JP-7857259-B2 - Dust collectors and vacuum cleaners

JP7857259B2JP 7857259 B2JP7857259 B2JP 7857259B2JP-7857259-B2

Inventors

品川直子

Assignees

美的集団股▲フン▼有限公司

Dates

Publication Date: 20260512
Application Date: 20230901

Claims (3)

A first separation unit that centrifugally separates dust from dust-containing air, A first collection unit is located on one side in the axial direction of the first separation unit with respect to the first separation unit, and collects the dust separated in the first separation unit, A second separation unit is located on the opposite side of the axial direction of the first separation unit, with respect to the first separation unit, and separates dust from the air that has passed through the first separation unit by centrifugal force. It comprises a second collection section located between the first separation section and the second separation section, which collects the dust separated in the second separation section, The second separation unit consists of a cylindrical section that discharges the separated dust from one end and the air from which the dust has been separated from the other end. Multiple cylindrical portions are arranged so as to surround a reference line that is in approximately the same direction as the central axis of the first separation portion. The other end of the cylindrical portion has an exhaust pipe portion that demarcates the exhaust port of the second separation portion to the downstream end and discharges air. The dust collector is characterized in that, when viewed in a cross-section including the central axis of the exhaust pipe , the inner circumferential surface on the side opposite to the reference line is a straight line substantially parallel to the reference line, the inner circumferential surface on the side of the reference line is inclined to approach the reference line from one end to the other end, the inner circumferential surface is a straight line from the upstream end (one end) to the downstream end (the other end), the cross-section perpendicular to the central axis is circular, and the cross-sectional area of the elliptical shape perpendicular to the reference line at the downstream end (the other end) is larger than the cross-sectional area of the elliptical shape perpendicular to the reference line at the upstream end (one end).
The dust collector according to claim 1, characterized in that the outer diameter of the second accumulation section is less than or equal to the maximum outer diameter of the first separation section or the first accumulation section.
A vacuum cleaner characterized by comprising the dust collection device described in claim 1 or 2.

Description

Embodiments of the present invention relate to a dust collection device having a plurality of separation and accumulation sections, and a vacuum cleaner equipped therewith. Conventionally, dust collection devices used in vacuum cleaners and the like are known to include a first separation unit that centrifugally separates coarse dust from dust-containing air, and a second separation unit that centrifugally separates fine dust from the air that has passed through the first separation unit. The separated coarse and fine dust are collected separately inside cup-shaped containers. For example, a known configuration exists where a fine dust collection section is located at the center of the lower end of a coarse dust collection section. In this configuration, the fine dust collection section must be narrower than the cylindrical filter positioned at the center of the upper end of the coarse dust collection section, forming part of the first separation section. Furthermore, in order to allow fine dust to fall to the lower end of the coarse dust collection section, the fine dust collection section must be elongated. This can lead to fine dust adhering to the inner wall, causing clogging of the fine dust collection section and the generation of unpleasant odors. In contrast, for example, a configuration is known in which a fine dust collection section is set up around the upper end of a coarse dust collection section. While clogging of the fine dust collection section is less likely in this configuration, in order to ensure ventilation from the first separation section to the second separation section, it is preferable to form the second separation section and the fine dust collection section outward from the swivel cylinder at the center of rotation of the first separation section, which tends to increase the outer diameter. Patent No. 6869036Japanese Patent Publication No. 2014-14452Japanese Patent Publication No. 2022-135553 This is an enlarged cross-sectional view showing the second separation section of a dust collector according to one embodiment.This is a cross-sectional view showing the disassembled state of the dust collector shown above.This is a perspective view showing a part of the dust collection device shown above.This is a cross-sectional view showing a further disassembled version of the dust collector shown in Figure 2.This is a cross-sectional view showing the assembled state of the dust collector shown above.A perspective view showing the assembled state of the dust collector shown above.This is a perspective view showing a vacuum cleaner equipped with the same dust collection device. The following describes one embodiment with reference to the drawings. In Figures 5 and 6, 1 represents a dust collector. The dust collector 1, also called a dust collection cup, separates and collects dust from dust-containing air. The dust collector 1 has a cylindrical, preferably cylindrical, appearance, with its axial direction as the longitudinal direction. While the dust collector 1 can be applied to various electrical devices at various angles, in this embodiment, for clarity, the direction of arrow D in the figures, i.e., one end or side of the longitudinal direction of the dust collector 1, will be described as the downward direction, and the direction of arrow U, i.e., the other end or side of the longitudinal direction of the dust collector 1, will be described as the upward direction. In other words, the up and down directions in this embodiment are merely for explanatory purposes and do not limit the up and down directions in the usage state or orientation of the dust collector 1 in electrical equipment. The dust collector 1 consists of multiple components. Preferably, the dust collector 1 consists of multiple components that are detachable from one another. Hereafter, the term "detachable" refers to the ability of a standard user to attach and detach components manually without using tools or excessive external force that could damage any part of the components. In this embodiment, the dust collector 1 consists of multiple components that are detachable from one another in the longitudinal direction. In the illustrated example, the dust collector 1 consists of a first member 2, a second member 3, and a third member 4. While the first member 2, second member 3, and third member 4 may each be further subdivided into smaller components, in the assembled state of the dust collector 1 of this embodiment, the first member 2, second member 3, and third member 4 are generally described as components used as a single, integrated unit. In this embodiment, the dust collector 1 is assembled with the third member 4 sandwiched between the first member 2 and the second member 3. Hereinafter, the assembled state or usage state of the dust collector 1 refers to the state in which the first member 2, second member 3, and third member 4 are assembled integrally with each other. Furthermore, the dust collector 1 has mult