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US 10,030,915 B2Granted
Heat exchanger
AssigneeCosmogas S.R.L.
InventorAlberto Alessandrini
Life of this patent
Estimating the term…
Abstract
A heat exchanger has a heat-exchanger unit includes one or more substantially coaxial coiled tubes and a casing for housing the heat-exchanger unit. The casing has a first end wall, a second end wall, and a peripheral part between the two end walls. Each tube has a first end and a second end. The heat-exchanger unit is supported by the first end wall of the casing, with the first end and the second end of each tube that is located substantially at the first end wall of the casing.
Claims16
A heat exchanger having:
- a burner operable to generate combustion fumes;
- a heat-exchanger unit that includes a plurality of substantially coaxial coiled tubes for a fluid, which comprise at least one first tube and one second tube having turns of different diameter, such that the second tube forms a helix that extends within a helix formed by the first tube, first gaps being defined between the turns of the first tube and second gaps being defined between the turns of the second tube;
- and
- a casing defining a chamber for housing the heat-exchanger unit, the casing having a first end wall, a second end wall, and a peripheral part between the two end walls, the chamber being configured to receive a the combustion fumes for heat exchange with the fluid, the casing having a fume outlet and the first end wall having at least one through opening at a central region thereof,
- wherein the burner is mounted on the first end wall at said through opening to extend at least in part within the helix formed by the first tube, in such a way that the combustion fumes produced by the burner flows through the first gaps and the second gaps before leaving the chamber via the fume outlet,
- wherein each tube of the plurality has a first end and a second end,
- wherein the heat exchanger comprises a supporting arrangement for the heat-exchanger unit, the supporting arrangement being supported by the first end wall of the casing, such that the heat-exchanger unit is supported by the first end wall of the casing via the supporting arrangement,
- wherein the first end of each tube of the plurality is located substantially at the first end wall of the casing,
- wherein the second end of each tube of the plurality is located substantially at the first end wall of the casing,
- wherein each tube of the plurality has a first intermediate angled bend and a second intermediate angled bend, to define a first end stretch of tube and a second end stretch of tube, respectively, which extend in a generally axial direction of the helix formed by the corresponding tube, and
- wherein the first end stretches of tube extend outside the helix formed by the outermost conduit of the plurality.
8 more elements
A heat exchanger having:
- a burner operable to generate combustion fumes;
- a heat-exchanger unit that includes a plurality of substantially coaxial coiled tubes for a fluid, which comprise at least one first tube and one second tube having turns of different diameter, such that the second tube forms a helix that extends within a helix formed by the first tube, first gaps being defined between the turns of the first tube and second gaps being defined between the turns of the second tube;
- and
- a casing defining a chamber for housing the heat-exchanger unit, the casing having a first end wall, a second end wall, and a peripheral part between the two end walls, the chamber being configured to receive a the combustion fumes for heat exchange with the fluid, the casing having a fume outlet and the first end wall having at least one through opening at a central region thereof,
- wherein the burner is mounted on the first end wall at said through opening to extend at least in part within the helix formed by the first tube, in such a way that the combustion fumes produced by the burner flows through the first gaps and the second gaps before leaving the chamber via the fume outlet,
- wherein each tube of the plurality has a first end and a second end,
- wherein the heat exchanger comprises a supporting arrangement for the heat-exchanger unit, the supporting arrangement being supported by the first end wall of the casing, such that the heat-exchanger unit is supported by the first end wall of the casing via the supporting arrangement,
- wherein the first end of each tube of the plurality is located substantially at the first end wall of the casing,
- wherein the second end of each tube of the plurality is located substantially at the first end wall of the casing,
- wherein the supporting arrangement includes a first end plate, generally facing the first end wall of the casing and having a respective through opening connected to the through opening of the first wall of the casing and substantially coaxial thereto, at least one of said openings being defined by a tubular portion of the first end wall or of the first end plate, the first end plate being secured to the first end wall;
- wherein the turn at a first end of the helix formed by a tube of the plurality is in contact with the first end plate, and
- and wherein at least one annular portion of the first end plate is spaced apart from the first end wall of the casing, in such a way that between the first end wall and said annular portion of the first end plate there is defined a first generally annular air gap which is in fluid communication with a second generally annular air gap comprised between the peripheral part of the casing and the helix formed by the outermost tube of the plurality.
9 more elements
A heat exchanger having:
- a burner operable to generate combustion fumes;
- a heat-exchanger unit that includes:
- a plurality of substantially coaxial coiled tubes for a fluid, comprising at least one first tube and one second tube having turns of different diameter, such that the second tube forms a helix that extends within a helix formed by the first tube, first gaps being defined between the turns of the first tube and second gaps being defined between the turns of the second tube;
- and
- a casing defining a chamber for housing the heat-exchanger unit, the casing having a first end wall, a second end wall, and a peripheral part between the first and second end walls, the chamber being configured to receive the combustion fumes for heat exchange with the fluid, the casing having a fume outlet and the first end wall having at least one through opening at a central region thereof,
- wherein the burner is mounted on the first end wall at said through opening to extend at least in part within the helix formed by the first tube, in such a way that the combustion fumes produced by the burner flows through the first gaps and the second gaps before leaving the chamber via the fume outlet,
- wherein the heat exchanger comprises a supporting arrangement for the heat-exchanger unit, the supporting arrangement being supported by the first end wall of the casing, such that the heat-exchanger unit is supported by the first end wall of the casing via the supporting arrangement,
- wherein the supporting arrangement includes:
- a first end plate, generally facing the first end wall of the casing and having a respective through opening connected to the through opening of the first end wall and substantially coaxial thereto, at least one of said openings being defined by a tubular portion of the first end wall or of the first end plate, the first end plate being secured to the first end wall,
- wherein at least one annular portion of the first end plate is spaced apart from the first end wall of the casing, in such a way that between the first end wall and said annular portion of the first end plate there is defined a first generally annular air gap which is in fluid communication with a second generally annular air gap comprised between the peripheral part of the casing and the helix formed by the outermost tube of the plurality,
- and wherein
- the turn at a first end of a helix formed by a tube of the plurality is in contact with the first end plate.
9 more elements
Dependencies are inferred from the claim text.