Structure of a gas-valve unit

1. A gas valve unit for adjusting a volumetric gas flow which is fed to a gas burner of a gas device, said gas valve unit comprising:

a valve chamber;

an actuation shaft protruding out of the valve chamber;

at least two on/off valves arranged in the valve chamber; and

at least one restrictor plate arranged in the valve chamber and having at least two restrictor points, each of the restrictor points having at least one restrictor opening, said restrictor plate being accessible from a side of the valve chamber on which the actuation shaft is protruding from the valve chamber,

wherein the valve chamber has a plurality of plates arranged parallel to one another, one of the plates being formed by the restrictor plate, and

one of the plates is formed by a valve sealing plate which forms valve seats of the on/off valves.

2. The gas valve unit of claim 1 , wherein the gas device is a gas cooking device.

3. The gas valve unit of claim 1 , wherein the restrictor plate is replaceable.

4. The gas valve unit of claim 1 , further comprising a covering removably arranged on the side of the valve chamber on which the actuation shaft protrudes from the valve chamber, said restrictor plate being accessible by removing the covering.

5. The gas valve unit of claim 1 , wherein the valve sealing plate is made from a flexible material.

6. The gas valve unit of claim 5 , wherein the flexible material is plastic.

7. The gas valve unit of claim 1 , wherein the valve sealing plate has an opening in a region of a valve seat of each on/off valve, said opening being closed, when the on/off valve is closed and a shut-off body of the on/off valve sits on the valve sealing plate.

8. The gas valve unit of claim 1 , further comprising a permanent magnet for actuation of the on/off valves.

9. The gas valve unit of claim 8 , wherein the permanent magnet is configured to impose a force for movement of shut-off bodies of the on/off valves.

10. The gas valve unit of claim 1 , further comprising a pressure plate made from substantially rigid material and arranged on a side of the valve sealing plate facing away from shut-off bodies of the on/off valves.

11. The gas valve unit of claim 10 , wherein the pressure plate is made of metal.

12. The gas valve unit of claim 10 , wherein the valve sealing plate has an opening in a region of a valve seat of each on/off valve, said pressure plate having openings corresponding to the openings in the valve sealing plate.

13. The gas valve unit of claim 12 , further comprising a first gas distribution plate arranged between the pressure plate and the restrictor plate, said first gas distribution plate having openings corresponding to the openings in the pressure plate and to the restrictor openings in the restrictor plate.

14. The gas valve unit of claim 13 , further comprising a second gas distribution plate arranged on a side of the restrictor plate facing away from the first gas distribution plate, said second gas distribution plate having openings corresponding to the restrictor openings in the restrictor plate.

15. The gas valve unit of claim 14 , further comprising a covering arranged on the side of the valve chamber on which the actuation shaft protrudes from the valve chamber, said second gas distribution plate and said covering forming a structural unit.

16. The gas valve unit of claim 15 , wherein the second gas distribution plate and the covering form a separable structural unit.

17. The gas valve unit of claim 12 , wherein the valve sealing plate and the pressure plate and the first gas distribution plate form a non-separable structural unit.

18. A gas valve unit for adjusting a volumetric gas flow which is fed to a gas burner of a gas device, said gas valve unit comprising:

a valve chamber;

an actuation shaft protruding out of the valve chamber;

at least two on/off valves arranged in the valve chamber;

at least one restrictor plate arranged in the valve chamber and having at least two restrictor points, each of the restrictor points having at least one restrictor opening, said restrictor plate being accessible from a side of the valve chamber on which the actuation shaft is protruding from the valve chamber; and

a permanent magnet for actuation of the on/off valves,

wherein the valve chamber has a plurality of plates arranged parallel to one another, said permanent magnet being arranged on a side of the on/off valves facing away from the plates.

19. The gas valve unit of claim 18 , further comprising a covering removably arranged on the side of the valve chamber on which the actuation shaft protrudes from the valve chamber, said restrictor plate being accessible by removing the covering.

20. A gas valve unit for adjusting a volumetric gas flow which is fed to a gas burner of a gas device, said gas valve unit comprising:

a valve chamber;

an actuation shaft protruding out of the valve chamber;

at least two on/off valves arranged in the valve chamber;

at least one restrictor plate arranged in the valve chamber and having at least two restrictor points, each of the restrictor points having at least one restrictor opening, said restrictor plate being accessible from a side of the valve chamber on which the actuation shaft is protruding from the valve chamber; and

a permanent magnet for actuation of the on/off valves,

wherein the permanent magnet is spaced away from the actuation shaft in a radial direction and is coupled to the actuation shaft in such a manner that a rotation of the actuation shaft causes a movement of the permanent magnet relative to the on/off valves.

21. The gas valve unit of claim 20 , further comprising a covering removably arranged on the side of the valve chamber on which the actuation shaft protrudes from the valve chamber, said restrictor plate being accessible by removing the covering.