Cyclone dust-separating apparatus

Claim 2

A cyclone dust-separating apparatus comprising: a cyclone body having a cyclone chamber and a dirt-collecting chamber enclosing an outer circumference of the cyclone chamber; an upper cover disposed on an upper end of the cyclone body to form a connection passage between the cyclone chamber and the dirt-collecting chamber; and a backflow prevention protrusion formed on an inner wall of the upper cover, the backflow protrusion preventing dirt collected in the dirt-collecting chamber from flowing back to the cyclone chamber.

Claim 3

The cyclone dust-separating apparatus as claimed in claim 1 , further comprising: an air discharge pipe disposed on a bottom of the cyclone body; an air inflow pipe disposed in a lower portion of the cyclone body to penetrate through an inner wall and an outer wall of the cyclone body; and a guide disposed in the cyclone chamber to guide air drawn in through the air inflow pipe.

Claim 4

The cyclone dust-separating apparatus as claimed in claim 2 , wherein the backflow prevention protrusion, the shape of which resembles a cylinder, has a larger diameter D 2 than a diameter Dl of the cyclone chamber.

Claim 5

The cyclone dust-separating apparatus as claimed in claim 3 , wherein a height H 3 of the backflow prevention protrusion is smaller than a height H 4 of the connection passage.

Claim 6

A cyclone dust-separating apparatus comprising: a cyclone body including a circular inner wall, an outer wall spaced from the inner wall by a predetermined distance, a bottom connecting the inner wall and the outer wall, and an upper wall connecting with an upper end of the outer wall; an air inflow pipe penetrating through the outer wall and the inner wall of the cyclone body; and an air discharge pipe penetrating through the bottom of the cyclone body.

Claim 7

A cyclone dust-separating apparatus comprising: a cyclone body including a circular inner wall, an outer wall spaced from the inner wall by a predetermined distance, a bottom connecting the inner wall and the outer wall, and an upper wall connecting with an upper end of the outer wall; an air inflow pipe penetrating through the outer wall and the inner wall of the cyclone body; and an air discharge pipe penetrating through the bottom of the cyclone body.

Claim 8

The cyclone dust-separating apparatus as claimed in claim 5 , further comprising a backflow prevention protrusion protruding downward from a lower surface of the upper wall, wherein the backflow prevention protrusion has a larger diameter than that of the circular inner wall.

Claim 9

A cyclone dust-separating apparatus comprising: a bottom wall; an outer wall extending upward from said bottom wall to a first height; an inner wall being spaced from said outer wall, said inner wall extending upward from said bottom wall to a second height, said second height being smaller than said first height; an upper cover covering said inner and outer walls so that a connection passage having a fourth height is defined between said inner wall and said upper cover; and a backflow prevention protrusion extending downward from said upper cover a third height, said third height being smaller than said fourth height.

Claim 10

A cyclone dust-separating apparatus comprising: a bottom wall; an outer wall extending upward from said bottom wall to a first height; an inner wall being spaced from said outer wall, said inner wall extending upward from said bottom wall to a second height, said second height being smaller than said first height; an upper cover covering said inner and outer walls so that a connection passage having a fourth height is defined between said inner wall and said upper cover; and a backflow prevention protrusion extending downward from said upper cover a third height, said third height being smaller than said fourth height.

Claim 11

The cyclone dust-separating apparatus as claimed in claim 7 , wherein said inner wall has a first diameter and said backflow prevention protrusion has a second diameter, said second diameter being larger than said first diameter.

Claim 12

The cyclone dust-separating apparatus as claimed in claim 7 , further comprising an air inflow pipe penetrating through said outer and inner walls.

Claim 13

The cyclone dust-separating apparatus as claimed in claim 7 , further comprising an air discharge pipe penetrating through said bottom wall and extending upwards from said bottom wall a fifth height.

Claim 14

The cyclone dust-separating apparatus as claimed in claim 10 , wherein said fifth height is smaller than said second height.

Claim 15

The cyclone dust-separating apparatus as claimed in claim 11 , further comprising a spiral guide disposed on said bottom wall between said inner wall and said air discharge pipe.

Claim 16

The cyclone dust-separating apparatus as claimed in claim 12 , wherein said spiral guide increases in height from said bottom wall to a sixth height.

Claim 17

The cyclone dust-separating apparatus as claimed in claim 13 , wherein said fifth height is equal to the result of multiplying a coefficient by a value obtained by subtracting said sixth height from said second height and then adding said sixth height to said result.

Claim 18

The cyclone dust-separating apparatus as claimed in claim 14 , wherein said coefficient is approximately ⅓ to ½.

Claim 19

A cyclone dust-separating apparatus comprising: a cyclone body having an air inflow pipe, an air discharge pipe, a cyclone chamber, and a dirt-collecting chamber enclosing an outer circumference of the cyclone chamber; and an upper cover disposed on an upper end of the cyclone body to form a connection passage between the cyclone chamber and the dirt-collecting chamber, wherein the air inflow pipe and the air discharge pipe are formed on a lower part of the cyclone body such that dirt is prevented from flowing back through the air discharge pipe when the cyclone body is tilted over.

Claim 20

A cyclone dust-separating apparatus comprising: a cyclone body having an air inflow pipe, an air discharge pipe, a cyclone chamber, and a dirt-collecting chamber enclosing an outer circumference of the cyclone chamber; and an upper cover disposed on an upper end of the cyclone body to form a connection passage between the cyclone chamber and the dirt-collecting chamber, wherein the air inflow pipe and the air discharge pipe are formed on a lower part of the cyclone body such that dirt is prevented from flowing back through the air discharge pipe when the cyclone body is tilted over.

Claim 21

The cyclone dust-separating apparatus as claimed in claim 16 , wherein the air inflow pipe is formed on a lower side of the cyclone body, and penetrating through the dirt-collecting chamber to connect to the cyclone chamber; and, the air discharge pipe is formed on a lower side of the cyclone body, and protruding into the cyclone chamber.

Claim 22

The cyclone dust-separating apparatus as claimed in claim 17 , further comprising a guide disposed in the cyclone chamber to upwardly guide air drawn in through the air inflow pipe.

Claim 23

A cyclone dust-separating apparatus, comprising: a cyclone chamber in which air is drawn and dirt is separated from the drawn air by centrifugal force; a dirt-collecting chamber enclosing an outer circumference of the cyclone chamber; a connection passage formed on an upper end of the cyclone chamber, and connecting between the cyclone chamber and the dirt-collecting chamber, wherein external air is drawn through a lower side of the cyclone body and ascended inside the cyclone chamber in a whirling current, shedding out dirt, the dirt separated from the air is discharged through the connection passage and stored in the dirt-collecting chamber, and clean air is discharged through a center of a bottom of the cyclone chamber such that dirt of the dirt-collecting chamber is prevented from discharging out when the cyclone body is tilted over; and a backflow prevention member provided to an upper end of the dirt-collecting chamber.

Claim 24

A cyclone dust-separating apparatus, comprising: a cyclone chamber in which air is drawn and dirt is separated from the drawn air by centrifugal force; a dirt-collecting chamber enclosing an outer circumference of the cyclone chamber; a connection passage formed on an upper end of the cyclone chamber, and connecting between the cyclone chamber and the dirt-collecting chamber, wherein external air is drawn through a lower side of the cyclone body and ascended inside the cyclone chamber in a whirling current, shedding out dirt, the dirt separated from the air is discharged through the connection passage and stored in the dirt-collecting chamber, and clean air is discharged through a center of a bottom of the cyclone chamber such that dirt of the dirt-collecting chamber is prevented from discharging out when the cyclone body is tilted over; and a backflow prevention member provided to an upper end of the dirt-collecting chamber.