Plate Freezer
An ammonia plate freezer is an industrial freezing system that uses ammonia (NH₃) as the refrigerant and metal plates to freeze products rapidly by direct contact, commonly used for block freezing of packaged goods like meat, fish, and dairy. A plate freezer is a type of industrial freezer that uses flat, metal plates cooled to very low temperatures to freeze food products quickly. The plates come into direct contact with the product, making the freezing process efficient and uniform.
Key Features:
1. Ammonia Refrigerant
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Uses natural ammonia with zero ozone depletion potential (ODP) and zero global warming potential (GWP)
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Offers high thermal efficiency and low operating costs
2. Direct Contact Freezing
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Products are placed between refrigerated metal plates cooled by ammonia circulating inside
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Allows fast and uniform heat transfer from product to refrigerant
3. Rapid Freezing
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Can freeze large blocks or cartons quickly and evenly
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Helps preserve product texture, color, and quality by minimizing ice crystal size
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Can freeze products to -18°C or lower in a few hours.
4. Energy Efficient
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Direct contact reduces energy loss compared to air-based freezing systems
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Requires less refrigeration capacity due to efficient heat transfer
5. Compact and Space-Saving Design
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Plate freezers occupy less floor space than tunnel or spiral freezers
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Available in horizontal or vertical configurations to fit plant layouts
6. Batch Freezing Operation
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Products are loaded manually or by machinery in trays, cartons, or flexible packaging
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Ideal for block freezing meat, fish fillets, dairy blocks, and fruit pulp
7. Hygienic and Durable Construction
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Stainless steel plates and frame to prevent corrosion and comply with food safety standards
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Easy to clean and maintain
8. Scalable Capacity
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Available in various sizes and plate numbers to meet small, medium, or large production needs
9. Safety Features
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Includes ammonia leak detectors, emergency ventilation, and shutdown systems for safe operation
