Centrifugal water-cooled unit

High efficiency compressor

Through the most ideal design of the impeller and diffuser, the efficiency of the refrigerant is maximized By improving the specifications of the original ice water machine and selecting the optimal impeller diameter and speed, a high-efficiency compressor can be achieved. The capacity control valve can be adjusted within a range of 5% -100%, displaying unloading characteristics and further improving efficiency

heat exchanger

There are "energy-saving type" and "universal standard type" respectively Composed of an appropriate high-efficiency compressor independently combined with a condenser and evaporator This is a combination of twin cell heat exchangers, and the power consumption rate of the ice water machine can meet all requirements

Nucleate boiling copper tube

We confirm that the theoretical value of reducing power consumption in the evaporator by using an internally patterned Thermo excel-E tube instead of the earlier used one

Special fin tube

We also confirm that using a special fin tube Thermo excel-C tube to reduce the condensation temperature and improve the heat transfer capacity of the condenser does indeed reduce the theoretical value of power consumption

High efficiency motor

High efficiency motors have high-density magnetic flux, reduce power demand, and thus can save energy

Japanese JIS/Korean KS National Standards

The rated values for design and manufacturing are based on the Japanese JIS B 8621 national standard and the Korean KS B 6270 (the same as JIS) national standard

starter

The Y-Δ starter can be assembled in the original factory and can be either sealed or open. Can reduce current/voltage conversion startup.

The control circuit is equipped with a 3KVA transformer.

Equipped with electronic overload protection device.

Underphase reverse phase protection device.

The starter drive shall comply with NEMA or local national standards.

Condenser and ice water heater

Shell and tube heat exchangers and finned copper tubes are detachable and replaceable, and are fixed to end steel plates with mechanical expansion tubes.

The design and manufacturing are based on Japanese JIS B 8621-1995 and Korean KS B 6270 national standards.

The evaporator has 2 circuits, and the condenser has 2 or 3 circuits. The fouling coefficient can be selected according to the rated conditions of ARI 550/590-98 standard. The evaporator has a rating of 0.0001hrft2F0/Btu, and the condenser has a rating of 0.00025 hrft2F0/Btu.

The standard pressure vessel is designed with a working pressure of 150 PSIG on the water side, 150 PSIG on the condenser side evaporator, and 300 PSIG on the condenser. The test pressure is at least 1.5 times the working pressure.

The condenser can be used as a pump to store refrigerant during maintenance and repair.

The inlet and outlet pipes can be connected with VICTAULIC CONNECTION.

High efficiency refrigerant flow control device with suction regulating valve and orifice plate.

Compressor and motor

Sealed single-stage compressor, gear transmission device, aluminum alloy impeller, and motor cooled with refrigerant.

The oil hydraulic multi-stage control suction end gas guide vane valve can adjust the capacity by 15% -100%.

Induction squirrel cage motors are equipped with overload and high temperature protection devices.

Equipped with a mobile diffuser anti surge (SURGE) device.

lubrication system

The independent oil lubrication system includes an oil separator, oil pump, oil filter, pressure regulator, and water-cooled oil cooler.

When the power supply is urgently stopped, the emergency oil lubrication system operates to protect the compressor.

MICOM microcomputer control function

Automatic start/stop control.

Automatic capacity adjustment control of 15% -20%.

The compressor starts without load under any conditions.

Interlocking control contacts for ice water pumps, cooling water pumps, and cooling tower fans.

High pressure switch for refrigerant.

Low pressure switch for refrigerant.

Evaporator ice water temperature too low antifreeze protection switch.

Low oil pressure switch.

High oil pressure switch.

Motor high temperature protection switch.

No water flow or low water flow switch.

The motor current limiting device can adjust the capacity control mechanism to maintain the motor current operating at the maximum safe value.

Microcomputer display function

High/low pressure of refrigerant (or displayed by instruments).

Ice water temperature in/out.

Cooling water temperature inlet/outlet.

Oil temperature.

Compressor discharge temperature.

Percentage of motor operating current.

Fault alarm display:

Refrigerant pressure too high/too low

The temperature of refrigerant discharge is too high

Ice water temperature and outlet temperature are too low

Abnormal oil temperature

low oil pressure

Motor temperature too high

Motor current too high

No water flow or low water flow

Fault display and automatic shutdown immediately. The host can only be restarted after all fault conditions have been resolved and reset.

All control wiring is connected to the central control panel terminal block.

The screen displays the current time and condition report of the fault, and records of current and previous faults are stored in the memory, with the most recent fault content recorded 10 times.