Blower for vacuum cleaner

Abstract

A blower for a vacuum cleaner, according to the present invention, comprises: an impeller cover (100) having an air suction hole formed in the center thereof; an impeller (200) disposed in an internal accommodation space portion (120) of the impeller cover (100); a rotor (420) mounted on a rotary shaft (430) coupled to the impeller (200); a motor (400) including a stator (410) arranged at the outer circumference of the rotor (420); a housing front (500) supporting a diffuser assembly (300) in an assembled state and having a hollow portion (520) surrounding the motor (400); and a diffuser assembly (300) assembled by the housing front (500) and including a first diffuser (310) and a second diffuser (320) which are disposed below the inner and outer circumferences of the impeller cover (100) and are combined in a two-stage structure, wherein the diffuser assembly (300) has a plurality of first guide blades (312) arranged on the outer circumference of the first diffuser (310) to be spaced apart from each other in a circumferential direction and formed to be inclined in an axial direction, and a plurality of second guide blades (322) arranged on the outer circumference of the second diffuser (320) to face the first guide blades (312), thereby continuously guiding and diffusing air sucked according to rotation of the impeller (200) along the first guide blades (312) and the second guide blades (322) for discharge.

Description

Blower for vacuum cleaner

[0001] The present invention relates to a blower for a vacuum cleaner, and more particularly, to a blower for a vacuum cleaner that includes a diffuser assembly having a two-stage combined structure to increase air suction power and thereby increase air pressure generated by a motor, thereby achieving high output performance.

[0002] In general, a blower generates air pressure through an impeller that rotates according to the driving of a motor, and such a blower can be applied to various mechanical devices that require air pressure, including vacuum cleaners.

[0003] To enhance suction power, a vacuum cleaner blower typically includes a motor, impeller, and diffuser. The impeller is connected to the motor and rotates, while the diffuser, a structure surrounding the impeller, guides the high-pressure airflow generated by the motor's rotation to efficiently exhaust it to the outside.

[0004] Since the structure of the diffuser directly affects the velocity distribution and flow characteristics of the airflow, there is a continuous technological demand for a high-efficiency diffuser that can effectively increase fan flow rate and reduce power consumption.

[0005] Meanwhile, according to the prior art patent registration No. 10-0633431, “Impeller for vacuum cleaner and motor assembly having the same,” the technology has a structure including an inner case and an outer case, and is configured to include a motor, an impeller rotated by the motor, and a diffuser that guides air sucked by the impeller toward the motor.

[0006] The above diffuser is located outside the impeller and is installed on top of the motor so as to form a concentric circle with the impeller while maintaining a certain gap to allow the impeller to rotate. The diffuser is formed with a number of guide members to efficiently guide the air sucked through the impeller toward the motor.

[0007] In a motor assembly for a vacuum cleaner configured as described above, when the impeller rotates in accordance with the rotation of the motor, air containing dust and dirt is sucked in through the dirt intake port of the suction brush, and after passing through the dust collection chamber, foreign substances are removed, and only relatively clean air is introduced into the impeller. The air introduced into the impeller moves toward the diffuser along a plurality of compartments formed inside the impeller and is discharged, and the air discharged through the diffuser cools the motor and is then discharged to the outside of the vacuum cleaner through the exhaust port.

[0008] However, since this motor assembly has a single-structure diffuser for guiding the air flow, the air sucked in through the impeller is simply guided along the surface of the inclined blades by a plurality of blades (vanes) integrally arranged around the diffuser and discharged to the outside, so the flow rate cannot be effectively increased, and the air pressure decreases, making it difficult to maintain the required high-output performance.

[0009] Accordingly, in order to solve the above-described problems, the present invention proposes a new vacuum cleaner blower using a two-stage diffuser assembly.

[0010] The purpose of the present invention is to provide a blower for a vacuum cleaner that effectively increases suction power by improving the structure of a diffuser that guides airflow to be quickly discharged outside the motor, thereby improving overall performance.

[0011] The above-mentioned object and other inherent objects of the present invention can all be easily achieved by the present invention described below.

[0012] A blower for a vacuum cleaner according to the present invention

[0013] Impeller cover (100) with an air intake hole formed in the center;

[0014] An impeller (200) placed in the internal storage space (120) of the above impeller cover (100);

[0015] A rotor (420) mounted on a rotating shaft (430) coupled to the above impeller (200);

[0016] A motor (400) including a stator (410) arranged on the outer periphery of the rotor (420);

[0017] A housing front (500) that supports the diffuser assembly (300) in an assembled state and has a hollow portion (520) that surrounds the motor (400);

[0018] A diffuser assembly (300) including a first diffuser (310) and a second diffuser (320) assembled by the housing front (500) and arranged on the lower side of the inner and outer periphery of the impeller cover (100) and combined into a two-stage structure;

[0019] , and the diffuser assembly (300) comprises:

[0020] A plurality of first induction blades (312) are arranged spaced apart from each other in the circumferential direction around the outer periphery of the first diffuser (310) and are formed to be inclined along the axial direction.

[0021] A plurality of second induction blades (322) are arranged on the outer periphery of the second diffuser (320) to face the first induction blades (312).

[0022] It is characterized in that the air sucked in by the rotation of the impeller (200) is continuously guided and dispersed along the first guide blade (312) and the second guide blade (322) and discharged, thereby increasing the air pressure generated by the motor (400), thereby amplifying the air suction force.

[0023] In the present invention, the first diffuser (310) includes a first annular body (311) having a curved portion (311A) formed on the upper circumference for guiding air,

[0024] It is preferable to have an outer annular guide part (313) formed integrally with a plurality of first guide blades (312) formed axially inclined on the outer circumference of the first annular body (311).

[0025] In the present invention, an annular mounting end (313A) is formed on the outer circumference of the outer annular guide portion (313) on which the lower circumference surface of the impeller cover (100) is mounted.

[0026] The upper circumferential surface of the above outer annular guide (313) is configured to interface with the lower inner end of the impeller cover (100), so that the impeller cover (100) and the first diffuser (310) may be elastically coupled.

[0027] In the present invention, a plurality of fastening pieces (314) having first coupling holes (314A) formed therein are formed protrudingly on the inner side of the first annular body (311) of the first diffuser (310), and a coupling end (315) is formed on the lower periphery of the first annular body (311).

[0028] The lower peripheral surface of the above-mentioned connecting end (315) is configured to be in contact with the upper peripheral surface of the housing front (500),

[0029] The second coupling hole (510) formed in the housing front (500) may be aligned with the first coupling hole (314A) so that they may be assembled and coupled by the first coupling bolt (B1).

[0030] In the present invention, the second diffuser (320) includes a second annular body (321) having an annular fitting groove (321A) formed on the upper circumference,

[0031] The outer circumference of the second annular body (321) is provided with an outer annular joint (323) formed integrally by forming a plurality of second guide blades (322) inclined in the axial direction.

[0032] The above second diffuser (320) may be guided along the first guide blade (312) of the first diffuser (310) so that the induced airflow is dispersed and discharged to the outside through the second guide blade (322).

[0033] In the present invention, an annular mounting protrusion (323A) is formed on the upper inner lower circumference of the outer annular joint (323) of the second diffuser (320),

[0034] It is configured so that the lower circumferential surface of the outer annular guide portion (313) of the first diffuser (310) is seated on the annular mounting jaw (323A).

[0035] It is preferable that the inner circumferential surface of the cover (323B) of the outer annular joint (323) be fitted to elastically wrap around the outer circumferential surface of the outer annular guide (313), so that the connection between the two diffusers is firmly maintained.

[0036] In the present invention, a downwardly protruding annular fitting protrusion ring (311B) is formed on the lower periphery of the first annular body (311) of the first diffuser (310),

[0037] It is preferable that the above-mentioned annular fitting protrusion ring (311B) be configured to be fitted and combined into the annular fitting groove (321A) of the second diffuser (320).

[0038] According to the present invention, air sucked in by the rotation of the impeller is continuously guided along the airflow discharge guide vanes of the first and second diffusers formed in the diffuser assembly of the two-stage combined structure, thereby effectively increasing the air pressure generated by the motor, thereby improving the suction power, and thus having the effect of realizing high output performance of the blower for a vacuum cleaner.

[0039] In addition, the present invention enables miniaturization and compactness of the overall structure by assembling the first diffuser and the second diffuser constituting the diffuser assembly via the housing front, and maintains a firmly coupled state despite being easy to assemble and having a simple structure, thereby providing the effect of stably positioning the diffuser assembly without shaking and improving the airflow guidance efficiency.

[0040] In addition, the present invention has the effect of promoting the performance of the motor by continuously forming a vortex and inducing the airflow by the two-stage blades of the first diffuser and the second diffuser having different numbers and shapes, thereby promoting the flow of the exhaust air and thereby promoting the flow of the cooling air formed along the outer periphery of the motor, thereby improving the cooling efficiency of the motor.

[0041] In addition, according to the present invention, by forming a hollow portion inside the front of the housing, it is possible to configure it to function as an assembly member of the diffuser assembly and also as a motor housing, so that not only can the first diffuser and the second diffuser be manufactured with a simple structure, but also the penetration of foreign substances into the motor side can be effectively prevented, thereby preventing deterioration of motor performance.

[0042] In addition, the present invention can reduce noise by absorbing vibrations generated when the impeller rotates and the fan motor is driven, thereby having the effect of improving the overall quality of the blower.

[0043] Fig. 1 is a perspective view showing the overall assembly state of a blower for a vacuum cleaner according to the present invention.

[0044] Figure 2 is a perspective view showing a separated state of a blower for a vacuum cleaner according to the present invention.

[0045] Figure 3 is a longitudinal cross-sectional view of a blower for a vacuum cleaner according to the present invention.

[0046] Fig. 4 is a front view showing the assembled state of the diffuser assembly of the blower for a vacuum cleaner according to the present invention.

[0047] FIG. 5 is a cross-sectional view showing a separated state of the first diffuser and the second diffuser constituting the diffuser assembly of the blower for a vacuum cleaner according to the present invention.

[0048] Fig. 6 is a mid-section perspective view showing the assembled state of the diffuser assembly of the blower for a vacuum cleaner according to the present invention.

[0049] Fig. 7 is a mid-section perspective view showing a disassembled state of a diffuser assembly of a blower for a vacuum cleaner according to the present invention.

[0050] Fig. 8 is a cross-sectional view showing another embodiment of a diffuser assembly of a blower for a vacuum cleaner according to the present invention, showing a combined state.

[0051] The present invention will be described in detail below with reference to the attached drawings.

[0052] The present invention provides a blower for a vacuum cleaner for doubling air suction power, and Fig. 1 is a perspective view showing the entire assembled state of the blower for a vacuum cleaner according to the present invention, Fig. 2 is a perspective view showing the disassembled state of the blower for a vacuum cleaner according to the present invention, and Fig. 3 is a longitudinal sectional view of the blower for a vacuum cleaner according to the present invention.

[0053] Referring to FIGS. 1 to 3, a blower (1000) for a vacuum cleaner according to one embodiment of the present invention is configured to include an impeller cover (100), an impeller (200), a diffuser assembly (300), and a motor (400).

[0054] The impeller cover (100) has an air intake hole (110) formed in the center and a storage space (120) provided inside to accommodate the impeller (200). The impeller (200) is rotated by a motor (400), and air is sucked in by this rotation and discharged to the outside through the diffuser assembly (300).

[0055] The diffuser assembly (300) is configured by combining a first diffuser (310) and a second diffuser (320) in a two-stage structure. The first diffuser (310) includes a first annular body (311) having an air guiding guide curved portion (311A) formed on the upper periphery, and an outer annular guide portion (313) integrally formed by a plurality of first guide blades (312) is provided on the outer periphery of the first annular body (311). The first guide blades (312) are formed to be inclined with respect to the axial direction, and smoothly and quickly guide the air sucked through the impeller (200) along the curved portion (311A), and then guide the air to be dispersed and discharged in the direction of the second diffuser (320).

[0056] The first induction blade (312) is a component for inducing airflow that primarily discharges airflow, and is arranged spaced apart from each other along the circumferential direction. Each induction blade (312) is formed to be inclined with respect to the axial direction, thereby performing the function of efficiently dispersing and discharging airflow.

[0057] In addition, an annular mounting end (313A) is formed on the outer circumference of the outer annular guide (313) to which the lower circumference surface of the impeller cover (100) is mounted, and the upper circumference surface of the outer annular guide (313) is configured to be in contact with the lower inner end of the impeller cover (100), so that the impeller cover (100) and the first diffuser (310) can be elastically coupled.

[0058] A plurality of fastening pieces (314) having first coupling holes (314A) formed therein protrude from the inner side of the first annular body (311). In addition, the lower peripheral surface of the coupling end portion (315) formed on the lower periphery of the first annular body (311) is configured to interface with the upper peripheral surface of the housing front (500), and the second coupling hole (510) formed through the housing front (500) and the first coupling hole (314A) are matched with each other, thereby assembling the first coupling bolt (B1).

[0059] A downwardly protruding annular fitting protrusion ring (311B) is provided on the lower periphery of the first annular body (311) of the first diffuser (310), and the annular fitting protrusion ring (311B) is fitted into and combined with the annular fitting groove (321A) of the second diffuser (320). At this time, an adhesive (G) is applied to the lower portion and periphery of the annular fitting protrusion ring (311B) and the inner wall of the annular fitting groove (321A) to perform bonding processing, thereby maintaining a firm bonding state between the two diffusers.

[0060] The second diffuser (320) has an outer annular joint (323) formed by integrally forming a plurality of second guide blades (322) on the outer periphery of a second annular body (321) having an annular fitting groove (321A) formed on the upper periphery. The second guide blades (322) are formed to be inclined with respect to the axial direction, and are guided along the first guide blades (312) of the first diffuser (310) to disperse and discharge the induced airflow to the outside.

[0061] An annular mounting protrusion (323A) is formed on the upper inner lower circumference of the outer annular joint (323) of the second diffuser (320), and the lower circumference surface of the outer annular guide portion (313) of the first diffuser (310) is configured to be mounted on this annular mounting protrusion (323A). Through this, the inner circumference surface of the cover (323B) formed on the outer annular joint (323) is elastically fitted around the outer circumference surface of the outer annular guide portion (313), so that the coupling state between the two diffusers can be stably maintained.

[0062] The above plurality of second induction blades (322) are airflow induction components that secondarily discharge airflow, are arranged spaced apart from each other along the circumferential direction, and each blade is formed to be inclined with respect to the axial direction.

[0063] The first guide blade (312) of the first diffuser (310) and the second guide blade (322) of the second diffuser (320) are sequentially arranged opposite each other in an upper and lower two-stage structure with different numbers, inclination angles, or curved shapes, thereby forming a two-stage airflow induction means with amplified suction and discharge forces. The number and shape of these guide blades (312, 322) can be changed and applied in various embodiments.

[0064] For example, as illustrated in FIG. 4, a plurality of first guide blades (312) and second guide blades (322) formed in the first diffuser (310) and the second diffuser (320) are formed in an inclined shape or a curved shape, respectively, and are arranged oppositely and spaced apart from each other. The airflow passing between the first guide blades (312) is continuously guided between the second guide blades (322) to be quickly dispersed and discharged, thereby effectively increasing the air pressure generated by the motor (400), and as a result, a high-power performance blower for a vacuum cleaner with increased air suction power can be implemented. In addition, since the motor (400) is effectively cooled by the cooling air included in the airflow passing between the first guide blades (312) and the second guide blades (322), the performance of the motor can also be improved.

[0065] A downwardly protruding annular fitting protrusion ring (311B) is provided on the lower circumference of the first annular body (311) of the first diffuser (310), and this is fitted into and combined with the annular fitting groove (321A) of the second diffuser (320). At the same time, the first diffuser (310) and the housing front (500) are fastened through the first coupling bolt (B1), so that the diffuser assembly (300) maintains a double, solid coupling state as a two-stage structure. In addition, the inner circumference surface of the second annular body (321) of the second diffuser (320) is elastically press-fitted into the outer circumference surface of the housing front (500), so that the coupling strength of the entire structure is further improved.

[0066] The housing front (500) is an assembly member for assembling the first diffuser (310) and the second diffuser (320), and also functions as a motor housing that surrounds the motor (400) from the outside. A hollow portion (520) capable of accommodating the outer circumference of the motor (400) is formed inside the housing front (500), thereby covering the motor (400), thereby preventing foreign substances contained in the intake air from penetrating toward the motor (400). This prevents deterioration of motor performance, and by connecting the housing front (500) and the first diffuser (310) through the first connecting bolt (B1), the first diffuser (310) and the second diffuser (320) can be manufactured with a simple structure, thereby achieving simplification of the component configuration and cost reduction.

[0067] A rotation shaft insertion hole (530) is formed in the upper center of the housing front (500), and an upper bearing receiving portion (540) is provided on the lower periphery thereof. In addition, an outwardly protruding fastening bracket (550) is formed on the lower periphery of the housing front (500), and a third coupling hole (550A) formed in the fastening bracket (550) and a fourth coupling hole (610A) formed in the leg (610) of the fixed support bracket (600) arranged below the motor (400) correspond to each other and are fastened through a second coupling bolt (B2). A lower bearing receiving portion (620) is formed in the center of the fixed support bracket (600), thereby completing the rotation shaft support structure.

[0068] The motor (400) is configured to include a stator (410), a rotor (420) rotatable with respect to the stator (410), and a rotation shaft (430) inserted into the center of the rotor (420). The rotor (420) is provided with a permanent magnet, and an upper bearing (440) and a lower bearing (450) are respectively fitted at the upper and lower ends of the rotation shaft (430) inserted into the rotor (420). These bearings (440, 450) are respectively mounted in an upper bearing receiving portion (540) formed in a housing front (500) and a lower bearing receiving portion (620) formed in a fixed support bracket (600), thereby enabling stable support and rotation maintenance of the rotation shaft (430).

[0069] The fixed support member (460) is formed to protrude downward from the lower outer side of the stator core constituting the stator (410) of the motor, and is assembled by fitting into a fitting hole (710) formed in a printed circuit board (700).

[0070] FIG. 8 is a cross-sectional view showing another embodiment of a diffuser assembly (300) of a blower (1000) for a vacuum cleaner according to the present invention in a coupled state.

[0071] As shown in Fig. 8, a downwardly protruding annular fitting protrusion ring (311B) is provided on the lower periphery of the first annular body (311) of the first diffuser (310), and a plurality of annular protrusion pieces (311B') are formed on the outer periphery of the ring (311B).

[0072] The above-mentioned annular protrusion (311B') is formed to have a protruding structure, and correspondingly, an annular protruding groove (321A') formed to match the shape of the protruding groove is provided around the circumference of the annular fitting groove (321A) of the second diffuser (320).

[0073] This uneven structure allows the protruding piece (311B') to be precisely fitted into the uneven groove (321A') when combined, thereby stably maintaining a firm combined state of the diffuser assembly (300) even without using a separate adhesive (G).

[0074] Additionally, the relative positions between diffusers are precisely fixed by mechanical fastening, thereby improving the precision and repeatability of the assembly process.

[0075] Meanwhile, an upper annular vibration prevention packing (P1) is fitted into the first groove (311') formed on the inner circumferential surface of the first annular body (311) of the first diffuser (310) and the upper groove (500A) formed on the upper outer circumferential surface of the housing front (500).

[0076] In addition, a lower annular vibration prevention packing (P2) is fitted into the second groove (321') formed on the inner circumferential surface of the second annular body (321) of the second diffuser (320) and the lower groove (500B) formed on the lower outer circumferential surface of the housing front (500).

[0077] In this way, the packings (P1, P2) interposed at the upper and lower parts effectively absorb the vibration generated when the motor (400) is driven, thereby reducing the operating noise of the blower and simultaneously ensuring the durability and quietness of the product.

[0078] It should be noted that the detailed description of the present invention described above is merely provided as an example to facilitate understanding of the present invention and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims, and all simple modifications or variations of the present invention within this scope should be understood to fall within the scope of the present invention.

Claims

1. Impeller cover (100) with an air intake hole formed in the center; An impeller (200) placed in the internal storage space (120) of the above impeller cover (100); A rotor (420) mounted on a rotating shaft (430) coupled to the above impeller (200); A motor (400) including a stator (410) arranged on the outer periphery of the rotor (420); A housing front (500) that supports the diffuser assembly (300) in an assembled state and has a hollow portion (520) that surrounds the motor (400); A diffuser assembly (300) including a first diffuser (310) and a second diffuser (320) assembled by the housing front (500) and arranged on the lower side of the inner and outer periphery of the impeller cover (100) and combined into a two-stage structure; , and the diffuser assembly (300) comprises: A plurality of first induction blades (312) are arranged spaced apart from each other in the circumferential direction around the outer periphery of the first diffuser (310) and are formed to be inclined along the axial direction. A plurality of second induction blades (322) are arranged on the outer periphery of the second diffuser (320) to face the first induction blades (312). A blower for a vacuum cleaner characterized in that the air sucked in according to the rotation of the impeller (200) is continuously guided and dispersed along the first guide blade (312) and the second guide blade (322) and discharged, thereby increasing the air pressure generated by the motor (400), thereby amplifying the air suction force.

2. In the first paragraph, the first diffuser (310) includes a first annular body (311) having a curved portion (311A) formed on the upper circumference for air guidance, A blower for a vacuum cleaner, characterized in that the first annular body (311) has an outer annular guide portion (313) formed integrally by forming a plurality of first guide blades (312) inclined in the axial direction on the outer periphery thereof.

3. In the second paragraph, an annular mounting end (313A) is formed on the outer circumference of the outer annular guide portion (313) on which the lower circumference surface of the impeller cover (100) is mounted. A blower for a vacuum cleaner, characterized in that the upper circumferential surface of the outer annular guide member (313) is configured to interface with the lower inner end of the impeller cover (100), so that the impeller cover (100) and the first diffuser (310) are elastically coupled.

4. In the second paragraph, a plurality of fastening pieces (314) having first coupling holes (314A) formed on the inner side of the first annular body (311) of the first diffuser (310) are formed protrudingly, and a coupling end (315) is formed on the lower circumference of the first annular body (311). The lower peripheral surface of the above-mentioned connecting end (315) is configured to be in contact with the upper peripheral surface of the housing front (500), A blower for a vacuum cleaner, characterized in that the second coupling hole (510) formed in the housing front (500) and the first coupling hole (314A) correspond to each other and are assembled and connected by a first coupling bolt (B1).

5. In the first paragraph, the second diffuser (320) includes a second annular body (321) having an annular fitting groove (321A) formed on the upper circumference, The outer circumference of the second annular body (321) is provided with an outer annular joint (323) formed integrally by forming a plurality of second guide blades (322) inclined in the axial direction. A blower for a vacuum cleaner, characterized in that the second diffuser (320) is guided along the first guide blade (312) of the first diffuser (310) so that the induced airflow is dispersed and discharged to the outside through the second guide blade (322).

6. In the fifth paragraph, an annular mounting protrusion (323A) is formed on the upper inner lower circumference of the outer annular joint (323) of the second diffuser (320). It is configured so that the lower circumferential surface of the outer annular guide portion (313) of the first diffuser (310) is seated on the annular mounting jaw (323A). A blower for a vacuum cleaner, characterized in that the inner circumferential surface of the cover (323B) of the outer annular joint (323) is elastically wrapped around the outer circumferential surface of the outer annular guide (313) and fitted, so that the connection between the two diffusers is firmly maintained.

7. In the first paragraph, a downwardly protruding annular fitting protrusion ring (311B) is formed on the lower periphery of the first annular body (311) of the first diffuser (310), A blower for a vacuum cleaner, characterized in that the above-mentioned annular fitting protrusion ring (311B) is configured to be fitted and combined into the annular fitting groove (321A) of the above-mentioned second diffuser (320).

8. In the first paragraph, the housing front (500) has a hollow portion (520) that accommodates the outer circumference of the motor (400), A blower for a vacuum cleaner, characterized in that it functions as an assembly member for assembling the first diffuser (310) and the second diffuser (320) and also functions as a motor housing that surrounds the motor (400).

9. In the first paragraph, a downwardly protruding annular fitting protrusion ring (311B) is formed on the lower periphery of the first annular body (311) of the first diffuser (310), A circular protrusion (310B') having a rough structure is further formed around the circumference of the above circular fitting protrusion ring (311B). A blower for a vacuum cleaner, characterized in that the above-mentioned annular protrusion (310B') is configured to be fitted into and combined with an annular protruding groove (321A') formed around an annular fitting groove (321A) of the second diffuser (320).

10. In the first paragraph, an upper annular vibration prevention packing (P1) is fitted into the first groove (311') formed on the inner circumferential surface of the first annular body (311) of the first diffuser (310) and the upper groove (500A) formed on the upper outer circumferential surface of the housing front (500). A lower annular vibration prevention packing (P2) is fitted into the second groove (321') formed on the inner circumferential surface of the second annular body (321) of the second diffuser (320) and the lower groove (500B) formed on the lower outer circumferential surface of the housing front (500). A blower for a vacuum cleaner, characterized in that the vibration generated when the motor (400) is driven is absorbed by the above packing (P1, P2).

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