F
SECTION F — MECHANICAL ENGINEERING
;
LIGHTING
;
HEATING
;
WEAPONS
;
BLASTING
LIGHTING AND HEATING
F28
HEAT EXCHANGE IN GENERAL
F28
Note(s)
Apparatus using heat exchange or heat transfer (as defined below) for specific purposes is classified either in sub-class
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F28B
or in the appropriate sub-classes of, for example, classes
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F22
,
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F24
,
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F25
,
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F26
, or
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F27
; if no such other sub-class is appropriate, such apparatus is classified in sub-clas
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F28C
or
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F28D
.
In this class, the following terms are used with the meanings indicated:
"Heat exchange" means the heating or cooling of a fluid or fluent solid by direct or indirect contact with a heated or cooled fluid or fluent solid.
"Heat transfer" means the heating or cooling of a fluid or fluent solid by direct contact with a heated or cooled surface or body.
F28B
STEAM OR VAPOUR CONDENSERS
(condensation of vapours
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B01D 5/00
; steam engine plants having condensers
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F01K
; liquefaction of gases
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F25J
; details of heat-exchange and heat-transfer arrangements of general application
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F28F
)
F28C
HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUB-CLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
(safety devices in general
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F16P
; with an intermediate heat-transfer medium coming into direct contact with heat-exchange media
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F28D 13/00
-
F28D 19/00
; details of heat-exchange apparatus of general application
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F28F
)
F28D
HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUB-CLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
(furnaces
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F27
; details of heat-exchange apparatus of general application
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F28F
)
F28F
DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
(water and air traps, air venting
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F16
)
F28G
CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS
(cleaning pipes or tubes in general
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B08B
; cleaning furnace tubes, cleaning flues or chimneys
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F23J
; removing ice from heat-exchange apparatus
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F28F 17/00
)