Humidity and/or Heat-Exchange Device

Abstract

The invention relates to a humidity- and/or heat-exchange device, for example a plate heat exchanger a sorption rotor, an adsorption dehumidifying rotor or the similar, provided with humidity- and/or heat exchange surfaces which make it possible to introduce humidity and/or heat into a fluid flow and/or to remove them therefrom and/or to exchange said humidity and/or heat between fluid flows. The inventive device is also provided with a coating, which makes it possible to cover said humidity and heat exchange surfaces and consists of a zeolithe material and a bonding agent. In order to improve the performance of the humidity- and/or heat-exchange device, the zeolithe material is embodied in the form of a synthetic nano-zeolithe consisting of particles whose size is <1000 nm.

1 . A humidity and/or heat exchange device, e.g. a plate heat exchanger, a sorption rotor, an adsorption dehumidifying rotor or the like, provided with humidity and/or heat exchange surfaces that make it possible to introduce humidity and/or heat into a fluid flow and/or to remove them therefrom and/or to exchange the humidity and/or heat between fluid flows, and with a coating with which the humidity and heat exchange surfaces are coated and that consists of a zeolite material and a bonding agent, characterized in that the zeolite material is formed as synthetic nano-zeolite having a particle size of <1000 nm. 
     
     
         2 . The humidity and/or heat exchange device according to  claim 1 , wherein the nano-zeolite is selected such that it has a homogeneous pore size distribution with a pore diameter of <1.5 nm, preferably 0.4 nm. 
     
     
         3 . The humidity and/or heat exchange device according to  claim 1  wherein the particles of the zeolite material are present in a nano-crystalline form. 
     
     
         4 . The humidity and/or heat exchange device according to  claim 1  wherein the thickness of the coating is 0.2 to 100, preferably 1 to 2 μ (10 −6 m). 
     
     
         5 . The humidity and/or heat exchange device according to  claim 1  wherein the humidity and/or heat exchange surfaces of which are made of paper materials and-that are impregnated with a suspension containing the synthetic nano-zeolite. 
     
     
         6 . The humidity and/or heat exchange device according to  claim 5 , wherein, after its impregnation with or in the suspension containing the synthetic nano-zeolite, consists of at least 30, preferably 40 to 80% by weight of nano-zeolite material. 
     
     
         7 . The humidity and/or heat exchange device, preferably according  claim 1  wherein the bonding agent contains dispersion adhesives, such as e.g. acrylate brines, to which colloidal SiO 2  can be added.