Thermal Cycling Chamber – Ramp Rate 20℃/min – 1500 Liters

This week, We have developed 1 piece 1500 liters rapid-rate thermal cycling chamber for our engineering mechanics research institute customer. This thermal cycling chamber equip with a 50 ton water cooling tower system. Different from other Chinese thermal cycling chambers manufacturers, The technician from Wewon Tech has considered the heat load of the test samples. During the sample’s power-on test, the total power of the 5 test samples reached 20 kW. This is undoubtedly a big challenge, But we have finally accomplished the task brilliantly.

In order to ensure the cooling rate and minimum temperature requirements of the Wewon’s thermal cycling chamber, the machine adopts a dual cascade air-cooled refrigeration system composed of Tecumseh hermetic compressors. The cascade refrigeration system consists of a high-temperature refrigeration cycle and a low-temperature refrigeration cycle. The connecting container is an evaporative condenser. The evaporative condenser plays the role of energy transfer. The heat energy in the working room is transferred out through the two-stage refrigeration system to achieve high temperature purpose.

Thermal Cycling Chamber

Model DescriptionESS-WEW- 225LL5|1560 Liters
Test Room(W*D*H)1300*1200*1000mm
External Dimension1930*2950*2250 mm
Insulation MaterialRigid Polyurethane Foam, 100 ~ 150mm
Temp Rate of Change20~22 ℃/min
Performance Test-30℃ ~ +100℃
Exterior MaterialCold-rolled Stell, Thickness 2.0mm
Interior MaterialStainless Steel Type (SUS 304)
Compressor 1Germany Boke Semi-Hermetic Compressor
Compressor 2Germany Boke HGX66e/1750-4
Compressor 3France Tecumseh Hermetically Sealed
Cooling Mode50 Ton Water Tower Cooling
Safety DevicesIron-chrome Wire Heater
Heater PartsOver Current Protection for Compressor
Blower SystemCentrifugal Blower
Sight Window250*400mm, 2 Pieces
Touch ScreenGlass Incorporating Heat Generator
Control SystemPT-100|Rapid-Rate Thermal Cycle Chamber
Temp SensorProgrammable Japan OYO 3000
Ambient Temp+5℃~+35℃, 30%~90%
Power VoltageAC 380V 50Hz 5 wires + Ground Wire

The design and application of refrigeration system and energy regulation technology is an effective treatment method. It can not only ensure that the refrigeration unit operates under normal conditions, but also can effectively adjust the energy consumption and refrigeration capacity of the refrigeration system, so that the operating cost and failure rate of the refrigeration system are reduced to a more economical state. There are many types of enviornmental chambers for environmental simulation test. The thermal cycling chambers and the climatic test chambers are two different equipment for environmental testing.

From the appearance, They are not big but different, and the tests they perform are quite different. The thermal cycle test machine simulates the changes of the external environment through physical cooling and heating methods, and creates extreme environmental temperatures to test the extreme environmental adaptability of the product to ensure stronger weather resistance in subsequent use. The appearance of the rapid-rate thermal cycle chambers are not much different from that of the conventional environmental test chambers, But with its excellent temperature raising and lowering capabilities and higher control technology, It has become one of the first choices of major car companies and research institutes.

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Thermal cycling chamber is the use of TEMPERATURE ACCELERATION METHOD [1] to change the external environmental stress under the design strength limit of the product, so that thermal stress and strain are generated in the product, and the DEFECTS LATENT IN THE PRODUCT [2] emerge through the accelerated stress. In this way, It is possible to avoid the failure of the tested products in the future during use and the test of environmental stress, resulting in unnecessary losses.

TEMPERATURE ACCELERATION METHODRefers to the alternating expansion and contraction of the product when circulating within the upper and lower extreme temperatures.
DEFECTS LATENT IN THE PRODUCTInclude potential part material defects, process defects, process defects, etc.

The temperature cycling chamber has a wide range of uses, and its function is similar to that of the thermal shock test chamber. Different from the thermal shock test machine, the temperature change of the thermal cycling chamber is relatively constant, that is, the temperature change rate is relatively stable or to high temperature. The temperature change of the thermal shock chamber is a situation where it will be cold and hot. The reason is that the thermal shock test machine directly uses the air in the high temperature and low temperature regions to perform the thermal change test.

When the user needs to perform a rapid temperature change test, whether to choose a thermal cycling chamber or a thermal shock chamber, They need to choose according to their own product. Some product testing hopes to detect with stable temperature changes, so it is appropriate to use a thermal cycle chamber. If the temperature change efficiency is extremely high, then it is good to use a thermal shock test equipment.

Test Room of Thermal Cycling Chamber with 20 kW Heating Load Samples

Samples Test Temperature: -25°C +20° CTesting Condition Description
Test Cycle Times: 160 times in total. (DV: 80 times, PV: 80 times)
Test Time: 2400 hours (Total)
Wind Speed: 0-300kg/h|Duty Cycle: 0-100%
Voltage at PTC: 350V, 410 (24 Hours Change)
Test Sample Quantity: Integrated Electronic Components, 5 Pieces
The test sample can work normally during and after the test.Sample Qualification Method
Test the power at the following temperature before and after the test.
Temperature Test Conditions: -20°C, -10°C, 0°C, +-20°C
Air Volume: 480kg/h, 380kg/h, 300kg/h, 120kg/h
Duty Cycle: 100%
Insulation test after test.
After the test, Take one piece sample to check that the controller components are normal.

After the temperature is stabilized, the load is powered on, and the temperature fluctuation range and stabilization time are given when the Didian load is changed, and the temperature fluctuation range and time are given when changing to a different load again)Samples Test Method
20KW samples power on test at -25℃, test for 42 minutes, 10KW samples power on test for 14 minutes, no load test for 10 minutes.
When the temperature is increased to -15°C, the 20KW samples power on test is 45 minutes, the 15KW samples power on test is 42 minutes, the 10kW samples power on test is 28 minutes, and the no-load test is 10 minutes.
When the temperature is raised to -5℃, the 20KW samples power on test is 43 minutes, the 10KW samples power on test is 134 minutes, and the no-load test is 5 minutes.
When the temperature is raised to +0℃, the 15KW samples power on test is 86 minutes, the 10KW samples power on test is 272 minutes, and the no-load test is 5 minutes.
When heating up to +5℃, 10KW samples power on test is 231 minutes, no load test is 5 minutes.
When the temperature is raised to +10℃, the 10KW samples power on test is 31 minutes, the 5KW samples power on test is 188 minutes, and the no-load test is 10 minutes.
When heating up to +20℃, 5KW samples power on test 194 minutes, no load test 45 minutes.
When the temperature is lowered to -25°C, cycle this test process 100 times (1 cycle test takes 24 hours, 100 cycles total 2400 hours)

20 kW Heating Load Samples Test Methods & Graph

Air Temperature Test
% Command-25℃-15℃-5℃+0℃+5℃+10℃+20℃
100%|20 kW42 minutes45 minutes43 minutes
75%|15 kW42 minutes86 minutes
50%|10 kW14 minutes28 minutes134 minutes272 minutes231 minutes31 minutes
25%|5 kW188 minutes194 minutes
0%|0 kW10 minutes10 minutes5 minutes5 minutes5 minutes10 minutes45 minutes

The thermal cycling chamber has a significant effect on improving the yield rate of product shipments and reducing the number of repairs. In addition, The stress screen itself is a process stage, not a reliability test. Therefore, Stress screening is a 100% test test performed on the product.

The thermal cycle chamber from Wewon Tech can set the low temperature, high temperature, test time, and program at one time, and the program runs independently by the device. It is a necessary test equipment in the fields of aviation, automobiles, home appliances, scientific research, etc. The temperature cycling test chamber is used to test and determine the parameters and performance of electrical, electronic and other products and materials after high temperature, low temperature, or constant temperature testing.

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With the development of economy and the progress of society, users’ demand patterns for rapid-rate thermal cycling chambers have also undergone great changes. Taking the electronic and electrical industry as an example, manual sampling and experimental analysis are developing towards automation, intelligence, and networked monitoring. Vigorously develop equipment automation and improve the overall level of equipment manufacturing. The accelerated reliability testing chamber is the key to improving the level of equipment manufacturing.

The characteristics of high technology, high input, high output, low energy consumption, and low pollution of the fast temperature cycling test chamber industry will drive the increase in the demand for instruments and meters under the development of the low-carbon economy and emerging industries. It has always been used in traditional service markets, such as metallurgy, thermal power and other industries.

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With the changes in market demand, more and more new industries have begun to emerge, and new technologies such as the Internet of Things and smart grids are developing rapidly. The safety of food and medicine has attracted much attention. More stringent requirements are put forward for the comprehensive utilization of energy and environmental protection. This also provides a broad market development space and new development direction for China’s thermal cycle chambers.

In recent years, China’s rapid-rate thermal cycle chambers has effectively improved the competitiveness of enterprises through the transformation of product structure, industrial agglomeration and professional reorganization, and the scale of the industry and the total industrial output value have been continuously enlarged. For future, the low-end products of the thermal cycle chamber market will be fiercely competitive, and the prospects for large-scale high value-added products are promising.

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