JPS59214499A - 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 supply of water is stopped until the base temperature reaches a value suitable for vaporizing water.

Structure of conventional examples and their problems In recent years, most household irons have been steam irons with a steam generation method.
More than half of the irons are cassette-type steam irons with a steam tank that is removable from the main body.

The steam generation method of current steam irons uses a so-called drip type, in which the vaporization chamber and the steam passage are directly connected and the steam generated in the vaporization chamber is guided directly to the steam outlet on the base surface. If water is supplied to a vaporization chamber that has not risen, all of the water will not vaporize and hot water will spout from the steam outlet, and water will remain in the vaporization chamber after use, causing corrosion to the vaporization chamber and base. Something happened. In order to solve these problems, a steam iron as shown in FIG. 1 has been developed.

In FIG. 1, heater 1! In base 1, where is buried,
A vaporization chamber 3 and a steam ejection hole 4 are formed and communicated through a steam passage 2. The vaporization chamber 3 is provided in an annular shape around the protrusion 6. 6 is a base lid, 7 is a tank, and 8 is a nozzle body fixed at a position below the tank 7 facing the vaporizing chamber 3, communicating with the inside of the tank 7, and having a tapered shape that widens downward. A nozzle hole 9 is bored.

The nozzle body 8 is made of a heat-sensitive material such as ferrite, Ni-Cu alloy, Ni-Fe alloy, etc., with one Curie point set at a predetermined temperature, and its lower end is in contact with the upper end of the peripheral wall 3' of the vaporization chamber 3. This allows heat to be transferred from the base 1. 1o is a tapered valve body that opens and closes the nozzle hole 9, and is made of a permanent magnet.

Reference numeral 11 denotes a shaft of the valve body 10, 12 a steam button 14 that protrudes from the handle portion 13, and a cylindrical shape provided below, into which a large diameter portion 16 formed at the upper end of the shaft 11 fits vertically. 17 is a spring that biases the valve body 10 in the opening direction, and 18 is a rubber backing for guiding water in the tank T to the nozzle hole 9 without leaking to the outside.

In the above configuration, Figure 1 shows the steam button 1.
4 is pressed down, and the valve body 10 is in a state where it can be operated. Since the temperature of the base 1 is low, the valve body 1o keeps the nozzle hole 9 in a closed state. This is because the temperature of the vaporization chamber 3, that is, the temperature of the base 1, is lower than the temperature of the nozzle body 8, which is made of heat-sensitive material, and the nozzle body 8 and the valve body 10 have a force stronger than the elastic force of the spring 17. It has magnetic attraction. In this state, when the temperature of the base 1 rises and the temperature of the nozzle body 8 exceeds a single point, the nozzle body 8 does not lose its magnetism, and the elastic force of the spring 17 pushes down the valve body 10 and the nozzle hole 9 is in an open state. become. When the nozzle hole 9 is opened, the water in the tank 7 is supplied to the vaporization chamber 3, and the steam generated here is ejected from the steam ejection hole 4 via the steam passage 2.

In this way, the supply of water is automatically stopped unless the temperature of the base 1 reaches a value suitable for vaporizing water, and the boiling water that has not completely vaporized is ejected from the steam outlet 4 into the vaporizing chamber 3.
This prevents water from remaining on the surface.

However, with the above configuration, the nozzle body 8 needs to receive heat from the base 1, and therefore cannot be separated from the base 1, making it difficult to apply it to the currently mainstream cassette type steam iron.

In addition, since the nozzle body 8 must be directly heated,
Water scales tend to adhere here, and the valve mechanism lacks operational reliability during long-term use.

Furthermore, since the valve body 1o made of a permanent magnet is movable and comes into contact with the nozzle body 8 made of a heat-sensitive material, the valve body 10 vibrates due to external impact and collides with the nozzle body 8. There was a risk that permanent magnets or heat-sensitive materials, which are fragile in terms of material strength, would crack or break.

OBJECT OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and makes it possible to control the temperature of water dripping from the tank to the vaporizing chamber without changing the basic configuration of the current cassette steam iron. Moreover, the present invention provides a steam iron which has excellent operational reliability and durability of the operating groove of the valve mechanism during long-term use.

Structure of the Invention The steam iron of the present invention is provided with a nozzle body equipped with a normally closed valve at the bottom of a tank that is detachable from a base, and is made of a heat-sensitive material that is thermally connected and fixed to the base and whose temperature is set at a predetermined temperature. and a heat-sensitive material and a corresponding permanent magnet,
When the base temperature rises and the heat-sensitive material reaches a very high temperature, the magnetic force of the permanent magnet attracts the normally closed valve and opens the nozzle body. Since only magnetic force is involved, it is easy to attach and detach the tank from the base, and since the nozzle body and normally closed valve are not directly energized, there is less risk of limescale adhesion. Since the material can be fixed, there is no risk of cracks or damage caused by vibration.

Furthermore, since the tank is equipped with a normally closed valve, it is possible to prevent water from leaking from the nozzle body when the tank is removed.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

The base 21 in which the heater 21/ is embedded has a vaporization chamber 23 and a steam ejection hole 24 which are communicated through a steam passage 22. 26 is a base lid that covers the steam passage 22 and the vaporization chamber 23, and 26 is a rubber backing that connects the nozzle body 2-8 provided at the bottom of the tank 27 and the vaporization chamber 23 in a watertight manner.

The tank 27 stores water to be supplied to the vaporization chamber 23, and is detachable from the base 21. A nozzle hole 29 communicating with the inside of the tank 27 is bored in the nozzle body 2B. 3o is a normally closed valve made of ferromagnetic material that opens and closes the nozzle hole 29, and is always urged in the closing direction by a spring 31. 32 operates the steam button 33 by hand. In particular, it is an opening/closing valve that opens and closes the nozzle hole 29 separately from the normally closed valve 30, which is vertically movable. 34 is Ki, ferrite or Ni-Cu system, N1-F with one IJ point set at a predetermined temperature
It is a sing-shaped heat-sensitive material made of an e-based alloy, etc., and is fixed on the base lid 25 to easily receive heat from the base 21. A cylindrical permanent magnet 3-6 is magnetized in the radial direction and is positioned on the heat-sensitive material 34 to form a water passage 36. 3
7, 37/ is a yoke made of ferromagnetic material that covers the outer periphery of the permanent magnet a6 and is fixed in contact with the heat-sensitive material 34.

In the above configuration, both FIGS. 2 and 3 show the steam button 33 in the steam state, that is, the on-off valve 32 is raised and in the open state. FIG. 2 shows the state when the temperature of the heat-sensitive material 34 is one point lower, or in other words, the temperature of the base 21 is lower than a value suitable for vaporizing water. does not act, and the normally closed valve 30 comes into contact with the nozzle hole 29 under the elastic force of the tin ring 31ρ and remains closed, and water in the tank 27 is not supplied to the vaporization chamber 23.

Next, FIG. 3 shows the state when the temperature of the base 21 increases and reaches a value suitable for vaporizing water, and the temperature of the heat-sensitive material 34 exceeds a point B7 and loses its magnetism. At this time, N and S magnetic poles appear on the upper surfaces of the yokes 37 and 37', attracting the normally closed valve 3o, and opening the normally closed valve 30 against the elastic force of the spring 31. is supplied to the vaporization chamber 23 through the nozzle hole 29 and the water passage 36 as shown by arrow a. The steam generated here passes through the steam passage 22 and is ejected from the steam ejection hole 24.

Now, if you lower the temperature setting of the base 21 or turn off the power in this state, the temperature of the base 21 becomes too low to evaporate water, and the temperature of the heat-sensitive material 34 drops below one point. In order to restore the magnetism, a magnetic path is formed to short-circuit the N and S magnetic poles appearing on the yokes 37 and 37/, respectively. Therefore, the magnetic force on the upper surface of the yoke 37, 37' decreases rapidly, and the suction force that the normally closed valve 3o was receiving weakens, so the elastic force of the spring 31 returns to the closed state and stops the water supply. .

In this way, depending on the temperature of the heat-sensitive material 34, the normally closed valve 3
By suctioning and separating water, water is supplied to the vaporization chamber 23 only when the temperature of the base 21 reaches a value suitable for vaporization of water.

Furthermore, when the steam button 33 is changed from the steam state to the dry state, the on-off valve 32 descends and contacts the nozzle hole 29 to close it, so water supply is stopped regardless of the operation of the normally closed valve 30. Can be done.

As described above, according to this embodiment, the nozzle body 28 includes the normally closed valve 3o, the heat-sensitive material 34. Permanent magnet 36, yoke 3
Since there is only magnetic force between the tank 270 and the valve control section 7.37', it is easy to attach and detach the tank 270 from the main body. Further, since the nozzle body 28 and the normally closed valve 30 are not directly heated, limescale does not adhere to these parts and reduce the operational reliability of the valve mechanism. And permanent magnet 36
Since the heat-sensitive material 34 is fixed to the base 21, it will not vibrate due to external shock, and since the yokes 37 and 37' are fixed around the permanent magnet 36, the nozzle body 28 and the normally closed There is no direct collision of the valve 30, and there is no fear of cracking or damage. Furthermore, tank 2
When the nozzle hole 29 is removed from the base, the nozzle hole 29 is always closed by the normally closed valve 30, so water leaks to the outside from here.

It never happens.

Effects of the Invention As described above, the present invention provides a nozzle body equipped with a normally closed valve at the bottom of a tank that can be attached and detached from a base, and is compatible with heat-sensitive materials and heat-sensitive materials with a single curri point set at a predetermined temperature on the base. By providing a permanent magnet, it is possible to easily attach and detach the tank from the base, improve both the operational reliability and durability of the valve mechanism, and prevent water from leaking from the nozzle body when the tank is removed. This improves ease of use and has great effects.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a conventional steam iron, FIG. 2 is a sectional view of a main part of a steam iron showing an embodiment of the present invention, and FIG. 3 is an enlarged sectional view of the main part. 21... Base, 23... Vaporization chamber, 2
7...Tank, 2B...Nozzle body, 3
0... Normally closed valve, 34... Heat sensitive material, 3
6...Permanent magnet. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Diagram 4

Claims (1)

[Claims] 0) A nozzle body comprising a base, a vaporization chamber provided on the base, a tank that is detachable from the base for storing water to be supplied to the vaporization chamber, and a normally closed valve provided at the bottom of the tank. The above normally closed valve is made of a heat-sensitive material that is set at a predetermined temperature and fixed in thermal association with the base, and a permanent magnet that corresponds to the heat-sensitive material. A steam eye device configured to open the nozzle body when attracted by the magnetic force of a permanent magnet. (c) The steam iron according to claim 1, wherein the nozzle body is provided with an on-off valve that can be manually operated in addition to the normally closed valve.