초록 ▼

A compact and efficient heat exchanger is defined by three coaxial tubes, the intermediate tube being spirally fluted and in intimate contact with inner and outer tubes. The resulting three walled tubular structure defines a spiral vent passage and double wall separation between inner and outer flow

A compact and efficient heat exchanger is defined by three coaxial tubes, the intermediate tube being spirally fluted and in intimate contact with inner and outer tubes. The resulting three walled tubular structure defines a spiral vent passage and double wall separation between inner and outer flow paths. The three walled structure may be formed into an evaporator coil for use in a water cooler.

대표청구항 ▼

Apparatus for transferring thermal energy between a pair of isolated liquids comprising: reservoir means for temporarily storing a quantity of a first liquid; heat exchanger means for defining a pair of fluidically isolated flow paths, said heat exchanger means being at least in part immersed in sai

Apparatus for transferring thermal energy between a pair of isolated liquids comprising: reservoir means for temporarily storing a quantity of a first liquid; heat exchanger means for defining a pair of fluidically isolated flow paths, said heat exchanger means being at least in part immersed in said reservoir, said heat exchanger means including: an inner conduit, said inner conduit defining a first flow path for a second liquid, said first flow path having first and second ends; an intermediate conduit, said intermediate conduit in part comprising a spirally fluted tube in intimate contact with the exterior of said inner conduit whereby a double wall separation is defined between the interior of said inner conduit and the exterior of said fluted tube, said fluted tube cooperating with said inner conduit to define a first spiralled space therebetween; and an outer conduit, the interior of said outer conduit being in intimate contact with said fluted tube, said outer conduit cooperating with said fluted tube to define a second spiralled space between said outer conduit and fluted tube, said second space comprising a portion of a second flow path, said outer conduit being sealed to said intermediate conduit at a first end of said outer conduit, said second flow path communicating with the interior of said reservoir means; means for delivering said first fluid to the interior of said outer conduit at a point adjacent to said outer conduit first end whereby said first fluid flows along said second flow path and is discharged into said reservoir means; means for delivering said second fluid to said inner conduit at a first end of said first flow path, said delivering means extending into said reservoir means; means for receiving said second fluid from said inner conduit at the second end of said first flow path, said receiving means extending into said reservoir means; means for withdrawing said first liquid from said reservoir means; and means for venting said first spiralled space to the exterior of said reservoir means.