Water purifier with flow meter
A technology of flowmeter and water purifier, applied in the field of water purifier with flowmeter, can solve problems such as unfavorable resource utilization, excessive waste water, etc., and achieve the effect of prolonging life, prolonging service life and reducing the risk of clogging
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Embodiment 1
[0078] Example 1: Please refer to figure 1 . A mechanical double faucet is added to the waste water return system, and the pure water outlet of the first reverse osmosis filter element 11a is divided into two lines, one of which is directly connected to the drinking water end of the double faucet, and the third one-way valve 15c and high-pressure valve are sequentially added to the pipeline. Switch 16, the other is a pure water return branch R, which is used to return the purified water to the front end of the first reverse osmosis filter element 11a; the waste water outlet of the first reverse osmosis filter element 11a is divided into two routes, one of which is directly connected to the domestic water end of the double faucet connected, a flowmeter 19 is connected to the pipeline; the other is the waste water return line, the waste water can flow back to the booster pump 12 through the first restrictor valve 14a, and there is a branch on the waste water return line which is...
Embodiment 2
[0083] Example 2: Please refer to figure 2 . In this embodiment, on the basis of Embodiment 1, a pre-filter 17a is added at the front end of the booster pump 12. The type of the pre-filter 17a can be different forms of PP, different forms of activated carbon, ultrafiltration, nanofiltration and the above materials Composite filter elements, etc., the water outlet flow rate of the pre-filter element 17a is <8L / min.
[0084] The user opens the drinking water faucet (drinking water inlet 131 is connected to the outlet 133): the high pressure switch 16 detects a pressure change, starts the booster pump 12, and starts water production; After permeating the filter element 11a, it is divided into one path of pure water and one path of waste water. The pure water is discharged from the drinking water faucet for drinking, and the waste water flows back to the booster pump 12 through the first flow limiting valve 14a and mixes with the outlet water of the pre-filter element 17a and th...
Embodiment 3
[0088] Example 3: Please refer to image 3 . In this embodiment, on the basis of Embodiment 1, a rear filter element 17b is added to the pure water outlet pipe of the first reverse osmosis filter element 11a before the return branch, and the type of the rear filter element 17b can be activated carbon in different forms.
[0089] The user opens the drinking water faucet (drinking water inlet 131 is connected to the drain outlet 133): the high pressure switch 16 detects a pressure change, starts the booster pump 12, and starts water production; Water and waste water all the way, pure water is discharged from the drinking faucet for drinking after passing through the rear filter element 17b. Filtration to achieve zero discharge of waste water.
[0090] The user turns on the domestic faucet (the domestic water inlet 132 is connected to the drain port 133): the flowmeter 19 receives a signal and detects that the user opens the domestic faucet; the tap water enters the first rever...
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