在工商企业的建筑物中采用热泵采暖具有显著的经济效果。有两种基本型式的热泵:“空气-空气”式和“空气-水”式。住房虽然大多使用热水采暖系统,但采用“空气-水”式热泵效果较好。为此,推荐一种能利用工作循环中的低温余热单独进行采暖和热水供应的泵。这就需要从结构上设法解决和致冷剂牌号的选择上加以考虑。R12致冷剂可以在较低功率条件下满足最高温度的(达55℃)要求。而R22则在较低温度下 The use of heat pump heating in buildings of industrial and commercial enterprises has a significant economic effect. There are two basic types of heat pumps: air-air and air-water. Although most homes use hot water heating systems, the use of air-water heat pumps is better. For this reason, a pump that can utilize the low-temperature residual heat in the work cycle to perform heating and hot water supply separately is recommended. This needs to be considered in terms of structural solutions and the choice of refrigerant grades. The R12 refrigerant can meet the highest temperature (up to 55°C) requirement at lower power conditions. R22 is at a lower temperature