When there is an internal leakage in the high-low temperature test chamber, it is first determined whether it is a high pressure or a low pressure internal leakage. The relevant information describes the method of splitting and adding a table to test for leakage. For a microleakage, a longer observation time is required and the operation is more complex. Now we introduce a simple judgment method:
We all know that the specific performance of high and low temperature test chamber leakage is not cooling or cooling weak, and the low pressure end of the high and low temperature test chamber pressure still has a certain cooling capacity at 0 pressure, we can use this to determine the high and low temperature The inner leak part of the test chamber. Because if the high and low temperature test chamber leaks in the high pressure part, the refrigerant leaks quickly due to the high pressure, and until the high pressure is 0, the basic no longer leaks. At this time, the high and low temperature test box has no refrigeration capacity, but continuous operation. Not stop. If the high-low temperature test box leaks at low pressure, the leakage will be slower due to the lower normal pressure at the low pressure side (about 0.06 MPa). Up to 0 pressures, the internal and external pressures of the high and low temperature test chambers do not leak when the pressure is balanced. At this time, the performance of the high and low temperature test chambers is continuous, but it still has a certain cooling capacity. Based on the above analysis, the location of the leak in the high and low temperature chamber can be determined. The key to using the above method is to ask the user when the fault occurred, during which the user has no artificial downtime.
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