ENVIRONMENTAL TEST DEVICE

PURPOSE:To eliminate a cold heat source instruments and reduce the capacity thereof, by a method wherein a heat retrieving coil is provided at the inlet side of an air- conditioning machine, load heat, generated from a testing machine, is collected by a hood, the hood is connected to the suction side of the air-conditioning machine and brine, whose heat is exchanged in a heat exchanger for a load, is introduced into the heat retrieving coil. CONSTITUTION:The air side heat exchanger of a testing machine 2 is operated as a condenser upon room cooling operation while the same heat exchanger is operated as an evaporator upon room heating operation. Upon the cooling operation, the heat of condensation is discharged from a cooling fan 9 and is collected by a collecting hood 10, provided above the testing machine 2, then, is introduced into the suction port 12 of an air-conditioning machine 11 and is cooled by a heat retrieving coil 13. The heat retrieving coil 13 receives the supply of brine, cooled in a heat exchanger 3 for a load by cold water, and is operated as a cooling coil to cool high-temperature air discharged out of the testing machine. Reverse operation is effected upon the heating operation and low-temperature air is preheated by the heat retrieving coil. The heat, generated from the testing machine 2, is cooled or preheated by the heat retrieving coil 13 in such a manner, therefore, it is not necessary to add the heat as a thermal load and energy for processing the heat may be saved.