Manufacturer of high and low temperature alternating test chamber

Manufacturer's use of high and low temperature alternating humidity test chamber:

Suitable for testing the performance indicators of electrical, electronic, aerospace, automotive components, and various electronic components in high temperature, low temperature, or alternating humid and hot environments.

1、 Core technology system

1. Refrigeration system

Working mode: Mechanical compression refrigeration.

Refrigeration cycle:

Single stage compression refrigeration: suitable for standard temperature range (such as -20 ℃~+150 ℃).

Cascade compression refrigeration: used to expand the low-temperature range (such as -40 ℃, -70 ℃). Adopting two independent refrigeration cycles (high temperature stage and low temperature stage), coupled through a cascade heat exchanger, to achieve efficient low-temperature refrigeration.

Core components:

Compressor: Adopt semi enclosed or fully enclosed compressor. For medium and large enclosures, multiple compressors are connected in parallel and equipped with an energy regulation system to improve energy efficiency and reliability.

Condenser: air-cooled or water-cooled. Air cooling is suitable for small and medium power and water shortage situations; Water cooling efficiency is higher, suitable for situations with high power and large thermal loads.

Evaporator: Adopting a finned heat exchanger, it is highly efficient and energy-saving.

Throttle device: capillary tube or thermal expansion valve.

2. Heating system

Method: Heating with nickel chromium alloy resistance wire.

Arrangement: The heater is installed inside the air circulation duct.

Control: Solid state relays are used for PID contactless control, with fast response and long lifespan.

3. Air circulation system

Composition: Composed of a centrifugal fan, a driving motor, and an air duct.

Function: Force air flow inside the box to ensure that the airflow passing through the evaporator and heater can evenly exchange heat with the air inside the working room, ensuring temperature uniformity.

4. Control system

Controller: dedicated programmable temperature controller or industrial touch screen+PLC combination.

Control algorithm: PID control, with self-tuning function. Advanced models support fuzzy PID or predictive control algorithms to optimize control performance during alternating processes.

Programming function: Supports multi-stage programming and can set complex temperature change curves, including heating, cooling, constant temperature, and cycle times.

Communication interface: Standard Ethernet, USB, or RS-232/485 interface for data recording, program upload/download, and remote monitoring.

5. Sensors

Temperature: Pt100 platinum resistance, accuracy.

2、 Main technical parameters

1. Temperature parameters

Temperature range: For example, -70 ℃~+150 ℃ (depending on the refrigeration configuration).

Temperature fluctuation: ≤± 0.5 ℃ (in a stable state).

Temperature uniformity: ≤ 2.0 ℃ (in a stable state).

Heating and cooling rate:

Average speed: 1 ℃~3 ℃/min (average value throughout the process, higher speed can be customized).

Nonlinear rate of change: The device executes temperature changes according to program settings, and the rate is not constant.

2. Structural parameters

Inner box material: SUS304 stainless steel.

Outer box material: cold-rolled steel plate sprayed or SUS304 stainless steel.

Insulation material: high-density glass fiber cotton or polyurethane foam.

Observation window: multi-layer hollow electric heating anti fog glass.

Test lead holes: standard or optional for the box.

3、 Performance and reliability analysis

1. Temperature performance

Uniformity and fluctuation: are core indicators for measuring the stability of box structure design, airflow organization, and control system. High performance requires maintaining high consistency throughout the entire workspace and time.

Alternating followability: The ability of the device's actual temperature curve to match the set curve during the programmed heating or cooling period. Excellent control systems can reduce tracking errors.

2. Long term operational stability

The brand selection and quality of core components such as compressors and controllers are the foundation.

The electrical design of the system, the welding process of the refrigeration pipeline, and the assembly quality collectively determine the operating time of the equipment under long-term alternating stress.

3. Security protection system

Electrical safety: overload protection, leakage protection, short circuit protection, grounding protection.

System safety: Compressor overpressure/overheating/overcurrent protection, heater dry burning/overheating protection, studio overheating protection, fan overload protection.

Emergency safety: independent over temperature protector.

4、 Key points for evaluating the technical capabilities of manufacturers

1. R&D and design capabilities

Capable of thermodynamic and fluid dynamics simulation analysis to optimize air ducts and temperature fields.

Capable of independently developing and integrating electrical control systems.

2. Production and Quality Control System

Standardized assembly process flow.

Strict factory inspection standards are usually followed for performance testing based on national standards such as GB/T 10592-2008.

3. Core component supply chain

The key components (compressor, controller, sensor) are sourced from international or domestic sources to ensure performance and reliability.

4. Technical support and after-sales service

Provide professional technical selection consultation.

Having a fast response after-sales maintenance network.

Compliant with standards:

comply withGB/T2423.1Low temperature test methodGB/T2423.2High temperature test methodGB/T2423.3Constant humidity and heat test methodGB/T2423.4Alternating damp heat test methodGB/T10592Technical conditions for high and low temperature testingGB/T10586Technical conditions for wet heat testGJB150.3High temperature testGJB150.4Low temperature testing and other standards.

test chamberSpecifications

☆ ModelTH-80Internal dimensionsD×W×H 400×400×500

☆ ModelTH-225Internal dimensionsD×W×H 500×600×750

☆ ModelTH-500Internal dimensionsD×W×H 700×800×900

☆ ModelTH-800Internal dimensionsD×W×H 800×1000×1000

☆ ModelTH-1000Internal dimensionsD×W×H 1000×1000×1000

Refrigeration system:

☆ Compressor: Fully enclosed original French Taikang.

☆ Cooling method: single（double）The mechanism is cold.

☆ Condensation method: forced air cooling.

☆ Dehumidification adopts the evaporator coil dew point temperature laminar contact dehumidification method.

☆ The solenoid valve, oil separator, drying filter, repair valve, refrigerant flow window, and storage tank are all imported original parts.

Technical Specifications:

☆ Temperature range:-20℃～150℃、-40℃～150℃、-60℃～150℃、-70℃～150℃

☆ Humidity range:30%～98%R.H（Temperature is at25℃～80℃）

☆ Temperature fluctuation: ≤±0.5℃

☆ Temperature uniformity: ≤±2℃

☆ Humidity fluctuation:+2%The-3%R.H

☆ Heating rate:1.0～3.0℃/min

☆降温速率：0.7～1.2℃/min

☆ Humidity fluctuation range:40%～98%R.H

☆ Time setting range:0～9999h

☆ Power supply voltage:AC380V/50HZ

☆ The inner liner is made of imported mirror stainless steel plate（SUS304）.

☆ The shell is made ofA3The steel plate is processed and formed by CNC machine tools, and the surface of the shell is sprayed with plastic for a smoother and more beautiful appearance.

☆ High density glass fiber cotton is selected as the insulation material, with a thickness of100mm/120mm.

The observation window is made of multi-layer hollow tempered glass, equipped with lighting fixtures, and the inner adhesive sheet conductive film is heated and defrosted to observe the test process clearly.

A double-layer high temperature resistant sealing strip is used between the door and the box to ensure the sealing of the testing area.

The temperature cycling system adopts a temperature resistant low-noise air conditioning motor and a multi blade centrifugal fan.

☆ The bottom of the machine adopts a fixable designPUActivity wheel, easy to move. ☆ The left side of the box is equipped with a Φ50mmOne test hole, which can be used for external testing power or signal lines. Any increase in aperture or number of holes should be explained.

Security protection system:

Protection measures include overall equipment overheating, refrigeration system overload, refrigeration system overpressure, electrical leakage, water shortage, operation indication, automatic shutdown after fault alarm, etc.

Equipment usage conditions:

☆ Environmental temperature:5℃～30℃, environmental humidity: ≤85%R.H.

☆ Place the machine in front, back, left, right, and right directions80Do not place anything in centimeters.

☆ Free home delivery, and after the installation and debugging of the equipment is completed, relevant technical personnel will receive basic operation training.

Manufacturer of high and low temperature alternating humidity test chamberControl system:

☆ ImportedTEMI880The LCD touch display screen is programmable, easy to edit programs, and easy to operate on the screen.

☆ Accuracy:0.1Resolution: ±0.1℃, temperature sensor:PT100Platinum resistance thermometer.

☆ It has the function of automatic calculation, which can immediately correct the temperature and humidity change conditions, making temperature and humidity control more accurate and stable.

The controller operation interface is available in both Chinese and English, and the real-time operation curve chart can be displayed on the screen.

After inputting the data and experimental conditions, the controller has a screen lock function,Avoid stopping the machine due to human touch.

The controller has an automatic screen saver function, which better protects the LCD screen and prolongs its lifespan during long-term operation.

☆ Has100Group program, each group100Segments, each segment can be looped999The capacity of the steps is set to a maximum value of at each time interval99h59min.

☆ HasRS-232orRS-485Remote communication interface, which can be programmed on a computer to monitor the testing process and perform functions such as automatic power on/off.

Heating and humidification system:

☆ High temperature, low temperature, humid heat * independent system, using far-infrared nickel alloy high-speed heating electric heater.

The external boiler steam humidifier has energy-saving and consumption reducing functions, and has automatic water level compensation.