JP2011041766A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the cleaning property of vacuum cleaner by storing the compressed dust in the dust case after having centrifuged dust efficiently. <P>SOLUTION: A first cyclone 502 includes a first inlet port 503 for taking in dust-including air, a first rotary part 504 in which dust-including air introduced from the first inlet port 503 swirls, a truncated cone-shaped first conical section 54a which forms a part of the side wall of the first rotary part 504, a primary opening 505 formed at a bottom end of the first conical section 54a, a primary dust case 506 arranged at the lower part of the first conical section 54a, and a first outlet 507 which discharges air from the first rotary 504. In addition, the zero-order opening 514 is formed in the part of the side wall of the first rotary part 504, and the zero-order dust case 515 is arranged in the radial direction outside of the zero-order opening 514 to accumulate the first dust. Furthermore, the upper end of primary dust case 506 is extended to the position higher than the first opening 505, to compress the second dust that is lighter than the first dust accumulated in the upward space of the primary dust case 506. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner employing a cyclone method.

  A housing having a means for taking up fluid containing particulates and a means for discharging the cleaned fluid, and having means for generating a primary vortex in the incoming fluid, each said housing being connected to the means for collecting particulates 2. Description of the Related Art An apparatus for separating fine particles from a fluid flow is known that includes a separation region including one separation chamber and a second separation chamber, and a connecting means for generating a secondary vortex in the second separation chamber (for example, a patent) Reference 1).

Japanese translation of PCT publication No. 2002-503541

  In the prior art shown in Patent Document 1, since the dust separated from the air by the inertial force was collected by gravity along the wall surface of the swivel part, particularly cotton dust or the like is not compressed in the dust case, There was a problem of re-scattering due to the inflow air flow into the dust case. In addition, there is a problem that it is difficult to collect film-like waste and hair, which has a density significantly different from that of cotton waste, by centrifugal separation with the cotton waste.

  The present invention has been made in order to solve the above-described problems, and is an electric vacuum cleaner having a good cleaning property in which dust is compressed and accommodated in a dust case after being efficiently centrifuged. The purpose is to obtain.

  The vacuum cleaner according to the present invention includes a suction port for sucking dust-containing air from the outside, a communication air passage having one end connected to the suction port, one end connected to the other end of the communication air passage, and a first cyclone A first cyclone having a first inlet for taking in dust-containing air from the communication air passage side, a first turning section for turning dust-containing air introduced from the first inlet, and a first turning section A first conical portion that forms a part of the side wall surface, the diameter of which decreases as it approaches the tip, has a substantially conical shape, with the tip cut off, and a primary opening formed at the lower end of the first conical portion And a primary dust case provided at a lower portion of the first conical portion, and a first outlet for discharging air from the inside of the first swivel portion, and forming a zero-order opening in a part of the side wall surface of the first swivel portion And providing a zero-order dust case for depositing the first dust radially outside the zero-order opening, In order to compress the second dust that is lighter than the first dust accumulated in the upper space of the secondary dust case, the upper end of the primary dust case extends above the primary opening and the inner bottom surface of the primary dust case Z / Q is 3 or more and less than 11 for the distance Z (mm) between the first opening and the opening end of the primary opening and the air volume Q (m3 / min) flowing into the first cyclone.

  According to the present invention, after the waste is efficiently centrifuged, the dust is compressed and accommodated in the dust case, and the cleaning property is improved.

It is a figure which shows schematic structure of the vacuum cleaner which concerns on this invention. It is the schematic diagram which shows the cross section which looked at the main body 5 of the vacuum cleaner shown in FIG. 1 from upper direction. It is aa sectional drawing of the main body 5 shown in FIG. It is bb sectional drawing of the main body 5 shown in FIG. It is a perspective view which shows the external appearance of the cyclone dust collection part 540 which is the principal part of the main body 5 of the vacuum cleaner shown in FIG. It is a front view of the cyclone dust collection part 540 of the vacuum cleaner which concerns on this invention. It is a rear view of the cyclone dust collection part 540 of the vacuum cleaner which concerns on this invention. It is a top view of the cyclone dust collection part 540 of the vacuum cleaner which concerns on this invention. It is AA arrow sectional drawing of Embodiment 1 of the vacuum cleaner which concerns on this invention (the 1). It is BB arrow sectional drawing of Embodiment 1 of Embodiment 1 of the vacuum cleaner which concerns on this invention. It is CC sectional view taken on the line of FIG. 8 in Embodiment 1 of the vacuum cleaner which concerns on this invention. It is DD sectional view taken on the line of FIG. 7 in Embodiment 1 of the vacuum cleaner which concerns on this invention. It is EE arrow sectional drawing of FIG. 7 in Embodiment 1 of the vacuum cleaner which concerns on this invention. It is FF arrow sectional drawing of FIG. 7 in Embodiment 1 of the vacuum cleaner which concerns on this invention. It is a disassembled perspective view of the cyclone dust collection part 540 in Embodiment 1 of the vacuum cleaner which concerns on this invention. It is a perspective view of the cyclone dust collection part 540 at the time of garbage disposal in Embodiment 1 of the vacuum cleaner which concerns on this invention. It is a perspective view when the dust case which shows Embodiment 1 of the vacuum cleaner which concerns on this invention is removed from the cone part. It is AA arrow sectional drawing when the dust case which shows Embodiment 1 of the vacuum cleaner which concerns on this invention is removed from the cone part. It is AA arrow sectional drawing of Embodiment 1 of the vacuum cleaner which concerns on this invention (the 2). It is AA arrow sectional drawing of Embodiment 1 of the vacuum cleaner which concerns on this invention (the 3). It is AA arrow sectional drawing of Embodiment 1 of the vacuum cleaner which concerns on this invention (the 4). It is AA sectional drawing which shows the structure of the 1st cyclone 502 in Embodiment 2 of the vacuum cleaner which concerns on this invention (the 1). It is AA sectional drawing which shows the structure of the 1st cyclone 502 in Embodiment 2 of the vacuum cleaner which concerns on this invention (the 2). It is AA sectional drawing which shows the structure of the 1st cyclone 502 in Embodiment 2 of the vacuum cleaner which concerns on this invention (the 3). It is AA sectional drawing which shows the structure of the 1st cyclone 502 in Embodiment 2 of the vacuum cleaner which concerns on this invention (the 4). It is a graph which shows the relationship between ratio Z / Q of distance Z and the air volume Q, and the amount of cotton dust collection. It is a graph which shows the relationship between ratio Ad / Q of the opening area Ad of the primary opening part 505, and the air volume Q, and the amount of cotton dust collection.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a schematic configuration of a vacuum cleaner according to the present invention.
As shown in FIG. 1, the vacuum cleaner 100 includes a suction port 1, a suction pipe 2, a connection pipe 3, a retractable suction hose 4, and a cyclone-type vacuum cleaner body 5. The suction port 1 sucks in dust and air containing dust on the floor. One end of a straight cylindrical suction pipe 2 is connected to the outlet side of the suction port 1. A handle is provided at the other end of the suction pipe 2, and one end of the connection pipe 3 bent slightly in the middle is connected. One end of a bendable suction hose 4 is connected to the other end of the connection pipe 3. Furthermore, the main body 5 is connected to the other end of the suction hose 4.
The suction port 1, the suction pipe 2, the connection pipe 3, and the suction hose 4 constitute a part of a flow path for allowing dust-containing air to flow from the outside to the inside of the main body 5.
The connection pipe 3 constitutes a communication air passage.

FIG. 2 is a schematic view showing a cross section of the main body 5 of the electric vacuum cleaner shown in FIG. 1 as viewed from above. 3 is an aa cross-sectional view of the main body 5 shown in FIG. 2, and FIG. 4 is a bb cross-sectional view of the main body 5 shown in FIG.
As shown in FIGS. 2 to 4, the main body 5 of the vacuum cleaner 100 includes a suction air passage 530, a cyclone dust collecting unit 540, an exhaust air passage 550, a filter 560, a motor 570 and an exhaust port 580. Is provided. In addition, a wheel 590, a cord reel (not shown), and the like are provided at the rear portion of the main body 5. The cyclone unit 520 includes a first cyclone 502 and a second cyclone 508 arranged in parallel with the first cyclone 502.
A primary dust case 506 is connected to the end of the first cyclone 502, and a secondary dust case 512 is connected to the end of the second cyclone 508. The primary dust case 506 and the secondary dust case 512 are accommodated in the dust case 501.
Further, an exhaust air passage 550 is provided in the upper part of the second cyclone 508, and the exhaust air passage 550, the filter 560, the motor 570, and the exhaust port 580 are sequentially connected to constitute an exhaust passage.

  FIG. 5 is a perspective view showing an appearance of a cyclone dust collecting unit 540 which is a main part of the main body 5 of the vacuum cleaner shown in FIG. 6 is a front view of the cyclone dust collector 540, FIG. 7 is a rear view of the cyclone dust collector 540, and FIG. 8 is a plan view of the cyclone dust collector 540. 9 is a cross-sectional view taken along the line AA in FIG. 7, FIG. 10 is a cross-sectional view taken along the line BB in FIG. 7, FIG. 11 is a cross-sectional view taken along the line CC in FIG. DD is a sectional view taken along the arrow D, FIG. 13 is a sectional view taken along the line EE in FIG. 7, and FIG. 14 is a sectional view taken along the line FF in FIG. FIG. 15 is an exploded perspective view of the cyclone dust collecting unit 540.

Next, the structure of the vacuum cleaner cyclone dust collection part 540 is demonstrated using FIGS.
The cyclone dust collecting unit 540 of the electric vacuum cleaner 100 includes a first cyclone 502 and a second cyclone 508 provided in parallel with the first cyclone 502. Further, an exhaust air passage is provided in the upper part of the first cyclone 502, and this exhaust air passage is continuously connected to an intake air passage provided in the upper part of the second cyclone 508.
Note that the area of the 0th-order opening described later is made as small as possible so that the airflow for compression in the primary dust case is not disturbed.

The first cyclone 502 has a first inlet 503 for taking in dust-containing air, a first turning section 504 through which dust-containing air introduced from the first inlet 503 through an air passage is turned, and a side wall surface of the first turning section 504. The first conical portion 504a, which is partly formed and has a substantially conical shape with a diameter that decreases toward the tip, is cut off, and a primary opening 505 formed at the lower end of the first cone 504a. And a primary dust case 506 provided at the lower portion of the first conical portion 504a, and a first outlet 507 for discharging air from the first turning portion 504.
A zero-order opening 514 is formed in a part of the side wall surface of the first turning portion 504, and a zero-order dust case 515 is provided outside the zero-order opening 514 in the radial direction. In addition, the upper end of the primary dust case 506 extends above the primary opening 505 in the space above the primary dust case 506 in order to compress the dust.

A horizontal flange 517a extending radially inward is provided at the upper end portion of the primary dust case 506, and the primary dust case 506 and the first conical portion 504a are configured to be detachable.
17 and 18 show a state where the primary dust case and the secondary dust case are integrally removed from the first conical portion 504a and the second conical portion 510a.
This facilitates the discharge of the dust compressed above the primary dust case 506.
Further, as shown in FIG. 9, the first outlet 507 is provided in a substantially cylindrical hollow cylinder 507a and a hollow cone 507b which is provided at the lower part of the hollow cylinder 507a and decreases in diameter as it approaches the tip (downward in FIG. 9). The hollow cylinder 507a and the hollow cone 507b are provided with a large number of apertures.

Further, as shown in FIG. 19, an angle R may be provided between the radially outer end of the horizontal flange 517a and the inner peripheral wall surface of the primary dust case 506.
This facilitates the discharge of the dust compressed above the primary dust case 506.

In addition, as shown in FIG. 20, a rib A518 may be provided from the upper part of the inner peripheral wall surface of the primary dust case 506 toward the inside in the radial direction.
This creates a starting point for compression by letting the trash stay. Moreover, it is possible to suppress the re-scattering (backflow) of the waste due to the effect of holding the waste.

Further, as shown in FIG. 21, ribs C520 may be provided on the outer peripheral wall of the first conical portion 504a so as to be covered with the primary dust case 506 toward the radially outer side.
This creates a starting point for compression by letting the trash stay. Moreover, it is possible to suppress the re-scattering (backflow) of the waste due to the effect of holding the waste.
Further, the opening area of the zero-order opening may be larger than the opening area Ad of the primary opening.
Thereby, coarse dust can be collected reliably.

Next, the operation of the vacuum cleaner will be outlined with reference to FIGS.
When power is supplied to a blower (not shown) by the operation of the operation unit by the user and the vacuum cleaner starts driving, dust-containing air is sucked from the suction port 1 by the suction force of the motor 570 of the blower, and the arrow is drawn through the suction pipe 2. After flowing through the suction path in the order of the connection pipe 3 and the suction hose 4 as indicated by Q, the suction air path 530, the cyclone dust collecting part 540, the exhaust air path 550, the filter 560, and the motor 570 are sequentially passed through the exhaust port 580. Exhausted from.
In this process, coarse dust in the dust-containing air is collected by the first cyclone 502 and the second cyclone 508 constituting the cyclone dust collection unit 540, and further fine dust is collected by the filter 560.
It flows into the first inlet 503 of the first cyclone 502. The dust-containing air that has flowed into the first inlet 503 flows almost horizontally along the side wall of the cylindrical first cylindrical portion, so that it becomes a swirling airflow. The forced vortex region near the central axis and the quasi-free vortex region on the outer peripheral side thereof It flows downward due to its path structure and gravity. At this time, since centrifugal force acts on dust, for example, waste, which has a relatively large size and specific gravity (hereinafter referred to as garbage A), such as hair, bag, sand (relatively large sand), etc., is the zero-order dust case. It is pressed against the inner wall of 515, separated from the intake air, captured and deposited in the zero-order dust case 515.

Further, the remaining dust travels from the first cylindrical portion 504b to the first conical portion 504a in a descending swirling flow. As the swirl flow that has advanced to the first conical portion 504a is lowered, the diameter of the air passage is reduced, and the swirl speed is increased. As a result, “cotton litter and fine sand litter (hereinafter referred to as litter B)” that is lighter than litter A, easy to ride in the airflow, and bulky is driven above the primary dust case by wind pressure, and is deposited and compressed there. The
The air from which the dust A and the dust B have been removed rises along the central axis of the cylinder of the first cyclone 502, passes through the first swivel part 504, and the first conical part 507 a of the first outlet 507 and the first hole. The gas is exhausted through a hole in one cylindrical portion 507b. The exhausted air is introduced into the second inlet 509 of the second cyclone 508 through the upper air passage, and then descends and sequentially passes through the second conical portion 510a of the second turning portion 510 and the secondary dust case 512. Then, it rises and is exhausted from the second outlet 513 to the outside.
In this case, since the diameter of the second cone part 510a is smaller than the diameter of the first cone part 504a, the centrifugal force of the second cyclone 508 is larger than the centrifugal force of the first cyclone 502. This makes it possible to collect fine dust that could not be collected by the first cyclone 502 in the secondary dust case 512 of the second cyclone 508. Furthermore, the opening area of the second outlet 513 is made smaller than the opening area of the second inlet 509. Thereby, since the speed of the exhaust flow at the second outlet 513 is increased, the inflow of airflow into the secondary dust case 512 is reduced, and the re-scattering of fine dust accumulated in the secondary dust case 512 can be suppressed. It becomes.
Moreover, the primary dust case and the secondary dust case are provided as an integral part, and the capacity of the primary dust case is larger.
As a result, the parts can be simplified, and the dust collected in the primary dust case is covered, so that it can be used for a long time without lowering the air volume.

Further, as shown in FIG. 9, the distance between the inner bottom surface of the primary dust case 506 and the opening end of the primary opening 505 is Z (mm), and the amount of air flowing into the first cyclone 502 is Q (m3 / min). . FIG. 26 is a graph showing the relationship between the ratio Z / Q between the distance Z and the air volume Q and the amount of collected cotton dust. In FIG. 26, the solid line is a graph showing the amount of collected cotton dust when the air volume Q is 1.5 m3 / min, and the broken line shows the amount of collected cotton dust when the air volume Q is 0.75 m3 / min. It is a graph. It can be seen from both graphs that the amount of collected cotton dust can be collected sufficiently if the value of Z / Q is 3 or more and less than 11.
When the value of Z / Q is smaller than 3, the air volume of the airflow flowing into the primary dust case 506 is reduced, so that the compression force becomes weak. In addition, when the value of Z / Q is 11 or more, the wind speed of the airflow flowing into the primary dust case 506 becomes small, and the compression force becomes weak.

As shown in FIG. 9, the first outlet 507 is provided with a hollow cone 507b whose diameter decreases as it approaches the tip of the hollow cylinder 507a, and a member in which a large number of openings are provided in the hollow cylinder 507a and the hollow cone 507b. Consists of.
Thereby, the dust passing from the first cyclone 502 to the second cyclone 508 is classified by the mesh, thereby avoiding clogging at the air passage between the first cyclone 502 and the second cyclone 508 and the second inlet 509. In addition, the upward flow can be smoothly discharged by the conical mesh, and the pressure loss can be suppressed. Further, when a very long hair cannot be collected in the zero-order dust case 515, the hair wraps around the conical hollow cone 507b and is easy to remove.

Further, the opening area of the primary opening 505 in FIG. 9 is Ad (mm 2), and the amount of air flowing into the first cyclone 502 is Q (m 3 / min). FIG. 27 is a graph showing the relationship between the ratio Ad / Q between the opening area Ad of the primary opening 505 and the air volume Q and the amount of collected cotton dust. In FIG. 27, the solid line is a graph showing the amount of collected cotton dust when the air volume Q is 1.5 m 3 / min, and the broken line shows the amount of collected cotton dust when the air volume Q is 0.75 m 3 / min. It is a graph. From both graphs, it can be seen that if the Ad / Q is 300 or more and less than 650, the waste B can be sufficiently collected.
When the value of Ad / Q is smaller than 300, the air volume of the airflow flowing into the primary dust case 506 is reduced, so that the compression force becomes weak. In addition, when the value of Ad / Q is 650 or more, the wind speed of the airflow flowing into the primary dust case 506 becomes small, so the compression force becomes weak.

From the above, the large radial force (centrifugal force, air resistance force and wall resistance force) acting on “garbage (garbage A) with relatively large size and specific gravity such as hair, bag, sand (relatively large sand)” Collecting “Cotton waste and fine sand litter (garbage B)” that is easier to get in the airflow than Garbage A while collecting Garbage A in a zero-order dust case. In addition, bulky garbage B can be compressed above the primary dust case.
The horizontal flange 517a may be formed of an elastic material.
Thus, by applying vibration from the outside, the elastic body moves due to the vibration, so that the dust is separated from the primary dust case 506, and the dust is easily discarded.

Embodiment 2. FIG.
In the first embodiment, the modification has been described in the case where the upper end portion of the primary dust case 506 is provided with a horizontal flange extending radially inward.
In the second embodiment, a case where the horizontal flange is further extended obliquely downward will be described.
FIG. 22 is an AA cross-sectional view showing the configuration of the first cyclone 502 of the vacuum cleaner body according to the present invention.
As shown in FIG. 22, an oblique flange 517b having a shape in which the horizontal flange 517a extends obliquely downward from the radially inner end along the shape of the first conical portion 504a is provided.
This creates a starting point for compression by letting the trash stay. Moreover, it becomes possible to suppress the re-scattering (backflow) of the waste by the effect of holding the waste.

Further, as shown in FIG. 23, a rib B519 may be provided from the outer peripheral wall surface of the oblique flange 517b toward the radially outer side.
This creates a starting point for compression by letting the trash stay. Moreover, it becomes possible to suppress the re-scattering (backflow) of the waste by the effect of holding the waste.

Further, as shown in FIG. 24, a bag member 521 made of a soft material such as a hollow cloth having one end connected to the tip of the horizontal flange 517a and the other end connected to the tip of the oblique flange 517b may be provided. Good.
Thereby, when the vacuum cleaner is driven, the bag member 521 is pressed against the oblique flange 517b by the swirling flow, but when the operation is stopped, the bag member 521 hangs down by its own weight. As a result, the bag member 521 has a force that sandwiches the waste B volume in the upper part of the primary dust case 506 in the horizontal direction. Therefore, it is possible to suppress the downward movement of the garbage B.

As shown in FIG. 25, at least one of the horizontal flange 517a and the oblique flange 517b may be formed of an elastic material.
As a result, the vibration associated with the operation at the time of waste disposal is given from the outside, and the elastic body moves due to the vibration, so that the dust is separated from the primary dust case 506, and the waste is easily discarded.
In the above embodiment, the second cyclone is provided. However, only the first cyclone or a plurality of cyclones (second cyclone, third cyclone,...) May be provided.
In the present embodiment, the canister type vacuum cleaner has been described, but it is needless to say that the present invention is not limited to this.

  DESCRIPTION OF SYMBOLS 1 Suction inlet, 2 Suction pipe, 3 Connection pipe, 4 Suction hose, 5 Vacuum cleaner main body, 100 Vacuum cleaner, 501 Dust case, 502 1st cyclone, 503 1st inlet, 504 1st turning part, 504a 1st cone Part, 504b first cylindrical part, 505 primary opening, 506 primary dust case, 507 first outlet, 507a hollow cylinder, 507b hollow cone, 508 second cyclone, 509 second inlet, 510 second swivel part, 510a second Conical part, 511 Secondary opening part, 512 Secondary dust case, 513 Second outlet, 514 0th order opening part, 515 0th order dust case, 516 Dust case cover, 517a Horizontal flange, 517b Diagonal flange, 518 Rib A, 519 Rib B, 520 Rib C, 521 Bag member, 530 Suction air passage, 540 Cyclone dust collecting unit, 550 exhaust air passage, 560 filter, 570 motor, 580 exhaust port, 590 wheels.

Claims (14)

A suction port for sucking dust-containing air from the outside, a communication air passage having one end connected to the suction port, and a main body having one end connected to the other end of the communication air passage and having a first cyclone. ,
The first cyclone includes a first inlet for taking in dust-containing air from the communication air passage side, a first turning section for turning dust-containing air introduced from the first inlet, and a side wall surface of the first turning section. A first conical portion having a substantially conical shape with the tip cut off, a primary opening formed at the lower end of the first conical portion, A primary dust case provided at a lower portion of the first conical portion, and a first outlet for discharging air from the inside of the first swivel portion,
A zero-order opening is formed in a part of the side wall surface of the first swivel portion, a zero-order dust case for depositing the first dust is provided outside the zero-order opening in the radial direction, and the primary dust case In order to compress the second dust that is lighter than the first dust accumulated in the upper space, the upper end of the primary dust case extends to above the primary opening,
Z / Q was set to 3 or more and less than 11 for the distance Z (mm) between the inner bottom surface of the primary dust case and the opening end of the primary opening and the air volume Q (m3 / min) flowing into the first cyclone. An electric vacuum cleaner. A suction port for sucking dust-containing air from the outside, a communication air passage with one end connected to the suction port, a suction hose with one end connected to the other end of the communication air passage, and the other end of the suction hose A main body connected and having a first cyclone,
The first cyclone has a first inlet for taking in the dust-containing air from the suction hose, a first turning section in which the dust-containing air introduced from the first inlet turns, and a part of the side wall surface of the first turning section The first conical portion having a substantially conical shape with the diameter reduced as it approaches the tip, and the tip cut off, a primary opening formed at the lower end of the first cone, and the first A primary dust case provided at a lower portion of one conical portion, and a first outlet for discharging air from the inside of the first swivel portion,
A zero-order opening is formed in a part of the side wall surface of the first swivel portion, a zero-order dust case for depositing the first dust is provided outside the zero-order opening in the radial direction, and the primary dust case In order to compress the second dust that is lighter than the first dust accumulated in the upper space, the upper end of the primary dust case extends to above the primary opening,
The vacuum cleaner characterized in that Ad / Q is 300 or more and less than 650 with respect to the opening area Ad (mm2) of the primary opening.   3. A horizontal flange extending in a radially inward direction is provided at an upper end portion of the primary dust case, and the primary dust case and the first conical portion are configured to be detachable. Electric vacuum cleaner.   The electric vacuum cleaner according to claim 3, wherein an angle R is provided between a radially outer end of the horizontal flange and an inner peripheral wall surface of the primary dust case.   The vacuum cleaner according to claim 3 or 4, wherein a rib is provided radially inward from an upper part of an inner peripheral wall surface of the primary dust case.   The vacuum cleaner according to any one of claims 3 to 5, wherein a rib is provided radially outward in a portion of the outer peripheral wall of the first conical portion that is covered with the primary dust case.   The diagonal flange of the shape which extended the said horizontal flange diagonally downward along the shape of said 1st cone part from the radial direction inner side edge part was provided. Electric vacuum cleaner.   The vacuum cleaner according to claim 7, wherein a rib is provided from an outer peripheral wall surface of the oblique flange toward a radially outer side.   The vacuum cleaner according to claim 7 or 8, further comprising a hollow bag member having one end connected to the tip of the horizontal flange and the other end connected to the tip of the oblique flange.   The vacuum cleaner according to any one of claims 3 to 9, wherein either or both of the horizontal flange and the oblique flange are formed of an elastic material.   The vacuum cleaner according to any one of claims 7 to 9, wherein the oblique flange is formed of an elastic material.   The vacuum cleaner according to any one of claims 7 to 9, wherein the horizontal flange and the oblique flange are formed of an elastic material.   The said 1st exit was comprised with the member which provided the hollow cone with which a diameter became small as it approached the front-end | tip of a hollow cylinder, and provided the many opening in the said hollow cylinder and the said hollow cone. The vacuum cleaner as described in any one of.   The vacuum cleaner according to claim 1, further comprising a second cyclone having a centrifugal force higher than that of the first cyclone at a downstream position of the first cyclone.

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