JP6707977B2 - Suction nozzle and vacuum cleaner equipped with the same - Google Patents

Description

The present invention relates to a suction nozzle for sucking air and an electric vacuum cleaner including the suction nozzle.

A conventional vacuum cleaner is disclosed in Patent Document 1. This electric vacuum cleaner includes a casing that opens an air intake port and an air exhaust port, and an air passage that connects the intake port and the exhaust port is formed in the casing. An electric blower for generating an air flow is arranged in the air passage, and a dust collecting unit for collecting dust such as dust flowing in the air passage is arranged upstream of the electric blower. A pair of left and right wheels are attached to both side surfaces of the housing. As a result, the housing can move on the floor surface in the room.

A hose is connected to the intake port of the housing, and a connecting pipe is connected to the upstream end of the hose. The connecting pipe is provided with a handle and an operation switch. The operation switch is operated to turn on/off the electric vacuum cleaner and change the rotation speed of the electric blower. An extension pipe is attached to the upstream end of the connecting pipe. A suction head is detachably attached to the extension pipe at the upstream end of the extension pipe. The suction head has a housing extending in a direction substantially orthogonal to the extending direction of the extension tube.

At the bottom of the housing of the suction head, a suction opening extending in the longitudinal direction of the housing is opened so as to face the floor surface in the room. A generally circular outlet is formed in the upper part of the longitudinal center of the housing of the suction head, the outlet being in communication with the extension pipe. The suction opening extends over both ends in the longitudinal direction of the housing, and the outflow port is formed to be narrower in the longitudinal direction of the housing than the suction opening. A suction chamber that connects the suction opening and the outlet is provided in the housing.

In the electric vacuum cleaner having the above structure, when the electric blower is driven by operating the operation switch, air containing dust such as dust is sucked into the suction chamber from the suction opening of the suction head. The air sucked into the suction head flows through the suction chamber and flows into the extension pipe through the outlet. The air that has flowed into the extension pipe flows into the housing through the hose, and dust in the air is collected by the dust collecting portion inside the housing. As a result, the floor surface is cleaned.

JP, 2015-70960, A

However, according to the suction head (suction nozzle) of the conventional vacuum cleaner described above, the outflow port opens in the central portion in the longitudinal direction of the housing. For this reason, a part of the airflow sucked from both longitudinal ends of the suction opening (suction port) is sharply bent toward the center immediately after flowing into the suction chamber (suction passage), and the longitudinal central portion It joins the airflow sucked from. Therefore, turbulent flow is generated in the suction chamber, and the suction efficiency of the suction head is reduced.

An object of the present invention is to provide a suction nozzle that can improve suction efficiency and an electric vacuum cleaner including the suction nozzle.

An exemplary suction nozzle of the present invention is a suction nozzle provided in an electric vacuum cleaner having an electric blower, and the suction nozzle includes a suction port that extends in a predetermined longitudinal direction facing a surface to be cleaned, and the electric motor. An outlet connected to a blower, a suction passage extending in a centerline direction connecting the longitudinal center of the inlet and the longitudinal center of the outlet, and connecting the inlet and the outlet, A plurality of partition walls provided inside the suction passage and extending from the suction port side to the outflow port side, and the suction passage includes the suction passage at the partition wall in the longitudinal direction of the suction port. The partition has a main passage in which the center line of the suction passage is located, and a plurality of divided passages located on both outer sides in the longitudinal direction with respect to the main passage through the partition wall. said longitudinal width of said main passage, the main passage the widely than the longitudinal width of the said outlet, said partition wall, first curved portion which is curved convexly toward the side away from the center line And a second bending portion which is continuous with the downstream side of the first bending portion and is convexly curved toward the side closer to the center line.

An exemplary electric vacuum cleaner of the present invention includes the suction nozzle having the above-described configuration, a dust collecting section arranged downstream of the suction nozzle, and the electric blower arranged downstream of the dust collecting section.

According to the exemplary embodiments of the present invention, it is possible to provide a suction nozzle that can improve suction efficiency. Further, according to the exemplary present invention, it is possible to provide an electric vacuum cleaner including such a suction nozzle.

FIG. 1 is a perspective view of an electric vacuum cleaner according to a first embodiment of the present invention. FIG. 2 is a bottom view of the electric vacuum cleaner according to the first embodiment of the present invention. FIG. 3 is a side sectional view of the electric vacuum cleaner according to the first embodiment of the present invention. FIG. 4 is a perspective view of the air passage on the suction side including the suction nozzle of the electric vacuum cleaner according to the first embodiment of the present invention. FIG. 5 is a front cross-sectional view of the suction nozzle of the electric vacuum cleaner according to the first embodiment of the present invention. FIG. 6 is a perspective view showing a result of simulating the flow of air in the air passage on the suction side of the electric vacuum cleaner according to the first embodiment of the present invention. FIG. 7: is a side view which shows the result of having simulated the flow of the air in the suction-side air passage of the vacuum cleaner which concerns on 1st Embodiment of this invention. FIG. 8: is a side view which shows the result of the simulation of the wind speed distribution in the air passage of the suction side of the vacuum cleaner which concerns on 1st Embodiment of this invention. FIG. 9: is a side view which shows the result of the simulation of the wind pressure distribution in the air passage of the suction side of the vacuum cleaner which concerns on 1st Embodiment of this invention. FIG. 10 is a perspective view of the suction-side air passage including the suction nozzle of the electric vacuum cleaner according to the second embodiment of the present invention. FIG. 11 is a front cross-sectional view of the suction nozzle of the electric vacuum cleaner according to the second embodiment of the present invention. FIG. 12 is a perspective view of an air passage on a suction side including a suction nozzle of an electric vacuum cleaner according to a third embodiment of the present invention. FIG. 13 is a front cross-sectional view of the suction nozzle of the electric vacuum cleaner according to the third embodiment of the present invention. FIG. 14: is a perspective view of the vacuum cleaner which concerns on 4th Embodiment of this invention. FIG. 15 is a front sectional view of a suction nozzle of an electric vacuum cleaner according to the fourth embodiment of the present invention. FIG. 16 is a side sectional view of a suction nozzle of an electric vacuum cleaner according to the fourth embodiment of the present invention. FIG. 17 is a perspective view of an electric vacuum cleaner according to the fifth embodiment of the present invention. FIG. 18 is a perspective view of an electric vacuum cleaner according to the sixth embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the direction approaching the floor surface F (surface to be cleaned) in FIG. 3 is “downward”, and the direction away from the floor surface F is “upward”. Regarding the front-back direction, the direction from the electric blower 7 to the suction port 4 is “front”, and the direction from the suction port 4 to the electric blower 7 is “rear”. A direction orthogonal to the front-rear direction and parallel to the floor surface F is referred to as a "left-right direction (width direction)". Further, a surface parallel to the front-rear direction and perpendicular to the left-right direction is referred to as a "side surface". Further, “upstream” and “downstream” respectively indicate upstream and downstream in the flow direction of the air sucked from the suction port 4 when the electric blower 7 is driven. Further, "the suction port 4 faces the floor surface F (surface to be cleaned)" means that no other member is arranged between the suction port 4 and the floor surface F and the suction port 4 and the floor surface F In addition to directly facing each other, a state in which another member (for example, a rotating brush or the like) is arranged between the suction port 4 and the floor surface F and faces each other through the other member is included.

<First Embodiment>
(1. Overall structure of vacuum cleaner)
An electric vacuum cleaner according to an exemplary embodiment of the present invention will be described below. 1 to 3 are a perspective view, a bottom view and a side sectional view of the electric vacuum cleaner according to the first embodiment. The electric vacuum cleaner 1 is a so-called robot type electric vacuum cleaner, and has a housing 2 having a substantially circular horizontal cross section (cross section parallel to the floor surface F).

A display unit 15 and an operation unit 16 are provided on the upper surface of the housing 2. The operation unit 16 has a plurality of buttons (not shown). By operating the operation unit 16, it is possible to give an instruction to turn on/off the electric vacuum cleaner 1, an instruction to change the number of rotations of the electric blower 7 described later, and input conditions such as a cleaning start time of the electric vacuum cleaner 1. The display unit 15 has, for example, a liquid crystal display panel or the like, and displays the conditions and the like input by the operation unit 16.

A position sensor (not shown) is provided on the upper surface of the housing 2. The position sensor allows the electric vacuum cleaner 1 to detect the position in the room.

A suction port 4 extending in the left-right direction (longitudinal direction A) is provided on the bottom surface (lower surface) of the housing 2, and an exhaust port 5 extending in the left-right direction is provided at the rear part of the housing 2. The suction port 4 faces the floor surface F (surface to be cleaned) in the room, and the exhaust port 5 faces the upper rear side of the housing 2. A rotating brush (not shown) is provided near the suction port 4 on the bottom of the housing 2. A rotary brush may be arranged in the suction port 4.

An air passage 6 that connects the intake port 4 and the exhaust port 5 is provided inside the housing 2. An electric blower 7 for generating an air flow is arranged in the air passage 6. When the electric blower 7 is driven, the air in the room flows into the air passage 6 from the suction port 4 as shown by an arrow S, and is discharged from the exhaust port 5 toward the room. A centrifugal fan is preferably used as the electric blower 7, but another type of electric blower such as an axial fan may be used.

A dust collector 8 and a filter 9 are sequentially arranged between the suction port 4 in the air passage 6 and the electric blower 7 from the upstream side to the downstream side in the air flow direction. Dust contained in the air flowing through the air passage 6 is blocked by the filter 9 and collected in the dust collecting portion 8 formed in a container shape. The dust collector 8 and the filter 9 are configured to be attachable to and detachable from the housing 2. The downstream side of the filter 9 in the air passage 6 is formed so that the flow passage width (width in the longitudinal direction A) becomes narrower toward the intake hole (not shown) of the electric blower 7.

A nozzle-shaped suction nozzle 20 is detachably attached to the housing 2 upstream of the dust collecting portion 8 in the air passage 6. The suction nozzle 20 has a suction port 4 and an outflow port 22 at the upstream end and the downstream end, respectively, and a suction passage 21 that connects the suction port 4 and the outflow port 22 is formed in the suction nozzle 20. The suction port 4 faces the floor surface F (cleaning surface) and extends in a predetermined longitudinal direction A. The outlet 22 is connected to the electric blower 7. The width of the outflow port 22 in the longitudinal direction A is formed to be substantially the same as the width of the suction port 4 in the longitudinal direction A.

The suction passage 21 extends upward from the suction port 4, bends rearward, and is connected to the upper portion of the dust collecting portion 8 via the outflow port 22. The suction nozzle 20 covers a part of the dust collecting portion 8 from above. That is, the suction passage 21 is formed so as to extend upward from the suction port 4 and is connected to the upper portion of the dust collecting portion 8, and the suction nozzle 20 covers a portion of the dust collecting portion 8 from above. The details of the suction nozzle 20 will be described later.

A pair of left and right drive wheels 19a is provided on the left and right ends of the bottom surface of the housing 2. A driven wheel 19b composed of one free wheel is provided at the front end of the bottom surface of the housing 2. The drive wheel 19a is connected to a drive motor (not shown). Thereby, the housing 2 can move on the floor surface F.

Further, the electric vacuum cleaner 1 has a control unit (not shown) that controls each unit. The electric blower 7, the display unit 15, the operation unit 16, the drive motor, the position sensor, the storage unit, and the like are connected to the control unit. The storage unit stores the control program of the electric vacuum cleaner 1 and also stores the conditions input by the operation unit 16.

A power supply unit 11 having a secondary battery or the like is provided at the front of the housing 2. The power supply unit 11 supplies power to the electric blower 7, the control unit, the drive motor, and the like, and has a housing side contact (not shown) exposed on the bottom surface of the housing 2. The housing side contact contacts a charging stand side contact of a charging stand (not shown) connected to a commercial power source (not shown). As a result, the secondary battery of the power supply unit 11 is charged via the charging stand. The electric vacuum cleaner 1 is placed on the charging stand before the cleaning operation is started.

(2. Structure of suction nozzle)
4 shows a perspective view of the air passage 6 on the suction side including the suction nozzle 20, and FIG. 5 shows a front sectional view of the suction nozzle 20. The suction nozzle 20 includes a suction port 4, an outlet 22, a suction passage 21, and a plurality of partition walls 25. The suction passage 21 extends in the direction of a center line CT that connects the center of the suction port 4 in the longitudinal direction A and the center of the flow outlet 22 in the longitudinal direction A, and connects the suction port 4 and the outlet 22. The upper and lower surfaces of the suction passage 21 are formed by an upper wall 28a and a lower wall 28b, respectively, and the left and right surfaces are formed by side walls 28c and 28d, respectively. The upper wall 28a and the lower wall 28b are inclined so as to be located higher as they go rearward, and the suction passage 21 is inclined to guide the airflow to the outlet 22.

In the suction passage 21, a plurality of (two in this embodiment) partition walls 25 are arranged in parallel in the longitudinal direction A. The plurality of partition walls 25 are provided inside the suction passage 21 and extend from the suction port 4 side to the outflow port 22 side. The partition wall 25 extends from the suction port 4 to the outflow port 22 to partition the suction passage 21 in the longitudinal direction A, and divides the main passage 21a and a plurality of (two in the present embodiment) divided passages 21b and 21c. In the main passage 21a, the suction passage 21 is partitioned by the partition wall 25 in the longitudinal direction A of the suction port 4, and the center line CT of the suction passage 21 is located. The plurality of divided passages 21b and 21c are located on both outer sides in the longitudinal direction A with respect to the main passage 21a via the partition wall 25. That is, the main passage 21a is arranged on the center line CT, and the divided passages 21b and 21c are arranged on both outer sides in the longitudinal direction A with respect to the main passage 21a.

The partition wall 25 divides the suction port 4 into suction ports 4a, 4b, and 4c. The suction ports 4a, 4b, 4c are arranged at the upstream ends of the main passage 21a, the divided passage 21b, and the divided passage 21c, respectively. The suction ports 4b and 4c are close to the suction port 4a.

The partition wall 25 has an upstream vertical portion 25a, a first curved portion 25b, a second curved portion 25c, and a downstream vertical portion 25d in this order from upstream to downstream in the air flow direction. The upstream vertical portion 25a is arranged at the upstream end of the partition wall 25 and is formed substantially perpendicular to the longitudinal direction A. That is, at the upstream end, the partition wall 25 has an upstream vertical portion 25a that is substantially vertical to the longitudinal direction A. The first curved portion 25b is continuously formed on the downstream side of the upstream vertical portion 25a, and is convexly curved on the side away from the centerline CT (outside in the longitudinal direction A). That is, the partition wall 25 has the first curved portion 25b which is continuously curved on the downstream side of the upstream vertical portion 25a and convexly curved on the side away from the center line CT. The second curved portion 25c is continuously formed on the downstream side of the first curved portion 25b, and is convexly curved on the side closer to the center line CT (inner side in the longitudinal direction A). That is, the partition wall 25 has the second curved portion 25c which is continuous to the downstream side of the first curved portion 25b and is convexly curved toward the side closer to the center line CT. The downstream vertical portion 25d is arranged at the downstream end continuous with the second curved portion 25c, and is formed substantially perpendicular to the longitudinal direction A. That is, the partition wall 25 has a downstream side vertical portion 25d that is substantially perpendicular to the longitudinal direction A at the downstream end that is continuous with the second curved portion 25c.

As a result, the partition wall 25 is arranged such that the upstream end thereof is located outside of the downstream end in the longitudinal direction A, and the width W1 of the main passage 21a at the suction port 4a in the longitudinal direction A is the longitudinal direction of the main passage 21a at the outlet 22. It is wider than the width W2 of A. The width W3 of the suction port 4b in the longitudinal direction A is smaller than the width W4 of the divided passage 21b in the outflow port 22 in the longitudinal direction A. A width W5 of the suction port 4c in the longitudinal direction A is narrower than a width W6 of the divided passage 21c in the outflow port 22 in the longitudinal direction A.

The width W3 of the suction port 4b and the width W5 of the suction port 4c are substantially the same, and the width W1 of the suction port 4a is formed wider than the width W3 of the suction port 4b and the width W5 of the suction port 4c. The width W4 of the divided passage 21b and the width W6 of the divided passage 21c at the outlet 22 are substantially the same. Further, since the divided passages 21b and 21c are widened on the downstream side, the width W4 of the divided passage 21b and the width W6 of the divided passage 21c at the outlet 22 are made closer to the width W2 of the main passage 21a. In the present embodiment, the width W2 of the main passage 21a, the width W4 of the divided passage 21b and the width W6 of the divided passage 21c at the outlet 22 are formed to be substantially the same. The width W3 of the suction port 4b and the width W5 of the suction port 4c may be different.

The number of partition walls 25 is not limited to two and may be an even number of four or more. In this case, the suction passage 21 is divided into one main passage and four or more even divided passages.

(3. Vacuum cleaner cleaning operation)
In the electric vacuum cleaner 1 having the above-described configuration, when the cleaning start time stored in advance in the storage unit comes, the housing 2 separates from the charging stand and automatically moves on the floor surface F. At this time, the electric blower 7 is driven and the rotating brush rotates. As a result, the cleaning operation of the electric vacuum cleaner 1 is started. The air flow containing dust on the floor surface F flows into the main passage 21a and the divided passages 21b and 21c through the suction ports 4a, 4b and 4c, respectively, as shown by an arrow S (see FIG. 5).

At this time, since the partition wall 25 has the upstream side vertical portion 25a, turbulent flow near the upstream end of the partition wall 25 is reduced. As a result, the airflow smoothly flows into the main passage 21a and the divided passages 21b and 21c. The air that has flowed into the main passage 21a and the divided passages 21b and 21c flows along the order of the first bending portion 25b and the second bending portion 25c. As a result, the air flowing into the divided passages 21b and 21c is smoothly guided to the centerline CT side. Therefore, the turbulent flow of the air in the divided passages 21b and 21c can be reduced and the air can be circulated smoothly.

Further, since the widths W4 and W6 of the divided passages 21b and 21c at the outflow port 22 are brought close to the width W2 of the main passage 21a, the same suction force acts on the main passage 21a, the divided passages 21b, and the divided passages 21c. Therefore, the suction force of the suction port 4 in the longitudinal direction A can be made substantially uniform.

Further, the width W1 of the suction port 4a of the main passage 21a in which turbulent flow is unlikely to occur is formed wider than the widths W3, W5 of the suction ports 4b, 4c, so that the suction efficiency of the suction nozzle 20 can be further improved.

Further, since the partition wall 25 has the downstream side vertical portion 25d, the air that has reached the downstream portions of the main passage 21a, the divided passages 21b, and the divided passages 21c is smoothly guided to the downstream of the outflow port 22.

The airflow flowing through the main passage 21a and the divided passages 21b and 21c flows into the dust collecting portion 8 through the outlet 22. At this time, the dust D in the air is shielded by the filter 9 and collected in the dust collecting portion 8. The air that has passed through the filter 9 flows through the air passage 6 downstream of the filter 9 and then is sent out of the housing 2 through the exhaust port 5. As a result, the floor surface F is cleaned.

The electric vacuum cleaner 1 moves the entire floor surface F while driving the electric blower 7, and then returns to the charging stand, and the electric blower 7 is stopped. This completes the cleaning operation of the electric vacuum cleaner 1.

(4. Airflow simulation)
6 and 7 are a perspective view and a side view showing the result of simulating the flow of air in the air passage 6 on the suction side. According to these drawings, almost no turbulent flow was observed in the main passage 21a and the divided passages 21b and 21c, and the air circulated in the main passage 21a and the divided passages 21b and 21c in a laminar flow state. In addition, no large turbulence was found in the dust collecting portion 8 to the extent that accumulated dust was re-scattered.

As a comparative example, a similar simulation was performed by omitting the partition wall 25. As a result, a large turbulent flow was observed in both ends of the suction passage 21 in the longitudinal direction A and in the dust collecting portion 8.

(5. Simulation of wind speed distribution)
FIG. 8 is a side view showing the result of simulation of the wind speed distribution in the air passage 6 on the suction side. The wind velocity distribution in the suction passage 21 was approximately 25 m/s and was substantially uniform, and the wind velocity distribution in the dust collecting part 8 was approximately 0.041 m/s and was substantially uniform. On the other hand, in the above-described comparative example, the wind speeds in the suction nozzle 20 and the dust collecting portion 8 were largely uneven.

(6. Simulation of wind pressure distribution)
FIG. 9 is a side view showing a result of simulation of wind pressure distribution in the air passage 6 on the suction side. According to the figure, the air pressure distribution inside the suction nozzle 20 and inside the dust collecting portion 8 was approximately -230 Pa, which was substantially uniform. On the other hand, in the above comparative example, the unevenness of the wind pressure inside the suction nozzle 20 and inside the dust collecting portion 8 was large.

From the above results, according to the suction nozzle 20 of the present embodiment, turbulent flow in the suction passage 21 and the dust collecting portion 8 can be reduced.

According to the present embodiment, the suction nozzle 20 is provided with a plurality of partition walls 25 that partition the suction passage 21 in the longitudinal direction A of the suction port 4 and divide the main passage 21a into the divided passages 21b and 21c. Accordingly, even if the flow path is narrowed on the intake side of the electric blower 7, immediately after the airflow of air sucked from both ends of the suction port 4 in the longitudinal direction A flows into the suction passage 21, the air flows toward the centerline CT side. It is not bent sharply and air turbulence can be reduced.

The width W1 of the main passage 21a in the suction port 4 in the longitudinal direction A is wider than the width W2 of the main passage 21a in the outlet 22 in the longitudinal direction A. Therefore, the widths W4 and W6 of the divided passages 21b and 21c are brought closer to the width W2 of the main passage 21a at the outflow port 22, and the suction force acting on the divided passages 21b and 21c can be increased. Thereby, the suction force of the suction port 4 can be made substantially uniform in the longitudinal direction A. Therefore, the suction efficiency of the suction nozzle 20 can be improved.

Further, at the upstream end of the suction passage 21, the partition wall 25 has an upstream vertical portion 25a that is substantially vertical to the longitudinal direction A. Thereby, the turbulent flow near the upstream end of the partition wall 25 can be further reduced.

Further, the partition wall 25 has a first curved portion 25b which is continuous with the downstream side of the upstream vertical portion 25a and is convexly curved toward the side away from the center line CT. Thereby, the air sucked from the suction ports 4b, 4c at both ends in the longitudinal direction A can be smoothly circulated in the divided passages 21b, 21c.

Further, the partition wall 25 has a second curved portion 25c which is continuous to the downstream side of the first curved portion 25b and which is convexly curved toward the side closer to the center line CT. Thereby, the air sucked from the suction ports 4b, 4c at both ends in the longitudinal direction A can be smoothly guided to the downstream portion of the suction passage 21.

Further, the partition wall 25 has a downstream vertical portion 25d that is substantially vertical to the longitudinal direction A at the downstream end that is continuous with the second curved portion 25c. As a result, the air flowing through the main passage 21a and the divided passages 21b and 21c can be smoothly guided to the outflow port 22.

Further, the width W1 of the main passage 21a in the suction port 4 in the longitudinal direction A is wider than the widths W3, W5 of the divided passages 21b, 21c in the suction port 4 in the longitudinal direction A. By thus forming the three suction ports and dividing and sucking, the turbulent entry in the suction nozzle 20 is less likely to occur, and the suction amount of the suction nozzle 20 can be increased. Further, by forming the narrow divided channels 21b and 21c outside the suction port 4 in the longitudinal direction A, the suction efficiency at the end of the suction nozzle 20 in the longitudinal direction A where the suction force tends to be weakest is further improved. Can be made

Further, the electric vacuum cleaner 1 includes a suction nozzle 20, a dust collecting unit 8 arranged downstream of the suction nozzle 20, and an electric blower 7 arranged downstream of the dust collecting unit 8. Thereby, the electric vacuum cleaner 1 having improved suction efficiency and cleaning efficiency can be easily realized. Further, since the air flows in the main passage 21a and the divided passages 21b and 21c in a laminar flow state, the dust D is also discharged from the suction ports 4b and 4c at both ends in the longitudinal direction A without increasing the rotation speed of the electric blower 7. Can be sucked in smoothly. Therefore, it is possible to reduce the turbulent flow in the dust collecting portion 8 and prevent the dust D accumulated in the dust collecting portion 8 from re-scattering.

Further, the suction passage 21 is formed to extend upward from the suction port 4 and is connected to the upper portion of the dust collecting portion 8, and the suction nozzle 20 covers a portion of the dust collecting portion 8 above the dust collecting portion 8. Thereby, the vacuum cleaner 1 can be made compact.

In the present embodiment, the second curved portion 25c and the downstream vertical portion 25d may be omitted, and the first curved portion 25b may be formed from the downstream end of the upstream vertical portion 25a to the outlet 22.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. FIG. 10 is a perspective view of the air passage on the suction side including the suction nozzle of the electric vacuum cleaner according to the second embodiment. FIG. 11 is a front sectional view of a suction nozzle of the electric vacuum cleaner according to the second embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. In the second embodiment, the shape of the partition wall 25 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

In the suction passage 21, a plurality of flat partition walls 25 are arranged in parallel in the longitudinal direction A. The partition wall 25 is arranged in a straight line from the suction port 4 side to the outflow port 22 side, and is formed by a flat plate perpendicular to the lower wall 28b. That is, the partition wall 25 has a flat plate shape and is arranged in a straight line from the suction port 4 side to the outflow port 22 side. When viewed from the front, the two partition walls 25 are arranged so as to incline so that they approach each other from the suction port 4 toward the outflow port 22.

According to this embodiment, the same effect as that of the first embodiment can be obtained. The partition wall 25 has a flat plate shape and is arranged in a straight line from the suction port 4 side to the outflow port 22 side. As a result, it is possible to easily prevent separation of the airflow flowing through the main passage 21a and the divided passages 21b and 21c from the partition wall 25, and further reduce the occurrence of turbulence.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 12 is a perspective view of the air passage on the suction side including the suction nozzle of the electric vacuum cleaner according to the third embodiment. FIG. 13 is a front sectional view of a suction nozzle of the electric vacuum cleaner according to the third embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. In the third embodiment, the shape of the partition wall 25 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

The partition wall 25 has an upstream vertical portion 25a, a straight portion 25e, and a downstream vertical portion 25d in this order from upstream to downstream in the air flow direction. Note that, unlike the second embodiment, in the third embodiment, the partition wall 25 has a downstream side vertical portion 25d that is substantially perpendicular to the longitudinal direction A at the downstream end. Thereby, the air that has reached the downstream portions of the main passage 21a, the divided passages 21b, and the divided passages 21c is smoothly guided to the downstream of the outflow port 22. The straight line portion 25e is continuously formed at the downstream end of the upstream side vertical portion 25a and the upstream end of the downstream side vertical portion 25d, respectively, and is formed in a straight line.

In this embodiment, the same effect as that of the first embodiment can be obtained. In the present embodiment, the upstream vertical portion 25a or the downstream vertical portion 25d may be omitted.

<Fourth Embodiment>
Next, a fourth embodiment of the present invention will be described. FIG. 14: is a perspective view of the vacuum cleaner of 4th Embodiment. 15 and 16 are a front sectional view and a side sectional view of a suction nozzle of an electric vacuum cleaner according to the fourth embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. The fourth embodiment differs from the first embodiment in that a so-called canister-type vacuum cleaner 30 is used instead of the robot-type vacuum cleaner 1. Other parts are the same as those in the first embodiment.

The vacuum cleaner 30 has an air intake port 31 and an air exhaust port 5 on the front surface and the back surface of the housing 2, respectively. An air passage 6 that connects the intake port 31 and the exhaust port 5 is formed in the housing 2. A dust collector 8, a filter 9, and an electric blower 7 are sequentially arranged in the air passage 6 from the upstream side to the downstream side. A pair of left and right wheels 39 is attached to the side surface of the housing 2. Further, the electric vacuum cleaner 30 is provided with a power cord (not shown) connectable to a commercial power source (not shown).

A hose 32 is connected to the intake port 31 of the housing 2, and a connecting pipe 34 is connected to the upstream end of the hose 32. The connecting pipe 34 is provided with a grip portion 35 and an operating portion 16. The operation of the operation unit 16 gives instructions for turning on/off the electric vacuum cleaner 30, changing the rotation speed of the electric blower 7, and the like. The extension pipe 33 is attached to the upstream end of the connecting pipe 34. The suction nozzle 20 is detachably attached to the extension pipe 33 at the upstream end of the extension pipe 33.

The suction nozzle 20 has a joint pipe 27 connected to the extension pipe 33 at the rear portion of the housing 26, and an outlet 22 is opened at the downstream end of the joint pipe 27. The width W7 of the outflow port 22 in the longitudinal direction A is narrower than the width W8 of the suction port 4 in the longitudinal direction A. The width of the opening 29 at the upstream end of the joint pipe 27 in the longitudinal direction A is formed to be substantially the same as the width W7 of the outlet 22. The downstream end of the partition wall 25 is arranged within the width W7 of the outlet 22 in the longitudinal direction A.

In the electric vacuum cleaner 30 having the above structure, when the user inserts the plug of the power cord into the outlet (not shown) and operates the operation unit 16, the electric blower 7 is driven. As a result, the air containing the dust D flows from the suction port 4 of the suction nozzle 20 into the main passage 21a and the divided passages 21b and 21c. At this time, since the downstream end of the partition wall 25 is arranged within the width W7 of the outlet 22 in the longitudinal direction A, the air flowing through the main passage 21a and the divided passages 21b, 21c is smoothly guided to the outlet 22. ..

The air flowing through the main passage 21a and the divided passages 21b and 21c flows through the extension pipe 33, the connecting pipe 34 and the hose 32 in this order, and then flows into the housing 2 through the intake port 31. The dust D in the air that has flowed into the housing 2 is collected by the dust collector 8. Thereby, the floor surface F can be cleaned.

In this embodiment, the same effect as that of the first embodiment can be obtained. Further, the canister-type vacuum cleaner 30 can also improve the suction efficiency and the cleaning efficiency.

<Fifth Embodiment>
Next, a fifth embodiment of the present invention will be described. FIG. 17 is a perspective view of the electric vacuum cleaner according to the fifth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 9 are given the same reference numerals. The fifth embodiment differs from the first embodiment in that a so-called stick-type vacuum cleaner 40 is used instead of the robot-type vacuum cleaner 1. Other parts are the same as those in the first embodiment.

The electric vacuum cleaner 40 is provided with a housing 2 having an air inlet 41 and an air outlet 5 respectively opened on the lower surface and the upper surface. An air passage 6 that connects the intake port 41 and the exhaust port 5 is formed in the housing 2. A dust collector 8, a filter 9, and an electric blower 7 are sequentially arranged in the air passage 6 from the upstream side to the downstream side. Further, the electric vacuum cleaner 40 is provided with a power cord (not shown) similar to that of the fourth embodiment.

A grip portion 35 and an operation portion 16 are provided on the top of the housing 2. A rod-shaped suction tube 47 is connected to the intake port 41 of the housing 2. The suction nozzle 20 is detachably attached to the suction pipe 47 at the upstream end of the suction pipe 47. The structure of the suction nozzle 20 of this embodiment is the same as that of the suction nozzle 20 of the fourth embodiment.

In this embodiment, the same effect as that of the first embodiment can be obtained. Further, the stick-type vacuum cleaner 40 can also improve the suction efficiency and the cleaning efficiency.

<Sixth Embodiment>
Next, a sixth embodiment of the present invention will be described. FIG. 18 is a perspective view of the electric vacuum cleaner according to the sixth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 9 are given the same reference numerals. The sixth embodiment is different from the first embodiment in that a so-called handy vacuum cleaner 50 is used instead of the robot vacuum cleaner 1. Other parts are the same as those in the first embodiment.

The structure of the electric vacuum cleaner 50 is the same as the structure of the electric vacuum cleaner 40 of the fifth embodiment except that the suction tube 47 is omitted. The user can hold the grip portion 35 and clean the floor surface F, the desk (surface to be cleaned), or the like with the electric vacuum cleaner 50.

In this embodiment, the same effect as that of the first embodiment can be obtained. In addition, the handheld vacuum cleaner 50 can also improve suction efficiency and cleaning efficiency.

In addition, in the suction nozzle 20 of 4th Embodiment-6th Embodiment, it replaces with the partition wall 25 of 1st Embodiment, and provides the same partition wall as the partition wall 25 of 2nd Embodiment and 3rd Embodiment. Good.

Further, in the suction nozzle 20 of the fourth to sixth embodiments, a rotary brush may be provided inside the suction port 4.

According to the present invention, it can be used for a suction nozzle and a vacuum cleaner equipped with the suction nozzle.

1... vacuum cleaner, 2... housing, 4... suction port, 4a... suction port, 4b... suction port, 4c... suction port, 5... exhaust port, 6... Air passage, 7... Electric blower, 8... Dust collection part, 9... Filter, 11... Power supply part, 15... Display part, 16... Operation part, 19a...driving wheel, 19b...driven wheel, 20...suction nozzle, 21...suction passage, 21a...main passage, 21b...divided passage, 21c...divided passage, 25 ... Partition wall, 25a... Upstream vertical portion, 25b... First curved portion, 25c... Second curved portion, 25d... Downstream vertical portion, 25e... Straight portion, 26 ... Housing, 27... Joint pipe, 28a... Upper wall, 28b... Lower wall, 28c... Side wall, 28d... Side wall, 29... Opening portion, 30... Electricity Vacuum cleaner, 31... Intake port, 32... Hose, 33... Extension pipe, 34... Connection pipe, 35... Grip, 39... Wheels, 40... Vacuum cleaner , 41... Intake port, 47... Suction tube, 50... Vacuum cleaner, A... Longitudinal direction, D... Dust, F... Floor surface (cleaning surface), CT... ..Center line, S...arrow, W1...width, W2...width, W3...width, W4...width, W5...width, W6...width, W7...・Width, W8...Width

Claims (9)

A suction nozzle provided in an electric vacuum cleaner having an electric blower,
The suction nozzle is
A suction port facing the surface to be cleaned and extending in a predetermined longitudinal direction,
An outlet connected to the electric blower,
A suction passage extending in a central line direction connecting the longitudinal center of the suction port and the longitudinal center of the outflow port to connect the suction port and the outflow port;
A plurality of partition walls provided inside the suction passage and extending from the suction port side to the outflow port side;
Equipped with
The suction passage is
A main passage in which the suction passage is partitioned by the partition wall in the longitudinal direction of the suction port, and the center line of the suction passage is located;
A plurality of divided passages located on both outer sides in the longitudinal direction with respect to the main passage through the partition wall,
Have
Said longitudinal width of said main passage in said suction port, widely than the longitudinal width of said main passage in said outlet,
The partition wall is
A first bending portion that is convexly curved toward the side away from the center line;
A second bending portion that is continuously curved downstream of the first bending portion and is convexly curved toward the side closer to the center line;
Suction nozzle, characterized in that it comprises a. The suction nozzle according to claim 1, wherein at the upstream end, the partition wall has an upstream side vertical portion that is substantially vertical to the longitudinal direction. The suction nozzle according to claim 2, wherein the first curved portion is continuously arranged on the downstream side of the upstream vertical portion. The suction nozzle according to any one of claims 1 to 3, wherein the partition wall has a downstream vertical portion that is substantially vertical to the longitudinal direction at a downstream end. The suction nozzle according to claim 4, wherein the downstream vertical portion is arranged at a downstream end that is continuous with the second curved portion. The longitudinal width of the outflow port is narrower than the longitudinal width of the suction port,
The suction nozzle according to any one of claims 1 to 5 , wherein a downstream end of the partition wall is arranged within a width of the outflow port in the longitudinal direction. The suction nozzle according to any one of claims 1 to 6 , wherein the longitudinal width of the main passage in the suction port is wider than the longitudinal width of the divided passage in the suction port. A suction nozzle according to any one of claims 1 to 7, a dust collecting portion arranged downstream of the suction nozzle, and the electric blower arranged downstream of the dust collecting portion. A characteristic vacuum cleaner. Claim 8 wherein the suction passage is connected to the upper portion of the dust collecting unit together are formed to extend upwardly from the suction port, wherein the upper portion of the dust collecting part is covered by the suction nozzle Vacuum cleaner as described in.