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A/C SYSTEM COMPONENTS

A/C SYSTEM COMPONENTS. A/C System Components. Evaporator Condenser Compressor Expansion valve TXV Filter dryer Refrigerant hoses Control devices. A/C System. Condenser. Compressor. Evaporator. Filter dryer. Expansion valve. Evaporator core. Evaporator core with plaques.

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A/C SYSTEM COMPONENTS

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  1. A/C SYSTEM COMPONENTS

  2. A/C System Components • Evaporator • Condenser • Compressor • Expansion valve TXV • Filter dryer • Refrigerant hoses • Control devices

  3. A/C System Condenser Compressor Evaporator Filter dryer Expansion valve

  4. Evaporator core

  5. Evaporator core with plaques

  6. Air Conditioner Group AE - External air inlet AI - Recirculating air SPA - Recycle flap E - Evaporator core SM - Heater flap R - Heater core DA - Windscreen air flow BF - Front air flow DP - Floor air flow SDI / SDS - Air distribution flap

  7. Condenser(parallel flow) Gaseous refrigerant inlet 1 - Fan 2 - Condenser Liquid refrigerant outlet

  8. Condenser(refrigerant flow) Gas Liquid

  9. Condenser(hoses particular)

  10. A/C Compressors • Piston • Fixed and Variable stroke • Rotary vanes • Fixed stroke SD7B10 (Fixed) SD7H15 (Fixed) SP 10 (Fixed) V 5 (Variable) CVC (Variable) SS 10 SS121DS

  11. SS 10 Compressor(Rotary vanes) 1 - Suction port 2 - Discharge port 3 - Thermoswitch 4 - Oil separator 5 - Casing 6 - Vane 7 - Rotor 8 - Stator 9 - Discharge valves

  12. Harrison SP10(5 double effect pistons) 1 - twin-effect piston 2 - yoke 3 - swash disk 4 - back cylinder block 5 - shaft 6 - back housing 7 - front housing 8 - fron cylinder block

  13. Harrison V5 Compressor(Five piston, variable stroke) 1 - Swash plate 2 - Rod 3 - Piston 4 - Regulation valve 5 - Shaft

  14. V5 - Stoke regulation valve 1 - Valve casing 2 - Boost control capsule 3 - Regulation pin 4 - Sphere 5 - Return spring A - HP manifold B - Crankcase inlet C - Crankcase discharge D - LP manifold X - Crankcase to LP flow Y - HP to crankcase flow

  15. V5 - Regulation Stroke increasing Stroke decreasing

  16. Electro-magnetic clutch 1 - through bolt 2 - washer 3 - driving plate 4 - pulley assembly 5 - pulley 6 - dust shield 7 - bearing 8,9 - snap rings Seeger 10 - mounting bolt 11 - magnetic coil

  17. Piston Discharge chamber Variable orifice Crankcase Swash plate Suction chamber Swash Plate Externally Controlled Clutchless Compressor Min Displacement Max Displacement Discharge chamber Control valve (Open) Control valve (close) Suction chamber

  18. Clutchless Pulley

  19. Expansion valve TXV a 90°(internal equalization)

  20. TXV expansion valve - H type To Compressor’s Suction port From Filter dryer

  21. Valvola TXV ad H(particular)

  22. Filter dryer 1 - Casing 2 - Fittings block 3 - Inlet 4 - Outlet 5 - Pressure switch port 6 - Sight glass (*) 7 - Outlet pipe 8 - Higroscopic material 9 - Micro filter 10 - Holed screen

  23. Refrigerant hoses R134a 1 - Elastomer 2 - Textile plait renforcement 3 - Nylon barrier R12 1 - Elastomer 2 - Textile plait renforcement

  24. Fittings(examples) Male O-Ring 90° Male flanged 45° for expansion valve connection Male flanged 90° for expansion valve connection ROTALOCK 90° for compressor

  25. Refrigerant hoses(connection) 13/32” 1/2” 5/16” 5/16”

  26. Control devices • Pressure switch (trinary) • HP side protection • Condensation pressure regulation Controlled component: • Compressor • Condenser’s fan • Thermostatic switch • Evaporator’s temperature regulation Controlled component: • Compressor

  27. 1 2 3 4 5 6 Four levels Pressure switch Pmin Pmax 1° Step Fan 2° Step Fan working pressure values (A.P.) I. & II. livel Compressor ON: > 2,5 bar (min); < 28 bar (max) III. Livel Fan 1° Step : ON > 15 bar; OFF < 12 bar IV. livel Fan 2° Step : ON > 20 bar; OFF < 15 bar

  28. Wiring diagram(example) 1 - Pressure switch 2 - Compressor 3 - Thermostatic switch 4 - Relays 5 - Power source (+ 12V) 6 - Condenser’s fan 7 - Command signal from A/C switch

  29. Refrigerant hoses Lay-out TXV port evaporator quadrinary and H.P. ports 1/2” 5/16” (D.6) 5/16” Pressure dumper Compressor port Receiver dryer port 13/32” condenserport 5/16”

  30. Thanks for your attention

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