TW201438658A - Electric vacuum cleaner - Google Patents

Abstract

In a vacuum cleaner, a dust collecting unit has an inflow portion case and a dust collecting portion case, and a swirling chamber for swirling dust-containing air introduced inside to separate dust from a dust-containing air current and an opening for discharging the separated dust from the swirling chamber are formed in the inflow portion case. Further, the inflow portion case is located inside the dust collecting portion case. Still further, a dust collecting chamber for holding the dust discharged from the swirling chamber is formed in a space formed between the dust collecting portion case and an outer face of the inflow portion case.

Description

Electric vacuum cleaner

The present invention relates to an electric vacuum cleaner having a cyclonic dust collecting unit.

In the past, there has been an electric vacuum cleaner having a dust collecting unit that forms a swirling chamber, and a flow of dust mixed with dust sucked from the cleaning surface is introduced into the dust collecting unit and swirled, whereby the air is centrifugally driven. Separated from the dust, only the dust is left inside the dust collecting unit (for example, see Patent Document 1).

Advanced technical literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2012-61093 (Figs. 2 and 3)

However, the dust collecting portion of the dust collecting unit in the dust collecting unit also serves as a swirling chamber for generating a swirling flow in the dust-introduced air introduced therein, and the dust collecting portion is formed in a cylindrical shape in order to efficiently generate the swirling flow. . Therefore, in order to effectively separate the dust from the dust-laden air, the dust collecting unit must be formed in a cylindrical shape, which is limited in design and size, and is subjected to an electric vacuum cleaner. It becomes a problem when miniaturization occurs.

The present invention aims to solve the above problems, and aims to maintain dust collection. The unit's dust collection capacity, and increased freedom of design and actual size, while achieving the miniaturization of the electric vacuum cleaner.

In order to solve the above problems, in a vacuum cleaner including a dust collecting unit and a cleaner body that can detachably attach and detach the dust collecting unit, the dust collecting unit has an inflow portion casing and a dust collecting portion casing; Forming a later-described component: a swirling chamber that swirls into the interior of the dust-laden air and separates the dust from the dust-containing gas stream; and an opening that discharges the separated dust from the swirling chamber; the inflow housing is located in the set The inside of the dust casing; a dust collecting chamber that retains dust discharged from the swirling chamber is formed in a space formed between the dust collecting portion casing and the outer surface of the inflow portion casing.

According to the present invention, the degree of freedom of the shape of the dust collecting unit is increased, and the size of the dust collecting unit can be controlled while maintaining the dust collecting capacity, and the miniaturization of the electric vacuum cleaner can be realized visually and practically.

1‧‧‧Electric vacuum cleaner

2‧‧‧Inhalation body

2a‧‧‧Connecting Department

3‧‧‧ suction tube

3a, 3b‧‧‧ cylindrical members

4‧‧‧Connecting tube

5‧‧‧ suction hose

6‧‧‧ Vacuum cleaner body (body)

6a‧‧‧Electric fan storage unit

6b‧‧‧Dust collection unit

6h‧‧‧Power cord outlet

7‧‧‧Hands

8‧‧‧Operation switch

9‧‧‧Hose connector

10‧‧‧ Wheels

11‧‧‧Power cord

11a‧‧‧Wire plug

12‧‧‧Dust collection unit

12a‧‧‧Export housing

12b‧‧‧Filter housing

12c‧‧‧Inflow housing

121c‧‧‧盖部

12d‧‧‧dust collection housing

121d‧‧‧ openings

13‧‧‧Electric fan

14‧‧‧Inhalation airway

15‧‧‧ Body side outlet

16‧‧‧Exhaust air path

17‧‧‧ Body side inlet

18‧‧‧Unit side inlet

19‧‧‧ Unit side outlet

20‧‧‧Swing room

20a‧‧‧Cylinder

20b‧‧‧Cone

21‧‧‧Inlet

22‧‧‧Inflow pipe

28‧‧0 times opening

29‧‧1 times opening

30‧‧‧ next door

31‧‧0 times dust collection room

32‧‧1 times dust collection room

33‧‧‧Draining tube

34‧‧‧Export

Fig. 1 is a view showing an electric vacuum cleaner of an embodiment.

Fig. 2 is a side view showing the electric vacuum cleaner of the embodiment.

Fig. 3 is a perspective view showing the appearance of a cleaner body of the electric vacuum cleaner of the embodiment as seen obliquely from the front.

Fig. 4 is a perspective view showing the appearance of a cleaner body of the electric vacuum cleaner of the embodiment as seen obliquely from the rear.

Fig. 5 is a view in which the dust collecting unit 12 is removed from the state of Fig. 3.

Fig. 6 is a plan view of the dust collecting unit 12 viewed from one side mounted to the body 6.

Fig. 7 is a central sectional view showing the cleaner body of the embodiment.

Figure 8 is a perspective view of the dust collecting unit.

Figure 9 is an exploded perspective view of the dust collecting unit.

Fig. 10 is a cross-sectional view taken along line D-D of Fig. 12.

Fig. 11 is a perspective view showing a D-D section of Fig. 12.

Figure 12 is a plan view of the dust collecting unit.

Figure 13 is a side view of the dust collecting unit.

Figure 14 is a cross-sectional view taken along line A-A of Figure 13.

Fig. 15 is a cross-sectional view taken along line B-B of Fig. 12.

Fig. 16 is a perspective view of the dust collecting unit viewed from the unit side outflow port.

Fig. 17 is a perspective view showing a C-C section of Fig. 12.

Figure 18 is a comparison of the dust collecting unit of the cylinder and the C-C section of Fig. 12.

Fig. 19 is a schematic view showing a C-C section of Fig. 12.

Embodiment 1

(Composition of electric vacuum cleaner)

The embodiment will be described with reference to Figs. 1 to 7 . As shown in Fig. 1, the electric vacuum cleaner 1 is composed of an important component to be described later, such as an accessory such as the suction port body 2 or the extension pipe 3, a connection pipe 4, a suction hose 5, and a cleaner body 6 (hereinafter referred to as "body 6". "). The suction port body 2 is a device that sucks garbage (dust) on the ground together with air from an opening formed downward. A connecting portion 2a for exhausting is provided at a substantially central portion in the longitudinal direction of the suction port body 2.

The end of one side (suction side) of the extension pipe 3 is connected to the connection portion 2a of the suction port body 2. The extension tube 3 is configured to be freely expandable and contractable by combining cylindrical members 3a and 3b having different inner diameters. The other end of the extension pipe 3 is connected to the end of the side (the suction side) of the connection pipe 4. The connecting pipe 4 is composed of a cylindrical member.

A handle 7 is provided on the connecting tube 4. The handle 7 is a member for holding the operation of the user of the electric vacuum cleaner 1. An operation switch 8 for controlling the operation of the electric vacuum cleaner 1 is provided on the handle 7. The other end of the connecting pipe 4 is connected to the end of the suction hose 5 on the side (suction side). The suction hose 5 is made of a member having flexibility and exhibiting a bellows shape.

(Composition of the vacuum cleaner body)

As shown in Figures 2-7, the body 6 is used to separate the garbage from the air (dusty air) containing the inhaled garbage, and discharge the air (clean air) after the garbage is removed (for example, put it back indoors). ). A hose connection port 9 is formed at the front end of the body 6. The hose connection port 9 of the body 6 is connected to the other end of the suction hose 5. Further, the wheels 10 are mounted on both sides and the lower side of the body 6.

In addition, the body 6 has a power cord 11. The power cord 11 is provided with a wire plug 11a at one end thereof, and is wound around a wire reel portion (not shown) inside the body 6 from the other end side. Further, a pair of blade portions inserted into the socket protrude from the wire plug 11a. Further, the power cord 11 is taken in and out from the inside of the main body, and when the power cord 11 is received in the cord reel portion, the power cord of the cord plug 11a is taken out from the outlet 6h, opening toward the rear of the body 6, so that the user can easily pull out the power cord 11 .

Further, the wire plug 11a is maintained at a position protruding from the power source wire take-out port 6h so as to be easily grasped by the user. Such a wire plug 11a and made The socket of the external power supply source is connected, whereby the internal device such as the electric fan 13 to be described later is energized. The electric fan 13 is driven by energization, and a specific suction action is performed corresponding to the operation of the operation switch 8.

The suction port body 2, the extension pipe 3, the connecting pipe 4, and the suction hose 5 are formed as a continuous space inside. When the electric fan 13 to be described later performs the suction operation, the garbage on the ground is sucked into the suction port body 2 together with the air. The dust-containing air sucked into the suction port body 2 passes through the inside of the suction port body 2, the extension pipe 3, the connection pipe 4, and the suction hose 5, and is then sent to the body 6. In this way, the suction port body 2, the extension pipe 3, the connection pipe 4, and the suction hose 5 form an air path that allows the dust-containing air to flow from the outside into the inside of the body 6.

Next, the dust collecting unit 12 is attached to the body 6 in a detachable manner. The state in which the dust collecting unit 12 is detached from the main body 6 is as shown in Fig. 5. The main body 6 has an electric fan housing unit 6a and a dust collecting unit accommodating portion 6b.

The electric fan housing unit 6a is composed of a box-shaped member (for example, a molded article). The portion of the electric fan housing unit 6a from the rear end portion to a predetermined position near the front side is formed to be inclined upward so that the rear high front is low. Further, the portion of the electric fan housing unit 6a which is further on the front side than the predetermined position is formed such that the upper surface thereof is inclined so that the rear portion is low and the front portion is high.

Therefore, when viewed from the side, a portion of the upper surface of the electric fan housing unit 6a is slightly concave. The slightly concave portion of the electric fan housing unit 6a has a dust collecting unit accommodating portion 6b formed thereon. The dust collecting unit accommodating portion 6b is a portion for accommodating the dust collecting unit 12. When the dust collecting unit 12 is properly attached to the electric fan housing unit 6a, an important portion of the dust collecting unit 12 is disposed in the dust collecting unit accommodating portion 6b, that is, above the electric fan housing unit 6a.

Referring to Fig. 7, the internal structure of the body 6 will be described. In the electric fan housing unit 6a of the main body 6, the electric fan 13 or the electric wire reel portion or the like is received. Further, inside the electric fan housing unit 6a, an intake air passage 14 for introducing dust-containing air flowing from the hose connection port 9 into the dust collecting unit 12 is formed in the main body 6 (Fig. 5).

One end of the suction air passage 14 is opened in front of the body 6, and a hose connection port 9 is formed. The intake air passage 14 passes through the internal space of the electric fan housing unit 6a. Further, the other end of the intake air passage 14 is opened on the upper surface of the electric fan housing unit 6a (that is, on the side of the dust collecting unit accommodating portion 6b), and the main body side outflow port 15 is formed. The main body side outlet 15 is disposed on the upper surface of the electric fan housing unit 6a, and is closer to the rear end and closer to one side.

Next, referring to Fig. 6, the dust collecting unit 12 separates the garbage from the dusty air and temporarily retains the separated garbage. The dust collecting unit 12 swirls the dust-containing air internally, thereby separating the garbage from the air by centrifugal force. That is, the dust collecting unit 12 has a cyclone separation function inside thereof.

The unit side flow inlet 18 is open at the side of the dust collection unit 12. The unit side inflow port 18 is an opening that introduces a dust-laden airflow from the body side outflow port 15 into the inside of the dust collecting unit 12. Further, on the upper portion of the dust collecting unit 12, a unit side outflow port 19 that opens in the direction of the school is provided. The unit side outflow port 19 is an opening that exhausts the airflow separated from the dust inside the dust collecting unit 12 toward the electric fan housing unit 6a.

An exhaust air passage 16 is formed inside the electric fan housing unit 6a, and the air discharged from the dust collecting unit 12 (clean air for removing garbage in the dust collecting unit 12) is guided to the exhaust port (not shown) ). Exhaust air duct 16 One end is opened on the upper surface of the electric fan housing unit 6a, and a body side inflow port 17 is formed.

The exhaust air passage 16 passes through the internal space of the electric fan housing unit 6a. Further, the other end of the exhaust air passage 16 is opened toward the outside of the electric fan housing unit 6a to form an exhaust port. The body side flow inlet 17 is disposed at a slightly center of the upper portion of the body 6 near the rear side end.

When the dust collecting unit 12 configured as described above is housed in the dust collecting unit accommodating portion 6b, the unit side inlet 18 and the body side outlet 15 are opposed to the unit side outlet 19 and the body side inlet 17, respectively. connection.

The electric fan 13 is an air passage formed in the vacuum cleaner 1 (an air passage for allowing dust-containing air to flow into the inside of the main body 6, an intake air passage 14, and an air passage and exhaust of the dust collecting unit 12 to be described later) A device for generating an air flow in the air passage 16). The electric fan 13 is disposed in the exhaust air passage 16 in a predetermined position in the electric fan housing unit 6a near the rear end.

When the suction operation of the electric fan 13 is started, an air flow (suction wind) is generated in each of the air passages formed in the electric vacuum cleaner 1. The dust-laden air sucked into the suction port 2 enters the inside of the body 6 from the hose connection port 9. The dust-laden air that has flowed into the inside of the main body 6 passes through the intake air passage 14 and is sent from the main body side outflow port 15 to the dust collecting unit 12 through the unit side inflow port 18.

The airflow separated from the dust inside the dust collecting unit 12 is discharged from the unit side outflow port 19 toward the body side inflow port 17. The air (clean air) discharged from the dust collecting unit 12 flows into the exhaust air path 16 and passes through the electric fan 13 in the exhaust air path 16 . The air passing through the electric fan 13 further advances in 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 collecting unit 12 will be described in detail with reference to Figs. 8 to 18. As shown in the respective figures, the dust collecting unit 12 has a substantially elliptical cylindrical shape as a whole, and the dust collecting unit 12 is composed of a discharge unit casing 12a, a filter casing 12b, an inflow portion casing 12c, and a dust collecting portion casing 12d.

The discharge portion casing 12a, the filter case 12b, the inflow portion casing 12c, and the dust collecting portion casing 12d are made of, for example, a molded product. The discharge portion casing 12a, the filter case 12b, the inflow portion casing 12c, and the dust collecting portion casing 12d are configured to be decomposed into the first drawing by the predetermined operation (for example, the operation of the locking mechanism). State, or assembled as shown in Figure 8. Further, from the state shown in Fig. 8, only the dust collecting portion casing 12d can be removed.

Hereinafter, the dust collecting unit 12 configured by appropriately combining the discharge portion casing 12a, the filter casing 12b, the inflow portion casing 12c, and the dust collecting portion casing 12d will be described. In the description of the dust collecting unit 12 to be described later, the top and bottom are defined based on the direction shown in FIG.

As shown in Figs. 10, 13, and 15, a unit side inflow port 18 is formed on one side of the inflow portion casing 12c of the dust collecting unit 12. Further, a unit side outflow port 19 is formed at a slightly center of the discharge portion casing 12a of the dust collecting unit 12. The unit side outflow port 19 is disposed at a position above the unit side inflow port 18. The unit side flow inlet 18 and the unit side flow outlet 19 are open to the same side. The unit side outflow port 19 is disposed at a position above the unit side inflow port 18.

As shown in Figs. 14 and 15, the inflow portion casing 12c is a portion for introducing dust-containing air from the outside into the inside, and has a swirling chamber 20 therein. The upper portion of the swirling chamber 20 is constituted by a cylindrical portion 20a. The lower portion of the swirling chamber 20 is composed of a conical portion 20b.

The cylindrical portion 20a is formed in a hollow cylindrical shape. The cylindrical portion 20a is disposed such that its central axis faces the vertical direction. The conical portion 20b has a hollow conical shape in which the tip end portion is cut. The conical portion 20b is positioned above and below, such that its central axis coincides with the central axis of the cylindrical portion 20a. The upper end portion of the conical portion 20b is connected to the lower end portion of the cylindrical portion 20a, and is provided to extend downward from the lower end portion of the cylindrical portion 20a so that the diameter thereof is smaller as it goes downward.

The swirling chamber 20 is configured as a continuous space formed by the internal space of the cylindrical portion 20a and the internal space of the conical portion 20b. The swirling chamber 20 is a space for swirling the dust-containing air introduced by the unit side inflow port 18.

As shown in Figs. 10 and 11, the inflow port 21 is formed in the upper portion of the cylindrical portion 20a (the uppermost portion of the side wall of the swirling chamber 20 is formed). One end of the inflow pipe 22 is connected to the inflow port 21. The other end of the inflow pipe 22 is connected to the unit side flow inlet 18.

The inflow pipe 22 is a device for introducing dust-containing air that has passed through the intake air passage 14 into the inside of the cylindrical portion 20a (the swirling chamber 20). The inner space of the inflow pipe 22 forms an inflow air passage. The inflow air passage is an air passage for allowing dust-containing air to flow from the intake air passage 14 into the swirl chamber 20.

The inflow pipe 22 is formed of, for example, a quadrangular cylindrical shape and exhibits a material which is always in the present state. The inflow pipe 22 has a shaft that intersects the central axis of the cylindrical portion 20a perpendicularly and is disposed in a tangential direction of the cylindrical portion 20a (the side wall of the swirling chamber 20).

Then, as shown in Figs. 14, 15, and 17, the opening portion 28 is formed in the side wall of the cylindrical portion 20a of the swirling chamber 20. The zero-order opening portion 28 is disposed closer to the swirling unit than the unit-side inlet port 18. The chamber 20 is below the central axis direction. Further, the 0th opening portion 28 is disposed closer to the center axis of the swirling chamber 20 than the inflow port 21. The lower side of the direction, that is, the downstream side in the swirling flow generated in the swirling chamber 20 is disposed.

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

Then, the dust collecting portion casing 12d has a cup-shaped slightly elliptical cylindrical shape that is closed downward and opened upward. The dust collecting portion casing 12d is disposed on the outer side and the lower side of the inflow portion casing 12c. That is, the cylindrical portion 20a and the conical portion 20b which form the swirl chamber 20 inside are located inside the dust collecting portion casing 12d. In this state, the portion closer to the lower side than the upper end of the zero-order opening portion 28 of the cylindrical portion 20a of the inflow portion casing 12c, and the entire conical portion 20b and the partition wall 30 are housed in the dust collecting portion casing 12d. Further, the lower end portion of the partition wall 30 is engaged with a projection formed on the bottom surface of the dust collecting portion casing 12d. Further, the lid portion 121c that protrudes from the outer peripheral surface of the inflow portion casing 12c into a flange shape covers the opening 121d of the dust collecting portion casing 12d.

Here, FIG. 19 is a schematic view showing a cross section (the CC cross section of the twelfth portion) which is cut in the lateral direction at the position of the 0th opening portion 28. Referring to FIG. 19, the swirling chamber 20 is placed in the dust collecting portion casing 12d. The inside is such that the center O2 of the center O1 stage dust collecting portion casing 12d of the swirling chamber 20 has a slightly uniform positional relationship. Further, the 0th opening portion 28 faces the short axis YY' direction of the ellipse which is the cross section of the dust collecting portion casing 12d.

That is, at the 0th opening portion 28 and the inner surface of the dust collecting portion casing 12d The interval a (the dust collecting portion casing 12d and the cylindrical portion 20a are opposed to each other on the short axis YY' which is the ellipse of the section of the dust collecting portion casing 12d), and the rotation of the center O1 of the swirling chamber 20 as a reference The distance b from the outer surface of the cylindrical portion 20a after 90 degrees to the inner surface of the dust collecting portion casing 12d (the dust collecting portion casing 12d and the cylindrical portion 20a are in the ellipse as the section of the dust collecting portion casing 12d) The long axis XX' is spaced apart from each other), and the relationship between the two is a < b.

Further, the partition wall 30 divides the space formed between the inflow portion casing 12c and the dust collecting portion casing 12d into two. Among the two spaces thus formed, the space formed outside the cylindrical portion 20a and the partition wall 30 is the zero-order dust collecting chamber 31, and the space formed below and outside the conical portion 20b and inside the partition wall 30 is set once. Dust chamber 32. In other words, the space formed between the dust collecting portion casing 12d and the outer surface of the inflow portion casing 12c is the dust collecting chambers 31 and 32 in which the dust discharged from the swirling chamber is left.

The 0th dust collecting chamber 31 and the 0th opening portion 28 communicate with each other, and cover and surround the entire outer circumference of the swirling chamber 20. Further, the 0th dust collecting chamber 31 extends downward from the 0th opening portion 28. The primary dust collecting chamber 32 extends from the lower side of the primary opening portion 29 to the outer periphery of the conical portion 20b.

A sieve-shaped discharge port 34 is provided at the center of the upper end portion of the cylindrical portion 20a. The discharge port 34 is formed of a fine hole formed by a side wall of a tube having a slightly cylindrical shape and a slightly conical shape at the lower portion and a portion of the lower portion. Therefore, in the case where the discharge port is formed only in the lower opening of the tube, the present invention strongly attracts the airflow in the swirl chamber 20 in the swirling direction, and the swirling airflow in the swirl chamber 20 is more likely to advance in the swirling direction.

Therefore, the swirling force of the airflow above the swirling chamber 20 can be increased, and the separation performance can be improved. Moreover, the discharge port 34 and the unit side flow out The port 19 is connected by a discharge pipe 33. In other words, a portion of the sieve-like discharge port 34 is constituted by fine holes formed by a part of the opening of the side wall of the discharge pipe 33. The discharge pipe 33 is mainly formed by the discharge portion casing 12a. Further, the discharge port 34 is formed by the filter housing 12b, and the upper end wall of the swirl chamber 20 is formed by a portion of the bottom surface of the filter housing 12b.

When the dust collecting unit 12 having the above-described configuration is appropriately attached to the dust collecting unit accommodating portion 6b, the center axis of the swirling chamber 20 or the like is disposed obliquely with the slope of the dust collecting unit accommodating portion 6b. Further, the unit side inflow port 18 and the unit side outflow port 19 are disposed to face the inclined surface, and the unit side inflow port 18 is connected to the main body side outflow port 15. The unit side flow outlet 19 is connected to the body side flow inlet 17 (Fig. 7). In this state, the zero-order opening portion 28 is opened in a direction opposite to the body 6 (that is, the upper direction R (second to fourth figure)). Further, the above-mentioned upper direction R is a direction opposite to the direction of the ground G in a state where the cleaner is on the floor G.

Next, the function of the dust collecting unit 12 having the above configuration will be described. As described above, when the electric fan 13 performs the suction operation, the dust-containing air passes through the intake air passage 14 and reaches the body-side outlet port 15. The dust-containing air sequentially flows into the inside of the inflow pipe 22 (that is, into the air passage) through the body side outflow port 15 and the unit side inflow port 18. The dust-containing air that has flowed into the air passage advances (straight in) in the axial direction of the inflow pipe 22, and flows into the inside of the cylindrical portion 20a (the swirling chamber 20) through the inflow port 21. A path like this is indicated by a solid arrow in the figure as path A.

The dust-containing air that has entered the swirling chamber 20 from the inflow port 21 is rotated in a predetermined direction along the side wall in the swirling chamber 20 to form a swirling airflow. The swirling airflow forms a forced vortex region near the central axis and a free vortex region outside, and It flows downward by the path structure and gravity. Moreover, centrifugal force acts on the refuse contained in the swirling airflow (air flow in the swirling chamber 20). For example, a relatively large-sized garbage such as fiber waste or hair (hereinafter referred to as "garbage α") is pushed by the centrifugal force to the inner peripheral surface of the cylindrical portion 20a (the inner wall surface of the swirling chamber 20). It falls in the swirling chamber 20 at the same time. When the garbage α reaches the height of the 0th opening portion 28, it is separated from the swirling airflow, and is sent to the 0th dust collecting chamber 31 through the 0th opening portion 28.

Here, referring to Fig. 19, the garbage α discharged from the 0th opening portion 28 to the 0th dust collecting chamber 31 is discharged from the 0th opening portion 28 in the tangential direction of the cylindrical portion 20a by the swirling airflow.

In other words, since the garbage α is discharged from the 0th opening portion 28 toward the long axis XX' direction of the ellipse which is the cross section of the dust collecting portion casing 12d, the gap which flows into the cylindrical portion 20a and the dust collecting portion casing is wide. The portion of the 0 dust collecting chamber 31 has a relatively large space. Then, the garbage α entering the dust collecting chamber 31 from the 0th opening portion 28 is moved in the same direction (the direction of the swirling direction) as the airflow swirling in the swirling chamber 20, and at the same time, in the 0 dust collecting chamber 31. When it falls, the garbage α reaches the bottom of the dust collecting chamber 31 and is replenished.

When there is no garbage that has entered the dust collecting chamber 31 from the 0th opening portion 28, the airflow in the swirling chamber 20 is multiplied in the swirling chamber 20 while moving downward while advancing. A relatively small volume of garbage such as sand garbage or fine fiber waste (hereinafter referred to as "garbage β") passes through the opening portion 29 once. Then, the garbage β is dropped in the primary dust collecting chamber 32 and is added.

The airflow swirling in the swirling chamber 20, when it reaches the lowermost portion of the swirling chamber 20, changes its direction to face upward, along the central axis of the swirling chamber 20 Rise. Further, by the action described above, the garbage α and the garbage β have been removed from the air forming the updraft. The airflow (purified air) from which the garbage α and the garbage β are removed is discharged to the outside of the swirling chamber 20 through the discharge port 34. The air discharged from the swirl chamber 20 passes through the discharge pipe 33 and reaches the unit side outflow port 19. Further, the clean air is sequentially sent to the exhaust air passage 16 through the unit side outflow port 19 and the main body side inflow port 17.

As described above, the suction operation is performed by the electric fan 13, and the garbage α is concentrated and placed in the zero dust collecting chamber 31, and the garbage β is concentrated and placed in the primary dust collecting chamber 32. The garbage α and the garbage β can be easily discarded by detaching the dust collecting portion casing 12d from the dust collecting unit 12.

In the dust collecting unit 12 configured as described above, the dust-containing air pushes the swirling air in the swirling chamber 20 forward from the rear, and flows into the swirling chamber 20 from the inflow port 21. That is, the dusty air newly entering the swirling chamber 20 accelerates the swirling airflow that has been formed in the swirling chamber 20, such as into the swirling chamber 20.

Therefore, it is possible to increase the swirling force in the swirling chamber 20, in particular, above the 0th opening portion 28, thereby greatly improving the function (separation performance) of separating the garbage (especially the bulky garbage α). Therefore, it is not necessary to provide another separation device on the upstream side or the downstream side of the dust collection unit 12, and the size of the dust collection unit 12 can be reduced, and the volume of the main body 6 and the vacuum cleaner 1 can be reduced.

Further, in the swirling chamber 20, above the zero-opening portion 28, the swirling force is large and the swirling airflow is hard to fall, that is, in the swirling direction of the airflow in the swirling chamber 20 above the zero-opening portion 28. The composition is large, and the falling component of the gas stream is small. Therefore, it is possible to suppress the flow of the garbage α accumulated in the bottom surface of the zero-thickness chamber 31 by the airflow flowing into the zero-throw chamber 31, and to improve the recruitment performance.

Further, the dust collecting unit 12 is formed as a separate space by forming the dust collecting chambers 31 and 32 around the swirling chamber 20. Thereby, the shape of the swirling chamber 20 does not affect the shape of the dust collecting chambers 31 and 32, and therefore, the shapes of the dust collecting chambers 31 and 32 are independent of the cyclone separating performance of the dust in the swirling chamber 20 from the airflow. Therefore, the dust collecting portion casing 12d of various shapes can be used. Thereby, the dust collecting portion casing 12d can be easily miniaturized, and the size of the cleaner can be reduced, and the degree of freedom in design can be improved.

Further, as described above, the shape of the dust collecting portion casing 12d can be determined without deteriorating the cyclone performance. Therefore, as in the present embodiment, the shape of the dust collecting portion casing 12d is a slightly elliptical cylinder, whereby When mounted on the vacuum cleaner body, the overall height can be suppressed. For example, as shown in Fig. 18, in the case where the dust collecting portion casing is cylindrical (single-dotted line), the present invention can suppress the height (the portion of ΔT) while maintaining the dust collecting capacity.

In addition, since the zero-order opening portion 28 is opened in the short-axis YY' direction, the garbage α discharged from the zero-order opening portion 28 to the zero-order dust collecting chamber 31 is directed from the zero-order opening portion 28 due to the influence of the swirling airflow. The cylindrical portion 20a is discharged in the tangential direction. In other words, the garbage α is discharged from the 0th opening portion 28 toward the long axis XX' of the ellipse of the cross section of the dust collecting portion casing 12d, and therefore flows into the slit as the cylindrical portion 20a and the dust collecting portion casing. A wider portion of the 0-times dust collecting chamber 31 has a wider space. In this way, the direction in which the dust is discharged from the zero-order opening portion 28 is a wide space toward the inside of the zero-order dust collecting chamber 31. Therefore, dust does not easily accumulate in the vicinity of the zero-order opening portion 28.

Further, when the dust collecting unit 12 is attached to the main body 6, the zero-order opening portion 28 faces upward, and therefore, the zero-order opening portion 28 is less likely to be caught by the dust remaining inside the dust collecting unit 12.

In addition, by arranging the dust collecting unit 12 in an elliptical cylinder shape, the air flowing into the dust collecting chamber 31 from the zero-order opening portion 28 can flow smoothly, and noise and the like can be prevented.

12‧‧‧Dust collection unit

12a‧‧‧Export housing

12b‧‧‧Filter housing

12c‧‧‧Inflow housing

12d‧‧‧dust collection housing

28‧‧0 times opening

30‧‧‧ next door

Claims (4)

An electric vacuum cleaner comprising: a dust collecting unit; and a cleaner body detachably attaching and detaching the dust collecting unit, wherein the dust collecting unit has an inflow portion housing and a dust collecting portion housing; and the inflow portion housing is formed a later-described component: a swirling chamber that swirls into the dusty air inside and separates the dust from the dust-containing gas stream; and an opening that discharges the separated dust from the swirling chamber; the inflow portion housing is located in the dust collecting chamber The inside of the casing; a dust collecting chamber that retains dust discharged from the swirling chamber is formed in a space formed between the dust collecting portion casing and the outer surface of the inflow portion casing. The electric vacuum cleaner according to claim 1, wherein the dust collecting portion casing is formed in an elliptical cylinder shape. The electric vacuum cleaner according to claim 2, wherein the opening is open toward a short axis direction of an ellipse of a cross-sectional shape of the dust collecting portion casing. The electric vacuum cleaner according to any one of claims 1 to 3, wherein the opening is opened upward in a state in which the dust collecting unit is attached to the cleaner body.