Nonreturn valve for a compact ventilation system as well as compact ventilation system

1. A nonreturn valve for a compact ventilation system, the nonreturn valve comprising:

a recoil membrane comprising at least one mechanical stabilizing section, at least one opening section and a holding section, the at least one mechanical stabilizing section comprising a mechanical stabilizing section circumferential peripheral edge surface;

a holding element for holding the recoil membrane and for fastening the nonreturn valve on a flow duct of the compact ventilation system; and

at least one mechanical counter-stabilizing section associated with the holding element or associated with the flow duct of the compact ventilation system, wherein:

the mechanical stabilizing section circumferential peripheral edge surface is free of contact with the at least one mechanical counter-stabilizing section;

the at least one mechanical stabilizing section cooperates with the at least one mechanical counter-stabilizing section;

the at least one opening section provides a defined movement of the recoil membrane during an opening of the nonreturn valve; and

the holding section holds the recoil membrane at a counter-holding section of the holding element.

2. A nonreturn valve in accordance with claim 1 , wherein the holding element comprises a cylindrical, essentially disk-shaped, ring element-shaped configuration or comprises a basket element configuration with passages for flow of breathing air.

3. A nonreturn valve in accordance with claim 1 , wherein:

the mechanical stabilizing section comprises a segment of the recoil membrane or comprises two segments of the recoil membrane, which are located opposite each other in relation to a center of the recoil membrane; and

the counter-stabilizing section comprises at least one counter-segment of the holding element or at least one counter-segment of the flow duct of the compact ventilation system; and

the segment of the recoil membrane is in non-positive or positive-locking contact with the at least one counter-segment or the segments of the recoil membrane are in non-positive or positive-locking contact with the at least one counter-segment.

4. A nonreturn valve in accordance with claim 3 , wherein the at least one counter-segment of the holding element is configured as a longitudinal web or as two hooks projecting radially from a jacket surface of the cylindrical holding element.

5. A nonreturn valve in accordance with claim 1 , wherein:

the mechanical stabilizing section comprises at least one suspension element projecting from the recoil membrane;

the at least one suspension element is locked in at least one mechanical counter-suspension element of the holding element; and

the counter-suspension element is configured as a recess.

6. A nonreturn valve in accordance with claim 1 , wherein the mechanical stabilizing section comprises a web thickening of the recoil membrane.

7. A nonreturn valve in accordance with claim 1 , wherein:

the holding section of the recoil membrane comprises a suspension element, which projects from the recoil membrane and which locks into a counter-suspension element of the holding element and the counter-suspension element is configured as a recess; or

the holding section of the recoil membrane comprises a contact surface on one side of the recoil membrane, which contact surface is configured for the clamping contact with the counter-holding section of the holding element, which counter-holding section of the holding element is configured as a counter-contact surface.

8. A nonreturn valve in accordance with claim 1 , wherein the recoil membrane comprises two opening sections, which are arranged on two opposite sides of the recoil membrane in relation to the center of the recoil membrane.

9. A nonreturn valve in accordance with claim 1 , further comprising a tube element, wherein the holding element is non-positive or positive-locking fastenable to an inner jacket surface of the tube element, the mechanical stabilizing section circumferential peripheral edge surface facing in a direction of the inner jacket surface of the tube element.

10. A nonreturn valve in accordance with claim 9 , wherein:

a bolt is provided on an outer jacket surface of the holding element;

the tube element comprises a sliding block guide with an inner jacket surface, in which the bolt is lockable and guided.

11. A nonreturn valve in accordance with claim 1 , wherein:

the counter-holding section of the holding element comprises a counter-suspension element, which projects from the holding element and which is locked into a holding section of the recoil membrane;

said holding section is configured as a recess; and

the counter-suspension element has a width that is greater than the holding section configured as a recess, and which has a size equaling at least twice a size of the holding section configured as a recess.

12. A compact ventilation system comprising:

a fan;

a tube;

a flow duct for passing through breathing air to a patient, wherein the flow duct comprises a first opening connecting to the fan, a second opening connecting to the tube, a volume, an exhalation valve and a nonreturn valve, the nonreturn valve comprising:

a recoil membrane comprising at least one mechanical stabilizing section, at least one opening section and a holding section, the at least one mechanical stabilizing section comprising a mechanical stabilizing section circumferential peripheral edge surface;

a holding element for holding the recoil membrane and for fastening the nonreturn valve on the flow duct; and

at least one mechanical counter-stabilizing section associated with the holding element or associated with the flow duct, wherein:

the at least one mechanical stabilizing section cooperates with the at least one mechanical counter-stabilizing section;

the mechanical stabilizing section circumferential peripheral edge surface is free of contact with the at least one mechanical counter-stabilizing section;

the at least one opening section provides a defined movement of the recoil membrane during an opening of the nonreturn valve; and

the holding section holds the recoil membrane at a counter-holding section of the holding element.

13. A compact ventilation system in accordance with claim 12 , wherein the flow duct comprises the at least one mechanical counter-stabilizing section for cooperating with the at least one mechanical stabilizing section of the recoil membrane, wherein the mechanical stabilizing section circumferential peripheral edge surface never contacts the at least one mechanical counter-stabilizing section.

14. A compact ventilation system in accordance with claim 12 , wherein the at least one mechanical counter-stabilizing section is a projection directed towards the longitudinal axis of the flow duct, the tube comprising an inner jacket surface, the mechanical stabilizing section circumferential peripheral edge surface facing in a direction of the inner jacket surface of the tube element.

15. A compact ventilation system in accordance with claim 12 , further comprising a volume flow meter arranged facing the second opening in the flow duct, wherein the nonreturn valve is arranged facing the first opening in the flow duct, and the exhalation valve is arranged between the volume flow meter and the nonreturn valve in the flow duct.

16. A compact ventilation system in accordance with claim 15 , wherein the volume flow meter comprises a hot wire configured to carry out a hot wire anemometry process.

17. A compact ventilation system in accordance with claim 12 , wherein the holding element comprises a cylindrical, essentially disk-shaped, ring element-shaped configuration or comprises a basket element configuration with passages for flow of breathing air.

18. A compact ventilation system in accordance with claim 12 , wherein:

the mechanical stabilizing section comprises a segment of the recoil membrane or comprises two segments of the recoil membrane, which are located opposite each other in relation to a center of the recoil membrane;

the counter-stabilizing section comprises at least one counter-segment of the holding element or at least one counter-segment of the flow duct of the compact ventilation system; and

the segment of the recoil membrane is in non-positive or positive-locking contact with the at least one counter-segment or the segments of the recoil membrane are in non-positive or positive-locking contact with the at least one counter-segment.

19. A compact ventilation system in accordance with claim 12 , wherein:

the mechanical stabilizing section comprises at least one suspension element projecting from the recoil membrane;

the at least one suspension element is locked in at least one mechanical counter-suspension element of the holding element; and

the counter-suspension element is configured as a recess.

20. A compact ventilation system in accordance with claim 12 , wherein:

the holding section of the recoil membrane comprises a suspension element, which projects from the recoil membrane and which locks into a counter-suspension element of the holding element and the counter-suspension element is configured as a recess; or

the holding section of the recoil membrane comprises a contact surface on one side of the recoil membrane, which contact surface is configured for the clamping contact with the counter-holding section of the holding element, which counter-holding section of the holding element is configured as a counter-contact surface.