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IPC 7
F28D-F28D02100

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 DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general application F28F); HEAT STORAGE PLANTS OR APPARATUS IN GENERAL  [4]


Subclass Index

HEAT-EXCHANGE APPARATUS WITHOUT INTERMEDIATE HEAT-TRANSFER MEDIA OR BODIES 

With stationary conduit assemblies 

for only one medium using: mass of fluid; trickle or film; the cooling effect of evaporation 

F28D 1/00; F28D 3/00; F28D 5/00 

for both media: by tubular conduits; by plate-like conduits 

F28D 7/00; F28D 9/00 

With moving conduit assemblies 

F28D 11/00 

With fluidised bed 

F28D 13/00 

HEAT-EXCHANGE APPARATUS WITH INTERMEDIATE HEAT-TRANSFER MEDIA OR BODIES 

With the intermediate medium in closed tubes passing into or through the conduit walls 

F28D 15/00 

In which the intermediate medium or body is contacted successively by the other media 

F28D 17/00, F28D 19/00 

HEAT STORAGE PLANTS OR APPARATUS 

F28D 20/00 

OTHER HEAT-EXCHANGE APPARATUS 

F28D 21/00 



1/

00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators (F28D 5/00 takes precedence)

1/

02.with the heat-exchange conduits immersed in the body of fluid

1/

03..with plate-like or laminated conduits  [4]

1/

04..with tubular conduits

1/

047...the conduits being bent, e.g. in a serpentine or zig-zag  [4]

1/

053...the conduits being straight  [4]

1/

06.with the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid


3/

00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits (F28D 5/00 takes precedence)

3/

02.with tubular conduits

3/

04.Distributing arrangements


5/

00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation

5/

02.in which the evaporating medium flows in a continuous film or trickles freely over the conduits


7/

00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

7/

02.the conduits being helically coiled (F28D 7/10 takes precedence)

7/

04.the conduits being spirally coiled (F28D 7/10 takes precedence)

7/

06.the conduits having a single U-bend (F28D 7/10 takes precedence)

7/

08.the conduits being otherwise bent, e.g. in a serpentine or zig-zag (F28D 7/10 takes precedence)

7/

10.the conduits being arranged one within the other, e.g. concentrically

7/

12..the surrounding tube being closed at one end, i.e. return type (F28D 7/14 takes precedence)

7/

14..both tubes being bent

7/

16.the conduits being arranged in parallel spaced relation (F28D 7/02 to F28D 7/10 take precedence)  [4]


9/

00Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

9/

02.the heat-exchange media travelling at an angle to one another (F28D 9/04 takes precedence)

9/

04.the conduits being formed by spirally-wound plates or laminae


11/

00Heat-exchange apparatus employing moving conduits

11/

02.the movement being rotary, e.g. performed by a drum or roller (F28D 11/08 takes precedence)

11/

04..performed by a tube or a bundle of tubes

11/

06.the movement being reciprocating or oscillating (F28D 11/08 takes precedence)

11/

08.more than one conduit assembly performing independent movements, e.g. rotary bundle of tubes in a rotary drum


13/

00Heat-exchange apparatus using a fluidised bed


Heat-exchange apparatus employing intermediate heat-transfer media or bodies  [3]


15/

00Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls

15/

02.in which the medium condenses and evaporates, e.g. heat-pipes  [4]

15/

04..with tubes having a capillary structure  [6]

15/

06..Control arrangements therefor  [6]


17/

00Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles

17/

02.using rigid bodies, e.g. of porous material

17/

04.Distributing arrangements for the heat-exchange media


19/

00Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium

19/

02.using granular particles

19/

04.using rigid bodies, e.g. mounted on a movable carrier


20/

00Heat storage plants or apparatus in general (specially adapted for particular applications, see the relevant places, e.g. F24D 15/02); Regenerative heat-exchange apparatus not covered by groups F28D 17/00 or F28D 19/00  [4]

20/

02.using latent heat  [6]



21/

00Heat-exchange apparatus not covered by any of the groups F28D 1/00 to F28D 20/00  [4]


  
 

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