Multistage cyclone and surface cleaning apparatus having same
First Claim
1. A hand vacuum cleaner having a front end and a rear end, the hand vacuum cleaner comprising:
- (a) a first stage cyclone having a first stage cyclone chamber, a first stage dirt collection chamber which is external to the first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber, the first stage cyclone chamber having a length in a direction of the first stage longitudinal cyclone axis, the first stage dirt collection chamber receives dirt from the first stage cyclone chamber via a first stage dirt outlet; and
,(b) a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a second stage cyclone chamber, a plurality of second stage tangential cyclone air inlets provided in a sidewall of the second stage cyclone chamber, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber, the second stage cyclone chamber having a length in a direction of the second stage longitudinal cyclone axis,wherein the length of the second stage cyclone chamber is shorter than the length of the first stage cyclone chamber.
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Accused Products
Abstract
A hand vacuum cleaner may have a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber. A second stage cyclone may be downstream from the first stage cyclone and may be at least substantially nested in the first stage cyclone. The second stage cyclone may have a second stage cyclone chamber, a plurality of second stage cyclone air inlets, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber. A length of the second stage cyclone chamber may be shorter than a length of the first stage cyclone chamber.
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Citations
20 Claims
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1. A hand vacuum cleaner having a front end and a rear end, the hand vacuum cleaner comprising:
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(a) a first stage cyclone having a first stage cyclone chamber, a first stage dirt collection chamber which is external to the first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber, the first stage cyclone chamber having a length in a direction of the first stage longitudinal cyclone axis, the first stage dirt collection chamber receives dirt from the first stage cyclone chamber via a first stage dirt outlet; and
,(b) a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a second stage cyclone chamber, a plurality of second stage tangential cyclone air inlets provided in a sidewall of the second stage cyclone chamber, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber, the second stage cyclone chamber having a length in a direction of the second stage longitudinal cyclone axis, wherein the length of the second stage cyclone chamber is shorter than the length of the first stage cyclone chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A hand vacuum cleaner having a front end and a rear end, the hand vacuum cleaner comprising:
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(a) a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber, the first stage cyclone chamber having a length in a direction of the first stage longitudinal cyclone axis; (b) a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a second stage cyclone chamber, a plurality of second stage tangential cyclone air inlets provided in a sidewall of the second stage cyclone chamber, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber, the second stage cyclone chamber having a length in a direction of the second stage longitudinal cyclone axis; and
,(c) a hand vacuum cleaner air inlet conduit having a direction of flow, wherein the length of the second stage cyclone chamber is shorter than the length of the first stage cyclone chamber, and wherein the first and second stage longitudinal cyclone axis are generally parallel to the direction of flow. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A hand vacuum cleaner having a front end and a rear end, the hand vacuum cleaner comprising:
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(a) a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber, the first stage cyclone chamber having a length in a direction of the first stage longitudinal cyclone axis; (b) a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a second stage cyclone chamber, a plurality of second stage tangential cyclone air inlets provided in a sidewall of the second stage cyclone chamber, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber, the second stage cyclone chamber having a length in a direction of the second stage longitudinal cyclone axis; and
,wherein the length of the second stage cyclone chamber is shorter than the length of the first stage cyclone chamber, and wherein the second stage cyclone comprises 4 to 8 second stage tangential cyclone air inlets which are each individually in communication with an air flow path from the first stage cyclone air outlet to the second stage cyclone.
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Specification