无管微型热泵在亚洲得到广泛应用，但到目前为止，它在美国的市场份额相对较小，只占供热和制冷系统安装的5%左右。鉴于与传统的空气源热泵相比有许多关键优势，这种情况可能会改变。这两种系统的工作原理相同。最大的区别在于空调空气的分布。对于传统的空气源热泵，室外冷凝器/压缩机为中央室内蒸发器/空气处理器提供加压制冷剂。空调空气通过管道吹到各个房间。在一个没有管道的系统中，室外机通过一个小直径的管道为多达8个独立的室内机提供制冷剂。没有管道。每个室内单元都可以单独控制，因此对住宅不同区域的冷暖管理相对简单。最著名的系统之一是三菱制造的Mr. Slim，但无管超薄型由多家公司生产，包括富士通(Fujitsu)、LG、Frigidaire、Friedrich、Lennox和其他一些公司。 Ductless minisplits often are promoted primarily as an easy way of adding air conditioning to homes without ductwork.This is true, but they also can provide heat. They are an increasingly popular choice for high-efficiency houses with low heating loads. Advantages of going ductless Eliminating the need for ducts saves money, and a ductless system also is less disruptive during a renovation. In a ductless system, a 3-inch-diameter conduit provides enough room for the refrigerant piping, control wires and a drain for condensate. A simple system that includes an outdoor unit and a few indoor heads can be installed quickly, with little of the construction headaches associated with a conventional system. Ducts also are inherently wasteful.…