JP2013022224A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner solving the following problem: in a conventional cyclone-type vacuum cleaner, coarse dusts and fine dusts are collected respectively in a dust collecting chamber and an inner tube of the dust collecting chamber which have been partitioned, the fine dusts are dispersed around a dust box when the lid is opened to drop the dusts in the dust box.SOLUTION: The vacuum cleaner is structured so that a first check valve 50 opens due to a negative pressure in a space formed by the dust collecting chamber 22 and the bottom surface of a compression board 40, and both air and fine dusts 8 flow to the dust collecting chamber 22 collecting the coarse dusts 4 from a fine dust chamber 39. Because the coarse dusts 4 and fine dusts 8 are mixed together, the fine dusts 8 are embedded in gaps among the coarse dusts 4 and then compressed. Because the coarse dusts 4 and fine dusts 8 are combined not to fly apart around the dust box when the lid 34 of the cleaner is opened to drop the dusts into the dust box, the vacuum cleaner is clean and user-friendly.

Description

  The present invention relates to a cyclone dust collecting device for a vacuum cleaner.

  Conventionally, as this type of cyclone type vacuum cleaner, there has been a configuration in which sucked dust is separated and accommodated between coarse dust and fine dust (for example, see Patent Document 1). The coarse dust is, for example, cotton dust, and the fine dust is, for example, fine sand particles.

  FIG. 10 is a cross-sectional view of the swirl chamber 1 and the dust collection chamber 2 of the conventional vacuum cleaner described in Patent Document 1. The dust mixed air sucked from the nozzle (not shown) of the vacuum cleaner by the suction force generated by the electric blower (not shown) located downstream of the swirl chamber 1 made of transparent resin is the upper part of the swirl chamber 1. Enters the swirl chamber 1 from the intake port 3 and swirls in the swirl chamber 1. At that time, dust is blown outside by centrifugal force, and relatively large coarse dust 4 accumulates at the bottom of the dust collection chamber 2 below the swirl chamber 1. On the other hand, the air separated from the dust passes through the ventilation part 5 and escapes to the pleated filter 7 communicating with the exhaust port 6.

  Here, fine dust 8 or the like that could not be sufficiently separated in the swirl chamber 1 is captured by the pleated filter 7. The fine dust 8 is knocked down by the filter cleaning mechanism 9 and accumulates at the bottom of the dust collecting chamber cylinder 10. As shown in FIG. 11, the bottom of the dust collection chamber 2 is a lid 12 having a hinge 11 on one side, and the coarse dust 4 and fine dust 8 accumulated in the dust collection chamber 2 open the lid 12. Thrown away. At this time, the lid 12 is opened on the trash box with the lid 12 facing down, and the coarse dust 4 and the fine dust 8 are dropped and discarded.

JP 2009-56039 A

However, in the conventional vacuum cleaner, since dust and dust are collected in the dust collection chamber 2 and the dust collection chamber cylinder 10 which are separated separately, the dust is opened on the trash can. When it was discarded, there was a problem that fine dust flew around and scattered.
The present invention solves the above-described conventional problems, and can provide a clean and easy-to-use vacuum cleaner that does not cause fine dust to fly around when it is discarded.

In order to solve the above-described conventional problems, an electric vacuum cleaner according to the present invention is configured to rotate an air blower that generates suction force and air including dust that is installed upstream of the electric blower and sucked by the electric blower. A substantially cylindrical swirling chamber for separating the dust, a substantially cylindrical dust collecting chamber located below the swirling chamber and collecting dust separated in the swirling chamber, and dust-containing air in the outer circumferential direction of the swirling chamber. An intake port for suction, an outer peripheral surface in the vicinity of the center of the swirl chamber, an exhaust pipe provided with a ventilation part for exhausting air from which dust has been separated, and arranged on the leeward side of the exhaust pipe, A filter that filters fine dust from the air exhausted from the exhaust tube, a fine dust chamber that is disposed below the swirl chamber, an inner space communicates with the inner side of the exhaust tube, and is adjacent to the dust collection chamber; The swirl chamber and the dust collection chamber have their center axes parallel to the horizontal direction. And an inflow port through which dust-containing air swirling in the swirl chamber flows into the first dust collection chamber along the inner wall surface of the swirl chamber outer wall is disposed so as to partially overlap in the height direction. An arc-shaped partition wall connected to the inner opening line of the inflow port is provided in the swirl chamber, and a transfer passage is formed between the arc-shaped partition wall and the outer wall of the swirl chamber, A compression plate for compressing dust accumulated in the dust collection chamber, a compression plate shaft that applies pressure to the compression plate, and a gap between the compression plate and the dust collection chamber is filled in contact with the inner wall of the dust collection chamber A first check valve at a position lower than the inflow port at the communicating portion between the seal member and the dust collection chamber and the fine dust chamber, and penetrates the compression plate vertically. The communication portion has a second check valve, and when the compression plate moves from the lower end to the upper end, the dust collecting chamber and the The first check valve is opened by the negative pressure of the space formed by the lower surface of the compression plate, and air is configured to flow from the fine dust chamber to the dust collection chamber. When moving to, the second check valve is opened by the positive pressure of the space formed by the dust collection chamber and the lower surface of the compression plate, and the air flows upward from below the compression plate. .

  In the electric vacuum cleaner of the present invention, coarse dust and fine dust are mixed every time the compressed plate is lifted after cleaning work, so the fine dust is buried in the gap between the coarse dust and compressed. Therefore, when the dust is discarded by opening the lid on the trash can etc., the coarse dust and the fine dust are compressed together so that they do not fly around and are clean and easy to use. Machine can be provided.

The principal part perspective view of the vacuum cleaner in Embodiment 1 of this invention Side surface sectional drawing of the principal part of the vacuum cleaner in the same embodiment Side sectional view of the main part viewed from another angle of the electric vacuum cleaner in the same embodiment Main part plane sectional drawing of the vacuum cleaner in the embodiment Partial sectional view of the electric vacuum cleaner in the same embodiment The principal part fragmentary perspective view of the vacuum cleaner in the same embodiment Side sectional view of the main part in a state where the compression plate is lowered in the same embodiment Side cross-sectional view of the main part in a state where the compression plate is raised in the same embodiment Cross-sectional plan view of the main part in a state where the compression plate is raised in the same embodiment Side sectional view of the main part of a conventional vacuum cleaner The block diagram which shows the state which has discarded the dust of the vacuum cleaner

The first invention includes an electric blower that generates a suction force, a substantially cylindrical swirl chamber that is installed upstream of the electric blower and swirls air containing dust sucked by the electric blower to separate the dust, A substantially cylindrical dust collection chamber that is located below the swirl chamber and collects dust separated in the swirl chamber, an inlet for sucking dust-containing air in an outer circumferential direction of the swirl chamber, Disposed on the outer peripheral surface near the center and provided with a ventilation section for exhausting air from which dust has been separated, and disposed on the leeward side of the exhaust cylinder to filter fine dust from the air exhausted from the exhaust cylinder A fine dust chamber disposed below the swirl chamber, an inner space communicating with the inside of the exhaust pipe, and adjacent to the dust collection chamber, and the swirl chamber and the dust collection chamber, The center axes of each other are shifted parallel to the horizontal direction, and some of them overlap in the height direction. Disposed in the swirl chamber, the dust-containing air swirling in the swirl chamber has an inlet through which the dust-containing air flows along the inner wall surface of the swirl chamber and flows into the first dust collection chamber, An arc-shaped partition wall connected to the opening line is provided, a transfer passage is formed between the arc-shaped partition wall and the outer wall of the swirl chamber, and the dust collected in the dust collection chamber is compressed. A compression plate, a compression plate shaft that applies pressure to the compression plate, a seal member disposed so as to fill a gap between the compression plate and the dust collection chamber and abut against an inner wall of the dust collection chamber, and the dust collection chamber; A first check valve in the first communication part between the fine dust chambers is provided at a position lower than the inflow port, and a second communication part that vertically penetrates the compression plate is provided in the second communication part. A non-return valve, which is formed by the dust collection chamber and the lower surface of the compression plate when the compression plate moves from the lower end to the upper end. The first check valve is opened by the negative pressure of the air, so that air flows from the fine dust chamber to the dust collection chamber, and when the compression plate moves from the upper end to the lower end, The second check valve is opened by the positive pressure of the space formed by the dust collection chamber and the lower surface of the compression plate, and the air flows upward from below the compression plate.

  As a result, the dust-containing air flowing in from the intake port swirls in the swirl passage defined by the inner wall of the swirl chamber outer wall and the exhaust tube, and the transfer passage defined by the inner wall of the swirl chamber outer wall and the arc-shaped partition wall. However, the airflow can be smoothly drawn to the adjacent dust collection chamber, and the intake port, the vent of the exhaust pipe, and the inlet and outlet to the dust collection chamber are Since the swirling airflow has a diagonally downward component, it is arranged with a height difference in order, and it is configured to be obliquely downward from the inlet of the swirling chamber toward the bottom position of the dust collecting chamber, In the dust collection chamber, dust is reliably guided from the inlet to the bottom portion, and the dust can be separated while the airflow rises to the outlet above the dust collection chamber.

  And since the dust collected in the dust collection chamber after suction can be reduced by lowering the compression plate and applying pressure, the conventional dust capacity can be saved with a small dust collection volume. .

  In addition, when the lifting shaft is pushed down and the compression plate moves downward from the upper end portion to compress coarse dust, the internal pressure in the space below the compression plate in the dust collection chamber increases, so the first check valve is closed. No change occurs in the dust chamber. However, the second check valve provided on the compression plate opens and the air below the compression plate in the dust collecting chamber escapes upward. And while the electric blower before starting cleaning is stopped, the elevating shaft is raised and the compression plate is moved to the upper end of the dust collecting chamber.

  At this time, since the second check valve of the compression plate is closed, the internal pressure below the compression plate in the dust collecting chamber decreases as the compression plate rises. For this reason, the first check valve is opened, and the fine dust in the fine dust chamber enters the dust collecting chamber through the communication port due to the negative pressure, and is mixed with the coarse dust 4 in the dust collecting chamber. Thus, every time the compression plate moves up and down, coarse dust and fine dust are mixed, so that the fine dust is buried in the gap between the coarse dust and compressed. Therefore, when the dust is disposed of by opening the lid on the trash can etc., the coarse and fine dust are integrated, so it does not fly around and scatters, providing a clean and easy-to-use vacuum cleaner. Can do.

  According to a second aspect of the present invention, in the dust collector described in the first aspect of the invention, the timing for moving the compression plate downward to compress the dust is the timing when the electric blower is stopped during operation, and the compression plate is moved upward. The timing of moving and releasing the dust from compression is configured to be performed when the electric blower is stopped immediately before the cleaning operation.

  Thereby, when the compression plate is lowered to the lower end of the dust collecting chamber, the electric blower is surely stopped and no airflow is sucked, so that dust does not accumulate on the compression plate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
The vacuum cleaner in the 1st Embodiment of this invention is demonstrated using figures.
FIG. 1 is an external perspective view of a cyclone dust collecting device for a vacuum cleaner according to a first embodiment of the present invention. 2 is a side cross-sectional view of the main part, and FIG. 3 is a side cross-sectional view of the main part viewed from another angle.

As shown in FIG. 1, the cyclone dust collecting apparatus includes a dust collecting case 23 including a swirling chamber 21 that takes in air containing dust and generates a swirling airflow, a dust collecting chamber 22 that collects dust, and a second dust separating means. And a second dust collecting case 24 which is disposed above the dust collecting case 23 and connected to the dust collecting case 23 and a cleaner body (not shown) incorporating an electric blower (not shown). doing.

  The swirl chamber 21 of the dust collection case 23 communicates with the intake port 25 having a suction passage attached so as to be tangential to the inner peripheral surface of the substantially cylindrical outer shape, and the second dust collection case 24 at the center. A substantially cylindrical exhaust cylinder 26 is disposed.

  A ventilation portion 27 is formed by a filtration filter such as a mesh filter or an etching filter on the outer peripheral side surface of the exhaust cylinder 26 so that coarse dust does not pass through the second dust collection case side 24 with certainty.

  As shown in FIG. 2, in the swirl chamber 21, the positional relationship between the intake port 25 and the exhaust pipe 26 and the intake port 25 are arranged in a tangential direction on the outer peripheral inner peripheral surface of the swirl chamber 21. The dust-containing air flowing in from the intake port 25 turns into a flow swirling along the inner wall surface of the outer wall of the swirl chamber 21. The inner space of the exhaust tube 26 communicates with the second dust collection case 24, and the air that has passed through the ventilation portion 27 of the exhaust tube 26 flows to the second dust collection case 24.

  Next, as shown in FIGS. 2 and 3, the dust collection chamber 22 is a substantially cylindrical cylindrical body having an inner diameter substantially equal to or somewhat smaller than the inner diameter of the swirl chamber 21. Each center axis is arranged at a position shifted in parallel with the horizontal direction, and a part of the upper end of the dust collection chamber 2 enters the inside of the swirl chamber 21 in the height direction.

  That is, as shown in FIG. 4, the portion where the swirl chamber 21 and the dust collection chamber 22 overlap is provided with a partition wall 28 having a concave shape on the swirl chamber 21 side and a substantially cylindrical shape on the dust collection chamber 22 side.

  In a portion where the outer wall surface of the swirl chamber 21 and the outer wall surface of the dust collection chamber 22 intersect, a straight wall 29 is provided on one side so as to contact the inner circumference of each other, and the partition wall In the side surface portion 28, communication ports are provided in the vicinity of both sides intersecting with the outer wall surface of the swirl chamber 21, and the edge of each communication port is made to coincide with the inner wall surface.

  Here, one of the two communication ports is an inlet 30 through which the airflow swirling in the swirl chamber 21 flows into the dust collection chamber 22, and the other is an airflow returning from the dust collection chamber 22 to the swirl chamber 21. The inflow port 30 is configured on the side provided with the linear wall 29 that connects the outer wall surface of the swirl chamber 21 and the outer wall surface of the dust collection chamber 22 so as to contact each other. It is composed.

  Further, the opening edges on the inner side of the inflow port 30 and the outflow port 31 are connected by an arc-shaped partition wall 32, and the arc of the arc-shaped partition wall 32 is made to coincide with the arc of the upper exhaust pipe 26, and The exhaust pipe 26 and the arcuate partition wall 32 are connected to each other.

  And the inflow port 30 and the outflow port 31 are from the ridgeline where each outer wall surface of each of the swirl chamber 21 and the dust collection chamber 22 intersects to the ridgeline where the partition wall 28 of the dust collection chamber and the arcuate partition wall 32 intersect. Open in the range of.

In addition, the outflow port 31 is formed with a ventilation lattice 33 in which the size of the opening opening of the lattice is set in a range of 1 to 2 mm. The bottom portion of the dust collection chamber 22 is open, and is configured to be closed while ensuring air tightness with a bottom lid 34 that is pivotally supported. From the experimental results, it can be seen from the experimental results that when the size of the opening front is set to 3 mm or more, fine dust such as lint tends to pass through the swirl chamber 21 without being caught by the lattice. However, when the opening width was set at 2 mm, lint was caught on the ventilation grid 33 and the passage to the swirl chamber 21 side could be greatly suppressed.
The size was set to m.

  As shown in FIG. 5, the intake port 25 of the swirl chamber 21, the ventilation portion 27 of the exhaust pipe 26, and the inflow port 30 and the outflow port 31 where the swirl chamber 21 and the dust collection chamber 22 communicate with each other increase in order from the top. As a result, the dust-containing air that has flowed in from the intake port 25 enters the inlet 30 while turning the swirl chamber 21 obliquely downward from the intake port 25, and extends as it is. It flows to the bottom position of the dust collection chamber 22 while turning obliquely downward in the dust collection chamber 22.

  The heavy coarse dust continues to swirl as it is at the bottom portion of the dust collecting chamber 22, and the airflow separated from the coarse dust rises while swirling, and fine dust such as lint riding on this ascending airflow is discharged from the outlet. The air that has been caught by the ventilation grid 33 and further separated in dust passes through the ventilation grid 33 and returns to the swirl chamber 21. It flows to the dust collecting case 24.

  Here, in the dust collection chamber 22, when coarse dust continues to swirl at the bottom position due to its weight, it becomes like marimo while being entangled, and fine dust is also entangled there together. Dust and air entangled with fine dust are separated.

  Next, in the airflow swirling and rising in the dust collection chamber 22 toward the outlet 31, some fine dust such as lint is carried, but the lint is caught by the ventilation grid 33, and when it accumulates, the lint is It comes to play the role of a filter, and the passage of fine dust to the swirl chamber 21 side can be further suppressed. That is, when lint accumulates, it becomes a state similar to a nonwoven fabric filter.

  In this manner, in the swirl chamber 21, the swirl passage extending from the intake port to the inlet to the dust collecting chamber 22 and the exhaust pipe 26 and the arc-shaped partition wall 32 and the inner peripheral wall of the swirl chamber outer wall are connected to the swirl chamber 21. Since the transfer passage 35 is formed (FIG. 6), the swirling airflow can be more smoothly guided from the swirling chamber 21 to the dust collecting chamber 22.

  In the conventional cyclone configuration, the swirl chamber 21 and the dust collection chamber 22 are generally arranged coaxially. However, even if the swirl chamber 21 and the dust collection chamber 22 are shifted in parallel, the swirl chamber 21 is arranged in parallel. And the dust collection chamber 22 are arranged in an up-and-down direction, that is, in an oblique vertical direction, and an air flow inlet and outlet are arranged between the swirl chamber 21 and the dust collection chamber 22 so as to draw an elliptical orbit. By providing, it becomes possible to form a centrifugal swirl airflow similar to a general cyclone airflow.

  Thereafter, the air that has passed through the exhaust pipe 26 flows to the second dust collecting case 24. In the second dust collecting case 24, a non-woven filter 36 folded as a pleat is disposed as a second dust separating means, and minute fine dust that has come out of the exhaust tube 26 is removed from the non-woven filter. Only the air that has been filtered and cleaned by passing through the non-woven fabric filter 36 is guided to the electric blower.

  Here, as shown in FIG. 2, on the downstream side of the non-woven fabric filter 36, a dust collector 37 that attaches impact vibration to the filter surface is attached, and after the suction operation, the dust collection case is connected to the dust collector 37. By the reciprocating motion from the linear drive part 38 built in 23, the filter surface is struck by the dust remover 37, and fine dust adhering to the surface of the non-woven fabric filter 36 is dropped by impact.

  The fine dust that has been knocked down passes through the exhaust cylinder 26 and the inner space of the arcuate partition wall 32 and falls to the fine dust chamber 39 provided below the swirl chamber 21 and communicating with the arcuate partition wall 32. I am doing so.

  As shown in FIG. 2, the fine dust chamber 39 is disposed adjacent to the dust collection chamber 22, and the bottom of the dust collection chamber 22 is open and closed by a bottom lid 34. At the upper end of the dust collection chamber 22, a compression plate 40 having a bottom surface as a plane and moving up and down in the axial direction of the dust collection chamber 22 is disposed. A lift shaft 41 is attached to the compression plate 40 at a position shifted from the center of the compression plate 40 to the side opposite to the swirl chamber 21. Further, a spring 42 is incorporated coaxially with the elevating shaft 41 so as to be biased upward in the drawing.

  An operation lever 43 is provided on the upper end side surface of the elevating shaft 41, and when the operation lever 43 is pressed, the elevating shaft 41 is lowered and the compression plate 40 is simultaneously pushed down. The sliding operation unit 44 is provided with a spring-biased pivotable latch 45, an acute angle portion 46 is provided at a part of the upper periphery of the elevating shaft 41, the elevating shaft 41 is pushed down, and an acute angle angle is provided. When the portion 46 comes to the position of the latch 45, the latch 45 is engaged and locked to the acute angle portion 46.

  The end of the latch 45 opposite to the end that meshes with the acute angle portion 46 is a push button 47 that protrudes to the outside, and when the push button 47 is pushed in, the latch 45 engages with the acute angle portion 46. The lift shaft 41 is lifted by the force of the spring 42 and the compression plate 40 returns to the upper end of the dust collection chamber 22.

  Further, a sealing member 48 made of a flexible member such as rubber is disposed around the compression plate 40, and abuts against the wall surface of the compression plate 40 and the dust collecting chamber 22 to fill the space between the compression plate 40 and the compression plate 40. This prevents air leakage from the top to the bottom and from the bottom to the top of the compression plate 40.

  In addition, there is a communication port 49 (first communication portion) at the lower end of the fine dust chamber on the wall 29 of the dust collection chamber 22 and the fine dust chamber 39, and the first check valve 50 is closed so as to close the communication port 49. Is provided. When the compression plate 40 moves through the dust collection chamber 22 from the lower end to the upper end, the first check valve 50 is opened by the negative pressure of the space formed by the dust collection chamber 22 and the lower surface of the compression plate 40, and the air It is configured to flow from the fine dust chamber 39 to the dust collection chamber 22.

  Further, the compression plate 40 has a communication port (second communication portion) 51 that communicates with the upper and lower sides, and a second check valve 52 is provided so as to close the communication port (second communication portion) 51. When the compression plate 40 moves from the upper end to the lower end, the second check valve 52 is opened by the positive pressure in the space formed by the dust collection chamber 22 and the lower surface of the compression plate 40, and the air is below the compression plate 40. It flows so that it may flow upward.

  In the state where the compression plate 40 is stored at the upper end of the dust collection chamber 22 as shown in FIG. 6, the bottom surface of the compression plate 40 coincides with the upper edges of the inlet 30 and the outlet 31 to the dust collection chamber 22. Or arranged so as to be positioned slightly above the upper edge.

Next, the operation of the compression plate 40, the first exhaust valve, and the second exhaust valve will be described with reference to FIGS.
FIG. 7 is a cross-sectional view of the main part when the operation of lowering the compression plate is performed in the dust collector in the first embodiment. FIG. 8 is a cross-sectional view of the main part during the operation of raising the compression plate.

  When dust is sucked in and cleaning is completed and the electric blower is stopped, as shown in FIG. 7, the lifting shaft 41 is pushed down by human power, and the compression plate 40 moves downward from the upper end portion to compress the coarse dust 4. At that time, since the internal pressure of the space below the compression plate 40 in the dust collection chamber 22 becomes high, the first check valve 50 is closed and no change occurs in the fine dust chamber. However, the second check valve 52 provided on the compression plate 40 is opened so that the air below the compression plate 40 in the dust collecting chamber 22 escapes outside.

Next, when the electric blower before starting cleaning is stopped, as shown in FIG. 8, when the push button 47 is pushed by human power, the latch 45 is lifted by the repelling force of the release spring 42. At the same time, the compression plate 40 moves to the upper end of the dust collection chamber 22. At this time, since the second check valve 52 of the compression plate 40 is closed, the internal pressure below the compression plate 40 in the dust collecting chamber 22 decreases as the compression plate 40 rises. Therefore, the first check valve 50 is opened, and the fine dust 8 in the fine dust chamber 39 enters the dust collecting chamber 22 through the communication port 49 and mixes with the coarse dust 4 in the dust collecting chamber 22 due to the negative pressure.

  Thereby, when the compression plate 40 is lowered, the electric blower is surely stopped, and no airflow is sucked, so that dust does not accumulate on the compression plate 40.

  Therefore, every time cleaning is performed, the compression plate 40 is raised, and the coarse dust 4 and the fine dust 8 are mixed. Therefore, the fine dust 8 is buried in the gap between the coarse dust 4 and compressed. Therefore, when the dust is discarded by opening the lid 34 on a trash can or the like, the coarse dust 4 and the fine dust 8 are compressed together so that they do not fly around and are scattered, and are clean and easy to use. A good vacuum cleaner can be provided.

  Note that the seal member 48 may be a “spa” made of rubber or an O-ring. Also, felt with dense fibers may be used.

  The shape of the dust collecting chamber may not be a cylinder, and even if it is a rectangular parallelepiped, the same operation and effect can be obtained as long as the compression plate and the seal member follow the internal shape of the dust collecting chamber.

  In addition, the inflow port 30 and the outflow port 31 are good also as the same opening part. In this case, for example, the opening may be configured to flow in from the outer periphery of the swirl chamber and flow out from the inner side. In that case, the ventilation grid 33 may be omitted.

  A solenoid valve may be used instead of the check valve. At that time, the solenoid valve may be opened and closed by detecting a positive or negative load applied to the lifting shaft 41 with a sensor or the like.

  In addition, although the structure which raises / lowers the compression plate 40 with human power and the spring 42 was demonstrated, it is not restricted to this, You may comprise using a gearwheel and a motor. For example, the lifting / lowering shaft 41 and the compression plate 40 can be moved up and down by the motor by arranging a rack gear in the longitudinal direction of the lifting / lowering shaft 41 without the spring 42 and meshing with a pinion gear attached to the motor.

  As described above, in the dust collector according to the present invention, the coarse dust 4 and the fine dust 8 are mixed every time the compression plate 40 is raised, so the fine dust 8 is buried in the gap between the coarse dust 4 and compressed. Will be done. Therefore, when the dust is discarded by opening the lid 34 on a trash can or the like, the coarse dust 4 and the fine dust 8 are compressed together so that they do not fly around and are scattered, and are clean and easy to use. Since a good vacuum cleaner can be provided, it can also be applied to a commercial dust collector.

DESCRIPTION OF SYMBOLS 21 Swirling chamber 22 Dust collection chamber 25 Intake port 26 Exhaust pipe 30 Inlet port 35 Transfer path 36 Filter 39 Fine dust chamber 40 Compression plate 41 Lifting shaft (compression plate axis)
48 Sealing member 49 Communication port (first communication part)
50 First check valve 51 Communication port (second communication part)
52 Second check valve

Claims (2)

An electric blower that generates a suction force;
A substantially cylindrical swirl chamber that is installed upstream of the electric blower and swirls air containing dust sucked by the electric blower to separate the dust;
A substantially cylindrical dust collection chamber that is located below the swirl chamber and accumulates dust separated in the swirl chamber;
An air inlet for sucking dust-containing air in the outer circumferential direction of the swirl chamber;
An exhaust pipe that is disposed on the outer peripheral surface near the center of the swirl chamber and exhausts air that has a vent and separates dust;
A filter that is arranged on the leeward side of the exhaust pipe and filters fine dust from air exhausted from the exhaust pipe;
A fine dust chamber disposed below the swirl chamber, an inner space communicating with the inner side of the exhaust pipe, and adjacent to the dust collection chamber;
The swirl chamber and the dust collection chamber are arranged such that the center axes of the swirl chamber and the dust collection chamber are shifted parallel to each other in the horizontal direction and partially overlap in the height direction.
The dust-containing air swirling the swirl chamber has an inflow port through which the dust-containing air flows into the dust collection chamber along the inner wall surface of the swirl chamber outer wall,
An arc-shaped partition wall connected to the inner opening line of the inflow port is provided in the swirl chamber, and a transfer passage is formed between the arc-shaped partition wall and the outer wall of the swirl chamber,
A compression plate for compressing the dust accumulated in the dust collection chamber;
A compression plate shaft for applying pressure to the compression plate;
A seal member disposed so as to fill a gap between the compression plate and the dust collection chamber and to contact an inner wall of the dust collection chamber;
Having a first check valve at a first communication portion between the dust collection chamber and the fine dust chamber at a position lower than the inflow port;
Having a second check valve in a second communicating portion that vertically penetrates the compression plate;
When the compression plate moves from the lower end to the upper end, the first check valve opens due to the negative pressure in the space formed by the dust collection chamber and the lower surface of the compression plate, and air is supplied from the fine dust chamber. Configured to flow to the dust collection chamber,
In addition, when the compression plate moves from the upper end to the lower end, the second check valve opens due to the positive pressure of the space formed by the dust collection chamber and the lower surface of the compression plate, and air flows into the compression plate. A vacuum cleaner configured to flow upward from below. The timing to move the compression plate downward and compress the dust is the timing when the electric blower is stopped during operation,
The electric vacuum cleaner according to claim 1, wherein the timing of moving the compression plate upward to release the dust from the compression is performed when the electric blower is stopped immediately before the cleaning operation.