JP2010022615A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner which can prevent threadlike dust from sticking into and clinging to the through-holes of a filter and can easily discharge the dust collected after cleaning work. <P>SOLUTION: The vacuum cleaner has an electric blower 21 emitting suction wind, a dust separation section 23 introducing sucked dust-containing air, a dust storage section 24 storing the dust separated by the dust separation section 23, and a swirling air current ventilation path introducing air into the dust separation section 23 as a swirling air current. A dust entrance prevention guide adapted to the path of the swirling air current is formed in the through-holes of a first filter 27a provided in the dust separation section 23. Consequently, the vacuum cleaner can restrain the threadlike dust from sticking into and clinging to or blocking the through-holes by blocking the entrance of the threadlike dust. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner having a filtration filter for separating dust.

  2. Description of the Related Art In recent years, a so-called cyclone type vacuum cleaner that attracts attention is a type of vacuum cleaner that imparts a swirling component to the airflow of suction air and separates and removes dust from the airflow by centrifugal force. This type of vacuum cleaner is configured to generate a swirling airflow in the dust collecting case, separate the dust from the sucked air flow by the centrifugal force of the swirling airflow, and deposit the separated dust in the dust collecting case. Adopted.

Recently, for the purpose of preventing clogging of the filtration filter and the resulting reduction in dust collection performance of the vacuum cleaner, a through hole shape of the filtration filter has been proposed (for example, see Patent Document 1).
JP 2006-175423 A

  In the case of a through hole of a general filtration filter that penetrates in a direction perpendicular to the filter surface as in Patent Document 1, a front end surface and a rear end surface that are perpendicular to the flow direction of the swirling airflow in the cyclone cylinder are Will have. In this configuration, stagnant vortex flow is generated near the tip of the rear end surface of the through hole, and fine dust accumulates, so that the angle between the rear end surface with respect to the flow direction of the swirling airflow becomes an obtuse angle. Forming. However, in this case, in the flow that passes through the through hole of the filtration filter from the flow of the swirling airflow, the collision at the time of passing through the through hole is reduced, and a smoother passage is induced. The sucked thread-like dust (hair, pet hair, and long and thin fiber lint, etc.) is guided to the filter filter through-hole along with the suction airflow, and is easily pierced. Other dust adheres to the dust, and the cotton dust grows large with the thread-like dust as the core. Then, when the collected dust is discharged, cotton dust or hair is caught in the through hole of the filtration filter, which causes a problem that it cannot be easily discharged.

  Further, in the type that swivels in the vertical cyclone cylinder described in Patent Document 1, it relates to the position of the suction port / the area of the suction port / the volume of the cyclone portion / the area of the ventilation port on the exhaust side. As in the form described in Document 1, since the positions of the suction port and the exhaust side vent are located above the swirl tube container, the air at the bottom of the swirl container at the time when suction is started The swirling airflow that has flowed in from the suction port is descending swirling airflow that descends from the suction port toward the bottom of the container, and the rising swirl that rises from the bottom of the container to the exhaust side. As a result, it becomes a swirling airflow with an elliptical orbit that is inclined by the airflow that flows. It was.

  The present invention solves the above-mentioned conventional problems, and in particular prevents thread-like dust from entering the through hole of the filtration filter and tangling it to block the through hole or preventing the collected dust from being easily dropped. An object of the present invention is to provide a vacuum cleaner that can maintain its function for a long time and can easily discharge dust after cleaning work.

In order to achieve the above object, an electric vacuum cleaner of the present invention includes an electric blower that emits suction air, and a dust separation unit that is installed upstream of the electric blower and introduces air containing dust sucked by the electric blower. A dust containing part for containing the dust separated by the dust separating part, and the dust separating part is provided with a swirling air circulation air passage for flowing air containing dust introduced from a suction port as a swirling air flow. A filtration filter that forms at least a part of the air circulation air passage; a space on which the suction force of the electric blower acts is provided on an outer periphery of the filtration filter; and the filtration air flow is generated in the direction of the dust container. In the vacuum cleaner in which the ventilation part of the filter is configured on the dust container side from the suction port, the swirling airflow descends from the suction port toward the bottom side of the dust container part. A revolving airflow and an upward swirling airflow that soars from the dust accommodating portion toward the ventilation portion of the filtration filter on which a suction airflow acts are formed, and the ventilation portion of the filtration filter faces the downward swirling airflow direction. A dust entry prevention guide and a dust entry prevention guide facing the upward swirling airflow direction are provided.

  With this configuration, the dust entry prevention guide provided in the through-hole, which is the ventilation part of the filtration filter, prevents the entry of thread-like dust, thus preventing the thread-like dust from sticking into the through-hole and becoming entangled or clogged. it can. Furthermore, since the guides provided in the through holes are configured to correspond to the flow directions of the downward swirling airflow and the rising upward swirling airflow, the opportunity for thread dust to enter the entire circumference of the inner cylindrical filter is obtained. When the dust is discharged after the cleaning operation is completed, the dust including the thread-like dust does not get entangled with the through hole of the separation filter, so that the dust can be easily discharged.

  In the vacuum cleaner according to the present invention, the dust intrusion prevention guide provided in the through hole, which is the ventilation portion of the filtration filter, against the flow of the airflow swirling in the elliptical orbit inclined in the cylinder obstructs the entry of the thread-like dust. Therefore, it is possible to prevent the thread-like dust from sticking into the through-hole and becoming entangled or clogged. For this reason, when the dust is discharged after the cleaning operation is finished, the dust including the thread-like dust does not get entangled with the through hole of the filtration filter, and the dust can be easily discharged.

  According to a first aspect of the present invention, there is provided an electric blower that emits suction air, a dust separation unit that is installed upstream of the electric blower and introduces air containing dust sucked by the electric blower, and dust separated by the dust separation unit And a dust-storing part that houses the air containing dust introduced from the suction port as a whirling airflow, and forms at least a part of the swirling-air circulation airway. A filtration filter is provided, a space on which the suction force of the electric blower acts is provided on an outer periphery of the filtration filter, and the ventilation portion of the filtration filter is formed from the suction port so that the swirling airflow is generated in the direction of the dust container. In the electric vacuum cleaner configured on the dust container side, the swirling air current is drawn from the suction port toward the bottom side of the dust container part, and the swirl airflow is sucked from the dust container part A flow of an upward swirling airflow that rises toward the ventilation portion of the filtration filter on which a flow acts is formed, and a dust intrusion prevention guide facing the downward swirling airflow direction and the upward swirling airflow direction are formed in the ventilation portion of the filtration filter It is the vacuum cleaner characterized by each providing the dust approach prevention guide which opposes.

  With this configuration, the dust entry prevention guide provided in the through hole, which is the ventilation part of the filtration filter, prevents the entry of thread-like dust and prevents the thread-like dust from sticking into the through-hole and becoming entangled or clogged. can do. In addition, the dust entry prevention guide provided in this through-hole is configured to correspond to the flow direction of the descending swirl airflow and the ascending swirl airflow, respectively, preventing the entry of thread dust over the entire circumference of the inner cylindrical separation filter can do.

In the second invention, in particular, the filtration filter of the first invention is a filter opened by etching, and the opening hole is processed in an oblique direction, and the oblique direction of the opening hole is: An inclined surface inside the opening hole is arranged such that the direction of the airflow flowing through the opening hole is opposite to each of the downward swirling airflow direction and the upward swirling airflow direction in the swirling flow. However, it has a function as the dust entry prevention guide.

  With this configuration, when the dust-containing air swirling on the surface of the filtration filter is drawn in the direction of passing through the through-hole of the filtration filter, the swirling dust-containing air has a through-hole that has an acute angle with respect to the swirling flow direction. Colliding with the front end surface, thread-like dust will bounce back to the front end surface and ride on the swirling airflow again, resulting in only the separated air passing through the through hole. It is not necessary to provide a thread, and it is possible to suppress the sticking of the filamentous dust without disturbing the flow in the turning passage.

  According to a third aspect of the invention, in particular, the opening holes of the filtration filter according to the first aspect or the second aspect of the invention are arranged such that the opening hole rows and the non-opening hole rows are alternately arranged in a lattice arrangement, and the vector direction of the swirl airflow is They are arranged in parallel.

  With this configuration, the opening hole array and the non-opening hole array are alternately arranged in parallel with the vector direction of the swirling airflow. Therefore, the opening hole is removed from the swirling airflow including dust passing over the non-opening hole array. It does not pass through, and therefore the chance of thread-like dust getting caught in the opening hole is reduced, so that dust catching can be further suppressed.

  The fourth aspect of the invention is characterized in that a partition that rectifies the swirling airflow along the airflow direction of each of the descending swirling airflow and the ascending swirling airflow is provided in the dust separation part of the first to third inventions. Is.

  With this configuration, the swirling airflow of the dust-containing air in the separation filter flows along the swiveling guide ribs near the filter surface, so that the disturbance of swirling flow is suppressed, and the effect of the guide that prevents the sticking of filamentous dust is sufficiently achieved. Can be increased.

(Embodiment 1)
1 and 2 show a vacuum cleaner according to Embodiment 1 of the present invention.

  As shown in FIG. 2, an electric blower 21 that generates a suction airflow is built in the cleaner body 1, and wheels 3 and casters 4 are attached to the outside of the cleaner body 1. The floor can be moved freely. Further, a dust collection case 5 for introducing air containing dust sucked by the electric blower 21 is detachably installed on the upstream side of the electric blower 21 through a partition wall 26 having a vent. Has been.

  The dust collecting case 5 has a shape in which a plurality of hollow cylinders having different diameters are connected in multiple stages. In the first embodiment, the dust collecting case 5 has a three-stage configuration, and in order from the upper stage, the case upper part 22a, the case central part 22b, The case upper portion 22a and the case center portion 22b serve as a dust separation portion 23, and the case upper portion 22a is provided with a suction port 6 for introducing air containing dust from the tangential direction. Yes.

  The dust collection case 5 communicates from the suction port 6 to the dust container 24 for depositing the lowest level dust, and the air path from the suction port 6 to the electric blower 21 is connected to the dust separation unit 23 of the dust collection case 5. The opening 25 provided is formed so as to communicate with the partition wall 26 of the cleaner body 1. Furthermore, a cylindrical filtration filter 27 is installed in the dust separator 23.

  Further, as shown in FIG. 1, a suction hose 7 and an extension pipe 8 are sequentially connected to the suction port 6, a suction tool 9 is attached to the tip of the extension pipe 8, and the electric blower 21 is operated. The dust on the floor in the house can be sucked.

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

  The first filtration filter 27a and the second filtration filter 27b are arranged in the middle of a main air passage 29a that is a first air passage where the suction port 6 of the dust collecting case 5 and the electric blower 21 communicate with each other. .

  The main air passage 29a extending from the suction port 6 to the electric blower 21 is provided over the entire circumference of the space from the first filtration filter 27a to the outer periphery of the second filtration filter 27b.

  Further, a third filtration filter 28 is provided in the dust container 24, and a secondary air passage 29 that communicates from the third filtration filter 28 to the second filtration filter 27 b and the electric blower 21 is provided.

  Next, the details of the dust collection case 5 and the cylindrical filter 27 will be described with reference to FIGS. 3 (a), 3 (b), 3 (c), and 3 (d).

  As shown in FIG. 3 (a), the dust collecting case 5 has a shape in which vertical hollow cylinders are arranged in three stages, and the suction port 6 is a circle of the case upper portion 22a as shown in FIG. 3 (c). It arrange | positions in the eccentric position so that airflow may flow in from the tangential direction of a circumferential cross section. In the first embodiment, the dust collecting case 5 is a hollow cylinder, but the cylinder 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. The inflow airflow should just be a shape which a whirling airflow produces along the inner surface of the dust collection case 5. FIG.

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. It is sufficient that the airflow has a shape that can be generated in the cylindrical hollow portion in the first filtration filter 27a. Moreover, even if the suction port 6 is located at the center, any configuration may be used as long as a swirling airflow is generated in the guide path or the guide.

  Accordingly, the swirl air flow generated along the inner surface of the case upper portion 22a in the dust separation portion 23 and the passage forming the swirl air flow generated in the cylindrical hollow portion in the first filtration filter 27a is used as the swirl air circulation air passage. is there.

  In addition, the suction port 6 provided in the case upper portion 22a is arranged at the lower end of the suction port 6 from the upper end of the opening 25 provided in the dust separation unit 23 so that the generated swirling airflow is generated in the direction of the dust container 24. Is arranged on the upper side, and the ventilation portion of the cylindrical filter 27 is further arranged on the dust accommodating portion 24 side than the suction port 6. In this way, the arrangement position of the suction port 6 is made higher than the opening portion 25, and the ventilation portion of the cylindrical filter 27 is configured on the dust accommodating portion 24 side from the suction port 6, so The air introduced from the tangential direction is generated as a swirling airflow in the direction of the dust container 24, which is the lower direction, by the action of the suction force on the opening 25 side. A dust container 24 for depositing the sucked dust is provided at the lower part of the dust collecting case 5, and the bottom surface of the dust collecting case 5 on the dust container 24 side is an open / close lid 31. The opening / closing lid 31 is opened via 32 and the dust in the dust container 24 can be discharged.

Further, as shown in FIG. 3B, the outer wall between the dust collection case 5 and the cylindrical filter 27 is formed on the inner wall between the suction port 6 of the cylindrical dust collection case 5 and the dust container 24. A space portion 33 provided around the periphery is formed, and the inside of the dust collecting case 5 and the suction port of the electric blower 21 communicate with each other through the space portion 33.

  Furthermore, the inner surface 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.

  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.

  Here, in the present embodiment, a metal filter provided with a through hole having a minute opening with a through hole diameter of 100 to 300 microns is used as the first filtration filter.

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

  In the first embodiment, as shown in FIGS. 3D and 4, in particular, a sheet-like filter in which a PTFE film having a through-hole diameter of about 0.5 microns is made rigid with PET resin is pleated. A fold-folded filter 41 is used in which both ends are connected to form a cylinder.

  In addition, in the outer peripheral portion of the fold-folded filter 41, the indented portion 42 on the inner surface of the fold-shaped member that corresponds to the upstream side of the suction airflow has a substantially U shape with a roundness of about R = 2 to 5 mm. The folds on the side close to the first filtration filter 27a of the fold-fold filter 41 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 comprised as mentioned above, the operation | movement is demonstrated based on Fig.5 (a), FIG.5 (b), FIG.5 (c).

When the electric blower 21 is started to operate, 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 suction hose 7. At this time, since the suction port 6 of the dust collection case 5 is installed eccentrically in the tangential direction with respect to the cylindrical cross section, as shown in FIG. It enters from the tangential direction of the cylindrical section and changes to a swirling airflow.

  Here, since the lower end of the suction port 6 is disposed above the upper end of the opening 25, the airflow flowing from the suction port 6 has a swirling component and also has a downward component. Therefore, the swirling airflow generated in the case upper portion 22 a of the dust collecting case 5 descends while swirling and reaches the vicinity of the cylindrical filtration filter 27. Then, as shown in FIG. 5B, a part of the air sequentially passes through the first filtration filter 27 a and the second filtration filter 27 b, and is sucked into the electric blower 21 through the space portion 33.

  The dust sucked together with the suction airflow is guided to the cylindrical filtration filter 27 while swirling with the flow of the airflow. Among the dust, fine dust 51 such as sand dust passes through the first filtration filter 27a. And filtered by the second filter filter 27b on the outside.

  As shown in FIG. 5 (c), the dust-containing air swirling in the dust separation unit 23 and the container including the dust storage unit 24 is separated by the flow of the main air passage 29a and the sub air passage 29b. The

  When the electric blower 21 is turned on, the air in the entire container including the dust separator 23 and the dust container 24 is sucked in, and then the suction air flows in the order that the air flows in from the suction port 6. .

  The air from the suction port 6 receives the action of the swirling component and becomes a swirling airflow 61. The swirling airflow 61 passes through the case central portion 22b where the sucking airflow 62 acts and descends toward the bottom of the dust container 24. The descending swirl airflow 63a flows into the case central portion 22b where the suction airflow 62 acts from the dust accommodating portion 24, and then flows into the upward swirling airflow 63b. A swirling air passage a64 is formed by the flow.

  That is, the swirl air passage a64 is in a state in which an elliptical orbit is drawn in an oblique direction in the container. However, the dust having a high specific gravity does not get on the rising swirling airflow, and the swirling air passage b65 that continues to swirl in the dust container 24 is formed. The above-described elliptical orbit swirling air passage a64 is in a state in which thread-like dust having a low specific gravity turns on an air current.

  Next, the first filtration filter 27a will be described in detail.

  FIG. 7A is a sectional view showing a sectional structure of the cylindrical first filtration filter 27a in FIG. 5B. As shown in FIG. 7A, the cylindrical first filtration filter 27a is When the inner peripheral surface is the upstream filter surface 71 and the outer peripheral surface is the downstream filter surface 72, the inner peripheral side of the first filtration filter 27a is located above the dust container 24, and there is a swirl wind. The airflow in the path a64 is swirling along the upstream filter surface 71. 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 arrange | positioned in the downstream. Is done. In the first filtration filter 27a, a plurality of inclined through holes 73 penetrating from the upstream filter surface 71 to the downstream filter surface 72 are formed so as to be distributed over substantially the entire area of the filter surface.

  As shown in FIG. 7B, the through-hole 73 of the first filtration filter 27a has a central axis 74 of the through-hole 73 inclined at an inclination angle Φ with respect to the direction of the normal 75 of the filter surface. The vector component in the X direction in the vector direction penetrating from the upstream opening 73a to the downstream opening 73b is opposite to the traveling direction of the swirling airflow.

  The first filtration filter 27a configured as described above operates as follows.

  FIG. 8 is a diagram for explaining the operation using the thread-like dust 52c as an object. As shown in FIG. 8A, long thin thread-like dust 52c such as hair rides on the airflow of the swirling air passage a64 and swirls on the upstream side of the filter 27a. A part of the airflow in the swirling air passage a <b> 64 is folded near the upstream opening 73 a of the through hole 73, flows through the through hole 73, and exits downstream as the suction airflow 62.

  When the long and thin thread-like dust 52 c approaches the through-hole 73, the leading portion of the thread-like dust 52 c is drawn into the through-hole 73 by the suction airflow 62. At that time, since the inclination direction of the through hole 73 penetrating from the upstream opening 73a to the downstream opening 73b is inclined in the opposite direction to the traveling direction of the swirling airflow, When the thread-like dust 52c is about to enter the through-hole 73, the tip of the thread-like dust 52c collides with the inclined surface 76 inside the through-hole 73 entrance, and the entry into the back of the through-hole 73 is hindered. . That is, the inclined surface 76 inside the through hole serves as a guide for preventing dust from entering.

  Further, since the long and thin thread-like dust 52c swirls on the swirling airflow and has inertial force, once it collides with the inclined surface 76 inside the throughhole 73 inlet, the inertial force causes the throughhole 73 to move. Try to pass. Further, a force pushed by the swirling airflow 64 is also applied to the portion other than the head portion of the thread-like dust 52c, and it is carried forward of the through hole 73 and swivels the head portion being drawn into the through hole 73. The air is pulled in the opposite direction by the force of the airflow in the swirling air passage a64 (see FIG. 8B).

  Since the strong force of the airflow of the swirling swirling air passage a64 applied to the part other than the head part of the thread-like dust 52c pulls the head part of the dust 52c entering the through hole 73 to the upstream side, the head part of the thread-like dust 52c. Slips through the inclined surface 76 in the through hole 73 and is pulled back to the inside of the first filtration filter 27a.

  Then, the thread-like dust 52c continues to ride on the airflow of the swirling air passage a64 in the first filtration filter 27a and is guided to the dust container 24 located below.

  On the other hand, even if the thread-like dust 52c has the same length, once the thread-like dust 52c enters the through-hole 73, the first dust-like dust 52c is sucked in by the suction airflow 62 in the through-hole 73 and is first. It passes through the filtration filter 27a and reaches the second filtration filter 27a disposed downstream.

  In addition, the inertial force generated by the airflow of the turning swirl air passage a64 is such that the action of the same inertial force as described above is more strongly applied to dust having a large specific gravity that is easily affected by the inertial force. In the case of dust having a specific gravity larger than that of the thread-like dust 52c, the inertial force due to the swirling airflow is more strongly received, and the through-hole 73 is forced to pass through, so that the suction force of the suction airflow 62 does not have to be drawn.

  Next, the inclination direction of the through hole 73 will be described in detail with reference to FIG. FIG. 9 is a schematic view showing an enlarged image of the inclination direction of the through hole 73 in a state where the filtration filter 27a is mounted in the dust separator 23, as viewed from the inside (upstream side) of the cylindrical filtration filter 27a. FIG.

As shown in the figure, the vector direction of the through-hole central axis 74 from the upstream opening 73a to the downstream opening 73b in the through hole 73 of the first filtration filter 27a is opposite to the traveling direction of the swirling air flow 64 ( Positioning at 180 degrees is the most effective in preventing clogging of dust intrusion into the through-hole 73 (see FIG. 9A), and the thread-like dust 52c that has entered the through-hole 28 is removed. The effect of pulling back to the upstream side of the first filtration filter 27a is obtained by the inertial force or the force of the swirling airflow 64. Therefore, it is necessary to match the flow swirling in the container. In this embodiment, FIG. 9 (a) shows the descending orbit of the descending swirling airflow 63a in order to take the arrangement according to the oblique elliptical orbit in the container. As shown in FIG. 9B, the ascending trajectory range of the ascending swirl airflow 63b is set so that the directions of the oblique through holes 73 are opposed to each other in the descending trajectory range and the ascending trajectory range. Thereby, it is possible to suppress the sticking to the first filtration filter 27a in the dust separator 23 and to surely promote dust accumulation in the lower dust container 24.

  Here, in the arrangement of the infinite number of through holes 73 formed in the first filtration filter 27a, when the arrangement is made in a lattice shape parallel to the vector direction of the swirling airflow as shown in FIG. In the width direction of the track ventilation path (perpendicular to the vector direction of the swirling airflow), the opening hole rows and the non-opening hole rows are arranged alternately, and the ventilation and non-ventilation are arranged in parallel. Compared with the through hole arrangement in which the non-opening hole row is arranged in the horizontal arrangement (opening hole row is triangular pitch) as shown in FIG. 10 (b), the dust passing over the non-opening hole row is reduced. The contained swirling airflow does not pass through the opening hole, and therefore, the opportunity for thread-like dust to be caught in the opening hole is reduced, so that the dust catching can be further suppressed.

  Moreover, as shown in FIG. 11, if the partition wall 111 for guiding the turning trajectory is disposed in this non-ventilated portion, the most effective turning trajectory in the opposite direction with respect to the above-described oblique through hole is restricted. Therefore, the effect of preventing clogging of dust intrusion into the through hole 73 can be further enhanced.

  As described above, according to the present invention, thread-like dust is prevented from getting entangled with the filter, ensuring a high suction work rate, and maintaining the burden of maintenance work such as cleaning the filter and discharging dust. It can be greatly reduced, and can be used not only for household vacuum cleaners but also for various types of vacuum cleaners such as commercial vacuum cleaners.

Overall view of the electric vacuum cleaner according to Embodiment 1 of the present invention Sectional drawing which shows the structure of the main part of the vacuum cleaner (A) Front sectional view of the dust collecting case of the electric vacuum cleaner (b) Side sectional view of the dust collecting case (c) A sectional view (b) AA sectional view (d) (b) BB sectional view Sectional drawing of the principal part of the 2nd filtration filter of the same vacuum cleaner (A) Flat sectional view showing the airflow near the suction port in the dust collecting case of the vacuum cleaner (b) Flat sectional view showing the flow of the airflow near the filtration filter in the dust collecting case (c) In the dust collecting case Longitudinal section showing the flow of airflow in the vertical direction Schematic showing the flow of suction airflow of the vacuum cleaner (A) Main part sectional drawing which shows the structure of the filtration filter which concerns on Embodiment 1 (b) Main part sectional drawing of the filtration filter which expanded the A section of (a) (A) Explanatory drawing of separation operation | movement which isolate | separates the filamentous dust of Embodiment 1 (b) Explanatory drawing of separation operation | movement which isolate | separates the filamentous dust of Embodiment 1. (A) Explanatory drawing of the inclination direction of the through hole 28 of the filtration filter (b) Explanatory drawing of the inclination direction of the through hole 28 Explanatory drawing of the through-hole arrangement | positioning in the 1st filtration filter of the same vacuum cleaner Explanatory drawing of through-hole arrangement compared with the 1st filtration filter of the vacuum cleaner

Explanation of symbols

6 Suction port 21 Electric blower 23 Dust separator 24 Dust container 27 Cylindrical filter 111 Bulkhead

Claims (4)

An electric blower that emits suction air, a dust separation unit that is installed on the upstream side of the electric blower and introduces air containing dust sucked by the electric blower, and a dust storage unit that stores the dust separated by the dust separation unit The dust separation unit is provided with a swirling air circulation air passage that flows air containing dust introduced from the suction port as a swirling air current, and includes a filtration filter that forms at least a part of the swirling air circulation air passage, A space where the suction force of the electric blower acts is provided on the outer periphery of the filtration filter, and the ventilation portion of the filtration filter is configured on the dust container side from the suction port so that the swirling airflow is generated in the direction of the dust container. In the vacuum cleaner, the swirling airflow acts as a descending swirling airflow that descends from the suction port toward the bottom side of the dust container, and a suction airflow from the dust container. A flow of an upward swirling airflow that rises toward the ventilation portion of the filtration filter is formed, and a dust intrusion prevention guide that faces the downward swirling airflow direction and a dust that faces the upward swirling airflow direction are formed in the ventilation portion of the filtration filter An electric vacuum cleaner provided with an entry prevention guide. The filtration filter is a filter opened by etching, and the opening hole is processed so as to be in an oblique direction, and the oblique direction of the opening hole is the downward swirling air flow direction in the swirling flow as well as the above By arranging the direction of the airflow flowing through the opening hole to be opposite to each of the upward swirling airflow directions, the inclined surface inside the opening hole functions as the dust intrusion prevention guide. The electric vacuum cleaner according to claim 1 made. 3. The filter filter according to claim 1, wherein the apertures of the filtration filter are arranged in an array of apertures and non-apertures alternately in a lattice arrangement and parallel to the vector direction of the swirling airflow. The vacuum cleaner described. The partition which rectifies | straightens the swirl | vortex airflow along each airflow direction of the said downward swirl | vortex airflow and the said ascending swirl | vortex airflow was provided in the said dust separation part. Electric vacuum cleaner.