What is the working principle of watering can?

1. The first is the pressure difference. The pressure of water in the kettle+the pressure of internal air >; The pressure of the atmosphere outside, so the water will flow out.

2. Relationship between velocity and cross-sectional area. If there is no empty space in the kettle, just pour out the water (similar to pouring water into a teacup), and the effect is not like that.

According to the same source, the flow per unit time is equal.

The smaller the hole of the kettle, the higher the flow rate. (flow x circulation area = flow, the smaller the circulation area, the higher the flow. )

It uses a push pump to push the gas into the bottle (the air inlet can only suck in the air, but it is a one-way membrane), so the pressure of the gas in the bottle will increase, so as long as the water nozzle is opened, the water will be squeezed out of the bottle by the atmosphere in the bottle. The greater the pressure, the farther you spray!