Two box-type thermal shock test chamber, this product is suitable for safety performance testing of electronic components, providing reliability testing, product screening testing, etc. At the same time, through this equipment test, the reliability of the product can be improved and the quality control of the product can be carried out.
It is an essential test equipment in the fields of aviation, automobile, home appliances, scientific research, etc. It assesses and determines the parameters and performance of electrical, electronic, automotive electrical appliances, materials and other products after the temperature environment shock changes in high and low temperature tests, and its adaptability to use. It is suitable for schools, factories, military industry, research institutes, and other units.
This article will provide an in-depth introduction to the basic elements of its working principle, failures and solutions, and maintenance precautions and methods.
1. Working principle of two box-type thermal shock test chamber
The test chamber generates a high temperature (70~125) and a low temperature (-25~-70) environment through the unit heating system and refrigeration system. According to the relevant regulations of the temperature shock test, the component under test is placed in the basket of the greenhouse. When the two greenhouses reach the predetermined temperature and stabilize, the basket is pulled by the transmission device to realize the movement of the component under test in the high and low temperature chambers. During the movement, the high and low greenhouses are connected to each other, and the component under test also enters another greenhouse from the high temperature or low temperature, which will bring a lot of cold and heat loads. The unit should quickly restore to the predetermined temperature of each greenhouse through the refrigeration system or heating system. After the temperature of the greenhouse where the component under test is located is stable for a long time, the basket is pulled in the opposite direction through the transmission device to bring the component under test into the original greenhouse, and it must also quickly restore to the predetermined temperature. When the temperature is stable again for a long time, the above operation will be repeated to complete several temperature cycle shock tests.
2. Faults and Solutions
(1) Fault phenomenon
When using the hot and cold shock test chamber, the following fault phenomena may occur:
Inaccurate temperature control: The test chamber cannot reach the set temperature range, or the temperature fluctuates greatly at the set temperature.
Cooling system failure: The test chamber cannot cool normally or the cooling speed is too slow.
Heating system failure: The test chamber cannot heat normally or the heating speed is too slow.
Control system failure: The test chamber cannot control the temperature normally, or the control method is not flexible.
Other faults: such as excessive noise, power failure, etc.
(2) Causes of failure
There may be many reasons for the failure of the hot and cold shock test chamber, mainly including the following aspects:
Equipment aging: After long-term use, the components of the equipment may be worn or aged, resulting in performance degradation.
Temperature sensor failure: The temperature sensor is an important part of the control system. If the sensor fails, the temperature control will be inaccurate.
Refrigerant leakage: If the refrigerant leaks, the cooling system will fail and cannot be cooled normally.
Heating element failure: The heating element is a key component for controlling the heating of the test chamber. If the heating element fails, the heating system will fail.
Control system failure: The control system of the test chamber may fail, resulting in the inability to control the temperature normally.
Other reasons: such as power failure, poor line connection, etc.
(3) Solution
For the failure of the hot and cold shock test chamber, we can take the following solutions:
Regular maintenance: Regularly maintain the test chamber, including cleaning the equipment, replacing aging parts, etc., to ensure the normal operation of the equipment.
Temperature calibration: Regularly calibrate the temperature sensor to ensure the accuracy of temperature control.
Refrigeration system maintenance: If a refrigeration system failure is found, it is necessary to find a technician to repair it in time to ensure the normal cooling of the test chamber.
Heating element maintenance: For heating element failure, it is also necessary to find a person to repair it to ensure the normal heating of the test chamber.
Control system maintenance: For control system failure, you can try to reset the control parameters. If the problem still exists, the supplier or technician needs to perform maintenance.
Power supply check: If the test chamber has a power failure, it is necessary to check whether the power line is connected correctly and whether there are problems such as power fluctuations.
Keep the environment stable: The test chamber should be placed in a stable environment to avoid environmental factors such as temperature and humidity from affecting the equipment.
Learning how to use: For failures caused by improper operation, it is necessary to strengthen operation training and improve the skill level of users.
3. Maintenance precautions and methods
The hot and cold shock test chamber is a high-precision testing equipment used to simulate the performance of products in extreme temperature environments. In order to maintain its long-term stable operation and ensure the accuracy of the test results, regular maintenance and care are required. The following are some key maintenance and care steps:
(1) Clean the equipment: It is crucial to keep the hot and cold shock test chamber clean. Clean the surface and internal components of the equipment regularly to avoid dust and debris accumulation. When cleaning, pay special attention to the cleanliness of the condenser, radiator and electrical components to maintain good heat dissipation and prevent electrical short circuits.
(2) Check the refrigerant: The refrigerant is an important part of the hot and cold shock test chamber, and its level and purity need to be checked. Insufficient or deteriorated refrigerant may cause the performance of the equipment to deteriorate or even damage the equipment. Therefore, professionals should be asked to check the refrigerant regularly and add, replace or regenerate it as needed.
(3) Maintain the heating element: The heating element is a key part of the hot and cold shock test chamber and needs to be checked and maintained regularly. Make sure that the heating element is not damaged or dirty, and clean the dust on the surface in time. In addition, the connection part of the heating element should be checked regularly to prevent poor contact due to oxidation or looseness.
(4) Check the electrical system: The electrical system of the hot and cold shock test chamber should be kept in good condition. Regularly check whether the wires, cables and sockets are damaged or aged, and replace damaged parts. In addition, the grounding of the equipment should be checked regularly to ensure the safe operation of the equipment.
(5) Calibrate sensors: The hot and cold shock test chamber is usually equipped with multiple sensors, such as temperature, humidity and pressure sensors. These sensors need to be calibrated regularly to ensure the accuracy of the test results. Please ask professionals to calibrate the sensors in accordance with relevant standards and specifications to ensure the reliability of the test results.
(6) Maintenance records: In order to facilitate the tracking of the maintenance history of the equipment and timely detection of potential problems, it is recommended to record the maintenance of the equipment. A maintenance log can be established to record the cleaning, inspection, repair and calibration of the equipment, and indicate the operation date, personnel and operation details. This can help you track the performance trend of the equipment, take preventive measures in time, and improve the service life of the equipment.
In short, the maintenance and care of the hot and cold shock test chamber needs to be carried out regularly to ensure its long-term stable operation and the accuracy of the test results. By following the above steps, you can effectively maintain your equipment and extend its service life.
