Water purification equipment

Abstract

Raw water received by the water purification equipment provided by the invention sequentially passes through the front filter, the pump, the RO filter and the rear filter, so that drinking water is filtered and stored by the rear filter. The circulating water production loop is connected with the rear filter and the pump so that drinking water can flow. The water quality detector is used for detecting drinking water to generate a corresponding water quality signal. The control valve is connected with the circulating water production loop. The controller has a water quality standard and a cycle period and is used for receiving the water quality signal. When the water outlet piece is closed to supply the drinking water and the water quality signal of the controller exceeds the water quality standard, the controller starts the pump and the control valve, so that the drinking water of the post-filter is made into water again through the circulating water making loop, and the drinking water of the post-filter is re-purified.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and particularly to a water purification equipment that can reduce the total dissolved solid concentration in water in a circulating manner. Background Art

[0002] Currently, when a direct-out RO water purification equipment supplies drinking water, it directly supplies the drinking water remaining inside the RO filter. However, the drinking water remaining inside the RO filter is prone to an increase in the total dissolved solid (TDS) concentration due to the increase in residence time and the change in pressure inside the RO filter, resulting in the user obtaining drinking water with a higher TDS concentration.

[0003] The utility model patent CN205382026 discloses a water purifier with automatic rapid waterway cleaning, which can wash the RO membrane filter element through manual operation or automatic operation to wash the stale water remaining in the pipeline behind the RO membrane filter element for three days or more. However, in fact, the total dissolved solid (TDS) concentration of the water in the RO membrane filter element will increase with the increase in pressure and time inside the RO membrane filter element. Usually, it doesn't need to wait until three days. Therefore, when the user takes drinking water, they still get drinking water with a relatively high total dissolved solid concentration. In addition, although manual operation can also improve the above problems, the user needs to perform cleaning before each water intake. In this way, the user needs to wait for a period of time before taking water, resulting in a poor experience and inconvenient use. A patent for a similar technology is the utility model patent TWM566108U, which performs cleaning in the standby state.

[0004] The invention patent CN114555532A discloses a water purifier, which also discloses that the TDS concentration in the reverse osmosis filter will increase after not filtering water for a period of time. Therefore, it supplies relatively clean drinking water by cleaning the filter before use. However, the water in the post-filter in this patent is not washed, so the user still gets water with a relatively high TDS concentration remaining in the post-filter. Summary of the Invention

[0005] In view of this, the present invention mainly provides a water purification equipment that can re-circulate water production according to the water quality condition in the post-filter to improve the total dissolved solid concentration of the drinking water in the post-filter, so as to provide cleaner water for use.

[0006] To achieve the above main purpose, the water purification device provided by the present invention includes a pre-filter, an RO filter, a pump, a post-filter, a circulating water production circuit, a water outlet member, a water quality detector, a control valve, and a controller. The pre-filter is used to filter raw water. The RO filter has a water inlet and a water outlet. The pump includes a water inlet end and a water outlet end. The water inlet end is connected to the pre-filter. The water outlet end is connected to the water inlet of the RO filter. The post-filter is connected to the water outlet of the RO filter and is used to filter and store a drinking water. The circulating water production circuit is connected to the post-filter and the water inlet end of the pump to allow the drinking water to flow. The water quality detector is connected to the circulating water production circuit and is used to detect the drinking water to generate a corresponding water quality signal. The control valve is connected to the circulating water production circuit and is located between the water quality detector and the water inlet end of the pump. The controller is electrically connected to the pump, the water quality detector, and the control valve, and has a water quality standard and a circulation period, and is used to receive the water quality signal. Wherein, when the water outlet member closes the supply of drinking water, when the water quality signal exceeds the water quality standard, the controller starts the pump and the control valve within the circulation period, so that the drinking water in the post-filter passes through the circulating water production circuit to re-produce water, so as to re-purify the drinking water in the post-filter.

[0007] Through the above technical features, the controller of the water purification device provided by the present invention detects the water quality signal generated by the water quality detector for the drinking water, and re-produces water when the water quality signal exceeds the water quality standard, so as to purify the water in the post-filter, so that the drinking water in the post-filter is drinking water that meets the water quality standard. When the water quality signal meets the water quality standard, the controller does not need to re-produce water. Thus, the water purification device of the present invention can produce water more intelligently, so as to reduce water resource waste and improve the user experience.

[0008] Preferably, the water quality standard of the controller includes the total dissolved solid concentration of the drinking water, and the time of the circulation period is at least 20 seconds, so that the drinking water in the post-filter of the water purification device can be effectively re-purified.

[0009] Preferably, the water quality standard and the circulation period can be adjusted by the controller, so that the water purification device can set more suitable parameters according to the raw water conditions at the installation location.

[0010] Preferably, the controller closes the control valve after the circulation period ends to prevent the drinking water in the post-filter from flowing through the control valve.

[0011] Preferably, the water purification device further includes a check valve, which is connected to the circulating water production circuit and is located between the control valve and the water inlet end of the pump to block the raw water filtered by the pre-filter from flowing through.

[0012] Preferably, the water inlet end of the pump receives and mixes the drinking water and the raw water filtered by the pre-filter within the circulation period to re-produce a sufficient amount of drinking water.

[0013] Details of the water purification device provided by the present invention, including its structure, features, assembly, or usage method, will be described in the subsequent detailed description of the embodiments. However, those skilled in the art should understand that these detailed descriptions and the specific embodiments listed for implementing the present invention are only used to illustrate the present invention and are not used to limit the protection scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, the above and other objects, features, and advantages of the present disclosure will become clearer. In the drawings:

[0015] Figure 1 It is a schematic diagram of the water flow of the water purification device of the present invention, showing the state where the water component is open and the control valve is closed;

[0016] Figure 2 It is a schematic diagram of the water flow of the water purification device of the present invention, showing the state where the water component is closed and the control valve is open; and

[0017] Figure 3 It is a schematic diagram of the water flow of the water purification device of the present invention, showing the state where the water component is closed and the control valve is closed.

[0018] In the above-mentioned drawings, the meanings of the reference numerals are specifically as follows:

[0019] 1. Water purification device;

[0020] 10. Front pipeline;

[0021] 11. Prefilter;

[0022] 20. Pump;

[0023] 21. Water inlet end;

[0024] 22. Water outlet end;

[0025] 30. RO filter;

[0026] 31. Water inlet;

[0027] 32. Water outlet;

[0028] 33. Reverse osmosis membrane;

[0029] 40. Wastewater pipeline;

[0030] 41. Wastewater valve;

[0031] 50. Rear pipeline;

[0032] 51. Post-filter;

[0033] 53. Water outlet component;

[0034] 60. Circulating water supply circuit;

[0035] 61. Water quality detector;

[0036] 62. Control valve;

[0037] 63. Check valve;

[0038] 64. Connector;

[0039] 70. Controller. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the following further describes the present invention in detail with reference to specific embodiments and the accompanying drawings. The terms used herein are only for describing specific embodiments and are not intended to limit the present invention.

[0041] The terms "including", "comprising" and the like used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components. All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0042] In this document, unless otherwise specifically stated, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to represent the orientation or positional relationship based on the orientation shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the object being described changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be construed as limiting the present invention.

[0043] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, and C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc. In the case of using expressions such as "at least one of A, B, or C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, or C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.

[0044] Those skilled in the art can understand that the features recited in various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in various embodiments and / or claims of the present invention can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

[0045] Please refer to Figure 1 , the water purification device 1 provided by the present invention includes a front pipeline 10, a pump 20, an RO filter 30, a waste water pipeline 40, a rear pipeline 50, a circulating water production circuit 60, a water quality detector 61, a control valve 62, a check valve 63 and a joint 64, and a controller 70.

[0046] As Figure 1 shown, the front pipeline 10 is provided with a front filter 11, and the front filter 11 is used to filter raw water, and the raw water can be tap water or domestic water. The front filter 11 can be used alone with a cotton filter element, an activated carbon filter element, a soft water filter element, etc. or use a variety of the foregoing filter elements.

[0047] The pump 20 has a water inlet end 21 and a water outlet end 22. The water inlet end 21 is connected to the front filter 11 of the front pipeline 10, and the pump 20 can also be called a pumping motor.

[0048] The RO filter 30 has a water inlet 31 and a water outlet 32. The water inlet 31 of the RO filter 30 is connected to the water outlet end 22 of the pump 20, and the RO filter 30 also has a reverse osmosis membrane 33. Among them, the pump 20 is used to inject the raw water filtered by the front filter 11 into the RO filter 30 to purify the water quality through the reverse osmosis membrane 33.

[0049] The wastewater pipe 40 is provided with a wastewater valve 41. The wastewater pipe 40 is connected to the water outlet 32 of the RO filter 30 and is used to discharge the wastewater generated by the RO filter 30.

[0050] The post-pipeline 50 is connected to the water outlet 32 of the RO filter 30 and includes a post-filter 51. The post-filter 51 receives the water purified by the RO filter 30 and filters it into drinking water through the filter core of the post-filter 51, which is then stored in the post-filter 51.

[0051] A circulating water supply circuit 60 connects the post-filter 51 and the water inlet 21 of the pump 20 to supply drinking water. The circulating water supply circuit 60 is indicated by thick black lines. A water outlet 53, which can be a faucet or other water supply switch, is connected to the circulating water supply circuit 60. It supplies drinking water when the outlet 53 is turned on and suspends the supply of drinking water when the outlet 53 is turned off.

[0052] The pre-filter 11 , the pump 20 , the RO filter 30 , the post-filter 51 , the water outlet 53 and the circulating water circuit 60 are connected through water pipes.

[0053] The water quality detector 61 is connected to the water circulation circuit 60 and is located near the post-filter 51. In this embodiment, the water quality detector 61 is located between the water outlet 53 and the post-filter 51. The water quality detector 61 is used to test the drinking water and generate a corresponding water quality signal. Because the water quality detector 61 is closer to the post-filter 51, the water quality signal is more closely aligned with the water quality of the drinking water within the post-filter 51. The water quality detector 61 detects the total dissolved solids (TDS) concentration of the water to generate a corresponding water quality signal.

[0054] The control valve 62 is connected to the water circulation loop 60 and is located between the water quality detector 61 and the water inlet 21 of the pump 20 to regulate the flow of drinking water in the water circulation loop 60 .

[0055] The check valve 63 and the connector 64 connect the circulating water production circuit 60. The check valve 63 is located between the control valve 62 and the connector 64. In this embodiment, the connector 64 can be the end of the circulating water production circuit 60 to connect the water inlet end 21 of the pump 20 and the pre-filter 11.

[0056] In other embodiments, if the control valve 62 can effectively block the raw water filtered by the pre-filter 11 , the check valve 63 can be omitted.

[0057] The controller 70 is electrically connected to the pump 20, the water quality detector 61, and the control valve 62, and has a water quality standard and a circulation period. The electrical connection is achieved through wires. The controller 70 is used to receive the water quality signal and re-produce water according to the water quality signal. The water quality standard of the controller 70 includes the total dissolved solid concentration of drinking water, and the time of the circulation period is at least 20 seconds. The total dissolved solid concentration of drinking water is related to the raw water conditions in each region. Therefore, in fact, the appropriate total dissolved solid concentration of drinking water can be set according to the raw water conditions in each region. The circulation period is related to the capacity of the post-filter 51. In this embodiment, 20 seconds is taken as an example with a capacity of 500 ml. When it exceeds 500 ml, the time of the circulation period can also be extended by the controller 70. In other embodiments, when it is less than 500 ml, the time of the circulation period can also be reduced. In this way, the water purification device 1 of the present invention can set the water quality standard and the circulation period closer to the water quality conditions of the installation area.

[0058] Please refer to Figure 2 , when the water outlet member 53 is closed, it means that drinking water cannot be supplied through the water outlet member 53, and the water in the overall pipeline of the water purification device 1 is generally stationary. The controller 70 receives the water quality signal generated by the water quality detector 61 and judges the total dissolved solid concentration of the water quality signal corresponding to drinking water according to the water quality standard. When the water quality signal exceeds (is greater than) the water quality standard, the controller 70 starts the pump 20 and the control valve 62 within the circulation period to re-produce water through the circulating water production circuit 60 with the drinking water in the post-filter 51 to purify the drinking water in the post-filter 51.

[0059] For example, after the water purification device is not used for water intake, the total dissolved solid concentration of the water quality in the RO filter 30 will gradually increase. In a short time, the drinking water in the post-filter 51 is less affected. At this time, when the user obtains about 500 ml of water through the water outlet member 53, it will be the drinking water stored in the post-filter 51, and the total dissolved solid concentration of the drinking water is lower than the total dissolved solid concentration of the water quality in the current RO filter 30. Then, the user closes the water outlet member 53. It should be noted that during the water intake process, the water with a higher total dissolved solid concentration originally remaining in the RO filter 3 would flow along the pipeline into the post-filter 51, which means that the total dissolved solid concentration of the drinking water in the post-filter 51 may be higher than the water quality standard set by the controller 70. Therefore, the controller 70 can compare the water quality standard and the water quality signal, and re-produce water when it exceeds the water quality standard, so that the drinking water in the post-filter 51 flows through the control valve 62, the check valve 63, and the joint 64, and is mixed with the raw water filtered by the pre-filter 11, and is injected into the RO filter 30, the post-filter 51, and the circulating water production circuit 60 again through the pump 20 to purify the drinking water in the post-filter 51 within the circulation period to meet the water quality standard set by the controller 70 and maintain the quality of the drinking water in the post-filter 51.

[0060] However, if the water quality signal of the drinking water does not exceed the water quality standard, the controller 70 does not need to produce water again.

[0061] Finally, as Figure 3 shown, after the cycle of the controller 70 ends, the controller 70 closes the control valve 62, so that the drinking water of the post-filter 51 cannot flow through the control valve. In this way, the user can still obtain drinking water that meets the water quality standard when taking water next time.

[0062] In summary, the water purification device 1 provided by the present invention can stably purify the drinking water quality of the post-filter 51 through the operation of the water quality detector 61, the control valve 62 and the controller 70, so as to avoid supplying drinking water that exceeds the water quality standard to the user.

[0063] The embodiments of the present invention have been described above. However, these embodiments are only for illustrative purposes and not for limiting the scope of the present invention. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should fall within the scope of the present invention.

Claims

1. A water purification device, comprising: A pre-filter for filtering raw water; A RO filter having a water inlet and a water outlet; A pump including a water inlet end and a water outlet end, the water inlet end being connected to the pre-filter, and the water outlet end being connected to the water inlet of the RO filter; A post-filter connected to the water outlet of the RO filter and for filtering and storing drinking water; A circulating water production circuit connected to the post-filter and the water inlet end of the pump for the drinking water to flow; A water outlet member connected to the circulating water production circuit and for supplying and closing the supply of the drinking water; A water quality detector connected to the circulating water production circuit and for detecting the drinking water to generate a corresponding water quality signal; A control valve connected to the circulating water production circuit and located between the water quality detector and the water inlet end of the pump; A controller, electrically connected to the pump, the water quality detector and the control valve, and having a water quality standard and a circulation period, and configured to receive the water quality signal, wherein, When the water outlet member closes the supply of the drinking water, when the water quality signal exceeds the water quality standard, the controller starts the pump and the control valve within the circulation period, so that the drinking water in the post-filter passes through the circulating water production circuit for re-water production to re-purify the drinking water in the post-filter.

2. The water purification device according to claim 1, wherein, The water quality standard of the controller includes the total dissolved solid concentration of the drinking water, and the time of the circulation period is at least 20 seconds.

3. The water purification device according to claim 2, wherein The water quality standard and the circulation period are adjusted by the controller.

4. The water purification device according to claim 1, 2 or 3, wherein, The controller closes the control valve after the end of the circulation period.

5. The water purification device according to claim 1, wherein, It further includes a check valve connected to the circulating water production circuit and located between the control valve and the water inlet end of the pump.

6. The water purification device according to claim 1, wherein, The water inlet end of the pump receives the drinking water and the raw water filtered by the pre-filter within the circulation period.

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