DKN-RHV-1500L is a continuous line model in the Kunning Cryo RHV series of immersion chillers. In the model designation, 1500 indicates the throughput class, and L indicates the continuous line structure. Its heat exchange method differs from air-cooling equipment: material is conveyed by a food-grade mesh belt and directly immersed in low-temperature freezing liquid for heat exchange. The freezing liquid can come into direct contact with food, and its thermal conductivity and heat capacity are higher than air. The complete machine consists of three parts: the tunnel line (cabinet, mesh belt, freezing liquid circulation), the compressor refrigeration unit, and the control system. The power distribution specification is 380V/50Hz.
The throughput, tank volume, and tunnel dimensions of this specification have no fixed values; they are determined by calculation based on material thickness, inlet temperature, and target core temperature, subject to the order technical annex.
Technical Parameters
| Item | Parameter |
|---|---|
| Equipment form | Tunnel-type continuous production line, mesh belt conveying + immersion heat exchange |
| Model designation meaning | RHV = compressor refrigeration · rapid cooling · tank; 1500 = throughput class; L = continuous line type |
| Heat exchange medium | Food-grade freezing liquid (can come into direct contact with food) + refrigerant |
| Freezing liquid temperature | This series of freezing liquid can go as low as -50℃ |
| Throughput / tank volume | Subject to order confirmation |
| Working temperature / temperature control accuracy | Subject to order confirmation |
| Tunnel cycle time | Subject to order confirmation (mesh belt variable frequency speed control) |
| Tunnel inner cabinet dimensions / equipment external dimensions | Subject to order confirmation |
| Refrigeration method | Compressor refrigeration unit + coolant circulation; unit selected according to throughput and target temperature |
| Power distribution specification | 380V/50Hz, three-phase five-wire |
| Total machine power | Subject to order confirmation |
| Control method | PLC + touchscreen, manual/automatic switching, PID automatic adjustment |
| Export configuration | If the export region requires 60Hz or other voltage levels, re-selection is subject to order |
Throughput varies with material type, piece weight, and packaging method.
Structure and Configuration
Cabinet and Insulation
- Inner and outer cavities are formed from SUS304 stainless steel plate by shearing, bending, and welding, with reinforcing ribs at load-bearing positions to resist deformation under long-term load.
- The insulation layer is a multi-layer thermal foam structure; cabinet insulation thickness is determined by model. The upper cover is a thermal insulation cover that can automatically flip to both sides and is removable.
- The lower part of the freezing tank converges at an incline, equipped with a freezing liquid discharge pipe and shut-off valve for easy drainage and cleaning.
Mesh Belt and Conveying
- Food-grade low-temperature dedicated conveying mesh belt, variable frequency speed control, equipped with automatic mesh belt tension adjustment device; the mesh belt surface is fitted with a pressure belt to help ensure material immersion.
- The circulation tank is a convection design, with spray pipes circulating at the bottom and both sides of the mesh belt to distribute liquid temperature evenly within the tank.
- The segmented lifting mesh belt rapidly lifts and discharges material at the tail end, reducing product temperature rise and condensate backflow into the tank; the mesh belt and support can be mechanically raised and lowered for maintenance and cleaning.
Discharge, Control, and Safety
- The discharge end is equipped with two stages of air knives plus high-pressure airflow for water removal; the tail air knife dries and is equipped with a freezing liquid recovery device to reduce carry-out loss.
- Control is PLC plus touchscreen, PID automatic adjustment, platinum resistance temperature measurement, automatic alarm and power-off at program end, supporting manual and automatic switching.
- Protection functions cover compressor overload and overcurrent, high and low pressure, over-temperature, phase sequence and phase loss, and anti-freeze protection.
Application Scenarios
| Scenario | Description |
|---|---|
| Aquatic processing | Shrimp, fish fillets, shellfish, and other individually quick-frozen materials that can be continuously fed |
| Cooked food and braised products | Continuous rapid cooling stage after cooking, reducing workshop stacking and waiting |
| Prepared dishes and frozen meals | Cooling or freezing stage after cooking, preceded by portioning and followed by packaging |
| Central kitchens and group catering | Continuous cooling aligned with portioning rhythm |
| Production line upgrades | Replacing batch cooling equipment, connecting upstream and downstream conveying lines |
For situations with small batch sizes and frequent product changeovers, a batch-type food rapid cooling cabinet can be used; for projects requiring lower temperatures and accepting liquid nitrogen consumption, see Liquid Nitrogen Quick Freezing vs. Mechanical Refrigeration Quick Freezing Comparison; for equipment forms, see the immersion chiller product line page.
Installation Conditions
- Site: Reserve operating passages, maintenance space, and a working area for freezing liquid tank cleaning according to equipment length.
- Power: 380V/50Hz three-phase five-wire; the wiring from the main line to the electrical control cabinet is to be laid in place by the buyer.
- Media: The site needs storage conditions for freezing liquid and refrigerant; water-cooled condenser configuration requires reserved space for a cooling water tower and circulating water circuit (subject to order confirmation).
- Ventilation: Set up ventilation according to site requirements to maintain heat dissipation conditions for the refrigeration unit and electrical control cabinet.
Warranty and After-Sales
The complete machine has a one-year warranty; after receiving fault information, a solution is provided within 2 hours; if the issue cannot be resolved remotely, arrival on site is within 24 hours, and the problem is resolved within 72 hours; one free on-site service visit per year, with long-term technical support provided after the warranty period.
Frequently Asked Questions
What is the throughput of DKN-RHV-1500L?
1500 is the throughput class, not a fixed capacity. The actual continuous throughput is calculated based on the material’s piece weight, thickness, inlet temperature, and target core temperature, measured in kilograms per hour.
Must the material be packaged, and can it directly contact the freezing liquid?
The freezing liquid is a food-grade medium that can come into direct contact with food, and packaging forms suitable for immersion are also permitted; bare material and packaged material have different thermal resistance, so cycle times must be determined separately.
What is the difference between it and DKN-RHV-1000L and DKN-RHV-2000L?
The three are continuous line models of the same series at different throughput classes. All have tunnel-type structures with mesh belt conveying plus immersion heat exchange. The differences lie in tunnel length, mesh belt effective width, and refrigeration unit configuration. This model’s throughput, freezing liquid temperature, and cycle time are calculated subject to order.
What should be prepared for the site and power distribution?
Power distribution is 380V/50Hz three-phase five-wire; total machine power is subject to order confirmation before determining capacity and wire diameter; the site should reserve passages, maintenance, and cleaning working areas according to equipment dimensions; water-cooled condenser configuration additionally requires reserved space for a cooling water tower.
To calculate tunnel length and refrigeration configuration according to material and production line rhythm, describe the material form, piece thickness, inlet temperature, target core temperature, and site conditions, and we will provide a plan based on actual requirements: Contact Us.