This classification perspective is crucial as it directly determines the testing efficiency, temperature range, and applicable sample types of the equipment. The specific classification and characteristics are as follows:

1. Classify by temperature switching method (core classification method)

This is the most mainstream classification criteria, with the main difference being whether the "high temperature zone, low temperature zone, and sample zone" are independent, as well as the implementation logic of temperature switching.

(1) Three box thermal shock test chamber

Structural features: It has three independent chambers, namely a high-temperature chamber, a low-temperature chamber, and a sample chamber located in the middle.

Working principle: By switching the airflow channels between the sample box and the high-temperature or low-temperature box, the high-temperature or low-temperature airflow can quickly enter the sample box to achieve temperature shock.

Core advantages:

The temperature switching speed is extremely fast, usually reaching 10 ℃/min or even higher.

The high-temperature and low-temperature zones can be independently preheated and precooled, with high testing efficiency, suitable for high-frequency and high demand impact testing.

Applicable scenarios: Products with strict requirements for temperature shock rate, such as semiconductor chips, automotive electronics, aerospace components, etc.

(2) Two box thermal shock test chamber

Structural features: There are only two independent chambers, namely a high-temperature chamber and a low-temperature chamber, and the sample needs to move between the two chambers.

Working principle: The sample is quickly transferred from the high-temperature box to the low-temperature box through mechanical transmission mechanisms such as guide rails and hanging baskets, or vice versa, to complete the temperature shock cycle.

Core advantages:

The structure is relatively simple and the manufacturing cost is lower than that of a three box type.

The temperature range covers a wide range, and some models can achieve an impact range of -80 ℃ to 200 ℃.

Applicable scenarios: Products that require moderate impact rate, large sample volume or heavy weight, such as household electrical components, small machines, hardware, etc.

(3) Single box (basket type) thermal shock test chamber

Structural features: There is only one main box body, which is separated from the high temperature zone and low temperature zone by a hanging basket structure inside (or achieved by quickly injecting high and low temperature media).

Working principle: The sample moves rapidly with the basket between the high and low temperature areas inside the box, or temperature changes are achieved by quickly filling the box with high and low temperature gases.

Core advantages:

Small in size and occupying minimal space, suitable for laboratory testing of small samples.

Easy to operate and low maintenance cost.

Applicable scenarios: Small sample testing during the research and development phase, or scenarios with lower requirements for impact rate and temperature range, such as electronic components, material samples, etc.

2. Classify by cooling method (auxiliary classification method)

The main difference lies in the cooling logic of the equipment cooling system, which affects the installation environment and operating costs of the equipment.

Air cooled cold shock test chamber: Cooling is achieved by exchanging heat with the outside air through a fan and heat exchanger. No need for external cooling water, flexible installation, suitable for venues without water or inconvenient water supply, but the cooling efficiency is greatly affected by environmental temperature.

Water cooled thermal shock test chamber: cooling is achieved through an external cooling water circulation system. The cooling efficiency is high, stable, and not affected by environmental temperature, but a cooling water system is required, resulting in relatively high installation and operating costs.