Abstract: A method for washing an article to remove contaminations such as oils and fats, foreign substances and the like from a surface of the article is provided. The washing method comprises the steps of: cooling a washing solution to obtain a super-cooled washing solution; heating an article to increase its surface temperature to the temperature which is not lower than the boiling point of the washing solution; and washing and drying the article concurrently, while spraying the super-cooled washing solution to the heated article. The washing apparatus for carrying out this washing method is also provided. Using these washing method and apparatus, it becomes possible to downsize a scale of the washing apparatus, and to operate the washing apparatus under the energy-saving conditions as a result of reduction in an amount of the consumed energies, and the washing process at an accelerated speed.

Abstract: The cleaning apparatus includes a reservoir tank for reserving a cleaning fluid, a pressure-feed unit for feeding the cleaning fluid while pressurizing the cleaning fluid above the atmospheric pressure, a heating unit for heating the cleaning fluid pressure-fed from the pressure-feed unit above an atmospheric pressure boiling point of the cleaning fluid, a gas supply unit for supplying a gas and an injection unit connected to the heating unit and the gas supply unit for injecting the cleaning fluid pressurized by the pressure-feeding unit and heated by the heating unit as a pressurized superheated cleaning fluid and the gas supplied from the gas supply unit to the member at the same time.

Abstract: A cleaning liquid is pressurized and superheated to a condition, in which temperature of the cleaning liquid is above an atmospheric boiling point. A product to be cleaned is interposed between a pair of liquid holding blocks, so that gaps are respectively formed between side surfaces of the product and the liquid holding blocks. The pressurized and superheated liquid is injected to the product so that layers of condensate of vapor of injected cleaning liquid are formed in the gaps. Contamination on the surface of the product is removed by the cleaning liquid and the surface is dried by latent heat of the condensate of the vapor of the cleaning liquid.

Abstract: The cleaning apparatus includes a reservoir tank for reserving a cleaning fluid, a pressure-feed unit for feeding the cleaning fluid while pressurizing the cleaning fluid above the atmospheric pressure, a heating unit for heating the cleaning fluid pressure-fed from the pressure-feed unit above an atmospheric pressure boiling point of the cleaning fluid, a gas supply unit for supplying a gas and an injection unit connected to the heating unit and the gas supply unit for injecting the cleaning fluid pressurized by the pressure-feeding unit and heated by the heating unit as a pressurized superheated cleaning fluid and the gas supplied from the gas supply unit to the member at the same time.

Abstract: A method for washing an article to remove contaminations such as oils and fats, foreign substances and the like from a surface of the article is provided. The washing method comprises the steps of: cooling a washing solution to obtain a super-cooled washing solution; heating an article to increase its surface temperature to the temperature which is not lower than the boiling point of the washing solution; and washing and drying the article concurrently, while spraying the super-cooled washing solution to the heated article. The washing apparatus for carrying out this washing method is also provided. Using these washing method and apparatus, it becomes possible to downsize a scale of the washing apparatus, and to operate the washing apparatus under the energy-saving conditions as a result of reduction in an amount of the consumed energies, and the washing process at an accelerated speed.

Abstract: A cleaning liquid is pressurized and superheated to a condition, in which temperature of the cleaning liquid is above an atmospheric boiling point. A product to be cleaned is interposed between a pair of liquid holding blocks, so that gaps are respectively formed between side surfaces of the product and the liquid holding blocks. The pressurized and superheated liquid is injected to the product so that layers of condensate of vapor of injected cleaning liquid are formed in the gaps. Contamination on the surface of the product is removed by the cleaning liquid and the surface is dried by latent heat of the condensate of the vapor of the cleaning liquid.

Abstract: A coating structure for a metal member includes a surface-smoothing layer formed on the metal member for smoothing a surface of the metal member, and a fluorine-based film formed on the surface-smoothing layer. The fluorine-based film can be formed by applying a fluorine-containing solution on the surface-smoothing layer, and by drying the fluorine-containing solution. The coating structure can be suitably used for a fuel injection nozzle.

Abstract: A coating structure for a metal member includes a surface-smoothing layer formed on the metal member for smoothing a surface of the metal member, and a fluorine-based film formed on the surface-smoothing layer. The fluorine-based film can be formed by applying a fluorine-containing solution on the surface-smoothing layer, and by drying the fluorine-containing solution. The coating structure can be suitably used for a fuel injection nozzle.