Abstract: A transport refrigeration unit (TRU) direct current (DC) architecture includes a communications bus (41), a DC power bus (42), first and second voltage control units (VCUs 43,44) respectively comprising a DC/DC converter (430) coupled to the DC power bus and a local controller (431,441) coupled to the communications bus and to the DC/DC converter, an energy storage unit (45) and a DC powered load. The energy storage unit is configured to provide to the DC power bus (42) a quantity of DC power via the DC/DC converter (430) of the first VCU in accordance with control exerted thereon by the local controller (431) of the first VCU and a DC powered load. The DC powered load is configured to receive from the DC power bus a quantity of DC power via the DC/DC converter of the second VCU in accordance with control exerted thereon by the local controller of the second VCU.

Abstract: A refrigerated container (10) that includes a container (10), an auxiliary lock (42), and a ventilation system. The container (10) defines an interior space (14) and has a door (30) to selectively permit access to the interior space (14). The auxiliary lock (42) is arranged to selectively inhibit the door (30) from moving from the closed position towards the open position. The ventilation system includes a leak sensor (44) and a controller (48). The leak sensor (44) is arranged to provide a signal indicative of a concentration of a refrigerant within the interior space (14) of the container (10). The controller (48) is arranged to receive the signal and is programmed to command the auxiliary lock (42) to move towards the lock position, responsive to the signal being indicative of the concentration of the refrigerant within the interior space (14) being greater than a threshold.

Abstract: A transport refrigeration unit (TRU) direct current (DC) architecture includes a communications bus (41), a DC power bus (42), first and second voltage control units (VCUs 43,44) respectively comprising a DC/DC converter (430) coupled to the DC power bus and a local controller (431,441) coupled to the communications bus and to the DC/DC converter, an energy storage unit (45) and a DC powered load. The energy storage unit is configured to provide to the DC power bus (42) a quantity of DC power via the DC/DC converter (430) of the first VCU in accordance with control exerted thereon by the local controller (431) of the first VCU and a DC powered load. The DC powered load is configured to receive from the DC power bus a quantity of DC power via the DC/DC converter of the second VCU in accordance with control exerted thereon by the local controller of the second VCU.