Refrigerator Cyclopentane Foaming Line Project in China
Project draft for review
Project Overview
Illustration notice. Process illustrations are not verified photographs of this installation.
Project reference basis. Figures and configuration details are reported in the supplied project brief. They are reference values for the stated application, rather than verified acceptance results or a guarantee for another installation. Confirm the source records, material, tooling, operating schedule and test method when assessing a comparable project.
A global household appliance manufacturer in East China deployed Haifeng’s high-pressure cyclopentane foaming systems to upgrade its multi-door inverter refrigerator production line. The project focused on replacing an outdated offline-premixed foaming setup with an automated, high-precision online cyclopentane dosing and vacuum-assisted injection cell.
Prior to the overhaul, the manufacturer relied on pre-blended drums where volatile cyclopentane evaporated during intermediate storage, causing density variations between shifts. Furthermore, dispensing under atmospheric pressure restricted foam flow into thin-walled cabinet profiles, requiring higher pack weights (reaching a core density of 34 kg/m³) to avoid surface sinks and void defects around the vacuum insulation panels (VIP).
Haifeng delivered a turnkey foaming package featuring the HF-CP200-HP proportioner, an integrated online premixing skid, and vacuum-assisted mold docking interfaces. The line achieved stable, low-density foam distribution down to 30.5 kg/m³ while delivering superior thermal insulation, qualifying the refrigerators for Grade 1 energy efficiency ratings.
Solutions Delivery
Haifeng engineered an integrated foaming cell featuring advanced hydrocarbon explosion safety and automated process synchronization. Pure polyol is blended with liquid cyclopentane directly within an ATEX-certified inline skid using Coriolis mass flow feedback, holding cyclopentane concentrations stable at 12.5% ± 0.1%.
Chemical streams are delivered to a high-pressure impingement mixing head at 17.5 MPa. The mixing head mounts onto a servo-actuated docking carriage that mates with the injection port of the customer’s existing hydraulic cabinet clamping fixtures.
Before chemical discharge, an automated vacuum interface evacuates the closed refrigerator cabinet mold to 80 kPa absolute pressure. The high-velocity liquid stream fills the cabinet interior under negative pressure, allowing the expanding microcellular foam to flow effortlessly through 45 mm wall channels and wrap tightly around pre-installed VIP panels. Once the 28-second fill cycle completes, the hydraulic clean-out piston seals the head cleanly without requiring solvent flushes.
| Equipment | Model | Qty | Function |
|---|---|---|---|
| Cyclopentane High-Pressure Foamer | HF-CP200-HP | 2 sets | Core metering, fluid heating, and 17.5 MPa impingement injection. |
| Inline Cyclopentane Premixing Skid | HF-OPM-50 | 2 units | Continuous high-shear blending of cyclopentane into polyol at ±0.1% accuracy. |
| Vacuum-Assisted Mold Docking Interface | HF-VAM-01 | 4 sets | Automatically draws 80 kPa vacuum on cabinet molds prior to injection. |
| ATEX Gas Monitoring & Venting Panel | HF-GAS-Z2 | 1 set | Catalytic LEL monitoring and automated safety ventilation interlocks. |
Reported Project Results — Pending Record Verification
Transform Your Appliance Insulation Efficiency
Connect with Haifeng refrigeration engineers to evaluate high-pressure cyclopentane foaming equipment designed for energy-efficient refrigerators and freezers.
