CN101077285A - Electric vacuum cleaner - Google Patents

Abstract

The invention provides an electric vacuum cleaner with improved suction efficiency. The suction port (65) connected to the suction side of the electric blower and the opening (46) near the suction port (66) are arranged on one side of the main body of the vacuum cleaner. The length of the air path continuous from the suction port (66) to the suction port (65) through the opening (46) and the discharge port can be suppressed, thereby improving the suction efficiency. Make the rear opening (47) be located on the other side inside the main body (1) of the vacuum cleaner. The influence of the suction wind on the rear opening (47) can be suppressed, so that the dust centrifuged by the centrifugal separation unit (36) can be easily guided from the rear opening (47) to the dust collection unit (37).

Description

electric vacuum cleaner

technical field

The present invention relates to an electric vacuum cleaner provided with a dust collecting device for collecting dust sucked by an electric blower.

Background technique

Conventionally, this type of electric vacuum cleaner has a vacuum cleaner main body that accommodates the electric blower. A suction port connected to the suction side of the electric blower is provided in the main body of the vacuum cleaner. A dust collection device for dust collection that can be loaded and unloaded from the installation. Here, the cyclone dust collector has a centrifugal separation part on the upper part of the cup-shaped main body part, and the dust collection part is partitioned inside the said cup-shaped main part. The centrifugal separation part is respectively provided with: a suction port, which sucks dust and air together; an air path, which is a substantially circular centrifugal separation part continuous with the suction port; and a dust collection opening, which is arranged on the suction port. At the downstream end of the air passage, the dust centrifuged from the air through the air passage flows into the dust collecting part together with a part of the air. In addition, an exhaust port leading to the suction side of the electric blower is provided at the rear of the main body, and a pleated filter is detachably provided in the exhaust port. In addition, a communication opening is formed in the upper part of the centrifugal separation part, and a filter is provided in the communication opening. And, in the state of closing the cover body covering the loading part, the communication opening communicates with the communication air passage provided in the cover body, and the downstream side of the communication air passage bends downward and communicates with the suction port (for example, refer to the patent Literature 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 2004-267636 (pages 4-5, FIG. 4 )

However, in the above-mentioned electric vacuum cleaner, the air path from the suction port to the suction port is bent vertically and is long, and there is a problem that the suction efficiency is not high.

Contents of the invention

This invention was made in view of such a problem, and it aims at providing the electric vacuum cleaner which improved suction efficiency.

The electric vacuum cleaner of the present invention is provided with: a dust collecting device arranged on the upstream side of the electric blower for collecting dust inhaled by the electric blower; and an air suction port provided between the dust collecting device and the electric blower One side inside the main body of the vacuum cleaner, and connected to the suction side of the electric blower, the dust collection device has: a centrifugal separation part, which centrifugally separates the dust sucked from the suction port from the air, and the suction port is sucked by the drive of the electric blower Dust; a dust collection part, which accumulates the dust separated by the centrifugal separation part; and an exhaust port, which is connected to the dust collection part and is opposite to the suction port, so that the air after the separated dust is sent to the The suction port flows out, and the centrifugal separation part has: a dust collection opening, which is located on one side of the main body of the vacuum cleaner near the suction port, and communicates with the exhaust port; a filter, which is arranged on the dust collection opening; and a communication opening , which is located on the other side of the main body of the vacuum cleaner, and guides the centrifuged dust to the dust collection part.

According to the present invention, by providing the suction port connected to the suction side of the electric blower and the dust collection opening of the centrifugal separation part located near the suction port on one side of the cleaner main body, it is possible to suppress passage from the suction port through the dust collection opening and the dust collection opening. The length of the air path from the exhaust port to the suction port can improve the suction efficiency. At the same time, by making the communication opening of the centrifugal separation part on the other side of the main body of the vacuum cleaner, the influence of the suction wind on the communication opening can be suppressed, which can The dust centrifuged by the centrifugal separation unit is easily guided from the communication opening to the dust collection unit.

Description of drawings

FIG. 1 is a perspective view showing a part of a dust collector of an electric vacuum cleaner according to an embodiment of the present invention from the front.

Fig. 2 is a longitudinal sectional view showing an electric vacuum cleaner provided with the dust collector of the electric vacuum cleaner.

Fig. 3 is a perspective view showing a cleaner body of the electric vacuum cleaner.

Fig. 4 is a plan view showing a part of the dust collector of the electric vacuum cleaner.

Fig. 5 is a perspective view showing a part of the dust collector of the electric vacuum cleaner from behind.

Fig. 6 is a perspective view showing the electric vacuum cleaner.

Symbol Description

1----The main body of the vacuum cleaner

2----Electric blower

5----Dust collection container as a dust collection device

36----centrifugal separation part

37----dust collection department

46----opening as dust collection opening

47--rear opening as a communication opening

56----Mesh filter as filter

64----exhaust port

65----suction port

66----suction port

Detailed ways

Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 6 .

In Fig. 2 and Fig. 3, 1 is a vacuum cleaner main body, which has: a main body casing 3, which accommodates an electric blower 2; a cover body 4, whose rear portion is pivotally supported on the main body casing 3, It can be opened and closed along the up and down direction; and the dust collection container 5 as a dust collection device is located on the upstream side of the electric blower 2 and can be loaded and unloaded relative to the main body casing 3. The so-called cyclone type electric vacuum cleaner in which the dust inhaled together by the suction wind is centrifugally separated and collected by the dust collection container 5 can move on the ground as the surface to be cleaned.

In the main body case 3, a cord reel 7 is housed below the electric blower 2, and a cord reel 7 is wound on which can supply power to the electric blower 2 and the like from an industrial AC power supply (not shown). The power cord shown in the figure. In addition, a plate-shaped mounting portion 8 is provided on the front portion of the main body case 3 . The mounting portion 8 is a portion that mounts the dust collecting container 5 so as to be detachable, and when the lid body 4 is closed, the dust collecting container 5 can be interposed and fixed between the lid body 4 .

The cover body 4 is provided with a pipe portion 11 at its front portion, and the front portion as the front end portion of the pipe portion 11 becomes a hose connection port 12 for sucking air, and the rear portion as the base end portion of the pipe portion 11 becomes a connection to the collector. The connection opening 13 on the suction side of the dust container 5 fixed to the mounting part 8 .

As shown in FIG. 6 , the base end portion of a flexible and bendable elongated substantially cylindrical dust collection hose 15 communicates with and is connected to the hose connection port 12 . At the front end of the dust collection hose 15, a handy operation unit 16 for selecting the operation mode of the electric blower 2 and the like is provided. A grip portion 17 to be gripped by an operator protrudes from the hand operation portion 16 , and a plurality of operation switches 18 for setting the electric blower 2 and the like to a plurality of operation modes are provided on the grip portion 17 .

In addition, a stretchable, elongated, substantially cylindrical extension tube 21 is detachably communicated and connected to the front end of the hand operation unit 16 . In addition, the suction port body 22 is detachably communicated and connected to the front end of the extension pipe 21, and the suction port body 22 is, for example, a floor brush which is placed on a carpet or the like on an indoor floor and sucks dust on the carpet or the like.

As shown in FIGS. 1 to 5 , the dust collecting container 5 has: a dust collecting container main body 25 as a device main body; The upper part; the bottom cover 27 as the cover of the dust collecting device, which can be opened and closed to be pivotally supported on the bottom of the dust collecting container main body 25; The rear part of the dust container main body 25.

The dust collecting container main body 25 has: a wall portion 31 forming an outer contour from the front portion to both sides of the dust collecting container 5; an upper wall portion 32 as an inclined wall portion closing the upper portion of the wall portion 31 and being inclined. shape continuous; as the partition wall 33 of the partition wall part, it is below the upper wall part 32, continuous in the inside of the wall part 31 and extended to the rear; and a lower rear wall portion 35 as a support wall portion protruding from the inner side of the wall portion 31 at the rear lower portion of the lower wall 34 . And, between the upper part of the upper wall part 32 and the air passage forming body 26, a centrifugal separation part 36 as a cyclone separation part that separates the dust after inhalation from the air is formed, and between the wall part 31, the partition wall 33 and the lower wall 34 A dust collecting part 37 as a first dust collecting part is formed between them, and the dust collecting part 37 accommodates the larger dust after being separated by the centrifugal separation part 36. Between the rear part of wall 34, the negative pressure chamber part 38 that detachable pleated filter part 28 is formed, and between the lower part wall 34 and the lower part rear wall part 35, is formed with the smaller dust as the second set. The fine dust dust collection part 39 of the dust part.

A handle portion 41 for holding the dust collecting container 5 is provided at the front portion of the wall portion 31 . Moreover, the lower end part of the wall part 31 becomes the disposal opening 42 which communicates with the dust collecting part 37 and can be opened and closed by the bottom cover 27. As shown in FIG. The disposal opening 42 can discharge the dust accommodated in the dust collection part 37 and the fine dust collection part 39 to the outside of the dust collection container 5 .

The upper wall portion 32 forms the bottom surface of the centrifugal separation portion 36 and is formed to be inclined downward toward the front side. Thereby, the centrifugal separation part 36 is formed like this: one side, namely, the left side shown in FIG. descending slope. In addition, a circular portion 43 is formed on the upper wall portion 32 along the outer shape of the air passage forming body 26 and is circular in plan view. Along the circumference of the circular portion 43 , an air passage formation can be installed protruding upward. The ribs 44 of the body 26. In addition, on the circular part 43, a circular ventilation opening 45 is perforated in the central part, and at the same time, an opening 46 as a dust collection opening is perforated on one side of the ventilation opening 45, and at the side of the ventilation opening 45 The other side is pierced with a rear end opening 47 as a communication opening.

A dust separating unit 51 as a first dust separating means is provided on the ventilation opening 45 . This dust separation unit 51 has: a frame body 52 formed in a truncated cylindrical shape; Furthermore, the centrifugal separation unit 36 communicates with the negative pressure chamber unit 38 through the opening 52 a and the ventilation opening 45 .

The opening 46 communicates with the centrifugal separation part 36 and the negative pressure chamber part 38 , and is located near the inclined lower end of the upper wall part 32 , that is, at the upstream end of the centrifugal separation part 36 . In addition, the opening 46 is fan-shaped from the front side of the ventilation opening 45 of the circular portion 43 to the rear side of the ventilation opening 45, and is offset to one side inside the main body 1 of the vacuum cleaner, for example, relative to the side along the side of the vacuum cleaner. The center line in the left-right direction of the front-back direction of the main body 1 is the left side shown in FIG. In addition, grid-like ribs 55 partitioning the opening 46 into a grid are formed in the opening 46, and a mesh filter 56 is provided as a second dust separator as a filter.

The rear end opening 47 communicates with the downstream side of the centrifugal separation part 36 and the dust collection part 37, and the rear end opening 47 is located at the lowermost end of the inclination of the upper wall part 32, on the side of the opening 46, and constitutes the downstream end of the centrifugal separation part 36. department. In addition, the rear end opening 47 is offset to the other side in the main body of the vacuum cleaner 1, for example, to the right side shown in FIG. To the other side in the direction intersecting with the suction direction of the electric blower 2. In other words, the rear end opening 47 is located on the opposite side of the opening 46 with respect to the left-right direction of the cleaner main body 1 . In addition, an introduction plate 58 inclined to the front lower portion toward the dust collecting portion 37 side is extended from the rear end portion of the rear end opening 47 .

The partition wall 33 is continuous at a position between the opening 46 and the front side of the rear end opening 47 , and is formed in a slightly inclined shape toward the rear and downward.

The lower wall 34 is formed to be inclined downward from the rear of the partition wall 33 and the rear of the rear end opening 47 . In addition, on the lower wall 34, a plurality of openings 61 serving as communication openings are formed in a lattice shape, and the openings 61 communicate the downstream side of the dust collecting part 37 with the negative pressure chamber part 38. Between these openings 61, Each is provided with a mesh filter 62 as a third dust separator.

The lower rear wall portion 35 is formed in an elongated shape continuous along the left and right sides inside the wall portion 31 , and a mounting wall portion 63 on which the pleated filter portion 28 is mounted is formed horizontally at the upper end. In addition, the horizontally long exhaust port 64 is partitioned by the mounting wall portion 63 , both sides of the rear end portion of the wall portion 31 , and the rear end portion of the upper wall portion 32 . This exhaust port 64 communicates with the rear portion of the negative pressure chamber portion 38, that is, the downstream side, and, in the state where the dust collecting container 5 is installed in the main body casing 3, communicates with the electric blower 2 in a facing manner. The circular suction ports 65 on the suction side face each other.

Here, the suction port 65 is pierced through an unillustrated partition wall portion in front of the electric blower 2, and is located between the main body casing 3 of the vacuum cleaner main body 1 and the dust collection container 5, and is located in the vacuum cleaner main body 1. One side is, for example, located on the left side as shown in FIG. That is, the suction port 65 is located on the same side as the opening 46 with respect to the left-right direction of the cleaner main body 1 , and is located on the opposite side to the rear end opening 47 , that is, on a diagonal side. Therefore, the opening 46, the exhaust port 64, and the intake port 65 are arrange|positioned so that they may line up substantially in a straight line in front view.

On the other hand, in the air passage forming body 26, a substantially circular protruding pipe portion 67 forming a substantially circular suction port 66 is located at the front end, and a scroll portion 68 is continuously formed at the rear end portion of the protruding pipe portion 67, The scroll portion 68 is spirally formed in a right-handed direction in a plan view, and a circular accommodating protrusion 69 in a plan view is formed at a central portion of the scroll portion 68 .

The protruding pipe portion 67 is a portion that communicates with the hose connection port 12 through the connection opening 13 in a state where the dust collecting container 5 is mounted in the main body case 3 . Therefore, the suction port 66 is located at the approximate center of the cleaner body 1 in the left-right direction, and serves as an opening for sucking dust together with air when the electric blower 2 is driven, and the opening 46 is located near the downstream side of the suction port 66 .

The scroll portion 68 is formed to have an arc shape protruding upward in cross-section, and the vertical dimension on the downstream side is gradually smaller than that on the upstream side of the protruding pipe portion 67 , and the end portion on the downstream side enters the protruding pipe portion 67 . the lower part. Therefore, the swirl air passage portion W, which is an air passage partitioned between the scroll portion 68 and the dust collecting container main body 25 , is configured such that the cross-sectional area on the upstream side is smaller than the cross-sectional area on the downstream side.

The accommodating protrusion 69 is formed so as to fit into the upper end portion of the frame body 52 of the dust separating unit 51 .

In addition, the front end portion of the bottom cover 27 is rotatably pivotally supported on both side portions of the wall portion 31 of the dust collecting container main body 25 . And this bottom cover 27 can be opened by operating the button 71 provided in the handle part 41 of the dust collecting container 5. As shown in FIG.

In addition, the pleated filter part 28 has: the pleated filter body 73 as the 4th dust separator; 28 is mounted to close the exhaust port 64.

The pleated filter body 73 is formed such that the crests and troughs of the pleats in the vertical direction alternately continue in the left-right direction of the vacuum cleaner main body 1, and a dust removal unit is provided at the rear of the pleated filter body 73. 74.

The dust removal unit 74 is configured to include: a not-shown reciprocating body capable of reciprocating in the left-right direction of the cleaner main body 1; On the pleated peaks of the pleated filter body 73, by reciprocating the reciprocating body along the left and right, the protrusions 75 move over the pleated peaks, thereby applying vibration to the pleated filter body 73 to make the adhesion The dust on the pleated filter body 73 falls into the fine dust collection part 39 .

In addition, the reciprocating body is controlled to reciprocate for a predetermined time, for example, when the drive of the electric blower 2 is stopped.

Next, the operation of the above-mentioned one embodiment will be described.

First, the lid body 4 is rotated upward to open, and the dust collecting container 5 with the air passage forming body 26 mounted on the upper wall portion 32 and the pleated filter portion 28 mounted on the exhaust port 64 is placed. On the mounting portion 8 , in this state, the lid body 4 is rotated downward, and the dust collecting container 5 is sandwiched between the lid body 4 and the mounting portion 8 .

At this time, the suction port 66 of the dust collecting container 5 communicates with the connecting opening 13 of the pipe portion 11 of the cover body 4 on the same axis, and the exhaust port 64 of the dust collecting container 5 and the air outlet installed on the exhaust port 64 The pleated filter unit 28 faces the air inlet 65 of the electric blower 2 .

Next, on the hose connection port 12, the dust collection hose 15, the extension pipe 21 and the suction port body 22 are sequentially communicated and connected, and an unshown power cord is drawn out from the main body case 3 and connected to the industrial On the AC power supply, operate the desired operation switch 18 under the state of holding the grip part 17, so that the electric blower 2 is driven by the desired operation mode, and the suction port body 22 is brought into contact with the ground and walks forward and backward, and the air on the ground is drawn from the front end side. Dust is inhaled with air.

The sucked air becomes the suction wind, and is sucked into the centrifugal separation unit 36 from the suction port 66 of the dust collection container 5 via the suction port body 22, the extension pipe 21, the dust collection hose 15, the hose connection port 12 and the connection opening 13. .

Most of the suction wind flows into the negative pressure chamber part 38 through the opening 46 in a straight line. During this passage, the dust is collected by the mesh filter 56, and the remaining part is circular along the periphery of the dust separation part 51. It flows into the swirling air passage part W.

At this time, a part of the suction wind flows into the negative pressure chamber part 38 through the opening part 52a. During this passage, the dust is collected by the mesh filter 53, and the cross-sectional area of the swirling air passage part W increases as it passes through the downstream. And narrow, so the remaining part can ensure the flow rate all the way to the downstream end, flow to the rear end opening 47 and flow into the dust collecting part 37 from this rear end opening 47 .

Among the dust contained in the suction wind flowing into the dust collecting part 37, the larger coarse dust falls into the dust collecting part 37 as it is and is collected, and the smaller fine dust flows into the negative pressure through the opening 61 when the suction wind flows into the dust collecting part 37. Chamber portion 38 is trapped by mesh filter 62 .

When the suction wind after confluence in the negative pressure chamber part 38 passes through the pleated filter body 73 of the pleated filter part 28, in the pleated filter body 73, the air that is not filtered by each mesh is collected. The fine dust collected by the device 53, 56, 62.

After the suction wind passing through the pleated filter body 73 is discharged to the outside of the dust collecting container 5 from the exhaust port 64, it is sucked into the electric blower 2 from the suction port 65, and becomes exhaust air through the electric blower 2. The wind is exhausted to the outside of the cleaner main body 1 through unillustrated exhaust holes formed in the main body casing 3 .

When the cleaning is completed and the operator operates the operation switch 18 to stop the drive of the electric blower 2, the reciprocating body installed in the pleated filter part 28 reciprocates in the left and right direction, whereby the protrusion 75 makes the filter attached to the pleated filter part 28 reciprocate. The fine dust on the filter body 73 falls from the pleated filter body 73 into the fine dust collecting part 39 .

Thereafter, the operator rotates the cover body 4 upward to open, and after detaching the dust collecting container 5 from the main body casing 3, presses the button 71 on, for example, a dustbin or the like, thereby opening the bottom cover 27, and disposing of The dust in the dust collecting part 37 and the dust in the fine dust collecting part 39 are discarded.

Moreover, the air passage forming body 26 is detached from the dust collecting container main body 25, and each mesh filter 53, 56 etc. are cleaned.

Furthermore, after returning the air passage forming body 26 and the bottom cover 27 to their original states, they are again attached to the main body case 3 for use.

As described above, according to the above-mentioned one embodiment, the cross-sectional area of the swirling air passage portion W is made smaller on the downstream side than on the upstream side, whereby the wind speed of the suction wind passing through the swirling air passage portion W can be ensured up to the downstream side. , to maintain the inertia that the dust has, so that the dust sucked from the suction port 66 and centrifugally separated by the centrifugal separation part 36 can be reliably accumulated in the dust collection part 37 from the rear end opening 47 .

That is, since most of the suction wind sucked into the centrifugal separation part 36 from the suction port 66 flows into the negative pressure chamber part 38 in a straight line through the opening 46, the suction wind swirling in the swirling air path part W is less, and the downstream Therefore, by reducing the cross-sectional area on the downstream side, a sufficient wind speed for guiding dust to the rear opening 47 can be ensured, and the dust can be reliably guided into the dust collecting portion 37 .

In addition, the cross-sectional area of the swirl air passage portion W can be easily reduced from the upstream side to the downstream side by reducing the height dimension of the air passage forming body 26 from the upstream side to the downstream side.

Furthermore, by making the air passage forming body 26 detachable from the dust collecting container main body 25, the sweepability of the mesh filters 53, 56, etc. can be improved.

And, by setting the mesh filter 56 that makes the air pass to the electric blower 2 near the suction port 66, the mesh filter 56 can be positioned at a position where the wind speed of the suction wind is fast and the dust is difficult to fall, and the mesh filter 56 can be prevented from falling. The filter 56 is quickly blocked, and at the same time, the short-distance (shortcut) flow of the suction wind leading to the negative pressure chamber part 38 from the mesh filter 53 of the dust separation part 51 can be suppressed, and the flow in the rotating air passage part W can be ensured. The rotating suction wind can guide the dust into the dust collecting part 37 more reliably.

In addition, by providing the suction port 65 connected to the suction side of the electric blower 2 and the opening 46 near the suction port 66 on one side of the cleaner main body 1, it is possible to suppress the flow from the suction port 66 through the opening 46 and the exhaust port. 64 is continuous to the length of the air path of the suction port 65, which can improve the suction efficiency. At the same time, by making the rear opening 47 located on the other side of the main body 1 of the vacuum cleaner, the influence of the suction wind on the rear opening 47 can be suppressed, and the suction efficiency can be improved. The dust centrifuged by the centrifugal separation unit 36 is easily guided from the rear end opening 47 to the dust collection unit 37 .

That is, by providing the suction port 65 on the same side as the opening 46, the suction wind can be made to flow in a substantially straight line from the suction port 66 through the opening 46 and the exhaust port 64 to the suction port 65, so that it can be suppressed from being circumferentially shaped. Due to the air volume of the suction air flowing to the rear opening 47 , the fine dust can be mainly collected by the mesh filters 53 and 56 , and only relatively large dust can be accumulated in the dust collecting part 37 .

As a result, the inflow of fine dust into dust collecting part 37 can be suppressed, and the mesh filter 62 located in dust collecting part 37 can be suppressed from being clogged with fine dust.

Moreover, by making the suction port 66 and the rear end opening 47 located at a diagonal with respect to the suction direction, the suction wind flows into the dust collecting portion 37 in a direction opposite to the direction toward the suction side of the electric blower 2, so that the air can be more reliably Clogging of the mesh filter 62 by fine dust is suppressed.

Furthermore, since the opening 46 faces the suction port 66 in an oblique shape by forming the upstream side of the centrifugal separation part 36 with an inclination rising from the upstream side to the downstream side, the opening 46 faces the suction port 66 in an inclined manner. Compared with the case where it is arranged horizontally, the suction wind sucked from the suction port 66 is easy to flow into the opening 46 in a straight line. The inclination that the downstream side descends can make use of this inclination to reliably drop the dust toward the rear end opening 47 by its own weight.

Moreover, in the said one Embodiment, the structure of the downstream side part including the dust collecting part 37 of the dust collecting container 5 is not limited to the said structure.

In addition, the cross-sectional shape of the air passage forming body 26 can be set arbitrarily.

Furthermore, as an electric vacuum cleaner, it is not limited to the tank type (canister), even if it is a vertical type in which the suction port body 22 is directly formed on the bottom of the vacuum cleaner body 1, and even if the vacuum cleaner body 1 and the suction port body 22 are integrated Self-propelled electric vacuum cleaners or portable vacuum cleaners can also be applied correspondingly.

Claims (2)

1. An electric vacuum cleaner, characterized in that the electric vacuum cleaner has: the main body of the vacuum cleaner, which houses the electric blower; a dust collecting device, which is arranged on the upstream side of the electric blower of the vacuum cleaner main body, for collecting dust sucked by the electric blower; and an air suction port, which is provided on one side of the main body of the vacuum cleaner between the dust collecting device and the electric blower, and connected to the suction side of the electric blower, The dust collector has: a suction port, which sucks in dust through the drive of the electric blower; a centrifugal separation part that centrifugally separates the dust inhaled from the suction port from the air; a dust collection section that accumulates the dust separated by the centrifugal separation section; and an exhaust port, which is connected to the dust collecting part and is opposite to the air intake port, so that the air separated from the dust flows out to the air intake port, The centrifugal separation unit has: a dust collection opening, which is located on one side of the main body of the vacuum cleaner near the suction port and communicates with the exhaust port; a filter disposed on the dust collection opening; and The communication opening is located on the other side of the main body of the vacuum cleaner, and guides the centrifuged dust to the dust collecting part. 2. The electric vacuum cleaner according to claim 1, characterized in that, One side of the centrifugal separation unit is formed with a slope rising from the upstream side to the downstream side, and the other side is formed with a slope falling from the upstream side to the downstream side.

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