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 Wysłany: Pon 0:32, 20 Gru 2010 Temat postu: ugg milano Car air conditioning system and its con |
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Car Air Conditioning System and Its Control
After the electromagnetic clutch pull operation, the electromagnetic clutch coils, the electromagnetic suction, plate pull the belt drive, belt driven compressor drive shaft will rotate through the plate. Electromagnetic clutch power or not, by the pressure switch control, for some reason when the system pressure is too high a result, the pressure switch the compressor off the electromagnetic clutch circuit, when the system due to leakage caused by low pressure is too low and other reasons, the same cut off compressor operation. These are the most basic car air-conditioning control system, it is not advanced, because there are some problems with pressure switch, such as when they are inserted into the system piping may result in leakage of refrigerant pressure switch j low efficiency, only when 8O% of the refrigerant has leaked, the low pressure switch to cut off the compressor. In addition, 22 57 2 fluid mechanical pressure switch is formed by a number of moving parts, such as contacts, springs and diaphragm, they all have errors, when the pressure switch is used, the resulting error will increase, because the system The oil will change the flexibility of the diaphragm, so that contact occurs inequality, in fact, if the system is designed to be evaporating temperature of 0. C, cut off the compressor, back up to 6. C, connected to the compressor, if the pressure switch error (8 ~ 10) range, the system will be in the evaporation temperature for a 2 +2. C between the shutdown, the +4 +8. C Q start,[link widoczny dla zalogowanych], the result inefficient compressor operation, stopping frequently to open. 3.2 Automatic air-conditioning system control, automatic air conditioning system eliminates the need for a pressure switch, the use of electronic throttle control methods to monitor the air conditioning,[link widoczny dla zalogowanych], cooling system pressure and operation of the compressor and condenser fan, 6 thermal sensors were placed in the evaporator , condenser pipes, the new outlet, car interior, solar radiation at the tank and the engine cycle, shown in Figure 7. Figure 7, automatic air conditioning system 1 car port switching valve of a heating; 2. Damper; 3. Evaporator; 4. Xiao Shi sense of the evaporator; 5. Heating clamor; 6. Throttle switch; 7. Feng Shi Xiao Mount painting; 8. Shi insolation sensor; 9. Feng machine; lO. Compressor; n. Potentiometer; 12. Double vacuum potassium; l3. Servo mechanism; 14. Valve; 15, a vacuum valve; 16. Blower servo; 17. Vacuum valve; l8. Net boat toxic exhaust page boy din; 19, vacuum valve; 20. Plating computed; 21. Program switch Yuan temperature setting switch; 22. Xiao Shi Lane temperature; 23. New Feng Xiao Chuan Sheng; 24. Automatic air conditioning heating din throttle control with micro-computer, capable of automatic temperature control, air volume control, control the operation of the air flow control. Micro-computer to receive and calculate the various sensor input signals to calculate, compare, judge, issue a control signal. It is based on the sensor sensing the temperature inside the vehicle to continue to adjust the air conditioning blew out of the air temperature and air volume, and in accordance with changes in the external environment of the selected air temperature correction. Micro-computer can automatically switch back to the wind of fresh air damper, summer,[link widoczny dla zalogowanych], cars 室内外温度 are higher, again and again down quickly when the temperature can be temporarily closed new-car throttle, when the air conditioning system so that the temperature inside dropped to a certain value, automatic switching mechanism of the new and the return of the valve adjustment. In addition, also according to the level of control the fan speed evaporation temperature, when the evaporating temperature is low, reduce the air supply, when the evaporation temperature is high, increase the air supply. Automatic air conditioning system as soon as possible parameters of a few sensors can monitor the entire system performance, the required temperature, temperature change and temperature change rates have been compiled software. For example, if the discharge tube at the condenser temperature increases the rate of decline than the fast evaporation temperature, the entire system will be granted into the base load operation, automatic air leakage into the system to check the pressure of the system led to increased congestion, and cut off the compressor J If the condenser temperature run time and decrease the longer the evaporation temperature, automatic air conditioning system. To determine the cooling system leaks, and leaks as soon as possible to schedule wing. In addition, the thermal sensor error than the pressure switch is small, so the compressor is running efficiently, the required evaporation temperature, to accurately access and disengage the compressor. Lower temperature in the environment right, automatic air conditioning system can change the evaporating temperature, such as from 0 to 6.0 to 2 ~ 8.0,[link widoczny dla zalogowanych], again and again to reduce the working hours will mean the compressor, which can be energy saving, while the pressure switch can not do Diego, because the value of the reference temperature was fixed before it's used. Automatic air conditioning system can also control the size of the engine load 'throttle back the new system, when the engine load is high, such as car climbing, it automatically selects the indoor return air, the compressor to shorten working hours,[link widoczny dla zalogowanych], the other, when the car began to start and growth rate, it automatically release the compressor. Automatic air conditioning control system has been greatly welcomed the automotive industry, some foreign air-conditioning equipment plant being investigated = research, considering it is applied to train air conditioning.
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