Isolation principle of isolation wards

Analyses the influences of pressure difference, door opening and closing, passing in and out of persons, temperature difference and buffer rooms on isolation effects. Indicates that pressure difference can affect isolation effects only when the door of isolation room is closed and the minimum theoretical value is 3 Pa; the effect of pressure difference can not counteract that of temperature difference because temperature difference can lead to air flowing inward and outward; the dynamic isolation effects of the buffer room is remarkable, and the total isolation coefficient is 48 for three rooms and one buffer room, and 3 212 for five rooms and two buffer rooms. Summarizes the general design principle for isolation wards.