Underslung Belt-Driven Truck Refrigeration Unit | DEFU

1. Engine-Driven, No Auxiliary Power Unit

The compressor is belt-driven from the vehicle engine through a multi-ribbed serpentine pulley. There is no second engine to service, no separate fuel system, and no shore-power connection — one powertrain powers both the truck and the cold chain.

2. Underslung Condenser Saves Cargo Space

The condenser is a sealed 960 × 390 × 420 mm chassis-mounted unit, installed under the frame rails between the axles. Nothing intrudes into the cargo box and nothing sits above the roof line.

3. Four-Module Kit, One Supplier

Compressor, condenser, evaporator et controller intra-cabina sunt concordati, praetesti et una cum systemate expediti — cum charge refrigerantis, dispositione tuborum flexibilium et schemate connexionum definitis pro installatione.

4. Nucleus evaporatoris totus ex cupro

tubuli ex cupro purissimo (100 %) cum filetatione interna, exsiccator caeruleus hydrophilicus et vas ex acciaio inox. Tres foramina egressus horizontalia aera aequaliter distribuunt per longitudinem corporis, non in unico loco effundentes.

5. Refrigeratio stabilis in conditionibus ambientalibus altis

Aestimatus ad temperaturam ambientalem 30 °C cum potestate 2,65 kW (modello 280) et 3,5 kW (modello 380) ad temperaturam evaporationis 0 °C, retinens 1,59 kW / 1,96 kW usque ad −18 °C. Transmissio cinguli conservat velocitatem compressoris coniunctam velocitati motoris, ita ut capacitas maneat in ascensibus longis et in traffico denso.

6. Controllo digitalis intra-cabina, duplex schermum

The dash-mounted controller displays set point and actual box temperature simultaneously, with defrost, set, and up/down keys reachable from the driver's seat. 12 V / 24 V DC control platform.

1. Agere — The engine crankshaft drives a multi-ribbed belt, which turns the Guangyu 5S11 compressor mounted in the engine bay.
2. Compressio — Refrigerant R404A is compressed and discharged as high-pressure gas through the insulated pressure line.
3. Condensatio — The underslung condenser rejects heat through a 50-tube pure copper coil with dual high-flow fans, converting the gas to high-pressure liquid.
4. Metriatio — A brass thermal expansion valve controls refrigerant flow into the evaporator.
5. Refrigerans — The three-fan evaporator absorbs heat from the cargo box and returns low-pressure gas to the compressor. Temperature is set and monitored from the in-cab digital controller.

• Evaporator: tubuli de cupru pur 100 %, cu filet intern pentru transfer termic mai eficient; bobină cu aripă albastră hidrofilă pentru rezistență la coroziune și drenaj; carcasă din oțel inoxidabil, 1250 × 490 × 220 mm.
• Condensator: nucleu cu flux paralel integral din aluminiu, cu suprafață mare de răcire și carcasă masivă din oțel, 960 × 390 × 420 mm, protejat de o grilă perforată.
• Compressio: Corp din aluminiu turnat Guangyu 5S11, cu puley serpentin cu multipli nervuri; Guangyu 5H14 disponibil ca opțiune pentru modelul 380.
• Tubuli: liniile de cupru izolate, cu uscător-receptor și ventil de expansiune din alamă; toate îmbinările testate la etanșeitate și sistemul evacuat înainte de încărcare.

Kitul este conceput pentru instalare de către un constructor de caroserii sau un atelier, nu pentru retrofitare într-un reprezentanță comercială:

Fixați suportul condensatorului de șinele de bază ale cadrului, între axe, asigurându-vă că grila rămâne liberă față de eșapament și de cursa axei din spate.

Montați compresorul pe transmisia auxiliară a motorului; aliniați puley-ul cu arborele cotit și reglați tensiunea curelei conform specificațiilor.

Hang the evaporator from the front bulkhead, leaving clearance for the door and the cargo load line.

Route insulated lines along the frame, fit the receiver-drier and expansion valve, evacuate and charge with R404A.

Connect the controller harness in the cab, set the target temperature and verify pull-down.

Installation and commissioning manual, wiring diagram and hose routing drawing are supplied with every unit.

Light truck cold chain distribution

4.2 m box bodies moving chilled and frozen goods between distribution centres and retail outlets — the reference installation for this system.

Meat, dairy and frozen food delivery

Hold −18 °C across multi-drop routes where doors open frequently; the three-outlet evaporator re-cools the box quickly after each stop.

Pharmaceutical and temperature-sensitive logistics

Stable set-point control with in-cab readout and defrost cycles for 2–8 °C and frozen categories.

Fishery and agricultural transport

Continuous cooling from the point of catch or harvest, independent of mains power at either end of the route.

Engineering and service vehicles

Cooling for mobile workshops and specialised equipment cabins where a conventional reefer unit will not fit.

Programmata renovandi vehicula in factionibus

Kit standardizati pro distributoribus et fabricatoribus carrosseriarum, qui camiones leves iam existentes in configurationem refrigeratam convertunt.