Lint handling system
First Claim
1. A lint handling system for a laundry dryer, having a dryer drum with an air inlet and an exit grill for exhaust air, comprising:
- a blower for creating an airflow through the drum between the inlet and exit grill;
a blower speed increaser to increase airflow through the dryer drum;
a lint container;
a foreign objects trap connected to the exit grill;
a lint separator to separate lint from the exhaust air from the dryer, the lint separator having an input connected to the foreign objects trap and having an output connected to the lint container,a scroll-shaped centrifugal blower housing, the housing having a cylindrical base to accept airflow tangentially, a sloped cutoff and a throat region to produce high velocity airflow;
and wherein said scroll-shaped centrifugal blower housing contains a Helmholtz resonator located in the throat to reduce the acoustic emissions at a blade passage frequency.
1 Assignment
0 Petitions
Accused Products
Abstract
An improved lint handling system for a household laundry dryer is provided. The lint handling system for a laundry dryer has a dryer drum with an exit grill. The lint handling system provides a blower speed increaser to increase airflow in the dryer. The lint handling system also has a lint container and a foreign objects trap connected to the exit grill. Also a lint separator to separate lint from the airflow in the dryer is provided. The lint separator has an input connected to the foreign objects trap and an output connected to the lint container. A laundry dryer having a lint handling system as described is also provided. The lint handling system of the invention also provides a scroll-shaped centrifugal blower housing having a cylindrical base to accept airflow tangentially, a cutoff and a throat region to produce high velocity airflow. The blower housing further has a Helmholtz resonator located in the throat to reduce the acoustic emissions at a blade passage frequency. The lint handling system of the present invention also provides an eyebrow extension of the lint separator to produce a low pressure airflow region.
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Citations
26 Claims
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1. A lint handling system for a laundry dryer, having a dryer drum with an air inlet and an exit grill for exhaust air, comprising:
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a blower for creating an airflow through the drum between the inlet and exit grill; a blower speed increaser to increase airflow through the dryer drum; a lint container; a foreign objects trap connected to the exit grill; a lint separator to separate lint from the exhaust air from the dryer, the lint separator having an input connected to the foreign objects trap and having an output connected to the lint container, a scroll-shaped centrifugal blower housing, the housing having a cylindrical base to accept airflow tangentially, a sloped cutoff and a throat region to produce high velocity airflow; and wherein said scroll-shaped centrifugal blower housing contains a Helmholtz resonator located in the throat to reduce the acoustic emissions at a blade passage frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A laundry dryer comprising:
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a dryer drum having an air inlet and an exit grill for exhaust air; a blower having rotating blades for creating an airflow through the drum between the inlet and exit grill; a lint container comprising a lint containment box having a lid and a screened drawer to hold lint until disposal thereof; and a lint separator to separate lint from the airflow in the dryer, the lint separator having an input communicating with the exit grill, an output connected to the lint container and a scroll-shaped centrifugal blower housing, the housing having a cylindrical base to accept airflow tangentially, a cutoff and a throat region to produce high velocity airflow, and a Helmholtz resonator located in the throat to reduce the acoustic emissions at a blade passage frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A laundry dryer comprising:
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a dryer drum having an air inlet and an exit grill for exhaust air; a lint container; and a lint separator to separate lint from the airflow in the dryer, the lint separator having an input connected to the foreign objects trap, an output connected to the lint container, a scroll-shaped centrifugal blower housing, the housing having a cylindrical base to accept airflow tangentially, a cutoff and a throat region to produce high velocity airflow, a housing cover having an integral cap member connected to the cylindrical base of the blower housing to form a swirl chamber, the cap member having an annular wall and a tangential outlet through which the separated lint can pass, a stationary diffuser located within and the swirl chamber and an eyebrow extension of the cap member annular wall positioned at the swirl chamber entrance to produce a low pressure airflow region on the interior surface thereof.
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25. A lint handling system for a laundry dryer, having a dryer drum with an air inlet and an exit grill for exhaust air, comprising:
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a blower for creating an airflow through the drum between the inlet and exit grill; a blower speed increaser to increase airflow through the dryer drum; a foreign objects trap connected to the exit grill; a lint separator to separate lint from the exhaust air from the dryer, the lint separator having an input connected to the foreign objects trap and having a tangential output; and a lint container including; a lint tray having a first and a second fitting; a lint transport tube connecting the tangential outlet port of the lint separator to the lint tray using the first fitting; and an air recirculation tube connected to the second fitting on the downstream side of the lint tray to direct air that passes through the lint container back to a region of re-entrance into the dryer exhaust air.
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26. A lint handling system for a laundry dryer, having a dryer drum with an air inlet and an exit grill for exhaust air, comprising:
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a blower for creating an airflow through the drum between the inlet and exit grill; a blower speed increaser to increase airflow through the dryer drum; a lint container; a foreign objects trap connected to the exit grill; and a lint separator to separate lint from the exhaust air from the dryer, the lint separator having an input connected to the foreign objects trap and having an output connected to the lint container, the lint separator further including; a scroll-shaped centrifugal blower housing, the housing having a cylindrical base to accept airflow tangentially, a sloped cutoff and a throat region to produce high velocity airflow; a housing cover having an integral cap member connected to the cylindrical base of the blower housing to form a swirl chamber, the cap member having an annular wall and a tangential outlet through which the separated lint can pass; a stationary diffuser located within the swirl chamber; and an eyebrow extension of the cap member annular wall positioned at the swirl chamber entrance to produce a low pressure airflow region on the interior surface thereof.
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Specification