In the field of environmental reliability testing, countless engineers have faced a tricky challenge: carefully developed product prototypes, complete machines, and even system-level equipment cannot fit into standard-sized rapid temperature change test chambers due to their excessive dimensions. From meter-long power battery packs and full-rack AI servers to aerospace cabin sections and other large components, the limited volume of standard chambers has become the biggest bottleneck hindering test progress.
"Cannot test, no way to test, or outsourcing testing is expensive and untrustworthy" — this is the real dilemma of testing large test pieces. With more than 20 years of experience in custom non-standard solutions, Lab Companion offers a straightforward solution: no compromise on "standard sizes", only reliable "tailor-made" adaptations to ensure accurate testing for every large test piece.
I. Why Do Large Test Pieces Require a "Walk-In" Chamber?
As the name suggests, a walk-in rapid temperature change test chamber is a large environmental testing chamber that people can easily enter. It breaks the limitations of traditional test chambers' "open door - place sample - close door" mode, creating an exclusive testing space that can accommodate complete machines, full racks, and even small equipment, perfectly meeting the testing needs of large test pieces.
Which products urgently need walk-in testing solutions?
• New Energy Field: Power battery packs (often over 1.5m×1m×0.5m in size), energy storage container modules
• AI Computing Infrastructure: Full-rack GPU servers, liquid-cooled cabinets (over 42U in height)
• Automotive Electronics: Complete automotive cockpit domain controllers, on-board charger assemblies
• Military and Aerospace: Missile cabin sections, satellite components, airborne radar radomes
• Large Industrial Equipment: Wind power converters, rail transit traction converters
These products share common characteristics: large size, heavy weight, and high heat generation. Ordinary rapid temperature change chambers cannot accommodate them at all; even if barely fit, they will seriously affect the uniformity of the temperature field and the authenticity of the temperature change rate, failing to meet the strict testing standards.
II. Lab Companion's Walk-In Rapid Temperature Change Chamber: Spacious, Testable, and More Accurate
To address the pain points of testing large test pieces, Lab Companion has launched the Walk-in Series of rapid temperature change test chambers, with a volume range of 1000L~10000L (1m³~10m³), which can be further expanded to larger non-standard sizes according to customer needs. This is not a simple scaling up of standard chambers, but a comprehensive redesign from structure, refrigeration, air duct to control system to ensure uncompromised testing performance.
1. "Custom-Made" Sizes, No Limitations in Adaptation
Lab Companion's technical team will accurately design the internal net size of the chamber based on the core needs provided by the customer, such as the maximum size of the test piece, placement method (single/multiple pieces), and access method (forklift, trolley, hoisting). For extra-long test pieces over 4 meters, a through-type or double-door structure can be customized to realize assembly line testing where the test piece enters from one end and exits from the other. For extra-high test pieces, a top hoisting port or side large flip door can be designed to completely solve the core problem of "cannot be placed in or taken out".
2. Split Structure: Quiet Operation, Convenient Maintenance Without Interrupting Work
Walk-in chambers are large in size. If the refrigeration unit is integrated on the top or side of the chamber, it will not only increase the chamber height but also generate severe operating noise and affect heat dissipation efficiency. Lab Companion adopts a split structure design, where the refrigeration unit is independently placed outdoors or in a dedicated machine room and connected to the chamber through thermal insulation pipelines. The advantages are obvious:
• Quiet and Comfortable: Noise sources such as compressors and fans are far away from the operation area, greatly reducing laboratory noise and ensuring a comfortable operating environment.
• Efficient Maintenance: When maintaining the refrigeration system, there is no need to empty the test pieces in the chamber, realizing simultaneous testing and maintenance without delaying production progress.
• Stable Refrigeration: The unit is placed outdoors or in a well-ventilated area, with better heat dissipation conditions, effectively ensuring stable and long-lasting refrigeration efficiency.
3. Special Optimization of Air Duct System, ±1.5℃ Uniform Temperature Field Even in Large Spaces
The core technical difficulty of large walk-in chambers lies in ensuring temperature uniformity in large spaces — excessive space is prone to air short-circuiting, resulting in the phenomenon of "hot corners and cold center" and affecting the accuracy of test data. Lab Companion adopts a multi-point three-dimensional air supply design, arranging multiple adjustable air outlets on both sides or the rear of the chamber, combined with high-power centrifugal fans and deflectors to form a forced convection cycle, ensuring uniform coverage of the temperature field. Test data shows that under full load conditions, the temperature uniformity of Lab Companion's walk-in rapid temperature change chamber is ≤±1.5℃ (better than the industry's common ±2℃ standard), and the temperature fluctuation is ≤±0.5℃, fully complying with the strict requirements of various industry standards such as GJB and IEC for testing large test pieces.
4. Uncompromised Rapid Temperature Change: 5~15℃/min, Accurate Even Under Load
Most large environmental chambers on the market can only achieve constant temperature or slow temperature change, while Lab Companion's walk-in series comes standard with rapid temperature change function, with a temperature change rate of 5℃/min, 10℃/min, 15℃/min (measured under full load). This is due to Lab Companion's self-developed high-power two-stage compression refrigeration system and efficient heat exchanger design. Even if a large number of metal test pieces are stacked in the chamber (such as 1000kg aluminum ingots as simulated load), the equipment can still stably maintain the set temperature change rate, completely avoiding the industry pain point of "fast under no load, slow under full load" and ensuring the authenticity and effectiveness of test data.
5. Wide and Expandable Temperature Range, Adapting to Extreme Testing Needs
Under standard configuration, the temperature range of Lab Companion's walk-in rapid temperature change chamber covers -70℃~+150℃, which can meet the testing needs of most industries. If customers have special scenario requirements (such as polar environment simulation, high-temperature aging testing), it can be customized and expanded to -100℃~+200℃; for scenarios requiring extremely fast cooling (such as HASS screening), a liquid nitrogen auxiliary refrigeration system can also be equipped to increase the cooling rate to more than 30℃/min, fully adapting to various extreme testing scenarios.
III. More Than "Large", It Also Combines Intelligence and Safety
Large test pieces are often expensive, and the safety of the testing process is one of the customers' core demands. Lab Companion's walk-in series is equipped with multiple safety protection systems to fully protect the safety of test pieces and personnel:
• Independent Studio Over-Temperature Protector: Completely separated from the control circuit, it cuts off the heating power supply in milliseconds once over-temperature occurs, eliminating potential safety hazards.
• Multiple Compressor Protections: Comprehensive monitoring of various abnormalities such as high pressure, low pressure, overload, phase loss, and oil pressure difference to ensure stable operation of the equipment.
• Dual Over-Temperature Protection for Heating System: Prevents continuous heating caused by breakdown of solid-state relays, further improving equipment safety.
• Safety Door Lock Design: Cannot be opened from the inside during testing (to prevent accidental door opening), and is equipped with an internal emergency unlocking device to balance safety and emergency response.
• Smoke Alarm and Automatic Fire Extinguishing (Optional): For flammable test pieces such as lithium batteries, it can be directly connected to the fire protection system to achieve early risk detection and disposal.
In terms of intelligence, Lab Companion's walk-in chamber is equipped with the Q8 series large-screen controller, supporting multi-segment program editing, real-time display of temperature and humidity curves, and storage of 100,000 test data points. Data can be exported to PDF/Excel format via USB or Ethernet, perfectly meeting the data traceability requirements of CNAS laboratories. It also supports 4G remote monitoring, allowing engineers to check the equipment operation status, receive alarm information, and even modify test parameters remotely anytime and anywhere, greatly improving testing efficiency.
IV. Real Case: 20m³ Walk-In Rapid Temperature Change Chamber for an Aerospace Institute
Take the 20m³ walk-in rapid temperature change chamber customized by Lab Companion for an aerospace research institute as an example. This equipment is used for the full-machine temperature cycle screening (ESS) of satellite cabin components, with clear core customer requirements:
• Internal Dimensions: 3.5m (length) × 2.5m (width) × 2.3m (height)
• Temperature Range: -55℃~+85℃
• Temperature Change Rate: Average 10℃/min throughout the process
• Test Piece Parameters: Maximum weight 800kg, self-heating about 8kW
After on-site survey and accurate calculation of heat load, the customized solution finally delivered by Lab Companion includes: split refrigeration unit (placed in an outdoor dedicated machine room), air distribution of multi-point side wall air supply + top air return, electric sliding door (convenient for forklift access), anti-static floor and multi-point grounding terminals in the chamber, as well as remote monitoring and data traceability system.
After delivery, the equipment has been operating stably for 18 months with zero failure rate. Under full load, the measured temperature change rate reaches 10.2℃/min, and the temperature uniformity is ≤±1.2℃, exceeding customer expectations. The test director of the institute commented: "Previously, we could only disassemble the cabin into components for separate testing, which was time-consuming and labor-intensive and could not simulate the full-machine thermal effect; Lab Companion's walk-in solution allowed us to achieve ESS screening at the full cabin level for the first time, increasing testing efficiency by more than 3 times."
V. From "Cannot Test" to "Test Freely", Lab Companion Breaks the Limitations of Large Test Piece Testing
Lab Companion deeply understands that behind every large test piece lies a major responsibility related to product reliability, customer trust, and even public safety. Therefore, we refuse to limit customers' testing needs with "standard sizes". Instead, based on more than 20 years of experience in non-standard customization, we use flexible, accurate, and reliable customized solutions to adapt to the testing needs of every large product, making testing of large test pieces no longer limited and helping customers achieve product quality upgrading.
As core equipment for industrial testing, the customization level of walk-in environmental test chambers directly determines testing accuracy and efficiency. This article breaks down the entire process from requirement communication to final delivery, helping enterprises clearly grasp the key nodes of customization.
1. Accurate Requirement Communication: Clarify Core Parameters
The first step in customization is to define core technical parameters, which lay the foundation for subsequent design.
Size Range: Covering small test spaces of 4m³ to large walk-in test chambers of 260m³, the size should be determined based on the volume, quantity of test samples and operational space requirements.
Temperature & Humidity Range: It can generally achieve temperature control of -70℃~+180℃ and humidity control of 30%R.H~98%R.H. For special scenarios, the range can be further expanded to -73℃~+177℃ (integral type).
Control Method: Multiple options are available, from basic microchip LED displays to PLC programmable logic controller touch screens, and can also be upgraded to remote centralized control systems to meet different operation and management needs.
Structure Type: Selection should be based on application scenarios, with parameters of three mainstream types as follows:
Test Type
Temperature Range
Humidity Range
Temperature Change Rate
Integral Type
-73℃~+177℃
30%~95%RH
4~5℃/min, or faster
Assembled Type
-68℃~+85℃
30%~95%RH
1~2℃/min
Steady-state Type
-20℃~+50℃
30%~95%RH
N/A
2. Scheme Design & Confirmation: Balance Professionalism and Practicality
After clarifying requirements, the technical team will issue a customization scheme, which mainly includes three parts:
Structural Design: Based on size and type, plan the layout of the test chamber's door, observation window and sample rack to ensure operational convenience and airtightness.
System Matching: Equip with corresponding refrigeration, heating, humidification and dehumidification systems to ensure temperature and humidity control accuracy, and configure hardware and software according to the control method.
Compliance Verification: The scheme must conform to relevant industry standards (such as GB/T, IEC, etc.), and confirm with the customer whether it needs to meet specific industry testing specifications.
After scheme confirmation, detailed drawings and technical agreements will be generated to clarify the rights, obligations and delivery standards of both parties.
3. Production & Manufacturing: Strictly Control Process and Quality
Entering the production stage, the process will be controlled around the two cores of "accuracy" and "stability":
Core Component Procurement: Select high-reliability compressors, sensors, controllers and other core components to ensure long-term operational stability of the equipment.
Modular Production: Assembled equipment adopts modular manufacturing to reduce on-site installation errors; integral equipment undergoes integrated assembly and preliminary debugging.
Factory Inspection: Each piece of equipment must undergo no-load temperature and humidity calibration and operational stability testing. Only after confirming that the parameters meet the design requirements can shipment be arranged.
4. Installation, Commissioning & Delivery: Ensure On-site Application
After the equipment arrives at the site, the professional team will provide full-process services:
On-site Installation: Carry out equipment positioning, pipeline connection and circuit debugging according to site conditions; for assembled equipment, ensure airtight connection of each module.
Accuracy Calibration: Combine the customer's testing needs, use professional instruments to perform on-site calibration of temperature and humidity uniformity and fluctuation to ensure compliance with test requirements.
Training & Delivery: Provide equipment operation and maintenance training for the operation team, and deliver technical materials such as operation manuals and calibration reports to complete the final acceptance.
Would you like me to supplement an English Version of Walk-in Environmental Test Chamber Customization Requirement Confirmation Form? It will list key parameter check items and common questions to facilitate quick alignment of requirements between you and your customers.
In industrial manufacturing's "quality defense line", walk-in environmental test chambers are low-key yet critical. As "environmental simulation masters", they replicate extreme conditions from polar cold to tropical heat, testing large equipment and batch products. Their hidden technical strengths merit in-depth exploration.
I. Spacious Interior for Flexible Adaptation to Diverse Testing Needs
The "walk-in" design is a core breakthrough. With several to dozens of cubic meters of space, it accommodates large products (automotive parts, electronic devices) and enables batch testing of small/medium items. New energy vehicle battery packs and rail transit systems can be tested integrally without disassembly. Flexible racks and zoning fit various sample shapes, solving traditional equipment's "unfit and unstable" issues.
II. Precise Temperature Control for Highly Simulating Diverse Extreme Environments
Precise temperature control is its core advantage, with a temperature range of -70℃ to 250℃ and humidity of 20%RH to 98%RH, replicating high-altitude, desert and coastal environments. Using PID algorithms and multi-point sensing, temperature/humidity fluctuations are controlled within ±0.5℃ and ±2%RH, ensuring reliable data. It simulates high-altitude conditions for aerospace and verifies consumer electronics' performance in extremes to support product iteration.
III. Energy Conservation and Environmental Protection for Long-term Operating Cost Optimization
To address high energy consumption, it adopts variable frequency compressors and low-power heating modules for intelligent power adjustment. Double-layer vacuum insulation reduces heat exchange, and high-end models feature waste heat recovery. Energy consumption is cut by over 30% vs. traditional equipment, saving tens of thousands in annual electricity costs. Stable operation lowers maintenance needs and extends service life, reducing long-term costs.
IV. Structural Selection and Customization Services
Lab Companion's walk-in chambers have two main structures: integral welded and assembled, with diverse specifications compatible with multiple refrigerants.
Assembled models use independent panels fixed by interlocks and reinforcing bolts, simplifying transportation and installation. Integral welded models offer better performance, with wider temperature/humidity ranges and faster temperature change rates.
In addition, you can choose a suitable model based on your needs. Lab Companion provides customized services if existing specifications are insufficient .
V. Conclusion: The "Core Driving Force" for Industrial Quality Upgrading
With large space, precise control, energy efficiency and durability, these chambers are industrial testing's "quality stewards". Critical for improving product reliability in manufacturing transformation, they will upgrade to more precise and intelligent versions to empower industrial high-quality development.
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