JP2003033307A - Dust filter for vacuum cleaner and vacuum cleaner with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust filter for a vacuum cleaner, which is capable of preventing a net filter adjacent on the lower stream of a nonwoven fabric filter from clogging up with the fibers of the nonwoven fabric filter. SOLUTION: In the dust filter for the vacuum cleaner comprising, at least, the nonwoven fabric filter 31, the net filter 29, frame bodies 20 and 21 which respectively holds both the filters 31, 29, a gap 33 is provided to prevent the fibers protruding from the surface of the nonwoven fabric filter 31 from clogging up the meshes cross of the net filter 29 by intervening parts of the frame bodies 20, 21 between the nonwoven fabric filter 31 and the net filter 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting filter for an electric vacuum cleaner having a non-woven cloth filter or a net filter for collecting dust and an electric vacuum cleaner having the dust collecting filter for an electric vacuum cleaner.

[0002]

2. Description of the Related Art In a conventional electric vacuum cleaner, an electric blower is installed in the rear part of the main body of the vacuum cleaner, and a cyclone type dust collecting container having a dust collecting filter for the vacuum cleaner is provided on the upper part of the vacuum cleaner main body. Removably held on the front part, the air suction port of the electric blower is connected to the inside of the cyclone type dust collection container through the dust filter for the vacuum cleaner, and to the hose connection port that is connected to the upper part of the cyclone type dust collection container. Connect one end of the dust collecting hose,
There is known a cyclone type electric vacuum cleaner in which a suction port is connected to the other end of the dust collecting hose via an extension pipe. The air suction port of the electric blower is communicated with the suction port body through a suction air passage formed by a dust collecting filter for a vacuum cleaner, a cyclone type dust collecting container, a dust collecting hose, an extension pipe and the like.

In such a cyclone type vacuum cleaner,
When the electric blower is operated, the suction negative pressure of the electric blower acts on the suction port body through the dust collecting filter, the cyclone type dust collecting container, the dust collecting hose, and the extension pipe. In this state, by moving the suction port on the surface to be cleaned, the dust on the surface to be cleaned is sucked into the suction port together with the air by the suction negative pressure, and then this sucked air is cyclone-type dust collection. It is swirled into the container. Then, most of the dust in the air is separated from the air by this vortex flow and accumulated on the bottom of the cyclone type dust collecting container by its own weight. On the other hand, the air flowing into the cyclone type dust collecting container is
It will be sucked into the electric blower through the dust collecting filter for the vacuum cleaner above the cyclone type dust collecting container. On this occasion,
The remaining dust is captured by the dust collecting filter, and the cleaned air is sucked into the electric blower.

As the above dust collecting filter for a vacuum cleaner, it is considered that a first net filter, a sponge filter, a non-woven fabric filter, and a second net filter are held between a pair of frames in this order. The first net filter, the sponge filter, the non-woven fabric filter, and the second net filter are set to have finer meshes in this order, and the cyclone-type dust container is provided upstream of the air passage sucked by the first net filter. The second net filter is located on the downstream side of the suction air passage.

In this dust collecting filter for a vacuum cleaner, the air containing the sucked dust passes through the first net filter, the sponge filter, the non-woven fabric filter and the second net filter in this order. At this time, the dust in the air is removed by the first net filter, the sponge filter, the non-woven fabric filter, the second
The coarse particles are sequentially captured by the net filter and removed from the air.

[0006]

However, since the second net filter described above is adhered to the non-woven fabric filter in a state of being in close contact with the non-woven fabric filter, fibers protruding from the non-woven fabric filter enter the eyes to cause a clogging condition. .

On the other hand, in the first net filter and the second net filter, the eyes of the second net filter arranged on the downstream side are set more finely than the eyes of the first net filter. The air passage resistance was larger than the air passage resistance of the first net filter, and it was difficult for air to pass through.

Therefore, a first object of the present invention is to provide a dust collecting filter for a vacuum cleaner which can prevent the net filter adjacent to the downstream side of the non-woven fabric filter from being clogged with the fibers of the non-woven fabric filter.

A second object of the present invention is to provide a dust collecting filter for a vacuum cleaner capable of changing the size of dust particles and fibers which can be captured even if the air passage resistance and the flow rate of the net filter are almost the same. To do.

A third object of the present invention is to provide an electric vacuum cleaner equipped with the above dust collecting filter for a vacuum cleaner.

[0011]

In order to achieve the above-mentioned first object, the invention according to claim 1 is a collector for an electric vacuum cleaner comprising at least a non-woven fabric filter, a net filter, and a frame for holding these filters. In the dust filter, by interposing a part of the frame between the non-woven filter and the net filter, a gap is provided to prevent fibers protruding from the surface of the non-woven filter from entering the eyes of the net filter. It has a feature.

According to the first aspect of the present invention, the fibers protruding from the non-woven fabric filter may get into the eyes of the net fabric filter by forming a gap between the non-woven fabric filter and the net filter by interposing a part of the frame. Since it is prevented, the net filter does not become clogged with the fibers protruding from the non-woven fabric filter, and the dust collecting filter for a vacuum cleaner can be used for a long time.

Further, in order to achieve the above-mentioned second object, the invention according to claim 2 is a collector for an electric vacuum cleaner, which is arranged in an air passage formed in the electric vacuum cleaner and has a plurality of net filters. In the dust filter, the plurality of net filters are characterized in that the net filter arranged on the downstream side of the air passage is formed thicker than the net filter arranged on the upstream side of the air passage. There is.

According to the second aspect of the present invention, among the plurality of net filters, the one arranged on the downstream side of the air passage is formed thicker than the one arranged on the upstream side. , The catching power is strengthened by increasing the passage distance of the dust passing through the net filter without changing the opening area of each net filter, and the fine dust is surely caught without changing the flow rate and air passage resistance. can do.

Furthermore, in order to achieve the above-mentioned third object, the invention according to claim 3 has the dust collecting filter for an electric vacuum cleaner according to claim 1 or claim 2. The opportunity.

According to the invention of claim 3, claim 1
Or, by using the dust collection filter for the electric vacuum cleaner in the electric vacuum cleaner, it becomes possible to prevent clogging of the net filter, and it is not necessary to frequently clean or replace the dust collection filter for the electric vacuum cleaner. It is possible to provide an electric vacuum cleaner that is easy to use without requiring labor and cost.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which a dust collecting filter 10 for an electric vacuum cleaner of the present invention (hereinafter referred to as a dust collecting filter) is assembled so that it can be mounted on the electric vacuum cleaner 1 shown in FIGS. 4 and 5. It is a thing.

The electric vacuum cleaner 1 is provided with a cleaner body 2, and an electric blower 9 (see FIG. 6) is provided in a rear portion of the cleaner body 2.
Built-in). An upper opening type dust collecting container 3 is detachably mounted on the front part of the cleaner body 2, and a dust collecting filter 10 is mounted on the upper part thereof. The dust collection filter 10 is engaged with and fixed to the grip portion 3 a of the dust collection container 3. Further, the upper surface of the cleaner body 2 is covered with a lid 4 as shown in FIG. The lid 4 has a rear portion hinged to the cleaner body 2 by a hinge (not shown) so as to open upward as shown in FIG.

A connection pipe 5 having a hose connection port 5a is provided at the front end of the lid 4. Inside the lid body 4, an opening 5A that opens downward when the lid body 4 is closed and communicates with the connection pipe 5, and a guide air passage 5b that extends in the front-rear direction are formed. At the front and rear ends of the guide air passage 5b, openings 5B and 5C are formed that open downward when the lid 4 is closed. The seal member 4a is attached to the opening 5A, and the seal member 4a is attached to the opening 5C.
d is attached.

The opening 5C faces the intake port 6 provided in the cleaner body 2 when the lid 4 is closed. Moreover, the opening 5C is provided with a seal member 4b that seals around the intake port 6.

The intake port 6 communicates with a suction port (not shown) of the electric blower 9. As a result, the negative suction pressure of the electric blower 9 acts on the inside of the dust collecting container 3 via the intake port 6, the guide air passage 5b and the dust collecting filter 10 so that the air inside the dust collecting container 3 is sucked. Has become. In addition, 7 is an exhaust port for exhausting the air exhausted from the electric blower.

A pair of rectangular protrusions 8 and 8 are provided on the left and right portions of the upper surface of the cleaner body 2, and a recess 8a is provided outside the protrusions 8 and 8 (the other one is not shown). ) Has been formed. On the other hand, a pair of locking claws 8b, 8b are provided on both sides of the lid 4 at an intermediate position in the front-rear direction,
When the lid 4 is closed, the locking claws 8b and 8b are engaged with the recesses 8a of the protrusions 8 and 8 (the other side is not shown) so that the lid 4 is locked to the cleaner body 2. There is. This lock can be released by pressing a release button 8c provided behind the hose connection port 5a of the lid body 4.

When the lid 4 is locked to the cleaner body 2,
The dust container 3 is sandwiched and fixed by the lid 4 and the cleaner body 2 from the vertical direction.

<Dust collection filter 10> This dust collection filter 1
Reference numeral 0 has first and second frame bodies 20 and 21 that hold a circular nonwoven fabric filter and a net filter, which will be described later. The first frame body 20 includes a cylindrical portion 23 having a large number of openings 22a formed by ribs formed in a grid pattern, and a support frame 22.
And a cylindrical portion 23 provided on the peripheral portion of the support frame 22.
And a small-diameter air suction cylinder portion 24 integrally provided on the peripheral portion of the support frame 22. The second frame body 21 includes a disk-shaped support frame 25 having a large number of openings 25a formed by a rib formed in a lattice shape, a cut circular cylinder portion 26 provided at a peripheral portion of the support frame 25, and a cut frame. It has a U-shaped wall portion 27 that is integrally connected to the cut circular portion of the circular cylindrical portion. The circular-cylindrical tubular portion of the second frame body 21 is the tubular upper portion 23 of the first frame body 20.
It can be removably fitted inside. Note that U
By inserting the cut circular cylinder portion 26 into the cylinder upper portion 23 while engaging the character-shaped cylinder portion 27 with the outer peripheral surface of the air suction cylinder portion 24, the cut circular cylinder portion 26 is formed as shown in FIG. It is fitted in the shape portion 23.

The dust collecting filter 10 has an outer surface of the support frame 22, that is, a cylindrical portion 23 of the support frame 22.
The first net filter 28 that covers the surface on the opposite side to the side that projects, and the first net filter 28 that covers the outer surface of the support frame 25, that is, the surface on the opposite side of the support frame 25 on which the truncated cylindrical portion 26 projects. 2 net filter 29. The first net filter 28 is fixed to the support frame 22 by adhesion, heat fusion or ultrasonic fusion, and the second net filter 29 is fixed to the support frame 25 by adhesion, heat fusion or ultrasonic fusion. ing. The first net filter 28 is arranged upstream of the air flow with respect to the second net filter 29. Moreover, the first net filter 28
The second net filter 29 and the second net filter 29 are formed to have substantially the same roughness. The second net filter 29 is formed to be thicker than the first net filter 28.

Further, the dust collecting filter 10 has a sponge filter 30 and a non-woven fabric filter 31 arranged between the supporting frames 22 and 25. This sponge filter 3
0 is arranged on the first net filter 28 side, and the non-woven fabric filter 31 is arranged on the second net filter 20 side. Then, the sponge filter 30 and the non-woven fabric filter 3
1 is sandwiched between the support frames 22 and 25. Moreover, the support frame 22 has a space 32 between the sponge filter 30 and the first net filter 28.
The support frame 25 forms a gap (space) 33 between the non-woven fabric filter 31 and the second net filter 29. The gap 33 may be at least as long as the fibers protruding from the non-woven fabric filter 31 do not enter the second net filter 29.

Further, the dust collecting filter 10 has an air guide 34 integrally provided at the lower end of the air suction cylinder portion 24. As shown in FIG. 7, the air guide 34 directs the air flowing into the air suction cylinder portion 24 in the dust collecting container 3 in the circumferential direction and in the downward direction, and in the dust collecting container 3, the air guide 34 moves downward in the circumferential direction. It is designed to form a swirling flow toward it.

Further, the dust collecting filter 10 includes the first frame 2
There is a seal tube 35 made of silicon rubber or the like fitted on the outer periphery of the tubular section 23 of No. 0. When fitted (fitted) into the upper end portion of the dust collecting container 3, the seal cylinder portion 35 hermetically seals between the dust collecting container 3 and the outer peripheral surface of the first frame 20. Further, the second frame body 2 is provided on the upper edge portion of the seal tube portion 35.
A seal lip 35 a that projects further upward than the first and second net filters 29 is provided. The seal lip 35a elastically contacts the lower surface of the lid body 4 so as to surround the opening 5B provided at the front end of the guide air passage 5b when the lid body 4 is closed on the cleaner main body 2 and surrounds the opening 5B. Is hermetically sealed. Further, at this time, the seal member 4a of the opening 5A elastically contacts the upper end of the suction cylinder portion 24 of the first frame body 20 to seal between the periphery of the opening 5A and the upper end of the suction cylinder portion 24. 5A and suction cylinder 2
It communicates with 4.

Next, the operation of the electric vacuum cleaner 1 will be described.

In order to perform cleaning using the electric vacuum cleaner 1, first, a switch (not shown) formed on the main body 2 of the vacuum cleaner is turned on to operate the electric blower 9 to generate suction negative pressure and to generate air. Dust on the surface to be cleaned will be cleaned.

The air sucked into the electric vacuum cleaner 1 first enters the vacuum cleaner main body 2 through the hose connection port 5a from the suction port body (not shown) through an extension pipe (not shown) and is connected. It passes through the opening 5A via the pipe 5. Then, this air enters the inside of the dust collecting container 3 through the opening 5A and the air suction cylinder portion 24 of the dust collecting filter 10 to which the seal member 4a attached to the opening 5A is elastically attached. At this time, the air comes into contact with the air guide 34 provided so as to project from the opening at the lower end of the air suction cylinder 24, and generates a vortex along the peripheral wall of the dust collecting container 3 (see FIG. 7). Due to this overflow, most of the dust is separated from the air and accumulated under the dust collection container 3 by its own weight, while the air is discharged from above the dust collection container 3 and passes through the dust collection filter 10.

The air discharged from above the dust collecting container 3 is
The dust collection filter 10 goes upward from a large number of openings 22a formed in the first frame 20, passes through the dust collection filter 10, and is discharged through a large number of openings 25a of the second frame 21. Further, this air is applied to the opening 5B facing the opening 22a.
Is sucked into the intake port 6 through the guide air passage 5b and the opening 5C. The air sucked into the intake port 6 is sucked into the intake port 6 by the airtight seal portion 4b without leaking outside, and is sucked into the electric blower 9 through the intake air passage 9a of the electric blower 9. After that, it is exhausted from an exhaust port (not shown) of the electric blower 9 and exhausted to the outside from the exhaust port 7 via an exhaust air passage (not shown).

The air passing through the dust collecting filter 10 contains the sucked dust, and the first net filter 28,
The sponge filter 30, the nonwoven fabric filter 31, and the second net filter 29 pass through the dust collecting filter 10 in this order. Here, since each filter is set in a state in which the mesh gradually becomes finer from the upstream side of the air passage, the dust contained in the air is the first net filter 28, the sponge filter 31, and the non-woven fabric filter 31. , The second net filter 2
The coarse particles are sequentially captured by 9 and removed from the air.

By the way, it is conceivable that the fibers may protrude from the non-woven fabric filter 31 which is made of cloth by the technique such as compression due to the passage of air, but the non-woven fabric filter 31 and the second net filter 29. A support frame 25 is interposed between
33 is formed, and the fibers protruding from the non-woven fabric filter 31 are prevented from entering the eyes of the second net filter 29 disposed on the downstream side and causing clogging.

Therefore, the protruding fine fibers do not penetrate into the second net filter 29 so as to pierce the second net filter 29, so that the labor for cleaning the dust collecting filter 10 can be reduced and the cost can be reduced. Like

Moreover, in order to facilitate handling, the second
Since the gap (space) 33 is formed by using the first and second frames 20 and 21 that integrally hold the net filter 29 and the non-woven fabric filter 31, the structure is extremely simple.
Since the gaps 33 are formed by the grid-shaped ribs of the second frame body 21, the increase in air passage resistance can be suppressed as much as possible.
The suction force is kept good.

Further, the first net filter 28 arranged on the upstream side of the air passage is in the coarsest state, and the second net filter 29 arranged on the downstream side of the air passage is in the finest state. However, the size of each mesh is the same, and the thickness of each filter is different.

That is, as shown in FIGS. 8 (a) and 8 (b),
A net filter 2 in which the net opening width of the net filter is t and the thicknesses are d1 and d2 (d1 <d2), respectively.
8 and 29, for example, the trapping force for trapping the dust P of the same size that is fibrous and bent or curved is compared. At this time, even if the dust P passes through the thin first net filter 28 without being caught by the inner wall of the eye, the second net filter 29 causes the dust P to pass through the second net because the distance between the inner wall of the eye is long. The filter 29 is easily caught by the eyes of the second net filter 2
It can be seen that the capturing power of 9 is larger.

Also, the respective net filters 28, 2 are
Comparing the air passage resistance and the flow rate of the ninth eye, since the opening widths of both eyes are both t, the air passage resistance does not substantially change, and the flow rate of the inflowing air is almost the same.

If only the openings of the eyes are narrowed without changing the thickness of the net filter in order to increase the trapping force of the net filter, the air passage resistance of the fluid flowing therethrough increases and the air flow rate decreases. Not preferable.

Therefore, if the thickness of the net filter is made different, the size of dust and fibers that can be trapped can be changed even if the air passage resistance and the flow rate are almost the same, and the second filter disposed on the downstream side of the air passage. Even if the net filter 29 is formed thicker than the first net filter 28 arranged on the upstream side of the air passage, the size of the dust that can be captured by the second net filter 21 is the size of the eyes. Is the same as that when the
Although 9 is slightly larger than the first net filter 28, it is almost the same as the first net filter 28, and the flow rate of the inflowing air is larger than that when the size of the mesh is reduced.

[0043]

As described above, according to the invention of claim 1, a gap is provided between the non-woven fabric filter and the net filter, and the net filter can be clogged with fibers protruding from the non-woven fabric filter. To be prevented.

Therefore, it is possible to provide a dust collecting filter for a vacuum cleaner which can prevent the net filter adjacent to the non-flow side of the non-woven fabric filter from being clogged with the fibers of the non-woven fabric filter.

According to the second aspect of the invention, the net filter arranged on the downstream side of the air passage is formed thicker than the one arranged on the upstream side, and the flow rate of the fluid passing through the net filter is increased. Also, it is possible to capture fine dust with almost no change in the air passage resistance.

Therefore, it is possible to provide a dust collecting filter for a vacuum cleaner which can change the size of dust particles or fibers which can be finely divided even if the airflow resistance and the flow rate of the net filter are almost the same.

According to the invention of claim 3, when the above dust collecting filter for a vacuum cleaner is used in an electric vacuum cleaner, the clogging of the net filter is prevented, and the dust collecting filter for a vacuum cleaner is frequently cleaned and replaced. It is possible to provide a convenient electric vacuum cleaner that does not need to be carried out.

Therefore, it is possible to provide the above dust collecting filter for an electric vacuum cleaner.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a dust collecting filter for an electric vacuum cleaner according to the present invention.

FIG. 2 (a) is a perspective view of the first frame of the dust collecting filter for an electric vacuum cleaner according to the present invention, as viewed from the inside. (B) It is a perspective view when the 2nd frame of the dust collecting filter for electric vacuum cleaners concerning the present invention is seen from the inside.

FIG. 3 is a sectional view of a dust collecting filter for an electric vacuum cleaner according to the present invention.

FIG. 4 is an overall perspective view of the electric vacuum cleaner including the dust collecting filter for the electric vacuum cleaner according to the present invention when the cover is opened.

FIG. 5 is an overall perspective view of the electric vacuum cleaner according to the present invention when the cover is closed.

FIG. 6 is an explanatory view showing the flow of air sucked into the electric vacuum cleaner according to the present invention.

FIG. 7 is an explanatory diagram showing a flow of air when the air passes through the dust collecting filter for the electric vacuum cleaner according to the present invention and the dust collecting container equipped with the dust collecting filter.

8 (a) and 8 (b) are explanatory views showing a difference in action due to a difference in thickness of the net filter according to the present invention.

[Explanation of symbols]

1 vacuum cleaner 10 Dust collection filter for vacuum cleaner 20 First frame 21 Second frame 28 First Net Filter 29 Second Net Filter 30 sponge filter 31 Nonwoven filter 32 gap 33 Gap

Continued front page    (72) Inventor Maaino Matsuno             Toshiba Tec, 43 Horiyamashita, Hadano City, Kanagawa Prefecture             Hadano Factory Co., Ltd. (72) Inventor Norio Takemoto             Toshiba Tec, 43 Horiyamashita, Hadano City, Kanagawa Prefecture             Hadano Factory Co., Ltd. F-term (reference) 3B062 AH02 AH05

Claims (3)

[Claims] 1. A dust collecting filter for an electric vacuum cleaner, comprising at least a non-woven fabric filter, a net filter, and a frame holding these filters, wherein a part of the frame is provided between the non-woven fabric filter and the net filter. A dust collecting filter for a vacuum cleaner, characterized in that a gap is provided to prevent fibers protruding from the surface of the non-woven fabric filter from entering the eyes of the net filter by being interposed. 2. A dust collecting filter for an electric vacuum cleaner, which is disposed in an air passage formed in an electric vacuum cleaner and includes a plurality of net filters, wherein the plurality of net filters are arranged on a downstream side of the air passage. The dust collecting filter for an electric vacuum cleaner, wherein the provided net filter is thicker than the net filter provided on the upstream side of the air passage. 3. An electric vacuum cleaner comprising the dust collecting filter for an electric vacuum cleaner according to claim 1 or 2.