Matching Analysis And Study Of JS6608 Vehicle Air Condition

As China's passenger car industry's rapid development and people's material living standards, people on the passenger comfort are rising ever higher. As the impact on passenger comfort of one of the important components, passenger car air-conditioning system to maintain indoor air temperature, humidity, speed, cleanliness and so on thermal comfort in the framework of standards is not only conducive to the protection of staff by Secretary of the physical and mental health and enhance their work Efficiency and quality of life, but also on the increase in car security have a positive effect. As a result, passenger car air-conditioning systems in passenger cars on the use of more and more popular, and has gradually become a standard passenger car components. Whether by the Secretary to provide a pleasant and safe use of the environment, air-conditioning system depends largely on the good or bad. Therefore, to design high-energy, high-performance passenger car air-conditioning systems in order to make full use of resources, not consume too much power, and so reasonably priced car.Vapor compression refrigeration is usually used as car air-conditioning system. It is the use of chilling effect when the liquid refrigerant absorbs heat of vaporization. Refrigeration system, the refrigerant in a different state in a confined circulation system, each cycle is divided into four basic process: the process of compression, heat, cutting process, the process of absorption of heat. Through the cycle of refrigerant, the temperature inside the vehicle remains at a comfortable state.Because of this the bus companies to install air-conditioning systems are used to estimate the experience of the law, lack of the necessary analysis of the performance, it often is not satisfied with the refrigeration. In response to this problem, this article JS6608-air-conditioned bus to the built-in refrigeration and air-conditioning system for the study through the air-conditioning systems in passenger cars in the design process for passenger cars and air-conditioning system performance analysis, design and a vehicle matching the air-conditioning system.First of all, steady-state heat transfer calculation was study on the bus body. As the bus air-conditioning working conditions, the body envelope less storage capacity, and more transparent structure, the bus air-conditioning cooling load is generally in accordance with the selection of a passenger car for heat. Therefore, the air-conditioned bus or heat load design is selected on the basis of passenger car air-conditioning unit. Air-conditioned buses in the external environment, due to higher than the temperature inside the vehicle, together with solar radiation, there are a lot of heat through the car windows and walls of glass into the car; closed due to bad, there will be a lot of hot air through the Doors and windows and cracks on the floor leaking into the car, a new hot wind; the human body will also distribute the heat inside the vehicle height and temperature; through the hood will be the engine room from some of the heat; ventilation system was produced by heat; as well as instruments, Equipment, lighting, heat and so on, all of which form the heat and the air-conditioned bus load of heat. According to the formula calculated JS6608 air-conditioned bus for the heat load 11656W, the actual selection of air-conditioning system of cooling capacity = 1.1×11656 = 12822W. Check the air-conditioning system cooling capacity = 13000W. The bus body heat load calculation, contribute to the understanding of the various parts of a thermal heat load in proportion to improve the working environment, air conditioning, car air-conditioning system to reduce the load direction.The matching selection of air-condition compressor. Motor vehicle air-conditioning compressor is the heart of the air-conditioning refrigeration system, which plays a refrigerant compression and transmission to ensure the normal work of the refrigeration cycle. According to the air-conditioning refrigeration, air-condition bus on JS6608 refrigeration system thermodynamic cycle analysis to calculate the theoretical air-conditioning compressor gas volume. The theory corresponding to the amount of gas compressors are several performance analysis and comparison to determine JS6608 bus air conditioning system compressor model chosen for the Nanjing Aotecar WX-32 compressor.The matching designal calculations of air-conditioning heat exchangers. The car air-conditioning heat exchangers, including condensers and evaporators, which are automotive air-conditioning systems in two important components, and their role in the realization of two different temperature of the fluid exchange between the heat, heat exchanger performance of a direct impact on the car The air-conditioning cooling performance. Condenser in the calculation of the design process, the condenser should be subject to the work under the steady-state thermal balance, that require refrigeration system condenser heat load through the condenser of a heat transfer, the air was taken away by the heat of the three must Balance. According to the condenser and then determine the structure parameters JS6608 calculated bus air-conditioning condenser system required for the heat transfer area A0 = 7.2m2, the required length of flat tube L = 12.145m, condenser appearance of the long size×wide = 1.0m×0.26m. In the design evaporator in the process of calculation, should be subject to evaporation in the work under the steady-state heat balance, that is, the refrigeration system requirements for the evaporator heat, the refrigerant to absorb heat, heat the air out of the three must be maintained. Then according to evaporators to determine the structure parameters JS6608 calculated bus air-conditioning system evaporator heat transfer area required A0 = 25.82m2, the evaporation needed for the length of the tube L = 62.2m, evaporator appearance size of a long×wide = 1.3m×0.20m. According to the results, the match performances of condenser, evaporator and compressor were analyzed respectively. By matching the air-conditioned bus JS6608 Design, the design of passenger car air-conditioning system has a clearer idea of development. However, there are still many shortcomings, so in the future work and study in the need to continue to enhance and improve in order to design a more performance to match the passenger car air-conditioning system.