RO (reverse osmosis) water purifier without pressure tank

Abstract

The invention discloses an RO (reverse osmosis) water purifier without a pressure tank. The RO water purifier without the pressure tank comprises an RO water producing module, wherein a water inlet, a pure water outlet and a wastewater outlet are formed in the RO water producing module. The RO water purifier is characterized by further comprising a water storage tank, a water shortage sensor and a pure water supply pipeline, a water pump is arranged on the pure water supply pipeline which is communicated with the water storage tank, and the water shortage sensor is arranged on the water storage tank or the pure water supply pipeline; the pure water outlet is communicated with the water storage tank, or the pure water outlet is connected to the pure water supply pipeline between the water pump and the water storage tank; the pure water supply pipeline is used for supplying water to users. The RO water purifier has the advantages of simple and reasonable structure, high water supply pressure, large water supply amount and the like.

Description

technical field [0001] The invention relates to a reverse osmosis pure water machine (small reverse osmosis pure water machine), in particular to a reverse osmosis pure water machine without pressure tank. Background technique [0002] see Figure 5 , is a structural schematic diagram of an existing small reverse osmosis pure water machine, including a reverse osmosis water production module 16 provided with a water inlet 15, a pure water output port 18 and a waste water output port 17, and the pure water output port 18 passes through a one-way valve 9 Connected with the pressure tank 20, the pure water output port 18 is also provided with a water pressure switch 8. The reverse osmosis water production module 16 includes a pretreatment filter element group connected in series behind the water inlet 15, a water inlet solenoid valve 4, a booster pump 5 and a reverse osmosis membrane filter element 6, and the reverse osmosis membrane filter element 6 is connected to the pure wa...

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Problems solved by technology

The pre-treatment filter element group includes a front PP cotton filter element 1, an activated carbon filter element 2 and a rear cotton filter element 3 connected in series; this small reverse osmosis pure water machine still has the following disadvantages: (1) relying on the pressure tank 20 (2) In addition, the pressure tank 20 has a pressure air bag 23 inside, which occupies a large space, so that the water storage capacity is reduced, and because the pressure tank 20 will bring pressure to the reverse osmosis water production module. Back pressure, therefore, the power of the booster pump 5 must be increased, which increases the cost; (3) After the pressure airbag 23 is used for a long time, it is easy to pollute the pure water in the pressure tank 20 or cause it to produce peculiar smell

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