What kind of pump is used for the circulating pump of warm water tank for car washing?
Warm air water valve 1. Cooling water circulation path The size of cooling water: The thermostat can make cooling water have three circulation paths: small circulation, large circulation and mixed circulation. When the water temperature of the engine is lower than 76℃, the main valve of the thermostat is closed, and the cooling water channel from the cylinder head to the radiator is cut off. Cooling water flows out of the cylinder head water jacket, enters the water pump through the thermostat bypass valve and bypass pipe, and is pumped to the cylinder head water jacket by the water pump. Because the cooling water will not dissipate heat through the radiator, the engine temperature will rise rapidly. This cycle is called a small cycle. When the engine water temperature is higher than 86℃, the thermostat main valve is opened and the bypass valve is closed. All the cooling water enters the radiator from the main valve to dissipate heat, and the water temperature drops rapidly, and then it is pumped into the water jacket of the cylinder block by the water pump. This cycle is called the grand cycle. 3. Mixing cycle: When the water temperature is between 76℃ and 86℃, the main valve and bypass valve of the thermostat are partially opened. At this time, both large circulation and small circulation exist, and only a part of cooling water is dissipated by the radiator. Second, the working principle of wax constant temperature paraffin is solid at room temperature. When the water temperature is lower than 349K(76℃), the main valve is completely closed and the bypass valve is completely opened. The water from the cylinder head directly enters the water pump through the bypass pipe, so it is called small circulation. Because water only flows between the water pump and the water jacket, and does not pass through the radiator, the cooling intensity is weak. When the water temperature of the engine reaches above 349K(76℃), paraffin gradually turns into liquid, and its volume increases, forcing the rubber tube to contract, thus generating upward thrust on the lower conical surface of the center rod. Therefore, the central rod generates downward reverse thrust on the rubber tube and the inductor, overcomes the spring tension and makes the main valve gradually open, and the opening of the bypass valve gradually decreases.
What happens when the additional water pump leading to the heater water tank of Audi A4L breaks down? Will there be no warm air?
The auxiliary water pump leading to the warm air tank is broken, which will cause the water in the warm air tank to stop circulating, and the water temperature in the pipeline near the radiator will increase and the water temperature in other parts will decrease; Because the heat source of the warm air comes from the engine coolant, and the coolant can only circulate in the warm air box after the water pump works to generate pressure, resulting in the disappearance or lack of warm air. If the additional water pump of the heating water tank is broken, the heating system pipeline will not freeze, which will lead to the cracking of the heating pipeline. Water heating system Water heating system is mostly used in cars, trucks and buses with low heating requirements. Water heating and warm air system is mainly composed of heater, hot water regulating valve, blower and control panel.