US Patent 11448425 Open-loop natural thermal energy releasing system with partial reflux

An open-loop type heat equalization device utilizes a heat exchange fluid as the carrier to transmit the thermal energy of a natural thermal energy storage body to an temperature differentiation body. The system includes an inclined or vertical heat gaining device that exchanges thermal energy with the natural thermal energy storage body, and first and second pipeline structures through which the fluid flows by convection or auxiliary pumping to the temperature differentiation body. The first pipeline system includes an outwardly-expanded arc-shaped fluid chamber and has a relatively larger volume than the second pipeline system to provide differential resistance to fluid flow at opposite ends of the heating gaining device.