JPS608839B2 - steam iron - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a steam iron for general household use.

Structure of the conventional example and its problems Conventional steam irons communicate with the vaporization chamber through a drip nozzle installed at the bottom of the tank, and this drip nozzle is manually opened and closed to supply and stop water. It was common.

Therefore, if the operator misuses the steam, for example by adjusting the temperature of the base surface to be lower than the appropriate temperature at which steam can be generated, or if the base surface is not sufficiently heated, the steam may be supplied to the vaporization chamber. The water did not completely evaporate, causing water leaks. In addition, after use, if you open the drip nozzle with water left in the tank and leave it in a horizontal position, the water in the tank will flow into the vaporization chamber and the steam passage leading to the steam hole, corroding the base. There was also. To solve this drawback, as a way to sense the heat from the base and control the water supply to the vaporization chamber,
A device in which the drip nozzle was opened and closed by a bimetal installed inside the vaporization chamber was considered.

However, when this bimetal is constantly exposed to boiling water or steam and repeatedly dried, it becomes corroded and has limescale deposits, making it unreliable. Furthermore, even though the bimetal senses the heat of the base and opens the drip nozzle during use, the bimetal is cooled by the water supplied from the drip nozzle, causing the drip nozzle to become clogged. Another drawback was that a stable steam jet could not be obtained.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and provides a highly reliable steam iron that can emit stable steam and can be used for a long period of time, while preventing malfunctions caused by incorrect use or erroneous operation by workers. This is what we provide.

Structure of the Invention In order to achieve the above object, the present invention comprises a base, a vaporizing chamber provided on the base, a tank disposed above the base, a water passage connecting the tank and the vaporizing chamber, and a water passage connecting the tank and the vaporizing chamber. a first switching device that opens and closes using a passage and a thermally responsive member;
By providing a second opening/closing device that opens and closes manually, water in the tank is not supplied to the vaporization chamber until the vaporization chamber reaches a temperature at which it can completely vaporize water, and the water remains at the same temperature even after use. It is designed to close automatically when the following conditions occur.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a base in which a heater 2 is embedded;
A vaporization chamber 3 and a steam hole 4 are formed. 5 is a base lid that covers the vaporization chamber 3; 6 is a cover that covers the entire base 1 from above; 7 is a handle installed above the base 1;
A tank 8 is formed inside.

Reference numeral 9 denotes a bottom plate fixed to the lower surface of the handle 7 to define the tank 8, which has an opening □ 10 and a cylindrical projecting portion 1 projecting upward.
1 is formed, and a support hole 12 is formed on the upper surface of this protruding cylindrical portion 11.
is formed.

Reference numeral 13 denotes a water passage forming part fixed to the back surface of the bottom plate 9, which covers the bottom surface of the closing opening 10 and the protruding cylindrical part 11, and
A water passage 14 is formed between the bottom plate 9 and the bottom plate 9.

Reference numeral 15 denotes a recess formed at the rear outside of the vaporization chamber 3 of the base, and a thermally responsive member i6 such as a reversible bimetal that senses the base temperature and performs reversal operation is disposed within this recess 15.

17 is a lid that covers the recess 15, and in the center of this lid 17 is a pin 18 that moves up and down as the thermally responsive member 16 reverses.
A guide hole 19 is formed to slidably hold the.

Reference numeral 20 denotes a first opening/closing device having a valve shaft 21a integrally provided with an on-off valve 21 for opening and closing the closing opening 10 on the upper part thereof, and closing the opening row 0 and the water passage forming member 13 located below the opening row 0. The on-off valve 2
1 is biased downward to close the closure 10. 2
4 is a flexible packing that covers the lower surface of the opening 22 of the water passage forming member 13.

The first opening/closing device 20 moves up and down via the pin 18 in response to the up and down movement of the thermally responsive member 16 due to the reversal action, and opens and closes the closure 10 . Reference numeral 25 denotes a drip nozzle provided on the water passage forming member 13 facing the lower surface of the protruding cylindrical portion 11 .

A closing opening 26 is formed in the base lid 5 located below the dripping nozzle 25, and the water dripped from the dripping nozzle 25 is
The gas is supplied into the vaporization chamber 3 through this closed opening 26. Reference numeral 27 denotes a second opening/closing device having an opening/closing punch 27a that moves up and down inside the protruding cylinder 11 and opens and closes the opening of the dripping nozzle 25 at its lower end. is open, but operation button 2 at the top
8 is manually pressed downward, the opening/closing cap 27a descends and closes the opening of the dripping nozzle 25.

29 is a packing that connects the drip nozzle 25 and the closing opening 26 of the base lid 5.

In the above configuration, when ironing is performed using steam, the pressure on the operation button 28 is released, the opening/closing bar 27a is raised, and the opening □ of the dripping nozzle 25 is opened.

When the temperature of the base is lower than the appropriate steam temperature, such as when the heater 2 is initially energized, the thermally responsive member 16 is in the state shown in FIG. 1, and the opening/closing valve 21 closes the opening 10. Therefore, water does not flow into the water passage 14 and is not supplied into the vaporization chamber 3 even if the drip nozzle 25 is opened. When the base is heated by the heater 2 and reaches the appropriate temperature for vaporizing water, the thermally responsive member 16 is reversed as shown in FIG. 2 and raises the valve stem 21a via the pin 18. The first opening/closing device 20 opens the closure 10 . In this state, the water in the tank 8 is supplied to the vaporization chamber 3 from the drip nozzle 25 through the water passage 14, and the steam generated in the vaporization chamber 3 is discharged from the steam hole 4. Of course, even during use, it is possible to stop the supply of water to the vaporization chamber 3 by pressing down the operation button 28 and blocking the dripping nozzle 25 with the second opening/closing device 27. The switching can be performed arbitrarily by manual operation. In addition, by making the opening row 0 on the tank 8 side provided in the water passage 14 larger than the dripping nozzle 25, which is the closing port on the vaporizing chamber 3 side, the water in the tank 8 can be quickly guided to the dripping nozzle 25. It is possible to generate steam immediately after the operation of the thermally responsive member 16. Effect of the Invention 0 As described above, according to the present invention, when the base temperature is lower than the temperature at which water can be vaporized, the water passage connecting the tank and the vaporization chamber is closed by the first opening/closing device. Water inside the steam iron is not supplied to the vaporization chamber, thereby preventing water leakage and corrosion of the base due to misuse, etc., and providing a steam iron that is highly reliable over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part of a steam iron showing an embodiment of the present invention, Fig. 2 is a sectional view of the main part when steam is generated, Fig. 3 is a perspective view of the main part, and Fig. 4 is a sectional view of the main part when steam is generated. It is a top view of the base of the steam iron with the base lid removed. 1...base, 3...vaporization chamber, 8...tank, 10...
...Closed, 14...Water passage, 16...
Thermal response member, 20...First switching device, 25.
... Nozzle (open □), 27... Second opening/closing device. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A base, a vaporization chamber provided on the base, a tank disposed above the base, a water passage connecting the tank and the vaporization chamber, and an opening communicating from the tank to the water passage. a first opening/closing device that opens and closes by a thermally responsive member operated by the heat of the base, and a second opening/closing device that opens and closes by manual operation an opening leading from the water passage to the vaporizing chamber. 2. Claim 1 in which the opening leading from the tank to the water passage is larger than the opening leading from the water passage to the vaporization chamber.
Steam iron as described in section. 3. The steam iron according to claim 1, wherein the first opening/closing device and the second opening/closing device are arranged horizontally shifted from each other.