Patent ID: 7549184

Claim:
An adding liquid machine with presettable quantity, comprising: a washer extractor, a spray apparatus which sprays chemicals on a garment therein is provided on said washer extractor; an adding chemicals container; a first measuring apparatus for measuring the amount of chemicals contained in said adding chemicals container; a microprocessor; wherein said adding chemicals container is connected fluidly with said spray apparatus through a first chemical pump; wherein said microprocessor is operable to calculate an amount of chemicals to be sprayed inside said washer extractor based on (a) a manual input indicative of a garment quantity and (b) a predetermined bath liquid ratio; and wherein said microprocessor is operable to calculate a surplus chemicals amount discharged from said washer extractor by subtracting a chemical amount absorbed by the garment as calculated based on a wet pick up ratio from a total chemicals amount added to said washer extractor.