Delaval Holding Ab

Lars Kall

Magnus Lidman

Carolus Marinus Bernard Versteijnen

A method and system for controlling the cooling of small milk quantities in a cooling tank ( ) having a bottom wall portion ( ) with a milk cooling surface ( &prime;) within the tank being part of a cooling circuit an agitator ( ) within the tank for stirring the milk therein. The gist of the invention is a) providing an element for measuring the milk quantity in the tank, and a temperature transducer ( ) for monitoring the milk temperature in the tank, b) providing, in the cooling circuit, an evaporator ( ) connected to the bottom wall portion of the tank, a compressor ( ), and a condenser ( ), c) controlling the temperature of the refrigerant in the evaporator by regulating the vaporizing pressure, so that the temperature of the milk cooling surface ( &prime;) is always higher than 0&deg; C. when the compressor ( ) is running, d) monitoring the milk quantity in the tank, and, when sufficient/insufficient for the agitator to work properly.

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Stockholm, Sweden

Lars Kall