A controller for a heat, ventilation, and air conditioning (HVAC) unit may comprise a compressor control signal output; a condenser fan control signal output; a pressure sensor input that receives information regarding an output pressure of the compressor; a temperature input that receives information regarding ambient temperature; a processor coupled to the compressor control signal output, the condenser fan control signal output, the first pressure sensor input, and the temperature input; and a computer-readable memory that stores instructions. The processor may cause the controller to: turn on the compressor via the compressor control signal output based on a request for air conditioning, select a condenser fan speed, from condenser fan control data stored in the computer readable memory, based on the ambient temperature and an output pressure of the compressor, and set a speed of the condenser fan to the selected condenser fan speed via the condenser fan control signal.

The invention concerns a method for managing a thermal management device (1) for a motor vehicle, comprising the following steps: —increasing the speed of rotation of the compressor (3) to its maximum speed, —determining a modified setpoint temperature (T15-sp3) of the third element (300) greater than the first setpoint temperature (T15-sp1), so that the temperature of the second element (200) at the outlet of the first evaporator (11) tends towards its setpoint temperature (T11-sp), —adjusting the opening diameter of the second expansion device (13) so that the temperature of the third element (300) at the outlet of the second evaporator (15) reaches a modified setpoint temperature (T15-sp3), until the temperature of the second element (200) at the outlet of the first evaporator (11) reaches the setpoint temperature (T11-sp). The invention further relates to the thermal management device (1) for implementing said management method.

In the case where the temperature of a battery is equal to or higher than a predetermined temperature, the battery is cooled with priority. In the case where the temperature of coolant to cool a PCU is equal to or higher than another predetermined temperature, the PCU is cooled with priority. In the case where the temperature of the battery is less than the predetermined temperature and the temperature of the coolant to cool the PCU is less than the other predetermined temperature, the air inside the vehicle cabin is cooled with priority.

The delivery system includes a vehicle and a server. The vehicle includes a power storage device and a refrigerator. The server performs a delivery planning process for determining an expected delivery time. In the delivery planning process, the server is configured to transmit, to the vehicle, an inquiry as to reception of the delivery matter. When the vehicle receives the inquiry from the server, the vehicle is configured to set a receivable time period and transmit it to the server. When the vehicle sets the receivable time period, if the vehicle is in a state that the vehicle is able to receive power from the power supply facility, the vehicle is configured to set the receivable time period to be longer than the receivable time period set if the vehicle is not in the state that the vehicle is able to receive power from the power supply facility.

To provide a construction machine capable of reducing the time and labor of an operator and reliably preventing deterioration of cooling efficiency of a heat exchanger unit. A construction machine includes a heat exchanger unit having a plurality of heat exchangers, a cooling fan configured to supply cooling air to the heat exchanger unit during a forward rotation thereof, a controller configured to control an operation of the cooling fan, a timer configured to count an operation time period of forward rotation of the cooling fan, and a reverse rotation signal output switch configured to output to the controller a reverse rotation signal for causing the cooling fan to rotate in the reverse direction in response to an applied manual operation. The controller causes the cooling fan to rotate in the reverse direction for a second predetermined time period and resets the timer at the time of finishing the reverse rotation of the cooling fan, if the operation time period of forward rotation counted by the timer reaches a first predetermined time period, and controller causes the cooling fan to rotate in the reverse direction for the second predetermined time period when the reverse rotation signal is output from the reverse rotation signal output switch, and resets the timer at the time of finishing the reverse rotation of the cooling fan, even if the operation time period of forward rotation counted by the timer has not reached the first predetermined time period.

Thermal management in a vehicle involves a compressor to output a refrigerant in vapor form for circulation in a refrigerant loop. A thermal management system includes a heating, ventilation, and air conditioning (HVAC) system in the refrigerant loop including an evaporator and an HVAC condenser, and an exterior condenser in the refrigerant loop configured to vent heat to an exterior of the vehicle. A first variable refrigerant flow valve (RFV) controls a flow rate of the refrigerant output by the compressor into the HVAC condenser, and a second RFV controls a flow rate of the refrigerant output by the compressor into the exterior condenser. A controller controls the first RFV and the second RFV based on a target output temperature for the HVAC condenser.

A vehicle air-conditioning device is provided which is capable of eliminating or suppressing vibration and noise generated due to the application of a counterpressure to an opening/closing valve. The vehicle air-conditioning device includes a refrigerant circuit R having a compressor 2, a radiator 4 to perform heat exchange between a refrigerant and air, an outdoor heat exchanger 7, a heat absorber 9, and a solenoid valve 40. The compressor 2 and the solenoid valve 40 are controlled to air-condition a vehicle interior. A decompression speed at a refrigerant inflow side of the solenoid valve when the compressor 2 is stopped and the solenoid valve 40 is closed is faster than that at a refrigerant outflow side thereof. When operation is stopped from a state in which the compressor 2 is operating with the solenoid valve 40 being in an opened state, the opened state of the solenoid valve 40 is maintained even after the compressor 2 is stopped.

A method of controlling a transport refrigeration system including a refrigeration unit including a compressor, and a refrigerated compartment operably coupled to the refrigeration unit, and the transport refrigeration system is operable in a standby mode in which the transport refrigeration system is connected to and powered by a mains power source, the method including providing a first compressor speed, wherein the first compressor speed is less than a maximum speed of the compressor of the refrigeration unit; determining when the transport refrigeration system is being operated in the standby mode; determining whether a current time is within a first time period; and when it is determined that the transport refrigeration system is being operated in the standby mode, and when it is determined that the current time is within the first time period: operating the compressor of the refrigeration unit in accordance with the first compressor speed.

The present invention quickly stops rotation of an electric compressor while preventing damage to switching elements. An electric compressor 1 comprises a motor drive circuit 52 having multiple switching elements IGBT Q1 to Q6, a control unit 53 that controls driving of the multiple switching elements IGBT Q1 to Q6 and drives a motor 4, and a current detection unit 54 that detects a current flowing through the motor drive circuit 52. The control unit 53 performs stop control that stops rotation of the compression mechanism 3 by performing braking control that controls drive of predetermined switching elements IGBT (Q2, Q4, Q6 and the like) among the multiple switching elements IGBT Q1 to Q6. In the brake control, when the detected current value I is lower than the first threshold I.sub.1, the control unit 53 adjusts the drive pattern of the predetermined switching elements IGBT (Q2, Q4, Q6 and the like) in order to prevent the detected current value I from exceeding the second threshold I.sub.2 that is lower than the first threshold I.sub.1.

A transport refrigeration system including: a transport refrigeration unit configured to provide conditioned air to a refrigerated cargo space of a transport container; a fuel cell configured to provide electricity to the transport refrigeration unit; one or more supplemental power sources configured to provide supplemental electricity to the transport refrigeration unit; and a power management module configured to manage the electricity and the supplemental electricity provided to the transport refrigeration unit, wherein the power management module is configured to detect a condition of the transport refrigeration unit that requires supplemental electricity and provide the supplemental electricity to the transport refrigeration unit from the one or more supplemental power sources.