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The EXV is a control valve used in air conditioning systems for the chemical refrigerants R134a and R1234yf. It is powered by a geared motor. It is being utilised more frequently in electric vehicles with heat pumps. It can be utilised as a shut-off valve in addition to an expansion valve.
The electronic expansion valve (EEV) functions using a far more advanced design. Direct expansion evaporator refrigerant flow is regulated by EEVs.
They carry out this action in response to signals that an electronic controller sends to them. The valve port is opened and closed by a little motor. Step or stepper motor is the name of the motor. Step motors do not spin nonstop.
They rotate a fraction of a revolution for each signal delivered to them by the electronic controller, which controls them. A gear train that puts a pin in a port where refrigerant flows powers the step motor. An EEV with a step motor and drive assembly, cut away.
Step motors may move at a rate of 200 steps per second and swiftly return to their original position. The quantity of step signals sent by the controller is remembered by the controller.
As a result, the controller can always move the valve back to a former position. This allows the valve to control the flow of refrigerant through it very precisely. The majority of these EEVs have 1,596 control steps, each of which is 0.0000783 inches.
Global EV electronic expansion valve market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
The new Hilite eXV (electronic expansion valve), which is already available for other applications, will enter series production in China in December 2020. It is utilised specifically in PHEVs and BEVs (battery electric vehicles) (plug-in hybrids). Here, full battery systems’ active cooling is accurately regulated.
The eXV regulates the refrigerant flow through the heat exchanger (chiller) throughout the whole operating area in accordance with the operational needs.
This makes it possible for the HVAC/Heat Pump compressor to effectively cool active batteries. Under all circumstances, the highest battery performance—whether it is for vehicle range or quick charging—requires the cooling system to be functioning optimally.
The efficiency of the interior air conditioning (AC) can also be improved by using the eXV on the evaporator. The AC offers enormous CO2 savings potential as the biggest auxiliary consumer.
The built-in controller and LIN interface are used to communicate with the valve. Application-specific software features, such as diagnostics and command interfaces, are available.
