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A heat exchanger for exchanging heat between two different temperature fluids. The heat exchanger includes a sealed housing having first and second pairs of inlets and outlets. A first conduit is disposed within the housing. A second conduit is concentrically disposed within and spaced from the firs

A heat exchanger for exchanging heat between two different temperature fluids. The heat exchanger includes a sealed housing having first and second pairs of inlets and outlets. A first conduit is disposed within the housing. A second conduit is concentrically disposed within and spaced from the first conduit to define a first flow path between the spaced wall surfaces thereof which is disposed in fluid flow communication with the first inlet and first outlet for flow of a first fluid in a first direction through the housing. A second fluid flow path including first and second serially connected sections is provided for directing a second fluid between the second inlet and the second outlet over the exterior wall surface of the first conduit and through the second conduit in a second direction opposite to the direction of flow of the first fluid. In a preferred embodiment, a sealed chamber is formed interiorly within the housing about the first conduit. A third inlet and a third outlet are formed in the housing and are interconnected in a fluid flow communication by a third conduit preferably disposed exteriorly from the housing. The second and third inlets are disposed in fluid flow communication with the sealed chamber at opposite ends thereof to define the first section of the second flow path for the second fluid through the housing. The third outlet is disposed in fluid flow communication with one end of the second conduit such that the second fluid flowing through the sealed chamber in a second direction opposite to the direction of the fluid flow of the first fluid will be directed through the second conduit in the same second direction opposite the direction of flow of the first fluid. Alternately, a plurality of pairs of concentric first and second conduits are mounted in a spaced apart manner within the interior of the housing.

대표청구항 ▼

A heat exchanger for exchanging heat between first and second fluids having different temperatures comprising: a sealed housing; a first inlet and a first outlet formed in the housing; a first conduit disposed within the housing; a second conduit concentrically disposed within and spaced from the fi

A heat exchanger for exchanging heat between first and second fluids having different temperatures comprising: a sealed housing; a first inlet and a first outlet formed in the housing; a first conduit disposed within the housing; a second conduit concentrically disposed within and spaced from the first conduit to define a first flow path between the wall surfaces of the first and second conduits, the first flow path being disposed in fluid flow communication with the first inlet and the first outlet for flow of the first fluid in a first direction through the housing between the first inlet and the first outlet; a second inlet and second outlet formed in the housing; and means, including first and second serially connected portions, for forming a second flow path between the second inlet and the second outlet for flow of the second fluid through the housing in a second direction opposed to the first flow direction of the first fluid, the first portion of the second flow path being across the exterior surface of the first conduit and the second portion of the second flow path being through the second conduit, the means for forming the second flow path including: first means, disposed in the housing, for directing flow of the second fluid across the exterior wall surface of the first conduit in the second direction; and a third conduit disposed externally from the housing, the third conduit having a third inlet disposed in fluid flow communication with the first means for directing the second fluid flow and a third outlet disposed in fluid flow communication with one end of the second conduit for directing flow of the second fluid from the first means for directing second fluid flow to the one end of the second conduit.