ES2323704T3 - DRY-HAND DEVICE. - Google Patents

Abstract

This device is of the type that comprises a turbine driven by a motor through which it draws ambient air and, after passing it through a volute, expels it at a higher speed through an outlet duct, and is characterized in that the volute (1) , in whose air intake zone (2) the motor-turbine group (3) is housed, presents from its beginning (6), surrounding the centrifugal impeller (4) of the turbine, a spiral configuration (7) that increases progressively its section until it is connected to the outlet duct (8), which is topped with a progressive throttle (11) that ends with the air outlet mouth (12), allowing all this to be the device of dimensions and reduced consumption and, in addition, take full advantage of fluid-dynamic performance.

Description

Hand-dry device

Object of the invention

The present invention aims at a hand-drying device of reduced dimensions.

Field of the Invention

This device is of the type comprising a turbine that, driven by a motor, aspirates ambient air doing it  pass through an enclosure or volute followed by an air duct that Expel at high speed through an outlet. He device has been developed primarily for application as a hand dryer for those installed in the washbasins of many companies and in those of many public establishments, and that it will be mounted, like the existing ones, in a convenient body constituted by a base and a cover, being able to conform the base One piece with the scroll or part of it.

Background of the invention

Known devices of that type they generally comprise a motor of a certain power to aspirate and expel the amount of air that is sufficient to fulfill its objective, producing said engine a certain consumption, being also of a certain size that affects the overall size of the device, having to resort, in general, to complex configurations that aim to reduce This size penalizes its benefits.

The request is known in the prior art Japanese Patent No. JP-A-9 098 908 and FR-A1-2 297 387 describing a hand dryer device that includes an engine, a turbine and a volute inside where the flow of heated air is Headed out. However, it has been shown that this type of volute used, due to its cross section presents a loss of air flow that reduces the efficiency of the device.

The problem underlying the present invention is Overcome this inconvenience.

Summary of the invention

The problem is solved with a device that It is defined in claim 1.

With the device object of this invention, maximum utilization is achieved in terms of fluid-dynamic performance, based on some reduced dimensions and consumption, providing the engine in the air intake so that the suction itself favors the cooling of the same and characterized mainly said device by spiral scroll configuration on the side and admission, allowing the entry of air despite the small dimensions and group location turbine engine in the intake zone of said air.

Said spiral configuration represents a progressive increase in the size of the section of said scroll from its beginning and surrounds the centrifugal impeller constituting the turbine until connected to the air outlet duct, which is of constant section until finished with a progressive throttling which ends with the outlet of said air.

This outlet is of smaller section than the duct from which it comes, conforming the duct by a smooth and progressive strangulation, without sharp or angular changes of the section through the air.

Advantageously, the air outlet duct it is constituted by a section that is extension of the volute and whose interior forms, in the part of constant section, a camera in which a heating resistor is mounted so that the air expelled by the device be hot, minimizing this camera the blockage of the outgoing air due to the incorporation of said resistance and minimizing pressure losses.

After completion of section section constant or "chamber" nerves are arranged guidelines that constitute a grid, interposed between the heating resistance and the choking of the duct exit, whose progressive decrease of section allows the progressive channeling of the air and its concentration, increasing its speed and obtaining, at the outlet, a concentrated and fast air flow.

These and other features will come off better than the detailed description that follows, which, to facilitate your understanding, a set of drawings of an embodiment is accompanied practice that is cited only as a non-limiting example of Scope of the present invention.

Brief description of the drawings

In the drawings:

Figure 1 shows a schematic view in side elevation of a hand-dry device according to the invention, with a cross section as shown in the line A-A of Figure 4.

Figure 2 shows a schematic view in front elevation of the same without the engine.

Figure 3 is a schematic sectional view. cross section of the hand dryer as indicated by the line section B-B in figure 1.

Figure 4 illustrates a schematic view in Plant said device without the engine.

Figure 5 shows a perspective view schematic of it without the group turbine engine.

Description of an embodiment

According to such figures, the device illustrated hand-dryer consists of an enclosure or scroll (1) simple input that presents eccentrically on one side, the zone or opening (2) for admission or entry of ambient air and, staying in it, a motor-turbine group (3) to the aspiration of said air, being arranged in impeller centrifugal (4), also single input, inside the volute (1) so that the motor (5) protrudes from it (see figure 3).

The indicated opening or zone (2) is peripherally bent inward of the scroll (1) and presents a variable width that, of greater dimension in its beginning and less to the impeller inlet (4) (figures 3 and 5) minimizes the blockage to the air intake due to the presence of the engine (5).

The scroll (1) presents, from its beginning (6), a spiral configuration (7) whose section around the impeller (4) (figure 1) increases progressively in size and, at its completion (7 '), connects with a duct (8) where the air will come out aspirated, said duct may be constituted (as it has been illustrated) by an extension of the scroll (1).

These characteristics are shown with greater clarity in figure 3 where section "C" is larger than the "D" section.

This duct (8) is straight, and has a constant section (which can be rectangular as illustrated or in any other way) along its entire length, and conforms internally a calming chamber (8 ') that minimizes the blockage, in it, of the outgoing air due to a resistance heater (9) and some transverse and parallel nerves (10 ') that said chamber incorporates (figure 1), these forming a grid (10) that is arranged between the element (9) and an area of progressive throttling (11) that is connected to the end of the duct (8).

This throttling zone, which does not have sharp edges and, at its end, defines the outlet (12) for the air, it allows the progressive channeling of the same and its concentration abroad, reducing the level of turbulence and minimizing pressure losses, and may be the one indicated rectangular mouth (as illustrated) or any other shape.

As can be understood, the scroll (1) and the impeller (4) can be double entry and, in any case, the device will be mounted on a suitable body (not illustrated) that will support its parts and will be fixed to the relevant wall or wall through it, comprising said body, in the example shown, a vertical quadrangular flat base (13) formed by an expanded side face of the set of duct-volute (1, 8) (figures 1 and 4), being said face the opposite of the one in which the admission zone (2) of the ambient air, and presenting the base (13) suitable openings (14) for the indicated fixation.

The invention, within its characteristics essential, can be implemented in other embodiments that differ only in detail from the indication only by way as an example and that they will also have the claimed protection.

Claims (3)

1. A hand-drying device comprising a motor, which acts on a turbine to aspirate air at room temperature and, after passing them through a volute (1), expels it at a higher speed through an outlet duct (8) , in which the volute (1), in whose air intake zone a motor-turbine group (5) is housed, presents from its beginning and surrounding the centrifugal impeller a spiral configuration on the suction side, characterized by the fact that the cross-section of the volute, in width and height simultaneously, gradually increases in size until it connects to the outlet duct, which ends with a progressive throttling (11) that ends with the air outlet (12). 2. A hand-dried device according to claim 1, characterized in that the outlet duct (8) is constituted by a section which is an extension of the volute and which, prior to the throttling and the subsequent outlet opening, presents a constant section throughout its length, whose interior forms a chamber (8 ') in which a heating resistor (9) is mounted and at the end of the chamber, directional ribs (10') are incorporated by means of a grid (10). 3. A hand-dried device according to claim 2, characterized in that the air outlet duct of the duct (8) is of smaller section (11) than the duct from which it proceeds, the ducting being formed by a smooth and progressive throttling, without abrupt or angular changes in the section through the air.