Provided is an air conditioner including at least one indoor unit; an EHP outdoor unit connected with the at least one indoor unit, and configured to control an applied current and drive an EHP compressor; a GHP outdoor unit connected with the at least one indoor unit and including a GHP compressor configured to operate using power from an engine driven through a combustion gas and an oil separator provided at an outlet side of the GHP compressor; an oil level sensor provided at the EHP outdoor unit or the GHP outdoor unit and configured to detect an amount of oil; and a control part configured to control an RPM of the EHP compressor or the GHP compressor based on information detected by the oil level sensor.

An air conditioning refrigerant circuit (6) includes an engine-driven compressor (7) and an electric compressor (11), which are arranged in parallel. When the engine is running, the engine-driven compressor (7) is used. When the engine stops, e.g., when idling stops, the electric compressor (11) is used. At the startup of the engine by a manual operation such as ignition by a key, the engine-driven compressor (7) is kept at rest and instead, the electric compressor (11) is operated for a predetermined time. After the predetermined time, the engine-driven compressor (7) is operated. In this way, the oil recovery to the electric compressor is promoted.

Facility having a storage unit comprising a housing enclosing a storage volume for receiving goods and/or equipment further comprising an operating system provided with a tempering unit associated with said storage volume for maintaining a defined or set temperature in said storage volume, said operating system being provided with a refrigerant circuit comprising an internal heat exchanger, arranged in said tempering unit, an external heat exchanger as well as a compressor unit for compressing refrigerant, characterized in that said operating system is provided with an engine for driving said compressor unit as an independent power source and said operating system is provided with an electric generator unit mechanically coupled to said engine, said compressor unit and/or said generator unit are driven by said engine independent power source, and said operating system is connected to a local energy supply system of said facility.

Methods and systems for power management using a power converter in transport are provided. In one embodiment, the method includes monitoring a varying AC input to the power converter. The method also includes calculating a power factor adjustment based on the monitored varying AC input. Also, the method includes a power converter controller adjusting the power converter based on the calculated power factor adjustment to cause the power converter to supply a reactive current to a varying AC load.

An internal temperature adjusting device includes a heat pump, an internal heat exchanger, and an external heat exchanger. The internal heat exchanger is configured to function as one of an evaporator or a condenser of the heat pump, and exchange heat between a heat medium and air inside the container. The external heat exchanger is configured to function as the other one of the evaporator or the condenser, and exchange heat between the heat medium and air outside the container. The external heat exchanger includes a plurality of heat exchanging members separated from each other. According to the internal temperature adjusting device, drainage of the external heat exchanger as a whole can be secured.

A method of operating a transport refrigeration system is provided. The method includes electrically powering a first plurality of components of a first refrigeration unit and a second plurality of components of a second refrigeration unit, wherein electrically powering comprises operating a prime mover and an electric generation device. The method also includes monitoring a plurality of operating parameters of the first refrigeration unit. The method further includes monitoring a plurality of operating parameters of the second refrigeration unit. The method yet further includes calculating a combined power load of the first refrigeration unit and the second refrigeration unit. The method also includes comparing the combined power load to a maximum available power of the prime mover.

A refrigeration system includes a compressor configured to compress a refrigerant, a condenser, and an evaporator. A heat exchanger is disposed downstream of the condenser and upstream of the evaporator, and disposed downstream of the evaporator and upstream of the compressor, the heat exchanger configured to facilitate heat exchange between the refrigerant supplied from the condenser and the refrigerant supplied from the evaporator. A first expansion device is disposed downstream of the heat exchanger and upstream of the evaporator, and a second expansion device is disposed downstream of the condenser and upstream of the heat exchanger. The second expansion device is configured to cool the refrigerant passing therethrough to cool the refrigerant in the heat exchanger supplied from the evaporator to the compressor.

An apparatus includes a chamber, a first heat exchanger, an adapter, and a second heat exchanger. The first heat exchanger includes a cold finger positioned within the chamber. The second heat exchanger is positioned around an adapter and within the chamber. The second heat exchanger is a counter flow heat exchanger to precool refrigerant entering a Joule-Thomson valve. The adapter is positioned between the cold finger and the second heat exchanger. The adapter transfers heat from a thermal load to both the cold finger and the refrigerant emitted from the Joule-Thomson valve.

A transport refrigeration system is provided including a refrigeration unit and a diesel engine powering the refrigeration unit. The diesel engine has an exhaust system for discharging engine exhaust from the diesel engine. An exhaust treatment unit is disposed in the diesel engine exhaust system and includes a diesel oxidation catalyst and a diesel particulate filter. An air control valve is configured to control a quantity of air provided to the diesel engine from an air supply fluidly coupled to the diesel engine. A controller is operably coupled to the air control valve. After initiating regeneration of the diesel particulate filter, the controller is configured to operate the system in either a primary regeneration mode or a secondary regeneration in response to a condition monitored within the exhaust treatment unit.

In a case where a control device receives a stop signal instructing stopping of an engine and the control device determines that the engine temperature is lower than a predetermined temperature based on a signal from a timer or based on a signal from a cooling water temperature sensor, an operation control is maintained until the control device determines that the engine temperature is the predetermined temperature or higher. This way, an engine is provided which is capable of restraining generation of blowby condensate water without stopping a cooling water pump during the operation of the engine.