High and low temperature alternating test chamberIt is used to simulate the test specifications of heat resistance, humidity resistance, cold resistance, dry resistance and quality management engineering of automation components, automobile parts, electronic and electrical components, instrumentation, materials, plastics, chemicals, food, pharmaceutical industries and related products under the combined conditions of climate and humidity (high and low temperature operation, storage, temperature cycle, high temperature and high humidity, low temperature and low humidity, condensation test, etc.), and evaluate whether the adaptability and characteristics of the test product itself change under given environmental conditions.
1. Characteristics of high and low temperature alternating test chamber:
1. The inner side of the high and low temperature alternating test chamber adopts 10mmSUS304B stainless steel plate, the outer side is made of 10mm cold-rolled steel plate is sprayed, and the insulation material is made of ultra-fine glass insulation wool.
2. An air conditioning cabinet is set up at the back of the high and low temperature alternating test chamber studio, and evaporators, electric heaters, humidifiers, fans, fan volutes and other equipment are installed in the middle. The box has an RS-485 interface, which can be connected to a logger and a computer, and can record the change of temperature parameters.
3. The mirror stainless steel liner is adopted, the four corners are rounded, and the shelf bracket can be adjusted arbitrarily to facilitate the cleaning of the box, and there is a large observation window and a lighting lamp to clearly observe the situation in the box at any time.
4. There is a test hole with a diameter of 25mm on the left side of the box, which can be used for external testing.
5. The air supply mode in the test chamber is the upper air supply and lower return air mode.
2. The role, composition and function of the three key systems of the high and low temperature alternating test chamber will be introduced in detail
1. Heating system.
The heating system is one of the key systems of the high and low temperature alternating test chamber, and its function is to raise the temperature inside the equipment to the required test temperature. The heating system usually consists of a heating element, a thermostat and a safety protection device. The heating element is an important part of achieving the heating effect, and it is necessary to pay attention to whether its power and quantity can meet the test requirements. Thermostats are used to monitor and control the temperature of the equipment to ensure that the internal temperature of the equipment is always within the desired range. Safety protection devices include over-temperature protection, short-circuit protection, etc., which are used to avoid safety problems such as high temperature and fire.
2. Refrigeration system.
The refrigeration system is the second critical system of the equipment, which is used to achieve low-temperature testing inside the equipment. The refrigeration system usually consists of a compressor, evaporator, condenser, valve, etc. In a refrigeration system, the compressor is an important part of compressing the gas into a liquid and transferring it to the evaporator. In the evaporator, the liquid is turned into a gas by the action of the diffuser valve, and the heat is absorbed through evaporation, so as to achieve the purpose of cooling. In the whole refrigeration system, it is necessary to ensure the matching and sealing between the various components to ensure the stability and durability of the system.
3. Control system.
The control system is the third key system of the high and low temperature alternating test chamber, which is mainly responsible for the automatic control and monitoring of the equipment. The control system includes two parts: computer control system and electronic control system. Among them, the computer control system is the core of the equipment, which can be set up, operated and monitored through the interfaceThe electronic control system is a subsystem under the computer control system, which is mainly used to control the movement and parameters of the equipment, and realize the regulation and monitoring of the heating and cooling system.