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JP-7854877-B2 - vacuum cleaner

JP7854877B2JP 7854877 B2JP7854877 B2JP 7854877B2JP-7854877-B2

Inventors

  • 中川 敦史
  • 佐藤 隼人
  • 寺邊 裕希
  • 大西 裕二

Assignees

  • シャープ株式会社

Dates

Publication Date
20260507
Application Date
20220701

Claims (11)

  1. The system comprises a housing having an exhaust port, a cylindrical electric blower cover provided inside the housing, and an electric blower housed inside the electric blower cover. The electric blower cover has an intake port provided on the upstream side in the direction of the airflow generated by the electric blower, and an exhaust port provided downstream of the intake port in the direction of the airflow. The housing has a wall surface facing the outlet, The exhaust port is located on the intake port side of the discharge port, The airflow discharged into the housing from the exhaust port collides with the opposing wall surface, folds back toward the intake port, and is exhausted to the outside through the exhaust port . The exhaust port is formed on one side in a first direction perpendicular to the axis of the electric blower, The opposing wall surface is inclined such that it moves away from the discharge port as it moves toward one side in the first direction. Electric vacuum cleaner.
  2. The electric blower cover is positioned such that a space is formed between its outer surface and the inside of the housing, and when the space is divided into a first spatial region and a second spatial region by a plane passing through the central axis of the cylindrical shape, a first spatial region and a second spatial region wider than the first spatial region are formed, as is the case when the space is positioned within the housing. The vacuum cleaner according to claim 1, wherein when the first spatial region and the second spatial region are separated by the plane such that the volume of the second spatial region is greater than the volume of the first spatial region, the exhaust port is positioned to open at least into the second spatial region.
  3. The exhaust port is also positioned to open into the first spatial region, The vacuum cleaner according to claim 2, wherein when the first spatial region and the second spatial region are separated by the plane such that the difference between the volume of the first spatial region and the volume of the second spatial region is maximized, the opening area of the exhaust port opening into the second spatial region is larger than the opening area of the exhaust port opening into the first spatial region.
  4. The vacuum cleaner according to claim 2, wherein the opposing wall surface is inclined so that the airflow discharged from the outlet is guided into the second spatial region.
  5. The vacuum cleaner according to claim 2, wherein a canopy is provided over the discharge port so that the airflow discharged from the discharge port collides with the opposing wall surface at an oblique angle and is directed toward the second spatial region.
  6. The electric blower cover has a main cylindrical portion arranged around the electric blower to support the electric blower, The vacuum cleaner according to any one of claims 1 to 5, wherein the cross-sectional area of the discharge port is smaller than the cross-sectional area of the main cylinder.
  7. The electric blower cover has a tapered cylindrical portion provided between the main cylindrical portion and the discharge port portion, The vacuum cleaner according to claim 6, wherein the cross-sectional area of the tapered cylindrical portion decreases from the upstream side to the downstream side in the direction of the airflow.
  8. The vacuum cleaner according to claim 7, wherein an internal sound-absorbing material is provided on the inner surface of the tapered cylindrical portion.
  9. The vacuum cleaner according to claim 8, wherein an external sound-absorbing material capable of passing through the airflow discharged from the discharge port is provided around the discharge port.
  10. The vacuum cleaner according to any one of claims 1 to 5, wherein an external sound-absorbing material that allows the airflow discharged from the outlet to pass through is provided around the outlet.
  11. The vacuum cleaner according to claim 7, wherein the tapered cylindrical portion has a second exhaust port with an opening area smaller than the opening area of the discharge port.

Description

This invention relates to an electric vacuum cleaner. A vacuum cleaner generates suction power by driving an electric blower located inside the casing to suck up and remove dust from the surface being cleaned, but this process generates noise from the electric blower. Patent Document 1 discloses a vacuum cleaner aimed at improving noise reduction. Japanese Patent Application Publication No. 5-31050 This is a perspective view of a vacuum cleaner according to the first embodiment of the present invention.This is a partially perspective view of the vacuum cleaner body of the first embodiment, seen from the right rear.This is a left cross-sectional view of the vacuum cleaner body of the first embodiment.This is an enlarged cross-sectional view of the left side portion of the vacuum cleaner body of the first embodiment.This is a cross-sectional view taken along the line I-I in Figure 3.This is a cross-sectional view taken along the line II-II in Figure 3.This is a cross-sectional view taken along the line III-III in Figure 3.This is a cross-sectional view taken along the line IV-IV in Figure 3.This is a perspective view of the electric blower cover of the first embodiment, taken from the left rear.This is a left-side cross-sectional view of the electric blower cover of the first embodiment, which houses the electric blower.This is a cross-sectional view taken along the line V-V in Figure 4.This is a perspective view of the first vibration-damping member of the first embodiment.This is a perspective view of the downstream cover in the electric blower cover of the first embodiment.This is a perspective view of the electric blower according to the first embodiment.This is a perspective view of the second vibration-damping member of the first embodiment.This is a perspective view of one half of the second vibration-damping member shown in Figure 15A, cut in half.This is an explanatory diagram showing a third vibration-damping member provided in the lead wire opening of the downstream cover of the first embodiment.Figure 16 is a perspective view of the fourth vibration-damping member.This is a schematic left-side cross-sectional view of the electric blower cover of the second embodiment, which houses the electric blower.This is a schematic left-side cross-sectional view of the electric blower cover of the third embodiment, which houses the electric blower.This is a schematic left-side cross-sectional view of the electric blower cover of the fourth embodiment, which houses the electric blower.This is a schematic left-side cross-sectional view of the electric blower cover of the fifth embodiment, which houses the electric blower.This is a schematic left-side cross-sectional view of the electric blower cover of the sixth embodiment, which houses the electric blower. The invention will be described in further detail below with reference to the drawings. Note that the following description is illustrative in all respects and should not be interpreted as limiting the invention. (First Embodiment) Figure 1 is a perspective view of a vacuum cleaner according to the first embodiment of the present invention. The first embodiment of the vacuum cleaner 1 shown in Figure 1 is a stick-type cordless vacuum cleaner comprising a vacuum cleaner body 10, a suction port 60, and an extension tube 90 that detachably connects the vacuum cleaner body 10 and the suction port 60. This vacuum cleaner 1 can also be used as a handheld type by directly connecting the suction port 60 to the vacuum cleaner body 10. Since this electric vacuum cleaner 1 has a distinctive feature in its main body 10, the following will describe the configuration of the main body 10, and the description of the suction port 60 and extension tube 90 will be omitted. As shown in Figure 1, the vacuum cleaner body 10 includes a suction device 20 and a dust collector 50 that is detachably attached to the suction device 20. Figure 2 is a partially perspective view of the vacuum cleaner body of the first embodiment, viewed from the right rear. Figure 3 is a left cross-sectional view of the vacuum cleaner body of the first embodiment. For convenience in explaining the configuration of the vacuum cleaner body 10, the directions as seen from a user holding the vacuum cleaner body 10 horizontally are indicated by arrows in Figures 2, 3, etc., as the front, back, left, right, up, and down directions of the vacuum cleaner body 10. As shown in Figures 2 and 3, the suction device 20 comprises a housing 21, a cylindrical electric blower cover 30 provided inside the housing 21, an electric blower 40 housed inside the electric blower cover 30, and a battery 11 detachably attached to the housing 21. The housing 21 has an electrical component storage section 21a for housing electrical components such as the electric blower cover 30 containing the electric blower 40 and a circuit board 41 constituting the control unit, a handle section 21b connected to the rear end of the electrical compon