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近年来国外在应用皮带轮改变风机转速方面取得了一些进展,下面介绍其中几种。一、日立空调机变速皮带轮目前国内外生产的大多数空调机组的风机转速是一定的。但是同一台空调机组在不同场合使用时,对于风机的风量、风压往往会有不同的要求。例如,同样冷量的空调机有的需要外接风管,有的不需要。在需要外接风管时,有的需要较长的风管,有的只需
In recent years, foreign countries have made some progress in the application of pulleys to change the fan speed. Several of them are described below. First, Hitachi air-conditioner transmission pulleys The current domestic and foreign production of most air-conditioning unit fan speed is certain. However, when the same air-conditioning unit is used on different occasions, there are often different requirements for the air volume and air pressure of the fan. For example, some air conditioners with the same amount of cooling need external air ducts, and some do not. When an external air duct is needed, some need a longer air duct, and some need only