Discharge grille and an air curtain device

Abstract

The invention relates to a blow-out grid, the peripheral form and dimensions of which correspond to an elongate form of a blow-out opening of an air curtain device. This blow-out grid comprises slats which extend in use longitudinally and transversely relative to the lengthwise direction of the blow-out grid and which guide in a desired uniform direction respective transversely and longitudinally diverging components of an airflow passing therethrough. The invention further relates to an air curtain device, comprising: a housing; means generating an airflow in the housing; an elongate blow-out opening with an inner peripheral form; a channel between the means generating an airflow and the blow-out opening; and a blow-out grid arranged in the blow-out opening and having a peripheral form and dimensions corresponding to the elongate form of the blow-out opening, and wherein the blow-out grid is one from the group comprising blow-out grids.

1 . Blow-out grid, the peripheral form and dimensions of which correspond to an elongate form of a blow-out opening of an air curtain device, which blow-out grid comprises slats which extend in use longitudinally and transversely relative to the lengthwise direction of the blow-out grid and which guide in a desired uniform direction respective transversely and longitudinally diverging components of an airflow passing therethrough. 
   
   
       2 . Blow-out grid as claimed in  claim 1 , wherein the longitudinal and the transverse slats form sets positioned one above the other. 
   
   
       3 . Blow-out grid as claimed in  claim 1 , wherein at least some of the longitudinal and the transverse slats are connected to each other in order to form a unified whole. 
   
   
       4 . Blow-out grid as claimed in  claim 1 , wherein the transverse slats have a design associated with the longitudinal divergence of the airflow other than the design of the longitudinal slats associated with the transverse divergence of the airflow. 
   
   
       5 . Blow-out grid as claimed in  claim 1 , wherein the distance between the transverse slats is greater than the distance between the longitudinal slats. 
   
   
       6 . Blow-out grid as claimed in  claim 1 , wherein at least one of the transverse and the longitudinal slats have in cross-section a form adapted to the relevant component of the airflow passing therethrough during use. 
   
   
       7 . Blow-out grid as claimed in  claim 6 , wherein during use the slats are disposed at an angle to the vertical. 
   
   
       8 . Blow-out grid as claimed in  claim 6 , wherein at least during use the slats comprise a curvature. 
   
   
       9 . Blow-out grid as claimed in  claim 1 , wherein the edges of the slats oriented in a blow-out direction are given a straight form transversely of the blow-out direction, against vortex shedding and against noise nuisance. 
   
   
       10 . Blow-out grid as claimed in  claim 1 , wherein at least some of the longitudinal and the transverse slats are mutually engaging in order to provide a connection therebetween. 
   
   
       11 . Blow-out grid as claimed in  claim 1 , wherein at least some of the longitudinal and the transverse slats are disposed at a distance from each other. 
   
   
       12 . Blow-out grid as claimed in  claim 11 , wherein the distance is substantially smaller than the width or height of the wider or higher of the longitudinal and the transverse slats. 
   
   
       13 . Blow-out grid as claimed  claim 1 , wherein at least one of the longitudinal or transverse slats has a form and/or orientation varying from perpendicular to the exit direction of the airflow out of the blow-out grid. 
   
   
       14 . Air curtain device, comprising:
 a housing;   means generating an airflow in the housing;   an elongate blow-out opening with an inner peripheral form;   a channel between the means generating an airflow and the blow-out opening; and   a blow-out grid arranged in the blow-out opening and having a peripheral form and dimensions corresponding to the elongate form of the blow-out opening, and wherein the blow-out grid is one from the group comprising blow-out grids as claimed in  claim 1 .   
   
   
       15 . Air curtain device as claimed in  claim 14 , wherein the means generating an airflow are of a type which generates at least at the position of the blow-out grid an airflow having a longitudinal component as well as a transverse component. 
   
   
       16 . Air curtain device as claimed in  claim 14 , wherein the means generating an airflow are of the type known as a radial fan with blades curved to the rear, which by definition generates at least at the position of the blow-out grid the airflow also comprising a longitudinal component as well as a transverse component. 
   
   
       17 . Air curtain device as claimed in  claim 16 , wherein at least two radial fans with blades curved to the rear are disposed in an orientation parallel to the blow-out opening and to the blow-out grid therein.