IPC 6 English version F28F-F28F 27/02

F28F-F28F02702

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

F 28

HEAT EXCHANGE IN GENERAL (arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F 24 F 13/30)

F 28 F

DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water or air traps, air venting F 16)

Tubular elements; Assemblies of tubular elements (specially adapted for movement F 28 F 5/00)

Tubular elements of cross-section which is non-circular (F 28 F 1/08, F 28 F 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 F 28 F 1/06, F 28 F 1/08)

the means being only outside the tubular element

and extending longitudinally (F 28 F 1/38 takes precedence)

the means being integral with the element, e.g. formed by extrusion (F 28 F 1/22 takes precedence)

the element being built-up from finned sections

the means being attachable to the element (F 28 F 1/22 takes precedence)

the means having portions engaging further tubular elements

and extending transversely (F 28 F 1/38 takes precedence)

the means being integral with the element (F 28 F 1/32 takes precedence)

the element being built-up from finned sections

the means being attachable to the element (F 28 F 1/32 takes precedence)

the means having portions engaging further tubular elements

and extending obliquely (F 28 F 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 F 28 F 5/00)

Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F 28 F 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 B 23 P)

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 F 28 F 1/00, F 28 F 3/00, or F 28 F 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 F 16 L 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 B 21, B 23, particularly B 21 D 39/06, B 23 K)

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 (F 28 F 1/38 takes precedence; in general F 15 D)

Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators (connecting different sections in water heaters F 24 H 9/14)

11/

Arrangements for sealing leaky tubes or conduits (stopping flow from or in pipes in general F 16 L 55/10)

11/

using obturating elements, e.g. washers, inserted and operated independently of each other (F 28 F 11/06 takes precedence)

11/

using pairs of obturating elements, e.g. washers, mounted upon central operating rods (F 28 F 11/06 takes precedence)

11/

using automatic tube-obturating appliances

13/

Arrangements for modifying heat transfer, e.g. increasing, decreasing (F 28 F 1/00 to F 28 F 11/00 take precedence)

13/

by influencing fluid boundary (boundary-layer control in general F 15 D)

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 (F 28 F 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

23/

Arrangements for obtaining or maintaining same in a liquid state

25/

Component parts of trickle coolers (arrangements for increasing heat transfer F 28 F 13/00; controlling arrangements F 28 F 27/00)

25/

for distributing, circulating, or accumulating liquid (spraying or atomising in general B 05 B, B 05 D)

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 B 01 J 19/30, B 01 J 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 (control arrangements in general G 05)

27/

for controlling the distribution of heat-exchange media between different channels (arrangements of guide plates or guide vanes F 28 F 9/22, F 28 F 25/12)