JPH0298399A - Steam iron - Google Patents

Abstract

PURPOSE: To prevent the generation of luster on a woven fabric to be ironed, especially, lining woven fabric by waxing a pipe-shaped heating element on a coating while forming a loop part, and guiding one part of the pipe-shaped heating element between steam jet ports. CONSTITUTION: The thin layer of metal of satisfactory heat conduction such as copper membrane or copper foil, for example, is mounted on an inner surface side 5 of a sole plate 2. A pipe-shaped heating element 4 is brazed on this thin layer. The pipe-shaped heating element 4 is looped and spread over the sole plate 2. A terminal part 10, where a connecting part 9 is disposed, thereof is curved upward inside an inner chamber 7 of a hood 3, guided through the hood 3 and brazed there. Further, a temperature feeler 11 is provided, a connecting part 13 thereof is guided outward, and this feeler 11 is surrounded with one pipe 12. This pipe 12 is composed of special steel as well, one terminal is waxed onto the sole plate 2 or heat conductor layer and the other terminal is brazed into the hood 3 respectively steam-tightly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to a steam iron comprising a sole plate with a steam outlet in the region of the iron point and a steam generator tightly connected to the sole plate. a hood with a connection for, a tubular heating element thermally conductively connected to the sole plate, and a temperature iron, in the upper region of the hood a downwardly opening steam dome is arranged; It relates to a type in which at least one steam conduit opens below the steam conduit and is closely connected to a steam outlet.

BACKGROUND OF THE INVENTION Steam irons of the type described above are used, in particular in the apparel industry, for ironing clothing in mass or semi-volume production. Unlike household irons, where steam is generated inside the iron by heating water.
Steam irons in the industrial sector are connected to a common steam generator at a number of ironing points. Approximately five requirements are placed on such steam irons. 1
First, the weight of the iron must not be too heavy so that the woman doing the ironing can handle it as carefully as possible. Furthermore, from the viewpoint of labor safety and product quality, it is necessary to prevent condensed water from spewing out from the steam outlet. Finally, it must be ensured that the fabric, regardless of its type, does not undergo any changes in its surface structure and, in particular, does not develop any shine.

In order to achieve the desired crease reduction of fabrics, great importance was previously placed on, inter alia, the weight of the iron.

However, since the textile fibers used today can only be wrinkled at relatively low pressures, such requirements have been significantly diminished. Therefore, sole plates that used to be made of gray cast iron have been transitioning to sole plates made of aluminum aluminum for quite some time now! . In this iron, a tubular heating element is housed in the sole plate and is sunk in the hood so that the lugs produce a shine on certain textile fabrics. To prevent this, the sole plate is laminated with a thin film of at least fluorinated hydrocarbon-based plastic.

Particularly with the advent of hard fibers for lining fabrics, aluminum knolls, laminated as well as non-laminated, are not sufficiently resistant to abrasion, which can lead to unfavorable gloss effects in some areas. It turns out that it does. The use of readily available wear-resistant steel materials to solve this problem fails due to their poor thermal conductivity. This is because this has decisive implications, on the one hand, for the service life of the iron and, on the other hand, for the precise temperature control of the sole plate.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a steam iron with a light weight and wear-resistant sole plate that does not adversely affect the quality of the fabrics being ironed.

Means for Solving the Problems In the present invention, starting from the steam iron of the type mentioned at the beginning, the sole plate is made of a thin special steel plate, and a fully open coating with high thermal conductivity is laminated on the inner surface of the sole plate. The above-mentioned problem can be solved by a steam iron of the type in which a tubular heating element is brazed on the coating in the form of a loop, and a part of the tubular heating element is guided between the steam spouts. was able to solve the problem.

The first advantage of using special steel for the sole plate is that it provides almost unlimited wear resistance. This makes it possible to dispense with any laminates, especially in the sole part. Special steels also meet the high corrosion resistance requirements placed on steam irons. On the one hand, the thermal conductivity of high-grade steel is known to be very poor compared to, for example, aluminum.

In order to compensate for this drawback, the sole plate is made of a special steel plate with a thin wall thickness, for example between 1 and 3. However, in this case too, due to poor thermal conductivity,
°This has an adverse effect, especially when switching on and off the tubular heating element. During the ironing process, even if the switch is constantly operated, such as being released by the temperature feeler, even if the switch is in the cutting phase,
The sole plate must also maintain a uniform temperature level. However, since the tubular heating element itself has a good heat storage capacity, it radiates a small amount of constant heat through the surface of the sole plate. To ensure this, the inner side of the sole plate is coated with a metal layer with good thermal conductivity, for example a copper coating layer, to which the tubular heating element is soldered. Due to the well-displaceable metallization layer, a perfect heat distribution over the entire surface of the sole plate is achieved. As a result, by properly arranging the tubular heating elements on the sole plate, a uniform temperature can be achieved over the entire surface of the sole plate. This situation does not particularly change during the disconnection phase of the switch.

Finally, the tubular heating element is also laid in the area of the steam outlet, so that this part is also always exposed to a sufficiently high temperature to prevent the particular formation of condensed water. .

Furthermore, in known steam irons, the jet of condensed water is
This is prevented by preventing the steam inside the hood from directly reaching the steam outlet, and by preventing the steam outlet from opening directly into the steam chamber. In this configuration, a downwardly open steam dome is arranged in the upper region of the hood, and two or more steam conduits open into the dome, and the conduits have a jet on the conduit side. It is adapted to be connected in a steam-tight manner with the outlet or with a distributor for distributing steam to the jets.

For this purpose, known aluminum sole plates with a relatively large wall thickness have a threaded part and a sealing part above the distributor, and a steam conduit is provided through the core part. is connected to the distributor. However, the ability to form the joint and the distributor in this way requires that the wall thickness be fairly thick, and in the structure of the sole plate made of the special steel plate of the present invention, It is impossible to form.

Accordingly, in an embodiment of the invention, the region of the steam outlet and the section of the tubular heating element arranged therein are closely covered by a cap, in which a steam conduit opening into the steam dome is provided. are becoming closely connected.

Condensation prevention devices substantially identical to those known in the state of the art can also be used in the configuration of the present invention. However, in contrast to the state of the art, with the cap provided according to the invention, the upper trap of the spout forms a hermetically connected chamber in which the part of the tubular heating element is also arranged.

This chamber is then preferably connected to the same chamber of the steam dome via only one steam line. As a result, neither condensed water nor droplets accompanying the steam can reach the spout. This is because the dome, together with the vapor conduit opening into its interior, acts as a droplet barrier. Since the tubular heating element is also arranged inside the cap, the required temperature is also ensured in the region of the outlet of the sole plate.

The steam iron formed according to the invention is distinguished not only by the high abrasion resistance of the sole plate, but also by the fact that it never creates a shine on the ironed fabric, especially on the lining fabric. ing.

Yet another great advantage is that the steam iron can be made lighter than any iron of this type known hitherto. That is, it is easily possible to suppress the weight of this iron to 1 kg or less.

However, this has not been possible until now.

The cap, like the tubular heating element, is brazed onto the thermally conductive metal coating of the sole plate, so that the interior of the cap is closed in a vapor-tight manner and is separate from the steam chamber of the hood. They will only be contacted via the steam room.

Implemented in order to be able to heat over the flat part of the sole plate and maintain a particularly uniform temperature level over its entire surface, despite the poor thermal conductivity of the special steel. In the example, the tubular heating element is oriented outwardly with respect to the longitudinal side of the sole plate from a connection located generally in the central longitudinal axis and then parallel to the longitudinal side in the direction of the iron nib. facing, then toward a plurality of loops extending approximately parallel to each other or approximately parallel to the contour of the soleplate, and finally to the ironing point on another longitudinal side, then opposite (Ill. The first loop along the longitudinal side is guided back outwards.

In an advantageous further embodiment of the invention, instead of the above-mentioned type, a tubular heating element is provided in the vicinity of the rear narrow side of the steam iron and on either side of the central longitudinal axis at its two connections. from one connection to the steam outlet, in a forward direction and then back, and then in the outer contour of the sole plate to the opposite side and a final loop. Specifically, it is guided towards the second connection part in a rune section which is located separately inwardly and which is guided forward and then back.

In a further advantageous embodiment of the invention, the ends of the tubular heating elements are guided upwardly from the sole plate through the hood and are soldered to the hood, and A connection is provided on the outside.

In contrast to the known embodiments, this connection is located outside the hood and the interior chamber which is supplied with steam. On the one hand, this significantly increases safety, and on the other hand, the interior of the hood can ultimately be used as a steam chamber, and even if the seal is broken, it is not exposed to danger. No parts are included. This has a similar effect as an increase in weight based on the construction materials.

As a measure to achieve a similar purpose, temperature irons have their connections located inside a single tube;
One of the limb tubes is brazed to the inner surface of the sole plate and the other to the inside of the hood.

The tube receiving the temperature iron is also advantageously made of special steel and is connected by brazing to the inside of the hood and onto the sole plate, respectively, so as to be vapor-tight with respect to the interior of the hood. ing.

In the embodiment described above, it is advantageous if the tube receiving the temperature iron is surrounded on most of its circumference by one loop of the tubular heating element.

In order to achieve perfect temperature control for the sole plate, it is essential to place the temperature iron within the area of the tubular heating element, so that the heat transfer is directly from the tubular heating element onto the temperature iron tube. As a result of the field test, it was found that

Furthermore, it is advantageous if the sole plate is raised upwards on the narrow side opposite the ironing point and the steam connection is provided in this area.

The steam connection can also be brazed in a steam-tight manner in the section of the raised sole plate.

The hood is preferably formed from a deep-drawn part, while the sole plate and the cap can be, for example, stamped parts.

Example An embodiment of the invention is shown in the drawing and will now be described.

In FIG. 1, a steam iron 1 is shown without the usual grip. The steam iron 1 essentially consists of a sole plate 2, a hood 3 and a tubular exothermic rest. The sole plate 2 is made of a special steel plate, for example nickel chrome steel, and has a wall thickness of approximately 1 to 3 m. The hood 3 is also made of special steel and manufactured by deep drawing.

The sole plate 2 is fitted on its inner side 5 with a thin layer (not shown) of a metal with good thermal conductivity, for example a copper film or a copper foil.

A tubular heating element body is brazed onto this thin layer. The sole plate 2 has its rear section 6 raised upwards and is connected over its entire contour to the hood 3 by welding. As a result, the interior chamber 7 of the hood 30 is vapor-tight.

In the section 6 of the sole plate 2 that has been pulled upwards,
A steam connection is provided, which is, for example, screwed or soldered.

This steam connection connects the iron and a steam generator (not shown).

The tubular heating element 4 is laid in a loop on the sole plate 2. Its end 1 where a connection 9 is provided
0 is curved upwards into the interior chamber 7 of the hood 3, guided through the hood 3 and brazed thereto. Furthermore, a temperature iron 11 is provided, the connection 13 of which is led outward, and which is surrounded by a tube 12 . This tube 12 is also made of special steel and is brazed in a steam-tight manner on one end on the sole plate 2 or on the thermally conductive layer and on the other end in the hood 3.

The sole plate 2 has in its front region a number of steam outlets 14 which are covered on the inside by a cap 15 . At the same time, the cap 15 covers the loop part of the tubular heating element 4 located in this area. A single steam conduit 16 opens into the cap 15, and the steam conduit 16 is led upward from the cap 15 and below the steam dome. Steam dome 17 is
It consists of a tube piece soldered to the highest point of the hood 3.

In order for the steam introduced into the hood 3 via the connection part 8 to enter below the cap 15 and pass through the spout 14, an obstacle formed by the steam dome 17 and the steam conduit 16 is required. must be overcome. Due to the steam-tight connection between the cap 15 and the sole plate 2 on the one hand and the aforementioned obstructions on the other hand, condensed water or water droplets entrained by the steam cannot penetrate the spout 14. cannot reach the outside world.

Despite the poor thermal conductivity, sole plate 2
In order to be able to achieve uniform heating within the sole plate 2, as already mentioned, a tubular heat-generating rest is laid on the sole plate 2 in the form of a plurality of loops. One embodiment of the installation type is shown in FIG. From the connections 9' of the heating element connections located on both sides of the longitudinal center plane, the tubular heating element 4 is first guided forward in an inner short loop 18, then back again to the narrow side and then into a large It is guided forward again in the loop section 19 and then back again to the narrow side. In the forward part of the loop part 19, the tubular heating element 4 is laid between the parts of the steam outlet 14, where it is located below the cap 15, which is shown in broken lines in FIG. The tubular heating element follows the end of the loop part 19 located in the region of the narrow side of the sole plate 2, with its section 20 pointing towards the front and approximately parallel to the outer contour of the sole plate 2. 21, the section 22 of which returns from there again along the outer contour of the sole plate 2 to the narrow side and into the connecting part 9''. The 1-ra 23 is placed immediately after the cap 15.

A simpler and more advantageous embodiment is shown in FIG. The tubular heating element is again guided forward in a first inner loop section 24 approximately parallel to the axis, then back to the narrow side, and then the section 25 is guided forward along the outer contour of the sole plate. 2, the section 26 which is guided towards the iron point 21 and from which it extends approximately parallel to the contour of the sole plate returns again to the narrow side and finally forms a loop section 27 which approximates the loop section 19 of FIG. It is guided forward inside, then back again to the narrow side and guided into the connection 9''.

In the embodiment of FIG. 3, the temperature tween 23 is located in the curved portion of the loop portion 24 of the tubular heating element. Therefore, the tube receiving the temperature tween (numeral 1 in Figure 1)
2) is partially surrounded by a tubular heating element.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention. Fig. 1 is a schematic longitudinal cross-sectional view of a steam iron with the grip portion omitted, and Fig. 2 shows the arrangement of the tubular heating element of the first embodiment, shown on the inner surface of the sole plate. FIG. 3 is a plan view corresponding to FIG. 2 in which the tubular heating body is arranged differently. 1... Steam iron, 2... Sole plate, 3...
...Hood, cow...Tubular heating element, 5...Inner side, 6
... Rear section, 7... Inner room, 8... Steam connection section,
9, 9'. 9"...Connection part, 10...End part, 11...Temperature twin, 12...Pipe, 13...Connection part, 14...
Steam spout. 15... Cap, 16... Steam conduit, 17...
Steam dome, 18. IQ...Loop part, 20...Division, 21...Iron point, 22...Division, 23
...Temperature tween, 24...Loop part, 25.26.
27...Division. Procedural amendment (method) % formula % Display of the case 1999 Patent Application No. 2゜ Name of the invention Steam Ein 3゜ Person making the amendment Relationship with the case

Claims (1)

[Claims] 1. A steam iron, comprising a sole plate with a steam outlet in the region of the iron point, and a connection for a steam generator closely connected to the sole plate. It has a hood, a tubular heating element thermally conductively coupled to the sole plate, and a temperature feeler, with a downwardly opening steam dome disposed in the upper region of the hood and a steam outlet below the hood. In the type in which at least one steam conduit is open and tightly connected to the
A metal coating with high thermal conductivity is laminated on its inner surface (5), and a tubular heating element (4) is placed on the loop portion (
18, 19 to 25, 26, 27) are brazed together, and a part of the tubular heating element (4) is guided between the steam spouts. 2. The area of the steam outlet (14) and the section of the tubular heating element (4) arranged there are tightly covered by a cap (15), which has a steam dome. (
2. Steam iron according to claim 1, characterized in that the steam conduits (16) opening into the steam iron (17) are tightly connected. 3. Steam iron according to claim 1 or 2, characterized in that only one steam conduit (16) connects the dome (17) to the cap (15). 4. Steam iron according to claim 1, characterized in that the cap (15) is brazed onto the thermally conductive metal coating of the sole plate (2). 5. The tubular heating element (4) is oriented outwardly against the longitudinal side of the sole plate (2) from the connection (9') located approximately in the central longitudinal axis and then ironed parallel to the longitudinal side. towards the point (21) and then towards a plurality of loops (18, 19) extending substantially parallel to each other or substantially parallel to the contour of the sole plate (2) and finally
Go along another longitudinal side to the iron point (21) and then along the opposite longitudinal side to the first loop section (
Steam iron according to any one of claims 1 to 4, characterized in that it is guided back towards the outside of 18). 6. The tubular heating element (4) has its two connections (9', 9'') in the vicinity of the rear narrow side of the steam iron (1) and on both sides of the longitudinal central axis; Connection part (9″)
The first loop section (
27) inwards, towards the front and back, then in the outer contour of the sole plate (2), extending to the opposite side (26, 25) and finally separately inwardly. Claims 1 to 4 characterized in that it is guided in a loop part (24) located and guided forward and back towards the second connecting part (9'). The steam iron according to any one of the preceding items. 7. The end (10) of the tubular heating element (4) is guided upwardly from the sole plate (2) and through the hood (3) and is brazed to the hood and outwardly of the hood. 7. Steam iron according to claim 1, characterized in that a connection (9) is provided. 8. The temperature feeler (11) with its connection (13) is arranged in a tube (12), which tube (12) has one side above the inner side (5) of the sole plate (2). 8. Steam iron according to claim 1, characterized in that the other side of the iron is brazed into the hood (3). 9. From claim 1, characterized in that the tube (12) receiving the temperature feeler (11) is surrounded over most of its circumference by a loop section of the tubular heating element (4). 8. The steam iron according to any one of items 8 to 8. 10. The sole plate (2) has an iron tip (21
) is raised upwards, and in this area a steam connection (8) is provided. The steam iron according to any one of the above. 11. Steam iron according to claim 1, characterized in that the hood (3) is formed from a deep-drawn part.