Shanghai Nuobing specializes in the research and production of low-temperature freezing equipment such as ethylene glycol freezers and brine freezers, which are widely used in the fields of chemical, pharmaceutical intermediates, new materials, etc. The lowest temperature can reach-45Du has long been favored by a large number of customers. Oil separation technology, oil cooling technology, and energy-saving economy technology for low-temperature refrigeration equipment such as ethylene glycol refrigerators and saltwater refrigerators produced by Nuobing,PLCMultiple innovative measures such as integrated control technology and efficient heat exchange technology.

The high-quality imported brand twin-screw compressor used in the ethylene glycol freezer and brine freezer only has reciprocating compressors as its moving parts1/10Left and right, radial and axial use together11Only high-precision SwedenSKFThe bearing combination, combined with the axial thrust balance drum, effectively balances the axial load. The rotor operates continuously, and the vibration is only as small as that of reciprocating1/5about; Consider shock absorption during the installation of the entire machine; At the same time, it also ensures the long-term stable operation of the saltwater freezer;

The four stage capacity adjustment method is optional for energy-saving of a single compressor, which can maximize energy savings under partial load conditions while reducing frequent compressor starts, thereby extending the service life of the low-temperature freezer; In combinationPLCThe highly intelligent control enables the unit to achieve the optimal energy efficiency ratio under both full load and partial load conditions, significantly reducing the operating costs for users; By combining multiple compressors, more detailed multi-stage capacity adjustment can be achieved;

Low temperature freezer can also be used25%-100%The capacity of the refrigeration unit can be adjusted continuously, but in order to ensure the long-term safe operation of the ethylene glycol refrigeration unit and saltwater refrigeration unit, it cannot be applied to extremely harsh environments or to be kept below the nominal refrigeration capacity of the unit for a long time50%Please confirm with our technical department before placing an order for operation;

The oil return method used in ethylene glycol refrigerators and saltwater refrigerators is differential pressure oil return, which does not require the use of external oil pumps and greatly reduces the failure rate of the oil supply system; The compressor adopts an advanced three-stage oil filter screen, which achieves a high oil filtration rate99.7%Greatly ensuring the return oil of the compressor;

The low-temperature freezer and ethylene glycol freezer with multiple compressor heads will have a microcomputer that automatically remembers the operating time of each compressor. The compressor with less operating time will be activated first during the next start-up; Similarly, when unloading operation is required, priority will be given to unloading saltwater chillers that have been running for a long time, in order to achieve balanced operation of each compressor and extend the service life of the entire machine;

In order to more fully separate the refrigeration oil from the refrigerant, an external centrifugal high-efficiency oil separator is installed in the ethylene glycol freezer and saltwater freezer, which can greatly reduce the amount of refrigeration oil trapped in the evaporator due to low temperature, ensure the safety of the compressor lubrication system, and also improve the heat transfer efficiency of the evaporator;

When used as an industrial freezer, the low-temperature water produced by the low-temperature ethylene glycol freezer and low-temperature brine freezer can be directly sent to the equipment or container that needs to be cooled. However, in order to control the precise and stable water temperature, the effluent from the brine freezer is often sent to a buffer pool before entering the equipment or container that needs to be cooled.

Salt water chiller and ethylene glycol chiller can be applied to various low-temperature cooling applications in industrial cooling. After adding appropriate antifreeze on the chilled water side, it can achieve0～-35℃The effluent temperature is adjusted to meet different industrial cooling requirements; The commonly used antifreeze solvents include ethylene glycol, sodium chloride, and calcium chloride solutions. In application, it is recommended that customers set different concentrations of antifreeze solutions according to the outlet temperature. Please refer to the attached table for the freezing points of various solutions;

The saltwater freezer has high refrigeration efficiency, consumes less electricity to produce the same amount of refrigeration, and operates with relatively less noise.

In order to better protect the atmosphere, in addition to usingHCFC22In addition, it can also be produced usingHFC407CandHFC134aRefrigeration and air conditioning equipment using green and environmentally friendly refrigeration media;

The saltwater freezer and ethylene glycol freezer adopt advanced technologyPLCControl, highly intelligent, built-in multi-stage timed switch control intelligent mode, can achieve automatic operation 24/7 without any guard value; The control system has reserved linkage control for the water pump internally; Various protection functions are complete, with standard protection including compressor overload protection

Ø Compressor overheat protection

Ø Compressor oil shortage protection

Ø High pressure protection for refrigeration system

Ø Low pressure protection of refrigeration system

Ø Insufficient water flow protection

Ø FROST PROTECTION

Ø Hot water outlet temperature too high protection

Ø Protection against frequent startup

Ø Shutdown antifreeze protection (reserved)

Ø Power supply error, phase loss, overvoltage and undervoltage protection

Appendix 1: Freezing Point of Ethylene Glycol Refrigerator Solution

Appendix 2: Freezing Point of Salt Water Refrigerator Solution: