Adjustable orifice for use in an air conditioning system, in particular an aircraft air conditioning system

An adjustable orifice for use in an air conditioning system, such as an aircraft air conditioning system, the adjustable orifice comprising:

• a first orifice element which has an orifice frame as well as a first orifice area, wherein when the orifice is assembled at a duct of the air conditioning system, the first orifice area of the first orifice element leaves open a part of a cross section of the duct,
• a second orifice element which has a second orifice area, wherein when the adjustable orifice is assembled at the duct, the second orifice area of the second orifice element leaves open a part of the cross section of the duct, and wherein the second orifice element is connected to the first orifice element so as to be rotatable about an axis, such that the second orifice area of the second orifice element is rotatable relative to the first orifice area of the first orifice element in order to set a desired flow cross section in the duct,
• a third orifice element which has a third orifice area, wherein when the adjustable orifice is assembled at the duct, the third orifice area of the third orifice element leaves open a part of the cross section of the duct, and wherein the third orifice element is connected to the first and the second orifice elements so as to be rotatable about an axis, such that the third orifice area of the third orifice element is rotatable relative to the first orifice area of the first orifice element and relative to the second orifice area of the second orifice element in order to set a desired flow cross section in the duct, and
• a driver device which is formed along at least one of the second orifice element and the third orifice element, wherein the driver device is shaped and positioned so that when the third orifice area of the third orifice element rotates relative to the first orifice area of the first orifice element, the second orifice area of the second orifice element is driven and therefore likewise rotated relative to the first orifice area of the first orifice element, or positioned so that when the second orifice area of the second orifice element rotates relative to the first orifice area of the first orifice element, the third orifice area of the third orifice element is driven and therefore likewise rotated relative to the first orifice area of the first orifice element.