KR100710392B1 - Vacuum cleaner - Google Patents

Abstract

The present invention relates to a vacuum cleaner that can be improved in structure to reduce noise. According to an aspect of the present invention, there is provided a vacuum cleaner body, a fan-motor assembly for sucking and flowing air into the cleaner body, a motor housing having a chamber housing accommodating the fan motor assembly, and a chamber cover installed on the chamber housing. It provides a vacuum cleaner including an upper chamber cover provided on the upper portion of the motor chamber, and a flow guide nozzle for smoothly guiding air introduced into the upper chamber cover into the fan-motor assembly.

According to the present invention, by installing a flow guide nozzle between the upper chamber cover and the motor chamber can reduce the noise of the vacuum cleaner generated by the air flow.

Vacuum cleaner, motor chamber, flow guide nozzle, noise

Description

Vacuum cleaner {Vacuum cleaner}

1 is a perspective view of a vacuum cleaner according to the present invention.

FIG. 2 is a perspective view illustrating the cleaner body and the dust collector of FIG. 1 separately; FIG.

3 is an exploded perspective view of the vacuum cleaner of FIG. 1.

Figure 4 is a bottom view of the upper chamber cover formed on the upper case of the vacuum cleaner according to the present invention.

5 is a view showing another embodiment of the flow guide nozzle of the vacuum cleaner according to the present invention.

Figure 6a is a graph showing the noise measured at the top of the vacuum cleaner of Figure 1;

Figure 6b is a graph showing the noise measured from the side in the vacuum cleaner of Figure 1;

<Description of the symbols for the main parts of the drawings>

100: cleaner body 130: fan motor assembly

131: motor inlet 200: dust collector

310: auxiliary chamber housing 320: chamber housing

330: chamber cover 400, 4000: flow guide nozzle

410, 4100: nozzle body 420, 4200: lower connection

430: sealing member 500: upper chamber cover

510: cover inlet 520: inclined portion

4300: auxiliary flow guide

The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner that can reduce noise while reducing flow resistance.

In general, a vacuum cleaner includes a suction nozzle for suctioning foreign substances such as dust accumulated on the floor, a cleaner main body having a dust collecting device for separating and collecting foreign substances, and a connection pipe for guiding foreign substances sucked from the suction nozzle to the cleaner main body. It is configured to include.

The cleaner main body is provided with an air suction device for forcibly flowing the incoming air, and a predetermined position of the cleaner main body is provided with a dust collecting unit accommodating unit for accommodating a dust collecting unit.

And, the cleaner body is provided with a cleaner handle that can carry the cleaner body. In addition, one driving wheel is provided at each of both rear sides of the cleaner body, and a caster of a rotating material for changing the direction of the cleaner body is provided at the front surface of the bottom of the cleaner body.

Briefly looking at the operation of the vacuum cleaner configured as described above are as follows.

First, when the operation button for operating the vacuum cleaner is pressed, air containing foreign matter is sucked through the suction nozzle, and the sucked air is sucked into the cleaner body through the main body suction port. Air passing through the main body suction port flows into the dust collector, and foreign matter is primarily separated from the dust collector.

Next, the air from which the foreign matter is first separated from the dust collector is introduced into the air suction device along the connection flow path formed inside the cleaner body. Next, the air passing through the air suction device is moved to the exhaust chamber, and the foreign matter is again filtered out of the exhaust chamber.

Here, the suction device cover is installed at the end of the connection flow path for inducing air from the dust collector to the air suction device. The suction device cover is manufactured to correspond to the upper portion of the air suction device for airtightness inside the vacuum cleaner.

At this time, the cross-sectional area of the suction device cover is larger than the cross-sectional area of the connection channel, so that the air moving along the connection channel is introduced into the suction device cover and causes a rapid flow change.

In addition, the cross-sectional area of the connection flow path and the cross-sectional area of the mosque inlet formed in the air suction device are different in size and shape, and there is a sudden flow change because there is no separate intermediate member connecting the connection flow path and the motor intake port.

That is, a rapid flow change occurs in the suction device cover provided in the conventional vacuum cleaner, and thus there is a problem that the flow noise is increased.

In addition, there is a problem that the flow resistance is increased because the air flow is not smooth due to the rapid flow change of air. And, in the related art, it was not possible to solve the complaints of the vacuum cleaner users due to the flow noise, thereby reducing the reliability of the product.

The present invention is to solve the above-mentioned problems, an object of the present invention is to provide a vacuum cleaner that can reduce the flow noise by preventing a sudden flow change of air.

Another object of the present invention is to provide a vacuum cleaner capable of smoothing the flow of the discharged air to reduce the flow resistance and increase the reliability of the product.

In order to achieve the above object, the present invention provides a cleaner body, a fan-motor assembly for suction and forced flow of air into the cleaner body, a chamber housing for accommodating the fan-motor assembly, and a chamber installed on the chamber housing. A vacuum cleaner including a motor chamber having a cover, an upper chamber cover provided at an upper portion of the motor chamber, and a flow guide nozzle for smoothly guiding air introduced into the upper chamber cover into the fan-motor assembly. to provide.

The flow guide nozzle is preferably detachably installed on the bottom of the upper chamber cover.

The flow guide nozzle preferably includes a nozzle body having a same central axis as the motor inlet and having a through hole for communicating the upper chamber cover with the motor inlet.

The flow guide nozzle is preferably configured to further include a lower connection portion formed integrally with the lower portion of the nozzle body.

It is preferable that a fastening hole for fastening with the upper chamber cover is formed in the upper edge of the nozzle body.

The diameter of the through hole is preferably substantially the same as the diameter of the motor inlet.

The lower end of the lower connection portion is preferably formed to protrude in the motor chamber direction. In addition, a sealing member may be installed between the lower end of the lower connection portion and the motor chamber.

The center portion of the nozzle body is concave, it is preferable that the diameter of the nozzle body is gradually reduced from the upper edge of the nozzle body toward the lower direction.

The nozzle body is preferably symmetrical about the through hole. Of course, the edge shape of the nozzle body may be formed substantially the same as the edge shape of the inclined portion formed in the upper chamber cover.

On one side of the nozzle body it is preferable that the auxiliary flow guide portion for guiding the air more efficiently to the chamber inlet is formed integrally.

The upper chamber cover is preferably formed at the end of the connection passage for guiding the flow of air from the dust collector installed in the cleaner body to the motor chamber.

The lower end of the upper chamber cover is preferably coupled to the chamber inlet formed in the chamber cover.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the vacuum cleaner according to the present invention.

1 is a perspective view showing the appearance of a vacuum cleaner according to the present invention. Figure 2 is a view showing a state in which the cleaner body and the dust collector is separated, Figure 3 is an exploded perspective view showing a separate vacuum cleaner according to the present invention.

1 to 3, the vacuum cleaner according to the present invention moves along the floor to be cleaned, and a suction nozzle (not shown) for sucking air containing foreign substances, and a cleaner body 100 provided separately from the suction nozzle. And a connecting pipe (not shown) which interconnects the suction nozzle and the cleaner body 100 and simultaneously guides the air sucked from the suction nozzle to the cleaner body 100.

Here, a nozzle suction port (not shown) of a predetermined size is formed at the bottom of the suction nozzle, and foreign matter accumulated on the bottom is sucked into the cleaner body together with air.

The front portion of the cleaner body is in communication with the suction nozzle, the main body suction opening 162 for introducing air into the interior of the cleaner body, the side of the cleaner body main body exhaust port for discharging air to the outside of the cleaner body ( Not shown).

In addition, a cleaner handle 161 is provided at the upper end of the cleaner body so as to carry the cleaner body, and at both rear sides of the cleaner body 100, wheels may be used to smoothly move the bottom surface of the cleaner body 100. 110 are rotatably mounted respectively. A caster (not shown) of rotating material is connected to the bottom front portion of the cleaner body 100 to change the direction of the cleaner body 100.

In addition, the dust collector 200 is detachably mounted to the rear portion of the cleaner body 100. The dust collector 200 functions to separate and collect the foreign matter from the air sucked from the suction nozzle. The dust collecting device includes a cylindrical dust collecting container 210, a dust collecting container cover 230 installed on the upper portion of the dust collecting container, and a dust collecting device handle 250 provided to carry the dust collecting device.

In addition, the inside of the cleaner body 100 is provided with an electric unit (not shown) for controlling the vacuum cleaner, and a fan-motor assembly 130 for suctioning and forcibly flowing air into the cleaner body.

The fan-motor assembly 130 is accommodated in a cylindrical motor chamber, and the motor chamber is installed in the lower case 120 of the cleaner body.

A side of the motor chamber is provided with an exhaust chamber 140 through which air through the motor chamber is discharged. The exhaust chamber 140 is provided with an exhaust filter (not shown) for filtering out foreign substances contained in the air again before the air passing through the motor chamber is discharged to the outside.

The exhaust filter (not shown) preferably uses a hepa filter for filtering fine dust. The air passing through the filter is discharged to the outside through a main body exhaust port (not shown) formed in the exhaust chamber cover 141.

And, the cord reel 150 is installed behind the motor chamber. The cord reel 150 functions to wind and store a connection cord provided to supply power to the cleaner body. In addition, the central axis of the cord reel is perpendicular to the ground, and one side of the cord reel is provided with a cord reel button 151 for controlling the operation of the cord reel.

As shown in FIG. 3, the motor chamber according to the present invention includes an auxiliary chamber housing 310 in which the fan-motor assembly 130 is directly received, a chamber housing 320 in which the auxiliary chamber housing 310 is accommodated, and It is configured to include a chamber cover 330 is installed on the top of the chamber housing.

On the bottom surface of the chamber housing 320, a motor installation unit (not shown) in which a fan-motor assembly 130 for suctioning and forcibly flowing air is installed is recessed. In addition, the outer wall of the chamber housing is formed with a grid-shaped exhaust portion 323 through which the air passing through the fan-motor assembly 130 is discharged.

In addition, a sound absorbing material (not shown) is installed between the auxiliary chamber housing 310 and the chamber housing 320 to absorb the noise generated by the fan-motor assembly 130. As the sound absorbing material, not only a porous material but also a flexible material, a porous plate material, and a plate material may be used.

The chamber cover 330 includes a first chamber cover 333 installed on an upper portion of the fan-motor assembly and a second chamber cover 331 provided on an upper portion of the first chamber cover.

The first chamber cover 333 has a chamber inlet 333a corresponding to the shape of the upper portion of the fan-motor assembly, and the upper portion of the fan-motor assembly is inserted into the chamber inlet 333a. The chamber inlet 333a is formed at the center of the first chamber cover 333, and serves as a passage for allowing air discharged from the dust collector of the vacuum cleaner to flow into the motor inlet 131.

The second chamber cover 331 serves to fix the first chamber cover 333 to the cleaner body. A fastening groove 331a having a predetermined shape is formed at an edge of the second chamber cover 331, and the fastening groove 331a is coupled to the cleaner body by a predetermined fastening member.

3 and 4, the structure of the flow guide nozzle and the upper chamber cover in which the flow guide nozzle is installed will be described.

The vacuum cleaner according to the present invention comprises an upper case 160 and a lower case 120 forming the outer shape of the cleaner body. A connection passage 163 is formed inside the upper case to guide the flow of air from the dust collector 200 to the motor chamber.

An upper chamber cover 500 formed integrally with the upper case 160 is provided at the end of the connection channel. The upper chamber cover is installed on the upper portion of the motor chamber, and has a shape and size corresponding to the shape of the upper portion of the motor chamber. That is, the lower end of the upper chamber cover is configured to be inserted into the chamber inlet 333a formed in the chamber cover.

The upper chamber cover 500 may include a cover housing 540 forming an outer shape of the upper chamber cover, a cover inlet 510 formed in the cover housing, and an inclined portion formed outside the cover inlet 510. And 520.

The cover housing has a cylindrical shape, and the cover housing is formed with reinforcing ribs to reinforce the strength of the cover housing.

 The cover inlet 510 is a discharge port of the connection channel connected to the dust collector and has the same shape as the cross section of the connection channel. The cross section of the connection channel and the cover inlet 510 have a rectangular shape with rounded corners. Of course, the shape of the connection flow path and the cover inlet is not limited to this embodiment, and various modifications are possible.

The inclined portion 520 is formed around the outer circumference of the cover inlet and has a predetermined inclination angle in a downward direction with respect to the cover inlet. The inclined portion 520 guides the air passing through the cover inlet to the motor chamber more smoothly.

In addition, the upper chamber cover is formed with a coupling boss 530 for coupling the flow guide nozzle. At least one coupling boss 530 is formed and corresponds to a fastening hole 411 formed in the flow guide nozzle.

Meanwhile, the flow guide nozzle 400 is detachably installed at the bottom of the upper chamber cover 500. The flow guide nozzle 400 smoothly guides the air introduced into the upper chamber cover 500 to the motor inlet 131 formed in the motor chamber. That is, it collects the air discharged from the connection channel to one place serves to guide the motor inlet.

The flow guide nozzle 400 according to the present exemplary embodiment includes a nozzle body 410 coupled to the upper chamber cover, and a lower connection part 420 integrally formed at the lower part of the nozzle body.

The center portion of the nozzle body 410 is formed to be concave downward, the diameter of the nozzle body gradually decreases toward the lower direction from the upper edge of the nozzle body. That is, the nozzle body 410 is formed to be inclined from the top to the bottom.

A fastening hole 411 for fastening with the upper chamber cover is formed at an upper edge of the nozzle body 410, and a through hole 412 serving as a discharge hole of the flow guide nozzle is formed at the center of the nozzle body. Formed.

The fastening hole 411 is coupled to the coupling boss 530 formed in the upper chamber cover, it is coupled by a predetermined fastening member. Of course, the coupling boss 530 and the fastening hole 411 may be coupled by a hook coupling, it may be screwed.

The through hole 412 is a passage through which the air flows when air inside the upper chamber cover flows into the motor chamber. The diameter of the through hole 412 is substantially the same as that of the motor inlet. do. The nozzle body is symmetrically formed around the through hole.

In addition, the through hole and the motor suction port is preferably formed to have the same central axis. This is because if the through hole and the motor inlet have the same central axis, the change in the flow path is reduced, and the flow noise and the flow resistance due to the change in the flow path are reduced.

The lower connecting portion 420 forms a lower edge of the through hole and protrudes in the direction of the motor chamber.

In addition, a sealing member 430 is installed between the lower end of the lower connection portion and the motor chamber. The sealing member 430 is for preventing the leakage of air generated in the process of the air passing through the through hole 412 to the motor inlet. The sealing member 430 is preferably attached to the lower end of the lower connecting portion having an annular shape.

Referring to Figure 5, another embodiment of the flow guide nozzle according to the present invention will be described.

The flow guide nozzle 4000 according to the present embodiment is configured to include a nozzle body 4100 coupled to the upper chamber cover and a lower connection part 4200 integrally formed under the nozzle body, as in the above-described embodiment. do. In addition, a fastening hole 4110 for coupling the nozzle body to the upper chamber cover is formed at an upper edge of the nozzle body, and a through hole 4210 serving as a discharge port of the flow guide nozzle is formed at the center of the nozzle body. Is formed.

However, unlike the embodiment described above, the edge of the nozzle body 4100 in this embodiment has a shape substantially the same as the inclined portion (520 of Figure 4) formed on the upper chamber cover. That is, the edge of the nozzle body 4100 and the inclined portion (520 of FIG. 4) of the upper chamber cover have a rectangular shape with rounded corners. Since the edge of the nozzle body and the inclined portion of the upper chamber cover have substantially the same shape, it is possible to more effectively prevent the sudden flow change generated when air is introduced into the motor inlet from the upper chamber cover.

In addition, the flow guide nozzle 4000 according to the present embodiment includes an auxiliary flow guide part 4300 for guiding the air to the motor inlet more efficiently.

The auxiliary flow guide 4300 is installed at one side of the nozzle body to guide the air introduced into the upper chamber cover to the motor inlet when the auxiliary inlet is formed separately from the cover inlet 520 of FIG. 4. .

Of course, even when there is no separate auxiliary inlet in the upper chamber cover, the auxiliary flow guide 4300 may be additionally installed in a portion having a large air flow rate in consideration of the flow direction of air introduced into the upper chamber cover.

6A illustrates noise measured at a position 1 m away from an upper portion of the cleaner body, and FIG. 6B is a graph illustrating noise measured at a position 1 m away from a side of the cleaner body. With reference to this, a graph measuring the sound pressure according to the frequency of the noise generated in the vacuum cleaner according to the present invention will be described.

The unit for measuring noise uses sound pressure and sound power, which means the emissivity of sound energy per unit time, and the sound pressure means the pressure generated by sound waves emitted by sound energy.

In the present embodiment, the graph indicated by the dotted line is a noise measurement of the vacuum cleaner without the flow guide nozzle, that is, the vacuum cleaner according to the prior art, and the graph indicated by the solid line shows the vacuum cleaner according to the present invention with the flow guide nozzle installed. The noise is measured.

Referring to Figure 6a, looking at the result of measuring the noise from the upper portion of the cleaner body, when the frequency of the noise is 5000Hz or more it can be seen that the sound pressure level of the noise in the prior art and the present invention is similar level. On the other hand, when the frequency of the noise is less than 2000Hz it can be seen that the sound pressure level of the noise according to the present invention is reduced. In particular, it can be seen that the sound pressure level of the vacuum cleaner according to the present invention is significantly reduced between 250 Hz and 500 Hz.

Referring to Figure 6b, looking at the result of measuring the noise from the side of the cleaner body, when the frequency of the noise is similarly between 250Hz ~ 500Hz sound pressure level of the vacuum cleaner according to the present invention sound pressure level of the vacuum cleaner according to the prior art It can be seen that lower.

As a result, the vacuum cleaner according to the present invention reduces the sound pressure level of the noise generated on the average compared to the vacuum cleaner according to the prior art by about 1 dB. In particular, it can be seen that the sound pressure level is significantly lowered when the noise is at a low frequency.

On the other hand, the suction work rate of the vacuum cleaner according to the present invention will increase about 10 watts (W) than the suction work rate of the conventional vacuum cleaner. The suction power rate in the vacuum cleaner represents the intensity of sucking dust, and the unit of suction power rate is watt (W). That is, the suction work rate represents the output of the motor that sucks air. The suction work rate corresponds to one index indicating the performance of the vacuum cleaner, and the larger the suction work rate, the better the dust collection performance. As a result, the noise generated while improving the dust collection performance of the vacuum cleaner by installing the flow guide nozzle according to the present invention is reduced.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications without departing from the spirit of the present invention, and such modifications are within the scope of the present invention.

The effect of the vacuum cleaner according to the present invention described above is as follows.

First, according to the present invention, the air flowing into the upper chamber cover is smoothly guided to the motor inlet by installing a separate flow guide nozzle on the bottom of the upper chamber cover. Therefore, there is an advantage that a sudden flow change inside the vacuum cleaner is prevented and the flow noise is reduced.

Second, according to the present invention, since the flow guide nozzle is located in the space formed by the upper chamber cover and the upper portion of the motor chamber, the overall length of the flow path is substantially the same, and the air is smoothly guided, thereby reducing the flow resistance. .

Third, by installing a flow guide nozzle to smooth the flow of air flow noise and flow resistance is reduced, there is an advantage that the suction work rate is increased.

Fourth, there is an advantage that it is possible to more effectively prevent a sudden flow change by making the rim shape of the inclined portion of the upper chamber cover and the rim shape of the nozzle body substantially the same.

Fifth, by reducing the noise generated in the vacuum cleaner can solve the user's complaints, there is an advantage that can increase the reliability of the product.

Claims (14)

A cleaner body; A fan-motor assembly that sucks air into the cleaner body and forces the air to flow; A motor chamber having a chamber housing accommodating the fan-motor assembly and a chamber cover installed at an upper portion of the chamber housing; An upper chamber cover provided at an upper portion of the motor chamber; And, And a flow guide nozzle for smoothly guiding the air introduced into the upper chamber cover into the fan-motor assembly. The method of claim 1, The flow guide nozzle is a vacuum cleaner, characterized in that detachably installed on the bottom of the upper chamber cover. The method of claim 2, And the flow guide nozzle comprises a nozzle body having a same central axis as that of the motor inlet formed in the fan-motor assembly and having a through hole through which the upper chamber cover and the motor inlet communicate with each other. The method of claim 3, The flow guide nozzle is a vacuum cleaner, characterized in that it further comprises a lower connecting portion formed integrally with the lower portion of the nozzle body. The method according to claim 3 or 4, The upper edge of the nozzle body is a vacuum cleaner, characterized in that the fastening hole for fastening with the upper chamber cover is formed. The method of claim 5, The diameter of the through-hole vacuum cleaner, characterized in that the same as the diameter of the motor suction port. The method of claim 5, The lower end of the lower connection portion is a vacuum cleaner, characterized in that protruding in the motor chamber direction. The method of claim 4, wherein And a sealing member installed between the lower end of the lower connection portion and the motor chamber. The method according to claim 3 or 4, The central portion of the nozzle body is formed in a concave, vacuum cleaner, characterized in that the diameter of the nozzle body gradually decreases toward the lower direction from the upper edge of the nozzle body. The method of claim 9, The nozzle body is a vacuum cleaner, characterized in that the symmetrical around the through-hole. The method according to claim 3 or 4, The edge shape of the nozzle body is a vacuum cleaner, characterized in that the same as the edge shape of the inclined portion formed on the upper chamber cover. The method of claim 11, One side of the nozzle body is a vacuum cleaner, characterized in that the auxiliary flow guide portion for guiding the air to the motor inlet more efficiently formed integrally. The method according to any one of claims 1 to 4, The upper chamber cover is a vacuum cleaner, characterized in that formed integrally at the end of the connecting flow path for guiding the flow of air from the dust collector installed in the cleaner body to the motor chamber. The method of claim 13, And a lower end of the upper chamber cover is inserted into a chamber inlet formed in the chamber cover.

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