What is the reverse Carnot Cycle?

Hint: Let us first get some idea about the Carnot Cycle. The Carnot cycle is a theoretical ideal thermodynamic cycle proposed by French scientist Nicolas Léonard Sadi Carnot in \[1824\] and further developed by others during the following decades. It establishes an upper limit on the efficiency of any classical thermodynamic engine in converting heat into work, or, conversely, the efficiency of a refrigeration system in producing a temperature difference by applying work to the system. It is a theoretical construct rather than a real thermodynamic cycle.

Complete step by step solution:
Let us know a little more about the carnot cycle. Every thermodynamic system exists in a specific state. A thermodynamic cycle occurs when a system is put through a succession of various states before being returned to its initial condition. The system may perform work on its surroundings while cycling through this cycle, for example, by moving a piston and serving as a heat engine. A Carnot heat engine is a system that goes through the Carnot cycle, albeit such a "perfect" engine is simply a theoretical construct that cannot be produced in practise.
The directions of heat and work interactions are reversed when the Carnot cycle is reversed. A Carnot refrigerator or heat pump is a refrigerator or heat pump that operates on the reversed Carnot cycle.

The reversed Carnot cycle, which operates between two temperature levels, is the most efficient refrigeration cycle. It establishes the theoretical maximum COP.

Note:
For a particular temperature limit, it has the highest efficiency. All four stages can be reversed because it is a reversible cycle. As a result, the direction of heat and work interactions will be reversed, resulting in a refrigeration cycle.