FIELD: air-conditioning in refrigerating compartments at negative temperatures. SUBSTANCE: humidifier includes air supercharger connected with it and Laval nozzle provided with swirler at inlet and injection unit at outlet and arranged in refrigerating compartment. Injection unit is made in form of ultrasonic source with rod-type longitudinal oscillation concentrator having axial passage in its body communicated with pipe union fitted in zero shift line concentrator and connected with water reservoir via proportioner. EFFECT: enhanced efficiency. 2 cl, 2 dwg
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