JP2008173265A - Dust bag and vacuum cleaner - Google Patents

Abstract

The present invention provides a dust collection bag in which a suction force of an electric blower is prevented from decreasing with time.
SOLUTION: A filter medium 31 located on the innermost side of a bag body 22 includes a downstream portion 35 located on the electric blower 6 side, and an upstream portion 36 located on the opening 33 side and having higher air permeability than the downstream portion 35. Form. When the dust sucked by the drive of the electric blower 6 adheres to the downstream portion 35, the suction air is released from the upstream portion 36 having a higher air permeability than the downstream portion 35, so that the suction force of the electric blower 6 can be maintained.
[Selection] Figure 1

Description

  The present invention relates to a dust collection bag for collecting dust sucked by driving of an electric blower housed in a vacuum cleaner body, and a vacuum cleaner including the dust collection bag.

Conventionally, this type of dust bag is provided with a vacuum cleaner body that houses an electric blower. The vacuum cleaner body is provided with a dust collection chamber communicating with the suction side of the electric blower, and a main body suction port is formed at the front of the vacuum cleaner body on the upstream side of the dust collection chamber. A hose body, an extension pipe, and a floor brush are sequentially connected to the main body suction port. For example, a disposable dust bag is detachably provided in the dust chamber. This dust collection bag is configured by laminating a plurality of layers of breathable materials (for example, see Patent Document 1).
Japanese Patent Laying-Open No. 2001-204661 (page 4-5, FIG. 4)

  However, in the dust bag described above, the fineness of the breathable material is uniform throughout, and clogging occurs when the sucked dust adheres to the breathable material, reducing the suction force of the electric blower Have the problem of

  This invention is made | formed in view of such a point, and it aims at providing the dust collection bag which suppressed the time-dependent fall of the suction force of an electric blower, and a vacuum cleaner provided with the same.

  The present invention is an electric blower in which a breathable material that is formed in a bag shape having an opening portion by a plurality of laminated breathable materials and that is located on the innermost side of a bag body that collects dust introduced from the opening portion It has a downstream portion located on the side and an upstream portion located on the opening side and having higher air permeability than the downstream portion.

  According to the present invention, when dust sucked by the drive of the electric blower adheres to the downstream portion, the suction air is removed from the upstream portion located on the opening side and having higher air permeability than the downstream portion. The suction power can be maintained.

  Hereinafter, the structure of the vacuum cleaner of the 1st Embodiment of this invention is demonstrated with reference to FIG.

  1 to 3, reference numeral 1 denotes a vacuum cleaner main body, and the vacuum cleaner main body 1 is a so-called canister-type electric vacuum cleaner that can run on a floor surface. The vacuum cleaner main body 1 includes a lower case 2, a bumper 3 attached to the outer periphery of the lower case 2, and the bumper 3 sandwiched between the lower case 2 and the rear side pivoting to the lower case 2. A main body case 5 having a lid case 4 connected to the electric fan 6 is provided. In the main body case 5, an electric blower chamber (not shown) in which the electric blower 6 is accommodated is defined on the rear side. A dust collection chamber 9, in which a dust collection bag 8 as a dust collection unit is detachable and whose upper side is opened and closed by the rotation of the lid case 4, is defined on the front side.

  Further, a hose connection port 11 serving as a main body suction port communicating with the dust collecting chamber 9 is formed in the lower part on the front side in the main body case 5, and the hose connection port 11 has a communication pipe 12 a on the base end side. Dust collection hose 12, extension tube 14 detachably connected to hand control tube 13 provided at the upstream end of dust collection hose 12, and suction port detachably connected to the tip of extension tube 14 The bodies 15 are sequentially connected in communication. Further, the operation tube 16 is provided on the hand operation tube 13, and the operation device 16 is provided with a plurality of operation switches 17 for setting the operation mode of the electric blower 6.

  The dust collection bag 8 is a disposable one such as a paper pack filter or a cloth pack filter, for example, and as shown in FIG. And a bag body 22 that is a filter medium.

  The mouth frame 21 is fitted and fixed to a body clamp (not shown) provided at the top of the hose connection port 11 at the front of the dust collection chamber 9 when the dust collection bag 8 is attached to the dust collection chamber 9. For example, it is formed in a quadrangular shape using a thick paper such as cardboard, and a suction opening 26 is formed in the central portion and is integrally bonded to the bag body 22. A valve body 28 into which the communication pipe 12a of the dust collecting hose 12 inserted into the hose connection port 11 is inserted in an airtight manner is provided at the peripheral edge on the downstream side of the suction opening 26. The valve body 28 is formed in an annular shape having an inner diameter smaller than the outer diameter of the communication pipe 12a of the dust collecting hose 12 by a flexible member, and the communication pipe 12a is inserted therein, thereby The communication pipe 12a and the bag body 22 are configured to be hermetically connected by being flexibly deformed inward of the bag body 22 in a state where the inner peripheral side is in close contact with the outer periphery of the pipe 12a.

  The bag body 22 is formed in a bag shape having an opening 33 by a sheet formed by laminating a plurality of, for example, two filter media 31 and 32 as air permeable materials, spaced apart at a predetermined interval. . And this bag body 22 is folded in the state before use, and when the air blower 6 is driven, the air blows into the rear, and the bag 22 is included in the air intake when it passes. Dust adheres to it.

  The filter medium 31 is located on the innermost side of the bag body 22, and is open to the downstream portion 35 located on the electric blower 6 side, that is, the rear side, facing the communication pipe 12 a and the front end portion of the downstream portion 35. And an upstream portion 36 located on the portion 33 side.

  The downstream portion 35 is a paper-like portion constituting the entire rear side of the filter medium 31, is formed in a bag shape, and the front end portion is the rear end portion of the communication pipe 12 a with the dust bag 8 attached to the dust collection chamber 9. The front end portion is located in the vicinity of the downstream end portion.

  The upstream portion 36 is formed in a cylindrical shape and connected to the rear end downstream portion 35, and the front end is fixed to the peripheral edge of the suction opening 26 of the mouth frame 21. The upstream portion 36 is a net portion made of a member having a larger air permeability than the downstream portion 35, that is, having a coarse mesh. The dust collection bag 8 is attached to the dust collection chamber 9 and the communication pipe 12 a is attached to the upstream portion 36. It is located opposite to the surroundings.

  The filter medium 32 is located on the outermost side of the bag body 22 and is a paper-like part formed by a member having a finer mesh than the downstream part 35 of the filter medium 31. The suction opening 26 of the frame 21 is fixed to the peripheral edge.

  Here, the filter medium 32 is laminated at a relatively narrow predetermined interval in the downstream part facing the downstream part 35, and the upstream part facing the upstream part 36 which is the attachment position on the opening 33 side of the filter medium 31 In FIG. 2, the gaps are stacked at a wider interval than the predetermined interval with the downstream portion 35 and attached to the mouth frame 21.

  Therefore, the filter medium 32 has the opening 33 side fixed in the vicinity of the peripheral edge of the mouth frame 21, and the filter mediums 31 and 32 have a gap narrowing from the front end portion to the rear end side of the downstream portion 35 of the filter medium 31. Are stacked.

  In addition, when the filter medium 32 is used as an auxiliary to the filter medium 31, when the dust is passed through the filter medium 31 by actively setting the eyes at the downstream portion 35 or more of the filter medium 31 and actively collecting the dust. It is preferable to set the eyes finely in the downstream portion 35 or more.

  On the other hand, the communication pipe 12a has a downstream end portion that is linearly inserted into the opening 33 in the bag body 22 along the front-rear direction of the main body case 5, and at the inserted position and along the outer periphery. A plurality of lateral holes 38 are formed in the outer peripheral surface along the radial direction at positions facing the upstream portion 36 of the filter medium 31 on the rear end side of the deformed valve body 28.

  Further, the lid case 4 is formed with a transparent window portion 41 facing the dust collection chamber 9 and having a filter 42 detachably provided on the inner side facing the window portion 41.

  The filter 42 is, for example, an odor decomposition filter having a photocatalyst activated by light entering the dust collection chamber 9 from the window 41, and decomposes odor contained in the exhaust air.

  Further, a wall portion 45 that partitions the dust collection chamber 9 and the electric blower chamber is provided at the rear portion of the dust collection chamber 9, and the electric blower chamber and the dust collection chamber 9 are communicated with the wall portion 45. A communication hole (not shown) is formed. The communication holes are provided with ribs in a lattice shape, and a filter (not shown) is attached to the electric blower chamber side so as to cover the whole.

  Further, an exhaust purification filter 47 is attached to the front side of the wall portion 45, that is, the dust collection chamber 9 side. The exhaust cleaning filter 47 includes a frame body 48 formed in a lattice shape, and a filter body 49 attached to the frame body 48 and finer than the filter media 31 and 32, and is attachable to and detachable from the wall portion 45. It has become.

  The filter body 49 has a finer mesh than the filter media 31 and 32 of the bag body 22, and is a sponge that collects fine dust that cannot be collected by the bag body 22 of the dust collection bag 8, that is, fine dust attached thereto. This filter is detachably provided on the frame 48.

  Next, the operation of the first embodiment will be described.

  First, the lid case 4 of the main body case 5 is opened, the filters 42 and 47 are attached to the lid case 4 and the dust collection chamber 9, the dust bag 8 is fitted into the dust collection chamber 9, and the suction opening 26 is connected to the hose connection port. 11 and the bag body 22 is disposed in the dust collecting chamber 9 and the lid case 4 is closed.

  Then, the communication pipe 12a of the dust collection hose 12 is connected to the hose connection port 11, and the base end of the extension pipe 14 having the suction port body 15 connected to the tip is connected to the proximal operation pipe 13 of the dust collection hose 12. Connect to the tip.

  Thereafter, while holding the operation unit 16 of the hand operation tube 13, a predetermined operation switch 17 of the operation unit 16 is turned on to drive the electric blower 6 in the main body case 5.

  Then, the operator grips the operation unit 16 and cleans the suction port body 15 by operating it in the front-rear direction.

  At this time, the negative pressure due to the driving of the electric blower 6 acts to the suction port body 15 through the dust collecting hose 12, the hand operation tube 13 and the extension tube 14, and air is sucked in from the suction port body 15 together with dust. Suction air containing dust flows into the main body case 5 via the extension pipe 14, the hand control pipe 13, the dust collecting hose 12 and the hose connection port 11.

  The suction air flowing into the main body case 5 travels straight along the communication pipe 12a from the suction opening 26 of the mouth frame 21 into the bag body 22 into the dust collection bag 8 of the dust collection chamber 9. be introduced.

  Here, as shown in FIG. 1, the relatively heavy coarse dust D travels straight along the axial direction from the communication pipe 12 a, hits the downstream portion 35 of the filter medium 31, and is collected in the dust bag 8. The On the other hand, fine dust having a relatively small weight passes through the upstream portion 36 along the suction air flowing from the communication pipe 12a to the upstream portion 36 and is collected by the filter medium 32.

  That is, the dust sucked by driving the electric blower 6 is inertially separated by the dust collection bag 8.

  In addition, as shown in FIG. 2, when the coarse dust D accumulates in the dust bag 8, it becomes difficult for the suction air to pass through the downstream portion 35 from the communication pipe 12 a. At this time, the coarse dust D that has passed through the communication pipe 12a advances straight due to the inertia of the suction air and is stored in the dust collecting bag 8, and the most part of the suction air is the upstream portion 36 of the filter medium 31 having high air permeability. And, it passes through the filter medium 32 and is sucked into the electric blower 6, and fine dust is collected during the passage.

  Further, the suction air from which the dust is collected is collected by the filter body 49 and then passes through the electric blower 6 to become exhaust air, and is exhausted from the exhaust hole (not shown) to the outside of the main body case 5. The

  Further, in the dust collection chamber 9, the filter 42 is acted on by light incident from the window portion 41 to decompose the odor in the dust collection chamber 9.

  When the dust bag 8 is full of dust, the lid case 4 is opened, the dust bag 8 is removed from the dust chamber 9 and discarded, and then a new dust bag 8 is placed in the dust chamber 9. The lid case 4 is closed and the electric vacuum cleaner can be used again.

  As described above, in the first embodiment, the filter medium 31 located on the innermost side of the bag body 22 has the downstream portion 35 located on the electric blower 6 side and the opening portion 33 side, and the downstream portion 35. The upstream portion 36 having a higher air permeability than the upstream portion 36 is formed.

  For this reason, in the conventional case where the entire filter medium is formed of a uniform air-permeable material, the suction air generated by driving the electric blower 6 tends to concentrate on the downstream portion facing the electric blower 6, and this downstream portion is clogged. Whereas the suction force of the electric blower 6 is reduced, in the first embodiment, when the dust sucked by the drive of the electric blower 6 adheres to the downstream portion 35, the upstream portion 36 Since the suction air comes out, the total amount of the suction air flow of the electric blower 6 hardly changes, the decrease in the suction force of the electric blower 6 over time can be suppressed, and the suction force of the electric blower 6 can be maintained over a long period of time. Can be maintained.

  Even if the downstream portion 35 of the filter medium 31 is clogged, the coarse dust D accumulates on the downstream portion 35 side due to inertia, and the fine dust is collected in the upstream portion 36 and the like. Dust efficiency is not reduced.

  Further, by attaching the upstream portion 36 of the filter medium 31 to the mouth frame 21, the upstream portion 36 in the bag body 22 becomes the portion closest to the communication pipe 12 a, so that the communication pipe 12 a enters the bag body 22 of the dust collection bag 8. The suction air that has flowed in becomes easier to escape from the upstream portion 36, and the suction force of the electric blower 6 can be maintained for a longer period of time.

  Then, the air permeability in the upstream portion 36 is further improved by making the interval between the upstream portion 36 of the filter media 31 and the filter media 32 wider than the predetermined interval between the downstream portion 35 and the filter media 32, and the suction air However, the suction force of the electric blower 6 can be maintained for a longer period of time.

  Further, by opening the opening 38 on the outer peripheral surface facing the upstream portion 36 of the communication pipe 12a, the suction air passing through the communication pipe 12a can easily flow to the upstream portion 36 through the opening 38, and the suction air Therefore, the suction force of the electric blower 6 can be maintained.

  In the first embodiment, the dust bag 8 may be formed by stacking three or more layers of breathable materials. In this case, the downstream portion and the breathable material located on the innermost side are also formed. By forming the upstream portion in the same manner, the same operational effects as in the first embodiment can be obtained.

  Further, the communication pipe 12a is located at a position where it does not protrude toward the bag body 22 with respect to the suction opening 26 of the mouth frame 21, for example, as shown in the second embodiment shown in FIG. It is also possible to make the positions substantially flush with each other. In this case, the suction air flowing into the bag body 22 from the communication pipe 12a easily flows to the upstream portion 36 without providing the opening 38 of the first embodiment in the communication pipe 12a. The effect similar to that of the first embodiment can be obtained, and the suction force of the electric blower 6 can be maintained over a long period of time simply by attaching the dust bag 8 without changing the configuration of the vacuum cleaner. .

  Furthermore, the upstream portion 36 of the filter medium 31 does not need to be attached to the mouth frame 21 as long as it is located on the upstream side of the filter medium 31, that is, on the hose connection port 11 side.

  The upstream portion 36 of the filter medium 31 may be fine enough to allow, for example, cotton dust to pass through. In this case, cotton dust or the like that has passed through the upstream portion 36 is located between the upstream portion 36 and the filter medium 32, and fine dust that has passed through the upstream portion 36 can be collected by this cotton dust or the like.

  The details of the vacuum cleaner are not limited to the above-described configuration. The vacuum cleaner is not limited to the canister type, and can be a self-propelled type (running type) as long as the dust bag 8 can be used. Auxiliary type) or autonomous traveling type (robot type) electric vacuum cleaner, etc., for example, an upright type in which the suction port 15 is formed directly on the lower surface of the vacuum cleaner body 1, or a handy type, etc. It can be used in correspondence.

It is a longitudinal cross-sectional view which shows the vacuum cleaner provided with the dust collection bag of the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which dust has collected in the dust collection bag of a vacuum cleaner same as the above. It is a perspective view which shows a vacuum cleaner same as the above. It is a longitudinal cross-sectional view which shows the vacuum cleaner provided with the dust collection bag of the 2nd Embodiment of this invention.

Explanation of symbols

1 Vacuum cleaner body 6 Electric blower 8 Dust collection bag
11 Hose connection port as main unit suction port
12a communication pipe
21 Mouth frame
22 bags
31, 32 Filter media as a breathable material
33 opening
35 Downstream part
36 Upstream part
38 opening

Claims (4)

A dust collection bag for collecting dust sucked in by driving an electric blower housed in a vacuum cleaner body,
The bag is formed in a bag shape having an opening portion by a plurality of laminated breathable materials, and includes a bag body that collects dust introduced from the opening portion,
The breathable material located on the innermost side is
A downstream portion located on the electric blower side;
A dust collection bag having an upstream portion located on the opening side and having a larger air permeability than the downstream portion. It has a mouth frame to which the opening side of each breathable material of the bag is attached,
The dust collection bag according to claim 1, wherein an upstream portion of the breathable material located on the innermost side is attached to the mouth frame. The bag body is laminated with a plurality of layers of breathable materials at predetermined intervals,
The breathable material located on the innermost side of the bag body is attached at an interval wider than the predetermined interval with respect to the attachment position on the opening side of the breathable material located on the outside. The dust bag according to claim 1 or 2. A vacuum cleaner body containing an electric blower,
The dust bag according to any one of claims 1 to 3, wherein the dust bag is located on a suction side of the electric blower and can be attached to the cleaner body.
A main body suction port provided in the vacuum cleaner main body and communicating with the suction side of the electric blower through the dust bag;
A communication pipe inserted into the opening of the dust bag in a state connected to the main body suction port,
The communication pipe includes a plurality of openings facing an upstream portion of the dust bag at a position inserted into the opening of the dust bag.

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