Patent Publication Number: US-10772407-B2

Title: Hair dryer deflector

Description:
BACKGROUND OF THE INVENTION 
     Field of Invention 
     The present invention relates to a deflector and more particularly to a hair dryer deflector. 
     Description of Related Art 
     As shown in  FIG. 1 , the figure is a perspective view of the current hair dryer. It can be seen from the figure that, a hair dryer  1  sucks air through a fan  11  from an air inlet  13  of a casing  12  into the casing  12 . After the air is raised in temperature by a heating device in the casing  12 , it is blown outward through an air outlet  14  of the casing  12  to provide functions such as drying or shaping to the hair. 
     All the hair dryers currently on the market focus on the intensity of the wind, heating effect or exterior design to enhance the value of the products. However, the traditional hair dryers still have some problems in use. For example, as shown in  FIG. 2 , which is a schematic diagram of a connection between a vertical motor and fan blades of a conventional hair dryer. The high speed rotation of a motor  20  of the current hair dryer will drive a blade  21  of the fan to rotate, thereby generating the heated gas that flows out through a heating device and an outlet of the hair dryer. 
     However, when the conventional hair dryer is continuously used for a long time, the internal temperature of the motor  20  continues to rise, and the heat generated by the heating device causes the motor  20  lacking a good diversion structure to be damaged often due to ineffective diversion. 
     SUMMARY OF THE INVENTION 
     In view of the above-mentioned problems in the prior art, the currently available hair dryer  1  to be equipped with a fan with a good diversion structure should be urgently needed. 
     According to an objective of the present invention, the present invention provides a hair dryer deflector, comprising: a power unit; and an airflow generating unit, the airflow generating unit being connected to one side of the power unit, a plurality of perforations being disposed at the positions of the airflow generating unit relative to the power unit, the airflow generating unit being driven by the power unit to rotate to generate airflow, and the airflow passing through each of the perforations to flow toward the power unit and toward an air outlet of the hair dryer. 
     Wherein the airflow generating unit comprises an upper ring, a lower disk and a plurality of fan blades, the fan blades are disposed between the upper ring and the lower disk, and a protrusion is disposed at the center of the lower disk, each of the perforations is surroundingly disposed around the protrusion. 
     Wherein the protrusion is disposed with a plurality of diversion blocks radially extending from the center of the lower disk, and each of the diversion blocks is higher at an end of the protrusion than at another end of each of the diversion blocks. 
     Wherein the perforations are respectively located at the positions of another end of the lower disk adjacent to the diversion blocks. 
     Wherein the number of the perforations is the same as the number of the fan blades. 
     Wherein the power unit comprises a motor base, a motor and a rotating shaft, wherein the motor base is mounted on a housing of the hair dryer, the motor is disposed on one side of the motor base, and the rotating shaft is disposed on a side of the motor facing away from the motor base, and the rotating shaft is connected with a side of the lower disk facing away from the upper ring. 
     Wherein the distance of each of the fan blades apart from each other is the same. 
     Wherein the airflow generating unit is made of a plastic material. 
     Wherein a plurality of perforations having the same number is disposed around the rotating shaft corresponding to each of the perforations surroundingly disposed around the protrusion. 
     According to the above, the present invention achieves one or more of the following effects: 
     1. The hair dryer deflector provided by the present invention is configured such that by means of the airflow generating unit being driven by the power unit to rotate to generate airflow flowing through each of the perforations to flow toward the power unit and toward the air outlet of the hair dryer, so that the lower temperature airflow generated will reduce the high heat generated by the rotation of the motor, thereby avoiding a situation in which the heating temperature of a heating coil inside the motor cannot be uniformly dissipated. 
     2. The structure of the hair dryer deflector provided by the present invention is simple and it is easy to be installed on the hair dryer. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic perspective view of the current hair dryer; 
         FIG. 2  is a schematic diagram of a connection between a conventional hair dryer vertical motor and fan blades; 
         FIG. 3  is a schematic diagram of a hair dryer deflector according to the present invention; 
         FIG. 4  is a schematic diagram of an airflow generating unit according to the present invention; and 
         FIG. 5  is a schematic diagram of a power unit according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Please refer to  FIG. 3  and  FIG. 4 , a deflector  30  made of a plastic material comprises a power unit  31  and an airflow generating unit  32 . Wherein the airflow generating unit  32  is connected to one side of the power unit  31 , and a plurality of perforations  321  is disposed at the positions of the airflow generating unit  32  relative to the power unit  31 . The power unit  31  drives the airflow generating unit  32  to rotate, so that the airflow generated by the airflow generating unit  32  flows through each of the perforations  321  to flow toward the power unit  31  and toward an air outlet of the hair dryer. 
     The airflow generating unit  32  comprises an upper ring  322 , a lower disk  323 , and a plurality of fan blades  324 . The fan blades  324  are disposed between the upper ring  322  and the lower disk  323 , and the distance of each of the fan blades  324  apart from each other is the same, so that the airflow generated by the airflow generating unit  32  can uniformly flow out of the gaps between each of the fan blades  324 . 
     A protrusion  325  is disposed at the center of the lower disk  323 , and each of the perforations  321  is surroundingly disposed around the protrusion  325 . Wherein the protrusion  325  is disposed with a plurality of diversion blocks  326  radially extending from the center of the lower disk  323 . Each of the diversion blocks  326  is higher at an end of the protrusion  325  than at another end of each of the diversion blocks  326 . The disposed positions of the perforations  321  for the lower disk  323  are such that the perforations  321  are respectively located at the positions of another end of the lower disk  323  adjacent to the diversion blocks  326 , and the number of the perforations  321  is the same as the number of the fan blades  324 . 
     Therefore, the flow directions of the airflow generated when each of the fan blades  324  is driven to rotate by the power unit  31  are first converged to the radial protrusion  325 . Then, the airflow flows into the low end of each of the diversion blocks  326  through the high end of each of the diversion blocks  326 , and the airflow is rapidly introduced into each of the perforations  321  through the low end of each of the diversion blocks  326 . 
     Please refer to  FIG. 5 , the power unit  31  comprises a motor base  311 , a motor  312  and a rotating shaft  313 . Wherein the motor base  311  is mounted on a housing of a hair dryer, and the motor  312  is disposed on one side of the motor base  311 . The rotating shaft  313  is disposed on a side of the motor  312  facing away from the motor base  311 , and the rotating shaft  313  is connected with a side of the lower disk  323  facing away from the upper ring  322 . 
     In order to introduce the airflow into each of the perforations  321  to reduce the temperature of the motor  312  quickly, a plurality of perforations  328  with an amount the same as the number of the perforations  321  is also disposed around the rotating shaft  313  corresponding to the positions of each of the perforations  321  disposed surroundingly around the protrusion  325 . Therefore, the airflow flowed into each of the perforations  321  will reach the surface of the motor  312  via each of the perforations  328 , thereby reducing the high heat generated by the rotation of the motor  312 . 
     In summary, when the hair dryer  1  of  FIG. 1  is needed to dry or shape the hair, in  FIG. 5 , the motor  312  disposed on one side of the motor base  311  receives an external power through a power cable  327 , then the power generated by the motor  312  drives the rotating shaft  313  to rotate, so that the lower disk  323  connected to the rotating shaft  313  also correspondingly and synchronously rotates. Thus the fan blades  324  disposed between the upper ring  322  and the lower disk  323  rotate to generate airflows, the airflows not only uniformly pass through the gaps between each of the fan blades  324 , but also converge at the radial protrusion  325  and are introduced from the high end to the low end of each of the diversion blocks  326 . Then, the airflows flow through each of the perforations  321  and each of the perforations  328  to flow toward the surface of the motor  312  and toward an air outlet  14  of the hair dryer  1 . 
     Therefore, the cooling air generated by the rotation of the fan blades  324  flows through the above-mentioned path to the surface of the motor  312  to reduce the high heat generated by the rotation of the motor  312 , thereby avoiding a situation in which the heating temperature of a heating coil inside the motor  312  cannot be uniformly dissipated. 
     While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.