Version: 2026-08-04 | Model: CVF-1000A-2P (2 pallets / 1000 kg class)
Export destination: Canada | Power supply: 600 V / 60 Hz / 3P (North American standard)
Compressor: Copeland scroll ZB220KQE × 1 | Refrigerant: R404A | Vacuum pump: Leybold SV300 (Germany)
1. Project Design Summary
This project is a vacuum pre-cooling installation for rapid vegetable cooling, with an 8.0 m³ vacuum chamber and a 1000 kg capacity, designed to raise production efficiency and extend shelf life, with a pre-cooling temperature of 0–10°C.
Vacuum pre-cooling works on the physical principle that the boiling point of water falls as pressure drops: vegetables are placed in the vacuum chamber and the air is evacuated, and when the pressure reaches the set point the surface moisture begins to evaporate, carrying heat out of the product so that the vegetables cool evenly inside and out to the 2–5°C fresh-keeping temperature.
Functions unique to vacuum pre-cooling:
- Surface water removal: vegetables harvested in the rain can have surface water removed
- Healing function: small surface wounds on vegetables “heal”, reducing the chance of microbial entry
- Even cooling: vegetables cool inside and out at the same time, with no “cold outside, warm inside” dead zones
2. Construction Scale
| Item | Specification |
|---|---|
| Pre-cooler external dimensions | L4600 × W2200 × H2600 mm (subject to final design) |
| Vacuum chamber internal dimensions | L2600 × W1400 × H2200 mm |
| Vacuum chamber material | Q235 carbon steel, 6.0 mm thick, painted inside and out, washable with a high-pressure hose |
| Door system | Manual sliding door (single door all-in-one unit) |
| Equipment structure | All-in-one, single door |
3. Design Parameters
| Parameter | Value |
|---|---|
| Summer outdoor design dry bulb temperature (TWK) | 27 °C |
| Summer air conditioning outdoor design daily mean wet bulb temperature (TWS) | 28 °C |
| Condenser condensing temperature | 40 °C |
| Evaporating temperature | -5 °C |
4. Technical Specifications
| No. | Item | Specification / model | Remarks |
|---|---|---|---|
| 1 | Chamber volume | 8.0 m³ | L2600×W1400×H2200 mm, carbon steel 6 mm |
| 2 | Capacity per cycle | 1000 kg | Depends on the product |
| 3 | Processing time per cycle | 30–40 minutes | Depends on the product |
| 4 | Cooling capacity | about 82.6 kW | 71000 kcal/h |
| 5 | Operating power | about 40 kW | Reference value, subject to final design |
| 6 | Compressor | Copeland scroll ZB220KQE, 27.8 kW × 1 | R404A version, 600 V/60 Hz/3P (60 Hz North American version) |
| 7 | Refrigerant | R404A | Environmentally friendly refrigerant, ODP = 0 |
| 8 | Vacuum pump | Leybold SV300, 7.5 kW | German import, about 300 m³/h |
| 9 | Condenser | Air-cooled (water-cooled / evaporative optional) | Zhejiang Rongyi FNH200, 1.5 kW × 2 |
| 10 | Power supply | 600 V / 60 Hz / 3P (Canadian standard) | Auxiliary control circuit 220 V/60 Hz/1P |
| 11 | Maximum operating current | about 86 A | 200 A breaker recommended |
| 12 | Compressor starting current | about 218 A | |
| 13 | Equipment weight | 7800 kg | Estimate, subject to actual |
| 14 | Overall dimensions | L4600 × W2200 × H2600 mm | Subject to final design dimensions |
| 15 | Ultimate vacuum | ≤ 600 Pa | |
| 16 | Final produce temperature | 0–10 °C | Fresh-keeping range 2–5°C, adjustable |
| 17 | Weight loss | 1.0–2.0% | Varies slightly with vegetable variety |
| 18 | Noise | about 70 dB | Slightly louder when breaking vacuum |
5. Core Configuration List
| No. | Item | Brand | Origin | Qty | Unit |
|---|---|---|---|---|---|
| 1 | Refrigeration system (compressor) | Copeland ZB220KQE | USA | 1 | set |
| 2 | Vacuum pump system | Leybold SV300 | Germany | 1 | set |
| 3 | Water catcher system | Yuanxian Machinery | Dongguan | 1 | set |
| 4 | Refrigerant | R404A | China | 1 | batch |
| 5 | Condenser (air-cooled) | Rongyi | Zhejiang | 2 | set |
| 6 | Electrical cabinet | Yuanxian Machinery | Dongguan | 1 | set |
| 7 | Microcomputer control system | LS | Korea | 1 | set |
| 8 | HMI operating system | Weinview | Taiwan | 1 | set |
| 9 | Carbon steel vacuum chamber | Yuanxian Machinery | Guangdong | 1 | set |
| 10 | Pneumatic control system | AirTAC | Zhejiang | 1 | set |
| 11 | Temperature detection system | LS | Korea | 1 | set |
| 12 | Door system (manual sliding door) | Yuanxian Machinery | Dongguan | 1 | set |
6. Why These Components
1. Why a Copeland scroll compressor
| Item | Copeland scroll ZB220KQE (this proposal) | Copeland scroll 14.12 kW × 2 (twin) |
|---|---|---|
| Model | ZB220KQE × 1 unit | ZB114 class × 2 in parallel |
| Power | 27.8 kW | 28.24 kW (14.12 × 2) |
| Structure | Single unit, simple system | Twin units in parallel |
| Cooling capacity | about 82.6 kW | about 82.6 kW |
| Cost | Lower (1 compressor + 1 circuit) | Higher (2 units + dual circuits) |
| Maintenance | Single-machine maintenance, single spare parts set | Spares for two machines |
| Fault tolerance | No redundancy, stops on failure | Mutual standby, one failure allows reduced-load operation |
- A single ZB220KQE (27.8 kW) covers the 1000 kg / 30–40 minute cooling duty with the same cooling capacity as the twin option, but a simpler system and lower cost
- Verified knowledge base case: Mr Tang's two-pallet pre-cooler in Neijiang, Sichuan uses a single Copeland ZB220KQ (R22 version) with a domestic Dalutong vacuum pump and a water-cooled condenser, and that configuration has been delivered and is running
2. Why R404A refrigerant
- Environmental compliance: R404A is an HFC refrigerant with an ODP (ozone depletion potential) of 0, in line with international environmental trends
- Export compatibility: markets in Europe, North America and Southeast Asia restrict R22 (an HCFC) strictly, while R404A faces no phase-out pressure
- Performance match: it is a mature match with Copeland scroll compressors at a -5°C evaporating temperature
3. Why a Leybold SV300 vacuum pump (export to Canada)
- Pumping capability: Leybold SV300, pumping speed about 300 m³/h, 7.5 kW, the standard configuration for the 1000 kg class (knowledge base vacuum pump selection reference: 1000 kg = 1 × SV300)
- Canadian precedent: the Canadian EV three-pallet project uses a Leybold SV300 (480 V/60 Hz/3P with a transformer); Mr Zhang's two-pallet project in Canada uses an imported pump of the same class
- Export reliability: a German brand with a developed North American service network and high customer recognition
- Power compatibility: the 60 Hz version suits the Canadian 600 V/60 Hz/3P supply (large machines can use a transformer to step down to 480 V)
4. Power supply adaptation (export to Canada)
- Main supply: 600 V / 60 Hz / 3P (Canadian industrial standard)
- Auxiliary control circuit: 220 V / 60 Hz / 1P (stepped down from 600 V by a control transformer)
- Knowledge base precedents: Mr Zhang in Canada (600 V/60 Hz/3P, Bitzer compressor + Busch pump), Canadian EV (600 V/60 Hz/3P, 2 × Leybold SV300), ChangL in the USA (600 V/60 Hz/3P, Copeland ZB76KQE) — the Copeland ZB series in North American 60 Hz versions already has a delivery record
- Note the frequency difference: 60 Hz versions of the compressor, pump and fan must be selected for 60 Hz; a 50 Hz machine cannot be used directly (speed and cooling capacity both differ)
5. Vacuum pump selection rule
A Roots pump needs a backing pump to reach 1 kPa before it starts. This machine targets 600 Pa, which a single-stage vane pump satisfies, so no Roots pump is needed. Only large produce pre-coolers (≥10P / CVF-5000+) are fitted with Roots pumps.
7. Pricing and Payment
Equipment price and payment terms are quoted per project and confirmed in the formal contract. Contact sales@vacuum-fresh.com for a current quotation.
- Delivery within China
- One year of free warranty service
- Includes freight (standard delivery), installation and training
- Excludes unloading and lifting (the customer places the unit in position)
- Equipment only; water, electricity and civil works (including drilling) are provided by the customer
8. Installation and Commissioning
Customer responsibilities
- The power line from the main supply to the equipment control cabinet is installed by the customer
- Air exhaust, drainage and the associated concrete civil works are provided by the customer
- Unloading, moving, positioning and levelling of the equipment on arrival are the customer's responsibility
Supplier responsibilities
- The supplier transports the equipment to the customer site, including installation, training and freight
- The supplier arranges personnel to supervise lifting and positioning on site
- Personnel are dispatched to install and commission within 2 days of arrival
- Estimated installation time for the single unit is about 5 days
- Acceptance can be carried out once installation and commissioning are complete
9. After-Sales Service Commitment
| Response stage | Time limit |
|---|---|
| Telephone response | Immediate response on receipt of fault information |
| Solution provided | Within 8 hours |
| On-site arrival where remote support is insufficient | Within 48–72 hours |
| Fault cleared on site | Not exceeding 72 hours |
- One year warranty on the complete machine
- During the warranty period: faults caused by supplier design or manufacture are repaired free of charge
- After the warranty period: lifetime preferential technical support, the most favourable spare parts and after-sales service
Proposal data sources: Yuanxian Machinery knowledge base CVF-1000A-2P domestic pump proposal (2026-05-09), Copeland produce pre-cooling selection, CVF-1000-2P high-specification proposal