JP2006020833A - Cyclone-type dust separator and vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the dust from being blown up and discharged together with exhaust gas from a dust collecting tub by a swirl. <P>SOLUTION: A cyclone-type dust separator includes a dust separation section (26) to suck in the air from an aperture (42) disposed at a perimeter of an exhaust pipe (32) which penetrates into the vicinity of the center of a swirl duct (38) to change the intake air to the swirl (36), an approximately cylindrical dust collecting section (28) which is attached to the dust separation section (26) from below and drops and collects the dust separated from the swirl (36), and a current plate (44) which is fixed to a closed bottom end of the exhaust pipe (32), has a peripheral edge to extend in a shape of an approximate reverse funnel to an inner wall of the duct collecting section (28) and has an edge section being an elastic film, wherein an interval between the peripheral edge of the current plate (44) and the inner wall of the dust collecting section (28) is made to be 1/2 or smaller than an interval between the exhaust pipe (32) and the dust collecting section (28). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cyclone-type dust separating device mounted in the middle of a suction tube of a vacuum cleaner or in a vacuum cleaner body, and a vacuum cleaner using the same.

  2. Description of the Related Art An electric vacuum cleaner is known in which suction air containing dust sucked from a suction tool (suction nozzle) is guided to a cleaner body through a suction pipe. Here, the intake air containing the dust is passed through a filter provided in the main body of the cleaner, and the dust is collected by this filter.

  In this case, if the dust to be sucked contains a lot of relatively large dust such as waste paper or mud, the filter is quickly clogged, and the suction capability is quickly reduced. Therefore, the filter must be cleaned frequently, resulting in a problem that efficiency is poor. Therefore, it has been proposed that a cyclone type dust separation device is interposed in the middle of the suction pipe connecting the suction tool and the cleaner main body to capture and remove relatively large dust.

Japanese Patent No. 3102864 JP 2003-135336 A JP-A-10-85159

  In Patent Literature 1, the lower end of an exhaust pipe that sucks air from the vicinity of the center of the swirling flow is closed, a large number of fine passage holes are formed on the outer peripheral surface, and air is sucked from these fine passage holes. What is discharged into the vacuum cleaner body is shown. In this case, the dust separated by the swirling flow is collected in a filth collection tub (trash collection section) that surrounds the exhaust pipe and extends downward.

  In Patent Documents 2 and 3, the lower end of the exhaust pipe is exposed near the center of the dust separation part that generates the swirl flow, and the lower part of the dust separation part is gathered through a dust collection opening narrowed in a substantially funnel shape. Shown in communication with the dust. In this case, the dust separated by the swirling flow in the dust separation unit falls to the dust collection unit through the dust collection opening.

  The thing shown by patent document 1 guides the garbage isolate | separated by the centrifugal force with the swirl flow downward along the inner peripheral surface of a filth collection basket, Therefore Separation of garbage and air can be performed efficiently. However, the flow of the swirling flow enters the filth collecting basin along the inner peripheral wall of the filth collecting basin, and the air in the filth collecting basin swirls. For this reason, it is possible that the dust collected at the bottom of the filth collecting tub is wound up by this air flow (swirl flow) and discharged from the exhaust pipe. This dust has a problem of causing clogging in the filter of the cleaner body.

  In this patent document 1, by providing a substantially reverse funnel-shaped filth blocking plate (rectifying plate) at the lower end of the exhaust pipe, the dust that has fallen into the filth collecting tub rides on the rising air current in the filth collecting tub. It is described that it is prevented from rising and being sucked into the exhaust pipe. However, the outer diameter of the dirt blocking plate shown here is set so as to form a large gap with the inner wall of the dirt collecting basket. That is, the outer diameter of the dirt blocking plate is set so as to be closer to the inside than the center of the interval between the outer periphery of the exhaust pipe and the inner periphery of the waste collecting rod, and particularly near 1/3 of the inner diameter side.

  In this way, when the distance between the outer periphery of the dirt blocking plate and the inner surface of the waste collecting rod is large, the swirling flow generated around the exhaust pipe flows into the lower portion of the waste collecting rod through this interval, It has been found that there is a problem in that the filth accumulated at the bottom of the tube is easily wound up by the swirling flow and discharged from the exhaust pipe.

  Patent Documents 2 and 3 show that the swirl flow is generated in the dust separation part and collects dust in the dust collection part separated by the dust collection opening provided on the bottom of the funnel. The flow is less likely to enter the dust collector. For this reason, it is considered that the amount of dust wound up by the swirling flow in the dust collecting portion is smaller than that in Patent Document 1.

  However, depending on the amount of intake air, a swirl flow may be generated in the dust collecting portion, and dust may be wound up. For this reason, it is difficult to reliably prevent the dust collection unit from winding up the dust. Further, since the dust collecting part is provided separately from the dust separating part, there is a problem that the entire length becomes long and the size becomes large.

  The present invention has been made in view of the circumstances as described above, and it is possible to reliably prevent the dust collected in the filth collecting basket and the dust collecting part from being wound up by the swirling flow, and to prevent the wound up dust from being sucked together with the exhaust gas. It is a first object of the present invention to provide a cyclone dust separation device that can be prevented. It is a second object of the present invention to provide an electric vacuum cleaner using this cyclone type dust separation device.

  According to the present invention, a first object is to provide a swirl that uses intake air as a swirl flow in a cyclone-type dust separation device that separates dust from intake air containing dust sucked from an inhaler attached to the tip of a suction pipe. A dust separation part that sucks air from an opening provided on the outer periphery of an exhaust pipe that enters from near the center near the center of the flow path, and an abbreviation that collects the dust separated from the swirling flow that is attached to the dust separation part from below and collected from the bottom. A cylindrical dust collecting part and an outer peripheral edge attached to the closed lower end of the exhaust pipe extend in a substantially reverse funnel shape toward the inner wall of the dust collecting part, and the edge thereof is a flexible thin film A cyclone type dust separation device, characterized in that the gap between the outer peripheral edge of the current plate and the inner wall of the dust collecting part is ½ or less of the distance between the exhaust pipe and the dust collecting part. The

  According to the present invention, a second object is to provide a suction pipe having one end connected to an air suction port of a cleaner body incorporating an electric blower; a suction tool attached to the tip of the suction pipe; A cyclone-type dust separating device according to claim 1, wherein the cyclone-type dust separating device according to claim 1, wherein the dust is separated by using the suction air containing the sucked dust as a swirl flow and the separated dust is dropped and collected in a substantially cylindrical dust collecting unit. Achieved by a vacuum cleaner, characterized in that.

  According to the first aspect of the present invention, since the rectifying plate provided at the lower end of the exhaust pipe has a substantially inverted funnel shape and the edge of the constant width is a flexible thin film, the outer peripheral edge of the rectifying plate and the inner wall of the dust collecting portion The interval can be made sufficiently small. That is, even if this interval is reduced, large dust can be dropped onto the dust collecting part while pushing the thin film open. For this reason, it becomes possible to make this space | interval 1/2 or less of the space | interval of an exhaust pipe and a dust collection part.

  In addition, since the distance between the outer periphery of the current plate and the dust collecting part is small, the swirling flow around the exhaust pipe does not easily enter the dust collecting part, and the dust accumulated at the bottom of the dust collecting part is wound up by the swirling flow. It becomes difficult to be discharged from the exhaust pipe. Furthermore, the air flow returning from the dust collecting section to the exhaust pipe passes through the interval between the rectifying plate and the dust collecting portion. At this time, even if dust is included in the air flow, this interval is narrow, so that the dust is easily captured by the rectifying plate. Therefore, the waste discharged from the discharge pipe can be reduced. For this reason, it is difficult for the dust once entering the dust collecting portion to be exhausted from the exhaust pipe, and it is not necessary to frequently clean the filter in the cleaner body. If this interval is increased to ½ or more, the effect of blocking the swirling flow is reduced, and the effect of preventing the backflow of dust is weakened.

  According to the invention of claim 2, an electric vacuum cleaner using this cyclone type dust separating apparatus is obtained.

  The dust collector has a cylindrical shape at least above the vicinity of the rectifying plate, and when the exhaust pipe is arranged coaxially with this, the rectifying plate is rigid about half of the inside of the portion extending from the outer periphery of the exhaust pipe to the outside. The outer half can be made of a thin film. In this case, the thin film portion becomes sufficiently wide, and large dust can be allowed to pass downward (drop) by deformation of the thin film while ensuring sufficient swirling flow blocking action. The effect of the invention can be increased.

  If the distance between the outer peripheral edge of the rectifying plate and the inner wall of the dust collecting part is 1/3 or less of the distance between the outer periphery of the exhaust pipe and the dust collecting part, the effect of blocking the swirling flow is further increased. In this case, by reducing the outer diameter of the hard material portion inside the rectifying plate, reducing the inner diameter of the thin film, and increasing the radial width of the thin film, the thin film is easily deformed with respect to large dust. Is desirable. Instead of increasing the radial width of the thin film, the material of the thin film may be changed to a soft material.

  The thin film should be made of a material that is less likely to be charged by static electricity caused by dust friction. For example, rubber that is difficult to be charged by static electricity due to friction with ordinary garbage such as paper scraps is preferable. In the rectifying plate, the thickness of the outer thin film and the inner hard material portion may be changed with the same material or the hardness may be changed, or these may be integrated by combining different materials having different hardnesses. The cyclone type dust separation device may be interposed in the middle of the suction pipe that connects the vacuum cleaner main body incorporating the electric blower and the suction tool, but may be provided in the vacuum cleaner main body.

  FIG. 1 is a view showing a use state of an embodiment of the present invention, FIG. 2 is a side sectional view of the cyclone type dust separating device, FIG. 3 is a sectional view of the main part, and FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 and FIG. 5 are developed ABC lines in FIG. 2 and 3 are cross sections taken along the line ABDE in FIG.

  In FIG. 1, reference numeral 10 denotes a cleaner body, which houses a filter 12 and an electric blower 14. Reference numeral 16 denotes an intake pipe, which includes a flexible tube 18 and an extension pipe 20. Reference numeral 22 denotes a cyclone type dust separation device interposed in the middle of the intake pipe 16. The electric blower 14 generates suction force by rotating a fan at high speed with an electric motor.

  In an ordinary vacuum cleaner that does not have the cyclonic dust separation device 22, the flexible tube 18 and the extension tube 20 are directly connected to form the intake pipe 16. When the cyclone type dust separation device 22 is used, it is interposed between the flexible tube 18 and the extension tube 20. The other end of the flexible tube 18 (rear end) is connected to the cleaner body 10. A suction tool (suction brush) 24 is attached to the other end of the extension tube 20.

  By turning on a switch (not shown) provided in the cyclone dust separation device 22, the electric motor of the electric blower 14 is activated, and negative suction pressure is generated in the suction tool 24. Air containing dust is sucked from the suction tool 24, and relatively large dust is separated from the sucked air by the cyclone dust separator 22, and then the air enters the cleaner body 10. This air passes through the cleaner body 10 and is exhausted outside.

  As shown in FIG. 2, the cyclonic dust separator 22 includes a dust separator 26, a dust collector 28, and a grip 30. The dust separation portion 26 is disposed on an opposite axis in parallel with the exhaust pipe 32 which is connected to the flexible tube 18 at the upper end and is bent in a substantially square shape and extends downward. An intake pipe 34 having a lower end connected to the extension pipe 20, and a swirl flow path 38 communicating with the upper end of the intake pipe 34 and guided to the outer periphery of the exhaust pipe 32 to turn the intake air into a swirl flow 36 (FIG. 3); The swirl flow 36 has a swirl flow chamber 40 for separating dust from the intake air. The exhaust pipe 32 is disposed coaxially with the turning center axis X of the swirling flow 36.

  As shown in FIG. 5, the swirling flow path 38 divides the swirling flow chamber 40 and forms a partition wall 38 a serving as a lower wall of the swirling flow path 38, an opening 38 b provided in the partition wall 38 a, and the swirling flow path 38. The upper wall is formed by being surrounded by an inclined wall 38c, an arc-shaped outer peripheral wall 38d, and an inner peripheral wall 38e. The opening 38b is obtained by cutting the partition wall 38a by a length L in the circumferential direction. The inner peripheral wall 38e is the outer peripheral surface of the exhaust pipe 32. The inclined wall 38c has an upstream side (intake pipe 34 side) continuous with the upper wall of the intake pipe 34, and a downstream side (partition wall 38a side) continuous with the rear edge 38f (edge on the downstream side in the turning direction) of the opening 38d. is doing.

  In the exhaust pipe 32, a plurality of exhaust holes 42 are formed on the peripheral surface facing the swirl flow chamber 40 (FIG. 6). The exhaust holes 42 are rectangular windows that are long in the longitudinal direction of the exhaust pipe 32 and wide in the circumferential direction, and two exhaust holes 42 are arranged at opposite positions in the circumferential direction of the exhaust pipe 32. The lower end of the exhaust pipe 32 is closed, and a rectifying plate 44 extending in a substantially reverse funnel shape in the outer peripheral direction is provided at the lower end.

  The rectifying plate 44 is attached and fixed to the closed lower end of the exhaust pipe 32. The rectifying plate 44 has a substantially inverted funnel shape (or substantially inverted cup shape), and has a hard portion 44a made of an inner hard material and a thin film portion 44b made of a continuous thin film on its outer side. Here, the hard portion 44a and the thin film portion 44b have substantially the same radial width. That is, about ½ of the inner side of the rectifying plate 44 becomes the hard portion 44a, and about ½ of the outer side becomes the thin film portion 44b. The hard part 44a and the thin film part 44b may be made of the same material with different thicknesses and hardnesses, but may be combined with other materials.

  Further, a distance Y (FIG. 3) between the outer peripheral edge of the rectifying plate 44 and the inner wall of the dust collecting unit 28 is 1/3 or less of a distance Z between the outer periphery of the exhaust pipe 32 and the dust collecting unit 28. As described above, since the interval Y is sufficiently smaller than the interval Z, the swirl flow 36 in the swirl flow chamber 40 is blocked by the rectifying plate 44 and is less likely to enter the dust collection unit 28 below. For this reason, the trash stored at the bottom in the trash collector 28 is not rolled up. Further, since the rectifying plate 44 has a shape that expands in the downward direction, the thin film portion 44b falls down and is easily deformed, so that it is difficult to deform upward and exhibits high rigidity. For this reason, large garbage is easy to pass downward, but difficult to pass upward, and the function of capturing the garbage in the garbage collector 28 is increased.

  The dust collecting unit 28 has a substantially warhead type in which the upper end opens and the lower part gradually decreases in diameter, and the upper end is detachably attached to the dust separating unit 26 coaxially with the exhaust pipe 32. That is, a hook 46 provided on the dust separation unit 26 can be engaged with and disengaged from the upper outer periphery of the dust collection unit 28 as shown in FIG. The dust collecting unit 28 is fixed by the hook 46 in a state where it is mounted as shown in FIGS. When discarding the dust accumulated in the dust collection unit 28, the hook 46 may be removed, the dust collection unit 28 may be removed, and the dust inside may be discharged.

The figure which shows the use condition of one Example of this invention Side cross-sectional view of cyclone-type garbage separator Cross section of the main part IV-IV sectional view in FIG. ABC line development in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vacuum cleaner main body 12 Electric blower 16 Suction pipe 22 Cyclone type dust separation device 26 Dust separation part 28 Dust collection part 32 Exhaust pipe 34 Intake pipe 36 Swirling flow 38 Swirling flow path 40 Swirling flow chamber 44 Rectifying plate 44a Hard part 44b Thin film part

Claims (5)

In a cyclone-type dust separation device that separates dust from intake air containing dust sucked from an inhaler attached to the tip of a suction pipe,
A dust separation part that sucks air from an opening provided on the outer periphery of the exhaust pipe that enters from near the center of the swirling flow path having the swirling flow of the intake air;
A substantially cylindrical waste collecting unit that drops and collects the dust separated from the swirl flow attached to the dust separating unit from below;
A rectifying plate attached to the closed lower end of the exhaust pipe and having an outer peripheral edge extending toward the inner wall of the dust collecting part in a substantially reverse funnel shape and having a flexible thin film at the edge thereof. A cyclone type dust separating apparatus characterized in that the distance between the outer periphery of the plate and the inner wall of the dust collecting part is ½ or less of the distance between the exhaust pipe and the dust collecting part.   The dust collecting portion is cylindrical at least above the vicinity of the rectifying plate, the exhaust pipe is disposed coaxially with the dust collecting portion, and the rectifying plate is about ½ of the inside extending from the outer periphery of the exhaust pipe to the outside. The cyclone type dust separating apparatus according to claim 1, wherein is a hard material and the outer half is made of a thin film.   The cyclone dust separating apparatus according to claim 1 or 2, wherein a distance between the outer peripheral edge of the current plate and the inner wall of the dust collecting part is 1/3 or less of a distance between the outer periphery of the exhaust pipe and the dust collecting part.   The cyclone type dust separator according to any one of claims 1 to 3, wherein the thin film of the current plate is made of soft rubber. A suction pipe having one end connected to the air suction port of the vacuum cleaner body incorporating the electric blower;
A suction tool attached to the tip of the suction tube;
The cyclone type dust separation device according to claim 1, wherein the dust is separated by using suction air containing dust sucked from the suction tool as a swirl flow, and the separated dust is dropped and collected in a substantially cylindrical dust collecting unit. When;
A vacuum cleaner comprising:

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