冷凍機の故障原因の分析

2022/09/27 分類業界ニュース 315

冷凍機の故障原因の分析

1. Poor condensation

Compressor current:

If the condensation effect is not good, the condensation pressure will rise, and the same exhaust pressure will rise. The load on the compressor increases and the current increases.

High pressure:

Poor condensation, the heat of the high-pressure refrigerant cannot be taken away, and the condensation pressure of the refrigeration unit is high, resulting in a high high-pressure pressure.

Low pressure:

The high pressure is high, and when the expansion valve opening is the same, the low pressure also increases.

Exhaust temperature (case temperature):

If the high pressure increases, the condensing temperature also increases, and the discharge temperature of the compressor also increases.

2. Capillary blockage

Compressor current:

The effect of capillary blockage (throttling structure) is that the refrigerant from the compressor can only reach the condenser and the liquid pipe, and cannot enter the evaporator, which will inevitably lead to an increase in the compressor load and current, and finally the compressor must Overload protection.

High pressure:

The capillary is blocked, the high pressure cannot reach the low pressure side, and the high pressure rises.

Low pressure:

The capillary is blocked, all the refrigerant on the low-pressure side is sucked into the compressor, and the refrigerant on the high-pressure side cannot pass through, which will inevitably lead to low low pressure.

Exhaust temperature (case temperature):

If the high pressure increases, the condensing temperature also increases, and the discharge temperature of the compressor also increases.

3. Poor compression

Compressor current:

If the compression is poor, we can think that the pressure ratio of the compressor does not meet our requirements. At this time, the load of the compressor is small and the current is also small.

High pressure:

The pressure ratio of the compressor is small, and we can think that there is no compression at the limit. At this time, the pressure is the balance pressure, and the high pressure must be low.

Low pressure:

The pressure ratio of the compressor is small, and we can think that there is no compression at the limit. At this time, the pressure is the balance pressure, and the low pressure must be high.

Exhaust temperature (case temperature):

There is no compression, and the exhaust temperature is room temperature, so it is lowered.

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