Cold water units, also known as: freezer, refrigeration units, ice water units, cooling equipment, etc. Because of the wide use of various industries, the requirements for cold water units are different.Its working principle is a multi -functional machine that removes the liquid vapor through compression or thermal absorption refrigeration cycle.In terms of temperature control, it is divided into low-temperature industrial cold water machines and room temperature cold water machines. The temperature of the normal temperature unit is generally controlled within 0 degrees-35 degrees.The temperature control of the low temperature unit is generally about 0 degrees to -100 degrees.
The performance characteristics of cold water units
Break-cold low-temperature cold water machine-Features
Low -temperature cold water machines are special cold water machines designed for special low -temperature environments. Its super cooling capacity is food preservation of food in hotels, restaurants, supermarkets and other commercial places.Food processing frozen/refrigerated, pharmaceutical, chemical and other low -temperature environments provides reliable guarantees.
1. The variety of products is complete, including high temperature (water outlet temperature -5 ° C), medium temperature (water outlet temperature -10 ° C), and low temperature (water outlet temperature -15 ° C).
2. The structure is highly optimized. The heat exchanger board supports the body. The structure is simple, compact and practical.
3. The perfect combination of high -quality screw compressors+the best high -quality and high -efficiency energy heat exchanger, with an energy efficiency ratio of 4.5.
4. Four or sequential capacity controls, accurately coordinate load changes.
Water-cooled low-temperature cold water machine-characteristic
The water -cooled cold water machine is small in size and large in refrigeration.The materials are used to prevent corrosion materials, which effectively prevent rust, corrosion, micro -computer LED number controller, with temperature display, setting temperature, automatic adjustment of frozen water temperature and compressor delay protection function.，配备完善的指示灯，开关，操作一目了然，内置电子水位指示及报警装置，低水位自动报警，操作人员通过控制面板就能掌握冷冻水箱的水位情况，及时补水，独有的模块式设计，每The systems system is safe and independent, and even if a system is problematic, it will not affect the normal work of other systems.
3. Selection of temperature: The process (frozen water) users can be provided between -5 ° C and -60 ° C according to different production needs, and the unit specifications of different water temperature temperatures are selected;
4. According to the needs of users, a variety of loaders (frozen water) can be selected: alcohol -load agent such as ethylene glycol aqueous solution, alcohol, triggea hybrid solution.Calcium water solution.
Cold Water Unit Maintenance Introduction
The order of opening and stopping of cold water units must ensure that the air conditioning host can run normally after starting, and it must be guaranteed:
1. The condenser is good, otherwise it will stop due to the cold-coagulation temperature and the corresponding condensation pressure, which will stop the actions of the high-pressure protective device of the cold water unit and even cause failure.
2. Cold water in the evaporator should circulate, otherwise the temperature of the cold water temperature will be stopped due to the low temperature temperature of the cold water, or it is too low due to the evaporation temperature and the corresponding evaporation pressure.It even caused cold water in the evaporator to freeze and damage the equipment.Therefore, the booting order of the cold water crew is: (must be strictly obeyed) cooling tower fan open-> cooling water pumping-> cold water pump open-> The order of the cold water unit to turn on the cold water unit is: (must be strictly observed) Cold water unitPortation-> Cooling Tower Fans Porta -> Cooling Water Pumps Porta-> Cold Water Pump Stop
Precautions
1. During the shutdown, the cold water crew should be shut down half an hour before get off work. The cold water pump is shut down after get off work, which is conducive to saving energy, while avoiding faults and protecting the crew.
2. Before running the refrigeration cycle, it should be confirmed that the heating circulating pipeline valve should be closed.
Operating procedures
1. Preparation before booting
(1) Confirm that the power of the unit and the controller has been connected.
(2) Confirm that the cooling tower fan, cooling water pump, and cold water pump have been opened.
(3) It is confirmed that the end -end air disk pipe crew has been turned on.
2. Start
(1) Press the status key on the keyboard, and then switch the switch to the unit of the unit on/off (open/off) under the keyboard.
(2) The unit will perform a self -inspection. After a few seconds, one compressor starts, and another compressor starts after the load is increased.
(3) Once the unit starts and all operations are automatic, the unit will automatically start and stop according to the change of the cold load (freezing water backwater).
3. Normal operation
(1) The unit runs normally. The controller will monitor oil pressure, motor current and other parameters of the system. Once any problems occur, the control system will automatically take corresponding measures to protect the crew and display the fault information on the unit screen.(For details, please refer to the installation, operation and maintenance manual)
(2) During the operating cycle every 24 hours, a special person shall have a fixed time interval permanently to record the operating conditions of the unit.
4. Disposal
(1) As long as the crew on/off under the keyboard is turned off to close the position to the disconnected position, the unit can be stopped.
(2) In order to prevent damage, do not cut off the power of the unit even when the unit is shut down.
5. Operation of fan and pump pump
(1) Cooling tower fan, cooling water pump, and cold water pump are controlled independently. Before booting, it should be confirmed that the power supply is normal.
(2) The valves in the pump should be confirmed that the valves in the pipeline have been opened before opening.

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