Not only is the cold water machine industry, in fact, the operation of a lot of machinery and equipment in the industry are inseparable from the role of the control protector. These devices are assembled from different parts of each other, there will be a different pressure range between parts and accessories. To reduce the impact of the pressure of the chiller performance, users should regularly detect the control and protection unit, cold water machine, cold water machine to ensure the operation and safety of the control protection within the scope of influence to help the chiller effectively away from fault types. East Star Refrigeration Xiaobian today to share with you is the screw type chiller control of the protection of the role of specific equipment in the chiller:
1, high pressure controller: located in the cold water compressor exhaust pipe, when the pressure exceeds the set value, the high voltage controller cut off the circuit, so that the compressor stops running, so as to achieve automatic protection. High voltage set value is 16kg/cm2.
2, low voltage controller: located in the suction pipe of the compressor, when the pressure is lower than the set value, the low voltage controller cut off the circuit, when the pressure is higher than the set value, the circuit is connected. Low pressure controller can be used as an automatic safety protection to prevent the evaporation pressure is too low when the cooling liquid is frozen; or to prevent the cold water compressor compressor in the suction pressure is too low state (usually there is a fault) run. Setting value is 3.2kg/cm2.
3, oil temperature controller: oil temperature directly affects the viscosity of lubricating oil, thus affecting the effect of separation of oil. Therefore, the temperature controller is used to control the oil temperature. When the oil temperature is higher than 70 DEG C, the oil temperature controller can stop the compressor.
4, oil pressure difference controller: when the oil pressure is higher than the exhaust pressure of 2 kg / cm of force, the compressor can run, and less than 1.5 kg / cm, when the compressor stops running, and the pressure of the oil is not more than 2. The oil pressure controller itself has a 45 - to 60 second delay mechanism to ensure the normal start of the compressor.
5, lubricating oil filter differential pressure controller: lubricating oil filter pressure difference between the inlet and outlet is the size of the lubricating oil filter clogging a degree of reflection, the greater the pressure, that lubricating oil fine filter clogging worse, when the pressure reaches 1kg/cm2, the degree of blockage of lubricating oil filter the device will do harm to the fuel supply system, then it should stop screw chiller, the lubricating oil strainer after cleaning, and then put into use.
6, cold water outlet temperature controller: cold water temperature controller to control the outlet temperature higher than 2 DEG C, avoiding running under low load and to prevent accidents such as Donglie evaporator.
7, safety valve: when the pressure controller failure, high side pressure system increased to 18 kg 2 cm, in order to prevent the pressure continues to rise due to destructive accidents, the safety valve will automatically jump from high pressure refrigerant into the low pressure part.
In addition, DX East Star Series chiller with compressor overload protection, low protection, water flow switch protection, Y delta failed to start protection, high exhaust temperature protection, compressor overload protection, power failure memory function, frequent start stop protection, voltage protection, low oil level abnormal protection, high and low voltage protection protection function etc..
For more information please contact us: Mr. Wang 13923464030 Tel: 0755-81715045 or visit our website: http://www.szdxj.com