JPS582690B2 - vacuum cleaner filter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter device for a vacuum cleaner, which spreads the sucked air flow to the periphery using a filter, and circulates a part of the air flow along the inner surface of a dust collecting section to collect dust. The present invention relates to a filter device in which dust is deposited in a portion.

The conventional filter device of this type of vacuum cleaner consists of a primary filter in the form of a mesh having a coarse ventilation section, and a second filter made of thick porous material such as polyurethane foam disposed on the side opposite to the suction side of the primary filter. It consists of a secondary filter and a tertiary filter made of fine cloth placed on the side opposite to the suction side of the tertiary filter. Coarse dust is captured by the primary filter and passed through the primary filter. In this configuration, most of the fine dust is captured by the secondary filter and tertiary filter, so the captured dust is trapped inside the filter support. dust is attracted to the suction surface of the secondary filter, and the secondary filter is easily clogged.In order to increase the amount of dust sucked, the p-over area of the filter must be increased, or the wall thickness of the secondary filter must be increased to increase the volume. It is necessary to increase the size of the vacuum cleaner or make the filter device larger than the overall size of the vacuum cleaner, which increases the cost of the filter device.Moreover, due to the demand for smaller and lighter vacuum cleaners, the size of the dust collection section has to be increased. The volume is reduced, and in order to maintain the volume of the dust collecting part, the dust collecting part must be enlarged, which has the disadvantage that the entire vacuum cleaner becomes large.

The present invention has been made in view of the above points, and includes a cloth-like filter member attached to the suction surface side of a thick-walled filter member having air permeability, thereby reducing the airflow that hits the suction surface side of the cloth-like filter member. In the filter device, the filter device is configured such that the thick filter member is expanded to the periphery along the suction surface of the cloth-like filter member, and the dust is returned to the suction side along the inner surface of the dust collecting part, and the dust is deposited in the dust collecting part. A space is substantially formed between the suction surface of the filter and the cloth-like filter member, and the cloth-like filter member is vibrated as the velocity of the sucked air changes to remove dust attached to the cloth-like filter member. This reduces the amount of dust trapped by the thick filter member and the main filter installed on the opposite side of the suction surface of the thick filter member, increasing the size of the filter device. Even if you use a filter material that is not suitable for cleaning, such as furnace paper with excellent shape retention, as the main filter, the amount of dust captured by the main filter is small, and it will not be damaged or damaged by frequent dust removal. To provide a filter device for a vacuum cleaner which has excellent durability, can be used continuously without having to perform a dust removal operation of the filter device every short period of time, and has no fear of dust removal.

The present invention includes a thick plate-like filter member having air permeability, which is disposed in a dust collection part of a vacuum cleaner body facing a suction port, and a cloth-like filter member attached to the suction surface side of the thick filter member. The suction surface of the thick filter member is formed into an uneven surface having many unevenness, a cloth-like filter member is attached to the protrusions of the uneven surface of the thick filter member, and the unevenness of the thick filter member is A space is formed between a recess in the surface and the cloth filter member facing the recess, the cloth filter member is made of a stretchable cloth material, and the thick filter member of the cloth filter member is The portion facing the concave portion serves as a vibrating portion.

Next, the structure of an embodiment of the present invention will be explained with reference to the drawings.

Reference numeral 1 denotes a vacuum cleaner body, which is composed of an electric side case 2 and a dust collection side case 3 that is detachably connected to the opening of the electric side case 2. An upward locking part 4 is formed on the edge, a cranop locking hole 5 is formed in the upper part, and a locking part that is removably engaged with the locking part 4 is formed at the lower part of the opening of the dust collection side case 3. A joint portion 7 is formed facing downward, and a clamp hook body 8 that is removably locked in the locking hole 5 is provided at the top.

Further, on the front side of the electric side case 2, a vibration-proof support 11 made of rubber or the like is provided inside a support wall surface 10 having a ventilation part 9. The front part of the electric blower 13 is fitted and supported by the vibration isolating support 11 so that the suction side of the electric blower 13 is communicated with the air passage 12 which communicates with the air passage 12 .

The rear part of the electric blower 13 is supported by a vibration-proof support 16 made of rubber or the like on a partition wall 15 forming a cord storage part 14, and the discharge side of the electric blower 13 is is in communication with an exhaust hole 18 formed on the back surface of the electric side case 2 via an exhaust passage 17 .

Further, the cord reel storage section 14 has a cord reel 19.
is energized in the winding direction by the mainspring spring 26 on the rotary support shaft 20, and is rotatably supported.

Further, wheels 21 are mounted on both sides of the electric power side case 2 .

Further, a handle portion 22 is formed on the upper part of the electric-powered side case 2.

Next, a suction port 23 is formed on the front surface of the dust collection side case 3 to which a hose connected to a suction port body such as a floor brush is connected.
The opening end of this suction port 23 projects inward.

In addition, a filter device 2 is installed at the rear opening of this dust collection side case 3.
4 is provided.

This filter device 24 is composed of a -order filter 27 provided at the front of a filter support 25 and a secondary filter 28 serving as a main filter.

A packing 29 is fitted around the periphery of the filter support 25 of the filter device 24 .

This packing 29 includes a protrusion 30 that is brought into close contact with the inner circumferential surface of the dust collection side case 3, and a supporting wall surface 1 of the electric side gate 2.
A protruding edge 31 that is brought into close contact with 0 is formed.

Further, the primary filter 27 is a porous filter member 33 having a plate-like thickness and having air permeability, such as expanded polyurethane foam.
and a cloth-like filter member 34 attached to the front suction surface side of the filter member 33.

Further, as shown in FIG. 2, the thick porous filter member 33 of the primary filter 27 is formed with an uneven surface 35 having many unevenness on its suction surface side, and the protrusions 36 of the uneven surface 35 are formed on the suction surface side.
The cloth-like filter member 34 is attached by contacting, gluing, welding, etc., and the cloth-like filter member 34 is placed between the concave portion 37 of the uneven surface 35 of the thick filter member 33 and the cloth-like filter member 34 facing the concave portion 37. A loose vibration section 39 is formed in a portion of the cloth-like filter member 34 that forms a space 38 and faces the space 38 that faces the recess 37 .

The cloth-like filter member 34 is preferably made of fibers such as polyamide, polyester, polypropylene, etc., and has a smooth surface with relatively little fuzz.

The cloth-like filter member 34 is made of a stretchable cloth-like material, that is, a cloth-like material that can be stretched by weaving or knitting, or a cloth-like material made of stretchable rubber-like fibers that can be stretched by weaving or knitting. For example, 1 ricot is suitable.

Furthermore, the secondary filter 28 of the main filter is formed of a fine mesh fabric material having air permeability.

The secondary filter 28 may also be formed of a filter member formed by forming layers of a large number of fibers such as furnace paper whose main component is cotton linter pulp or the like, and alternately bent to have a mountain-shaped cross section.

A locking edge 41 is formed on the front opening edge 40 of the filter support 25, and the outer edge on the suction surface side of the primary filter 27 fitted to the filter support 25 is compressed by the locking edge 41. The surface of the primary filter 27 is supported so as to form a protrusion on the suction surface side, and the secondary filter 28 is hermetically fitted and fixed to the filter support 25.

Further, a handle 42 is formed on the upper part of the dust collecting side case 3, and a flexible ring 43 is provided on the lower surface.

The filter device 24 is fitted into the back opening of the dust collecting case 3 and held in the inner dust collecting part 44 of the dust collecting case 3, and the primary filter 27 is opposed to the opening end of the suction port 23.

Next, the operation of this embodiment will be explained.

Air sucked through the suction port 23 by the drive of the electric blower 13 flows into the dust collecting section 44, gradually expanding the flow cross-sectional area while -
It is sucked in from the suction surface of the next filter 27, and the −th order filter 2
7, filtered through a secondary filter 28, passed through an electric blower 13, and then discharged from the electric side case 2 through an exhaust hole 18.

In addition, a part of the airflow that hits the cloth-like filter member 34 of the primary filter 27 spreads to the periphery due to the surface resistance, that is, the ventilation resistance, of the cloth-like filter member 34 (line A in FIGS. 2 and 3). The dust is returned to the suction surface side along the inner surface of the dust collector 44, and the dust is deposited in the dust collector 44.

Further, since the outer edge of the primary filter member 27 is compressed and the surface of the primary filter 27 on the suction surface side is protruded, a part of the airflow flowing along this protruded surface does not spread to the periphery. Airflow is efficiently and smoothly returned to the suction surface side.

When a change in the suction air flow occurs due to the movement of a suction port body such as a floor brush with a hose (not shown) connected to the suction port 23 of the vacuum cleaner Honkyu 1, this change in air flow is caused by the change in the primary filter 2.
Since a space 38 is formed between the cloth-like filter member 34 and the four parts 37 of the uneven surface 35 of the thick filter member 33 when the transmission is transmitted to the cloth-like filter member 34 of No. 7, the concave portion of the cloth-like filter member 34 37 is vibrated as shown by the chain line in FIG.
The dust adhering to the cloth-like filter member 34 is blown off by the impact, and the dust that has been dusted off from the cloth-like filter member 34 is refluxed along the inner surface of the dust collection part 44 by the air flow that spreads along the suction surface of the cloth-like filter member 34. Ru.

Furthermore, by using a stretchable cloth material for the cloth filter member 34, the amplitude of the vibration of the vibrating portion 39 of the portion of the cloth filter member 34 facing the concave portion 37 increases due to changes in air flow, and the cloth filter The dust removal effect of the member 34 is enhanced.

In addition, as shown in FIG. 3, the cloth-like filter member 34 has wrinkle-like folds 45 formed in the vibrating portion 39 of the portion facing the uneven surface 35 of the thick filter member 33 by appropriate means such as heating. When the cloth-like filter member 34 vibrates due to air pressure, the folds 45 expand and contract, thereby increasing the dust removal effect.

According to the present invention, a stretchable cloth-like filter member is attached to the protrusion of the suction surface of the uneven surface having many irregularities of the thick filter member, and the recess of the thick filter member of the cloth-like filter member is attached. Since the opposing part is the vibrating part, the surface resistance ν of the cloth-like filter member, that is, the ventilation resistance, is large, and a part of the airflow that hits the suction surface side of the cloth-like filter member spreads to the periphery along the suction surface. , an air flow flows along the inner surface of the dust collecting section equipped with a filter device, and when the amount of suction changes due to the movement of a floor brush etc. that sucks in dust, a change occurs in the suction air flow, and this air flow changes. Due to this change, the part of the cloth-like filter member facing the suction port that faces the space of the thick filter member is vibrated, and since the cloth-like filter member can be expanded and contracted, the amplitude of the vibration of the vibrating part is large, and the cloth-like filter member faces the suction port. A large impact is applied to the filter member, and the dust adhering to the cloth-like filter member is brushed off by the vibration impact, and this dust is spread around the periphery of the suction surface of the cloth-like filter member.
It is carried by inertia by the air flow that returns along the inner surface of the dust collecting part and is deposited on the dust collecting part, forming a cloth-like material. The filter member is less likely to be clogged, a large amount of dust can be continuously captured, the effect of removing dust attached to the cloth filter member is enhanced, and the clogging of the thick porous filter member can be reduced. There is no need to increase the thickness of the member, and the volume of the dust collecting section can be effectively utilized without reducing the volume of the small dust collecting section.

Furthermore, compared to thick filter members such as polyurethane foam, cloth-like filter members have excellent color fastness when dyeing, are several orders of magnitude better in tensile strength, have improved durability, and have good marketability.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a vacuum cleaner using a filter device according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of a portion of the same filter device, and Fig. 3 is another embodiment. FIG. 2 is an enlarged cross-sectional view of a portion of the filter device. 33... Thick filter member, 34...
Cloth-like filter member, 35... one uneven surface, 3Y...
... recess, 38 ... space, 45 ...
・Folds.

Claims (1)

[Scope of Claims] 1. A thick plate-like filter member having air permeability, which is disposed in the dust collection part of the vacuum cleaner body facing the suction port, and a cloth attached to the suction surface side of the thick filter member. The suction surface of the thick filter member is formed into an uneven surface having many unevenness, and a cloth-like filter member is attached to the protrusion of the uneven surface of the thick filter member. A space is formed between a recess in the uneven surface of the thick filter member and the cloth-like filter member facing the recess, and the cloth-like filter member is made of a stretchable cloth material. A filter device for a vacuum cleaner, characterized in that a portion of the thick filter member that faces the recess is a vibrating portion. 2. The filter device for a vacuum cleaner according to claim 1, wherein a wrinkled flap is formed in the cloth-like filter member so as to face the recessed portion of the uneven surface of the thick filter member.