CN1169845A - electric hair dryer - Google Patents

Abstract

The object of the present invention is to provide an electric blower, which can reduce the loss of airflow sucked by the fan and has higher blowing efficiency. The electric blower comprises: a fan 6 driven to rotate by the motor 1, a guide vane 9 for sending the airflow inhaled by the fan 6 into the motor 1 is fixed, and a bracket 5 with a fan cover 10 covering the fan is fixed at the outer edge, fixed on On the bracket 5, there is an exhaust hole 4a for discharging the airflow sent by the guide vane 9, and a motor bracket 4 for fixing the motor 1 inside, and a plurality of motor brackets 4 arranged on the top surface of the bracket 5 on the side of the motor bracket 4 Exhaust hole 5a; the airflow inhaled by the above-mentioned fan 6 can be discharged from the exhaust holes 4a, 5a of the bracket 6 and the motor bracket 4, respectively.

Description

electric hair dryer

The present invention relates to electric blowers for electric vacuum cleaners and the like.

Fig. 4 is a sectional view showing a conventional electric hair dryer. Number 1 is a motor, which includes a motor bracket 4 and a bracket 5, etc. The motor bracket 4 has an exhaust hole 4a, and a stator 2 and a rotor 3 that can rotate at a high speed are arranged inside it. The bracket 5 is fixed on the motor bracket 4 superior. Number 6 is a fan, which is fixed on the shaft 7 of the rotor 3 through a nut 8 and rotates together with the rotor 3 . Reference numeral 9 is a guide vane, which includes a diffuser portion 9a that regulates the air flow sucked by the above-mentioned fan 6 and a return guide 9b that guides the air flow to the motor 1 . Number 10 is a fan cover, which covers the above-mentioned fan 6 and is pressed into and fixed in the bracket 5 .

According to the existing electric hair dryer with the above structure, the airflow drawn from the hair dryer turns 180 degrees through the fan cover and the peripheral inner wall of the bracket as shown in the direction of the arrow in the figure, all passes through the inside of the motor, and finally is discharged from the exhaust hole in the motor bracket. Therefore, when the airflow turns 180 degrees through the fan cover and the peripheral inner wall of the bracket, pressure loss will occur, resulting in low blowing efficiency.

The present invention is proposed in order to solve the above problems. The purpose of the present invention is to provide an electric blower, which can reduce the pressure loss caused by the non-directional flow of the airflow sucked from the fan through the fan cover and the peripheral inner wall of the bracket. Small and has high blowing efficiency.

The electric blower of the present invention includes: a fan driven by a motor to rotate, the airflow sucked by the fan is sent into the guide vane in the motor, the above guide vane is fixed and the fan cover covering the fan is fixed on the upper bracket on the outer edge, fixed on the On the bracket, there is an exhaust hole for discharging the airflow sent by the guide vanes, and a motor bracket that fixes the motor inside. It is characterized in that a plurality of row Air holes, the airflow sent by the above-mentioned fans is discharged from the air vents in the bracket and the motor bracket respectively.

In addition, the total area of the exhaust holes provided on the top surface of the bracket on the motor bracket side is smaller than the total area of the exhaust holes in the motor bracket.

In addition, the electric hair dryer of the present invention includes: a fan driven to rotate by a motor, a guide vane having a return guide member for sending the airflow sucked by the fan into the motor, fixing the above guide vane and fixing a fan cover covering the fan on the outer edge The bracket is fixed on the bracket, has an exhaust hole for discharging the airflow sent by the guide vane, and fixes the motor inside the motor bracket. It is characterized in that on the top surface of the motor bracket side of the bracket A plurality of exhaust holes are provided on the bracket, and the peripheral side edge of the exhaust hole on the bracket is basically the same as the peripheral side end of the return guide. Vent discharge.

Fig. 1 is a sectional view showing an electric hair dryer according to a first embodiment of the present invention;

Fig. 2 is a perspective view showing the electric hair dryer of the first embodiment of the present invention;

3 is a plan view showing an electric hair dryer according to a second embodiment of the present invention;

Fig. 4 is a sectional view showing a conventional electric hair dryer.

FIG. 1 is a sectional view showing an electric hair dryer according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing an electric hair dryer according to a first embodiment of the present invention. In the figure, numeral 1 is a motor, which includes a stator 2, a high-speed rotating rotor 3, a motor bracket 4 and a bracket 5, etc., the bracket 4 has an exhaust hole 4a, and the motor 1 is fixed, and the bracket 5 is fixed A plurality of exhaust holes 5 a are opened on the motor bracket 4 and on the top surface of one side of the motor bracket 4 . Number 6 is a fan, which is fixed on the shaft 7 of the rotor 3 of the motor 1 through a nut 8 and can rotate together with the rotor 3 . Reference numeral 9 is a guide vane, which includes a diffuser portion 9a that adjusts the air flow sucked from the above-mentioned fan 6 and a return guide 9b that guides the air flow to the motor 1 . Number 10 is a fan cover, which covers the above-mentioned fan 6 and is pressed into and fixed on the bracket 5 .

In addition, the total area of the exhaust holes 5a of the bracket 5 is slightly smaller (corresponding to 70-80%) than the total area of the exhaust holes 4a of the motor bracket 4 .

In the electric hair dryer with the above structure, if the motor 1 is driven, the rotor 3 and the fan 6 mounted on the shaft 7 rotate, and the airflow drawn from the fan 6 passes through the inside of the fan 6 as shown by the arrow in the figure, and then passes through the The diffuser 9a in the guide vane 9 is adjusted, and finally divided into two airflows, one of which is turned by about 90 degrees through the fan cover 10 and the peripheral inner wall of the bracket 5 and discharged from the exhaust hole 5a of the bracket 5, while the other The stream of air then turns to 180 degrees and is introduced into the inside of the motor 1 through the return guide 9b of the guide vane, and it is discharged from the exhaust hole 4a of the motor bracket 4 while cooling the motor 1 . At this time, according to the experimental results, it is known that about half of the airflow sucked by the fan 6 is discharged from the exhaust hole 5 a of the bracket 5 having a small angle.

Therefore, compared with the existing embodiment, that is, the air flow is sucked in by the fan, then turned 180 degrees, and sent all to the motor bracket side, the pressure loss of the turning part of the above-mentioned embodiment of the present invention is small, and the blowing effect is high.

In addition, since the total area of the exhaust holes 5a in the bracket 5 is smaller than the total area of the exhaust holes 4a in the motor bracket 4, the exhaust resistance of the exhaust holes 4a in the motor bracket 4 is small, and the air sucked from the fan The air flow easily flows into the motor bracket 4 side where the exhaust resistance is small, so that the temperature rise of the motor can be suppressed.

In addition, although the airflow flowing into the motor bracket 4 is less, the cooling efficiency is reduced to a certain extent, but the experimental results are still within the temperature range of the characteristic conditions of the motor.

In addition, by allowing the airflow discharged from the exhaust hole 5a of the bracket 5 to be exhausted along the side of the motor bracket 4, and providing a guide or the like at the exhaust hole 5a of the bracket 5, the temperature rise of the motor can be prevented.

Fig. 3 is a plan view showing an electric hair dryer according to a second embodiment of the present invention. In the figure, reference numeral 5 is a bracket having an exhaust hole 5a. Reference numeral 9b is a return guide, which can send the airflow sucked by the fan into the inside of the motor 1, and the guide is arranged on the guide vane. The peripheral side edge 12 of the exhaust hole 5a provided on the bracket 5 is substantially the same as the peripheral side end portion 11 of the return guide.

In the electric hair dryer with the above structure, the airflow drawn from the fan passes through the diffuser part 9a of the guide vane 9, and the airflow turned by the peripheral inner wall of the fan cover 10 and the bracket 5 will retain the rotating part, so that the airflow from the exhaust hole of the bracket 5 The air flow discharged from 5 a hits the inner wall of the return guide 9 b of the guide vane 9 .

Since the turning angle of the airflow discharged from the exhaust hole 5a is small, the airflow is equivalent to about half of the airflow sucked in by the fan, which is compared with the situation that the airflow sucked in by the fan turns 180° and is all sent to the motor bracket side. Compared with that, the pressure loss of the turning part of this embodiment can be reduced by half, and higher blowing efficiency can be obtained.

In addition, since the peripheral side edge 12 of the exhaust hole 5a provided on the bracket 5 is substantially the same as the peripheral side end 11 of the return guide member, the airflow colliding with the inner wall of the return guide member 9b of the guide vane 9 can be returned along the return direction. The inner edge 13 of the guide 9b flows into the side of the motor bracket 4, which prevents the temperature of the motor from rising.

According to the present invention, the electric blower includes: a fan driven to rotate by a motor, a guide vane for sending the airflow inhaled by the fan into the motor, a bracket for fixing the guide vane and a fan cover covering the fan on the outer edge, fixing On the bracket, there is an exhaust hole for discharging the airflow sent by the guide vanes, and a motor bracket that fixes the motor inside; in the electric hair dryer, there is a A plurality of exhaust holes, the airflow sent by the above-mentioned fan can be discharged from the exhaust holes in the above-mentioned bracket and the above-mentioned motor bracket respectively, so that such an electric blower can be obtained, wherein the airflow sucked by the fan passes through the fan cover and The pressure loss caused by the non-directional flow when the inner wall around the bracket turns around will be reduced, and the blowing efficiency will be higher.

In addition, since the total area of the exhaust holes provided on the top surface of the bracket on the motor bracket side is smaller than the total area of the exhaust holes in the motor bracket, about half of the airflow drawn by the fan will be diverted from the smaller angle At the same time, the above-mentioned inhaled airflow will easily flow into the side of the motor bracket with less exhaust resistance. As a result, an electric hair dryer with higher blowing efficiency can be formed, and it can also suppress airflow. Rise in motor temperature.

In addition, the electric hair dryer includes: a fan driven to rotate by a motor, a guide vane having a return guide for sending the airflow sucked by the fan into the motor, a holder for fixing the guide vane and a fan cover covering the fan on the outer edge. Bracket, fixed on the bracket, has an exhaust hole for discharging the airflow sent by the guide vanes, and a motor bracket that fixes the motor inside; in this electric hair dryer, the top surface of the motor bracket side of the bracket There are a plurality of exhaust holes on the bracket. The peripheral side edge of the exhaust hole on the bracket is basically the same as the peripheral side end of the return guide. The gas sucked by the above fan can be drawn from the bracket and the motor bracket exhaust holes so that half of the airflow sucked in by the fan exits the exhaust holes in the bracket with a smaller steering angle, and the other half flows along the inner edge of the return guide to the motor bracket side. An electric hair dryer with high blowing efficiency, which can also suppress the increase in motor temperature.

Claims (3)

1. An electric hair dryer, which includes: a fan driven by a motor to rotate, the airflow sucked by the fan is sent to the guide vane in the motor, the guide vane is fixed and the fan cover covering the fan is fixed on the outer edge of the bracket, It is fixed on the bracket, has an exhaust hole for exhausting the airflow sent by the guide vanes, and fixes the motor inside the motor bracket. It is characterized in that a plurality of Exhaust holes, the airflow sent by the above-mentioned fan is discharged from the exhaust holes in the bracket and the motor bracket respectively. 2. The electric hair dryer according to claim 1, wherein the total area of the exhaust holes provided on the top surface of the bracket on the motor bracket side is smaller than the total area of the exhaust holes in the motor bracket. 3 An electric hair dryer, which includes: a fan driven to rotate by a motor, the airflow sucked by the fan is sent into the guide vane with a return guide in the motor, the guide vane is fixed and the fan cover covering the fan is fixed on the outer edge The upper bracket is fixed on the bracket, has an exhaust hole for discharging the airflow sent by the guide vanes, and fixes the motor inside the motor bracket. It is characterized in that the top of the motor bracket side of the bracket There are multiple exhaust holes on the surface, and the peripheral side edge of the exhaust hole on the bracket is basically the same as the peripheral side end of the return guide. The airflow sucked by the above-mentioned fan is respectively from the Vent vent.

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