Views: 0 Author: Site Editor Publish Time: 2026-06-05 Origin: Site
Core Storage Parameters for Avocado (Design Basis)
Avocado Stage | Storage Temp | RH | Storage Life |
|---|---|---|---|
Mature-green unripe (Hass main bulk storage) | 7～10°C | 90%～95% RH | 25～30 days |
Pre-ripe ready-to-sell | 5～7°C | 90%～93% RH | 12～18 days |
Fully ripe finished fruit | 2～4°C | 88%～92% RH | 5～8 days |
Product Structure & Key Components (High-humidity type vs standard unit cooler)
Fin & Tube Evaporator Coil (304 stainless steel / hydrophilic aluminum fin)
Small ΔT between refrigerant & circulating air (3～5K only, vs standard cooler 8~12K), minimizing air dehumidification on coil surface, core to keep high room humidity without extra humidifier.
Low-speed large-flow axial fans (IP54 motor)
Low outlet wind speed ≤1.8m/s, avoid surface moisture evaporation of avocado skin; uniform air circulation inside cold room, no local dry spots.
Auto hot-gas defrost system
Timed mild defrost, short defrost cycle to avoid big fluctuation of room T & RH; reduce moisture loss during defrosting.
Optional circulating water spray humidification module (for ultra-high RH 93~95%)
Purified soft water spray onto coil surface to replenish air moisture when needed, widely used for long-term bulk avocado warehouse.
Insulated drain pan + anti-mold drain pipe
Prevent condensed water splashing onto stacked avocados to avoid mold rot.
Working Principle
Refrigerant evaporates inside copper tubes to absorb air heat; small coil-air temperature difference restricts water vapor condensation on fins, so most moisture remains in circulating air to maintain 90%+ RH inside cold room.
Fans circulate cold high-humidity air evenly around avocado stacks, lower ambient temperature to slow fruit respiration & ethylene generation, cut fruit weight loss below 3% for whole storage period (normal standard cooler dry loss ≥7%).
Auto periodic hot gas defrost removes thin frost on coil without sharp room temp drop; auxiliary spray system tops up humidity if ambient RH falls below target setpoint.
Main Advantages for Avocado Storage
✅ Low fruit weight loss, prevent avocado peel shrinkage & dark shrivel
✅ Stable temp & RH avoids chilling injury and uneven post-storage ripening
✅ No independent industrial humidifier required, save equipment & running cost
✅ Slow down respiration & ethylene release, extend avocado shelf life by 30%+
Application Scenarios
Bulk pre-cooling & long-term cold storage warehouse for imported/local Hass avocado
Packhouse finished fruit short-term holding cold room before supermarket delivery
Container cold storage for sea/land avocado transportation
