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1. US20130075070 - HEAT EXCHANGER TUBE

Office United States of America
Application Number 13243530
Application Date 23.09.2011
Publication Number 20130075070
Publication Date 28.03.2013
Publication Kind A1
IPC
F28F 1/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
28HEAT EXCHANGE IN GENERAL
FDETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
1Tubular elements; Assemblies of tubular elements
02Tubular elements of cross-section which is non-circular
CPC
F28F 1/025
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
28HEAT EXCHANGE IN GENERAL
FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
1Tubular elements; Assemblies of tubular elements
02Tubular elements of cross-section which is non-circular
025with variable shape, e.g. with modified tube ends, with different geometrical features
F24H 1/287
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
24HEATING; RANGES; VENTILATING
HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
1Water heaters having heat generating means, e.g. boiler, flow- heater, water-storage heater
22Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating
24with water mantle surrounding the combustion chamber or chambers
26the water mantle forming an integral body
28including one or more furnace or fire tubes
287with the fire tubes arranged in line with the combustion chamber
F24H 9/0026
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
24HEATING; RANGES; VENTILATING
HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
9Details
0005for water heaters
001Guiding means
0026in combustion gas channels
F28D 7/1676
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
28HEAT EXCHANGE IN GENERAL
DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
7Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
16the conduits being arranged in parallel spaced relation
163with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
1669the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
1676with particular pattern of flow of the heat exchange media, e.g. change of flow direction
F28F 1/426
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
28HEAT EXCHANGE IN GENERAL
FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
1Tubular elements; Assemblies of tubular elements
10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
42the means being both outside and inside the tubular element
424Means comprising outside portions integral with inside portions
426the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
Applicants HOME William
Inventors HOME William
Title
(EN) HEAT EXCHANGER TUBE
Abstract
(EN)

Disclosed is a heat exchanger tube having a flattened pipe having two non-flattened ends connected with a first opening and a second opening. A plurality of first half-slacking narrows and a plurality of second half-slacking narrows are arranged in an interlaced zigzag pattern such that a winding flow channel is formed inside the flattened pipe to increase heat exchange efficiency. In a preferred embodiment, each of the first half-slacking narrow and the second half-slacking narrow consists of a pair of adjacent indentations formed on the two opposing flattened surfaces of the flattened pipe respectively to achieve a unit body structure of the flattened pipe.