What is an air curtain?

Air curtain is driven by a high-speed motor through the flow or centrifugal wind wheel produced by the strong airflow, forming "invisible curtain".

The indoor and outdoor are divided into two independent temperature areas to create a comfortable indoor environment, maintain indoor air conditioning, purify indoor air, save electricity, make the air flow, can effectively isolate dust, smoke, smell, insects and microorganisms, etc..In order to prevent the cold (or warm) air from flowing out, can save electricity, effectively prevent the cold (warm) gas leakage.Indoor and outdoor air can be divided into two independent temperature zones.Auxiliary circulation can adjust the temperature when the air conditioner is running for a long time.

define

The American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) defines an air door as follows: "In the simplest applications, an air curtain is a continuous broad flow of air circulating at the entrance to an air-conditioned space.It reduces the penetration of insects and unconditional air by forcing air through the entire entryway into the air-conditioned space.The airflow layer moves at a speed and Angle so that any air attempting to penetrate the curtain is trapped.The air curtain is effective in preventing infiltration through the inlet generally 60% to 80% ".

The Air Movement and Control Association defines an air curtain as "a directionally controlled airflow that moves over the entire height and width of the opening, which reduces the penetration or transfer of air from one side of the opening to the other and/or inhibits the passage of flying insects, dust or debris".

With or without wind curtain.

Following the laws of physics, the photohot air on the left side of the image rises through natural convection and escapes to the cooler side, while heavier, unheated cold air flows through the floor from the outside.Since air tends to balance temperature and pressure, and the warm interior is not protected from external heat, the air mixes and we don't see two separate hot areas.In this case, we wasted a lot of energy, and the heater couldn't keep the inner area comfortable.

The air curtain's air ejector is placed at the top to clearly distinguish the warm areas of the two hot zones.The air curtain maintains the internal environment on the left side of the image at a warm and comfortable temperature, preventing cold air from penetrating from the outside.In the second case, the air curtain saves up to 80 percent of the energy of the heater placed on the left wall.

Important: Poorly designed curtains, incorrectly selected units (underpowered), or improperly installed units can lose some or all of their advantages and are worse than unprotected doors.