What are the consequences of replacing a large compressor in a refrigerator?

The consequence is that the cable current cannot withstand it, and the cable is burned, and the main switch is tripped or burned out, and it cannot be well refrigerated.

1. The cable current cannot withstand it, and the power of the large compressor should be large. It turns out that the cables of the compressor are relatively thin, and replacing a large compressor is like a small horse-drawn cart.

2. When the cable is used for a long time, it may be burned, and if it is not processed in time, the cable will be burned, and the serious case will lead to disaster.

3. If the main switch trips or burns the switch, the whole replacement effect is meaningless, and finally the machine needs to be disassembled and replaced with a suitable compressor, which affects the refrigeration effect.

The big ones are not very many (around 20%), and there is no problem.

But if it is much larger, 2 times larger, then the following consequences will occur.

1: The cable current cannot withstand it, and the cable is burned.

2: The contactor can't bear it and burns it out.

3: The main switch trips or burns out.

4: Can't be well refrigerated.

The compressor is regarded as the heart of the refrigeration system, and the term that best describes the characteristics of the compressor is called "steam pump". The actual responsibility of the compressor is to increase the pressure and increase the suction pressure state to the discharge pressure state.

Try to change the motor with the same power as the original compressor, and increase the length of the capillary tube if it exceeds 10% of the power of the original press! There are many factors that affect the refrigeration speed (compressor power, condenser heat dissipation area, capillary length, evaporation area, amount of refrigerant, refrigerant type, and volume to be cooled, etc., ......).）

The refrigerator compressor is broken and worth replacement.

1. Judging from the damage degree of the components. If the entire appearance of the refrigerator is okay, and the copper pipes in the refrigerator have not been repaired, that is, they have not been recoiled, then it is still worth repairing.

2. Judging from an economic point of view. How much does it cost to repair the compressor and the new compressor, and even evaluate how much it costs to buy a new refrigerator of the same type, and finally confirm that it is repair, replacement of accessories, and replacement of refrigerator.

3. Judging from the perspective of after-sales service. Whether it is within the warranty period, whether it is free replacement during the warranty period and a series of factors are considered.

How the refrigerator compressor works

At present, the compressors of household refrigerators and air conditioners are all volumetric type, which can be divided into reciprocating type and rotary type. The rotary type uses a rotating shaft crankshaft mechanism. According to the application range, it can be divided into low back pressure type, medium back pressure type and high back pressure type.

Low back pressure type ( evaporation temperature -35 -15 is generally used in household refrigerators, food freezers, etc.

Medium back pressure type ( evaporation temperature -20 0 is generally used in cold drink cabinets, milk refrigerators, etc. High back pressure type ( evaporation temperature -5 15 is generally used in room air conditioners, dehumidifiers, heat pumps, etc. Reciprocating compressors use pistons, cranks, and connecting rod mechanisms or pistons, cranks, and slide pipe mechanisms.

Refrigerator compressor composition: compressor, condenser, expansion valve and evaporator. When working, the gaseous refrigerant is compressed into a high-temperature and high-pressure gas through the compressor, and then enters the condenser, and the condenser converts the high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure liquid refrigerant.

The liquid refrigerant then passes through the expansion valve, the so-called expansion valve is a throttling device, because the refrigerant flowing out of the expansion valve is contained, so the refrigerant pressure decreases after it comes out, and the temperature continues to drop, becoming a gas-liquid two-phase. Then enter the evaporator, and the refrigerant at this time undergoes heat exchange gasification in the evaporator, and becomes a gaseous refrigerant with high temperature and low pressure and returns to the compressor to continue circulation.

If the refrigerator compressor is changed too large, it may lead to the following consequences:

2.Poor refrigeration effect: The refrigeration capacity of a large compressor is too large, which may cause the internal temperature of the refrigerator to be too low or too high, affecting the refrigeration effect.

3.Increased noise: Large compressors are noisy and may affect the quiet sailing environment of the home.

4.Shortened life: Large compressors operate under a large load, which may shorten the life of the refrigerator.

Therefore, when replacing the refrigerator compressor, you should choose the appropriate specifications to ensure the normal operation and service life of the refrigerator.

If you replace your refrigerator compressor with a larger one, it can cause the following problems:

2.Unstable temperature: A larger compressor may cause the temperature inside the refrigerator to be unstable, as it may produce too much cold air, causing the temperature inside the refrigerator to be too low.

4.Shorter life: A larger compressor may result in a shorter life of the refrigerator because it requires more energy to operate, which can cause the refrigerator's components to wear out more quickly.

Therefore, when replacing the refrigerator compressor, you should choose the same specifications as the original compressor to ensure the normal operation of the refrigerator.

There is no problem with changing large and small, and the cooling capacity should not exceed 80%. There is no need to change any piping, just replace it. In order to reduce costs, manufacturers will set the smallest compressor for all original freezers, and will not use the maximum power to increase costs.

So the conclusion: you can only change the big for the small, not the small for the big. Double the size of the compressor, but it is best not to exceed this number After the freezer refrigeration system is replaced with a compressor with a larger capacity, it is necessary to readjust the filling amount of refrigerant in the refrigeration system pipeline to the best state, otherwise the operation of the refrigeration system is prone to abnormality.

2. For serious holding and cylinder jamming, it is necessary to replace the compressor with a new one.

3. First use a cutter or scissors to open the hole of the process pipe to release the refrigerant, and then disconnect the pipe from the original pipe joint, loosen the screws, and take out the compressor, so that the lubricating oil in the casing can be poured out of the return pipe, and the oil volume is recorded as the basis for refueling after repair.

4. Can be sawed by hand, can also be cut by special machine tools, the state dismantling compressor shell should be wiped clean before sawing, and the weld of the upper and lower shells of the compressor should be repaired after the mark after the wide trace, when sawing, it is necessary to pay attention to the depth of the cut to prevent damage to the components inside, after cutting the shell, do not disassemble the parts in the machine at will, carefully observe whether the exhaust pipe and the lifting spring are broken, whether the rotor and piston of the rotating motor are flexible, whether the suction pipe is unblocked, etc., after analysis to determine the hole barrier or fault parts, before dismantling and repairing, In order not to expand the failure and increase the workload of dismantling and repair.

5. Dismantling and repair of compressor motor: Generally speaking, there are many cases of motor winding burning, so you can loosen and fix the bolts first, take out the stator, and then repair the stator winding.

Hello, the replacement of the refrigerator compressor will affect the energy efficiency level, and the compressor power replacement should consider several issues: 1. The original compressor power can meet the requirements of refrigeration, and the power change may sometimes produce difficulties in starting. 2. The compressor power has changed, and the refrigeration speed may be different from the original.

3. The key is that the refrigerant charge should be accurate, if it is not accurate, it will cause no downtime, and even if the thermostat is replaced, there is no effect. You can observe whether there is frost in the compressor return pipe, if there is frost, it means that there is too much refrigerant, and some should be released. There are a lot of creams, some of which are floating creams, and there is no freezing effect at all.

In addition, there must be no air in the pipes, otherwise it will affect the refrigeration.