VACUUM WASHING MACHINE (VERSIONS) Russian patent published in 2000 - IPC

FIELD: equipment for washing textile articles by boiling washing liquid at temperature below boiling temperature of this liquid at atmospheric pressure. SUBSTANCE: washing machine has hermetically sealed washing tank, vacuum pump, condenser and regulating valve which are interconnected by pipeline. Pump inlet is communicated with washing tank cavity, vacuum pump outlet is connected to inlet of condenser whose outlet is connected to regulating valve inlet and inlet is connected to washing tank inner cavity. Steam pumped out by vacuum pump is further used for washing, i.e. machine has closed washing cycle, so that steam is directed from vacuum pump back into washing tank, with heat energy being transferred to washing liquid. To prolong washing time without employing heating device, steam condensation energy is transferred to washing liquid in washing tank. Pressure differences between condenser and regulating valve may be leveled by using receiver. Temperature of washing liquid in washing tank may be regulated by heating device. EFFECT: increased efficiency, simplified construction and reduced power consumption. 4 cl, 3 dwg