JP2014083221A - Cyclone separator, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone separator capable of improving the performance of separating dust without any increase in size of the cyclone separator and reducing noise, and to provide a vacuum cleaner including the same.SOLUTION: A cyclone separator includes: a swirl chamber 12 for swirling dust-contained air flowing in from an inlet 12a along a side surface to separate dust from the dust-contained air; an outflow pipe 11 connected to the inlet 12a; a dust collection chamber 14 communicated with the interior of the swirl chamber 12 through an opening part 13 formed on the side surface of the swirl chamber 12; and a discharge pipe 18 connected to a discharge port 17 for discharging the air in the swirl chamber 12. The inflow pipe 11 has a first inflow pipe part 11b continuously reduced in air duct sectional area of the pipe along the circulating direction of the air, and an air duct side wall 112b of the first inflow pipe part 11b is provided with a plurality of projection pieces 11c along the circulating direction of the air.

Description

  The present invention relates to a cyclone separator and a vacuum cleaner equipped with a cyclone separator.

  Conventionally, for example, Patent Document 1 describes a technique related to a vortex chamber separator. In this vortex chamber separator, an opening is formed in a cylindrical container, and air is taken into the container through this opening (see FIGS. 21, 22, 23, 24, and 25 of Patent Document 1).

  In the cyclone separation device having such a configuration, the area of the opening must be reduced to ensure the flow rate of air flowing into the container. For this reason, the opening and the air path leading to the opening are configured in a nozzle shape. Thereby, since the turbulent flow produced by the flow of the preceding fluid is calmed, the separation performance of the vortex chamber is enhanced.

  Moreover, in the cyclone separation apparatus described in Patent Document 1, another apparatus having a cyclone separation function is installed on the upstream side of the container in order to prevent clogging of dust in the opening and the air passage. That is, in the cyclone separation device described in Patent Document 1, large dust is removed in advance by the other device, and air from which large dust has been removed is taken into the container.

Japanese National Patent Publication No. 5-506182

  The vortex chamber separator described in Patent Document 1 is configured to reduce the cross-sectional area of the inflow pipe so as to introduce an air flow from the outside of the swirl chamber in order to improve the centrifugal separation performance. For this reason, there is a problem that a separation vortex is generated at the outlet end (edge portion) of the inflow pipe and airflow noise is generated. Further, since the inflow pipe is connected from the outer side of the outline of the vortex chamber, there is a problem that the size in the radial direction is increased and the apparatus is enlarged.

  In household appliances represented by the vacuum cleaner of the present invention, it is required to make the configuration as small as possible. For this reason, conventional cyclone cleaners cannot adopt a wind path configuration that avoids bending and dimensional changes with large changes, and depending on the inflow state of the airflow into the swirl flow in the swirl chamber, turbulent flow such as separated flow is not possible. As a result, there is a problem that the sound of airflow increases and the sound of driving increases.

  The present invention has been made in view of the above-described problems, and a cyclone separation device that can improve the separation performance of dust and reduce noise without increasing the size of the device, and such a device. It aims at providing the vacuum cleaner provided with the cyclone separation apparatus.

  A cyclone separation device according to the present invention swirls dust-containing air flowing in from an inlet along a side surface, separates dust from dust-containing air, an inlet pipe connected to the inlet, and a swirl chamber A dust collection chamber that communicates with the inside of the swirl chamber through an opening formed in the side surface, and a discharge pipe connected to a discharge port for discharging the air in the swirl chamber. Having a first inflow pipe part in which the cross-sectional area of the air passage of the pipe continuously decreases along the flow direction, and having a plurality of projecting pieces along the air flow direction on the inner wall of the first inflow pipe part It is.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the cyclone separation apparatus which can improve the separation performance of a waste and can reduce a driving | running sound, without enlarging an apparatus.

It is a perspective view which shows the external appearance of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a perspective view of the cleaner body concerning Embodiment 1 of the present invention. It is a top view of the cleaner main body which concerns on Embodiment 1 of this invention. It is aa sectional drawing of the cleaner body shown in FIG. It is a perspective view which shows the external appearance of the dust collection unit which concerns on Embodiment 1 of this invention. It is a top view of the dust collection unit which concerns on Embodiment 1 of this invention. It is AA sectional drawing of the dust collection unit shown in FIG. It is BB sectional drawing of the dust collection unit shown in FIG. (A) is the schematic diagram which shows the BB cross section of the swirl chamber and inflow tube of the vacuum cleaner of FIG. 7, (b) is the figure which looked at the swirl chamber and inflow tube from the direction of A in (a). It is. It is a schematic diagram which shows CC cross section of the dust collection unit of the vacuum cleaner of FIG. It is a schematic diagram for demonstrating the structure of the cross-sectional sawtooth-shaped protrusion of Embodiment 1 of this invention. It is the schematic which shows the structure of the inflow pipe structure of Embodiment 1 of this invention, and its comparative example. It is a graph which shows the effect of the inflow pipe structure of Embodiment 1 of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a cyclone separation device and a vacuum cleaner according to the invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing an external appearance of a vacuum cleaner according to the present invention. As illustrated in FIG. 1, the vacuum cleaner 100 includes a suction port body 1, a suction pipe 2, a connection pipe 3, a suction hose 4, and a cleaner body 5.

  Further, a power cord is connected to the cleaner body 5, which is energized when the power cord is connected to an external power source, and an electric blower 52 described later is driven to perform a suction operation. The suction port body 1, the suction pipe 2, the connection pipe 3, and the suction hose 4 are configured as a part of a suction path for allowing dust-containing air to flow from the outside to the inside of the cleaner body 5.

  2 is a perspective view of the cleaner body 5, FIG. 3 is a top view of the cleaner body 5, and FIG. 4 is an aa cross-sectional view of the cleaner body 5 shown in FIG.

  The vacuum cleaner main body 5 includes a dust collection unit housing portion 5a in which a dust collection unit 50 (a cyclone separating device), which will be described later, is detachably mounted and housed, and an electric blower housing portion 5b that houses an electric blower 52, which will be described later. ing.

  The dust collection unit accommodating portion 5a is formed on the upper side of the cleaner body 5, and is formed in such a manner that the front side is lower and becomes higher toward the rear, and a part of the front side protrudes substantially perpendicular to the inclination. ing. The dust collection unit 50 is mounted and accommodated along the inclined surface of the dust collection unit accommodating portion 5a, and the bottom surface is covered and stably held by the protruding portion on the front side.

  Various devices other than the dust collection unit 50 are accommodated in the electric blower accommodating portion 5b. For example, an intake air passage 49, an exhaust air passage 51, an electric blower 52, an exhaust port (not shown), a cord reel, Is housed. The electric blower housing 5b is provided with wheels 53 on the side thereof.

  Next, the structure of the dust collection unit 50 will be described. FIG. 5 is a perspective view showing the appearance of the dust collection unit 50, and FIG. 6 is a top view of the dust collection unit 50. 7 is a cross-sectional view taken along line AA of the dust collection unit 50 shown in FIG. 6, and FIG. 8 is a cross-sectional view taken along line BB of the dust collection unit 50 shown in FIG.

  As shown in FIGS. 5 to 8, the dust collection unit 50 includes an inflow pipe 11 that takes in the dust-containing air through the intake air passage 49, and a swirl chamber 12 that has a side wall that includes a cylindrical portion 12 a and a conical portion 12 b. A first side opening 13 a formed by opening a part of the side wall of the swirl chamber 12, and a first side dust collection chamber 14 a communicating with the swirl chamber 12 via the first side opening 13. The swirl chamber is formed by opening a part of the side wall of the swirl chamber 12 and the second side opening 13b located on the downstream side of the first side opening 13a and the second side opening 13b. A second side dust collecting chamber 14 b communicating with the lower opening 12, a lower opening 15 formed by opening an axially lower wall surface of the swirling chamber 12, and a lower communicating with the swirling chamber 12 via the lower opening 15. The dust collection chamber 16, the exhaust pipe 18 that exhausts air to the exhaust air passage 51, and the swirl chamber 12 and the exhaust pipe 18 communicate with each other. That and the discharge port 17, and a.

  The inflow pipe 11 has, for example, a rectangular cylindrical shape and is connected to the swirl chamber 12. Specifically, the inflow pipe 11 has one end opened to the outside and the other end opened to the inside of the swirl chamber 12, whereby dust-containing air that has passed through the suction air passage 49 is removed from the swirl chamber 12. The inflow port 12a for taking in to the inside is formed.

  The inflow pipe 11 is connected to the upper part of the swirl chamber 12. For this reason, the inlet 12 a for the dust-containing air is formed in the upper part of the swirl chamber 12. The inflow pipe 11 is made of a straight member, and its axis is perpendicular to the central axis of the swirl chamber 12 and is disposed in the tangential direction of the swirl chamber 12.

  Next, with reference to FIGS. 5-8, the path | route which discharges the air which flowed in the inside of the cleaner body 5 out of the cleaner body 5 is demonstrated.

  The dust-containing air that has flowed into the cleaner body 5 reaches the dust collection unit 50 via the intake air passage 49. In the dust collection unit 50, the inflow pipe 11, the swirl chamber 12, the discharge port 17, and the discharge pipe 18 are circulated in this order, and then circulate to the exhaust air passage 51 side of the cleaner body 5. Thereafter, the air is exhausted to the outside of the cleaner body 5 through an exhaust air path 51 and an exhaust path including an exhaust port (not shown).

  Next, the operation of the dust collection unit 50 will be described. When the dust collecting unit 50 takes in the dust-containing air from the inflow pipe 11 through the suction air passage 49, the dust-containing air flows in a substantially tangential direction with respect to the side wall of the swirl chamber 12 to form a swirl airflow. While forming a forced vortex region near the central axis and a free vortex region on the outer peripheral side thereof, the flow flows below the swirl chamber 12 due to its path structure and gravity. At this time, since centrifugal force acts on the waste, for example, relatively large waste such as large fiber waste and hair (hereinafter referred to as “garbage A”) is pressed against the inner wall of the swirl chamber 12 and is generated from the swirl airflow. It is separated and sent to the first side dust collection chamber 14a through the first side opening 13a. On the other hand, among the waste A, sand dust that has a relatively large specific gravity and easily descends in the swirl chamber, and waste that could not be completely removed by the first side dust collection chamber 14a, passes through the second side opening 13b to the second side. It is sent to the dust collection chamber 14b.

  The dust that has not flowed into the first side dust collection chamber 14a and the second side dust collection chamber 14b travels below the swirl chamber 12 by the swirling airflow descending the swirl chamber 12. In the conical portion 12b below the swirl chamber 12, the centrifugal force is increased, so that dust having a relatively small volume (hereinafter referred to as “garbage B”) such as fine dust and fine fiber dust is separated from the swirling airflow, It is sent into the lower dust collection chamber 16 through the opening 15 and captured.

  The swirling airflow from which the dust A and the dust B are removed is reversed below the swirl chamber 12, rises along the central axis of the swirl chamber 12, and is discharged from the discharge port 17. The air discharged from the discharge port 17 passes through the discharge pipe 18 and is discharged to the exhaust air passage 51 side of the cleaner body 5.

  FIG. 9 is a schematic view showing a B-B cross section of the swirl chamber and the inflow pipe of the vacuum cleaner in FIG. 7. In addition, (a) in the figure is a BB cross section of the swirl chamber 12 and the inflow pipe 11, and (b) is a view of the swirl chamber 12 and the inflow pipe 11 as viewed from the direction A in (a). , Respectively.

  The inflow pipe 11 of the cyclone separation device according to the present invention includes a first inflow pipe 11b (first inflow pipe portion) in which the airway cross-sectional area of the pipe continuously reduces along the inflow direction of the wind and a swirl chamber. The second inflow pipe 11a (second inflow pipe portion) to be connected is connected to be configured. In addition, a plurality of protruding pieces 11c having a sawtooth cross section are formed on the inner wall of the first inflow pipe 11b. Note that the cross-sectional shapes of the first inflow pipe 11b and the second inflow pipe 11a have a high degree of design freedom such as a circle and a square, and the dimensions of each side, the linearity and the curvature in the longitudinal direction, etc. There is no particular restriction and is arbitrary. However, in order to achieve the object of the present invention, the air channel side wall 112a (third side wall) on the left side of the second inflow pipe 11a in the drawing is parallel to the air channel side wall 111a (first side wall) in the drawing. The right air channel side wall 111a is provided in a tangential direction with respect to the swirling airflow in the swirl chamber (that is, the air channel side wall 111a extends in the tangential direction from the inlet 12a to the side surface of the swirl chamber 12). It is preferable that it is formed with an extending surface). As the edge portion 11d in the figure becomes sharper, the separation flow generated at that portion becomes larger, and as a result, the air flow noise increases. Therefore, it is preferable to increase the angle as much as possible.

  In the present invention, the cross-sectional shapes of the first inflow pipe 11b and the second inflow pipe 11a are quadrangular, and the communicating portions have the same shape and the same dimensions. In the drawing, the first inflow pipe 11b is connected to the second inflow pipe 11a for the purpose of changing the size of the air passage cross-sectional area of the pipe, and the air passage cross-sectional area decreases in the inflow direction. It is a simple shape. Since the air channel side wall 111b (first side wall) on the right side in the drawing needs to be continuous as much as possible, the airflow flowing into the swirl chamber is tangential to the swirl flow. It is formed on the tangent line so as to flow into the. However, if it is unavoidable due to the structure of the product, it is possible to provide a predetermined length capable of rectifying the airflow passing through a continuous plane (more preferably a straight line) portion from the communicating portion with the swirl chamber 12. For example, the right-side air passage side wall 111b may also have a protruding shape so that the air passage cross-sectional area changes. Further, in the figure, the air channel side wall 111b on the right side of the second inflow pipe 11b has been described, but the present invention is not limited to this, and the same applies to the air channel walls other than the left and right sides.

  Next, the characteristic structure of the vacuum cleaner of this Embodiment is demonstrated in detail. The wind flowing through the inflow pipe 11 flows along the wall surface of the inflow pipe. However, when the wind reaches the communication part (that is, the inlet 12a) with the cyclone swirl chamber 12, the wind is peeled off from the wall surface and flows into the swirl chamber 12. enter. The peeled wind (separated flow) has a flow velocity that is faster than that of the surrounding wind, and generates a turbulent flow, causing a phenomenon that the flow resistance is rapidly increased. The plurality of projecting pieces 11c of the present embodiment is intended to suppress the generation of the separation flow and suppress the increase of the airflow sound in the cyclone swirl chamber.

  In the figure, a plurality of protruding pieces 11c having a sawtooth cross section formed on the inclined left air channel side wall 112b (second side wall) of the second inflow pipe 11b are formed in the swirl chamber 12 and the first inflow pipe 11a. It is installed according to the position of the edge part 11d in the connection part, and is located on the upstream side of the airflow passing through the edge part 11d.

  FIG. 10 is a schematic view showing a C-C cross section of the dust collection unit of the electric vacuum cleaner of FIG. 8. FIG. 11 is a schematic diagram for explaining the structure of the protruding piece 11c having a sawtooth cross section according to the first embodiment of the present invention. As shown in the drawing, the protruding piece 11c having a sawtooth cross section is formed by arranging bar-shaped protruding pieces having a width w, a length l, and a height h (not shown) at equal intervals with a gap g. The dimensions of w, l, h, and g are arbitrary, the degree of freedom in design is wide, and the dimensions of each side, the linearity and the curvature in the longitudinal direction are not particularly limited, The number of arrangement of the projecting pieces 11c is also arbitrary. However, discontinuous shapes such as corners and protrusions are not preferable on the outer periphery of the projecting piece 11c, and it is best that the bent portions at each corner have an R shape that is as smooth as possible.

  Also, as in the present invention, for small resin molded products such as household vacuum cleaners, it is possible to disperse the separation flow by arranging as many protrusions as possible within the range of manufacturable dimensions. preferable. In the present invention, seven rectangular protrusions with w = 2.0 mm, l = 20.0 mm, and h = 2.0 mm were arranged at g = 1.5 mm.

  FIG. 12 is a schematic diagram showing an inflow pipe structure according to Embodiment 1 of the present invention and a structure of a comparative example thereof. In the figure, (a) is the configuration of the embodiment of the present invention, (b) is the configuration without the cross-sectional sawtooth protrusion 11c in (a), and (c) is the conventional configuration without the cross-sectional sawtooth protrusion 11c. (D) shows the configuration in which the cross-sectional sawtooth-shaped protrusion 11c is arranged in (c), and (e) shows the configuration in which the cross-sectional sawtooth-shaped protruding piece 11c in (c) is arranged at a distance from the edge portion 11d. ing.

  In FIG. 12, (a), as described above, the airflow is dispersed into a plurality by passing between each of a plurality of serrated protrusions, and merges with the swirl flow in the swirl chamber 12 through the first inflow pipe 11a. To do. In (b), a large separation flow is generated at the connection between the first inflow pipe 11a and the second inflow pipe 11b, and merges with the swirl flow in the swirl chamber 12 through the first inflow pipe 11a. In (c), the edge portion 11d has a sharper angle than that in (a), and a large separation flow is generated at the edge portion 11d. In (d), after the airflow is dispersed by a large number of sawtooth-shaped projecting pieces in cross section, each separated flow is generated at the edge portion 11d. (E) is similar to (d), and after the airflow is dispersed by the sawtooth-shaped projecting piece in the cross section, each separated flow is generated at the edge portion 11d.

FIG. 13 is a graph showing the effect of the inflow pipe structure according to the first embodiment of the present invention. It is the result of having measured the pressure loss of the cyclone apparatus part of the vacuum cleaner which each has the inflow pipe of said (a) (b) (c) (d) (e). In the measurement, in order to make each air volume the same, the input of the blower motor was adjusted, and a cyclone main body with an air volume of 1.3 m ³ / min was used.

  As a result of the measurement, (a) which is the configuration of the embodiment of the present invention has the lowest pressure loss, which is a significant difference from the configurations of (b), (c) and (d). In particular, the difference of 0.5 kPa from the configuration of (c) was a difference of 3 dB or more in driving sound.

  In the above embodiment, the canister type vacuum cleaner 100 has been described. However, the present invention may be applied to other types of vacuum cleaners.

  As described above, the dust collection unit 50 according to the present embodiment swirls the dust-containing air flowing in from the inlet 12a along the side surface and separates the dust from the dust-containing air, and the inlet 12a. A dust collecting chamber 14 communicating with the inside of the swirl chamber 12 through an opening 13 formed on the side surface of the swirl chamber 12, and a discharge for discharging the air in the swirl chamber 12. A discharge pipe 18 connected to the outlet 17, and the inflow pipe 11 includes a first inflow pipe portion 11b in which the air passage cross-sectional area of the pipe is continuously reduced along the air flow direction. By forming a plurality of projecting pieces 11c along the air flow direction on the air passage side wall 112b of the one inflow pipe portion 11b, the separation performance of dust is improved without increasing the size of the apparatus, and noise is reduced. Can be reduced.

  Further, in the dust collecting unit 50 according to the present embodiment, the air passage side walls 111a and 111b of the inflow pipe 11 are formed by surfaces extending in the tangential direction of the side surface of the swirl chamber 12 from the inflow port 12a. It is possible to effectively suppress a situation in which a separation flow is generated at the connection portion between the road side wall 111a and the inlet 12a of the swirl chamber 12.

  In the dust collection unit 50 according to the present embodiment, a plurality of protruding pieces 11c having a sawtooth cross section are formed on the inclined air passage side wall 112b. According to such a configuration, the airflow can be merged with the swirl flow in the swirl chamber 12 after being dispersed in a plurality of airflows on the upstream side of the airflow passing through the edge portion 11d, so that the apparatus is not enlarged. Waste separation performance can be improved and noise can be reduced.

  In addition, the dust collection unit 50 according to the present embodiment includes a right air channel side wall 111a provided in a tangential direction with respect to the swirling airflow in the swirl chamber 12, and a left side formed in parallel with the air channel side wall 111a. The second inflow pipe 11a having the air passage side wall 112a is provided. According to such a configuration, since the angle of the edge portion 11d can be increased as much as possible, it is possible to effectively suppress an increase in airflow noise.

  Further, in the dust collection unit 50 according to the present embodiment, since the inflow pipe 11 is configured by a pipe having a substantially rectangular air passage cross-sectional shape, the separation flow generated at the inflow port 12a should be as small as possible. Can do.

  Moreover, since the dust collection unit 50 which concerns on this Embodiment is mounted in the vacuum cleaner 100, the vacuum cleaner which improved the isolation | separation performance of the waste and reduced the noise, without enlarging an apparatus. It becomes possible to provide.

DESCRIPTION OF SYMBOLS 1 Suction port body, 2 Suction pipe, 3 Connection pipe, 4 Suction hose, 5 Vacuum cleaner main body, 5a Dust collection unit accommodating part, 5b Electric blower accommodating part, 11 Inflow pipe, 11b 1st inflow pipe, 11a 2nd Inflow pipe, 11c Projection piece, 11d Edge, 111a Air channel side wall (first side wall), 111b Air channel side wall (first side wall), 112b Air channel side wall (second side wall), 112a Air channel side wall (first 3 side wall), 12 swirl chamber, 12a inlet, 13a first side opening, 13b second side opening, 14a first side dust collection chamber, 14b second side dust collection chamber, 15 lower opening 16, lower dust collection chamber, 17 discharge port, 18 discharge pipe, 49 suction air passage, 50 dust collection unit, 51 exhaust air passage, 52 electric blower, 53 wheels, 100 vacuum cleaner

A cyclone separation device according to the present invention swirls dust-containing air flowing in from an inlet along a side surface, separates dust from dust-containing air, an inlet pipe connected to the inlet, and a swirl chamber A dust collection chamber that communicates with the inside of the swirl chamber through an opening formed in the side surface, and a discharge pipe connected to a discharge port for discharging the air in the swirl chamber. A first inflow pipe portion in which the air passage cross-sectional area of the pipe continuously decreases along the flow direction, and a second inflow pipe portion connecting the inflow port and the first inflow pipe portion , The second inflow pipe portion includes a first side wall formed by a surface extending in a tangential direction of the side surface of the swirl chamber from the inflow port, and a third side wall facing substantially parallel to the first side wall. The first inflow pipe portion has the first side wall and the first inflow portion so that the air passage width of the first inflow portion becomes narrower toward the inflow port. And a second opposite side walls inclined with respect to the wall, the one in which a plurality of projecting pieces along a flow direction of air to the inner wall of the second side wall.

In the present invention, the cross-sectional shapes of the first inflow pipe 11b and the second inflow pipe 11a are quadrangular, and the communicating portions have the same shape and the same dimensions. In the drawing, the first inflow pipe 11b is connected to the second inflow pipe 11a for the purpose of changing the size of the air passage cross-sectional area of the pipe, and the air passage cross-sectional area decreases in the inflow direction. It is a simple shape. Since the air channel side wall 111b (first side wall) on the right side in the drawing needs to be continuous as much as possible, the airflow flowing into the swirl chamber is tangential to the swirl flow. It is formed on the tangent line so as to flow into the. However, if it is unavoidable due to the structure of the product, it is possible to provide a predetermined length capable of rectifying the airflow passing through a continuous plane (more preferably a straight line) portion from the communicating portion with the swirl chamber 12. For example, the right-side air passage side wall 111b may also have a protruding shape so that the air passage cross-sectional area changes. Further, in the drawing, the air channel side wall 111b on the right side of the first inflow pipe 11b has been described, but the present invention is not limited to this, and the same applies to the air channel walls other than the left and right sides.

In the drawing, a plurality of projecting pieces 11c having a sawtooth cross section formed on the inclined left air passage side wall 112b (second side wall) of the first inflow pipe 11b are formed in the swirl chamber 12 and the second inflow pipe 11a. It is installed according to the position of the edge part 11d in the connection part, and is located on the upstream side of the airflow passing through the edge part 11d.

(A) in FIG. 12 is, as described above, the airflow is dispersed into a plurality by passing between each of a number of serrated protrusions, and merges with the swirl flow in the swirl chamber 12 through the second inflow pipe 11a. To do. In (b), a large separation flow is generated at the connection portion between the second inflow pipe 11a and the first inflow pipe 11b, and merges with the swirl flow in the swirl chamber 12 through the second inflow pipe 11a. In (c), the edge portion 11d has a sharper angle than that in (a), and a large separation flow is generated at the edge portion 11d. In (d), after the airflow is dispersed by a large number of sawtooth-shaped projecting pieces in cross section, each separated flow is generated at the edge portion 11d. (E) is similar to (d), and after the airflow is dispersed by the sawtooth-shaped projecting piece in the cross section, each separated flow is generated at the edge portion 11d.

Claims (6)

A swirl chamber that swirls the dust-containing air flowing in from the inlet along the side surface and separates dust from the dust-containing air;
An inlet pipe connected to the inlet;
A dust collection chamber communicating with the inside of the swirl chamber through an opening formed in the side surface of the swirl chamber;
A discharge pipe connected to a discharge port for discharging the air in the swirl chamber,
The inflow pipe has a first inflow pipe portion in which the air passage cross-sectional area of the pipe is continuously reduced along the air flow direction;
A cyclone separator comprising a plurality of projecting pieces along an air flow direction on an inner wall of the first inflow pipe portion.   The cyclone separator according to claim 1, wherein the inflow pipe has a first side wall formed by a surface extending from the inflow port in a tangential direction of the side surface of the swirl chamber. The first inflow pipe portion is
The first sidewall;
A second side wall that is inclined and opposed to the first side wall so that an air passage width of the first inflow portion becomes narrower toward the inflow port,
The cyclone separator according to claim 2, wherein the projecting piece is formed on the second side wall. The inflow pipe has a second inflow pipe portion that connects the inflow port and the first inflow pipe portion,
The second inflow pipe portion is
The first sidewall;
A third sidewall facing substantially parallel to the first sidewall;
The cyclone separation apparatus according to claim 2 or 3, comprising:   The cyclone separator according to any one of claims 2 to 4, wherein the inflow pipe is a pipe having a substantially rectangular air passage cross-sectional shape. A cyclone separator according to any one of claims 1 to 5,
A blower for generating an air flow inside the cyclone separator;
Electric vacuum cleaner.

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