JPS59189899A - Steam 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 a steam iron in which the water supply is stopped unless the base temperature has decreased to a value suitable for vaporizing the water.

1. Construction of a conventional example and its problems A conventional steam iron of this type will be explained with reference to FIG. In the figure, a base 1 made of a non-magnetic material such as an aluminum alloy in which a heater 1' is embedded has a vaporization chamber 3 and a steam ejection hole 4 which are communicated through a steam passage 2. The vaporization chamber 3 is provided in an annular shape around the projection 6. 6
7 is a base lid, 7 is a water tank, and 8 is a nozzle body located and fixed under the water tank, facing the vaporizing chamber 3, communicating with the inside of the water tank 7, and having a downward-sloping chi 7 shape. A nozzle hole 9 is provided.

The twisted nozzle body is made of a heat-sensitive material with a Curie point, such as 8id ferrite or an alloy of nickel and copper, or nickel and iron. Let it be done. 10 is a check-shaped valve body that opens and closes the nozzle hole 9;
It is made of permanent magnet J.

11 is a shaft of the valve body 1Q, 12 is a cylindrical portion provided above with a button 14 protruding from the locking part 13, and fitted with a large-diameter portion 15 formed at the upper end of the shaft 11 so as to be vertically movable below. The opening/closing rod 17 provided with 16 is a spring that biases the valve body 10 in the opening direction, and 18 is a watertight guide body for guiding the water in the water tank 7 to the nozzle hole 9 without leaking.

With the above configuration, FIG. 1 shows a state in which the valve body 1° is operable, and this state indicates that the nozzle hole is in a closed state with the valve body 1o. . Therefore, the temperature of the vaporization chamber 3, in other words, the temperature of the base 1 is lower than the Curie point of the nozzle body 8 made of a heat-sensitive material, and the nozzle body 8 and the valve body 10 are subjected to a force stronger than the spring 17 due to the magnetic attraction force. It turns out that there is. When the temperature of the base 1 rises, that is, the cue point of the nozzle body 8 is exceeded and the magnetism of the nozzle body 8 disappears, the valve body 10 is pushed down by the force of the spring 170, the nozzle hole 9 becomes open, and the water tank 7 The water inside is supplied to the vaporization chamber 3, and the steam generated here is ejected from the steam outlet 4 via the steam passage 2.

In this way, unless the temperature of the base 1 reaches a value suitable for vaporizing water, the water supply is automatically stopped, and the blowing of hot water that does not completely vaporize from the steam outlet 4, Or to prevent water leakage.

However, in the case of this conventional example, the nozzle hole 9 is located directly above the vaporization chamber 3.
The nozzle body 8 and the valve body 1Q are disposed here, and this position, that is, directly above the vaporization chamber 3, is where water stains are most likely to occur. That is, since the water supplied from the nozzle hole 9 is vaporized the moment it drops into the vaporization chamber 3, impurities (water scale) contained in the water are likely to be precipitated, and the water scale id nozzle body 8 or It adheres to the valve body 10. Furthermore, when water is supplied, the nozzle hole 9 is in an open state,
Since there is a gap between the nozzle body 8 and the valve body 10, water scale also adheres to the close contact portions of this valve structure, that is, the tapered lower surface of the nozzle body 8 and the tapered upper surface of the valve body 10. Therefore, the reliability of valve opening and closing is lacking for long-term use.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems and provides a steam iron having a valve device that is highly reliable for long-term use.

Structure of the Invention The steam iron of the present invention includes a base, a vaporization chamber provided in the base, a water tank that supplies water to the vaporization chamber, and a valve device that controls water supply from the water tank to the vaporization chamber. are doing. The valve device is provided with a valve seat on the water tank side, and a valve element that opens and closes the valve seat is connected to a permanent magnet below the valve seat, and a predetermined Curie point is attached below the permanent magnet. An annular body made of a heat-sensitive material is disposed. This annular body is arranged so that it can easily sense the base temperature, that is, it has good heat conduction. Furthermore, in order to ensure the movement of the permanent magnet, a spring is provided to bias the permanent magnet upward, that is, in the direction of opening the valve body.

With the above configuration, the valve seat and valve body of the valve device are thermally separated from the vaporization chamber, and can be protected from water stains.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the attached FIGS. 2 to 4.

A base 21 made of a non-magnetic material such as an aluminum alloy in which a heater 21' is embedded has a vaporization chamber 23 and a steam ejection hole 24 which are communicated through a steam passage 22. 25 is a rubber bushing that connects the needle valve and the valve device in a watertight manner, 26 is a vaporization chamber lid, and 27 is a water tank that can be attached to and detached from the iron body. 28 is a nozzle provided at the bottom of the water tank 27, 29 is a nozzle hole, and 30 is a valve stem. 31 is a shaft connecting this valve stem 30 and button 32. The above-mentioned members 28 to 32 constitute a needle type valve.

Next, 33 is a valve device, and 34 is a predetermined key.
,, an annular body made of a heat-sensitive material having a new repoint, 35 a permanent magnet, 36 a valve body, 37il-1 a spring biasing the permanent magnet upward, and 38 a valve seat. The valve seat 38 is arranged on the water tank 27 side,
A valve body 36 that opens and closes the valve seat 38 is connected to a permanent magnet 35 below the valve seat 38, and an annular body 34 is disposed below the permanent magnet 35. Further, 39 is a guide pin for ensuring the vertical movement of the cylindrical body and the 40id permanent magnet 35, and the central hole 34' of the annular body 34 functions as a guide.

Next, the operation will be explained.

First, open the needle valve as shown in Figure 3.

In other words, it is in a state where steam is emitted. At this time, water passes through the nozzle hole 29 (arrow a), but since the valve device 33 is closed, the water comes to the b-hole in the rubber pusher 25 and accumulates. In short, in the pulping device 33, the temperature of the base 21 is still low, and the magnetic attraction force between the permanent magnet 35 and the annular body 34 is lower than the Curie point of the annular body 34, which overcomes the spring 37 and closes the valve seat 38 with the valve body 36. It is in a state of development.

Next, when the temperature of the base 21 rises and exceeds the Curie point of the annular body 34, the magnetic attractive force between the annular body 34 and the permanent magnet 36 weakens, and the force of the spring 37 pushes up the permanent magnet 35, causing the valve body 36 to also rise. At the same time, the pulp device 33 is pushed up and turned into an open state (FIG. 4). The water accumulated in b in the rubber bushing 25 is supplied to the vaporization chamber 23 as indicated by the arrow □a', and as already mentioned, is turned into steam and discharged to the outside.

And if the base temperature drops due to vaporization,
As mentioned above, the valve device 3m is closed and water accumulates at point b within the rubber bushing 25, so that hot water that has not been completely vaporized in the vaporization chamber does not blow out. Also, even if you open the needle valve (push button 32 for steam), turn off the power, or lower the temperature setting and use it as is, the pulp equipment will still work as described above. 33 is closed, so there is no need to worry about water leakage.

In the embodiment of the present invention, the annular body 34 is attached to the base 2.
Furthermore, in the embodiment of the present invention, the valve opening/closing part is not located directly above the vaporization chamber as in the conventional example, but as described above. , is located on the side of the water tank 27 to protect it from water stains, and is highly reliable even during long-term use.

Next, a second embodiment of the present invention is shown in FIG.

Reference numeral 37' denotes a spring for applying a force to push the permanent magnet 35 upward, and a spring stopper 41 integrated with the valve body 36 receives this force.

Reference numeral 39' denotes a cylindrical ferromagnetic body formed by closely adhering to the annular body 34Yc, which reduces the gap distance between the annular body 34 and the permanent magnet 35, reduces magnetic resistance, and forms a strong magnetic circuit. In this way, consideration is given to increasing the magnetic attraction between the annular body 34 and the permanent magnet 35.

Therefore, it is possible to obtain a sufficient magnetic attraction force even with a low-performing, that is, inexpensive, permanent magnet, and it is possible to provide a highly reliable permanent magnet.

- In both of the above-described two embodiments, the water tank 27
Although an explanation has been given of a steam iron that can be attached and detached from the iron main body, it is needless to say that a steam iron having a configuration like the conventional example shown in FIG. 1 may also be used. In that case, the configuration will be as shown in FIG. 6, excluding the needle type valve. That is, the valve stem 3 is integrated with the valve body 36.
1 is provided, and this valve stem 31 is connected to the configuration of the large diameter portion 15, cylindrical portion 16, and spring 17 shown in FIG.

Effects of the Invention As has been explained so far, the steam iron of the present invention is capable of stopping water supply as long as the base temperature does not reach a predetermined temperature, and the position of the valve opening/closing part is considered to prevent water buildup. This protects the valve opening/closing part from damage, and has the excellent effect of ensuring high reliability in valve opening/closing even after long-term use.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view showing a conventional steam iron, Fig. 2 is a sectional view of main parts of a steam iron showing an embodiment of the present invention, and Figs. 3 and 4 show the operation of the main parts. 1 and 5 are enlarged sectional views of essential parts showing another embodiment of the present invention, and FIG. 6 is an enlarged sectional view of a valve portion of a steam iron showing still another embodiment. 33... Pulp device, 34... Annular body, 36... Permanent magnet, 36... Valve body,
3'7. 37'・・・Spring, 38...
···valve seat. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4 Figure 2 Figure 3 Figure 4 Figure 6

Claims (2)

[Claims] (1) The valve device includes a base, a vaporization chamber provided in the base, a water tank that supplies water to the vaporization chamber, and a valve device that controls water supply from the water tank to the vaporization chamber, and the valve device includes: A valve seat is disposed on the water tank side, and a valve element for opening and closing the valve seat is connected to a permanent magnet below the valve seat, and below the permanent magnet is made of a heat-sensitive material having a predetermined Curie point. A steam iron in which an annular body is arranged to sense base temperature, and the valve seat is opened and closed under the force relationship between the magnetic force acting between the permanent magnet and the annular body and a spring. (2) The steam iron according to claim 1, wherein the valve device is provided with a ferromagnetic material in close contact with the annular body.