Et VENTILATIO ratio puerperium effusus est divisa in positivum pressura VENTILATIO, negans pressura evacuatione, pari pressura (vel micro positivum pressura) VENTILATIO modus, et naturalis evacuatione. Positive-pressure ventilation and equal-pressure (or micro-positive) ventilation modes apply to filtration systems, there are also negative pressure ventilation for the mode of filtration system, natural ventilation used in the traditional independent building design, the current modern pig house has been used, this paper mainly introduces the most common negative pressure mode of maternity care in the ventilation system.
In the case of non filtration negative pressure, according to the different ways of the air intake, but also divided into roof wind mode, curtain cooling roof into the wind mode, and roof plus the longitudinal wind of the joint mode of the curtain. In aestate velit maximum temperatus septentrionalem frigus regione in Sina non plus quam vel leviter supra XXX gradu, can capere tectum in ventum vel sagum frigefaciendo tectum ventus modus; Alia aestate altum temperatus area capere compositum de tecto et sagum vertical vento vel sagum refrigerationem tectum ventus modus (hoc modus requirit tecto et laquearia simul usura adaequatum evacuatione, et secundum spatium ad curare evacuatione in effusione).
