CN217868506U

CN217868506U - Drinking water supply system

Info

Publication number: CN217868506U
Application number: CN202222256325.9U
Authority: CN
Inventors: 朱四琛; 周梦德; 孙易蒙
Original assignee: AO Smith China Water Heater Co Ltd; AO Smith China Environmental Products Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd; AO Smith China Environmental Products Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-22
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a drinking water supply system, it relates to water treatment technology field, drinking water supply system includes: a filter unit having a membrane element, the filter unit having a raw water inlet, a filtered water outlet, and a waste water outlet; a carbonated water generating unit for generating carbonated water, the carbonated water generating unit being communicable with the raw water inlet of the filtering unit. The problem that the filtration rate of membrane element to water descends can be solved in this application.

Description

Drinking water supply system

Technical Field

The utility model relates to a water treatment technology field, in particular to drinking water supply system.

Background

In a conventional drinking water supply system, water is generally purified and filtered by using a filter unit having a membrane element, and impurities such as inorganic salts, heavy metal ions, organic substances, colloids, bacteria, viruses, and the like in the water are removed to some extent by the membrane element, and these impurities are discharged from the filter unit together with wastewater generated from the filter unit, and filtered water obtained by the membrane element is discharged from a filtered water outlet of the filter unit.

After the membrane element of the filtering unit filters water for a long time, impurities in the water, particularly organic matters and colloids, are easily adhered to the raw water side of the membrane element, and a polluted area can appear on the raw water side of the membrane element for a long time. In these contaminated areas, the rate of water permeation through the membrane element is attenuated, and over time, the rate of water filtration through the membrane element is reduced and the filtered water outlet flow rate of the filter unit is reduced, thereby failing to meet the user's water demand.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a drinking water supply system, which can solve the problem of the membrane element decreasing the filtration rate of water.

The embodiment of the utility model provides a concrete technical scheme is:

a potable water supply system, the potable water supply system comprising:

a filter unit having a membrane element, the filter unit having a raw water inlet, a filtered water outlet, and a wastewater outlet;

a carbonated water producing unit for producing carbonated water, the carbonated water producing unit being communicable with the raw water inlet of the filtering unit.

Preferably, the drinking water supply system further comprises: a functional valve having a wastewater ratio function, or a functional valve having a wastewater ratio function and an on-off function;

the functional valve is communicated with the waste water outlet; the drinking water supply system has a flushing state in which the functional valve is in a communication state and the carbonated water generating unit is in a communication state with the raw water inlet of the filtering unit, so that the carbonated water generated by the carbonated water generating unit is introduced into the raw water inlet of the filtering unit and is discharged after passing through the waste water outlet and the functional valve.

Preferably, the carbonated water generating unit has a gas inlet and a containing space for containing carbonated water, the gas inlet is used for being connected with a carbon dioxide gas source, the filtered water outlet can be communicated with the carbonated water generating unit, and the carbonated water generating unit can be communicated with the raw water inlet of the filtering unit through a water return pipeline.

Preferably, a first on-off valve is arranged on the water return pipeline.

Preferably, the drinking water supply system further comprises:

the carbonated water generating unit can be communicated with the first water storage unit through a first pipeline, and the first water storage unit can be communicated with the filtered water outlet;

a refrigeration unit for refrigerating the water in the first water storage unit;

a first pressure intensifier disposed on the first conduit.

Preferably, the drinking water supply system further comprises:

a water outlet control mechanism;

a first water outlet pipeline connected with the water outlet control mechanism and the first water storage unit, wherein a first water outlet control valve is arranged on the first water outlet pipeline;

and a second water outlet pipeline connected with the water outlet control mechanism and the carbonated water generating unit, wherein a second water outlet control valve is arranged on the second water outlet pipeline.

Preferably, the drinking water supply system further comprises: a second water storage unit communicable with the first water storage unit, the second water storage unit communicable with the filtered water outlet;

and a third water outlet pipeline connected with the water outlet control mechanism and the second water storage unit, wherein a third water outlet control valve is arranged on the third water outlet pipeline.

Preferably, the outlet of the first pressurizing device can be connected with the second water storage unit through a third pipeline in a switching mode.

Preferably, the drinking water supply system further comprises: a third water storage unit with a heating element, an inlet of the third water storage unit being communicable with the second water storage unit;

and the fourth water outlet pipeline is connected with the water outlet control mechanism and the outlet of the third water storage unit, and a fourth water outlet control valve is arranged on the fourth water outlet pipeline.

Preferably, the drinking water supply system further comprises:

and the second pipeline is arranged between the outlet of the first supercharging device and the first water storage unit and is used for communicating the outlet of the first supercharging device with the first water storage unit.

Preferably, the drinking water supply system includes: the carbonated water generating device comprises a first water storage tank and a second water storage tank, wherein the first water storage tank is provided with an inner cavity, the second water storage tank is at least partially arranged in the first water storage tank, a gap between the first water storage tank and the second water storage tank forms a first water storage unit, and the carbonated water generating unit comprises the second water storage tank.

Preferably, the drinking water supply system further comprises:

a pre-filter unit connected to the upstream of the raw water inlet of the filter unit;

the second water storage unit is communicated with an outlet of the post-filter unit.

Preferably, the carbonated water generating unit includes a carbon dioxide bubble bomb and a control mechanism for turning on the carbon dioxide bubble bomb and outputting carbon dioxide.

Preferably, the membrane element comprises at least one of: reverse osmosis membrane element, nanofiltration membrane element.

The technical scheme of the utility model following beneficial effect that is showing has:

when the membrane element in the filtering unit needs to be flushed to achieve the cleaning purpose, the drinking water supply system can utilize the carbonated water generating unit to generate carbonated water, and then the carbonated water is introduced into the raw water inlet of the filtering unit, so that the raw water side of the membrane element in the filtering unit is flushed by the carbonated water, impurities on the raw water side are removed, and the flushed carbonated water can be discharged from the waste water outlet of the filtering unit. Through the process, the filtering rate of the membrane element in the filtering unit to the water can be recovered to a certain degree, and the attenuation degree of the filtering rate of the membrane element to the water is reduced. In addition, the carbonated water belongs to the water which can be directly drunk, and the membrane element is flushed by the carbonated water, so that even if the membrane element is remained, the filtered water which is subsequently filtered and supplied to a user by the drinking water supply system cannot be adversely affected, and no harm exists.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely illustrative for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

FIG. 1 is a schematic structural diagram of a drinking water supply system in a first embodiment according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a drinking water supply system in a second embodiment according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a drinking water supply system in a third embodiment according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a drinking water supply system in a fourth embodiment according to an embodiment of the present invention;

FIG. 5 is a comparative graph of an experiment using tap water from area A as a water source with and without rinsing with carbonated water;

fig. 6 is a comparative graph of experiments using tap water from area B as a water source with and without rinsing with carbonated water.

Reference numbers to the above figures:

1. a first pressure boosting device; 2. a refrigeration unit; 21. an evaporator; 22. a compressor; 23. a condenser; 24. an expander; 3. a carbonated water generation unit; 31. carbon dioxide bubble bomb; 32. a control mechanism; 4. a first water storage unit; 5. a first pipeline; 51. a first open-close valve; 52. a first check valve; 6. a second pipeline; 61. a second opening/closing valve; 7. a third water storage unit; 8. a first water storage tank; 9. a second water storage tank; 10. a second water storage unit; 11. a third pipeline; 111. a third opening and closing valve; 12. a water outlet control mechanism; 13. a source of carbon dioxide gas; 131. a gas cylinder; 132. a pressure reducing device; 133. a fourth opening valve; 134. a second one-way valve; 135. a low-voltage switch; 14. a fourth pipeline; 15. a first water outlet pipeline; 151. a first water outlet control valve; 16. a second water outlet pipeline; 161. a second water outlet control valve; 17. a third water outlet pipeline; 171. a third water outlet control valve; 18. a fourth water outlet pipeline; 181. a fourth water outlet control valve; 20. a filtration unit; 21. a functional valve; 22. a water return pipeline; 221. a first on-off valve; 222. a third check valve; 23. a pre-filter unit; 24. a second supercharging device; 25. a water inlet valve; 26. a post-filtration unit; 27. a water inlet port; 28. a fourth check valve; 29. emptying the air; 30. a first purge valve; 31. a second evacuation valve.

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to solve the problem of the decrease of the filtration rate of the membrane element to water, a drinking water supply system is proposed in the present application, fig. 1 is a schematic structural diagram of the drinking water supply system in a first embodiment according to an embodiment of the present invention, and as shown in fig. 1, the drinking water supply system may include: a filter unit 20 having a membrane element, the filter unit 20 having a raw water inlet, a filtered water outlet, and a waste water outlet; a carbonated water producing unit 3 for producing carbonated water, the carbonated water producing unit 3 being communicable with the raw water inlet of the filter unit 20.

In the drinking water supply system of the present application, when the membrane elements in the filter unit 20 need to be flushed for cleaning, carbonated water can be generated by the carbonated water generation unit 3, and then the carbonated water is introduced into the raw water inlet of the filter unit 20, so that the raw water side of the membrane elements in the filter unit 20 is flushed with the carbonated water, thereby removing impurities on the raw water side, and the flushed carbonated water can be discharged from the waste water outlet of the filter unit 20. Through the above process, the filtration rate of the membrane elements in the filtration unit 20 to water can be recovered to a certain degree, and the attenuation degree of the filtration rate of the membrane elements to water can be reduced. In addition, the carbonated water belongs to the water which can be directly drunk, and the membrane element is flushed by the carbonated water, so that even if residues occur, the filtered water which is subsequently filtered and supplied to a user by the drinking water supply system cannot be influenced, and no harm exists.

In order to better understand the drinking water supply system of the present application, it will be further explained and illustrated below. As shown in fig. 1, the drinking water supply system may include: a filtering unit 20 and a carbonated water generating unit 3. Wherein the filter unit 20 is adapted to filter the water, thereby forming filtered water. The filter unit 20 has a raw water inlet, a filtered water outlet, and a waste water outlet. The filter unit 20 may have a membrane element, which mainly serves to filter water. The membrane element has a raw water side and a filtered water side, water is fed into the filter unit 20 from a raw water inlet of the filter unit 20 and flows to the raw water side of the membrane element, the water enters the membrane element from the raw water side for filtration, impurities are blocked by the membrane element at the raw water side, and the filtered water flows out from the filtered water side. The impurities form waste water with the water that has not passed through the membrane element, which is discharged from the waste water outlet of the filter unit 20.

In the above structure, the membrane element may be any type of element made of a filtration membrane that requires discharge of wastewater at the time of filtration, and specifically, the membrane element may be a reverse osmosis membrane element, a nanofiltration membrane element, or the like, which is not limited in any way in this application.

The carbonated water producing unit 3 is for producing carbonated water. The carbonated water producing unit 3 can communicate with the raw water inlet of the filtering unit 20. Specifically, as shown in fig. 1, it is possible that the carbonated water producing unit 3 can be directly communicated with the raw water inlet of the filtering unit 20. Alternatively, fig. 2 is a schematic structural diagram of a drinking water supply system in a second embodiment according to an embodiment of the present invention, as shown in fig. 2, as a practical matter, the drinking water supply system may include: a pre-filter unit 23 connected upstream of the raw water inlet of the filter unit 20, and a second pressure increasing device 24, wherein the second pressure increasing device 24 may be arranged upstream of the pre-filter unit 23 or downstream of the pre-filter unit 23. In this embodiment, the carbonated water producing unit 3 may be in communication with the inlet of the second pressurizing means 24 or in communication with the inlet of the pre-filter unit 23. If the carbonated water producing unit 3 communicates with the upstream of the inlet of the second booster device 24, the carbonated water produced by the carbonated water producing unit 3 may be driven into the raw water inlet of the filter unit 20 by the second booster device 24. Of course, in other possible manners, a third pressurizing means may be provided on a line from the carbonated water producing unit 3 to the raw water inlet of the filter unit 20 to drive the carbonated water produced by the carbonated water producing unit 3 into the raw water inlet of the filter unit 20. Alternatively, the carbonated water in the carbonated water producing unit 3 has a high pressure and can be naturally driven into the raw water inlet of the filter unit 20 by the pressure.

As a practical matter, as shown in fig. 1 and 2, the drinking water supply system may include: an inlet port 27 for connection to a source of water. An inlet port 27 may be located upstream of the pre-filter unit 23 and the second pressurizing device 24, and an inlet valve 25 is provided at the inlet port 27 to control the connection and disconnection between the drinking water supply system and the water source.

As shown in fig. 1 and 2, the drinking water supply system may include, as applicable: a functional valve 21 having a waste water ratio function, the functional valve 21 being in communication with the waste water outlet. The drinking water supply system may have a flushing state in which the functional valve 21 is in a communication state and the carbonated water generating unit 3 is in a communication state with the raw water inlet of the filter unit 20, so that the carbonated water generated by the carbonated water generating unit 3 is introduced into the raw water inlet of the filter unit 20 and discharged through the waste water outlet and the functional valve 21. In this configuration, a waste water ratio unit is provided in the functional valve 21. When the function valve 21 is in the communication state, the wastewater ratio unit can be communicated, and only a small amount of water is discharged. Preferably, the drinking water supply system may include: the functional valve 21 has a wastewater ratio function and an on-off function, and in this case, for example, the functional valve 21 may be a first water path and a second water path connected in parallel, the first water path is provided with a wastewater ratio unit and a second on-off valve, and the second water path is provided with a third on-off valve. Under the state of washing, functional valve 21 is in the connected state, and at this moment, the third on-off valve on the second water route is opened, and whole functional valve 21 is under the complete connected state, and the displacement can be guaranteed. Downstream of the functional valve 21 a fourth non-return valve 28 may be connected to prevent a return flow of waste water discharged by the functional valve 21.

In order to realize that the carbonated water generating unit 3 can generate carbonated water, in one possible embodiment, as shown in fig. 1 and 2, the carbonated water generating unit 3 may have a gas inlet and a receiving space receiving the carbonated water. The gas inlet is connected with a carbon dioxide gas source 13, the filtered water outlet can be communicated with the carbonated water generating unit 3, and the carbonated water generating unit 3 can be communicated with the raw water inlet of the filtering unit 20 through a water return pipeline 22. Carbon dioxide is supplied into the carbonated water producing unit 3 through the carbon dioxide gas source 13, and filtered water obtained by filtering in the filtering unit 20 can be introduced into the carbonated water producing unit 3, and the filtered water reacts with the carbon dioxide to produce carbonated water. In order to obtain carbonated water of higher concentration, the carbonated water generating unit 3 may be a pressure-bearing tank so as to increase the boost pressure to obtain carbonated water of higher concentration.

As a practical matter, as shown in fig. 1 and 2, the carbon dioxide gas source 13 may include: a gas cylinder 131 capable of storing carbon dioxide; a pressure reducing device 132; and a fourth closing valve 133, and the outlet of the gas cylinder 131 can communicate with the carbonated water generation unit 3 through the pressure reducing device 132 and the fourth closing valve 133. Further, a low pressure switch 135 may be disposed between the fourth closing valve 133 and the pressure reducing device 132, the low pressure switch 135 may be triggered at low pressure, and when the carbon dioxide in the gas cylinder 131 is about to be used up and the pressure value in the gas cylinder 131 is too low, the low pressure switch 135 is triggered, so that the functional water supply device gives an alarm to remind the user to replace the gas cylinder 131.

In order to prevent the gas or water in the carbonated water generating unit 3 from flowing back to the pressure reducing device 132 and the fourth opening 133 of the carbon dioxide gas source 13 under the action of pressure to cause leakage, etc., as shown in fig. 1 and 2, a second one-way valve 134 may be disposed between the outlet of the gas cylinder 131 and the carbonated water generating unit 3, and the second one-way valve 134 is used for communicating the outlet of the gas cylinder 131 to the carbonated water generating unit 3.

As shown in fig. 1 and 2, in order to control whether or not the carbonated water in the carbonated water generation unit 3 flows back to the raw water inlet of the filter unit 20 through the return line 22, a first on-off valve 221 may be provided on the return line 22. Further, in order to prevent the return of the carbonated water in the return line 22, a third check valve 222 that can be conducted from the carbonated water producing unit 3 to the raw water inlet direction of the filter unit 20 may be provided in the return line 22.

As a practical matter, as shown in fig. 1 and 2, the drinking water supply system may include: the first water storage unit 4 and the carbonated water generation unit 3 can be communicated with the first water storage unit 4 through a first pipeline 5, and the first water storage unit 4 can be communicated with a filtered water outlet; a refrigerating unit 2 for refrigerating water in the first water storage unit 4; a first pressure intensifying device 1 arranged on the first line 5.

Specifically, the first water storage unit 4 is used to store a certain volume of water. The refrigerating unit 2 is used for refrigerating the water stored in the first water storage unit 4, so that the water can be cooled to a lower temperature to become cold water and be stored in the first water storage unit 4 all the time, for example, the lower temperature may be a preferred cold water temperature set by a user. When the carbonated water producing unit 3 needs to add water, the cold water or uncooled water stored in the first water storage unit 4 may be directly input into the carbonated water producing unit 3. The carbonated water generating unit 3 serves to generate carbonated water, which may receive cold water or uncooled water provided from the first water storage unit 4, thereby generating carbonated water, which may be stored in the carbonated water generating unit 3. The input of cold water into the carbonated water producing unit 3 contributes to the increase in the concentration of the carbonated water produced by the carbonated water producing unit 3. When it is necessary to flush the membrane element of the filter unit 20, the carbonated water stored in the carbonated water producing unit 3 may be supplied to the raw water inlet of the filter unit 20 through the return line 22.

As shown in fig. 1 and 2, the carbonated water generation unit 3 may communicate with the first water storage unit 4 through the first pipe 5, and the cold water or uncooled water in the first water storage unit 4 may be fed to the carbonated water generation unit 3 through the first pipe 5. The first pressurizing device 1 may be provided on the first pipeline 5, an inlet of the first pressurizing device 1 may be capable of communicating with the first water storage unit 4, and an outlet of the pressurizing device may be capable of communicating with the carbonated water generating unit 3. Whether the cold water or the uncooled water in the first water storage unit 4 is supplied to the carbonated water generation unit 3 may be controlled by whether the first pressurizing device 1 is operated. The drinking water supply system may have a first operating state in which the first pressurizing device 1 is in an open state, and the water in the first water storage unit 4 flows into the carbonated water generating unit 3 through the first pressurizing device 1 and the first pipe 5. In this operation state, when the carbonated water in the carbonated water producing unit 3 runs out or runs short, the water in the first water storage unit 4 may be replenished to the carbonated water producing unit 3 by the first booster device 1, and the water in the first water storage unit 4 may be cold water that has been cooled, or may be not completely cooled water or uncooled water. Correspondingly, the carbonated water generating unit 3 may have a water level detecting unit therein, so that the drinking water supply system can judge the level of the carbonated water in the carbonated water generating unit 3, thereby determining whether the water in the first water storage unit 4 is replenished to the carbonated water generating unit 3 by the first pressurizing device 1. Of course, in other alternative embodiments, the carbonated water generating unit 3 may have other monitoring units commonly used by those skilled in the art for detecting whether the functional water generating unit needs to be replenished with water, such as a flow sensor, a timer, etc., which are not limited herein.

As shown in fig. 1 and 2, the second pipeline 6 in the drinking water supply system may be disposed between the outlet of the first pressurizing device 1 and the first water storage unit 4. The second pipeline 6 is used for communicating the outlet of the first supercharging device 1 with the first water storage unit 4. Whether the first pressurizing device 1 is operated or not can control whether the cold water or the uncooled water in the first water storage unit 4 flows back to the first water storage unit 4 through a part of the first pipeline 5 and the second pipeline 6. The drinking water supply system may have a second operating state in which the first pressurizing device 1 is in an open state, and the water in the first water storage unit 4 is returned to the first water storage unit 4 through the first pressurizing device 1 and the second pipeline 6. Meanwhile, the refrigerating unit 2 may be in an operation state to cool the water in the first water storage unit 4. Through the operation state, the first supercharging device 1 can be utilized to pump out the water in the first water storage unit 4 and then return the water to the first water storage unit 4 through the second pipeline 6, the water in the first water storage unit 4 can generate circular flow, so that the phenomenon that the water in the first water storage unit 4 is locally easy to freeze cannot be caused when the refrigeration unit 2 rapidly cools the water in the first water storage unit 4, particularly the water in the contact part with the refrigeration unit 2, once the water in the contact part with the refrigeration unit 2 is frozen, the thermal resistance between the refrigeration unit 2 and the water is increased, the heat transfer coefficient is greatly reduced, the refrigeration unit 2 cannot rapidly realize rapid cooling of the water in other areas in the first water storage unit 4, and cannot realize cooling of the water in other areas in the first water storage unit 4 to a lower temperature. Through the above-mentioned mode of this application just can avoid freezing of local water in the first water storage unit 4, increase the cooling rate of the water in other regions in the first water storage unit 4, realize the holistic rapid cooling of all water in the first water storage unit 4 simultaneously, do not have the poor problem of temperature layering cooling effect. In addition, the water in the first water storage unit 4 can be cooled to a lower temperature under the condition that the refrigerating unit 2 has the same performance. This is because once the water at the contact position of the refrigeration unit 2 freezes, the temperature of the outer side wall of the ice is higher than the temperature of the cold end of the refrigeration unit 2 due to certain thermal resistance of the ice, so that the temperature which can be reached by cooling the water in the first water storage unit 4 after the refrigeration unit 2 conducts the cold energy through the ice is higher than the temperature which can be reached by directly transferring the cold energy to the water in the first water storage unit 4 by the refrigeration unit 2 under the same condition so as to cool the water in the first water storage unit 4.

In one possible embodiment, in order to control whether the water output from the outlet of the pressure boosting device flows to the carbonated water generating unit 3 or flows back to the first water storage unit 4 when the first pressure boosting device 1 is operated, as shown in fig. 1 and 2, the first pipeline 5 may be provided with a first on-off valve 51, and the first on-off valve 51 may be located between the outlet of the first pressure boosting device 1 and the carbonated water generating unit 3. The second line 6 may be provided with a second open-close valve 61. When it is necessary to feed the water output from the outlet of the first pressurizing device 1 to the carbonated water producing unit 3, the first opening/closing valve 51 is opened and the second opening/closing valve 61 is closed. When it is necessary to return the water output from the outlet of the first pressure increasing device 1 to the first water storage unit 4, the first opening/closing valve 51 is closed and the second opening/closing valve 61 is opened. When it is necessary to feed the water output from the outlet of the first pressurizing device 1 to the carbonated water producing unit 3 and to return the water to the first water storage unit 4, the first on-off valve 51 is opened and the second on-off valve 61 is opened.

In order to prevent the water or gas in the carbonated water producing unit 3 from flowing backward through the first pipe 5, as shown in fig. 1 and 2, a first check valve 52 is provided in the first pipe 5 between the first pressurizing device 1 and the carbonated water producing unit 3, and the first check valve 52 is configured to communicate the outlet of the first pressurizing device 1 with the carbonated water producing unit 3. In order to produce high-concentration carbonated water, the pressure inside the carbonated water producing unit 3 is high, and therefore, in the above manner, it is possible to prevent gas inside the carbonated water producing unit 3, particularly carbon dioxide gas, from flowing back into the first water storage unit 4 or other components through the first pipe 5 to damage such components. Since the pressure inside the carbonated water generating unit 3 is relatively high, the pressure resistance of the carbonated water generating unit 3 may be greater than that of other components.

As shown in fig. 1 and 2, the water inlet end of the first pipeline 5 may be communicated with the lower portion of the first water storage unit 4. In this way, when the refrigeration unit 2 cools and cools the water in the first water storage unit 4, the water having a relatively low temperature in the first water storage unit 4 sinks to the lower portion, and the water having a relatively high temperature rises to the upper portion, so that in the first operation state, the water having a relatively low temperature in the lower portion of the first water storage unit 4 can be preferentially output and supplied to the carbonated water generation unit 3. Further, the water outlet end of the second pipeline 6 is communicated with the upper part of the first water storage unit 4. In the second running state, can take out the lower water of first water storage unit 4 lower part temperature relative preferentially and carry to first water storage unit 4 upper portion, mix with the water that the temperature is higher than normal, can effectively rise the temperature of first water storage unit 4 lower part like this, reduce the possibility that freezing appears in the water of first water storage unit 4 lower part and refrigeration unit 2 direct or indirect contact, can also help the cooling of the water on first water storage unit 4 upper portion simultaneously, and then make the water in first water storage unit 4 cooling speed on the whole faster.

In one possible embodiment, the potable water supply system may include a first water storage tank 8 having an interior cavity. The first water storage tank 8 has a partition portion therein, the partition portion partitioning the inner chamber into a first space and a second space which are independent of each other, the first water storage unit 4 including the first space, and the carbonated water generating unit 3 including the second space. Furthermore, the isolation part can be made of a material with good heat conduction performance, such as metal, so that the cold energy of the water in the first water storage unit 4 can be transmitted to the carbonated water generating unit 3, and the cold water in the carbonated water generating unit 3 can be insulated to prevent the temperature of the cold water from rising. In this way, the refrigeration unit 2 only needs to directly cool the water in the first water storage unit 4.

In another possible embodiment, as shown in fig. 1 and 2, the drinking water supply system may include: a first water storage tank 8 having an inner cavity and a second water storage tank 9 at least partially disposed in the first water storage tank 8, a space between the first water storage tank 8 and the second water storage tank 9 forming a first water storage unit 4, and a carbonated water generating unit 3 including the second water storage tank 9. Further, the lateral wall of the second water storage tank 9 can be arranged in the inner cavity of the first water storage tank 8, so that the first water storage tank 8 can surround the second water storage tank 9 in the circumferential direction, when the water stored in the first water storage unit 4 is cold water, the cold water can play a better heat preservation role on the second water storage tank 9, and the cold water input from the first water storage unit 4 to the second water storage tank 9 is prevented from being heated. The side wall of the second water storage tank 9 may be made of a material having a good heat conduction performance, for example, a metal, so that the compression resistance of the second water storage tank 9 may be improved, and the heat conduction performance of the side wall may be improved, which is helpful for transferring the cold energy of the cold water stored in the first water storage unit 4 to the functional water in the second water storage tank 9.

As shown in fig. 2, the refrigeration unit 2 may include an evaporator 21, and the evaporator 21 is used for introducing a low-temperature refrigerant, and the low-temperature refrigerant performs direct or indirect heat exchange with the water in the first water storage unit 4, so as to lower the temperature of the water in the first water storage unit 4 to a preferred cold water temperature set by a user. The refrigeration unit 2 may further include a compressor 22, a condenser 23, and an expander 24 connected in series, with the evaporator 21 connected between an inlet of the compressor 22 and an outlet of the expander 24. The above components are connected together to form a refrigerant cycle line through the operation of the compressor 22, and the refrigerant is charged into the line. Further, the evaporator 21 may be provided on the first water storage unit 4 to cool the water stored in the first water storage unit 4. Specifically, the evaporator 21 may be disposed in a space inside the first water storage unit 4, so that the water stored in the first water storage unit 4 can directly contact the evaporator 21 for heat exchange, thereby contributing to the improvement of the heat exchange effect. In other alternative embodiments, the evaporator 21 may be disposed around the outside of the first water storage unit 4, and heat transfer may be performed between the evaporator 21 and the first water storage unit 4.

As a matter of course, in order to supply the water in the first water storage unit 4 and the carbonated water in the carbonated water generation unit 3 to the user, as shown in fig. 1 and 2, the drinking water supply system may include: a water outlet control mechanism 12; a first water outlet pipeline 15 connecting the water outlet control mechanism 12 and the first water storage unit 4, wherein a first water outlet control valve 151 is arranged on the first water outlet pipeline 15; a second water outlet pipe 16 connecting the water outlet control means 12 and the carbonated water producing unit 3, and a second water outlet control valve 161 is provided in the second water outlet pipe 16.

Specifically, the water outlet control mechanism 12 may be a device capable of controlling the opening and closing of the water supply output, such as a faucet or the like. The first water storage unit 4 can be communicated with the water outlet control mechanism 12 through a first water outlet pipeline 15. The carbonated water generating unit 3 can be in communication with the water output means via a second water outlet line 16. In order to control the on/off between the first water storage unit 4 and the water output mechanism, a first water output control valve 151 may be disposed on the first water output pipeline 15, for example, when the first water output control valve 151 is opened, the water output control mechanism 12 is opened, and the cold water in the first water storage unit 4 after being cooled by the refrigeration unit 2 can be output and supplied to a user. In order to control the on/off of the carbonated water generating unit 3 and the outlet control mechanism 12, a second outlet control valve 161 may be disposed on the second outlet pipe 16, and when the second outlet control valve 161 is opened, the outlet control mechanism 12 is opened, so that the carbonated water in the carbonated water generating unit 3 can be outputted and supplied to the user. A safety valve may also be provided in the second outlet line 16 and may be located upstream of the second outlet control valve 161 to prevent excessive pressure in the second outlet line 16. When the user needs carbonated water, the functional water that has been generated in the carbonated water generation unit 3 may be output at any time and provided to the user. The carbonated water may be cold water or normal temperature water. When the carbonated water generating unit 3 is periodically self-cleaned and it is necessary to discharge the carbonated water in the carbonated water generating unit 3, the discharged carbonated water is used to return to the raw water inlet of the filtering unit 20, and then the carbonated water passes through the filtering unit 20, passes through the waste water outlet, passes through the functional valve 21, and is discharged. In the above process, the rinsing of the filter unit 20 with carbonated water is just achieved.

As a practical matter, fig. 3 is a schematic structural view of a drinking water supply system in a third embodiment according to an embodiment of the present invention, and as shown in fig. 3, a second water storage unit 10 may be provided in the functional water supply device, the second water storage unit 10 may be communicated with the first water storage unit 4, and the second water storage unit 10 may be communicated with the filtered water outlet; and a third water outlet pipeline 17 connecting the water outlet control mechanism 12 and the second water storage unit 10, wherein a third water outlet control valve 171 is arranged on the third water outlet pipeline 17. Specifically, the second water storage unit 10 serves to store a certain volume of water. A water level detecting unit for detecting an internal water level may be provided in the second water storage unit 10, and the second water storage unit 10 may communicate with the filtered water outlet of the filtering unit 20 to replenish the filtered water to the second water storage unit 10 through the filtering unit 20 according to the water level detected by the water level detecting unit.

The second water storage unit 10 may replenish the first water storage unit 4, and when the water in the first water storage unit 4 is insufficient or not full, the water in the second water storage unit 10 may be transferred to the first water storage unit 4. The height of the second water storage unit 10 may be higher than that of the first water storage unit 4, so that the water in the second water storage unit 10 is transferred into the first water storage unit 4 by using gravity. Correspondingly, a water level detecting unit for detecting the internal water level may be disposed in the first water storage unit 4, so that the drinking water supply system can judge the level of water in the first water storage unit 4, thereby determining whether to replenish water to the first water storage unit 4 through the second water storage unit 10. In order to realize the controllability of the water supply from the second water storage unit 10 to the first water storage unit 4, the second water storage unit 10 and the first water storage unit 4 may be connected by a fourth pipe 14, and a fifth opening/closing valve may be provided on the fourth pipe 14. Of course, in other alternative embodiments, the first water storage unit 4 and the second water storage unit 10 may also have other monitoring units commonly used by those skilled in the art for detecting whether the first water storage unit 4 and the second water storage unit 10 need to be replenished, such as a flow sensor, a timer, etc., which are not limited herein.

As shown in fig. 3, the second water storage unit 10 can be communicated with the water outlet control mechanism 12 through a third water outlet pipeline 17. In order to control the on/off of the second water storage unit 10 and the water outlet control mechanism 12, a third water outlet control valve 171 may be disposed on the third water outlet pipeline 17, for example, when the third water outlet control valve 171 is opened, the water outlet control mechanism 12 is opened, and the filtered water in the second water storage unit 10 at normal temperature can be outputted and supplied to the user. In this way, the outlet control means 12 can supply the normal temperature filtered water, the cold filtered water, and the cold carbonated water to the user, respectively.

Further, as shown in fig. 3, the outlet of the first pressurizing device 1 can be connected to or disconnected from the second water storage unit 10 through a third pipeline 11. In order to better control whether the water output by the first pressure boosting device 1 is delivered to the second water storage unit 10, the third pipeline 11 may be provided with a third opening/closing valve 111.

As a possibility, the drinking water supply system may also have a third operating state in which the first pressure boosting device 1 is in an open state and the water in the first water storage unit 4 flows into the second water storage unit 10 via the first pressure boosting device 1 and the third pipeline 11. Meanwhile, the water in the second water storage unit 10 can flow back to the first water storage unit 4, so that the water in the first water storage unit 4 and the water in the second water storage unit 10 circulate. As a possibility, the first water storage unit 4 may be provided with a first ultraviolet germicidal lamp for sterilizing water stored in the first water storage unit 4. In the third operating state, the first ultraviolet germicidal lamp may be turned on, so that the water in the first water storage unit 4 and the second water storage unit 10 can be sufficiently sterilized, and the water in the corresponding pipeline can be sterilized at the same time. As a matter of course, the second water storage unit 10 may be provided with a second ultraviolet germicidal lamp for sterilizing the water stored in the second water storage unit 10, and the second ultraviolet germicidal lamp has a relatively better sterilization effect on the water stored in the second water storage unit 10 because there is no shelter in the second water storage unit 10. Under the third running state, the second ultraviolet germicidal lamp can be in the on state, so that the water in the first water storage unit 4 and the second water storage unit 10 can be well sterilized, and meanwhile, the water in the corresponding pipeline can also be sterilized.

In a third operating state, the refrigeration unit 2 may be in an operating state to cool the water in the first water storage unit 4, and the water in the first water storage unit 4 and the water in the second water storage unit 10 are circulated through the first pressurization device 1, so that the water in the second water storage unit 10 can also be cooled and finally becomes cold water. When a user needs a large amount of cold water or a large amount of cold functional water, the user can switch the functional water supply device to a third running state in advance, so that the drinking water supply system can completely cool the water in the first water storage unit 4 and the second water storage unit 10 to the cold water with the temperature set by the user in advance, and when the user needs the cold water or the cold functional water in the later period, the drinking water supply system can supply the cold water in the first water storage unit 4 to the user for use, and then can input the cold water in the second water storage unit 10 into the first water storage unit 4 and supply the cold water to the user through the first water storage unit 4, so that the effect of increasing the volume of the first water storage unit 4 is achieved in a phase change manner; or, the drinking water supply system may supply the cold carbonated water in the carbonated water generating unit 3 to the user, then input the cold water in the first water storage unit 4 into the carbonated water generating unit 3, and directly generate the cold carbonated water by the carbonated water generating unit 3 to the user, after the cold water in the first water storage unit 4 is used up, the cold water in the second water storage unit 10 may supplement the first water storage unit 4, so that the carbonated water generating unit 3 can directly generate the cold carbonated water to be supplied to the user, and the cold carbonated water in the sum of the volume of the carbonated water generating unit 3 and the volume of the first water storage unit 4 and the volume of the second water storage unit 10 can be directly output in a short period of time. By the mode, the requirement of a user on cold water or cold carbonated water under a large water intake quantity is met.

As a practical matter, as shown in fig. 3, the drinking water supply system may include: a third water storage unit 7 with a heating element, wherein the inlet of the third water storage unit 7 can be communicated with the second water storage unit 10; a fourth water outlet pipeline 18 connected with the water outlet control mechanism 12 and the outlet of the third water storage unit 7, and a fourth water outlet control valve 181 is arranged on the fourth water outlet pipeline 18. The heating member can heat the water in the third water storage unit 7 into hot water, and when the water in the third water storage unit 7 is insufficient, the water in the second water storage unit 10 can be replenished into the third water storage unit 7. For example, when the fourth outlet control valve 181 is opened, the outlet control mechanism 12 is opened, and the hot water in the third water storage unit 7 can be output and supplied to the user. In the above manner, the outlet control mechanism 12 may also supply hot filtered water to the user.

In order to enable the water in the third water storage unit 7 and the first water storage unit 4 to be drained, as shown in fig. 3, the drinking water supply system may include: and a drain 29 which can communicate with the third water storage unit 7 and the first water storage unit 4, respectively. A first drain valve 30 is arranged between the drain port 29 and the third water storage unit 7, and a second drain valve 31 is arranged between the drain port 29 and the first water storage unit 4.

As a practical matter, as shown in fig. 1 to 3, the drinking water supply system may include: a post-filter unit 26 connected downstream of the filtered water outlet of the filter unit 20. The first water storage unit 4 may communicate with the outlet of the post-filter unit 26. When a second water storage cell 10 is present, the second water storage cell 10 may be in communication with the outlet of the post-filtration unit 26.

In another embodiment, fig. 4 is a schematic structural diagram of a drinking water supply system in a fourth embodiment according to an embodiment of the present invention, and as shown in fig. 4, the carbonated water generating unit 3 may include a carbon dioxide bubble bomb 31 and a control mechanism 32 for opening the carbon dioxide bubble bomb 31 and outputting carbon dioxide. The carbon dioxide bubble bomb 31 may be installed in cooperation with the control mechanism 32, for example, the carbon dioxide bubble bomb 31 may be inserted into the control mechanism 32, and the user may insert the carbon dioxide bubble bomb 31 by himself. The carbonated water producing unit 3 may be connected to a pipe at an arbitrary position upstream of the raw water inlet of the filter unit 20. The carbon dioxide gas bubble bomb 31 is a consumable and needs to be replaced periodically. When the membrane element needs to be washed, the water inlet valve 25 is opened, the control mechanism 32 opens the carbon dioxide bubble bomb 31, carbon dioxide in the carbon dioxide bubble bomb 31 instantly washes the inlet water input from the water inlet port, the carbon dioxide and the inlet water form carbonated water which enters the raw water inlet of the filtering unit 20, so that the membrane element is washed, and the washed carbonated water is discharged from the waste water outlet.

The drinking water supply system of the present application generates carbonated water by using the carbonated water generating unit 3, and then flushes the membrane element raw water side in the filter unit 20 with the carbonated water, thereby removing impurities on the raw water side, and the flushed carbonated water can be discharged from the waste water outlet of the filter unit 20. For example, fig. 5 is a comparison graph of experiments using tap water from area a as a water source with and without carbonated water flushing, and as shown in fig. 5, after a certain amount of water passes through the same size of filter unit 20, the flow rate of the filter unit 20 is attenuated to 0.15L/min by about 50% without any carbonated water flushing, and the flow rate of the filter unit 20 is attenuated to 0.29L/min by about 4% with regular carbonated water flushing. Similarly, fig. 6 is a comparison graph of experiments using tap water from area B as a water source with and without carbonated water flushing, and as shown in fig. 6, after a certain amount of water passes through the same size of filter unit 20, the flow rate of the filter unit 20 is attenuated to 0.22L/min by about 27% without any carbonated water flushing, and the flow rate of the filter unit 20 is attenuated to 0.27L/min by about 10% with regular carbonated water flushing. It can be seen from the above experiments that the membrane elements of the filtration unit 20 are washed with carbonated water, so that the filtration rate of the membrane elements in the filtration unit 20 to water can be recovered to a certain extent, and the attenuation degree of the filtration rate of the membrane elements to water can be reduced.

In addition, the carbonated water belongs to the water which can be directly drunk, and the membrane element is flushed by the carbonated water, so that even if residues occur, the filtered water which is subsequently filtered and supplied to a user by the drinking water supply system cannot be influenced, and no harm exists. Finally, carbonated water helps to reduce the risk of fouling of the above components as it flows through the functional valves and corresponding piping.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of 8230comprises the elements, components or steps identified and other elements, components or steps which do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The above description is only a few embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A potable water supply system, characterized in that the potable water supply system comprises:

a carbonated water generating unit for generating carbonated water, the carbonated water generating unit being communicable with the raw water inlet of the filtering unit.

2. The potable water supply system of claim 1, further comprising: a functional valve having a wastewater ratio function, or a functional valve having a wastewater ratio function and an on-off function;

3. The drinking water supply system according to claim 1, wherein the carbonated water generating unit has a gas inlet for connection with a carbon dioxide gas source and a receiving space for receiving carbonated water, the filtered water outlet is communicable with the carbonated water generating unit, and the carbonated water generating unit is communicable with the raw water inlet of the filtering unit through a return line.

4. A drinking water supply system according to claim 3, wherein a first on-off valve is provided on the return water line.

5. The potable water supply system of claim 3, further comprising:

a first pressure intensifier disposed on the first conduit.

6. A potable water supply system according to claim 5, wherein the potable water supply system further comprises:

a water outlet control mechanism;

7. The potable water supply system of claim 6, further comprising: a second water storage unit communicable with the first water storage unit, the second water storage unit communicable with the filtered water outlet;

and the third water outlet pipeline is connected with the water outlet control mechanism and the second water storage unit and is provided with a third water outlet control valve.

8. The drinking water supply system according to claim 7, wherein the outlet of the first pressurizing device is connectable to the second water storage unit through a third pipeline.

9. The potable water supply system of claim 7, further comprising: a third water storage unit with a heating element, an inlet of the third water storage unit being communicable with the second water storage unit;

10. The potable water supply system of claim 5, further comprising:

11. The potable water supply system of claim 5, wherein the potable water supply system comprises: the carbonated water generating device comprises a first water storage tank with an inner cavity and a second water storage tank at least partially arranged in the first water storage tank, wherein a gap between the first water storage tank and the second water storage tank forms the first water storage unit, and the carbonated water generating unit comprises the second water storage tank.

12. The potable water supply system of claim 7, further comprising:

the second water storage unit is communicated with the outlet of the post-filtering unit.

13. A potable water supply system according to claim 1, wherein the carbonated water generating unit comprises a carbon dioxide bubble bomb and a control mechanism for turning on the carbon dioxide bubble bomb and causing carbon dioxide to be output.

14. The drinking water supply system according to claim 1, wherein the membrane element comprises at least one of: reverse osmosis membrane element, nanofiltration membrane element.