Air circulation type vacuum cleaner
AssigneeLG Electronics Inc.
InventorSeong Bin Lee
Life of this patent
Estimating the term…
Abstract
An air circulation type vacuum cleaner having a casing with a suction port and an exhaust port, a suction blower placed to intake air with impurities through the suction port, a suction fan having a dust collecting filter placed on the outlet side of the suction blower to filter the impurities from the air. The vacuum cleaner also has at least one reflux pipe with an inlet portion placed on an outlet side of the suction fan in order to return the air discharged from the suction fan to an inlet side of the suction fan and at least one ejector installed on an outlet side of the reflux pipe. The suction force generated by the suction fan and the suction force generated by the vacuum pressure from the redirection of air in the reflux pipe are used together to improve the suction ability of the vacuum cleaner.
Claims25
An air circulation type vacuum cleaner, comprising:
- a casing having a suction port and an exhaust port;
- a suction blower having an inlet and an outlet, wherein the inlet is placed on the suction port of the casing to intake air with impurities through the suction port of the casing;
- a suction fan having an inlet and an outlet;
- a dust collecting filter, wherein the filter is placed after the outlet of the suction blower, and wherein the dust collecting filter removes a portion of the impurities from the air;
- at least one reflux pipe with an inlet and an outlet, wherein the inlet of the reflux pipe is placed on the outlet side of the suction fan and wherein the outlet of the reflux pipe is arranged to return air discharged from the outlet side of the suction fan to the inlet side of the suction fan;
- and
- at least one ejector installed on the outlet side of the at least one reflux pipe, wherein the at least one ejector is configured to discharge air towards the suction fan to thereby increase a suction of the vacuum cleaner.
An air circulation type vacuum cleaner, comprising:
- a casing having a suction port and an exhaust port;
- a suction blower having an inlet and an outlet, wherein the inlet is placed on the suction port of the casing to intake air with impurities through the suction port of the casing;
- a fan having an inlet and an outlet wherein the fan provides a suction force;
- a dust collecting filter positioned after the outlet of the suction blower;
- at least one reflux pipe with an inlet and outlet, wherein the inlet is located on the outlet side of the fan and is configured to return air discharged from the outlet side of the fan to the inlet side of the fan;
- and
- at least one ejector coupled to the outlet of the at least one reflux pipe, wherein the ejector is placed either between the dust collecting filter and the fan, or between the suction blower and the dust collecting filter.
An air circulation type vacuum cleaner, comprising:
- a casing having a suction port and an exhaust port;
- a suction blower having an inlet and an outlet, wherein the inlet is placed on the suction port of the casing to intake air with impurities through the suction port;
- a suction fan having an inlet and an outlet, and wherein the suction fan provides a suction force;
- a dust collecting filter, wherein the filter is located after the outlet of the suction blower, and wherein the dust collecting filter removes a portion of the impurities from the air;
- and
- at least one reflux pipe with an inlet and outlet, wherein the inlet is placed on the outlet side of the suction fan and is configured to return air discharged from the outlet side of the suction fan to the inlet side of the suction fan and wherein the reflux pipe comprises a flow channel groove having a spiral shape on an inner circumference of the reflux pipe.
A vacuum cleaner, comprising:
- a casing having a suction port and an exhaust port;
- a suction blower formed on an outlet portion of the suction port;
- a dust collecting filter located after an outlet portion of the suction blower;
- a fan configured to provide a suction force that draws air into the suction port;
- a reflux pipe with an inlet end of the reflux pipe near an outlet portion of the fan;
- and
- an ejector connected to an outlet end of the reflux pipe, wherein the ejector is placed either between the suction blower and the dust collecting filter, or between the dust collecting filter and the fan.
A vacuum cleaner, comprising:
- a casing having a suction port and an exhaust port;
- a dust collecting filter located after an outlet portion of the suction port;
- a fan configured to provide a suction force that draws air into the suction port;
- a reflux pipe having an inlet end near an outlet portion of the fan;
- and
- an ejector connected to an outlet end of the reflux pipe, wherein the ejector ejects air from the reflux pipe towards the fan to increase a suction force of the vacuum cleaner.
Dependencies are inferred from the claim text.