Freeze thaw cycle test chamber
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Standards
(1)GB/T 9535 Crystalline Silicon Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
(2)GB/T 18911 Photovoltaic Modules – Environmental Test Methods
(3)GB/T 2423.1 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test A: Cold
(4)GB/T 2423.2 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test B: Dry Heat
(5)GB/T 2423.3 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test Ca: Damp Heat, Steady State
(6)IEC 61215 Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
(7)IEC 61730 Photovoltaic (PV) Module Safety Qualification
(8)IEC 60068-2-1 / IEC 60068-2-2 / IEC 60068-2-30 Environmental Testing – Cold, Dry Heat, Damp Heat
(9)UL 1703 Standard for Flat-Plate Photovoltaic Modules and Panels
(10)JIS C 8918 Environmental Test Methods for Photovoltaic Modules (partially applicable)
Parameters
| Item | Technical Specification |
|---|---|
| Temperature range | -40 ℃ to 85 ℃ |
| Temperature fluctuation | ≤ ±1 ℃ |
| Temperature deviation | ≤ ±1 ℃ |
| Temperature uniformity | ≤ ±2 ℃ |
| Heating and cooling rate | Compliant with IEC 61215 requirements |
| Humidity range | 30 %RH to 98 %RH |
| Relative humidity deviation | ±3 %FS; 85 ±2 %RH; 90 ±2 %RH |
| Humidity fluctuation | ±2 %RH |
| Humidity uniformity | ≤ 2 %RH |
| Temperature change rate | ≤ 100 ℃/h |
| Extreme temperature dwell time | ≥ 10 min |
| Test cycle count | 200 cycles or 50 cycles |
| Maximum sample capacity | 12 photovoltaic modules |
| Inner chamber dimensions | Approx. 1.5 × 2.5 × 1.5 m (L × W × H) |
| Outer chamber dimensions | Approx. 2.5 × 3.0 × 2.5 m (L × W × H) |
| Power supply | AC 380 V / 60 Hz |
Features
High-precision temperature and humidity control system meeting stringent photovoltaic testing requirements
Supports both thermal cycling and damp heat freeze test modes, covering all relevant IEC 61215 clauses
Independent closed-loop control of temperature and humidity ensures fast response and stable operation
Large chamber volume enables simultaneous testing of multiple large-size photovoltaic modules
Touchscreen programmable control supports multi-step program editing and cyclic operation
Real-time display of setpoint and actual curves ensures intuitive monitoring and data traceability
Power failure memory and automatic recovery functions maintain test continuity
Environmentally friendly refrigeration system with reliable operation and low maintenance cost
Accessories
(1)Programmable control system with touchscreen interface
(2)High-precision industrial-grade temperature and humidity sensors
(3)Refrigeration compressor unit using environmentally friendly refrigerant
(4)Photovoltaic module sample racks compatible with multiple module sizes
(5)Drainage and condensation management system
(6)Optional data acquisition and management software for PC connection and data export
(7)Optional remote monitoring module for operation status viewing
(8)Consumable sealing strips for periodic replacement
(9)Humidity water filtration components to ensure humidification water quality
Test Procedures
Inspect photovoltaic modules to confirm no visible mechanical damage before testing
Install modules on the sample racks, ensuring uniform stress distribution and secure fixation
Set thermal cycling parameters according to applicable standards, including heating and cooling rates and dwell times
Initiate the test program; the system automatically performs high-temperature hold, cooling, low-temperature hold, and heating stages
For damp heat freeze testing, ensure the humidification system operates with qualified water quality
Avoid frequent door opening during high and low temperature operation to prevent thermal shock
After completion, allow the chamber temperature to return to a safe range before removing samples
Maintenance Information
Regularly inspect temperature and humidity sensors to ensure measurement accuracy
Check refrigeration and humidification systems for stable operation and proper refrigerant performance
Clean drainage and condensation systems to prevent water accumulation inside the chamber
Periodically inspect door seals and replace consumable sealing strips when necessary
Verify control system operation and backup parameters to ensure reliable long-term testing
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