CN110342667A - A kind of water purifier and method reducing pure water TDS value - Google Patents

Abstract

The invention discloses a water purifier and a method for reducing the TDS value of pure water, comprising a raw water inlet, a first RO filter element and a composite filter element; the composite filter element has a pre-filter element on the outside and a second RO filter element inside; the raw water inlet is connected to a pressurized The water inlet of the pump, the booster pump is connected to the water inlet of the first RO filter element through the first water inlet solenoid valve, and connected to the water inlet of the second RO filter element through the second water inlet solenoid valve; The pure water end is connected to the water inlet end of the first RO filter element through the second check valve, and the concentrated water outlet of the second RO filter element communicates with the outlet of the pre-filter element. In the present invention, the pre-filter element and the second RO filter element are combined to form a composite filter element, so as to avoid problems such as excessive body size and sudden cost increase caused by adding an RO filter element, and use the pure water generated by the second RO filter element to replace the inside of the first RO filter element Concentrated water can solve the problem of ion diffusion, so that the TDS of pure water in the pure water end will not increase.

Description

A water purifier and method for reducing the TDS value of pure water

technical field

The invention belongs to the technical field of water purification equipment, in particular to a water purification machine and a method for reducing the TDS value of pure water.

Background technique

The traditional reverse osmosis water purifier, the water production capacity is usually 50 gallons per day, the water production capacity ranges from 400 gallons to 800 gallons, or even more than 1,000 gallons, which are generally called large-flux water purifiers. Large-flux water purifiers are improving At the same time as certain performance, it also brings new problems in terms of hygiene indicators and cost performance, resulting in the problem of "living in water".

At present, the flow channel of the reverse osmosis membrane filter element (RO filter element) is as follows: the raw water enters from one end of the filter element, the raw water is filtered from the outside to the inside, the filtered pure water goes out through the central tube, and the filtered concentrated water is outside the central tube. . Concentrated water on the concentrated water side of the reverse osmosis filter contains high concentrations of ions and organic matter, which can slowly diffuse to the pure water side. If the time is long enough, the concentrations on both sides can be balanced. If it diffuses overnight, the TDS value of the pure water in the pure water side will increase significantly. If there are many heavy metal ions in the raw water, the heavy metals in the pure water will also exceed the standard, and the water quality and taste will be greatly affected.

When the high-throughput water purifier is working, the TDS at the pure water end is in a normal state. When the user stops using it, the concentrated water at the water inlet end of the RO membrane will gradually diffuse to the pure water end, and the diffusion time will start to appear after more than 5 minutes. The water at the pure water end generally depends on the size of the membrane shell, and generally has about 500-1000ml, which leads to a high TDS value of the first glass of water after restarting work.

Contents of the invention

The object of the present invention is to provide a water purifier and a method for reducing the TDS value of pure water that can solve the problem of high TDS value of the first glass of water with large flux.

For this reason, the first technical solution of the present invention is: a kind of water purifier that reduces the TDS value of pure water, comprises the body and the water circuit board of built-in preset pipeline, and the water circuit board is provided with raw water inlet, pure water outlet and Concentrated water outlet; a booster pump, a first water inlet solenoid valve and a first RO filter element are installed on the water circuit board, the booster pump is connected to the water inlet end of the first RO filter element through the first water inlet solenoid valve, and the first The pure water end of the RO filter element is connected to the pure water outlet through the first check valve and the high pressure switch, and the concentrated water end of the first RO filter element is connected to the concentrated water outlet through the concentrated water solenoid valve;

It is characterized in that: a composite filter element is also installed on the waterway plate, the exterior of the composite filter element is a pre-filter element, the interior is a second RO filter element, and the two are separated by a spacer; the composite filter element is provided with an inlet of the pre-filter element , the pre-filter outlet, the second RO filter inlet, the second RO filter pure water outlet and the second RO filter concentrated water outlet, the second RO filter concentrated water outlet is connected to the pre-filter outlet; the raw water inlet passes through The pre-filter element outside the composite filter element is connected to the booster pump, the booster pump is connected to the inlet of the second RO filter element through the second water inlet solenoid valve, and the pure water outlet of the second RO filter element is connected to the first RO filter element through the second check valve The water inlet end; the fuselage is also provided with a control module, the control module controls the on-off of the first water inlet solenoid valve, the booster pump and the second water inlet solenoid valve.

Preferably, a third check valve is installed at the concentrated water outlet of the second RO filter element, and a flow-restricting hole is arranged at the concentrated water outlet of the second RO filter element.

Preferably, when the first water inlet solenoid valve is in working state, the water inlet end of the first RO filter element is connected to the raw water inlet; when the second water inlet solenoid valve is in the working state, the inlet of the second RO filter element is connected to the raw water inlet, The pure water outlet of the second RO filter element communicates with the water inlet end of the first RO filter element.

Preferably, the working states of the first water inlet solenoid valve and the second water inlet solenoid valve are mutually staggered, that is, when the first water inlet solenoid valve is in the working state, the second water inlet solenoid valve is in the non-working state, or the second water inlet solenoid valve is in the non-working state, or the second water inlet solenoid valve is in the non-working state. When the water inlet solenoid valve is in the working state, the first water inlet solenoid valve is in the non-working state.

Preferably, the composite filter element also includes a filter bottle, a filter bottle cover, a turntable, a pressure plate and an RO filter element cover, the pre-filter element is placed in the filter bottle, the pre-filter element is placed inside the isolation tube, and the second RO filter element is placed in the isolation tube , the spacer is matched with the cover of the RO filter element; the pressure plate is matched with the turntable and placed in the cover of the filter bottle.

Preferably, the pressure plate is provided with a multi-layer annular structure facing the side of the filter bottle, which is matched with the water inlet and outlet of the pre-filter element and the second RO filter element, and the other side of the pressure plate is provided with four through holes, and the turntable is provided with There are four water-through columns, and sealing gaskets are provided between the pressure plate and the turntable; the turntable can rotate relative to the pressure plate, and there are two states that the through holes of the pressure plate are connected to the water-through columns and disconnected during the rotation process.

The second technical solution of the present invention is: a method for reducing the TDS value of pure water. Using the above-mentioned water purifier, when the water is produced normally, the first water inlet solenoid valve is opened, and the first RO filter element produces water normally. At this time The second water inlet solenoid valve is closed; when the water production is stopped, the first water inlet solenoid valve is closed, the second water inlet solenoid valve is opened, the second RO filter element in the composite filter element produces water normally, and the pure water produced passes through the second water inlet solenoid valve. The check valve enters the water inlet end of the first RO filter element, so that the first RO filter element replaces the concentrated water in the filter element with pure water, and after the concentrated water is discharged, the booster pump and the second water inlet solenoid valve are turned off, and the second RO The concentrated water produced by the filter element is mixed with raw water before returning to the booster pump and entering the second RO filter element.

Due to the flow problem of the booster pump, when the first water inlet solenoid valve is closed and the second water inlet solenoid valve is opened, the working pressure is too high, so it is necessary to set a flow limiting hole or add a flow limiting valve. The size of the flow limiting hole depends on the increase. Depending on the flow rate of the pressure pump, the working pressure of the second RO filter element in the composite filter element is adjusted to the normal working range.

The present invention adds a small-capacity second RO filter element on the basis of the traditional large-flux water purifier, and forms a composite filter element with the pre-filter element and the second RO filter element, avoiding the increase of the RO filter element and causing the body to be too large, Sudden cost increases etc. After shutdown, use the pure water produced by the second RO filter element to replace the concentrated water in the first RO filter element, so that all the concentrated water end of the first RO filter element becomes pure water, which solves the problem of ion diffusion and makes the pure water end The TDS of pure water will not increase, and this method solves the problem of high TDS value of the first glass of water with large flux.

Description of drawings

Below in conjunction with accompanying drawing and embodiment of the present invention will be described in further detail

Fig. 1 is a structural principle diagram of the present invention;

Fig. 2 is the exploded view of parts of composite filter element of the present invention;

Fig. 3, Fig. 4 are the structural representations of composite filter element of the present invention;

Fig. 5 is A-A sectional view of Fig. 3;

Fig. 6 is the B-B sectional view of Fig. 4;

Fig. 7 is a schematic diagram of the inlet waterway of the pre-filter element in the composite filter element;

Fig. 8 is a schematic diagram of the outlet waterway of the pre-filter element in the composite filter element;

Fig. 9 is a schematic diagram of the inlet waterway of the second RO filter element in the composite filter element;

Fig. 10 is a schematic diagram of the outlet water circuit of the second RO filter element pure water in the composite filter element;

Fig. 11 is a schematic diagram of the concentrated water outlet waterway of the second RO filter element in the composite filter element;

Fig. 12 is a schematic structural view of the pressure plate in the composite filter element.

The marks in the figure are: raw water inlet 1, pre-filter element 2, booster pump 3, first water inlet solenoid valve 4, first RO filter element 5, second water inlet solenoid valve 6, second RO filter element 7, concentrated water solenoid valve Valve 8, first check valve 9, high pressure switch 10, pure water outlet 11, concentrated water outlet 13, second check valve 14, third check valve 15, filter bottle 16, filter bottle cap 17, turntable 18, Pressure plate 19, RO filter cover 20, spacer 21, sealing gasket 22, restrictor hole 23, ring structure 24, pre-filter inlet A1, pre-filter outlet A2, second RO filter inlet B1, second RO Filter element pure water outlet B2, second RO filter element concentrated water outlet B3.

Detailed ways

See attached picture. The water purifier described in this embodiment includes a fuselage and a waterway plate with built-in preset pipelines, the body and the waterway plate are fixed, and the waterway plate is provided with a raw water inlet 1, a pure water outlet 11 and a concentrated water outlet 13; A composite filter element, a booster pump 3, a first water inlet solenoid valve 4, a first RO filter element 5 and a second water inlet solenoid valve 6 are installed on the water circuit board, and the raw water inlet 1 is connected to the booster pump 3 through a composite filter element, increasing The pressure pump 3 is connected to the water inlet end of the first RO filter element 5 through the first water inlet solenoid valve 4, and the pure water end of the first RO filter element 5 is connected to the pure water outlet 11 through the first check valve 9 and the high pressure switch 10, The pure water outlet is connected to the water outlet, and the concentrated water end of the first RO filter element 5 is connected to the concentrated water outlet 13 through the concentrated water solenoid valve 8 .

The composite filter element includes a filter bottle 16, a filter bottle cover 17, a turntable 18, a pressure plate 19, an RO filter element cover 20, a pre-filter element 2, a spacer 21 and a second RO filter element 7, and the pre-filter element 2 is placed in the filter bottle 16 Inside, a spacer 21 is placed inside the pre-filter element 2, and the second RO filter element 7 is placed in the spacer 21, and the spacer 21 and the RO filter cover 20 are matched. The pressure plate 19 cooperates with the rotary plate 18 and is placed in the filter bottle cap 17. The pressure plate 19 is provided with a four-layer ring structure 24 facing the filter bottle to separate the space from the pre-filter element 2 and the second RO. The water inlet and outlet of the filter element 7 are matched, the other side of the pressure plate 19 is provided with four through holes, the turntable 18 is provided with four water columns, and a sealing gasket 22 is arranged between the pressure plate and the turntable; the turntable can be pressed against each other. The disc rotates. During the rotation process, there are two states that the through hole of the pressure plate is connected to the water column and disconnected. It is used to connect the waterway when the composite filter element is installed, and to prevent dripping when the composite filter element is disassembled.

The two filter elements inside the composite filter element have a total of five water inlets and outlets, which are the inlet A1 of the pre-filter element, the outlet A2 of the pre-filter element, the inlet B1 of the second RO filter element, the pure water outlet B2 of the second RO filter element and the second RO filter element Concentrated water outlet B3, pre-filter inlet A1 is connected to raw water inlet 1, pre-filter outlet A2 is connected to booster pump 3, booster pump 3 is connected to the second RO filter inlet B1 through the second water inlet solenoid valve 6, and the second RO The pure water outlet B2 of the filter element is connected to the water inlet end of the first RO filter element 5 through the second check valve 14; the concentrated water outlet B3 of the second RO filter element is connected with the outlet A2 of the pre-filter element, and the concentrated water of the second RO filter element A third check valve 15 is installed at the outlet B3 to prevent the water from the outlet A2 of the pre-filter element from flowing into the second RO filter element 7 to form water channeling; the final composite filter element has four water inlets and outlets to the outside, and the four through holes on the pressure plate connected respectively. At the same time, there is a flow limiting hole 23 at the through hole where the pressure plate communicates with the concentrated water outlet B3 of the second RO filter element. The size of the flow limiting hole matches the power of the booster pump, so that the working pressure of the second RO filter element can be adjusted to the normal working range. .

A control module is also provided in the fuselage, and the control module controls the on-off of the first water inlet solenoid valve 4 , the booster pump 3 and the second water inlet solenoid valve 6 . when working:

Open the outlet tap, the raw water enters from the raw water inlet 1, and performs primary filtration through the pre-filter element 2, and then enters the first RO filter element 5 through the booster pump 3 and the first water inlet solenoid valve 4, and the filtered water through the first RO filter element 5 The pure water flows out from the pure water outlet through the first check valve 9; at this time, the second water inlet solenoid valve 6 is in a closed state.

Close the outlet tap, the water pressure in the pipeline rises, the high pressure switch 10 takes off, and the control module closes the first water inlet solenoid valve 4 after receiving the shutdown signal, and at the same time opens the second water inlet solenoid valve 6, and the raw water is discharged from the pre-filter 2 The primary filter enters the second RO filter element 7 through the booster pump 3 and the second water inlet solenoid valve 6, and the pure water filtered by the second RO filter element 7 enters the inlet water of the first RO filter element 5 through the second check valve 14 At the end, use pure water to replace all the concentrated water in the first RO filter element 5, and discharge the concentrated water. After all the first RO filter element is pure water, turn off the booster pump 3 and the second water inlet solenoid valve 6.

Claims (7)

1. A water purifier for reducing the TDS value of pure water, comprising a fuselage and a waterway plate with a built-in preset pipeline, the waterway plate is provided with a raw water inlet, a pure water outlet and a concentrated water outlet; the waterway plate is equipped with The booster pump, the first water inlet solenoid valve and the first RO filter element, the booster pump is connected to the water inlet end of the first RO filter element through the first water inlet solenoid valve, and the pure water end of the first RO filter element passes through the first backstop The valve and high-pressure switch are connected to the pure water outlet, and the concentrated water end of the first RO filter element is connected to the concentrated water outlet through the concentrated water solenoid valve; It is characterized in that: a composite filter element is also installed on the waterway plate, the exterior of the composite filter element is a pre-filter element, the interior is a second RO filter element, and the two are separated by a spacer; the composite filter element is provided with an inlet of the pre-filter element , the pre-filter outlet, the second RO filter inlet, the second RO filter pure water outlet and the second RO filter concentrated water outlet, the second RO filter concentrated water outlet is connected to the pre-filter outlet; the raw water inlet passes through The pre-filter element outside the composite filter element is connected to the booster pump, the booster pump is connected to the inlet of the second RO filter element through the second water inlet solenoid valve, and the pure water outlet of the second RO filter element is connected to the first RO filter element through the second check valve The water inlet end; the fuselage is also provided with a control module, the control module controls the on-off of the first water inlet solenoid valve, the booster pump and the second water inlet solenoid valve. 2. A water purifier for reducing the TDS value of pure water as claimed in claim 1, wherein a third check valve is installed at the concentrated water outlet of the second RO filter element, and the concentrated water of the second RO filter element There is a restrictor hole at the outlet. 3. A water purifier for reducing the TDS value of pure water as claimed in claim 1, characterized in that: when the first water inlet solenoid valve is in working condition, the water inlet end of the first RO filter element is connected to the raw water inlet; When the second water inlet solenoid valve is in working state, the inlet of the second RO filter element is connected to the raw water inlet, and the pure water outlet of the second RO filter element is connected to the water inlet end of the first RO filter element. 4. A water purifier for reducing the TDS value of pure water as claimed in claim 1, characterized in that: the working states of the first water inlet solenoid valve and the second water inlet solenoid valve are staggered from each other, that is, the first inlet solenoid valve When the water solenoid valve is in the working state, the second water inlet solenoid valve is in the non-working state, or when the second water inlet solenoid valve is in the working state, the first water inlet solenoid valve is in the non-working state. 5. A kind of water purifier that reduces pure water TDS value as claimed in claim 1, is characterized in that: described composite filter element also comprises filter bottle, filter bottle cover, rotating disk, pressure plate and RO filter element cover, pre-filter element Put it in the filter bottle, place the spacer inside the pre-filter element, place the second RO filter element in the spacer tube, and match the spacer tube with the RO filter element cover; the pressure plate is matched with the turntable and placed in the filter bottle cap. 6. A water purifier for reducing the TDS value of pure water as claimed in claim 5, characterized in that: the pressure plate is provided with a multi-layer ring structure on the side facing the filter bottle, and is connected with the pre-filter element, the second RO The water inlet and outlet of the filter element are matched, four through holes are provided on the other side of the pressure plate, four water passage columns are provided on the turntable, and sealing gaskets are arranged between the pressure plate and the turntable; the turntable can rotate relative to the turntable, During the process, there are two states that the through hole of the pressure plate is connected with the water column and disconnected. 7. A method for reducing the TDS value of pure water, characterized in that: using the water purifier described in any one of claims 1 to 6, during normal water production, the first water inlet solenoid valve is opened, and the first RO filter element is normal For water production, the second water inlet solenoid valve is closed at this time; when the water production is stopped, the first water inlet solenoid valve is closed, the second water inlet solenoid valve is opened, and the second RO filter element in the composite filter element produces water normally, resulting in Pure water enters the water inlet end of the first RO filter element through the second check valve, so that the first RO filter element uses pure water to replace the concentrated water in the filter element, and after the concentrated water is discharged, the booster pump and the second water inlet solenoid valve are turned off. At the same time, the concentrated water produced by the second RO filter element is mixed with raw water before returning to the booster pump and entering the second RO filter element.