What are the ways to block commercial refrigerators and freezers?

Commercial refrigerators and freezers have been used for a long time, causing blockages, which is why we regularly clean and maintain the freezer. However, the types of these jams are different, so we have to use different freezer blocking methods for different plugging. Let Cookeryaki' Commercial Freezer Prices share some knowledge and experience in this area. Commercial freezer refrigeration system blockage has three conditions: dirty block, oil block and ice block. The following only describes the operation process to eliminate dirty plugging. The oil plugging and ice plugging methods are similar.

Dirty plugs generally appear in the capillary or drying filter. When repairing, the torch can be used to seal the nozzle and the low-pressure return pipe can be removed. After cooling, the nozzle is filled with 0.6MPa high-pressure nitrogen gas to observe whether the capillary port has nitrogen gas. If not, it proves that the capillary does show a dirty plug. There are three methods for eliminating dirty plugging. There are three methods for eliminating dirty plugging.

Evacuation cleaning method:

The method of evacuation cleaning is to inhale the cleaning agent with a vacuum pump (or old compressor) into the freezer and contaminated pipes and components for decontamination. It is suitable for both high and low pressure side system cleaning, and can be adapted to segmentation and single piece cleaning.

Prepare two glass bottles with the same volume of 5000ml, put 2/3 cleaning agent into the washing bottle, turn on the vacuum pump, and the liquid cleaning agent will be stored in the liquid absorption bottle through a washing bottle, a condenser and a dew prevention pipe, that is, complete the high pressure side. Cleaning. If the adapter is switched, the cleaning agent in the washing bottle passes through the condensation chamber evaporator, the freezer compartment evaporator, and the freezer compartment back evaporator, and enters the liquid suction empty bottle to complete the low pressure side cleaning. Since the suction port in the aspiration bottle is higher than the liquid level, the detergent will not be sucked into the vacuum pump. After cleaning, the residue can be blown out by a pressure cleaning method and installed in time to avoid moisture. The next section will give you the opportunity to continue to share the remaining 2 experiences and methods of freezer blockage.

Pressure cleaning method:

The pressure cleaning method is to fill the contaminated pipelines and components and then blow them out to achieve the purpose of blowing and blowing.

First open the nitrogen bottle valve, adjust the pressure reducer, adjust the high pressure side to 1.3MPa, and adjust the low pressure to 0.6-0.8MPa. At this time, the gas flow on the high pressure side is a cylinder-condenser door anti-dew pipe. The dry filter is sprayed out. If there is no gas sprayed, the dry filter may be dirty, or the filter may be removed to blow dirty. Blowout verification. The gas flow on the low pressure side is a gas cylinder one at the beginning of a compressor, one gas return pipe, one freezer compartment back evaporator, one freezer compartment evaporator, and one cold room evaporator one blown out from the capillary. If there is no gas ejected from the freezer, it may be a dirty plug. Since the inlet end of the capillary is connected to the evaporator, the inflation type evaporator can be pressurized to 0.9 MPa: the aluminum coil evaporator can be pressurized to 1.1 MPa for blowout verification. Once the blow block is inactive for a few minutes, only the capillary of the freezer cabinet is welded and verified, which also helps the evaporator to blow oil, blow dirty or blow. The purged refrigeration system should not be placed for a long time. It is best to restore the filter in time.

Annealing cleaning method:

Annealing cleaning method is to use a copper tube (or copper tube) with a hard, thick skin and a large diameter to be uniformly roasted with an oxygen flame (commonly known as annealing), and then the scale is removed. The annealed pipe can not only meet the needs of bending and flaring, but also prevent crack damage due to pressure concentration.

The cleaning of the scale is usually carried out by washing and pickling in addition to the rough blowing of the gas.

(1) Washing method. The yarn end is tied to the wire, and after immersing in the gasoline, the wire is inserted into the nozzle, so that the yarn end is pulled tightly through the pipe wall, and each time it is pulled, it is cleaned with gasoline, and finally the yarn end is cleaned and cleaned.

(2) Pickling method. Mixing 98% nitric acid with water 3:7, immersing the tube in the acid solution for a few minutes, taking it out in alkaline water, washing it with water several times, then drying and blowing it.

These are the common blocking technologies for commercial refrigerators and freezers. If you encounter such problems in the future, you can try the above methods. If you can't solve them, you can find a professional commercial refrigerator and freezer manufacturer like Cookeryaki, which will solve the problem.