Views: 0 Author: Site Editor Publish Time: 2026-09-02 Origin: Site
These evaporators are low‑temperature air coolers for three typical freezing equipment:
Blast freezer: Batch static quick freezing for blocks, carton‑packed products
IQF tunnel freezer: Continuous individual quick freezing for loose granular food
Spiral freezer: Continuous freezing for seafood, meat portions, cheese, bakery goods
Evaporating temperature range: ‑38℃ ~ ‑48℃, heavy frosting risk, strict food‑hygiene requirements.
Item | Blast Freezer Evaporator | IQF Tunnel Evaporator | Spiral Freezer Evaporator |
|---|---|---|---|
Typical Usage | Block products, carton meat, whole fish, batch loading | Loose IQF products: shrimp, peas, diced meat | Portioned seafood, chicken pieces, shredded cheese, bakery |
Fin Spacing | 6‑8 mm Moderate humidity, static air circulation | 8‑12 mm / gradient pitch 10‑20 mm High moisture release, anti‑frost priority | 8‑12 mm Balance frosting & compact installation |
Tube Material | 304/316L SS for ammonia; copper for HFC | 304/316L SS for ammonia; copper for HFC | 304/316L SS for ammonia; copper for HFC |
Fin Material | Epoxy aluminum / SS304 | SS304 preferred for seafood; epoxy aluminum | Epoxy aluminum / SS304 for salt‑rich products |
Airflow Requirement | High static pressure, uniform circulating air | High‑velocity even airflow, avoid product agglomeration | Medium‑high velocity, compact fan layout |
Fan Type | AC / EC fans | EC fans (strongly recommended) | EC fans for speed modulation |
Defrost Mode | Hot‑gas / electric defrost | Hot‑gas defrost preferred | Hot‑gas / electric defrost |
Housing | Stainless steel, basic wash‑down | Full SS304, no dead corners, heavy wash‑down | Compact stainless steel casing, fit spiral internal space |
Severe frosting: Low operating temperature accelerates frost formation; improper fin pitch causes rapid airflow blockage.
Material brittleness: All metal components, welds and fan motors must adapt to ultra‑low temperature.
Refrigerant circuit design: Optimized pass layout for ammonia flooded / pump recirculation, CO₂ cascade or HFC systems.
Condensate drainage risk: Drain pans and piping must be heat‑traced to prevent ice‑blocking at ultra‑low temperature.
Food sanitation: Resist salt, fat and protein residue; suitable for high‑pressure washdown, comply with HACCP.
Supply complete evaporator units & bare coils for blast freezer, IQF tunnel and spiral freezer at ‑35 ~ ‑45℃:
Custom cooling capacity, fin spacing (including gradient variable pitch) according to product: meat, shrimp, cheese, vegetables.
304 / 316L stainless steel tube options for ammonia (R717), CO₂ and HFO/HFC refrigerants.
Ultra‑low‑temperature adapted fans, hot‑gas defrost design, heat‑traced drain pan.
Full hydrostatic & pneumatic pressure test. Food‑grade wash‑down construction.
Fit OEM freezer manufacturers and end‑user replacement projects, global export.
