Blast Freezer – Rapid Freezing Solutions for Food & Cold Chain

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Discover advanced quick-freezing solutions with Hengliang Cooling blast freezer rooms, engineered to rapidly freeze large quantities of food while preserving product quality and structure.

Designed for demanding freezing applications, our blast freezer rooms support temperature ranges from –30°C to –40°C, with ultra-low options reaching –60°C. Equipped with high-performance refrigeration systems, including vertical air coolers and blast chilling units, Hengliang Cooling blast freezer rooms can be customized to meet different production capacities and freezing requirements.

From food processing to cold chain logistics, we deliver reliable, high-efficiency blast freezing solutions tailored to your operation.

Get a Custom Blast Freezer Solution

Share your product type, freezing capacity, and production workflow.
Our engineers will design a blast freezer system optimized for rapid freezing.

1. What Is a Blast Freezer?

A blast freezer is a specialized freezing system designed to rapidly reduce product temperature from ambient or chilled conditions to −18°C or lower in a very short time.

Unlike freezer rooms, which are primarily used for storage, blast freezers focus on:

• Fast heat removal

• High air velocity

• Precise freezing curves

The objective is to minimize ice crystal formation, thereby preserving:

• Product texture

• Nutritional value

• Appearance

• Shelf life

2. Why Blast Freezing Matters

Slow freezing allows large ice crystals to form inside the product, which can damage cell structure.

Blast freezing:

• Freezes products quickly and uniformly

• Reduces dehydration and drip loss

• Improves food safety

• Ensures consistent product quality

For many food processors, blast freezing is not optional, but a critical production step.

3. Blast Freezer vs Freezer Room

Typical Temperature & Freezing Performance

Blast freezers are designed to operate at:

• Air temperature: −30°C to −40°C

• Product core temperature: ≤ −18°C within hours

Performance depends on:

• Product type and size

• Initial temperature

• Loading pattern

• Airflow design

Engineering design ensures repeatable and controllable freezing results.

Key Components of a Blast Freezer System

High-Capacity Refrigeration System

Blast freezers require significantly higher cooling capacity than storage freezers.

Key features include:

• Industrial compressors

• Oversized evaporators

• Low-temperature refrigerants

• Redundant safety controls

High-Velocity Air Circulation Design

Powerful fans create uniform, high-speed airflow across all products.

This ensures:

• Even freezing

• No hot spots

• Predictable freezing time

Airflow design is one of the most critical engineering aspects.

Insulated Enclosure & Panels

Blast freezers use:

• Thick insulated panels

• Airtight construction

• Hygienic interior surfaces

This prevents heat gain and condensation during intensive freezing cycles.

Control System & Freezing Programs

Advanced controllers allow:

• Programmable freezing cycles

• Core temperature monitoring

• Alarm & data logging

• Integration with production lines

Loading Systems

Depending on application:

• Trolleys

• Racks

• Trays

• Pallets

• Conveyor-fed systems

Design is based on throughput and workflow.

Types of Blast Freezers

Batch Blast Freezer

• Products loaded in batches

• Ideal for flexible production

• Common in catering and food factories

Tunnel Blast Freezer

• Continuous operation

• High throughput

• Integrated into processing lines

Spiral Blast Freezer

• Compact footprint

• Continuous freezing

• Suitable for large-scale industrial production

Applications of Blast Freezers

Food Processing Industry

Used for:

• Meat and poultry

• Seafood

• Bakery products

• Ready meals

• Fruits and vegetables

Ensures product quality and safety.

Central Kitchens & Catering

Blast freezers allow:

• Production in advance

• Safe storage before distribution

• Compliance with food safety standards

Cold Chain & Export Processing

Rapid freezing is essential for:

• Export-grade frozen products

• Long-distance cold chain logistics

Customization Options

Blast freezers can be customized by:

• Freezing capacity (kg/batch or kg/hour)

• Product dimensions

• Required freezing time

• Layout & loading method

• Refrigeration system type

• Automation level

Customization ensures optimal performance and cost efficiency.

Key Benefits of Blast Freezers

• Rapid and uniform freezing

• Superior product quality

• Reduced weight loss

• Improved food safety

• Higher production efficiency

• Compliance with international standards

Installation & Engineering Support

Blast freezer systems are:

• Engineered per project

• Factory pre-assembled where possible

• Installed and commissioned on-site

Professional engineering support ensures reliable long-term operation.

Frequently Asked Questions (FAQ)

Q1: Can a blast freezer be used as a storage freezer?
No. Blast freezers are designed for freezing, not long-term storage.

Q2: How long does blast freezing take?
Depending on product and size, typically from 1 to several hours.

Q3: Do I still need a freezer room after blast freezing?
Yes. Frozen products are usually transferred to a freezer room for storage.

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Get a Custom Blast Freezer Solution

Tell us your product type, freezing capacity, and production workflow.
Our engineers will design a blast freezer system optimized for your process.