The pipes of the outdoor unit of the air conditioner are frosted, and the two pipes of the outdoor u

The frost of the thick pipe of the outdoor unit is caused by the fact that the cold energy of the evaporator cannot be completely dissipated during the refrigeration process, and the temperature of the evaporator is too low.

If the air conditioner has been in use for several years, you can rule out installation issues.

The common causes of frosting in the rough pipe of the outdoor unit are: there is dust in the gap of the evaporator, and the cooling capacity is not completely dispersed: the filter screen of the indoor unit is dirty, and the frost of the thick pipe is frosted: there is dust in the blades of the cross-flow fan, and the air output is small; The speed of the fan is slow, etc.

If the user sets the wind speed to low, the air volume becomes smaller, but the compressor does not operate at a reduced frequency, and the evaporator temperature gradually decreases, eventually causing frost in the thick tubes.

Try not to run the air conditioner with "low wind" when using it at night, so that the air conditioner will no longer have frost on the thick pipes. This machine is an early air conditioner, and there is no "low wind frequency limit protection" in the control program, and there is "low wind frequency limit protection" in the control program of the air conditioner produced in the later period.

If the liquid pipe valve (thin pipe valve) is frosty, it means that the fluorine deficiency is serious; Only the tracheal valve (coarse pipe valve) is frosted, indicating a slight lack of fluoride or too low ambient temperature; Both valves are frosted, indicating that the system has secondary throttling.

The frosting of the liquid pipe may be due to the lack of refrigeration; Frosting of the trachea may be due to too much refrigeration; Of course, other parameters such as equilibrium pressure, current and other parameters should also be used as a reference.

There are a lot of refrigerants, which have no effect on the refrigeration effect. You can wrap it up.

Frost on both pipes of the air conditioner may be one of the following reasons:

1.There was a failure in the air conditioning system, which led to the poor refrigeration effect of the lead car, which caused frost on the condenser pipe and evaporation pipe.

2.The lack of refrigerant inside the air conditioning system leads to poor refrigeration and frost formation in both the condenser and evaporation tubes.

3.The filter or evaporator inside the air conditioning system is clogged, resulting in poor air circulation, causing frost in both the condenser and evaporation tubes.

4.The fan inside the air conditioning system failed, resulting in poor air circulation, which caused frost in both the condenser and evaporation pipes.

If both pipes of the air conditioner are frosty, it is recommended to contact a professional air conditioner maintenance personnel for inspection and maintenance in time. Acacia number.

Frosting of copper pipes in air conditioners can be caused by the following reasons:

1.The cooling capacity of the air conditioner is too large, resulting in the condenser temperature being too low and the surface of the copper pipe being frosted.

2.The cooling capacity of the air conditioner is too small, resulting in the indoor temperature cannot be reduced, the air conditioner runs for a long time, and the surface of the copper pipe is frosted.

3.The air conditioner filter is not cleaned, resulting in poor air flow and frost on the surface of the copper pipes.

4.Insufficient or leakage of refrigerant in the air conditioner leads to a decrease in the refrigeration effect and frost on the surface of the copper pipe.

5.The improper placement of the air conditioner outside unit leads to the high ambient temperature and frost on the surface of the copper pipe.

Workaround:1Adjust the cooling capacity of the air conditioner so that it is suitable for the current ambient temperature.

2.Clean the air conditioner filter regularly to ensure smooth air flow.

3.Check the amount of refrigerant in the air conditioner, and add or repair it in time if there is any shortage or leakage.

4.Place the air conditioner in a well-ventilated location with a suitable temperature for cracks.

5.If the above methods do not work, it is recommended to contact a professional air conditioner maintenance personnel for maintenance.

The reason may be that the evaporator is polluted by the trembling car and cannot function normally, and the low temperature phenomenon of the evaporator will occur, which can be solved by thoroughly cleaning the evaporator; The reason may be that the thermostat loses the ability to control the temperature and swim, resulting in the frosting phenomenon of the small tube, and the optimal solution is to replace the thermostat with a new one to solve the problem of failure; The reason may be that the fan blade is attached to dirt, which increases the operating load of the fan blade, affects the air supply effect, and indirectly reduces the efficiency of the evaporator, which can be solved by cleaning the fan blade. The reason may be that the performance of the compressor is out of order, and the compressor can be troubled and repaired, and if the bad situation cannot be improved, the problem can only be solved by replacing the compressor with a new compressor. In addition, frost formation is indispensable for refrigerant anomalies.

If the refrigerant filling amount is too small, the evaporation pressure will be reduced accordingly, and the phenomenon of obvious freezing in the front section of the evaporator will occur, and the problem can be solved by supplementing the refrigerant. It should also be noted that the shortage of refrigerant is usually caused by pipeline leakage, and the inspection of pipelines is also used as a solution to the problem. The amount of refrigerant should also pay attention to "too much", not the more filling in the pipeline, the better, the amount of the hole pin will also cause high-pressure protection, and the rear end of the evaporator freezes more, which can be solved by removing the excess part.

The icing of the small tube of the external unit affects the refrigeration effect of the air conditioner, so it is a good policy to find out the problem and solve it accurately.

The causes of frosting on the pipes of the air conditioner are: normal frosting and local blockage of the refrigeration system.

1. Normal frosting: When the air conditioner starts to run, due to the low condensation temperature and condensation pressure, the liquid supply of the capillary tube is lower than the normal value, which reduces the evaporation pressure, which causes frosting in the low-pressure liquid supply pipe. However, this frosting to melting is only a short process, generally frosting begins after the compressor is running, the whole frosting and melting process is over, and the air conditioner enters normal operation.

Kiga. <>2. Local blockage of the refrigeration system: the blockage point is generally more common at the filter outlet or capillary inlet. Due to the throttling effect caused by local blockage in the system, the pressure after throttling is lower than the normal value of the air conditioner, causing frosting in the liquid supply pipe.

Maintenance tips for air conditioners

1. When the air conditioner is running at high load, due to the dirt attached to the machine room and the filter screen, it will affect the air volume and cooling and heating effect of the air conditioner, and also affect the life of the air conditioner, and long-term maintenance will easily lead to the failure of the air conditioner. During the cleaning process, the filter in the air conditioner needs to be removed and cleaned to completely remove the dirt, quickly discharge the air, and maintain healthy air quality.

2. While using the air conditioner, we should always pay attention to the opening and closing of the doors and windows, close them in time, and maintain the cold storage capacity of the room, so as to reduce the working intensity of the air conditioner, reduce the consumption of energy, and also prolong the life of the air conditioner. When the air conditioner is running at a low temperature, we should also pay attention to the direction of the air conditioner to avoid blowing directly into the human body for a long time.

3. Long-term use of air conditioning, dust and oil stains in the computer room will form a film, and the indoor humidity is too large, which is prone to unclean phenomena such as yellow scale and black spots.

Summary. Three reasons why aircon big pipes are frosty.

The first type: just moved over the machine or a new machine, the thick tube is flat.

This phenomenon is that the evaporation device is not cold, but the thick pipe valve is abnormally cold. This is the second savings after the thick tube is flattened. The reason why the evaporation unit is not cold is that the liquid freon is retained in the evaporation unit; The pressure is high and the transpiration is high. The temperature is also very high.

Processing method: check whether the pipeline is flat, welding correction.

Second: lack of freon.

One phenomenon is the presence of branching capillaries in the chamber and in the machine. When the amount of fluorine deficiency is 3 or 4 kg, the thick pipe valve and the coarse pipe of the outdoor unit are frosted. This is a special case.

However, in conditions lacking fluoride, it can frost.

Treatment: Add an appropriate amount of freon.

The third type: poor refrigeration effect.

For example, the filter is too dirty, the top surface of the transpiration is too dirty, there is not much wind, there is a problem with the motor system, the speed is too slow, and the room temperature is too low.

Think that this phenomenon is relatively easy to find; In other words, the transpiration of the indoor unit will also frost evenly.

He is different from fluoride-deficient frosting; Fluoride deficiency frost is zebra frost or frost on the front of the pipe and the back is at room temperature.

Solution: Check the filter, evaporator, motor system, etc., and deal with the problematic place in the **.

The large pipe of the air conditioner is frosty.

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The first of the three reasons for frosting in the large pipe of the air conditioner: the thick pipe is flat just after moving the machine or a new machine, this phenomenon is that the evaporation device is not cold, but the thick pipe valve is abnormally cold. This is the second savings after the thick tube is flattened.

The reason why the evaporation unit is not cold is that the liquid freon is retained in the evaporation unit; The pressure is high and the transpiration is high. The temperature is also very highProcessing method: check whether the pipe is flat, welding correction second:

Freon deficiency is the presence of branching capillaries in chambers and machines. When the amount of fluorine deficiency is 3 or 4 kg, the thick pipe valve and the coarse pipe of the outdoor unit are frosted. This is a special case.

However, in conditions lacking fluoride, it can frost. Treatment: Add an appropriate amount of freon to the third kind:

Poor refrigeration, for example, the filter is too dirty, the top surface of the transpiration is too dirty, there is not much wind, the motor system is faulty, the speed is too slow, and the room temperature is too low. Think that this phenomenon is relatively easy to find; In other words, the transpiration of the indoor unit will also frost evenly. He is different from fluoride-deficient frosting; Fluoride deficiency frosting is a treatment method of zebra frost or frosting on the front of the pipe and room temperature at the back

Inspect filters, evaporators, motor systems, etc., where there is a problem with the ** treatment.