Repair And Fix it

Automotive air conditioning is considered a necessity for most people. Consequently, we have come a long way in revolutionizing the air conditioners in our cars. The latest upgrades to this useful invention include the ability to set a desired temperature and have the system adjust automatically. Automotive air conditioners may be of two types. The main difference between the two types lies in the device that lowers the refrigerant pressure. Each has advantages and disadvantages.

Components

The main shared components of the two types of car air conditioning include the compressor, condenser, evaporator, orifice tube, thermal expansion valve, receiver-drier and accumulator. The orifice tube may be replaced by a thermal expansion valve, thus the two types of automotive air conditioning.

Process

The compressor pulls low-pressure refrigerant from the evaporator and compresses it into high-pressure refrigerant vapor that is moved to the condenser. During this process, the temperature of the refrigerant is increased. While the high-pressure refrigerant is in the condenser, it is cooled down by fans blowing across the condenser fins. The refrigerant is then collected by the receiver-drier, which is filtered and dried.

As a result of this process, liquid refrigerant builds up at the bottom of the receiver-drier, with the vapor at the top. The expansion valve then allows a certain amount of the liquid refrigerant to enter the evaporator. During its final stage, the refrigerant leaves the evaporator as a gas by absorbing the heat inside the car. As the warm air from inside the automobile is forced onto the evaporator fins, it is cooled by the refrigerant and released back to the cars interior. The moisture from the warm air after the cooling process is drained away.

Orifice Tube System

The orifice tube systems are commonly found in General Motors (GM) and Ford models. The orifice tube is located in the inlet tube of the evaporator or in the liquid line. The orifice tube is no longer than 3 inches. It is made up of small brass tubes surrounded by plastic, covered with a filter at each end.

Disadvantages of the orifice tube system include clogging caused by debris and high costs of repairing or replacing the tube. To avoid the clogging of debris in the orifice tube system, install a larger pre-filter in front of the orifice tube.

Expansion Valve System

The expansion valve system is generally used on after-market systems. This system is efficient at regulating refrigerant to the evaporator. It is located at the firewall, between the evaporator inlet and outlet tubes and the liquid and section lines. It may clog with debris. Additionally, the valve contains small moving parts that may stick together or malfunction because of corrosion.

The car battery is recharged by the alternator of your car so that it can continually supply electricity. Hooking two batteries together can be done without much effort. It is a simple process that will take only a few minutes. You may want to connect two batteries to have a longer charge build-up or for another project needing battery power to last longer between charges.

Instructions

1

Find a safe place to work and put on gloves and protective goggles.

2

Lay out connector cables so they are easy to access.

3

Connect the batteries by attaching the negative side of the first battery to the positive side of the second battery using your cable. Tighten the retaining nuts on the cable clamps with pliers.

4

Hook the positive side of one battery and the negative side of the other battery to your power need. Tighten the retaining nuts on the cable clamps with pliers.

In order to wire 24-volts with two batteries and gain optimum power, a serial connection should be used. Batteries arraigned in series are quite common. A tube flashlight that holds four batteries is a serial connection when all the batteries are inserted into the tube with the nub, or positive terminal up. Four 1.5-volt batteries in a serial connection will yield six volts. In order to yield 24-volts from a two-battery connection, two 12-volt batteries are needed. This connection is popular in large trucks, construction equipment and some recreational vehicles.

Instructions

1

Place two 12-volt automotive batteries in a battery hold-down box or on a rigid shelf. The batteries should be positioned next to each other so that the positive post of one battery is nearest to the negative post of the other one.

2

Secure the batteries to the battery box or shelf. If no tie-down apparatus is available, a suitable system to secure the two 12-volt batteries to the battery box or shelf is to place a small ratcheting load binder over top of the two batteries and attach the two binder ends to the battery shelf or battery box, one on each side of the batteries.

3

Join the positive battery post from one 12-volt battery to the negative post of the other 12-volt battery using a battery cable equipped with a positive terminal on one end and a negative terminal on the other end.

4

Connect the two unconnected battery posts, one from each battery to any device as needed. Remember that these two batteries are now joined in a series and yield 24 volts at the two unconnected posts. Adhere to the polarity of the now 24-volt series by connecting the open positive post to the positive and the open negative post to the negative terminal of the device to be powered.