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AC Expansion Valve and Orifice Tube
| Air conditioners are on the whole comprised of five major parts. These parts are a compressor, condenser, evaporator, receiver and accumulator. The compressor is the heart of an air conditioner or rather the main working body. Its main function is to compress the coolant from the evaporator coils. The compressor is basically a pump that is connected to the engine and has an inlet and outlet pipe at its ends. The function of the condenser is to radiate heat away from the compressor and bring about all the cooling that takes place. The evaporator primarily absorbs all the heat from the system and the orifice tube controls the pressure within the evaporator. It either creates more pressure or reduces it, whatever the case may be. At the same time an expansion valve performs the function that creates and controls the pressure in the entire process of condensation. An auto condenser works with a compressor, expansion valve, evaporator and a receiver. The AC works with a refrigerant (which is a coolant actually) and air. The compressor takes in the refrigerant gas and heats it up. Now when this gas goes into the condensation coils, the heat is dissipated through these coils and the air is blown out of the coils via the fan. The heat is dispersed ad the refrigerant cools down into a liquid form. This liquid is again converted into cold gas. And the entire flow of the refrigerant is controlled by the expansion valve. In this case, the liquid part of the refrigerant stays back in the evaporator while the cold gas flows into the receiver which finally emits cool air into the air conditioner. Typically, the car AC expansion valve is located at the evaporator inlet. These valves have an inlet and outlet function both. This how the pressure is controlled and the refrigerant is taken to and from the valve because of the location and the structure of the valve. At the same time, the car AC orifice tube also performs the same function as that of the expansion valve. However, there are differences in their designs and location within the auto air conditioner. The orifice tube can be located in a variety of positions as opposed to the expansion valve. Where the expansion valve can only be located at the evaporator inlet, the orifice tube can be located at the evaporator inlet, in-line between the condenser and the evaporator or in the condenser outlet. Both these components are a great feature of an auto AC since they restrict the flow of the refrigerant so that it lands into the evaporator at the right atmospheric pressure. On the whole, auto AC systems are formed by these parts. The auto AC should be properly maintained and serviced before every season so that expansion valve and the orifice tubes remain in proper condition always. Moreover, these parts are also available as replacements and there are many companies and manufacturers who sell these parts and also provide their replacement services. |
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Here you will learn about AC Orifice Tube and AC Expansion Valve
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