Views: 0 Author: Site Editor Publish Time: 2026-06-12 Origin: Site
Food processing plants involve bakery, meat freezing, dairy cooling, beverage production and quick-freezing workshops, which require hygienic, anti-corrosion and stable air cooling equipment. Stainless steel tube aluminum fin air coolers become the mainstream evaporator choice for food workshop refrigeration systems, widely matched with CO₂ transcritical refrigeration units, ammonia or fluorine refrigerant cold rooms. Different from ordinary copper tube coolers, stainless steel tube core solves corrosion risk from food cleaning water, salt fog, acidic raw material vapor inside food workshops. This article introduces its structure, core advantages, working features and applicable food processing scenarios to help buyers select suitable workshop cooling equipment.
Core Construction Design for Food Grade Working Condition
The whole cooler adopts tube-fin forced-air structure, composed of SS heat exchange coil, corrugated aluminum fin, axial fan, galvanized/SS cabinet and drainage pan.
Heat exchange tube: Mainly 304 / 316L seamless stainless steel tube. 316L is preferred for seafood pickling, meat marinating workshops with salt mist and weak acid steam. Tube wall thickness is customized per working pressure, fit for DX direct expansion CO₂ system or flooded evaporator refrigeration circuit. Mechanical expansion joint fixes tube and fin tightly to avoid loose gap under frequent temperature fluctuation.
Aluminum fin: Hydrophilic coated aluminum fin is standard configuration for food factory. Hydrophilic film accelerates condensed water dripping, prevents fin surface water film adhesion, avoids mold and bacteria breeding on fins in high humidity food workshop environment; corrugated fin improves air turbulence to raise heat exchange efficiency.
Cabinet & drain tray: Outer casing uses hot-dip galvanized steel or SUS304 stainless steel. Full stainless steel cabinet is popular in wet food production area. Sloped stainless steel drain pan with drain nozzle ensures complete condensate drainage, no ponding inside unit to prevent microbial growth complying with food sanitation standard.
Fan assembly: IP54/IP55 waterproof axial fans, moisture-proof motor adapts high humidity workshop, optional variable frequency fan to adjust air volume according to workshop load change.
Key Advantages for Food Processing Workshop Use
(1) Outstanding anti-corrosion performance to fit complex workshop atmosphere
Food workshops always generate salt steam (seafood processing), lactic acid, acetic acid (pickle, dairy, fruit processing), frequent high-pressure water cleaning for floor and equipment. Common copper tube is prone to pitting corrosion after long-term contact with acid & salt vapor, leading to refrigerant leakage and early scrapping. Stainless steel tube effectively resists corrosion from food volatile medium, extends cooler service life from 2–3 years (copper type) to 6–10 years, greatly cutting factory later replacement and maintenance cost.
(2) High sanitation level conforms to food production regulation
Hydrophilic aluminum fin + SS tube structure is easy for regular sanitation cleaning: workshop staff can wash coil surface with low-pressure clean water without worrying about tube corrosion. No residual ponding inside unit reduces cross-contamination risk of food raw material caused by mold and mildew inside cooler, matching HACCP and international food hygiene requirements.
(3) Wide refrigerant compatibility
Supports multiple refrigerants including CO₂, R404A, R507, ammonia, widely compatible with DX direct expansion and flooded evaporator refrigeration loop, perfect match with previous mentioned CO₂ DX/flooded refrigeration system for cold storage workshop.
(4) Stable cooling under high humidity & variable load
Variable frequency fan design adjusts airflow automatically when workshop production load changes (peak production / off-production shutdown). Even under relative humidity 85%~95% typical food workshop environment, unit keeps stable evaporation temperature, guarantees constant indoor temperature of quick-freezing room, cooling workshop and finished product cold storage.
Main Application Segments in Food Processing Industry
Meat & poultry processing: Pre-cooling workshop, carcass quick cooling room, finished meat cold storage (0℃~4℃ storage, -18℃ frozen warehouse). 316L SS tube cooler is selected for marinating & curing workshop with heavy salt mist.
Seafood processing: Fish, shrimp quick-freezing workshop, seafood sorting pre-cooling room; high salt environment must adopt full 316L coil + SS cabinet.
Dairy & beverage factory: Milk raw material pre-cooling, yogurt fermentation constant temperature workshop, fruit juice finished product cold storage; hydrophilic fin avoids condensed water dripping onto production line.
Bakery & pastry workshop: Raw material cold storage, finished bread low-temperature fresh-keeping room, control ambient temp to slow food deterioration.
Fruit & vegetable processing: Pre-cooling after picking, cleaning workshop constant temperature, fresh-cut vegetable cold preservation warehouse.
Customization Options for Different Food Workshops
Refrigerant side design pressure: Custom 2.5MPa for conventional fluorine system, up to 16MPa high-pressure design for transcritical CO₂ refrigeration project;
Material upgrade: Full SUS304 or SUS316 whole unit for heavy corrosive seafood/pickling plant; standard galvanized shell + 304SS tube + hydrophilic Al fin for ordinary bakery and fruit workshop;
Anti-freezing & defrosting mode: Electric defrost / hot gas defrost optional per customer’s refrigeration unit configuration, hot gas defrost widely used in large continuous production food factory to reduce downtime caused by manual defrost.
