KR20010045600A - Cyclone dust-collecting apparatus of vacuum cleaner - Google Patents

Abstract

PURPOSE: A cyclone dust collector increases suction force of air flowing in through a suction inlet to increase centrifugal force to effectively separate dust contained in sucked air. CONSTITUTION: A dust collector includes a dust collecting case, a filter(41) and a protrusion(55). The dust collecting case has a suction inlet and a discharging outlet and forms air flowing in through the suction inlet(36) and containing dust into whirling air current to separate dust. The filter(41) is coaxially installed in the dust collecting case to pass air with dust filtered off. The protrusion(55) upwardly protrudes toward the filter(41) to prevent back flow of dust.

Description

Cyclone dust-collecting apparatus of vacuum cleaner

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cyclone dust collector of a vacuum cleaner, and more particularly, to a cyclone dust collector of a vacuum cleaner capable of separating dust contained in inhaled air more effectively and preventing the separated dust from flowing back.

The vacuum cleaner makes the inside of the main body vacuum by forcibly circulating the air by the rotation of the motor, and at this time, the air that inhales the dust and contaminants on the surface to be cleaned by the strong air flow caused by the pressure difference generated between the inside and the outside of the main body. The device is cleaned by suction.

Such vacuum cleaners are generally employed with dust bags for collecting dust and dirt from the inhaled air. The dust bag is exchangeably accommodated in the dust collecting chamber of the main body, and the user removes the collected dust by periodically changing the dust bag.

However, in such a general vacuum cleaner, if the amount of dust or contaminants collected in the dust bag is gradually increased, the suction force may be lowered to achieve a satisfactory cleaning efficiency, and this may cause an overload of the motor. Therefore, in order to prevent such a phenomenon, the user is inconvenient to replace the dust bag relatively often, and the replacement of the dust bag also causes an increase in maintenance cost.

Accordingly, in order to solve the problem caused by frequent replacement of dust bags, a vacuum cleaner employing a cyclone dust collector has recently been proposed. Examples of vacuum cleaners employing such cyclone dust collectors include Korean Utility Model Registration Application No. 1993-4891 (name: vacuum cleaner with cyclone) and Korean Patent Application No. 1993-5099 (name: vacuum cleaner). There is this. Detailed description thereof will be omitted.

By the way, the cyclone dust collectors mentioned above are relatively complicated in construction and inconvenient to use, and the present applicant has applied for a cyclone dust collector of a plurality of vacuum cleaners which has solved these problems. 1 is a cross-sectional view of a vacuum cleaner having a cyclone dust collector disclosed by the present applicant and disclosed in Korean Patent Application No. 1999-20704. The vacuum cleaner 1 having a conventional cyclone dust collector as can be seen in the drawings is largely composed of a cleaning main body, a flexible tube 5 coupled to the cleaning main body 3, and a cyclone dust collector coupled to the expansion tube 5. Apparatus 21 is provided.

The cleaning main body 3 includes a dust collecting chamber 13 in which a dust bag (not shown) is accommodated, and a load driving chamber in which a suction motor (not shown) in which the dust-containing air is sucked into the dust collecting chamber 13 is incorporated. It is divided into (16). The expansion pipe 5 has a connecting hose 9 and an extension pipe 8 coupled to the dust collecting chamber 3, and the brush 10 is coupled to the front end of the extension pipe 8. The brush 10 is in contact with a floor covering or carpet, which is the surface to be cleaned, and an inlet is formed at the bottom of the brush 19.

On the other hand, Figure 2 is an exploded perspective view of the conventional cyclone dust collector disclosed in FIG. The conventional cyclone dust collector 21 includes a cylindrical dust collecting case 23 and a filter 41 provided coaxially in the dust collecting case 23. The dust collecting case 23 is composed of a cover case 31 eccentrically fixed to the expansion tube 5 and a main body case 25 detachably coupled to the cover case 31. The cover case 31 has an upper cover 33 that is coupled to the outgoing expansion and contraction tube 5a and a lower cover 35 that is coupled to the inlet and expansion tube 5b. An outlet 32 is formed in the upper cover 33, and an inlet 34 is formed in the lower cover 35, so that the air sucked into the expansion tube 5 from the outside can be flown.

The filter 41 has a cylindrical shape, a plurality of intake holes 43 are formed in the circumferential surface, and an opening 45 is formed in one side surface. The opening 45 serves to discharge the air introduced into the filter 41 through the intake hole 43. The filter 41 also has a guide rib 49 projecting radially from the circumferential surface adjacent to the opening 45. The guide rib 49 is disposed in the cover case 31 in the horizontal direction to separate the inlet port 34 and the outlet port 32 up and down. In order to support the guide rib 49, the boss 37 is formed in the upper cover 33 and the lower cover 35 along its longitudinal direction. As a result, the air flowing through the inlet 34 of the cover case 31 is guided into the body case 25.

According to this configuration, when power is applied, air containing dirt such as dust is sucked through the inlet of the brush 10 by the suction force driven by the suction motor. Then, it flows along the inlet and outlet pipe 5b and flows into the cyclone dust collector 21. At this time, the air flowing into the cyclone dust collector 21 is the main body case 25 through the inlet 34 formed in the cover case 31, that is, the inlet 34 formed in an oblique direction with respect to the main body case 25. It flows in diagonal direction within. Thereby, the air containing the dirt, such as dust, begins to descend to the lower part of the main body case 25, forming a vortex air stream.

In this process, dirt or toilet paper having a large size of particles contained in the air is separated from the air by centrifugal force. The separated dirt, etc. are lowered on the inner wall surface of the main body case 25 and collected at the bottom. On the other hand, the air starts the reverse upward movement on the bottom surface of the main body case 25 and rotates in a relatively small rotational direction to form an upward airflow. This rising air flows through the intake hole 43 of the filter 41 and then flows into the dust collecting chamber 13 of the cleaning main body 3 through the outflow expansion and contracting pipe 5a.

On the other hand, the dirt collected in the main body case 25 also rides up in the rising airflow. However, dirt with a large particle size does not pass through the intake hole 43 of the filter 41 and falls back to the lower part of the main body case 25. Thereafter, the process of collecting and collecting the dust in the dust collecting chamber 13 of the cleaning body 3 is the same as the process of collecting and collecting the dust of the general vacuum cleaner 1.

By the way, in the cyclone dust collector 21 of the conventional vacuum cleaner 1, the vortex airflow formed in the dust collection case 23 expands in an inverted upward movement from the bottom surface, and is formed as a rising airflow having a rotation radius smaller than that of the vortex airflow. At this time, the downward air flow and the upward air flow is mixed with each other to form a turbulent flow, whereby the rotational force of the downward vortex air flow is weak, and the dust contained in the air may not be properly separated, and in the dust collecting case There is a problem that the separated dust can also flow back.

In addition, the vortex airflow formed in the dust collecting case simply depends on the shape of the suction port 35 of the dust collecting case 23, and in this case, the rotational force is almost always the same. Therefore, when the shape of the suction port 35 formed in the dust collecting case 23 is poor or deformation occurs, the rotational force of the vortex air flow formed in the dust collecting case 23 may be weak. On the other hand, even if the state of the suction port 35 of the dust collecting case 23 is good, if the size or shape of the dust collecting case 23 is changed, the rotational force of the vortex airflow can be weakened.

In such a case, that is, when the rotational force of the vortex airflow is weak, the conventional cyclone dust collector 21 cannot effectively separate the dirt contained in the air, and the amount of dirt collected in the dust bag increases. As a result, the dust bag must be frequently replaced, while overload of the suction motor may occur due to dirt collected in the dust bag.

Accordingly, an object of the present invention, in consideration of these problems in the prior art, by increasing the centrifugal force by increasing the suction force of the air flowing through the suction port, it is possible to effectively separate the dust contained in the intake air, and at the same time It is to provide a cyclone dust collector of a vacuum cleaner that can prevent backflow.

1 is a perspective view of a cleaner having a conventional cyclone dust collector,

2 is a cross-sectional view of the cyclone dust collector of FIG.

3 is an exploded perspective view of a cyclone dust collector of a cleaner according to the present invention;

4 is a cross-sectional view of the combination of FIG.

5 is an enlarged partial view of FIG.

6 is a cross-sectional view of a cyclone dust collector according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

5a, 5b: Expansion pipe 3: Cleaning basic body

13: dust collecting chamber 31: cover case

32: outlet 33: top cover

34, 37: extension tube 36: suction port

35: lower cover 41: filter

44: extension portion 47: through hole

46a, 46b, 48: flange 49: guide rib

53: main body case 55. 59: projection

61: engaging portion 63: rocker support

66: rocker 68: elastic spring

71: retaining ring 73: coupling jaw

83: body case inlet

In accordance with the present invention, a cyclone dust collector of a vacuum cleaner, comprising: a dust collecting case having an inlet and an outlet and separating dust by forming a dust-containing air flowing through the inlet into a vortex air stream; And a filter installed coaxially in the dust collecting case and allowing the dust separated air to pass therethrough. It is achieved by a cyclone dust collector of the vacuum cleaner, characterized in that it comprises a protrusion projecting upward toward the filter from the bottom surface of the dust collecting case.

Here, the dust collecting case has a cylindrical shape; The suction port is formed on a circumferential surface of the dust collecting case; The outlet is open at one side surface of the dust collecting case; The protruding portion is preferably configured to be formed on the other side of the plate facing the outlet.

At this time, the protrusion may be configured such that the lower region extends in the cross-sectional radius direction compared to the upper region.

On the other hand, the vacuum cleaner, the cleaning main body with a built-in suction motor for sucking the outside dust-containing air into the dust collecting case through the suction port; And a flexible tube detachable to the cleaning main body and having a brush coupled to the surface to be cleaned at the distal end thereof. The dust collecting case may be disposed at the upstream side of the suction means in the expansion pipe or the cleaning main body.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. In this case, the same reference numerals are used for the same configurations and names as described above.

3 is an exploded perspective view of a cyclone dust collector of a cleaner according to the present invention, FIG. 4 is a cross-sectional view of FIG. 3, and FIG. 5 is a partially enlarged view of FIG. 4. As can be seen from these figures, the cyclone dust collector 51 is coaxially installed in the cylindrical dust collecting case 52 and the dust collecting case 52 which are biaxially arranged with respect to the expansion pipe 5. It is provided with a filter 41. The dust collecting case 52 includes a cover case 31 which is fixed to the expansion tube 5 eccentrically, a main body case 53 detachable from the cover case 31, a cover case 31 and a main body case 53. ) Is configured as a coupling portion (61) for detachably coupling.

The main body case 53 has a substantially cylindrical shape, one side of which is open, and the other side of which is closed. The body case 53 is coupled to the cover case 31, as will be described later in detail, wherein the opening 54 is introduced into the body case 53 and serves as an outlet of air passing through the filter 41. Perform. On the other side of the main body case 53, an inwardly protruding portion 55 is formed.

The cover case 31 has an upper cover 33 that is coupled to the outgoing expansion and contraction tube 5a and a lower cover 35 that is coupled to the inlet and expansion tube 5b. The upper cover 33 has an outlet 32 formed eccentrically to one side with respect to the center. The outlet 32 is formed with an upper extension pipe 34 accommodated in the outflow extension pipe 5b. On the outer surface of the upper extension pipe 34, a coupling pin 37 providing an outward elastic force protrudes in a radial direction. On the other hand, the outflow expansion pipe (5b) is formed with a defect groove (6a) for receiving the coupling pin (38a) of the upper extension pipe (34). By these defect pins 38a and the defect grooves 6a, the upper cover 33 can be eccentrically fixed to the expansion tube 5.

The lower cover 35 is also provided with a suction port 36 which is eccentric with respect to the center and faces the discharge port 32 of the upper cover 33. The suction port 36 is formed with a lower extension pipe 37 accommodated in the inlet and outlet pipe 5b. A defect groove 6b is formed on an outer surface of the lower extension tube 37, and a coupling pin 38b that provides an outward elastic force is protruded in a radial direction on the outer surface of the inlet and expand tube 5b. Thereby, the lower cover 35 can also be fixed to the expansion pipe 5a eccentrically.

The lower cover 35 also has a through hole 47 formed parallel to the suction port 36 on one side adjacent to the suction port 36. The inlet 36 and the opening edge of the through hole 47 are integrally formed with a flange portion 48 which protrudes upward, and the curved portion 50 is moved from the outer flange portion of the inlet 38 toward the through hole 47. Forming. The curved portion 50 serves to guide the air introduced through the suction port 38 toward the through hole 47.

The body case 53 is coupled to the through hole 47 of the lower cover 35. To this end, the inlet flange portion 46a is formed at the edge of the through hole 35 to be extended downward and accommodated in the upward outlet of the main body case 53. Further, it further includes an outer flange portion 46b extending downwardly in parallel with the inflow flange portion 46a to accommodate the edge of the upstream outlet of the body case 53 therebetween. On the other hand, the lower cover 35 is formed with a plurality of through grooves 39 at predetermined intervals along the longitudinal edges thereof. Correspondingly, a plurality of fastening holes corresponding to the plurality of through holes 39 of the lower cover 35 are formed in the upper cover 33. These through grooves 39 and the fastening hole are coupled to each other by a screw 40 fastened upward from the lower side. As a result, the upper cover 33 and the lower cover 35 may be coupled to each other.

The filter 41 has a cylindrical shape, a plurality of intake holes 43 are formed in the circumferential surface, and an opening 45 is formed in the upper side surface. The opening 45 serves to discharge the air introduced into the filter 41 through the intake hole 43. The guide rib 49 extends radially from the edge of the opening 45 in the filter 41. The guide rib 49 has an extension portion 44 whose one side extends in the plate surface direction as compared to the other side. The guide rib 49 is disposed in the cover case 31 in the horizontal direction such that the extension 44 corresponds to the inlet 36 of the lower cover 53. As a result, the filter 41 may be disposed coaxially with the main body case 53 in the upper region of the main body case 53.

As such, the guide rib 49 disposed in the cover case 31 is divided into the inlet port 36 of the lower cover 35 and the outlet port 32 of the upper cover 33 up and down. Then, an air flow path 81 is formed between the inlet 36 and the through hole 47 of the lower cover 35, and at this time, the opening 83 formed in the distal region of the air flow path 81 is formed in the main body. It serves as a suction port of the case (53). The suction port 36 of the main body case 53 forms a spiral shape having a predetermined inclination angle with respect to the center of the main body case 53.

As a result, the air flowing through the suction port 36 of the lower cover 35 is guided by the curved portion 50 and flows along the flow path between the suction port 36 and the through hole 47, and at the end of the flow path. It is introduced into the Bonke case 53 through the suction port 83 of the formed body case 53. At this time, the air flowing into the main body case 53 flows out by forming the vortex airflow to the lower region of the main body case 53 by the shape of the suction port 83.

On the other hand, the coupling portion 61, a pair of rocker support portion 63 formed on both sides of the upper portion of the main body case 53, the locker 66 hinged to the rocker support portion 63 so as to be pivoted up and down and The locker groove 70 is formed on the outer flange portion 46b of the lower cover 35 and engaged with the locker 66. The rocker support portion 63 has a substantially 'U' shape, and a pair of hinge holes 64 are formed in the upper region, and the spring support protrusion 65 protrudes in the lower region. The locker 66 has a pair of hinge protrusions 57 which protrude to both sides and are rotatably received in the hinge holes 64, respectively. As a result, the locker 66 can rotate up and down about the hinge protrusion 57.

On the inner side of the locker 66, a spring support protrusion (not shown) corresponding to the spring support protrusion 65 of the rocker support portion 63 is formed. An elastic spring 68 is interposed between these spring support protrusions 65, whereby the locker 66 is elastically urged in the engagement direction with the rocker groove 70. On the other hand, at the upper end of the locker 66, a hook portion 69 engaged with the locker groove 70 is formed.

Coupling portion 61 is also projected from the lower region of the fixed ring 71 and the main body case 53 and the fixed ring 71 is fixed to the circumferential surface of the inlet and outlet pipe (5b) coupled to the coupling ring (73) It includes. The fixing ring 71 is fixed to the inlet and outlet pipe 5b by a predetermined fastening means such as a screw, and has a rail 72 protruding toward the main body case 53 to form a slide groove in the vertical direction. On the other hand, the engaging jaw (73) has a slider 74 that protrudes outward and is received in the slide groove of the rail (72).

In order to couple the main body case 53 to the cover case 31, first, the main body case 53 is replaced with the lower region of the cover case 31. Then, the slider 74 of the engaging jaw 73 formed in the lower region of the main body case 53 corresponds to the slide groove of the rail 72 formed in the inlet and outlet pipe 5b, and the lower cover 35 The opening edge of the main body case 53 is approached between the inflow flange portion 46a and the outer flange portion 46b. Then, if the slider 74 is simply moved along the longitudinal direction of the slider groove, the hook portion 69 of the locker 66 installed in the upper region of the main body case 53 is the outer flange portion of the lower cover 35. The body case 53 is coupled to the cover case 31 while being inserted into the locker groove 70 formed in the 46b.

On the other hand, when separating the main body case 53 from the cover case 31, it presses downwardly simply, pressing the lower area | region of both lockers 66. As shown in FIG. Then, the engagement between the hook 69 of the locker 66 and the locker groove 70 is released, while the slider 74 is disengaged from the slide groove of the rail 72. At this time, dust and dirt collected in the separated body case 53 can be easily discarded.

Hereinafter, the operation of the cyclone dust collector 51 of the present vacuum cleaner having such a configuration will be described. When power is applied and suction power is generated by driving of the suction motor, dust-containing air flows along the inlet and outlet pipe 5b and is sucked into the cyclone dust collector 51. This intake air descends while forming a vortex air stream along the circumferential direction of the main body case 53 with respect to the filter.

At this time, the protruding portion 55 protruding from the bottom surface of the main body case 53 to face the filter 41 in the upper region serves to maintain the shape of the vortex airflow descending from the upper region. On the other hand, the downdraft starts the reverse upward movement on the bottom surface of the main body case 53, and rotates with a relatively small rotation radius, thereby forming the upward airflow. In this case, the projection 55 assists in the formation of the rising airflow, thereby preventing the falling vortex air stream and the air stream rising at a smaller radius of rotation than the falling vortex air stream from being mixed with each other to form a turbulent flow.

Therefore, a smooth air flow is formed in the main body case 53, so that dust mixed in the air can be separated more effectively. Then, the turbulence is formed in the lower region of the conventional body case, the reverse flow phenomenon of the dust separated from the generated air is eliminated.

On the other hand, the rising air flows through the intake hole 43 of the filter 41, and then flows into the dust collecting chamber (13 in FIG. 1) of the cleaning main body (3 in FIG. 1) through the outflow expansion and contracting pipe 5a. On the other hand, the dirt collected in the main body case 53 also rides on the rising air and rises. However, the dirt and the like having a large particle size do not pass through the intake hole 43 of the filter 41 and fall back to the lower part of the main body case 53.

After that, the process of collecting and collecting dust in the dust collecting chamber 13 of the cleaning body 3 is the same as the process of collecting and collecting dust of a general vacuum cleaner (1 in FIG. 1).

On the other hand, in the cyclone dust collector according to the present invention, another embodiment for achieving the above object can be implemented. 6 is a cross-sectional view of a cyclone dust collector according to another embodiment of the present invention. As can be seen in the figure, the cyclone dust collector according to the present embodiment has the same configuration as the above-described embodiment. However, the shapes of the protrusions 59 protruding from the bottom surface of the main body case 53 are different. The protrusion 59 has its lower region reduced in the cross-sectional radius direction compared to the upper region.

The protrusion 59 of such a configuration also maintains the shape of the vortex airflow descending from the upper region, and also assists the formation of the airflow rising from the bottom surface of the body case 53 with a rotation radius smaller than the descending vortex airflow. Do this. By the way, since the upward airflow which rotates along this protrusion part 59 becomes small gradually as the radius of the protrusion part 59 goes to an upper area | region, it raises and the rotational speed gradually increases.

As such, when the rotational force of the rising airflow is increased, the rotational force of the falling vortex airflow is also increased, whereby even relatively fine dust contained in the air can be separated and collected. In this case, in the lower region of the main body case 53, turbulent phenomena in which the descending vortex air flow and the air flow rising at a smaller radius of rotation than the lower vortex air flow are mixed with each other are eliminated, and from the air in the main body case 53, The backflow of the separated dust is eliminated.

As described above, according to the present invention, a vacuum cleaner in which a turbulent shape generated by mixing a swirling air flowed down through the suction port and a rising air flow from the bottom surface is removed, thereby preventing backflow of dust separated from air. Cyclone dust collecting device is provided.

The cyclone dust collector of the vacuum cleaner also increases the rotational force of the vortex air flow formed while being sucked through the suction port, thereby effectively separating the dust contained in the suction air.

Claims (5)

In the cyclone dust collector of the vacuum cleaner, A dust collecting case having an inlet and an outlet and separating dust by forming dust-containing air flowing through the inlet into a vortex air stream; And A filter installed coaxially in the dust collecting case and allowing the dust separated air to pass therethrough; And a projection protruding upward from the bottom surface of the dust collecting case toward the filter. The method of claim 1, The dust collecting case has a cylindrical shape; The suction port is formed on a circumferential surface of the dust collecting case; The outlet is open at one side surface of the dust collecting case; The protruding portion is formed on the other side of the plate facing the outlet, the cyclone dust collector of the vacuum cleaner. The method of claim 1, The protruding portion is a cyclone dust collector of the vacuum cleaner, characterized in that the lower region is extended in the cross-section radius direction than the upper region. The method of claim 1, The vacuum cleaner, A cleaning main body with a built-in suction motor for sucking outside dust-containing air into the dust collecting case through the suction port; And A flexible tube detachable from the cleaning body and having a brush coupled to a surface to be cleaned at a distal end thereof; The dust collecting case is a cyclone collector of the vacuum cleaner, characterized in that installed in the expansion pipe. The method of claim 1, The vacuum cleaner, A cleaning main body with a built-in suction motor for sucking outside dust-containing air into the dust collecting case through the suction port; And And a stretchable tube detachable to the cleaning body and having a brush coupled to the surface to be cleaned at the distal end thereof; And said dust collecting case is disposed upstream of said suction means in said cleaning body.