Patent ID: 8651171

Claim:
A device for exchanging heat comprising: a heat exchanger comprising a single flow circuit, said single flow circuit having an inlet having a first fluid port and an outlet having a second fluid port said single flow circuit configured to receive a thermal conductive fluid; at least one fluid pump coupled to the single flow circuit, said fluid pump configured to pump the thermal conductive fluid in a first direction or in an opposite second direction in the single flow circuit, wherein the at least one fluid pump is coupled to at least one of the first fluid port and the second fluid port of the single flow circuit; a periodic fluid direction-change operative control device configured to control operations of the at least one fluid pump so that the periodic fluid direction-change operative control device is operable to periodically change a flow direction of the thermal conductive fluid from the first direction and the opposite second direction in the single flow circuit; and, at least one temperature detecting device installed at a position on the heat exchanger to detect a temperature variation of the thermal conductive fluid, wherein the periodic fluid direction-change operative control device is configured to periodically control the fluid flow direction of the thermal conductive fluid in one or more of the following operational modes: a mode where the fluid flow direction is manually adjustable; a mode where the fluid flow direction is operatively controlled by setting a time period for flowing thermal conductive fluid in the first and opposite second direction; and, a mode where the fluid flow direction is operatively controlled in the first and opposite second directions when a detected signal from the temperature detecting device reaches a set temperature.