What is an air curtain? What is it used for?

I. What is an air curtain?
An air curtain, also known as an air door, air curtain machine, air barrier, or air gate, is a device that generates a powerful airflow using circulating fans, creating an invisible barrier.

II. Applications of air curtains
Air curtains are installed above the entrances of refrigeration, air-conditioning, dust-proof, and heat-insulating areas in places such as shopping malls, theaters, hotels, restaurants, conference halls, cold storage rooms, operating rooms, and homes. When activated, they separate the indoor and outdoor air, providing convenience for entry and exit while preventing the exchange of cold and hot air. Additionally, they have the ability to prevent dust, pollution, mosquitoes, and flies. They are widely used in industries such as electronics, instrumentation, pharmaceuticals, food, precision processing, chemicals, footwear, services, and commerce.

III. Features and functions of air curtains
Air curtains generate high-speed airflow, dividing the indoor and outdoor areas into two separate temperature zones, creating a comfortable indoor environment. They maintain the effectiveness of indoor air conditioning and air purification, save energy, promote air circulation, and effectively isolate dust, smoke, odors, and insects. They prevent the outflow of cold or warm air, saving electricity. By creating an air barrier, they effectively prevent the leakage of cold or warm air, saving energy and improving the environment. They also have dust and insect prevention capabilities, as the high-speed airflow forms a protective barrier, effectively blocking outdoor dust and flying insects, thus ensuring indoor cleanliness. The air circulation system of air curtains prevents the diffusion of oily fumes, spicy odors, industrial exhaust gases, and vehicle emissions, among other harmful gases, from entering indoor spaces. In large spaces such as sports arenas, cinemas, and entertainment venues where air conditioning energy distribution may be uneven, the air circulation system of air curtains helps achieve temperature balance indoors.

Insulation function: Air curtains eliminate the need for constant opening and closing of doors in places frequented by customers, such as restaurants, shops, and entertainment venues. They can maintain indoor cold or warm air temperature with an efficiency of 60-80%, allowing only minimal temperature variations.
Insect prevention function: The majority of annoying and harmful insects are unable to pass through air curtains, making it easier to maintain hygiene in places such as fruit counters and fast-food restaurants.
Dust prevention function: Installing air curtains in precision mechanical factories or in the entrances of food or clothing stores facing busy roads can effectively shield the interior from dust, maintaining cleanliness at a level of 60-80%.
Preservation function: Air curtains can

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