JP2018201664A - Water treatment equipment - Google Patents

Abstract

To provide water treatment equipment in which a utilization mode of a water softening machine is improved.SOLUTION: Water treatment equipment includes a raw water tank for storing raw water, a pre-treatment unit for subjecting the raw water supplied from the raw water tank to pre-treatment, and an RO module for separating the raw water into RO water and RO drain using a reverse osmosis membrane for the raw water subjected to the pre-treatment by the pre-treatment unit. The pre-treatment unit includes a water softening machine path including a water softening machine, a water softening machine bypass path that bypasses the water softening machine, a water softening machine flow valve for controlling flow of the raw water in the water softening machine path, a water softening machine bypass valve for controlling the flow of the raw water in the water softening machine bypass path, a first pressure sensor for detecting a pressure at an entrance side of the water softening machine in the water softening machine path, and a control part for automatically controlling the water softening machine flow valve and the water softening machine bypass valve based on a detection value of the first pressure sensor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water treatment apparatus for producing artificial dialysis water and the like used for dialysis treatment.

  A conventional water device for artificial dialysis will be described with reference to FIG. As shown in FIG. 2, artificial dialysis water is typically produced from raw water which is tap water or well water.

  The raw water is first stored in the raw water tank 51. A heating heater 51h is provided inside the raw water tank 51, and warms the temperature of the raw water to 25 ° C. This is because if the temperature of the raw water is lower than 25 ° C., the silica component or the like in the raw water may precipitate in the subsequent apparatus, causing a problem.

The raw water heated to 25 ° C. is then sent to the pretreatment unit 53 by the raw water pump 52. The pretreatment unit 53 includes a prefilter 53a, a water softener 53b, and a carbon filter 53c in this order. The prefilter 53a mainly filters impurities (dust) in the raw water, the water softener 53b mainly removes calcium ions (Ca ²⁺ ) and magnesium ions (Mg ²⁺ ) in the raw water, and the carbon filter 53c Residual chlorine (such as HClO) in raw water is mainly removed.

  The raw water that has undergone the pretreatment in the pretreatment unit 53 is sent to the RO unit 54 (reverse osmosis membrane treatment apparatus). The RO unit 54 supplies the raw water that has been pretreated into the RO module 54m using the RO pump 54p. The RO module 54m removes all inorganic ions contained in the raw water. The RO water (about 15 to 48% of raw water) that has been processed in the RO module 54m is sent to the RO water supply unit 55, and the RO wastewater generated by the processing in the RO module 54m is partially (raw water). 5% to 80% (also called “circulated water”) is reintroduced into the RO module 54m via the RO pump 54p, and another part (about 5 to 48% of raw water, also called “concentrated water”) Wastewater treatment.

  The RO water supply unit 55 has an RO water tank 55t in which RO water is stored. A UV irradiation device 55u is provided in the RO water tank 55t so that the UV irradiation processing can be performed on the RO water. The RO water tank 55t is provided with an air filter 55f in order to remove floating bacteria and dust in the external air that flows in depending on the change in the RO water level in the RO water tank 55t.

  The RO water stored in the RO water tank 55t is sent to the UF 57 (ultra filter, also called “ultrafiltration membrane”) via the water pump 56. UF57 removes biological impurities from RO water. The RO water from which biological impurities have been removed by the UF 57 is sent as dialysis water to various medical devices for dialysis treatment. Usually, in these medical devices, dialysis water is heated to around 36 ° C. and used for various dialysis treatments. The dialysis water returns to the UF 58 (ultra filter, also called “ultrafiltration membrane”) after circulation of the medical device, and is further returned to the RO water tank 55t.

  The artificial dialysis water production apparatus as shown in FIG. 2 has already been put into practical use and stably produces artificial dialysis water for dialysis treatment.

  In addition, Patent Document 1 proposes a method and a purification device that can efficiently remove DNA fragments derived from bacteria in water for artificial dialysis with simple equipment and operation.

JP 2010-279461

  The present applicant is a manufacturer who manufactures a water production apparatus for artificial dialysis shown in FIG. And this inventor has repeated earnest examination about further improving the water manufacturing apparatus for artificial dialysis of FIG. And it discovered that there exists room for improvement regarding the utilization aspect of the water softener 53b.

In the water softener 53b, the internal resin element (filtering element) is blocked due to the softening of the raw water (specifically, removal of calcium ions (Ca ²⁺ ) and magnesium ions (Mg ²⁺ ) in the raw water). It can happen.

  Usually, at night when raw water is not softened, a dedicated regenerator for regenerating the water softener 53b (removing the blockage of the resin elements inside the water softener 53b) is used. Inconvenience is prevented from occurring.

  However, the resin element may be clogged during the softening of the raw water depending on the environmental conditions of the place where the water treatment apparatus is installed and / or due to aging of the water softener 53b or the like. In such a case, the function of the RO unit 54 is stopped, thereby causing a delay in dialysis treatment.

  Here, providing the bypass path of the water softener 53b in advance is sometimes performed also in the conventional water treatment apparatus. However, when the water softener 53b is bypassed, a manual switching operation by the user is necessary.

  The present invention has been created based on the above findings. An object of the present invention is to provide a water production apparatus for artificial dialysis in which the use mode of a water softener is improved. Further, the RO water produced by the present invention is not limited to artificial dialysis water, and can also be used as instrument washing water, inspection water, hand washing water, dispensing water, and the like. That is, this invention is providing the water treatment apparatus with which the utilization aspect of the water softener was improved broadly.

  The present invention relates to a raw water tank in which raw water is stored, a pretreatment unit for pretreating raw water supplied from the raw water tank, and a reverse osmosis membrane for the raw water pretreated by the pretreatment unit. An RO module that separates raw water into RO water and RO drainage, and the pretreatment unit includes a water machine path including a water machine, a water machine bypass path that bypasses the water machine, and a water machine path. A water softener flow valve for controlling the flow of raw water, a water softener bypass valve for controlling the flow of raw water in the water softener bypass path, and a pressure on the inlet side of the water softener in the water softener path are detected. Water having a first pressure sensor and a control unit that automatically controls the water softener flow valve and the water softener bypass valve based on a detection value of the first pressure sensor. It is a processing device.

  According to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detected value of the first pressure sensor that detects the pressure on the inlet side of the water softener, whereby manual switching by the user is performed. Without requiring operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  For example, when the detected value of the first pressure sensor is a predetermined amount or more, for example, 0.2 MPa or more, the controller closes the water softener flow valve and opens the water softener bypass valve. . When the detection value of the first pressure sensor is a predetermined amount or more, for example, 0.2 MPa or more, since there is a high probability that a closed state exists in the water softener, the bypass function of the water softener is given priority to continue the water treatment. Can be used effectively.

  Alternatively, the present invention uses a raw water tank in which raw water is stored, a pretreatment unit that pretreats the raw water supplied from the raw water tank, and a reverse osmosis membrane for the raw water pretreated by the pretreatment unit. An RO module that separates the raw water into RO water and RO drainage, and the pretreatment unit includes a water machine path including a water machine, a water machine bypass path that bypasses the water machine, and the water machine A water softener flow valve for controlling the flow of raw water in the path, a water softener bypass valve for controlling the flow of raw water in the water softener bypass path, and a pressure on the outlet side of the water softener in the water softener path. A second pressure sensor to be detected; and a control unit that automatically controls the water softener flow valve and the water softener bypass valve based on a detection value of the second pressure sensor. It is a water treatment device.

  According to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detection value of the second pressure sensor that detects the pressure on the outlet side of the water softener, so that manual switching by the user is performed. Without requiring operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  For example, when the detected value of the second pressure sensor is less than a predetermined amount, for example, less than 0.07 MPa, the control unit closes the water softener flow valve and opens the water softener bypass valve. . When the detection value of the second pressure sensor is less than a predetermined amount, for example, less than 0.07 MPa, since there is a high probability that a closed state exists in the water softener, the bypass function of the water softener is given priority to continue the water treatment. Can be used effectively.

  Alternatively, the present invention uses a raw water tank in which raw water is stored, a pretreatment unit that pretreats the raw water supplied from the raw water tank, and a reverse osmosis membrane for the raw water pretreated by the pretreatment unit. An RO module that separates the raw water into RO water and RO drainage, and the pretreatment unit includes a water machine path including a water machine, a water machine bypass path that bypasses the water machine, and the water machine A carbon filter provided on the lower sulfurization side from the junction of the path and the water machine bypass path, a water machine flow valve for controlling the flow of the raw water in the water machine path, and the raw water in the water machine bypass path A water softener bypass valve for controlling the flow, a third pressure sensor for detecting the pressure on the outlet side of the carbon filter, and the water softener flow valve and the water softener based on the detected value of the third pressure sensor. A control unit for automatically controlling the bypass valve, a water treatment apparatus characterized in that it has a.

  According to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detection value of the third pressure sensor that detects the pressure on the outlet side of the carbon filter, so that the manual switching by the user is performed. Without requiring operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  For example, when the detected value of the third pressure sensor is less than a predetermined amount, for example, less than 0.02 MPa, the control unit closes the water softener flow valve and opens the water softener bypass valve. . When the detection value of the third pressure sensor is less than a predetermined amount, for example, less than 0.02 MPa, since there is a high probability that a closed state exists in the water softener, the bypass function of the water softener is given priority to continue the water treatment. Can be used effectively.

  Alternatively, the present invention uses a raw water tank in which raw water is stored, a pretreatment unit that pretreats the raw water supplied from the raw water tank, and a reverse osmosis membrane for the raw water pretreated by the pretreatment unit. An RO module that separates the raw water into RO water and RO drainage, and the pretreatment unit includes a water machine path including a water machine, a water machine bypass path that bypasses the water machine, and the water machine A carbon filter provided on the lower sulfurization side from the junction of the path and the water machine bypass path, a water machine flow valve for controlling the flow of the raw water in the water machine path, and the raw water in the water machine bypass path A water softener bypass valve that controls flow, a water flow sensor that detects a water flow rate on the outlet side of the carbon filter, and the water softener flow valve and the water softener filter based on a detection value of the water flow sensor. It is the water treatment device according to claim having a control unit for automatically controlling the path valve.

  According to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detected value of the water flow rate sensor for detecting the water flow rate on the outlet side of the carbon filter, whereby manual switching by the user is performed. Without requiring operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  For example, when the detected value of the water flow amount sensor is less than a predetermined amount, the control unit closes the water softener flow valve and opens the water softener bypass valve. When the detected value of the water flow rate sensor is less than the predetermined amount, since there is a high probability that a closed state exists inside the water softener, the bypass function of the water softener can be effectively used to give priority to the continuation of water treatment.

  Alternatively, the present invention uses a raw water tank in which raw water is stored, a pretreatment unit that pretreats the raw water supplied from the raw water tank, and a reverse osmosis membrane for the raw water pretreated by the pretreatment unit. An RO module that separates the raw water into RO water and RO drainage, and the pretreatment unit includes a water machine path including a water machine, a water machine bypass path that bypasses the water machine, and the water machine A water softener flow valve for controlling the flow of raw water in the path, a water softener bypass valve for controlling the flow of raw water in the water softener bypass path, and a pressure on the inlet side of the water softener in the water softener path. A first pressure sensor for detecting, a second pressure sensor for detecting a pressure on the outlet side of the water softener in the water softener path, a third pressure sensor for detecting a pressure on the outlet side of the carbon filter, and the carbon Phi A water flow amount sensor for detecting a water flow amount on the outlet side of the filter, and a detected value of at least one of the first pressure sensor, the second pressure sensor, the third pressure sensor, and the water flow amount sensor, A water treatment apparatus comprising: a water softener flow valve and a controller that automatically controls the water softener bypass valve.

  In each of the above inventions, it is preferable that a manual switch that can temporarily disable the automatic control function by the control unit is further provided.

  According to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detected value of the first pressure sensor that detects the pressure on the inlet side of the water softener, whereby manual switching by the user is performed. Without requiring operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  Alternatively, according to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detected value of the second pressure sensor for detecting the pressure on the outlet side of the water softener, so that the manual operation by the user is performed. Without requiring the switching operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  Alternatively, according to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detected value of the third pressure sensor that detects the pressure on the outlet side of the carbon filter, so that the manual operation by the user is performed. Without requiring the switching operation, the bypass of the water softener can be carried out in a minimum and timely manner.

  Alternatively, according to the present invention, the water softener flow valve and the water softener bypass valve are automatically controlled based on the detected value of the water flow rate sensor that detects the water flow rate on the outlet side of the carbon filter, so that the manual operation by the user is performed. Without requiring the switching operation, the bypass of the water softener can be carried out in a minimum and timely manner.

It is a schematic explanatory drawing of the water treatment apparatus which concerns on one Embodiment of this invention. It is a schematic explanatory drawing of the conventional water production apparatus for artificial dialysis.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic explanatory diagram of a water treatment apparatus according to an embodiment of the present invention. As shown in FIG. 1, the water treatment apparatus 10 of the present embodiment is heated in a raw water tank 11 in which raw water is stored and a heating heater 11 h for heating the raw water is provided, and in the raw water tank 11. A pretreatment unit 13 for pretreating the raw water, and a RO module 15m for separating the raw water into RO water and RO drainage using a reverse osmosis membrane (ROM) for the raw water pretreated by the pretreatment unit 13; It is equipped with.

  In this embodiment, tap water is used as raw water. Raw water which is tap water is stored in the raw water tank 11. The heating heater 11h is provided inside the raw water tank 11, and in this embodiment, the temperature of the raw water is heated to 25 ° C. This is because if the temperature of the raw water is lower than 25 ° C., the silica component or the like in the raw water may precipitate in the subsequent apparatus, causing a problem.

As shown in FIG. 1, raw water heated to 25 ° C. is sent to a pretreatment unit 13 by a raw water pump 12. The pretreatment unit 13 has a pre-filter 13a, a water softener 13b, and a carbon filter 13c in this order. The prefilter 13a mainly filters impurities (dust) in the raw water, and the water softener 13b mainly removes calcium ions (Ca ²⁺ ) and magnesium ions (Mg ²⁺ ) in the raw water. The carbon filter 13c mainly removes residual chlorine (such as HClO) in the raw water.

  The raw water after the pretreatment in the pretreatment unit 13 is sent to the RO unit 14 (reverse osmosis membrane treatment apparatus). The RO unit 14 uses the RO pump 14p to supply the raw water after the pretreatment into the RO module 14m. The RO module 14m is configured to remove all inorganic ions contained in the raw water. The RO water (about 15 to 48% of raw water) that has been processed in the RO module 14m is sent to the RO water supply unit 15, and the RO wastewater generated by the processing in the RO module 14m is A part (about 5 to 80% of the raw water, also called “circulated water”) is reintroduced into the RO module 14m via the RO pump 14p, and another part (5 to 48 of the raw water). % Is also called “concentrated water”).

  The RO water supply unit 15 has an RO water tank 15t in which RO water is stored. A UV irradiation device 15u is provided in the RO water tank 15t so that UV irradiation processing can be performed on the RO water. The RO water tank 15t is provided with an air filter 15f in order to remove floating germs and dust in the external air that flows in depending on the change in the RO water level in the RO water tank 15t.

  The RO water stored in the RO water tank 15t is sent to the UF 17 (ultrafilter, also called “ultrafiltration membrane”) via the water pump 16. UF17 is designed to remove biological impurities from RO water. The RO water from which biological impurities are removed by the UF 17 is sent to various medical devices (not shown) for dialysis treatment as dialysis water. In these medical devices, dialysis water is usually heated to 36 ° C. and used for various dialysis treatments. The dialysis water returns to the UF 18 (ultra filter, also called “ultrafiltration membrane”) after circulation of the medical device, and is further returned to the RO water tank 15t.

  The feature of the present embodiment is that it has a function of automatically bypassing the water softener 13b when the degree of the closed state of the water softener 13b is high and it is preferable to bypass the water softener 13b.

  For this function, the pretreatment unit 13 of this embodiment includes a water softener bypass path 31 that bypasses the water softener 13b in addition to the water softener path 21 including the water softener 13b. A branch portion between the water softener path 21 and the water softener bypass path 31 is located on the outlet side of the pre-filter 13a. The water softener path 21 is provided with a water softener flow valve 22 that controls the flow of raw water to the water softener path 21, and the water softener bypass path 31 is connected to the water softener bypass path 31. A water softener bypass valve 32 for controlling the flow of the raw water is provided. The water softener flow valve 22 of the present embodiment is provided on the downstream side of the branch portion between the water softener path 21 and the water softener bypass path 31 and on the upstream side of the water softener 13b.

  Moreover, the 1st pressure sensor 41 which detects the pressure of the said inlet side in the predetermined time interval is provided in the inlet side of the water machine 13b in the water machine path | route 21, and the water machine 13b in the water machine path | route 21 is provided. A second pressure sensor 42 for detecting the pressure on the outlet side at a predetermined time interval is provided on the outlet side of the carbon filter 13c. The pressure on the outlet side of the carbon filter 13c is set at a predetermined time interval. A third pressure sensor 43 for detecting is provided, and a water flow rate sensor 44 for detecting a water flow rate on the outlet side at a predetermined time interval is further provided on the outlet side of the carbon filter 13c.

  Based on the detected value of at least one of the first pressure sensor 41, the second pressure sensor 42, the third pressure sensor 43, and the water flow amount sensor 44, the water softener flow valve 22 and the water softener bypass valve 32 are connected. A control unit (not shown) for automatic control is provided.

  Specifically, when the detected value of the first pressure sensor 41 is a predetermined amount or more, for example, 0.2 MPa or more, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32. It is supposed to be.

  Further, when the detected value of the second pressure sensor 42 is less than a predetermined amount, for example, less than 0.07 MPa, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32. It has become.

  Further, when the detected value of the third pressure sensor 43 is less than a predetermined amount, for example, less than 0.02 MPa, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32. It has become.

  Further, when the detected value of the water flow rate sensor 44 is less than a predetermined amount, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32. (The predetermined amount in this case varies depending on the specifications of the water treatment device.)

  Next, the operation of the present embodiment will be described.

  As shown in FIG. 1, raw water that is, for example, tap water at 9 ° C. is stored in a raw water tank 11. And the heating heater 11h of the raw | natural water tank 11 heats the temperature of raw | natural water to 25 degreeC.

The raw water heated to 25 ° C. is sent to the pretreatment unit 13 by the raw water pump 12. In the pretreatment unit 13, the prefilter 13a mainly filters out impurities (dust) in the raw water, and the water softener 13b mainly uses calcium ions (Ca ²⁺ ) and magnesium ions (Mg ²⁺ ) in the raw water. The carbon filter 13c mainly removes chlorine ions (Cl ⁻ ) in the raw water.

  The raw water after the pretreatment in the pretreatment unit 13 is sent to the RO unit 14 (reverse osmosis membrane treatment device). The RO unit 14 supplies the raw water after the pretreatment into the RO module 14m using the RO pump 14p. The RO module 14m performs a process for removing all inorganic ions contained in the raw water, and the RO water (about 15 to 48% of the raw water) that has been processed in the RO module 14m is sent to the RO water supply unit 15. It is done.

  On the other hand, part of the RO wastewater generated by the processing in the RO module 14m (about 5 to 80% of raw water, also called “circulated water”) is reintroduced into the RO module 14m via the RO pump 14p. Another part (about 5 to 48% of raw water, also called “concentrated water”) is discharged.

  In the RO water supply unit 15, RO water is stored in the RO water tank 15t. If necessary, UV irradiation processing is performed by the UV irradiation device 15u.

  Thereafter, the RO water stored in the RO water tank 15t is sent to the UF 17 (ultra filter) via the water pump 16. UF17 removes biological impurities from RO water. The RO water from which biological impurities have been removed by the UF 17 is sent to various medical devices (not shown) for dialysis treatment, for example, as dialysis water. The dialysis water returns to the UF 18 (ultra filter) after circulating the medical device, and is further returned to the RO water tank 15t.

  In the present embodiment, during the operation of the water treatment apparatus 10, the first pressure sensor 41 on the inlet side of the water softener 13b in the water softener path 21 automatically detects the pressure on the inlet side at predetermined time intervals, The second pressure sensor 42 on the outlet side of the water softener 13b in the water softener path 21 automatically detects the pressure on the outlet side at a predetermined time interval, and the third pressure sensor 43 on the outlet side of the carbon filter 13c The outlet-side pressure is automatically detected at predetermined time intervals, and the outlet-side water flow sensor 44 of the carbon filter 13c automatically detects the outlet-side water passage at predetermined time intervals.

  Then, when the detected value of the first pressure sensor 41 is a predetermined amount or more, for example, 0.2 MPa or more, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32.

  When the detection value of the first pressure sensor 41 is a predetermined amount or more, for example, 0.2 MPa or more, there is a high probability that a closed state exists in the water softener 13b, but by the control of the control unit of the present embodiment, The bypass function of the water softener 13b can be automatically and effectively used, and water treatment can be continued stably.

  Alternatively, when the detection value of the second pressure sensor 42 is less than a predetermined amount, for example, less than 0.07 MPa, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32.

  Even when the detection value of the second pressure sensor is less than a predetermined amount, for example, less than 0.07 MPa, there is a high probability that a closed state exists in the water softener 13b, but by the control of the control unit of the present embodiment, The bypass function of the water softener 13b can be automatically and effectively used, and water treatment can be continued stably.

  Alternatively, when the detected value of the third pressure sensor 43 is less than a predetermined amount, for example, less than 0.02 MPa, the control unit closes the water softener flow valve 22 and opens the water softener bypass valve 32.

  Even when the detection value of the third pressure sensor is less than a predetermined amount, for example, less than 0.02 MPa, there is a high probability that a closed state exists in the water softener 13b, but by the control of the control unit of the present embodiment, The bypass function of the water softener 13b can be automatically and effectively used, and water treatment can be continued stably.

  Alternatively, the controller closes the water softener flow valve 22 and opens the water softener bypass valve 32 when the detected value of the water flow rate sensor 44 is less than the predetermined amount.

  Even when the detection value of the fourth water flow rate sensor is less than the predetermined amount, there is a high probability that a closed state exists in the water softener 13b, but the bypass function of the water softener 13b is controlled by the control of the control unit of the present embodiment. Can be effectively utilized automatically, and water treatment can be continued stably.

  As described above, according to the present embodiment, the water softener flow valve 22 and the water softener bypass valve 32 are automatically controlled based on the detection value of the first pressure sensor 41 that detects the pressure on the inlet side of the water softener 13b. By doing this, the bypass of the water softener 13b can be implemented in a necessary minimum and in a timely manner without requiring a manual switching operation by the user.

  Further, according to the present embodiment, the water softener flow valve 22 and the water softener bypass valve 32 are automatically controlled based on the detection value of the second pressure sensor 42 that detects the pressure on the outlet side of the water softener 13b. Thus, the bypass of the water softener 13b can be implemented in a necessary and timely manner without requiring a manual switching operation by the user.

  Further, according to the present embodiment, the water softener flow valve 22 and the water softener bypass valve 32 are automatically controlled based on the detected value of the third pressure sensor 43 that detects the pressure on the outlet side of the carbon filter 13c. Thus, the bypass of the water softener 13b can be implemented in a necessary and timely manner without requiring a manual switching operation by the user.

  Further, according to the present embodiment, the water softener flow valve 22 and the water softener bypass valve 32 are automatically controlled based on the detected value of the water flow rate sensor 44 that detects the water flow rate on the outlet side of the carbon filter 13c. Thus, the bypass of the water softener 13b can be implemented in a necessary and timely manner without requiring a manual switching operation by the user.

  In the above embodiment, when at least one detection value of the first pressure sensor 41, the second pressure sensor 42, the third pressure sensor 43, and the water flow rate sensor 44 exceeds each predetermined threshold value, The machine flow valve 22 and the water softener bypass valve 32 are automatically controlled. When two detected values of these four sensors 41 to 44 exceed their respective predetermined threshold values, the soft water The machine flow valve 22 and the water softener bypass valve 32 may be automatically controlled. In this case, the combination of the two detection values can be appropriately selected according to the specification of the water treatment apparatus 10 or the like.

  Furthermore, the water softener flow valve 22 and the water softener bypass valve 32 are automatically controlled when three detection values of the four sensors 41 to 44 exceed the respective predetermined threshold values. May be. In this case, the combination of the three detection values can be appropriately selected according to the specification of the water treatment apparatus 10 and the like.

  Alternatively, the water softener flow valve 22 and the water softener bypass valve 32 may be automatically controlled when all the detected values of the four sensors 41 to 44 exceed their predetermined threshold values. .

  Moreover, it is preferable that the time interval which the said four sensors 41-44 implement each detection corresponds to the time interval which monitors the state of the water softener 13b, and can be suitably selected by the user.

  Furthermore, in the above embodiment, it is preferable to further include a manual switch that can temporarily disable the automatic control function by the control unit. In this case, the bypass function of the water softener 13b can be temporarily disabled according to the user's request.

DESCRIPTION OF SYMBOLS 10 Water treatment apparatus 11 Raw water tank 11h Heating heater 12 Raw water pump 13 Pretreatment unit 13a Pre-filter 13b Soft water machine 13c Carbon filter 14 RO unit 14p RO pump 14m RO module 15 RO water supply unit 15t RO water tank 15u UV irradiation apparatus 15f Air filter 16 Water pump 17 UF (Ultra filter)
18 UF (Ultra Filter)
21 Water Softener Route 22 Water Softener Flow Valve 31 Water Softener Bypass Route 32 Water Softener Bypass Valve 41 First Pressure Sensor 42 Second Pressure Sensor 43 Third Pressure Sensor 44 Water Flow Sensor 51 Raw Water Tank 51h Heating Heater 52 Raw Water Pump 53 Pretreatment unit 53a Prefilter 53b Soft water machine 53c Carbon filter 54 RO unit 54p RO pump 54m RO module 55 RO water supply unit 55t RO water tank 55u UV irradiation device 55f Air filter 56 Water pump 57 UF (ultra filter)
58 UF (Ultra Filter)

Claims (10)

A raw water tank in which raw water is stored;
A pretreatment unit for pretreating raw water supplied from the raw water tank;
RO module for separating the raw water into RO water and RO drainage using a reverse osmosis membrane for the raw water pretreated by the pretreatment unit;
With
The pretreatment unit is
A water machine path including a water machine,
A water machine bypass path that bypasses the water machine;
A water softener flow valve for controlling the flow of raw water in the water softener path;
A water softener bypass valve for controlling the flow of raw water in the water softener bypass path;
A first pressure sensor for detecting a pressure on an inlet side of the water softener in the water softener path;
A control unit that automatically controls the water softener flow valve and the water softener bypass valve based on the detection value of the first pressure sensor;
The water treatment apparatus characterized by having. When the detected value of the first pressure sensor is 0.2 MPa or more, the control unit closes the water softener flow valve and opens the water softener bypass valve. The water treatment apparatus according to claim 1. A raw water tank in which raw water is stored;
A pretreatment unit for pretreating raw water supplied from the raw water tank;
RO module for separating the raw water into RO water and RO drainage using a reverse osmosis membrane for the raw water pretreated by the pretreatment unit;
With
The pretreatment unit is
A water machine path including a water machine,
A water machine bypass path that bypasses the water machine;
A water softener flow valve for controlling the flow of raw water in the water softener path;
A water softener bypass valve for controlling the flow of raw water in the water softener bypass path;
A second pressure sensor for detecting the pressure on the outlet side of the water softener in the water softener path;
A control unit that automatically controls the water softener flow valve and the water softener bypass valve based on the detection value of the second pressure sensor;
The water treatment apparatus characterized by having. When the detected value of the second pressure sensor is less than 0.07 MPa, the control unit closes the water softener flow valve and opens the water softener bypass valve. The water treatment apparatus according to claim 3. A raw water tank in which raw water is stored;
A pretreatment unit for pretreating raw water supplied from the raw water tank;
RO module for separating the raw water into RO water and RO drainage using a reverse osmosis membrane for the raw water pretreated by the pretreatment unit;
With
The pretreatment unit is
A water machine path including a water machine,
A water machine bypass path that bypasses the water machine;
A carbon filter provided on the lower sulfur side from the junction of the water softener path and the water softener bypass path;
A water softener flow valve for controlling the flow of raw water in the water softener path;
A water softener bypass valve for controlling the flow of raw water in the water softener bypass path;
A third pressure sensor for detecting the pressure on the outlet side of the carbon filter;
A control unit that automatically controls the water softener flow valve and the water softener bypass valve based on the detection value of the third pressure sensor;
The water treatment apparatus characterized by having. When the detected value of the third pressure sensor is less than 0.02 MPa, the control unit closes the water softener flow valve and opens the water softener bypass valve. The water treatment apparatus according to claim 5. A raw water tank in which raw water is stored;
A pretreatment unit for pretreating raw water supplied from the raw water tank;
RO module for separating the raw water into RO water and RO drainage using a reverse osmosis membrane for the raw water pretreated by the pretreatment unit;
With
The pretreatment unit is
A water machine path including a water machine,
A water machine bypass path that bypasses the water machine;
A carbon filter provided on the lower sulfur side from the junction of the water softener path and the water softener bypass path;
A water softener flow valve for controlling the flow of raw water in the water softener path;
A water softener bypass valve for controlling the flow of raw water in the water softener bypass path;
A water flow sensor for detecting the water flow on the outlet side of the carbon filter;
A control unit that automatically controls the water softener flow valve and the water softener bypass valve based on the detection value of the water flow rate sensor;
The water treatment apparatus characterized by having. The control unit closes the water softener flow valve and opens the water softener bypass valve when the detected value of the water flow rate sensor is less than a predetermined amount. Item 8. A water treatment apparatus according to item 7. A raw water tank in which raw water is stored;
A pretreatment unit for pretreating raw water supplied from the raw water tank;
RO module for separating the raw water into RO water and RO drainage using a reverse osmosis membrane for the raw water pretreated by the pretreatment unit;
With
The pretreatment unit is
A water machine path including a water machine,
A water machine bypass path that bypasses the water machine;
A water softener flow valve for controlling the flow of raw water in the water softener path;
A water softener bypass valve for controlling the flow of raw water in the water softener bypass path;
A first pressure sensor for detecting a pressure on an inlet side of the water softener in the water softener path;
A second pressure sensor for detecting the pressure on the outlet side of the water softener in the water softener path;
A third pressure sensor for detecting the pressure on the outlet side of the carbon filter;
A water flow sensor for detecting the water flow on the outlet side of the carbon filter;
Based on a detection value of at least one of the first pressure sensor, the second pressure sensor, the third pressure sensor, and the water flow amount sensor, the water softener flow valve and the water softener bypass valve are automatically controlled. A control unit,
The water treatment apparatus characterized by having. The water treatment apparatus according to any one of claims 1 to 9, further comprising a manual switch capable of temporarily disabling an automatic control function by the control unit.

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