JP2004113778A - Electric vacuum cleaner - Google Patents

Abstract

To provide an electric vacuum cleaner capable of reducing air path loss and not reducing the air volume even when dust accumulates.
A dust separating unit provided in an air passage from a suction port of a cleaner main body to an intake opening of an electric blower for separating dust, and collecting the dust separated by the dust separating unit. A dust collecting chamber 55 for dusting and an air inlet 52 for introducing air from the suction port 43 to the dust separating unit 60 are provided, and communicate between the dust separating unit 60 and the electric blower 33 to an intake opening 33A of the electric blower 33. The dust separating portion 60 includes a cylindrical passage 62 in which one end opening 62 </ b> A communicates with the air inlet 52 and the other end opening 62 </ b> B communicates with the dust collection chamber 55, A net filter F2 formed on the peripheral surface of the cylindrical passage 62; the opening is arranged on the side opposite to the intake port 52 with respect to the passage 62; Provided.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vacuum cleaner having a dust separating unit for separating sucked dust and a dust collecting unit for collecting dust.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a cyclone-type vacuum cleaner shown in FIG. 10 is known (for example, see Patent Document 1).
[0003]
Such a vacuum cleaner includes a dust cup 1 having an open upper part, an electric blower 2 for reducing the pressure inside the dust cup 1, and the like. An intake port 3 is formed in a peripheral wall 1A of the dust cup 1, and the intake port 3 communicates with a suction port body 4 for sucking dust through an intake path 5.
[0004]
Then, 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 via the suction passage 5. A swirling flow is generated in the dust cup 1 to separate dust and air, and only air is sucked into the electric blower 2 from an upper opening of the dust cup 1 and exhausted to the outside.
[0005]
[Patent Document 1]
JP 2001-104223 A (paragraphs 38 and 45, FIG. 2)
[0006]
[Problems to be solved by the invention]
By the way, in such a vacuum cleaner, the air sucked upward through the intake passage 5 is turned by 90 degrees and enters the dust cup 1 through the intake port 3, where it becomes a swirling flow. Then, the dust cup 1 is rotated along the peripheral wall 1 </ b> A, and thereafter only the air is sucked upward by the electric blower 2. By changing the direction of the air flow twice, the air path loss of the air is large, and after the air rotates in the dust cup 1, it is sucked into the electric blower 2. The road loss becomes very large, and there is a problem that the capacity of the electric blower cannot be sufficiently exhibited.
[0007]
In a normal vacuum cleaner in which a paper pack as a paper filter is mounted in a dust collection chamber, the air path loss does not increase because the intake port, the paper pack, and the electric blower are arranged in a straight line. However, when dust accumulates in the paper pack, there is a problem that the air volume drops extremely.
[0008]
It is an object of the present invention to provide a vacuum cleaner capable of reducing wind path loss and not reducing the air volume even when dust accumulates.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a dust separating section provided in an air passage from a suction port of a cleaner body to an intake opening of an electric blower for separating dust, A dust collecting portion for collecting dust, and an air inlet for introducing air from the suction port to the dust separating portion, and communicating with an air intake opening of the electric blower between the dust separating portion and the electric blower. A vacuum cleaner having an opening,
The dust separating section includes a cylindrical passage having one end opening facing the intake port and the other end opening communicating with the dust collecting portion, and a filter formed on a peripheral surface of the cylindrical passage. Prepare,
The opening is arranged on the side opposite to the intake port with respect to the passage, and the dust collecting portion is provided below the passage.
[0010]
According to a second aspect of the present invention, the dust separating section has a cylindrical passage having one end opening facing the intake port located on the front side thereof and the other end opening communicating with the dust collecting portion. A filter formed on the peripheral surface of the passage of
The opening is disposed on the rear side of the passage, and the dust collecting portion is provided below the passage.
[0011]
Embodiment
Hereinafter, an embodiment of a vacuum cleaner according to the present invention will be described with reference to the drawings.
[0012]
First, the principle of the present invention will be briefly described with reference to FIG.
[0013]
In FIG. 9, reference numeral 100 denotes a suction port for sucking dust, and a dust separation unit 101 is provided between the suction port 100 and the electric blower 107. 107A is an intake port of the electric blower.
[0014]
The dust separating portion 101 includes a tube portion 102 that extends in a straight line and forms a cylindrical passage 102S having a constant cross-sectional area, and a contact portion 103 provided at the other end opening 102A of the tube portion 102. I have. The butting portion 103 is formed of a pipe that communicates with the pipe portion 102 and protrudes downward. A dust collecting chamber 104 is formed below the abutting portion 103, and the dust collecting chamber 104 and the pipe 102 communicate with each other via the abutting portion 103. Then, the suction port 100, the pipe section 102, and the electric blower 107 are arranged on a straight line. Further, one end opening 102 </ b> B of the pipe portion 102 communicates with the suction port 100.
[0015]
A plurality of openings 102H are formed in the peripheral wall of the tube portion 102. The dust separating unit 101 is covered by a case 105, and an electric blower 107 is attached to the case 105, and the inside of the case 105 is set to a negative pressure by the electric blower 107.
[0016]
Now, when the inside of the case 105 becomes a negative pressure due to the driving of the electric blower 107, the negative pressure acts on the passage 102 </ b> S in the pipe 102 through the opening 102 </ b> H of the pipe 102, and the dust is sucked from the suction port 100 together with air. Will be done. The air and dust sucked from the suction port 100 go straight through the passage 102S in the pipe portion 102, and the air is sucked into the case 105 through the opening 102H on the way.
[0017]
On the other hand, the dust having a mass equal to or larger than a predetermined value proceeds straight as it is by inertia, hits the wall 103A of the abutting portion 103, falls into the dust collecting chamber 104, and accumulates in the dust collecting chamber 104.
[0018]
As described above, dust and air are separated even if no swirling flow occurs in the passage 102S, so that the air path loss in the passage 102S is small. In addition, the air sucked into the opening 107A greatly changes the direction of the air flow as shown by the arrow P because the suction port 100, the pipe portion 102, and the electric blower 107 are arranged in a straight line. And flows almost linearly and is sucked into the electric blower 107. For this reason, the whole air path loss is further reduced, and the function of the electric blower 107 can be sufficiently exhibited.
[0019]
According to this principle, a plurality of openings 102H are provided in the tube portion 102, but one opening 102H may be provided.
[0020]
Next, an embodiment of a vacuum cleaner to which the principle of the present invention is applied will be described with reference to the drawings.
[0021]
In FIG. 1, reference numeral 20 denotes a cleaner main body. One end of a hose 21 is detachably connected to the cleaner main body 20, and a hand operation tube 22 is provided at the other end. An extension tube 23 is detachably connected to the hand operation tube 22, and a suction port 24 is detachably connected to a distal end portion of the extension tube 23. An operation unit 22A is provided in the hand operation tube 22, and an operation switch (not shown) is provided in the operation unit 22A.
[0022]
As shown in FIGS. 2 to 5, the cleaner main body 20 includes a main body case 30, a dust collection container (dust cup) 50 detachably mounted on the main body case 30, and a rear portion hinged to the main body case 30. And a lid 40 that can be opened and closed in the vertical direction.
[0023]
The main body case 30 has an electric unit 34 having a built-in electric blower 33, and a dish-shaped mounting part 35 protruding forward is provided at a lower part of the front surface of the electric unit 34. The dust collecting container 50 is detachably mounted on the mounting portion 35, and the lid 40 and the mounting portion 35 sandwich and fix the dust collecting container 50 when the lid 40 is closed. Has become.
[0024]
Further, a front surface of the electric unit 34 is opened, and a frame 34b for pressing a filter 80 described later is radially provided in the opening 34A. The opening 34A faces and communicates with the intake opening 33A of the electric blower 33.
[0025]
A bulging portion 36 is formed on both sides of the main body case 30 from a front upper portion to a rear lower portion, and the lower portion of the bulging portion 36 holds a rear wheel 37 rotatably. Further, a plurality of exhaust holes 38 are formed in front of the bulging portion 36 and both side surfaces of the main body case 30. The exhaust hole 38 communicates with an exhaust port 33B of the electric blower 33 via an exhaust air path (not shown), and air exhausted from the exhaust port 33B of the electric blower 33 is discharged from the exhaust hole 38 via the exhaust air path. To be exhausted. Further, a battery (not shown) is built in the electric unit 34 of the main body case 30 below the electric blower 33.
[0026]
The lid body 40 has a top plate 41 formed in a substantially elliptical shape in plan view, and a peripheral wall 42 is integrally formed around the top plate 41. At the front of the peripheral wall 42, a connection pipe 44 having a connection port (suction port) 43 for detachably connecting the dust collection hose 21 is provided. The connection pipe 44 extends in the front-rear direction, and its rear end 45 is open.
[0027]
As shown in FIGS. 6 to 8, the dust collecting container 50 has a container case body 53 having an opening 51 on the rear surface (right side in FIG. 6) and an air inlet 52 on the front surface, and an air inlet of the container case body 53. And a handle portion 54 integrally formed underneath.
[0028]
The container case body 53 is provided in a dust collecting chamber portion (dust collecting portion) 55 formed in a lower portion, a negative pressure chamber portion 56 formed on the dust collecting chamber 55, and provided in the negative pressure chamber portion 56. It has a dust separating section 60 and a guide tube 70 for guiding the dust separated by the dust separating section 60 to the dust collecting chamber 55.
[0029]
A bottom plate 57 is attached to the bottom of the dust collection chamber 55 so as to be openable and closable about the axis J. When the bottom plate 57 is opened, dust accumulated in the dust collection chamber 55 is discarded. I have. An opening 59 is formed in the top plate 58 of the dust collection chamber section 55 that partitions the dust collection chamber section 55 and the negative pressure chamber section 56, and a net filter F1 is attached to the opening 59 as shown in FIG. I have. A connection hole 58A is formed behind the opening 59 of the top plate 58. A guide wall G for generating a swirling flow in the dust collection chamber 55 is provided below the connection hole 58A.
[0030]
Further, 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, and a filter 80 (see FIG. 3) is detachably mounted in the opening 51. I have.
[0031]
The dust separating section 60 has a tube portion 62 having a tubular air passage 61 formed therein, and a contact portion 63 provided at the other end opening 62B of the tube portion 62. The diameter of the one end opening 62A of the pipe part 62 is formed larger than the diameter of the intake port 52 of the container case body 53, and the one end opening 62A of the pipe part 62 and the intake port 52 of the container case body 53 are arranged such that the intake port 52 is inward. It is connected to be located. The diameter of the other end opening 62B of the tube portion 62 is set to be substantially the same as the diameter of the intake port 52, and the diameter of the tube portion 62 gradually decreases linearly from one end to the other end. The diameter of the other end opening 62 </ b> B of the pipe 62 may be smaller than the diameter of the intake port 52.
[0032]
The air passage 61 of the pipe portion 62 extends linearly in the front-rear direction, and includes the connection pipe 44 of the lid 40, the intake port 52 of the container case body 53, the pipe portion 62, and the opening of the container case body 53. 51 and the intake opening 33A of the electric blower 33 are arranged on a straight line.
[0033]
Further, a plurality of openings 64 are provided uniformly on the peripheral wall of the tube portion 62 over the entire circumference, and a net filter F2 is attached to the openings 64 as shown in FIG. Here, the pipe portion 62 is constituted by circular frames W1, W2 and a plurality of frames W3 connecting the frames W1, W2, and the opening 64 is a space surrounded by the frames W1 to W3. I have. The air passage 61 is formed so as to be surrounded by the frame W3.
[0034]
The air passage 61 of the pipe 62 is connected to the intake opening 33A of the electric blower 33 through the opening 64 of the pipe 62, the negative pressure chamber 56 of the container case body 53, and the opening 34A of the motor 34 of the main body case 30. Communicating. The direction in which the air passage 61 of the pipe 62 extends and the direction in which the connecting pipe 44 of the lid 40 extends are linear, and the intake opening 33A of the electric blower 33 extends in the direction in which the air passage 61 of the pipe 62 extends. Are facing each other.
[0035]
The abutting portion 63 includes an inclined wall portion 63A extending obliquely downward from an upper portion of the other end opening 62B of the tube portion 62, a curved portion extending from one end of the inclined wall portion 63A, and extending downward. It has an abutting wall 63B facing the end opening 62B, and side walls 63C formed on both sides of the inclined wall 63A and the abutting wall 63B. The abutting portion 63 has an opening 63D joined to the other end opening 62B of the tube portion 62 and has an opening 63E facing downward.
[0036]
The guide tube 70 extends in the up-down direction and communicates with the inside of the dust collection chamber 55 via the opening 63E of the abutting portion 63 and the connection hole 58A of the top plate 58.
[motion]
Next, the operation of the vacuum cleaner configured as described above will be described.
[0037]
First, as shown in FIG. 4, the dust collection container 50 is placed on the placement 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. 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 in the negative pressure chamber 56 of the container case body 53 is reduced through the opening 34A of the main body case 30. This negative pressure acts on the opening 64 of the pipe 62, the air passage 61 of the pipe 62, the intake 52 of the container case 53, the connection pipe 44 of the lid 40, the hose 21, the extension pipe 23, and the suction port 24. Then, dust is sucked from the suction port body 24 together with air.
[0038]
The sucked dust and air are sucked into the connection port 43 of the lid 40 via the extension pipe 23 and the hose 21. The dust and air sucked into the connection port 43 pass through the air inlet 52 of the dust collection container 50 and are sucked into the air passage 61 of the pipe 62 of the dust separating unit 60.
[0039]
The air sucked into the air passage 61 is sucked into the negative pressure chamber 56 of the container case body 53 via the net filter F2 of the opening 64 of the tube part 62, and further the filter 80 attached to the opening 51 of the container case body 53 is removed. The air is then sucked into the intake opening 33A of the electric blower 33.
[0040]
On the other hand, the dust having a mass equal to or more than a predetermined amount sucked into the air passage 61 of the pipe portion 62 travels straight through the air passage 61 and collides with the abutting portion 63 because the air passage 61 extends linearly in the front-rear direction. And is introduced into the dust collecting chamber 55 by the guide tube 70. That is, air and dust are separated by the dust separating unit 60.
[0041]
In addition, a part of the air is introduced into the dust collecting chamber 55 through the abutting portion 63 and the guide tube 70, and the introduced air is swirled by the guide wall G of the dust collecting chamber 55 to generate dust. The dust introduced into the chamber 55 is accumulated while being compressed by the swirling flow.
[0042]
After the air introduced into the dust collecting chamber 55 becomes a swirling flow, it is sucked into the negative pressure chamber 56 of the container case body 53 through the opening 59 of the top plate 58 of the dust collecting chamber 55. .
[0043]
The fine dust having a small 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 pipe portion 62, 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 amount of air passing through the net filter F2 decreases. However, the negative pressure of the negative pressure chamber 56 of the container case body 53 is reduced by the reduced amount. And the negative pressure in the dust collection chamber 55 via the opening 59 of the top plate 58 also increases. For this reason, the wind speed of the air traveling straight through the air passage 61 of the pipe portion 62 increases, and the amount of air traveling straight also increases.
[0044]
When the wind speed that goes straight through the air passage 61 of the pipe portion 62 increases, the air that goes straight removes dust adhering to the net filter F2. At this time, since the diameter of the pipe portion 62 linearly and gradually decreases toward the opening 62B, the wind that goes straight through the air path 61 easily hits the entire surface of the net filter F2. Dust adhered to the surface is easily peeled off.
[0045]
The peeled dust is introduced into the dust collecting chamber 55 through the butting portion 63 and the guide tube 70 and is accumulated.
[0046]
In addition, even if the amount of air passing through the net filter F2 decreases due to clogging, the amount of air flowing straight through the air path 61 of the pipe portion 62 increases, so that the amount of air sucked by the electric blower 33 is kept constant. Therefore, dust can always be sucked with a predetermined suction force regardless of clogging of the net filter F2.
[0047]
In addition, since a swirling flow is not generated in the air passage 61 of the pipe portion 62 to separate dust and air, the air passage loss in the air passage 61 is small. Moreover, when the air is sucked from the air passage 61 of the pipe portion 62 into the negative pressure chamber portion 56 of the container case body 53 through the net filter F2, the suction port 52, the pipe portion 62, the opening 51 of the container case body 53, Since the suction opening 33A of the blower 33 and the suction opening 33A are arranged in a straight line, the direction of the air flow does not largely change as shown by the arrow Q (see FIG. 3), but flows almost linearly, and the electric blower It is sucked by 33.
[0048]
For this reason, the air path loss is further reduced, and the function of the electric blower 33 can be sufficiently exhibited. Furthermore, since the connecting pipe 44 of the lid 40 and the pipe 62 are aligned, the direction of air introduced toward the air inlet 52 of the container case 53 is aligned with the direction in which the pipe 62 extends. The air path loss is even smaller.
[0049]
【The invention's effect】
As described above, according to the present invention, the air path loss can be reduced, and even if dust accumulates, the air volume at the suction port does not decrease, and the dust can always be sucked with a predetermined suction force. it can.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the appearance of an electric vacuum cleaner according to the present invention.
FIG. 2 is a perspective view showing a vacuum cleaner main body of the electric vacuum cleaner shown in FIG. 1;
FIG. 3 is a side view in which a part of the cleaner body shown in FIG. 2 is sectioned;
FIG. 4 is a side view of the cleaner body showing a state where a lid is opened.
FIG. 5 is a perspective view showing the cleaner main body in a state where a lid is opened and a dust container is removed.
FIG. 6 is a longitudinal sectional view showing the configuration of the dust container.
FIG. 7 is a perspective view showing a dust container.
FIG. 8 is a plan sectional view showing a configuration of the dust container.
FIG. 9 is an explanatory view showing the principle of the present invention.
FIG. 10 is an explanatory diagram showing a configuration of a conventional vacuum cleaner.
[Explanation of symbols]
20 Vacuum cleaner body 33 Electric blower 33A Intake opening 43 Connection port (suction port)
52 intake port 55 dust collection chamber (dust collection section)
60 Dust separation part 62 Passage 62A One end opening 62B Other end opening

Claims (3)

A dust separating portion provided in an air passage extending from a suction port of the cleaner body to an intake opening of the electric blower for separating dust, a dust collecting section for collecting dust separated by the dust separating portion, and the suction port And a suction port for introducing air to the dust separation unit from a dust cleaner, having an opening communicating with an intake opening of an electric blower between the dust separation unit and the electric blower,
The dust separating section includes a cylindrical passage having one end opening facing the intake port and the other end opening communicating with the dust collecting portion, and a filter formed on a peripheral surface of the cylindrical passage. Prepare,
The vacuum cleaner according to claim 1, wherein the opening is disposed on a side opposite to the air inlet with respect to the passage, and the dust collecting unit is provided below the passage. A dust separating portion provided in an air passage extending from a suction port of the cleaner body to an intake opening of the electric blower for separating dust, a dust collecting section for collecting dust separated by the dust separating portion, and the suction port And a suction port for introducing air to the dust separation unit from a dust cleaner, having an opening communicating with an intake opening of an electric blower between the dust separation unit and the electric blower,
The dust separating section is formed on a cylindrical passage having one end opening facing the intake port located on the front side thereof and the other end opening communicating with the dust collecting section, and a peripheral surface of the cylindrical passage. With a filtered filter,
The vacuum cleaner is characterized in that the opening is arranged on the rear side of the passage, and the dust collecting unit is provided below the passage. The vacuum cleaner according to claim 1 or 2, wherein the dust separating unit and the dust collecting unit are provided in a dust collecting case, and the dust collecting case is detachable from the cleaner main body.

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