Steam generator for a garment care device

Abstract

The invention relates to a steam generator (SG) comprising an ironing plate (IP) comprising at least one steam vent (SV). The ironing plate defines a planar ironing surface (xy). The steam generator comprises a steam input (IN) for receiving an input steam flow (F1), and an optional first cyclonic chamber. The steam generator also comprises a second cyclonic chamber (CC2) comprising at least one steam inlet (CC2_I) and at least one steam outlet (CC2_O1, CC2_O2). The at least one steam inlet of the second cyclonic chamber is fluidly connected to the steam input. The second cyclonic chamber acts as a fluid separator. The second cyclonic chamber has a second axis of cyclonic rotation being substantially parallel to the planar ironing surface (xy). The at least one steam outlet of the second cyclonic chamber is fluidly connected to the at least one steam vent.

Description

[0001] 2024PF00067 02.12.2025

[0002] 1

[0003] STEAM GENERATOR FOR A GARMENT CARE DEVICE

[0004] FIELD OF THE INVENTION

[0005] The invention relates to steam generator for a garment care device.

[0006] The invention may be used in the field of garment care.

[0007] BACKGROUND OF THE INVENTION

[0008] A Garment care device, like a steam iron, uses heat and steam for de-wrinkling garments.

[0009] US2007193076A1 discloses a steam iron which includes a steam conditioning device with two vortex chambers. Within these chambers, conduits are provided to direct steam flow toward outlets of the device. Vortex generating elements are positioned along the steam path to create local pressure differences, thereby forming vortices in the steam. These vortices break down water droplets present in the steam into smaller particles, enabling the production of mist-steam or dry steam during operation.

[0010] A known type of garment care device comprises a base unit and a handheld unit. The two units are connected by a hose-cord in-between, the hose-cord comprising a steam tube and electric wires. When steaming is requested by the user of the device on the handheld unit, steam is firstly produced by a boiler arranged in the base unit. Known handheld units usually comprise a steam chamber being electrically heated. After steam generated in the boiler is carried in the hose-cord from the base to the handheld unit, steam reaches the handheld unit and is injected in the steam chamber for being re-heated. Eventually, steam exiting from the steam chamber is released onto garments to be treated via steam vents arranged on a heated ironing plate.

[0011] Water which is boiled in the boiler is primarily transformed into steam. Steam which is generated by the boiler is mostly wet steam, wet steam that may also contains some non-vaporized liquid (i.e. water), in particular in the form of water droplets. Furthermore, given the fact that this wet steam needs to travel through a certain length in the hose-cord to reach the handheld unit, and considering the loss of thermal energy along the hose-cord which is inevitable, condensation 2024PF00067 02.12.2025

[0012] 2 may occur inside the hose-cord, resulting in that steam reaching the handheld unit will contain even more liquid.

[0013] If the total amount of water contained in the steam entering the steam chamber is too high, the steam chamber may not have sufficient heat to fully vaporize all this amount of water. The steam chamber may thus also generate a very wet steam towards the steam vents, possibly resulting in water droplets being spread on the garment, phenomenon known as “spitting” or “leaking”. By increasing the working temperature of the steam chamber, the better water vaporization could be. However, the electrical power in the handheld unit is often limited given the fact that most electrical power is already supplied to the boiler arranged in the base, resulting in the fact the water content in steam cannot be fully vaporized.

[0014] Besides handling water content in steam generated towards steam vents, another key function of the handheld unit is to heat the ironing plate to a required temperature depending on which fabric type the garment to be treated is composed of, and maintain this temperature at appropriate range of temperature during treatment range to achieve good ironing performance.

[0015] In known handheld units, ironing plate is primarily heated by the electrical heating element in thermal exchange with the steam chamber. Since the heating element has a limited power given the energy already allocated to the boiler in the base, the heating element cannot at the same time provide sufficient thermal energy to the steam chamber in the handheld unit to ensure a good vaporization of water droplets contained in steam, and sufficient thermal energy to the ironing plate to ensure an appropriate high temperature of the ironing plate, for example for efficiently treating garments having fabric made of linen or cotton.

[0016] Moreover, known architectures of handheld units often have technical limitations in being able to quickly change the temperature of the ironing plate depending on the type of garment fabric being treated. For example, a garment made of linen should ideally be treated with an ironing plate having a maximum temperature of 230 degrees Celsius, while a garment made of wool should ideally be treated with an ironing plate having a maximum temperature of 150 degrees Celsius. In this scenario, when first treating a garment made of linen, followed by treating a garment made of wool, if the temperature of the ironing plate does not decrease sufficiently quickly, there is a risk of scorching and damaging the garment made of wool. 2024PF00067 02.12.2025

[0017] 3

[0018] There is thus a need to propose new architectures for a handheld unit ensuring not only an efficient steam vaporization, but also an appropriate heating of the ironing plate depending on the garment fabrics to be treated.

[0019] OBJECT AND SUMMARY OF THE INVENTION

[0020] It is an object of the invention to propose new architectures for a handheld unit that avoids or mitigates above-mentioned problems.

[0021] The invention is defined by the independent claims. The dependent claims define advantageous embodiments.

[0022] To this end, the steam generator according to the invention comprises:

[0023] - an ironing plate comprising at least one steam vent, the ironing plate defining a planar ironing surface,

[0024] - a steam input for receiving an input steam flow,

[0025] - an optional first cyclonic chamber,

[0026] - a second cyclonic chamber comprising at least one steam inlet and at least one steam outlet, the at least one steam inlet of the second cyclonic chamber being fluidly connected to the steam input, the second cyclonic chamber acting as a fluid separator, the second cyclonic chamber having a second axis of cyclonic rotation being substantially parallel to the planar ironing surface, the at least one steam outlet of the second cyclonic chamber being fluidly connected to the at least one steam vent. The second cyclonic chamber is beneficial as it separates water that would be contained in the input steam flow, and allows changing direction of steam flow very smoothly, without physical turning corners that would otherwise increase flow resistance and turbulence, as well as decrease velocity of steam.

[0027] Preferably, the second cyclonic chamber forms:

[0028] - a single cyclonic chamber having one steam inlet, and two steam outlets to direct two output steam flows in two opposite directions being substantially perpendicular to a longitudinal axis of the ironing plate.

[0029] This allows better space utilization by separating the steam flow into two paths to cover heated area more efficiently and more effectively. 2024PF00067 02.12.2025

[0030] 4

[0031] Preferably, the second cyclonic chamber forms: a single cyclonic chamber having one steam inlet, and one steam outlet to direct output steam flow in a direction being substantially perpendicular or parallel to the longitudinal axis, or

[0032] - two separate cyclonic chambers having two steam inlets, and two steam outlets to direct two output steam flows in two directions being substantially perpendicular or parallel to the longitudinal axis.

[0033] Having a single cyclonic chamber is suitable for certain steam generators with space constraints where only one steam engine (e.g. labyrinth path) can be arranged in.

[0034] Having two separate cyclonic chambers is suitable for certain steam generators requiring freedom to use separate cyclonic chambers in order to improve space utilization.

[0035] Preferably:

[0036] - the optional first cyclonic chamber is a first cyclonic chamber being fluidly arranged between the steam input and the second cyclonic chamber, the first cyclonic chamber comprising a steam inlet fluidly connected to the steam input, the first cyclonic chamber comprising a steam outlet fluidly connected to the at least one steam inlet of the second cyclonic chamber, the first cyclonic chamber acting as a fluid separator.

[0037] The first cyclonic chamber allows to separate water droplets that would be contained in the input steam flow, thus limiting the risks that those water droplets are later sprayed via the steam vents on a garment to be treated. Steam exiting the first cyclonic chamber enters the second cyclonic chamber, with the goal to redirect steam.

[0038] Preferably, the first cyclonic chamber comprises a first axis of cyclonic rotation being:

[0039] - substantially perpendicular to the planar ironing surface, or

[0040] - substantially parallel to the planar ironing surface.

[0041] If the first cyclonic chamber has an axis of cyclonic rotation substantially perpendicular to the planar ironing surface, this arrangement is advantageous when the input steam flow is directed substantially parallel to the planar ironing surface.

[0042] If the first cyclonic chamber has an axis of cyclonic rotation substantially parallel to the planar ironing surface, this arrangement is advantageous when the input steam flow is not directed substantially parallel to the planar ironing surface. Also, if the first cyclonic chamber has an axis of cyclonic rotation substantially parallel to the planar ironing surface, this provides freedom for 2024PF00067 02.12.2025

[0043] 5 the steam inlet and steam outlet of the first cyclonic chamber to be arranged on the same end or alternate ends.

[0044] Preferably, the first cyclonic chamber comprises a first chimney and a second chimney both being arranged coaxially around the steam outlet of the first cyclonic chamber.

[0045] The two chimneys are protruding rings arranged at the steam outlet of the first cyclonic chamber. Such arrangement enables good water separation, trapping, and removing by triple actions:

[0046] 1. Steam spins on outer wall of the outer portion where is directly heated after entering cyclone steam chamber; centrifugal force generated by spinning separates water from wet steam and pushes separated water onto heated outer wall to be steamed off; this is the first action that can be called the main spin;

[0047] 2. After circular travelling throughout the outer portion, mostly dried steam by the main spin enters inner portion and continues spinning, where centrifugal force continuous plays its role to separate more water from steam, if there is still excess water; similar to that in the main spin, water is pushed against inner wall of the middle partition, and converted to steam on the hot surface; even if the heat on middle partition is not enough to vaporize all water if excess water amount is too high, volume in the inner portion can still hold them under lifting effect from steam thrust as well as pushing effect from centrifugal force; this is the second action that can be called the secondary spin;

[0048] 3. Entrance of the outlet chimney is in the middle of the inner portion, which goes deep into steam spinning in the inner portion to collect steam from the eye of steam cyclone to be output, where it is the driest portion of steam in the cyclone steam chamber. Meanwhile, the outer wall of the outlet chimney forms a compartment together with the close-end of the inner portion, which enhance water trapping capability of the inner portion, if there is water separated from the secondary spin but not able to or not yet be vaporized; this is the third action that can be called dry steam collection.

[0049] Preferably, the steam engine further comprises a steam engine comprising at least one steam inlet and at least one steam outlet, the at least one steam inlet of the steam engine being fluidly connected to the at least one steam outlet of the second cyclonic chamber.

[0050] The steam engine is advantageous to re-heat steam received from the second cyclonic chamber.

[0051] Preferably, the steam engine forms a labyrinth pathway.

[0052] A labyrinth pathway allows an efficient re-heating of the steam. 2024PF00067 02.12.2025

[0053] 6

[0054] Preferably, the labyrinth pathway comprises:

[0055] - a first labyrinth pathway comprising a first steam inlet fluidly connected to one outlet of the at least one steam outlet of the second cyclonic chamber,

[0056] - a second labyrinth pathway comprising a second steam inlet fluidly connected to another outlet of one of the at least one steam outlet of the second cyclonic chamber, the first labyrinth pathway and the second labyrinth pathway extending relative to each other towards a rear area of the ironing plate.

[0057] Having the steam engine taking the form of two labyrinth pathways arranged in parallel towards the rear area of the ironing plate is advantageous, as each labyrinth pathway can conveniently be arranged close and adjacent to the heating element.

[0058] Preferably, the steam generator further comprises a heating element arranged adjacent to the first cyclonic chamber and the steam engine, the first cyclonic chamber being arranged adjacent to a bending portion of the heating element.

[0059] Not only the heating element provides heat to the steam engine, but also to the first cyclonic chamber. This is advantageous to heat the first cyclonic chamber in order to vaporize water droplets separated by the first cyclonic chamber. Arranging the first cyclonic chamber adjacent to the bending portion of the heating element allows an even better heat transfer to the first cyclonic chamber, and thus a better vaporization of the water droplets.

[0060] Preferably, the ironing plate comprises: an external surface intended to get into contact with a garment, and an internal surface opposite said external surface, a steam channel extending between said internal surface and an intermediate cover, the steam channel comprising a steam inlet and a steam outlet, the steam inlet of the steam channel being fluidly connected to the at least one steam outlet the steam engine, a steam distribution chamber extending between said internal surface and said intermediate cover, the steam distribution chamber being fluidly connected to the steam outlet of the steam channel for distributing steam received from the steam channel towards the at least one steam vent of the ironing plate.

[0061] By steam entering and circulating inside the steam channel, this creates a transfer of heat between steam and the internal surface of the ironing plate. As a result, ironing plate is efficiently and quickly heated by steam. The steam channel also helps to reduce the temperature drop of the 2024PF00067 02.12.2025

[0062] 7 ironing plate caused by energy absorbed by the garment being in contact with the ironing plate during treatment. Steam exiting the steam channel enters the steam distribution chamber and is then distributed by the various steam vents towards the garment to be treated.

[0063] Preferably, the steam channel comprises a bottom surface and a top surface,

[0064] - a plurality of protruding ribs being arranged onto the bottom surface and extending substantively parallel to a longitudinal axis of the ironing plate, and / or

[0065] - a plurality of protruding ribs being arranged onto the top surface and extending substantively parallel to the longitudinal axis.

[0066] The plurality of protruding ribs arranged onto the bottom surface help to absorb thermal heat from steam circulating in the steam channel, which in turn will help to transfer heat to the ironing plate IP and then heat-up the ironing plate.

[0067] If a plurality of protruding ribs is also arranged onto the top surface, this will help to re-heat steam circulating in the steam channel, which in turn will also help to transfer heat to the ironing plate via heated steam.

[0068] Preferably, the steam generator further comprises a third cyclonic chamber comprising at least one steam inlet and a steam outlet, the third cyclonic chamber acting as a fluid separator, the steam inlet of the third cyclonic chamber being fluidly connected to the at least one steam outlet of the steam engine, the steam outlet of the third cyclonic chamber being fluidly connected to the steam inlet of the steam channel.

[0069] This means that the third cyclonic chamber is arranged between the steam engine and the steam channel. The third cyclonic chamber is beneficial as it may continue to separate water that would be contained in the steam flow, and recombine steam flows coming from the steam engine into a single steam flow, in particular when the steam engine takes the form of two (or more) labyrinths pathways.

[0070] Preferably, the third cyclonic chamber has a third axis of cyclonic rotation being substantially perpendicular to the planar ironing surface.

[0071] Having axis of cyclonic rotation perpendicular to the planar ironing surface allows a larger direct contact surface between the third cyclonic chamber and the heating element. There is thus a more effective heat transfer to the third cyclonic chamber, and thus a more efficient vaporization of water droplets having been separated. This also improves the fluid separation efficiency thanks to the earth gravity. 2024PF00067 02.12.2025

[0072] 8

[0073] The invention is also about a garment care device comprising a base, a handheld unit, a hose cord fluidly connecting the base and the handheld steamer,

[0074] - the base comprising a boiler for generating steam, steam generated by the boiler being carried in the hose cord to the handheld unit,

[0075] - the handheld unit comprising a steam generator as presented above, the steam input of the steam generator being fluidly connected to the hose cord for receiving steam carried by the hose cord.

[0076] This garment care device allows an efficient steam generation, with limited spiting on the garments, and quick adaptability to various types of fabrics requiring different steam characteristics and temperature of ironing plate.

[0077] This garment care device allows an efficient steam generation, with limited spiting on the garments, and quick adaptability to various types of fabrics requiring different steam characteristics and temperature of ironing plate.

[0078] Detailed explanations and other aspects of the invention will be given below.

[0079] BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Particular aspects of the invention will now be explained with reference to the embodiments described hereinafter and considered in connection with the accompanying drawings, in which identical parts or sub-steps are designated in the same manner :

[0081] Particular aspects of the invention will now be explained with reference to the embodiments described hereinafter and considered in connection with the accompanying drawings, in which identical parts or sub-steps are designated in the same manner :

[0082] Figs.1 to 6 depict various embodiments of a steam generator according to the invention, Fig.7A-7B-7C depict various heating elements used in a steam generator according to the invention,

[0083] Figs.8 to 9 depict various embodiments of a steam generator according to the invention, Fig.lOA and 10B depict partial internal views of a steam generator according to the invention,

[0084] Figs.11 to 14 depict various steam engines used in a steam generator according to the invention,

[0085] Figs.15 to 19 depict various embodiments of a steam generator according to the invention, 2024PF00067 02.12.2025

[0086] 9

[0087] Figs.20-21 depict partial internal views of a steam generator according to the invention, Figs.22 to 27 depict various embodiments of a steam generator according to the invention,

[0088] Fig.28 depict a two-dimensional internal view of a steam generator according to the invention,

[0089] Figs.29 to 31 depict various embodiments of a steam generator according to the invention,

[0090] Fig.32 depicts an exploded view of a steam generator according to the invention,

[0091] Fig.33 depicts cross-sectional views along an axis AA of a steam generator according to the invention as depicted in Fig.32,

[0092] Fig.34 depicts a cross-sectional view along an axis BB of a steam generator according to the invention as depicted in Fig.32,

[0093] Figs.35A-35B-35C depict cross-sectional views along an axis CCC of a steam generator according to the invention as depicted in Fig.32,

[0094] Fig.36 depicts a cross-sectional view along an axis DD of a steam generator according to the invention as depicted in Fig.32,

[0095] Fig.37 depicts partial views of a steam generator according to the invention,

[0096] Fig.38A-38B depict partial three-dimensional views of a steam generator according to the invention,

[0097] Fig.39A-39B depict partial views of a steam generator according to the invention,

[0098] Fig.40 depicts a partial three-dimensional view of a steam generator according to the invention,

[0099] Fig.41 depict a garment care device according to the invention.

[0100] DETAILED DESCRIPTION OF THE INVENTION

[0101] In the following, various aspects of the invention will be illustrated in isolation or in combination, by referring to different drawings. In those drawings, arrows (solid or dotted lines) schematically represent steam flow. It is also noted that arrows are not always represented from one drawing to another, for not overloading too much the content.

[0102] In the following, by “substantially parallel”, it means an angle of 0 degrees + / -20 degrees.

[0103] In the following, by “substantially perpendicular”, it means an angle of 90 degrees + / -20 degrees.

[0104] Figs.19 illustrates a steam generator SG according to the invention. 2024PF00067 02.12.2025

[0105] 10

[0106] In this embodiment, the steam generator SG comprises an ironing plate IP comprising at least one steam vent SV. Only five steam vents SV are presented (three at the front, and two on lateral sides), but there could have a different number of steam vents, as well as their location on the ironing plate, without departing from the scope of the invention.

[0107] The steam generator SG also comprises a steam input IN for receiving an input steam flow Fl. The steam input IN is fluidly connected, for example via a hose-cord, to an external boiler in charge of generating the input steam flow Fl. This aspect will be further detailed.

[0108] The steam generator SG also comprises an optional first cyclonic chamber (not shown in Fig.19). This aspect will be further detailed. By “optional”, it means that the first cyclonic chamber can be omitted, resulting in that the input steam flow Fl can directly enter the second cyclonic chamber CC2, as illustrated in Fig.19. This aspect will be further detailed.

[0109] The steam generator SG further comprises a second cyclonic chamber CC2 acting as a fluid separator. The second cyclonic chamber comprises one steam inlet CC2 I and two steam outlets (CC2 O1, CC2 O2). The steam inlet CC2 I is fluidly connected to the steam input IN.

[0110] The second cyclonic chamber has a second axis A2 of cyclonic rotation being substantially parallel to the planar ironing surface (xy).

[0111] The steam outlets of the second cyclonic chamber CC2 are fluidly connected to the at least one steam vent SV.

[0112] In this embodiment, the second cyclonic chamber CC2 forms a single cyclonic chamber CC2 having one steam inlet CC2 I and two steam outlets (CC2 O1, CC2 O2) to direct two output steam flows in two opposite directions (DI, D2) being substantially perpendicular to a longitudinal axis (x) of the ironing plate IP.

[0113] The second cyclonic chamber CC2 acts as a fluid separator and is adapted to separate any water droplets, for example condensation having happened in the hose-cord, from the input steam flow Fl, by centrifugal force. Said differently, this is a liquid-gas separator; meanwhile, it can also separate solid particles from fluid, if any. Centrifugal force is caused by the inertia of a body; its resistance to change in its direction of motion. By providing a cyclonic steam path, any water droplets are centrifugally urged against a peripheral sidewall of the second cyclonic chamber CC2. These may be small water droplets formed in the input steam flow Fl, in particular if steam is carried in a steam hose cord connected to the steam inlet IN. Water droplets being expelled 2024PF00067 02.12.2025

[0114] 11 against internal surfaces of the second cyclonic chamber CC2 may thus be vaporized by heat generated by a heating element HE (not shown) embedded adjacent the second cyclonic chamber CC2. Dry steam, that is to say steam from which water droplets are at least substantially absent, is then able to flow through the steam outlets (CC2 O1, CC2 O2) of the second cyclonic chamber CC2. Details of the heating element HE will be described in the following along with other embodiments.

[0115] The second cyclonic chamber CC2 also enables changing the direction of steam flow received on its steam inlet CC2 I. Steam exiting the second cyclonic chamber CC2 can thus enter a steam engine SE arranged downstream, via the steam inlet (LP I1, LP I2) of the steam engine, without any abrupt physical turns to the steam path, which might otherwise result in turbulent flow and also scale accumulation in the steam path. In other words, the second cyclonic chamber CC2 helps to redirect steam flow naturally in appropriate direction of the steam engine SE. This will result enhancing steam flow smoothness so that the steam engine SE can perform better.

[0116] The steam engine SE acts as a steam booster by increasing energy of steam received from the steam input IN, by heating up steam to a higher temperature as it passes through the steam path of the steam engine.

[0117] Figs.18 illustrates a preferred steam generator SG according to the invention.

[0118] Embodiment of Fig.18 differs from the embodiment of Fig.19 in that a first cyclonic chamber CC1 is arranged between the steam input IN and the steam inlet CC2 O of the second cyclonic chamber CC2. This means that the second cyclonic chamber CC2 is fluidly arranged between the first cyclonic chamber CC1 and the steam engine SE. All steam received from the first cyclonic chamber CC1 enters the second cyclonic chamber CC2, and all steam exiting the second cyclonic chamber CC2 enters the steam engine SE.

[0119] The steam engine SE acts as a steam booster by increasing energy of dry steam received from the second cyclonic chamber CC2, by heating up steam to a higher temperature as it passes through the steam path of the steam engine.

[0120] The first cyclonic chamber CC1 comprises a steam inlet CC1 I and a steam outlet CC1 O. The steam inlet of the first cyclonic chamber is fluidly connected to the steam input IN to receive the input steam flow Fl. The first cyclonic chamber CC1 acts as a fluid separator and is adapted to separate any water droplets, for example condensation having happened in the hose-cord, from the input steam flow, by centrifugal force. Said differently, this is a liquid-gas separator; 2024PF00067 02.12.2025

[0121] 12 meanwhile, it can also separate solid particles from fluid, if any. Centrifugal force is caused by the inertia of a body; its resistance to change in its direction of motion. By providing a cyclonic steam path, any water droplets are centrifugally urged against a peripheral sidewall of the cyclonic chamber. These may be small water droplets formed in the input steam flow Fl, in particular if steam is carried in a steam hose cord connected to the steam inlet IN. Water droplets being expelled against internal surfaces of the first cyclonic chamber may thus be vaporized by heat generated by a heating element HE (not shown) embedded adjacent the first cyclonic chamber CC1. Dry steam, that is to say steam from which water droplets are at least substantially absent, is then able to flow through the steam outlet CC1 O of the first cyclonic chamber. Details of the heating element HE will be described in the following along with other embodiments.

[0122] The steam input IN is arranged on the outer periphery of the first cyclonic chamber CC1, so that input steam flow Fl is received tangentially inside the first cyclonic chamber CC1 compared to this outer periphery.

[0123] Preferably, the first cyclonic chamber CC1 is arranged along the longitudinal (symmetrical) axis (x) of the ironing plate IP.

[0124] In the following, various alternative embodiments according to the invention will be described.

[0125] Figs.1-2 illustrate another steam generator SG according to the invention. Fig. l corresponds to a top view, while Fig.2 corresponds to a vertical cross-sectional view along longitudinal axis (x).

[0126] The steam generator SG comprises a steam engine SE comprising one steam inlet SE I and one steam outlet SE O. The steam inlet SE I of the steam engine SE is fluidly connected to the steam outlet CC1 O of the first cyclonic chamber CC1.

[0127] The steam engine SE acts as a steam booster by increasing energy of dry steam received from the first cyclonic chamber CC1, by heating up steam to a higher temperature as it passes through the steam path of the steam engine.

[0128] In the embodiment of Figs.1 and 2, the steam engine SE comprises a single steam inlet SE I and a single steam outlet SE O. The steam engine is primarily composed of a hollow chamber heated by the heating element HE, as separately illustrated in Fig.l 1. The steam engine SE is fluidly closed by a top cover TCO. A protruding grid pattern PGP may advantageously be arranged on 2024PF00067 02.12.2025

[0129] 13 a bottom surface of the steam engine SE for improving heat transfer to steam circulating in the steam engine.

[0130] In an alternative embodiment depicted in Fig.3, the steam engine is primarily composed of a labyrinth pathway LP extending on top of the heating element HE and towards the rear area RA of the ironing plate IP. The labyrinth pathway LP forms a winding path with internal protruding walls WA, as separately illustrated in Figs.12-13-14 showing other structures of possible labyrinth paths. The labyrinth pathway LP comprises a single steam inlet LP_I and a single steam outlet LP_O. Fig.4 illustrates the same embodiment as Fig.3, but without showing the heating element HE by transparency, for clarity purpose. Fig.5 illustrate the same embodiment as Figs.3 and 4 along a cross-sectional view.

[0131] In an alternative embodiment depicted in Fig.15, the steam engine is primarily composed of two separate labyrinth pathways LP1 / LP2 extending on top of the heating element HE and towards the rear area RA of the ironing plate IP. The labyrinth pathways LP1 / LP2 comprises two steam inlets LP I1 / LP I2 and two steam outlets LP Ol / LP O2. The two steam outlets LP Ol / LP O2 converge into a single area at the rear area RA of the ironing plate IP, for entering the steam inlet SC I of the steam channel SC. The steam engine SE is the source of steam for the steam channel SC. Aspects of the steam channel SC will be described in the following.

[0132] Given the fact that the two labyrinths LP1 / LP2 are arranged adjacent and along the shape of the heating element HE, this increases the heat transfer in each labyrinth, so increase efficiency of the vaporization and steam heating in each labyrinth.

[0133] The heating element HE is arranged adjacent to the first cyclonic chamber CC1 and the steam engine SE.

[0134] Preferably, the first cyclonic chamber CC1 is arranged adjacent to a bending portion BP of the heating element, which allows the first cyclonic chamber CC1 to be efficiently heated by the heating element HE, in order for water droplets separated by the first cyclonic chamber CC1 to be efficiently vaporized in the first cyclonic chamber CC1. Preferably, the bending portion BP of the heating element HE is directing toward the front area FA of the ironing plate IP.

[0135] Figs.7A-7B-7C depicts some examples of heating elements HE.

[0136] Fig.7A corresponds to a U-shape heating element, the bending portion BP being arranged at the front area of the ironing plate IP.

[0137] Figs.7B-7C illustrate other shapes for the heating elements HE, snake-shape on Fig.7B, A-shape on Fig.7C, all comprising a bending portion BP arranged at the front area FA of the ironing plate 2024PF00067 02.12.2025

[0138] 14

[0139] IP. Shapes can also be asymmetrical compared to the longitudinal axis (x) of the ironing plate IP.

[0140] Preferably, the heating element HE is arranged symmetrically compared to the longitudinal (symmetrical) axis (x) of the ironing plate IP, as illustrated in the embodiment of Fig.1, 3 or 15.

[0141] In embodiments illustrated in Figs.1 to 5, the ironing plate IP forms the bottom part of the steam generator SG. In this configuration, garments to be treated by steam exiting from steam vents SV are located below the ironing plate IP compared to vertical axis (z).

[0142] Alternatively, as illustrated in embodiment of Fig.6, the ironing plate IP can also form the top part of the steam generator SG. In this configuration, garments to be treated by steam exiting from steam vents SV are located above the ironing plate IP compared to vertical axis (z).

[0143] In the various embodiments according to the invention, for example as illustrated in Figs.1 to 5, the first cyclonic chamber CC1 has an axis Al of cyclonic rotation substantially perpendicular to the planar ironing surface (xy). This arrangement is advantageous when the input steam flow Fl fluidly connected to the steam input IN is directed substantially parallel to the planar ironing surface.

[0144] Alternatively, as illustrated in embodiment of Fig.8, the first cyclonic chamber CC1 can also have its axis Al of cyclonic rotation substantially parallel to the planar ironing surface (xy). This arrangement is advantageous when the input steam flow Fl fluidly connected to the steam input IN is directed substantially perpendicular to the planar ironing surface.

[0145] Having axis Al perpendicular to the planar ironing surface (xy) is preferred compared to having axis Al parallel to the planar ironing surface (xy), as the direct contact surface between the first cyclonic chamber CC1 and the heating element HE can be larger. There is thus a more important heat transfer to the first cyclonic chamber CC1, and thus a more efficient vaporization of water droplets having been separated. Also, when having axis Al perpendicular to the planar ironing surface (xy), this improves the fluid separation efficiency thanks to the earth gravity.

[0146] The ironing plate comprises an external surface IP ES intended to get into contact with a garment, and an internal surface IP IS being opposite the external surface. The ironing plate defines a planar ironing surface (xy). The ironing plate has a longitudinal axis (x) directing from a rear area RA towards a front area FA. 2024PF00067 02.12.2025

[0147] 15

[0148] The steam generator SG also comprises a steam channel SC extending between the internal surface IP IS of the ironing plate IP and an intermediate cover ICO fluidly enclosing the internal surface. The steam channel comprises a steam inlet SC I and a steam outlet SC O. The steam inlet of the steam channel is fluidly connected to the at least one steam outlet of the steam engine SE.

[0149] The steam channel enables transfer / replenish of energy / heat to maintain temperature of the ironing plate IP, or reduce temperature drop of the ironing plate from energy / heat loss in the garment during ironing. In other words, the steam channel helps to transfer heat from the steam circulating therein, to the ironing plate IP.

[0150] The steam inlet SC I of the steam channel SC is arranged above a rear area RA of the ironing plate IP, while the steam outlet SC O of the steam channel SC is arranged above a front area FA of the ironing plate.

[0151] The steam channel SC defines a volume being sandwiched between the intermediate cover ICO and the ironing plate IP.

[0152] When illustrated on a top view, like in Figs.l to 4, the steam channel SC is represented via a closed dotted line showing its outer periphery.

[0153] In embodiments illustrated in Figs.l to 5, the steam channel SC extends underneath the steam engine SE (or underneath the labyrinth pathway LP). This corresponds to the ironing plate IP being the lowest portion of the steam generator SG. In those embodiments, the heating element HE is embedded into the intermediate cover ICO, meaning that the heating element HE is arranged between the steam engine SE and the steam channel SC.

[0154] Alternatively, as illustrated in embodiment of Fig.6, the steam channel SC extends above the steam engine SE (or above the labyrinth pathway LP). This corresponds to the ironing plate IP being the highest portion of the steam generator SG. In this embodiment, the heating element HE is not embedded into the intermediate cover ICO, but arranged below the steam engine SE (or below the labyrinth pathway LP).

[0155] The steam generator also comprises a steam distribution chamber SDC extending between the internal surface IP IS of the ironing plate IP and the intermediate cover ICO. The steam 2024PF00067 02.12.2025

[0156] 16 distribution chamber SDC is fluidly connected to the steam outlet SC O of the steam channel SC for distributing steam received from the steam channel SC towards the at least one steam vent SV of the ironing plate IP.

[0157] Preferably, as illustrated for example in Fig.l, the steam distribution chamber SDC is arranged on a lateral side(s) of the steam channel SC, preferably symmetrically arranged on each side of the longitudinal axis (x) of the ironing plate IP. The steam distribution chamber SDC receives steam from the steam outlet SC O of the steam channel, and steam exiting from the steam channel SC is then distributed towards the various steam vents SV, for at the end be sprayed on the garment to be treated.

[0158] Preferably, as depicted in Fig. lOA, the first cyclonic chamber CC1 comprises a first chimney CHI and a second chimney CH2 both being arranged coaxially around the steam outlet CC1 O of the first cyclonic chamber. The two chimneys correspond to protruding rings, cylindricalshaped, arranged around the steam outlet CC1 O of the first cyclonic chamber CC1. The two chimney are arranged coaxially around the first axis Al of cyclonic rotation of the first cyclonic chamber CC1. Those two rings can be arranged either when the first axis Al of cyclonic rotation is substantially perpendicular to the planar ironing surface (xy) as depicted in Fig.10, or when the first axis Al of cyclonic rotation is substantially parallel to the planar ironing surface (xy) as depicted in Fig.8.

[0159] When the first axis Al of cyclonic rotation of the first cyclonic chamber CC1 is substantially perpendicular to the planar ironing surface (xy), the two chimneys CHI / CH2 face downwards, towards the bottom of the first cyclonic chamber CC1.

[0160] This arrangement of the two chimneys allows that any water droplets not vaporized will drop by gravity to the heated bottom of the first cyclonic chamber CC1.

[0161] Fig. lOB illustrates various dimensions of chimney CHI and chimney CH2.

[0162] Preferably, the outer chimney CH2 and the inner chimney CHI are substantially cylindrically- shaped in view of lowering steam flow resistance.

[0163] Preferably, the outer chimney CH2 as a diameter DD2 larger than the diameter DD1 of the inner chimney CHI. Diameter DD1 is in the range 5-10 mm, for example 7 mm, and diameter DD2 is in the range 15-25, for example 20 mm. 2024PF00067 02.12.2025

[0164] 17

[0165] Preferably, the outer chimney CH2 has a length LL2 longer than the length LL1 of the inner chimney CHI. Length LL1 is in the range 3-8 mm, for example 5 mm, and length LL2 is in the range 10-16, for example 13 mm.

[0166] Preferably, the gap GG between chimney CHI and chimney CH2 is in the range 2-8 mm, for example 4 mm.

[0167] The first cyclonic chamber CC1 helps to achieve water re-vaporizing in a three-dimensional way, what benefits space utilization of a steam chamber. Also, spinning movement provides an infinity loop effect creating an equivalent steaming surface that is extremely large for heat transfer when steam flows along it repeatedly, what benefits not only space but also weight efficiency in a steam chamber design. Moreover, making use of centrifugal force to separate water from wet steam is more energy-efficient than using heat to remove water content from wet steam directly Furthermore, by trapping and holding separated and / or excess water on hot surfaces in heated zone to avoid moving towards downstream, more time for interaction is gained for water to steam conversion, what does not straightforward relay on higher net power for better steaming ability, but it allows the steam chamber with lower power to take more time to supply the equivalent amount of energy to steam off this amount of water. This gain in interaction time extends to after-use period when steaming for garment treatment is stopped: once steam flow is stopped, spinning stops, steam thrust and centrifugal force disappear, then, excess water, if any, originally pushed on side walls of both the outer portion and the inner portion, falls down under gravity pull to steam chamber surface below, where excess water can be vaporized soon under heat supplied from heating element. This is the reason why in this preferred embodiment, opening of the inner portion and outlet chimney face down, and heated steam engine main body is preferably at lower place in view of gravity.

[0168] Preferably, as illustrated in the cross-sectional view of embodiments of Figs.2, 5, 8 and 9, the steam channel SC comprises a bottom surface SC BS and a top surface SC TS.

[0169] In Figs.2, 5, 8 and 9, the bottom surface SC BS of the steam channel SC is a sub-portion of the internal surface IP IS of the ironing plate IP, and the top surface SC TS of the steam channel SC is a sub-portion of the intermediate cover ICO covering the internal surface IP IS.

[0170] The steam channel SC comprises: 2024PF00067 02.12.2025

[0171] 18

[0172] - a plurality of protruding ribs PR_B being arranged onto the bottom surface SC BS and extending substantively parallel to the longitudinal axis (x) of the ironing plate IP, and / or

[0173] - a plurality of protruding ribs PR_T being arranged onto the top surface SC TS and extending substantively parallel to the longitudinal axis (x).

[0174] The plurality of protruding ribs PR_B arranged onto the bottom surface SC BS help to absorb thermal heat from steam circulating in the steam channel SC, which in turn will help to transfer heat to the ironing plate IP and then heat-up the ironing plate IP.

[0175] If a plurality of protruding ribs PR_T is also arranged onto the top surface SC TS, this will help to re-heat steam circulating in the steam channel SC, which in turn will also help to transfer heat to the ironing plate IP via heated steam.

[0176] It is noted that the transfer of thermal heat to the ironing plate is primarily done thanks to the plurality of protruding ribs PR_B arranged onto the bottom surface SC BS, and secondarily done thanks to the plurality of protruding ribs PR_T arranged onto the top surface SC TS. Ribs are designed to improve efficiency of the heat transfer by enlarging heat exchange surface area.

[0177] The fact of arranging the plurality of protruding ribs PR_B and PR_T substantively parallel to the longitudinal axis (x) prevent velocity of steam circulating in the steam channel to reduce too significantly due to flow resistance.

[0178] The top illustration of Fig.32 depicts the top surface SC TS of the steam channel SC, while the bottom illustration of Fig.32 depicts the bottom surface SC BS of the steam channel SC.

[0179] The bottom surface SC BS of the steam channel SC forms an overall flat surface being substantially parallel to the planar ironing surface (xy) of the ironing plate IP. The plurality of protruding ribs PR_B arranged onto the bottom surface SC BS protrude from this overall flat surface.

[0180] Preferably, as depicted in Figs.33, 34, 35A, 36 corresponding respectively to cross-section views AA, BB, CC, DD from Fig.32, the top surface SC TS of the steam channel SC is dome-shaped. The dome-shaped top is designed not only to reduce mass of the steam generator SG, but also to create more room for larger steam passage and bigger surface area that steam can interact with. Compared to having a flat top surface SC TS of the steam channel, a dome-shaped top surface TS increases the surface area for thermal exchange with steam circulating in the steam channel. 2024PF00067 02.12.2025

[0181] 19

[0182] Moreover, this dome-shape increases steam passage section area and thus prevents accumulation of scale along the steam channel SC.

[0183] Preferably, the plurality of protruding ribs PR_B arranged onto the bottom surface SC BS of the steam channel SC are arranged in a staggered way relative to the plurality of protruding ribs PR_T arranged onto the top surface SC TS of the steam channel SC.

[0184] As depicted in the top view of Fig.35A, ribs PR_B and PR_T are staggered along axis (y) being perpendicular to the longitudinal axis (x).

[0185] As depicted in the top view of Fig.32, ribs PR_B and PR_T are staggered along the longitudinal axis (x). As depicted in the top view of Fig.32, ribs PR_B and PR_T are staggered along the longitudinal axis (x). For example, in the cross-section view AA of Fig.32, ribs PR_B are protruding at their maximum while ribs PR_T are protruding at their minimum. And in the crosssection view BB of Fig.32, ribs PR_B are protruding at their minimum while ribs PR_T are protruding at their maximum.

[0186] Having ribs arranged in a staggered way allows, thanks to creating a larger surface area of thermal exchange, improving transfer of heat contained in steam circulating in the steam channel, to the ironing plate IP.

[0187] Figs.35B and 35C are zoomed-in views of Fig.35 A.

[0188] The steam generator SG comprises a pair of walls (WW1, WW2) arranged between the internal surface IP IS of the ironing plate IP and the intermediate cover ICO, for fluidly separating the steam channel SC and the steam distribution chamber SDC.

[0189] The pair of walls materializes the fluid separation between the steam channel SC and the steam distribution chamber SDC.

[0190] Because the steam channel is funnel-shaped, the separating walls are also tapered compared to the longitudinal axis (x) of the ironing plate IP.

[0191] As depicted in Fig.35A, a pair of ribs (Rl, R2) protrudes from the intermediate cover ICO, and a pair of grooves (Gl, G2) is formed in the internal surface IP IS of the ironing plate IP. The pair of ribs and the pair of grooves being adapted to cooperate with each other to form the pair 2024PF00067 02.12.2025

[0192] 20 of walls (WW1, WW2). Rib R1 cooperates with groove G1 to form wall WWE Rib R2 cooperates with groove G2 to form wall WW2.

[0193] Alternatively, the pair of ribs could be arranged on the internal surface IP IS, and the pair of grooves could be arranged on the top surface on the intermediate cover ICO.

[0194] Preferably, the pair of ribs (Rl, R2) is symmetrically arranged compared to the longitudinal axis (x) of the ironing plate IP.

[0195] Preferably, the pair of grooves (Gl, G2) is symmetrically arranged compared to the longitudinal axis (x) of the ironing plate IP.

[0196] In order to further improve the fluid separation between the steam channel SC and the steam distribution chamber SDC, thermal paste (not shown) is applied in the pair of grooves (Gl, G2), then cured (i.e. solidified) to ensure a proper sealing. As an alternative to the thermal paste, a gasket can be used.

[0197] Preferably, the pair of walls (WW1, WW2) partially follows the shape of the heating element HE.

[0198] Fig.40 depicts the ironing plate IP on which the pair of grooves (Gl, G2) is arranged.

[0199] Preferably, a plurality of ribs (PR1, PR2) is arranged within the pair of grooves (Gl, G2), as illustrated by the top and bottom zoomed-in views. The plurality of ribs (PR1, PR2) limit the thermal exchange to the ironing plate, which prevents local hot spots on the ironing plate IP.

[0200] The top view of Fig.37 depicts a zoomed-in view of the bottom surface SC BS of the steam channel SC, while the bottom view of Fig.37 depicts a cross-section view EE of the top view of Fig-37.

[0201] Advantageously, the plurality of protruding ribs (PR_B) arranged onto the bottom surface SC BS of the steam channel SC are discontinued along a given axis being parallel to the longitudinal axis (x) of the ironing plate IP. In other words, ribs PR_B do not form one continuous single fin, but a plurality of discontinued fins, for creating a larger surface area of thermal exchange, improving transfer of heat carried by steam circulating in the steam channel, to the ironing plate IP.

[0202] Advantageously, the plurality of protruding ribs PR_T arranged onto the top surface SC TS of the steam channel SC are discontinued along a given axis being parallel to the longitudinal axis (x) of the ironing plate IP. In other words, ribs PR_T do not form one continuous single fin, but a plurality of discontinued fins, for creating a larger surface area of thermal exchange, improving transfer of heat contained in the intermediate cover ICO to the steam, and eventually to the ironing plate IP which is heated by steam. 2024PF00067 02.12.2025

[0203] 21

[0204] Preferably, as illustrated in top view of Fig.37, the plurality of protruding ribs PR_B arranged onto the bottom surface SC BS of the steam channel SC comprise a first subset SI of protruding ribs and a second subset S2 of protruding ribs. The first subset of protruding ribs and the second subset of protruding ribs are arranged in a staggered way with respect to each other along an axis (y) being perpendicular to the longitudinal axis (x).

[0205] This allows greater heat exchange near the steam outlet SC O of the steam channel SC.

[0206] Preferably, the plurality of protruding ribs PR_B arranged onto the bottom surface SC BS and / or the plurality of protruding ribs PR_T arranged onto the top surface SC TS: have a lateral pitch Pl, perpendicularly to the longitudinal axis (x) of the ironing plate IP, being in the range [3 ;5] mm. This is illustrated in bottom view of Fig.33. have a longitudinal pitch P2, along the longitudinal axis (x) of the ironing plate IP, being in the range [5 ;20] mm. This is illustrated in bottom view of Fig.37. have a length LI, along the longitudinal axis (x) of the ironing plate IP, being in the range [2;20] mm. This is illustrated in bottom view of Fig.37. have a width Wl, perpendicularly to the longitudinal axis (x) of the ironing plate IP, being in the range [1 ;3] mm. This is illustrated in bottom view of Fig.33. have a height Hl, compared to the bottom surface SC BS and / or the top surface SC TS, being in the range [1 ;5] mm. This is illustrated in bottom view of Fig.33.

[0207] Preferably, a width W in of the steam channel SC at its steam inlet SC I, is larger than a width W out of the steam channel SC at its steam outlet SC O.

[0208] Width W in and W out are taken in the planar ironing surface (xy) onto the bottom surface SC BS, perpendicularly to the longitudinal axis (x).

[0209] Width W in of the steam channel SC at its steam inlet SC I is illustrated on Figs.33, 34, 35A, while width W out of the steam channel SC at its steam outlet SC O is illustrated on Figs.36.

[0210] Preferably, the ratio between W out and W in is about 0.5.

[0211] For example:

[0212] W_out = 20-25 mm

[0213] W_in = 40-50 mm 2024PF00067 02.12.2025

[0214] 22

[0215] This funnel / tapered shape of the steam channel SC between its steam inlet SC I and its steam outlet SC O allows increasing the speed of steam circulating in the steam channel SC, resulting in that a stronger steam boost can be achieved when steam exits the steam vents SV of the ironing plate IP. This contributes to improving steam perception, which benefits ironing experience.

[0216] Moreover, given the fact that ironing plates are often more narrow at the front area FA than at the rear area RA, this funnel / tapered shape of the steam channel SC can be easily implemented.

[0217] Preferably, the height H_in of the dome-shaped top surface SC TS at the steam inlet SC I of the steam channel SC, and the height H out of the dome-shaped top surface SC TS at the steam outlet SC O of the steam channel SC, are substantively the same.

[0218] For example H_in and H out are in the range 2-8 mm.

[0219] Preferably, as depicted in bottom view of Fig.32, the bottom surface SC BS of the steam channel SC comprises a plurality of protruding dots PR_D arranged at proximity of the steam inlet SC I of the steam channel SC.

[0220] The plurality of protruding dots PR_D helps to increase the surface area of the bottom surface SC BS, at proximity of the steam inlet SC I of the steam channel SC. This allows creating a larger surface area of thermal exchange, improving transfer of heat contained in steam circulating in the steam channel, to the ironing plate IP. Moreover, given the relatively small size of those protruding dots PR_D compared to arranging relatively large size of protruding ribs, this widen the passage for steam to spread from the single steam inlet SC I of the steam channel SC, to the whole inside of the steam channel width with low flow resistance. This also prevents scale accumulation at proximity of the steam inlet SC I.

[0221] Preferably, the plurality of protruding dots PR_D are arranged in a staggered way onto the bottom surface SC BS of the steam channel SC for an even better heat exchange thanks to more interaction with steam circulating thru.

[0222] For example, the protruding dots PR_D have: a pitch in the range [2; 5] mm, a circular base with a diameter of about 1 mm, a height in the range [0.5 ;2] mm 2024PF00067 02.12.2025

[0223] 23

[0224] Preferably, the steam outlet SC O of the steam channel SC is free of dots to prevent scale accumulation.

[0225] Fig.16 depicts an embodiment in which the second cyclonic chamber CC2 comprises a single steam inlet CC2 I fluidly connected to the steam outlet CC1 O of the first cyclonic chamber CC1, and a single steam outlet CC2 O fluidly connected to the steam inlet LP_I of the steam engine SE. In this embodiment, the steam engine SE is a labyrinth pathway, but could also have a different steam engine structure, as the ones detailed previously. The second cyclonic chamber CC2 has a second axis A2 of cyclonic rotation being substantially perpendicular to the longitudinal axis x of the ironing plate IP. The steam flow exiting from the second cyclonic chamber CC2 and entering in the steam engine SE is directed along a direction DI being parallel to the second axis A2 of cyclonic rotation.

[0226] Embodiment of Fig.16 is suitable for certain steam generator with space constraints where only one steam engine (e.g. labyrinth path) can be arranged in.

[0227] Fig.17 depicts an embodiment in which the second cyclonic chamber CC2 comprises a single steam inlet CC2 I fluidly connected to the steam outlet CC1 O of the first cyclonic chamber CC1, and a single steam outlet CC2 O fluidly connected to the steam inlet LP_I of the steam engine SE. In this embodiment, the steam engine SE is a labyrinth pathway, but could also have a different steam engine structure, as the ones detailed previously. The second cyclonic chamber CC2 has a second axis A2 of cyclonic rotation being substantially parallel to the longitudinal axis (x) of the ironing plate IP. The steam flow exiting from the second cyclonic chamber CC2 and entering in the steam engine SE is directed along a direction DD being parallel to the second axis A2 of cyclonic rotation.

[0228] Embodiment of Fig.17 is suitable for certain steam generator with space constraints where only one steam engine (e.g. labyrinth path) can be arranged in.

[0229] Fig.18 depicts an embodiment in which the second cyclonic chamber CC2 comprises: a single steam inlet CC2 I fluidly connected to the steam outlet CC1 O of the first cyclonic chamber CC1, a first steam outlet CC2 O1 fluidly connected to a first steam inlet LP Il of the steam engine, steam engine partly taking the form of a first labyrinth pathway LP1, 2024PF00067 02.12.2025

[0230] 24 a second steam outlet CC2 O2 fluidly connected to a second steam inlet LP I2 of the steam engine SE, steam engine partly taking the form of a second labyrinth pathway (LP2).

[0231] The first labyrinth pathway LP1 and the second labyrinth pathway LP2 extend relative to each other towards a rear area RA of the ironing plate IP, similarly as described along with Fig.15.

[0232] The labyrinth pathways LP1 / LP2 comprises two steam inlets LP Il / LP I2 and two steam outlets LP Ol / LP O2. The two steam outlets LP Ol / LP O2 converge into a single area at the rear area RA of the ironing plate IP, for entering the steam inlet SC I of the steam channel SC.

[0233] The second cyclonic chamber (CC2) has a second axis A2 of cyclonic rotation being substantially perpendicular to the longitudinal axis (x) of the ironing plate IP. The steam flow exiting from the second cyclonic chamber CC2 and entering in the steam engine formed by labyrinths pathways LP1 / LP2 takes two opposite directions: a first direction DI and a second D2 both being substantially parallel to the second axis A2 of cyclonic rotation, direction DI and direction D2 being opposite.

[0234] Preferably, in the embodiment of Fig.18, the second cyclonic chamber CC2 is symmetrically arranged along the longitudinal axis (x) of the ironing plate, and its steam inlet CC2 I is aligned along the longitudinal axis (x).

[0235] The embodiment of Fig.18 allows better space utilization by separating the steam flow into two paths to cover heated area more efficiently and more effectively.

[0236] Fig.19 depicts an alternative of the embodiment depicted in Fig.18. In this alternative embodiment, the first cyclonic chamber CC1 is omitted, and input steam flow Fl received at the steam input IN directly enters the steam inlet CC2 I of the second cyclonic chamber CC2.

[0237] This embodiment is advantageous for a low-cost implementation, and may achieve similar performance of the embodiment of Fig.18, as long as the cyclonic effect of CC2 can compensate the absence of cyclonic effect of CC1.

[0238] Preferably, as according to embodiments depicted by Figs. 16, 17, the second cyclonic chamber CC2 has a second axis A2 of cyclonic rotation being substantially parallel to the planar ironing surface (xy).

[0239] Fig.20 depicts a partial zoomed-in three-dimensional cross-sectional view of the second cyclonic chamber CC2 along the longitudinal axis (x) of the ironing plate IP, according to embodiments 2024PF00067 02.12.2025

[0240] 25 depicted in Fig.16, 18 and 19. Steam exiting from the first cyclonic chamber CC1 via its steam outlet CC1 O, is carried along the steam channel CHA, which channel CHA is fluidly connected to the steam inlet CC2 I of the second cyclonic chamber CC2.

[0241] Fig.21 depicts the second cyclonic chamber CC2 according to embodiments depicted in Fig.18 and 19, but along a vertical cross-sectional view perpendicular to the longitudinal axis (x). This illustrates the two opposite directions DI and D2 taken by steam exiting the second cyclonic chamber CC2, and entering the two steam inlets LP I1 / LP I2 (not shown) of the labyrinth pathways LP1 / LP2 (not shown).

[0242] Alternatively, according to embodiment depicted by Fig.22, the second cyclonic chamber CC2 has a second axis of cyclonic rotation being substantially perpendicular to the planar ironing surface (xy). In this embodiment, contrary to the embodiment of Fig.18, steam exiting the second cyclonic chamber CC2 is not split into two opposite steam flows but only one steam flow. This is thus advantageous that the steam engine takes the form of a single labyrinth pathway LP having a single steam inlet LP_I.

[0243] Preferably, as depicted in Fig.9, the steam generator SG further comprises a third cyclonic chamber CC3. The third cyclonic chamber comprises at least one steam inlet CC3 I1 and a steam outlet CC3 O. The third cyclonic chamber acts as a fluid separator. The at least one inlet steam of the third cyclonic chamber is fluidly connected to the at least one steam outlet SE O of the steam engine. The steam outlet of the third cyclonic chamber is fluidly connected to the steam inlet SC I of the steam channel SC.

[0244] Compared to the embodiment depicted in Fig.5, this means that the third cyclonic chamber CC3 has been fluidly arranged / connected between the steam engine and the steam channel SC.

[0245] The third cyclonic chamber CC3 allows separating water contained in steam exiting from the steam engine, the steam engine taking the form in this embodiment of a labyrinth pathway LP. The third cyclonic chamber CC3 is also heated by the heating element HE so that water droplets separated by the centrifugal force are vaporized.

[0246] Steam exiting the steam outlet LP_O of the labyrinth pathway LP enters the at least one steam inlet CC3 I1 of the third cyclonic chamber CC3.

[0247] Steam exiting the steam outlet CC3 O of the third cyclonic chamber CC3 enters the steam inlet SC I of the steam channel SC. 2024PF00067 02.12.2025

[0248] 26

[0249] Preferably, the embodiment depicted in Fig.22 further comprises a similar third cyclonic chamber CC3 being fluidly arranged / connected between the steam engine LP and the steam channel (SC). This is depicted in the embodiment of Fig.23. The third cyclonic chamber CC3 plays the same role as described along with embodiment of Fig.9.

[0250] Fig.24 depicts an alternative of the embodiment depicted in Fig.18. This alternative embodiment further comprises an additional cyclonic chamber same as the third cyclonic chamber CC3 being fluidly arranged / connected between the steam engine and the steam channel SC. The third cyclonic chamber CC3 plays the same role as described along with embodiment of Fig.9.

[0251] The third cyclonic chamber CC3 allows separating water contained in steam exiting from the steam engine, the steam engine taking the form in this embodiment of a first labyrinth pathway LP1 and a second labyrinth pathway LP2. The third cyclonic chamber CC3 is also heated by the heating element HE so that water droplets separated by the centrifugal force are vaporized.

[0252] Steam exiting the steam outlet LP Ol of the first labyrinth pathway LP1 enters the first steam inlet CC3 I1 of the third cyclonic chamber CC3.

[0253] Steam exiting the steam outlet LP O2 of the second labyrinth pathway LP2 enters the second steam inlet CC3 I2 of the third cyclonic chamber CC3.

[0254] Steam entering via the first steam inlet CC3 I1 and the second steam inlet CC3 I2 are combined / merged into a single steam flow exiting at the steam outlet CC3 O of the third cyclonic chamber CC3.

[0255] Steam exiting the steam outlet CC3 O of the third cyclonic chamber CC3 enters the steam inlet SC I of the steam channel SC.

[0256] Fig.25 represents a three-dimensional external view of the embodiment of Fig.24.

[0257] Fig.26 represents a three-dimensional external and partial internal view of the embodiment of Fig-25.

[0258] Fig.27 represents a three-dimensional exploded view of the embodiment of Fig.25.

[0259] Fig.28 represents a two-dimensional cross-sectional view of the embodiment of Fig.25 along longitudinal axis (x). 2024PF00067 02.12.2025

[0260] 27

[0261] Figs.38A and 38B depict two zoomed-in views of the of the embodiment of Fig.27, in particular showing the first labyrinth pathway LP1, the second labyrinth pathway LP2, and the third cyclonic chamber CC3. Fig.38A is a three-dimensional view, while Fig.38B is atop planar view.

[0262] Preferably, as illustrated in Figs.9, 26 and 28, the third cyclonic chamber CC3 has a third axis A3 of cyclonic rotation being substantially perpendicular to the planar ironing surface (xy).

[0263] Fig.39A depicts a top view of the third cyclonic chamber CC3, while Fig.39B depicts a vertical cross-sectional view of Fig.39A along axis HH.

[0264] In this preferred embodiment, at least one compartment COMP1 and COMP2 are arranged next to the third cyclonic chamber CC3, in fluid communication with the inside of the third cyclonic chamber CC3. In this example, a first compartment COMP1 and a second compartment COMP2 are diametrically arranged compared to the third axis A3 of cyclonic rotation.

[0265] Each compartment has a close-end at its lower portion, while the open-end of which is at its upper portion where it is locally connected to upper-outer portion of the third cyclonic chamber. The connection opening between them is located closer to the steam outlet CC3 O, where it is far from steam inlet.

[0266] As per cyclone steam chamber working mechanism described earlier, water is separated from wet steam and pushed onto side wall under centrifugal force, what is also applicable to other small particles in steam, for example scale flakes, which is residue after water is steamed off.

[0267] As illustrated in Fig.39B, these small particles, together with excess water, move circularly towards steam outlet alongside wall of the cyclone steam chamber. When they reach the upper portion where the connection opening of the compartment is located, these small particles, as well as remaining water if not yet fully vaporized, run cross the opening under centrifugal force, then, fall into the compartment COMP1 and COMP2 under gravity and push from following particles, meanwhile, dry steam, vapor with very low mass, keeps spinning and exits via steam outlet eventually.

[0268] Since the compartments COMP1 and COMP2 are closed at their lower end, particles entering compartments COMP1 and COMP2 are trapped, where water is vaporized under heat and small particles are stored, so that steam leaving this cyclone steam chamber is drier and cleaner.

[0269] Fig.29 depicts an alternative of the embodiment depicted in Fig.24. In this alternative embodiment, the second cyclonic chamber CC2 is replaced by two separate cyclonic chambers CC2 A and CC2 B. steam exiting from the first cyclonic chamber CC1 by its steam outlet 2024PF00067 02.12.2025

[0270] 28

[0271] CC1 O is split into two separate steam flows, a first steam flow entering the steam inlet CC2 I1 of cyclonic chambers CC2 A, a second steam flow entering the steam inlet CC2 I2 of cyclonic chambers CC2 B. The two separate cyclonic chambers CC2 A and CC2 B have a same second axis A2 of cyclonic rotation being substantially parallel to the planar ironing surface (xy) of the ironing plate IP. In this embodiment, the second axis A2 of cyclonic rotation is substantially perpendicular to the longitudinal axis (x) of the ironing plate IP.

[0272] Fig.30 depicts a three-dimensional view of an alternative of the embodiment depicted in Fig.29. In this alternative embodiment, the two separate cyclonic chambers CC2 A and CC2 B have separate axis of cyclonic rotation.

[0273] The cyclonic chambers CC2 A has an axis A2a of cyclonic rotation being substantially parallel to the planar ironing surface (xy) of the ironing plate IP, and substantially parallel to the longitudinal axis (x) of the ironing plate IP.

[0274] The cyclonic chambers CC2 B has an axis A2b of cyclonic rotation being substantially parallel to the planar ironing surface (xy) of the ironing plate IP, and substantially parallel to the longitudinal axis (x) of the ironing plate IP.

[0275] Fig.31 depicts a three-dimensional internal view of the embodiment of Fig.30.

[0276] Embodiment of Fig.30 enables design freedom to use separate cyclonic chambers (similar as CC2 A or CC2 B) to improve space utilization.

[0277] Fig.41 depicts a garment care device 100 according to the invention.

[0278] The garment care device 100 comprises a base 101, a handheld unit 102, a hose cord 103 fluidly connecting the base and the handheld steamer.

[0279] The handheld unit may also be referred to as a steamer head or as an iron head.

[0280] The base 101 comprises a water tank 104, a water pump 105, a boiler 106 for generating steam. The water pump is activated by a control unit (not shown) arranged in the base for pumping water from the water tank into the boiler.

[0281] Steam generated by the boiler 106 is carried in the hose cord 103 to the handheld unit 102.

[0282] The handheld unit 102 comprises a steam generator SG according to the invention described previously along the various embodiments according to the invention.

[0283] The steam input IN of the steam generator SG is fluidly connected to the hose cord for receiving steam carried by the hose cord 103. 2024PF00067 02.12.2025

[0284] 29

[0285] The base 101 comprises an electro-valve 107 fluidly arranged downstream a steam outlet of the boiler 106. When the electro-valve 107 is closed, steam generated by the boiler 106 cannot enter the hose cord and as a result cannot be carried to the handheld unit. When the electro-valve 107 is opened, steam generated by the boiler 106 can enter the hose cord and as a result can be carried to the handheld unit.

[0286] The handheld unit comprises a steam trigger 108. When a user of the handheld unit 102 actuates the steam trigger, a signal is generated and sent (via an electrical wire embedded in the hose cord, not shown) to the control unit arranged in the base. Then, the control unit sends a subsequent signal to the electro-valve 107 to set the electro-valve 107 in its open state. As a result, steam generated by the boiler 106 can enter the hose cord 103, and reach the steam input IN of the steam generator SG.

[0287] The above embodiments as described are only illustrative, and not intended to limit the technique approaches of the present invention. Although the present invention is described in details referring to the preferable embodiments, those skilled in the art will understand that the technique approaches of the present invention can be modified or equally displaced without departing from the protective scope of the claims of the present invention. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. Any reference signs in the claims should not be construed as limiting the scope.

Claims

2024PF00067 02.12.202530CLAIMS1. A steam generator (SG) comprising:- an ironing plate (IP) comprising at least one steam vent (SV), the ironing plate defining a planar ironing surface (xy),- a steam input (IN) for receiving an input steam flow (Fl),- a first cyclonic chamber (CC1),- a second chamber (CC2, CC2A, CC2B) comprising at least one steam inlet (CC2_I, CC2_I1, CC2_I2) and at least one steam outlet (CC2_O, CC2_O1, CC2_O2), wherein the at least one steam inlet of the second chamber being fluidly connected to the steam input and the at least one steam outlet of the second cyclonic chamber being fluidly connected to the at least one steam vent characterized in that the second chamber is a second cyclonic chamber acting as a fluid separator, the second cyclonic chamber having a second axis of cyclonic rotation being substantially parallel to the planar ironing surface (xy).

2. Steam generator as claimed in claims 1, wherein the second cyclonic chamber (CC2) forms:- a single cyclonic chamber (CC2) having one steam inlet (CC2 I), and two steam outlets (CC2 O1, CC2 O2) to direct two output steam flows in two opposite directions (DI, D2) being substantially perpendicular to a longitudinal axis (x) of the ironing plate (IP).

3. Steam generator as claimed in claims 1, wherein the second cyclonic chamber (CC2) forms: a single cyclonic chamber (CC2) having one steam inlet (CC2 I), and one steam outlet (CC2 O) to direct output steam flow in a direction (DI) being substantially perpendicular or parallel to the longitudinal axis (x), or- two separate cyclonic chambers (CC2A, CC2B) having two steam inlets (CC2_I1, CC2 I2), and two steam outlets (CC2 O1, CC2 O2) to direct two output steam flows in two directions (DI, D2, A2a, A2b) being substantially perpendicular or parallel to the longitudinal axis (x).

4. Steam generator as claimed in any one of the preceding claims, wherein:- the optional first cyclonic chamber is a first cyclonic chamber (CC1) being fluidly arranged between the steam input (IN) and the second cyclonic chamber (CC2, CC2A,2024PF00067 02.12.202531CC2B), the first cyclonic chamber comprising a steam inlet (CC1 I) fluidly connected to the steam input (IN), the first cyclonic chamber comprising a steam outlet (CC1 O) fluidly connected to the at least one steam inlet (CC2 I, CC2 I1, CC2 I2) of the second cyclonic chamber, the first cyclonic chamber acting as a fluid separator.

5. Steam generator as claimed in claims 4, wherein the first cyclonic chamber (CC1) comprises a first axis (Al) of cyclonic rotation being:- substantially perpendicular to the planar ironing surface (xy), or- substantially parallel to the planar ironing surface (xy).

6. Steam generator as claimed in claims 4, wherein the first cyclonic chamber (CC1) comprises a first chimney (CHI) and a second chimney (CH2) both being arranged coaxially around the steam outlet (CC1 O) of the first cyclonic chamber.

7. Steam generator as claimed in any one of the preceding claims, further comprising a steam engine (SE) comprising at least one steam inlet (SE I, LP_I, LP Il, LP I2) and at least one steam outlet (SE O, LP_O, LP Ol, LP O2), the at least one steam inlet of the steam engine being fluidly connected to the at least one steam outlet (CC2 O, CC2 O1, CC2 O2) of the second cyclonic chamber (CC2, CC2A, CC2B).

8. Steam generator as claimed in claim 7, wherein the steam engine (SE) forms a labyrinth pathway (LP).

9. Steam generator as claimed in claim 8, wherein the labyrinth pathway (LP) comprises:- a first labyrinth pathway (LP1) comprising a first steam inlet (LP Il) fluidly connected to one outlet (CC2 O1) of the at least one steam outlet (CC2 O, CC2 O1, CC2 O2) of the second cyclonic chamber (CC2),- a second labyrinth pathway (LP2) comprising a second steam inlet (LP I2) fluidly connected to another outlet (CC2 O2) of one of the at least one steam outlet (CC2 O, CC2_O1, CC2_O2) of the second cyclonic chamber (CC2), the first labyrinth pathway and the second labyrinth pathway extending relative to each other towards a rear area (RA) of the ironing plate (IP).2024PF00067 02.12.20253210. Steam generator as claimed in claim 7 when depending on claim 4, further comprising a heating element (HE) arranged adjacent to the first cyclonic chamber (CC1) and the steam engine (SE), the first cyclonic chamber (CC1) being arranged adjacent to a bending portion (BP) of the heating element.

11. Steam generator as claimed in claim 7, wherein the ironing plate (IP) comprises: an external surface (IP ES) intended to get into contact with a garment, and an internal surface (EP IS) opposite said external surface, a steam channel (SC) extending between said internal surface and an intermediate cover (ICO), the steam channel comprising a steam inlet (SC I) and a steam outlet (SC O), the steam inlet of the steam channel being fluidly connected to the at least one steam outlet (SE O, LP_O, LP Ol, LP O2) of the steam engine (SE), a steam distribution chamber (SDC) extending between said internal surface and said intermediate cover, the steam distribution chamber being fluidly connected to the steam outlet of the steam channel for distributing steam received from the steam channel towards the at least one steam vent (SV) of the ironing plate.

12. Steam generator as claimed in claim 11, wherein the steam channel (SC) comprises a bottom surface (SC BS) and a top surface (SC TS),- a plurality of protruding ribs (PR_B) being arranged onto the bottom surface (SC BS) and extending substantively parallel to a longitudinal axis (x) of the ironing plate (IP), and / or- a plurality of protruding ribs (PR_T) being arranged onto the top surface (SC TS) and extending substantively parallel to the longitudinal axis.

13. Steam generator as claimed in claim 11 when depending on claim 7, further comprising a third cyclonic chamber (CC3) comprising at least one steam inlet (CC3 I1, CC3 I2) and a steam outlet (CC3 O), the third cyclonic chamber acting as a fluid separator, the steam inlet of the third cyclonic chamber being fluidly connected to the at least one steam outlet (SE O, LP_O, LP Ol, LP O2) of the steam engine (SE), the steam outlet of the third cyclonic chamber being fluidly connected to the steam inlet (SC I) of the steam channel (SC).2024PF00067 02.12.20253314. Steam generator as claimed in claims 13, wherein the third cyclonic chamber (CC3) has a third axis (A3) of cyclonic rotation being substantially perpendicular to the planar ironing surface (xy).

15. Garment care device (100) comprising a base (101), a handheld unit (102), a hose cord (103) fluidly connecting the base and the handheld steamer,- the base comprising a boiler (106) for generating steam, steam generated by the boiler being carried in the hose cord to the handheld unit,- the handheld unit comprising a steam generator (SG) as claimed in any one of the preceding claims, the steam input (IN) of the steam generator being fluidly connected to the hose cord for receiving steam carried by the hose cord.

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