A refrigeration efficiency monitoring system detects degradation of a refrigeration system by monitoring a deviation from a normal operating status of the refrigeration system at an early stage of such degradation. The monitoring system detects and calculates a plurality of system parameters associated with the refrigeration system. The monitoring system then determines a decrease in efficiency of the refrigeration system based on comparison between the system parameters and reference values representative of the normal operating status, and generate a service recommendation based on the determination.

The present invention discloses a vehicle refrigeration system, which includes: a refrigeration module which has a compressor 20, a condenser 31, a throttling element 40 and an evaporator 50 that are connected in sequence through a pipeline; and a power module which has an engine 10 linked to the compressor 20; where the engine has a variable speed component which is capable of causing the engine to run at different multistep or stepless rotating speeds. Through the vehicle refrigeration system, the present invention solves technical problems that exist in the existing vehicle refrigeration system, for example, the vehicle refrigeration system has poor regulation capability, is not applicable to extreme working conditions and the like.

Disclosed are climate systems for vehicles and methods for controlling the climate systems. In some implementations, a climate system includes: (1) a temperature sensor configured to measure a temperature within the compartment of the vehicle; (2) a first compressor powered by an engine of the vehicle to compress a refrigerant; (3) a second compressor driven by an electric motor to compress the refrigerant; and (4) a controller electrically coupled to the first compressor and the second compressor. The controller configured to: (1) calculate a thermal load of the compartment based on a difference between a desired temperature and a measured temperature; and, (2) based on the calculated load, selectively activate: (i) the engine, (ii) the first compressor, and/or (iii) the second compressor.

A power system architecture configured to power a transport refrigeration system (20) based on a determined an AC power requirement. The system (20) includes a generator power converter (164) configured to receive the generator three phase AC power (163) from an AC generator (162), and provide a generator DC power (165). The system (20) also includes a grid power converter (184) configured to receive the grid three phase AC power from a grid power source (182), and provide a grid DC power (185), an energy storage device (152), the energy storage device (152) operable to provide a DC power (157) and connected to a variable DC bus, and a power management system (190) operably connected to direct power (195) the TRU (26) based on at least the AC power requirement.

Methods and systems for controlling a transport refrigeration system are provided. In one instance, the method includes identifying an operational mode change request for a heat exchanger unit of the transport refrigeration system. The method also includes preparing the transport refrigeration system for the operational mode change of the heat exchanger unit, wherein preparing the transport refrigeration system for the operational mode change of the heat exchanger unit includes performing a load control action, the load control action preventing a power source of the transport refrigeration system from at least one of operating outside of a predefined revolutions per minute (RPM) bandwidth and exceeding a predefined power limit of the power source. Also, the method includes changing the operational mode of the heat exchanger unit; and removing the load control action.

A method for controlling a system for air conditioning and/or heating, the system including a loop for the circulation of a refrigerant, with a first heat exchanger between the refrigerant and the inside air stream, a second heat exchanger between the refrigerant and the inside air stream or a heat transfer fluid, the method including selecting a mode for dehumidifying the inside air stream from a plurality of dehumidification modes, the selecting being implemented on the basis of maps, produced in advance, of at least humidity control parameters, selected from an actual temperature of the inside air stream upstream of the first heat exchanger, a temperature setpoint downstream of the second heat exchanger, a temperature setpoint downstream of the first exchanger, a flow rate of the inside air stream through the first exchanger, an ambient temperature of the air and/or a humidity of the air.

Methods and systems are provided for controlling an air conditioning compressor clutch. In one example, a method includes monitoring a clutch of an air conditioning system in a vehicle when the air conditioning system is activated, and responsive to determining that the clutch is not engaged, increasing a current flow to the clutch. In this way, engagement of the compressor clutch may be dynamically maintained with a reduced usage of electrical power.

A hybrid vehicle, an air conditioning system and a method for controlling the air conditioning system are provided. The air conditioning system includes: an electric compressor; a mechanical compressor, connected with the electric compressor in parallel; a power battery, connected with the electric compressor and configured to supply power to the electric compressor; an engine, connected with the mechanical compressor and configured to supply a power source to the mechanical compressor; an engine controller, connected with the engine and configured to start the engine when the mechanical compressor is to be started; a battery manager, connected with the power battery and configured to detect a state of charge of the power battery; and a controller, connected with the engine controller and the battery manager and configured to start the electric compressor and the mechanical compressor at different time according to the state of charge of the power battery.

A vehicle heating, ventilation, and air conditioning (HVAC) system includes: a compressor; an interior condenser located on the downstream side of the compressor and disposed in an HVAC case; a heating-side expansion valve located on the downstream side of the interior condenser; a water-cooled heat exchanger located on the downstream side of the heating-side expansion valve; and a controller. The controller is configured to adjust an opening degree of the heating-side expansion valve based on a temperature difference between air flowing from the interior condenser to front seats of a vehicle cabin and air flowing from the interior condenser to rear seats of the cabin. The controller is also configured to adjust the opening degree based on an amount of heat (heat release amount) transferred from the interior condenser to the air.

The disclosure relates to the field of electric vehicles, and in particular provides a vehicle refrigerator control method, a storage medium, and a vehicle, aiming to solve the problems of how to implement the intelligent identification of items stored in a vehicle refrigerator, and of controlling the vehicle refrigerator based on information of the stored item and vehicle state information. To this end, the method of the disclosure includes: obtaining item information of a vehicle refrigerator; obtaining a real-time temperature and a target temperature of the vehicle refrigerator; obtaining vehicle state information; and controlling the vehicle refrigerator based on the real-time temperature, the target temperature, and the vehicle state information. By applying the method of the disclosure, the user can quickly and accurately know the information of the item stored in the vehicle refrigerator, a suitable target temperature can be automatically set based on the item information, and the vehicle refrigerator can be controlled, based on the vehicle state information, to operate in different modes. The method of the disclosure not only optimizes the control over the vehicle refrigerator, satisfies the refrigeration requirement, but also solves the problems of NVH and vehicle energy consumption, etc, thereby providing users with a more comfortable experience.