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  • Signs of normal operation of refrigeration system and causes of common failures

    Signs of normal operation of refrigeration system: 1.The compressor should run smoothly without any noise after starting, and the protection and control components should work normally. 2.Cooling water and refrigerant water should be sufficient 3.The oil will not foam much, the oil level is not ...
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  • Get out of the misunderstanding of “condensed water”

    Condensed water, commonly known as “condensation”, is shown in pipes, air conditioning panels, vents and other objects on the water trace or even water droplets.Causes the wind pipe and the hanger to be soaked, the tuyere dripping water, the smallpox dripping water, the metope seepage...
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  • Common conversion unit table for refrigeration

    Common conversion unit table for refrigeration

    Common units and conversion 1 MW = 1000 KW 1 KW=1000 W 1 KW=861Kcal/h=0.39 P 1 W= 1 J/s 0.1MPa=1kg/cm2=10m mercury column =100KPa 1 USTR=3024Kcal/h=3517W(冷量) 1 BTU=0.252kcal/h=1055J 1 BTU/H=0.252kcal/h 1 BTU/H=0.2931W 1 MTU/H=0.2931KW 1 HP(electricity)=0.75KW(electricity) 1 KW(electricity...
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  • How to deel with the impurity in the refrigeration system?

    How to deel with the impurity in the refrigeration system?

    1.The effect of water on the system I.Ice plug at expansion valve,resulting in poor fluid supply II.Part of the lubricating oil is emulsified,reduce the lubrication performance III.Hydrochloric acid and hydrogen fluoride are generated in the refrigerant system, which can corrode metal.And it has...
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  • Advantages and disadvantages of 5 compressors

    Advantages and disadvantages of 5 compressors

    1.Half-sealed piston refrigeration compressor Semi-enclosed piston compressors are more commonly used in cold storage and refrigerated markets (commercial refrigerated air conditioning is also useful, but is now used relatively infrequently). The semi-closed piston type cold storage compressor is...
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  • The reasons for motor burning

    The reasons for motor burning

    The reasons for motor burning can be divided into: load, power supply, motor insulation, default phase 1.Default phase Reason:Usually due to the lack of phase power.(1 phase unsupplied or insufficient supply voltage).Or the contactor contact point in the line is not closed.The wire connection poi...
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  • Thermoplastic composites are popular in Europe

    Thermoplastic composites are popular in Europe

    According to a market report released by Lucintel,Thermoplastic composites in the European consumer goods market are expected to grow at a compound annual growth rate of 2% from 2017 to 2022.It could reach $1.2 billion by 2022.In the European market for consumer goods, The opportunity for thermop...
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  • Why set oil return tube

    Why set oil return tube

    1.Why set oil return tube ? When there is a large height difference in the piping of the system, in order to prevent the refrigerating oil from effectively returning to the compressor and affecting the service life of the compressor, the oil storage tube must be set on the vertical pipe line. &nb...
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  • Bad frozen oil ruined a compressor

    Bad frozen oil ruined a compressor

    1.Viscosity of frozen oil:The frozen oil has a certain viscosity to keep the friction surface of the moving parts in good lubrication state, so that it can take part of the heat from the compressor and play a sealing role. The oil works at two extreme temperatures:Compressor exhaust valve tempera...
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  • Resin processing costs skyrocketed

    Resin processing costs skyrocketed

    According to a survey report on the status of members of the Japan plastics industry association from April to June 2018,production and sales increased from January to march.On the one hand, the “upturn” in the amount calculation decreased and the “deterioration” increased...
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  • How to removing scale in shell – tube condenser

    How to removing scale in shell – tube condenser

    There are three ways to prevent and remove scale: 1. Mechanical descaling method: mechanical descaling is a method of descaling the condenser of steel cooling tube with a soft shaft pipe washer, especially for vertical shell and tube condenser. The operation method: ⑴Extract the refrigerant from...
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  • Comprehensive knowledge of refrigeration oil

    Comprehensive knowledge of refrigeration oil

    Classification of refrigerant oil One is traditional mineral oil; The other is synthetic polyethylene glycol esters such as PO,Polyester oil is also synthetic polyethylene glycol lubricating oil.POE oil can be used not only in HFC refrigerant system, but also in hydrocarbon refrigerant.PAG oil ca...
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