JP2020200800A - Submerged motor-driven pump system, submerged motor-driven pump, and method of operating submerged motor-driven pump - Google Patents

Abstract

To provide a submerged motor-driven pump system which can accurately detect a water level and operate a plurality of submerged motor-driven pumps efficiently and alternately.SOLUTION: A submerged motor-driven pump system 100 is configured such that a control part 32 of a submerged motor-driven pump 3a and a control part 32 of a submerged motor-driven pump 3b detect a water level on the basis of availability of radio communication between a communication part 33 of the submerged motor-driven pump 3a and a communication part 33 of the submerged motor-driven pump 3b.SELECTED DRAWING: Figure 1

Description

The present invention relates to a submersible electric pump system, a submersible electric pump and a method of operating the submersible electric pump.

Conventionally, a submersible electric pump system is known (see, for example, Patent Document 1).

Patent Document 1 discloses a submersible pump system (submersible electric pump system) including two submersible pumps including a water level sensor and a control controller. In the submersible pump system of Patent Document 1, the water level sensor is composed of a capacitance type water level sensor having electrodes exposed to the outside of the submersible pump. Further, the control controller is configured to control the two submersible pumps to operate alternately based on the water level detected by the water level sensor.

Japanese Unexamined Patent Publication No. 2012-215176 Japanese Unexamined Patent Publication No. 2006-283739

However, in the submersible pump system of Patent Document 1, since the water level sensor is composed of a capacitance type water level sensor having an electrode exposed to the outside of the submersible pump, the electrode of the water level sensor is corroded or the electrode is electrode. There is a disadvantage that it is difficult to accurately detect the water level when dirt adheres to the water level. In this case, the electrode of the two submersible pumps is corroded or the electrode is not contaminated, and the submersible pump is operated more frequently, so that the two submersible pumps cannot be operated efficiently and alternately. There is a problem that a protrusion is generated on the outside of the submersible pump and an exterior space is required.

Further, in the pump device of Patent Document 2, since the water level sensor is composed of a float switch connected to the submersible pump body by a cable, the float is repeatedly moved in the vertical direction according to the water level, so that the cable is used. The cable is repeatedly bent at a position where it is fixedly supported by the support. Therefore, the fixed portion of the cable may be damaged due to fatigue. Further, when a plurality of pumps are prepared for automatic alternating operation, a separate configuration is required for each pump.

The present invention has been made to solve the above problems, and one object of the present invention is to detect the water level with high accuracy and to efficiently and alternately operate a plurality of submersible electric pumps. It is to provide a possible method of operating a submersible electric pump system, a submersible electric pump and a submersible electric pump.

The submersible electric pump system according to the first aspect of the present invention is provided in the first submersible electric pump including the first control unit, the second submersible electric pump including the second control unit, and the first submersible electric pump. A communication unit and a second communication unit provided in the second submersible electric pump and performing wireless communication with the first communication unit are provided, and the first control unit and the second control unit are the first communication unit and the second communication unit. It is configured to detect the water level based on the availability of wireless communication in the communication unit.

In the submersible electric pump system according to the first aspect of the present invention, as described above, the first control unit and the second control unit detect the water level based on the availability of wireless communication between the first communication unit and the second communication unit. Configure to do. As a result, unlike the case where the water level is detected by using an electrode exposed to the outside like a capacitance type water level sensor, a part protruding to the outside of the submersible pump is not provided, so no exterior space is required. , The electrodes do not corrode or become dirty, and unlike the case where the water level is detected using a float switch, the cable is not damaged, so the water level can be detected accurately based on the availability of wireless communication. can do. Here, since wireless radio waves are less likely to fly underwater, wireless communication is not possible when the first communication unit and the second communication unit are underwater. That is, the first control unit and the second control unit have the water level at which the first communication unit and the second communication unit are in the water based on the fact that the first communication unit and the second communication unit cannot perform wireless communication. Can be detected. Further, since the water level can be detected based on mutual wireless communication between the first communication unit of the first submersible electric pump and the second communication unit of the second submersible electric pump, the first submersible electric pump and the second underwater A common water level can be detected with an electric pump. As a result, when the first submersible electric pump and the second submersible electric pump are operated alternately, it is possible to prevent one of the submersible electric pumps from being operated in large numbers. As a result, the water level can be detected with high accuracy, and a plurality of submersible electric pumps can be efficiently operated alternately.

In the submersible electric pump system according to the first aspect, preferably, the first control unit and the second control unit are based on the water level detected based on the availability of wireless communication of the first communication unit and the second communication unit. It is configured to control the operation of the first submersible electric pump and the second submersible electric pump alternately. With this configuration, when a predetermined water level is detected based on the availability of wireless communication between the first communication unit and the second communication unit, one of the first submersible electric pump and the second submersible electric pump comes first. When a predetermined water level is detected again based on the availability of wireless communication after draining, the other of the first submersible electric pump and the second submersible electric pump is operated so that a plurality of submersible electric pumps are operated. Can be operated alternately.

In the submersible electric pump system according to the first aspect, preferably, the first control unit and the second control unit are operated during alternate operation based on the wireless communication between the first communication unit and the second communication unit. And is configured to determine the order of pauses. With this configuration, unlike the case where the timing of operation and suspension during alternate operation is independently determined by each of the plurality of submersible electric pumps, operation and suspension during alternate operation are performed by mutual communication. Since the order of the above can be determined, it is possible to prevent the first submersible electric pump and the second submersible electric pump from being operated and stopped at the same timing. As a result, a plurality of submersible electric pumps can be reliably operated alternately. Further, unlike the conventional submersible electric pump that performs alternating operation, the first submersible electric pump and the second submersible electric pump can have the same configuration, so that the configuration of a plurality of submersible electric pumps becomes complicated. It can be suppressed.

In this case, preferably, the first control unit and the second control unit are the first submersible electric pump and the second submersible electric pump according to the order of transmitting and receiving signals by wireless communication of the first communication unit and the second communication unit. It is configured to determine the order of operation and deactivation during alternating pump operations. With this configuration, it is not necessary to wirelessly communicate complex signals with each other in order to determine the order of operation and suspension during alternate operation, so that the signal for wireless communication can be simplified. As a result, it is possible to prevent the communication processing by the first communication unit and the second communication unit from becoming complicated.

In a configuration in which the first control unit and the second control unit determine the order of operation and suspension during alternate operation based on the wireless communication between the first communication unit and the second communication unit, the first control is preferable. When the first submersible electric pump and the second submersible electric pump are operated alternately, the unit and the second control unit transmit and receive different individual identification information by wireless communication via the first communication unit and the second communication unit. It is configured to determine the order of operation and suspension. With this configuration, the first control unit and the second control unit can identify their own individuals by wirelessly communicating the unique individual identification information between the first submersible electric pump and the second submersible electric pump. By comparing the information with the received individual identification information of the other submersible electric pumps, the order of operation and suspension in the alternate operation can be easily determined.

In the submersible electric pump system according to the first aspect, preferably, when the first control unit is not in the order of operating the first submersible electric pump in the alternate operation, the wireless communication of the first communication unit and the second communication unit is performed. It is configured to control the operation of the stopped first submersible electric pump when the wireless communication of the first communication unit and the second communication unit is not restarted within a predetermined time after the failure is possible. If it is not the order in which the second submersible electric pump is operated in the alternate operation, the second control unit is the first from the time when the wireless communication between the first communication unit and the second communication unit becomes impossible until a predetermined time elapses. It is configured to control the operation of the stopped second submersible electric pump when the wireless communication of the communication unit and the second communication unit is not resumed. With this configuration, when the drainage by one submersible electric pump is not in time, the drainage can be performed by using a plurality of submersible electric pumps, so that the drainage can be surely performed.

In a configuration in which the first control unit and the second control unit determine the order of operation and suspension during alternate operation based on the wireless communication between the first communication unit and the second communication unit, the first control is preferable. The unit and the second control unit are based on the fact that the first communication unit and the second communication unit wirelessly communicate with each other every predetermined number of operations during the alternating operation of the first submersible electric pump and the second submersible electric pump. It is configured to redetermine the order of operation and suspension during alternate operation. With this configuration, even if the operation and stop timings of the first submersible electric pump and the second submersible electric pump are the same during the alternate operation due to some factor, the order is reviewed every predetermined number of operations. Therefore, it is possible to prevent the first submersible electric pump and the second submersible electric pump from being continuously operated and suspended at the same timing.

In a configuration in which the first control unit and the second control unit determine the order of operation and suspension during alternate operation based on the wireless communication between the first communication unit and the second communication unit, the first control is preferable. The unit and the second control unit are used for wireless communication by the first communication unit and the second communication unit in a state where the order of operation and suspension during the alternate operation of the first submersible electric pump and the second submersible electric pump is not determined. If this is not possible, the first submersible electric pump and the second submersible electric pump are operated, respectively, and after wireless communication by the first communication unit and the second communication unit becomes possible, the first communication unit and the second communication unit are performed. The communication unit is configured to determine the order of operation and suspension in the case of alternate operation based on wireless communication. With this configuration, when the first submersible electric pump and the second submersible electric pump are underwater and wireless communication cannot be performed, the first submersible electric pump and the second submersible electric pump are operated to drain water for wireless communication. After the possible state, the order of operation and suspension in the alternate operation can be determined.

In the submersible electric pump system according to the first aspect, preferably, the first control unit is the first when the power is turned on, then turned off, and then turned on within a predetermined time. The submersible electric pump is configured to be forced to operate, and the second control unit is set to turn on the power, then turn it off, and then turn it on within a predetermined time. It is configured to force the electric pump to operate. With this configuration, even if only one of the first submersible electric pump and the second submersible electric pump is arranged and wireless communication by the first communication unit and the second communication unit is not possible, the power can be turned on and the power can be turned on. By the OFF operation, one of the first submersible electric pump and the second submersible electric pump can be operated independently. As a result, a trial run for confirming the operating state of one of the first submersible electric pump and the second submersible electric pump can be easily performed.

The submersible electric pump according to the second aspect of the present invention is provided in the submersible electric pump main body, the control unit for controlling the operation of the submersible electric pump main body, and the submersible electric pump main body, and communicates with other submersible electric pumps. It includes a communication unit that performs wireless communication, and the control unit is configured to detect the water level based on the availability of wireless communication with the communication unit of another submersible electric pump of the communication unit.

In the submersible electric pump according to the second aspect of the present invention, as described above, the control unit is configured to detect the water level based on the possibility of wireless communication with the communication unit of the other submersible electric pump of the communication unit. .. As a result, unlike the case where the water level is detected using an electrode exposed to the outside like a capacitance type water level sensor, the electrode does not corrode or the electrode is not contaminated, so that wireless communication is possible or not. Based on this, the water level can be detected accurately. Further, since the water level can be detected based on mutual wireless communication between the communication unit and the communication unit of another submersible electric pump, it is possible to detect a common water level by a plurality of submersible electric pumps. As a result, when a plurality of submersible electric pumps are operated alternately, it is possible to prevent a difference in the detected water level and prevent one of the submersible electric pumps from being operated in large numbers. As a result, it is possible to provide a submersible electric pump capable of accurately detecting the water level and efficiently and alternately operating a plurality of submersible electric pumps.

In the operation method of the submersible electric pump according to the third aspect of the present invention, wireless communication is performed with each other by a plurality of communication units provided in the plurality of submersible electric pumps, and the water level is based on the possibility of wireless communication of the plurality of communication units. Is detected.

In the method of operating the submersible electric pump according to the third aspect of the present invention, as described above, the water level is detected based on the possibility of wireless communication of a plurality of communication units. As a result, unlike the case where the water level is detected using an electrode exposed to the outside like a capacitance type water level sensor, the electrode does not corrode or the electrode is not contaminated, so that wireless communication is possible or not. Based on this, the water level can be detected accurately. Further, since the water level can be detected based on the mutual wireless communication of the communication units provided in each of the plurality of submersible electric pumps, the common water level can be detected by the plurality of submersible electric pumps. As a result, when a plurality of submersible electric pumps are operated alternately, it is possible to prevent a difference in the detected water level and prevent one of the submersible electric pumps from being operated in large numbers. As a result, it is possible to provide an operation method of the submersible electric pump capable of accurately detecting the water level and efficiently operating a plurality of submersible electric pumps alternately.

In the method of operating the submersible electric pump according to the third aspect, preferably, the plurality of submersible electric pumps are alternately operated based on the water level detected based on the availability of wireless communication of the plurality of communication units. With this configuration, when a predetermined water level is detected based on the availability of wireless communication of a plurality of communication units, one of the plurality of submersible electric pumps is operated first, and after drainage, the availability of wireless communication is possible. When a predetermined water level is detected again based on the above, the other of the plurality of submersible electric pumps can be operated so that the plurality of submersible electric pumps can be alternately operated.

In this case, preferably, the order of operation and suspension during the alternate operation is determined based on the wireless communication of the plurality of communication units, and the plurality of submersible electric pumps are alternately operated. With this configuration, unlike the case where the timing of operation and suspension during alternate operation is independently determined by each of the plurality of submersible electric pumps, operation and suspension during alternate operation are performed by mutual communication. Since the order of the submersible electric pumps can be determined, it is possible to prevent the timing of operation and suspension of a plurality of submersible electric pumps from becoming the same. As a result, a plurality of submersible electric pumps can be reliably operated alternately. In addition, there is a case where the alternate operation is performed by a plurality of submersible electric pumps by making the detected water level of one submersible electric pump different from the detected water level of the other submersible electric pump like the conventional submersible electric pump that performs alternate operation. Unlike this, since the configurations of the plurality of submersible electric pumps can be made common, it is possible to prevent the configurations of the plurality of submersible electric pumps for alternating operation from becoming complicated.

According to the present invention, as described above, it is possible to accurately detect the water level and efficiently operate a plurality of submersible electric pumps alternately.

It is the schematic which showed the whole structure of the submersible electric pump system by one Embodiment of this invention. It is a block diagram which showed the control structure of the submersible electric pump by one Embodiment of this invention. It is a figure for demonstrating the 1st operation example of the submersible electric pump system by one Embodiment of this invention. It is a figure for demonstrating the 2nd operation example of the submersible electric pump system by one Embodiment of this invention. It is a figure for demonstrating the 3rd operation example of the submersible electric pump system by one Embodiment of this invention. It is a figure for demonstrating the 4th operation example of the submersible electric pump system by one Embodiment of this invention. It is a figure for demonstrating the determination of the operation time of the submersible electric pump system by one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of submersible electric pump system)
An embodiment of the present invention will be described with reference to FIGS. 1 to 7. The submersible electric pump system 100 according to the present embodiment is configured to drain the water flowing into the tank 1. As shown in FIG. 1, the submersible electric pump system 100 includes submersible electric pumps 3a and 3b. The submersible electric pumps 3a and 3b are configured to be driven by the electric power supplied from the AC power source 2. The submersible electric pumps 3a and 3b have the same configuration. The submersible electric pumps 3a and 3b include a submersible electric pump main body 31, a control unit 32, a communication unit 33, a cover 34, a pump control circuit 35 (see FIG. 2), and a motor 36 (see FIG. 2), respectively. , Including. The submersible electric pump 3a is an example of the "first submersible electric pump" in the claims, and the submersible electric pump 3b is an example of the "second submersible electric pump" in the claims. Further, the control unit 32 of the submersible electric pump 3a is an example of the "first control unit" in the claims, and the control unit 32 of the submersible electric pump 3b is the "second control unit" in the claims. This is an example. Further, the communication unit 33 of the submersible electric pump 3a is an example of the "first communication unit" in the claims, and the communication unit 33 of the submersible electric pump 3b is the "second communication unit" in the claims. This is an example.

The tank 1 is configured to store the inflowing water. The water flowing into the tank 1 is drained by the submersible electric pumps 3a and 3b.

The AC power supply 2 is configured to supply electric power to the submersible electric pumps 3a and 3b. The AC power supply 2 may supply commercial power or may supply power from a battery or the like. The AC power supply 2 supplies electric power to the submersible electric pump main body 31 via a power cord connected to the submersible electric pump main body 31 and a plug provided at the tip of the power cord. That is, when the plug is inserted into the AC power supply 2, power is supplied to the submersible electric pump main body 31, and when the plug is pulled out from the AC power supply 2, the power supply to the submersible electric pump main body 31 is stopped. ..

The submersible electric pumps 3a and 3b are arranged in the tank 1. Further, the submersible electric pumps 3a and 3b are configured to drain the water in the tank 1 to the outside. Further, the submersible electric pumps 3a and 3b are configured to operate by supplying electric power from the AC power source 2. Further, the submersible electric pumps 3a and 3b are configured to be usable underwater.

As shown in FIG. 2, the submersible electric pump 3a (3b) is operated by supplying AC power from the AC power source 2 to the motor 36. The control unit 32 controls the operation of the submersible electric pumps 3a and 3b (submersible electric pump main body 31). Specifically, the control unit 32 controls to supply AC power to the motor 36 via the pump control circuit 35. The control unit 32 has a CPU (central processing unit) 321 and a memory 322. The CPU 321 executes a control program stored in the memory 322 to control the submersible electric pump main body 31.

The communication unit 33 is configured to perform wireless communication with the communication unit 33 of another submersible electric pump 3a or 3b. Specifically, the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are configured to perform wireless communication with each other. The communication unit 33 is configured to perform communication according to, for example, the Bluetooth (registered trademark) standard.

The cover 34 is configured to cover the control unit 32, the communication unit 33, and the pump control circuit 35. That is, the control unit 32, the communication unit 33, and the pump control circuit 35 are arranged inside the submersible electric pump main body 31. The cover 34 is provided on the upper part of the submersible electric pump main body 31. That is, the communication unit 33 is provided above the submersible electric pump main body 31.

The pump control circuit 35 is configured to control the supply / stop of electric power from the AC power supply 2 to the motor 36. Specifically, the pump control circuit 35 controls the switch 351 to control the supply / stop of electric power to the motor 36. Further, the pump control circuit 35 is configured to convert the electric power supplied from the AC power supply 2 and supply it to the control unit 32. Further, the pump control circuit 35 is configured to convert the electric power supplied from the AC power supply 2 and supply it to the communication unit 33.

The pump control circuit 35 includes a capacitor and a resistor. Further, the pump control circuit 35 uses, for example, a capacitor and a resistor to lower the voltage of the electric power supplied from the AC power supply 2 to supply electric power to the control unit 32 and the communication unit 33. Further, the pump control circuit 35 may be configured to lower the voltage of the electric power supplied from the AC power supply 2 by using a transformer.

The motor 36 is configured to be rotationally driven by the electric power supplied from the AC power source 2. By rotating the impeller, the motor 36 sucks water from the tank 1 and discharges the sucked water through the pipe 37.

Here, in the present embodiment, the control unit 32 is configured to detect the water level based on whether or not wireless communication is possible between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. Here, since the wireless radio wave is difficult to fly in water, when the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are underwater, wireless communication cannot be performed. That is, based on the fact that the control unit 32 cannot perform wireless communication by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b, the water level in the tank 1 is set to the communication unit 33 of the submersible electric pump 3a and the communication unit 33. It is configured to detect that the water level is above the communication unit 33 of the submersible electric pump 3b. Further, based on the fact that the control unit 32 can perform wireless communication by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b, the water level in the tank 1 is set to the communication unit 33 of the submersible electric pump 3a and underwater. It is configured to detect that the water level is located below the communication unit 33 of the electric pump 3b.

In the communication of the communication unit 33, one communication unit 33 transmits a pulse signal, and one communication unit 33 receives a response signal from the other communication unit 33 to the pulse signal. That is, the control unit 32 determines that communication is possible by receiving a response signal in response to the transmission of the pulse signal. Further, the control unit 32 determines that communication is not possible when the response signal to the pulse signal is not received.

Further, in the present embodiment, the control unit 32 sets the submersible electric pump 3a and the submersible water based on the water level detected based on the availability of wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. It is configured to control the operation of the electric pumps 3b alternately. That is, based on the fact that the water level in the tank 1 becomes the ON water level or higher (wireless communication is not possible), one of the submersible electric pumps 3a and 3b is operated to drain the water in the tank 1. After that, the operation of the submersible electric pump 3a or 3b during operation is stopped based on the fact that the water level in the tank 1 becomes the OFF water level or less (wireless communication is restarted). Specifically, the operation of the submersible electric pump 3a or 3b during operation is stopped after the operation for a predetermined time after the wireless communication is resumed. Next, when the water level in the tank 1 becomes the ON water level or higher, the other of the submersible electric pumps 3a and 3b is operated to drain the water in the tank 1. After that, the water in the tank 1 is drained while operating the submersible electric pumps 3a and 3b alternately in the same manner.

Further, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b are configured to control the operation of each submersible electric pump main body 31 independently of each other. That is, in the case of alternating operation, when the water level in the tank 1 becomes ON water level or higher, the control unit 32 in the order of operation among the submersible electric pumps 3a and 3b operates the submersible electric pump main body 31. Control. Further, even when the water level in the tank 1 becomes ON water level or higher, the control unit 32, which is not in the order of operating the submersible electric pumps 3a and 3b, controls so as not to operate (pause) the submersible electric pump main body 31. To do.

Of the submersible electric pumps 3a and 3b, the control unit 32, which is not in the order of operation, does not have the water level in the tank 1 below the OFF water level after a predetermined time has elapsed after the water level in the tank 1 has reached the ON water level or higher. When (wireless communication does not resume), the submersible electric pump main body 31 is controlled to operate. That is, the other of the stationary submersible electric pumps 3a and 3b starts the operation so as to follow one of the operating submersible electric pumps 3a and 3b. As a result, drainage is performed by both the submersible electric pumps 3a and 3b.

Further, the control unit 32 is configured to determine the order of operation and suspension during alternate operation based on wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. ing.

Specifically, the control unit 32 alternately operates the submersible electric pumps 3a and 3b according to the order of transmitting and receiving signals by wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. It is configured to determine the order of operation and suspension at the time of.

Specifically, the control unit 32 transmits a signal from the communication unit 33 after a lapse of a predetermined time when power is supplied to the submersible electric pump main body 31. At that time, the control unit 32 determines the order of operation and suspension during the alternate operation based on the timing of receiving the same signal from the other submersible electric pumps 3a or 3b. When the control unit 32 receives a similar signal from another submersible electric pump 3a or 3b after transmitting a signal from the communication unit 33, the control unit 32 takes turns as a preceding pump for operating its own submersible electric pump main body 31 first. To determine. On the other hand, when the control unit 32 receives a similar signal from another submersible electric pump 3a or 3b before transmitting the signal from the communication unit 33, the control unit 32 operates its own submersible electric pump main body 31 afterwards ( Determine the order as a trailing pump (to pause first). That is, the submersible electric pump 3a or 3b that first transmitted the signal from the communication unit 33 (power was input first) was determined as the preceding pump, and later transmitted the signal from the communication unit 33 (power was input later). The submersible electric pump 3a or 3b is determined as the trailing pump.

In this case, even when the electric power is supplied to the submersible electric pumps 3a and 3b at the same time, the time for which the electric power is supplied to the control unit 32 is different due to the individual difference of the resistance and the capacitor of the pump control circuit 35. As a result, one of the submersible electric pumps 3a and 3b is determined as the leading pump, and the other is determined as the trailing pump.

Further, the control unit 32 alternately operates the submersible electric pumps 3a and 3b by transmitting and receiving different individual identification information by wireless communication via the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. It may be configured to determine the order of operation and suspension at the time of. For example, the control unit 32 transmits and receives individual identification information represented by numbers, alphabets, and the like via the communication unit 33. Then, the control unit 32 compares the transmitted individual identification information with the other party's individual identification information, and based on a predetermined rule, operates the submersible electric pump main body 31 first. Or it is decided as a trailing pump to be operated later. The predetermined rule is the size, priority, etc. of the individual identification information. The individual identification information is stored in the memory 322.

Further, the control unit 32 is based on wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b every predetermined number of operations during the alternate operation of the submersible electric pumps 3a and 3b. Therefore, it is configured to redetermine the order of operation and suspension during alternate operation.

Further, the control unit 32 is operated by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b in a state where the order of operation and suspension during the alternate operation of the submersible electric pumps 3a and 3b is not determined. It is configured to operate the submersible electric pumps 3a and 3b when wireless communication is not possible. Further, after the control unit 32 enables wireless communication by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b, the control unit 32 communicates with the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b. The unit 33 is configured to determine the order of operation and suspension during alternate operation based on wireless communication.

Further, the control unit 32 is configured to forcibly operate the submersible electric pump 3a (3b) when the power is turned on, then turned off, and then turned on within a predetermined time. There is. That is, the control unit 32 is configured to forcibly operate the submersible electric pump main body 31 by turning the power on and off regardless of whether or not the communication unit 33 can perform wireless communication. The timing of the power ON and OFF operations is recorded in the memory 322. As a result, the control unit 32 can determine that the power is turned on, then turned off, and then turned on within a predetermined time.

Further, the control unit 32 is configured to control the operation of the submersible electric pump main body 31 based on the change in the signal strength of the wireless communication with the other communication units 33 of the communication unit 33. That is, the control unit 32 of the submersible electric pump 3a (3b) is based on the change in the signal strength of the wireless communication of the plurality of communication units 33 (the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b). , It is configured to control the operation of the submersible electric pump 3a (3b).

Further, the control unit 32 is configured to determine the operating time of the submersible electric pump main body 31 based on a change in the signal strength of wireless communication with another communication unit 33 of the communication unit 33. That is, the control unit 32 has acquired the relationship between the change in signal strength and the change in water level in advance. Then, the control unit 32 acquires the time change of the water level based on the time change of the signal strength. Then, the control unit 32 estimates the operation time until the water level in the tank 1 becomes the OFF water level, and determines the operation time of the submersible electric pump main body 31.

(First operation example)
A first operation example of the submersible electric pump system 100 of the present embodiment will be described with reference to FIG. In the first operation example, the power of the submersible electric pumps 3a and 3b is turned on in a state where the water level is low and the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b can communicate with each other. Will be described.

At time t0, the power of the submersible electric pump 3a is turned on. Subsequently, at time t1, the power of the submersible electric pump 3b is turned on. When the power of the submersible electric pump 3a is turned on and the electric power is supplied, the control unit 32 of the submersible electric pump 3a determines the order of operation and suspension in the alternate operation at the time t2 after the predetermined time Ta. Start processing. Specifically, the control unit 32 of the submersible electric pump 3a controls to transmit a signal from the communication unit 33. When the power of the submersible electric pump 3b is turned on and the electric power is supplied, the control unit 32 of the submersible electric pump 3b determines the order of operation and suspension in the alternate operation at the time t3 after the predetermined time Ta. Start processing. Specifically, the control unit 32 of the submersible electric pump 3b controls to transmit a signal from the communication unit 33.

In this case, the control unit 32 of the submersible electric pump 3a transmits a signal from the communication unit 33 at the time t2 and receives a signal from another communication unit 33 at the time t3 after the time t2. As a preceding pump that operates 3a first, the order of operation and suspension during alternate operation is determined. Further, since the control unit 32 of the submersible electric pump 3b receives a signal from the other communication unit 33 at the time t2 and transmits a signal from the communication unit 33 at the time t3 after the time t2, the submersible electric pump 3a is used. As a trailing pump to be operated first, the order of operation and suspension during alternate operation is determined.

At time t4, communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b becomes impossible. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is equal to or higher than the ON water level. Then, since the control unit 32 of the submersible electric pump 3a itself is the leading pump, the submersible electric pump main body 31 is operated. On the other hand, the control unit 32 of the submersible electric pump 3b does not operate (pause) the submersible electric pump main body 31 because it is a trailing pump.

At time t5, communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is resumed. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is lower than the ON water level. The control unit 32 of the submersible electric pump 3a during operation stops the operation of the submersible electric pump main body 31 at the time t6 after the elapse of the predetermined time Tb from the time t5.

At time t7, the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b cannot communicate with each other. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is equal to or higher than the ON water level. Then, the control unit 32 of the submersible electric pump 3a does not operate (pause) the submersible electric pump main body 31 because it was operated last time. On the other hand, the control unit 32 of the submersible electric pump 3b operates the submersible electric pump main body 31 because it stopped last time.

At time t8, communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is resumed. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is lower than the ON water level. The control unit 32 of the submersible electric pump 3b during operation stops the operation of the submersible electric pump main body 31 at the time t9 after the elapse of the predetermined time Tb from the time t8.

(Second operation example)
A second operation example of the submersible electric pump system 100 of the present embodiment will be described with reference to FIG. In the second operation example, the power of the submersible electric pumps 3a and 3b is turned on in a state where the water level is high and the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b cannot communicate with each other. An example will be described.

At time t10, the power of the submersible electric pump 3a is turned on. Subsequently, at time t11, the power of the submersible electric pump 3b is turned on. When the power of the submersible electric pump 3a is turned on and the electric power is supplied, the control unit 32 of the submersible electric pump 3a determines the order of operation and suspension in the alternate operation at the time t12 after the predetermined time Ta. Start processing. Specifically, the control unit 32 of the submersible electric pump 3a controls to transmit a signal from the communication unit 33. When the power of the submersible electric pump 3b is turned on and the electric power is supplied, the control unit 32 of the submersible electric pump 3b determines the order of operation and suspension during the alternate operation at the time t13 after the predetermined time Ta. Start processing. Specifically, the control unit 32 of the submersible electric pump 3b controls to transmit a signal from the communication unit 33.

In this case, since the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are located at positions lower than the water level in the tank 1, wireless communication cannot be performed. Therefore, each of the control units 32 of the submersible electric pump 3a and the submersible electric pump 3b cannot receive the signal from the communication unit 33 of the other party. As a result, each of the control units 32 of the submersible electric pump 3a and the submersible electric pump 3b cannot determine the order of operation and suspension in the alternate operation.

The control unit 32 of the submersible electric pump 3a determines the order of operation and suspension during alternate operation at the time t14 when a predetermined time Tc has elapsed from the start of the process of determining the order of operation and suspension during alternate operation. The submersible electric pump main body 31 is operated while stopping the processing. The control unit 32 of the submersible electric pump 3b determines the order of operation and suspension during alternate operation at the time t15 when a predetermined time Tc has elapsed from the start of the process of determining the order of operation and suspension during alternate operation. The submersible electric pump main body 31 is operated while stopping the processing.

At time t16, communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is started. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is lower than the ON water level. Then, the control unit 32 of the submersible electric pump 3a during operation stops the operation of the submersible electric pump main body 31 at the time t17 after the elapse of the predetermined time Tb from the time t16. Further, the control unit 32 of the submersible electric pump 3b during operation stops the operation of the submersible electric pump main body 31 at the time t17 after the elapse of the predetermined time Tb from the time t16. In the example of FIG. 4, the operation of the submersible electric pump 3b is stopped slightly later than that of the submersible electric pump 3a.

Further, the control unit 32 of the submersible electric pump 3a starts a process of determining the order of operation and suspension during the alternate operation at time t17. Further, the control unit 32 of the submersible electric pump 3b starts a process of determining the order of operation and suspension during the alternate operation at time t17. In the example of FIG. 4, the timing of stopping the operation of the submersible electric pump 3a is earlier than the timing of stopping the operation of the submersible electric pump 3b due to individual differences in the resistance and the capacitor of the pump control circuit 35. As a result, the timing of transmitting the signal from the communication unit 33 of the submersible electric pump 3a becomes earlier than the timing of transmitting the signal from the communication unit 33 of the submersible electric pump 3b, and the submersible electric pump 3a is determined as the preceding pump. , The submersible electric pump 3b is determined as the trailing pump. When the operation is stopped using a timer or the like, the timing at which the submersible electric pump 3a and the submersible electric pump 3b stop operating is the same after the water level disappears, but in that case, the individual identification stored in the memory 322 is performed. The information is used to determine the order of operation and suspension during alternate operation.

At time t18, the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b cannot communicate with each other. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is equal to or higher than the ON water level. Then, since the control unit 32 of the submersible electric pump 3a itself is the leading pump, the submersible electric pump main body 31 is operated. On the other hand, the control unit 32 of the submersible electric pump 3b does not operate (pause) the submersible electric pump main body 31 because it is a trailing pump.

At time t19, communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is resumed. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is lower than the ON water level. The control unit 32 of the submersible electric pump 3a during operation stops the operation of the submersible electric pump main body 31 at the time t20 after the elapse of the predetermined time Tb from the time t18.

(Third operation example)
A third operation example of the submersible electric pump system 100 of the present embodiment will be described with reference to FIG. In the third operation example, when the water level is high and the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b cannot communicate with each other, the submersible electric pumps 3a and 3b are used for a predetermined time, respectively. An example of driving will be described.

At time t21, the power of the submersible electric pump 3a is turned on. Subsequently, at time t22, the power of the submersible electric pump 3b is turned on. When the power of the submersible electric pump 3a is turned on and the electric power is supplied, the control unit 32 of the submersible electric pump 3a determines the order of operation and suspension during the alternate operation at the time t23 after the predetermined time Ta. Start processing. Specifically, the control unit 32 of the submersible electric pump 3a controls to transmit a signal from the communication unit 33. When the power of the submersible electric pump 3b is turned on and the electric power is supplied, the control unit 32 of the submersible electric pump 3b determines the order of operation and suspension during the alternate operation at the time t24 after the predetermined time Ta. Start processing. Specifically, the control unit 32 of the submersible electric pump 3b controls to transmit a signal from the communication unit 33.

In this case, since the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are located at positions lower than the water level in the tank 1, wireless communication cannot be performed. Therefore, each of the control units 32 of the submersible electric pump 3a and the submersible electric pump 3b cannot receive the signal from the communication unit 33 of the other party. As a result, each of the control units 32 of the submersible electric pump 3a and the submersible electric pump 3b cannot determine the order of operation and suspension in the alternate operation.

The control unit 32 of the submersible electric pump 3a determines the order of operation and suspension during alternate operation at the time t25 when a predetermined time Tc has elapsed from the start of the process of determining the order of operation and suspension during alternate operation. The submersible electric pump main body 31 is operated while stopping the processing. The control unit 32 of the submersible electric pump 3b determines the order of operation and suspension during alternate operation at the time t26 when a predetermined time Tc has elapsed from the start of the process of determining the order of operation and suspension during alternate operation. The submersible electric pump main body 31 is operated while stopping the processing.

The control unit 32 of the submersible electric pump 3a stops the operation of the submersible electric pump main body 31 at a time t27 when a predetermined time Td has elapsed from the operation of the submersible electric pump main body 31, and also stops the operation and the suspension during the alternate operation. The process of determining the order is restarted. The control unit 32 of the submersible electric pump 3b stops the operation of the submersible electric pump main body 31 at a time t28 when a predetermined time Td has elapsed from the operation of the submersible electric pump main body 31, and also stops the operation and the suspension during the alternate operation. The process of determining the order is restarted. As in the second operation example, the timing of stopping the operation of the submersible electric pump 3a and the submersible electric pump 3b is shifted due to the individual difference of the resistance and the capacitor of the pump control circuit 35, or the submersible electric pump 3a and the submersible electric pump 3b are operated. When the stop timings are the same, the order of operation and suspension in the alternate operation is determined by using the individual identification information stored in the memory 322.

The control unit 32 of the submersible electric pump 3a determines the order of operation and suspension during alternate operation at the time t29 when a predetermined time Tc has elapsed since the process of determining the order of operation and suspension during alternate operation was resumed. The submersible electric pump main body 31 is operated while stopping the processing. The control unit 32 of the submersible electric pump 3b determines the order of operation and suspension during alternate operation at the time t30 when a predetermined time Tc has elapsed since the process of determining the order of operation and suspension during alternate operation was resumed. The submersible electric pump main body 31 is operated while stopping the processing.

At time t31, communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is started. As a result, the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each detect that the water level in the tank 1 is lower than the ON water level. Then, the control unit 32 of the submersible electric pump 3a during operation stops the operation of the submersible electric pump main body 31 at the time t32 after the elapse of the predetermined time Tb from the time t31. Further, the control unit 32 of the submersible electric pump 3b during operation stops the operation of the submersible electric pump main body 31 at the time t32 after the elapse of the predetermined time Tb from the time t31. In the example of FIG. 5, the operation of the submersible electric pump 3b is stopped slightly later than that of the submersible electric pump 3a.

Further, the control unit 32 of the submersible electric pump 3a starts a process of determining the order of operation and suspension during the alternate operation at the time t32. Further, the control unit 32 of the submersible electric pump 3b starts a process of determining the order of operation and suspension during the alternate operation at the time t32.
(4th operation example)
A fourth operation example of the submersible electric pump system 100 of the present embodiment will be described with reference to FIG. In the fourth operation example, an example in which the submersible electric pump 3a is forcibly operated among the submersible electric pumps 3a and 3b will be described.

At time t33, the power of the submersible electric pump 3a is turned on. Then, within the predetermined time Te, the power supply of the submersible electric pump 3a is temporarily turned off and then turned on again. At time t34, the control unit 32 of the submersible electric pump 3a forcibly operates the submersible electric pump main body 31. The control unit 32 of the submersible electric pump 3a stops the operation of the submersible electric pump main body 31 at a time t35 after a predetermined time Tf after the submersible electric pump main body 31 is forcibly operated.

After that, the control unit 32 of the submersible electric pump 3a returns to the normal processing. That is, since the control unit 32 of the submersible electric pump 3a has not determined the order of operation and suspension during the alternating operation, the process of determining the order of operation and suspension during the alternating operation is started.

(Determination of driving time)
The operation time determination process of the submersible electric pump system 100 of the present embodiment will be described with reference to FIG. 7.

The control unit 32 controls the operation of the submersible electric pump main body 31 based on the change in the signal strength of the wireless communication with the other communication units 33 of the communication unit 33. Specifically, the control unit 32 determines the operating time of the submersible electric pump main body 31 based on the change in the signal strength of the wireless communication. Here, the control unit 32 detects that the water level in the tank 1 is lower than the communication unit 33 based on the restart of the wireless communication by the communication unit 33. Then, the control unit 32 operates the submersible electric pump main body 31 for a predetermined time after the wireless communication by the communication unit 33 is restarted to further lower the water level in the tank 1. That is, when the amount of drainage of the submersible electric pump main body 31 is constant, the amount of water level drop differs depending on the cross-sectional area of the tank 1 and the amount of water flowing into the tank 1. Therefore, the control unit 32 acquires the change in the water level when the submersible electric pump main body 31 is operated, lowers the water level in the tank 1 to a position within a predetermined range, and then operates the submersible electric pump main body 31. Control to stop.

For example, the control unit 32 sets the signal strength level of wireless communication between LV0 and LV10. The signal strength level is relatively set as LV10 when the signal strength of the wireless communication of the plurality of communication units 33 becomes the maximum value, and as LV0 when the communication of the plurality of communication units 33 becomes impossible. Will be done. Further, the control unit 32 starts the operation of the submersible electric pump main body 31 when, for example, the signal strength level of the wireless communication of the plurality of communication units 33 becomes LV5. That is, the control unit 32 is configured to operate the submersible electric pump main body 31 when the signal strength level changes from the best LV10 to LV5.

Further, the control unit 32 measures the time from when the submersible electric pump main body 31 is started until the signal strength level reaches LV10, and determines the timer time for continuing the operation of the submersible electric pump main body 31. That is, the control unit 32 stores the water level of LV5 and the upper limit water level of LV10. Then, the control unit 32 determines the time for operating the submersible electric pump main body 31 based on the time for changing from the water level corresponding to LV5 to the water level corresponding to LV10.

The control unit 32 has a time Tm until the signal strength level changes from LV5 to LV10, which is the signal strength level at the start of operation, a water level difference d1 corresponding to LV5 and a water level corresponding to LV10, and LV5. The operation time Tn from the start of operation to the stop of operation is determined based on the water level difference d2 between the water level corresponding to the above and the stop water level.

(Effect of embodiment)
In this embodiment, the following effects can be obtained.

In the present embodiment, as described above, the control unit 32 is configured to detect the water level based on the availability of wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. As a result, unlike the case where the water level is detected using an electrode exposed to the outside like a capacitance type water level sensor, the electrode does not corrode or the electrode is not contaminated, so that wireless communication is possible or not. Based on this, the water level can be detected accurately. This makes it possible to prevent one of the submersible electric pumps 3a or 3b from being operated in large numbers when the two submersible electric pumps 3a and the submersible electric pumps 3b are operated alternately. As a result, the water level can be detected with high accuracy, and the plurality of submersible electric pumps 3a and 3b can be efficiently operated alternately.

Further, in the present embodiment, as described above, the control unit 32 is underwater based on the water level detected based on the availability of wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. It is configured to control the operation of the electric pump 3a and the submersible electric pump 3b alternately. As a result, when a predetermined water level is detected based on whether or not wireless communication is possible between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b, one of the submersible electric pump 3a and the submersible electric pump 3b Is operated first, and when a predetermined water level is detected again based on the availability of wireless communication after drainage, the other of the submersible electric pump 3a and the submersible electric pump 3b is operated so that a plurality of submersible electric pumps are operated. Alternate operation of 3a and 3b can be performed.

Further, in the present embodiment, as described above, the control unit 32 is operated in the alternate operation based on the wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. It is configured to determine the order of pauses. As a result, unlike the case where the timing of operation and suspension during alternate operation is independently determined by each of the plurality of submersible electric pumps 3a and 3b, the operation and suspension during alternate operation are performed by mutual communication. Since the order can be determined, it is possible to prevent the submersible electric pumps 3a and 3b from being operated and stopped at the same timing. As a result, the plurality of submersible electric pumps 3a and 3b can be reliably operated alternately. In addition, there is a case where the alternate operation is performed by a plurality of submersible electric pumps by making the detected water level of one submersible electric pump different from the detected water level of the other submersible electric pump like the conventional submersible electric pump that performs alternate operation. Differently, since the configuration of the submersible electric pump 3a and the configuration of the submersible electric pump 3b can be made common, it is possible to suppress the complicated configuration of the plurality of submersible electric pumps 3a and 3b for alternating operation. Can be done.

Further, in the present embodiment, as described above, the control unit 32 is electrically operated underwater by the order of transmitting and receiving signals by wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. It is configured to determine the order of operation and suspension during alternating operation of the pumps 3a and 3b. As a result, it is not necessary to wirelessly communicate complicated signals with each other in order to determine the order of operation and suspension in the case of alternate operation, so that the signal for wireless communication can be simplified. As a result, it is possible to prevent the communication process by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b from becoming complicated.

Further, in the present embodiment, as described above, the control unit 32 transmits and receives different individual identification information via wireless communication via the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. , The order of operation and suspension during alternate operation of the submersible electric pumps 3a and 3b is determined. As a result, the unique individual identification information is wirelessly communicated between the submersible electric pumps 3a and 3b, so that the control unit 32 of the submersible electric pump 3a and the control unit 32 of the submersible electric pump 3b each have their own individual identification information. By comparing with the received individual identification information of the other submersible electric pumps, it is possible to easily determine the order of operation and suspension in the case of alternate operation.

Further, in the present embodiment, as described above, when the control unit 32 is not in the order of operating the submersible electric pump 3a (3b) in the alternate operation, the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b communicate with each other. If the wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b does not resume within a predetermined time after the wireless communication of the unit 33 becomes impossible, the submersible electric pump is stopped. It is configured to control the operation of 3a (3b). As a result, when the drainage by one submersible electric pump 3a (3b) is not in time, the drainage can be performed by using the plurality of submersible electric pumps 3a and 3b, so that the drainage can be surely performed.

Further, in the present embodiment, as described above, during the alternate operation of the submersible electric pumps 3a and 3b, the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b are operated every predetermined number of times. Based on the wireless communication of the communication unit 33, the order of operation and suspension in the alternate operation is redetermined. As a result, even if the operation and stop timings of the submersible electric pumps 3a and 3b are the same for some reason, the order is reviewed every predetermined number of operations, so that the submersible electric pumps 3a and 3b Can be suppressed from continuing to run and pause at the same timing.

Further, in the present embodiment, as described above, the communication unit 33 of the submersible electric pump 3a is in a state in which the order of operation and suspension of the control unit 32 during the alternate operation of the submersible electric pumps 3a and 3b is not determined. And when wireless communication by the communication unit 33 of the submersible electric pump 3b is not possible, the submersible electric pumps 3a and 3b can be operated, and wireless communication can be performed by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b. After that, the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are configured to determine the order of operation and suspension in the alternate operation based on wireless communication. As a result, when the submersible electric pumps 3a and 3b are underwater and wireless communication cannot be performed, the submersible electric pumps 3a and 3b are operated to drain water to enable wireless communication, and then the operation and suspension during alternate operation are performed. The order of can be determined.

Further, in the present embodiment, as described above, when the power of the control unit 32 is turned on within a predetermined time, then turned off, and then turned on, the submersible electric pump 3a (3b) is turned on. It is configured to be forced to operate. As a result, even if only one of the submersible electric pumps 3a and 3b is arranged and wireless communication by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is not possible, the power is turned on and off. By the operation of, one of the submersible electric pumps 3a and 3b can be operated independently. As a result, a trial run for confirming the operating state of one of the submersible electric pumps 3a and 3b can be easily performed.

(Modification example)
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is shown by the scope of claims rather than the description of the above-described embodiment, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment, an example of a configuration in which two submersible electric pumps are provided in the submersible electric pump system is shown, but the present invention is not limited to this. In the present invention, the submersible electric pump system may be provided with three or more submersible electric pumps. In this case, the submersible electric pumps may be operated alternately one by one, or a plurality of submersible electric pumps may be operated alternately one by one.

Further, in the above embodiment, an example of a configuration in which AC power is supplied to the submersible electric pump is shown, but the present invention is not limited to this. In the present invention, DC power may be supplied to the submersible electric pump. In this case, the submersible electric pump may include a power conversion unit that converts DC power into AC power.

Further, in the above embodiment, an example of a configuration in which a plurality of communication units perform wireless communication according to the Bluetooth standard is shown, but the present invention is not limited to this. In the present invention, a plurality of communication units may perform wireless communication according to a standard other than the Bluetooth standard. For example, a plurality of communication units may perform wireless communication according to a standard such as the ZigBee standard or the WiFi standard. Further, a plurality of communication units may perform wireless communication by infrared communication.

Further, in the above embodiment, an example of a configuration in which the submersible electric pump is arranged in the tank is shown, but the present invention is not limited to this. In the present invention, the submersible electric pump may be arranged in an area other than the tank where drainage is required. For example, a submersible electric pump may be arranged in a pond, a river, a lake, or the like, or a submersible electric pump may be arranged in a water supply facility or a sewage system.

Further, in the above embodiment, an example of the configuration in which the communication unit is provided in the cover of the submersible electric pump is shown, but the present invention is not limited to this. In the present invention, the communication unit may be provided outside the cover of the submersible electric pump.

3a Submersible electric pump (1st submersible electric pump)
3b Submersible electric pump (second submersible electric pump)
31 Submersible electric pump body 32 Control unit (1st control unit, 2nd control unit)
33 Communication unit (1st communication unit, 2nd communication unit)
100 Submersible electric pump system

Claims (13)

The first submersible electric pump including the first control unit and
A second submersible electric pump including a second control unit,
The first communication unit provided in the first submersible electric pump and
A second communication unit provided in the second submersible electric pump and performing wireless communication with the first communication unit is provided.
A submersible electric pump system in which the first control unit and the second control unit are configured to detect a water level based on the availability of wireless communication between the first communication unit and the second communication unit. The first control unit and the second control unit are the first submersible electric pump and the second underwater based on the water level detected based on the availability of wireless communication between the first communication unit and the second communication unit. The submersible electric pump system according to claim 1, wherein the electric pumps are controlled to be operated alternately. The first control unit and the second control unit are configured to determine the order of operation and suspension during alternate operation based on the wireless communication between the first communication unit and the second communication unit. The submersible electric pump system according to claim 1 or 2. The first control unit and the second control unit are the first submersible electric pump and the second submersible electric pump according to the order of transmission and reception of signals by wireless communication of the first communication unit and the second communication unit. The submersible electric pump system according to claim 3, wherein the order of operation and suspension during alternating operation of the pumps is determined. The first control unit and the second control unit transmit and receive different individual identification information via wireless communication via the first communication unit and the second communication unit, thereby causing the first submersible electric pump and the first submersible electric pump. 2. The submersible electric pump system according to claim 3 or 4, which is configured to determine the order of operation and suspension during alternating operation of the submersible electric pumps. When the first control unit is not in the order of operating the first submersible electric pump in the alternate operation, the wireless communication between the first communication unit and the second communication unit becomes impossible until a predetermined time elapses. , The first submersible electric pump that has been stopped is controlled to operate when the wireless communication of the first communication unit and the second communication unit is not resumed.
When the second control unit is not in the order of operating the second submersible electric pump in the alternate operation, the wireless communication between the first communication unit and the second communication unit becomes impossible until a predetermined time elapses. 1. Any of claims 1 to 5, which is configured to control the operation of the stopped second submersible electric pump when the wireless communication of the first communication unit and the second communication unit is not resumed. The submersible electric pump system according to item 1. During the alternating operation of the first submersible electric pump and the second submersible electric pump, the first control unit and the second control unit perform the first communication unit and the second communication unit every predetermined number of operations. The submersible electric pump system according to any one of claims 3 to 5, wherein the submersible electric pump system is configured to redetermine the order of operation and suspension during alternate operation based on wireless communication. The first control unit and the second control unit are the first communication unit in a state in which the order of operation and suspension during the alternate operation of the first submersible electric pump and the second submersible electric pump is not determined. And when wireless communication by the second communication unit is not possible, the first submersible electric pump and the second submersible electric pump can be operated, and wireless communication can be performed by the first communication unit and the second communication unit, respectively. 3 to claim 3, wherein the order of operation and suspension in the case of alternate operation is determined based on the wireless communication between the first communication unit and the second communication unit. 5. The submersible electric pump system according to any one of 5 and 7. The first control unit is configured to forcibly operate the first submersible electric pump when the power is turned on, then turned off, and then turned on within a predetermined time. ,
The second control unit is configured to forcibly operate the second submersible electric pump when the power is turned on, then turned off, and then turned on within a predetermined time. , The submersible electric pump system according to any one of claims 1 to 8. Submersible electric pump body and
A control unit that controls the operation of the submersible electric pump body and
The submersible electric pump main body is provided with a communication unit that wirelessly communicates with the communication unit of another submersible electric pump.
The control unit is a submersible electric pump configured to detect a water level based on the possibility of wireless communication between the communication unit and the communication unit of the other submersible electric pump. Wireless communication is performed with each other by multiple communication units provided in each of the multiple submersible electric pumps.
A method of operating a submersible electric pump that detects a water level based on the availability of wireless communication of the plurality of communication units. The operation method of the submersible electric pump according to claim 11, wherein the plurality of submersible electric pumps are alternately operated based on the water level detected based on the availability of wireless communication of the plurality of communication units. Based on the wireless communication of the plurality of communication units, the order of operation and suspension during alternate operation is determined.
The method for operating a submersible electric pump according to claim 12, wherein the plurality of submersible electric pumps are operated alternately.

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