The present disclosure provides a vehicle air-conditioning device in which cooperative work with a power source is appropriate, which is easy to follow when the power source is restarted, and which reduces a driving force of a compressor at the time of restarting the power source. The vehicle air-conditioning device is provided with a refrigeration cycle. The refrigeration cycle has a compressor that is driven by a power source which may stop temporarily. The refrigeration cycle provides a low temperature and/or a high temperature. A high-temperature system and/or a low-temperature system is provided as a thermal buffer. The refrigeration cycle is provided with electric expansion valves which can be fully closed. The vehicle air-conditioning device is also provided with a control device, which fully closes the electric expansion valves when the compressor is temporarily stopped and which controls the electric expansion valves to the previous opening position when the compressor is restarted.

A transportation refrigeration system is provided including a tractor cabin having an engine and an engine cooling system. A trailer is operably coupled to the tractor cabin. A transport refrigeration unit is configured to maintain a controller temperature environment of a portion of the trailer. The transport refrigeration unit is mounted to a front surface of the trailer adjacent the truck. A shield (50) is mounted to at least one of the tractor cabin, trailer, and transport refrigeration unit. The shield is configured to block an air flow path between an area (42) of discharge air from the engine cooling system and a condenser air inlet (32) of the transport refrigeration unit.

A refrigerated cargo vehicle has a refrigerated enclosure and a refrigeration system that delivers a refrigerated air flow to the enclosure. The refrigeration system includes a compressor that has a voltage rating higher than the electric potential output of an alternator driven by an engine of the refrigerated cargo vehicle. A DC-to-DC power converter is disposed electrically between the alternator and the compressor so that the power converter receives electric current from the alternator at a first electric potential and outputs a second electric current to the compressor at a second electric potential higher than the first electric potential.

Battery energy systems having a housing and a battery management system for supplying power to a refrigerated container are disclosed. A battery management system includes a battery set, a battery management controller, an insulation monitoring device, a plurality of DC contactors, a DC/DC converter, a DC/DC controller, an inverter, an IoT gateway, a control panel, and a cooling system all interconnected. A battery energy system includes mounting brackets to mount the battery energy system to the nose or underside of a refrigerated container.

A vehicle air conditioning system connector is provided. The connector includes: a first supply port, a second supply port, a first return port, a second return port, a first branch port and a second branch port.

Problem to be Solved

To provide a heat exchanger that can increase the performance by setting an optimal number of tube groups in a configuration where each of the tube groups is provided with headers.

Solution

The number of arrays of tube groups of a core section 2 is set to three rows. The number N of heating medium flow holes 21 per tube is set for each width dimension Tw of tubes 20, and the tubes 20 are formed such that the width dimension Tw of the tubes and a flow channel cross-sectional area S satisfy a relationship of S1SS2. Therefore, the number of arrays of the tube groups in the core section 2 can be set to an optimal number of arrays for improving the endothermic capacity and reducing the weight, and sufficient refrigerant flow rate and pressure resistance can be secured. As a result, even when there is a restriction on the size of the entire heat exchanger, a light high-performance heat exchanger can be configured. This is significantly advantageous when the heat exchanger is used as an evaporator of a vehicle air conditioning apparatus for which a reduction in the weight of the components and an increase in the performance are demanded.

An expansion and isolation valve, specifically an electric expansion and isolation valve for operation with the coolant R744, featuring a valve body arranged in a valve body chamber, a seal seat, and a seal, which are arranged along an axial movement direction of the valve body in the expansion valve. The expansion valve is further designed such that in a closed state of the expansion valves, there is a pressure bypass to the valve body chamber, and preferentially, that a valve body diameter at the positions of the seal seat and the seal corresponds with the respective seal diameters.

A transportation refrigeration system is provided including a tractor cabin having an engine and an engine cooling system. A trailer is operably coupled to the tractor cabin. A transport refrigeration unit is configured to maintain a controller temperature environment of a portion of the trailer. The transport refrigeration unit is mounted to a front surface of the trailer adjacent the truck. A shield (50) is mounted to at least one of the tractor cabin, trailer, and transport refrigeration unit. The shield is configured to block an air flow path between an area (42) of discharge air from the engine cooling system and a condenser air inlet (32) of the transport refrigeration unit.

A permanent-magnet-embedded electric motor includes a stator core including a yoke and a plurality of teeth, a rotor core including a plurality of magnet insertion holes, and a plurality of permanent magnets respectively inserted into the magnet insertion holes, each being arranged with a lateral direction set in a radial direction of the rotor core and with a longitudinal direction set in a direction orthogonal to the radial direction. When a width of base sections of the teeth is represented as S1, a width of a distal end sections of the teeth is represented as S2, a width of the permanent magnets in the longitudinal direction is represented as R1, and a width of the magnet insertion holes in an extension direction thereof is represented as R2, relations of S1R1<S2 and S1R2R1 are satisfied.

A refrigeration cycle includes a compressor, a refrigerant radiator, first and second expansion valves configured to decompress refrigerant flowing out of the refrigerant radiator, a first evaporator configured to evaporate the refrigerant flowing out of the first expansion valve, and a second evaporator configured to evaporate the refrigerant flowing out of the second expansion valve. A heat medium circuit includes a heat exchange portion and circulates a heat medium while flowing through the heat exchange portion and the second evaporator. The first evaporator exchanges heat between the refrigerant and ventilation air blown to a space to be air conditioned, and the second evaporator exchanges heat between the heat medium and the refrigerant to evaporate the refrigerant and cool the heat medium. The heat exchange portion is made to cool the temperature regulation target.