Hair dryer

Abstract

A hair dryer with a nozzle designed to effectively spread out the wetted hair strands for enhanced drying capability. The nozzle is configured to have its interior space divided into a plurality of individual ducts by a separation plane extending radially about a center axis. A weak flow zone where no direct air flow is given from the nozzle is formed downstream of the separation plane and between strong flow zones respectively formed downstream of the individual ducts to flow the forced air flow directly therefrom. With the provision of the localized strong flow zones separated by the weak flow zone, the nozzle can develop a waved air flow of varying flow rate, thereby enabling to spread out the wetted hair strands and therefore increase chances of exposing the hair to the air flow for expediting the hair drying.

1 . A hair dryer comprising:
 a tubular casing with a flow channel extending along an axis of said casing;   a blower mounted within said casing to generate a forced air flow directed through said flow channel;   a tubular nozzle disposed at one axial end of said casing in communication with said flow channel to discharge said forced air flow out through a discharge end, said nozzle having its center axis aligned with the axis of said casing;   characterized in that   said nozzle is configured to have its interior space divided into a plurality of individual ducts by a separation plane extending radially about said center axis.   
     
     
         2 . A hair dryer as set forth in  claim 1 , wherein
 said nozzle includes a partition which extends in said separation plane to divide said interior space into two said ducts.   
     
     
         3 . A hair dryer as set forth in  claim 1 , wherein
 each of said ducts is tapered to have its opening narrower towards said discharge end than at its opposite axial end.   
     
     
         4 . A hair dryer as set forth in  claim 2 , wherein
 each of said ducts has its inner side wall which is defined by said partition to give a flat face at a downstream portion of said inner side wall, said flat face extending in parallel with said separation plane.   
     
     
         5 . A hair dryer as set forth in  claim 2 , wherein
 each of said ducts has its opening elongated along a diameter of said nozzle.   
     
     
         6 . A hair dryer as set forth in  claim 1 , wherein
 said nozzle is additionally provided with a vent disposed outwardly of said ducts.   
     
     
         7 . A hair dryer as set forth in  claim 6 , wherein
 said casing includes an inner barrel which defines therein said flow channel and defines an outer flow channel between said inner barrel and said casing,   said ducts being configured to receive said forced air flow through said flow channel,   said vent being configured to receive said forced air flow through said outer flow channel, and   a heater being provided within one of said flow channel and said outer flow channel.   
     
     
         8 . A hair dryer as set forth in  claim 6 , wherein
 said vent is configured to have its opening narrower towards said discharge end along said center axis than at an opposite axial end.   
     
     
         9 . A hair dryer as set forth in  claim 8 , wherein
 said vent is configured to converge towards a point downstream of the discharge end of said nozzle.   
     
     
         10 . A hair dryer as set forth in  claim 7 , wherein
 said vent is configured to have its opening narrower towards said discharge end along said center axis than at an opposite axial end.   
     
     
         11 . A hair dryer as set forth in  claim 10 , wherein
 said vent is configured to converge towards a point downstream of the discharge end of said nozzle.