Abstract: A part subjected to cleaning is cleaned or rinsed with a cleaning agent or rinsing agent having a nonaqueous type solvent or a hydrophilic solvent as a main component thereof. Then the cleaning agent or rinsing agent adhering to the cleaned or rinsed part subjected to cleaning is removed with a cleaning agent having perfluorocarbon as a main component thereof or the vapor of the cleaning agent. The part is subsequently dried. Otherwise, after the part subjected to cleaning has been cleaned with an aqueous type solvent or wash with water, the part is cleaned and dried with a cleaning agent having perfluorocarbon as a main component thereof or the vapor of the cleaning agent. The cleaning agent having perfluorocarbon as a main component thereof or the vapor of the cleaning agent can be used for cleaning or rinsing the part subjected to cleaning.

Abstract: An object to be cleaned is cleaned with an cleaning agent which mixes a base cleaning agent such as silicon-containing cleaning agent or an isoparaffin containing cleaning agent with a surfactant or a hydrophilic solvent to promote the cleaning power. The object is rinsed with the base cleaning agent alone after it goes through the first cleaning step as described above. Then, this is followed by the finishing treatment by the use of hot air or steam drying. The base cleaning agents can be recovered and recycled, improving economy in the case with the use of two or more cleaning agents in combination. The excellent properties of degreasing and dewatering, comparable to those of flon system, can be obtained using a mixture of silicon-containing or isoparaffin-containing cleaning agents with surfactants and hydrophilic solvents and maintaining safety in environment.

Abstract: An object to be cleaned is cleaned with an cleaning agent which mixes a base cleaning agent such as silicon-containing cleaning agent or an isoparaffin containing cleaning agent with a surfactant or a hydrophilic solvent to promote the cleaning power. The object is rinsed with the base cleaning agent alone after it goes through the first cleaning step as described above. Then, this is followed by the finishing treatment by the use of hot air or steam drying. The base cleaning agents can be recovered and recycled, improving economy in the case with the use of two or more cleaning agents in combination. The excellent properties of degreasing and dewatering, comparable to those of flon system, can be obtained using a mixture of silicon-containing or isoparaffin-containing cleaning agents with surfactants and hydrophilic solvents and maintaining safety in environment.

Abstract: A solvent recovering system capable of recovering the solvent wetting solvent-cleaned articles, such as machine parts, electronic parts or medical instruments, without releasing the solvent into the atmosphere. A solvent vapor processing unit is connected by circulation passages to a closed chamber for accommodating solvent-cleaned articles. The vapor of the solvent evaporated from the solvent-cleaned articles is circulated through the closed chamber and the solvent vapor processing unit to subject the vapor repeatedly to adsorption or condensation to recover the solvent perfectly so that the solvent may not be released into the atmosphere to prevent air pollution and harm on health.

Abstract: A cleaning device having a storing tank storing noncombustible or incombustible liquid, a covering member being formed by placing a lower end opening in the stored liquid in the storing tank, the combustible solvent and the cleaned object being brought into contact with the covering chamber of a spacing formed by the covering member and the stored liquid to constitute the cleaning part for performing the cleaning operation.

Abstract: To clean electronic parts, machine parts, medical equipment and the like, even if a solvent is detrimental to the human body, environment, and the like such as, for example isopropyl alcohol, another alcohol, a terpene oil, a hydrocarbon solvent, or other combustible solvent is used as a cleaning liquid, safe cleaning that prevents the cleaning liquid from igniting can be carried out since the cleaning process is carried out in such a manner that a cleaning means holding a cleaning liquid is positioned within a holding tank containing an incombustible liquid with the cleaning means submerged within the tank, or with the gateway of the cleaning means nonsubmerged, or with the cleaning means the surface of the incombustible liquid.