Device features

By car KIA Spectra control of heating and ventilation of interior performed independently from the air conditioning system when the function of heating and salon ventilation, defrosting and condensed moisture from the windshield and door glass blowing. At the same time the basic elements of work and the heater when the air conditioner. The nodes of a heater and air conditioner evaporator coil made in the same block.

The main units of the heater are:

- The heater heat exchanger (radiator) for heating the air in the passenger compartment warm engine coolant fluid;

- Electrically driven fan (blower), which provides an adjustable supply of outside air dampers to the heater and air conditioning;

- Temperature control damper air from the heater into the cabin, by changing the position of which depends on the amount of air passing through the heater heat exchanger, and the outdoor air flowing in the bypass heat exchanger;

- Air distribution flap entering the interior of the duct heater or heater to blow the windshield.

Appointment and operation of controls air conditioner described in Sec. 1 "The device is a vehicle" (see. "Heating (air-conditioning), and blower").

The mode switch of the fan operates independently of the air distribution control positions and control the temperature and controls the fan speed by varying the voltage in the power of the motor.

The air conditioning system includes the following elements.

The compressor is belt-driven by the engine crankshaft pulley. The compressor pulley built electromagnetic friction clutch, breaking the shaft of the compressor pulley or connecting them with the air conditioner on a signal of the electronic engine control unit. When the compressor compresses the refrigerant vapor coming to him from the evaporator coil, to a high pressure. The temperature of the refrigerant vapor at the outlet of the compressor is considerably higher than at the inlet.

The pressure reducing valve is integrated in the compressor and serves a protective function by increasing actuating pressure at the outlet of the compressor over the permissible value. The reason for triggering a pressure reducing valve failure can be high pressure switch, electric fan, etc.

Condenser coil, located in front of the radiator and the engine cooling system having a coil with fins developed for the rapid cooling and condensation of the compressor to the high vapor pressure of the refrigerant.

A throttle pipe with strainer inlet and outlet is installed in the pipeline supply liquid refrigerant to the evaporator. Orifice in the nozzle limits the flow of liquid refrigerant and lowers the pressure in the evaporator. After stopping the engine, liquid refrigerant continues to flow for a while after the throttle tube from the zone of high pressure in the low-pressure zone. The flow of liquid through the orifice is accompanied by a characteristic hissing sound which is heard for 30-60 seconds after the engine has stopped and is not a malfunction.

Evaporator coil. Liquid refrigerant condensing coil through the throttle nozzle enters the evaporator coil located in block heater. In the heat exchanger fluid passes to the gaseous state, absorbing heat. The moisture contained in the air supplied to the heat exchanger, condenses it, dripping from the evaporator and removed from the block heater. From the heat exchanger the evaporator refrigerant gas with a small amount of admixture of the liquid fraction of the refrigerant and the refrigerator oil drops enters into the receiver, which is connected to the outlet conduit of the evaporator.

Receiver. At the bottom of the housing of the receiver is a container of absorbent water vapor from the refrigerant vapor that getting rid of the moisture through the hole in the intake tube, mixed with the refrigeration oil. The upper housing fitting located receiver for joining pipes. Receiver neremontoprigoden and should be replaced only in gathering.

Scheme of the refrigerant in the air conditioning system shown in Fig. 11.1.