Patent ID: 7484554

Claim:
A heat exchanging device comprising: a receptacle including a chamber for receiving a fluid medium therein, and having a lower portion, a middle portion and an upper portion, a housing received within said chamber of said receptacle, and including an outer peripheral wall having an upper portion arranged to allow the fluid medium to flow into said housing via said upper portion of said outer peripheral wall, and including on inner peripheral wall having a lower portion directed toward said lower portion of said receptacle, a casing disposed within said housing and including an outlet port coupled to an inner compartment of said inner peripheral wall of said housing, and including an inlet opening for receiving the fluid medium and to allow the fluid medium to flow through said inlet opening and to flow into said casing and then to flow out through said outlet port of said casing, and including a partition disposed in said casing to form separated first and second chambers in said casing, and including an entrance and an exit communicating with said second chamber of said casing, a first paddling device disposed within said first chamber of said casing for paddling the fluid medium to flow into said casing and then to flow out through said outlet port of said casing, a second padding device disposed within said second chamber of said casing and coupled to said first paddling device to allow said first and said second paddling devices to be rotated in concert with each other, and a coil arranged between said outer peripheral wall and said inner peripheral wall of said housing, and coupled to said exit of said casing for receiving a fluid material, and arranged to have the fluid material to flow in a direction opposite to that of the fluid medium, to allow the fluid medium to transmit and to exchange heat to the fluid material.