(19)
(11) EP 4 057 775 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.12.2022 Bulletin 2022/50

(43) Date of publication A2:
14.09.2022 Bulletin 2022/37

(21) Application number: 22161471.2

(22) Date of filing: 10.03.2022
(51) International Patent Classification (IPC): 
H05B 3/48(2006.01)
F24H 1/10(2022.01)
 H05B 1/02(2006.01)
F24H 9/20(2022.01)
(52) Cooperative Patent Classification (CPC):
H05B 1/0244; H05B 3/48; F24H 1/103; F24H 9/2028
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 10.03.2021 US 202117197542

(71) Applicant: Watlow Electric Manufacturing Company
St. Louis, MO 63146 (US)

(72) Inventors:
  • EVERLY, Mark
    St. Charles MO 63301 (US)
  • SMITH, Trevor
    O'Fallon, MO 63366 (US)
  • SPOOLER, Jacob
    Maryland Heights, MO 63043 (US)

(74) Representative: Germain Maureau 
12, rue Boileau
69006 Lyon
69006 Lyon (FR)

   


(54) HEATER BUNDLES WITH LOCAL POWER SWITCHING


(57) A heater system (10) includes a heater bundle. The heater bundle includes at least one heater assembly, where the heater assembly includes a plurality of heater units (52), and more than one of the heater units (52) defines at least one independently controlled heating zone. The heater bundle includes a plurality of power conductors (56) electrically connected to the independently controlled heating zone. The heater system (10) includes means for determining temperature and at least one power switch (120), the power switch (120) disposed proximate the heater bundle. The heater system (10) includes at least one controller (15) configured to modulate power to the independently controlled heating zones (62) through the power conductors (56) based on the determined temperature to provide a desired power output along a length of the heater assembly. The controller is configured to provide power to the power switch (120).







Search report


















Search report