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A mathematical model for the adsorption refrigerator unit operation has been proposed, considering sorption kinetics and hydraulic resistance of vapour tubes. As the result of the experimental studies sorption isotherms and kinetic curves for activated granular carbon CKT, carbon fiber adsorbents, zeolite and water have been obtained. A criterion for the refrigerant quantity determination for filling up the refrigerator unit has been proposed. The paper shows the possibility of effective control over refrigerating capacity of the adsorption refrigerators and of the provision of uniform heat removal from the evaporator by a corresponding choice of hydraulic drag of a vapor tube.