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Supermarket refrigerated showcase refrigeration failures and maintenance methods (3)

supermarket refrigerated showcase refrigeration failures and maintenance methods (3) poor refrigeration and oil stains at the root of the compressor nozzle. Failure phenomenon: poor cooling, black mush at the root of a compressor nozzle Oily. Fault analysis: 80% of the oil stains are leaking points, causing refrigerant leakage, and very few other refrigeration pipelines or compressors have poo...

commercial refrigerationTIME：2016-08-22
walk-in cooler refrigeration failure and maintenance method (4)

walk-in cooler refrigeration failure and maintenance method (4) Poor refrigeration and corrosion of the middle door frame. Trouble phenomenon: Poor refrigeration, open the freezer door. See rust in the middle door frame. Failure analysis: 80% of the walk-in cooler body door frame leak prevention pipe leakage, leakage of refrigerant, some leakage in other parts or poor compressor exhaust pe...

walk-in display coolersTIME：2016-08-22
walk-in cooler refrigeration failure and maintenance method (5)

walk-in cooler refrigeration failure and maintenance method (5) Poor refrigeration and corrosion-like failure phenomenon somewhere in the evaporator: Poor refrigeration, corrosion-like somewhere in the evaporator pipe. Fault analysis: 60% is the leakage of the corrosive refrigeration pipeline, followed by the leakage of other refrigeration pipelines, and the compressor performance is poor ...

display refrigeratorTIME：2016-08-22
The selection of expansion valve in supermarket refrigerated showcase

The selection of expansion valve in supermarket refrigerated showcase The selection of expansion valve in supermarket refrigerated showcase Three types of thermal expansion valves. The selection of expansion valve is mainly based on the capacity of the valve. The pressure difference between the front and rear of the valve and other factors are considered when selecting the type, and its type i...

display freezerTIME：2016-08-22
Selection of expansion valve in display cases (2)

Selection of expansion valve in display cases (2) Selection of other refrigeration equipment 1. Selection of intercooler Two conditions should be met: First, the speed of gas passing through the cross section of the intercooler should meet the requirements of gas-liquid separation, and the general flow rate should not exceed 0.5m/s; Second, the heat transfer area should meet the requirem...

display freezerTIME：2016-08-22
Selection of expansion valve in commercial refrigeration (3)

Selection of expansion valve in commercial refrigeration (3) 3. Oil separator selection calculation The oil separator selection calculation is mainly to determine the oil separation The diameter of the filter is to ensure that the flow rate of the refrigerant in the oil separator meets the requirements of oil separation and achieves a good oil separation effect. 4. Selection and calculation ...

commercial refrigerationTIME：2016-08-22
display cases Refrigeration failures and maintenance methods (6)

display cases Refrigeration failures and maintenance methods (6) Poor cooling but no abnormal appearance. No abnormal appearance, including normal compressor running sound, and no oil stains on the back of the display cases. , In the display cases, there is no corrosion in the evaporator pipes, and there is no rust on the side of the freezer compartment of the middle door frame. During mainten...

display freezerTIME：2016-08-22
display cooler refrigeration failures and maintenance methods (7)

display cooler refrigeration failures and maintenance methods (7) ① to prevent dew The pressure of the pipe is 1.2MPa and the pressure is maintained for 24 hours. If the pressure gauge drops below 1.1MPa, it is necessary to judge that the anti-exposure pipe is leaking. It should be thrown away and directly connect the condenser nozzle to the compressor exhaust pipe. ②For the low-pressure...

display freezerTIME：2016-08-22
display cases refrigeration failures and maintenance methods (eight)

display cases refrigeration failures and maintenance methods (eight) ③ blow to the system Pass, replace the dry filter, evacuate, add refrigerant, and seal. [Note] For the old model, after checking that the refrigeration system is indeed free of leaks and the compression and exhaust performance is good, it is estimated that the inner wall of the capillary tube adsorbs the membrane fouling ...

walk-in display coolersTIME：2016-08-22
The selection of the expansion valve in the display cooler (4)

The selection of the expansion valve in the display cooler (4) 3) The suction head of the ammonia pump. Various forms of ammonia pumps have their own structure according to their own structure. Cavitation allowance. Cavitation allowance is the suction head necessary for the pump to avoid cavitation. It is called net positive suction head (NPSH). NPSH is an important parameter in pump performan...

display freezerTIME：2016-08-22

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