JP2013094334A - Cyclone separator and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone separator which can restraining an air flow sound caused in a swirl chamber from leaking externally and improve a silencing property.SOLUTION: A dust collection unit 20 includes a swirl chamber 22, a preliminary opening 23, a preliminary dust collection chamber 25, and a discharge pipe 33. The swirl chamber 22 swirls dust-containing air flowing in from an inflow opening 21, along a sidewall and separates the dust from the dust-containing air. The preliminary opening 23 is formed in the sidewall of the swirl chamber 22. The discharge pipe 33 is formed with a discharge opening 27 to discharge air in the swirl chamber 22. The preliminary dust collection chamber 25 leads to the swirl chamber 22 through the preliminary opening 23, and collects the dust separated in the swirl chamber 22. The preliminary dust collection chamber 25 is arranged in a manner to cover at least part of the swirl chamber 22 along the sidewall.

Description

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

  The cyclone separator takes in air containing dust (dust) (hereinafter also referred to as “dusty air”) from the inlet to the swirl chamber. Then, by swirling the dust-containing air in the swirl chamber, the dust-containing air is separated into dust and clean air by centrifugal force. Garbage separated from the air in the swirl chamber is captured in the dust collection chamber. Air (clean air) from which dust has been removed in the swirl chamber is sent from the discharge port to the discharge pipe, and is discharged out of the cyclone separation device.

  Patent Document 1 listed below discloses a cyclone separation device including two swirl chambers.

Japanese translation of PCT publication No. 2002-503541

  In the cyclone separator, dust-containing air is swirled in the swirl chamber, so that airflow noise is generated in the swirl chamber. In the cyclone separation device described in Patent Document 1, the airflow sound in the swirl chamber leaks to the outside as it is. Therefore, when this cyclone separation device is mounted on a vacuum cleaner, there is a problem that the quietness of the vacuum cleaner deteriorates. It was.

  This invention was made in order to solve the above-mentioned subject, The objective can suppress that the airflow sound generated in a swirl chamber leaks outside, and the cyclone separation device which can improve silence And a vacuum cleaner equipped with such a cyclone separator.

  A cyclone separation device according to the present invention, a swirling chamber that swirls dust-containing air flowing in from an inlet along a side wall and separates dust from the dust-containing air, a first opening formed in the side wall of the swirling chamber, A first dust collection chamber that communicates with the swirl chamber through the first opening and collects the dust separated in the swirl chamber; and a discharge pipe in which a discharge port for discharging the air in the swirl chamber is formed. The first dust collection chamber covers at least a part of the swirl chamber along the side wall.

  The vacuum cleaner according to the present invention includes the cyclone separation device and a blower that generates a predetermined air flow in the cyclone separation device.

  According to the present invention, in a vacuum cleaner equipped with a cyclone separator and a cyclone separator, airflow sound generated in the swirl chamber can be suppressed from leaking to the outside, and silence can be improved.

It is a perspective view which shows the external appearance of the vacuum cleaner in Embodiment 1 of this invention. It is a perspective view which shows the external appearance of the vacuum cleaner main body of the electric vacuum cleaner in Embodiment 1 of this invention. It is a top view which shows the cleaner body of the vacuum cleaner in Embodiment 1 of this invention. It is a figure which shows the AA cross section of the cleaner body shown in FIG. It is a perspective view which shows the external appearance of the cleaner main body of a state which removed the dust collection unit. It is a top view which shows the vacuum cleaner main body of the state which removed the dust collection unit. It is a perspective view which shows the external appearance of the dust collection unit of the vacuum cleaner in Embodiment 1 of this invention. It is a top view which shows the dust collection unit of the vacuum cleaner in Embodiment 1 of this invention. It is a side view which shows the dust collection unit of the vacuum cleaner in Embodiment 1 of this invention. It is a figure which shows the BB cross section of the dust collection unit shown in FIG. It is a figure which shows CC cross section of the dust collection unit shown in FIG. It is a figure which shows DD cross section of the dust collection unit shown in FIG. It is a figure which shows the EE cross section of the dust collection unit shown in FIG. It is a figure which shows the FF cross section of the dust collection unit shown in FIG. It is sectional drawing which shows the dust collection unit of the vacuum cleaner in Embodiment 2 of this invention. It is sectional drawing which shows the dust collection unit of the vacuum cleaner in Embodiment 2 of this invention. It is a figure which shows the GG cross section of the dust collection unit shown in FIG. It is sectional drawing which shows the other structure of the dust collection unit of the vacuum cleaner in Embodiment 2 of this invention. It is sectional drawing which shows the other structure of the dust collection unit of the vacuum cleaner in Embodiment 2 of this invention. It is sectional drawing which shows the dust collection unit of the vacuum cleaner in Embodiment 3 of this invention.

  The present invention will be described in detail with reference to the accompanying drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. The overlapping description is simplified or omitted as appropriate.

Embodiment 1 FIG.
1 is a perspective view showing an external appearance of a vacuum cleaner according to Embodiment 1 of the present invention.
As shown in FIG. 1, the main part of the vacuum cleaner 1 includes a suction port body 2, a suction pipe 3, a handle 4, a connection pipe 5, a suction hose 6, and a cleaner body 7.

The suction port body 2 is for sucking dust (dust) on the floor surface together with air from an opening formed downward.
The suction pipe 3 is made of a straight member having a cylindrical shape. An intake side end portion of the suction pipe 3 is connected to an exhaust side connection portion of the suction port body 2.

The handle 4 is used by a person who performs cleaning. The handle 4 is provided at the exhaust side end of the suction pipe 3. The handle 4 is provided with an operation switch for controlling (operating) the operation of the electric vacuum cleaner 1.
The connection pipe 5 is made of a cylindrical member that is bent halfway. One end of the connection pipe 5 is connected to the handle 4. The connection pipe 5 is disposed obliquely with respect to the suction pipe 3.

The suction hose 6 is made of a member having a bellows shape with flexibility. One end of the suction hose 6 is connected to the other end of the connection pipe 5.
The vacuum cleaner body 7 separates the dust from the air containing dust (dust-containing air), and returns (discharges) the clean air into the room. The other end of the suction hose 6 is connected to the cleaner body 7. The cleaner body 7 is provided with an electric blower 13 (not shown in FIG. 1) and a power cord 8. By connecting the power cord 8 to an external power source, the internal devices such as the electric blower 13 are energized. The electric blower 13 is driven by energization and performs a predetermined suction operation.

  The suction port body 2, the suction pipe 3, the connection pipe 5 (and a part of the handle 4), and the suction hose 6 are continuously formed inside. When the electric blower 13 performs a suction operation, dust (dust) on the floor surface is sucked into the suction port body 2 together with air, and each of the suction port body 2, the suction pipe 3, the connection pipe 5, and the suction hose 6 is provided inside. And sent to the cleaner body 7. Thus, the suction inlet body 2, the suction pipe 3, the connection pipe 5, and the suction hose 6 form an air passage for allowing dust-containing air to flow into the cleaner body 7 from the outside.

  FIG. 2 is a perspective view showing the appearance of the vacuum cleaner body of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 3 is a plan view showing a vacuum cleaner body of the electric vacuum cleaner according to Embodiment 1 of the present invention. 4 is a cross-sectional view taken along the line AA of the cleaner body shown in FIG.

The cleaner body 7 includes a housing unit 10 and a dust collection unit 20.
Various devices other than the dust collection unit 20 are accommodated in the accommodation unit 10. The accommodation unit 10 is formed with an accommodation portion 10 a formed of a space for accommodating the dust collection unit 20 on the upper surface side. When the dust collection unit 20 is appropriately attached to the storage unit 10, the dust collection unit 20 is disposed in the storage unit 10a. FIG. 5 is a perspective view showing the appearance of the cleaner body with the dust collection unit removed. FIG. 6 is a plan view showing the cleaner body with the dust collection unit removed.

  The housing unit 10 includes an intake air passage forming portion 11, an exhaust air passage forming portion 12, an electric blower 13, a cord reel portion (not shown), and wheels 14.

  The intake air passage forming unit 11 forms an intake air passage 11 a for guiding dust-containing air to the dust collecting unit 20 in the cleaner body 7. One end of the intake air passage forming portion 11 is opened at the front side of the cleaner body 7 and the other end is opened at an inclined surface 10b that forms the accommodating portion 10a. That is, one end of the intake air passage forming portion 11 constitutes a connection port 11 b for connecting the other end portion of the suction hose 6 to the cleaner body 7. The other end of the intake air passage forming unit 11 constitutes a connection port 11 c with the dust collection unit 20.

The dust collection unit 20 is for separating dust from dust-containing air and temporarily storing the separated dust. The dust collection unit 20 separates the dust from the air by centrifugal force by rotating the dust-containing air inside. In the dust collection unit 20, an inflow port 21, a swirl chamber 22, a zero-order opening 23, a primary opening 24, a zero-order dust collection chamber 25, a primary dust collection chamber 26, and a discharge port 27 are formed.
The specific configuration and function of the dust collection unit 20 will be described later.

  The exhaust air passage forming unit 12 is for guiding the air discharged from the dust collection unit 20 (clean air from which dust is removed in the dust collection unit 20) in the cleaner body 7 to an exhaust port (not shown). An exhaust air passage 12a is formed. One end of the exhaust air passage forming unit 12 opens at the inclined surface 10 b and the other end opens toward the outside of the cleaner body 7. That is, one end of the exhaust air passage forming unit 12 constitutes a connection port 12 b with the dust collection unit 20. The other end of the exhaust air passage forming unit 12 constitutes the exhaust port.

  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 cleaner body 7, an intake air passage 11a, an air passage in the dust collecting unit 20, and an exhaust air) This is for generating an air flow in the path 12a). The electric blower 13 is disposed in the exhaust air passage 12 a at the rear part of the cleaner body 7.

  When the electric blower 13 is energized through the power cord 8, the electric blower 13 starts a suction operation, and airflow is generated in each air passage formed in the vacuum cleaner 1. The dust-containing air sucked into the suction port body 2 is taken into the cleaner body 7 from the connection port 11b. The dust-containing air flowing into the cleaner body 7 is sent to the dust collecting unit 20 from the connection port 11c through the intake air passage 11a. The dust-containing air passes through the inlet 21, the swirl chamber 22, and the outlet 27 in the dust collection unit 20 in this order, and is discharged from the dust collection unit 20. The air (clean air) discharged from the dust collection unit 20 flows into the exhaust air passage 12a, passes through the electric blower 13 in the exhaust air passage 12a, and the vacuum cleaner body 7 (the electric vacuum cleaner 1) from the exhaust port. Is discharged outside.

Next, the detailed structure of the dust collection unit 20 will be described with reference to FIGS.
FIG. 7 is a perspective view showing the appearance of the dust collection unit of the electric vacuum cleaner according to Embodiment 1 of the present invention. 8 is a plan view showing a dust collection unit of the electric vacuum cleaner according to Embodiment 1 of the present invention, and FIG. 9 is a side view thereof. 10 is a diagram showing a BB section of the dust collection unit shown in FIG. 8, and FIG. 11 is a diagram showing a CC section. 12 is a diagram showing a DD section of the dust collection unit shown in FIG. 10, FIG. 13 is a diagram showing an EE section, and FIG. 14 is a diagram showing an FF section.

The dust collection unit 20 includes an inner cylindrical portion 28, a conical portion 29, an inflow pipe 30, an outer cylindrical portion 31, a dust collection case 32, and a discharge pipe 33.
In the following description of the dust collection unit 20, the upper and lower sides are specified on the basis of the orientations shown in FIGS.

  The inner cylindrical portion 28 has a cylindrical shape in which one side (upper side) is closed by the upper wall, and the central axis thereof is arranged in the vertical direction. The conical portion 29 is arranged so that the central axis coincides with the central axis of the inner cylindrical portion 28. The conical portion 29 is provided so that the upper end portion is connected to the lower end portion of the inner cylindrical portion 28 and extends downward from the lower end portion of the inner cylindrical portion 28 so that the diameter decreases as it goes downward. The conical portion 29 is hollow, and its lower end portion opens downward (facing the central axis direction). The opening formed at the lower end of the conical portion 29 is the primary opening 24.

  The inflow pipe 30 is for guiding the dust-containing air from the intake air passage 11 a to the inside of the inner cylindrical portion 28. The inflow pipe 30 is connected to the upper part of the inner cylindrical portion 28. One end of the inflow pipe 30 opens toward the outside, and the other end opens inside the inner cylindrical portion 28. That is, one end of the inflow pipe 30 constitutes a connection port 30a connected to the connection port 11c. The other end of the inflow pipe 30 constitutes an inflow port 21. The inflow port 21 is an opening for taking the dust-containing air that has passed through the intake air passage 11 a into the swirl chamber 22. The inlet 21 is formed at the upper part of the inner cylindrical portion 28.

  The swirl chamber 22 is a space for swirling the dust-containing air taken inside through the inflow port 21. The swirl chamber 22 is configured by an inner space of the inner cylindrical portion 28 and an inner space of the conical portion 29. The inflow pipe 30 is obliquely connected to the inner cylindrical portion 28 so that the dust-containing air flows into the inner cylindrical portion 28 from the tangential direction (see, for example, FIG. 12).

  The outer cylindrical portion 31 has a cylindrical shape in which one (upper) is closed by the upper wall, and is disposed so as to surround the lower side of the inner cylindrical portion 28. The outer cylindrical portion 31 has a central axis that coincides with the central axis of the inner cylindrical portion 28. The outer cylindrical portion 31 extends to a position where the upper end portion is slightly below the inflow pipe 30, and the lower end portion extends to a position below the lower end portion of the inner cylindrical portion 28. An annular opening is formed between the lower end portion of the outer cylindrical portion 31 and the conical portion 29.

  The dust collection case 32 consists of one molded product, for example. The dust collection case 32 has a circular bottom plate 32a, a cylindrical outer wall 32b, and a partition wall 32c. The outer wall 32b is provided so as to stand upright from the edge of the bottom plate 32a. That is, the outer wall 32b and the bottom plate 32a form a cylindrical member with one (lower) closed. The partition wall 32c has a cylindrical shape that is slightly smaller than the outer wall 32b. The partition wall 32c is disposed inside the outer wall 32b and is provided to stand upright from the upper surface of the bottom plate 32a.

  In the dust collection case 32, two spaces defined by the partition walls 32c are formed. When the dust collecting case 32 is arranged so that the conical portion 29 is inserted into the space inside the partition wall 32c from above, the upper end portion of the partition wall 32c is provided on the outer peripheral surface (or the outer peripheral surface) of the conical portion 29. The member) from below. Of the space formed inside the partition wall 32 c, the portion excluding the conical portion 29 constitutes the primary dust collection chamber 26. That is, the primary dust collection chamber 26 communicates with the swirl chamber 22 through the primary opening 24. Garbage separated from the dust-containing air in the swirl chamber 22 passes through the primary opening 24 and falls into the primary dust collection chamber 26 and is collected. Note that the opening that leads to the primary dust collection chamber 26 is only the primary opening 24, and the primary dust collection chamber 26 does not directly communicate with any space other than the swirl chamber 22.

  The outer wall 32 b has a diameter that matches the diameter of the outer cylindrical portion 31. The outer wall 32b has an upper end surface that contacts the lower end surface of the outer cylindrical portion 31 from below and is formed continuously with the outer cylindrical portion 31 over the entire circumference. A continuous space having a cylindrical shape formed between the outer wall 32b and the partition wall 32c and between the outer cylindrical portion 31 and the inner cylindrical portion 28 (and the conical portion 29) is a zero-order dust collection chamber. 25.

  The zero-order dust collection chamber 25 is disposed so as to surround the lower portion of the inner cylindrical portion 28 and the conical portion 29 (that is, the swirl chamber 22) over the entire circumference thereof. Further, in the lower part of the dust collection unit 20, the primary dust collection chamber 26 is disposed so as to surround the lower part of the conical part 29 (that is, the swirl chamber 22) over the entire circumference thereof, and further, the zero-order dust collection chamber 26 is disposed. The chamber 25 is disposed so as to surround the primary dust collection chamber 26 over the entire circumference thereof.

  The zero-order opening 23 is an opening formed in the lower portion of the inner cylindrical portion 28 (that is, the side wall forming the swirl chamber 22). The swirl chamber 22 communicates with the zero-order dust collection chamber 25 through the zero-order opening 23. The zero-order opening 23 is formed at a position (downstream side) lower than the inlet 21 and at a position (upstream side) higher than the primary opening 24. The zero-order opening 23 communicates with the upper part of the zero-order dust collection chamber 25, and the zero-order dust collection chamber 25 extends downward from the zero-order opening 23. The only opening that leads to the zero-order dust collection chamber 25 is the zero-order opening 23, and the zero-order dust collection chamber 25 does not directly communicate with other spaces (for example, the primary dust collection chamber 26) other than the swirl chamber 22.

  The zero-order opening 23 is formed so that the width on the upstream side is larger than the direction in which the dust-containing air swirls in the swirl chamber 22 (hereinafter referred to as “swirling direction”), and the width decreases toward the downstream side. ing. Further, in the swirl chamber 22, the dust-containing air moves downward while swirling. The zero-order opening 23 is also formed so that the width on the upstream side is large with respect to the central axis direction of the swirl chamber 22, and the width becomes smaller toward the downstream side (that is, downward).

  L <b> 1 shown in FIG. 10 is the distance between the upstream end of the zero-order opening 23 with respect to the central axis direction of the swirl chamber 22 and the central axis of the swirl chamber 22. L <b> 2 is the distance between the downstream end of the zero-order opening 23 with respect to the central axis direction of the swirl chamber 22 and the central axis of the swirl chamber 22. The zero-order opening 23 is formed such that the distance L2 is slightly longer than the distance L1. Alternatively, the zero-order opening 23 is formed so that the distance L2 coincides with the distance L1.

  L3 shown in FIG. 13 is the distance between the upstream end of the zero-order opening 23 and the central axis of the swirl chamber 22 with respect to the swirl direction. L4 is the distance between the downstream end of the zero-order opening 23 in the swirl direction and the central axis of the swirl chamber 22. The zero-order opening 23 is formed such that the distance L4 is slightly longer than the distance L3. Alternatively, the zero-order opening 23 is formed such that the distance L4 matches the distance L3.

  The discharge pipe 33 is for guiding the air in the swirl chamber 22 to the outside of the dust collection unit 20 (that is, the exhaust air passage 12a). The discharge pipe 33 is made of a cylindrical member bent into an L shape. One side of the L-shape of the discharge pipe 33 penetrates the upper wall of the inner cylindrical portion 28. That is, the discharge pipe 33 is arranged so that a part thereof extends downward from the upper wall of the inner cylindrical portion 28 and projects into the internal space of the inner cylindrical portion 28 (that is, inside the swirl chamber 22). The lower end of the part (one side of the L shape) of the discharge pipe 33 is opened downward. An opening formed at the lower end of the discharge pipe 33 is a discharge port 27. The part of the discharge pipe 33 is arranged such that the central axis coincides with the central axis of the inner cylindrical portion 28.

  The lower end of the part of the discharge pipe 33 is disposed above the upper end of the conical portion 29, for example, at the same height as the zero-order opening 23. The zero-order dust collection chamber 25 extends to a position above the zero-order opening 23. For this reason, the discharge port 27 is arranged outside the swirl chamber 22 so that the entire circumference is surrounded by the zero-order dust collection chamber 25.

An outline of the function of the dust collection unit 20 having the above configuration will be described.
The dust-containing air that has passed through the intake air passage 11 a passes through the inflow pipe 30 and is sent from the inlet 21 to the swirl chamber 22. Since the dust-containing air flows into the inner cylindrical portion 28 along the inner wall of the inner cylindrical portion 28 (side wall forming the swirl chamber 22), a swirling air flow is formed along the side wall in the swirl chamber 22. This whirling airflow flows downward due to its path structure and gravity while forming a forced vortex region near the central axis and a quasi-free vortex region outside the central vortex region.

  Centrifugal force acts on the dust contained in the swirling airflow (dust-containing air). For example, relatively bulky waste such as fiber waste or hair (hereinafter such waste is referred to as “garbage α”) is pressed against the inner wall of the inner cylindrical portion 28 by this centrifugal force, To fall. When the waste α reaches the height of the 0th-order opening 23, it is separated from the swirling airflow, passes through the 0th-order opening 23, and is sent to the 0th-order dust collection chamber 25. The dust α that has entered the zero-order dust collection chamber 25 from the zero-order opening 23 descends and is trapped inside the zero-order dust collection chamber 25 by its own weight.

  Garbage that has not entered the zero-order dust collection chamber 25 from the zero-order opening 23 rides on the airflow in the swirl chamber 22 and travels below the swirl chamber 22. Garbage with a relatively small volume such as sand litter and fine fiber litter (hereinafter such litter is referred to as “garbage β”) falls into the primary dust collection chamber 26 via the primary opening 24 and is captured. When the airflow swirling in the swirl chamber 22 reaches the lowermost part of the swirl chamber 22, its traveling direction is changed upward, and it rises along the central axis of the swirl chamber 22. Garbage α and dust β are removed from the air forming the updraft. The airflow (clean air) from which the waste α and the waste β are removed is discharged out of the swirl chamber 22 through the discharge port 27. The air discharged from the swirl chamber 22 passes through the discharge pipe 33 and is sent to the exhaust air passage 12a.

  If the dust collection case 32 is configured to be detachable from other members of the dust collection unit 20, all the collected garbage (garbage α, garbage β) can be removed by removing one case part when throwing away the garbage. Can be disposed of at a time, and the work of disposing of waste can be facilitated.

  If it is the dust collection unit 20 of the said structure, it can suppress that the airflow sound which generate | occur | produces in the rotation chamber 22 leaks outside, and it can improve silence.

  In the dust collection unit 20, the swirl chamber 22 is covered with a zero-order dust collection chamber 25 in the circumferential direction. Particularly, the conical portion 29 where the high-speed swirling airflow is generated is covered with the zero-order dust collecting chamber 25 over the entire circumference. For this reason, airflow sound generated in the swirl chamber 22 can be greatly attenuated in the zero-order dust collection chamber 25, and noise reduction of the dust collection unit 20 and the vacuum cleaner 1 equipped with the dust collection unit 20 can be achieved. Can do.

  Further, in the dust collection unit 20 having the above configuration, the air flow hardly flows into the zero-order dust collection chamber 25. For example, in the present embodiment, only one zero-order opening 23 is formed in the zero-order dust collection chamber 25, and no opening serving as an airflow outlet is formed in the zero-order dust collection chamber 25. For this reason, airflow noise is not generated in the zero-order dust collection chamber 25, and the noise can be further reduced as the entire dust collection unit 20.

The 0th-order opening 23 is formed so that the distance L2 is longer than the distance L1, or the distance L2 matches the distance L1. For this reason, it is possible to further suppress the swirling airflow from flowing into the zero-order dust collection chamber 25. Since the waste α falls in the swirl chamber 22 while being pressed against the inner wall of the inner cylindrical portion 28 by centrifugal force, the collection performance of the waste α is lowered even if the zero-order opening 23 has the above-described configuration. There is no.
Even if the zero-order opening 23 is formed such that the distance L4 is longer than the distance L3 or the distance L4 is equal to the distance L3, the same effect as described above can be obtained, and the dust collecting unit 20 and the vacuum cleaner 1 can be reduced in noise.

  In the dust collection unit 20, turbulent flow is generated when the swirling airflow changes its traveling direction upward in the lowermost part of the swirling chamber 22, and when the ascending airflow flows into the discharge pipe 33 from the discharge port 27, and a large airflow sound is generated. Easy to do.

In the dust collection unit 20, the lowermost part of the swirl chamber 22, that is, the vicinity of the primary opening 24 is double covered with the primary dust collection chamber 26 and the zero-order dust collection chamber 25. For this reason, it is possible to effectively insulate the noise generated in the lowermost part of the swirl chamber 22.
In the dust collection unit 20, the outer cylindrical portion 31 is extended to a position above the discharge port 27, and the vicinity of the discharge port 27 is covered with the zero-order dust collection chamber 25. For this reason, the noise generated in the vicinity of the discharge port 27 can be effectively insulated.

  Since the zero-order dust collection chamber 25 formed outside the swirl chamber 22 has a cylindrical shape, no standing sound wave is formed. For this reason, it is possible to prevent the sound from resonating in the zero-order dust collection chamber 25.

  In the present embodiment, the case where two dust collection chambers (the zero-order dust collection chamber 25 and the primary dust collection chamber 26) are formed in the dust collection unit 20 has been described. However, it goes without saying that the effect of insulating the noise from the swirl chamber 22 by the zero-order dust collection chamber 25 that suppresses the inflow of airflow is also effective in a configuration that does not include the primary dust collection chamber 26.

Embodiment 2. FIG.
15 and 16 are cross-sectional views showing the dust collection unit of the electric vacuum cleaner according to Embodiment 2 of the present invention. FIG. 17 is a view showing a GG section of the dust collection unit shown in FIG. FIG. 15 shows an EE cross section in the present embodiment. FIG. 16 shows an FF cross section in the present embodiment.
The dust collection unit 20 in the present embodiment is different from that in the first embodiment in that the capturing body 34 is provided in the zero-order dust collection chamber 25. Other configurations are the same as those in the first embodiment.

  A relatively bulky garbage α enters the zero-order dust collection chamber 25 from the swirl chamber 22. Since the dust α rotates while receiving centrifugal force in the swirl chamber 22, even after entering the zero-order dust collection chamber 25, the outer cylindrical portion 31 (and the outer wall 32 b of the dust collection case 32 are affected by the centrifugal force. ) And continues to swivel in the zero-order dust collection chamber 25. When the dust α turns in the zero-order dust collecting chamber 25, the dust α comes into contact with the outer cylindrical portion 31 and the outer wall 32b of the dust collecting case 32, and new noise is generated.

  The capturing body 34 is for preventing the dust α from turning inside the zero-order dust collection chamber 25. The capturing body 34 is provided across the top and bottom of the zero-order dust collection chamber 25 so that the zero-order dust collection chamber 25 is not continuous in the swivel direction.

  Specifically, the capturing body 34 includes a plate-like member provided between the outer cylindrical portion 31 and the inner cylindrical portion 28 (and the conical portion 29), and between the outer wall 32b and the partition wall 32c of the dust collecting case 32. It is comprised by the provided plate-shaped member. The capturing bodies 34 made of the two plate-like members are arranged one above the other so as to partition the zero-order dust collection chamber 25. Further, as shown in FIGS. 15 and 16, the capturing body 34 is disposed so as to be inclined with respect to a straight line orthogonal to the central axis of the inner cylindrical portion 28.

In the dust collection unit 20 having the above-described configuration, the dust α that has entered the zero-order dust collection chamber 25 from the swirl chamber 22 is captured by the capturing body 34 and its movement is stopped. Therefore, the dust α does not contact the outer cylindrical portion 31 or the outer wall 32b of the dust collecting case 32 to generate noise. Further noise reduction of the dust collection unit 20 and the vacuum cleaner 1 is possible.
The dust α that has entered the zero-order dust collection chamber 25 is accumulated while being compressed with the capturing body 34 as a base point. For this reason, it is possible to collect the waste α by effectively utilizing the space, and it is possible to reduce the waste disposal frequency. Further, the dust collection unit 20 can be downsized.

  It is preferable that the distance from when the garbage α enters the zero-order dust collection chamber 25 through the zero-order opening 23 to be captured by the capturing body 34 is made as long as possible. Garbage α that has jumped out of the 0th-order opening 23 into the 0th-order dust collection chamber 25 also moves in the swiveling direction (arrow X in FIG. 15) in the 0th-order dust collection chamber 25 due to the influence of centrifugal force. If the capturing body 34 is arranged on the most downstream side in the swiveling direction with respect to the zero-order opening 23, the dust α can be accumulated from the back side of the zero-order dust collecting chamber 25, and more dust is captured. Can be collected.

  The capturing body 34 may have another configuration as long as it has a function of preventing the dust α from turning in the zero-order dust collection chamber 25. 18 and 19 are sectional views showing other configurations of the dust collection unit of the electric vacuum cleaner according to Embodiment 2 of the present invention, and show other embodiments of the capturing body.

  The dust collecting unit 20 shown in FIG. 18 is provided with a capturing body 34 a that is shorter than the capturing body 34. The capturing body 34 a is formed of a rectangular plate-like member provided only in the dust collection case 32. The capturing body 34a protrudes from the bottom plate 32a to a predetermined height, and is provided across the outer wall 32b and the partition wall 32c of the dust collecting case 32.

  The dust collecting unit 20 shown in FIG. 19 is provided with a capturing body 34b that is narrower than the capturing body 34a. The capturing body 34b is formed of a triangular plate-like member (or rib) provided only in the dust collection case 32. The capturing body 34b protrudes from the bottom plate 32a to a predetermined height. A gap is formed between the capturing body 34b and the outer wall 32b and the partition wall 32c.

Embodiment 3 FIG.
In the first and second embodiments, the case where the zero-order dust collection chamber 25 is formed so as to surround the swirl chamber 22 in the circumferential direction has been described. However, even if the zero-order dust collection chamber 25 is configured to cover a part (not the entire circumference) of the swirl chamber 22, a certain sound insulation property can be expected. In the present embodiment, a case will be described in which the zero-order dust collection chamber 25 is disposed along the side wall forming the swirl chamber 22 and only a part of the swirl chamber 22 is covered by the zero-order dust collection chamber 25.

FIG. 20 is a sectional view showing a dust collection unit of the electric vacuum cleaner according to Embodiment 3 of the present invention. FIG. 20 shows an EE cross section in the present embodiment.
The dust collection unit 20 in the present embodiment is different from that of the first embodiment in that the outer cylindrical portion 31a is arranged away from the inner cylindrical portion 28. Other configurations are the same as those in the first embodiment.

  The outer cylindrical portion 31a is arranged so that the central axis is parallel to the central axis of the inner cylindrical portion 28 (and the conical portion 29) at a position separated by a predetermined distance. The inner cylindrical portion 28 has a portion protruding (exposed) from the outer cylindrical portion 31a in the vertical direction. That is, the outer cylindrical portion 31a is provided not to cover the inner cylindrical portion 28 over the entire circumference but to cover a part of the inner cylindrical portion 28 in the circumferential direction.

  In the dust collection unit 20 having the above configuration, a crescent-shaped zero-order dust collection chamber 25a is formed on the outside of the swirl chamber 22 along the side wall forming the swirl chamber 22 in plan view (as viewed from the axial direction). The Even in such a configuration, it is possible to improve the quietness by suppressing the airflow sound generated in the swirl chamber 22 from leaking to the outside.

  Further, one end of the crescent shape (the end portion on the downstream side in the turning direction) has a function of the capturing body 34. For this reason, if the 0th-order opening 23 is formed on the crescent-shaped other end (upstream end in the turning direction), the distance from when the garbage α enters the 0th-order dust collection chamber 25a to be captured. Can be lengthened. That is, it is possible to reduce the frequency of waste disposal and to reduce the size of the dust collection unit 20.

  In the first to third embodiments, the canister type vacuum cleaner has been described. Needless to say, the present invention can be applied to other types of vacuum cleaners.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner, 2 Air inlet, 3 Suction pipe, 4 Handle, 5 Connection pipe, 6 Suction hose, 7 Vacuum cleaner main body, 8 Power supply cord 10 Storage unit, 10a Storage part, 10b Slope, 11 Intake air path formation part 11a intake air passage, 11b connection port, 11c connection port, 12 exhaust air passage formation part, 12a exhaust air passage, 12b connection port, 13 electric blower, 14 wheels 20 dust collecting unit, 21 inflow port, 22 swirl chamber, 23 0 primary opening, 24 primary opening, 25 0 primary dust collection chamber, 25a 0 primary dust collection chamber, 26 primary dust collection chamber, 27 discharge port, 28 inner cylindrical portion, 29 conical portion, 30 inlet pipe, 30a connection port, 31 Outer cylindrical part, 31a Outer cylindrical part, 32 Dust collection case, 32a Bottom plate, 32b Outer wall, 32c Bulkhead, 33 Discharge pipe, 34 Capture body, 34a Capture body, 34b Capture Trap

A cyclone separation device according to the present invention, a swirling chamber that swirls dust-containing air flowing in from an inlet along a side wall and separates dust from the dust-containing air, a zero-order opening formed in the side wall of the swirling chamber, through the swirl chamber through the zero-order aperture, the zero-order dust collection chamber separated dust is collected in the whirling chamber, and a discharge pipe outlet is formed for discharging the air in the whirling chamber provided, zero-order dust collection chamber is at least a portion of the swirling chamber has covered along the side wall, zero-order aperture, the distance between the central axis of the swirl chamber downstream end with respect to the turning direction of the whirling chamber, Longer than the distance between the upstream end with respect to the swirl direction and the central axis of the swirl chamber, the zero-order opening is the distance between the downstream end with respect to the swirl chamber axial direction and the central axis of the swirl chamber. It is longer than the distance between the upstream end and the central axis of the swirl chamber .

The vacuum cleaner according to the present invention includes the cyclone separation device and a blower that generates a predetermined air flow in the cyclone separation device.
Further, the cyclone separation device according to the present invention swirls the dust-containing air flowing in from the inlet along the side wall, and separates the dust from the dust-containing air, and the zero-order opening formed in the side wall of the swirl chamber. And a zero-order dust collection chamber that communicates with the swirl chamber through the zero-order opening and collects the dust separated in the swirl chamber, and a discharge pipe in which a discharge port for discharging the air in the swirl chamber is formed The zero-order dust collection chamber covers at least a part of the swirl chamber along the side wall, and the zero-order opening has a distance between the downstream end with respect to the axial direction of the swirl chamber and the central axis of the swirl chamber. The distance between the upstream end with respect to the axial direction and the central axis of the swirl chamber is longer.
Further, the cyclone separation device according to the present invention swirls the dust-containing air flowing in from the inlet along the side wall, and separates the dust from the dust-containing air, and the zero-order opening formed in the side wall of the swirl chamber. And a zero-order dust collection chamber that communicates with the swirl chamber through the zero-order opening and collects the dust separated in the swirl chamber, and a discharge pipe in which a discharge port for discharging the air in the swirl chamber is formed The side wall of the swirl chamber has a cylindrical shape on the inlet side, the zero-order opening communicates with the upper portion of the zero-order dust collection chamber, and the downstream end with respect to the swirl direction of the swirl chamber and the central axis of the swirl chamber Is longer than the distance between the upstream end of the swirl direction and the central axis of the swirl chamber, and the zero-order dust collection chamber covers at least a part of the swirl chamber along the side wall.
Further, the cyclone separation device according to the present invention swirls the dust-containing air flowing in from the inlet along the side wall, and separates the dust from the dust-containing air, and the zero-order opening formed in the side wall of the swirl chamber. And a zero-order dust collection chamber that communicates with the swirl chamber through the zero-order opening and collects the dust separated in the swirl chamber, and a discharge pipe in which a discharge port for discharging the air in the swirl chamber is formed The side wall of the swirl chamber has a cylindrical shape on the inlet side, the zero-order opening communicates with the upper portion of the zero-order dust collection chamber, and the downstream end with respect to the swirl direction of the swirl chamber and the central axis of the swirl chamber The zero-order dust collection chamber covers at least a part of the swirl chamber along the side wall.

Claims (12)

A swirl chamber that swirls the dust-containing air flowing in from the inlet along the side wall, and separates dust from the dust-containing air;
A first opening formed in the side wall of the swirl chamber;
A first dust collection chamber that communicates with the swirl chamber through the first opening and that collects garbage separated in the swirl chamber;
A discharge pipe formed with a discharge port for discharging the air in the swirl chamber;
With
The first dust collection chamber is a cyclone separator that covers at least a part of the swirl chamber along the side wall.   The first opening is such that the distance between the downstream end with respect to the swirl direction of the swirl chamber and the central axis of the swirl chamber is greater than the distance between the upstream end with respect to the swirl direction and the central axis of the swirl chamber. The cyclone separator according to claim 1, which is longer.   In the first opening, the distance between the downstream end of the swirl chamber and the central axis of the swirl chamber is the distance between the upstream end of the swirl direction and the central axis of the swirl chamber. The cyclone separator according to claim 1 that coincides.   The first opening is such that the distance between the downstream end with respect to the axial direction of the swirl chamber and the central axis of the swirl chamber is greater than the distance between the upstream end with respect to the axial direction and the central axis of the swirl chamber. The cyclone separator according to any one of claims 1 to 3, which is longer.   In the first opening, the distance between the downstream end with respect to the axial direction of the swirl chamber and the central axis of the swirl chamber is the distance between the upstream end with respect to the axial direction and the central axis of the swirl chamber. The cyclone separator according to any one of claims 1 to 3, which matches.   The cyclone separator according to any one of claims 1 to 5, wherein the first dust collection chamber is disposed outside the swirl chamber so as to cover at least a part of the discharge port along the side wall. . A second dust collection chamber that communicates with the swirl chamber through a second opening and that collects garbage separated in the swirl chamber;
With
The second opening is formed downstream of the first opening,
The second dust collection chamber covers at least a part of the swirl chamber along the side wall,
The cyclone separator according to any one of claims 1 to 6, wherein the first dust collecting chamber covers at least a part of the second dust collecting chamber along the side wall.   The cyclone separator according to claim 7, wherein the second dust collection chamber does not directly communicate with the first dust collection chamber.   The cyclone separator according to any one of claims 1 to 8, wherein the first dust collecting chamber is formed in a cylindrical shape and is disposed so as to surround the swirl chamber over the entire circumference thereof.   The cyclone according to any one of claims 1 to 8, wherein the first dust collection chamber is formed in a crescent shape along the side wall when viewed from the axial direction of the swirl chamber, outside the swirl chamber. Separation device. Only one first opening is formed,
The cyclone separator according to any one of claims 1 to 10, wherein the first dust collection chamber communicates with the swirl chamber only through the first opening. A cyclone separator according to any one of claims 1 to 11,
A blower for generating a predetermined air flow in the cyclone separator;
Vacuum cleaner with

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