The temperature shock test chamber from Wewon Environmental Chambers Co., Ltd. will comply with the test standard such as MIL-STD-810 Temp Testing Methods 501.7, 502.7, 503.7, IEC 60068-2-14, EIAJ ED-2531B, MIL-STD-833H method 1010.8, JASO D014-4, MIL-STD-202G method 107G. According to the customer’s requirement, Wewon Tech has developed a 27 liters temperature shock test chamber for a customer for electronic chip IC and semiconductor ceramics parts test.
The temperature shock test chambers are suitable for electronic and electronic components, automation components, communication components, auto parts, metals, plastics and other industries, defense industry, aerospace, ordnance industry, electronic chip IC, semiconductor ceramics and polymer materials for physical changes.
Wewon’s temperature shock test chambers can test the repeated resistance of new materials or samples to high and low temperatures, and the chemical changes or physical damage of the product due to thermal expansion and contraction. In this case, It is an ideal testing tool for precision IC and semiconductor parts which according to MIL-STD-810 shock test. Meanwhile, If you have some test procedure about MIL-STD-833H thermal shock test, Please inquiry to us ! Thank you.
| Equipment Model | WE-TST-027-C | WE-TST-050-C | WE-TST-100-C |
| Test Volume | 27 Liters | 50 Liters | 100 Liters |
| Test Room | 300*300*300 mm | 350*400*350 mm | 500*450*450 mm |
| External Dimension | 1250*1700*1250 | 1250*1850*1300 | 1380*1980*1370 |
| Upper Limit of Preheating Temp | +180°C (Non-standard can be customized to 200°C) | ||
| Temperature Rise Time | RT ~ 200℃ takes about 40min | ||
| Lower Limit of Preheating Temp | Type A:-10℃~55℃｜Type B:-10℃~-65℃｜Type C:-10℃~-80℃ | ||
| Temperature Drop Time | RT ~ -70℃ takes about 85min | ||
| High Temperature Impact | 60℃ ~ +150℃ (Non-standard can be customized to 180℃, 200℃) | ||
| Low Temperature Impact | Type A:-10℃ ~ -40℃｜Type B:-10℃ ~ -55℃｜Type C:-10℃ ~ -65℃ | ||
| Temperature Control Accuracy | ≤±0.5℃｜Distribution Accuracy≤±2.0℃ | ||
| Temp Recovery Time | ≤5min｜ Conversion Time≤10sec | ||
| Throttle Switching Time | Within 3 Seconds | ||
| Internal & External Materials | The whole machine is SUS 304# stainless steel plate matte treatment, the inner box is stainless steel | ||
| Insulation Materials | Non-hazardous waste environmentally friendly glass fiber insulation layer | ||
| Controller System | P.I.D + S.S.R+Microcomputer balance temperature control system | ||
| Controller Brand | Korea TEMI South Korea “TEMI” or Japan “OYO” Brand Japan “OYO” Brand Optional | ||
| Refrigeration Compressor | France Tecumseh Brand｜Germany Bizter/BOKE Compressor | ||
| Cooling System | Semi-enclosed two-stage compressor (water-cooled) / fully enclosed two-stage compressor (air-cooled) | ||
| Safety Protection Device | Non-fuse switch, compressor high and low pressure protection switch, refrigerant high pressure protection switch, fault warning system, electronic alarm | ||
| Accessories Parts | Viewing window (special optional type), two upper and lower adjustable compartments, energized measuring line hole, casters, horizontal bracket | ||
| Power Supply | AC380V 50HZ/60Hz 3∮ | ||
| Gross Weight | 325 KG | 455 KG | 680 KG |
Refrigeration System for Wewon’s Temperature Shock Test Chambers: The refrigeration system adopts the optimized design combination of French Tecumseh semi-hermetic compressor, with lower noise, superior performance, and stable and reliable. The controller will automatically adjust the demand for the cooling circuit to ensure the normal suction and discharge temperature of the compressor and improve the life of the compressor.
The refrigeration system adopts a new refrigerant demand algorithm, which can reasonably and effectively use the refrigeration capacity, effectively reduce the mutual consumption of cold and heat, so as to achieve control stability and energy saving. Machine has automatic defrosting technology, which shortens defrosting time and greatly increases the use efficiency.
Working Principle of 2 Zones Thermal Shock Chamber: The 2 zones thermal shock chamber generates a high temperature environment (+60℃ ~ +200℃) and a low temperature environment (-10℃ ~ -80℃) through the heating system and cooling system of the unit. According to the relevant requirements of the temperature shock test, put the tested product into the loading room of the designated greenhouse, and when the two greenhouses reach the preset temperature and are stable, the loading room is pulled through the transmission mechanism to realize the tested component in the basket in the high and low greenhouse between the movement.
During the movement, the high and low temp room are connected, and the component under test also enters another temp test room from a high or low temperature state, so there will be a large amount of cold and heat load, and the unit must quickly restore to the predetermined temperature of each temp room through the refrigeration system or heating system.
When the temperature of the temp test room where the component under test is located remains stable for a long time, the load basket is reversed through the transmission mechanism. Bring the tested component back to the original temp room, and it must also be quickly restored to the predetermined temperature. When the temperature is stable again for a long time, repeat the above operation again to complete multiple temperature cycle shock tests.
Working Principle of 3 Zones Thermal Shock Chamber: The 3 zones thermal shock chamber has built-in three parts: pre-cooling zone, pre-heating zone, and test zone. The three zones are independent, and the three cabinets are switched through the air door. There is no need to move the test product during test procedure. When the impact is at room temperature, the ambient temperature is introduced into the test space through a blower to remove the heat or cold in the test space, and the high and low temperature tank dampers are closed at the same time.
When the low temperature is impacted, the air doors of the high temperature and normal temperature tanks are closed, and the low temperature room is connected to the test room, and the pre-stored cold is instantly introduced into the test room; When the high temperature is impacted, the air doors of the low and normal temperature room are closed, and the high temperature room is connected to the test room, and the pre-stored heat is instantly introduced into the test room. So as to achieve the purpose of rapid temperature change.
Low-temperature storage room in pre-cooling zone: The temperature state in the 3 zones temperature shock test chamber is determined by the operating state of the heater, evaporator and fan in the air duct. After the refrigerant throttling out of the expansion valve enters the evaporator in the operation room, it absorbs the heat in the operation room and vaporizes, so that the temperature in the operation room is lowered.
The vaporized refrigerant is sucked by the compressor and compressed into a high-temperature, high-pressure gas that enters the condenser and is condensed into a liquid. After the screening program, and finally throttling through the expansion valve, It re-enters the evaporator in the operation room to absorb heat and vaporize, and then is sucked and compressed by the compressor. The thermal shock chamber operates repeatedly like this way, so that the temperature of the operating room drops to the set temperature requirement
● The high temperature room is equipped with air conditioning room, circulating air duct, heating device and circulating fan. Install air deflector, damper and diffuser in the air duct, The high-temperature gas is blown out from the air duct and passes through the recovery cycle of the test area.
● The low temperature room is equipped with air conditioning room, circulating air duct, heating device, refrigeration device, cold storage fin and circulating fan. Air deflectors, dampers and diffusers are installed in the air duct, and low-temperature gas is blown out from the air duct and recovered through the test area.
● According to the temperature of the high temperature room, low temperature room and the test temperature, the temperature controller sends instructions by the temperature sensor in the test room. Through the calculus time and SSR control module to control the output of the heater and the work of the refrigeration unit;
● The initial temperature of the sample can be selected from high temperature start or low temperature start according to the test requirements, The temperature of the test zone, the high and low temperature impact conditions and the high and low temperature zone constitute a closed-loop control mode, so as to achieve the purpose of rapid temperature change and high and low temperature constant temperature.
| ● | The thermal cycle chamber’s condenser of the refrigeration system needs to be maintained regularly and kept tidy. When opening or closing the door and taking the test sample from the test room, do not allow the test sample to contact the rubber edge on the door to prevent the rubber edge from being damaged and shortening the service life; | Maintenance Notice |
| ● | The setting value of the over-temperature protector in the electronics area cannot be changed at will, and the machine has been adjusted before leaving the factory; When the test area needs to be taken out after the sample test time is up, it must be turned off and the operator must wear protective gloves. | |
| ● | The ground around and at the bottom of the machine should be kept clean at all times to prevent dust from being sucked into the unit to cause accidents and reduce performance; The sundries in the damper shock test chamber should be cleaned up before operation to avoid interference with the experiment. | |
| ● | The exterior of the cabinet must be cleaned more than once a year, and wipe it with soapy water when cleaning; The power distribution area is cleaned at least once a year, and it is enough to use a vacuum cleaner to suck indoor dust. | |
| ● | The air to air thermal shock chamber has safety protection functions, such as: power supply overload protection, leakage protection, control circuit overload, short circuit protection, compressor protection, grounding protection, over temperature protection, alarm sound prompts, etc |