Fresh air system and air change control method and device thereof

Abstract

The invention belongs to the technical field of air conditioner control and provides a fresh air system and an air change control method and device thereof. An outdoor air quality index is obtained by detecting the dust concentration and odor concentration of outdoor air, and whether the outdoor air quality is good is judged. Meanwhile, an elastic parameter is obtained according to a detected indoor carbon dioxide concentration and a preset carbon dioxide concentration, and whether indoor air meets air change execution conditions is judged according to the elastic parameter. When the outdoor air quality is very good and the indoor air does not meet the air change execution conditions, on-off control over the air change function of the fresh air system is conducted or the air change speed of the fresh air system is controlled according to the obtained outdoor air quality index and the elastic parameter. Accordingly, the air change function of the fresh air system can be regulated and controlled. In this way, the air change function is not performed in a whole course when the fresh air system operates. The service life or replacement cycle of a dust removal component and an odor removal component is prolonged. Furthermore, the maintenance cost of the fresh air system is lowered.

Description

technical field [0001] The invention belongs to the technical field of air conditioning control, and in particular relates to a fresh air system and a ventilation control method and device thereof. Background technique [0002] At present, for the fresh air system, it needs to remove the dust and odor from the outdoor air before sending it into the room to perform ventilation treatment on the indoor air during operation. For dust removal treatment, it usually uses filters or electronic dust collectors to filter or collect fine particles and inhalable particles in the outdoor air; for odor removal treatment, it usually uses activated carbon to treat sulfur dioxide, Odor gases such as nitrogen, ozone and carbon monoxide are adsorbed. However, since the quality of indoor air and outdoor air will change, if the indoor air is good and the outdoor air quality is poor, even if the indoor air is not ventilated for a period of time, it will not affect the user. However, the existin...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a fresh air system ventilation control method, aiming to solve the problem that the existing fresh air system turns on the ventilation function throughout the operation and shortens the service life or replacement cycle of the components used for dust removal and odor removal. And then increase the maintenance cost of the fresh air system

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