How Refrigerated Glass Display Cabinets Work

The working principle of the refrigerated glass display cabinet is mainly based on the cyclic work of the refrigeration system. The following is a detailed introduction to its working principle:
Composition of the refrigeration system
There is a refrigeration system inside the refrigerated glass display cabinet, which is usually composed of four main parts: compressor, condenser, expansion valve (or throttling device) and evaporator. These components work together to generate and maintain a low temperature environment inside the cabinet.

Working principle steps
1. Compressor work:
The compressor is a key component in the refrigerated display cabinet, responsible for sucking in and compressing the refrigerant.
During the compression process, the refrigerant changes from a low-temperature and low-pressure vapor state to a high-temperature and high-pressure gas state.

2. Condenser heat dissipation:
After the high-temperature and high-pressure gas refrigerant enters the condenser, it releases heat to the surrounding environment with the help of heat sinks or fans.
In this process, the refrigerant gradually cools and changes to a high-pressure liquid state.

3. Expansion valve regulation:
Before the liquid refrigerant enters the evaporator through the expansion valve, the expansion valve controls the flow and pressure of the refrigerant.
When passing through the expansion valve, the pressure and temperature of the refrigerant are further reduced to prepare for entering the evaporator.

4. Evaporator heat absorption:
After the refrigerant enters the evaporator, it absorbs the heat inside the display cabinet through the evaporation process.
During the evaporation process, the refrigerant changes from liquid to low-temperature and low-pressure vapor, and produces cold air at the same time.
This cold air is blown out to the interior space of the display cabinet through the evaporator channel to maintain the low temperature environment inside the cabinet.

5. Cyclic reciprocation:
After the evaporation process is completed, the refrigerant is sucked into the compressor again and the entire cycle process is restarted.
Through this cycle, the refrigerated display cabinet can continuously maintain a low temperature environment to extend the shelf life of food or other items.