Vaporization chamber for a hair styling device that disperses steam

Abstract

The present invention relates to an evaporation chamber for a hair styling appliance diffusing steam, the evaporation chamber comprising a hollow body defining a free interior space between at least one inlet for supplying liquid water to be evaporated and at least one outlet for water in steam form, said steam chamber being characterised in that one or more inlets for supplying liquid water together have a plurality of orifices spaced apart from one another leading into the interior of the evaporation chamber.

Description

Technical Field

[0001] The present invention relates in particular to a vaporization chamber for a hair styling device intended to diffuse steam and to shape or style hair. The device is, more particularly, a hairbrush capable of diffusing steam onto the hair.

Background Art

[0002] In particular, many types of household electric hair styling devices are known for shaping hair, such as by straightening, curling or crimping. Straight or curling irons, or hairbrushes, may be mentioned as an example. These devices may comprise one or more heated or heating treatment surfaces. The general design of such devices is well known.

[0003] To improve the treatment, some devices emit steam for some time towards the surface being treated, in particular in the case of hair styling devices, towards the hair strands or the entire hair.

[0004] Thus, Patent Document 1 describes, for example, a curling iron that can be gripped between two articulated arms and emit steam onto a hair strand wound around said arms. The steam is generated directly from a reservoir containing liquid water, and thus this also serves as a vaporization chamber. Patent Document 2 implements a similar system, which differs in that the reservoir is moved away from the portable treatment unit to allow an increase in the reservoir capacity.

[0005] For those parts, Patent Document 3 and Patent Document 4 describe straightening iron type devices that can also emit steam onto a strand gripped between two arms each provided with a heating plate. In Patent Document 3, the liquid water contained in the reservoir contacts the evaporation plate via a porous pad. In Patent Document 4, the steam is generated in a steam generator remote from the treatment unit and is not described in detail.

[0006] Finally, mention may also be made of brushes and combs, heated or not, capable of directing steam through the hair during use. By way of example, reference may be made to US Pat. No. 5,399,433 and US Pat. No. 5,499,466, which provide few details regarding the method of generating steam.

[0007] However, some devices are known that generate steam by means of a steam generator essentially consisting of a chamber supplied with liquid water from a separate reservoir, which is heated to a temperature high enough to evaporate the liquid water. Such a system makes it possible to optimize and better control both the flow rate of steam delivered and the energy consumed for evaporation.

[0008] The steam thus generated is then brought to or near the treatment surface where it is delivered through one or more nozzles. For a precise description of such steam generators, useful reference can be made, inter alia, to US Pat. No. 5,399,623, US Pat. No. 5,499,636, US Pat. No. 5,499,649, US Pat. No. 5,599,713, US Pat. No. 5,599,721, US Pat. No. 5,599,733, and US Pat. No. 5,599,742.

[0009] A common problem among equipment implementing steam processing is the build-up of scale in their steam generators, which can result in the inlet orifices for liquid water and / or the steam outlet orifices becoming blocked.

[0010] Furthermore, unlike clothes ironing type devices, where a certain amount of scale reaching the steam delivery orifice may be tolerable, this would be undesirable in the case of hair treatment devices. In any case, the steam flow rate of these devices is very small (0.5-5 g.min -1 , especially for modern instruments which are particularly compact and incorporate all elements in a single portable unit. -1 ), which is insufficient to dislodge the scale that reaches the diffusion orifice.

[0011] The particles of scale must therefore be kept in the vaporization chamber, which is conventionally achieved, as described in US Pat. No. 5,399,433, by equipping the vaporization chamber with one or more chicanes, preferably located at a distance from the inlet for liquid water. The chicane thus makes it possible both to prevent the circulation of liquid water that has not yet been vaporized towards the steam outlet orifice and to keep the particles of scale formed at the inlet for liquid water.

[0012] Various solutions exist for slowing down or reducing the build-up of scale at the inlet for liquid water in such equipment.

[0013] The first solution is to use distilled or pure water, however this is not very practical and users generally prefer to be able to use tap water directly.

[0014] The second solution is to install a scale filtration system between the reservoir and the steam generator. However, such a solution is difficult to envisage in "all-in-one" portable equipment that has very limited space to accommodate all components. Moreover, the presence of such a filter creates a pressure drop that can have a negative effect on the pumping members intended for the transport of liquid water from the reservoir to the vaporization chamber.

[0015] Yet another solution would be to make the vaporization chamber removable to allow cleaning. As already mentioned, this would be difficult to implement in an "all-in-one" device for home use. Furthermore, the vaporization chamber is a sensitive component and it would be appropriate for it to be able to be completely safely removed and reattached by the user.

[0016] US Patent No. 5,399,633 provides a solution to the problem of scale deposition by providing an inclined vaporization element, allowing the scale particles and other particles to fall from the vaporization element for collection. Besides the above-mentioned problems of incorporating a collector in an appliance that needs to be particularly compact, hair treatment appliances such as irons or brushes are handled in such a way that they can be placed in any orientation. Thus, the idea of ​​an inclined wall and particle fall loses its appeal.

[0017] US Pat. No. 5,399,633 provides for at least partially covering the inner surface of the vaporization chamber with a hydrophobic layer, said layer being located at least below the injection point of liquid water. Due to the presence of the hydrophobic layer below the injection point, this liquid is further repelled at this particular location, thus avoiding vaporization of this liquid at this particular location. Although effective, this solution makes the manufacture of the chamber more complex and more expensive.

[0018] Alternatively or additionally, on the other hand, in the patent application EP 1 099 636 A1, an inlet pipe for liquid water is provided in the vaporization chamber, which has an opening extending substantially along the injection pipe from the free end forming the injection point, which opening has a shape that allows the liquid coming from the reservoir to flow into the vaporization chamber in case of accumulation and deposition of scale at the free end of the injection pipe. Such a solution does not require modifying the basic design of the vaporization chamber. However, in case of accumulation of scale at the end, the liquid water must then be stored in a quantity sufficient to pass the height of the blockage. It was also noted that in the case of vaporization chambers heated to high temperatures (for example above 180° C.), such a design does not allow an optimal distribution of scale, and evaporation occurs very rapidly and in a very localized manner. [Prior art documents] [Patent documents]

[0019] [Patent Document 1] U.S. Patent No. 2,880,299 [Patent Document 2] European Patent No. 3097815 [Patent Document 3] US Patent Publication No. 20040000319 [Patent Document 4] US Patent Publication No. 2009188516 [Patent Document 5] Korean Patent Publication No. 2003-0085159 [Patent Document 6] German Patent Application Publication No. 19822718 [Patent Document 7] U.S. Pat. No. 3,934,597 [Patent Document 8] U.S. Pat. No. 3,921,648 [Patent Document 9] International Publication No. 2017174035 [Patent Document 10] International Publication No. 2017089582 [Patent Document 11] International Publication No. 2020127851 [Patent Document 12] International Publication No. 2020127852 [Patent Document 13] European Patent Application Publication No. 2449909 Summary of the Invention [Problem to be solved by the invention]

[0020] The present application aims to propose alternative or complementary solutions to some of these systems, making it possible to address their limitations. [Means for solving the problem]

[0021] To this end, the present application relates to a vaporization chamber comprising a hollow body defining a free interior space capable of allowing fluid circulation between at least one inlet for supplying a liquid product to be vaporized and at least one outlet for said at least partially vaporized product.

[0022] According to the invention, the vapor chamber is characterized in that one or more inlets for supplying the liquid product lead into the interior of the vaporization chamber together with a number of orifices spaced apart from one another by at least 5 mm, preferably at least 8 mm or even at least 10 mm.

[0023] Thus, by providing a number of separate and spaced orifices for introducing liquid water into the evaporation chamber, the risk of blockage of the liquid water supply is greatly reduced. In particular, if an orifice accumulates enough scale to become clogged, it is still possible for the liquid water to pass through the other available orifice or orifices. This also allows for a better distribution of the scale, as the liquid water is vaporized at different locations in the chamber and is no longer substantially vaporized at a single location. This of course allows the scale formed by evaporation to be better distributed in the chamber, and as a result the risk of complete blockage occurs after some time.

[0024] Furthermore, this affects the vaporization chamber design only slightly and in a relatively easy to implement manner, since no additional parts or additional coatings are required.

[0025] Preferably, the product to be vaporized is water, in particular water that has not been demineralized, distilled, and filtered. Preferably, the water used has a hardness greater than 8°F, preferably greater than 15°F. Preferably, the water used has a hardness of 30°F or less. If necessary, the water used may optionally be softened to reduce its hardness to 15-30°F, preferably 15-20°F.

[0026] The plurality of orifices provided may advantageously be more than three, in particular between 3 and 10 orifices.

[0027] The orifices may each have a cross-section that is generally circular, but more preferably is oval.

[0028] The orifices are 0.1 to 6 mm. 2 The cross section may be

[0029] According to a first embodiment, the inlet for supplying the liquid product is in the form of a tube having an end, which extends into said vaporization chamber and along which a plurality of orifices are spaced apart. In particular, the supply inlet consists of a single tube.

[0030] Although WO2017174035 provides an inlet for liquid water in the form of a tube 1125 with multiple feed orifices 1140 opening on both sides of the tube, it should be noted that the evaporation chamber does not define a free space as in the present application, but comprises a porous material 1126 occupying said internal volume. According to the present application, the evaporation chamber has at least a free space without porous material around the orifice for feeding liquid water (at a distance of at least 2 mm, or 5 mm, or even better 10 mm from the orifice for feeding liquid water). The free space in particular allows the liquid water leaving the orifice to come into direct contact with at least one evaporation surface of the chamber. Preferably, the evaporation chamber is completely free of porous material.

[0031] Preferably the orifices are regularly spaced, in particular an orifice may be provided every 5 mm along the tube, the end of the tube extending into the vaporisation chamber may conveniently be 20-60 mm, typically around 39-40 mm.

[0032] Advantageously, the orifices are distributed substantially along the entire length of the end of the tube forming the feed inlet.

[0033] Preferably, the end of the tube forming the supply inlet has a closed distal end.

[0034] According to a variant of the preferred embodiment, the orifices are provided along at least two longitudinal axes of the tube, which between each other form a non-zero angular sector with the central longitudinal axis of the tube. In other words, the orifices are provided offset along the tube. Preferably, the angular sector is substantially equal to 180°, which means that the orifices are arranged diametrically opposed to the central longitudinal axis of the tube along longitudinal axes located on either side of the central longitudinal axis of the tube.

[0035] Preferably, the orifices are arranged, at least for some of them, and preferably for all of them, alternating along the two longitudinal axes.

[0036] According to a second embodiment, the vaporization chamber comprises a plurality of inlets for feeding the liquid product to be vaporized, each feed inlet having at least one orifice leading into the vaporization chamber.

[0037] According to a first variant, the at least one inlet for feeding the liquid product to be vaporized has a single orifice leading into said vaporization chamber. Preferably, the orifice is in the form of an open distal end of the inlet for feeding the liquid product to be vaporized. This open distal end may be beveled or cut longitudinally, as described in the aforementioned WO2020127852.

[0038] Preferably, all the supply inlets each have a single open orifice. Alternatively, at least one inlet may be a tube according to the first embodiment.

[0039] According to one particular embodiment, at least some of the orifices leading to the interior of the vaporization chamber, and preferably all of the orifices, open at a non-zero distance from the inner surfaces of the body forming said vaporization chamber, these inner surfaces comprising the surfaces of the peripheral wall and, possibly, the surfaces of the internal chicane.

[0040] The present application also relates to a domestic appliance for diffusing vapours, comprising at least one reservoir capable of containing a number of liquid products to be vaporised, fluidly connected to at least one inlet for supplying the liquid product to a vaporisation chamber separate from the reservoir, said vaporisation chamber having at least one outlet for the at least partially vaporised product, fluidly connected to a vapour diffusion orifice of the treatment surface of the appliance. According to the present application, the appliance is characterised in that the vaporisation chamber is a chamber according to the invention as described above.

[0041] The term "appliance" is understood to mean devices and tools that use electricity and are intended to be used for purposes within the home.

[0042] Preferably, the product to be vaporized is water, in particular water that has not been demineralized, distilled, and filtered. In particular, the water used has a hardness greater than 8°F, preferably greater than 15°F. Preferably, the water used has a hardness of 30°F or less. If necessary, the water used may optionally be softened to reduce its hardness to between 15 and 30°F, preferably between 15 and 20°F.

[0043] Advantageously, the vaporization chamber can furthermore be supplied with the liquid product contained in the reservoir via at least one active pumping member, preferably an electric member, in particular a positive displacement pump, such as a peristaltic pump or a membrane pump.

[0044] In the case of a vaporization chamber with several inlets for liquid water, the supply from the reservoir may take place via a dedicated pipe. However, it would be possible to use a tube with one or several branches, so that the reservoir has a single outlet and a single pumping member delivers water towards several branches, each connected to the liquid water inlets of the vaporization chamber. It should be noted, however, that such branches are prone to bursts or irregularities in the supply of liquid water, and a solution employing a tube and a dedicated pumping member is preferred. Furthermore, the supply tube or those branches downstream of the branch may be equipped with a non-return valve.

[0045] Preferably the device is a hair styling device such as a straightener or a hairbrush.

[0046] The term "brush" means a device for treating hair comprising a single arm carrying a number of tines on which the hair is received as the brush passes over the scalp. The brush may have a single row of tines, in which case it is also called a comb, or it may have multiple rows of tines. The brush may comprise a heated surface. The tines may also be actively heated or may not be heated.

[0047] "Straightener" means a hair treatment device having two arms that articulate relative to each other about a hinge between an open configuration and a closed configuration. At least one arm, preferably each arm, is provided with a treatment surface in the form of a heating plate. During operation for treating a hair strand, the hair strand is introduced between the two arms in the open position, and then the two arms are manually closed on the hair strand. The hair strand is then exposed to the heat output by the heating element, and the appliance can be moved along the hair strand, until the two arms are opened and the hair strand is removed.

[0048] Advantageously, the vapor chamber, and preferably the reservoir, are incorporated into the portable processing unit of the device. In particular, the reservoir may be incorporated into its handle, and the vapor chamber may preferably be located close to the processing surface of the device so as to minimize the vapor path from the vapor chamber to the diffusion nozzle. Of course, the pumping member may also be incorporated into the handle.

[0049] Advantageously, the vapor chamber is configured to reach a temperature of 180° C. or higher.

[0050] Further objects, features, and advantages of the present invention will become apparent by reading the following description, given only as a non-limiting example, and by referring to the accompanying drawings.

Brief Description of the Drawings

[0051] [Figure 1] It is a schematic depiction in a longitudinal section of a hairbrush capable of applying vapor to hair. [Diagram 2] It is a schematic depiction in a longitudinal section of the processing portion of the hairbrush of FIG. 1, showing the vapor chamber. [Diagram 3] It is a schematic depiction of the vapor chamber according to the present application and according to the first embodiment. [Figure 4] It is a schematic depiction of the distribution of scale deposits over time in the vapor chamber of FIG. 3. [Diagram 5] It is a schematic depiction of the vapor chamber according to the present application and according to the second embodiment.

Modes for Carrying Out the Invention

[0052] FIG. 1 is a schematic depiction in a longitudinal section of a hairbrush 100 capable of discharging vapor onto hair.

[0053] Although an example is given as a hairbrush, the application may also relate to other household appliances which emit water steam, in particular domestic electric hair treatment appliances capable of emitting water steam onto the hair. Another example of an appliance is in particular a hair straightener, as described in patent application FR 2 967 018 A1.

[0054] The hairbrush 100 has a gripping handle 110 and a treatment head 120. The head 120 has a set of tines 121 arranged on a support plate 122 along a number of rows. The rows of tines 121 extend substantially along the longitudinal axis X of the brush.

[0055] In the example shown, the support plate 122 is substantially flat and has a substantially rectangular shape extending subsequent to the grip handle 122. Of course, it is conceivable to have a curved support plate, in which case the teeth 121 are preferably located on a concave surface of the support plate, or even a substantially cylindrical support plate is conceivable.

[0056] In one particular embodiment, the support plate 122 and / or the tines 121 may heat up. Preferably, only the tines 121 or only a portion of the tines 121 heat up.

[0057] The head 120 also has a number of steam outlets 130 that open onto the support plate 122. The steam outlets or nozzles 130 may be located between the teeth 121 in one or more rows, or may be distributed, particularly located along the edge of the support plate 122.

[0058] Alternatively, the steam outlet 130 may be made in the tooth 121 and in particular may open to a side of the tooth 121 .

[0059] According to the embodiment shown, the steam nozzles 130 open between the teeth 121 of the exact same row, in this case between the teeth of the middle row, thus forming a row of steam outlets 130 that extends substantially along the handle 110.

[0060] The vapor is transported from a vaporization chamber 350 integrated into the device 100 to the vapor outlet through one or more diffusion channels passing through the support plate 122 and, if applicable, the teeth 121. According to the example shown, the vaporization chamber 350 is integrated behind the support plate 122 of the head 120. Such elements are well known to those skilled in the art.

[0061] In a general manner, the evaporation chamber 350 comprises a hollow body forming an enclosure and defining a free internal volume, i.e. not occupied by filling material, in particular having no absorbent element, which can allow fluid circulation between at least one inlet for supplying liquid water to be evaporated and at least one outlet for water in the form of steam.

[0062] The volume of the vaporization chamber is preferably 20 to 100 cm 3 , or better, 30-70 cm 3 , for example, about 45 cm 3 It is.

[0063] The reservoir may have a volume of between 1 mL and 50 mL.

[0064] For this purpose, the vaporization chamber 350, in particular the part intended to come into contact with the liquid water to vaporize it, can be heated to a sufficient temperature, in particular by a heating resistance element in contact with the wall of said chamber. More particularly, the heating temperature is higher than 180° C. The heating resistance element can be shared between the vaporization chamber and the heating treatment surface of the domestic appliance, if necessary. The heating elements can also be separate, in particular so that they can be controlled independently.

[0065] The vaporization chamber 350 also comprises one or more internal walls which together form a chicane 351 between the inlet for liquid water and the outlet for water in steam form. In particular, the chicane is located near the outlet for water in steam form. Thus, preferably, the vaporization chamber has less than 50%, preferably about 25%, of its internal space provided with chicanes and more than 50%, preferably about 75%, of its internal space free of chicanes, liquid water being supplied to the areas free of chicanes.

[0066] The vapour outlet is generally in the form of one or more orifices, in particular grooves or slots made in the upper wall of the vaporisation chamber, said upper wall forming a cover for closing and sealing the vaporisation chamber.

[0067] The vaporization chamber is supplied with liquid water from a reservoir 300 by a positive displacement pump 200, for example a peristaltic or diaphragm pump. The reservoir 300 is integrated into the device constituting the hairbrush 100, in particular into its handle 110. It may advantageously be removable so as to allow easy replacement. In other cases a fill hole 301 may be provided in the wall of the handle 110. The fill hole 301 may be equipped with a valve to prevent liquid from escaping from the reservoir 300. The pump is also integrated into the handle of the device.

[0068] Preferably the device has a mass of 0.5 g.min -1 Above 5g.min -1 The vaporization chamber is configured to supply liquid water to achieve a vapor diffusion flow rate of 1 g.min. -1 Less than or equal to about 0.8 g.min. -1 It is.

[0069] In accordance with the present application, one or more inlets for supplying the liquid product lead to the interior of the vaporization chamber together with a plurality of orifices spaced apart from one another.

[0070] A first exemplary embodiment of such a vaporization chamber 400 is partially shown in FIG.

[0071] According to this embodiment, the evaporation chamber 400 is provided with an inlet for supplying liquid water in the form of a single pipe or tube 401 having an end 403 which passes through a wall 402 of the evaporation chamber 400, in this case across its width, and extends into the interior of the evaporation chamber 400, more particularly into the interior of the chicane-free area.

[0072] More specifically, this tube 401 extends over at least half, and better still over about 80%, of the distance separating the wall 402 through which it passes and the opposite wall 404 of the vaporization chamber 400. More specifically, the vaporization chamber 400 is constructed such that this separation distance substantially corresponds to its length.

[0073] According to the present application, the end portion 403 of the tube 401 for supplying liquid water has a number of orifices 405 spaced apart from one another and arranged along said end portion 403, in particular along substantially the entire length of the end portion 403 that extends into the vaporization chamber 400. The orifices 405 are regularly spaced apart. There are eight orifices.

[0074] According to a variant of the embodiment shown, the end 403 of the tube 401 forming the supply inlet has a closed distal end 406. The only opening for supplying liquid water is thus a lateral orifice 405 provided along the tube.

[0075] 4, the orifices may be arranged alternately on either side of the longitudinal axis of said end portion 403. In this way, the distribution of the liquid water flow and, consequently, of the scale formed during evaporation, is optimal.

[0076] A second exemplary embodiment of such a vaporization chamber 500 is shown in FIG.

[0077] According to this embodiment, the evaporation chamber 500 is provided with a number of inlets for supplying liquid water, preferably regularly distributed along the wall 503 of the chamber, which preferably extends in the direction of the length of said chamber 500.

[0078] The feed inlet is positioned to lead into a chicane-free region of the vaporization chamber as previously described.

[0079] Each feed inlet is in the form of a pipe or tube 501 that extends into the vaporization chamber 500 and has an open end at its end. The tube does not have an additional side orifice as in the first embodiment. As previously indicated, the open end of each tube 501 is cut lengthwise as described in WO2020127852.

[0080] Naturally, according to a variant of one embodiment, one or more of the tubes forming the supply inlets according to the second embodiment may be made in the form of a tube according to the first embodiment, provided with a plurality of lateral orifices and preferably having a closed distal end.

[0081] It should be noted that in general, the orifices for supplying liquid water to the interior of the vaporization chamber open at a distance from the inner surfaces of the body forming said vaporization chamber, these inner surfaces comprising the surface of the peripheral wall and possibly the surface of the internal chicane. In particular, each orifice opens at least 1 mm from the wall of the vaporization chamber, in particular with respect to the bottom wall and the opposite top wall. Alternatively, the distance of each orifice can reach at least 10 mm with respect to the side walls of the chamber and the internal chicane. [Explanation of symbols]

[0082] 100 Hairbrush 110 Grab handle 120 processing heads 121 teeth 122 Support Plate 130 Steam outlet 200 positive displacement pump 300 Reservoir 301 Filling hole 350 Vaporization Chamber 351 Chicane 400 Vaporization Chamber 401 Tube 402 Wall 403 End 404 Wall 405 Orifice 406 Closed distal end 500 Vaporization Chamber 501 Tube 503 Wall X Longitudinal Axis

Claims

1. A household appliance for dispersing vapor, comprising at least one reservoir (300) capable of containing a quantity of liquid product to be vaporized, separate from said reservoir and fluidly connected to at least one inlet for supplying a liquid product to a vaporization chamber (350, 400, 500) capable of supplying the liquid product contained in said reservoir via at least one pumping member (200), said appliance being capable of dispensing a liquid product having a viscosity of 0.5 g.min. －１ More than 5g.min －１ The apparatus is configured to supply liquid water to the vaporization chamber so as to obtain a vapor diffusion flow rate of 0.1 to 6 mm, the vaporization chamber having at least one outlet for the at least partially vaporized product, the outlet being fluidly connected to a vapor diffusion orifice (130) of a processing surface of the apparatus, the vaporization chamber comprising a hollow body defining a free interior space capable of allowing fluid circulation between the inlet for supplying a liquid product to be vaporized and the outlet for the at least partially vaporized product, the vapor chamber being characterized in that the one or more inlets for supplying a liquid product together have a plurality of orifices (405), the plurality of orifices (405) each having a diameter of 0.1 to 6 mm. ２ a cross section of at least one of said orifices, said free interior space being spaced apart from one another and communicating with the interior of said evaporation chamber, said free interior space having no porous material beyond a distance of at least 2 mm around said orifice for supplying liquid water so as to allow said liquid water leaving said orifice to come into direct contact with at least one evaporation surface of said chamber.

2. 2. The appliance of claim 1, wherein the inlet for supplying a liquid product to the vaporization chamber (400) is in the form of a tube (401) having an end (403), the tube extending into the vaporization chamber and having a plurality of orifices (405) spaced along the tube.

3. 3. The appliance of claim 2, wherein said orifices (405) are regularly spaced.

4. 4. The domestic appliance according to claim 2 or 3, characterized in that the orifices (405) are distributed substantially along the entire length of the end portion (403) of the tube (401) forming the supply inlet.

5. Domestic appliance according to any one of claims 2 to 4, characterized in that the end portion (403) of the tube forming the supply inlet has a closed distal end (406).

6. 6. The domestic appliance according to claim 2, characterized in that the orifices (405) are provided along at least two longitudinal axes of the tube that, between each other, form a non-zero angular sector with the central longitudinal axis of the tube.

7. 7. The appliance according to claim 6, characterized in that the orifices (405) are, at least for some of them, arranged alternately along the two longitudinal axes.

8. A household appliance according to any one of claims 1 to 7, characterized in that the vaporization chamber (500) comprises a plurality of inlets for supplying a liquid product to be vaporized, each supply inlet having at least one orifice leading into the vaporization chamber.

9. 9. The appliance of claim 8, wherein the vaporization chamber (500) comprises at least one inlet for supplying a liquid, the product to be vaporized having a single orifice leading into the vaporization chamber.

10. 10. The domestic appliance according to claim 9, characterized in that the orifice of the vaporization chamber (500) is in the form of an open distal end of the inlet for supplying a liquid product to be vaporized.

11. A household appliance according to any one of claims 1 to 10, characterized in that at least some of the orifices (405) of the vaporization chamber (400, 500) leading to the interior of the vaporization chamber, and preferably all of the orifices, open at a non-zero distance from internal surfaces of the body forming the vaporization chamber, these internal surfaces comprising the surfaces of a peripheral wall (503, 404) and possibly of an internal chicane (351).

12. Domestic appliance according to any one of the preceding claims, characterized in that the appliance is a hair styling appliance such as a straightener or a hairbrush (100).

13. Domestic appliance according to any one of claims 1 to 12, characterized in that the vapour chamber (350, 400, 500) and preferably the reservoir (300) are integrated in a portable processing unit of the appliance, in particular in its handle (110).

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