DRUM TYPE DRYING MACHINE

PURPOSE: To make it possible to de-energize a motor and heaters of a drum type drying machine by means of a door switch and to prolong the life of this door switch without allowing large current to the door switch. CONSTITUTION: The door switch 42 turns on and the DC voltage of a DC power source sec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	IKEDA HIROSHI, NISHIMURA NOBUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING DRYING DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR HEATING LAUNDERING LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILEARTICLES LIGHTING MECHANICAL ENGINEERING RELAYS SELECTORS TEXTILES TREATMENT OF TEXTILES OR THE LIKE WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE: To make it possible to de-energize a motor and heaters of a drum type drying machine by means of a door switch and to prolong the life of this door switch without allowing large current to the door switch. CONSTITUTION: The door switch 42 turns on and the DC voltage of a DC power source section 50 is impressed on a driving circuit 61 when a door is closed. Inverters 63 to 65 apply gate signals to triacs 47 to 49 when a driving signal is outputted from a microcomputer 60 in this state. The triacs 47 to 49, then, turn on and the motor 34 for driving the drum and the fan of a blasting device and the PTC heaters 31, 32 are energized. The door switch 42 turns off and the impression of the DC voltage on the driving circuit 61 stops when the door is opened. The inverters 63 to 65, then, stop outputting the gate signals and, therefore, the triacs 47 to 49 turn off and the motor and the PTC heaters are de-energized.