Plate heat exchanger with a refrigerant distributor

Details Plate heat exchanger with a refrigerant distributor Plate heat exchanger with a refrigerant distributor

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 39/02 (2006.01) F25B 41/06 (2006.01) F28F 9/22 (2006.01) F28F 13/00 (2006.01) F28F 27/02 (2006.01)

Patent

CA 2166395

A device is disclosed for distributing a two-phase refrigerating medium mass flow in a plate evaporator. The evaporator has a distribution channel at the inlet side which may receive a refrigerating medium mass flow coming from an expansion valve and several mutually spaced exchanger channels which branch off from the distribution channel in a substantially perpendicular direction. In order to ensure a uniform distribution of the refrigerant medium mass flow among the exchanger channels, a porous body is arranged in the distribution channel between the refrigerating medium inlet and the branch-off points of the exchanger channels. The porous body is advantageously arranged in an outer throttle insert which extends over at least part of the length of the distribution channel and in whose wall are located additional throttle openings that lead to the exchanger channels.

L'invention concerne un dispositif permettant de répartir un flux massique d'agent frigorigène diphasique dans un évaporateur à plaques (12). L'évaporateur comporte un canal de distribution (14) côté admission, pouvant être alimenté par un flux massique d'agent frigorigène provenant d'une soupape de détente (10), et plusieurs canaux échangeurs (16) répartis à distance les uns des autres le long du canal de distribution (14) et dérivés sensiblement perpendiculairement dudit canal de distribution (14). Afin d'assurer une répartition homogène du flux volumique d'agent frigorigène (28') au niveau des canaux échangeurs (16), un corps poreux (38) est disposé dans le canal de distribution (14) entre l'admission d'agent frigorigène (26) et les points de dérivation des canaux échangeurs (16). Le corps poreux est disposé avantageusement dans une pièce rapportée d'étranglement (32) extérieure qui s'étend au moins sur une partie de la longueur du canal de distribution, dans la paroi de laquelle se trouvent des ouvertures d'étranglement (34) supplémentaires menant aux canaux échangeurs (16).

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