JP2003180578A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone type canister-based vacuum cleaner which facilitates cleaning inside the dust box. <P>SOLUTION: In the vacuum cleaner, the body 1 thereof is provided with a cyclone type dust box 2. In the dust box 2, an outer filter part is so arranged as to form the first cyclone space between it and the internal wall of the dust box 2, in the outer filter part, an inner filter part is so arranged as to form the second cyclone space between it and the internal wall of the outer filter part and furthermore, the outer filter part is provided with a flange part extended toward the internal wall of the dust box. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a vacuum cleaner. More specifically, it relates to an electric vacuum cleaner provided with a cyclone type dust box.

[0002]

2. Description of the Related Art Conventional electric vacuum cleaners, especially upright type (vertical) vacuum cleaners are detachably mounted in the suction path of the cleaner body without using a disposable dust-collecting paper pack. A cyclone-type dust collector that has a cylindrical filter inside the dust collection case that generates a swirling air flow (so-called cyclone) so that the dust filtered by this filter can be stored in the dust collection case. A device using a device is known. This dust collector is economical because it can be used semipermanently due to the maintenance of the filter, as compared with a disposable paper pack.

As a cyclone type electric vacuum cleaner, a dust separating device according to the invention of Dyson (Table 10-51).
1880) and the like are known. For example, the cyclone type electric vacuum cleaner shown in FIG. 10 generates a double cyclone by providing an inner cyclone case 52 inside the dust box 51. The lower part of the inner cyclone case 52 is
The first cyclone space 54 of the dust box 51 is airtightly closed by the cyclone tube 53. The upper part of the inner cyclone case 52 communicates with the first cyclone space 54 of the dust box 51 via the shroud 60 having air permeability.

Exhaust port 5 at the upper end of the inner cyclone case 52
Due to a negative pressure generated by a blower (not shown) connected to 8 or the like, air containing dust is introduced from the outside into the first cyclone space 54 inside the dust box 51 through the intake pipe 55, and the first cyclone space It swirls inside 54 and large dust falls and accumulates on the cyclone tube 53. Further, it is introduced into the second cyclone space 56 inside the inner cyclone case 52 through the shroud 60, swirls inside the second cyclone space 56, and a little larger dust falls and the space 5 below the cyclone tube 53.
Deposition at 7. The air from which dust has been removed is exhausted from the exhaust port 58 at the upper end of the inner cyclone case 52.

[0005]

However, as shown in FIG.
The conventional electric vacuum cleaner shown in (1) has a cyclone tube 53 that hermetically partitions the interior of the dust box 51, and thus has a complicated configuration. Therefore, in order to remove dust accumulated on the upper side and the lower side of the cyclone tube 53, it is necessary to take out the inner cyclone case 52, the cyclone tube 53 and the shroud 60 from the dust box 51 to the outside once, There is a problem that it is very difficult to clean the inside of the dust box.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cyclone type canister type electric vacuum cleaner which can easily clean the inside of the dust box.

[0007]

The electric vacuum cleaner of the present invention comprises:
A cyclone type dust box is provided in the cleaner body, and an outer filter portion that forms a first cyclone space between the dust box and an inner wall of the dust box is disposed in the dust box, and an inner wall of the outer filter portion is provided in the outer filter portion. And an inner filter portion that forms a second cyclone space between the two, and a flange portion that extends toward the inner wall of the dust box is provided in the outer filter portion.

It is preferable that a flange portion is further provided at a lower portion of the inner filter portion toward an inner wall of the outer filter portion.

It is preferable that a tip portion of the collar portion is bent downward.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the vacuum cleaner of the present invention will be described in more detail with reference to the drawings. 1 is a perspective explanatory view showing an embodiment of the electric vacuum cleaner of the present invention, FIG. 2 is a plan explanatory view of the electric vacuum cleaner of FIG. 1, and FIG. 3 is a case where the electric vacuum cleaner of FIG. 1 is viewed from the left side surface. 1 is a perspective view of the dust box of FIG. 1, FIG. 5 is a front view of the dust box of FIG. 1, FIG. 6 is a vertical sectional view of the dust box of FIG. 1, and FIG. 7 is a vertical sectional view of the vacuum cleaner of FIG. FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 6, and FIG. 9 is a cross-sectional explanatory view for explaining the dimensions of the dust box of FIG.

As shown in FIGS. 1 to 8, the vacuum cleaner of the present embodiment is detachable by inserting a cyclone type dust box 2 into the front part of a canister type cleaner body 1 from above. The electric blower 3 is built in the rear part of the cleaner body 1.
Although not shown, a series of suction hoses, suction pipes, and suction tools are connected to the connection port 4 on the front end surface of the cleaner body 1. Further, the cleaner body 1 is provided with a front wheel 1a and a pair of rear wheels 1b and 1c so that it can move on the floor surface.

The dust box 2 is shown in FIGS.
As shown in FIG. 3, inside the transparent or semi-transparent dust box body 5 formed of a substantially cylindrical transparent synthetic resin or the like, the substantially cylindrical outer filter portion 6 and the inner filter portion 7 are concentric with the dust box body 5. Are arranged in a shape.

As shown in FIG. 6, the outer filter portion 6
Is composed of an outer tubular member 8 and an outer filter 9 that covers the periphery of a plurality of slits 8a formed on the side surface of the outer tubular member 8 in the vertical direction.

On the outer peripheral side surface of the outer tubular member 8, a flange portion 10 is provided so as to extend toward the inner wall of the dust box body 5. Inner wall of the dust box body 5 and the collar portion 1
A gap 34 is formed between 0 and 0. Therefore, the inner wall of the dust box body 5 and the outer filter portion 6
Between the first cyclone space 25 surrounded by the inner wall of the dust box body 5, the outer filter 9 and the collar portion 10, and the first cyclone space 25 and the gap 34.
A space 26 is formed for collecting dust communicating with each other.

Since the tip portion 10a of the collar portion 10 is bent downward, when the dust moves from the first cyclone space 25 through the gap 34 to the space portion 26, the dust is caught on the tip portion 10a. Is preferred, which is preferable.

Similarly, the inner filter portion 7 is composed of an inner tubular member 11 and an inner filter 12 that covers the periphery of a plurality of slits 11a formed along the longitudinal direction on the side surface of the inner tubular member 11. Become.

Further, on the outer peripheral side surface of the inner tubular member 11,
A flange portion 13 is provided so as to extend toward the inner wall of the outer tubular member 8. A gap 35 is formed between the inner wall of the outer tubular member 8 and the collar portion 13. Therefore, between the inner wall of the outer tubular member 8 and the inner filter portion 7,
The inner wall of the outer tubular member 8, the inner filter 12, and the collar portion 1
A second cyclone space 27 surrounded by 3 and a space portion 28 that collects dust communicating with the second cyclone space 27 via a gap 35 are formed.

Like the collar portion 10, the tip portion 13a of the collar portion 13 is also bent downward, so that when dust moves from the second cyclone space 27 through the gap 35 to the space portion 28, It is preferable because dust is less likely to be caught on the tip portion 13a.

Outer filter section 6 and inner filter section 7
As shown in FIG. 6, is fixed to the lower surface of the upper lid portion 14 that closes the upper end opening of the dust box body 5 in a hanging state.

Specifically, the inner lid portion 8b extending above the outer tubular member 8 is fitted to the inner wall of the upper lid portion 14 with the seal ring 8c interposed therebetween. The space between the inner lid portion 8b and the dust box body 5 is hermetically sealed by a seal ring 8d provided on the stepped portion of the inner lid portion 8b.
On the other hand, the cylindrical holder 11b having a plurality of slits extending above the inner cylindrical member 11 is used for the cylindrical filter 2
9 is stored inside the upper lid portion 14 in a state of being held.
The seal ring 11 provided at the lower end of the outer peripheral surface of the cylindrical holder 11b is between the cylindrical holder 11b and the inner lid portion 8b.
It is hermetically sealed by c.

An intake pipe 15 is provided on the side surface of the dust box 2.
And the tip end side opening 16 of the intake pipe 15 has a width of the dust box 2 so that it can be directly connected to the connection port 4 (see FIGS. 1 and 7) formed at the center of the cleaner body in the width direction. It is formed near the center of the direction.

Further, the intake pipe 15 on the inner surface of the dust box 2
Since the guide ribs 18 extend in the direction along the inner surface of the dust box 2 near the root-side opening 17 of the dust box 2, the air flowing into the dust box 2 through the intake pipe 15 is guided by the guide ribs 18 inside the dust box 2. The cyclone can be guided in the flowing direction (clockwise in FIG. 8, for example). As a result, the dust-containing air sucked from the intake pipe 15 shown in FIG. 8 swirls in the dust box 2, and high dust collection efficiency can be obtained.

Further, as shown in FIG. 6, the bottom of the dust box body 5 is fitted with a bottom lid 21 which is openable and closable by a hinge 20 provided at the bottom of the handle 19. The bottom lid 21 pushes the upper portion of a lever 22 provided below the intake pipe 15 to move the lever 2
The clamp 23 formed at the lower end of 2 is disengaged from the locking claw 24 on the bottom lid 21 side to open the lower end opening of the dust box body 5.

Therefore, the dust accumulated in the space portion 26 and the space portion 28 inside the dust box main body 5 is not covered by the bottom cover 2.
Since it will fall if 1 is opened, the inside of the dust box 2 can be easily cleaned.

The types and materials of the outer filter 9 and the inner filter 12 are not particularly limited in the present invention, but for example, a mesh filter is provided on the outer periphery of a tubular body which serves as a ventilation passage for filtered air. A filter or the like arranged in a shape is adopted. Further, other filters such as a filter in which a filter paper filter folded in a pleat shape (bellows shape) is arranged in a tubular shape can be employed.

Next, respective flows of dust and air in the vacuum cleaner of the present embodiment will be described.

The dust-containing air sucked from the outside of the cleaner main body 1 enters the dust box 2 through the connecting port 4 and the intake pipe 15 along the inner wall of the dust box main body 5 as shown in FIGS. And turn. Specifically, in the first cyclone space 25, the air swirls into the outer filter 9 while swirling, and the dust collects in the gap 34.
And is drawn downwards to be deposited in the space 26 at the bottom of the dust box body 5.

Similarly, the air flowing inside the outer filter 9 further swirls. Specifically, the second cyclone space 2
In the inside of 7, air flows into the inside filter 7 while swirling, and the space 28 below the collar 13 becomes negative pressure as the swirling occurs. Therefore, dust of a size that cannot pass through the inside filter 12 passes through the gap 35. It is pulled downward through it and is deposited in the space 28 at the bottom of the dust box body 5.

Since the bottom lid 21 is provided with packing 36 for closing the gap between the bottom edge of the outer tubular member 8 and the bottom lid 21, a space is formed along the bottom lid 21. Air does not leak from 26 to the space 28.

The air whose dust has been filtered by the dust box main body 5 is further filtered by a cylindrical filter 29 inside the upper lid portion 14, and then flows out of the dust box 2 through the exhaust port 30 at the rear end of the upper lid portion 14, Communication passage 3 shown in 7
1 is taken into the electric blower 3 and filtered from the electric blower 3 through the exhaust filter 32, and the mesh-shaped exhaust port 33 and the rear wheel 1 formed on the side surface of the cleaner body 1
It is discharged to the outside through the mesh of b or 1c.

In this embodiment, since the cylindrical filter 29 is used, it is possible to obtain a large surface area with a smaller outer diameter than the plate filter. Therefore, the filter can be made smaller than the plate-like filter, and the large surface area reduces the wind speed, which makes it difficult for dust to enter the inside of the filter, and thus clogging is less likely to occur.

Next, the vertical distance between the outer filter 9 and the inner filter 12 shown in FIG. 9 will be described.

In the process of removing dust entering from the intake pipe 15 of the dust box 2 by the outer filter 9 of the outer filter section 6, the distance H ₁ between the intake range of the mesh-shaped outer filter 9 and the intake range of the inner filter 12 Stipulate.

The distance H _{1 is set} to 9.5 mm, 0 mm and −
The collection efficiency was evaluated when three types of 9.5 mm were set. As a result, the collection efficiency is 9.5 mm
In the case of> 0 mm, it was higher in the order of> -9.5 mm.

The difference in the collection efficiency can be considered as follows. That is, the rotational force of the wind becomes weaker in the second cyclone space 27 on the inner side than in the first cyclone space 25 on the outer side. Therefore, if the inner filter 12 is arranged in the suction direction of the outer filter 9, the dust-containing air flows linearly from the outer filter 9 to the inner filter 12 without swirling inside the second cyclone space 27. It is considered that the dust collection efficiency will be low. Therefore, the outer filter 9 is at a position slightly higher than the inner filter 12,
It is preferable that they are arranged at a position higher by about 9.5 mm.

The larger the distance H ₁ , the higher the collection efficiency, but the upper limit is about 9.5 mm because the height of the cleaner body is restricted due to its design.

Next, the relationship of the distance D ₁ between the inner wall of the dust box body 5 shown in FIG. 9 and the air intake portion (slit 8a in FIG. 9) of the outer filter portion 6 will be described.

The distance D ₁ has a great influence on the dust collection efficiency and the suction rate (suction work rate) in the first cyclone space 25. The larger this distance D ₁ , the more effectively the centrifugal separation works, and it becomes more difficult for dust to be sucked into the intake portion of the outer filter portion 6, and the collection efficiency increases.

On the other hand, when the distance D ₁ is increased, when the inner diameter of the dust box body 5 is kept constant, the outer diameter of the intake portion of the outer filter portion 6 and the area proportional thereto are reduced, the air volume is reduced and the suction force is reduced. become weak.

For example, the inner diameter of the dust box body 5 was set to 130 mm, the outer diameter of the intake portion of the outer filter portion 6 was changed, and the collection efficiency and the suction power were measured. The results are as follows.

[0041]

[Table 1]

Collection efficiency: JIS Z8901 4 g of test dust (talc powder) is sucked in 10 g. Suction work rate: Measured by a measuring method defined in JIS C9802.

From the results shown in Table 1, it is the outer filter part that secures the collection efficiency (97 to 98%) equivalent to that of the paper pack type, which is the mainstream of the current vacuum cleaners, and maximizes the suction work rate. 6
The outer diameter of the intake portion is between 60 and 70 mm (when the inner diameter of the dust box body 5 is 130 mm). Therefore, in the vacuum cleaner that collects dust by the centrifugal separation method, the outer diameter of the intake portion of the outer filter portion 6 is equal to that of the dust box body 5.
Most preferably, it should be 54-56% of the inner diameter of.

Next, the outer filter portion 6 shown in FIG.
The relationship of the distance D ₂ between the inner wall of the outer tubular member 8 and the intake portion (slit 11a in FIG. 9) of the inner filter portion 7 will be described.

The distance D ₂ has a great influence on the dust collection efficiency in the second cyclone space 27. This distance D
_{As 2} is smaller, the dust is not sufficiently centrifuged and is sucked into the intake portion of the inner filter portion 7, and the collection efficiency is reduced.

For example, the inner diameter of the outer tubular member 8 of the outer filter portion 6 was set to 60 mm, the outer diameter of the intake portion of the inner filter portion 7 was changed, and the collection efficiency was measured. The results are as follows.

[0047]

[Table 2]

From the results shown in Table 2, in order to secure the collection efficiency (97 to 98%) comparable to that of the paper pack type, which is the current mainstream of electric vacuum cleaners, the outer diameter of the intake portion of the inner filter portion 7 is Thirty
mm or less is preferable (when the inner diameter of the outer tubular member 8 of the outer filter portion 6 is 60 mm). Therefore, if the outer diameter of the air intake portion of the inner filter portion 7 is 50% or less of the inner diameter of the outer tubular member 8 of the outer filter portion 6, a high collection efficiency comparable to that of a paper pack can be obtained.

Next, the relationship of the distance D ₃ between the inner wall of the dust box body 5 and the collar portion 10 shown in FIG. 9 will be described. For example, under the conditions of air volume 1.6~1.7m ³ / mm, the distance D ₃ has evaluated the collection efficiency for the case of 7mm and 10 mm.

When the distance D ₃ is 10 mm, dust is caught in the collar portion 1.
It did not fall while turning in the first cyclone space 25 above 0, and it was difficult to accumulate in the space 26 below the collar 10. Moreover, since the dust continues to swirl in the first cyclone space 25, cotton dust sticks to the mesh of the outer filter 9 or enters the inside of the outer filter portion 6, so that the collection efficiency decreases. On the other hand, when the distance D ₃ is 7 mm, the problem in the case of 10 mm is solved, and high collection efficiency can be obtained.

From the above, it is considered that the smaller the distance D ₃ is, the higher the collection efficiency is. However, if the distance D ₃ is too small, the dust is apt to be clogged in the gap 34 between the inner wall of the dust box body 5 and the collar portion 10. Distance D considering the size of dust
₃ is decided.

Next, the outer filter portion 6 shown in FIG.
The inner wall of the outer tubular member 8 and the collar portion 13 of the inner filter portion 7.
The relationship between the distance D _{4 from} the upper surface of the collar portion 13 and the distance H _{2 from} the upper surface of the collar 13 to the bottom lid 21 will be described.

The distance D ₄ and the distance H ₂ have a great influence on the dust collection efficiency in the second cyclone space 27. The dust that has passed through the outer filter portion 6 is separated into dust and air again in the second cyclone space 27. The dust separated at this time is attracted to the gap 35 between the inner wall of the outer tubular member 8 and the flange portion 13 (since the distance D ₄ is narrow and the flow velocity is fast). Second cyclone space 2
The distance D ₄ is 1 because the dust separated in 7 is relatively fine.
If it is mm or more, there is no problem in collection efficiency. Also, the distance H ₂
If the length is short, the dust collected in the space 28 will be absorbed by the inner filter portion 7.
There is a problem that it will be sucked up again by the intake part of.

Therefore, in order to secure the collection efficiency (97 to 98%) which is the same as the current mainstream of electric vacuum cleaners, the distance D ₄ is in the range of 1 to 3 mm and the distance H ₂ is 30 mm.
If it is above, a high collection efficiency comparable to a paper pack can be obtained.

[0055]

According to the present invention, since two cyclone spaces are provided inside the dust box, high dust collection efficiency can be achieved. Moreover, since the outer filter portion is provided with the flange portion extending toward the inner wall of the dust box, the cyclone space communicating with each other and the space portion collecting dust can be formed with a simple configuration. Therefore, the dust accumulated in the space inside the dust box can be easily removed, and the dust box can be easily cleaned.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view showing an embodiment of an electric vacuum cleaner of the present invention.

2 is a plan view of the electric vacuum cleaner shown in FIG. 1. FIG.

FIG. 3 is an explanatory diagram of the electric vacuum cleaner of FIG. 1 when viewed from the left side surface.

FIG. 4 is a perspective explanatory view of the dust box of FIG. 1;

5 is a front view of the dust box of FIG. 1. FIG.

FIG. 6 is a vertical sectional view of the dust box of FIG.

FIG. 7 is a vertical sectional view of the electric vacuum cleaner of FIG.

8 is a sectional view taken along the line VIII-VIII in FIG.

9 is a cross-sectional explanatory diagram for explaining the dimensions of the dust box of FIG.

FIG. 10 is a cross-sectional view showing a conventional cyclone type dust separation device.

[Explanation of symbols]

1 vacuum cleaner 2 dust box 3 electric blower

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiyuki Fujiyoshi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Hiromichi Matsuhashi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Takaya Azumi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 3B062 AH02 AH05

Claims (3)

[Claims] 1. A vacuum cleaner body is provided with a cyclone type dust box, and an outer filter portion that forms a first cyclone space between the dust box and an inner wall of the dust box is provided in the dust box, and the outer filter portion is provided with the outer filter portion. An electric vacuum cleaner in which an inner filter portion that forms a second cyclone space is provided between the inner wall of the outer filter portion and a flange portion that extends toward the inner wall of the dust box. . 2. The vacuum cleaner according to claim 1, further comprising a brim portion provided at a lower portion of the inner filter portion toward an inner wall of the outer filter portion. 3. The electric vacuum cleaner according to claim 1, wherein a tip portion of the collar portion is bent downward.