Valve, in particular for a device for administering a liquid medicament, and a corresponding device for administering a liquid medicament

1. A valve for a device for administering a liquid medicine, having a valve body which has an inner space for receiving a liquid, wherein the valve body has a liquid inlet and an opposite liquid outlet, which both open out into the inner space, wherein a plurality of microchannels is arranged in the inner space, said plurality of microchannels extending in a connection direction between the liquid inlet and the liquid outlet, wherein the plurality of microchannels are formed by a grid made of parallel, rod-shaped boundary elements, or of several parallel layers of said grid that are arranged offset in relation to one another,

wherein the entirety of said parallel, rod-shaped boundary elements in the valve body are arranged in the inner space; and

wherein the inner space, the liquid inlet and the liquid outlet have the same cross-sectional area perpendicular to the connection direction.

2. The valve according to claim 1 , in which each of the plurality of microchannels have a diameter between 1 μm and 200 μm.

3. The valve according to claim 2 , in which each of the plurality of microchannels have a diameter between 5 μm and 20 μm.

4. The valve according to claim 1 , in which the boundary elements extend perpendicularly to the connection direction between the liquid inlet and the liquid outlet.

5. The valve according to claim 1 , in which a length of the boundary elements is between 20% and 80% of a diameter of the inner space perpendicular to the connection direction between the liquid inlet and the liquid outlet, wherein the boundary elements extend starting from an inner side of a side wall bordering the inner space of the valve body toward an opposite side wall, without reaching this, such that a spacing between the boundary elements and the opposite side wall is formed.

6. The valve according to claim 1 , in which the boundary elements have a round or a polygonal cross-section.

7. The valve according to claim 6 , wherein the boundary elements have a circular cross-section.

8. The valve according to claim 1 , in which the inner space, the liquid inlet and the liquid outlet have the same cross-sectional area perpendicular to the connection direction.

9. The valve according to claim 8 , in which the valve body has a constant cross-section across its entire length between the liquid inlet and the liquid outlet.

10. The valve according to claim 1 in which the valve body has parallel side walls, whose inner sides border the inner space, wherein the side walls open out into the liquid inlet or the liquid outlet on opposite ends.

11. The valve according to claim 1 , in which the valve body has a round or a polygonal cross-section.

12. The valve according to claim 11 , in which the valve body has a circular cross-section.

13. The valve according to claim 1 , in which, to increase the adhesion between the boundary elements and a liquid, a surface of the boundary elements has a functional coating.

14. The valve according to claim 13 , wherein the functional coating is a hydrophilic coating.

15. The valve according to claim 1 , wherein the cross-sectional area ratio between the microchannels and the inner space is between 1:5 and 1:1000.

16. The valve according to claim 1 , wherein the cross-sectional area ratio between the microchannels and the inner space is between 1:50 and 1:100.

17. The valve according to claim 1 , wherein the boundary elements have a diameter between 0.5 μm and 50 μm.

18. The valve according to claim 1 , wherein the boundary elements have a diameter between 3 μm and 15 μm.

19. The valve according to claim 1 , wherein the valve is produced by means of micro-injection moulding.

20. The valve according to claim 1 , wherein the valve is produced by means of silicon etching methods.

21. The valve according to claim 1 , wherein in the absence of an applied pressure, the liquid is held stationary within the valve body, and when the applied pressure exceeds a threshold amount, the liquid is transported out of the valve body.

22. The valve according to claim 1 , wherein the threshold amount is the maximum Laplace pressure for the valve body.

23. A device for administering a liquid medicine, having a reservoir, in which a medicine is held or can be held, and having a pump, which has a pump chamber, which is fluidically connected to the reservoir via a one-way valve that is only transmissive in a direction from the reservoir into the pump chamber, and that is fluidically connected to a medicine outlet via a valve according to claim 1 .