refrigerant heater

例句：

1. 1. Thenew refrigerator has a built-in refrigerant heater that keeps the food fresh.
   这款新冰箱内置了制冷剂加热器，能保持食物新鲜。
2. 2.The office needed a refrigerant heater to keep the air conditioning running smoothly.
   办公室需要一台制冷剂加热器来让空调运行顺畅。
3. 3. The engineer installed a new refrigerant heater in the factory's cooling system.
   工程师在工厂的冷却系统中安装了一台新的制冷剂加热器。