CN102078165B - Cyclonic dust collector and electric dust collector equipped therewith - Google Patents

Abstract

The present invention provides a cyclone dust collecting device, comprising a cylindrical filter disposed inside the cylindrical dust collecting box coaxially with the dust collecting box, and a cylindrical filter disposed below the filter. The dust storage space, the extended portion extending from the bottom of the filter toward the dust storage space in an umbrella shape, and the cyclone space formed between the inner peripheral surface of the dust box and the outer peripheral surface of the filter. Furthermore, the dust box has an inclined portion that expands corresponding to the umbrella shape of the extension, and a dust collection passage is formed between the outer peripheral surface of the extension and the inner peripheral surface of the inclined portion of the dust box. According to this configuration, a force pushing dust is generated from the cyclone space toward the dust storage space, and the dust accumulated in the dust storage space is suppressed from returning to the cyclone space, thereby improving dust collection efficiency.

Description

Cyclone dust collecting device and electric vacuum cleaner with the cyclone dust collecting device

technical field

The invention relates to a cyclone dust collecting device and an electric vacuum cleaner with the cyclone dust collecting device.

Background technique

A cyclone-type electric vacuum cleaner includes an electric blower for sucking air, a suction unit for sucking dust together with the air, and a dust collector. The dust collecting device includes a cylindrical dust collecting part and a dust collecting chamber arranged under the dust collecting part. The air sucked together with the dust from the suction part rotates inside the dust collecting part. As a result, the dust mixed in the air is separated by centrifugal force. The separated dust is captured and collected in the dust chamber. The air from which dust has been removed is sucked by the electric blower. The dust captured and collected in the dust collection chamber is mainly flocculent dust. Therefore, dust sometimes flies back to the suction side. In order to suppress return of dust to the suction part side, for example, there is a structure described in JP 2000-135184 A (Patent Document 1). The dust collecting device described in Patent Document 1 has steps by making the inner diameters of the dust collecting part and the dust collecting chamber different. In the dust collecting device described in Patent Document 1, the step prevents dust from returning from the dust collecting chamber. However, this structure cannot fully suppress the return of dust from the dust collecting chamber.

Contents of the invention

The present invention provides a cyclone type dust collector capable of suppressing captured and collected dust from returning to the suction part side as much as possible and having high dust collection efficiency. The cyclone dust collector of the present invention includes a cylindrical dust box and a first opening for introducing air and dust into the dust box. The cyclone dust collector of the present invention also includes a cylindrical filter arranged coaxially with the dust box inside the dust box, and a filter formed on the inner peripheral surface of the dust box and the outer peripheral surface of the filter. The whirlwind space in between. In addition, the cyclone dust collecting device of the present invention further includes a cylindrical dust accumulation space provided under the filter. The cyclone dust collector of the present invention further includes an umbrella-shaped extension extending from the bottom of the filter toward the dust storage space, and a second opening for discharging air from the dust box to the outside. Moreover, the dust collecting box of the cyclone dust collecting device of the present invention has an inclined portion extending correspondingly to the umbrella shape of the extending portion, and a groove is formed between the outer peripheral surface of the extending portion and the inner peripheral surface of the inclined portion of the dust collecting box. Dust collection path.

According to this configuration, a force pushing dust is generated from the cyclone space toward the dust accumulation space. This force is used to suppress the dust accumulated in the dust accumulation space from returning to the cyclone space. Since the dust does not return to the cyclone space, the return of the dust to the suction side can be suppressed, and the dust collection efficiency can be improved.

Description of drawings

Fig. 1 is a perspective view of an electric vacuum cleaner including a cyclone dust collector according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view of the cyclone-type dust collector of this embodiment seen from the front.

Fig. 3 is a perspective view of the cyclone-type dust collector according to the embodiment seen from the rear.

Fig. 4 is a partially cutaway perspective view showing the internal structure of the cyclone dust collector according to the embodiment.

Fig. 5 is a sectional view taken along line 5-5 in Fig. 2 .

Fig. 6 is a sectional view taken along line 6-6 in Fig. 3 .

Detailed ways

(Embodiment 1)

Fig. 1 is a perspective view of an electric vacuum cleaner including a cyclone dust collector according to Embodiment 1 of the present invention. The vacuum cleaner main body 1 has an electric blower 6 and a cyclone dust collector 7 inside. Moreover, the suction port 1a is formed in the front of the electric vacuum cleaner main body 1. As shown in FIG. A hose 2 is connected to the suction port 1a. A connection pipe 3 is connected to the hose 2 . An extension pipe 4 is connected to the connection pipe 3 . A suction element 5 is connected to the extension tube 4 . Thus, the vacuum cleaner 100 is formed by sequentially connecting the hose 2 , the connection pipe 3 , the extension pipe 4 , and the suction tool 5 from the suction port 1 a of the vacuum cleaner main body 1 . The electric blower 6 generates a suction force for sucking in air. The suction force acts on the suction member 5 via the cyclone dust collector 7 , the suction port 1 a , the hose 2 , the connecting pipe 3 and the extension pipe 4 in sequence. In this way, the dust is sucked from the suction member 5 together with the air, and sent to the cyclone dust collector 7 . In addition, in FIG. 1 , cyclone dust collector 7 is incorporated in electric vacuum cleaner main body 1 . On the other hand, the cyclone type dust collector 7 can be set as the structure exposed and attached to the outer side of the electric vacuum cleaner main body 1. As shown in FIG. In this case, attachment and detachment of the cyclone dust collector 7 becomes easy.

FIG. 2 is a perspective view of the cyclone dust collector 7 viewed from the front. Fig. 5 is a sectional view taken along line 5-5 in Fig. 2 . FIG. 3 is a perspective view of the cyclone dust collector 7 viewed from the rear. Fig. 6 is a sectional view taken along line 6-6 in Fig. 3 . FIG. 4 is a partially cutaway perspective view showing the internal structure of the cyclone dust collector 7 .

The cyclone type dust collecting device 7 comprises: a substantially cylindrical dust box 8; a cover 9 for blocking the bottom surface of the dust box 8; a cover 11 for blocking the upper surface of the dust box 8; The handle 10 on the cover 11. In this way, the outline of the cyclone dust collector 7 is formed. In addition, the cover 11 is engaged with the dust box 8 by hooks 15 and claws 14 .

The cover 9 is rotatably attached by a hinge 13 provided on the dust box 8 . The cover 9 is locked on the dust box 8 by a locking member 18 for closing the bottom surface of the dust box 8 . As shown in FIG. 5 , by pressing the lever 12 from above, the slider 47 is moved downward. The slider 47 moved downward presses the upper end portion 18a of the locking member 18 inwardly (to the left in FIG. 5 ). The locking member 18 rotates around the shaft 18b to release the locking of the cover 9 . Thereby, the cover 9 is rotated downward and opened. Moreover, the packing 29 is attached to the cover 9, and the airtightness between the dust box 8 and the cover 9 is maintained by the packing 29. As shown in FIG.

As shown in FIGS. 5 and 6 , a filter 21 having a substantially cylindrical shape is disposed in the dust collecting box 8 so as to be substantially coaxial with the cylindrical shape of the dust collecting box 8 . The filter 21 is mounted using a filter mounting frame 57 . An umbrella-shaped extension 22 is formed below the filter 21 . The extension part 22 is attached to the lower part of the filter mounting frame 57 by fitting or welding. FIG. 4 shows a perspective view of the filter 21 , the extension 22 , and the filter mounting frame 57 . Although the partially cutaway filter 21 is shown in FIG. 4 , in reality, the filter 21 is configured to surround the filter mounting frame 57 .

The filter 21 is made of a metal material. In order to reduce unevenness of the filter 21 , a film of resin or the like is formed on the metal surface of the filter 21 . Alternatively, the metal surface of the filter 21 is subjected to grinding treatment. Thus, by reducing the irregularities of the filter 21, the flow of air becomes smooth. Since the flow of air becomes smoother, the separation efficiency of air and dust improves. Furthermore, it is possible to suppress dust from adhering to the filter 21 . In addition, by subjecting the filter 21 to antibacterial treatment, the filter 21 can be kept clean.

The air and dust sucked in from the suction tool 5 are sucked in from the first opening 17 provided in the dust box 8 through the suction port 1a. That is, the air containing the dust is introduced into the dust box 8 as indicated by the arrow A in FIG. 3 . The sucked air flows into the cyclone space 31 formed between the inner peripheral surface of the outer wall 54 of the dust box 8 and the outer peripheral surface of the filter 21 . The inflowing air is swirled along the cyclone space 31 . Using the centrifugal force generated by the rotation of the air, the dust mainly flocculent dust and the air containing fine dust are centrifugally separated. Since the dust is heavier than air, the dust is separated outside the rotation, that is, on the outer peripheral side of the cyclone space 31 . The separated dust falls downward through the dust collecting path 32 formed between the outer peripheral surface of the extension portion 22 and the inner peripheral surface of an inclined portion 53 (described later) of the dust box 8 . Thereafter, the dust falls and accumulates in the dust storage space 52 provided below the filter 21 .

Here, the outer diameter R4 of the dust accumulation space 52 is larger than the outer diameter R3 of the cyclone space 31 . The radial width L1 of the cyclone space 31 is greater than the radial width L2 of the dust collection passage 32. The dust box 8 has an inclined portion 53 that expands corresponding to the umbrella shape of the extension portion 22 . The upper end of the extension portion 22 is located higher than the inclined portion 53 . In addition, the lower end of the extension portion 22 is located below the inclined portion 53 . According to this structure, the flow velocity of the air in the dust collecting passage 32 becomes fast. As a result, a force for pushing the dust by the air flow is generated from the cyclone space 31 toward the dust storage space 52 . This force can prevent the dust accumulated in the dust accumulation space 52 from flying toward the cyclone space 31 . Since the dust does not return to the cyclone space 31 , dust such as hair and fluffy dust does not adhere to the filter 21 . Thereby, the dust collection efficiency of the cyclone dust collector 7 improves. In addition, even when the lower end of the extension part 22 is located near the lower part of the inclined part 53, the same effect can be obtained.

In addition, the inclined portion 53 has a structure in which a top plate is formed above the vicinity of the outer periphery of the dust storage space 52 . According to this configuration, the dust mainly composed of fluffy dust accumulated in the dust accumulation space 52 is less likely to return to the cyclone space 31 . That is, the dust collection efficiency of the cyclone dust collector 7 improves.

Here, if the inclined surface 58 of the extension part 22 and the inclined part 53 of the dust box 8 are formed substantially parallel, the turbulence of the flow at the time of air rotation can be reduced. Thereby, it is possible to further suppress the dust from returning from the dust accumulation space 52 to the cyclone space 31 . In addition, thereby, it is also possible to prevent dust from clogging the dust collection passage 32 . In addition, when the position of the upper end of the extension portion 22 is changed upward or downward while maintaining the substantially parallel state, the radial width L2 of the dust collecting passage 32 can be gradually narrowed downward. Or gradually widen as you go down. In this way, the degree of freedom in design increases. On the other hand, if the inclined portion 53 is formed such that the radial width L2 of the dust collecting passage 32 gradually expands toward the dust storage space 52 , the inclination of the inclined portion 53 becomes gentle. Thereby, the height of the cyclone dust collector 7 can be reduced. That is, the cyclone dust collector 7 becomes compact. Conversely, if the inclined portion 53 is formed so that the radial width L2 of the dust collecting passage 32 gradually becomes narrower toward the dust storage space 52 , the force for pushing the dust increases. Thereby, it is possible to further suppress the dust in the dust storage space 52 from returning to the cyclone space 31 .

The outer diameter R3 of the cyclone space 31 is larger than the maximum outer diameter R2 of the extension part 22 . According to this structure, even when the filter 21 and the extension part 22 are comprised as one component, the filter 21 and the extension part 22 can be inserted and removed from the upper direction of the dust box 8. FIG. That is, the assemblability of dust box 8 improves.

In addition, the user can observe the inside by configuring at least a part of the dust box 8 or at least a part of the extension part 22 with a transparent material. According to this configuration, since the amount of dust accumulated in the umbrella-shaped interior of the dust collection storage space 52 and the extension portion 22 can be confirmed, the user can easily judge when to dump the garbage. Moreover, if both the dust box 8 and the extension part 22 are comprised with a transparent material, it becomes easy to see.

In addition, a flange 59 extending parallel to the axial direction of the dust accumulation space 52 is formed at an end portion of the extension portion 22 . That is, the radial width L3 of the portion of the dust collecting passage 32 that faces the flange 59 is constant. According to this structure, air flows into the dust accumulation space 52 vertically with respect to the dust accumulated in the dust accumulation space 52 . Thereby, the dust in the dust storage space 52 is efficiently compressed, and it suppresses returning to the cyclone space 31. Therefore, the dust collection efficiency of the cyclone dust collector 7 improves.

The dust centrifuged in the cyclone space 31 has been described above. Next, air from which dust has been removed by centrifugal separation in the cyclone space 31 will be described. This air contains fine dust that has not been centrifuged. The fine dust passes through the filter 21 and is then captured by the pleat-shaped subsequent filter 23 provided above the filter 21 . That is, fine dust is separated by the filter 23 of the next stage, and only the air free of dust is passed through the filter 23 of the next stage. As shown by reference sign B in FIG. 3 , air free of fine dust is discharged from the second opening 16 and sucked by the electric blower 6 .

The dust captured by the subsequent filter 23 and accumulated in the latter filter 23 is shaken off downward by the dust removal unit 24 provided above the subsequent filter 23 while the electric blower 6 is stopped. The structure and operation of the dust removal unit 24 will be described below. The fine dust shaken down passes through the space inside the filter mounting frame 57 and accumulates in the inner cylinder 33 provided below the filter 21 .

An inclined portion 33 a is formed on the upper portion of the inner cylinder 33 . The fine dust shaken down is guided to the lower part of the inner cylinder 33 by the inclined part 33a. A backstop 55 is formed inside the inner cylinder 33 . With the backstop 55 , even if the cyclone dust collector 7 is turned upside down, the dust accumulated in the inner tube 33 will not return to the filter 23 of the next stage. That is, the backstop 55 prevents the fine dust from adhering to the filter 23 of the next stage again. In addition, the inner cylinder 33 communicates with the filter 21 . In addition, the opening 33 b at the lower end of the inner cylinder 33 is isolated from the dust storage space 52 by the seal 30 provided on the cover 9 .

A sealing member 26 is installed on the outer periphery of the upper part of the filter 23 of the subsequent stage. In addition, a packing 27 is attached to the outer periphery of the lower portion of the filter 23 of the subsequent stage. The sealing member 26 and the sealing member 27 maintain airtightness with respect to the filter installation frame 57 and have a vibration isolation effect.

The outer diameter of the portion of the filter mounting frame 57 higher than the filter 21 is larger than the outer diameter R1 of the filter 21 and larger than the outer diameter R3 of the cyclone space 31 . The filter mounting frame 57 is inserted from above the dust box 8 , and held by being pressed by the packing 27 and the holding rib 56 .

The outer diameter of the latter filter 23 is larger than the outer diameter R1 of the filter 21 . According to this shape, the circulation resistance of air is reduced. Furthermore, due to this shape, the outer diameter of the upper part of the dust box 8 is made larger than the outer diameter of the outer wall 54 constituting the outer periphery of the cyclone space 31 . That is, the dust box 8 has a shape that is thinner near the center in the axial direction and thicker at both ends and thinner in the middle.

Next, dust removal by the subsequent filter 23 will be described. As shown in FIGS. 5 and 6 , the dust removal unit 24 is composed of a shaft 43 , a dust removal plate 44 connected by the shaft 43 , and a rail 41 . Furthermore, the motor unit 25 is constituted by a motor 40 , a crankshaft 37 mounted on the rotation shaft of the motor 40 , a connecting rod 38 , and a linear vibrator 39 . The crankshaft 37, the connecting rod 38, and the linear vibrator 39 are sequentially connected. According to this structure, the rotation of the motor 40 is converted into the vibration of the linear vibrator 39 (vibration in the left-right direction in FIG. 6 ). Since the linear oscillator 39 is connected to the rail 41, the dust removal plate 44 vibrates left and right. The dust accumulated on the filter 23 of the next stage is shaken off downward by the left and right vibrations of the dust removal plate 44 .

The motor unit 25 is covered by a motor cover 35 and a motor case 36 , and is mounted in a case 46 . A circuit board 49 for driving the motor 40 is installed in the case 46 . The capacitor 48 is arranged on the circuit board 49 . The capacitor 48 is charged by a charging device (not shown) provided on the vacuum cleaner main body 1 via the terminal 19 shown in FIG. 3 . The electric energy charged in the capacitor 48 is made to flow into the motor 40 by the switch 34, and the motor 40 is rotated. According to this structure, while the electric blower 6 stops, the dust removal part 24 operates.

In addition, the housing 46 is connected to the cover 11 by the inner wall 45 and a screw member or the like. The rail 41 is sandwiched and held by the housing 46 and the rail holding portion 42 provided on the inner wall 45 .

In addition, although the case where the dust box 8 and the extension part 22 are cylindrical shape was demonstrated, as shown in FIG.

Claims (6)

1. A cyclone dust collector, characterized in that it comprises: Cylindrical dust box; The first opening is used to introduce air and dust together into the above-mentioned dust box; a cylindrical filter arranged coaxially with the dust collecting box inside the dust collecting box; a cyclone space formed between the inner peripheral surface of the dust collecting box and the outer peripheral surface of the filter; A cylindrical dust accumulation space is located below the filter; an extension portion formed in an umbrella shape extending from a lower portion of the filter toward the dust accumulation space; The second opening is used to discharge the air from the above-mentioned dust box to the outside, The dust box has an inclined portion extending corresponding to the umbrella shape of the extending portion, A dust collection passage is formed between the outer peripheral surface of the extension part and the inner peripheral surface of the inclined part of the dust box; The upper end of the extension part is located higher than the slope part. 2. The cyclone dust collector according to claim 1, characterized in that, An outer peripheral surface of the extending portion is parallel to an inner peripheral surface of the inclined portion. 3. The cyclone dust collecting device according to claim 1, characterized in that, The maximum outer diameter of the extension part is smaller than the outer diameter of the cyclone space. 4. The cyclone dust collecting device according to claim 1, characterized in that, At least a part of the dust box is transparent. 5. The cyclone dust collecting device according to claim 1, characterized in that, At least a part of the extension part is transparent. 6. An electric vacuum cleaner, characterized in that it comprises: electric blower for sucking air; A suction port for sucking air together with dust driven by the aforementioned electric blower; The cyclone dust collector according to any one of claims 1 to 5, wherein the dust and air sucked in from the suction port are introduced through the first opening.

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