JP2004329600A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a centrifuging type vacuum cleaner with excellent suction force. <P>SOLUTION: The vacuum cleaner has a centrifuging part 23 for centrifuging dust by whirling air sucked together with dust by the suction force of an electric blower (not indicated), and a main introducing part 30 and a subordinate introducing part 31 as introducing parts for introducing the sucked air into the centrifuging part 23. Since the vacuum cleaner has two introducing parts, the quantity of sucked air to be introduced into the centrifuging part 23 can be increased without reducing the speed of the whirling air current inside the centrifuging part 23, so that the vacuum cleaner with high suction force can be provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a vacuum cleaner having a centrifugal separation type dust collection unit that separates dust by swirling suction air containing dust.
[0002]
[Prior art]
In a conventional vacuum cleaner having a centrifugal separation type dust collecting unit, only one introduction unit for introducing suction air into the centrifugal separation type dust collection unit is provided, and the suction air flowing from the introduction unit is swirled. Thus, the dust is separated and accumulated under the dust collecting portion under the influence of the swirling airflow in the centrifugal dust collecting portion (for example, Patent Document 1 and Patent Document 2). reference).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-253011 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-342492
[Problems to be solved by the invention]
However, the vacuum cleaner having such a centrifugal dust collector has a problem that the suction power is considerably lower than that of a paper bag vacuum cleaner. This is because, in the centrifugal separation method, it is necessary to increase the swirling airflow in the centrifugal separation unit as a means for increasing the dust separation rate, and therefore, the inlet of the centrifugal separation unit is narrowed to increase the inflow air velocity. That is, restricting a part of the flow passage restricts the air volume, which is one of the factors that lowers the suction force.
[0005]
The present invention solves the above-mentioned problems, and an object of the present invention is to provide a centrifugal vacuum cleaner having excellent suction power.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an electric blower that generates a suction wind, a suction device that communicates with the electric blower and sucks dust, and a centrifuge that separates dust by turning the suction wind sucked together with the dust. The centrifugal separation unit is provided with a plurality of introduction units for introducing suction air into the centrifugal separation unit, so that the amount of air flowing into the centrifugal separation unit can be increased without reducing the speed of the swirling airflow in the centrifugal separation unit. A vacuum cleaner having a high suction power can be provided.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention provides an electric blower that generates a suction wind, a suction tool that communicates with the electric blower and sucks dust, and a centrifuge that separates dust by turning the suction wind sucked together with the dust. The centrifugal separation unit is provided with a plurality of introduction units for introducing suction air, so that the amount of air flowing into the centrifugal separation unit can be increased without reducing the speed of the swirling airflow in the centrifugal separation unit. Thus, a vacuum cleaner having a high suction power can be provided.
[0008]
According to a second aspect of the present invention, the centrifugal separator is formed in a substantially cylindrical shape, and a plurality of inlets are provided in the circumferential direction of the substantially circular cross section of the centrifugal separator. When the flow velocity of the swirling flow that has flowed into the section becomes small, the suction air flows into the centrifugal separation section from another introduction section, so that it is possible to prevent a reduction in the speed of the swirling airflow in the centrifugal separation section, and to generate electricity with high suction power. A vacuum cleaner can be provided.
[0009]
The invention according to claim 3 of the present invention is characterized in that the introduction section is composed of a main introduction section and a sub introduction section, and the opening area of the main introduction section is set larger than that of the sub introduction section. By increasing the flow rate of the air, the flow of the main suction air can be regulated, and if a dust storage section for storing coarse dust is provided on the upstream side of the centrifugal separation section, the coarse dust Since the dust is sequentially stored, the storage capacity of the dust in the dust container can be increased.
[0010]
The invention according to claim 4 of the present invention is characterized in that a guide portion is provided such that suction air flowing from the introduction portion into the centrifugal separation portion rotates in the same direction in the centrifugal separation portion. The turbulence in the air is prevented, and the efficient centrifugal separation increases the dust separation rate, reduces the intake air flow rate and improves the sustainability of the cleaning function.
[0011]
According to a fifth aspect of the present invention, there is provided an electric blower that generates a suction wind, a suction device that communicates with the electric blower and suctions dust, and a centrifuge that separates the dust by turning the suction wind sucked together with the dust. Unit, and a dust storage unit that stores the dust separated by the centrifugal separation unit, and the centrifugal separation unit is provided with a communication unit that communicates with the dust storage unit, and the upstream of the communication unit on the intake side. The inner wall of the centrifugal separator is deformed outward, and a stagnation space for airflow is formed in the front part of the communication part, where the wind speed of the suction air drops and the dust easily flows into the dust storage part. The separation rate of the air is increased, and the reduction of the intake air volume is small, and the sustainability of the cleaning function can be improved.
[0012]
The invention according to claim 6 of the present invention includes an electric blower that generates a suction wind, a suction device that communicates with the electric blower to suck dust, and a dust collection unit that separates the dust from the suction wind, The dust part includes a coarse dust storage part that stores the coarse dust, a centrifugal separation part that separates the fine dust by turning the suction air after passing through the coarse dust storage part, and a fine dust storage that stores the separated fine dust. And the three chambers of the coarse dust container, the centrifugal separator, and the fine dust container are superimposed on each other and are integrally formed, and a double wall and a mating part of parts are not required for the suction air passage. Therefore, the maintenance of the dust collection chamber can be easily performed because a narrow gap in which fine dust easily enters is not formed.
[0013]
The invention according to claim 7 of the present invention is characterized in that the fine dust container is disposed downstream of the centrifugal separator at the intake side, and a communicating part that communicates the centrifugal separator with the fine dust container is provided by the centrifugal separator. Provided on the downstream side of the intake air, the dust collecting portion can be compactly arranged, and the separation rate of fine dust can be increased.
[0014]
The invention according to claim 8 of the present invention is characterized in that a guide portion for guiding fine dust to the fine dust storage portion is provided near a communication portion that communicates the centrifugal separation portion and the fine dust storage portion, Can be further increased.
[0015]
According to the ninth aspect of the present invention, an acute angle portion is not provided on the wall surface forming the fine dust container, so that the fine dust can be easily separated and the collected dust can be easily and neatly cleaned. Can be discharged.
[0016]
【Example】
(Example 1)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0017]
In FIG. 1, a vacuum cleaner 1 has a suction device 3 attached to an extension tube 2 for sucking dust, and the extension tube 2 is connected to a cleaner main body 7 via a hand handle 4 and a hose 6 with a hose joint 5. (Hereinafter, referred to as main body 7). The main body 7 includes one front wheel caster 8 rotatably pivotally supported and a pair of rear wheels 9.
[0018]
As shown in FIG. 2, suction is performed from the suction tool 3 in FIG. 1 into a recess 10 formed in the front of the main body 7 and passes through a suction passage (not shown) in the extension pipe 2 and the hose 6. Then, a dust collecting case 11, which is a dust collecting portion for separating and collecting dust transferred to the main body 7 from the suction wind, is detachably mounted.
[0019]
In addition, an electric blower 12 and the like that generate a suction wind are incorporated behind the concave portion 10 of the main body 7. The suction side of the electric blower 12 communicates with the air suction unit 14 through the opening 13. The air suction part 14 is surrounded by the inclined sealing surface 15 which comes into contact with the dust collection case 11 when the dust collection case 11 is placed. An exhaust filter 16 is provided at a rear portion of the main body 7, and exhaust air from the electric blower 12 passing through the exhaust filter 16 is discharged outside the main body 7. Further, the main body 7 includes other components, that is, an electric system such as a control unit 17 for controlling the power consumption of the electric blower 12 and a code (not shown) for supplying power to the electric blower 12. A winding device (not shown) for winding the cord is incorporated.
[0020]
The front wall 18 of the main body 7 rises from the bottom wall 19, and this bottom wall 19 is the lower end surface of the recess 10. An intake port 20 for detachably connecting the hose joint 5 is provided at a substantially central portion of the front wall 18. The seal packing 21 is attached to the end face of the intake port 20 on the side of the concave portion 10 to prevent air leakage between the intake port 20 and the dust collecting case 11.
[0021]
As shown in FIGS. 3 to 6, the dust collecting case 11 includes a coarse dust container 22 provided below the dust collecting case 11 for collecting coarse dust from a dust-containing airflow passing through the air inlet 20. A centrifugal separation unit 23 for separating fine dust from an airflow from which most of the coarse dust has been removed, the centrifugal separation unit 23 being provided to overlap with the coarse dust storage unit 22 and, in this embodiment, to overlap upward; There are formed three chambers of a fine dust storage portion 24 provided below the portion 23 and in parallel with the coarse dust storage portion 22 and accumulating fine dust centrifugally separated by the centrifugal separation portion 23. The part 22 and the fine dust container 24 are partitioned from each other. A suction port 26 is formed in a case front wall 25 of the dust collection case 11, and one end of the suction port 26 is concentric with the suction port 20 when the dust collection case 11 is set on the main body 7. The other end is in communication with the coarse dust container 22.
[0022]
3 and 4, the coarse dust container 22 has a dust container lid 27 that can be opened and closed at the bottom, and communicates with the centrifugal separator 23 via a primary filter 33 that is coarse dust collecting means. . The primary filter 33 plays a role of collecting coarse dust in the coarse dust storage portion 22 of the suction air containing dust flowing into the coarse dust storage portion 22, whereby the coarse dust is stored in the coarse dust storage portion 22. It is configured to be stored in the unit 22. In this embodiment, as shown in FIG. 3, the primary filter 33 is composed of a primary filter A33a disposed above the coarse dust container and a primary filter B33b disposed behind (hereinafter, the primary filters A and B are referred to as primary filters A and B). Also referred to as the primary filter 33).
[0023]
Above the primary filter A33a and below the centrifugal separator 23, an isolating wall is formed integrally with the separator wall 28 forming the centrifugal separator 23 so as to keep a predetermined vertical distance from the primary filter 33. 29 are formed. At the end of the separating wall 29, a main introduction part 30 communicating with the air intake upstream side of the centrifugal separation part 23 is also formed. Therefore, a channel space 32 is provided between the coarse dust container 22 and the centrifugal separator 23 in the up-down direction. The dust collecting case 11 is provided separately in the left-right direction with respect to the vertical center axis. In this embodiment, when viewed from the front of the dust collecting case 11, the suction port 26 and the main introduction portion 30 are respectively provided at substantially ends of the dust collecting case 11.
[0024]
Next, the centrifugal separation unit 23 is formed in a substantially cylindrical shape by a separation unit wall 28 on the upper right side when viewed from the front of the dust collection case 11, and the main introduction unit 30 and the centrifugal separation unit 23 communicate with each other. The airflow flowing from the introduction part 30 to the centrifugal separation part 23 is caused to flow in the tangential direction of the inner circumference of the separation part wall 28. In the centrifugal separation section 23, a main introduction section 30 is provided in the circumferential direction of the substantially circular cross section of the centrifugal separation section 23, and at a position substantially diagonal to the main introduction section 30, similarly to the main introduction section 30. A sub-introduction section 31 is provided for communicating the coarse dust storage section 22 with the centrifugal separation section 23. In the present embodiment, a sub-introduction section 31 is provided at a position substantially diagonally opposite to the main introduction section 30 to communicate the coarse dust storage section 22 and the centrifugal separation section 23 as in the main introduction section 30. The centrifugal separator 23 may be provided at the center axis in the cross-sectional direction of the substantially circular cross section. As shown in FIG. 5, the opening area (part a) of the sub introduction part 31 is set smaller than the opening area (part b) of the main introduction part 30. A communication part 34 is formed in the separation part wall 28, and communicates the centrifugal separation part 23 and the fine dust storage part 24. The communication portion 34 is provided on the side of the separation portion wall 28, and fine dust centrifugally separated in the centrifugation portion 23 passes through the communication portion 34 as indicated by an arrow partially drawn by a broken line. It is transported into the fine dust container 24.
[0025]
As shown in FIG. 3, a packing 36 is fitted to the outer periphery of the lid plate 35, and is detachably attached to the dust collecting case 11 by being attached to an opening on the intake side of the electric blower 12 without any gap. When the dust collecting case 11 is attached to the concave portion 10, the packing 36 is lightly pressed against the inclined sealing surface 15 in FIG. 2 to prevent outside air from flowing into the air suction portion 14 from outside the main body 7. ing.
[0026]
As shown in FIGS. 3 and 4, reference numeral 38 denotes a secondary filter which is located substantially concentrically in the centrifugal separation section 23. , And a nonwoven fabric filter 39 for filtering and collecting fine dust is disposed further behind (downstream side). The fine dust adhering to the nonwoven fabric filter 39 can be dropped into the coarse dust container 22 by a dust removing lever (not shown) rotatably fixed to the lid plate 35. In addition, a handle 40 is formed in front of the dust collecting case 11. In the vicinity of the handle 40, a buckle button 41 operated when opening and closing the dust container lid 27 is provided. The buckle button 41 receives the urging force of the spring 42 and releases the holding lever 43 of the dust container lid 27.
[0027]
Next, the operation and operation of the above configuration will be described.
[0028]
When the electric blower 12 is put into an operation state, the air flow including dust sucked from the suction tool 3 flows into the intake port 20 through the extension pipe 2 and the hose 6. This air flow passes through the inlet 26 and enters the coarse dust container 22, and then passes through the primary filter 33. Large dust having a projection area larger than the area of the hole of the primary filter 33 is removed by the primary filter 33. And is accumulated in the coarse dust container 22. Fine dust having a projected area smaller than the area of the hole of the primary filter 33 passes through the main introduction part 30 and the sub introduction part 31 together with the airflow and enters the centrifugal separation part 23.
[0029]
The air entering the centrifugal separator 23 flows in the tangential direction of the separator wall 28 having a substantially cylindrical cross section that forms the centrifugal separator 23, and forms a swirling vortex along the inner surface of the separator wall 28. To turn. The dust entering the centrifugal separator 23 is subjected to the action of the centrifugal force generated by the swirling vortex, and is rotated by the centrifugal force from the communicating portion 34 while rotating along the inner surface of the separator wall 28 so as to be finely dusted. The inside of the accommodating section 24 is entered.
[0030]
Also, the air at the center of rotation of the swirling vortex has almost no dust, but after being filtered by the secondary filter 38 and the nonwoven fabric filter 39, is sucked into the electric blower 12 from the air suction part 14, The dust is further removed by passing through the exhaust filter 16, and the dust is exhausted to the outside of the main body 7, that is, to the atmosphere.
[0031]
Dust that accumulates in the coarse dust storage unit 22 is compressed by receiving the wind pressure pressed against the primary filter 33 by the airflow from the main introduction unit 30 to the centrifugal separation unit 23, and the volume of the coarse dust storage unit 22 is exceeded. Dust can be accumulated. In particular, the effect is greater when sucking fibrous dust having a large bulk for its mass.
[0032]
When discarding dust and the like accumulated inside the cleaner, the handle 40 is grasped, the dust collecting case 11 is lifted, and the dust collecting case 11 is removed from the concave portion 10 of the main body 7. Next, by operating the buckle button 41 provided near the handle 40 and opening the dust container lid 27, both the coarse dust container 22 and the fine dust container 24 are simultaneously opened and can be discharged to a trash box or the like. In addition, even if dust adheres in the dust collecting case 11, it can be easily washed with water in the above-mentioned state, and can be sanitarily cleaned.
[0033]
As described above, according to the above embodiment, the centrifugal separation unit 23 is provided with the main / sub-introduction units 30 and 31 and the plurality of introduction units, so that the centrifugal separation can be performed without reducing the speed of the swirling airflow in the centrifugal separation unit 23. Since the amount of air that can be introduced into the section 23 can be increased, the suction power of the vacuum cleaner can be increased without lowering the centrifugal separation effect.
[0034]
Next, regarding the size of the main introduction part 30 and the sub introduction part 31 leading to the centrifugal separation part 23, the main introduction part 30 is set to be larger than the sub introduction part 31, and the air volume of the main introduction part 30 is increased. By doing so, the flow of the main suction air can be regulated, and as described above, it is possible to achieve both the dust compression effect in the coarse dust storage portion 22 and the increase in the suction force.
[0035]
Further, as shown in FIG. 5, a guide portion A45 is provided in the sub-introduction portion 31 for smoothly flowing the suction air in the same rotation direction as the suction air flowing into the centrifugal separation portion 23 from the main introduction portion 30. Thereby, turbulence in the centrifugal separation section 23 can be prevented, and the centrifugal separation capability can be further increased.
[0036]
In addition, by providing a plurality of suction air introduction portions 30 from the coarse dust storage portion 22 to the centrifugal separation portion 23 instead of a pair, the amount of air that can flow into the centrifugal separation portion 23 is further increased, and a higher suction force is obtained. Is what you can do.
[0037]
(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, about the same part as the said Example, the description is abbreviate | omitted using the same code | symbol and a name.
[0038]
In the present embodiment, in the centrifugal separator 23 based on a cylindrical shape, R (radius dimension) of a portion (upstream of intake air) in front of the communicating portion 34 with the fine dust container 24 is set to be small and deformed. It is a shape.
[0039]
With the above configuration, an airflow stagnation space is formed in a portion in front of the communicating portion 34 with the fine dust storage portion 24, and the fine particles easily flow into the fine dust storage portion 24 by reducing the wind speed, and efficient centrifugation is performed. As a result, the dust separation rate can be increased, and there is little decrease in the amount of intake air, and the sustainability of the cleaning function can be improved.
[0040]
(Example 3)
Next, a third embodiment of the present invention will be described with reference to FIG. The same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
[0041]
In the present embodiment, as shown in the drawing, three chambers of a coarse dust container 22, a centrifugal separator 23, and a fine dust container 24 are overlapped with each other and formed integrally. This eliminates the necessity of a double wall or a mating portion of parts in the passage of the suction air, and does not form a narrow gap through which fine dust easily enters. Therefore, cleaning and maintenance of the dust collecting case 11 are easily performed. be able to.
[0042]
Further, the fine dust container 24 is disposed substantially vertically downward on the downstream side of the intake of the centrifugal separator 23, and the communication part 34 that communicates the centrifugal separator 23 and the fine dust container 24 is separated by the centrifugal separator. When the dust collecting case 11 is provided on the downstream side of the intake air in the portion 23, the dust collecting case 11 can be made compact and the fine dust separation rate can be increased. In the present embodiment, the fine dust container 24 is disposed substantially vertically below the centrifugal separator 23. However, the fine dust container 24 may be in the horizontal direction as long as it is downstream of the centrifugal separator 23 on the intake side.
[0043]
Further, as shown in the figure, when the guide portion B46 is provided near the entrance of the communication portion 34, the separation rate of fine dust can be further increased.
[0044]
Also, if the sharp wall is not provided on the wall surface forming the fine dust container 24, the detachability of the fine dust is improved, and the collected dust can be discharged easily and neatly. It is also possible to prevent dust from being trapped in each dust collection chamber when discharging the dust.
[0045]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, in a vacuum cleaner provided with the centrifugal-separation type dust collection part, suction force can be improved.
[Brief description of the drawings]
FIG. 1 is an overall external view of a vacuum cleaner showing a first embodiment of the present invention; FIG. 2 is a side sectional view of a main body of the vacuum cleaner; FIG. FIG. 4 is a sectional view taken along line AA of FIG. 3 FIG. 5 is a sectional view taken along line AA of FIG. 3 FIG. 6 is a bottom view of the dust collecting case (with a dust container cover removed).
FIG. 7 is a cross-sectional view of the dust collecting case of the vacuum cleaner according to the second embodiment of the present invention (cross section taken along line AA in FIG. 3).
FIG. 8 is a rear perspective view of a dust collecting case of a vacuum cleaner showing a third embodiment of the present invention.
11 Dust collection case (dust collection part)
12 electric blower 22 coarse dust storage section 23 centrifugal separation section 24 fine dust storage section (dust storage section)
26 Suction port 27 Dust container cover 30 Main introduction section 31 Sub introduction section 32 Flow path space section 34 Communication section 45 Guide section A
46 Guide B

Claims (9)

An electric blower that emits suction air, a suction device that communicates with the electric blower and sucks dust, and a centrifugal separation unit that separates dust by turning the suction air sucked together with the dust to separate dust. Vacuum cleaner with multiple inlets to introduce wind. The vacuum cleaner according to claim 1, wherein the centrifugal separator is formed in a substantially cylindrical shape, and a plurality of inlets are provided in a circumferential direction of a substantially circular cross section of the centrifugal separator. The vacuum cleaner according to claim 1, wherein the introduction unit includes a main introduction unit and a sub introduction unit, and an opening area of the main introduction unit is set to be larger than that of the sub introduction unit. The vacuum cleaner according to any one of claims 1 to 3, wherein a guide unit is provided such that suction air flowing into the centrifugal unit from the introduction unit rotates in the same direction in the centrifugal unit. An electric blower that generates a suction wind, a suction device that communicates with the electric blower and suctions dust, a centrifugal separation unit that turns the suction wind sucked together with the dust to separate dust, and a centrifugal separation unit that separates the dust. A dust storage unit for storing dust, a communication unit communicating with the dust storage unit is provided in the centrifugal separation unit, and an inner wall of the centrifugal separation unit on the intake upstream side of the communication unit is deformed outward. Vacuum cleaner. An electric blower that generates a suction wind, a suction device that communicates with the electric blower and suctions dust, and a dust collection unit that separates the dust from the suction wind, wherein the dust collection unit is configured to store coarse dust. A storage unit, a centrifugal separation unit that separates fine dust by rotating the suction air after passing through the coarse dust storage unit, and a fine dust storage unit that stores the separated fine dust, the coarse dust storage unit; A vacuum cleaner in which the three chambers of the centrifugal separation unit and the fine dust storage unit are superimposed on each other and are integrally formed. 7. The fine dust container is arranged on the downstream side of the centrifugal separator at the intake side, and a communicating part for communicating the centrifugal separator with the fine dust container is provided on the downstream side of the centrifugal separator at the intake side. Vacuum cleaner. The vacuum cleaner according to claim 6 or 7, further comprising: a guide portion that guides fine dust to the fine dust storage portion, near a communication portion that communicates the centrifugal separation portion and the fine dust storage portion. The vacuum cleaner according to any one of claims 6 to 8, wherein an acute angle portion is not provided on a wall surface forming the fine dust container.

Images