Ventilation

Ventilation is a mechanical process that moves air in and out of the lungs. Patients may require intravenous support ranging from apnea to patients experiencing decreased respiratory function. A significant decrease in the respiration rate of a patient can cause hypercapnia, hypoxia, a decrease in pH, and a decrease in respiration rate. If you do not correct it, your heart and breathing may stop. Ventilation of exhalation is a technique selected from the late 1950s.

Intentional introduction of land air can be divided into mechanical ventilation or natural ventilation. Mechanical ventilation uses fans to drive underground air into the building. This can be achieved by pressurization (in the case of positive pressure buildings) or reduced pressure (in the case of exhaust ventilation systems). Many mechanically ventilated buildings use two combinations and ventilation is integrated into the HVAC system. Natural ventilation is a deliberate indirect flow of ground air entering the building through planned openings (blinds, doors, windows etc). Natural ventilation does not require a mechanical system to move air above the ground and is entirely dependent on passive physical phenomena such as diffusion, wind pressure, or stacking effect. Mixed mode ventilation system uses mechanical and natural processes

Natural ventilation utilizes the force that is naturally available to supply and discharge air in a closed space. There are three types of natural ventilation in the building. Ventilation by wind, flow by pressure, stacking ventilation. The pressure generated by the "stacking effect" depends on the buoyant force of heated air or rising air. Wind-induced ventilation depends on the wind forces commonly used to draw and push air through damage to the surrounding winds and building exteriors. Professor Won Jun Kwon of Seoul National University recently discovered a new way to ventilate the indoor space in a large space. The so-called "air pump" system uses air pressure inside and outside the room to send air out of the building. (See invasion (HVAC))