanliness of the filter screen does not meet the set value in the step (4), adjusting the rotating speed of the air inlet fan and the rotating speed of the air feeder at the same time; and (7) adjusting the rotating speedof the exhaust fan according to the proportion of the exhaust air volume. The air volume can be more accurately controlled by the control method, and the power of a fresh air system can be effectively reduced.

Description

technical field [0001] The invention belongs to a fresh air volume control method, in particular to a constant air volume split fresh air control method. Background technique [0002] The demand for fresh air volume of fresh fans is usually generated by indoor personnel and buildings. The demand for fresh air volume of some buildings is mainly related to the area of ​​the air-conditioning area, and the calculation is relatively simple. At present, the fresh air volume design of the indoor personnel demand in the industry usually uses sensors to estimate the maximum number of personnel, and realizes the control of the fresh air volume of the fresh machine according to the maximum number of personnel. [0003] However, since the number of people in the room changes, and the difference in the location of relevant sensors and the delay in collecting data will cause deviations in the detection of fresh air volume, the actual demand for fresh air volume cannot be accurately obtain...

AI Technical Summary

Problems solved by technology

[0003] However, since the number of people in the room changes, and the difference in the location of relevant sensors and the delay in collecting data will cause deviations in the detection of fresh air volume, the actual demand for fresh air volume cannot be accurately obtained, resulting in the inability to accurately obtain the actual air volume. The required fresh air volume, the problem of accurately controlling the fresh air volume of the fresh air machine

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