JPS5893991A - Fan of blower device - Google Patents

Abstract

PURPOSE:To enhance the efficiency of wind sending, by arranging two or more blades radially at the outside circumference of a boss to be installed on the rotary shaft. CONSTITUTION:Two or more blades 11 are arranged radially at the outside circumference of a boss 10 to be installed by pressure on the rotary shaft of a motor 6, where one sides of the wind intake side end-face 12 and the wind discharge side end-face 13 of each blade 11 are inclined so as to face each other as well as the edges of inclination are coupled with the boss 10, to form a space 14 between the boss 10 and the wind discharge side end-face 13 of blade 11. When the fan 9 rotates, a secondary wind flow is generated by the inclined surface in the end face 13 in said space 14, as shown by Arrow D, and this secondary flow sucks in the wind which has flowed in at the end face 12 of the fan 9 toward the end face 13, and leads efficiently to the outside circumference of the motor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fan for an air blower such as a hair dryer.

Conventional fans are shown in Figures 1 and 2 (as shown here).
A substantially conical kite wall 15 is provided around the boss 10 that fixes the rotating shaft 8 of the motor 6 by pressure, and the kite wall 15
A plurality of blade pieces 11 are formed radially around the outer periphery of the motor 6, and the conical guide wall 15 guides the wind in the direction of arrow A. The air flows into the gap between the guide wall 15 and the guide wall 15, causing turbulence in this area, which causes a decrease in air blowing efficiency.

The present invention has been made in 172 to solve the above problems, and its object is to provide a fan for an air blowing device with improved air blowing efficiency.

An embodiment of the present invention will be explained based on FIGS. 3 to 6, which show an example of a hair dryer.

FIG. 3 shows the internal structure of the hair dryer (7), in which a heater 4 and a blower device 5 are disposed within a cylindrical housing 3 that is divided into two halves and has a discharge [11] and a suction [12] at the front and rear ends. The blower device 5 is composed of a motor 6, rectifying blades 7 disposed around the outer circumference of the motor 6, and a fan 9 fixed to the rotation ItqII8 of the motor 6. The fan 9 is shown in FIGS. 3 to 5. As shown, a plurality of blade pieces 11 are provided radially around the outer periphery of a boss 10 that is press-fitted and fixed to the rotating shaft 8 of the motor 6, and the blade pieces 11 have an end face 12 on the air inlet side and an end face 12 on the shoulder outlet side. One side of the end surface 18 is inclined in a direction facing each other, and the inclined end portion is connected to the boss 10, and the blade piece 1
A space 14 is formed between the air outlet side end 18 of the air outlet 1 and the boss 10.

As shown in FIG. 6, when the fan 9 rotates in the direction of the arrow O, a secondary flow of air is caused by the inclined surface of the air outlet end face 13 of the blade piece 11 as shown by the arrow in the space 14G. occurs, and this secondary flow reaches the end face 12 of the fan 9 on the air inlet side.
The air flow (indicated by arrow E in the figure) is sucked into the air outlet side end face 18 of the fan 9 and efficiently guided to the outer periphery of the motor 6, thereby increasing the air volume.

Note that the present invention only needs to generate a secondary flow at the outlet end face 18 of the fan 9, and is not limited to the -F side. An inclined piece 16 corresponding to the inclined part of the end face on the wind outlet side may be formed at the lower part of the kite wall 15 in the example, and a cutout part 17 may be formed in the kite wall 15 in order to make the inflow of wind efficient. Further, as shown in FIG. 9 and FIG. 1θ, a guide wall 15 and a number of ventilation holes 18 may be provided in place of the notch A17 of the above embodiment.

As described above, the present invention includes a plurality of blade pieces arranged radially around the outer periphery of a boss (3) fixed to the rotating shaft of a motor, and one side of the end face on the air inlet side and the end face on the air outlet side of the blade pieces. Since the fan blades are inclined in a direction facing each other and the inclined ends are connected to the boss, a secondary flow is generated at the end face of the fan blade on the air outlet side, and this secondary flow directs the air taken in from the suction port to the motor. It has the effect of efficiently guiding the air toward the discharge port through the outer periphery, thereby improving the air blowing efficiency.

[Brief explanation of the drawing]

The first is a front view showing the internal structure of a hair dryer using a conventional fan; the second is a perspective view of the same fan;
The figure is a front view showing the entire internal structure of a hair dryer using the fan of the embodiment of the present invention, Figure 4 is a perspective view of the fan on IHI, Figure 5 is a top view of the same fan, and Figure 6 is the operating state of the same as above. Fig. 7 is a top view showing a different embodiment, Fig. 8 is a 1gr side view of the same as above, Fig. 9 is a top view of another embodiment, and Fig. 10 is a sectional view of the above. . 60 motor, 80 rotating shaft, lO0 boss, 11... blade piece, 12... end face on the air inlet side, end face on the air outlet side 〇 (4-procedure amendment document c method) April 3, 1980'7. ．． ; To the Commissioner of the Japan Patent Office, 3 colors 1, Indication of the case, 1982 Patent Application No. 19816f3 2, Name of the invention Fan 3 of the blower device, Relationship to the person making the amendment Patent applicant Address Oaza, Kadoma City, Osaka Prefecture 1048 Kadoma Name (5 & 3) Matsushita Electric Works Co., Ltd. Address 1048 Oaza Kadoma, Kadoma City, Osaka Prefecture Patent Division Matsushita Electric Works Co., Ltd. Name C6201) Patent attorney Satoshi Takemoto
Circle 7, Contents of amendment 1), page 4, line 10 of the specification, “The first is...” has been changed to “the first
The figure is...'' 2), page 4, line 20 of the specification, ``... end face on the air inlet side,
``Air outlet side end surface'' is corrected to ``...Air inlet side end surface, taO/Air outlet side end surface.''

Claims (1)

[Claims] 1) 6 A plurality of blade pieces are arranged radially around the outer periphery of a boss fixed to the rotating shaft of the motor, and one side of the end face on the air inlet side and the end face on the air outlet side of the blade pieces are inclined in a direction facing each other. and a fan of an air blower device characterized in that an inclined end portion is connected to the boss.