🧊 NEMJO Vacuum Refrigerator

Refrigeration with Integrated Vacuum Chamber for Enhanced Food Preservation

📌 Problem Statement

In low-resource and rural areas, access to reliable, long-term food storage is limited due to:

High cost and complexity of conventional fridges.
Frequent power outages that disrupt cooling cycles, causing spoilage.
Lack of food-grade storage understanding for perishables like:

Fresh vegetables
Cooked food
Dairy products
Perishable agricultural products

Standard fridges suffer from poor sealing, moisture loss, and oxidation issues.

✅ NEMJO’s Unique Engineering Solution

Objective: To design an affordable refrigerator using vapour compression, enhanced with vacuum sealing for longer-lasting preservation in low-power settings.

🔬 Research and Development Approach

Used proven vapour compression cooling for reliability.
Studied vacuum’s effects on spoilage, oxidation, and moisture retention.
Designed an integrated low-power vacuum pump system.
Compared food shelf life in normal vs. vacuum-refrigerated environments.

🔧 Key Features & Technical Uniqueness

              1. ❄ Vapour Compression System:
              Uses standard compressor and refrigerant components.
Keeps temperature between 2–10°C.

          
              2. 🌀 Integrated Vacuum System:
              Maintains 300–700 mbar pressure for food longevity.
Slows microbial and oxidation rates.
Enhances thermal uniformity by removing air.

          
              3. 🛡 Extended Shelf Life:
              Preserves flavor, color, and nutrients.
Slows spoilage and prevents drying or mold.

          
              4. 💡 Power-Efficient Operation:
              Works with solar or inverters.
Vacuum pump cycles intermittently to save power.

          
              5. 🏗 Repairable & Locally Adaptable:
              Standard HVAC parts used.
Can be repaired and customized locally.

            

🌍 Social and Practical Impact

Preserves food 2–3x longer than normal fridges.
Perfect for small grocers, farmers, caterers, clinics, and off-grid homes.
Reduces daily spoilage and food waste.
Supports hygienic food storage in informal economies.
Encourages innovation in rural refrigeration and cold chains.

NEMJO Industrial Technologies Limited

We are an engineering company that builds simple supporting machines. We also offer services such as automation, CAD drawing, and simulation.

6 Engr Isah Street, up Ekhei girls’ road, Iyekhei, Auchi, Edo state

+234-7057451338, +234-8140018426, +234-8144844392

info@nemjotech.com