1. Preparation for Load-bearing and Dimensional Adaptation
• The load-bearing capacity of the site floor shall strictly meet the core requirement of ≥500kg/m², which is a key prerequisite for ensuring the long-term stable operation of the equipment and avoiding equipment deformation or safety hazards caused by insufficient load-bearing capacity.
• It is necessary to accurately confirm the external dimensions of the test chamber specified in the technical specification in advance. Combined with the on-site actual survey of the transportation and installation path, ensure that the equipment can smoothly pass through all key passage nodes such as elevators, laboratory doors and corridors, so as to avoid delay in delivery and installation due to inconsistent dimensions.
2. Preparation for Installation Site Conditions
• The floor of the installation site shall be flat without protrusions and depressions, and the ventilation conditions shall meet the basic standards for equipment operation. At the same time, there shall be no flammable, explosive, corrosive gases or dust in the environment, as such substances will seriously affect the service life of equipment components and the accuracy of test data.
• Strong electromagnetic radiation sources such as high-voltage lines and large motors should be actively avoided near the equipment installation location, as strong electromagnetic interference may cause disorder of the equipment control system, thereby affecting the temperature and humidity control accuracy of the test chamber.
• A floor drain that meets the drainage standards must be provided within 2 meters of the equipment's refrigeration unit. This requirement is to timely discharge the condensed water generated during the operation of the refrigeration system, so as to avoid water accumulation soaking the equipment or polluting the site environment.
• Sufficient maintenance and operation space shall be reserved around the equipment in accordance with specifications. The specific requirements strictly follow the following standards: Area A ≥80cm, Area B ≥60cm, Area C ≥110cm, Area D ≥110cm. Sufficient space is a necessary guarantee for later equipment maintenance, calibration and component replacement.
Widely used in electronics, automotive, aerospace, etc. It tests product reliability by simulating extreme environments and is key equipment for product quality and safety.
1. Refrigeration system safety protection
Compressor overpressure protection: Activates pressure relief when overpressure, preventing explosion and ensuring safety.
Compressor overheating protection: Monitors temperature in real time, cuts power when exceeding threshold to avoid burnout and extend life.
Compressor over-current protection: Monitors current, cuts power when exceeding rated value to prevent overload or motor damage.
2. Test area safety protection
Adjustable over-temperature protection: Flexible threshold setting, automatically controls temperature (reduces power, starts cooling) when exceeding, protecting samples and equipment.
First-layer high/low temperature over-temperature protection: Sets high/low temperature protection values for operating temperature, stops heating/cooling when exceeding range.
Second-layer high-temperature over-temperature protection: Electronic device with high-precision detection, cuts heating power when exceeding first-layer range.
Third-layer high-temperature over-temperature protection: Last barrier, cuts all heating power and alarms when first two layers fail.
Fault protection: Cuts control power when faulty, indicates cause and outputs alarm for easy troubleshooting.
3. Other safety protections
Total power phase sequence and open-phase protection: Monitors phase sequence and open-phase, cuts power when abnormal to prevent damage.
Short-circuit protection: Quickly cuts circuit (fuse blowing, breaker tripping) during short circuit to avoid fire, etc.
Leakage/surge protection: ELB prevents electric shock, fuse protects circuit, RC device suppresses surges.
Water-cut and dry-burning protection: Cuts power for humidity-related equipment and electric heating when water is cut off to prevent dry burning.
4. Summary
The safety protection system of the high-low temperature and humidity test chamber covers core working units and key auxiliary links, forming a comprehensive and multi-level protection closed loop. Through accurate monitoring, rapid response and effective intervention, each protection device not only ensures the long-term stable operation of the equipment and extends its service life, but also safeguards the safety of test samples and personnel operation. It serves as the core support for reliable test processes and accurate results, building a solid safety barrier for product quality verification.
In environmental reliability testing, high-low temperature humidity test chambers and constant temperature and humidity test chambers are easily confused due to similar names, but they differ significantly in testing capabilities, applications and technical characteristics. Accurate distinction and selection are key to ensuring valid test data. This blog will analyze the core differences and provide selection suggestions.
I. Core Definition: Essential Distinction of Functional Boundaries
The core difference between the two starts with functional positioning, which directly determines the applicable scenarios.
The core of the constant temperature and humidity test chamber is "maintaining stability". It can accurately control and maintain the set temperature and humidity for a long time, and is used to simulate the long-term performance of products in specific environments, such as electronic component stability testing and textile temperature-humidity sensitivity testing. Its core requirement is "steady-state environmental performance verification".
The high-low temperature humidity test chamber focuses on "dynamic simulation". In addition to precise temperature and humidity control, it has a wide-range fluctuation capability, which can simulate environments such as high-low temperature cycles and alternating humidity and heat, such as extreme temperature differences during product transportation and diurnal temperature-humidity changes of outdoor equipment. Its core requirement is "dynamic environmental reliability verification".
II. Key Differences: Multi-dimensional Analysis from Technology to Application
1. Temperature and Humidity Range and Fluctuation Capacity
The constant temperature and humidity chamber has a mild temperature and humidity range (temperature 0℃-100℃, humidity 30%-95%RH) and high control precision (temperature fluctuation ±0.5℃, humidity ±2%RH), but no extreme temperature-humidity impact capability.
The high-low temperature humidity chamber has a wider temperature and humidity coverage (temperature -70℃~200℃, humidity 10%-98%RH) and rapid change capability (heating rate 3℃/min-15℃/min, cooling rate 1℃/min-10℃/min), which can realize rapid cycle switching between "high temperature and high humidity - low temperature and low humidity"—a feature unavailable in the former.
2. Differences in Core Technical Architecture
The constant temperature and humidity chamber adopts single-stage compression refrigeration, conventional resistance heating, and steam or ultrasonic humidification. Its system design focuses on "energy saving and stability", with simple structure and low operating cost.
To meet extreme needs, the high-low temperature humidity chamber uses cascade refrigeration, rapid-heating tubes, and its humidity system includes a fast-response dehumidification module, with a thicker insulation layer on the chamber wall. Its technical complexity and manufacturing cost are much higher than the former.
3. Applicable Scenarios and Testing Purposes
The constant temperature and humidity chamber is used for steady-state environmental adaptability testing, such as electronic component aging and pharmaceutical storage simulation, to verify the performance consistency and durability of products in a fixed environment.
The high-low temperature humidity chamber focuses on dynamic reliability testing, such as high-low temperature cycling of auto parts and extreme environment simulation of aerospace products, to expose product defects (material aging, structural deformation, etc.) under drastic environmental changes.
In summary, the constant temperature and humidity chamber guards the steady-state environment, while the high-low temperature humidity chamber challenges the dynamic environment. There is no absolute advantage or disadvantage between the two. Only by matching needs, clarifying scenarios and budgets can the test truly guarantee product quality.
OVEN is engineered to deliver high-precision temperature and pressure environments, catering to demanding applications in R&D and manufacturing. It serves a wide range of industries, including electronics, semiconductors, aerospace, and automotive. Its primary features are as follow:
1. User-Friendly Operation: Equipped with a large-inch photo-level true-color ultra-large touchscreen interface, the panel is provided with operation, over-temperature setting, shift/monitoring, and shutdown/reset buttons, enabling intuitive and easy operation. It comes with a standard USB interface for downloading curves and data. Operators can program after simple training, and can also independently input information such as the user unit and department, making the machine status clear at a glance.
2. Safety Protection: It has six major protection functions: overcurrent protection, overvoltage protection, undervoltage protection, overload protection, power module protection, and over-temperature protection. When the equipment malfunctions, it will alarm and display solutions, and activate self-protection. For low-level alarms, only personnel with specific permissions can unlock with a password to continue operation, ensuring high safety.
3. Accurate and Stable Core Performance of Temperature and Pressure
① Temperature Control: The range covers RT+10～300℃ (long-term safe use ≤260℃), with a temperature adjustment accuracy of ±0.5℃ in a vacuum environment and ±1℃ in an atmospheric environment.
② Vacuum Pressure Performance: The minimum vacuum degree can reach -99.9 kpa, which is accurately monitored by a semiconductor pressure sensor. PID control is also adopted to realize dynamic pressure adjustment.
③ Environmental Adaptability and Uniformity: Calibrated based on the conditions of 23℃ ambient temperature, rated voltage, and no test samples, it is suitable for laboratory and industrial scenarios. Some models are equipped with horizontal cross-flow air supply and three-sided circulation air ducts to ensure the temperature uniformity of the working chamber.
Lab Companion ovens come in a comprehensive selection of sizes, types, and performance specs. Backed by free in-warranty service for non-human errors and transparent post-warranty support, we ensure lifelong operational security.
Environmental test chambers simulate complex conditions such as high/low temperatures and humidity, widely serving industries including electronics, automotive, aerospace, materials, and medical devices. Their core function is to verify the tolerance of products and materials, enabling early defect detection, ensuring product reliability, facilitating industry compliance, and reducing after-sales costs. They are critical equipment for R&D and quality control.
Founded in 2005, Lab Companion specializes in the R&D and manufacturing of environmental simulation equipment. Since its establishment, the company has deeply cultivated core technologies and obtained multiple patent certifications, demonstrating strong technical capabilities in this field. Our cooperative clients cover numerous industries such as aviation, aerospace, ordnance, marine engineering, nuclear power, communications, automotive, rail transit, electronics, semiconductors, and new energy.
Lab Companion offers a comprehensive product portfolio, including high-low temperature alternating humidity test chambers, rapid temperature change test chambers, thermal shock test chambers, walk-in environmental test chambers, high-low temperature low-pressure test chambers, temperature-humidity-vibration combined test chambers, and customized non-standard environmental test equipment. Each product line provides multiple options for models, sizes, and temperature-humidity parameters to accurately meet diverse application needs.
In addition, we deliver premium pre-sales and after-sales services, offering full-cycle support from product selection to after-sales guarantee to ensure your peace of mind. Should you have any cooperation intentions or related inquiries, please feel free to contact us at any time!
Испытательная камера для высоко- и низкотемпературных ударов предназначена для испытаний на надёжность промышленных изделий при высоких и низких температурах. Она используется для оценки характеристик компонентов и материалов в таких отраслях, как электроника, автомобилестроение, аэрокосмическая промышленность, судостроение и производство вооружений, а также в высших учебных заведениях и научно-исследовательских учреждениях, в условиях чередующихся циклов высоких и низких температур. Основные характеристики включают:Отличная проводимость: сплавной кабель, изготовленный с добавлением редкоземельных элементов, меди, железа, кремния и других китайских элементов, проходит специальную обработку для достижения проводимости на 62% выше, чем у меди. После этой обработки площадь поперечного сечения сплавного проводника увеличивается в 1,28–1,5 раза, что делает токонесущую способность и падение напряжения кабеля сопоставимыми с медными кабелями, фактически заменяя медь новыми сплавами.Превосходные механические свойства: по сравнению с медными кабелями, отскок при ударных испытаниях при высоких и низких температурах на 40% ниже, а гибкость на 25% выше. Кроме того, кабель обладает превосходной изгибающей способностью, что позволяет использовать значительно меньший радиус прокладки по сравнению с медными кабелями, что упрощает монтаж и подключение клемм. Специальная формула и процесс термообработки значительно снижают ползучесть проводника под воздействием тепла и давления, обеспечивая такую же прочность электрических соединений, как и у медных кабелей.Надежные показатели безопасности: Испытательная камера для испытаний на удар при высоких и низких температурах прошла строгую сертификацию UL в США и уже 40 лет без проблем используется в таких странах, как США, Канада и Мексика. Созданная на основе передовых американских технологий, испытательная камера прошла испытания и проверки в различных национальных организациях, что гарантирует её высокую безопасность.Экономия средств: При достижении тех же электрических характеристик прямые затраты на закупку камер для испытаний на удар при высоких и низких температурах на 20–30% ниже, чем на закупку медных кабелей. Поскольку кабели из сплавов весят вдвое меньше медных и обладают превосходными механическими свойствами, их использование позволяет снизить расходы на транспортировку и монтаж более чем на 20% в зданиях общего назначения и более чем на 40% в зданиях с большими пролетами. Использование камер для испытаний на удар при высоких и низких температурах окажет неоценимое влияние на построение ресурсоэффективного общества.Отличные антикоррозионные свойства: при контакте с воздухом при высоких температурах кабели из сплава мгновенно образуют плотный оксидный слой, обладающий высокой устойчивостью к различным видам коррозии, что делает их пригодными для использования в суровых условиях. Кроме того, оптимизированная внутренняя структура проводника из сплава и использование изоляционного материала из силан-сшитого полиэтилена продлевают срок службы кабелей из сплава более чем на 10 лет по сравнению с медными кабелями.
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