KR20220043025A - Water softening system - Google Patents

Abstract

The present invention relates to a water softening system, comprising: first and second filter units selectively performing one among a removal mode in which at least a part of ionic substances contained in the supplied raw water is removed based on electric power to discharge soft water containing less ionic substances than the raw water, and a regeneration mode in which the ionic material collected during the removal mode is discharged together with the supplied raw water and regenerated water containing more ionic materials than the raw water is discharged; first and second supply passages provided to supply the raw water to the first and second filter units, respectively; first and second discharge passages provided to discharge the soft water or the regenerated water from the first and second filter units, respectively; a first recovery passage part guiding at least part of the regenerated water in the first discharge passage to the second supply passage; and a second recovery passage part guiding at least part of the regenerated water in the second discharge passage to the first supply passage. The present invention is to increase the recovery rate.

Description

Training system {WATER SOFTENING SYSTEM}

The present invention relates to a water softening system.

The soft water system is a system that produces soft water from raw water and supplies it to a consumer. For example, in a PoE (Points of Entry)-type soft water system, the consumer can become a home, and the soft water delivered to the consumer is again delivered to a faucet, shower head, etc. that require water use.

Filters that soften raw water by removing ionic substances from raw water are not permanently usable, and even filters that can be used semi-permanently must be regenerated periodically to discharge the collected ionic substances to be used smoothly. Do.

In an electric deionization system that deionizes raw water using electric force, there is a limit to increasing the recovery rate. The recovery rate is the amount of water input divided by the amount of discharged soft water, which generally amounts to about 80%. If the amount of soft water is excessively increased to increase the recovery rate, ionic substances are not sufficiently removed from the raw water and the soft water performance is deteriorated, such as low quality soft water is discharged.

The present invention has been devised to solve such problems, and it is to provide a water softening system with an increased recovery rate.

The soft water system according to an embodiment of the present invention removes at least a portion of the ionic material contained in the supplied raw water based on electrical force, and discharges soft water containing less ionic material than the raw water. , The first and second filter units selectively performing any one of the regeneration modes of discharging the ionic substances collected during the removal mode together with the supplied raw water, and discharging the recycled water containing more ionic substances than the raw water ; first and second supply passages provided to supply the raw water to the first and second filter units, respectively; first and second discharge passages provided to discharge the soft water or the regenerated water from the first and second filter units, respectively; a first recovery passage for guiding at least a portion of the regenerated water in the first discharge passage to the second supply passage; and a second recovery passage for guiding at least a portion of the regenerated water in the second discharge passage to the first supply passage.

Accordingly, it is possible to increase the recovery rate of the soft water system.

1 is a conceptual diagram of a training system according to an embodiment of the present invention.
2 is a conceptual diagram illustrating the principle of removing ionic substances in the CDI method.
3 is a conceptual diagram illustrating a principle of regenerating an electrode in the CDI method.
4 is a conceptual diagram illustrating a situation in which soft water is provided by controlling the filter units configured in parallel of the soft water system according to an embodiment of the present invention, but the regeneration water is drained.
5 is a conceptual diagram illustrating a situation in which soft water is provided by controlling filter units configured in parallel of the softening system according to an embodiment of the present invention, but recycled water is recovered.
6 is a conceptual diagram illustrating a situation in which soft water is provided by controlling filter units configured in parallel of a soft water system according to another embodiment of the present invention, but recycled water is recovered and drained.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

1 is a conceptual diagram of a softening system 1 according to an embodiment of the present invention.

Referring to the drawings, the soft water system 1 according to an embodiment of the present invention includes filter units 11 and 12 , supply passages 21 and 22 , discharge passages 31 and 32 , and a recovery passage portion 50 . includes The softening system 1 according to an embodiment of the present invention includes the discharge valves 310 and 320, the drain passages 41 and 42, the drain valves 410 and 420, the water source passage 60, the water source valve 600, It may further include a demand flow path 70 , a flow rate acquisition unit 80 , and a processor (not shown).

Supply flow path (21, 22)

The supply passages 21 and 22 are passages provided to supply raw water to the filter units 11 and 12 . The supply passages 21 and 22 may be formed in plurality and arranged in parallel. In one embodiment of the present invention, it is illustrated that the supply flow passages 21 and 22 are formed in a total of two so that the first supply passage 21 and the second supply passage 22 are arranged in parallel, but the supply passages 21 and 22 ) configuration is not limited thereto.

Each of the supply passages (21, 22) connects the water source and the filter units (11, 12), respectively. The first supply passage 21 may be connected to the first filter unit 11 , and the second supply passage 22 may be connected to the second filter unit 12 . Here, the meaning of connecting includes a case of direct connection and a case of indirectly connecting through other components. Accordingly, as illustrated, the water source and the supply flow passages 21 and 22 may be connected in such a way that the respective supply passages 21 and 22 are connected to and branched from the water source passage 60 connected to the water source. In order to transmit raw water including at least one of water and regeneration water provided from a water source to the filter units 11 and 12 , each of the supply passages 21 and 22 may be formed in the shape of a tube with an empty interior. A water source valve 600 is formed in the water source flow path 60 to determine opening and closing of the flow path.

The first and second supply passages 21 and 22 may be connected to first and second upstream recovery passages 51 and 52 included in a recovery passage part 50 to be described later, respectively. That is, the first supply passage 21 is connected to the second recovery passage parts 51 , 54 , 55 through the first upstream recovery passage 51 , and the second supply passage 22 is connected to the second upstream recovery passage 52 . ) may be connected to the first recovery passage parts 52 , 53 , 55 .

Discharge flow path (31, 32)

The discharge passages 31 and 32 are passages provided to discharge soft or regenerated water from the filter units 11 and 12 . Since the filter units 11 and 12 may be composed of two, the discharge passages 31 and 32 may also be configured in a corresponding number and may be connected to each other. That is, the first discharge passage 31 may be connected to the first filter unit 11 , and the second discharge passage 32 may be connected to the second filter unit 12 . In one embodiment of the present invention, the discharge passages 31 and 32 are formed in a total of two so that the first discharge passage 31 and the second discharge passage 32 are arranged in parallel, but the discharge passages 31 and 32 ) configuration is not limited thereto.

The discharge valves 310 and 320 are components disposed in the respective discharge passages 31 and 32 to control the opening and closing of the discharge passages 31 and 32, and as the opening degree is adjusted, the discharge passages 31 and 32 are closed. can be open or closed. When the discharge passages 31 and 32 are closed by the discharge valves 310 and 320 , water is not transmitted to the consumer through the closed discharge passages 31 and 32 . When the discharge passages 31 and 32 are opened by the discharge valves 310 and 320 , water is delivered to the consumer through the open discharge passages 31 and 32 , or through the drain passages 41 and 42 to be described later. may be discharged or recovered. In order for the water provided from the filter units 11 and 12 to flow, each of the discharge passages 31 and 32 may be formed in the shape of a tubular body with an empty interior.

At least one of the discharge valves 310 , 320 may be controlled by the processor to remain open during operation of the softening system 1 . At this time, the discharge valves 310 and 320 that maintain the open state may be discharge valves 310 and 320 disposed in the discharge passages 31 and 32 connected to the filter units 11 and 12 that perform the removal mode. . Therefore, even while any one of the filter units 11 and 12 is performing the regeneration mode, the soft water discharged from the filter units 11 and 12 performing the removal mode may be delivered to the demanding party.

As illustrated, the demand source and the discharge flow passages 31 and 32 may be connected in such a way that the respective discharge flow paths 31 and 32 are connected to the demand source flow path 70 connected to the demand source and merged. A flow rate acquisition unit 80 to be described later may be disposed in the demand flow path 70 .

recovery passage (50)

The recovery passage unit 50 is a component for recovering and providing the regeneration water discharged from the filter units 11 and 12 performing the regeneration mode to the other filter units 11 and 12 .

The recovery passage part 50 may include first recovery passage parts 52 , 53 , 55 and second recovery passage parts 51 , 54 , 55 . The first recovery passage portions 52 , 53 , 55 are disposed to guide at least a part of the regenerated water in the first discharge passage 31 to the second supply passage 22 , and the regenerated water in the second discharge passage 32 is disposed. The second recovery passage parts 51 , 54 and 55 may be disposed to guide at least a portion of the first supply passage 21 . To enable their respective actions, the first recovery passage parts 52 , 53 and 55 may be connected to the first discharge passage 31 and the second supply passage 22 , and the second recovery passage parts 51 , 54 , 55 may be connected to the second discharge flow path 32 and the first supply flow path 21 .

The first recovery passage parts 52 , 53 , and 55 and the second recovery passage parts 51 , 54 , 55 may share a common recovery passage 55 . The first recovery passage parts 52 , 53 , and 55 may include a first downstream recovery passage 53 , a common recovery passage 55 , and a second upstream recovery passage 52 , and the second recovery passage part 51 . , 54 and 55 may include a second downstream recovery passage 54 , a common recovery passage 55 , and a first upstream recovery passage 51 .

The first upstream recovery passage 51 and the second upstream recovery passage 52 may connect the common recovery passage 55 to the first supply passage 21 and the second supply passage 22 , respectively. The first downstream recovery passage 53 and the second downstream recovery passage 54 may connect the common recovery passage 55 to the first discharge passage 31 and the second discharge passage 32 , respectively. Regenerated water flowing into the common recovery passage 55 through the downstream recovery passages 53 and 54 from each of the discharge passages 31 and 32 passes through the upstream recovery passages 51 and 52 to the respective supply passages 21 and 22 In the manner of being delivered to the , recovery of the regeneration water can be made.

Various recovery valves may be disposed to open and close the recovery passage unit 50 . Specifically, a first upstream recovery valve 510 and a second upstream recovery valve 520 may be disposed in the first upstream recovery passage 51 and the second upstream recovery passage 52 , respectively. A first downstream recovery valve 530 and a second downstream recovery valve 540 may be disposed in the first downstream recovery passage 53 and the second downstream recovery passage 54 , respectively.

The first downstream recovery valve 530 and the second downstream recovery valve 540 may be check valves allowing only flow from the first discharge flow path 31 or the second discharge flow path 32 to the common recovery flow path 55 . there is. The first downstream recovery valve 530 and the second downstream recovery valve 540 allow only the flow of water to the common recovery flow path 55 , and conversely, water flows from the common recovery flow path 55 to the respective discharge flow paths 31 and 32 . By blocking the reverse flow, it is possible to prevent the regeneration water from flowing back into the filter units 11 and 12 through the outlet ends of the filter units 11 and 12 or from being discharged to the consumer through the discharge passages 31 and 32. .

A pump 550 may be disposed in the recovery passage part 50 to pump reclaimed water. The pump 550 may be a constant flow rate pump 550 that pressurizes the regeneration water at a limit flow rate greater than a limit flow rate that can be discharged through any one of the first and second drain valves 410 and 420 to be described later. The direction in which the pump 550 pumps water is a direction from the discharge flow passages 31 and 32 side to the supply flow passages 21 and 22 side.

Filter units (11, 12)

The filter units 11 and 12 are components that remove ionic substances in raw water to generate soft water. The filter units 11 and 12 are provided in the supply passages 21 and 22, respectively, and remove at least a portion of the ionic material contained in the supplied raw water by electrical force, containing less ionic material than the raw water. training can be discharged. This operating state may be referred to as a removal mode. The filter units 11 and 12 may discharge the ionic substances collected during the removal mode together with the supplied raw water, thereby discharging the regenerated water containing more ionic substances than the raw water. This operating state may be referred to as a regeneration mode. The filter units 11 and 12 may selectively perform any one of a removal mode and a regeneration mode. The filter units 11 and 12 may be configured in plurality, and in one embodiment of the present invention, it has been described that the two filter units 11 and 12 of the first and second filter units 11 and 12 are disposed. , the configuration is not limited thereto.

The filter units 11 and 12 may remove ionic substances in an electro-deionization method. More specifically, there is an electric deionization method among the methods of removing the ionic material. When a DC voltage is applied to the charged particles in the electrolyte, the positively charged particles move to the cathode, and the negatively charged particles move to the anode. This is called electrophoresis. Electrodeionization refers to a method of selectively adsorbing or moving ions (ionic substances) in water through electrodes or ion exchange membranes based on the principle of electric force (electrophoresis) to remove them.

Electrodeionization methods include methods such as ED (Electrodialysis), EDI (Electro Deionization), CEDI (Continuous Electro Deionization), and CDI (Capacitive Deionization). The filter units 11 and 12 of the ED system include an electrode and an ion exchange membrane. And the EDI filter units 11 and 12 are provided with an electrode, an ion exchange membrane, and an ion exchange resin. On the other hand, the filter units 11 and 12 of the CDI type do not include either an ion exchange membrane or an ion exchange resin, or do not include an ion exchange resin.

The filter units 11 and 12 according to an exemplary embodiment of the present invention may remove ionic materials by a capacitive deionization (CDI) method among electric deionization methods. The CDI method refers to a method of removing ions using the principle that ions (or ionic substances) are adsorbed and desorbed from the surface of the electrode by electrical force.

2 is a conceptual diagram illustrating the principle of removing ionic substances in the CDI method. 3 is a conceptual diagram illustrating a principle of regenerating an electrode in the CDI method.

The removal mode and the reproduction mode of the CDI method will be described with further reference to FIGS. 2 and 3 . As shown in FIG. 2 , when water containing ions passes between the electrodes in a state in which a voltage is applied to the electrodes, anions move to the anode and cations move to the cathode. That is, adsorption occurs. This adsorption can remove ions from the water. In this way, the mode in which the filter units 11 and 12 removes ions (ionic substances) in the water passing through the filter units 11 and 12 through the electrode is called a removal mode.

However, the adsorption capacity of the electrode is limited. Therefore, if the adsorption continues, the electrode reaches a state in which it can no longer adsorb ions. To prevent this, it is necessary to regenerate the electrode by desorbing the ions adsorbed to the electrode. To this end, as shown in FIG. 3 , a voltage opposite to that in the removal mode may be applied to the electrode, or a voltage may not be applied. A mode in which the filter units 11 and 12 regenerate the electrodes in this way is referred to as a regeneration mode. The regeneration mode may be performed before or after the removal mode.

Thus, for this action, the filter units 11 , 12 can include electrodes. The filter units 11 and 12 may selectively perform any one of a removal mode in which ionic substances are removed by an electric deionization method through an electrode and a regeneration mode in which the electrode is regenerated. Therefore, when raw water is supplied to the filter units 11 and 12, in the removal mode, at least a portion of the ionic substances in the raw water are removed to generate soft water, and the filter units 11 and 12 are discharged, and in the regeneration mode, the ions possessed by the electrodes are discharged. The filter units 11 and 12 may discharge water having an increased content of ionic substances by providing the ionic substances to the raw water.

The filter units 11 and 12 are connected to the supply passages 21 and 22 and the drain passages 41 and 42 as described above, and receive water through the supply passages 21 and 22, and the drain passages 41, 42), the treated water can be discharged. The filter units 11 and 12 may be provided with raw water including at least one of water and regenerated water delivered from a water source. Recycled water can be generated and discharged.

Drainage passages (41, 42)

The drain passages 41 and 42 are components connected to the discharge passages 31 and 32 to drain the water in the discharge passages 31 and 32 to the outside. Accordingly, the drain passages 41 and 42 may also be formed in a tubular shape with an empty interior so that the fluid can flow like the discharge passages 31 and 32 .

The drain passages 41 and 42 may be disposed in the discharge passages 31 and 32, respectively. Therefore, in the exemplary embodiment of the present invention, since the discharge passages 31 and 32 include the first discharge passage 31 and the second discharge passage 32 , the drain passages 41 and 42 are also the first drain passages 41 . ) and a second drain passage 42 , the first drain passage 41 may be connected to the first discharge passage 31 , and the second drain passage 42 may be connected to the second discharge passage 32 . there is.

Water passing through the filter units 11 and 12 may be discharged through the drain passages 41 and 42 . In particular, when the filter units 11 and 12 are operating in the regeneration mode, the regeneration water discharged through the discharge passages 31 and 32 may be drained to the outside through the drain passages 41 and 42 and discarded.

However, such water is not always discharged, and whether it is discharged or not can be controlled. Accordingly, drain valves 410 and 420 may be provided in the drain passages 41 and 42 to open and close the drain passages 41 and 42 , respectively. In an embodiment of the present invention, since the drain passages 41 and 42 include the first drain passage 41 and the second drain passage 42 , the first drain valve 410 is provided in the first drain passage 41 . , a second drain valve 420 may be disposed in the second drain passage 42 .

The drain valves 410 and 420 may be constant flow valves provided to discharge water at a predetermined flow rate.

Flow rate acquisition unit (80)

The flow rate acquisition unit 80 is a component that acquires the flow rate of water delivered to the consumer, that is, the flow rate of water used by the user. The flow rate acquisition unit 80 is provided to acquire the total flow rate of soft water discharged by the first discharge flow path 31 and the second discharge flow path 32 . Accordingly, the flow rate acquisition unit 80 is disposed in the demand flow path 70 to obtain the flow rate of water passing through the demand flow path 70 . The flow rate acquisition unit 80 may acquire the flow rate of water delivered to the demander using a Kalman vortex method, a method using the Doppler effect, or the like, but the method for obtaining the flow rate is not limited thereto.

The flow rate acquisition unit 80 is connected to the processor, and transmits the acquired flow rate to the processor. The processor may control opening and closing of each valve according to the received flow rate. In addition, the processor may control the operation of the pump 550 based on the received flow rate, and may determine the operating state of the filter units 11 and 12 .

processor

The processor is a component including an element capable of performing a logical operation for performing a control command, and may include a central processing unit (CPU) or the like. The processor is connected to components such as the filter units 11 and 12 and the discharge valves 310 and 320 to transmit a signal according to the control command to each component, and is connected to various sensors or acquisition units to obtain information can be transmitted in the form of a signal. Accordingly, in one embodiment of the present invention, the processor may be electrically connected to the valves included in the softening system 1 , the filter units 11 and 12 , the flow rate acquisition unit 80 , and the pump 550 . Since the processor may be electrically connected to each of the components, it may be connected with a wire or may further have a communication module capable of communicating wirelessly to communicate with each other.

The training system 1 may further include a storage medium, so that the control commands performed by the processor are stored in the storage medium and utilized. The storage medium may be a device such as a hard disk drive (HDD), a solid state drive (SSD), a server, a volatile medium, a non-volatile medium, and the like, but the type is not limited thereto. In addition to this, the storage medium may further store data necessary for the processor to perform a task.

A method for the processor to control the training system 1 will be described with reference to FIGS. 4 and 5 . 4 is a conceptual diagram illustrating a situation in which soft water is provided by controlling the filter units 11 and 12 configured in parallel of the soft water system 1 according to an embodiment of the present invention, but the regenerated water is drained. 5 is a conceptual diagram illustrating a situation in which soft water is provided by controlling the filter units 11 and 12 configured in parallel of the softening system 1 according to an embodiment of the present invention, but the regenerated water is recovered.

It is assumed that the first filter unit 11 performs the removal mode and the second filter unit 12 performs the regeneration mode. However, this is for convenience of description, and when the second filter unit 12 performs the removal mode, the filter units 11 and 12 may operate in such a way that the first filter unit 11 performs the regeneration mode, , At this time, the water flow and the operating state of the valve are also changed to correspond so that the softening system 1 can be operated.

As shown in FIG. 5 , at least a portion of the regenerated water discharged from the second filter unit 12 through the second discharge passage 32 is transferred to the first supply passage ( 21) can be controlled to be supplied. Soft water discharged from the first filter unit 11 is discharged to a demand destination through the first discharge flow path 31 , and the regenerated water discharged from the second filter unit 12 to the second discharge flow path 32 is a second recovery flow path It may be delivered to the first filter unit 11 together with the water provided from the water source through the parts 51 , 54 , 55 and the first supply passage 21 . Accordingly, the first filter unit 11 receives the recovered regenerated water together with the water provided from the water source and removes the ionic material to discharge the soft water, so the recovery rate can be increased.

The processor controls so that the first discharge valve 310 and the first upstream recovery valve 510 are opened and the second discharge valve 320 and the second upstream recovery valve 520 are closed so that this water flow occurs. can Also, the processor may control the first drain valve 410 and the second drain valve 420 to close so that no water is drained. The second discharge valve 320 and the second upstream recovery valve 520 may be closed to prevent the regeneration water from being delivered to a demanding destination or re-introduced into the second filter unit 12 .

The processor controls the regeneration water to be drained through the second drain passage 42 as shown in FIG. 4 for a predetermined time after the second filter unit 12 starts the regeneration mode, and continues until the regeneration mode ends after the predetermined time. 5 , the regeneration water may be controlled to be supplied to the first supply passage 21 .

In the initial stage when the filter units 11 and 12 operate in the regeneration mode, a large amount of ionic substances included in the filter units 11 and 12 are discharged together with water, so that the total dissolved solids (TDS) of the regeneration water is If it is too high and is recovered and used for the use of soft water, the quality of the soft water may be impaired. Therefore, the initially generated regeneration water needs to be drained instead of recovered.

However, after a predetermined time elapses after the filter units 11 and 12 start to operate in the regeneration mode, since the TDS of the recycled water is sufficiently low, the recycled water may be recovered and used for soft water. Therefore, after a predetermined period of time, the drainage is stopped and collected, so that the recovery rate can be increased.

The above predetermined time may be a time from the time when the regeneration mode is executed to the time when the TDS of the regeneration water becomes less than three times the TDS of the water provided from the water source. In addition, the water softening system 1 of the present invention further includes a TDS acquisition unit (not shown) that is capable of acquiring TDS in each of the discharge passages 31 and 32 and is further electrically connected to the processor, so that the obtained TDS is obtained from the water source. The processor may control each valve so that drainage occurs when the TDS of the supplied water is 3 times or more, and recovery occurs when it is less than 3 times the TDS.

In order to generate such a flow of water, the processor opens the first discharge valve 310 and the second drain valve 420 so that the regeneration water is drained for a predetermined time after the second filter unit 12 starts the regeneration mode. The first and second upstream recovery valves 510 and 520 and the first drain valve 410 may be controlled to be closed. In addition, the processor performs the first discharge so that the regeneration water is supplied to the first supply passage 21 through the second recovery passage parts 51 , 54 , 55 after a predetermined time after the second filter unit 12 starts the regeneration mode. The valve 310 and the first upstream recovery valve 510 are open, and the second discharge valve 320, the second upstream recovery valve 520, and the first and second drain valves 410 and 420 are closed. can be controlled as much as possible. That is, in the initial stage, the processor closes all the first and second upstream recovery valves 510 and 520 so that recovery does not occur, and opens the second drain valve 420 to cause drainage.

The processor may control the pump 550 to operate when the flow rate of the soft water obtained by the flow rate acquisition unit 80 is greater than a predetermined critical flow rate, and not to operate when the flow rate is less than or equal to the critical flow rate. Here, the critical flow rate may be greater than or equal to the critical flow rate that the pump 550 has when the constant flow pump 550 is the same. When the pump 550 tries to pump a flow rate higher than the flow rate of the soft water that the user wants to use, the water is not delivered directly from the water source to the first filter unit 11 that performs the removal mode, but rather the supply flow path 21 from the water source. . The processor may perform the above control so that the regenerated water recovered with respect to the water provided from the water source is mixed while maintaining an appropriate ratio and provided to the first filter unit 11 to produce good quality soft water.

The processor may control the pump 550 so that the amount of regeneration water provided to the first filter unit 11 is 30% to 40% of the amount of soft water discharged from the first filter unit 11 . there is.

The drain valves 410 and 420 may be constant flow valves having a predetermined limit flow rate, and the pump 550 may be a constant flow rate pump 550 that pumps water at a flow rate greater than the predetermined limit flow rate. Therefore, as the pump 550 is operated, a flow rate greater than the flow rate passing through the second filter unit 12 in general may pass through the second filter unit 12 and may be recovered by lowering the TDS of the regenerated water. Since the TDS of the recovered regenerated water is lowered, the quality of soft water generated through the first filter unit 11 may be improved while increasing the recovery rate.

The processor may perform the reverse control of each valve and filter unit 11 , 12 . Specifically, soft water is provided as shown in FIG. 4 and the regeneration water is drained, but as opposed to in FIG. 4 , when the first filter unit 11 performs the regeneration mode and the second filter unit 12 performs the removal mode, the processor The second discharge valve 320 may be opened, and the first discharge valve 310 , the first upstream recovery valve 510 , and the second upstream recovery valve 520 may be controlled to be closed. In addition, the processor may control the first drain valve 410 to be opened and the second drain valve 420 to be closed so that drainage is performed through the first drain passage 41 . As shown in FIG. 5, when the regeneration water is recovered, the first filter unit 11 performs the regeneration mode and the second filter unit 12 performs the removal mode as opposed to in FIG. 5, the processor operates the second discharge valve 320 and The second upstream recovery valve 520 may be opened, and the first discharge valve 310 and the first upstream recovery valve 510 may be controlled to be closed. Also, the processor may control the first drain valve 410 and the second drain valve 420 to close so that no water is drained.

another embodiment

6 is a conceptual diagram illustrating a situation in which soft water is provided by controlling the filter units 11 and 12 configured in parallel of the softening system 2 according to another embodiment of the present invention, but recycled water is recovered and drained. The softening system 2 according to another embodiment of the present invention includes a first drain valve 410b, a second drain valve 420b, a first upstream recovery valve 510b, a second upstream recovery valve 520b, and a second drain valve 410b. The first downstream recovery valve 530b, the second downstream recovery valve 540b and its control through the processor have some differences from the softening system 1 according to an embodiment of the present invention, and are the same in other parts, so Except for a difference to be described, the description of the softening system 1 according to one embodiment is applied to the softening system 2 according to another embodiment.

As shown in FIG. 6 , in the processor, a portion of the regeneration water discharged from the second filter unit 12 through the second discharge passage 32 is transferred to the first supply passage 21 through the second recovery passage parts 51 , 54 and 55 . ) and the remaining part of the regenerated water discharged through the second discharge passage 32 may be controlled to be drained through the second drain passage 42 . Soft water discharged from the first filter unit 11 is discharged to a demand destination through the first discharge passage 31 , and a part of the regeneration water discharged from the second filter unit 12 to the second discharge passage 32 is Regenerated water may be delivered to the first filter unit 11 together with the water provided from the water source through the recovery passage parts 51 , 54 , 55 and the first supply passage 21 , and discharged to the second discharge passage 32 . A portion of the remaining may be discarded through the second drain passage 42 . That is, the regeneration water discharged through the second discharge passage 32 is distributed to the second recovery passage portions 51 , 54 , 55 and the second drain passage 42 , respectively.

In order to generate such a flow of water, the processor may adjust the opening degrees of the first upstream recovery valve 510b and the second drain valve 420b to be at least partially open within a range that is not completely closed. Accordingly, a portion of the regeneration water discharged to the second discharge passage 32 passes through the first upstream recovery valve 510b and is provided to the first filter unit 11, and the remaining portion is drained through the second drain valve 420b. can be That is, the processor controls the opening degree of the first upstream recovery valve 510b and the second drain valve 420b, and the regenerated water discharged into the second recovery passages 51 , 54 , 55 and the second drain passage 42 , respectively. flow rate can be adjusted. The processor may control the second discharge valve 320b and the second upstream recovery valve 520b to be closed, thereby preventing the regeneration water from being delivered to a consumer or re-introduced into the second filter unit 12 .

To enable the above-described control by the processor, at least one of the first upstream recovery valve 510b, the second upstream recovery valve 520b, the first drain valve 410b, and the second drain valve 420b may adjust the opening degree. It may be a flow control valve capable of controlling the flow rate through the A solenoid valve or the like may be used as the flow control valve, but the type is not limited thereto.

Since the first downstream recovery valve 530b and the second downstream recovery valve 540b are also disposed in each recovery passage, they may be check valves and valves capable of controlling the flow rate through opening control. The processor may further adjust the flow rate of the recovered regenerated water by controlling the opening degrees of the first downstream recovery valve 530b and the second downstream recovery valve 540b.

At least one of the second upstream recovery valve 520b, the first downstream recovery valve 530b, and the first drain valve 410b may be a flow rate control valve. Through this, water discharged through the first filter unit 11 may be distributed to the first drain passage 41 and the first recovery passage parts 51 , 54 , and 55 .

At least one of the first upstream recovery valve 510b, the second downstream recovery valve 540b, and the second drain valve 420b may be a flow rate control valve. Through this, water discharged through the second filter unit 12 may be distributed to the second drain passage 42 and the second recovery passage portions 52 , 53 , and 55 .

In another embodiment of the present invention, the processor may reverse the control of each valve and filter unit 11 and 12 .

In the above, even though it has been described that all components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1, 2: Training system
11: first filter unit
12: second filter unit
21: first supply flow path
22: second supply flow path
31: first discharge flow path
32: second discharge flow path
41: first drain flow path
42: second drain flow path
50: recovery passage part
51: first upstream recovery passage
52: second upstream recovery passage
53: first downstream recovery passage
54: second downstream recovery passage
55: common recovery path
60: Suwon Euro
70: Demand source Euro
80: flow rate acquisition unit
310: first discharge valve
320: second discharge valve
410, 410b: first drain valve
420, 420b: second drain valve
510, 510b: first upstream recovery valve
520, 520b: second upstream return valve
530, 530b: the first downstream recovery valve
540, 540b: second downstream return valve
550: pump
600: water source valve

Claims (12)

A removal mode for discharging soft water containing less ionic substances than the raw water by removing at least a portion of the ionic substances contained in the supplied raw water based on electrical force, and the ionic substances collected during the removal mode first and second filter units selectively performing any one of the regeneration modes for discharging together with the supplied raw water and discharging the recycled water containing more ionic substances than the raw water;
first and second supply passages provided to supply the raw water to the first and second filter units, respectively;
first and second discharge passages provided to discharge the soft water or the regenerated water from the first and second filter units, respectively;
a first recovery passage for guiding at least a portion of the regenerated water in the first discharge passage to the second supply passage; and
and a second recovery passage for guiding at least a portion of the regenerated water in the second discharge passage to the first supply passage. According to claim 1,
Further comprising a processor electrically connected to the first and second filter units,
When the first filter unit performs the removal mode and the second filter unit performs the regeneration mode,
The processor;
at least a portion of the regeneration water discharged from the second filter unit through the second discharge passage is controlled to be supplied to the first supply passage through the second recovery passage portion. 3. The method of claim 2,
first and second discharge valves respectively disposed in the first and second discharge passages to open and close the flow passages;
a first upstream recovery valve disposed in the second recovery flow passage to open and close the flow passage; and
Further comprising a second upstream recovery valve disposed in the first recovery flow passage for opening and closing the flow passage,
wherein the processor is further electrically connected to the first and second discharge valves and the first and second upstream recovery valves;
The processor is configured such that the first discharge valve and the first upstream recovery valve are opened such that the regeneration water is supplied from the second discharge passage to the first supply passage through the second recovery passage part, and controlling the second upstream return valve to be closed. 4. The method of claim 3,
first and second drain passages respectively connected to the first and second discharge passages for draining the regeneration water; and
Further comprising first and second drain valves respectively disposed in the first and second drain passages to open and close the passage,
wherein the processor is further electrically connected to the first and second drain valves;
The processor is configured to supply a portion of the regenerated water from the second discharge passage to the first supply passage through the second recovery passage, and to drain the remaining portion of the regeneration water from the second discharge passage through the second drain passage. , the first discharge valve is opened, the second discharge valve and the second upstream recovery valve are closed, and the first upstream recovery valve and the second drain valve are controlled to be at least partially opened. 3. The method of claim 2,
Further comprising first and second drain passages respectively connected to the first and second discharge passages to drain the regeneration water;
The processor is:
controlling the regeneration water to be drained through the second drain passage for a predetermined time after the second filter unit starts the regeneration mode;
Controlling the regeneration water to be supplied to the first supply flow path from after the predetermined time until the regeneration mode is terminated, the soft water system. 5. The method of claim 4,
first and second drain valves respectively disposed on the first and second drain passages to open and close the passage;
first and second discharge valves respectively disposed in the first and second discharge passages to open and close the flow passages;
a first upstream recovery valve disposed in the second recovery flow passage to open and close the flow passage; and
Further comprising a second upstream recovery valve disposed in the first recovery flow passage for opening and closing the flow passage,
the processor is further electrically connected to the first and second drain valves, the first and second drain valves, and the first and second upstream recovery valves;
The processor is:
The first discharge valve and the second drain valve are opened such that the regeneration water is drained for a predetermined time after the second filter unit starts the regeneration mode, the first and second upstream recovery valves; the drain valve is controlled to close,
After a predetermined time after the second filter unit starts the regeneration mode, the first discharge valve and the first upstream recovery valve are opened so that the regeneration water is supplied to the first supply passage through the second recovery passage part. , the second discharge valve, the second upstream recovery valve, and the first and second drain valves are controlled to be closed. 3. The method of claim 2,
Further comprising a pump disposed in the second recovery passage portion to pump the regeneration water,
wherein the processor is further electrically connected to the pump. 8. The method of claim 7,
Further comprising a flow rate acquisition unit provided to obtain a total flow rate of the soft water discharged by the first discharge passage and the second discharge passage,
The processor is further electrically connected to the flow rate acquisition unit,
The processor operates when the flow rate of the soft water obtained by the flow rate acquisition unit is greater than a predetermined critical flow rate, and controls the pump to not operate when the flow rate is less than or equal to the critical flow rate, the soft water system. 8. The method of claim 7,
first and second drain passages respectively connected to the first and second discharge passages for draining the regeneration water; and
Further comprising first and second drain valves which are constant flow valves respectively disposed in the first and second drain passages to open and close the passage,
wherein the pump is a constant flow pump that pressurizes the regeneration water at a flow rate greater than a limit flow rate that can be discharged through the second drain valve. 8. The method of claim 7,
The processor controls the pump so that the amount of the regeneration water provided to the first filter unit is 30% to 40% of the amount of the soft water discharged from the first filter unit. According to claim 1,
The first recovery passage part and the second recovery passage part share a common recovery passage,
The first recovery passage includes a first downstream recovery passage connecting the common recovery passage and the first discharge passage,
The second recovery passage includes a second downstream recovery passage connecting the common recovery passage and the second discharge passage,
first and second downstream recovery valves respectively disposed in the first downstream recovery passage and the second downstream recovery passage to allow only a flow from the first discharge passage or the second discharge passage to the common recovery passage; Including, training system. According to claim 1,
The filter unit selectively performs any one of a removal mode for removing the ionic material by an electric deionization method through an electrode, and a regeneration mode for regenerating the electrode, the soft water system.

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