Patent ID: 7415836

Claim:
In combination: a) an electronic device; and b) an environmental tester for a space within which the electronic device is at least one of made, inspected, evaluated and operated, the environmental tester comprising a cooling apparatus, the cooling apparatus comprising: a compressor, a condenser, an expansion device, and an evaporator, all connected to each other in this order by a piping line to form a refrigeration circuit, the compressor being constructed to compress a refrigerant in a gaseous phase before it is delivered to the condenser where a quantity of heat is removed from the refrigerant so as to change the refrigerant into a liquid phase or into a gas-liquid mixture, and the refrigerant being then fed to the evaporator through the expansion device and subsequently returned to the compressor, the cooling apparatus further comprising a heating section interposed between the evaporator and the compressor, wherein the refrigerant leaving the evaporator is still the gas-liquid mixture until heated by and completely gasified in the heating section, wherein the cooling apparatus further comprises a regulator located between the evaporator and the compressor for controlling flow rate or pressure between the evaporator and the compressor.