A queen valve is the service valve (isolation valve) located at the inlet of the liquid receiver (between the condenser outlet and the liquid receiver). The king valve is the service valve at the outlet of the liquid receiver (between the liquid receiver and the liquid line). Queen valves seem to be in use much less than king valves.
I assume you meant to say "Where is a king valve in refrigeration?" Anyhow, it is usually located downstream from a liquid line receiver.
The pressure in a refrigeration system changes in the compressor, condenser, expansion valve, and evaporator. In the compressor, the pressure increases, while in the condenser, it remains high before decreasing in the expansion valve and evaporator.
Evaporator is not a basic component of the compression refrigeration cycle. The basic components are compressor, condenser, expansion valve, and evaporator.
the reversing valve is what actually changes the refrigeration cycle from heat to cool. the reversing valve receives its signal from the thermostat.
In a refrigeration system, pressure is changed primarily at the compressor and the expansion valve. The compressor increases the pressure of the refrigerant vapor, raising its temperature and allowing it to release heat in the condenser. After the refrigerant condenses into a liquid, it passes through the expansion valve, where pressure is drastically reduced, allowing it to evaporate and absorb heat in the evaporator. This cycle of pressure changes is crucial for the refrigeration process.
king valve
A piercing valve is a valve with a pointed sharp tip that is used to gain access to a sealed refrigeration system that does not have service valves or Schroeder ports. And is to be used as a temporary device .
Liquid refrigerant charging of a system is normally accomplished in the liquid line. For example, when a system is out of refrigerant, liquid refrigerant can be charged into the king valve on the liquid line or receiver.
An engine cannot replace an expansion valve in a vapor compression refrigeration cycle because their functions are fundamentally different. The expansion valve is designed to reduce the pressure of the refrigerant, allowing it to expand and cool before entering the evaporator. In contrast, an engine converts thermal energy into mechanical work, which would not facilitate the necessary pressure drop or temperature reduction required for effective refrigeration. Additionally, using an engine would complicate the system and introduce inefficiencies that could hinder cooling performance.
Vapor compression in the refrigeration cycle is the process which turns heated vapor into a cold liquid. This allows the coolant to flow through the condenser and cool the air.
Tonne of refrigeration(TR) is the practical unit of refrigeration effect.Tonne of refrigeration(TR) is defined
Once the fluid travels through the radiator on the back of the refrigerator, the valve will open and use the force of the piston retracting to suck the fluid into the compressor, where the pressure will cool the refrigerant over again.