The core working principle of an air curtain lies in its built-in high-speed fan that sucks in ambient air and accelerates it through an optimized air outlet grille to form a dense, uniform air wall covering the entire doorway cross-section. This invisible air partition cuts off the exchange of indoor and outdoor air masses effectively. For cold storage and refrigeration supporting scenarios, it can prevent cold air from leaking out of the warehouse when doors open and block external hot humid air from entering, reducing the frequent startup frequency of refrigeration units and lowering overall power consumption of the cold chain system. For shopping malls, restaurants and office buildings with central air conditioning, it prevents conditioned air from escaping, stabilizing indoor constant temperature and cutting down HVAC operating costs.
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