What is a cilia? Learn about capillary tubes in the refrigerator

Capillary tube is an important device in the refrigerator, directly affecting the operation of the cabinet. At the same time, many users wonder about the size of the refrigerator capillary tube. So let’s find out more about cilia through this article with Tnhelearning.edu.vn!

What is a cilia?

Capillary tube is Kapile tube, capillary tube, spray cable,… This is a throttling device or expansion device mainly equipped in refrigerators and air conditioners. The capillary tube is simply composed of a very small diameter of 0.6 – 2mm with a length of 0.5 – 5m .

Features of capillary tubes in refrigerators

Installation location

The capillary is installed between the filter dryer at the rear of the condenser and connected to the evaporator in the direction of the refrigerant movement.

Function

The capillary acts as a throttling function in the refrigeration system, ie supplying an adequate amount of liquid gas to the evaporator and maintaining the evaporator pressure consistent with the evaporator temperature in the indoor unit.

Mechanism of action

Capillary tubes operate based on a cooling mode that requires a certain amount of liquid gas to be injected into the indoor unit. Then, this amount of liquid gas must match the refrigeration capacity of the compressor and the flow through the capillary at the specified conditions.

Advantages and disadvantages

• Advantages : The capillary tube does not have many moving parts, so it is very simple to operate and does not need a container. When the compressor stops working for a few minutes, it helps to balance the pressure of the two capillaries and start the compressor again easily, saving energy.
• Cons : Only suitable for use in refrigeration systems with small and very small capacity because the capillary tube cannot automatically adjust the flow according to different working modes. At the same time, the tube is easy to dirty, easy to clog and damp, and difficult to determine the length of the pipe.

Determine the size of the cilia

The flow of the capillary depends on the geometrical dimensions of the tube such as: length, inner surface roughness, inner diameter, tube layout to straighten or curl springs,… Also depends on condensing pressure, suction pressure and supercooling temperature of liquid gas.

However, the refrigeration capacity of the compressor varies inversely with the capillary flow. To determine the capillary size, you can rely on the simple German math DKV – Arbeitsblatt 4 – 17 .

Common problems and solutions

In the process of use, the capillary tube of the refrigerator often has problems such as the capillary clogged with moisture and the capillary clogged, causing the refrigerator to run for a while and then stop. The reason is that the capillary tube is blocked, making it impossible for gas to circulate in the pipe and clog in the outdoor unit.

From there, the compressor works too much, leading to high pressure and temperature. To overcome this error, some refrigerator manufacturers have equipped a filter in front of the capillary to filter out impurities generated when the compressor operates.

Above is an article about what is a cilia? Learn about capillary tubes in the refrigerator. If you have any questions about the refrigerator, please leave a comment below!