A cleaning device includes a box body, a cleaning nozzle that ejects cleaning liquid toward a paint gun, an air nozzle hole that is configured to eject air toward the paint gun, and an eaves portion that protrudes more toward a central axis line of the insertion hole than the air nozzle hole. A method of cleaning the paint gun includes ejecting cleaning liquid from the cleaning nozzle toward the paint gun. In the ejecting, air is ejected toward the paint gun from the air nozzle hole.

A waste liquid scattering prevention device includes a box body having an upper wall being formed with an insertion hole into which a tip portion of a paint gun is inserted, and an air ejection port that ejects air along an inner wall of the box body. A waste liquid scattering prevention method includes an arrangement step of inserting the tip portion of a paint gun into an insertion hole, a cleaning step of cleaning the paint gun, and an air ejecting step of ejecting air from an air ejection port along the inner wall of the box body.

A waste liquid scattering prevention device includes a box body having an upper wall being formed with an insertion hole into which a tip portion of a paint gun is inserted, and an air ejection port that ejects air along an inner wall of the box body. A waste liquid scattering prevention method includes an arrangement step of inserting the tip portion of a paint gun into an insertion hole, a cleaning step of cleaning the paint gun, and an air ejecting step of ejecting air from an air ejection port along the inner wall of the box body.

Provided are a head life evaluation apparatus and method capable of evaluating lifespans of nozzles by using a plurality of chambers having different environments, the head life evaluation apparatus including a head block including at least one first nozzle for ejecting a treatment liquid in an inkjet manner, and a chamber block detachably coupled to the head block and including at least one first chamber corresponding to the first nozzle to evaluate a lifespan of the first nozzle in a first environment.

Provided are a head life evaluation apparatus and method capable of evaluating lifespans of nozzles by using a plurality of chambers having different environments, the head life evaluation apparatus including a head block including at least one first nozzle for ejecting a treatment liquid in an inkjet manner, and a chamber block detachably coupled to the head block and including at least one first chamber corresponding to the first nozzle to evaluate a lifespan of the first nozzle in a first environment.

A substrate processing apparatus includes: a processing chamber in which a substrate is processed with a processing liquid; a nozzle having a discharge port from which the processing liquid is discharged, the discharge port being formed in a distal end portion of the nozzle; a nozzle bath including an accommodation chamber formed therein, wherein the distal end portion of the nozzle is accommodated in the accommodation chamber at a standby time at which the processing liquid is not supplied to the substrate; a circulation line configured to return the processing liquid, which is discharged from the nozzle to the nozzle bath, to the nozzle; and a first restraint part configured to restrain a gas from flowing between an outside of the nozzle bath and the processing liquid present inside the nozzle bath when the processing liquid discharged from the nozzle to the nozzle bath is circulated to the nozzle.

A reservoir dispenser for a bidet washing apparatus includes a reservoir dispenser body having one or more reservoir dispenser chambers. One or more reservoir dispenser inlets are fluidically connectable to the one or more of the one or more reservoir dispenser chambers. In addition, one or more reservoir dispenser outlets are fluidically connectable to the one or more of the one or more reservoir dispenser chambers.

A method of generating a building assembly that includes spraying a coating material onto a plurality of pieces of substrate disposed on a first assembly face. The spraying includes spraying the coating material onto the plurality of pieces of substrate via a sprayer configured to apply the coating material to a target surface via a nozzle coupled with a mobile storage container storing the coating material, the coating material impregnating voids of the substrate. The method also includes allowing the coating material impregnating the voids to dry and harden and become rigid to generate the building assembly.

A method of generating a building assembly that includes spraying a coating material onto a plurality of pieces of substrate disposed on a first assembly face. The spraying includes spraying the coating material onto the plurality of pieces of substrate via a sprayer configured to apply the coating material to a target surface via a nozzle coupled with a mobile storage container storing the coating material, the coating material impregnating voids of the substrate. The method also includes allowing the coating material impregnating the voids to dry and harden and become rigid to generate the building assembly.

A fluid dispenser, comprising a dispenser faceplate having at least one ejection port and a dispenser guard. The dispenser guard has at least one opening configured to allow fluid exiting from the ejection port to flow through and at least one drainage structure. The dispenser guard is spaced from the ejection port with a gap small enough to attract the fluid accumulated around the ejection port to flow into the drainage structure.