Haocool
Project Background
Perfect (Guangdong) needed a specialised cold storage facility for their daily goods, including fruit, bananas, raw materials for daily chemicals, and juice. The entire project covers 400 square metres and is located in the basement (negative first floor). The clear height of each room is 3 metres.
The facility consists of four separate cold rooms:
- Fruit fresh‑keeping room: 0°C to 10°C (adjustable)
- Banana ripening/constant‑temperature room: 12°C
- Raw material storage (daily chemicals): 0°C to 10°C (adjustable)
- Juice storage room: -10°C to 10°C (adjustable)
All four rooms are explosion‑proof, which means strict requirements for electrical components, lighting, and control systems.
Construction & Insulation
Panels and doors
- Fire safety: All insulation panels and cold room doors must meet B1 flame‑retardant rating.
- Panel thickness:
- Juice room: 150mm polyurethane (extra insulation for negative temperature)
- Other three rooms: 100mm polyurethane (sufficient for 0–12°C operation)
- Floor: Concrete slab with wear‑resistant diamond hardener (finished by our team). Some concrete work outside the cold rooms was also done by us.
Location challenges
Since everything is in the basement, material delivery, panel assembly, and equipment placement required careful planning. Adequate ventilation and drainage were also considered to meet explosion‑proof standards.
Refrigeration Equipment
All compressors are Emerson Copeland (a trusted global brand). They are placed on ground level (first floor), not in the basement, to simplify maintenance and reduce noise inside the storage area.
- The banana room (set to 12°C) has a larger condenser than standard. Bananas give off ethylene and need stable temperature with good air circulation, so the condenser size was increased to handle the load efficiently.
- Other rooms use appropriately sized condensing units matched to their temperature range.
Control System
PLC and monitoring
- PLC controller: Siemens brand
- Touchscreen: Siemens, with a manual backup control system in case of automation failure.
- Humidity monitoring: Each room has a temperature/humidity probe (with calibration certificates provided). The control cabinet displays real‑time humidity data.
- Central supervisory computer: A central PC monitors all four rooms remotely, logs data, and raises alarms if parameters go out of range.
Explosion‑proof features
All electrical components inside the cold rooms – including lights, sensors, and control boxes – are explosion‑proof. The system is designed to prevent any spark or arc that could ignite flammable vapours from daily chemicals or fruit ripening gases.
Current Status
The cold storage project has been completed, commissioned, and handed over to the Perfect (Guangdong) team. All rooms are running within their specified temperature ranges, and the humidity control is stable.
Construction Photos
Final Thoughts
This 400m² explosion‑proof cold storage for Perfect (Guangdong) is a good example of a multi‑temperature, basement‑type facility. The combination of B1‑rated panels, Copeland compressors, Siemens PLC controls, and careful attention to explosion‑proof requirements makes it both safe and reliable for daily goods and food storage.
If you are planning a similar project – especially with multiple temperature zones, basement installation, or explosion‑proof needs – a well‑thought‑out design and proven equipment are essential.
Note: Project executed by Haocool Refrigeration. All photos and data are shared with the client’s permission.