Air Cooler / Evaporator / Condenser
Square Technology’s air cooler delivers smooth, uniform cooling performance, making it the ideal solution for processing workshops requiring precise temperature control. Designed to maintain low temperatures in food processing areas, our air coolers are constructed from the highest quality materials to ensure superior cooling efficiency and durability.
Heat exchangers integrated into product portfolio in 2018.
Products meet international standards for quality and performance.
Wide range of fin/tube-type air heat exchangers for diverse industries.
Modern, 38,000-sq-m manufacturing facility with advanced machinery.
Used in cold storage, distribution centers, supermarkets, hospitals, data centers, and more.
Product Features
Why Choose Square's Air Cooler | Evaporator | Condenser
Explore the key product features, including Ceiling-Mounted Air Cooler, Dual Coil Air Cooler, Compact Commercial Air Cooler, and the engineering advantages behind this system.
Ceiling-Mounted Air Cooler
A standard ceiling-mounted air cooler for common applications. Widely used in cold storage, cold chain distribution centers, supermarkets, etc.
Dual Coil Air Cooler
Ideal for processing workshops requiring air conditioning. Maintains low temperatures in food processing areas with smooth and uniform air circulation. Workers are not directly exposed to chilled air as circulation is along the ceiling.
Compact Commercial Air Cooler
Our ceiling-mounted air cooler is ideal for small spaces like catering, retail, and gas stations. It delivers reliable cooling at temperatures above and below zero degrees. The air cooler operates quietly and offers a cost-effective cooling solution, perfect for businesses looking to maintain a comfortable environment while saving space and money.
Tailored Heat exchanger
Customized to meet specific requirements and applications. We offer coils with a variety of tube diameters, tube patterns, fin profiles, materials, and options to meet unique needs.
Fan
High volume, long air throw, low noise, energy-efficient Electrical heater provided to prevent frost Fan diameter: 250 to 910 mm EU energy-saving ERP compliant
Coil
Tube material: Copper, SS, Aluminum Fin material: Aluminum, Al-Mg alloy, copper Fin pitch: 4, 7, 10,12mm. DX or pump. Excellent cooling performance, optimal refrigerant circulation design
Casing
SS, powder coated Easy to clean: Unfoldable drip pan Safety:100%pressure tested
Defrosting
Options Combined defrosting
Technical Specifications
Parameters
Air cooler, evaporator, and condenser parameters cover coil material, fin spacing, airflow, capacity, refrigerant circuit, fan type, defrost method, casing, drainage, and control options.
| Product types | Air coolers (unit coolers) / Evaporators (process) / Condensers (air-cooled / evaporative) |
|---|---|
| Capacity range | 5 – 500+ kW per unit (multiple units for larger duties) |
| Refrigerants | NH₃ (R717) / CO₂ (R744) / HFC / Glycol / Brine |
| Coil construction | Copper tube / Aluminium fin (standard); Stainless steel tube/fin (optional) |
| Tube diameter | 9.52 / 12.7 / 15.88 / 19.05 / 25.4 mm |
| Fin spacing | 2 – 12 mm (per frost, cleanliness, and temperature application) |
| Casing material | Galvanized steel / Aluminium / Stainless steel (SS304 / SS316) |
| Fan type | Axial (standard) / Centrifugal (high static pressure) |
| Fan motor | AC shaded-pole / EC electronically commutated (variable-speed) |
| Defrost | Electric / Hot gas / Water (per application) |
| Operating temperature | −45°C to +15°C (air coolers); to +50°C ambient (condensers) |
| Certification | CE / ASME / PED (pressure-containing components) |
| Typical lead time | 8–14 weeks (custom-engineered) |
| Design life | 15–20 years (coils); 10–15 years (fans, normal operation) |
Design Details
How each subsystem is engineered
Expand any section below for the engineering approach behind each critical subsystem — with links to detailed Technology pages.
Air Cooler vs. Evaporator vs. Condenser
Air Cooler (Unit Cooler): The indoor unit that circulates cold air in a refrigerated space. Contains an evaporator coil, fans, and a casing. Mounted on the ceiling or wall of a cold room, freezer room, or processing area.
Evaporator (Process): A heat exchanger where liquid refrigerant evaporates, absorbing heat from the process fluid (air, water, glycol, or product).
Condenser: Rejects system heat to the ambient environment. Air-cooled condensers use ambient air; evaporative condensers use water evaporation for more efficient heat rejection.
Fin Spacing & Frost Management
Fin spacing is the critical design parameter for low-temperature air coolers:
- Low temperature (−25 to −40°C, high frost): 6–12 mm fin spacing
- Medium temperature (−5 to −25°C, moderate frost): 4–6 mm
- High temperature (+2 to +15°C, minimal frost): 2–4 mm
- Variable spacing: wider at air entry (heaviest frost), tighter toward exit
Material Selection for Environment
Standard: Copper tube, aluminium fin, galvanized casing. For general cold storage.
Food processing: SS304 casing, epoxy-coated aluminium fins. For washdown areas.
Coastal/marine: SS316 casing, epoxy-coated or copper fins. For salt-water environments.
Maximum hygiene: Full SS316 construction. For pharmaceutical or high-acid environments.
Fan Technology & Energy Efficiency
EC (Electronically Commutated) motors: 20–30% more efficient than AC. Speed controllable 10–100%. 2–3 year payback through energy savings.
AC shaded-pole motors: Simple, robust, lower capital cost. Fixed speed. Efficiency 50–60%. Budget-constrained applications.
Centrifugal fans: For applications requiring higher static pressure — ducted systems, long air throws.
Defrost System Design
For low-temperature air coolers, defrost is essential:
- Electric defrost: Heating elements in coil and drain pan. Simple, independent of refrigeration system.
- Hot gas defrost: Hot refrigerant gas directed through evaporator coil. Uses waste heat from refrigeration cycle. Lower operating cost.
- Water defrost: Warm water sprayed over coil. Fast — 8–15 minutes. Requires water infrastructure.
Proven in These Food Applications
Cold Storage Rooms
Maintains stable storage conditions for meat, seafood, fruit, vegetables, dairy and frozen foods.
Food Processing Areas
Controls temperatures in food-processing spaces while supporting hygiene and worker comfort.
Blast Freezers
Delivers the high airflow and refrigeration capacity required for rapid food freezing.
Outdoor Condensers
Rejects system heat reliably for cold stores, freezing lines and food-processing facilities.
Case Studies
Air Cooler / Evaporator / Condenser in Operation Worldwide
Real production lines with performance data — not renderings, not claims. Each installation documented with commissioning data.
Box-in-Box Cold Storage Deployment in North America
Published by: Square Technology Group – North America Sales Team Executive Summary Box-in-box cold storage
Spiral Freezing Solution for Steamed Dumplings
Client Location: ChicagoEquipment Supplier: Square Technology Group Co., Ltd. IQF: Ambient spiral cooler& spiral freezerRefrigeration
An Integrated Freeze-Drying Solution for Pet Food Processing
An Integrated Freeze-Drying Solution for Pet Food Processing Canature Processing Ltd. is a global leader
Dumpling Freezing Solution for ITACI SRL
Dumpling Freezing Solution for ITACI SRL ITACI SRL is a well-established food manufacturer specializing in
Frequently Asked Questions
Our units feature high-efficiency coils, variable-speed fans, and smart defrosting controls to minimize energy use without compromising performance. Tell us your demand energy consumption grade, in all way we will try our best to fulfill it.
Yes. Our evaporators are designed with optimized fin spacing and defrost systems to prevent frost buildup and maintain efficiency in challenging conditions.
We own CE, EAC, INF, CNAS, ISO, ASME, PED, U2, CSA, CRN certifications and 300+ patents, as well as 350+ engineers. Square vertically integrated production ensures quality control from raw materials.
Square can customize coil material, fin spacing, casing material, fan type, airflow direction, refrigerant circuit, defrost method, drainage, and control options for different cold-room, freezing, evaporating, or condensing applications.
Engineering Inquiry
Discuss Your Air Cooler / Evaporator / Condenser Project
Share your product type, target capacity, line layout, utilities, and site conditions. Our engineers will review your requirements and recommend a suitable Air Cooler / Evaporator / Condenser configuration.
