Apparatus for wet processing substrate

1. A wet processing apparatus, comprising:

a conveyor configured for conveying a substrate;

a spraying system arranged opposite to the conveyor, the spraying system comprising

an upper spraying conduit and an upper spraying nozzle mounted on the upper spraying conduit, the upper spraying conduit being configured for supplying a wet processing liquid to the upper spraying nozzle, the upper spraying nozzle being configured for spraying the wet processing liquid to an upper side of the substrate; and

a suction system comprising a suction conduit and a suction nozzle connected to the suction conduit, the suction nozzle being adjacent to the conveyor and configured for suction the wet processing liquid sprayed on the substrate, the suction conduit being connected to and in communication with the upper spraying conduit in such a manner that the flowing of the wet processing liquid in the upper spraying conduit create a negative pressure in the suction conduit to enable the suction nozzle to suck the wet processing liquid sprayed by the upper spraying nozzle on the substrate, wherein the upper spraying conduit is perpendicular to the substrate on the conveyor, the suction conduit comprises a first suction tube connected to the upper spraying conduit and a second suction tube connected to the suction nozzle, the second suction tube is parallel to the upper spraying conduit, the first suction tube obliquely extends from the upper spraying conduit to the second suction tube, the upper spraying conduit comprises a first exporting tube and a second exporting tube coaxial with each other, the second exporting tube is connected between the first exporting tube and the upper spraying nozzle, the inside diameter of the first exporting tube decreases from the end distal from the second exporting tube to the other end connected to the second exporting tube, the inside diameter of the second exporting tube increases from the end connected to the first exporting tube to the other end connected to the upper spraying nozzle, and the first suction tube is connected to the second exporting tube.

2. The wet processing apparatus of claim 1 , further comprising a liquid supplying system, the liquid supplying system comprising a pump, a connecting channel system, and an upper supplying system, the pump being configured for pumping the wet processing liquid to the connecting channel system, the connecting channel system being in communication with the pump and the upper supplying system, the upper supplying system being in communication with the upper spraying conduit, and being configured for supplying the wet processing liquid to the upper spraying conduit.

3. The wet processing apparatus of claim 2 , further comprising a tank below the conveyor, the tank being configured for receiving the wet processing liquid, the pump being arranged in the tank and immerged in the wet processing liquid.

4. The wet processing apparatus of claim 3 , further comprising a housing above the tank, the spraying system, the suction system, the liquid supplying system, and portions of the conveyor being accommodated in the housing.

5. The wet processing apparatus of claim 2 , wherein the spraying system further comprises a lower spraying conduit and a lower spraying nozzle below the conveyor, the liquid supplying system further comprises a lower supplying system communicating with the connecting channel system, the lower spraying conduit communicates with the lower supplying system, the lower spraying nozzle is mounted on the lower spraying conduit and opposite to the upper spraying nozzle, the lower spraying nozzle is configured for spraying the wet processing liquid to a lower side of the substrate.

6. The wet processing apparatus of claim 1 , wherein a central axis of the first suction tube and a central axis of the second suction tube intersect at an acute angle.

7. The wet processing apparatus of claim 1 , wherein the largest inside diameter of the second exporting tube is less than that of the first exporting tube.

8. The wet processing apparatus of claim 1 , wherein the conveyor comprises a plurality of spaced upper rollers and a plurality of spaced lower rollers, the upper rollers are arranged along a direction of substrate conveyance, the lower rollers spatially correspond to the respective upper rollers, each of the lower rollers and the corresponding upper roller are configured for conveying a substrate therebetween.

9. The wet processing apparatus of claim 1 , wherein a central axis of the first suction tube and a central axis of the second suction tube intersect at an acute angle.

10. A wet processing apparatus, comprising:

a conveyor configured for conveying a substrate;

a spraying system arranged opposite to the conveyor, the spraying system comprising a plurality of upper spraying conduits and a plurality of upper spraying nozzles corresponding to the respective upper spraying conduits, each of the upper spraying conduits being a venturi tube, each of the upper spraying nozzles being mounted on a corresponding upper spraying conduit and being configured for spraying a wet processing liquid supplied by the corresponding upper spraying conduit to an upper side of the substrate; and

a suction system comprising a plurality of suction conduits corresponding to the respective spraying conduits and a plurality of suction nozzles corresponding to the respective suction conduits, the suction nozzles being adjacent to the conveyor and configured for suction the wet processing liquid sprayed on the substrate, each of the suction conduits being connected between and in communication with a corresponding upper spraying conduit and a corresponding suction nozzle in such a manner that when the wet processing liquid flows through the corresponding spraying conduit, a negative pressure in the suction conduit is created to enable the corresponding suction nozzle to suck the wet processing liquid sprayed by the upper spraying nozzle on the substrate, wherein the upper spraying conduits are perpendicular to the substrate on the conveyor, each of the suction conduits comprises a first suction tube connected to the corresponding upper spraying conduit and a second suction tube connected to the corresponding suction nozzle, the second suction tube is parallel to the corresponding upper spraying conduit, the first suction tube obliquely extends from the corresponding upper spraying conduit to the second suction tube, each of the upper spraying conduits comprises a first exporting tube and a second exporting tube coaxial with each other, the second exporting tube is connected between the first exporting tube and the corresponding upper spraying nozzle, the inside diameter of the first exporting tube decreases from the end distal from the second exporting tube to the other end connected to the second exporting tube, the inside diameter of the second exporting tube increases from the end connected to the first exporting tube to the other end connected to the corresponding upper spraying nozzle, and the first suction tube is connected to the second exporting tube.

11. The wet processing apparatus of claim 10 , further comprising a liquid supplying system, the liquid supplying system comprising a pump, a connecting channel system, and an upper supplying system, the pump being configured for pumping the wet processing liquid to the connecting channel system, the connecting channel system being in communication with the pump and the upper supplying system, the upper supplying system being in communication with the upper spraying conduits, and being configured for supplying the wet processing liquid to the upper spraying conduits.

12. The wet processing apparatus of claim 11 , further comprising a tank below the conveyor, the tank being configured for receiving the wet processing liquid, the pump being arranged in the tank and immerged in the wet processing liquid.

13. The wet processing apparatus of claim 12 , further comprising a housing above the tank, the spraying system, the suction system, the liquid supplying system, and portions of the conveyor being accommodated in the housing.

14. The wet processing apparatus of claim 11 , wherein the spraying system further comprises a plurality of lower spraying conduits and a number of lower spraying nozzles below the conveyor, the liquid supplying system further comprises a lower supplying system communicated with the connecting channel system, the lower spraying conduits each communicate with the lower supplying system, the lower spraying nozzles correspond to the lower spraying conduits respectively, and each are mounted on a corresponding lower spraying conduit, the lower spraying nozzles are configured for spraying the wet processing liquid to a lower side of the substrate.