Crease-removal smoothing apparatus

Abstract

The invention relates to a smoothing apparatus (1) having a portable housing (10) comprising a handle (4) and a smoothing head (2) connected to the handle (4), the portable housing (10) further comprising: -a steam circuit comprising a steam generator (61); - an air intake circuit extending between at least one intake orifice (22) and at least one intake-air outlet orifice and comprising a fan (21) intended to be driven in rotation by a motor (23), the fan (21) and the motor (23) being arranged in the smoothing head (2); in which the smoothing head (2) comprises a treatment face (20) intended to face a textile item from which creases are to be removed, the treatment face (20) comprising at least one steam outlet orifice (24) connected to the steam circuit and at least one intake orifice (22) forming the intake-air inlet of the air intake circuit, characterized in that the smoothing head (2) comprises an air cooling circuit for cooling the motor (23) and extending between at least one cooling-air inlet orifice and at least one cooling-air outlet orifice, which orifices are formed in the smoothing head (2), the cooling circuit being separate and distinct from the air intake circuit.

Description

[0001] Steaming device

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to the field of small household appliances, more precisely to steaming appliances.

[0004] STATE OF THE ART

[0005] To iron a garment, an iron is traditionally used. Due to the constraints of using an iron (for example, the need for an ironing board), portable steaming devices have been developed that do not require the use of an ironing board and are quick and easy to use. These devices are commonly called "steamers." Steaming devices smooth by applying a hot steaming surface to the garment, while the garment is hung on a hanger, in combination with the release of steam. Steaming devices can smooth a garment provided they are used correctly.

[0006] In practice, it has been observed that the user does not stretch the garment sufficiently and does not press the steaming side sufficiently against the garment, so that the action of the appliance is limited. The garment is therefore less well ironed than if the appliance had been used correctly. As a result, steaming appliances have been proposed that vacuum the garment in addition to heating it and releasing steam. These improved appliances require a motor to implement the suction, which may overheat.

[0007] STATEMENT OF THE INVENTION

[0008] An aim of the invention is to provide a steaming device, preferably portable, incorporating suction technology and optimized to avoid any damage to the device due to its operation.

[0009] According to a first aspect, there is provided a steaming apparatus having a portable housing comprising a handle and a steaming head connected to the handle, the portable housing further comprising:

[0010] - a steam circuit comprising a steam generator;

[0011] - an air suction circuit extending between at least one suction orifice and at least one suction air outlet orifice and comprising a fan intended to be driven in rotation by a motor, the fan and the motor being arranged in the steaming head; wherein the steaming head comprises a treatment face intended to come opposite a textile piece to be steamed, the treatment face comprising at least one steam outlet orifice connected to the steam circuit and at least one suction orifice forming the suction air inlet of the air suction circuit, characterized in that the steaming head comprises an air cooling circuit for the motor extending between at least one cooling air inlet orifice and at least one cooling air outlet orifice provided in the steaming head, the cooling circuit being separate and distinct from the air suction circuit.

[0012] According to advantageous and non-limiting characteristics, taken alone or in any combination:

[0013] - the handle has a shape suitable for being grasped with one hand and allowing the appliance to be moved in relation to the piece of textile to be steamed. Advantageously, the handle has an elongated shape and has a circumference of less than 20 cm.

[0014] - the steaming device weighs less than 2 kg and preferably less than 1.5 kg.

[0015] - the cooling circuit comprises a propeller mounted for rotation to circulate air entering through the cooling air inlet port to the cooling air outlet port;

[0016] - the propeller is axial, helico-centrifugal or centrifugal;

[0017] - the motor extends from a first end to a second end longitudinally along an axis, the first end being located closer to the treatment face than the second end, and wherein the propeller is arranged at the second end of the motor;

[0018] - the steaming head comprises a rear face opposite the treatment face and a side face extending between the treatment face and the rear face, and in which the cooling air inlet orifice is provided at the side face and the cooling air outlet orifice is provided at the rear face;

[0019] - the air suction circuit comprises at least one suction air outlet orifice provided at the rear face;

[0020] - the at least one cooling air outlet of the cooling circuit opens into the air suction circuit at the suction air outlet of the air suction circuit;

[0021] - the cooling circuit comprises several cooling air inlet ports and / or several cooling air outlet ports; - the portable housing comprises a receiving part comprising an internal wall defining an enclosure in which the motor is arranged, the receiving part further comprising blades extending from the internal wall to form on the one hand at least one suction air circulation channel between the at least one air suction port and the suction air outlet and on the other hand at least one cooling duct to allow circulation into the enclosure of cooling air entered through the at least one cooling air inlet port;

[0022] - each blade is hollow so as to define at least one cooling duct;

[0023] - the at least one suction air circulation channel is defined between two blades;

[0024] - each blade has a curved shape to straighten the suction air flowing between the at least one air suction port and the suction air outlet port;

[0025] -the air suction circuit and the cooling circuit are designed so that the suction air flows in a direction orthogonal to the direction of circulation of the cooling air at the workpiece;

[0026] - the portable housing comprises a base connected to a lower end of the handle, the steam generator being arranged in the base;

[0027] - the steam circuit comprises a liquid reservoir and a pump arranged to circulate the liquid from the liquid reservoir to the steam generator, the liquid reservoir and the pump being arranged in the base;

[0028] - the base has a flat external face, said external face being intended to place the device on a substantially flat surface.

[0029] DESCRIPTION OF FIGURES

[0030] Other features and advantages of the present invention will become apparent upon reading the following description of a preferred embodiment. This description will be given with reference to the appended figures, including: Figure 1 shows a steaming apparatus according to a certain embodiment; Figure 2 is a side sectional view of the steaming apparatus; Figure 3 is a sectional view from above of the steaming apparatus; Figure 4 is a second sectional view of the steaming apparatus; Figure 5 is a sectional view from above of the steaming apparatus and shows the air circulation; Figure 6 is a side view of the steaming apparatus; Figure 7 is part of a sectional view CC of the steaming apparatus along the section plane shown in Figure 6.

[0031] DETAILED DESCRIPTION OF THE INVENTION

[0032] It should be noted that in this document, the terms "vertical", "lower", "upper", "front", "rear" used to describe the steaming device refer to this device when it is resting flat on its base.

[0033] Figure 1 shows a steaming device 1 having a portable housing 10 comprising a handle 4 surmounted by a steaming head 2 comprising a treatment face 20 intended to come opposite a textile piece to be steamed. The side of the portable housing 10 where the treatment face 20 is arranged corresponds to the front part of the portable housing 10.

[0034] The steaming device has the particularity of further comprising a base 6 in the extension of the handle 4 on the opposite side of the steaming head 2.

[0035] With reference to figures 2 and 3, the portable housing 10 further comprises an air suction circuit comprising a fan 21 intended to be driven in rotation by a motor 23 and comprising at least one suction air outlet orifice 201. The fan 21 and the motor 23 are preferably arranged in the steaming head 2.

[0036] The portable housing 10 also comprises a steam circuit comprising a steam generator 61. Such a steam generator 61 is preferably arranged in the base 6.

[0037] The steam circuit is adapted to allow the emission of steam at the treatment face 20 and the air suction circuit is adapted to allow air suction at the treatment face 20.

[0038] Preferably, the portable housing is made of a plastic material. For example, the portable housing may be made of polypropylene or polycarbonate.

[0039] As its name suggests, the case is portable. Accordingly, it is intended to be carried by an individual and the device is intended to be handled with one hand, in particular by being held by the handle 4.

[0040] The portable housing 10 preferably comprises control means 8 (for example in the form of a button) configured to control the emission of steam and the suction of air. The control means 8 are preferably arranged on the handle 4. These control means 8 are preferably designed to be actuated by the user with the hand used to carry the portable housing of the steaming appliance.

[0041] Furthermore, the handle 4 is provided to contain electrical cables, for example to electrically power the motor 23. The handle 4 preferably has a mass of the order of 50 grams.

[0042] The base 6 comprises a flat external face 60 provided for placing the device on a substantially flat surface S in a so-called rest position, illustrated in FIG. 4. This face 60 is preferably a distal face of the base 6.

[0043] When the device 1 is in its rest position, the longitudinal axis P of the handle 4 (illustrated in FIG. 4) is preferably slightly inclined forward. Specifically, the portable housing 10 is configured so that the longitudinal axis P makes a non-zero angle with an axis orthogonal to the external face 60 (corresponding to the surface S of the device), for example an angle of the order of 15°.

[0044] According to another embodiment, the longitudinal axis P of the handle 4 is perpendicular to the external face 60.

[0045] Preferably, the base 6 has a rear face equipped with a button for switching on the device.

[0046] Preferably, the base 6 also includes an electrical power cord allowing its connection to a domestic electrical network. The cord may be removable.

[0047] The cord has a length preferably greater than 200 cm. The cord has a mass preferably of the order of 150 grams when the device 1 is carried by a user at a height of approximately 1.5 meters above the ground.

[0048] According to an embodiment not illustrated, the steaming device 1 does not include a base 6. Thus, the power button can be arranged, for example, on the portable housing 10 and more precisely on the steaming head 2. Similarly, the cord can be connected to the portable housing 10 and more precisely to the steaming head 2.

[0049] The steaming apparatus 1 preferably comprises a steam generator 61 forming part of the steam circuit. The steam generator 61 is adapted to generate steam from liquid coming from a liquid reservoir 62. The steam generator 61 defines an enclosure intended to receive liquid, and the steam generator 61 preferably comprises at least one shielded heating element 65 for heating the liquid coming from the reservoir 62 in the enclosure. The steam generator 61 is preferably connected to a conduit 41 of the steam circuit arranged to allow the circulation of steam from the steam generator 61 to the steaming head 2.

[0050] The steam generator 61 is typically made of a metal body, for example aluminum, and preferably has a mass of the order of 250 grams. This mass typically includes the mass of the aluminum structure, the shielded heating element 65, electrical safety and thermal regulation elements as well as a concentrator which are preferably included in the steam generator 61. The liquid 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.

[0051] According to the embodiment illustrated in Figure 2, the reservoir 62 is arranged in the front part of the portable housing 10, or more specifically the front part of the base 6.

[0052] The reservoir 62 preferably comprises a transparent envelope, defining the external wall of the reservoir 62, provided with a removable cap 620 allowing the reservoir 62 to be filled. The reservoir 62 is adapted to contain a liquid, typically water or a liquid solution diluted in water.

[0053] The reservoir 62 preferably has a capacity of approximately 100 mL. When empty, the reservoir preferably has a mass of the order of 50 grams. For example, the reservoir 62, when it contains approximately 100 grams of water and is therefore 100% full, has a mass of the order of 150 grams.

[0054] Also preferably, the steam circuit comprises a pump 63 arranged to circulate liquid from the reservoir 62 to the steam generator 61 and this pump 63 is advantageously arranged in the base 6.

[0055] The pump 63 preferably has a mass of the order of 50 grams.

[0056] According to a possible embodiment shown in Figure 2, the steam generator 61, the tank 62 and the pump 63 are included in the portable housing 10 and more precisely in the base 6.

[0057] According to another embodiment not illustrated, the steam generator 61, the reservoir 62 and the pump 63 are not included in the portable housing 10 but are included in a base offset from the portable housing 10. This base is preferably connected to the portable housing 10 via a flexible conduit which allows steam to circulate from the steam generator 61 to the steaming head 2.

[0058] The steaming head 2 is connected to an upper end of the handle 4 and the base 6 is connected to a lower end of the handle 4 opposite the upper end. According to the embodiment shown in Figure 1, the lower part of the handle 4 has a flared shape, the cross-section of which increases progressively as it approaches the base 6.

[0059] The steaming head 2 comprises a front end provided with the treatment face 20 intended to come opposite a textile piece to be steamed. The steaming head 2 also preferably has a rear end opposite the front end and provided with a rear face opposite the treatment face 20. Also, the steaming head 2 preferably has a lateral face extending between the rear face and the treatment face 20. The treatment face 20 preferably comprises a treatment plate 200, preferably metallic, for example an aluminum treatment plate 200.

[0060] This treatment plate 200 may for example be a heating plate 200 to improve the smoothing as explained later. Such a heating plate 200 may be heated by one or more heating elements 26 arranged in the smoothing head near the treatment face 20.

[0061] The treatment face 20 comprises at least one steam outlet orifice 24 connected to the steam circuit and at least one suction orifice 22 connected to the air suction circuit.

[0062] The treatment face 20 may have different shapes, such as, for example, a rectangular or triangular shape. Preferably, it comprises a plurality of steam outlet orifices 24 and a plurality of suction orifices 22.

[0063] The various steam outlet orifices and suction orifices may have the shape of holes or slots. In the example shown in FIG. 1, the steam outlet orifices 24 take the shape of holes and the suction orifices 22 take the shape of slots.

[0064] Advantageously, a secondary steam generator 25 is arranged in the steaming head 2. The secondary steam generator 25 is part of the steam circuit. The secondary steam generator 25 is preferably connected to the conduit 41. In fact, the secondary steam generator 25 makes it possible to vaporize again liquid coming from the steam generator 61, called the “primary steam generator”, having circulated in the conduit 41. Indeed, during its circulation in the conduit 41, the steam can cool to the point that a portion of the steam condenses. Thus, steam condensates circulate to the secondary steam generator 25. The secondary steam generator 25 preferably makes it possible to vaporize these condensates so that no liquid is emitted via the steam outlet orifices 24.It is particularly advantageous to avoid liquid being emitted via the steam outlet orifices 24 since this would wet the treated textile piece and would not allow it to be properly smoothed. To vaporize the condensates, the secondary steam generator 25 preferably comprises at least one heating element 26 of the PTC thermistor type or shielded heating element. The secondary steam generator 25 can also be called an “evaporator” since it makes it possible to reheat the steam generated by the steam generator 61.

[0065] Preferably, the heating element(s) 26 of the secondary steam generator 25 are in thermal contact with the treatment face 20. Thus, the treatment face 20, preferably more precisely the heating plate 200, can be heated by the heating element(s) 26 of the secondary steam generator 25, which allows more effective smoothing when the treatment face 20 is arranged opposite a piece of textile.

[0066] According to an embodiment not shown, a silicone part is placed between the heating element(s) 26 of the secondary steam generator 25 and the treatment face 20 so that the temperature of the treatment face 20 does not exceed a certain temperature threshold, typically 150°C.

[0067] The secondary steam generator 25 is typically made of a metal body, for example aluminum.

[0068] The secondary steam generator 25 also preferably includes electrical safety and thermal regulation elements.

[0069] The assembly comprising the treatment face 20 and the secondary steam generator 25 thus preferably has a mass of the order of 100 grams.

[0070] The steaming head 2 comprises the air suction circuit which extends between the suction ports 22 and the suction air outlet port 201. The circulation of suction air in the air suction circuit is shown schematically with solid arrows in Figure 5. The air suction circuit also comprises the fan 21 and the motor 23. The fan 21 and the motor 23 are arranged in the steaming head 2.

[0071] Preferably, the motor 23 is arranged inside the steaming head 2 in the axial extension of the treatment face 20. The motor 23 extends along a longitudinal axis M illustrated in figure 4.

[0072] According to Figure 4, the steaming head 2 has a slender shape extending transversely to the handle 4, preferably forming an angle α of the order of 65° relative to the longitudinal axis P of the handle. Preferably, the handle 4 extends along an axis which passes through at least part of the motor 23. The axes P and M are advantageously intersecting.

[0073] The motor 23 is adapted to drive the fan 21 in rotation. The fan 21, forming part of the air suction circuit, allows air to be sucked in from the air suction ports 22.

[0074] The assembly comprising the motor 23 and the fan 21 preferably has a mass of the order of 300 grams.

[0075] Preferably, the air suction circuit is configured to allow an air suction flow rate greater than 10 m3 / h and less than 60 m3 / h and, more preferably, an air suction flow rate greater than 20 m3 / h and less than 50 m3 / h.

[0076] The suction air outlet 201 is preferably arranged at the rear face. By "at the rear face" it is understood that the suction air outlet 201 is arranged on the rear face or on the side face close to the rear face. If the suction air outlet 201 is arranged on the side face, it is preferably arranged at a distance from the rear face of less than 9 cm.

[0077] The steaming head 2 comprises a motor air cooling circuit 23 extending between at least one cooling air inlet orifice 203 and at least one cooling air outlet orifice 202 provided in the steaming head 2. The circulation of cooling air in the cooling circuit is shown diagrammatically with dotted arrows in Figure 5. The motor air cooling circuit 23 is intended to allow the cooling of the motor 23 which, when in operation, heats up. If the motor 23 reaches a certain critical temperature threshold, it may malfunction and it is therefore desirable to cool it. Preferably, the steaming head 2 comprises at least two primary cooling air inlet orifices 203 and at least two cooling air outlet orifices 202.

[0078] The cooling circuit is separate and distinct from the air intake circuit as illustrated in Figure 5. According to this advantageous arrangement, the engine 23 is cooled efficiently while avoiding any damage to the engine by circulation of steam-laden air in the engine.

[0079] As illustrated in Figure 5, the cooling air inlet 203 is preferably arranged on the side face of the steaming head 2. Also preferably, the cooling air outlet 202 is arranged at the rear face. If the cooling air outlet 202 is arranged on the side face, it is preferably arranged at a distance from the rear face of less than 8 cm. Also preferably, it is preferably arranged at a distance from the rear face of more than 1 cm.

[0080] According to a non-illustrated embodiment, the cooling air outlet orifice 202 of the cooling circuit opens into the air suction circuit at the suction air outlet orifice 201 of the air suction circuit. By "at the suction air outlet orifice", it is understood that the cooling air outlet orifice 202 is arranged close to the suction air outlet orifice 201, for example at a distance from the suction air outlet orifice 201 of less than 2 cm. This makes it possible to generate a Venturi effect and to increase the circulation speed of the suction air and the cooling air (and thus to optimize the cooling within the device).

[0081] Advantageously, as illustrated in Figure 3, the cooling circuit further comprises a propeller 27 mounted in rotation to circulate air entering through the cooling air inlet orifice 203 to the cooling air outlet orifice 202. The propeller 27 makes it possible to guide the air along the path illustrated by the dotted arrows in Figure 5. The propeller 27 may be axial, helico-centrifugal or centrifugal. The propeller 27 may be arranged in different positions with respect to the motor 23. The motor 23 extends from a first end to a second end longitudinally along an axis. The first end is located closer to the treatment face 20 than the second end. The propeller 27 may for example be arranged at the first end or the second end of the motor 23, in other words at the front or at the rear of the motor 23.However, it is preferable for the propeller to be positioned in the rear part of the engine 23, which in particular makes it possible to optimize the air flow circulating in the cooling circuit. In particular, positioning the propeller in the rear part of the engine 23 makes it possible to limit pressure losses.

[0082] Preferably, the portable housing 10 comprises a receiving part 29 comprising an internal wall defining an enclosure in which the motor 23 is arranged. This receiving part 29 is therefore preferably included in the steaming head 2. The receiving part is illustrated in FIG. 7 representing a part of the sectional view CC of the apparatus 1, the sectional plane of which is shown diagrammatically in FIG. 6. The receiving part 29 comprises blades 204 extending from the internal wall to form, on the one hand, at least one suction air circulation channel between the air suction orifice 22 and the suction air outlet orifice 201 and, on the other hand, at least one cooling duct to allow circulation into the enclosure of cooling air entered through the at least one cooling air inlet orifice 203.The receiving part 29 is thus cleverly designed to allow a separate and distinct cooling circuit and air suction circuit. Furthermore, the receiving part 29 allows the circulation of cooling air near the motor 23 while avoiding the circulation of suction air (laden with vapor) near the motor 23. Advantageously, as illustrated in FIG. 5 and FIG. 7, the air suction circuit and the cooling circuit are designed so that the suction air circulates in a direction orthogonal to the direction of circulation of the cooling air at the part.

[0083] Preferably, each blade 204 is hollow so as to define the at least one cooling duct. Also preferably, the suction air circulation channel is defined between two blades 204.

[0084] Preferably, the receiving part 29 has an air straightener function. More precisely, each blade 204 preferably has a curved shape to straighten the suction air circulating between the at least one air suction orifice 22 and the suction air outlet 201. Thus, the suction air is guided and circulates more quickly.

[0085] The operation of the device will now be described.

[0086] When the user wishes to use the appliance, he fills the tank 62 with liquid (preferably water) and then starts the appliance 1 by pressing the button to turn it on. It is assumed that the appliance has previously been connected to a domestic electrical network via the cord. The heating element of the primary steam generator 61 and of the secondary steam generator 25, if applicable, is then supplied with current so as to reach its operating temperature, advantageously regulated by means of a thermostat.

[0087] When the user wishes to use the appliance in a vertical steaming position, he brings the treatment face 20 vertically opposite the textile piece to be steamed and then presses the control means 8 (here preferably a button), which has the effect of operating the pump 63 and allowing the flow of liquid from the reservoir 62 to the primary steam generator 61.

[0088] The steam produced in the primary steam generator 61 then escapes through the conduit 4 towards the possible secondary steam generator 25 then through the steam outlet orifices 24. The steam is then diffused onto the textile piece which, combined with the heating and drying action of the treatment plate 200, allows it to be smoothed.

[0089] Simultaneously, the control means 8 may be provided to activate an air suction coming in combination with the emission of steam. For example, pressing on the control means 8 may make it possible to supply the motor 23 with electricity which thus starts to operate. Consequently, the fan 21 is driven in rotation and air is sucked in via the suction orifices 22. The suction makes it possible in particular to press the textile piece against the treatment face 20. The emission of steam combined with the suction thus makes it possible to optimize the smoothing. Furthermore, the air suction also makes it possible to promote the drying of the portion of the textile piece which has just been subjected to the steam. It has been found that this particular method makes it possible to maintain the smoothing effect for a longer time after having treated the textile piece.

[0090] According to another embodiment, the control means 8 allow the user to control the suction in a manner decorrelated from the control of the steam emission. Thus, the user could control the steam emission only or combined with the suction.

[0091] During treatment, the user can move the apparatus 1 in a vertical direction, for example from top to bottom, to treat all or part of the textile piece.

[0092] The apparatus 1 may also be used occasionally in a horizontal steaming position, for example to steam a piece of textile placed horizontally against a table, by bringing the treatment face 20 horizontally above the piece of textile. The invention is not limited to the embodiment described and shown in the appended figures. Modifications remain possible, in particular from the point of view of the constitution of the various technical characteristics or by substitution of technical equivalents, without departing from the general teaching.

Claims

CLAIMS 1. A steaming apparatus (1) having a portable housing (10) comprising a handle (4) and a steaming 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 orifice (22) and at least one suction air outlet orifice (201) and comprising a fan (21) intended to be driven in rotation by a motor (23), the fan (21) and the motor (23) being arranged in the steaming head (2);wherein the steaming head (2) comprises a treatment face (20) intended to come opposite a textile piece to be steamed, the treatment face (20) comprising at least one steam outlet orifice (24) connected to the steam circuit and the at least one suction orifice (22) forming the suction air inlet of the air suction circuit, characterized in that the steaming head (2) comprises an air cooling circuit for the motor (23) extending between at least one cooling air inlet orifice (203) and at least one cooling air outlet orifice (202) provided in the steaming head (2), the cooling circuit being separate and distinct from the air suction circuit.; 2. Apparatus according to claim 1, wherein the cooling circuit comprises a propeller (27) rotatably mounted to circulate air entering through the cooling air inlet (203) to the cooling air outlet (202).

3. Apparatus according to claim 2, wherein the propeller (27) is axial, helico-centrifugal or centrifugal.

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

5. Apparatus according to one of claims 1 to 4, wherein the steaming head (2) comprises a rear face opposite the treatment face (20) and a side face extending between the treatment face (20) and the rear face, and wherein the cooling air inlet orifice (203) is provided at the side face and the cooling air outlet orifice (202) is provided at the rear face.

6. Apparatus according to claim 5, wherein the air suction circuit comprises at least at least one suction air outlet orifice (201) provided at the rear face.

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

8. Apparatus according to one of claims 1 to 7, wherein the cooling circuit comprises several cooling air inlet ports (203) and / or several cooling air outlet ports (202).

9. Apparatus according to one of claims 1 to 8, wherein the portable housing (10) comprises a receiving part (29) comprising an internal wall defining an enclosure in which the motor (23) is arranged, the receiving part (29) further comprising blades (204) extending from the internal wall to form on the one hand at least one suction air circulation channel between the at least one air suction orifice (22) and the suction air outlet orifice (201) and on the other hand at least one cooling duct to allow circulation into the enclosure of cooling air entered through the at least one cooling air inlet orifice (203).

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

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

12. Apparatus according to one of claims 9 to 11, wherein each blade (204) has a curved shape to straighten the suction air flowing between the at least one suction orifice (22) and the suction air outlet orifice (201).

13. Apparatus according to 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 direction of circulation of the cooling air at the receiving part (29).

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