Patent ID: 8813833
Filing Date: 2014-08-26
Classification: F26B,F28D

Abstract:
1. A heat exchanging device for powder, which comprises: a casing having a front end and a rear end and extending lengthwise in a substantially horizontal direction, the casing configured to flow the powder in the horizontal direction from the front end to the rear end of the casing; a shaft configured to supply a heat-exchange medium to a plurality of heat exchangers arranged along a length of the casing, the shaft being rotatably supported within the casing; and the plurality of heat exchangers each having an outer circumferential edge, are configured to generate piston flowability of the powder along an axis of the rotating shaft and in the lengthwise direction of the casing from the front end to the rear end of the casing, the plurality of heat exchangers extending radially from the axis of the shaft and respectively having a center arranged at predetermined intervals on the shaft; wherein: at least two of the plurality of heat exchangers are hollow disk-shaped heat exchangers having a notched recess and are configured to receive the heat-exchange medium from the shaft, to exchange heat with the powder passing lengthwise through the casing, to suppress a compression force applied to the powder relative to a wedge-shaped heat exchanger, and to ensure piston flowability corresponding to the wedge-shaped heat exchanger; the notched recess facilitating piston flowability, extending perpendicularly to the powder passing lengthwise through the casing and having a radius extending from the center to the circumferential edge of the hollow disk-shaped heat exchanger at the notched recess that is less than a radius from the center to the circumferential edge of the hollow disk-shaped heat exchanger at locations other than the notched recess, and each hollow disk-shaped heat exchanger includes two disc-shaped plates having a bent rim that extends circumferentially, the bent rims of the two disc-shaped plates are curved inwardly toward each other and are joined together forming a circumferential edge around a periphery of each hollow disk-shaped heat exchanger that encloses a hollow area between the two disc-shaped plates, the hollow area extending from the bent rims to the shaft.