Air-cooled chiller

1Air-cooled chillerOverview
Kassel air-cooled screw chiller can be adjusted from 5 ℃ to 35 ℃ for normal temperature type and from -40 ℃ to 5 ℃ for low temperature type. It can be divided into chiller and hot water machine. The machine has the advantages of high efficiency, small size, low noise, simple operation, and long service life. Using air as a circulating medium, it does not require water consumption, is suitable for water scarce areas or places with high requirements for the surrounding environment, and is environmentally friendly. Due to the use of air cooling, the installation of cooling towers and cooling water pumps is omitted, making the system relatively simple. It can be directly placed outdoors on the roof, saving space in the computer room. The unit can provide -5-5 ℃ ethylene glycol aqueous solution (10% concentration) and 5 ℃ -15 ℃ chilled water, which can be used as the host for ice storage, low-temperature air conditioning, and various other places with chilled water requirements above -5 ℃. It can also provide 30-52 ℃ hot water heating. It is widely used in central air conditioning systems and various industrial refrigeration processes to meet the cooling and heating needs of enterprises in various places, improve product quality, and reduce enterprise costs.
The heat recovery unit in the Kassel air-cooled screw chiller has added heat collector technology on the basis of the standard model, fully recovering the sensible heat in the compressor exhaust, so that the equipment can not only meet the needs of the above cold sources, but also provide additional high-grade hot water for domestic and heating use.

IIAir-cooled chillerApplication Industry
1. Central air conditioning in various industries
2. Mold cooling in the plastic industry
3. Cooling of electroplating tanks in the electronic electroplating industry
4. Ultrasonic cleaning solution cooling
5. Various cooling systems in the chemical industry
6. Various cooling systems in the food industry
7. Cooling in the metallurgical, petrochemical, mechanical, pharmaceutical, electrophoresis, and aluminum oxidation industries
8. Cooling for industries such as printing, synthetic leather, vacuum coating, wallpaper, etc
9. Cooling of dust-free workshops in various industries

3、 Characteristics
1. High precision large screen touch screen, industrial grade intelligent controller and advanced computer control system, fully digital Han display, connected to external devices, remote users and control rooms through standard interfaces, can achieve the following multiple control functions
2. Independent refrigeration system design, multi head units are relatively independent, with minimal moving parts and reliable operation
3. Adopting imported high-efficiency economical semi enclosed twin-screw compressor, it has high energy efficiency, reliable operation, long service life, and is equipped with an exhaust and air purifier to ensure low-noise operation of the unit
4. Under minimal load (25%), each refrigeration system compressor starts with star delta voltage reduction, effectively reducing the starting current and impact on the power grid.
5. The compressor adopts a brand, a new high-efficiency screw rotary sub compressor, which has energy efficiency 20-30% higher than general compressors
6. The flexible adjustable design enables the unit to continuously adjust energy between 25% - (stepless adjustable), ensuring the maximum efficiency of the compressor and helping users save operating costs to the greatest extent possible
7. The heat recovery type uses a heat collector technology, with a heat recovery capacity of up to 30% -40% of the cooling capacity in summer, and a maximum heat recovery capacity of up to 75% for process chillers used in winter
8. Successfully passed the ISO9001:2000 quality and physical certification.
9. Capacity control can be achieved through four stage (-75% -50% -25%) or three stage (-66% -33%) and non segmented control systems
10. Efficient 5:6 asymmetric gear profile
11. Adopting a combination design of 11 bearings and A-type axial thrust balance drum, the bearing life is significantly improved by 2.5-3.5 times
12. Multiple refrigerants to choose from. In addition to R22 refrigerant, environmentally friendly refrigerants such as R134a, R407c, R410, R404a can also be used
13. Select branded control components such as thermal expansion valves, solenoid valves, and check valves to ensure efficient and reliable operation of the unit over a wide range of operating conditions
14. Automatic power on/off, automatically achieving unmanned operation management according to the predetermined work plan
15. Multiple password settings ensure that the device will not be shut down or damaged due to accidental factors
16. After comprehensive testing and full load operation testing at the Kassel factory, the product is shipped with refrigerant to ensure that the equipment can start working after water and electricity are in place
17. Explosion proof, high-precision and other special models can be customized
18. Multiple protection functions: compressor exhaust over temperature, motor over temperature, cold water anti freezing, etc. Temperature protection: overcurrent, phase loss, reverse phase, etc. Electrical protection: refrigerant system high and low voltage, oil level, water cut-off and other emergency state protection

Fully equipped with security protection functions
Pressure protection: automatic protection devices for high and low pressure in refrigeration systems;
Power protection: undervoltage protection, phase loss protection, reverse phase protection, overload protection, motor overheating protection;
Anti freezing protection: When the temperature of the chilled water is too low, the unit will automatically shut down;
Safety valve protection: When the refrigerant pressure exceeds a certain value, the safety exhaust valve will automatically open;
Delay protection: Compressor delay start protection to prevent frequent compressor starts;
Oil level protection: activate the protection device when the oil level of the compressor is too low;
Water flow protection: When the water flow stops or decreases, continuing to operate will harm the unit and the unit will automatically shut down;