Tunnel Freezer

Q: What throughput can we expect?

Typical ranges are 500–5000 kg/h for standard models. Custom units can achieve 10000+ kg/h depending on product type and model.

Q: How do we choose between mesh belt and spiral belt?

Mesh belt tunnels have a smaller footprint but require more floor space. Spiral tunnels stack vertically, saving floor space but require taller installations. Choice depends on facility layout.

Q: What products can be frozen in a tunnel freezer?

Most IQF products including seafood, meat, poultry, fruits, vegetables, bakery items, and prepared foods. Products should be relatively uniform in size for even freezing.

Q: What is the typical freezing time?

Residence time ranges from 5–60 minutes depending on product thickness and desired output temperature. Belt speed is adjustable to optimize freezing.

Q: How much floor space is required?

Small units: 6–10m length × 1.5–2m width. Large industrial units: 15–25m length × 3–5m width. Height varies from 2–6m depending on configuration.

Q: What power supply is required?

Standard units require 380V/3-phase/50Hz. Total consumption ranges from 50KW to 400KW depending on model and capacity.

Q: What maintenance is required?

Daily visual inspections and belt checks, weekly cleaning of evaporators, monthly condenser cleaning and sensor calibration, quarterly professional inspection and refrigeration service.

Q: Do you offer installation and commissioning?

Yes, complete installation, electrical connection, refrigeration setup, commissioning, operator training, and recipe development support are provided.

Product Introduction:

Industrial tunnel freezers for continuous high-capacity quick freezing of seafood, meat, poultry, fruits, and vegetables. Throughput 500–5000kg/h with -35°C air temperature. Energy-efficient design with PLC control for food processing plants.

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PRODUCT DETAILS

The Tunnel Freezer is an industrial-scale continuous freezing system designed for high-volume food processing operations requiring consistent, uninterrupted product throughput. Products travel through the tunnel on a conveyor belt while being exposed to high-velocity, low-temperature air, achieving rapid and uniform Individual Quick Freezing (IQF).

Core Technology:

· Continuous Flow Processing: Products enter one end, exit frozen from the other

· High-Velocity Air System: Multi-row finned evaporators with axial fans

· Adjustable Belt Speed: Match freezing time to product requirements

· Uniform Air Distribution: Counter-flow or cross-flow design ensures even freezing

· PLC Control: Touch screen operation with recipe management

Capacity Range:

· Small: 500–1000 kg/h

· Medium: 1000–3000 kg/h

· Large: 3000–10000+ kg/h

Product Quality:

· Individual Quick Freezing (IQF) — products freeze separately

· Minimal product adhesion and clumping

· Excellent shape and quality retention

· Low dehydration during freezing

Key Highlights

Highlight	Description
Continuous Operation	24/7 production capability with consistent throughput
High Throughput	500–10000+ kg/h depending on model and product
IQF Quality	Individual Quick Freezing prevents product clumping
Flexible Belt Options	Mesh belt, slat belt, or combined configurations
Variable Speed Control	Adjustable belt speed for different products (5–60 min residence)
Energy Recovery	Optional heat recovery system reduces operating costs
Stainless Steel Construction	Food-grade SUS304 throughout
Multi-Product Capability	Changeover recipes for different products
Compact Footprint	Efficient use of factory floor space

Technical Specifications

Parameter	Specification
Throughput	500 – 10000+ kg/h (product dependent)
Tunnel Temperature	-30°C to -40°C
Air Temperature	-35°C to -45°C
Initial Product Temp	+4°C to +20°C
Final Core Temp	-18°C or below
Belt Width	600mm – 2000mm (standard)
Belt Speed	0.5 – 5.0 m/min (adjustable)
Residence Time	5 – 60 minutes (adjustable)
Evaporator Rows	4 – 12 rows (by capacity)
Fan Power	5KW – 30KW per row
Refrigerant	R404A, R507, R449A (eco-friendly)
Power Supply	380V / 3-phase / 50Hz
Total Power	50KW – 400KW (by model)
Body Material	SUS304 stainless steel
Insulation	Polyurethane foam (150–200mm)
Control System	PLC touch screen, recipe storage
Defrost System	Automatic hot gas or electric defrost

Tunnel Types

Mesh Belt Tunnel Freezer

Model	Belt Width (mm)	Throughput (kg/h)	Power (KW)	Dimensions (L×W×H m)	Application
TF-M01	600	500–800	50	6×1.5×2.0	Small products, shrimp
TF-M02	800	800–1500	80	8×1.8×2.2	Mixed products
TF-M03	1000	1500–2500	120	10×2.0×2.5	Medium processing
TF-M04	1200	2500–4000	180	12×2.2×2.8	Large scale

Spiral Belt Tunnel Freezer

Model	Belt Width (mm)	Throughput (kg/h)	Power (KW)	Tower Dia. (m)	Application
TF-S01	600	1000–2000	100	3.0	Space-constrained
TF-S02	800	2000–3500	150	4.0	Medium capacity
TF-S03	1000	3500–5000	220	5.0	High volume
TF-S04	1200	5000–7000	300	6.0	Industrial scale

Hybrid Tunnel Freezer

Model	Configuration	Throughput (kg/h)	Power (KW)	Application
TF-H01	Mesh + Impingement	800–1500	100	Bakery, snacks
TF-H02	Mesh + Fluidized	1500–3000	180	Vegetables, berries

Belt Types & Applications

Belt Type	Features	Best For
Mesh Belt	Open structure, excellent airflow	Seafood, vegetables, small cuts
Slat Belt	Solid surface, even support	Patties, fish fillets, poultry
Fluent Belt	Partially open, gentle product handling	Delicate products, berries
Impingement Belt	High-velocity air jets	Thin products, bakery items
Combination	Multiple sections	Complex product requirements

Product Categories & Settings

Product	Belt Type	Belt Speed	Air Temp	Throughput
Shrimp	Mesh	Fast (5–10 min)	-40°C	High
White Fish	Mesh	Medium (10–20 min)	-38°C	Medium
Fish Fillets	Slat	Medium (10–15 min)	-35°C	Medium
Chicken Parts	Mesh	Medium (12–18 min)	-38°C	High
Hamburgers	Slat	Medium (8–12 min)	-35°C	High
Vegetables	Mesh	Medium (8–15 min)	-40°C	High
Berries	Fluent	Slow (15–25 min)	-30°C	Medium
Pastries	Impingement	Fast (5–8 min)	-35°C	High

Application Scenarios

Industry	Application
Seafood Processing	Shrimp, prawns, fish fillets, squid — continuous high-volume IQF
Meat Processing	Patties, meatballs, meat portions — consistent quality
Poultry Processing	Chicken nuggets, tenders, portions — high throughput
Fruit & Vegetable	IQF berries, corn, peas, green beans, broccoli
Bakery & Snacks	Frozen pastries, spring rolls, samosas
Ready Meals	Dumplings, wontons, dim sum, frozen entrees
Marine Processing	Onshore and vessel-based seafood processing
Food Distribution	Central processing for retail and food service

Operation Guide

Pre-Startup:

1. Pre-chill tunnel to operating temperature (30 minutes)

2. Verify belt alignment and tension

3. Check refrigerant levels and pressures

4. Test control system and safety interlocks

Production Operation:

1. Load products evenly on belt at infeed

2. Set belt speed for target residence time

3. Monitor product temperature at outfeed

4. Adjust speed based on product quality

5. Maintain consistent product flow rate

Changeover Procedure:

1. Clear tunnel of remaining products

2. Select saved recipe for new product

3. Adjust belt speed and air parameters

4. Verify quality at outfeed

FAQ

1. What is the difference between a tunnel freezer and a batch freezer?

Tunnel freezers operate continuously with products moving through on a conveyor belt, making them ideal for high-volume production. Batch freezers process products in discrete batches, better suited for lower volumes or varied product types.

2. What throughput can we expect?

Throughput depends on product type, initial temperature, and target freezing time. Typical ranges: 500–5000 kg/h for standard models, with custom units achieving 10000+ kg/h for very large operations.

3. How do we choose between mesh belt and spiral belt?

Mesh belt tunnels have a smaller footprint for equivalent capacity but require more floor space. Spiral tunnels stack the belt vertically, saving floor space but requiring taller installations. Choose based on your facility layout.

4. What products can be frozen in a tunnel freezer?

Tunnel freezers handle mostIQF products: seafood, meat, poultry, fruits, vegetables, bakery items, and prepared foods. Products should be relatively uniform in size for even freezing.

5. What is the typical freezing time?

Residence time in the tunnel ranges from 5–60 minutes depending on product thickness and desired output temperature. Belt speed is adjustable to optimize for different products.

6. How much floor space is required?

Small tunnel freezers: 6–10m length × 1.5–2m width. Large industrial units: 15–25m length × 3–5m width. Height varies from 2–6m depending on configuration.

7. What power supply is required?

Standard units require 380V/3-phase/50Hz power. Total consumption ranges from 50KW to 400KW depending on model and capacity. Dedicated electrical service recommended.

8. What maintenance is required?

· Daily: Visual inspection, belt tracking check

· Weekly: Clean evaporators, check belt tension

· Monthly: Clean condensers, calibrate sensors

· Quarterly: Professional inspection, refrigeration service

9. Can we freeze different products without cross-contamination?

Proper cleaning protocols between product changes prevent contamination. Some facilities dedicate tunnels to specific product categories (seafood vs. meat) for strict separation.

10. Do you offer installation and commissioning?

Yes, we provide complete installation, electrical connection, refrigeration system setup, commissioning, operator training, and recipe development support.

11. What is the typical lead time?

Standard models: 30–45 days. Custom configurations: 45–60 days. Large-scale projects may require longer lead times for engineering and fabrication.

12. Are eco-friendly refrigerant options available?

Yes, we offer models using R449A, R290 (propane), or CO2 transcritical systems for facilities with environmental requirements.

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Tunnel Freezer

Tunnel Freezer

Product Introduction:

PRODUCT DETAILS

Key Highlights

Technical Specifications

Tunnel Types

Mesh Belt Tunnel Freezer

Spiral Belt Tunnel Freezer

Hybrid Tunnel Freezer

Belt Types & Applications

Product Categories & Settings

Application Scenarios

Operation Guide

FAQ

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