CN217377496U

CN217377496U - Back washing device and large-flow barrelless water purification machine

Info

Publication number: CN217377496U
Application number: CN202220238426.0U
Authority: CN
Inventors: 吴广桐
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-09-06
Anticipated expiration: 2032-01-28

Abstract

The utility model belongs to the field of water purification machines, in particular to a backwashing device and a large-flow barrelless water purification machine, which comprises a pure water storage tank connected with an RO reverse osmosis tank in parallel, wherein a water inlet of the pure water storage tank is connected on a pipeline of a water outlet of the RO reverse osmosis tank through a second check valve and a tee pipe fitting; a water outlet of the pure water storage tank passes through the second flow controller and the third one-way valve in sequence and is connected to a pipeline of a water inlet of the RO reverse osmosis tank through a three-way pipe fitting; the flow rate of the second flow controller is far smaller than that of the first flow controller. The utility model discloses based on current water purification machine, install additional or change a jar of crossing as the pure water holding vessel back flush to RO reverse osmosis jar, under the condition that does not increase the water purification machine volume, solved the interior dialysis phenomenon of RO reverse osmosis jar, in time go out water need not to wait when having realized the water purification machine and start, and the purpose that quality of water can be up to standard directly drink.

Description

Back washing device and large-flow barrel-free water purifier

Technical Field

The utility model belongs to the field of water purification machines, in particular to a back washing device and a large-flow barrel-free water purification machine.

Background

At present, the water purifier technology is mature, a large-flow barrel-free water purifier is mainly used from an early small-flow water storage barrel to the present, but after the large-flow water purifier is shut down, because two sides of an RO membrane of an RO reverse osmosis tank are respectively provided with pure water and concentrated water, concentration difference exists, and a dialysis phenomenon can occur until the concentrations of two sides of the RO reverse osmosis membrane are the same. Therefore, when the water purifier is started next time, the TDS value of the effluent in about the first 1 minute is higher. In order to solve the problem in the prior art, one way is to discharge concentrated water after the water purifier is shut down, but the water needs to wait for about 1 minute before the water purifier is started next time; the other mode is that an air bag type pressure water storage barrel is additionally arranged on the water outlet side of the RO reverse osmosis membrane, after the water purification machine is shut down, the RO reverse osmosis tank is backwashed by pure water in the air bag type pressure water storage barrel, and the RO reverse osmosis tank is filled with the pure water, so that the water is timely discharged when the water purification machine is started, and the water quality reaches the standard.

The water purification machine needs to be additionally provided with the air bag type pressure water storage barrel for realizing the back washing of the RO reverse osmosis tank, the cost of the water purification machine is increased, and the air bag type pressure water storage barrel needs to occupy additional space. Meanwhile, the air bag type pressure water storage barrel is inconvenient to use and easy to damage, and the use cost is further increased. The air bag type pressure water storage barrel is provided with pressure by the air bag, but the pressure is small and large and is not easy to control. The flushing water quantity provided by the air bag type pressure water storage barrel is not easy to control, so that excessive flushing is caused, and water resources are wasted.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a back flush device and large-traffic barrelless water purification machine to current water purification machine is the basis, installs additional or changes a leading filtration jar as the pure water storage tank and carries out the back flush to RO reverse osmosis jar.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a backwashing device comprises a pure water storage tank connected with an RO reverse osmosis tank in parallel, wherein a water inlet of the pure water storage tank passes through a second one-way valve and is connected to a pipeline of a water outlet of the RO reverse osmosis tank through a three-way pipe; a water outlet of the pure water storage tank passes through the second flow controller and the third one-way valve in sequence and is connected to a pipeline of a water inlet of the RO reverse osmosis tank through a three-way pipe fitting; the flow rate of the second flow controller is far smaller than that of the first flow controller.

Further, the flow ratio of the second flow controller to the first flow controller is 1: 11.

further, the maximum pressure of the back washing device is set to be 2.5 atmospheric pressures.

Furthermore, a small ultrafiltration membrane is arranged at a water outlet of the pure water storage tank.

Further, the large-flow barrelless water purifier comprises a PP cotton filter tank, a low-pressure switch, a preposed carbon filter tank, a water inlet electromagnetic valve, a booster pump, an RO reverse osmosis tank, a first one-way valve, a high-pressure switch and a postposition carbon filter tank which are sequentially connected through pipelines, wherein a water inlet of the PP cotton filter tank is connected with a tap water pipeline, a water outlet of the postposition carbon filter tank is connected with a water tap, and a water outlet of the RO reverse osmosis tank is connected with a sewer pipe through a first flow controller; the system also comprises a pure water storage tank connected with the RO reverse osmosis tank in parallel, wherein a water inlet of the pure water storage tank passes through a second one-way valve and is connected to a pipeline of a water outlet of the RO reverse osmosis tank through a three-way pipe fitting; a water outlet of the pure water storage tank sequentially passes through a second flow controller and a third one-way valve and is connected to a pipeline of a water inlet of the RO reverse osmosis tank through a three-way pipe fitting; the flow rate of the second flow controller is far smaller than that of the first flow controller.

Further, the pressure value of the high-voltage switch is set to be 2.5 atmospheric pressures.

The utility model discloses based on current water purification machine, install additional or change a jar of crossing as the pure water holding vessel back flush to RO reverse osmosis jar, under the condition that does not increase the water purification machine volume, solved the interior dialysis phenomenon of RO reverse osmosis jar, in time go out water need not to wait when having realized the water purification machine and start, and the purpose that quality of water can be up to standard directly drink. Meanwhile, the RO reverse osmosis membrane is soaked by pure water, so that the service lives of the RO reverse osmosis membrane and the rear carbon core can be effectively prolonged. Compared with the existing water purification machine additionally provided with the air bag type pressure water storage barrel, the utility model has the advantages of low cost, small occupied space, easy control of the pure water amount for washing, water saving and low maintenance cost.

Drawings

FIG. 1: the utility model discloses the schematic structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

The preposed filter tanks of the existing water purification machine are generally three or more, and the last filter tank is a PP cotton filter tank. The tap water is filtered by the front PP cotton filter tank 1, the front carbon filter tank 2 and/or other filter tanks, the impurities in the tap water are basically filtered, and the function of the last PP cotton filter tank is not large. On the basis, the last PP cotton filter tank is changed or a filter tank is additionally arranged after the last PP cotton filter tank, and the filter core is removed, so that only the filter tank body is reserved as a pure water storage tank for backwashing the RO reverse osmosis tank.

In the present embodiment, as shown in fig. 1, three pre-positioned filter tanks are taken as an example, and in the present embodiment, tap water is connected to the water inlet 11 of the PP cotton filter tank 1 through a pipeline, and the water outlet 12 of the PP cotton filter tank 1 is connected to the water inlet 21 of the pre-positioned carbon filter tank 2 through the low-pressure switch 5. The water outlet of the preposed carbon filter tank 2 is connected with the water inlet 81 of the RO reverse osmosis tank 8 through the water inlet electromagnetic valve 6 and the booster pump 7 in sequence. The water outlet 82 of the RO reverse osmosis tank 8 is connected with the water inlet 41 of the post-carbon filter tank 4 through the first check valve 9 and the high-voltage switch 10 in sequence, and the water outlet 42 of the post-carbon filter tank 4 is connected with the water tap 15. The drain 83 of the RO reverse osmosis tank 8 is connected to the downcomer through the 1100cc/min first flow controller 17.

A back flushing device is connected in parallel between the point A on the pipeline between the booster pump 7 and the water inlet 81 of the RO reverse osmosis tank 8 and the point B on the pipeline between the water outlet 82 of the RO reverse osmosis tank 8 and the first check valve 9. The last PP cotton filter tank arranged in front or a filter tank arranged behind the last PP cotton filter tank is removed, and only the filter tank body is reserved as a pure water storage tank 3 for backwashing the RO reverse osmosis tank 8. The water inlet 31 of the pure water storage tank 3 passes through the second check valve 16 and is connected to a point B on the pipeline between the water outlet 82 of the RO reverse osmosis tank 8 and the first check valve 9 by a tee pipe fitting. The water outlet 32 of the pure water storage tank 3 passes through the second flow controller 13 and the third check valve 14 in sequence and is connected to a point a on a pipeline between the booster pump 7 and the water inlet 81 of the RO reverse osmosis tank 8 through a tee pipe fitting. A small ultrafiltration membrane 33 is installed at the water outlet 32 of the pure water storage tank 3 to prevent the RO reverse osmosis tank 8 from being contaminated by bacteria growing therein.

The pure water storage tank 3 is filled with air, and after the water tap 15 is closed, the pure water machine continues to work to make water, and the water flows into the pure water storage tank 3 from the point B of the tee joint through the second one-way valve 16. Since the pressure of the outlet water of the pressurizing pump 7 is higher (generally 6 atmospheres) than the pressure in the pure water storage tank 3, the pure water and the air in the pure water storage tank 3 do not flow to the point a through the third check valve 14. When the air in the pure water storage tank 3 is compressed to 2.5 atmospheric pressures by water, the water pressure in the pipeline at the rear end of the water outlet 82 of the RO reverse osmosis tank 8 is also 2.5 atmospheric pressures, and reaches the set value of the high-pressure switch, and the pure water machine stops working. The RO reverse osmosis tank 8 of this example has a volume of 1400ml for the 3013RO membrane shell which is the most common on the market, and a volume of 1000ml for the filtration tank as the pure water storage tank 3. Through tests, when the air pressure of the pure water storage tank 3 is 2.5 atmospheres, the volume of the gas is reduced by 60 percent, namely 60 percent of pure water in the pure water storage tank 3 is pure water, and the water quantity at the moment can meet the requirement of the water quantity for the back washing of the RO reverse osmosis tank 8. Compared with a water purifier additionally provided with an air bag type pressure water storage barrel, the control of the pure water quantity for flushing is easier and more accurate, and water can be saved.

When the water purifier stops working, the pressure in the RO reverse osmosis tank 8 is released through the waste discharge port 83, and at this time, the pressure of the compressed air in the pure water storage tank 3 is also released, so that the pure water in the pure water storage tank 3 is pressed into the RO reverse osmosis tank 8 through the second flow controller 13 and the third check valve 14 of 100cc/min, the RO reverse osmosis tank 8 is backwashed, and finally the RO reverse osmosis tank 8 is filled. When the pressure in the pure water storage tank 3 is gradually reduced, the water pressure in the pipeline at the rear end of the water outlet 82 of the RO reverse osmosis tank 8 is larger than the pressure in the pure water storage tank 3, and the pure water in the pipeline at the rear end of the water outlet 82 of the RO reverse osmosis tank 8 flows into the pure water storage tank 3 under the action of the pressure, so that the pure water in the pure water storage tank 3 can continuously flow to the RO reverse osmosis tank 8.

A second flow controller 13 of 100cc/min is arranged on the water outlet pipeline of the pure water storage tank 3, so that the pure water in the pure water storage tank 3 slowly flows into the RO reverse osmosis tank 8 for flushing. If the second flow controller 13 is too large, the pure water in the pure water storage tank 3 rapidly flows into the RO reverse osmosis tank 8 and is discharged, and the RO reverse osmosis tank 8 cannot be flushed clean. Therefore, the flow rate of the second flow controller 13 is much smaller than that of the first flow controller 17.

The utility model discloses a back washing unit also can externally be transformed current water purification machine by external mode, connect in parallel between A, B two points of existing water purification machine RO reverse osmosis jar 8 through the tee bend pipe fitting.

Claims

1. A back washing device is characterized in that: the system comprises a pure water storage tank (3) connected with an RO reverse osmosis tank (8) in parallel, wherein a water inlet (31) of the pure water storage tank (3) passes through a second one-way valve (16) and is connected to a pipeline of a water outlet (82) of the RO reverse osmosis tank (8) through a three-way pipe; a water outlet (32) of the pure water storage tank (3) sequentially passes through a second flow controller (13) and a third one-way valve (14) and is connected to a pipeline of a water inlet (81) of the RO reverse osmosis tank (8) through a three-way pipe fitting; the flow rate of the second flow controller (13) is far smaller than that of the first flow controller (17).

2. A backwash device as defined in claim 1, wherein: the flow ratio of the second flow controller (13) to the first flow controller (17) is 1: 11.

3. a backwash device as defined in claim 1, wherein: the maximum pressure of the back washing device is set to be 2.5 atmospheric pressures.

4. A backwash device as defined in claim 1, wherein: and a small ultrafiltration membrane (33) is arranged at a water outlet (32) of the pure water storage tank (3).

5. A large-flow barrelless water purifier adopting the backwashing device of any one of claims 1 to 4 comprises a PP cotton filtering tank (1), a low-pressure switch (5), a front carbon filtering tank (2), a water inlet electromagnetic valve (6), a booster pump (7), an RO reverse osmosis tank (8), a first one-way valve (9), a high-pressure switch (10) and a rear carbon filtering tank (4) which are sequentially connected through a pipeline, wherein a water inlet (11) of the PP cotton filtering tank (1) is connected with a tap water pipeline, a water outlet (42) of the rear carbon filtering tank (4) is connected with a water tap (15), and a water outlet (83) of the RO reverse osmosis tank (8) is connected with a sewer pipe through a first flow controller (17); the method is characterized in that: the RO reverse osmosis water purifier also comprises a pure water storage tank (3) connected with the RO reverse osmosis tank (8) in parallel, wherein a water inlet (31) of the pure water storage tank (3) passes through a second one-way valve (16) and is connected to a pipeline of a water outlet (82) of the RO reverse osmosis tank (8) through a three-way pipe; a water outlet (32) of the pure water storage tank (3) sequentially passes through a second flow controller (13) and a third one-way valve (14) and is connected to a pipeline of a water inlet (81) of the RO reverse osmosis tank (8) through a three-way pipe fitting; the flow rate of the second flow controller (13) is far smaller than that of the first flow controller (17).

6. The high flow barrelless water purifier of claim 5, wherein: the pressure value of the high-voltage switch (10) is set to be 2.5 atmospheric pressures.