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JP-7854876-B2 - vacuum cleaner

JP7854876B2JP 7854876 B2JP7854876 B2JP 7854876B2JP-7854876-B2

Inventors

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

Assignees

  • シャープ株式会社

Dates

Publication Date
20260507
Application Date
20220701

Claims (12)

  1. The device comprises a housing, a cylindrical electric blower cover provided inside the housing, and an electric blower housed inside the electric blower cover. The electric blower cover has a main cylindrical portion arranged around the electric blower so as to support the outer frame of the electric blower via a vibration-damping member, an intake portion provided upstream of the main cylindrical portion in the direction of the airflow generated when the electric blower is driven, an exhaust portion provided downstream of the main cylindrical portion in the direction of the airflow, and a tapered cylindrical portion provided between the main cylindrical portion and the exhaust portion. The cross-sectional area of the outlet portion is smaller than the cross-sectional area of the main cylindrical portion, and the cross-sectional area of the tapered cylindrical portion decreases from the upstream side to the downstream side in the direction of the airflow . The electric blower cover is formed along the direction of the axis of the electric blower and further has an exhaust pipe portion having the exhaust port portion, The electric blower cover is provided with the main cylindrical portion, the tapered cylindrical portion, and the discharge cylindrical portion in that order toward one side in the direction of the axis, and houses the electric blower such that one side in the direction of the axis is open to the electric blower. Vacuum cleaner.
  2. The electric blower cover includes an upstream cover that constitutes the intake port and the main cylindrical portion, and a downstream cover that constitutes the tapered cylindrical portion and the exhaust port. The upstream cover has an open end on the downstream side of the main cylindrical portion in the direction of the airflow, The downstream cover has an opposing open end on the upstream side of the tapered cylindrical portion in the direction of the airflow that can be connected to the open end, The vacuum cleaner according to claim 1, wherein the open end and the opposing open end are connected via a sealing vibration-damping member.
  3. The vacuum cleaner according to claim 2, wherein the downstream cover has a connecting cylindrical portion between the opposing open end and the tapered cylindrical portion, having a cross-sectional area equal to that of the opposing open end.
  4. The vacuum cleaner according to claim 2 or 3 , wherein the downstream cover has the discharge pipe portion between the tapered cylindrical portion and the discharge port portion.
  5. The vacuum cleaner according to claim 4, wherein the discharge cylinder portion has a cross-sectional area equivalent to that of the discharge port portion.
  6. The vacuum cleaner according to claim 4, wherein the downstream cover has a flow straightening section that straightens the airflow in the range from the downstream end of the tapered cylindrical section in the direction of the airflow to the discharge port.
  7. The vacuum cleaner according to claim 6, wherein the flow straightening section is provided at a position including the boundary between the tapered cylindrical section and the discharge cylinder section, within the range from the downstream end of the tapered cylindrical section to the upstream end of the discharge cylinder section in the direction of the airflow.
  8. The vacuum cleaner according to claim 6, wherein the rectifier section is formed in a grid or fin shape.
  9. The vacuum cleaner according to claim 2 or 3 , wherein the downstream cover has sound-absorbing material on the inner surface of the tapered cylindrical portion.
  10. The vacuum cleaner according to claim 2 or 3, wherein at least one of the upstream cover and the downstream cover is made of metal or is covered with metal.
  11. The vacuum cleaner according to claim 2 or 3, wherein the upstream cover or the downstream cover has a lead wire opening for passing the lead wires of the electric blower, and a vibration-damping member provided in the lead wire opening.
  12. The electric blower further comprises a substrate provided at the downstream end in the direction of the airflow, The substrate faces the direction of the airflow, and the downstream surface of the substrate faces the outlet portion. The vacuum cleaner according to any one of claims 1 to 3, wherein when the contour of the discharge port is projected onto the downstream surface of the substrate, the contour fits within the downstream surface.

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 an electric centrifugal blower aimed at improving noise reduction. This electric centrifugal blower comprises a motor, an impeller mounted on the output shaft of the motor, a casing (including a cylindrical outer frame and circular first and second brackets) that houses the motor and impeller to hold the motor, and guide vanes and a rectifier plate provided on the outer circumference of the motor. The casing has an intake port provided on the upstream side in the direction of the airflow generated when the motor is driven, and an outlet port provided downstream of the motor. In this electric centrifugal blower, the space between the casing and the impeller and the space between the casing and the motor serve as ventilation passages. Japanese Patent Application Publication No. 8-93683 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 fourth 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 left-side cross-sectional view of the electric blower cover of Modification 1 of the first embodiment, which houses the electric blower.This is a schematic left-side cross-sectional view of the electric blower cover of a modified example 2 of the first embodiment, which houses the electric blower.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. 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 embodimen