IPC 7 English version F24J !A-F24J 3/08

F24J-F24J00308

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

F 24

HEATING; RANGES; VENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60 to B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)

F 24 J

PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR (materials therefor C09K 5/00; engines or other mechanisms for producing mechanical power from heat, see the relevant classes, e.g. F03G for using natural heat)

Note

Processes using enzymes or micro-organisms in order to:

(i)

liberate, separate or purify a pre-existing compound or composition, or to

(ii)

treat textiles or clean solid surfaces of materials

are further classified in subclass C12S. [5]

Apparatus or devices using heat produced by exothermal chemical reactions other than by combustion (for cooking-vessels A47J 36/28; self-heating compresses A61F 7/03; materials for the production of heat or cold undergoing non-reversible chemical reactions, other than by combustion, when used C09K 5/18)

Use of solar heat, e.g. solar heat collectors (distillation or evaporation of water using solar energy C02F 1/14; roof covering aspects of energy collecting devices E04D 13/18; devices for producing mechanical power from solar energy F03G 6/00; semi-conductor devices adapted for converting solar energy into electrical energy H01L 25/00, H01L 31/00; semiconductor devices including arrays of solar cells using heat energy H01L 31/058; generators in which light radiation is directly converted into electrical energy H02N 6/00) [4,5]

Solar heat collectors with support for article heated, e.g. stoves, ranges, crucibles, furnaces or ovens using solar heat [4]

Solar heat collectors having working fluid conveyed through collector [4]

surrounded by a transparent enclosure, e.g. evacuated solar collectors [6]

having concentrating elements (optical elements or systems per se G02B) [4]

Receivers working at high temperature, e.g. for solar power plants [6]

having lenses as concentrating elements [4]

having reflectors as concentrating elements [4]

parabolic [4]

hemispherical [6]

semi-cylindrical or cylindro-parabolic [4]

conical [6]

having flat plates [4]

spaced, opposed interacting reflecting surfaces [4]

the working fluid being conveyed between plates [4]

having extended surfaces, e.g. protrusions, corrugations (F24J 2/28 takes precedence) [4]

the working fluid trickling freely over collector elements [6]

the working fluid being conveyed through tubular heat absorbing conduits [4]

having extended surfaces, e.g. protrusions (F24J 2/28 takes precedence) [4]

having permeable mass, foraminous or porous materials [4]

with means to exchange heat between plural fluids [4]

having evaporator and condenser section, e.g. heat pipe [4]

having heat storage mass [4]

Rollable or foldable collector units [4]

employing tracking means (F24J 2/02, F24J 2/06 take precedence; rotary supports or mountings therefor F24J 2/54; direction-finders for determining the direction from which electromagnetic waves are being received G01S 3/78; control of position or direction G05D 3/00) [4]

Control arrangements [4]

Solar heat systems not otherwise provided for [4]

having thermosiphonic circulation [4]

Component parts, details or accessories of solar heat collectors [4]

characterised by the absorber material [4]

Transparent coverings [4]

Thermal insulation (F24J 2/50 takes precedence) [6]

Arrangement of mountings or supports [4]

specially adapted for rotary movement [6]

Other production or use of heat, not derived from combustion (use of solar heat F24J 2/00)

using natural heat [4]

using geothermal heat (devices for producing mechanical power from geothermal energy F03G 4/00) [4,5]