JP2012249824A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone dust collection device that has a dust collection chamber constructed as a separate chamber from a swirling chamber, can smoothly guide dust by air to the dust collection chamber, and has further improved dust separation performance.SOLUTION: The cyclone vacuum cleaner includes: the swirling chamber 1 having an exhaust pipe 6 provided near the center thereof, and an air suction opening 5 provided such that the air flows in a tangential direction of an outer frame; and the dust collection chamber 2 for separating and collecting dust from the swirling chamber 1. In the cyclone vacuum cleaner, the swirling chamber 1 and the dust collection chamber 2 are axially displaced in parallel, a partition wall 8 is provided for relatively defining and forming an lower portion of the swirling chamber 1 and an upper portion of the dust collection chamber 2, an inlet opening 10 and an outlet opening 11 communicating with the dust collection chamber 2 are provided in the partition wall 8, an arcuate partition wall 12 is provided near the bottom center of the swirling chamber 1 so that the inlet opening 10 for the dust collection chamber 2 and an opening end of the outlet opening 11 are connected, a swirling route 15 is provided between an outer peripheral inner wall and the partition wall 12 of the swirling chamber 1 to thereby reliably collect dust in a separate chamber from the swirling chamber 1, thus improving the dust separation performance.

Description

  The present invention relates to a cyclone dust collecting device for a vacuum cleaner.

  2. Description of the Related Art In recent years, a so-called cyclone type vacuum cleaner that attracts attention is a type of vacuum cleaner that imparts a swirling component to the airflow of suction air and separates and removes dust from the airflow by centrifugal force. In this type of vacuum cleaner, the dust collection case is provided with a swirl generation chamber that generates a swirling air flow, and a dust collection chamber that is separated from the swirl generation chamber and communicated with the swirl generation chamber. Is configured to move dust to a dust collection chamber, which is a separate chamber, and collect the dust (see Patent Document 1 and Patent Document 2).

Special table 2003-517908 gazette JP 2003-112082 A

  The configuration of Patent Document 1 includes a swirl generation chamber that swirls dust-containing air, and a dust collection unit that has an introduction portion that communicates with the inside of the swirl generation chamber, and a first end that communicates with the dust collection unit; The air return duct has a second end communicating with the inside of the swirl chamber, and is arranged so as to separate the communication port between the inlet of the dust collection chamber and the air return duct. In addition, the second end of the air return duct communicating with the swirl generation chamber is configured to flow at an acute angle with respect to the swirl airflow direction in the swirl generation chamber. Due to the pipe loss at the introduction part to the dust chamber and the air return duct, sufficient negative pressure cannot be generated in the dust collection chamber, the flow velocity from the swirl generation chamber to the dust collection chamber decreases, and smooth dust Cannot be transported. Also, in order to separate the communication port of the introduction part to the dust collection chamber and the communication port of the air return duct of the dust collection chamber, and the communication from the air return duct to the swirl generation chamber, the swirl air flow direction in the swirl generation chamber In order to flow at an acute angle, the flow from the swirl generation chamber to the introduction part → dust collection chamber → air return duct, and finally, a series of paths returning to the swirl generation chamber will be bent. As a result, sag occurs and flow path pressure loss occurs, which also affects the air transfer of dust from the swirl generation chamber to the dust collection chamber. If this dust transfer cannot be performed reliably, the dust-containing air will continue to swirl in the swirl chamber, and the dust separation performance will be reduced.

Moreover, although it is in the structure of patent document 2, this structure is provided in the cylindrical turning chamber which turns dust-containing air, the inlet port formed in the tangential direction of the turning chamber, and the bottom center part of the turning chamber. The exhaust port, the dust collection chamber provided adjacent to the side surface of the swirl chamber, and the swirl chamber and dust collection chamber provided on the side surface of the swirl chamber so as to overlap with the intake port in the swirl axis direction. The communication hole is provided with an outlet that flows into the dust collecting chamber from the swirling upstream side, and an inlet that returns from the dust collecting chamber to the swirling chamber on the downstream side of the swirling chamber. The opening height of the mouth, the height of the swirl chamber, and the opening height of the communication hole (inlet / outlet) to the dust collection chamber are almost the same height, so the airflow flowing from the intake port and the swirl chamber from the dust collection chamber Since the airflow returning to the air collides, turbulent flow occurs, and the flow toward the exhaust port is near the collision. Flowed into the still swirling chamber dust as it is the exhaust port side was riding the airflow to turning a result, it becomes that not lead to sufficient dust separation. In addition, since the air inlet and the outlet and inlet to the dust collection chamber are at the same height, the horizontal component acts strongly on the airflow entering the dust collection chamber from the swirl chamber. The swirling airflow after entering the chamber will go directly to the inlet to the swirling chamber, and in this case, especially for minute dust, it will not separate from the air and fall to the bottom of the dust collecting chamber. As it is, it gets on the airflow from the inlet and returns to the swirl chamber side. Furthermore, in the dust collection chamber, the cylindrical shape of the swirl chamber bites into the vicinity of the communication port, so that dust is separated from the air by swirling the airflow near the inlet from the dust collection chamber to the swirl chamber side. However, since it acts in the direction in which the airflow is attracted to the swirl chamber side, the frequency of the dust-containing air that flows back to the swirl chamber side increases, which leads to a decrease in dust separation.

  The present invention solves the above-described conventional problems, and even if the dust collecting chamber is configured to be a separate chamber from the swirling chamber, the dust is smoothly pneumatically transported from the swirling chamber side to the dust collecting chamber side by the swirling airflow. And a vacuum cleaner equipped with a cyclone dust collector with further improved dust separation.

  To achieve the above object, an electric vacuum cleaner according to the present invention includes an electric blower for sucking dust and a dust collecting case for collecting dust collected by suction, and the dust collecting case includes dust. In a cyclone cleaner provided with a substantially cylindrical swirl chamber for swirling air and a substantially cylindrical dust collection chamber for separating and collecting dust from the swirl chamber, the swirl chamber and the dust collection chamber are The swirl chamber has a structure in which the center of the shaft is displaced in parallel and the lower portion of the swirl chamber and the upper portion of the dust collection chamber are in communication with each other, and the swirl chamber and the dust collection chamber are opposed to each other. The dust-containing airflow swirling in the dust collection chamber flows along the inner wall surface of the swirl chamber and the airflow swirling in the dust collection chamber along the inner wall surface of the dust collection chamber. However, an outlet is provided for re-inflow into the swirl chamber. An intake port for taking in air, an exhaust pipe provided with a vent on the outer peripheral surface for discharging the separated air arranged near the center of the swirl chamber, and the position of the inlet / outlet to the dust collection chamber An arcuate partition wall is formed near the bottom center of the swirl chamber so as to connect the opening edge of the inlet and the outlet to the dust collecting chamber. And a swirl path is formed between the outer peripheral inner wall surface of the swirl chamber and the partition wall.

  According to such an invention, the dust-containing air flowing in from the intake port smoothly draws the airflow to the adjacent dust collection chamber while swirling the passage defined by the swirl chamber wall, the exhaust pipe, and the partition wall. In addition, the air intake vent, the position of the vent of the exhaust pipe, and the inlet / outlet of the dust collection chamber are arranged with a level difference in order from the top. Since the bottom position of the dust collection chamber is diagonally downward, the swirling airflow turns obliquely downward from the swirl chamber inlet to the bottom of the dust collection chamber, Dust is reliably guided to the bottom in the dust collection chamber, and can be separated from the dust collection chamber disposed above the dust collection chamber to the outlet for returning the airflow to the swirl chamber. Furthermore, due to the difference in height between the inlet / exhaust vent position / inlet / outlet with the dust collection chamber, the inflow airflow from the intake port and the airflow returning from the dust collection chamber to the swirl chamber Is generated below the vent hole of the exhaust stack, so that it is possible to suppress the obstruction of the air flow from the swirl chamber to the dust collection chamber due to the influence of the turbulent flow generated by the collision. Dust transportability can be ensured, and dust can be collected in a separate chamber from the swirl chamber, so that the dust-containing air does not continue to swirl in the swirl chamber. The performance can be further improved.

  In the cyclone dust collecting apparatus of the present invention, the dust collecting chamber is configured adjacent to the swirl chamber so as to be separated from the swirl chamber, and the swirling airflow is configured to flow obliquely downward. The dust can be smoothly pneumatically transported to the dust collection chamber side, and the dust can be reliably collected in a separate chamber from the swirl chamber, thereby further improving the separation between the dust and the air.

External appearance perspective view of cyclone dust collector showing this embodiment Central longitudinal sectional view in the same embodiment Cross-sectional view of the vicinity of the swirl chamber inlet in the same embodiment Cross-sectional view of swirl chamber and dust collection chamber in the same embodiment Partially broken view showing the flow state of the swirling airflow in the same embodiment Partial configuration diagram showing a turning path portion in the same embodiment Central longitudinal sectional view showing the garbage disposal operation in the same embodiment The fragmentary sectional view which shows the ventilation grid hole shape in other embodiment Furthermore, the partially broken figure which shows the flow state of the whirling airflow in other embodiment Furthermore, the partially broken figure which shows the flow state of the whirling airflow in other embodiment

  1st invention arrange | positions the electric blower for attracting | sucking dust, and the dust collection case which accumulate | stores the dust collected by suction | inhalation, and the substantially cylindrical turning which makes the dust collection case swirl the air containing dust And a cyclone vacuum cleaner provided with a substantially cylindrical dust collection chamber for separating and collecting dust from the swirl chamber, the swirl chamber and the dust collection chamber are displaced in parallel with each other in the axial center, and The lower part of the swirl chamber communicates with the upper part of the dust collection chamber, and the dust-containing airflow swirling the swirl chamber is located at a position where the swirl chamber and the dust collection chamber face each other. An inlet that flows into the dust collection chamber along the inner wall surface of the swirl chamber and an airflow swirling in the dust collection chamber reflows into the swirl chamber along the inner wall surface of the dust collection chamber. An air outlet is provided, and an intake port for taking dust-containing air into the swirl chamber, An exhaust pipe provided with a vent on the outer peripheral surface for discharging dust-separated air arranged near the center of the chamber, and the position of the inlet / outlet to the dust collecting chamber are arranged in order from the top In the vicinity of the bottom center of the swirl chamber, an arc-shaped partition wall is provided so as to connect the opening edge of the inlet and the outlet to the dust collecting chamber, and the outer peripheral inner wall surface of the swirl chamber And a turning path between the partition wall and the partition wall.

  As a result, the dust-containing air flowing in from the intake port can smoothly draw the air flow to the adjacent dust collection chamber while swirling the passage partitioned by the swirl chamber wall, the exhaust pipe, and the partition wall. In addition, the air intake port, the vent hole position of the exhaust pipe, and the inlet / outlet of the dust collecting chamber are arranged with a level difference in order from the top, and the dust collecting is done with respect to the inlet of the swirl chamber. Since the bottom position of the chamber is obliquely downward, the swirling airflow turns into the dust collecting chamber from the inlet of the swirling chamber toward the bottom portion of the dust collecting chamber. Thus, the dust is reliably guided to the bottom portion, and the dust can be separated from the dust collection chamber disposed above the dust collection chamber to the outlet for returning the airflow to the swirl chamber.

  Furthermore, due to the difference in height between the inlet / exhaust vent position / inlet / outlet with the dust collection chamber, the inflow airflow from the intake port and the airflow returning from the dust collection chamber to the swirl chamber Is generated below the vent hole of the exhaust stack, so that it is possible to suppress the obstruction of the air flow from the swirl chamber to the dust collection chamber due to the influence of the turbulent flow generated by the collision. Dust transportability can be ensured, and dust can be collected in a separate chamber from the swirl chamber, so that the dust-containing air does not continue to swirl in the swirl chamber. The performance can be further improved.

  In the second aspect of the invention, a part of the dust collection chamber is overlapped with the inside of the swirl chamber. Thereby, the dust collection chamber remains a uniform substantially cylindrical surface. Without disturbing the swirlability, and also in the swirl chamber, the swirl airflow path is formed by the partition wall formed in the communication portion between the swirl chamber and the dust collecting chamber, so the flow of the swirl airflow is obstructed Therefore, the dust collection case can be reduced in size.

According to a third aspect of the present invention, an exhaust pipe disposed near the center of the swirl chamber and a partition wall connecting the inlet / outlet to the dust collecting chamber provided near the bottom center of the swirl chamber are connected. Yes, this
Since there is no airflow generated in the center of the cylinder in the swirl chamber, turbulence caused by collision of airflow in the swirl chamber can be suppressed, and dust-containing air can be attracted more smoothly from the swirl chamber to the dust collection chamber. It becomes like this.

  According to a fourth aspect of the present invention, a second dust separation means for further separating the air that has passed through the exhaust pipe is disposed above the swirl chamber, and the dust separated by the second dust separation means is disposed inside the exhaust pipe, The inside of the partition wall communicates with the fine dust box provided below the swirl chamber and is stored so that each dust separated in two stages is stored in the dust collecting case. Since they can be stored side by side at the bottom, when the accumulated dust is thrown away, it can be processed at once.

  According to a fifth aspect of the present invention, a ventilation grid is provided at the outlet from the dust collection chamber to the swirl chamber, so that even if dust is on the airflow returning from the dust collection chamber to the swirl chamber, Can be filtered through a ventilation grid.

  According to a sixth aspect of the present invention, the hole shape of the vent lattice at the outlet is opened obliquely downward from the dust collection chamber toward the swirl chamber, whereby the air flow returning from the dust collection chamber to the swirl chamber is upward. Since the opening direction of the ventilation grid is symmetric with respect to the flow obliquely, dust does not adhere to the ventilation grid, and only dust-separated air passes.

  7th invention is comprised so that an outflow port may be arrange | positioned in a position higher than an inflow port, Thereby, the separability of the dust and air in a dust collection chamber can be improved.

  In the eighth aspect of the invention, the overlap with the vent hole formation range of the exhaust pipe is 40% or less with respect to the opening height of the intake port, and thereby, the swirling airflow is obliquely downward. The flowing airflow component can be reliably generated, and smooth dust transfer to the dust collecting chamber side by the swirling airflow can be performed.

(Embodiment 1)
The cyclone dust collector in embodiment of this invention is demonstrated using figures.

  FIG. 1 is an external perspective view of a cyclone dust collecting apparatus showing an embodiment of the present invention, and FIG. 2 is a sectional view thereof. As shown in the figure, the cyclone dust collecting apparatus includes a dust collecting case 3 including a swirling chamber 1 that takes in air containing dust and generates a swirling airflow, a dust collecting chamber 2 that accumulates dust, and a second dust separating means. The second dust collecting case 4 is built in and is disposed above the dust collecting case 3 and connects the dust collecting case 3 and a vacuum cleaner body (not shown) incorporating an electric blower (not shown). ing.

  The swirl chamber 1 of the dust collection case 3 communicates with an intake port 5 having a suction passage attached so as to be in a tangential direction with respect to the outer circumferential circle of the substantially cylindrical cylindrical body, and communicated with the second dust collection case 4 at the center. A substantially cylindrical exhaust cylinder 6 is arranged. A ventilation portion 7 made of a filtration filter such as a mesh filter or an etching filter is formed on the outer peripheral side surface of the exhaust tube 6 to prevent coarse dust from passing through to the second dust collection case 4 side. In the swirl chamber 1, the positional relationship between the intake port 5 and the exhaust pipe 6, and the flow from the intake port 5 along the cylindrical inner wall of the swirl chamber 1 (FIG. 3), the swirl chamber 1 as a straight airflow from the intake port 5. The dust-containing air that has flowed into the air turns as a swirling airflow. The inner space of the exhaust tube 6 communicates with the second dust collection case 4, and the air that has passed through the ventilation part 7 of the exhaust tube 6 flows to the second dust collection case 4.

Next, as shown in the figure, the dust collection chamber 2 is configured so that a substantially cylindrical dust collection chamber 2 having an inner diameter substantially equal to the inner diameter of the swirl chamber 1 is placed below the swirl chamber 1 with the respective central axes in parallel. It is arranged at a shifted position, and a part of the upper end of the dust collection chamber 2 is bitten into the swirl chamber 1. That is, as shown in FIG. 4, the portion overlapping the swirl chamber 1 and the dust collection chamber 2 is provided with a partition wall 8 having a concave shape on the swirl chamber 1 side and a substantially cylindrical shape on the dust collection chamber 2 side. Then, on the one side where the outer periphery of the swirl chamber 1 and the outer periphery of the dust collection chamber 2 intersect, a straight wall 9 is provided so as to contact each other's outer peripheral circle, and the side surface portion of the partition wall 8 is the swirl chamber 1. A communication port is provided in the vicinity of both sides intersecting the outer periphery of each of the two, and the edge of each communication port is made to coincide with the outer peripheral wall. Here, one of the two communication ports is an inlet 10 through which the airflow swirling in the swirl chamber 1 flows into the dust collection chamber 2, and the other is an airflow returning from the dust collection chamber 2 to the swirl chamber 1. The inflow port 10 is configured as the outflow port 11, and the inflow port 10 is configured on the side provided with the linear wall 9 that connects the outer periphery of the swirl chamber 1 and the outer periphery of the dust collection chamber 2. .

  Further, a partition wall 12 is provided so as to extend the bottom of the exhaust tube 6 of the swirl chamber 1 to the bottom surface, and the partition wall 12 and the partition wall 8 of the dust collection chamber overlap each other. It opens in the range from the ridgeline where the outer peripheral wall of the swirl chamber 1 and the dust collection chamber 2 intersects to the ridgeline where the partition wall 8 and the partition wall 12 of the dust collection chamber intersect. In addition, the outlet 11 is formed with a ventilation grid 13 in which the size of the opening between the grids is set to 1 mm to 2 mm, and the bottom portion of the dust collecting chamber 2 is open and pivotally supported. The bottom lid 14 is closed while ensuring air tightness. From the experimental results, it can be seen from the experimental results that when the size of the opening front is set to 3 mm or more, fine dust such as lint tends to pass through the swirl chamber 1 without being caught by the lattice. However, when the opening front was set to 2 mm, lint was caught on the lattice, and the passage to the swirl chamber 1 side could be greatly suppressed. It is said.

  As shown in FIG. 2, the intake port 5 of the swirl chamber 1, the ventilation portion 7 of the exhaust pipe 6, and the inflow port 10 / outlet port 11 that communicates the swirl chamber 1 and the dust collection chamber 2 have height in order from the top. As a result, the dust-containing air that has flowed in from the intake port 5 enters the inlet 10 while swirling the swirl chamber 1 obliquely downward from the intake port 5 and is extended and collected. It flows to the bottom position of the dust collecting chamber while turning in the dust chamber 2 obliquely downward. The heavy coarse dust continues to swirl as it is in the bottom portion of the dust collecting chamber 2, and the airflow from which the coarse dust is separated rises while swirling, and fine dust such as lint riding on this ascending airflow is discharged from the outlet. The air in a state where the air is caught in the ventilation grid 13 and further separated by dust passes through the ventilation grid 13 and returns to the swirl chamber 1. It flows to the dust collecting case 4 (FIG. 5). Here, in the dust collection chamber 2, when coarse dust keeps swirling at the bottom position due to its weight, it will solidify like marimo while entangled, and fine dust will also get entangled there together. Dust and air are separated. Next, the dust flowing in the dust collection chamber 2 toward the outlet 11 is somewhat covered with fine dust such as lint, but the lint is caught by the ventilation grid 13 at the 2 mm gap and it is If it accumulates, a lint will act as a filter and the passage of fine dust to the swirl chamber 1 side can be further suppressed. That is, when lint accumulates, it becomes a state similar to a nonwoven fabric filter.

  Thus, in the swirl chamber 1, a swirl path 15 leading to the inlet 10 to the dust collection chamber 2 is formed between the exhaust pipe 6 / the partition wall 12 and the outer peripheral wall (FIG. 6). Thus, the swirling airflow can be guided from the swirling chamber 1 to the dust collecting chamber 2 more smoothly. In the conventional cyclone configuration, the swirl chamber 1 and the dust collection chamber 2 are generally arranged coaxially. However, even if the swirl chamber 1 and the dust collection chamber 2 are displaced in parallel, the swirl chamber 1 And the dust collection chamber 2 are arranged vertically, that is, in an oblique vertical direction, and an air flow inlet and outlet are provided between the swirl chamber 1 and the dust collection chamber 2 so as to draw an elliptical orbit. Thus, it becomes possible to form a centrifugal swirl air flow similar to a general cyclone air flow.

In the second dust collecting case 4, a non-woven filter 16 folded in a pleat shape is arranged as a second dust separating means, and minute fine dust that has come out of the exhaust tube 6 is placed in the non-woven filter 16. Only the air that has been filtered and cleaned passes through the nonwoven fabric filter 16 and is guided to the electric blower. Here, on the downstream side of the non-woven fabric filter 16, a dust remover (not shown) that gives shock vibration to the filter surface is attached, and after the suction operation, a linear drive built in a cyclone dust collector connected to the dust remover By reciprocating movement from a portion (not shown), the filter surface is hit with a dust remover, and fine dust adhering to the surface of the nonwoven fabric filter 16 is dropped by impact. The fine dust that has been knocked down passes through the inner space of the exhaust pipe 6 and the partition wall 12, and falls to the fine dust box 17 that communicates with the inside of the partition wall 12 provided below the swirl chamber 1. Here, the fine dust box 17 is disposed adjacent to the dust collection chamber 2, the bottom of the fine dust box 17 is opened, and is closed simultaneously with the dust collection chamber 2 by the bottom lid 14 (FIG. 7). .

  Further, in the hole shape of the ventilation grid 13 provided at the outlet port 11, if the hole shape is opened in a diagonally downward direction from the dust collection chamber 2 toward the swirl chamber 1 as shown in FIG. 8, the dust collection chamber 2. Since it becomes symmetrical with the direction of the airflow that swirls and rises, lint catching can be further suppressed.

  Furthermore, as shown in FIG. 9, if the height position of the outlet 11 of the dust collection chamber 2 is positioned higher than the inlet 10, the swirling air flow path that rises in the dust collection chamber 2 is long. Therefore, it is possible to improve the dust separation of fine dust riding on the rising airflow.

  Furthermore, as shown in FIG. 10, in the overlap between the opening of the intake port 5 and the ventilation part 7 of the exhaust pipe 6, the upper end of the ventilation part 7 of the exhaust pipe 6 is higher than the intake port lower edge. By arranging to be about 40%, it is possible to give a descending airflow component to the dust-containing airflow that has flowed into the swirl chamber 1, so the number of swirls in the swirl chamber 1 is reduced, and the dust collection chamber 2 It can be attracted to the inflow port 10 and the dust separation efficiency in the swirl chamber 1 can be improved.

  Here, in the present embodiment, the space 18 adjacent to the swirl chamber 1 and located above the dust collection chamber 2 (FIG. 2) is provided with the above-described linear drive unit for the dust remover, filter maintenance, and the like. It can be used to store a brush for use, and can be configured with the appearance of the cyclone dust collector refreshed in design.

  As described above, in the form in which the swirl chamber 1 and the dust collection chamber 2 are completely formed by only having a communication port with respect to the general cyclone form, the same centrifugal swirl trajectory as in the prior art is achieved by the above configuration. Can be formed, and it is possible to induce a swirling air flow to the dust collecting chamber 2 in a separate chamber so that dust is accumulated in the dust collecting chamber 2, so that the separation of air and dust is further improved. A cyclone dust collecting device can be realized.

  As described above, the cyclone dust collecting apparatus according to the present invention is provided with a dust collecting chamber that is communicated obliquely downward and in a separate chamber from a substantially cylindrical swirling chamber that swirls dust-containing air. The height position of the inflow / outflow to the cylinder / dust collection chamber and the partition wall that forms the swirl path at the inflow / outflow from the swirl chamber to the dust collection chamber are provided diagonally downward A swirling airflow is generated on the extension that connects the vicinity of the bottom of the dust collection chamber adjacent to the swirl chamber intake port from the air inlet of the swirl chamber, so that the airflow is smooth to the adjacent dust collection chamber. The dust is surely guided to the bottom in the dust collection chamber, and the dust is collected between the dust collection chamber located above the dust collection chamber and the outlet that returns the airflow to the swirl chamber. It can be separated and reliably collected in a separate chamber from the swirl chamber. For dust-containing air in the room will not continue to pivot, it is possible to further improve the dust separation properties.

DESCRIPTION OF SYMBOLS 1 Swirling chamber 2 Dust collection chamber 3 Dust collection case 4 2nd dust collection case 5 Intake port 6 Exhaust pipe 7 Ventilation part 10 Inlet port 11 Outlet port 12 Partition wall 13 Ventilation grid 15 Swivel path 17 Fine dust box

Claims (8)

An electric blower for sucking dust and a dust collecting case for collecting dust collected by suction are arranged, and the dust collecting case includes a substantially cylindrical swirling chamber for swirling air containing dust, and the swirling chamber In the cyclone vacuum cleaner provided with a substantially cylindrical dust collecting chamber for separating and collecting more dust, the swirling chamber and the dust collecting chamber are displaced in parallel with each other in the center of the axis, and below the swirling chamber. And the upper part of the dust collection chamber communicate with each other, and the dust-containing air flow swirling the swirl chamber is positioned at the position where the swirl chamber and the dust collection chamber face each other. An inflow port that flows into the dust collection chamber along the flow path, and an outflow port through which the airflow swirling in the dust collection chamber flows back into the swirl chamber along the inner wall surface of the outer periphery of the dust collection chamber, Inlet for taking dust-containing air into the swirl chamber, near the center of the swirl chamber The exhaust pipe provided with a ventilation part on the outer peripheral surface for discharging the arranged dust separated air, and the position of the inlet / outlet to the dust collecting chamber are arranged in order from above, In the vicinity of the bottom center of the swirl chamber, an arc-shaped partition wall is provided so as to connect the opening edge of the inlet and the outlet to the dust collection chamber, and the outer peripheral inner wall surface of the swirl chamber and the partition wall A vacuum cleaner configured to form a swivel path between the two. The electric vacuum cleaner according to claim 1, wherein a part of the dust collecting chamber is overlapped with the inside of the swirl chamber. The electricity according to claim 1 or 2, wherein an exhaust pipe arranged in the vicinity of the center of the swirl chamber is connected to a partition wall connecting the inlet / outlet to the dust collecting chamber provided near the bottom center of the swirl chamber. Vacuum cleaner. Above the swirl chamber, a second dust separation means for further separating the air that has passed through the exhaust pipe is disposed, and the dust separated by the second dust separation means is communicated with the inside of the exhaust pipe and the inside of the partition wall. And the vacuum cleaner of Claim 3 comprised so that it might guide to the fine dust Box provided in the downward direction of the said swirl | vortex chamber, and could be collected. The electric vacuum cleaner according to any one of claims 1 to 4, wherein a ventilation grid is provided at an outlet from the dust collection chamber to the swirl chamber. The vacuum cleaner according to claim 5, wherein the hole shape of the ventilation grid at the outlet is opened obliquely downward from the dust collection chamber toward the swirl chamber. The electric vacuum cleaner according to any one of claims 1 to 6, wherein the outlet is configured to be disposed at a position higher than the inlet. The vacuum cleaner according to any one of claims 1 to 7, wherein the vacuum cleaner is arranged so that an overlap with a vent hole formation range of the exhaust pipe is 40% or less with respect to an opening height of the intake port.