IPC 7 English version F28F-F28F 27/02

F28F-F28F02702

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 28

HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F24F 13/30)

F 28 F

DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water or air traps, air venting F16)

Subclass Index

DETAILS AND THEIR ARRANGEMENTS

Elements for heat exchange or transfer and assemblies thereof

tubular; plate-like; for movement; others

F28F 1/00; F28F 3/00; F28F 5/00; F28F 7/00

auxiliary supports for elements; sealing

F28F 9/00; F28F 11/00

Casings and header boxes

F28F 9/00

Preventing deposits or corrosion

F28F 17/00, F28F 19/00

Special features of heat-exchange apparatus

characterised by the selection of: constructional material; intermediate heat-exchange material

F28F 21/00; F28F 23/00

component parts of trickle coolers

F28F 25/00

MODIFYING HEAT-TRANSFER; CONTROL OF APPARATUS

F28F 13/00; F28F 27/00

Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F 5/00)

Tubular elements of cross-section which is non-circular (F28F 1/08, F28F 1/10 take precedence)

polygonal, e.g. rectangular

crimped or corrugated in cross-section

Tubular elements crimped or corrugated in longitudinal section

Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F 1/06, F28F 1/08)

the means being only outside the tubular element

and extending longitudinally (F28F 1/38 takes precedence)

the means being integral with the element, e.g. formed by extrusion (F28F 1/22 takes precedence)

the element being built-up from finned sections

the means being attachable to the element (F28F 1/22 takes precedence)

the means having portions engaging further tubular elements

and extending transversely (F28F 1/38 takes precedence)

the means being integral with the element (F28F 1/32 takes precedence)

the element being built-up from finned sections

the means being attachable to the element (F28F 1/32 takes precedence)

the means having portions engaging further tubular elements

and extending obliquely (F28F 1/38 takes precedence)

the means being helically-wound fins or wire spirals

and being staggered to form tortuous fluid passages

the means being only inside the tubular element

the means being both outside and inside the tubular element

and being formed of wire mesh

Plate-like or laminated elements; Assemblies of plate-like or laminated elements (specially adapted for movement F28F 5/00)

Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F 3/08 takes precedence)

the means being integral with the element

the means being attachable to the element

Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning

Arrangement for sealing the margins

Elements constructed in the shape of a hollow panel, e.g. with channels

by separating portions of a pair of joined sheets to form channels, e.g. by inflation (manufacture thereof B23P)

Elements specially adapted for movement (arrangements for moving the elements, see the appropriate subclass for the apparatus concerned)

Rotary drums or rollers

Hollow impellers, e.g. stirring vane

Hollow screw conveyers

Elements not covered by group F28F 1/00, F28F 3/00, or F28F 5/00

Blocks traversed by passages for heat-exchange media

Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings

007

Auxiliary supports for elements [6]

013

for tubes or tube-assemblies [6]

Header boxes; End plates

Arrangements for sealing elements into header boxes or end plates (joining pipes to walls in general F16L 41/00)

by dismountable joints

by wedge-type connections, e.g. taper ferrule

by screw-type connections, e.g. gland

by flange-type connections

by force-joining

by permanent joints, e.g. by rolling (metal-working procedures in general B21, B23, particularly B21D 39/06, B23K)

by welding

Arrangements of heat reflectors, e.g. separately-insertible reflecting walls

Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates (F28F 1/38 takes precedence; in general F15D)

Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators (connecting different sections in water heaters F24H 9/14)

11/

Arrangements for sealing leaky tubes or conduits (stopping flow from or in pipes in general F16L 55/10)

11/

using obturating elements, e.g. washers, inserted and operated independently of each other (F28F 11/06 takes precedence)

11/

using pairs of obturating elements, e.g. washers, mounted upon central operating rods (F28F 11/06 takes precedence)

11/

using automatic tube-obturating appliances

13/

Arrangements for modifying heat transfer, e.g. increasing, decreasing (F28F 1/00 to F28F 11/00 take precedence)

13/

by influencing fluid boundary (boundary-layer control in general F15D)

13/

by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation

13/

by affecting the pattern of flow of the heat-exchange media

13/

by varying the cross-section of the flow channels

13/

by imparting a pulsating motion to the flow, e.g. by sonic vibration

13/

by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F 13/08 takes precedence)

13/

by endowing the walls of conduits with zones of different degrees of conduction of heat

13/

by applying an electrostatic field to the body of the heat-exchange medium

13/

by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing

17/

Removing ice or water from heat-exchange apparatus

19/

Preventing the formation of deposits or corrosion, e.g. by using filters

19/

by using means for separating solid materials from heat-exchange fluids, e.g. filters [6]

19/

by using coatings, e.g. vitreous or enamel coatings

19/

of rubber; of plastics material; of varnish

19/

of metal

21/

Constructions of heat-exchange apparatus characterised by the selection of particular materials

21/

of carbon, e.g. graphite

21/

of ceramic; of concrete; of natural stone

21/

of plastics material

21/

of metal

23/

Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions (heat-transfer, heat-exchange or heat-storage materials C09K 5/00)

23/

Arrangements for obtaining or maintaining same in a liquid state

25/

Component parts of trickle coolers (arrangements for increasing heat transfer F28F 13/00; controlling arrangements F28F 27/00)

25/

for distributing, circulating, or accumulating liquid (spraying or atomising in general B05B, B05D)

25/

Distributing or accumulator troughs

25/

Spray nozzles or spray pipes

25/

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 in general B01J 19/30, B01J 19/32)

25/

for feeding gas or vapour

25/

Ducts; Guide vanes, e.g. for carrying currents to distinct zones

27/

Control arrangements specially adapted for heat-exchange or heat-transfer apparatus

27/

for controlling the distribution of heat-exchange media between different channels (arrangements of guide plates or guide vanes F28F 9/22, F28F 25/12)