Screw type refrigeration equipment | screw refrigeration system produced by Shenzhen city chuanben Munster refrigeration equipment Co. ltd.:
Chuanben chiller series:
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Chuanben Industrial Chiller
Screw screw screw refrigeration equipment | screw chiller, chiller, chiller, chiller, cooling water machine Shenzhen Co. Ltd., chiller plant, industrial cold water machine, ice machine, cold water machine, cold water machine, electroplating mold | water-cooled screw chiller, air-cooled screw chiller | air-cooled cold water machine, water cooled chillers in Shenzhen chuanben Munster refrigeration equipment Co. ltd.. Screw type refrigeration cycle equipment, screw type refrigerating unit
Screw type refrigerating machine because of its key components - screw compressor using named screw chiller, gas refrigerant from the evaporator of the state as a unit; after the compressor adiabatic compression, a high temperature and pressure. The gas refrigerant is compressed, in the condenser, isobaric cooling condensation, change into liquid refrigerant is condensed, and then expanded to low pressure through the throttle valve, gas-liquid mixture into. The liquid refrigerant in the evaporator is absorbed by the heat of the cold matter, and becomes a gaseous refrigerant. Gaseous refrigerant through the pipeline to re-enter the compressor, the beginning of a new cycle. This is the four process of the refrigeration cycle. Is also the main working principle of screw type water chiller.
Compression principle:
The process of breathing gas through the suction port into the rotor slot. With the rotation of the rotor, and the rotor slot wheel turn into meshing state, gas enters into the compression chamber (closed space formed by the rotor slot surface, the cavity of the housing and wheel tooth surface). 　　
Compression process: with the rotation of the rotor, the compression chamber volume decreases, the gas with the compression to the compression chamber front to the exhaust port. 　　
Exhaust process: the front of the compression chamber is transferred to the exhaust port to start the exhaust, and then complete a work cycle. Because of the star wheel symmetrically, two compression occurs in circulation per rotation, the corresponding displacement is two times the cycle exhaust volume.
Application of screw type refrigeration unit
Compared with the vortex type, the power of screw refrigeration unit is mainly used in the central air-conditioning system or large industrial refrigeration
Classification of screw type refrigeration units:
Screw type refrigeration unit according to the different cooling ways can be divided into water cooled screw type chiller and air cooled screw chiller
Selection of screw type refrigeration unit
The main control parameters of the 1 screw chiller are refrigeration performance coefficient, the amount of custom cooling capacity, input power and the type of refrigerant. 2 the selection of chiller should be considered according to the cold load and its application. For the refrigeration system with long time in low load operation condition, it is better to use the multi head piston compressor unit or screw compressor unit, which is convenient for adjustment and energy saving. 3 when the water chiller is used, the unit with higher performance is given priority to. According to the statistics, the average running time of the cold water chiller under 100% load is about 1/4 of the total running time in the whole year. The total running time of 100%, 75%, 50% and 25% load is roughly 2.3%, 41.5%, 46.1%, 10.1%,, and. Therefore, in the selection of chiller should give priority to the efficiency curve is relatively flat models. At the same time, the adjustment range of the cold water unit load should be considered in the design selection. The partial load performance of multi head screw type water chiller is excellent, which can be chosen according to the actual situation. 4 when selecting the cold water unit, we should pay attention to the conditions of the nominal working conditions. The actual cooling capacity of the chiller is related to the following factors: a) the water outlet temperature and flow rate; b) the water inlet temperature, flow rate and fouling factor. 5 when selecting the cold water unit, we should pay attention to the normal operating range of the model unit, the current limit of the main motor is the current value of the shaft power under the nominal condition. 6 in the design selection should pay attention: in the nominal working conditions, the outlet temperature of the cold water should not exceed 15 degrees Celsius, air cooling unit outdoor dry bulb temperature should not exceed 43. If it must be more than the above range, should be aware of the use of the compressor is allowed, the main motor with the power is sufficient.
The maintenance of the screw type cold water machine
Screw type cold water machine maintenance one, screw type cold water machine installation is completed or after long-term use, cooling rate should be reasonable: every day to control in 8-10. Two, screw chillers in the hangar maintenance, attention should be paid attention to the hard object collision of library body and scratching in use. Because it can cause the depression and corrosion of the library board, it will make the local thermal insulation performance of the reservoir reduced. Three, screw chiller sealing parts and maintenance, because the assembly type screw chiller is composed of a plurality of insulation board together, so there is a certain gap between the board, in the construction of these cracks will be sealed with sealant, to prevent air and water into the. So in the use of some of the sealing failure of the site in time to repair. Four, screw chiller floor maintenance, small prefabricated screw chiller floor insulation board, the use of screw chiller should be to prevent the ground there are a lot of ice and water, if there is ice, cleaning must not use rigid thing.no, damage to the floor. Maintenance of screw type cold water machine one, screw type cold water machine in addition to mold sterilization and disinfection screw type chiller cold storage of cookingMaterials and food products contain a certain amount of fat, protein and starch. The presence of these nutrients will cause a large number of fungal and bacterial reproduction and growth. To do that cold health management, ensure food and cooking raw food quality, to regularly carry out cold disinfection. In addition to the mold and disinfection of the screw type water chiller, the first use of acid disinfectant. The bactericidal action of the acid disinfectant is mainly the protein in the coagulation cell. Commonly used disinfectant has lactic acid, peroxide has acid, bleaching powder, Faure Marin, etc.. Two, screw chiller in removing peculiar smell odor, 1 screw chiller in the cause of the so-called smell, namely cooking material screw chiller in food and under the influence of external factors, the change of physical chemistry, produces an abnormal odor, day long time, this kind of smell adhere to the screw chiller walls, ceiling and equipment and tools. Screw type cold water machine to produce peculiar smell, generally speaking, there are the following reasons: screw type cold water machine before entering the food there is a kind of peculiar smell. Before entering the screw type water cooler, there are corrupt and bad phenomenon, such as bad eggs, meat, fish and so on. The screw type cold water machine for storing the fish has not been cleaned and stored meat, eggs, fruits and vegetables, etc., causing the odor to infect and deteriorate. Screw type cold water machine ventilation is poor, temperature, humidity is too large, resulting in a large number of mold reproduction, produce mildew smell. Screw type chiller cooling pipe leakage, refrigerant (ammonia) erosion into the food causing odor generation. Screw chiller temperature does not drop, resulting in deterioration of corruption tainted meat flavor. This situation occurred in the meat without freezing, through to storage. Different smell of food there is a screw type cold water machine warehouse, leading to food series and taste each other infection. 2, to prevent the screw type cold water machine odor generation method into the screw type cold storage of food, must be tested, there is no deterioration of storage. Screw type cold water machine warehouse before the stock does not have the presence of odor. If there is odor, must be processed by the technology, to remove the smell before use. Usually to strengthen the maintenance of refrigeration equipment, is strictly prohibited. Unloading, prevent pipeline leakage caused by refrigerant so smashed. Food in the cold process, must make the screw type cold water machine warehouse to maintain a certain temperature, the frozen food can not be transferred to the library or storage. If the screw type cold water machine warehouse temperature drop does not come down, should find the reason, to be excluded after the processing of food. Screw type cold water machine can not be mixed with each other to store the food.
Water cooled screw type cold water machine parameter table 1 (single machine head)
Description: 1 nominal refrigeration capacity: the evaporator inlet / outlet temperature of 12 C /7 C; the condenser water inlet and outlet temperature is 30 /35.
2 frozen water outlet temperature adjustment range: 7-15.
3 cooling water inlet temperature range: 15-30
Water cooled screw type cold water machine parameter table two (single machine)
Description: 1 nominal refrigeration capacity: the evaporator inlet / outlet temperature of 12 C /7 C; the condenser water inlet and outlet temperature is 30 /35.
2 frozen water outlet temperature adjustment range: 7-15.
3 cooling water inlet temperature range: 15-30
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