JP2013132339A - Dust collecting device of vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain high dust separation collection performance for a long period by reducing sticking to a secondary side filter of fine dust that has passed a centrifugal separation means on a primary side, reducing clogging of the secondary side filter, and thereby preventing air flow from lowering.SOLUTION: A dust collecting device of a vacuum cleaner includes: a centrifugal separation section centrifugally separating dust from sucked air and disposed with a primary filter 12 for passing the air after the separation; a secondary filter 20 for separating fine dust passed the primary filter 12 from the air; a diagonal hole 24 formed in the secondary filter 20 and converting the direction of the air flow passed the primary filter 12 to the centrifugal direction; a dust storage chamber 21 for storing the dust centrifugally separated in the centrifugal separation section; and a fine dust storage chamber 13 for storing the fine dust separated by the secondary filter 20.

Description

  The present invention relates to a vacuum cleaner, and more particularly to a dust collector of a vacuum cleaner.

  There is known a dust collector of a vacuum cleaner having a primary side centrifugal separating means using centrifugal separation and a secondary side separating means such as a filter for collecting fine dust passing through the primary side separating means (for example, Patent Document 1).

JP 2010-268876 A

  The above-mentioned Patent Document 1 uses a filter as a secondary side separating means, and the secondary side filter employs a fine filter such as a HEPA filter in order to collect fine dust. It had the subject that it adhered and was easy to be clogged and the passing air volume was easy to fall.

  In order to solve the problem, a mechanism for removing dust from the secondary side filter by applying mechanical vibration to the secondary side filter after stopping the suction is provided so as to prevent clogging of the secondary side filter. In patent document 1, it is comprised so that the dust adhering to a secondary side filter may be removed by the vibration produced by moving the jog lever provided in the secondary side filter on the rail-shaped holder which fixes a jog lever. However, there are problems that the user has to operate the jogin lever, which is not easy to use, and the dust removal mechanism is complicated and the product shape becomes large.

  The present invention solves the above-described problems of the prior art, and reduces the amount of fine dust that has passed through the primary-side centrifugal separation means adhering to the secondary-side filter, thereby reducing clogging of the secondary-side filter. An object of the present invention is to provide a dust collecting device for an electric vacuum cleaner capable of preventing a decrease in air volume.

  The dust collector of the vacuum cleaner according to the present invention includes a centrifugal separation unit provided with a primary filter that centrifuges dust from suction air and passes the separated air, and separates fine dust that has passed through the primary filter from the air. A secondary filter, an airflow direction control unit that is formed in the secondary filter and controls the direction of the airflow that has passed through the primary filter, and a dust storage chamber that stores the dust that has been centrifuged by the centrifugal separator And a fine dust storage chamber for storing fine dust separated by the air flow direction control means, and fine dust that has passed through the centrifugal separator is separated and collected by a secondary filter, or separately provided. It assists the collection effect of the means.

  Specifically, when a secondary filter is arranged upstream of a fine dust separating means such as a fine dust filter formed from a filter medium or the like arranged on the most downstream side of the centrifugal separator, and the air flow enters the secondary filter. By restricting the direction of the airflow and separating fine dust contained in the airflow from the airflow, the amount of trapped particles in the fine dust filter is reduced and the performance is maintained.

According to the present invention, the fine dust that has passed through the centrifugal separator is separated and collected from the air flow by the secondary filter, and the fine dust to the fine dust separating means such as the fine dust filter disposed downstream of the secondary filter is collected. Since reduction of adhesion can be realized, excellent dust collection performance can be exhibited, and the performance can be maintained for a long time. Moreover, since it is not necessary to add a drive source and can be configured in a small size, a compact, high-performance and highly durable dust collector that is easy to use and a vacuum cleaner equipped with the dust collector are provided. Can do.

Configuration exploded view of the dust collector in Embodiment 1 of the present invention The perspective view which fractured a part of the dust collector Side sectional view of the dust collector (A) AA plane sectional view of FIG. 3 of the dust collecting apparatus (b) X partial enlarged view of the dust collecting apparatus The enlarged plan view which looked at the oblique hole of the dust collector from the direction C in FIG. (A) BB plane sectional view of FIG. 3 of the dust collector (b) Z partial enlarged view (c) DD sectional view The enlarged plan view which looked at the diagonal hole of the dust collector in Embodiment 2 of this invention from the C direction of FIG. (A) BB plane sectional view of dust collector in Embodiment 2 of the present invention (b) V partial enlarged view (A) AA plane sectional view of a dust collector in Embodiment 3 of the present invention (b) Y partial enlarged sectional view Schematic sectional view of a vacuum cleaner body in an embodiment of the present invention

  The first invention is a centrifugal separation unit provided with a primary filter for centrifuging dust from suction air and passing the separated air; a secondary filter for separating fine dust that has passed through the primary filter from air; Airflow direction control means for controlling the direction of airflow that has passed through the primary filter, formed in the secondary filter, a dust storage chamber for storing dust that has been centrifuged by the centrifugal separator, and the airflow direction control And a fine dust storage chamber for storing fine dust separated by means, and the inertia acting on the fine dust when the fine dust contained in the air flow that has passed through the primary filter enters the secondary filter. By controlling the air flow direction so as to be separated from the air flow by force, fine dust is separated and collected from the air flow, and the collection rate of fine dust is increased.

  According to a second aspect of the present invention, the airflow direction control means formed on the secondary filter is configured to convert the direction of the airflow that has passed through the secondary filter to the centrifugal direction. It improves collection efficiency.

  According to a third aspect of the present invention, the primary filter is provided with airflow direction control means for changing the swirl direction of the airflow upstream and downstream of the centrifugal separator. When the airflow enters the primary filter, The air flow direction is controlled so that fine dust is separated from the air flow by the inertial force acting on the fine dust with respect to the direction of the swirling flow in the separation unit, and the collection efficiency of the primary filter is improved.

  According to a fourth aspect of the present invention, the airflow direction control means formed on the primary filter is configured to convert the turning direction to the reverse direction on the upstream side and the downstream side of the primary filter, and converts the turning direction to the reverse direction. This improves the collection efficiency of the primary filter.

  5th invention sets the average particle diameter of the fine dust which can be collected with the said secondary filter smaller than the average particle diameter of the fine dust which can be collected with the said primary filter, The fine dust which passed the primary filter is set. The collection efficiency in the secondary filter is improved.

A sixth aspect of the present invention is an electric vacuum cleaner equipped with the dust collector of any of the first to fifth aspects of the present invention, and is an excellent vacuum cleaner that can maintain high dust separation performance for a long time and is small and easy to use. It can be provided.

(Embodiment 1)
FIG. 10 is a side sectional view of the electric vacuum cleaner according to the embodiment of the present invention.

  In FIG. 10, the vacuum cleaner main body 110 is provided with a dust collector storage portion 115 for storing the dust collector 111 and an electric blower chamber 113 for storing the electric blower 112 at the front and rear.

  A hose is connected to the hose connection port 119 of the dust collector housing 115, an extension pipe is connected to the tip of the hose, and a floor suction tool is connected to the tip of the extension pipe (both not shown). ).

  The downstream side of the dust collector housing 115 is connected to the electric blower chamber 113, and the suction pressure of the electric blower 112 is applied to the dust collector 111.

  Hereinafter, the configuration and operation of the dust collector 111 will be described in detail.

  1 is an exploded perspective view of a dust collecting device 111 according to an embodiment of the present invention, FIG. 2 is a perspective view in which a part of the dust collecting device 111 is broken, and FIG. 3 is a sectional view of the dust collecting device 111. Although the main body 110 is omitted, the airflow inside the dust collector 111 represents a state when the vacuum cleaner main body 110 is mounted and operated.

  1 to 3, the dust collector 111 is disposed concentrically with the outer shell cylindrical portion 11 in the outer shell cylindrical portion 11 having the suction port 16 communicating with the hose connection port 119. A cylindrical primary filter 12, a storage unit 14 that is provided above the primary filter 12 and supports the primary filter 12, a secondary filter 20 that forms the bottom surface of the storage unit 14, and a storage unit 14. A tertiary filter 15 formed of a filter medium or the like, a fine dust storage chamber 13 that is disposed below the primary filter 12 and accumulates fine dust collected by the secondary filter 20, covers the storage portion 14, and communicates with the electric blower chamber 113. It has a lid 18 having a communication port 17 and a bottom lid 19 that covers the lower surface opening of the outer shell cylindrical portion 11 so as to be freely opened and closed. The primary filter 12, the fine dust storage chamber 13 and the storage portion 14 constitute an inner cylinder 120. On the downstream side of the dust collector 111, the suction pressure of the electric blower 112 is applied to the dust collector 111 so as to communicate with the electric blower chamber 113 of the main body of the vacuum cleaner.

  In the dust collector 111, a centrifugal separator is formed between the outer shell cylindrical part 11 and the primary filter 12, and suction air 31 containing dust sucked from the suction port 16 swirls around the centrifugal separator. The dust is separated from the suction air 31 by centrifugal force, and the separated dust accumulates in the dust storage chamber 21 at the bottom of the centrifugal separation portion while turning by the action of inertia force and own weight.

  As shown in FIG. 4, the primary filter 12 has an infinite number of oblique holes 23, and the inclination α of the oblique holes 23 is the swirling direction of the suction air 31 that flows through the centrifugal separator outside the primary filter 12 ( In FIG. 4 (a), it is set in the opposite direction (counterclockwise when viewed from the top), and the suction air 32 that has passed through the oblique hole 23 is within the primary filter 12, It is configured to swirl in the opposite direction (clockwise as viewed from the top) with respect to the swirling direction of the suction air 31 flowing through the centrifugal separator (counterclockwise as viewed from the top in FIG. 4A). In the present embodiment, the airflow direction control means is constituted by the oblique holes 23.

The slant hole 23 of the primary filter 12 is formed to be inclined in the direction opposite to the swirl direction of the suction air 31 swirling in the centrifugal separator, and therefore, in order for dust to pass through the slant hole 23, inertial force is applied. On the other hand, it must be reversed approximately 108 degrees. However, since the flow velocity of the swirling flow in the centrifugal separator is high, most of the dust cannot pass through the oblique holes 23 and is centrifuged in the centrifugal separator and collected in the dust storage chamber 21.

  The suction air 32 that has passed through the primary filter 12 swirls in the direction opposite to the swirling direction in the centrifugal separator inside the primary filter 12, and the fine fine dust contained in the suction air 32 is centrifuged and centrifuged. The fine dust is accumulated in the fine dust storage chamber 13, and the air flows toward the secondary filter 20.

  As shown in FIG. 6, the secondary filter 20 has an infinite number of oblique holes 24. The slant hole 24 of the secondary filter 20 is set to have a smaller passage cross-sectional area than the slant hole 23 of the primary filter 12 and is formed so that dust is more difficult to pass through.

  The inclination λ of the slant hole 24 of the secondary filter 20 is opposite to the swirl direction of the air flow 32 flowing in the upstream side of the secondary filter 20 (clockwise as viewed from the top in FIG. 6). The suction air that has passed through the oblique hole 24 is set in the counterclockwise direction (counterclockwise as viewed from the top in FIG. 6A) in the primary filter 12 (from the top). It is configured to turn clockwise as viewed. In the present embodiment, the airflow direction control means is constituted by the oblique holes 24.

  Since the slant hole 24 of the secondary filter 20 is formed so as to be inclined in the direction opposite to the swirl direction of the air 32 swirling inside the primary filter 12, as with the slant hole 23 of the primary filter 12, Block the passage. Further, the oblique hole 24 has a small passage cross-sectional area, further preventing fine dust from passing through the oblique hole 24. Thereby, the average particle diameter of the fine dust which can be collected with a secondary filter becomes smaller than the average particle diameter of the fine dust which can be collected with a primary filter.

  The air that has passed through the secondary filter 20 is filtered by the tertiary filter 15 formed of a filter medium or the like, and only clean air passes through. The passed clean air passes through the communication port 17 provided downstream of the tertiary filter 15, becomes clean air 35, and reaches the intake passage 133 disposed at the rear portion of the dust collector 111.

  The operation in the embodiment of the present invention will be described below.

  When the vacuum cleaner body 110 is driven, the electric blower 112 generates suction pressure, and the air containing dust sucked from the floor suction tool passes through the extension pipe and the hose, and passes through the hose connection port 119 to the dust collector 111. Led.

  The suctioned air that has entered the dust collector 111 from the suction port 16 centrifuges the dust in the centrifugal separation part on the outer periphery of the primary filter 12, and the separated dust is accumulated in the dust storage chamber 21.

  In the present embodiment, since the oblique hole 23 of the primary filter 12 of the centrifugal separator is inclined in the opposite direction to the suction air 31 swirling outside the primary filter 12, dust passes through the oblique hole 23. Must reverse approximately 180 degrees against the inertial force, but because the swirl flow rate is high, most of the dust cannot pass through the oblique holes 23 and is separated from the air flow and is stored in the dust storage chamber 21. To be collected.

  The air that has passed through the primary filter 12 reverses the turning direction by passing through the oblique hole 23, and the fine dust contained in the air is again pushed to the inner peripheral surface side of the primary filter 12 by centrifugal force. 12 and falls into the fine dust storage chamber 13.

  The air 32 swirling inside the primary filter 12 flows toward the secondary filter 20.

Since the oblique hole 24 of the secondary filter 20 is inclined in the opposite direction to the swirl flow inside the secondary filter 20, in order for dust to pass through the oblique hole 24, it must be reversed by approximately 180 degrees against the inertial force. Most of the dust is separated from the air flow without passing through the oblique holes 24 and collected in the fine dust storage chamber 13.

  Further, the oblique hole 24 of the secondary filter 20 is set to have a smaller passage cross-sectional area than the oblique hole 23 of the primary filter 12 in order to make it difficult for fine dust passing through the oblique hole 23 of the primary filter 12 to pass. Therefore, it is easy to separate fine dust from the air flow 32.

  The air that has passed through the secondary filter 20 is filtered by the tertiary filter 15 to become clean air, and is sucked into the electric blower 112 from the communication port 17.

  In the first embodiment described above, the oblique holes 23 of the primary filter 12 are formed in a substantially horizontal direction as shown in FIG. 5, but as in the second embodiment shown in FIG. It is preferable to incline β so that the air that has passed through the oblique holes 23 flows toward the fine dust storage chamber 13 with respect to the horizontal.

  According to the configuration of FIG. 7, since the air flow 32 that has passed through the oblique hole 23 of the primary filter 12 becomes a swirl flow toward the fine dust storage chamber 13, the fine dust that has passed through the primary filter 12 is generated by the oblique hole 23. The fine dust which is sent to the fine dust storage chamber 13 side by the swirl flow and easily accumulates in the fine dust storage chamber 13 can be reduced.

  Further, as shown in FIG. 6, the oblique holes 24 of the secondary filter 20 are formed substantially parallel to the swirling direction of the swirling flow inside the primary filter 12, but as in the second embodiment shown in FIG. It is preferable to provide an angle γ with respect to the circumferential tangent so that an air flow 33 in which the air that has passed through the oblique holes 24 heads in the outer circumferential direction is generated.

  According to the configuration of the slanted hole 24 shown in FIG. 8B, by providing an angle of γ with respect to the circumferential tangent line, the ultrafine dust that has passed through the slanted hole 24 is subjected to centrifugal force and stalls. The amount of ultrafine dust that can be deposited on the downstream side of the filter 20 and carried to the tertiary filter 15 by the airflow 33 can be reduced.

  Further, in the above-described embodiment, the oblique holes 23 of the primary filter 12 are formed in a straight line as shown in FIG. 4, but in a substantially S shape as in the third embodiment shown in FIG. It may be formed. If it is this structure, since a flow path will become complicated, passage of fine dust can be prevented.

  Ultrafine dust that has passed through the secondary filter 20 and could not be deposited on the downstream side surface of the secondary filter 20 by the centrifugal force generated by the oblique holes 24 is finally collected by the tertiary filter 15.

  By these series of actions, fine dust adhering to the tertiary filter 15 is greatly reduced, and clogging of the tertiary filter 15 is remarkably reduced.

  In the present embodiment, the air flow direction is controlled in a space-saving manner by forming the oblique holes 23 as the air flow control means in the primary filter 12, but the primary filter 12 is disposed downstream of the primary filter 12. A plurality of inclined ribs may be formed so as to control the direction of the airflow that has passed through, and other configurations may be used as long as the direction of the airflow in the centrifugal separator is changed.

In the present embodiment, the primary filter 12 and the secondary filter 20 are made of metal, and the oblique holes 23 and 24 are formed by etching, but the oblique holes 23 and 24 to the primary filter 12 and the secondary filter 20 are formed. The processing technique is not limited in the present invention, and a well-known technique can be adopted.

  As described above, the dust collector of the electric vacuum cleaner of the present invention can maintain a high suction airflow for a long period of time and maintain a high collection performance without providing a dust removal mechanism.

  As described above, according to the embodiment of the present invention, an easy-to-use vacuum cleaner including a dust collector that can maintain high dust separation performance and suction performance over a long period of time without supplying a dust removal mechanism is provided. be able to.

  The field of application of the present invention is not particularly limited, and can be widely used as a vacuum cleaner.

DESCRIPTION OF SYMBOLS 12 Primary filter 13 Fine dust storage chamber 15 Tertiary filter 16 Suction port 19 Bottom cover 20 Secondary filter 21 Dust storage chamber 23 Diagonal hole 24 Diagonal hole 110 Vacuum cleaner main body 111 Dust collector 112 Electric blower 115 Dust collector storage part

Claims (6)

Formed in the secondary filter, a centrifuge section that has a primary filter that centrifuges dust from suction air and passes the separated air, a secondary filter that separates fine dust that has passed through the primary filter from the air, and the secondary filter The air flow direction control means for controlling the direction of the air flow that has passed through the primary filter, the dust storage chamber for storing the dust centrifugally separated by the centrifugal separator, and the fine air flow separated by the air flow direction control means. A dust collector for a vacuum cleaner, comprising: a fine dust storage chamber for storing dust. 2. The dust collector of an electric vacuum cleaner according to claim 1, wherein the airflow direction control means formed on the secondary filter is configured to convert the direction of the airflow that has passed through the secondary filter to a centrifugal direction. 3. . The dust collecting device for an electric vacuum cleaner according to claim 1 or 2, wherein air flow direction control means for converting a swirl direction of the air flow upstream and downstream of the centrifugal separator is formed in the primary filter. The dust collecting device for an electric vacuum cleaner according to claim 3, wherein the airflow direction control means formed on the primary filter is configured to convert the turning direction to the reverse direction between the upstream side and the downstream side of the primary filter. apparatus. The average particle diameter of fine dust that can be collected by the secondary filter is set smaller than the average particle diameter of fine dust that can be collected by the primary filter. Vacuum cleaner dust collector. The vacuum cleaner carrying the dust collector as described in any one of Claims 1-5.