Expansion Valve Car Ac System Diagram

If you were to touch this part of the system you d feel it change from hot to cold.

Expansion valve car ac system diagram.

Ac accumulator orifice tube systems are found in some automobiles while other vehicles include an expansion valve in place of the orifice tube and a receiver drier instead of the accumulator. Thermal expansion valve or orifice tube. Thermal expansion valve txv. The purpose of the valve is to manage how much refrigerant liquid can flow throughout this system.

Here the system changes from the high pressure side to the low pressure side. Whenever there is an abundance of refrigerant the core of the evaporator will get too cold and eventually freeze. The expansion valve plays the same role as the orifice tube in that it restricts refrigerant flow to allow the pressurized liquid to expand into a low pressure mist. You ll need a manifold gauge set and a full can of dust off spray.

Now that you know how your ac system works check out our other air conditioning guides like how to recharge your car s ac or diagnosing ac problems. As stated previously cars with a thermal expansion valve utilize a receiver dryer while a vehicle with an orifice tube utilizes an accumulator. Refrigeration and air conditioning air conditioning system engine repair car engine ac system ac compressor buggy heat pump mechanical engineering. The a c expansion valve is found within the air conditioning system of a vehicle.

Problems symptoms of a bad accumulator and orifice tube. First determine if the h block expansion valve is accessible. How to test an h block style expansion valve. Car air conditioner system diagram modern design of wiring diagram how your ac works autozone 20926438224 automotive ac system flow.

The diameter of the orifice tube is similarly small to that of the passage inside the expansion valve but there is one big difference between orifice tubes and expansion valves. Many car makers now use automotive ac expansion valve in their ac systems. The accumulator when exposed to the atmosphere allows moisture to enter the system. How car air conditioning expansion valve works admirable a basic well known auto air conditioning wiring diagram uf27.

Connect your gauges to the car ac high and low service ports. It s either near the firewall or under the dash. Regardless the thermal expansion valve or orifice tube should be located between the condenser and evaporator. An orifice tube is a simple fixed device with no moving parts.

It cannot vary the amount of refrigerant flowing into the evaporator the way an expansion valve can. An expansion valve is simply a refrigerant metering device to control the rate of flow of refrigerant into the evaporator located in your dash. The high pressure liquid refrigerant flows from the receiver dryer through the expansion valve where it is allowed to expand.