Any object in nature, as long as the temperature is above absolute zero (-273.15 ° C), emits energy in the form of electromagnetic radiation over a very wide range of wavelengths, producing electromagnetic waves (radiation energy).
Commonly used industrial thermal imaging cameras, the working frequency band is usually in the long wave band of 8-14μm, and the temperature range is generally within -20-600 °C.
The infrared camera is a new type of photoelectric detector. It can instantly visualize the thermal information of the surface of the target to be measured, quickly locate the fault, and with the help of professional analysis software, can analyze and complete the power supply equipment of the air conditioner. Tests such as compressors, pipes, and air outlets ensure efficient and continuous operation of air conditioners.
The camera consists of two basic parts: optics and detectors.
The optical device concentrates the infrared radiation emitted by the object onto the detector, and the detector converts the incident radiation into an electrical signal, which is then processed into a visible image, ie, a heat map.
Thermal imaging camera features
The thermal imager is a state-of-the-art technology product that has its own distinctive features compared to traditional inspection tools:
1. The thermal imager can measure the moving object, and the ordinary temperature measuring instrument is difficult to do this;
2. It is possible to measure the target with a diameter of several micrometers or less by means of a microscope head;
3. The thermal diagnosis of the device can be performed quickly;
4. High sensitivity, according to the different models, can distinguish the temperature difference of 0.1 ° C or less;
5. Does not interfere with the measured temperature field. This is superior to instruments that are directly exposed to temperature measurement, such as thermocouples.
6. The temperature range is large. Depending on the model, the general camera can measure the range of 0 °C-2000 °C;
7. Safe to use. Due to the non-contact nature of the measurement, the camera is very safe to use. Due to its unique properties, it plays a huge role in many aspects such as military, industrial, medical and scientific research. Moreover, the structure of modern thermal imaging cameras is gradually becoming smaller and more intelligent, the performance is constantly improving, and the use is more flexible and convenient. Therefore, the application range of infrared thermal imaging technology will continue to expand, and its application level will also be continuously improved.
First, the power supply system detection
1, transformer testing,
The transformer box is heated due to blockage of the oil pipeline, eddy current loss, internal abnormality, poor core insulation, etc. The detection of the transformer box by the infrared camera can keep the transformer box at normal temperature and avoid the transformer being overheated. damage.
2, power quality testing
Due to the large-scale use of inverter air conditioners, it is easy to cause power quality problems and easily pose threats to other devices. 1) Overload: The load is too large, exceeding the rated load of the equipment itself. The phenomenon is that the current is too large, and the electrical equipment is heated. The long-term overload of the line will reduce the insulation level of the line and even burn the equipment or line. 2) Three-phase Balance: It means that the three-phase current (or voltage) amplitude is inconsistent in the power system, and the amplitude difference exceeds the specified range. Circulation (and overheating) occurs in the transformer and the efficiency of the motor is reduced.
3, electrical equipment contact failure detection
The so-called electrical equipment thermal defects usually refer to the heating phenomenon caused by internal or external causes. Depending on the cause of the defect, we usually fall into the following categories:
A component that has been exposed to air for a long period of time, due to the influence of temperature and humidity, or poor contact caused by surface fouling.
B. The damage caused by the external force, so that the conductive cross-sectional area is reduced and the heat is generated. If the joint is not properly connected, the bolts and washers are not pressed or tightened.
C long-term operation of corrosion oxidation; corrosion caused by reactive gases and dust in the atmosphere; poor component materials, poor processing and installation process, resulting in conductor damage; mechanical vibration and other factors caused by the actual cross-section of the conductor is reduced.
D load current is unstable or exceeds the standard.
E Due to the internal fault of the appliance itself, the resistance caused by poor contact of the internal connecting parts is too large.
Second, air conditioning compressor and air conditioning pipeline testing
1) Oil generator set detection, when the oil machine is working, the bearing generates a large amount of heat due to high-speed running friction. The thermal imager can be used to detect the bearing working temperature and analyze the bearing lubrication and working condition.
2) Air conditioner compressor temperature detection
Due to abnormal internal friction caused by air-conditioning compressor (such as lack of oil or internal assembly interference), or leakage in the compressor, the compressor temperature is exceeded, so the operating temperature state of the compressor needs to be checked during air conditioning operation (compressor is normal) When working, the top temperature is higher).
3) Air conditioning pipe leakage
Pipes are usually used to transport steam, raw materials, products, etc. Usually, the insulation layer is wrapped in the pipe. The infrared thermal imager can easily check whether the insulation layer of the pipe is damaged or whether the connection of the pipe flange is There is a leak. Using infrared cameras to quickly locate problems, reducing maintenance and reducing maintenance are energy efficient!
Third, air conditioning outlet adjustment and energy saving detection
The thermal imager can be used to detect the building in order to reduce energy loss and save energy.
1) Missing or damaged insulation layer
2) Looking for damaged parts of the building
3) Find the water accumulation area
4) For roof and old building renovation
Building floor heating and air conditioning system testing
With the advent of summer, how to maintain efficient and continuous operation of air conditioners will bring challenges to every engineering maintenance personnel. Fluke thermal imaging cameras can find every hidden point or fault point in air conditioning operation in a timely, fast and accurate manner. And energy saving.
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