CA2509177A1 - Cyclone type dirt separator and electric vacuum cleaner - Google Patents
Cyclone type dirt separator and electric vacuum cleaner Download PDFInfo
- Publication number
- CA2509177A1 CA2509177A1 CA002509177A CA2509177A CA2509177A1 CA 2509177 A1 CA2509177 A1 CA 2509177A1 CA 002509177 A CA002509177 A CA 002509177A CA 2509177 A CA2509177 A CA 2509177A CA 2509177 A1 CA2509177 A1 CA 2509177A1
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- CA
- Canada
- Prior art keywords
- dirt
- collection chamber
- cyclone type
- recessed portion
- dirt collection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1683—Dust collecting chambers; Dust collecting receptacles
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1608—Cyclonic chamber constructions
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/165—Construction of inlets
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1658—Construction of outlets
- A47L9/1666—Construction of outlets with filtering means
Abstract
A cyclone type dirt separator (22) disposed at an intermediate point of an suction tube (16) which connects the suction fitting (24) and the cleaner main body (10) of an electric vacuum cleaner, the dirt separator (22) including: a dirt separating section (26) which causes the suction air to undergo a spiral flow (36) and conducts air from the vicinity of the center of this spiral flow (36) to the cleaner main body (10), a dirt collection chamber (28) which is attached to the dirt separating section (26) from below and causes the dirt separated from the spiral flow (36) to drop so that the dirt is collected inside the dirt collection chamber (28), and a recessed portion (48) which is formed in the vicinity of the inside bottom center of the dirt collection chamber (28) so as to be recessed downward.
Description
CYCLONE TYPE DIRT SEPARATOR
AND
ELECTRIC VACUUM CLEANER
BACKGROUND OF THE INVENTION
1. Technical Field The present invention relates to a cyclone type dirt separator which is provided at an intermediate point of the suction tube of an electric vacuum cleaner and further relates to an electric vacuum cleaner that uses such a separator.
AND
ELECTRIC VACUUM CLEANER
BACKGROUND OF THE INVENTION
1. Technical Field The present invention relates to a cyclone type dirt separator which is provided at an intermediate point of the suction tube of an electric vacuum cleaner and further relates to an electric vacuum cleaner that uses such a separator.
2. Description of the Related Art In typical electric vacuum cleaners, suction air that involves dirt that is sucked in via a suction fitting (suction nozzle) is led to the cleaner main body via a suction tube. Here, the suction air that contains dirt passes through a filter installed in the cleaner main body, and dirt is collected by this filter.
In collection of the dirt, if relatively large pieces of dirt such as paper debris, sludge and the like are contained in large quantities in the dirt that is sucked in, the filter quickly becomes clogged, so that the suction capacity soon drops.
Accordingly, the filter must be cleaned frequently, and this frequent filter cleaning is in fact a problem of poor efficiency. In order to solve this problem, a system has been proposed in which a cyclone type dirt separator is interposed at an intermediate point of the suction tube that connects the suction fitting and the cleaner main body, so that the cyclone type dirt separator captures and removes relatively large pieces of dirt.
In the cyclone type dirt separator disclosed in Japanese Patent No.
3102864, the lower end of an exhaust tube that sucks air from the vicinity of a spiral flow into the cleaner main body is closed, numerous fine through-holes are formed in the outer circumferential surface of this tube, and air is sucked from these fine through-holes and discharged into the cleaner main body. In this structure, the dirt that is separated from the spiral flow is collected in a contaminant collection trough (a dirt collection part) that extends downward and surrounds the exhaust tube.
On the other hand, in the cyclone type dirt separators of Japanese Patent Application Laid-Open (Kokai) Nos. 2003-735336 and H10-85159, the open lower end of an exhaust tube is caused to face the vicinity of the center of the dust separating section that generates a spiral flow, and the lower part of the dust separating section is communicated with a dust collecting part that is provided below the dust separating section via a dust collecting opening that is in the form of a funnel. In this structure, the dirt that is separated by the spiral flow in the dust separating section drops into the dust collecting part via the dust collecting opening.
However, in the system of Japanese Patent No. 3102864, dirt separated by centrifugal force in the spiral flow is conducted downward along the inside circumferential wall of the contaminant collecting trough; accordingly, the separation of dirt and air can be accomplished with good efficiency. However, since the fluid motion of the spiral flow enters the interior of the contaminant collecting trough along the inside circumferential wall of the contaminant collecting trough, the air inside the contaminant collecting trough undergoes a spiral flow.
As a result, the dirt that collects in the bottom of the contaminant collecting trough is entrained by the fluid motion (spiral flow) of this air and may be discharged from the exhaust tube. This dirt causes clogging of the filter of the cleaner main body.
In the systems of Japanese Patent Application Laid-Open (Kokai) Nos.
2003-135336 and H10-85159, a spiral flow is generated in the dust separating section, and dirt is collected in the dust collecting part separated by the dust collecting opening installed in the funnel-form bottom. Consequently, the spiral flow inside the dust separating section tends not to enter the dust collecting part.
Accordingly, it would appear that the amount of dirt that is entrained by the spiral flow in dust collecting part is small compared to that seen in the system of Japanese Patent No. 3102864.
However, a spiral flow would be generated inside the dust collecting part according to the amount of suction air, so that dirt may be entrained; and secure prevention of the entrainment of dirt in the dust collecting part is difficult.
Furthermore, since the dust collecting part is installed separately from the dust separating section, the total length of the structure increases, causing a problem of increased size of the apparatus.
BRIEF SUMMARY OF' THE INVENTION
Accordingly, in a preferred embodiment of the present invention there is provided a cyclone type dirt separator which prevents the entrainment of dirt accumulated in the contaminant collecting trough or dust collecting part by spiral flow of air, thus preventing the exhaust of entrained dirt and intake of such dirt into the cleaner main body.
In another preferred embodiment of the present invention there is provided an electric vacuum cleaner that is equipped with such a cyclone type dirt separator.
According to a further preferred embodiment of the present invention, there is provided a cyclone type dirt separator, which is interposed at an intermediate point of the suction tube connecting the suction fitting and a cleaner main body of an electric vacuum cleaner, and which separates dirt from the suction air containing dirt that is sucked in from the suction fitting; and in the present invention, the separator is comprised of:
a dirt separating section which causes the suction air to make a spiral flow and conducts air from the vicinity of the center of this spiral flow to the cleaner main body, a dirt collection chamber which is mounted on this dirt separating section from below and causes the dirt separated from the spiral flow to drop so that the dirt is collected in said dirt collection chamber, and a recessed portion formed in the vicinity of the inside bottom center of the dirt collection chamber so as to be recessed downward.
The invention thus provides a unique structure of the present invention for an electric vacuum cleaner having a cleaner main body provided with an electrically driven air blower;
a suction tube having opposed ends, one end thereof being connected to a vacuum suction port of said cleaner main body;
a suction fitting attached to the other of said opposed ends of said suction tube; and a cyclone type dirt separator provided at an intermediate point between said ends of said suction tube, said cyclone type dirt separator being adapted to create suction air containing dirt to be sucked in through a suction fitting and form a spiral flow to separate dirt from said air and to cause separated dirt to drop into a substantially tubular dirt collection chamber and to be collected in said dirt collection chamber; the improvement wherein said dirt collection chamber includes an inside bottom center and a recessed portion, the recessed portion formed proximate said inside bottom center of said dirt collection chamber and being recessed generally downwardly relative thereto.
In this structure of the present invention, since the recessed portion is formed in the vicinity of the center of the inside bottom of the dirt collection chamber, the dirt that enters the dirt collection chamber is conducted into the inside bottom surface and is collected in the recessed portion. In addition, even if a spiral flow is generated in the dirt collection chamber, since this spiral flow tends not to enter the sunken recessed portion, no entrainment of the dirt accumulated in the recessed portion occurs, and dirt in the vicinity of the inside bottom likewise tends not to become entangled and entrained with the dirt accumulated in this recessed portion. Accordingly, dirt that has once entered the dirt collection chamber is prevented from being discharged from the exhaust tube, so that the need for frequent cleaning of the filter inside the cleaner main body is eliminated.
In collection of the dirt, if relatively large pieces of dirt such as paper debris, sludge and the like are contained in large quantities in the dirt that is sucked in, the filter quickly becomes clogged, so that the suction capacity soon drops.
Accordingly, the filter must be cleaned frequently, and this frequent filter cleaning is in fact a problem of poor efficiency. In order to solve this problem, a system has been proposed in which a cyclone type dirt separator is interposed at an intermediate point of the suction tube that connects the suction fitting and the cleaner main body, so that the cyclone type dirt separator captures and removes relatively large pieces of dirt.
In the cyclone type dirt separator disclosed in Japanese Patent No.
3102864, the lower end of an exhaust tube that sucks air from the vicinity of a spiral flow into the cleaner main body is closed, numerous fine through-holes are formed in the outer circumferential surface of this tube, and air is sucked from these fine through-holes and discharged into the cleaner main body. In this structure, the dirt that is separated from the spiral flow is collected in a contaminant collection trough (a dirt collection part) that extends downward and surrounds the exhaust tube.
On the other hand, in the cyclone type dirt separators of Japanese Patent Application Laid-Open (Kokai) Nos. 2003-735336 and H10-85159, the open lower end of an exhaust tube is caused to face the vicinity of the center of the dust separating section that generates a spiral flow, and the lower part of the dust separating section is communicated with a dust collecting part that is provided below the dust separating section via a dust collecting opening that is in the form of a funnel. In this structure, the dirt that is separated by the spiral flow in the dust separating section drops into the dust collecting part via the dust collecting opening.
However, in the system of Japanese Patent No. 3102864, dirt separated by centrifugal force in the spiral flow is conducted downward along the inside circumferential wall of the contaminant collecting trough; accordingly, the separation of dirt and air can be accomplished with good efficiency. However, since the fluid motion of the spiral flow enters the interior of the contaminant collecting trough along the inside circumferential wall of the contaminant collecting trough, the air inside the contaminant collecting trough undergoes a spiral flow.
As a result, the dirt that collects in the bottom of the contaminant collecting trough is entrained by the fluid motion (spiral flow) of this air and may be discharged from the exhaust tube. This dirt causes clogging of the filter of the cleaner main body.
In the systems of Japanese Patent Application Laid-Open (Kokai) Nos.
2003-135336 and H10-85159, a spiral flow is generated in the dust separating section, and dirt is collected in the dust collecting part separated by the dust collecting opening installed in the funnel-form bottom. Consequently, the spiral flow inside the dust separating section tends not to enter the dust collecting part.
Accordingly, it would appear that the amount of dirt that is entrained by the spiral flow in dust collecting part is small compared to that seen in the system of Japanese Patent No. 3102864.
However, a spiral flow would be generated inside the dust collecting part according to the amount of suction air, so that dirt may be entrained; and secure prevention of the entrainment of dirt in the dust collecting part is difficult.
Furthermore, since the dust collecting part is installed separately from the dust separating section, the total length of the structure increases, causing a problem of increased size of the apparatus.
BRIEF SUMMARY OF' THE INVENTION
Accordingly, in a preferred embodiment of the present invention there is provided a cyclone type dirt separator which prevents the entrainment of dirt accumulated in the contaminant collecting trough or dust collecting part by spiral flow of air, thus preventing the exhaust of entrained dirt and intake of such dirt into the cleaner main body.
In another preferred embodiment of the present invention there is provided an electric vacuum cleaner that is equipped with such a cyclone type dirt separator.
According to a further preferred embodiment of the present invention, there is provided a cyclone type dirt separator, which is interposed at an intermediate point of the suction tube connecting the suction fitting and a cleaner main body of an electric vacuum cleaner, and which separates dirt from the suction air containing dirt that is sucked in from the suction fitting; and in the present invention, the separator is comprised of:
a dirt separating section which causes the suction air to make a spiral flow and conducts air from the vicinity of the center of this spiral flow to the cleaner main body, a dirt collection chamber which is mounted on this dirt separating section from below and causes the dirt separated from the spiral flow to drop so that the dirt is collected in said dirt collection chamber, and a recessed portion formed in the vicinity of the inside bottom center of the dirt collection chamber so as to be recessed downward.
The invention thus provides a unique structure of the present invention for an electric vacuum cleaner having a cleaner main body provided with an electrically driven air blower;
a suction tube having opposed ends, one end thereof being connected to a vacuum suction port of said cleaner main body;
a suction fitting attached to the other of said opposed ends of said suction tube; and a cyclone type dirt separator provided at an intermediate point between said ends of said suction tube, said cyclone type dirt separator being adapted to create suction air containing dirt to be sucked in through a suction fitting and form a spiral flow to separate dirt from said air and to cause separated dirt to drop into a substantially tubular dirt collection chamber and to be collected in said dirt collection chamber; the improvement wherein said dirt collection chamber includes an inside bottom center and a recessed portion, the recessed portion formed proximate said inside bottom center of said dirt collection chamber and being recessed generally downwardly relative thereto.
In this structure of the present invention, since the recessed portion is formed in the vicinity of the center of the inside bottom of the dirt collection chamber, the dirt that enters the dirt collection chamber is conducted into the inside bottom surface and is collected in the recessed portion. In addition, even if a spiral flow is generated in the dirt collection chamber, since this spiral flow tends not to enter the sunken recessed portion, no entrainment of the dirt accumulated in the recessed portion occurs, and dirt in the vicinity of the inside bottom likewise tends not to become entangled and entrained with the dirt accumulated in this recessed portion. Accordingly, dirt that has once entered the dirt collection chamber is prevented from being discharged from the exhaust tube, so that the need for frequent cleaning of the filter inside the cleaner main body is eliminated.
Accordingly, in the electric vacuum cleaner of the present invention, dirt that has once entered the dirt collection chamber of the cyclone type dirt separator is prevented from being discharged from the exhaust tube, and the need for frequent cleaning of the filter inside the cleaner main body is eliminated.
In the cyclone type dirt separator of the present invention, the separating section may comprise an exhaust tube, which is disposed substantially in coaxial with the central axis of the spiral of the spiral flow, whose lower end is closed off, and which exhausts air via the exhaust openings in the circumferential surface;
and the dirt collection chamber may have a substantially tubular shape that extends downward while surrounding this exhaust tube. In this case, the dirt that is separated by the centrifugal force arising from the spiral flow can be conducted into the inside bottom of the dirt collection chamber with good efficiency, so that the dirt separation is done efficiently. Furthermore, one part (the upper part) of the dirt collection chamber surrounds the exhaust tube and forms an integral unit with the separating section, thus generating a spiral current of air;
accordingly, this structure contributes the overall size reduction.
Furthermore, with a substantially flange-form baffling plate which narrows the air flow path between this baffling plate and the inside wall of the dirt collection chamber, the entry of the spiral flow into the inside bottom of the dirt collection chamber is prevented, so that the entrainment of dirt accumulated in this inside bottom and the outflow of such dirt together with the exhaust can be much more securely prevented.
In the present invention, the inside surface in the vicinity of the opening of the recessed portion and the inside bottom surface of the dirt collection chamber are not smoothly continuous, or such surfaces meet with a ridge in between.
For example, the inside bottom surface of the dirt collection chamber can be formed as a so-called artillery shell-form curved surface in which the diameter is smoothly reduced downward, and this curved surface and the opening circular edge of the recessed portion abuts at an obtuse angle to form a substantially annular edge shape. With this structure, if a spiral flow occurs in the inside bottom, the spiral flow is less likely to enter the recessed portion.
The recessed portion can be of a substantially cylindrical shape with a closed bottom. However, the present invention is not limited to this structure, and a square tubular shape recessed portion that has a closed bottom or the like can be also used. By way of setting the diameter of the opening of the recessed portion at approximately 1/2 to 1/3 of the diameter near the center of the dirt collection chamber, the intrusion of the spiral flow can be sufficiently cut off while maintaining the capacity (volume) of the recessed portion at a large value.
In the present invention, it is preferable that the cyclone type dirt separator be installed in the connecting portion between a flexible tube and an extension tube that constitute the suction tube of an electric vacuum cleaner; however, this cyclone type dirt separator can be disposed, for instance, in the vicinity of the tip end of the extension tube and in the vicinity of the vicinity of the rear end of the flexible tube (immediately before the cleaner main body or the like).
BRIEF DESCRIPTION OF THE DRAWINGS:
Reference will now be made to the accompanying drawings illustrating preferred embodiments in which:
Figure 1 shows the electric vacuum cleaner of the present invention equipped with a cyclone type dirt separator according to one embodiment of the present invention;
Figure 2 is a sectional side view of the cyclone type dirt separator;
Figure 3 is a sectional view of the essential portion of the cyclone type dirt separator;
Figure 4 is a sectional view taken along the line IV-IV in Figure 3;
Figure 5 is a sectional view taken along the line V-V in Figure 4; and Figure 6 illustrates the exhaust openings of the exhaust tube inside the dirt separator.
DETAILED DESCRIPTION OF THE INVENTION
In Figure 1, the reference numeral 10 is a cleaner main body, and this cleaner main body 10 is equipped with a filter 12 and an electrically driven air blower 14. A suction tube 16 connected to the cleaner main body 10 is comprised of a flexible tube 18 and an extension tube 20, and a cyclone type dirt separator 22 is provided at an intermediate point of this suction tube 16. The electrically driven air blower 14 generates a suction force by rotating a fan (not shown) at high speed with an electric motor (not shown).
The electric vacuum cleaner 10 is indeed usable without a cyclone type dirt separator 22; and in this case, the flexible tube 18 (or the forward end of the flexible tube 18) and the extension tube 20 (or the rear end of the extension tube 20) are directly connected to each other to form the suction tube 16. When a cyclone type dirt separator 22 is used, the cyclone type dirt separator 22 is interposed between the flexible tube 18 and the extension tube 20. In other words, the forward end of the flexible tube 18 is connected to the rear end of the dirt separator 22 (or to the exhaust tube 32, which will be described later, of the dirt separator 22), and the rear end of the flexible tube 18 is connected to the cleaner main body 10, and a suction fitting (suction brush) 24 is attached to the forward end of the extension tube 20 and the rear end of the extension tube 20 is connected to the dirt separator 22 (or to the suction intake tube 34, which will be described later, of the dirt separator 22) as shown by arrows in Figure 1.
When a switch (not shown) on the cyclone type dirt separator 22 is turned on, the electric motor of the air blower is started; and an air suction negative pressure is generated in the suction fitting 24. Air that contains dirt is sucked in via the suction fitting 24, and relatively large pieces of dirt are separated from this suction air by the cyclone type dirt separator 22; and then the air enters the cleaner main body 10. This air passes through the cleaner main body and is exhausted to the outside.
As seen from Figure 2, the cyclone type dirt separator 22 is comprised of a dirt separating section 26, a dirt collection chamber 28, and a grip section 30.
The dirt separating section 26 includes an exhaust tube 32, a suction intake tube 34, a spiral flow passage 38 and a spiral flow compartment 40. The exhaust tube 32 is, at its end, connected to the flexible tube 18; and this exhaust tube 32 extends downward and is bent at its intermediate point to take a substantially shallow V shape when viewed from the side as seen from Figure 2. The suction intake tube 34 is disposed parallel to and on a different axis than the lower part of the exhaust tube 32, and the lower end of the suction intake tube 34 is connected to the extension tube 20. The spiral flow passage 38 is provided so as to communicate with the upper end of the suction intake tube 34 and is led to the outer circumference of the exhaust tube 32 so that the suction air is put in a spiral flow 36 (see Figure 3). The spiral flow compartment 40 separates dirt from the suction air by means of the spiral flow 36 of the air. The exhaust tube 32 is disposed in substantially coaxial with the central axis of the rotation of the spiral flow 36.
As shown in Figure 5, the spiral flow passage 38 is formed by being surrounded by a partition wall 38a that constitutes the lower wall of the spiral flow passage 38 which forms a partition with the spiral flow compartment 40, a flow passage opening 38b that is formed in this partition wall 38a, an inclined wall 38c that constitutes the upper wall of the spiral flow passage 38, a circular arc form outer circumferential wall 38d, and an inner circumferential wall 38e. The flow passage opening 38b is formed by cutting away the partition wall 38a for the length L in the circumferential direction. The inner circumferential wall 38e is formed by the outer circumferential surface of the exhaust tube 32. The upstream side of the inclined wall 38c (the upstream side being the part located on the suction intake tube 34 side) is connected to the upper wall of the suction intake tube 34, and the downstream side (which is the portion located on the partition wall 38a side) is connected to the rear edge 38f (which is on the downstream side in the spiral direction) of the opening 38b.
The exhaust tube 32 is formed, on its circumferential wall, with numerous exhaust openings 42 (see Figure 6) so that the exhaust openings 42 face the spiral flow compartment 40. Each of the exhaust openings 42 is in a slit-form having longer longitudinal sides in the longitudinal direction of the exhaust tube 32 than the width in the circumferential direction. Thus, the exhaust opening 42 is, for instance, approximately 20 mm long and approximately 6 mm wide. These exhaust openings 42 are provided in two (upper and lower) stages in the longitudinal direction of the exhaust tube 32, and they prevent large pieces of debris such as paper scraps or the like from being sucked into the exhaust tube 32. The lower end 32a of the exhaust tube 32 is closed, and a baffling plate that extends substantially in the form of a cone is disposed on this lower end of the exhaust tube 32. In the shown embodiment, the baffling plate 44 has a substantially circular (reversed) conical shape so that the diameter gradually increases toward its lower edge.
With the structure described above, air or dirty air is sucked in through the suction fitting (suction brush) 24 and rapidly flows through the extension tube 20 and into the suction intake tube 34 of the separator 22. Then, the air enters the spiral flow passage 38, flows along the curved outer and inner circumferential walls 38d and 38e and hits the inclined wall 38c, so that the air, while being rotating, flows downward into the spiral flow compartment 40 through the flow passage opening 38b, thus forming a spiral flow 36 or "cyclone." The spiral flow 36, particularly the portion of the air which is in the vicinity of the center of the spiral flow 36, enters the exhaust tube 32 through the exhaust openings 42 of the exhaust tube 32 so that large pieces of dirt in the air are caught by the striped pattern portions between the exhaust openings 42 and thus separated and removed from the spiral flow 36, and the air without large pieces of dirt eventually flows into the cleaner main body 10 through the flexible tube 18.
The dirt collection chamber 28 has a shape of a substantially artillery shell in which the upper end is open and the lower part shows a gradual and smooth decrease in diameter. The dirt collection chamber 28 is, at its upper end, attached to the dirt separating section 26 in a coaxial relation with the exhaust tube 32, and the dirt collection chamber 28 is detachable with reference to the dirt separating section 26.
The spiral flow compartment 40 is provided in coaxial with the exhaust tube 32 between the exhaust tube 32 and the upper part of the dirt collection chamber 28.
The diameter of the baffling plate 44 is set so that air is allowed to flow between the baffling plate 44 and the inside surface of the dirt collection chamber 28, so that the spiral flow 36 is prevented from flowing around beneath the baffling plate 44 and so that a gap that suppresses any back flow of dirt is formed.
The dirt collection chamber 28 is provided so that the inside bottom surface 46 is takes a curved surface that has a smooth decrease in diameter in the downward direction. A recessed portion 48 that sinks downward is formed in the center of this inside bottom surface 46 of the dirt collection chamber 28. The recessed portion 48 is in a shape of a cylinder with a closed bottom, and the diameter of this recessed portion is approximately 1/2 to 1l3 of the diameter of the dirt collection chamber 28. More specifically, the diameter of this recessed portion 48 is approximately 1/2 to 1/3 of the diameter of the approximately the vertically central portion of the dirt collection chamber 28 which is substantially at the height of the baffling plate 44. As best seen from Figure 3, the central axis of the recessed portion 48 is set on the central axis A of the exhaust tube 32, thus being on the axis of the rotation of the spiral flow 36.
The curved surface of the inside bottom surface 46 of the dirt collection chamber 28 and the inside surface in the vicinity of the opening or of the opening edge 48a of the recessed portion 48 are formed so that they are not smoothly continuous (or contiguous). In other word, as best seen from Figure 3, the portion where the inside bottom surface 46 of the dirt collection chamber 28 and the opening or the opening edge 48a of the recessed portion 48 abut each other with an obtuse-angle and thus takes an obtuse-angle edge form surface or a step form surface. Since this abutting surface is thus a surface that is bent in a discontinuous form, edge form or step form from the inside bottom surface 46 to the recessed portion 48, even if the spiral flow 36 drops down along the inside bottom surface 46, this spiral flow is blocked by the opening edge 48a of the recessed portion 48, and dirt that has dropped into the recessed portion 48 is not entrained by the spiral flow. Furthermore, dirt that drops into the dirt collection chamber 28 is prevented from being entrained since such dirt dropping into the dirt collection chamber 28 is entangled with dirt that has previously been dropped in the bottom of the dirt collection chamber 28.
The dirt collection chamber 28 is detachable. In other words, as shown in Figures 1 and 2, the hook 50 provided in the vicinity of the lower end of the suction intake tube 34 is provided so that it is engaged with and disengaged from the outside of the recessed portion 48 positioned at the lower end of the dirt collection chamber 28. When the dirt collection chamber 28 is set on the suction intake tube 34 as shown in Figures 2 and 3, the dirt collection chamber 28 is fastened in place by this hook 50. When dirt that has accumulated inside the dirt collection chamber 28 is to be discarded, the hook 50 is disengaged from the recessed portion 48, the dirt collection chamber 28 is removed from the suction intake tube 34, and the dirt inside the recessed portion 48 is discharged.
While the invention has been described in terms of various preferred embodiments, the skilled artisan will appreciate the various modifications, substitutions, and changes which may be made without departing from the spirit hereof. The descriptions of the subject matter in this disclosure are illustrative of the invention and are not intended to be construed as limitations upon the scope of the invention.
In the cyclone type dirt separator of the present invention, the separating section may comprise an exhaust tube, which is disposed substantially in coaxial with the central axis of the spiral of the spiral flow, whose lower end is closed off, and which exhausts air via the exhaust openings in the circumferential surface;
and the dirt collection chamber may have a substantially tubular shape that extends downward while surrounding this exhaust tube. In this case, the dirt that is separated by the centrifugal force arising from the spiral flow can be conducted into the inside bottom of the dirt collection chamber with good efficiency, so that the dirt separation is done efficiently. Furthermore, one part (the upper part) of the dirt collection chamber surrounds the exhaust tube and forms an integral unit with the separating section, thus generating a spiral current of air;
accordingly, this structure contributes the overall size reduction.
Furthermore, with a substantially flange-form baffling plate which narrows the air flow path between this baffling plate and the inside wall of the dirt collection chamber, the entry of the spiral flow into the inside bottom of the dirt collection chamber is prevented, so that the entrainment of dirt accumulated in this inside bottom and the outflow of such dirt together with the exhaust can be much more securely prevented.
In the present invention, the inside surface in the vicinity of the opening of the recessed portion and the inside bottom surface of the dirt collection chamber are not smoothly continuous, or such surfaces meet with a ridge in between.
For example, the inside bottom surface of the dirt collection chamber can be formed as a so-called artillery shell-form curved surface in which the diameter is smoothly reduced downward, and this curved surface and the opening circular edge of the recessed portion abuts at an obtuse angle to form a substantially annular edge shape. With this structure, if a spiral flow occurs in the inside bottom, the spiral flow is less likely to enter the recessed portion.
The recessed portion can be of a substantially cylindrical shape with a closed bottom. However, the present invention is not limited to this structure, and a square tubular shape recessed portion that has a closed bottom or the like can be also used. By way of setting the diameter of the opening of the recessed portion at approximately 1/2 to 1/3 of the diameter near the center of the dirt collection chamber, the intrusion of the spiral flow can be sufficiently cut off while maintaining the capacity (volume) of the recessed portion at a large value.
In the present invention, it is preferable that the cyclone type dirt separator be installed in the connecting portion between a flexible tube and an extension tube that constitute the suction tube of an electric vacuum cleaner; however, this cyclone type dirt separator can be disposed, for instance, in the vicinity of the tip end of the extension tube and in the vicinity of the vicinity of the rear end of the flexible tube (immediately before the cleaner main body or the like).
BRIEF DESCRIPTION OF THE DRAWINGS:
Reference will now be made to the accompanying drawings illustrating preferred embodiments in which:
Figure 1 shows the electric vacuum cleaner of the present invention equipped with a cyclone type dirt separator according to one embodiment of the present invention;
Figure 2 is a sectional side view of the cyclone type dirt separator;
Figure 3 is a sectional view of the essential portion of the cyclone type dirt separator;
Figure 4 is a sectional view taken along the line IV-IV in Figure 3;
Figure 5 is a sectional view taken along the line V-V in Figure 4; and Figure 6 illustrates the exhaust openings of the exhaust tube inside the dirt separator.
DETAILED DESCRIPTION OF THE INVENTION
In Figure 1, the reference numeral 10 is a cleaner main body, and this cleaner main body 10 is equipped with a filter 12 and an electrically driven air blower 14. A suction tube 16 connected to the cleaner main body 10 is comprised of a flexible tube 18 and an extension tube 20, and a cyclone type dirt separator 22 is provided at an intermediate point of this suction tube 16. The electrically driven air blower 14 generates a suction force by rotating a fan (not shown) at high speed with an electric motor (not shown).
The electric vacuum cleaner 10 is indeed usable without a cyclone type dirt separator 22; and in this case, the flexible tube 18 (or the forward end of the flexible tube 18) and the extension tube 20 (or the rear end of the extension tube 20) are directly connected to each other to form the suction tube 16. When a cyclone type dirt separator 22 is used, the cyclone type dirt separator 22 is interposed between the flexible tube 18 and the extension tube 20. In other words, the forward end of the flexible tube 18 is connected to the rear end of the dirt separator 22 (or to the exhaust tube 32, which will be described later, of the dirt separator 22), and the rear end of the flexible tube 18 is connected to the cleaner main body 10, and a suction fitting (suction brush) 24 is attached to the forward end of the extension tube 20 and the rear end of the extension tube 20 is connected to the dirt separator 22 (or to the suction intake tube 34, which will be described later, of the dirt separator 22) as shown by arrows in Figure 1.
When a switch (not shown) on the cyclone type dirt separator 22 is turned on, the electric motor of the air blower is started; and an air suction negative pressure is generated in the suction fitting 24. Air that contains dirt is sucked in via the suction fitting 24, and relatively large pieces of dirt are separated from this suction air by the cyclone type dirt separator 22; and then the air enters the cleaner main body 10. This air passes through the cleaner main body and is exhausted to the outside.
As seen from Figure 2, the cyclone type dirt separator 22 is comprised of a dirt separating section 26, a dirt collection chamber 28, and a grip section 30.
The dirt separating section 26 includes an exhaust tube 32, a suction intake tube 34, a spiral flow passage 38 and a spiral flow compartment 40. The exhaust tube 32 is, at its end, connected to the flexible tube 18; and this exhaust tube 32 extends downward and is bent at its intermediate point to take a substantially shallow V shape when viewed from the side as seen from Figure 2. The suction intake tube 34 is disposed parallel to and on a different axis than the lower part of the exhaust tube 32, and the lower end of the suction intake tube 34 is connected to the extension tube 20. The spiral flow passage 38 is provided so as to communicate with the upper end of the suction intake tube 34 and is led to the outer circumference of the exhaust tube 32 so that the suction air is put in a spiral flow 36 (see Figure 3). The spiral flow compartment 40 separates dirt from the suction air by means of the spiral flow 36 of the air. The exhaust tube 32 is disposed in substantially coaxial with the central axis of the rotation of the spiral flow 36.
As shown in Figure 5, the spiral flow passage 38 is formed by being surrounded by a partition wall 38a that constitutes the lower wall of the spiral flow passage 38 which forms a partition with the spiral flow compartment 40, a flow passage opening 38b that is formed in this partition wall 38a, an inclined wall 38c that constitutes the upper wall of the spiral flow passage 38, a circular arc form outer circumferential wall 38d, and an inner circumferential wall 38e. The flow passage opening 38b is formed by cutting away the partition wall 38a for the length L in the circumferential direction. The inner circumferential wall 38e is formed by the outer circumferential surface of the exhaust tube 32. The upstream side of the inclined wall 38c (the upstream side being the part located on the suction intake tube 34 side) is connected to the upper wall of the suction intake tube 34, and the downstream side (which is the portion located on the partition wall 38a side) is connected to the rear edge 38f (which is on the downstream side in the spiral direction) of the opening 38b.
The exhaust tube 32 is formed, on its circumferential wall, with numerous exhaust openings 42 (see Figure 6) so that the exhaust openings 42 face the spiral flow compartment 40. Each of the exhaust openings 42 is in a slit-form having longer longitudinal sides in the longitudinal direction of the exhaust tube 32 than the width in the circumferential direction. Thus, the exhaust opening 42 is, for instance, approximately 20 mm long and approximately 6 mm wide. These exhaust openings 42 are provided in two (upper and lower) stages in the longitudinal direction of the exhaust tube 32, and they prevent large pieces of debris such as paper scraps or the like from being sucked into the exhaust tube 32. The lower end 32a of the exhaust tube 32 is closed, and a baffling plate that extends substantially in the form of a cone is disposed on this lower end of the exhaust tube 32. In the shown embodiment, the baffling plate 44 has a substantially circular (reversed) conical shape so that the diameter gradually increases toward its lower edge.
With the structure described above, air or dirty air is sucked in through the suction fitting (suction brush) 24 and rapidly flows through the extension tube 20 and into the suction intake tube 34 of the separator 22. Then, the air enters the spiral flow passage 38, flows along the curved outer and inner circumferential walls 38d and 38e and hits the inclined wall 38c, so that the air, while being rotating, flows downward into the spiral flow compartment 40 through the flow passage opening 38b, thus forming a spiral flow 36 or "cyclone." The spiral flow 36, particularly the portion of the air which is in the vicinity of the center of the spiral flow 36, enters the exhaust tube 32 through the exhaust openings 42 of the exhaust tube 32 so that large pieces of dirt in the air are caught by the striped pattern portions between the exhaust openings 42 and thus separated and removed from the spiral flow 36, and the air without large pieces of dirt eventually flows into the cleaner main body 10 through the flexible tube 18.
The dirt collection chamber 28 has a shape of a substantially artillery shell in which the upper end is open and the lower part shows a gradual and smooth decrease in diameter. The dirt collection chamber 28 is, at its upper end, attached to the dirt separating section 26 in a coaxial relation with the exhaust tube 32, and the dirt collection chamber 28 is detachable with reference to the dirt separating section 26.
The spiral flow compartment 40 is provided in coaxial with the exhaust tube 32 between the exhaust tube 32 and the upper part of the dirt collection chamber 28.
The diameter of the baffling plate 44 is set so that air is allowed to flow between the baffling plate 44 and the inside surface of the dirt collection chamber 28, so that the spiral flow 36 is prevented from flowing around beneath the baffling plate 44 and so that a gap that suppresses any back flow of dirt is formed.
The dirt collection chamber 28 is provided so that the inside bottom surface 46 is takes a curved surface that has a smooth decrease in diameter in the downward direction. A recessed portion 48 that sinks downward is formed in the center of this inside bottom surface 46 of the dirt collection chamber 28. The recessed portion 48 is in a shape of a cylinder with a closed bottom, and the diameter of this recessed portion is approximately 1/2 to 1l3 of the diameter of the dirt collection chamber 28. More specifically, the diameter of this recessed portion 48 is approximately 1/2 to 1/3 of the diameter of the approximately the vertically central portion of the dirt collection chamber 28 which is substantially at the height of the baffling plate 44. As best seen from Figure 3, the central axis of the recessed portion 48 is set on the central axis A of the exhaust tube 32, thus being on the axis of the rotation of the spiral flow 36.
The curved surface of the inside bottom surface 46 of the dirt collection chamber 28 and the inside surface in the vicinity of the opening or of the opening edge 48a of the recessed portion 48 are formed so that they are not smoothly continuous (or contiguous). In other word, as best seen from Figure 3, the portion where the inside bottom surface 46 of the dirt collection chamber 28 and the opening or the opening edge 48a of the recessed portion 48 abut each other with an obtuse-angle and thus takes an obtuse-angle edge form surface or a step form surface. Since this abutting surface is thus a surface that is bent in a discontinuous form, edge form or step form from the inside bottom surface 46 to the recessed portion 48, even if the spiral flow 36 drops down along the inside bottom surface 46, this spiral flow is blocked by the opening edge 48a of the recessed portion 48, and dirt that has dropped into the recessed portion 48 is not entrained by the spiral flow. Furthermore, dirt that drops into the dirt collection chamber 28 is prevented from being entrained since such dirt dropping into the dirt collection chamber 28 is entangled with dirt that has previously been dropped in the bottom of the dirt collection chamber 28.
The dirt collection chamber 28 is detachable. In other words, as shown in Figures 1 and 2, the hook 50 provided in the vicinity of the lower end of the suction intake tube 34 is provided so that it is engaged with and disengaged from the outside of the recessed portion 48 positioned at the lower end of the dirt collection chamber 28. When the dirt collection chamber 28 is set on the suction intake tube 34 as shown in Figures 2 and 3, the dirt collection chamber 28 is fastened in place by this hook 50. When dirt that has accumulated inside the dirt collection chamber 28 is to be discarded, the hook 50 is disengaged from the recessed portion 48, the dirt collection chamber 28 is removed from the suction intake tube 34, and the dirt inside the recessed portion 48 is discharged.
While the invention has been described in terms of various preferred embodiments, the skilled artisan will appreciate the various modifications, substitutions, and changes which may be made without departing from the spirit hereof. The descriptions of the subject matter in this disclosure are illustrative of the invention and are not intended to be construed as limitations upon the scope of the invention.
Claims (16)
1. In a cyclone type dirt separator, having a suction tube at an intermediate point connecting a suction fitting and a cleaner main body of an electric vacuum cleaner, and which is adapted to separate dirt from suction air containing such dirt, and which is derived from a suction fitting, the improvement wherein said separator comprises:
a dirt separating section effective to cause suction air to form a spiral flow and to conduct air in a spiral flow to said cleaner main body, a dirt collection chamber including an inside bottom center, said chamber further including an inside bottom center and being mounted relative to said dirt separating section from below thereof whereby dirt is separated from the spiral flow and drops to collect in said dirt collection chamber, and a recessed portion formed in vicinity of said inside bottom center of said dirt collection chamber, said recessed portion being recessed downwardly.
a dirt separating section effective to cause suction air to form a spiral flow and to conduct air in a spiral flow to said cleaner main body, a dirt collection chamber including an inside bottom center, said chamber further including an inside bottom center and being mounted relative to said dirt separating section from below thereof whereby dirt is separated from the spiral flow and drops to collect in said dirt collection chamber, and a recessed portion formed in vicinity of said inside bottom center of said dirt collection chamber, said recessed portion being recessed downwardly.
2. The cyclone type dirt separator according to Claim 1, wherein said dirt separating section includes an exhaust tube having an upper and a lower end, said exhaust tube disposed substantially coaxially with a central axis of the spiral of said spiral flow, said exhaust tube adapted to exhaust air via exhaust openings formed in a circumferential surface of said exhaust tube, said lower end of said exhaust tube being closed off; and said dirt collection chamber having a substantially tubular shape extending downwardly and surrounding said exhaust tube.
3. The cyclone type dirt separator according to Claim 2, the dirt collection chamber having an inside wall, and wherein said exhaust tube is provided at said lower end thereof with a substantially flange-form baffling plate which protrudes towards said inside wall of said dirt collection chamber and suppresses a flow of air in upward and downward directions.
4. The cyclone type dirt separator according to Claim 1, 2 or 3, wherein an inside surface in the vicinity of an opening of said recessed portion and an inside bottom surface of said dirt collection chamber are formed to be contiguous to each other.
5. The cyclone type dirt separator according to Claim 4, wherein said inside bottom surface of said dirt collection chamber is defined by a curved surface, said surface having a gradual decrease in diameter in a downward direction, wherein said curved surface and an opening edge of said recessed portion forms an edge-form obtuse angle.
6. The cyclone type dirt separator according to any of claims 1 to 5, wherein said recessed portion is substantially in a cylinder form having a closed bottom.
7. The cyclone type dirt separator according to any of Claims 1 to 6, wherein a diameter of an opening of said recessed portion is approximately 1/2 to 1/3 of a diameter of that of a center of said dirt collection chamber.
8. In an electric vacuum cleaner having:
a cleaner main body provided with an electrically driven air blower;
a suction tube having opposed ends, one end thereof being connected to a vacuum suction port of said cleaner main body;
a suction fitting attached to the other of said opposed ends of said suction tube; and a cyclone type dirt separator provided at an intermediate point between said ends of said suction tube, said cyclone type dirt separator being adapted to create suction air containing dirt to be sucked in through a suction fitting and form a spiral flow to separate dirt from said air and to cause separated dirt to drop into a substantially tubular dirt collection chamber and to be collected in said dirt collection chamber; the improvement wherein said dirt collection chamber includes an inside bottom center and a recessed portion, the recessed portion formed proximate said inside bottom center of said dirt collection chamber and being recessed generally downwardly relative thereto.
a cleaner main body provided with an electrically driven air blower;
a suction tube having opposed ends, one end thereof being connected to a vacuum suction port of said cleaner main body;
a suction fitting attached to the other of said opposed ends of said suction tube; and a cyclone type dirt separator provided at an intermediate point between said ends of said suction tube, said cyclone type dirt separator being adapted to create suction air containing dirt to be sucked in through a suction fitting and form a spiral flow to separate dirt from said air and to cause separated dirt to drop into a substantially tubular dirt collection chamber and to be collected in said dirt collection chamber; the improvement wherein said dirt collection chamber includes an inside bottom center and a recessed portion, the recessed portion formed proximate said inside bottom center of said dirt collection chamber and being recessed generally downwardly relative thereto.
9. The cyclone type dirt separator according to Claim 8, wherein said cyclone type dirt separator includes an exhaust tube having an upper and a lower end, said exhaust tube disposed substantially coaxially with a central axis of the spiral of said spiral flow, said exhaust tube adapted to exhaust air via exhaust openings formed in a circumferential surface of said exhaust tube, said lower end of said exhaust tube being closed off; and said dirt collection chamber having a substantially tubular shape extending downwardly and surrounding said exhaust tube.
10. The cyclone type dirt separator according to Claim 9, wherein said exhaust tube is provided at said lower end thereof with a substantially flange-form baffling plate which protrudes towards the inside wall of said dirt collection chamber and suppresses a flow of air in upward and downward directions.
11. The cyclone type dirt separator according to Claim 8, 9 or 10, wherein an inside surface in the vicinity of an opening of said recessed portion and an inside bottom surface of said dirt collection chamber are contiguous to each other.
12. The cyclone type dirt separator according to Claim 11, wherein said inside bottom surface of said dirt collection chamber is defined by a curved surface, said surface having a gradual decrease in diameter in a downward direction, wherein said curved surface and an opening edge of said recessed portion forms an edge-form obtuse angle.
13. The cyclone type dirt separator according to any one of Claims 8 to 12, wherein said recessed portion is substantially in a cylinder form having a closed bottom.
14. The cyclone type dirt separator according to any one of Claims 8 to 13, wherein a diameter of an opening of said recessed portion is approximately 1/2 to 1/3 of a diameter of that of a center of said dirt collection chamber.
15. The cyclone dirt separator according to Claim 4, wherein said inside surface of said recessed portion and said inside bottom surface of said dirt collection chamber are formed such that each surface abuts each other to form a stepped surface.
16. The electric vacuum according to Claim 11, wherein said inside surface of said recessed portion and said inside bottom surface of said dirt collection chamber are formed such that each surface abuts each other to form a stepped surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004167203A JP2005342304A (en) | 2004-06-04 | 2004-06-04 | Cyclone type dust separater and a vacuum cleaner |
| JP2004-167203 | 2004-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2509177A1 true CA2509177A1 (en) | 2005-12-04 |
Family
ID=34937249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002509177A Abandoned CA2509177A1 (en) | 2004-06-04 | 2005-06-03 | Cyclone type dirt separator and electric vacuum cleaner |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20050268428A1 (en) |
| EP (1) | EP1602308A1 (en) |
| JP (1) | JP2005342304A (en) |
| KR (1) | KR20060048201A (en) |
| CN (1) | CN100360071C (en) |
| CA (1) | CA2509177A1 (en) |
| MX (1) | MXPA05005931A (en) |
| TW (1) | TW200608933A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008004393B3 (en) * | 2008-01-14 | 2009-07-16 | Miele & Cie. Kg | Device for separating dust from dust-laden air, in particular for use in a vacuum cleaner |
| US8997309B2 (en) | 2012-03-02 | 2015-04-07 | G.B.D. Corp. | Surface cleaning apparatus |
| US9204772B2 (en) | 2011-03-04 | 2015-12-08 | Omachron Intellectual Property Inc. | Dirt collection chamber for a surface cleaning apparatus |
| AU2013335959B2 (en) * | 2012-10-24 | 2016-03-10 | Mitsubishi Electric Corporation | Electric vacuum cleaner |
| TWI561202B (en) * | 2013-01-24 | 2016-12-11 | Mitsubishi Electric Corp | Cyclone separation device and electric cleaner using the same |
| KR102071945B1 (en) * | 2018-08-30 | 2020-01-31 | 삼성전자주식회사 | Cleaner |
| JP7185585B2 (en) * | 2019-04-08 | 2022-12-07 | 東芝ライフスタイル株式会社 | vacuum cleaner |
| CN114052600A (en) * | 2021-12-17 | 2022-02-18 | 珠海格力电器股份有限公司 | Cleaning equipment and dirt collection box thereof |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR354238A (en) * | 1904-05-16 | 1905-10-02 | John Birtwisle | Improvements to devices to extract dust from carpets, curtains, drapes and other fabrics |
| US1168175A (en) * | 1914-01-30 | 1916-01-11 | James E Deardorff | Vacuum street-cleaner. |
| US2171248A (en) * | 1935-02-21 | 1939-08-29 | Berkel Patent Nv | Vacuum cleaning apparatus |
| SE509696C2 (en) * | 1996-09-04 | 1999-02-22 | Electrolux Ab | Separation device for a vacuum cleaner |
| US6195835B1 (en) * | 1998-12-02 | 2001-03-06 | Samsung Kwangju Electronics Co., Ltd. | Vacuum cleaner having a cyclone dust collecting device |
| US6141826A (en) * | 1999-01-08 | 2000-11-07 | G.B.D. Corp. | Center air feed for cyclonic separator |
| KR20010014570A (en) * | 1999-04-23 | 2001-02-26 | 구자홍 | reduction device for the pressure of loss in cyclone dust collector |
| KR100398685B1 (en) * | 2000-11-27 | 2003-09-19 | 삼성광주전자 주식회사 | Cyclone dust-collecting apparatus for vacuum cleaner |
| KR100398684B1 (en) * | 2000-11-27 | 2003-09-19 | 삼성광주전자 주식회사 | Cyclone dust-collecting apparatus for vacuum cleaner |
| CN1148147C (en) * | 2000-12-27 | 2004-05-05 | 苏州金莱克清洁器具有限公司 | Split-type cyclone dust filter for suction cleaner |
| KR100392606B1 (en) * | 2001-03-24 | 2003-07-23 | 삼성광주전자 주식회사 | cyclone dust-collecting apparatus for vacuum cleaner |
| JP2003135336A (en) * | 2001-11-01 | 2003-05-13 | Toshiba Tec Corp | Vacuum cleaner |
| KR100445808B1 (en) * | 2002-02-28 | 2004-08-25 | 삼성광주전자 주식회사 | Cyclone-type dust collecting apparatus for a vacuum cleaner |
| US7231688B2 (en) * | 2002-10-18 | 2007-06-19 | Panasonic Corporation Of North America | Dirt cup for vacuum cleaner |
| GB2402868B (en) * | 2003-06-02 | 2006-02-01 | Samsung Kwangju Electronics Co | A cyclonic dust-collector and a handle assembly for a vacuum cleaner |
| US7329295B2 (en) * | 2004-03-17 | 2008-02-12 | Euro-Pro Operating, Llc | Light weight bagless vacuum cleaner |
| US7354468B2 (en) * | 2004-08-26 | 2008-04-08 | Euro-Pro Operating, Llc | Compact cyclonic separation device |
-
2004
- 2004-06-04 JP JP2004167203A patent/JP2005342304A/en active Pending
-
2005
- 2005-06-03 TW TW094118312A patent/TW200608933A/en unknown
- 2005-06-03 MX MXPA05005931A patent/MXPA05005931A/en not_active Application Discontinuation
- 2005-06-03 CA CA002509177A patent/CA2509177A1/en not_active Abandoned
- 2005-06-03 US US11/144,854 patent/US20050268428A1/en not_active Abandoned
- 2005-06-04 KR KR1020050048039A patent/KR20060048201A/en not_active Application Discontinuation
- 2005-06-06 EP EP05012122A patent/EP1602308A1/en not_active Withdrawn
- 2005-06-06 CN CNB2005100755924A patent/CN100360071C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA05005931A (en) | 2005-12-07 |
| KR20060048201A (en) | 2006-05-18 |
| US20050268428A1 (en) | 2005-12-08 |
| JP2005342304A (en) | 2005-12-15 |
| TW200608933A (en) | 2006-03-16 |
| CN1706334A (en) | 2005-12-14 |
| CN100360071C (en) | 2008-01-09 |
| EP1602308A1 (en) | 2005-12-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20080603 |