KR100445649B1 - The motor for a cleaner - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner motor, and more particularly, to a vacuum cleaner motor capable of increasing air cooling efficiency by passing air to a rotor that rotates at a high speed.

The vacuum cleaner motor according to the present invention includes a stator fixed to an inner surface of a motor housing in which a discharge port is formed; A rotor spaced apart from the inside of the stator by a predetermined interval and connected to a rotating shaft for rotating the impeller; It is provided between the stator and the rotor, and the air flows through the impeller to the rotor outer peripheral side while the guide portion for preventing the air flow to the discharge port is installed, so it is blown by the impeller flows into the motor side Air is guided to the discharge port through the rotor by the guide portion, thereby improving the reliability of the motor.

Description

Motor for vacuum cleaner {The motor for a cleaner}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner motor, and more particularly, to a vacuum cleaner motor capable of increasing air cooling efficiency by passing air to a rotor that rotates at a high speed.

In general, a vacuum cleaner is a vacuum cleaner that generates suction power and removes foreign substances such as dust by suction power. Recently, the vacuum cleaner is focused on developing a low noise and high absorption input product.

Figure 1 is a perspective view of a typical vacuum cleaner, Figure 2 is a cross-sectional view taken along line AA of Figure 1, Figure 3 is a cross-sectional view showing a centrifugal blower for a vacuum cleaner according to the prior art, Figure 4 according to the prior art A perspective view of a part of the vacuum cleaner motor is shown.

In general, the vacuum cleaner has a main body 4 in which the dust collecting bag 2 and the centrifugal blower 20, etc. are built, and one end is inserted into the insertion hole 4a of the main body 4, as shown in FIGS. Connecting part 5 and the suction hose 6 is inserted detachably installed, and the handle portion integrally formed on the other end of the suction hose 6 and the control unit 7 for controlling the operation of the cleaner. (8), an extension tube (10) detachably installed at the other end of the handle portion (8), and an inlet portion (12) detachably installed at the other end of the extension tube (10) to suck in dust. It is composed.

Here, the dust collecting bag 2 for filtering dust and the like from the air sucked along the suction passage inside the main body 4 is installed, the rear of the dust collecting bag 2 to generate a suction force that can suck air The centrifugal blower 20 is mounted.

Air passing through the centrifugal blower 20 in this way exits through the exhaust port 4b formed at the rear of the main body 4.

Meanwhile, as shown in FIG. 3, the centrifugal blower 20 is connected to an impeller 24 installed inside the impeller cover 22 having an inlet 22a formed at an upper end thereof, and connected to a lower end of the impeller cover 22. It is composed of a motor 30 installed inside the motor housing 23 in which a plurality of discharge ports 23a are formed to rotate the impeller 24.

In addition, a diffuser 26 is formed between the impeller 24 and the motor 30 to pump air from the outlet of the impeller, and the air compressed by the diffuser 26 is transferred to the motor 30. The disk body 27 in which the guide vane 28 which guides to the side) is formed in the lower side is provided.

In particular, the motor 30 is composed of a stator core 32a fixed to an inner wall of the motor housing 23 and a stator coil 32b wound around the stator core 32a as shown in FIGS. 3 and 4. The rotor core 34a installed on the stator 32, the rotating shaft 29 connected to the impeller 24 at a predetermined interval inside the stator 32, and the rotor coil 34b wound around the rotor core 34a. The rotor 34 and the brush 36 and the commutator are installed on the lower side of the rotor 34, that is, the lower end of the rotary shaft 29 to supply external power to the stator coil 32b and the rotor coil 34b. It consists of 38.

In addition, a motor housing having a guide venturi 25a formed at an upper end of the motor housing 23 to guide the air sucked along the impeller 24, the diffuser 26, and the guide vane 28 toward the high temperature rotor 34. The cover 25 is installed.

Looking at the operation of the prior art configured as described above are as follows.

First, when a current is supplied to the motor 30 through the brush 36 and the commutator 38 by an external power source, a mutual electromagnetic force is generated between the stator 32 and the rotor 34 to generate torque, thereby The rotor 34 installed on the rotation shaft 29 rotates.

Therefore, as the impeller 24 installed on the upper end of the rotating shaft 29 is rotated, air is sucked into the inlet of the impeller 24 through the inlet port 22a, and is discharged through the outlet of the impeller 24 along the flow path. do.

Thereafter, air exiting the outlet of the impeller 24 is pressurized by the diffuser 26, and the air pressurized by the diffuser 26 is guided to the motor 30 by the guide vanes 28. The blown air is guided to the rotor 34 by the guide venturi 25a.

In this way, the air introduced into the motor 30 is cooled while passing through the rotor 34 and the stator 32 which rotate at high speed, and then is discharged through the discharge port 23a of the motor housing 23.

However, the vacuum cleaner motor according to the prior art cools the rotor that is hotter than the stator because the air blown by the impeller flows into the hot rotor side by the guide venturi, but the rotor is rotated at high speed so that the air escapes to the stator side. There is a limit.

The present invention has been made in order to solve the above problems of the prior art, the air blown by the impeller flows to the motor side through the air flowing in the rotor is rotated at high speed to improve the cooling efficiency of the rotor to improve the reliability of the motor The purpose is to provide a motor for a vacuum cleaner.

1 is a perspective view of a typical vacuum cleaner,

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a cross-sectional view showing a centrifugal blower for a vacuum cleaner according to the prior art,

Figure 4 is a perspective view of a part of the vacuum cleaner motor according to the prior art,

5 is a sectional view showing a centrifugal blower for a vacuum cleaner according to the present invention;

6 is a perspective view of a part of the vacuum cleaner motor according to the present invention.

<Explanation of symbols on main parts of the drawings>

54 impeller 60 motor

62: stator 64: rotor

66: brush 68: commutator

70: guide part

According to an aspect of the present invention, there is provided a vacuum cleaner motor comprising: a stator fixed to an inner surface of a motor housing in which a discharge port is formed; A rotor spaced apart from the inside of the stator by a predetermined interval and connected to a rotating shaft for rotating the impeller; The guide part is provided between the stator and the rotor to prevent the air introduced into the rotor from passing through the impeller to escape to the outer peripheral side of the rotor and to flow to the discharge port.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a cross-sectional view showing a centrifugal blower for a vacuum cleaner according to the present invention, Figure 6 is a perspective view showing a part of the motor for a vacuum cleaner according to the present invention.

The centrifugal blower for a vacuum cleaner according to the present invention is installed in the impeller cover 52, the inlet port 52a is formed in the upper center, as shown in Figure 5, the inside of the impeller cover 52 from the inlet port 52a An impeller 54 for sucking air, a motor housing 53 connected to a lower end of the impeller cover 52, and having a plurality of discharge ports 53a formed on a side thereof, and installed inside the motor housing 53, wherein the impeller ( A motor 60 including a stator 62 and a rotor 64 to rotate 54, and is installed between the stator 62 and the rotor 64 and blown to the rotor 64 side by the impeller 54. It comprises a guide portion 70 for guiding the air passing through the rotor 64 without escaping the air to the stator 62 side.

In addition, between the impeller 54 and the motor 60, a disk body 57 having a diffuser 56 and a guide vane 58 formed at a circumferential portion thereof is installed at upper and lower sides, respectively.

In particular, the motor includes a stator core 62a fixed to an inner wall of the motor housing 53 and a stator coil 62b wound around the stator core 62a. And a rotor core 64a installed on the rotary shaft 59 connected to the impeller 54 at a predetermined interval inside the stator 62, and a rotor coil 64b wound around the rotor core 64a. A brush 66 and a commutator 68 installed at a lower side of the rotor 64, that is, at a lower end of the rotation shaft 59 to supply external power to the stator coil 62b and the rotor coil 64b. It consists of

Here, the rotor core 64a has a hole (h) through which the rotating shaft 59 can be fitted at the center thereof, and a plurality of protrusions are formed at the outer circumference thereof so that the rotor coil 64b can be wound thereon. The rotor core 64a wound around the coil 64b is provided so that a plurality of rotor cores 64a are stacked.

In addition, the stator core 62a provided outside the rotor 64 is formed to face a protrusion protruding toward the rotor 64 so that the stator coil 62b is wound around the protrusion 64.

The stator coil 62b is connected to the brush 66 and the rotor coil 64b is connected to the commutator 68.

Therefore, the current is input to the stator coil 62b side through the brush 66 through an external power source, and an electromagnetic force is generated in the stator 62. At the same time, the power is supplied to the rotor coil through the brush 66 and the commutator 68. Since the magnetic field of the N pole and the S pole is formed in the rotor 64 in various ways, the rotor 64 generates mutual torque with the stator 62 and generates torque, thereby causing the rotor ( 64) and the rotating shaft 59 is rotated.

In addition, a motor housing having a guide venturi 55a formed at an upper end of the motor housing 53 to guide the air sucked along the impeller 54, the diffuser 56, and the guide vane 58 to the high-temperature rotor 64. The cover 55 is installed.

In addition, in order to prevent the air flowing into the rotor 64 from passing through the motor housing 53 from flowing out of the rotor 64 which rotates at a high speed, a guide part 70 for guiding air toward the rotor 64 is provided. It is installed between the stator 62 and the rotor 64.

In more detail, the guide part 70 is installed to face a portion where the protruding portion of the stator core 62a is not formed, and the center part is formed to be convex toward the rotor 64, so that both ends thereof are the stator 62. It is fixed to the inside to allow the air introduced into the rotor 64 to pass through the rotor 64 without escaping.

The guide unit 70 is made of an insulating member.

Looking at the operation of the present invention configured as described above are as follows.

First, when a current is supplied to the motor 60 through the brush 66 and the commutator 68 by an external power source, a mutual electromagnetic force is generated between the stator 62 and the rotor 64 to generate torque, thereby The rotor 64 installed on the rotation shaft 59 rotates.

Therefore, as the impeller 64 installed on the upper end of the rotating shaft 59 is rotated, air is sucked into the inlet of the impeller 54 through the suction port 52a, and is discharged through the outlet of the impeller 54 along the flow path. do.

Thereafter, air exiting the outlet of the impeller 64 is pressurized by the diffuser 56, and the air pressurized by the diffuser 56 is guided to the motor 60 by the guide vane 58. The blown air is guided to the rotor 64 side by the guide venturi 55a.

In this way, the air introduced into the rotor 64 passes through the rotor 64 and the stator 62, cools the rotor 64 and the stator 62, and then discharges the outlet 53a of the motor housing 53. Discharged through.

Here, the air introduced to the rotor 64 side is driven to the outer circumferential side of the rotor 64 by the rotor 64 which is rotated at high speed, but the air is heated by the protrusions and guides 70 of the stator 62. The rotor 64 is concentratedly cooled while passing through the rotor 64.

The vacuum cleaner motor according to the present invention configured as described above is blown by the impeller because the guide part for guiding the air to the rotor side is installed between the stator and the rotor so that the air introduced to the rotor side is blown by the impeller so as not to escape to the stator side. The air introduced into the motor side is guided to the discharge port through the rotor by the guide unit, thereby improving the reliability of the motor.

Claims (3)

A stator fixed to the inner side of the motor housing in which the discharge port is formed; A rotor spaced apart from the inside of the stator by a predetermined interval and connected to a rotating shaft for rotating the impeller; And a guide portion provided between the stator and the rotor to prevent the air introduced into the rotor from passing through the impeller to escape to the outer peripheral side of the rotor and to flow to the discharge port. The method of claim 1, The guide unit has a central portion is formed convexly toward the rotor side, both ends of the vacuum cleaner motor, characterized in that fixed to the inside of the stator. The method of claim 2, The guide unit is a vacuum cleaner motor, characterized in that made of an insulating member.