Dispenser for a flowable product with a first gaseous propellant and a quantity of the product mixed with a second propellant

摘要

A dispenser for a flowable product such as liquid soap is arranged to receive a can containing the liquid soap as well as two different propellants. Gaseous nitrogen under pressure acts as a primary propellant, while propane and/or butane in a liquid phase act to foam the soap when it is released from the can. An electronically controlled valve (14) is actuated when a sensor detects the presence of a user's hand adjacent an outlet (20), and a predetermined quantity of foamed soap is then dispensed.