US 20050100436 A1
A hand-drying device is disclosed. The hand-drying device includes a volute defining a spiral air passage, the volute comprising a spiral conduit for air, the conduit having an input at its center, a peripheral output, and a cross section that increases from the input to the output. The hand-drying device further includes a motor, located at the center of the volute and connected to the input of the volute for pulling in air from the environment at an input velocity and for passing the air through a the volute input to the volute output to expel the air at an output velocity that is greater than the input velocity. The spiral conduit comprises a cross-section that increases progressively from the input to the output.
1. A hand-drying device, comprising:
a volute defining a spiral air passage, the volute comprising a spiral conduit for air, the conduit having an input at its center, a peripheral output, and a cross section that increases from the input to the output; and
a motor, located at the center of the volute and connected to the input of the volute for pulling in air from the environment at an input velocity and for passing the air through a the volute input to the volute output to expel the air at an output velocity that is greater than the input velocity;
wherein the spiral conduit comprises a cross-section that increases progressively from the input to the output.
2. The hand-drying device of
3. The hand-drying device of
4. The hand-drying device of
5. The hand-drying device of
6. The hand-drying device according to
7. A method for providing a stream of air for drying hands, the method comprising:
pulling environmental air into an input of a volute; and
passing the environmental air through a volute having a cross section that increases from the input to its output.
8. The method of
Applicant claims priority of Spanish Patent Application No. P200301954, filed Aug. 13, 2003.
The invention disclosed broadly relates to the field of hand drying devices, and more particularly relates to a reduced-dimension hand-drying device.
Known hand dryer devices generally include a fairly powerful motor to draw in and expel an amount of air sufficient to fulfill the purpose of drying hands. Such a motor consumes a certain amount of electricity and is of a certain size, which has an effect of generally requiring a fairly powerful motor to draw in and expel an amount of air sufficient to fulfill the purpose. This has an effect on the overall size of the device, of requiring complex configurations which, to make the size smaller, have an adverse impact on the performance of the device. Therefore, there is a need for a hand dryer device that overcomes these detriments.
Briefly, the claimed invention relates to a hand-drying device of the type that includes a turbine powered by a motor for drawing in outside (environmental) air and, after passing the air through a volute, expelling it at a higher speed through an air outflow duct. The device includes a volute in whose air intake area the turbine-motor assembly is located. The volute has from its initial point, coiling around the turbine's centrifugal impeller, a spiral configuration whose cross section widens progressively up to the point where it connects with the air outflow duct. The duct ends in a progressively narrowing segment that ends in an air outlet nozzle. This configuration makes it possible for the hand dryer device to have reduced dimensions and power consumption, in addition to leveraging to the maximum fluid-dynamic performance.
The above-mentioned air intake area or opening 2 is tilted peripherally towards the inside of the volute 1 and has a variable width, being wider at the front-end and narrower at the mouth of the impeller 4 (see also
The duct 8 can be straight, and uniformly shaped along its whole length. The duct 8 may have a rectangular shape, as illustrated, or an alternative shape. The interior of the duct 8 comprises a flow-equalization chamber 8′ that minimizes the blockage therein of the outgoing air using a heating element 9 and multiple transverse and parallel fins 10′ incorporated into the chamber 8′ (see
In an embodiment of the present invention, the volute 1 and the impeller 4 include a double intake. The device is mounted in a suitable housing for holding the components of the device. The housing is fastened to a pertinent wall or partition through the device. The housing includes a flat, quadrangular vertical base 13 consisting of an expanded lateral face of the volute-duct assembly 1, 8 (see
Although specific embodiments of the invention have been disclosed, those having ordinary skill in the art will understand that changes can be made to the specific embodiments without departing from the spirit and scope of the invention. The scope of the invention is not to be restricted, therefore, to the specific embodiments. Furthermore, it is intended that the appended claims cover any and all such applications, modifications, and embodiments within the scope of the present invention.