Title:
DC HEATING CIRCUIT AND ELECTRIC SOLDERING IRON FORMED BY SAME
Document Type and Number:
WIPO Patent Application WO/2017/020564
Kind Code:
A1
Abstract:
A DC heating circuit comprises a triode, a diode, an inductor, a first capacitor, a second capacitor, and a heating wire. A source of the triode is grounded. A drain of the triode is connected to a positive electrode of the diode and one end of the inductor separately. A negative electrode of the diode is connected to a DC voltage. The negative electrode of the diode is further connected to the first capacitor, the second capacitor, and the heating wire that are connected in parallel. The other end of the first capacitor, the other end of the second capacitor, and the other end of the heating wire are connected to the other end of the inductor. A soldering iron head (1) of an electric soldering iron having the DC heating circuit is provided with a cavity, a ceramic tube (4) is disposed in the cavity, a heating element (2) is disposed on an outer wall of the ceramic tube, and a thermocouple (3) is disposed inside the ceramic tube. The DC heating circuit achieves DC heating of a heating component of the electric soldering iron. A thermocouple sensor has a high data acquisition speed, and temperature deviation caused by interference is avoided. During soldering of the soldering iron, the temperature fluctuation of the soldering iron head is low, thereby improving the soldering speed and the soldering quality.
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Inventors:
ZHENG YAO (CN)
GUO YAOBO (CN)
GUO YAOBO (CN)
Application Number:
PCT/CN2016/072455
Publication Date:
February 09, 2017
Filing Date:
January 28, 2016
Export Citation:
Assignee:
SHENZHEN SHANG JIN ELECTRONIC SCIENCE AND TECH CO LTD (CN)
International Classes:
B23K3/03
Foreign References:
| CN204122898U | 2015-01-28 | |||
| CN201009027Y | 2008-01-23 | |||
| CN2375404Y | 2000-04-26 | |||
| CN1947910A | 2007-04-18 | |||
| US20080179309A1 | 2008-07-31 | |||
| CN105033393A | 2015-11-11 | |||
| US20120312789A1 | 2012-12-13 | |||
| CN203156736U | 2013-08-28 | |||
| CN103399597A | 2013-11-20 |
Attorney, Agent or Firm:
BEIJING UTC LIANFENG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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