KR100596449B1 - A noise decrease equipment for vacuum cleaner - Google Patents

Abstract

The present invention relates to a noise reduction device for a vacuum cleaner, and more particularly, a device for reducing noise by being installed in or inside the vacuum cleaner's suction brush, connecting pipe, and dust container, respectively, having abundant micropores and voids and absorbing sound. The excellent thermoplastic resin sintered porous sound absorbing material is used as the material, and has excellent noise reduction effect.

Vacuum cleaner, thermoplastic resin sintered porous sound absorber, resonance chamber, induction pipe

Description

Noise reduction device for vacuum cleaners {A noise decrease equipment for vacuum cleaner}

1 is a perspective view showing a suction port portion of a conventional vacuum cleaner

Figure 2 is a state of use of the noise reduction device for a vacuum cleaner according to the present invention

Figure 3 is a detailed view of the inlet noise reduction module according to the present invention

Figure 4 (a) (b) is a front sectional view showing the air flow of the present invention and the conventional inlet noise reduction module

Figure 5 (a) (b) is a side cross-sectional view showing the air flow of the present invention and the conventional inlet noise reduction module

Figure 6 is a perspective view showing a dust container noise reduction module according to the present invention

Figure 7 is an exploded perspective view of the dust container portion according to the present invention

Figure 8 (a) (b) is an air flow diagram of the dust container portion of the present invention and conventional

Figure 9 (a) (b) is a noise measurement of the inlet portion of the present invention

Figure 10 (a) (b) is a noise measurement of the conventional suction port portion

<Description of Symbols for Main Parts of Drawings>

10: inlet noise reduction module 12: main body

24: guide pipe 26: connector noise reduction module

30: dust box noise reduction module 100: friction sound

200: connection ring 300: resonance sound

The present invention relates to a noise reduction device for a vacuum cleaner, and more particularly, made of a thermoplastic resin sintered porous sound absorbing material, and formed of a suction port, a connection pipe, and a dust reduction module for noise reduction, respectively, generated in a suction brush or a dust box of a vacuum cleaner. A noise reduction device for a vacuum cleaner that reduces noise.

A vacuum cleaner used to suck dust or debris is generally composed of a suction brush that sucks ambient air, a main body, and a connection pipe connecting the suction brush and the main body, where the air sucked from the suction brush In some cases, it may further include a dust bucket that primarily filters out large foreign matters. The dust container is divided into a main body type and a handle type installed in communication with a connection pipe at the bottom of the handle, and the noise occurs more large in the handle type than the main body type.

In addition, the vacuum cleaner makes the interior vacuum by sucking the dust or debris through the suction brush by starting the motor of the main body, which is convenient for cleaning, but there is a problem that severe noise is generated by starting the motor.

The noise of the vacuum cleaner is mainly generated in the vicinity of the suction brush and the dust container where a high pressure air flow is formed due to the noise and the vacuum action caused by the start of the motor, that is, the high speed rotation of the centrifugal impeller (typically 30,000 rpm to 40,000 rpm). .

Due to the recent technology development, the noise reduction to the motor of the vacuum cleaner can be said to be making rapid progress, but the inlet part (here, the inlet part refers to the lower part of the handle of the vacuum cleaner such as the suction brush, the connecting pipe, and the dust container). It is true that the noise reduction of.) Has not been greatly developed, and it is true that the noise reduction of the inlet part is generous compared to the noise of the vacuum cleaner main body.

The noise of the suction part of the vacuum cleaner depends a lot on the flooring material. Due to the development of flooring materials, various types of flooring materials such as carpet, flooring, solid wood, and marble are being used. The harder the flooring, the more the noise level becomes. The softer the flooring material, the better the sound is absorbed and the harder the property is. The harder the flooring material, the louder the noise.

The noise of the inlet part that closes directly to the floor is caused by friction and resonance between the motor and the air flow path, and the noise of 250Hz to 8KHz is mainly generated. Especially, the noise of 4KHz can have a physiological effect on the user when exposed for a long time. When the vacuum cleaner is used, the inlet part is located close to the user, so the user is exposed to noise harmful to the human body. To solve such a problem, the development of the noise reduction device of the inlet part of the vacuum cleaner is urgently needed.

The noise measurement of a general vacuum cleaner is measured as specified in KSCIEC 60704-2-1, but the experimental measurement is different from the actual floor noise measurement. There is a noise deviation of a typical vacuum cleaner main body, but it is about 72db to 76db. And the inlet portion is formed by the vacuum action to create a high pressure air flow, and the connector coupled to the inlet can be rotated at various angles, there are many variations depending on the starting angle of the connector, but usually 78db to 82db That's it.

The inlet portion is not easy to reduce the noise of the inlet portion than the noise reduction of the motor because the noise deviation increases according to the starting angle of the connecting pipe. In particular, the noise of the inlet portion is increased according to the suction port and the high suction power of various functions, but the current technology to reduce the noise is insufficient.

In the conventional vacuum cleaner suction port portion, the air flow path is formed around the upper and lower cases under the control knob for adjusting the suction force, and noise reduction measures of the suction port portion are made of a casing in a streamlined form, and also constitute the suction port portion. The material is made of plastic and aluminum, and it is assembled for easy disassembly and storage, so its effectiveness is low in reducing the noise generated.

The present invention for solving the above problems is to provide a noise reduction device for a vacuum cleaner that can reduce the noise generated in the vicinity of the suction brush of the vacuum cleaner made of a thermoplastic resin sintered porous sound absorbing material, the connection pipe and the dust container There is.

The noise reduction device for a vacuum cleaner according to the present invention for achieving the above object is a device for reducing the noise of a vacuum cleaner comprising a suction brush and a dust container installed in communication with a connecting pipe, comprising a thermoplastic resin sintered porous sound absorbing material. An air inlet corresponding to the inlet of the suction brush is formed at the front end, an air outlet is formed at the rear end, a main body having an air flow path through which the air sucked in the center is formed, and an air flow path formed at the center of both ends of the main body. Inlet noise reduction module consisting of a rear portion of the induction pipe is installed inside the connecting pipe and characterized in that to reduce the noise generated in the suction brush portion.

In the device for reducing the noise of the vacuum cleaner comprising a suction brush and a dust container installed in communication with the connecting pipe, comprising a thermoplastic resin sintered porous sound absorbing material, interconnecting the connecting pipe and the dust container, the connecting pipe A suction inlet flow passage is formed to suck air sucked from the dust container, and an air flow rotating plate through which the air sucked in the suction opening flows is rotated, and air filtered by the foreign matter while passing through the dust container in the center of the air flow rotating plate. It is characterized in that the dust box noise reduction module is formed with a discharge passage to discharge to reduce the noise generated in the dust box.

In addition, the inlet noise reduction module and dust bucket noise reduction module is used together, characterized in that made of a thermoplastic resin sintered porous sound absorbing material further comprises a pipe-shaped connection pipe noise reduction module installed inside the connection pipe It is also preferable.

In addition, the induction pipe is preferably made of a thermoplastic resin sintered porous sound absorbing material or a soft rubber material.

In addition, the front surface of the main body is made of a double is formed in the resonance chamber having an empty space inside, the resonance chamber is preferably a porous fine fiber material or porous foam elastic material is inserted.

The outlet flow passage is formed in a double, the resonance chamber having an empty space portion is formed inside, it is preferable that the porous thin fiber material or porous foam elastic material is inserted into the resonance chamber.

When the thermoplastic resin sintered porous sound-absorbing material is sintered, it is preferable that the activated carbon, photocatalyst, silver nanopowder and zeolite are mixed and sintered to have a deodorizing, antibacterial and sterilizing function.

With reference to the accompanying drawings, the present invention is a device for reducing the noise of the vacuum cleaner as described above in detail.

1 is a perspective view showing a suction port portion of a conventional vacuum cleaner, Figure 2 is a state diagram of the noise reduction device for a vacuum cleaner according to the present invention, Figure 3 is a detailed view of the inlet noise reduction module according to the present invention, Figure 4 (a) (b) is a sectional front view showing the air flow of the present invention and the conventional inlet noise reduction module, Figure 5 (a) (b) is a side sectional view showing the air flow of the present invention and the conventional inlet noise reduction module, Figure 6 is a perspective view showing a noise reduction module according to the present invention, Figure 7 is an exploded perspective view of the dust container according to the present invention, Figure 8 (a) (b) is an air flow diagram of the present invention and the conventional dust container, Figure 9 (a), (b) is a noise measurement diagram of the intake port portion of the present invention, Figure 10 (a) (b) is a noise measurement diagram of the conventional intake port portion.

Referring to FIG. 1, the noise generated from the suction port part, that is, the suction brush 40, the connection pipe 42, and the dust container 46 is illustrated. The inlet portion is directly operated by the user by holding the handle, and typically has a structure capable of starting between about 50 to 80 degrees in the vertical direction, and 180 degrees in the horizontal direction. At this time, the user using the vacuum cleaner is intensively exposed to the noise of the suction port portion.

When the vacuum cleaner is started, air containing dust from the bottom is sucked by the suction brush and flows into the cleaner body along the suction port. At this time, the suction brush friction noise (100), the connection pipe ring (200), and the dust box resonance sound according to the vacuum suction Noise such as 300 is generated and transmitted to the user.

The noise reduction device for a vacuum cleaner of the present invention can effectively attenuate the noise by suppressing the occurrence of the noise for each occurrence of the noise as described above.

Unlike the noise generated in the main body, the noise of the suction part of the vacuum cleaner is generated due to the high pressure and the high flow rate, and there are many difficulties in reducing the noise because the place is narrow. In order to solve these problems, the vacuum cleaner suction port noise reduction device according to the present invention is separately installed in the suction brush 40, the connection pipe 42, and the dust container 46, as shown in FIG. (100), the inlet noise reduction module 10 for reducing the ringing noise (200) and the resonance sound (300), the connection pipe noise reduction module (26) and dust reduction noise reduction module (30) on the surface, It is made of thermoplastic resin sintered porous sound absorbing material with fine pore and low friction and excellent noise effect.

The thermoplastic resin sintered porous sound absorbing material is polyethylene (PE: Polyethylene), polypropylene (PP: Polypropylene), polyester (Polyester), polyvinylidene fluoride (PVDF: Polyvinylidene fluoride) fluorine resin (PTFE: Polytetrafluoroethylene), ultra high molecular weight It is made by sintering thermoplastic resins such as Ultra-High Molecular Weight Polyethylene (UHMW-PE) and Polyether sulfone (PES). It has rich micropores and voids to absorb noise effectively.

In general, among the properties of an object for sound, the practical importance is sound absorption and sound insulation. Sound insulation is the property that the noise that reaches the object does not penetrate and reflects. Generally, the higher the particle size of the material that constitutes the material, the better the effect. Sound absorption means that the noise that reaches the object is converted into some heat energy. It is a property that converts and attenuates noise, and generally porous material is rich in this property.

The porous material has a lot of pores on the surface and when sound waves are incident on the porous material, some are reflected, some are absorbed by vibrating air particles in the surface or the pores of the material, and the others are transmitted. At this time, the sound absorption is caused by the viscosity of the air particles in the pores or by friction with the pore wall surface part of the incident energy is converted into thermal energy, so the particle size and porosity of the porous material is very important for the sound absorption rate. The thermoplastic resin sintered porous sound absorbing material used as the material of the noise reduction device for the vacuum cleaner of the present invention is rich in pores and voids, which is particularly useful for noise reduction due to its excellent sound insulation and sound absorption.

In addition, when the thermoplastic resin sintered porous sound absorbing material is sintered, it is preferable to mix and sinter activated carbon, a photocatalyst, a silver nanopowder, and zeolite to have a deodorizing, antibacterial, and sterilizing function.

First, looking at the inlet noise reduction module 10 of the noise reduction device for a vacuum cleaner according to the present invention, the vacuum cleaner is connected after the air containing the dust is absorbed by the suction brush 40 from the floor by starting the motor of the main body Through the pipe 42, the dust is first filtered out of the dust container 46, and the dust or dust is first filtered out through the filter is fine dust or debris is filtered again to exit the exhaust port. Air, including dust and debris, is generated by friction with the case while passing through the air flow path, and the noise is generated in the vicinity of the suction brush 40 where the friction noise is most severe.

The suction brush 40 is connected through the main body and the connection pipe 42, the front end of the connection pipe 42 is provided with a connector 44 is coupled to the suction brush 40, the connector 44 is When the vacuum cleaner is operated, it is configured to be capable of starting from 50 degrees to 80 degrees in the vertical direction and 180 degrees in the horizontal direction. The noise near the suction brush 40 due to the above operation is shown in FIGS. 4b and 5b. As shown, it appears concentrated in the connector 44 connecting between the suction brush 40 and the connecting pipe 42.

In order to reduce the noise in the vicinity of the suction brush 40 as the intake noise reduction module 10, the intake noise reduction module 10 is shown in Figure 3, 4a and 5a, An air inlet 14 corresponding to the inlet of the brush 40 and an air outlet 16 through which the sucked air is discharged are formed, and the main body 12 having the air passage 18 formed therein as a passage through which the sucked air passes. And an induction pipe 24 installed inside the rear part of the main body 12 and the connection pipe 42.

In addition, the front surface of the main body 12 is formed of a double resonant chamber having an empty space inside is formed, the resonance chamber 20 is a porous thin fiber or porous foam elastic material 22 It is inserted and constructed.

The main body 12 is to reduce friction noise 100 generated in the vicinity of the air and the suction brush 40 including dust or debris, and to enhance the effect of the reduction of the friction noise 100 (Resonance chamber ( 20) is provided, the porous thin fiber material or porous elastic modulus 22 is inserted into the resonance chamber 20 to eliminate the secondary ringing phenomenon.

The induction pipe 24 is to reduce the noise generated from the connector 44, the air flow path is formed in the center and one end is coupled to the inside of the main body 12, the other end is the inside of the connector 44 Is installed on. The induction pipe 24 smoothes the air flow path of the connector 44 moving up, down, left and right so as not to impede flow, thereby reducing noise.

The material of the induction pipe 24 according to the present invention may be a thermoplastic resin-sintered porous sound absorbing material. It is also preferable that the induction pipe 24 is made of urethane or rubber material having good warpage and maneuverability due to the characteristics of the maneuver of the connector 44.

The inlet noise reduction module 10 configured as described above is made of a thermoplastic resin sintered porous sound absorbing material having excellent noise effect while having a small pore on the surface, and excellent noise reduction effect, and the resonance chamber 20 in the main body 12. There is provided an effect that can reduce the noise of the mid-low band.

Next, looking at the noise source of the dust container 46, the air containing the dust coming through the suction brush 40 and the connecting pipe 42 is introduced along the suction flow path as shown in the air flow diagram near the dust box of Figure 8b, the air flow rotating plate After rotating along the air containing the dust rises toward the dust box.

At this time, the elevated air has a centrifugal force to rotate around the dust filter grill 48, and the rotated air is separated from the air containing dust by the centrifugal force and the air does not contain dust by the centrifugal force. However, due to the first centrifugation and airflow, friction noise with the vacuum cleaner case is generated, and the friction noise diffuses greatly from the dust container into the resonance sound, and a part of the resonance sound comes out again toward the suction oil flow part. Increases the overall noise level of the.

Dust bin noise reduction module 30 according to the present invention for reducing the noise of the dust container portion is connected to the connection pipe 42 and the dust container 46, the air sucked from the connection pipe 42 A suction inlet flow passage 32 for sucking air into the dust container 46 is formed, an air flow rotating plate 34 through which the air sucked in the suction flow passage 32 rotates, and an air flow rising plate for raising the sucked air toward the dust container ( 36 and the discharge passage 38 for discharging the filtered air to the handle 50 while passing through the dust filter grill 48 of the dust container 46 is formed.

As shown in FIG. 8A, the suction entry angle of the portion connecting the suction inlet flow path 32 and the airflow rotating plate 34 is 60 degrees or less.

In addition, the exhaust outlet passage 38 has a resonance chamber 39 formed therein, and a porous thin fiber or porous foam 39a is inserted into the resonance chamber 39 to prevent secondary ringing. .

Here, reference numeral 46a of the drawing is a dust container cover for connecting the dust container and the connection pipe.

As described above, the noise near the dust container 46 is friction noise and resonance sound. The air containing the dust entering the dust container 46 through the connecting pipe 42 after passing through the suction brush 40, the air entering along the suction port flow path 32 is a circular motion along the air flow rotating plate 34 And, as the rotation rises (cyclone) in the air flow rise plate 36 is entered into the dust container 46.

As described above, when the suction entry angle of the suction inlet flow passage 32 is sharply bent at 90 degrees, a large amount of friction noise is generated, and the airflow is changed to 180 degrees toward the dust container 46, affecting the flow velocity and the frictional force, thereby making noise. The dust box noise reduction module 30 according to the present invention is made of a thermoplastic resin sintered porous sound absorbing material having excellent sound absorption and sound insulation, and primarily reduces noise, while reducing the suction entry angle of the suction inlet flow path 32. When the friction noise generated when the air including the dust is sucked into the dust container 46 is formed at 60 degrees or less, the friction noise in the vicinity of the suction inlet passage 32 is reduced. Resonance of the sound is also reduced, and the backflow back to the suction flow path 32 is also reduced to reduce the noise of the dust container as a whole.

In addition, the discharge passage 38 is formed as a resonance chamber to maximize the noise reduction effect. That is, the dust box noise reduction module 30 minimizes the flow velocity and frictional resistance of the air containing the dust and at the same time absorbs and reduces the noise to exhibit the effect.

The connection tube 42 of the vacuum cleaner is in the form of a pipe and has a constant frictional force due to the rapid flow rate, and the noise is increased with the resonance sound of the dust box, in order to reduce the ringing noise of the connector 200. The connection pipe noise reduction module 26 is provided.

The connection pipe noise reduction module 26 is composed of a thermoplastic resin sintered porous sound absorbing material, has a pipe shape, and an air flow path is formed at the center thereof. And it is installed on the inner circumferential surface of the connection pipe 42 to reduce the ringing noise 200 of the connection pipe.

9A and 9B are noise measurement diagrams for measuring noise of a vacuum cleaner to which both a suction port, a connection pipe, and a dust box noise reduction module according to the present invention are applied, and FIGS. 10A and 10B are noise measurement diagrams of a conventional vacuum cleaner. Figures 9a and b showing the measured value of the average value is 72db, and Figures 10a and b showing the conventional measured value can be seen that the average value is 80.4db and the noise is reduced by about 8db, when the noise is reduced by about 3db typically Since the amount of noise that a person feels is reduced by half, it can be said that it is about 8 times quieter than a conventional vacuum cleaner, and thus the noise reduction effect of the vacuum cleaner noise reduction device according to the present invention is very large.

As described above, the noise reduction device for the vacuum cleaner according to the present invention has a structure capable of reducing the noise of the inlet portion as much as possible, and its material has abundant air gaps, which is a thermoplastic resin sintered porous sound absorbing material with good sound absorption to reduce noise. Excellent effect

The present invention is not limited to the above embodiments, and various changes can be made by any person having ordinary knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. It will be said that there is a technical spirit of the present invention to the extent.

Claims (8)

In the device for reducing the noise of the vacuum cleaner comprising a dust container installed in communication with the suction brush and the connecting pipe, A main body having an air inlet corresponding to the inlet of the suction brush made of thermoplastic resin sintered porous sound absorbing material is formed at the front end, an air outlet is formed at the rear end, and an air flow path through which the air sucked in the center is formed; An air inlet is formed in the center, and both ends are induction pipes installed in the rear portion of the main body and the inner side of the connecting pipe; inlet noise reduction module comprising a, It is made of a thermoplastic resin sintered porous sound absorbing material, the inlet flow passage for interconnecting the connecting pipe and the dust container, and sucks the air sucked from the connecting pipe into the dust container is formed, the air flow to rotate the air sucked in the suction channel And a dust box noise reduction module formed with a rotary plate and a discharge passage for discharging the foreign substances filtered through the dust container at the center of the air flow rotating plate to discharge the connection pipe to reduce noise generated from the suction brush and the dust container. A noise reduction device for a vacuum cleaner. In the device for reducing the noise of the vacuum cleaner comprising a dust container installed in communication with the suction port brush and the connecting pipe, It is made of a thermoplastic resin sintered porous sound absorbing material, the inlet flow passage for interconnecting the connecting pipe and the dust container, and sucks the air sucked from the connecting pipe into the dust container is formed, the air flow to rotate the air sucked in the suction channel And a dust box noise reduction module having a rotary plate and a discharge passage for discharging the filtered air to the connection pipe while passing through the dust container at the center of the air flow rotating plate to reduce noise generated from the dust container. Noise reduction device for vacuum cleaner. delete The method of claim 1, The thermoplastic resin sintered porous sound absorbing material made of a noise reduction device for a vacuum cleaner, characterized in that further comprising a pipe-shaped connection pipe noise reduction module installed inside the connection pipe. The method of claim 1, The induction pipe is a noise reduction device for a vacuum cleaner, characterized in that made of thermoplastic resin sintered porous sound absorbing material or soft rubber material. The method of claim 1, The front surface of the main body is formed of a double resonant chamber having an empty space therein is formed, the resonance chamber noise reduction device, characterized in that the porous fine fiber material or porous foam elastic material is inserted. The method according to claim 1 or 2, The discharge passage is formed of a double resonant chamber having an empty space portion is formed inside, the resonance chamber noise reduction device, characterized in that the porous fine fiber material or porous foam elastic material is inserted. The method according to any one of claims 1, 2 or 4, Noise reduction device for vacuum cleaner, characterized in that the sintering of the thermoplastic resin sintered porous sound absorbing material has a function of deodorizing, antibacterial, sterilization by mixing and sintering activated carbon, photocatalyst, silver nanopowder, zeolite.

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