Cold and hot cycle impact test chamberAs a key equipment for simulating temperature environment changes and detecting product performance reliability, its stable operation is crucial. However, frequent power outages can cause serious harm to it in multiple ways.

1、 Damage to electrical system

1. Damage to electronic components: During frequent power outages, momentary voltage fluctuations can have a strong impact on the electronic components inside the test chamber. For example, integrated circuits, resistors, capacitors, and other components on the motherboard may be broken down during voltage transients due to excessive voltage or current. Once these critical electronic components are damaged, the control system of the test chamber will not function properly, resulting in the failure of temperature control, parameter settings, and other functions.

2. Relay failure: Relays are used in the test chamber to control the on/off of circuits, and frequent power outages cause the relays to operate frequently. At the moment of each power outage or power outage, the relay contacts will generate an arc, and prolonged and frequent arc action can cause contact erosion and adhesion. If the relay malfunctions, it may not be able to accurately control the start and stop of cooling, heating, and other equipment, affecting the temperature regulation function of the test chamber.

2、 Refrigeration and heating system malfunction

1. Compressor damage: The compressor in the refrigeration system is the core component. Frequent power outages can cause the compressor motor to start frequently in a short period of time. Every time it starts, the motor needs to overcome significant resistance, and the starting current is several times the normal operating current. This will cause the compressor motor winding to overheat, accelerate the aging of insulation materials, and shorten the service life of the motor. In severe cases, the motor may burn out due to overheating, causing the refrigeration system to malfunction and making it impossible to simulate a low-temperature environment.

2. Heating tube damage: The heating tube of the heating system is in a high temperature state during operation. Frequent power outages cause rapid temperature changes in the heating tube, and this frequent alternation of thermal expansion and contraction can lead to fatigue of the resistance wire inside the heating tube, making it prone to breakage. Once the heating tube is damaged, the test chamber will not be able to heat up normally, affecting the simulation of high temperature environment, and thus unable to complete the complete cold and hot cycle impact test.

3、 Temperature control accuracy decreases

1. Sensor deviation: Temperature sensors are used to monitor the temperature inside the test chamber in real time and provide feedback to the control system to adjust the temperature. The electromagnetic interference generated by frequent power outages may cause deviations in the measurement data of temperature sensors. For example, sensors may misjudge temperature, causing the control system to receive incorrect signals and issue inaccurate temperature adjustment commands, resulting in the actual temperature inside the test chamber not matching the set temperature and reducing the accuracy of the test results.

2. Control algorithm disorder: The temperature control of the test chamber relies on precise control algorithms. Frequent power outages may disrupt the operational logic of the control system and cause control algorithms to become disordered. The control system is unable to accurately adjust the operating power of the refrigeration and heating equipment based on the difference between the actual temperature and the set temperature, resulting in excessive temperature fluctuations and inability to maintain a stable test temperature environment.

4、 Increased wear and tear of mechanical components

1. Fan and motor wear: The fan inside the test chamber is used for air circulation to ensure uniform temperature inside the chamber. Frequent power outages cause the fan motor to start and stop frequently, leading to increased friction between the motor shaft and bearings and resulting in bearing wear. At the same time, during the rapid start and stop process, the impact force on the fan blades increases, which may cause deformation, loosening, and other problems. This not only affects the air circulation effect, but may also cause abnormal vibrations and noise.

2. Loss of transmission components: Some test chambers have transmission components, such as transmission devices used for moving sample racks or opening and closing test chamber doors. Frequent power outages lead to frequent starting and stopping of these transmission components, exacerbating wear between gears, chains, and other components. Over the long term, the accuracy of transmission components may decrease, leading to issues such as poor transmission and positional deviation, which can affect the normal operation of the test chamber and the stability of the testing process.

Frequent power outagesCold and hot cycle impact test chamberThe electrical system, refrigeration and heating system, temperature control accuracy, and mechanical components can all pose serious hazards. To ensure the normal operation of the test chamber and the reliability of the test results, frequent power outages should be avoided as much as possible, or protective equipment such as uninterruptible power supply (UPS) should be equipped for the test chamber.