Method for disinfecting air in air ducts

Abstract

The invention relates to a method and a device for disinfecting the air of an air flow ( 2 ) inside an air supply duct ( 1 ) with a nontoxic disinfectant. The disinfectant is sprayed and injected in the injection direction ( 31 ) by means of at least one injection nozzle ( 30 ) of an injection device ( 3 ), the injection direction ( 31 ) approximately corresponding to the direction of the air flow ( 2 ). The injection in the region located after a contraction ( 12 ) in the duct and the related flow acceleration enables an absorption of the particles on the inner walls ( 100 ) of the air supply duct ( 1 ), over the entire length of the air supply duct ( 1 ).

1 . A method for disinfecting the air of an air flow ( 2 ) in an air supply duct ( 1 ), in particular of an air-conditioning system with a non-toxic disinfectant,
 wherein   atomisation of the disinfectant into particles and injection of the particles by means of at least one injection nozzle ( 30 ) of an injection device ( 3 ) in an injection direction ( 31 ), wherein the injection direction ( 31 ) corresponds approximately to the direction of the air flow ( 2 ), and   distribution of the particles of the disinfectant in the air flow ( 2 ), and   subsequent adsorption of the particles to the inner walls ( 100 ) can be achieved over the entire length of the air supply duct ( 1 ).   
     
     
         2 . A method for disinfecting the air of an air flow ( 2 ) in an air supply duct ( 1 ), in particular of an air-conditioning system with a disinfectant, wherein the air is ionised in the duct, at least the disinfectant particles in the air are electrically charged, while the duct walls are kept at earth potential, so that the charged particles are deposited more rapidly onto the duct walls,
 wherein   atomisation of the disinfectant into particles and injection of the particles by means of at least one injection nozzle ( 30 ) of an injection device ( 3 ) in an injection direction ( 31 ), wherein the injection direction ( 31 ) corresponds approximately to the direction of the air flow ( 2 ), and distribution of the particles of the disinfectant in the air flow ( 2 ) and subsequent deposition of the particles on the inner walls ( 100 ) is achieved over the entire length of the air supply duct ( 1 ).   
     
     
         3 . The method for disinfecting air according to  claim 1 , wherein the injected disinfectant behaves in a retentive manner. 
     
     
         4 . The method for disinfecting air according to  claim 1 , wherein the injection takes place in a region downstream of a narrowed portion ( 12 ) and thus an acceleration in flow, wherein the pressure (p 1 ) downstream of the flow acceleration is greater than the pressure (p 2 ) in the region of the narrowed portion ( 12 ). 
     
     
         5 . The method for disinfecting air according to  claim 3 , wherein the acceleration in flow is achieved by the arrangement of the injection device ( 3 ) inside the air supply duct ( 1 ). 
     
     
         6 . The method for disinfecting air according to  claim 3 , wherein the acceleration in flow is achieved by a curvature of the air supply duct ( 1 ), wherein the injection device ( 3 ) is arranged on the side of the smaller radius in the exit region of the curve. 
     
     
         7 . The method for disinfecting air according to  claim 3 , wherein the acceleration in flow is achieved by a chicane ( 5 ) which is arranged inside the air supply duct ( 1 ). 
     
     
         8 . The method according to  claim 1 , wherein a biocide product, in particular comprising a proportion of lactic acid, vitamin C and a proportion of citric acid is used as the disinfectant. 
     
     
         9 . A device for disinfecting air according to the method according to  claim 1 , wherein at least one injection nozzle ( 30 ) is provided on the injection device ( 3 ), which can be supplied with a disinfectant via a pipeline ( 9 ) and a pump ( 10 ) from a reservoir ( 11 ). 
     
     
         10 . The device according to  claim 9 , wherein the atomised and injected amount of the disinfectant can be varied in a controlled manner by a regulation device ( 8 ) by means of electrical lines ( 7 ).