The high and low temperature test chamber meets the testing standards for automotive sensors

1The high and low temperature test chamber meets the testing standards for automotive sensorsInternal structure design of the box

The internal structure of the high and low temperature test chamber is designed around three core requirements: temperature and humidity uniformity, sealing, and durability. It mainly includes the following modules:

1. Inner liner material and structure

Material selection: The inner liner is made of 304 stainless steel, and some models use 316 stainless steel, suitable for testing conditions containing corrosive gases.

Structural design: The inner liner is a one-piece welded structure, with rounded corners to avoid dust accumulation and residual condensation water; A high-density polyurethane foam insulation layer is filled between the inner liner and the outer shell, combined with insulation cotton on the inner layer, effectively blocking heat transfer inside and outside the box and reducing energy consumption.

2. Air duct circulation system

The air duct system is the key to ensuring temperature and humidity uniformity, and adopts a forced convection circulation design with top supply air and bottom return air:

Circulating fan: Adopting a centrifugal fan equipped with a variable frequency speed regulating motor, the wind speed can be adjusted according to the test conditions to avoid damage to the sample caused by excessive wind speed.

Air duct structure: The top of the box is equipped with a uniform flow hood, which evenly guides the heated/cooled/humidified air into the box; There is a return air outlet at the bottom of the box, and a filter screen is installed at the return air outlet to prevent dust from entering the air duct system; The inner wall of the air duct is smooth, reducing airflow resistance and ensuring the circulation of air inside the box.

3. Layout of heating and cooling core components

Heater: Adopting stainless steel finned electric heater, installed in the air duct to avoid direct contact with the sample; The heater has overheat protection function, which automatically shuts off when the temperature exceeds the safety threshold, ensuring equipment safety.

Refrigeration system: using air-cooled or water-cooled condensing units, the evaporator is installed in the air duct and coordinated with the heater and humidifier for regulation; The refrigeration system adopts two-stage compression technology (suitable for high and low temperature integrated machines), which can achieve wide temperature range control from -70 ℃ to 150 ℃.

4. Sealing and protection design

Door sealing: the box door adopts a double-layer sealing structure, and the door frame is inlaid with silicone rubber sealing strips (high and low temperature resistance, anti-aging) to ensure that there is no air leakage gap after the box door is closed; The door is equipped with an observation window (double-layer vacuum tempered glass), which facilitates the observation of the sample status and reduces heat loss.

Drainage structure: The bottom of the box is designed with an inclined water channel, with a slope of ≥ 3 °, to ensure that condensed water flows quickly to the water collection tray; The drainage pipe adopts an anti siphon design to prevent external air from flowing back into the box and affecting temperature and humidity stability.

Sample rack: equipped with adjustable height stainless steel sample rack, with a load-bearing capacity of ≥ 50kg/layer, to meet the testing needs of samples of different sizes; There is sufficient clearance between the sample rack and the inner container to ensure smooth airflow circulation.

IIThe high and low temperature test chamber meets the testing standards for automotive sensorsMain technical indicators

Model: ADX-TH-500B

1. Inner box size: 1000mm (W) × 1000mm (H) × 500mm (D)

2. Outer box size: 1250mm (W) × 1980mm (H) × 1500mm (D)

3. Temperature range: -40 ∽ 100 ℃;

4. Humidity range: 20% to 98% RH (see temperature and humidity range diagram for details)

5. Temperature fluctuation: ≤± 0.5 ℃

6. Temperature uniformity: ≤± 2 ℃

7. Humidity uniformity: ± 2% RH (when humidity>75% RH); ± 3% RH (when humidity is ≤ 75% RH);

8. Heating time: within 40 minutes at 20 ℃∽+100 ℃; (Under no-load conditions)

9. Cooling time: within 60 minutes from 20 ℃ to -40 ℃; (Under no-load conditions)

10. This device cannot be used to test or store items containing flammable, explosive, or volatile or corrosive gases

Note: The above indicators were measured at room temperature of+25 ℃ without a sample