Wuxi Guanya Refrigeration Technology co., ltd

The Phenomenon of Ice Jam in Low Temperature Chiller System

The phenomenon of ice jam in low temperature chiller system is mainly due to the excessive water in the refrigeration system. With the continuous circulation of refrigerants, the water in the refrigeration system gradually concentrates at the outlet of expansion valve. Because the outlet of expansion valve has the lowest temperature, the water turns into ice and the ice enlarges gradually. To a certain extent, the expansion valve will be completely blocked, resulting that the refrigerant can not be recycled, and the cold storage will not refrigerate.

The phenomenon of ice jam in low temperature chiller system is normal in the initial stage. There is frost in the evaporator, heat dissipation of the condenser, stable operation of the unit, clear and stable movement of refrigerant in the evaporator. With the formation of ice jam, the air flow is gradually weakened and intermittent. When the jam becomes serious, the sound of air flow  completely disappears. The refrigerant cycle is interrupted. And the condenser is gradually cooled.
Because of the blockage, the exhaust pressure rises. The sound of the machine increases. There is no refrigerant flowing into the evaporator. The frost area decreases gradually. The temperature increases gradually, and the temperature of the expansion valve rises together, so the ice begins to melt. At this time, the refrigerant begins to recycle again. After a period of time, ice blockage occurs again, forming a periodic phenomenon of through-blockage.

Troubleshooting of Ice Block

The ice jam failure of low temperature chiller system is due to excessive moisture in the system, so the whole refrigeration system must be dried. There are two ways to deal with it:

1. Heat and dry the components of the refrigerant system in a drying box. Remove the compressor, condenser, evaporator, expansion valve and return pipe in the refrigerant system  from the cold storage and put them into the drying box for heating and drying.

2. Remove the water content of each part of the refrigeration system by heating and secondary vacuum extraction.

Related News
Related Products
  • Water Cooled Chiller

    Water Cooled Chiller

    January 11, 2018Temperature ranges from - 5 ~ - 150 ℃, can meet different temperature; Adopt environmental protection refrigerants; Famous brand semi-closed piston compressor, semi-closed bipolar piston compressor, semi-hermetic screw compressor, main brand are BOCK.view
  • High-Low Temperature Test Chamber

    High-Low Temperature Test Chamber

    March 30, 2018Performance characteristics:1. In the refrigeration system, the condensation adopts air cooling mode, which has a wide temperature control range, which can meet the user's various needs.2. With a unique b...view
  • Humidity Test Chamber

    Humidity Test Chamber

    April 8, 2018Performance characteristics: 1. With wide temperature control range, can meet the user's various needs.2. With a unique balanced temperature control method, with stable and balanced heating capacity, high precision and high stable temperature control canview
  • Single Fluid Heat Transfer System SR

    Single Fluid Heat Transfer System SR

    April 10, 2018Working temperature range from -25℃to 200℃, other temperature range need to set to the widest temperature range(-50℃to 250℃) Centralized control of 2~20 reactors, each reactor's and jacket temperature can be set independently. One system control multipleview
  • Reactor Temperature System ZLF

    Reactor Temperature System ZLF

    April 10, 2018A set of cooling heat exchanger, heat exchanger, through proportional adjusting valve control cold heat into the heat exchanger, then through the uniform medium input to the reactor jacketed to do heat exchange and temp. Control, system has inside expansiview
  • Small Gas Condensing System

    Small Gas Condensing System

    April 10, 2018ModelHQ-0540HQ-1040HQ-2540HQ-5040HQ-0575WHQ-1075WHQ-2575WHQ-5075WGas flow5m3/h10m3/h25m3/h50m3/h5m3/h10m3/h25m3/h50m3/hLowest Temp.-40℃-40℃-40℃-40℃-75℃-75℃-75℃-75℃Primary Temp.There is no-20℃...view
products
Contact
Tel: + 86 18751547965
E-mail: sales@cnzlj.com
Add: No.203, Hongyun Road, Hongshan Street, Optoelectronics Park, Xinwu District, Wuxi City, Jiangsu Province, China
code chat