An air curtain machine uses a motor to drive a cross-flow or centrifugal fan wheel to generate a powerful airflow, creating an "invisible door curtain." It divides indoor and outdoor areas into two independent temperature zones, creating a comfortable indoor environment, maintaining indoor air conditioning and purifying indoor air. While saving electricity, it also facilitates air circulation, effectively isolating dust, smoke, odors, insects, and microorganisms. It prevents the outflow of cold (warm) air, saving energy and effectively preventing cold (warm) air leakage. By dividing indoor and outdoor areas into two independent temperature zones, it assists in circulating and regulating temperature during prolonged operation of air conditioning systems, achieving the goals of energy conservation, environmental improvement, dust prevention, and insect repellence.
Insulation Function
Air curtain machines are primarily used in places like restaurants and shops where customers frequently enter and exit, requiring constant door opening and closing. This can maintain indoor cold or warm air temperature with 60-80% efficiency, allowing only minimal temperature changes.

Insect Repellent Function
It can be observed that most annoying and harmful insects cannot pass through the air curtain barrier. This makes it easier to maintain hygiene in places such as fruit counters and fast-food restaurants.

Heating Function
Air curtain machines also include electric heating air curtains, typically using PTC heating. There are also water-heated air curtain machines. Both types can raise the temperature at entrances and exits, with temperature increases ranging from 30 degrees to 60 degrees. They are commonly used in northern regions.

Dust Prevention Function
If an air curtain machine is installed in the lobby of a machinery factory or a food or clothing store facing a bus lane, it can effectively reduce external dust and maintain cleanliness at a 60-80% level.