Ice Maker 2
En son güncellendiği tarih: 8 Tem 2020
Built-in and independent ice makers
Built-in ice makers are designed to fit under a kitchen or bar counter but can be used as stand-alone units. Some produce ice-like crescent-shaped ice from a freezer ice maker; The ice is cloudy and opaque instead of clear because water freezes faster than others, which are light ice cubes. In this process, small air bubbles get stuck and cause the cloudy appearance of the ice. However, most of the under-counter ice makers are open ice makers where ice misses air bubbles, and therefore ice is clear and melts much slower.
Industrial ice makers
Commercial ice makers improve the quality of ice by using moving water. Water is passed through a stainless steel evaporator with high nickel content. The surface should be below the freezing point. Saltwater requires lower temperatures to freeze and last longer. It is often used to pack seafood. Air and undissolved solids will be washed in horizontal evaporator machines to remove 98% of water solids and to obtain very hard almost pure, clear ice. In vertical evaporators, ice is softer, more often if there are real individual cube cells. Commercial ice machines can make different sizes of ice, such as vials, crushed, cube, octagon, and tube.
When the ice sheet on the cold surface reaches the desired thickness, the sheet is shifted on a wire rack, where the weight of the sheet breaks into the desired shapes, then falls into a storage compartment.
Flake ice is made from a mixture of brine and water (maximum 500 g [18 oz] salt per ton of water), in some cases, it can be made directly from brine. Thickness from 1 to 15 mm (1 (16 and 9⁄16 inches), irregular shape with a diameter of 12 to 45 mm (1⁄2 to 1 3⁄4 inches).
The evaporator of the flake ice machine is a vertically placed drum-shaped stainless steel container equipped with a rotary blade that rotates and draws ice from the inner wall of the drum. While running, the main shaft and blade are turned counterclockwise by the reducer. Water is sprayed from the sprinkler; the water on the inner wall consists of saltwater and ice. The lower water tray catches cold water as it deflects Ice and returns it back to the reservoir. The crankcase usually uses a float valve to fill as required during production. Chippers tend to form an ice ring under the drum. Electric heaters are located at the bottom of the wells to prevent this accumulation of ice where the breaker does not reach. Some machines use scrapers to help with this. This system uses a low temperature condensing unit; like all ice machines. Most manufacturers also have an E.P.R.V. (Evaporator pressure regulating valve.)
Seawater flake ice machine can make ice directly from seawater. This ice can be used for the rapid cooling of fish and other seafood. The fishing industry is the largest user of flake ice machines. Flake ice can lower the temperature of cleaning water and seafood, so it resists the growth of bacteria and keeps seafood fresh.
It is also applied in the storage and transportation of vegetables, fruits, and meat due to its wide contact and less damage to chilled materials.
When baking, while mixing flour and milk, flake ice can be added to prevent the flour from rising on its own.
In most biosynthesis and chemosynthesis, flake ice is used to control the reaction rate and maintain viability. Flake ice sanitary, clean with rapid temperature reduction effect.
Flake ice is used more than 80% by weight as a direct water source in the concrete cooling process. Concrete is not cracked if it is mixed and poured at constant and low temperature.
Flake ice is also used for artificial snowfall, so it is widely applied in ski resorts and amusement parks.
Cube ice maker
Cube ice machines are classified as small ice machines, unlike tube ice machines, flake ice machines, or other ice machines. Common capacities range from 30 kg (66 lb) to 1,755 kg (3,869 lb). Since the ice cube machines appeared in the 1970s, they have evolved into a wide range of ice machine families.
Cube ice machines are generally seen as vertical modular devices. The top is an evaporator and the bottom is an ice bucket. The refrigerant circulates inside the independent evaporator pipes where it exchanges heat with water and freezes the water into ice cubes [more explanation needed]. When the water is completely frozen in ice, it is automatically released and falls into the ice chamber.
Ice machines may have a self-contained cooling system, where the compressor is placed in the unit, or a remote cooling system where the cooling components are elsewhere, usually on the roof of the work.
Most compressors are either positive displacement compressors or radial compressors. Positive displacement compressors are currently the most efficient compressor type and have the greatest cooling effect (400–2500 RT) per single unit [more explanation needed]. They have a wide range of possible power supplies and can be 380 V, 1000 V or higher. The principle behind positive displacement compressors uses a turbine to compress the coolant to high-pressure steam. Positive displacement compressors are of four main types: screw compressor, rolling piston compressor, piston compressor, and rotary compressor.
Screw compressors can provide the greatest cooling effect among positive displacement compressors, with cooling capacities normally ranging from 50 RT to 400 RT [more explanation required]. Screw compressors can also be divided into the single screw and twin screw types. The twin-screw type is more common in use because it is very efficient. 
Rolling piston compressors and piston compressors have similar cooling effects and the maximum cooling effect can reach 600 kW. [More explanation needed]
Reciprocating compressors are the most common compressor type because the technology is mature and reliable. Refrigerant effects are between 2.2 kW and 200 kW. [More explanation needed]
They compress the gas using a piston that is pushed by a crankshaft.
Rotary compressors, mainly used in air-conditioning equipment, have a very low cooling effect, which normally does not exceed 5 kW. They operate by compressing the gas using a piston pushed by a rotating rotor in an isolated chamber.
All condensers can be classified into one of three types: air cooling, water cooling, or evaporative cooling.
An air cooling condenser uses air as the heat-conducting medium by blowing air from the surface of the condensers, which removes heat from high pressure, high-temperature refrigerant vapor.
A water cooling condenser uses water as the heat-conducting medium to cool the refrigerant vapor into the liquid.
An evaporative condenser cools the refrigerant vapor using the heat exchange between the evaporator pipes and evaporated water sprayed on the surface of the pipes. This type of condenser can operate in hot environments; they are also very efficient and reliable.
Tube ice generator
A tube ice generator is an ice maker where water is frozen in vertically elongated tubes in a surrounding enclosure (freezing room). At the bottom of the freezer compartment is a distribution plate that surrounds the tubes and is attached to the separate compartment where hot gas is passed through to heat the pipes and cause the ice bars to slide down.
In cooling processes such as tube ice, temperature control, fresh fish ice cream, and beverage bottle ice cream