I am car technician

Arrive summer air conditioning use of a lot of, drive a car to want to open air conditioning basically all the time by day, and the change of air conditioning filter element, it is air conditioning system maintains in the most basic one. The function of air conditioning filter element is known to all, is to filter the air into the car, so that we breathe fresh and clean air. Some people also say that we don't need filters to breathe outside, so why do air conditioners need filters to let us breathe? This is because the suction generated by the blower operation is relatively large, and the area of the air inlet is relatively large. As long as there is a little cotton wool and dust around the air inlet, it will be sucked in. In the car, the space is narrow, the air flow is poor, and the probability of dust being breathed into the body by us is relatively large. In other words, if you don't filter it, the air inside the car is probably worse than the air outside. ...

Brake pad is an important part of brake system. The main working principle of the brake is to use the brake pad and brake disc and tires and the ground friction, a huge friction to stop the car, after constant friction brake pad will wear thinner and thinner. How often are the brake pads changed? Theoretically speaking, the service life of the front brake pad is 20-40,000km, while the service life of the rear brake pad is 60-100,000km. But different drivers have different driving habits, so it depends on how worn the brake pads are. I suggest that, on average, the front brake pads should be checked every 30,000 km and the rear brake pads should be checked every 60,000 km to decide whether to replace the brake pads according to the professional scientific test results. Everyone knows that the brake pads must be replaced when they are worn out, but if they are not found in time to continue using the car, they will wear out the brake disc as well. The brake pads are fixed...