CN107348900B

CN107348900B - Suction nozzle and dust collector with same

Info

Publication number: CN107348900B
Application number: CN201710323514.4A
Authority: CN
Inventors: 刘俊贤; 市崎博之; 李柏毅
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2016-05-10
Filing date: 2017-05-09
Publication date: 2020-04-28
Anticipated expiration: 2037-05-09
Also published as: CN207444897U; JP6707977B2; US20170325645A1; CN107348900A; EP3243416A1; JP2017202050A; TWI667984B; TW201739402A

Abstract

The invention provides a suction nozzle and a dust collector with the same. The suction nozzle is provided in a vacuum cleaner including an electric blower, and includes a suction port extending in a predetermined longitudinal direction so as to face a surface to be cleaned, an outflow port connected to the electric blower, a suction passage extending in a center line direction connecting a longitudinal center of the suction port and a longitudinal center of the outflow port and connecting the suction port and the outflow port, and a plurality of partition plates provided inside the suction passage and extending from a side of the suction port to an outlet side of the outflow port. The suction path includes: a main passage which divides the suction passage in the longitudinal direction of the suction port by a partition plate, and the center line of the suction passage is positioned on the main passage; and a plurality of divided passages located at both outer sides in the longitudinal direction of the main passage with a partition interposed therebetween. The width of the main passage in the longitudinal direction of the suction port is wider than the width of the main passage in the longitudinal direction of the discharge port.

Description

Suction nozzle and dust collector with same

Technical Field

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

Background

A conventional vacuum cleaner is disclosed in Japanese laid-open publication No. 2015-70960. The vacuum cleaner includes a frame body having an air inlet and an air outlet, and an air passage is formed in the frame body to connect the air inlet and the air outlet. An electric blower for generating an air flow is disposed in the air passage, and a dust collecting unit for collecting dust and other debris flowing through the air passage is disposed upstream of the electric blower. A pair of left and right wheels are mounted on both side surfaces of the frame body. Thus, the housing can move on the floor in the room.

A hose (hose) is connected to the air inlet 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 on/off of the cleaner and the number of rotations of the electric blower are changed by the operation of the operation switch. An extension pipe is attached to the upstream end of the connecting pipe. A suction head (suction head) is detachably mounted to the extension pipe at an upstream end of the extension pipe. The suction head includes a housing (housing) extending in a direction substantially orthogonal to the extending direction of the extension pipe.

The bottom of the housing of the suction head is provided with a suction opening extending in the longitudinal direction of the housing so as to face the floor surface in the room. An approximately circular outflow port communicating with the extension pipe is opened at an upper portion of a longitudinal direction central portion of the housing of the suction head. The suction opening extends across both longitudinal ends of the casing, and the outlet is formed narrower than the suction opening in the longitudinal direction of the casing. A suction chamber is provided in the housing to connect the suction opening and the outlet.

In the vacuum cleaner having the above configuration, when the electric blower is driven by operating the operation switch, air containing dust and other debris 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 port. The air flowing into the extension pipe flows into the frame body through the hose, and the garbage in the air is collected through the dust collecting part in the frame body. Thereby, the floor is cleaned.

However, according to the suction head (suction nozzle) of the conventional vacuum cleaner, the outlet is opened at the center in the longitudinal direction of the casing. Therefore, a part of the air flow sucked from both ends in the longitudinal direction of the suction opening (suction port) is sharply bent toward the center side immediately after flowing into the suction chamber (suction passage), and merges with the air flow sucked from the center in the longitudinal direction. Therefore, turbulence (turbulence) is generated in the suction chamber, and the suction efficiency of the suction head is lowered.

Disclosure of Invention

The invention aims to provide a suction nozzle capable of improving suction efficiency and a dust collector with the same.

An exemplary 1 st aspect of the present invention is a suction nozzle provided in a vacuum cleaner including an electric blower, the suction nozzle including a suction port extending in a predetermined longitudinal direction so as to face a surface to be cleaned, an outflow port connected to the electric blower, a suction passage extending in a center line direction connecting a center of the longitudinal direction of the suction port and a center of the longitudinal direction of the outflow port and connecting the suction port and the outflow port, and a plurality of partition plates provided inside the suction passage and extending from the suction port side to the outflow port side, the suction passage including: a main passage that divides the suction passage in the longitudinal direction of the suction port by the partition plate, the center line of the suction passage being located on the main passage; and a plurality of divided passages located on both outer sides in the longitudinal direction than the main passage with the partition plate interposed therebetween; the suction nozzle is characterized in that: the width in the longitudinal direction of the main passage of the suction port is wider than the width in the longitudinal direction of the main passage of the discharge port.

According to exemplary aspect 1 of the present invention, a suction nozzle capable of improving suction efficiency can be provided.

An exemplary 2 nd invention of the present invention is a vacuum cleaner, comprising: the suction nozzle according to claim 1; a dust collection section disposed downstream of the suction nozzle; and the electric blower is arranged at the downstream of the dust collecting part.

According to exemplary 2 nd aspect of the present invention, there may be provided a vacuum cleaner including the suction nozzle as described above.

The above and other features, elements, steps, features and advantages of the present invention will be more clearly understood from the following detailed description of the preferred embodiments of the present invention taken in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a perspective view of a vacuum cleaner according to embodiment 1 of the present invention.

Fig. 2 is a bottom view of the vacuum cleaner of embodiment 1 of the present invention.

Fig. 3 is a side sectional view of a vacuum cleaner according to embodiment 1 of the present invention.

Fig. 4 is a perspective view of an air passage on the suction side of a suction nozzle of a vacuum cleaner including embodiment 1 of the present invention.

Fig. 5 is a front sectional view of a suction nozzle of a vacuum cleaner according to embodiment 1 of the present invention.

Fig. 6 is a perspective view showing a result of simulation of the flow of air in the air passage on the suction side of the vacuum cleaner according to embodiment 1 of the present invention.

Fig. 7 is a side view showing a result of simulation of the flow of air in the air passage on the suction side of the vacuum cleaner according to embodiment 1 of the present invention.

Fig. 8 is a side view showing a result of simulation of a wind speed distribution in an air passage on the suction side of the vacuum cleaner according to embodiment 1 of the present invention.

Fig. 9 is a side view showing a result of simulation of a wind pressure distribution in an air passage on the suction side of the vacuum cleaner according to embodiment 1 of the present invention.

Fig. 10 is a perspective view of an air passage on the suction side of a suction nozzle of a vacuum cleaner including embodiment 2 of the present invention.

Fig. 11 is a front sectional view of a suction nozzle of a vacuum cleaner according to embodiment 2 of the present invention.

Fig. 12 is a perspective view of an air passage on the suction side of a suction nozzle of a vacuum cleaner including embodiment 3 of the present invention.

Fig. 13 is a front sectional view of a suction nozzle of a vacuum cleaner according to embodiment 3 of the present invention.

Fig. 14 is a perspective view of a vacuum cleaner according to embodiment 4 of the present invention.

Fig. 15 is a front sectional view of a suction nozzle of a vacuum cleaner according to embodiment 4 of the present invention.

Fig. 16 is a side sectional view of a suction nozzle of a vacuum cleaner according to embodiment 4 of the present invention.

Fig. 17 is a perspective view of a vacuum cleaner according to embodiment 5 of the present invention.

Fig. 18 is a perspective view of a vacuum cleaner according to embodiment 6 of the present invention.

[ description of symbols ]

1: vacuum cleaner (robot type cleaner)

2: frame body

4. 4a to 4 c: suction inlet

5: exhaust port

6: air passage

7: electric blower

8: dust collecting part

9: filter

11: power supply unit

15: display unit

16: operation part

19 a: driving wheel

19 b: driven wheel

20: suction nozzle

21: suction pathway

21 a: main path

21b, 21 c: dividing a via

22: outflow opening

25: partition board

25 a: upstream side vertical part

25 b: 1 st bent part

25 c: 2 nd bending part

25 d: downstream vertical part

25 e: straight line part

26: shell body

27: joint pipe

28 a: upper wall

28 b: lower wall

28c, 28 d: side wall

29: opening part

30: vacuum cleaner (horizontal vacuum cleaner)

31. 41: air suction inlet

32: flexible pipe

33: extension pipe

34: connecting pipe

35: gripping part

39: wheel of vehicle

40: vacuum cleaner (rod type dust collector)

47: suction tube

50: vacuum cleaner (hand-held cleaner)

A: length direction of the film

CT: center line

D: dust

F: ground (face to be cleaned)

S: arrow head

W1-W8: width of

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present description, the direction toward the floor surface F (surface to be cleaned) in fig. 3 is referred to as "lower", and the direction away from the floor surface F is referred to as "upper". In the front-rear direction, the direction from electric blower 7 to suction port 4 is referred to as "front", and the direction from suction port 4 to electric blower 7 is referred to as "rear". The direction perpendicular to the front-rear direction and parallel to the floor surface F is referred to as the "left-right direction (longitudinal direction)". A surface parallel to the front-rear direction and perpendicular to the left-right direction is referred to as a "side surface". "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. The phrase "the suction port 4 faces the floor surface F (surface to be cleaned)" includes a state in which no other member is disposed between the suction port 4 and the floor surface F and the suction port 4 and the floor surface F directly face each other, and a state in which another member (for example, a rotary brush or the like) is disposed between the suction port 4 and the floor surface F and faces each other with the other member interposed therebetween.

< embodiment 1 >

(1. integral construction of vacuum cleaner)

Hereinafter, a vacuum cleaner 1 according to an exemplary embodiment of the present invention will be described. Fig. 1 to 3 show a perspective view, a bottom view, and a side sectional view of a vacuum cleaner 1 according to embodiment 1. The vacuum cleaner 1 is a so-called robot-type vacuum cleaner, and includes a housing 2 having a substantially circular horizontal cross-section (a 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 includes a plurality of buttons (not shown). The operation of the operation unit 16 can be used to instruct the cleaner 1 to turn on or off (on-off), to instruct the electric blower 7 to change the rotation number, to be described later, and to input conditions such as a cleaning start timing of the cleaner 1. The display unit 15 includes, for example, a liquid crystal display panel, and displays conditions input through the operation unit 16.

A position sensor (not shown) is provided on the upper surface of the housing 2. The cleaner 1 can detect the position in the room by the position sensor.

A suction port 4 extending in the left-right direction (longitudinal direction a) is provided in the bottom surface (lower surface) of the housing 2, and an exhaust port 5 extending in the left-right direction is provided in the rear portion 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 rear upper side of the housing 2. A rotary brush (not shown) is provided near the suction port 4 at the bottom of the housing 2. The rotary brush may be disposed in the suction port 4.

An air passage 6 connecting the suction port 4 and the exhaust port 5 is provided inside the housing 2. An electric blower 7 for generating an air flow is disposed in the air passage 6. By driving the electric blower 7, the air in the room flows into the air passage 6 from the intake port 4 as indicated by the arrow S, and is discharged into the room from the exhaust port 5. As the electric blower 7, a centrifugal fan (centrifugal fan) is preferably used, but other types of electric blowers (electric blowers) such as an axial flow fan may be used.

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

A nozzle-shaped suction nozzle 20 is detachably provided in the air passage 6 upstream of the dust collecting section 8 with respect to the housing 2. The suction nozzle 20 has a suction port 4 and an outflow port 22 at an upstream end and a downstream end, respectively, and a suction passage 21 connecting the suction port 4 and the outflow port 22 is formed in the suction nozzle 20. The suction port 4 extends in a predetermined longitudinal direction a so as to face the floor surface F (surface to be cleaned). The outflow port 22 is connected to the electric blower 7. The width of the outlet 22 in the longitudinal direction a is formed substantially the same as the width of the inlet 4 in the longitudinal direction a.

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

A pair of left and right driving wheels 19a are provided at left and right ends of the bottom surface of the housing 2. A driven wheel 19b including one universal wheel is provided at the front end of the bottom surface of the housing 2. The drive wheel 19a is coupled to a drive motor (not shown). This allows the frame 2 to move on the floor surface F.

The cleaner 1 includes a control unit (not shown) for controlling each unit. The control unit is connected to the electric blower 7, the display unit 15, the operation unit 16, the drive motor, the position sensor, the storage unit, and the like. The storage unit stores a control program for the vacuum cleaner 1, and also stores conditions and the like input through the operation unit 16.

A power supply unit 11 including a secondary battery and the like is provided in a front portion 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 to the bottom surface of the housing 2. The housing-side contact is in contact with a charging-stand-side contact of a charging stand (not shown) connected to a commercial power supply (not shown). Thereby, the secondary battery of the power supply unit 11 is charged via the charging station. Further, the cleaner 1 is disposed on the charging stand before the cleaning operation is started.

(2. construction of suction nozzle)

Fig. 4 is a perspective view of the air passage 6 including the suction side of the suction nozzle 20, and fig. 5 is a front sectional view of the suction nozzle 20. The suction nozzle 20 includes a suction port 4, an outflow port 22, a suction passage 21, and a plurality of partition plates 25. The suction passage 21 extends in the direction of a center line CT connecting the center of the suction port 4 in the longitudinal direction a and the center of the outlet port 22 in the longitudinal direction a, and connects the suction port 4 and the outlet port 22. The upper and lower surfaces of the suction passage 21 are formed by an upper wall 28a and a lower wall 28b, 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 upward toward the rear, and the suction passage 21 is inclined to guide the airflow to the outflow port 22.

A plurality of (two in the present embodiment) partition plates 25 are provided in parallel in the longitudinal direction a in the suction passage 21. The plurality of partitions 25 are provided inside the suction passage 21 and extend from the suction port 4 side to the discharge port 22 side. The partition plate 25 extends from the suction port 4 to the discharge port 22 to partition the suction passage 21 in the longitudinal direction a, and is divided into a main passage 21a, and a plurality of (two in the present embodiment) divided

passages

21b and 21 c. The main passage 21a is partitioned by a partition plate 25 in the longitudinal direction a of the suction port 4 by the suction passage 21, and a center line CT of the suction passage 21 is positioned on the main passage 21 a. The plurality of divided

passages

21b and 21c are located at both outer sides in the longitudinal direction a than the main passage 21a via the partition plate 25. That is, the main passage 21a is disposed on the center line CT, and the divided

passages

21b and 21c are disposed on both outer sides in the longitudinal direction a with respect to the main passage 21 a.

The suction port 4 is divided into a suction port 4a, a suction port 4b, and a suction port 4c by a partition plate 25. The suction port 4a, the suction port 4b, and the suction port 4c are disposed 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 4 a.

The partition plate 25 includes an upstream vertical portion 25a, a 1 st bent portion 25b, a 2 nd bent 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 disposed at the upstream end of the partition plate 25 and is formed substantially perpendicular to the longitudinal direction a. That is, at the upstream end, the partition plate 25 includes an upstream-side vertical portion 25a substantially perpendicular to the longitudinal direction a. The 1 st bent portion 25b is formed continuously with the downstream side of the upstream vertical portion 25a, and is convexly bent toward the side (the outer side in the longitudinal direction a) away from the center line CT. That is, the partition plate 25 includes the 1 st bent portion 25b continuous with the downstream side of the upstream side vertical portion 25a and convexly bent toward the side away from the center line CT. The 2 nd bend 25c is formed continuously with the downstream side of the 1 st bend 25b and is convexly bent toward the side close to the center line CT (the inside in the longitudinal direction a). That is, the separator 25 includes the 2 nd bend portion 25c which is continuous with the downstream side of the 1 st bend portion 25b and is convexly bent toward the side close to the center line CT. The downstream vertical portion 25d is disposed at a downstream end continuous to the 2 nd bent portion 25c and is formed substantially perpendicular to the longitudinal direction a. That is, the partition plate 25 has a downstream side vertical portion 25d substantially perpendicular to the longitudinal direction a at a downstream end continuing to the 2 nd bent portion 25 c.

Thus, the partition plate 25 has the upstream end arranged outside the downstream end in the longitudinal direction a, and the width W1 in the longitudinal direction a of the main passage 21a of the suction port 4a is wider than the width W2 in the longitudinal direction a of the main passage 21a of the discharge port 22. The width W3 in the longitudinal direction a of the suction port 4b is narrower than the width W4 in the longitudinal direction a of the divided passage 21b of the outflow port 22. The width W5 in the longitudinal direction a of the suction port 4c is narrower than the width W6 in the longitudinal direction a of the divided passage 21c of the outflow port 22.

The width W3 of the suction port 4b is substantially the same as the width W5 of the suction port 4c, 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 4 c. The width W4 of the divided passage 21b at the outlet 22 is substantially the same as the width W6 of the divided passage 21 c. Since the divided

passages

21b and 21c are wider on the downstream side, the width W4 of the divided passage 21b and the width W6 of the divided passage 21c at the outflow port 22 are close to the width W2 of the main passage 21 a. 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 substantially the same. The width W3 of the suction port 4b may be different from the width W5 of the suction port 4 c.

The number of the separators 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 divided passages in an even number.

(3. cleaning action of vacuum cleaner)

In the vacuum cleaner 1 having the above-described configuration, when the cleaning start time stored in the storage unit in advance is reached, the housing 2 is separated from the charging stand and automatically moves on the floor surface F. At this time, the electric blower 7 is driven to rotate the rotary brush. This starts the cleaning operation of the cleaner 1. The airflow containing dust on the floor surface F flows into the main passage 21a, the divided passage 21b, and the divided passage 21c through the suction port 4a, the suction port 4b, and the suction port 4c, respectively, as indicated by an arrow S (see fig. 5).

At this time, since the partition plate 25 includes the upstream vertical portion 25a, turbulence in the vicinity of the upstream end of the partition plate 25 is reduced. This allows the airflow to smoothly flow into the main passage 21a, the divided passages 21b, and the divided passages 21 c. The air flowing into the main passage 21a, the divided passage 21b, and the divided passage 21c flows through the 1 st bent portion 25b and the 2 nd bent portion 25c in this order. This smoothly guides the air flowing into the divided

passages

21b and 21c to the center line CT. Therefore, the turbulence of the air in the divided

passages

21b and 21c can be reduced, and the air can be smoothly circulated.

Since the width W4 of the divided passage 21b and the width W6 of the divided passage 21c at the outflow port 22 are close to the width W2 of the main passage 21a, equal suction forces act on the main passage 21a, the divided passage 21b, and the divided passage 21 c. Therefore, the suction force in the longitudinal direction a of the suction port 4 can be made substantially uniform.

Further, the width W1 of the suction port 4a of the main passage 21a in which turbulence is not easily generated can be formed wider than the width W3 of the suction port 4b and the width W5 of the suction port 4c, thereby further improving the suction efficiency of the suction nozzle 20.

Further, since the partition plate 25 includes the downstream side vertical portion 25d, the air reaching 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 outlet port 22.

The airflow flowing through the main passage 21a, the divided passage 21b, and the divided passage 21c flows into the dust collecting part 8 through the outlet 22. At this time, the dust D in the air is blocked by the filter 9 and collected in the dust collecting part 8. The air having passed through the filter 9 flows through the air passage 6 downstream of the filter 9 and is then discharged to the outside of the housing 2 through the exhaust port 5. Thereby, the floor surface F is cleaned.

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

(4. simulation of airflow)

Fig. 6 and 7 are a perspective view and a side view showing the result of simulation (simulation) of the flow of air in the air passage 6 on the suction side. According to these figures, turbulence is hardly seen in the main passage 21a, the divided passages 21b, and the divided passages 21c, and air flows in a laminar state in the main passage 21a, the divided passages 21b, and the divided passages 21 c. Further, turbulence is not seen so much that the dust accumulated in the dust collecting section 8 is scattered again.

As a comparative example, a simulation was similarly performed without the partition plate 25, and as a result, large turbulence was observed in both ends in the longitudinal direction a in the suction passage 21 and in the dust collecting part 8.

(5. simulation of wind velocity distribution)

Fig. 8 is a side view showing a result of simulation of the wind speed distribution in the air passage 6 on the suction side. The wind speed distribution in the suction passage 21 is approximately uniform at approximately 25m/s, and the wind speed distribution in the dust collecting part 8 is approximately uniform at approximately 0.041 m/s. In contrast, in the comparative example, the variation in the wind speed in the suction nozzle 20 and the dust collecting part 8 is large.

(6. simulation of wind pressure distribution)

Fig. 9 is a side view showing the result of simulation of the wind pressure distribution in the air passage 6 on the suction side. According to the above FIG. 9, the distribution of the wind pressure in the suction nozzle 20 and the dust collecting part 8 is approximately-230 Pa and is approximately uniform. In contrast, in the comparative example, the variation in the air pressure in the suction nozzle 20 and the dust collecting part 8 is large.

As a result, the suction nozzle 20 of the present embodiment can reduce turbulence in the suction passage 21 and the dust collecting part 8.

According to the present embodiment, the suction nozzle 20 is provided with a plurality of partitions 25 that divide the suction passage 21 into the main passage 21a, the divided passage 21b, and the divided passage 21c by partitioning the suction passage 21 in the longitudinal direction a of the suction port 4. Accordingly, even if the air intake side flow path of the electric blower 7 is narrowed, the air flow of the air sucked from both end portions in the longitudinal direction a of the suction port 4 cannot be sharply bent toward the center line CT side immediately after flowing into the suction passage 21, and the turbulence of the air can be reduced.

The width W1 in the longitudinal direction a of the main passage 21a of the suction port 4 is wider than the width W2 in the longitudinal direction a of the main passage 21a of the discharge port 22. Therefore, the width W4 of the divided passage 21b and the width W6 of the divided passage 21c are close to the width W2 of the main passage 21a of the outflow port 22, and the suction force acting on the divided passage 21b and the divided passage 21c can be increased. This makes it possible to make the suction force of the suction port 4 substantially uniform in the entire longitudinal direction a. Therefore, the suction efficiency of the suction nozzle 20 can be improved.

At the upstream end of the suction passage 21, the partition plate 25 has an upstream vertical portion 25a substantially perpendicular to the longitudinal direction a. This can further reduce turbulence in the vicinity of the upstream end of the partition 25.

The partition plate 25 includes a 1 st curved portion 25b which is continuous with the downstream side of the upstream vertical portion 25a and is curved convexly toward the side away from the center line CT. This allows air sucked from the

suction ports

4b and 4c at both ends in the longitudinal direction a to smoothly flow through the divided

passages

21b and 21 c.

The separator 25 includes a 2 nd bend 25c which is continuous with the downstream side of the 1 st bend 25b and is convexly bent toward the side close to the center line CT. This allows air sucked from the

suction ports

4b and 4c at both ends in the longitudinal direction a to be smoothly guided to the downstream portion of the suction passage 21.

The partition plate 25 has a downstream vertical portion 25d substantially perpendicular to the longitudinal direction a at a downstream end continuing to the 2 nd bent portion 25 c. This allows air flowing through the main passage 21a, the divided passages 21b, and the divided passages 21c to be smoothly guided to the outlet 22.

The width W1 in the longitudinal direction a of the main passage 21a of the suction port 4 is wider than the width W3 in the longitudinal direction a of the divided passage 21b of the suction port 4 and the width W5 in the longitudinal direction a of the divided passage 21 c. By forming the three suction ports as described above and performing suction by division, turbulence is less likely to occur in the suction nozzle 20, and the suction amount of the suction nozzle 20 can be increased. Further, by forming the divided

flow paths

21b and 21c having a narrow width on the outer side in the longitudinal direction a of the suction port 4, the suction efficiency at the end portion in the longitudinal direction a of the suction nozzle 20 where the suction force is likely to be weakest before can be further improved.

The vacuum cleaner 1 includes a suction nozzle 20, a dust collecting unit 8 disposed downstream of the suction nozzle 20, and an electric blower 7 disposed downstream of the dust collecting unit 8. Thus, the vacuum cleaner 1 having improved suction efficiency and cleaning efficiency can be easily realized. Since the air flows in the main passage 21a, the divided passages 21b, and the divided passages 21c in a laminar flow state, the dust D can be smoothly sucked from the

suction ports

4b and 4c at both ends in the longitudinal direction a without increasing the rotation number of the electric blower 7. Therefore, the turbulence in the dust collecting part 8 can be reduced, and the dust D accumulated in the dust collecting part 8 can be prevented from flying again.

The suction passage 21 extends upward from the suction port 4, is connected to the upper portion of the dust collecting part 8, and covers a part of the dust collecting part 8 with the suction nozzle 20. This makes it possible to reduce the size of the vacuum cleaner 1.

In the present embodiment, the 2 nd bent portion 25c and the downstream side vertical portion 25d may be omitted, and the 1 st bent portion 25b may be formed from the downstream end of the upstream side vertical portion 25a to the outlet 22.

< embodiment 2 >

Next, embodiment 2 of the present invention will be explained. Fig. 10 is a perspective view of an air passage including a suction side of a suction nozzle of the vacuum cleaner according to embodiment 2. Fig. 11 is a front sectional view of a suction nozzle of the vacuum cleaner of embodiment 2. For convenience of explanation, the same components as those in embodiment 1 shown in fig. 1 to 9 are denoted by the same reference numerals. The shape of the partition 25 in embodiment 2 is different from that in embodiment 1. The other portions are the same as those of embodiment 1.

A plurality of flat plate-like partition plates 25 are arranged in parallel in the longitudinal direction a in the suction passage 21. The partition plate 25 is formed of a flat plate perpendicular to the lower wall 28b and arranged on a straight line from the suction port 4 side to the outlet port 22 side. That is, the partition plate 25 is flat and arranged on a straight line from the inlet 4 side to the outlet 22 side. The two partitions 25 are disposed so as to be inclined so as to be closer to each other from the suction port 4 toward the outflow port 22 in front view.

According to this embodiment, the same effects as those of embodiment 1 can be obtained. The partition plate 25 is flat and arranged on a straight line from the inlet 4 side to the outlet 22 side. This can easily prevent the separation of the air flow flowing through the main passage 21a, the divided passages 21b, and the divided passages 21c from the partition plate 25, thereby further reducing the occurrence of turbulence.

< embodiment 3 >

Next, embodiment 3 of the present invention will be explained. Fig. 12 is a perspective view of an air passage including a suction side of a suction nozzle of the vacuum cleaner according to embodiment 3. Fig. 13 is a front sectional view of a suction nozzle of the vacuum cleaner of embodiment 3. For convenience of explanation, the same components as those in embodiment 1 shown in fig. 1 to 9 are denoted by the same reference numerals. The shape of the partition 25 in embodiment 3 is different from that in embodiment 1. The other portions are the same as those of embodiment 1.

The partition plate 25 includes 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. Unlike embodiment 2, in embodiment 3, the partition plate 25 has a downstream vertical portion 25d substantially perpendicular to the longitudinal direction a at the downstream end. Thus, the air reaching 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 outlet 22. The straight portion 25e is formed continuously from the downstream end of the upstream vertical portion 25a and the upstream end of the downstream vertical portion 25d, respectively, and is formed on a straight line.

In this embodiment, the same effects as those of embodiment 1 can be obtained. In the present embodiment, the upstream vertical portion 25a or the downstream vertical portion 25d may be omitted.

< embodiment 4 >

Next, embodiment 4 of the present invention will be explained. Fig. 14 is a perspective view of a vacuum cleaner according to embodiment 4. Fig. 15 and 16 are front and side sectional views of a suction nozzle of a vacuum cleaner according to embodiment 4. For convenience of explanation, the same components as those in embodiment 1 shown in fig. 1 to 9 are denoted by the same reference numerals. The 4 th embodiment is different from the 1 st embodiment in that a so-called canister type vacuum cleaner 30 is used instead of the robot vacuum cleaner 1. The other portions are the same as those of embodiment 1.

The vacuum cleaner 30 has an air inlet 31 and an air outlet 5 opened in the front and rear surfaces of the housing 2, respectively. An air passage 6 connecting the air inlet 31 and the air outlet 5 is formed in the housing 2. A dust collecting section 8, a filter 9, and an electric blower 7 are arranged in this order from the upstream side to the downstream side in the air passage 6. A pair of left and right wheels 39 are attached to the side surface of the housing 2. The vacuum cleaner 30 is provided with a power supply cord (not shown) that can be connected to a commercial power supply (not shown).

A hose 32 is connected to the inlet port 31 of the housing 2, and a connecting pipe 34 is connected to an upstream end of the hose 32. The connecting pipe 34 is provided with a grip portion 35 and an operation portion 16. The operation of the operation unit 16 instructs the on/off of the vacuum cleaner 30, the change of the rotation number of the electric blower 7, and the like. An extension pipe 33 is attached to an upstream end of the connecting pipe 34. A suction nozzle 20 is detachably attached to the extension pipe 33 at an upstream end of the extension pipe 33.

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

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

The air flowing through the main passage 21a, the divided passage 21b, and the divided passage 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 air inlet 31. The dust D in the air flowing into the housing 2 is collected by the dust collecting unit 8. This allows the floor surface F to be cleaned.

The same effects as those of embodiment 1 can be obtained in this embodiment. In addition, the horizontal vacuum cleaner 30 can also improve the suction efficiency and the cleaning efficiency.

< embodiment 5 >

Next, embodiment 5 of the present invention will be described. Fig. 17 is a perspective view of a vacuum cleaner according to embodiment 5. For convenience of explanation, the same components as those in embodiment 1 shown in fig. 1 to 9 are denoted by the same reference numerals. The embodiment 5 is different from the embodiment 1 in that a so-called stick type vacuum cleaner 40 is used instead of the robot vacuum cleaner 1. The other portions are the same as those of embodiment 1.

The vacuum cleaner 40 includes a housing 2 having an air inlet 41 and an air outlet 5 formed in a lower surface and an upper surface, respectively. An air passage 6 connecting the air inlet 41 and the air outlet 5 is formed in the housing 2. A dust collecting section 8, a filter 9, and an electric blower 7 are arranged in this order from the upstream side to the downstream side in the air passage 6. The vacuum cleaner 40 is provided with a power cord (not shown) similar to that of embodiment 4.

A grip portion 35 and an operation portion 16 are provided on the upper portion of the housing 2. A rod-shaped suction pipe 47 is connected to the suction port 41 of the housing 2. A suction nozzle 20 is detachably attached to the suction pipe 47 at the upstream end of the suction pipe 47. The configuration of the suction nozzle 20 of the present embodiment is the same as that of the suction nozzle 20 of embodiment 4.

The same effects as those of embodiment 1 can be obtained in this embodiment. In addition, the suction efficiency and the cleaning efficiency can be improved in the stick type vacuum cleaner 40.

< embodiment 6 >

Next, embodiment 6 of the present invention will be described. Fig. 18 is a perspective view of a vacuum cleaner according to embodiment 6. For convenience of explanation, the same components as those in embodiment 1 shown in fig. 1 to 9 are denoted by the same reference numerals. The embodiment 6 differs from the embodiment 1 in that a so-called hand-held (hand-type) vacuum cleaner 50 is used instead of the robot vacuum cleaner 1. The other portions are the same as those of embodiment 1.

The structure of the vacuum cleaner 50 is the same as that of the vacuum cleaner 40 according to embodiment 5, except that the suction pipe 47 is omitted. The user can hold the grip portion 35 and clean the floor surface F, the table (surface to be cleaned), and the like with the vacuum cleaner 50.

The same effects as those of embodiment 1 can be obtained in this embodiment. In addition, the suction efficiency and the cleaning efficiency can be improved in the hand-held cleaner 50.

In the suction nozzles 20 according to embodiments 4 to 6, a partition plate similar to the partition plate 25 according to embodiments 2 and 3 may be provided instead of the partition plate 25 according to embodiment 1.

In the suction nozzles 20 according to embodiments 4 to 6, a rotary brush may be provided in the suction port 4.

[ industrial applicability ]

According to the present invention, the present invention can be used for a suction nozzle and a vacuum cleaner having the same.

Further, the respective elements appearing in the above embodiment or the modified examples may be appropriately combined within a range not to contradict each other.

It is considered that the preferred embodiments of the present invention described above are obvious to those skilled in the art that variations and modifications may be made without departing from the scope and spirit of the present invention. The scope of the invention is therefore intended to be determined solely by the appended claims.

Claims

1. A suction nozzle is provided on a vacuum cleaner including an electric blower,

the suction nozzle includes:

a suction port extending in a predetermined longitudinal direction so as to face the surface to be cleaned;

an outlet port connected to the electric blower;

a suction passage extending in a center line direction connecting a center of the suction port in the longitudinal direction and a center of the outlet port in the longitudinal direction, and connecting the suction port and the outlet port; and

a plurality of partitions provided inside the suction passage and extending from the suction port side to the flow outlet side; and is

The suction path includes:

a main passage that divides the suction passage in the longitudinal direction of the suction port by the partition plate, the center line of the suction passage being located on the main passage; and

a plurality of divided passages located on both outer sides in the longitudinal direction with respect to the main passage with the partition plate interposed therebetween;

the suction nozzle is characterized in that:

a width in the longitudinal direction of the main passage of the suction port is wider than a width in the longitudinal direction of the main passage of the discharge port,

and a width in the longitudinal direction of the main passage of the suction port is wider than a width in the longitudinal direction of the divided passage of the suction port.

2. The suction nozzle as claimed in claim 1, wherein: at the upstream end, the partition plate includes an upstream-side vertical portion perpendicular to the longitudinal direction.

3. The suction nozzle as claimed in claim 2, wherein: the partition plate includes a 1 st bent portion continuous with a downstream side of the upstream-side perpendicular portion and convexly bent toward a side away from the center line.

4. The suction nozzle as claimed in claim 3, wherein: the separator includes a 2 nd bent portion continuous to a downstream side of the 1 st bent portion and convexly bent toward a side close to the center line.

5. The suction nozzle as claimed in claim 4, wherein: the partition plate includes a downstream side vertical portion perpendicular to the longitudinal direction at a downstream end continuous to the 2 nd bent portion.

6. The suction nozzle as claimed in claim 1, wherein: the partition plate includes a downstream-side vertical portion perpendicular to the longitudinal direction at a downstream end.

7. The suction nozzle as claimed in claim 1, wherein: the partition plate is flat and arranged on a straight line from the suction port side to the flow outlet side.

8. The suction nozzle as claimed in claim 1, wherein:

a width in the longitudinal direction of the outlet port is narrower than a width in the longitudinal direction of the suction port,

the downstream end of the partition is disposed within the width of the outflow port in the longitudinal direction.

9. A vacuum cleaner, comprising: a suction nozzle according to any one of claims 1 to 8; a dust collection section disposed downstream of the suction nozzle; and the electric blower is arranged at the downstream of the dust collecting part.

10. The vacuum cleaner of claim 9, wherein: the suction passage is formed to extend upward from the suction port, is connected to an upper portion of the dust collecting part, and covers an upper portion of a part of the dust collecting part with the suction nozzle.