The present invention relates to the cooling and heating dual-purpose air conditioner, and more particularly to the heat pump type cooling and heating dual-purpose air conditioner wherein the stand-by control is performed in order to prevent the viscosity increases caused by the lubricating oil freeze...http://www.google.fr/patents/US5195327?utm_source=gb-gplus-shareBrevet US5195327 - Compressor drive control method for cooling and heating dual-purpose air conditioner
Compressor drive control method for cooling and heating dual-purpose air ...
