Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F75/00—Hand irons
  • D06F75/02—Externally-heated hand irons; Hand irons internally heated by means other than electricity, e.g. by solid fuel, by steam

Definitions

• the present invention relates to a gas iron, comprising a source of pressurized gas, a nozzle for distributing this gas, a venturi for mixing gas and air, a valve for regulating the gas flow rate. , controlled on the one hand by a manual adjustment member, on the other hand, by a thermostatic regulation member, a burner located at the outlet of the venturi, in a combustion chamber adjacent to an ironing soleplate and a gas evacuation burned.
• the advantage of gas is to be able to produce an iron associated with a gas source which thus gives it a total autonomy of a duration which is Fenctian of the importance of the source of gas and the power required.
• Uh such an iron is ideal for making a travel or camping iron insofar as it is autonomous from an energy distributed by a network such as electricity or city gas.
• the autonomy can be of the order of half an hour, which makes it possible to have a light travel iron.
• the thermostatic regulating member is in the combustion chamber itself so that it measures the temperature of the flame and not that of the soleplate, which obviously does not make it possible to obtain a temperature ironed age determined.
• the valve can close while the soleplate has not yet reached its temperature, on the other hand, if the power demanded is significant (in the case of damp laundry) the soleplate can cool without the valve opens.
• GB-A 2 128 641 relates to a gas iron comprising two modules, one formed by a burner and a combustion chamber adjacent to an ironing sole, the other, supply and adjustment. It is specified that the gas flow can be regulated by a thermostat, without the shape of this being specified.
• the FR-A-458 780 offers a thermostatic adjustment mechanism based on the difference in expansion between the ironing soleplate and a porcelain rod which is fixed to the front of the soleplate and whose rear actuates an amplifying lever mechanism movement, intended to control the opening of the gas supply valve.
• the thermal inertia of a porcelain bar lengthens the reaction time, this bar being housed in a tubular channel of the soleplate, the thermal transfer therefore occurs only by air, hence a significant delay up to that the porcelain bar take the temperature of the soleplate.
• the respective coefficients of expansion of iron and porcelain being 10.10-6 and 4.10-6 per oC
• the elongation difference for a difference of 20 ° C, over a length of 20 cm for example is to 0.02 mm, which requires an amplification of an order of magnitude, while the porcelain bar already occupies the entire length of the sole.
• This solution also requires making a thick sole and thereby increasing the thermal inertia.
• thermostabilization of a gas iron has not yet been resolved satisfactorily and by means sufficiently simple for an article of current consumption.
• the object of the present invention is to remedy, at least in part, the drawbacks of the above-mentioned solutions.
• the subject of the present invention is a gas iron according to claim 1.
• One of the essential advantages of the iron according to the invention lies in the fact that it makes it possible to dissociate the heating zone of the sole of the measurement zone and that the regulation is thus carried out with precision and speed as a function of the power requested. Since the regulation is based on a continuous principle without extinguishing the burner, even more regular regulation is obtained than in the case of the all-or-nothing systems used for electric irons.
• Fig. 1 is a top view, cover partially removed, with section along a plane parallel to that of the sole.
• Fig. 2 is an enlarged sectional view along line II-II of FIG. 1.
• Fig. 3 is a view with section on III-III of FIG. 2.
• Fig. 4 is a diagram of the operating temperatures.
• the iron illustrated in FIG. 1 comprises an ironing soleplate 1 intended to be covered with a protective cover 8 (fig. 3).
• This sole carries a perforated wall 2 and a non-perforated wall 4 in which is fixed a venturi 5 and which extends on both sides to the edge of the sole 1 to separate the rear zone, combustion gases exiting through the perforated wall 2.
• the front end of the venturi 5 carries a perforated tube or a grid covered with a foam of platinum mineral fibers and constituting a burner 6 with catalytic combustion, the space delimited by the walls 2 and 4 forming a combustion chamber.
• the upper part of this combustion chamber is closed by a reflecting surface such as a polished aluminum sheet 3 to reverberate the radiation from the burner towards the soleplate 1 (fig.
• An insulation layer 7 is interposed between the top of this combustion chamber and the cover 8 which has, on the one hand, openings 8a for the evacuation of the burnt gases leaving the combustion chamber through the perforated wall 2 in an area extending between this perforated wall and the cover 8 and on the other hand, a window 8b for viewing the combustion.
• the rear end of the venturi 5 is placed opposite a nozzle 9 for distributing combustible gas supplied by a source of pressurized gas, housed in the form of a refillable or interchangeable cartridge 10 in a flap handle table 11 mounted around a conical portion 12a, of a connecting piece 12 of which a cylindrical portion 12b is used for its fixing as will be described later.
• a conduit 13a connects the cartridge 10 to the sectional portion 12a of the connecting piece 12.
• the latter also includes a conduit 13b intended to coincide with the end of the conduit 13a when the folding handle 11 is in its non-folded position illustrated by fig. 2.
• This conduit 13b opens into a bore 14 in which a piston 15 is slidably mounted, a 0-ring seal 16 ensuring the seal.
• This piston 15 itself has an axial duct 17 which ends at its upstream end by a portion of smaller diameter 17a thus providing a valve seat intended to cooperate with a closure member constituted by a needle 18 including a cylindrical portion 19 is slidably mounted in the axial duct 17.
• the cylindrical portion 19 of this needle 18 itself has an axial passage 20 whose rear end comrrunic with the axial duct 17 by a diametrical opening 21 while the front end ends in the nozzle 9.
• a 0-ring seal 22 seals the cylindrical part 19 of the needle in the conduit 17.
• the rear end of the piston 15 presses against a stop constituted by an adjustment screw 23 mounted in leaktight manner in the conical connection piece 12 by means of a 0-ring seal 24.
• This piston 15 is pressed against this screw adjustment 23 by a spring 25.
• the cylindrical portion 12b of the connecting piece 12 is fixed in a support block 26, made of thermal insulating material, secured to the ironing sole 1, by a locking screw 27 tooth tapered end enters a corresponding clearance in the connecting piece 12.
• An annular seal 28 is interposed between the folding handle 11 and the insulating block 26 ensuring at the same time close contact between the conical adjustment surfaces of the folding handle 11 and connecting piece 12.
• the end of the needle 18 which ends with the nozzle 9 is integral with one end of a bimetallic strip 29, the other end of which is connected to the ironing sole 1 by a fixing stud 30 made of a material which is a good conductor of the heat, such as aluminum, which can also be an integral part of the ironing sole 1.
• a screw 31 makes it possible to fix this bimetal strip 29 to this fixing stud 30.
• a small electrical resistance 32 is arranged near the catalytic combustion burner 6. This resistor is connected to a battery 33 via a control switch 34.
• the handle 11 which has the effect of simultaneously putting the conduit 13a in communication with the conduit 13b.
• the adjusting screw 23 is placed in the stop position which has the effect of closing the needle valve by applying the bearing of the axial duct 17a which constitutes the seat against the needle 18, so that the gas is prevented from leaving .
• the position of the seat of the needle valve is fixed as a function of the temperature to which the ironing soleplate 1 desires.
• the gas is then distributed through the nozzle 9 towards of the venturi 5 driving in the burner 6 a mixture of air and gas.
• the switch 34 is closed in order to supply the electrical resistance 32 which becomes red and causes the ignition of the mixture of air and gas and initiates the catalytic combustion.
• the combustion gases and infrared radiation heat the sole 1. Since the ironing sole 1 is made of a material which is highly conductive of heat, such as aluminum or an aluminum alloy, the heat from the combustion chamber is rapidly diffused. to the whole of the lead sole than to the fixing stud 30 of the bimetallic strip 29. On the other hand, the latter, by its position located upstream of the burner 6 with catalytic combustion and of the combustion chamber delimited by the walls 2 and 4, is removed from the influence of combustion gases and therefore only measures the temperature of the ironing sole 1.
• the temperature regulation of the sole is designed so that the flame does not go out, unless the adjusting screw 23 acting on the seat of the needle valve 18 is voluntarily brought into the closed position.
• the bimetallic strip 29 deforms and moves the needle 18 in the direction of the seat 17a of the valve, thereby reducing the gas flow. If, for example, the iron is used for ironing laundry wet, the dissipated energy is important and the cooling of the sole is significant. It quickly results in a deformation of the bimetallic strip in the opposite direction and by an increase in the gas flow rate.
• the diagram in fig. 4 shows the average temperatures measured on the ironing sole 1.
• the portion A of the diagram corresponds to the heating period at the maximum temperature displayed T 1 . It can be seen at the top of the heating curve that the bimetallic strip makes it possible to adjust the gas flow so that the power of the burner compensates for the heat losses.
• Zone B corresponds to an ironing phase for damp laundry. It can be seen that the temperature stabilizes slightly below the maximum.
• the zcne D of the diagram corresponds to the stopping of ironing and to the reduction of the temperature displayed using the adjusting screw 23. It can be seen that the temperature quickly decreases, slightly below the temperature displayed T 2 before to return to stabilize at this temperature.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Irons (AREA)

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• 1986
  • 1986-06-03 WO PCT/CH1986/000075 patent/WO1986007395A1/fr not_active Application Discontinuation
  • 1986-06-03 EP EP19860903182 patent/EP0224512A1/de not_active Withdrawn

Non-Patent Citations (1)

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