evaporator, is an integral part of the automotive air conditioning system, air conditioning system refrigerant within the liquid into gas, the evaporation heat absorption properties.
1. The Automotive air conditioning works
automotive air conditioning and home air conditioning refrigeration principle is similar, are using the instant release of the compressed volume R134a rapid expansion of principles will absorb a lot of heat refrigeration. The automotive air conditioning configurations and similar household split air, it is often the compressor mounted on the engine, and a belt drive (also direct drive), a condenser mounted in front of the vehicle radiator, and an evaporator in the car, when working out the low-pressure gaseous refrigerant from the evaporator into high-pressure high-temperature gas flowing through the compressor, through the condenser heat pipe cooled down into the high-pressure low-temperature liquid, and then after the buffer dehumidification drier, then more stable pressure and flow to the expansion valve, and finally through the throttle and down to the evaporator. A low pressure environment, i.e., refrigerant evaporation case, absorb large amounts of heat. The air in the passenger compartment through the evaporator continuously, thus reducing the temperature inside it. Liquid refrigerant into low pressure gas passing through the evaporator again, sucked into the compressor again for the nextWork cycle times.
in the whole system, the expansion valve is to control the refrigerant entering the evaporator bodies, too much refrigerant enters the evaporator to cool air while too little will not evaporate enough, therefore the expansion valve is adjusted center. The compressor is the heart of the power source system, systemic circulation.
2. The automotive air conditioning composition
automotive air conditioning compressor is generally formed predominately (Compressor), electrically controlled clutch, a condenser (condensers), an evaporator (Evaporator), an expansion valve (expansionvalve) , drier (receiverdrier), pipe (Hoses), condenser fan, vacuum solenoid (vacuumsolenoid), idle speed control systems and other components. Automobile air-conditioning of the high pressure line and a low-pressure line. It includes a compressor output-side high pressure side, the high-pressure pipe, a condenser, a drier and a liquid conduit; low-pressure side comprises an evaporator, the accumulation, a return line, the input side of the compressor and compressor oil pool.
(1) a drier actually storing refrigerant and the refrigerant absorbing moisture, impurities apparatus. On the one hand, it is equivalent to the fuel tank of the car, was leaked refrigerant extra space to add refrigerant. On the other hand, that it is like a air cleaner, filter out impurities doped in the refrigerant. Also drier with some silicone material acts to absorb moisture.
(2) is the heart of the compressor air conditioning system, which is a refrigerant circulating in the system power source.
(3) Since the pipe to be injected under pressure of the refrigerant, it is necessary to use a metal pipe. Especially from the compressor to the condenser to the expansion valve to the refrigerant bottle of this, since the high-pressure section of the system of the genus, it is higher than the other pipes of high voltage requirements.
(4) As the name suggests the compressor, the compressor is compressed from the role, its role is to make the refrigerant to complete the transition from gas to liquid, the purpose of the condensation heat of the refrigerant.
(5) Although the condenser and the evaporator are not the same name, but similar structures. They are covered with a metal sheet for heat dissipation in a row around the bend pipe, in order to achieve devices with outside air heat exchange pipe material.
refers to a condenser for condensation refrigerant heat pipe in which a liquid from the gaseous cemented. Radiator principle similar to the engine (the only difference is that the water tank has a liquid only), so it is often mounted at the front, so that condensation heat.
while the evaporator and the condenser on the contrary, it is a refrigerant from the liquid into gas (i.e., evaporator) to absorb heat properties.