JP2013085589A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner in which the dust collection performance improves, and burden of maintenance can be reduced.SOLUTION: The vacuum cleaner includes: a nearly cylindrical primary swirl chamber 34 in which dust-contained air is swirled to separate dust from air; a secondary swirl chamber 39 in communication with the primary swirl chamber 34; a dust collection chamber 35 which is situated in the lower part of the primary swirl chamber 34 to collects dust; and an inlet 40 in which dust flows in. The vacuum cleaner is configured to have a projected body 41 which is raised from the bottom of the dust collection chamber 35 to near the lower end of the inlet 40. Consequently, the dust entered the dust collection chamber 35 moves therein by keeping up a slow air flow inside the dust collection chamber 35. However, when the dust approaches the inlet 40, the dust is blocked by the projected body 41 near the inlet 40 and prevented from going out from the inlet 40 to the secondary swirl chamber 39. Thus, dust collection performance is improved, reducing maintenance by preventing an exhaust tube 36 from clogging.

Description

  The present invention relates to a dust collection chamber of a cyclone type electric vacuum cleaner.

  2. Description of the Related Art In recent years, a so-called cyclonic vacuum cleaner, which has a swirling component in sucked air and separates and removes dust from an air stream by centrifugal force, has attracted attention. In this type of vacuum cleaner, as shown in FIG. 8, a cylindrical swirl chamber 1 for swirling dust and air, and an exhaust cylinder 3 fitted with a mesh-like filter 2 provided in the central portion of the swirl chamber 1. And an air inlet 4 formed in a tangential direction of the swirl chamber 1 and an exhaust provided in the central portion of the top surface of the swirl chamber 1 to discharge the dust-removed air from the swirl chamber 1 via the exhaust tube 3. Air formed in the space surrounded by the mouth 5, the U-shaped introduction path 6 communicating with the swirl chamber 1, the cylindrical collection section 7, and the collection section 7, the introduction path 6, and the swirl chamber 1. A return duct 8, a through hole 9 provided in the collecting unit 7 and communicating with the air return duct 8, and an opening 10 provided in the collecting unit 7 and communicating with the swirl chamber 1 are provided.

  The lower surface of the collection unit 7 is a slide floor 11 and is normally closed. The air that enters through the introduction path 6 and enters the collection unit 7 drops dust into the collection unit 7, passes through the through hole 9, enters the air return duct 8, and returns to the swirl chamber 1 from the opening 10. A lower portion of the collecting unit 7 is a cylindrical pipe 12, and is separated from the collecting unit 7 by a slide floor 11. When the collection part 7 becomes full, the container 13 is arranged under the cylindrical pipe 12, and the slide floor 11 is moved to drop dust on the container 13 (see Patent Document 1).

Special table 2003-517908 gazette

  However, in the vacuum cleaner described in Patent Document 1, a small amount of air that has carried dust to the collecting unit 7 passes through the accumulated dust and passes through the air return duct 8 and the opening 10 from the through hole 9. Since the structure returns to the swirl chamber 1, some dust, particularly small dust, rides on the air flow and passes through the through hole 9 and returns to the swirl chamber 1, resulting in poor dust collection performance. Since it adheres to the mesh-like filter 2 of the cylinder 3 and reduces the suction capacity, there has been a problem that the exhaust pipe 3 needs to be frequently maintained.

  This invention solves the said conventional subject, and provides the vacuum cleaner which comprises a dust collection case which can improve dust collection performance and can reduce maintenance of an exhaust pipe.

In order to achieve the above object, an electric vacuum cleaner of the present invention is an electric blower that generates suction force, and an air blower that is installed upstream of the electric blower and that contains dust sucked by the electric blower to rotate and separate the dust. A cylindrical primary swirl chamber;
A secondary swirl chamber having a circular arc shape in a communicating part of the primary swirl chamber;
In a cyclonic electric vacuum cleaner that communicates with the secondary swirl chamber and includes a dust collection chamber that collects dust from the secondary swirl chamber.
In the outer circumferential direction of the primary swirl chamber, there is an intake port for sucking air containing dust, and in the vicinity of the center of the primary swirl chamber, there is a ventilation portion for exhausting dust separated air. And a central portion of the dust collection chamber is arranged so as to be shifted in the horizontal direction from the axial center of the secondary swirl chamber,
A wall that separates the secondary swirl chamber and the dust collection chamber is formed inside a circumference of the secondary swirl chamber, and dust swirling in the secondary swirl chamber is formed in the dust collection chamber on the wall portion. An inflow inlet,
A protruding body that protrudes from the bottom surface of the dust collection chamber to the vicinity of the lower end of the inlet is provided.

  With such an invention, the air swirling in the secondary swirl chamber is collected from a part of the inflow port due to a slight dynamic pressure against the inflow port, a centrifugal force to the air, a pressure difference between the secondary swirl chamber and the dust collection chamber, and the like. Since a small amount flows into the dust chamber, the air decelerates and slowly turns in the dust chamber. The dust flowing into the dust collection chamber does not return to the secondary swirl chamber from the inflow port again by air, but is separated from the air by its own weight and collected in the dust collection chamber.

  At that time, a part of the dust that has entered the dust collection chamber moves in the dust collection chamber while riding on the slow air in the dust collection chamber. However, when dust approaches the inflow port, it does not go out from the inflow port to the secondary swirl chamber because it is blocked by the protrusion in the vicinity of the inflow port.

  After that, the swirling air from which the dust has been separated returns from the center of the secondary swirl chamber to the primary swirl chamber, and is exhausted to the outside from the vent.

  In the vacuum cleaner of the present invention, the dust collecting performance is improved because the dust in the dust collecting chamber does not flow back from the inlet and return to the secondary swirl chamber, and maintenance can be reduced by preventing clogging of the exhaust pipe. .

External view of the electric vacuum cleaner in Embodiment 1 of this invention Side sectional view of the vacuum cleaner during cleaning The perspective sectional view which shows the principal part structure during the cleaning of a vacuum cleaner Plan sectional view of the secondary swirl chamber and dust collection chamber during vacuum cleaner cleaning The perspective sectional view which shows the principal part structure of the dust collection chamber of a vacuum cleaner Side sectional view of the vacuum cleaner dust collection chamber Side sectional view of the vacuum cleaner after cleaning Main part configuration diagram of a conventional vacuum cleaner

The first invention includes an electric blower that generates a suction force, a substantially cylindrical primary swirling chamber that is installed upstream of the electric blower and that swirls air containing dust sucked by the electric blower and separates the dust,
A secondary swirl chamber having a circular arc shape in a communicating part of the primary swirl chamber;
In a cyclonic electric vacuum cleaner that communicates with the secondary swirl chamber and includes a dust collection chamber that collects dust from the secondary swirl chamber.
In the outer circumferential direction of the primary swirl chamber, there is an intake port for sucking air containing dust, and in the vicinity of the center of the primary swirl chamber, there is a ventilation portion for exhausting dust separated air. And a central portion of the dust collecting chamber is arranged to be shifted in a horizontal direction from an axial center of the secondary swirl chamber, so that the secondary swirl chamber is arranged inside the circumference of the secondary swirl chamber. A wall that separates the swirl chamber and the dust collection chamber is formed, and the wall has an inflow port through which dust swirls in the secondary swirl chamber flows into the dust collection chamber, from the bottom surface of the dust collection chamber A projecting body protruding up to the vicinity of the lower end of the inflow port is provided.

  As a result, the air swirling in the secondary swirl chamber is moved from a part of the inflow port to the dust collection chamber due to a slight dynamic pressure on the inflow port, a centrifugal force to the air, a pressure difference between the secondary swirl chamber and the dust collection chamber, and the like. Since a small amount flows in, the air decelerates and turns slowly in the dust collection chamber. The dust flowing into the dust collection chamber does not return to the secondary swirl chamber from the inflow port again by air, but is separated from the air by its own weight and collected in the dust collection chamber.

  At that time, a part of the dust that has entered the dust collection chamber moves in the dust collection chamber while riding on the slow air in the dust collection chamber. However, when dust approaches the inlet, it is blocked by the projecting body in the vicinity of the inlet and does not exit from the inlet to the secondary swirl chamber. After that, the swirling air from which the dust has been separated returns from the center of the secondary swirl chamber to the primary swirl chamber, and is exhausted to the outside from the vent. Therefore, the vacuum cleaner of the present invention improves dust collection performance because dust in the dust collection chamber does not flow backward from the inlet and returns to the secondary swirl chamber, and reduces maintenance by preventing clogging of the exhaust stack. Can do.

  According to a second aspect of the present invention, in particular, in the first aspect of the present invention, the length of the projecting body along the horizontal direction of the inflow port is greater than the length of the inflow port in the horizontal direction.

  As a result, a part of the dust that has entered the dust collection chamber moves in the dust collection chamber on the slow air in the dust collection chamber. However, since there is no outlet there, dust will not go out to the secondary swirl chamber.

  According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the top surface portion of the protrusion is an inclined surface that descends from the inflow port toward the inside of the dust collection chamber.

  As a result, the dust that has passed through the inlet in order to enter the dust collection chamber from the secondary swirl chamber quickly slides down from the protrusion onto the dust collection chamber. For example, even if the air flow is stopped by turning off the power, it does not accumulate on the protruding body, so that dust does not go out to the secondary swirl chamber when the power is turned on next time.

(Embodiment 1)
The vacuum cleaner in Embodiment 1 of this invention is demonstrated using FIGS.
1 is an external view of the whole electric vacuum cleaner showing Embodiment 1 of the present invention, FIG. 2 is a side sectional view of the electric vacuum cleaner during cleaning, and FIG. 3 is an electric vacuum cleaner. FIG. 4 is a plan sectional view showing the positional relationship between the secondary swirl chamber 39 and the dust collecting chamber 35 of the vacuum cleaner, and FIG. FIG. 6 is a side sectional view of the dust collection chamber of the vacuum cleaner, and FIG. 7 is a side view of the vacuum cleaner after the cleaning is completed. A sectional view is shown.

  As shown in FIG. 1, wheels 22 and casters 23 are attached to the outside of the cleaner body 21, and the cleaner body 21 can freely move on the floor surface. An extension pipe 28 having a suction hose 26 and a handle 27 is sequentially connected to the suction port 25 provided below the dust collection case 24 installation portion, and a suction tool 29 is attached to the tip of the extension pipe 28. Yes.

  As shown in FIGS. 1 and 2, the dust collecting case 24 is detachably attached to the cleaner body 21 containing the electric blower 30 and is inclined at an angle of about 45 ° with respect to the horizontal. 21, the suction port 31 on the inlet side of the dust collection case 24 communicates with the suction passage 32 that opens the suction port 25, while the vent 33 on the outlet side of the dust collection case 24 communicates with the electric blower 30. Yes.

As shown in FIGS. 3 and 4, the dust collection case 24 includes a cylindrical primary swirl chamber 34 that takes in air containing dust and generates a swirling airflow, a substantially cylindrical secondary swirl chamber 39 located below the primary swirl chamber 39, And a rectangular parallelepiped dust collecting chamber 35 for collecting dust.

  The primary swirl chamber 34 is provided with an intake port 31 opened so as to be tangential to the inner peripheral surface of the cylindrical outer shape, and a cylindrical exhaust tube 36 communicating with the vent port 33 at the center. Yes. A ventilation portion 37 is formed by a filtration filter such as a mesh filter or an etching filter on the outer peripheral side wall of the exhaust pipe 36 to prevent coarse dust from passing through the exhaust pipe 36. In addition, a non-woven fabric filter folded in a pleat shape is disposed as the second dust separating means 38 between the exhaust tube 36 and the vent 33. The dust collection chamber 35 is disposed below the primary swirl chamber 34 at positions where the respective central axes are shifted in parallel to the horizontal direction so as to communicate with the secondary swirl chamber.

  The dust inflow port 40 to the dust collecting chamber 35 is formed on the upstream side of the swirling airflow of the wall 39 a that separates the secondary swirling chamber 39 and the dust collecting chamber 35, and the arcuate wall portion of the secondary swirling chamber 39. Part of the secondary swirl chamber 39 is extended in the tangential direction of the arc of the secondary swirl chamber 39 to form an introduction side wall 39b, and the opening range of the inflow port 40 is extended to the introduction side wall to constitute an inflow path.

  Further, a protrusion 41 that protrudes from the bottom surface to the vicinity of the inlet 40 is provided in the vicinity of the inlet 40 of the dust collection chamber 35, and as shown in FIGS. 5 and 6, the inlet 40 of the protrusion 41 is horizontal. The length D along the direction is longer than the horizontal length d of the inflow port 40. The top surface portion 41 a of the projecting body 41 is an inclined surface 45 that descends from the inlet 40 toward the inside of the dust collection chamber 35.

  As shown in FIG. 6, the compression means 42 is provided with a flat compression plate 43 that moves up and down in the dust collecting chamber 35, is manually lowered, and is raised by a spring (not shown). The compression plate 43 sets a gap (for example, 1 to 3 mm) between the compression plate 43 and the dust collection chamber 35 that does not rub against the dust collection chamber 35 and on which the dust accumulated during compression does not escape. Further, the compression plate 43 is arranged in a size that does not cover the protruding body 41 portion.

Operation | movement of the vacuum cleaner comprised as mentioned above is demonstrated.
First, as shown in FIG. 1, the dust on the floor surface of the house is sucked from the suction tool 29 by the suction action generated by the electric blower 30, and the dust collecting case 24 passes through the suction hose 26 and the extension pipe 28. Air containing dust is introduced, the dust is centrifuged, and fine dust is filtered and collected. The filtered air is exhausted from an exhaust outlet (not shown) downstream of the electric blower 30 (a cyclonic vacuum cleaner).

  Next, the operation of the dust collecting case 24 will be described with reference to FIGS. First, the spring of the compression means 42 raises the compression plate 43 and stores it in the upper part of the dust collecting chamber 35. And the air containing the dust which flowed in from the air inlet 31 by the suction action of the electric blower 30 is ejected tangentially from the air inlet 31 to the primary swirl chamber 34 and slightly swirls around the exhaust pipe 36 and immediately turns into the primary swirl. It flows into the secondary swirl chamber 39 located below the chamber 34. Thereafter, the air that has flowed into the secondary swirl chamber 39 flows through the substantial center of the secondary swirl chamber 39 and the primary swirl chamber 34 to the ventilation portion 37.

  In particular, as shown in FIG. 4, the primary swirl chamber 34 and the dust collection chamber 35 are in a state of being shifted in parallel, but in the secondary swirl chamber 39, the swirling air reaches the upstream end of the wall 39a. Then, since the direction is suddenly changed along the wall 39a, the dust contained in the air cannot go about the air that changes the direction, and jumps into the dust collecting chamber 35 from the inlet 40 due to the inertial force of the dust itself. Go on.

At that time, the swirling air flows along the outer peripheral side wall of the secondary swirl chamber 39, but the amount is small due to a slight dynamic pressure on the inlet 40, centrifugal force to the air, etc. It flows into the dust collecting chamber 35 from the inflow port 40. In the dust collection chamber 35, the air immediately decelerates and slowly swirls in the dust collection chamber 35, and returns from the inlet 40 to the secondary swirl chamber 39. The dust flowing into the dust collection chamber 35 does not return to the secondary swirl chamber 39 from the inlet 40 due to the slowly swirling air, but is separated from the air by its own weight, and is usually fine dust from the bottom on the bottom of the dust collecting chamber 35. (Soil, sand, etc.) and coarse dust (cotton dust, etc.).

  At this time, as shown in FIG. 5, the dust that has entered the dust collection chamber 35 is accumulated at the bottom of the dust collection chamber 35, and a part of the dust is slowly swirled around the bottom of the dust collection chamber 35 by a slow airflow.

  At that time, dust on the airflow may flow near the inlet 40 of the dust collection chamber 35 from the back side of the dust collection chamber 35. However, since the dust is blocked by the protrusions 41 and cannot approach the inlet 40, the amount of dust that flows backward from the inlet 40 and adheres to the ventilation portion 37 is reduced, so that the maintenance of the exhaust pipe 36 can be reduced.

  Further, since the top surface portion 41a of the projecting body 41 has an inclined surface 45 that descends from the inlet 40 toward the inside of the dust collecting chamber 35, it has passed through the inlet 40 in order to enter the dust collecting chamber 35 from the secondary swirl chamber 39. The dust quickly slides down from the top surface portion 41 a of the projecting body 41 into the dust collecting chamber 35. For example, even if the air flow stops due to the power being turned off, the dust slides down on the slope and accumulates in the dust collecting chamber 35 without accumulating on the top surface portion 41a of the projecting body 41. There is no going out to room 39.

  Further, as shown in FIG. 6, the length D of the projecting body 41 is longer than the length d of the inflow port 40. Therefore, even if dust hits the projecting body 41 and rises directly above the air current Since there is no inlet 40, no dust will go out to the secondary swirl chamber 39.

  Naturally, since the fine dust that passes through the ventilation portion 37 and adheres to the second dust separation means 38 is reduced, the number of maintenance times of the second dust separation means 38 can also be reduced. Thereafter, the swirling air from which the dust has been separated returns from the center of the secondary swirl chamber 39 to the primary swirl chamber 34 and is exhausted from the vent 37 to the outside.

  On the other hand, the dust that has not jumped into the dust collection chamber 35 is blocked by the ventilation portion 37, is again caught in the centrifugal swirl air, eventually jumps into the dust collection chamber 35 from the inlet 40, and accumulates on the bottom surface of the dust collection chamber 35. Further, since the air swirls slowly in the dust collection chamber 35, it is not necessary to enlarge the dust collection chamber 35 and reduce the speed of the air as in the conventional case, and the dust collection chamber 35 can be downsized.

  Further, since the dust collection case 24 is installed at an angle of about 45 ° with respect to the horizontal, the horizontal distance from the inlet 40 to the back 35a of the bottom surface of the dust collection chamber 35 is shortened, and the depth of the dust collection chamber 35 is reduced. Is inclined downward toward the inlet 40, so that dust that has entered the dust collecting chamber 35 from the inlet 40 gathers toward the bottom 35a of the bottom of the dust collecting chamber 35, and accumulates efficiently and without gaps. The volume of the dust collection chamber 35 can be used sufficiently effectively.

  Air containing fine dust such as lint passes through the ventilation portion 37, but the fine dust is filtered by the second dust separation means 38, and the clean air passes through the second dust separation means 38. Then, the electric blower 30 is guided.

  When the cleaning is completed, the electric blower 30 is stopped, and as shown in FIG. 7, the compression means 42 manually lowers the compression plate 43 to compress the dust accumulated in the dust collecting chamber 35 to make it compact. .

  As described above, the protrusion 41 can prevent the exhaust tube 36 from being clogged, and can reduce maintenance by reducing the adhesion of the second dust separating means 38.

  In the present embodiment, the protrusion 41 has been described as having a configuration in which the bottom surface of the dust collection chamber 35 is raised. However, the present invention is not limited to this, and a separate block-shaped member may be disposed in the dust collection chamber 35. . In that case, it is preferable that the wall surface of the dust collecting chamber 35 and the block-like member are bonded so that there is no gap. Moreover, the protrusion 41 may be hollow or solid.

  As described above, the vacuum cleaner according to the present invention has dust separated from the swirling air formed in the secondary swirl chamber and the secondary swirl chamber smaller than the primary swirl chamber, communicating with the lower portion of the primary swirl chamber. The inlet that flows into the dust collection chamber is opened on the outer peripheral side wall of the dust collection chamber, and a projecting body that protrudes from the bottom of the dust collection chamber to the vicinity of the lower end of the inlet is provided. Dust does not return to the secondary swirl chamber from the air inlet again due to air, and accumulates in the dust collection chamber due to its own weight, improving dust collection performance. The present invention can be applied to a vacuum cleaner having a dust collecting part of a type for separating and removing.

Reference Signs List 30 Electric blower 31 Air inlet 34 Primary swirl chamber 35 Dust collection chamber 36 Exhaust pipe 37 Ventilation portion 39 Secondary swirl chamber 39a Wall portion (wall portion separating secondary swirl chamber and dust collection chamber)
40 Inflow port 41 Projection body 45 Inclined surface

Claims (3)

An electric blower that generates a suction force, a substantially cylindrical primary swirl chamber that is installed on the upstream side of the electric blower and swirls air containing dust sucked by the electric blower to separate dust;
A secondary swirl chamber having a circular arc shape in a communicating part of the primary swirl chamber;
In a cyclonic electric vacuum cleaner that communicates with the secondary swirl chamber and includes a dust collection chamber that collects dust from the secondary swirl chamber.
In the outer circumferential direction of the primary swirl chamber, there is an intake port for sucking air containing dust, and in the vicinity of the center of the primary swirl chamber, there is a ventilation portion for exhausting dust separated air. And a central portion of the dust collection chamber is arranged so as to be shifted in the horizontal direction from the axial center of the secondary swirl chamber,
A wall that separates the secondary swirl chamber and the dust collection chamber is formed inside a circumference of the secondary swirl chamber, and dust swirling in the secondary swirl chamber is formed in the dust collection chamber on the wall portion. An electric vacuum cleaner having a structure including an inflow port and a protruding body protruding from a bottom surface of the dust collection chamber to a vicinity of a lower end portion of the inflow port. The electric vacuum cleaner according to claim 1, wherein a length of the projecting body along the horizontal direction of the inflow port is set to be equal to or longer than a length of the inflow port in the horizontal direction. The vacuum cleaner according to claim 1 or 2, wherein the top surface portion of the projecting body is an inclined surface that descends from the inlet to the inside of the dust collection chamber.