CPC Definition - Subclass F28C

Last Updated Version: 2016.11
HEAT-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 - F28D 19/00; details of heat-exchange apparatus of general application F28F)
Definition statement

This place covers:

Heat exchangers involving heat transfer between different media without separating wall, e.g. cooling towers.

References
Limiting references

This place does not cover:

Mixers

B01F

Chemical or physical processes

B01J

Fluid heaters having heat generating means

F24H

Regenerative heat exchangers

F28D 17/00, F28D 19/00

Latent heat storage in direct contact with a heat exchange medium or another latent heat storage medium

F28D 20/02

Direct-contact trickle coolers, e.g. cooling towers (building construction E04H 5/12; enclosed spaces cooled by trickle F25; components parts of trickle coolers F28F 25/00; {indirect-contact cooling towers F28B 1/06})
Definition statement

This place covers:

Heat exchangers in which one medium trickles freely over a material and is brought into direct contact with a cooling medium. e.g. ambient air.

Cooling towers are classified according to the type of flow: counter-current, cross-current or both.

This group covers also:

  • The use of cooling towers for discharging exhaust gases.
  • Means for recovering heat from exhaust steam.
  • Noise suppressing means.
  • Freezing prevention means.
  • Combination wet/ dry sections (hybrid cooling towers).
  • Means for preventing mist formation above cooling towers.
References
Limiting references

This place does not cover:

Building construction of cooling towers

E04H 5/12

Enclosed spaces cooled by trickle

F25

Dry cooling towers

F28B 1/06

Indirect contact heat exchangers in which one medium trickles freely over conduits

F28D 3/00

Indirect evaporative cooler

F28D 5/00

Component parts of trickle coolers

F28F 25/00

Other direct-contact heat-exchange apparatus
Definition statement

This place covers:

Direct contact heat exchangers without trickling of one heat exchange medium, e.g. direct contact between two gases , between two liquids or between a liquid and a gas without or with change of state; one of the heat exchange medium being a fluent solid, e.g. direct contact fluidized bed.

References
Limiting references

This place does not cover:

Preservation of food by heating loose materials

A23L 3/16

Evaporating with heated gases or vapours or liquids in contact with a liquid

B01D 1/14

Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping

B01D 3/00

Mixing gases with liquids

B01F 3/04

Devices using other cold materials

F25D 3/00

Furnaces, ovens with cooling grates, endless belts, rotary drums

F27D 15/02

Direct contact condensers

F28B 3/00

Indirect contact fluidized bed

F28D 13/00