Steam hair cutting appliance

Abstract

The present invention relates to a steam hair clipper (1) for hair styling, comprising: a first jaw (2) and a second jaw (3) arranged opposite to and hinged to each other, a first processing surface (4) supported by the first jaw (2) and a second processing surface (4) supported by the second jaw (3), the first and second processing surfaces being configured to clamp at least one strand of hair; a liquid container; the first and / or second jaws (2, 3) further comprising: a vaporization system (7) for vaporizing the liquid into steam, comprising at least one vaporization chamber (71) having an inner surface and communicating with the liquid container via an injection pipe (74) having a free end forming a liquid injection point in the vaporization chamber (71); and a distribution system (7') for distributing steam from the vaporization system (7) having at least one steam distribution hole (75) for distributing steam along at least one strand of hair, characterized in that the inner surface of the vaporization chamber (71) is at least partially covered with a hydrophobic layer (9) positioned below the injection point.

Description

Technical Field

[0001] This invention relates to the field of hairdressing appliances, and particularly to the field of hairdressing appliances that generate steam. Background Technology

[0002] Hairdressing tools generally consist of two jaws hinged together and arranged opposite each other, each having a processing surface, at least one of which is heated, and the other processing surface brings a strand of hair into contact with the heated surface. The hinged jaws generally have a gripping area at the hinged end to allow manipulation of the tool, particularly to pivot the jaws toward a closed position to clamp the strand of hair.

[0003] In general, the hair is styled, for example, by perming it. The hair is clamped at the roots and the hair clippers are then slid along the hair from the roots to the ends.

[0004] Different shaped treatment surfaces can be arranged on the jawline to suit the desired hair style. Typically, complementary shapes are used; the treatment surfaces are flat when flattening, curved when curling, and wavy when perming.

[0005] Steam can also be sprayed directly onto the hair, improving hair styling efficiency. For example, document WO2014064660 proposes a hair-cutting appliance with a liquid container, where the jaws have a vaporization system, and a steam distribution system for distributing steam to the hair strands. The liquid, typically water or hair styling product, is stored in the container and injected through a pipe into the vaporization system, which has a chamber. Under the action of a heater, the liquid comes into contact with the vaporization chamber, turning into steam, and reaches the distribution system, which has numerous slit-like holes oriented to spray steam onto the hair strands sandwiched between two treatment surfaces. However, the liquid, which may contain minerals, heats up rapidly in the vaporization chamber, potentially causing scale or limescale to gradually deposit inside or at the ends of the pipes, eventually clogging them. This phenomenon can cause the hair-cutting appliance to malfunction, shortening its lifespan.

[0006] Furthermore, to make hairdressing tools more user-friendly and aesthetically pleasing, their structure should be more compact, especially by reducing the volume of the vaporization system. However, a smaller vaporization chamber volume will shorten the lifespan of the hairdressing tools because dirt will accumulate more quickly at the liquid injection point at the end of the pipe within the vaporization chamber.

[0007] To reduce the risk of appliance fouling, the use of softened water is encouraged. However, this solution is restrictive for users and is rarely adopted in practice, meaning that the risk of appliance fouling still exists. Therefore, technical and practical solutions should be sought.

[0008] Therefore, it has been proposed to add a recovery device to hairdressing appliances to drain and recover scale accumulated in the vaporization chamber. Such a device is described, for example, in document FR2987242, which proposes a collection container with rock flakes for adsorbing scale and a scraper at the end of the container for scraping the surface of the vaporization chamber. However, this device is complex and reduces the structural compactness of the hairdressing appliance.

[0009] Therefore, there is always a need for a solution that extends the lifespan of hairdressing tools, resists dirt, and avoids complicating their structure. Summary of the Invention

[0010] The purpose of this invention is to provide a solution to the aforementioned problems, particularly to extend the service life of hairdressing appliances, especially to resist dirt accumulation, without reducing their structural compactness, and especially to maintain a low height of the vaporization chamber.

[0011] According to a first embodiment, the present invention provides a steam hair-shaping device for hair styling, comprising:

[0012] A first jaw plate and a second jaw plate are arranged opposite to and hinged to each other. A first processing surface is supported by the first jaw plate, and a second processing surface is supported by the second jaw plate. The first and second processing surfaces are configured to clamp at least one strand of hair.

[0013] Liquid containers,

[0014] The first and / or second jaw plates also include:

[0015] A vaporization system for vaporizing a liquid into vapor includes at least one vaporization chamber having an inner surface and communicating with a liquid container via an injection pipe, the free end of which forms a liquid injection point within the vaporization chamber.

[0016] A steam distribution system for distributing steam from a vaporization system, comprising at least one steam distribution orifice for distributing steam along the direction of at least one strand of hair.

[0017] The feature is that the inner surface of the vaporization chamber is at least partially covered with a hydrophobic layer, which is positioned below the injection point.

[0018] In other words, according to the invention, the inner surface of the vaporization chamber is at least partially covered with a hydrophobic layer, i.e., a layer that does not or minimally wet the liquid, said layer being positioned at least below the injection point, which is formed by the free end of the injection tube. The hydrophobic layer, positioned below the injection point, prevents the liquid from vaporizing at that location, instead pushing it further away. Therefore, no vaporization occurs at the injection point, preventing the formation of scale or solid deposits. This avoids any blockage at the injection point (of the injection tube), thus preventing premature failure of the appliance, thereby extending its service life and improving its safety and reliability.

[0019] The hairdressing appliance according to the first embodiment may have the following features, either alone or in combination:

[0020] - The hydrophobic layer includes polytetrafluoroethylene (PTFE);

[0021] - The hydrophobic layer is positioned only below the injection point, and the positioning area is between 10 mm. 2 and 2000mm 2 Between, preferably between 100mm 2 and 1000mm 2 Between, more preferably between 500mm 2 and 600mm 2 Between, for example, 552mm 2 ;

[0022] - The hydrophobic layer has a planar shape, preferably substantially rectangular or triangular;

[0023] - Alternatively, the hydrophobic layer has a three-dimensional shape with an inclined plane, such as a cone or truncated cone shape;

[0024] - The hydrophobic layer is a component embedded in the vaporization chamber and held in place by a fixing device, the fixing device including a positioning element for positioning the embedded component relative to the injection point, preferably having a positioning half-pin formed in the vaporization chamber and a groove of complementary shape arranged in the embedded component.

[0025] - Alternatively, the vaporization chamber is molded from a metal material, wherein the hydrophobic layer is formed by applying a hydrophobic material, such as a coating or a cover, to the inner surface of the vaporization chamber;

[0026] - The inner surface of the vaporization chamber also has a hydrophilic layer;

[0027] - The hydrophilic layer is at least partially covered by the hydrophobic layer;

[0028] - The hydrophilic layer has a fabric material, preferably a glass fiber fabric material;

[0029] -The injection tube has a bevel at the free end where the injection point is formed;

[0030] -The injection tube has a semi-cut section;

[0031] - The vaporization system also has an auxiliary vaporization chamber, which is in fluid communication with the vaporization chamber, and the auxiliary chamber has several guide vanes;

[0032] - The steam distribution system has a distribution chamber in which at least one steam distribution hole is arranged, the distribution chamber being in steam communication with the vaporization chamber, preferably, the distribution chamber is arranged on the side of the vaporization chamber and the auxiliary vaporization chamber;

[0033] - The vaporization system has a heater, which is at least partially located below the vaporization chamber, and has a positive temperature coefficient resistor or ceramic material;

[0034] - The first and second processed surfaces are substantially complementary and have planar, curved, or corrugated shapes.

[0035] According to a second embodiment, the present invention provides a steam hair-shaping device for hair styling, comprising:

[0036] A first jaw plate and a second jaw plate are arranged opposite to and hinged to each other. A first processing surface is supported by the first jaw plate, and a second processing surface is supported by the second jaw plate. The first and second processing surfaces are configured to clamp at least one strand of hair.

[0037] Liquid containers,

[0038] The first and / or second jaw plates also include:

[0039] A vaporization system for vaporizing a liquid into vapor includes at least one vaporization chamber having an inner surface and communicating with a liquid container via an injection pipe, the free end of which forms a liquid injection point within the vaporization chamber.

[0040] A steam distribution system for distributing steam from a vaporization system, comprising at least one steam distribution orifice for distributing steam along the direction of at least one strand of hair.

[0041] The feature is that the injection tube has a through hole that extends substantially along the injection tube from the free end where the injection point is formed. In the event of scale buildup at the free end of the injection tube, the shape of the through hole allows liquid from the container to flow into the vaporization chamber.

[0042] The hairdressing appliance according to the second embodiment may have the following features, either alone or in combination:

[0043] - The through-hole has at least one slit that extends along a line substantially parallel to the axis of the injection tube, preferably having two slits that extend on both sides of the injection tube, the at least two slits forming a plane that preferably extends parallel to the inner surface.

[0044] - The through hole is a cut portion on half of the cross-section of the injection tube, extending along an axis substantially parallel to the injection tube. Preferably, the injection tube is arranged in the vaporization chamber such that the cut portion is located on opposite sides of the inner surface of the vaporization chamber.

[0045] -The injection tube has a bevel at the free end where the injection point is formed;

[0046] - The ratio of the height of the vaporization chamber to the inner diameter of the injection pipe is 0.55 to 0.75;

[0047] - The hydrophilic layer extends on the inner surface of the vaporization chamber;

[0048] - The hydrophilic layer extends across the entire inner surface of the vaporization chamber;

[0049] - The hydrophilic layer has a fabric material, preferably a glass fiber fabric material;

[0050] - A portion of the hydrophilic layer is arranged to partially enter the free end of the injection tube;

[0051] - The vaporization chamber has a hydrophobic layer, which is arranged below the injection pipe, at least at the injection point;

[0052] - The hydrophobic layer is made of polytetrafluoroethylene (PTFE);

[0053] - The hydrophobic layer is positioned only below the injection point, with a positioning area of ​​approximately 10 mm. 2 and 2000mm 2 Between, preferably between 100mm 2 and 1000mm 2 Between, more preferably between 500mm 2 and 600mm 2 Between, for example, 552mm 2 ;

[0054] - The hydrophobic layer is a component, preferably a plate, embedded in the vaporization chamber and held in place by a fixing device having a positioning element for positioning the embedded component relative to the injection point;

[0055] - The vaporization system also has an auxiliary vaporization chamber, which is in fluid communication with the vaporization chamber and has several guide vanes;

[0056] - The steam distribution system has a distribution chamber with at least one steam distribution port arranged therein, the distribution chamber being in steam communication with the vaporization chamber. Preferably, the distribution chamber is arranged on the side of the vaporization chamber and the auxiliary vaporization chamber;

[0057] - The vaporization system has a heater, which is at least partially located below the vaporization chamber, and has a positive temperature coefficient resistor or ceramic material;

[0058] - The first and second processed surfaces are substantially complementary and have planar, curved, or corrugated shapes. Attached Figure Description

[0059] Other features, objects, and advantages of the invention will become apparent from the following detailed description, taken with reference to the accompanying drawings as non-limiting embodiments, in which:

[0060] Figure 1 is an assembly drawing of the hairdressing appliance of the present invention.

[0061] Figure 2 This is a perspective view of a vaporization system according to an embodiment of the present invention.

[0062] Figure 3 It is based on Figure 2 A top view of the vaporization system of the embodiment shown.

[0063] Figure 4A This is based on the first embodiment of the vaporization chamber. Figure 3 The vaporization system shown is a cross-sectional view along axis AA.

[0064] Figure 4B It is based on Figure 4A The embodiment of the vaporization chamber shown Figure 3 The vaporization system shown is a cross-sectional view along axis BB.

[0065] Figure 5 This is based on the second embodiment of the vaporization chamber. Figure 3 The vaporization system shown is a cross-sectional view along axis AA.

[0066] Figure 6A It is based on Figure 5 A cross-sectional view of the vaporization system of the illustrated embodiment at the first instant.

[0067] Figure 6B It is based on Figure 5 The vaporization system of the illustrated embodiment continues Figure 6A The cross-sectional view shown is taken at the second instant after the first instant.

[0068] Figure 7 This is based on the fourth embodiment of the vaporization chamber. Figure 3 The vaporization system shown is a cross-sectional view along axis AA.

[0069] Figure 8A It is based on Figure 7 A cross-sectional view of the vaporization system of the illustrated embodiment at the first instant. Figure 8B It is based on Figure 7 The vaporization system of the illustrated embodiment is in a continuous state Figure 8A The cross-sectional view shown is taken at the second instant after the first instant. Detailed Implementation

[0070] Figure 1 This is an exploded perspective view of a steam hair clipper for hair styling. As previously described, the steam hair clipper 1 generally includes a first jaw 2 and a second jaw 3, which are arranged opposite to and hinged to each other by a hinged joint 20. The maximum opening angle α (not shown) between the first and second jaws is 5° to 60°, preferably 10° to 20°, and more preferably about 15°.

[0071] The first processing surface is supported by the first jaw plate 2, and the second processing surface 4 is supported by the second jaw plate 3. The first and second surfaces are used to clamp a lock of hair.

[0072] The first and second treatment surfaces 4 are generally complementary surfaces. They may have different shapes depending on the intended use of the hairdressing appliance 1, and are preferably interchangeable. Typically, the treatment surfaces are flat when the hairdressing appliance 1 is used as an iron, curved (not shown) when used as a curling iron (not shown), or wavy (not shown) when used as a perming iron (not shown). Curling irons are described, for example, in document EP0619087. The treatment surfaces may also be uneven, i.e., have many protrusions, such as teeth (not shown).

[0073] Steam hair clippers also have liquid containers, which are usually water containers (not shown in Figure 1) or containers containing hair styling products, which may be housed in one of the jaws or arranged at a distance from the device in an offset base, as designed in document EP3025610.

[0074] like Figure 2 and 3 As shown, the liquid container is in fluid communication with the liquid vaporization system 7 via an injection pipe 74. Advantageously, the liquid container is located in a jaw containing the liquid vaporization system 7.

[0075] The vaporization system 7 has at least one vaporization chamber 71, referred to as the first vaporization chamber or main vaporization chamber, occupying a specific first volume, i.e., an uninterrupted or unobstructed volume. This specific volume can be substantially parallelepiped in shape, for example, having a rectangular, square, or trapezoidal cross-section. This effectively balances the compactness and efficiency of the vaporization system. The inner surface of the vaporization chamber 71 is called the lower wall of the vaporization chamber 71, i.e., the surface of the wall forming the bottom of the vaporization chamber 71. Therefore, fluid is preferentially delivered from the injection pipe 74 to this inner surface and converted into vapor.

[0076] The free end of the injection tube 74 forms an injection point in the main vaporization chamber 71. Preferably, the injection tube protrudes within the vaporization chamber 71, allowing liquid in the container to be injected into the main vaporization chamber 71 at this injection point. Typically, the liquid in the container is water or hair styling product.

[0077] The hairdressing appliance also has a steam distribution system 7', which is connected to the vaporization system 7 and has one or more steam distribution holes 75 to distribute steam along the direction of a lock of hair.

[0078] The distribution system 7' has, for example, a distribution chamber 76 that communicates steam with the vaporization chamber 71, wherein at least one steam distribution port 75 is arranged. The distribution chamber 76 may extend laterally to the vaporization system 7, preferably extending substantially along the entire length of the vaporization system 7. This achieves both structural compactness and efficiency for both the vaporization system 7 and the distribution system 7'.

[0079] Preferably, the vaporization chamber 71 is a compartment heated by the heater 8, for example, the heater 8 is arranged to contact the vaporization chamber 71 to vaporize the liquid injected into the vaporization chamber 71, which is not limited by heating by other components of the generator 1.

[0080] The heater 8 may be located, for example, below the vaporization system 7, as shown in the exploded view of Figure 1.

[0081] The heater 8 may be arranged on the larger outer surface of the vaporization system 7, preferably relative to the distribution hole 75, and at least partially in close contact with the side surface of the vaporization system 7.

[0082] Generally, vaporization takes place in vaporization system 7 and steam distribution system 7'.

[0083] Preferably, the vaporization system 7 has a maximum external volume of 110 x 35 x 12.5 mm and an internal volume sufficient to store scale in at least 35 liters of hard water with a hardness of 28°F. The heater 8 is used, for example, to vaporize water in a sequence of 10 seconds followed by 10 seconds, with a flow rate of approximately 1 g / min ± 0.5 g / min.

[0084] The vaporization system 7 can be made of metal, alloy, or any heat transfer material. Typically, the vaporization system 7 is made of aluminum and can be molded or pressed.

[0085] The vaporization system 7 may have multiple parts, particularly at least one cover. According to the exploded view shown in Figure 1, the vaporization system 7 has a first part having a vaporization chamber 71, which is attached to the heater 8, and a second part, here the cover, having holes that connect to steam distribution holes 75. Preferably, these different parts are sealed, for example, by silicone sealing rings.

[0086] Advantageously, the reed can be pressed against the heater 8 by the vaporization system 7 to ensure sustained contact and optimal operation.

[0087] The heater 8 can typically be a positive temperature coefficient resistor or a ceramic material, but generally any system that can heat the vaporization chamber 71 as needed.

[0088] 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 placed close to the outer surface of the vaporization chamber 71 and the outer surface of the steam distribution system 7' to simultaneously heat the vaporization system 7 and the distribution system 7' in a small volume.

[0089] The heater 8 can be adjusted by a thermistor, which, for example, has a negative temperature coefficient, functions as a temperature sensor and is preferably positioned above the injection point. The thermistor makes the hair clipper 1 safer, allowing liquid injection to be stopped under special conditions, such as based on the temperature of the heater 8. Typically, the lower limit is approximately 95°C and the upper limit is 130°C, or depending on a smaller temperature range, the lower limit is 105°C and the upper limit is 120°C, or even 110°C.

[0090] Advantageously, the injection pipe 74 is positioned substantially at the center of the vaporization chamber 71. The end of the injection pipe 74, forming the injection point, is positioned substantially along one-quarter of the length of the vaporization chamber 71. In practice, the injection point should be located in the area of ​​the vaporization chamber 71 where the maximum temperature is regulated, away from the inner wall of the vaporization chamber 71, to improve the vaporization efficiency of the injected liquid. It should also be located away from the injection point of the steam distribution device 7' to limit the risk of undevastated hot water ejecting.

[0091] Preferably, the outer wall of the injection pipe 74 is at least 1 mm away from the inner wall of the vaporization chamber 71, and the height of the vaporization chamber is greater than 8 mm, so as to limit the scale deposition at the free end of the injection pipe 74 and thus prevent premature clogging.

[0092] The injection tube 74 may be made of a material that is less prone to scale adhesion, thus limiting scale deposition. Typically, polytetrafluoroethylene (PTFE, trade name Téflon) is chosen, as it offers excellent anti-adsorption properties and is highly heat-resistant. Preferably, at least the inner wall of the injection tube 74 is coated with PTFE, enabling the injection tube 74 to withstand high temperatures, especially above 300°C, and providing a very low coefficient of friction on the inner wall, thereby limiting scale deposition on the inner wall of the injection tube 74.

[0093] The injection tube 74 preferably has a large inner cross-section to prevent premature blockage, for example, at its free end. The diameter of the inner cross-section is typically greater than 3 mm, preferably greater than 4 mm. To limit heat transfer from the wall of the vaporization chamber 71 to the liquid, the wall thickness of the injection tube 74 is preferably greater than 1 mm. A polyphenylene sulfide (PPS) ring 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.

[0094] Preferably, the ratio of the height of the vaporization chamber 71 to the diameter of the inner cross-section of the injection pipe 74 is 0.55 to 0.75; typically, for a height of 4.9 mm and an inner diameter of 3 mm, this ratio is approximately 0.6. In fact, these dimensions have been optimized to ensure greater resistance to fouling while accommodating the dimensions of different components.

[0095] Advantageously, the portion forming the free end of the injection pipe 74 can have a special shape to concentrate any scale that may accumulate in a specific area, while also providing an area where the liquid can continue to enter the vaporization chamber 71 without being affected by scale accumulation.

[0096] For example, the injection tube 74 has a bevel at the free end forming the injection point, such as... Figure 4A As shown.

[0097] In other embodiments, or additionally, the injection tube 74 may have a through-hole that extends substantially from the free end forming the injection point along the injection tube. Even in the event of scale buildup at the free end of the injection tube 74, the shape of the through-hole allows liquid from the container to flow into the vaporization chamber 71.

[0098] In one embodiment, the through-hole of the injection tube 74 is a cut-out portion on half of the cross-section of the injection tube 74, extending substantially parallel to the axis of the injection tube 74. Figures 2 to 5 In the illustrated embodiment, the injection tube 74 is arranged in the vaporization chamber 71 such that the cut portion is located on the opposite side of the wall forming the bottom of the vaporization chamber 71. Typically, in embodiments where the vaporization chamber 71 is closed by a plate forming a cover, this means that the cut portion of the tube 74 thus faces the plate forming the cover.

[0099] Preferably, as shown in the different figures, the injection pipe 74 is different from the vaporization chamber 71, i.e., not the same component. The injection pipe 74 protrudes within the vaporization chamber 71.

[0100] exist Figure 7 In the illustrated embodiment, the through-hole of the injection tube 74 has at least one slit extending along an axis substantially parallel to the injection tube 74. Preferably, the through-hole may have two slits extending on both sides of the injection tube 74.

[0101] 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. Therefore, the hydrophobic layer 9 is distinct from the injection pipe 74. The hydrophobic layer 9 does not vaporize below the injection point; instead, it pushes the liquid out to vaporize within the vaporization chamber 71, preventing the accumulation of deposited scale below the injection point. In fact, the hydrophobic layer 9 is characterized by high surface tension.

[0102] Advantageously, the hydrophobic layer 9 is made of polytetrafluoroethylene (PTFE). In fact, PTFE is a high-temperature resistant material (especially above 300°C) and has a very low coefficient of friction, thus limiting scale deposition at the injection point because water cannot remain there.

[0103] 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 surface that the hydrophobic layer 9 can cover is between 10 mm.2 and 2000mm 2 Between, preferably between 100mm 2 and 1000mm 2 Between, more preferably between 500 mm² and 600 mm² 2 Between. Typically, the hydrophobic layer 9 can cover the inner surface of the bottom forming the vaporization chamber 71, with a covered surface of approximately 552 mm. 2 .

[0104] The hydrophobic layer 9 may have a planar shape, preferably substantially rectangular or triangular. It may also take the form of a three-dimensional shape, for example defined by an inclined plane, to improve the sliding efficiency of the liquid away from the vaporization point at the free end of the injection tube 74. This three-dimensional shape also helps to distribute the liquid well as it reaches the vaporization chamber, removing large droplets and distributing them as smaller droplets across the entire inner surface of the vaporization chamber 71. Therefore, vaporization efficiency is improved 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 formed during the manufacture of the vaporization chamber 71, typically in a molding process.

[0105] exist Figure 4A and 4B In the illustrated embodiment, the hydrophobic layer 9 has, for example, a cone shape. Alternatively, the hydrophobic layer 9 may have a truncated cone shape.

[0106] In one embodiment, the hydrophobic layer 9 can be formed by applying a hydrophobic material to the inner surface of the vaporization chamber 71. Typically, the hydrophobic material can be applied as a coating or a coating layer, or by steam treatment on the inner surface of the vaporization chamber 71.

[0107] Advantageously, the hydrophobic layer 9 is a component embedded in the vaporization chamber 71. The embedded component is held in place in the vaporization chamber 71 by a fixing device having a positioning element 710 for positioning the embedded component relative to the injection point.

[0108] exist Figure 2 and 3 In the embodiment of the vaporization chamber 71 shown, the positioning member 710 has a positioning half-pin 710a formed in the vaporization chamber 71 for engaging with a groove 9a of complementary shape arranged in the insert member 9.

[0109] In other embodiments, or additionally, the inner surface of the vaporization chamber 71 has a hydrophilic layer, characterized by a low surface tension. The hydrophilic layer 10 extends over all or part of the inner surface of the vaporization chamber 71.

[0110] In the sense that the hydrophilic layer 10 covers only the surface below the injection point, the hydrophilic layer 10 can be positioned only below the injection point. Preferably, the hydrophilic layer 10 extends over the entire inner surface of the vaporization chamber 71 to maximize liquid diffusion.

[0111] Preferably, the hydrophilic layer 10 has a woven material, such as a glass fiber fabric, which can significantly limit bubbling.

[0112] According to, especially in Figure 4A and 4B In the specific embodiment shown above, 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 falls in droplets onto the hydrophobic layer 9. Due to the high surface tension of the hydrophobic material constituting the hydrophobic layer 9, the droplets maintain a spherical shape and thus slide towards the hydrophilic layer 10, maintaining a certain distance from the injection point. The hydrophilic layer 10 has a low surface tension, allowing the water droplets to vaporize immediately. This reduces scale formation and, if necessary, keeps it away from the injection point.

[0113] Advantageously, but not restrictively, especially as Figure 2 and 3 As shown, the liquid vaporization system 7 may also have a second vaporization chamber, or auxiliary vaporization chamber 72, which is in fluid communication with the first vaporization chamber 71 and occupies a different second volume. Therefore, the first vaporization chamber 71 is arranged upstream of the second vaporization chamber 72 along the steam flow direction.

[0114] In this embodiment, the liquid injected into vaporization chamber 71 is converted into steam in at least two different vaporization chambers (71, 72). This effectively retains unwanted scale, improves the anti-calcification efficiency of the hair clipper 1, and thus extends its service life.

[0115] Preferably, the second vaporization chamber, i.e. the auxiliary vaporization chamber 72, has discontinuity or obstruction due to the presence of guide vanes 73, forming a tortuous channel for steam.

[0116] The term "guide vane 73" refers to any obstruction arranged within the chamber that, for example, causes the steam to move in a meandering manner, reducing its velocity within the auxiliary vaporization chamber 72 and increasing contact with the surfaces of the different walls of chamber 72. This vaporizes any liquid droplets present, ensuring complete vaporization of the liquid, and the heat exchange surface is increased due to the presence of the guide vane 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 uniformly trapping scale in the second vaporization chamber 72.

[0117] Preferably, the first volume occupied by the first vaporization chamber 71 is larger than the second volume occupied by the second vaporization chamber 72, or even at least twice as large, so that vaporization is carried out rapidly in the first volume without reducing the structural compactness of the vaporization system 7.

[0118] In this embodiment, the distribution chamber 76 may be arranged on the side of the vaporization chamber 71 and the auxiliary vaporization chamber 72, preferably, it is arranged substantially along the entire length of the vaporization system 7.

[0119] The corresponding arrangements and procedures are detailed in document EP2591698.

[0120] This schematically illustrates a specific embodiment of the vaporization system 7 in operation, by... Figure 6A , 6B As shown in 8A and 8B, the superiority of the aforementioned features is demonstrated.

[0121] exist Figure 6A and 6B In the first embodiment shown, the injection tube 74 has a through hole with a cut portion in half-section, and the inner surface of the vaporization chamber 71 is covered with a hydrophobic layer 9, which covers all or part of the inner surface of the vaporization chamber 71. In operation, as... Figure 6A As shown, at the first instant T1, typically when the hairdressing appliance l is used for the first time, the liquid from the container is injected into the vaporization chamber 71 by the injection tube 74 at the free end that forms the initial injection point 11.

[0122] The injected water, at a vaporization point far from the initial injection point 11, comes into contact with the hydrophobic layer 9 and vaporizes through a rapid increase in temperature. The injected liquid water may contain minerals, and limescale gradually accumulates at the end forming the initial injection point 10. Scale may gradually deposit inside the injection pipe 74 until the end becomes blocked.

[0123] like Figure 6B As shown, at the instant T2 following instant T1, for example, after more than 10 liters of hard water with a hardness typically of 28°f is injected into the vaporization chamber 71, scale blockage 12 blocks the end of the injection pipe 74. Therefore, water flows into the vaporization chamber 71 at another injection point 11' located upstream of the initial injection point 11. The water may flow on both sides of the injection pipe 74 or above the scale blockage 12.

[0124] In this embodiment, throughout the entire use of the hairdressing appliance 1, the injection point 11' gradually deviates from the cut portion of the injection tube 74 depending on the amount of limescale buildup. In other words, the time it takes for the injection point to become clogged by limescale is significantly delayed, because water will not be injected until the entire length of the cut portion of the injection tube 74 is clogged with limescale. Therefore, the appliance's resistance to fouling is significantly improved.

[0125] exist Figure 8A and 8B In the second embodiment shown, the injection tube 74 has a through hole with a slit at its free end, and the inner surface of the vaporization chamber 71 is covered with a hydrophobic layer 9, which covers all or part of the inner surface of the vaporization chamber 71. In operation, as... Figure 8A As shown, at the first instant Tl', typically when the hairdressing appliance l is used for the first time, the liquid from the container is injected into the vaporization chamber 71 by the injection tube 74 at the free end that forms the initial injection point 11.

[0126] As in the previous embodiment, the injected water, at a vaporization point far from the initial injection point 11, comes into contact with the hydrophobic layer 9 and vaporizes rapidly through a rise in temperature. The injected liquid water may contain minerals, and limescale gradually accumulates at the end forming the initial injection point 10. Scale may gradually deposit inside the injection pipe 74 until it becomes blocked at the end.

[0127] like Figure 8B As shown, at the instant T2' following instant T1', for example, after more than 10 liters of hard water with a hardness typically 28°f is injected into the vaporization chamber 71, scale blockage 12 blocks the end of the injection pipe 74. Therefore, water flows into the vaporization chamber 71 at another injection point 11' located upstream of the initial injection point 11. In the special case where the through-hole has two slits on both sides of the injection pipe 74, water can flow at the injection point on both sides of the injection pipe 74.

[0128] As in the previous embodiment, the injection point 11' gradually deviates along the gap throughout the use of the hairdressing appliance 1, depending on the amount of limescale buildup. In other words, the time it takes for the injection point to become clogged with limescale is significantly delayed, because water will not stop flowing until the entire length of the cut section of the injection tube 74 is blocked by limescale. Therefore, the appliance's resistance to fouling is significantly improved.

[0129] Therefore, adding through holes to the injection tube 74 and / or arranging a hydrophobic layer 9 at the injection point can make the appliance 1 more resistant to fouling and extend the service life of the appliance 1.

[0130] Readers should understand that many changes can be made, but none will actually exceed the new content and advantages described here. Therefore, all such changes fall within the scope of the proposed barbering apparatus.

Claims

1. A steam hair-styling appliance for hair shaping, comprising: - A first jaw plate (2) and a second jaw plate (3) are arranged opposite to and hinged to each other, a first processing surface (4) is supported by the first jaw plate (2), and a second processing surface (4) is supported by the second jaw plate (3), the first and second processing surfaces being configured to clamp at least one strand of hair. -Liquid container, The first and / or second jaw plates (2, 3) also include: - A vaporization system (7) for vaporizing a liquid into steam, comprising at least one vaporization chamber (71) having an inner surface and communicating with a liquid container via an injection pipe (74) having a free end forming a liquid injection point in the vaporization chamber (71). - A distribution system (7') for distributing steam from the vaporization system (7), comprising at least one steam distribution orifice (75) for distributing steam along the direction of at least one strand of hair. The vaporization chamber (71) is characterized in that its inner surface is at least partially covered with a hydrophobic layer (9), which is located below the injection point formed by the free end of the injection pipe (74). The inner surface of the vaporization chamber (71) also has a hydrophilic layer (10), which is at least partially covered by a hydrophobic layer (9).

2. The steam hair clipper (1) according to claim 1, characterized in that, The hydrophobic layer (9) comprises polytetrafluoroethylene (PTFE).

3. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The hydrophobic layer (9) is positioned only below the injection point, and the positioning area is between 10 mm. 2 and 2000mm 2 between.

4. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The hydrophobic layer (9) has a planar shape.

5. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The hydrophobic layer (9) has a three-dimensional shape and has an inclined plane.

6. The steam hair clipper (1) according to claim 5, characterized in that, The hydrophobic layer (9) has a cone shape or a truncated cone shape.

7. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The hydrophobic layer (9) is an embedded element in the vaporization chamber (71) and is held in place by a fixing device including a positioning element (710) for positioning the embedded element relative to the injection point.

8. The steam hair clipper (1) according to claim 7, characterized in that, The positioning element (710) has a positioning half-pin (710a) formed in the vaporization chamber (71) and a groove (9a) for engaging with a shape complementary to that arranged in the insert element.

9. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The vaporization chamber (71) is molded from a metallic material, and the hydrophobic layer (9) is formed by applying a hydrophobic material to the inner surface of the vaporization chamber (71).

10. The steam hair clipper (1) according to claim 1, characterized in that, The hydrophilic layer (10) is made of fabric material.

11. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The injection tube (74) has a bevel at the free end where the injection point is formed.

12. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The injection tube (74) has a half-cut section.

13. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The vaporization system (7) also includes an auxiliary vaporization chamber (72) which is in fluid communication with the vaporization chamber (71), the auxiliary vaporization chamber (72) including a plurality of guide vanes (73).

14. The steam hair clipper (1) according to claim 1 or 2, characterized in that, The steam distribution system (7') includes a distribution chamber (76) in which at least one steam distribution hole (75) is arranged, and the distribution chamber (76) is in steam communication with the vaporization chamber (71).

15. The steam hair clipper (1) according to claim 13, characterized in that, The steam distribution system (7') includes a distribution chamber (76) in which at least one steam distribution hole (75) is arranged, the distribution chamber (76) being in steam communication with the vaporization chamber (71), and the distribution chamber (76) being arranged on the side of the vaporization chamber (71) and the auxiliary vaporization chamber (72).

16. The steam hair clipper (1) according to claim 3, characterized in that, Positioning area is between 100mm 2 and 1000mm 2 between.

17. The steam hair clipper (1) according to claim 3, characterized in that, Positioning area is between 500mm 2 and 600mm 2 between.

18. The steam hair clipper (1) according to claim 4, characterized in that, The hydrophobic layer (9) is rectangular or triangular.

19. The steam hair clipper (1) according to claim 9, characterized in that, The hydrophobic layer (9) is formed by applying a coating or covering layer to the inner surface of the vaporization chamber (71).

20. The steam hair clipper (1) according to claim 10, characterized in that, The fabric material is glass fiber fabric.

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