JP3460837B1 - Electric vacuum cleaner - Google Patents

Abstract

The present invention provides an electric vacuum cleaner capable of reducing wind path loss, preventing the air volume from dropping even when dust accumulates, and easily removing dust adhering to dust separating means for separating dust from air. To do. A dust separating unit provided in a suction air passage from an intake port of a cleaner body to a suction opening of an electric blower to separate dust from air sucked into the intake port, and a dust separating unit. A dust collecting chamber 55 for collecting dust separated from the air by the separating section 60; In addition, the dust separating section 60 includes a cylindrical filter 62, and the cross-sectional area d of the intake port 52 to the cylindrical filter 62 is
2 is formed smaller than the cross-sectional area D2 of the other end opening 62B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner having a dust separating portion for separating sucked dust and a dust collecting portion for collecting dust.

[0002]

2. Description of the Related Art Conventionally, a cyclone type vacuum cleaner shown in FIG. 9 has been known (for example, refer to Patent Document 1).

Such an electric vacuum cleaner is provided with a dust cup 1 having an open upper portion, an electric blower 2 for making the inside of the dust cup 1 a negative pressure, and the like. Dust cup 1 peripheral wall 1
An intake port 3 is formed at A, and the intake port 3 communicates with an intake port body 4 that sucks dust via an intake passage 5.

The dust sucked from the suction port body 4 is sucked into the dust cup 1 from the suction port 3 of the dust cup 1 through the suction passage 5. A swirling flow is generated in the dust cup 1 to separate dust and air, and only the air is sucked by the electric blower 2 from the upper opening of the dust cup 1 and exhausted to the outside.

[0005]

[Patent Document 1] Japanese Patent Laid-Open No. 2001-104223 (paragraphs 38 and 45, FIG. 2)

[0006]

By the way, in such a vacuum cleaner, the air sucked upward in the intake passage 5 is changed in direction by 90 degrees, and the air is sucked from the intake port 3 into the dust cup 1. Then, it becomes a swirling flow and is rotated along the peripheral wall 1A of the dust cup 1, and thereafter only air is sucked upward by the electric blower 2. In this way, by changing the direction of air flow twice,
Since the air passage loss of the air is large, and the air is sucked into the electric blower 2 after rotating in the dust cup 1,
The air passage loss is very large, and there is a problem that the capacity of the electric blower cannot be fully exerted.

Further, in a normal electric vacuum cleaner in which a paper pack, which is a paper filter, is mounted in the dust collecting chamber, since the air inlet, the paper pack, and the electric blower are arranged in a straight line,
Although the air passage loss does not increase, there was a problem that the air volume would drop extremely if dust was accumulated in the paper pack.

Therefore, an object of the present invention is to provide an electric vacuum cleaner capable of reducing the air passage loss.

[0009]

In order to achieve the above object, the present invention is directed to an electric blower from a suction port of a cleaner body.
Negative pressure chamber part formed in the suction air passage up to the intake opening
A dust separating part , which is provided inside and separates dust from the air sucked into the suction port, and a dust separated from the air in the dust separating part, which is separated from the negative pressure chamber part, are guided by a guide tube.
A vacuum cleaner having a dust collection unit for collecting Te in the
An air passage is formed inside the dust separation part and it is located downstream from the upstream end.
Equipped with a cylindrical filter whose diameter gradually decreases toward the end,
The cross-sectional area of the air inlet to the tubular filter is less formed than the cross-sectional area of the air discharge end of the tubular filter, before
The intake opening of the electric blower has the cylindrical filter in between.
Is located on the opposite side of the suction port and
While being sucked into the air intake opening of the electric blower through the tubular filter , dust that advances straight in the air passage of the tubular filter is guided by the guide tube and collected in the dust collecting portion. It is characterized by being an electric vacuum cleaner.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an electric vacuum cleaner according to the present invention will be described below with reference to the drawings.

In FIG. 1, 20 is a cleaner body,
One end of a hose 21 is detachably connected to the cleaner body 20, and a hand operation pipe 22 is provided at the other end. An extension pipe 23 is detachably connected to the hand operation pipe 22, and a suction port body 24 is detachably connected to a tip end portion of the extension pipe 23. The hand operation tube 22 is provided with an operation section 22A, and the operation section 22A is provided with an operation switch (not shown).

As shown in FIGS. 2 to 5, the cleaner body 20 includes a body case 30, a dust container (dust cup) 50 which is detachably mounted on the body case 30, and a rear portion of the body case 30. And a lid 40 that is hinged to and can be opened and closed in the vertical direction.

The main body case 30 has an electric part 34 having a built-in electric blower 33, and a dish-shaped mounting part 35 protruding forward is provided at the lower part of the front surface of the electric part 34. The dust container 50 is detachably placed on the placing portion 35, and when the lid 40 is closed, the lid 40 and the placing portion 3 are attached.
The dust collecting container 50 is sandwiched and fixed between the two.

Further, the front surface of the electric section 34 is opened, and a filter 80 to be described later is provided in this opening (electric section intake port) 34A.
The frame 34b for pressing down is provided radially.
The opening 34A faces and communicates with the intake opening 33A of the electric blower 33.

A bulging portion 36 is formed on both side surfaces of the body case 30 from an upper portion on the front side to a lower portion on the rear side, and the lower portion of the bulging portion 36 rotatably holds a rear wheel 37. . A plurality of exhaust holes 38 are formed on the front sides of the bulging portion 36 and both side surfaces of the main body case 30. This exhaust hole 38
Communicates with the exhaust port 33B of the electric blower 33 via an exhaust air passage (not shown), and the exhaust port 33B of the electric blower 33
The air exhausted from is exhausted to the outside from the exhaust hole 38 via the exhaust air passage. Also, the body case 3
A battery (not shown) is built in the lower side of the electric blower 33 in the electric drive unit 34 of No. 0.

The lid 40 has a top plate 41 formed in an elliptical shape in a plan view, and a peripheral wall 42 is integrally formed around the top plate 41. A connection pipe 44 having a connection port (suction port) 43 for detachably connecting the dust collecting hose 21 is provided at the front portion of the peripheral wall 42. This connection pipe 4
4 extends in the front-rear direction, and its rear end 45 is open.

As shown in FIGS. 6 to 8, the dust container 50 has a container case having an opening 51 on the rear surface (the end portion on the right side in FIG. 6) and an intake port (air inflow port) 52 on the front surface. It has a body 53 and a handle portion 54 integrally formed under the intake port 52 of the container case body 53.

The container case body 53 has a dust collecting chamber portion (dust collecting portion) 55 formed in the lower portion, a negative pressure chamber portion 56 formed on the dust collecting chamber 55, and a negative pressure chamber portion 56. It has a dust separating portion 60 provided and a guide tube 70 for guiding the dust separated by the dust separating portion 60 to the dust collecting chamber 55.
The container case body 53 has a front wall 53a, and the intake port (air inlet) 52 is formed on the upper side of the front wall 53a. The intake port 52 is open to the negative pressure chamber portion 56.

At the bottom of the dust collecting chamber 55, a bottom plate 57 is attached to the shaft J.
It is attached so as to be openable and closable around it, and by opening the bottom plate 57, dust accumulated in the dust collecting chamber 55 is discarded. Dust chamber 55 and negative pressure chamber 5
An opening 59 is formed as an exhaust port in the top plate 58 of the dust collecting chamber 55 that divides the dust collection chamber 6 into a net filter F1 as an exhaust filter, as shown in FIG. A connection hole 58A is provided after the opening 59 of the top plate 58.
Are formed. A guide wall G for generating a swirling flow in the dust collecting chamber 55 is provided below the connection hole 58A.

Further, the rear wall portion 55A of the dust collection chamber portion 55 is drawn inward from the opening 51 of the container case body 53, and the filter 80 (see FIG. 3) is detachably mounted in the opening 51. It has become.

The opening 59 as an exhaust port is communicated with the intake opening 33A of the electric blower 33 through the negative pressure chamber 56 and the filter 80.

The dust separating portion 60 is provided with a tubular filter 62 having a tubular air passage 61, and an abutting portion 63 provided at the other end opening (air discharging end) 62B of the tubular filter 62. It has an abutting member (cylindrical body). The diameter D1 (see FIG. 3) of the one end opening 62A of the cylindrical filter 62 is formed larger than the diameter d of the intake port (air inlet) 52 of the container case body 53, and the diameter of the other end opening 62B of the cylindrical filter 62. D
2 (see FIG. 3) is formed larger than the diameter of the intake port 52. That is, the diameter d of the intake port (air inlet) 52 is
It is formed smaller than the diameter D2 of the other end opening 62B of the cylindrical filter 62.

Here, when the air containing dust flows into the cylindrical filter 62 from the intake port 52, the air containing dust flows from the one end opening 62A of the cylindrical filter 62 toward the other end opening 62B. Based on the flow, the one end opening 62A of the tubular filter 62 is the upstream end, and the other end opening 62B of the tubular filter 62 is the downstream end. Moreover,
One end opening 62A (upstream end) of the cylindrical filter 62 is in close contact with or fixed to the rear surface of the front wall 53a of the container case body 53 at a portion around the intake port (air inlet) 52.
As a result, the intake port 52 of the container case body 53 and the intake port 52 are located at the one end opening 6A so that the intake port 52 is located inside the one end opening 62A.
2A is connected. The diameter of one end opening 62A (upstream end) of the cylindrical filter 62 is formed larger than that of the intake port 52.

The diameter of the cylindrical filter 62 is linearly gradually reduced from one end (upstream end) to the other end (downstream end). That is, the cylindrical filter 6 of the dust separating section 60.
The diameter of 2 is gradually reduced to a conical tubular shape (tapered tubular shape) as it goes downstream.

Further, the air passage 61 of the tubular filter 62 extends linearly in the front-rear direction, and the connection pipe 44 of the lid 40 is provided.
And the intake port 52 of the container case body 53 and the tubular filter 6
2, the opening 51 of the container case body 53, and the electric blower 33
The intake opening 33A is arranged in a straight line.

As shown in FIG. 6, the tubular filter 62 includes a tubular frame W having a plurality of openings 64, and a mesh net attached to the inner peripheral surface of the tubular frame W. A filter (mesh filter) F2 is provided. This tubular frame W has an annular (circular) frame portion W1 forming an opening 62A on one end, a circular tubular (annular) frame portion W2 forming an opening 62B on the other end, and a frame portion W1. , W2 are provided with a plurality of bar-shaped frame parts (bar-shaped frame parts) W3. The space surrounded by the frame portions W1 to W3 is the opening 64. The openings 64 are provided uniformly over the entire circumference of the tubular filter 62. Also,
The air passage 61 includes the frame portions W1 to W3 and the net filter F2.
It is formed by being surrounded by.

Moreover, the net filter F2 has a cylindrical frame W.
The filter is formed in a tubular shape along the inner peripheral surface of the filter to form a filter tubular portion, and is attached to the tubular frame W by adhesion or fusion so as to cover the plurality of openings 64.

Further, in the cylindrical frame W, the diameter D1 at the upstream end is formed larger than the intake port (air inlet) 52, and the diameter D2 at the downstream end is formed larger than the intake port (air inlet) 52. There is. In other words, the diameter of the intake port (air inlet) 52 is smaller than the diameter of the downstream end of the tubular frame W.

Further, as the net filter F2, for example, a mesh-shaped resin fiber filter having a metal coating layer formed on the surface by sputtering is used, and the net filter F2 is slippery so that dust hardly adheres thereto. still,
Instead of this metal coating layer, the surface of the net filter F2 may be subjected to Teflon (registered trademark) processing or fluorine processing to form a slippery coating layer on the surface of the net filter F2.

Further, the roughness of mesh (opening) Ma of the net filter F2 of the cylindrical filter 62, that is, the opening area of the mesh (mesh) is S1, and the net filter (exhaust filter) attached to the opening 59 as the exhaust port. The roughness of the mesh (opening) Mb of F1, that is, the opening area of the mesh (mesh) is S2.
Then, the opening area S of the mesh of the net filter F2
1 is formed larger than the mesh opening area S2 of the net filter (exhaust filter) F1.

Further, the air volume of the air that has passed through the cylindrical filter 62 and flows into (is sucked into) the negative pressure chamber portion 56 is Q1, and the dust collecting chamber portion (dust collecting portion) 55 and the opening 59 as an exhaust port.
And the air volume of the air that flows into (is sucked into) the negative pressure chamber portion 56 via the net filter F1 is Q2, the air volume Q1 of the air that passes through the net filter F2 of the tubular filter 62 is the dust collection chamber portion (dust collection chamber). Part) 55 net filter F1
It is set to be smaller than the air volume Q2 of the air that passes through. That is, the air volume Q2 is set to be larger than the air volume Q1.

The relationship between the air volumes Q1 and Q2 is the suction capacity of the electric blower 33, the roughness of the mesh of the net filters F1 and F2 (size of the mesh openings), the cross-sectional area and length of each air passage, etc. It is determined by various conditions. However, if the conditions other than the net filters F1 and F2 are fixed and the relationship between the air volumes Q1 and Q2 is constant, the net filter F1 can be used.
It can also be changed depending on the roughness of the meshes of 1 and F2 (size of the openings of the mesh eyes).

The air passage 61 of the cylindrical filter 62 is
It communicates with the intake opening 33A of the electric blower 33 through the opening 64 of the cylindrical filter 62, the negative pressure chamber portion 56 of the container case body 53, and the opening 34A of the electric portion 34 of the main body case 30. Further, the extending direction of the air passage 61 of the tubular filter 62 and the extending direction of the connection pipe 44 of the lid body 40 are in a straight line, and the intake air of the electric blower 33 is drawn in the extending direction of the air passage 61 of the tubular filter 62. The openings 33A face each other.

The abutting portion 63 has a slanted wall portion 63A extending obliquely downward from the upper end of the other end opening 62B of the cylindrical filter 62, and a curved wall extending from one end of the slanted wall portion 63A so as to extend downward and a cylinder. End 62B of the filter 62
And a side wall portion 63C formed on both sides of the inclined wall portion 63A and the abutting wall portion 63B. Further, the abutting portion 63 has an opening 63D joined to the other end opening 62B of the tubular filter 62 and an opening 63E facing downward.

The guide tube 70 extends in the vertical direction and communicates with the inside of the dust collecting chamber 55 through the opening 63E of the abutting portion 63 and the connection hole 58A of the top plate 58. The cylindrical filter 62, the abutting portion 63, and the guide tube 70 are integrally formed and formed separately from the container case body 53, and the top plate of the container case body 53 is adhered or ultrasonically fused. It may be fixed to 58. Further, the abutting portion 63 and the guide tube 70 are integrally formed, and are formed separately from the tubular filter 62 and the container case body 53, and the tubular filter 62 is bonded to the abutting portion 63 and the front wall 53a or The lower end of the guide tube 70 may be fixed to the top plate 58 by adhesion or ultrasonic fusion while being fixed by ultrasonic fusion or the like. [Operation] Next, the operation of the electric vacuum cleaner configured as described above will be described.

First, as shown in FIG. 4, the dust container 50 is placed on the placing portion 35 of the main body case 30, the lid 40 is closed, and the hose 21 is connected to the connection port 43 of the lid 40. Then, when a switch (not shown) of the operation unit 22A is operated, the electric blower 33 is driven. By driving the electric blower 33, the negative pressure chamber portion 56 of the container case body 53 becomes negative pressure through the opening 34A of the main body case 30. This negative pressure causes the opening 64 of the tubular filter 62 and the air passage 6 of the tubular filter 62.
1, acting on the intake port 52 of the container case body 53, the connection pipe 44 of the lid body 40, the hose 21, the extension pipe 23 and the suction port body 24, and the dust is sucked from the suction port body 24 together with the air.

The sucked dust and air are extended by the extension pipe 2.
It is sucked into the connection port 43 of the lid 40 via the hose 3 and the hose 21. The dust and air sucked into the connection port 43 pass through the intake port 52 of the dust collecting container 50 and are sucked into the air passage 61 of the cylindrical filter 62 of the dust separating unit 60.

A part of the air sucked into the air passage 61 is sucked into the negative pressure chamber portion 56 of the container case body 53 through the net filter F2 of the opening 64 of the cylindrical filter 62, and the opening of the container case body 53 is further opened. It is sucked into the air intake opening 33A of the electric blower 33 through the filter 80 attached to 51.

On the other hand, the dust and the remaining air (air) having a mass of a predetermined amount or more sucked into the air passage 61 are in the air passage 6
Since 1 extends linearly in the front-back direction, the air passage 6
1 goes straight on and abuts against the abutting wall portion 63B of the abutting portion 63.

At this time, as for the dust that flows into the air passage 61 from the intake port 52 together with the air (light), the light dust is deflected together with a part of the air on the net filter F2 side, but most of the dust moves substantially straight due to the inertial force. . The dust that is deflected has a relatively small weight and a small inertial energy, but the dust that travels straight has a relatively large weight and a large inertial energy.

For this reason, among the dusts flowing in from the intake port 52 , those that move substantially straight due to the inertial force when flowing into the air passage 61 from the suction port 52 are directed to the downstream end of the net filter (filter cylinder portion) F2. In the event of a collision, dust bites into the mesh (mesh opening) at the downstream end of the net filter F2 due to inertial energy, and the downstream end of this net filter F2 becomes clogged and loses air permeability, and the air permeability is also restored. I can not expect it.

However, in the present embodiment, most of the dust flowing into the air passage 61 from the intake port 52, even at the peripheral portion, goes straight by the inertial energy, and the diameter of the intake port 52 is the same as that of the cylindrical filter 62. Since it is formed smaller than the diameter of the opening 62B that is the downstream end, the dust that travels substantially straight due to the inertial force when flowing into the air passage 61 from the intake port 52 does not hit the downstream end of the filter F2 and hits the abutting portion. The abutting wall portion 63B of 63 is abutted. As a result, the intake port 52
It is possible to prevent the downstream end portion of the net filter (filter cylinder portion) F2 from being clogged by the dust that flows into the air passage 61 from and travels straight.

The dust hitting the abutting wall 63B is deflected downward and then introduced into the dust collecting chamber 55 by the guide tube 70. In this way, the dust separating unit 60 separates a part of the air and the dust, and the separated dust and the remaining air are guided by the guide pipe 70 to the dust collecting chamber 55.
Will be introduced inside.

The air introduced into the chamber 55 becomes a swirl flow by the guide wall G of the dust collecting chamber 55, and the dust introduced into the dust collecting chamber 55 is compressed while the dust collecting chamber 55 is compressed. 55
Accumulate on the bottom side of. Thereafter, the air from which the dust has been separated is sucked into the negative pressure chamber portion 56 of the container case body 53 through the opening 59 of the top plate 58 of the rear dust collection chamber portion 55.

Moreover, the air volume Q1 of the air passing through the net filter F2 is the air volume of the air sucked into the negative pressure chamber section 56 through the guide tube 70, the dust collecting chamber section 55 and the opening (exhaust port). It is set to be less than Q2. Therefore, most of the dust that flows into the tubular filter 12 from the intake port 52 hits the air passage 61 in the tubular filter 62 against the abutting portion 6.
It will flow in a straight line toward the abutting wall portion 63B of No. 3. Thereby, the separation rate of dust in the cylindrical filter 62, that is, the ratio of the dust flowing into the cylindrical filter 62 toward the abutting wall portion 63B without flowing to the net filter F2 side of the cylindrical filter 62. Will be improved. This separation rate improves as the air volume Q2 becomes larger than the air volume Q1.

Further, since the fine dust having a light weight flows on the air passing through the net filter F2 of the opening 64 without going straight through the air passage 61 of the cylindrical filter 62, it adheres to the net filter F2. To go. Then, when the clogging of the net filter F2 becomes large due to the adhesion of fine dust, the air volume passing through the net filter F2 decreases, but the negative pressure of the negative pressure chamber portion 56 of the container case body 53 is correspondingly reduced. Becomes larger, and the negative pressure in the dust collection chamber 55 also becomes larger through the opening 59 of the top plate 58. For this reason, the wind velocity of the air that travels straight in the air passage 61 of the tubular filter 62 increases, and the amount of air that travels straight also increases. And
When the wind speed of the cylindrical filter 62 that travels straight in the air passage 61 increases, the air that travels straight removes the dust adhering to the net filter F2.

By the way, the mesh eye opening (roughness) S1 of the net filter F2 of the tubular filter 62 is set larger than the mesh eye opening (roughness) S2 of the net filter F1. As a result, the work efficiency is improved, that is, the amount of dust sucked into the dust collecting chamber 55 is increased, so that the net filter F2 is less likely to be clogged.

That is, when the air containing dust (air) flows into the cylindrical filter 62 from the intake port (air inlet) 52 as a straight flow, a part of the straight air passes through the net filter F2. Since a large amount of straight-flowing components are left in the negative pressure chamber 56 to help suck air containing dust into the cylindrical filter 62, energy loss due to air passage resistance is reduced. I am trying to become.

Therefore, when the mesh opening S1 of the net filter F2 is made smaller than the mesh opening S2 of the net filter F1, the air permeation resistance in the mesh of the net filter F2 becomes large, and the air flows toward the negative pressure chamber 56 side. It becomes difficult and energy loss occurs due to wind path resistance, which is not preferable.

On the other hand, if the intake air volume is the same, as compared with the case where the diameter of the intake port (air inlet) 52 is the same as or larger than the diameter of the other end opening (air exhaust end) 62B of the cylindrical filter 62, The intake port (air inlet port) 52 has a cylindrical filter 62.
In the present embodiment in which the diameter is set smaller than the diameter of the other end opening (air exhaust end) 62B, the inflow speed of air (dust) and dust flowing into the cylindrical filter 62 is high. In addition to this, the air volume Q1 of the air passing through the net filter F2 is smaller than the air volume Q2 of the air sucked into the negative pressure chamber 56 through the guide tube 70, the dust collection chamber 55 and the opening (exhaust port). Is also set to be less.

Therefore, as in the present embodiment, the mesh opening S1 of the net filter F2 is replaced by the net filter F1.
Even if the size is larger than the mesh opening S2, most of the dust contained in the air goes straight to the dust collection chamber 55 side, and the dust separation rate in the tubular filter 62 improves.

Moreover, as in the present embodiment, the mesh openings S1 of the net filter F2 are connected to the net filter F1.
The mesh permeation resistance of the mesh of the net filter F2 is set to be smaller by making the mesh larger than the mesh opening S2, so that the air flows toward the negative pressure chamber 56 side through the net filter F2. It's getting easier. As a result, the energy loss due to the air passage resistance in the net filter F2 is reduced, and the small air volume Q1
Of the air is effectively caused to flow into the negative pressure chamber portion 56 via the net filter F2 to assist the suction of the air (air) containing dust into the tubular filter 62. The inflow speed of the air and the dust flowing in the inside is kept high without lowering, and the work efficiency (the dust inflow rate into the dust collecting chamber 55) is improved due to the improvement of the dust separation rate in the cylindrical filter 62. Is improved.

Further, due to clogging, the net filter F2
Even if the air volume passing through the
Since the amount of air flowing straight ahead increases, the amount of air sucked by the electric blower 33 is kept constant. Therefore, regardless of the clogging of the net filter F2, it is possible to always suck the dust with a predetermined suction force.

Further, since the swirl flow is not generated in the air passage 61 of the cylindrical filter 62 to separate the dust from the air, the air passage loss in the air passage 61 becomes small. Moreover, when the air is drawn from the air passage 61 of the cylindrical filter 62 through the net filter F2 into the negative pressure chamber portion 56 of the container case body 53, the intake port 52, the cylindrical filter 62, and the opening 51 of the container case body 53. And the intake opening of the electric blower 33
By arranging 33A and 33A in a straight line, the direction of the air flow does not change significantly as shown by arrow Q1 (see FIG. 3), and the air flows almost linearly and is sucked by electric blower 33. Go.

Therefore, the air passage loss is further reduced, and the function of the electric blower 33 can be fully exerted. Further, the connection pipe 44 of the lid 40
And the cylindrical filter 62 are aligned on a straight line, the direction of the air introduced toward the intake port 52 of the container case body 53 is aligned with the extending direction of the cylindrical filter 62. Road loss becomes even smaller.

As described above, in the electric vacuum cleaner according to the embodiment of the present invention, the suction port (the intake port 5) of the vacuum cleaner body 20.
A dust separator 60 which separates dust from air sucked into the suction port provided in a suction air passage leading to the inlet of the electric blower 33 (intake opening 33A) from 2), the air in the dust separator 60 And a dust collecting portion (dust collecting chamber portion 55) for collecting the dust separated from. Moreover, the dust separating unit 60 is provided with the cylindrical filter 62, and the air inlet to the cylindrical filter 62 (in this embodiment, the intake port 52 is the suction port of the cleaner body and the air to the cylindrical filter 62). The cross-sectional area d of the inlet) is smaller than the cross-sectional area D2 of the air discharge end (the other end opening 62B) of the cylindrical filter 62.

According to this structure, the air passage 6 is introduced from the intake port 52.
The dust that travels substantially straight due to the inertial force when flowing into 1 does not hit the downstream end of the cylindrical filter 62. As a result, it is possible to prevent the downstream end portion of the net filter (filter cylinder portion) F2 from being clogged with the dust that flows into the air passage 61 from the intake port 52 and proceeds straight.

Further, in the electric vacuum cleaner according to the embodiment of the present invention, the dust collecting portion (dust collecting chamber portion 55) communicates with the air intake opening ( air intake opening 33A) of the electric vacuum cleaner.
9). Further, the amount Q1 of air passing through the tubular filter 62 is the amount of air flowing to the intake port ( intake opening 33A) of the electric blower 33 through the dust collecting portion (dust collecting chamber 55) and the exhaust port (opening 59). It is set to be less than Q2.

According to this structure, the separation ratio of dust in the tubular filter 62, that is, the dust that has flowed straight into the tubular filter 62 without flowing to the mesh (mesh) side of the tubular filter 62. Will be improved.

Further, in the electric vacuum cleaner according to the embodiment of the present invention, a mesh filter (net filter F2) is used as the cylindrical filter 62, and the exhaust port (opening 5) is used.
9) A mesh-shaped exhaust filter (net filter F)
1) is attached and the cylindrical filter 6 is attached.
The opening area S1 of the second mesh is set to be larger than the opening area S2 of the mesh of the exhaust filter (net filter F1).

According to this structure, the work efficiency is improved as described above, that is, the amount of air sucked into the dust collecting chamber (dust collecting chamber portion) 55 is large, so that the net filter F2 is less likely to be clogged. .

[0062]

As described above, according to the present invention, the air passage loss can be reduced .

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of an electric vacuum cleaner according to the present invention.

FIG. 2 is a perspective view showing a cleaner body of the electric vacuum cleaner shown in FIG.

FIG. 3 is a side view showing a cross section of a part of the cleaner body shown in FIG.

FIG. 4 is a side view of the cleaner body showing a state in which a lid is opened.

FIG. 5 is a perspective view showing a cleaner body.

FIG. 6 is a vertical cross-sectional view showing the structure of a dust container.

FIG. 7 is a perspective view showing the dust container in a state where the mesh portion is removed from the conical frame of the net filter.

FIG. 8 is a plan sectional view showing a structure of a dust container.

FIG. 9 is an explanatory diagram showing a configuration of a conventional electric vacuum cleaner.

[Explanation of symbols]

20 ... Vacuum cleaner body 33 ... Electric blower 33A ... Intake opening 52 ... Intake port (suction port) 55 ... Dust collection chamber part (dust collection part) 59 ... Opening (exhaust port ) 60 ... Dust separation part 62 ... Cylindrical filter 62B ... Other end opening (air discharge end)

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hitoshi Suzuki 43 Horiyamashita, Hadano City, Kanagawa Prefecture Toshiba Tech Co., Ltd., Hadano Plant (56) Reference JP-A-52-99651 (JP, A) −41815 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 9/16

Claims (3)

(57) [Claims] 1. An air blower for an electric blower from a suction port of a cleaner body.
A dust separator for separating the dust from the air that is formed in the suction air path up to the opening <br/> provided to the negative pressure chamber portion is sucked into the suction port is partitioned with the negative pressure chamber unit An electric vacuum cleaner comprising: a dust collecting part that guides and collects the dust separated from the air by the dust separating part , wherein the dust separating part has an air passage formed therein and an upstream end. From
Equipped with a cylindrical filter whose diameter gradually decreases toward the downstream end.
For example, the air flow formed smaller than the sectional area of the cross-sectional area the air discharge end of the tubular filter at the entrance to the tubular filter
And the intake opening of the electric blower has the cylindrical filter.
If it is located on the opposite side of the
In addition, air flows through the tubular filter to the electric blower.
An electric vacuum cleaner, characterized in that, while being sucked into an intake opening , dust traveling straight in an air passage of the tubular filter is guided by the guide tube and collected in the dust collecting portion. 2. The suction of the electric blower from the suction port of the cleaner body
Inside the negative pressure chamber formed in the suction air passage leading to the opening
Dust is separated from the air that is installed and sucked into the suction port.
The dust separating section which is separated from the negative pressure chamber section is separated from the dust.
Touch the dust separated from the air in the separation
An electric vacuum cleaner comprising: a dust collecting portion for collecting the dust, wherein the dust separating portion has an air passage formed therein and from an upstream end.
Equipped with a cylindrical filter whose diameter gradually decreases toward the downstream end.
The cross-sectional area of the air inlet to the tubular filter is
Formed smaller than the cross-sectional area of the air discharge end of the filter.
And the intake opening of the electric blower has the cylindrical filter.
If it is located on the opposite side of the
In addition, air flows through the tubular filter to the electric blower.
While being sucked into the intake opening, the air passage of the cylindrical filter
Dust that travels straight in the direction of contact with the abutting part
An electric vacuum cleaner characterized by being collected by . 3. The suction of the electric blower from the suction port of the cleaner body
Provided in the suction air passage leading to the opening,
This is a dust separating part that separates the dust from the sucked air.
Is installed below the dust separation part of the
Cleaning with a dust collecting part for collecting dust separated from the
In the machine, the dust separating section has an air passage formed inside and is separated from the upstream end.
Equipped with a cylindrical filter whose diameter gradually decreases toward the downstream end.
The cross-sectional area of the air inlet to the tubular filter is
Formed smaller than the cross-sectional area of the air discharge end of the filter.
And the intake opening of the electric blower has the cylindrical filter.
If it is located on the opposite side of the
In addition, air flows through the tubular filter to the electric blower.
While being sucked into the intake opening, the air passage of the cylindrical filter
An electric vacuum cleaner, characterized in that the dust that travels straight through is collected in the dust collecting portion .