JP2018143910A - Filtration device and filtration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both of energy saving and control of a concentration of a liquid chemical without complicating control in a filtration device and a filtration system which have an intermittent operation mode.SOLUTION: A controller 102 controls, in an intermittent operation mode, operation and stop of a circulation pump 120 for forming a circulation pathway of bathtub water. A control unit 180 actuates a liquid chemical injection mechanism 220 which injects a liquid chemical through a liquid chemical injection port 170 on the basis of a detection concentration of the liquid chemical in the circulation bathtub water detected by a concentration measurement portion 181. The control unit 180 periodically performs a start process. When the circulation pathway of the bathtub water is formed at a timing of the start process, the control unit executes control of the concentration of the liquid chemical based on the detection concentration detected by the concentration measurement portion 181. A time of operation at one time of the circulation pump 120 in the intermittent operation mode is longer than a period of the start process performed by the control unit 180.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a filtration device and a filtration system, and more particularly to a filtration device and a filtration system having a chemical liquid injection function.

  A structure for purifying bathtub water by incorporating a filtration device into the circulation path of bathtub water is disclosed in JP-A-3-32794 (Patent Document 1), JP-A 2012-24638 (Patent Document 2), and JP-A-3755723. It is described in the gazette (patent document 3) etc.

  In Patent Literature 1, in a household bathtub water circulation device, the filter is operated periodically (every 4 to 12 hours), and the operation time of the filter at each operation timing is set to be a value of a sterilizing chemical solution. It is described that it is set longer than the injection time.

  In Patent Documents 2 and 3, there is a technique for reducing the power consumption of the pump by operating the pump using an inverter and reducing the amount of circulating water according to the operating state under continuous filtration operation. Have been described.

JP-A-3-32794 JP 2012-246738 A Japanese Patent No. 3755723

  In a filtration system applied to a public bath or the like, unlike the domestic use as in Patent Document 1, it is required that the filtration function is continuously applied to some extent. On the other hand, in the configuration using an inverter as in Patent Documents 2 and 3, it is possible to save energy by reducing the amount of circulating water (that is, the rotation speed of the pump) according to the time zone. This increases costs.

  For this reason, the structure which saves energy without arrange | positioning an inverter by the intermittent operation which provides the time which turns on the filtration operation in the fixed time, and the time to turn off can be considered. However, in such a configuration, the chemical solution cannot be injected into the bath water during the off time of the filtration operation.

  In this regard, Patent Document 1 discloses a control for injecting a chemical solution at each operation timing of the filter on the premise that the injection timing of the chemical solution is synchronized with a limited operation timing of the filter. . However, in order to ensure the synchronization between the two, it is necessary to send and receive signals and control the timing, and there is a concern that the control becomes complicated.

  The present invention has been made to solve such problems, and an object of the present invention is to complicate control in a filtration apparatus and a filtration system that save energy by intermittent operation without requiring an inverter. It is to ensure the chemical concentration control without becoming.

  According to an aspect of the present invention, the filtration device has an intermittent operation mode, a circulation pump for introducing bath water into the circulation path, a filtration unit, a chemical solution inlet, a concentration measurement unit, and a chemical solution control. A unit and a control device are provided. A filtration part is arrange | positioned on a circulation path so that the introduced bath water may pass. The chemical solution inlet is provided on the circulation path. The concentration measuring unit detects the concentration of the chemical in the bath water flowing through the circulation path. The chemical liquid control unit activates a chemical liquid injection mechanism that injects the chemical liquid into the chemical liquid injection port according to the detection value of the chemical liquid concentration by the concentration measuring unit. The control device periodically operates and stops the circulation pump in the intermittent operation mode. The chemical liquid control unit performs the start-up process every time the first time elapses, and when the circulation pump is operating at the timing of the start-up process, the chemical liquid concentration is detected and detected by the concentration measuring unit. The operation and stop of the chemical injection mechanism are controlled based on the chemical concentration. On the other hand, when the circulation pump is not operating at the timing of the activation process, the chemical liquid control unit does not execute the chemical liquid concentration detection by the concentration measuring unit and maintains the chemical liquid injection mechanism stopped. In the intermittent operation mode, the circulation pump repeats an operation of stopping for a third time after operating for a second time set longer than the first time.

  According to another aspect of the present invention, a filtration system includes a circulation pump, a filtration unit, a control device, a chemical solution injection mechanism, a concentration measurement unit, and a chemical solution control unit. The circulation pump introduces bathtub water into the circulation path when activated. A filtration part is arrange | positioned on a circulation path so that the introduced bath water may pass. The control device periodically operates and stops the circulation pump in the intermittent operation mode. The chemical solution injection mechanism injects a chemical solution into a chemical solution inlet provided on the circulation path during operation. The concentration measuring unit detects the concentration of the chemical in the bath water flowing through the circulation path. The chemical liquid control unit operates the chemical liquid injection mechanism in accordance with the detected value of the chemical liquid concentration by the concentration measuring unit. The chemical liquid control unit performs the start-up process every time the first time elapses, and when the circulation pump is operating at the timing of the start-up process, the chemical liquid concentration is detected and detected by the concentration measuring unit. The operation and stop of the chemical injection mechanism are controlled based on the chemical concentration. On the other hand, when the circulation pump is not operating at the timing of the activation process, the chemical liquid control unit does not execute the chemical liquid concentration detection by the concentration measuring unit and maintains the chemical liquid injection mechanism stopped. In the intermittent operation mode, the circulation pump repeats an operation of stopping for a third time after operating for a second time set longer than the first time.

  According to the above filtration device and filtration system, even if the control unit starts the concentration measuring unit every first time without synchronizing with the operation period of the circulation pump, the operation period of the circulation pump once in the intermittent operation mode It is possible to secure an opportunity to execute chemical concentration control. Therefore, it is possible to reduce the power consumption by applying the intermittent operation mode without requiring an inverter, and to ensure the opportunity for injecting the chemical without complicating the control.

  Preferably, the second time in the intermittent operation is set longer than twice the first time.

  If it does in this way, the execution opportunity of multiple times of chemical | medical solution concentration control can be ensured in one circulation pump operation period in intermittent operation.

  Preferably, the intermittent operation mode has a plurality of operation patterns. In the plurality of operation patterns, at least one of the total time of the second time and the third time and the ratio of the second time to the total time are different from each other. In the operation pattern in which the second time is the shortest among the plurality of operation patterns, the second time is set longer than the first time.

  In this way, even when a plurality of operation patterns can be selected in the intermittent operation, it is possible to reliably provide an opportunity to execute the chemical concentration control during one circulation pump operation period in the intermittent operation.

  In a filtration device and a filtration system that save energy by intermittent operation without requiring an inverter, chemical concentration control can be ensured without complicating the control.

It is a block diagram explaining the structure of the filtration apparatus according to embodiment of this invention. It is an external view explaining an example of the remote control shown in FIG. It is a conceptual diagram explaining the driving | running state of the filtration apparatus in eco-operation mode. It is a flowchart explaining the control processing of chemical | medical solution concentration control. It is a conceptual wave form diagram explaining the example of operation | movement of chemical | medical solution concentration control. It is a conceptual diagram explaining an example of the eco-drive mode provided with a plurality of patterns.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In the following description, the same parts and corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated in principle.

  FIG. 1 is a block diagram illustrating a configuration of a filtration system to which a filtration device according to an embodiment of the present invention is applied.

  With reference to FIG. 1, the filtration system 5 includes a filtration device 100, a chemical liquid injector 200, and a heat source device 300.

  Filtration device 100 has water receiving port 103 and water supply port 104 connected to bathtub 10 for circulating hot water or water in bathtub 10 (hereinafter, both are collectively referred to as “tub water”). The water receiving port 103 and the water supplying port 104 are connected to the suction adapter 20 and the discharge adapter 22 arranged in the bathtub 10 via pipes, respectively. In addition, the suction adapter 20 and the discharge adapter 22 may be configured by a metal fitting unit in which both are integrated.

  In addition to the water receiving port 103 and the water supply port 104, the filtration device 100 includes a heat medium input port 105 and a heat medium output port 106 connected to the heat source device 300, a drain port 107 leading to a drain groove (not shown), It further has a chemical liquid input port 108 connected to the chemical liquid injector 200.

  The filtration apparatus 100 further includes a controller 102, a filtration tank 110, a circulation pump 120, a hair catcher 130, a flow path switching valve 140 constituted by a five-way valve, pipes 141 to 146, and a heat exchanger 150. And a temperature control valve 160 constituted by a three-way valve, a chemical solution injection port 170, a control unit 180 for controlling the chemical concentration, and a chemical concentration detection unit 181. The filtration tank 110 corresponds to an example of a “filtration unit”.

First, the basic configuration and operation related to the filtration operation of the filtration device will be described.
The piping 141 is connected in series with the circulation pump 120 and the hair catcher 130 between the water receiving port 103 and the flow path switching valve 140. The pipe 145 connects between the flow path switching valve 140 and the drain port 107.

  The circulation pump 120 is controlled by the controller 102 and sucks bath water from the suction adapter 20 via the water receiving port 103 during operation. Hair catcher 130 is connected to water receiving port 103. The sucked bathtub water is introduced into the filtration device 100 via the hair catcher 130 and the pipe 141. During operation of the circulation pump 120, a circulation path for bath water is formed between the filtration device 100 and the bathtub 10.

  The filtration tank 110 contains a filter medium 112. An air vent valve 111 is disposed in the filtration tank 110. The pipe 142 connects the upper region of the filter medium 112 in the filtration tank 110 and the flow path switching valve 140. Similarly, the pipe 143 connects the lower region of the filter medium 112 in the filtration tank 110 and the flow path switching valve 140.

  One end of the pipe 144 is connected to the flow path switching valve 140, and the other end is connected to the secondary side path 152 of the heat exchanger 150. The secondary side path 152 is connected to the water supply port 104 by a pipe 146.

  The flow path switching valve 140 can be formed by an electromagnetic five-way valve for selectively forming a flow path between the pipes 141 to 145. The flow path switching valve 140 is controlled by the controller 102. The circulation path of the bath water in the filtration device 100 is switched by the control of the flow path switching valve 140.

  The primary path 151 of the heat exchanger 150 is connected to the heat medium output port 106 and is connected to the heat medium input port 105 via the temperature adjustment valve 160. A heat transfer medium is input from the heat source device 300 to the heat medium input port 105. In accordance with a command from the controller 102, the temperature adjustment valve 160 includes a first path that passes through the primary path 151 and a second path that bypasses the primary path 151 between the heat medium input port 105 and the heat medium output port 106. Are selectively formed. The heat transfer medium from the heat medium input port 105 is returned to the heat source device 300 from the heat medium output port 106 via the first path or the second path.

  When the temperature adjustment valve 160 forms the first path, heat exchange is performed between the circulating bath water passing through the primary path 151 and the heat transfer medium from the heat source unit 300, so-called a memorial function. Can be realized. On the other hand, when the second path is formed by the temperature adjustment valve 160, the heat exchange between the circulating bath water and the heat transfer medium is not executed, and the memory is not executed.

  On the upstream side (water receiving port 103 side) of the heat exchanger 150, for example, a temperature sensor 165 for detecting the incoming water temperature to the filtration device 100 is disposed in the pipe 141. In addition, a temperature sensor 166 for detecting an output temperature from the filtration device 100 is disposed, for example, in the pipe 146 on the downstream side of the heat exchanger 150 (the water supply port 104 side).

  The controller 102 is typically constituted by a microcomputer, and controls the operation of the filtration device 100 in accordance with an operation command input to a remote controller (hereinafter also referred to as “remote controller”) 500. Specifically, the controller 102 generates and outputs control signals for the circulation pump 120, the flow path switching valve 140, and the temperature adjustment valve 160.

  The operation command includes an operation command and a stop command for the filtering device 100, and an operation mode selection command at the time of operation. These commands may be reserved and input in a so-called timer operation mode in which a time schedule is designated in advance. The controller 102 can execute a filtration operation by circulation of bathtub water by the operation of the circulation pump 120.

  Further, the operation command includes a target temperature Tr of bath water. For example, the bath water replenishment function using the heat exchanger 150 described above can be turned on and off according to the comparison between the incoming water temperature detected by the temperature sensor 165 and the target temperature Tr.

  FIG. 2 is an external view illustrating an example of remote controller 500 of filtration device 100 according to the embodiment of the present invention.

  Referring to FIG. 2, remote control 500 is provided with display unit 510, lid unit 520, and a plurality of operation switches. The lid 520 is configured to be openable and closable by rotation along the vertical direction. In FIG. 5, the lid 520 is in an open state. A plurality of operation switches are also provided in a region covered when the lid portion 520 is closed.

  The display unit 510 is configured by a liquid crystal matrix screen, and can display a state (for example, an operating state) of the filtration device 100 and the like. For example, the display unit 510 includes character information indicating that the filtration operation is being performed, character information indicating the current day of the week and time, and a specified operation time (in the example in the figure, from 5 pm to 2 am ) Can be displayed.

  The operation switches include a switch for turning on / off the power of the filtration device 100, a switch for instructing operation of the filtration device 100 (timer operation / continuous operation), and a switch for displaying a reservation confirmation. In addition, the operation switch stored in the lid 520 includes a temperature input switch 530 for changing the target temperature Tr. The temperature input switch 530 includes a down switch 531 for lowering the target temperature Tr below the current value, and an up switch 532 for raising the target temperature Tr above the current value.

  Furthermore, in the filtering device according to the present embodiment, remote control 500 is provided with input switch 511 for “eco-operation mode” for energy saving. The eco-operation mode can be selected by operating the input switch 511 when the operation switch is turned on or during the operation time designated by the timer operation. In the eco operation mode, the filtration device 100 operates as shown in FIG. 3, so that power consumption can be reduced.

FIG. 3 is a conceptual diagram illustrating the operation state of the filtration device in the eco operation mode.
Referring to FIG. 3, in the eco operation mode, circulation pump 120 is operated intermittently. For example, the circulation pump 120 is operated so as to repeat operation and stop periodically according to a specified operation time Tp and stop time Toff.

  On the other hand, when the eco-operation mode is not selected, the circulation pump 120 is continuously operated when the operation switch is turned on or during the operation time designated by the timer operation. Accordingly, the degree of energy reduction in the eco-operation mode depends on the ratio (Tp / Tcyc) of the operation time Tp to the intermittent operation cycle Tcyc (Tcyc = Tp + Toff).

  Even if the circulating pump 120 is operated only at the commercial frequency without disposing an inverter as in Patent Documents 2 and 3, the power consumption can be reduced by intermittent operation of the circulating pump 120. That is, the eco operation mode corresponds to the “intermittent operation mode”.

  Referring to FIG. 1 again, the controller 102 can switch between the “filtration mode”, the “backwash mode”, and the “washing mode” by controlling the flow path switching valve 140 during the filtration operation.

  Filtration mode is performed continuously in order to filter and circulate bathtub water. In the filtration mode, the circulation pump 120 operates and the flow path switching valve 140 is controlled to form a flow path between the pipes 141 and 142 and between the pipes 143 and 144. Thereby, the bath water sucked from the water receiving port 103 is introduced into the upper portion of the filter medium 112 in the filtration tank 110 via the hair catcher 130, the circulation pump 120, the pipe 141, and the pipe 142.

  Thereby, the bath water is filtered by the passage of the filter medium 112 after foreign matters (dust, hair, etc.) are removed by the hair catcher 130. Further, the filtered bathtub water is output to the water supply port 104 via the pipe 143, the pipe 144, the heat exchanger 150 (secondary side path 152), and the pipe 146, and the bathtub 10 (discharge adapter 22). ). Thereby, the circulation path of bathtub water is formed in the filtration apparatus 100 and the bathtub 10. Furthermore, in the filtration mode, the temperature of the bath water can be maintained at the target temperature Tr by turning on the above-described re chasing function based on the temperature detected by the temperature sensor 165 (the temperature of water entering the filtration device 100).

  The backwash mode can be performed during cleaning in order to discharge dirt accumulated in the filtration tank 110. In the backwash operation mode, the circulation pump 120 is operated, and the flow path switching valve 140 is controlled to form a flow path between the pipes 141 and 143 and between the pipes 142 and 145. Thereby, the bathtub water input from the water receiving port 103 is introduced into the lower part of the filter medium 112 in the filtration tank 110 via the hair catcher 130, the circulation pump 120, the piping 141, and the piping 143. And the filter medium 112 is lifted by the flow of the reverse direction at the time of filtration operation, The dirt in the filter medium 112 is discharged | emitted by bathtub water. The bathtub water flowing in the reverse direction through the filter medium 112 is discharged from the drainage port 107 without being returned to the bathtub 10 via the pipe 142 and the pipe 145.

  The cleaning mode can be executed mainly to discharge dirty water generated in the backwash operation. In the cleaning operation mode, the circulation pump 120 is operated, and the flow path switching valve 140 is controlled so as to form a flow path between the pipes 141 and 142 and between the pipes 143 and 145. Thereby, the bathtub water sucked from the water receiving port 103 flows from the upper part to the lower part of the filter medium 112 in the filtration tank 110, and the bathtub water after passing through the filter medium 112 passes through the pipe 143 and the pipe 145, It is discharged from the drain 107 without returning to 10. Thereby, the filter medium 112 that has been swollen by the backwash operation can be fastened.

Next, the configuration and control related to the chemical solution injection function of the filtration device 100 will be described.
The chemical solution injection device 200 includes a chemical solution tank 210 that accumulates a chemical solution having a bactericidal action, and a chemical solution pump 220 for injecting the chemical solution into the circulating bath water. In the chemical liquid tank 210, a level meter 215 for detecting the liquid level is arranged. For example, the chemical solution has a chlorine concentration equal to or higher than a predetermined value.

  By the operation of the chemical liquid pump 220, the chemical liquid input to the filtration device 100 is mixed into the circulating bath water from the chemical liquid inlet 170 provided in the middle of the pipe 141. Thereby, the chemical | medical solution density | concentration (henceforth chlorine concentration) of circulating bathtub water can be raised. The output signal of the level meter 215 is input to the control unit 180. Further, the stop and operation of the chemical pump 220 are controlled by the control unit 180.

  The chemical concentration detection unit 181 for detecting the chlorine concentration in the circulating bath water includes an electromagnetic valve 182, a flow sensor 184, a chlorine sensor 185, and a bypass pipe 186. For example, the bypass pipe 186 is connected between the pipe 144 and the hair catcher 130. The electromagnetic valve 182, the flow sensor 184, the chlorine sensor 185, and the on-off valve 189 are connected to the bypass pipe 186.

  The electromagnetic valve 182 is controlled to open and close according to a signal from the control unit 180. For example, the control unit 180 can open and close the electromagnetic valve 182 in conjunction with the operation and stop of the circulation pump 120. That is, the control unit 180 can perform the opening / closing control of the electromagnetic valve 182 by receiving a signal indicating whether the circulation pump 120 is in the operating state or the stopped state from the controller 102. In addition, at the time of the first operation | movement of the circulation pump 120 accompanying the operation start of the filtration apparatus 100, it is also possible to close the solenoid valve 182 over the first fixed time (for example, several minutes).

  The chemical concentration detection unit 181 can introduce a part of the circulating bath water from the pipe 144 into the bypass pipe 186 when the electromagnetic valve 182 is opened. The introduced circulating bath water passes through the flow sensor 184 and the chlorine sensor 185. Thereby, the control unit 180 can detect the chlorine concentration (namely, chemical | medical solution concentration) in the bath water output to the bathtub 10 based on the detected value by the flow sensor 184 and the chlorine sensor 185. On the other hand, during the period when the control unit 180 closes the electromagnetic valve 182, the circulating bath water is not introduced into the bypass pipe 186, and thus the chemical concentration is not detected.

  The control unit 180 periodically detects the chlorine concentration (chemical solution concentration) of the circulating bath water by actuating the chemical solution concentration detection unit 181. Then, when the detected chemical concentration is lowered, the chemical concentration can be increased by the operation of the chemical pump 220. That is, the chemical concentration detection unit 181 corresponds to an example of the “concentration measuring unit”, and the chemical pump 220 corresponds to an example of the “chemical solution injection mechanism”.

  In addition, a manual on-off valve 189 can be further arranged in the bypass pipe 186. By closing the on-off valve 189, the chlorine sensor 185 can be kept in a state of being immersed in water during the power-off period of the filtration device 100.

  FIG. 4 is a flowchart illustrating a control process for chemical concentration control. The control process shown in FIG. 4 is performed periodically by the control unit 180 every time the time measured by the timer reaches a predetermined time Tc from the starting point, for example, with the operation start timing of the filtering device 100 as the starting point. It is activated.

  Referring to FIG. 4, control unit 180 determines whether circulation pump 120 is currently operating or not in step S <b> 110 as the activation process of each cycle. The determination in step S110 can be executed based on the signal from the controller 102, for example.

  If the circulating pump 120 is in operation during the startup process (YES in S110), the control unit 180 advances the process to step S120. In this case, since the circulating bath water is introduced into the bypass pipe 186 by opening the solenoid valve 182 in conjunction with the operation of the circulation pump 120, a chlorine concentration measurement path is formed in the chemical concentration detection unit 181. Can do.

  In step S120, the control unit 180 calculates the chlorine concentration based on the detection values of the flow sensor 184 and the chlorine sensor 185. Thereby, the chlorine concentration in the said period is sampled. Further, in step S130, the control unit 180 compares the chlorine concentration sampled in step S120 with the reference concentration Ct.

  If the detected concentration sampled in step S120 is lower than the reference concentration (YES in S130), the control unit 180 proceeds to step S140 and sets the chemical solution injection time Tcl. The chemical solution injection time Tcl can be set longer as the detected concentration is lower, for example. Further, in step S150, the control unit 180 generates a control command for operating the chemical pump 220 over the chemical injection time Tcl set in step S140. Thereby, a chemical | medical solution is inject | poured into circulation bathtub water from the chemical | medical solution injection port 170. FIG. The control unit 180 stops the chemical pump 220 when the chemical injection time Tcl has elapsed from the start of the operation of the chemical pump 220, and ends the operation in this cycle of the chemical concentration control.

  On the other hand, when the detected density is equal to or higher than the reference density (when NO is determined in S130), control unit 180 skips steps S140 and S150 and ends the operation in the current cycle. In this case, since the chemical pump 220 is maintained in the stopped state, the injection of the chemical is not executed.

  As described above, the control unit 180 executes the chemical concentration control that detects the chemical concentration (chlorine concentration) of the circulating bath water and executes or does not execute the chemical injection based on the detected concentration at every fixed period Tc. be able to.

  Note that the opening and closing of the electromagnetic valve 182 can be controlled as part of the chemical concentration control. For example, the control unit 180 can open the electromagnetic valve 182 when the determination in step S110 is YES, and can perform sampling of the chemical concentration in step S120 after the electromagnetic valve 182 is opened. In this case, the electromagnetic valve 182 can be closed when NO is determined in step S130 or when the operation of the chemical pump 220 is completed in step S150.

FIG. 5 is a conceptual waveform diagram for explaining an operation example of chemical concentration control.
Referring to FIG. 5, the control process of FIG. 4 is started at each of times t1a, t2a, t3a, t4a, and t5a when a certain time Tc elapses. When the filtration operation is continuously performed, the chemical concentration (chlorine concentration) is also detected in each cycle by the chemical concentration detection unit 181.

  In each cycle started at times t1a and t2a, since the detected concentration is equal to or higher than the reference concentration, the chemical pump 220 is maintained in a stopped state (off).

  On the other hand, in each cycle started from time t3a to t5a, since the detected concentration is lower than the reference concentration, a chemical solution injection period is provided by the operation of the chemical solution pump 220 from the time t3b to t5b when the detection and determination of the chemical solution concentration is completed. . As described above, the chemical liquid injection time Tcl indicating the length of the chemical liquid injection period can be variably set according to the detected concentration in each cycle.

  In the example of FIG. 5, Tcl = T1 in the cycle from time t3a is shorter than Tcl = T2 in the cycle from time t4a. Furthermore, Tcl = T3 in the period from time t5a is shorter than both T1 and T2 (T2> T1> T3). Then, at time t3c to t5c when the chemical liquid injection time Tcl elapses, the chemical liquid pump 220 is stopped.

  As described above, the control unit 180 activates the control process of FIG. 4 every elapse of the predetermined time Tc, regardless of whether the eco-operation mode or the continuous operation mode is selected. That is, the control unit 180 performs chemical concentration control periodically (cycle Tc) without requiring synchronization with the timing at which the controller 102 of the filtration device 100 starts the circulation pump 120.

  Referring to FIG. 4 again, when the eco operation mode shown in FIG. 3 is applied, there is a possibility that the stop period of circulation pump 120 overlaps during the starting process of the chemical concentration control. In this case, since the bath water is not circulated, the concentration of the chemical solution cannot be accurately detected, so that the opportunity for controlling the concentration of the chemical solution is lost.

  Specifically, the controller 102 skips the processing of steps S110 to S150 when the circulation pump 120 is stopped during the starting process of the chemical concentration control (when NO is determined in S110), and in this cycle. End the operation. For this reason, it is necessary to consider coexistence of the eco operation mode for energy saving and the chemical concentration control for the sterilization function.

  The degree of energy reduction in the eco operation mode depends on the operation time ratio (Tp / Tcyc) of the circulation pump 120 shown in FIG. For this reason, in order to secure the opportunity of chemical concentration control while maintaining the energy reduction degree, it is conceivable to shorten the stop time Toff per time.

  However, if the stop time Toff is shortened, it is necessary to shorten the operation time Tp and the cycle Tcyc in order to maintain the operation time ratio (Tp / Tcyc). Here, when the operation time Tp is shortened, on the contrary, unless the activation processing timing by the control unit 180 and the setting timing of the operation time Tp by the controller 102 are synchronized, there is a possibility that the opportunity for the chemical concentration control is lost. . As described above, when timing synchronization between the controller 102 and the control unit 180 is required, there is a concern about complicated control.

  Therefore, in the filtration system according to the present embodiment, the operation time Tp of the circulation pump per time in the eco operation mode is set longer than the starting period Tc of the chemical concentration control. Thereby, at least 1 time of chemical | medical solution concentration control can be performed during the period Tcyc (Tcyc = Tp + Toff) of the intermittent operation in eco-operation mode. Preferably, by setting Tp> 2 · Tc, it is possible to ensure the opportunity to execute the chemical solution concentration control a plurality of times and to ensure the chemical injection time Tcl.

  As a result, the filtration system according to the present embodiment can be configured at a low cost without arranging an inverter, and energy saving and chemical injection can be performed without complicating the control due to synchronization between the controller 102 and the control unit 180. Securing both opportunities.

  Thus, the eco operation mode corresponds to the “intermittent operation mode”, and the chemical liquid concentration control activation cycle Tc corresponds to the “first time”. Further, in the intermittent operation of the circulation pump 120, the operation time Tp per operation corresponds to the “second time”, and the stop time Toff per operation corresponds to the “third time”.

  In addition, by dividing the water amount [L] of the bathtub 10 by the circulation flow rate [L / min] by the circulation pump 120, it is possible to estimate the time required for purifying and sterilizing the entire amount of bathtub water through the filtration device 100. Therefore, the operation time Tp is also required to be set longer than the minimum time according to the product of the required time and the necessary number of circulations.

  For this reason, as shown in FIG. 6, a plurality of intermittent operation patterns may be set for the eco operation mode.

  Referring to FIG. 6, the eco operation mode has operation patterns PT1 to PT3 having different operation time ratios (Tp / Tcyc). For example, the operation patterns PT1 to PT3 have different operation time ratios (Tp / Tcyc) because the operation times Tp1 to Tp3 are different from each other while the cycle Tcyc of the intermittent operation is common.

  The driving patterns PT1 to PT3 are determined in advance, and the user can select one of the driving patterns PT1 to PT3 by an input operation to the remote controller 500. When such a plurality of operation patterns can be selected, the minimum value of the operation time in each of the plurality of operation patterns (Tp3 in FIG. 6) is longer than the starting period Tc of the chemical concentration control, It is set longer than 2 · Tc.

  Thereby, in each operation pattern, the operation time of the circulation pump 120 can be set longer than the starting cycle Tc (or 2 · Tc) of the chemical concentration control. Therefore, even in the eco operation mode having a plurality of operation patterns, the opportunity for chemical concentration control can be reliably ensured.

  In addition, about the some driving | operation pattern, it is also possible to set the thing from which the period Tc of intermittent operation differs unlike the example of FIG. That is, if at least one of the operation time ratio (Tp / Tcyc) and the intermittent operation cycle Tc is different between a plurality of patterns, the combination of the operation time Tp and the stop time Toff can be arbitrarily adjusted. .

  In FIG. 1, the chemical solution injection port 170, the chemical solution concentration control unit 180, and the chemical solution concentration detection unit 181 are built in the filtration device 100, and the chemical solution injection device 200 is disposed outside the filtration device 100. Although illustrated, each element for these chemical solution injection functions may be disposed either inside or outside the filtration device 100.

  Further, the configuration of the circulation path in the filtration system and the configuration for the sterilization function are not limited to the configuration example of FIG. 1, and have an operation mode in which the bathtub water is circulated intermittently and is circulated. If it is possible to periodically start concentration control by injecting chemical liquid into bath water, the combination of the eco operation mode according to the present embodiment and the periodically started chemical concentration control is applied to any configuration Is possible.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  5 Filtration System, 10 Bathtub, 20 Suction Adapter, 22 Discharge Adapter, 100 Filtration Device, 102 Controller, 103 Water Receiving Port, 104 Water Feeding Port, 105 Heating Medium Input Port, 106 Heating Medium Output Port, 107 Drainage Port, 108 Chemical Solution Input Port , 110 Filtration tank, 111 Air vent valve, 112 Filter medium, 120 Circulation pump, 130 Hair catcher, 140 Flow path switching valve, 141-146 Piping, 150 Heat exchanger, 151 Primary path, 152 Secondary path, 160 Temperature Regulating valve, 165, 166 Temperature sensor, 170 Chemical solution injection port, 180 Control unit, 181 Chemical solution concentration detection unit, 182 Solenoid valve, 184 Flow rate sensor, 185 Chlorine sensor, 186 Bypass piping, 189 On-off valve, 200 Chemical solution injection device, 210 Chemical tank, 215 level meter , 220 chemical pump, 300 heat source machine, 500 remote control, 510 display unit, 511 input switch, 520 lid unit, 530 temperature input switch, 531 down switch, 532 up switch, Ct reference concentration (chemical solution concentration control), PT1 to PT3 operation Pattern (intermittent operation), Tc cycle (chemical solution concentration control), Tcl chemical solution injection time, Tcyc cycle (intermittent operation), Toff stop time, Tp, Tp1-Tp3 operating time.

Claims (4)

A filtration device having an intermittent operation mode,
A circulation pump for introducing bath water into the circulation path;
A filtration unit arranged on the circulation path so that the introduced bath water passes;
A chemical injection port provided on the circulation path;
A concentration measuring unit for detecting the concentration of the chemical in the bath water flowing through the circulation path;
A chemical control unit that operates a chemical injection mechanism that injects the chemical into the chemical injection port according to a detection value of the chemical concentration by the concentration measurement unit;
A controller for periodically operating and stopping the circulation pump in the intermittent operation mode,
The chemical liquid control unit performs a start-up process every time the first time elapses, and detects the chemical liquid concentration by the concentration measurement unit when the circulation pump is operating at the timing of the start-up process. And controlling the operation and stop of the chemical solution injection mechanism based on the detected concentration of the chemical solution, while the circulation pump is not operating at the timing of the activation process, the concentration of the chemical solution by the concentration measurement unit Non-execution of the detection and maintain the stop of the chemical injection mechanism,
The said circulation pump is a filtration apparatus which repeats the operation | movement which stops over 3rd time, after operating for 2nd time set longer than the said 1st time in the said intermittent operation mode.   The filtration device according to claim 1, wherein the second time is set to be longer than twice the first time. The intermittent operation mode has a plurality of operation patterns in which at least one of a total time of the second time and the third time and a ratio of the second time to the total time are different from each other,
2. The filtration device according to claim 1, wherein in the operation pattern in which the second time is the shortest among the plurality of operation patterns, the second time is set longer than the first time. A circulation pump for introducing bath water into the circulation path;
A filtration unit arranged on the circulation path so that the introduced bath water passes;
A control device for periodically operating and stopping the circulation pump in the intermittent operation mode;
A chemical injection port provided on the circulation path;
A chemical injection mechanism for injecting a chemical into the chemical injection port;
A concentration measuring unit for detecting the concentration of the chemical in the bath water flowing through the circulation path;
A chemical liquid control unit for operating the chemical liquid injection mechanism according to a detection value of the chemical liquid concentration by the concentration measuring unit,
The chemical liquid control unit performs a start-up process every time the first time elapses, and detects the chemical liquid concentration by the concentration measurement unit when the circulation pump is operating at the timing of the start-up process. And controlling the operation and stop of the chemical solution injection mechanism based on the detected concentration of the chemical solution, while the circulation pump is not operating at the timing of the activation process, the concentration of the chemical solution by the concentration measurement unit Non-execution of the detection and maintain the stop of the chemical injection mechanism,
In the intermittent operation mode, the circulation pump repeats an operation of stopping for a third time after operating for a second time set longer than the first time.

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