F28F1/00	7	Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00)	F28F1/00	F28F1/00		979
F28F1/003	8	{Multiple wall conduits, e.g. for leak detection (leak-detection in metal cooled nuclear reactor steam generators F22B1/066)}	F28F1/00	F28F1/00		529
F28F1/006	8	{with variable shape, e.g. with modified tube ends, with different geometrical features (F28F1/025, F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence)}	F28F1/00	F28F1/00		477
F28F1/02	8	Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence)	F28F1/02	F28F1/02		1845
F28F1/022	9	{with multiple channels}	F28F1/02	F28F1/02		2130
F28F1/025	9	{with variable shape, e.g. with modified tube ends, with different geometrical features (F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence)}	F28F1/02	F28F1/02		667
F28F2001/027	9	{with dimples}	F28F1/02	F28F1/02		215
F28F1/04	9	polygonal, e.g. rectangular {(F28F1/022 takes precedence)}	F28F1/04	F28F1/04		627
F28F1/045	10	{with assemblies of stacked elements}	F28F1/04	F28F1/04		216
F28F1/06	9	crimped or corrugated in cross-section	F28F1/06	F28F1/06		557
F28F1/08	8	Tubular elements crimped or corrugated in longitudinal section	F28F1/08	F28F1/08		919
F28F1/10	8	Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08)	F28F1/10	F28F1/10		807
F28F1/105	9	{the means being corrugated elements extending around the tubular elements}	F28F1/10	F28F1/10		215
F28F1/12	9	the means being only outside the tubular element	F28F1/12	F28F1/12		1550
F28F1/122	10	{and being formed of wires}	F28F1/12	F28F1/12		387
F28F1/124	10	{and being formed of pins}	F28F1/12	F28F1/12		827
F28F1/126	10	{consisting of zig-zag shaped fins (F28F1/105 takes precedence)}	F28F1/12	F28F1/12		1639
F28F1/128	11	{Fins with openings, e.g. louvered fins}	F28F1/12	F28F1/12		1060
F28F1/14	10	and extending longitudinally (F28F1/38 takes precedence)	F28F1/14	F28F1/14		773
F28F1/16	11	the means being integral with the element, e.g. formed by extrusion (F28F1/22 takes precedence)	F28F1/16	F28F1/16		745
F28F1/18	12	the element being built-up from finned sections	F28F1/18	F28F1/18		157
F28F1/20	11	the means being attachable to the element (F28F1/22 takes precedence)	F28F1/20	F28F1/20		580
F28F1/22	11	the means having portions engaging further tubular elements	F28F1/22	F28F1/22		890
F28F1/24	10	and extending transversely (F28F1/38 takes precedence)	F28F1/24	F28F1/24		1225
F28F1/26	11	the means being integral with the element (F28F1/32 takes precedence)	F28F1/26	F28F1/26		335
F28F1/28	12	the element being built-up from finned sections	F28F1/28	F28F1/28		268
F28F1/30	11	the means being attachable to the element (F28F1/32 takes precedence)	F28F1/30	F28F1/30		1035
F28F1/32	11	the means having portions engaging further tubular elements	F28F1/32	F28F1/32		3697
F28F1/325	12	{Fins with openings}	F28F1/32	F28F1/32		1500
F28F1/34	10	and extending obliquely (F28F1/38 takes precedence)	F28F1/34	F28F1/34		374
F28F1/36	11	the means being helically wound fins or wire spirals	F28F1/36	F28F1/36		1289
F28F1/38	10	and being staggered to form tortuous fluid passages	F28F1/38	F28F1/38		89
F28F1/40	9	the means being only inside the tubular element	F28F1/40	F28F1/40		2639
F28F1/405	10	{and being formed of wires}	F28F1/40	F28F1/40		109
F28F1/42	9	the means being both outside and inside the tubular element	F28F1/42	F28F1/42		1174
F28F1/422	10	{with outside means integral with the tubular element and inside means integral with the tubular element (F28F1/424 takes precedence)}	F28F1/42	F28F1/42		582
F28F1/424	10	{Means comprising outside portions integral with inside portions}	F28F1/42	F28F1/42		76
F28F1/426	11	{the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex}	F28F1/42	F28F1/42		476
F28F2001/428	10	{Particular methods for manufacturing outside or inside fins}	F28F1/42	F28F1/42		80
F28F1/44	10	and being formed of wire mesh	F28F1/44	F28F1/44		37
F28F3/00	7	Plate-like or laminated elements; Assemblies of plate-like or laminated elements (specially adapted for movement F28F5/00)	F28F3/00	F28F3/00		893
F28F3/005	8	{Arrangements for preventing direct contact between different heat-exchange media (F28F3/10 takes precedence)}	F28F3/00	F28F3/00		119
F28F3/02	8	Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence)	F28F3/02	F28F3/02		2031
F28F3/022	9	{the means being wires or pins}	F28F3/02	F28F3/02		780
F28F3/025	9	{the means being corrugated, plate-like elements}	F28F3/02	F28F3/02		1826
F28F3/027	10	{with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips}	F28F3/02	F28F3/02		859
F28F3/04	9	the means being integral with the element	F28F3/04	F28F3/04		1095
F28F3/042	10	{in the form of local deformations of the element}	F28F3/04	F28F3/04		411
F28F3/044	11	{the deformations being pontual, e.g. dimples}	F28F3/04	F28F3/04		891
F28F3/046	11	{the deformations being linear, e.g. corrugations}	F28F3/04	F28F3/04		1282
F28F3/048	10	{in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels}	F28F3/04	F28F3/04		1138
F28F3/06	9	the means being attachable to the element	F28F3/06	F28F3/06		616
F28F3/08	8	Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning	F28F3/08	F28F3/08		1309
F28F3/083	9	{capable of being taken apart}	F28F3/08	F28F3/08		1305
F28F3/086	9	{having one or more openings therein forming tubular heat-exchange passages}	F28F3/08	F28F3/08		820
F28F3/10	9	Arrangements for sealing the margins	F28F3/10	F28F3/10		823
F28F3/12	8	Elements constructed in the shape of a hollow panel, e.g. with channels {(F28D1/02, F28D1/03 take precedence)}	F28F3/12	F28F3/12		3530
F28F3/14	9	by separating portions of a pair of joined sheets to form channels, e.g. by inflation (manufacture thereof B23P)	F28F3/14	F28F3/14		665
F28F5/00	7	Elements specially adapted for movement	F28F5/00	F28F5/00		298
F28F5/02	8	Rotary drums or rollers	F28F5/02	F28F5/02		646
F28F5/04	8	Hollow impellers, e.g. stirring vane	F28F5/04	F28F5/04		150
F28F5/06	8	Hollow screw conveyors	F28F5/06	F28F5/06		151
F28F7/00	7	Elements not covered by group F28F1/00, F28F3/00 or F28F5/00	F28F7/00	F28F7/00		205
F28F7/02	8	Blocks traversed by passages for heat-exchange media {(F28D7/0008 takes precedence)}	F28F7/02	F28F7/02		1127
F28F9/00	7	Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings	F28F9/00	F28F9/00		2095
F28F9/001	8	{Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core}	F28F9/00	F28F9/00		2298
F28F9/002	9	{with fastening means for other structures}	F28F9/00	F28F9/00		1671
F28F2009/004	9	{Common frame elements for multiple cores}	F28F9/00	F28F9/00		166
F28F9/005	8	{Other auxiliary members within casings, e.g. internal filling means or sealing means}	F28F9/00	F28F9/00		1019
F28F9/007	8	Auxiliary supports for elements	F28F9/007	F28F9/007		1229
F28F9/0075	9	{Supports for plates or plate assemblies}	F28F9/007	F28F9/007		643
F28F9/013	9	for tubes or tube-assemblies	F28F9/013	F28F9/013		2256
F28F9/0131	10	{formed by plates (F28F9/0138 takes precedence)}	F28F9/013	F28F9/013		856
F28F9/0132	10	{formed by slats, tie-rods, articulated or expandable rods}	F28F9/013	F28F9/013		609
F28F9/0133	10	{formed by concentric strips}	F28F9/013	F28F9/013		36
F28F9/0135	10	{formed by grids having only one tube per closed grid opening (F28F9/0132 and F28F9/0133 take precedence)}	F28F9/013	F28F9/013		129
F28F9/0136	11	{formed by intersecting strips}	F28F9/013	F28F9/013		83
F28F9/0137	10	{formed by wires, e.g. helically coiled (F28F9/0135 takes precedence)}	F28F9/013	F28F9/013		90
F28F9/0138	10	{formed by sleeves for finned tubes}	F28F9/013	F28F9/013		74
F28F9/02	8	Header boxes; End plates	F28F9/02	F28F9/02		3376
F28F9/0202	9	{Header boxes having their inner space divided by partitions}	F28F9/02	F28F9/02		756
F28F9/0204	10	{for elongated header box, e.g. with transversal and longitudinal partitions}	F28F9/02	F28F9/02		360
F28F9/0207	11	{the longitudinal or transversal partitions being separate elements attached to header boxes (F28F9/0212, F28F9/0217 take precedence)}	F28F9/02	F28F9/02		195
F28F9/0209	11	{having only transversal partitions}	F28F9/02	F28F9/02		387
F28F9/0212	12	{the partitions being separate elements attached to header boxes}	F28F9/02	F28F9/02		689
F28F9/0214	11	{having only longitudinal partitions}	F28F9/02	F28F9/02		473
F28F9/0217	12	{the partitions being separate elements attached to header boxes}	F28F9/02	F28F9/02		178
F28F9/0219	9	{Arrangements for sealing end plates into casing or header box; Header box sub-elements (F28F9/0236 takes precedence)}	F28F9/02	F28F9/02		912
F28F9/0221	10	{Header boxes or end plates formed by stacked elements}	F28F9/02	F28F9/02		686
F28F9/0224	10	{Header boxes formed by sealing end plates into covers (F28F9/0221 takes precedence)}	F28F9/02	F28F9/02		1129
F28F9/0226	11	{with resilient gaskets}	F28F9/02	F28F9/02		703
F28F9/0229	9	{Double end plates; Single end plates with hollow spaces}	F28F9/02	F28F9/02		727
F28F9/0231	9	{Header boxes having an expansion chamber}	F28F9/02	F28F9/02		320
F28F9/0234	9	{having a second heat exchanger disposed there within, e.g. oil cooler}	F28F9/02	F28F9/02		462
F28F9/0236	9	{floating elements}	F28F9/02	F28F9/02		139
F28F9/0239	10	{floating header boxes}	F28F9/02	F28F9/02		216
F28F9/0241	10	{floating end plates}	F28F9/02	F28F9/02		187
F28F9/0243	9	{Header boxes having a circular cross-section}	F28F9/02	F28F9/02		807
F28F9/0246	9	{Arrangements for connecting header boxes with flow lines}	F28F9/02	F28F9/02		2062
F28F9/0248	10	{Arrangements for sealing connectors to header boxes}	F28F9/02	F28F9/02		451
F28F9/0251	10	{Massive connectors, e.g. blocks; Plate-like connectors}	F28F9/02	F28F9/02		315
F28F9/0253	11	{with multiple channels, e.g. with combined inflow and outflow channels}	F28F9/02	F28F9/02		443
F28F9/0256	10	{Arrangements for coupling connectors with flow lines}	F28F9/02	F28F9/02		518
F28F9/0258	11	{of quick acting type, e.g. with snap action}	F28F9/02	F28F9/02		172
F28F9/026	9	{with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits}	F28F9/02	F28F9/02		717
F28F9/0263	10	{by varying the geometry or cross-section of header box}	F28F9/02	F28F9/02		349
F28F9/0265	10	{by using guiding means or impingement means inside the header box}	F28F9/02	F28F9/02		692
F28F9/0268	11	{in the form of multiple deflectors for channeling the heat exchange medium}	F28F9/02	F28F9/02		351
F28F9/027	10	{in the form of distribution pipes}	F28F9/02	F28F9/02		338
F28F9/0273	11	{with multiple holes}	F28F9/02	F28F9/02		520
F28F9/0275	11	{with multiple branch pipes}	F28F9/02	F28F9/02		568
F28F9/0278	10	{in the form of stacked distribution plates or perforated plates arranged over end plates}	F28F9/02	F28F9/02		531
F28F9/028	10	{by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels}	F28F9/02	F28F9/02		539
F28F9/0282	10	{by varying the geometry of conduit ends, e.g. by using inserts or attachments for modifying the pattern of flow at the conduit inlet or outlet}	F28F9/02	F28F9/02		300
F28F2009/0285	9	{Other particular headers or end plates}	F28F9/02	F28F9/02		180
F28F2009/0287	10	{having passages for different heat exchange media}	F28F9/02	F28F9/02		255
F28F2009/029	10	{with increasing or decreasing cross-section, e.g. having conical shape}	F28F9/02	F28F9/02		271
F28F2009/0292	10	{with fins}	F28F9/02	F28F9/02		127
F28F2009/0295	10	{comprising cooling circuits}	F28F9/02	F28F9/02		33
F28F2009/0297	10	{Side headers, e.g. for radiators having conduits laterally connected to common header}	F28F9/02	F28F9/02		171
F28F9/04	9	Arrangements for sealing elements into header boxes or end plates {(arrangements for sealing flow lines connectors to header boxes F28F9/0248)}	F28F9/04	F28F9/04		462
F28F9/06	10	by dismountable joints	F28F9/06	F28F9/06		423
F28F9/08	11	by wedge-type connections, e.g. taper ferrule	F28F9/08	F28F9/08		61
F28F9/10	11	by screw-type connections, e.g. gland	F28F9/10	F28F9/10		613
F28F9/12	11	by flange-type connections	F28F9/12	F28F9/12		334
F28F9/14	11	by force-joining	F28F9/14	F28F9/14		285
F28F9/16	10	by permanent joints, e.g. by rolling (metal-working procedures in general B21, B32; particularly B21D39/06, B23K)	F28F9/16	F28F9/16		487
F28F9/162	11	{by using bonding or sealing substances, e.g. adhesives (F28F9/18 takes precedence)}	F28F9/16	F28F9/16		333
F28F9/165	11	{by using additional preformed parts, e.g. sleeves, gaskets (F28F9/185 takes precedence)}	F28F9/16	F28F9/16		252
F28F9/167	12	{the parts being inserted in the heat-exchange conduits}	F28F9/16	F28F9/16		148
F28F9/18	11	by welding	F28F9/18	F28F9/18		1620
F28F9/182	12	{the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments}	F28F9/18	F28F9/18		670
F28F9/185	12	{with additional preformed parts}	F28F9/18	F28F9/18		200
F28F9/187	12	{at least one of the parts being non-metallic, e.g. heat-sealing plastic elements}	F28F9/18	F28F9/18		112
F28F9/20	8	Arrangements of heat reflectors, e.g. separately-insertible reflecting walls	F28F9/20	F28F9/20		87
F28F9/22	8	Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates	F28F9/22	F28F9/22		3700
F28F2009/222	9	{Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit}	F28F9/22	F28F9/22		506
F28F2009/224	10	{Longitudinal partitions}	F28F9/22	F28F9/22		501
F28F2009/226	10	{Transversal partitions}	F28F9/22	F28F9/22		923
F28F2009/228	10	{Oblique partitions}	F28F9/22	F28F9/22		220
F28F9/24	8	Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates (F28F1/38 takes precedence; in general F15D)	F28F9/24	F28F9/24		1667
F28F9/26	8	Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators (connecting different sections in water heaters F24H9/14{, connecting headers with inlet or outlet fittings F28F9/0246})	F28F9/26	F28F9/26		3903
F28F9/262	9	{for radiators (F28D1/0408 takes precedence)}	F28F9/26	F28F9/26		1418
F28F9/264	10	{by sleeves, nipples}	F28F9/26	F28F9/26		293
F28F9/266	10	{by screw-type connections}	F28F9/26	F28F9/26		373
F28F9/268	10	{by permanent joints, e.g. by welding}	F28F9/26	F28F9/26		597
F28F11/00	7	Arrangements for sealing leaky tubes and conduits (stopping flow from or in pipes in general F16L55/10)	F28F11/00	F28F11/00		952
F28F11/02	8	using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence)	F28F11/02	F28F11/02		855
F28F11/04	8	using pairs of obturating elements, e.g. washers, mounted upon central operating rods (F28F11/06 takes precedence)	F28F11/04	F28F11/04		56
F28F11/06	8	using automatic tube obturating appliances	F28F11/06	F28F11/06		21
F28F13/00	7	Arrangements for modifying heat-transfer, e.g. increasing, decreasing (F28F1/00&#160;-&#160;F28F11/00 take precedence)	F28F13/00	F28F13/00		1651
F28F2013/001	8	{Particular heat conductive materials, e.g. superconductive elements}	F28F13/00	F28F13/00		188
F28F13/003	8	{by using permeable mass, perforated or porous materials (F28F13/18 takes precedence)}	F28F13/00	F28F13/00		1133
F28F2013/005	8	{Thermal joints}	F28F13/00	F28F13/00		155
F28F2013/006	9	{Heat conductive materials}	F28F13/00	F28F13/00		503
F28F2013/008	9	{Variable conductance materials;  Thermal switches}	F28F13/00	F28F13/00		368
F28F13/02	8	by influencing fluid boundary (boundary-layer control in general F15D)	F28F13/02	F28F13/02		659
F28F13/04	8	by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation {(F28F13/18 takes precedence)}	F28F13/04	F28F13/04		282
F28F13/06	8	by affecting the pattern of flow of the heat-exchange media {(F28F13/003 takes precedence; static flow control means in header boxes F28F9/026)}	F28F13/06	F28F13/06		2997
F28F13/08	9	by varying the cross-section of the flow channels	F28F13/08	F28F13/08		1138
F28F13/10	9	by imparting a pulsating motion to the flow, e.g. by sonic vibration	F28F13/10	F28F13/10		327
F28F13/12	9	by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence)	F28F13/12	F28F13/12		3106
F28F13/125	10	{by stirring}	F28F13/12	F28F13/12		986
F28F13/14	8	by endowing the walls of conduits with zones of different degrees of conduction of heat	F28F13/14	F28F13/14		259
F28F13/16	8	by applying an electrostatic field to the body of the heat-exchange medium	F28F13/16	F28F13/16		364
F28F13/18	8	by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing	F28F13/18	F28F13/18		1222
F28F13/182	9	{especially adapted for evaporator or condenser surfaces (F28F13/187 takes precedence)}	F28F13/18	F28F13/18		196
F28F13/185	9	{Heat-exchange surfaces provided with microstructures or with porous coatings}	F28F13/18	F28F13/18		512
F28F13/187	10	{especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites}	F28F13/18	F28F13/18		735
F28F17/00	7	Removing ice or water from heat-exchange apparatus	F28F17/00	F28F17/00		809
F28F17/005	8	{Means for draining condensates from heat exchangers, e.g. from evaporators (F28B9/08 takes precedence)}	F28F17/00	F28F17/00		1476
F28F19/00	7	Preventing the formation of deposits or corrosion, e.g. by using filters {or scrapers}	F28F19/00	F28F19/00		2090
F28F19/002	8	{by using inserts or attachments}	F28F19/00	F28F19/00		512
F28F19/004	8	{by using protective electric currents, voltages, cathodes, anodes, electric short-circuits}	F28F19/00	F28F19/00		311
F28F19/006	8	{Preventing deposits of ice}	F28F19/00	F28F19/00		457
F28F19/008	8	{by using scrapers}	F28F19/00	F28F19/00		433
F28F19/01	8	by using means for separating solid materials from heat-exchange fluids, e.g. filters	F28F19/01	F28F19/01		2294
F28F19/02	8	by using coatings, e.g. vitreous or enamel coatings	F28F19/02	F28F19/02		1255
F28F19/04	9	of rubber; of plastics material; of varnish	F28F19/04	F28F19/04		651
F28F19/06	9	of metal	F28F19/06	F28F19/06		1002
F28F21/00	7	Constructions of heat-exchange apparatus characterised by the selection of particular materials {(coatings for modifying heat-transfer F28F13/18; coatings for preventing the formation of deposits or corrosion F28F19/02)}	F28F21/00	F28F21/00		555
F28F21/003	8	{for domestic or space-heating systems}	F28F21/00	F28F21/00		98
F28F21/006	8	{of glass}	F28F21/00	F28F21/00		239
F28F21/02	8	of carbon, e.g. graphite	F28F21/02	F28F21/02		1160
F28F21/04	8	of ceramic; of concrete; of natural stone	F28F21/04	F28F21/04		1581
F28F21/045	9	{for domestic or space-heating systems}	F28F21/04	F28F21/04		116
F28F21/06	8	of plastics material	F28F21/06	F28F21/06		780
F28F21/061	9	{for domestic or space-heating systems}	F28F21/06	F28F21/06		51
F28F21/062	9	{the heat-exchange apparatus employing tubular conduits}	F28F21/06	F28F21/06		1151
F28F21/063	10	{for domestic or space-heating systems}	F28F21/06	F28F21/06		159
F28F21/065	9	{the heat-exchange apparatus employing plate-like or laminated conduits}	F28F21/06	F28F21/06		665
F28F21/066	10	{for domestic or space-heating systems}	F28F21/06	F28F21/06		93
F28F21/067	9	{Details}	F28F21/06	F28F21/06		750
F28F21/068	10	{for domestic or space-heating systems}	F28F21/06	F28F21/06		19
F28F21/08	8	of metal	F28F21/08	F28F21/08		1026
F28F21/081	9	{Heat exchange elements made from metals or metal alloys}	F28F21/08	F28F21/08		585
F28F21/082	10	{from steel or ferrous alloys}	F28F21/08	F28F21/08		585
F28F21/083	11	{from stainless steel}	F28F21/08	F28F21/08		859
F28F21/084	10	{from aluminium or aluminium alloys}	F28F21/08	F28F21/08		2742
F28F21/085	10	{from copper or copper alloys}	F28F21/08	F28F21/08		1302
F28F21/086	10	{from titanium or titanium alloys}	F28F21/08	F28F21/08		281
F28F21/087	10	{from nickel or nickel alloys}	F28F21/08	F28F21/08		210
F28F21/088	9	{for domestic or space-heating systems}	F28F21/08	F28F21/08		440
F28F21/089	9	{Coatings, claddings or bonding layers made from metals or metal alloys (F28F19/06 takes precedence)}	F28F21/08	F28F21/08		666
F28F23/00	7	Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions (heat-transfer, heat-exchange or heat-storage materials C09K5/00)	F28F23/00	F28F23/00		324
F28F23/02	8	Arrangements for obtaining or maintaining same in a liquid state	F28F23/02	F28F23/02		62
F28F25/00	7	Component parts of trickle coolers (arrangements for increasing heat transfer F28F13/00; controlling arrangements F28F27/00)	F28F25/00	F28F25/00		906
F28F2025/005	8	{Liquid collection;  Liquid treatment;  Liquid recirculation;  Addition of make-up liquid}	F28F25/00	F28F25/00		536
F28F25/02	8	for distributing, circulating, and accumulating liquid (spraying or atomising in general B05B, B05D)	F28F25/02	F28F25/02		1116
F28F25/04	9	Distributing or accumulator troughs	F28F25/04	F28F25/04		813
F28F25/06	9	Spray nozzles or spray pipes	F28F25/06	F28F25/06		1592
F28F25/08	9	Splashing boards or grids, e.g. for converting liquid sprays into liquid films; Elements or beds for increasing the area of the contact surface (packing elements per seB01J19/30, B01J19/32)	F28F25/08	F28F25/08		1133
F28F25/082	10	{Spaced elongated bars, laths; Supports therefor}	F28F25/08	F28F25/08		332
F28F25/085	10	{Substantially horizontal grids; Blocks}	F28F25/08	F28F25/08		189
F28F25/087	10	{Vertical or inclined sheets; Supports or spacers}	F28F25/08	F28F25/08		748
F28F25/10	8	for feeding gas or vapour	F28F25/10	F28F25/10		688
F28F25/12	9	Ducts; Guide vanes, e.g. for carrying currents to distinct zones	F28F25/12	F28F25/12		602
F28F27/00	7	Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus (control arrangements in general G05)	F28F27/00	F28F27/00		4992
F28F27/003	8	{specially adapted for cooling towers}	F28F27/00	F28F27/00		1211
F28F27/006	8	{specially adapted for regenerative heat-exchange apparatus}	F28F27/00	F28F27/00		200
F28F27/02	8	for controlling the distribution of heat-exchange media between different channels ({static flow control means in header boxes F28F9/026}; arrangements of guide plates or guide vanes F28F9/22, F28F25/12)	F28F27/02	F28F27/02		2912
F28F99/00	7	Subject matter not provided for in other groups of this subclass	F28F99/00	F28F99/00		45
F28F2200/00	7	Prediction; Simulation; Testing	CPCONLY	F28F2200/00		339
F28F2200/005	8	Testing heat pipes	CPCONLY	F28F2200/005		139
F28F2210/00	7	Heat exchange conduits	CPCONLY	F28F2210/00		63
F28F2210/02	8	with particular branching, e.g. fractal conduit arrangements	CPCONLY	F28F2210/02		394
F28F2210/04	8	Arrangements of conduits common to different heat exchange sections, the conduits having channels for different circuits	CPCONLY	F28F2210/04		50
F28F2210/06	8	having walls comprising obliquely extending corrugations, e.g. in the form of threads	CPCONLY	F28F2210/06		129
F28F2210/08	8	Assemblies of conduits having different features	CPCONLY	F28F2210/08		242
F28F2210/10	8	Particular layout, e.g. for uniform temperature distribution	CPCONLY	F28F2210/10		368
F28F2215/00	7	Fins	CPCONLY	F28F2215/00		286
F28F2215/02	8	Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media	CPCONLY	F28F2215/02		226
F28F2215/04	8	Assemblies of fins having different features, e.g. with different fin densities	CPCONLY	F28F2215/04		817
F28F2215/06	8	Hollow fins; fins with internal circuits	CPCONLY	F28F2215/06		182
F28F2215/08	8	with openings, e.g. louvers	CPCONLY	F28F2215/08		583
F28F2215/10	8	Secondary fins, e.g. projections or recesses on main fins	CPCONLY	F28F2215/10		544
F28F2215/12	8	with U-shaped slots for laterally inserting conduits	CPCONLY	F28F2215/12		331
F28F2215/14	8	in the form of movable or loose fins	CPCONLY	F28F2215/14		89
F28F2220/00	7	Closure means, e.g. end caps on header boxes or plugs on conduits	CPCONLY	F28F2220/00		684
F28F2225/00	7	Reinforcing means	CPCONLY	F28F2225/00		263
F28F2225/02	8	for casings	CPCONLY	F28F2225/02		167
F28F2225/04	8	for conduits	CPCONLY	F28F2225/04		664
F28F2225/06	8	for fins	CPCONLY	F28F2225/06		123
F28F2225/08	8	for header boxes	CPCONLY	F28F2225/08		583
F28F2230/00	7	Sealing means	CPCONLY	F28F2230/00		1030
F28F2235/00	7	Means for filling gaps between elements, e.g. between conduits within casings	CPCONLY	F28F2235/00		94
F28F2240/00	7	Spacing means	CPCONLY	F28F2240/00		763
F28F2245/00	7	Coatings; Surface treatments	CPCONLY	F28F2245/00		251
F28F2245/02	8	hydrophilic	CPCONLY	F28F2245/02		746
F28F2245/04	8	hydrophobic	CPCONLY	F28F2245/04		427
F28F2245/06	8	having particular radiating, reflecting or absorbing features, e.g. for improving heat transfer by radiation	CPCONLY	F28F2245/06		250
F28F2245/08	8	self-cleaning	CPCONLY	F28F2245/08		63
F28F2250/00	7	Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns	CPCONLY	F28F2250/00		109
F28F2250/02	8	Streamline-shaped elements	CPCONLY	F28F2250/02		248
F28F2250/04	8	Communication passages between channels	CPCONLY	F28F2250/04		142
F28F2250/06	8	Derivation channels, e.g. bypass	CPCONLY	F28F2250/06		766
F28F2250/08	8	Fluid driving means, e.g. pumps, fans	CPCONLY	F28F2250/08		962
F28F2250/10	8	Particular pattern of flow of the heat exchange media	CPCONLY	F28F2250/10		115
F28F2250/102	9	with change of flow direction	CPCONLY	F28F2250/102		729
F28F2250/104	9	with parallel flow	CPCONLY	F28F2250/104		335
F28F2250/106	9	with cross flow	CPCONLY	F28F2250/106		113
F28F2250/108	9	with combined cross flow and parallel flow	CPCONLY	F28F2250/108		291
F28F2255/00	7	Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes	CPCONLY	F28F2255/00		214
F28F2255/02	8	Flexible elements	CPCONLY	F28F2255/02		419
F28F2255/04	8	comprising shape memory alloys or bimetallic elements	CPCONLY	F28F2255/04		179
F28F2255/06	8	composite, e.g. polymers with fillers or fibres	CPCONLY	F28F2255/06		205
F28F2255/08	8	pressed; stamped; deep-drawn	CPCONLY	F28F2255/08		193
F28F2255/10	8	made by hydroforming	CPCONLY	F28F2255/10		44
F28F2255/12	8	expanded or perforated metal plate	CPCONLY	F28F2255/12		62
F28F2255/14	8	molded	CPCONLY	F28F2255/14		194
F28F2255/143	9	injection molded	CPCONLY	F28F2255/143		196
F28F2255/146	9	overmolded	CPCONLY	F28F2255/146		83
F28F2255/16	8	extruded	CPCONLY	F28F2255/16		676
F28F2255/18	8	sintered	CPCONLY	F28F2255/18		428
F28F2255/20	8	with nanostructures	CPCONLY	F28F2255/20		173
F28F2260/00	7	Heat exchangers or heat exchange elements having special size, e.g. microstructures	CPCONLY	F28F2260/00		172
F28F2260/02	8	having microchannels	CPCONLY	F28F2260/02		1035
F28F2265/00	7	Safety or protection arrangements; Arrangements for preventing malfunction	CPCONLY	F28F2265/00		223
F28F2265/02	8	in the form of screens or covers	CPCONLY	F28F2265/02		172
F28F2265/06	8	by using means for draining heat exchange media from heat exchangers	CPCONLY	F28F2265/06		147
F28F2265/10	8	for preventing overheating, e.g. heat shields	CPCONLY	F28F2265/10		230
F28F2265/12	8	for preventing overpressure	CPCONLY	F28F2265/12		238
F28F2265/14	8	for preventing damage by freezing, e.g. for accommodating volume expansion	CPCONLY	F28F2265/14		289
F28F2265/16	8	for preventing leakage	CPCONLY	F28F2265/16		496
F28F2265/18	8	for removing contaminants, e.g. for degassing	CPCONLY	F28F2265/18		244
F28F2265/20	8	for preventing development of microorganisms	CPCONLY	F28F2265/20		233
F28F2265/22	8	for draining	CPCONLY	F28F2265/22		145
F28F2265/24	8	for electrical insulation	CPCONLY	F28F2265/24		73
F28F2265/26	8	for allowing differential expansion between elements	CPCONLY	F28F2265/26		1186
F28F2265/28	8	for preventing noise	CPCONLY	F28F2265/28		275
F28F2265/30	8	for preventing vibrations	CPCONLY	F28F2265/30		357
F28F2265/32	8	for limiting movements, e.g. stops, locking means	CPCONLY	F28F2265/32		132
F28F2270/00	7	Thermal insulation; Thermal decoupling	CPCONLY	F28F2270/00		933
F28F2270/02	8	by using blind conduits	CPCONLY	F28F2270/02		82
F28F2275/00	7	Fastening; Joining	CPCONLY	F28F2275/00		97
F28F2275/02	8	by using bonding materials; by embedding elements in particular materials	CPCONLY	F28F2275/02		257
F28F2275/025	9	by using adhesives	CPCONLY	F28F2275/025		742
F28F2275/04	8	by brazing	CPCONLY	F28F2275/04		1632
F28F2275/045	9	with particular processing steps, e.g. by allowing displacement of parts during brazing or by using a reservoir for storing brazing material	CPCONLY	F28F2275/045		228
F28F2275/06	8	by welding	CPCONLY	F28F2275/06		1202
F28F2275/061	9	by diffusion bonding	CPCONLY	F28F2275/061		113
F28F2275/062	9	by impact pressure or friction welding	CPCONLY	F28F2275/062		83
F28F2275/064	9	by induction welding or by using microwaves	CPCONLY	F28F2275/064		21
F28F2275/065	9	by ultrasonic or vibration welding	CPCONLY	F28F2275/065		71
F28F2275/067	9	by laser welding	CPCONLY	F28F2275/067		180
F28F2275/068	9	by explosive welding	CPCONLY	F28F2275/068		30
F28F2275/08	8	by clamping or clipping	CPCONLY	F28F2275/08		378
F28F2275/085	9	with snap connection	CPCONLY	F28F2275/085		494
F28F2275/10	8	by force joining	CPCONLY	F28F2275/10		106
F28F2275/12	8	by methods involving deformation of the elements	CPCONLY	F28F2275/12		220
F28F2275/122	9	by crimping, caulking or clinching	CPCONLY	F28F2275/122		420
F28F2275/125	9	by bringing elements together and expanding	CPCONLY	F28F2275/125		189
F28F2275/127	9	by shrinking	CPCONLY	F28F2275/127		35
F28F2275/14	8	by using form fitting connection, e.g. with tongue and groove	CPCONLY	F28F2275/14		555
F28F2275/143	9	with pin and hole connections	CPCONLY	F28F2275/143		172
F28F2275/146	9	with bayonet connections	CPCONLY	F28F2275/146		75
F28F2275/16	8	with toothed elements, e.g. with serrations	CPCONLY	F28F2275/16		45
F28F2275/18	8	by using wedge effect	CPCONLY	F28F2275/18		23
F28F2275/20	8	with threaded elements	CPCONLY	F28F2275/20		611
F28F2275/205	9	with of tie-rods	CPCONLY	F28F2275/205		173
F28F2275/22	8	by using magnetic effect	CPCONLY	F28F2275/22		29
F28F2280/00	7	Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts	CPCONLY	F28F2280/00		240
F28F2280/02	8	Removable elements	CPCONLY	F28F2280/02		452
F28F2280/04	8	Means for preventing wrong assembling of parts	CPCONLY	F28F2280/04		231
F28F2280/06	8	Adapter frames, e.g. for mounting heat exchanger cores on other structure and for allowing fluidic connections	CPCONLY	F28F2280/06		287
F28F2280/08	8	Tolerance compensating means	CPCONLY	F28F2280/08		61
F28F2280/10	8	Movable elements, e.g. being pivotable	CPCONLY	F28F2280/10		194
F28F2280/105	9	with hinged connections	CPCONLY	F28F2280/105		153
