Control scheme for beverage coolers optimized for beverage quality and fast pulldown time
Systems and methods for an actively cooled container comprising: a power subsystem; an active cooling subsystem; and a control subsystem are provided. In some embodiments, the control subsystem is configured to: determine that additional cooling is needed; cause the active cooling subsystem to cool the actively cooled container below a lower limit; determine to end the additional cooling; and cause the active cooling subsystem to cool the actively cooled container at or above the lower limit. In this way, the best balance between a fast cooldown time and not damaging (e.g., through freezing) the product load (e.g., beverages), is achieved.
1 . An actively cooled container comprising:
a power subsystem;
an active cooling subsystem; and
a control subsystem;
wherein the control subsystem is configured to:
operate the active cooling subsystem in a standard cooling mode to maintain the actively cooled container at a target setpoint;
determine that additional cooling is needed;
in response, cause the active cooling subsystem to cool the actively cooled container below a lower limit, wherein the lower limit is below the target setpoint;
determine to end the additional cooling;
in response, cause the active cooling subsystem to return to the standard cooling mode and cool the actively cooled container at or above the target setpoint.
2 . The actively cooled container of claim 1 wherein being configured to determine that the additional cooling is needed comprises being configured to determine that additional products have been added to the actively cooled container.
3 . The actively cooled container of claim 2 wherein being configured to cause the active cooling subsystem to cool the actively cooled container below the lower limit comprises being configured to cause the active cooling subsystem to cool the actively cooled container below zero Celsius.
4 . The actively cooled container of claim 3 wherein being configured to determine to end the additional cooling comprises being configured to determine that a door open event has occurred.
5 . The actively cooled container of claim 4 wherein being configured to determine to end the additional cooling comprises being configured to determine that a time out event has occurred.
6 . The actively cooled container of claim 5 wherein the length of the time out event is such that products in the actively cooled container are not spoiled.
7 . The actively cooled container of claim 6 wherein the length of the time out event is such that products in the actively cooled container are not frozen.
8 . The actively cooled container of claim 7 wherein the length of the time out event is based on an ambient temperature of the actively cooled container.
9 . The actively cooled container of claim 8 wherein the length of the time out event is longer if the ambient temperature of the actively cooled container is lower.
10 . The actively cooled container of claim 9 wherein the active cooling subsystem comprises one or more Thermoelectric Coolers.
11 . A method of controlling an actively cooled container comprising:
operating the active cooling subsystem in a standard cooling mode to maintain the actively cooled container at a target setpoint;
determining that additional cooling is needed;
in response, causing an active cooling subsystem to cool the actively cooled container below a lower limit, wherein the lower limit is below the target setpoint;
determining to end the additional cooling;
in response, causing the active cooling subsystem to return to the standard cooling mode and cool the actively cooled container at or above the target setpoint.
12 . The method of claim 11 wherein determining that the additional cooling is needed comprises determining that additional products have been added to the actively cooled container.
13 . The method of claim 12 wherein causing the active cooling subsystem to cool the actively cooled container below the lower limit comprises causing the active cooling subsystem to cool the actively cooled container below zero Celsius.
14 . The method of claim 13 wherein determining to end the additional cooling comprises determining that a door open event has occurred.
15 . The method of claim 14 wherein determining to end the additional cooling comprises determining that a time out event has occurred.
16 . The method of claim 15 wherein the length of the time out event is such that products in the actively cooled container are not spoiled.
17 . The method of claim 16 wherein the length of the time out event is such that products in the actively cooled container are not frozen.
18 . The method of claim 17 wherein the length of the time out event is based on an ambient temperature of the actively cooled container.
19 . The method of claim 18 wherein the length of the time out event is longer if the ambient temperature of the actively cooled container is lower.
20 . The method of claim 19 wherein the active cooling subsystem comprises one or more Thermoelectric Coolers.