Abstract: Methods and systems of the invention can determine the identity and quantity of analytes in a vapor. In preferred methods, a porous optical film is exposed to vapor which contains analyte. The porous optical film is heated and its optical response is monitored during heating. An optical response observed via heating can determine the identity and/or quantity of the analyte. In preferred embodiments, optical response during a thermal pulse is compared to a database of sensor responses that are characteristic of various analytes. Preferred methods are conducted a relatively low temperatures, for example below about 200° C. In preferred methods, a heating and cooling cycle produces a hysteresis curve in the optical response that is indicative of analytes. In preferred embodiments, a thermal reset pulse resets the porous optical film for later use and also provides an optical response that can be used for sensing.

Abstract: Methods and systems of the invention can determine the identity and quantity of analytes in a vapor. In preferred methods, a porous optical film is exposed to vapor which contains analyte. The porous optical film is heated and its optical response is monitored during heating. An optical response observed via heating can determine the identity and/or quantity of the analyte. In preferred embodiments, optical response during a thermal pulse is compared to a database of sensor responses that are characteristic of various analytes. Preferred methods are conducted a relatively low temperatures, for example below about 200° C. In preferred methods, a heating and cooling cycle produces a hysteresis curve in the optical response that is indicative of analytes. In preferred embodiments, a thermal reset pulse resets the porous optical film for later use and also provides an optical response that can be used for sensing.

Abstract: In a refrigerating machine, a reservoir heated by an electric motor driving a compressor contains oil up to certain level. The reservoir is fed with refrigerating liquid complemented with oil. The liquid vaporizes while oil falls down in the liquid state. A number of lubrification conduits connect individual bearings of the compressor with the reservoir above the oil level on the one hand and with the reservoir below the oil level through a micro-orifice on the other hand, so as to send to the bearings refrigerating gas loaded with an oil mist. The bearings are in fluid communication with the intake of the compressor.

Abstract: Refrigerant liquid containing a little oil dissolved is vaporized while cooling the motor and a portion of the vaporization products is sent into the bearings to be lubricated.The large excess of available heat permits dispensing with an oil recirculating pump and keeping in the motor casing, acting as a sump, the major part of the oil present.

Abstract: A super-heat detector of refrigerant gas comprises a semiconductor pressure sensor for detecting a pressure of the refrigerant gas in a refrigerating apparatus, a semiconductor temperature sensor for detecting a temperature of said refrigerant gas, and an operational controller which converts an output signal from said semiconductor pressure sensor to a value corresponding to a saturation temperature of said refrigerant gas pressure, and produces an output electrical signal corresponding to super-heat condition of said refrigerant gas by comparison between said corresponding value of the saturation temperature and said output from said semiconductor temperature sensor.