The migration of the refrigerant into a non-functioning refrigeration system is one of the main causes of oil dilution.

The most common problems regarding lubrication are: oil dilution, lowering of oil level and loss of viscosity due to excessive heating of the compressor. Oil dilution is certainly the most common problem in refrigeration systems.

Let us first examine the mechanical failures caused by liquid shots. Disassembling a compressor, for example, showed that the intake valve was damaged following an attempt to compress coolant or oil, or both.

A German team has developed a device that acts as an air conditioner and heat pump, thanks to a metal alloy 'equipped with memory'.

A group of German researchers has developed a heating and cooling system that has twice the