Filling method of air conditioning refrigerant
2015/10/9 view:
Preparation before filling
1 refrigerant
First of all access to the vehicle use manual, determine the type of refrigerant used, the total amount of filling. HFC-134a, CFC-12 may not be mixed or misuse, otherwise it will cause damage to compressor, lubricating oil settling, the performance of the refrigeration system reduces the consequences of the.
2 lubricating oil
Different refrigerant with different oil:
A.HFC-134a: poly alkyl ethylene glycol (PAG) and polyester (POE) lubricating oil
B.CFC-12: mineral base oil
3 charging device
Use special recycling, recycling, charging device, the device shall comply with the relevant provisions.
4 before charging operation procedures
(1) remove the refrigeration system on the compressor repair inlet sealing cap, connecting hose:
Low pressure gauge hose (blue - black line) - air compressor suction port
High - pressure gauge hose (red - black line) - air compressor discharge port
Intermediate hose (yellow, white, black lines) - the device is imported, it is recycling, recycling, filling with hose.
(2) the thermocouple thermometer is fitted with a liquid pipe of the refrigeration system, and is close to the air conditioning pressure sensor as close as possible, so that the temperature of the liquid pipeline can be accurately determined.
(3) engine running (1000~1500rpm high idle mode) for 5 minutes, so that the refrigeration system to achieve the normal work of the pressure, temperature.
(4) the state control of the air conditioning: the front window open, the transmission - N/P file (air, parking brake), air circulation, all cold, blower, compressor, etc..
(5) if the vehicle is equipped with a rear air conditioning system, it shall be set for the whole cooling and blower speed.
(6) the discharge pressure of the refrigeration system of the liquid piping is quickly reached to the 1793KPa (which is of the same magnitude as the value of the vehicle) before the condenser. To keep the pressure constant, adjust the shielding area.
Two. Refrigerant charging
Auto air conditioning system of maintenance operations, about 80% of the normal supplementary filling refrigerant.
1 charging method
(1) high pressure side filling (Figure 4-5). When the vehicle refrigeration system to confirm no leakage and other failures, the environment temperature is not high, the engine can not run, use the filling machine or manifold test table set to fill. But the filling system must have a high pressure rebound safety valve to prevent the return of the refrigerant storage tank explosion.
(2) low pressure side charging
The storage tank is inverted, the refrigerant from the low pressure side of the injection refrigeration system. The utility model has the advantages of saving time and convenience, and the pressure in the tank is not changed much. But it is easy to produce "liquid hammer" phenomenon, the impact of the compressor caused damage.
(3) low pressure side filling machine filling machine
This method is commonly used, safe, reliable, charging time is longer. Heated by the charging device, and is operated by a trained professional.
(4) low pressure and high pressure on both sides simultaneously charging
The use of special recycling, recycling, charging device.
2 low pressure, high pressure on both sides of the procedure
A recovery, recycling, charging device for the filling process:
(1) setting the total filling amount of the vehicle refrigeration system (as per the vehicle use manual);
(2) recovery of all refrigerants in refrigeration systems;
(3) vacuum pumping;
(4) the use of a storage tank (for the refrigerant) is used for weighing the electronic said;
(5) the refrigerant in the storage tank is provided with a heating system, but the maximum shall not be higher than 52;
(6) open the charging valve, so that the high pressure liquid refrigerant from the storage tank to the high and low pressure on both sides of the flow, into the refrigeration system;
(7) to reach the set value (weight), automatically stop charging; but the refrigeration system has not reached the set value, a small part of the refrigerant is retained in the filling system piping, valves and other space, for which the following is not fully filled";
(8) "not fully charging":
A. removal of the high pressure side of the quick change joint;
B. starting engine, so that the automotive air conditioning refrigeration system;
C. residual refrigerant (low pressure side) is sucked into the refrigeration system, and the weight of the refrigerant is reached to the setting value. The vehicle production plant is usually given the value of the residual value, and the value of the pre added value is added. In this way, the refrigerant remaining in the charging device is pumped back into the storage tank in the next recovery operation, without adding "not fully charging".
Test the performance of the refrigeration system (see the performance of the 4.2.7 test system);
(9) removing the charging device, pay attention to the maintenance of the refrigeration system and seal cover;
3 low pressure side charging procedure (filling machine and manifold test table group)
(1) recovery of all refrigerants in refrigeration systems
(2) vacuum pumping
(3) the use of a storage tank (already available for refrigerants) - the electronic weighing apparatus used to set up the device;
(4) the refrigerant in the heat storage tank is provided with a heating system or a storage tank is placed in a hot pot, but the maximum shall not be higher than 52;
(5) open the suction valve and discharge valve;
(6) open the charging valve, so that the high pressure liquid refrigerant from the storage tank to the low pressure side of the flow into the refrigeration system;
(7) when the pressure in the storage tank is equal to that of the refrigeration system, the refrigerant flow ceases;
(8) close the intake valve and the discharge valve;
(9) measuring, recording the temperature of the discharge port pressure, liquid line;
(10) the control "filling in the table", determine the filling amount:
A. will measure the pressure, temperature, painted in the "filling and determination of the table" on the intersection if it is located in the upper left area, for the "filling problem" should be added to the refrigeration system refrigerant (0.057 kg per time);
B. if the intersection is located in the right area of the filling to determine the table, then the filling excess, from the refrigeration system to recover the refrigerant - each time 0.057 kg;
Filling method of air conditioning refrigerant
1 refrigerant
First of all access to the vehicle use manual, determine the type of refrigerant used, the total amount of filling. HFC-134a, CFC-12 may not be mixed or misuse, otherwise it will cause damage to compressor, lubricating oil settling, the performance of the refrigeration system reduces the consequences of the.
2 lubricating oil
Different refrigerant with different oil:
A.HFC-134a: poly alkyl ethylene glycol (PAG) and polyester (POE) lubricating oil
B.CFC-12: mineral base oil
3 charging device
Use special recycling, recycling, charging device, the device shall comply with the relevant provisions.
4 before charging operation procedures
(1) remove the refrigeration system on the compressor repair inlet sealing cap, connecting hose:
Low pressure gauge hose (blue - black line) - air compressor suction port
High - pressure gauge hose (red - black line) - air compressor discharge port
Intermediate hose (yellow, white, black lines) - the device is imported, it is recycling, recycling, filling with hose.
(2) the thermocouple thermometer is fitted with a liquid pipe of the refrigeration system, and is close to the air conditioning pressure sensor as close as possible, so that the temperature of the liquid pipeline can be accurately determined.
(3) engine running (1000~1500rpm high idle mode) for 5 minutes, so that the refrigeration system to achieve the normal work of the pressure, temperature.
(4) the state control of the air conditioning: the front window open, the transmission - N/P file (air, parking brake), air circulation, all cold, blower, compressor, etc..
(5) if the vehicle is equipped with a rear air conditioning system, it shall be set for the whole cooling and blower speed.
(6) the discharge pressure of the refrigeration system of the liquid piping is quickly reached to the 1793KPa (which is of the same magnitude as the value of the vehicle) before the condenser. To keep the pressure constant, adjust the shielding area.
Two. Refrigerant charging
Auto air conditioning system of maintenance operations, about 80% of the normal supplementary filling refrigerant.
1 charging method
(1) high pressure side filling (Figure 4-5). When the vehicle refrigeration system to confirm no leakage and other failures, the environment temperature is not high, the engine can not run, use the filling machine or manifold test table set to fill. But the filling system must have a high pressure rebound safety valve to prevent the return of the refrigerant storage tank explosion.
(2) low pressure side charging
The storage tank is inverted, the refrigerant from the low pressure side of the injection refrigeration system. The utility model has the advantages of saving time and convenience, and the pressure in the tank is not changed much. But it is easy to produce "liquid hammer" phenomenon, the impact of the compressor caused damage.
(3) low pressure side filling machine filling machine
This method is commonly used, safe, reliable, charging time is longer. Heated by the charging device, and is operated by a trained professional.
(4) low pressure and high pressure on both sides simultaneously charging
The use of special recycling, recycling, charging device.
2 low pressure, high pressure on both sides of the procedure
A recovery, recycling, charging device for the filling process:
(1) setting the total filling amount of the vehicle refrigeration system (as per the vehicle use manual);
(2) recovery of all refrigerants in refrigeration systems;
(3) vacuum pumping;
(4) the use of a storage tank (for the refrigerant) is used for weighing the electronic said;
(5) the refrigerant in the storage tank is provided with a heating system, but the maximum shall not be higher than 52;
(6) open the charging valve, so that the high pressure liquid refrigerant from the storage tank to the high and low pressure on both sides of the flow, into the refrigeration system;
(7) to reach the set value (weight), automatically stop charging; but the refrigeration system has not reached the set value, a small part of the refrigerant is retained in the filling system piping, valves and other space, for which the following is not fully filled";
(8) "not fully charging":
A. removal of the high pressure side of the quick change joint;
B. starting engine, so that the automotive air conditioning refrigeration system;
C. residual refrigerant (low pressure side) is sucked into the refrigeration system, and the weight of the refrigerant is reached to the setting value. The vehicle production plant is usually given the value of the residual value, and the value of the pre added value is added. In this way, the refrigerant remaining in the charging device is pumped back into the storage tank in the next recovery operation, without adding "not fully charging".
Test the performance of the refrigeration system (see the performance of the 4.2.7 test system);
(9) removing the charging device, pay attention to the maintenance of the refrigeration system and seal cover;
3 low pressure side charging procedure (filling machine and manifold test table group)
(1) recovery of all refrigerants in refrigeration systems
(2) vacuum pumping
(3) the use of a storage tank (already available for refrigerants) - the electronic weighing apparatus used to set up the device;
(4) the refrigerant in the heat storage tank is provided with a heating system or a storage tank is placed in a hot pot, but the maximum shall not be higher than 52;
(5) open the suction valve and discharge valve;
(6) open the charging valve, so that the high pressure liquid refrigerant from the storage tank to the low pressure side of the flow into the refrigeration system;
(7) when the pressure in the storage tank is equal to that of the refrigeration system, the refrigerant flow ceases;
(8) close the intake valve and the discharge valve;
(9) measuring, recording the temperature of the discharge port pressure, liquid line;
(10) the control "filling in the table", determine the filling amount:
A. will measure the pressure, temperature, painted in the "filling and determination of the table" on the intersection if it is located in the upper left area, for the "filling problem" should be added to the refrigeration system refrigerant (0.057 kg per time);
B. if the intersection is located in the right area of the filling to determine the table, then the filling excess, from the refrigeration system to recover the refrigerant - each time 0.057 kg;
Filling method of air conditioning refrigerant
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