
How to Defrost Commercial Chiller or Chiller Fridge?
Defrosting a commercial refrigerator or chiller freezer is a common maintenance task, especially for direct cooling models. Unlike air-cooled systems that prevent frost buildup, direct cooling systems tend to form frost or even ice due to their unique cooling mechanism.
Let’s dive into the causes of frost formation and effective defrosting methods to maintain optimal performance for your commercial refrigerators, display chillers, or chiller freezers.
Why Does Frost Form in a Direct Cooling Commercial Refrigerator?
The direct cooling system relies on an evaporator inside the refrigerator to transfer heat from the air. Here’s how it works:
- Heat Exchange: The evaporator absorbs heat from the surrounding air, lowering the air temperature.
- Air Circulation: Cooled air descends due to higher density, while warmer air rises, creating a continuous cycle of cooling.
- Frost Formation: When the warm air comes into contact with the cold inner walls of the refrigerator, moisture condenses and freezes, gradually forming frost or ice.
This frost buildup can affect the efficiency of the refrigerator, making periodic defrosting essential.
Practical Tips to Defrost Your Refrigerator or Chiller Freezer
Method 1: Use Hot Water for Quick Results
- Turn Off the Power: Unplug the refrigerator to ensure safety.
- Remove Stored Items: Take out all food items and store them temporarily in another cooler or refrigerator.
- Place a Hot Water Container: Use a heat-conductive container (such as one made of aluminum or iron) filled with hot water (60-70°C).
- Close the Door: Leave the hot water inside and close the refrigerator door for about 10 minutes.
- Wipe Away Frost: Open the door, remove the container, and wipe off the melted frost with a cloth.
- Optional Tip: Apply a thin layer of vegetable oil to the inner walls to make future defrosting easier.
Method 2: Use a Fan or Hair Dryer for Faster Defrosting
- Turn Off the Power: Unplug the unit and empty it of food.
- Set Up an Electric Fan or Hair Dryer: Position the fan or hair dryer to blow directly onto the frosted areas.
- Monitor the Process: As the frost melts, wipe it away with a cloth.
- Note: This method is time-consuming and requires constant supervision, so it may not be the most efficient option.
Method 3: Prevent Frost with Plastic Wrap
- Line the Inner Walls: Before loading the refrigerator with food, apply a layer of plastic wrap or cling film to the interior surfaces.
- Simple Removal: When frost builds up, peel off the plastic wrap, taking the frost with it. This method minimizes cleaning effort during defrosting.
Why Regular Defrosting Matters
- Improved Cooling Efficiency: Frost can obstruct airflow, reducing the refrigerator’s performance.
- Energy Savings: A defrosted unit consumes less energy to maintain the desired temperature.
- Prolonged Lifespan: Regular maintenance ensures the longevity of your commercial refrigerators and display chillers.
By following these tips, you can effectively maintain your commercial refrigerators, ensuring they stay efficient and frost-free. Defrosting is an essential part of keeping your refrigeration equipment running smoothly for your business needs.
For more insights on maintaining display chillers, chiller fridges, or freezer units, stay tuned to our blog!