Device for controlling the temperature of objects

1. A device for tempering objects comprising:

a) a housing;

b) a tempering tunnel accommodated in the housing;

c) a tempering device for tempering objects using a tempered gaseous fluid, which comprises fluid nozzles through which a jet of fluid can be discharged into the tempering tunnel and onto objects in a first direction with a first directional component;

d) a suction system by means of which tunnel atmosphere can be suctioned through at least one suction opening, whereby a base current running from a top portion of the tempering tunnel to the bottom portion of the tempering tunnel is generated in the tempering tunnel in the direction of the at least one suction opening,

wherein

e) a convection device generating a convection current, which supports the base current, the convection device providing the convection current through one or more injector nozzles blowing gaseous fluid into the tempering tunnel towards the object in a second direction towards the at least one suction opening, the second direction having a second directional component which will intersect to the first directional component, the convection device being operable in two modes of operation, wherein

in a first mode of operation the tempered gaseous fluid is supplied to and discharged by the one or more injector nozzles, and

in a second mode of operation, tunnel atmosphere is supplied to the one or more injector nozzles and discharged by the one or more injector nozzles back into the tunnel.

2. The device according to claim 1 , wherein gaseous fluid can be blown into the tempering tunnel through the one or more injector nozzles with a directional component in the direction of the at least one suction opening.

3. The device according to claim 1 , wherein one or more injector nozzles are arranged on a side of the tempering tunnel which is opposite the at least one suction opening.

4. The device according to claim 3 , wherein the at least one suction opening is arranged on the floor and the one or more injector nozzles are arranged in an upper region adjacent or on the ceiling of the tempering tunnel.

5. The device according to claim 1 , wherein the one or more injector nozzles are connected to at least one outlet opening of the tempering tunnel by way of a circulating line and delivery means are present so that tunnel atmosphere can be delivered from the at least one outlet opening to the one or more injector nozzles.

6. The device according to claim 5 , wherein the at least one outlet opening is arranged radially adjacent to the one or more injector nozzles relative to a main axis of the latter.

7. The device according to claim 5 , wherein the at least one outlet opening is arranged on a side of the one or more injector nozzles which is opposite the discharge direction of the injector nozzle.

8. The device according to claim 1 , wherein the second directional component that is transverse to the first directional component.

9. The device according to claim 1 , wherein the fluid nozzles comprise at least two separate fluid nozzles, each of the two fluid nozzles being activatable and controllable independent of the other fluid nozzle.

10. The device according to claim 1 , wherein the fluid nozzles and the one or more injector nozzles are positioned within the tempering tunnel.

11. The device according to claim 10 , wherein the one or more injector nozzles are positioned within the tempering tunnel opposite the at least one suction opening.

12. The device according to claim 11 , wherein the second direction has a directional component towards the at least one suction opening.

13. A device for tempering objects comprising:

a) a housing;

b) a tempering tunnel accommodated in the housing;

c) a tempering device comprising a plurality of fluid nozzles through which a jet of fluid can be discharged into the tempering tunnel in a first direction;

d) a suction system by means of which tunnel atmosphere can be suctioned through at least one suction opening formed in a floor of the tempering tunnel, whereby a base current is generated in the tempering tunnel in the direction of the at least one suction opening,

e) a convection device comprising at least one injector nozzle located in an upper region adjacent or on the ceiling of the tempering tunnel, the at least one injector nozzle blowing gaseous fluid into the tempering tunnel towards the at least one suction opening in a second direction, the second direction intersecting the first direction,

f) at least one outlet opening, the at least one outlet opening being positioned radially adjacent the at least one injector nozzle, the at least one outlet opening being coupled to the at least one injector nozzle by a circulating line, wherein

in a first mode of operation the tempered gaseous fluid is supplied to and discharged by the at least one injector nozzle, and

in a second mode of operation, tunnel atmosphere exiting the tunnel through the at least one outlet opening is supplied to the at least one injector nozzle through the circulating line and discharged by the at least one injector nozzle back into the tunnel.

14. The device of claim 13 , wherein the at least one outlet opening is arranged on a side of the at least one injector nozzle which is opposite the discharge direction of the injector nozzle.