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IPC 7
F28F-F28F02702

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


F 28HEAT 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 FDETAILS 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 



1/

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

1/

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

1/

04..polygonal, e.g. rectangular

1/

06..crimped or corrugated in cross-section

1/

08.Tubular elements crimped or corrugated in longitudinal section

1/

10.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)

1/

12..the means being only outside the tubular element

1/

14...and extending longitudinally (F28F 1/38 takes precedence)

1/

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

1/

18.....the element being built-up from finned sections

1/

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

1/

22....the means having portions engaging further tubular elements

1/

24...and extending transversely (F28F 1/38 takes precedence)

1/

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

1/

28.....the element being built-up from finned sections

1/

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

1/

32....the means having portions engaging further tubular elements

1/

34...and extending obliquely (F28F 1/38 takes precedence)

1/

36....the means being helically-wound fins or wire spirals

1/

38...and being staggered to form tortuous fluid passages

1/

40..the means being only inside the tubular element

1/

42..the means being both outside and inside the tubular element

1/

44...and being formed of wire mesh


3/

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

3/

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

3/

04..the means being integral with the element

3/

06..the means being attachable to the element

3/

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

3/

10..Arrangement for sealing the margins

3/

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

3/

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


5/

00Elements specially adapted for movement (arrangements for moving the elements, see the appropriate subclass for the apparatus concerned)

5/

02.Rotary drums or rollers

5/

04.Hollow impellers, e.g. stirring vane

5/

06.Hollow screw conveyers


7/

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

7/

02.Blocks traversed by passages for heat-exchange media


9/

00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings

9/

007.Auxiliary supports for elements  [6]

9/

013..for tubes or tube-assemblies  [6]

9/

02.Header boxes; End plates

9/

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

9/

06...by dismountable joints

9/

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

9/

10....by screw-type connections, e.g. gland

9/

12....by flange-type connections

9/

14....by force-joining

9/

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

9/

18....by welding

9/

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

9/

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

9/

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

9/

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


11/

00Arrangements for sealing leaky tubes or conduits (stopping flow from or in pipes in general F16L 55/10)

11/

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

11/

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

11/

06.using automatic tube-obturating appliances


13/

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

13/

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

13/

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

13/

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

13/

08..by varying the cross-section of the flow channels

13/

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

13/

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

13/

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

13/

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

13/

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


17/

00Removing ice or water from heat-exchange apparatus


19/

00Preventing the formation of deposits or corrosion, e.g. by using filters

19/

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

19/

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

19/

04..of rubber; of plastics material; of varnish

19/

06..of metal


21/

00Constructions of heat-exchange apparatus characterised by the selection of particular materials

21/

02.of carbon, e.g. graphite

21/

04.of ceramic; of concrete; of natural stone

21/

06.of plastics material

21/

08.of metal


23/

00Features 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/

02.Arrangements for obtaining or maintaining same in a liquid state


25/

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

25/

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

25/

04..Distributing or accumulator troughs

25/

06..Spray nozzles or spray pipes

25/

08..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/

10.for feeding gas or vapour

25/

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


27/

00Control arrangements specially adapted for heat-exchange or heat-transfer apparatus

27/

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


  
 

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