Climatic chambers heat-cold-moisture (TCW) are designed to create special conditions that are closest to natural. However, outdated units did not give the desired result, so you had to constantly use additional equipment. Previously, this whole process took a lot of time and effort and did not always end successfully. But since the advent of improved models, the overall situation has changed dramatically.
General concept
Modern climatic chamber is a kind of container that allows you to reproduce the necessary environmental conditions as accurately as possible. For example, a certain temperature regime, ultraviolet radiation, change and maintain the parameters of air humidity, as well as control various chemical and aggressive substances. Suchdevices today are widely used in many industries, engineering and other fields. The work of all research centers is based on the most accurate results, so it is simply impossible to do without the use of climatic chambers.
Design Highlights
The climate chamber has a special design, including the following components:
- Shield. It houses all electronic equipment. It is installed on the side wall, the control is automatic.
- The steam generator is responsible for controlling the humidity inside the device. Water vapor is produced by boiling water or by ultrasonication. Operates in local automation mode.
- The working space is made in the form of a kind of container, equipped with heat exchangers. It is thanks to him that the most comfortable test mode is provided. Since the container has a viewing window, you can observe any changes that occur during the experiment.
- The cooling structure is installed inside the frame and mounted on a special mounting plate. Its main function is the uniform distribution of air over the entire area.
Due to the presence of locking mechanisms, the climatic chamber is not able to spontaneously open, which allows preventing the penetration of moisture and completely eliminating any changes in the operating temperature. Its body is made of steel profile coated with a special protective composition. This materialallows for a long time to maintain the necessary technical characteristics, as well as a presentable appearance. The design is mounted on special roller blocks if the chamber volume is not more than 500 liters. If the size exceeds this parameter, then it is installed only permanently.
Climatic heat/cold/moisture chambers (TVX)
A feature of this type of units are the steam generators used for operation. Depending on the internal device, they are:
- cold - exposure to ultrasound;
- hot - by heating.
In order for the tests to be carried out with the greatest accuracy, the walls are equipped with a special heat-insulating material. And inside their surface is sheathed with high-quality stainless steel.
Most often, the climate chamber heat/moisture/cold is equipped with a two-stage refrigeration unit.
Technical characteristics of the TXV camera
The test cycle is performed according to the following algorithm:
- cooling down to -50°C takes up to 2.5 - 3 hours;
- exposure at this temperature 2.5 h + 0.5 h;
- heating up to +18°C takes 2-2.5 hours;
- holding this temperature 2, 5 - 3 hours;
In order for all elements to function with maximum accuracy, the climatic chamber is equipped with a controller.
Specifications:
- indication resolution - 0.1°С;
- time to reach maximumtemperature - 75 min;
- time to reach minimum temperature - 90 min;
- type of cooling - air;
- temperature range - from -60 to +75°С;
- error - ±2°С.
How to choose a CHS: basic criteria
First of all, before choosing a specific climate chamber model, you need to pay attention to the following points:
- Equipment with modern control systems.
- Auto control.
- Possibility of completing with standard or individual additional equipment (matching parameters).
- Quick change in temperature conditions, this is especially important when a climatic cold chamber (electronic freon control) is installed.
- Reputation of the manufacturer and delivery time.
- Compressor specifications.
- Use environmentally friendly coolers in the chamber.
- The presence of a controller.
- Materials from which the unit is made.
Highlights
- Moving the chambers is strongly discouraged as the performance of the pressure calibrator may be impaired.
- An important element is also the cooling device, which ensures that the temperature drops at the right time.
- Thanks to the presence of automation, any spontaneous shutdowns and overheating are completely excluded.
- Automaticthe control shield is placed on a special panel that prevents damage to it.
In order for the climate chamber to function properly, various high-pressure media are used to reduce expected power and operating temperature losses, as well as fluctuations in key indicators that are clearly monitored throughout the experiment.
