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The evaporator of block ice making machine is divided into a coil type evaporator and a shell and tube type evaporator.
Shell and tube evaporators are divided into horizontal shell and tube evaporators and dry shell and tube evaporators.
Horizontal shell and tube evaporator is one of the main forms of refrigeration equipment used to cool water or brine. This kind of evaporator generally evaporates the refrigerant liquid outside the tube, and the refrigerant (water or brine) flows in the tube. When working, the shell should be filled with a considerable amount of refrigerant liquid. Generally, the height of the static liquid level is about 70% to 80% of the shell diameter, so it is also called a flooded evaporator. The evaporated vapor is drawn from the upper part. . The inlet and outlet of the refrigerant (water or salt water) are set on the same end cover and flow in from below, flow back and forth through the evaporator tube and end cover many times, and then flow out from above.
The dry shell-and-tube evaporator is a method where the liquid refrigerant enters the tube pass from the end cap at one end of the evaporator after throttling. The end cap is cast with a partition, and the refrigerant evaporates and absorbs the refrigerant through two or more processes After the heat comes out of the same end cover, it enters the compressor. If the spacer of the end cover leaks, the refrigerant will be short-circuited, resulting in liquid backflow and decreased cooling capacity. Dry shell-and-tube evaporators are generally made of copper tubes, and can be smooth tubes or internal fin tubes with longitudinal fins.
Then we will look at the meaning, application and characteristics of the coil evaporator
Coil type evaporator adopts copper core coil form to separate the evaporator system. Various shapes of evaporator can be arranged in a limited space, which maximizes the heat exchange area in a very small space. Application and cooling of liquids such as oil tanks and water tanks. Due to the spiral shape, the heat exchange area of a single system can be more than 14 square meters, and the heat transfer coefficient can reach K≥3000W/㎡℃, and at the same time, due to the continuous scouring of the evaporated fluid The tube can float freely, expand and contract freely, so it is not easy to scale. If a small amount of water (oil) scale is accumulated during long-term use, the expansion of the tube will realize automatic descaling, so the long-term use of heat exchange capacity will decrease It is not too obvious and the heat exchange effect is good. Scope of application
Coil type evaporators can be widely used in industrial and civil applications, such as organic chemical synthesis temperature control, oil refining temperature control, high-end hotels, restaurants, office buildings, school scientific research buildings, outpatient wards and other buildings in heating, air conditioning, hot water supply systems Evaporative heat exchange equipment is used in boiler room, heat exchange station room, and air conditioning machine room.
Coil evaporator features
(1) The use of a new structure of floating coiled tube bundle improves the heat transfer capacity and at the same time greatly improves the automatic descaling capacity;
(2) The tube bundle can be connected by live joints, which reduces the number of welding points and makes maintenance more convenient;
(3) Compact structure, small volume, and less floor space.
CBFI® block ice making machine provide customers with coil-type evaporator ice machines, which not only have a large heat exchange area and good cooling effect, but also are energy-saving compared to the shell and tube type.