Requirements for rapid temperature change test chamber in aerospace equipment stress screening test

According to my country's standard requirements, 100% of aerospace equipment needs to be screened for environmental stress. For these aerospace equipment, what are the specific requirements of the rapid temperature change test chamber in the stress screening test of aerospace equipment? Let's take a look.

Environmental stress screening equipment is generally referred to as a "rapid temperature change chamber". The device has the following requirements:

1. There should be shelves for product placement, so that the screened products are fully exposed to the air in the screening equipment chamber.

2. There should be sufficient working temperature range and temperature change rate.

3. The heat source arrangement in the chamber should not make the radiation directly reach the product and sensor.

4. The airflow in the chamber should make the temperature field uniform and have a high flow rate to facilitate the heat exchange between the product and the air.

5. The option of air dehumidification should be provided to prevent condensation of the product.

6. The available thermal cycle screening equipment is divided into mechanical refrigeration and liquid nitrogen refrigeration according to the refrigeration method. The former has high control accuracy, but the temperature change rate is limited by the refrigeration power (generally 5℃/min~10℃/min); The latter has poor control accuracy, but the temperature change rate can reach 30℃/min~60℃/min).

If you want to know the relevant parameters of the rapid temperature change test chamber, you can visit the official website of "Huanyi Instrument" and consult relevant technical personnel.