Climatic chamber is a highly professional equipment where it is possible to simulate special environmental conditions for making tests on samples at particular circumstances.
The climatic chamber is able to control temperature and humidity.
To control the temperature, it is necessary that the chamber is able to perform two functions: heating and cooling and is also able to homogeneously distribute the temperature inside the test compartment.
Particular technical measures on the air distribution inside the chamber will allow having a high level of uniformity over time and homogeneity in the space of the temperature values, ensuring to all parts and surfaces of the specimen to be subjected to the same temperature value.
The mechanical cooling system of a climatic chamber consists of a closed circuit system whose main components are: Compressor, Condenser, Expansion valve, Evaporator.
The mechanical heating system consists of the electrical resistances positioned near the ventilation system: the heated air is conveyed through the ventilation inside the test compartment.
The action of the two Cooling and Heating functions is regulated by the PLC, according to the parameters of the cycle set by the operator to guarantee the required performances.
To control humidity, the chamber must be able to perform two functions: humidification and dehumidification and is also able to homogeneously distribute the humidity inside the test chamber.
Direct humidification is performed by an electric humidifier whose steam is fed through a hole in the air stream after the air recirculation fan. In this way, humidification without aerosol is ensured. The humidifier is controlled by a dedicated algorithm for improved reliability.
The chamber is dehumidified by a mechanical system based on the so-called cold finger principle, using the same mechanical system used for cooling. According to this principle, when an object with a lower temperature is exposed to a higher ambient temperature, the moisture in the air condenses on the surface of the coldest object. Inside the climatic chamber, the evaporator is the element with the lowest temperature and a dedicated section is then used to lower the humidity levels in the test chamber when required.