JP2008207085A - Centrifugal dust collector and vacuum cleaner using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance dust collecting efficiency on a small scale in a centrifugal dust collector. <P>SOLUTION: The centrifugal dust collector is provided with an internal separating chamber 4 centrifugally separating dust by swirling flow, an external separating chamber 31 having the internal separating chamber 4 therein and centrifugally separating dust further by swirling flow from the air exhausting after separating part of dust in the internal separating chamber 4, a sucking opening 2 taking in dust-containing air in a tangential line of the inner wall of the internal separating chamber 4, and a discharge opening discharging exhaust air which keeps part of dust separated away approximately circumferentially along the internal separating chamber 4 toward the external separating chamber 31 direction of the outer wall of the internal separating chamber 4. A dust collecting body 7 having a filter 6 filtering dust is formed in the outer block of the external separating chamber 31. Dust such as cotton dust is separated away by swirling flow generated in the internal separating chamber 4 and collected in a dust collecting chamber, dust such as minute dust which cannot be separated is collected by using swirling flow into the dust collecting body 7 having the filter 6 in the external separating chamber 31, thereby providing the small-sized centrifugal dust collector with excellent dust collecting efficiency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a centrifugal dust collector that separates dust from an air flow containing dust by centrifugal force of a swirling flow and collects only dust.

  Conventionally, this type of centrifugal dust collector is widely used in air cycle systems and cyclone type vacuum cleaners (see, for example, Patent Documents 1 and 2).

  6 and 7 show a conventional centrifugal dust collector described in Patent Document 1. In FIG. As shown in FIGS. 6 and 7, the centrifugal dust collecting device 35 has an intake port 2 for sucking an air flow A containing dust and an inner cylindrical structure along the intake port 2. A separation chamber 4 for centrifuging dust from an air flow in a swirl flow B generated by swirling A, a dust collection chamber 5 for collecting the separated dust, and a separation chamber for separating the air flow D separated from the dust 4 discloses a centrifugal dust collecting device including an exhaust pipe 7 that discharges the centrifugal dust collecting device 35 from the inside through the exhaust port 6 to the outside.

Further, in the above-mentioned Patent Document 2, the straight air flow is converted into the swirl flow by the swirl flow generating blade disposed inside the connection pipe, and fine dust is passed through the opening by the centrifugal force action generated in the swirl flow. There is disclosed a centrifugal dust collector configured to be fed into a dust collecting chamber and further separate fine dust from air by a swirling flow in the dust collecting chamber.
JP 2000-317349 A JP-A-8-322768

  In such a conventional centrifugal dust collector using a cyclone action, the dust to be separated is lifted and discharged when it is affected by the air flow toward the exhaust pipe, and the collection efficiency is deteriorated. It was necessary to increase the length of the centrifugal dust collecting part due to the action, and the equipment was enlarged, and there was a problem in incorporating it into a part with a short height or equipment. In particular, fine dust is likely to rise, so it cannot be separated by the cyclone action, and a part of it is discharged together with the exhaust, so a filter for filtering it is required on the downstream side, the dust collector becomes even larger, and the structure is complicated. Had the problem of becoming.

  The present invention solves the above-mentioned conventional problems, and provides a centrifugal dust collecting device that can be incorporated into a small and compact device without increasing the size of the main body and has a cyclone action with a long-lasting suction performance. Objective.

  In order to solve the above-mentioned conventional problems, the centrifugal dust collector of the present invention has an approximately cylindrical shape and an inner separation chamber that centrifuges dust from swirling air in a swirling flow, and the inner separation chamber inside. And an outer separation chamber for further centrifuging the dust in a swirling flow from the exhaust gas from which part of the dust is separated in the inner separation chamber, and a tangential direction of the inner wall of the inner separation chamber from the outside of the outer separation chamber An air inlet through which dust-containing air flows, and an exhaust port through which the exhaust gas from which a part of the dust is separated in the inner separation chamber is directed to the outer separation chamber and is discharged in a substantially circumferential direction of the outer wall of the inner separation chamber And forming a dust collector having a dust filtering filter on the outer wall of the outer separation chamber.

  As a result, dust such as cotton dust and coarse dust is separated and collected by the swirling flow generated in the inner separation chamber, and fine dust discharged from the inner separation chamber to the outer separation chamber without being completely separated The dust is collected using a swirling flow by a dust filtering filter that forms the outline of the separation chamber.

  The centrifugal dust collector according to the present invention is such that even if the separation chamber that creates the cyclone action is small, the separation dust does not rise easily, and fine dust that has passed through the inner separation chamber is used as a filter (dust collector) that forms the outer separation chamber. Therefore, it is possible to provide a small and simple centrifugal dust collector that has a high dust collection rate and can maintain high suction performance even with a relatively small filter area. it can.

  The first invention has a substantially cylindrical shape and has an inner separation chamber that centrifuges dust from air containing dust in a swirling flow, the inner separation chamber inside, and a part of the dust in the inner separation chamber. An outer separation chamber for further centrifuging dust in a swirling flow from the separated exhaust; an inlet for allowing dust-containing air to flow in from the outside of the outer separation chamber in a tangential direction of the inner wall of the inner separation chamber; and the inner separation A discharge port for exhausting air separated from a part of the dust in the chamber toward the outer separation chamber and discharging the exhaust gas in a substantially circumferential direction of the outer wall of the inner separation chamber. After separating a part of the dust in the inner separation chamber that creates a cyclone action by forming a dust collector having a filter for the inside, the inner separation chamber is formed by the dust collector formed on the outer wall of the outer separation chamber. The exhaust gas that has passed through can be further filtered, so the inner separation chamber Was not completely separated fine dust can be efficiently collected and can sustain a high performance, it is possible to realize a centrifugal force dust collection system for a small and simple configuration.

  In the second invention, the dust collector is formed so that the exhaust discharged from the inner separation chamber toward the outer separation chamber of the first invention flows substantially in parallel with the surface of the filter for dust filtration. Fine dust adhering to the surface of the dust collector can be efficiently collected by the swirling flow created in the outer separation chamber.

  According to a third aspect of the present invention, a fine dust chamber for storing dust captured by the dust collector of the first or second invention is provided close to the dust collection chamber for storing dust captured by the inner separation chamber. By collecting the dust chamber and the dust collection chamber in one place, it is possible to check the amount of accumulated dust and simplify the waste disposal operation.

  The fourth invention is the one in which the fine dust chamber and the dust collection chamber of the third invention are provided with an opening / closing lid that opens simultaneously, and the adjacent fine dust chamber and the dust collection chamber are disposed at the time of garbage disposal. Since it can be opened at the same time, the waste disposal work becomes easy.

  According to a fifth aspect of the present invention, the dust collector of any one of the first to fourth aspects is formed by forming a flow passage that generates a swirling flow in a part thereof, thereby effectively utilizing the area of the dust collector. The dust can be efficiently collected by the swirl flow.

  6th invention provides the filter medium which filters coarse dust in the discharge port of any one invention of 1st-5th, and swirls a part of air flow in an inner side separation chamber, and thereby cotton waste It is possible to increase the collection efficiency with low pressure loss, for example, by swirling coarse dust and fine dust, etc., and collecting fine dust with the swirling coarse dust.

  The seventh invention is a vacuum cleaner using the centrifugal dust collector of any one of the first to sixth inventions, and provides a cyclone type vacuum cleaner that maintains excellent suction performance. It becomes possible.

  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)
1 to 5 show a centrifugal dust collector in a first embodiment of the present invention.

  1 to 5, the centrifugal dust collector 1 is arranged above the centrifugal dust collector 1 so that an air flow A containing dust flows in the tangential direction into the centrifugal dust collector 1 to generate a swirling flow B. A suction port 2 to be generated, a substantially cylindrical inner separation chamber 4 that centrifuges dust from an air flow (dust-containing air) containing dust in a swirling flow B, and a dust collection chamber 5 that collects the separated dust. The inner separation chamber 4 is provided inside, and a swirl flow is generated in the same manner as described above, and a part of the dust is separated in the inner separation chamber 4 and dust is removed from the exhaust gas flowing through the inner separation chamber 4. An outer separation chamber 31 that centrifuges and a dust collector 7 that forms a part of the outer shell of the outer separation chamber 31, and the dust collector 7 filters dust (for example, coarse dust, fine dust, etc.). The filter 6 is formed.

  Here, the upper part of the dust collector 7 that forms the outline of the outer separation chamber 31 is integrally joined to the upper part by a top plate 8, and a small filter 9 is also provided on a part of the top plate.

  A fine dust chamber 10 for collecting dust (for example, coarse dust, fine dust, etc.) is formed in the lower part of the dust collector 7, and the fine dust chamber 10 and the dust collection chamber 5 below the inner separation chamber 4 are defined as follows. They are joined together.

  Reference numeral 11 denotes an opening / closing lid that opens and closes the fine dust chamber 10 and the dust collecting chamber 5 at the same time, and is locked by a hook 12.

  A tight packing 13 is attached to the lower ends of the fine dust chamber 10 and the dust collecting chamber 5 that are in contact with the open / close lid 11.

  The intake port 2 is provided so as to penetrate the dust collector 7 that forms the outline of the outer separation chamber 31 and the inner separation chamber 4, and the dust collector 7 and the separation chamber 4 are also disposed around the intake port 2. An air passage (gap) is provided between them. Reference numeral 14 denotes a hinge of the opening / closing lid 11. Reference numeral 15 denotes a frame that supports the dust collector 7 and has a plurality of openings 16 that are joined to the top plate 8 and the fine dust chamber 10 to ensure the rigidity of the entire dust collector. A plurality of vortex chambers 17 bent in a spiral shape are formed in the dust collector 7, and a swirl flow C is generated in the vortex chamber 17 to separate fine dust.

  Next, the flow of airflow and the like in the present embodiment will be described.

  The centrifugal dust collector 1 is installed in the dust collector loading chamber 19 of the vacuum cleaner, and the suction force of the fan motor 20 is uniformly applied to the centrifugal dust collector 1, so that dust-containing air is generated from the intake port 2. Enter the separation chamber 4 tangentially. Reference numeral 3 denotes a circular packing that tights the intake port 2 and the dust collector charging chamber 19.

  The separation chamber 4 is provided with a discharge port 23 to which a pre-filter 18 formed of a net-like filter medium is attached so that the opening area gradually increases as it descends from the upper part to the lower part. The prefilter 18 captures coarse dust such as cotton dust. Since the mesh of the prefilter 18 is rough but not completely open, a part of the air in the inner separation chamber 4 is in the inner separation chamber 4. It is discharged into the outer separation chamber 31 that is outside, and a part thereof becomes a swirl flow B in the inner separation chamber 4. Since the swirl flow B is generated inside the inner separation chamber 4, the discharged air flow also flows along the swirl flow B, and is discharged in the circumferential direction (circular tangential direction) of the inner separation chamber 4. Since the circumferential surface of the inner separation chamber 4 is formed by the dust collector 7, the airflow discharged in the circumferential direction is the surface of the filter 6 along the filter 6 surface of the dust collector 7 formed in a substantially arc shape. And a swirl flow D along the shape of the dust collector 7, and acts to separate the air current and dust such as fine dust.

  In the inner separation chamber 4, the air current and the dust are separated while the suction air including the dust is rotated by the swirling flow, and the dust is collected in the dust collection chamber 5. Since the opening area of the discharge port 23 is smaller toward the upper part of the inner separation chamber 4, more airflow swirls in the upper part, and the swirl flow decreases as it goes downward, and the airflow discharged outside the inner separation chamber 4 increases. Therefore, even if the height of the inner separation chamber 4 is made lower than that of the conventional one, the dust that has fallen into the lower dust collection chamber 5 hardly rises and accumulates in the dust collection chamber 5. Further, the cotton dust separated by the swirling flow is solidified while swirling, and rotates while cleaning the surface of the pre-filter 18. At that time, a part of the fine dust that tries to pass through the pre-filter 18 adheres to the cotton dust and is collected, so that even if the pre-filter 18 is composed of a low-pressure loss coarse filter medium, it is difficult to clog. And high collection performance can be obtained.

  The air that has entered the outer separation chamber 31 swirls along the filter 6, but is discharged from the exhaust port chamber 23 into a space having a large flow path area, so that the flow velocity decreases and dust such as fine dust easily falls. , Separation action of airflow from the swirling flow and dust such as fine dust is promoted.

  Since the airflow containing dust such as fine dust collides with the eyes of the filter 6 in a substantially parallel direction, the eyes of the filter are apparently narrower than when colliding with the airflow perpendicular to the surface of the filter 6, Even if the filter has a slightly larger eye and relatively less pressure loss, dust such as fine dust can be collected with high efficiency.

  Further, it is difficult for fine dust to get into the depths of the eyes of the filter 6, and dust, such as fine dust that adheres, is easily dropped by the dust removal operation such as vibration, and the performance is easily recovered. Since there is little pressure loss and clogging can be reduced, even if the area of the filter 6 is made smaller than the filter area of the conventional mechanism, the suction performance and the durability of the performance can be ensured, so the dust collector 7 itself can be made smaller. Become.

  Clean air in which dust such as fine dust is collected is discharged from the opening 16 of the frame body 15, sucked by the fan motor 20, and then discharged outside the cleaner. Normally, when the filter 6 receives a suction force, it spreads outside, but the outer periphery is held by the frame 15, so it does not spread, and the distance from the inner wall of the dust collector storage chamber 19 of the vacuum cleaner is kept constant, An air passage is always secured. Further, since the dust collecting body 7 is stretched around the separation chamber 4 so that a large area can be secured, the filter 6 does not need to be pleated and can be configured in a substantially planar shape, so that it adheres during dust removal. Garbage easily falls.

  In the present embodiment, the vibrating body 21 that vibrates the centrifugal dust collector 1 is driven once every time the cleaner is operated, and dust such as dust and fine dust attached to the pre-filter 18 and the filter 6 is dropped by vibration. Therefore, the surface can always maintain the almost initial state.

  The swirl flow inside the outer separation chamber 31 generates not only swirl flow D but also swirl flow C by sucking the air of the spiral shaft portion of the swirl chamber 17 from the small filter 9. It enhances the ability to separate and collect dust, makes effective use of the filter area, and secures a space where a cleaning brush can be inserted.

  Dust such as collected dust and fine dust is collected by opening the lid 22 of the dust collector storage chamber 19 and taking out the centrifugal dust collector 1, releasing the hook 12 and opening the open / close lid 11. 5 and the dust in the fine dust chamber 10 can be discarded at the same time, and can be easily discarded.

  As described above, in the present embodiment, the inside of the outer separation chamber 31 in which the dust collector 7 formed by the filter 6 having a relatively small area without pleating is formed in the outer shell is centrifuged in a swirling flow. By storing the separation chamber 4, the centrifugal dust collector 1 itself can be made compact, and in the inner separation chamber 4, coarse dust such as cotton dust and a part of fine dust can be removed by the dust collector 7. Therefore, it is possible to provide an easy-to-use centrifugal dust collecting device 1 that can capture the dust using a swirling flow and maintains excellent suction performance.

  In the present embodiment, the case where the centrifugal dust collecting device is installed in the canister type vacuum cleaner has been described. However, the same effect can be obtained even when the centrifugal dust collecting device is installed in the upright type vacuum cleaner. It is.

  As described above, the centrifugal dust collector according to the present invention realizes excellent suction performance while being small, and can be used to improve the performance and usability of the cyclone vacuum cleaner. .

Plan sectional drawing of the centrifugal dust collector in Embodiment 1 of this invention Vertical section of the centrifugal dust collector Perspective view of the centrifugal dust collector Exploded perspective view of inner separation chamber and dust collector of the centrifugal dust collector Partial sectional view of the filter of the centrifugal dust collector Vertical section of a conventional centrifugal dust collector Top view of the centrifugal dust collector

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Centrifugal dust collector 2 Intake port 3 Circular packing 4 Inner separation chamber 5 Dust collection chamber 6 Filter 7 Dust collector 8 Top plate 9 Small filter 10 Fine dust chamber 11 Opening lid 12 Hook 13 Packing 14 Hinge 15 Frame 16 Opening 17 Vortex chamber 18 Prefilter 19 Dust collector storage chamber 20 Fan motor 21 Vibrating body 22 Lid body 23 Discharge port 31 Outer separation chamber

Claims (7)

An inner separation chamber that has a substantially cylindrical shape and centrifugally separates dust from the dust-containing air in a swirling flow, and has the inner separation chamber inside, and an exhaust gas in which a part of the dust is separated in the inner separation chamber, An outer separation chamber for further centrifuging dust in a swirling flow, an intake port for allowing dust-containing air to flow in the tangential direction of the inner wall of the inner separation chamber from the outside of the outer separation chamber, and dust in the inner separation chamber A discharge port for discharging the exhaust gas separated into the outer separation chamber toward the outer separation chamber in a substantially circumferential direction of the outer wall of the inner separation chamber, and having a dust filtering filter on the outer shell of the outer separation chamber. A centrifugal dust collector that forms a dust body. The centrifugal dust collector according to claim 1, wherein the dust collector is formed so that the exhaust gas discharged from the inner separation chamber toward the outer separation chamber flows substantially in parallel with the surface of the filter for dust filtration. The centrifugal dust collector according to claim 1 or 2, wherein the fine dust chamber for storing the dust captured by the dust collector is provided close to the dust collection chamber for storing the dust captured by the inner separation chamber. The centrifugal dust collector according to claim 3, further comprising an opening / closing lid that opens the fine dust chamber and the dust collection chamber simultaneously. The centrifugal dust collector according to any one of claims 1 to 4, wherein a flow path for generating a swirling flow is formed in a part of the dust collector. The centrifugal dust collector according to any one of claims 1 to 5, wherein a filter medium for filtering coarse dust is provided at the discharge port. The vacuum cleaner using the centrifugal dust collector of any one of Claims 1-6.

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