KR930008363B1 - Device for low noise of vacuum cleaner - Google Patents

Abstract

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Description

Low noise vacuum cleaner

1 is a sectional front view of a main portion of a conventional vacuum cleaner.

2 is a cross-sectional view showing one embodiment of a conventional low noise vacuum cleaner.

3 is a structural diagram showing another embodiment of a conventional low noise vacuum cleaner.

4 is a cross-sectional view showing the dustproof structure of the electric blower in the low noise vacuum cleaner of FIG.

5 is a sectional front view of the main portion of the vacuum cleaner of the present invention.

6 is a sectional front view of the main portion of the vacuum cleaner of the present invention in a state where the upper body is separated.

7 is a cross-sectional view showing another embodiment of the electric blower box of the vacuum cleaner of the present invention.

8 is a front view of an intake groove hole formed in the dividing wall of the embodiment of the present invention.

Figure 9a is a diagram showing the magnitude of the noise measured on the back of the conventional vacuum cleaner according to the frequency of the motor.

Figure 9b is a diagram showing the magnitude of the noise measured on the back of the vacuum cleaner of the present invention according to the frequency of the motor.

Figure 10a is a diagram showing the magnitude of the noise measured on the upper surface of the conventional vacuum cleaner according to the frequency of the motor.

Figure 10b is a diagram showing the magnitude of the noise measured on the upper surface of the vacuum cleaner of the present invention according to the frequency of the motor.

Figure 11a is a diagram showing the magnitude of the noise measured on the side of the conventional vacuum cleaner according to the frequency of the motor.

Figure 11b is a diagram showing the magnitude of the noise measured on the side of the vacuum cleaner of the present invention according to the frequency of the motor.

* Explanation of symbols for main parts of the drawings

1: body 2: dust collecting chamber

3: electric blower storage room 4: suction pipe

5: paper filter 6: electric blower

7: separating wall 8: intake hole

9: electric blower box storage 10: main body

10-1: upper body 10-2: lower body

11 gasket 12 ribs

13: electric blower box 14: blower box intermediate buffer

15: blower box rear shock absorber 16: buffer storage unit

17: sound absorbing material 18: exhaust port

19: filter 20: electric blower

21: cylindrical box 22: seal ring

23: suction port 24: exhaust hole

25: blower front cushion material 26: blower rear buffer material

27: buffer storing part 28: convex part

29: steel plate 30: sound absorbing material

31: filter 32: noise absorption layer

33,34 ring 35 sound absorbing material

36: filter 37: blower box full buffer material

38: intake groove slot 39: cylindrical space

40: cylindrical wall

[Field of Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner for cleaning floors or carpets of a home or office by sucking dust, small stones and garbage by suction force of vacuum, and more particularly, to a low noise vacuum cleaner which greatly reduces noise.

[Background of invention]

Recently, due to the improvement of living standards, the vacuum cleaner using strong suction force by vacuum by removing from the conventional cleaning method using a broom or mop when cleaning dust, small stones, paper scraps, etc. accumulated on the floor in home or office. It is a well-known fact that the use case is greatly increasing. However, because the noise generated instead of the convenience of the vacuum cleaner is very large, the inside of the home or office was very noisy during cleaning using the vacuum cleaner, which was not good in many ways.

In other words, there are various inconveniences in the home, such as the noise of the vacuum cleaner, the sound of the radio or TV, the disturbance of students studying, the sleeping person wakes up, the unpleasant people in the house.

In addition, in the office, you can not talk to the person next to you, so you can not only do other tasks while using the vacuum cleaner, but also give a great unpleasant feeling to the people in the office. It was disturbed.

The reason why the conventional vacuum cleaner is loud as described above is that the configuration of the vacuum cleaner is shown in FIG. 1, so that the noise generated from the electric blower whose noise is the epicenter is primarily shielded by the main body. Noise is transmitted to the outside through the main body, and some noise is transmitted to the outside without any obstacle through the grille, which is an exhaust port, and to the outside through the intake hole drilled in the separation wall of the dust collecting chamber and the electric blower storage chamber. Because it becomes.

In addition, the vibration is generated when the electric blower is operating, but because the vibration absorbing means for absorbing the vibration is not generated because the noise generated by the vibration.

A low noise vacuum cleaner (Japanese Patent Application Laid-Open No. 3-65540) of the prior art is shown in FIG. The low noise vacuum cleaner installs the electric blower in the electric blower box, and also guides the air flow exhausted from the electric blower to the side of the vacuum cleaner main body and passes through a silent passage formed separately between the vacuum cleaner body and the wheels. To reduce the noise by exhausting to the atmosphere. However, the low noise vacuum cleaner simply tried to reduce the noise by storing the electric blower in the electric blower box. However, the side of the electric blower box was opened so that the noise blocking effect was remarkably low. There is a disadvantage to be newly produced.

Another prior art low noise vacuum cleaner (Japanese Laid-Open Utility Model Publication No. 52-135361) is shown in FIGS. 3 and 4.

In the low noise vacuum cleaner, the motor for the electric blower is fixed to the inside of the vacuum cleaner, and the anti-vibration rubber is inserted into the part where the armature part of the motor is in direct contact with each other. However, the insertion of the anti-vibration rubber as described above is simply to prevent the vibration of the motor to be transmitted to the cleaner body, and also the cylindrical silencer is simply adjacent to the electric blower to simply bend the flow path two or three times to reduce the noise. Not only did the effect not appear significantly, but in order to install such a cylindrical silencer, the size of the cleaner body had to be larger than the conventional cleaner.

As described above, since the conventional vacuum cleaners are inconvenient to use because of their high noise, users are eager to develop a vacuum cleaner with low noise.

However, since the vacuum cleaner must generate a strong suction force to suck dust, it was recognized that it was impossible to reduce the noise because it had to use an electric blower that had a high rotational speed and a lot of noise.

The present invention was created in order to break the recognition previously considered impossible to provide users with a low noise vacuum cleaner with low noise so that it can be cleaned in a comfortable atmosphere.

[Purpose of invention]

The purpose of the present invention is to solve the problems of the conventional vacuum cleaner, unlike the electric blower box with the side open simply without affecting the cleaning ability, that is, no performance at all, a cylindrical box between the electric blower and the electric blower box. By inserting the noise shielding and extinguishing means, and also to make the exhaust passage longer by bending longer without changing the size and shape of the cleaner body to provide a vacuum cleaner greatly reduced the noise.

Another object of the present invention is to provide a vacuum cleaner having a vibration absorbing means to suppress the noise caused by vibration in order to suppress the noise generated by the vibration of the electric blower.

[Summary of invention]

In order to achieve the above object, the vacuum cleaner of the present invention is built in an electric blower box in which an electric blower, which is the epicenter of noise, is formed with one inlet for air suction on the front wall, and one or more exhaust holes are formed on the rear wall. The cylindrical case with the front opening is installed around the electric motor part of the electric blower in the electric blower box, and the rear part of the electric blower box is housed in the electric blower box storing part which is configured inside the main body. The exhaust port discharged to the outside of the vacuum cleaner is characterized in that formed on the bottom wall of the electric blower box storage portion, that is, the lower body of the vacuum cleaner.

The vacuum cleaner of the present invention is also provided with a blower front buffer and a blower rear buffer at the contact portion between the electric blower and the electric blower box in order to suppress noise generated by vibration of the electric blower, and a cylindrical box is provided on the blower rear buffer. It is installed by two rings made of elastic material in the middle of the blower box, and the middle of the blower box and the back of the blower box are installed at the contact area between the electric blower box and the electric blower box storage part. The blower box front buffer material is installed between the cylindrical walls which are the contact parts.

[Description of Specific Example of the Invention]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In general, as shown in FIG. 1, the vacuum cleaner has a dust collecting chamber 2 and an electric blower storage chamber 3 separated from the inside of the main body 1, and the dust collecting chamber 2 has a suction pipe which is an air suction passage. 4, even if a paper filter 5 for filtering dust contained in the air sucked through is installed, an exhaust vent part is formed in the electric blower storage chamber 3, and a vacuum cleaner 6 is housed. The separating wall 7 separating the dust collecting chamber 2 and the electric blower storage chamber 3 has a plurality of intake holes 8 to allow air to flow between the dust collecting chamber 2 and the electric blower storage chamber 3. Pierced

The vacuum cleaner of the present invention, as can be seen in Figure 2 and Figure 3 is formed in the electric blower storage chamber 3, the electric blower box storage unit 9 composed of the upper and lower, the upper electric blower box storage 9-1 is integrally formed with the upper body 10-1 of the vacuum cleaner, and the lower electric blower case storage unit 9-2 is integrally formed with the lower body 10-2. A gasket 11 having elasticity is fitted in the mutually contacting portions of the lower electric blower box storage portions 9-1 and 9-2.

On the inner surface of the vertical wall of the electric blower box storage section 9, longitudinal longitudinal ribs 12 are formed at regular intervals for noise shielding, as shown in FIG. An opening for installing the electric blower box 13 is formed in the front wall of the electric blower box storage unit 9, and the air blower box 13 maintains airtightness between the opening edge of the front wall and the electric blower box 13. Blower box middle buffer 14 is installed to prevent vibration of the fan. In the center of the rear wall inner surface of the electric blower box storage unit 9, a blower box rear buffer material 15 is provided, and a shock absorber storage unit 16 for supporting the back of the electric blower box is formed.

A sound absorbing material 17 made of a felt cloth for absorbing noise is attached to the entire inner surface of the electric blower box storage part 9 except for the exhaust port part. An exhaust port 18 is formed at the front of the bottom surface of the electric blower box storage unit 9 for finally exhausting the exhaust. The inner surface of the exhaust port 18 has a resistance to exhaust flow while filtering noise absorption and dust. A filter 19 made of sponge or the like, which is not greatly given, is attached.

The length between the front wall and the rear wall of the electric blower box storage section 9 is such that the front wall is disposed at a position corresponding to the tip of the electric motor section of the electric blower 20. The electric blower 20 and the cylindrical box 21 are built in, and the electric blower box 13 whose rear part is accommodated in the above-mentioned electric blower box storage part 9 is substantially cylindrical and consists of a front box and a rear box. The sealing ring 22 is inserted into the contact portion for airtightness and noise prevention.

In the center of the front wall of the electric blower box 13, one suction port 23 for air suction into the electric blower 20 is formed, and a plurality of drain holes 24 are formed in the rear wall so as to be disposed in an annular shape.

The inlet 23 and the exhaust hole 24 of the electric blower box 13 have edges at the inlet side as shown in FIGS. 2 and 3 to smooth the flow of air passing through the holes. It is curved. The front wall of the electric blower box 13 has a shape capable of accommodating the front blower 25 of the blower, and in the center of the rear wall of the rear side of the electric blower box 13, the blower rear buffer 26 is stored. A cushioning material storage portion 27 is formed, and a convex portion 28 for engaging with the blower box rear buffer 15 is formed in the center of the outer surface.

Electric blower box 13 is made of a plastic material, the rear box has a steel plate 29 is attached to the inner surface to amplify the noise shielding effect. Steel plate 29 may be inserted into the rear box during plastic injection as shown in FIG.

The sound absorbing material 30 for noise shielding and absorption is attached to the inner wall of the rear box of the electric blower box 13, and the filter 31 is attached to the inner surface of the rear wall. The configuration in which the electric blower 20 is installed in the electric blower box 13 includes a blower front buffer material 25 on the front surface of the electric blower 20 so that the electric blower 20 does not directly contact the electric blower box 13. To the rear, assembling the blower rear shock absorber 26, respectively, so that the blower front shock absorber 25 is engaged with the front portion of the electric blower box 13, the blower rear shock absorber 26 is the rear of the electric blower box 13 The electric blower 20 is installed in the electric blower box 30 by inserting the shock absorbing material storage part 27 and combining the front box and the rear box of the electric blower box 13.

The front surface of the blower front cushioning material 25 assembled to the front of the electric blower 20 has a shape that can absorb noise most effectively to form an air layer for absorbing noise between the front wall of the electric blower box 13. The noise absorbing layer 32 is formed.

Around the electric motor part of the electric blower 20, the cylindrical box 21 which opened the front side is comprised in order to shield the noise which arose from the electric motor part, to bend and lengthen an exhaust flow path.

The cylindrical box 21 has an opening through which the blower rear buffer material 26 can be inserted in the center of the rear wall, and the cylindrical box 21 is blown by two rings 33 and 34 made of elastic material. It is firmly supported on the rear buffer 26. The length of the cylindrical box 21 is limited so that the cylindrical box 21 surrounds the electric motor part of the electric blower 20 to the maximum, and the front of the cylindrical box and the wing box of the electric blower 20 are separated by a predetermined interval.

The inner diameter of the cylindrical box 21 is larger than the outer diameter of the electric motor part of the electric blower, the outer diameter is smaller than the inner diameter of the cylindrical wall of the electric blower box, and the exhaust hole 24 of the electric blower box 13 to bend the flow path of the exhaust fan. It is larger than the diameter of the circle connecting the center of the. The inner surface of the cylindrical box 21 is attached with a sound absorbing material 35 for the sound absorption and shielding.

The periphery of the electric motor of the electric blower 20 is fitted with a filter 36 through which the exhaust gas passes without great resistance, but absorbs noise to some extent and filters dust. The main body of the vacuum cleaner has a separating wall 37 for separating the dust collecting chamber 2 and the electric blower storing chamber 3, and the air sucked through the suction pipe 4 is provided on the rear wall of the separating wall 37. After passing through the paper filter 5, a plurality of intake groove holes 38 are formed to be introduced into the electric blower 20.

As shown in FIG. 5, the intake groove hole 38 is radially located at a position radially deviated from the inlet 23 of the electric blower box 13. Since the cylindrical wall 39 is formed between the rear wall of the separating wall 37 of the main body and the front side of the electric blower box 13 by a predetermined interval, the air sucked through the intake groove hole 38 The inlet 23 of the electric blower box 13 flows in flexibly without great resistance. In addition, between the cylindrical wall 40 constituting the cylindrical space 39 and the front surface of the electric blower box 13, a blower box front buffer material 37 is inserted for maintaining airtightness and preventing vibration noise.

The low noise vacuum cleaner of the present invention works as follows.

When the electric blower 20 operates, most of the dust and rubbish contained in the air sucked through the suction pipe 4 are filtered by the paper filter 5 in the dust collecting chamber 2, and clean air is separated from the separating wall 7 It enters into the cylindrical space 39 through the intake groove hole 38 of) and enters into the electric blower 20 through the inlet 23 of the electric blower box.

Exhaust exhausted through the side of the electric blower 20 passes through the filter 36 wrapped around the electric motor part of the electric blower 20 so that the flow direction is 90 to the front of the vacuum cleaner by the cylindrical box 21. It is bent at ° and flows.

The exhaust is bent into a U-shape while exiting the front edge of the cylindrical box 21 to flow between the outer surface of the cylindrical box 21 and the inner surface of the electric blower box 13. The exhaust is bent in the S-shape at the outer rear edge of the cylindrical box 21 and passes through the filter 31 attached to the inner surface of the rear wall of the electric blower box 13 to discharge the exhaust hole 24 of the electric blower box 13. Exit through the electric blower box (13) through.

Exhaust exhausted from the electric blower box 13 is again bent 90 ° outward from the center line of the vacuum cleaner by the electric blower storage unit 9 so that the outer surface of the electric blower box 13 and the electric blower box storage unit 9 The filter (19) attached to the inner surface of the exhaust port 18 formed on the front lower surface of the electric blower box storage section 9, that is, the lower surface of the main body, is bent 90 ° toward the front of the vacuum cleaner while flowing between the inner surfaces. ) And is discharged to the outside of the vacuum cleaner through the exhaust port (18).

The noise generated by the electric blower 20 includes the filter 36 wrapped around the electric motor part of the electric blower 20, the cylindrical box 21, the sound absorbing material 35 attached to the inner surface thereof, the electric blower box 13, and the like. The sound absorbing material 30 or filter 31 attached to the inner surface thereof, the electric blower box storage portion 9 and the sound absorbing material 17 attached to the inner surface thereof, and the main body are shielded several times. Noise is not transmitted.

In addition, since the exhaust passage is curved several times and the sound absorbing material and filter are formed on the exhaust passage, the noise flowing out along the exhaust passage is mostly eliminated and almost no noise is transmitted to the outside of the vacuum cleaner.

In particular, since the longitudinal long frame 12 is formed on the inner surface of the vertical wall of the electric blower box storage unit 9, noise is blown out through the exhaust passage and hits or reflects on the inner surface of the electric blower box storage unit 9. Most of the time it is shielded and extinguished by the skeleton (12).

On the other hand, the noise flowing out through the intake port 23 of the electric blower box 13 is not so large because it comes out of the air flow, but the intake groove is formed on the water surface of the partition wall 7 at the position corresponding to the intake port 23. Since the hole 38 is not formed and is shielded, the noise is shielded by the separating wall 7.

Therefore, the noise generated by the electric blower 20 is mostly shielded or extinguished, thereby greatly reducing the noise transmitted to the outside of the main body.

In addition, the low noise vacuum cleaner of the present invention is inserted between the electric blower 20 and the electric blower box 13 in order to prevent the generation of noise caused by vibration blower front shock absorber 25 and the blower rear shock absorber 26 is electric The blower 29 and the electric blower box 13 are not in direct contact with each other.

In addition, since the cylindrical box 21 is supported by two elastic rings (33, 34) on the blower rear buffer member 25 fitted to the rear of the electric blower 20, the cylindrical box 21 and the electric box Noise between vibrations is not generated between the blowers 20 and between the cylindrical box 21 and the electric blower box 13.

Also, in the case where the electric blower box 13 is installed in the electric blower box storage unit 9, the convex part 28 formed in the center of the outer surface of the rear wall of the electric blower box 13 and the electric blower box storage unit 9 The blower box rear buffer material 15 is inserted between the cushioning material storage portions 16 formed in the center of the inner surface of the face wall, and the outer side of the cylindrical wall of the electric blower box 13 and the inside of the front wall of the electric blower box storage portion 9. Between the edges of the blower box middle buffer material 14 is inserted so that the electric blower box 13 does not directly contact the electric blower box storage 9, and the front and cylindrical space of the electric blower box 13 An elastic blower box front buffer material 37 is also provided between the cylindrical walls 40 of 39 so that the electric blower box 13 and the cylindrical wall 40 of the cylindrical space 39 do not directly contact each other.

Therefore, even if the vibration occurs due to the operation of the electric blower 20, the vibration is the front blower 25, the blower rear buffer 26, the blower box intermediate buffer 14 and the blower box rear buffer (15), and the blower Absorbed by the front shock absorber 37, no vibration sound occurs.

In order to compare the noise generated by the conventional vacuum cleaner and the vacuum cleaner of the present invention, the results measured under the same conditions at three different locations are shown in the following table. Shown in

Fig. 6a shows the magnitude of the noise measured at the rear of the vacuum cleaner, and Fig. 6b shows the magnitude of the noise measured at the rear of the vacuum cleaner according to the present invention, respectively, according to the frequency of the motor. The magnitude of the noise measured on the upper surface of the vacuum cleaner, 7b is shown in the bar diagram according to the frequency of the motor, respectively the magnitude of the noise measured on the upper surface of the vacuum cleaner of the present invention, Figure 8a is a conventional vacuum cleaner Figure 8b shows the magnitude of the noise measured in terms of, and the magnitude of the noise measured in the aspect of the vacuum cleaner of the present invention is shown in a bar chart according to the frequency of the motor, respectively.

As can be seen from the table and FIGS. 6 to 8, the vacuum cleaner of the present invention reduced noise by about 17.7 to 22.7 dB at each position of the vacuum cleaner of the prior art.

Typically, the noise reduction of 3dB makes the user feel the noise reduction effect of 1/2 by hearing the general public, so the vacuum cleaner of the present invention exhibits the noise reduction effect of 1/60 to 1/190 than the vacuum cleaner of the prior art. Since the low noise vacuum cleaner of the present invention greatly suppresses the occurrence of noise as described above, it exhibits the effect of cleaning while maintaining a pleasant atmosphere.

[table]

On the other hand, since the vacuum cleaner of the present invention has an exhaust port portion for finally discharging the exhaust to the outside of the vacuum cleaner, the exhaust port portion for discharging due to the heat of the exhaust is configured in the lower body of the vacuum cleaner. It also has a sterilizing function to kill.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the invention, and such variations and modifications are within the scope of the appended claims. .

Claims (5)

The dust collecting chamber where the paper filter is installed and the electric blower storage chamber where the electric blower is installed are composed in the main body, the electric blower has an inlet for air suction on the front wall, and one or more exhaust holes are formed in the annular shape on the rear wall. In the vacuum cleaner built in the electric blower box, the rear part of the electric blower box is housed in the electric blower box storage unit which is configured inside the main body, and the exhaust port which finally discharges the exhaust to the outside of the vacuum cleaner is A low noise vacuum cleaner comprising a bottom wall of an electric blower box storage section. 2. The air blower according to claim 1, wherein the front face is open, the front face is open, the length of the front face and the wing of the electric blower between the periphery of the electric blower of the electric blower and the electric blower box to shield noise and to bend and lengthen the exhaust passage. Between the boxes is limited so that the maximum amount of air blown out of the electric blower is discharged by a minimum interval, the inner diameter is larger than the outer diameter of the electric motor of the electric blower, the outer diameter is smaller than the inner diameter of the circumferential wall of the electric blower box, the exhaust of the electric blower box A cylindrical box that is larger than the diameter of the circle connecting the center of the ball, and has an opening for inserting the blower rear buffer in the center of the rear wall and is firmly supported on the blower rear buffer by two rings made of elastic material. Low noise vacuum cleaner, characterized in that is installed. The low noise vacuum cleaner according to claim 1, wherein the electric blower box has a steel plate formed on its inner surface or inside thereof. 2. The low noise vacuum cleaner as claimed in claim 1, wherein a filter is provided around an electric motor portion of the electric blower, an inner surface of the rear wall of the electric blower box, and an inner surface of the exhaust port portion formed on the bottom wall of the electric blower box storage portion. The low noise vacuum cleaner according to claim 2, wherein a sound absorbing material is attached to the inner surface of the cylindrical shape.