The temperature range of the two box cold and hot shock test chamber depends on the equipment configuration (refrigeration system, heating power) and the type of refrigerant used. The temperature range of conventional industrial/laboratory models is -70 ℃~+150 ℃, and some customized models can be extended to -85 ℃~+200 ℃. The specific settings are independent of "low temperature chamber" and "high temperature chamber". The following is a detailed explanation:
1、 Temperature range of conventional models (very commonly used, covering over 80% of application scenarios)
1. Low temperature chamber (the "cold zone" for impact testing)
Conventional very low temperature: -70 ℃ (mainstream configuration, using R404A+R23 two-stage refrigeration system to meet the impact testing needs of industries such as electronics, automotive, plastics, etc.);
Common range: -70 ℃~+20 ℃ (some models can achieve constant temperature in a low-temperature chamber, used for low-temperature pretreatment before impact).
2. High temperature chamber (the "hot zone" for impact testing)
Conventional maximum temperature:+150 ℃ (using stainless steel heating tube+hot air circulation, heating power usually 3-6kW, quickly heating up to the set temperature);
Common range:+60 ℃~+150 ℃ (after the high temperature chamber reaches the target temperature quickly, the sample is transferred to the low temperature chamber by a basket to achieve thermal shock).
2、 Expand the temperature range of the model (customized for special scenarios)
1. Customized models for deep and low temperatures
The low-temperature box has a very low temperature of -85 ℃ (using an R14+R23 stacked refrigeration system, combined with high-efficiency insulation materials, suitable for aerospace, military electronics and other scenarios with strict low-temperature requirements);
The temperature range of the high-temperature chamber remains unchanged (still+60 ℃~+150 ℃), and the impact temperature difference can reach 240 ℃ (-85 ℃ →+150 ℃).
2. High temperature expansion models
Maximum temperature of the high-temperature box:+200 ℃ (upgraded heating power to 6-10kW, using high-temperature resistant circulating fans and seals);
Applicable scenarios: Hot and cold shock testing of high-temperature resins and special metal materials, which require rapid switching to low-temperature environments after withstanding high temperatures.
3、 Key Supplementary Explanation
Impact temperature difference and temperature recovery time:
Typical impact temperature difference for conventional models: 120 ℃ (-40 ℃ →+80 ℃), 150 ℃ (-55 ℃ →+95 ℃), basket transfer time ≤ 10 seconds (to ensure impact effect);
Temperature recovery time: It takes 15-30 minutes for the high-temperature chamber to rise from room temperature to 150 ℃, and 30-60 minutes for the low-temperature chamber to drop from room temperature to -70 ℃ (slightly different models).
Temperature uniformity and fluctuation:
Uniformity: ± 2 ℃ (temperature deviation at each point inside the high temperature box/low temperature box);
Volatility: ± 0.5 ℃ (temperature fluctuation range after stabilization), ensuring that all parts of the sample withstand consistent temperature shock.
Industry standard reference:
Compliant with standards such as GB/T2423.10 and IEC60068-2-14, the recommended temperature range for routine testing is -55 ℃~+125 ℃ (covering the reliability testing requirements of the vast majority of civilian and industrial products).
summary
Conventional selection: Priority should be given to models with a temperature range of -70 ℃ to+150 ℃ to meet the routine testing requirements of industries such as electronics, automotive, and home appliances;
Special requirements: Select -85 ℃~+150 ℃ deep low-temperature models for aerospace and military fields, and -70 ℃~+200 ℃ high-temperature expansion models for special material testing;
Procurement suggestion: Based on the actual temperature range of the sample's usage environment, choose a temperature range that is slightly wider than the actual demand to avoid equipment limitations when expanding testing scenarios in the future.