Container Cold Room for Root Vegetables

Engineered specifically for post-harvest preservation, the Container Cold Room for Root Vegetables provides precise climate control for high-respiration produce including potatoes, carrots, onions, ginger, and sweet potatoes. Standardized in 20ft, 40ft, and custom modular dimensions, the system maintains ultra-wide operating temperatures from -25°C to +25°C and relative humidity levels between 85% and 90%. Rather than relying on generic off-the-shelf configurations, each refrigeration system and structural layout is thermodynamically engineered around crop-specific respiration rates, incoming heat load, target transit duration, and ambient environmental conditions.

Different root crops require strict microclimates to suppress sprouting, prevent moisture loss, and mitigate bacterial decay. We tailor internal airflow, insulation performance, and structural components to deliver maximum energy efficiency and product quality retention throughout transit and storage.

Wide Temperature Operating Range: -25°C to +25°C

The Container Cold Room for Root Vegetables features a broad temperature band from -25°C to +25°C, enabling stable refrigeration, chill preservation, or controlled ambient conditioning. Storage requirements vary significantly across species: potatoes require anti-sprouting temperature control (~4°C to 8°C), whereas ginger and sweet potatoes demand warmer chilling-threshold management (~12°C to 14°C). For long-haul export logistics, equipment operating parameters are calculated using ambient climate data, payload density, and transit duration.

For mixed-crop loads, multi-zone thermal partitions can be integrated with independent temperature setpoints, eliminating cross-temperature contamination and thermal interference between commodities.

Active Humidity & Moisture Control: 85% to 90% RH

Relative humidity is actively regulated between 85% and 90% using integrated humidification, dehumidification, and micro-ventilation modules. Low-humidity environments cause rapid dehydration, skin wrinkling, and commercial weight loss in root tubers. Conversely, excessive humidity without adequate air circulation causes localized condensation, promoting mould growth and rot. Our systems balance vapor pressure differentials, cooling capacity, and air exchange rates to match crop-specific respiration profiles.

20ft, 40ft, and Custom Modular Specifications

We manufacture ISO-compliant 20ft and 40ft reefer formats along with custom dimensioned cold enclosures to match site space constraints and handling workflows.

Internal configurations are designed around specific packaging methodologies. Bagged products like onions and garlic feature elevated floor grating and optimized static pressure chambers to ensure air penetration. Palletized workflows incorporate internal guide rails and custom rack clearance tailored to pallet dimensions and stacking limits.

High-Density 100mm PU Insulation & Hermetic Sealing

The Container Cold Room for Root Vegetables utilizes 100mm foamed-in-place high-density polyurethane (PU) insulation panels achieving thermal conductivity as low as ≤0.024 W/(m·K). Combined with heavy-duty dual-gasket door seals, the structure minimizes thermal bridging and refrigeration duty cycles.

For high-ambient operating environments or long-term stationary storage, insulation performance and compressor cooling curves are matched as a unified system to prevent equipment overload and excessive power consumption.

Industrial PLC Automation & Defrost Management

Each unit is equipped with an industrial-grade PLC microcomputer control system managing temperature regulation, humidity balancing, automatic electric or hot-gas defrost cycles, and operational self-diagnostics. By automating routines and system protection, the control suite eliminates manual intervention and maintains continuous thermal stability.

IoT Telematics & Remote Management

An optional IoT telematics platform enables real-time network connectivity. Logistics managers can monitor live operational status, analyze historical temperature curves, and receive immediate fault alerts via mobile app or web console. Remote diagnostics reduce manual site visits, making it ideal for unmanned remote farms, port staging centers, and cross-border logistics fleets.

Customizable Internal Structuring, Shading, and Ventilation

Root crops demand tailored mechanical structures within the storage bay. Configurable features include:

Multi-zone thermal partition barriers

Controlled micro-ventilation fresh air exchangers

Integrated active humidification / dehumidification loops

Light-proof interior shielding (prevents potato solanine synthesis/greening)

Heavy-duty anti-slip aluminum floor grating

Multi-layer pallet support racks

Customized air duct delivery networks

Thermodynamic System Sizing Based on Heat Load

Compressor capacity is dynamically engineered rather than fixed to container dimensions. System design factors in total cargo volume, incoming field heat, target pulldown time, ambient climate conditions, and transit duration. High-field-heat produce loaded directly after harvest requires larger cooling capacity to achieve rapid pulldown, whereas pre-cooled goods require stable, low-duty holding refrigeration.

Storage & Loading Protocols for Root Crops

Freshly harvested tubers carrying high field heat require clear cooling specifications during initial system selection to determine if dedicated precooling capacity is needed. During loading, cargo stacking must maintain clear air intake and discharge pathways to prevent airflow short-circuiting. Proper loading density guarantees uniform temperature throughout the cargo envelope during long-haul transport.

Comparative Analysis: Specialized Containerized Cold Storage Solutions

Solution Selection Guide

Mixed Tuber Loads: For simultaneous storage of potatoes, onions, ginger, and sweet potatoes with differing thermal points → Select Container Cold Room for Root Vegetables configured with multi-temperature zone dividers.

High-Moisture Leafy Crops: For spinach, lettuce, or brassicas prone to wilting → Select Container Cold Room for Green Vegetables optimized for high airflow and 95% RH retention.

Deciduous & Temperate Fruit: For apples, pears, or stone fruits → Select Container Cold Room for Temperate Fruits built for stable chilling and gas management.

Chilling-Sensitive Subtropical Produce: For bananas, mangoes, or papayas → Select Container Cold Room for Tropical Fruits designed specifically to prevent low-temperature physiological injury.

R&D Engineering and OEM Manufacturing Strengths

We maintain complete in-house design and fabrication capabilities spanning refrigeration units, electrical controllers, and insulated container shells. Our technical team comprises 4 senior R&D engineers and 2 HVAC/R systems engineers with over 10 years of industrial refrigeration experience, specializing in custom thermodynamic modeling, commissioning, and extreme ambient operation.

Supported by 2 invention patents, 16 utility model patents, and 13 software copyrights, we develop proprietary PLC control software and mechanical hardware tailored to client specifications.

Jinan and Qingdao Production Infrastructure

Operating across two manufacturing facilities in Jinan and Qingdao totaling 12,000 m² (plus 1,000 m² R&D center), our facilities house two specialized assembly lines. We maintain a monthly production capacity of 100 units, yielding an annual capacity of 1,000 refrigeration units and 300 complete reefer container systems. Integrated performance testing bays validate every unit prior to dispatch.

Factory Quality Assurance & Performance Testing

Prior to leaving the factory, every Container Cold Room for Root Vegetables undergoes stringent quality verification:

Raw material and component inspection

Refrigerant loop high-pressure leak detection

Hydrostatic pressure testing

Deep vacuum dehydration verification

Electrical safety and insulation grounding checks

Thermodynamic cooling performance evaluation

Multi-point sensor calibration

Full-system load run-in testing

Pre-dispatch Quality Control (QC) sign-off

All container cold room units are fully certified under European Union CE standards.

Application Scenarios

On-Farm Origin Storage: Provides scalable, mobile cooling capacity directly at harvest sites without permanent civil construction.

Port & Logistics Transfer Hubs: Functions as temporary or buffer cold storage to manage seasonal peak volume at shipping terminals and distribution hubs.

Cross-Border Intermodal Transit: Offers reliable temperature and humidity holding across long-distance sea and land routes.

Urban Distribution & Grocery Logistics: Serves as forward cold storage for regional fulfillment centers and fresh produce wholesalers.

Certifications

Turnkey Project Services & Global Technical Support

We deliver end-to-end service covering site consultation, thermal calculation, equipment fabrication, commissioning, and lifetime maintenance support. Each system is supplied with technical documentation, operation manuals, and wiring schematics. In case of operational anomalies, our technical center provides 24/7 remote diagnostic support, supported by localized authorized service partners. Equipment includes a 12-month comprehensive warranty with a guaranteed 48-hour service response SLA.

Frequently Asked Questions

1. Which produce varieties are best suited for the Container Cold Room for Root Vegetables?

It is engineered for root, tuber, and bulb crops including potatoes, carrots, onions, garlic, ginger, and sweet potatoes across storage, intermodal shipping, and hub staging applications.

2. What are the precision control ranges for temperature and humidity?

The system maintains temperatures from -25°C to +25°C and relative humidity from 85% to 90% RH, fully adjustable based on crop respiration and storage targets.

3. Can the cold room accommodate commodities with conflicting temperature needs simultaneously?

Yes. We engineer multi-temperature zone partitions with dedicated air handling loops to store distinct products (e.g., potatoes at 4°C and ginger at 12°C) within a single container body.

4. What footprint options are available?

We supply standard 20ft, 40ft High Cube, and custom modular dimensions. Refrigeration capacity and interior racking are engineered to match your target payload weight and loading methods.

5. How does the remote IoT monitoring system work?

The optional IoT telematics package streams real-time temperature, humidity, compressor status, and defrost logs to a secure app or web portal, providing instant SMS/Email alerts for parameter deviations.

6. What parameters are required to receive a customized technical proposal?

Please provide: target crop varieties, maximum loading weight, incoming core product temperature, target storage temperature, required cooling time, ambient climate conditions, and intended transportation methods.