CN201864606U - Reverse osmosis water purifier without waste water - Google Patents

Abstract

The utility model discloses a reverse osmosis water purifier without waste water, which comprises a preprocessor and a deep processor arranged in series in the water inlet pipeline, and the water treated by the preprocessor flows into the deep processor, wherein the deep processor is A closed container, divided into pure water area and concentrated water area by reverse osmosis membrane, pure water flows out from the pure water outlet, and also includes an energy storage tank for collecting concentrated water generated during the operation of the deep processor, the outlet of the energy storage tank The water outlet is connected to the water pipe directly connected to the water inlet of the water purifier through the drainage pipeline, and the water outlet of the energy storage tank is connected with the water inlet pipeline of the deep processor through the return pipeline. The utility model achieves the purpose of saving water and prolonging the working life of the filter core of the preprocessor by setting the device for collecting and recycling the discharged concentrated water and avoiding the flushing program of the specially designed reverse osmosis membrane.

Description

Wastewater-free reverse osmosis water purifier

technical field

The utility model relates to a water purifier, in particular to a reverse osmosis water purifier for daily use without waste water.

Background technique

As shown in Figure 1, the daily reverse osmosis water purifier in the prior art comprises a pretreatment system and a deep treatment system, and the pretreatment system is made up of several preprocessors 2' that filter elements are housed, between the preprocessors The water inlet of the first preprocessor is connected to the source water through the pipeline 1'; the deep treatment system is composed of a deep processor containing a reverse osmosis membrane, which is a closed container, and the reverse osmosis membrane will The deep processor is divided into a pure water area 5' and a concentrated water area 6'. The pure water area is connected with an outlet pipe 7' for taking pure water. The concentrated water area is equipped with a water inlet and a water outlet; It is connected with the water inlet of the concentrated water area of the deep processor through a pipeline, and a booster pump 4' for pressurizing the water inlet of the deep processor is connected in series in the pipeline.

The outlet of the concentrated water area of the deep processor is connected to the waste water ratio (throttle device) 8' used to control the pressure of the concentrated water area. The waste water ratio 8' maintains the pressure of the concentrated water area of the deep processor on the one hand to ensure that the water flow The reverse osmosis membrane has sufficient water flow power, and on the other hand, a certain amount of concentrated water is discharged so that the booster pump 4' can replenish a sufficient amount of new water. The replenished water can not only keep the impurity concentration of the water in the concentrated water area from being too high, And it can form a larger tangential flow velocity on the concentrated water side of the reverse osmosis membrane. The larger tangential flow velocity can not only reduce the tendency of impurities in the water to deposit on the membrane surface, but also reduce the impurities attached to the reverse osmosis membrane ( Such as ions, particulate matter, organic matter, etc.), which can prolong the service life of the reverse osmosis membrane to a certain extent.

In the water inlet pipeline at the front end of the booster pump 4', a water inlet solenoid valve 3' is set. When the water production is completed and the booster pump stops, the source water from the water supply pipe 1' will pass through the booster pump under the action of water pressure. Flowing to the drain pipe causes waste of water resources, and closing the water inlet solenoid valve after the water production is completed can avoid this unnecessary waste.

The water outlet of the concentrated water area of the deep processor is also connected with a bypass water pipe in parallel with the waste water ratio, and the water in the bypass water pipe is controlled by the flushing solenoid valve 9', which is used to discharge the water specially flushing the reverse osmosis membrane. When the flushing solenoid valve 9' is turned on, both the booster pump 4' and the water inlet solenoid valve 3' are turned on. At this time, the tangential flow velocity on the concentrated water side of the reverse osmosis membrane is very large, and the concentrated water in the flushing process passes through the flushing process. Controlled evacuation by solenoid valve 9'.

The disadvantage of the reverse osmosis water purifier structure in the above-mentioned prior art is that the concentrated water discharged through the waste water ratio has been filtered by the pretreatment system. Although its impurity content is quite different from that of pure water, its water quality is still higher than or It is equivalent to ordinary tap water (mainly because the concentration of minerals is higher than that of tap water), and here it can only be discharged in the form of waste water, causing huge waste. Normally, 3 cubic meters of concentrated water will be drained for every cubic meter of pure water produced; in addition, this structure also requires an independent reverse osmosis membrane flushing program, and the water used in the flushing process will also be used as waste water through the flushing solenoid valve control Draining, while wasting water, also increased the workload of the preprocessor, affecting the working life of the filter element in the preprocessor.

Utility model content

The utility model aims at overcoming the defects in the above-mentioned prior art, by setting up a collection and recycling device for the discharged concentrated water and avoiding the flushing program of the specially designed reverse osmosis membrane, so as to save water and prolong the working life of the preprocessor filter element .

The non-wastewater reverse osmosis water purifier of the utility model includes a preprocessor and a deep processor arranged in series in the water inlet pipeline, and the water treated by the preprocessor flows into the deep processor, wherein the deep processor is a closed container , divided into pure water area and concentrated water area by reverse osmosis membrane, pure water flows out from the pure water outlet, and also includes an energy storage tank for collecting concentrated water generated during the operation of the deep processor, and the water outlet of the energy storage tank is drained The pipeline is connected to the water pipe directly connected to the water inlet of the water purifier, and the water outlet of the energy storage tank is connected to the water inlet pipeline of the deep processor through the return pipeline. The collection and recycling of concentrated water can be realized by adding energy storage tanks, drainage pipelines and return pipelines, which can save water and effectively prolong the working life of preprocessor filter elements.

Wherein, the energy storage tank is provided with a water chamber and an air chamber, and a diaphragm is provided between the air chamber and the water chamber. The gas stored in the air chamber is compressed by the concentrated water flowing into the water chamber to store energy. Preferably, the energy storage The tanks are respectively provided with mutually independent water inlets and water outlets. Through the pressure in the energy storage tank, the collected concentrated water can smoothly enter the drainage pipeline or the return pipeline.

The water outlet of the energy storage tank is connected to the water pipe directly connected to the water inlet of the water purifier through a drainage pipeline, which includes two situations: one, the water outlet of the energy storage tank is connected to the water pipe connected to the water purifier through a drainage pipeline. The water inlet is directly connected to the water inlet pipe of the water purifier. At this time, there is only one water pipe connected between the water purifier and the water source pipe. This water pipe is both the water inlet pipe of the water purifier and the concentrated water drain pipe of the water purifier. The position of the water pipe is relatively close to the position of the water purifier; secondly, the water outlet of the energy storage tank is connected to the water source pipe directly connected to the water inlet of the water purifier through the drainage pipeline. At this time, the water purifier and the water source pipe There are two water pipes connected, one is the water inlet pipe of the water purifier, and the other is the concentrated water drain pipe of the water purifier, which is suitable for the occasion where the water source pipe is relatively far from the water purifier.

Preferably, a first electric control valve can be arranged on the drainage pipeline. The first electric control valve is used to control the switching between the water production process and the drainage process, wherein the water production process includes the process of prefabricating water in which the pressure in the energy storage tank gradually rises from a low pressure state to a high pressure state, and the pressure in the energy storage tank is at The official water production process under high pressure, the prefabricated water process is actually the flushing process of the reverse osmosis membrane.

The electric control valve refers to a valve that can be opened and closed by electric control, such as a solenoid valve, an electric valve, and the like.

Preferably, when the water pressure in the source water pipe is low enough to overcome the resistance of the reverse osmosis membrane, a first booster pump can be set on the water inlet pipeline of the deep processor; a throttling device is set on the return pipeline to throttle The outlet port of the device communicates with the inlet pipeline of the first booster pump. It is preferred to use waste water than this throttling device.

Preferably, when the water pressure in the source water pipe is low enough to overcome the resistance of the reverse osmosis membrane, a first booster pump is set on the water inlet pipeline of the deep processor; a second booster pump is set on the return pipeline, and the second booster pump is The outlet pipeline of the second booster pump communicates with the outlet pipeline of the first booster pump. The use of the second booster pump can further increase the tangential flow of water flowing through the concentrated water side of the reverse osmosis membrane, and can make the flow more stable.

Preferably, when the water pressure in the source water pipe is high enough to overcome the resistance of the reverse osmosis membrane, a second booster pump is arranged on the return line (this solution does not need to be used in the water inlet line due to the high water pressure of the source water pipe) first booster pump).

Preferably, when the water pressure in the source water pipe is high enough to overcome the resistance of the reverse osmosis membrane, a second booster pump is provided on the return pipeline; Pressure detection device. The pressure detecting device may be a pressure switch or a pressure sensor. The pressure switch is an electrical switch controlled by water pressure. The function of the pressure detection device is: when it detects that the pressure in the pipeline is low, the control system of the water purifier will open the first electric control valve on the drainage pipeline, so that the concentrated water in the energy storage tank will be discharged through the drainage pipeline. To the source water pipe.

Preferably, a first one-way valve can be set on the drain pipeline. The first one-way valve can make the concentrated water flowing out from the water outlet of the energy storage tank flow in one direction along the drainage pipeline.

Preferably, a second one-way valve can be arranged on the water inlet pipeline. The second one-way valve can make the source water flow in one direction along the water inlet pipeline.

Preferably, on the pure water outlet pipeline of the deep processor or on the water inlet pipeline of the deep processor, when the water purifier does not produce water, the second water tank that can prevent the pressure of the concentrated water area in the deep processor from continuing to be greater than the pressure of the pure water area is set. Electronically controlled valves to prevent "dead filtration" of the reverse osmosis membrane and affect the service life of the reverse osmosis membrane.

When the water purifier needs to produce water, the first electric control valve on the drainage pipeline is closed. The source water is pretreated by the preprocessor and then flows into the deep processor. The water flowing out of the pure water outlet of the deep processor is Pure water, the concentrated water flowing out from the concentrated water outlet of the deep processor flows into the water cavity of the energy storage tank, and the concentrated water flowing out of the water cavity of the energy storage tank flows back to the water inlet pipeline of the deep processor through the return pipe, the water production process Just like this; when the water purifier needs to flush the reverse osmosis membrane or when the water production process is over, open the first electric control valve on the drainage pipeline, so that the concentrated water in the energy storage tank flows to the water source pipeline, and the other on the water source pipeline When the water appliance (such as a faucet) is turned on, the concentrated water flows to the water appliance, so that the concentrated water can be utilized, avoiding waste caused by direct discharge.

For the embodiment provided with the first booster pump, the flushing of the reverse osmosis membrane can also be realized by turning on the first booster pump and the first electric control valve.

Compared with the prior art, the utility model has the following beneficial effects:

1. The water purifier of the present utility model does not produce discharged waste water, which not only saves water resources, but also avoids the installation of waste water discharge pipes;

2. The water purifier of the present utility model does not need a separate flushing reverse osmosis membrane program in the prior art, but only needs to realize the reverse osmosis membrane by making the water flow through the reverse osmosis membrane surface larger tangential flow velocity at the beginning of each water production. flushing of permeable membranes;

3. It can effectively prolong the service life of the pretreatment filter element.

Description of drawings

Fig. 1 is the structural connection schematic diagram of reverse osmosis membrane water purifier in the prior art;

Fig. 2 is the structural connection diagram of Example 1 of the utility model without waste water reverse osmosis water purifier;

Fig. 3 is the structural connection diagram of embodiment 2 of the reverse osmosis water purifier without waste water of the present invention;

Fig. 4 is the structural connection schematic diagram of embodiment 3 of the utility model without waste water reverse osmosis water purifier;

Fig. 5 is a structural connection schematic diagram of embodiment 4 of the utility model without waste water reverse osmosis water purifier;

Fig. 6 is a structural connection schematic diagram of Embodiment 5 of the utility model of the non-wastewater reverse osmosis water purifier.

In conjunction with the accompanying drawings, the following reference numerals are marked thereon:

1'-water supply pipe, 2'-preprocessor, 3'-inlet solenoid valve, 4'-booster pump, 5'-pure water area, 6'-concentrated water area, 7'-clean water outlet pipe, 8'-wastewater ratio, 9'-flushing solenoid valve.

1-water supply pipe, 2-preprocessor, 3-faucet, 4-first booster pump, 5-pure water area, 6-concentrated water area, 7-clean water outlet pipe, 8-wastewater ratio, 9-storage Energy tank, 10-water storage chamber, 11-air chamber, 12-first electric control valve, 13-first one-way valve, 14-second booster pump, 15-pressure switch, 16-second electric control valve , 17-the second one-way valve.

Detailed ways

Several specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.

Example 1

As shown in Figure 2, the parts of the reverse osmosis water purifier without waste water of embodiment 1 can be connected in the following manner:

A water supply pipe 1 is connected to the source water pipe (with running water inside), and the water supply pipe 1 is connected in series with the preprocessor 2, the low pressure switch, the first booster pump 4 and the deep processor in series to form a water inlet channel, and the low pressure switch can prevent The water pump is dry without water and damages the water pump. Wherein the preprocessor 2 is composed of three pretreatment filter elements connected in series with each other. The deep processor is equipped with a reverse osmosis membrane module. The reverse osmosis membrane divides the deep processor into a pure water area 5 and a concentrated water area 6. The pure water area 5 is connected with the pure water outlet pipe for obtaining pure water. The inlet of the concentrated water area 6 is connected with the outlet of the first booster pump 4, and the outlet of the concentrated water area 6 is connected with the water cavity of the energy storage tank 9, and the energy storage tank 9 is used to collect and store the water discharged from the deep processor. Concentrated water, the energy storage tank is provided with a water chamber 10 and an air chamber 11, and a diaphragm is provided between the air chamber and the water chamber to prevent the gas from dissolving into the water and being discharged with the water flow to reduce the gas storage in the air chamber. In addition, the water chamber 10 is connected in series with the first electric control valve 12 and the first one-way valve 13 in sequence through the connecting pipeline, and finally connected to the water supply pipe 1 to form a drainage pipeline. The first one-way valve 13 can prevent the source water from being reversed. To directly flow into the energy storage tank 9, the air pressure stored in the above-mentioned air chamber can provide energy for the concentrated water in the water chamber 10 of the energy storage tank 9 to flow to the water supply pipe 1, and the water outlet of the water chamber 10 and the first electric control valve 12 A return pipe is drawn on the pipeline between to the inlet pipeline of the first booster pump 4, and a waste water ratio of 8 (a kind of throttling device) is established on the return pipe.

The working process of embodiment 1 is as follows:

The first electric control valve 12 can be a normally open electric control valve. When there is water in the source water pipe, the low pressure switch is in a closed state under the action of water pressure. The power circuit of the pump 4 and the circuit of the first electric control valve 12, so the first booster pump 4 is energized and started, and the first electric control valve 12 is closed; the water from the source water pipe passes through three pretreatment filter elements (i.e. pretreatment After pretreatment by the first booster pump, it enters the reverse osmosis filter element (i.e. deep processor) for advanced treatment; the water flowing out from the outlet of the reverse osmosis filter element (i.e. the outlet of pure water zone 5) is pure Water; the water discharged from the concentrated water outlet of the reverse osmosis filter element (i.e. the concentrated water area 6 outlet) flows into the water cavity 10 of the energy storage tank 9, and then flows back to the water inlet of the first booster pump 4 after the waste water is decompressed at a ratio of 8 , so as to be recycled again.

When the water production is completed, the first booster pump 4 and the first electric control valve 12 are powered off, that is, the booster pump stops running and the first electric control valve 12 is opened. At this time, the concentrated water in the water chamber 10 of the energy storage tank passes through The first electric control valve 12 and the first one-way valve 13 flow into the water supply pipe 1 and then into the source water pipe (generally, at this time, the pressure in the energy storage tank is higher than the source water pressure), and the user opens the upstream or downstream of the source water pipe When the tap is tapped, the concentrated water will be discharged for non-potable water use.

At the beginning of the next water production cycle, since there is little or no water in the water chamber 10 of the energy storage tank, after the first booster pump is started and the first electric control valve is closed, the concentrated water discharged from the outlet of the concentrated water zone 6 The flow will be very large, but at this time the water pressure in the concentrated water area is small, which will make the tangential flow of water flowing through the concentrated water side of the reverse osmosis membrane very large, resulting in the effect of high-intensity flushing (at this time, the filtration volume is small ), in order to effectively flush out the clogs that may be deposited on the membrane surface. As the flushing process proceeds, the water pressure in the water chamber 10 of the energy storage tank will gradually rise, and the tangential water flow flowing through the concentrated water side of the reverse osmosis membrane will gradually decrease, and the flow rate will gradually decrease. The flow of the water in the medium or the water discharged from the outlet 6 of the concentrated water area will gradually increase after the waste water ratio is depressurized, and then returned to the water inlet of the first booster pump, and the pressure in the concentrated water area will gradually increase. When the flow rate rises to the normal value The reverse osmosis filter begins to filter water normally.

Of course, the first electric control valve 12 can also be a normally closed electric control valve. If a normally closed electric control valve is used, its opening control needs to be adjusted accordingly in the process of water production-flush-reproduction, and it will not be described here. More details.

The maximum water storage capacity of the energy storage tank 9 can be less than 4L. Considering that the concentrated water in the energy storage tank can be discharged frequently, the concentration of the concentrated water will not be too high, so the volume can be smaller to reduce the manufacturing cost, preferably less than 2L.

Compared with the prior art, the use of the energy storage tank in Example 1 realizes the recycling of concentrated water without producing discharged waste water, which not only saves water resources, but also avoids the installation of waste water discharge pipes; due to the recycling of concentrated water , the system does not need a separate program for flushing the reverse osmosis membrane, but only needs to realize the flushing of the reverse osmosis membrane at the beginning of the next water production by making the water flowing through the surface of the reverse osmosis membrane at a relatively large tangential flow rate; Only 1/4 of the water is used when the device produces water, and 3/4 of the water is discharged out of the system as waste water, but this 3/4 of the discharged water still needs to be treated by the pre-treatment filter element, so the pre-treatment The utilization rate of the processing filter element is low, which seriously affects its service life. However, the design of the return pipeline in Embodiment 1 can effectively share the above-mentioned 3/4 of the influent flow, so the service life of the pretreatment filter element can be effectively extended.

Example 2

As shown in Figure 3, the connection relationship of each part of the non-wastewater reverse osmosis water purifier of embodiment 2 is similar to embodiment 1, and the difference is that the waste water ratio 8 is replaced by the second booster pump 14, and the connection position is different. The difference is that the inlet of the second booster pump 14 is connected to the water outlet of the water chamber 10 of the energy storage tank, and its outlet is connected to the outlet pipeline of the first booster pump 4 . Compared with Embodiment 1, the use of the second booster pump 14 can further increase the tangential flow of water flowing through the concentrated water side of the reverse osmosis membrane, and the flow is more stable.

It should be noted that the first booster pump 4 is used in the above-mentioned embodiments 1 and 2 on the water inlet pipeline, which is aimed at the situation that the source water pressure (i.e. tap water pressure) is low enough to overcome the resistance of the reverse osmosis membrane Designed under. However, when the source water pressure is relatively high, the first booster pump 4 does not need to be used. For specific embodiments, please refer to the following embodiments 3 and 4.

Example 3

As shown in Figure 4, the difference from Embodiment 2 is that a pressure switch 15 and a second electric control valve 16 are connected in series at the water supply pipe and the front end of the preprocessor, and the low pressure switch and the second electric control valve 16 set on the water inlet pipeline in Embodiment 2 are cancelled. A booster pump 4 .

In Embodiment 3, when water production is required, under the action of high water pressure, the pressure switch 15 is in a closed (or open) state, and the control system respectively turns on the second booster pump 14 according to the pressure switch signal and the required water production signal. 1. Open the second electric control valve 16 and close the first electric control valve 12, the source water passes through the second electric control valve 16 and the preprocessor in turn and enters the reverse osmosis filter element of the deep processor, and the pure water flows out from the outlet of the pure water area, Concentrated water enters the energy storage tank, is pressurized by the second booster pump on the return pipeline, and then returns to the water inlet of the reverse osmosis filter element, and the system enters the water production state; when the system detects that the water production volume meets the requirements (for example, it can A high-pressure switch is set at the outlet of the water area. When the high-pressure switch takes off, it can be considered that the water production has met the requirements), the control system closes the second electric control valve 16, closes the second booster pump 14 and opens the first electric control valve 12, that is The equipment is shut down; when the water tap in the pipeline needs to be used to open the water source, the water pressure at the pressure switch 15 drops to make it disconnected (or closed), and the control system opens the second electric control valve 16 according to the signal. The concentrated water in the energy tank flows to the source water pipe under pressure for non-drinking water use until the pressure at the pressure switch 15 rises when the faucet is closed. The second electric control valve 16, the user will repeat the above process when using the faucet next time (the system can set the function of accumulating the opening time of the second electric control valve 16, when the accumulated opening time reaches the set value, it means The concentrated water has been basically drained, and then the accumulated time stored in the control system will be cleared).

Example 4

As shown in Figure 5, different from Embodiment 3, the second electrically controlled valve 16 in Embodiment 3 is moved to the outlet of the pure water zone of the deep processor; in addition, between the preprocessor and the deep processor The second one-way valve 17 that can prevent the water from flowing reversely through the preprocessor is set on the water inlet pipeline.

When water production is required, the pressure switch 15 is in a closed (or open) state under high water pressure, and the control system opens the second booster pump 14 and the second electric control valve 16 according to the pressure switch signal and the required water production signal, and simultaneously closes The first electric control valve 12, the equipment enters the water production state of pure water; when the water production meets the requirements, the control system closes the second electric control valve 16 and the second booster pump 14, and opens the first electric control valve 12 at the same time. When the concentrated water in the energy storage tank flows to the faucet on the source water pipe (when the faucet is opened), it can be used for non-potable water. The concentrated water discharge in Embodiment 4 only needs to turn on the tap to release water, without additional control elements.

Example 5

As shown in Figure 6, the return line can also be connected to the water inlet line at the front end of the preprocessor, that is, the outlet of the waste water ratio is connected to the inlet line of the preprocessor; the first booster pump can also be connected to the preprocessor In the pipeline between the filter elements in series. Of course, other connection methods can also be arranged on the basis of not departing from the principle of the utility model.

The above disclosures are only a few specific embodiments of the utility model, but the utility model is not limited thereto, and any changes conceivable by those skilled in the art should be included in the scope of claims of the utility model.

Claims (10)

1. waste water-free reverse osmosis water purifier, be included in series connection is provided with in the suction culvert pretreater and dark treater, flow into dark treater through the pretreater treated water, wherein dark treater is an encloses container, be divided into pure water district and dense pool by reverse osmosis membrane, pure water flows out from the pure water outlet, it is characterized in that, also comprise the energy storage canister that is used to collect the dense water that produces when dark treater moves, the water outlet of energy storage canister is connected on the water pipe that leads directly to the water purifier water-in by discharge pipe line, and the water outlet of energy storage canister is connected by the suction culvert of return line with dark treater.

2. waste water-free reverse osmosis water purifier according to claim 1 is characterized in that, is provided with water cavity and air cavity in the described energy storage canister, is provided with barrier film between air cavity and the water cavity, and the dense hydraulic pressure that the gas that stores in the air cavity is flowed in the water cavity contracts and storage power.

3. waste water-free reverse osmosis water purifier according to claim 2 is characterized in that, establishes first electrically-controlled valve on the described discharge pipe line.

4. according to any described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, on the suction culvert of dark treater, first topping-up pump is set; On described return line throttling set is set, described throttling set exit end is connected with the inlet ductwork of described first topping-up pump.

5. according to any described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, on the suction culvert of dark treater, first topping-up pump is set; Second topping-up pump is set on described return line, and the export pipeline of described second topping-up pump is connected with the export pipeline of first topping-up pump.

6. according to any described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, second topping-up pump is set on return line.

7. according to any described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, second topping-up pump is set on return line; On described suction culvert, the interface of suction culvert and main water supply tube is provided with pressure-detecting device.

8. according to each described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, first check valve is set on the described discharge pipe line.

9. according to each described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, second check valve is set on the described suction culvert.

10. according to each described waste water-free reverse osmosis water purifier in the claim 1 to 3, it is characterized in that, can prevent when water purifier is not made water that dense pool pressure in the dark treater from continuing second electrically-controlled valve greater than pure water district pressure being arranged on the pure water outlet pipeline of dark treater or on the suction culvert of dark treater.

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