TWI581748B - Vacuum cleaner - Google Patents

Description

vacuum cleaner

The present invention relates to a vacuum cleaner including an electric blower.

A technique of providing a sound absorbing material in the inside of the air intake passage of the dust collecting chamber to the electric blower as a method of reducing the noise generated from the vacuum cleaner is proposed (for example, refer to Patent Document 1).

[Advanced technical literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-11058

However, the vacuum cleaner described in Patent Document 1 must be inserted into the inner tube in the intake passage when the sound absorbing material is provided in the intake passage, so The opening area of the intake passage which can reduce the noise is reduced, and there is a concern that the air volume of the electric blower is reduced.

An object of the present invention is to provide a vacuum cleaner which can reduce noise without reducing the amount of air.

The solution includes: a motor housing set including: an electric blower that generates an attractive force; and a housing case that houses the electric blower; a dust collecting part that collects dust; and an intake passage that is to be collected from the dust collecting unit The air of the portion is guided to the air intake port of the motor casing group; and the frame body houses the motor casing group together with the air intake passage, and the air intake passage is provided with air for introducing the dust collecting portion from the dust collecting portion. An introduction port in a direction in which the axial direction of the rotating shaft of the electric blower faces in the intersecting direction, and a member having a sound-absorbing effect of a plate-like shape in a direction corresponding to the intake port is directed toward the suction from the introduction port with respect to the axial direction The air port is disposed obliquely between the intake passage and the frame in such a manner that the air inlet is close to the intake port.

According to the present invention, it is possible to provide a vacuum cleaner which can reduce noise without reducing the amount of wind.

1‧‧‧ vacuum cleaner

2‧‧‧ vacuum cleaner body

7‧‧‧Dust collection department

10‧‧‧ frame

11‧‧‧ Lower case

12‧‧‧Upper casing

20‧‧‧Motor housing group

21‧‧‧Electric blower

22‧‧‧ housing housing

21a‧‧‧Rotary axis

30‧‧‧Inhalation channel

31‧‧‧Import

32‧‧‧Sloping surface

40‧‧‧Control substrate (members with sound-blocking effect)

Fig. 1 is a view showing the overall appearance of a vacuum cleaner according to an embodiment of the present invention. Stereo picture.

Fig. 2 is an exploded perspective view showing the cleaner body.

Fig. 3 is a schematic longitudinal cross-sectional view showing a motor housing group and a schematic view of air flow of air.

Fig. 4 is an exploded perspective view showing a main part of the casing.

Fig. 5 is a perspective view showing a state in which an intake passage and a control board are mounted in a motor housing group.

Fig. 6 is an enlarged schematic view showing the effect of sound reduction.

In the following, the embodiment of the present invention will be described with reference to the drawings, and the present invention is not limited thereto, and may be appropriately modified and implemented within the scope of the gist of the invention.

As shown in Fig. 1, the cleaner 1 includes a cleaner body 2, a hose portion 3, an operation tube 4, an extension tube 5, and an inhalation device 6.

The cleaner body 2 is provided with an electric blower 21 (see FIG. 2) for generating an attractive force, and a dust collecting portion 7 or the like for accommodating dust collected by the suction force of the electric blower 21.

One end of the hose portion 3 is connected to the connection port 11a of the cleaner body 2 to communicate with the dust collecting portion 7 of the cleaner body 2. Further, the other end of the hose portion 3 is connected to one end of the operation tube 4.

The operation tube 4 is provided with a grip 4a or the like having a hand operation switch SW or the like. It can be cut by operating the switch SW or the like at the hand of the operation tube 4. The strength of the operation of the electric blower 21 (see FIG. 2) is changed.

The extension pipe 5 is provided with an outer pipe 5a and an inner pipe 5b, and is connected to one end of the inner pipe 5b at the other end of the outer pipe 5a, and is connected to a ventilation passage (not shown) provided inside the outer pipe 5a and the inner pipe 5b. Flexible and flexible. In addition, FIG. 1 is a state in which the extension tube 5 is the shortest.

The suction device 6 is, for example, a housing 6a that accommodates a rotary brush (not shown) that is in contact with a surface to be cleaned (ground or the like), and is rotatably coupled to the housing 6a, and can be connected to the extension tube. 5 is configured by a joint portion 6b or the like that is detachably connected.

Fig. 2 is an exploded perspective view showing the body of the cleaner. In addition, FIG. 2 shows a state in which the intake passage 30 and the control board 40 are mounted together.

As shown in FIG. 2, the cleaner body 2 is provided with the frame 10 formed by the lower case 11 and the upper case 12 which comprise a periphery, and the motor case group 20, the suction-channel 30, and the control board 40 are accommodated in the frame 10. And it is composed.

The lower casing 11 includes a bottom surface portion 11s, and a connection port 11a that rises upward from a front end portion of the bottom surface portion 11s to one end that connects the hose portion 3, and wheel mounting portions 11c and 11c that are from the bottom surface portion 11s. The left and right sides of the rear portion are erected to rotatably support the wheels W, W. Further, the lower casing 11 includes a lower side surface portion 11d (only one side is shown) rising from the bottom surface portion 11s between the connection port 11a and each of the wheel mounting portions 11c; and a rear end between the wheel mounting portions 11c The rear portion 11e that rises from the bottom portion 11s. Further, the lower surface (ground) side wheel 11f (see FIG. 3) of the bottom surface portion 11s is rotatably provided.

The upper casing 12 covers the upper portion of the lower casing 11, and is provided with a detachable dust collecting portion 7 from the central portion in the front-rear direction toward the front portion. Further, a rear portion of the upper casing 12 is provided with an exhaust portion 12a that discharges air from the motor casing group 20 to the outside. Moreover, the upper casing 12 is provided with a slightly arched grip portion 12b and a power cord pull-out port 12c that are used when the cleaner body 2 is transported. Further, the upper surface of the upper casing 12 has an inclined surface 12d which is lowered from the dust collecting portion 7 to the exhaust portion 12a between the upper surface 7s of the dust collecting portion 7 and the exhaust portion 12a.

The motor housing group 20 is composed of an electric blower 21 and a housing case 22 that houses the electric blower 21, and is disposed between the wheel mounting portions 11c and 11c in the lower casing 11, and is screwed to the bottom surface portion 11s. . Further, a wire reel R having a winding power supply line (not shown) in the lower casing 11 and the motor casing group 20 are arranged side by side in the left-right direction.

Fig. 3 is a schematic longitudinal cross-sectional view showing a motor housing group and a schematic view of air flow of air. Further, the illustration of the division between the side of the dust collecting portion 7 and the side of the motor casing group 20 is omitted in FIG.

As shown in Fig. 3, the electric blower 21 includes a rotating shaft 21a, a rotating blade 21b fixed to one end (upper end) of the rotating shaft 21a, a rotor 21c fixed to the rotating shaft 21a, and a rotor 21c opposed to each other. The stator 21d and the outer casing 21e are housed. In the outer casing 21e, a circular suction port 21e1 is formed at a central portion of the upper surface facing the rotor blade 21b. Further, a communication hole 21f that communicates a space between the outer casing 21e and the accommodating case 22 is formed on the circumferential surface of the bottom side of the outer casing 21e.

Further, the electric blower 21 is such that the rotating shaft 21a faces vertically In the direction (for example, the longitudinal direction), the suction port 21e1 is housed in the housing case 22 in the vertical direction. Further, although not shown, the electric blower 21 is supported in the accommodating case 22 via an anti-vibration member such as rubber, and the vibration generated when the driving of the electric blower 21 is prevented from being transmitted to the outside of the accommodating case 22 is configured. .

Further, the dust collecting portion 7 is a cyclone type, and a well-known technique can be applied, and the dust separating portion 7a and the dust containing portion 7b are provided. The dust separating portion 7a separates the dust into light dust and heavy dust by centrifugal force. The dust accommodating portion 7b is provided with a dust collecting cage 7c to collect heavy dust.

In Fig. 3, as indicated by the solid arrow mark and the dotted arrow mark, the air (dotted arrow mark) of the light dust separated by the dust separating portion 7a is not passed through the dust containing portion 7b toward the filter F1. The heavy dust separated by the dust separating unit 7a is collected in the dust collecting cage 7c of the dust accommodating portion 7b, and the trapped air passes through the dust collecting cage 7c toward the filter F1. Moreover, the air passing through the filter F1 is introduced into the intake passage 30. Further, the filter F1 can be, for example, a high-efficiency Partitioning Air Filter.

Fig. 4 is an exploded perspective view showing an essential part of the casing. Further, the control substrate 40 shown in FIG. 4 is an illustration of a simplified actual mounting component.

As shown in Fig. 4, the housing case 22 is composed of a container body 22a made of a synthetic resin having a substantially bottomed cylindrical shape, and a lid portion 22b made of a synthetic resin covering the upper portion of the container body 22a.

The container body 22a is an opening 22a1 having a slightly circular shape thereon, The electric blower 21 is housed in a state in which the upper portion of the electric blower 21 protrudes from the opening 22a1. On the circumferential surface of the container body 22a, a slightly rectangular opening 22d is formed on the front side thereof, and a filter is attached to the opening 22d. F2. Further, the filter F2 can be, for example, a high-efficiency Particulate Air Filter.

The lid portion 22b is attached to the container body 22a, and covers the opening 22a1 including the electric blower 21 that protrudes from the container body 22a. Further, on the upper surface of the lid portion 22b, a circular intake port 22c is formed at a position opposed to the suction port 21e1.

In the container body 22a, the hub 22a2 for screw fixing is formed in the vicinity of the opening 22a1 at a plurality of intervals in the circumferential direction. In the lid portion 22b, a mounting piece 22b1 for screw penetration is formed at a position corresponding to the hub 22a2. The screw 22n is screwed to the hub 22a2 through the mounting piece 22b1, and the container body 22a and the lid portion 22b are fixed to each other. The airtightness is ensured so that the air sucked by the electric blower 21 does not leak from between the container main body 22a and the lid portion 22b.

In the motor casing group 20 configured as described above, the air sucked from the intake port 22c (suction port 21e1) is discharged from the communication hole 21f (see FIG. 3) to the outside of the electric blower 21 through the inside of the electric blower 21. The space between the electric blower 21 and the accommodating case 22 is then discharged to the outside of the accommodating case 22 through the filter F2. In addition, the air discharged from the filter F2 flows to the side of the bottom surface side and the side surface of the motor casing group 20, and flows to the side of the intake passage 30 through the control board 40, and the outlet port 12c is pulled out from the exhaust portion 12a and the power source line. (refer to Figure 2), etc. are discharged to the frame 10 outside. In this manner, the control substrate 40 is cooled by the air discharged from the filter F2 through the control substrate 40.

The intake passage 30 has an introduction port 31 into which air from the dust collecting portion 7 is introduced. The inlet 31 is configured to completely suck in air from the dust collecting portion 7 (air passing through the filter F1). Further, the introduction port 31 is formed so that the dust collecting portion 7 is tilted and attached to the casing 10, and is formed in the front direction.

Further, the intake passage 30 has an inclined surface 32 that descends rearward from the inlet port 31. The inclined surface 32 is formed in a slightly semicircular shape toward the intake port 22c. Further, a peripheral wall 32a extending downward in the vertical direction (the cover portion 22b) is formed in the peripheral portion of the inclined surface 32.

Further, the intake passage 30 has support portions 33a, 33b, 33c, and 33d for supporting the positioning control substrate 40. The support portions 33a, 33b, and 33c support the edge portion of the upper side (the introduction port 31 side) of the control board 40, and the support portion 33d supports the lower side of the control board 40 (the side of the intake port 22c).

Moreover, the hubs 34a and 34a for fixing the screws of the control board 40 are formed in the intake passage 30. Screw passage holes 42, 42 are formed in the control substrate 40, and the control substrate 40 is fixed to the intake passage 30 via the screws 43, 43.

Further, the intake passage 30 is provided with the attachment holes 35 for fixing the intake passage 30 to the housing case 22 (the screws for the cover portion 22b are inserted. The housing case 22 (cover portion 22b) is Hubs 22b2 and 22b2 for screw fixing are formed at positions corresponding to the attachment pieces 35 and 35.

The control substrate 40 controls the electric blower according to the operation mode. The rotation speed of 21, etc., and a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), various circuits, and input/output interfaces are actually mounted on the substrate 40a having a quadrangular shape. And it is composed. Further, the control board 40 has connectors C1 and C1 connected to each other when the program stored in the ROM is rewritten. In addition, FIG. 4 is a diagram which simplifies various circuits actually mounted on the substrate 40a (the same applies to FIGS. 2 to 6).

Further, an LED (Light Emitting Diode) (not shown) is actually mounted on the control board 40. The LED is used to illuminate the light guide tube 12e (see FIG. 2) disposed on the inclined surface 12d, to inform the user of the time when the ground is littered, and to be placed on the upper surface of the cleaner body 2 that is easy for the user to see (see FIG. 2 for tilting). Face 12d). Therefore, when the control substrate 40 is not positioned near the light guide tube 12e, the LED substrate different from the control substrate 40 is required directly under the light guide tube 12e. However, in the present embodiment, the control substrate 40 can be disposed on the light guide. Since the tube 12e is directly below, the substrate for LED can be reduced.

As shown in FIG. 4, when the intake port 22c is projected to the intake passage 30 and the control substrate 40 in the vertical direction, as indicated by a broken line R1, it is configured to cover the suction by the inclined surface 32 of the intake passage 30. The entirety of the opening 22c in the vertical direction is as shown by the broken line R2, and the housing case 22 and the intake passage 30 and the control board 40 are overlapped, and the entire upper portion of the intake port 22c in the vertical direction is covered by the control substrate 40.

Fig. 5 is a perspective view showing a state in which an intake passage and a control board are attached to a motor housing group.

As shown in FIG. 5, the support portions 33a and 33b are positioned on the lower surface side of the control substrate 40, and the control substrate 40 is supported from the lower side. The support portion 33c is positioned on the upper surface side of the control substrate 40 to prevent the control substrate 40 from floating.

The support portion 33d is inserted into the notch portion 41 formed at the edge of the control board 40. Thereby, positioning the control substrate 40 at the intake passage 30 prevents the side of the control substrate 40 from being deflected.

The control board 40 is disposed so as to be inclined from the introduction port 31 of the intake passage 30 toward the intake port 22c (see FIG. 4) of the motor housing group 20 so as to approach the intake port 22c. Further, the control substrate 40 has the substrate 40a disposed in parallel along the inclined surface 32 of the intake passage 30 (see FIG. 3). The entire inclined surface 32 of the intake passage 30 is covered by the control substrate 40.

Fig. 6 is an enlarged schematic view showing the effect of sound reduction. In addition, FIG. 6 is a partially enlarged view of the rotary wing 21b flowing from the filter F1 of FIG. 3 to the electric blower 21.

As shown in FIG. 6, when the air K flowing in from the inlet port 31 of the intake passage 30 collides with the inclined surface 32, sound (fluid sound) is generated, and metal is generated from the intake port 22c of the motor housing group 20 toward the vertical direction. Sound and so on.

The sound generated by the collision with the inclined surface 32 is divided into the transmitted sound A1 and the sound A2 reflected on the inclined surface 32 while being attenuated by the inclined surface 32. Further, the sound A1 penetrating the inclined surface 32 of the air intake passage 30 collides with the control substrate 40, and is further divided into the sound A3 having a low noise level and the sound A4 reflected on the control substrate 40 through the control substrate 40. Thus, the noise generated in the intake passage 30 is divided into sound and reflection which are penetrated by both the inclined surface 32 of the intake passage 30 and the control substrate 40. The sound is greatly attenuated, and the noise that is discharged outside the cleaner body 2 can be effectively reduced.

Further, the sound A11 discharged from the intake port 22c of the motor casing group 20 into the intake passage 30 is separated from the inclined surface 32 of the intake passage 30, and is split while being attenuated by the inclined surface 32. The sound A12 and the sound A13 reflected on the inclined surface 32. Further, the sound A12 penetrating the inclined surface 32 of the air intake passage 30 collides with the control substrate 40, and is further divided into the sound A14 having a low noise level and the sound A15 reflected on the control substrate 40 through the control substrate 40. As described above, the noise emitted from the intake port 22c of the motor casing group 20 is largely attenuated by the sound that is split between the inclined surface 32 of the intake passage 30 and the control substrate 40, and the reflected sound is greatly attenuated. The noise that is discharged outside the cleaner body 2 is effectively reduced.

Furthermore, the control board 40 is disposed to cover most of the rear side of the introduction port 31 in the horizontal direction. Thereby, the fluid sound generated by the swirling flow in the dust separating portion 7a and the fluid sound generated when passing through the dust containing portion 7b in the intake passage 30 together with the air K can be reduced by the same principle as described above.

As described above, according to the vacuum cleaner 1 of the present embodiment, the control board 40 (a member having a sound-blocking effect in a plate shape) is not sucked in the horizontal direction but in the position corresponding to the intake port 22c of the motor housing group 20. The introduction port 31 of the air passage 30 is disposed obliquely disposed between the upper portion of the intake passage 30 and the upper casing 12 (frame 10) toward the intake port 22c so as to approach the intake port 22c, as illustrated in FIG. The inflow from the inlet 31 can be reduced Both the noise generated when the air K collides with the inclined surface 32 and the noise emitted from the electric blower 21 can effectively reduce the noise discharged to the outside of the cleaner body 2.

Further, according to the present embodiment, the electric blower 21 is disposed such that the rotation shaft 21a of the electric blower 21 is oriented in the longitudinal direction and the intake port 22c is upward, and the control board 40 is disposed between the upper portion of the intake passage 30 and the casing 10 to be effectively utilized. The space of the frame 10.

Further, according to the aspect of the present invention, the intake passage 30 has an inclined surface 32 formed along the inclination of the control substrate 40, and for example, when the intake passage is formed in a longitudinal section and viewed in an L shape (refer to FIG. 14 of JP-A-2012-11058). When the corner portion is formed, the control substrate 40 (member having a sound insulating effect) is formed to be small.

Further, according to the present embodiment, since the control board 40 (see FIG. 4) is disposed integrally over the vertical direction of the intake port 22c, it is more likely to cover a part of the upper side of the intake port 22c in the vertical direction. The sound discharged from the intake port 22c is effectively attenuated. Therefore, it is possible to effectively reduce the metallic sound to the user.

Further, according to the present embodiment, the control substrate 40 is used as a member having a sound insulating effect, and since it is not necessary to separately provide the sound absorbing plate and the sound insulating plate with the control substrate 40, the number of parts can be reduced.

Further, according to the present embodiment, when the control substrate 40 is placed obliquely, and water enters the control substrate 40 from the outside of the cleaner body 2, since the water does not accumulate, the control substrate 40 flows, so that the control substrate 40 can be prevented from being damaged.

Further, according to the present embodiment, by arranging the control board 40 above the air intake passage 30, the connector C1 of the control board 40 can be inserted by removing the upper casing 12 from the cleaner body 2, and the weight is required to be generated. When writing a program stored in the ROM of the control board 40, the rewriting operation is facilitated.

Further, in the present embodiment, the exhaust portion (exhaust hole) is not formed in the upper casing 12 (frame 10) in the vertical direction of the intake port 22c of the motor casing group 20, and the effect can be further improved. Reduce metal sound.

In addition, in the above-described embodiment, the rotation shaft 21a of the electric blower 21 is formed in the longitudinal direction, but the direction of the rotation shaft 21a of the electric blower 21 may be oriented in the horizontal direction (front-rear direction, left-right direction). .

Further, in the above-described embodiment, the intake shaft 21 is disposed in the vertical direction and the intake port 22c is upward, and the intake passage 30 is disposed on the upper portion of the intake port 22c, and the control substrate 40 is disposed above the intake passage 30. In other cases, the rotation shaft 21a may be oriented in the longitudinal direction and the intake port 22c may be downward. The intake passage 30 may be disposed in the lower portion of the intake port, and the control substrate 40 may be disposed below the intake passage 30.

12a‧‧‧Exhaust Department

12c‧‧‧Power cord pull outlet

12d‧‧‧ sloped surface

12b‧‧‧Control Department

7‧‧‧Dust collection department

7s‧‧‧above

2‧‧‧ vacuum cleaner body

12‧‧‧Upper casing

12e‧‧‧Light pipe

40‧‧‧Control substrate

30‧‧‧Inhalation channel

20‧‧‧Motor housing group

21‧‧‧Electric blower

22‧‧‧ housing housing

22c‧‧‧ suction port

11c‧‧‧ Wheel Mounting Department

W‧‧‧ Wheels

11e‧‧‧The back part

11s‧‧‧ bottom part

11d‧‧‧lower side

11‧‧‧ Lower case

11a‧‧‧Connecting port

F2‧‧‧ filter

Claims (6)

A vacuum cleaner comprising: a motor housing set including: an electric blower that generates an attractive force; and a housing case that houses the electric blower; a dust collecting portion that collects dust; and an intake passage that Air from the dust collecting portion is guided to an intake port of the motor casing group; and a casing that accommodates the motor casing group together with the intake passage, and the intake passage is provided with the dust collecting portion from the dust collecting portion The introduction of the air into the introduction port in the direction in which the axial direction of the rotation shaft of the electric blower intersects, and the member having the sound-absorbing effect of the plate-like shape is introduced from the aforementioned direction with respect to the axial direction at a position corresponding to the intake port. The port is obliquely disposed between the intake passage and the frame so that the intake port approaches the intake port. The vacuum cleaner according to claim 1, wherein the electric blower is disposed such that a rotation axis of the electric blower is in a longitudinal direction and the intake port is upward, and the upper portion of the intake passage is disposed between the upper casing and the casing. A component with a sound-blocking effect. The vacuum cleaner according to claim 2, wherein the upper portion of the intake passage has an inclined surface formed along a slope of the member having the sound shielding effect. A vacuum cleaner according to claim 3, wherein the front The member having the sound-blocking effect is disposed to cover the entirety of the air intake opening above the vertical direction. The vacuum cleaner according to any one of claims 1 to 4, wherein the member having a sound insulating effect is a control substrate for controlling the electric blower. The vacuum cleaner according to claim 3, wherein the member having the sound insulating effect is disposed to cover a majority of the horizontal direction rearward of the introduction port of the intake passage.