JP2020081189A - Vacuum cleaner - Google Patents

Abstract

To provide a vacuum cleaner comprising a dust collection device 14 which is suppressed in decrease of dust separation performance.SOLUTION: There is provided a dust collection device 14 which separates dust from dust-containing air to collect the dust, and includes a first separation part 111 located upstream and a second separation part 122 separating the dust in the dust-containing air passing through the first separation part 111 by a centrifugal separation system. The second separation part 122 includes: a separation cylinder 121; an inflow part 171 introducing the dust-containing air into the separation cylinder from above; and an exhaust cylinder 141 disposed in the separation cylinder 121 and exhausting the dust-separated air. The exhaust cylinder 141 includes: an exhaust cylinder opening part 191 introducing the dust-separated air; and an exhaust port 105 exhausting the air introduced from the exhaust cylinder opening part 191. The outer surface of the exhaust cylinder 141 includes an inclined part 161 spirally descending in a direction of the exhaust cylinder opening part 191 from the direction of the exhaust port 105. The surface of the inclined part 161 is inclined in a rising direction toward the outer peripheral side from the inner peripheral side in a diameter direction of the exhaust cylinder 141.SELECTED DRAWING: Figure 4

Description

The present invention relates to a dust collector that separates and collects air and dust, and a dust collector that has a first separating section located upstream and a second separating section located downstream from the first separating section. The present invention relates to a vacuum cleaner provided.

Conventionally, in the electric vacuum cleaner of this type, the second separating part covers the separating cylinder arranged substantially concentrically with the dust container and the top surface of the second separating part so that the second separating part projects into the inner center of each of the separating cylinders. And a centrifugal separation unit lid that has an exhaust tube that discharges the air that has flowed into the separation tube upward (see, for example, Patent Document 1).

JP, 2017-23231, A

However, in the above-mentioned conventional configuration, a part of the air containing dust (dust-containing air) descends while swirling through the vicinity of the exhaust pipe, and is discharged from the exhaust pipe inlet without sufficiently separating air and dust. Since it enters the cylinder and is discharged upward, the dust separation performance is deteriorated.

The present invention is to solve the above-mentioned conventional problems, in which dust-containing air is sufficiently separated from the air and then discharged into the exhaust pipe from the exhaust pipe inlet to be discharged upward, whereby the dust separation performance is improved. To provide an electric vacuum cleaner equipped with a dust collecting device capable of suppressing a decrease in temperature.

In order to solve the conventional problems, an electric vacuum cleaner of the present invention separates dust from a cleaner body that houses an electric blower, and dust-containing air that is detachably attached to the cleaner main body and is sucked by the electric blower. And a dust collecting device for collecting the dust, and the dust collecting device separates the dust in the dust-containing air that has passed through the first separating portion by a centrifugal separation method. The second separation unit includes a separation cylinder, an inflow unit for introducing dust-containing air into the separation cylinder from above, and an air disposed in the separation cylinder for exhausting dust-separated air. The exhaust pipe has an exhaust pipe inlet part for introducing air after dust separation, and an exhaust port for discharging the air introduced from the exhaust pipe inlet part, and the exhaust pipe outer surface is There is an inclined portion that spirally descends from the exhaust port direction toward the exhaust pipe inlet portion, and the surface of the inclined portion is a surface inclined in the ascending direction from the inner peripheral side to the outer peripheral side in the radial direction of the exhaust pipe. By doing so, it is possible to suppress deterioration of the dust separation performance by sufficiently separating the air containing dust from the air and dust, and then entering the exhaust pipe from the exhaust pipe inlet and discharging it upward. It is possible to provide an electric vacuum cleaner.

In the vacuum cleaner of the present invention, the air containing dust is sufficiently separated from the air, and thereafter the air enters the exhaust pipe from the exhaust pipe inlet portion and is discharged upward, thereby suppressing deterioration of dust separation performance. It becomes possible.

The side view of the vacuum cleaner in Embodiment 1 of this invention. Perspective view of the dust collector of the same vacuum cleaner Side view of the dust collector of the vacuum cleaner FIG. 2 is a vertical cross-sectional view of the dust collector of FIG. (A) A perspective view of an exhaust cylinder of the dust collector (b) A perspective view of a separation cylinder of the dust collector A partially enlarged view of the vicinity of the exhaust stack of the dust collector in FIG. BB sectional drawing of the dust collector in FIG. (A) A perspective view showing the behavior of fine dust when the surface of the spiral inclined portion around the exhaust pipe of the dust collector is not inclined in the radial direction from the inner peripheral side to the outer peripheral side (b) This embodiment Perspective view showing the behavior of fine dust in the form 1 (A) A side view showing the behavior of fine dust when the bottom surface of the separation cylinder inlet of the dust collector is provided so as to be orthogonal to the separation cylinder. (b) Shows the behavior of fine dust in the first embodiment. Side view (A) A perspective view showing the behavior of fine dust when the side face of the separation cylinder inlet of the dust collector and the side face of the exhaust pipe are flush with each other (b) A perspective view showing the behavior of fine dust in the first embodiment Figure (A) A perspective view showing the behavior of fine dust when the exhaust stack of the dust collector is substantially cylindrical (b) A perspective view showing the behavior of fine dust in the first embodiment

A first invention includes a cleaner body that houses an electric blower, and a dust collector that is detachably provided on the cleaner body and that separates and collects dust from dust-containing air sucked by the electric blower, The dust collector has a first separation unit that separates dust and air, and a second separation unit that separates dust in the dust-containing air that has passed through the first separation unit by a centrifugal separation method. The portion has a separation cylinder, an inflow portion that introduces dust-containing air into the separation cylinder from above, and an exhaust cylinder that is disposed in the separation cylinder and that exhausts the air after dust separation. It has an exhaust pipe inlet part for introducing the air after dust separation and an exhaust port for discharging the air introduced from the exhaust pipe inlet part, and the outer surface of the exhaust pipe spirals from the exhaust port direction to the exhaust pipe inlet part direction. It has a slanting part that descends like a line, and the surface of the slanting part is a surface that is slanted in the ascending direction from the inner peripheral side to the outer peripheral side in the radial direction of the exhaust stack, and is sufficient to remove air containing dust. By separating the air and dust and then entering the exhaust pipe from the exhaust pipe inlet and discharging it upward, it is possible to suppress deterioration of the dust separation performance.

A second aspect of the invention includes a cleaner body that houses the electric blower, and a dust collector that is detachably provided in the cleaner body and that separates and collects dust from dust-containing air sucked by the electric blower. The dust collector has a first separation unit that separates dust and air, and a second separation unit that separates dust in the dust-containing air that has passed through the first separation unit by a centrifugal separation method. The portion has a separation cylinder, an inflow portion that introduces dust-containing air into the separation cylinder from above, and an exhaust cylinder that is disposed in the separation cylinder and that exhausts the air after dust separation. It has an exhaust pipe inlet part for introducing the air after dust separation and an exhaust port for discharging the air introduced from the exhaust pipe inlet part, and the bottom face part of the inflow part is directed upward from the upstream side to the downstream side. It has a slope, and suppresses the deterioration of dust separation performance by allowing air containing dust to be sufficiently separated from the air and then entering the exhaust pipe from the exhaust pipe inlet and discharging upward. Will be possible.

A third aspect of the invention includes a cleaner body that houses the electric blower, and a dust collector that is detachably provided on the cleaner body and that separates and collects dust from dust-containing air sucked by the electric blower. The dust collector has a first separation unit that separates dust and air, and a second separation unit that separates dust in the dust-containing air that has passed through the first separation unit by a centrifugal separation method. The portion has a separation cylinder, an inflow portion that introduces dust-containing air into the separation cylinder from above, and an exhaust cylinder that is disposed in the separation cylinder and that exhausts the air after dust separation. An exhaust pipe inlet part for introducing air after dust separation, and an exhaust port for discharging the air introduced from the exhaust pipe inlet part, wherein the side surface of the inflow part is projected from the side surface of the exhaust pipe, By sufficiently separating the air containing dust from the air and the dust and then entering the exhaust pipe from the exhaust pipe inlet portion and discharging the air upward, it is possible to suppress deterioration of the dust separation performance.

In a fourth aspect of the invention, in particular, in the exhaust stack according to any one of the first to third aspects, a part including an exhaust stack inlet portion has a tapered shape in which a lower outer diameter is smaller than an upper outer diameter. By further separating the air containing dust from the air and dust, the air enters the exhaust pipe from the exhaust pipe inlet and is discharged upward, further suppressing the deterioration of dust separation performance. Will be possible.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
The electric vacuum cleaner according to the present embodiment will be described by taking a stick type electric vacuum cleaner as an example.

In FIG. 1, an electric vacuum cleaner 10 according to the present embodiment includes a cleaner body 11, a suction tool 12, a pipe 13, a flow path (not shown) in the pipe 13 and an inlet (not shown). An electric blower case 15 including an electric blower (not shown) communicating with the dust collector 14 communicating with the dust collector 14 and an exhaust port (not shown), and a dust collector 14 and an electric blower case 15 And a filter 16 for preventing fine dust that cannot be removed by the dust collector 14 from entering the electric blower, a main body exhaust port 17 for exhausting the exhaust of the electric blower to the outside, an electric blower, etc. A battery case 18 containing a battery (not shown) for supplying electric power is provided. Further, a fine dust container 19 is provided at a position outside and below the dust collector 14.

Next, the dust collector 14 will be described in detail with reference to FIGS.

As shown in FIGS. 2 and 3, the dust collector 14 includes a case 102 that is an outer shell, and a dust discharge lid 104 that covers the lower surface of the case 102 and is rotatably supported by the case 102. There is. The case 102 has an inlet 107 that guides the sucked dust into the case 102. The inlet 107 is formed to face the tangential direction of the case 102.

The dust discharge lid 104 is rotatable by a hinge portion 108 provided on the case 102, and is airtight (keeps airtightness) with the case 102 by a bottom lid packing (not shown) attached to the dust discharge lid 104. .. In electric vacuum cleaner 10 of the present embodiment, as shown in FIG. 1, dust collector 14 and filter 16 are arranged substantially linearly. Thereby, it is not necessary to provide a complicated exhaust flow path, and it is possible to obtain the electric vacuum cleaner 10 which is small in size and light in weight and excellent in design without increasing pressure loss.

In addition, as shown in FIG. 4, the inner lower portion of the dust collector 14 is composed of a first separating portion 111, a coarse dust accommodating portion 112, and a dust discharging lid 104. The first separating unit 111 is located in a case upper part 113 having an inlet 107 for introducing air containing dust, and is located below the upper part 113 of the case, and is substantially a cylinder for filtering dust from the dust-containing air introduced from the inlet 107. It is composed of a shaped filtration filter 114 and a case lower portion 116 that is located on the outer peripheral side of the filtration filter 114 and has a space 115 communicating with the inner peripheral side of the filtration filter 114. The introduction port 107 is arranged at an eccentric position so that the air flow enters the hollow cylinder 117 provided inside the case upper portion 113 from the tangential direction of its circumferential cross section.

A second separation part 122, which has a plurality of separation cylinders 121 in parallel and which communicates with the space 115 and separates the dust in the dust-containing air that has passed through the first separation part 111, is arranged downstream of the first separation part 111. It is set up. Further, the fine dust container 19 that stores the fine dust that is separated by the second separation unit 122 and is discarded from the waste port 123 provided in the lower portion of the separation cylinder 121 to the outside of the separation cylinder 121 is located outside the first separation unit 111. The second separation unit 122 and the first separation unit 111 are connected to each other by a second
A fine dust transfer space 125 communicating with the fine dust container 19 is provided so that the fine dust separated by the separator 122 can be dropped into the fine dust container 19.

Further, by opening the dust discharge lid 104, it is possible to simultaneously discharge the coarse dust collected in the coarse dust storage portion 112 and the fine dust collected in the fine dust storage portion 19. Here, the dust collecting device 14 is provided so as to be detachable from the cleaner body 11, and only the dust collecting device 14 needs to be carried when discarding the collected dust, so that the dust can be easily discarded. Has become.

An exhaust tube 141 is provided above the separation tube 121, and the air separated by the second separation section 122 rises through the exhaust tube 141 and is exhausted from the exhaust port 105 to the outside of the dust collector 14. Has become.

Here, detailed configurations of the separation cylinder 121 and the exhaust cylinder 141 in the present embodiment will be described with reference to FIGS. 5 to 7.

As shown in FIG. 5A, the plurality of exhaust tubes 141 are arranged in a substantially concentric shape, and are integrally configured with the lid 151 of the dust collector 14. Further, as shown in FIG. 5B, the separation cylinder 121 is also arranged substantially concentrically and is integrally configured with the case 102. By combining the two, the second separation portion 122 is configured. There is.

A spiral inclined portion 161 is provided on the outer surface of each exhaust pipe 141. In the present embodiment, as shown in FIG. 6, the exhaust pipe 141 has an exhaust pipe inlet portion for introducing air after dust separation. 191 and an exhaust port 105 that discharges the air introduced from the exhaust pipe inlet portion 191. The inclined portion 161 spirally descends from the exhaust port direction toward the exhaust pipe inlet portion, and the inclined portion 161 The surface is a surface inclined in the rising direction from the inclined portion inner peripheral side 162 to the inclined portion outer peripheral side 163 in the radial direction of the exhaust pipe. As a result, fine dust contained in the dust-containing air introduced from the inflow portion 171 moves to the outer peripheral side 163 of the inclined portion and moves to a position away from the exhaust pipe 141 even if pushed by the air flow from the upstream portion. ..

In addition, the bottom surface portion 172 of the inflow portion 171 of the separation cylinder 121 is configured to be inclined upward from the upstream side to the downstream side. As a result, the fine dust once moves upward along the bottom surface portion 172 and then moves obliquely downward, and does not enter the exhaust pipe 141 from the exhaust pipe inlet 191 and swirls in the separation pipe 121 downward. It moves and the fine dust is separated from the air. Note that the inclination angle of the bottom surface portion 172 is represented large in FIG. 6 for easy understanding, but it is desirable that the inclination is about 5° in view of the balance between pressure loss and separation performance.

Further, as shown in FIG. 7, when the exhaust cylinder 141 and the separation cylinder 121 are combined, the inflow part side surface 181 of the inflow part 171 is configured to project more than the exhaust cylinder side surface 182 of the exhaust cylinder 141. As a result, the fine dust moves downward while turning at a position away from the exhaust pipe 141, and the fine dust is separated from the air.

Further, as shown in FIG. 6, a part of the exhaust pipe 141 including the exhaust pipe inlet portion 191 has a tapered shape in which the outer diameter on the lower side is smaller than the outer diameter on the upper side. As a result, the fine dust swirls at a position away from the exhaust pipe 141. Therefore, the fine dust moves downward while swirling in the separation cylinder 121 without entering the exhaust pipe 141 from the exhaust pipe inlet 191 and the fine dust is separated from the air.

The operation and action of the dust collector 14 configured as described above will be described below.
First, the suction airflow is generated by starting the operation of the electric blower, and the dust-containing air is sucked into the dust collector 14 from the inlet 107. Here, the introduction port 107 is arranged at an eccentric position so that the airflow can flow into the hollow cylinder 117 provided inside the case upper portion 113 from the tangential direction of its circumferential cross section. By disposing the introduction port 107 in this way, the dust-containing air that has flowed from the introduction port 107 into the hollow cylinder 117 of the case upper portion 113 flows along the inner peripheral surface of the hollow cylinder 117, so that the linear flow until then The airflow will change into a swirling airflow here.

Here, in the present embodiment, the inlet 107 is arranged in the tangential direction of the inner circumference of the hollow cylinder 117 of the case upper portion 113 to generate a swirling air flow, but it is not shown even if the inlet 107 is located in the center. Any configuration may be used as long as the swirling airflow is generated in the guideway, the guide, or the like.

Further, since the filtration filter 114 is arranged below the case upper portion 113 having the introduction port 107, a flow of an oblique spiral orbit that descends while swirling occurs. This swirling descending airflow flows downward while sliding on the surface of the filtration filter 114.

Then, the coarse dust, which is heavier than the air, is swung down as it is due to its inertial force, and is stored in the coarse dust storage portion 112. On the other hand, air and fine dust smaller than the ventilation holes (not shown) of the filtration filter 114 are located on the outer peripheral side of the filtration filter 114, pass through the space 115 communicating with the inner peripheral side of the filtration filter 114, 2 flows to the separation unit 122. In this way, the first separation unit 111 separates the coarse dust from the air containing the fine dust.

In the present embodiment, innumerable vent holes (not shown) are provided on the entire outer periphery of the filtration filter 114. The filtration filter 114 is formed by etching a metal plate having a thickness of 0.15 mm to have a diameter of about 0.2 mm. Innumerable vent holes are further subjected to electrolytic polishing as post-processing to roughen the surface of the metal plate caused by rolling, and the edges of the vent holes created by etching and the inner surface of the vent. Since the roughness is composed of a metal filter whose surface is flattened to the micron order, the swirling flow can flow smoothly.

Further, as the material of the filtration filter 114, a resin or metal lattice network may be used. Further, as a substitute for the filtration filter 114, a small hole may be formed in the tube itself.

In addition, in the present embodiment, the first separating portion 111 is configured to generate a swirling air flow to separate the coarse dust and the air containing the fine dust. Separation may be performed.

Next, the second separation unit 122 that separates fine dust smaller than the ventilation holes of the filtration filter 114 and air separated in the first separation unit 111 will be described.

The air containing fine dust flows in from the inflow portion 171 from the tangential direction of the separation cylinder 121 so that a swirling airflow is easily generated in each separation cylinder 121, and swirls the inner wall surface of the separation cylinder 121 downward while vigorously rotating. Move to. The centrifugal force generated at this time separates air and fine dust. Then, the air separated from the fine dust rises in the central portion of the separation cylinder 121 and is exhausted from the exhaust port 105 through the exhaust pipe 141, and the fine dust is discharged from the fine dust disposal port 127 below the separation cylinder 121. It is discharged to the transfer space 125.

Here, the behavior of fine dust that has flowed into the separation cylinder 121 will be described based on the results of CAE.

As shown by the line C in FIG. 8A, when the surface of the spiral inclined portion 161 is not inclined in the radial direction of the exhaust pipe 141 from the inclined portion inner peripheral side 162 to the inclined portion outer peripheral side 163, separation is performed. A part of the fine dust that has flowed into the cylinder 121 is pushed by the air flow (arrow D) from the inflow portion 171, moves to the inner peripheral side 162 of the inclined portion, moves downward along the exhaust pipe 141, and then is discharged. It enters the exhaust pipe 141 from the cylinder inlet 191 and flows out from the dust collector 14 to the outside.

On the other hand, in the present embodiment, as indicated by the line E in FIG. 8B, the surface of the spiral sloped portion 161 rises in the radial direction from the sloped inner circumference side 162 toward the sloped outer circumference side 163. 8A, the fine dust moves to the outer peripheral side 163 of the inclined portion as compared with FIG. 8A. Therefore, even if the dust is pushed by the air flow from the inflow portion 171 (arrow F), Move away. Therefore, the fine dust moves downward while swirling in the separation cylinder 121 without entering the exhaust pipe 141 from the exhaust pipe inlet 191 and the fine dust is separated from the air. This makes it possible to prevent the separation performance of the dust collector 14 from decreasing.

In addition, as shown in FIG. 9A, when the bottom surface portion 172 of the inflow portion 171 is configured to be orthogonal to the exhaust pipe 141, the dust-containing air that has entered the exhaust pipe 141 from the inflow portion 171 is directed downward. Since the space 193 is open, it flows obliquely downward as indicated by an arrow G. Therefore, as shown by the line H, a part of the fine dust rides on the flow of the dust-containing air (arrow G) and moves diagonally downward, and can be separated from the air due to insufficient swirling force. Instead, it enters the exhaust pipe 141 from the exhaust pipe inlet 191 and flows out from the dust collector 14 to the outside.

On the other hand, in the present embodiment, as shown by the line I in FIG. 9B, the bottom surface portion 172 of the inflow portion 171 is inclined from the upstream side toward the downstream side upward, Since the dust once moves upward along the bottom surface portion 172 and then obliquely downward as shown by an arrow G′, it has a configuration in which a turning force is easily obtained as compared with the case of FIG. 9A. There is. Therefore, the fine dust moves downward while swirling in the separation cylinder 121 without entering the exhaust pipe 141 from the exhaust pipe inlet 191 and the fine dust is separated from the air. This makes it possible to prevent the separation performance of the dust collector 14 from decreasing.

Further, when the exhaust pipe 141 and the separation pipe 121 are combined, the inflow part side face 181 of the inflow part 171 is configured to be flush with the exhaust pipe side face 182 of the exhaust pipe 141, and FIG. As indicated by the line J, a part of the fine dust that has flowed in from the vicinity of the inflow portion side surface 181 of the inflow portion 171 swirls along the exhaust pipe 141 and enters the exhaust pipe 141 as it is from the exhaust pipe inlet portion 191 to collect dust. It flows out of the device 14.

On the other hand, in the present embodiment, as shown in FIG. 7, when the exhaust cylinder 141 and the separation cylinder 121 are combined, the inflow part side surface 181 of the inflow part 171 projects more than the exhaust cylinder side surface 182 of the exhaust tube 141. Since it is configured as described above, the fine dust moves downward while turning at a position away from the exhaust pipe 141, as indicated by a line K in FIG. Therefore, the fine dust moves downward while swirling in the separation cylinder 121 without entering the exhaust pipe 141 from the exhaust pipe inlet 191 and the fine dust is separated from the air. This makes it possible to prevent the separation performance of the dust collector 14 from decreasing.

Further, when the exhaust pipe 141 is formed in a substantially cylindrical shape, a part of fine dust descends along the exhaust pipe 141 as indicated by a line L in FIG. Enters the exhaust pipe 141 and flows out from the dust collector 14 to the outside.

On the other hand, in the present embodiment, as shown by the line M in FIG. 11B, a part including the exhaust pipe inlet portion 191 has a tapered shape in which the outer diameter on the lower side is smaller than the outer diameter on the upper side. Since the tapered portion 192 is provided, fine dust swirls at a position away from the exhaust pipe 141. Therefore, the fine dust moves downward while swirling in the separation cylinder 121 without entering the exhaust pipe 141 from the exhaust pipe inlet 191 and the fine dust is separated from the air. This makes it possible to prevent the separation performance of the dust collector 14 from decreasing. Here, when not the part of the exhaust pipe 141 but the whole is tapered, the space 194 between the exhaust pipe 141 and the separation pipe 121 becomes wider, and the velocity of the dust-containing air passing through the space 194 becomes slower. Since the turning force is weakened, the separation performance may be deteriorated. Therefore, in the present embodiment, the tapered portion 192 is provided only in a part including the exhaust pipe inlet portion 191.

As described above, in the dust collector 14 of the present embodiment, a part of the fine dust enters the exhaust pipe 141 from the exhaust pipe inlet 191 by rotating the fine dust at a position away from the exhaust pipe 141. By preventing the airflow exhausted to the outside of the dust collecting device 14 from flowing out to the outside of the dust collecting device 14, it is possible to suppress the deterioration of the separation performance of the dust collecting device 14.

In the vacuum cleaner of the present invention, the air containing dust is sufficiently separated from the air, and thereafter the air enters the exhaust pipe from the exhaust pipe inlet portion and is discharged upward, thereby suppressing deterioration of dust separation performance. Therefore, the present invention can be applied not only to the stick type, but also to a handy type vacuum cleaner, a canister type vacuum cleaner, and the like.

10 Vacuum Cleaner 11 Vacuum Cleaner Main Body 12 Suction Tool 13 Pipe 14 Dust Collector 15 Electric Blower Case 16 Filter 17 Main Body Exhaust Port 18 Battery Case 19 Fine Dust Storage Unit 102 Case 104 Dust Discharge Lid 105 Exhaust Port 107 Inlet 108 Hinge 111 First Separation Section 112 Coarse Dust Storage Section 113 Case Top 114 Filtration Filter 115 Space 116 Case Bottom 117 Hollow Cylinder 121 Separation Tube 122 Second Separation Section 123 Waste Port 125 Fine Dust Transfer Space 126 Bottom 127 Fine Dust Disposal Port 141 Exhaust Tube 151 Lid Part 161 Inclined Part 162 Inclined Part Inner Side 163 Inclined Part Outer Side 171 Inflow Part 172 Bottom Part 181 Inflow Part Side 182 Exhaust Cylinder Side 191 Exhaust Cylinder Inlet 192 Tapered Part 193 Space 194 Space

Claims (4)

A vacuum cleaner body containing an electric blower,
A dust collector that is detachably provided on the cleaner body and that separates and collects dust from dust-containing air sucked by the electric blower,
The dust collector includes a first separating unit that separates dust and air, and a second separating unit that separates dust in the dust-containing air that has passed through the first separating unit by a centrifugal separation method,
The second separation section includes a separation tube, an inflow section that introduces dust-containing air into the separation tube from above, and an exhaust tube that is disposed in the separation tube and that exhausts air after dust separation. Have,
The exhaust stack has an exhaust stack inlet part for introducing air after dust separation, and an exhaust port for discharging the air introduced from the exhaust stack inlet part,
The outer surface of the exhaust pipe has an inclined portion that spirally descends from the exhaust port direction toward the exhaust pipe inlet portion, and the surface of the inclined portion is from the inner peripheral side to the outer peripheral side in the radial direction of the exhaust pipe. An electric vacuum cleaner characterized in that the surface is inclined toward the upward direction toward. A vacuum cleaner body containing an electric blower,
A dust collector that is detachably provided on the cleaner body and that separates and collects dust from dust-containing air sucked by the electric blower,
The dust collector includes a first separating unit that separates dust and air, and a second separating unit that separates dust in the dust-containing air that has passed through the first separating unit by a centrifugal separation method,
The second separation section includes a separation tube, an inflow section that introduces dust-containing air into the separation tube from above, and an exhaust tube that is disposed in the separation tube and that exhausts air after dust separation. Have,
The exhaust stack has an exhaust stack inlet part for introducing air after dust separation, and an exhaust port for discharging the air introduced from the exhaust stack inlet part,
An electric vacuum cleaner, wherein a bottom surface portion of the inflow portion is inclined upward from the upstream side toward the downstream side. A vacuum cleaner body containing an electric blower,
A dust collector that is detachably provided on the cleaner body and that separates and collects dust from dust-containing air sucked by the electric blower,
The dust collector includes a first separating unit that separates dust and air, and a second separating unit that separates dust in the dust-containing air that has passed through the first separating unit by a centrifugal separation method,
The second separation section includes a separation tube, an inflow section that introduces dust-containing air into the separation tube from above, and an exhaust tube that is disposed in the separation tube and that exhausts air after dust separation. Have,
The exhaust stack has an exhaust stack inlet part for introducing air after dust separation, and an exhaust port for discharging the air introduced from the exhaust stack inlet part,
An electric vacuum cleaner, wherein a side surface of the inflow portion is projected from a side surface of the exhaust stack. The part of the exhaust pipe including the exhaust pipe inlet is tapered such that the outer diameter on the lower side is smaller than the outer diameter on the upper side. Vacuum cleaner.