System for sewage draining with Anti-clog pumps

Abstract

The embodiments relate to a sewage drainage system comprising: a chamber section including a storage tank in which sewage flowing in from a sewage inlet pipe is stored until discharged; a pump section disposed inside the chamber section and simultaneously grinding foreign substances contained in the sewage stored inside the chamber section and discharging the sewage and foreign substances; a drainage section communicating with the pump section and serving as a flow path for draining the sewage and foreign substances from the pump section; and a control section for controlling the water level of the sewage in the storage tank.

Description

Technology Field

[0001] Embodiments of the present invention relate to a sewage drainage system. Background Technology

[0002] Generally, wastewater generated from buildings is collected and discharged by wastewater discharge devices, and septic tanks are buried underground using synthetic resin materials such as FRP or PE. In residential or commercial buildings, wastewater discharge devices are sometimes placed in underground spaces to maximize space utilization. For small to medium-sized septic tanks, the process involves excavating the ground, inserting the tank into the pit, and filling the area around it with soil. For medium to large-sized septic tanks, the process involves excavating the ground, pouring floor concrete, and then installing the tank on top of it.

[0003] A sewage pump device is provided within the sewage treatment tank. A sewage treatment system according to conventional technology consists of multiple pump devices and a central control unit for managing them. When a malfunction or emergency occurs in each pump device, status information for each pump station is transmitted to the central control unit, which monitors this information to manage each pump station.

[0004] Unlike general submersible pumps, sewage pump systems are prone to frequent clogging due to the nature of transporting sewage, a fluid containing foreign substances. This blockage can reduce the pumping efficiency of the sewage pump system or lead to pump failure and damage. If a sewage pump fails, the volume of collected water in the septic tank may increase, potentially leading to backflow. When multiple sewage pumps are installed in a septic tank, there is a concern that the collected volume may not be adequately pumped out if some pumps fail. In other words, there is a need for a system that ensures the multiple sewage pumps are utilized evenly, rather than being over-operated by only a portion of them.

[0005] Furthermore, in the case of a sewage treatment tank equipped with multiple sewage pump units, it is important to determine whether to operate all, some, or none of the pump units depending on the amount of sewage in the tank. Additionally, even if some of the sensors measuring the water level in the tank malfunction, a system is required that automatically sets the operating mode of the sewage pump units by identifying whether the water level is high, medium, or low. Prior art literature

[0006] Korean Registered Patent Publication No. 10-2246436 The problem to be solved

[0007] The embodiments of the present invention aim to improve upon the aforementioned problems of conventional sewage treatment by providing a sewage drainage system capable of preventing the pump unit from idling at low or low water levels.

[0008] In addition, embodiments of the present invention aim to provide a wastewater drainage system capable of resolving blockage caused by foreign substances by rotating the pump unit in reverse or idling it.

[0009] In addition, embodiments of the present invention aim to provide a sewage drainage system capable of operating multiple pumps equally so that the total operating time of multiple pump units becomes equal.

[0010] In addition, embodiments of the present invention aim to provide a wastewater drainage system in which the pump unit can operate normally even if a malfunction occurs in the water level sensor.

[0011] The technical problems to be solved in the embodiments are not limited to those mentioned above, and other unmentioned technical problems may be considered by those skilled in the art from the various embodiments described below. means of solving the problem

[0012] According to embodiments, a wastewater drainage system may include: a chamber section comprising a storage tank in which wastewater introduced from a wastewater inlet pipe is stored until discharged; a pump section disposed inside the chamber section and simultaneously grinding foreign substances contained in the wastewater stored inside the chamber section and discharging the wastewater and the foreign substances; a drainage section communicating with the pump section and serving as a flow path for draining the wastewater and the foreign substances from the pump section; and a control section for controlling the water level of the wastewater in the storage tank.

[0013] Additionally, according to embodiments, the control unit includes a current sensor for measuring the current flowing within the pump unit; a pump control module for controlling the operation of the pump unit; and a main controller for comparing the current measured by the current sensor with the rated current of the pump unit, wherein if the current measured by the current sensor is greater than the rated current, the main controller determines that a blockage caused by foreign matter has occurred within the pump unit and can cause the pump unit to alternately repeat reverse and forward rotation operations by the pump control module.

[0014] Additionally, according to embodiments, the chamber unit further includes a water level sensor module comprising a low water level sensing floater for sensing the low water level of the wastewater in the reservoir, a medium water level sensing floater for sensing the medium water level, and a high water level sensing floater for sensing the high water level, and the main controller determines that idle operation has occurred in the pump unit when the current measured by the current sensor is less than the rated current and the water level of the wastewater detected by the water level sensor module is a low water level or a low water level, and can cause the pump unit to be stopped by the pump control module.

[0015] Additionally, according to the embodiments, the pump unit is composed of a plurality of pumps as a first pump and a second pump, and the first pump and the second pump are operated in a simultaneous operation mode, an alternating operation mode, or a simultaneous stop mode, and the main controller detects the number of operations and the operating time of the first pump and the second pump, respectively, and compares the total operating time of the first pump and the total operating time of the second pump, and can control the pump control module so that in the alternating operation mode, the pump with a shorter total operating time is operated before the pump with a longer total operating time.

[0016] Additionally, according to embodiments, the main controller controls the pump control module to operate the first pump and the second pump in the simultaneous operation mode when (i) the low water level is not detected by the low water level sensing plotter, the medium water level is detected by the medium water level sensing plotter, and the high water level is detected by the high water level sensing plotter; (ii) the pump control module to operate the first pump and the second pump in the simultaneous operation mode when the low water level is not detected by the low water level sensing plotter, the medium water level is not detected by the medium water level sensing plotter, and the high water level is detected by the high water level sensing plotter; and (iii) the pump control module to operate the first pump and the second pump in the alternating operation mode when the low water level is not detected by the low water level sensing plotter, the medium water level is detected by the medium water level sensing plotter, and the high water level is not detected by the high water level sensing plotter. It is possible.

[0017] Additionally, according to embodiments, the control unit further includes a display indicating the current state and operating state of the pump unit and the chamber unit, and (i) when a low water level is not detected by the low water level sensing plotter, a medium water level is detected by the medium water level sensing plotter, and a high water level is detected by the high water level sensing plotter, the display indicates a high water level alarm and a low water level sensing plotter malfunction; (ii) when a low water level is not detected by the low water level sensing plotter, a medium water level is not detected by the medium water level sensing plotter, and a high water level is detected by the high water level sensing plotter, the display indicates a high water level alarm and a low water level sensing plotter and a medium water level sensing plotter malfunction; and (iii) when a low water level is not detected by the low water level sensing plotter, a medium water level is detected by the medium water level sensing plotter, and a high water level is not detected by the high water level sensing plotter, the display indicates a medium water level alarm and It can display abnormalities in the low water level sensing plotter. Effects of the invention

[0018] According to a wastewater drainage system according to one embodiment of the present invention, the pump unit can be prevented from idling at a low water level or low water level.

[0019] In addition, according to a wastewater drainage system according to one embodiment of the present invention, clogging caused by foreign substances can be resolved by rotating the pump unit in reverse or idling.

[0020] In addition, according to one embodiment of the present invention, a wastewater drainage system can be provided that allows multiple pumps to be operated equally so that the total operating time of multiple pump units becomes equal.

[0021] In addition, according to one embodiment of the present invention, a wastewater drainage system can be provided in which the pump unit can operate normally even if a malfunction occurs in the water level sensor.

[0022] The effects obtainable from the embodiments are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by a person skilled in the art based on the detailed description below. Brief explanation of the drawing

[0023] The accompanying drawings, included as part of the detailed description to aid in understanding the embodiments, provide various embodiments and explain the technical features of the various embodiments together with the detailed description. FIG. 1 is a schematic diagram illustrating a sewage drainage system according to one embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a pump unit according to an embodiment of the present invention. FIG. 3 is a block diagram illustrating a wastewater drainage system according to one embodiment of the present invention. FIG. 4 is a flowchart illustrating a control method for a wastewater drainage system according to one embodiment of the present invention. FIG. 5 is a drawing showing the operating state at a low water level when a wastewater drainage system according to one embodiment of the present invention is operating normally, where FIG. 5 (a) shows the inside of the reservoir and FIG. 5 (b) shows a part of the screen displayed on the control unit's display. FIG. 6 is a drawing showing the operating state at a medium water level when a wastewater drainage system according to one embodiment of the present invention is operating normally, where FIG. 6 (a) shows the inside of a reservoir and FIG. 6 (b) shows a part of the screen displayed on the control unit's display. FIG. 7 is a drawing showing the operating state at a high water level when a wastewater drainage system according to one embodiment of the present invention is operating normally, where FIG. 7 (a) shows the inside of a reservoir and FIG. 7 (b) shows a part of the screen displayed on the control unit's display. FIG. 8 is a drawing showing the operating state at a high water level when the low water level sensing plotter of a wastewater drainage system according to one embodiment of the present invention is malfunctioning, where FIG. 8 (a) shows the inside of the reservoir and FIG. 8 (b) shows a part of the screen displayed on the control unit's display. FIG. 9 is a drawing showing the operating state at a high water level when the low water level sensing floater and the medium water level sensing floater of a wastewater drainage system according to one embodiment of the present invention are malfunctioning, where FIG. 9 (a) shows the inside of the reservoir and FIG. 9 (b) shows a part of the screen displayed on the control unit's display. FIG. 10 is a drawing showing the operating state at a medium water level when the low water level sensing plotter of a wastewater drainage system according to one embodiment of the present invention is faulty, where FIG. 10 (a) shows the inside of the reservoir and FIG. 10 (b) shows a part of the screen displayed on the control unit's display. Specific details for implementing the invention

[0024] The following embodiments are combinations of the components and features of the embodiments in a predetermined form. Each component or feature may be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form not combined with other components or features. Additionally, various embodiments may be constructed by combining some components and / or features. The order of operations described in various embodiments may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment.

[0025] In the description of the drawings, procedures or steps that could obscure the essence of the various embodiments were not described, nor were procedures or steps that can be understood by a person of ordinary knowledge in the relevant technical field described.

[0026] Throughout the specification, when a part is described as "comprising" or "including" a component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Furthermore, terms such as "...part," "...unit," and "module" as used in the specification refer to a unit that performs at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software. Additionally, "one (a or an)," "one," "the," and similar related terms may be used in the context describing various embodiments (particularly in the context of the following claims) in both singular and plural forms, unless otherwise indicated in the specification or clearly contradicted by the context.

[0027] Hereinafter, embodiments according to various examples will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of various examples and is not intended to represent the only embodiment.

[0028] In addition, specific terms used in various embodiments are provided to aid in understanding the various embodiments, and the use of such specific terms may be modified in other forms within the scope of not departing from the technical concept of the various embodiments.

[0030] FIG. 1 is a schematic diagram for explaining a sewage drainage system according to an embodiment of the present invention, FIG. 2 is a cross-sectional view for explaining a pump unit according to an embodiment of the present invention, FIG. 3 is a block diagram for explaining a sewage drainage system according to an embodiment of the present invention, FIG. 4 is a flowchart showing a control method of a sewage drainage system according to an embodiment of the present invention, FIG. 5 is a diagram showing the operation state at a low water level when the sewage drainage system according to an embodiment of the present invention is operating normally, FIG. 5(a) shows the interior of a storage tank, FIG. 5(b) shows a part of the screen displayed on the control unit's display, FIG. 6 is a diagram showing the operation state at a medium water level when the sewage drainage system according to an embodiment of the present invention is operating normally, FIG. 6(a) shows the interior of a storage tank, FIG. 6(b) shows a part of the screen displayed on the control unit's display, FIG. 7 is a diagram showing the operation state at a high water level when the sewage drainage system according to an embodiment of the present invention is operating normally, FIG. 7(a) FIG. 7(b) is a drawing showing a part of the screen displayed on the control unit's display, FIG. 8 is a drawing showing the operating state at a high water level when the low water level sensing floater of the sewage drainage system according to an embodiment of the present invention is malfunctioning, FIG. 8(a) is a drawing showing the interior of the reservoir, FIG. 8(b) is a drawing showing a part of the screen displayed on the control unit's display, FIG. 9 is a drawing showing the operating state at a high water level when the low water level sensing floater and the medium water level sensing floater of the sewage drainage system according to an embodiment of the present invention are malfunctioning, FIG. 9(a) is a drawing showing the interior of the reservoir, FIG. 9(b) is a drawing showing a part of the screen displayed on the control unit's display, FIG. 10 is a drawing showing the operating state at a medium water level when the low water level sensing floater of the sewage drainage system according to an embodiment of the present invention is malfunctioning,FIG. 10(a) shows the interior of the reservoir, and FIG. 10(b) shows a part of the screen displayed on the control unit's display.

[0032] Referring to FIGS. 1 to 3, a sewage drainage system (1) according to one embodiment operates a pump in conjunction with the discharge flow rate according to the inflow rate or the amount of sewage stored, thereby preventing overflow and resolving in real time the phenomenon of the pump idling or blockage caused by foreign matter. When multiple pumps are arranged, sewage can be efficiently discharged according to the amount of sewage through various operating modes. In addition, by evenly distributing the operating time of multiple pumps, the lifespan of the sewage drainage system (1) can be extended by preventing excessive operation of a specific pump. Furthermore, even if a malfunction occurs in the sensor measuring the water level, the effect of preventing overflow is achieved by determining how much sewage is stored through the sensor malfunction case and operating the pump appropriately. For example, the sewage drainage system (1) may include a chamber section (11), a pump section (12), a drainage section (13), and a control section (14).

[0033] The chamber section (11) may include a reservoir (111), a wastewater inlet pipe (112), and a water level sensor module (113).

[0034] The storage tank (111) is a space in which wastewater is stored. The storage tank (111) can be made of eco-friendly PP material and can be formed into a sturdy structure with a thickness of 10 mm or more for the top and bottom plates and a thickness of 5.0 to 6.0 mm or more for the sides, and can be buried underground. Alternatively, it can be placed exposed above ground and can be formed into a sealed structure that prevents odor leakage.

[0035] The wastewater inlet pipe (112) delivers wastewater to the storage tank (111) and can be connected to the top of the storage tank (111). The wastewater inlet pipe (112) is of the DRF type (O-ring union type), is easy to attach and detach, and can be connected to a PVC or STS pipe being installed, and can be installed so as not to cause leakage.

[0036] The water level sensor module (113) may include a low water level sensing plotter (1131), a medium water level sensing plotter (1132), a high water level sensing plotter (1133), and a water level sensor connector (1134). The low water level sensing plotter (1131) can measure the low water level of wastewater in the reservoir (111) through its floating status and degree of floating. The medium water level sensing plotter (1132) is positioned above the low water level sensing plotter (1131) and can measure the medium water level of wastewater in the reservoir (111) through its floating status and degree of floating. The high water level sensing plotter (1133) is positioned above the medium water level sensing plotter (1132) and can measure the high water level of wastewater in the reservoir (111) through its floating status and degree of floating. The water level sensor connector (1134) can connect a low water level sensing plotter (1131), a medium water level sensing plotter (1132), and a high water level sensing plotter (1133).

[0037] The pump unit (12) is positioned inside the chamber unit (11) and can grind foreign substances contained in the wastewater stored in the chamber unit (11) while simultaneously discharging the wastewater and foreign substances. Meanwhile, the pump unit (12) may be composed of a single pump, but may also be composed of two first pumps (12a) and a second pump (12b), or may be composed of three or more pumps, although not shown in the drawing. Multiple pumps may be operated in a simultaneous operation mode, an alternating operation mode, or a simultaneous stop mode. For example, the pump unit (12) may include a base (121), a cutter (122), an impeller (123), a sealing member (124), a housing (125), a motor assembly (126), a rotor assembly (127), an inlet (128), and an outlet (129).

[0038] A base (121) may be positioned on one side of a reservoir (111) and may have an opening formed therein to allow wastewater to flow through it. For example, the base (121) may be positioned on the bottom surface of the reservoir (111), and wastewater and foreign substances may move together into the interior of the base (121) through the opening.

[0039] The cutter (122) can crush foreign substances contained in the wastewater by rotating rapidly.

[0040] The impeller (123) can cause flow motion to move wastewater to the cutter (122). The impeller (123) can be formed with a blade structure so that foreign matter does not get caught during operation, and the blade portion of the impeller (123) can be designed to minimize fluid flow resistance, for example, as in the HELIX II VANE IMPELLER.

[0041] The motor assembly (126) can rotate the cutter (122) and the impeller (123). The rotor assembly (127) is connected to the cutter (122) and the impeller (123) and can transmit the rotational motion of the motor assembly (126). For example, the motor assembly (126) can be protected by a ‘motor smart protection device’ built into the wastewater drainage system (1). The ‘motor smart protection device’ is linked to the main controller (141) of the control unit (14) to protect against phase loss of the pump unit (12) (i.e., correct the phase imbalance state of multiple pumps), prevent idle operation of the pump unit (12), prevent overload or overcurrent, or eliminate foreign matter jamming in the pump unit (12).

[0042] The inlet port (128) is an opening through which wastewater flows from the base (121) into the interior of the pump unit (12). The outlet port (129) can discharge wastewater containing ground foreign matter.

[0043] The drainage section (13) is connected to the pump section (12) and serves as a flow path for draining wastewater and foreign substances from the pump section (12). The drainage section (13) may include a first discharge pipe (131a) connected to the first pump (12a), a first valve (132a) for controlling the opening and closing of the first discharge pipe (131a), a second discharge pipe (131b) connected to the second pump (12b), a second valve (132b) for controlling the opening and closing of the second discharge pipe (131b), and a combined discharge pipe (133) where the first discharge pipe (131a) and the second discharge pipe (131b) merge.

[0044] The control unit (14) may include a main controller (141), a pump control module (142) that controls the operation of the pump unit (12), an operation mode control module (143) that converts the operation of the pump unit (12) into manual or automatic operation modes, a current sensor (144) that measures the current flowing within the pump unit (12), a chamber sensor (145), a temperature and humidity sensor (146) that measures the temperature and humidity around the wastewater drainage system (1), and a display (147) that indicates the current state and operation state of the pump unit (12) and the chamber unit (11).

[0045] The temperature and humidity sensor (146) specifically measures the temperature and humidity around the control unit (14) and displays the results through the display (147), thereby allowing the user to recognize conditions in which an excessive environmental influence occurs during the operation of the wastewater drainage system (1).

[0046] The chamber sensor (145) can be coupled with several sensors placed inside the chamber, particularly the water level sensor module (113), to display the water level on the display.

[0047] The driving mode control module (143) can not only control manual and automatic modes, but also turn multiple pumps on and off individually. Additionally, the alternating driving mode can be subdivided to switch between a continuous alternating driving mode or an accumulated driving time alternating driving mode. Here, the 'accumulated driving time alternating driving mode' means alternating driving so that the total operating time of multiple pumps is equal, as described below.

[0048] The display (147) can display whether the device is running, stopped, or malfunctioning on an LCD so that the operating status can be easily identified. Additionally, the history of the malfunction is stored in memory and can be checked through the display (147). The display (1147) can quickly notify of abnormal operating conditions not only through an LCD that can be identified visually but also through warning sounds or alarms. As described below, the display (147) can enable the operator to take quick action by transmitting to the screen that the device is in overload operation when an overcurrent is detected by the main controller (141), and by transmitting to the screen that the device is in idle operation when a low current is detected. In addition, it can also transmit to the screen when an overvoltage, undervoltage, or phase loss is detected by the main controller (141).

[0049] The main controller (141) can compare the current measured by the current sensor (144) with the rated current of the pump unit (12). If the current measured by the current sensor (144) is greater than the rated current, it is determined that a blockage caused by foreign matter has occurred within the pump unit (12), and the pump control module (142) can cause the pump unit (12) to alternately repeat reverse and forward rotation operations. For example, when the pump unit (12) is in operation, if foreign matter constricts the impeller (123), the current rises higher than the rated current, and the main controller (141) detects this and can control the pump control module (142) so that reverse rotation operation continues for about 5 seconds between forward rotation operations. For example, if foreign matter constricts the impeller (123), the pump unit (12) may be stopped if it does not operate normally after repeating the sequence of reverse rotation (5 seconds), forward rotation, reverse rotation (5 seconds), forward rotation, reverse rotation (5 seconds), and forward rotation. Such alternating forward and reverse rotation operation may be referred to as a 'protection device processor,' and the operation of the pump unit (12) is stopped when the current flowing through the pump unit (12) does not drop to the rated current despite the protection device processor. The 'protection device processor' may be activated when the current measurement value rises to 150% or more of the rated current. That is, the main controller (141) can prevent overvoltage or undervoltage from occurring in the pump unit (12), and such voltage or current status can be displayed through the display (147).

[0050] Meanwhile, the main controller (141) determines that idle operation has occurred in the pump unit (12) when the current measured by the current sensor (144) is less than the rated current and the water level of the wastewater detected by the water level sensor module (113) is at a low water level or a low water level, and can stop the pump unit (12) by the pump control module (142). At this time, the pump unit (12) may be stopped after 20 seconds after idle operation is detected, may be restarted after being stopped for 15 minutes, and may be stopped again if idle operation is detected during restart. Here, 'low water level' means a state in which there is no wastewater at all in the reservoir (111), including water levels not detected by the low water level sensing plotter (1131), and 'idle operation' means that the pump unit (12) is operated in a state without wastewater.

[0051] Additionally, the main controller (141) can detect the number of operations and operating time of the first pump (12a) and the second pump (12b), respectively, and compare the total operating time of the first pump (12a) and the total operating time of the second pump (12b). The operating time of each of the multiple pumps may differ significantly in total operating time due to the alternating operation mode, various mechanical defects, or manual operation. In this case, if only a specific pump is operated excessively, the lifespan of the entire system may be negatively affected, and the pumping efficiency may decrease; therefore, a mechanism to correct this may be activated. For example, if the main controller (141) compares the total operating time of the first pump (12a) and the total operating time of the second pump (12b), and the total operating time of one pump is longer, the pump control module (142) can be controlled so that the pump with the shorter total operating time is operated before the pump with the longer total operating time in the alternating operation mode.

[0053] Referring to FIGS. 4 through 10, the main controller (141) can determine whether there is a problem with the water level sensor module (113). For example, the main controller (141) determines that there is a problem with the water level sensor module (113) if a plotter detecting a relatively low water level does not detect the water level, and a plotter detecting a higher water level sends a signal that it detects the water level. For example, (i) when a low water level is not detected by the low water level sensing plotter (1131), a medium water level is detected by the medium water level sensing plotter (1132), and a high water level is detected by the high water level sensing plotter (1133), the pump control module (142) is controlled to operate the first pump (12a) and the second pump (12b) in a simultaneous operation mode, and the display (147) can display a high water level alarm and a low water level sensing plotter error (S05 in FIG. 4 and (a) and (b) in FIG. 8). Additionally, (ii) when a low water level is not detected by the low water level sensing plotter (1131), a medium water level is not detected by the medium water level sensing plotter (1132), and a high water level is detected by the high water level sensing plotter (133), the pump control module is controlled to operate the first pump (12a) and the second pump (12b) in a simultaneous operation mode, and the display (147) can display a high water level alarm and an abnormality of the low water level sensing plotter and the medium water level sensing plotter (S06 in FIG. 4 and (a) and (b) in FIG. 9). In addition, (iii) when the low water level is not detected by the low water level sensing plotter (1131), the medium water level is detected by the medium water level sensing plotter (1132), and the high water level is not detected by the high water level sensing plotter (1133), the pump control module (142) is controlled to operate the first pump (12a) and the second pump (12b) in an alternating operation mode, and the display (147) can display a medium water level alarm and a low water level sensing plotter error (S07 in FIG. 4 and (a) and (b) in FIG. 10).Meanwhile, in this case, since the possibility of a malfunction in the high-level sensing floater (1133) cannot be ruled out, a water pressure sensor may be placed on the upper side of the reservoir (111) (at a position equal to or higher than the high-level sensing floater (1133)), and if a water level higher than the medium water level is detected by the water pressure sensor, it can be determined that there is a malfunction in the high-level sensing floater (1133). That is, when the low water level is not detected by the low water level sensing plotter (1131), the medium water level is detected by the medium water level sensing plotter (1132), the high water level is not detected by the high water level sensing plotter (1133), and the high water level is detected by the water pressure sensor, the control unit (14) controls the pump control module (142) to operate the first pump (12a) and the second pump (12b) in a simultaneous operation mode, and the display (147) can display a high water level alarm, a low water level sensing plotter, and a high water level sensing plotter.

[0054] The main controller (141) can determine whether the water level is high and operate the first pump (12a) and the second pump (12b) simultaneously if there is no abnormality in the water level sensor module (113) (S01 in FIG. 4), determine whether the water level is medium and operate the first pump (12a) and the second pump (12b) alternately if the water level is not high (S02 in FIG. 4), determine whether the water level is low and operate the first pump (12a) and the second pump (12b) alternately or stop both (S03 in FIG. 4). Additionally, if the water level is not low, determine whether the water level is low and stop both the first pump (12a) and the second pump (12b) (S04 in FIG. 4).

[0056] The effects obtainable from the embodiments are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by a person skilled in the art based on the detailed description below.

[0058] The various embodiments described above may be embodied in other specific forms without departing from the technical idea and essential features. Accordingly, the above detailed description should not be interpreted restrictively in all respects but should be considered exemplary. The scope of the various embodiments shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the various embodiments are included within the scope of the various embodiments. Furthermore, embodiments may be constructed by combining claims that do not have an explicit citation relationship in the patent claims, or they may be included as new claims through amendments made after filing. Explanation of the symbols

[0059] 1: Sewage drainage system 11: Chamber section 111: Retention basin 112: Sewage inlet pipe 113: Water level sensor module 1131: Low water level sensing floater 1132: Medium water level sensing plotter 1133: High-level sensing plotter 12: Pump section 12a: First pump 12b: Second pump 121: Bass 122: Cutter 123: Impeller 124: Sealing member 125: Housing 126: Motor Assembly 127: Rotor Assembly 128: Inlet 129: Outlet 13: Drainage section 131a: First discharge pipe 131b: Second discharge pipe 132a: First valve 132b: Second valve 133: Collective discharge pipe 14: Control unit 141: Main Controller 142: Pump Control Module 143: Driving Mode Control Module 144: Current sensor 145: Chamber sensor 146: Temperature and humidity sensor 147: Display

Claims

Claim 1 A chamber section including a storage tank in which wastewater flowing in from a wastewater inlet pipe is stored until discharged; a pump section disposed inside the chamber section and simultaneously grinding foreign substances contained in the wastewater stored inside the chamber section and discharging the wastewater and the foreign substances; and a control section for controlling the water level of the wastewater inside the storage tank, wherein the control section includes a current sensor for measuring the current flowing inside the pump section; and a pump control module for controlling the operation of the pump section. and includes a main controller that compares the current measured by the current sensor with the rated current of the pump unit; the main controller determines that a blockage caused by foreign matter has occurred within the pump unit when the current measured by the current sensor is greater than the rated current, and controls the pump unit to alternately repeat reverse and forward rotation operations by the pump control module, wherein the reverse rotation operation is sustained for 5 seconds between forward rotation operations; the chamber unit further includes a water level sensor module comprising a low water level sensing floater for sensing the low water level of the wastewater in the reservoir, a medium water level sensing floater for sensing the medium water level, and a high water level sensing floater for sensing the high water level; the main controller determines that idling has occurred in the pump unit when the current measured by the current sensor is less than the rated current and the water level of the wastewater detected by the water level sensor module is a low water level or a low water level, stops the pump unit through the pump control module 20 seconds after the time when idling is detected, and from the time when the pump unit is stopped After maintaining a stopped state for 15 minutes, the pump unit is restarted, and if idling is detected again during the restart, the pump unit is controlled to stop again; the pump unit is composed of a plurality of pumps as a first pump and a second pump, and the first pump and the second pump are operated in a simultaneous operation mode, an alternating operation mode, or a simultaneous stop mode, and the main controller,The number of operations and operating time of the first pump and the second pump are each detected, and the operating time includes reverse operation and forward operation times. By comparing the total operating time of the first pump and the total operating time of the second pump, the pump control module is controlled so that in the alternating operation mode, the pump with a shorter total operating time is operated before the pump with a longer total operating time, thereby operating the plurality of pumps evenly so that the total operating times of the plurality of pumps become equal. The control unit further includes a display indicating the current state and operating state of the pump unit and the chamber unit. (i) When a low water level is not detected by the low water level sensing plotter, a medium water level is detected by the medium water level sensing plotter, and a high water level is detected by the high water level sensing plotter, the pump control module is controlled to operate the first pump and the second pump in a simultaneous operation mode, and the display indicates a high water level alarm and a low water level sensing plotter malfunction. (ii) When a low water level is not detected by the low water level sensing plotter, the (iii) When the medium water level is not detected by the medium water level sensing plotter and the high water level is detected by the high water level sensing plotter, the pump control module is controlled to operate the first pump and the second pump in a simultaneous operation mode, and the display shows a high water level alarm and an abnormality of the low water level sensing plotter and the medium water level sensing plotter; (iii) When the low water level is not detected by the low water level sensing plotter and the medium water level is detected by the medium water level sensing plotter and the high water level is not detected by the high water level sensing plotter, the pump control module is controlled to operate the first pump and the second pump in an alternating operation mode, and the display shows a medium water level alarm and an abnormality of the low water level sensing plotter; (iv) A water pressure sensor is placed on the upper side of the reservoir at a position equal to or higher than the high water level sensing plotter, andWhen a low water level is not detected by the low water level sensing plotter, a medium water level is detected by the medium water level sensing plotter, a high water level is not detected by the high water level sensing plotter, and a high water level is detected by the water pressure sensor, the pump control module is controlled to operate the first pump and the second pump in a simultaneous operation mode, and the display displays a high water level alarm, a low water level sensing plotter, and a high water level sensing plotter malfunction, and the main controller controls the pump control module to operate the first pump and the second pump in the simultaneous operation mode when: (i) a low water level is not detected by the low water level sensing plotter, a medium water level is detected by the medium water level sensing plotter, and a high water level is detected by the high water level sensing plotter; and (ii) a low water level is not detected by the low water level sensing plotter, a medium water level is not detected by the medium water level sensing plotter, and a high water level is detected by the high water level sensing plotter A sewage drainage system having a pump unit with a built-in anti-clogging function, characterized by controlling the pump control module to operate the first pump and the second pump in the simultaneous operation mode when detected, (iii) when the low water level is not detected by the low water level sensing plotter, the medium water level is detected by the medium water level sensing plotter, and the high water level is not detected by the high water level sensing plotter, the pump control module to operate the first pump and the second pump in the alternating operation mode.

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