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　换气功能的作用

　　在使用一般空调的房间里，人不断消耗氧气产生二氧化碳、汗臭、体臭，尤其是吸烟，使室内空气质量恶化，对人的健康不利，会会产生“空调病”。通过换气功能：

　　补充室内氧气。因为人体不断消耗氧气，使室内含氧量下降，通过室外含氧量高的空气补入，提高室内空气的含氧量。

　　排出室内污浊空气。长时间使用空调，室内容易产生各种异味，如汗臭、体臭及烟味等，通过换气空调对室内空气不断更新，及时排出室内异味，使空气质量提高，有利于人体的健康。

　　保湿。因为空调在制冷时，蒸发器在不断冷凝水分并排出室外，造成室内空气水分流失。换气空调通过室外含湿量高的空气补入，达到保湿的作用。

　　换气的原理

　　换气空调的换气功能是通过空调内置的换气装置实现的，换气装置各品牌有差异，有的装在室内机有的装在室外机，换气装置分为四部分：蜗壳、直流电机、风轮及排气管。当换气时，一部分室内回风被换气装置抽出室外，此时室内空气密度下降，产生负压(相对于室外气压)，由于室内、外有压力差，室外的新鲜空气就通过门窗缝进入室内，达到改善室内空气质量的目的；或者是将室外的空气直接抽入室内，此时室内空气密度上升，产生正压(相对于室外气压)，由于室内、外有压力差，室外的污浊空气就通过门窗缝被换出，从而达到改善室内空气质量的目的。

Function of ventilation

In the use of general air-conditioned room, people continue to consume oxygen to produce carbon dioxide, odor, body odor, especially smoking, indoor air quality deterioration, adverse to human health, will lead to "air sick." Through the ventilation function:

To supplement the indoor oxygen. Because the body constantly consume oxygen, the oxygen content down to make room through the outdoor high oxygen content of air added to improve the indoor air of oxygen.

Discharge of polluted indoor air. Prolonged use of air conditioning, are prone to odor, such as odor, body odor and smoke, etc., through the ventilation air conditioning indoor air continuously updated, timely discharge of indoor odor, improve the quality of the air, is conducive to human health.

Moisture. Because the air conditioning in the cooling, the evaporator condensate water and constantly exhausted to the outside, resulting in the loss of indoor air moisture. Outdoor ventilation air through the high air moisture content added to achieve the moisturizing effect.

Ventilation principle

Ventilation air conditioning ventilation air conditioning function is built-in ventilation devices to achieve, there are differences between the brand ventilation equipment, some equipment, some installed in the indoor unit outdoor unit, ventilation unit is divided into four parts: scroll , DC, the wind wheel and exhaust pipe. When the ventilation, the part of the indoor return air ventilation device to be drawn outside, then the indoor air density decreased, resulting in negative pressure (relative to outside pressure), due to indoor and outdoor pressure difference, the fresh outdoor air entering through the slit windows and doors Interior, to improve indoor air quality purposes; or the outdoor air directly drawn into the room, then the indoor air density increased, resulting in positive pressure (relative to outside pressure), due to indoor and outdoor pressure difference, outdoor air pollution seam through the doors and windows are swapped out, so as to improve indoor air quality.