In refrigeration system, evaporator, condenser, compressor and throttle valve are the four essential parts in refrigeration system, in which the evaporator is the equipment of conveying cold quantity. The refrigerant absorbs the heat of the cooled object to achieve refrigeration. The compressor is the heart, which plays the role of inhaling, compressing and transporting refrigerant vapor. The condenser is the device that emits heat, and the heat absorbed in the evaporator is passed along with the heat transferred by the compressor work.
Pass the cooling medium away. The throttle valve acts as a throttle to the refrigerant and controls and regulates the amount of refrigerant liquid flowing into the evaporator, and divides the system into two parts: High pressure side and low pressure side. In the actual refrigeration system, in addition to the above four large, there are often some ancillary equipment, such as solenoid valve, distributor, dryer, collector, fusible plug, pressure controller components, they are to improve the operation of the economy, reliability and security set.
Air conditioners can be divided into two types: water-cooled and air-cooled, according to the use of the purpose can be divided into single cooling and refrigeration heating type, no matter what type of composition, are composed of the following main components.
The necessity of condenser is based on the second law of thermodynamics--according to the second law of thermodynamics, the direction of spontaneous flow of heat energy inside a closed system is unidirectional, that is, it can only be from high fever to low heat and microscopic particles in microcosm to carry thermal energy can only be ordered into disorder. Therefore, a heat engine in the energy input work at the same time, downstream must also have energy release, so that the upper and lower travel will have a thermal gap, heat flow will become possible, the cycle will continue.
So, if you want to get the load back to work, you must first release the heat that is not completely released, and then you need to use the condenser. If the ambient heat is higher than the temperature in the condenser, in order for the condenser to cool down, it must be done artificially (generally using the compressor). The condensed fluid returns to a state of high order and low heat energy and can be done again.
The selection of the condenser includes the selection of the form and model and determines the flow and resistance of the cooling water or air flowing through the condenser. The choice of condenser type should consider the local water source, water temperature, climatic conditions, as well as refrigeration system total refrigeration capacity and the size of the refrigerator room layout requirements. The heat transfer area of the condenser is calculated according to the condensing load and the heat load of the condenser unit area, in order to select the type of condenser.