来源：http://www.jnmcd.com 发布时间：2020-08-10 浏览：次
The centrifugal machine driven directly by brushless motor is driven by motor with rotor at high speed. In the past, the motor was DC motor with carbon brush. When the centrifuge was running, the carbon brush was worn, which brought sparks, noise and even vibration, and had a service life. At that time, the carbon brush should be replaced before running. What's more serious is the carbon dust pollution caused by the wear of carbon brush, which not only pollutes the centrifuge, but also pollutes the surrounding environment, which is not suitable for the health industry.
When the rotor rotates at high speed, the air friction generates heat, and the temperature of the rotor will rise, so will the temperature of the sample in the test tube. Due to the biological samples on the temperature. Generally, the temperature should be kept at 4 ℃. Without the intelligent technology of computer control, it is impossible to achieve such precision. Therefore, a refrigerator is used to cool the centrifugal chamber to cool the rotor and sample temperature. However, it is difficult to measure the actual temperature of the rotating rotor. Temperature sensors are embedded at the bottom of the centrifugal chamber close to the rotor to indirectly measure the rotor temperature at home and abroad. T compensation of blood type centrifuge is related to rotor type, speed and running time.
Performance of brushless motor centrifuge:
In the past, the typical form of simulation technology is to select operating parameters (such as speed, temperature and time) by knobs, and display data with the pointer of dial. Now using digital technology, the typical form of expression is friendly interface, keyboard operation, digital display, programmable operation of full computer control, its core is intelligent control, is realized by computer. All parameters required for centrifuge operation (such as speed, temperature, time, plus and minus speed gear, etc.) are input by keyboard operation and displayed in figures. Therefore, the error between selecting operation parameters and reading data is small. Its reading accuracy is controlled by human operation. And every operation should be like this, with poor repeatability. Although the digital display of some centrifuges (such as the value selected by the knob and the digital display) has been improved, the principle of value taking is still analog technology. Because of the programmable operation, a group of operating parameters can be coded into numbers, which can be accessed and used