Abstract: A plurality of hollow condensation units 6 are coaxially connected. Compressed air is caused to move in sequence from the upstream side condensation units 6 into the downstream side condensation units 6 to be dehumidified. Dehumidified compressed air can be supplied to a downstream side air tool 24. Collision plates 15, 16 capable of colliding with compressed air are provided inside each condensation unit 6. Compressed air is provided to be condensable and dehumidified compressed air is provided to be capable of moving in sequence into the downstream side condensation units 6.

Abstract: A concentrating apparatus for concentrating compressed air includes a first hollow cylindrical concentrating unit which is adapted to cause compressed air to: (i) collide with an upstream side of a collision plate so as to be concentrated and partially liquefied; (ii) move to an annular passage and be jetted into an air moving chamber so as to be adiabatically expanded and partially liquefied; (iii) be compressed in an air compressing passage and pushed out so as to retreat along a conical partition wall; (iv) collide with a downstream side of the collision plate so as to be concentrated and partially liquefied; (v) be introduced into an upstream end of an outlet tube; and (vi) move to a downstream end of the outlet tube and into a second hollow cylindrical concentrating unit.

Abstract: A method and apparatus for concentrating compressed air, and an air dryer, in which a concentrating tube is formed by connecting a plurality of concentrating units, so that the structure, when compared with the conventional one, can be simplified and the number of parts can be reduced by virtue of the concentrating tube, thereby reducing the size and weight, facilitating production and reducing the cost, enabling to obtain not only outstanding concentrating and dehumidifying performance but also convenience, and in which the best concentrating and dehumidifying performance can be obtained easily and freely depending on the environment and conditions where the method and apparatus thus constructed are used, and collection of drain can be performed reasonably and easily.

Abstract: A method and apparatus for cooling compressed air include the following. Compressed air is introduced into a vortex tube where cold air and warm air are generated. The cold air and warm air are introduced into a pressure vessel where the temperature and moisture of the compressed air are adjusted. The adjusted compressed air is fed to a downstream side of the pressure vessel. Before the generated cold air and warm air are introduced into the pressure vessel, the warm air is introduced into a pre-pressure vessel disposed at an upstream side of the pressure vessel. The cold air is introduced into a cooling tube or cooling chamber which is disposed inside the pre-pressure vessel which is disposed at the upstream side of the pressure vessel. The warm air is adjusted by cooling. The adjusted warm air is introduced into the pressure vessel from the pre-pressure vessel together with the cold air.

Abstract: [PROBLEM TO BE SOLVED] A method and apparatus for cooling compressed air include the following. Compressed air is introduced into a vortex tube where cold air and warm air are generated. The cold air and warm air are introduced into a pressure vessel where the temperature and moisture of the compressed air are adjusted. The adjusted compressed air is fed to a downstream side of the pressure vessel. Before the generated cold air and warm air are introduced into the pressure vessel, the warm air is introduced into a pre-pressure vessel disposed at an upstream side of the pressure vessel. The cold air is introduced into a cooling tube or cooling chamber which is disposed inside the pre-pressure vessel which is disposed at the upstream side of the pressure vessel. The warm air is adjusted by cooling. The adjusted warm air is introduced into the pressure vessel from the pre-pressure vessel together with the cold air.