For the constant temperature and humidity test chamber, which uses the compressor for temperature control, in the practice of equipment maintenance, the capillary system is clogged in the refrigeration system, and the evaporator, condenser and connecting pipeline are cracked or broken at the scene, resulting in refrigerant. Leakage, when the compressor is replaced, etc., the system needs to be vacuumed.
In the process of vacuum pumping in the constant temperature and humidity test chamber, the “self-vacuum method†is a very practical method (especially when the door is repaired). In fact, the operation skill is relatively strong, and there are certain difficulties in operation. . The following is a description of some of the operating methods:
1. Preparation tools and materials: 1 multimeter, 1 test pencil, 1 set of combination screwdriver, 1 set of needle-nosed pliers, 1 vacuum pressure gauge, 1 B-12 cylinder, refrigerant about 500g, 3 liquid addition tubes , 1 set of welding tools, a number of copper tubes for welding;
2. Process pipe;
3. In-situ welding according to the system structure;
4. Power on the compressor and observe it;
5. System exhaust.
The above content is about the introduction of the maintenance operation method after the refrigerant leakage in the constant temperature and humidity test chamber, and the maintenance personnel can learn from the actual operation process.
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