I believe you may use two orifices to achieve what you have described. Just control the input area to each to adjust the amount of refrigerant flow. Using multiple orifices and lookup tables, you can build (from scratch) lots of different kind of valves. Many examples in Simscape foundation library uses this approach to model valves. For example: https://www.mathworks.com/help/physmod/simscape/ug/hydraulic-actuator-with-analog-position-controller-il.html It's in isothermal liquid domain but the idea is the same.
If you have access to later versions of Simscape, this EV thermal management example may be helpful for your application:
