The three-way valve has three entrances and exits connected with the pipeline, which is equivalent to the integration of two single-seat valves. According to the function, it is divided into confluence valve (two-in-one pass) and diverter valve (one-in-two pass). When working, all the way is fully open and all the way is fully closed, so the force when closing is similar to that of a single-seat valve, and the unbalanced force is large. The three-way valve core, like the sleeve of the sleeve valve, has two kinds of intercepting areas (injection type): opening a large window and punching a small hole. The latter has the function of reducing noise and vibration.
Dismantling method of warm air water tank: unscrew the drainage plastic screws under the water supply tank, and the water will flow out. Pay attention to the rubber ring on the plastic screw when loosening it! When the water tank is empty, it will close. When the water tank is emptied, start the car, run at idle speed and turn on the warm air for 20-30 seconds. In this way, the residual water in the heating pipe and cylinder can be pumped out by the water pump, and it can be basically disassembled at this time.