The air conditioner in the machine room is mainly composed of six parts:
1. Control and monitoring system
The control system displays the air temperature and humidity, the working state of the air conditioning unit, analyzes the signal returned by the sensor, and sends work instructions to each functional item of the unit, so as to achieve the purpose of controlling the air temperature and humidity. The compressed air of the cabinet air conditioner flows through the scroll tube and becomes cold and hot air flow. The hot air flow is discharged at a slightly higher pressure through the vortex tube exhaust device, and the cold air flow is led into the heating part in the case through the diverter to reduce and stabilize the internal temperature of the case, while the external air will not enter the case. Outdoor cabinet is suitable for outdoor environment, such as the cabinet installed on the side of the road, park, roof, mountain area and flat ground. Base station equipment, power equipment, battery, temperature control equipment, transmission equipment and other supporting equipment can be installed in the cabinet, or installation space and heat exchange capacity can be reserved for the above equipment, which can provide reliable mechanical and environmental protection cabinet for the normal operation of internal equipment.
2. Ventilation system
Various functions (refrigeration, dehumidification, heating, humidification, etc.). When the unit processes the air in the machine room, the air flow is required to complete the heat exchange, and the gas in the machine room also needs to maintain a certain flow to prevent dust deposition and timely remove the dust suspended in the air.
3. Refrigeration cycle system and dehumidification
The evaporation compression refrigeration cycle system is used to make use of the evaporation latent heat absorbed in the process of refrigerant evaporation for refrigeration. Refrigerant is the working medium of air conditioning refrigeration system to realize refrigeration cycle, and its critical temperature increases with the increase of pressure. Using this feature, the refrigerant gas is compressed into high temperature and high pressure gas by the work of the compressor, and then sent to the condenser. When it is cooled under high pressure, the gas will dissipate heat and condense into liquid under high temperature. The high-pressure refrigerant liquid flows through the throttling device, making the pressure drop rapidly, and then reaches the lower pressure and temperature in the evaporator to boil.
The basic refrigeration system consists of compressor, evaporator, condenser and expansion valve.
Dehumidification systems usually use their own refrigeration cycle system, using the same cooling capacity to reduce.
4. The electrodes of the humidification system are humidified by means of water formed by steam heating, humidification tank or infrared lamp, and other equipment.
5. Heating system is used as heat compensation, and heating is mainly in the form of electric heating pipe.
6. Water (glycol) circulating system of water cooling unit
The unit's internal set of water cooled condenser unit, the circulating water through the heat exchanger, refrigerant vapor cooled and condensed into liquid, because the heat capacity of the water, so small volume of condensing heat exchanger, water according to different adjustable pressure control the 3-way valve (pos. No. (or the temperature of the electric control valve by the quantity of heat exchanger of the condensation of water pressure to control.Through the circulating pump to provide power, water is heated, several commonly used the cooler, the cooling of dry, dry and cold water to the closing coil, overcome reduction and cooling fan dry cooler stability, high reliability, but it needs - cooling coils and fan larger volume have an open cooling, that is, the cooling water spray tower "itself after evaporation heat returns, this way need to constantly replenish water into the system and demands of demineralized water, dust and other debris in the air will be in severe cases it may clog pipe into the system, affect the heat transfer, so you need to disinfect regularly.
