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IPC 7
F28C-F28C00318

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 CHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION (safety devices in general F16P; fluid heaters having heat generating means F24H; with an intermediate heat-transfer medium coming into direct contact with heat-exchange media F28D 15/00 to F28D 19/00; details of heat-exchange apparatus of general application F28F)



1/

00Direct-contact trickle coolers, e.g. cooling towers (building construction E04H 5/12; enclosed spaces cooled by trickle F25; component parts of trickle coolers F28F 25/00)

1/

02.with counter-current only

1/

04.with cross-current only

1/

06.with both counter-current and cross-current

1/

08.Arrangements for recovering heat from exhaust steam

1/

10.Arrangements for suppressing noise  [5]

1/

12.Arrangements for preventing clogging by frost  [3]

1/

14.comprising also a non-direct contact heat exchange  [3]

1/

16.Arrangements for preventing condensation, precipitation or mist formation, outside the cooler (F28C 1/14 takes precedence)  [3]


3/

00Other direct-contact heat-exchange apparatus

3/

02.the heat-exchange media both being gases or vapours

3/

04.the heat-exchange media both being liquids

3/

06.the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22)

3/

08..with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure F22)

3/

10.one heat-exchange medium at least being a fluent solid, e.g. a particulate material

3/

12..the heat-exchange medium being a particulate material and a gas, vapour, or liquid

3/

14...the particulate material moving by gravity, e.g. down a tube

3/

16...the particulate material forming a bed, e.g. fluidised, on vibratory sieves

3/

18...the particulate material being contained in rotating drums


  
 

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