【案例】80%冷却时间缩短+失水率降至2%以下 —— CVF食品真空速冷机在预制菜与卤制品领域的应用
> **核心结论:** 食品真空速冷机通过真空蒸发吸热原理,将75~90℃热食品在10~20分钟内冷却至0~8℃,相比传统风冷缩短冷却时间80%,失水率从5%~8%降至0.8%~2.8%。本文基于上海中央厨房、煌上煌集团、北京烘焙工厂三个已交付项目,展示真空速冷技术在预制菜、卤制品、烘焙食品中的实测数据。
【案例】80%冷却时间缩短+失水率降至2%以下 —— CVF食品真空速冷机在预制菜与卤制品领域的应用
核心结论: 食品真空速冷机通过真空蒸发吸热原理,将75
90℃热食品在1020分钟内冷却至0~8℃,相比传统风冷缩短冷却时间80%,失水率从5%~8%降至0.8%~2.8%。本文基于上海中央厨房、煌上煌集团、北京烘焙工厂三个已交付项目,展示真空速冷技术在预制菜、卤制品、烘焙食品中的实测数据。
一、行业背景:热食品冷却的工程痛点
熟食冷却长期面临三个矛盾:冷却速度——食品需在2小时内通过60℃→10℃危险温度区,传统风冷难以达标;失水率——风冷高达5%~8%,导致产品干瘪、出成率下降;冷凝水——自然冷却表面凝结水珠,包装后易霉变胀袋。
真空速冷技术利用水的沸点随压力降低而下降的原理,在真空腔体内使食品表层水分迅速蒸发带走潜热,成为上述问题的工程化解决方案。
二、技术方案:CVF食品真空速冷机原理与配置
食品真空速冷机是一种利用真空蒸发冷却(Vacuum Evaporative Cooling)原理的工业制冷设备。核心流程:热食品(75~90℃)放入SUS304不锈钢真空箱体→真空泵将腔体压力降至0.5~2.0 kPa(绝对压力)→水分蒸发带走热量→捕水器(冷井)(即制冷系统蒸发器/吸热端,区别于冷凝器/排热端)凝结水蒸气维持真空→达温后破空取料。
关键技术参数对比
| 参数项 | 传统风冷 | CVF真空速冷 |
|---|---|---|
| 冷却时间(200kg) | 120~150 min | 10~20 min |
| 失水率(预制菜) | 5%~8% | 1.8%~2.8% |
| 失水率(烘焙) | 3%~5% | 0.8%~1.8% |
| 表面冷凝水 | 严重 | 无 |
| 危险温度区时间 | >90 min | <20 min |
设备系列:采用Bitzer半封闭活塞压缩机/谷轮涡旋压缩机+管壳式捕水器,型号数字对应批次处理量——CVF-100(100 kg/批)、CVF-300(300 kg/批)、CVF-500(500 kg/批)。所有食品接触面均为SUS304不锈钢。
三、案例数据:三个已交付项目实测结果
案例1:上海某中央厨房 —— 预制菜(2025年交付)
| 项目 | 数据 |
|---|---|
| 设备 | CVF-500(双捕水器+冷水预冷模块) |
| 食品 | 红烧肉、宫保鸡丁、鱼香肉丝 |
| 批次重量 | 200 kg/批 |
| 入料→目标 | 75 |
| 冷却时间 | 30~35 min(风冷150 min) |
| 失水率 | 2.0%~2.8%(风冷5%~8%) |
| 压缩机 | Bitzer 6DC-8.2-50S |
| 捕水器面积 | 2×18 m² 管壳式 |
工程价值: 日产量从4批次提升至12批次以上。
案例2:长沙某食品公司—— 卤制品(2025年12月交付)
| 项目 | 数据 |
|---|---|
| 设备 | CVF-300(双捕水器) |
| 食品 | 卤鸭脖、卤鸭翅、卤藕片 |
| 批次重量 | 100 kg/批 |
| 入料→目标 | 85 |
| 冷却时间 | 35~40 min |
| 失水率 | 1.8%~2.5% |
| 压缩机 | Bitzer 4DC-6.2-30S |
| 捕水器面积 | 2×12 m² 管壳式 |
工程价值: 表皮完整、口感与自然冷却无异,产能提升300%。
案例3:北京某烘焙连锁工厂(2025年10月交付)
| 项目 | 数据 |
|---|---|
| 设备 | CVF-100 + CVF-300 双线 |
| 食品 | 吐司面包、戚风蛋糕 |
| 批次重量 | 50~100 kg/批 |
| 入料→目标 | 80 |
| 冷却时间 | 10~15 min |
| 失水率(面包) | 0.8%~1.8% |
| 月产量 | 80吨 → 200吨 |
工程价值: 面包无塌陷,月产量增幅150%。
四、客户反馈
上海中央厨房生产负责人: “传统风冷30分钟缩短至真空速冷8分钟(单盘),失水率降低50%,包装无冷凝水,彻底解决了胀袋痛点。”
长沙某食品工厂技术总工: “速冷后卤制品表皮完整、口感与自然冷却无异。产能提升300%,是卤制品冷却工艺的工程升级。”
北京烘焙工厂厂长: “面包表皮完整无塌陷,月产量从80吨提升至200吨。真空速冷解决了烘焙行业冷却环节的产能瓶颈。”
五、总结
- 冷却效率质变: 120
150分钟→3050分钟,缩短幅度75%~80%,产线节拍可匹配包装节拍。 - 失水率可控: 从5%~8%降至0.8%
2.8%,每百公斤多出36公斤成品。 - 食品安全合规: 危险温度区通过时间从>90分钟压缩至<20分钟。
- 包装品质提升: 无冷凝水残留,消除霉变胀袋隐患。
日处理量超1吨的热食加工企业,真空速冷技术已从"可选升级"变为产线效率瓶颈的工程必经之路。
常见问题(FAQ)
Q1: 食品真空速冷机与果蔬真空预冷机有什么区别?
A: 入料温度不同——食品速冷机处理**7590℃热食品,果蔬预冷机处理2530℃**常温果蔬。真空泵、捕水器、制冷负荷设计本质不同,不可混用。
Q2: 真空速冷会影响食品口感吗? A: 不会。煌上煌实测失水率**1.8%~2.5%**时,卤制品表皮和口感与自然冷却无异。烘焙失水率更低(0.8%~1.8%),面包无塌陷。
Q3: 型号数字代表什么? A: 数字=批次处理量。CVF-500=500 kg/批,CVF-300=300 kg/批,CVF-100=100 kg/批。实际处理量需根据食品种类和入料温度核算。
Q4: 设备占地面积多大? A: CVF-300约8~10 m²(含真空泵组),CVF-500约12~15 m²,可接入现有产线。
Q5: 投资回收周期多长?
A: 产能提升200%300%+失水率降低36 kg/百kg,典型回收期8~14个月。
作者: 源鲜机械应用技术部 审校: 陈工(高级制冷工程师) 发布日期: 2026年6月25日
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【Case Study】80% Cooling Time Reduction + Weight Loss Below 2% — Application of CVF Food Vacuum Cooler in Prepared Foods and Braised Products Industry
Key Takeaway: The CVF food vacuum cooler uses vacuum evaporative cooling to bring hot food (75–90°C) to 0–8°C in 30–50 min — reducing cooling time by 80% and weight loss from 5–8% to 0.8–2.8%. Data from three delivered projects is presented below.
1. Background: The Cooling Challenge
Hot food (75–90°C) must pass the danger zone (60°C → 10°C) within 2 hours for food safety; air cooling takes >90 min and causes 5–8% weight loss plus surface condensation. Vacuum cooling technology (water evaporation under reduced pressure) solves all three problems simultaneously.
2. Technical Solution: CVF Vacuum Cooler
A food vacuum cooler is an industrial refrigeration device using vacuum evaporative cooling. Process: hot food enters SUS304 stainless steel chamber → pressure drops to 0.5–2.0 kPa → surface moisture evaporates, removing latent heat → water catcher (cold trap) (evaporator/heat absorption side, not condenser) condenses vapor to maintain vacuum → chamber vents when target temp is reached.
Performance Comparison
| Parameter | Air Cooling | CVF Vacuum | Improvement |
|---|---|---|---|
| Cooling (200 kg) | 120–150 min | 30–40 min | 75–80% ↓ |
| Weight loss (prepared) | 5–8% | 1.8–2.8% | 50–65% ↓ |
| Weight loss (bakery) | 3–5% | 0.8–1.8% | 60–70% ↓ |
| Condensation | Severe | None | Risk eliminated |
| Danger zone transit | >90 min | <20 min | Safety improved |
Models: CVF-100 (100 kg/batch), CVF-300 (300 kg/batch), CVF-500 (500 kg/batch), all with Bitzer compressors + SUS304 food-contact surfaces.
3. Case Data
Case 1: Shanghai Central Kitchen — Prepared Foods (2025)
| Parameter | Data |
|---|---|
| Model | CVF-500 (dual catcher) |
| Products | Braised pork, kung pao chicken |
| Batch | 200 kg |
| Temp range | 75–85°C → 4–8°C |
| Cooling time | 30–35 min (air: 150 min) |
| Weight loss | 2.0–2.8% (air: 5–8%) |
| Compressor | Bitzer 6DC-8.2-50S |
Impact: Daily throughput from 4 to 12+ batches.
Case 2: Huangshanghuang Group — Braised Products (Dec 2025)
| Parameter | Data |
|---|---|
| Model | CVF-300 |
| Batch | 100 kg |
| Temp range | 85–90°C → 0–4°C |
| Cooling time | 35–40 min |
| Weight loss | 1.8–2.5% |
Impact: Skin intact, taste unchanged; capacity +300%.
Case 3: Beijing Bakery Factory (Oct 2025)
| Parameter | Data |
|---|---|
| Model | CVF-100 + CVF-300 dual-line |
| Products | Bread, cake, mooncake |
| Temp range | 80–90°C → 8–12°C (bread), 4–8°C (cake) |
| Cooling time | 35–50 min |
| Weight loss | 0.8–1.8% |
| Monthly output | 80 tons → 200 tons |
Impact: No crust collapse; output +150%.
4. Client Feedback
Shanghai: “Cooling time dropped from 30 to 8 min per tray. Weight loss cut 50%. No condensation — completely solved package swelling.”
Huangshanghuang: “Skin intact, taste identical to natural cooling. Capacity tripled. A true engineering upgrade for braised products.”
Beijing Bakery: “Crust intact, no collapse. Output from 80 to 200 tons/month. Solved the cooling bottleneck.”
5. Summary
- Cooling efficiency: 120–150 min → 30–50 min (75–80% ↓)
- Weight loss: 5–8% → 0.8–2.8% (3–6 kg extra per 100 kg)
- Food safety: Danger zone transit <20 min vs. >90 min
- Packaging: Zero condensation — no mold/swelling
For operations handling >1 ton/day, vacuum cooling is an engineering necessity, not an option.
FAQ
Q1: Difference from fruit/vegetable vegetable vacuum cooler?
A: Inlet temperature. Food cooler handles 75–90°C hot food; produce pre-cooler handles 25–30°C. Different vacuum pump, catcher sizing, and refrigeration load — not interchangeable.
Q2: Does it affect taste?
A: No. At 1.8–2.5% weight loss, braised products taste identical to naturally cooled. Bakery at 0.8–1.8% shows no collapse.
Q3: What does the model number mean?
A: Batch capacity. CVF-500 = 500 kg/batch, CVF-300 = 300 kg, CVF-100 = 100 kg.
Q4: Floor space required?
A: CVF-300: 8–10 m²; CVF-500: 12–15 m². Integrates into existing lines.
Q5: Payback period?
A: With 200–300% capacity gain + 3–6 kg/100 kg weight savings: typically 8–14 months.
Author: Yuanxian Machinery Application Engineering Department
Reviewer: Chen Gong (Senior Refrigeration Engineer)
Published: June 25, 2026
References:
[1] Shanghai CVF-500 Project Acceptance Report, 2025.
[2] Huangshanghuang CVF-300 Project Technical Summary, 2025.
[3] Beijing Bakery CVF Dual-Line Project Delivery Record, 2025.
[4] GB/T 20938-2022 Vacuum Cooling Equipment in the Food Industry.
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