8HP to 20HP cold room refrigeration unit low temperature
refrigeration condensing unit cascade refrigerator unit
Customized products, if you need more parameters, please contact
the factory
Application scenarios: occasions that require low temperature
applications, such as blood plasma freezing, test cold storage,
electronic factory aerospace simulation test, according to
different customer needs, generally divided into several
requirements, there are -60 degrees, -70 degrees, some -110
degrees, we can provide to customers. Main features: compressors include Bitzer piston, Taikang piston,
Shenyang Copeland piston, Bitzer screw and other famous brand
compressors, all of which can be used as cascade units, and small
ones are generally air-cooled.
| Compressor Horsepower | First stage R404A | Second stage R23 | “-70℃ refrigeration capacity KW |
| 8HP | 4YD10Y | 4YD8Y | 4.5 |
| 10HP | 4YD12Y | 4YD10Y | 5 |
| 12HP | 4YD15Y | 4YD12Y | 6.1 |
| 15HP | 4YD20Y | 4YD15Y | 9.2 |
| 20HP | 4YD20Y | 4YD20Y | 10.5 |
We provide many different types of cascade units, the following is
a partial list of models:
The cascade refrigeration cycle is mainly composed of two complete
refrigeration systems, a high-temperature part and a
low-temperature part. Among them, the evaporator of the high
temperature part is the condenser of the low temperature part, so
it is called the evaporative condenser, and the rest is basically
the same as the general refrigeration device.
(1) Filter drier: It can remove the moisture and impurities in the
liquid refrigerant from the condenser, and prevent the formation of
ice blockage and dirty blockage at the expansion valve or filter
drier.
(2) Solenoid valve: It automatically cuts off the liquid supply to
prevent excessive refrigerant from entering the evaporator after
shutdown, so as to avoid wet stroke or liquid shock when the
machine is turned on next time.
(3) Regenerator: heat exchange between the supply liquid and the
return air, supercool the liquid refrigerant, increase the
refrigeration capacity per unit mass, and at the same time increase
the superheat of the return air to prevent the wet stroke and
liquid hammer of the compressor.
(4) Oil separator: Separate the lubricating oil from the compressor
exhaust and return it to the crankcase to prevent the oil from
entering the heat exchanger and affecting the heat transfer
efficiency, while ensuring the lubrication of the compressor.
