ENVIRONMENT TESTING DEVICE AND METHOD FOR PRODUCING SAME

摘要

Disclosed is an environment testing device wherein the air conditioning for the inside of a container can be easily controlled while the consumption of energy is suppressed. The environment testing device has a natural circulation refrigerant circuit (100) in which the heat transfer naturally occurs in accordance with the temperature difference between the inside and the outside of an insulating container (2), and a compressor for compressing the refrigerant, and the environment testing device is also provided with a freezing machine (6) which transfers the refrigerant to a refrigerant supply pipe (62), to cool the inside of the insulating container (2). A control unit (10) reduces the cooling capability exhibited by the freezing machine (6) on the basis of the results detected by a dry-bulb thermometer (11) and a wet-bulb thermometer (12) when the conditions of the temperature and relative humidity within the insulating container (2) are conditions at which the cooling capability exhibited by the natural circulation refrigerant circuit (100) is relatively high.