The cooling water circulation machine is a water cooling device, and the cooling water circulation machine is a cooling water device capable of providing constant temperature, constant current and constant pressure. The working principle of the cooling water circulation machine is to inject a certain amount of water into the water tank of the machine first, and then cool the water through the chiller refrigeration system, and then the low-temperature cooling water is sent to the equipment to be cooled by the water pump, and the chilled water of the cooling water circulation machine takes the heat away. The temperature rises and then flows back to the water tank to achieve the cooling effect. The cooling water temperature can be adjusted automatically according to requirements, and long-term use can save water. Therefore, the cooling water cycle machine is a standard energy-saving device.
Cooling principle of the cooling water cycle machine:
The operation of the cooling water cycle system is through three interrelated systems: a refrigerant circulation system, a water circulation system, and an electrical control system.
Cooling water cycle machine refrigerant circulation system:
The liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. Finally, a certain temperature difference is formed between the refrigerant and the water. The liquid refrigerant is completely evaporated to a gaseous state and then sucked and compressed by the compressor. The gaseous refrigerant passes through the condensation. The device absorbs heat and condenses into a liquid, which is throttled by the thermal expansion valve and becomes a low-temperature low-pressure refrigerant to enter the evaporator to complete the refrigerant cycle.
Cooling water cycle machine refrigeration system basic composition:
Compressor: The compressor is the core component of the entire refrigeration system and the source of refrigerant compression. Its function is to convert the input electrical energy into mechanical energy to compress the refrigerant.
Condenser: The condenser acts to output thermal energy and condense the refrigerant during cooling. After the high-pressure superheated steam discharged from the refrigeration compressor enters the condenser, all the heat absorbed by the working process, including the heat absorbed from the evaporator and the refrigeration compressor and in the pipeline, is transferred to the surrounding medium; The refrigerant high pressure superheated vapor recondenses into a liquid.
Reservoir: The reservoir is installed after the condenser and is in direct communication with the drain of the condenser. The refrigerant liquid in the condenser should flow unimpeded into the reservoir so that the cooling area of ​​the condenser can be fully utilized. On the other hand, when the heat load of the evaporator changes, the required amount of the refrigerant liquid also changes, and at that time, the reservoir functions to regulate and store the refrigerant. For a small chiller refrigeration system, the reservoir is often not installed, but a condenser is used to adjust and store the refrigerant.
Drying filter: In the chiller refrigeration cycle, it is necessary to prevent the ingress of moisture and dirt. The source of moisture is mainly the amount of water contained in the newly added refrigerant and lubricating oil, or the air entering due to the maintenance of the system. Moisture. If the moisture in the system is not cleaned out, when the refrigerant passes through the throttle valve, the moisture will solidify into ice due to the pressure and temperature drop, which will block the passage and affect the normal operation of the refrigeration unit. Therefore, a dry filter must be installed in the cooling water circulating machine cooling system.
Thermal expansion valve: The thermal expansion valve is both a flow regulating valve in the chiller refrigeration system and a throttle valve in the refrigeration device. It is installed between the drying filter and the evaporator in the refrigeration device, and its temperature sensing package It is wrapped at the exit of the evaporator. Its main function is to reduce the pressure of the high-pressure normal temperature refrigerant liquid when flowing through the thermal expansion valve, and become the low-temperature low-pressure refrigerant wet steam entering the evaporator, vaporizing and absorbing heat in the evaporator, and achieving the purpose of cooling and cooling.
Evaporator: An evaporator is a heat exchange device that relies on the evaporation of a refrigerant liquid to absorb the heat of the cooled medium. Its function in the refrigeration system is to absorb heat. In order to ensure a stable and long-lasting evaporation process, the vaporized gas must be continuously withdrawn by a refrigeration compressor to maintain a certain evaporation pressure.
Refrigerants: Most industrial chillers used in modern industry use R22 or R12 as refrigerant. Refrigerant is a working fluid in a refrigeration system. Its main function is to carry heat and achieve heat absorption and heat release when the state changes.