Technical principle and system composition of high and low temperature test chamber
Release time:
2025-07-02
Cascade refrigeration cycle: For temperatures below -40 ℃, two-stage compression or ternary cascade technology is used, combining R404A (medium temperature refrigerant) with R23 (low-temperature refrigerant) to ensure low-temperature stability.
refrigeration system
Cascade refrigeration cycle: For temperatures below -40 ℃, two-stage compression or ternary cascade technology is used, combining R404A (medium temperature refrigerant) with R23 (low-temperature refrigerant) to ensure low-temperature stability.
Cooling rate: 0.7-1.2 ℃/min, temperature fluctuation during no-load operation ≤ ± 0.5 ℃, uniformity ≤ ± 2 ℃.
Heating system
Far infrared nickel alloy high-speed heater: power 2kW × 2, heating rate 1.0-3.0 ℃/min, supports independent high-temperature control, and avoids mutual interference in alternating tests.
control system
Imported microcomputer temperature and humidity integrated controller: using P.I.D+S.S.R system for coordinated control, with an accuracy of ± 0.1 ℃, supporting 120 sets of programs, 12000 step storage, and automatic calculation and correction function.
Human computer interaction: 7-inch high-definition touch screen, supports switching between Chinese and English, real-time curve display, and historical data playback (can store 600 days of data).
Box Structure
Inner liner: SUS304 stainless steel, with strong corrosion resistance; External gallbladder: A3 steel plate spray painted, beautiful and easy to clean.
Insulation layer: 100mm thick ultra-fine glass fiber cotton to reduce energy loss.
Observation window: multi-layer insulated tempered glass with built-in conductive film for clear observation of the test process.
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