The precise environmental simulation capability of the temperature and humidity test chamber relies on a modular structure design of "chamber base + functional systems + control system". All components work in synergy to achieve accurate regulation and stable maintenance of temperature and humidity. The core structure is divided into the following parts:
I. Chamber Basic Structure: Core of Environmental Bearing
1. Inner Tank: As the core carrier of the test area, it is usually made of SUS 304 stainless steel for excellent corrosion resistance and easy cleaning. The smooth inner wall is equipped with one or two axial fans (quantity depends on test chamber volume), which circulate air inside the chamber to ensure uniform airflow distribution. For some models, the inner tank is treated with anti-condensation technology to prevent water dripping from affecting test results.
2. Outer Shell: Mainly constructed from galvanized steel sheets with electrostatic powder coating, it serves as protection and thermal insulation. The gap between the outer shell and inner tank is filled with dense mineral wool to minimize heat exchange between the inside and outside of the chamber, reducing energy consumption.
3. Chamber Door & Door Seal: The door is fitted with multi-layer heated glass, which allows real-time observation of test status; the heating and defrosting function prevents glass fogging. A silicone door seal is attached to the inner side of the door to ensure airtightness and avoid temperature/humidity leakage.
4. Shelves: Height-adjustable stainless steel shelves are designed for placing test samples. They ensure unobstructed air circulation around samples and do not interfere with internal airflow.
II. Temperature Control System
1. Heating Assembly: Installed near the air duct of the inner tank, it features electric heating tubes as the core component. With high temperature resistance and uniform heat generation, the tubes directly supply heat to the internal air and respond to heating commands from the controller.
2. Refrigeration System: Air conditioning components are integrated into the air handling system at the rear of the test chamber. Circulating air is cooled when passing through a heat exchanger. The condenser is generally air-cooled, with a water-cooled option available.
III. Humidity Control System
A. Humidification Device
l Electrode-type Humidifier: Consists of electrode rods and a humidification water tank (for storing distilled/deionized water). Steam is generated by heating the water when the electrode rods are energized.
B. Dehumidification Device
l Refrigeration Dehumidification Module: Linked with the evaporator, it achieves dehumidification through cooling and condensation.
l Drainage PipeCollects condensed water and discharges it outside the chamber to maintain inner tank dryness.
IV. Operation & Control System
1. Operators can send commands to the Labcompanion controller via the color LCD touchscreen to control the test chamber. Intuitive graphic symbols enable a user-friendly interface, simplifying operation without requiring additional instructions.
2. The Labcompanion controller is a self-monitoring, 32-bit digital measurement and control system specifically designed for test system applications.
Key Features
l Height-adjustable color LCD touchscreen for flexible operation.
l The program memory can store 100 test programs, with a total of up to 1000 program steps, supporting 250 program step cycles and 9999 program cycles.
l Software supports non-voltage input/output switches.
l Integrated temperature and humidity limit monitoring system.
l Connectable to host server systems via RS232-C serial interface or to network systems via TCP/IP.
l Switchable Chinese/English interface.
In summary, the structural design of the test chamber is centered on precision control, stable operation and reliability, with all components corresponding to the temperature/humidity control principles. Understanding the core components facilitates efficient equipment maintenance and troubleshooting.
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