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1、 Product Description:

This laboratory can be used to determine the suitability of electronic products, components, materials, etc. for use and storage under the conditions of high humidity, low humidity, ice accumulation, water dripping, spray, constant damp heat, temperature cycling change, and damp heat of condensation on the humidity surface.

This laboratory adopts a relatively reasonable structure and stable and reliable control method, making it aesthetically pleasing, easy to operate, safe, and with high humidity control accuracy. It is an ideal equipment for conducting low humidity tests, constant temperature and humidity tests, and alternating humidity tests.

2、 Product advantages and technical features

1.2.1 Utilize a multi-channel, environmentally friendly and energy-saving (low-noise) mechanical compression refrigeration system.

All materials, parts, components, raw materials, etc. of the device, whether domestically produced or imported, are made of environmentally friendly products; Based on the characteristics of mechanical compression refrigeration, a two-stage multi-channel main and bypass system is adopted. The multi-channel main and bypass can be adaptively selected and activated according to different working conditions. The entire control is automatically implemented by an intelligent control system according to the working conditions, changing the traditional way of using a temperature controller to control the heater to offset the cooling capacity to control the cooling capacity. So as to achieve energy-saving effect, not only does the energy consumption account for only 80% of similar products. It also reduces the operating load of the refrigeration compressor, reduces equipment vibration and noise, and improves control accuracy. To achieve better energy-saving effects, frequency conversion technology is adopted to adapt the refrigeration output of the refrigeration compressor to various temperature change rate requirements in the laboratory, while controlling the power loss during use to achieve energy-saving effects. Use sound-absorbing and silencing methods in different parts of the entire structure and mechanical working process to reduce the overall noise of the equipment.

1.2.2. Independently developed multi-channel and multi-stage throttling system (refrigeration system).

The refrigeration system of this equipment is designed with different capillary main paths and bypass paths according to different operating conditions. The capillary throttling system is automatically controlled and adjusted by the intelligent communication control system based on the operating conditions to ensure that the flow rate can be adjusted, achieving the purpose of temperature change. Moreover, the temperature field changes uniformly and the temperature fluctuation is minimal.

1.2.3. Apply a broadband compression balance temperature control system to achieve rapid temperature control through a fast convergence PID adaptive algorithm.

By using a temperature mixing chamber, a static pressure chamber, and a forced air duct system with centrifugal blades, sufficient exchange of cold and heat is ensured, and air is evenly supplied through the top orifice plate to each space in the working room (experimental area) to achieve temperature uniformity; To achieve rapid temperature convergence, our company has collaborated with Sanyuan Corporation in South Korea to develop a dedicated PID adaptive algorithm suitable for our company

The control method continuously adjusts the control according to the temperature situation during the control process, achieving the control objectives of fast sword retraction, small temperature overshoot, and high stability.

1.2.4 Implement remote visual control.

The device is equipped with a human-machine management interface and a touch mode automation control system to achieve automatic control; Simultaneously, connect to remote computers through RS485 communication interface to achieve network management and remote monitoring. The entire system is controlled and managed through a graphical interface, which is simple and fast, with automatic fault prompts. The graphical prompts are energy-saving and provide solutions to guide users in quickly troubleshooting.

3、 Performance indicators and system composition of the laboratory for icing and freezing rain:

Project Description

Product Name: Ice accumulation and freezing rain laboratory

Model GC-DY-8000D

Sample restrictions: This testing equipment prohibits the testing of flammable, explosive, and volatile substance samples; Testing for storing samples of corrosive substances, testing for storing organisms, testing and storing samples of strong electromagnetic emission sources

Volume, weight, and size

The nominal content area is 8m3

The effective size of the inner box is 2000 × 2000 × 2000 (mm) (depth × height × width) D × H × W (mm)

The effective dimensions of the outer box are approximately 3100 x 2600 x 2200 (mm) (depth x height x width) D x H x W (mm) (including motor height)

Weight approximately 1500 kg

Power, current, and power supply

The maximum installed power is about 18.5KW

The maximum current is about 2*

Power supply conditions and sources

3 ￠ 380VAC ± 10%, 50Hz three-phase four wire system N+protective grounding

Voltage allowable fluctuation range: 10%

Allowable frequency fluctuation range: (50 ± 0.5) Hz

The grounding resistance of the protective grounding wire is less than 4 Ω

Require users to configure corresponding capacity air or power switches for the equipment at the installation site, and this switch must independently control the use of the equipment

performance index 

Functional requirements: 1. (Air) indoor space cooling, heating, humidification, and dehumidification;

2. According to the temperature and humidity settings, the indoor space reaches the set temperature and humidity

The test environment conditions are a temperature of+25 ℃, a relative humidity of ≤ 85%, and the values measured under the condition of no sample in the test chamber.

Meet the testing standards

Test method 1. GB2423.1-2008/IEC6008-2-1-2007 Environmental testing for electrical and electronic products Part 2: Test methods Test A: low temperature

2. GB/T 2423.2-2008 Environmental testing for electrical and electronic products - Part 2: Test methods - Test B: High temperature

3. GJB150.3A-2009 High temperature test method

4. GJB150.4A-2009 Low temperature test method

5. GB/T 10589-2008 Technical Conditions for Low Temperature Test Chamber

6. GB/T2423.3-2008 (IEC68-2-3) Test Ca: Constant Damp Heat Test Method

7. GJB150.9A-2009 Damp Heat Test Method

8. G/BT 2423.4-2008/IEC6008-2-30:2005 Test Db: Alternating Damp Heat Method

9. GB/T5170.18-2005 Basic parameter calibration method for environmental testing equipment for electrical and electronic products Temperature/humidity combined cycle testing equipment

10. GB/T10586-2006 Technical Conditions for Damp Heat Test Chamber

Temperature and humidity range

Temperature and humidity range Temperature range:- 60～+100℃

Humidity range: 20-60% RH (as shown in the figure)

Control accuracy Temperature resolution: 0.01 ℃ Humidity resolution: 0.1% RH

Temperature deviation: ± 1.5 ℃ Humidity deviation: ±2%RH

Temperature uniformity: ≤ 2 ℃ Humidity uniformity: ≤ 3%RH

Temperature fluctuation: ± 0.5 ℃ Humidity fluctuation: ± 2% RH

Heating and cooling rate (no load)+20 ℃ →+100 ℃ ≤ 55 min

+20℃ →-60℃ ≤65 min

Precipitation rate, environmental temperature, cooling time: RT → -50 ℃, average unloaded state throughout the process ≥ 1 ℃/min

Cooling rate of water temperature: RT → 1 ℃, average ≥ 0.7 ℃/min

Approximately 25mm/h, with adjustable raindrop size

The precipitation period can be set arbitrarily from 1 minute to 99 hours

The rainfall device of the precipitation mechanism is designed at the top of the box. In order to prevent the water pipes from freezing and being hidden in the insulation layer of the constant temperature room, a corresponding number of drip holes are drilled. Seamless welding is used around the holes and the water pipes to prevent water from flowing into the insulation layer. A high-temperature water pump is installed on the side to pump water through the water pipes and drip rain into the box.

When the precipitation stops, the water in the water pipe will automatically flow back, and there should be no water stored in the pipe, which can ensure that the nozzle of the low-temperature water pipe at -55 degrees does not freeze

The design principle of ice mist is the same as that of precipitation structure, except that there is an additional nozzle for ice mist. A high-pressure water pump is used to turn water into mist and drop it into the box through the nozzle.

(If it falls into the box in the form of fog at -55 ℃, it will affect the evaporative cooling dissipation, which will cause icing on the evaporator, thus affecting the cooling. At the same time, in the process of precipitation and spray, the temperature difference between the water temperature and the temperature in the box will affect the temperature uniformity. Please be informed.)

Note: The above performance indicators are measured under the conditions of an ambient temperature of+25 ℃, a water temperature of 28 degrees, a relative humidity of ≤ 85%, and no sample.

structure characteristics

Box body