The Advantages of Automatic Defrosting in Commercial Fridges
One of the most common automatic defrosting methods in commercial fridges is "hot gas defrosting". The principle behind hot gas defrosting is that high temperature, high pressure exhaust gases are directly injected into the evaporator through an electromagnetic valve or conversion device. This heats up the evaporator, melting the frost layer where it forms on the interior walls. The frost then automatically falls off. In other words, the system condenser becomes the evaporator, while the evaporator becomes the condenser.
The defrosting process is controlled by time settings and temperature regulation. The interior temperature is generally kept between a 1-2°C rise to ensure strict food safety standards are met.
In short, the fridge stops refrigeration during scheduled defrost cycles. The system is reversed, changing from cooling to heating, raising the interior temperature to 1-2°C. This is just enough to melt ice buildup without compromising frozen goods. The frost melts automatically, eliminating manual defrosting.
Key Benefits of Automatic Defrosting
- Temperature Control - Fridge evaporators don't contact food directly, allowing brief temperature spikes to melt frost before rapidly resuming cooling. Interior temperatures remain extremely stable, ensuring food quality.
- Convenience - Auto defrost cycles run when traffic is low, avoiding inconvenience. No manual defrosting needed.
- Cost Effective - Auto defrost fridges cost less than air-cooled models. As straight coolers, they also offer better humidity retention.