What is the reason for the sound of the indoor unit of the air conditioner?

Reason: The filter screen is too dirty, and the air inlet is blocked, resulting in a noisy air conditioner inside; The inner cover is not tightly covered, resulting in vibration and sound when the air conditioner is working; The sudden change in temperature causes the plastic shell and the internal plastic parts to expand and contract, resulting in sound. Workaround:

Wash the filter; Close the inner lid; No, it's normal. When a certain expansion coefficient is reached, there will be no sound. Air conditioning:

Remove debris from the vents to ensure proper ventilation. Observe whether the outdoor rack is loose, and clean the outdoor ventilation grille for foreign objects. At the same time, keep the vents open.

Clean the surfaces of indoor and outdoor heat exchangers to improve the efficiency of heat exchangers. When cleaning the indoor heat exchanger, the panel should be carefully removed, scrubbed with a soft rag, and gently scrubbed with a small brush to remove dust and harmful deposits that can multiply germs. Remove dust from the filter.

When cleaning the filter, cut off the power supply first, and then open the air intake grille; Remove the filter and clean it with water or a vacuum cleaner. The water temperature should not exceed 40 degrees. Wash with a hot, damp cloth or mild detergent, then wipe with a dry cloth.

At the same time, the filter should not be cleaned with pesticides or other chemical cleaners.

Reason: If it is the sound of the buzzer, it means that the air conditioner may be faulty; If it is the sound of refrigerant flowing, it may be caused by the air conditioner being overcharged and unable to evaporate completely; It's also possible that something is stuck on the fan blades or evaporator, causing an abnormal noise. Workaround:

Air conditioner failures need to be repaired by contacting professionals; Just wait for the air conditioner to evaporate; If you can take out the things on the fan blades or evaporator, take them out yourself, if not, please find a maintenance person. Air conditioning maintenance: remove debris from the vent to ensure normal ventilation.

Observe whether the outdoor rack is loose, and clean the outdoor ventilation grille for foreign objects. At the same time, keep the vents unobstructed. Indoor and outdoor heat exchanger surface cleaning to improve the efficiency of the heat exchanger.

When cleaning the indoor heat exchanger, you should carefully remove the panel, scrub it with a soft rag, and use a small brush to gently scrub the heat exchanger of the internal machine, so as to achieve the purpose of removing dust and harmful accumulation of multiplying germs. Wash the dirt on the filter. When cleaning the filter, first cut off the power supply, and then open the air inlet grille; Take out the filter, wash the filter with water or a vacuum cleaner, the water temperature should not exceed 40 degrees, wash it with a hot damp cloth or neutral detergent, and then wipe it with a dry cloth, and do not wash the filter with insecticides or other chemical detergents.

There are many reasons for abnormal sounds in the air conditioner, so let's briefly analyze them.

The first reason is that the screws in the air conditioner are loose, which causes the connection between the parts to be not tight, resulting in abnormal sounds. Since there are a lot of plastic products inside the air conditioner, these parts may become fragile due to aging, or they may be deformed due to thermal expansion and contraction. These situations will cause the screws of the air conditioner unit to loosen, resulting in abnormal sound in the air conditioner.

The solution is also very simple, just tighten the screws.

The second reason is that the fan inside the air conditioner is short of oil, which leads to abnormal sounds. Although many air conditioners now have self-lubricating functions in the fans, it is not excluded that the wear and tear will be aggravated due to dust and impurities mixed into them, resulting in a lack of oil. After all, the fan needs to rotate frequently, and there will naturally be abnormal noises when there is a lack of oil.

The solution is not complicated, just add some lubricating oil to the fan or replace the fan inside.

The third reason is that due to the damage of the air conditioner's filter, beetles fly into the air conditioner, which causes abnormal noise. In fact, the filter of the air conditioner is very thin, and it is also easy to be attacked by small insects. When a small insect bites through the filter and crawls into the air conditioner, it may be sucked into the fan.

When the fan blades rotate, beetles will be hit, resulting in abnormal conditions. The solution is to disassemble the internal unit of the air conditioner, clean up the beetle and replace it with a new filter.

The fourth reason is that some parts of the air conditioner are damaged due to aging, which makes abnormal sounds in the air conditioner. Since many air conditioners run all year round, it will accelerate the aging and wear of many parts. When some parts cannot work normally due to aging and wear, it is reasonable to have abnormal noise.

Therefore, at this time, those parts should be replaced in time to solve this problem.

The abnormal noise of the air conditioner may be caused by the unconstant airflow organization, hitting each other, or because the screws that fix the gland of the motor are loose.

Solution: 1. Clean the filter screen regularly (should be cleaned once every half a month), if the filter screen is too dirty, the air inlet will not only make the internal machine noisy, vibrate, the wind sound is low, and the wind speed can not be raised, and when the outdoor ambient temperature is not too low, it will make the indoor unit evaporator overheating protection and frequent standby, generally about 10 minutes;

2. Check whether the inner cover is tightly covered, sometimes the inner cover is not tightly covered after cleaning the filter screen or after cleaning, resulting in the vibration and sound of the air conditioner when working;

3. In order to make the room heat up (cool down) quickly when the air conditioner is just turned on, use the high-efficiency key, the indoor unit runs at high speed, and the noise may be a little louder.

4. When the air conditioner is running or after the shutdown, due to the sudden change in temperature, it may lead to the thermal expansion and contraction of the plastic shell and the internal plastic parts, and thus make a "click" sound, which is a normal situation.

5. During the operation of the air conditioner, it will emit sounds similar to running water, gas (the sound of the reversing valve reversing instantaneously when the machine defrosts in winter), and the sound of boiling the pot (the sound of freon entering the indoor evaporator), which can be interpreted as the sound of refrigerant flowing in the machine and the sound of freon reflux in the machine, which are normal sounds and not noise.

6. If the air conditioner is noisy, after eliminating the above reasons, the fault is still there, you should find a professional maintenance personnel for maintenance.

The main reason for the sound of the air conditioner is due to the following reasons.

1. Fan. Zhi turns the sound.

DAO fan turning sound packet.

Specialized in mechanical components.

It is the sound of contact, and there is also the sound of air flowing. The normal airflow sound will not be too disgusting, but if the structural design is not reasonable, and the distance between the air duct and the socket tongue is not well grasped, local vortex may occur, and the sound will increase, affecting the sound quality of the air conditioner.

2. The sound of refrigerant inside the evaporator.

There will be refrigerant flow in the pipeline of the air conditioner, if it is simply a gaseous refrigerant, the sound will be much smaller, if there is a gas-liquid two-phase refrigerator flowing in the internal evaporator at the same time, the sound will be a little unpleasant, and sometimes there will be a "whoosh" sound.

3. In addition, when heating in winter, due to thermal expansion and cold contraction, the internal stress release of plastic parts will also squeak.

4. Miscellaneous. The air conditioner parts are damaged, and some parts are in abnormal contact and there will be noise.

Do you hear the noise of the indoor unit, the sound of air flow, the sound of friction or the sound of impact? Airflow sound: It is the start of the air conditioner special machine, and the compressor works.

When the freon in the air conditioning line starts to circulate, there will be a small sound of airflow. If the airflow sound continues, it may be that the air conditioning pipe is bent and deflated during installation, forming a flow interception, resulting in the flow of freon is not smooth, and the airflow sound is generated. Friction sound:

When the fan or hair dryer of the internal unit rotates, the impact sound of the plastic shell of the internal unit is rubbed: when the indoor unit of the air conditioner is working, you touch the inner shell with your hand to see if it is shaking, if it shakes again, it means that the internal unit is not installed securely, and it may also be a problem with the internal fan motor.

1. The reason for the abnormal noise of the indoor unit of the air conditioner.

1. Whether the filter is cleaned regularly.

If the filter screen is too dirty, the air inlet will be blocked, which will cause the internal machine to be noisy, vibrate, and the wind speed can not be raised, and when the outdoor ambient temperature is not too low, it will make the indoor unit evaporator overheating protection and frequent standby, generally about 10 minutes apart.

2. Whether the inner cover is tightly covered.

Sometimes users do not cover the inner unit tightly after cleaning the filter or after cleaning, resulting in the vibration and sound of the air conditioner when it is working. When the air conditioner is just turned on, in order to cool down the room quickly, use the high-efficiency key, the indoor unit runs at high speed, the noise may be a little louder, and after working for a period of time, the air conditioner turns into normal operation, and the sound is naturally smaller, generally speaking, the high-efficiency function will stop automatically after running for 15 minutes.

3. The reason for the sudden change in temperature.

When the air conditioner is running or after the shutdown, due to the sudden change in temperature, it may lead to the thermal expansion and contraction of the plastic shell and the internal plastic parts, and therefore make a clicking sound, which is a normal situation. When the machine stops running, it will make a rattle sound due to the temperature difference, which is likely to happen to all air conditioners, so you don't have to worry.

1. After cleaning the air conditioner, the inner cover is not closed properly, resulting in abnormal noise during the operation of the air conditioner, and the air conditioner should be turned off.

2. The air conditioner has just been turned on, and during operation, the internal equipment will make noise, but it will stop after a few minutes. This is normal, mainly because the sudden change in temperature can cause the thermal expansion and contraction of the enclosure and internal components, resulting in a "click" sound.

3. The abnormal noise of the indoor unit of the air conditioner may be caused by the loosening of some parts of the indoor unit of the air conditioner.

The solution to the abnormal noise in the air conditioner

1. Clean the filter regularly.

2. Check whether the inner cover of the machine is closed. Sometimes the indoor unit is not properly turned off after cleaning the filter or hygienic cleaning, causing the air conditioner to vibrate and make a sound.

3. When the air conditioner is turned on, the room should be heated (cooled) quickly, and the indoor unit should be run at high speed with the high-efficiency key, and the noise may be louder. After a while, the air conditioner went into normal operation, and the sound naturally became quieter.

The reason why the indoor unit of the air conditioner rattles at night may be:

1. The dirty filter screen of the internal machine causes the evaporator to freeze, and then the fan blade hits the ice;

2. After 1-2 hours of refrigeration, the normal plastic will have thermal expansion and cold contraction, and the plastic shell tightens each other to make a sound;

3. The fan tube barrel of the internal machine has broken blades, resulting in unbalanced rotation;

4. The fixation of the fan is loose;

5. During installation, the inner machine is not hung solid or the wall is uneven.

Depending on the specific reason, ask a professional to come to your home to repair.

A slight clicking sound is normal :

However, if it is said that it appears by accident or is suddenly discovered, it should be that some screws are loose inside, or the internal machine is not clean, and some debris collides and causes noise when the internal machine is running.

You can open the front cover of the inner unit in the case of power failure, you can first see if the fixed fan blade is loose, check whether the inside is clean, whether there is obvious dust, and then check the tightness of some screws. If it is not obvious, you can turn on the internal machine to see if there is any sound. If not, it means that the cover plate is not installed compactly, and if it still exists, pay attention to where it came from.

If it is sent by the internal motor, this is mostly a normal phenomenon of fan aging, but please pay attention to safety when operating.

As long as the function is normal, you can use it boldly, and there will be a sound of degassing when heating, that is, the outdoor unit begins to defrost, and the liquid in the air conditioner changes the flow direction, at this time, the indoor unit belongs to refrigeration, but it does not blow the wind, and then the indoor unit begins to heat and blow, so that the indoor unit has a big difference between cold and heat, and the rattling sound comes out.

The above content reference: Encyclopedia - Air Conditioning Failure.

The sound of the air conditioner may be due to the fact that the filter is not cleaned regularly, the inner cover is not tightly covered, and the temperature changes suddenly.

1. The filter is not cleaned regularly.

If the filter screen is too dirty, the air intake will not only make the internal unit noisy, but also when the outdoor ambient temperature is not too low, it will make the indoor unit evaporator overheat protection and frequent standby, generally about 10 minutes.

2. Whether the inner cover is tightly covered.

Sometimes the user does not cover the inner unit tightly after cleaning the filter screen or after cleaning, resulting in the vibration sound of the air conditioner when it is working, and the air conditioner is transferred to normal operation, the sound is naturally smaller, and generally speaking, the high-efficiency function will automatically stop after 15 minutes of operation.

3. Sudden change in temperature.

Due to the sudden change in temperature, the thermal expansion and contraction of the plastic shell and the internal plastic parts are caused by the "click" sound, which is a normal situation, and when a certain expansion coefficient is reached, there will be no clicker sound.

Common faults of air conditioners

1. Refrigeration system: observe whether there are cracks, damage, frost and condensation in each pipeline of the refrigeration system; Whether there is any collision and friction between the refrigeration pipelines, pipelines and shells, especially the welding of the refrigerant pipelines, whether there is leakage at the joint connection, and there will be oil stains at all leaks.

2. Electrical system: observe whether the fuse of the electrical system is fused, whether the insulation of the electrical wire is intact and undamaged, whether the circuit board is broken, whether the connection is loose, etc. In particular, whether the electrical connection is in good contact, the wiring screws and plug-in parts are easy to loosen and cause poor contact.

3. Ventilation system: observe whether the air filter, heat exchanger coil and fins accumulate too much dust; whether the air inlet and outlet are unblocked; whether the fan and fan blades are operating normally; whether the wind is normal, etc.