High and Low Temperature Thermal Shock Chamber

The HLST Series High-Low Temperature Thermal Shock Chamber is an environmental simulation device independently developed by LISUN specifically for temperature shock and rapid temperature change testing. It is divided into two main structures: “Two-Chamber Type (Type D)” and “Three-Chamber Type (Type T)”, capable of achieving instantaneous temperature switching within a wide temperature range of -50℃ to 150℃. By adopting basket shuttle technology (for Two-Chamber Type) or airflow switching technology (for Three-Chamber Type), the device accurately reproduces extreme temperature difference environments. Equipped with imported core components and an intelligent control system, the HLST Series also features multiple safety protection and monitoring functions, balancing testing efficiency and operational safety. Suitable for applications ranging from small-sample testing in laboratories to batch product verification on production lines, it provides a scientific basis for product R&D, quality inspection, and compliance certification across various industries.

Working Principle:

Two-Chamber Type (Type D)
The Two-Chamber Type (Type D) is composed of an independent high-temperature chamber and an independent low-temperature chamber, with a supporting movable sample basket (samples are fixed inside the basket). During the test, the automatic shuttle mechanism of the basket drives the samples to switch rapidly between the high-temperature chamber and the low-temperature chamber:
When high-temperature shock is required, the basket sends the samples into the high-temperature chamber that has completed preheating.
When low-temperature shock is required, the basket then transfers the samples to the low-temperature chamber that has completed pre-cooling.
Through this process, the samples are exposed to high and low temperature environments instantaneously, simulating the temperature shock effect.

Three-Chamber Type (Type T)
The Three-Chamber Type (Type T) is divided into three main chambers: a high-temperature chamber, a low-temperature chamber, and an independent test chamber. During the testing phase, samples are only placed in the independent test chamber (without direct contact with the high-temperature or low-temperature chamber). Rapid temperature shock is achieved through the “chamber pre-temperature + airflow switching” method, following these steps:
• Preparation Phase: The high-temperature chamber completes air preheating in advance, while the low-temperature chamber synchronously completes air pre-cooling, with both reaching their preset high and low temperature target values respectively.
• Low-Temperature Shock (High-to-Low Temperature Test): The system guides the pre-cooled air from the low-temperature chamber into the independent test chamber, and the air temperature inside the test chamber drops rapidly to the low-temperature target value within the preset “recovery time”.
• High-Temperature Shock (Low-to-High Temperature Test): The system switches the airflow, guiding the preheated air from the high-temperature chamber into the independent test chamber. The air temperature inside the test chamber rises rapidly to the high-temperature target value within the same “recovery time”. This cycle is repeated to achieve the alternating high-low temperature shock test.

Specification:
• Refrigeration and Heating System: Refrigeration adopts fully hermetic compressors from France’s TECUMSEH / Germany’s Bitzer (in a cascade refrigeration mode). Heating relies on an independent nickel-chromium alloy electric heater, ensuring high and stable heating/cooling efficiency.
• Circulation and Cooling Methods: Equipped with a temperature-resistant, low-noise air-conditioning motor + multi-blade centrifugal wind wheel to ensure uniform airflow inside the chamber. Cooling methods are divided into air cooling (for small-volume models) and water cooling (for large-volume / wide low-temperature range models), adapting to different working conditions.
• Materials and Insulation: The exterior is made of high-quality carbon steel (with phosphate electrostatic spraying), and the interior uses SUS304 stainless steel plates. The insulation layer adopts rigid polyurethane foam + fine glass fiber cotton, providing excellent thermal insulation performance.
• Control System: Equipped with a self-developed color LCD touchscreen. It supports a temperature accuracy of 0.1℃ and an indication accuracy of 0.1℃, and can set test durations ranging from 0.1 to 999.9 H/M/S, enabling easy operation.
• Sensor: Uses a platinum resistance PT100Ω/MV temperature sensor, which has strong anti-interference capability.
Safety Protection: Integrates leakage protection, short-circuit protection, heating tube overheating protection, motor overheating protection, and compressor overpressure/overcurrent protection, providing comprehensive protection for equipment and test safety.

Note:
For the model HLST-100D-, the “” can be selected from three temperature ranges marked as A/B/C. For example:
• In the LISUN model HLST-100D-B, “D” indicates the Two-Chamber Type, and “B” represents the shock temperature range of -40℃ ~ 150℃;
• In the model HLST-500T-C, “T” indicates the Three-Chamber Type, and “C” represents the shock temperature range of -50℃ ~ 150℃.
In addition, customization is available for special working chamber dimensions and shock temperature ranges according to customer requirements.

Typical Applications
• Aerospace Industry: Tests the structural stability of satellite components and aero-engine parts under rapid temperature differences between “high-altitude low temperature and ground high temperature”, such as aluminum alloy frames and electronic navigation modules. It complies with the standards of GJB 150.5A-2009 and MIL-STD-883H.
• Electronic Components Industry: Evaluates the electrical performance of chips, sensors, and PCB boards under temperature shocks ranging from -50℃ to 150℃. For example, it verifies the switching reliability of automotive MCU chips between low-temperature startup in winter and high-temperature operation in summer, in line with ISO 16750-4:2018.
• Automotive Industry: Aims at in-vehicle displays, battery packs, and lamp components, simulating temperature shocks of “-40℃ (severe cold) to 85℃ (exposure to intense sunlight)”. It detects the sealing performance of components and the brittle fracture resistance of materials, meeting the requirements of automotive electronics climate load testing.
• Materials Industry: Tests the temperature shock resistance of materials such as plastics, metals, and glass. For instance, it assesses the crack resistance of mobile phone glass covers under extreme temperature differences, complying with ASTM E186-2021.
• Military and Precision Instrument Industry: Verifies the functional stability of military communication equipment and medical diagnostic instruments in rapidly changing temperature environments. For example, it ensures that radar components work normally under day-night temperature differences on the battlefield, adapting to the standard of IEC 60068-2-14:2009.
• Third-Party Testing Institutions: Provides enterprises with temperature shock testing services that meet multiple standards such as GB, IEC, and MIL-STD, and issues authoritative test reports. These reports support product exports (e.g., CE, UL certification) and industry access reviews.

High and Low Temperature Thermal Shock Chamber