| ReturnTo Theme-Group-Choice | Onelevelup |
| 3L028 | Direct air heating by heater or combustion gas | |
| F24H3/00 -3/04,304@Z | ||
| F24H3/04,301 | AA | AA00 TYPES OF OPEN AIR HEATER |
AA01 | AA02 | AA03 | AA04 | ||||||
| . Blasting heated air from the upper side | . Blasting heated air from the lower side | . Blasting heated air axially | . Others | |||||||||
| AB | AB00 STRUCTURE OF BURNER |
AB01 | AB02 | AB03 | AB04 | AB05 | ||||||
| . Radiation structure | . Secondary electric heaters | . Measures for exhaust gas | . . Catalysts | . Others | ||||||||
| AC | AC00 STRUCTURE OF VENTILATOR |
AC01 | AC02 | AC03 | AC04 | AC05 | AC06 | |||||
| . Mixture of convection air and exhaust gas | . Noise control | . Improvement of heat exchange | . Cooling of casing | . Cooling of electrical apparatus | . Others | |||||||
| F24H3/04,302 | BA | BA00 TYPES OF ELECTRIC AIR HEATER |
BA01 | BA02 | BA03 | |||||||
| . With tubular heating element | . With planar heating element | . Others | ||||||||||
| BB | BB00 ARRANGEMENT OF HEATING ELEMENT |
BB01 | BB02 | BB03 | BB04 | BB05 | ||||||
| . Parallel arrangement | . Combination of parallel and series arrangements | . Combination of different heating elements | . Combination of heating element and fan | . Others | ||||||||
| BC | BC00 STRUCTURE OF HEATER |
BC01 | BC02 | |||||||||
| . Radiation structure | . . Reflecting plate | |||||||||||
| BD | BD00 STRUCTURE OF VENTILATOR |
BD01 | BD02 | BD03 | ||||||||
| . Mixture of convection air and heated air | . Cooling of electrical apparatus on casing | . Others | ||||||||||
| F24H3/04,303@A;3/04,303@B;3/04,303@Z | CA | CA00 TYPES OF SEMICONDUCTOR AIR HEATERS |
CA01 | CA02 | CA03 | CA04 | ||||||
| . Honeycomb structure | . Plate structure | . . Radiating member | . Others | |||||||||
| CB | CB00 INSTALLATION AND ARRANGEMENT OF SEMICONDUCTOR AIR HEATER |
CB01 | CB02 | CB03 | ||||||||
| . Combination of other heating elements | . Installation of electrodes | . Others | ||||||||||
| CC | CC00 STRUCTURE OF VENTILATOR |
CC01 | CC02 | CC03 | CC04 | |||||||
| . Bypasses | . Shutters | . Changeable angle of installation of semiconductor air heater | . Others | |||||||||
| F24H3/04,304@A;3/04,304@B;3/04,304@Z | DA | DA00 TYPES OF AIR-HEATING FOOT WARMERS |
DA01 | DA02 | DA03 | DA04 | ||||||
| . Infrared heaters | . Semiconductor air heaters | . Combination of different heaters | . Others | |||||||||
| DB | DB00 INSTALLATION AND ARRANGEMENT OF HEATER |
DB01 | DB02 | DB03 | ||||||||
| . Heaters and fans forming integral units | . Installation on legs | . Others | ||||||||||
| DC | DC00 STRUCTURE OF VENTILATOR |
DC01 | DC02 | DC03 | DC04 | DC05 | ||||||
| . Reflecting and air guiding plates | . Installation and arrangement of fan | . Odor prevention | . Cooling of motor and frame | . Others | ||||||||
| F24H3/04,301 | EA | EA00 CONTROLLED DEVICES OF COMBUSTION AIR HEATER |
EA01 | EA02 | ||||||||
| . Open types | . Others | |||||||||||
| EB | EB00 CONTROLLED ELEMENTS |
EB01 | EB02 | EB03 | EB04 | |||||||
| . Convection air blasting means | . Combustion means | . Blasting and combustion means | . Others | |||||||||
| EC | EC00 CONTROLLED PARAMETERS |
EC01 | EC02 | EC03 | EC04 | |||||||
| . Temperature | . Time | . Temperature and time | . Others | |||||||||
| ED | ED00 SAFETY MEASURES |
ED01 | ED02 | ED03 | ED04 | |||||||
| . At abnormal temperatures | . At abnormal pressures | . Alarm and warning | . Others | |||||||||
| F24H3/04,302-3/04,304@Z | FA | FA00 CONTROLLED DEVICES FOR ELECTRIC AIR HEATER |
FA01 | FA02 | FA03 | FA04 | ||||||
| . Semiconductor air heaters | . Air heaters having different heating element | . Air-heating foot warmers | . Others | |||||||||
| FB | FB00 CONTROLED ELEMENTS |
FB01 | FB02 | FB03 | FB04 | FB05 | ||||||
| . Convection air blasting means | . Electric heating elements | . . Semiconductor air heaters | . Blasting means and electric heating elements | . Others | ||||||||
| FC | FC00 CONTROLLED PARAMETERS |
FC01 | FC02 | FC03 | FC04 | |||||||
| . Temperature | . Time | . Temperature and time | . Others | |||||||||
| FD | FD00 SAFETY MEASURES |
FD01 | FD02 | FD03 | FD04 | |||||||
| . At abnormal temperatures | . At abnormal pressures | . Alarms and warning sounds | . Others |