| abstract |
The invention relates to a method for conditioning air in a thermally insulated test space which can be closed with respect to an environment, a test chamber for housing a specimen, and a chamber for 'trial. A temperature is formed in a temperature range of -20 ° C to +180 ° C within the test space by means of a cooling device (10) of a temperature control device of the chamber for testing, the cooling device being provided with a cooling circuit (11) comprising a refrigerant, a heat exchanger (12), a compressor (13), a condenser (14) and a an expansion member (15). The refrigerant on the high pressure side is cooled by means of an internal heat exchanger (19) of the cooling circuit, connected to a high pressure side (17) of the cooling circuit upstream of the expansion member and downstream capacitor in a flow direction, and a low pressure side (18) of the cooling circuit in a flow direction upstream of the compressor and downstream of the heat exchanger. A zeotropic refrigerant is used as the refrigerant, cooling of the refrigerant on the high pressure side being used by means of the internal heat exchanger to lower an evaporation temperature on the expansion member. |