Abstract: A refrigerator includes an evaporator, a defrost heater, a temperature sensor to detect a temperature associated with the evaporator, and controller to control the defrost heater. In response to a defrosting operation start time point arriving, the controller is configured to perform a defrost operation mode including a pre-defrost cooling mode, a heater operation mode, and a post-defrost cooling mode, perform a pulse operation mode in which the defrost heater is repeatedly turned on and off based on the heater operation mode, and change a magnitude of cooling power supplied in the post-defrost cooling mode based on an ON period of the defrost heater or a temperature of a cooling compartment in the pulse operation mode.

Abstract: One or more embodiments provide a heterogeneous test equipment interfacing apparatus. The heterogeneous test equipment interfacing apparatus includes a plurality of data intermediate apparatuses connected to a plurality of environment test chambers; and at least one computer apparatus interoperating with the plurality of data intermediate apparatuses. Each of the plurality of data intermediate apparatuses is configured to convert an electric signal received from at least one environment test chamber interoperating with a corresponding data intermediate apparatus from among the plurality of environment test chambers into a data signal based on an SNMP protocol, output the data signal and, output a control signal for controlling the at least one environment test chamber interoperating with a corresponding data intermediate apparatus according to an operation control instruction received from the at least one computer apparatus.

Abstract: One or more embodiments provide a heterogeneous test equipment interfacing apparatus. The heterogeneous test equipment interfacing apparatus includes a plurality of data intermediate apparatuses connected to a plurality of environment test chambers; and at least one computer apparatus interoperating with the plurality of data intermediate apparatuses. Each of the plurality of data intermediate apparatuses is configured to convert an electric signal received from at least one environment test chamber interoperating with a corresponding data intermediate apparatus from among the plurality of environment test chambers into a data signal based on an SNMP protocol, output the data signal and, output a control signal for controlling the at least one environment test chamber interoperating with a corresponding data intermediate apparatus according to an operation control instruction received from the at least one computer apparatus.