DRYING APPARATUS

Description

[0001] The invention relates to drying apparatus which makes use of a narrow jet of high velocity, high pressure air to dry an object, including part of the human body. Particularly, the invention relates to a hand dryer in which the air jet is emitted through a slot-like opening in the casing of the hand dryer.

[0002] The use of air jets to dry hands is well known. Examples of hand dryers which emit at least one air jet through a slot-like opening are shown in GB 2249026A, JP 2002-034835A, JP 2002-306370A and JP 2005177415. However, in practice it is very difficult to achieve an evenly distributed airflow of sufficiently high momentum to dry the user's hands efficiently in an acceptably short length of time. The prior art does not achieve this.

[0003] It is an object of the invention to provide drying apparatus which, in use, emits an air jet through a slot-like opening which is capable of drying an object in a short time as compared to the prior art. It is another object to provide a hand dryer which is capable of drying the user's hands in a short time in comparison to the prior art. It is a further object of the invention to provide an improved hand dryer in which the drying efficiency is improved in comparison to the prior art.

[0004] The invention provides hand drying apparatus having a casing, a cavity formed in the casing for receiving an object, a fan located in the casing and capable of creating an airflow, two opposed slot-like openings communicating with the fan and arranged in opposing sides of the casing so as to direct an airflow transversely across the cavity, characterised in that the two slot-like openings have different widths and the maximum width being no greater than 1.0 mm.

[0005] By providing a slot-like opening having a width of no more than 1.0mm, the momentum of the airflow emitted through the opening is greatly increased in comparison to that of the prior art devices. This increases the efficiency of the dryer by virtue of the fact that more water is blown from the object during each pass thereof through the airflow exiting the slot-like openings. The distribution of the airflow along the slot-like openings is also comparatively even when compared to the prior art.

[0006] In one preferred embodiment, each slot-like opening has a constant width, more preferably one slot-like opening has a width of at least 0.3mm and advantageously no more than 0.4mm. These preferred dimensions provide the airflow with a particularly effective level of momentum. In a preferred embodiment, the width of the slot-like opening in the front wall of the cavity is smaller than the width of the slot-like opening in the rear wall of the cavity. This arrangement allows a greater proportion of the airflow to be emitted onto the backs of the user's hands which enhances the drying process.

[0007] In a further preferred embodiment, one slot-like opening has a width which varies along its length, with the maximum width being greatest at the centre of the slot-like opening. The maximum width of the slot-like opening is preferably no more than twice the minimum width. This provides an arrangement in which a larger mass of air is emitted from the centre of the slot-like opening which is advantageous when the slot-like openings are provided in a hand dryer.

[0008] Embodiments of the invention, both in the form of a hand dryer, will now be described with reference to the accompanying drawings, in which:

Figure 1 is a side view of a hand dryer according to a first embodiment of the invention;

Figure 2 is a perspective view of the hand dryer of Figure 1;

Figure 3 is a side sectional view of the hand dryer of Figure 1;

Figure 4 is a side sectional view, shown on an enlarged scale, of the upper ends of the air ducts forming part of the hand dryer of Figure 1;

Figure 5 is a schematic sectional side view, shown on a further enlarged scale, of the slot-like opening located in the front wall of the cavity of the hand dryer of Figure 1;

Figure 6 is a schematic sectional side view, shown on the same further enlarged scale, of the slot-like opening located in the rear wall of the cavity of the hand dryer of Figure 1; and

Figure 7 is a schematic front view of the rear slot-like opening forming part of a hand dryer according to a second embodiment of the invention.

[0009] Referring firstly to Figures 1 and 2, the hand dryer 10 shown in Figures 1 to 6 comprises an outer casing 12 having a front wall 14, a rear wall 16, an upper face 18 and side walls 20, 22. The rear wall 16 can incorporate fixing devices (not shown) for securing the hand dryer 10 to a wall or other structure prior to use. An electrical connection (not shown) is also provided on the rear wall or elsewhere on the casing 12. A cavity 30 is formed in the upper part of the casing 12 as can be seen from Figures 1 and 2. The cavity 30 is open at its upper end and delimited thereat by the top of the front wall 14 and the front of the upper face 18. The space between the top of the front wall 14 and the front of the upper face 18 forms a cavity entrance 32 which is sufficiently wide to allow a user's hands to be introduced to the cavity 30 through the cavity entrance 32. The cavity 30 is also open to the sides of the hand dryer 10 by appropriate shaping of the side walls 20, 22.

[0010] The cavity 30 has a front wall 34 and a rear wall 36 which delimit the cavity 30 to the front and rear respectively. Located in the lowermost end of the cavity 30 is a drain 38 which communicates with a reservoir (not shown) located in the lower part of the casing 12. The purpose of the drain and reservoir will be described below.

[0011] As shown in Figure 3, a fan 40, which is driven by a motor (not shown), is located inside the casing 12. The motor is connected to the electrical connection and is controlled by a controller 41. The inlet 42 of the fan 40 communicates with an air inlet 44 formed in the casing 12. A filter 46 is located in the air passageway connecting the air inlet 44 to the fan inlet 42 so as to prevent the ingress of any debris which might cause damage to the motor or the fan 40. The outlet of the fan 40 communicates with a pair of air ducts 50, 52 which are located inside the casing 12. The front air duct 50 is located primarily between the front wall 14 of the casing 12 and the front wall 34 of the cavity 30, and the rear air duct 52 is located primarily between the rear wall 16 of the casing 12 and the rear wall 36 of the cavity 30.

[0012] The air ducts 50, 52 are arranged to conduct air from the fan 40 to a pair of opposed slot-like openings 60, 62 which are located in the front and rear walls 34, 36 respectively of the cavity 30. The slot-like openings 60, 62 are arranged at the upper end of the cavity 30 in the vicinity of the cavity entrance 32. The slot-like openings 60, 62 are each configured so as to direct an airflow generally across the cavity entrance 32 towards the opposite wall of the cavity 30. The slot-like openings 60, 62 are offset in the vertical direction and angled towards the lowermost end of the cavity 30.

[0013] Figure 4 shows the upper ends of the air ducts 50, 52 and the slot-like openings 60, 62 in greater detail. As can be seen, the walls 54a, 54b of the air duct 50 converge to form the slot-like opening 60 and the walls 56a, 56b of the air duct 52 converge to form the slot-like opening 62. Even greater detail can be seen in Figures 5 and 6. Figure 5 shows that the slot-like opening 60 has a width of W1 and Figure 6 shows that the slot-like opening 62 has a width of W2. The width W1 of the slot-like opening 60 is smaller than the width W2 of the slot-like opening 62. The width W1 is 0.3mm and the width W2 is 0.4mm. In this embodiment, both widths W1 and W2 are constant across the length of each respective slot-like opening.

[0014] Sensors 64 are positioned in the front and rear walls 34, 36 of the cavity 30 immediately below the slot-like openings 60, 62. These sensors 64 detect the presence of a user's hands which are inserted into the cavity 30 via the cavity entrance 32 and are arranged to send a signal to the motor when a user's hands are introduced to the cavity 30. As can be seen from Figures 1 and 3, the walls 54a, 54b, 56a, 56b of the ducts 50, 52 project slightly beyond the surface of the front and rear walls 34, 36 of the cavity 30. The inward projection of the walls 54a, 54b, 56a, 56b of the ducts 50, 52 reduces the tendency of the user's hands to be sucked towards one or other of the walls 34, 36 of the cavity, which enhances the ease with which the hand dryer 10 can be used. The positioning of the sensors 64 immediately below the inwardly projecting walls 54a, 54b, 56a, 56b of the ducts 50, 52 also reduces the risk of the sensors 64 becoming dirty and inoperative.

[0015] As can be seen from Figure 2, the shape of the cavity entrance 32 is such that the front edge 32a is generally straight and extends laterally across the width of the hand dryer 10. However, the rear edge 32b has a shape which consists of two curved portions 33 which generally follow the shape of the backs of a pair of human hands as they are inserted downwardly into the cavity 30 through the cavity entrance 32. The rear edge 32b of the cavity entrance 32 is substantially symmetrical about the centre line of the hand dryer 10. The intention of the shaping and dimensioning of the front and rear edges 32a, 32b of the cavity entrance 32 is that, when a user's hands are inserted into the cavity 30 through the cavity entrance 32, the distance from any point on the user's hands to the nearest slot-like opening is substantially uniform.

[0016] The hand dryer 10 described above operates in the following manner. When a user's hands are first inserted into the cavity 30 through the cavity entrance 32, the sensors 64 detect the presence of the user's hands and send a signal to the motor to drive the fan 40. The fan 40 is thus activated and air is drawn into the hand dryer 10 via the air inlet 44 at a rate of approximately 20 to 40 litres per second and preferably at a rate of least 25 to 27 litres per second, more preferably air is drawn into the hand dryer 10 at a rate of 31 to 35 litres per second. The air passes through the filter 46 and along the fan inlet 42 to the fan 40. The airflow leaving the fan 40 is divided into two separate airflows; one passing along the front air duct 50 to the slot-like opening 60 and the other passing along the rear air duct 52 to the slot-like opening 62.

[0017] The airflow is ejected from the slot-like openings 60, 62 in the form of very thin, stratified sheets of high velocity, high pressure air. As the airflows leave the slot-like openings 60, 62, the air pressure is at least 15 kPa and preferably approximately 22 to 23 kPa.

[0018] Furthermore, the speed of the airflow leaving the slot-like openings 60, 62 is at least 80 m/s and preferably at least 100 or 150 m/s, more preferably approximately 180m/s. Because the size of the slot-like opening 62 located at the end of the rear duct 52 is greater than the size of the slot-like opening 60 located at the end of the front duct 50, a larger volume of air is emitted from the duct 52 than from the duct 50. This provides a greater mass of air for drying the backs of the user's hands which is advantageous.

[0019] The two thin sheets of stratified, high velocity, high pressure air are directed towards the surfaces of the user's hands which, during use, are inserted fully into the cavity 30 and are subsequently withdrawn from the cavity 30 via the cavity entrance 32. As the user's hands pass into and out of the cavity 30, the sheets of air blow any existing water off the user's hands. This is achieved reliably and effectively because of the high momentum of the air leaving the slot-like openings 60, 62 and because the airflow is evenly distributed along the length of each slot-like opening 60, 62.

[0020] Each stratified sheet of air is directed towards the wall of the cavity 30 which is remote from the slot-like opening through which the respective sheet of air is emitted. Because the slot-like openings 60, 62 are also inclined towards the lowermost end of the cavity 30, the emitted airflows are directed into the cavity 30. This reduces the risk of turbulent air movement being felt by the user outside the casing, eg in the user's face.

[0021] It is envisaged that it will take only a small number of "passes" of the hand dryer described above to dry a user's hands to a satisfactory degree. (By "pass", we mean a single insertion of the hands into the cavity and subsequent removal therefrom at a speed which is not unacceptable to an average user. We envisage that a single pass will have a duration of no more than 3 seconds.) The momentum achieved by the airflows is sufficient to remove the majority of water found on the surface of the user's hands after washing during a single pass.

[0022] The water removed by the airflows is collected inside the cavity 30. Each airflow will rapidly lose its momentum once it has passed the user's hands and the water droplets will fall to the lower end of the cavity 30 under the forces of gravity whilst the air exits the cavity 30 either through the cavity entrance 32 or via the open sides of the cavity 30. The water, however, is collected by the drain 38 and passed to a reservoir (not shown) where it is collected for disposal. The reservoir can be emptied manually if desired. Alternatively, the hand dryer 10 can incorporate some form of water dispersal system including, for example, a heater for evaporating the collected water into the atmosphere. The means by which the collected water is dispersed does not form part of the present invention.

[0023] The second embodiment of the invention is identical to the embodiment described above in all respects save that of the width of the slot-like opening 62 located at the end of the rear duct 52. Whereas the width W2 of the slot-like opening 62 is constant in the first embodiment, it is not constant in the second embodiment. A front view of the slot-like opening (shown schematically for clarity) is shown in Figure 7.

[0024] In this second embodiment, the lower edge 62a of the slot-like opening 62 is straight, as it is in the first embodiment. However, the upper edge 62b of the slot-like opening 62 is curved in the central area 1 thereof so that the width of the slot-like opening 62 increases from a minimum width w to a maximum width W. Outside the central area 1, the minimum width w of the slot-like opening 62 is constant and the preferred value of the minimum width w is 0.4mm. The preferred value of the maximum width W is less than twice the value of the minimum width w, in this case 0.7mm.

[0025] In this embodiment, the central area 1 covers substantially one half of the entire length L of the slot-like opening 62. The distance between the upper edge 62b and the lower edge 62a begins to increase at a point approximately one quarter of the way along the slot-like opening 62 from either end thereof. The shape of the upper edge 62b is symmetrical and takes the form of a smooth curve having its highest point in the centre of the slot-like opening.

[0026] In use, the hand dryer according to the second embodiment is capable of emitting an increased mass of air through the centre of the rear slot-like opening 62 in comparison to the first embodiment. This is advantageous because the area of the hands which is often most difficult to dry using this type of hand dryer is that around the thumbs and forefingers. The emission of an increased mass of air in that region of the hands improves the ability of the dryer to dry the hands evenly.

[0027] It will be appreciated that, in this second embodiment, the width of the rear slot-like opening 62 can be varied by altering the shape of either or both edges and that the precise shape of the slot is not limited to that shown in Figure 7.

[0028] In a further alternative embodiment, the slot-like openings 60, 62 can be arranged so that the sheets of air which are emitted therefrom are directed generally along planes which are substantially parallel to one another. This minimises the amount of turbulent flow present inside the cavity 30 whilst the drying apparatus is in use.

[0029] The invention is not intended to be limited to the precise detail of the embodiment described above. Modifications and variations to the detail which do not alter the scope of the invention will be apparent to a skilled reader. For example, the shape of the cavity 30 and its entrance 32 may be altered without departing from the scope of the present invention as defined by claim 1.

Claims

1. Hand drying apparatus having a casing (12), a cavity (30) formed in the casing (12) for receiving an object, a fan (40) located in the casing (12) and capable of creating an airflow, two opposed slot-like openings (60, 62) communicating with the fan and arranged in opposing sides of the casing (12) so as to direct an airflow transversely across the cavity (30), characterised in that the two slot-like openings have different widths and the maximum width being no greater than 1.0 mm.

2. Hand drying apparatus as claimed in claim 1, wherein each slot-like opening (60, 62) has a respective width, wherein the width of the narrowest slot-like opening (60) is at least 0.3 mm.

3. Hand drying apparatus as claimed in claim 2, wherein the width of the widest slot-like opening (62) is no more than 0.7 mm.

4. Hand drying apparatus as claimed in any one of the preceding claims, wherein the velocity of the airflow emitted through the slot-like openings (60, 62) is at least 80 m/s.

5. Hand drying apparatus as claimed in claim 4, wherein the velocity of the airflow emitted through the slot-like openings (60, 62) is at least 100 mls.

6. Hand drying apparatus as claimed in claim 5, wherein the velocity of the airflow emitted through the slot-like openings (60, 62) is at least 150 m/s.

7. Hand drying apparatus as claimed in claim 6, wherein the velocity of the airflow emitted through the slot-like openings (60, 62) is approximately 180 m/s.

8. Hand drying apparatus as claimed in any one of the preceding claims, wherein the pressure of the airflow emitted through the slot-like openings (60, 62) is at least 15 kPa.

9. Hand drying apparatus as claimed in claim 8, wherein the pressure of the airflow emitted through the slot-like openings is at least 22 kPa.

10. Hand drying apparatus as claimed in any one of the preceding claims, wherein one of the two slot-like openings has a constant width along its length.

11. Hand drying apparatus as claimed in any one of claims 1 to 9, wherein one of the two slot-like openings has a width which varies along its length.

12. Hand drying apparatus as claimed in claim 11, wherein one of the two slot-like openings has a width which is greatest at its centre.

13. Hand drying apparatus as claimed in claim 11 or 12, wherein the maximum width of said one of the two slot-like openings is less than twice the minimum width thereof.

14. Hand drying apparatus as claimed in claim 13, wherein substantially half of the length of said one of the two slot-like openings has a width which is greater than the minimum width.

15. Hand drying apparatus as claimed in any preceding claim, wherein a first one (60) of said two slot-like openings is in a front wall (14) of the cavity (30) and a second one (62) of said two slot-like openings (60, 62) is in a rear wall (16) of the cavity (30), and wherein the width of the first one (60) of the two slot-like openings is smaller than the width of a second one (62) of the two slot-like openings (60, 62).

16. Hand drying apparatus as claimed in any preceding claim, wherein the opposed slot-like openings (60, 62) are arranged such that, in use, the airflows emitted therethrough are inclined towards the innermost end of the cavity (30).

17. Hand drying apparatus as claimed in any one of claims 1 to 15, wherein the opposed slot-like openings are arranged such that, in use, the airflows emitted therethrough are substantially parallel to one another.

Ansprüche

1. Handtrocknungsvorrichtung, die ein Gehäuse (12), einen Hohlraum (30), der in dem Gehäuse (12) geformt ist, um einen Gegenstand aufzunehmen, einen Ventilator (40), der in dem Gehäuse (12) angeordnet und dazu in der Lage ist, einen Luftstrom zu erzeugen, zwei einander gegenüberliegende schlitzartige Öffnungen (60, 62), die mit dem Ventilator in Verbindung stehen und in einander gegenüberliegenden Seiten des Gehäuses (12) angeordnet sind, um so einen Luftstrom quer durch den Hohlraum (30) zu leiten, hat, dadurch gekennzeichnet, dass die zwei schlitzartigen Öffnungen unterschiedliche Breiten haben und die maximale Breite nicht größer als 1,0 mm ist.

2. Handtrocknungsvorrichtung nach Anspruch 1, wobei jede schlitzartige Öffnung (60, 62) eine jeweilige Breite hat, wobei die Breite der schmalsten schlitzartigen Öffnung (60) wenigstens 0,3 mm beträgt.

3. Handtrocknungsvorrichtung nach Anspruch 2, wobei die Breite der breitesten schlitzartigen Öffnung (62) nicht mehr als 0,7 mm beträgt.

4. Handtrocknungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei die Geschwindigkeit des durch die schlitzartigen Öffnungen (60, 62) emittierten Luftstroms wenigstens 80 m/s beträgt.

5. Handtrocknungsvorrichtung nach Anspruch 4, wobei die Geschwindigkeit des durch die schlitzartigen Öffnungen (60, 62) emittierten Luftstroms wenigstens 100 m/s beträgt.

6. Handtrocknungsvorrichtung nach Anspruch 5, wobei die Geschwindigkeit des durch die schlitzartigen Öffnungen (60, 62) emittierten Luftstroms wenigstens 150 m/s beträgt.

7. Handtrocknungsvorrichtung nach Anspruch 6, wobei die Geschwindigkeit des durch die schlitzartigen Öffnungen (60, 62) emittierten Luftstroms annähernd 180 m/s beträgt.

8. Handtrocknungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei der Druck des durch die schlitzartigen Öffnungen (60, 62) emittierten Luftstroms wenigstens 15 kPa beträgt.

9. Handtrocknungsvorrichtung nach Anspruch 8, wobei der Druck des durch die schlitzartigen Öffnungen (60, 62) emittierten Luftstroms wenigstens 22 kPa beträgt.

10. Handtrocknungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei eine der zwei schlitzartigen Öffnungen eine gleichbleibende Breite längs ihrer Länge hat.

11. Handtrocknungsvorrichtung nach einem der Ansprüche 1 bis 9, wobei eine der zwei schlitzartigen Öffnungen eine Breite hat, die sich längs ihrer Länge verändert.

12. Handtrocknungsvorrichtung nach Anspruch 11, wobei eine der zwei schlitzartigen Öffnungen eine Breite hat, die am größten an ihrer Mitte ist.

13. Handtrocknungsvorrichtung nach Anspruch 11 oder 12, wobei die maximale Breite der einen der zwei schlitzartigen Öffnungen geringer ist als die doppelte minimale Breite derselben.

14. Handtrocknungsvorrichtung nach Anspruch 13, wobei im Wesentlichen die Hälfte der Länge der einen der zwei schlitzartigen Öffnungen eine Breite hat, die größer ist als die minimale Breite.

15. Handtrocknungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei sich eine erste (60) der zwei schlitzartigen Öffnungen (60, 62) in einer Vorderwand (14) des Hohlraums (30) befindet und sich eine zweite (62) der zwei schlitzartigen Öffnungen (60, 62) in einer Rückwand (16) des Hohlraums (30) befindet und wobei die Breite der ersten (60) der zwei schlitzartigen Öffnungen (60, 62) kleiner ist als die Breite einer zweiten (62) der zwei schlitzartigen Öffnungen (60, 62).

16. Handtrocknungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei die einander gegenüberliegenden schlitzartigen Öffnungen (60, 62) derart angeordnet sind, das bei Anwendung die durch dieselben emittierten Luftströme zum innersten Ende des Hohlraums (30) hin geneigt sind.

17. Handtrocknungsvorrichtung nach einem der Ansprüche 1 bis 15, wobei die einander gegenüberliegenden schlitzartigen Öffnungen derart angeordnet sind, das bei Anwendung die durch dieselben emittierten Luftströme im Wesentlichen parallel zueinander sind.

Revendications

1. Appareil sèche-mains, comportant un boîtier (12), une cavité (30) formée dans le boîtier (12) pour recevoir un objet, un ventilateur (40) agencé dans le boîtier (12) et capable de produire un écoulement d'air, deux ouvertures en forme de fente opposées (60, 62), communiquant avec le ventilateur et agencées dans des côtés opposés du boîtier (12), de sorte à diriger un écoulement d'air de manière transversale à travers la cavité (30), caractérisé en ce que les deux ouvertures en forme de fente ont des largeurs différentes, la largeur maximale n'étant pas supérieure à 1,0 mm.

2. Appareil sèche-mains selon la revendication 1, dans lequel chaque ouverture en forme de fente (60, 62) a une largeur respective, la largeur de l'ouverture en forme de fente la plus étroite (60) correspondant à au moins 0,3 mm.

3. Appareil sèche-mains selon la revendication 2, dans lequel la largeur de l'ouverture en forme de fente la plus large (62) n'est pas supérieure à 0,7 mm.

4. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 80 m/s.

5. Appareil sèche-mains selon la revendication 4, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 100 m/s.

6. Appareil sèche-mains selon la revendication 5, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 150 m/s.

7. Appareil sèche-mains selon la revendication 6, dans lequel la vitesse de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à environ 180 m/s.

8. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel la pression de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 15 kPa.

9. Appareil sèche-mains selon la revendication 8, dans lequel la pression de l'écoulement d'air émis à travers les ouvertures en forme de fente (60, 62) correspond à au moins 22 kPa.

10. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel une des deux ouvertures en forme de fente a une largeur constante le long de sa longueur.

11. Appareil sèche-mains selon l'une quelconque des revendications 1 à 9, dans lequel une des deux ouvertures en forme de fente a une largeur qui varie le long de sa longueur.

12. Appareil sèche-mains selon la revendication 11, dans lequel une des deux ouvertures en forme de fente a une largeur qui est maximale au niveau de son centre.

13. Appareil sèche-mains selon les revendications 11 ou 12, dans lequel la largeur maximale de ladite une ouverture des deux ouvertures en forme de fente représente moins du double de sa largeur minimale.

14. Appareil sèche-mains selon la revendication 13, dans lequel pratiquement la moitié de la longueur de ladite une ouverture des deux ouvertures en forme de fente a une largeur supérieure à la largeur minimale.

15. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel une première ouverture (60) desdites deux ouvertes en forme de fente se trouve dans une paroi avant (14) de la cavité, une deuxième ouverture (62) desdites deux ouvertures en forme de fente (60, 62) se trouvant dans une paroi arrière (16) de la cavité (30), la largeur de la première ouverture (60) des deux ouvertures en forme de fente étant inférieure à la largeur d'une deuxième ouverture (62) des deux ouvertures en forme de fente (60, 62).

16. Appareil sèche-mains selon l'une quelconque des revendications précédentes, dans lequel les ouvertures en forme de fente opposées (60, 62) sont agencées de sorte qu'en service, les écoulements d'air émis à travers elles sont inclinés vers l'extrémité interne extrême de la cavité (30).

17. Appareil sèche-mains selon l'une quelconque des revendications 1 à 15, dans lequel les ouvertures en forme de fente opposées sont agencées de sorte qu'en service, les écoulements d'air émis à travers elles sont pratiquement parallèles.

Drawing