What kind of faults can the capillary tube present?

Article by: Mar Quintanilla | Last update: April 10, 2022
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When we are in the presence of a clogged capillary tube, the refrigerant fluid circulates with difficulty or does not circulate directly, causing the refrigerant to not reach the evaporator and resulting in the refrigerator losing cooling capacity or performance.

What is the function of a capillary tube?

Its function is to keep controlled the pressure with which the flow of the refrigerant passes between the condenser (high pressure side) and the evaporator (low pressure) and to present resistance to the passage of the refrigerant in liquid state.

What if the capillary tube is very long?

When the capillary tube is longer than expected and its diameter is smaller, or both, the evaporator will lack refrigerant and the condenser will be supercharged. This will cause the system to operate at high condensing pressure and poor cooling performance.

What are the types of capillary tubes?

A capillary tube can be made of different materials depending on its use: Glass. Copper. metallic alloys.

What are laboratory capillary tubes?

The capillary tube consists of a transparent plastic tube closed at its lower end with a cap. Perpendicularly to the plastic tube and in its lower part, a glass tube of small diameter is perforated and inserted, which acts as a capillary through which the column of viscous fluid is discharged.

18 related questions found

How do I know if my window air conditioner lacks gas?

Clues to know if your air conditioning system needs a gas charge

The indoor unit or split is frozen or frosty. The indoor unit is leaking. The split stops cooling or does not cool well. The copper pipe of the outdoor unit is frozen or frosty.

What if the air conditioner has no gas?

It should be noted that the air conditioner needs a minimum amount of gas to work and obtain the necessary working pressure to carry out the liquid and gas effect. If there is a lack of gas and it does not have enough pressure when compressing, it will cause frost on the taps of the outdoor unit.

What if I didn’t change the filter in my refrigerator?

If the filter is old and clogged, the water flow slows down. Therefore, it affects the rest of the house. A new water filter will ensure your pressure stays at its maximum. The ice maker in an LG refrigerator also relies on a constant flow of water.

What happens if I cut the capillary tube?

When we are in the presence of a clogged capillary tube, the refrigerant fluid circulates with difficulty or does not circulate directly, causing the refrigerant to not reach the evaporator and resulting in the refrigerator losing cooling capacity or performance.

What faults can the capillary tube present and its possible repairs?

Damage to the capillary tube is detected because there is a lower than normal pressure in the suction and because the evaporator does not cool enough. The most frequent causes for which the capillary is blocked are plugs or dents.

How many meters of capillary does a refrigerator have?

We can point out the most common capillary measurements, which are from 1 to 6 meters long x 0.5 to 2 mm in diameter. These data must be according to the compressor capacity and system temperature.

Where is the capillary tube?

Capillary Tubes: The simplest of all expansion devices is the capillary tube which consists of a small diameter pipe installed between the condenser and the evaporator.

What is the capillary tube of a refrigerator?

A capillary tube is a long copper pipe, between 1 and 6 meters approximately, and has a hole diameter between 0.5 mm and 3.00 mm. They can work with different refrigerants, such as R 134a, domestic refrigerators, R 404a, fractional refrigeration or conservation equipment, R 22…

How long does the air conditioning gas charge last?

The refrigerant gas used by air conditioning equipment does not have a pre-established expiration date, however, if the equipment overheats, it can break down. There may also be a leak causing moisture to enter the system.

How to know the amount of gas in an air conditioner?

In general, split air conditioning units of 2,000 or 3,000 frigories usually need about a kilogram of gas, while ducted units or domestic centralized air conditioning units usually need between three and five kilograms.

How to calculate the number of capillaries?

Let’s go to the questions: the number of capillaries is easily obtained by dividing the total capillary section by the section of a single capillary.

What is the diameter of a capillary tube?

The capillaries are 750-1000 µm long and have an internal diameter of 4-10 µm, so the capillary cross-sectional area is 30-50 µm2.

What does the capillary contain?

The walls of the capillaries are made up of a very thin layer that allows blood to be drawn through organs and tissues. These are the smallest blood vessels in the system and the most common because they cross almost all the tissues of the body.

How many BTUs does a 1 4 compressor have?

¼ low = 1,000 BTUs.

What happens if I add a smaller compressor to a freezer?

Hello Inger, good morning, the MC would burn or the pipes would collapse. Taking into account that a 12,000 btu motor is 50% smaller than an 18,000 btu motor, the system would not have the capacity to refrigerate the condensate with the consequent increase in pressure in the condenser.

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