Service of the Infiniti QX4 since 1996 of release
1. Introduction
2. Maintenance instruction
3. Routine maintenance
4. Engine
5. Cooling system and heating
5.1. Specifications
5.2. Antifreeze - general information
5.3. Service of the cooling system
5.4. Removal, installation and check of serviceability of functioning of the thermostat
5.5. Removal, recovery repair and installation of a radiator of the cooling system
5.6. Replacement of the water pump
5.7. Removal and installation of the fan of the cooling system
5.8. Air ducts of distribution of the air given to salon
5.9. System of automatic air conditioning – a design and the principle of functioning
5.10. Structure of the refrigerator highway of the air conditioning system
5.11. The K/V compressor, - the general information and the principle of functioning
5.12. A receiver dehumidifier - the general information and service
5.13. Check of serviceability of functioning and service of systems of heating and air conditioning
5.14. Diagnostics of the air conditioning system
6. Feed and control systems
7. Systems of start and charge
8. Transmission line
9. Brake system
10. Suspension bracket and steering
11. Body
12. Electric equipment
 












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5.10. Structure of the refrigerator highway of the air conditioning system

The refrigerator path of air conditioning system has the standard organization.


Scheme of the organization of a refrigerator path of the air conditioning system

After an exit from the compressor coolant is banished via the condenser, comes to a receiver / dehumidifier, is pumped over via the evaporator and comes back in the compressor. Process of transition of coolant to gaseous state is controlled from the outside by means of the evaporator of the broad valve which is built in assembly.

Protection of system against excessive decrease / increase in pressure is carried out by means of the sensor switch which is built in in a receiver — as soon as pressure in system exceeds the limit of admissible range (up or down), the sensor switch is disconnected, stopping functioning of the compressor.

Besides, the safety valve which is carrying out emergency dumping of surplus of coolant into the atmosphere at excess by pressure in a path of value in 3.73 kPa is built in a back part of the compressor.


"on the page back
5.9. System of automatic air conditioning – a design and the principle of functioning
on the following page"
5.11. The K/V compressor, - the general information and the principle of functioning