JP3857974B2 - Vacuum cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum cleaner in which a second dust separation unit for separating dust that has passed through the first dust separation unit is provided on the downstream side of the first dust separation unit for separating dust in the sucked dust-containing air. .
[0002]
[Prior art]
Conventionally, in a vacuum cleaner, in order to prevent the electric blower from sucking dust, a second dust separator is provided on the downstream side of the first dust separator (see, for example, Patent Document 1).
[0003]
The vacuum cleaner of Patent Document 1 divides the inside of a cylindrical dust collector body into a lower dust collection chamber and an upper dust collection chamber by a horizontal partition plate, and these two chambers are exhausted at the central portion of the partition plate. An exhaust fan (electric blower) is attached to the upper end opening of the upper dust collection chamber. A tangential suction port is provided at the upper part of the lower dust collection chamber, and the suction port and the lower dust collection chamber form a cyclone type first dust separation portion. A filter that covers the intake side of the exhaust fan is provided in the upper dust collection chamber, and the second dust separation portion is formed by this filter and the upper dust collection chamber.
[0004]
In this vacuum cleaner, the dust in the dust-containing air sucked from the suction port by the operation of the exhaust fan is also centrifuged at the first dust separator and serves also as a dust collection container attached to the lower end of the lower dust collecting chamber. While being stored in the bottom cover, the air in the first dust separation part flows into the upper dust collection chamber of the second dust separation part from the exhaust pipe, passes through the filter and is sucked into the exhaust fan, and then discharged to the outside. The In this case, the filter filters dust contained in the air.
[0005]
Thus, the structure which provided the 1st dust separation part in the upstream of the filter which capture | acquires the dust which passed the 1st dust separation part is preferable at the following points. In other words, in the configuration without the first dust separation part, large dust to be removed by the first dust separation part adheres to the filter, so that it becomes an equivalent state when the filter is clogged due to this large dust. However, by providing the first dust separation unit, large dust can be removed in advance by this separation unit, so that it is possible to prevent the filter from being apparently clogged.
[0006]
[Patent Document 1]
Microfilm (No. 3-5, Fig. 1) of No. 60-157686 (No. 62-66755)
[0007]
[Problems to be solved by the invention]
The cyclone type first dust separation part of Patent Document 1 and the bottom lid for collecting the dust separated here are made without separation, but are lined up and down, and this direction is the same as this direction. A filter as the second dust separation unit is disposed in a posture orthogonal to the direction. In this configuration, the diameters of the first dust separator, the bottom cover, and the filter are all limited by the diameter of the cylindrical dust collector cylinder, and are approximately the same size.
[0008]
Thus, in the electric vacuum cleaner of Patent Document 1, the filter that filters the dust that has passed through the first dust separation portion cannot be made large unless the cylindrical dust collector body and thus the main body of the vacuum cleaner are made large. Filter clogging is likely to occur early. As a result, the maintenance interval required by the user, such as washing the filter with water and regenerating it, or replacing it with a new filter, is short, and improvements are required. Furthermore, in a vacuum cleaner that performs cyclonic separation, which is a kind of inertial separation, as in Patent Document 1, dust air is introduced into the suction port of the lower dust collection chamber due to an increase in air path resistance caused by clogging of the filter. As the force for sucking in decreases, the effect of separating dust decreases, and the cleaning performance tends to decrease.
[0009]
The problem to be solved by the present invention is to improve the maintainability of the filter element that performs filtration and separation in the second dust separation part while suppressing the deterioration of the cleaning performance based on the inertia separation action in the first dust separation part. To get a vacuum cleaner.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a first dust that separates air and dust flowing through an air passage from the suction port of the cleaner body to the intake port of the electric blower by inertia separation. A negative pressure chamber portion provided with a separation portion therein, and dust separated in the first dust separation portion and arranged in parallel with the negative pressure chamber portion in the vertical direction, the horizontal direction, or the diagonal direction of the cleaner body. A dust storage part for storing, a wall which partitions the dust storage part and the negative pressure chamber part and has a connection hole and which is covered with a filter and has a ventilation opening communicating the negative pressure chamber part and the dust storage part ; And a second dust separation part that is provided on the downstream side of the first dust separation part and that separates the dust that has passed through the first dust separation part. A separating portion extending in a direction in which the first dust separating portion and the dust storage portion are arranged; It is disposed over at least a part of the projection area behind the dust reservoir and within the projection area behind the first dust separator, and passes through the first dust separator and does not pass through the dust reservoir. The airflow flowing toward the rear of the vacuum cleaner body and the airflow sucked from the ventilation opening through the dust storage portion through the connection hole into the negative pressure chamber portion are passed from the front side to the filter element. The filter element is characterized by capturing fine dust.
[0011]
In the present invention, the first dust separator may be any one that can separate air and dust by inertia separation without using a filter medium, but assists the first dust separator with a filter medium that performs filtration separation after this separation. It is not a hindrance that it is attached. Here, the dust separation portion that performs inertia separation action is a straight-flow type inertial separation device that performs separation using a difference in inertia force based on the difference in kinetic energy between air and dust, or the inertia force Examples include a cyclone inertial separation device that performs centrifugal separation using the difference. The latter cyclone type inertial separation device includes a straight flow type cyclone type device that causes an air flow to flow in the direction of the swirl flow . Further, in the present invention, the mat-like filter element is formed by laminating a single layer or plural kinds of filter media such as paper, cotton, cloth, glass wool, non-woven fabric, and foamed synthetic tree to obtain a flat plate filter or an expansion type pleated filter. And the like, and it is not hindered to provide a surface processed layer having a low coefficient of friction that suppresses the adhesion of dust to the surface on at least the upstream surface of the filter element. In the present invention, the arrangement direction of the first dust separating portion and the dust reservoir portion may be any of the vertical (vertical) direction, the left and right (width) direction, or the oblique direction of the cleaner body. Moreover, in the present invention, the term “inside the projection area of the first dust separation unit” includes both the entire projection area and a part of the projection area. In the present invention, it is not hindered to provide a dust dropping means for the filter element of the second dust separation unit.
[0012]
In the present invention, attention is paid to the fact that the dust reservoirs are arranged with respect to the first dust separator, the second dust separator is extended in this arrangement direction, and the second dust separator is used as the first dust separator. And a mat-like filter element that filters the dust that has passed through the first dust separator, since it is disposed not only in the projection area of the part but also in at least a part of the projection area of the dust reservoir. Two dust separation parts can be enlarged.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0014]
One end of a flexible dust suction hose 21 is detachably connected to a vacuum cleaner main body 20 provided in the electric vacuum cleaner denoted by reference numeral 10 in FIG. 1, and the hose 21 is provided with a hand operating portion 22 at the other end. ing. A telescopic extension tube 23 is detachably connected to the hand operation unit 22, and a suction port body 24 is detachably connected to a distal end portion of the extension tube 23. The hand operating unit 22 has a handle 22A, and the handle 22A is provided with an operation switch 22B for remote operation.
[0015]
As shown in FIGS. 1 to 3, the cleaner main body 20 includes a main body case 30, a dust collection container (dust cup) 50 that is detachably attached to the main body case 30, and a lid body 40. The rear portion of the lid 40 is hinged to the front portion of the main body case 30 so as to be opened and closed in the vertical direction.
[0016]
The main body case 30 includes a rear electric part 34 and a front mounting part 35. As shown in FIG. 2, the electric blower 33 has a built-in electric blower 33, and an intake port 33 </ b> A of the electric blower 33 is mostly on the upper side of the electric drive 34. The mounting portion 35 is integrally projected forward from the lower portion of the electric portion 34 and is formed in a dish shape having a concave shape that opens upward. A dust collecting container 50 is detachably mounted on the mounting portion 35. By closing the lid body 40, the lid body 40 and the mounting portion 35 sandwich and fix the dust collecting container 50.
[0017]
As shown in FIG. 3B, the front surface of the electric motor 34 is opened, and the opening 34 </ b> A is opposed to and communicates with the air inlet 33 </ b> A of the electric blower 33. The opening 34A is provided with a filter presser 34B having radial ribs for pressing a filter 80 described later from the downstream side.
[0018]
On both side walls in the width direction of the main body case 30, oblique bulging portions 36 (only one shown) extending from the front upper portion to the rear lower portion of the main body case 30 are integrally formed. A rear wheel 37 is rotatably attached. Exhaust portions 38 each having a plurality of exhaust holes are provided in front portions of both bulged portions 36 and both side walls of the main body case 30. These exhaust portions 38 communicate with an exhaust port 33B (see FIG. 2) of the electric blower 33 through an exhaust air passage (not shown). The air exhausted from the exhaust port 33B of the electric blower 33 is exhausted from the exhaust part 38 through the exhaust air passage.
[0019]
A battery 39 (not shown) is built in the electric part 34 of the main body case 30 so as to be located below the electric blower 33. The electric power of the battery 39 is supplied to the electric blower 33 and the like. It is also possible to arrange a cord reel at the same portion instead of the illustrated battery and supply electric power from a commercial AC power source to the electric blower 33 and the like through this reel.
[0020]
The lid body 40 includes a top plate 41 formed in a substantially elliptical shape in plan view, and a peripheral wall 42 formed integrally around the top plate 41. A connection pipe 44 (see FIG. 2) having a suction port 43 for detachably connecting the dust suction hose 21 is provided at the front portion of the peripheral wall 42. The connection pipe 44 extends in the front-rear direction, and one end opening (front end) forms a suction port 43 and the other end (rear end) 45 is open.
[0021]
As shown in FIGS. 4 to 6, the dust collecting container 50 has an opening 51 formed by opening substantially the entire rear surface located on the right side in FIG. Further, the dust collecting container 50 includes a container case body 53 having an intake inlet 52 on the front wall 50 a facing the opening 51, and a handle portion 54 provided in the container case body 53. For example, the handle 54 is positioned below the intake inlet 52 and is integrally formed with the wall 50a.
[0022]
The container case body 53 includes a dust storage part (dust collection part) 55 formed at the lower part of the case body 53 and a negative pressure chamber part (negative pressure space) formed so as to be arranged mainly above the dust storage part 55. 56, a first dust separation portion 61 provided in the negative pressure chamber portion 56, and a guide portion 63 that guides the dust separated by the dust separation portion 61 to the dust reservoir 55. The 1st dust separation part 61 and the dust storage part 55 are arranged in parallel up and down.
[0023]
The bottom surface of the dust reservoir 55 is open. A bottom plate 57 is attached to the bottom of the dust storage portion 55 so as to be openable and closable around the axis J, and dust accumulated in the dust storage portion 55 can be discarded by opening the bottom plate 57. The closed state of the bottom plate 57 is released through a mechanism (not shown) that is interlocked with the pressing of the operation button provided on the handle portion 54. In FIG. 4, reference numeral 74 denotes an annular sealing material fixed to the inner surface of the bottom plate 57, and thereby the airtightness of the lower end portion of the dust storage portion 55 in a state where the bottom plate 57 is closed is achieved.
[0024]
The dust storage portion 55 and the negative pressure chamber portion 56 are partitioned by a standing wall 60 that is close to the opening 51 and a ceiling wall 58 that is bent from the upper end of the wall 60 and continues to the wall 50a. Both the standing wall 60 and the negative pressure chamber 56 above this face the opening 51. The ceiling wall 58 of the dust reservoir 55 is formed with a vent opening 59 that allows the dust reservoir 55 and the negative pressure chamber 56 to communicate with each other. The ventilation opening 59 is provided so as to face the substantially central portion of the dust storage portion 55. A filter F1 made of, for example, a net is attached to the ventilation opening 59 as shown in FIG.
[0025]
A connection hole 58A (see FIG. 5) is formed on the ceiling wall 58 on the upright wall 60 side. Below the connection hole 58A, a guide wall 55G (see FIG. 4) for generating a swirling flow in the dust reservoir 55 is provided.
[0026]
The first dust separation unit 61 forms a straight flow type inertial separation device that separates air and dust by an inertial separation action, and includes a cylindrical air passage forming body 62 that forms a separation air passage 62a, And a guide part 63.
[0027]
As shown in FIGS. 5 and 6, the air passage forming body 62 has a hollow frustum shape in which one end and the other end are opened, and has a plurality of separation openings 64 at equal intervals over the entire circumference thereof. The filter F2 (see FIGS. 2 and 4) that closes the separation openings 64 is provided. Specifically, the air passage formation body 62 includes a frame configured by a pair of large and small circular frame portions W1 and W2 and a plurality of ribs W3 connecting the frame portions W1 and W2. Each separation opening 64 is formed in a space surrounded by both frame portions W1, W2 and a rib W3. The filter F2 is made of, for example, a net and is attached in a cylindrical shape along the inner peripheral surface of the frame. Therefore, the air path formation body 62 has a structure in which both ends in the axial direction are opened, and a separation air path 62a surrounded by the formation body 62 is formed.
[0028]
The separation air passage 62a extends linearly in the axial direction of the cleaner body 20 (the front-rear direction in the present embodiment). The separation air passage 62a is connected to the air inlet 33A of the electric blower 33 through the separation opening 64 of the air passage formation body 62, the negative pressure chamber portion 56 of the container case body 53, and the opening 34A of the electric portion 34 of the main body case 30 sequentially. Communicating with
[0029]
As shown in FIG. 4, the diameter of the large-diameter end opening 62 </ b> A of the air passage forming body 62 is formed larger than the diameter of the intake inlet 52 of the container case body 53. The air passage forming body 62 is connected to the container case body 53 so that the intake inlet 52 is positioned inside the one end opening 62A. The diameter of the small-diameter other end opening 62 </ b> B of the air passage forming body 62 is formed substantially the same as the diameter of the intake inlet 52. As a result, the diameter of the air passage forming body 62 gradually decreases linearly from one end to the other end. The diameter of the other end opening 62 </ b> B of the air passage forming body 62 may be smaller than the diameter of the intake inlet 52.
[0030]
The axis line of the air passage forming body 62 and the axis line of the connection pipe 44 of the lid body 40 are substantially linearly arranged, and the air inlet 33A of the electric blower 33 is provided on these axis extension lines so as to face each other. The connection pipe 44 of the lid 40, the intake inlet 52 of the container case body 53, the air passage forming body 62, the opening 51 of the container case body 55, and the intake port 33 </ b> A of the electric blower 33 are substantially at the same height position. Are sequentially arranged along the axial direction of the cleaner body 20 (the front-rear direction in the present embodiment).
[0031]
As shown in FIGS. 4 to 6, the guide portion 63 is provided continuously to the other end opening 62 </ b> B of the air passage forming body 62. Specifically, the guide portion 63 is inclined from the upper part of the other end opening 62B of the air passage forming body 62 and extends obliquely downward, and is curved from one end of the inclined wall portion 63A and extends downward and wind. It has an air blowing wall portion 63B facing the other end opening 62B of the path forming body 62, and an inclined wall portion 63A and side wall portions 63C formed on both sides of the air blowing wall portion 63B. The guide portion 63 has an opening 63D joined to the other end opening 62B of the air passage forming body 62.
[0032]
The lower portion of the guide portion 63 is formed in a cylindrical shape and extends in the vertical direction, for example, and is connected to the ceiling wall portion 58 and the standing wall 60 so as to cover the connection hole 58A. By this connection, the guide portion 63 communicates the separation air passage 62a with the dust storage portion 55.
[0033]
The standing wall 60 is provided slightly inside (front side) of the opening 51 of the container case body 53 to give the opening 51 a predetermined depth H (see FIG. 4). Using this depth H, a filter 80 forming a second dust separation part is detachably mounted in the opening 51.
[0034]
As shown in FIGS. 4 to 6, the filter 80 includes a filter frame 81 and a filter element 82 that is attached by covering the entire inside of the frame 81. The filter element 82 is formed by matting the filter medium. In particular, in the present embodiment, a pleated filter element that is pleated to expand the filtration area is used. The mesh of the filter element 82 is finer than that of the filters F1 and F2 in the previous stage.
[0035]
The filter 80 is sized so as to be fitted into the opening 51 of the container case body 53. Therefore, the filter 80 extends in the direction in which the negative pressure chamber portion 56 in which the first dust separation portion 61 is built in and the dust reservoir portion 55 arranged below the first pressure separation portion 61, and is attached by being fitted into the opening 51. The first dust separation unit 61 is disposed over the entire projection area behind the negative pressure chamber 56 and the majority of the projection area behind the dust reservoir 55. In other words, the upper part of the filter 80 attached to the container case body 53 is opposed to the negative pressure chamber part 56 and the first dust separating part 61 therein, and the lower part of the filter 80 is a large part of the standing wall 60. Close to and opposite the part. Further, as shown in FIGS. 5 and 6, the filter 80 is disposed in the opening 51 so that the fold of the pleated filter element 82 extends in the vertical direction.
[0036]
The depth of fitting of the filter 80 into the opening 51 of the container case body 53 is defined by a restricting means provided in the container case body 53, for example, a step portion 53A formed on the ceiling portion of the container case body 53 as shown in FIG. Regulated by the root 53B of the standing wall 60, the filter 80 is mounted upright, more preferably tilted and tilted forward at an angle close to vertical, for example. Here, the forward tilt refers to a state in which the entire filter 80 or the upper end of a filter element 82 described later is tilted from the lower end so as to protrude to the upstream side based on the airflow passing through the filter 80. Due to the fitting restriction, a gap G is formed between the lower portion of the filter 80 and the upright wall 60 that is much narrower and has a smaller air passage cross-sectional area than the upper negative pressure chamber portion 56.
[0037]
Next, operation | movement of the vacuum cleaner 10 comprised as mentioned above is demonstrated.
[0038]
After the dust collecting container 50 is placed on the placing portion 35 of the main body case 30 as shown in FIG. 3A, the cover plate 40 is closed as shown in FIG. 2, and then the dust suction hose as shown in FIG. 21 is connected to the suction port 43 of the lid 40. The suction port body 21 is already connected to the dust suction hose 21 via the extension pipe 23.
[0039]
In this state, when the operation switch 22B of the hand operation unit 22A is operated to drive the electric blower 33, the negative pressure chamber 56 of the container case body 53 becomes negative pressure through the opening 34A of the main body case 30. This negative pressure is generated by the separation opening 64 of the air passage formation body 62, the separation air passage 62a of the air passage formation body 62, the intake inlet 52 of the container case body 53, the connection pipe 44 of the lid body 40, the dust suction hose 21, and the extension pipe 23. , And the suction port body 21 in order, dust is sucked together with air from the suction port body 21.
[0040]
The sucked dust and air are sucked into the suction port 43 of the lid body 40 through the extension pipe 23 and the dust suction hose 21. The dust and air sucked into the suction port 43 are sucked into the separation air passage 62 a of the air passage formation body 62 of the first dust separation portion 61 through the intake inlet 52 of the dust collecting container 50.
[0041]
Part of the air sucked into the separation air passage 62a passes through the first filter F2 of the separation opening 64 of the air passage formation body 62 and is sucked into the negative pressure chamber portion 56 of the container case body 53, and further the container case body 53. The air is sucked into the intake port 33A of the electric blower 33 through the filter 80 attached to the opening 51.
[0042]
In the air suction described above, dust having a mass larger than a predetermined value sucked into the separation air passage 62a extending linearly in the front-rear direction of the cleaner body 20 is suddenly changed in direction due to its inertia. 64 is not allowed. For this reason, the dust having the mass is separated from the air passing through the separation opening 64, travels straight through the separation air passage 62 a, collides with the air blowing wall portion 63 </ b> B of the guide portion 63, and is disposed along the guide portion 63. 55 is introduced.
[0043]
At the same time, a part of the air is introduced into the dust reservoir 55 through the guide portion 63 in the same manner as the dust having the mass. The air thus introduced becomes a downward swirling flow that rotates along the inner peripheral surface of the dust reservoir 55 by the guide wall 55G. For this reason, the dust introduced into the dust reservoir 55 is accumulated while being compressed along the lower inner peripheral surface of the dust reservoir 55 by the swirl flow. Then, the air that has been introduced into the dust reservoir 55 and turned into a swirling flow rises and reverses in the central portion of the dust reservoir 55 and passes through the ventilation opening 59 of the ceiling wall 58 of the dust reservoir 55. Sucked into the negative pressure chamber 56 of the body 53.
[0044]
On the other hand, the light dust does not travel straight through the separation air passage 62a in the air passage formation body 62 of the first dust separation portion 61, but passes through the filter F2 of the separation opening 64 by the negative suction pressure of the electric blower 33. Is attached to the inner peripheral surface of the filter F2. When clogging of the filter F2 increases due to such light dust adhesion, the air volume passing through the filter F2 decreases. However, the negative pressure in the negative pressure chamber portion 56 is increased by this decrease, and the negative pressure in the dust storage portion 55 is also increased through the vent opening 59 of the ceiling wall 58. For this reason, the wind speed and the air volume of the air traveling straight in the separation air passage 62a are increased.
[0045]
Thus, when the wind speed that goes straight through the separation air passage 62a increases, it becomes easy for the air that goes straight to remove dust attached to the filter F2. At this time, the diameter of the cylindrical air passage forming body 62 gradually decreases from the upstream opening 62A to the downstream opening 62B, so that the wind straightly traveling through the separation air passage 62a can be applied to the entire surface of the filter F2. And flow while being drawn toward the center of the separation air passage 62a. For this reason, the dust adhering to the inner surface of the filter F2 can be more easily peeled off. The dust thus peeled is introduced into the dust reservoir 55 through the guide portion 63 in the same manner as dust having a large mass, and is accumulated by being centrifuged from the air in the dust reservoir 55.
[0046]
As described above, even if the amount of air passing through the filter F2 decreases due to clogging, the amount of air that goes straight through the separation air passage 62a increases, so the amount of air sucked by the electric blower 33 is kept substantially constant. For this reason, it is possible to always suck dust with a predetermined suction force regardless of the clogging of the filter F2.
[0047]
Furthermore, the first dust separation unit 61 does not rotate the dust-containing air and rotate the direction of the swirl flow while centrifuging the dust and air. Since this dust is separated from the air using the inertial force, the air path loss in the first dust separation unit 61 is small. Moreover, the intake inlet 52, the separation air passage 62a, the opening 51 of the container case body 53, and the intake port 33A of the electric blower 33 are arranged at substantially the same height and sequentially arranged in the front-rear direction. When air is sucked from the separation air passage 62a through the filter F2 into the negative pressure chamber 56 of the container case body 53, the main flow of the air is large as shown by the arrow Q in FIG. It does not change, and flows substantially linearly at substantially the same height position, and is sucked into the electric blower 33.
[0048]
As a result, the air path loss is further reduced, and the function of the electric blower 33 can be fully exhibited. Furthermore, the connection pipe 44 of the lid body 40 and the cylindrical air passage formation body 62 are aligned in a straight line, so that the direction of air introduced toward the intake inlet 52 of the container case body 53 and the air passage formation. Since the extending direction of the body 62 is substantially in a straight line, the air path loss can be further reduced.
[0049]
As described above, the air in the negative pressure chamber 56 passes through the filter 80 and is sucked into the electric blower 33, so that fine dust that has passed through the filters F1 and F2 can be captured by the filter 80. The electric blower 33 can suck the cleaned air.
[0050]
In the above cleaning operation, the first dust separation part 61 that performs dust separation by inertia separation action is disposed on the upstream side of the filter 80 that separates dust by filtration, and the first dust separation part 61 removes coarse dust and the like. Separated in advance. As a result, it is possible to prevent large dust to be removed by the first dust separator 61 from adhering to the filter 80 and causing the filter 80 to be apparently clogged at an early stage due to the large dust. is there.
[0051]
In this case, the filter 80 for filtering fine dust or the like is arranged in the direction in which the negative pressure chamber portion 56 including the first dust separation portion 61 and the dust storage portion 55 arranged below the first pressure separation portion 61 are arranged in these arrangement directions. It extends and is arranged using not only the projection area of the first dust separator 61 but also the projection area of the dust reservoir 55. Therefore, the filter 80 can be enlarged without enlarging the size of the container case body 53 and by extension, the cleaner body 20 and without being restricted by the size of the dust reservoir 55 or the like.
[0052]
Thereby, since the filter 80 which makes a 2nd dust separation part filters dust with the large filter element 82 whole, while being able to suppress the air path loss in the filter 80 small, formation of a turbulent flow can also be suppressed. Therefore, the time when the filter element 82 is clogged and the air path loss becomes excessive is delayed. In other words, the maintenance interval required by the user, that is, the continuous usable period of the filter 80, such as washing the filter element 82 with water and regenerating it, or replacing it with a new filter 80, can be extended.
[0053]
Further, as the air passage loss can be reduced by increasing the size of the filter 80 as described above, the force for sucking dust-containing air into the suction port 43 of the cleaner body 20 is difficult to decrease. Thereby, the fall of the flow velocity of the air which passes along the separation air path 62a of the 1st dust separation part 61 is suppressed, and the inertial separation effect in the 1st dust separation part 61 falls early, in other words, the early cleaning performance. It is possible to suppress the decrease.
[0054]
Moreover, since the filter 80 is inclined, for example, a part of the main flow Q (see FIG. 2) sprayed on the upper portion (one end portion) of the filter element 82 can be reversed without reversing the flow direction of the main flow Q. It is possible to guide along the inclination of the filter element 82 to the lower part of the filter element 82, that is, the other end side of the filter 82 located downstream in the flow direction of the main flow Q.
[0055]
In this case, the filter element 82 has a pleat shape and is used in a posture in which the fold line extends in the vertical direction. Therefore, the front side of the filter element 82 (the side on which the dust receiving portion 55 and the negative pressure chamber portion 56 are provided). It is possible to easily spread the wind to the lower side of the filter element 82 by using as a guide a number of grooves (see reference numeral 82a in FIG. 6) that open to the top and extend in the vertical direction.
[0056]
As described above, a part of the main flow Q that tries to pass through one end side of the filter element 82 is smoothly guided to the other end side of the filter element 82 so that the wind can be easily distributed over the entire filter element 82. Therefore, the main flow Q is maintained. However, it is preferable in that fine dust or the like can be filtered using substantially the entire filter element 82.
[0057]
In addition, when the operation of the electric blower 33 is stopped, most of the dust adhering to the upstream surface of the filter 80 that is used while being tilted forward is used for the forward tilt of the filter 80. It can be easily dropped by its own weight. The dust thus dropped is collected in the lower end portion of the filter frame 81 and the gap G.
[0058]
The present invention is not limited to the one embodiment. For example, in the configuration using the pleated filter element 82, the upstream surface of the lower portion (one end portion) of the filter element 82 may be in contact with the standing wall 60. In this case, the gap G can be substantially secured by the grooves 82a. Furthermore, the filters F1 and F2 of the embodiment can be omitted, and the guide wall 55G that creates a swirling flow can be omitted in the dust storage portion 55. In addition, it is not obstructed to provide another dust reservoir portion having a reservoir structure and communicating with the gap G below the filter 80 forming the second dust separation portion. In this case, the other dust storage part is formed in the container case body 53 side by side with the lower end part of the dust storage part 55, and the lower end opening thereof is closed together with the lower end opening of the dust storage part 55 by the bottom plate 57, thereby forming a dead end structure. Is possible. In addition, in the present invention, the filter 80 forming the second dust separation portion is detachably supported by the main body case 30 of the above-described embodiment, and as the dust collecting container 50 is attached to the main body case 30, It is also possible to fit in the opening 51 of the container case body 53.
[0059]
【The invention's effect】
As described above, according to the present invention, the filter element that performs filtration and separation becomes large, and the air path loss is reduced in the second dust separation portion. Therefore, cleaning by inertia separation action in the first dust separation portion in the previous stage is performed. It is possible to provide a vacuum cleaner that can suppress a decrease in performance and improve the maintainability of the filter element.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a vacuum cleaner according to an embodiment of the present invention.
FIG. 2 is a side view showing a partial cross section of the vacuum cleaner main body of the electric vacuum cleaner of FIG.
3A is a side view showing the cleaner body of FIG. 2 with the lid open. FIG.
(B) is a perspective view which shows the cleaner main body of FIG. 2 in the state which opened the cover body and removed the dust collecting container.
4 is a longitudinal sectional view showing a state in which a filter is attached to a dust collecting container included in the electric vacuum cleaner of FIG. 1. FIG.
5 is a perspective view showing the dust collecting container of FIG. 4 and a filter attached to the container as viewed from the rear side.
6 is a cross-sectional plan view showing a state in which a filter is attached to the dust collecting container of FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Electric vacuum cleaner 20 ... Vacuum cleaner main body 33 ... Electric blower 33A ... Intake port 43 ... Suction port 50 ... Dust collection container (dust cup)
50 ... Opening of dust collecting container 55 ... Dust reservoir 56 ... Negative pressure chamber (negative pressure space)
57 ... Bottom plate
58 ... ceiling wall
59… Ventilation opening
F1 ... Filter 60 ... Standing wall 61 ... First dust separation part 62 ... Air passage formation body 62a ... Separation air passage 63 ... Guide part 63B ... Air blow wall part 64 ... Separation opening 80 ... Filter (second dust separation part)
81 ... Filter frame 82 ... Filter element G ... Gap

Claims (3)

A negative pressure chamber having a first dust separating portion for separating air and dust flowing through the air passage by inertia separation in an air passage extending from the suction port of the cleaner body to the air intake of the electric blower; , A dust storage part that is arranged in parallel in the vertical or horizontal direction or oblique direction of the vacuum cleaner main body with respect to the negative pressure chamber part and stores the dust separated by the first dust separation part, and the dust storage part and the The first pressure chamber includes a wall that partitions the negative pressure chamber and has a connection hole and is covered with a filter and has a vent opening that communicates the negative pressure chamber and the dust reservoir, and a mat-like filter element. A second dust separation unit disposed on the downstream side of the dust separation unit to separate the dust that has passed through the first dust separation unit, and the second dust separation unit includes the first dust separation unit and the second dust separation unit. It extends in the direction of alignment with the dust reservoir, and the projection area behind the dust reservoir is small. Is disposed over a part and in the projection area to the rear of the first dust separator, and passes through the first dust separator and toward the rear of the cleaner body without passing through the dust reservoir. A flowing air current and an air current sucked into the negative pressure chamber portion from the ventilation opening through the dust hole through the connection hole are passed through the filter element from the front side, and fine dust is caused by the filter element. A vacuum cleaner characterized by capturing.   The electric vacuum cleaner according to claim 1, wherein the second dust separator is used with the filter element inclined.   The vacuum cleaner according to claim 1 or 2, wherein the filter element is pleated and the filter element is used so that a fold line extends in a vertical direction.

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