How to add refrigeration oil for household air conditioners
With the arrival of high temperatures in summer, the frequency of use of household air conditioners has increased significantly, and the maintenance of air conditioners has also become the focus of users. Refrigeration oil is an important part of the air conditioning refrigeration system, and its addition and maintenance are directly related to the cooling effect and service life of the air conditioner. This article will introduce in detail the method of adding refrigeration oil for household air conditioners, and attach relevant data for reference.
1. The function of refrigeration oil

Refrigeration oil mainly plays the role of lubrication, sealing and cooling in air conditioning and refrigeration systems. It reduces friction in the internal parts of the compressor, extending equipment life while ensuring efficient circulation of refrigerant through the system.
2. Timing of adding refrigeration oil
Normally, the refrigeration oil of household air conditioners does not need to be added frequently, but it may need to be replenished or replaced under the following circumstances:
| situation | Description |
|---|---|
| Decreased cooling effect of air conditioner | It may be that insufficient refrigeration oil causes poor lubrication of the compressor |
| Air conditioner operation noise increases | The compressor produces abnormal noise due to lack of oil |
| After air conditioning repair | Refrigeration oil may be lost during maintenance |
3. Steps for adding refrigeration oil
1.Preparation
Make sure the air conditioner is powered off and prepare a suitable type of refrigeration oil (common household air conditioner refrigeration oil models are R22 or R410A special oil).
2.Position the filling port
Locate the refrigeration oil filler port on the compressor, usually located on the side or bottom of the compressor.
3.Clean the filler port
Use a clean cloth to clean around the filler port to prevent impurities from entering the system.
4.Connect filling tool
Connect the refrigeration oil filler to the filling port, making sure the connection is tight.
5.Add refrigeration oil
Slowly add refrigeration oil and pay attention to the oil level indicator (if any). Generally, the refrigeration oil filling amount for household air conditioners is:
| Number of air conditioners | Refrigeration oil filling volume (ml) |
|---|---|
| 1 horse | 350-400 |
| 1.5 horses | 450-500 |
| 2 horses | 550-600 |
| 3 horses | 700-800 |
6.Check seal
After filling is completed, make sure the filling port is well sealed to avoid refrigerant leakage.
7.Power on test
Reconnect the power supply, turn on the air conditioner, and observe whether the cooling effect and operating noise return to normal.
4. Precautions
1. Special refrigeration oil that matches the air conditioner refrigerant must be used. Different types of refrigeration oil cannot be mixed.
2. The filling amount must be accurate. Too much or too little will affect the performance of the air conditioner.
3. If you are not sure about the operation, it is recommended to contact professional maintenance personnel.
4. Regular maintenance of the air conditioner can extend the service life of the refrigeration oil. It is generally recommended to perform professional maintenance every 2-3 years.
5. Frequently Asked Questions
| question | Answer |
|---|---|
| What happens if you add too much refrigeration oil? | Will lead to a decrease in refrigeration efficiency and an increase in compressor load |
| Does refrigeration oil need to be replaced regularly? | Normally not required unless the oil quality deteriorates |
| How to judge whether the refrigeration oil has deteriorated? | Darkening in color, impurities or odor |
| Are different brands of air conditioning refrigeration oil compatible? | Not universal, must use specified model |
6. Recent hot topics
According to the search data of the entire network in the past 10 days, the topic of air conditioning maintenance has increased significantly. Among them, issues such as "poor cooling effect of air conditioners" and "loud air conditioner noise" have become the content that users are most concerned about. Experts suggest that performing air conditioning maintenance before the onset of hot weather can avoid malfunctions during peak usage periods.
Through the above detailed steps and precautions, I believe you will have a clearer understanding of adding refrigeration oil to household air conditioners. Proper maintenance can not only improve the performance of your air conditioner, but also extend its service life, giving you a more comfortable summer experience.
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