How to Install and Maintain the Units Inside the Cold Storage?

2024-11-19

Installation of the indoor units in the cold storage:
Steps: Determine the location of the indoor units → Mark the position with lines → Use a hole expander to enlarge the holes → Fix the support rods on the roof of the cold storage → Connect the hanging bolts of the units → Fix the indoor units.

Refrigerant piping:
(1) Steps: For the cold storage project, carry out piping according to the requirements of the drawings → Lay the pipelines → Weld → Purge → Leak test → Dry → Insulate.
(2) For the cold storage project, in principle, the refrigerant piping should strictly adhere to the three principles of piping: dryness, cleanliness, and airtightness.
Regarding dryness, first of all, moisture is prohibited from entering the copper pipes before installation. Secondly, after piping, the pipes should be purged and vacuum-dried. Cleanliness means that attention should be paid to the cleaning inside the pipes during construction. Moreover, nitrogen replacement welding should be adopted during welding, and finally, the pipes should be purged. For the airtightness test, on the one hand, the welding quality and the connection quality of the flare joints should be ensured, and on the other hand, the final airtightness test should be carried out.
(3) Method of replacing nitrogen in the cold storage project:
During brazing of the refrigerant pipes in the cold storage project, nitrogen protection must be adopted. During welding, a slight pressure (3 - 5 kg/cm2) of nitrogen should be filled into the pipes being welded, which will effectively prevent the formation of oxide scale inside the pipes.
(4) Covering of the refrigerant pipes in the cold storage project: Covering the refrigerant pipes is very important. It is necessary to prevent moisture, dirt, dust, etc.

How to Install and Maintain the Units Inside the Cold Storage?1731990395555

from entering the pipes. When the refrigerant pipes pass through the wall, the pipe ends must be tightly wrapped. For the installed pipes that are not connected temporarily, the pipe openings should be wrapped well.

The maintenance of the cold storage includes:

Maintenance of the cold storage panels: Pay attention to avoid collisions and scratches on the cold storage body caused by hard objects during use.
Because such impacts can cause dents and rust on the cold storage panels, and in severe cases, the local thermal insulation performance of the cold storage body will be reduced.
Maintenance of the sealed parts of the cold storage: Since the assembled cold storage is composed of several thermal insulation panels assembled together, there are certain gaps between the panels. During construction, these gaps will be sealed with sealant to prevent air and moisture from entering. Therefore, in use, timely repair should be carried out for some parts where the sealing fails.
Maintenance of the ground of the cold storage: Generally, the ground of small assembled cold storages uses thermal insulation panels. When using the cold storage, a large amount of ice and water should be prevented from remaining on the ground. If there is ice, hard objects must not be used to knock it during cleaning to avoid damaging the ground.