Channel element, channel element system for a ventilation system, and building envelope equipped with said channel element system

1. A channel element for a ventilation system, wherein the channel member has a first opening (O 1 ), a second opening (O 2 ) and a channel wall extending between them enclosing a channel section, wherein the channel element has an envelope section ( 10 ; 20 ; 30 ; 40 ; 50 ; 60 ) assigned to a tubular section ( 25 ; 35 ; 45 ; 55 ; 65 ) that wraps around said tubular section and thermally insulates said tubular section and wherein said tubular section is a flexible corrugated tube having a flexible inner skin which has a water-vapor barrier.

2. The channel element according to claim 1 , wherein said corrugated tube and/or the inner skin is formed from a polymer material.

3. The channel element according to claim 1 , wherein the envelope section ( 10 ; 20 ; 30 ; 40 ; 50 ; 60 ) has a first partial shell ( 11 ; 21 ; 31 ; 41 ; 51 ; 61 ) and a second partial shell ( 12 ; 22 ; 32 ; 42 ; 52 ; 62 ) that fully surround said tubular section ( 25 ; 35 ; 45 ; 55 ; 65 ) along the circumferential direction of said tubular section.

4. The channel element according to claim 1 , wherein the envelope section has an inorganic fibrous material.

5. The channel element according to claim 1 , wherein the tubular section ( 25 ; 35 ; 65 ) has a tubular-section cross-section with two axes of symmetry orthogonal to each other.

6. The channel element according to claim 1 , wherein the tubular section ( 65 ) and the envelope section ( 10 ; 60 ) are each a straight section, or the tubular section ( 25 ; 35 ; 45 ; 55 ) and the envelope section ( 20 ; 30 ; 40 ; 50 ) are each a curved section, whose bending angle amounts to 45° or 90°.

7. The channel element according to claim 5 , wherein the tubular section ( 25 ) and the envelope section ( 20 ) are each a first curved section that is located in a first bending plane that contains a first axis of symmetry, wherein said first axis of symmetry runs along the longest diameter line of the tubular section cross-section, or the tubular section ( 35 ) and the envelope section ( 30 ) and wherein the first axis of symmetry is a second curved section that is located in a second bending plane that contains a second axis of symmetry running along the shortest diameter line of the tubular section cross-section.

8. The channel element according to claim 1 , wherein the tubular section ( 45 ; 55 ) and the envelope section ( 40 ; 50 ) are each a transition section, wherein the first opening ( 01 ) has a first tubular cross-section and a second opening ( 02 ) has a second tubular cross-section.

9. A channel element system for a ventilation system, wherein said channel element system is built from the individual channel elements according to claim 1 arranged in series.

10. The channel element system according to claim 9 , wherein the joints of tubular sections adjacent to each other and the joints of envelope sections adjacent to each other are identical along the channel longitudinal direction.

11. The channel element system according to claim 9 , wherein the joints of tubular sections adjacent to each other and the joints of envelope sections adjacent to each other are offset along the channel longitudinal direction, wherein the joints of the tubular sections and the joints of the envelope sections are offset wherein said offset is ⅕ to ½ of the length of a channel element along the channel longitudinal direction.

12. A building envelope that contains the channel element system of claim 9 .

13. The building envelope according to claim 12 , wherein it contains a channel region running essentially horizontal, wherein the horizontally running channel region extends along the whole circumference of a footprint of the building.

14. The building envelope according to claim 12 , wherein the building is a multi-story building, wherein the channel system has a plurality of horizontally running channel regions vertically offset to each other.

15. The channel element of claim 4 wherein said inorganic fibrous material is rock wool, glass wool, or combinations thereof.

16. The channel element of claim 5 wherein the two axes of symmetry orthogonal to each other are a square, oval, elliptical cross-section, a square cross-section having rounded corners, a racetrack-like cross-section having two straight sides that are parallel and opposite each other and two semi-circular sides opposite each other, or combinations thereof.

17. The channel element of claim 8 wherein said first tubular cross-section is a circular cross-section, a square cross-section, or combinations thereof.

18. The channel element of claim 8 wherein said second tubular cross-section is rectangular, oval, elliptical cross-section, square cross-section with rounded corners, a racetrack-like cross-section having two straight sides that are parallel and opposite each other and two semi-circular sides opposite each other, or combinations thereof.

19. A channel element for said ventilation system according to claim 1 or 9 , wherein said channel member has a first opening ( 01 ), a second opening ( 02 ) and a channel wall extending between them enclosing a channel section, wherein the channel element has an envelope section ( 25 ; 35 ; 45 ; 55 ; 65 ) assigned to said tubular section ( 25 ; 35 ; 65 ) that wraps around it and thermally insulates it at least in sections ( 10 ; 20 ; 30 ; 40 ; 50 ; 60 );

wherein said tubular section ( 25 ; 35 ; 65 ) has a tubular-section cross-section with two axes of symmetry orthogonal to each other; and

wherein said tubular-section cross-section is square, oval, elliptical, square having rounded corners, racetrack-like having two straight sides that are parallel and opposite each other and two semi-circular sides opposite each other, or combinations thereof.