Spraying device and use thereof

A spraying device comprising:

• a conveyer comprising a mesh crawler belt configured to carry an object to be sprayed;
• a baking chamber for heating the object to be sprayed;
• a spraying chamber inside of which is disposed at least four atomizing nozzles, the at least four atomizing nozzles configured to uniformly spray a coating solution on all surfaces of the object to be sprayed;
• a cleaning chamber for cleaning the mesh crawler belt and recycling the coating solution carried by the mesh crawler belt;
• and
• a solution storage apparatus for storing the coating solution that the spraying chamber needs for spraying;
• wherein the mesh crawler belt passes successively through the baking chamber, the spraying chamber and the cleaning chamber;
• wherein the spraying chamber further comprises a spraying chamber casing, a hollow shaft freely movably mounted on the spraying chamber casing, an exhaust outlet and a cleaner outlet;
• the hollow shaft configured to transport the coating solution;
• the exhaust outlet provided at a top part of the spraying chamber casing configured to remove a coating solution which is not adhered to the object to be sprayed;
• and the cleaner outlet provided at a bottom part of the spraying chamber casing configured to discharge a cleaning solution formed in the spraying chamber;
• and
• wherein the at least four atomizing nozzles comprise at least two rotary siphon atomizing nozzles that are configured to spray an upper surface, a lower surface, a front surface and a rear surface of the object to be sprayed;
• the at least two rotary siphon atomizing nozzles mounted on the hollow shaft;
• one part of the at least two rotary siphon atomizing nozzles located above the mesh crawler belt and another part located below the mesh crawler belt;
• the at least four atomizing nozzles further comprise at least two fixed siphon atomizing nozzles respectively mounted on side walls of the spraying chamber, and the at least two fixed siphon atomizing nozzles configured to spray two side surfaces of the object to be sprayed.