Something about walk-in high and low temperature chamber

 

How does the automation control system of the walk-in high and low temperature chamber work ?


1. Sensor acquisition: Firstly, the system will use a temperature sensor to monitor the temperature inside the test chamber and convert the temperature value into an electrical signal. These sensors can monitor the temperature changes inside the test chamber in real time, ensuring the accuracy of the data.

 

2. Signal processing: Next, the electrical signal is sent to the controller for processing. The controller calculates the amplitude that needs to be adjusted based on the preset temperature target value and the current temperature value to achieve the set temperature target.

 

3. Control calculation: The controller will adjust the operating status of the refrigeration unit or heater through PID (Proportional Integral Differential) control algorithm based on the calculation results to achieve accurate temperature control. The PID control algorithm can effectively regulate the temperature to stabilize it around the set value.

 

4. Actuator control: Finally, the controller will command the refrigeration unit or heater and other executing devices to operate according to the calculated adjustment amplitude, thereby changing the temperature inside the test chamber. For example, an electronic expansion valve can adjust the operating status of the compressor through a stepper motor drive to achieve the best energy-saving effect.

 

In addition, the walk-in high and low temperature laboratory is also equipped with various safety protection functions, such as over temperature protection and refrigeration machine phase loss protection. These functions can be activated in a timely manner in case of abnormal situations, preventing equipment damage and ensuring personnel safety.

 

When conducting high and low temperature tests, ensuring the accuracy and repeatability of test results requires comprehensive consideration of multiple factors. 

Here are some key measures:

1. High precision temperature control system: Choose a test chamber with an advanced temperature control system, which can achieve high-precision temperature control and stability, thereby ensuring the accuracy and repeatability of experimental results. For example, some high-quality high and low temperature test chambers can control the temperature control accuracy within ± 1 ℃, which helps to better simulate the temperature environment of the product in actual use.

 

2. Follow operating procedures: Strictly follow the operating procedures of the test chamber to avoid personal injury or equipment damage caused by misoperation. This includes wearing appropriate protective clothing during high-temperature testing to prevent burns, and avoiding opening the chamber door when working below 0 ℃ to prevent frost and ice formation in evaporator and other parts, which can reduce equipment performance.

 

3. Constant temperature and humidity control: Some models of test chambers have the function of constant temperature and humidity control, which can simulate the environmental conditions in actual use. This is very important for improving the accuracy and repeatability of test results.

 

4. Manufacturing standards and quality control: Choosing a test chamber that meets industry manufacturing standards directly affects the performance, stability, and reliability of the laboratory, which in turn affects the accuracy and repeatability of experimental results.

 

5. Optimize temperature control system: Optimize the temperature control system to improve its performance and stability. This includes regularly calibrating temperature sensors and adjusting control parameters to ensure that the temperature control system is always in optimal condition.

 

What are the application cases of walk-in high and low temperature chamber in wet heat cycle tests?


1. The rail transit communication industry: The walk-in high and low temperature aging laboratory has been widely used in the rail transit communication industry. This laboratory is able to cope with environmental challenges in different climate regions around the world through precise temperature and humidity control. In testing cases for equipment in high-altitude areas, even at extreme low temperatures of -40 ° C, the indoor temperature uniformity can be maintained within the range of 2 ° C, ensuring testing accuracy and equipment reliability.

 

2. Aviation, automotive, home appliances, and scientific research fields: The walk-in high and low temperature alternating humidity and heat test room is an essential testing equipment in these fields, used to test and determine the performance and reliability of electrical, electronic, and other products and materials undergoing high temperature, low temperature, alternating humidity and heat or constant testing.

 

3. Industries such as pharmaceuticals, textiles, food processing, and electronics: The walk-in high and low temperature cycle chamber provides various simulated environmental conditions required for these industries, widely applicable for quality and reliability testing.

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