Permanent lod, and heating device for effectively transferring heat to the permanent lod

Abstract

The present invention is related to a heating device used in a rod for permanent wave, which controls capable of heating the rod electrically and effectively. In particularly, the present invention is related to a heating device with easy maintenance and safety and a rod for permanent wave with improved structure, which can overcome a problem of sensing a temperature of the heating device and a problem of inefficient electrical heating of the rod for permanent wave. An object of the present invention is to handle the problems by providing a rod for permanent wave having a relatively strong durability as well as an excellent thermal conductivity, and a heating device for electrically heating the rod for permanent wave with the most effective way.

1 . A heating device capable of heating a rod for permanent wave electrically and effectively comprising:
 a housing enclosed by a peripheral frame and opened upward;   an insulating plate installed on the bottom of the housing; a plate-type heater installed on the top side of the insulating plate to be heated via applied electric power, said heater being installed between protecting plates;   an electrical-heating plate electrically and directly heated from the heated plate-type heater;   numbers of heating rods fitted onto the electrical-heating plate to be directly heated from the plate-type heater, said heating rod being finished on a surface identical with the lower side of the electrical-heating plate; and   said heating rod being formed with numbers of heat-transferring holes on the outside of the same, air in the heat-transferring hole being heated by transferred heat, and the heated air being discharged from the hole to heat the inside of the rod for permanent wave inserted into the heating rod.   
   
   
       2 . The heating device as claimed in  claim 1 , wherein a temperature sensor is installed in the inside of at least one heating rod, installed on the middle part of the heating rod in length direction, and is operated via a set temperature of the heating rod to heat the electrical-heating plate and the heating rod or to stop heating of the electrical-heating plate and the heating rod. 
   
   
       3 . The heating device as claimed in  claim 1 , wherein said heating rod has 30 mm to 40 mm in length. 
   
   
       4 . A rod for permanent wave is inserted into numbers of heating rods to be electrically heated, said heating rod being fitted in an electrical-heating plate heated by a surface of a heated plate-type heater to be heated from the heated electrical-heating plate, wherein
 an electrical-heating tube is formed in the rod for permanent wave with integral in length direction, the inside of the electrical-heating tube is hollow and an electrical blade is extended along the outside of the electrical-heating tube.   
   
   
       5 . The rod for permanent wave as claimed in  claim 4 , wherein numbers of electrical-heating blades are formed symmetrically about a concentric of the electrical-heating tube. 
   
   
       6 . The rod for permanent wave as claimed in  claim 4 , wherein the upper end of the heating rod is flat and a surface slanted toward downward, the rod for permanent wave is inserted in the slanted surface, and an electrical button installed in the inside of the lower part of the rod is abutted against the slanted surface to perform electrical-heating.