Hanging Basket Type Two-Chamber Impact Test Chamber

Basket-Type Two-Chamber Thermal Shock Test Chamber (also known as a two-chamber thermal shock test chamber or basket-type thermal shock test chamber) is a professional testing device used to evaluate the resistance of materials, components, and complete products to rapidly changing high and low temperature environments. It is widely used in electronics, automotive, aerospace, industrial, and other fields. The following provides a detailed introduction from four aspects: structural principle, performance characteristics, application scenarios, and selection recommendations:

I. Structural Principle

Dual-Chamber Design

High-Temperature Zone: Located in the upper part of the device, it achieves a high-temperature environment (typically up to +150°C to +200°C) through electric heaters or hot air circulation systems.

Low-Temperature Zone: Located in the lower part of the device, it uses a cascade refrigeration system (such as binary cascade refrigeration) to achieve a low-temperature environment (typically down to -40°C to -75°C).

Basket System: Samples are fixed in a vertically movable basket, which is driven by a cylinder via steel cables or chains to enable rapid switching between the high-temperature and low-temperature zones (transition time typically ≤10 seconds).

Sealing and Insulation

Top Sealing: When the basket rises, it forms a seal with the high-temperature zone partition through its own weight, with silicone sealing strips and glass fiber insulation ensuring thermal insulation.

Bottom Sealing: When the basket descends, cylinder tension presses it tightly against the low-temperature zone partition, using materials suitable for low-temperature environments (e.g., low-temperature-resistant rubber).

Insulation Layer: The chamber body uses high-strength PU foam or insulation cotton to reduce heat loss and improve temperature uniformity.

Control System

Temperature Control: Utilizes PID auto-tuning control combined with PT-100 temperature sensors to achieve high-precision temperature regulation (fluctuation ≤ ±0.5°C, deviation ≤ ±2.0°C).

Damper Switching: Pneumatic or electric dampers enable rapid isolation between the high-temperature and low-temperature zones, shortening temperature recovery time (typically ≤5 minutes).

Safety Protection: Equipped with over-temperature protection, leakage protection, compressor overload protection, and other devices to ensure safe operation.

II. Performance Characteristics

High Efficiency and Energy Savings

The basket-type design reduces thermal load during thermal shock, shortens temperature recovery time, and consumes less energy compared to three-chamber devices.

The binary cascade refrigeration system improves low-temperature cooling efficiency and reduces operating costs.

Rapid Temperature Change

Short sample transition time (≤10 seconds) and fast temperature recovery time (≤5 minutes) meet high-efficiency testing requirements.

Heating rate: from +60°C to +200°C in ≤30 minutes; cooling rate: from +25°C to -55°C in ≤50 minutes.

Compact Structure

The device has a small footprint, making it suitable for laboratories or production lines with limited space.

Modular design facilitates installation, maintenance, and upgrades.

User-Friendly Operation

Touch-screen interface supports Chinese and English menus, with programmable control for temperature, number of shocks, cycle modes, and other parameters.

Features automatic defrosting, scheduled startup, fault self-diagnosis, and other functions to simplify operation.

III. Application Scenarios

Electronics and Electrical Appliances Industry

Testing the resistance of electronic components (e.g., chips, capacitors, resistors) in devices like mobile phones, computers, and cameras to high and low temperature cycles.

Evaluating the soldering reliability of printed circuit boards (PCBs) under thermal expansion and contraction.

Automotive Industry

Inspecting the performance stability of automotive components (e.g., sensors, connectors, battery packs) under temperature variations.

Simulating high-temperature scenarios like engine compartments and in-vehicle electronic devices, as well as low-temperature shocks during startup in cold regions.

Aerospace

Verifying the structural integrity of aircraft materials (e.g., composites, coatings) under rapid temperature changes.

Testing the thermal adaptability of equipment such as missiles and satellites during launch and in space environments.

New Material Development

Evaluating the physical properties of materials like metals, plastics, and ceramics under temperature variations (e.g., expansion coefficient, strength changes).

Studying the aging mechanisms of polymer materials under thermal and cold shocks.

IV. Selection Recommendations

Temperature Range

Choose the extreme temperatures of the high-temperature zone (e.g., +150°C to +200°C) and low-temperature zone (e.g., -40°C to -75°C) based on testing requirements.

Confirm whether the device supports custom temperature shock curves (e.g., step heating/cooling).

Sample Capacity

Select the basket size (e.g., 25×25×25cm to 60×60×60cm) based on sample dimensions, ensuring sufficient spacing between samples and the chamber walls to improve temperature uniformity.

Consider the device’s total load capacity (e.g., temperature recovery time under a 5kg plastic load).

Control Method

Prioritize devices with touch screens, programmable controls, and data logging functions for easier experiment management and result analysis.

Confirm whether the device supports RS-232/RS-485 communication interfaces for integration with computers or automated systems.

Basket-Type Two-Chamber Thermal Shock Test Chamber Safety and Maintenance

Check if the device is equipped with safety features such as over-temperature protection, leakage protection, and compressor overload protection.

Understand the refrigeration system type (e.g., cascade refrigeration) and compressor brand to ensure long-term stability.

Confirm maintenance cycles (e.g., condenser cleaning, seal replacement) and after-sales service support.