KR20070057535A - Vacuum cleaner having connecting path for reducing noise - Google Patents

Abstract

A vacuum cleaner having a connecting passage for reducing noise is provided to restrict air passing through the connecting passage from colliding continuously at one place by mounting a partition at a discharge connecting hole of the connecting passage and to decrease low frequency noise by distributing air to the connecting passage and the partition. An intake connecting hole(15a) and an exhaust connecting hole(15b) are formed in a connecting passage(15) of a vacuum cleaner to guide air from a cyclone dust collector to a motor. The intake connecting hole is communicated with the cyclone dust collector, and the exhaust connecting hole is communicated with the motor. A partition is formed in the exhaust connecting hole of the connecting passage to restrict air from be concentrated at one place by centrifugal force in the connecting passage. The partition is vertically installed along the moving direction of air to minimize interference with air flow, and integrally formed with the connecting passage.

Description

Vacuum cleaner with noise reduction connection flow channel {VACUUM CLEANER HAVING CONNECTING PATH FOR REDUCING NOISE}

1 is a schematic cross-sectional view showing a vacuum cleaner having a connection passage for noise reduction according to an embodiment of the present invention;

FIG. 2 is a side view illustrating a noise reduction connection channel disposed between the dust collector and the motor shown in FIG. 1;

3 is a cross-sectional view taken along the line A-A shown in FIG.

4 is a graph comparing noise generated in a connection passage for reducing noise according to the present invention and a conventional connection passage;

FIG. 5 is a cross-sectional view illustrating another embodiment of a noise reduction connection channel disposed between the dust collector and the motor shown in FIG. 1.

* Description of Signs for Main Parts in Drawings *

13: dust collector 15: connection euro

15a: intake connection hole 15b: exhaust connection hole

15c: hollow part 15d: inner circumferential surface

15e: flange 17: fan assembly

18: motor 20,120,121: splitter

21: one side of the diaphragm

The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner having a connection flow path connecting the dust collector and the motor.

In general, the vacuum cleaner is a device for cleaning the surface to be cleaned by generating a vacuum pressure in the suction brush in accordance with the driving of the motor to suck the dust on the surface to be cleaned together with the surrounding air, and then separate the dust from the sucked air. Such a vacuum cleaner is provided with a dust collector, a filter which separates and collects dust from suction air, and a connection flow path which communicates with the dust collector and a motor.

Such a conventional vacuum cleaner mainly uses a dust collector using a cyclone method in consideration of dust collection efficiency. The air discharged from the cyclone dust collector is introduced into a motor through a connection flow path with a predetermined centrifugal force.

At this time, the connection flow passage is formed in a round shape having a predetermined diameter as a whole so as not to interfere with the flow of air introduced into the connection flow passage. By the way, the structure of the connection flow path is such that the flow of air rapidly discharged from the cyclone dust collector with a predetermined centrifugal force is concentrated in one part.

That is, the air collides strongly with the inner circumferential surface of the connecting pipe, in particular, the inner circumferential surface of the tangential side. Thus, the air intensively collides with only one place in the connecting passage, thereby generating noise due to the collision. Such noise mainly has a noise level of the low frequency band, and the noise of the low frequency band is known to have a greater effect on the overall vacuum cleaner noise than the noise of the high frequency band.

However, in the related art, it has been difficult to find a structure for reducing the noise generated on the connection channel, and one example of the related art includes attaching a sound absorbing / sound insulating material to the inner wall of the connection channel.

By the way, in the prior art, the suction of the fine dust due to the characteristics of the cleaner, wherein the sound absorbing / sound insulating material having a plurality of fine pores due to the nature of the material is the air containing the fine dust that is not filtered in the dust collector While passing through the fine dust, there was a problem of reducing the sound absorption and sound insulation effect by blocking the pores of the sound absorbing / sound insulating material.

In addition, such sound absorbing and insulating material exhibits the proper function of the sound absorbing and sound absorbing material, such as failure to endure the rapid flow rate of the air flowing into the connecting flow passage, due to the nature of the material having a lot of fine pores and relatively weak durability. There was a problem that can not.

Therefore, the present invention is to solve such a problem, the object of the present invention is to provide a vacuum cleaner having a noise reduction connection flow path for preventing the collision of concentrated air in one place as the air is concentrated to one side in the connection flow path. have.

In order to achieve the above object, the present invention includes an intake connecting hole and an exhaust connection hole, the intake connecting hole is in communication with the cyclone dust collector and the exhaust connection hole is in communication with the motor to guide the air discharged from the cyclone dust collector to the motor. In the vacuum cleaner having a connecting flow path for providing, at least one diaphragm provided on the side of the exhaust connection hole in the connecting flow path, in order to prevent the air from being concentrated in one place by the centrifugal force on the connection flow path. Provided is a vacuum cleaner having a noise reduction connecting passage.

The diaphragm is preferably installed vertically along the flow direction of the air so as to minimize interference in the flow direction of the air. In addition, the diaphragm may be formed integrally with the connecting flow path.

Accordingly, in the present invention, as the diaphragm is installed toward the discharge connection hole on the connection flow passage, air passing through the connection flow passage at high speed is concentrated in one place in the connection flow passage, thereby preventing the phenomenon that all air continuously collides with only one place. Accordingly, by dispersing the collision part of the air to various places such as the connecting flow path and the diaphragm, it is possible to reduce the noise of the low frequency band generated by the collision concentration phenomenon of the air.

Hereinafter, with reference to the accompanying drawings, a vacuum cleaner having a noise reduction connection channel according to the present invention will be described.

1 is a schematic cross-sectional view showing a vacuum cleaner having a connection channel for noise reduction according to an embodiment of the present invention, and FIG. 2 is a noise reduction connection channel disposed between the dust collector and the motor shown in FIG. 3 is a cross-sectional view taken along line AA shown in FIG. 2.

First, as shown in FIG. 1, 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 adopts a cyclone method in consideration of dust collecting efficiency, and air including dust is introduced into the lower part through the intake unit 11.

In addition, the cyclone dust collector 13 separates and collects dust from the air introduced into the dust collector 13 by using a centrifugal force, and then exhausts 14 formed thereon the air filtered by a predetermined filter (not shown). Discharge through).

As shown in FIG. 1, the connection flow path 15 disposed between the cyclone dust collector 13 and the fan assembly 17 serves to guide the air discharged from the cyclone dust collector 13 to the fan assembly 17.

The connection passage 15 includes an intake connecting hole 15a communicating with the cyclone dust collecting part 13 at one end thereof, and an exhaust connection hole 15b communicating with the upper end 17a of the fan assembly 17 at the other end thereof. In this case, the intake / exhaust connection holes 15a and 15b are connected to the channel 15 in consideration of the set height of the exhaust 14 of the cyclone dust collector 13 and the height of the upper end 17a of the fan assembly 17. It is formed in a substantially perpendicular direction on the phase.

In addition, the connection flow path 15 has an intake connection hole 15a side coupled to the exhaust part 14 side of the cyclone dust collecting part 13 in a fitted state, and the exhaust connection hole 15b side has a fan assembly 17. It is fixedly coupled to the upper side of the fan assembly 17 by using a predetermined screw (not shown) through the flange (15e) formed around the exhaust connection hole (15b) in the state inserted into the upper end of.

On the other hand, a diaphragm 20 having a predetermined width is provided in the space portion 15c of the connection flow path 15 as shown in FIGS. 2 and 3. In this case, the diaphragm 20 is installed along the flow direction of the air so as to minimize interference with the flow direction of the air passing through the space portion 15c, it is preferable to install vertically as shown in FIG. That is, the upper end and the rear end of the diaphragm 20 are fixed to the upper 15f and the rear 15g of the inner peripheral surface of the connection flow path 15, respectively.

The length of the diaphragm 20 is that the air flows from the intake connection hole 15a to the exhaust connection hole 15b side and is directed to only one inner circumferential surface 15d (see FIG. 3) of the connection flow path 15. In order to prevent this, the flow amount of the flowing air can be divided into roughly the same amount. For example, it is preferable to have a length enough to divide the exhaust connection hole 15b into two.

FIG. 5 is a cross-sectional view illustrating another embodiment of a noise reduction connection channel disposed between the dust collector and the motor shown in FIG. 1.

In the above embodiment, the diaphragm 20 is configured as a single unit, but as shown in FIG. 5, the present invention may of course arrange two diaphragms 120 and 121 disposed substantially parallel to the inner side of the coupling passage 15.

In this way, it is also possible to include at least a plurality of diaphragms, but when setting the number of diaphragms, the discharge air through the discharge connection holes 15b compared to the flow rate of the air introduced into the connection flow path 15 through the intake connection holes 15a. It is preferable to manufacture in consideration of the suction efficiency of the vacuum cleaner together with the discharge flow rate.

First, the operation of the vacuum cleaner having the noise reduction connection channel having the above-described configuration will be described with reference to FIGS. 1 to 4 attached thereto, with reference to a connection channel that can reduce noise.

First, when the motor 18 rotates, the air around the suction brush (not shown) is sucked into the cyclone dust collector 13 together with the dirt on the surface to be cleaned. The intake air is separated from the dust by the centrifugal force in the cyclone dust collector 13, and then filtered by a predetermined filter (not shown). The filtered air is discharged from the cyclone dust collector 13 through the exhaust 14.

The air discharged through the exhaust part 14 is introduced into the connection flow path 15 at a high flow rate through the inflow connection hole 15a with the centrifugal force slightly weakened. The air introduced into the connecting passage 15 moves toward one inner peripheral surface 15d of the space portion 15c of the connecting passage 15 in a state having a predetermined centrifugal force (see FIG. 3).

In this case, the air passing through the connection flow path 15 is divided at a substantially similar flow rate by the diaphragm 20 set on the exhaust connection hole 15b side, and the divided air is discharged through the exhaust connection hole 15b. . At this time, the air divided into two by the diaphragm 20 is to collide with the one inner peripheral surface 15d and the one side surface 21 of the diaphragm 15, respectively, as shown in FIG. Accordingly, the air flow rate is divided into two by the diaphragm 20 and at the same time, the collision part in the connection flow path 15 is distributed to several places, thereby reducing noise generated by the collision concentration phenomenon of air. .

The graph measuring the noise is shown in FIG. 4. This graph shows the result of comparing and measuring the noise of the vacuum cleaner with the noise reduction connection channel of the present invention, and the vacuum cleaner with the conventional connection channel.

Referring to this graph, it can be seen that the noise generated in the connection flow path 15 mostly occurs in the low frequency band, and the present invention is on average about 2 to 3 dbA lower than in the prior art.

Therefore, considering that the band affecting the overall noise level of the vacuum cleaner as described above is a low frequency band, an embodiment of the present invention can reduce the overall noise of the vacuum cleaner by reducing the noise in the low frequency band. It can be seen that the effect can be obtained.

On the other hand, the air discharged through the exhaust connection hole 15b of the connection passage 15 flows into the motor 18 in the fan assembly 17 and then opens a plurality of discharge holes 18a around the motor 18. Through the outside.

In the present invention described above, as the diaphragm is installed toward the discharge connection hole on the connection flow passage, air passing through the connection flow passage at high speed is concentrated in one place in the connection flow passage, thereby preventing the phenomenon that all air continuously collides with only one place. Accordingly, by dispersing the collision part of the air to various places such as the connection flow path and the diaphragm, it is possible to reduce the noise of the low frequency band generated by the collision concentration phenomenon of the air.

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 (3)

In the vacuum cleaner having an intake connection hole and an exhaust connection hole, the intake connection hole is in communication with the cyclone dust collector and the exhaust connection hole is in communication with the motor to guide the air discharged from the cyclone dust collector to the motor. In order to prevent the air from colliding intensively in one place while being concentrated to one side by the centrifugal force on the connecting passage, at least one diaphragm is provided on the side of the exhaust connecting hole in the connecting passage. A vacuum cleaner The vacuum cleaner of claim 1, wherein the diaphragm is installed vertically along the moving direction of the air so as to minimize interference with the moving direction of the air in the connecting flow path. The vacuum cleaner of claim 1 or 2, wherein the diaphragm is integrally formed with the connection passage.

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