Structure and principle of industrial ice machine ICE COOL
Structure of industrial ice machine ICE COOL
Compressor: is the heart of the ice production system responsible for circulating gas in the system.
Pressure protection relays and gauges. There are 3 clocks and protection relays for the compressor:
- Low pressure (left): protects compressor suction pressure. Suction pressure is usually greater than 0 and less than 4 kg/cm2. Except for the defrost and shutdown phase, the low pressure will be higher.
- Oil/oil pressure (in the middle): protects the lubricating function of the machine. Oil pressure is usually at least 1 kg/cm2 higher than low pressure.
- High pressure (right): protects the compressor discharge pressure. High pressure should not exceed 20 Kg/cm2.
Condenser: is a heat exchanger to cool the gas at the compressor push end thanks to a water heat dissipation system.
Water cooling system includes water pump, cooling tower and connecting plastic pipes. Cooling tower, located outside the plant, where there is ventilation and ventilation.
High-pressure container: to store the high-pressure liquid refrigerant after it has been cooled from the condenser. The task of releasing the heat exchanger surface of the condenser and providing an adequate amount of refrigerant for the refrigeration system
The stone mill is the place where ice cubes are created. Has a beam-shaped structure, inside the tube is water that is melted to form ice, and outside the tube is refrigerant gas.
On the stone mortar, there are water whisks to divide the water flowing evenly and the relay floats to measure the water level to send the required rock signal to the control system.
Liquid separator is a device placed higher than the sieve on the stone mortar to separate liquid back to the stone mortar and cold vapor to the compressor. Avoid liquid flooding of refrigeration compressors.
Heat-saving heat exchanger: Exchange heat upstream between the refrigerant from the stone mortar entering the heat recovery vessel to the compressor suction line with the liquid in the container passing through the throttle valve to supply fluid to the stone mortar.
Throttle valve: is a device that reduces gas pressure and has a small cross-section that causes the gas temperature to drop to a deep negative temperature suddenly. Cool the ice cube tubes.
The return valve is a device to adjust the amount of oil returning to the compressor, avoiding oil loss in the compressor.
The filter is installed after the high pressure tank and before entering the throttle to clean the gas.
The solenoid valve is used to supply gas to the stone mortar. There are 3 solenoid valves used:
- Fluid supply solenoid valve: supply liquid gas to the throttle valve to supply the stone mortar.
- Main defrost valve: Supply high-pressure hot gas through the sieve, helping to defrost quickly.
- Auxiliary defrost valve: supply steam from the tank to the stone mortar to help balance the pressure of the system.
Manual stop valves are used to isolate key equipment during maintenance, repair or inspection. If there are no stop valves, it will be difficult or lose a lot of gas when troubleshooting.
Control cabinet: operating the system, setting parameters, protecting equipment and checking for errors if any.
In addition to the above devices, there are other devices such as:
- Ice hats
- Stone cutter
- Plastic valves.
Principle of ice machine industrial institute ICE COOL
– Refrigeration compressor sucks refrigerant gas in the system to the low pressure suction end and compresses it to high pressure. Compressed gas with high pressure has a high temperature above 100 degrees Celsius.
– High pressure gas through the one-way valve and to the cooling condenser. Thanks to the cooling water being pumped in, the water receives heat from the hot gas and transfers the hot water to the cooling tower.
– The cooling tower irrigates, sprinkles and thanks to the high-flow blower, cools the water before returning to the condenser to receive a lot through the cooling tower water pump.
– Hot gas after being cooled with a temperature of about 40-45 degrees Celsius will be returned to the reserve high-pressure container.
– From the high-pressure container, gas from the bottom of the tank is passed through a filter to filter out dust before passing through the throttle valve thanks to the closing and closing of the fluid supply solenoid valve (the stone mortar gas supply valve).
– When liquid gas passes through the throttle valve, thanks to the special structure of the throttle valve and the specific properties of the gas. The gas temperature drops from -15 to -20 degrees Celsius and the pressure drops.
– Cold gas is evenly distributed throughout the ice cube mill to cool the water in the ice tube.
– Water for making ice is pumped with cold water and circulated from the water tank under the stone mortar to the top of the stone tower.
– Thanks to the special design of the water divider, the water is run into the ice tube under control and according to the principle of curtain flow, the pure water is frozen and kept in the ice tube until the tube is closed so that the water can continue to flow.
– Above the stone mortar, there is a float valve that senses the water level. When the ice is sealed, the water level rises and sends a signal to the PLC control center to signal that the ice has reached and is ready to defrost.
– Thanks to the PLC ICE COOL programming system, the control system gives a signal to stop the liquid supply into the ice mortar, stop the water pump and proceed to discharge the hot gas and the mortar in sequence.
– After hot gas is supplied to the stone mortar, the temperature of the stone mortar gradually increases, causing the pipes to heat up. The ice in the ice tubes melts to the surface and slides off the ice tubes. At that time, the stone cutter operates and cuts the stone into short pieces as designed.
– Ice is removed from the mortar thanks to the special design of the stone cone. The ice is taken out of the stone mill and into the bucket to wait for the packing to be transported to the warehouse.
– After the ice has been released from the machine, the control system sends a signal to the equipment to return to the ice-making state until the required amount of ice is guaranteed.
– In the ice making sequences, there are sub-control processes. You can find more information on the website: www.maydavien.com