毛细管长度计算(Capillary length calculation)

毛细管长度计算（Capillary length calculation）Calculation formula of capillary length in refrigerator and freezer

Fridge, freezer, formula, capillary, length

Formula for calculating capillary length of refrigerators and freezers -- Test Method for capillary length

The process of open tube, high pressure pipe is connected with a pressure meter is connected with one end of the capillary, dry filter, the other end is not welded, start the compressor, if the steady pressure gauge at about 0.98-----1.177Mpa, can be considered appropriate, the pressure is too high to cut a little pressure, hour plus a short trial, until the appropriate date, then the capillary and an evaporator connected. Vacuum and charge refrigerant.

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Most factories use test method to determine the length of the capillary, the equipment needed: high-pressure bottle, flowmeter, hydraulic measurement and pressure measurement conditions, and in the maintenance because of conditions, it's difficult; here is a convenient measuring method:

For a double tail drying filter in the refrigerator condenser output needs to replace the capillary end of the welded joint and the condenser pipe (pipe selection 5 mm diameter copper tube and three gauge frame, in the choice of a basically and the diameter of the capillary tube length are similar in length,

according to the power of the compressor estimates, usually in the 2 meters -2.8 meters between the end to a dry filter. The output end of the insertion depth of 0.5~1 cm in general should not be too deep, too deep will touch the drying filter filter clogging, can not be too short, too short to loot by capillary caliber, correct welding, open compressor the export process, open the compressor connected to the drying filter check the pressure gauge on the pressure, depending on the choice of different refrigerant pressure, such as pressure too high Shorten some capillaries and, on the contrary, lengthen them, when they are basically within the range of pressure provided below. The following provides different refrigerant pressure ranges:

R12 11.5~12.5KG/CM2

R134 10.5~11.5KG/CM2

R22 15.5~18KG/CM2

R600 9.6~10.5KG.CM2

In actual maintenance, constant testing and standard length are available for future testing and length, but must be consistent with the diameter of the test capillary

3. homemade fast method for refrigerator evaporator and capillary!!!

In the maintenance of refrigeration equipment, such as refrigerators and freezers encountered in the evaporator

leakage, the general can not remove the original evaporator coil, on the basis of internal packaging can be recognized re coil. However, calculating the length of the copper tubes used will cause many maintenance workers to feel headache. Here is a quick way to everyone, for reference.

A fast method

1. calculation formula of new tube length of refrigerator evaporator

Total length of pipe = length of freezer room + length of cold storage room

Freezing chamber length =1/3, total volume (L) * 0.148 M / L

Refrigerating chamber length =2/3, total volume (L) * 0.03 M / L

2. calculation formula of new tube length of electric refrigerator evaporator

Copper tube total length =1/3, total capacity * 0.148 M / L, +2/3 gross capacity * 0.03 M / L

Note: the calculation method of the length of brass in the formula, suitable for the diameter of copper for 6mm and 8mm Phi Phi

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