JP7023506B2 - Drainage device - Google Patents

Description

The present invention relates to a drainage device for draining water stored in a water storage tank or the like.

As a drainage device used for sending sewage or the like, a technique of using a submersible pump device in which a motor and a pump are provided at the lower end of a head in which a control device is housed is known. The submersible pump device is equipped with a water level detection sensor, detects the liquid level of sewage, and controls drive and stop. As the water level detection device, for example, a float switch is used (see, for example, Patent Document 1).

Further, there is known a technique of providing a plurality of wireless communication units in one pump and controlling the water level by utilizing the property that wireless communication cannot be performed underwater (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 2003-286990 JP-A-2017-207030

The automatic operation type submersible pump device using a float switch has the following problems. That is, since the float switch has a certain size, when the submersible pump device is installed in a narrow installation place, there is a possibility that an accurate water level cannot be detected due to contact with a power cable, a pipe, or the like. Further, when a water level detection device other than the float switch is used, there is a risk that the cost of the water level detection device itself and the manufacturing cost will increase due to the installation work.

Therefore, an object of the present invention is to provide a drainage device capable of eliminating the water level detection device and reducing the parts cost and the manufacturing cost.

One embodiment of the present invention is arranged in a water storage tank, and is arranged at a height position corresponding to a reference water level in the water storage tank in a drainage device for draining water in the water storage tank to the outside of the water storage tank. A first pump device having a first communication unit, a second pump device having a second communication unit that continuously or intermittently communicates with the first communication unit, and the first communication unit. When transmission / reception is not performed between the second communication unit, at least one of the first pump device and the second pump device is started, and the first communication unit and the second communication unit are started. It is provided with a control unit for stopping the operating pump device among the first pump device and the second pump device when transmission / reception is performed between the first pump device and the second pump device.

Therefore, the present invention makes it possible to eliminate the water level detection device and reduce the parts cost and the manufacturing cost.

Explanatory drawing which shows the drainage apparatus which concerns on one Embodiment of this invention. The flow chart which shows an example of the alternate operation operation of the drainage device. The flow chart which shows an example of the stop condition judgment operation in the alternate operation operation of the drainage device. The flow diagram which shows an example of the alternate / parallel operation operation of the drainage device. The flow diagram which shows an example of the stop condition judgment operation in the alternate / parallel operation operation of the drainage device.

FIG. 1 is an explanatory diagram showing a configuration of a drainage device 10 according to an embodiment of the present invention. In FIG. 1, 100 indicates a water storage tank, and 200 indicates a discharge pipe. In FIG. 1, L indicates a reference water level that is a reference for starting / stopping the operation of the pump.

The drainage device 10 includes a pair of pump devices 20A and a pump device 20B arranged in the water storage tank 100. Note that 90 in FIG. 1 shows a portable information terminal capable of grasping the operating state of the drainage device 10 by communication with the communication unit 34A and the communication unit 34B. As the information terminal, a smartphone, a tablet, a laptop computer, or the like can be used. The pump devices 20A and 20B are formed so that the water stored in the water storage tank 100 can be pumped toward the external pipe 200.

The pump device 20A includes a cylindrical housing 21A, a pump 22A provided at the lower part of the housing 21A, a motor 23A provided in the housing 21A to drive the pump 22A, and an upper part of the housing 21A. It is provided with an electrical component 30A provided.

The pump 22A sucks up the water in the water storage tank 100 from the opening 22a provided in the lower part of the housing 21A, and discharges the water from the discharge port 22b.

The electrical component unit 30A includes a control unit 31A, an inverter 32A, a temperature detection sensor 33A, a communication unit 34A, and a time measurement unit 35A. The control unit 31A, the inverter 32A, the temperature detection sensor 33A, the communication unit 34A, and the time measurement unit 35A are connected by a system bus. The control unit 31A controls based on the output value of the communication unit 34A according to a predetermined program. The control unit 31A can switch between the "constant frequency mode" and the "constant current value mode" as needed. The program for operating the control unit 31A causes the drainage device 10 to execute either alternate operation or alternate parallel operation as described later. Further, the control unit 31A measures the operation time of the motor 23A and stores it as the integrated operation time. Further, the control unit 31A stores a unique identification number for identifying the pump 22A. The inverter 32A drives the motor 23A and transmits information on the current applied to the motor 23A and the operating frequency of the motor 23A to the control unit 31A. The temperature detection sensor 33A measures the internal temperature of the electrical component unit 30A. The communication unit 34A is installed at a height of the reference water level L. The communication unit 34A communicates with the communication unit 34B of the other pump device 20B, that is, a status signal, that is, a signal indicating the state of the own machine (run / stop state, timer value, etc.), and permission to operate the other machine. Alternatively, a signal or the like indicating prohibition is communicated. The time measuring unit 35A measures the integrated operating time of the pump 22A, the time defined by the operating time from the start, and the like.

The pump device 20B includes a cylindrical housing 21B, a pump 22B provided at the lower part of the housing 21B, a motor 23B provided in the housing 21B to drive the pump 22B, and an upper part of the housing 21B. It is provided with an electrical component 30B provided.

The pump 22B sucks up the water in the water storage tank 100 from the opening 22a provided in the lower part of the housing 21B, and discharges the water from the discharge port 22b.

The electrical component unit 30B includes a control unit 31B, an inverter 32B, a temperature detection sensor 33B, a communication unit 34B, and a time measurement unit 35B. The control unit 31B, the inverter 32B, the temperature detection sensor 33B, the communication unit 34B, and the time measurement unit 35B are connected by a system bus. The control unit 31B controls based on the output value of the communication unit 34B according to a predetermined program. The control unit 31B can switch between the "constant frequency mode" and the "constant current value mode" as needed. The program for operating the control unit 31B causes the drainage device 10 to execute either alternate operation or alternate parallel operation as described later. Further, the control unit 31B measures the operation time of the motor 23B and stores it as the integrated operation time. Further, the control unit 31B stores a unique identification number for identifying the pump 22B. The inverter 32B drives the motor 23B and transmits information on the current applied to the motor 23B and the operating frequency of the motor 23B to the control unit 31B. The temperature detection sensor 33B measures the internal temperature of the electrical component unit 30B. The communication unit 34B is installed at a height of the reference water level L. The communication unit 34B communicates with the communication unit 34A of the other pump device 20A, that is, a status signal, that is, a signal indicating the state of the own machine (run / stop state, timer value, etc.), and permission to operate the other machine. Alternatively, a signal or the like indicating prohibition is communicated. The time measuring unit 35B measures the integrated operating time of the pump 22B, the operating time from the start, and the like.

The information terminal 90 acquires the operating state (operation / stop / failure state, etc.) of each pump device 20 by communicating with the communication unit 34A and the communication unit 34B of each pump device 20A and the pump device 20B described above. It is displayed on the display unit 91.

The communication unit 34A of the pump device 20A and the communication unit 34B of the pump device 20B continuously or intermittently communicate the state signal, and the frequency at this time is, for example, in the range of 100 MHz or more. Signals with frequencies in this range are blocked by water.

Water flows into the water storage tank 100 from the outside. The reference water level L is a stop water level at which all the pump devices 20A and 20B are stopped.

Hereinafter, the drainage operation performed by the drainage device 10 configured in this way will be described. First, the alternate operation operation will be described with reference to the flow charts of FIGS. 2 and 3. The alternating operation operation is an operation in which only one of the pump devices 20A and 20B is operated. In this example, it is assumed that the pump device 20A operates first, and then the pump device 20B operates. This order can be appropriately determined. For example, the person who starts first may compare the integrated operation time and use the shorter one. Alternatively, they may be started alternately. Of course, it may be random and can be appropriately determined.

When the user turns on the power, the control unit 31A and the control unit 31B are activated (step ST10). The control unit 31A and the control unit 31B start wireless communication and perform initial settings (step ST11). At this time, information communication to the information terminal 90 is started, and the operating status of the pump device 20A and the pump device 20B is displayed on the display unit 91. The control unit 31A confirms that the operation of the pump 22A has stopped (step ST12). As a result, the control unit 31A permits the pump 22A to operate. The control unit 31A determines whether or not radio reception is being performed by the communication unit 34A (step ST13). In this case, if the radio reception is not performed, it is determined that the liquid level of the water storage tank 100 exceeds the reference water level L. If the control unit 31A determines that the liquid level of the water storage tank 100 exceeds the reference water level L without radio reception, the pump 22A is started (step ST14).

Next, the control unit 31A determines whether or not radio reception is being performed by the communication unit 34A as the first step of the stop condition (step ST15). In this case, if radio reception is performed, it is determined that the liquid level of the water storage tank 100 has fallen below the reference water level L. At this time, the control unit 31A transmits the operation information of the pump 22A from the communication unit 34A to the control unit 31B of the pump device 20B. Next, the control unit 31A determines whether or not the second stage of the stop condition is satisfied (step ST16). The determination flow in step ST16 will be described with reference to steps ST16a to ST16b shown in FIG.

The control unit 31A determines whether or not the temperature of the temperature detection sensor 33A is equal to or higher than the set temperature (step ST16a). If the temperature is lower than the set temperature, the control unit 31A proceeds to step ST16b (No in step ST16a), and if the temperature is higher than the set temperature, the control unit 31A proceeds to step ST17 (Yes in step ST16a).

The control unit 31A determines whether or not the current applied to the motor 23A is equal to or less than the set current (in the case of the constant current value mode), or whether or not the operating frequency of the motor 23A is equal to or higher than the set frequency (in the case of the constant frequency mode). (Step ST16b). Then, if the current exceeds the set current or is lower than the set frequency, the control unit 31A returns to step ST16b (No in step ST16b), and if it is below the set current or above the set frequency, the control unit 31A returns. Proceed to step ST17 (Yes in step ST16b).

The stop condition in step ST16 is that the water level is lower than the reference water level L and the pump 22A is idling. That is, when the pump 22A is idling, the current value supplied to the motor 23A that drives the pump 22A becomes a value smaller than the current value at the time of pumping, and the rotation speed increases. Further, since the pump 22A is not immersed in water, the temperature rises.

Returning to the description of FIG.
The control unit 31A stops the pump 22A (step ST17). As a result, the control unit 31A prohibits the operation of the pump 22A. The control unit 31A transmits the information that the pump 22A has stopped from the communication unit 34A to the control unit 31B of the pump device 20B (step ST18). The control unit 31A confirms that the pump 22A has stopped and stands by (step ST18).

The control unit 31A waits until the next wireless communication disappears (step ST19), and then waits until the wireless communication resumes (step ST20). When the wireless communication is resumed, the control unit 31A confirms that the operation of the pump 22A has stopped, and returns to step ST12 (step ST21). As a result, the control unit 31A permits the pump 22A to operate.

On the other hand, the control unit 31B starts wireless communication and performs initial setting (step ST31). The control unit 31B confirms that the operation of the pump 22B has stopped (step ST32). As a result, the control unit 31B prohibits the operation of the pump 22B. The control unit 31B determines whether or not radio reception is being performed by the communication unit 34B (step ST33). In this case, if the radio reception is not performed, it is determined that the liquid level of the water storage tank 100 exceeds the reference water level L.

When the control unit 31B determines that the radio reception is started and the liquid level of the water storage tank 100 has lowered the reference water level L, the pump 22A receives a stop signal as described above (step ST35). As a result, the control unit 31B permits the pump 22B to operate, and the pump to be operated switches from the pump 22A to the pump 22B.

The control unit 31B determines whether or not radio reception is being performed by the communication unit 34B (step ST36). In this case, if the radio reception is not performed, it is determined that the liquid level of the water storage tank 100 exceeds the reference water level L. If the control unit 31B determines that the liquid level of the water storage tank 100 exceeds the reference water level L without radio reception, the pump 22B is started (step ST37).

Next, the control unit 31B determines whether or not radio reception is being performed by the communication unit 34B as the first step of the stop condition (step ST38). In this case, if radio reception is performed, it is determined that the liquid level of the water storage tank 100 has fallen below the reference water level L. Next, the control unit 31B determines whether or not the second condition of the stop condition is satisfied, and if the stop condition is satisfied, the process proceeds to step ST39. Since step ST39 has the same operation as step ST16 described above, details thereof will be omitted.

The stop condition in step ST39 is that the water level is lower than the reference water level L and the pump 22B is idling. That is, when the pump 22B is idling, the current value supplied to the motor 23B that drives the pump 22B is smaller than the current value at the time of pumping, and the rotation speed increases. Further, since the pump 22B is not immersed in water, the temperature rises.

The control unit 31B stops the pump 22B (step ST40). As a result, the control unit 31B prohibits the operation of the pump 22B. The control unit 31B transmits the information that the pump 22B has stopped from the communication unit 34B to the control unit 31A of the pump device 20A (step ST41), and returns to step 32. As a result, the control unit 31B switches the pump to be operated from the pump 22B to the pump 22A.

In the drainage device 10, when such control is performed, the pump device 20A satisfies the start condition and starts, and then when the stop condition is satisfied, the pump device 20A is prohibited from operation and the operation of the pump device 20B is permitted. Become. Then, after the pump device 20B satisfies the start condition and starts, when the stop condition is satisfied, the operation of the pump device 20B is prohibited and the operation of the pump device 20A is permitted. By repeating such a cycle, the pair of pump devices 20A and the pump device 20B are alternately operated.

When the pair of pump devices 20A and the pump devices 20B operate alternately in this way, the drainage device 10 detects the water level, which is the reference for starting / stopping the pump device 20A and starting / stopping the pump device 20B, with the communication unit 34A. This can be done depending on whether or not transmission / reception is performed with the communication unit 34B. Therefore, the pump device 20A and the pump device 20B can be started and stopped without using the water level detection sensor.

Next, the alternate parallel operation operation will be described with reference to the flow charts shown in FIGS. 4 and 5. The alternate parallel operation operation is an operation in which both are operated when the reference water level L is exceeded. Of the pump devices 20A and 20B, the one that starts first is the main engine (with start priority), and the one that starts later is the slave unit (without start priority). The main engine and the slave unit can be switched as described later, and when the power is turned on, the integrated operation time, randomness, alternating, etc. can be appropriately determined.

When the user turns on the power, the control unit 31A and the control unit 31B are activated (step ST60). Here, the pump device 20A is the main engine. The control unit 31A and the control unit 31B start wireless communication and perform initial settings (step ST61). At this time, information communication to the information terminal 90 is started, and the operating status of the pump device 20A and the pump device 20B is displayed on the display unit 91. The control unit 31A confirms that the operation of the pump 22A has stopped (step ST62). As a result, the control unit 31A permits the operation of the pump 22A, which is the main engine. The control unit 31A determines whether or not radio reception is being performed by the communication unit 34A (step ST63). In this case, the control unit 31A determines that the liquid level of the water storage tank 100 exceeds the reference water level L unless wireless reception is performed between the communication unit 34A and the communication unit 34B. If the control unit 31A determines that the liquid level of the water storage tank 100 exceeds the reference water level L without radio reception, the pump 22A is started (step ST64).

Next, the control unit 31A determines whether or not radio reception is being performed by the communication unit 34A by transmitting a signal for confirming each other's operating status as the first step of the stop condition (step). ST65). In this case, if radio reception is performed, it is determined that the liquid level of the water storage tank 100 has fallen below the reference water level L. The control unit 31A and the control unit 31B transmit and receive each other's operating status via the communication unit 34A and the communication unit 34B. Next, the control unit 31A determines whether or not the second stage of the stop condition is satisfied (step ST66). The determination flow in step ST66 will be described with reference to steps ST66a to ST66b shown in FIG.

The control unit 31A determines whether or not the temperature of the temperature detection sensor 33A is equal to or higher than the set temperature (step ST66a). If the temperature is lower than the set temperature, the control unit 31A proceeds to step ST66b (No in step ST66a), and if the temperature is higher than the set temperature, the control unit 31A proceeds to step ST67 (Yes in step ST66a).

The control unit 31A determines whether or not the current applied to the motor 23A is equal to or less than the set current (in the case of the constant current value mode), or whether or not the operating frequency of the motor 23A is equal to or higher than the set frequency (in the case of the constant frequency mode). (Step ST66b). Then, if the current exceeds the set current or is lower than the set frequency, the control unit 31A returns to step ST66b (No in step ST66b), and if it is below the set current or above the set frequency, the control unit 31A returns. Proceed to step ST17 (Yes in step ST66b).

The stop condition in step ST66 is that the water level is lower than the reference water level L and the pump 22A is idling. That is, when the pump 22A is idling, the current value supplied to the motor 23A that drives the pump 22A becomes a value smaller than the current value at the time of pumping, and the rotation speed increases. Further, since the pump 22A is not immersed in water, the temperature rises.

Returning to the description of FIG.
The control unit 31A stops the pump 22A (step ST67). As a result, the control unit 31A grants the pump 22A an operation permit without a start priority. The control unit 31A determines that there is wireless communication and stands by (step ST68). At this time, the control unit 31A and the control unit 31B transmit and receive each other's operating status via the communication unit 34A and the communication unit 34B.

The control unit 31A waits until the next wireless communication is lost (step ST69). At this time, the control unit 31A and the control unit 31B transmit and receive each other's operating status via the communication unit 34A and the communication unit 34B. Subsequently, when wireless communication is stopped, for example, a timer measurement for 3 minutes is performed, and when it is continuously determined that there is no wireless communication (step ST70), the pump 22A is started and parallel operation is started (step ST71). ..

Next, the control unit 31A determines whether or not radio reception is being performed by the communication unit 34A by transmitting a signal for confirming each other's operating status as the first step of the stop condition (step). ST72). In this case, if radio reception is performed, it is determined that the liquid level of the water storage tank 100 has fallen below the reference water level L. The control unit 31A and the control unit 31B transmit and receive each other's operating status via the communication unit 34A and the communication unit 34B. Next, the control unit 31A determines whether or not the second stage of the stop condition is satisfied (step ST73). Since step ST73 has the same operation as step ST66 described above, details thereof will be omitted.

The stop conditions in steps 72 and ST73 are that the water level is lower than the reference water level L and that the pump 22A is idling. That is, when the pump 22A is idling, the current value supplied to the motor 23A that drives the pump 22A becomes a value smaller than the current value at the time of pumping, and the rotation speed increases. Further, since the pump 22A is not immersed in water, the temperature rises.

The control unit 31A stops the pump 22A (step ST74). As a result, the control unit 31A grants the pump 22A an operation permit having a start priority. The control unit 31A determines that there is wireless communication and stands by (step ST75). At this time, the control unit 31A and the control unit 31B transmit and receive each other's operating status via the communication unit 34A and the communication unit 34B. Then, the control unit 31A returns to step 62.

On the other hand, the control unit 31B confirms that the operation of the pump 22B has stopped (step ST82). As a result, the control unit 31B grants the operation permission of the subordinate pump 22B without the start priority. The control unit 31B determines whether or not radio reception is being performed by the communication unit 34B (step ST83). Subsequently, when wireless communication is stopped, for example, a timer measurement for 3 minutes is performed, and when it is continuously determined that there is no wireless communication (step ST84), the pump 22B is started and parallel operation is started (step ST85). ..

Next, the control unit 31B determines whether or not radio reception is being performed by the communication unit 34B by transmitting a signal for confirming each other's operating status as the first step of the stop condition (step). ST86). In this case, if radio reception is performed, it is determined that the liquid level of the water storage tank 100 has fallen below the reference water level L. The control unit 31B and the control unit 31A transmit and receive each other's operating status via the communication unit 34B and the communication unit 34A. Next, the control unit 31B determines whether or not the second stage of the stop condition is satisfied (step ST87). Since step ST87 has the same operation as step ST66 described above, details thereof will be omitted.

The stop condition in step ST87 is that the water level is lower than the reference water level L and the pump 22B is idling. That is, when the pump 22B is idling, the current value supplied to the motor 23B that drives the pump 22B is smaller than the current value at the time of pumping, and the rotation speed increases. Further, since the pump 22B is not immersed in water, the temperature rises.

The control unit 31B stops the pump 22B (step ST88). As a result, the control unit 31B grants the pump 22B an operation permit having a start priority. The control unit 31B determines that there is wireless communication and stands by (step ST89). At this time, the control unit 31B and the control unit 31A transmit and receive each other's operating status via the communication unit 34B and the communication unit 34A.

The control unit 31B waits until the next wireless communication is lost (step ST90). At this time, the control unit 31B and the control unit 31A transmit and receive each other's operating status via the communication unit 34B and the communication unit 34A. When the control unit 31B determines that there is no wireless communication, the control unit 31B starts the pump 22B (step ST91).

Next, the control unit 31B determines whether or not radio reception is being performed by the communication unit 34B by transmitting a signal for confirming each other's operating status as the first step of the stop condition (step). ST92). In this case, if radio reception is performed, it is determined that the liquid level of the water storage tank 100 has fallen below the reference water level L. The control unit 31B and the control unit 31A transmit and receive each other's operating status via the communication unit 34B and the communication unit 34A. Next, the control unit 31B determines whether or not the second stage of the stop condition is satisfied (step ST93). Since step ST93 has the same operation as step ST66 described above, details thereof will be omitted.

The stop condition in step 92 and ST93 is that the water level is lower than the reference water level L and the pump 22B is idling. That is, when the pump 22B is idling, the current value supplied to the motor 23B that drives the pump 22B is smaller than the current value at the time of pumping, and the rotation speed increases. Further, since the pump 22B is not immersed in water, the temperature rises.

The control unit 31B stops the pump 22B (step ST94). As a result, the control unit 31B grants the pump 22B an operation permit without a start priority. The control unit 31B determines that there is wireless communication and stands by (step ST95). At this time, the control unit 31B and the control unit 31A transmit and receive each other's operating status via the communication unit 34B and the communication unit 34A. Then, the control unit 31B returns to step ST82.

When the pair of pump devices 20A and the pump devices 20B are operated in alternating parallel operation in this way, the drainage device 10 detects the water level as a reference for starting / stopping the pump device 20A and starting / stopping the pump device 20B in the alternating parallel operation. Can be performed depending on the presence or absence of communication between the communication unit 34A and the communication unit 34B. Therefore, the pump device 20A and the pump device 20B can be started and stopped without using the water level detection sensor.

As described above, in the drainage device 10 according to the present embodiment, it is possible to reduce the component cost and the manufacturing cost by not using the water level detection sensor. Further, even when installed in a narrow space, it is possible to prevent the water level detection sensor such as a float switch from interfering with the wiring, and accurate detection is possible.

In the above-described embodiment, the alternate operation or the alternate parallel operation of the two pump devices has been described, but if the water level detection is controlled by using the presence or absence of communication, three or more pump devices may be used. It may be linked and controlled.

The present invention is not limited to the above embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, in which case the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent elements are deleted can be extracted as an invention.
The following is a description equivalent to the invention described in the claims of the original application of the present application.
[1]
In a drainage device arranged in a water storage tank and draining water in the water storage tank to the outside of the water storage tank.
A first pump device having a first motor and a first communication unit arranged at a height position corresponding to a reference water level in the water storage tank, and a first pump device.
A second pump device having a second motor and a second communication unit that continuously or intermittently communicates with the first communication unit.
When transmission / reception is not performed between the first communication unit and the second communication unit, at least one of the first pump device and the second pump device is started, and the first communication unit is started. And a control unit that stops the operating motor of the first motor and the second motor when transmission / reception is performed between the first motor and the second communication unit.
A drainage device equipped with.
[2]
The first pump device and the second pump device each measure a temperature detection sensor that measures the temperature inside the housing, a current measuring unit that measures the current applied to the motor, and an operating frequency of the motor. It is provided with a storage unit for storing an operating frequency measuring unit, a predetermined temperature set in the temperature detection sensor, a set current value in the current measuring unit, and a set frequency in the operating frequency measuring unit.
The control unit stops the motor when the temperature detected by the temperature detection sensor is equal to or higher than the set temperature, the applied current is lower than the set current value, and the operating frequency is equal to or higher than the set frequency. The drainage device according to [1].
[3]
In a drainage device that is arranged in a water storage tank and controls a plurality of pump devices that drain water in the water storage tank to the outside of the water storage tank in cooperation with each other.
The motors provided in each of the plurality of pump devices and
A communication unit provided in each of the plurality of pump devices for exchanging information between the plurality of pump devices, and a communication unit.
With a control unit that starts one of the motors when transmission / reception is not performed between the communication units and stops the operating motor among the plurality of motors when transmission / reception is performed between the communication units. ,
A drainage device equipped with.
[4]
Each of the plurality of pump devices includes a temperature detection sensor that measures the temperature inside the housing, a current measuring unit that measures the current applied to the motor, and an operating frequency measuring unit that measures the operating frequency of the motor. It is provided with a storage unit that stores a set temperature in the determined temperature detection sensor, a set current value in the current measurement unit, and a set frequency in the operation frequency measurement unit.
The control unit stops the motor when the temperature detected by the temperature detection sensor is equal to or higher than the set temperature, the applied current is lower than the set current value, and the operating frequency is equal to or higher than the set frequency. The drainage device according to [3].
[5]
Each of the plurality of pump devices includes a storage unit for storing the integrated operation time of the pump device.
The drainage device according to [3], wherein the starting order of the pump devices is determined by the order based on the integrated operation time of each pump device obtained by exchanging information by the communication unit.
[6]
Each of the plurality of pump devices includes a storage unit that stores an identification number unique to the pump device.
The drainage device according to [3], wherein the starting order of the pump devices is determined by the order based on the identification number of each pump device obtained by exchanging information by the communication unit.

10 ... Drainage device, 20A, 20B ... Pump device, 21A, 21B ... Housing, 22A, 22B ... Pump, 22a ... Opening, 22b ... Discharge port, 23A, 23B ... Motor, 30A, 30B ... Electrical parts, 31A, 31B ... Control unit, 32A, 32B ... Inverter, 33A, 33B ... Temperature detection sensor, 34A, 34B ... Communication unit, 35A, 35B ... Time measurement unit, 90 ... Information terminal, 91 ... Display unit, 100 ... Water storage tank, 200 … External piping.

Claims (5)

In a drainage device arranged in a water storage tank and draining water in the water storage tank to the outside of the water storage tank.
A first pump device having a first motor and a first communication unit arranged at a height position corresponding to a reference water level in the water storage tank, and a first pump device.
A second pump device having a second motor and a second communication unit that continuously or intermittently communicates with the first communication unit.
When transmission / reception is not performed between the first communication unit and the second communication unit, at least one of the first pump device and the second pump device is started, and the first communication unit is started. And a control unit that stops the operating motor of the first motor and the second motor when transmission / reception is performed between the first motor and the second communication unit.
A drainage device equipped with. The first pump device and the second pump device each drive a temperature detection sensor that measures the temperature inside the housing and the motor, and receive information on the current applied to the motor and the operating frequency of the motor. It is equipped with an inverter that transmits to the control unit .
The control unit stops the motor when the temperature detected by the temperature detection sensor is equal to or higher than the set temperature, the applied current is equal to or lower than the set current value, and the operating frequency is equal to or higher than the set frequency. The drainage device according to claim 1. In a drainage device that is arranged in a water storage tank and controls a plurality of pump devices that drain water in the water storage tank to the outside of the water storage tank in cooperation with each other.
The motors provided in each of the plurality of pump devices and
A communication unit provided in each of the plurality of pump devices for exchanging information between the plurality of pump devices, and a communication unit.
With a control unit that starts one of the motors when transmission / reception is not performed between the communication units and stops the operating motor among the plurality of motors when transmission / reception is performed between the communication units. ,
A drainage device equipped with. Each of the plurality of pump devices includes a temperature detection sensor that measures the temperature inside the housing, and an inverter that drives the motor and transmits information on the current applied to the motor and the operating frequency of the motor to the control unit. Equipped with
The control unit stops the motor when the temperature detected by the temperature detection sensor is equal to or higher than the set temperature, the applied current is equal to or lower than the set current value, and the operating frequency is equal to or higher than the set frequency. The drainage device according to claim 3. Each of the plurality of pump devices includes a storage unit for storing the integrated operation time of the pump device.
The drainage device according to claim 3, wherein the starting order of the pump devices is determined by the order based on the integrated operation time of each pump device obtained by exchanging information by the communication unit.

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