Microcomputer high and low temperature alternating test chamber

1Microcomputer high and low temperature alternating test chamberTechnical specifications

（1） Box specifications

Inner box dimensions: width 600mm x depth 700mm x height 950mm, with a capacity of 408L, capable of accommodating larger volume test samples or multiple samples for simultaneous testing.

Outer box dimensions: width 1250mm x depth 1150mm x height 1800mm, compact box structure, saving laboratory space.

Material: The inner box is made of SUS304 stainless steel mirror panel, which is corrosion-resistant and easy to clean; The outer box is made of A3 steel plate spray painted, with a smooth and beautiful surface, and has good anti rust and wear-resistant properties.

（2） Temperature performance

Temperature range: -40 ℃ to 150 ℃, covering a wide range of testing temperatures from extreme cold to high temperature.

Temperature fluctuation: ± 0.5 ℃, ensuring temperature stability during testing and reducing the impact of temperature fluctuations on test results.

Temperature uniformity: ± 2 ℃, ensuring that samples at different positions inside the box are in the same temperature environment to improve the consistency of test results.

Heating rate: ≥ 5 ℃/min (no load), rapid heating can effectively shorten the testing cycle and improve testing efficiency.

Cooling rate: ≥ 1 ℃/min (unloaded), meeting the requirements of different tests for cooling rate.

（3） Control performance

Control system: It adopts a programmable touch screen controller, supports multi segment program editing, and can achieve linear or nonlinear temperature alternating control. Users can flexibly set temperature change curves according to testing needs.

Communication interface: Equipped with RS-232 and RS-485 communication interfaces, it can be connected to a computer to achieve remote monitoring, data collection and analysis, making it convenient for users to manage experiments and process data.

IIMicrocomputer high and low temperature alternating test chamberKey system configuration

（1） Refrigeration system

Compressor: French Taikang fully enclosed compressor is selected, with high refrigeration efficiency and stable performance. The two-stage cascade refrigeration system design ensures efficient refrigeration even in low-temperature environments.

Condenser: Adopting air-cooled condenser with good heat dissipation effect, no need for external cooling water, easy installation and maintenance; Equipped with an efficient cooling fan that automatically adjusts the speed according to the operating status of the compressor, reducing energy consumption.

Evaporator: finned evaporator, increasing heat transfer area and improving refrigeration efficiency; The surface of the evaporator has undergone special treatment, which enhances its corrosion resistance and prolongs its service life.

（2） Heating system

Heating element: Using nickel chromium alloy electric heating wire, it has the characteristics of fast heating speed, high thermal efficiency, and long service life.

Temperature control system: Combined with intelligent PID temperature control algorithm, it accurately controls the heating power, achieves rapid temperature rise and stable temperature control, and avoids temperature overshoot.

（3） Circular system

Fan: Low noise centrifugal fan is used, with strong wind power, ensuring uniform circulation of air inside the box and improving temperature uniformity.

Air duct design: Optimize the air duct structure, adopt a circulation mode of upper air outlet and lower return air, so that the air inside the box forms a reasonable airflow organization, ensuring uniform temperature distribution.

4、 Security protection measures

Overtemperature protection: Set up an independent overtemperature protection device. When the temperature inside the box exceeds the set safe temperature, the heating power will be automatically cut off and an audible and visual alarm signal will be issued.

Leakage protection: Equipped with a leakage circuit breaker to monitor the leakage situation of the circuit in real time. Once leakage is detected, the power supply is immediately cut off to ensure the safety of operators.

Compressor protection: It has functions such as compressor overload protection, high pressure protection, low pressure protection, etc., to prevent compressor damage due to abnormal working conditions and extend the service life of the compressor.

Water shortage protection: (if equipped with humidification function) When the water level in the water tank is too low, the humidification will automatically stop and an alarm will be issued to avoid damage to the humidification system due to water shortage.

Sound and light alarm: The test chamber is equipped with sound and light alarm devices, which can promptly issue alarms in case of abnormal situations such as overheating, leakage, and faults, reminding operators to handle them.