Summer is the peak period for the use of air conditioners, while fully enjoying the cool temperature brought by air conditioners, some users report that their own or neighbors' air conditioners are noisy, and the noisy noise of air conditioners makes many residents troubled, affecting normal life and rest.
So, what is the reason for the high noise of the air conditioner outside unit, and how to solve the problem of high noise of the air conditioner outside unit? Let the super invincible universe No. 1 decoration scholar take you to solve it.
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First of all, we need to popularize a knowledge:
According to the mandatory national standard "Noise Limits for Household and Similar Electrical Appliances", since August 1, 2005, air conditioners have different requirements for noise values according to their number of horses: that is, the noise of the indoor unit of the air conditioner with a cooling capacity of less than 2000W (about 1 horse) should not be greater than 45 decibels, and the noise of the outdoor unit should not be greater than 55 decibels, and the noise of the indoor unit of the split air conditioner between 500W and 4500W (about 1 horsepower to 2 horses) should not be greater than 48 decibels, and the noise of the outdoor unit should not be greater than 58 decibels.
According to Xiaobian, in the "Noise Emission Standards for Social Living Environment" implemented in October 2008, it is clearly stipulated that hospital wards, residential bedrooms, hotel rooms and other rooms that are mainly resting and sleeping, and need to ensure quiet, the noise shall not exceed 30 decibels at night (22:00 to 6:00 the next day), and shall not exceed 40 decibels during the day (6:00 to 22:00). And this regulation is obviously far from the standard noise level of the outdoor unit of the air conditioner.
In this regard, an air conditioning industry insider told Xiaobian: In fact, major air conditioning manufacturers have been working hard to reduce noise, but in the air conditioning manufacturing industry, it is relatively easy to reduce the noise of the indoor unit of the air conditioner, and it is relatively difficult to reduce the noise of the outdoor unit. "Because the compressor and rotating blades of the air conditioner are installed outdoors, noise is unavoidable when the outdoor unit is running. ”
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So we have to find the real reason for the noise of the outdoor unit of the air conditioner:
1. The installation of the outdoor unit bracket is not horizontal
If the outdoor unit bracket of the air conditioner is not installed horizontally, or the fixing screws of the combination bracket are not fastened in place and deform, the bottom foot of the outdoor unit will be uneven. At this time, the bracket of the outer unit should be rearranged and adjusted to a horizontal state, or the fixing screws of the bracket should be tightened.
2. The force on the screw at the bottom of the outdoor unit is uneven
If the screws at the bottom of the outdoor unit are stressed unevenly, you need to loosen the fixing screws on the foot of the outdoor unit, use a wrench to tighten the foot screws, and at the same time tighten them evenly and forcefully, and do not tighten one of the screws in place first, which will lead to uneven fixing force.
3. The installation position of the outdoor unit is incorrect
Improper installation of the outdoor unit is also a major problem. First, we need to identify the wall structure. If it is precast concrete, and the indoor side is mostly an office space, bedroom, study, etc., which is relatively hollow, the indoor will produce a roundabout surround sound, and the noise will be very large. This kind of phenomenon caused by the architectural structure and the decorative effect in the house is an objective factor condition.
4. The outdoor unit compressor is noisy
If the three-phase compressor of the outdoor unit is reversed, the compressor inlet cable needs to be replaced to make it rotate forward. At the same time, it is necessary to check whether the working current and system pressure of the outdoor fan motor are within the normal range. If the noise is still high, the compressor needs to be replaced.
5. Poor assembly of outdoor fan motor or axial fan blade
If the flow blade of the outdoor unit is not well assembled, the axial flow blade of the outdoor unit should be removed for testing. If the noise is eliminated, the axial fan blades need to be replaced, otherwise, the outdoor fan motor should be replaced.
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5. The fixing screws of the outdoor casing are loose
If the fixing screws of the outdoor case are loose, the external unit will resonate with the bracket when it is running. At this time, check and tighten the internal parts of the outdoor unit and the enclosure fixing screws in place.
7. The outdoor unit is too dirty:
Sometimes excessive noise may be caused by the outdoor unit being too dirty, or there are foreign objects in the case that rub against the fan and cause noise. Just clean up the foreign object.
8. There is a problem with the operation of the fan:
It may also be that the fan rubs against the outer wall during operation and needs to adjust the distance between the fan and the outer wall in time, or the fan is stuck, add an appropriate amount of lubricating oil to the fan shaft of the air conditioner to ensure that the fan rotates smoothly.
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The above are some of the reasons for the noise summarized by the editor. However, there are many reasons for the noise of the outdoor unit of the air conditioner, and the identification is also quite complicated, which requires the maintenance personnel to patiently check and identify. Some specific cases still need to be inspected and tested before a conclusion can be reached.
If we encounter the problem of noisy outdoor units of air conditioners, we must not blindly repair them by ourselves, so as not to cause damage to the air conditioners. Professionals should be called in for on-site repairs.
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