What is the method of filling refrigerant for car air conditioners?

Cars are an indispensable means of transportation for people to travel. On the one hand, they are more convenient, and on the other hand, they feel comfortable when traveling. Then summer is here, and the most common one used is air conditioning. If the refrigerant is not enough, doesn’t it mean that you can’t get the desired effect? u200bu200bWhat I want to introduce to you today is what is the method of refilling the car air conditioner with refrigerant? Let's take a look. Car air conditioner filling refrigerant: Step 1. Turn on the air conditioner to refrigerate and then add cry from the low pressure. When it is added to 0.35-0.55Mpa, then observe the cooling effect of the air conditioner. If possible, the measured high pressure cannot exceed 2.2Mpa. 2. Add refrigerant R134a from the place where the fluorine is added when the air conditioner is disabled. It is appropriate when the system pressure reaches 0.8-0.9Mpa 3. Let the air conditioner run for 30 minutes to do a careful inspection. The pressure is 0.35-0.55Mpa when measuring the low pressure. If it is too high, increase it, if it is too small, increase it. The high pressure should not exceed 2.2Mpa. If the sound is too loud and dull, it may be due to the addition of fluorine. If the sound is too low, the amount is not enough. Measure the temperature. The suction pipe is cool with condensation. The exhaust pipe temperature is about 80 degrees. The condenser temperature is about 55 degrees. The compressor suction pipe is cold with dew. The exhaust pipe is very hot. The temperature of the evaporator is about 15 degrees lower than the ambient temperature. . Measure the working current, the total current is close to the rated current. If the current is too large, increase it. If the current is too small, increase it too little. This requires the system and the circuit to be tested under normal conditions, because the working current of the compressor has a lot to do with the suction pressure of the compressor. The suction pressure is high and the current is high. The suction pressure and the bottom current are small. If the system is blocked, then the compressor will work. The operating current will also be low and the sound of the compressor will be abnormal. Car air conditioner filling refrigerant: the correct way to check the filling after adding it, be sure to add a little bit slowly and let the air conditioner run for about 10 minutes, and then measure the pressure and current. If it is inevitable, then add it in batches at the current pressure and current. As a standard, it may have been increased. When fluoride is added in winter, the four-way valve coil can be disconnected, or the indoor temperature sensor can be artificially brought to a temperature that can be cooled. Sometimes the air conditioner can also be operated in dehumidification mode. It does not require a high temperature. Try the air blown on the body after a period of time when the air conditioner is turned on for a period of time. It feels very cold and can quickly reach the set temperature. It is normal to work for a while and stop for a while. Otherwise, R134a may be required. Second, use a thermometer to measure the temperature difference between the inlet and outlet of the indoor unit above 8°C. The larger the normal temperature difference, the better the working condition of the air conditioner, which can reach about 15°C. If the difference is less than 8°C, R134a refrigerant may be required. Third, when you open the indoor unit panel ten minutes after starting up, you should see that the copper tube of the evaporator is covered with aluminum fins for heat exchange and the parts are evenly covered with condensed water. This is when the normal air humidity is high, and vice versa. If half and half do not, there may be a lack of refrigerant. Such as partial frost or ice formation is also abnormal. Refrigerant filling in automobile air conditioners: adverse consequences of not discharging air 1. The filling amount of refrigerant is insufficient, because the presence of air naturally takes up a part of the space, and filling directly without drawing air may be in the system when the filling of the refrigerant is not completed. If the pressure is too high, the remaining refrigerant can no longer be added to the air conditioner. 2. Excess air remaining in the system will reduce the power of the air conditioner and the cooling effect. Because part of the compressor compression is air that has no cooling effect, this causes the engine load to increase. Therefore, be sure to perform a vacuum operation before filling the refrigerant. This is the end of today’s introduction of the editor. The above is the method of filling refrigerant in car air conditioners introduced by the editor. I hope that the introduction of the editor can help you. Then you should pay more attention to car maintenance. It’s more to maintain your car regularly, and you can also extend the use of the car. Let’s take care of the car together.

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