DE3603229A1 - DRIP VALVE FOR STEAM IRON - Google Patents

Description

Drip valve for steam iron

The invention relates to a drip valve of the type mentioned in the preamble of claim 1.

Such steam irons have an evaporation chamber which is arranged in the soleplate of the iron and which is provided by the heating elements or heating resistors the iron is heated. There is also a water reservoir in the upper part of the steam iron arranged and this water reservoir is via a channel with the evaporation chamber connected, wherein a drip valve is arranged in this channel. This drip valve enables a selective adjustment of the water flow to the connecting chamber.

\\ j A known steam irons of this kind is described in DE-PS 29 36 812th In this steam iron, a bimetal spring sheet is placed in this evaporation chamber to clean the evaporation chamber, one edge of this bimetallic spring sheet scraping across the bottom of the evaporation chamber when the temperature changes, removing limescale deposits in this evaporation chamber. In this known steam iron, however, there is the undesirable possibility that drops of water instead of steam emerge from the evaporation chamber when the evaporation chamber is at a comparatively low temperature.

TY The invention is based on the object of a simple to create a built-in steam iron that is

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represents that only steam escapes and in which the amount of steam and an automatic cleaning of the evaporation chamber is easier to achieve.

This object is achieved by the features specified in the characterizing part of claim 1.

Advantageous refinements and developments of Invention emerge from the subclaims.

In the one provided with the drip valve according to the invention Steam iron is automatically prevented that water gets into the evaporation chamber before it has a sufficient temperature for evaporation has reached, so that under no circumstances unevaporated water droplets escape from the evaporation chamber can.

In the case of the drip valve according to the invention, the upper end of the valve rod is in a valve rod carrier held, which is axially displaceable, but non-rotatably, held in an actuating button. The valve rod support and the valve rod are made with the help of a spring downwards towards the closed position of the drop valve in which the lower end of the valve rod engages the valve seat stands. The valve rod carrier has a radially outwardly extending cam follower, the cooperates with the axial end face of a cam ring surrounding the valve rod, the end face of which bearing surface has a changing height over the circumference. Depending on the turning

Position of the cam follower in relation to the cam ring allows the valve rod carrier and the valve rod to move move more or less towards the closed position. The cam ring is from the top end an actuating part carried, the lower end of which is supported on bimetal elements that connect to the evaporation chamber are thermally coupled and the actuating part when an evaporation temperature is reached and thus the valve rod against the action of the spring via the cam ring and the valve rod carrier lift off the seat, the rotational position of the cam follower relative to the cam ring being the extent of this opening of the drip valve. The rotary position of the cam follower is with the help of the operating button from adjustable on the outside of the steam iron.

The end face of the cam ring has two sections inclined with respect to the vertical, the height of which is as follows is dimensioned that the one section of the end face an adjustment of the steam outlet between a Maximum position and the value zero (for dry ironing) allows, while the other section a lifting of the valve rod on the valve seat independently of the Temperature of the evaporation chamber to such an extent that self-cleaning is possible is.

The invention is illustrated below with reference to in the drawing illustrated embodiments explained in more detail.

In the drawing show:

Fig. 1 is a schematic perspective

View of a steam iron with an embodiment of the drip valve, parts are shown cut away to reveal the internal structure of the steam iron,

FIG. 2 is a side view of the one shown in FIG

parts before reaching the evaporation temperature, whereby the Drip valve is closed, as shown in the partial view shown in the circle can be seen more precisely,

3 shows a view corresponding to FIG. 2,

at which the evaporation temperature has been reached and the valve stem is lifted from the valve seat, as shown in the detail shown in the circle can be seen more precisely,

FIGS. 4 and 5 show the position schematically

and the mode of operation of the individual parts of the drop valve 1 s when the valve rod carrier is brought into the operating position is, the embodiment of the drip valve in Fig. 4 in the closed State and is shown in Fig. 5 in the open state. The cut

view of the cam ring corresponds to the section line 21-21 of Fig. 9,

Figures 6 and 7 are schematic representations of the position and the mode of operation of the components of the embodiment of the drop valve, when the valve rod support is in the closed position of the drip valve was rotated, whereby the deformation of the bimetal elements is also no causes the drip valve to open,

Fig. 8 is a schematic representation of the Posi

tion and the mode of operation of the. Components of the drip valve, if the valve rod carrier was moved to the self-cleaning position in which the valve is always completely open, regardless of the position of the bimetal elements,

9 is a schematic perspective view

view of an embodiment of the cam ring, of the two end face sections inclined with respect to the vertical having.

The steam iron shown in Figs has the following parts:

a water storage tank (1) an evaporation chamber (2) a valve rod (3)

a valve seat (4) with a front end (5), a valve rod support (6) a cam follower (7) an actuating button (8)

a bridge-shaped actuating part (9)

Guide pins (10,11) a cam ring (12) bimetal blades (14,15)

inclined cam faces (13.20) of the cam ring

ei ne spring (16) an evaporation chamber cover (17) an upper partition (18)

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an elastic retaining washer (19) for the valve seat 4

a position indicator (21)

In the illustrated embodiment of the steam valve the water flows from the water reservoir 1 into the evaporation chamber 2 via an embodiment of the drop valve, which consists of the valve seat 4 and the valve rod 3 consists, the front end 5 or opens the valve when moving in the vertical direction closes.

The valve rod is attached at its upper end to a valve 1 rod support 6, which is cylindrical and hollow and which has a cam follower on its side surface, which in the manner shown in the radial direction protrudes. Any longitudinal or rotary movement carried out by the valve rod carrier is applied to the valve rod 3 transferred.

At its upper end, the valve rod carrier 6 is coupled to an actuating button 8 into which the valve 1 rod carrier is inserted telescopically, as can be seen from Figures 4 to 7, wherein it is ensured by a corresponding shape of the Venti1 rod carrier and the actuating button that this Although the two parts are non-rotatably connected to one another, they can be displaced relative to one another in the axial direction. Between the actuator button 8 and the valve rod carrier 6, a spring 16 is arranged, which the front End 5 of the valve rod 3 in the direction of the valve

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seat 4 is biased, the force of this spring 16 being able to counteract a force which is exerted on the cam follower 7 by a cam ring 12. This cam ring 12 has an inclined, facing the cam follower end face, so that it can be opened more or less depending on the ⁵ relative rotational position between the cam ring 12 and the cam follower and the valve rod support the drip valve, as will be explained in more detail.

The cam ring 12 is at the top of a bridge-shaped Fastened actuating part 9, which has two legs at its lower end, which end in guide pins 10,11, each on bimetal sheets 14.15 rest on the cover 17 of the evaporation · chamber 2 are arranged.

The cam ring 12 arranged at the upper end of the bridge-shaped actuating part 9 has two cam surfaces forming end face sections 13, 20, which are inclined relative to the vertical due to the different heights of the lateral surface of the cam ring are. The cam ring further has a central opening with a cross section such that the Venti1 rod carrier 6 can move freely within this cam ring, but with the extent of the inward movement of the valve rod carrier 6 in this cam ring is determined by the cam follower 7, the on the end face sections 13, 20 of the cam ring is up.

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If the operating button 8 is brought into the position for the strongest steam generation, then corresponds this one rotational position of the valve rod carrier 6, as shown in FIGS is, wherein the cam follower 7 on the inclined end face portion 13 of the cam ring on rests on the highest point of this section, whereby the drip valve remains in the closed state, when the evaporation chamber is cold, because then the bimetal sheets 14.15 are at their lowest The position shown in FIGS. 2 and 4 is located. If the bimetal 1 sheets 14,15 due If the temperature of the evaporation chamber 2 increases, they press the guide pins 10 and 11 and thus the bridge-shaped actuating component 9 with the cam ring 12 upwards, whereby the Cam follower 7 of valve rod carrier 6 is moved upward against the action of spring 16. The interaction between the bimetal sheets 14,15 and the spring 16 is such that the drip valve only then opened when the temperature is high enough to evaporate. If this temperature is not sufficient, so the cam ring 12 is not moved down sufficiently so that the water supply through the drip valve is interrupted. When the temperature is sufficient, the bimetal 1 sheets 14, 15 compress the spring 16, so that the valve rod 3 can lift from its valve seat 4 and water to the evaporation chamber is supplied to form steam. This position with sufficient temperature and open Drip valve is shown in FIGS.

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The use of the diametrically arranged Bimetal sheets 14,15 together with the shape of the bridge-shaped actuating part 9 a symmetrical and sufficient force to avoid any frictional resistance when the evaporation chamber is sufficiently heated and the force of the spring 16 can be overcome.

If the operating button 8 is brought into the other extreme position, which corresponds to dry ironing, As shown in Figures 6 and 7, the valve rod carrier 6 is rotated so far that the Cam follower 7 on the lowest point of the end face section 13 of the cam ring 12 lies, and in this case the drip valve is not only on a cold steam iron closed (Fig. 6), but also at a temperature of the steam iron that is sufficient for evaporation would (Fig. 7), because even the heating of the bimetal sheets 14,15 and their deflection, which on the bridge-shaped component 9 is transferred, is not sufficient, so that the cam ring 12 pushes the cam follower 7 sufficiently far upwards. In this case, the Valve rod 3 regardless of the temperature of the iron in plant en the valve seat, so that the drip valve closed is.

In this way it is selectively possible without steam generation regardless of the temperature of the steam iron to iron.

Of course, between the two described extreme positions of the cam follower 7 along the

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Stirriflächenabschnittes 13 of the cam ring 12 a Variety of setting positions possible, the specific Steam amounts correspond to a certain extent of the deflection of the bimetal sheets 14,15. In order to it is possible to determine the amount of steam taking into account the temperature of the evaporation chamber.

When the actuating button 8 is brought into the self-cleaning position according to FIG. 8, the valve rod carrier 6 is rotated so that its cam follower 7 on the end face section 20 of the cam ring 12 rests, which has such a height of the lateral surface at this point that the drip valve is always complete is open regardless of the temperature of the steam iron. In this case, the Bimetal 1 sheets 14,15 the position of the bridge-shaped Change the actuating component 9 via the guide pins 10, 11, the relative position of the valve rod 3 opposite however, the valve seat 4 is such that the lower end 5 of the valve rod 3 never allows the flow through of water through the drip valve.

In order to have more precise control of the flow of water through the drip valve, the lower one ends End of the valve rod 3 in a pin which has a lateral bevel and thus a reduction in cross section has, as can be seen in the details of Figures 2 and 3 shown in the respective circles is. This bevel at the lower end of the valve rod 3 also enables elimination of

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Deposits in the opening of the valve seat 4 through Turning the operating button 8 and thus the valve rod 3, without the need for additional devices are.

From the enlarged details of Figures 2 and 3 it can also be seen that the valve seat 4, the is preferably made of metal, in order to achieve a good seating surface, in an elastic retaining disc 19 is supported from plastic material, the upper and lower annular projections having between the surfaces of the lid 17 of the evaporation chamber 2 and the upper partition wall 18 are arranged. This is an elastic mount for the Venti l seat 4 possible.

9 shows details in a perspective view of the cam ring 12 with the two inclined end face sections 13 and 20. The inclined end face section 13 determines the working positions of the valve rod depending on the rotational position of the cam follower 7 of the Venti1 rod carrier 6 in connection with the deflection of the bimetal sheets 14,15, as already done has been described. The other inclined end face section 20 only comes into effect in the self-cleaning position, as described with reference to FIG. 8 became. In Fig. 9, the section line 21-21 is also shown, which the sectional views in Figures 4 to 7 correspond.

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Claims (3)

Patent Attorneys Dipl.-Inc ,. Curt Wallach J European patent agent D i pi.-Ing. Günther Koch ~ European Patent Attorneys O fi Π 7? ? Q 01P1 - ^ 3 'Dr Tino Haibach οουοΔΔΌ Dip | _ | ng> Rainer Feldkamp D-8000 Munich 2 Kaufingerstraße 8 Telephone (0 89) 2 60 80 78 Telex 5 29 513 wakai d Date: February 3rd 1936 OFICINA DE I NVESTI GAC I ON Our reference: 18 257 - F / r AGRUPADA, SA Drip valve for steam iron patent claims 1. Drip valve for steam iron that connects the water reservoir with the evaporation chamber of the steam iron and a vertically movable Has valve rod and a valve seat which cooperates with the lower end of the valve rod, thereby characterized in that the valve rod (3) is attached to a valve rod carrier (6) which is axially displaceable, but non-rotatably, held in an actuating button (8), that between the actuating button (8) and the valve 1 rod carrier (6) a spring is arranged, the the valve rod (3) in axial direction against the valve seat (4) biases in the closing direction that the Venti1 rod carrier (6) at its lower end extending outward in the radial direction Has cam follower (7) which is connected to an end face of a cam ring surrounding the valve rod (3) (12) cooperates, the outer surface of which carries the end face (13, 20) over the circumference changing height has that the cam ring (12) attached to the upper end of an actuating part (9) that surrounds the valve rod and at least one at the lower end on the free end Bimetal element (14,15) rests, which is thermally coupled to the evaporation chamber (2), so that the opening movement of the drip valve depends on both the rotary position of the actuating button (8) as well as on the temperature of the evaporation chamber (2), and that the drip valve only then can be moved into the open position when the evaporation chamber ( 2) Has reached evaporation temperature. r 2. drip valve according to claim 1, characterized geke η η - Draw t that the actuation part (9) is in the form of a bridge is formed and on its downwardly extending legs (9) each have a guide pin (10,11), which is formed on the free end of a respective bimetal sheet (14,15) Bimetal element rests. 3. Drip valve according to claim 1 or 2, characterized in that the end face of the Cam ring (2) with respect to the vertical inclined sections (13,20), of which the first section (13) is used to regulate the steam output between a minimum value and the value zero, while the second section (20) has an end which corresponds to such a height of the lateral surface that the drip valve is fully open regardless of the temperature of the evaporation chamber (2).