EV Heat Pump HVAC Damper and Throttle Layout for Harsh Temperatures

The system performs preliminary cooling or heating of the ventilation system before the vehicle starts moving, as described in the background. This preliminary action improves initial comfort but is insufficient for harsh environments. The patent extends this by adding multiple throttle branches that enable sustained refrigerating/heating effects even in high-temperature (50°C+) or low-temperature (−10°C−) conditions by allowing direct refrigerant circulation paths.

The system dynamically switches between different operational modes using multiple throttle branches (first throttle branch, second throttle branch, third throttle branch, fourth throttle branch) controlled by switch valves. This dynamic configuration allows the system to adapt to different environmental conditions, providing both refrigerating and heating functions effectively, even in harsh environments without relying on excess engine heat.

The system segments the refrigerant circulation path into multiple independent throttle branches (first throttle branch with first switch valve, second throttle branch with second switch valve, third throttle branch with third switch valve, fourth throttle branch with fourth switch valve). Each branch can be independently controlled to optimize system performance for different operating conditions, improving reliability while maintaining manageable complexity through modular design.

The patent merges the plate heat exchanger with the motor cooling system, allowing the refrigerant to exchange heat with the motor cooling fluid. This integration enhances heating efficiency by utilizing the motor cooling system as a heat source. The design facilitates mass production by creating a unified system that can be manufactured as an integrated assembly, reducing installation complexity despite the enhanced functionality.