What are the types of refrigeration systems for high and low temperature test chambers?

The heating and cooling system in the high and low temperature test chamber is the key component of the test chamber, which directly affects the quality of the test chamber and has always been the focus and difficulty of the research and design of the test chamber
.

Refrigeration systems are divided into different types, and different refrigeration systems have their own advantages and disadvantages
.

Today, we will introduce you to the main refrigeration systems of today's high and low temperature test chambers in detail
.

The usual refrigeration technology methods can be divided into the following three types: mechanical refrigeration, liquid nitrogen refrigeration, and a combination of mechanical refrigeration and liquid nitrogen refrigeration
.

Mechanical refrigeration technology has been quite mature, mainly divided into single-stage refrigeration and cascade refrigeration
.

Liquid nitrogen has good refrigeration performance, its normal pressure boiling point is -195.
8 degrees Celsius, the cooling low temperature can reach -150 degrees Celsius, and the cooling rate exceeds 60 degrees Celsius/min
.

As an industrial accessory product, the cost of liquid nitrogen is getting lower and lower, so liquid nitrogen refrigeration technology is gradually being applied to the required high cooling rate and ultra-low temperature environmental testing equipment
.

In summary, the selection of the refrigeration system of the high and low temperature test chamber refrigeration system mainly considers the relevant test requirements, and the refrigeration method is reasonably selected according to the requirements of temperature and refrigeration rate
.