Abstract: A compression system for an air conditioning system includes first and second compressors. The first compressor includes a first compression chamber in which a fluid introduced from an outside of the first compressor is compressed, and a first case defining a first space into which the fluid compressed in the first compression chamber is introduced. The second compressor includes a second case defining a second space into which the fluid compressed in the first compressor is introduced, and a second compression chamber in which the fluid introduced from the second space is compressed. The second compressor operates independently of the first compressor, and a connecting line connects the first and second compressors.

Abstract: An object of the present invention is to suppress to a sufficiently small level variation in the temperature of an object in a case where the temperature of an object is controlled to a desired value using heat transfer fluid. A controller (9) controls the power of a thermoelectric conversion device (6) which is used for cooling or heating heat transfer fluid supplied to an object (5). The controller (9) performs a feedback control operation using the temperature (T1) of the heat transfer fluid emitted from the thermoelectric conversion device (6) and the temperature (Ts) of the object. In this feedback control operation, the difference between the object temperature (Ts) and the heating medium temperature (T1) is added to a set temperature (SV), whereby a target temperature of the heating medium temperature (T1) is calculated.