Quick temperature test box knowledge article: analysis of the reasons for its slow cooling
Recently, some customers have reported that the rapid temperature change test chamber cools down slowly. For example, the average temperature drop rate of the rapid temperature change test chamber design is 2°C/min. In the actual operation process, if the temperature drops by 30°C, it is theoretically about 15 minutes. The cooling process can be completed. However, the actual cooling time is much longer than this time. So, what are the factors that caused the slow cooling of the test chamber and how can we solve the problem of slow cooling?
First, the internal causes of the device
(1) The equipment fan does not work
After the equipment is running, observe whether the fan is running. Normal operation can hear the fan rotating sound. If the fan can start normally during the operation of the test box, it is not a problem with the fan. On the contrary, you need to repair and replace the fan.
Second, external reasons:
(1) The temperature of the use environment of the rapid temperature test chamber is too high
It is generally recommended that the device use an ambient temperature of around 5 to 30°C. If the ambient temperature of the device is too high, for example in the summer, the room temperature is around 36°C, there may be other devices around to dissipate heat, and the temperature may even exceed 36°C, which will lead to slow heat dissipation in the high and low temperature alternating test chamber.
(2) The dust on the equipment condenser is serious
Because the equipment is not maintained for a long time, the dust on the condenser of the equipment is serious, which affects the cooling effect. Therefore, it is necessary to regularly clean the equipment condenser.
(3) The test product has a large load
If the test product requires a power test, generally speaking, as long as the heat output of the test product is within 200W, the impact on the test box is not significant. If the heat generation is too large, the temperature inside the box is slow down, and it is difficult to reach the set in a short time. temperature.
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