WO2014065095A1

WO2014065095A1 - Electric vacuum cleaner

Info

Publication number: WO2014065095A1
Application number: PCT/JP2013/076989
Authority: WO
Inventors: 雅俊佐藤; 近藤　大介; 諒太遠藤; 福島　忠史
Original assignee: 三菱電機株式会社; 三菱電機ホーム機器株式会社
Priority date: 2012-10-24
Filing date: 2013-10-03
Publication date: 2014-05-01
Also published as: JP5979242B2; TWI561201B; AU2013335959A1; AU2013335959B2; JPWO2014065095A1; TW201438658A

Abstract

Provided is an electric vacuum cleaner (1), wherein a dust collecting unit (12) comprises an inflow part case (12c), and a dust collecting part case (12d). A spin chamber (20), which spins air containing dust which is introduced therein and separates dust and dirt from this airflow containing dust, and an aperture (28), which discharges the separated dust and dirt from the spin chamber (20), are formed in the inflow part case (12c). The inflow part case (12c) is located within the dust collecting part case (12d). A dust collecting chamber (31), which retains the dirt and dust which is discharged from the spin chamber (20), is formed in a space which is formed between the dust collecting part case (12d) and the outer face of the inflow part case (12c).

Description

Electric vacuum cleaner

The present invention relates to a vacuum cleaner having a cyclone type dust collecting unit.

Conventionally, it has a dust collection unit with a swirl chamber, and by introducing and swirling an airflow mixed with dust sucked from the cleaning surface into the dust collection unit, air and dust are collected by centrifugal force. There exists a vacuum cleaner which isolate | separates and hold | maintains only dust inside a dust collection unit (for example, refer patent document 1).

Japanese Unexamined Patent Publication No. 2012-61093 (FIGS. 2 and 3)

However, the dust collecting unit that collects dust of such a dust collecting unit also serves as a swirling chamber that generates a swirling flow in the air mixed with dust introduced into the dust collecting unit. It is configured in shape. Therefore, in order to efficiently separate dust from the dust-mixed air, such a dust collection unit must be configured in a cylindrical shape for the dust collection container, and there are restrictions on the design and dimensions. There is a problem when miniaturizing a vacuum cleaner.

The present invention has been made to solve the above-described problems, and maintains the dust collection capacity of the dust collection unit, increases the degree of freedom in design and actual dimensions, and enables the vacuum cleaner to be miniaturized. It is for the purpose.

In order to solve the above problems, in a vacuum cleaner having a dust collection unit and a vacuum cleaner main body to which the dust collection unit is detachably attached, the dust collection unit includes an inflow portion case, and a dust collection portion case. The inflow portion case has a swirl chamber that swirls the dust-containing air introduced therein and separates the dust from the dust-containing airflow, and an opening that discharges the separated dust from the swirl chamber. An inflow portion case is located inside the dust collection portion case, and a space formed between the dust collection case and the outer surface of the inflow portion case holds the dust discharged from the swirl chamber. A dust collection chamber is formed.

According to the present invention, the degree of freedom of the shape of the dust collection unit is increased, and the size can be suppressed while maintaining the dust collection capacity, and the vacuum cleaner can be downsized in both visual and actual dimensions.

It is a figure which shows the vacuum cleaner in embodiment. It is a side view of the cleaner body in an embodiment. It is the external appearance perspective view which looked at the vacuum cleaner main body of the vacuum cleaner in embodiment from diagonally forward. It is the external appearance perspective view which looked at the vacuum cleaner main body of the vacuum cleaner in embodiment from diagonally back. It is the figure which removed the dust collection unit 12 from the state of FIG. FIG. 3 is a plan view of the dust collection unit 12 as viewed from the side attached to the main body 6. It is a center sectional view of the cleaner body in an embodiment. It is a perspective view of a dust collection unit. It is a disassembled perspective view of a dust collection unit. FIG. 13 is a DD cross-sectional view of FIG. 12. FIG. 13 is a perspective view of a DD section of FIG. 12. It is a top view of a dust collection unit. It is a side view of a dust collection unit. It is AA sectional drawing of FIG. FIG. 13 is a sectional view taken along line BB in FIG. It is a perspective view of the dust collection unit seen from the unit side outflow port. FIG. 13 is a perspective view of a CC section of FIG. 12. FIG. 13 is a comparative diagram comparing a cylindrical dust collecting unit and a CC cross section of FIG. 12. FIG. 13 is a schematic diagram of a CC cross section of FIG. 12.

Embodiment.
(Configuration of vacuum cleaner)
The embodiment will be described with reference to FIGS. As shown in FIG. 1, the vacuum cleaner 1 includes an attachment such as a suction port body 2 and an extension pipe 3, a connection pipe 4, a suction hose 5, and a cleaner main body 6 (hereinafter referred to as “main body 6”). Configured as The suction port body 2 is for sucking dust (dust) on the floor surface together with air from an opening formed downward. A connection portion 2 a for exhaust is provided at a substantially central portion in the longitudinal direction of the suction port body 2.

The end of one side (intake side) of the extension pipe 3 is connected to the connection part 2a of the suction port body 2. The extension pipe 3 is configured to be stretchable by combining

cylindrical members

3a and 3b having different inner diameters. One end (intake side) of the connection pipe 4 is connected to the other end of the extension pipe 3. The connection pipe 4 is made of a cylindrical member.

A handle 7 is provided on the connection pipe 4. The handle 7 is for the user of the vacuum cleaner 1 to hold and operate. The handle 7 is provided with an operation switch 8 for controlling the operation of the electric vacuum cleaner 1. One end (intake side) of the suction hose 5 is connected to the other end of the connection pipe 4. The suction hose 5 is made of a flexible bellows-shaped member.

(Configuration of vacuum cleaner body)
As shown in FIGS. 2 to 7, the main body 6 separates the dust from the air (dust-containing air) including the sucked dust, and discharges the air (clean air) from which the dust has been removed (for example, returned to the room) ) A hose connection port 9 is formed at the front end of the main body 6. The other end of the suction hose 5 is connected to the hose connection port 9 of the main body 6. Further, wheels 10 are attached to both sides and the lower surface of the main body 6.

The main body 6 includes a power cord 11. The power cord 11 has a cord plug 11a attached to one end and is wound around a cord reel portion (not shown) provided in the main body 6 from the other end. The cord plug 11a has a pair of blades that are inserted into the outlet. When the power cord 11 enters and exits from the inside of the main body and the power cord 11 is stored in the cord reel, the power cord outlet 6h where the cord plug 11a is located is arranged so that the user can easily pull out the power cord 11. An opening is formed in the upper part of the main body 6 toward the rear.

Note that the cord plug 11a is held at a position protruding from the power cord outlet 6h so that the user can easily grasp it. Such a cord plug 11a is connected to an outlet that is an external power supply source, thereby energizing an internal device such as an electric blower 13 described later. The electric blower 13 is driven by energization and performs a predetermined suction operation according to an operation on the operation switch 8.

The suction port body 2, the extension pipe 3, the connection pipe 4 and the suction hose 5 are formed in a continuous manner. When an electric blower 13 to be described later performs a suction operation, dust on the floor is sucked into the suction port body 2 together with air. The dust-containing air sucked into the suction port body 2 is sent to the main body 6 through the suction port body 2, the extension pipe 3, the connection pipe 4, and the suction hose 5 in this order. As described above, the suction port body 2, the extension pipe 3, the connection pipe 4, and the suction hose 5 form an air passage for allowing dust-containing air to flow into the main body 6 from the outside.

Next, a dust collecting unit 12 is detachably attached to the main body 6. FIG. 5 shows a state where the dust collection unit 12 is removed from the main body 6. The main body 6 includes an electric blower housing unit 6a and a dust collection unit housing portion 6b.

The electric blower housing unit 6a is made of a box-shaped member (for example, a molded product). The electric blower housing unit 6a has an upper surface formed obliquely so that a portion from the rear end portion to a predetermined position closer to the front side is higher in the rear and lower in the front. Moreover, the upper surface of the portion of the electric blower housing unit 6a in front of the predetermined position is formed obliquely so that the rear is lower and the front is higher.

Therefore, a part of the upper surface of the electric fan housing unit 6a is substantially concave when viewed from the side. The substantially concave portion of the electric blower housing unit 6a forms a dust collection unit housing portion 6b above the portion. The dust collection unit accommodating portion 6 b is a part for accommodating the dust collection unit 12. When the dust collection unit 12 is appropriately attached to the electric blower housing unit 6a, the main part of the dust collection unit 12 is disposed in the dust collection unit housing portion 6b, that is, above the electric blower housing unit 6a.

Further, the internal configuration of the main body 6 will be described with reference to FIG. In the electric fan housing unit 6a of the main body 6, an electric fan 13, a cord reel portion, and the like are housed. Further, an intake air passage 14 (FIG. 5) for guiding the dust-containing air flowing in from the hose connection port 9 to the dust collecting unit 12 is formed in the electric blower housing unit 6 a.

One end of the intake air passage 14 opens at the front surface of the main body 6 to form a hose connection port 9. The intake air passage 14 passes through the internal space of the electric blower housing unit 6a. The other end of the intake air passage 14 opens at the upper surface of the electric blower housing unit 6a (that is, the dust collection unit housing portion 6b side), and forms a main body side outlet 15. The main body side outlet 15 is disposed on the upper surface of the electric blower housing unit 6a near the rear end and one side.

Next, referring to FIG. 6, the dust collecting unit 12 is for separating the dust from the dust-containing air and temporarily storing the separated dust. The dust collecting unit 12 rotates dust-containing air inside to separate dust from air by centrifugal force. That is, the dust collection unit 12 has a cyclone separation function inside.

The unit side inlet 18 is open on the side surface of the dust collection unit 12. This unit side inlet 18 is an opening for introducing an airflow mixed with dust from the main body side outlet 15 into the dust collecting unit 12. A unit-side outlet 19 that opens downward is provided at the top of the dust collection unit 12. The unit side outlet 19 is an opening for exhausting the airflow separated from the dust inside the dust collecting unit 12 toward the electric blower housing unit 6a.

In the electric blower housing unit 6a, air discharged from the dust collection unit 12 (clean air from which dust is removed in the dust collection unit 12) in the main body 6 is guided to an exhaust port (not shown). An exhaust air passage 16 is formed. One end of the exhaust air passage 16 is opened at the upper surface of the electric blower housing unit 6a to form a main body side inlet 17.

The exhaust air passage 16 passes through the internal space of the electric blower housing unit 6a. The other end of the exhaust air passage 16 opens toward the outside of the electric blower housing unit 6a to form an exhaust port. The main body side inflow port 17 is disposed in the approximate center near the rear end portion in the upper part of the main body 6.

When the dust collecting unit 12 configured as described above is accommodated in the dust collecting unit accommodating portion 6b, the unit side inlet 18 and the main body side outlet 15 are replaced by the unit side outlet 19 and the main body side inlet. 17 are connected to face each other.

The electric blower 13 includes an air passage formed in the vacuum cleaner 1 (an air passage for allowing dust-containing air to flow into the main body 6, an intake air passage 14, an air passage in a dust collection unit 12 described later, exhaust air) This is for generating an air flow in the path 16). The electric blower 13 is disposed in the exhaust air passage 16 at a predetermined position near the rear end in the electric blower housing unit 6a.

When the electric blower 13 starts the suction operation, an air flow (suction air) is generated in each air passage formed in the electric vacuum cleaner 1. The dust-containing air sucked into the suction port body 2 is taken into the main body 6 from the hose connection port 9. The dust-containing air that has flowed into the main body 6 is sent from the main body side outlet 15 to the dust collecting unit 12 via the unit side inlet 18 via the intake air passage 14.

The airflow separated from the dust inside the dust collection unit 12 is discharged from the unit side outlet 19 toward the main body side inlet 17. Air (clean air) discharged from the dust collection unit 12 flows into the exhaust air passage 16 and passes through the electric blower 13 in the exhaust air passage 16. The air that has passed through the electric blower 13 further travels through the exhaust air passage 16 and is discharged from the exhaust port to the outside of the main body 6 (the electric vacuum cleaner 1).

(Dust collection unit 12)
Next, the dust collection unit 12 will be described in detail with reference to FIGS. As shown in each figure, the dust collection unit 12 has a substantially elliptic cylindrical shape as a whole, and the dust collection unit 12 includes a discharge part case 12a, a filter part case 12b, an inflow part case 12c, and a dust collection part case. 12d.

These discharge part case 12a, filter part case 12b, inflow part case 12c, and dust collecting part case 12d are formed of, for example, molded products. The discharge part case 12a, the filter part case 12b, the inflow part case 12c, and the dust collecting part case 12d are disassembled into the state shown in FIG. 9 or shown in FIG. 8 by a predetermined operation (for example, an operation on the lock mechanism). It is configured so that it can be assembled into a state. Further, only the dust collecting case 12d can be removed from the state shown in FIG.

Hereinafter, the dust collection unit 12 configured by appropriately combining the discharge unit case 12a, the filter unit case 12b, the inflow unit case 12c, and the dust collection unit case 12d will be described. In the following description of the dust collection unit 12, the upper and lower sides are specified based on the orientation shown in FIG.

As shown in FIGS. 10, 13, and 15, a unit-side inlet 18 is formed on one side of the inflow portion case 12 c of the dust collection unit 12. In addition, a unit side outlet 19 is formed substantially at the center of the discharge unit case 12a of the dust collection unit 12. The unit side outlet 19 is disposed at a position higher than the unit side inlet 18. The unit side inlet 18 and the unit side outlet 19 are opened facing the same side. The unit side outlet 19 is disposed at a position higher than the unit side inlet 18.

As shown in FIG. 14 and FIG. 15, the inflow portion case 12c is a portion for introducing dust-containing air from the outside, and has a swirl chamber 20 inside. The upper part of the swirl chamber 20 consists of a cylindrical part 20a. The lower part of the swirl chamber 20 is composed of a conical part 20b.

The cylindrical portion 20a has a hollow cylindrical shape. The cylindrical portion 20a is arranged so that the central axis faces the up-down direction. The conical portion 20b has a hollow conical shape with a tip portion cut off. The conical portion 20b is arranged in the vertical direction so that the central axis coincides with the central axis of the cylindrical portion 20a. The conical portion 20b is provided so that the upper end portion is connected to the lower end portion of the cylindrical portion 20a and extends downward from the lower end portion of the cylindrical portion 20a so that the diameter decreases as it goes downward.

A continuous space composed of the internal space of the cylindrical portion 20a and the internal space of the conical portion 20b thus formed constitutes the swirl chamber 20. The swirl chamber 20 is a space for swirling the dust-containing air introduced from the unit side inlet 18.

As shown in FIGS. 10 and 11, an inlet 21 is formed in the upper part of the cylindrical part 20 a (the uppermost part of the side wall forming the swirl chamber 20). One end of an inflow pipe 22 is connected to the inflow port 21. The other end of the inflow pipe 22 is connected to the unit side inlet 18.
The inflow pipe 22 is for guiding the dust-containing air that has passed through the intake air passage 14 to the inside of the cylindrical portion 20a (the swirl chamber 20). The internal space of the inflow pipe 22 forms an inflow air path. The inflow air passage is an air passage for allowing dust-containing air to flow into the swirl chamber 20 from the intake air passage 14.

The inflow pipe 22 has, for example, a quadrangular cylindrical shape and is made of a straight line. The axis of the inflow pipe 22 is perpendicular to the central axis of the cylindrical portion 20a, and is arranged in the tangential direction of the cylindrical portion 20a (side wall of the swirl chamber 20).

Next, as shown in FIGS. 14, 15, and 17, a zero-order opening 28 is formed on the side wall of the cylindrical portion 20 a of the swirl chamber 20. The zero-order opening 28 is disposed below the unit-side inlet 18 in the central axis direction of the swirl chamber 20. More specifically, the zero-order opening 28 is disposed below the inflow port 21 in the central axis direction of the swirl chamber 20, that is, downstream of the swirl flow generated in the swirl chamber 20.

Next, the lower end portion of the conical portion 20b forming the swirl chamber 20 opens downward (in the direction of the central axis). This opening formed at the lower end of the conical portion 20 b is the primary opening 29. Therefore, the primary opening 29 is disposed downstream of the zero-order opening 28 in the swirling flow generated in the swirling chamber 20. A partition wall 30 is provided outside the conical portion 20b. The partition wall 30 has a substantially cylindrical shape having substantially the same diameter as the cylindrical portion 20a. The upper end of the partition wall 30 is connected to the vicinity of the connecting portion between the cylindrical portion 20a and the conical portion 20b.

Next, the dust collecting case 12d has a cup-like substantially elliptical cylindrical shape with the lower part closed and the upper part opened. The dust collecting part case 12d is disposed on the outer side and the lower side of the inflow part case 12c. That is, the cylindrical part 20a and the conical part 20b that form the swirl chamber 20 inside are located inside the dust collecting part case 12d. In this state, the lower side from the upper end of the zero-order opening 28 of the cylindrical portion 20a of the inflow portion case 12c, the entire conical portion 20b, and the partition wall 30 are accommodated in the dust collecting portion case 12d. Moreover, the lower end part of the partition 30 engages with the projection part formed in the bottom face of the dust collecting part case 12d. And the opening 121d of the dust collecting part case 12d is closed by a lid part 121c protruding in a flange shape from the outer peripheral surface of the inflow part case 12c.

Here, referring to FIG. 19, which is a schematic view of a cross section (cross section CC in FIG. 12) cut in the lateral direction at the position of the zero-order opening 28, the center O1 of the swirl chamber 20 and the center of the dust collector case 12d. The swirl chamber 20 is positioned inside the dust collecting unit case 12d so that O2 has a substantially matching positional relationship. Further, the zero-order opening 28 is directed in the direction of the minor axis YY ′ of the ellipse, which is a cross section of the dust collector case 12d.

That is, the interval a between the zero-order opening 28 and the inner surface of the dust collecting unit case 12d (the interval in which the dust collecting unit case 12d and the cylindrical portion 20a face the elliptical short axis YY ′ direction that is a cross section of the dust collecting unit case 12d. ) And the distance b between the outer surface position of the cylindrical portion 20a rotated 90 degrees with respect to the center O1 of the swirl chamber 20 and the inner surface of the dust collecting portion case 12d (the dust collecting portion case 12d and the cylindrical portion 20a are the dust collecting case. The interval facing the major axis XX ′ direction of the ellipse that is a cross section of 12d has a relationship of a <b.

The space formed between the inflow portion case 12c and the dust collecting portion case 12d is divided into two by the partition wall 30. Of the two spaces thus formed, the space formed outside the cylindrical portion 20a and the partition wall 30 is the zero-order dust collection chamber 31, and formed below and outside the conical portion 20b and inside the partition wall 30. The space is the primary dust collection chamber 32. That is, the space formed between the outer surface of the dust collecting unit case 12d and the inflow unit case 12c is the

dust collecting chambers

31 and 32 that hold the dust discharged from the swirl chamber.

The zero-order dust collection chamber 31 communicates with the zero-order opening 28 and surrounds the entire outer periphery of the swirl chamber 20. The zero-order dust collection chamber 31 extends downward from the zero-order opening 28. The primary dust collecting chamber 32 extends from below the primary opening 29 to the entire outer periphery of the conical portion 20b.

A mesh-shaped discharge port 34 is provided at the center of the upper end of the cylindrical portion 20a. The discharge port 34 is configured by a fine hole formed by opening a side wall and a part of the lower part of a tube having a substantially cylindrical shape in the upper part and a substantially conical shape in the lower part. For this reason, compared with the case where only the lower part of the pipe is opened to form the discharge port, the force for sucking the air flow in the swirl chamber 20 in the swirl direction is increased, and the swirl air flow in the swirl chamber 20 advances in the swirl direction. It becomes easy.

Therefore, the swirl force of the airflow in the upper part of the swirl chamber 20 is increased, and the separation performance can be further improved. The discharge port 34 and the unit side outlet 19 are communicated with each other by a discharge pipe 33. In other words, a part of the mesh-shaped discharge port 34 described above is constituted by a fine hole formed by opening a part of the side wall of the discharge pipe 33. The discharge pipe 33 is mainly formed by the discharge part case 12a. The discharge port 34 is formed in the filter part case 12b, and the upper end wall of the swirl chamber 20 is formed by a part of the bottom surface of the filter part case 12b.

When the dust collection unit 12 having the above-described configuration is appropriately attached to the dust collection unit housing portion 6b, the central axis of the swirl chamber 20 and the like is disposed obliquely according to the slope of the dust collection unit housing portion 6b. . The unit side inlet 18 and the unit side outlet 19 are arranged so as to face the slope, and the unit side inlet 18 is connected to the main body side outlet 15. The unit side outlet 19 is connected to the main body side inlet 17 (FIG. 7). In such a state, the zero-order opening 28 opens in the direction opposite to the main body 6, that is, in the upper surface direction R (FIGS. 2 to 4). Here, the upper surface direction R refers to a direction facing the direction opposite to the floor surface G direction when the cleaner is placed on the floor surface G.

Next, the function of the dust collection unit 12 having the above configuration will be described. When the suction operation of the electric blower 13 is started, the dust-containing air passes through the intake air passage 14 and reaches the main body side outlet 15 as described above. The dust-containing air sequentially passes through the main body side outlet 15 and the unit side inlet 18, and flows into the inflow pipe 22, that is, into the inflow air path. Dust-containing air that has flowed into the inflow air passage advances in the axial direction of the inflow pipe 22 (goes straight), passes through the inlet 21, and flows into the inside of the cylindrical portion 20a (swirl chamber 20). Such a route is indicated by a solid arrow as a route A in the figure.

The dust-containing air taken into the swirl chamber 20 from the inlet 21 forms a swirl airflow that rotates in a predetermined direction along the side wall in the swirl chamber 20. The whirling airflow flows downward due to the path structure and gravity while forming a forced vortex region near the central axis and a free vortex region outside the central vortex region. Centrifugal force acts on the dust contained in the swirling airflow (the airflow in the swirling chamber 20). For example, relatively bulky waste such as fiber waste and hair (hereinafter such waste is referred to as “garbage α”) is caused by this centrifugal force to cause the inner peripheral surface of the cylindrical portion 20a (the inner wall surface of the swirl chamber 20). The inside of the swirl chamber 20 falls while being pressed against. When the waste α reaches the height of the zero-order opening 28, it is separated from the swirling airflow, passes through the zero-order opening 28, and is sent to the zero-order dust collection chamber 31.

Here, referring to FIG. 19, the dust α discharged from the 0th-order opening 28 to the 0th-order dust collecting chamber 31 is discharged from the 0th-order opening 28 in the tangential direction of the cylindrical portion 20a due to the swirling airflow. The
In other words, the dust α is discharged from the zero-order opening 28 in the direction of the long axis XX ′ of the ellipse, which is the cross-sectional shape of the dust collector case 12d, so that the gap between the cylindrical portion 20a and the dust collector case becomes a wide portion. The zero-order dust collection chamber 31 flows to a relatively wide area. The dust α that has entered the zero-order dust collection chamber 31 from the zero-order opening 28 moves in the same direction as the direction of the airflow that swirls in the swirl chamber 20 (the swirl direction), while in the zero-order dust collection chamber 31. To fall. Then, the garbage α reaches the bottom of the zero-order dust collecting chamber 31 and is collected.

Garbage that has not entered the zero-order dust collection chamber 31 from the zero-order opening 28 rides on the airflow in the swirl chamber 20 and proceeds downward while swirling in the swirl chamber 20. Garbage with relatively small volume such as sand litter and fine fiber litter (hereinafter such litter is referred to as “garbage β”) passes through the primary opening 29. And garbage (beta) falls in the primary dust collection chamber 32, and is caught.

When the airflow swirling in the swirl chamber 20 reaches the lowermost part of the swirl chamber 20, its traveling direction is changed upward and it rises along the central axis of the swirl chamber 20. Note that the dust α and the dust β are removed from the air forming the updraft by the action described above. The airflow (clean air) from which the waste α and the waste β are removed passes through the discharge port 34 and is discharged out of the swirl chamber 20. The air discharged from the swirl chamber 20 passes through the discharge pipe 33 and reaches the unit side outlet 19. Then, the clean air sequentially passes through the unit side outlet 19 and the main body side inlet 17 and is sent to the exhaust air passage 16.

When the electric blower 13 performs the suction operation, the dust α is accumulated in the zero-order dust collecting chamber 31 and the dust β is accumulated in the primary dust collecting chamber 32 as described above. These dusts α and β can be easily discarded by removing the dust collecting case 12d from the dust collecting unit 12.

In the dust collection unit 12 configured as described above, the dust-containing air flows into the swirl chamber 20 from the inlet 21 so as to push the swirl airflow in the swirl chamber 20 sequentially from the rear. That is, the dust-containing air newly taken into the swirl chamber 20 flows into the swirl chamber 20 so as to accelerate the swirl airflow already formed in the swirl chamber 20.

For this reason, the swirl force in the swirl chamber 20 especially above the 0th-order opening 28 can be increased, and the function (separation performance) for separating dust (particularly relatively bulky dust α) is greatly improved. . Therefore, it is not necessary to provide another separation device upstream or downstream of the dust collection unit 12, the dust collection unit 12 can be reduced in size, and the size of the main body 6 and the vacuum cleaner 1 can be reduced. .

In addition, the swirl force above the 0th-order opening 28 in the swirl chamber 20 is large and the swirling airflow is difficult to descend. The component in the swirl direction of the airflow above the 0th-order opening 28 in the swirl chamber 20 is large. This means that the descending component of the airflow is small. Therefore, it is possible to suppress the dust α accumulated on the bottom surface of the zero-order dust collection chamber 31 from being rolled up and scattered by the airflow flowing into the zero-order dust collection chamber 31 and to improve the collection performance.

Furthermore, the dust collection unit 12 is configured to form independent dust spaces by forming

dust collection chambers

31 and 32 around the swirl chamber 20. Thereby, since the shape of the swirl chamber 20 is not affected by the shape of the

dust collection chambers

31 and 32, the shape of the

dust collection chambers

31 and 32 is not related to the cyclone separation performance for separating dust from the airflow in the swirl chamber 20. It has a configuration. Therefore, the dust collector case 12d having various shapes can be used. As a result, the dust collector case 12d can be easily reduced in size and the vacuum cleaner can be reduced, and the degree of freedom in design can be increased.

Furthermore, since the shape of the dust collector case 12d can be determined without degrading the cyclone performance as described above, by making the shape of the dust collector case 12d substantially elliptical as in the present embodiment, When mounted on the vacuum cleaner body, the overall height can be reduced. For example, as shown in FIG. 18, the height (ΔT) can be suppressed while maintaining the dust collection capacity, as compared with the case where the dust collection case is cylindrical (one-dot broken line).

Further, since the 0th-order opening 28 opens in the direction of the minor axis YY ′, the dust α discharged from the 0th-order opening 28 to the 0th-order dust collecting chamber 31 is affected by the swirling airflow and is therefore subjected to the 0th-order opening. It is discharged from the portion 28 in the tangential direction of the cylindrical portion 20a. In other words, the dust α is discharged from the zero-order opening 28 in the direction of the major axis XX ′ of the ellipse, which is the cross-sectional shape of the dust collector case 12d, so that the gap between the cylindrical portion 20a and the dust collector case becomes a wide portion. The zero-order dust collection chamber 31 is flowing to a relatively wide area. As described above, since the direction in which dust is discharged from the 0th-order opening portion 28 is directed to a wide space inside the 0th-order dust collection chamber 31, the discharged dust is less likely to stay near the 0th-order opening portion 28. It has become.

Furthermore, when the dust collection unit 12 is attached to the main body 6, the 0th-order opening 28 is configured to face upward. Therefore, the 0th-order opening 28 is added to the dust stored inside the dust collection unit 12. It can be set as the structure which is hard to block.

Furthermore, by configuring the dust collection unit 12 to have an elliptical cylindrical shape, the air flowing into the zeroth dust collection chamber 31 from the zeroth order opening 28 can be smoothly flowed, and noise can be prevented.

1 vacuum cleaner, 2 suction port, 3 suction pipe, 4 connection pipe, 5 suction hose, 6 vacuum cleaner body, 6a electric blower housing unit, 6b dust collecting unit housing, 7 handle, 8 operation switch, 9 hose connection Mouth, 10 wheels, 11 power cord, 12 dust collecting unit, 12a discharge section case, 12b filter section case, 12c inflow section case, 12d dust collection section case, 13 electric blower, 14 intake air passage, 15 main body side outlet, 16 exhaust air passage, 17 main body side inlet, 18 unit side inlet, 19 unit side outlet, 20 swirl chamber, 20a cylindrical part, 20b conical part, 21 inlet, 22 inflow pipe, 28 0th order opening, 29 Primary opening, 30 bulkhead, 31 0th dust collection chamber, 32 1st dust collection chamber

Claims

In a vacuum cleaner having a dust collection unit and a vacuum cleaner body to which the dust collection unit is detachably attached,
The dust collection unit has an inflow portion case and a dust collection portion case,
In the inflow part case,
A swirl chamber that swirls the dust-containing air introduced inside and separates the dust from the dust-containing airflow;
An opening for discharging the separated dust from the swirl chamber is formed,
The inflow part case is located inside the dust collecting part case,
An electric vacuum cleaner in which a dust collection chamber for holding dust discharged from the swirl chamber is formed in a space formed between the dust collection unit case and the outer surface of the inflow unit case.
The electric vacuum cleaner according to claim 1, wherein the dust collecting case is formed in an elliptic cylinder shape.
The electric vacuum cleaner according to claim 2, wherein the opening is open toward an elliptical short axis direction which is a cross-sectional shape of the dust collecting case.
The vacuum cleaner according to any one of claims 1 to 3, wherein the opening is opened upward in a state where the dust collection unit is attached to the vacuum cleaner body.