JPS5950360B2 - electric iron - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sole plate for an iron.

Conventionally, as a method of making the surface temperature of the bottom plate of an iron uniform, thick castings of iron, aluminum, etc. have been used.

However, if the wall thickness is too large, the heat capacity becomes large, so that it takes time for the temperature distribution of the bottom plate to become uniform when the iron is started to be used, and the weight of the iron itself becomes large.

The present invention aims to eliminate the above-mentioned drawbacks, and is designed to quickly equalize the surface temperature of the bottom plate.

One embodiment will be described below with reference to the drawings. Reference numeral 1 denotes an iron body, and a handle 2 is attached to the upper part of the iron body.

3 is the power cord, and 4 is the bottom plate, which itself has a heat pipe structure.

That is, a hollow part is formed by the upper plate 5 and the lower plate 6, and the inside of this hollow part is deaerated and filled with an appropriate amount of working fluid, such as water.

The inner surface of the hollow portion of the bottom plate 4 is lined with a first capillary material 7, and the upper and lower capillary materials 7 are connected by a second capillary material 8 to form a plurality of vapor spaces 9.

A heater plate 10 is attached to the upper surface of the bottom plate 4, and a heater 11 is embedded therein.

12 is an operation switch. In the above configuration, when the operation switch 12 is operated to energize the heater 11, the heater plate 10 is heated and the heat is transferred to the upper plate 5 of the bottom plate 4.

This heat evaporates the water inside the first capillary material 7 on the inner surface of the upper plate 5.

This steam descends through the steam space 9 and condenses at the first capillary material 7 on the inner surface of the lower plate 6.

The water condensed in the first capillary material 7 on the inner surface of the lower plate 6 rises through the second capillary material 8 due to capillary action, returns to the first capillary material 7 on the inner surface of the upper plate 5, and evaporates again. evaporates into
This will lead to repeated condensation.

At this time, heat of condensation is generated by the condensation of the water, and the lower plate 6 is heated by this heat of condensation, making ironing possible.

At this time, since the heat capacity of the bottom plate 4 is reduced by the heat pipe structure (the hollow shape), the lower plate 6 of the bottom plate 4 immediately becomes hot.

Moreover, since the entire surface of the lower plate 6 is heated by the steam, it exhibits a uniform temperature distribution.

In addition, since the bottom plate itself has a heat pipe structure, the bottom plate 4
There is no need to embed a heat pipe body in the structure, and the configuration can be simplified.

On the other hand, in the above embodiment, the heater 11 and the heater plate 10
is installed on the outer surface of the upper plate 5, but it may be installed as shown in FIGS. 2 to 5.

That is, in the structure shown in Fig. 2, the upper plate 5 shown in Fig. 1 itself serves as a heater plate, and since there is no upper plate 5, the thermal resistance to the lower plate 6 is smaller than that of the structure shown in Fig. 1. This further improves the temperature rise characteristics.

Furthermore, in the one shown in FIG. 3, a heater 10 is provided inside the first capillary material 7 on the inner surface of the upper plate 5, and the temperature rise characteristics thereof are further improved.

In the case shown in FIG. 4, the upper plate 5 of the bottom plate 4 is formed into a corrugated plate shape, and the second capillary material 8 is provided on the inner surface of the corrugated recess so as to be in contact with the inner surface of the lower plate 6. It is provided on the outer surface of the recess for heat transfer.

In this case, there is no need to provide the first capillary material 7 as shown in FIG. 1 on the inner surfaces of the upper plate 5 and the lower plate 6, and there is an advantage that the structure can be simplified and the strength can be improved by the wavy irregularities.

In addition, the heater shown in FIG. 5 has the heater itself provided in the bottom plate covered with a capillary material 7', and the same effect as that shown in FIG. 4 can be expected.

For the first and second capillary materials 7 and 8 used in Figs. 1 to 5, stainless steel fibers, copper mesh, etc. can be used, but sintered alloys with a large number of pores are optimal in terms of strength. In particular, when used as the second capillary material 8, the bottom plate 4
Since it can have a pressure-resistant structure and can be applied to those with high vapor pressure, it is possible to further heat the outer surface of the lower plate 6.

As described above, in the present invention, the bottom plate has a heat pipe structure to reduce its heat capacity, and almost the entire area of the bottom plate is heated by the heat pipe structure, so that the temperature of the bottom plate can be uniformized quickly. It has great industrial value, as it does not require a special heat pipe.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an electric iron according to an embodiment of the present invention, and FIGS. 2 to 5 are sectional views of main parts of the same embodiment. 4... Bottom plate, 7... Capillary material, 10...
...Heater buried board, 11... Heater.

Claims (1)

[Scope of Claims] 1. An electric iron comprising a bottom plate formed into a hollow shape to serve as a heat pipe, and a heater disposed in at least the △ portion of the bottom plate. 2. The electric iron according to claim 1, wherein a part of the bottom plate is formed of a heater embedded plate. 3. The electric iron according to claim 1, wherein the heater is embedded in a capillary material provided in a hollow portion of the bottom plate.