JP2006158783A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner for effectively reducing the operation sound of an electric blower, which is emitted to the outer part of a main body housing, without blocking the flow of discharge air and providing a quiet operation without deteriorating dust suction performance. <P>SOLUTION: The discharge air from the electric blower 2 which is supported inside the main body housing 1 is discharged to the outer part through discharge holes 17, 17... opened on the peripheral wall of the main body housing 1 in the vacuum cleaner. A sound insulation cylinder 3 is fitted to the outer periphery of a fan cover 20 in the electric blower 2. The outlet of the discharge air arranged in the fan cover 20 and the outer side of an electric motor 21 for driving are blocked from the discharge holes 17, 17, ..., so as to prevent the arrival of the operation sound to the discharge holes 17, 17..., which is emitted from the outlet and the electric motor 21. Thus, the sound emission to the outer part of the main body housing 1 is reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner in which an electric blower for sucking dust is supported inside a main body housing, and more specifically, an operation sound of the electric blower is discharged to the outside from an exhaust port provided in the main body housing. The present invention relates to a vacuum cleaner having a soundproof structure for preventing this.

  Vacuum cleaners that are popular in many households are configured to suck in dust using the negative pressure generated on the intake side of an electric blower and collect it in a dust collection chamber located in the middle of the intake passage. Yes. The electric blower is configured to be compact by integrally connecting an electric motor for driving to one side of a fan cover incorporating an impeller, and is supported inside a main body housing provided with a dust collecting chamber on one side. ing.

  The dust collection chamber includes an intake port that opens to the outside of the main body housing, and the intake port is connected to a dust collection nozzle via an intake hose or an intake pipe. The electric blower installation chamber also serves as an exhaust chamber for receiving the exhaust of the electric blower, and is communicated to the outside through one or a plurality of exhaust holes provided at corresponding positions of the main body housing.

  The vacuum cleaner configured as described above is used by driving an electric blower and sliding the dust collecting nozzle against a cleaning surface such as a floor surface or a wall surface. At this time, the dust on the cleaning surface is sucked into the dust collecting chamber through the intake hose or the intake pipe to be captured and collected, and only the air separated from the dust is sucked into the electric blower and passes through the exhaust chamber to the main body. It is exhausted outside the housing.

During use of such a vacuum cleaner, there is a problem that vibration and sound are generated with the operation of the electric blower. For vibration, for example, an elastic material such as rubber wound around the outer periphery of the fan cover An anti-vibration structure that supports the electric blower via a support ring made of steel and prevents the propagation of vibration to the main body housing is adopted. Adopting a sound-absorbing structure that prevents breathing of sound-absorbing material, such as urethane foam, to the sound source, such as the discharge outlet of the product, and prevents it from being discharged to the outside through the exhaust holes established in the main body housing (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 11-225918

  However, in the conventional soundproof structure as described above, a good soundproofing effect can be obtained and a quiet operation is possible. On the other hand, the sound absorbing material arranged as described above obstructs the flow of exhaust and provides resistance. The driving load of the electric blower increases, and there is a problem that the electric blower and the main body housing are increased in size and weight.

  This difficulty, as described in the Patent Document 1, the main body housing is provided with a large-diameter wheel for movement, and the electric vacuum cleaner configured to be able to move on the cleaning surface by rotation of the wheel, Although it is not a big problem with a so-called caster type vacuum cleaner, a dust collecting nozzle is connected to one side of the main body housing via an intake pipe or directly, and also to the other side via a support rod or In a small vacuum cleaner that is configured such that a handle is directly connected, and the main body housing is pushed and pulled while holding the handle, the operability is reduced due to the increase in weight of the main body housing. Invite the problem of getting worse.

  Under such circumstances, in conventional small vacuum cleaners, soundproofing structures are often omitted with an emphasis on obtaining satisfactory dust absorption performance while ensuring good usability, and larger casters. The current driving noise is louder than the type of vacuum cleaner.

  The present invention has been made in view of such circumstances, and has a soundproof structure that can effectively reduce the operation sound of the electric blower released to the outside of the main body housing without hindering the flow of exhaust, An object of the present invention is to provide an electric vacuum cleaner capable of quiet operation.

  Another object of the present invention is to enable the above soundproof structure to be realized with a simple configuration.

  The vacuum cleaner according to the present invention is a vacuum cleaner configured to discharge the exhaust from the electric blower for dust absorption supported inside the main body housing to the outside through an exhaust hole opened in the main body housing. One side is fitted to the outer periphery of the fan cover of the electric blower, and a sound insulation cylinder is provided to block between the exhaust outlet and the outside of the motor for driving the electric blower and the exhaust hole. .

  In the present invention, the sound insulation cylinder fitted on one side to the fan cover of the electric blower blocks the discharge port of the electric blower and the drive motor from the exhaust hole opened in the main body housing, In addition, the operation sound generated from the electric motor is prevented from reaching the exhaust hole directly, and the sound emitted to the outside of the main body housing is reduced without obstructing the flow of exhaust.

  The vacuum cleaner according to the present invention is characterized in that the sound insulation cylinder is integrally formed with a support ring for elastically supporting the fan cover inside the main body housing.

  In this invention, the sound insulation cylinder is integrally formed with the support ring of the fan cover, and the configuration is simplified by reducing the number of parts.

  Further, the electric vacuum cleaner according to the present invention is characterized in that the sound insulating cylinder has a diameter reduced in a tapered shape toward a downstream side in the exhaust flow direction.

  In the present invention, the flow of the exhaust gas inside the sound insulation cylinder is a tapered flow that provides a stable flow form, and the effect of reducing the operating noise during this period is enhanced.

  The vacuum cleaner according to the present invention further includes a sound absorbing material that is attached to the inner surface of the sound insulation cylinder so as to have a thickness that does not impede the flow of the exhaust, and further includes the vacuum cleaner according to the present invention. The machine includes a sound absorbing material that is attached to the inner surface of the main body housing facing the opening end of the sound insulation cylinder so as to have a thickness that does not impede the flow of the exhaust.

  In this invention, a sound absorbing material is applied to one or both of the inner surface of the sound insulating cylinder and the inner surface of the main body housing facing the opening end of the sound insulating cylinder, and the flow of the exhaust is brought into contact with the sound absorbing material to inhibit this flow. Absorbs the operation sound without improving the soundproofing effect.

  In the vacuum cleaner according to the present invention, the sound insulation cylinder fitted to the fan cover covers the discharge port of the electric blower and the outside of the electric motor, so that the body housing of the operation sound emitted from the discharge port and the electric motor is provided. Direct access to the established exhaust holes is prevented, and emission of operating noise can be effectively reduced without hindering the flow of exhaust, and quiet operation is possible without deteriorating the dust absorption performance. Become.

  In addition, since the sound insulation tube is integrally formed with the support ring for elastically supporting the fan cover inside the main body housing, a good sound insulation effect can be obtained without requiring dedicated parts, and the configuration can be simplified. .

  Further, since the sound insulation cylinder is a cylinder whose diameter is reduced in the flow direction of the exhaust gas, the flow of the exhaust gas is stabilized, the effect of reducing the operating noise during this time is enhanced, and a more effective sound insulation effect can be obtained.

  Furthermore, since the sound absorbing material is attached to one or both of the inner surface of the sound insulating cylinder and the inner surface of the main body housing facing the opening end of the sound insulating cylinder, the operation sound is absorbed by these sound absorbing materials, and the release to the outside becomes more effective. Since the thickness of the sound absorbing material can be prevented and the thickness of the sound absorbing material does not hinder the flow of exhaust gas, there is no possibility of deteriorating the dust absorption performance. .

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is an external perspective view of a vacuum cleaner according to the present invention. The vacuum cleaner shown in this figure is similar to an intake pipe 10 connected to one side of a main body housing 1 containing an electric blower 2 and the like. On the side, a support rod 11 connected to the intake pipe 10 so as to be substantially coaxial is provided.

  A dust collection nozzle 12 is attached to the other end of the intake pipe 10 so as to be able to swing within a predetermined angular range around an axis substantially orthogonal to the intake pipe 10, and an appropriate bend is attached to the other end of the support rod 11. A handle 13 is provided at an angle, and the illustrated vacuum cleaner rolls a moving wheel (not shown) provided on the dust collection nozzle 12 to the cleaning surface, The main body housing 1 is supported in the vertical position with the intake pipe 10 as a support, the handle 13 is gripped and a pushing / pulling force is applied through the support rod 11, and the dust suction nozzle 12 is placed on the cleaning surface with the rolling of the wheel. It is comprised as a vertical type vacuum cleaner used to move and to suck and collect dust in the moving area.

  FIG. 2 is a cross-sectional view showing an internal configuration of a main part of the main body housing 1. As shown in the figure, the inside of the main body housing 1 is divided into a plurality of chambers arranged from the connection side of the intake pipe 10 toward the connection side of the support rod 11.

  The dust collection chamber 14 shown on the left side of FIG. 2 occupies substantially half of the main body housing 1 on the connection side of the intake pipe 10 and is covered with a cover plate 15 so as to be opened and closed as shown in FIG. . On the other side of the dust collection chamber 14, an exhaust chamber 16 is provided in parallel, and the electric blower 2 is supported inside the exhaust chamber 16. A plurality of exhaust holes 17, 17... Penetrating inward and outward are formed in the peripheral wall of the exhaust chamber 16.

  The electric blower 2 has a driving electric motor 21 integrally assembled on one side of a fan cover 20 containing an impeller (not shown), and rotates the electric impeller by rotation of the electric motor 21. And is fitted and supported inside the exhaust chamber 16 via a support ring 22 made of an elastic material wound around the outer periphery of the fan cover 20.

  On one side of the support ring 22, a sound insulation cylinder 3 extending toward the mounting side of the electric motor 21 is integrally provided. FIG. 3 is an external perspective view of the sound insulation cylinder 3. The sound insulation cylinder 3 shown in the figure is reduced in diameter from the side connected to the support ring 22 having an inner diameter A that can be fitted to the fan cover 20 to the other side having an inner diameter B smaller than this. As shown in FIG. 2, the outside of the electric motor 21 is attached so as to cover the entire length with an appropriate interval.

  FIG. 4 is an external perspective view showing another embodiment of the sound insulation cylinder 3. The sound insulation cylinder 3 shown in the figure is configured separately from the support ring 22 and is directed from one side having an inner diameter A that can be fitted to the outer periphery of the fan cover 20 to the other side having an inner diameter B smaller than this. And has a cylindrical shape with a reduced diameter. Such a sound insulation cylinder 3 is attached so that the one side is externally fitted to the fan cover 20 and is continuous with the support ring 22.

  On the other side of the fan cover 20 (on the side opposite to the electric motor 21), a suction nozzle 23 that is reduced in diameter toward the tip is projected coaxially, and the suction of the electric blower 2 that opens at the tip of the suction nozzle 23 The opening faces the inside of the dust collecting chamber 14 through a through hole in the center of the partition wall 18 between the exhaust chamber 16 and the exhaust chamber 16. The discharge port of the electric blower 2 is opened on the surface of the fan cover 20 on the mounting side of the electric motor 21 so as to surround the outside of the electric motor 21.

  In the electric vacuum cleaner according to the present invention configured as described above, as described above, when the electric motor 21 is rotationally driven with the dust collection nozzle 12 applied to the cleaning surface, the impeller rotates inside the fan cover 20. As shown by white arrows in FIG. 2, the air inside the dust collection chamber 14 is sucked through the suction nozzle 23.

  The dust collection chamber 14 communicates with the dust collection nozzle 12 through the intake pipe 10, and negative pressure is generated inside the dust collection nozzle 12 pressed against the cleaning surface by the intake air described above, and dust on the cleaning surface is generated. Is sucked into the dust collection chamber 14 together with the intake air through the dust collection nozzle 12 and the intake pipe 10, and directly into the dust collection chamber 14 or in a dust collection bag (not shown) attached to the inside of the dust collection chamber 14. It is collected. The dust collected in this way is taken out by opening the cover plate 15.

  By such collection, the suction nozzle 23 opened in the dust collecting chamber 14 is sucked only with air from which dust has been removed, and passes through the discharge port opened as described above on the other side of the fan cover 20, As indicated by arrows in FIG. 2, the air is exhausted along the outer periphery of the electric motor 21. Reference numeral 19 in FIG. 2 denotes a filter that captures fine dust remaining during intake to the suction nozzle 23 and is attached to the partition wall 18 as necessary so as to cover the opening of the suction nozzle 23. A part of the intake air to the fan cover 20 is used for internal cooling of the electric motor 21 and is exhausted from an exhaust port 24 opened on the outer surface of the electric motor 21.

  In the electric vacuum cleaner according to the present invention, the discharge side of the electric blower 2 that is exhausted as described above is surrounded by the sound insulation cylinder 3 attached to the outer periphery of the fan cover 20 as described above, and the exhaust to the discharge side is performed. Flows along the inside of the sound insulation cylinder 3, changes the direction at the end of the sound insulation cylinder 3, follows the flow flowing outside, and passes through the exhaust holes 17, 17. Released to the outside. Such an exhaust flow also occurs in the same manner for the exhaust from the exhaust port 24 of the electric motor 21.

  The exhaust from the fan cover 20 includes an operation sound accompanying the rotation of the impeller inside the fan cover 20, and the exhaust from the electric motor 21 includes the rotor inside the electric motor 21. Although the operation sound accompanying the rotation of the sound insulation cylinder 3 is included, these operation sounds are blocked by the sound insulation cylinder 3 and are attenuated while following the return path from the inside to the outside of the sound insulation cylinder 3. The operating sound emitted to the outside of the main body housing 1 together with the exhaust from 17, 17,... Is reduced to a level that does not cause discomfort to the user.

  The sound insulation cylinder 3 has a cylindrical shape whose diameter is reduced from the mounting side to the fan cover 20 toward the other side, in other words, in the direction of the flow of exhaust from the fan cover 20, so that the flow of exhaust is reduced. The flow gradually reduces the cross-sectional area, that is, a so-called tapered flow, and a sound reduction effect is also obtained by stabilizing the flow form, so that the operation sound released to the outside of the main body housing 1 can be reduced more effectively.

  Further, the sound insulation cylinder 3 changes the direction of exhaust from the fan cover 20 and prevents direct movement to the exhaust holes 17, 17. It does not give any resistance to the flow. Therefore, there is no possibility of increasing the driving load of the electric blower 2, and a desired dust-absorbing performance can be obtained without increasing the size of the driving electric motor 21, and the vertical cleaning apparatus configured as shown in FIG. A particularly effective soundproof structure is provided for a small vacuum cleaner in which the increase in size and weight of the main body housing causes deterioration in operability, such as a vacuum cleaner or a handy type vacuum cleaner provided with a dust suction nozzle and a handle in the main body housing itself. be able to.

  FIG. 5 is a cross-sectional view showing an internal configuration of a main part of the main body housing 1 showing another embodiment of the vacuum cleaner according to the present invention. In this embodiment, sound absorbing materials 4 and 4 having an appropriate thickness are attached to the inner wall of the sound insulation tube 3 and the end wall surface of the exhaust chamber 16 facing the end of the sound insulation tube 3. Other constituent elements are the same as those in the embodiment shown in FIG. 2, and the corresponding constituent elements are denoted by the same reference numerals as those in FIG. 2, and detailed description of the configuration and operation is omitted.

  In this embodiment, the exhaust gas discharged from the fan cover 21 first contacts the sound absorbing material 4 adhered to the inner surface of the sound insulation cylinder 3 while flowing along the inner side of the sound insulation cylinder 3, and the sound insulation. When the direction is changed at the end of the tube 3, it comes into contact with the sound absorbing material adhered to the end wall surface of the exhaust chamber 16, and the sound contained in the exhaust flow is absorbed by these contacts, so that the exhaust hole 17 , 17... Can be more effectively reduced.

  As the sound absorbing materials 4 and 4, a resin sheet having both air permeability and sound absorbing properties such as urethane foam can be used. Since the sound absorbing materials 4 and 4 are attached to the inner surface of the sound insulation cylinder 3 and the end wall surface of the exhaust chamber 16 without blocking the exhaust flow path as shown in the figure, the resistance imparted to the exhaust flow is It is slight, and a high soundproofing effect can be obtained while suppressing an increase in the driving load of the electric blower 2 slightly.

It is an external appearance perspective view of the vacuum cleaner which concerns on this invention. It is sectional drawing which shows the internal structure of the principal part of a main body housing. It is an external appearance perspective view of a sound insulation cylinder. It is an external appearance perspective view which shows other embodiment of a sound insulation cylinder. It is sectional drawing which shows the internal structure of the principal part of the main body housing which shows other embodiment of the vacuum cleaner which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body housing 2 Electric blower 3 Sound insulation cylinder 4 Sound absorbing material
17 Exhaust hole
20 Fan cover
21 Electric motor
22 Support ring

Claims (5)

In the vacuum cleaner that is configured to discharge the exhaust from the electric blower for dust absorption supported inside the main body housing to the outside through the exhaust hole opened in the main body housing,
One side is fitted to the outer periphery of the fan cover of the electric blower, and a sound insulation cylinder is provided to block between the exhaust outlet and the outside of the motor for driving the electric blower and the exhaust hole. Electric vacuum cleaner.   The vacuum cleaner according to claim 1, wherein the sound insulation cylinder is integrally formed with a support ring that elastically supports the fan cover inside the main body housing.   The vacuum cleaner according to claim 1 or 2, wherein the sound insulating cylinder is tapered in a tapered shape toward a downstream side in the exhaust flow direction.   The electric vacuum cleaner according to any one of claims 1 to 3, further comprising a sound absorbing material attached to an inner surface of the sound insulation cylinder so as to have a thickness that does not inhibit the flow of the exhaust gas.   5. The sound absorption material according to claim 1, further comprising a sound absorbing material attached to an inner surface of the main body housing facing the opening end of the sound insulation cylinder so as to have a thickness that does not inhibit the flow of the exhaust. The vacuum cleaner described.

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