Linear Refrigerator Compressor

Today we will look at the operating principle of refrigerators with linear compressors. In our article we will talk about how it works linear refrigerator compressorwhat it is and its main varieties.

This equipment is an indispensable part of the refrigeration unit, thanks to it, the efficiency of both chambers increases. The linear type of equipment is designed to create different pressures in individual compartments of the refrigerator.

Description of linear refrigerator compressor

When we close the refrigerator door, we hear a characteristic noise made by its operation. When the compressor starts working, it creates a pressure difference inside the chambers. During operation, it cools the refrigerator compartments, removing heat by compressing and pumping the refrigerant. It transfers heat from the internal chambers to the outside, thereby cooling them.

The linear type of equipment itself is a small device that operates using an internal piston driven by electricity. It is not big and takes up little space. The entire mechanism is well hidden under its box. The design provides special holes for fastening to the machine body.

What is a linear refrigerator compressor used for?

A linear compressor, as we noted earlier, creates a pressure difference inside the refrigerator. Depending on the type of equipment, they are divided into several groups:

• screw type;
• piston type;
• rotational;
• centrifugal;
• spiral type.

Each type of equipment has both positive and negative sides. But their purpose is one, to transfer heat from the internal chambers to the outside. It should be noted that heat transfer from the camera may differ depending on the type of camera. It's no secret that the temperature of the freezer is different from the storage chamber, therefore, heat transfer inside it is carried out more intensively.

How does a linear compressor work on a refrigerator?

We have looked at the operation of the linear model on surfaces, now we will consider in more detail the principle of operation depending on its type. Let's start in order:

1. Screw type compressor, for this type of construction a screw part is used, which ensures the circulation of refrigerant throughout the entire structure. During operation, the screw helps create high pressure inside the system.
2. Electricity is supplied to a special rotor, connected using a special connecting rod to the piston. The piston, in the process of translational movements, creates pressure inside the system, which allows for more efficient cooling of the system.
3. For rotary type operation, a special rotor is used, which drives an electric motor. When the rotor begins to rotate, the eccentric flows to the inner surface of the cylinder. Where it compresses the refrigerant gas and pushes it out through the release valve.
4. Centrifugal type equipment is a system, operating on the principle of compressing a gaseous medium using a rotor with a shaft. The rotor has special wheels that are located symmetrically to each other. When the wheels with blades rotate, the gas begins to move from the center of the wheels to the edge. Then the gas is compressed, acquiring inertia, and begins further movement through the system. This process helps the refrigerator operate and maintain the optimal temperature.
5. When operating spiral type equipment, the refrigerant is compressed in the space between the two spirals. One of them stands, moves forward, and the second rotates around it. It is important to note that the rotation has a non-standard trajectory; when the engine operates, which drives the movable spiral, it will mix along the walls of the first spiral, sliding along the oil film. The point of contact shifts from the edge of the spiral to the center, which facilitates the absorption of the substance. High gas pressure is achieved in the center of the equipment, and then the gas moves through the discharge line throughout the system.

Depending on its type, the principles of operation are slightly different, but despite this, all types of linear compressors are designed for one specific purpose, to regulate the pressure in the refrigerator chambers and maintain the temperature regime.

In addition to the linear type of compressor, there is also an inverter type, which is also very popular; below we will take a closer look at their differences.

Differences between linear and inverter refrigerator compressors

Unlike linear models, the inverter model does not heavily load the refrigerator systems; it does not need to be turned on to maintain the temperature regime and turned off every time, it simply works stably and smoothly. This principle of operation loads the electrical network noticeably less and reduces the percentage of possible short circuits to a minimum. When you turn on the equipment, the inverter model quickly reaches the desired temperature and maintains it throughout the entire operating time.

It practically does not turn off, but simply reduces the power of operation. It should be noted that power changes occur gradually and smoothly, without loading the system. As a result of such work, large fluctuations in the temperature of the chambers are not observed. Let's break down its advantages:

• due to the fact that there is no need to work at maximum power, the noise level becomes less;
• The service life of such a refrigerator is noticeably longer, due to the fact that there are no periodic switching cycles.

But, it would seem, why have refrigerators with an inverter system not yet squeezed out models with linear compressors? But not everything is so simple, these models also have weak sides:

• the inverter model is more sensitive to voltage drops;
• the cost of such models is noticeably higher than that of refrigerators with linear compressors.

Advantages of refrigerators with linear compressor

A refrigerator with linear equipment is more productive; its electromagnetic circuit can significantly reduce electricity losses during equipment operation.

Important! When operating this equipment, “direct current” circuits are used, which improves the energy saving class.This equipment has a quiet start system, which reduces the noise level and keeps it to a minimum. If we compare environmental indicators, this model is significantly ahead of the inverter model in many respects. And most importantly, its price is noticeably cheaper than its competitor, which is a strong argument in its favor.