如何挑选靠谱的气调冷库厂家

(English version)

For fruit growers' cooperatives, cold-chain logistics parks and fresh-produce processors, building a controlled atmosphere (CA) storage facility is a multi-million-RMB capital decision. What determines whether that money is well spent is rarely the number on the quotation — it is whether your CA storage manufacturer can deliver three things consistently over ten years: an airtight envelope, accurate gas control, and rock-steady temperature.

In Shandong and neighbouring production areas, our team has delivered dozens of turnkey CA projects and been called in to fix quite a few failed ones. The recurring problems are always the same: an envelope that leaks so badly the oxygen level never drops below 8% even with the nitrogen generator running around the clock; gas distribution design so poor that five sampling points in one room differ by two percentage points; and — most seriously — missing pressure-relief valves and oxygen alarms that put maintenance crews at real risk.

Here is the evaluation checklist we have distilled from years of tender documents and commissioning reports.

1. Qualify before you price

A CA room is not merely a cold room. It combines refrigeration engineering, airtight construction and gas safety — three disciplines. Verify at least:

• Installation/contracting licences covering mechanical and refrigeration works, plus a valid safety production permit;
• Third-party certifications such as ISO 9001, with the scope explicitly covering refrigeration equipment installation;
• CA-specific references from the last three years. Insist on contracts or completion certificates for CA rooms, not just freezer rooms. Freezing capacity and controlled-atmosphere competence are different skill sets.

2. Airtightness is the lifeblood — ask for numbers

Per SBJ 16 (Design Code for Controlled Atmosphere Cold Stores), room tightness must be tested after sealing. GB/T 47156-2026, the new national standard for controlled-atmosphere apple storage, makes pre-loading tightness testing mandatory and references SBJ 16 for the method.

Ask your supplier to state in writing:

• Which envelope method is proposed — sealed sandwich panels with on-site sealant, a sprayed airtight layer, or a dedicated gas-tight membrane — and how it holds up over ten years;
• The test protocol and the achievable leak indicator (e.g. half-pressure-decay time), backed by actual test reports from previous projects;
• Details at weak points — pipe penetrations, doors, inspection windows — where roughly nine out of ten leaks actually occur.

3. Put gas accuracy into the technical agreement

CA technology is about precise control of O₂, CO₂ and ethylene. For apples, GB/T 47156-2026 specifies management accuracy of ±0.5 °C for temperature and ±3% for humidity, with cultivar-specific gas recipes — for Fuji-type apples it recommends -1 to -0.5 °C, 90–95% RH, O₂ at 2–3% and CO₂ at 0–1%, achieving 8–10 months of storage.

Lock these into the contract:

A competent CA storage manufacturer will name the brand and model of the nitrogen generator, CO₂ scrubber and ethylene removal unit, together with capacity and redundancy — not hide behind "European equipment".

4. Match refrigeration and controls to CA duty

• Load calculation: demand an hourly load profile based on your peak intake volume, incoming product temperature and loading frequency — not a rule-of-thumb watts-per-cubic-metre figure.
• Air coolers: CA rooms need low air velocity and small temperature difference to limit moisture loss. Fast-freezing evaporators with huge airflow are the wrong tool (see our article Air Cooler Selection Guide).
• Controls: remote monitoring, data logging, alarm thresholds, and open interfaces to your ERP or park management platform.

5. Five after-sales questions you must ask in writing

1. During warranty, if gas targets are met but preservation results fall short, how is responsibility assigned?
2. Spare parts inventory and replacement intervals for solenoid valves, sensor heaters and fan motors?
3. Response time commitment — a written 24 hours, or a vague "as soon as possible"? What is the service radius?
4. Operator training plus low-oxygen safety training (GB/T 47156-2026 requires at least two persons entering a CA room together, wearing oxygen respirators);
5. Free control software upgrades and reuse of capacity if you expand later.

6. Three hidden costs beyond the price tag

• Energy: ten years of electricity for refrigeration and nitrogen generation usually exceeds the equipment price difference. Ask for annual kWh per cubic metre.
• Shrinkage: the point of CA is to push losses from 8–12% under conventional cold storage down below 3%, and to capture the off-season price premium. Small specification gaps become hundreds of thousands of RMB every season.
• Rework and downtime: repairing the envelope means losing an entire intake season — the hardest cost to quantify.

Shandong BRT Refrigeration Equipment Co., Ltd. (山东博瑞特制冷设备有限公司), established in 2013, delivers cold-storage design, refrigeration equipment supply, installation and after-sales service, with 1,000+ completed projects, a 50-strong technical team and 24-hour service response. We provide free CA storage scheme design and budget estimates tailored to your product mix, capacity and turnover cycle.

Website: https://www.sdbrt.com　|　Tel / WhatsApp: +86 15898896999

Published by the Engineering Department of BRT Refrigeration. Parameters are cited from public standards including GB/T 47156-2026 and SBJ 16; final process values follow the project design documents.