KR100725515B1 - Vacuum cleaner with motor noise reduction structure - Google Patents

Abstract

A vacuum cleaner is disclosed. A motor casing disposed inside the disclosed cleaner body and surrounding the motor; It is provided with a filter member detachably coupled to one side of the motor casing, the exhaust passage of the air discharged from the motor casing is characterized in that for discharging to the inside of the cleaner body through the filter member.

Description

Vacuum cleaner with noise reduction structure for motors {VACUUM CLEANER HAVING NOISE REDUCING STRUCTURE OF MOTOR}

1 is a schematic view showing a noise reduction structure of a conventional vacuum cleaner motor;

2 is a cross-sectional view schematically showing a vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention;

3 is an enlarged cross-sectional view showing a portion in which the filter member shown in FIG. 2 is mounted;

Figure 4 is a side view showing another embodiment of the filter member shown in FIG.

5 is a schematic plan view showing a state in which the sliding door shown in FIG. 2 is drawn out from the cleaner body;

6 is a cross-sectional view schematically showing an intake path of air sucked into a vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention;

Figure 7 is a comparison graph measuring the noise of the vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention and the prior art.

* Description of Signs for Main Parts in Drawings *

20: outer casing 25: mounting portion

26: groove 30: exhaust filter

40: spacer 50: sliding door

S: space part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner having a noise reduction structure capable of reducing noise on the motor exhaust side generated by driving of a motor.

In general, the vacuum cleaner generates exhaust noise inside the housing by the air discharged through the motor. In order to solve this problem, the discharge path of the air discharged through the motor noise reduction structure of the conventional vacuum cleaner is as follows.

As shown in FIG. 1, the window 2a of the motor 2 is introduced into the first exhaust passage 3 through the rear side of the motor 2. Subsequently, after passing through the second exhaust passage 4 formed between the outer circumferential surface of the motor inner casing 6 and the inner circumferential surface of the motor outer casing 1, the inner body of the cleaner body 7 corresponding to the upper side of the outer casing 1 is installed. The exhaust filter 5 is discharged to the outside via the exhaust filter 5.

In this way, the exhaust air is guided in a direction that is bent in multiple stages with respect to the traveling direction of the air while sequentially passing through the first and second exhaust passages (3, 4), varying the path of the noise generated by the motor (2) By lengthening the flow path, the noise discharged to the outside of the cleaner body 7 could be reduced.

However, such a conventional technique is based on the exterior of the motor when the exhaust air passing through the first and second exhaust passages 3 and 4 at high speed is changed in the traveling direction by the first and second exhaust passages 3 and 4. The inner circumferential surface of the casing 1 and a part of the outer circumferential surface of the motor inner casing 6 collide with each other. At this time, a predetermined vibration occurs between the casings 1 and 6, and the vibration causes the first and second exhaust passages. The noise generated in (3, 4), as well as the noise generated by the vibration transmitted to the cleaner body (7) occurred.

As described above, since the unfiltered dust discharged from the motor outer casing 6 cannot be discharged directly to the inside of the cleaner, the cleaner body (from the exhaust port of the motor outer casing 6 so as not to be contaminated with dust or the like). In order to induce unfiltered air to the exhaust filter 5 installed in 7), a long or rather short flow path must be formed as described above. Therefore, the exhaust flow path has to exist and thus, the vibration and the like, It was difficult to solve the noise problem caused by vibration.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a vacuum cleaner having a motor noise reduction structure capable of removing vibrations and noise caused by a separate exhaust passage.

In order to achieve the above object, the present invention is a motor casing disposed inside the cleaner body to surround the motor; And a filter member detachably coupled to one side of the motor casing, and the exhaust flow path of the air discharged from the motor casing is discharged into the cleaner body through the filter member. Provide a cleaner.

Accordingly, by omitting the multi-stage bent exhaust passage formed on one side of the motor casing, it is possible to fundamentally improve the vibration and the noise generated while passing through the exhaust passage.

As the filter member is disposed to have a gap between the bottom surface and the inner circumferential surface of one side of the cleaner body, it is possible to induce a smooth discharge of air passing through the filter member and discharged into the cleaner.

The motor casing may include a mounting part accommodating the filter member on one side, and the mounting part has a plurality of first exhaust holes formed on an upper surface thereof, and a plurality of agents for discharging air passing through the filter member on one peripheral surface thereof. It is preferable to form two exhaust holes.

It may further include at least one spacer interposed between the bottom surface of the filter member and the inner surface of the cleaner body facing the bottom of the filter member to have a predetermined space between the bottom surface of the filter member and the inner surface of the cleaner body, In this case, the spacer may use a dustproof member or a sound absorbing member having a predetermined hardness.

One side of the motor casing facing the bottom of the filter member may further include a sliding door slidingly coupled to the cleaner body to be able to withdraw the filter member from the mounting portion to the outside of the cleaner body.

Hereinafter, the configuration of a vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view schematically showing a vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention, FIG. 3 is an enlarged cross-sectional view showing a portion in which the filter member shown in FIG. 2 is mounted, and FIG. Fig. 5 is a side view showing another embodiment of the filter member, and Fig. 5 shows a schematic plan view showing a state in which the sliding door is drawn out from the cleaner body.

First, as shown in FIG. 2, inside the housing 10 of the vacuum cleaner, an intake part 11 for introducing dust introduced through a suction brush (not shown) and a flexible pipe (not shown) into the dust collecting part 13 is provided. Equipped. The dust collecting unit 13 may adopt a cyclone method in consideration of dust collecting efficiency, and air including dust is introduced into the lower portion of the dust collecting unit 13 through the intake unit 11.

In addition, after separating and collecting the dust from the air introduced into the dust collector 13, the connection flow path for guiding the air filtered by a predetermined filter (not shown) from the dust collector 13 to the motor unit 17 ( 15).

The motor unit 17 is a motor 21 for providing a vacuum pressure, an outer casing surrounding the inner casing 19 and the inner casing 19 surrounding the motor 21 and simultaneously supporting the motor mount 23. And 20.

The inner casing 19 may be formed in two layers to form a plurality of first and second holes 19a and 19b (refer to FIG. 3) to reduce noise in the side and bottom. In this case, the inner casing 19 is not limited to the above shape, and in particular, it is also possible to omit the inner casing 19 and apply only the outer casing 20.

The outer casing 20 has a plurality of first exhaust holes 20a for discharging air discharged from the plurality of second holes 19b of the inner casing 19 to the outside of the outer casing 20. . The plurality of first exhaust holes 20a may be freely arranged at the bottom of the outer casing 20 except for the portion where the motor mounter 23 is located.

In addition, the mounting portion 25 into which the filter member 30 is inserted is extended to one side of the outer casing 20, for example, the bottom of the outer casing 20. In this case, between the filter member 30 and the plurality of first exhaust holes 20a to smoothly discharge the air that passes through the plurality of first exhaust holes 20a toward the filter member 30. A groove 26 having a step 26a of a predetermined height may be formed along the inner circumference of the mounting portion 25 to have a predetermined space. In this case, the height of the step 26a is preferably manufactured in consideration of the exhaust performance and the filtering performance.

In addition, the mounting portion 25 may include a plurality of second exhaust holes 25a on one circumferential surface so that air passing through the filter member 30 may also be discharged to the side surface of the filter member 30.

The filter member 30 is seated and supported by a sliding door 50 which is slidably drawn outward on one side of the cleaner body 10. At this time, a predetermined space is formed between the seating surface 52 and the filter member 30 of the sliding door 50 so that air passing through the filter member 30 can be discharged into the cleaner body 10. The filter member 30 is preferably coupled to a plurality of spacers 40 on the bottom.

In this case, as shown in FIG. 3, the spacer 40 may secure a space S having a predetermined height between the bottom surface 33 of the filter member 30 and the seating surface 50 of the sliding door 50. . The volume of the space S may be freely set by differently manufacturing the height of the spacer 40 in consideration of the exhaust performance and the filtering performance. At this time, the spacer 40 may be made of a material having a hardness capable of maintaining a predetermined space portion S. Preferably, a dustproof member or a sound absorbing member having a predetermined hardness may be used.

In addition, in order to secure the space S, the spacer 40 is separately attached to the bottom surface 33 of the filter member 30, but instead of the space 40, as shown in FIG. 4, the filter member 130 is provided. It is also possible to integrally form a plurality of support protrusions 131 in the bottom portion of the.

The sliding door 50 is slidably coupled to the cleaner body 10 as shown in FIG. 5 so that the sliding door 50 can be pulled out of the mounting unit 25 to the outside of the cleaner body 10 for replacement of the filter member 30. In this case, the sliding door 50 has sliding grooves 51 (see FIG. 3) formed at both sides, and the cleaner main body 10 has guide ends 10a respectively inserted into the pair of sliding grooves 51. Include.

Although the sliding type door is illustrated in the present embodiment, the present invention is not limited thereto, and one side uses a door of a screw coupling method coupled to the cleaner body 10 by a hinge type or a screw hinged to the cleaner body 10. Of course it is possible. In addition, the spacer 40 may be manufactured to be directly seated on the inner circumferential surface of the cleaner body 10.

Referring to the operation and effect of the vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention configured as described above are as follows.

6 is a cross-sectional view schematically illustrating an intake path of air sucked into a vacuum cleaner having a motor noise reduction structure according to an embodiment of the present invention.

As shown in FIG. 6, when the motor 21 rotates, the air around the suction brush (not shown) is sucked into the cyclone dust collector 13 along with the dirt on the surface to be cleaned. The sucked air is separated from the dust by the centrifugal force in the cyclone dust collecting unit 13, filtered by a predetermined filter (not shown), and then flows into the motor unit 17 through the connecting passage 15.

The air flowing into the motor unit 17 passes through the motor window 21a and sequentially passes through the plurality of first and second holes 19a and 19b of the inner casing 19, and then the outer casing 20 The filter member 30 passes through the plurality of first exhaust holes 20a.

In this case, in one embodiment of the present invention, a plurality of second exhaust holes 25a of the motor outer casing 20 are omitted by omitting the conventional long exhaust passage formed between the outer casing 20 and the filter member 30. By directly discharging the filtered air directly through the filter member 30 from the vibration can be fundamentally eliminated by the separate exhaust passage and the resulting noise.

Subsequently, the air passing through the filter member 30 is formed by the second exhaust hole 25a and the spacer 40 of the mounting portion 25 and the bottom surface 33 of the exhaust filter and the seating surface 52 of the sliding door. It is discharged into the cleaner body 10 through the unit (S). In this embodiment, the direction of the air discharged through the filter member 30 is discharged in the direction of the dust collecting unit 13, but is not directly discharged to the outside of the cleaner body 10 directly discharged directly to the space of the cleaner body 10 All that applies.

As such, the air discharged into the cleaner body 10 is discharged to the outside of the cleaner body through a predetermined grill part or an exhaust hole formed in a part of the cleaner body 10.

In this case, since one embodiment of the present invention has a structure in which the filter member 30 is not coupled to the inner circumferential surface of the cleaner body 10, according to the exhaust filter disposed to be mounted on the cleaner body 10 as in the prior art, The positioning of the predetermined grille or the exhaust hole can be prevented from being determined already, thereby eliminating the constraints that may be applied when designing the cleaner body 10.

Meanwhile, in the exemplary embodiment of the present invention, the motor is installed in the vertical direction so that the motor shaft is disposed in the vertical direction with respect to the cleaner body 10. When the motor is installed in the vertical direction, as shown in FIG. Compared to the case in which the motor is installed in the horizontal direction so that the motor shaft is disposed in the horizontal direction with respect to the cleaner body 10, the peak of the motor rotation frequency component that consumers can feel (when the consumer has the motor rotation frequency component of 5 dBA relative to the base) This can reduce the detectable sound by about 5 dBA. This noise difference is caused when the motor is placed horizontally, the vibration generated by the rotation of the motor shaft is larger than the vertical arrangement.

In the present invention described above, the conventional long exhaust flow path formed between the outer casing of the motor and the filter member is omitted, and after filtering the air discharged from the exhaust casing of the motor outer casing through the filter member, immediately into the cleaner body. By discharging, it is possible to fundamentally eliminate the vibrations and the noise generated while passing through the restricted exhaust passage.

In addition, since the position of the exhaust filter element installed to be fixed to the inside of the cleaner body is installed on the lower outer side of the outer casing of the motor so as not to be associated with the cleaner body, a predetermined grill part that should be determined according to the filter member when designing the cleaner body Alternatively, the cleaner body can be freely designed without being restricted by the position of the exhaust hole.

While the invention has been shown and described with respect to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (11)

A motor casing disposed inside the cleaner body to surround the motor; It is provided with a filter member detachably coupled to one side of the motor casing, The vacuum cleaner having a motor noise reduction structure, characterized in that for discharging the air discharged from the motor casing through the filter member to the inside of the cleaner body. The vacuum cleaner of claim 1, wherein the filter member is disposed to have a space between a bottom surface and an inner circumferential surface of one side of the cleaner body. The vacuum cleaner of claim 1, wherein the motor casing includes a mounting part accommodating the filter member on one side. 4. The motor noise reduction method according to claim 3, wherein the mounting portion has a plurality of first exhaust holes formed on an upper surface thereof, and a plurality of second exhaust holes formed on a main surface thereof for discharging air passing through the filter member. Vacuum cleaner having a structure. The vacuum cleaner according to any one of claims 1 to 3, wherein the filter member has at least one support protrusion integrally formed on a bottom thereof. The motor noise reduction method according to any one of claims 1 to 4, further comprising at least one spacer interposed between the bottom face of the filter member and the inside of the cleaner body facing the bottom face of the filter member. Vacuum cleaner having a structure. The vacuum cleaner of claim 6, wherein the spacer is a dustproof member or a sound absorbing member. The motor of claim 3, further comprising a door installed at a portion of the cleaner body facing the bottom of the filter member to open and close a portion of the cleaner body to be pulled out of the cleaner body to the outside of the cleaner body. Vacuum cleaner with noise reduction structure. The vacuum cleaner of claim 8, wherein the doors are slidably coupled to both sides of the cleaner body. The vacuum cleaner of claim 8, wherein one side of the door is hinged to the cleaner body. The vacuum cleaner of claim 8, wherein the door is screwed to the cleaner body.

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