JP2011010887A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve suction force by preventing fine dust stored in a fine dust housing chamber from being stuck to a pleated filter again.SOLUTION: The vacuum cleaner includes: a mesh filter 13; the pleated filter 14; and dust removing means 28 for removing the fine dust stuck to the pleated filter 14. The vacuum cleaner is provided with: a dust guide portion which guides the removed fine dust sideways and obliquely below the pleated filter; a first negative pressure chamber 15 on the upstream side of first dust separation means; a second negative pressure chamber 16 on the downstream side of the first dust separation means; a fine dust ejection hole 23 which is provided at a partition 22a partitioning the first and second negative pressure chambers 15 and 16 and provided at least on one side of the pleated filter, which makes the negative pressure chambers 15 and 16 communicate with each other, and which when removing the dust from the pleated filter, allows the dust guide portion to discharge the removed fine dust to a dust collection unit 17 communicating with the negative pressure chamber 15; and a valve 26 which closes the fine dust ejection hole 23 during the operation of an electric blower, and opens the valve when removing the dust from the pleated filter 14 wherein the electric blower is stopped.

Description

  The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner having an improved dust discharge structure for a pleated filter.

  Generally, an electric vacuum cleaner has a structure in which an electric blower and a dust separator are housed in a vacuum cleaner body, and dust-containing air sucked into the cleaner body is removed by the dust separator by rotation of the electric blower.

  In this dust separation unit, a mesh filter or an inertia separation type separation unit is used as the first dust separation unit, and a pleated filter is often used as the second dust separation unit.

  In this type of electric vacuum cleaner, when fine dust passes through the pleated filter, the fine dust adheres to the pleated filter, which may cause clogging of the pleated filter.

  Therefore, a brush that moves along the upstream surface of the pleated filter is provided, the fine dust adhering to the filter surface is dropped, and the dust is collected in the fine dust container provided upstream of the pleated filter and below the pleated filter. A vacuum cleaner has been proposed (see, for example, Patent Documents 1 and 2).

JP 2005-261518 A JP 2008-264098 A

  However, since the vacuum cleaner described in Patent Document 1 does not include a fine dust rising prevention structure that prevents the fine dust accumulated in the fine dust accommodating portion, the vacuum cleaner flows from the upstream side to the downstream side of the pleat filter during cleaning. Due to the negative pressure of the air flow, there is a problem that fine dust accumulated in the fine dust container rises and reattaches to the pleated filter, leading to a reduction in suction force.

  Moreover, although the vacuum cleaner of patent document 2 is provided with the fine dust soaking prevention mechanism which prevents the soot of fine dust accumulated in the fine dust accommodating part, it flows from the upstream side of the pleat filter to the downstream side during cleaning. Due to the negative pressure of the air flow, there is a problem that fine dust accumulated in the fine dust container rises and reattaches to the pleated filter, leading to a reduction in suction force.

  The present invention has been made in consideration of the above-described circumstances, and the first dust forming the dust separation unit is disposed outside the air flow path system of the air flow that flows through the pleat filter and removes fine dust removed from the pleat filter. To provide a vacuum cleaner that improves the suction force by preventing the fine dust that has been discharged to the dust separation means side from rising and preventing the fine dust that has accumulated in the fine dust container from rising again, and reattaching to the pleated filter. With the goal.

  In order to achieve the above-described object, a vacuum cleaner according to the present invention is provided in a vacuum cleaner main body, a negative pressure chamber in which a negative pressure of an electric blower acts, and air sucked from a suction port communicating with the negative pressure chamber A first dust separating means for separating the dust and the dust, a dust collecting part for collecting the dust separated by the first dust separating means, a downstream side of the first dust separating means, and In a vacuum cleaner equipped with a pleat filter provided with a large number of protrusions and dust removing means for removing fine dust attached to the pleat filter by capturing dust by filtration to separate air and fine dust. The fine dust that has been removed is guided to the side of the pleat filter and obliquely downward, a dust guide part that is provided integrally or separately with the pleat filter, and a part of the negative pressure chamber. This first dust separation including A first negative pressure chamber on the upstream side of the stage, a part of the negative pressure chamber, a second negative pressure chamber on the downstream side of the first dust separating means, and the first negative pressure chamber And the second negative pressure chamber part, a partition plate provided on at least one side of the pleated filter, and provided on the partition plate, the first negative pressure chamber part and the second negative pressure chamber part The dust collection unit communicates the negative pressure chamber part of the pleated filter as appropriate, and the fine dust, which is guided by the dust guide part when the pleated filter removes the dust, communicates with the first negative pressure chamber part. And a valve mechanism that closes the fine dust discharge hole during operation of the electric blower and opens it when dust is removed from the pleated filter stopped by the electric blower.

  According to the vacuum cleaner according to the present invention, there is provided a vacuum cleaner that prevents suction of fine dust accumulated in the fine dust container, reduces adhesion to the pleat filter, and improves suction power. can do.

The perspective view which shows the external appearance of the vacuum cleaner which concerns on 1st Embodiment of this invention. The cross-sectional view of the vacuum cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention. The perspective view of the pleat filter used for the vacuum cleaner which concerns on 1st Embodiment of this invention. The top view which showed the attachment state of the pleat filter used for the vacuum cleaner which concerns on 1st Embodiment of this invention, and was notched partially. The side view which shows the attachment state of the pleat filter used for the vacuum cleaner which concerns on 1st Embodiment of this invention. The perspective view which shows the attachment state of the pleat filter of the 1st modification used for the vacuum cleaner which concerns on 1st Embodiment of this invention. The top view which showed the attachment state of the pleat filter of the 1st modification used for the vacuum cleaner which concerns on 1st Embodiment of this invention, and was partly notched. The top view which showed the attachment state of the pleat filter of the 2nd modification used for the vacuum cleaner which concerns on 1st Embodiment of this invention, and was notched partially. The top view which showed the attachment state of the pleat filter of the 3rd modification used for the vacuum cleaner which concerns on 1st Embodiment of this invention, and was partly notched. The top view which showed the attachment state of the pleat filter used for the vacuum cleaner which concerns on 2nd Embodiment of this invention, and was notched partially. The top view which showed the attachment state of the pleat filter of the 1st modification used for the vacuum cleaner which concerns on 2nd Embodiment of this invention, and was notched partially.

  A vacuum cleaner according to a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the vacuum cleaner 1 according to the first embodiment includes a vacuum cleaner body 2 provided with a connection port 2a and an exhaust port 2b (FIG. 2), a dust collecting hose 3, and a hand control tube 4. And an extension pipe 7 provided with a handle portion 5 and an operation portion 6, and a suction port body 8.

  The electric blower 10 is housed inside the cleaner body 2, and further, a dust collection chamber that forms a negative pressure chamber 11 on which the negative pressure of the electric blower 10 acts is formed.

  As shown in FIGS. 1 and 2, the negative pressure chamber 11 accommodates dust separation means 12 for separating the air sucked from the connection port 2a and dust, and the dust separation means 12 is a first part for removing coarse dust. A mesh filter 13 as dust separation means and a pleat filter 14 as a second separation means provided on the downstream side of the mesh filter 13 for capturing dust by filtration and separating air and fine dust are accommodated. Is done.

  The negative pressure chamber 11 is a part of the first negative pressure chamber portion 15 on the upstream side of the mesh filter 13 including the mesh filter 13 and the second negative pressure chamber portion 16 on the downstream side of the mesh filter 13. And divided.

  Furthermore, a dust collecting portion 17 that collects dust separated by the mesh filter 13 is provided at the bottom of the first negative pressure chamber 15, and the bottom of the first negative pressure chamber 15, that is, the dust collecting portion 17. A dust disposal hole 18 and an opening / closing lid 19 that closes the dust disposal hole 18 are provided at the bottom of the container. When the dust collected in the dust collection section 17 is thrown away, it is opened by an external operation and the dust is thrown away.

  The first dust separation means is not limited to a mesh filter, but may be an inertia separation system that rotates air at high speed to repel coarse dust. Moreover, the arrow in FIG. 2 shows airflow.

  As shown in FIGS. 3 to 5, the pleated filter 14 is provided with a plurality of ridges 20 a and 20 b in parallel, and the ridges 20 a and 20 b are substantially horizontally extending obliquely downward on both sides of the pleated filter 14. It is formed in a letter shape or a chevron shape (mountain shape).

  Further, the protrusions 20a and 20b have upper surfaces 21a and 21b formed as horizontal surfaces or rearwardly inclined surfaces to form the dust guide portion of the present invention integrally provided in the pleated filter 14, and the pleated dust is removed. The filter 14 is guided to the side and obliquely downward.

  A part between the first negative pressure chamber 15 and the second negative pressure chamber portion 16 shown in FIG. 2 is partitioned on the outer periphery of the pleated filter 14 having a substantially rectangular outer periphery, and at least one side of the pleated filter 14, for example, Partition plates 22a and 22b provided on the entire circumference are provided.

  The partition plate 22a provided on both sides of the pleat filter 14 is provided with a fine dust discharge hole 23, and the bottom surface of the fine dust discharge hole 23 extends from the second negative pressure chamber portion 16 side to the dust collection portion side. It has an inclined surface that goes down to ensure the discharge of fine dust.

  The lower end 24b of the protrusion 20b does not reach the partition plate 22a, and a gap g is provided between the lower end 24b and the partition plate 22a so that fine dust can fall. On the other hand, the lower end 24a of the lowermost row of protrusions 20a reaches the fine dust discharge hole 23 provided in the partition plate 22a.

  Thus, the fine dust guided on the upper surface of the ridge 20b falls from the lower end 24b onto the upper surface 21a in the vicinity of the lower end 24a of the lowermost ridge 20a, and is guided by the upper surface 21a. The dust discharge hole 23 is reached.

  Further, as shown in FIG. 2, the fine dust discharge hole 23 is provided at a corner portion of the dust collection portion 17 communicating with the first negative pressure chamber portion 15, and a flow path system for airflow flowing through the pleated filter 14. The fine dust container 25 located outside and the second negative pressure chamber 16 communicate with each other as appropriate, and are opened and closed by a normally open valve body 26.

  The valve body 26 is pivotally attached to the partition plate 22a at the upper end thereof, and when the electric blower 10 is stopped, that is, when no negative pressure is applied to the second negative pressure chamber 16, the fine dust discharge hole 23 is opened. The spring 27 is biased outward.

  Therefore, when the electric blower 10 is stopped, the fine dust discharge hole 23 is opened, and the second negative pressure chamber portion 16 and the fine dust storage portion 25 communicate with each other. On the other hand, when the electric blower 10 is in operation, the normally open valve body 26 is sucked by the negative pressure of the second negative pressure chamber 16 to close the fine dust discharge hole 23.

  Further, on the downstream side of the pleat filter 14, dust removing means 28 is provided that applies fine vibrations to the pleated filter 14 to remove fine dust attached to the pleated filter 14. The dust removing means 28 is composed of a solenoid (not shown), an actuator attracted by the solenoid, and an actuator attached to the actuator and impacting the pleat filter 14, and impacting the back surface of the pleated filter 14 with this actuator. Try to vibrate.

  In order to open and close the valve body 26, a valve opening / closing mechanism including a spring, a solenoid, and an actuator may be provided. The dust removing means 28 is composed of a solenoid, an actuator and an actuator, but the impact imparting projection is moved up and down along the pleat filter, and the ridge is sequentially repelled by the impact imparting projection so that the pleat filter is impacted to remove dust. It may be. Further, the gap between the pleated filter and the partition plate is closed by an appropriate closing member.

  Next, cleaning using the electric vacuum cleaner of the present embodiment will be described.

  When the electric vacuum cleaner 1 is used, as shown in FIGS. 1 and 2, the fine dust discharge hole 23 in the open state when the electric blower 10 is stopped is caused by the operation of the electric blower 10 in the negative pressure chamber 11, that is, the first pressure chamber 11. The negative pressure chamber portion 15, the second negative pressure chamber portion 16 and the dust collection portion 17 become negative pressure, and the valve element 26 is spring-loaded by the pressure difference between the second negative pressure chamber portion 16 and the dust collection portion 17. It is sucked and closed against 27 (FIG. 4).

  Due to the negative pressure in the negative pressure chamber 11, dust accumulated on the surface to be cleaned such as the floor surface is sucked into the first negative pressure chamber portion 15 together with air through the suction port 8 and the dust collecting hose 3. The coarse dust is removed at 13, and the fine dust that has passed through the mesh filter 13 is removed by the pleated filter 14.

  The dust-removed air is exhausted out of the cleaner body 2 from the exhaust port 2b through the electric blower 10.

  During this cleaning process, fine dust accumulates on the pleated filter 14.

  Therefore, dust removal of the pleat filter 14 is performed at an appropriate timing.

  In the dust removal process, the electric blower 10 is stopped, and the valve body 26 is opened and the fine dust discharge hole 23 is opened as shown by a dotted line in FIG.

  In this state, the dust removing means 28 is operated, and an impact is applied to the back surface of the pleated filter 14 by the operating element via the solenoid and the actuator.

  When an impact is applied to the pleated filter 14, fine dust adhering to the upper surface 21b of the ridge 20b of the pleated filter 14 floats up, and fine dust adhering to other places falls on the upper surface 21a immediately below. Can be received.

  When an impact continues to be applied to the pleated filter 14 with the fine dust riding on the upper surface 21a in this way, as shown in FIGS. 3 and 4, the dust guide portion of the present invention is formed and extends obliquely downward. Slide down along the upper surfaces 21a, 21b of the ridges 20a, 20b formed in a substantially F shape (mountain shape) to reach the lower end 24b, and from the lower end 24b through the gap g, the lowermost ridge 20a Together with the fine dust that falls down and slides down on the upper surface 21a of the lowermost row of protrusions 20a, it accumulates in the fine dust container 25 through the lower end 24a and the fine dust discharge hole 23.

  When such a dust removal operation is performed for a predetermined time, the dust removal process ends.

  This dust removal process restores the dust absorption capability of the pleated filter 14. Further, in this dust removal process, fine dust removed from the pleated filter 14 is discharged to a fine dust accommodating portion 25 provided on the side of the pleated filter 14 by the protrusions 20a and 20b forming the dust guide portion of the present invention. Therefore, it does not collect in front of the pleat filter 14 (upstream side).

  When cleaning the electric blower 10 again, the valve body 26 is sucked by the pressure difference between the second negative pressure chamber portion 16 and the fine dust accommodating portion 25, and the fine dust discharge hole 23 in the open state is Closed.

  When the fine dust discharge hole 23 is closed, the dust-containing air is sucked into the first negative pressure chamber 15, the coarse dust is removed by the mesh filter 13, and the fine dust that has passed through the mesh filter 13 is removed by the pleated filter 14. To do.

  On the other hand, since the fine dust container 25 tends to become a dead water area, a part of the fine dust stays in the fine dust container 25, and the remaining part flows into the dust collector 17 and becomes coarse dust removed by the mesh filter 13. Tangle.

  Therefore, the amount of fine dust once removed from the pleat filter 14 is extremely reduced.

  The fine dust accumulated in the fine dust container 25, the fine dust entangled with the coarse dust, and the coarse dust accumulated in the dust collecting portion 17 are opened outside the cleaner body 2 by opening the opening / closing lid 19 after the dust removal process is completed. Thrown away.

  According to the vacuum cleaner of the first embodiment, the vacuum cleaner that prevents suction of fine dust accumulated in the fine dust container and reduces re-adhering to the pleated filter, thereby improving the suction force. Is realized.

  Moreover, the pleated filter 34 of the 1st modification used for the vacuum cleaner of 1st Embodiment is demonstrated.

  The pleated filter 14 shown in FIG. 4 used in the vacuum cleaner of the first embodiment has only the lower end 24a of the lowermost row of protrusions 20a reaching the fine dust discharge hole 23, whereas the first pleated filter 14 shown in FIG. In the modified pleated filter, the lower ends of all the protrusions reach the fine dust discharge holes.

  For example, as shown in FIGS. 6 and 7, the lower end portions 24a of all the protrusions 20c constituting the dust guide portion of the present invention of the pleated filter 34 reach the fine dust discharge hole 23, and the fine dust discharge hole 23 is substantially omitted. It is formed in a rectangular shape that extends over the entire length of the partition plate 22a.

  Thereby, the fine dust sliding down the upper surface 21a of the protrusion 20c reaches the fine dust discharge hole 23 directly and is stored in the fine dust accommodating part 25 (FIG. 2).

  Furthermore, the pleated filter of the 2nd modification used for the vacuum cleaner of 1st Embodiment is demonstrated.

  The pleated filter 14 shown in FIG. 4 used in the vacuum cleaner of the first embodiment has all the ridges 20a and 20b formed in a substantially square shape, whereas the second pleat filter 14 shown in FIG. The protrusions 20d and 20e of the pleated filter 44 of the modified example are formed in a single-flow substantially square shape.

  The lower end 24b of the ridge 20e does not reach the partition plate 22a, and a gap g is provided between the lower end 24b and the partition plate 22a so that fine dust can fall. On the other hand, the lower end 24a of the lowermost row of protrusions 20d reaches the fine dust discharge hole 23 provided in the partition plate 22a.

  When the pleated filter 44 of the second modification is used, the fine dust discharge hole 23 and the valve body 26 may be one.

  Moreover, the pleat filter of the 3rd modification used for the vacuum cleaner of 1st Embodiment is demonstrated.

  The lower end portion of the ridge of the pleated filter of the second modification does not reach the partition plate, and a gap is provided between the lower end portion and the partition plate so that fine dust can fall. The lower ends 24a of all the protrusions 20f of the pleated filter 54 of the third modified example reach the fine dust discharge hole 23, and the fine dust discharge hole 23 is formed in a rectangular shape that substantially extends over the entire length of the partition plate 22a. .

  When the pleated filter 54 of the third modification is used, the fine dust discharge hole 23 and the valve body 26 may be one.

  Next, the vacuum cleaner which concerns on 2nd Embodiment of this invention is demonstrated.

  Whereas the pleat filter used in the vacuum cleaner of the first embodiment is integrally provided with the ridge that forms the dust guide portion of the present invention in the pleat filter used in the vacuum cleaner of the first embodiment, the pleat filter used in the vacuum cleaner of the second embodiment includes: A dust guide member that separately forms a dust guide portion is provided.

  For example, the vacuum cleaner of 2nd Embodiment is equipped with the structure similar to the vacuum cleaner of 1st Embodiment, and is provided with the pleat filter 64 as shown in FIG.

  The pleated filter 64 is provided with a plurality of protrusions 20g having a mountain-shaped cross section in parallel.

  A separate dust guide member 66 constituting the dust guide portion of the present invention is provided below the pleat filter 64.

  The dust guide member 66 has a mountain shape in plan view, and includes a receiving portion 66a wider than the height of the protrusion 20g and a rising portion 66b rising from the receiving portion 66a on both sides, and has a substantially U-shaped cross section.

  Thereby, when dust is removed from the pleated filter 64, the fine dust removed from the pleated filter 64 falls to the receiving portion 66a, is guided by the dust guide member 66, and is passed through the fine dust discharge hole 23 to the fine dust accommodating portion 25. (FIG. 2).

  According to the vacuum cleaner of the second embodiment, it is possible to use a pleated filter having a ridge having a mountain-shaped cross section, and further prevents fine dust accumulated in the fine dust container from rising. Thus, a vacuum cleaner that reduces the re-attachment to the pleated filter and improves the suction force is realized.

  Moreover, the pleated filter of the 1st modification used for the vacuum cleaner of 2nd Embodiment is demonstrated.

  The pleated filter 64 shown in FIG. 10 used in the vacuum cleaner of the second embodiment is provided with a plurality of parallel projections 20g having a mountain shape in cross section, whereas the first modification of the second embodiment. In the pleated filter, a protrusion having a mountain shape in cross section is formed in a substantially hem shape (a mountain shape).

  For example, as shown in FIG. 11, a dust guide similar to that used in the first modified example is provided below a pleated filter 74 provided with a plurality of protrusions 20h each having a mountain-like cross-sectional shape and a substantially ridge shape. A member 66 is provided.

  Thereby, when dust is removed from the pleat filter 74, the fine dust removed from the pleat filter 74 slides down the upper surface 21d, falls onto the dust guide member 66, is guided by the dust guide member 66, and is discharged into the fine dust discharge hole. 23, and is stored in the fine dust container 25. Even in the pleated filter of the first modified example, it is possible to use a pleated filter having protrusions having a mountain-shaped cross section.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Vacuum cleaner main body 2a Connection port 2b Exhaust port 3 Dust collection hose 4 Hand control tube 5 Handle part 6 Control part
7 Extension pipe 8 Suction port 10 Electric blower 11 Negative pressure chamber 12 Dust separating means 13 Mesh filter 14 Pleated filter 15 First negative pressure chamber portion 16 Second negative pressure chamber portion 17 Dust collecting portion 18 Dust disposal hole 19 Opening and closing Lids 20a, 20b Projections 21a, 21b Upper surfaces 22a, 22b Partition plate 23 Fine dust discharge holes 24a, 24b Lower end 25 Fine dust accommodating part 26 Valve element 27 Spring 28 Dust removing means

Claims (6)

A negative pressure chamber provided in the vacuum cleaner body, on which the negative pressure of the electric blower acts,
First dust separation means for separating air and dust sucked from the suction port communicating with the negative pressure chamber;
A dust collecting part for collecting the dust separated by the first dust separating means;
A pleat filter provided on the downstream side of the first dust separating means, capturing dust by filtration to separate air and fine dust, and provided with a plurality of protrusions;
In a vacuum cleaner provided with dust removing means for removing fine dust adhering to the pleated filter,
Dust dust removed from the pleated filter is guided to the side of the pleated filter obliquely downward, and a dust guide provided integrally or separately with the pleated filter;
A first negative pressure chamber portion which forms part of the negative pressure chamber and is upstream of the first dust separation means including the first dust separation means;
A part of the negative pressure chamber, a second negative pressure chamber portion downstream of the first dust separating means; and
A partition plate provided between the first negative pressure chamber and the second negative pressure chamber, and provided on at least one side of the pleated filter;
Provided on the partition plate, the first negative pressure chamber portion and the second negative pressure chamber portion are appropriately communicated, and fine dust removed when the pleated filter is removed is guided by the dust guide portion. A fine dust discharge hole for discharging the fine dust to be discharged to the dust collecting portion communicating with the first negative pressure chamber portion,
A vacuum cleaner comprising: a valve mechanism that closes the fine dust discharge hole during operation of the electric blower and opens when dust removal of the pleated filter stopped by the electric blower. 2. The electric vacuum cleaner according to claim 1, wherein the protrusions of the pleat filter have a substantially C shape or a square shape extending obliquely downward on both sides of the pleat filter. 2. The vacuum cleaner according to claim 1, wherein the protrusion of the pleat filter has a square shape extending obliquely downward toward one side of the pleat filter. 4. The electric vacuum cleaner according to claim 2, wherein a protrusion of the pleated filter has a horizontal surface or a rearwardly inclined surface, and forms the dust guide part. 5. 2. The electricity according to claim 1, wherein the ridge of the pleated filter extends in a vertical or C-shape, and a separate substantially H-shaped dust guide portion is provided at a lower end portion of the ridge. Vacuum cleaner. 6. The electricity according to claim 1, wherein a bottom surface of the fine dust discharge hole is an inclined surface that descends from the second negative pressure chamber portion side toward the dust collection portion side. Vacuum cleaner.

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