Working efficiency and service life of cast copper electric heater

 　　The requirements of using environment for cast copper electric heater: if you want the working efficiency and service life of explosion-proof electric heater not to be affected, we should pay attention to the usual use environment. Cast iron electric heater should be used in normal environment. In daily use, explosion-proof electric heater has strict requirements for the use environment. In order to avoid affecting the working efficiency and service life of explosion-proof electric heater, the environmental requirements should be paid attention to.

　　The proportion of cast aluminum electric heater in the mechanical industry is relatively large. When installing the explosion-proof electric heater pump, the technical personnel found that when the explosion-proof electric heater works in a certain pipeline, the actual working state of the explosion-proof electric heater not only depends on the performance curve of the electric heater itself, but also depends on the performance curve of the electric heater itself In the research of the heater, it is found that the working voltage of the explosion-proof electric heater also depends on the characteristics of the whole pipeline of the explosion-proof electric heater.

　　 When purchasing explosion-proof electric heater, it is necessary to have more understanding of the specification of explosion-proof electric heater, so as to purchase safe and qualified products, and have better guarantee in reliability, and the reliability that can be achieved will be better. Therefore, how to choose the explosion-proof electric heater should be started according to the actual situation, and the advantages that can be brought are also very excellent.

　　 According to the specifications of explosion-proof heaters, manufacturers with more professional explosion-proof electric heating belts can provide better quality electric heaters, and their functions and uses will be more obvious. These are the links worthy of our more attention. Therefore, how to choose better is also an important part, and it will be reflected in cost performance.

　　 Of course, an electric heater that can heat, warm and keep warm the flowing or static solid-liquid gas medium is also very obvious. It can be used in explosion-proof occasions or household occasions to provide electric energy into heat energy. Moreover, it has better guarantee on the stability of use, and its advantages will be more obvious.

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Advantages of digital sensors

The development of digital sensor has gradually become a new favorite in the field of weighing technology, to adapt to the advantages of on-site ability. Now the cars are using sensors everywhere, so where are the advantages of digital sensors?

1. The digital sensor has strong anti-interference ability: it adopts integrated A / D conversion circuit, digital signal transmission and digital filtering technology. The signal transmission distance of the sensor is far, up to 1200m, with strong anti-interference ability, and the transmission distance of analog signal in digital sensor is extremely short.

At the same time, the sensor shell (elastomer) itself is a good shielding cover, only these two characteristics determine the advantages of its anti-interference ability, greatly improving the stability of the sensor.

2. Convenient for fault diagnosis: since the digital sensor has the functions of automatic acquisition, pre-processing, storage and memory, and has a unique mark, the status of each sensor can be checked respectively after multiple sensors are connected in parallel to facilitate fault diagnosis.

3. Good confidentiality, with anti cheating function: can effectively prevent remote control cheating, once found will automatically take error alarm, effectively ensure the security and accuracy of data.

Digital temperature sensor DS18B20

SMD NTC thermistor and lithium battery

Because of its long cycle life, small size, light weight and no pollution, lithium batteries are widely used in mobile phones, notebook computers, electric vehicles, street lamp backup power supply, small household appliances, etc. In lithium battery, thermistor with negative temperature coefficient (NTC) is usually installed. NTC thermistor can prevent the battery from charging at too high or too low temperature, so as to avoid lithium battery overheating and cause accidents.

The use of SMT NTC thermistor has the advantages of high assembly density, small volume and light weight. The volume and weight of SMT NTC thermistor are only about 1 / 10 of that of plug-in thermistor. With SMD NTC thermistor, the volume and weight of electronic products can be reduced by 40% ~ 60% and 60% ~ 80% respectively. The chip NTC thermistor has high reliability, strong anti vibration ability, low solder joint defect rate, good high frequency characteristics, reducing electromagnetic and radio frequency interference, easy to realize automation and improve production efficiency. As a result, the cost can be reduced by 30% ~ 50% and materials, energy, equipment, manpower and time can be saved.

The use of NTC thermistor has the following advantages:

1. Save production and processing time. The traditional manual welding is simplified and the production time is shortened.

2. Avoid the contact displacement of plug-in NTC thermistor. If the contact of NTC thermistor moves to or around the heating device, the detection temperature of power management IC will deviate greatly.

3. Avoid short circuit. When NTC thermistor is damaged or exposed copper when it is supplied or processed, it is easy to short-circuit connect with some devices on PCB board, thus damaging PCB board or cell, and even causing safety accidents.

4. Avoid displacement and fracture, reduce the probability of human damage. The use of chip type NTC thermistor can effectively prevent NTC thermistor from breaking when it is supplied or processed, and prevent the temperature detection error of power management IC.

 

SMD NTC thermistor 

T-type thermocouple index table

 T-type thermocouple is also known as copper-constantan thermocouple (copper/nickel-copper thermocouple, graduation number T, measuring range -200~+350℃), and it is also the best thermocouple for measuring low temperature and cheap metals. Its positive electrode (TP) is pure copper, and the negative electrode (TN) is a copper-nickel alloy, which is often constantan. It is commonly used with Ni-Cr-Constantan constantan EN, but not with iron-Constantan constantan JN. Although they are called constantan, the measuring temperature range of copper-copper-nickel thermocouples is -200~350℃.

T-type thermocouple

    T-type thermocouple has the advantages of good linearity, large thermoelectromotive force, high sensitivity, approximate linear temperature and good reproducibility, fast heat transfer, good stability and uniformity, and low price, especially at -200~0℃ Used in the temperature zone, the stability is better, the annual stability can be less than ±3μV, and can be used as a second-class standard for low temperature value transfer after low temperature verification. The positive electrode copper of the T-type thermocouple has poor oxidation resistance at high temperatures, so the upper limit of the operating temperature is limited.

    Since the thermoelectric characteristics of various types of thermocouples are different, it is best to use them within the range of their linear segments. At the same time, each type of thermocouple has the highest temperature limit used.

    The highest temperature corresponding to different specifications of T-type thermocouples (the thin thermocouple is easy to break, and the smaller the diameter of the thermocouple, the lower the temperature used):

T-type thermocouple index table

Type T thermocouple