Air exchange device for buildings

Abstract

Air exchange device for buildings, comprising: an elongated casing; a heat exchanger housed inside said casing; and a first fan unit and a second fan unit arranged to generate respective airflows in a relationship of mutual heat exchange in said heat exchanger, wherein the first and the second fan units each comprise at least one electric fan having a hollow support casing having an intake opening and a discharge opening, wherein a duct for the passage of an airflow is defined within said support casing, which contains an electric motor that drives a rotor; a damping elastic support of low-density polymeric material housed inside said casing, wherein said electric fans of said fan units are supported in a freely floating manner within their respective seats formed within said damping elastic support.

1 . Air exchange device for buildings, comprising:
 an elongated casing subdivided in a longitudinal direction in a first end zone, a second end zone with a central zone arranged between the first and the second end zones, the casing having an internal inlet opening and an internal outlet opening located in the first end zone, and an external inlet opening and an external outlet opening located in the second end zone;   a heat exchanger housed within said casing and located in said central zone, wherein the heat exchanger has a first inlet in communication with the internal inlet opening, a first outlet in communication with the external outlet opening, a second inlet in communication with the external inlet opening and a second outlet in communication with the internal outlet opening;   a first fan unit arranged to generate a first airflow directed from the internal inlet opening towards the external outlet opening and a second fan unit arranged to generate a second airflow directed from the external inlet opening towards the internal outlet opening, wherein the first and the second airflows are in a relationship of mutual heat exchange in said heat exchanger, and wherein the first and the second fan units comprise respective electric fans, having a hollow support casing having an intake opening and a discharge opening; and   a damping elastic support of low-density polymeric material, housed inside said casing and located in said second end zone of the casing , wherein said electric fans of said fan units are supported in a freely floating manner inside said damping elastic support, wherein an inlet duct and an outlet duct are formed within said damping elastic support having respective openings facing the external inlet opening and the external outlet opening, respectively, and wherein said inlet and outlet ducts have respective edges in contact with said second inlet and with said first outlet, respectively, of said heat exchanger.   
     
     
         2 . Device according to  claim 1 , wherein said elastic support comprises two half-shells in contact with each other along respective edges. 
     
     
         3 . Device according to  claim 1 , wherein said damping elastic support comprises respective seats which receive the support casings of the respective fans with shape coupling. 
     
     
         4 . Device according to  claim 1 , wherein said electric fans are fixed to respective weighting elements configured to increase the vibrational mass of the electric fans. 
     
     
         5 . Device according to  claim 4 , wherein said weighting elements are formed from metal plates. 
     
     
         6 . Device according to  claim 5 , wherein said electric fans are centrifugal fans with an axial intake opening and a tangential discharge opening and wherein said weighting elements are applied on respective flat faces of the fans opposite to the respective discharge openings. 
     
     
         7 . Device according to  claim 1 , wherein each of said fan units comprises two electric fans in parallel to each other.