The compressor from the refrigerator is used to compress the refrigerant and move it along the circuit of the entire heat exchanger system. This is achieved by creating a pressure difference. It is in it that electricity is converted into work to transfer heat from internal chambers to the external atmosphere. Which creates a cooling effect.
Kinds
The modern type of compressor for refrigerators is mainly a piston with a vertical layout of the motor shaft. It is suspended on springs and closed by a sealed housing. This ensures a reduction in noise in the system. Previously, the compressor from the refrigerator had a horizontal layout, which made the design more noisy, since vibrations were transmitted to the entire body. Piston devices are divided into crank crank and crank rocker. Both varieties have proven to be reliable and durable mechanisms. Crankshaft devices capable of withstanding quite large loads are installed on large refrigerators. Along with imported refrigeration equipment, a new type of compressors appeared - linear compressors. They do not have a rotating shaft, and the reciprocating movement of the piston is provided by electromagnetic forces. They are also installed on refrigerators with a large volume, as these are very economical devices. Rotary compressor from the refrigerator is even less common. Here the pressure difference is created by changing the pressure in the suction and discharge chambers by rotating the rotor. It has small dimensions. But in Russia and in neighboring countries they are not produced. The screw compressor from the refrigerator in its technical characteristics is similar to a reciprocating one. However, the first is characterized by less weight, reliability in operation, it does not have friction in the compression plane, in addition, it can be used at low temperatures.
Refrigerator compressor repair
Repair of the refrigerator is divided into two main types: repair of automation and overhaul. If components such as the evaporator, compressor, condenser fail, a major overhaul is performed . It consists in removing the refrigerant from the refrigeration unit and replacing the failed nodes. Compressors fail most often due to an oversight of the service organization. The most common reason for the failure of this unit is the untimely replacement of the air filter.
Because of this, the valve block first and then the crank mechanism fail. If it is precisely established that the compressor has failed, then if there are small seizures in the rubbing vapors and if the stator windings are intact, you must try to start it before dismantling it. For these purposes, for a short time, the windings through two diodes with different directions of conductivity are connected to a network with a voltage of 220 V. The free ends of the diodes are connected. In this case, a rotating alternating moment occurs on the rotor. The rotor will vibrate at a frequency of fifty Hz. Vibration will be transmitted to jammed friction pairs, which will reduce the friction force.