Ironing device

Abstract

Ironing device (1) with a portable housing (10) comprising a handle (4) and an ironing head (2) connected to the handle (4), the portable housing (10) further comprising:-a steam circuit comprising a steam generator (61); -an air suction circuit extending between the at least one suction hole (22) and the at least one suction air outlet hole and comprising a fan (21) driven in rotation by a motor (23), the fan (21) and the motor (23) being arranged in the screed head (2); wherein the screed head (2) comprises a treatment face (20) facing a piece of fabric to be ironed, the treatment face (20) comprising at least one steam outlet hole (24) connected to a steam circuit and at least one suction hole (22) forming a suction air inlet of an air suction circuit, characterized in that the screed head (2) comprises an air cooling circuit (23) for a motor, an air cooling circuit extends between at least one cooling air inlet aperture and at least one cooling air outlet aperture provided in the screed head (2), the cooling circuit being separate and distinct from the air suction circuit.

Description

Technical Field

[0001] The present invention relates to the field of small household appliances, and more precisely to ironing devices. Background Art

[0002] In order to iron clothes, an iron is usually used. Due to the limitations of the use of irons (for example, an ironing board is required), portable ironing devices that do not require the aid of an ironing board and are convenient and quick to use have been developed. These devices are generally called "steam ironers" or "steam irons". When clothes are hung on a hanger, the ironing device irons by applying a hot ironing surface to the clothes, combined with the release of steam. The ironing device allows clothes to be ironed under the condition of correct use.

[0003] In practice it has been noticed that the user does not stretch the clothes sufficiently and does not press the ironing surface sufficiently against the clothes, so that the action of the device is limited. As a result, the clothes are not ironed as well as when the device is used correctly. Therefore, ironing devices have been proposed that, in addition to heating the clothes and releasing steam, also extract the clothes. These improved devices require a motor to achieve the extraction, which can overheat. Summary of the invention

[0004] One object of the present invention is to propose an ironing device, preferably a portable one, which integrates suction technology and is optimized to avoid any damage to the device due to its operation.

[0005] According to a first aspect, an ironing device is provided having a portable housing, the portable housing comprising a handle and an ironing head connected to the handle, the portable housing further comprising:

[0006] - a steam circuit comprising a steam generator;

[0007] an air suction circuit extending between at least one suction opening and at least one suction air outlet opening and comprising a fan driven in rotation by a motor, the fan and the motor being arranged in the ironing head;

[0008] wherein the ironing head comprises a treatment surface facing the piece of fabric to be ironed, the treatment surface comprising at least one steam outlet opening connected to a steam circuit and at least one suction opening forming a suction air inlet of an air suction circuit,

[0009] Characterized in that the ironing head comprises an air cooling circuit for the motor, extending between at least one cooling air inlet opening and at least one cooling air outlet opening provided in the ironing head, the cooling circuit being separate and distinct from the air suction circuit.

[0010] According to the advantageous and non-limiting features considered individually or in any combination:

[0011] - The shape of the handle is suitable for holding with one hand and allowing the device to be moved towards the piece of fabric to be ironed. Advantageously, the handle has an elongated shape and has a circumference of less than 20 cm.

[0012] The ironing device has a weight of less than 2 kg, preferably less than 1.5 kg.

[0013] - the cooling circuit comprises a propeller rotatably mounted so as to cause air entering through the cooling air inlet opening to flow to the cooling air outlet opening;

[0014] - The propeller is axial, helical or centrifugal;

[0015] - the motor extends longitudinally along the axis from a first end to a second end, the first end being closer to the treatment surface than the second end, and wherein the propeller is arranged at the second end of the motor;

[0016] - the ironing head comprises a rear surface opposite the treatment surface and a side surface extending between the treatment surface and the rear surface, wherein cooling air inlet holes are provided at the side surface and cooling air outlet holes are provided at the rear surface;

[0017] - the air suction circuit comprises at least one suction air outlet opening arranged at the rear surface;

[0018] - the at least one cooling air outlet opening of the cooling circuit opens into the air suction circuit at the suction air outlet opening of the air suction circuit;

[0019] - the cooling circuit comprises a plurality of cooling air inlet openings and / or a plurality of cooling air outlet openings;

[0020] - the portable housing comprises a receiving part, the receiving part comprising an inner wall defining a cavity in which the motor is arranged, the receiving part further comprising blades extending from the inner wall so as to form, on the one hand, at least one suction air flow channel between the at least one air suction hole and the suction air outlet, and, on the other hand, at least one cooling duct to allow cooling air entering through the at least one cooling air inlet hole to flow into the cavity;

[0021] - each blade is hollow so as to define at least one cooling duct;

[0022] - at least one suction air flow channel is defined between two blades;

[0023] - each blade has a curved shape for rectifying the suction air flowing between the at least one air suction hole and the suction air outlet hole;

[0024] - the air suction circuit and the cooling circuit are designed so that the suction air flows in a direction orthogonal to the cooling air flow direction at the fabric sheet;

[0025] - the portable housing comprises a base connected to the lower end of the handle, the steam generator being arranged in the base;

[0026] - the steam circuit comprises a liquid reservoir and a pump, the pump being arranged so that liquid flows from the liquid reservoir to the steam generator, the liquid reservoir and the pump being arranged in the base;

[0027] The base comprises a flat outer surface designed to place the device on a substantially flat surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features and advantages of the present invention will become apparent by reading the following description of preferred embodiments. This description will be given with reference to the accompanying drawings, in which:

[0029] - Figure 1 An ironing device according to a particular embodiment is shown;

[0030] - Figure 2 is a side sectional view of the ironing device;

[0031] - Figure 3 is a top sectional view of the ironing device;

[0032] - Figure 4 is a second cross-sectional view of the ironing device;

[0033] - Figure 5 is a top view of the ironing device, schematically showing the air flow

[0034] - Figure 6 is a side view of the ironing device;

[0035] - Figure 7 is along Figure 6 Part of a CC section view of an ironing device in the section shown. DETAILED DESCRIPTION

[0036] It should be noted that in this document, the terms "vertical", "lower", "upper", "front" and "rear" used to describe the ironing device refer to the device when it is lying flat on its base.

[0037] Figure 1 An ironing device 1 is shown having a portable housing 10, which comprises a handle 4 on which an ironing head 2 is arranged, the ironing head comprising a treatment surface 20 facing the piece of fabric to be ironed. The side of the portable housing 10 on which the treatment surface 20 is arranged corresponds to the front of the portable housing 10.

[0038] The ironing device is characterized in that it also comprises a base 6 in extension of the handle 4 on the opposite side of the ironing head 2 .

[0039] See also Figure 2 and Figure 3 The portable housing 10 further comprises an air suction circuit comprising a fan 21 which is driven in rotation by a motor 23 and comprises at least one suction air outlet hole 201. The fan 21 and the motor 23 are preferably arranged in the ironing head 2.

[0040] The portable housing 10 further comprises a steam circuit with a steam generator 61. Such a steam generator 61 is preferably arranged in the base 6.

[0041] The steam circuit is adapted to allow steam to be exhausted at the treatment surface 20 , and the air suction circuit is adapted to allow air to be sucked at the treatment surface 20 .

[0042] Preferably, the portable housing is made of plastic material. For example, the portable housing can be made of polypropylene or polycarbonate.

[0043] As the name implies, the housing is portable. It is therefore designed to be carried by an individual and the device is designed to be manipulated with one hand, in particular by being held by the handle 4.

[0044] The portable housing 10 preferably comprises control means 8 (e.g. in the form of buttons) configured to control steam discharge and air extraction. The control means 8 are preferably arranged on the handle 4. These control means 8 are preferably designed to be actuated by the hand of the user carrying the portable housing of the ironing device.

[0045] Furthermore, the handle 4 is designed to accommodate an electrical cable, for example for supplying power to the electric motor 23 .

[0046] The handle 4 preferably has a mass of approximately 50 grams.

[0047] The base 6 includes a flat outer surface 60 which is designed to Figure 4 In the so-called rest position shown, the device rests on a substantially flat surface S. This surface 60 is preferably the distal surface of the base 6 .

[0048] When the device 1 is in its rest position, the longitudinal axis P of the handle 4 (eg Figure 4 Specifically, the portable housing 10 is configured such that the longitudinal axis P forms a non-zero angle, such as about 15°, with an axis perpendicular to the outer surface 60 (corresponding to the parking surface S of the device).

[0049] According to another embodiment, the longitudinal axis P of the handle 4 is perpendicular to the outer surface 60 .

[0050] Preferably, the base 6 has a rear surface provided with a button allowing the device to be powered on.

[0051] Preferably, the base 6 also includes a power cord allowing it to be connected to the domestic electrical network. The cord may be detachable.

[0052] The length of the wire is preferably greater than 200 cm. When the user brings the device 1 to a height of about 1.5 meters above the ground, the mass of the wire is preferably about 150 grams.

[0053] According to an embodiment not shown, the ironing device 1 does not comprise a base 6. Thus, the power button may be arranged, for example, on the portable housing 10, more precisely on the ironing head 2. Likewise, an electrical wire may be connected to the portable housing 10, more precisely to the ironing head 2.

[0054] The ironing device 1 preferably comprises a steam generator 61 forming part of a steam circuit. The steam generator 61 is adapted to generate steam from a liquid from a reservoir 62. The steam generator 61 defines a cavity for receiving the liquid and preferably comprises at least one shielded heating element 65 allowing the liquid from the reservoir 62 to be heated in the cavity. The steam generator 61 is preferably connected to a conduit 41 of the steam circuit, which is arranged to allow steam to flow from the steam generator 61 to the ironing head 2.

[0055] The steam generator 61 is generally made of a metal body, such as aluminum, and preferably has a mass of about 250 grams. This mass generally includes the mass of the aluminum structure, the shielding heating element 65, the electrical safety and thermal regulation elements, and the mass of the concentrator preferably included in the steam generator 61.

[0056] The reservoir 62 is preferably included in the portable housing 10 and arranged in the base 6. According to an embodiment not shown, the reservoir 62 is removable.

[0057] according to Figure 2 In the illustrated embodiment, the reservoir 62 is disposed in the front portion of the portable housing 10 , or more specifically in the front portion of the base 6 .

[0058] The reservoir 62 preferably comprises a transparent envelope defining the outer wall of the reservoir 62, the transparent envelope being provided with a removable plug 620 allowing filling of the reservoir 62. The reservoir 62 is suitable for containing a liquid, typically water or a liquid solution diluted in water.

[0059] The reservoir 62 preferably has a capacity of about 100 mL. When empty, the reservoir preferably has a mass of about 50 grams. For example, when the reservoir 62 contains about 100 grams of water and is therefore 100% filled, it has a mass of about 150 grams.

[0060] It is also preferred that the steam circuit comprises a pump 63 arranged to cause the liquid to flow from the reservoir 62 to the steam generator 61 , and that the pump 63 is advantageously arranged in the base 6 .

[0061] The pump 63 preferably has a mass of approximately 50 grams.

[0062] according to Figure 2 In one possible embodiment shown, the steam generator 61 , the liquid reservoir 62 and the pump 63 are included in the portable housing 10 , more precisely in the base 6 .

[0063] According to another embodiment not shown, the steam generator 61, the reservoir 62 and the pump 63 are not included in the portable housing 10, but in a base offset relative to the portable housing 10. The base is preferably connected to the portable housing 10 by a flexible conduit that allows steam to flow from the steam generator 61 to the ironing head 2.

[0064] The ironing head 2 is connected to the upper end of the handle 4, and the base 6 is connected to the lower end of the handle 4 opposite to the upper end. Figure 1 In the illustrated embodiment, the lower portion of the handle 4 has a flared shape, the cross section of which gradually increases as it approaches the base 6 .

[0065] The ironing head 2 comprises a front end provided with a treatment surface 20 facing the piece of fabric to be ironed. The ironing head 2 also preferably has a rear end opposite to the front end and provided with a rear surface opposite to the treatment surface 20. Furthermore, the ironing head 2 preferably has a side surface extending between the rear surface and the treatment surface 20.

[0066] The treatment surface 20 preferably comprises a treatment plate 200, preferably a treatment plate 200 of metal, for example aluminium.

[0067] The treatment plate 200 may be, for example, a heating plate 200 for improving ironing, as described below. Such a heating plate 200 may be heated by one or more heating elements 26 arranged in the ironing head close to the treatment surface 20.

[0068] The treatment face 20 comprises at least one steam outlet opening 24 connected to a steam circuit and at least one suction opening 22 connected to an air suction circuit.

[0069] The treatment surface 20 may have different shapes, such as rectangular or triangular. Preferably, it comprises a plurality of steam outlet holes 24 and a plurality of suction holes 22.

[0070] The various steam outlet openings and suction openings may take the form of holes or slots. Figure 1 In the example shown, the steam outlet openings 24 are in the form of holes and the suction openings 22 are in the form of slots.

[0071] Advantageously, the secondary steam generator 25 is arranged in the ironing head 2. The secondary steam generator 25 constitutes part of the steam circuit. The secondary steam generator 25 is preferably connected to the duct 41. In fact, the secondary steam generator 25 allows the liquid from the steam generator 61 (called "primary steam generator") to be evaporated again, which has flowed in the duct 41. In fact, when the steam flows in the duct 41, the steam can be cooled to the extent that a part of the steam condenses. Therefore, the steam condensate flows to the secondary steam generator 25. The secondary steam generator 25 preferably allows evaporation of these condensates so that no liquid is discharged via the steam outlet hole 24. It is particularly advantageous to avoid liquid discharge via the steam outlet hole 24, because this will wet the processed fabric piece and not allow it to be well ironed. In order to evaporate the condensate, the secondary steam generator 25 preferably includes at least one PTC thermistor type heating element 26 or a shielded heating element. The secondary steam generator 25 can also be called an "evaporator" because it allows the steam generated by the steam generator 61 to be heated again.

[0072] Preferably, the heating element 26 of the secondary steam generator 25 is in thermal contact with the treatment surface 20. Therefore, the treatment surface 20, preferably more precisely the heating plate 200, can be heated by one or more heating elements 26 of the secondary steam generator 25, which allows more effective ironing when the treatment surface 20 is arranged facing the fabric piece.

[0073] According to an embodiment not shown, the silicone component is placed between the heating element 26 of the secondary steam generator 25 and the treatment surface 20 so that the temperature of the treatment surface 20 does not exceed a certain temperature threshold, typically 150°C.

[0074] The secondary steam generator 25 is generally made of a metal body, such as aluminum.

[0075] The secondary steam generator 25 also preferably includes electrical safety and thermal regulation elements.

[0076] Thus, the assembly including the treatment surface 20 and the secondary steam generator 25 preferably has a mass of approximately 100 grams.

[0077] The ironing head 2 comprises an air suction circuit extending between the suction hole 22 and the suction air outlet hole 201. The suction air in the air suction circuit flows in Figure 5 The air suction circuit also includes a fan 21 and a motor 23. The fan 21 and the motor 23 are arranged in the ironing head 2.

[0078] Preferably, the motor 23 is arranged inside the ironing head 2 in the axial extension of the treatment surface 20. Figure 4A longitudinal axis M is shown extending.

[0079] like Figure 4 As shown, the ironing head 2 has an elongated shape extending transversely to the handle 4, preferably forming an angle α of about 65° with respect to the longitudinal axis P of the handle. Preferably, the handle 4 extends along an axis passing through at least a part of the motor 23. The axes P and M advantageously intersect.

[0080] The motor 23 is adapted to drive the fan 21 to rotate. The fan 21 constituting a part of the air suction circuit allows air to be sucked from the air suction holes 22.

[0081] The assembly comprising the motor 23 and the fan 21 preferably has a mass of approximately 300 grams.

[0082] Preferably, the air suction circuit is configured to allow more than 10m 3 / h and less than 60m 3 The air suction flow rate is preferably greater than 20 m / h. 3 / h and less than 50m 3 / h air suction flow rate.

[0083] The suction air outlet hole 201 is preferably arranged at the rear surface. "Rear surface" should be understood as the suction air outlet hole 201 being arranged on the rear surface or on the side surface close to the rear surface. If the suction air outlet hole 201 is arranged on the side surface, it is preferably arranged at a distance less than 9 cm from the rear surface.

[0084] The ironing head 2 comprises an air cooling circuit for the motor 23, which extends between at least one cooling air inlet opening 203 and at least one cooling air outlet opening 202 provided in the ironing head 2. The cooling air in the cooling circuit flows in Figure 5 The air cooling circuit for the motor 23 is intended to allow cooling of the motor 23, which generates heat when it is in operation. If the motor 23 reaches a certain critical temperature threshold, it may fail and it is therefore desirable to cool it. Preferably, the ironing head 2 comprises at least two main cooling air inlet holes 203 and at least two cooling air outlet holes 202.

[0085] like Figure 5 As shown, the cooling circuit is separate and distinct from the air extraction circuit. According to this advantageous arrangement, the motor 23 is effectively cooled while avoiding any damage to the motor caused by the air containing steam flowing in the motor.

[0086] like Figure 5As shown, the cooling air inlet hole 203 is preferably arranged on the side surface of the ironing head 2. It is also preferred that the cooling air outlet hole 202 is arranged at the rear surface. If the cooling air outlet hole 202 is arranged on the side surface, it is preferably arranged at a distance of less than 8 cm from the rear surface. It is also preferred that it is preferably arranged at a distance of more than 1 cm from the rear surface.

[0087] According to an embodiment not shown, the cooling air outlet opening 202 of the cooling circuit opens into the air suction circuit at the suction air outlet opening 201 of the air suction circuit. “At the suction air outlet opening” is to be understood as the cooling air outlet opening 202 being arranged in the vicinity of the suction air outlet opening 201, for example at a distance of less than 2 cm from the suction air outlet opening 201. This allows the creation of a Venturi effect and an increase in the flow velocity of the suction air and the cooling air (thereby optimizing the cooling within the device).

[0088] Advantageously, if Figure 3 As shown, the cooling circuit also includes a propeller 27 that is rotatably mounted to cause the air entering through the cooling air inlet opening 203 to flow toward the cooling air outlet opening 202. The propeller 27 allows the air to flow along the cooling air outlet opening 202. Figure 5 The path shown by the dashed arrows guides the air. The propeller 27 can be axial, helical centrifugal or centrifugal.

[0089] The propeller 27 can be arranged in different positions relative to the motor 23. The motor 23 extends longitudinally from a first end to a second end along an axis. The first end is closer to the processing surface 20 than the second end. The propeller 27 can be arranged, for example, at the first end or the second end of the motor 23, in other words, in front of or behind the motor. However, it is preferred that the propeller is located at the rear of the motor 23, which particularly allows to optimize the airflow flowing in the cooling circuit. In particular, positioning the propeller at the rear of the motor 23 allows to limit the pressure drop.

[0090] Preferably, the portable housing 10 comprises a receiving part 29, which comprises an inner wall defining a cavity, in which the motor 23 is arranged. Therefore, the receiving part 29 is preferably included in the ironing head 2. Figure 7 It is shown in FIG. 1 , which represents a portion of a sectional view CC of the device 1 , the section being in FIG. Figure 6. The receiving part 29 includes blades 204 extending from the inner wall so as to form at least one suction air flow channel between the air suction hole 22 and the suction air outlet hole 201 on the one hand, and to form at least one cooling duct on the other hand to allow the cooling air entering through the at least one cooling air inlet hole 203 to flow into the cavity. Therefore, the receiving part 29 is cleverly designed to allow the realization of separate and different cooling circuits and air suction circuits. In addition, the receiving part 29 allows the cooling air to flow near the motor 23 while avoiding the flow of suction air (containing steam) near the motor 23. Advantageously, as Figure 5 and Figure 7 As shown, the air suction circuit and the cooling circuit are designed so that the suction air flows in a direction orthogonal to the flow direction of the cooling air at the fabric sheet.

[0091] Preferably, each blade 204 is hollow so as to define at least one cooling duct. Also preferably, a suction air flow channel is defined between two blades 204.

[0092] Preferably, the receiving member 29 has an air rectifying function. More specifically, each blade 204 preferably has a curved shape to rectify the suction air flowing between the at least one air suction hole 22 and the suction air outlet 201. Therefore, the suction air is guided and flows faster.

[0093] The operation of the device will now be described.

[0094] When the user wishes to use the device, he fills the reservoir 62 with liquid, preferably water, and then starts the device 1 by pressing a button to power it on. It is assumed that the device has previously been connected to the household power grid by electrical wires. The heating elements of the primary steam generator 61 and, if necessary, the secondary steam generator 25 are then powered to reach their operating temperature, advantageously regulated by a thermostat.

[0095] When the user wishes to use the device in the vertical ironing position, he orients the treatment surface 20 vertically towards the piece of fabric to be ironed and then presses the control device 8 (preferably a button here), which has the effect of running the pump 63 and allowing liquid to flow from the reservoir 62 to the primary steam generator 61.

[0096] The steam generated in the primary steam generator 61 then escapes through the duct 4 towards a possible secondary steam generator 25 and then through the steam outlet holes 24. The steam then diffuses onto the fabric piece, which in combination with the heating and drying action of the treatment plate 200 allows it to be ironed.

[0097] At the same time, a control device 8 may be provided to activate air suction in combination with steam discharge. For example, pressing the control device 8 may allow power to be supplied to the motor 23, so that the motor starts running. Thus, the fan 21 is driven in rotation and air is sucked through the suction holes 22. Suction in particular allows pressing the fabric piece against the treatment surface 20. Thus, steam discharge combined with suction allows optimized ironing. In addition, air suction also allows promoting the drying of the fabric piece portion that has just been subjected to steam. It has been found that this particular way allows, after the fabric piece has been treated, the ironing effect to be maintained for a longer period of time over time.

[0098] According to another embodiment, the control device 8 allows the user to control the suction in a manner independent of the control of the steam emission. Thus, the user can control the steam emission only or in combination with the suction.

[0099] During treatment, the user may move the device 1 in a vertical direction, for example from top to bottom, to treat all or part of a piece of fabric.

[0100] The device 1 may also be used occasionally in a horizontal ironing position, for example to iron a piece of fabric lying horizontally on a table, by positioning the treatment surface 20 horizontally above the piece of fabric.

[0101] The invention is not limited to the embodiments described and shown in the drawings. Modifications are still possible without departing from the general teaching, in particular in the composition of the various technical features, or by replacement by technical equivalents.

Claims

1. An ironing device (1) having a portable housing (10), the portable housing comprising a handle (4) and an ironing head (2) connected to the handle (4), the portable housing (10) further comprising: - a steam circuit comprising a steam generator (61); - an air suction circuit extending between at least one suction hole (22) and at least one suction air outlet hole (201) and comprising a fan (21) driven in rotation by a motor (23), said fan (21) and said motor (23) being arranged in said ironing head (2); The ironing head (2) comprises a treatment surface (20) facing the fabric piece to be ironed, the treatment surface (20) comprising at least one steam outlet hole (24) connected to the steam circuit and at least one suction hole (22) forming a suction air inlet of the air suction circuit, Characterized in that the ironing head (2) comprises an air cooling circuit (23) for the motor, the air cooling circuit extending between at least one cooling air inlet hole (203) and at least one cooling air outlet hole (202) provided in the ironing head (2), the cooling circuit being separate and distinct from the air suction circuit.

2. The device according to claim 1, wherein the cooling circuit comprises a propeller (27) rotatably mounted to cause air entering through the cooling air inlet opening (203) to flow to the cooling air outlet opening (202).

3. Device according to claim 2, wherein the propeller (27) is axial, helical centrifugal or centrifugal.

4. A device according to any one of claims 2 and 3, wherein the motor (23) extends longitudinally along an axis from a first end to a second end, the first end being closer to the processing surface (20) than the second end, and wherein the propeller (27) is arranged at the second end of the motor (23).

5. The device according to any one of claims 1 to 4, wherein the ironing head (2) comprises a rear surface opposite to the processing surface (20) and a side surface extending between the processing surface (20) and the rear surface, wherein the cooling air inlet hole (203) is arranged at the side surface, and the cooling air outlet hole (202) is arranged at the rear surface.

6. The device according to claim 5, wherein the air suction circuit comprises at least one suction air outlet hole (201) arranged at the rear surface.

7. The device according to claim 6, wherein the at least one cooling air outlet opening (202) of the cooling circuit opens into the air suction circuit at a suction air outlet opening (201) of the air suction circuit.

8. The device according to any one of claims 1 to 7, wherein the cooling circuit comprises a plurality of cooling air inlet openings (203) and / or a plurality of cooling air outlet openings (202).

9. A device according to any one of claims 1 to 8, wherein the portable housing (10) includes a receiving part (29), the receiving part (29) includes an inner wall defining a cavity, the motor (23) is arranged in the cavity, and the receiving part (29) also includes blades (204) extending from the inner wall so as to form at least one suction air flow channel between the at least one air suction hole (22) and the suction air outlet hole (201) on the one hand, and to form at least one cooling duct on the other hand to allow the cooling air entering through the at least one cooling air inlet hole (203) to flow into the cavity.

10. The apparatus of claim 9, wherein each blade (204) is hollow so as to define the at least one cooling duct.

11. The device according to claim 9 or 10, wherein the at least one suction air flow channel is defined between two blades (204).

12. The device according to any one of claims 9 to 11, wherein each blade (204) has a curved shape for rectifying the suction air flowing between the at least one suction hole (22) and the suction air outlet hole (201).

13. The device according to any one of claims 9 to 12, wherein the air suction circuit and the cooling circuit are designed so that the suction air flows in a direction orthogonal to the cooling air flow direction at the fabric sheet (29).

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