Thermal shock test chamber （3 zone）

Thermal shock test chamber introduction

The three-zone cold and hot thermal shock test chamber are also called the temperature shock test chamber and the high and low-temperature shock test chamber. There are two independently controlled high-temperature zones and low-temperature zones, one zone is above the other zone, and only the basket moves between the two zones, which is used to detect the adaptability of products to rapid temperature changes.

Three-zone thermal shock is suitable for aerospace, electronic instrumentation, materials, electricians, vehicle metals, electronic products, various electronic components, wires, cables, etc.

Thermal shock test chamber working principle

Through the heating system and refrigeration system of the unit, the sample is in a fixed working area, and the high and low temperatures are introduced into the studio by opening the air duct in the high and low-temperature area to realize the high and low-temperature impact of the sample;

During the moving process, the high and low greenhouses are connected, and the tested components also enter another chamber from high temperature or low temperature, so a large amount of cold and heat loads will be brought in, and the unit must quickly restore to the predetermined temperature of each greenhouse through the refrigeration system or heating system.

When the temperature of the chamber where the component under test is kept stable for a long time, the cooling or heating will be stopped. The cooling and heating room must also quickly return to the predetermined temperature. Repeat the above operation to complete multiple temperature cycle impact tests.

Thermal shock test chamber data

The thermal shock test chamber structures

The test chamber adopts an integral structure, that is, the text box, the refrigeration system, the heating system, the blower motor, and the electrical control cabinet are integrated as a whole, and the electrical control part is placed on the side of the test box for easy operation.

There is one cable hole on the side of the test box studio, the size is ф50mm; to prevent the signal line from slipping and falling into the test, the silicone plug will be placed in the test hole.

Sample studio size: 300*400*400mm(W*D*H); customizable size

The outer shell of the test box is made of iron plate and sprayed with plastic, and the inner shell is made of 304 stainless steel plate;

The thermal insulation material is made of polyurethane foam, with a thickness of 100mm, and the thermal insulation effect is good, and the outer surface of the test chamber does not form frost or condensation;

The box is provided with a condensate drain.

The equipment is a single door, and the doors are sealed with silicone rubber sealing strips; double doors can be customized.

There is an observation window on the door of the test box, and a lighting device (cold light source);

Thermal shock test chamber heating system:

Continuous PID adjustment, using SSR solid state relay as heating actuator, safe and reliable, with separate over-temperature protection system.

Air circulation system of thermal shock test chamber

In order to ensure a higher uniformity index, the test chamber is equipped with an internal circulating air supply system;

In the interlayer of the air duct at one end of the working room, heaters, refrigeration evaporators, fan blades and other devices are distributed; the fan is used to circulate the air in the box. When the fan rotates at a high speed, the air in the working room is sucked into the air duct from the middle. After cooling, it is blown out from the side of the air duct, and the air after heat exchange with the test product in the studio is sucked into the air duct and circulated repeatedly to meet the temperature setting requirements.

Thermal shock test chamber refrigeration system

The core of the refrigeration system is the compressor. In this solution, we use two Taikang compressor refrigeration systems to ensure the cooling requirements of the studio. Refrigeration cycle, the connecting container is the evaporator, and the function of the evaporative condenser is to use the evaporator of the low-pressure cycle as the condenser of the high-pressure cycle

Thermal shock test chamber control system

It adopts LCD touch screen programmable temperature controller and has the functions of automatic test operation and PID parameter self-tuning. The setting of the control parameters adopts the Chinese interface and the man-machine conversation mode. The automatic operation function of the refrigerator can be realized only by setting the temperature. The control system uses an intelligent control software system, which can automatically combine the working conditions of refrigeration, heating, and other subsystems, so as to ensure high-precision control in the entire temperature range and achieve the purpose of energy-saving and consumption reduction. The perfect detection device can automatically perform detailed fault displays and alarms. For example, when the test box is abnormal, the controller will automatically display the fault status.

Program capacity: 120 programs in total, program type: high-temperature→low temperature, low-temperature→high temperature, normal temperature→high-temperature→normal temperature→low temperature, normal temperature→low-temperature→normal temperature→high temperature, the maximum number of cycles is 999 times, and the maximum program segment time: 99 hours59 minute

Thermal shock test chamber safety protection system

Studio over-temperature protection;

heater short circuit protection;

Fan overload protection;

Compressor overpressure protection;

Compressor overload protection;

Compressor oil pressure protection;

Undervoltage and phase loss protection;

Safe and reliable grounding device.

Thermal shock test chamber test standard

Satisfactory test method

GB2423.1-2001 Test A low temperature test method

GB2423.2-2001 Test B high temperature test method

GB2423.22-2001 Test method for test N temperature change

GJB150.3-86 High temperature test

GJB150.4-86 Low temperature test method

GJB150.5-86 Temperature shock test

Product performance standards

GB10589-89 Technical conditions of low temperature test chamber

GB11158-89 Technical conditions of high temperature test chamber

GB10592-89 High and low temperature test chamber technology

This test equipment prohibits

Testing or storage of samples for flammable, explosive, and volatile substances or storage of samples for corrosive substances

Testing or storage of biological samples

Testing or storage of samples of strong electromagnetic emission sources Testing or storage of samples of radioactive substances Testing or storage of samples of highly toxic substances

Testing or storage of samples that may produce flammable, explosive, volatile, highly toxic, corrosive, and radioactive substances during testing or storage

Thermal shock test chamber voltage

AC220V 50HZ Single-phase three-wire system, single-phase 220V