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| Performance Parameters | |
| Model | CDHL Series Walk-in High and Low Temperature Test Chamber |
| Temperature Range |
-70℃ ~ +150℃
(Customized temperature range available according to customer requirements) |
| Humidity Range | 20%RH ~ 98%RH |
| Temperature Accuracy | ±0.5℃ |
| Humidity Accuracy | ±2.0%RH ~ ±3.0%RH |
| Temperature Uniformity | ≤2.0℃ |
| Humidity Uniformity | ≤5%RH |
| Temperature Fluctuation | ≤±0.5℃ |
| Humidity Fluctuation | ≤±1.0%RH |
| Heating Rate | Approx. 1~3℃/min (Empty chamber) |
| Cooling Rate | Approx. 0.7~1℃/min (Empty chamber) |
| Control Method |
PID intelligent control technology.
Automatic adjustment of heating, cooling, humidification and dehumidification processes. |
| Test Modes | High temperature test, low temperature test, constant humidity heat test, high and low temperature cycling test, temperature and humidity alternating test. |
| Chamber Structure | |
| Structure Type |
Modular assembled walk-in chamber structure.
The chamber size, configuration and functions can be customized according to customer requirements. |
| Chamber Design |
Scientific structural design with excellent thermal insulation performance.
Suitable for large components and complete product environmental testing. |
| Inner Chamber Material |
SUS304 stainless steel plate.
Corrosion resistant, durable and easy to clean. |
| External Material |
Cold rolled steel plate with powder coating surface treatment.
Stainless steel exterior is available as an option. |
| Insulation Material |
High density polyurethane foam insulation.
Standard insulation thickness: 75mm. Provides excellent thermal insulation and energy efficiency. |
| Door Structure |
Heavy-duty insulated double-layer door.
Equipped with high temperature resistant silicone sealing gasket. Optional electric heating function prevents condensation during low temperature operation. |
| Observation Window |
Multi-layer tempered glass observation window.
Optional heating system prevents frost and condensation, allowing clear observation of test samples. |
| Lighting System |
High brightness LED lighting system installed inside the chamber.
Suitable for low temperature and high humidity environments. |
| Cable Port |
Standard Φ50mm cable access port with sealing plug.
Customized cable ports available according to testing requirements. |
| Floor Structure |
Reinforced floor structure designed for heavy test samples.
Suitable for industrial components and large assemblies. |
| Maintenance Space | Sufficient maintenance space should be reserved around the chamber for installation, inspection and daily maintenance. |
| Refrigeration System | |
| Refrigeration Method |
Mechanical refrigeration system with forced air circulation.
Air-cooled or water-cooled refrigeration system available according to installation conditions. |
| Cooling System |
Single-stage refrigeration system or cascade refrigeration system.
Cascade refrigeration is applied for ultra-low temperature requirements. |
| Compressor |
High efficiency industrial refrigeration compressor.
Features stable operation, low vibration and long service life. |
| Compressor Configuration | Multiple compressor configurations available according to chamber size, temperature range and cooling capacity requirements. |
| Refrigerant |
Environmentally friendly refrigerant system.
R404A / R23 or equivalent refrigerants according to temperature requirements. |
| Condenser |
High efficiency condenser with optimized heat exchange design.
Provides stable refrigeration performance under continuous operation. |
| Evaporator |
Efficient evaporator design combined with optimized airflow circulation.
Ensures uniform cooling performance inside the chamber. |
| Expansion Device | Precision refrigeration expansion components ensure stable refrigerant flow and improved energy efficiency. |
| Cooling Capacity Control | Automatic cooling capacity adjustment according to chamber load and temperature requirements. |
| Refrigeration Pipeline | Professional refrigeration pipeline layout with reliable sealing performance. |
| High Pressure Protection | Automatic shutdown protection when abnormal refrigeration pressure occurs. |
| Compressor Protection | Includes compressor overload protection, overheating protection and delayed start protection. |
| Energy Efficiency Design | Optimized refrigeration control logic reduces energy consumption while maintaining stable temperature performance. |
| Humidity System | |
| Humidification Method |
Electric heating humidification system.
High precision humidity control is achieved through automatic adjustment of humidification output. |
| Humidifier Type | Stainless steel electric humidifier with corrosion resistance and stable performance. |
| Dehumidification Method |
Refrigeration dehumidification method.
The system automatically controls moisture removal according to humidity requirements. |
| Humidity Control Range |
20%RH ~ 98%RH.
Suitable for constant humidity and alternating temperature-humidity tests. |
| Humidity Control Method |
Integrated PLC humidity control system.
Automatically adjusts humidification and dehumidification processes. |
| Water Supply System |
Automatic water supply system.
Ensures continuous humidity operation without frequent manual water filling. |
| Water Tank | Independent water tank with automatic water level monitoring function. |
| Water Shortage Protection | Automatic alarm and humidifier protection function when water supply is insufficient. |
| Drainage System | Dedicated drainage system designed for convenient maintenance and cleaning. |
| Humidity Sensor | High precision humidity sensor for accurate humidity measurement and control. |
| Moisture Protection | Optimized humidity system design prevents excessive condensation and improves equipment reliability. |
| Application | Suitable for constant damp heat, alternating damp heat, high and low temperature humidity cycling tests. |
| Control System | |
| Controller |
Industrial PLC programmable controller with color touch screen interface.
Provides stable operation and accurate control of temperature and humidity. |
| Control Method |
PID intelligent control technology.
Automatically adjusts heating, cooling, humidification and dehumidification output according to test conditions. |
| Operation Interface |
High-resolution color touch screen.
Real-time display of temperature, humidity, program status and equipment operation information. |
| Temperature Sensor |
High precision PT100 platinum resistance temperature sensor.
Provides accurate temperature measurement and stable control performance. |
| Humidity Sensor |
High accuracy electronic humidity sensor.
Ensures precise humidity monitoring during testing. |
| Program Setting |
Multi-step programmable testing function.
Supports temperature, humidity and time parameter setting for automatic test cycles. |
| Program Capacity | Multiple test programs can be stored according to customer testing requirements. |
| Data Recording |
Test data recording function.
Historical temperature and humidity data can be exported for analysis. |
| Communication Interface |
RS485 communication interface as standard option.
Ethernet communication and remote monitoring functions are available. |
| Remote Monitoring | Optional remote monitoring system allows users to view equipment status and operating parameters remotely. |
| Alarm Display |
Automatic alarm display with fault information indication.
Helps operators quickly identify abnormal conditions. |
| Control Function | Integrated control of refrigeration system, heating system, humidity system and safety protection system. |
| Air Circulation System | |
| Circulation Method |
Forced air circulation system with optimized airflow design.
Provides stable airflow distribution and excellent temperature uniformity inside the chamber. |
| Fan System |
High efficiency centrifugal circulation fan.
Designed for continuous operation with low vibration and low noise. |
| Airflow Design |
Three-dimensional airflow circulation design.
Ensures uniform temperature and humidity distribution throughout the entire working space. |
| Air Duct Structure |
Scientific air duct design improves airflow efficiency.
Optimized air channels reduce temperature difference inside the chamber. |
| Air Distribution Method |
Balanced air supply and return circulation system.
Suitable for testing large components and multiple samples. |
| Air Velocity Control |
Adjustable airflow design according to different test requirements.
Prevents excessive airflow impact on sensitive samples. |
| Temperature Uniformity Improvement | Optimized circulation structure improves temperature consistency and reduces dead zones inside the chamber. |
| Humidity Uniformity Improvement | Continuous airflow circulation helps achieve stable humidity distribution. |
| Noise Reduction Design | Low-noise fan motor and optimized airflow structure reduce operating noise. |
| Application | Suitable for environmental testing of large electronic components, automotive parts, batteries, aerospace products and industrial equipment. |
| Safety Protection System | |
| Over Temperature Protection |
Independent over-temperature protection device.
Automatically stops heating operation when abnormal temperature conditions occur. |
| Compressor Protection |
Compressor overload protection,
high pressure protection and delayed start protection.
Ensures safe and reliable refrigeration operation. |
| Motor Protection | Protection against fan motor overload and abnormal operation. |
| Electrical Leakage Protection | Electrical leakage protection device installed to ensure operator safety. |
| Over Current Protection |
Circuit overload and over current protection system.
Prevents damage caused by abnormal electrical conditions. |
| Phase Sequence Protection | Phase sequence and phase loss protection for three-phase power supply. |
| Water Shortage Protection | Automatic alarm and protection function when humidification water supply is insufficient. |
| Emergency Stop Function | Emergency stop switch allows immediate shutdown of equipment operation. |
| Alarm System |
Audible and visual alarm indication.
Displays fault information for quick troubleshooting. |
| Electrical System | |
| Power Supply |
AC 380V, 50Hz, Three Phase.
Customized voltage specifications available according to different countries and regions. |
| Electrical Components |
High quality electrical components with reliable performance.
Components are selected according to international industrial standards. |
| Electrical Cabinet |
Independent electrical control cabinet design.
Convenient for operation, inspection and maintenance. |
| Wiring Design | Professional wiring layout with clear identification and safety protection. |
| Grounding Protection | Reliable grounding system to ensure safe equipment operation. |
| Standard Configuration | |
| Observation Window |
Multi-layer tempered glass observation window.
Optional heating function prevents frost and condensation during low temperature operation. |
| Interior Lighting |
LED lighting system installed inside the chamber.
Provides clear visibility during testing. |
| Cable Access Port |
Standard Φ50mm cable port with sealing plug.
Customized cable ports available according to test requirements. |
| Test Shelf |
Heavy-duty stainless steel test shelves.
Shelf quantity and loading capacity can be customized according to chamber size. |
| Documentation | Operation manual, electrical schematic diagram, inspection certificate and related technical documents. |
| Applicable Test Standards | |
| High Temperature Test |
GB11158 High Temperature Test Chamber Technical Conditions
GJB150.3 High Temperature Test |
| Low Temperature Test |
GB10589-89 Low Temperature Test Chamber Technical Conditions
GB/T2423.1-2001 Low Temperature Test Method GJB150.4 Low Temperature Test |
| Humidity Test |
GB/T10586-89 Damp Heat Test Chamber Technical Conditions
GB/T2423.3-93 Damp Heat Test Method GJB150.9 Humidity Test |
| Temperature Change Test |
GB/T2423.22 Temperature Change Test
GB/T2423.4-93 Alternating Damp Heat Test Method |
| Application Industries | |
| Main Applications | Environmental reliability testing for large components and products. |
| Industries | Consumer electronics, optical industry, biotechnology, medical industry, aerospace, semiconductor, communication, automotive, information technology and scientific research institutions. |
| Typical Applications | Electronic products, battery products, LED components, plastic materials, automotive parts, metal materials and industrial assemblies. |
| Installation Environment | |
| Ambient Temperature | 5℃ ~ 35℃ |
| Ambient Humidity | ≤85%RH |
| Installation Requirements |
Install in a dry, ventilated area.
Reserve sufficient space for operation, maintenance and heat dissipation. |
| Service & Customization | |
| Customization | Chamber dimensions, temperature range, humidity range and functional configuration can be customized. |
| Technical Support | Professional technical consultation, application support and operation guidance provided by Chendun. |
| After Sales Service | Spare parts supply, maintenance guidance and long-term technical service support. |