FNH Series Condensing Units: Open Structure Adapts to Diverse Refrigeration Needs

Working Principle and Structural Design

● The FNH series condensing unit is a type of air - cooled condenser, a heat dissipation device matched with Freon refrigeration equipment and using air for cooling. When it works, the Freon refrigerant flows in the coil. Through the close combination of copper tubes and fins, heat is transferred to the fins. Then, the fan drives the air to flow, taking away the heat on the fins, thus achieving the cooling and condensation of the refrigerant.

● The FNH - type condenser adopts a copper tube and aluminum fin structure. The coils are arranged in a staggered way with copper tubes, and mechanical expansion tubes are used to make the copper tubes and fins closely combined. The shell is made of galvanized sheet with plastic spraying, which is beautiful, durable and corrosion - resistant. It is matched with low noise motors, featuring low noise and an attractive appearance. It supports horizontal blowing or suction - type design, is suitable for fully enclosed and semi - enclosed compressors, and can be assembled into a compression Condensing Unit. Its heat dissipation area ranges from 2 to 350 square meters, and the matching cooling capacitycan be matched as needed.

HT - FNH Series Condensers

What Are the Advantages of Using the FNH  Condenser Units?

The FNH series condensing  have prominent advantages such as high heat exchange efficiency, low noise, strong applicability, and convenient installation.

1. Efficient Heat Dissipation: It adopts high - efficiency heat exchange coils, which are clean and dry. The aluminum fins are punched into "L" - shaped extended fins, which are in close contact with the copper tubes after tube expansion, resulting in high heat exchange efficiency. The coils are arranged in a staggered or parallel way with copper tubes, and mechanical tube expansion is used to further enhance the combination degree of copper tubes and fins, making the heat exchange effect better.

2. Reasonable Structural Design: The FNH type adopts a side blowing form, with a reasonable design width. The distance between the fan blades and the aluminum fins is more than 1/3 of the diameter of the fan blades, ensuring that there is sufficient windward area during operation, which can effectively improve the heat dissipation efficiency.

3. Low - Noise Operation: All use large - air - volume and low - speed motors. The noise generated by these motors during operation is relatively small, and they can be widely matched with refrigeration equipment with high noise requirements, which can better meet the needs of some quiet places.

4. Strong Corrosion Resistance: The shell is standardly made of galvanized spray - painted sheet, and stainless steel sheet and aluminum - magnesium alloy configurations are optional. It has the characteristics of corrosion resistance, durability and beautiful appearance, can adapt to different use environments, not only prolongs the service life of the equipment, but also keeps the appearance beautiful.

5. Convenient and Reliable Installation: The product has undergone air tightness test and system sewage discharge treatment, which ensures the tightness and cleanliness of the equipment during operation, reduces the possibility of failure, and improves the safety and reliability of the equipment. The overall structure is designed reasonably, and the installation is not restricted by the area. It only needs a small area for installation, and is usually installed as a whole. While having a beautiful appearance, it can also avoid collision damage, and has good protection after installation.

What Are the Precautions in Daily Use?

1. Pre-operation Preparation

Operators shall first read through the equipment technical manual and instruction manual carefully to have a clear understanding of core information such as rated pressure and heat exchange process, so as to avoid misoperation. Meanwhile, check key components: see if the flange bolts are loose and if the sealing gaskets have cracks or deformation to prevent medium leakage; the condenser fins shall be free from dust blockage. If there is blockage, use compressed air with a pressure of 0.4 - 0.6MPa to blow and clean them. In addition, the area where the equipment is placed shall be well - ventilated and free from open flames and accumulated water. Operators must wear work clothes, safety helmets, protective glasses and corresponding gloves.

2. Monitoring During Operation

Keep a close eye on core parameters in real time: the condensing pressure of the water - cooled type shall not exceed 1.5MPa, the temperature difference between the inlet and outlet of cooling water shall be controlled within 2 - 4℃, the condensing temperature shall be 3 - 5℃ higher than the outlet temperature of cooling water, and the operating current of the motor shall be within the rated range. Pay attention to the equipment status. Normally, the equipment should make a stable running sound without sharp abnormal noise or high - frequency vibration. If any abnormality is found, stop the equipment immediately for troubleshooting. The cooling system shall be maintained regularly. For the water - cooled system, check the opening degree of the water inlet valve and the filter; for the air - cooled system, use compressed air to blow and clean the fins every week. Over-temperature, over-pressure operation of the equipment or violent knocking on it is strictly prohibited.

3. Shutdown and Maintenance

When shutting down the equipment, first turn off the compressor and keep the cooling water pump running for more than 3 minutes. If the equipment is out of service for a long time in winter, drain all the water in the system to prevent freezing and cracking. Finally, close the valves, clean the area and keep records. During daily maintenance, for regular cleaning, rinse the equipment in the reverse direction with clean water or clean it with non - corrosive chemical agents; for in - depth cleaning, metal brushes are forbidden. Check for leakage (for the fluorine system, check for oil stains), fans and circuits every month; check the bolts every quarter. If the sealing gaskets are aged, replace them in time.

（Note: The translation is based on the functional description of general condensing units and the professional expression habits in the mechanical equipment industry. If there are special technical definitions or brand - specific terms for the FNH series condensing unit of Shaanxi Yuansheng Hetong, it is recommended to further confirm with the official technical documentation of the enterprise for more accurate consistency.）