Device and method to detect the onset of fires

Abstract

A device for detecting an onset of a fire includes a detector for recognizing a fire parameter, at least one feed line having a suction opening, a fan that feeds air to the detector via the feed line, and a rubber-elastic part including a film disposed across an inside portion and defining a film opening having a smaller diameter than a diameter of the suction opening. The rubber-elastic part os disposed against the feed line in a gas-tight manner. In addition, a method for cleaning the device including blowing a gas stream from an inside of the film to an outside of the film through the film opening.

1 . A device for detecting an onset of a fire, the device comprising: 
 a detector configured to recognize a fire parameter;    at least one feed line having a suction opening with a first diameter;    a fan configured to feed air to the detector through the feed line;    a rubber-elastic part disposed in the suction opening in a gas-tight manner with respect to the feed line, the rubber-elastic part having an inside portion and a film disposed across the inside portion, the film defining a film opening with a second diameter smaller than the first diameter.    
   
   
       2 . The device as recited in  claim 1 , wherein the rubber-elastic part includes an inside edge disposed facing an inside of the feed line and an outside edge disposed facing an outside of the feed line, and wherein the film is disposed at the outer edge.  
   
   
       3 . The device as recited in  claim 1 , wherein the film includes a non-stick coating.  
   
   
       4 . The device as recited in  claim 1 , further comprising a filter configured to filter the air entering the film opening.  
   
   
       5 . The device as recited in  claim 4 , wherein the filter is disposed at the rubber-elastic part.  
   
   
       6 . The device as recited in  claim 4 , further comprising a ventilation extension disposed outside of the rubber-elastic part and wherein the filter is disposed at the ventilation extension.  
   
   
       7 . The device as recited in  claim 1 , wherein the rubber-elastic part defines a groove encircling an outer portion of the rubber-elastic part, the groove being disposed against the feed line in a gas-tight manner.  
   
   
       8 . A method for cleaning the device recited in  claim 1 , the method comprising: 
 moving a gas stream an inside of the film to an outside of the film through the film opening.