Wuxi Guanya Refrigeration Technology co., ltd
Cooled Chiller  LJ

Cooled Chiller LJ

  • Cooled Chiller  LJ
  • Ultra-Low Temp. Water-Cooled Chiller-1.JPG
  • Ultra-Low Temp. Water-Cooled Chiller-2.JPG
  • Ultra-Low Temp. Water-Cooled Chiller-3.JPG
Cooled Chiller  LJ


  • Product Description
  • Knowledge Center

-45℃~-10℃

1.Using secondary supercooling technology, refrigeration is rapid;
2.It adopts imported famous brand semi-closed piston compressor, semi-closed piston two-stage compressor and semi-closed screw compressor; the evaporator uses high-force plate heat exchanger, which is small in size and high in efficiency;
3.A full set of imported cold controls (DANFOSS pressure controller, balance valve, expansion valve, solenoid valve, dry filter, Emerson oil separator, ALCO sight glass, check valve, etc.);
4.The intermediate cooling device is used in the cooling water circuit of the unit to significantly improve the reliability and safety of the system;
5.The DANFOSS electronic expansion valve has high control precision;
6.Adopt Siemens PLCS7-200/300 PLCLNEYA touch screen display, carry out automatic control operation, and have temperature curve display, temperature record U disk, fault alarm record;
7.The large-cooling unit adopts a semi-closed screw compressor with an economizer, and is combined with an electronic expansion valve to ensure high efficiency and energy saving;
8.The whole machine is installed. The system has been tested in the factory. The user only needs to install the coolant pipeline and the cooling water pipeline to run.
9.Factory test: Each refrigeration unit is tested at the factory with a load of not less than 12 hours;

Technical Parameters:


Model LJ-6W LJ-10W LJ-15W LJ-20W LJ-30W LJ-40W LJ-60W LJ-90W LJ-120W LJ-180W
Temperature Range -45°C~ -10°C
Cooling Capacity
At -20°C
12kw 20kw 30kw 40kw 60kw 80kw 120kw 180kw 240kw 360kw
10320Kcal/h 17200Kcal/h 25800Kcal/h 34400Kcal/h 51600Kcal/h 68800Kcal/h 103200Kcal/h 154800Kcal/h 206400Kcal/h 309600Kcal/h
Cooling Capacity
At -40°C
6kw 10kw 15kw 20kw 30kw 40kw 60kw 90kw 120kw 180kw
5160Kcal/h 8600Kcal/h 12900Kcal/h 17200Kcal/h 25800Kcal/h 344000Kcal/h 51600Kcal/h 77400Kcal/h 103200Kcal/h 154800Kcal/h
Circulation Pump Info 6.6m³/h 9m³/h 15m³/h 15m³/h 25m³/h 25m³/h 25m³/h 35m³/h 35m³/h 50m³/h
2.5bar max 2.5bar max 2.5bar max 2.5bar max 2.5bar max 2.5bar max 2.5bar max 2.5bar max 2.5bar max 2.5bar max
Inlet&outlet connection size DN-25
PN-10
DN-25
PN-10
DN-32
PN-10
DN-32
PN-10
DN-40
PN-10
DN-40
PN-10
DN-40
PN-10
DN-50
PN-10
DN-50
PN-10
DN-65
PN-10
Cooling Water at 30 degree 8m³/h 10m³/h 16m³/h 20m³/h 25m³/h 30m³/h 38m³/h 55m³/h 70m³/h 100m³/h
Cold Storage tank (optional) 200L 350L 500L 750L 1000L 1200L 1500L 2200L 3000L 4000L
Expansion tank(standard) 100L 175L 250L 350L 500L 600L 750L 1000L 1350L 1800L
Compressor Dorin semi-closed compressor Dorin compressor/HANBELL、Fusheng、Bitzer screw compressor
Operation Panel 7-inch color touch screen display, temperature curve record
Control System Standard: Single-chip micocomputer controller; Stepping control; Set temperature difference of refrigeration on & off
Optional: SIEMENS S7-200PLC&Module
Closed Circulation System The whole system is a full closed circulation, there is no oil mist at high temperature and no water vapor at low temperature, pressure do not rise up when system is running. The system will supplement oil automatically at low temperature
Circulation Pump LNEYA Mangetic Pump/German Brand Mangetic Pump
Evaporator Danfoss/KAORI plate heat exchanger
Condenser Casing type water-cooled condenser / tube-type water-cooled condenser
Intermediate heat exchanger Danfoss/KAORI plate heat exchanger
Refrigeration accessory Oil separators, drying filters, expansion valves, refrigeration solenoid valves, pressure control, mirrors, etc. all use Emerson / Danfoss and other brands
Electric AC contactors, intermediate relays, circuit breakers, thermal relays, etc. are Schneider / ABB brand
Refrigerant R404A/R23 mixture,optional: R125/R23 mixture
Secondary refrigerant No corrosive liquid, ethanol water, heat transfer oil etc.
Safety Protection High pressure protect; water supply cut-off protection; over-current protection; leakage protection; sequential and phase failure protection; High temperature protection; Sensor Failure protection; Liquid low level protection etc. multi-safety protection
Level Indicator Adopt glass liquid level indication
Piping material Expansion tank, cold storage tank and circulation pipeline are all made of SUS304
Case material Channel steel + square tube + cold rolled plate        sealing plate spray 7035
Dimension cm 100*150*185 100*150*185 205*145*205 205*145*205 205*145*175 245*145*205 300*160*225 350*160*205 400*160*225 500*200*225
Power 10kW 14kW 22kW 31kW 45kW 61kW 86kW 127kW 167kW 247kW
dB within 75dB within 80 dB within 90 dB
Weight (kg) 800 950 1100 1350 1500 1800 2400 3100 3600 5000
Optional Optional outside touch screen display controller (separated), the communication line distance is 10 meter
Optional Optional explosion-proof touch screen control system (ExdeIIBT4), the communication line distance is 15 meter

PRODUCTION WORKSHOP REAL MAP:



Tips for Removing Fouling of Water Cooled Industrial Chiller

During the process of production in factory, many chillers wok under the temperature of subzero 45 to zero, and their inner tube wall of condenser is easily fouled, which will affect the heat transfer effect and increase the condensing temperature of  the chillers, and then reduce the cooling capacity and increase the power consumption. So how can we clean it?

1. Close valve of the condenser for the entry of cooling water, use the thermometer tube, the pressure gauge tube or the drain pipe to connect the anticorrosion pump and the dispensing tank to make a small circulation system and clean it in recycle.

2. Add the pickling inhibitor first, which is a special copper corrosion inhibitor. It adheres to the inner wall of the condenser and prevents acid reacted with metal.

3. Add solid acid washing agent, which is used to clean the fouling with the main component of calcium carbonate. The agent is a compound solid organic acid, white crystal, no corrosion to metal, weak acid, and the dosage is determined by the fouling degree of equipment.

4. Add dirt stripping agent (optional), if the condenser equipment is thicker, add dirt stripping agent to promote the products of fouling reaction to quickly dissolve in water and accelerate reaction.

5. Add neutralization passivator, after chemical cleaning of the condenser, neutralizing residual acid to prevent oxidation of metal surface and generate floating rust.

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