heat-exchanging unit

例句：

1. 1.The heat-exchanging unit in the factory is designed to improve the efficiency of the cooling system.
   工厂中的热交换单元设计用来提高冷却系统的效率。
2. 2.The new heat-exchange unit has been installed in the heating system, significantly reducing energy consumption.
   新的热交换单元已经安装在供暖系统中，显著降低了能源消耗。
3. 3. The engineers are working on a design for a more efficient heat-exchange unit.
   工程师们正在研究一个更高效的热交换单元的设计。