JPS59211500A - 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.

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 vaporizing chamber 3 communicating with a steam passage 2 and a steam ejection hole 4. The vaporization chamber 3 is provided in an annular shape around the projection 6. 6
is the base lid that closes the steam passage 2, 7 is the water tank,
A nozzle body 8 is located and fixed under the water tank 7 facing the vaporization chamber 3, and communicates with the inside of the water tank 7.
In addition, the nozzle body 8 is made of a heat-sensitive material such as ferrite, Ni-Cu series, Ni-Fe series alloy, etc., with one Curie point set at a predetermined temperature. The lower end thereof is in contact with the upper end of the peripheral wall 3' of the vaporizing chamber 30, so that heat is transferred from the base 1. 10 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 buffing for guiding the water in the water tank 7 to the nozzle hole 9 without leaking to the outside.

In the above configuration, FIG. 1 shows that a gap is created between the steam iron 14 and the large diameter portion 16 of the shaft 11,
The valve body 10 is in a state where it can operate, and the valve body 10 is in a state where the nozzle hole 9 is closed.

This is because the temperature of the vaporization chamber 3, that is, the temperature of the base 1, is lower than one point of the nozzle body 80 cu, which is made of heat-sensitive material, and the nozzle body 8 and the valve body 1o are magnetically attracted by a force stronger than the elastic force of the spring 17. are doing.

In this state, if the temperature of the base 1 rises and the temperature of the nozzle body 8 exceeds the single point, the nozzle body 8 will not lose its magnetism.
The elastic force of the spring 17 pushes down the valve body 10 and the nozzle hole 9 becomes open.◎When the nozzle hole 9 opens, the water in the water tank 7 is supplied to the vaporization chamber 3, and the steam generated here flows into the steam passage. The steam is ejected from the steam outlet 4 through the steam outlet 2.

In this way, unless the warm temperature of the base 1 reaches a value suitable for vaporizing water, the water supply is automatically stopped, and the hot water that has not completely vaporized is ejected from the steam outlet 4 or the water is not completely vaporized. This is to prevent leakage.

However, in the above conventional example, since the pressing force of the valve body 10 against the nozzle body 8 is determined by the difference between the magnetic attraction force acting between the valve body 1o and the nozzle body and the elastic force of the spring 17, the valve body 10 is formed. This pressing force may vary greatly due to manufacturing variations in the permanent magnet and spring 17, and due to the temperature coefficient of the magnetic properties of the permanent magnet, the pressing force changes depending on the temperature, making operation reliable. In addition, in the conventional example, the valve body 1o is made of a permanent magnet and brought into direct contact with the nozzle body 8 made of a heat-sensitive material, but ferrite, which is a typical heat-sensitive material, However, the material used for permanent magnets is brittle and easily cracked, and external shocks can cause the permanent magnet to vibrate and collide with the temperature-sensitive material, causing cracks in the permanent magnet or the temperature-sensitive material in some cases. Object of the Invention The present invention has been made in view of the above-mentioned drawbacks, and has improved reliability by eliminating unstable elements in operation and eliminating concerns about material durability. To provide a steam iron having a valve device with excellent durability.

Structure of the Invention The Nosteam iron of the present invention includes a base, a vaporization chamber provided in the base, a water tank, a nozzle body that supplies water in the water tank to the vaporization chamber, and a nozzle hole in the nozzle body that opens and closes to supply water. It is equipped with a valve device for controlling the The valve device uses a spring to urge the valve body in the direction of closing the nozzle hole, and combines a permanent magnet with a heat-sensitive material whose temperature is set at a predetermined temperature at a single point of the key. A yoke forming a magnetic circuit is provided to attract the magnetic body connected to the valve body and open the nozzle hole. E. The heat-sensitive material is arranged so that it can easily sense the base temperature, that is, it has good heat conduction.

In the steam iron valve device of the present invention, the valve body and the spring constitute a normally closed valve, the spring keeps the pressing force of the valve body against the nozzle body constant, and the base temperature is maintained at a temperature suitable for vaporizing water. 1, the valve element is opened by attracting the magnetic body connected to the valve element.

In addition, since both the permanent magnet and the heat-sensitive material can be used in a fixed manner, they will not easily vibrate due to the external road surface.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to 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 vaporizing chamber 23 communicating through a steam passage 1g22, a steam ejection hole 24, and a storage chamber 26 that accommodates a valve drive section. It is formed. 26
27 is a vaporization chamber lid, 27 is a water tank, and 28 is a nozzle body fixed to the bottom of the water tank 27, with a nozzle hole 29 communicating with the inside of the water tank 27. 3o is nozzle hole 2
9 is a valve body that opens and closes, and an operating shaft 31 passes through and is fixed thereto. 32 is a steam button 34 protruding from the handle portion 33
is provided above, and below is an opening/closing shaft provided with a cylindrical portion 36 in which a large-diameter portion 35 formed at the upper end of the operating shaft 31 fits vertically, and 37 is a valve body 30 ff biased in the closing direction. The spring 38 is a doughnut-shaped heat-sensitive material made of ferrite, Ni-Cu alloy, Ni-Fe alloy, etc. with one Curie point set at a predetermined temperature. The cylindrical permanent magnet o40.40' provided in contact is a yoke made of a magnetic material, and constitutes a magnetic circuit that short-circuits the N and S magnetic poles of the permanent magnet 39 and the heat-sensitive material 38. It protrudes from the upper end of the magnet 39 and serves as an attraction surface for a magnetic body 41 fixed to the operating shaft 31 and connected to the valve body 30 .

In the above configuration, both FIGS. 2 and 3 show the steam button 34 in the steam state, that is, the opening/closing shaft 32 is lowered and the operating shaft 31 is movable up and down. FIG. 2 shows the state when the temperature of the heat-sensitive material #38 is lower than a cucumber, or in other words, when the temperature of the base 21 is lower than a value suitable for vaporizing water, and the magnetic material 41 has a magnetic force. does not act, and the valve body 30 contacts the nozzle hole 29 under only the elastic force of the spring 37 and is in a closed state, and water in the water tank 27 is not supplied to the vaporization chamber 23.

Next, FIG. 3 shows the state when the temperature of the base 21 rises and reaches a value suitable for vaporizing water, and the temperature of the heat-sensitive material 38 exceeds one point. At this time, yoke 40,4σ
S on the upper end surface of each.

Since the N magnetic pole appears and attracts the magnetic material 41, the valve body 3o connected thereto becomes open, and the water in the water tank 27 is supplied to the vaporization chamber 23 as shown by arrow A through the nozzle hole 29. ◎The steam generated here is transferred to the steam passage 22.
The steam is ejected from the steam ejection hole 24 through the steam ejection hole 24.

The magnetic circuit during operation will be explained with reference to FIG. 4. FIG. 4 shows the case where the temperature of the heat-sensitive material 38 is lower than the Curie point, and since the heat-sensitive material 38 is a magnetic material, the magnetic pole of the permanent magnet 39 is A short-circuiting magnetic path B is formed and does not exert any magnetic effect on the outside. Figure 6 shows heat-sensitive material 3
8 shows a case where the temperature is higher than one point, and since the heat-sensitive material 38 is a non-magnetic material that does not lose its magnetism, the magnetic pole of the permanent magnet 39 passes through the yoke 40 and 40' and is attached to the upper end of the yoke 4o. An S pole appears at the upper end of the yoke 40', and an N pole appears at the upper end of the yoke 40', which attracts and attracts the magnetic body 41, thereby forming a magnetic path C. Furthermore, if the temperature of the heat-sensitive material 38 decreases to below one Curie point in this state, a short-circuit magnetic path will occur in the heat-sensitive material 38 as in FIG. 4, the magnetic flux passing through the magnetic path C will decrease, and the attractive force will decrease. As a result, the magnetic body 41 is pushed up by the spring 37 and returns to the state shown in FIG.

In this way, depending on the temperature of the heat-sensitive material 38, the magnetic body 4
By moving the pot 1 up and down, water is supplied to the vaporization chamber 23 only when the temperature of the pot 1 reaches a value suitable for vaporizing water.

Further, when the steam button 34 is changed from the steam state to the dry state, the opening/closing shaft 32 rises, and the large diameter portion 35 moves into the cylindrical portion 3.
The operating shaft 31 is also raised by being engaged with the lower opening edge of the valve 6, and the valve body 30 is forcibly closed.

As described above, according to this embodiment, the valve body 3 at low temperature
The pressing force of 0 can be determined only by the elastic force of the spring 37, regardless of the magnetic force of the permanent magnet 39, and the pressing force of the permanent magnet 39. The heat-sensitive material 38 can be fixed together, and the magnetic material 4
1 is attracted to the yoke 40, 40', so the movable part does not directly collide with the heat-sensitive material 38 or the permanent magnet 39.

Moreover, FIGS. 6 to 10 show other examples of combinations of permanent magnets and heat-sensitive materials in the steam iron of the present invention. 6 and 7 show a flat plate-shaped yoke 43, 43' around a cubic permanent magnet 42 magnetized in the horizontal direction.
This is an example in which the heat-sensitive material 44 is disposed in close contact with each other, and when the temperature of the heat-sensitive material 44 is higher than a single point, an S pole is formed on the upper end surface of the yoke 43, and an N pole magnet is formed on the upper end surface of the yoke 43'. be exposed. 8 and 9 show a curved plate-shaped yoke 4 surrounding a cylindrical permanent magnet 46 magnetized in the radial direction.
6 and 46' are placed in close contact with each other, and a cylindrical heat-sensitive material 47 is further placed in close contact with the periphery thereof.

When the heat-sensitive material 47 is high in temperature, an S pole is placed on the upper end surface of the yoke 46, and an N pole is placed on the upper end surface of the yoke 46'. This is an example in which yokes 49 and 49' are closely attached to the end face and the upper end face, respectively, and the heat-sensitive material 50 is closely arranged between the yokes 49 and 49', and when the heat-sensitive material 50 is at a high temperature, the yoke 49 An S pole appears on the upper end surface, and an N% appears on the upper end surface of the yoke 49'.

As described above, the permanent magnet and the heat-sensitive material can be freely combined, and the key is to arrange the heat-sensitive material in such a way that the N and S poles of the permanent magnet are short-circuited.

In the embodiments described above, the nozzle hole 29 of the nozzle body 28 is opened and closed directly by the valve body 30, but another valve seat is provided separately from the nozzle body 28, and the temperature of the water supply is controlled by this. Needless to say, it is possible.

Effects of the Invention As described above, the present invention provides a valve body in which a pulp device is biased in the nozzle hole closing direction by a spring.

By combining a permanent magnet and a heat-sensitive material with a yoke that forms a magnetic circuit that attracts the magnetic body connected to the valve body when the temperature of the heat-sensitive material reaches a temperature higher than a single point, it is possible to reduce the temperature when the valve body is closed. Since the pressing force of the valve body against the nozzle body can be determined only by the elastic force of the spring, manufacturing variations in the pressing force can be minimized, and changes in the pressing force due to temperature are also reduced.

Since both the heat-sensitive material can be fixed, there is no chance of the permanent magnet vibrating due to external impact and colliding with the heat-sensitive material, causing cracks or damage, resulting in excellent reliability and durability. is playing.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a conventional steam iron, and FIGS. 2 and 3 are sectional views of main parts showing operating states of a steam iron according to an embodiment of the present invention. Figures 4 and 5 are cross-sectional views of main parts showing the operating state of the pulp device of the same steam iron, and Figures 6 and 7 are examples of combinations of permanent magnets and heat-sensitive materials in the pulp device of the same steam iron. FIGS. 8 and 9 are a plan view and a sectional view showing other combinations, and FIG. 10 is a sectional view showing still another combination. 21... Base% 23... Vaporization chamber, 27
...Water tank, 28...Nozzle body, 3
0... Valve body, 37... Spring, 38
・・・・・・Thermosensitive material 539・・・Permanent magnet, 4
0.40'...York, 41...Name of magnetic agent Patent attorney Toshio Nakao and one other person Figure 1/4 Figure 2 Figure 3 F571-4 Figure 5 Figure 6

Claims (2)

[Claims] (1) a base, a vaporization chamber provided on the base, a water tank, and a nozzle body that supplies water in the water tank to the vaporization chamber;
The pulp device is equipped with a valve body that is biased by a spring in the direction of closing the nozzle hole, a key point of which is set at a predetermined temperature, and a pulp device that controls water supply by opening and closing the nozzle hole of the nozzle body. A permanent magnet is paired with the heat-sensitive material, and when this heat-sensitive material reaches a temperature higher than the curri point, it attracts the magnetic material connected to the valve body and draws it into the nozzle hole. A stibutsu iron consisting of a yoke that constitutes a magnetic circuit to create a magnetic circuit. (2) The steam iron according to claim 1, wherein the valve body has an external operation means for forcibly closing the valve body.