| 摘要 |
<p>PURPOSE: A heat pump is provided to improve heating performance and efficiency through multi-stage compression and injection by using an inner injection flow passage and mid-injection passage. CONSTITUTION: A heat pump comprises scroll compressors(10, 12), a condenser(20), an expansion unit(40), an evaporator(30), inner injection flow passages(50, 70), a mid-injection flow passage(60), and a control unit. The inner injection flow passages are separated with each other between the condenser and the expansion unit. The mid-injection flow passage is divaricated between the condenser and the expansion unit. The control unit controls the quantity of coolant passing through the inner injection flow passages and the mid-injection flow passage.</p> |
