JP2005046417A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner excellent in handleability which allows cleaning operation to be continued even when waste which is not gas-permeable such as a plastic bag is sucked. <P>SOLUTION: In the vacuum cleaner, a dust collection part 11 has: a suction port 26 into which suction air flows; a coarse dust collection means (not shown in the figure) for collecting sucked coarse dust; and a centrifuging chamber 23 for centrifuging dust after passing through the coarse dust collection means from the suction air. The dust collection part 11 is provided with a bypass passage 29 for communicating the suction port 26 and the centrifuging chamber 23 without through the coarse dust collection means. Thus, if by any chance the coarse dust collection means is clogged with dust having flown in from the suction port 26, the suction air including the dust flows into the centrifuging chamber 23. Thus, the suction force by an electric blower is not caused to remarkably decrease, and the cleaning work can be carried out for a long period. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner provided with a centrifugal dust collecting section that swirls intake air to separate dust.

As a conventional vacuum cleaner with a centrifugal separator, a pre-filter for filtering coarse dust and a pleated main filter on the downstream side of the vacuum cleaner are installed to swirl suction air containing dust sucked up from the suction tool. Filter the large dust (coarse dust) with the pre-filter, filter the small dust (fine dust) that could not be filtered with the pre-filter with the main filter, and then exhaust only the clean air through the electric blower. There was what was trying to discharge | emit from a mouth (for example, refer patent document 1).
JP 2000-342492 A

  However, in vacuum cleaners such as those described above, if suction tools with a relatively low specific gravity and large volume, such as vinyl bags and tissue paper, are sucked, they will adhere to the surface of the prefilter for a moment. As a result, there is a problem that the intake air volume is reduced and intake cannot be performed. In particular, when the control is performed to reduce the input of the electric blower in order to detect a decrease in the air volume as dust accumulates and display a full display or to prevent the electric blower from being burned, If you accidentally smoke a plastic bag or tissue paper even though you haven't smoked much, and the airflow suddenly drops and the input falls, the user will feel uncomfortable and misunderstand that the vacuum cleaner has failed There was a problem.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object of the present invention is to provide an easy-to-use electric vacuum cleaner that can continue the cleaning work even if a non-breathable garbage such as a vinyl bag is sucked.

  In order to achieve the above object, the present invention provides an electric blower that generates suction air, a suction device that communicates with the electric blower and sucks dust, and a dust collector that separates and collects sucked dust from suction air. And the dust collecting part is configured to collect the dust after passing through the suction port through which the suction air from the suction tool flows, the coarse dust collecting means for collecting the sucked coarse dust, and the coarse dust collecting means. Dust that has a centrifuge chamber that centrifuges with suction air and that has a bypass passage that communicates the suction port and the centrifuge chamber without passing through the coarse dust collecting means. Even if the coarse dust collecting means is blocked, the suction air containing dust flows into the centrifugal separation chamber, so that the suction force by the electric blower is not significantly reduced and the cleaning operation can be performed for a long time.

  The electric vacuum cleaner of the present invention can be an easy-to-use electric vacuum cleaner that can continue the cleaning operation even when sucking non-breathable garbage such as vinyl bags.

  The first invention includes an electric blower that generates suction air, a suction tool that communicates with the electric blower and sucks dust, and a dust collection unit that separates and collects the sucked dust from the suction air, The dust collecting unit includes a suction port through which the suction air from the suction tool flows, a coarse dust collecting unit that collects the sucked coarse dust, and a centrifugal separation of the dust after passing through the coarse dust collecting unit. A bypass passage that communicates the suction port with the centrifugal separation chamber without passing through the coarse dust collecting means, and collects coarse dust with dust flowing in from the suction port. Even if the means is blocked, the suction air containing dust flows into the centrifugal separation chamber, so that the suction force by the electric blower is not significantly reduced and the cleaning operation can be performed for a long time.

  According to a second aspect of the present invention, there is provided a coarse dust storage chamber for storing the dust collected by the coarse dust collecting means, a dust transfer path that communicates the suction port and the coarse dust storage chamber, and the dust transfer path is substantially straight. As a result of the swirling force, the coarse dust is less likely to flow into the centrifugal separation chamber, and the collection efficiency of the coarse dust in the coarse dust storage chamber is increased.

  In the third aspect of the present invention, the inlet opening of the bypass passage is arranged at or near the suction port. Since the bypass passage can be formed short, the air pressure loss is reduced, and the suction force is not easily lowered.

  According to a fourth aspect of the present invention, the suction port is formed in a substantially cylindrical shape, an opening having a predetermined width is formed from the outer periphery of the cylindrical portion, and the opening is used as the inlet opening of the bypass passage. The suction air containing dust flowing in from the mouth does not flow directly into the inlet opening of the bypass passage, but once enters the coarse dust chamber, so that the coarse dust chamber can be used efficiently and the coarse dust flowing into the centrifuge chamber. The amount of can be reduced.

  In the fifth aspect of the invention, the direction of the suction air flowing into the inlet opening is opposite to the direction of the suction air flowing into the suction port. At the same time, it enters the coarse dust storage chamber vigorously, is captured there, and does not flow into the bypass passage from the inlet opening, so that the coarse dust storage chamber and the centrifugal separation chamber can be used effectively.

  According to a sixth aspect of the present invention, there is no member such as a filter that prevents the flow of dust, such as a filter, in the inlet opening, and the inlet opening is not blocked by dust. The centrifuge function can be fully utilized.

  According to a seventh aspect of the invention, the bottom surface of the dust transfer path is positioned below the lower end of the end portion on the side of the coarse dust storage chamber of the suction port, and when taking out the dust collecting portion in which dust has accumulated, When carrying it, dust inside it, especially sand dust that tends to collect at the bottom, is prevented from flowing into the suction port, so that they do not leak out and the waste disposal operation can be performed hygienically.

  In the eighth aspect of the invention, the bottom surface of the coarse dust storage chamber is positioned below the bottom surface of the dust transfer path, and dust in the coarse dust storage chamber can be prevented from easily flowing into the dust transfer path. When carrying the dust part, it is possible to prevent dust leakage to the outside more reliably.

  According to a ninth aspect of the present invention, a partition wall substantially equal to the height of the coarse dust storage chamber is extended rearward from the end of the dust transfer path on the side where the inlet opening of the bypass passage is formed. Among the dust flowing in from the part side, especially light fibrous dust is easily sucked by the suction force acting on the bypass passage, but because there is a partition wall, it is not easily sucked into the bypass passage, It is reliably collected in the dust chamber.

  In the tenth aspect of the invention, the end of the partition wall is inclined toward the side wall of the coarse dust storage chamber, and the airflow flowing from the suction port smoothly flows into the space formed by the partition wall and the side surface. The airflow once entered can be reliably prevented from easily returning to the dust transfer path due to the inclination provided at the end of the partition wall.

  In an eleventh aspect of the invention, the rear wall of the coarse dust storage chamber is formed by a part or the whole of the coarse dust collecting means, and the portion facing the rear opening of the dust transfer path is made non-ventilated. In addition, since it can be prevented that the dust is concentrated in a portion facing the rear opening of the dust transfer path, the collection area of the coarse dust collecting means can be effectively utilized.

  In a twelfth aspect of the present invention, a wall surface protruding toward the coarse dust storage chamber is formed at least at a lower portion of the end of the suction port on the coarse dust storage chamber side. Garbage that tends to collect at the bottom, such as garbage, is blocked by the wall surface and does not flow to the suction port, so that it is possible to prevent waste from leaking to the outside.

  In a thirteenth aspect of the present invention, the coarse dust collecting means is disposed on the upper surface and the rear wall of the coarse dust containing chamber, and at least a portion outside the partition wall of the coarse dust collecting means on the upper surface is made air-impermeable. It reduces the degree of dust compression between the wall and the inner wall of the dust collection case, and facilitates the disposal of dust.

  In a fourteenth aspect of the present invention, a dust disposal line is displayed on the outer surface of the coarse dust storage chamber on the side where the partition wall is formed, and the accumulation of dust in the coarse dust storage chamber forms a partition wall with a large amount of passing air. Starting from the opposite side and finally depositing on the side on which the partition wall is formed, providing a dust disposal line on the side on which the partition wall is formed can inform the user of the correct disposal time .

  According to a fifteenth aspect of the present invention, an inflow port through which most or all of the suction air flows is provided in the centrifugal separation chamber, and the inflow port and the partition wall are disposed on opposite sides of the suction port center. Is almost carried out on the inlet side and less on the opposite partition wall side, so that it is easy to take out the dust accumulated between the partition wall and the inner wall of the dust collecting case.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
Hereinafter, the vacuum cleaner in the 1st Embodiment of this invention is demonstrated using FIGS.

  1 and 2, a vacuum cleaner 1 has a suction tool 3 for sucking dust attached to an extension pipe 2, and the extension pipe 2 has a handle 4 at one end and a hose joint 5 at the other end. A vacuum cleaner main body 7 (hereinafter referred to as a main body 7) is connected via a hose 6. The main body 7 includes one front wheel caster 8 that is rotatably supported and a pair of rear wheels 9.

  As shown in FIG. 2, the recess 10 formed in the front in the main body 7 is sucked from the suction tool 3, passes through a suction passage (not shown) in the extension pipe 2 and the hose 6, and is transferred to the main body 7. A dust collecting case 11 serving as a dust collecting part for separating and collecting the collected dust from the suction air is detachably mounted. In addition, an electric blower 12 for generating suction air is incorporated behind the recess 10 of the main body 7. The suction side of the electric blower 12 communicates with the air suction portion 14 through the opening 13.

  The air suction portion 14 is surrounded by an inclined seal surface 15 that comes into contact with the dust collection case 11 when the dust collection case 11 is placed in the recess 10 of the main body 7. An exhaust filter 16 is also provided behind the main body 7, and exhaust gas from the electric blower 12 that passes through the exhaust filter 16 is discharged to the outside of the main body 7. Further, the main body 7 has other parts, that is, an electric system such as a control unit 17 for controlling power consumption of the electric blower 12 and a cord (not shown) for supplying power to the electric blower 12 in the main body 7. A winding device for winding a cord (not shown) or the like is incorporated.

  A front wall 18 of the main body 7 rises from a bottom wall 19, and the bottom wall 19 is a lower end surface of the recess 10. An air inlet 20 for detachably connecting the hose joint 5 is provided at a substantially central portion of the front wall 18. The seal packing 21 is attached to the end face of the air inlet 20 on the side of the recess 10 to prevent air leakage between the air inlet 20 and the dust collecting case 11.

  As shown in FIGS. 3 to 8, the dust collection case 11 includes a coarse dust storage chamber 22 that is provided in a lower portion of the dust collection case 11 and collects coarse dust from the dust-containing airflow flowing from the air inlet 20. The centrifuge chamber 23 is superposed on the coarse dust chamber 22 and is superposed on the upper side in this embodiment, and the centrifuge chamber 23 for separating fine dust from the airflow from which coarse dust is almost removed, and the centrifuge chamber 23. Are formed in parallel with the coarse dust storage chamber 22 and the fine dust storage chamber 24 for accumulating fine dust centrifuged in the centrifugal separation chamber 23 is formed. The fine dust storage chamber 24 is partitioned and partitioned from each other.

  A substantially cylindrical suction port 26 is formed in the case front wall 25 of the dust collection case 11, and one end of the suction port 26 is connected to the suction port 20 in a state where the dust collection case 11 is set in the main body 7. Concentric and communicated, and the other end communicates with the coarse dust storage chamber 22 via a dust transfer path 31 formed in a substantially linear shape, and the suction air flowing from the suction port 26 is bent halfway, It directly flows into the coarse dust chamber 22 without turning.

  The dust transfer path 31 is located above the bottom surface 22 a of the coarse dust chamber 22 and below the rear end 26 b of the suction port 26.

  Furthermore, a projecting wall 26 c that projects toward the coarse dust chamber 22 is provided at least at the lower portion of the suction port 26.

  The coarse dust storage chamber 22 has a dust storage chamber lid 27 that can be freely opened and closed at the bottom, and a primary filter A 32 a is provided on the upper surface and a primary filter B 32 b is provided on the rear surface as coarse dust collecting means for collecting large dust. They communicate with the centrifugal separation chamber 23 through the communication passage 23a, and the collected coarse dust is accumulated in the coarse dust storage chamber 22.

  Moreover, the center part 32c which opposes the back opening part of the dust transfer path 31 of primary filter B32b is made into air permeability (refer FIG. 7).

Reference numeral 29 denotes a bypass passage that bypasses the coarse dust storage chamber 22 in an air passage and communicates the dust transfer passage 31 and the communication passage 23a. The inlet opening 29a has an inlet 26 as shown in FIG. Is formed with an opening having a predetermined width W from the outer periphery of the cylindrical portion 26a. The step D between the end 29b of the inner wall on the side opposite to the cylindrical part 26a forming the inlet opening 29a and the rear end 26b of the cylindrical part 26a is set to zero or more.

  6 and 7, reference numeral 41 denotes a partition wall provided on the side of the inlet opening 29 a of the dust transfer path 31, the height of which is substantially the same as the height of the coarse dust storage chamber 22, and the rear of the dust transfer path 31. It extends backward from the end. Furthermore, the end of the partition wall 41 is inclined outward, that is, toward the side wall of the coarse dust chamber 22.

  As shown in FIG. 7, the portion 32d on the partition wall 41 side of the primary filter A 32a is not ventilated to prevent suction air from passing therethrough.

  Above the primary filter A32a, a separation chamber wall 28 that forms the centrifugal separation chamber 23 is formed in a substantially cylindrical shape.

  The separation chamber wall 28 is provided with a communication port A30 that guides most of the suction air that has passed through the primary filters A32a and B32b and a sub-communication port A30a that guides the remaining suction air in the centrifugal chamber 23. Any suction air is guided in the inner tangential direction. The communication port A30 and the partition wall 41 are disposed on opposite sides of the suction port 26.

  Further, as shown in FIG. 5, a communication port B33 is formed on the side wall of the separation chamber wall 28 on the suction port 26 side, so that the centrifugal separation chamber 23 and the fine dust storage chamber 24 (see FIG. 6) communicate with each other. Thus, the fine dust centrifuged in the centrifuge chamber 23 passes through the communication port B33 and is conveyed into the fine dust storage chamber 24 as shown by the arrow in the figure.

  As shown in FIGS. 3 and 8, a packing 35 is fitted on the back surface of the dust collecting case 11 so as to surround a tertiary filter U 34 described later. When the dust collecting case 11 is attached to the recess 10, the packing 35 is in a state where it is lightly pressure-bonded to the inclined sealing surface 15 in FIG. 1, and prevents outside air from flowing into the air suction part 14 from outside the main body 7. ing.

  In FIG. 3, reference numeral 37 denotes a secondary filter located substantially concentrically in the centrifuge chamber 23, which is formed integrally with the filter frame 36, has a substantially cylindrical cross section, and has a large number of ventilation openings on the peripheral surface. Further, a non-woven filter 38 for filtering and collecting fine dust is provided behind (on the downstream side), and a detachable tertiary filter U34 is provided in the dust collecting case 11.

  A handle 39 is formed above the front of the dust collection case 11. In the vicinity of the handle 39, a buckle button 40 that is operated when opening and closing the dust storage chamber lid 27 is provided. When the buckle button 40 is operated, a rod (not shown) coupled to the buckle button 40 is interlocked to release the holding lever 42 that closes the dust storage chamber lid 27 under the urging force of a spring (not shown). Can do.

  Further, at least the side wall of the outer shell forming the coarse dust storage chamber 22 of the dust collecting case 11 is formed of a transparent or translucent material, and the timing of disposal of dust accumulated inside on the outer shell surface on the partition wall 41 side. A dust disposal line 43 for informing the user of the above is displayed.

  Next, the operation and action of the above configuration will be described.

  When the electric blower 12 is in an operating state, the air flow including dust sucked from the suction tool 3 passes through the extension pipe 2 and the hose 6 and reaches the suction port 20 and the suction port 26 of the dust collecting case 11. Then, between the suction port 26 and the coarse dust storage chamber 22, straight dust storage is performed via a dust transfer path 31 formed substantially linearly so that the sucked air is not bent or swung in the middle. While entering the chamber 22, it is sprayed to the primary filter B32a at the rear of the coarse dust storage chamber 22, where coarse dust having a projected area larger than the opening area of the opening of the primary filter B32b is collected, and the suction wind is primary. It passes through the filter B32b and heads for the communication port A30 and the sub-communication port A30a (see FIG. 5).

  When the suction air passes through the primary filter B32b, the coarse dust is compressed by receiving the wind pressure that is pressed against the primary filter B32b, so that dust larger than the volume of the coarse dust storage chamber 22 can be accumulated. The effect is particularly great when sucking in fibrous dust such as cotton dust which is bulky with respect to mass.

  Further, the suction air flows particularly strongly on the communication port A30 side in the left-right direction of the primary filter B32b, so that the dust compression effect on the communication port A30 side is great.

  Here, since the central portion 32c of the primary filter B32b facing the rear opening of the dust transfer path 31 is air-impermeable, coarse dust does not accumulate on the central portion 32c all at once. Then, coarse dust is gradually accumulated in the left-right direction of the primary filter B32b.

  At this time, among the dust flowing in from the inlet opening 29 a side of the suction port 26, particularly light fibrous dust or the like is easily sucked by the suction force acting on the bypass passage 29. Therefore, the dust is reliably collected in the coarse dust chamber 22 without being sucked into the bypass passage 29.

  In addition, since the terminal end of the partition wall 41 is inclined outward, a part of the airflow flowing from the suction port 26 smoothly flows into the space formed by the partition wall 41 and the inner wall of the dust collecting case 11. Thus, the airflow once entered can be reliably prevented from easily returning to the dust transfer path 31 due to the inclination provided at the end of the partition wall 41.

  In addition, the suction air flowing from the suction port 26 also passes through the primary filter A32a, so that the suction force does not decrease even if the primary filter B32b is blocked with coarse dust. As coarse dust accumulates on the primary filter B32b, coarse dust begins to accumulate on the primary filter A32a and from the communication port A30 side.

  Then, the air that has passed through the primary filters A32a and B32b flows into the centrifuge chamber 23 through the communication port A30 and the sub-communication port A30a, and in the tangential direction of the separation chamber wall 28 having a substantially cylindrical cross section that forms the centrifuge chamber 23. It flows in and turns into a swirling vortex along the inner surface of the separation chamber wall 28 and swirls in the centrifugal separation chamber 23. Fine dust entering the centrifugal separation chamber 23 is subjected to the centrifugal force generated by the swirling vortex, and is finely blown by the centrifugal force from the communication port B33 while rotating along the inner surface of the separation chamber wall 28. Enter the dust chamber 24.

  The air at the center of rotation of the swirling vortex is almost free from dust. After being filtered by the non-woven filter 38 of the secondary filter 37 and the tertiary filter U34, the electric blower is supplied from the air suction unit 14. 12 is passed through the exhaust filter 16 to further remove dust, and is exhausted to the outside of the main body 7, that is, to the atmosphere.

  As described above, by providing the primary filters A32a and B32b, dust is compressed and an early air flow rate drop due to clogging of the secondary filter 37 in the centrifugal separation chamber 23 can be prevented.

  The amount of coarse dust accumulated in the coarse dust storage chamber 22 of the dust collecting case 11 can be easily confirmed from the outside because the outer shell is transparent or semi-transparent, and when the amount reaches the dust disposal line, Will be discarded.

  When discarding the dust accumulated in the dust collection case 11, the handle 39 is grasped and the dust collection case 11 is lifted and removed from the recess 10 of the main body 7. Next, when the buckle button 40 provided near the handle 39 is operated, the holding lever 42 is released, the dust storage chamber lid 27 is opened, both the coarse dust storage chamber 22 and the fine dust storage chamber 24 are opened at once, The compressed coarse dust and fine dust can be discharged into a trash can or the like.

  Since the portion 32d on the partition wall 41 side of the primary filter A 32a is impermeable, the suction air flowing between the partition wall 41 and the inner wall of the coarse dust storage chamber 22 is only for passing through the primary filter B 32b. The effect of compressing dust is small. Therefore, the dust accumulated between the partition wall 41 and the inner wall of the coarse dust chamber 22 is not so compressed, and therefore, it is not difficult to get caught when the dust is discarded.

  In the dust collection case 11, relatively small and heavy garbage such as sand dust is collected on the bottom surface 22 a of the coarse dust storage chamber 22, but the bottom surface of the dust transfer path 31 is more than the bottom surface 22 a of the coarse dust storage chamber 22. Since it is located higher than the end 26 a of the suction port 26, dust does not spill out of the suction port 26 when the dust collecting case 11 is carried.

  Further, since the suction port 26 is provided with a protruding wall 26c that protrudes toward the coarse dust storage chamber 22, when the dust collection case 11 is carried, the dust collection case 11 is tilted slightly toward the suction port 26. However, sand dust or the like stays behind the protruding wall 26c and does not leak out.

  Even if dust is attached in the dust collection case 11, the dust collection case 11 is entirely made up of resin parts except for assembly screws (not shown) and some parts of a spring material (not shown). Because it is composed of, can be easily washed with water and can be cleaned hygienically.

Next, the operation and action of the bypass passage 29 will be described. When normal dust is being sucked in, as described above, coarse dust is collected by the primary filters A32a and B32b, and fine dust that cannot be removed is collected by the centrifugal separation chamber 23. and bad plastic bag or the like breathable is Ru sucked, it is a primary filter a 32a, in close contact with the surface of the B 32b, conventionally attraction force is significantly reduced, but could not continue the cleaning operation, the present embodiment Then, since the bypass passage 29 for bypassing the coarse dust storage chamber 22 is provided, most of the air flowing in from the suction port 26 now enters from the inlet opening 29a and enters the centrifuge chamber 23 via the bypass passage 29. Since dust is trapped there, cleaning can be continued as it is (see FIGS. 4, 5 and 6).

  Further, since the opening of the inlet opening 29a is formed with a width of a predetermined dimension W from the outer periphery of the cylindrical portion 26a of the suction port 26, the inlet opening 29a against the flow of air flowing from the suction port 26. Since the direction of the air flowing in is reversed, dust in the suction air does not flow directly into the inlet opening 29a during normal use, so that the original function of the coarse dust chamber 22 is not impaired.

  Further, since the inlet opening 29a is provided adjacent to the suction port 26, the bypass passage 29 can be formed short, the air pressure loss can be reduced, and the suction force can be prevented from lowering.

  In the above-described embodiment, the dust transfer path 31 and the communication path 30a are communicated with each other by the bypass passage 29. However, even if the dust transfer path 31 and the centrifugal separation chamber 23 are communicated, the function and action of the bypass passage 29 are the same. It goes without saying that they are the same.

  Further, if the inlet opening 29a is not arranged such as another filter that obstructs the flow of air, it will not be blocked by dust or the like.

  In addition, by making the surface of the primary filter 32 on the side of the coarse dust storage chamber 22 flat without any irregularities, it is possible to reduce the catching of fibrous dust when sucking and compressing coarse dust and to separate dust when discharging dust. By improving the above, waste disposal can be performed hygienically and easily.

  As described above, the vacuum cleaner according to the present invention can maintain the dust collecting function for a long time and can continue cleaning even if it sucks non-breathable garbage such as a plastic bag. Very useful.

Overall appearance view of the vacuum cleaner showing the first embodiment of the present invention Side sectional view of the main body of the vacuum cleaner Cross section of the vacuum cleaner dust collection case AA sectional view of FIG. Perspective view showing the internal structure of the dust collection case BB sectional view of FIG. Lower perspective view of the dust collection case Rear partial perspective view of the dust collection case

Explanation of symbols

11 Dust collection case (dust collection part)
DESCRIPTION OF SYMBOLS 12 Electric blower 22 Coarse dust storage chamber 23 Centrifugation chamber 24 Fine dust storage chamber 26 Suction port 26a Cylindrical part 26b End part 27 Dust storage chamber cover 29 Bypass passage 29a Inlet opening part 30 Communication port A
31 Dust transfer path 32a Primary filter A (coarse dust collecting means)
32b Primary filter B (Coarse dust collecting means)
33 Communication B

Claims (15)

An electric blower that generates suction air, a suction tool that communicates with the electric blower and sucks dust, and a dust collection unit that separates and collects the sucked dust from the suction wind, and the dust collection unit includes: A suction port through which the suction air from the suction tool flows, a coarse dust collecting means for collecting the sucked coarse dust, and a centrifugal separation chamber for centrifuging the dust after passing through the coarse dust collecting means with the suction air. In addition, a vacuum cleaner provided with a bypass passage communicating the suction port and the centrifugal separation chamber without passing through the coarse dust collecting means. A coarse dust storage chamber for storing dust collected by the coarse dust collecting means, a dust transfer path for communicating the suction port and the coarse dust storage chamber, and the dust transfer path is formed in a substantially straight line. The electric vacuum cleaner according to 1. The vacuum cleaner according to claim 1 or 2, wherein the inlet opening of the bypass passage is arranged at or near the suction port. The suction port according to claim 1, wherein the suction port is formed in a substantially cylindrical shape, an opening having a width of a predetermined dimension is provided from an outer periphery of the cylindrical portion, and the opening is an inlet opening portion of the bypass passage. Electric vacuum cleaner. The vacuum cleaner according to claim 3 or 4, wherein the direction of the suction air flowing into the inlet opening is opposite to the direction of the suction air flowing into the suction port. The vacuum cleaner according to any one of claims 3 to 5, wherein a member such as a filter that prevents the flow of dust is not provided at the entrance opening. The vacuum cleaner according to any one of claims 2 to 6, wherein the bottom surface of the dust transfer path is positioned below the lower end of the end portion of the suction port on the coarse dust storage chamber side. The vacuum cleaner according to any one of claims 2 to 7, wherein the bottom surface of the coarse dust chamber is positioned below the bottom surface of the dust transfer path. The electricity according to any one of claims 2 to 8, wherein a partition wall substantially equal to the height of the coarse dust chamber is extended rearward from the end of the dust transfer path on the side where the inlet opening of the bypass passage is formed. Vacuum cleaner. The vacuum cleaner according to claim 9, wherein the end of the partition wall is inclined toward the side wall of the coarse dust chamber. The rear wall of the coarse dust storage chamber is formed by a part or the whole of the coarse dust collecting means, and the portion facing the rear opening of the dust transfer path is made non-ventilated. Electric vacuum cleaner. The vacuum cleaner according to any one of claims 2 to 11, wherein a wall surface protruding toward the coarse dust storage chamber is formed at least at a lower portion of an end portion of the suction port on the coarse dust storage chamber. The coarse dust collecting means is arranged on the upper surface and the rear wall of the coarse dust storage chamber, and at least a portion outside the partition wall of the coarse dust collecting means on the upper surface is made impermeable to air. The vacuum cleaner as described in. The vacuum cleaner according to any one of claims 9 to 13, wherein a dust disposal line is displayed on an outer surface of the coarse dust chamber on the side where the partition wall is formed. 15. The centrifugal separation chamber is provided with an inflow port through which almost or all of the suction air flows, and the inflow port and the partition wall are arranged on opposite sides with respect to the suction port center. A vacuum cleaner according to claim 1.

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