Helical movement device

Abstract

A frozen confection dispenser including a reservoir for receiving and holding a product to be dispensed, an evaporator with cylindrical cooling element, a movement device including a helical element arranged to rotate concentrically externally of a cooling element in such a way as to advance the product along the longitudinal axis of the cooling element, a driver engaged with the movement device for the rotation thereof, and a dispenser for dispensing of the product, wherein the helical element has an angle of attack of less than 60° relative to the longitudinal axis of the cylinder. A helical element and a method for dispensing frozen confection with a dispenser are also disclosed.

The invention claimed is: 
     
       1. A frozen confection dispenser comprising:
 a reservoir for receiving and holding a product to be dispensed; 
 an evaporator with a cylindrical cooling element; 
 a movement device comprising a helical element arranged to rotate concentrically externally of the cylindrical cooling element in such a way as to advance the product along a longitudinal axis of the cylindrical cooling element; 
 a driver engaged with the movement device for rotation of the movement device; 
 a dispenser for dispensing the product; and 
 the helical element has an angle of attack α of less than 60° relative to the longitudinal axis of the cylindrical cooling element, the angle of attack α is an angle of inclination of the helical element relative to the longitudinal axis of the cylindrical cooling element, wherein the helical element has between 0.25 and 1.5 turns over a length of the cylindrical cooling element, and the helical element is arranged with a clearance distance to the cylindrical cooling element between 0.1 and 3.0 mm. 
 
     
     
       2. The frozen confection dispenser according to  claim 1 , wherein the helical element has an angle of attack α between 45° and 50° relative to the longitudinal axis of the cylindrical cooling element. 
     
     
       3. The frozen confection dispenser according to  claim 1 , wherein the helical element has a flight with a high of 6 to 12 mm and a thickness of 0.3 to 15 mm. 
     
     
       4. The frozen confection dispenser according to  claim 1 , wherein the cylindrical cooling element is from 100 to 500 mm long. 
     
     
       5. The frozen confection dispenser according to  claim 1 , wherein the helical element is free of scraper elements dragging along a surface of the cylindrical cooling element. 
     
     
       6. The frozen confection dispenser according to  claim 1 , wherein a cooling capacity of the cylindrical cooling element is between 0.05 and 1.0 kW. 
     
     
       7. The frozen confection dispenser according to  claim 1 , wherein a length of the helical element corresponds substantially to the length of the cylindrical cooling element or is longer than the length of the cylindrical cooling element or extends through a full length of the reservoir. 
     
     
       8. The frozen confection dispenser according to  claim 7 , wherein the helical element is longer than the cylindrical cooling element, and an extension element is provided between an end of the cylindrical cooling element and an end of the helical element to displace at least a portion of the product that has not been cooled. 
     
     
       9. The frozen confection dispenser according to claim 1, wherein the reservoir is adapted to comprise from 1 to 10 liters of the product. 
     
     
       10. The frozen confection dispenser according to claim 1, wherein the dispenser comprises a valve with a removable piston. 
     
     
       11. The frozen confection dispenser according to  claim 1 , wherein the helical element extends from 120 to 520 mm along a length of a longitudinal axis of the helical element and the helical element has an internal diameter from 80 to 160 mm.