Device and method for emulsifying liquid or solid products, in particular food products such as milk or ice cream

A device for emulsifying liquid or solid products, in particular food products, comprising

• a pump comprising at least one suction duct adapted for sucking a product to be emulsified and an emulsifying gas, and
• a delivery duct adapted for dispensing an emulsion obtained from said product to be emulsified and from said emulsifying gas,
• wherein said pump comprises a double worm screw arranged between said suction duct and said delivery duct, said double worm screw being adapted for emulsifying said product and said gas to obtain said emulsion and for pushing at least one of said product, said gas and said emulsion with a flow parallel to an axis of the screws of said double worm screw from said suction duct to said delivery duct, wherein the double worm screw comprises a pair of worm screws having diameters and profiles different from each other;
• wherein said device further comprises cooling means associated with said pump in an area comprised between said suction duct and said delivery duct and adapted for cooling at least one of said product, said gas and said emulsion present in said area of said pump comprised between said suction duct and said delivery duct;
• wherein said pump comprises a casing made of a heat-conducting material, said cooling means being embedded in said casing;
• wherein the cooling means is integrated within said casing so that any point of the entire external surface of the cooling means is in direct contact with the casing.