KR20020063427A - Suction fan and vacuum cleaner having thereof - Google Patents

Abstract

PURPOSE: A suction fan and a vacuum cleaner having the same are provided to increase a suction force by reducing a flowing resistance of a fluid and to restraint deterioration owing to a temperature rising by promoting a cooling of an electronic motor. CONSTITUTION: A vacuum cleaner comprises a casing(10), a suction fan(20) for generating a suction force, a dust envelope(50), an extension pipe(54) coupled to the casing, and a suction head(52) for absorbing a fluid and a foreign material. A space is formed at an inside of the case, and a discharge outlet is formed at a backward end portion thereof. A suction port(42) and a discharge port(44) are formed along a rotating axis to opposite each other. The suction fan is contained at the inside of the casing, so that the discharge port is placed on an extension line of the discharge port along a flowing direction of the fluid. The dust envelope is placed at an upper side of the suction fan with regard to the flowing direction of the fluid and collects a dust and a foreign material. The suction fan is composed of an impeller(21), an electronic motor(31) and a housing(41) for containing and supporting rotatably the impeller and the motor.

Description

Suction fan and vacuum cleaner with same {SUCTION FAN AND VACUUM CLEANER HAVING THEREOF}

The present invention relates to a suction fan and a vacuum cleaner having the same, and more particularly, to increase the suction power by reducing the flow resistance of the fluid and to promote the cooling of the electric motor portion to suppress the forced deterioration due to the temperature rise. It relates to a suction fan and a vacuum cleaner having the same.

1 is a cross-sectional plan view of a conventional vacuum cleaner. As shown, the vacuum cleaner, the casing 110 to form a receiving space therein, the suction fan 120 accommodated in the casing 110 to generate a suction force, and the suction fan with respect to the flow direction of the fluid A dust bag 150 disposed on an upstream side of the 120 to collect dust and foreign matter in the fluid; a suction head 152 formed to suck dust and foreign matter from the outside; and a suction head 152. And casing 110 is configured to include an extension pipe 154 to be connected to each other.

One side of the casing 110, the coupling portion 111 is formed so that the extension pipe 154 can be coupled, the dust bag accommodation portion 112a to accommodate the dust bag 150 on one side of the coupling portion 111 ) Is formed.

A cord receptacle 115 in which a fan accommodating part 112b in which the suction fan 120 is accommodated and a power cord 117 for supplying power to the suction fan 120 are wound in the rear region of the dust bag accommodating part 112a. Cord receptacle 112c is formed to accommodate each of the two.

On the other hand, the suction fan 120 is coupled to the impeller 121 for generating a suction force along the axial direction, and rotatably integrally to the rotary shaft 123 of the impeller 121 is an electric motor for rotating the impeller 121 And a housing 141 for rotatably receiving and supporting the impeller 121 and the electric motor unit 131.

A suction port 142 is formed in the front region of the impeller 121 along the axial direction of the impeller 121, and the fluid sucked through the suction port 142 at the side edge of the electric motor unit 131. Exhaust port 144 is formed to be discharged.

By this configuration, when power is applied to the electric motor unit 131, the rotor 134 of the electric motor unit 131 rotates, and the impeller 121 is rotatably coupled to the rotor 134 integrally. Rotates to generate suction force inside. Accordingly, external fluid and foreign matter are sucked from the suction head 152, and the fluid and foreign matter sucked through the suction head 152 are sucked into the dust bag 150 along the extension pipe 154.

The foreign matter sucked into the dust bag 150 is blocked by the dust bag 150 and collected in the dust bag 150, and the fluid passing through the dust bag 150 passes through the housing 142 through the suction port 142. 141 is sucked into the interior. The fluid passing through the impeller 121 is heat-exchanged while passing through the electric motor unit 131, and through the plurality of exhaust ports 144 formed at the side edges of the electric motor unit 131 region of the housing 141, It is discharged to the outside. The fluid discharged to the outside of the housing 141 is discharged to the outside of the casing 110 through the discharge portion 116 formed in the rear region of the casing 110.

However, in the conventional vacuum cleaner, the suction port 142 of the housing 141 of the suction fan 120 is formed along the axial direction of the impeller 121 and the exhaust port 144 is in the axial direction of the impeller 121. It is formed on the side edge of the housing 141 horizontally with respect to, the fluid sucked into the interior of the housing 141 through the suction port 142 and flows to the electric motor unit 131 along the axial direction is pivoted in a substantially right direction It is to be discharged through the exhaust port 144 has a problem that the flow resistance of the fluid is increased.

In addition, the fluid discharged through the exhaust port 144 is rotated again to be discharged to the outside of the casing 110 through the discharge port 116 formed in the rear end region of the casing 110 to increase the flow resistance have.

When the flow resistance is increased due to the mismatch between the direction of the suction port 120 and the exhaust port 144 of the suction fan 120 and the discharge port 116 of the casing 110, the suction force is relatively reduced, The reduction not only impairs the cleaning performance but also causes the temperature rise of the electric motor unit 131, thereby causing a problem of forced deterioration.

Accordingly, an object of the present invention is to provide a suction fan and a vacuum cleaner having the same, which can improve the suction power by reducing the flow resistance of the fluid and prevent the forced deterioration by preventing the temperature rise of the electric motor part.

1 is a cross-sectional plan view of a conventional vacuum cleaner,

2 is a cross-sectional plan view of the vacuum cleaner according to an embodiment of the present invention,

3 is a perspective view of the suction fan of FIG.

4 is a side view of the suction fan of FIG. 3.

Explanation of symbols on the main parts of the drawings

10: casing 12b: fan housing

16: outlet 20: suction fan

21 impeller 31 electric motor part

36: rotating shaft 41: housing

42: inlet port 44: exhaust port

50: dust bag

According to the present invention, the casing is formed in the receiving space therein and the inlet is formed on one side so that the fluid can be introduced from the outside; An impeller generating suction force, an electric motor unit integrally coupled to the rotating shaft of the impeller, and forming an accommodation space for the impeller and the electric motor unit, and forming an accommodating space along the rotation axis direction of the impeller A suction fan having a housing formed therein and having an exhaust port formed at an opposite end thereof through the suction port and configured to discharge the fluid via the electric motor unit. Is achieved.

Here, it is preferable that the discharge port is formed in the casing so as to discharge the fluid discharged through the exhaust port to the outside of the casing on an extension line of the exhaust port along the rotation axis direction of the impeller.

On the other hand, according to another field of the present invention, an impeller for generating a suction force along the axial direction; An electric motor unit integrally coupled to the rotating shaft of the impeller to rotate the impeller; A suction port is formed at the impeller side end to form a receiving space for the impeller and the electric motor unit, and the fluid is sucked at the end of the impeller along the rotation axis direction of the impeller. A suction fan is provided, which comprises a housing in which an exhaust port is formed so that the fluid passing through can be discharged.

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

2 is a cross-sectional plan view of a vacuum cleaner according to an embodiment of the present invention, FIG. 3 is a perspective view of the suction fan of FIG. 2, and FIG. 4 is a side view of the suction fan of FIG. 3. As shown in these figures, the vacuum cleaner includes a casing 10 having a receiving space therein and having a discharge port formed at a rear end region thereof, a suction port 42 and an exhaust port formed to face each other along the rotation axis direction. A suction fan 20 having a 44 to be disposed in the casing 10 to generate a suction force so that the discharge port 16 is disposed on an extension line of the exhaust port 44 along the flow direction of the fluid, and a flow direction of the fluid; A dust bag 50 disposed on an upstream side of the suction fan 20 to collect dust and foreign matter in the fluid, an extension tube 54 extending to one side of the casing 10, and an extension tube 54. It is configured to include a suction head 52 is connected in communication with one end of the intake fluid and foreign matter from the outside.

The coupling part 11 is formed at one side of the casing 10 so that the extension pipe 54 may be coupled thereto, and the dust bag accommodation part 12a may accommodate the dust bag 50 at one side of the coupling part 11. ) Is formed. A fan accommodating part 12b is formed at the downstream side of the dust bag accommodating part 12a to accommodate the suction fan 20 along the flow direction of the fluid, and a power cord 17 is provided at one side of the fan accommodating part 12b. Cord receptacle 12c is formed so as to accommodate cord reel 15 wound thereon. On the upstream side of the fan accommodation portion 12b, a through hole 13 is formed so as to communicate with the dust bag accommodation portion 12a.

On the other hand, the suction fan 20, the impeller 21 for generating a suction force along the axial direction, and the electric motor unit 31 is rotatably coupled to one side of the impeller 21 to rotate and drive the impeller 21 ), And a housing 41 which accommodates the impeller 21 and the electric motor part 31 and rotatably supports therein.

The electric motor part 31 may include a stator 32 fixedly disposed inside the housing 41, a rotor 34 rotatably received inside the stator 32, and one end region of the motor 31. The rotary shaft 36 is rotatably coupled to the shaft center of the shaft 34 and the other end is rotatably coupled to the shaft core of the impeller 21. The stator 32 includes a core 35 formed by insulating and stacking a plurality of magnetic steel sheets having a rectangular cross-sectional shape, and a coil (not shown) wound around the core 35 to form a circular cross-sectional shape of the housing 41. It is fixedly housed inside.

At the end of the impeller 21 side of the housing 41 along the axial direction, a suction port 42 is formed so as to communicate with the through hole 13 to suck the fluid from the dust bag receiving portion 12a, and the electric motor At the end portion 31 side, a plurality of exhaust ports 44 are formed to be spaced apart from each other along the circumferential direction. Here, each exhaust port 44 is in communication with each area between the inner edge of the housing 41 and each side of the core 35 of the stator 32 is formed so that the flow resistance of the fluid is small It is penetrated.

On the other hand, a plurality of discharge ports 16 are formed at the rear end of the fan accommodation portion 12b to discharge the fluid discharged through the exhaust port 44 of the suction fan 20 to the outside of the casing 10. Here, some of the outlets 16 are formed to correspond to each other on the extension line of each of the outlets 44 along the flow direction of the fluid so that the flow resistance of the fluid can be reduced.

By this configuration, when power is applied to the electric motor unit 31, the rotor 34 rotates integrally with the rotary shaft 36, and the impeller 21 rotates integrally with the rotary shaft 36 while the housing 41 Inhalation of the fluid through the inlet 42 of the inside. Accordingly, the fluid and the foreign matter is sucked from the outside through the suction head 52, the sucked fluid and the foreign matter is introduced into the dust bag 50 through the extension pipe (54). Dust and foreign matter are collected in the dust bag 50, the fluid is sucked into the inlet 42 of the housing 41 through the dust bag (50).

The sucked fluid flows through the air gap between the housing 41 and the core 35 and between the rotor 34 and the stator 32 along the axial direction to cool the stator 32 and the rotor 34. It is discharged to the outside of the housing 41 through the exhaust port 44 formed in the rear end region of the housing 41. The fluid discharged to the outside of the housing 41 flows along the axial direction and is discharged to the outside of the casing 10 through the discharge port 16 formed in the rear end region of the casing 10.

As described above, according to the present invention, the suction port is formed at one end of the housing along the axial direction and the exhaust port is formed at the opposite end to reduce the flow resistance of the fluid, thereby increasing the suction force as well as the electric motor. A suction fan is provided that can promote negative cooling to suppress forced deterioration of the electric motor portion due to temperature rise.

Further, according to the present invention, the suction fan is formed at one end of the housing along the axial direction so that the flow resistance of the fluid is small, and the exhaust fan is formed at the opposite end, respectively, and each along the flow direction of the fluid By providing a casing with a discharge port formed on the extension line of the exhaust port to minimize the flow resistance of the fluid, the suction power is increased to improve the cleaning performance, and to promote the cooling of the electric motor part to suppress the forced deterioration due to the temperature rise. Vacuum cleaners are provided.

Claims (3)

A casing which forms an accommodation space therein and has an inlet formed at one side thereof to allow fluid to flow from the outside; An impeller generating suction force, an electric motor unit integrally coupled to the rotating shaft of the impeller, and forming an accommodation space for the impeller and the electric motor unit, and forming an accommodating space along the rotation axis direction of the impeller And a suction fan having a housing formed at a suction port, and having a housing formed at an opposite end thereof, the housing having a suction port formed therein so as to allow the fluid to be discharged through the electric motor part. The method of claim 1, The casing has a discharge port formed on the extension line of the exhaust port along the rotation axis direction of the impeller so as to discharge the fluid discharged through the exhaust port to the outside of the casing. An impeller generating suction force along the axial direction; An electric motor unit integrally coupled to the rotating shaft of the impeller to rotate the impeller; A suction port is formed at the impeller side end to form a receiving space for the impeller and the electric motor unit, and the fluid is sucked at the end of the impeller along the rotation axis direction of the impeller. And a housing in which an exhaust port is formed so that the fluid passing through can be discharged.