Patent ID: 8584473

Claim:
Cooling equipment comprising: a) a cooling agent storage container housing a cooling agent; b) a cooling agent supply line connected to the cooling agent storage container for supplying the cooling agent to a non-recirculating cooling chamber, said cooling chamber having an open bottom with an opening to cool an item positioned adjacent the opening of the cooling chamber; c) a heater with an adjustable first heating performance for heating the cooling agent supplied to the cooling chamber, the heater integrated in the cooling agent supply line; d) an evaporator in the cooling agent storage container with an adjustable second heating performance for evaporating the cooling agent present in the cooling agent storage container; e) a first temperature sensor for measuring a chamber temperature in the cooling chamber; f) a second temperature sensor for measuring an agent temperature of the cooling agent supplied to the cooling chamber; and g) a controller for temperature control, the controller having an input side and an output side, the input side connected to the first temperature sensor and the second temperature sensor, the output side connected to the heater and the evaporator, wherein the controller: (i) is adapted to detect several temperatures as control variables; (ii) is a multiple controller adjusting the first heating performance and the second heating performance as manipulated variables.