Method and device for cooling a mass of a substance

Details Method and device for cooling a mass of a substance Method and device for cooling a mass of a substance

A - Human Necessities

23

L

A23L 3/375 (2006.01) A23B 4/06 (2006.01) A23B 7/04 (2006.01) F25D 3/10 (2006.01)

Patent

CA 2462138

The present invention relates to a method and a device for cooling a mass of a, for example, meat-, tissue-, vegetable- and/or fruit-containing substance in a container (2), in particular a mixer, blender or mill (3, 4), using liquefied nitrogen (N2) which is supplied in the lower region of the container (2) at a constant working pressure via at least one nozzle. The method according to the invention and the device according to the invention are distinguished in that, during the cooling process and/or in stoppage times, the nitrogen is briefly supplied to the nozzle (7) or, via the latter, into the container (2) by means of at least one pressure pulse which is increased in relation to the working pressure. The pulsed supply of pressurized nitrogen blows blocked and/or iced-up nozzles (7) free again and thus advantageously ensures a more reliable operation of cooling a mass of a substance. The present invention is suitable, in particular, for use in foodstuff technology.

L'invention se rapporte à un procédé et à un dispositif de refroidissement d'une masse, par exemple, de substance contenant de la viande, du tissu, des légumes et/ou des fruits dans un contenant (2), plus particulièrement, dans un mélangeur ou un broyeur (3 ;4) au moyen d'azote liquéfié (N¿2?) qui alimente la zone inférieure du contenant (2) à une pression d'utilisation constante à travers au moins un bec. Le procédé et le dispositif selon l'invention se caractérisent par le fait que, au cours du processus de refroidissement et/ou au cours des temps d'interruption, l'azote est rapidement acheminé vers le bec (7) ou, grâce à ce dernier, dans le contenant (2) au moyen d'au moins une pulsation de pression qui augmente en fonction de la pression d'utilisation. L'alimentation à impulsion d'azote pressurisé libère à nouveau, par injection d'air, les becs (7) bloqués et/ou gelés, ce qui garantit considérablement un fonctionnement plus sûr du refroidissement d'une masse de substance. L'invention en question convient tout particulièrement dans la technologie des produits alimentaires.

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