CN212661321U

CN212661321U - Steam hair dressing appliance

Info

Publication number: CN212661321U
Application number: CN201922294992.4U
Authority: CN
Inventors: 马赛厄斯·甘姆; 史蒂法纳·庞赛特; 雷吉斯·弗雷尔
Original assignee: SEB SA
Current assignee: SEB SA
Priority date: 2018-12-20
Filing date: 2019-12-19
Publication date: 2021-03-09
Anticipated expiration: 2029-12-19
Also published as: WO2020127852A1; FR3090288A1; US20220071364A1; EP3897279A1; FR3090288B1; CN111345563A

Abstract

The utility model relates to a steam haircut device for hair shaping, it has: a first jaw and a second jaw arranged opposite to each other and hinged to each other, a first treatment surface carried by the first jaw and a second treatment surface carried by the second jaw, the first and second treatment surfaces being configured to grip at least one lock of hair; a liquid container; the first and/or second jaw further has: vaporization system for vaporizing a liquid into a vapor, having at least one vaporization chamber with an inner surface communicating with a liquid container by an injection pipe having a free end, forming a liquid injection point in the vaporization chamber, a distribution system for distributing the vapor from the vaporization system, having at least one vapor distribution orifice for distributing the vapor along at least one lock of hair, characterized in that the injection pipe has a through-opening extending along the injection pipe from the free end forming the injection point, the through-opening being shaped so as to allow the liquid from the container to flow into the vaporization chamber in the event of scale deposits accumulating at the free end of the injection pipe.

Description

Steam hair dressing appliance

Technical Field

The utility model relates to the field of hairdressing appliances, in particular to the field of hairdressing appliances generating steam.

Background

Hair cutting appliances are generally composed of two jaws hinged to each other and arranged opposite each other, each having a treatment surface, wherein at least one treatment surface is heated, the other treatment surface bringing a lock of hair into contact with the heated surface. The hinged jaws generally have an appliance gripping area at the end with the hinge to enable manipulation of the appliance, in particular pivoting of the jaws to a closed position to grip a lock of hair.

In general work, a hair is shaped, for example, ironed, a lock of hair is gripped at the root of the hair, and a hairdresser is slid along the lock of hair from the root to the tip.

Different shapes of treatment surfaces may be arranged on the jaws depending on the desired hair shaping. Usually, a complementarily shaped treatment surface is used, which is flat when flat, curved when curly, and corrugated when perm.

Also, the steam can be sprayed on the hair to improve the hair styling efficiency. Document WO2014064660, for example, proposes a hairstyling appliance having a liquid container in which the jaws have a vaporizing system, and a vapor dispensing system for dispensing vapor to the locks of hair. A liquid, usually water or a hair cosmetic, is stored in a container and is injected by a tube into a vaporization system having a chamber. The liquid, which comes into contact with the vaporization chamber under the action of the heater, changes into a vapor state and reaches the dispensing system, which has a plurality of slit-shaped holes oriented to spray the vapor on the lock of hair clamped between the two treatment surfaces. However, the liquid, which may contain minerals, rises rapidly in temperature in the vaporization chamber, and may cause scale or lime to gradually deposit within the pipe or at the end of the pipe, until it becomes clogged. This phenomenon can cause malfunction of the hair clipper, shortening the life span of the hair clipper.

In addition, in order to make hairdressers more user-friendly and aesthetically pleasing, it is desirable to make hairdressers more compact, and in particular to reduce the volume of the vaporizing system. However, the reduced volume of the vaporization chamber reduces the life of the hair clipper because fouling occurs more quickly at the point of liquid injection at the end of the conduit in the vaporization chamber.

To reduce the risk of fouling of the appliance, the use of demineralized water is advocated. However, this solution is user-restrictive and not very practical, which means that the appliance still presents a risk of fouling, and technical solutions and use solutions should be sought.

Therefore, it is proposed to add a recovery device for discharging the scale accumulated in the vaporization chamber to the hair clipper. Such a device is described, for example, in document FR2987242, which proposes a collection container with a rock plate for adsorbing scale and with a scraper blade at the end of the container, which scrapes the surface of the vaporization chamber. However, such devices are complex and reduce the compactness of the hair clipper.

There is therefore a constant need for a solution which extends the life of the hair cutting appliance, eliminates dirt and is of uncomplicated construction.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to propose a solution to the problems described, in particular to extend the useful life of the hair cutting appliance, in particular to eliminate dirt, without reducing its structural compactness, in particular to maintain a low height of the vaporization chamber.

According to a first embodiment, the present invention proposes a steam hairstyling appliance for hair shaping having:

a first jaw and a second jaw arranged opposite to each other, hinged to each other, a first treatment surface carried by the first jaw and a second treatment surface carried by the second jaw, the first and second treatment surfaces being configured to grip at least a lock of hair,

a liquid container for containing a liquid to be injected,

the first and/or second jaw further has:

vaporization system for vaporizing a liquid into a vapor, having at least one vaporization chamber which communicates with a liquid container via an injection pipe, the free end of which forms a liquid injection point in the vaporization chamber,

a vapor distribution system for distributing vapor from the vaporization system, having at least one vapor distribution aperture for distributing vapor in a direction of at least one lock of hair,

characterized in that the inner surface of the vaporization chamber is at least partially covered with a hydrophobic layer, which is positioned below the injection point.

The hair clipping device proposed according to this first embodiment can have, individually or in combination, a

The following features:

-the hydrophobic layer has Polytetrafluoroethylene (PTFE);

the hydrophobic layer is positioned just below the injection point, with an area of between 10mm²And 2000mm²Preferably between 100mm²And 1000mm²More preferably between 500mm²And 600mm²E.g. 552mm²；

-the hydrophobic layer has a planar shape, preferably substantially rectangular or triangular;

or, the hydrophobic layer has a three-dimensional shape, with an inclined plane, for example with a pyramidal or truncated pyramidal shape;

the hydrophobic layer is a component embedded in the evaporation chamber, held in place by a fixing device having a positioning element for positioning the embedded component relative to the injection point, preferably a positioning half-pin formed in the evaporation chamber for cooperation with a complementary shaped recess arranged on the embedded component;

alternatively, the vaporization chamber is molded from a metallic material, wherein the hydrophobic layer is formed by applying a hydrophobic material, such as a paint or a cover layer, on the inner surface of the vaporization chamber;

the inner surface of the vaporization chamber also has a hydrophilic layer;

-the hydrophilic layer is at least partially covered with a hydrophobic layer;

the hydrophilic layer has a textile material, preferably a glass fiber textile material;

-the injection pipe is beveled at the free end forming the injection point;

-the injection tube has a semi-cut-away portion;

-the vaporization system further has an auxiliary vaporization chamber in fluid communication with the vaporization chamber, the auxiliary chamber having a plurality of flow deflectors;

-the steam distribution system has a distribution chamber, wherein at least one steam distribution hole is arranged, said distribution chamber being in steam communication with the vaporizing chamber, preferably the distribution chamber is arranged at the side of the vaporizing chamber and the auxiliary vaporizing chamber;

the vaporization system has a heater, located at least partially below the vaporization chamber, with a positive temperature coefficient of resistance or ceramic material;

the first and second treatment surfaces are substantially complementary, having a planar or curved or corrugated shape.

According to a second embodiment, the present invention proposes a steam hairstyling appliance for hair shaping having:

a liquid container for containing a liquid to be injected,

the first and/or second jaw further has:

a vaporization system for vaporizing a liquid into a vapor having at least one vaporization chamber having an inner surface communicating with a liquid container through an injection tube, a free end of the injection tube forming a liquid injection point in the vaporization chamber,

characterized in that the injection pipe has a through hole extending substantially along the injection pipe from the free end forming the injection point, the through hole being shaped to allow the liquid from the container to flow into the evaporation chamber in case of scale accumulation deposited at the free end of the injection pipe.

The hair clipping device proposed according to this second embodiment, alone or in combination, can have the following features:

the through hole has at least one aperture extending along an axis substantially parallel to the injection pipe, preferably at least two apertures extending on either side of the injection pipe, said at least two apertures forming a plane which preferably extends parallel to the inner surface of the vaporization chamber;

the through hole is a cut in a half section of the injection pipe, extending along an axis substantially parallel to the injection pipe, preferably the injection pipe is arranged in the vaporization chamber so that the cut is on the opposite side of the inner surface of the vaporization chamber;

-the injection pipe is beveled at the free end forming the injection point;

-the ratio of the height of the vaporization chamber to the inner diameter of the injection pipe is between 0.55 and 0.75;

-a hydrophilic layer extending over the inner surface of the vaporization chamber;

the hydrophilic layer extends over the entire inner surface of the vaporization chamber;

-a portion of the hydrophilic layer is arranged to partially enter into the free end of the injection pipe;

the vaporization chamber has a hydrophobic layer arranged below the injection pipe, at least at the injection point;

-the hydrophobic layer has Polytetrafluoroethylene (PTFE);

The hydrophobic layer is an embedded component, preferably a plate, embedded in the vaporization chamber, held in place by a fixing device having a positioning element for positioning the embedded component relative to the injection point;

the vaporization system also has an auxiliary vaporization chamber in fluid communication with the vaporization chamber and having a number of flow deflectors;

-the steam distribution system has a distribution chamber, wherein at least one steam distribution hole is arranged, said distribution chamber being in steam communication with the vaporisation chamber. Preferably, the distribution chamber is arranged at the side of the vaporization chamber and the auxiliary vaporization chamber;

Drawings

Other characteristics, objects and advantages of the invention will appear from the following detailed description, given as a non-limiting example with reference to the accompanying drawings, wherein:

fig. 1 is a general assembly of the hair clipper of the present invention.

Fig. 2 is a perspective view of a vaporization system according to an embodiment of the present invention.

Fig. 3 is a top view of the vaporization system according to the embodiment shown in fig. 2.

FIG. 4A is a cross-sectional view along axis A-A of the vaporization system of FIG. 3 according to the first embodiment of the vaporization chamber.

FIG. 4B is a cross-sectional view along axis B-B of the vaporization system of FIG. 3 according to the embodiment of the vaporization chamber of FIG. 4A.

FIG. 5 is a cross-sectional view along axis A-A of the vaporization system of FIG. 3 according to a second embodiment of the vaporization chamber.

Fig. 6A is a cross-sectional view of the vaporization system at a first instant in time, according to the embodiment shown in fig. 5.

Fig. 6B is a cross-sectional view of the vaporization system of fig. 5 at a second instant that is subsequent to the first instant shown in fig. 6A.

FIG. 7 is a cross-sectional view along axis A-A of the vaporization system of FIG. 3 according to a fourth embodiment of the vaporization chamber.

Fig. 8A is a cross-sectional view of the vaporization system of the embodiment of fig. 7 at a first instant in time.

Fig. 8B is a cross-sectional view of the vaporization system of the embodiment of fig. 7 at a second instant in time after the first instant in time shown in fig. 8A.

Detailed Description

Fig. 1 is a perspective exploded view of a steam hairstyling appliance for hair styling. As mentioned previously, the steam hairdresser 1 generally has a first jaw 2 and a second jaw 3, which are arranged opposite each other and hinged to each other by a hinged hinge 20. The maximum opening angle a (not shown) between the first and second jaws is 5 to 60, preferably 10 to 20, more preferably about 15.

A first treated surface is carried by the first jaw 2 and a second treated surface 4 is carried by the second jaw 3, the first and second surfaces being for gripping a lock of hair.

The first and second treated surfaces 4 are generally complementary surfaces. Which can have different shapes, preferably replaceable, according to the desired use of the hair cutting appliance 1. Typically, the treatment surface is flat when the hair appliance 1 is used as an ironing appliance, or curved (not shown) when used as a curling appliance (not shown), or corrugated (not shown) when used as a curling appliance. Hair curling appliances are described, for example, in document EP 0619087. The treatment surface may also be uneven, i.e. have a number of protrusions such as teeth (not shown).

Steam hairdressers also have a liquid container, which is usually a water container (not shown in fig. 1), or a container containing a hair dressing, which can be housed in one of the jaws or arranged in an offset base at a distance from the appliance, as is designed in document EP 3025610.

As shown in fig. 2 and 3, the liquid container is in fluid communication with the liquid vaporization system 7 by an injection tube 74. Advantageously, the liquid container is located in a jaw with a liquid vaporization system 7.

The vaporization system 7 has at least one vaporization chamber 71, referred to as the first vaporization chamber or main vaporization chamber, occupying a certain first volume, i.e. an uninterrupted or unobstructed volume. The particular volume may be substantially parallelepiped shaped, for example having a rectangular, square or trapezoidal cross-section. This gives a good compromise between compactness and efficiency of the vaporization system. The inner surface of the vaporization chamber 71 is referred to as a lower wall of the vaporization chamber 71, i.e., a surface of a wall forming a bottom of the vaporization chamber 71. Thus, fluid is preferentially delivered to the interior surface by the injection tube 74, turning into steam.

The free end of the injection pipe 74 forms an injection point in the main vaporisation chamber 71. Preferably, an injection pipe protrudes inside the vaporization chamber 71, and the liquid in the container can be injected into the main vaporization chamber 71 at this injection point. Thus, the injection pipe 74 is different from, i.e., not the same as, the vaporization chamber 71. Typically, the liquid in the container is water, or alternatively, a hair cosmetic.

The hairstyling appliance also has a steam distribution system 7', which communicates with the vaporizing system 7 and has one or more steam distribution holes 75 for distributing steam in the direction of the lock of hair.

The distribution system 7' has, for example, a distribution chamber 76 which is in vapor communication with the vaporization chamber 71, wherein at least one vapor distribution hole 75 is arranged. The distribution chamber 76 may extend at the side of the vaporizing system 7, preferably substantially over the entire length of the vaporizing system 7. This allows for a compact and efficient structure of the vaporization system 7 and the distribution system 7'.

Preferably, the vaporization chamber 71 is a compartment heated by a heater 8, for example the heater 8 is arranged in contact with the vaporization chamber 71 to vaporize liquid injected into the vaporization chamber 71, which is not subject to the heating limitations of other components of the hair piece.

The heater 8 may be positioned, for example, below the vaporization system 7, as shown in the exploded view of FIG. 1.

The heater 8 can be arranged on a larger outer surface of the gasification system 7, preferably opposite the distribution hole 75, and at least partially abutting against a side surface of the gasification system 7.

Generally, the vaporization is performed in a vaporization system 7 and a vapor distribution system 7'.

Preferably, the maximum external volume of the vaporization system 7 is 110x35x12.5 mm and the internal volume is sufficient to store at least 35 liters of scale in hard water having a hardness of 28 ° f. The heater 8 is used, for example, to vaporize water in a sequence of 10 consecutive 10 seconds off for a flow rate of about 1 gram/minute ± 0.5 gram/minute.

The vaporization system 7 may be constructed of a metal, an alloy, or any heat transfer material. Typically, the vaporization system 7 is made of aluminum and may be molded or press formed.

The vaporization system 7 may have a plurality of parts, in particular at least one cover. According to the exploded view shown in fig. 1, the vaporizing system 7 has a first part with a vaporizing chamber 71, which rests against the heater 8, on which a second part, here a lid, is arranged with holes, which are connected to steam distribution holes 75. Preferably, these different parts are sealed, for example by silicone sealing rings.

Advantageously, the reed can be pressed against the heater 8 by the vaporization system 7 to ensure permanent contact and optimum operation.

The heater 8 may be generally a positive temperature coefficient resistor or a ceramic material, but is generally any system that can heat the vaporization chamber 71 for the desired purpose.

In other embodiments, the heater 8 may have two heating elements arranged laterally on each side of the vaporization system 7. Advantageously, one of the two heating elements is applied between the outer surface of the vaporization chamber 71 and the outer surface of the vapor distribution system 7 'in order to heat the vaporization system 7 and the distribution system 7' simultaneously over a small volume.

The heater 8 can be regulated by a thermistor, for example with a negative temperature coefficient, which works as a temperature sensor, preferably arranged above the injection point. The thermistor makes it possible to make the hairdresser cutting apparatus 1 safer, stopping the liquid injection under special conditions, for example depending on the temperature of the heater 8. Typically, the lower temperature limit is about 95 ℃ and the upper temperature limit is 130 ℃, or according to a small temperature range, the lower temperature limit is 105 ℃ and the upper temperature limit is 120 ℃ or even 110 ℃.

Advantageously, the injection pipe 74 is arranged substantially centrally in the vaporization chamber 71. The end of the injection pipe 74 forming the injection point is arranged substantially over a quarter of the length of the vaporization chamber 71. In practice, the injection point should be arranged in the area of the vaporization chamber 71 that regulates the maximum temperature, leaving the inner wall of the vaporization chamber 71, to increase the vaporization efficiency of the injected liquid. Should also leave the injection point of the steam distribution device 7' to limit the risk of hot water spurting that has not yet vaporized.

Preferably, the outer wall of the injection pipe 74 is at least 1 mm from the inner wall of the vaporization chamber 71, the height of which is greater than 8 mm, in order to limit the deposition of scale on the free end of the injection pipe 74, and thus premature clogging.

The material of the injection tube 74 may be provided with or coated with a material to which scale is less adherent to limit scale deposition. In general, the material chosen may be polytetrafluoroethylene (PTFE, known under the trade name teflon), which has the advantage of having excellent resistance to adsorption, while being very heat-resistant. Preferably, at least the inner wall of the injection pipe 74 is coated with polytetrafluoroethylene, so that the injection pipe 74 is resistant to high temperatures, in particular temperatures above 300 ℃, and the inner wall has a very low friction coefficient, thereby limiting the deposition of scale on the inner wall of the injection pipe 74.

The fill tube 74 preferably has a large internal cross-section to avoid premature plugging of the free end of the fill tube 74, for example. The diameter of the inner section is typically greater than 3 mm. Preferably greater than 4 mm. In order to limit heat transfer from the walls of the vaporization chamber 71 to the liquid, the wall thickness of the injection tube 74 is preferably greater than 1 mm. Polyphenylene Sulfide (PPS) rings with an inner cross-section of 6 mm and an outer cross-section of 7 mm may be attached to the injection tube 74 to limit heat transfer to the inner wall of the injection tube 74.

Preferably, the ratio of the height of the vaporization chamber 71 to the diameter of the inner cross-section of the injection tube 74 is between 0.55 and 0.75, typically up to about 0.6 for a height of 4.9 mm and an inner diameter of mm. In fact, these dimensions have been optimized in order to ensure a greater resistance to dirt, while simultaneously taking into account the dimensions of the different components.

Advantageously, the portion forming the free end of the injection pipe 74 can have a particular shape, concentrating the scale that may accumulate in a specific area, while providing an area where the liquid can continue to enter the evaporation chamber 71 without being affected by the accumulation of scale.

For example, the injection tube 74 is beveled at the free end forming the injection point, as shown in FIG. 4A.

In other embodiments, or in addition, the injection tube 74 may have a through hole extending along the injection tube substantially from the free end forming the injection point. The shape of the through-hole allows the liquid from the container to flow into the evaporation chamber 71 even in the event of scale accumulation and deposition at the free end of the injection pipe 74.

In one embodiment, the through-hole of the fill tube 74 is a cut-out in a half-section of the fill tube 74 that extends along an axis that is substantially parallel to the fill tube 74. In the embodiment shown in fig. 2 to 5, the injection pipe 74 is arranged in the vaporization chamber 71 with the cut portions on opposite sides of the wall forming the bottom of the vaporization chamber 71. Generally, in embodiments in which the vaporisation chamber 71 is closed by a plate forming a lid, this means that the cut portion of the tube 74 is thus directed towards the plate forming the lid.

In the embodiment shown in fig. 7, the through-hole of the filler pipe 74 has at least one slit extending along an axis substantially parallel to the filler pipe 74. Preferably, the through hole may have two slits extending on both sides of the injection pipe 74.

According to a preferred non-limiting embodiment, the inner surface of the vaporization chamber 71 is at least partially covered with a hydrophobic layer 9, which is positioned below the injection point. The hydrophobic layer 9 does not evaporate below the injection point but pushes the liquid to evaporate in the evaporation chamber 71 so that the deposited scale is not stored below the injection point. In fact, the hydrophobic layer 9 is characterized by a high surface tension.

Advantageously, the hydrophobic layer 9 is of Polytetrafluoroethylene (PTFE). In fact, teflon is a material resistant to high temperatures (in particular above 300 ℃) and has a very low friction coefficient, limiting the deposition of scale at the injection point, since water cannot stay there.

According to one embodiment the hydrophobic layer 9 is positioned only below the injection point. This means that only the surface below the injection point is covered with the hydrophobic layer 9, and therefore it does not cover the entire inner surface of the vaporization chamber 71. In particular, the hydrophobic layer 9 may cover a surface of between 10mm²And 2000mm²Preferably between 100mm²And 1000mm²More preferably between 500mm²And 600mm²In the meantime. Typically, the hydrophobic layer 9 may cover the inner surface forming the bottom of the vaporization chamber 71, the covered surface being about 552mm²。

The hydrophobic layer 9 may have a planar shape, preferably substantially rectangular or triangular. It may also take a three-dimensional shape, for example defined by an inclined plane, to improve the gliding efficiency of the liquid away from the vaporization point at the free end of the injection pipe 74. This three-dimensional shape may also help to distribute the liquid well as reaching the vaporization chamber, removing large droplets so that they are distributed as smaller droplets across the entire inner surface of the vaporization chamber 71. Thus, the efficiency of vaporization is increased while reducing the risk of fouling (clogging) of the appliance. In embodiments where the hydrophobic layer 9 has a three-dimensional shape, the shape of the hydrophobic layer 9 may also be made during the manufacturing of the vaporization chamber 71, typically being shaped in a mold.

In the embodiment shown in fig. 4A and 4B, the hydrophobic layer 9 has, for example, a pyramidal shape. Alternatively, the hydrophobic layer 9 may have a truncated cone shape.

In one embodiment, the hydrophobic layer 9 may be formed by applying a hydrophobic material on the inner surface of the vaporization chamber 71. Typically, the hydrophobic material may be applied as a coating or blanket or a steaming treatment on the inner surface of the vaporization chamber 71.

Advantageously, the water-repellent layer 9 is a member embedded in the vaporization chamber 71. The installation member is held in place in the vaporization chamber 71 by a fixing device having a positioning element 710 for positioning the installation member relative to the injection point.

In the embodiment of the evaporation chamber 71 shown in fig. 2 and 3, the positioning member 710 has a positioning half-pin 710a formed in the evaporation chamber 71 for cooperation with a complementary shaped recess 9a arranged in the insert member 9.

In other embodiments, or in addition, the inner surface of the vaporization chamber 71 has a hydrophilic layer, i.e. a layer characterized by a low surface tension. The hydrophilic layer 10 extends over the whole or part of the inner surface of the vaporization chamber 71.

The hydrophilic layer 10 may be positioned only below the injection point in the sense that only the surface below the injection point is covered with the hydrophilic layer 10. Preferably, the hydrophilic layer 10 extends over the entire inner surface of the vaporization chamber 71 to maximize the diffusion of the liquid.

Preferably, the hydrophilic layer 10 has a fabric material, such as a glass fiber fabric, which can significantly limit the ballooning phenomenon.

According to a particular embodiment, which is shown in particular in fig. 4A and 4B, the vaporization chamber 71 has a hydrophilic layer 10, which is at least partially covered by a hydrophobic layer 9. In this embodiment, the liquid injected at the injection point drops in drops on the water-repellent layer 9, and the spherical shape is maintained due to the high surface tension of the water-repellent material constituting the water-repellent layer 9, and therefore, such a sphere slides toward the hydrophilic layer 10, keeping a certain distance from the injection point. The hydrophilic layer 10 has a low surface tension and the water droplets can be immediately vaporized. This reduces the occurrence of scale, in any case, away from the point of injection, if necessary.

Advantageously, but in non-limiting manner, as shown in particular in fig. 2 and 3, the liquid vaporization system 7 may also have a second vaporization chamber, or auxiliary vaporization chamber 72, in fluid communication with the first vaporization chamber 71, occupying a second, different volume. Thus, the first vaporizing chamber 71 is arranged upstream of the second vaporizing chamber 72 in the steam passing direction.

In this embodiment, the liquid injected into the vaporization chamber 71 is converted into vapor, which is carried out in at least two

different vaporization chambers

71, 72. This effectively maintains unwanted scale and improves the anti-lime efficiency of the hair clipper 1, thereby prolonging the time of use.

Preferably, the second or auxiliary vaporization chamber 72 has a discontinuity or obstruction due to the presence of the deflector 73, forming a labyrinth-like passage for the steam.

By baffle 73 is meant any obstacle arranged in the chamber, which for example forms a meandering movement of the steam, reducing the passage speed in the auxiliary vaporizing chamber 72, increasing the contact with the surface of the different walls of the chamber 72. This may vaporize liquid droplets that may be present, thereby ensuring that the liquid is fully vaporized and that the heat exchange surface is increased due to the presence of the flow deflector 73. The guide vanes 73 may for example be distributed parallel to each other. This allows the steam to pass along a regular geometry, thereby trapping scale evenly in the second vaporisation chamber 72.

Preferably, the first volume occupied by the first vaporization chamber 71 is greater than, even at least twice as great as, the second volume occupied by the second vaporization chamber 72, so as to vaporize rapidly in the first volume without reducing the compactness of the vaporization system 7.

In this embodiment, the distribution chamber 76 may be arranged at the side of the vaporization chamber 71 and the auxiliary vaporization chamber 72, preferably, substantially over the entire length of the vaporization system 7.

Such a corresponding arrangement and operation is described in detail in document EP 2591698.

A particular embodiment of the vaporization system 7, schematically illustrated in operation, is given by figures 6A, 6B and 8A, 8B, illustrating the advantages obtained by the aforementioned features.

In the first embodiment shown in fig. 6A and 6B, the injection pipe 74 has a through hole having a cut portion in a half section, and the inner surface of the vaporization chamber 71 is covered with the hydrophobic layer 9 covering the whole or part of the inner surface of the vaporization chamber 71. In operation, as shown in fig. 6A, at a first instant T1, typically when hair clipper 1 is first used, liquid from the container is injected into vaporization chamber 71 by injection tube 74 at the free end forming initial injection point 11.

The injected water is brought into contact with the hydrophobic layer 9 at a vaporization point remote from the initial injection point 11, and is vaporized by a rapid increase in temperature. The injected liquid water may contain minerals, lime or scale which gradually accumulate at the end forming the initial injection point 11. Scale may gradually deposit within the injection tube until the end plugs.

As shown in fig. 6B, at a moment T2 subsequent to the moment T1, for example, after hard water of 10 liters or more, which has a hardness of usually 28 ° f, is injected into the vaporization chamber 71, the end of the injection pipe 74 is clogged with the scale clogging 12. Thus, the water flows into the vaporization chamber 71 at a further injection point 11' located upstream of the injection pipe 74 with respect to the initial injection point 11. The water may flow on both sides of the injection pipe 74, or on the upper side of the scale plug 12.

In this embodiment, the injection point 11' gradually deviates along the cut portion of the injection tube 74 throughout the use of the hair cutting appliance 1, depending on the scale accumulation. In other words, the time at which the injection point is blocked by the scale is significantly delayed because the water is not injected until the entire length of the cut portion of the injection pipe 74 is blocked by the scale. Thus, the soil resistance of the appliance is significantly improved.

In a second embodiment, shown in fig. 8A and 8B, the injection pipe 74 has a through hole with a slit at the free end, and the inner surface of the vaporization chamber 71 is covered with a hydrophobic layer 9 covering the whole or part of the inner surface of the vaporization chamber 71. In operation, as shown in fig. 8A, at a first instant T1', normally when the hairstyling apparatus 1 is first used, liquid from the container is injected into the vaporisation chamber 71 by the injection tube 74 at the free end forming the initial injection point 11.

As in the previous embodiment, the injected water is in contact with the hydrophobic layer 9 at a vaporization point remote from the initial injection point 11, and is vaporized by a rapid increase in temperature. The injected liquid water may contain minerals and lime accumulates gradually at the end forming the initial injection point 10. Scale may gradually deposit within the injection tube 74 until the end plugs.

As shown in fig. 8B, at a moment T2 'subsequent to the moment T1', for example, after hard water of 10 liters or more, typically 28 ° f, is injected into the vaporization chamber 71, the end of the injection pipe 74 is clogged with the scale clogging 12. Thus, the water flows into the vaporization chamber 71 at another injection point 11' located upstream of the injection pipe with respect to the initial injection point 11. In the special case of a through hole having two slits on both sides of the injection pipe 74, water may flow at the injection point on both sides of the injection pipe 74.

As in the previous embodiment, the injection point 11' gradually deviates along the slit throughout the use of the hair appliance 1, depending on the scale accumulation. In other words, the time at which the injection point is blocked by the scale is significantly delayed because the water is not injected until the entire length of the cut portion of the injection pipe 74 is blocked by the scale. Thus, the soil resistance of the appliance is significantly improved.

Thus, the addition of a through hole in the injection tube 74, and/or the placement of a hydrophobic layer 9 at the point of injection, provides the device 1 with improved resistance to fouling and an extended life of the device 1.

The reader should understand that many modifications may be made without materially departing from the novel teachings and advantages described herein. All such modifications are therefore within the scope of the proposed hair cutting appliance.

Claims

1. Steam haircutting appliance (1) for hair shaping, having:

-a first jaw (2) and a second jaw (3) arranged opposite to each other and hinged to each other, the first jaw (2) having a first treatment surface (4), the second jaw (3) having a second treatment surface, the first and second treatment surfaces being configured to grip at least one lock of hair,

-a liquid container for containing a liquid,

the first and/or second jaw (2,3) further comprises:

-a vaporizing system (7) for vaporizing the liquid into a vapor having at least one vaporizing chamber (71) with an inner surface communicating with the liquid container by an injection pipe (74), the injection pipe (74) having a free end forming a liquid injection point in the vaporizing chamber (71),

-a distribution system (7') for distributing the steam coming from the vaporizing system (7) and having at least one steam distribution hole (75) for distributing the steam along at least one lock of hair,

characterized in that the injection pipe (74) has a through hole extending along the injection pipe (74) from the free end forming the injection point, the through hole being shaped so as to allow the liquid from the container to flow into the evaporation chamber (71) in the event of scale accumulating and depositing at the free end of the injection pipe (74).

2. Steam haircutting appliance (1) according to claim 1, characterized in that the through hole has at least one aperture extending along an axis parallel to the injection duct (74).

3. Steam haircutting appliance (1) according to claim 2, characterized in that the through hole has at least two slits extending on either side of the filling pipe (74), said at least two slits forming a plane which extends parallel to the inner surface of the vaporisation chamber (71).

4. Steam hairclipper (1) as in claim 1, characterized in that the through hole is a cut on a half section of the injection duct (74), extending along an axis parallel to the injection duct (74).

5. Steam hairdresser (1) according to claim 4, characterized in that the filling pipe (74) is arranged in the vaporisation chamber (71) so that the cutting portions are located on opposite sides of the inner surface of the vaporisation chamber (71).

6. Steam hairclipper (1) as claimed in one of the claims 1 to 5, characterized in that the injection pipe (74) is beveled at the free end forming the injection point.

7. Steam hairdresser (1) according to any one of claims 1 to 5, wherein the ratio of the height of the vaporisation chamber (71) to the internal diameter of the injection duct (74) is between 0.55 and 0.75.

8. Steam hairdresser (1) according to any one of claims 1 to 5, wherein the hydrophilic layer (10) extends on the inner surface of the vaporisation chamber (71).

9. Steam haircutting appliance (1) according to claim 8, characterized in that the hydrophilic layer (10) extends over the entire inner surface of the evaporation chamber (71).

10. Steam haircutting appliance (1) according to claim 8, characterized in that the hydrophilic layer (10) comprises a textile material.

11. Steam hairdresser (1) according to claim 10, characterized in that said fabric material is a glass fabric.

12. Steam haircutting appliance (1) according to claim 8, characterized in that a portion of the hydrophilic layer (10) is arranged to partially enter the free end of the filling pipe (74).

13. Steam hairdresser (1) according to any one of claims 1-5, wherein the evaporation chamber (71) has a hydrophobic layer (9) arranged below the injection pipe (74), at least at the injection point.

14. Steam hairdresser (1) according to claim 13, wherein the hydrophobic layer (9) comprises Polytetrafluoroethylene (PTFE).

15. Steam hairdresser (1) according to claim 13, characterized in that the hydrophobic layer (9) is positioned only below the injection point, with an area of between 10mm²And 2000mm²In the meantime.

16. Steam haircutting appliance (1) according to claim 15, characterized in that said area is 552mm²。

17. Steam hairdresser (1) according to claim 13, characterized in that the hydrophobic layer (9) is an embedded component embedded in the evaporation chamber (71) and held in place by a fixing device having a positioning element (710) for positioning the embedded component relative to the injection point.

18. Steam haircutting appliance (1) according to claim 17, characterized in that said embedded member is a plate.

19. Steam hairdresser (1) according to any one of claims 1-5, wherein the vaporizing system further has an auxiliary vaporizing chamber (72) in fluid communication with the vaporizing chamber (71) and comprising a plurality of flow deflectors (73).

20. Steam haircutting appliance (1) according to any one of claims 1 to 5, characterized in that the steam distribution system (7') has a distribution chamber (76), wherein at least one steam distribution hole (75) is arranged, said distribution chamber (76) being in steam communication with the evaporation chamber (71).

21. Steam haircutting appliance (1) according to claim 19, characterized in that the steam distribution system (7') has a distribution chamber (76), wherein at least one steam distribution hole (75) is arranged, said distribution chamber (76) being in steam communication with the vaporizing chamber (71), and the distribution chamber (76) being arranged at the side of the vaporizing chamber (71) and the auxiliary vaporizing chamber (72).