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E-mail
shjuyigs@163.com
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15021203562
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Tingfeng Road, Zhujing Town, Jinshan District, Shanghai
Shanghai Juyi Environmental Testing Equipment Co., Ltd
Briefly describe the functional characteristics of each component of the programmable constant temperature and humidity test chamber
Date: 2025-09-15Read: 0
In the research and development of electronic products, automotive components, new materials, and drug stability testing, programmable constant temperature and humidity test chambers accurately simulate complex environmental conditions such as high temperature, low temperature, high humidity, and low humidity to verify the reliability and durability of products under long-term climate stress. The stable operation of the programmable constant temperature and humidity test chamber relies on the collaborative cooperation of multiple precision systems, with each component designed with ingenuity.
1. Studio (Inner Container)
SUS304 stainless steel plate is welded and formed, with a mirror polished surface that is corrosion-resistant, easy to clean, and prevents the release of pollutants from affecting test results. The inner wall ensures even distribution of insulation and humidity. Some models are equipped with anti condensation heating layers to prevent water vapor from condensing on the wall and interfering with the sample.
2. Refrigeration system
Composed of a fully enclosed compressor, air-cooled condenser, evaporator, and throttling device (capillary tube or electronic expansion valve). Using environmentally friendly refrigerants (such as R404A/R23) to achieve wide temperature range regulation from -70 ℃ to+150 ℃. Double stage compression or multi-stage stacking technology is used for ultra-low temperature models to ensure rapid cooling and temperature stability (± 0.5 ℃).
3. Heating system
Nickel chromium alloy electric heating wires are evenly distributed in the air duct, and combined with PID control algorithm, achieve stepless power adjustment heating. The heating process is smooth and controllable to avoid local overheating and damage to the sample. The heating element is isolated from the airflow to prevent dust from adhering and causing fires.
4. Humidification and dehumidification system
Humidification: Using steam generation or ultrasonic atomization technology, clean water vapor is generated through a humidification tank to quickly increase the humidity inside the box (up to 98% RH).
Dehumidification: Relying on the refrigeration system for condensation dehumidification, when the surface temperature of the evaporator is below the dew point, moisture in the air condenses and is discharged. Some models are equipped with rotary dehumidification modules to achieve precise control in low humidity environments (≤ 10% RH).
5. Air circulation system
The centrifugal fan forces air through the heater, evaporator, and humidifier, and then forms a stable air field through the guide plate to ensure small temperature and humidity deviations in each corner of the working room (usually ≤± 1 ℃, ± 2% RH). The wind speed can be adjusted to meet the needs of different heat dissipation samples.
6. Control system
Equipped with a 7-inch touch screen controller, it supports programmable settings (multiple temperature, humidity, and time settings) and can achieve hundreds of cycles. Built in RS485/Ethernet interface, supports remote monitoring and data export. It has multiple modes such as fixed value operation, program operation, and scheduled startup, meeting the testing requirements of GB/T, IEC, MIL and other standards.