Cool down logic for condensing type dryers
A method of operating a laundry appliance includes rotating a laundry basket at a tumble speed during a drying cycle of a laundry appliance and energizing a conditioning system for process air. A fan is operated at a first speed to recirculate a flow of process air for a portion of a drying cycle. The conditioning system is deenergized and the fan is operated at a second speed during a second portion of the drying cycle where the second speed less than the first speed.
1 . A laundry appliance comprising:
a tub positioned within a cabinet;
a basket supported for rotation within the tub, the basket defining a chamber for receipt of laundry articles for drying;
a conditioning system comprising a dehumidification section and a heating section;
a recirculating air flow system for providing fluid communication between the chamber and the conditioning system, wherein the recirculating air flow system, the conditioning system, and the basket define a process air flow path, wherein the recirculating air flow system comprises one or more flow control devices operable to control the flow of process air through the process air flow path;
a fan operable to move a flow of process air through the process air flow path; and
a controller operably coupled to the conditioning system and the fan, the controller being configured to:
rotate the basket at a tumble speed during a drying cycle;
energize the conditioning system;
energize the fan to operate at a first speed to recirculate a first air flow through the recirculating air flow system during a first portion of the drying cycle;
deenergize the conditioning system; and
selectively energize the fan to operate at a second speed during a second portion of the drying cycle, the second speed less than the first speed.
2 . The laundry appliance of claim 1 , wherein the first portion of the drying cycle is a heating process for heating the laundry articles.
3 . The laundry appliance of claim 1 , wherein the second portion of the drying cycle is a cooling process for allowing the laundry articles to cool.
4 . The laundry appliance of claim 1 , wherein energizing the conditioning system comprises energizing at least one of the dehumidification section and the heating section during the drying cycle.
5 . The laundry appliance of claim 1 , wherein the dehumidification section comprises an evaporator.
6 . The laundry appliance of claim 1 , wherein the heating section comprises a condenser.
7 . The laundry appliance of claim 1 , wherein selectively energizing the fan during the second portion of the drying cycle includes deenergizing the fan for a time period.
8 . The laundry appliance of claim 7 , wherein the basket rotating at tumble speed induces an air flow through the recirculating air flow system.
9 . The laundry appliance of claim 1 , wherein the one or more flow control devices operate to block the flow of process air to the basket.
10 . A method of operating a laundry appliance, the laundry appliance comprising a basket supported for rotation within a tub, a conditioning system comprising a dehumidification section and a heating section, a recirculating air flow system in fluid communication with the basket and the conditioning system, wherein the recirculating air flow system, the conditioning system, and the basket define a process air flow path, and a fan operable to move a flow of process air through the process air flow path, the method comprising:
rotating the basket at a tumble speed during a drying cycle;
energizing the conditioning system;
energizing the fan to operate at a first speed to recirculate a first air flow through the recirculating air flow system during a first portion of the drying cycle;
deenergizing the conditioning system; and
selectively energizing the fan to operate at a second speed during a second portion of the drying cycle, the second speed less than the first speed,
wherein selectively energizing the fan during the second portion of the drying cycle includes deenergizing the fan for a time period.
11 . The method of claim 10 , wherein operating the fan at the first speed recirculates heated process air through the process air flow path.
12 . The method of claim 10 , wherein operating the fan at the second speed recirculates process air through the process air flow path.
13 . The method of claim 10 , wherein energizing the conditioning system comprises energizing at least one of the dehumidification section and the heating section during the drying cycle.
14 . The method of claim 13 , wherein energizing the dehumidification section comprises energizing an evaporator.
15 . The method of claim 13 , wherein energizing the heating section comprises energizing a condenser.
16 . The method of claim 10 , wherein rotating the basket at the tumble speed induces an air flow through the recirculating air flow system.
17 . The method of claim 10 , wherein the recirculating air flow system comprises one or more flow control devices; and wherein the method further comprises operating the one or more flow control devices to control the flow of process air through the process air flow path.
18 . The method of claim 17 , wherein the method further includes operating the one or more flow control devices to block the flow of process air to the basket.