KR20070078336A - Noise reduced vacuum cleaner - Google Patents

Abstract

A noise-reduced vacuum cleaner is provided to reduce noise generated during an operation of the cleaner remarkably and to facilitate individual production by forming a muffler for reducing noise in one kit. A noise-reduced vacuum cleaner includes a body, an exhaust hole, a muffler, a motor unit, and a dust collecting tank. The exhaust hole is installed at an outer surface of the body for exhausting air outside. The muffler is installed at the exhaust hole. The motor unit includes a fan at an inner front of the vacuum cleaner body. The dust collecting tank is installed at a rear of the motor unit in a rear of the body. The dust collecting tank separates dusts from the exterior air sucked into the cleaner by a cyclone method. The muffler includes two pipes(42) and an installing chamber(31). The pipe includes a plurality of holes at an outer peripheral surface, and at least one end thereof is opened.

Description

Noise reduction vacuum cleaner {NOISE REDUCED VACUUM CLEANER}

1 is a perspective view showing the appearance of a cyclone dust collecting vacuum cleaner.

Figure 2 is a perspective view of the rear of the vacuum cleaner of Figure 1;

Figure 3 is a side view of a vacuum cleaner equipped with a muffler according to the present invention.

Figure 4 is a perspective view of the external muffler according to the present invention.

5 is a cross-sectional view taken along the line AA of FIG.

Figure 6 is a cross-sectional view showing the internal structure of the external muffler according to an embodiment of the present invention.

Figure 7 is a cross-sectional view showing the internal structure of the external muffler according to another embodiment of the present invention.

8 is a schematic view showing the noise reduction effect of the external muffler according to the present invention.

*** Explanation of symbols for main parts of drawing ***

30: muffler 31: mounting chamber

32: Opening part 33: First chamber

34: second chamber 35: compartment wall

36: rear wall 37: bonding means

38: airtight packing member 42: first pipe

44: second pipe

The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner which reduces noise generated during a cleaner operation.

The vacuum cleaner generates a suction force by driving the fan, and collects foreign substances such as dust collected by the suction force in a dust bag or a dust collector mounted in the dust chamber. A vacuum cleaner having a dust collector separates dust and air by a cyclone method, and occupies most of the recent vacuum cleaning methods due to dust separation efficiency, ease of cleaning, and beauty in appearance. 1 and 2 illustrate a cyclone dust collecting vacuum cleaner.

The vacuum cleaner includes a main body 2 having a plurality of parts for collecting dust or foreign matter and a suction nozzle body 4 through which contaminated air containing dust or foreign matter is sucked from the outside of the main body 2; And an extension tube 6 installed at one end of the suction nozzle body 4 so as to be adjustable in length, and made of a flexible and elastic material for moving dust or foreign matter from the extension tube 6 to the main body 2. Connection hose 8;

Inside the main body 2, a fan motor (not shown) that is driven by an applied power source to generate a vacuum generates a suction force. In addition, the dust collecting container 20 for filtering the dust or foreign matter contained in the sucked air is detachably mounted in the storage space 12 behind the main body.

The rear lower portion of the main body 2 is equipped with a wheel 3 so that the main body 2 can be easily moved to a desired position.

Due to the suction force generated in the fan motor, the air introduced into the dust collecting container 20 is separated into air and foreign substances while forming a spiral flow inside the dust collecting container. At this time, the foreign matter having a relatively large mass is collected at the bottom of the dust collector by gravity, and the clean air filtered by the foreign matter is discharged to the outside through the exhaust port 5 formed on the side of the main body.

Such vacuum cleaners have continuously improved their ability to separate foreign substances such as air intake and dust according to the development of technology, but the noise problem generated while driving the cleaner remains a problem that cannot be solved. Motor noise, which accounts for a large part of the noise of the vacuum cleaner, includes magnetic noise, flow noise, and blade passage frequency (BPF) noise.

Among these, the BPF noise is very annoying to the user, and user complaints have been raised. In addition, the flow noise also contributes to the generation of noise.

Conventionally, a method of providing a motor chamber made of a sound absorbing material or the like to prevent noise generated from the motor unit or changing the structure of each flow path of the cleaner has been proposed, but effective noise reduction could not be achieved.

In particular, due to the limited spatial limitation of the vacuum cleaner, the noise reduction by the motor chamber is necessarily inversely related to the power, therefore, in order to lower the noise, the power must be sacrificed. Cannot be achieved.

In light of the recent trend of miniaturization of vacuum cleaners, the space occupied by the motor chamber is inevitably smaller, and thus the noise problem of the vacuum cleaner becomes more serious.

It is therefore an object of the present invention to provide an optimal means for solving the noise problem without expanding or changing the structural form of the cleaner.

In particular, it is an object of the present invention to provide a noise reduction means suitable for a small vacuum cleaner.

In addition, another object of the present invention is to provide a new means that can significantly reduce the noise without lowering the efficiency of the cleaner.

Other objects and features of the present invention will be more clearly shown in the following detailed description.

The present invention provides a noise reduction vacuum cleaner having a detachable external muffler.

The present invention proposes a muffler of a new structure to optimize the noise reduction of the vacuum cleaner, as well as suggests an external muffler structure that can be easily installed or detached from the vacuum cleaner to improve the assembly and replacement of the vacuum cleaner, and further use. Increase convenience.

The muffler is mounted on the outer surface of the exhaust port of the cleaner. The location of the exhaust port may vary according to the type of the vacuum cleaner, and may be mounted on the side or the rear of the cleaner, in some cases, the upper or the front.

3 illustrates a vacuum cleaner according to an embodiment of the present invention. It can be seen that the muffler 30 is attached to the exhaust port 5 provided on the outer surface of the main body 2 to discharge air to the outside. There is a motor unit (not shown) including a fan in the front of the cleaner body, and the dust collecting tube 20 is mounted to the rear of the motor unit. The dust collector separates foreign substances by the cyclone method from the outside air sucked into the cleaner.

The muffler 30 is fixed in close contact with the exhaust port 5, but is removable by applying an external force. In addition, it can be easily fixed to the exhaust port by applying an external force.

4 to 6 show in more detail an example of a vacuum cleaner equipped with a muffler 30 according to the present invention. The muffler consists of one or more, preferably at least two pipes 42, 44 and a mounting chamber 31 in which the pipes are embedded. The pipes 42 and 44 have a plurality of perforations 42 'and 44' formed on the outer circumferential surface thereof and have a structure in which at least one end thereof is open.

The mounting chamber includes a first chamber 33 coupled to an exhaust port of the cleaner, and a second chamber 34 in a sealed space. Two pipes 42 and 44 are embedded in the second chamber, one end of the first pipe 42 protrudes outward through the second chamber, and one end of the second pipe 44 is the first pipe. It protrudes toward the chamber 33. The first chamber 33 is coupled to the exhaust port 5 of the cleaner to form a sealed structure, and serves as a medium for moving the air discharged from the exhaust port to the second chamber 34 through the pipe 44. On the other hand, the second chamber 34 guides the flow of air to the outside through the two pipes, and serves to reduce the noise generated from the exhaust port in this process.

There is a partition wall 35 between the first chamber 33 and the second chamber 34, and the other end of the second chamber is disconnected from the outside by the rear wall 36. One end of the first pipe 42 contacts the partition wall 35 and the other end of the first pipe 42 protrudes outward through the rear wall 36 of the second chamber. On the other hand, one end of the second pipe 44 contacts the rear wall 36 of the second chamber, and the other end of the second pipe 44 penetrates through the partition wall 35 and protrudes into the first chamber.

The mounting chamber 31 also has a circular opening 32 on one side of the front first chamber 33 so as to be coupled to the exhaust port 5 of the cleaner. This opening may be modified depending on the shape of the exhaust port. The opening 32 is preferably formed larger than the exhaust port 5 so that the mounting chamber is disconnected from the outside.

A coupling portion 37, for example, a coupling ring or the like, may be formed at an inner circumference of the opening portion 32 so as to be coupled to the exhaust port 5. A similar form of coupling means may be formed on the exhaust port outer surface such that the engaging portion is fixed to the outer surface of the exhaust port by external force. For example, if the engaging portion 37 is a latch in the form of a protrusion, it is also possible to form a concave locking jaw at the corresponding position of the exhaust port.

In addition, a sealing packing member 38 may be attached to the inner circumference of the opening 32 to more reliably seal between the mounting chamber 31 and the exhaust port 5.

Mounting chamber 31 is preferably a cross-sectional structure is narrower than the height as shown in FIG. This flat shape is particularly advantageous when mounting the muffler on the outside of the cleaner, making the appearance simple and beautiful. However, the cross-sectional structure of the mounting chamber may be variously modified according to the position or shape of the cleaner exhaust port.

The external muffler according to the present invention includes a pipe having a plurality of perforations on its surface and having at least one open end, and a mounting portion that disconnects at least a portion of the pipe from the outside and engages with the exhaust port of the cleaner. The mounting portion is mounted to the exhaust port to form a closed space except for the air flow caused by the perforation of the pipe.

The muffler is preferably provided with two or more pipes with a plurality of perforations and at least one open end, but in some cases it may be provided with only one long pipe. It can also be configured in the form.

7 shows a muffler in a modified form. The illustrated muffler 30 'is very similar in internal structure to the embodiment of FIG. 6, but differs in the number of pipes. The second pipes 44a and 44b having a part of the tip protruding into the first chamber 33 and the first pipes 42a and 42b having a part protruding out of the second chamber 34 are alternately arranged. In this case, it can be seen that the muffler consisting of two pipes according to the embodiment of FIG. 6 is similar in form to a parallel connection. Unlike this parallel structure, a structural variant may be possible in which the second chamber is divided into two or more chambers and the pipe sets are connected in series.

An operation of reducing the noise generated by the muffler in the vacuum cleaner will be described with reference to FIG. 8.

When the muffler 30 is tightly fixed to the exhaust port 5 of the vacuum cleaner and then the cleaner is operated, the air discharged from the exhaust port and noise generated from the cleaner, that is, sound waves, are introduced into the first chamber 33 (a ). In this inflow process, there is little but expansion effect. Air and sound waves introduced into the first chamber are compressed by being introduced into the inside through one end of the second pipe 44 (b). Compressed air and sound waves (c) are introduced into the second chamber (34) through the perforations (44 ') on the outer peripheral surface passing through the second pipe (d). In this process, air and sound waves expand. Air and sound waves of the second chamber are introduced into the first pipe through the perforations 42 'on the outer circumferential surface of the first pipe 42 (e) and undergo compression. Air and sound waves passing through the first pipe 42 are finally discharged to the outside of the muffler (f) and expand.

This series of compression and expansion processes results in mechanical motion of sound waves, which in turn reduce sound as sound energy is converted into thermal energy.

The muffler may vary the types of sound waves that can be reduced according to the number of pipes embedded in the mounting chamber, the diameter or length of the pipes, the arrangement of the pipes, the number and diameter of perforations formed on the pipe surface, and the like. For example, a pipe with an optimized structure may be designed to reduce noise in a specific frequency band.

The present invention has been exemplarily described through the preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications and improvements may be made within the scope of the technical spirit of the following claims. For example, the external muffler according to the present invention can be applied to a large vacuum cleaner or a vacuum cleaner having a dust collecting bag instead of a dust collecting container by changing the structure.

According to the present invention, it is possible to significantly improve the noise generated during the operation of the vacuum cleaner. In particular, individual production is easy by making a muffler, a noise reduction means, into a unit. In addition, it is easy to replace the muffler to increase user convenience.

Claims (10)

A noise reduction vacuum cleaner having a removable external muffler mounted to the exhaust port of the cleaner. The noise reduction vacuum cleaner of claim 1, wherein the muffler is mounted on an outer surface of the cleaner. The noise reduction vacuum cleaner of claim 1, wherein the muffler includes a pipe having a plurality of perforations and at least one open end thereof, and a mounting portion that disconnects at least a portion of the pipe from the outside and engages with the exhaust port. The noise reduction vacuum cleaner according to claim 3, wherein the mounting portion forms a sealed space by being mounted to the exhaust port. 2. The muffler of claim 1, wherein the muffler comprises at least two pipes having a plurality of perforations and at least one open end, wherein at least one of the pipes has an open end facing the exhaust port and the open end of the other pipe Noise reduction vacuum cleaner, characterized in that facing outside. The noise reduction vacuum cleaner of claim 1, wherein the muffler comprises a first chamber coupled to an exhaust port of the cleaner, and a second chamber of a closed space. A cleaner body, a motor unit mounted inside the main body, a dust collecting tube mounted behind the motor unit, an exhaust port provided on an outer surface of the main body, and an external muffler mounted to be detachable from the exhaust port. Noise reduction vacuum cleaner. 8. The noise reduction vacuum cleaner of claim 7, wherein the muffler comprises a pipe having a plurality of perforations on the surface thereof and at least one end of which is open, and a mounting portion that disconnects at least a portion of the pipe from the outside and engages with the exhaust port. 8. The muffler of claim 7, wherein the muffler comprises two or more pipes with a plurality of perforations and at least one open end, wherein at least one of the pipes has an open end facing the exhaust port and the open end of the other pipe Noise reduction vacuum cleaner, characterized in that facing outside. The noise reduction vacuum cleaner of claim 7, wherein the muffler comprises a first chamber coupled to an exhaust port of the cleaner, and a second chamber of a closed space.

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