Construction and System Software of Two-zone Thermal Shock Test Chamber
Construction of Two-zone Thermal Shock Test Chamber:
1, Construction mode of environmental test chamber:
Environmental test chamber is composed of a high temperature test chamber located at the upper end, a low temperature test chamber located below, a freezer cabinet located at the back and a home appliance control chamber (system software) located on the right. In this way, the shell occupies a small area, compact structure, beautiful appearance design, the freezer unit is placed in a separate generator chamber body, in order to reduce the vibration and noise of the freezer unit operation on the environmental test chamber harm, in addition to the installation and maintenance of the generator set, the household appliance operation panel is placed on the right panel of the environmental test chamber to facilitate the operation of the actual operation;
2, Shell surface raw materials: cold-rolled plate, surface electrostatic powder spraying solution;
3, The shell cavity raw materials: imported stainless steel plate (SUS304);
4, Thermal insulation material: heat resistant hard plastic polyamine ester foam + foam glass plate;
5, The door: single door, equipped with double silicone rubber sealing and sealing rubber strip heating equipment, under the self-limiting temperature heating zone, to avoid the experiment essence and frost;
6, Test rack: move up and down left and right sliding type stainless steel plate test rack. The pneumatic double-effect cylinder shows a stable and symmetrical driving force. The positioning device of the test rack uses an electromagnetic field triggered limit switch;
7, Cable wire installation hole: the upper end of the test rack and the top of the high temperature test chamber is provided with a telescopic cable threading tube.
Air conditioning system software of two-zone thermal shock test chamber:
1, Gas control method: forced circulation system natural ventilation, balanced temperature control method (BTC). The method refers to the refrigeration unit in the continuous operation of the condition, the automatic control system according to the temperature point set according to the PID automatic and operational output results to manipulate the electric heater's heart output, the ultimate UI will exceed this stable balance.
2, Gas circulation system equipment: embedded central air conditioning room, air supply mode channel and stainless steel plate short-axis exhaust fan, the application of refrigeration unit and kinetic energy adjustment system software, according to the exhaust fan to carry out a reasonable heat exchanger, more than the purpose of maintaining temperature change. According to the improved air flow of the gas, the total gas flow and the working capacity of the heat exchanger with the electric heater and the surface cooler are improved.
3, Evaporative cooling method: fin type air heat exchanger.
4. Gas heating method: select nickel-chromium wire electric heater.
Heat Dissipation Method of Thermal Shock Test Chamber Refrigeration Unit
Generally speaking, thermal shock test chamber is divided into two refrigeration methods: air-cooled and water-cooled. The accuracy of the test results not only depends on the excellent process quality of the equipment itself, but also is closely related to the cooling efficiency of the refrigeration unit. So what factors affect the heat dissipation efficiency?
In short, the air-cooled type has the greatest impact on its heat dissipation efficiency or environmental factors. For water-cooled refrigeration units, the key factor is the water tower configured as a fixed equipment, the following is the method of improving the heat dissipation efficiency of different cooling methods.
Firstly, air-cooled thermal shock test chamber：
Reason: Because the heat dissipation of the air-cooled refrigeration unit mainly relies on the electronic fan to dissipate a large amount of heat through the fin. If the environment is very dusty, the equipment is affected by the wind, a lot of dust will adhere to the fan and fins. Although less dust does not have any effect on the air-cooled refrigeration unit, when the dust on the fins continues to increase, it will directly affect the heat dissipation effect of the air-cooled refrigeration unit, resulting in poor heat dissipation effect and the corresponding cooling capacity.
1, The user should provide a relatively clean use environment for the air-cooled refrigeration unit (smooth ventilation is the best), and try to stay away from the harm of all kinds of dust. This will extend the frequency of inefficient operation of air-cooled refrigeration units because there is more dust in the environment, and give the unit equipment a safe and stable operation environment.
2, Keep the equipment clean and tidy, and clean the fins regularly. Can be washed with wind and tap water, if the environment is harsh, the dust impurities on the fins are more oil, then rinse with tap water first, and then spray on cleaning dust, after 10 minutes or so, and then repeatedly rinse with tap water. After using the air-cooled refrigeration unit for a period of time, it is necessary to carry out a comprehensive cleaning for the environment and the machinery and equipment.
Secondly, water-cooled thermal shock test chamber：
Reason: Since most of the water tower is installed outside, it needs to withstand strong light radiation, higher temperature, and fast water evaporation, which is easy to cause insufficient water flow in the cooling water circulation, and finally cause poor cooling effect and even high pressure alarm.
1, Timely water supply.
2, Check whether the water supply valve is abnormal.
3, Check the running status of the water tower, if abnormal, it needs to be adjusted to normal state in time.
4, Clean the pipeline filter.
5, Keep the water source clean.
The main policy to improve the heat dissipation efficiency of the air-cooled thermal shock test chamber is to place the chiller outdoors, avoid direct sunlight as far as possible, and make a protective shed for the equipment if conditions exist. If it must be placed indoors, it is better to put it next to the window to maintain good ventilation, or install an air pipe to draw hot air to the outside.
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