Ventilation device comprising a first outlet and a second outlet

Abstract

The present invention relates to a ventilation device ( 1 ) comprising a first air duct ( 2 ) for air supply and a second air duct ( 3 ) for air supply. The first air duct ( 2 ) comprises a first outlet ( 4 ) for air flow and the second air duct ( 3 ) comprises a second outlet ( 5 ) for air flow, where the first outlet ( 4 ) is arranged to admit passage for a predefined amount of air per time unit (F-i). The second outlet ( 5 ) comprises a controllable choke device ( 6 ) that is arranged to either take a first position that admits passage for a predefined amount of air per time unit (F 3 ) or a second position that does not admit passage of air. The ventilation device ( 1 ) comprises a control unit ( 7 ) and at least one detector ( 8, 9 ), where the control unit ( 7 ) is arranged to control the controllable choke device ( 6 ) in dependence of input data from said detector ( 8, 9 ) such that demand controlled ventilation is obtained.

1 - 10 . (canceled) 
     
     
         11 . A ventilation device comprising a first air duct for air supply and a second air duct for air supply, where the first air duct comprises a first outlet for air flow and the second air duct comprises a second outlet for air flow, where the first outlet is arranged to admit passage for a predefined amount of air per time unit, where the second outlet comprises a controllable choke device that is arranged to either take a first position that admits passage for a predefined amount of air per time unit or a second position that does not admit passage of air, where the ventilation device comprises a control unit and at least one detector, where the control unit is arranged to control the controllable choke device in dependence of input data from said detector such that demand controlled ventilation is obtained, wherein the control unit is arranged to control the choke device to shift between the first position and the second position with a periodicity such that the first position is taken during a first period of time and the second position is taken during a second period of time, such that a pulsating air flow is acquired at the second outlet. 
     
     
         12 . The ventilation device according to  claim 11 , wherein each detector is arranged to detect at least one of temperature, air humidity, carbon dioxide content, motions and presence. 
     
     
         13 . (canceled) 
     
     
         14 . The ventilation device according to  claim 13 , wherein the control unit is arranged to control the choke device such that the first period of time is constant while the second period of time is controllably variable, such that the first position is taken during constant periods of time with controllably variable periodicity. 
     
     
         15 . The ventilation device according to  claim 13 , wherein the control unit is arranged to control the choke device such that the first period of time is controllably variable such that the first position is taken during controllably variable periods of time with a constant periodicity. 
     
     
         16 . (canceled) 
     
     
         17 . A method for controlling air supply via a first outlet for air flow and a second outlet for air flow, where the first outlet admits passage for a predefined amount of air per time unit, wherein the method comprises the steps:
 detecting at least one parameter in a space, where said parameter is related to the air quality in the space; and   controlling a choke device at the second outlet in dependence of said detection such that the choke device either takes a first position that admits passage for a predefined amount of air per time unit or a second position that does not admit passage of air such that a demand controlled ventilation is obtained, where the control of the choke device results in a shift between the first position and the second position with a periodicity, such that the first position is taken during a first period of time and the second position is taken during a second period of time, such that a pulsating air flow is acquired at the second outlet.   
     
     
         18 . The method according to  claim 16 , wherein said detection refers to at least one of temperature, air humidity, carbon dioxide content, motions and presence. 
     
     
         19 . (canceled) 
     
     
         20 . The method according to  claim 16 , wherein the control of the choke device results in that the first period of time is constant while the second period of time is controllably variable, such that the first position is taken during constant periods of time with a controllably variable periodicity. 
     
     
         21 . The method according to  claim 16 , wherein the control of the choke device results in that the first period of time is controllably variable such that the first position is taken during controllably variable periods of time with a constant periodicity.