JP3460833B1 - Electric vacuum cleaner - Google Patents

Abstract

[PROBLEMS] To easily remove fine dust adhering to a filter,
Provided is a vacuum cleaner capable of preventing a reduction in suction efficiency. SOLUTION: A connection port (suction port) 43 of a cleaner body 20.
Intake 33 of electric blower 33 for sucking dust from
A dust separating unit 60 for separating air and dust sucked from the suction port 43 in the air path to A, and a dust collecting chamber (dust collecting unit) for collecting the dust separated by the dust separating unit 60 5
5 is a vacuum cleaner comprising:
A cylindrical tube (passage) 6 whose one end opening 62A communicates with the suction port 43 and whose rear end opening 62B communicates with the dust collection chamber 55.
2, an opening 64 provided in the peripheral wall of the passage 62, and a net filter (first filter) F2 attached to the opening 64. The opening 64 in the peripheral wall communicates with the intake port 33A of the electric blower 33. A communication air passage (negative pressure chamber portion) 56 is provided, and a ventilation opening 59 communicating with the negative pressure chamber portion 56 is provided on a wall defining the dust collecting portion 55.

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 provided with a dust separating portion for separating sucked dust and a dust collecting portion for collecting dust.

[0002]

2. Description of the Related Art As a conventional vacuum cleaner, a cyclone vacuum cleaner shown in FIG. 8 is known (for example, refer to Patent Document 1).

Such an electric vacuum cleaner has an upper opening 1a at the top.
The dust cup 1 is formed with an electric blower 2 for making the inside of the dust cup 1 a negative pressure. A filter 3 is detachably attached to the upper opening 1a of the dust cup 1, and an intake port 4 is formed in the peripheral wall 1b. The upper opening 1a communicates with the electric blower 2 and the intake port 4
Communicates with a suction port body 5 for sucking dust via an intake passage 6.

The dust sucked from the suction port body 5 is sucked into the dust cup 1 from the suction port 4 of the dust cup 1 through the suction passage 6. A swirling flow is generated in the dust cup 1 to separate dust and air, and only air is sucked by the electric blower 2 from the upper opening 1a of the dust cup 1 and exhausted to the outside. At this time, fine dust not separated in the dust cup 1 was attached to the filter 3 attached to the upper opening 1a.

[0005]

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

[0006]

By the way, in such an electric vacuum cleaner, in order to remove fine dust adhering to the filter 3, the filter 3 is placed in the upper opening 1 of the dust cup 1.
It was removed from a and this filter 3 was washed. Therefore, there is a problem that it is necessary to wash the filter 3 regularly, which is troublesome.

Further, since fine dust that has adhered to the filter 3 is not removed until it is washed, there is a problem that if it is not washed regularly, it will gradually become clogged and the suction efficiency will decrease.

The present invention has been made in view of the above problems, and easily removes fine dust adhering to a filter,
An object of the present invention is to provide an electric vacuum cleaner that can prevent a decrease in suction efficiency.

[0009]

In order to achieve the above object, an electric vacuum cleaner of the present invention has a negative pressure chamber portion formed in an air passage extending from a suction port of a cleaner body to an intake port of an electric blower.
A dust separation unit that is provided inside and separates air and dust sucked from the suction port, and a dust collection unit that is separated from the negative pressure chamber unit and that collects the dust separated by the dust separation unit. In the part, one end opening communicates with the suction port and the other end opening connects the guide tube.
Has a tubular passage that communicates with the dust collecting portion via the first filter on the peripheral surface, sucks the air in the passage into the electric blower through the first filter, and removes the dust in the passage from the passage. An electric vacuum cleaner that collects dust from the other end opening through a guide tube to a dust collecting section, and an upper wall that partitions and forms the dust collecting section,
A ventilation opening is provided which penetrates the upper wall in the vertical direction and communicates with the intake port of the electric blower, and the ventilation opening has a second filter.
It is characterized by installing .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments 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 4, the cleaner body 20 includes a body case 30, a dust collecting container (dust cup) 50 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.
5 and 5 sandwich and fix the dust collecting container 50.

The front surface of the electric section 34 is opened, and a frame (not shown) for pressing a filter 80 described later is radially provided in the opening 34A. Opening 34A
Is opposed to and communicates with the intake port 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 through an exhaust air passage (not shown), and the exhaust port 33 of the electric blower 33
The air exhausted from B is exhausted to the outside from the exhaust hole 38 via the exhaust air passage. Further, a battery (not shown) is built in the electric section 34 of the main body case 30 below the electric blower 33.

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. 5 to 7, the dust container 50 has a container case body 53 having an opening 51 on the rear surface (right side in FIG. 5) and an intake port 52 on the front surface, and this container case body. It has a grip portion 54 integrally formed under the intake port 52 of 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 (communicating air passage) 56 formed on the dust collecting chamber portion 55, and the negative pressure chamber portion. It has a dust separating portion 60 provided in the pressure chamber portion 56, and a guide tube 70 for guiding the dust separated by the dust separating portion 60 to the dust collecting chamber portion 55. Here, the dust collecting chamber portion 55 is provided at a lower position of the dust separating portion 60.

The bottom plate 5 is attached to the bottom of the dust collecting chamber 55.
7 is attached so as to be openable and closable around the axis J, and by opening the bottom plate 57, the dust accumulated in the dust collecting chamber 55 is discarded.

Further, a top plate (upper wall) 58 of the dust collecting chamber 55 which divides the dust collecting chamber 55 and the negative pressure chamber 56 is formed with a ventilation opening 59 penetrating in the vertical direction. The dust chamber 55 and the negative pressure chamber 56 are communicated with each other. A net filter (second filter) F1 is attached to the ventilation opening 59 as shown in FIG.

Behind the ventilation opening 59 of the top plate 58, there is formed a connection hole 58A to which the lower end of the guide tube 70 is integrally connected. A guide wall G for generating a swirling flow in the dust collecting chamber 55 is provided below the connection hole 58A.

The rear wall portion 55A of the dust collecting chamber portion 55 is drawn inward from the opening 51 of the container case body 53,
A filter 80 (see FIG. 3) is detachably mounted in the opening 51.

The dust separating portion 60 has a pipe portion (passage) 62 having a tubular air passage 61, and an opening 62 at the other end of the pipe portion 62.
It has an abutting portion 63 provided on the B side. The diameter of the one end opening 62A of the pipe portion 62 is formed to be larger than the diameter of the intake port 52 of the container case body 53, and the intake port 52 of the container case body 53 is located in the one end opening 62A of the pipe portion 62. It is connected to the. Further, the other end opening 6 of the pipe portion 62
The diameter of 2B is set to be substantially the same as the diameter of the intake port 52 of the container case body 53, and the diameter of the pipe portion 62 is linearly gradually reduced from one end to the other end. The diameter of the other end opening 62B of the pipe portion 62 may be smaller than the diameter of the intake port 52.

The air passage 61 of the pipe portion 62 extends linearly in the front-rear direction, and includes the connecting pipe 44 of the lid 40, the intake port 52 of the container case body 53, the pipe portion 62, and the container case body. The opening 51 of 53 and the air inlet 33A of the electric blower 33 are arranged in a straight line.

Further, a plurality of openings 6 are formed on the peripheral wall of the tube portion 62.
4 are evenly provided over the entire circumference.
As shown in FIG. 5 , a net filter (first filter) F2 is attached to the.

Here, the tube portion 62 includes circular frame members W1 and W.
2 and a plurality of frame bodies W3 that connect the frame bodies W1 and W2, and the opening 64 is a space surrounded by the frame bodies W1 to W3. The air passage 61 is formed so as to be surrounded by the frame body W3.

The air passage 61 of the pipe portion 62 is
Through the opening 64, the negative pressure chamber portion 56 of the container case 53, and the opening 34A of the electric portion 34 of the main body case 30 to communicate with the intake port 33A of the electric blower 33.

That is, the negative pressure chamber portion 56 has the dust separating portion 60.
Is provided between the opening 64 and the intake port 33A of the electric blower 33.

The direction in which the air passage 61 of the pipe portion 62 extends and the direction in which the connecting pipe 44 of the lid 40 extends are aligned with each other, and the electric blower 33 extends in the direction in which the air passage 61 of the pipe portion 62 extends. Intake port 33A faces each other.

The abutting portion 63 is the other end opening 62 of the pipe portion 62.
Inclined wall portion 63A extending obliquely downward from the upper portion of B
And an abutting wall portion 63B that is curved from one end of the inclined wall portion 63A and extends downward and faces the other end opening 62B of the pipe portion 62, and is formed on both sides of the inclined wall portion 63A and the abutting wall portion 63B. And a side wall portion 63C. Further, the abutting portion 63 has an opening 63D joined to the other end opening 62B of the tube portion 62 and an opening 63E facing downward.

The guide tube 70 extends in the vertical direction and connects the dust separating portion 60 and the dust collecting chamber portion 55 through the opening 63E of the abutting portion 63 and the connecting hole 58A of the top plate 58.

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 this 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 is applied to the opening 6 of the pipe 62.
4, the air passage 61 of the pipe portion 62, the intake port 5 of the container case body 53
2, connection pipe 44 of lid 40, hose 21, extension pipe 2
3 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 pipe portion 62 of the dust separating unit 60.

The air sucked into the air passage 61 passes through the net filter F2 of the opening 64 of the pipe portion 62 and the container case body 5
3 is sucked into the negative pressure chamber 56.

Further, a part of the air sucked into the air passage 61 passes through the abutting portion 63 and the guide tube 70, and the dust collecting chamber portion 5
The air introduced into the dust collection chamber 5 is swirled by the guide wall G of the dust collection chamber 55, and the dust introduced into the dust collection chamber 55 is compressed.

Then, the air introduced into the dust collecting chamber 55 becomes a swirling flow, and the negative pressure chamber of the container case body 53 passes through the ventilation opening 59 of the top plate 58 of the rear dust collecting chamber 55. 56 is sucked.

In this way, the air exhausted through the opening 64 and the air exhausted through the ventilation opening 59 join together in the negative pressure chamber portion 56. Then, it is further sucked into the intake port 33A of the electric blower 33 through the filter 80 attached to the opening 51 of the container case body 53.

On the other hand, the dust having a mass larger than a predetermined value, which is sucked into the air passage 61 of the pipe portion 62, projects straightly through the air passage 61 because the air passage 61 extends linearly in the front-rear direction. It abuts against the abutting wall portion 63B of the abutting portion 63 and is introduced into the dust collecting chamber portion 55 by the guide tube 70. That is, the dust separating unit 60 separates air and dust.

Further, the fine dust, which is light in weight, is stored in the pipe portion 62.
The air flows through the net filter F2 of the opening 64 without flowing straight in the air passage 61, and thus adheres to the net filter F2.

When the clogging of the net filter F2 increases due to the adhesion of fine dust, the air volume passing through the net filter F2 decreases. At this time, the negative pressure in the negative pressure chamber portion 56 of the container case body 53 becomes large relative to the reduced air volume. Therefore, the negative pressure in the dust collecting chamber 55 communicating with the negative pressure chamber 56 through the ventilation opening 59 of the top plate 58 also increases. As a result, the wind velocity of the air that travels straight in the air passage 61 of the pipe portion 62 increases, and the amount of air that travels straight increases.

When the velocity of the air flowing straight in the air passage 61 of the pipe portion 62 increases, the air moving straight removes the dust adhering to the net filter F2. At this time, the pipe portion 62
Since the diameter of the air filter gradually decreases linearly toward the opening 62B, the air passage 61 is formed on the entire surface of the net filter F2.
The wind that travels straight through is easily hit uniformly, so that the dust attached to the net filter F2 is easily peeled off.

The separated dust is introduced and accumulated in the dust collecting chamber 55 through the abutting portion 63 and the guide tube 70. Thus, when the net filter F2 is clogged to a predetermined amount, the fine dust attached to the net filter F2 is peeled off by the air flowing through the air passage 61 and can be easily removed. Further, since the clogging of the net filter F2 is eliminated, it is possible to prevent the suction efficiency from decreasing.

Further, due to clogging, the net filter F2
Even if the amount of air passing through the air passage decreases, the amount of air flowing straight in the air passage 61 of the pipe portion 62 increases, so that the amount of air sucked by the electric blower 33 is kept constant. Therefore, regardless of the clogging of the net filter F2, the dust can always be sucked with a predetermined suction force, and the suction efficiency can be further prevented from lowering.

Further, since the dust collecting chamber 55 is provided below the dust separating unit 60 and the suction port 59 is provided on the top plate 58 of the dust collecting unit 55, the dust collecting chamber 55 and the negative pressure chamber are provided. Part 5
A ventilation opening 59 communicating with 6 penetrates the top plate 58 in the vertical direction. As a result, the dust attached to the net filter F1 attached to the ventilation opening 59 falls downward due to its own weight and is accumulated in the dust collection chamber 55. Further, the dust attached to the net filter F1 can be easily removed, clogging is less likely to occur, and a decrease in suction efficiency can be prevented.

[0047]

According to the present invention, it is possible to provide an electric vacuum cleaner which can easily remove fine dust adhering to a filter and prevent a decrease in suction efficiency.

[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 vertical cross-sectional view showing the structure of a dust container.

FIG. 6 is a perspective view showing a dust container.

FIG. 7 is a plan sectional view showing a structure of a dust container.

FIG. 8 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 port 43 Suction port (connection port) 55 Dust collector (dust collector) 56 Open air passage (negative pressure chamber) 59 ventilation openings 60 Dust separator 62 passages (pipe section) 62A Open at one end 62B Other end opening 64 openings F1 second filter (net filter) F2 1st filter (net filter)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Suzuki 43 Horiyamashita, Hadano City, Kanagawa Prefecture Toshiba Tech Co., Ltd. Inside the Hadano Plant (72) Ikuo Oshima 43 Horiyamashita, Hadano City, Kanagawa Prefecture Toshiba Tech Co., Ltd. In the Hadano Plant (72) Inventor Yutaka Maeda 43 Horiyamashita, Hadano City, Kanagawa Prefecture Toshiba Tech Co., Ltd. In the Hadano Plant (56) Reference JP-A-52-99651 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) A47L 9/12 A47L 9/16

Claims (3)

(57) [Claims] 1. A dust separating unit provided in a negative pressure chamber formed in an air passage extending from a suction port of a cleaner body to an intake port of an electric blower for separating air and dust sucked from the suction port. And a dust collecting part that is separated from the negative pressure chamber part and collects the dust separated by the dust separating part, wherein the dust separating part has one end opening communicating with the suction port and the other end opening guiding. It has a cylindrical passage communicating with the dust collecting portion via a pipe and having a first filter formed on the peripheral surface, and sucks the air in the passage into the electric blower via the first filter, and An electric vacuum cleaner that collects dust in a passage from the other end opening of the passage to the dust collecting portion through the guide tube , wherein the upper wall that defines and forms the dust collecting portion is the upper wall and the lower wall. Person
An electric vacuum cleaner having a ventilation opening penetrating in the same direction and communicating with the intake port of the electric blower, and having a second filter attached to the ventilation opening. 2. A dust separator for separating air and dust sucked from the suction port in a negative pressure chamber formed in an air passage extending from the suction port of the cleaner body to the intake port of the electric blower. And a dust collecting part that is separated from the negative pressure chamber part and collects the dust separated by the dust separating part, wherein the dust separating part has one end opening communicating with the suction port and the other end opening A cylindrical passage communicating with the dust collecting portion and having a first filter formed on its peripheral surface, and a protrusion facing the other end opening.
A contact wall portion , sucking air in the passage into the electric blower through the first filter, and dust in the passage from the other end opening of the passage to the abutment wall portion to collect dust. An electric vacuum cleaner to be introduced into a part of the dust collecting section, wherein the upper wall that defines and forms the dust collecting section has an upper wall and a lower wall.
An electric vacuum cleaner having a ventilation opening penetrating in the same direction and communicating with the intake port of the electric blower, and having a second filter attached to the ventilation opening. 3. A dust separating section for separating air and dust, which is provided in the air passage extending from the suction port of the cleaner body to the suction port of the electric blower, to separate the air sucked from the suction port, and the dust collecting separation unit.
A dust collecting portion provided below and collecting dust separated by the dust separating portion, wherein the dust separating portion has one end opening communicating with the suction port and the other end opening communicating with the dust collecting portion. And a cylindrical passage having a first filter formed on the peripheral surface thereof, the air in the passage is sucked into the electric blower via the first filter, and the dust in the passage is opened at the other end of the passage. introduced emptied dust collecting unit a vacuum cleaner for dust collection, the top wall defining a said dust collecting section, a vertical direction the top wall
An electric vacuum cleaner having a ventilation opening penetrating in the same direction and communicating with the intake port of the electric blower, and having a second filter attached to the ventilation opening.