Method for equalizing differential heat expansions produced upon operation of a heat exchanger and heat exchanger embodying said method
AssigneeSociete Anonyme des Usines Chausson
InventorAndre Chartet
Life of this patent
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Abstract
Radiator comprising tubes, tube plates fitting ends of said tubes, lateral flanges and corrugated fins inserted between the tubes and between the tubes and the flanges. A bearing area is designed along the flanges or the tubes close to the tube plate for applying end fins between the flange and the adjacent tube. Means are designed for at least limiting joining portions of said fins extending at the level of said area.
Claims27
A method for compensating differential heat expansions produced upon operation of a heat exchanger of the type having inner tubes and end tubes, tube plates fitting ends of said tubes, and rigidly connected therewith, lateral flanges, and corrugated fins inserted between the tubes and between said tubes and the lateral flanges to form a unit, comprising the steps of welding or brazing as a one-piece unit with said lateral flanges and tube-plates rigidly connected together, and providing means for precluding bonding between said lateral flanges and said fins in the proximate area of said tube-plates wherein the connection of said end tubes to said lateral flanges through said fins in the proximate area of said tube plates is non-bonded.
A radiator for cooling a liquid, comprising inner and outer tubes, tube plates fitting ends of said tubes and rigidly connected therewith, lateral flanges, corrugated fins inserted between said inner tubes, said end tubes, and said lateral flanges, a bearing area along said lateral flanges and said end tubes in the proximate area of said tube plates, and means for limiting the joining portions of said fins extending at the level of said bearing area, wherein said bearing area holds said fins between said end tubes and said lateral flanges in a non-bonded condition.
A method for compensating differential heat expansion produced upon operation of a heat exchanger, said heat exchanger comprising inner tubes and end tubes, tube plates fitting ends of said tubes, lateral flanges, and corrugated fins inserted respectively between said tubes and between the lateral flanges and end tubes located adjacent to said lateral flanges, comprising the steps of:
- providing brazing material on portions of at least said tube plates, said inner tubes, said end tubes and said lateral flanges;
- limiting the introduction of brazing material between the lateral flanges and each end tube located adjacent said lateral flanges at least on portions thereof being close to each tube plate;
- and
- submitting the heat exchanger to brazing;
- whereby said tubes and tube-plates are rigidly connected, said tube plates and lateral flanges are also rigidly connected thus forming a frame and said tubes and corrugated fins inserted therebetween are also rigidly connected while at least a limited connection remains between the lateral flanges and portions at least of the end tubes adjacent to said lateral flanges.
A heat exchanger comprising inner tubes and end tubes, tube-plates fitting ends of said tubes, lateral flanges and corrugated fins inserted respectively between said tubes and between the flanges and end tubes located adjacent to said lateral flanges, wherein:
- the tubes are rigidly connected to the tube plates and said tube plates are rigidly connected to the flanges to form a rigid frame;
- the tubes are rigidly connected to the corrugated fins inserted between said tubes;
- and
- means are provided for limiting connection through the respective corrugated fins between the lateral flanges and portions of the end tubes adjacent to said lateral flanges.
Dependencies are inferred from the claim text.