（3） Ventilation: there is a row of ventilation holes on the left and right sides of the fully automatic incubator, which can not only ventilation also plays a role in regulating the temperature difference between the upper and lower parts. Good ventilation conditions can provide sufficient oxygen for the embryo, while discharging carbon dioxide to ensure the gas metabolism and physiological function of the embryo. If the ventilation is poor, there will be malposition and abnormal embryo, even death. In the early stage of incubation, due to the low metabolism of substances, the oxygen demand is low; In the later stage, the metabolism is vigorous and the oxygen demand is more. After 19 days, the embryo begins to breathe in the lung, and the oxygen demand is more.
1. When there is a contradiction between thermal insulation and ventilation, thermal insulation shall be satisfied first, and then ventilation shall be considered. Aoxiang high-grade full-automatic incubator does not need to consider manual ventilation.
2. Prevent sulfur dioxide poisoning; The specific gravity of sulfur dioxide is smaller than that of air, so it is in the upper part of the incubator. In order to prevent poisoning, a small hole should be left on the top of the incubator.
