JPS60232200A - Electric iron - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric iron, and more particularly to a foot member of an electric iron for ironing at home and during travel.

The foot members of prior art irons are made of aluminum or other metal alloys with good thermal conductivity and have a substantial effect when operating the electric iron to generate heat, especially when ironing objects such as textiles. conduct.

Generally, the eyelid member is heated by supplying power to a resistor heater. These have metal resistive elements or tubular heaters that are press-fit into grooves in the foot members in a ceramic insulating material, where the metal resistive elements are provided and these heaters are cast directly into the grooves in the foot members. . What substantially affects the use of an iron is the temperature of the surface of the foot member that presses the object to be ironed. This temperature is set by a temperature controller or, more rarely, by a temperature-sensitive switch and electronic controller.

The disadvantages of irons having conventional foot members are that they have a low wattage efficiency and an unsatisfactory precision in the temperature control operation of the foot surface. Also, the heat flow generated in the foot member is substantially dependent on the duration of the particular phase of the operating cycle of the resistive heater, and this heater has an almost linear, so-called hard thermal characteristic. Therefore, it is difficult to coordinate the heat flow at the surface of the foot member to match the heat flow received by the object being ironed, and this also necessitates the use of high-quality automatic thermostats. There wasn't. Further, conventional irons have unsatisfactory durability and reliability during use due to the characteristics of the material used as the resistive heating element.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned disadvantages by designing an iron such that the heat flow on the surface of the foot member is well matched to the heat flow received by the object to be ironed. . This seeks to improve the quality and durability and reliability of ironing over irons having electric heating elements and resistive heaters.

The above objective can be achieved in principle by the following configuration. That is, in an electric iron having a foot member whose surface that comes into contact with the object to be ironed is flat,
A plurality of cylindrical convex or concave sections or flat section regions are formed on the surface opposite to the flat section of the foot member and are in direct contact with the non-conductive surface of each semiconductor heating element. The surface opposite the conductive surface and not in contact with each section is most preferably coated with a thin semiconducting metal oxide coating disposed around the periphery of the foot member, in which electrical energy is converted to thermal energy. approximately 0.1 from the surface covered by the thin film.
A reflective element formed of a plurality of roll-shaped parts or flat parts whose surface on the thin film side is a glossy surface is provided from the metal sort at a distance of ~0.9 mm, and is attached to the foot member above the reflective element. The reflective element is configured to be tightened and fixed to the foot member by providing a partition wall member. The installation positions of the reflective element and the partition member relative to the semiconductor heating element are fixed by a ceramic body having an electrode installation pedestal and a feeder hole, and an air chamber is provided between the reflective element and the partition member. Preferably, the surface portion of the foot member excluding each segmented area excluding the convex surface portion, concave surface portion, or flat surface portion and the portion where the temperature regulator comes into direct contact with the foot member are covered with a highly heat-resistant material such as polytetrafluoroethylene. be done. Then, the protrusions made of the foot member material provided at both ends of each convex surface part, the iron hooks are connected to each semiconductor by means of a flat resistance area provided on a plane parallel to the plane and electrodes installed on the pedestal of the ceramic body. The installation position of the element is prevented from changing. Note that in the case of a device having a plurality of convex surface portions and a plurality of flat surface portions, the above-mentioned protrusion is unnecessary.

An advantage of the invention is that the power efficiency of the iron is increased by better matching the heat flow in the foot surface to the heat flow received by the object being ironed to provide surface heating. Ironing also improves the quality of objects, especially textiles. Furthermore, in the use of an iron having an electric element and a resistive heater in the foot member of the electric iron, taking advantage of the physical and chemical properties of a semiconductor heating element consisting of a thin coating and a base to which it is attached, The purpose is to increase its durability and reliability.

Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

In the Kanrutokoi drawing, the surface of the foot member of the electric iron that comes into contact with the object to be ironed is flat, and the surface opposite to the flat surface has a plurality of convex portions 2 forming cylindrical surface portions. have These convex portions 12 are in direct contact with the non-conductive surfaces of the semiconductor heating elements 3, and the opposite surfaces of these semiconductor heating elements that do not come into contact with the convex portions are coated with a thin semiconductor metal oxide coating. . The semiconductor heating element 3 is made of industrial glass containing 5if2 with a content of more than 80%, and the thin semiconductor metal oxide coating consists of 5nO7 and Sb. The thickness of this oxide coating is 4 μm. In the coating, electrical energy is converted into thermal energy to generate surface heat. Preferably, each convex portion is arranged on the periphery 4 of the foot member.

A reflective element 5 formed of a roll-shaped part from a metal sheet is provided at a position approximately 2.5 mm apart from the thin coating, and a thin coating is provided on the surface of the reflective element 5, and the surface on the thin coating side is glossy. A partition member 6 is provided on the reflective element and attached to the foot member via a screw fixed in a hole 7. This reflective element 5 is fixed to the foot member through a curved member 17 made of the material provided on the partition member 6. The positions of the reflective element and the partition member relative to the semiconductor heating element are fixed via the ceramic body 8. This ceramic body 8 has a pedestal 9 that functions as an electrode installation and a hole IO for a power supply line. An air chamber 11 is provided between the reflective element 5 and the partition member 6.
is provided. The surface of the foot member excluding each convex surface portion and the predetermined portion I3 of the temperature regulator that comes into direct contact with the foot member.
is coated with polytetrafluoroethylene. Each semiconductor heating element 3 is located at its installation position via a protrusion 14 at both ends of each convex portion of the foot member, a flat resistance region 15 on a plane parallel to the iron plane, and an electrode located on a pedestal 9 of the ceramic body 8. fluctuations are prevented. Each hole 16 serves to secure the housing and gripping pad to the iron during assembly. The current in the iron flows in two parallel branches consisting of a series connection of seven semiconductor heating elements and a series connection of eight semiconductor heating elements.

[Brief explanation of drawings]

Fig. 1 is a plan view of an iron according to an embodiment of the present invention seen from the side opposite to the contact surface with the object to be ironed before assembly, and Fig. 2 is a cross section of each convex surface portion of the iron after assembly. Figure 3 is a vertical cross-sectional view of the ceramic body before assembly, Figure 4 is a cross-sectional view taken along the line A-A at the hole portion of the ceramic body shown in Figure 3 where the power supply line is fixed, and Figure 5 is the view shown in Figure 3. FIG. 3 is a cross-sectional view taken along the line B-B of the pedestal portion on which the electrode of the ceramic body is installed. Door iron hook is contact surface, 2... convex or concave surface part, 3
... Semiconductor heating element, 5. Reflective element, 6. Partition wall member, 7. Screw hole, end... Ceramic body, 9. Pedestal, IO/feeder hole, IT/air chamber, 12 - Surface of foot member, 14...Protrusion, 15...Flat resistance area, 16
... Hole, 17... Curved member.

Claims (7)

[Claims] (1) In an electric iron having a foot member whose surface that comes into contact with the object to be ironed is flat, the surface of the foot member opposite to the flat surface is in direct contact with the non-conductive surface of each semiconductor heating element. A plurality of divided regions are formed, and a surface opposite to the non-conductive surface that does not come into contact with each divided region is covered with a thin film semiconductor heating element, and the surface is spaced approximately 01 to 069 mm from the surface covered with the thin film. An electric iron characterized in that a reflective element made of a metal sheet whose surface on the thin film side is a glossy surface is provided at the position, and a partition member is provided above the reflective element. (2) The electric iron according to claim 1, wherein the divided region is a cylindrical convex or concave surface, or a flat surface. (3) The electric iron according to claim 1 or 2, wherein each segmented area is arranged around the leg member. (4) The electric iron according to any one of claims 1 to 3, wherein the reflective element forms a plurality of rolled portions or flat portions. (5) Claims 1 to 5, in which the semiconductor heating element is manufactured from industrial glass or ceramic material.
The electric iron according to any of clause 4. (6) A patent in which the installation position of the reflective element and the partition member relative to the semiconductor heating element is fixed by a ceramic body having an electrode installation pedestal and a hole for the power supply line, and an air chamber is provided between the reflective element and the partition member. An electric iron according to any one of claims 1 to 5. (7) The surface portion of the foot member excluding each segmented area and the portion where the temperature regulator comes into direct contact with the foot member are covered with a highly heat-resistant material, while the foot member provided at both ends of each convex surface portion Claims: The protrusion made of the material, the ironing part, prevents the installation position of each semiconductor element from changing by means of a flat resistance area provided on a plane parallel to the plane and an electrode installed on the base of the ceramic body. The electric iron according to any one of items 2 to 6.