Method and device for supervision and control of a heat generator with pulsating combustion

Abstract

The invention covers a method and a device for supervision and control of a heat generator with pulsating combustion. The amplitude of the sound generated during the operation of the heat generator is sensed by means of a sensor ( 25 ), and the initiation means ( 17, 17 A, 22 ) or electrical operative system of the heat generator is shut down, when the amplitude reaches a predetermined value, which indicates that the heat generator operates, or falls outside a predetermined area, which indicates that the operation of the heat generator is defective.

What is claimed is:  
     
         1 . A method for supervision and control of a heat generator with pulsating combustion, characterized in that the amplitude of the sound generated during the operation of the heat generator and/or the gas pressure is sensed and that the initiation means ( 17 ,  17 A,  22 ) or electrical operative system of the heat generator is shut down, when the amplitude reaches a predetermined value or falls outside a predetermined area, respectively.  
     
     
         2 . A method according to  claim 1 , characterized in that the shut down occurs with a delay.  
     
     
         3 . A method according to  claim 1  at a heat generator comprising a Helmholtz resonator with a resonant chamber ( 13 ) arranged as a combustion chamber, a pulse tube ( 14 ) connected to the combustion chamber at one of its ends, a decoupler ( 23 ) with an exhaust pipe ( 24 ) being connected to its other end, an inlet chamber ( 18 ) with an initiation blower ( 22 ), a valve ( 20 ) controlled by the pulse pressure in the combustion chamber for regulating the connection ( 19 ) between the inlet chamber and the combustion chamber, a device ( 15 ,  16 ) for injecting fuel in the combustion chamber, and an ignition device ( 17 ,  17 A) for igniting the fuel, characterized in that the amplitude in the inlet chamber ( 18 ) is sensed and that the ignition device ( 17 ,  17 A) and possibly the initiation blower ( 22 ) are shut down, when the amplitude reaches a predetermined value.  
     
     
         4 . A supervising and controlling device for carrying out the method according to  claim 1  at a heat generator with pulsating combustion, characterized by an electronic circuit device ( 26 - 29 ) for emitting a signal for shutting down the initiation means or a signal for shutting down the electrical operative system of the heat generator at the receipt from a sensor ( 25 ) of an amplitude signal over a predetermined value or outside a predetermined area, respectively.  
     
     
         5 . A device according to  claim 4 , characterized in that the electronic circuit device ( 26 - 29 ) is supplemented with a delay circuit ( 30 ).  
     
     
         6 . A device according to  claim 4 , characterized in that the electronic circuit device ( 26 - 29 ) is supplemented by a unit ( 31 ) for adaption to a so-called fire controller for the heat generator.  
     
     
         7 . A device according to  claim 6 , characterized in that the electronic circuit device ( 26 - 29 ) has a so-called phantom feed ( 33 ) of current from the fire controller.  
     
     
         8 . A device according to any of claims  4 - 7  at a heat generator comprising a Helmholtz resonator with a resonant chamber ( 13 ) arranged as a combustion chamber, a pulse tube ( 14 ) connected to the combustion chamber at one of its ends, a decoupler ( 23 ) with an exhaust pipe ( 24 ) being connected to its other end, an inlet chamber ( 18 ) with an initiation blower ( 22 ), a valve ( 20 ) controlled by the pulse pressure in the combustion chamber for regulating the connection between the inlet chamber and the combustion chamber, a device ( 15 ,  16 ) for injecting fuel in the combustion chamber, and an ignition device ( 17 ,  17 A) for igniting the fuel in the combustion chamber, characterized in that the sensor ( 25 ) is arranged in the inlet chamber ( 18 ) and that the initiation means comprise the ignition device ( 17 ,  17 A) and the initiation blower ( 22 ).  
     
     
         9 . A device according to  claim 8 , characterized in that a pressure connection ( 25 ′) of the sensor ( 25 ) has a snorkel ( 33 ), which extends down to the bottom of the inlet chamber ( 18 ).