[Structure of flake ice machine]The properties and characteristics of flake ice machine introduce the operation principle of flake ice machine
The single structure principle of flake ice machine is as follows: strong>
①The flake ice machine is mainly composed of four parts: evaporator, feed water circulation device, main shaft drive part and control system. Its structure is shown in the figure below:
The water continuously flows into the inner wall of the cylinder B from A in large quantities, and B is cooled to a lower temperature by the refrigeration part. A part of the water is cooled, and the excess water flows back to the base D through C, and maintains a constant water level by the float valve at E. The formed ice is cut into thin slices by the reamer F, and the ice slices slide down the wall. The bearing G on the reamer is supported by two lever arms fixed on H. There are two bearings I on the center shaft. The water pump K ensures the circulation of the water flow between the base D and the pan A through the pipe L. The rotor part is driven by the motor M and the gear set N. Refrigeration products are ensured by the refrigeration section. Inside the double-walled cylinder, adding refrigerant works. :
②Structure principle
The flake ice machine includes the following four parts. installation and future maintenance.
a.Evaporator
The evaporator is where the ice flakes are formed, and the refrigerant in the refrigeration system passes through the walls of the evaporator , conduct heat exchange with water, absorb a large amount of heat, and make the water flowing on the inner wall surface of the evaporator drop sharply to a temperature below the freezing point, and freeze instantly.
b.Water supply circulation device
The water supply circulation device includes a water tank, a Several parts of the water tray and the diversion groove. The specific flow route of water is: the water flow from the external water source enters the water tank. There is a floating ball valve in the water tank to control the water level in the water tank. If there is too much water in the water tank, it will be discharged from the overflow port. Lead to the sewer system; the water pump leads the water from the water tank to the upper part of the ice maker unit, and from the upper water supply opening, injects the water into the water diffuser, and the water diffuser evenly sprinkles the water on the inner wall of the evaporator; part of the water condenses When it becomes ice, the unfrozen water falls into the water collecting tray along the inner wall of the evaporation barrel, flows along the diversion groove, and flows into the water tank for recirculation.
c.Spindle drive section
The low-speed rotation of the spindle is driven by a motor with a reducer.
d.ice scraping part
The ice scraping blade is fixed by the brackets protruding from the upper and lower ends of the main shaft. There are two types, one is a spiral blade and the other is a rake blade as shown in the picture above. The corresponding ice maker structure is different, please pay attention to the product model.
The blade cuts the ice layer along the inner wall of the evaporator, peeling off the inner wall of the ice with a certain thickness to form a certain uniform shape of flake ice. into the lower storage bin.
Flake ice properties and characteristics
Large contact area and fast cooling
Because the flake ice is flat The shape characteristics of ice make it larger than the surface area of other shapes of ice of the same weight. The larger the contact surface area, the better the cooling effect. Taking a comparative example, the minimum surface area of a ton of flake ice is 1579 square meters, and other types of ice such as tube ice and particle ice can only provide 395 to 1294 square meters, so the cooling efficiency of flake ice is higher than that of tube ice and particle ice. 2 to 5 times.
Low production cost
The production cost of flake ice is very economical. It only takes about 85 kWh of electricity to cool water at 16 degrees Celsius into 1 ton of flake ice. .
Excellent food insurance
Flakes have a dry, soft texture without sharp corners, which protects packaged food during refrigeration packaging. Its flat profile minimizes possible damage to refrigerated items.
Complete mixing
Due to the huge surface area of flake ice, its heat exchange process is rapid, and flake ice can quickly melt into water, take away heat, The mixture increases humidity.
Convenient storage and transportation
Due to the dry texture of flake ice, it is not easy to cause adhesion during low temperature storage and spiral transportation, and it is easier to store and transport.
⒈The actual amount of ice used will vary with the water temperature and ambient temperature.
⒉The standard power supply is 3N-380V/50HZ power supply.
⒊The water source is fresh water, and ordinary tap water or groundwater can be used.
⒋The machine should be placed indoors.
⒌The ice type produced by the machine is flake ice, thickness: 1.8-2.2MM.
⒍Standard working conditions: ambient temperature 25℃, water temperature 18-20℃.
Flake ice machine classification
1. Classification from product daily volume:
1. Large Flake Ice Machine
2. Medium Flake Ice Machine
3. Small Flake Ice Machine
2. Classification from the nature of the water source:
1. Seawater flake ice machine
2. Fresh water flake ice machine
Three, whether it can be moved from classification
1. Containerized flake ice machine
2. Non-contained flake ice
4. Classification of daily output
1. Small flake ice machine 0.5 to 3 tons
2. Medium flake ice machine 5 to 20 tons
3. Large flake ice machine 25 to 60 tons
Classification of water source properties
1. Fresh water flake ice machine
2. Sea water marine flake ice machine
Fresh water flake name and the use of fresh water as a water source to produce flake ice. The flake ice machines that use seawater as the water source are mostly used for marine purposes. The marine flake ice machine is designed for marine ice-making operations. It adopts a piston compressor with a semi-closed deep oil tank and a marine seawater condenser, which can not be affected by the sway of the hull and is not corroded by seawater.
Containerized Sorting
The flake ice machine can be placed in a 20-foot or 40-foot container, saving infrastructure costs and making it easy to move and maintain.
Uses of Flake Ice
Ice Flakes are widely used in food processing, manufacturing, and concrete cooling.
Fisheries: Seawater flake ice machines can be installed directly on fishing boats to make ice from seawater. The salvaged seafood can be quickly frozen and preserved, and fishing is one of the most important application areas of flake ice machines all over the world.
Aquatic product processing: Flake ice can reduce the temperature of processing medium, cleaning water and aquatic products, prevent bacterial growth, and keep aquatic products fresh during processing.
Food processing: Use flake ice to quickly cool down to prevent fermentation when stirring or double creaming in bread production.
Poultry meat processing: In the process of poultry and meat processing, huge calorific value will be generated. Flake ice can be used in the cooling process of poultry meat, and at the same time, it can adjust the humidity for products and improve the quality.
Vegetable distribution and preservation: Nowadays, in order to ensure the edible safety of vegetables, fruits and meat, more and more physical methods are used to control temperature in the storage and transportation of products. Flake ice has a rapid cooling effect, which creates a low temperature and high humidity environment, thus ensuring that the subject is not damaged by bacteria.
Pharmaceutical industry: In many biosynthesis and chemical synthesis experiments, large amounts of ice are required to control the reaction rate and maintain the activity of the organism. Flake ice is hygienic and clean, with fast cooling speed, and is the most ideal cooling carrier in this industry.
Concrete mixing: Flake ice is directly used as the source of water in concrete mixing, and the proportion is up to 80%. It can provide efficient and controllable cooling effect. Concrete stirred at a constant temperature will not crack due to physical deformation caused by temperature, thus ensuring the quality and safety of the project. The flake ice concrete cooling system is widely used in high-quality large-scale projects around the world, such as large dams, high-grade highways, high-rise buildings and nuclear power plant construction projects, etc…
Chemical dyes: With the rapid development of the chemical product processing industry, the market’s requirements for the quality and process of chemical products continue to increase. Due to the physical properties of ice, the application of ice in the chemical industry is determined to continue to expand. In the production and synthesis process of azo reactive pigments and dyes, diazotization, coupling and condensation are necessary synthesis processes for production. Due to the release of diazotization, coupling and condensation A large amount of heat is generated, and the ideal reaction conditions should be 0-5 degrees Celsius, so a large amount of ice must be added to cool the chemical reaction to control the temperature to ensure the quality of the product.
Operation principle of flake ice machine
Flake ice machine vertical evaporator
Flake ice The machine evaporator is a vertically erected barrel structure, which consists of the main components of ice making, the ice blade, the main shaft, the sprinkler tray, and the water tray. Driven by the reducer, they slowly rotate counterclockwise.
The principle of ice making
Water enters the water distribution tray from the water inlet of the evaporator of the flake ice machine, and the water is evenly sprinkled on the evaporator through the sprinkler pipe. On the inner wall of the evaporator, a water film is formed; the water film exchanges heat with the refrigerant in the flow channel of the evaporator, the temperature drops rapidly, and a thin layer of ice is formed on the inner wall of the evaporator. Fall into the freezer from the ice drop port. Part of the unfrozen water is returned from the return port to the cold water tank through the water receiving tray, and passed through the cold water circulation pump. [3]
Ice Cycle
Through the replenishment valve, the water automatically enters a water storage tank, and then the water is pumped through the flow control valve to the To the diverter head, where the water is sprayed evenly on the surface of the ice maker, flowing across the wall of the ice maker like a curtain of water, the water is cooled to the freezing point, and the water that is not frozen by evaporation will flow into the water storage tank through the porous groove , to restart the cycle.
Ice mining cycle
When the ice reaches the required thickness (normally, the thickness of ice is 1.5-2.2MM), discharge the compressor The hot air is re-introduced back into the ice maker clip wall to replace the low-temperature liquid refrigerant. This forms a thin film of water between the ice and the wall of the evaporation tube, which will lubricate the ice as it falls freely into the groove below by gravity. The water produced during the ice harvest cycle will be returned to the water storage tank through the porous tank, which also prevents the wet ice from being discharged by the machine.
Refrigerator condenser
Available with air-cooled, water-cooled or evaporative condensers. The evaporative type is installed above the ice machine, the water-cooled condenser is installed under the ice machine or under the refrigeration system, and the air-cooled condenser can be installed together with the ice machine according to the actual situation. It can also be installed outdoors. If desired, water-cooled condensers can be used on ships or on shore, using seawater for cooling. Evaporative cooling can be used when the ambient air temperature is high, but from the perspective of efficiency and economy, it is not suitable for water-cooled or air-cooled refrigeration.
