Humidifier and evaporation mat contained therein

F - Mech Eng,Light,Heat,Weapons – 24 – F

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Details

F24F 6/04 (2006.01) C08G 59/10 (2006.01) C08G 73/02 (2006.01) D06M 13/419 (2006.01) D06M 15/59 (2006.01) D06M 15/61 (2006.01) D06N 3/12 (2006.01)

Patent

CA 2641847

Devices for the evaporation of liquid, in particular water, have an evaporation mat which is wetted with the liquid and on which the liquid evaporates. The evaporation mat comprises a textile fabric (1) having fibres, wherein the surface of the fibres is coated with a covering (2) which comprises a cured reaction product of a polyamine and a polyalkylene glycol etherified with end groups of the structure X-CH2[CH(OR)]WCH2-, in which structure w is an integer from 0 to 1 and, when w is 0, X is a halogen, and, when w is 1, X is halogen and R is hydrogen, or X and R together are -O-. Preferably, the evaporation mat is a consolidated nonwoven which contains fibres made of a synthetic thermoplastic which are bonded to one another by means of a thermoplastic hotmelt glue at their intersection points. The devices are used for air humidification, for concentrating solutions, or for evaporative cooling.

L'invention concerne des dispositifs pour l'évaporation d'un liquide, notamment de l'eau, comprenant un tapis d'évaporation qui est humidifié par le liquide et au niveau duquel l'évaporation du liquide a lieu. Le tapis d'évaporation présente une surface textile (1) avec des fibres, la surface des fibres étant enduite d'un film de protection (2), constitué d'un produit durci de réaction entre une polyamine et un polyalkylène glycol éthérifié avec des groupements terminaux de structure X-CH2 [CH (OR) ] wCH2, w représentant un nombre entier compris entre 0 et 1 et, quand w vaut 0, X représentant un halogène, et quand w vaut 1, X représentant un halogène et R un hydrogène ou X et R représentant ensemble -O-. Le tapis d'évaporation est de préférence un non-tissé résistant, contenant des fibres d'une matière thermoplastique synthétique, reliées les unes aux autres à leurs intersections par un adhésif thermofusible. Les dispositifs sont utilisés pour l'humidification de l'air, pour la concentration de solutions ou pour l'évaporation par refroidissement.

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