🥬 🏭 Manufactured by Yuanxian Machinery

Vegetable Vacuum Cooler — Complete Series Guide

Name: Vegetable Vacuum Cooler — Complete Series Guide
Brand: Vacuum-Fresh
Availability: InStock
Rating: 4.8 (25 reviews)

🌡️ 25~30°C → 0~10°C in 20~40 min

Yuanxian CVF series vacuum coolers handle 500~5,000kg/batch, cooling from field temp to 0~10°C in 20~40 minutes for leafy greens, mushrooms, berries, cut flowers. CE/CSA certified.

Vegetable Vacuum Cooler — Complete Series Guide

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Why Pre-cool After Harvest?

Field heat left unchecked halves shelf life. Cold rooms take 8~12 hours and cool unevenly. Vacuum cooling pulls the chamber to ≤600Pa, where surface water vaporizes at near 0°C — absorbing heat directly from the produce. Even cooling from surface to core in 20-40 minutes.

How the CVF Series Works

Step	Component	What Happens
1	Vacuum pump	Draws chamber to ≤600Pa
2	(chamber)	Surface moisture vaporizes, absorbs heat
3	Cold trap	Captures vapor before it reaches the pump
4	Refrigeration	Maintains cold trap temperature

Controlled by LS (LG Korea) PLC + Weintek touchscreen. Set target temp, press start.

Models

Model	Pallets	Capacity	Chamber	Cooling	Power	Compressor	Vacuum Pump	Cycle
CVF-500	1P	~500 kg	4.3 m³	46.9 kW	29.2 kW	Copeland 22.9 kW	Busch 5.5 kW	15~30 min
CVF-1000A 🔍	2P	~1,000 kg	8.0 m³	84.8 kW	39.9 kW	Bitzer 30.7 kW	Leybold 5.5 kW	15~30 min
CVF-2000E 🔍	4P	~2,000 kg	16.0 m³	178 kW	77.8 kW	Hanbell 61.6 kW	11 kW	15~30 min
CVF-3000-6P	6P	~3,000 kg	22.8 m³	178 kW	89.3 kW	Hanbell 61.6 kW	22.5 kW	30~40 min
CVF-4000	8P	~3,000 kg	33.75 m³	280 kW	145 kW	Hanbell RC2-580B-Z	15 kW	15~30 min
CVF-4000W-10P 🔍	10P	~4,000 kg	31.46 m³	252 kW	99.7 kW	Hanbell 73.2 kW	7.5 kW×2+Roots	~30 min
CVF-6000	12P	~5,000 kg	—	590 kW	205 kW	Hanbell RC2-830B-Z	22.5 kW×3	25~40 min

Air-cooled, water-cooled, and evaporative condenser configs available.

🔧 Technical Specifications

Parameter	Value
Model	CVF-500A-1P (Air-Cooled, Single-Pallet)
Chamber Volume	4.3 m³ (L1400 × W1400 × H2000 mm)
Batch Capacity	500 kg (1 pallet)
Cycle Time	15–30 min (varies by produce)
Cooling Capacity	46.9 kW (40,300 kcal/h)
Operating Power	29.24 kW
Operating Current	52.5 A
Compressor	Copeland ZB Scroll, 22.9 kW
Vacuum Pump	Busch / DaLutong / Sino-German, 5.5 kW
Condenser	Air-cooled, Kaideli FV series, 2.34 kW
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Power Supply	380V / 50Hz / 3P (60Hz available)
Overall Dimensions	L5280 × W1790 × H2720 mm
Machine Weight	5,200 kg
Water Loss Rate	1–2%
Temperature Uniformity	≤±1°C across chamber
Door Type	Sliding pneumatic seal
Chamber Material	Carbon steel, anti-corrosion coated
Certifications	CE / CSA / BV

⚙️ Standard Configuration

Component	Brand	Origin
Compressor	Copeland ZB Scroll	USA
Vacuum Pump	Busch Rotary Vane	Germany
Condenser	Kaideli FV Series	Zhejiang, China
Water Catcher	Yuanxian (in-house)	Dongguan, China
PLC Controller	LS Electric	South Korea
Touch Screen	Weintek (Taiwan)	Taiwan
Pneumatic System	AirTAC	Taiwan
Temperature Sensors	LS multi-point PT100	South Korea
Chamber Material	Carbon steel (SUS304 optional)	Guangdong, China

🌱 Applications

Product	Cycle	Target Temp
Leafy Greens (lettuce, spinach)	15–25 min	2–5 °C
Mushrooms	15–25 min	2–5 °C
Soft Fruits (strawberry, blueberry)	20–30 min	2–5 °C
Cut Flowers	15–20 min	2–5 °C
Herbs (mint, basil, cilantro)	15–20 min	2–4 °C

💡 Key Advantages vs Cold Room

Aspect	CVF-500A-1P Vacuum	Traditional Cold Room
Cooling time (25→4 °C)	20–30 min	2–4 hours
Weight loss	1–2%	3–8%
Temperature uniformity	±1 °C	5–8 °C difference
Shelf life extension	3–7 days	Limited
Energy use	Only during cycle (~30 min)	Continuous 24h

🔬 Working Principle

The CVF-500A-1P uses flash evaporative cooling under vacuum. When chamber pressure drops to ≤600 Pa, water on the produce surface boils at near 0°C, absorbing latent heat (≈2260 kJ/kg) directly from the product. The Copeland ZB scroll compressor maintains the water catcher for moisture capture. Temperature sensors trigger automatic stop at the target setpoint. The entire cycle completes in 20–30 minutes, compared to 2–4 hours for conventional cold rooms.

🔧 Technical Specifications

Parameter	Value
Model	CVF-1000A-2P
Chamber Volume	8 m³
Batch Capacity	800–1,000 kg
Cooling Time	15–30 min
Cooling Capacity	84.8 kW (72,900 kcal/h)
Connected Power	39.9 kW
Compressor	BITZER 6H series, 30.7 kW
Vacuum Pump	LEYBOLD SV series, 5.5 kW
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Power Supply	380V/50Hz/3P or 480V/60Hz/3P
Dimensions	L5660 × W2200 × H2500 mm
Weight	7,800 kg
Door	Sliding hydraulic with pneumatic seal
Refrigerant	R404A / R448A
Certifications	CE / CSA / BV / SGS / UL

⚙️ Standard Configuration

Component	Brand	Origin
Compressor	BITZER	Germany
Refrigeration Parts	DANFOSS	Denmark
Condenser	KAIDELI	Zhejiang, China
Water Catcher	Yuanxian (in-house)	Dongguan, China
Vacuum Pump	LEYBOLD	Germany
PLC Controller	LS Electric	South Korea
Touch Screen	WEINVIEW	Taiwan
Chamber Material	Carbon steel (SUS304 optional)	—

🌱 Applications

Product	Cycle	Target Temp
Leafy Greens	20–25 min	1–4 °C
Mushrooms	15–25 min	2–5 °C
Cut Flowers	15–20 min	2–4 °C
Soft Fruits	20–30 min	2–5 °C
Sprouts & Herbs	15–20 min	1–4 °C
Export Produce	20–25 min	0–2 °C

💡 Key Advantages over Forced-Air Cooling

Aspect	Vacuum Cooling	Forced-Air Cooling
Cooling time (25→4 °C)	20–30 min	4–12 hours
Weight loss	1.5–3%	3–5%
Temperature uniformity	±1 °C	±3–5 °C
Energy per kg	0.016–0.025 kWh/kg	0.05–0.15 kWh/kg
Floor space	12 m²	20–40 m²

🔬 Working Principle

The chamber is evacuated to ≤600 Pa. At this pressure, water on the produce surface vaporizes at near 0 °C, absorbing latent heat directly from the product. The BITZER compressor maintains the water catcher (cold trap) at -5 to -15 °C, capturing moisture as ice and protecting the vacuum pump. Temperature sensors trigger automatic stop at the target temperature.

🔧 Technical Specifications

Parameter	Value
Model	CVF-1000E-2P (Evaporative Condenser)
Chamber Volume	8 m³
Batch Capacity	800–1,000 kg
Cooling Time	15–30 min
Cooling Capacity	84.8 kW (72,900 kcal/h)
Connected Power	39.9 kW
Compressor	BITZER 6H series, 30.7 kW
Vacuum Pump	LEYBOLD SV300, 5.5 kW
Condenser	Evaporative type, YFL-S-320
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Power Supply	380V/50Hz/3P or 480V/60Hz/3P
Overall Dimensions (L×W×H)	5660 × 2200 × 2500 mm (incl. condenser)
Machine Weight	~8,200 kg
Door	Sliding hydraulic with pneumatic seal
Chamber Material	Q235 carbon steel, anti-corrosion coating
Refrigerant	R404A / R448A
Design Life	15 years
Certifications	CE / CSA / BV / SGS / UL

⚙️ Standard Configuration

Component	Brand	Origin
Compressor	BITZER	Germany
Refrigeration Parts	DANFOSS	Denmark
Condenser	Evaporative YFL-S-320	Zhejiang, China
Water Catcher	Yuanxian (in-house)	Dongguan, China
Vacuum Pump	LEYBOLD	Germany
PLC Controller	LS Electric	South Korea
Touch Screen	WEINVIEW	Taiwan
Chamber Material	Carbon steel (SUS304 optional)	—
Hydraulic System	3 HP, sliding door	Guangdong

🌱 Applications

Product	Cycle	Target Temp
Leafy Greens	20–25 min	1–4 °C
Mushrooms	15–25 min	2–5 °C
Cut Flowers	15–20 min	2–4 °C
Soft Fruits	20–30 min	2–5 °C
Sprouts & Herbs	15–20 min	1–4 °C
Export Produce	20–25 min	0–2 °C

💡 Key Advantages over Forced-Air Cooling

Aspect	Vacuum Cooling	Forced-Air Cooling
Cooling time (25→4 °C)	20–30 min	4–12 hours
Weight loss	1.5–3%	3–5%
Temperature uniformity	±1 °C	±3–5 °C
Energy per kg	0.016–0.025 kWh/kg	0.05–0.15 kWh/kg
Floor space	12 m²	20–40 m²

🔬 Working Principle

The CVF-1000E-2P operates on evaporative cooling under vacuum. When chamber pressure drops to ≤600 Pa, water on the produce surface vaporizes at near 0 °C, absorbing latent heat directly from the product. The BITZER compressor maintains the water catcher at -5 to -15 °C, capturing moisture as ice. The evaporative condenser delivers 15–20% better energy efficiency than air-cooled systems in hot climates by maintaining a stable 40 °C condensing temperature. Temperature sensors trigger automatic stop at the target setpoint.

⭐ Why Choose the E-Series?

Feature	Benefit
Evaporative condenser	15–20% lower energy consumption vs. air-cooled; ideal for ambient temps >35 °C
Compact footprint	Integrated condenser design saves valuable floor space
Proven Bitzer compressor	Global service network, reliable 15-year design life
Dual-frequency capable	50/60 Hz compatible for export markets

🔧 Technical Specifications

Parameter	Value
Model	CVF-2000E-4P (Evaporative Condenser)
Chamber Volume	16 m³ (L5200 × W1400 × H2200 mm)
Batch Capacity	1,800–2,000 kg
Cooling Time	25–35 min
Cooling Capacity	178 kW (153,000 kcal/h)
Connected Power	~77.8 kW
Compressor	Hanbell Screw 61.6 kW (or Bitzer CSH7573)
Vacuum Pump	Leybold SV300 × 2, 11 kW total
Condenser	Evaporative type, 5.2 kW fans + pump
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Power Supply	380V / 50Hz / 3P
Overall Dimensions	L12000 × W2200 × H2600 mm (incl. condenser)
Machine Weight	14,500 kg
Door Type	Hydraulic sliding with pneumatic seal
Chamber Material	Q235 carbon steel, epoxy anti-corrosion coating
Refrigerant	R404A (R449A optional)
Design Life	15 years
Certifications	CE / CSA / BV / SGS / UL

⚙️ Standard Configuration

Component	Brand / Spec	Qty
Screw Compressor	Hanbell (Taiwan) 61.6 kW / Bitzer CSH7573	1
Evaporator (Water Catcher)	YXEV-42, 42 m² heat exchange, seamless coil	1
Condenser	Evaporative YFL-S-320, fans + water pump	1
Expansion Valve	Danfoss TES55-60, external equalizer	1
Vacuum Pump	Leybold SV300 (Germany) / Busch RD0360A	2
Vent Valve	Pneumatic butterfly DN100	1
PLC Controller	LS Electric (South Korea)	1
Touch Screen	Weintek (Taiwan), 10-inch	1
Hydraulic System	3HP, for sliding door operation	1
Temperature Sensors	PT100 RTD, 4-point measurement	4
Refrigerant	R404A, 70 kg charge	—

🌱 Applications

Product	Cycle	Target Temp	Loading
Leafy Greens (lettuce, spinach, kale)	25–35 min	0–2 °C	1,800–2,000 kg
Fruit Vegetables (tomato, pepper, cucumber)	25–35 min	2–5 °C	1,600–1,800 kg
Soft Fruits (strawberry, blueberry, lychee)	20–30 min	0–2 °C	1,500–1,800 kg
Mushrooms & Edible Fungi	20–30 min	0–2 °C	1,600–2,000 kg
Cut Flowers	25–35 min	2–5 °C	1,200–1,600 kg
Export Produce (HK/EU bound)	25–30 min	0–1 °C	1,800–2,000 kg

💡 Key Advantages over Forced-Air Cooling

Aspect	Vacuum Cooling	Forced-Air Cooling
Cooling time (25→4 °C)	25–35 min	12–24 hours
Weight loss	2.5–3.5%	3–8%
Temperature uniformity	±2 °C	±5–8 °C
Energy per kg	~0.018 kWh/kg	0.08–0.15 kWh/kg
Daily throughput (8h)	20–24 tons	4–8 tons

🔬 Working Principle

The CVF-2000E-4P operates on evaporative cooling under vacuum. When chamber pressure drops to ≤600 Pa, water on the produce surface vaporizes at near 0 °C, absorbing latent heat (~2257 kJ/kg) directly from the product. The Hanbell screw compressor maintains the 42 m² water catcher at -5 to -15 °C, capturing moisture as ice. The evaporative condenser rejects heat at a stable 40 °C condensing temperature, delivering 15–20% better energy efficiency than air-cooled systems. Temperature sensors trigger automatic stop at the target setpoint.

⭐ Customer Case: Yunnan Driscoll's

Metric	Before	After CVF-2000
Cooling time (25→2 °C)	6–8 hours	20–25 min
Weight loss	4–5%	<2%
Shelf life	4–5 days	14 days
Transport spoilage	12%	<3%

🔧 Technical Specifications

Parameter	Value
Model	CVF-1500A-3P (Air-Cooled)
Chamber Volume	11.24 m³ (L3650 × W1400 × H2200 mm)
Batch Capacity	1,500 kg (≈3 pallets)
Cycle Time	30–45 min
Cooling Capacity	64 kW
Connected Power	40.5 kW
Max Operating Current	110.2 A
Compressor	Copeland 15 HP × 2 (dual, redundant)
Vacuum Pump	DaLutong / Sino-German 7.5 kW
Condenser	Air-cooled, RongYi brand, 3 kW
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Refrigerant	R22 (field-upgradable to R404A/R449A)
Controller	LS PLC (Korea) + Weinview HMI (Taiwan)
Pneumatic System	AirTAC (Taiwan)
Temperature Sensors	PT100 A-class, accuracy ±0.15°C
Power Supply	380V / 50Hz / 3P
Overall Dimensions	L5380 × W2262 × H2576 mm (incl. peripherals)
Chamber Material	Q235 carbon steel + paint (304 SS optional)

⚙️ Standard Configuration

Component	Brand / Spec
Compressor	Copeland 15 HP × 2 (dual-compressor, redundant)
Refrigeration Parts	DANFOSS
Condenser	Air-cooled, RongYi
Water Catcher	Yuanxian (in-house)
Vacuum Pump	DaLutong / Sino-German 7.5 kW
PLC Controller	LS Electric (South Korea)
Touch Screen	Weintek (Taiwan)
Chamber Material	Q235 steel (SUS304 upgrade available)

🌱 Applications

Product	Typical Load	Target Temp	Cycle
Leafy greens (lettuce, spinach)	800–1,000 kg	2 °C	~30 min
Fruit vegetables (broccoli, peppers)	1,200–1,500 kg	5 °C	~35 min
Mushrooms (shiitake, oyster)	800–1,000 kg	2 °C	~25 min
Root vegetables (carrots, potatoes)	1,200–1,500 kg	4 °C	~40 min
Cut flowers (roses, lilies)	500–800 kg	2 °C	~20 min

💡 Key Advantages

Feature	How It Works
🔧 Dual compressor redundancy	One compressor runs at 50–60% capacity if the other fails
⚡ Staggered startup	Reduces grid surge by half
🧹 Washable chamber	Q235 steel interior can be pressure-washed
🌐 Multi-language HMI	Weinview panel supports multiple languages
🔄 Refrigerant upgrade path	R22 → R404A/R449A, field-upgradable

🔬 Working Principle

Vacuum cooling relies on a basic physics principle: water boils at lower temperature when pressure drops. Produce placed in the vacuum chamber is drawn down to ≤600 Pa. Surface moisture evaporates rapidly, pulling heat out of the product. The dual Copeland compressors maintain the water catcher at -5 to -15 °C, capturing moisture as ice. Temperature sensors trigger automatic stop at the target setpoint.

🔧 Technical Specifications

Parameter	Value
Model	CVF-1500A-3P (Air-Cooled)
Chamber Volume	11.24 m³ (L3650 × W1400 × H2200 mm)
Batch Capacity	1,500 kg (≈3 pallets)
Cycle Time	30–45 min
Cooling Capacity	64 kW
Connected Power	40.5 kW
Max Operating Current	110.2 A
Compressor	Copeland 15 HP × 2 (dual, redundant)
Vacuum Pump	DaLutong / Sino-German 7.5 kW
Condenser	Air-cooled, RongYi brand, 3 kW
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Refrigerant	R22 (field-upgradable to R404A/R449A)
Controller	LS PLC (Korea) + Weinview HMI (Taiwan)
Pneumatic System	AirTAC (Taiwan)
Temperature Sensors	PT100 A-class, accuracy ±0.15°C
Power Supply	380V / 50Hz / 3P
Overall Dimensions	L5380 × W2262 × H2576 mm (incl. peripherals)
Chamber Material	Q235 carbon steel + paint (304 SS optional)

⚙️ Standard Configuration

Component	Brand / Spec
Compressor	Copeland 15 HP × 2 (dual-compressor, redundant)
Refrigeration Parts	DANFOSS
Condenser	Air-cooled, RongYi
Water Catcher	Yuanxian (in-house)
Vacuum Pump	DaLutong / Sino-German 7.5 kW
PLC Controller	LS Electric (South Korea)
Touch Screen	Weintek (Taiwan)
Chamber Material	Q235 steel (SUS304 upgrade available)

🌱 Applications

Product	Typical Load	Target Temp	Cycle
Leafy greens (lettuce, spinach)	800–1,000 kg	2 °C	≈30 min
Fruit vegetables (broccoli, peppers)	1,200–1,500 kg	5 °C	≈35 min
Mushrooms (shiitake, oyster)	800–1,000 kg	2 °C	≈25 min
Root vegetables (carrots, potatoes)	1,200–1,500 kg	4 °C	≈40 min
Cut flowers (roses, lilies)	500–800 kg	2 °C	≈20 min

💡 Key Advantages

Feature	How It Works
🔧 Dual compressor redundancy	One compressor runs at 50–60% capacity if the other fails
⚡ Staggered startup	Reduces grid surge by half
🧷 Washable chamber	Q235 steel interior can be pressure-washed
🌐 Multi-language HMI	Weinview panel supports multiple languages
🔄 Refrigerant upgrade path	R22 R404A/R449A, field-upgradable

🔬 Working Principle

Temperature Reference

Product	Initial	Target	Cycle	Shelf Life Gain
Leafy greens	28°C	2~4°C	20-25 min	7 14+ days
Mushrooms	25°C	4~6°C	25-30 min	3 10+ days
Broccoli / Cauliflower	28°C	2~4°C	25-30 min	5 12+ days
Berries	26°C	4~6°C	25-35 min	3 8+ days
Cut flowers	28°C	4~8°C	20-30 min	Longer vase life when combined with proper cold-chain management

Applications

Product	Why It Works	Typical Result
🥤 Leafy greens	High surface moisture = fastest cooling	2~3 tons/hr per CVF-1000
🍄 Mushrooms	Stops browning at source	+3~5 days storage
🦀 Berries & soft fruits	Vacuum suppresses mold	Extends shelf life with MAP
💐 Cut flowers	Removes field heat before air freight	Reduces wilting

Key Advantages

⚡ Speed — 20~40 min cycles, 10~20× faster than cold rooms
🎯 Uniformity — ≤2°C difference, surface to core
💦 Moisture control — 2~5% loss, adjustable
📦 Package-ready — Ventilated cartons go straight in
🌬 Surface drying — Rain-harvested produce dries during cycle

Selection Guide

Daily Throughput	Recommended	Pallets
1~3 tons	CVF-500 / CVF-1000	1~2P
3~6 tons	CVF-1500W / CVF-2000	3~4P
6~12 tons	CVF-3000-6P	6P
12~20 tons	CVF-4000 / CVF-4000W	8~10P
20+ tons	CVF-6000 or multiple units	12P+

Based on 4~6 hrs/day operation.

🔧 Technical Specifications

Parameter	Value
Model	CVF-3000E-6P (Evaporative Condenser, 6-Pallet)
Batch Capacity	3,000 kg (leafy greens baseline)
Chamber Volume	24.75 m³ (L4200 × W2500 × H2200 mm)
Cycle Time	30–40 min
Cooling Capacity	172.8 kW (148,600 kcal/h)
Total Running Power	87.7 kW (running current 141A)
Max Current	197A (recommended breaker ≥300A)
Compressor	BITZER screw, 61.5 kW
Vacuum Pump	Leybold SV300 × 3, 22.5 kW total
Condenser	Evaporative, 3.7 kW
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C (adjustable)
Power Supply	380V / 50Hz / 3P
Overall Dimensions	L9800 × W2800 × H2500 mm
Machine Weight	15,500 kg
Door Type	Hydraulic sliding
Certifications	CE / CSA / BV / SGS / UL

⚙️ Standard Configuration

Component	Brand / Spec	Origin	Qty
Screw Compressor	BITZER 61.5 kW	Germany	1
Vacuum Pump	Leybold SV300	Germany	3
Evaporative Condenser	Custom, 3.7 kW	Guangdong, China	1
Water Catcher	Yuanxian (in-house)	Dongguan, China	1
PLC Controller	LS Electric	South Korea	1
Touch Screen	Weintek	Taiwan	1
Chamber Material	Q235 carbon steel (SUS304 optional)	—	1
Pneumatic System	JIMY	Shanghai	1

📊 4-Tier Configuration Options

Tier	Compressor	Vacuum Pump	Condenser	Recommended For
Tier 1	BITZER screw 61.5kW	Leybold SV300×3	Evaporative	Export / high-end domestic
Tier 2	Hanbell screw 61.6kW	Busch RD0360A×3	Evaporative	SE Asia export / mid-high end
Tier 3	BITZER piston×2	DaLutong×3	Evaporative or water-cooled	Domestic processing centers
Tier 4	Copeland scroll×4	DaLutong×3	Air-cooled	Budget / no water source

🌱 Suitable Produce

Category	Performance	Notes
Leafy greens (lettuce, spinach, bok choy, kale)	🟢 Excellent	Optimal for "big chamber, matched cooling"
Mushrooms (enoki, shiitake, oyster)	🟢 Excellent	Porous structure cools even faster
Mixed vegetables (leafy greens dominant)	🟢 Good	Root veg may need +5-10 min
Fresh-cut flowers	🟢 Good	Requires respiration-inhibition cycle tuning
Root vegetables / fruits	🟡 Not optimal	Standard 6-pallet full-spec recommended

🎯 Key Advantages

Advantage	Details
🌿 Purpose-built for leafy greens	Chamber geometry optimized for low-density, high-volume produce
🛠 Engineered, not guessed	172.8kW cooling verified by heat load calculation (172.3kW actual, deviation <0.3%)
🇩🇪 Global component sourcing	BITZER compressor (Germany) + Leybold vacuum pump (Germany) + LS control (Korea)
🔧 4-tier configurable	One chamber, four budget points
📉 Evaporative condenser efficiency	15~20% higher efficiency than air-cooled

🔬 Working Principle

The vacuum pump system reduces chamber pressure below 600Pa. Water on the produce surface boils at low temperature, absorbing latent heat and rapidly dropping temperature. The BITZER compressor maintains the cold trap (evaporator) at -10°C~-15°C, where vapor condenses and releases ~2500kJ/kg of latent heat — transferred through the refrigerant cycle to the outdoor evaporative condenser. Vacuum pumps handle only non-condensable gases, extending pump service life.

🔢 Engineering Verification

Sensible heat: Q_s = 3000 × 3.8 × (25-5) / (30×60) = 126.7 kW
Latent heat (3-4% surface moisture): Q_l ≈ 126.7 × 0.36 = 45.6 kW
Total load: Q_total = 126.7 + 45.6 = 172.3 kW
Installed: 172.8 kW → deviation <0.3%
Pump speed: Leybold SV300×3 = ~900 m³/h
Pull-down to 600Pa: ~12-15 min

🔧 Technical Specifications

Parameter	Value
Model	CVF-1000W-2P (Water-Cooled, 2-Pallet)
Chamber Volume	8 m³
Batch Capacity	800–1,000 kg
Cycle Time	30–40 min
Cooling Capacity	84.8 kW (72,900 kcal/h)
Operating Power	~40 kW
Max Current	84A (recommended MCB: 150A)
Compressor	Bitzer 30.7 kW (Germany)
Vacuum Pump	Leybold 5.5 kW (Germany)
Condenser	Water-cooled shell-and-tube
Ultimate Vacuum	≤600 Pa
Target Temp	0–10 °C
Water Loss	≤2%
Power Supply	380V / 50Hz / 3P
Overall Dimensions	L5600 × W2200 × H2500 mm
Machine Weight	~7,800 kg
Door Type	Hydraulic sliding
Certifications	CE / CSA / BV / SGS / UL

⚙️ Core Components

Component	Brand	Origin
Compressor	Bitzer	Germany
Vacuum Pump	Leybold	Germany
Condenser	Shell-and-tube water-cooled	Guangzhou
Vapor Catcher	Yuanxian YXEV Series	Dongguan
PLC Controller	LS	South Korea
HMI Touchscreen	Weinview	Taiwan
Chamber	Carbon steel, food-grade paint	Guangdong
Electrical System	JIMAI	Shanghai

💧 Why Water-Cooled?

Feature	Advantage
Stable condensing temp (38–42°C)	Consistent performance regardless of ambient temperature
Lower head pressure	Compressor runs cooler, extends service life
No hot air exhaust	Suitable for indoor installation
Compact footprint	No large air-cooled condenser bank needed

🆚 vs Forced-Air Cooling

Aspect	CVF-1000W-2P Vacuum	Traditional Forced-Air
Cooling time	30–40 min	4–8 hours
Water loss	≤2%	6–10%
Energy consumption	7–9 kWh/ton	24–30 kWh/ton
Temperature uniformity	Uniform core to surface	Surface cools fast, core lags
Daily throughput (8h)	12–16 tons	2–4 tons

🌱 Applications

Product	Performance
Leafy greens (lettuce, spinach, bok choy)	🟢 Excellent
Mushrooms (enoki, shiitake, oyster)	🟢 Excellent
Soft fruits (strawberry, blueberry, lychee)	🟢 Good
Cold chain hub inbound produce	🟢 Excellent

❓ Site Requirements

Requirement	Specification
Cooling water system	Cooling tower + water pump, 3–5 m³/h circulation
Water supply	Stable tap or recirculated water
Power supply	380V / 50Hz / 3P, MCB ≥150A
Foundation	Level concrete, load capacity ≥10 tons

🔧 Technical Specifications

Parameter	Value
Model	CVF-4000W-10P (Water-Cooled, 10-Pallet)
Batch Capacity	4,000 kg (leafy greens baseline)
Chamber Volume	31.46 m³ (L6500 × W2200 × H2200 mm)
Cycle Time	~30 min (leafy greens)
Cooling Capacity	252.2 kW
Total Running Power	99.7 kW
Ultimate Vacuum	≤600 Pa
Compressor	Hanbell screw, 73.2 kW
Vacuum Pump	Dalutong vane 7.5kW × 2 + Roots 7.5kW
Condenser	Shell-and-tube water-cooled, 4.0 kW
Target Temp	0–10 °C (adjustable)
Power Supply	460V / 60Hz / 3P
Machine Footprint	L2800 × W1900 × H1800 mm (refrigeration unit)
Machine Weight	~14,500 kg
Certifications	CE / CSA / BV / SGS / UL

⚙️ Standard Configuration

Component	Brand / Spec	Qty
Refrigeration System	Hanbell screw compressor	1 set
Vacuum Pump Set	Dalutong vane 300 + Roots 2600	1 set
Condenser	Shell-and-tube water-cooled	1 set
Refrigerant	R22	—
Control System	LS Electric (Korea)	1 set
Touch Screen	Weintek (Taiwan)	1 set
Water Catcher	Yuanxian (in-house)	1 set
Chamber Material	Carbon steel Q235, painted (SUS304 optional)	1 set
Electric Drive	Jimai (Shanghai)	1 set
Circulation Pump	Yuanli (China)	1 set
Temperature Sensors	LS (Korea)	1 set

🌡️ Recommended Temperature Settings

Product Type	Target Temp	Processing Time
Leafy greens (lettuce, spinach, bok choy)	2–5 °C	~30 min
Mushrooms (king oyster, enoki)	3–8 °C	~35 min
Fruits (strawberry, blueberry, lychee)	5–10 °C	35–40 min
Cut flowers	2–5 °C	~30 min

✅ Key Advantages

Advantage	Detail
💧 Low water loss	Only 1–2%, preserves fresh weight
⏱ High throughput	30 min/cycle, 32–40 tons/day
🌿 Post-rain harvest	Removes surface moisture, reduces spoilage
🛠 Water-cooled	Efficient shell-and-tube condenser

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Standard Configuration

Component	Brand	Origin
Compressor	Copeland / BITZER / Hanbell	USA / Germany / Taiwan
Vacuum Pump	Busch / Leybold / Rietschle	Germany
Electrical	LS Electric	Korea
HMI	Weintek	Taiwan
Chamber	AISI 304 Stainless Steel	—

Certifications: CE / CSA / BV / SGS / UL

Optional Configuration

Water-cooled or evaporative condenser for tropical climates
220V/60Hz, 380V/60Hz or 600V/60Hz electrical configuration
Stainless steel chamber (304) for high-hygiene facilities
Data logging and cold-chain temperature records
Automatic door systems for large models
Pre-cooling + cold storage integrated solutions

Installation Requirements

Item	Requirement
Power Supply	380V / 50Hz / 3P (or 415V / 480V / 60Hz on request)
Floor Space	Chamber + condenser + control cabinet, allow 1m access on all sides
Foundation	Level concrete floor, load capacity per machine weight (see model spec)
Cooling Water (water-cooled models)	5-8 m³/h @ 10-30°C, with inlet filter
Drain	Floor drain near chamber for cleaning and defrost water
Ventilation	Air-cooled models: keep 1m clearance around condenser for airflow
Installation Service	Remote video guidance included; technician dispatch within 2 days of arrival

Cooling Curve

Typical measured results for the CVF series (product-dependent):

Product	Initial	Target	Typical Time
Leafy greens (lettuce, spinach)	25–30°C	2–4°C	20–30 min
Mushrooms	25°C	4°C	25–35 min
Berries (blueberry, strawberry)	25–28°C	4°C	20–30 min
Cut flowers	25°C	4°C	25–40 min

The fastest temperature drop occurs in the first 10–15 minutes as surface moisture evaporates. Operating vacuum: ≤600 Pa; typical operating range 600–660 Pa depending on product and process.

⚠️ Representative curves are available from our engineering team for your specific crop and batch. Request a cooling test with your own product sample.

FAQ

How long does vacuum pre-cooling take? Typical cycle time is 20-40 minutes depending on product, batch weight and target temperature. Leafy greens cool from 28°C to 2-4°C in about 20-25 minutes; berries and thicker products take 25-40 minutes.

What is the typical water loss? 1-2% for most produce when the cycle is stopped at the target temperature. Compared with 3-8% in a traditional cold room, vacuum pre-cooling preserves more saleable weight.

Which products work best? Products with high surface moisture and large surface area — leafy greens, mushrooms, herbs, berries, cut flowers — cool fastest. Thick-skinned or waxy products (potatoes, onions, tomatoes) need pre-wetting or are less suited.

Do I still need a cold room? Yes. The pre-cooler removes field heat quickly, then the cold room maintains the target temperature for storage and transport. The two systems work together.

Can the machine run continuously? Yes. With alternating defrost on the cold trap, production lines can run continuously through peak harvest hours.

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