2、 Box structure
1. The box adopts an integral structure.
2. The inner side of the box is made of 1.0mm SUS304B stainless steel plate, and the outer side is made of 1.0mm cold-rolled steel plate sprayed with plastic. The insulation material is ultra-fine glass insulation cotton.
3. The door seal adopts double-layer silicone rubber sealing material.
4. The observation window is made of multi-layer conductive film tempered hollow glass, with a size of 200 × 300mm. In order to prevent frosting of the glass at low temperatures, a specially designed built-in heating wire is specially designed to surround it, and a lighting lamp is installed to provide illumination for observation.
5. There is a 50mm test hole with a plug on the side of the box. The plug material is low foaming silicone rubber, which can withstand high and low temperatures and has insulation effect.
6. There is an air conditioning cabinet installed at the rear of the box workshop, in which equipment such as evaporators, electric heaters, humidifiers, fans, and fan volutes are installed.
7. Place the temperature sensor at the air outlet.
The air supply method inside the test chamber is upward air supply and downward return air supply.
3、 Refrigeration system
1. Low temperature refrigeration adopts the French "Taikang" fully enclosed compressor unit. Other refrigeration components such as imported brand products from Denmark's DANFOSS and Italy's CASTEL. Use R404A environmentally friendly refrigerant. The evaporative condenser serves as both a high-temperature evaporator and a low-temperature condenser.
To ensure the safe operation of the system, high-voltage control, overpressure, overload and other protection systems need to be installed in the system. At the same time, in order to monitor the operation of the system, a high voltage meter is installed at the high voltage end to monitor the operation of the system.
3. The cooling capacity adjustment adopts the split method.

Heating rate: 20 ℃~+150 ℃/45 minutes (under no load)

Heating load: 250W (40℃,90%RH)

Temperature stability: ± 0.2 ℃

Humidity stability: ± 2%

The thermal shock testing machine is used to test the degree to which material structures or composite materials can withstand continuous environments of extremely high and low temperatures in an instant, in order to test the chemical changes or physical damage caused by thermal expansion and contraction in a short period of time Applicable objects include metal, plastic, rubber, electronics Waiting for materials can serve as a basis or reference for product improvement

In order to simulate different electronic components and the temperature conditions encountered in actual use environments, changing the temperature difference range and rapid temperature changes can provide a more rigorous testing environment, shorten testing time, and reduce testing costs. However, it is necessary to pay attention to the potential additional impact on material testing and the occurrence of non use state destructive tests. The RAMP test conditions are indicated as: Temperature Cycling or Temperature Cycling Test, which refers to temperature cycling (temperature shock with controllable slope), while the failure mechanism remains unaffected.

1. GB/T2423.1-2001 Low temperature test methods;

2. GB/T2423.2-2001 High temperature test methods;

3. GB/T2423.22-1989 Temperature change test N;

4. National Army Standard GJB150.3-86;

5. National Army Standard GJB150.4-86;

6. National Army Standard GJB150.5-86;

7. GJB150.5-86 Temperature shock test;

8. GJB360.7-87 Temperature shock test;

9. GJB367.2-87405 Temperature shock test.

10. SJ/T10187-91Y73 series temperature change test box - one box type

11. SJ/T10186-91Y73 series temperature change test box - two box type

12. Meet the standard IEC68-2-14_test method N_temperature variation

10. GB/T2424.13-2002 Test Methods - Guidelines for Temperature Change Test

11. GB/T2423.22-2002 Temperature variation

12. QC/T17-92 General rules for weather resistance testing of automotive components,

13. EIA364-32 thermal shock (temperature cycling)

Equipment usage:
The constant temperature and humidity test chamber, also known as the environmental test chamber, constant temperature and humidity test chamber, high and low temperature alternating test chamber, damp heat test chamber, etc., is an essential testing equipment in the fields of aviation, automotive, home appliances, scientific research, etc. It is used to test and determine the parameters and performance of electrical, electronic, and other products and materials after high temperature, low temperature, alternating damp heat or constant temperature tests.
Applicable industries:
Suitable for quality testing of electronic, plastic products, electrical appliances, instruments, food, vehicles, metals, chemicals, building materials, aerospace, medical and other products.
1、 Product Usage
The specialized constant temperature and humidity test chamber for the electronics industry is suitable for examining the moisture resistance of electrical and electronic products, components, parts, and their materials under different temperature and humidity conditions. It can also be used as an adaptability test for storage, transportation, and use in high and low temperature environments.
The temperature range of the constant temperature and humidity test chamber of Haotian equipment is divided into five points: ABCDE， Among them: A: 0 ℃~+150 ℃ B: -20 ℃~+150 ℃ C: -40 ℃~+150 ℃ D: -60 ℃~+150 ℃ E: -70 ℃~+150 ℃
Inner box capacity: From small 22L, 36L, 80L, 150L, 225L, 408L, 800L, 1000L and other standard models, users can customize according to their own requirements. Haotian equipment meets user requirements.

1. Superior design: curved shape and surface spray treatment, high-quality appearance, and flat non reactive handle, easy to operate, safe and reliable.

2. Bright and wide field of view large observation window: using three-layer vacuum coated windows and Philips energy-saving fluorescent lamps, no need for wipers to defog, maintaining clear observation effect, and allowing for real-time observation of the condition of the test sample.

3. Separation of humidification system pipeline and control circuit: The humidification system pipeline is separated from the power supply, controller, and circuit board to avoid affecting the circuit due to pipeline leakage and improve safety.

4. Advanced and reliable refrigeration and control system: original imported European and American fully enclosed compressors, imported environmentally friendly refrigerants, world-renowned brand refrigeration components, original imported LCD touch screen controller, user-friendly interface, easy to operate and learn.

(1) The test box body is in the form of an integral structure, with the refrigeration system located at the lower rear of the box and the control system located at the upper part of the test box.

(2) Inside the air duct interlayer at one end of the studio, there are devices such as heaters, refrigeration evaporators, and fan blades distributed; On the left side of the test box, there is a Ø 50 cable hole, and the test box is a single door (stainless steel embedded door handle)

(3) The double-layer high temperature and anti-aging silicone rubber seal can effectively ensure the temperature loss of the test chamber

(4) There are observation windows, frost prevention devices, and switchable lighting fixtures on the box door. The observation window adopts multi-layer hollow tempered steel