How to maintain the constant temperature and humidity test box

     Constant temperature and humidity test chamber can simulate a variety of temperature and humidity environments, suitable for testing electronics, electrical appliances, food, automobiles, rubber, plastics, plastics, metals and other products. The temperature and humidity test chambers are generally priced at tens of thousands. In order to better extend the service life of the constant temperature and humidity test chambers, Kunshan Haida technical personnel here summarizes some maintenance considerations for the constant temperature and humidity test chambers.

　　 1, temperature and humidity test box handling considerations:

1) Using a reciprocating force compressor, the angle of tilt of the state carrying the state is 45. Otherwise, the frozen oil in the compressor will flow into the low pressure chamber from the return air pipe, and at this time, the compressor will be powered.

2) The freezing stick is sucked into the cylinder. Because the compression ratio in the cylinder is set according to the volume of the gas, the fluid is not easily compressed, so the load of the compressor will rapidly increase, causing damage to the compressor; at the same time, the refrigeration oil It is also possible to enter the condenser with the refrigerant.

3) When the dry filter enters the thinner capillary, the plugged capillary forms a plugging failure.

　　 2, maintenance site notes:

1) The repair site should be flat, spacious, and well-ventilated. There should be no open flame when discharging the equipment and adding refrigerant.

2) When the concentration of refrigerant R12 in the air is too high, it can cause people to suffocate. In the event of an open flame, it is prone to fire.

3) When the concentration of R134a in the air reaches a certain value, the agent will irritate the skin and eyes. After the concentration of R600a in the air reaches a certain value, it may explode or burn in the event of an open flame.

　　 3, equipment and device placement considerations:

1 Conditional maintenance department, acetylene (or liquefied petroleum gas) cylinders and oxygen cylinders are best placed separately, and put them

The distance between the best is more than 3m.

2 The refrigerant cylinder should be upright.

3 Normal compressors should be upright and plugged to prevent dirt from entering. For a damaged R600a compressor, its nozzle should be sealed after welding so as to avoid the consequences of fire caused by residual refrigerant inside it.

4 The dry filter can only be opened when used.

　 4, repair box notes:

Do not burn or scratch the cabinet or liner when servicing the equipment cabinet. Therefore, when performing gas welding on the evaporator, it is best to place an iron plate on the bladder to insulate it.

　　 5, electrical system maintenance precautions:

1) Since the electrical system is powered by 380V, it is necessary to unplug the power cord before removing the electrical system to avoid electric shock. When disassembling the device, it is important to remember where each color line is located. When replacing a multi-pin device, it is best to remove the line by one side, that is, remove a line from the old device and install it on the same side as the new device on the same model.

2) The ground wire can not be inserted wrong. Generally, the yellow-green two-color wire is the ground wire, and the pin connected with the metal shell is the grounding terminal.

Constant temperature and humidity box maintenance considerations summary, the above is the equipment often appears some maintenance precautions, the operator encountered similar problems, and then the right medicine, familiar with the device structure, I believe all problems will be solved.