Ejector-Based Heat Pump Valve Control for Heating and Cooling Modes

The ejector is designed to perform multiple functions: it enables heating mode by injecting refrigerant into the compressor suction port, recovers expansion work by utilizing pressure differential, and can operate in cooling mode when bypassed. This multi-functionality resolves the contradiction by allowing one component to serve multiple purposes rather than requiring separate systems for heating and cooling.

The system employs dynamically controllable electromagnetic valves (first, second, and third electromagnetic valves) that can open or close based on operational mode requirements. The controller dynamically switches valve states to redirect refrigerant flow, enabling the ejector to be integrated into or bypassed from the refrigerant circuit as needed, thus adapting system complexity to operational requirements.

The refrigerant flow control is segmented into multiple independent valve sections: a first electromagnetic valve controls flow to the ejector inlet, a second electromagnetic valve controls flow from the ejector outlet, and a third electromagnetic valve controls bypass flow. Check valves are placed at specific locations to prevent reverse flow. This segmentation allows precise control of refrigerant direction while isolating valve functions for easier maintenance and control.

The controller acts as an intermediary that coordinates the operation of multiple electromagnetic valves and check valves based on the desired operational mode. By centralizing control logic, the system manages the complexity of multiple valves through a single control unit that sequences valve operations to achieve heating or cooling modes without requiring complex mechanical linkages between valves.