JP2010273819A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner which is low-cost and whose filters exhibit high maintainability. <P>SOLUTION: The vacuum cleaner is provided with an electric blower (not shown in the figure) and a dust separator 23 which is arranged upstream of the electric blower, has pleated filters 27 in a part and separates dust from air sucked by the electric blower. At least one dust attachment preventing rib 44 which prevents dust from attaching to the filters 27 is arranged between ridges of pleats on the side of a dust attaching surface of the filters 27. Since a turbulent flow is generated downstream of the dust attachment preventing rib 44 when suction air transfers the dust from the dust separator 23 toward the filters 27 and flows near the dust attachment preventing rib 44, the dust continues to float between the filters 27 and hardly attaches to the filters 27. Also, since only the dust attachment preventing rib 44 is arranged, only a small number of parts are required for a dust removal construction. In this manner, the vacuum cleaner can be provided at a low cost and its filters 27 exhibit high maintainability. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner using a dust collection case that can be used repeatedly.

  2. Description of the Related Art Conventionally, as this type of vacuum cleaner, there is known a vacuum cleaner provided with a dust removing means that applies vibration by flipping the back surface of a pleated filter and removes dust collected by the pleated filter (see, for example, Patent Document 1). ).

JP 2008-113786 A

  However, in the configuration of the conventional vacuum cleaner, since the back surface of the pleated filter is flipped, the dust removal efficiency is lower than that of removing dust on the surface where dust is actually attached, and a slider for configuring dust removal means There is a problem that the number of parts such as the pinion and the pinion increases and the configuration becomes complicated and expensive.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an electric vacuum cleaner having an inexpensive configuration and improved maintainability of a filter.

  In order to solve the above-mentioned conventional problems, the vacuum cleaner of the present invention is installed on the upstream side of the electric blower and the electric blower, and has a pleated filter in part and sucked by the electric blower. A dust separation part for separating dust from the air, and at least one dust adhesion preventing rib for preventing dust from adhering to the filtration filter between the pleat peaks on the dust adhesion surface side of the filtration filter; When dust flows from the dust separation part to the filtration filter side and flows near the dust adhesion prevention rib, turbulence occurs on the downstream side of the dust adhesion prevention rib. It keeps floating in the filter, making it difficult to adhere to the filtration filter, and only providing dust adhesion prevention ribs between the filtration filters, so the number of parts of the dust removal configuration can be reduced, Value in, you are possible to provide an excellent vacuum cleaner to the maintenance of the filtration filter.

  The vacuum cleaner according to the present invention is inexpensive and excellent in maintainability of the filtration filter.

Overall view showing a schematic configuration of the electric vacuum cleaner according to Embodiment 1 of the present invention. Sectional view of the vacuum cleaner body of the vacuum cleaner (A) Longitudinal sectional view showing the structure of the opening / closing lid of the dust collecting case of the electric vacuum cleaner, (b) Longitudinal sectional view of the dust collecting case, (c) AA sectional view of (b), (d) BB sectional view of (b) (A) CC sectional view of FIG. 3 (b), (b) DD sectional view of FIG. 3 (b). Sectional drawing which shows the structure of the 1st filtration filter of the same vacuum cleaner The principal part expanded sectional view of the 2nd filtration filter of the vacuum cleaner (A) Flat sectional view showing the airflow near the suction port in the dust collecting case of the electric vacuum cleaner, (b) Flat sectional view showing the flow of the airflow near the filtration filter in the dust collecting case, (c) Dust collecting The longitudinal cross-sectional view which shows the flow of the vertical airflow in a case, (d) The principal part expanded sectional view of the 2nd filtration filter of the same vacuum cleaner (A) EE sectional view of FIG. 7 (c), (b) FF sectional view of FIG. 7 (c).

  The first invention includes an electric blower and a dust separation unit that is installed on the upstream side of the electric blower, has a pleated filter in part and separates dust from the air sucked by the electric blower, At least one dust adhesion prevention rib for preventing dust from adhering to the filtration filter is provided between the pleat crests on the dust adhesion surface side of the filtration filter, and the suction air separates the dust into dust. When it is transferred from the head to the filtration filter side and flows in the vicinity of the dust adhesion prevention rib, turbulence occurs on the downstream side of the dust adhesion prevention rib, so that the dust continues to float between the filtration filters and does not adhere to the filtration filter. In addition, since only dust-prevention ribs are provided between the filtration filters, the number of parts in the dust removal configuration can be reduced, and the cost is low. It is possible to provide an electric vacuum cleaner.

  In the second invention, in particular, the dust adhesion preventing rib of the first invention is formed in a substantially circular cross section, and turbulence can be generated on the downstream side of the dust adhesion preventing rib while reducing passage pressure loss. An electric vacuum cleaner with low pressure loss and excellent filter filter maintenance can be provided.

  In the third invention, in particular, the dust adhesion preventing rib of the first or second invention is provided in the vicinity of the inlet with respect to the air flow direction of the pleat. Therefore, it is possible to provide a vacuum cleaner that suppresses the adhesion of dust in a wider range and is excellent in maintainability of the filter.

  In the fourth invention, in particular, the dust adhesion preventing rib according to any one of the first to third inventions is provided at substantially the center between the pleat ridges, and turbulent flow is generated evenly on both sides of the pleats. It is possible to provide a vacuum cleaner that suppresses the adhesion of dust in a wider range and is excellent in the maintainability of the filtration filter.

  According to a fifth aspect of the invention, in particular, when the dust adhesion preventing rib vibrates due to the turbulent air flow according to any one of the first to fourth inventions, the dust adhesion preventing rib contacts the filtration filter. Because of the turbulent flow downstream of the dust adhesion prevention rib, the dust adhesion prevention rib vibrates and directly vibrates the filtration filter, making it difficult for dust to adhere to the filtration filter, which makes the filtration filter more maintainable. An excellent vacuum cleaner can be provided.

  In the sixth invention, in particular, one end of the dust adhesion preventing rib according to any one of the first to fifth inventions is held in a cantilever manner, and the vibration of the other end where the dust adhesion preventing rib is not held is supported. Since the amplitude is increased, it is possible to provide a vacuum cleaner that is excellent in maintainability of the filter because the filter is subjected to a large vibration and dust is less likely to adhere to the filter.

  In the seventh invention, in particular, the dust adhesion preventing rib according to any one of the first to sixth inventions is formed in a wire shape. Since the dust adhesion preventing rib has elasticity and the amplitude of vibration is increased, the filtration filter Therefore, it is possible to provide an electric vacuum cleaner that provides greater vibration and makes it difficult for dust to adhere to the filter, and is excellent in maintainability of the filter.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
The vacuum cleaner in Embodiment 1 of this invention is demonstrated using FIGS. FIG. 1 is an overall view showing a schematic configuration of a vacuum cleaner in the present embodiment, and FIG. 2 is a cross-sectional view of a vacuum cleaner body of the vacuum cleaner.

  1 and 2, the electric vacuum cleaner in the present embodiment has an electric blower 21 that generates a suction airflow, a rotatable caster 4 in front of the bottom surface, and rotatable wheels 3 on both rear side surfaces. A vacuum cleaner body 1 that can be freely moved on the floor, a dust collecting case 5 that is detachably attached to the front of the vacuum cleaner body 1, and one end connected to a suction port 6 provided in the vacuum cleaner body 1 The hose 7 is connected to the other end of the extension tube 8, and the suction tool 9 is connected to the end of the extension tube 8 on the side opposite to the hose 7.

  The dust collection case 5 is located on the upstream side of the electric blower 21 and separates dust contained in the air sucked by the electric blower 21 through a partition wall 26 having a vent (not shown). It is. The dust collecting case 5 has a substantially cylindrical shape and has a three-stage configuration in the vertical direction. The dust collecting case 5 includes a case upper portion 22a, a case central portion 22b, and a dust storage portion 24 in order from the upper step. Is the dust separator 23.

  As shown in FIG. 2, the case upper portion 22a is provided with a swirl airflow inlet 10 through which air containing dust is introduced from the tangential direction. And the dust collection case 5 is provided with the 1st ventilation path 11 so that it may connect from the suction port 6 provided in the lower part of the cleaner body 1 to the swirl airflow introduction port 10, and this 1st ventilation path 11 is provided with a bent portion 12 having a large R portion that rises in a substantially vertical direction while reducing loss of the suction airflow from the suction port 6 to the upper swirl airflow introduction port 10.

  By providing the bent portion 12, air can be smoothly conveyed from below to above, and pressure loss at the time of collision can be reduced. Further, the bent portion 12 can substantially reduce the ventilation path of the first ventilation path 11. By configuring vertically, the suction port 6 to the swirling air flow introduction port 10 can be configured with the shortest distance, the pressure loss in the first ventilation path 11 can be reduced, the suction force is greater, The dust collecting case 5 is a small vacuum cleaner.

  Further, in the first embodiment, the bent portion 12 having the large R portion which is the first ventilation path 11 is formed integrally with the dust accommodating portion 24, and the bent portion 12 and the dust accommodating portion 24 are formed. Since the same part can be used, the bent part 12 and the dust container part 24 do not form a double wall, and the cross-sectional area of the first ventilation path 11 is secured to the maximum to reduce the pressure loss. It is a vacuum cleaner with low cost, light weight and excellent assembly.

  The dust collection case 5 is communicated from the swirl airflow inlet 10 to the dust container 24 for depositing the lowest level dust, and the air path from the swirl airflow inlet 10 to the electric blower 21 is the dust of the dust collection case 5. The opening 25 provided in the separation part 23 is formed in communication with the partition wall 26 of the cleaner body 1. Furthermore, a cylindrical filtration filter 27 is installed in the dust separator 23.

  In the first embodiment, the cylindrical filtration filter 27 is provided on the upstream side with a cylindrical first filtration filter 27a composed of a coarse dust filter, and on the outer periphery on the downstream side of the first filtration filter 27a. It has a two-layer structure with a cylindrical second filtration filter 27b made of a fine dust filter.

  The first filtration filter 27a and the second filtration filter 27b are a main air passage 29a and a second air passage, which are first air passages where the swirling air flow inlet 10 of the dust collecting case 5 and the electric blower 21 communicate with each other. It arrange | positions in the middle of the subwind path 29b which is a path.

  The main air passage 29a from the swirl airflow inlet 10 to the electric blower 21 is provided over the entire space from the first filtration filter 27a to the outer periphery of the second filtration filter 27b.

  Further, the first ventilation path 11 is configured to pass through a part of the second filtration filter 27b provided in the dust collection case 5, and the second filtration filter 27b includes: The ventilation path which becomes a part of the path of the first ventilation path 11 is provided in an airtight manner independently of the ventilation path of the second filtration filter 27b.

  Next, according to FIGS. 3 (a), 3 (b), 3 (c), 3 (d), 4 (a), and 4 (b), the dust collecting case 5 and the cylindrical filter are used. 27 will be described in detail.

  As shown in FIG. 3 (a), the dust collecting case 5 is substantially cylindrical and has a three-stage configuration in the vertical direction. The dust collecting case 5 is composed of a case upper part 22a, a case center part 22b, and a dust container 24 in order from the upper part. The case upper part 22a and the case center part 22b are used as the dust separation part 23.

  As shown in FIG. 3 (c), the swirl airflow inlet 10 is provided with a wind direction guide 34 so as to contact the cylindrical inner surface 13 so that the airflow flows from the tangential direction of the cylindrical inner surface 13 which is a cross section of the case upper portion 22a. And it arrange | positions in the position eccentrically located below rather than the line which connects the center of the 1st ventilation path 11, and the circumference center of case upper part 22a.

  In order to generate a swirling airflow, a swirling air circulation air passage is formed in a substantially cylindrical shape, preferably a cylindrical shape, and an airflow swirling along the circumferential direction is generated on the inner wall surface of the swirling air circulation air passage. Thus, the swirl airflow inlet 10 is formed. That is, the suction direction of the swirl airflow inlet 10 is a cylindrical tangential direction in a direction orthogonal to the cylindrical axial direction so as to flow along the circumferential direction of the inner wall surface.

  With such a configuration, the swirling air flow is formed in the passage that forms the swirling airflow generated along the inner surface of the case upper portion 22a in the dust separation portion 23 and the swirling airflow generated in the cylindrical hollow portion in the first filtration filter 27a. It is a wind path.

  Further, in order to generate a swirling airflow in the swirling air circulation air passage, it is needless to say that the suction force of the electric blower 21 acts in the swirling air circulation air passage so as to be in a negative pressure state. Therefore, a filtration filter in which the ceiling side of the substantially cylindrical swirling air circulation passage is covered with the top of the dust collecting case 5 and the other end is hermetically connected to the dust container 24 and is disposed at least in the swirling air circulation air passage. The suction force of the electric blower 21 may be applied from the 27 portion.

  Further, the ventilation portion of the filtration filter 27 is configured closer to the dust container portion 24 than the swirl air flow inlet 10 so that the generated swirl air current is generated in the direction of the dust container portion 24. The arrangement of the swirl airflow inlet 10 provided in 22 a is arranged such that the lower end of the swirl airflow inlet 10 is located above the upper end of the opening 25 provided in the dust separator 23.

  In this way, by making the arrangement position of the swirl airflow inlet 10 higher than the opening 25, the air introduced from the swirl airflow inlet 10 from the tangential direction of the cylindrical inner surface 13 of the case upper portion 22a is on the opening 25 side. It is generated as a swirling airflow in the direction of the dust container 24, which is the downward direction, by the suction force action. Due to the swirling airflow that continues to descend while turning, the coarse dust 52 such as cotton dust receives the wind pressure and turns down to be guided to the dust container 24.

  Further, the cylindrical inner surface 13 of the case upper portion 22 a of the dust collecting case 5 forms one surface as a whole with the inner surface of the inner first filtration filter 27 a constituting the cylindrical filtration filter 27. That is, there is no protrusion protruding on the inner surface of the dust collecting case 5.

  In the first embodiment, the dust collecting case 5 is a substantially cylindrical shape, but the cylindrical shape is not limited to a perfect circle, and may be an elliptical shape, a polygonal shape such as an octagonal shape or a decagonal shape. It is sufficient that the airflow flowing in from the direction has a shape in which a swirling airflow is generated along the inner surface of the dust collecting case 5.

  Similarly, in the cylindrical filtration filter 27, the cylinder is not limited to a perfect circle, but may be an elliptical shape, a polygonal shape such as an octagonal shape or a decagonal shape, and the swirl generated along the inner surface of the dust collecting case 5. Any shape can be used as long as the airflow can be generated in the hollow cylindrical portion in the first filtration filter 27a. Further, as long as the swirl airflow inlet 10 is not eccentric as described above and is located in the center, any configuration may be used as long as the swirl airflow is generated in the guide path or the guide.

  Further, as shown in FIGS. 3A, 3B, and 7C, the dust container 24 disposed at the lower part of the dust collecting case 5 includes a dust container upper surface 36, and the dust container upper surface. 36 is provided with a substantially cylindrical dust accommodating portion inner wall 38 protruding from 36, and in the space inside the dust accommodating portion inner wall 38, coarse dust 52 is mainly accumulated among the sucked dust. The fine dust 51 that has passed through the first filtration filter 27a in the sucked dust is accumulated in the space outside the inner wall 38 of the dust container.

  Furthermore, an opening / closing lid 31 is provided on the bottom surface of the dust collection case 5 on the dust container 24 side. The inner bottom surface of the opening / closing lid 31 serves as a dust accommodating portion lower surface 39, and the dust in the dust accommodating portion 24 can be discharged by opening the opening / closing lid 31 via the hinge 32.

  Further, as shown in FIG. 4A, a linear portion 40 having a substantially tangential shape of the circular arc is formed in a part of the arc-shaped dust accommodating portion inner wall 38, and the straight line 40 is formed on the dust accommodating portion lower surface 39. A dust reservoir 37 is formed that is surrounded by the outer wall of the first ventilation path 11 and the side wall of the dust container 24, which are disposed so as to protrude inside the part 40 and the dust container 24.

  The arrangement of the dust reservoir portion 37 is a range in which the swirling airflow 50 swirling along the arc of the dust accommodating portion inner wall 38 flows along the straight portion 40 and is hardly affected by the flow of the swirling airflow 50. (In a broken line range in FIG. 4), the dust reservoir 37 is provided opposite to the direction of the swirling airflow 50, and the straight portion 40 tangent to the arc-shaped dust container inner wall 38 is a dust reservoir. Since it is provided on the upstream side of the portion 37, the dust carried by the swirling airflow 50 is arranged so as to efficiently accumulate in the dust reservoir portion 37.

  Further, a dust trapping rib 46 having a substantially trapezoidal shape with a wider side of the dust container lower surface 39 is formed on the dust container lower surface 39 which is the inner bottom surface of the opening / closing lid 31, and a cylindrical hollow in the first filter 27a. One portion is provided so as to be located near the center of the projected portion.

  The dust rising prevention rib 46 is provided such that the upper end of the dust rising prevention rib 46 is provided at a substantially intermediate position between the dust accommodating portion upper surface 36 and the dust accommodating portion lower surface 39, and the dust rising prevention. A gap A41a between one end of each of the both ends on the base side of the rib 46 and the outer wall of the first ventilation path 11, and a gap B41b between the other end and the dust accommodating part inner wall 38 become a substantially equidistant gap space. Is provided. Further, the gap A41a and the gap B41b have a dust trapping prevention rib 46 having a substantially trapezoidal shape, so that the vicinity of the upper surface 36 of the dust container is wider than the vicinity of the lower surface 39 of the dust container.

The dust collecting case 5 is made of acrylic resin in the first embodiment. However, if at least a part of the dust collecting case 5 is made of a see-through member, the amount of dust inside can be visually observed from above. This is preferable because it can be easily confirmed. As the transparent member, ABS, polypropylene, acrylic resin and the like can be easily obtained as a member and are preferable in terms of good workability.

  Further, as shown in FIGS. 3A to 3D, the dust collection case 5 is located inside the cylindrical dust collection case 5 in a range between the swirl airflow inlet 10 and the dust container 24. A second ventilation path 33 is formed over the entire outer circumference between the cylindrical filtration filter 27 and the cylindrical filtration filter 27, and the inside of the dust collecting case 5 and the suction port (not shown) of the electric blower 21 are provided in the second ventilation path. It communicates via the path 33. The first ventilation path 11 and the second ventilation path 33 are configured to be included in the dust collection case 5.

  As shown in FIG. 3D, the cylindrical filtration filter 27 has a cylindrical shape so as to surround the inside of the cylindrical dust collecting case 5. The first filtration filter 27a composed of a coarse dust filter located upstream of the suction airflow removes relatively large dust such as cotton dust and hair from the dust in the suction airflow. The second filtration filter 27b composed of a fine dust filter located in the position removes dust such as fine dust particles such as sand dust, pollen and mite feces from the air stream.

  Thus, by providing a plurality of layers of cylindrical filtration filters 27 according to the size of dust to be removed, the frequency of clogging of the filtration filters can be reduced and the air flow sustaining performance can be extended. It does not matter.

  As the first filtration filter 27a, it is preferable to use a member having a relatively large hole diameter through which fine dust such as sand dust can pass, such as a metal mesh, a punching metal, and a resin mesh. A metal mesh provided with a through hole 28 having a minute opening of 100 to 300 microns is used.

  On the other hand, as the second filtration filter 27b, a nonwoven fabric, pulp, glass fiber, HEPA filter, or the like can be used, but a shape member that is formed by pleating and folding a nonwoven fabric member that can efficiently remove relatively fine particles is used. By connecting and installing in a cylindrical shape, dust removal performance can be ensured while reducing ventilation resistance.

  Further, it is more preferable to use a filter coated with a PTFE porous member on the dust adhering surface because dust separation is improved, and clogging of the second filtration filter 27b can be suppressed.

  FIG. 5 is a cross-sectional view showing a cross-sectional structure of the cylindrical first filtration filter 27a in FIG. 3 (d). As shown in FIG. 5, the cylindrical first filtration filter 27a has an inner circumference. When the surface is the upstream filter surface 61 and the outer peripheral surface is the downstream filter surface 62, the inner peripheral side of the first filtration filter 27a is located in the space above the dust container 24, and the space The swirling airflow 50 is swirling along the upstream filter surface 61.

  And the outer peripheral side of the 1st filtration filter 27a becomes the ventilation path of the air which passed the 1st filtration filter 27a, the 2nd filtration filter 27b is arrange | positioned in the ventilation path, and the electric blower 21 is the downstream. Be placed.

  Further, the first filtration filter 27a is formed with a plurality of inclined through holes 28 penetrating from the upstream filter surface 61 to the downstream filter surface 62 so as to be distributed over almost the entire area of the filter surface.

  In addition, when a metal plate is used as the base material of the first filtration filter 27a, it is possible to suppress dust from adhering to the first filtration filter 27a due to static electricity, particularly adhesion of fine dust. 28 is less likely to be clogged. Further, the base material of the metal plate is excellent in workability such as punching and etching, and the internal shape of the through hole 28 is smoothly formed, so that the effect of reducing the entanglement of dust can be obtained.

  Furthermore, when the plate-like filter is formed into a cylindrical shape, molding is easy, and the first filtration filter 27a can be molded at a low cost. Even if a resin plate containing an antistatic agent such as an antistatic agent, carbon black, or metal fine powder is used as the base material of the first filtration filter 27a, the same effect as that obtained when a metal plate is used. Is obtained.

  FIG. 6 is an enlarged cross-sectional view of a main part of the second filtration filter 27b shown in FIG.

  In the first embodiment, as shown in FIGS. 3D and 6, the second filtration filter 27b has a through-hole diameter on the upstream side of the sheet-shaped filter medium that is made rigid with PET resin. A filter to which a PTFE film of about 0.5 microns is attached is pleated to form a fold-shaped filter 41, and both ends are connected to form a cylinder.

  Further, a wire-shaped dust adhesion prevention rib 44 having a substantially circular cross section in the vicinity of the inlet with respect to the ventilation direction is held at the upper end in a cantilever manner at the approximate center of the pleats of the second filtration filter 27b. Is provided.

  In addition, in the outer peripheral portion of the second filtration filter 27b made of the fold-folded filter 41, the indented portion 42 on the inner surface of the fold-shaped member, which is the upstream side of the suction airflow, is substantially U-shaped and R = 2 to 5 mm. It is rounded. Note that the folds of the second filtration filter 27b on the side close to the first filtration filter 27a are not particularly provided with a recessed portion.

  In addition, the outside of the fold-folded filter 41 that is the second filtration filter 27b is provided with a seal portion 43 that is sealed with a resin, a sealant, or the like only within a range of several millimeters at the upper and lower ends. Air permeability is blocked.

  About the vacuum cleaner of this Embodiment 1 comprised as mentioned above, FIG.7 (a), FIG.7 (b), FIG.7 (c), FIG.7 (d), FIG.8 (a), FIG.8 The operation will be described with reference to (b).

  When the operation of the electric blower 21 is started, a suction airflow is generated, and dust from the floor surface is sucked into the dust collecting case 5 through the suction tool 9, the extension pipe 8, and the hose 7. The dust sucked into the dust collecting case 5 reaches the swirling air flow inlet 10 through the suction port 6, the bent portion 12, and the first ventilation path 11.

  At this time, the swirl airflow inlet 10 of the dust collection case 5 is eccentrically installed so that the airflow flows in a tangential direction with respect to the cylindrical cross section of the case upper portion 22a as described above. 7 (c), the airflow that has flowed in from the swirling airflow inlet 10 changes to a swirling airflow 50 at the case upper portion 22 a of the dust collecting case 5.

  Here, since the lower end of the swirl airflow inlet 10 is disposed above the upper end of the opening 25, the airflow flowing from the swirl airflow inlet 10 has a swirl component and also has a downward component. It will be. Therefore, the swirling airflow generated in the case upper portion 22a of the dust collecting case 5 continues to descend while swirling and reaches the vicinity of the cylindrical filter 27.

  Here, the first filtration filter 27a on the upstream side of the cylindrical filtration filter 27 does not stop the flow of the swirling airflow 50 because there is no protrusion toward the inside of the dust collecting case 5, and the airflow swirls. 7B, the first filtration filter 27a and the second filtration filter 27b are sequentially passed through the second ventilation path 33 and sucked by the electric blower 21 as shown in FIG.

  Here, the dust sucked together with the sucked air flow is guided to the cylindrical filter 27 while turning along with the air flow, and the fine dust 51 such as sand dust among the dust is the first filter 27a. Since the turbulent turbulent flow 45 is generated when it flows through the dust adhesion preventing rib 44 after passing through the dust, the dust continues to float between the second filtration filters 27b and hardly adheres to the second filtration filter 27b. In this embodiment, since the dust adhesion preventing ribs 44 are only provided between the second filtration filters 27b, the number of parts of the dust removal configuration is reduced, and the electric vacuum cleaner with improved filter filter maintenance is provided. can do.

  Further, since the dust adhesion preventing rib 44 has a substantially circular cross section, the turbulent flow 45 can be generated on the downstream side of the dust adhesion preventing rib 44 while reducing the passage pressure loss.

  Further, the dust adhesion preventing rib 44 is provided in the vicinity of the inlet with respect to the air flow direction of the pleat, so that a turbulent flow 45 is generated over the entire surface of the second filtration filter 27b from the inlet to the inner side of the pleat, so that the dust is more widely spread. Can be suppressed.

  Further, by providing the dust adhesion preventing ribs 44 substantially at the center between the pleat peaks, the turbulent flow 45 can be generated evenly on both sides of the pleats, and the dust adhesion can be suppressed over a wider range.

  Further, the dust adhesion prevention rib 44 vibrates when the turbulent flow 45 is generated and contacts the second filtration filter 27b to directly transmit the vibration, thereby making it more difficult for dust to adhere to the second filtration filter 27b. it can.

  Further, since the upper end of the dust adhesion preventing rib 44 is held in a cantilever manner, the amplitude of vibration at the other end where the dust adhesion preventing rib 44 is not held increases, and the second filtration filter 27b causes a large vibration. It is difficult for dust to adhere to the second filtration filter 27b.

  In the first embodiment, the upper end of the dust adhesion preventing rib 44 is held in a cantilever manner. However, even if the upper end of the dust adhesion preventing rib 44 is held at the lower end, the amplitude of vibration increases and the second filtration filter 27b gives a large vibration. The same dust adhesion preventing effect can be obtained. Further, when both ends are held, the vibration amplitude is reduced and the dust adhesion preventing effect due to the vibration is reduced, but the dust adhesion preventing effect due to the spiral turbulent flow 45 can be obtained.

  Further, since the dust adhesion preventing rib 44 is formed in a wire shape, the dust adhesion preventing rib 44 has elasticity and the amplitude of vibration is increased, so that the second filtration filter 27b gives a large vibration and the second filtration filter 27b. Dust is less likely to adhere to the surface.

  In the first embodiment, a cylindrical filtration filter is used. However, if a flat filtration filter is subjected to pleating, a dust adhesion preventing rib 44 can be similarly disposed to obtain an adhesion preventing effect. Can do.

  Further, the coarse dust 52 such as cotton dust or thread-like dust that is light in specific gravity and easily receives wind pressure is easily peeled off from the surface of the first filtration filter 27a by the swirling airflow 50, and is shown in FIGS. As shown in c), the turning is continued in the cylindrical hollow portion of the first filtration filter 27a.

  This action causes a self-cleaning action by the airflow to act on the first filtration filter 27a, so that the suction force is prevented from being reduced without being clogged. When the amount of dust to be sucked further increases, the coarse dust 52 descends while turning in the first filtration filter 27a and is guided to the dust container 24.

  As shown in FIG. 8A, which is an EE cross section of FIG. 7C, the dust guided to the dust container 24 is a gap between the dust rising prevention rib 46 and the outer wall of the first ventilation path 11. It swirls through a gap B41b between A41a and the dust containing portion inner wall 38, and the straight portion 40 turns the swirl flow into a straight flow and is guided to and stored in the dust reservoir 37. After that, the dust is sequentially stored in the dust container 24 using the dust reservoir 37 as a starting point.

  That is, by providing the straight portion 40 on the inner wall 38 of the dust accommodating portion, even if the dust carried by the swirling airflow 50 accumulates in the dust reservoir 37, the straight portion 40 is present, so that it is difficult for the dust to swirl, and the dust is accommodated. The dust accommodated in the part 24 rises to the dust separation part 23 and is prevented from reattaching to the first filtration filter 27a.

  Furthermore, an important role of the dust reservoir 37 is that dust introduced into the dust accommodating portion 24 on the swirling airflow 50 is first separated from the swirling airflow 50 as a starting point for accommodation. As a proof to prove this, according to an experiment in the case where the dust reservoir 37 is not provided in the dust container 24, the dust introduced into the dust container 24 cannot be separated from the swirling airflow 50, and the dust container This causes a phenomenon in which the dust that has been stored eventually rises again to the dust separation unit 23 without continuing to rotate in the unit 24 and staying in the dust storage unit 24.

  However, the dust accommodated in the dust accommodating portion 24 tries to rise again to the dust separating portion 23 by the swirling airflow 50 as the amount of accommodation increases, and this rise is further prevented by the dust rise preventing rib 46. .

  Next, the function and effect of the dust rising prevention rib 46 will be described below.

  The dust rising prevention rib 46 includes a gap A41a between one end of each end portion on the base side of the dust rising prevention rib 46 and the outer wall of the first ventilation path 11, and a gap B41b between the other end and the dust containing portion inner wall 38. Are provided so as to form a substantially equidistant gap space, a fixed amount of swirling airflow 50 flows through the gap A41a and the gap B41b, and dust is easily guided to the dust container 24.

  Furthermore, since the dust rising prevention rib 46 has a substantially trapezoidal shape, the gap A41a and the gap B41b are wide in the vicinity of the upper surface 36 of the dust container so that a swirling airflow can easily enter. Conversely, in the vicinity of the lower surface 39 of the dust container, the gap A41a and the gap B41b are small, and the flow velocity of the swirling airflow 50 is reduced.

  In addition, as a function that the upper end of the dust rising prevention rib 46 is provided at a substantially intermediate position between the upper surface 36 of the dust container and the lower surface 39 of the dust container, a range in the height direction of the container in the dust container 24 is provided. In this case, in the range of about half the height from the lower surface 39 of the dust container, while the flow velocity of the swirling airflow 50 is reduced, the dust separation portion 23 is prevented from rising, and the dust rising prevention rib 46 is an obstacle. Thus, it is arranged at an appropriate height so as not to prevent the dust from being guided to the dust container 24.

With the above-described configuration, after the dust is carried to the dust container 24 without any obstacle by the swirling airflow 50 generated in the dust separator 23, the dust storage part 37 in the dust container 24 is stored. As a result, the dust is sequentially stored in the entire dust storage portion 24, and the stored dust rises again to the dust separation portion 23 and is prevented from reattaching to the first filtration filter 27a, thereby reducing the air volume. Therefore, it is possible to provide a vacuum cleaner excellent in air volume maintenance performance.

  Further, since the dust rising prevention rib 46 is disposed so as to be substantially parallel to the straight portion 40 of the dust containing portion inner wall 38, the dust rising preventing rib 46 and the dust containing portion inner wall 38 including the straight portion 40 face each other. When the dust is sequentially accumulated in the dust container 24 starting from the dust storage part 37 as a starting point, the dust can be smoothly accumulated without being caught, and the entire inside of the dust container 24 can be formed. In addition, it can be uniformly deposited without any problem.

  Further, since the flow velocity of the swirling airflow is reduced near the end portion of the dust rising prevention rib 46, it is possible to easily collect dust in the dust reservoir portion 37 by providing the dust reservoir portion 37 in the vicinity thereof.

  In addition, by forming the dust reservoir 37 using the outer wall of the first ventilation path 11, the first ventilation path 11 can be efficiently accommodated in the dust collecting case 5, and can be used more compactly. It is possible to provide a vacuum cleaner that is easy to maintain air volume and has excellent performance.

  In the first embodiment, one dust rise prevention rib 46 is provided. However, even if a plurality of dust rise prevention ribs 46 are provided, the dust rise prevention effect can be obtained similarly by optimizing the appropriate shape and arrangement. is there.

  In the first embodiment, the gap A41a and the gap B41b between the both end portions of the dust rising prevention rib 46, the outer wall of the first ventilation path 11, and the dust accommodating portion inner wall 38 are set to be substantially equidistant from each other. However, when the first ventilation path 11 does not exist in the dust accommodating part 24, the clearance between the dust accommodating part inner wall 38 existing at the position corresponding to the first ventilation path 11 is set to be substantially equidistant. The same effect can be obtained.

  As described above, since the vacuum cleaner according to the present invention can provide a vacuum cleaner with improved maintenance performance of the filter at low cost, the maintenance work such as cleaning of the dust removal filter and discharging of dust is greatly increased. It can be reduced and can be used not only for household vacuum cleaners but also for various types of vacuum cleaners such as commercial vacuum cleaners.

1 Vacuum cleaner body
21 Electric blower 23 Dust separator
27 Filtration filter 27a First filtration filter 27b Second filtration filter 44 Dust adhesion prevention rib 45 Turbulence

Claims (7)

An electric blower and a dust separation part that is installed on the upstream side of the electric blower, has a pleated filter in part and separates dust from the air sucked by the electric blower, and is attached to the filter An electric vacuum cleaner provided with at least one dust adhesion preventing rib for preventing dust from adhering to the filtration filter between ridges on the surface side. The vacuum cleaner according to claim 1, wherein the dust adhesion preventing rib has a substantially circular cross section. The electric vacuum cleaner according to claim 1 or 2, wherein a dust adhesion preventing rib is provided in the vicinity of the entrance with respect to a ventilation direction of the pleats. The vacuum cleaner according to any one of claims 1 to 3, wherein a dust adhesion preventing rib is provided at substantially the center between the pleat peaks. The vacuum cleaner according to any one of claims 1 to 4, wherein when the dust adhesion preventing rib vibrates due to air turbulence, the dust adhesion preventing rib contacts the filtration filter. The vacuum cleaner according to any one of claims 1 to 5, wherein one end of the dust adhesion preventing rib is held in a cantilever manner. The vacuum cleaner according to any one of claims 1 to 6, wherein the dust adhesion preventing rib is formed in a wire shape.