The freezer has a large sales volume in the global market, with sales exceeding 10,000 in January 2025. It is the core equipment of the food, pharmaceutical, chemical and other industries. Do you find that its performance directly affects product quality and operating costs? However, you often only focus on the cooling effect and procurement costs, but ignore the details of daily maintenance, resulting in shortened equipment life, increased energy consumption and even sudden failure.
NW (nenwell company) summarizes 10 easily overlooked maintenance points for the use environment in different regions of the world to help users achieve efficient maintenance:
First, the condenser: the “heart” of the cooling system
The problem is that the condenser is located at the back or bottom of the freezer and is responsible for heat dissipation. Daily use can cause dust, hair, and oil to accumulate, which can reduce heat dissipation efficiency, increase cooling power consumption by 20% to 30%, and even cause compressor overload.
Global differences:
Dusty areas (e.g. Middle East, Africa) require monthly cleaning.
Kitchen environment (catering industry): The adhesion of oil fumes will accelerate the aging of the condenser. It is recommended to rinse with a high-pressure water gun every week.
Solution:
Use a soft brush or vacuum cleaner to avoid scratching the heat sink with sharp tools.
Second, the sealing strip: the neglected “insulation defense line”
Question:
The aging and deformation of the sealing strip can lead to leakage of cooling capacity, soaring electricity bills, and may also cause serious frosting in the cabinet.
Global differences:
High humidity areas (such as Southeast Asia, South America): Sealing strips are prone to mold growth and require regular disinfection with neutral detergents.
Extreme cold regions (e.g., Northern Europe, Canada): Low temperatures can harden the seals, and it is recommended to replace them annually.
Solution:
Check the tightness every month (you can clip a piece of paper to test), and apply Vaseline to the edge to extend the life.
Third, temperature monitoring: the misunderstanding of “one size fits all” setting
Question:
Global users often fix the temperature at -18 degrees Celsius, but do not consider the impact of door opening frequency, storage type (e.g. seafood – 25 degrees Celsius), and ambient temperature.
Scientific method:
High temperature season (ambient temperature > 30 ° C): Increase the temperature by 1-2 ° C to reduce the compressor load.
Frequent opening and closing of doors (e.g. supermarket freezers): Use smart thermostats to automatically compensate for cooling loss.
Fourth, defrosting: a manual “time trap”
Question:
Although the frost-free freezer automatically defrosts, the blockage of the drain hole will cause the accumulated water to freeze; the direct-cooled freezer needs to be defrosted manually, and the ice layer thickness > 1cm needs to be treated, otherwise it will affect the cooling efficiency.
Global case:
Japanese convenience stores use timed defrosting + hot air circulation technology to reduce defrosting time to 15 minutes.
V. Interior Layout: The Cost of “Space Utilization”
Misunderstanding:
Stuffing will hinder the cold air circulation and increase the local temperature. Leaving 10cm space at the top and a tray at the bottom (anti-condensation corrosion) are the keys.
Global norms:
The European Union standard EN 12500 requires that the interior of the freezer be marked with an airflow passage identification.
VI. Voltage stability: the “Achilles heel” of developing countries
Risk:
Voltage fluctuations (± 20%) in regions such as Africa and South Asia can cause compressors to burn out.
Solution:
Configure the automatic voltage regulator or UPS power supply, and enable the energy saving mode when the voltage is unstable.
VII. Humidity control: “invisible demand” for pharmaceutical/biological samples
Special Scenario:
Medicine and laboratory freezers need to control the humidity by 40% to 60%, otherwise the sample will be easily freeze-dried or damp.
Technical solution:
Install a humidity sensor with a moisture-proof heater (as standard with the American Revco brand).
Eight.Regular professional maintenance: the limitations of “DIY”
Neglect:
Refrigerant leakage: requires an electronic leak detector to detect, making it difficult for non-professionals to detect.
Compressor lubricating oil: more than 5 years of equipment needs to be replenished to extend the lifespan by 30%.
Global service:
Brands such as Haier and Panasonic offer annual all-inclusive maintenance packages, covering more than 120 countries.
Nine, maintenance log: the starting point of data management
Suggestion:
Record daily energy consumption, defrosting frequency, fault codes, and identify problems in advance through trend analysis.
Decommissioning: the “last mile” of environmental protection and compliance
The European Union’s Waste Electrical and Electronic Equipment Directive (WEEE) requires the recovery of refrigerants and metals.
China’s “Home Appliances Trade-in Implementation Measures” subsidy compliance.
Operation guide:
Contact the original factory or a certified recycling agency, and it is strictly forbidden to disassemble it yourself.
The core of freezer maintenance is “prevention is the priority, details are king”. By paying attention to the above 10 details, global users can extend the life of the equipment to 10-15 years and reduce the average annual maintenance cost by more than 40%. Maintenance requires attention to details!
References:
International Institute of Refrigeration (IIR) Maintenance Standards for Commercial Refrigeration Equipment
ASHRAE 15-2019 “Refrigerant Safety Specification”
Post time: Mar-24-2025 Views: