How does a thermal shock test chamber work?

2022-09-05 CHAMBER

What is the thermal shock test chamber?

Thermal Shock Chamber is used to test the material structure or composite material, in an instant by extremely high temperature and extremely low-temperature continuous environment can bear the degree, in the shortest time test its thermal expansion and contraction caused by chemical changes or physical damage.


Two-box thermal shock test chamber

The main features of a thermal shock chamber:

1. High efficiency and energy saving: Compared with other testing methods, the thermal shock testing has the advantages of high efficiency and energy saving because it only needs to maintain a certain temperature range instead of maintaining two different temperature zones.

In addition, the thermal shock chamber is suitable for working continuously without stopping work, which saves time and money.

2. Full mechanical control system: The thermal shock chamber has a full mechanical control system that can maintain a constant temperature and humidity automatically.

It can also be used for various types of materials (such as glass fiber reinforced plastics) at different temperatures (from -70 ℃ ~ +150 ℃). There are no special requirements for testing materials before using them in this machine.


What is the purpose of thermal shock?

Thermal shock is a sudden temperature change that can cause damage to material. The damage caused by thermal shock depends on the temperature difference between the object and its surroundings, as well as the rate at which it changes temperature.

Thermal shock occurs when an object moves from one temperature to another very quickly, causing different parts of the object to expand at different rates.

This creates internal stresses within the material, which can lead to failure if the stresses are not relieved.


Three box thermal shock test chamber

There are three main ways to reduce thermal shock:

Reducing the thermal gradient seen by the object, by changing its temperature more slowly or increasing the material's thermal conductivity (how well it transfers heat).

Reducing the material's coefficient of thermal expansion (CTE), which is its tendency to expand when heated and contract when cooled.

Increasing its strength, so that it can withstand some deformation without breaking down internally where stress is greatest.


How does a thermal chamber work?

A Temperature Chamber, also known as an environmental test chamber, performs thermal tests through the use of convection.

They typically use a fan for the forced air convection, like a convection oven used in your house; however, instead of making cookies, you are testing products and equipment.

There are two main types of temperature chambers: hot and cold. The difference between them is how they accomplish the thermal test. A Hot Chamber raises the temperature of a product by heating up the inside of the chamber with resistance heaters or infrared lamps.

A Cold Chamber lowers the temperature of a product by cooling down the inside of the chamber with refrigeration units or liquid nitrogen. Both methods require that you load your product into an enclosure with sensors on all sides so that it can be monitored by computers inside and outside of the chamber.


A thermal chamber is used to simulate extreme conditions. It can maintain a constant temperature, or it can be used to simulate a changing temperature over time.

For example, if you want to test how well your product will work in hot climates, such as in Arizona or Florida, then you would use athermal chamber to heat up your product to 120°F and see how it performs under those conditions.

If you wanted to see how well your product worked in ice-cold temperatures like Minnesota or Alaska then you could use the same device but bring down the temperature all the way down to -30°F (or colder).

Thermal chambers are also used for moisture testing by running water over samples at different pressures and temperatures so that manufacturers can see how well their products stand up against moisture damage from weather conditions outside their control.


Why thermal shock test is required?

Thermal shock testing reduces the risk of product failure in the field by replicating a quick transition between two extreme temperatures; for example -50°C to 71°C in less than one minute.

Thermal shock, also known as thermal cycling, is a test method used to simulate the conditions that a product will experience when exposed to temperature changes. It is not uncommon for components and materials to fail when exposed to sudden changes in temperature.

For example, it is possible for a car’s cooling system to fail if the engine block expands quickly during the summer months, then shrinks again during winter. This can lead to cracks and leaks within the engine block and may cause a breakdown while driving down the road.

The same thing can happen with other products that have moving parts or components that expand and contract due to changes in temperature.

If you’ve ever used one of those plastic cups with an attached lid, then you already know what I mean.

If you put hot liquid into the cup and then put it back into its box without allowing it time to cool down first, there’s a good chance that when you take it out again later on – after only 20 minutes or so – you might find yourself with some nasty burns


The Bottom Line

NOKI’s thermal shock testers provide a faster, more cost-effective way of determining the quality of materials used in electronic devices as well as their ability to operate under extreme temperature conditions without failure.
Our equipment can be configured with different types of chambers including hot/cold chambers, cold rooms, etc., allowing us to find solutions for virtually any application requirement.
NOKI Thermal Shock Testers have extensive experience in the instrumentation industry and are ready to help you with your test chamber needs. Visit our website today to get more information about our products and services.

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