A device for cleaning and drying a spraying unit, the device containing: a top end and a bottom end; the top and bottom end connected to each other by a housing; the housing having an opening proximate the top end, for receiving at least a portion of a spraying unit; a first liner within the housing; a second liner within the first liner; the first liner fitting within the housing forming a space between an outside wall of the first liner and an inside wall of the housing; the second liner fitting within the first liner forming a space between an outside wall of the second liner and an inside wall of the first liner; the opening further containing an open cap, proximate the top end; the device having at least one vacuum air supply influent port, at least one drying air supply influent port and at least one solvent supply influent port.

The present invention discloses an integrated new technique and apparatus for recycling volatile organic compounds of coating printing. The new technique collects a mixed gas of volatile organic compounds produced in the process of coating and drying of a coating machine with a volatiles collecting hood of coating machine, compresses and lead the mixed gas of volatile organic compounds into a condensation system for condensation; the obtained condensate enters a gas-liquid separator to obtain a coating solvent with high concentration; non-condensable lean gas enters a membrane separation and enrichment system to obtain a mixed gas of high concentration organic compounds after membrane separation and enrichment with a complete set of membrane assembly, and then returns to front of the condensation system to repeat the integrated technique. The separation membrane as claimed in the present invention has an extremely high permselectivity for volatile organic compounds of coating printing and can quickly enrich the volatile organic compounds. Recycling rate of volatile organic compounds of the apparatus may reach 90%, and the content of organic compounds in the tail gas emission after treatment is no more than 1 g/m.sup.3. This integrated new technique largely reduces the production cost of coating printing industry and at the same time protects the atmospheric environment.

The present invention discloses an integrated new technique and apparatus for recycling volatile organic compounds of coating printing. The new technique collects a mixed gas of volatile organic compounds produced in the process of coating and drying of a coating machine with a volatiles collecting hood of coating machine, compresses and lead the mixed gas of volatile organic compounds into a condensation system for condensation; the obtained condensate enters a gas-liquid separator to obtain a coating solvent with high concentration; non-condensable lean gas enters a membrane separation and enrichment system to obtain a mixed gas of high concentration organic compounds after membrane separation and enrichment with a complete set of membrane assembly, and then returns to front of the condensation system to repeat the integrated technique. The separation membrane as claimed in the present invention has an extremely high permselectivity for volatile organic compounds of coating printing and can quickly enrich the volatile organic compounds. Recycling rate of volatile organic compounds of the apparatus may reach 90%, and the content of organic compounds in the tail gas emission after treatment is no more than 1 g/m.sup.3. This integrated new technique largely reduces the production cost of coating printing industry and at the same time protects the atmospheric environment.

To reduce an influence of a flow of ambient atmosphere and the like on flying of a droplet ejected from a nozzle of an inkjet head. To exhaust vapor of a solvent contained in a coated film while reducing an influence on flying of the droplet. An exhaust device for inkjet coating includes: a cover that covers at least a target range on an object to be coated, the target range being a range in which a droplet lands that is ejected from an ejection nozzle of an inkjet head to a surface of the object to be coated; a closing member that closes a gap between the cover and the object to be coated around the target range; an external communication portion through which a compartment surrounded by the cover, the object to be coated, and the closing member communicates with an outside; and an exhaust mechanism configured to exhaust air from the compartment.

To reduce an influence of a flow of ambient atmosphere and the like on flying of a droplet ejected from a nozzle of an inkjet head. To exhaust vapor of a solvent contained in a coated film while reducing an influence on flying of the droplet. An exhaust device for inkjet coating includes: a cover that covers at least a target range on an object to be coated, the target range being a range in which a droplet lands that is ejected from an ejection nozzle of an inkjet head to a surface of the object to be coated; a closing member that closes a gap between the cover and the object to be coated around the target range; an external communication portion through which a compartment surrounded by the cover, the object to be coated, and the closing member communicates with an outside; and an exhaust mechanism configured to exhaust air from the compartment.

A device for detecting and replenishing a salt solution in a salt spray machine and the salt spray machine includes a salt solution collector installed at the bottom of the salt spray machine and configured to collect the salt solution, a return pipe is connected to the salt solution collector and the salt solution storage tank, and a pH value sensor, a water level sensor and the salt concentration sensor are connected to the salt solution storage tank.

A device for detecting and replenishing a salt solution in a salt spray machine and the salt spray machine includes a salt solution collector installed at the bottom of the salt spray machine and configured to collect the salt solution, a return pipe is connected to the salt solution collector and the salt solution storage tank, and a pH value sensor, a water level sensor and the salt concentration sensor are connected to the salt solution storage tank.

An improved cleaner for paint spray guns in use on an assembly line comprises a vessel having an inlet, a drain and a port for receiving an atomizer of a spray gun. An impeller is rotatably mounted within the vessel in fluid communication with the inlet. The impeller has an offset cleaning nozzle for projecting a cleaning spray towards the port, a rotational nozzle for projecting a rotational spray to effect rotation of the impeller. The impeller also has an independently controlled central nozzle cleaning nozzle. The cleaner has an air wipe down for removing excess solvent from the atomizer of the spray gun as it leaves the cleaner following a wash cycle. The cleaner comprises a helical flushing means and a solvent purge assembly to clean the inner walls of the vessel. An air and solvent separation fitting provides improved solvent drainage efficiency.

An improved cleaner for paint spray guns in use on an assembly line comprises a vessel having an inlet, a drain and a port for receiving an atomizer of a spray gun. An impeller is rotatably mounted within the vessel in fluid communication with the inlet. The impeller has an offset cleaning nozzle for projecting a cleaning spray towards the port, a rotational nozzle for projecting a rotational spray to effect rotation of the impeller. The impeller also has an independently controlled central nozzle cleaning nozzle. The cleaner has an air wipe down for removing excess solvent from the atomizer of the spray gun as it leaves the cleaner following a wash cycle. The cleaner comprises a helical flushing means and a solvent purge assembly to clean the inner walls of the vessel. An air and solvent separation fitting provides improved solvent drainage efficiency.

To reduce an influence of a flow of ambient atmosphere and the like on flying of a droplet ejected from a nozzle of an inkjet head. To exhaust vapor of a solvent contained in a coated film while reducing an influence on flying of the droplet. An exhaust device for inkjet coating includes: a cover that covers at least a target range on an object to be coated, the target range being a range in which a droplet lands that is ejected from an ejection nozzle of an inkjet head to a surface of the object to be coated; a closing member that closes a gap between the cover and the object to be coated around the target range; an external communication portion through which a compartment surrounded by the cover, the object to be coated, and the closing member communicates with an outside; and an exhaust mechanism configured to exhaust air from the compartment.