Cold room condenser units: functions, causes of failure and maintenance in-depth analysis

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Cold room condenser units: functions, causes of failure and maintenance in-depth analysis

Function of condensing unit

A cold storage condensing unit is one of the key components used in refrigeration equipment, and its main function is to maintain low temperatures inside the cold storage unit to ensure that the stored items inside the cold storage unit (usually food, pharmaceuticals, or other temperature-sensitive items) are kept within the proper temperature range. Below are the main functions of a cold storage condensing unit:

1.Refrigeration: The main task of a cold storage condensing unit is refrigeration, which means that it lowers the temperature inside the cold storage unit by circulating a compressed refrigerant (usually Freon or ammonia). This ensures that the required low temperature environment is created and maintained inside the cold room.

2.Temperature Control: Cold storage condensing units have a temperature control feature that allows the temperature inside the cold storage unit to be adjusted as needed. This is critical for different types of stored items, as some items may require lower temperatures to extend their shelf life.

3.Dehumidification: The inside of a cold storage unit usually needs to be kept dry to prevent frost and ice formation. Cold storage condensing units help maintain proper humidity levels through the process of dehumidification.

4.Air Circulation: In order to ensure even temperature distribution throughout the inside of the cold room, cold storage condensing units avoid uneven heating and cooling by pushing the cooling air through the unit.

5.Compression: The compressor in a cold storage condensing unit is a key component responsible for drawing in the low-pressure refrigerant, compressing it, and then discharging the high-pressure refrigerant into the cooler.

6.Cooling: The refrigerant passes through a cooler, usually a cooling coil or condenser, to release heat. This allows the refrigerant to return to a low-pressure state, ready to re-enter the cycle.

7.Evaporation: The refrigerant passes through an evaporator, usually an evaporator coil inside the cooler, to absorb heat from the cooler. This causes the refrigerant to change from a liquid to a gas, completing the cycle.

8.Energy Efficiency: Modern cold storage condensing units are usually designed as high efficiency systems to ensure that energy consumption is minimized while maintaining the appropriate temperature. This helps to reduce running costs and minimize the impact on the environment.

9.Monitoring and control: Cold storage condensing units are often equipped with monitoring and control systems that monitor temperature, humidity and other key parameters. Operators can use these systems to adjust settings and ensure that the cold storage unit is operating under stable conditions.

What causes a condenser to go bad?

1.The condensing temperature is too high, which may be caused by insufficient cooling water, too high cooling water temperature, low vacuum of the cooling system, dryness, too much scale of the condenser and so on.

2.Condensing temperature is too low, may be due to insufficient amount of refrigerant in the system, cooling water temperature is too low or flow rate is too high, condenser scale is too much.

3.The current is too high, it may be caused by lack of phase, loose or not tight terminal, poor heat dissipation of condenser, half blockage of system, poor flow, low or abnormal voltage, lack of oil or insufficient oil lubrication, and so on.

4.Pressure is too low, may be due to the refrigerant is not enough, the pressure gauge is damaged, the pressure sensing fault, the system piping has a leak caused by the lack of refrigerant, the ambient temperature is low, the use of air cooling capacity is greater than the output of cooling capacity and so on.

5.High pressure may be due to lack of fluorine, poor heat dissipation, high ambient temperature, condenser fins are too dirty, pressure gauge failure, sensor damage, overcharging of refrigerant, the expansion valve opens too small.

6.Compressor oil consumption, may be due to too much refrigerant, return pipe half blocked, return oil system guard installation does not meet the requirements, oil separation damage, part of the unit has a leakage loss, refrigerant impurity or quality change and so on.

7.The host does not start, may be due to the fuse is bad, wiring contact is bad, overload protector jump open, power supply no power, not reset, the controller's own problems, AC contactor failure, switch failure and so on.

Maintenance and cleaning of the cold storage condenser unit

1.Regular inspection: Conduct weekly appearance checks on the cold storage unit to ensure that there is no abnormal noise, vibration or leakage in the unit. At the same time, check whether the wiring of the electrical parts is firm and whether the control panel works normally.

2.Cleaning and disinfection: according to the storage requirements of the cold storage goods, clean and disinfect the cold storage unit regularly. Especially for goods that are easily contaminated, they should be cleaned once every quarter or half a year. When cleaning, use neutral detergent and make sure the residue after cleaning is thoroughly removed.

3.Maintenance: Replace the oil, filter and other consumable parts of the cold storage unit regularly according to the manufacturer's recommendations. At the same time, check whether the pressure and temperature of the refrigerant are within the normal range, and clean and maintain the condenser, evaporator and other parts.

4.Safety inspection: Conduct a comprehensive safety inspection of the cold storage unit every year, including electrical safety, refrigerant piping and pressure vessel. The inspection should be carried out by professionals to ensure the safety and reliability of the unit.

5.Records and reports: Records of routine maintenance and upkeep of the cold storage units should be kept and reported to the supervisor on a regular basis. These records should include maintenance time, work content, inspection results, etc. to facilitate tracking and management.

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