US 12,290,078 B2
Internal air adjustment device
Motomi Nishimoto, Osaka (JP); and Naohiro Tanaka, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Jan. 4, 2022, as Appl. No. 17/568,228.
Application 17/568,228 is a continuation of application No. PCT/JP2020/026842, filed on Jul. 9, 2020.
Claims priority of application No. 2019-128406 (JP), filed on Jul. 10, 2019.
Prior Publication US 2022/0125064 A1, Apr. 28, 2022
Int. Cl. A23B 7/148 (2006.01); A23B 7/152 (2006.01); B01D 53/30 (2006.01)
CPC A23B 7/148 (2013.01) [A23B 7/152 (2013.01); B01D 53/30 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An internal air adjustment device that supplies low-oxygen-concentration air having an oxygen concentration lower than an oxygen concentration of external air of a storage to the storage, and that maintains an oxygen concentration of internal air of the storage in a target oxygen concentration range lower than a reference concentration, and
that is constituted to perform an oxygen-concentration restoration operation of increasing the oxygen concentration of the internal air of the storage to the reference concentration from the target oxygen concentration range,
the internal air adjustment device comprising:
at least one pump connected to the storage;
a valve between an interior of the storage to an exterior of the storage; and
a controller that is configured to, in the oxygen-concentration restoration operation, regulate at least one of a flow rate and the oxygen concentration of the low-oxygen-concentration air that is supplied into the interior of the storage or a flow rate of the external air that is supplied into the interior of the storage by controlling the at least one pump and the valve,
the controller being configured to regulate the at least one of the flow rate and the oxygen concentration of the low-oxygen-concentration air that is supplied into the interior of the storage or the flow rate of the external air that is supplied into the interior of the storage to cause a speed of increase in the oxygen concentration of the internal air to be less than or equal to a predetermined maximum speed.