Patent EP-2712691-A1 (EP)
Inventor: FRIEDRICH JUERGEN
IPC: B05B7/12
Filed: 2013-09-27
Abstract: The device comprises a first inlet (4) for a first cooling medium, a second inlet (3) for a second cooling medium, a mixing chamber for mixing coolant introduced by first inlet and the second inlet into a coolant mixture, and a spring-loaded slide, in an open position, allowing flow of the first coolant from the first inlet into the mixing chamber and in a closed position, supply of the first coolant from the first inlet into the mixing chamber opposite to the open position. The device comprises a first inlet (4) for a first cooling medium, a second inlet (3) for a second cooling medium, a mixing chamber for mixing coolant introduced by first inlet and the second inlet into a coolant mixture, and a spring-loaded slide, in an open position, for allowing flow of the first coolant from the first inlet into the mixing chamber and in a closed position opposite to the open position, to supply the first coolant from the first inlet into the mixing chamber. A displacement of the slide between the open position and the closed position is carried with respect to slider acting pressure on the second cooling medium. The second coolant flows through the second inlet when the slide is present in the open position and does nor flow through the second inlet when the slide is present in the closed position. The first and second coolants comprise water. The first inlet is connected via a first channel to the mixing chamber. The second inlet is connected via a second channel to the mixing chamber. The slide adjusts the flow of the coolant through the first channel. The device further comprises a third channel positioned partially across and on both sides of the first channel, an outlet (6), and a channel (5). The slide is arranged along the third channel, and is movable and guided by the third channel. The third channel is present in fluid communication with the second channel so that a coolant pressure of the second coolant directly acts on the third channel to movably guide the slide. The slide is guided in sections along a sealed inner wall of the third channel, and comprises a first portion, a second portion and a third portion positioned between the first portion and the second position. The first portion of the slide is present in the open position so that the coolant flows through the first channel from the first inlet into the mixing chamber. The second portion is closed position opposite to the open position so that flow of coolant is reduced or completely blocked. Each of the second and third portions is formed complementary to an inner cross-section of the third channel so that the second and third portions seal the third channel with respect to coolant flow. The first portion has a smaller cross-section as compared to the second and third portions, and includes through holes or groove for conducting the coolant. The second portion includes holes for passing coolant. The slider has an elongated shape with two opposite ends, and is arranged movable along its longitudinal axis. A second end is biased against the pressure acting on the first end of pressure of the second refrigerant by a spring element or a gas reservoir. The channel connects the outlet to the mixing chamber for guiding the coolant mixture to the outlet. An independent claim is included for a process for the secondary cooling of a casting plant.