What is the differnce between heat engine and refigerator .

Explanation

Differnces between heat engine and refrigerator :
Refrigerator extracts heat energy from sink i.e., from low temperature body will the help of external work and delivers heat energy to high temperature body called source .
A heat engine will absorb heat energy from source and reject heat energy to the sink . heat engine will work in a reversible process but the refrigerator works in the reverse process of heat engine .