Demand response system

An induction heating cooking apparatus comprising:

• a load driving unit to drive a working coil heating a container;
• a receiving unit to receive a demand response (DR) level related to power rate information for each power unit;
• a storage unit to store output levels of individual DR levels;
• and
• a controller to confirm an output level corresponding to the DR level received through the receiving unit, change the output level established in the working coil to the confirmed output level, and control an operation of the load driving unit in such a manner that the working coil is operated at the changed output level.

An air-conditioner comprising:

• a load driving unit to drive a compressor;
• a receiving unit to receive a demand response (DR) level related to power rate information for each power unit;
• a storage unit to store temperature values of individual DR levels;
• and
• a controller to confirm a temperature value corresponding to the DR level received through the receiver, change a set temperature established in the air-conditioner to the confirmed temperature value, and control an operation of the load driving unit in a manner that the set temperature value of the air-conditioner reaches the changed temperature value.

A refrigerator comprising:

• a load driving unit to drive a compressor;
• a receiving unit to receive a demand response (DR) level related to power rate information for each power unit;
• a storage unit to store freezing-chamber temperature values of individual DR levels;
• and
• a controller to confirm a freezing-chamber temperature value corresponding to the DR level received through the receiver, change a set freezing-chamber temperature established in the refrigerator to the confirmed freezing-chamber temperature value, and control an operation of the load driving unit so that the freezing-chamber temperature value of the refrigerator reaches the changed freezing-chamber temperature value.

A refrigerator comprising:

• a load driving unit to drive a compressor;
• a receiving unit to receive a demand response (DR) level related to power rate information for each power unit;
• a storage unit to store compressor operation rates of individual DR levels;
• and
• a controller to confirm a compressor operation rate corresponding to the DR level received through the receiver, change a compressor operation rate established in the refrigerator to the confirmed compressor operation rate, and control an operation of the load driving unit so that the refrigerator is operated at the changed compressor operation rate.