Cyclonic separation device and application thereof

Patent metadata

Field	Value
Publication number	US-12059120-B2
Application number	US-201916967732-A
Country	US
Kind code	B2
Filing date	Feb 1, 2019
Priority date	Feb 7, 2018
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A cyclonic separation device and a vacuum cleaner including the cyclonic separation device are disclosed. The cyclonic separation device includes a housing and a cyclonic separation device. The cyclonic separation device is provided in the housing to allow dirt in a dust-containing airflow to be separated. The cyclonic separation device includes a first-stage cyclone separator and second-stage cyclone separators located downstream of the first-stage cyclone separator in a flow direction of the airflow. The second-stage cyclone separators surround the first-stage cyclone separator. The first-stage cyclone separator includes an air guide channel and a first-stage cyclone channel surrounding a part of the air guide channel. The dust-containing airflow enters, from the air guide channel, the first-stage cyclone channel for cyclonic separation and then enters the second-stage cyclone separators again through the air guide channel.

First claim

What is claimed is:

1. A cyclonic separator, comprising:
a housing; and
a cyclonic separation device provided in the housing to allow dirt in a dust-laden airflow to be separated, the cyclonic separation device comprising a first-stage cyclone separator and a plurality of second-stage cyclone separators located downstream of the first-stage cyclone separator in a flow direction of airflow, the plurality of second-stage cyclone separators surrounding the first-stage cyclone separator; wherein
the first-stage cyclone separator comprises an air guide channel and a first-stage cyclone channel surrounding a part of the air guide channel, and the dust-laden airflow enters, from the air guide channel, the first-stage cyclone channel for cyclonic separation and then enters the second-stage cyclone separators through the air guide channel;
the air guide channel comprises a first air outlet channel and an air inlet channel spaced up and down and coaxially arranged, the first-stage cyclone channel surrounds the first air outlet channel, and in the flow direction of the airflow, the first-stage cyclone channel is located between the air inlet channel and the first air outlet channel; and
after entering the first-stage cyclone channel through the air inlet channel and experiencing the cyclonic separation, the dust-laden airflow enters the second-stage cyclone separators through the first air outlet channel;
wherein the first-stage cyclone separator comprises:
a first cyclone with a tapered wall and having a cavity with an open top; and
a separating member provided in the first cyclone and defining the first air outlet channel; wherein
the first-stage cyclone channel is defined between the separating member and the first cyclone, and the separating member is provided with a plurality of through-holes arranged at intervals to make the first air outlet channel communicated with the first-stage cyclone channel;
The at least part of the air guide channel extends linearly, and the first-stage cyclone channel extends spirally along a length direction of the at least part of the air guide channel;
the cyclonic separation device further comprises an air flow-by opening located between the first-stage cyclone separator and the plurality of second-stage cyclone separators, and the plurality of second-stage cyclone separators surround the first-stage cyclone separator; and
after entering the first-stage cyclone channel through the air guide channel and experiencing the cyclonic separation, part of the dust-laden airflow enters the second-stage cyclone separators through the air guide channel, and another part of the dust-laden airflow enters the second-stage cyclone separators through the air flow-by opening, wherein a filter screen is provided at the air flow-by opening.

2. The cyclonic separator according to claim 1 , wherein a cross-sectional contour line of at least a part of the first cyclone is composed of multiple tangent arcs with unequal radii; or a cross-sectional contour line of at least a part of the first cyclone forms an ellipse or a circle.

3. The cyclonic separator according to claim 1 , wherein the first cyclone comprises a cyclone casing, the cyclone casing has a bottom wall and a side peripheral wall to define the cavity, the bottom wall of the cyclone casing has a mounting hole, and the side peripheral wall exhibits a curved cross-sectional shape,
wherein the cyclone casing has a guide surface therein, and the guide surface extends spirally upward along a central axis of the mounting hole.

4. The cyclonic separator according to claim 3 , wherein an inner surface of the bottom wall of the first cyclone forms at least a part of the guide surface.

5. The cyclonic separator according to claim 3 , further comprising:
an air guiding member provided in the cyclone casing, and defining, together with the bottom wall of the cyclone casing, a dust-throwing opening in communication with the mounting hole, an upper surface of the air guiding member forming at least a part of the guide surface.

6. The cyclonic separator according to claim 5 , wherein an outer peripheral edge of the air guiding member is connected to the side peripheral wall of the cyclone casing, and an orthographic projection of an inner peripheral edge of the air guiding member on the bottom wall of the cyclone casing coincides with a hole edge of the mounting hole.

7. The cyclonic separator according to claim 5 , wherein the air guiding member further has an air-throw deflection surface, and the air-throw deflection surface forms an arc surface gradually extending to the dust-throwing.

8. The cyclonic separator according to claim 1 , wherein the first cyclone further comprises an air inlet duct,
the air inlet duct is connected to a bottom of a cyclone casing and defines the air inlet channel, and
the air inlet duct has a cross-sectional area smaller than a cross-sectional area of the cyclone casing.

9. The cyclonic separator according to claim 1 , wherein the separating member is provided with an air guide partition plate therein to divide an inner cavity of the separating member into an upper part and a lower part,
a side wall of the separating member below the air guide partition plate is provided with a vent in communication with the first-stage cyclone channel, and
the plurality of through-holes are provided in the side wall of the separating member above the air guide partition plate.

10. The cyclonic separator according to claim 1 , wherein each of the second-stage cyclone separators comprises a conical second-stage cyclone channel, and after experiencing the cyclonic separation of the first-stage cyclone separator, the airflow enters the conical second-stage cyclone channels to undergo cyclonic separation again,
wherein the air guide channel is located on a center line of the first-stage cyclone separator and the plurality of second-stage cyclone separators,
wherein each of the conical second-stage cyclone channels is in communication with the first-stage cyclone channel through an air flow-by channel, and each of the air flow-by channels is tangent to a corresponding conical second-stage cyclone channel.

11. The cyclonic separator according to claim 1 , wherein the plurality of second-stage cyclone separators are arranged on an outer periphery of the first-stage cyclone separator, and a gap is left between each said second-stage cyclone separator and the first-stage cyclone separator,
a first dust-collecting chamber and a second dust-collecting chamber are defined in a bottom of the housing, the second dust-collecting chamber is spaced apart from the first dust-collecting chamber and is arranged on an outer periphery of the first dust-collecting chamber, and the first dust-collecting chamber is configured to receive dirt separated by the first-stage cyclone separator, while the second dust-collecting chamber is configured to receive dirt separated by the second-stage cyclone separators, wherein the plurality of second-stage cyclone separators are symmetrically arranged with respect to the first-stage cyclone separator, and at least two second dust-collecting chambers are provided and arranged symmetrically on both opposite sides of the first dust-collecting chamber.

12. The cyclonic separator according to claim 1 , wherein the cyclonic separation device further comprises an air duct cover plate connected between the first-stage cyclone separator and the plurality of second-stage cyclone separators, and the air flow-by opening is provided in the air duct cover plate and located on an outer periphery of the air guide channel.

13. The cyclonic separator according to claim 12 , where

Assignees

• Jiangsu Midea Cleaning Appliances Co Ltd
• Midea Group Co Ltd

Inventors

• Dai Jun
• Bao Hui
• Fang Jie
• Kang Donghwy

Classifications

• B04C2009/002

  with external filters · CPC title

• B04C9/00

  Combinations with other devices, e.g. fans, {expansion chambers, diffusors, water locks}(with filters B01D50/00) · CPC title

• B04C5/28

  for parallel flow · CPC title

• B04C5/26

  for series flow · CPC title

• B04C5/185

  Dust collectors · CPC title