Dual Discharge Ceiling Unit Cooler for MT/LT Cold Room

Dual Discharge Ceiling Unit Cooler for MT/LT Cold Room

Dual discharge ceiling unit cooler is a specialized air - cooling device designed for Medium - Temperature (MT) and Low - Temperature (LT) cold rooms. Its unique dual - air discharge structure enables more uniform air distribution, making it highly suitable for cold rooms with large spaces, irregular layouts, or strict requirements for temperature consistency (such as those used to store food, pharmaceuticals, and seafood).

The working process of the dual discharge ceiling unit cooler is closely integrated with the refrigeration system of the cold room, and its steps are as follows:

Heat Absorption by the Coil: The low - temperature and low - pressure refrigerant (such as R404A, R513A, or natural refrigerants like CO₂ for ultra - low - temperature LT rooms) flows into the coil. The warm air in the cold room (with a temperature of 0 - 10°C for MT and - 5 to - 18°C for LT) is drawn into the unit through the air return grille by the dual fans.

Air Cooling: When the warm air passes through the coil, the refrigerant inside the coil absorbs the heat in the air and vaporizes. The air is cooled to the target temperature (for example, 2 - 4°C for MT cold rooms storing vegetables and - 20 to - 25°C for LT cold rooms storing frozen meat).

Dual - Side Air Discharge: The cooled air is evenly discharged from the two air outlets on both sides of the unit. Due to the symmetrical air supply, the air can cover a wider area (the air throw distance is usually 5 - 8 meters per side, which is 30% - 50% larger than that of single - discharge units). This eliminates "dead zones" of air flow in large cold rooms.

Defrost Cycle: When the frost on the coil reaches a certain thickness (usually detected by a frost sensor or time controller), the defrost system is activated. For example, in hot - gas defrost, high - temperature refrigerant gas is introduced into the coil to melt the frost. The melted water is discharged through the drain pipe (the drain pipe in LT cold rooms must be equipped with electric tracing to prevent freezing and blockage).

Advantages for MT/LT Cold Rooms

Compared with single - discharge floor - mounted or ceiling - mounted unit coolers, this model has obvious advantages in adapting to the needs of MT and LT cold rooms:

Uniform Temperature Distribution: The dual - side air discharge creates a "cross - flow air field" in the cold room, which reduces the temperature difference in the room to ≤ 1°C (while the temperature difference of single - discharge units is usually 2 - 3°C). This is crucial for MT cold rooms storing fruits, vegetables, or dairy products (to prevent local over - ripening or freezing) and LT cold rooms storing frozen seafood or meat (to avoid partial thawing and quality degradation).

Space - Saving: Being installed on the ceiling frees up the floor space of the cold room. This is especially beneficial for MT cold rooms used for pallet storage (such as those in supermarkets) or LT cold rooms with large - volume freezing equipment.

Energy Efficiency: The combination of dual EC fans and a reasonable coil design reduces the overall energy consumption of the cold room. For example, in a 100 m³ MT cold room, using a dual discharge unit cooler with EC fans can save about 150 - 200 kWh of electricity per month compared to a single - discharge AC fan model.

Strong Adaptability to Large Spaces: It is suitable for cold rooms with a length of more than 10 meters or an area of more than 50 m². For example, in a 200 m³ LT cold room for frozen food storage, installing 2 - 3 dual discharge unit coolers can achieve full air coverage, while 4 - 5 single - discharge units may be required for the same effect.