JPS6358599B2 - - Google Patents

Description

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

Conventional structure and its problems Conventionally, it has been considered that the drip nozzle that controls the supply of water from the tank to the vaporization chamber is opened and closed by a bimetal that is installed in the vaporization chamber and responds to the temperature of the base. Ta.

However, this bimetal was constantly exposed to boiling water or steam, and as a result of repeated drying, corrosion progressed and limescale etc. adhered to it, making it unreliable. The water in the vaporization chamber is controlled from the top and bottom of the dripping nozzle.
The above drawbacks cannot be avoided, and
The hole of the drip nozzle is very small (generally 0.5
~0.6mm), there was also the problem that water dripping became unstable if there was an obstacle on the exit side.

OBJECTS OF THE INVENTION The present invention provides a steam iron with an improved structure that solves the above-mentioned conventional drawbacks.

Structure of the Invention In order to achieve the above object, the present invention includes a base heated by a heater, a vaporization chamber provided on the base, a tank disposed above the base, and a water passage leading from the tank to the vaporization chamber. a dripping nozzle provided in the water passage to supply a specified amount of water to the vaporization chamber; and a dripping nozzle located a certain distance upstream of the dripping nozzle.
The device is equipped with a thermally responsive switching device that opens and closes the water passage in response to the temperature of the base. Therefore,
The heat-responsive switchgear operates accurately without being affected by steam in the vaporization chamber.

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, and a vaporizing chamber 3 and a steam hole 4 are formed therein. 5 is a base lid that covers the vaporization chamber 3;
A cover 6 covers the entire base 1 from above.
Reference numeral 7 denotes a handle installed above the base 1, and 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. The bottom plate 9 is formed with an opening 10 and a cylindrical protruding portion 11 that protrudes upward.
is formed. 13 is a water passage forming member fixed to the back surface of the bottom plate 9, which covers the lower surface of the opening 10 and the protruding cylinder part 11, and forms a water passage 14 which is attached to the bottom plate 9 and extends in the horizontal direction; Space 1 provided between tank 8 and cover 6
It is located at 4a. Reference numeral 15 denotes a recess formed in the rear portion of the base 1 outside the vaporization chamber 3, and a thermally responsive member 16 such as a reversible bimetal that senses the base temperature and performs reversal operation is disposed within the recess 15.

17 is a lid that covers the recess 15, and in the center of this lid 17 is a guide hole 1 that slidably holds a pin 18 that moves up and down as the thermally responsive member 16 reverses.
9 is formed. Reference numeral 20 denotes a thermally responsive opening/closing device having a valve shaft 20a integrally provided with an on-off valve 21 for opening and closing the opening 10 at the upper part thereof, and the opening 10 and a water passage forming member 13 located below the opening 10.
The on-off valve 21 passes through the opening 22 of the opening 10 and is biased downward by a spring 23 so as to close the opening 10 . 24 is flexible packing that covers the lower surface of the opening 22 of the water passage forming member 13. The thermally responsive switching device 20 connects the thermally responsive member 16 via the pin 18.
The opening 10 opens and closes by moving up and down in response to the up and down movement caused by the reversing operation. Reference numeral 25 denotes a drip nozzle that is provided on the vaporization chamber 3 side of the water passage 14, that is, on the downstream side of the opening 10, facing the lower surface of the protruding cylindrical portion 11. An 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 supplied into the vaporization chamber 3 through this opening 26. Reference numeral 27 denotes a manual opening/closing device that moves up and down inside the protruding cylinder 11 and has an opening/closing rod 27a that opens and closes the opening of the drip nozzle 25 and the tank 8 at its lower end, and is different from the thermally responsive opening/closing device 20 in the horizontal direction. The opening of the drip nozzle 25 is always biased upward to open the opening of the drip nozzle 25. However, when the operation button 28 at the upper end is manually pressed downward, the opening/closing rod 27a is lowered and the drip nozzle 2 is opened.
Close the opening No. 5 from above. 29 is a packing that connects the drip nozzle 25 and the 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 rod 27a is raised, and the dripping nozzle 25
Open the opening. When the temperature of the base 1 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 on-off 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.

Then, the base 1 is heated by the heater 2,
Once the proper temperature is reached to vaporize the water, the thermally responsive member 16 is inverted as shown in FIG.
8, the valve shaft 20a is raised, and the opening 10 is opened by the thermally responsive opening/closing device 20. In this state, the water in the tank 8 passes through the water passage 14 and is supplied to the vaporization chamber 3 from the drip nozzle 25, and the steam generated in the vaporization chamber 3 is discharged from the steam hole 4. Of course, even when in use, the operation button 28
It is possible to stop the supply of water to the vaporization chamber 3 by pressing down and closing the dripping nozzle 25 with the manual opening/closing device 27, and switching between steam and dry can be arbitrarily performed by manual operation. I can do it.

In addition, the manual opening/closing device 27 allows the drip nozzle 25 to
Even if the opening 10 is opened, when the temperature of the base 1 falls below a predetermined value, the thermally responsive opening/closing device 20 closes the opening 10. At this time, the remaining water existing in the water passage 14 is removed from the dripping nozzle 25 because the hole in the dripping nozzle 25 is extremely small.
No leakage from 5 (because there is no air displacement). Furthermore, even after the manual opening/closing device 27 is opened again,
A prescribed amount of the remaining water is supplied to the vaporization chamber 3 through the drip nozzle 25.

Note that if the water passage 14 is formed by fixing the water passage forming member 13 to the bottom of the tank 8 as in the embodiment, the drip nozzle 25 as well as the water passage 14 will be integrated into the tank 8, and the configuration can be simplified. It can be effectively placed in a space 14a provided below the tank 8 for preventing tank overheating.

Effects of the Invention As described above, the steam iron of the present invention includes a dripping nozzle in the water passage connecting the tank and the vaporization chamber,
Since the thermally responsive opening/closing device is provided upstream of this, the thermally responsive member is cooled by the water supplied from the dripping nozzle during use, and does not inadvertently operate in the direction of closing the water passage. In addition, obstacles on the outlet side can be removed, and water can be dripped directly onto the surface of the vaporization chamber, so water drips stably and good steam can be spouted out continuously. In addition, even after the thermally responsive switchgear is closed, there is no dripping of water remaining in the water passage, which reliably prevents water from getting wet on clothing, and when the thermally responsive switchgear is opened again, water remains in the water passageway. Water is supplied to the vaporization chamber in a defined amount through the dripping nozzle, thereby making it possible to generate steam precisely.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a steam iron showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part when steam is generated, and FIG. 3 is an exploded perspective view of the main part.
FIG. 4 is a top view of the base of the same steam iron with the base lid removed. 1...base, 3...vaporization chamber, 8...tank,
14...Water passage, 20...Thermal response switchgear, 2
7...Manual opening/closing device.

Claims (1)

[Claims] 1. A base heated by a heater, a vaporization chamber provided on this base, a tank placed above this base, and a water passage leading from this tank to the vaporization chamber,
A dripping nozzle installed in this water passageway to supply a specified amount of water to the vaporization chamber, and a thermally responsive opening/closing device located a certain distance upstream of this dripping nozzle, which opens and closes the water passageway in response to the temperature of the base. Steam iron with.