JP3291671B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner having a large dust collection volume and a low noise irrespective of the size of the vacuum cleaner body.

[0002]

2. Description of the Related Art FIGS. 7 to 9 are explanatory views of a conventional vacuum cleaner. FIGS. 7 and 8 show a vacuum cleaner described in Japanese Patent Application Laid-Open No. 61-179121. 7 and 8, 1 is a main body case, 2 is a dust collection room, 3 is an electric blower room,
Reference numeral 4 denotes an exhaust chamber, and reference numeral 5 denotes an exhaust passage. The exhaust flow path 5 is provided at the bottom of the main body case 1 and has an upper flow path 5a for guiding exhaust gas once forward and a U-turn part 5c for making a U-turn in the flow.
And a lower passage 5 for sending the U-turned exhaust gas to the rear exhaust chamber 4.
b. 11 is a dust container, 1
3 is a suction port, 17 is an electric blower, 20 is an L-shaped rib,
21 is a communication hole, 22 is a guide rib for dividing the flow path of the U-turn part 5c, and 23 is a sound absorbing material.

[0003] In the vacuum cleaner having such a structure, dust sucked from the suction port 13 is captured by the dust collection container 11, and the air filtered by the filter medium is sucked into the electric blower 17. The sucked air enters the exhaust passage 5 on the bottom surface of the main body 1 through the communication hole 21 formed in the bottom surface of the electric blower room 3, is silenced by the sound absorbing material 23 in three long passages, and is exhausted to the outside from the exhaust room 4. Is done.

FIG. 9 shows a conventional vacuum cleaner of this type (see, for example, FIG. 3 of Japanese Patent Application Laid-Open No. 4-319323).
Etc.) are shown. In FIG. 9, reference numeral 1a denotes a lower case of the main body case 1, and 1b denotes an upper case. Inside the main body case 1, a dust collecting chamber 2, an electric blower chamber 3 and an exhaust chamber 4 are provided in this order from the front. 17 is an electric blower, 18 and 1
9 is an anti-vibration rubber, and 25 is an exhaust filter. Also, 27
Is a dust bag, 29 is a soundproof cover, 39 is a rear cover, 40
Is a sound absorbing material. The rear cover 39 is attached by being sandwiched between the lower case 1a and the upper case 1b.
Is attached.

In the conventional vacuum cleaner shown in FIG. 9, dust sucked from a suction port (not shown) is collected in a dust bag 27, and filtered air is sucked into an electric blower 17 to be electrically driven together with noise. It is discharged out of the blower 17. Exhaust noise discharged from the electric blower 17 is prevented from diffusing and transmitting by the soundproof cover 29 and flows into the exhaust chamber 4 from the electric blower room 3. The exhaust noise is reduced in flow velocity in the exhaust chamber 4 and filtered by the exhaust filter 25. The exhaust noise collides with the sound absorbing material 40 of the rear cover 39 provided on the rear surface, absorbs and attenuates the sound, and is discharged outside from the rear portion of the main body case 1.

[0006]

As described above, the conventional vacuum cleaner shown in FIGS. 7 and 8 has a long exhaust passage 5 for preventing noise.
Are provided in a wide portion extending from the bottom portion of the main body 1 to the electric blower room 3 and the dust collection room 2. For this reason, the height of the electric blower room 3 provided above is reduced, and the volume of the dust collection chamber 2 is particularly limited. If the size of the main body case 1 is to be maintained at a limited dust collection volume, the dust collection bag becomes small, and as a result, a situation arises in which customers are unpopular.

[0007] In the case of the upper and lower two-part case vacuum cleaner shown in FIG. 9, a rear cover 39 provided with a sound absorbing material 40 is attached to the rearmost part of the main body case 1. Therefore, not only does the overall length of the main body case 1 increase, but also the
However, there is a problem that the noise is increased because it is fixed to the lower case 1a side.

The present invention has been made to solve the problems of the conventional vacuum cleaner, and has a compact, compact and low-noise body without limiting the occupied volume of a dust collection chamber and the like. It is an object of the present invention to realize a vacuum cleaner that can be configured , is easy to assemble , and has a low manufacturing cost.

[0009]

In the vacuum cleaner according to the present invention, the rear of the case of the cleaner body is defined as a blower room for accommodating an electric blower, and an exhaust room having an exhaust passage and an exhaust port. a semi-pan-bottom shaped holding frame, and the holding member for supporting the front and rear of the electric blower, the blower chamber I covering the exhaust side of the electric blower
A cup-shaped soundproof cover forming a soundproof room having an exhaust passage therein, and a sound absorbing member disposed in an air passage from the electric blower to the exhaust port, wherein the sound absorbing member is a fan of the electric blower.
A first sound absorbing member annularly attached to a step of the case;
Circle placed in the soundproof room with the portion in contact with the first sound absorbing member
Facing the second cylindrical sound absorbing member and the exhaust path of the soundproof room
The third sound absorbing member provided and the exhaust passage near the exhaust port
And a fourth sound absorbing member attached to the inner surface of the body case.
And hold the holding frame to the main body case.
The wood is obtained by supporting the hold frame.

[0010]

The dust sucked from the suction port is collected in a dust bag, and the air passing through the air filter is sucked into the electric blower. The electric blower is attached to the main body via the holding frame and holding member.
Since it is supported by the base, vibration noise caused by rotation is reduced.

On the other hand, the electric blower is cooled by the sucked air, and the vibration noise and the internal rotation noise are discharged into the soundproof cover on the exhaust flow, and then go to the exhaust port. During this time, part of the noise is shielded by the soundproof cover, but most of the noise is absorbed by the sound absorbing member provided in the air passage from the electric blower to the exhaust port, that is , the step portion of the fan case of the electric blower.
A first sound absorbing member attached in an annular shape to the first portion, and an end portion of the first sound absorbing member.
A cylindrical second suction member disposed in the soundproof room in contact with the member;
Third sound absorbing member provided to face the sound member and the exhaust path of the soundproof room
The inner surface of the body case up to the exhaust port near the members and exhaust passage
Is absorbed by the fourth sound absorbing member attached to the second member . Then, the exhaust gas is conveyed to the exhaust having a reduced flow velocity in the exhaust chamber having a large volume, and the remaining slight noise is radiated into the atmosphere from the exhaust port together with the exhaust that has passed through the exhaust filter.

[0012]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 2 is a configuration explanatory view of an embodiment of the present invention . In FIG.
1 is a main body of the vacuum cleaner, and 2 is a case of the main body 1. Body 1
Is formed in a small helminth-like shape with a short left and right length and a slightly thicker vertical direction as shown in the figure. Case 2
Is composed of an upper case 2a and a lower case 2b made of synthetic resin, and is formed into a two-part type that is vertically divided in the same manner as the above-described case of the vacuum cleaner of FIG. 3 is case 2
A dust collection chamber 4 is defined in the inside, a blower room 4, and an exhaust room 5.

Reference numeral 6 denotes an inlet provided through the upper case 2a, 7 denotes a dust bag, and 8 denotes an air filter. Dust bag 7
Is opened in the suction port 6 and is housed in the dust collection chamber 3 so as to be able to be taken out. The air filter 8 includes a filter 8a and a ventilation plate 8b having the filter 8a attached to a plate surface. 11 is a holding frame, 12 is an electric blower. The holding frame 11 is resin-molded in a half pan bottom shape as shown in the figure, and forms a partition on the bottom side of the blower room 4.

Reference numeral 11a denotes a fixing portion protruding toward the lower case 2b of the holding frame 11, 11b denotes a communication hole, and 11c denotes a flange. The front end of the holding frame 11 is fixed to the lower case 2b by screws 11d inserted into the fixing part 11a, and the flange 11c at the rear end is vertically held by the bosses 2c and 2d of the case 2. The blower chamber 4 is formed by the holding frame 11 in a space in the main body 1.

The electric blower 12 is composed of a flange-shaped fan case 12a on the left side and a large-diameter fan case 12a and a motor case 12b on the right side. The motor case 12b is provided with a plurality of rectangular exhaust holes 12c. Have been. 13a,
13b is a holding member of a viscoelastic substance such as a viscoelastic polymer material, and the holding member 13a is formed in a slightly large annular shape. The other holding member 13b has a substantially concave cross section.

The ring-shaped holding member 13a is connected to the fan case 1
2a. Further, the holding member 13b is fitted to a convex portion on the rear side of the motor case 12b, and its outer periphery is locked by being pressed by the upper case 2a and the bosses 2e and 11e of the holding frame 11. And two holding members 13a
And 13b, the electric blower 12 is held in the blower room 4 in a vibration-damping manner.

Reference numeral 14 denotes a soundproof cover. Soundproof cover 14
Is made of ABS, PP, or the like, is formed in a cup shape having a diameter substantially equal to that of the fan case 12a, forms an annular exhaust passage 14a at an open end, and has a holding member 13b formed by a hole provided on the bottom surface.
It is attached to. A soundproof cover 15 surrounds the outer periphery of the motor case 12b and leaves an exhaust path 14a, and a substantially cylindrical soundproof chamber 15 is formed inside the blower room 4.

Reference numerals 16a to 16c denote first to third sound-absorbing members which are porous and gas-permeable or air-impermeable. The first sound absorbing member 16a is made of a slightly air-permeable material such as felt and is formed in a somewhat large annular shape, and the second sound absorbing member 16b is formed of a gas permeable material such as sponge and has a cylindrical shape. Annular first
The sound absorbing member 16a is attached to the step portion of the fan case 12a, and the second sound absorbing member 16b has the end portion of the first sound absorbing member 16a.
a and is arranged in the soundproof room 15. As a result, the exhaust of the electric blower 12 in the soundproof chamber 15, first and second
It is almost completely enclosed by the two sound absorbing members 16a and 16b. Further, the third sound absorbing member 16c is attached to the inner surface of the upper case 2a or the holding frame 11, and faces the annular exhaust passage 14a of the soundproof room 15.

Reference numeral 17 denotes an exhaust passage formed by the space between the holding frame 11 and the lower case 2b; 17a, a fourth sound absorbing member of the same quality as described above; 18, an exhaust filter; and 19, an exhaust port provided on the back of the main body 1. It is. The fourth sound absorbing member 17a is the exhaust port 1
9 is attached to the inner surface of the lower case 2b.
The upstream side of the exhaust passage 17 communicates with the blower room 4 through the communication port 11b, and the downstream side is opened to the atmosphere through the exhaust port 19.

Reference numeral 21 denotes a bumper provided on a side surface of the main body 1,
Reference numeral 22 denotes front and rear wheels, and reference numeral 23 denotes a floor surface such as a plate floor or a folded floor. Although not shown in detail, the upper case 2a
The upper surface of the dust bag 7 is openable and closable.
Are housed in the dust collecting chamber 3 so as to be freely taken out. Further, a code reel is provided on the back side of FIG.

The operation of the embodiment of the present invention having such a configuration is described below.
Next, a description will be given. A hose connection port is inserted into the suction port 6 of the main body 1, and a floor brush or the like is connected to an end of the hose via an extension pipe. When the cord is connected to a power source and the switch is turned on, the electric blower 12 in the blower room 4 is driven, and dust or dirt on the floor surface is sucked into the suction port 6 via a floor brush or the like. It is.

The dust sucked from the suction port 6 is
Then, the air that has been collected and filtered by the air filter 8 is sucked into the electric blower 12. Since the electric blower 12 is held in the blower room 4 by the holding members 13a and 13b in a vibration damping manner, vibration noise caused by rotation of the rotor and the fan is reduced. In particular, the blower room 4 holds the main body 1 by the holding frame 11.
, All the noise generated by the electric blower 12 and transmitted directly to the outside through the case 2 is reduced.

On the other hand, the electric blower 12 is cooled by the air passing therethrough while being sucked, and the reduced vibration noise, the wind noise of the fan generated inside the rotor, the rotation noise of the rotor, and the like are put on the exhaust flow and the air blows out. As shown by the arrow, the air is discharged from the exhaust hole 12c into the soundproof room 15. Most of the noise such as the rotation noise discharged into the soundproof room 15 is absorbed by the surrounded first and second sound absorbing members 16a and 16b. In addition, a part of the noise traveling in the rear direction of the electric blower 12 is
And the propagation in the medium is suppressed.

The residual noise in the soundproof room 15 is
The exhaust gas is discharged from the communication hole 11b together with the exhaust gas from the exhaust passage 4a, and is absorbed by the fourth sound absorbing member 17a disposed along the flow from the exhaust passage 17 having a somewhat longer flow path provided at the outlet. Then, the gas is conveyed to the exhaust gas having a reduced flow velocity in the exhaust chamber 5 having a marginal capacity, and the slight noise remaining as described above is radiated into the atmosphere from the exhaust port 19 together with the exhaust gas transmitted through the exhaust filter 18. It has become so.

FIG. 2 to FIG. 6 are explanatory views of the configuration of another embodiment of the present invention. Embodiment 2 In FIG. 2, what is different from FIG.
That is, the holding member 13c in which the and the soundproof cover 14 are integrally formed. Holding member 13c having a cover
Is made of the same viscoelastic substance as in the first embodiment. According to the configuration of the second embodiment, since two parts are integrated into a single part, the number of processing steps and the number of assembling steps are reduced, the material cost and the number of steps are reduced, and the manufacturing cost is lower than that of the first embodiment. There are features such as becoming.

Embodiments 3, 4, and 5 FIGS. 3, 4, and 5 show Embodiments 3, 4, and 5, respectively. In FIG. 3, a ring 13d is attached to the entire periphery of the opening end of the holding member 13c having a cover. In the embodiment shown in FIG. 4, the holding member 13c having a cover is provided.
A bone-shaped or plate-shaped insert 13e is embedded.
Further, in the embodiment of FIG. 5, the tip of the cover portion of the holding member 13c is formed in a U-shape, and the deformation preventing member 13g is inserted and supported between the U-shaped portions. For the ring 13d, the insert 13e, and the deformation preventing member 13g, a hard resin or metal that does not change due to external force, temperature change, exhaust pressure, or the like and also has a sound insulating effect is used.

According to the third, fourth and fifth embodiments in which the ring 13d, the insert 13e and the deformation preventing material 13g are provided, the flexibility of the holding member 13c using the viscoelastic substance is reinforced and deformation due to external force or the like is prevented. You. Also, since the cover of the holding member 13c is reinforced, the arrangement of the soundproof chambers 15 accommodating the first and second sound absorbing members 16a and 16b is always kept in the same state. Therefore, the change in the flow velocity of the exhaust gas flowing in the blower room 4 is reduced, and the generation of the secondary noise due to the turbulent flow can be prevented. Therefore, the configurations of Examples 3, 4 and 5 result in a stable suction power.

Embodiment 6 Embodiment 6 of the present invention is shown in FIG. In the sixth embodiment, the integral structure of the second embodiment is further enlarged, and in addition to the holding member 13b and the soundproof cover 14 in FIG.
Holding member 13f in which three parts are integrally formed of a viscoelastic substance
It is provided with. Holding member 13f having such a configuration
As a result, almost the entire outer peripheral surface of the electric blower 12 is covered except for a part of the surface on the fan case 12a side. For this reason, the vibration accompanying the rotation of the electric blower 12 is almost absorbed, and the noise generated in the blower room 4 can be eliminated in principle. Further, since three parts are simplified to one part, the cost can be further reduced as compared with the second embodiment.

In the above embodiment, the case where the exhaust passage is provided on the bottom surface of the main body has been described as an example. However, the present invention can be applied to the case where the exhaust passage is provided on the side surface or both side surfaces. Also, although the ring and insert reinforcing members have been described with reference to FIGS. 3 and 4 of the embodiment, both may be used. Further, the material and the shape are not limited to the examples.

[0030]

As described above, according to the present invention, the rear of the case of the cleaner main body is defined as a half of a blower room accommodating the electric blower and an exhaust room having an exhaust passage and an exhaust port. a pan-bottom shaped holding frame, and the holding member for supporting the front and rear of the electric blower, the exhaust side of the electric blower to the inside of the blower chamber I covering
A cup-shaped soundproof cover forming a soundproof room having an exhaust path, and a sound absorbing member disposed in an air path from the electric blower to the exhaust port, wherein the sound absorbing member is a fan case of the electric blower.
A first sound-absorbing member attached in an annular shape to the step
1 is a cylindrical member placed in a soundproof room in contact with the sound absorbing member.
The second sound absorbing member was provided so as to face the exhaust path of the soundproof room.
A third sound-absorbing member and a main body casing extending to the vicinity of the exhaust port in the exhaust passage.
And a fourth sound absorbing member attached to the inner surface of the
Both the holding frame is supported on the body case, so was supporting the holding member in the holding frame, an electric blower for emitting vibrations and noise, holding frame, it becomes to be supported by the body case via a holding member In addition, it is difficult for noise and vibration to be transmitted to the main body case, so that noise can be reduced. Further, a sound absorbing member arranged in an air passage from the electric blower to the exhaust port , that is,
An annular fan attached to the step of the fan case of the electric blower
1 sound absorbing member, soundproof by contacting the end with the first sound absorbing member
Cylindrical second sound absorbing member arranged in the room, exhaust of soundproof room
The third sound absorbing member provided facing the road and the exhaust passage
Fourth sound absorption attached to the inner surface of the body case up to near the exhaust port
The member can make further lower the noise.

As a result, like the conventional vacuum cleaner of FIG.
A long exhaust flow path for noise prevention is unnecessary,
The size of the dust bag is reduced,
There is no danger of disappointing customers. Furthermore, upper and lower 2 of FIG.
Like a vacuum cleaner in a split-type case, sound-absorbing material
And no rear cover to install it
The total length of the case can be reduced. For this reason,
The main body can be made compact without limiting the occupied volume of the dust collection chamber, etc.
Compact and low noise construction,
An easy-to-use and low-cost vacuum cleaner can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of a first embodiment of the present invention .

FIG. 2 is a diagram illustrating a configuration of a second embodiment of the present invention .

FIG. 3 is a diagram illustrating a configuration of a third embodiment of the present invention .

FIG. 4 is a diagram illustrating a configuration of a fourth embodiment of the present invention .

FIG. 5 is an explanatory diagram of a configuration of a main part according to a fifth embodiment of the present invention .

FIG. 6 is an explanatory diagram of a configuration according to a sixth embodiment of the present invention .

FIG. 7 is a longitudinal sectional view of a conventional vacuum cleaner.

FIG. 8 is a transverse sectional view seen from below.

FIG. 9 is a longitudinal sectional view of another conventional vacuum cleaner.

[Description of Signs] 1 body, 2 case, 4 blower room, 5 exhaust room, 1
1 holding frame, 11b communication hole, 12 electric blower, 12a
Fan case, 13a holding member, 13b holding member,
14 soundproof cover, 14a exhaust path, 15 soundproof room, 1
6a first sound absorbing member, 16b second sound absorbing member, 16b
c Third sound absorbing member, 17 exhaust passage, 17a Fourth sound absorbing member, 19 exhaust port.

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takanobu Kamioka 1728 Komaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd. (56) References JP-A-61-187825 (JP, A) JP-A-5-31050 (JP, A) JP-A-4-364823 (JP, A) JP-A-7-67813 (JP, A) JP-A-5-253113 (JP, A) (58) Int.Cl. ⁷ , DB name) A47L 9/00 103 A47L 9/00

Claims (1)

(57) [Claims] 1. A semi-pan bottom holding frame which defines a rear of a case of a cleaner main body in a blower room accommodating an electric blower, an exhaust passage having an exhaust passage and an exhaust port, and a front and rear of the electric blower. a holding member for supporting the, inside of the blower chamber I covering the exhaust side of the electric blower
A cup-shaped soundproof cover forming a soundproof room having an exhaust path, and a sound absorbing member disposed in an air path from the electric blower to the exhaust port, wherein the sound absorbing member is a fan case of the electric blower. Step
A first sound absorbing member annularly attached to the
Cylindrical shape placed in the soundproof room in contact with the sound absorbing member of
The second sound absorbing member and the exhaust path of the soundproof room.
A third sound absorbing member provided, and an exhaust port provided in the exhaust passage.
A fourth sound absorbing member closely attached to the inner surface of the main body case
And a supporting frame , wherein the holding frame is supported by the main body case, and the holding member is supported by the holding frame.